CN111477802A - Battery module, battery pack and vehicle - Google Patents
Battery module, battery pack and vehicle Download PDFInfo
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- CN111477802A CN111477802A CN202010368363.6A CN202010368363A CN111477802A CN 111477802 A CN111477802 A CN 111477802A CN 202010368363 A CN202010368363 A CN 202010368363A CN 111477802 A CN111477802 A CN 111477802A
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- battery module
- stacked body
- battery
- curb plate
- electrode connecting
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a battery module, a battery pack, and a vehicle. Wherein, the battery module includes: the stacking body comprises a plurality of stacking bodies, and the stacking bodies are formed by stacking a plurality of soft-package battery cells; in one stacked body, the positive electrode tabs and the negative electrode tabs of each soft-package battery cell are respectively connected to form positive electrode connecting parts and negative electrode connecting parts, and the stacked body is connected in series with the negative electrode connecting part/positive electrode connecting part of the other stacked body adjacent to the stacked body through the positive electrode connecting part/negative electrode connecting part; a terminal holder provided at the positive electrode connecting portion or the negative electrode connecting portion of the stacked body located at both ends; a middle support; which is provided between two adjacent stacks. The single soft package battery cells in the battery module are connected in parallel, and the tabs are connected in series and are directly connected, so that the cascade connection among all stacked modules is realized. The series-parallel copper bars and the external mounting structures are reduced, the grouped accessories of the modules are reduced, the cost and the weight are reduced, and the space utilization rate is improved.
Description
Technical Field
The invention relates to the field of new energy automobiles, in particular to a battery module, a battery pack and a vehicle.
Background
With the continuous popularization of new energy automobiles, the use requirements of power batteries in the new energy automobiles become higher and higher. Particularly, the requirement of a user on the continuous mileage of the new energy automobile is continuously improved, and the power battery pack of the common new energy automobile exceeds 1m in both the length direction and the width direction; however, in the current market, the length of the battery module is generally about 0.3m, so at least three or even more battery modules need to be arranged in the power battery pack.
The arrangement of a plurality of battery modules requires a fixing structure to be added to each battery module, and the assembly is complicated. Meanwhile, two adjacent battery modules need to be in power connection through an external power connecting piece. The battery module mounting structure is large, which not only increases the cost, but also increases the overall weight; simultaneously, in single module volume, mounting structure has taken more inner space, causes power battery module, and battery package whole capacity reduces, and battery module sets up more in the battery package, and the space is extravagant just more. In addition, because a plurality of external power connecting pieces are needed to be arranged for power connection, the internal resistance and the cost are increased, and the internal consumption and the cost of the power battery pack in use are improved.
In summary, the existing new energy automobile battery pack still needs to be improved.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. To this end, an object of the present invention is to propose a battery module, a battery pack, and a vehicle. The single soft package battery cells in the battery module are connected in parallel, and the tabs are connected in series and are directly connected, so that the cascade connection among all stacked modules is realized. Thereby, having reduced the series-parallel connection copper bar and the outside mounting structure between the pile body, having reduced module annex in groups, reduce cost and weight improve space utilization, and then can hold more utmost point groups at the battery package, promote vehicle continuation of the journey mileage.
In one aspect of the present invention, a battery module is provided. According to an embodiment of the present invention, the battery module includes:
the laminated body comprises a plurality of stacked bodies, and each stacked body is formed by stacking a plurality of soft packaging cells; in one stacked body, positive lugs of the soft-package battery cells are connected to form a positive connecting part, negative lugs of the soft-package battery cells are connected to form a negative connecting part, and the stacked body is connected in series with the negative connecting part/positive connecting part of the other stacked body adjacent to the stacked body through the positive connecting part/negative connecting part;
a terminal holder provided at a positive electrode connecting portion or a negative electrode connecting portion of the stacked body at both ends; two ends of the tail end support are respectively provided with a first positioning structure, and the middle part of the tail end support is provided with a lug extending groove; the first positioning structure comprises a lateral guide post and a lateral guide groove, and the lateral guide post and the lateral guide groove are respectively positioned on two sides of the first positioning structure and are mutually matched;
the middle support is arranged between two adjacent stacked bodies, and one middle support is arranged between the two adjacent stacked bodies on the left and right; one end of the middle bracket is provided with a front guide post, the other end of the middle bracket is provided with a second positioning structure, and the middle part of the middle bracket is provided with a lug extending groove; the second positioning structure comprises a front guide groove, a side guide post, a side guide groove and a bracket mounting hole, wherein the side guide post and the side guide groove are respectively positioned at two sides of the second positioning structure and are mutually matched; the front guide groove is matched with the front guide column;
the curb plate, the curb plate is established the left and right sides of folding the lamellar body, be equipped with a plurality of curb plate mounting holes, curb plate guide way and curb plate guide post on the curb plate, the curb plate mounting hole with the coaxial setting of support mounting hole, the curb plate guide way with the curb plate guide post is established respectively the inside and outside both sides of curb plate.
In the battery module according to the embodiment of the invention, each stacked body comprises a plurality of soft package battery cells, the positive electrode lugs in each soft package battery cell are collected to form the positive electrode connecting part, and the negative electrode lugs are collected to form the negative electrode connecting part. One stack is connected in series by the positive electrode connecting portion and the negative electrode connecting portion of the other stack adjacent thereto, or one stack is connected in series by the negative electrode connecting portion and the positive electrode connecting portion of the other stack adjacent thereto.
An intermediate support is provided between each of the two adjacent stacks on the left and right, and a terminal support is provided on the positive electrode connecting portion or the negative electrode connecting portion of the stack located at each of the two ends. The tail end support is provided with a first positioning structure, and two sides of the first positioning structure are respectively provided with a lateral guide groove and a lateral guide post, so that two laminated sheets which are adjacent side by side can be installed and fixed through the lateral guide groove and the lateral guide post; two adjacent stacked bodies are respectively provided with a middle bracket at the left and right sides between the two adjacent stacked bodies, and the two middle brackets are arranged in the up-down opposite directions, so that a front guide column on one middle bracket can be matched and installed with a front guide groove on the other middle bracket, and the two adjacent stacked bodies in one stacked body are fixed; two overlapped sheet bodies which are adjacent side by side can be installed and fixed through a side guide groove and a side guide column; the lamination stack located at both sides of the battery module may be mounted with the side plates by screws using the bracket mounting holes and the side plate mounting holes. In addition, in the lamination production stage, can pile up a plurality of soft-packaged electrical core for the pile body after, install end support and middle support earlier, make the utmost point ear of each soft-packaged electrical core stretch out utmost point ear and stretch out the groove, then connect each utmost point ear. Therefore, the tail end support and the middle support can play a role in limiting and supporting the pole lug rolling tool when the pole lug is bent. The side plate guide posts and the side plate guide posts on the side plates are respectively arranged on the inner side and the outer side of the side plates, when a plurality of battery modules are assembled into a large module side by side, the side plate guide posts and the side plate guide posts on the two side plates in different battery modules can be utilized to fix the two side plates, and therefore the two battery modules are fixed.
From this, the soft packet of electric core of monomer among this battery module is parallelly connected, and the concatenation utmost point ear lug connection has realized the cascade between each pile body module. Thereby, having reduced the series-parallel connection copper bar and the outside mounting structure between the pile body, having reduced module annex in groups, reduce cost and weight improve space utilization, and then can hold more utmost point groups at the battery package, promote vehicle continuation of the journey mileage. Meanwhile, the use of external power connecting pieces between modules is reduced, bolt connection between modules is avoided, the connection stability and reliability of the power connecting pieces do not need to be considered, the connection internal resistance is reduced, and further the internal consumption of the power battery pack in use is reduced.
In addition, the battery module according to the above embodiment of the present invention may further have the following additional technical features:
in some embodiments of the invention, in the stacked body, each of the soft-package cells is bonded by a structural adhesive.
In some embodiments of the invention, the thickness of the structural adhesive is 0.05-0.2 mm.
In some embodiments of the present invention, the end brackets and the middle bracket are made of insulating flame retardant materials.
In some embodiments of the invention, the length of the battery module is not less than 600 mm.
In some embodiments of the present invention, the positive electrode connection part and the negative electrode connection part are connected in series by laser welding, ultrasonic welding, or riveting.
In some embodiments of the invention, the side plates have a rib structure with indentations.
In some embodiments of the present invention, a buffering foam is disposed between two adjacent lamination bodies, and a buffering foam is disposed between the lamination body and the side plate.
In another aspect of the present invention, a battery pack is provided. According to an embodiment of the present invention, the battery pack includes: the battery module of the above embodiment. Therefore, the battery pack has all the features and advantages described above for the battery module, and thus, the description thereof is omitted. In general, the battery pack has the advantages of lower cost and weight, higher space utilization rate and reliability and the like.
In yet another aspect of the present invention, a vehicle is provided. According to an embodiment of the present invention, the vehicle includes the battery module of the above-described embodiment or the battery pack of the above-described embodiment. Therefore, the vehicle has all the features and advantages described above for the battery module or the battery pack, and thus, the detailed description is omitted. In general, the vehicle has better reliability and endurance mileage.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural view of a plurality of battery modules according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a laminate body in a battery module according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a laminate body in a battery module according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a flexible package cell in a battery module according to an embodiment of the invention;
fig. 5 and 6 are schematic structural views of the stack 110a of fig. 3 with the end brackets and the middle bracket mounted at different viewing angles, respectively;
fig. 7 and 8 are schematic structural views of the stack 110c of fig. 3 with the end brackets and the middle bracket mounted at different viewing angles, respectively;
FIG. 9 is an enlarged view of portion A of FIG. 5;
FIG. 10 is an enlarged view of portion B of FIG. 5;
FIG. 11 is an enlarged view of portion C of FIG. 6;
fig. 12 and 13 are structural diagrams of the stack 110b of fig. 3 with the end brackets and the middle bracket mounted, respectively, from different perspectives;
FIG. 14 is a schematic view of a side panel of the laminated body according to an embodiment of the present invention;
FIG. 15 is an enlarged view of portion D of FIG. 14;
fig. 16 is an enlarged view of the inside of the portion D in fig. 14.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. The term "adapted" can be understood in a broad sense or specifically refers to the arrangement position correspondence between two or more structural units, and can be connected or fixed with each other; for example, the adaptation between the guide groove and the guide column can be understood as that two structural units are correspondingly arranged and can be installed and fixed with each other; the adaptation between the bracket mounting hole and the threaded mounting hole is to be understood as the coaxial arrangement of the two structural units.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In one aspect of the present invention, a battery module is provided. Referring to fig. 1 to 13, according to an embodiment of the present invention, the battery module includes:
the laminated body 100, the laminated body 100 comprises a plurality of stacked bodies 110, and each stacked body 110 is formed by stacking a plurality of soft package core stacks 111; in one stacked body 110, the positive electrode tabs of the soft-package battery cells 111 are connected to form a positive electrode connecting part, the negative electrode tabs of the soft-package battery cells 111 are connected to form a negative electrode connecting part, and the stacked body 110 is connected in series through the positive electrode connecting part/negative electrode connecting part and the negative electrode connecting part/positive electrode connecting part of the other stacked body 110 adjacent to the stacked body;
a terminal holder 200, the terminal holder 200 being provided at the positive electrode connecting portion or the negative electrode connecting portion of the stacked body 110 located at both ends; the two ends of the tail end bracket 200 are respectively provided with a first positioning structure 210, and the middle part is provided with a tab extending groove 220; the first positioning structure 210 comprises a side guide post 211 and a side guide slot 212, wherein the side guide post 211 and the side guide slot 212 are respectively positioned at two sides of the first positioning structure 210 and are mutually matched;
the middle support 300 is arranged between two adjacent stacked bodies 110, and the middle supports 300 are arranged between the two adjacent stacked bodies 110 at the left and right sides respectively; one end of the middle bracket 300 is provided with a front guide post 310, the other end is provided with a second positioning structure 320, and the middle part is provided with a tab extending groove 330; the second positioning structure 320 comprises a front guide slot 321, a side guide post 322, a side guide slot 323 and a bracket mounting hole 324, wherein the side guide post 322, the side guide slot 323 and the bracket mounting hole 324 are respectively positioned at two sides of the second positioning structure and are matched with each other; the front guide groove 321 is matched with the front guide post 310;
the side plate 400 is arranged on the left side and the right side of the laminated sheet body 100, the side plate 400 is provided with a plurality of side plate mounting holes 430, side plate guide grooves 421 and side plate guide posts 422, the side plate mounting holes 430 and the support mounting holes 324 are coaxially arranged, and the side plate guide grooves 421 and the side plate guide posts 422 are respectively arranged on the inner side and the outer side of the side plate.
In the battery module according to the embodiment of the invention, each stacked body comprises a plurality of soft package battery cells, the positive electrode lugs in each soft package battery cell are collected to form the positive electrode connecting part, and the negative electrode lugs are collected to form the negative electrode connecting part. One stack is connected in series by the positive electrode connecting portion and the negative electrode connecting portion of the other stack adjacent thereto, or one stack is connected in series by the negative electrode connecting portion and the positive electrode connecting portion of the other stack adjacent thereto.
An intermediate support is provided between each of the two adjacent stacks on the left and right, and a terminal support is provided on the positive electrode connecting portion or the negative electrode connecting portion of the stack located at each of the two ends. The tail end support is provided with a first positioning structure, and two sides of the first positioning structure are respectively provided with a lateral guide groove and a lateral guide post, so that two laminated sheets which are adjacent side by side can be installed and fixed through the lateral guide groove and the lateral guide post; two adjacent stacked bodies are respectively provided with a middle bracket at the left and right sides between the two adjacent stacked bodies, and the two middle brackets are arranged in the up-down opposite directions, so that a front guide column on one middle bracket can be matched and installed with a front guide groove on the other middle bracket, and the two adjacent stacked bodies in one stacked body are fixed; two overlapped sheet bodies which are adjacent side by side can be installed and fixed through a side guide groove and a side guide column; the lamination stack located at both sides of the battery module may be mounted with the side plates by screws using the bracket mounting holes and the side plate mounting holes. In addition, in the lamination production stage, can pile up a plurality of soft-packaged electrical core for the pile body after, install end support and middle support earlier, make the utmost point ear of each soft-packaged electrical core stretch out utmost point ear and stretch out the groove, then connect each utmost point ear. Therefore, the tail end support and the middle support can play a role in limiting and supporting the pole lug rolling tool when the pole lug is bent. The side plate guide posts and the side plate guide posts on the side plates are respectively arranged on the inner side and the outer side of the side plates, when a plurality of battery modules are assembled into a large module side by side, the side plate guide posts and the side plate guide posts on the two side plates in different battery modules can be utilized to fix the two side plates, and therefore the two battery modules are fixed.
From this, the soft packet of electric core of monomer among this battery module is parallelly connected, and the concatenation utmost point ear lug connection has realized the cascade between each pile body module. Thereby, having reduced the series-parallel connection copper bar and the outside mounting structure between the pile body, having reduced module annex in groups, reduce cost and weight improve space utilization, and then can hold more utmost point groups at the battery package, promote vehicle continuation of the journey mileage. Meanwhile, the use of external power connecting pieces between modules is reduced, bolt connection between modules is avoided, the connection stability and reliability of the power connecting pieces do not need to be considered, the connection internal resistance is reduced, and further the internal consumption of the power battery pack in use is reduced.
The battery module according to the embodiment of the present invention is further described in detail below.
In the battery module of the present invention, a pouch cell, which is common in the art, is used. Referring to fig. 4, the pouch cell 111 includes a positive tab 111a and a negative tab 111 b. The outside of the soft package battery cell 111 is further wrapped with a packaging structure, such as an aluminum plastic film.
According to some embodiments of the invention, the tabs in the soft-packaged battery cells can be connected by ultrasonic welding, laser welding, argon arc welding or the like to form a positive electrode connecting part or a negative electrode connecting part.
According to some embodiments of the present invention, the number of stacks in one lamination body includes at least two, i.e., two stacks located at the end, and the number of stacks located in the middle of the lamination body is not particularly limited, and may be set to 0, 1, 2, 3, etc., according to actual needs. For example, fig. 3 shows a laminate stack that includes two stacks (110a and 110c) at the ends and one stack (110b) in the middle. Figures 5-13 particularly show a schematic view of the structure of each stack in the stack and the end supports and/or intermediate supports mounted thereon.
Referring to fig. 9 and 11, the end bracket 200 is provided at both ends thereof with a first positioning structure 210 and at the middle thereof with tab protruding grooves 220, respectively; the first positioning structure 210 includes a side guide post 211 and a side guide slot 212, and the side guide post 211 and the side guide slot 212 are respectively located at two sides of the first positioning structure 210 and are adapted to each other. Therefore, two laminated bodies adjacent side by side can be installed and fixed through the lateral guide groove and the lateral guide column.
Referring to fig. 10, the middle bracket 300 is provided at one end with a front guide post 310 and at the other end with a second positioning structure 320, and at the middle with a tab protruding groove 330; the second positioning structure 320 comprises a front guide slot 321, a side guide post 322, a side guide slot 323 and a bracket mounting hole 324, wherein the side guide post 322 and the side guide slot 323 are respectively positioned at two sides of the second positioning structure and are matched with each other; the front guide groove 321 is fitted to the front guide post 310. Thus, the front guide post on one middle bracket can be matched with the front guide groove on the other middle bracket, so that the two adjacent stacked bodies in one stacked body can be fixed. The bracket mounting hole 324 is used to mount the side plate 400.
Additionally, according to some embodiments of the present invention, referring to fig. 8 and 10, the end bracket 200 is further provided with a bracket mounting hole 213; the side plate may further have a side plate mounting hole 430 corresponding to the bracket mounting hole 213, so as to fix the side plate 400 and the end bracket 200, thereby improving structural stability.
According to some embodiments of the invention, in each of the end support and the middle support, the number of the tab extending grooves is the same as the number of the soft-package cells in the stacked body installed with the tab extending grooves, so that the tabs of the soft-package cells can be guided to extend from the tab extending grooves and then connected to form the positive electrode connecting part or the negative electrode connecting part. In addition, the lug extending grooves with the same number as that of the soft-package battery cells are adopted, and welding slag can be prevented from flying into the battery cells in the welding process of each lug.
Referring to fig. 14, according to some embodiments of the present invention, the side plate has a C-shaped structure and has a rib structure 410 with protrusions and depressions. Through set up the strengthening rib structure on the curb plate, can further be favorable to resisting the bulging force of electric core in the module.
According to some embodiments of the present invention, the material of the side plate may be metal or plastic, and the metal may be, for example, aluminum, copper, iron, an alloy material thereof, and the like. The plastic is preferably a high-strength thermosetting plastic, such as SMC (sheet molding compound). When the side plate is made of metal, the side plate can be formed by adopting processes such as stamping and the like, and when the side plate is made of plastic, the side plate can be formed by adopting processes such as mould injection and the like.
The tail end support and the middle support can be used for protecting the tabs obtained by connecting the soft-packaged cells in the stacked body in parallel. According to some embodiments of the present invention, the end brackets and the middle bracket are made of insulating flame retardant materials, such as PP, ABS, PC, PA66, and the like.
According to some embodiments of the present invention, the length of the battery module is not less than 600 mm.
According to some embodiments of the present invention, the positive electrode connection part and the negative electrode connection part are connected in series by laser welding, ultrasonic welding, or riveting. The tabs of each stacked body in the stacked body are connected singly or compositely in the above mode.
According to some embodiments of the invention, a buffer foam is arranged between two adjacent laminated pieces, and a buffer foam is arranged between the laminated piece and the side plate. From this, utilize the buffering bubble cotton both can provide fixed pretightning force for the equipment of group battery initial stage, also can use the later stage to absorb electric core bulging force at the group battery.
According to some embodiments of the present invention, structural glue may be used for bonding between each soft package battery cell in the stacked body, between two adjacent stacked body, between the side plate and the buffer foam and between the side plate and the stacked body, and the thickness of the structural glue may be 0.05-0.2 mm, for example, 0.05mm, 0.1mm, 0.15mm, 0.2mm, and the like. This can further improve the structural stability between the members.
In summary, the foldable battery pack according to the embodiment of the present invention has at least one of the following advantages:
1. the battery modules are connected internally, and no conductive additional structures such as copper bars and aluminum bars exist, so that the cost is low and the connection is quick;
2. each soft-packaged battery cell in the stacked body is firstly connected in parallel, then the stacked bodies are connected in series to form a stacked body, and the stacked bodies are connected in series, so that the number of assembled parts is reduced;
3. the side guide groove and the side guide post which are arranged on the side surfaces of the terminal protective shell and the middle protective shell are connected between the laminated bodies, so that a plurality of laminated bodies can be assembled and installed conveniently and quickly according to actual electric quantity requirements.
4. The multiple stacked bodies in the stacked body are connected through the front guide posts and the front guide posts of the middle protective shell, and the installation is quick and stable.
5. Compared with the traditional battery module in which each module is fixed and connected by four bolts, the battery module has the advantages that the bolts and the times for fixing each module are reduced, and the production efficiency is greatly improved;
6. compare in the traditional battery module that needs four bolt fastening, the space that is used for installation, module inflation, external connection need not be reserved between the lamination of the electric core of the same quantity, can increase substantially the volume utilization ratio of lamination in battery system.
In another aspect of the present invention, a battery pack is provided. According to an embodiment of the present invention, the battery pack includes: the battery module of the above embodiment. Therefore, the battery pack has all the features and advantages described above for the battery module, and thus, the description thereof is omitted. In general, the battery pack has the advantages of lower cost and weight, higher space utilization rate and reliability and the like.
In yet another aspect of the present invention, a vehicle is provided. According to an embodiment of the present invention, the vehicle includes the battery module of the above-described embodiment or the battery pack of the above-described embodiment. Therefore, the vehicle has all the features and advantages described above for the battery module or the battery pack, and thus, the detailed description is omitted. In general, the vehicle has better reliability and endurance mileage.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A battery module, comprising:
the laminated body comprises a plurality of stacked bodies, and each stacked body is formed by stacking a plurality of soft packaging cells; in one stacked body, positive lugs of the soft-package battery cells are connected to form a positive connecting part, negative lugs of the soft-package battery cells are connected to form a negative connecting part, and the stacked body is connected in series with the negative connecting part/positive connecting part of the other stacked body adjacent to the stacked body through the positive connecting part/negative connecting part;
a terminal holder provided at a positive electrode connecting portion or a negative electrode connecting portion of the stacked body at both ends; two ends of the tail end support are respectively provided with a first positioning structure, and the middle part of the tail end support is provided with a lug extending groove; the first positioning structure comprises a lateral guide post and a lateral guide groove, and the lateral guide post and the lateral guide groove are respectively positioned on two sides of the first positioning structure and are mutually matched;
the middle support is arranged between two adjacent stacked bodies, and one middle support is arranged between the two adjacent stacked bodies on the left and right; one end of the middle bracket is provided with a front guide post, the other end of the middle bracket is provided with a second positioning structure, and the middle part of the middle bracket is provided with a lug extending groove; the second positioning structure comprises a front guide groove, a side guide post, a side guide groove and a bracket mounting hole, wherein the side guide post and the side guide groove are respectively positioned at two sides of the second positioning structure and are mutually matched; the front guide groove is matched with the front guide column;
the curb plate, the curb plate is established the left and right sides of folding the lamellar body, be equipped with a plurality of curb plate mounting holes, curb plate guide way and curb plate guide post on the curb plate, the curb plate mounting hole with the coaxial setting of support mounting hole, the curb plate guide way with the curb plate guide post is established respectively the inside and outside both sides of curb plate.
2. The battery module of claim 1, wherein each of the pouch cells in the stack is bonded by a structural adhesive.
3. The battery module according to claim 2, wherein the structural adhesive has a thickness of 0.05 to 0.2 mm.
4. The battery module of claim 1, wherein the end brackets and the intermediate brackets are of an insulating flame retardant material.
5. The battery module according to claim 1, wherein the length of the battery module is not less than 600 mm.
6. The battery module according to claim 1, wherein the positive electrode connection part and the negative electrode connection part are connected in series by laser welding, ultrasonic welding, or riveting.
7. The battery module of claim 1, wherein the side plates have a ribbed structure with indentations.
8. The battery module according to claim 1, wherein buffering foam is arranged between two adjacent laminated sheets, and buffering foam is arranged between the laminated sheets and the side plates.
9. A battery pack, comprising: the battery module according to any one of claims 1 to 8.
10. A vehicle, characterized by comprising: the battery module according to any one of claims 1 to 8 or the battery pack according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010368363.6A CN111477802A (en) | 2020-04-30 | 2020-04-30 | Battery module, battery pack and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010368363.6A CN111477802A (en) | 2020-04-30 | 2020-04-30 | Battery module, battery pack and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111477802A true CN111477802A (en) | 2020-07-31 |
Family
ID=71757161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010368363.6A Withdrawn CN111477802A (en) | 2020-04-30 | 2020-04-30 | Battery module, battery pack and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111477802A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112751119A (en) * | 2021-01-15 | 2021-05-04 | 远景动力技术(江苏)有限公司 | Battery pack |
-
2020
- 2020-04-30 CN CN202010368363.6A patent/CN111477802A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112751119A (en) * | 2021-01-15 | 2021-05-04 | 远景动力技术(江苏)有限公司 | Battery pack |
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Application publication date: 20200731 |