CN219457775U

CN219457775U - Battery temperature rising assembly, battery and device operated by battery

Info

Publication number: CN219457775U
Application number: CN202320547731.2U
Authority: CN
Inventors: 杨帆
Original assignee: Zhuhai Cosmx Battery Co Ltd
Current assignee: Zhuhai Cosmx Battery Co Ltd
Priority date: 2023-03-20
Filing date: 2023-03-20
Publication date: 2023-08-01
Anticipated expiration: 2033-03-20

Abstract

The utility model provides a battery heating assembly, a battery and equipment operated by the battery. The battery warming assembly includes: a battery heating body and an air barrier layer wrapping the surface of the battery heating body; the battery heating body comprises a heating layer, a heat insulation layer and a heat conduction layer, wherein the heat insulation layer and the heat conduction layer are arranged in a stacked mode, and the heating layer is positioned between the heat insulation layer and the heat conduction layer; wherein the heat generating layer is configured to generate heat in an aerobic environment. The utility model provides a battery temperature rising assembly which heats a battery by transferring self heat to the battery so as to enable the battery to rise temperature, thereby enabling equipment to normally operate.

Description

Battery temperature rising assembly, battery and device operated by battery

Technical Field

The utility model belongs to the technical field of temperature rising assemblies, and particularly relates to a battery temperature rising assembly, a battery and equipment operated by the battery.

Background

A battery is a device for energy conversion and storage. It converts chemical energy into electrical energy by reaction. Common batteries include lithium ion batteries, lead acid batteries, nickel hydrogen batteries, hydrogen fuel cells, and the like. The battery provides the energy required for operation of the mobile phone, tablet computer, POS machine, camera, unmanned aerial vehicle and other devices.

When these devices are used under low temperature conditions, the electrical properties of the battery of the device are reduced. Taking a lithium ion battery as an example, under a low-temperature working condition, the transmission rate of lithium ions in a positive electrode and a negative electrode is reduced, the viscosity of electrolyte is improved, lithium is easy to separate out from the negative electrode, a series of problems such as cycle attenuation and capacity reduction of the lithium ion battery are caused, equipment cannot normally operate, the experience of a user on the equipment is affected, and even potential safety hazards exist. Therefore, the battery of the device needs to be heated, and the battery is ensured to work under normal temperature working conditions.

Disclosure of Invention

The utility model provides a battery heating assembly which heats a battery of equipment under a low-temperature working condition, so that the battery can work normally, and the equipment can work normally.

The utility model provides a battery, which is heated by a battery heating assembly under a low-temperature working condition, so that the battery can work normally, and equipment using the battery can work normally.

The utility model provides a device operated by a battery, wherein a battery heating assembly heats the battery in the device under a low-temperature working condition, so that the battery in the device can work normally, and the device can operate normally.

In a first aspect, the present utility model provides a battery warming assembly comprising: a battery heating body and an air barrier layer wrapping the surface of the battery heating body; the battery heating body comprises a heating layer, a heat insulation layer and a heat conduction layer, wherein the heat insulation layer and the heat conduction layer are arranged in a stacked mode, and the heating layer is positioned between the heat insulation layer and the heat conduction layer;

wherein the heat generating layer is configured to generate heat in an aerobic environment.

As one embodiment, the heat insulating layer and the heat conducting layer are closed to form a closed cavity, and the heating layer is positioned in the cavity.

As one embodiment, the air barrier layer is disposed on the outer surfaces of the thermal insulation layer and the thermally conductive layer.

As one embodiment, the heat generating layer includes a coating film and a heat generating body surrounded by the coating film.

As one embodiment, the insulation layer comprises an insulation layer body;

the heat insulation layer body is a metal foil; or, the heat insulation layer body comprises a metal foil and a plastic film which are stacked, and the plastic film is positioned between the metal foil and the heating layer.

As an embodiment, the heat insulation layer further comprises a heat insulation layer, wherein the heat insulation layer is stacked with the heat insulation layer body, and the heat insulation layer is located between the heat insulation layer body and the heating layer.

As one embodiment, the heat insulating layer is provided with a plurality of through holes, and the total area S1 of the through holes and the area S2 of the heat insulating layer satisfy the following relationship:

0.25％ S2≤S1≤10％ S2。

as one embodiment, the aperture of the through-hole is 2-500 μm.

As one embodiment, the heat conducting layer is made of carbon black.

As one embodiment, the thickness of the insulating layer is 0.25-2mm;

the thickness of the heating layer is 0.5-10mm;

the thickness of the heat conducting layer is 0.25-2mm; and/or

The thickness of the battery heating body is 1.0-14mm.

In a first aspect, the present utility model provides a battery comprising the battery warming assembly provided in the first aspect.

In a second aspect, the present utility model provides a battery operated device comprising the battery warming assembly provided in the first aspect.

The battery temperature rising assembly has at least the following beneficial effects:

according to the battery heating assembly provided by the utility model, the battery of the equipment is heated under the low-temperature working condition, so that the battery can work normally, and the equipment can work normally.

Drawings

In order to more clearly illustrate the technical solutions of the present utility model, the drawings that are needed in the description of the embodiments of the present utility model will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of a battery warming assembly according to the present utility model;

fig. 2 is a schematic view of a structure of another battery warming assembly provided by the present utility model;

FIG. 3 is a view showing the state of use of the battery warming assembly in test example 1;

fig. 4 is a view showing the state of use of the battery warming module in test example 2.

Reference numerals:

1-a heat insulation layer;

2-a heating layer;

3-a heat conducting layer;

4-coating film;

5-heating body;

6-an air barrier layer;

10-a battery warming assembly;

20-an electronic device;

201-battery body.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, "set up" and "connect" may be fixed connection, detachable connection, or integral connection; the connection may be mechanical connection or electrical connection; the above-described specific meanings belonging to the present utility model will be understood in detail by those skilled in the art. The terms "first", "second", etc. are used for descriptive purposes only, e.g. to distinguish between components, to more clearly illustrate/explain the solution.

The utility model provides a battery temperature raising assembly. Referring to fig. 1, fig. 1 is a schematic structural diagram of a battery heating assembly according to the present utility model. The battery temperature increasing assembly includes: the battery temperature rising body and the air barrier layer wrapping the surface of the battery temperature rising body; the battery heating body comprises a heating layer 2, and a heat insulation layer 1 and a heat conduction layer 3 which are arranged in a stacked manner, wherein the heating layer 2 is positioned between the heat insulation layer 1 and the heat conduction layer 3; wherein the heat generating layer is configured to generate heat in an aerobic environment.

The battery temperature rising assembly provided by the utility model has the action mechanism that:

get rid of the air barrier layer, heat conduction layer 3 pastes the surface nearest to the battery of equipment, and air is through insulating layer 1 and/or heat conduction layer 3 and the contact of layer 2 that generates heat, and the oxygen in the air makes the layer that generates heat, and insulating layer 1 prevents heat to the external world to lose for most heat is through heat conduction layer 3 conduction to the battery of equipment rapidly, makes the battery intensify, thereby makes the normal operating of equipment.

In addition, compared with the existing battery heating device for improving the internal structure of the battery, for example, a heating wire, a heating plate or pulse heating is added, the battery heating assembly is simple and convenient to use, and the dead weight and the volume of the battery are not increased.

As an embodiment, please refer to fig. 2, the heat insulating layer 1 and the heat conducting layer 3 are closed to form a closed cavity, and the heating layer 2 is located in the cavity. The heat insulation layer and the heat conduction layer are closed to form a closed cavity, so that oxygen can be prevented from entering the heating layer from two sides of the heating layer to generate oxidation reaction to release heat when the battery heating assembly is not used, and heat can be prevented from being dissipated from two sides of the heating layer when the battery heating assembly is used.

As one embodiment, the air barrier layer is selected from a film formed of polyethylene, polypropylene, polystyrene, polymethyl methacrylate, polyvinyl chloride, polyamide (nylon), polycarbonate, polyurethane, or polytetrafluoroethylene.

As an embodiment, the air barrier layer may be a packaging bag, and the battery warming body is located in the packaging bag. The air in the packaging bag is exhausted, and the packaging bag is utilized to carry out vacuum packaging on the battery heating body; or the packaging bag is filled with nitrogen, carbon dioxide or argon and the like, so that the heating layer is prevented from being contacted with oxygen. To facilitate removal of the envelope, a tear-prone profile is provided at the edges of the envelope.

As an embodiment, please continue to refer to fig. 2, the heat generating layer 2 includes a coating film 4 and a heat generating body 5 wrapped by the coating film; the heat generating body 5 includes reduced iron powder, activated carbon, a catalyst, a water absorbent resin, and water.

The water-absorbing resin has a water-retaining effect, and meanwhile, the reduced iron powder, the activated carbon and the catalyst can be mixed to form a layered structure. Oxygen rapidly enters the heating body through the activated carbon, the reduced iron powder, the oxygen and the water undergo oxidation reaction under the action of the catalyst, heat is generated in the reaction process, and the heat is transferred to the battery through the heat conducting layer.

As one embodiment, the cover film is selected from the group consisting of nonwoven fabrics, meltblown fabrics, fibrous films, and the like.

As one embodiment, the heat generating body includes reduced iron powder, activated carbon, heat insulating particles, a catalyst, a water absorbent resin, and water. The water-absorbent resin has the function of water retention, and meanwhile, the reduced iron powder, the activated carbon and the catalyst can be mixed to form a layered structure.

In addition, oxygen rapidly enters the heating body through the activated carbon, the reduced iron powder, the oxygen and the water undergo oxidation reaction under the action of the catalyst, heat is generated in the reaction process, one part of the heat is directly transferred to the battery through the heat conducting layer, the other part of the heat is stored in the heat-preserving particles and is slowly released, and the heat is transferred to the battery through the heat conducting layer. The heat-insulating particles can prevent the temperature of the battery from being excessively high and prolong the heating time of the battery temperature-raising assembly to the battery.

As one embodiment, the mass fraction of the reduced iron powder in the heat generating body is 25% or more and 95% or less. In the content range of the reduced iron powder, the heat generated by oxidation reaction can enable the heating temperature of the battery heating component to be above 60 ℃, and the battery heating component can enable the temperature of the battery to be kept at 20-40 ℃ under low-temperature working conditions, for example, the working condition temperature is-20-5 ℃, so that the battery can work normally.

As one embodiment, the reduced iron powder has a particle size ranging from 0.2 to 150 μm in D50. For example 0.2-20 μm, or 5-20 μm. The heat generation rate of the oxidation reaction is controlled by controlling the particle size of the reduced iron powder. The method not only prevents too large reaction area caused by too small particle size of the reduced iron powder, so that the heat generation rate is too high, but also prevents too small reaction area caused by too large particle size of the reduced iron powder, the heat generation rate is slower, and the time for heating the battery to a proper temperature is prolonged.

As one embodiment, reduced iron powder is supported on activated carbon. The activated carbon can adsorb moisture and is used as a channel for air to enter the heating layer, oxygen in the air can be rapidly contacted with reduced iron powder in the activated carbon and the moisture, and oxidation reaction can be immediately carried out, so that heat is rapidly provided for the battery.

As one embodiment, the mass fraction of the activated carbon in the heat generating body is greater than or equal to 0.5% and less than or equal to 20%. The content of the activated carbon in the heating body is controlled to control the entering amount of oxygen, so that the progress of the oxidation reaction and the released heat are controlled, and the battery is quickly heated to a proper temperature, for example, 20-40 ℃.

As an implementationIn the mode, the specific surface area of the activated carbon is more than or equal to 400m ² And/g. The activated carbon with the specific surface area not only can enable oxygen to quickly permeate, but also can have a heat preservation effect.

As an embodiment, the insulating particles are selected from one or a combination of several of fumed silica, fumed alumina, glass fiber, vermiculite and the like. The materials have low heat conductivity coefficient and good heat insulation performance.

As one embodiment, the catalyst is an inorganic salt. The inorganic salt is selected from one or more of sodium chloride, magnesium chloride, calcium chloride, potassium chloride, etc.

The water-absorbent resin contains a large amount of hydrophilic groups, has water-absorbent property and excellent water-retaining property, and swells into hydrogel after absorbing water. The water-absorbent resin is not particularly limited as long as it can have water-absorbing and water-retaining properties.

As an embodiment, the mass ratio of moisture to reduced iron powder is 5:100 to 30:100, for example, 5: 100. 10: 100. 15: 100. 20: 100. 25: 100. 30:100 or any two thereof, the utility model is not limited in this regard.

As one embodiment, the insulating layer 1 comprises an insulating layer body; the heat insulation layer body is a metal foil; alternatively, the heat insulating layer body includes a metal foil and a plastic film that are stacked, and the plastic film is located between the metal foil and the heat generating layer.

The metal foil can effectively reduce heat dissipation, and further, the composite film formed by the metal foil and the plastic film can more effectively reduce heat dissipation, so that most of heat is supplied to the battery through the heat conducting layer to heat.

As one embodiment, the metal foil is selected from aluminum foil, copper foil, nickel foil, tin foil, and the like.

As one embodiment, the plastic film is selected from polyethylene films, polypropylene films, polyvinyl chloride, polystyrene films, polyamide (nylon) films, and the like.

As an embodiment, the heat insulation layer 1 further comprises a heat insulation layer, wherein the heat insulation layer and the heat insulation layer body are stacked, and the heat insulation layer is positioned between the heat insulation layer body and the heating layer.

Through the metal foil, the plastic film and the heat preservation that set gradually as far as possible reduce heat and lose from the insulating layer, and make the battery that heat concentrate on heating equipment, simultaneously the user can not feel scalding the hand when contacting battery heating assembly, feel more comfortable.

As one embodiment, the insulating layer is made of a material having a low thermal conductivity. The material with lower heat conductivity coefficient is selected from one or more of white carbon black, alumina, vermiculite and glass fiber.

As one embodiment, the heat insulating layer 1 is provided with a plurality of through holes, and the total area S1 of the through holes and the area S2 of the heat insulating layer satisfy the following relationship: s2 is more than or equal to 0.25 percent and S1 is more than or equal to 10 percent S2.

The through holes are beneficial to air to quickly penetrate through the heat insulation layer, oxygen in the air is promoted to enter the heating layer to perform oxidation reaction with reduced iron powder and moisture in the air, meanwhile, the ratio of the total area of the through holes to the area of the heat insulation layer is controlled, and the heating rate of the oxidation reaction and the temperature of the battery to be increased are regulated.

As one embodiment, the pore diameter of the through-hole is (2-500) μm, for example, a range of 2 μm, 3 μm, 4 μm, 5 μm, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, 40 μm, 50 μm, 100 μm, 200 μm, 300 μm, 400 μm, 500 μm or any two thereof, the utility model is not excessively limited herein. Under the condition of controlling the ratio of the total area of the through holes to the area of the heat insulation layer, the aperture of the through holes is in the range, so that the heat dissipation of the heating body from the through holes is effectively reduced.

As one embodiment, the plurality of through holes are uniformly arranged on the insulating layer.

As an embodiment, the heat conductive layer is made of carbon black, and may be a laminated structure including a binder and conductive carbon black; or the heat conducting layer is a heat conducting adhesive tape and a conductive carbon black layer which are arranged in a laminated way, and the conductive carbon black layer is contacted with the heating layer.

The heat conduction layer can not only firmly adhere the battery heating assembly on the equipment, but also improve the heat conduction efficiency of the battery, so that the battery is heated rapidly. The heat conducting layer containing the adhesive or the heat conducting adhesive tape can be firmly adhered to the outer surface of the equipment, and other parts are not needed to fix the battery heating body on the outer surface of the equipment, so that the use is convenient.

As one embodiment, the mass ratio of the binder to the conductive carbon black is (1-5): 1, for example 1: 1. 2: 1. 3: 1. 4: 1. 5:1 or any two thereof, the utility model is not limited herein.

As one embodiment, the adhesive is a pressure sensitive adhesive.

As one embodiment, the thickness of the insulating layer is (0.25-2) mm. For example, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, 0.55mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2mm, or any two of these ranges, the utility model is not excessively limited herein.

The thickness of the heating layer is (0.5-10) mm; for example, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, or any two of these, the utility model is not excessively limited herein.

The thickness of the thermally conductive layer is in the range of (0.25-2) mm, e.g., 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, 0.55mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2mm, or any two thereof, the utility model is not excessively limited herein.

As an embodiment, the total thickness of the heat insulating layer, the heat generating layer and the heat conducting layer is (1.0-14) mm, for example, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm or any two of these ranges, the utility model is not excessively limited herein.

As one embodiment, the weight of the battery warming body is (0.2-1) g/cm ² For example 0.2g/cm ² 、0.4g/cm ² 、0.6g/cm ² 、0.8g/cm ² 、1g/cm ² Or any two thereof, the utility model is not limited thereto.

The battery temperature rising assembly provided by the utility model has the advantages of thin thickness, small volume and light weight, and is convenient to carry and use. The device has little influence on the volume and the weight of the device, for example, when the device is applied to an unmanned aerial vehicle, the device has little influence on the flight weight of the unmanned aerial vehicle, and thus the cruising ability of a battery of the unmanned aerial vehicle is hardly influenced.

The utility model also provides a battery, which comprises the battery temperature rising assembly.

The present utility model is not limited to the kind of battery, for example, the battery includes a common lithium battery, a sodium battery, a lead-acid battery, a nickel-hydrogen battery, and the like.

The present utility model also provides a battery-operated apparatus, which includes the above-mentioned battery warming module, for example, in one embodiment, as shown in fig. 3 and 4, the apparatus includes an electronic device 20, a battery body 201 located in the electronic device, and a battery warming module 10 located inside or outside the electronic device 20, where the battery warming module 10 is disposed opposite to the battery body 201, and a heat conducting layer is adjacent to the battery body 201, and the electronic device may be a consumer product such as a mobile phone or an unmanned aerial vehicle.

The utility model is further illustrated by the following examples.

Example 1

The battery heating assembly has a square structure with the size of a battery heating body of 120 multiplied by 55 multiplied by 3mm, wherein the thickness of the heat insulation layer is 0.2mm, the thickness of the heating layer is 2.6mm, and the thickness of the heat conduction layer is 0.2mm.

The insulating layer mainly comprises nylon membrane and aluminium foil, and wherein the nylon layer is located the outside of heating up subassembly, and thickness is 0.05mm, and the aluminium foil is used for the protection to be used for keeping apart heat, prevents thermal loss, and thickness is 0.15mm. Through holes with the diameter of 10 mu m are distributed on the heat insulation layer, the total area of the through holes accounts for 2% of the area of the heat insulation layer, air is convenient to enter the heating layer when the battery heating assembly is used, and heat dissipation from the through holes is reduced.

The heating layer is mainly composed of iron powder, activated carbon, vermiculite, sodium chloride and water-absorbing resin, and the mass ratio of the heating layer is 80:5:5:2:8, wherein the average particle diameter of the iron powder is 0.5 μm. The heating layer is mainly coated by non-woven fabrics.

The heat conducting layer is mainly composed of adhesive pressure sensitive adhesive, heat conducting carbon black and the like, and the mass ratio of the heat conducting layer to the heat conducting carbon black is 95: and 5, fixing the battery temperature rising assembly with the heated battery and transferring heat.

The air barrier layer is a nylon membrane which is airtight and waterproof.

Test example 1

The fully charged mobile phone was placed in an environment of 0 c for 2 hours, and then the temperature raising member was torn off the air blocking layer, and as shown in fig. 3, the battery temperature raising body 10 was mounted on the surface of the casing of the mobile phone, and a temperature sensor was provided on the surface of the battery.

Through testing, when the temperature of the surface of the battery rises to 31 ℃ in 10min, and the time of the battery temperature being more than 20 ℃ exceeds 60min, the temperature rising assembly can quickly heat the battery to the normal working temperature and permanently heat the battery.

Test example 2

The unmanned aerial vehicle and the battery are placed in an outdoor environment at 5 ℃ for 2 hours, then the air barrier layer is torn off from the temperature rising assembly, as shown in fig. 4, the battery temperature rising body 10 is installed inside the unmanned aerial vehicle 20, the upper surface of the battery 30 is provided with a temperature sensor on the surface of the battery.

Through testing, when the temperature of the surface of the battery rises to 23 ℃ in 10min, the unmanned aerial vehicle is started at the moment, and the duration of the unmanned aerial vehicle exceeds 40min.

Unmanned aerial vehicle that does not use the subassembly of rising temperature, continuation of journey only 13min indicate that the subassembly of rising temperature can show to improve unmanned aerial vehicle's under the low temperature operating mode continuation of journey, and need not to use other heating or heat preservation measures.

It should be noted that, the numerical values and the numerical ranges related to the embodiments of the present utility model are approximate values, and may have a certain range of errors under the influence of the manufacturing process, and those errors may be considered to be negligible by those skilled in the art.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims

1. A battery warming assembly, characterized in that the battery warming assembly comprises: a battery heating body and an air barrier layer wrapping the surface of the battery heating body; the battery heating body comprises a heating layer, a heat insulation layer and a heat conduction layer, wherein the heat insulation layer and the heat conduction layer are arranged in a stacked mode, and the heating layer is positioned between the heat insulation layer and the heat conduction layer;

2. The battery warming assembly of claim 1 wherein the insulating layer and the thermally conductive layer are closed to form a closed cavity, and the heat-generating layer is located within the cavity.

3. The battery warming assembly of claim 2 wherein the air barrier layer is disposed on an outer surface of the thermal barrier layer and the thermally conductive layer.

4. The battery warming assembly according to any one of claims 1 to 3 wherein the heat-generating layer comprises a coating film and a heat-generating body surrounded by the coating film.

5. The battery warming assembly according to any one of claims 1-3 wherein the insulating layer comprises an insulating layer body;

6. The battery warming assembly according to claim 5 wherein the thermal insulation layer further comprises a thermal insulation layer disposed in a stack with the thermal insulation layer body, and wherein the thermal insulation layer is located between the thermal insulation layer body and the heat generating layer.

7. The battery warming assembly according to any one of claims 1 to 3, wherein the heat insulating layer is provided with a plurality of through holes, and a total area S1 of the through holes and an area S2 of the heat insulating layer satisfy the following relationship: s2 is more than or equal to 0.25 percent and S1 is more than or equal to 10 percent S2.

8. The battery warming assembly according to claim 7 wherein the aperture of the through-hole is 2-500 μm.

9. The battery warming assembly of any one of claims 1-3 wherein the thermally conductive layer is a carbon black material.

10. The battery warming assembly according to claim 1 wherein the thickness of the insulating layer is 0.25-2mm;

the thickness of the heating layer is 0.5-10mm;

the thickness of the heat conducting layer is 0.25-2mm; and/or

The total thickness of the heat insulation layer, the heating layer and the heat conduction layer is 1.0-14mm.

11. A battery comprising the battery warming assembly of any one of claims 1-10.

12. A battery operated device comprising the battery warming assembly of any one of claims 1-10.