TWI619290B - Packaging method and structure of lead acid battery - Google Patents

Abstract

The invention relates to a packaging method and a structure of a lead-acid battery, which aims to improve the traditional packaging method, which is easy to ooze the acid liquid during the process of acid injection and charging, so that the external electrical terminal is contaminated by acid and corrosion. The invention mainly comprises two metal terminal blocks on the acid-injecting cover plate of the battery slot, each metal terminal block is respectively provided with a pole column hole and a welding column which are separated from each other, and the acid-injecting cover plate is closed by welding. When the battery slot is above, the pole holes of the two metal terminal blocks are respectively welded and fixed to the positive and negative poles of the battery pole group to complete the sealing. After the acid injection and the charging of the battery pole group are completed, the two electrical terminals are respectively soldered. It is fixed on the welding post of the two metal terminal block and encapsulated, thereby effectively overcoming the problem that the acid solution overflows and pollutes the electrical terminal during the acid injection and charging process.

Description

Packaging method and structure of lead acid battery

The invention relates to a packaging method and a structure of a lead-acid battery, the technical content is that a metal terminal block is arranged on the acid-injecting cover plate, and the sequence of steps of sealing the pole hole and the soldering electrical terminal is changed, thereby avoiding the acid-contacting terminal being acid-injected In the process of charging, it is contaminated and corroded by acid.

As shown in the first and second figures, the conventional lead-acid battery includes a battery well 200 accommodating the battery pole group 100, and an acid-injecting cover 300 closed above the battery tank 200, wherein the battery pole group 100 has The positive and negative electrode columns 101 are convexly connected to the outside, and the acid-injecting cover plate 300 is pre-positioned with a plurality of acid injection holes 301 and two grooves 302 respectively located above the positive and negative electrode columns 101, and each groove 302 is respectively A pole hole 303 is provided for the positive and negative electrode posts 101 to be fitted.

The packaging method of the traditional lead-acid battery generally includes:

(a) The acid-injecting cover plate 300 is closed above the battery cell 200, so that the positive and negative electrode columns 101 respectively pass through the two-pole column hole 303, and a leak-stop O-ring 304 is respectively disposed on the periphery of the positive and negative electrode columns 101 to be closed. After the pole hole 303, the acid-injecting cover 300 is thermally welded to the upper periphery of the battery tank 200 or sealed with a resin.

(b) After the top ends of the positive and negative electrodes 101 are respectively soldered to the bottom end of one of the electrical terminals 102, the two electrical terminals 102 are electrically connected to the positive and negative electrodes 101.

(c) forming a package 305 by filling the epoxy resin (Epoxy) into the two recesses 302, the package 305 covering the bottom of the covered leak-proof O-ring 304, the positive and negative columns 101, and the electrical terminal 102. At the same time, the pole hole 303 is sealed.

(d) After the acid solution is injected into the battery well 200 from the plurality of acid injection holes 301 of the acid injection cap 300, the plurality of acid injection holes 301 are closed by a sealing cap.

(e) The two power terminals 102 are electrically connected to the external power source, and the external power source charges the battery pole group 100 through the two power terminals 102 and the positive and negative poles 101.

(f) cleaning the acid solution overflowing the acid-injecting cover 300 and the outside of the battery tank 200 during the acid injection and charging process, and cleaning the electrical terminal 102 to complete the packaging, and finally providing an upper cover 306 to shield the acid injection in the acid-injecting cover 300 The hole 301 is a finished product of a lead-acid battery.

The above packaging method has been used for a long time, but there are many problems for a long time. One is that the conventional lead-acid battery is manufactured by first fixing the electrical terminal 102 to the acid-injecting cover 300, and then performing battery formation such as acid injection and charging. (activation) step, in which the acid will inevitably generate a strong chemical reaction with the battery pole group 100. If the overflow bottle is not used to accept the acid solution, the acid foam or acid mist will be acidified by a plurality of acids. The hole 301 overflows to the outside of the acid-injecting cover plate 300; and even if the overflow bottle is installed to receive the overflowed acid solution, it is easy to have residual acid liquid dripping from the overflow bottle during the process of accepting the acid solution, causing acid contamination and corrosion. In the case of the electrical terminal 102, not only the integrity and conductivity of the electrical terminal 102 are affected, but also the entire lead-acid battery is rejected as a defective product.

The second is that although the epoxy resin has good bonding strength with the metal, the material of the acid-injecting cover plate 300 is usually a plastic material such as ABS or PP, and the bonding strength between the epoxy resin and the plastic material is poor, so that the package body 305 and the injection are made. The bonding strength between the acid cap plates 300 may not be able to withstand the chemical reaction pressure, which may cause the acid solution to overflow from the pole holes 303, the package body 305 and the grooves 302 to contaminate and corrode the electrical terminals 102 in the process. The use of the acid in the lower battery tank 200 is also likely to ooze out from this position, causing a concern about the quality of the lead-acid battery.

Therefore, how to improve the long-term existence of the conventional lead-acid battery packaging method is that the electrical terminal is susceptible to acid contamination and the sealing structure of the package is not stable, which will be solved by the inventors.

The object of the present invention is to provide a method and a structure for packaging a lead-acid battery, which mainly comprises providing a metal terminal block on an acid-injecting cover of a lead-acid battery, and using the combination of the metal terminal block and the pole and the electrical terminal. In order to improve the traditional packaging method, it is easy to seep out the acid solution during the process of acid injection and charging, so that the external electrical terminals are contaminated by acid and the sealing structure of the package is not stable.

In order to achieve the above object, the present invention provides a method for packaging a lead-acid battery, the lead-acid battery comprising a battery well accommodating a battery pole group, and an acid-injecting cover plate closed above the battery tank, wherein the battery pole The positive and negative columns are convexly arranged on the group; the packaging method comprises the following steps: (a) preparing the two metal terminal blocks respectively fixedly sealed on the acid-injecting cover plate corresponding to the positions of the positive and negative poles, each metal The terminal block is respectively provided with a pole column and a welding column which are separated from each other. When the acid injection cover is closed above the battery slot, the pole holes on the two metal terminal blocks are respectively aligned with the positive and negative poles. The positive and negative columns are respectively protruded from the two metal terminal blocks; (b) the acid-injecting cover is thermally welded to the periphery of the battery tank or sealed with a resin, and the positive and negative columns are respectively arranged with corresponding pole holes. Welding, the positive and negative columns are electrically connected to the two metal terminal blocks respectively, and the pole holes are closed; (c) the acid solution is injected into the battery tank from the plurality of acid injection holes of the acid injection cover, and the plurality of acid is sealed. Hole; (d) separate the two metal terminal blocks Connected to an external power source, the external power source charges the battery pole group through the two metal terminal blocks and the positive and negative poles; (e) cleans the acid that overflows the acid injection cover and the outside of the battery tank during the acid injection and charging process. After the liquid, an outer cover is disposed on the acid-injecting cover to shield the plurality of acid-injecting holes; and (f) the welding posts of the two metal terminal blocks are respectively welded to the bottom ends of the one-connecting electrical terminals, respectively, and the two metal terminal blocks are respectively The top potting layer forms a package covering the bottom ends of the positive and negative poles and the bottom end of the electrical terminal.

Through the above-mentioned encapsulation method, when the acid-injecting cover is welded or resin-sealed to be closed above the battery cell, the pole holes of the two metal terminal blocks are respectively welded and fixed to the positive and negative columns of the battery pole group to complete the sealing, and then the injection is performed. Acid and charging After the step, the two electrical terminals are soldered and fixed on the two metal terminal blocks, thereby effectively overcoming the acid overflow and contamination during the acid injection and charging process, corroding the electrical terminals, and the sealing structure of the package is unstable. The problem.

The implementation of each step is further explained below:

In the implementation, the outer periphery of the metal terminal block in the step (a) is surrounded by at least one groove, and the metal terminal block and the acid-injecting cover plate are combined by the in-mold injection molding method, so that the corresponding positions of the acid-injecting cover plate are formed. There is a convex portion embedded in the at least one groove.

In the implementation, the outer periphery of the metal terminal block in the step (a) is surrounded by at least one groove, the acid-injecting cover plate is pre-equipped with two mounting holes, and at least one groove of the metal terminal block is filled with a fixing agent and then fixed. Sealed in the mounting hole.

In the implementation, the step (c) is to close the plurality of acid injection holes and then clean the overflowed acid solution and then carry out the step (d).

In implementation, each of the metal terminal blocks has a concave shape, and a rib is disposed at the center to separate the two grooves, the welding column and the pole hole are respectively disposed in the two grooves, and the external power source of the step (d) The package is electrically connected to the barrier rib, and the package of the step (f) is filled in the two grooves.

The present invention further provides a package structure of a lead-acid battery, the lead-acid battery comprising a battery well accommodating a battery pole group and an acid liquid, and a heat-sealing or resin sealed on the battery tank and having a plurality of acid injection holes The acid-injecting cover plate is provided with a positive and negative electrode column protruding above the acid-injecting cover plate, wherein: the acid-injecting cover plate is sealed and fixed with a metal terminal block corresponding to the positions of the positive and negative electrode columns, respectively. Each of the metal terminal blocks is respectively provided with a welded column separated from each other, and a pole hole respectively fitted with the positive and negative poles respectively, and the positive and negative poles are respectively welded and fixed to the pole holes, so that the positive and the negative poles are fixed. The negative electrode columns are electrically connected to the two metal terminal blocks respectively, and the pole holes are closed; and the welding posts of the two metal terminal blocks are respectively fixed and fixed to the bottom end of one of the electrical terminals, and the top surface of the two metal terminal blocks is filled with glue. a package body covering the top end of the positive and negative poles and the bottom end of the electrical terminal, and the top of the two electrical terminals The end protrudes above the acid-coated cover.

In practice, each of the metal terminal blocks has a concave shape, and a rib is disposed at the center to separate the two grooves. The welding column and the pole hole are respectively disposed in the two grooves, and the package is filled in the two concaves. groove.

In operation, the outer periphery of the metal terminal block is surrounded by at least one groove, and is combined with the acid-injecting cover plate by in-mold injection molding, and the corresponding position of the acid-injecting cover plate is formed with the embedded in the at least one groove. Convex.

In the implementation, the outer periphery of the metal terminal block is surrounded by at least one groove, and the acid-injecting cover is pre-positioned with two mounting holes, and at least one groove of the metal terminal block is filled with a fixing agent and fixedly sealed in the mounting hole. .

During implementation, a convex ring for welding the positive and negative columns is pre-set around the pole hole.

Compared with the conventional packaging method, the present invention provides two metal terminal blocks on the acid-injecting cover plate, and when the acid-injecting cover plate is closed above the battery cells, the pole holes of the two metal terminal blocks are respectively positive with the battery pole group. The negative electrode column is welded and fixed to complete the sealing, and then the acid injection and the charging process through the two metal terminal blocks are performed, and then the two electrical terminals are soldered and fixed on the two metal terminal blocks to complete the filling and packaging step, thereby effectively overcoming The problems of acid overflow and contamination during the acid injection and charging process, corrosion of the electrical terminals, and the sealing structure of the package are not stable.

In the following, according to the technical means of the present invention, embodiments suitable for the present invention are listed, and the following description is in conjunction with the drawings:

[Prior technology]

100‧‧‧Battery

101‧‧‧正, negative column

102‧‧‧Electrical terminals

200‧‧‧ battery slot

300‧‧‧ acid coating cover

301‧‧‧ acid injection hole

302‧‧‧ Groove

303‧‧‧ pole hole

304‧‧‧Omitted O-ring

305‧‧‧Package

306‧‧‧上盖

[this invention]

100‧‧‧Battery

101‧‧‧正, negative column

200‧‧‧ battery slot

300‧‧‧ acid coating cover

301‧‧‧ acid injection hole

400‧‧‧Quantitative acid injection tube

500‧‧‧External power supply

501‧‧‧Electrical connection

10‧‧‧Installation holes

20‧‧‧Metal terminal block

21‧‧‧ trench

211‧‧‧ convex

22‧‧‧ ribs

23‧‧‧ Groove

24‧‧‧ pole hole

241‧‧‧ convex ring

25‧‧‧welding column

30‧‧‧ Sealing cover

40‧‧‧ Cover

50‧‧‧Power terminals

51‧‧‧ soldering piece

511‧‧‧Perforation

52‧‧‧Connecting piece

53‧‧‧Electrical connection piece

60‧‧‧Package

70‧‧‧ Cover

The first picture: an exploded view of a conventional lead-acid battery.

Figure 2: Schematic diagram of the package structure of a conventional lead-acid battery.

Third: An exploded perspective view of the lead acid battery of the present invention.

Fourth figure: Schematic diagram of the installation of the acid-filled cover plate and the metal terminal block of the present invention.

Fig. 5 is a schematic view showing the steps of sealing the acid-coated cover, the pole hole and the acid injection.

Fig. 6 is a schematic view showing the operation of the closed acid injection hole of the present invention.

Figure 7 is a schematic view showing the charging step of the present invention through a metal terminal block.

Figure 8: A schematic view of the present invention for providing an outer cover to shield a plurality of sealing covers.

Ninth view: Schematic diagram of the present invention for soldering electrical terminals.

Figure 11 is a schematic view of the present invention for forming a package by potting.

As shown in the third to tenth embodiments, the present invention provides a method and a structure for packaging a lead-acid battery. The lead-acid battery includes a battery well 200 in which the battery pole group 100 is housed, and a note enclosed above the battery tank 200. The acid cover plate 300, wherein the battery pole group 100 is convexly provided with positive and negative electrode columns 101. In the figure, the acid injection cover plate 300 is pre-positioned with a plurality of acid injection holes 301 and two installations above the positive and negative electrode columns 101. Hole 10; the packaging method includes the following steps:

As shown in the third and fourth figures, the metal terminal block 20 of the two mounting holes 10 can be sealed, and each of the metal terminal blocks 20 is surrounded by at least one groove 21, and the top surface of the metal terminal block 20 is The bottom is provided with a rib 22 to separate the two recesses 23, and the two recesses 23 are respectively provided with a pole hole 24 and a welding post 25, and a collar 241 is preset around the pole hole 24. .

The at least one groove 21 is provided for the purpose of allowing the metal terminal block 20 to be directly bonded to the acid-injecting cover plate 300 by in-mold injection molding, and injecting and molding the metal terminal block 20 on the acid-injecting cover plate 300. The corresponding position of the acid-injecting cover plate 300, that is, the inner edge of the mounting hole 10 is formed with a protruding protrusion 211 embedded in the groove 21, so that the metal terminal block 20 can be sealed and fixed to the acid-injecting cover plate 300; After the acid-injecting cover plate 300 and the mounting hole 10 are first formed, the at least one groove 21 of the metal terminal block 20 is filled and fixed in the mounting hole 10, and is also one of the feasible embodiments.

As shown in the fourth and fifth figures, when the acid injection cover 300 is closed above the battery slot 200, the pole holes 24 of the two metal terminal blocks 20 are respectively aligned with the positive and negative poles 101 in a tight fit manner. , so that the positive and negative columns 101 respectively protrude from the second On the metal terminal block 20. Next, the acid-injecting cover plate 300 is thermally welded to the upper portion of the battery cell 200 or sealed with a resin, and the circumferences of the positive and negative electrode columns 101 are respectively fixed to the convex ring 241 of the corresponding pole hole 24, so that the positive and negative columns 101 are fixed. They are electrically connected to the two metal terminal blocks 20 respectively, and the pole holes 24 are closed.

As shown in the fifth and sixth figures, after the acid solution is injected into the battery cell 200 from the plurality of acid injection holes 301 of the acid injection cap 300 by a set of quantitative acid injection tubes 400, respectively, each of the acid injection holes 301 is A sealing cap 30 closes the acid injection hole 301.

As shown in the seventh figure, the two metal terminal blocks 20 are electrically connected to the external power source 500. In practice, the electrical connection ends 501 of the external power source 500 can be electrically connected to the ribs 22 of the two metal terminal blocks 20, so that The external power source 500 charges the battery pole group 100 through the two metal terminal blocks 20 and the positive and negative poles.

As shown in the eighth figure, after cleaning the acid solution overflowing the acid-injecting cover 300 and the outside of the battery tank 200 during the acid injection and charging process, an outer cover 40 is disposed on the acid-injecting cover 300 to shield the plurality of sealing covers 30. .

As shown in the ninth and tenth views, the soldering posts 25 of the two metal terminal blocks 20 are respectively soldered to the bottom ends of the one of the electrical terminals 50. The electrical terminal 50 is integrally formed by stamping a metal sheet, and has a soldering piece 51 at the bottom end. The soldering piece 51 has a through hole 511 for fitting the soldering post 25, and a connecting piece 52 extends upward from the side of the soldering piece 51. The top end of the connecting piece 52 is bent laterally to form an electrical connecting piece 53.

After the through holes 511 of the two soldering posts 25 are respectively soldered and fixed to the soldering tabs 51 of the electrical terminal 50, the recesses 23 of the two metal terminal blocks 20 are respectively filled to form a package 60, and the package body 60 covers the package. The soldering piece 51 covering the top of the positive and negative poles 101 and the electrical terminal 50, and the electrical connecting piece 53 of the two electrical terminals 50 protrude above the acid-injecting cover 300, that is, the package structure of the lead-acid battery is completed. In the implementation, the cover plate 300 can also be provided with a cover 70 to shield the plurality of packages 60 and the two metal terminal blocks 20, so that the appearance of the acid-filled cover 300 is complete.

Through the above packaging method, the present invention provides a two-metal terminal block 20 on the acid-injecting cover plate 300, and when the acid-injecting cover plate 300 is closed above the battery cell 200, the pole holes 24 of the two-metal terminal block 20 are respectively connected to the battery. Positive and negative poles of pole group 100 The post 101 is welded and fixed to complete the sealing, in particular, after the acid injection and charging steps are performed, the two electrical terminals 50 are soldered and fixed on the two metal terminal blocks 20 and the potting and packaging step is completed, thereby effectively overcoming the conventional packaging method. During the acid injection and charging process, the acid liquid overflows and pollutes the electrical terminals, and the sealing structure of the package is unstable.

In addition, when the steps of the present invention are implemented, the acid solution outside the battery cover 300 and the battery cell 200 can be cleaned for the first time after the plurality of acid injection holes are closed, and then the charging and the second cleaning step are performed.

The above description of the embodiments and the drawings are merely illustrative of the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and should be similar or identical to the objects, structures, devices, features, etc. of the present invention. It belongs to the patent scope of the present invention.

Claims (10)

A method for packaging a lead-acid battery, the lead-acid battery comprising a battery slot containing a battery pole group, and an acid-injecting cover plate closed above the battery slot, wherein the battery pole group has a positive and negative electrode column The acid injection cover is pre-set with a plurality of acid injection holes; the packaging method comprises the following steps: (a) preparing the two metal terminal blocks respectively sealed and fixed on the acid injection cover plate corresponding to the positions of the positive and negative columns Each metal terminal block is respectively provided with a pole column and a welding column which are separated from each other. When the acid coating plate is closed above the battery slot, the pole holes on the two metal terminal blocks are respectively connected with the positive and negative columns. The alignment is performed so that the positive and negative columns protrude from the two metal terminal blocks respectively; (b) the acid-injecting cover is thermally welded to the periphery of the battery tank or sealed with a resin, and the positive and negative columns are respectively corresponding to each other. The pole hole is welded so that the positive and negative columns are electrically connected to the two metal terminal blocks respectively, and the pole holes are closed; (c) after the acid solution is injected into the battery tank from the plurality of acid injection holes of the acid injection cover, Close the complex number of acid holes; (d) separate the two metal terminal blocks Connected to an external power source, the external power source charges the battery pole group through the two metal terminal blocks and the positive and negative poles; (e) cleans the acid solution on the outside of the acid tank cover and the battery tank during the acid injection and charging process Thereafter, an outer cover is disposed on the acid-injecting cover to shield the plurality of acid-injecting holes; and (f) the welding posts of the two metal terminal blocks are respectively welded to the bottom ends of the one-connecting electrical terminals, and respectively, and the two metal terminal blocks are respectively The top potting layer forms a package covering the bottom ends of the positive and negative poles and the bottom end of the electrical terminal. The method for packaging a lead-acid battery according to claim 1, wherein the outer periphery of the metal terminal block in the step (a) is surrounded by at least one groove, and the metal terminal block and the acid-injecting cover are formed by in-mold injection molding. In combination, the corresponding positions of the acid-injecting cover plate are formed with protrusions embedded in the at least one groove. The method for packaging a lead-acid battery according to claim 1, wherein the outer periphery of the metal terminal block in the step (a) is surrounded by at least one groove, the acid-injecting cover is pre-equipped with two mounting holes, and the metal terminal At least one groove of the seat is filled with a fixing agent and then fixedly sealed Installed in the hole. The method for encapsulating a lead-acid battery according to claim 1, wherein the step (c) is to clean the overflow acid solution after the plurality of acid injection holes are closed, and then perform the step (d). The method for packaging a lead-acid battery according to any one of claims 1 to 4, wherein each of the metal terminal blocks has a concave shape, and a partition rib is disposed at the center to partition the two grooves, the welding column and the welding column The pole holes are respectively disposed in the two grooves, and the external power source of the step (d) is electrically connected to the barrier ribs, and the package of the step (f) is filled in the two grooves. A package structure of a lead-acid battery, the lead-acid battery comprising a battery tank containing a battery pole group and an acid liquid, and an acid injection cover having a plurality of acid injection holes sealed by heat welding or resin and then sealed above the battery tank a plate, the battery pole group is provided with a positive and negative electrode column protruding above the acid injection cover plate, wherein: the acid injection cover plate is sealed and fixed with a metal terminal block corresponding to the positions of the positive and negative electrode columns, and each metal terminal The seat is respectively provided with a welded column separated from each other, and a pole hole respectively fitted with the positive and negative poles, and the positive and negative poles are respectively welded and fixed to the pole hole, so that the positive and negative poles are respectively electrically connected. The second metal terminal block is connected to the two metal terminal blocks, and the soldering posts of the two metal terminal blocks are respectively soldered and fixed to the bottom end of the one of the electrical terminals, and the top surface of the two metal terminal blocks is filled to form a package. The second package covers the top ends of the positive and negative poles and the bottom end of the electrical terminal, and the top ends of the two electrical terminals protrude above the acid-injecting cover. The package structure of the lead-acid battery according to claim 6, wherein each of the metal terminal blocks has a concave shape, and a partition rib is disposed at the center to partition the two grooves, and the welding column and the pole hole are respectively disposed at the same In the two grooves, and the package is filled in the two grooves. The package structure of the lead-acid battery according to claim 6, wherein the outer periphery of the metal terminal block is surrounded by at least one groove, and is combined with the acid-injecting cover plate by in-mold injection molding, and the acid-injecting cover plate is The corresponding position is formed with a convex portion embedded in the at least one groove. The package structure of the lead-acid battery according to claim 6, wherein the outer periphery of the metal terminal block is surrounded by at least one groove, the acid-injecting cover plate is provided with two mounting holes, and at least one groove of the metal terminal block The groove is filled with a fixing agent and fixedly sealed in the mounting hole. The package structure of the lead-acid battery according to any one of claims 6 to 9, wherein a convex ring for welding the positive and negative columns is provided around the pole hole.