Battery cap with venting and liquid replenishment

Abstract

The utility model relates to lithium battery technical field, and specifically is a battery cap body of exhaust and liquid supplementing, including explosion -proof sheet and at least two sealing sheets, explosion -proof sheet assembly is in the end of battery shell, the middle part of explosion -proof sheet is equipped with passageway, the narrow end of passageway is communicated with battery shell inside, the wide end of passageway is communicated with battery shell outside, passageway forms multiple step holes, multiple step holes inside diameter successively expands from the narrow end to the wide end of passageway, first sealing sheet assembly is in adjacent battery shell inside second step hole and covers adjacent battery shell inside first step hole to seal battery shell, the battery of assembled after puncture has assembled completed sealing sheet and carries out exhaust / liquid supplementing through passageway, the sealing sheet of following one assembly is in adjacent and one step hole of inside diameter expansion to seal battery shell again after the sealing sheet of preceding one is punctured. The technical problem that battery assembly cannot exhaust, battery life is limited in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, specifically a battery cap that can release air and replenish liquid. Background Technology

[0002] Before leaving the factory, lithium batteries undergo a charge and discharge cycle. During the first charge and discharge, gas is generated inside the battery. This gas is released through the electrolyte filling hole on the battery, which completely blocks the filling hole. After the finished lithium battery is assembled at the factory, it is impossible to release the gas again. The internal pressure of the battery is an important factor affecting its lifespan. Summary of the Invention

[0003] In order to solve the technical problems of the inability to vent air and the limited battery life after battery assembly in the prior art, this application proposes a battery cap that can vent air and replenish liquid, thus solving the above-mentioned technical problems.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] This utility model provides a battery cap body capable of venting and replenishing fluid, comprising: an explosion-proof sheet, which is assembled at the end of a battery casing, and a channel is formed in the middle of the explosion-proof sheet. The narrow end of the channel communicates with the inside of the battery casing, and the wide end of the channel communicates with the outside of the battery casing. The channel forms multiple stepped holes, and the inner diameter of the multiple stepped holes expands outward from the narrow end to the wide end of the channel. At least two sealing sheets are provided. The first sealing sheet is assembled into the second stepped hole in the adjacent battery casing and covers the first stepped hole in the adjacent battery casing to seal the battery casing. After the assembled battery punctures the assembled sealing sheet, venting / replenishing fluid is performed through the channel. The next sealing sheet is assembled into an adjacent stepped hole with an outwardly expanding inner diameter after the previous sealing sheet is punctured, and covers the stepped hole where the previous sealing sheet was assembled to reseal the battery casing.

[0006] Furthermore, the channel forms three stepped holes, and correspondingly, there are two sealing sheets. The first sealing sheet is installed in the second stepped hole at the factory to seal the battery casing. After the first sealing sheet is punctured, the second sealing sheet is installed in the third stepped hole, which is furthest from the battery casing, and covers the second stepped hole to reseal the battery casing.

[0007] Furthermore, the size of the sealing strip is adapted to the size of the stepped hole at the assembly location.

[0008] Furthermore, the sealing sheet is assembled into the corresponding stepped hole by a full-circle sealing weld.

[0009] Furthermore, the welding position of the sealing sheet and the corresponding stepped hole is formed at the mating point between the outer periphery of the sealing sheet and the inner periphery of the stepped hole and extends to the mating point of their adjacent end faces.

[0010] Furthermore, the sealing sheet is connected to the explosion-proof sheet by laser welding.

[0011] Furthermore, both the sealing sheet and the explosion-proof sheet are made of aluminum.

[0012] Based on the above technical solution, the technical effects that this utility model can achieve are as follows:

[0013] This utility model discloses a battery cap body with venting and liquid replenishment capabilities. The first sealing plate is assembled with the explosion-proof plate to seal the battery casing before shipment. Customers can directly use it and assemble it into a battery. After the battery has been used for a period of time, the internal air pressure will increase. At this time, the first sealing plate can be punctured to perform venting / liquid replenishment. Then, the next sealing plate is assembled to reseal the battery casing, extending the battery life. This solves the technical problem in the prior art that the battery cannot vent after assembly and the battery life is limited. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of one embodiment of the ventable and liquid-replenishing battery cap of this utility model.

[0015] Wherein: 1-Explosion-proof sheet, 11-channel, 111-step hole; 2-sealing sheet; 3-welding position. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0017] This utility model provides a battery cap body capable of venting and replenishing fluid, comprising an explosion-proof sheet 1 and at least two sealing sheets 2. The explosion-proof sheet 1 is assembled at the end of the battery housing, and a channel 11 is formed in the middle of the explosion-proof sheet 1. The narrow end of the channel 11 communicates with the inside of the battery housing, and the wide end of the channel 11 communicates with the outside of the battery housing. The channel 11 forms a plurality of stepped holes 111, and the inner diameter of the plurality of stepped holes 111 expands outward from the narrow end to the wide end of the channel 11. The first sealing sheet 2 is assembled in the second stepped hole 111 in the adjacent battery housing and covers the first stepped hole 111 in the adjacent battery housing to seal the battery housing. After the assembled battery punctures the assembled sealing sheet 2, it vents / replenishes fluid through the channel 11. After the previous sealing sheet 2 is punctured, the next sealing sheet 2 is assembled at the adjacent stepped hole 111 with an outwardly expanding inner diameter and covers the stepped hole 111 at the assembly location of the previous sealing sheet 2 to seal the battery housing again.

[0018] like Figure 1 As shown, in a specific embodiment of this utility model, the channel 11 forms three stepped holes 111. Correspondingly, there are two sealing sheets 2. The first sealing sheet 2 is installed in the second stepped hole 111 at the factory to seal the battery casing. After the first sealing sheet 2 is punctured, the second sealing sheet 2 is installed in the third stepped hole 111, which is furthest from the battery casing, and covers the second stepped hole 111 to reseal the battery casing. Three stepped holes 111 need to be reserved on the explosion-proof sheet 1. The first stepped hole 111 with the smallest inner diameter is used for venting / liquid replenishment, the second stepped hole 111 is used for the initial sealing weld with the first sealing sheet 2, and the third stepped hole 111 with the largest inner diameter is used for the secondary sealing weld with the second sealing sheet 2.

[0019] In one specific embodiment of this utility model, the size of the sealing sheet 2 is adapted to the size of the stepped hole 111 at the assembly location.

[0020] In one specific embodiment of this utility model, the sealing sheet 2 is assembled in the corresponding stepped hole 111 by a full-circle sealing weld.

[0021] In one specific embodiment of this utility model, the welding position 3 of the sealing sheet 2 and the corresponding stepped hole 111 is formed at the mating point between the outer periphery of the sealing sheet 2 and the inner periphery of the stepped hole 111 and extends to the mating point of the adjacent end faces of the two to obtain a better sealing effect.

[0022] In one specific embodiment of this utility model, the sealing sheet 2 is connected to the explosion-proof sheet 1 by laser welding.

[0023] In one specific embodiment of this utility model, both the sealing sheet 2 and the explosion-proof sheet 1 are made of aluminum.

[0024] It should be understood that the specific embodiments described above are only for explaining the present invention and are not intended to limit the present invention. Obvious variations or modifications derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. A battery cap body capable of venting and replenishing liquid, characterized in that, include: An explosion-proof sheet (1) is assembled at the end of the battery housing. A channel (11) is provided in the middle of the explosion-proof sheet (1). The narrow end of the channel (11) is connected to the inside of the battery housing, and the wide end of the channel (11) is connected to the outside of the battery housing. The channel (11) is formed with a plurality of stepped holes (111). The inner diameter of the plurality of stepped holes (111) expands outward from the narrow end to the wide end of the channel (11). At least two sealing pieces (2), the first sealing piece (2) is fitted into the second stepped hole (111) in the adjacent battery housing and covers the first stepped hole (111) in the adjacent battery housing to seal the battery housing. After the assembled battery punctures the assembled sealing piece (2), it is vented / refilled through the channel (11). The second sealing piece (2) is fitted into the adjacent stepped hole (111) with an outwardly widened inner diameter after the first sealing piece (2) is punctured, and covers the stepped hole (111) where the first sealing piece (2) is fitted to reseal the battery housing.

2. The battery cap body capable of venting and replenishing liquid according to claim 1, characterized in that, The channel (11) forms three stepped holes (111), and correspondingly, there are two sealing pieces (2). The first sealing piece (2) is installed in the second stepped hole (111) at the factory to seal the battery casing. After the first sealing piece (2) is punctured, the second sealing piece (2) is installed in the third stepped hole (111) which is furthest from the battery casing, and covers the second stepped hole (111) to seal the battery casing again.

3. The battery cap body capable of venting and replenishing liquid according to claim 1, characterized in that, The size of the sealing plate (2) is adapted to the size of the stepped hole (111) at the assembly location.

4. The ventable and liquid-replenishing battery cap according to claim 1, characterized in that, The sealing sheet (2) is assembled into the corresponding stepped hole (111) by a full-circle sealing weld.

5. The ventable and liquid-replenishing battery cap according to claim 4, characterized in that, The welding position (3) of the sealing sheet (2) and the corresponding stepped hole (111) is formed at the mating point between the outer periphery of the sealing sheet (2) and the inner periphery of the stepped hole (111) and extends to the mating point of the adjacent end faces of the two.

6. The ventable and liquid-replenishing battery cap according to claim 4, characterized in that, The sealing sheet (2) is connected to the explosion-proof sheet (1) by laser welding.

7. The battery cap body capable of venting and replenishing liquid according to claim 1, characterized in that, The sealing sheet (2) and the explosion-proof sheet (1) are both made of aluminum.

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