CN218299991U

CN218299991U - Battery cover plate and battery

Info

Publication number: CN218299991U
Application number: CN202222595934.7U
Authority: CN
Inventors: 李峥; 韩波; 冯玉川; 陈凯; 何泓材
Original assignee: Suzhou Qingtao New Energy S&T Co Ltd
Current assignee: Suzhou Qingtao New Energy S&T Co Ltd
Priority date: 2022-09-29
Filing date: 2022-09-29
Publication date: 2023-01-13
Anticipated expiration: 2032-09-29

Abstract

The utility model belongs to the technical field of energy storage, and discloses a battery cover plate and a battery, wherein the battery cover plate comprises a cover plate body and a plurality of welding sheets, and the cover plate body is provided with a pole hole for connecting a pole; the multi-disc welding piece sets up and arranges on the apron body and along the circumference interval of utmost point post, welding piece and the outer peripheral face butt and the interference fit of utmost point post to insert to utmost point post hole after, multi-disc welding piece holds utmost point post tightly and fixes in utmost point post hole, and then has simplified secondary battery's assembly process, promotes secondary battery's assembly efficiency. The utility model provides a battery includes battery apron, casing and electric core as above-mentioned to help promoting secondary battery's assembly efficiency.

Description

Battery cover plate and battery

Technical Field

The utility model relates to an energy storage technology field especially relates to a battery cover plate and battery.

Background

The secondary battery can effectively solve the global problems of environmental pollution, energy crisis and the like. With the maturity of secondary battery production technology, secondary batteries are widely used in energy storage facilities such as electric bicycles and electric automobiles.

In the prior art, the welding ring structure is generally increased for strengthening the stability of the post structure of the secondary battery, the welding ring structure has a laser welding process, and along with the gradual improvement of a stamping process, a whole circle of flange can be stamped out on the periphery of the post hole of the secondary battery cover plate to replace the welding ring structure, so that the laser welding process is omitted.

However, when the post is assembled, the post needs to rotate after being placed in the post hole, so that the post is firmly matched with the cover plate or the clamping structure reserved on the welding ring, the assembling process of the secondary battery is complicated, the assembling efficiency is low, and the secondary battery has defects.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery cover plate and battery to optimize the process of assembling utmost point post, thereby promote secondary battery's assembly efficiency.

To achieve the purpose, the utility model adopts the following technical proposal:

a battery cover plate comprising:

the cover plate body is provided with a pole column hole, and the pole column hole is used for connecting a pole column; and

and the welding pieces are arranged on the cover plate body and are arranged at intervals along the circumferential direction of the pole, and the welding pieces are abutted against the outer circumferential surface of the pole and are in interference fit with the outer circumferential surface of the pole.

Preferably, the welding sheets surround an installation space, the cover plate body is recessed downwards at the position of the installation space to form a limiting groove, and the pole is inserted into the limiting groove.

Preferably, a plurality of the welding pieces are arranged at equal intervals along the periphery of the pole hole.

Preferably, the cover plate body further includes:

the explosion-proof valve, seted up explosion-proof hole on the apron body, be provided with in the explosion-proof hole explosion-proof valve.

Preferably, the explosion-proof sheet is provided with a weak part, and the weak part is used for destroying the explosion-proof sheet so as to allow the gas exhausted by the explosion-proof valve to pass through.

Preferably, the cover plate body further includes:

and the explosion-proof sheet is used for plugging the explosion-proof hole.

Preferably, the cover plate body further includes:

the sealing plug, the liquid hole is annotated to having seted up on the apron body, annotate the liquid hole and be used for pouring into electrolyte, the liquid hole is annotated in the sealing plug shutoff.

Preferably, the explosion-proof hole and the liquid injection hole are provided as one hole.

Preferably, the liquid pouring hole is stepped along the axial direction thereof.

The battery comprises a shell, a battery core and the battery cover plate, wherein the shell is provided with an opening, the battery core is installed in the shell, and the opening is plugged by the battery cover plate.

The utility model has the advantages that:

when assembling utmost point post, it is downthehole to insert utmost point post through the welding ring into utmost point post to make utmost point post be located the installation space that forms between the multi-disc welding piece all the time, and because of the installation space diameter is less than utmost point post diameter, when utmost point post inserted the welding ring, elastic deformation all took place for the multi-disc welding piece, thereby make the multi-disc welding piece all the time exert a power to utmost point post, and then accomplish the assembly back at utmost point post, the power combination formation of exerting force of multi-disc welding piece to utmost point post is embraced and is tightly held. Based on the above, can understand that, after utmost point post inserted to utmost point post downthehole assigned position, the welding ring has accomplished the fixed of utmost point post promptly, has saved from this among the prior art still need carry out processes such as rotation after utmost point post is put into utmost point post hole at utmost point post to secondary battery's assembly process has been simplified, and then help promoting secondary battery's assembly efficiency.

Drawings

Fig. 1 is a schematic structural diagram of a battery according to an embodiment of the present invention;

fig. 2 is an enlarged view of the embodiment of the present invention at B in fig. 1;

fig. 3 is an enlarged view of a portion a in fig. 1 according to an embodiment of the present invention.

In the figure:

1. a cover plate body; 11. a positive post hole; 12. a negative post hole; 13. an explosion-proof hole; 14. a liquid injection hole;

2. welding a ring; 21. a limiting groove; 22. welding the sheet;

3. a housing.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to be limiting.

Example (b):

referring to fig. 1, the present embodiment provides a battery, which includes a battery cover, a casing 3 and a battery cell (not labeled in the figure), wherein the casing 3 has an opening, the battery cell is installed in the casing 3, and the battery cover blocks the opening. Specifically, the housing 3 is provided in a hollow shape of a rectangular parallelepiped, and one side of the housing 3 in the length direction thereof is provided in an open manner to form an opening. The battery cover plate is arranged in a long strip shape, and the long strip battery cover plate is welded with the shell 3 along the length direction of the open side of the shell 3 and blocks the open side of the shell 3.

The structure of the battery cover including the cover body 1 will be described with reference to fig. 1. The cover plate body 1 is provided with a pole hole, and the pole hole is used for connecting a pole. It can be understood that two pole holes are formed, the two pole holes are respectively an anode pole hole 11 and a cathode pole hole 12, and the anode pole hole 11 and the cathode pole hole 12 are respectively formed at two ends of the cover plate body 1. The positive pole hole 11 is used for connecting a positive pole, the negative pole hole 12 is used for connecting a negative pole, and the positive pole and the negative pole can ensure the conduction of the current of the secondary battery.

Meanwhile, in order to improve the applicability of the battery cover plate, the cover plate body 1 further comprises an explosion-proof valve and a sealing plug. The cover plate body 1 is provided with an explosion-proof hole 13, and the explosion-proof valve is arranged in the explosion-proof hole 13. A liquid injection hole 14 is formed in the cover plate body 1, the liquid injection hole 14 is used for injecting electrolyte, and the liquid injection hole 14 is sealed and plugged by a sealing plug. Specifically, the explosion-proof hole 13 is opened in the middle of the cover plate body 1, and the liquid injection hole 14 is opened between the explosion-proof hole 13 and the negative pole hole 12. It should be noted that the explosion-proof valve is the prior art, and is not described in detail in this embodiment. In practice, the gas generated by the chemical reaction in the battery can be discharged from the battery through the explosion-proof valve, and the explosion of the battery can be prevented by rapidly responding to the excessive internal pressure.

It can be understood that the electrolyte can be injected into the battery through the injection hole 14 during the battery production process, so that the operation of injecting the electrolyte can be performed more efficiently and accurately. After the electrolyte is injected into the battery, the injection hole 14 is blocked by the sealing plug, which is helpful for improving the sealing performance of the battery. Of course, in other embodiments, after the pour hole 14 is closed by the sealing plug, a metal sheet may be welded around the pour hole 14 to further close the pour hole 14, which may further improve the sealing performance of the battery.

Further, in order to facilitate the injection of the electrolyte into the battery during the production process, referring to fig. 1 and 2, the injection hole 14 is stepped along the axial direction thereof, i.e., the upper surface of the injection hole 14 is lower than the upper surface of the cover plate body 1. When electrolyte is injected into the battery, the liquid outlet of the electrolyte injection device is attached to the upper surface of the liquid injection hole 14, the liquid outlet pipeline of the electrolyte injection device is communicated with the liquid injection hole 14 on the cover plate body 1, and then the electrolyte is injected into the battery. It can be understood that, above-mentioned electrolyte injection in-process is less than the upper surface of apron body 1 because of annotating 14 upper surfaces of liquid hole to when making 14 upper surfaces of liquid hole and electrolyte injection device's the liquid outlet laminating, realized spacingly to electrolyte injection device liquid outlet, and then help reducing electrolyte injection in-process electrolyte injection device and take place to rock, the condition of incline, finally can effectively avoid the condition that electrolyte injection in-process spills over.

In addition, in order to reduce the production cost of the battery, in other embodiments, the explosion-proof hole 13 and the liquid injection hole 14 may be provided as one hole. It should be noted that, when the explosion-proof hole 13 and the liquid injection hole 14 are provided as one hole, during the production process of the battery, it is necessary to inject the electrolyte into the battery, and then to install the explosion-proof valve into the hole. Of course, the explosion-proof hole 13 and the liquid injection hole 14 are arranged as one hole, and the installation of a plugging valve and the related procedures can be omitted, so that the production cost of the battery is reduced, and meanwhile, the assembly efficiency in the battery production process can be improved.

Based on the above, in order to reduce the foreign matter and fall into the effect that causes the explosion-proof valve in explosion-proof hole 13, apron body 1 still includes the explosion-proof piece, explosion-proof piece shutoff explosion-proof hole 13. In practical application, after the explosion-proof valve is installed, the explosion-proof sheet is welded on the periphery of the explosion-proof hole 13, and meanwhile, the explosion-proof sheet is covered on the explosion-proof hole 13, so that foreign matters can be effectively reduced from falling into the explosion-proof hole 13.

It should be noted that, in order to ensure the normal operation of the explosion-proof valve, a weak part is arranged on the explosion-proof sheet, and the weak part is used for destroying the explosion-proof sheet so as to allow the gas exhausted by the explosion-proof valve to pass through. It can be understood that when the internal pressure of the battery is too high due to the gas generated by the chemical reaction, the explosion-proof valve is opened, and the gas breaks through the weak part on the explosion-proof sheet and is discharged to the outside of the battery, so that the gas can be normally discharged out of the battery when the internal pressure of the battery is too high.

Preferably, referring to fig. 1 and 3, the cover plate body 1 further includes two welding rings 2, the two welding rings 2 are disposed corresponding to the positive pole hole 11 and the negative pole hole 12, and the two welding rings 2 have the same structure, which will be described below with reference to fig. 1 by taking the structure of one welding ring 2 as an example. Weld ring 2 and the coaxial setting in anodal post hole 11, weld ring 2 includes multi-disc welded piece 22 (apron body 1 includes multi-disc welded piece 22 promptly), and multi-disc welded piece 22 sets up and arranges on apron body 1 and along the circumference interval of utmost point post, and welded piece 22 and the outer peripheral face butt and the interference fit of utmost point post. The welding sheets 22 enclose an installation space, the cover plate body 1 is sunken downwards at the installation space to form a limiting groove 21, and the pole is inserted into the limiting groove 21. Specifically, the limiting groove 21 is coaxially communicated with the pole hole, and the notch of the limiting groove 21 is lower than the cover plate body 1. In this embodiment, the number of the welding pieces 22 is four, and in other embodiments, the number of the welding pieces 22 may be two, three or more, and preferably four welding pieces 22 are more convenient for practical operation.

Based on the above, can understand, when the assembly utmost point post, it is downthehole to insert utmost point post through weld ring 2 into utmost point post, thereby make utmost point post be located the installation space that forms between the multi-disc weld piece 22 all the time, and because of the installation space diameter is less than utmost point post diameter, when utmost point post inserted weld ring 2, elastic deformation all took place for multi-disc weld piece 22, thereby make multi-disc weld piece 22 all the time exert a power to the utmost point post, and then accomplish the assembly back at utmost point post, the power combination formation that multi-disc weld piece 22 exerted the power to the utmost point post is embraced tightly. Therefore, after the pole is inserted into the pole hole to be positioned, the welding ring 2 completes the fixation of the pole, and therefore the processes of rotation and the like after the pole is placed into the pole hole in the prior art are omitted, the assembly process of the battery is simplified, and the assembly efficiency of the battery is improved. It should be noted that, after the pole is inserted into the pole hole, the pole also penetrates through the limiting groove 21, and in order to further enhance the stability of the pole structure, the pole and the notch of the limiting groove 21 may be welded together. In this embodiment, the notch of the limiting groove 21 is slightly lower than the cover plate body 1, so that the welding seam formed after the pole and the notch of the limiting groove 21 are welded is not higher than the cover plate body 1, and the appearance is more attractive.

Further, a plurality of welding pieces 22 are arranged at equal intervals along the outer circumference of the pole hole. Therefore, the distance between any two adjacent welding sheets 22 is equal to the distance between any two other adjacent welding sheets 22, and the consistency and the stability of the post structure after welding are improved. In addition, the four welding sheets 22 in this embodiment are aluminum sheets, and since the aluminum sheets have higher conductivity and lower price compared with the same kind of metal, the aluminum welding sheets 22 can ensure that the pole structure made of aluminum welding sheets has good conductivity and lower production cost.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A battery cover plate, comprising:

the cover plate body (1) is provided with a pole column hole, and the pole column hole is used for connecting a pole column; and

the multi-welding-piece structure comprises a cover plate body (1), a plurality of welding pieces (22) and a plurality of connecting pieces, wherein the welding pieces (22) are arranged on the cover plate body (1) and are arranged along the circumferential direction of the pole at intervals, and the welding pieces (22) are abutted to the outer circumferential surface of the pole and are in interference fit with the outer circumferential surface of the pole.

2. The battery cover plate according to claim 1, wherein a plurality of the welding sheets (22) enclose a mounting space, the cover plate body (1) is recessed downwards at the position of the mounting space to form a limiting groove (21), and the pole is inserted into the limiting groove (21).

3. The battery cap plate according to claim 1, wherein a plurality of the welding tabs (22) are arranged at equal intervals along the outer circumference of the post hole.

4. The battery cap plate according to claim 1, wherein the cap plate body (1) further comprises:

the anti-explosion valve is characterized in that an anti-explosion hole (13) is formed in the cover plate body (1), and the anti-explosion valve is arranged in the anti-explosion hole (13).

5. The battery cap plate according to claim 4, wherein the cap plate body (1) further comprises:

and the explosion-proof sheet is used for plugging the explosion-proof hole (13).

6. The battery cover plate according to claim 5, wherein a weak portion is provided on the explosion-proof sheet for breaking the explosion-proof sheet to allow gas discharged from the explosion-proof valve to pass therethrough.

7. The battery cap plate according to claim 4, wherein the cap plate body (1) further comprises:

the sealing plug, it annotates liquid hole (14) to have seted up on apron body (1), annotate liquid hole (14) and be used for pouring into electrolyte into, hole (14) are annotated in the sealing plug shutoff.

8. The battery lid plate according to claim 7, wherein the explosion-proof hole (13) and the liquid injection hole (14) are provided as one hole.

9. The battery cover plate according to claim 7, wherein the pour hole (14) is stepped in its axial direction.

10. A battery, characterized by comprising a housing (3), a cell and a battery cover plate according to any one of claims 1 to 9, wherein the housing (3) has an opening, the cell is mounted in the housing (3), and the battery cover plate blocks the opening.