Battery cover plate and battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery cover plate and a battery, the battery cover plate comprises a cover plate body provided with a first mounting through hole, a lower insulating part provided with a second mounting through hole, a conductive pin and a pole, the conductive pin is provided with a third mounting through hole, and the pole is provided with a second mounting through hole. The third mounting through hole is a conical hole with the hole diameter gradually increasing along the direction gradually away from the lower insulating part, the pole comprises a limiting part and a connecting part, the limiting part is arranged on the side, away from the lower insulating part, of the cover plate body, and the connecting part sequentially penetrates through the first mounting through hole, the second mounting through hole and the third mounting through hole; one end, deviating from the limiting part, of the connecting part is conical and matched with the third mounting through hole; and the connecting part with the conical end is riveted in the third mounting through hole of the conductive pin. Compared with the prior art, a riveting block for fixedly connecting the pole is omitted, so that the number of parts is reduced, the weight is reduced, the thickness is reduced, and the occupied space is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery cover and a battery. Background Art

[0002] A battery generally includes a battery cover, a battery shell and a battery cell electrode group. The battery shell is a shell structure with a single-side opening. A storage space is formed by placing the battery cover on the opening of the battery shell. The battery cell electrode group is arranged in the storage space, and an electrolyte is injected into the storage space.

[0003] The battery cover has the functions of fixing and sealing, current conduction, pressure relief and fuse protection. The current conduction is achieved by welding the poles on the battery cover to the pole ears of the battery cell pole group, thereby realizing the current conduction function.

[0004] During the assembly of traditional battery covers, the poles and rivet blocks are generally riveted together to achieve fixed connection of the poles to the bare aluminum plate. However, the battery cover of this structure has a relatively large overall thickness, resulting in a large weight of the battery cover, which is not conducive to the miniaturization and lightweight design of the battery. In addition, the battery cover will occupy a large space, resulting in a reduction in the space for storing the battery cell electrode group, thereby reducing the size of the battery cell electrode group, resulting in a lower overall energy density of the battery. Utility Model Content

[0005] The utility model aims to provide a battery cover and a battery with small thickness, light weight, small space occupation and high energy density.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] In one aspect, a battery cover is provided, the battery cover comprising:

[0008] A cover plate body, wherein a first mounting through hole is formed on the cover plate body;

[0009] A lower insulating member, the lower insulating member is arranged on a side of the cover body facing the cell electrode group, and the lower insulating member is further provided with a second mounting through hole communicating with the first mounting through hole;

[0010] A conductive pin, the conductive pin is arranged on a side of the lower insulating member away from the cover body, the conductive pin is provided with a third mounting through hole connected to the second mounting through hole, the third mounting through hole is a tapered hole whose aperture gradually increases as it gradually moves away from the lower insulating member;

[0011] A pole, the pole comprising a limiting portion and a connecting portion, the limiting portion being arranged on a side of the cover plate body away from the lower insulating member, the connecting portion being sequentially penetrated through the first mounting through hole, the second mounting through hole and the third mounting through hole, the end of the connecting portion away from the limiting portion being a cone adapted to the third mounting through hole, the connecting portion having a tapered end being riveted into the third mounting through hole of the conductive pin.

[0012] Optionally, the lower insulating member includes a lower insulating body and a supporting portion, the supporting portion is arranged on both sides of the lower insulating body, the third mounting through hole is opened on the lower insulating body, and the conductive pin includes a first pin and a second pin, the first pin abuts against the side of the lower insulating body away from the cover body, and the second pin abuts against the supporting portion.

[0013] Optionally, a limiting protrusion surrounding the third mounting through hole is provided on a side of the lower insulating body facing away from the cover body to form a first limiting area, and the first pin is arranged in the first limiting area.

[0014] Optionally, a limiting groove is provided on the support portion to form a second limiting area, and the second pin is embedded in the second limiting area.

[0015] Optionally, the battery cover plate further includes an upper insulating member, wherein the upper insulating member is disposed between the connecting portion of the pole and the cover plate body, and a fourth mounting through hole communicating with the first mounting through hole is further formed on the upper insulating member.

[0016] Optionally, a mounting groove is provided on the upper insulating member, and the connecting portion of the pole is embedded in the mounting groove.

[0017] Optionally, a receiving groove is provided on the cover plate body, and the upper insulating member is embedded in the receiving groove.

[0018] Optionally, the battery cover plate further includes a sealing member, which is sleeved on the connecting portion of the pole and is located between an outer wall of the connecting portion and an inner wall of the first mounting through hole.

[0019] Optionally, the sealing member includes a first sealing portion and a second sealing portion, wherein the first sealing portion is disposed between the connecting portion of the pole and the cover plate body, and the second sealing portion is disposed between an outer wall of the connecting portion and an inner wall of the first mounting through hole.

[0020] On the other hand, a battery is provided, comprising a battery cover as described in any one of the above items, and further comprising the battery cell electrode group and a battery shell, wherein the battery cover is arranged on the battery shell to form a accommodating chamber for placing the battery cell electrode group.

[0021] Beneficial effects of the utility model:

[0022] The utility model provides a battery cover, which forms a pole by adopting a limiting part and a connecting part, so that the limiting part abuts against the side of the cover body away from the lower insulating member, and the connecting part is sequentially passed through a first mounting through hole, a second mounting through hole and a third mounting through hole, and the tapered end of the connecting part is riveted in the third mounting through hole which is a tapered hole, thereby realizing the connection and fixation of the pole with the cover body, the lower insulating member and the conductive pin, eliminating the rivet block used for fixing the pole, thereby reducing the number of parts of the battery cover, reducing the weight, reducing the cost, reducing the thickness of the battery cover, and reducing the space occupied by the battery cover.

[0023] The utility model also provides a battery, which increases the external dimensions of the battery cell electrode group and improves the energy density of the battery by applying the battery cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an assembly diagram of the battery cover provided by the utility model;

[0025] Figure 2 This is a structural exploded view of the battery cover provided by the utility model;

[0026] Figure 3 It is a cross-sectional view of the battery cover provided by the utility model;

[0027] Figure 4 yes Figure 3 A magnified view of part A;

[0028] Figure 5 It is a structural schematic diagram of the cover plate body in the battery cover plate provided by the utility model;

[0029] Figure 6 It is a structural schematic diagram of the lower insulating member in the battery cover provided by the utility model;

[0030] Figure 7 It is a structural schematic diagram of the conductive pins in the battery cover provided by the utility model;

[0031] Figure 8 It is a structural schematic diagram of the pole in the battery cover provided by the utility model;

[0032] Figure 9 It is a structural schematic diagram of the upper insulating member in the battery cover provided by the utility model;

[0033] Figure 10 It is a structural schematic diagram of a sealing member in a battery cover provided by the utility model.

[0034] In the figure:

[0035] 1. Cover body; 11. First installation through-hole; 12. Accommodating groove;

[0036] 2. Lower insulating part; 21. Second installation through-hole; 22. Lower insulating body; 23. Support part; 24. Limit projection; 25. Limit groove;

[0037] 3. Conductive pin; 31. Third installation through-hole; 32. First pin; 33. Second pin;

[0038] 4. Terminal post; 41. Limiting part; 42. Connecting part;

[0039] 5. Upper insulating part; 51. Fourth installation through-hole; 52. Installation groove;

[0040] 6. Sealing part; 61. First sealing part; 62. Second sealing part. Detailed implementation mode

[0041] The following further describes the present utility model in detail with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the convenience of description, only parts related to the present utility model are shown in the drawings, rather than all structures.

[0042] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0043] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0044] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0045] A battery generally includes a battery cover, a battery shell and a battery cell electrode group. The battery shell is a shell structure with a single-side opening. A storage space is formed by placing the battery cover on the opening of the battery shell. The battery cell electrode group is arranged in the storage space, and an electrolyte is injected into the storage space.

[0046] The battery cover has the functions of fixing and sealing, current conduction, pressure relief and fuse protection. The current conduction is achieved by welding the poles on the battery cover to the pole ears of the battery cell pole group, thereby realizing the current conduction function.

[0047] During the assembly of traditional battery covers, the poles and rivet blocks are generally riveted together to achieve fixed connection of the poles to the bare aluminum plate. However, the battery cover of this structure has a relatively large overall thickness, resulting in a large weight of the battery cover, which is not conducive to the miniaturization and lightweight design of the battery. In addition, the battery cover will occupy a large space, resulting in a reduction in the space for storing the battery cell electrode group, thereby reducing the size of the battery cell electrode group, resulting in a lower overall energy density of the battery.

[0048] Therefore, in order to reduce the weight of the battery cover, achieve miniaturization and lightweight design, and reduce the space occupied by the battery cover, this embodiment provides a battery cover.

[0049] like Figures 1 to 10 As shown, the battery cover comprises a cover body 1, a lower insulating member 2, a conductive pin 3 and a pole 4, the cover body 1 is provided with a first mounting through hole 11, the lower insulating member 2 is arranged on the side of the cover body 1 facing the battery cell pole group, the lower insulating member 2 is further provided with a second mounting through hole 21 connected with the first mounting through hole 11, the conductive pin 3 is arranged on the side of the lower insulating member 2 away from the cover body 1, the conductive pin 3 is provided with a third mounting through hole 31 connected with the second mounting through hole 21, and the third mounting through hole 31 is a tapered hole whose aperture gradually increases as it moves away from the lower insulating member 2. The pole 4 includes a limiting portion 41 and a connecting portion 42. The limiting portion 41 is arranged on the side of the cover body 1 away from the lower insulating member 2. The connecting portion 42 is sequentially penetrated into the first mounting through hole 11, the second mounting through hole 21 and the third mounting through hole 31. One end of the connecting portion 42 away from the limiting portion 41 is a cone adapted to the third mounting through hole 31. The connecting portion 42 with a tapered end is riveted into the third mounting through hole 31 of the conductive pin 3.

[0050] The battery cover plate forms the pole 4 by adopting a limiting portion 41 and a connecting portion 42, so that the limiting portion 41 abuts against the side of the cover plate body 1 away from the lower insulating member 2, and the connecting portion 42 is passed through the first mounting through hole 11, the second mounting through hole 21 and the third mounting through hole 31 in sequence, and the tapered end of the connecting portion 42 is riveted into the third mounting through hole 31 which is a tapered hole, thereby realizing the connection and fixation of the pole 4 with the cover plate body 1, the lower insulating member 2 and the conductive pin 3, eliminating the riveting block used for fixing the pole 4, thereby reducing the number of parts of the battery cover plate, reducing the weight, reducing the cost, reducing the thickness of the battery cover plate, and reducing the space occupied by the battery cover plate.

[0051] In this embodiment, the battery cover can be used on a variety of different types of batteries, such as square shell batteries or blade batteries. The cover body 1 in this embodiment is a plain aluminum plate, the lower insulating member 2 is a plastic with insulating function, and the pole 4 is made by punching a convex bump on an aluminum block and a copper block.

[0052] Alternatively, if Figure 6 , Figure 7 As shown, the lower insulating member 2 includes a lower insulating body 22 and a support portion 23, the support portion 23 is provided on both sides of the lower insulating body 22, the third mounting through hole 31 is provided on the lower insulating body 22, and the conductive pin 3 includes a first pin 32 and a second pin 33, the first pin 32 abuts against a side of the lower insulating body 22 away from the cover body 1, and the second pin 33 abuts against the support portion 23. By abutting the first pin 32 against a side of the lower insulating body 22 away from the cover body 1, and the second pin 33 abutting against the support portion 23, the contact area between the lower insulating member 2 and the conductive pin 3 is increased, thereby improving the firmness of the structure.

[0053] In this embodiment, the lower insulating body 22 and the supporting portion 23 are vertically connected to form an L-shaped lower insulating member 2, and the first pin 32 and the second pin 33 are vertically connected to form an L-shaped conductive pin 3. The first pin 32 is parallel to the lower insulating body 22, and the second pin 33 is parallel to the supporting portion 23, thereby ensuring the firmness of the connection between the lower insulating member 2 and the conductive pin 3.

[0054] Alternatively, if Figure 6 , Figure 7As shown in the figure, a limiting protrusion 24 surrounding the third mounting through-hole 31 is provided on the side of the lower insulating body 22 facing away from the cover plate body 1, so as to form a first limiting area, and the first lead 32 is arranged in the first limiting area. By providing a limiting protrusion 24 surrounding the third mounting through-hole 31 on the side of the lower insulating body 22 facing away from the cover plate body 1 to form a first limiting area, the first lead 32 placed in the first limiting area is limited and fixed, ensuring that the conductive leads 3 will not move wrongly after assembly and avoiding the situation of incorrect installation positions. In this embodiment, the first limiting area is composed of three limiting protrusions 24 surrounding the third mounting through-hole 31.

[0055] Optionally, as Figure 6 , Figure 7 shown, a limiting groove 25 is formed on the supporting portion 23 to form a second limiting area, and the first lead 32 is embedded in the second limiting area. By forming a limiting groove 25 on the supporting portion 23 to form a second limiting area, the second lead 33 placed in the second limiting area is limited and fixed, ensuring that the conductive leads 3 will not move wrongly after assembly and avoiding the situation of incorrect installation positions.

[0056] Optionally, as Figure 2 , Figure 9 shown, the battery cover plate further includes an upper insulating member 5, and the upper insulating member 5 is arranged between the connecting portion 42 of the pole 4 and the cover plate body 1. A fourth mounting through-hole 51 communicating with the first mounting through-hole 11 is also formed on the upper insulating member 5. By arranging the upper insulating member 5 between the connecting portion 42 of the pole 4 and the cover plate body 1, the insulation performance of the battery cover plate is improved, and the safety of the battery cover plate is enhanced. In this embodiment, the upper insulating member 5 is made of a plastic with insulating function.

[0057] Optionally, as Figure 2 , Figure 9 shown, an installation groove 52 is formed on the upper insulating member 5, and the connecting portion 42 of the pole 4 is embedded in the installation groove 52. By forming an installation groove 52 on the upper insulating member 5, after the connecting portion 42 of the pole 4 is embedded in the installation groove 52, the installation groove 52 plays a role in limiting and positioning the connecting portion 42, ensuring the accuracy of the installation position.

[0058] Optionally, as Figure 2 , Figure 5 shown, a receiving groove 12 is formed on the cover plate body 1, and the upper insulating member 5 is embedded in the receiving groove 12. By forming a receiving groove 12 on the cover plate body 1, after the upper insulating member 5 is embedded in the receiving groove 12, the receiving groove 12 plays a role in limiting and positioning the upper insulating member 5, ensuring the accuracy of the installation position.

[0059] Optionally, as Figure 2 , Figure 10As shown, the battery cover plate further includes a seal 6. The seal 6 is sleeved on the connecting portion 42 of the pole column 4 and is located between the outer wall of the connecting portion 42 and the inner wall of the first mounting through hole 11. By sleeving the seal 6 on the connecting portion 42 of the pole column 4, the seal 6 insulates and seals the gap between the outer wall of the connecting portion 42 and the inner wall of the first mounting through hole 11, preventing the electrolyte in the battery from leaking out through the battery cover plate. In this embodiment, the seal 6 is an O-ring.

[0060] Optionally, as Figure 2 , Figure 10 shown, the seal 6 includes a first sealing portion 61 and a second sealing portion 62. The first sealing portion 61 is disposed between the connecting portion 42 of the pole column 4 and the cover plate body 1, and the second sealing portion 62 is disposed between the outer wall of the connecting portion 42 and the inner wall of the first mounting through hole 11. By disposing the first sealing portion 61 between the connecting portion 42 of the pole column 4 and the cover plate body 1 and the second sealing portion 62 between the outer wall of the connecting portion 42 and the inner wall of the first mounting through hole 11, the sealing coverage area is increased, improving the sealing effect. In this embodiment, the first sealing portion 61 and the second sealing portion 62 form a stepped sealing sleeve.

[0061] In this embodiment, a battery is also provided. The battery includes the above-mentioned battery cover plate. The battery further includes a battery cell pole group and a battery housing. The battery cover plate is covered on the battery housing to form an accommodation chamber for placing the battery cell pole group. By applying the above-mentioned battery cover plate, the external dimension of the battery cell pole group is increased, and the energy density of the battery is improved.

[0062] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention and are not limitations on the embodiments of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments, and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A battery cover, characterized in that: The battery cover comprises: A cover plate body (1), wherein a first mounting through hole (11) is provided on the cover plate body (1); A lower insulating member (2), the lower insulating member (2) being arranged on a side of the cover plate body (1) facing the cell electrode group, and the lower insulating member (2) is also provided with a second mounting through hole (21) communicating with the first mounting through hole (11); A conductive pin (3), the conductive pin (3) being arranged on a side of the lower insulating member (2) facing away from the cover plate body (1), the conductive pin (3) being provided with a third mounting through hole (31) communicating with the second mounting through hole (21), the third mounting through hole (31) being a tapered hole whose diameter gradually increases as it moves away from the lower insulating member (2); A pole (4), the pole (4) comprising a limiting portion (41) and a connecting portion (42), the limiting portion (41) being arranged on a side of the cover plate body (1) away from the lower insulating member (2), the connecting portion (42) being sequentially inserted into the first mounting through hole (11), the second mounting through hole (21) and the third mounting through hole (31), one end of the connecting portion (42) away from the limiting portion (41) being a cone adapted to the third mounting through hole (31), and the connecting portion (42) having the tapered end being riveted into the third mounting through hole (31) of the conductive pin (3).

2. The battery cover according to claim 1, characterized in that: The lower insulating member (2) comprises a lower insulating body (22) and a supporting portion (23), wherein the supporting portion (23) is arranged on both sides of the lower insulating body (22), the third mounting through hole (31) is provided on the lower insulating body (22), and the conductive pin (3) comprises a first pin (32) and a second pin (33), wherein the first pin (32) abuts against a side of the lower insulating body (22) facing away from the cover body (1), and the second pin (33) abuts against the supporting portion (23).

3. The battery cover according to claim 2, characterized in that: A limiting protrusion (24) surrounding the third mounting through hole (31) is provided on one side of the lower insulating body (22) facing away from the cover body (1) to form a first limiting area, and the first pin (32) is arranged in the first limiting area.

4. The battery cover according to claim 3, characterized in that: The support portion (23) is provided with a limiting groove (25) for forming a second limiting area, and the second pin (33) is embedded in the second limiting area.

5. The battery cover according to claim 1, characterized in that: The battery cover plate further comprises an upper insulating member (5), wherein the upper insulating member (5) is arranged between the connecting portion (42) of the pole (4) and the cover plate body (1), and the upper insulating member (5) is further provided with a fourth mounting through hole (51) which is in communication with the first mounting through hole (11).

6. The battery cover according to claim 5, characterized in that: The upper insulating member (5) is provided with a mounting groove (52), and the connecting portion (42) of the pole (4) is embedded in the mounting groove (52).

7. The battery cover according to claim 5, characterized in that: The cover plate body (1) is provided with a receiving groove (12), and the upper insulating member (5) is embedded in the receiving groove (12).

8. The battery cover according to claim 1, characterized in that: The battery cover plate further comprises a sealing member (6), wherein the sealing member (6) is sleeved on the connecting portion (42) of the pole (4) and is located between the outer wall of the connecting portion (42) and the inner wall of the first mounting through hole (11).

9. The battery cover according to claim 8, characterized in that: The sealing member (6) comprises a first sealing portion (61) and a second sealing portion (62), wherein the first sealing portion (61) is arranged between the connecting portion (42) of the pole (4) and the cover plate body (1), and the second sealing portion (62) is arranged between the outer wall of the connecting portion (42) and the inner wall of the first mounting through hole (11).

10. A battery, characterized in that The battery comprises the battery cover as described in any one of claims 1 to 9, and the battery also comprises the battery cell group and a battery shell, wherein the battery cover is arranged on the battery shell to form a accommodating chamber for placing the battery cell group.

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