Cover plate assembly, battery, battery pack

Abstract

This utility model discloses a cover plate assembly, a battery, and a battery pack. The cover plate assembly of this utility model includes a cover plate and terminals. The cover plate has a through-hole for mounting the terminals, which is along the thickness direction of the cover plate. The terminals pass through the through-hole and are insulated and sealed from the cover plate. Each terminal includes a terminal seat with a through-hole for mounting tabs. On the outer end face of the terminal seat, adjacent to the tab mounting hole, there is an overlapping portion for tab welding. This utility model's cover plate assembly eliminates the need to open the cover plate; simply placing the cover plate on the housing and guiding the battery cell to the bent portion of the terminal seat allows for welding of the tabs and terminals. This significantly shortens the required tab length for the battery cell, thereby reducing the space occupied by the battery cell tabs within the housing and correspondingly increasing battery density.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a cover plate assembly, a battery, and a battery pack. Background Technology

[0002] In related technologies, the battery assembly method usually involves placing the battery cell in the casing, leading the battery cell's tabs out to the outside of the casing, and connecting them to the terminals on the cover plate for welding. After welding, the cover plate is placed on the casing to seal it.

[0003] This type of cover plate assembly requires the battery cell to have a relatively long tab so that it has sufficient length to connect to the terminal post on the cover plate during the welding process. However, the long tab needs to be bent after the cover plate is welded and sealed to the housing in order to fit into the housing. On the one hand, the risk of short circuits increases due to the bent tab, resulting in a low safety factor; on the other hand, the bent tab will occupy a large space inside the housing, leading to a decrease in the energy density of the battery.

[0004] Therefore, the cover plate assembly in the relevant technology has the problem of requiring the battery cell to have a relatively long tab. Utility Model Content

[0005] This utility model provides a cover plate assembly to solve the problem that the cover plate assembly requires a long electrode tab for the battery cell, thereby shortening the length of the electrode tab required for the battery cell in the cover plate assembly.

[0006] The cover plate assembly of this utility model embodiment includes: A cover plate having a through-hole for mounting a pole post; The electrode post passes through the electrode post mounting hole, and the electrode post and the cover plate are insulated and sealed together. The pole includes a pole seat, on which a tab mounting hole is provided. On the outer end face of the pole seat, adjacent to the tab mounting hole, there is an overlap portion for tab welding.

[0007] It is understandable that during the welding of the tab, the cover plate assembly can be placed on the housing, and one end of the tab can be passed through the tab mounting hole. Then, one end of the tab is bent so that it overlaps with the overlap of the pole seat. Subsequently, the tab is welded to connect it to the pole seat, thereby achieving the effect of electrical connection between the tab and the pole.

[0008] Compared to related technologies that require opening the cover and extending the battery cell's tabs to the outside of the casing to connect the tabs to the terminals on the cover for welding, and then closing the casing by placing the cover back on it after welding, this method offers a more efficient solution.

[0009] The cover plate assembly of this utility model does not require opening the cover plate. Instead, the cover plate is simply placed on the housing, and the battery cell is led to the bending part of the terminal block so that the tab and the terminal block can be welded. This can greatly shorten the length of the tab that needs to be reserved for the battery cell, thereby reducing the space occupied by the battery cell tab in the housing and correspondingly increasing the battery density.

[0010] Therefore, the cover plate assembly of this utility model embodiment can shorten the length of the electrode tabs that need to be reserved for the battery cell.

[0011] In some embodiments, the pole post further includes a pole post cap, which is disposed on the outer end face of the pole post.

[0012] In some embodiments, the cover plate assembly of this utility model further includes a pressure block connected to the cover plate and abutting against the pole seat to fix the pole seat to the cover plate.

[0013] In some embodiments, the pole seat is disposed inside the cover plate, and the pressure block is disposed inside the cover plate.

[0014] In some embodiments, the inner side of the cover plate is provided with a first mounting groove corresponding to the mounting hole, and at least a portion of the pole post seat is disposed in the first mounting groove.

[0015] In some embodiments, an insulating sealing structure is also included, the insulating sealing structure comprising a first insulating seal and a second insulating seal; The first insulating seal is disposed between the outer end face of the pole post seat and the bottom surface of the first mounting groove; The second insulating seal is disposed between the pole seat and the pressure block, and between the outer peripheral wall of the pole seat and the inner peripheral wall of the first mounting groove.

[0016] In some embodiments, the insulating sealing structure further includes a third insulating element disposed between the pole cap and the cover plate.

[0017] In some embodiments, the pole seat is located on the outside of the cover plate, and the pressure block is located on the outside of the cover plate.

[0018] In some embodiments, a second mounting groove is provided on the outer side of the cover plate corresponding to the mounting hole, and at least a portion of the pole post seat is disposed in the second mounting groove.

[0019] In some embodiments, an insulating sealing structure is also included, the insulating sealing structure comprising a fourth insulating seal and a fifth insulating seal; The fourth insulating seal is disposed between the inner end face of the pole post seat and the bottom surface of the second mounting groove; The fifth insulating seal is disposed between the pole seat and the pressure block, and between the pressure block and the pole cap.

[0020] This utility model also provides a battery.

[0021] The battery in this embodiment of the utility model includes: A housing having a receiving cavity and an opening communicating with the receiving cavity; As described in the above embodiments, the cover plate assembly is disposed at the opening to seal the receiving cavity; The battery cell is disposed within the receiving cavity, and the battery cell includes a battery cell body and a tab. One end of the tab is connected to the battery cell body, and the other end of the tab passes through the tab mounting hole and overlaps with the overlapping part.

[0022] In some embodiments, one end of the electrode tab passes through the electrode tab mounting hole and is bent to form an overlapping section, which overlaps the overlapping portion.

[0023] In some embodiments, the length L1 of the tab mounting hole and the width L2 of the tab satisfy L1-L2=(0-20)mm; The width L3 of the electrode mounting hole and the thickness L4 of the electrode satisfy L3-L4=(0-10)mm.

[0024] This utility model also provides a battery pack.

[0025] The battery pack of this utility model embodiment includes the battery as described in the above embodiment. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the battery structure according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the cover plate assembly according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the cover plate assembly according to another embodiment of the present invention; Figure 4 This is a top view of the pole piece of this utility model embodiment; Figure 5This is a cross-sectional view of the pole seat according to an embodiment of the present utility model.

[0028] In the picture: 100. Cover plate assembly; 200. Battery; 1. Cover plate; 101. Pole post mounting hole; 2. Terminal post; 201. Terminal post seat; 2011. Terminal lug mounting hole; 2012. Overlap part; 202. Terminal post cap; 3. Pressing blocks; 4. First mounting slot; 5. Second mounting slot; 6. Insulating and sealing structure; 601. First insulating seal; 602. Second insulating seal; 603. Third insulating seal; 604. Fourth insulating seal; 605. Fifth insulating seal; 7. Shell; 701. Opening; 8. Battery cell; 801. Battery cell body; 802. Electrode tab; 8021. Connecting section. Detailed Implementation

[0029] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0030] In the description of this utility model, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal encapsulation of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] In order to solve the problem that the cover plate assembly 100 requires the battery cell 8 to reserve a long tab 802, the length of the tab 802 required by the battery cell 8 in the cover plate assembly 100 is shortened.

[0033] This utility model provides a cover plate assembly 100.

[0034] The cover plate assembly 100 of this utility model embodiment includes a cover plate 1 and a pole post 2.

[0035] like Figure 2 and 3 As shown, the cover plate 1 has a through-hole 101 for mounting the pole post, which is along the thickness direction of the cover plate 1.

[0036] The pole post 2 passes through the pole post mounting hole 101, and the pole post 2 and the cover plate 1 are insulated and sealed.

[0037] It is understandable that, in order to avoid short circuits in battery 200, the terminal 2 and the cover plate 1 should have good insulation and sealing performance.

[0038] The pole post 2 includes a pole post seat 201, on which a tab mounting hole 2011 is provided. On the outer end face of the pole post seat 201, adjacent to the tab mounting hole 2011, there is an overlap portion 2012 for welding the tab 802.

[0039] It is understandable that during the welding of tab 802, cover plate assembly 100 can be placed on housing 7, and one end of tab 802 can be passed through tab mounting hole 2011. Then, one end of tab 802 can be bent so that one end of tab 802 overlaps with the overlap portion 2012 of pole post 201. Subsequently, tab 802 can be welded to connect it to pole post 201, thereby achieving the effect of electrical connection between tab 802 and pole post 2.

[0040] Compared to related technologies, which require opening the cover plate 1 and leading the tab 802 of the battery cell 8 to the outside of the housing 7 so that the tab 802 can be connected to the terminal post 2 on the cover plate 1 for welding, and after welding, the cover plate 1 needs to be placed on the housing 7 to close the housing 7.

[0041] The cover plate assembly 100 of this utility model embodiment does not require opening the cover plate 1. Instead, the cover plate 1 is simply placed on the housing 7, and the battery cell 8 is led to the bending part of the terminal block 201 so that the tab 802 and the terminal block 2 can be welded. This can greatly shorten the length of the tab 802 that needs to be reserved for the battery cell 8, thereby reducing the space occupied by the tab 802 of the battery cell 8 in the housing 7, and correspondingly increasing the density of the battery 200.

[0042] Therefore, the cover plate assembly 100 of this utility model embodiment can shorten the length of the tab 802 that needs to be reserved for the battery cell 8.

[0043] In some embodiments, the pole post 2 further includes a pole post cap 202, which is disposed on the outer end face of the pole post 2.

[0044] The cover plate assembly 100 of this utility model embodiment, by providing the terminal cap 202, facilitates the electrical connection between external devices and the terminal seat 201, thereby facilitating the charging and discharging of the battery 200 having the cover plate assembly 100 of this utility model embodiment.

[0045] In some embodiments of the present invention, the cover plate assembly 100 further includes a pressing block 3, which is connected to the cover plate 1 and abuts against the pole post seat 201 to fix the pole post seat 201 on the cover plate 1.

[0046] Optionally, the pressure block 3 can be a single block, which extends along the circumference of the pole seat 201, thus more stably fixing the pole seat 201 to the cover plate 1.

[0047] Optionally, there can be multiple pressure blocks 3, which are spaced apart along the circumference of the pole seat 201 to more stably fix the pole seat 201 to the cover plate 1.

[0048] It is understandable that the pressure block 3 can be made of metal. Since the pressure block 3 is connected to the cover plate 1, in order to avoid short circuit between the electrode holder 201 and the cover plate 1, the pressure block 3 and the electrode holder 201 should also be insulated.

[0049] In some embodiments, such as Figure 2 As shown, the pole seat 201 is located inside the cover plate 1, and the pressure block 3 is located inside the cover plate 1.

[0050] Furthermore, the inner side of the cover plate 1 is provided with a first mounting groove 4 corresponding to the mounting hole, and at least part of the pole post seat 201 is provided in the first mounting groove 4.

[0051] In other words, some of the pole posts 201 can be located in the first mounting groove 4, or all of the pole posts 201 can be located in the first mounting groove 4. The specific arrangement can be determined according to the actual assembly requirements.

[0052] Furthermore, it also includes an insulating sealing structure 6, which includes a first insulating seal 601 and a second insulating seal 602; The first insulating seal 601 is disposed between the outer end face of the pole post seat 201 and the bottom surface of the first mounting groove 4; the second insulating seal 602 is disposed between the pole post seat 201 and the pressure block 3, and between the outer peripheral wall of the pole post seat 201 and the inner peripheral wall of the first mounting groove 4.

[0053] Optionally, the first insulating seal 601 is provided to extend circumferentially around the pole post seat 201; Optionally, the second insulating seal 602 is provided to extend circumferentially around the pole post seat 201.

[0054] The cover plate assembly 100 of this utility model embodiment can provide insulation and sealing between the pole post seat 201 and the cover plate 1 by setting the insulating sealing structure 6 as the first insulating sealing element 601 and the second insulating sealing element 602, and can also provide insulation between the pole post seat 201 and the pressure block 3, thereby greatly improving the insulation and sealing performance of the cover plate assembly 100 of this utility model embodiment.

[0055] Furthermore, the insulating sealing structure 6 also includes a third insulating element, which is disposed between the pole cap 202 and the cover plate 1.

[0056] Optionally, the third insulating seal 603 extends circumferentially around the pole post seat 201; It is understandable that placing a third insulating element between the pole cap 202 and the cover plate 1 can prevent a short circuit between the pole cap 202 and the cover plate 1.

[0057] Therefore, the provision of a third insulating element between the pole cap 202 and the cover plate 1 in the cover plate assembly 100 of this utility model embodiment can greatly improve the safety of the cover plate assembly 100 of this utility model embodiment.

[0058] In some embodiments, such as Figure 3 As shown, the pole seat 201 is located on the outside of the cover plate 1, and the pressure block 3 is located on the outside of the cover plate 1.

[0059] Furthermore, a second mounting groove 5 is provided on the outer side of the cover plate 1 corresponding to the mounting hole, and at least part of the pole post seat 201 is provided in the second mounting groove 5.

[0060] In other words, some of the pole posts 201 can be located in the second mounting slot 5, or all of the pole posts 201 can be located in the second mounting slot 5. The specific arrangement can be determined according to the actual assembly requirements.

[0061] Furthermore, it also includes an insulating sealing structure 6, which includes a fourth insulating seal 604 and a fifth insulating seal 605; the fourth insulating seal 604 is disposed between the inner end face of the pole post seat 201 and the bottom surface of the second mounting groove 5; the fifth insulating seal 605 is disposed between the pole post seat 201 and the pressure block 3 and between the pressure block 3 and the pole post cap 202.

[0062] Optionally, the fourth insulating seal 604 is provided to extend circumferentially around the pole post seat 201; Optionally, the fifth insulating seal 605 is provided to extend circumferentially around the pole post seat 201.

[0063] The cover plate assembly 100 of this utility model embodiment, by setting the insulating sealing structure 6 as the fourth insulating sealing element 604 and the fifth insulating sealing element 605, can provide insulation and sealing between the pole post seat 201 and the cover plate 1, can provide insulation between the pole post seat 201 and the pressure block 3, and can also provide insulation between the pole post cap 202 and the pressure block 3, thereby greatly improving the insulation and sealing performance of the cover plate assembly 100 of this utility model embodiment.

[0064] This utility model embodiment also provides a battery 200.

[0065] The battery of this utility model embodiment includes a casing 7, a cover plate assembly 100 as described in the above embodiment, and a battery cell 8.

[0066] The housing 7 has a receiving cavity and an opening 701 communicating with the receiving cavity. A cover plate 1 is provided at the opening 701 to seal the receiving cavity. The battery cell 8 is provided in the receiving cavity and includes a battery cell body 801 and a tab 802. One end of the tab 802 is connected to the battery cell body 801, and the other end of the tab 802 passes through the tab mounting hole 2011 and overlaps with the overlap portion 2012.

[0067] It is understandable that during the welding of tab 802, cover plate assembly 100 can be placed on housing 7, and one end of tab 802 can be passed through tab mounting hole 2011. Then, one end of tab 802 can be bent so that one end of tab 802 overlaps with the overlap portion 2012 of pole post 201. Subsequently, tab 802 can be welded to connect it to pole post 201, thereby achieving the effect of electrical connection between tab 802 and pole post 2.

[0068] Compared to the battery 200 in related technologies, which requires opening the cover plate 1 and leading the tab 802 of the cell 8 to the outside of the housing 7 during assembly so that the tab 802 can be connected to the terminal post 2 on the cover plate 1 for welding, and after welding, the cover plate 1 needs to be placed on the housing 7 to close the housing 7.

[0069] In this embodiment of the present invention, the battery 200 does not require opening the cover plate 1 during assembly. Instead, the cover plate 1 is simply placed on the housing 7, and the battery cell 8 is led to the bent part of the terminal block 201 so that the tab 802 and the terminal block 2 can be welded. This can greatly shorten the length of the tab 802 that needs to be reserved for the battery cell 8, thereby reducing the space occupied by the tab 802 of the battery cell 8 in the housing 7, and correspondingly increasing the density of the battery 200.

[0070] Therefore, the battery 200 of this utility model embodiment can shorten the length of the tab 802 reserved for the required battery cell 8.

[0071] In some embodiments, one end of the tab 802 passes through the tab mounting hole 2011 and is bent to form an overlapping section 8021, which overlaps with the overlapping portion 2012.

[0072] In some embodiments, as shown in the figure, the length L1 of the tab mounting hole 2011 and the width L2 of the tab 802 satisfy L1-L2=(0-20)mm; By ensuring that the length L1 of the tab mounting hole 2011 and the width L2 of the tab 802 satisfy L1-L2=(0-20)mm, the tab 802 can pass smoothly through the tab mounting hole 2011, and thus the tab 802 can be installed.

[0073] As shown in the figure, the width L3 of the tab mounting hole 2011 and the thickness L4 of the tab 802 satisfy L3-L4=(0-10)mm.

[0074] By ensuring that the width L3 of the tab mounting hole 2011 and the thickness L4 of the tab 802 satisfy L3-L4=(0-10)mm, the tab 802 can pass smoothly through the tab mounting hole 2011, and thus the tab 802 can be installed.

[0075] This utility model also provides a battery pack.

[0076] The battery pack of this utility model embodiment includes the battery 200 as described in the above embodiment.

[0077] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A cover assembly, characterized by include: Cover plate (1), the cover plate (1) having a pole mounting hole (101) through it; The pole (2) is inserted through the pole mounting hole (101) and is insulated and sealed with the cover plate (1); The pole post (2) includes a pole post seat (201), which has a through-hole (2011) for mounting the tab (802). On the outer end face of the pole post seat (201), adjacent to the tab mounting hole (2011), there is an overlap (2012) for welding the tab (802).

2. The cover plate assembly of claim 1, wherein, The pole post (2) also includes a pole post cap (202), which is disposed on the outer end face of the pole post (2).

3. The cover plate assembly of claim 2, wherein, It also includes a pressure block (3), which is connected to the cover plate (1) and abuts against the pole seat (201) to fix the pole seat (201) on the cover plate (1).

4. The cover plate assembly of claim 3, wherein, The pole seat (201) is located inside the cover plate (1), and the pressure block (3) is located inside the cover plate (1).

5. The cover plate assembly of claim 4, wherein, The inner side of the cover plate (1) is provided with a first mounting groove (4) corresponding to the mounting hole, and at least part of the pole post seat (201) is provided in the first mounting groove (4).

6. The cover plate assembly of claim 5, wherein, It also includes an insulating sealing structure (6), which includes a first insulating seal (601) and a second insulating seal (602). The first insulating seal (601) is disposed between the outer end face of the pole post seat (201) and the bottom surface of the first mounting groove (4); The second insulating seal (602) is disposed between the pole seat (201) and the pressure block (3), and between the outer peripheral wall of the pole seat (201) and the inner peripheral wall of the first mounting groove (4).

7. The cover plate assembly of claim 6, wherein, The insulating sealing structure (6) further includes a third insulating sealing element (603), which is disposed between the pole cap (202) and the cover plate (1).

8. The cover plate assembly of claim 3, wherein, The pole seat (201) is located on the outside of the cover plate (1), and the pressure block (3) is located on the outside of the cover plate (1).

9. The cover plate assembly of claim 8, wherein, The cover plate (1) has a second mounting groove (5) on the outer side corresponding to the mounting hole, and at least part of the pole post seat (201) is located in the second mounting groove (5).

10. The cover plate assembly of claim 9, wherein, It also includes an insulating sealing structure (6), which includes a fourth insulating seal (604) and a fifth insulating seal (605). The fourth insulating seal (604) is disposed between the inner end face of the pole post seat (201) and the bottom surface of the second mounting groove (5); The fifth insulating seal (605) is disposed between the pole seat (201) and the pressure block (3) and between the pressure block (3) and the pole cap (202).

11. A battery, characterized by include: The housing (7) has a receiving cavity and an opening (701) communicating with the receiving cavity. The cover plate assembly (100) as claimed in any one of claims 1-10, wherein the cover plate (1) is disposed at the opening (701) to seal the receiving cavity; The battery cell (8) is disposed in the receiving cavity, and the battery cell (8) includes a battery cell body (801) and a tab (802). One end of the tab (802) is connected to the battery cell body (801), and the other end of the tab (802) passes through the tab mounting hole (2011) and overlaps the overlapping part (2012).

12. The battery of claim 11, wherein, One end of the tab (802) passes through the tab mounting hole (2011) and is bent to form an overlapping section (8021), which overlaps the overlapping part (2012).

13. The battery of claim 11, wherein, The length L1 of the electrode mounting hole (2011) and the width L2 of the electrode (802) satisfy L1-L2=(0-20)mm; The width L3 of the tab mounting hole (2011) and the thickness L4 of the tab (802) satisfy L3-L4=(0-10)mm.

14. A battery pack, characterized by Includes the battery (200) as described in any one of claims 11-13.

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