CN219642966U - End cover assembly, battery and power utilization device - Google Patents

Abstract

The utility model discloses an end cover assembly, a battery and an electric device, wherein the end cover assembly is suitable for being covered at an opening end of a battery shell and comprises a first end cover and a first current collecting disc, the first current collecting disc is suitable for being electrically connected with the first end cover, one of the first end cover and the first current collecting disc is provided with an adjusting groove, and a part of the other one of the first end cover and the first current collecting disc is suitable for being accommodated in the adjusting groove and is connected with the inner peripheral wall of the adjusting groove. According to the end cover assembly provided by the embodiment of the utility model, in the process of assembling the battery, the end cover assembly can adjust the height of one of the pole post and the first current collecting disc to extend into the adjusting groove according to the height of the pole core of the battery, so that the influence of the height fluctuation of the pole core on the assembly of the battery can be counteracted, the normal assembly of the battery can be still ensured under the condition that the height of the pole core fluctuates, and the other one of the first end cover and the first current collecting disc is connected with the inner peripheral wall of the adjusting groove, so that the electric connection between the first current collecting disc and the pole post can be realized.

Description

End cover assembly, battery and power utilization device

Technical Field

The utility model relates to the field of batteries, in particular to an end cover assembly, a battery and an electric device.

Background

In the related art, due to fluctuation of mechanical equipment, the height of the pole core is inevitably inconsistent in the process of preparing the pole core. However, in the process of assembling the pole core, the upper end face of the current collecting disc is usually welded with the lower end face of the end cover, so that the position reserved for the pole core in the battery is limited due to the assembling mode, and when the height of the pole core is too large, the pole core can not be completely accommodated in the battery shell, and the subsequent assembly can not be performed; when the height of the pole core is too small, the current collecting plate may not be electrically connected to the pole or the end cap. Therefore, the above-mentioned problems are to be solved.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide an end cap assembly in which an adjusting groove is provided in one of a first end cap and a first collecting plate, a portion of the other of the first end cap and the first collecting plate is received in the adjusting groove and is connected to an inner circumferential wall of the adjusting groove, and in the process of assembling a battery, the height of one of the first end cap and the first collecting plate extending into the adjusting groove can be adjusted according to the height of a pole core, so that the influence of the fluctuation of the height of the pole core on the assembly of the battery can be offset, and thus the normal assembly of the battery can be ensured in the case of an error in the height of the pole core; and, through the connection of the other one of first end cover and first current collection dish with the inner peripheral wall of adjustment tank, can realize the electrical connection of first current collection dish and first end cover.

The utility model also provides a battery with the end cover assembly.

The utility model also provides an electric device with the battery.

According to the end cover assembly, the end cover assembly is suitable for being covered at the opening end of the battery shell, the end cover assembly comprises a first end cover and a first current collecting disc, the first current collecting disc is suitable for being electrically connected with the first end cover, one of the first end cover and the first current collecting disc is provided with an adjusting groove, and a part of the other one of the first end cover and the first current collecting disc is suitable for being accommodated in the adjusting groove and is connected with the inner peripheral wall of the adjusting groove.

According to the end cover assembly provided by the embodiment of the utility model, the adjusting groove is formed in one of the first end cover and the first current collecting disc, and a part of the other one of the first end cover and the first current collecting disc is accommodated in the adjusting groove and is connected with the inner peripheral wall of the adjusting groove; and, through the connection of the other one of first end cover and first current collection dish with the inner peripheral wall of adjustment tank, can realize the electrical connection of first current collection dish and first end cover.

According to some embodiments of the utility model, the adjusting groove is formed on one side of the first end cover facing the first current collecting plate, the first current collecting plate comprises a first current collecting plate body and a first extension part, the first current collecting plate body is suitable for being connected with a pole core of a battery, the first extension part protrudes out of the first current collecting plate body towards the direction adjacent to the first end cover, and at least part of the first extension part is accommodated in the adjusting groove and is connected with the inner peripheral wall of the adjusting groove.

According to some alternative embodiments of the utility model, the outer surface of the first end cap remote from the first current collecting plate is a first end cap outer surface, and the first extension does not protrude from the first end cap outer surface.

According to some alternative embodiments of the utility model, the first extension is welded to the inner peripheral wall of the adjustment slot.

According to some alternative embodiments of the utility model, a first welding gap is arranged between the outer peripheral wall of the first extension part and the inner peripheral wall of the adjusting groove, and the width of the first welding gap ranges from 0 mm to 0.2mm.

According to some alternative embodiments of the utility model, the end cap assembly includes a blocking member, the adjustment slot penetrates the first end cap along a thickness direction of the first end cap, and the first extension portion is formed with a liquid injection hole, and the blocking member is used for blocking the liquid injection hole.

According to some alternative embodiments of the present utility model, the end cap assembly further comprises a sealing tab covering a side of the blocking member remote from the first current collecting plate.

According to some alternative embodiments of the present utility model, the blocking member includes a blocking portion penetrating the liquid injection hole and adapted to seal the liquid injection hole, and a sealing flange connected to an outer peripheral wall of the blocking portion and located on a side of the first extension portion away from the first collecting tray.

According to some alternative embodiments of the present utility model, the blocking member further includes a limiting protrusion formed on an outer circumferential wall of the blocking portion and located at an end of the liquid injection hole adjacent to the first collecting tray, the limiting protrusion being adapted to abut against the first extension portion to limit the blocking member.

According to some alternative embodiments of the utility model, the sealing cuff abuts or is connected with the first extension.

According to some alternative embodiments of the present utility model, the adjusting groove is formed into a stepped hole, the stepped hole includes a first hole section and a second hole section which are mutually communicated, the second hole section is located on a side of the first hole section away from the first collecting tray, an inner diameter of the second hole section is larger than an inner diameter of the first hole section, at least part of the first extending portion is accommodated in the first hole Duan Ju and is welded to an inner peripheral wall of the first hole section, at least part of the sealing flange is accommodated in the second hole section, a bottom wall of the second hole section forms a first stepped surface, and the sealing flange is located on a side of the first stepped surface away from the first collecting tray and is abutted or connected with the first stepped surface.

According to some alternative embodiments of the present utility model, the end cap assembly further comprises a sealing plate covering a side of the blocking member remote from the first current collecting plate, the adjustment slot further comprises a third hole section located at a side of the second hole section remote from the first hole section, and at least a portion of the sealing plate is received in the third hole section.

According to some alternative embodiments of the utility model, the sealing plate is seam welded to the inner peripheral wall of the third bore section.

According to some alternative embodiments of the utility model, a second welding gap is provided between the outer peripheral wall of the sealing piece and the inner peripheral wall of the third hole section, and the width of the second welding gap ranges from 0 mm to 0.2mm.

According to some alternative embodiments of the utility model, the outer surface of the sealing sheet is formed with a first groove adjacent to the peripheral edge of the sealing sheet and penetrating the peripheral wall of the sealing sheet, the outer surface of the first end cap is formed with a second groove adjacent to the third hole section and penetrating the inner peripheral wall of the third hole section, the first groove and the second groove are opposite and communicated, and the first groove and the second groove jointly form a first accommodating groove.

According to some alternative embodiments of the utility model, the first extension is a convex hull formed by a portion of the first current collecting plate protruding away from the core of the battery.

According to some embodiments of the utility model, the first end cap is formed with a detonation proof hole, the detonation proof hole is covered with a detonation proof sheet, and the detonation proof sheet is smaller than the first end cap in thickness.

According to a battery of an embodiment of the second aspect of the present utility model, the battery includes: a battery case;

the pole core is arranged in the shell;

the first end cover assembly and the second end cover assembly are arranged on two opposite sides of the shell, the first end cover assembly is the end cover assembly of the embodiment of the first aspect of the utility model, the first current collecting disc is electrically connected with the pole core, and the second end cover assembly is electrically connected with the pole core.

According to the battery provided by the embodiment of the utility model, the influence of the fluctuation of the height of the pole core on the assembly of the battery can be counteracted by arranging the end cover assembly, so that the normal assembly of the battery can be ensured under the condition that the height of the pole core fluctuates.

According to some embodiments of the utility model, the second end cap assembly comprises a second end cap, a pole column and a second current collecting disc, wherein the pole column is arranged on the second end cap and is provided with an insulating structure with the second end cap, the second current collecting disc is electrically connected with the pole column and the pole core, the second current collecting disc comprises a second current collecting disc body and a second extension part, the second current collecting disc body is connected with the pole core, the second extension part protrudes out of the second current collecting disc body towards the direction adjacent to the second end cap, and the second extension part is connected with the pole column.

According to some alternative embodiments of the present utility model, the pole includes a pole body and a pole extension portion, the pole extension portion surrounds the outer peripheral side of the pole body, the pole body is arranged on the second end cover in a penetrating manner, the pole body is welded to the second extension portion, a second accommodating groove is formed on a side, facing away from the second extension portion, of the pole body, and a welding area between the pole body and the second extension portion is opposite to the second accommodating groove.

According to some alternative embodiments of the present utility model, the second end cap, the insulating structure and the pole are formed integrally by thermal compounding or bonding; or, the insulation structure is integrally injection-molded between the second end cover and the pole.

According to some embodiments of the utility model, the first end cap is integrally formed with the housing, and the second end cap is separately formed from the housing; or the first end cover, the second end cover and the shell are respectively and independently molded.

An electrical device according to an embodiment of the third aspect of the present utility model includes: a battery according to an embodiment of the above second aspect of the present utility model.

According to the power utilization device provided by the embodiment of the utility model, the normal power utilization of the power utilization device is ensured by arranging the battery.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a cross-sectional view of a battery according to some embodiments of the utility model;

fig. 2 is an exploded view of the battery of fig. 1;

fig. 3 is a perspective view of a first current collecting plate of the battery of fig. 1;

fig. 4 is a perspective view of a first end cap of the cell of fig. 1;

Fig. 5 is a cross-sectional view of a first end cap of the cell of fig. 1;

FIG. 6 is an enlarged view at A in FIG. 1;

fig. 7 is an enlarged view at B in fig. 1.

Reference numerals:

1. a battery;

10. a battery case; 11. a pole core;

12. a first end cap assembly;

120. a first end cap; 121. an adjustment tank; 122. a first bore section; 123. a second bore section; 124. a first step surface; 125. a third bore section; 126. explosion-proof holes; 127. a second groove;

128. a first collecting tray; 129. a first collecting tray body; 130. a first extension; 131. a liquid injection hole; 132. a first surface; 133. a second surface;

14. explosion-proof sheet; 140. explosion-proof nicks;

15. a second end cap assembly;

150. a second end cap; 151. a first through hole;

152. a pole; 153. a pole body; 154. a pole extension;

155. a second collecting tray; 156. a second current collecting tray body; 157. a second extension;

158. an insulating structure,

159. A first insulating member; 160. a second through hole;

161. a second insulating member; 162. a third through hole;

17. a first weld; 170. a first welding gap; 18. a second weld; 180. a second welding gap;

19. a blocking member; 191. a blocking part; 192. sealing and flanging; 193. a limit protrusion;

20. A sealing sheet; 200. a first groove;

21. a third weld; 22. a welding region; 23. a first accommodating groove.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

An end cap assembly according to an embodiment of the present utility model is described below with reference to fig. 1-7.

As shown in fig. 1-6, the end cap assembly according to the embodiment of the present utility model is adapted to be disposed over the open end of the battery case 10, and includes a first end cap 120 and a first current collecting plate 128, the first current collecting plate 128 being electrically connected to the first end cap 120. One of the first end cap 120 and the first collecting tray 128 is formed with an adjustment groove 121, and a portion of the other of the first end cap 120 and the first collecting tray 128 is received in the adjustment groove 121 and is connected with an inner peripheral wall of the adjustment groove 121.

During the preparation of the pole piece 11, the height of the pole piece 11 may be non-uniform due to mechanical equipment fluctuations.

For example, the first end cap 120 is formed with an adjustment groove 121, and a portion of the first collecting tray 128 is received in the adjustment groove 121 and is coupled with an inner circumferential wall of the adjustment groove 121. When the height of the electrode core 11 is excessively large, the portion of the first current collecting plate 128 accommodated in the adjustment groove 121 increases, the height L1 of the first current collecting plate 128 extending into the adjustment groove 121 increases, the position of the first current collecting plate 128 located inside the case 10 is also closer to the first end cap 120, so that the height of the position of the battery 1 left to the electrode core 11 increases, normal assembly of the battery 1 can be ensured, and the first current collecting plate 128 is connected with the inner peripheral wall of the adjustment groove 121, electrical connection of the first current collecting plate 128 with the first end cap 120 can be achieved, and the reliability of electrical connection of the first current collecting plate 128 with the first end cap 120 can be improved by means of welded connection.

When the height of the electrode core 11 is excessively small, the portion of the first current collecting plate 128 accommodated in the adjustment groove 121 is reduced, the height L1 of the first current collecting plate 128 extending into the adjustment groove 121 is reduced, the position of the first current collecting plate 128 located inside the case 10 is also further away from the first end cap 120, so that the height of the position of the battery 1 left to the electrode core 11 is reduced, normal assembly of the battery 1 can be ensured, the first current collecting plate 128 can be electrically connected with the electrode core 11 normally, and the first current collecting plate 128 is connected with the inner peripheral wall of the adjustment groove 121, and electrical connection of the first current collecting plate 128 and the first end cap 120 can be achieved.

Therefore, the first current collecting plate 128 can adjust the amount of the portion accommodated in the adjusting groove 121 according to the height of the pole core 11, the height L1 of the first current collecting plate 128 extending into the adjusting groove 121 can be changed, so that the height of the first current collecting plate 128 at the position inside the housing 10 can be adjusted, the influence of the height of the pole core 11 on the assembly of the battery 1 can be counteracted, the normal assembly of the battery 1 can be ensured even if the height of the pole core 11 is in error, and the electrical connection between the first current collecting plate 128 and the first end cover 120 can be realized by connecting the first current collecting plate 128 with the inner peripheral wall of the adjusting groove 121.

For another example, the first collecting tray 128 is formed with an adjustment groove 121, and a portion of the first end cap 120 is received in the adjustment groove 121 and is connected to an inner circumferential wall of the adjustment groove 121.

When the height of the pole core 11 is excessively large, the portion of the first end cap 120 accommodated in the adjustment groove 121 increases, the height L1 of the first end cap 120 extending into the adjustment groove 121 increases, the position of the first collecting tray 128 located inside the case 10 is also closer to the first end cap 120, so that the height of the position of the pole core 11 left inside the battery 1 increases, thereby ensuring normal assembly of the battery 1, and the first end cap 120 is connected with the inner peripheral wall of the adjustment groove 121, and electrical connection of the first collecting tray 128 and the first end cap 120 can be achieved.

When the height of the electrode core 11 is excessively small, the portion of the first end cap 120 accommodated in the adjustment groove 121 is reduced, the height of the first end cap 120 extending into the adjustment groove 121 is reduced, the position of the first current collecting plate 128 located inside the housing 10 is also further away from the first end cap 120, so that the height of the position of the battery 1 left to the electrode core 11 is reduced, normal assembly of the battery 1 can be ensured, the first current collecting plate 128 can be electrically connected with the electrode core 11 normally, and the first end cap 120 is connected with the inner peripheral wall of the adjustment groove 121, so that electrical connection of the first current collecting plate 128 and the first end cap 120 can be realized.

Therefore, the first end cap 120 can adjust the height of the portion accommodated in the adjustment groove 121 according to the height of the pole core 11, the height of the first end cap 120 extending into the adjustment groove 121 can be changed, so that the height of the first collecting tray 128 at the position inside the housing 10 can be adjusted, the influence of the height of the pole core 11 on the assembly of the battery 1 can be counteracted, the normal assembly of the battery 1 can be ensured even if the height of the pole core 11 is in error, and the electrical connection between the first collecting tray 128 and the first end cap 120 can be realized by connecting the first end cap 120 with the inner peripheral wall of the adjustment groove 121.

According to the end cap assembly of the embodiment of the present utility model, referring to fig. 1 and 6, by providing the adjustment groove 121 on one of the first end cap 120 and the first current collecting plate 128, a portion of the other one of the first end cap 120 and the first current collecting plate 128 is received in the adjustment groove 121 and is connected with the inner circumferential wall of the adjustment groove 121, and in the process of assembling the battery 1, the height of one of the first end cap 120 and the first current collecting plate 128 protruding into the adjustment groove 121 can be adjusted according to the height of the pole core 11, so that the influence of the fluctuation of the height of the pole core 11 on the assembly of the battery 1 can be counteracted, so that the normal assembly of the battery 1 can be ensured in the case of the fluctuation of the height of the pole core 11; also, the electrical connection of the first collecting plate 128 with the first end cap 120 may be achieved by connecting the other one of the first end cap 120 and the first collecting plate 128 with the inner circumferential wall of the adjustment groove 121.

According to some embodiments of the present utility model, referring to fig. 1 and 6, an adjustment groove 121 is formed at a side of the first end cap 120 facing the first current collecting plate 128, the first current collecting plate 128 includes a first current collecting plate body 129 and a first extension 130, the first current collecting plate body 129 is adapted to be connected with the electrode core 11 of the battery, the first extension 130 protrudes from the first current collecting plate body 129 toward a direction adjacent to the first end cap 120, and at least a portion of the first extension 130 is received in the adjustment groove 121 and is connected with an inner circumferential wall of the adjustment groove 121. For example, the first extension 130 is entirely accommodated in the adjustment groove 121 and is connected to the inner peripheral wall of the adjustment groove 121; for another example, a portion of the first extension 130 is received in the adjustment groove 121 and is connected to an inner peripheral wall of the adjustment groove 121.

When the height of the pole core 11 is excessively large, the portion of the first extension 130 accommodated in the adjustment groove 121 increases, the height L1 of the first extension 130 extending into the adjustment groove 121 increases, the position of the first current collecting plate body 129 located inside the battery case 10 is also closer to the first end cover 120, so that the height of the position of the battery 1 left to the pole core 11 is increased, normal assembly of the battery 1 can be ensured, and the first extension 130 is connected with the inner peripheral wall of the adjustment groove 121, so that electrical connection of the first current collecting plate 128 and the first end cover 120 can be realized.

When the height of the electrode core 11 is excessively small, the portion of the first extension 130 accommodated in the adjustment groove 121 is reduced, the height of the first extension 130 extending into the adjustment groove 121 is reduced, the position of the first current collecting plate body 129 located inside the battery case 10 is also further away from the first end cover 120, so that the height of the position of the electrode core 11 left inside the battery 1 is reduced, normal assembly of the battery 1 can be ensured, the first current collecting plate 128 can be electrically connected with the electrode core 11 normally, and the first extension 130 is connected with the inner peripheral wall of the adjustment groove 121, so that electrical connection of the first current collecting plate 128 and the first end cover 120 can be realized.

Therefore, by providing the first collecting tray 128 to include the first extension 130, at least part of the first extension 130 is received in the adjustment groove 121 and is welded to the inner circumferential wall of the adjustment groove 121, the height of the first extension 130 extending into the adjustment groove 121 can be adjusted according to the height of the pole core 11 during the assembly of the battery 1, so that the influence of the height fluctuation of the pole core 11 on the assembly of the battery 1 can be counteracted, and thus, the normal assembly of the battery 1 can be ensured even if the height of the pole core 11 fluctuates.

According to some alternative embodiments of the present utility model, referring to fig. 1 and 6, the outer surface of first end cap 120 remote from first current collecting plate 128 is a first end cap outer surface, and first extension 130 does not protrude from the first end cap outer surface. By providing the first extension 130 so as not to protrude from the outer surface of the first end cap, the overall height of the battery 1 is not affected, thereby facilitating subsequent assembly of the battery 1 into a battery pack or battery pack.

According to some embodiments of the present utility model, referring to fig. 1 and 6, the first extension 130 is welded to the inner circumferential wall of the adjustment groove 121. This arrangement can make the connection between the first extension 130 and the inner peripheral wall of the adjustment tank 121 more firm and reliable, can make the electrical connection between the first extension 130 and the inner peripheral wall of the adjustment tank 121 more stable, and can facilitate the connection between the first extension 130 and the inner peripheral wall of the adjustment tank 121 by means of welded connection.

According to some alternative embodiments of the present utility model, referring to fig. 1 and 6, a first welding slit 170 is provided between an outer circumferential wall of the first extension 130 and an inner circumferential wall of the adjustment groove 121, and a width of the first welding slit 170 ranges from 0 to 0.2mm. The outer peripheral wall of the first extension 130 and the inner peripheral wall of the adjustment groove 121 are welded to form a first welding seam 17, the first welding seam 17 is located in the first welding seam 170, when the width of the first welding seam 170 is too large, blank welding or false welding is easy to occur, welding performance between the first extension 130 and the adjustment groove 121 cannot be guaranteed, electric connection between the first extension 130 and the adjustment groove 121 can be affected, an appropriate width range is provided for the first welding seam 170, welding performance between the first extension 130 and the adjustment groove 121 can be guaranteed within the range, and normal electric connection between the first extension 130 and the adjustment groove 121 can be achieved.

According to some embodiments of the present utility model, referring to fig. 1-6, the cap assembly includes a blocking member 19, the adjustment slot 121 penetrates the first end cap 120 in a thickness direction of the first end cap 120, the first extension 130 is formed with a liquid injection hole 131, and the blocking member 19 is used to block the liquid injection hole 131. At least a portion of the first extension 130 is received in the adjustment tank 121, and electrolyte may be injected from the adjustment tank 121 into the interior of the battery 1 through the first extension 130. The blocking piece 19 can seal the liquid injection hole 131 to prevent the electrolyte leakage of the battery 1.

According to some alternative embodiments of the present utility model, referring to fig. 1, 2 and 6, the end cap assembly further comprises a sealing piece 20, the sealing piece 20 being arranged to cover the side of the blocking piece 19 remote from the pole piece 11. The sealing piece 20 can play a certain sealing and limiting role on the plugging piece 19, and can prevent the plugging piece 19 from separating from the liquid injection hole 131, so that the liquid injection hole 131 is further sealed, and the sealing effect of the plugging piece 19 is better.

According to some alternative embodiments of the present utility model, referring to fig. 1, 2 and 6, the blocking member 19 includes a blocking portion 191 and a sealing flange 192, wherein the blocking portion 191 is disposed through the injection hole 131 and adapted to seal the injection hole 131, for example, the blocking portion 191 is in interference fit with the injection hole 131, which may enable the blocking portion 191 of the blocking member 19 to be more tightly fitted with the injection hole 131. The sealing flange 192 is connected to the peripheral wall of the blocking portion 191 and is located at one side, far away from the first current collecting disc 128, of the first extending portion 130, and can seal one side, far away from the pole core 11, of the first extending portion 130, further seal the liquid injection hole 131, the sealing effect of the blocking piece 19 on the liquid injection hole 131 is good due to the arrangement, and the sealing flange 192 can play a limiting role on the blocking piece 19, so that the blocking piece 19 can be prevented from moving towards the direction close to the pole core 11.

According to some alternative embodiments of the present utility model, referring to fig. 1, 2 and 6, the blocking member 19 further includes a limiting protrusion 193, the limiting protrusion 193 being formed on an outer circumferential wall of the blocking portion 191 and located at an end of the first extension 130 adjacent to the first collecting tray 128, the limiting protrusion 193 being adapted to abut the first extension 130 to limit the blocking member 19. The limiting protrusion 193 can seal one side of the first extension 130 adjacent to the pole core 11, so as to further seal the liquid injection hole 131, improve the sealing performance of the battery 1, and the limiting protrusion 193 is suitable for abutting against the first extension 130 to limit the blocking piece 19, so that the blocking piece 19 can be prevented from moving in a direction away from the pole core 11. For example, the first extension portion 130 has a first surface 132 and a second surface 133 that are disposed opposite to each other in the thickness direction of the first end cap 120, the first surface 132 is located on a side of the second surface 133 near the sealing flange 192, the liquid injection hole 131 penetrates the first surface 132 and the second surface 133, and the limit protrusion 193 is located on a side of the second surface 133 away from the first surface 132 and opposite to the second surface 133 in the thickness direction of the first end cap 120.

According to some alternative embodiments of the present utility model, referring to fig. 1, 2 and 6, a sealing cuff 192 abuts or is connected with the first extension 130. This arrangement can make the sealing flange 192 more closely match with the first extension 130, can be better to the sealing effect of the side of the first extension 130 that is far away from the pole piece 11, can improve the sealing performance of the battery 1.

According to some alternative embodiments of the present utility model, referring to fig. 1 to 6, the adjustment groove 121 is formed as a stepped hole including a first hole section 122 and a second hole section 123 communicating with each other, the second hole section 123 being located at a side of the first hole section 122 remote from the first collecting tray 128, an inner diameter of the second hole section 123 being larger than an inner diameter of the first hole section 122. At least a portion of the first extension 130 is received in the first bore section 122 and is welded to the inner peripheral wall of the first bore section 122, e.g., a portion of the first extension 130 is received in the first bore section 122 and is welded to the inner peripheral wall of the first bore section 122; for another example, the first extension 130 is entirely accommodated in the first hole section 122 and is welded to the inner peripheral wall of the first hole section 122.

At least a portion of the sealing flange 192 is received in the second bore section 123, e.g., a portion of the sealing flange 192 is received in the second bore section 123; for another example, the sealing flange 192 is entirely received in the second bore section 123.

The bottom wall of the second hole segment 123 forms a first stepped surface 124, and the sealing flange 192 is located on a side of the first stepped surface 124 away from the first collecting plate 128, and the sealing flange 192 abuts against or is connected to the first stepped surface 124.

The first extension 130 extends into the adjustment groove 121 to a different height, so that the sealing bead 192 is located at a different height of the adjustment groove 121. This setting is through setting up adjustment tank 121 into the step hole, can make adjustment tank 121 play better spacing effect to sealing turn-ups 192, can make sealing turn-ups 192 seal better to annotate liquid hole 131 to can make shutoff piece 19 better to annotate liquid hole 131's sealed effect.

According to some alternative embodiments of the present utility model, referring to fig. 1, the end cap assembly further includes a sealing plate 20, the sealing plate 20 is disposed on a side of the blocking member 19 away from the first collecting plate 128, the adjusting slot 121 further includes a third hole section 125, the third hole section 125 is located on a side of the second hole section 123 away from the first hole section 122, and at least a portion of the sealing plate 20 is received in the third hole section 125. For example, a portion of the sealing plate 20 is received in the third bore section 125; for another example, the sealing plate 20 is entirely received in the third bore section 125. This setting can play limiting displacement to sealing piece 20, and sealing piece 20 and adjustment tank 121 are connected of being convenient for can make sealing piece 20 play better limiting displacement to shutoff piece 19, can make shutoff piece 19 better to the sealed effect of annotating liquid hole 131.

According to some alternative embodiments of the present utility model, referring to fig. 1 and 6, the sealing sheet 20 is seam welded to the inner peripheral wall of the third hole section 125. This arrangement facilitates the connection of the sealing plate 20 to the inner peripheral wall of the third hole section 125, and can make the connection of the sealing plate 20 to the third hole section 125 more stable and reliable, and can ensure that the sealing plate 20 can have a better limiting effect on the blocking piece 19.

According to some alternative embodiments of the present utility model, referring to fig. 1 and 6, there is a second welding slit 180 between the outer circumferential wall of the sealing sheet 20 and the inner circumferential wall of the third hole section 125, and the width of the second welding slit 180 ranges from 0 to 0.2mm. The outer peripheral wall of the sealing plate 20 and the inner peripheral wall of the third hole section 125 generate the second welding seam 18 through welding, the second welding seam 18 is located in the second welding seam 180, when the width of the second welding seam 180 is too large, blank welding or virtual welding is easy to cause, and the welding performance between the sealing plate 20 and the third hole section 125 cannot be ensured.

According to some alternative embodiments of the present utility model, referring to fig. 6, the outer surface of the sealing plate 20 is formed with a first groove 200, the first groove 200 is adjacent to the outer peripheral edge of the sealing plate 20 and penetrates the outer peripheral wall of the sealing plate 20, the outer surface of the first end cap 120 is formed with a second groove 127, the second groove 127 is adjacent to the third hole section 125 and penetrates the inner peripheral wall of the third hole section 125, the first groove 200 and the second groove 127 are opposite and communicated, and the first groove 200 and the second groove 127 together constitute the first accommodating groove 23. The outer peripheral wall of the sealing piece 20 is connected with the inner peripheral wall of the third hole section 125 through seam welding, the second welding seam 18 generated by welding protrudes out of the connection part, and by arranging the first accommodating groove 23, the protruding part of the second welding seam 18 can be positioned in the first accommodating groove 23, so that the second welding seam 18 can be prevented from protruding out of the outer surface of the first end cover 120, the integral height of the battery 1 is not influenced, and the subsequent assembly of the battery 1 into a battery pack or a battery pack is facilitated.

According to some alternative embodiments of the present utility model, referring to fig. 1, 4 and 7, the first extension 130 is a convex hull formed by the portion of the first collecting tray 128 protruding in the direction of the battery case 10 and away from the battery's pole core 11. This arrangement can facilitate the processing to form the first extension 130 and can improve the structural strength of the first collecting tray 128, and is simple in structure, convenient to manufacture, and can improve production efficiency.

According to some embodiments of the present utility model, referring to fig. 1, a detonation preventing hole 126 is formed on the first end cap 120, and a detonation preventing sheet 14 is covered at the detonation preventing hole 126, wherein the detonation preventing sheet 14 has a thickness smaller than that of the first end cap 120. This arrangement can more easily rupture the rupture disk 14 when the pressure inside the battery 1 is excessive, thereby achieving the purpose of pressure relief and improving the safety of the battery 1.

Optionally, the explosion-proof notch 140 is formed on the explosion-proof sheet 14, when the pressure in the battery 1 is too high, the explosion-proof notch 140 breaks, so that the explosion-proof sheet 14 can break more easily, the purpose of pressure relief is achieved, and the safety of the battery 1 is improved.

According to the battery 1 of the embodiment of the second aspect of the present utility model, the battery 1 includes: battery case 10, pole piece 11, first end cap assembly 12 and second end cap assembly 15. The pole core 11 is disposed in the battery case 10, the first end cap assembly 12 and the second end cap assembly 15 are disposed on opposite sides of the battery case 10, the first end cap assembly 12 is an end cap assembly according to the above-described first embodiment of the present utility model, the first current collecting plate 128 is electrically connected to the pole core 11, and the second end cap assembly 15 is electrically connected to the pole core.

According to the battery provided by the embodiment of the utility model, the influence of the fluctuation of the height of the pole core 11 on the assembly of the battery 1 can be counteracted by arranging the end cover assembly, so that the normal assembly of the battery 1 can be ensured under the condition that the height of the pole core 11 fluctuates.

According to some embodiments of the present utility model, referring to fig. 1, the second end cap assembly 15 includes a second end cap 150, a pole 152 and a second current collecting plate 155, the pole 152 is disposed on the second end cap 150 and an insulating structure 158 is disposed between the pole 152 and the second end cap 150, and the insulating structure 158 is disposed between the pole 152 and the second end cap 150, so that electrical conduction between the second end cap 150 and the pole 152 can be prevented, and short circuit of the battery 1 is avoided. The second current collecting plate 155 is electrically connected to the pole 152 and the pole core 11, the second current collecting plate 155 includes a second current collecting plate body 156 and a second extension portion 157, the second current collecting plate body 156 is connected to the pole core 11, the second extension portion 157 protrudes from the second current collecting plate body 156 toward a direction adjacent to the second end cap 150, and the second extension portion 157 is connected to the pole 152. This arrangement can improve the structural strength of the second current collecting plate 155, has a simple structure, is convenient to manufacture, and facilitates the electrical connection of the second current collecting plate 155 and the pole 152.

According to some alternative embodiments of the present utility model, during the assembly of the battery 1, the second end cap assembly 15 is covered on one side of the battery case 10, the first current collecting plate body 129 is connected with the pole core 11, then the pole core 11 connected with the first current collecting plate 128 is installed in the battery case 10, the first end cap 120 is covered on the other side of the battery case 10, the first extension 130 extends into the adjusting groove 121, and the first extension 130 is welded to the inner peripheral wall of the adjusting groove 121, so that the first current collecting plate 128 is electrically connected with the first end cap 120.

According to some alternative embodiments of the present utility model, referring to fig. 1 and 7, the pole 152 includes a pole body 153 and a pole extension 154, the pole extension 154 surrounds an outer circumferential side of the pole body 153, the pole body 153 is penetrated through the second end cap 150, the pole body 153 is welded to the second extension 157, a second receiving groove is formed on a side of the pole body 153 facing away from the second extension 157, and the welding area 22 between the pole body 153 and the second extension 157 is opposite to the second receiving groove. The third welding seam 21 generated by welding the pole body 153 and the second extension portion 157 can enable the portion of the third welding seam 21 protruding from the pole 152 to be located in the second accommodating groove by arranging the second accommodating groove, so that the overall height of the battery 1 is not affected, and the battery 1 can be conveniently assembled into a battery pack or a battery pack later.

Optionally, a first through hole 151 is formed on the second end cap 150, and the electrode post body 153 is inserted through the first through hole 151 to draw out one electrode of the battery 1. The insulating structure 158 includes a first insulating member 159 and a second insulating member 161, wherein a second through hole 160 is formed in the first insulating member 159, the first insulating member 159 is sleeved outside the post body 153 through the second through hole 160 and is positioned between the second end cap 150 and the post extension 154, insulation between the post extension 154 and the second end cap 150 can be maintained, short circuit is prevented from occurring, a third through hole 162 is formed in the second insulating member 161, the second insulating member 161 is sleeved outside the post body 153 through the third through hole 162 and is positioned between the inner circumferential wall of the first through hole 151 and the post body 153, insulation between the post 152 and the second end cap 150 can be maintained, and the battery 1 can be sealed.

According to some embodiments of the present utility model, referring to fig. 1, the second end cap 150, the insulating structure 158, and the pole 152 are integrally formed by thermal compounding or bonding. This arrangement is simple in structure, facilitates the installation of the second end cap 150, the insulating structure 158 and the pole 152, and can improve production efficiency.

According to some alternative embodiments of the present utility model, referring to fig. 1, an insulating structure 158 is integrally molded between the second end cap 150 and the post 152. This arrangement is simple in structure, facilitates the installation of the second end cap 150, the insulating structure 158 and the pole 152, and can improve production efficiency.

According to some embodiments of the present utility model, the first end cap 120 and the battery case 10 may be integrally formed, and the second end cap 150 and the battery case 10 are separately formed. This setting can reduce the installation process of battery 1, makes things convenient for the installation of battery 1, can improve production efficiency.

According to some alternative embodiments of the present utility model, the first end cap 120, the second end cap 150, and the battery case 10 are each independently molded. This setting is convenient for the inside spare part of battery 1 assemble, and the mounting means is more nimble, can adjust according to the assembly demand, makes things convenient for the installation of battery 1.

An electrical device according to an embodiment of the third aspect of the present utility model includes: a battery according to an embodiment of the above second aspect of the present utility model. For example, the electrical device may be a vehicle.

According to the power utilization device provided by the embodiment of the utility model, the normal power utilization of the power utilization device can be ensured by arranging the battery.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (23)

1. An end cap assembly, characterized in that the end cap assembly is suitable for being covered on an opening end of a battery shell, the end cap assembly comprises a first end cap and a first current collecting disc, the first current collecting disc is suitable for being electrically connected with the first end cap, one of the first end cap and the first current collecting disc is provided with an adjusting groove, and a part of the other one of the first end cap and the first current collecting disc is suitable for being accommodated in the adjusting groove and is connected with an inner peripheral wall of the adjusting groove.

2. The end cap assembly of claim 1, wherein the first end cap is formed with the adjustment slot on a side thereof facing the first current collecting plate, the first current collecting plate includes a first current collecting plate body adapted to be connected with a pole core of a battery, and a first extension protruding from the first current collecting plate body toward a direction adjacent to the first end cap, and at least a portion of the first extension is received in the adjustment slot and connected with an inner peripheral wall of the adjustment slot.

3. The end cap assembly of claim 2, wherein the outer surface of the first end cap remote from the first current collecting plate is a first end cap outer surface, the first extension not protruding from the first end cap outer surface.

4. The end cap assembly of claim 2, wherein the first extension is welded to an inner peripheral wall of the adjustment slot.

5. The end cap assembly of claim 4, wherein a first weld gap is provided between the outer peripheral wall of the first extension and the inner peripheral wall of the adjustment slot, the first weld gap having a width in the range of 0-0.2 mm.

6. The end cap assembly of claim 2, wherein the end cap assembly includes a blocking member, the adjustment slot extending through the first end cap in a thickness direction of the first end cap, the first extension portion being formed with a pour hole, the blocking member for blocking the pour hole.

7. The end cap assembly of claim 6, further comprising a sealing tab covering a side of the closure remote from the first current collecting tray.

8. The end cap assembly of claim 6, wherein the blocking member includes a blocking portion and a sealing flange, the blocking portion being disposed through the liquid injection hole and adapted to seal the liquid injection hole, the sealing flange being connected to a peripheral wall of the blocking portion and located on a side of the first extension portion remote from the first current collecting plate.

9. The end cap assembly of claim 8, wherein the closure further comprises a stop tab formed on a peripheral wall of the closure portion at an end of the fill port adjacent the first manifold plate, the stop tab adapted to abut the first extension portion to stop the closure.

10. The end cap assembly of claim 8, wherein the sealing bead abuts or is connected with the first extension.

11. The end cap assembly of claim 8, wherein the adjustment channel is formed into a stepped bore, the stepped bore including a first bore section and a second bore section in communication with each other, the second bore section being located on a side of the first bore section remote from the first manifold, an inner diameter of the second bore section being greater than an inner diameter of the first bore section, at least a portion of the first extension being received in the first bore Duan Ju in welded connection with an inner peripheral wall of the first bore section, at least a portion of the sealing flange being received in the second bore section, a bottom wall of the second bore section forming a first stepped surface, the sealing flange being located on a side of the first stepped surface remote from the first manifold, the sealing flange being in abutment or connection with the first stepped surface.

12. The end cap assembly of claim 11, further comprising a sealing tab disposed over a side of the closure remote from the first current collecting plate, the adjustment slot further comprising a third aperture segment on a side of the second aperture segment remote from the first aperture segment, at least a portion of the sealing tab being received in the third aperture segment.

13. The end cap assembly of claim 12, wherein the sealing tab is seam welded to an inner peripheral wall of the third bore section.

14. The end cap assembly of claim 13, wherein a second weld gap is provided between the outer peripheral wall of the sealing panel and the inner peripheral wall of the third bore section, the second weld gap having a width in the range of 0-0.2 mm.

15. The end cap assembly of claim 13, wherein the outer surface of the sealing plate is formed with a first groove adjacent the peripheral edge of the sealing plate and extending through the peripheral wall of the sealing plate, the outer surface of the first end cap is formed with a second groove adjacent the third bore section and extending through the inner peripheral wall of the third bore section, the first groove and the second groove are opposite and in communication, the first groove and the second groove together forming a first receiving channel.

16. The end cap assembly of claim 2, wherein the first extension is a convex hull formed by a portion of the first current collecting plate protruding away from the battery's pole core.

17. The end cap assembly of any one of claims 1-16, wherein the first end cap has a detonation aperture formed therein, the detonation aperture being capped with a detonation screen having a thickness less than a thickness of the first end cap.

18. A battery, comprising:

a battery case;

the pole core is arranged in the shell;

a first end cap assembly and a second end cap assembly, the first end cap assembly and the second end cap assembly being disposed on opposite sides of the housing, the first end cap assembly being an end cap assembly according to any one of claims 1-17, the first current collecting plate being electrically connected to the pole core, the second end cap assembly being electrically connected to the pole core.

19. The battery of claim 18, wherein the second end cap assembly comprises a second end cap, a post and a second current collecting plate, wherein the post is disposed on the second end cap and has an insulating structure with the second end cap, the second current collecting plate is electrically connected with the post and the pole core, the second current collecting plate comprises a second current collecting plate body and a second extension, the second current collecting plate body is connected with the pole core, the second extension protrudes from the second current collecting plate body toward a direction adjacent to the second end cap, and the second extension is connected with the post.

20. The battery of claim 19, wherein the post includes a post body and a post extension, the post extension surrounds an outer peripheral side of the post body, the post body is disposed through the second end cover, the post body is welded to the second extension, a second receiving groove is formed on a side of the post body facing away from the second extension, and a welding area between the post body and the second extension is opposite to the second receiving groove.

21. The battery of claim 19, wherein the second end cap, the insulating structure, and the post are integrally formed by thermal compounding or bonding; or, the insulation structure is integrally injection-molded between the second end cover and the pole.

22. The battery of claim 18, wherein the first end cap is integrally formed with the housing and the second end cap is separately formed from the housing; or the first end cover, the second end cover and the shell are respectively and independently molded.

23. An electrical device, comprising: the battery of any one of claims 18-22.