A top cover assembly and a battery

Abstract

The utility model belongs to technical field discloses a kind of top cover assembly and battery, top cover assembly includes top cover sheet, pole piece and riveting piece, top cover sheet is equipped with the pole hole of being set up in pairs, pole piece is set up in pairs, the polarity of the two pole pieces set up in pairs is same, the two pole pieces set up in pairs structure is same and all includes riveting portion and connecting portion, riveting portion is installed in pole hole, connecting portion is used to be connected with the pole lug of battery cell, riveting piece is equipped with the riveting hole of being set up in pairs, each riveting hole is cooperated with a riveting portion. The connecting portion between the two pole pieces has gap. The welding mark area between the pole piece of the top cover assembly and the pole lug of battery cell is larger, and the overcurrent capacity is better, which is beneficial to meet the large rate charge and discharge requirements of battery.

Description

Technical Field

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

[0002] The top cover assembly of batteries using related technologies typically includes a riveting component, terminals, and a top cover plate. The top cover plate has terminal holes, and the terminals are installed within these holes. One end of the terminal is riveted to the riveting component, and the other end is connected to the tab of the battery cell. Due to limitations in cell thickness, the diameter of the terminals cannot be too large. This restricts the size of the portion where the terminals connect to the cell tabs, resulting in a relatively small solder area between the terminals and the cell tabs, leading to poor current carrying capacity and failing to meet market demands for high-rate charge / discharge performance. Utility Model Content

[0003] The first objective of this utility model is to provide a top cover assembly with a large solder area between the terminal post and the battery cell's tab, which has good current carrying capacity and is conducive to meeting the high-rate charging and discharging requirements of the battery.

[0004] The second objective of this invention is to provide a battery whose top cover assembly has good overcurrent capability, and can meet the requirements for fast charging and discharging at a rate of up to 10C while ensuring the energy density of the battery.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] This utility model discloses a top cover assembly, comprising: a top cover sheet having a pair of electrode post holes; electrode posts arranged in pairs, the paired electrode posts having the same polarity and being symmetrically arranged, the two paired electrode posts having the same structure and each including a riveting portion and a connecting portion, the riveting portion being installed in the electrode post hole, and the connecting portion being used to connect with the electrode tab of the battery cell; and a riveting member having a pair of riveting holes, each riveting hole cooperating with one of the riveting portions; wherein: there is a gap between the connecting portions of the two electrode posts.

[0007] In some embodiments, the two pole holes are provided in pairs with the same size, and the two pole holes are arranged in a centrally symmetrical manner with the geometric center of the riveting member as the center point.

[0008] In some embodiments, along the length direction of the riveting member, the minimum distance L between the edge of the riveting hole and the sidewall of the riveting member is less than the thickness D of the riveting member.

[0009] In some embodiments, the top cover assembly further includes a first insulating member having a first through hole through which the riveting portion passes, the first insulating member being sandwiched between a first side of the top cover sheet and the riveting portion.

[0010] In some specific embodiments, the first side of the top cover is provided with a first receiving groove, and the first insulating member is installed in the first receiving groove, wherein a first foolproof structure is provided between the first insulating member and the groove wall of the first receiving groove.

[0011] In some specific embodiments, the first insulating member has a second receiving groove, the riveting member is installed in the second receiving groove, and the groove wall of the second receiving groove is provided with a first venting groove communicating with the first through hole.

[0012] In some embodiments, the top cover assembly further includes a second insulating member sandwiched between a second side of the top cover sheet and the connecting portion, the second insulating member having a second through hole for the riveting portion to pass through; wherein: a second anti-foolproof structure is provided between the second insulating member and the top cover sheet; and / or, the second insulating member has a third receiving groove for receiving the connecting portion, and the groove wall of the third receiving groove has a second venting groove and a separating rib for separating the two connecting portions.

[0013] In some embodiments, the top cover assembly further includes a seal, the seal including a second body portion and a second extension portion connected together, the second body portion being sandwiched between a second side of the top cover sheet and the connecting portion, and the second extension portion extending out of the pole hole and surrounding the riveting portion.

[0014] In some embodiments, the top cover plate has a pair of electrode holes, and the electrode holes are either positive or negative electrode holes, and the electrode component is either a positive or negative electrode; or, the top cover plate has two pairs of electrode holes, one pair of which are positive electrode holes and the other pair are negative electrode holes, and the electrode components are in two pairs, one pair of which are positive electrode holes and the other pair are negative electrode holes; wherein, the electrode component has a third foolproof structure, which is used to distinguish the polarity of the electrode component.

[0015] This utility model also discloses a battery, including the top cover assembly, the outer casing, and the battery cell described above. At least one end of the outer casing is open, the battery cell is installed inside the outer casing, and the top cover assembly is installed at the open end of the outer casing and is electrically connected to the tab of the battery cell.

[0016] The beneficial effects of the top cover assembly of this utility model are as follows: Because the top cover sheet has paired terminal posts, each terminal post includes a riveting portion and a connecting portion. The two riveting portions are connected to the same riveting component, and the two connecting portions are connected to the tabs of the battery cell. In the prior art, the top cover assembly and the tab of the same battery cell have only one solder mark. However, in the solution of this utility model, the top cover assembly and the tab of the same battery cell have two spaced solder marks, increasing the solder mark area and improving the current carrying capacity, which can better meet the market demand for high-rate charge and discharge performance. At the same time, the paired terminal posts do not increase the overall size of the top cover assembly, making it suitable for batteries with smaller cell sizes. While meeting the high-rate charge and discharge requirements of the battery, it is beneficial to improve the energy density of the battery. Furthermore, by setting a gap between the connecting portions, the phenomenon of deformation and mutual compression of the two terminal posts during riveting can be avoided, thereby improving the parallelism, perpendicularity, and consistency of the riveting, and increasing the assembly yield. In particular, the two pole pieces arranged in pairs can be arranged along the length of the riveted piece (consistent with the length of the top cover piece). In this case, the arrangement will not increase the width of the entire top cover assembly, and can be further applied to batteries with smaller cell dimensions along the width of the top cover assembly.

[0017] The beneficial effects of this utility model battery are as follows: due to the top cover assembly described above, the top cover assembly of this battery has good overcurrent capability, and can better meet the fast charging and discharging requirements of up to 10C rate while ensuring the energy density of the battery.

[0018] Additional aspects and advantages of this invention 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 invention. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the top cover assembly according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the top cover assembly from another direction according to an embodiment of the present invention;

[0021] Figure 3 This is an exploded structural diagram of the top cover assembly according to an embodiment of the present utility model;

[0022] Figure 4 This is a partial structural schematic diagram of the top cover assembly according to an embodiment of the present utility model;

[0023] Figure 5 This is a schematic diagram of the pole piece according to an embodiment of the present utility model;

[0024] Figure 6 This is a schematic diagram of the positive electrode post according to an embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the negative electrode post according to an embodiment of the present invention;

[0026] Figure 8 This is a structural schematic diagram of the riveting component according to an embodiment of the present utility model;

[0027] Figure 9 This is a schematic diagram of the riveting component from another direction according to an embodiment of the present utility model;

[0028] Figure 10 This is a schematic diagram of the structure of the first insulating component according to an embodiment of the present utility model;

[0029] Figure 11 This is a schematic diagram of the structure of the first insulating member in another direction according to an embodiment of the present invention;

[0030] Figure 12 This is a schematic diagram of the structure of the second insulating component according to an embodiment of the present invention;

[0031] Figure 13 This is a schematic diagram of the second insulating member in another direction according to an embodiment of the present invention;

[0032] Figure 14 This is a schematic diagram of the battery structure according to an embodiment of the present invention;

[0033] Figure 15 This is a schematic diagram of the welding structure between the top cover assembly and the electrode tabs of the battery cell in an embodiment of this utility model.

[0034] Figure label:

[0035] 100. Top cover assembly;

[0036] 110. Top cover plate; 111. Pole post hole; 112. First receiving groove; 113. First anti-foolproof groove; 114. Liquid injection hole;

[0037] 120. Terminal post; 121. Riveting part; 122. Connecting part; 1221. Anti-foolproof bevel; 1201. Positive terminal post; 1202. Negative terminal post;

[0038] 130. Riveted component; 131. First part; 132. Second part; 1301. Riveted hole;

[0039] 140. First insulating element; 141. First main body portion; 1411. First through hole; 1412. First anti-foolproof protrusion; 1413. Second receiving groove; 1414. First vent groove; 142. First extension portion;

[0040] 150. Second insulating element; 151. Second perforation; 152. Second anti-foolproof protrusion; 153. Third receiving groove; 1531. Second venting groove; 1532. Separating rib; 1533. Mating bevel;

[0041] 160. Seal; 161. Second main body; 162. Second extension;

[0042] 170. Explosion-proof valve; 180. Patch panel;

[0043] 200, casing; 300, battery cell; 310, tabs; 400, solder marks. Detailed Implementation

[0044] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0045] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between 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.

[0046] In the description of this embodiment, the terms "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0047] This utility model discloses a top cover assembly 100, see reference. Figures 1-4As shown, the top cover assembly 100 of this embodiment includes a top cover plate 110, pole pieces 120, and a riveting member 130. The top cover plate 110 is provided with a pair of pole hole 111. The pole pieces 120 are provided in pairs, and the polarity of the two pole pieces 120 in the pair is the same. The two pole pieces 120 in the pair have the same structure and each includes a riveting part 121 and a connecting part 122. The riveting part 121 is installed in the pole hole 111, and the connecting part 122 is used to connect with the tab 310 of the battery cell 300. The riveting member 130 is provided with a pair of riveting holes 1301. Each riveting hole 1301 cooperates with a riveting part 121, and there is a gap between the connecting parts 122 of the two pole pieces 120.

[0048] It is understood that, since the top cover plate 110 of this embodiment is provided with paired pole pieces 120, each pole piece 120 includes a riveting portion 121 and a connecting portion 122. The two riveting portions 121 are connected to the same riveting piece 130, and the two connecting portions 122 are welded to the tabs 310 of the battery cell 300. In related technologies, the top cover assembly and the tabs of the same battery cell have only one set of solder marks. However, in this embodiment, referring to... Figure 15 As shown, due to the provision of two connection parts 122, the top cover assembly 100 and the tab 310 of the same battery cell 300 are provided with two sets of solder marks 400, and each connection part 122 corresponds to two solder marks (the two solder marks correspond to the tabs 310 of the two battery cells 300 respectively), which increases the area of ​​the solder marks 400, improves the current carrying capacity, and can better meet the market's demand for high-rate charging and discharging performance.

[0049] Compared to the existing technology where two pole pieces correspond to two rivet pieces, in this embodiment, one rivet piece 130 corresponds to two pole pieces 120. On the one hand, one rivet piece 130 has a larger flow area, and on the other hand, the height of the rivet piece 130 can be kept consistent, avoiding the phenomenon that the rivet pieces in the two rivet piece structures are not the same height.

[0050] Meanwhile, the inclusion of two terminal posts 120 does not increase the overall size of the top cover assembly 100, making it suitable for batteries with smaller cell sizes. This allows for meeting the high-rate charge and discharge requirements of the battery while improving its energy density. Specifically, the paired terminal posts 120 can be arranged along the length of the riveting member 130 (consistent with the length of the top cover piece 110). In this arrangement, the width of the entire top cover assembly 100 is not increased, further making it suitable for batteries where the cell size is smaller along the width of the top cover assembly 100.

[0051] It should be noted that, additionally, when a single riveting component 130 needs to be riveted to two pole pieces 120 (one at a time, not simultaneously), at least one of the pole pieces 120 / pole hole 111 does not correspond to the center position of the riveting component 130. Therefore, the two pole pieces 120 will deform and compress during riveting, leading to difficulties in controlling the parallelism, perpendicularity, and consistency of the riveting. In this embodiment, by setting a gap between the connecting portions 122, the phenomenon of mutual compression due to deformation of the two pole pieces 120 during riveting can be avoided, thereby improving the parallelism, perpendicularity, and consistency of the riveting and increasing the assembly yield.

[0052] It should be noted that, in this embodiment, the top cover 110 has two structures, one of which is as follows: Figure 3 As shown, the top cover plate 110 has two pairs of terminal hole 111, one pair of which is a positive terminal hole and the other pair is a negative terminal hole. The terminal member 120 has two pairs, one pair being a positive terminal 1201 and the other pair being a negative terminal 1202. This top cover plate 110 has both positive and negative terminals 1201 installed on it. In an alternative embodiment of this invention, the top cover plate 110 has a pair of terminal hole 111, and the terminal hole 111 is either a positive or negative terminal hole, with the terminal member 120 correspondingly being either a positive terminal 1201 or a negative terminal 1202. This top cover plate 110 only has either a positive terminal 1201 or a negative terminal 1202. In actual use, the choice can be made according to the structure of the battery casing 200 and the structure of the battery cell 300. For example, if the battery casing 200 is an open structure at one end and the battery cell 300 is a same-side output tab structure, the first type of top cover plate 110 structure can be selected. If the battery casing 200 is an open structure at both ends and the battery cell 300 is a two-sided output tab structure, the second type of top cover plate 110 structure can be selected.

[0053] Optionally, the two pole holes 111 are of the same size, and the two pole pieces 120 are of the same size; with the geometric center of the riveting member as the center point, the two pole holes 111 are centrally symmetrical, so after riveting, the two pole pieces 120 are also symmetrically distributed. Furthermore, in other embodiments of this utility model, the two pole pieces 120 can also be axially symmetrically distributed with the central axis in the width direction and the central axis in the length direction of the riveting member 130 as the axes of symmetry.

[0054] Optional, see reference Figure 3 As shown, the top cover plate 110 is provided with a liquid injection hole 114. During the manufacturing process, electrolyte needs to be injected into the liquid injection hole 114 for formation.

[0055] Optional, see reference Figure 3As shown, the top cover plate 110 is provided with an explosion-proof valve 170 and a patch 180 attached to the explosion-proof valve 170. The explosion-proof valve 170 is used to be opened by gas to release pressure when the battery experiences thermal runaway. The patch 180 is used to protect the explosion-proof valve 170 during transportation or installation of the top cover assembly 100.

[0056] Optional, see reference Figures 6-7 As shown, in this embodiment, the positive electrode post 1201 is made of aluminum, and the negative electrode post 1202 is made of copper-aluminum composite electrode post. That is, part of the riveting part 121 of the negative electrode post 1202 is made of aluminum, and the other part of the riveting part 121 and the connecting part 122 is made of copper, which facilitates the riveting of the riveting part 121 and the riveting part 130 and improves the connection strength between the riveting part 121 and the riveting part 130.

[0057] Optional, see reference Figures 5-6 As shown, the terminal 120 is provided with a third anti-mistake structure, which is used to distinguish the polarity of the terminal 120. This prevents the terminal 120 from being installed backwards. The third anti-mistake structure can be an anti-mistake slope 1221 provided on the connecting part 122. The anti-mistake slope 1221 on the positive terminal 1201 and the negative terminal 1202 are in different positions, so the polarity can be determined based on the position of the anti-mistake slope 1221.

[0058] Optionally, along the length of the riveting member 130, the minimum distance L between the edge of the riveting hole 1301 and the sidewall of the riveting member 130 is less than the thickness D of the riveting member 130. This ensures the riveting strength and sealing reliability of the riveting member 130 and the riveting portion 121.

[0059] refer to Figures 3-4 and Figure 9 As shown, the top cover assembly 100 also includes a first insulating member 140. The first insulating member 140 has a first through hole 1411 for the riveting part 121 to pass through. The first insulating member 140 is sandwiched between the first side of the top cover plate 110 and the riveting part 130. It can be understood that the added first insulating member 140 can achieve insulation between the top cover plate 110 and the riveting part 130, preventing the top cover plate 110 and the riveting part 130 from conducting. The specific material of the first insulating member 140 can be adjusted according to actual needs.

[0060] Optional, see reference Figure 4 As shown, a first receiving groove 112 is provided on the first side of the top cover plate 110, and the first insulating member 140 is installed in the first receiving groove 112. It can be understood that installing the first insulating member 140 in the first receiving groove 112 can improve the installation stability of the first insulating member 140, avoid the phenomenon of connection failure caused by the first insulating member 140 shaking during the press-fit connection of the riveting part 121 and the riveting member 130, and improve the manufacturing yield of the top cover assembly 100.

[0061] Further optional, see reference Figure 3 and Figure 10 As shown, a first anti-mistake structure is provided between the first insulating member 140 and the groove wall of the first receiving groove 112. It can be understood that the first anti-mistake structure, on the one hand, can position the first insulating member 140 and the top cover plate 110, further improving the installation stability of the first insulating member 140, and on the other hand, can prevent the first insulating member 140 from being installed backwards. More optionally, the first anti-mistake structure includes a first anti-mistake protrusion 1412 disposed on the bottom wall of the first insulating member 140 and a first anti-mistake groove 113 disposed on the bottom wall of the first receiving groove 112. There are two first anti-mistake protrusions 1412, and the two first anti-mistake protrusions 1412 are spaced apart along the length and width directions of the top cover plate 110. The first anti-mistake groove 113 and the first anti-mistake protrusion 1412 are provided in a one-to-one correspondence and are shaped to fit each other. In an alternative embodiment, the first anti-mistake protrusion 1412 may also be disposed on the bottom wall or side wall of the first receiving groove 112, and the first anti-mistake groove 113 may be disposed on the bottom wall or side wall of the first insulating member 140. Of course, in other embodiments of the present invention, the first anti-mistake structure may be selected in other structural forms according to actual needs, and is not limited to the above description.

[0062] Optional, see reference Figure 11 As shown, the first insulating member 140 has a second receiving groove 1413, and the riveting member 130 is installed in the second receiving groove 1413. It can be understood that installing the riveting member 130 in the second receiving groove 1413 of the first insulating member 140 can improve the installation stability of the riveting member 130. In the actual riveting connection process, the first insulating member 140 is installed in the first receiving groove 112, the riveting member 130 is installed in the second receiving groove 1413, and then the riveting part 121 is passed through the first through hole 1411 and the riveting hole 1301 for riveting. During the riveting process, the stability of the riveting member 130 is good, improving the riveting yield.

[0063] Further optional, see reference Figure 11 As shown, the second receiving groove 1413 has a first vent groove 1414 on its groove wall that communicates with the first through hole 1411. It can be understood that the first vent groove 1414 can avoid misjudgment caused by gas residue during the sealing test and ensure the accuracy of the sealing test of the top cover assembly 100.

[0064] Further optional, see reference Figures 8-9As shown, the riveting member 130 has a first portion 131 and a second portion 132. The second portion 132 is mounted in the second receiving groove 1413, and the first portion 131 abuts against the end face of the first insulating member 140. This further ensures the connection stability between the riveting member 130 and the first insulating member 140. It should be noted that, in this embodiment, the minimum distance L between the edge of the riveting hole 1301 and the sidewall of the riveting member 130 is the distance between the edge of the riveting hole 1301 and the sidewall of the second portion 132.

[0065] Further optional, see reference Figure 10 As shown, the first insulating member 140 includes a first main body portion 141 and a first extension portion 142. A first receiving groove 112 is disposed on the first main body portion 141, and the first extension portion 142 extends into the electrode post hole 111 and surrounds the riveting portion 121. It can be understood that the first insulating member 140, including the first extension portion 142 extending into the electrode post hole 111, can effectively prevent electrical contact between the burrs on the surface of the top cover plate 110 and the electrode post 120, eliminating the risk of short circuit.

[0066] It should be noted that in this embodiment, there are two first insulating members 140, and the two first insulating members 140 are respectively provided for the two riveting members 130. Of course, in an alternative embodiment, there can be one first insulating member 140, and two riveting members 130 are installed at the same time.

[0067] refer to Figures 3-4 as well as Figures 12-13 As shown, the top cover assembly 100 also includes a second insulating member 150, which is sandwiched between the second side of the top cover piece 110 and the connecting portion 122. The second insulating member 150 has a second through hole 151 for the riveting portion 121 to pass through. It can be understood that the added second insulating member 150 can achieve insulation between the top cover piece 110 and the connecting portion 122, preventing the top cover piece 110 and the connecting portion 122 from conducting. The specific material of the second insulating member 150 can be adjusted according to actual needs.

[0068] Optionally, a second anti-mistake structure is provided between the second insulating member 150 and the top cover plate 110. It is understood that the second anti-mistake structure, on the one hand, enables positioning between the second insulating member 150 and the top cover plate 110, further improving the installation stability of the second insulating member 150, and on the other hand, prevents the second insulating member 150 from being installed backwards. More specifically, the second anti-mistake structure includes a second anti-mistake protrusion 152 disposed on the top wall of the second insulating member 150 and a second anti-mistake groove disposed on the bottom wall of the top cover plate 110. There are two second anti-mistake protrusions 152, and the two protrusions 152 are spaced apart along the length and width directions of the top cover plate 110. The second anti-mistake groove and the second anti-mistake protrusion 152 are provided in a one-to-one correspondence and are shaped to fit each other.

[0069] In an alternative embodiment, the second anti-mistake protrusion 152 may also be disposed on the bottom wall of the top cover plate 110, and the second anti-mistake groove may be disposed on the top wall of the second insulating member 150. Of course, in other embodiments of the present invention, the second anti-mistake structure may be selected in other structural forms according to actual needs, and is not limited to the above description.

[0070] Optional, see reference Figure 13 As shown, the second insulating member 150 is provided with a third receiving groove 153, which is used to receive the connecting part 122, and the groove wall of the third receiving groove 153 is provided with a second venting groove 1531. It can be understood that the provided second venting groove 1531 can avoid misjudgment caused by gas residue during the sealing test, and ensure the accuracy of the sealing test of the top cover assembly 100. Further optionally, the third receiving groove 153 is provided with a separating rib 1532 to separate the two connecting parts 122. This can avoid interference between the two connecting parts 122 during the riveting connection process, and the gap between the separating rib 1532 and the two connecting parts 122 is adapted.

[0071] It should be further explained that, as described above, the connecting part 122 is provided with a foolproof inclined surface 1221 as a third foolproof structure, and the side wall of the third receiving groove 153 also has a matching inclined surface 1533 corresponding to the foolproof inclined surface 1221, to ensure that the positive terminal 1201 and the negative terminal 1202 will not be installed in reverse. In some embodiments, the foolproof inclined surface 1221 is provided on the terminal member 120 of one polarity, while the foolproof inclined surface 1221 is not provided on the terminal member 120 of another polarity to distinguish them; in an alternative embodiment, the foolproof inclined surface 1221 provided on the terminal members 120 of different polarities has different inclination angles and different numbers to achieve the foolproof function.

[0072] It should be noted that in this embodiment, there is one second insulating member 150, and one second insulating member 150 is respectively provided for two riveting members 130. Of course, in an alternative embodiment, there can be two second insulating members 150, each corresponding to one of the two riveting members 130.

[0073] Optional, see reference Figure 4As shown, the top cover assembly 100 also includes a sealing element 160. The sealing element 160 includes a connected second main body portion 161 and a second extension portion 162. The second main body portion 161 is sandwiched between the second side of the top cover plate 110 and the connecting portion 122. The second extension portion 162 extends out of the pole post hole 111 and surrounds the riveting portion 121. It can be understood that the added sealing element 160 can further ensure the sealing performance of the connection between the pole post 120 and the top cover plate 110, thereby preventing the phenomenon of communication between the internal environment of the housing 200 and the external environment after the top cover assembly 100 and the housing 200 are assembled.

[0074] This utility model also discloses a battery, see reference. Figures 14-15 As shown, the battery includes the aforementioned top cover assembly 100, housing 200, and battery cell 300. At least one end of the housing 200 is open. The battery cell 300 is installed inside the housing 200. The top cover assembly 100 is installed at the open end of the housing 200 and is electrically connected to the tab 310 of the battery cell 300. Due to the aforementioned top cover assembly 100, the battery has good overcurrent capability, and can better meet the high-rate charge and discharge requirements while ensuring the energy density of the battery.

[0075] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0076] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A top cover assembly, characterized in that, include: A top cover plate, wherein a pair of pole holes are provided on the top cover plate; The electrode post is provided in pairs, and the two electrode posts in the pair have the same polarity. Each of the two electrode posts in the pair includes a riveting part and a connecting part. The riveting part is installed in the electrode post hole, and the connecting part is used to connect with the electrode tab of the battery cell. A riveting component, wherein the riveting component is provided with a pair of riveting holes, each of the riveting holes cooperating with a riveting part; wherein: there is a gap between the connecting parts of the two pole pieces.

2. The top cover assembly according to claim 1, characterized in that, The two pole holes are set in pairs and are the same size. With the geometric center of the riveting member as the center point, the two pole holes are set in pairs and are arranged in a centrally symmetrical manner.

3. The top cover assembly according to claim 1, characterized in that, Along the length of the riveting member, the minimum distance L between the edge of the riveting hole and the sidewall of the riveting member is less than the thickness D of the riveting member.

4. The top cover assembly according to claim 1, characterized in that, The top cover assembly further includes a first insulating member, which has a first through hole for the riveting part to pass through, and the first insulating member is sandwiched between the first side of the top cover sheet and the riveting part.

5. The top cover assembly according to claim 4, characterized in that, The top cover plate has a first receiving groove on its first side, the first insulating member is installed in the first receiving groove, and a first foolproof structure is provided between the first insulating member and the groove wall of the first receiving groove.

6. The top cover assembly according to claim 4, characterized in that, The first insulating member has a second receiving groove, the riveting member is installed in the second receiving groove, and the groove wall of the second receiving groove is provided with a first venting groove that communicates with the first through hole.

7. The top cover assembly according to claim 1, characterized in that, The top cover assembly further includes a second insulating member, which is sandwiched between a second side of the top cover sheet and the connecting portion. The second insulating member has a second through hole for the riveting portion to pass through. A second foolproof structure is provided between the second insulating element and the top cover sheet; and / or, The second insulating member is provided with a third receiving groove, which is used to receive the connecting part, and the groove wall of the third receiving groove is provided with a second venting groove and a separating rib for separating the two connecting parts.

8. The top cover assembly according to claim 1, characterized in that, The top cover assembly also includes a seal, which includes a second main body and a second extension connected together. The second main body is sandwiched between the second side of the top cover sheet and the connecting portion, and the second extension extends out of the pole hole and surrounds the riveting portion.

9. The top cover assembly according to claim 1, characterized in that, The top cover plate has a pair of electrode holes, and the electrode holes are either positive or negative electrode holes, and the electrode component is either a positive or negative electrode; or, The top cover plate is provided with two pairs of electrode holes, one pair of which are positive electrode holes and the other pair are negative electrode holes. There are two pairs of electrode components, one pair of which are positive electrode components and the other pair are negative electrode components. The electrode components are provided with a third anti-foolproof structure, which is used to distinguish the polarity of the electrode components.

10. A battery, characterized in that, The device includes a top cover assembly, a housing, and a battery cell as described in any one of claims 1-9, wherein at least one end of the housing is open, the battery cell is installed inside the housing, and the top cover assembly is installed at the open end of the housing and is electrically connected to the tabs of the battery cell.

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