Top cover assembly and battery

Abstract

The utility model provides a top cover assembly and a battery, and the top cover assembly comprises a cover plate body which is provided with a pole; the insulating part is located on the side, provided with the pole, of the cover plate body, and the pole penetrates through the insulating part; the pin is positioned on one side, far away from the cover plate body, of the insulating part and is connected with the pole; and one end of the fixing part is positioned on the insulating part, and the other end of the fixing part is connected with the pin so as to fix the relative position of the insulating part and the pin. The pin can be restrained to be stably arranged relative to the pole, displacement of the pin relative to the pole is avoided, connection failure of the pin and the pole is further avoided, and connection stability of the pin and the pole is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a top cap subassembly and battery. BACKGROUND

[0002] The connection of the pin and the pole in the battery is welding, with the use of the battery, there will be connection failure between the pin and the pole, which leads to the battery can not be used normally. UTILITY MODEL CONTENTS

[0003] Therefore, the utility model discloses a top cap subassembly and battery to solve the problem of pin and pole connection failure.

[0004] In order to achieve the above purpose, the utility model provides a top cap subassembly, which comprises:

[0005] The cover plate body is provided with a pole;

[0006] The insulating piece is located on one side of the cover plate body, and the pole passes through the insulating piece and is arranged;

[0007] The pin is located on the side of the insulating piece away from the cover plate body and is connected with the pole;

[0008] The fixing piece is located on one end of the insulating piece, and the other end is connected with the pin to fix the relative position of the insulating piece and the pin.

[0009] Further, the pin comprises a fixing part and a connecting part connected in sequence, the connecting part is arranged to be bent relative to the fixing part, the insulating piece is provided with a pin groove arranged towards the fixing part, the fixing part is located in the pin groove, and one end of the fixing piece is located on the side wall of the pin groove and the other end is connected with the fixing part or the connecting part.

[0010] Further, the two side walls of the pin groove arranged opposite in the length direction of the fixing part are both provided with the fixing piece, and the fixing piece is connected with the fixing part.

[0011] Further, a fixing groove is formed in the side wall of the pin groove, and the fixing piece is located in the fixing groove.

[0012] Further, the fixing piece comprises a supporting leg extending from the groove bottom of the fixing groove to the groove opening and a connecting arm extending from the supporting leg towards the fixing part, and the connecting arm is connected with the fixing part.

[0013] Further, the fixing part is provided with a connecting area in contact with the connecting arm of the fixing piece, and the connecting area is arranged to be recessed relative to the fixing part.

[0014] Further, the connecting arm is arranged flush with the side wall of the pin groove.

[0015] Further, the side wall of the pin groove near the connecting portion is provided with the fixing member in the length direction of the connecting portion, the fixing member is connected with the connecting portion, and a projection of the fixing member on the connecting portion is located in the middle of the connecting portion.

[0016] Further, the connecting portion is provided with a pin middle slot, and the fixing member is connected with the pin middle slot.

[0017] Further, the fixing member is a hook, the hook comprises a support portion and a hooking portion connected in sequence, the support portion is located on the side wall of the pin groove, and the hooking portion is hooked with the pin middle slot.

[0018] Further, the hooking portion comprises a first portion and a second portion, the support portion, the first portion and the second portion are connected in sequence and bent, and the first portion is arranged through the pin middle slot.

[0019] Based on the same inventive concept, the application further provides a battery comprising a cell and the top cover assembly as described above, and a pin of the cell is connected with the pin.

[0020] As can be seen from the above, the top cover assembly provided by the application sets a fixing member on the insulating member and connects the fixing member with the pin, so that the insulating member provides a restraining force to the pin through the fixing member, the pole is arranged through the insulating member and is stably arranged relative to the insulating member, the restraining force can constrain the pin to be stably arranged relative to the pole, the displacement of the pin relative to the pole is avoided, the connection failure of the pin and the pole is avoided, the connection stability of the pin and the pole is ensured, the practicability of the top cover assembly is improved, and the service life of the top cover assembly is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0022] Figure 1 Structure diagram of the connection between the fixing member and the fixing portion in the pin assembly of the embodiment of the application Figure 1 ;

[0023] Figure 2 Structure diagram of the connection between the fixing member and the fixing portion in the pin assembly of the embodiment of the application Figure 2 ;

[0024] Figure 3 Structure diagram of connection between the fixing member and the connecting part in the pin assembly of the embodiment of the utility model Figure 1 ;

[0025] Figure 4 Structure diagram of connection between the fixing member and the connecting part in the pin assembly of the embodiment of the utility model Figure 2 ;

[0026] Figure 5 Structure diagram of connection between the pin and the pole in the related art;

[0027] Figure 6 Structure diagram of connection between the pin and the pole in the related art;

[0028] Figure 7 Structure diagram of connection between the pin and the pole in the related art.

[0029] In the figure: 10, cover plate body; 11, pole; 20, insulating piece; 21, pin groove; 22, fixing groove; 30, pin; 31, fixing part; 311, connecting area; 32, connecting part; 321, pin middle slot; 40, fixing member; 41, supporting leg; 42, connecting arm; 43, hook; 431, supporting part; 432, hooking part; 4321, first part; 4322, second part; 50, battery cell; 51, tab; 60, gap. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the following will be further explained in detail in combination with specific embodiments and with reference to the drawings.

[0031] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the utility model should be understood as the usual meaning by those skilled in the art to which the present application belongs. The "first", "second" and similar words used in the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Include" or "contain" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connection" or "connected" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0032] As described in the background, the connection between the pin and the pole in the battery is welding, and with the use of the battery, there may be a connection failure between the pin and the pole, which causes the battery to be unable to be used normally.

[0033] Based on this, the application provides a top cover assembly to solve the problem of connection failure between the pin and the pole.

[0034] The application will be described in detail below through one or more specific embodiments.

[0035] In some embodiments, referring to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , a top cover assembly comprises:

[0036] a cover plate body 10, on which a pole 11 is arranged;

[0037] an insulating piece 20, which is arranged on the side of the cover plate body 10 where the pole 11 is arranged, and the pole 11 passes through the insulating piece 20;

[0038] a pin 30, which is arranged on the side of the insulating piece 20 away from the cover plate body 10, and is connected with the pole 11;

[0039] a fixing piece 40, one end of which is arranged on the insulating piece 20, and the other end of which is connected with the pin 30, so as to fix the relative position of the insulating piece 20 and the pin 30.

[0040] Specifically, the insulating piece 20 is provided with a hole which is adapted to the periphery of the pole 11, and the pole 11 passes through the hole to be connected with the pin 30. The pin 30 is provided with a through hole which is adapted to the periphery of the pole 11, and the pole 11 passes through the through hole, the side wall of the pole 11 is welded with the inner wall of the through hole, so as to realize the connection between the pole 11 and the pin 30, and the end face of the pole 11 passing through the through hole is flush with the side of the pin 30 away from the insulating piece 20.

[0041] The fixing piece 40 is arranged on the insulating piece 20 and connected with the pin 30, so as to fix the connection between the insulating piece 20 and the pin 30, the pole 11 passes through the insulating piece 20, that is, there is no relative displacement between the insulating piece 20 and the pole 11, so as to avoid the displacement of the pin 30 relative to the pole 11, which causes the connection failure between the pin 30 and the pole 11.

[0042] In the embodiment, the insulating piece 20 is provided through the fixing piece 40, the fixing piece 40 is connected with the pin 30, the insulating piece 20 provides a constraint force to the pin 30 through the fixing piece 40, the pole 11 is provided through the insulating piece 20, and the pole 11 is stably provided relative to the insulating piece 20. Therefore, the constraint force can constrain the pin 30 to be stably provided relative to the pole 11, avoid displacement of the pin 30 relative to the pole 11, avoid disconnection of the pin 30 and the pole 11, ensure the connection stability of the pin 30 and the pole 11, and be beneficial to enhancing the practicability of the top cover assembly, thereby prolonging the service life of the top cover assembly.

[0043] Referring to Figure 5 、 Figure 6 and Figure 7 , the tab 51 of the battery cell 50 shown in the figure is welded on the side surface. During cell assembly, the pin 30 has an L-shaped structure to connect the tab 51 and the pole 11 on the top surface. However, when designing a tab welding tool to weld the tab 51 and the pin 30, a gap 60 of 1-2 mm needs to be left between the pin 30 and the side surface of the battery cell 50 to set the welding tool. After welding is completed, the welding tool is removed, and the gap 60 between the pin 30 and the battery cell 50 remains. Based on this, during subsequent use of the battery, the position of the battery cell 50 is not fixed and is prone to left-right movement, thereby driving the tab 51 to move left and right. The pin 30 also moves under the pulling force of the tab 51, and the pin 30 moves relative to the pole 11. As the movement of the pin 30 relative to the pole 11 increases, the welding effect of the pin 30 and the pole 11 is insufficient, the pin 30 and the pole 11 are disconnected, the connection between the pin 30 and the pole 11 is invalid, and the battery is invalid and cannot be used continuously.

[0044] In addition, during cell assembly, the pin 30 is first welded with the pole 11 and then welded with the tab 51. Due to the center of gravity of the L-shaped structure, the pin 30 is prone to eversion and is inconvenient to weld.

[0045] Based on this, the application also provides a top cover assembly to solve the problems of disconnection of the pin 30 and the pole 11 and inconvenience in welding the pin 30 and the pole 11 when the pin 30 has an L-shaped structure.

[0046] In some embodiments, continuing to refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown, the pin 30 comprises a fixed portion 31 and a connecting portion 32 connected in sequence, the connecting portion 32 is arranged in a bent manner relative to the fixed portion 31, the insulating piece 20 is provided with a pin groove 21 arranged towards the fixed portion 31, the fixed portion 31 is located in the pin groove 21, and one end of the fixing piece 40 is located on the side wall of the pin groove 21 and the other end is connected with the fixed portion 31 or the connecting portion 32.

[0047] Specifically, the connecting portion 32 is bent away from one side of the fixed portion 31 of the insulating piece 20, the pin groove 21 is used to accommodate the fixed portion 31 of the pin 30, one side of the pin groove 21 close to the cover body 10 is provided with a hole for the pole 11 to pass through, and the fixed portion 31 is provided with a through hole corresponding to the hole for the pole 11 to pass through, and the pole 11 and the pin groove 21 are fixedly connected in position through the hole.

[0048] The fixing piece 40 is located on the side wall of the pin groove 21 and connected with the fixed portion 31 or the connecting portion 32 of the pin 30, so that the pin 30 is fixedly arranged relative to the pin groove 21, and then the position of the pin 30 relative to the pole 11 is fixed, avoiding displacement of the pin 30 relative to the pole 11, and then the connection failure of the pin 30 relative to the pole 11 can be avoided. In addition, the arrangement of the fixing piece 40 enables the pin 30 and the pole 11 to be stably connected before being connected, avoiding the instability of the center of gravity caused by the L-shaped structure of the pin 30, so that the fixed portion 31 of the pin 30 cannot be stably positioned in the pin groove 21, thereby facilitating the welding of the pin 30 and the pole 11, and improving the welding efficiency of the pin 30 and the pole 11, and then improving the assembly efficiency of the top cover assembly.

[0049] In some embodiments, continuing to refer to Figure 1 and Figure 2 , the two side walls of the pin groove 21 arranged opposite in the length direction of the fixed portion 31 are each provided with the fixing piece 40, and the fixing piece 40 is connected with the fixed portion 31.

[0050] Specifically, the length direction of the fixed portion 31 is the extension direction of the fixed portion 31, and the two side walls of the pin groove 21 arranged opposite in the length direction of the fixed portion 31 are located on the two sides of the fixed portion 31. The fixing piece 40 is arranged on the two sides of the fixed portion 31 and connected with the fixed portion 31, which not only enables the fixing piece 40 to apply uniform fixing to the fixed portion 31, but also facilitates the connection of the fixing piece 40 with the fixed portion 31, and is beneficial to improve the practicality of the top cover assembly.

[0051] In some embodiments, a fixing groove 22 is formed on the sidewall of the pin groove 21, and the fixing member 40 is located in the fixing groove 22.

[0052] Specifically, the fixing part 31 is located in the pin groove 21, the sidewall of the pin groove 21 is protrudingly arranged relative to the fixing part 31, the fixing member 40 is located on the sidewall of the pin groove 21 and connected with the fixing part 31. The fixing groove 22 is arranged on the sidewall of the pin groove 21, and the fixing member 40 is arranged in the fixing groove 22, which can shorten the distance between the fixing member 40 and the fixing part 31 in the extension direction of the sidewall of the pin groove 21, thereby enhancing the constraint force of the fixing member 40 on the fixing part 31, so that the fixing member 40 and the fixing part 31 are stably connected, avoiding displacement between the pin 30 and the pole 11, affecting the connection stability of the pin 30 and the pole 11, and being beneficial to improving the practicality of the top cover assembly.

[0053] In some embodiments, the fixing member 40 includes a supporting leg 41 extending from the groove bottom to the groove opening of the fixing groove 22 and a connecting arm 42 extending from the supporting leg 41 towards the fixing part 31, and the connecting arm 42 is connected with the fixing part 31.

[0054] Specifically, the fixing member 40 is integrally connected with the fixing groove 22, i.e., integrally connected with the pin groove 21 (the insulating member 20), which can enhance the connection stability of the fixing member 40 and the fixing groove 22. The supporting leg 41 is used to connect the connecting arm 42 and the fixing groove 22, and the connecting arm 42 is used to connect with the fixing part 31 and apply a constraint force to the fixing part 31. One side of the connecting arm 42 close to the fixing part 31 is in contact with the fixing part 31 to limit the fixing part 31, thereby constraining the fixing part 31, avoiding displacement of the fixing part 31 relative to the pin groove 21, thereby avoiding connection failure of the pin 30 and the pole 11, and being beneficial to improving the practicality of the top cover assembly.

[0055] In some embodiments, the fixing part 31 is provided with a connecting area 311 in contact with the connecting arm 42 of the fixing member 40, and the connecting area 311 is recessed relative to the fixing part 31.

[0056] Specifically, the fixing part 31 is located in the pin groove 21, the side wall of the pin groove 21 is protruding relative to the fixing part 31, the fixing part 40 is located on the side wall of the pin groove 21, in order to avoid the setting of the fixing part 40 affecting the normal use of the pin groove 21 (that is, the insulating part 20), the fixing part 40 is set not to be protruding relative to the side wall of the pin groove 21, the connecting arm 42 of the fixing part 40 is in contact with the fixing part 31 to limit and constrain the fixing part 31, the height difference between the fixing part 31 and the side wall of the pin groove 21 is small, if the thickness of the connecting arm 42 (that is, the vertical distance between the side away from the fixing part 31 of the connecting arm 42 and the fixing part 31) is matched with the height difference between the fixing part 31 and the side wall of the pin groove 21, the limiting and constraining effect of the connecting arm 42 on the fixing part 31 is poor, therefore, the recessed connecting area 311 is arranged on the fixing part 31 to increase the height difference between the connecting area 311 on the fixing part 31 and the side wall of the pin groove 21, so that the thickness of the connecting arm 42 is matched, which can ensure the limiting and constraining effect of the connecting arm 42 on the fixing part 31, avoid displacement between the pin 30 and the pole 11, and cause the connection between the pin 30 and the pole 11 to fail, and also does not affect the normal setting of the side wall of the pin groove 21 in the battery, which is beneficial to improve the practicability of the top cover assembly.

[0057] In some embodiments, the connecting arm 42 is arranged flush with the side wall of the pin groove 21.

[0058] Specifically, the connecting arm 42 is flush with the side wall of the pin groove 21, that is, the fixing part 40 is flush with the side wall of the pin groove 21, which can avoid the setting of the fixing part 40 causing a gap on the side wall of the pin groove 21, affecting the protection of the fixing part 31 by the side wall of the pin groove 21, and is beneficial to reduce the influence of the fixing part 40 on the side wall of the pin groove 21, ensure the integrity of the insulating part 20, and improve the practicability of the top cover assembly.

[0059] In some embodiments, the side wall of the pin groove 21 near the connecting part 32 is provided with the fixing part 40 extending in the length direction of the connecting part 32, the fixing part 40 is connected with the connecting part 32, and the projection of the fixing part 40 on the connecting part 32 is located in the middle of the connecting part 32.

[0060] Specifically, the length direction of the connecting part 32 is the extension direction of the connecting part 32, one end of the connecting part 32 is connected with the fixing part 31, and the other end is a free end, and the extension direction of the fixing part 40 is the same as the extension direction of the free end of the connecting part 32.

[0061] The fixing part 31 is located in the pin groove 21, and the side wall of the pin groove 21 corresponding to the connection part 32 is the side wall of the pin groove 21 close to the connection part 32, which is provided with the fixing part 40 extending towards the connection part 32. The fixing part 40 is connected with the connection part 32 to exert a limiting and restraining action on the connection part 32, and further on the pin 30, thereby avoiding the displacement of the pin 30 relative to the pole 11 causing connection failure. The projection of the fixing part 40 on the connection part 32 is located in the middle of the connection part 32 to exert a uniform restraining force on the connection part 32, thereby avoiding partial offset of the pin 30 relative to the pole 11 due to uneven restraining force, so that the position of the pin 30 in the pin groove 21 is skewed, affecting the normal setting of the pin 30 in the top cover assembly.

[0062] In some embodiments, the connection part 32 is provided with a pin middle slot 321, and the fixing part 40 is connected with the pin middle slot 321.

[0063] Specifically, the pin middle slot 321 is located in the middle of the connection part 32, and the slot opening is located at one end of the connection part 32 away from the fixing part 31. The fixing part 40 is connected with the slot bottom of the pin middle slot 321, which can not only realize the connection with the connection part 32, but also reduce the connection distance with the connection part 32, thereby improving the connection stability of the fixing part 40 and the connection part 32, and facilitating the setting.

[0064] In some embodiments, the fixing part 40 is a hook 43, which includes a support part 431 and a hooking part 432 connected in sequence. The support part 431 is located on the side wall of the pin groove 21, and the hooking part 432 is hooked with the pin middle slot 321.

[0065] Specifically, the hook 43 is connected with the pin middle slot 321 on the connecting part 32 to limit and constrain the connecting part 32, and then limit and constrain the pin 30. The hooking part 432 of the hook 43 is hooked with the pin middle slot 321, and the supporting part 431 is used to connect the hooking part 432 and the pin groove 21. The supporting part 431 can exert a certain limiting effect on the connecting part 32 in the left-right direction, and the hooking part 432 can exert a certain limiting effect on the connecting part 32 in the up-down direction. Thus, the connecting part 32 can be limited and constrained in multiple directions, and then the pin 30 can be constrained and limited, avoiding the disconnection of the pin 30 and the pole 11, and then causing the failure.

[0066] In some embodiments, the hooking part 432 includes a first part 4321 and a second part 4322, and the supporting part 431, the first part 4321 and the second part 4322 are sequentially connected and bent. The first part 4321 passes through the pin middle slot 321.

[0067] Specifically, the hooking part 432 includes a first part 4321 and a second part 4322, and the second part 4322 is arranged in parallel with the supporting part 431 to ensure the stability of the hooking of the fixing part 40 and the pin middle slot 321. Meanwhile, the second part 4322 can occupy the gap 60 between the connecting part 32 and the electric core 50 to avoid the movement of the electric core 50 in the gap 60, and then avoid the pulling of the pin 30 to cause the disconnection of the pin 30 and the pole 11, and the connection failure. The second part 4322 can ensure the connection stability of the hook 43 and the connecting part 32, and stably apply a constraint force to the pin 30, and can avoid the connection failure of the pin 30 and the pole 11 in the top cover assembly due to the movement of the electric core 50, which is beneficial to improve the practicability of the top cover assembly.

[0068] Based on the same inventive concept, the application also provides a battery including an electric core 50 and a top cover assembly as described above. The tab 51 of the electric core 50 is connected with the connecting part 32.

[0069] Specifically, when the pin 30 includes the fixing part 31 and the connecting part 32, the tab 51 of the electric core 50 is connected with the connecting part 32, so that the pin 30 connects the tab 51 of the electric core 50 with the pole 11, and the battery is charged and discharged.

[0070] The battery provided in the embodiment has the same beneficial effects as the top cover assembly described in the above embodiments, and thus will not be described here.

[0071] It should be understood by those of ordinary skill in the art that the above discussion of any of the embodiments is merely exemplary and is not intended to suggest the scope of the application (including the claims) is limited to these examples; the above embodiments or technical features among different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the application as described above, which are not provided in details for the sake of brevity.

[0072] Embodiments of the present application are intended to cover all such alternatives, modifications, and variations as fall within the broad scope of the appended claims. Accordingly, any and all such alternations, modifications, equivalents, improvements, and the like are intended to be encompassed by the present application.

Claims

1. A cap assembly, characterized by, include: The cover plate body is equipped with pole posts; An insulating element is located on one side of the cover plate body, and the pole post is disposed through the insulating element; The pin is located on the side of the insulating member away from the cover plate body and is connected to the pole post; A fixing member, one end of which is located on the insulating member and the other end of which is connected to the pin, to fix the relative position of the insulating member and the pin.

2. The roof assembly of claim 1, wherein, The pin includes a fixed part and a connecting part connected in sequence. The connecting part is bent relative to the fixed part. The insulating member has a pin groove facing the fixed part. The fixed part is located in the pin groove. One end of the fixed member is located on the side wall of the pin groove, and the other end is connected to the fixed part or the connecting part.

3. The top cover assembly according to claim 2, characterized in that, The pin groove has fixing members on both sides of the fixing part that are opposite to each other in the length direction of the fixing part, and the fixing members are connected to the fixing part.

4. The top cover assembly according to claim 3, characterized in that, A fixing groove is provided on the side wall of the pin groove, and the fixing member is located in the fixing groove.

5. The top cover assembly according to claim 4, characterized in that, The fastener includes a support leg extending from the bottom of the fixing groove toward the groove opening and a connecting arm extending from the support leg toward the fixing part, the connecting arm being connected to the fixing part.

6. The top cover assembly according to claim 5, characterized in that, The fixing part is provided with a connecting area that contacts the connecting arm of the fixing member, and the connecting area is recessed relative to the fixing part.

7. The top cover assembly according to claim 6, characterized in that, The connecting arm is flush with the side wall of the pin groove.

8. The top cover assembly according to claim 2, characterized in that, The fixing member is provided on the side wall of the pin groove near the connecting part, extending along the length direction of the connecting part. The fixing member is connected to the connecting part, and its projection on the connecting part is located in the middle of the connecting part.

9. The top cover assembly according to claim 8, characterized in that, The connecting part has a pin center slot, and the fixing member is connected to the pin center slot.

10. The top cover assembly according to claim 9, characterized in that, The fastener is a hook, which includes a support part and a hooking part connected in sequence. The support part is located on the side wall of the pin groove, and the hooking part is connected to the pin through a groove in the middle.

11. The top cover assembly according to claim 10, characterized in that, The mounting part includes a first part and a second part. The support part, the first part, and the second part are connected and bent in sequence. The first part passes through the slot in the middle of the pin.

12. A battery, characterized in that, It includes a battery cell and a top cover assembly as described in any one of claims 1 to 11, wherein the tabs of the battery cell are connected to the pins.

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