Battery cover plate assembly and battery

Abstract

This application relates to the field of battery technology, and in particular to a battery cover assembly and a battery, including a cover, terminals, and connecting pieces. The terminals are mounted on the cover, and one of the terminals and the connecting piece forms an anti-detachment protrusion, while the other forms an anti-detachment mounting hole. The anti-detachment protrusion is inserted into and connected to the anti-detachment mounting hole. It is evident that by adding an anti-detachment protrusion to one of the connecting piece and the terminal, and an anti-detachment mounting hole to the other, a robust connection structure is formed between the anti-detachment protrusion and the anti-detachment mounting hole. Compared to the previous planar fit, this structure is less prone to detachment and more reliable, thus preventing increased internal resistance and temperature rise during battery use, ultimately ensuring battery performance. Furthermore, the anti-detachment protrusion and anti-detachment mounting hole also serve a positioning function during assembly, greatly improving assembly accuracy and yield.

Description

Technical Field

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

[0002] The use of lithium batteries is becoming increasingly widespread. However, during use, it has been found that the internal resistance of the battery increases and the temperature rises. This is mainly due to the loose connection between the connecting piece and the terminal block of the cover plate, which causes the connecting piece to detach. According to research, the existing connecting piece and terminal block are bonded together surface to surface and then welded. If the flatness of the bonding surface of a certain component does not meet the requirements, the weld will detach, which will ultimately lead to the problem of increased internal resistance and temperature of the battery during use. Utility Model Content

[0003] The purpose of this application is to provide a battery cover assembly and a battery, which to some extent solves the technical problem in the prior art where the connecting piece and the terminal post are bonded surface to surface and then welded, and if the flatness of the bonding surface of a certain component does not meet the requirements, the weld will fall off.

[0004] This application provides a battery cover assembly, including: a cover plate, a terminal post, and a connecting piece; wherein, the terminal post is mounted on the cover plate, and one of the terminal post and the connecting piece forms an anti-detachment protrusion, and the other forms an anti-detachment mounting hole, and the anti-detachment protrusion is inserted into and connected to the anti-detachment mounting hole.

[0005] In the above technical solution, the battery cover assembly further includes a first insulating member and a heat-insulating member; wherein, the first insulating member is installed on the side of the cover near the electrode group; a portion of the connecting piece is disposed on the side of the first insulating member near the electrode group, and the heat-insulating member is disposed between the two.

[0006] In any of the above technical solutions, the first insulating member is further provided with a mounting groove, and the heat-insulating insulating member is disposed within the mounting groove.

[0007] In any of the above technical solutions, the heat insulation component and the first insulation component are further connected by integral molding or hot melting.

[0008] In any of the above technical solutions, the connecting piece further includes a first mating part and a second mating part connected to each other, wherein the first mating part is formed with the anti-detachment protrusion or the anti-detachment mounting hole;

[0009] The cover plate has a first mounting through hole, the first insulating member has a clearance through hole, and the first mating part is sequentially installed in the first mounting through hole and the clearance through hole; the second mating part is disposed on the side of the first insulating member near the electrode group, and the heat insulation insulating member is disposed between the two.

[0010] In any of the above technical solutions, the heat insulation component is further made of silicone or high-temperature resin.

[0011] In any of the above technical solutions, the battery cover assembly further includes a support ring, a second insulating element, and a sealing ring; wherein the electrode post is installed on the side of the cover away from the electrode group; the cover has a second mounting through hole surrounding and communicating with the first mounting through hole; the support ring is disposed in the second mounting through hole and connected to the cover;

[0012] A portion of the support ring extends to the outside of the cover plate away from the electrode assembly, and the second insulating member wraps around the outside of the portion of the support ring exposed on the outside of the cover plate to form an insulating structure, and the insulating structure surrounds the outside of the pole post; the sealing ring is fitted around the outside of the end of the pole post near the electrode assembly and is compressed between the support ring and the pole post, and the sealing ring is blocked between the first mating portion of the connecting piece and the support ring.

[0013] In any of the above technical solutions, the outer wall of the end of the pole near the pole group is further provided with a mating ring portion, the insulating structure is provided with a mating groove, and the mating ring portion is disposed in the mating groove to form an interlocking structure.

[0014] In any of the above technical solutions, the anti-detachment protrusion is further connected to the wall of the anti-detachment mounting hole by heat fusion or welding.

[0015] In any of the above technical solutions, the end of the pole away from the pole group is further provided with a mating protrusion for mating with the mounting hole on the connecting bar.

[0016] In any of the above technical solutions, the pole post is further provided with the anti-detachment protrusion, and the connecting piece is provided with the anti-detachment mounting hole.

[0017] In any of the above technical solutions, the number of the anti-detachment mounting holes and the anti-detachment protrusions are both multiple and are evenly distributed, and the multiple anti-detachment mounting holes correspond one-to-one with the multiple anti-detachment protrusions.

[0018] This application also provides a battery, including a casing, an electrode assembly, and a battery cover assembly as described in any of the above technical solutions. The electrode assembly is installed inside the casing, and the battery cover assembly covers the opening of the casing. The electrode tabs of the electrode assembly are connected to the connecting piece by welding. Therefore, this battery cover assembly possesses all the beneficial technical effects, which will not be elaborated further here.

[0019] Compared with the prior art, the beneficial effects of this application are as follows:

[0020] In the battery cover assembly provided in this application, an anti-detachment protrusion is added to one of the connecting piece and the terminal post, and an anti-detachment mounting hole is added to the other. The anti-detachment protrusion and the anti-detachment mounting hole form a firm connection structure, which is less prone to detachment than the previous planar fit, and the structure is more reliable. This can avoid the problem of increased internal resistance and temperature rise during battery use, and ultimately ensure the performance of the battery. Moreover, the anti-detachment protrusion and the anti-detachment mounting hole can also play a positioning role during the assembly process, so that the connecting piece and the terminal post will not be misaligned during the assembly process, which greatly improves the assembly accuracy and yield. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 A partial exploded view of the battery cover assembly provided in the embodiments of this application;

[0023] Figure 2 A partial cross-sectional view of the battery cover assembly provided in an embodiment of this application;

[0024] Figure 3 This is a schematic diagram of the structure of the connecting piece provided in the embodiments of this application;

[0025] Figure 4 This is another structural schematic diagram of the connecting piece provided in an embodiment of this application;

[0026] Figure 5 This is a schematic diagram of the pole structure provided in an embodiment of this application;

[0027] Figure 6 This is another structural schematic diagram of the pole provided in an embodiment of this application.

[0028] Figure label:

[0029] 1-Cover plate, 2-Pole post, 21-Anti-detachment protrusion, 22-Matching ring, 23-Matching protrusion, 3-Connecting piece, 31-First mating part, 32-Second mating part, 33-Anti-detachment mounting hole, 4-First insulating component, 41-Mounting groove, 5-Heat insulation component, 6-Support ring, 7-Second insulating component, 8-Sealing ring. Detailed Implementation

[0030] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0031] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0032] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0035] The following reference Figures 1 to 6 This application describes a battery cover assembly and a battery according to some embodiments.

[0036] Example 1

[0037] See Figures 1 to 6As shown, an embodiment of this application provides a battery cover assembly, including: a cover plate 1, a terminal post 2, and a connecting piece 3; wherein, the terminal post 2 is mounted on the cover plate 1, and one of the terminal post 2 and the connecting piece 3 forms an anti-detachment protrusion 21, and the other forms an anti-detachment mounting hole 33, and the anti-detachment protrusion 21 is inserted into and connected to the anti-detachment mounting hole 33.

[0038] As can be seen from the structure described above, in the battery cover assembly provided in this application, an anti-detachment protrusion 21 is added to one of the connecting piece 3 and the terminal post 2, and an anti-detachment mounting hole 33 is added to the other. The anti-detachment protrusion 21 and the anti-detachment mounting hole 33 form a firm connection structure, which is less prone to detachment than the previous planar fit, and the structure is more reliable. This can avoid the problem of increased internal resistance and temperature rise of the battery during use, and ultimately ensure the performance of the battery. Moreover, the anti-detachment protrusion 21 and the anti-detachment mounting hole 33 can also play a positioning role during the assembly process, so that the connecting piece 3 and the terminal post 2 will not be misaligned during the assembly process, which greatly improves the assembly accuracy and yield.

[0039] Furthermore, preferably, the pole post 2 is formed with an anti-detachment protrusion 21, and the connecting piece 3 is formed with an anti-detachment mounting hole 33. This will be used as an example in the following description. Of course, it is not limited to this. The pole post 2 can also be formed with an anti-detachment mounting hole 33, and the connecting piece 3 can be formed with an anti-detachment protrusion 21. The specific choice depends on the actual needs.

[0040] In this embodiment, preferably, as follows: Figure 1 and Figure 2 As shown, the battery cover assembly also includes a first insulating member 4 and a heat-insulating member 5; wherein, the first insulating member 4 is installed on the side of the cover 1 near the electrode group; a portion of the connecting piece 3 is disposed on the side of the first insulating member 4 near the electrode group, and a heat-insulating member 5 is disposed between the two.

[0041] As can be seen from the structure described above, the heat insulation component 5 separates the connecting piece 3 from the first insulation component 4, so as to prevent the heat generated when the connecting piece 3 is welded to the pole 2 from being conducted to the first insulation component 4, that is, to prevent the first insulation component 4 from being damaged by heat.

[0042] Furthermore, preferably, the thermal insulation component 5 can be a ring structure, which surrounds the outer periphery of the first mating portion 31. Of course, it is not limited to this.

[0043] Furthermore, preferably, the first insulating element 4 can be a plastic part, that is, the lower plastic. Of course, it is not limited to this and can be selected according to actual needs.

[0044] In this embodiment, preferably, as follows: Figure 1 and Figure 2As shown, the first insulating member 4 has a mounting groove 41, and the heat-insulating insulating member 5 is disposed in the mounting groove 41. It can be seen that the opening of the mounting groove 41 is disposed facing one side of the electrode assembly, and the heat-insulating insulating member 5 is disposed in the mounting groove 41.

[0045] As described above, installing the heat insulation component 5 within the mounting groove 41 makes it more secure and stable, preventing displacement. However, this is not the only option; the mounting groove 41 can also be provided on the connecting piece 3, or neither the first insulation component 4 nor the connecting piece 3 may have the aforementioned mounting groove 41. The choice depends on the specific needs.

[0046] In this embodiment, preferably, as follows: Figure 2 As shown, the heat insulation component 5 and the first insulation component 4 are connected by integral molding or hot melting, making the heat insulation component 5 more robust and stable.

[0047] In this embodiment, preferably, as follows: Figures 2 to 4 As shown, the connecting piece 3 includes a first mating part 31 and a second mating part 32 connected to each other. The first mating part 31 is formed with an anti-detachment mounting hole 33, the cover plate 1 is formed with a first mounting through hole, and the first insulating member 4 is formed with a clearance through hole. The first mating part 31 is installed in the first mounting through hole and the clearance through hole in sequence. The second mating part 32 is disposed on the side of the first insulating member 4 near the electrode group, and a heat insulation insulating member 5 is disposed between the two.

[0048] As can be seen from the structure described above, the first mating part 31 is used to mate with the pole post 2, and the second mating part 32 is used to mate with the pole lug of the pole assembly.

[0049] Furthermore, preferably, the first mating part 31 is a hollow cylindrical structure, and the bottom of the first mating part 31 is formed with the aforementioned anti-detachment mounting hole 33.

[0050] Furthermore, preferably, the second mating part 32 is a flat plate structure, that is, the second mating part 32 is a flanged structure provided at the open end of the aforementioned cylindrical first mating part 31.

[0051] Furthermore, preferably, the first mating part 31 and the second mating part 32 are an integral structure.

[0052] In this embodiment, preferably, as follows: Figure 2 As shown, the material of the heat insulation component 5 is silicone or high-temperature resin. Of course, it is not limited to this and can be selected according to actual needs.

[0053] In this embodiment, preferably, as follows: Figure 2As shown, the battery cover assembly also includes a support ring 6, a second insulating element 7, and a sealing ring 8; wherein, the pole post 2 is installed on the side of the cover 1 away from the pole group; the cover 1 has a second mounting through hole surrounding and communicating with the first mounting through hole; the support ring 6 is disposed in the second mounting through hole and connected to the cover 1.

[0054] A portion of the support ring 6 extends to the outer side of the cover plate 1 away from the electrode assembly, and the second insulating member 7 wraps around the outer part of the support ring 6 exposed on the outer side of the cover plate 1 to form an insulating structure, and the insulating structure surrounds the outside of the pole post 2; the sealing ring 8 is sleeved on the outside of the end of the pole post 2 near the electrode assembly and is compressed between the support ring 6 and the pole post 2, and the sealing ring 8 is blocked between the first mating part 31 of the connecting piece 3 and the support ring 6.

[0055] As can be seen from the structure described above, the support ring 6 serves as the skeleton for supporting the second insulating component 7. The second insulating component 7 is wrapped around the outside of the support ring 6 and surrounds the outer periphery of the pole post 2, thus playing a role in insulation and protection. The sealing ring 8 is pressed between the pole post 2 and the support ring 6, thus playing a role in sealing. At the same time, the sealing ring 8 separates the pole post 2 and the connecting piece 3 from the support ring 6, thus playing a role in insulation and protection.

[0056] Furthermore, preferably, the support ring 6 can be connected to the cover plate 1 by welding, and the second insulating part 7 is a plastic part, which can be connected to the support ring 6 by injection molding. Of course, it is not limited to this.

[0057] In this embodiment, preferably, as follows: Figure 2 and Figure 5 As shown, a mating ring 22 is formed on the outer wall of the end of the pole post 2 near the pole group, and a mating groove is formed in the insulating structure. The mating ring 22 is disposed in the mating groove to form an interlocking structure.

[0058] As can be seen from the structure described above, the support ring 6 and the second insulating component 7 form an insulating structure, and this insulating structure and the side wall of the pole post 2 form an interlocking structure, which makes the two fit together more firmly and stably, plays a role in mutually limiting each other, avoids separation, and makes the structure more reliable.

[0059] In this embodiment, preferably, the anti-detachment protrusion 21 and the hole wall of the anti-detachment mounting hole 33 are connected by hot melting or welding, making the connection more secure and the operation simple and convenient.

[0060] In this embodiment, preferably, as follows: Figure 5 As shown, the end of the pole post 2 furthest from the pole group has a mating protrusion 23, which is used to mate with the mounting hole on the connecting bar.

[0061] As can be seen from the structure described above, the mounting holes on the connecting strip can be fitted onto the mating protrusions 23 before welding, making the welded structure more robust and stable. Moreover, the mating protrusions 23 and the mounting holes can also serve as welding positioning.

[0062] Furthermore, preferably, the pole post 2 is cylindrical. Correspondingly, the mating protrusion 23 can be designed as a cylindrical protrusion structure. Of course, it is not limited to this. The shape of the mating protrusion 23 can be designed arbitrarily. In addition, it should be noted that the shape of the pole post 2 is not limited to the above and can also be designed according to actual needs.

[0063] In this embodiment, preferably, as follows: Figures 3 to 6 As shown, there are multiple anti-detachment mounting holes 33 and multiple anti-detachment protrusions 21, and they are all evenly distributed. Furthermore, the multiple anti-detachment mounting holes 33 correspond one-to-one with the multiple anti-detachment protrusions 21.

[0064] As can be seen from the structure described above, the combination of multiple evenly distributed anti-detachment mounting holes 33 and multiple evenly distributed anti-detachment protrusions 21 makes the structure more stable after welding or hot melting, and less prone to deformation.

[0065] Of course, the multiple anti-detachment mounting holes 33 and multiple anti-detachment protrusions 21 can be distributed arbitrarily, depending on the actual needs. It should also be noted that the anti-detachment mounting holes 33 and anti-detachment protrusions 21 can also be one, depending on the actual needs.

[0066] Example 2

[0067] Embodiment 2 of this application also provides a battery, including the battery cover assembly described in Embodiment 1 above, wherein the electrode group is installed inside the housing, and the battery cover assembly covers the opening end of the housing, and the electrode tabs of the electrode group are connected to the connecting piece 3 by welding. Therefore, it possesses all the beneficial technical effects of this battery cover assembly, and the same technical features and beneficial effects will not be repeated.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery cover plate assembly, characterized by, include: The device includes a cover plate, a pole, and a connecting piece; wherein the pole is mounted on the cover plate, and one of the pole and the connecting piece has an anti-detachment protrusion, while the other has an anti-detachment mounting hole, and the anti-detachment protrusion is inserted into and connected to the anti-detachment mounting hole.

2. The battery cover plate assembly of claim 1, wherein, The battery cover assembly further includes a first insulating member and a heat-insulating member; wherein, the first insulating member is installed on the side of the cover near the electrode group; a portion of the connecting piece is disposed on the side of the first insulating member near the electrode group, and the heat-insulating member is disposed between the two.

3. The battery cover plate assembly of claim 2, wherein, The first insulating member has a mounting groove, and the heat-insulating insulating member is disposed within the mounting groove.

4. The battery cover plate assembly of claim 2, wherein, The heat insulation component is integrally formed or hot-melt connected to the first insulation component.

5. The battery cover plate assembly of claim 2, wherein, The connecting piece includes a first mating part and a second mating part that are connected to each other. The first mating part is formed with the anti-drop protrusion or the anti-drop mounting hole. The cover plate has a first mounting through hole, the first insulating member has a clearance through hole, and the first mating part is sequentially installed in the first mounting through hole and the clearance through hole; the second mating part is disposed on the side of the first insulating member near the electrode assembly, and the heat-insulating insulating member is disposed between the two; and / or The heat insulation component is made of silicone or high-temperature resin.

6. The battery cover plate assembly of claim 5, wherein, The battery cover assembly further includes a support ring, a second insulating element, and a sealing ring; wherein, the electrode post is installed on the side of the cover away from the electrode group; the cover has a second mounting through hole surrounding and communicating with the first mounting through hole; the support ring is disposed in the second mounting through hole and connected to the cover; A portion of the support ring extends to the outside of the cover plate away from the electrode assembly, and the second insulating member wraps around the outside of the portion of the support ring exposed on the outside of the cover plate to form an insulating structure, and the insulating structure surrounds the outside of the pole post; the sealing ring is fitted around the outside of the end of the pole post near the electrode assembly and is compressed between the support ring and the pole post, and the sealing ring is blocked between the first mating portion of the connecting piece and the support ring.

7. The battery cover plate assembly of claim 6, wherein, The outer wall of the pole near the pole assembly has a mating ring portion, and the insulating structure has a mating groove, with the mating ring portion disposed within the mating groove to form an interlocking structure.

8. The battery cover plate assembly of claim 1, wherein, The anti-fall-off protrusion is connected to the wall of the anti-fall-off mounting hole by heat fusion or welding; and / or The end of the pole away from the pole group has a mating protrusion for mating with the mounting hole on the connecting bar.

9. The battery cover plate assembly of any one of claims 1-8, wherein, The pole post has the anti-detachment protrusion, and the connecting piece has the anti-detachment mounting hole; and / or The number of anti-detachment mounting holes and anti-detachment protrusions are both multiple and are evenly distributed, and the multiple anti-detachment mounting holes correspond one-to-one with the multiple anti-detachment protrusions.

10. A battery, characterized by The device includes a housing, an electrode assembly, and a battery cover assembly as described in any one of claims 1 to 9; wherein the electrode assembly is installed inside the housing, and the battery cover assembly covers the opening of the housing, and the electrode tabs of the electrode assembly are connected to the connecting piece by welding.

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