Top cover of battery and battery

Abstract

The utility model relates to the field of batteries, particularly provides a top cover of a battery and the battery, and aims to solve the problem that a top cover of an existing battery is relatively heavy. In order to achieve the purpose, the top cover of the battery comprises a cover shell, a pole module and an adapter plate, a through hole is formed in the cover shell; the pole module is connected to the through hole and is provided with a pole; the switching piece comprises a switching body and a switching boss, the switching body is arranged on the back side of the cover shell, and the switching boss is located in the through hole and connected to the pole. By means of the arrangement, the pole does not need to penetrate through the through hole, and the pole can be effectively thinned; according to the design of the pole module, the redundant part in the traditional design can be eliminated, and the weight of the top cover is effectively reduced by simplifying the structure and reducing unnecessary reinforcing or connecting pieces.

Description

Technical Field

[0001] This application relates to the field of batteries, and specifically provides a top cover and a battery for a battery. Background Art

[0002] In the field of battery technology, the weight of the battery top cover has an important impact on the overall performance and user experience of the battery. Traditional battery top covers usually use heavier materials. However, a heavier battery top cover not only increases the overall weight of the battery, but may also occupy more internal space of the battery, thereby reducing the space available for storing energy inside the battery. This not only reduces the energy density of the battery, but may also result in less energy provided by the battery under the same volume.

[0003] Correspondingly, there is a need in the art for a new top cover and battery for a battery to solve the problem of the heavy weight of the existing battery top cover. Summary of the Utility Model

[0004] This application aims to solve the above technical problems, that is, to solve the problem of the heavy weight of the existing battery top cover.

[0005] In a first aspect, this application provides a top cover for a battery, which is characterized in that it includes: a cover shell, with a through hole provided on the cover shell; a pole module, the pole module is connected to the through hole, and the pole module has a pole; a transfer piece, the transfer piece includes a transfer body and a transfer boss, the transfer body is provided on the back side of the cover shell, and the transfer boss is located in the through hole and connected to the pole.

[0006] In the top cover of the battery of this application, the transfer body is provided on the back side of the cover shell, the transfer boss is located in the through hole and connected to the pole, so that the pole does not have to pass through the through hole, and an effective thinning treatment can be performed on the pole. Among them, the design of the pole module can eliminate redundant parts in the traditional design, and by streamlining the structure and reducing unnecessary reinforcement or connecting parts, the weight of the top cover can be effectively reduced. In addition, the modular design of the pole module enables its various structures to jointly support the pole, and each structure can share part of the stress, thereby reducing the load borne by a single thinned pole and improving the structural stability of the top cover. Further, through the modular design, the production efficiency of the battery is higher, and at the same time, the overall scrap rate of the top cover is reduced, thereby reducing the production cost of the battery and increasing the profit margin.

[0007] In an alternative technical solution of the above top cover of the battery, the transfer body includes a first surface and a second surface opposite to each other, the transfer boss is formed on the first surface, and a transfer groove is formed at a position corresponding to the transfer boss on the second surface.

[0008] The design of the transfer groove can reduce the material usage, thereby effectively reducing the overall weight of the top cover and increasing the energy density of the battery. In addition, this design of the transfer piece can be achieved by stamping, simplifying the manufacturing process and reducing the manufacturing cost.

[0009] In an alternative technical solution of the top cover of the above battery, the bottom of the pole column is configured as a first plane, the top surface of the transfer boss is configured as a second plane, and the first plane is in contact with the second plane.

[0010] The contact between the first plane and the second plane provides a large contact area, which can effectively disperse and transfer stress, avoid stress concentration, and can also fix the position of the pole column, reducing its possible shaking or displacement during use, thereby improving the stability of the overall structure. In addition, the contact between the planes provides a large contact area, ensuring that current can be conducted efficiently and stably, reducing the contact resistance, and improving the performance of the battery.

[0011] In an alternative technical solution of the top cover of the above battery, the first plane is connected to the second plane by welding.

[0012] Since the first plane is connected to the second plane by welding, there is no need for additional connecting parts (such as screws or brackets), thereby reducing the total weight. And the welding connection method can provide an extremely firm mechanical connection, ensuring seamless contact between the first plane and the second plane, avoiding any loosening or displacement, and thus improving the strength and stability of the overall structure.

[0013] In an alternative technical solution of the top cover of the above battery, the pole column module further includes an upper plastic, a sealing ring and a connecting ring. The connecting ring is sleeved outside the pole column, the sealing ring is pressed between the connecting ring and the pole column, a filling space is formed between the pole column, the connecting ring and the sealing ring, the upper plastic is filled in the filling space, and the connecting ring is connected to the through hole.

[0014] This setting method can avoid using additional reinforcement parts and connecting parts, reducing the use of overall materials. Among them, lightweight materials such as plastics and high-efficiency sealing rings can be used to significantly reduce the overall weight while ensuring strength and sealing performance. In addition, this integrated design makes the components more compact, reducing the redundant structure and space waste that may exist in the traditional design, thereby further reducing the weight. It can also facilitate the implementation of modular design, making the production efficiency of the battery higher, and at the same time reducing the overall scrap rate of the top cover, thereby reducing the production cost of the battery and increasing the profit margin.

[0015] In the optional technical solution of the top cover of the above-mentioned battery, the connecting ring includes a connecting body and a first bent portion bent inwardly from the connecting body, an annular groove is formed in the upper plastic, and the shape formed by the connecting body and the first bent portion is adapted to the annular groove, the pole includes a base and a pole boss provided on the base, the first bent portion is located above the base, and the upper plastic is in contact with the pole boss and the base.

[0016] Since the first bent portion of the connecting ring is located above the pole base, the pole can be effectively fixed by the inner bending design, and the annular groove in the upper plastic is adapted to the shape of the connecting body and the first bent portion, providing double fixation and significantly enhancing the ability of the pole to prevent it from falling out.

[0017] In an optional technical solution of the top cover of the above-mentioned battery, the connecting ring also includes a second bending portion, the second bending portion is formed on the inner side of the other end of the connecting body relative to the first bending portion, the second bending portion is located below the base, and the sealing ring is pressed between the second bending portion and the base.

[0018] The above arrangement enables the pole base to be clamped up and down, forming a double lock up and down, greatly enhancing the stability of the pole. It can also effectively disperse the stress on the pole, avoid stress concentration in one position, and reduce the risk of damage to the pole. In addition, it can also effectively compress the sealing ring between the second bend and the base to prevent any leakage or contaminants from entering.

[0019] In an optional technical solution of the top cover of the above-mentioned battery, the connecting ring also includes a third bending portion, the third bending portion is formed on the outer side of the other end of the connecting body relative to the first bending portion, and a connecting groove is provided on the bottom side of the through hole, and the third bending portion is connected to the connecting groove.

[0020] The above arrangement can effectively fix the pole module in the through hole, enhancing the stability of the structure. And because the bottom side of the through hole of the battery cover is provided with a connecting groove, the third bent portion is fixedly connected to the connecting groove, which can prevent the pole module from falling out of the through hole.

[0021] In an optional technical solution of the top cover of the above-mentioned battery, a tangent surface and a first curved surface protruding outward are formed on the circumference of the outer wall of the pole, and the tangent surface is connected to the first curved surface end to end, and a convex surface and a second curved surface concave inward are formed on the circumference of the upper plastic, and the convex surface is connected to the second curved surface end to end, the tangent surface is in contact with the convex surface, and the first curved surface is in contact with the second curved surface.

[0022] The above arrangement can ensure that the relative position between the upper plastic and the pole is fixed, making the structure more stable, and making the stress distribution between the upper plastic and the pole more uniform, reducing material fatigue and structural damage, and extending the service life of the product.

[0023] In an optional technical solution of the top cover of the above-mentioned battery, a first limiting protrusion is formed on the side wall within the annular groove, a first limiting groove is formed on the connecting ring, and the first limiting protrusion is arranged in the first limiting groove; or a second limiting groove is formed on the side wall within the annular groove, a second limiting protrusion is formed on the connecting ring, and the second limiting protrusion is arranged in the second limiting groove.

[0024] The above-mentioned setting method can further improve the relative stability of the upper plastic and the connecting ring, and through the multi-point limit design, effectively distribute the stress evenly in different parts of the module, greatly improving the deformation resistance and durability of the component, so that the integrity of the structure can be maintained under various stress conditions, ensuring safety of use.

[0025] In an optional technical solution of the top cover of the above-mentioned battery, the top cover also includes a lower plastic, which is arranged between the adapter body and the cover shell, and the lower plastic is provided with a receiving hole extending in the direction away from the adapter body, the receiving hole is arranged in the ring of the connecting ring, and the adapter boss is arranged in the receiving hole.

[0026] Since the accommodating hole is arranged between the connecting ring and the adapter boss, it can prevent the adapter plate from contacting the connecting ring, effectively prevent the occurrence of electrical short circuit, and improve the safety and reliability of the battery, especially in a high-load working environment.

[0027] On the other hand, the present application also provides a battery, comprising the top cover of the battery described in any of the above embodiments.

[0028] After the battery has the above-mentioned top cover, the overall weight can be reduced, the energy density can be improved, and the stability of the overall structure can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The preferred embodiments of the present application are described below in conjunction with the accompanying drawings, in which:

[0030] Figure 1 is a cross-sectional view of one end of the top cover of the present application;

[0031] Figure 2 It is a schematic diagram of the structure of the pole of the present application;

[0032] Figure 3 It is a schematic diagram of the structure of the connecting ring of the present application;

[0033] Figure 4 It is a cross-sectional view of the connecting ring of the present application;

[0034] Figure 5 It is a schematic structural diagram of the upper plastic of the present application;

[0035] Figure 6 It is a schematic structural diagram of the cover shell of the present application;

[0036] Figure 7 It is a schematic structural diagram of the adapter plate of the present application;

[0037] Figure 8 It is a schematic structural diagram of the lower plastic of the present application;

[0038] Figure 9 It is a bottom view of one end of the top cover of the present application.

[0039] Explanation of reference numerals:

[0040] 1 - pole column; 11 - base; 111 - cutting plane; 112 - first arc surface; 12 - pole column boss; 2 - connecting ring; 21 - connecting body; 211 - first limiting groove; 22 - first bending part; 23 - second bending part; 24 - third bending part; 3 - upper plastic; 31 - inner ring body; 311 - protruding surface; 312 - second arc surface; 313 - first limiting protrusion; 32 - outer ring body; 33 - connecting body; 34 - annular groove; 4 - cover shell; 41 - through hole; 42 - connecting groove; 5 - adapter plate; 51 - adapter body; 52 - adapter boss; 53 - adapter groove; 54 - first surface; 55 - second surface; 6 - lower plastic; 61 - accommodating hole; 7 - sealing ring. Detailed implementation manners

[0041] First of all, it should be noted that the following implementation manners are only used to explain the technical principle of the present application and are not intended to limit the protection scope of the present application. In order to better illustrate the present application, numerous specific details are given in the following detailed implementation manners. Those skilled in the art should understand that the present application can also be implemented without some specific details.

[0042] It should be noted that in the description of the present application, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0043] It should be noted that in the description of the present application, "upper" and "top" refer to the direction away from the battery cell in the thickness direction of the cover shell 44, and "lower" and "bottom" refer to the direction close to the battery cell in the thickness direction of the cover shell 4.

[0044] The present application provides a battery, and the battery is preferably a square lithium-ion battery. The battery includes a top cover, as Figures 1 to 9As shown in the figure, the top cover includes a cover shell 4, a pole module, and a transfer piece 5. The cover shell 4 can be a light aluminum sheet. A through hole 41 is provided on the cover shell 4. The transfer piece 5 includes a transfer body 51 and a transfer boss 52. The transfer body 51 includes an opposite first surface 54 and a second surface 55. The transfer boss 52 is formed on the first surface. The transfer body 51 is arranged on the back side of the cover shell 4, and the transfer boss 52 is located in the through hole 41 and connected to the pole 1 in the pole module. Among them, the transfer boss 52 can be located at the middle position of the transfer body 51. In addition, a first connecting arm and a second connecting arm can be provided on the transfer body 51. The first connecting arm and the second connecting arm can be arranged on the same side. The first connecting arm and the second connecting arm are used to be fixedly connected to the pole ears of the bare battery cell respectively. It can be understood that the first surface 54 and the second surface 55 refer to two opposite surfaces in the thickness direction of the transfer body 51, that is, the front and back surfaces of the transfer body 51. Among them, the front surface of the transfer body 51 faces the cover shell, and the back surface of the transfer body 51 faces away from the cover shell.

[0045] The pole is used to provide current conduction inside the battery. In order to achieve current conduction, the pole needs to be arranged on the front side of the cover shell, and the transfer piece needs to be fixed on the back side of the cover shell. Therefore, in order to connect the pole and the transfer piece, in the prior art, the pole passes through the through hole on the cover shell and is connected to the transfer piece such as by bolts, making the overall weight heavier. In this application, the transfer body 51 is arranged on the back side of the cover shell 4, and the transfer boss 52 is located in the through hole 41 and connected to the pole 1, so that the pole 1 does not need to pass through the through hole 41, and the pole 1 can be effectively thinned; among them, the design of the pole module can eliminate the redundant parts in the traditional design, and by streamlining the structure and reducing unnecessary reinforcement or connecting parts, the weight of the top cover can be effectively reduced. In addition, the modular design of the pole module can enable its various structures to jointly support the pole 1, and each structure can share part of the stress, thereby reducing the load borne by the single thinned pole 1 and improving the structural stability of the top cover. And through the modular design, the production efficiency of the battery is higher, and at the same time, the overall scrap rate of the top cover is reduced, thereby reducing the production cost of the battery and increasing the profit margin.

[0046] As a possible implementation manner, a transfer groove 53 is formed at the position of the second surface 55 corresponding to the transfer boss 52. The design of the transfer groove 53 can reduce the material usage, thereby effectively reducing the overall weight of the top cover and improving the energy density of the battery. In addition, this design of the transfer piece 5 can be realized by stamping, simplifying the manufacturing process and reducing the manufacturing cost.

[0047] As a possible implementation, the bottom of the pole 1 is formed as a first plane, the top surface of the transfer boss 52 is formed as a second plane, and the first plane is fitted with the second plane. The fitting of the first plane and the second plane provides a large contact surface, which can effectively disperse and transfer stress, avoid stress concentration, and fix the position of the pole 1, reducing its possible shaking or displacement during use, thereby improving the stability of the overall structure. In addition, the fitting between the planes provides a larger contact area, ensuring that the current can be efficiently and stably conducted, reducing contact resistance, and improving battery performance.

[0048] As a possible implementation, the first plane is connected to the second plane by welding. Since the first plane is connected to the second plane by welding, no additional connecting parts (such as screws or brackets) are required, thereby reducing the total weight. In addition, the welding connection method can provide an extremely strong mechanical connection, ensuring seamless fit between the first plane and the second plane, avoiding any looseness or displacement, thereby improving the strength and stability of the overall structure.

[0049] As a possible implementation, the pole module includes an upper plastic 3, a sealing ring 7, a connecting ring 2 and a pole 1, the connecting ring 2 is sleeved outside the pole 1, the sealing ring 7 is pressed between the connecting ring 2 and the pole 1, a filling space is formed between the pole 1, the connecting ring 2 and the sealing ring 7, the upper plastic 3 is filled in the filling space, and the connecting ring 2 is connected to the through hole 41. The sealing ring 7 is preferably a hollow ring, so as to facilitate compression and fitting to prevent the electrolyte inside the battery from overflowing.

[0050] This arrangement avoids the use of additional reinforcements and connectors, reduces the overall material usage, and can use lightweight materials such as plastic and high-efficiency sealing rings 7, significantly reducing the overall weight while ensuring strength and sealing performance. In addition, this integrated design makes the components more compact, reduces the redundant structure and space waste that may exist in traditional designs, and further reduces weight.

[0051] As a possible embodiment, the connecting ring 2 includes a connecting body 21 and a first bent portion 22 bent inwardly by the connecting body 21, and the bending angle of the first bent portion 22 can be 45°-90°; an annular groove 34 is formed in the upper plastic 3, and the shape formed by the connecting body 21 and the first bent portion 22 is adapted to the annular groove 34, and the pole 1 includes a base 11 and a pole boss 12 provided on the base 11, and the first bent portion 22 is located above the base 11 to prevent the pole 1 from escaping through the through hole 41, and the upper plastic 3 fits the pole boss 12 and the base 11. Further, a top boss can be provided on the top surface of the pole boss 12. It can be understood that in the case where the pole 1 includes the base 11 and the pole boss 12, the weight reduction groove is formed at the bottom of the base 11.

[0052] Since the first bent portion 22 of the connecting ring 2 is located above the base 11 of the terminal post 1, the terminal post 1 can be effectively fixed through the design of inner-side bending. The annular groove 34 in the upper plastic 3 is adapted to the shapes of the connecting body 21 and the first bent portion 22, providing double fixation and significantly enhancing the anti-disengagement ability of the terminal post 1.

[0053] Possibly, the upper plastic 3 includes an inner ring body 31, an outer ring body 32 and a connecting body 33. The end portions on the same side of the outer ring body 32 and the inner ring body 31 are bent inwards, and the connecting body 33 is connected to these two end portions. The above-mentioned annular groove 34 is formed between the inner ring body 31, the outer ring body 32 and the connecting body 33. The surface of the inner ring body 31 away from the outer ring body 32 in the thickness direction fits with the side surface and the top surface of the base 11. The surface of the inner ring body 31 close to the outer ring body 32 in the thickness direction fits with the connecting ring 2. The surface of the outer ring body 32 close to the inner ring body 31 in the thickness direction fits with the connecting ring 2. The connecting body 33 fits with the cylindrical surface of the terminal post boss 12.

[0054] As a possible implementation manner, the connecting ring 2 further includes a second bent portion 23. The second bent portion 23 is formed on the inner side of the other end of the connecting body 21 relative to the first bent portion 22. The second bent portion 23 is located below the base 11, and the sealing ring 7 is pressed between the second bent portion 23 and the base 11.

[0055] The above setting method can clamp the base 11 of the terminal post 1 up and down, forming double locking up and down, greatly enhancing the stability of the terminal post 1. And it can effectively disperse the stress on the terminal post 1, avoid stress concentration at one position, and reduce the damage risk of the terminal post 1. In addition, it can also effectively press the sealing ring 7 between the second bent portion 23 and the base 11 to prevent any leakage or contaminants from entering.

[0056] As a possible implementation manner, the connecting ring 2 further includes a third bent portion 24. The third bent portion 24 is formed on the outer side of the other end of the connecting body 21 relative to the first bent portion 22. A connecting groove 42 is provided at the bottom side of the through hole 41, and the third bent portion 24 is connected to the connecting groove 42, for example, by welding connection, but this is not restrictive. As long as the fixed connection between the third bent portion 24 and the connecting groove 42 can be achieved, the connection method can be changed, such as riveting, etc. Specifically, the outer cross section of the third bent portion 24 can fit with the side surface of the connecting groove 42, and the upper surface of the third bent portion 24 can fit with the upper end surface of the connecting groove 42. In addition, the lower end surface of the outer ring body 32 can fit with the remaining upper surface of the third bent portion 24, and a gap of 0.2 mm - 0.5 mm can be left between the outer ring body 32 and the through hole 41 of the cover shell 4 for convenient installation.

[0057] With the above setting method, the pole module can be effectively fixed in the through hole 41, enhancing the structural stability. And since the connection groove 42 is provided at the bottom side of the through hole 41 of the battery cover 4, and the third bent portion 24 is fixedly connected to the connection groove 42, the pole module can be prevented from disengaging from the through hole 41.

[0058] During the injection molding process, first, the sealing ring 7 is pressed tightly between the second bent portion 23 and the base 11, and then the sealing ring 7, the pole 1, and the connection ring 2 are placed into the injection mold for injection molding. After the plastic material is cured, it can wrap the connection ring 2 and form an assembly including the pole 1, the sealing ring 7, the upper plastic 3, and the connection ring 2. Then, their assembly can be fixed to the connection groove 42 of the cover 4 by welding, thus completing the assembly of the main structural parts of the top cover. This makes the production efficiency of the battery higher, while reducing the overall scrap rate of the top cover, thereby reducing the production cost of the battery and increasing the profit margin.

[0059] As a possible implementation, referring to Figure 2 , on the outer wall circumference of the pole 1, a cut surface 111 and a first arc surface 112 protruding outward are formed. The cut surface 111 and the first arc surface 112 are connected end to end. Referring to Figure 5 , on the circumference of the upper plastic 3, a convex surface 311 and a second arc surface 312 recessed inward are formed. The convex surface 311 and the second arc surface 312 are connected end to end. The cut surface 111 is in contact with the convex surface 311, and the first arc surface 112 is in contact with the second arc surface 312.

[0060] With the above setting method, the relative position between the upper plastic 3 and the pole 1 can be ensured to be fixed, preventing relative rotation between the pole 1 and the upper plastic 3, making the structure more stable. And it makes the stress distribution between the upper plastic 3 and the pole 1 more uniform, reducing material fatigue and structural damage, and prolonging the service life of the product.

[0061] Preferably, the cut surface 111 and the first arc surface 112 are formed on the outer circumference of the base 11. The outer circumference of the base 11 can be circular as a whole. One cut surface 111 is arranged at intervals of the first arc surface 112 in the circumference of this circle. The numbers of both the cut surface 111 and the first arc surface 112 are greater than 1. The above convex surface 311 and the second arc surface 312 can be arranged on the surface of the inner ring body 31 of the upper plastic 3 away from the outer ring body 32 in the thickness direction. Preferably, the numbers of both the convex surface 311 and the second arc surface 312 segments are greater than 1. Each cut surface 111 is in close contact with each convex surface 311 one by one, and each first arc surface 112 is in close contact with each second arc surface 312 one by one, thus realizing a multi-point contact design, making the structure more uniform when stressed, reducing local stress concentration, and further improving stability.

[0062] As a possible implementation, referring to 3 and Figure 5, a first limiting protrusion 313 is formed on the side wall inside the annular groove 34, a first limiting groove 211 is formed on the connecting ring 2, and the first limiting protrusion 313 is disposed in the first limiting groove 211. Possibly, the first limiting protrusion 313 is arranged on the surface of the inner ring body 31 close to the outer ring body 32 in the thickness direction, the first limiting groove 211 is arranged on the inner surface of the connecting body 21, and the first limiting protrusion 313 cooperates with the first limiting groove 211, so as to further improve the relative stability between the upper plastic 3 and the connecting ring 2 and prevent relative rotation between the upper plastic 3 and the connecting ring 2. It should be noted that the setting positions of the above-mentioned first limiting protrusion 313 and first limiting groove 211 are only exemplary and are not intended to limit the protection scope of the present application. For example, the first limiting protrusion 313 can be arranged on the outer ring body 32, and the first limiting groove 211 can be arranged on the outer surface of the connecting body 21, etc. These adjustments do not deviate from the principle of the present application and are all within the protection scope of the present application.

[0063] As a possible implementation manner, a second limiting groove is formed on the side wall inside the annular groove 34, a second limiting protrusion is formed on the connecting ring 2, and the second limiting protrusion is disposed in the second limiting groove. Possibly, the second limiting groove is arranged on the surface of the inner ring body 31 close to the outer ring body 32 in the thickness direction, the second limiting protrusion is arranged on the inner surface of the connecting body 21, and the second limiting groove cooperates with the second limiting protrusion, so as to further improve the relative stability between the upper plastic 3 and the connecting ring 2 and prevent relative rotation between the upper plastic 3 and the connecting ring 2. It should be noted that the setting positions of the above-mentioned second limiting groove and second limiting protrusion are only exemplary and are not intended to limit the protection scope of the present application. For example, the second limiting groove can be arranged on the outer ring body 32, and the second limiting protrusion can be arranged on the outer surface of the connecting body 21, etc. These adjustments do not deviate from the principle of the present application and are all within the protection scope of the present application.

[0064] In summary, the above setting method can further improve the relative stability between the upper plastic 3 and the connecting ring 2, and through the design of multi-point limiting, the stress is effectively evenly distributed on different parts of the module, greatly improving the anti-deformation ability and durability of the component, so that the structural integrity is maintained under various stress conditions and the use safety is ensured.

[0065] As a possible implementation, the top cover further includes a lower plastic 6, which is disposed between the adapter body 51 and the cover shell 4. The lower plastic 6 is provided with a receiving hole 61 extending in a direction away from the adapter body 51, that is, extending upward. The receiving hole 61 is disposed within the ring of the connecting ring 2, and the adapter boss 52 is disposed within the receiving hole 61. Since the receiving hole 61 is disposed between the connecting ring 2 and the adapter boss 52, it can prevent the adapter piece 5 from contacting the connecting ring 2, effectively preventing the occurrence of electrical short - circuit phenomena, improving the safety and reliability of the battery, especially performing more excellently in a high - load working environment.

[0066] Among them, the height of the receiving hole 61 can be 1 mm - 1.5 mm. There is a gap between the outer surface of the receiving hole 61 and the cross - section of the second bending portion 23, for example, a gap of 0.1 mm - 1 mm, which is convenient for assembly. The lower plastic 6 and the cover shell 4 can be fixedly connected by ultrasonic welding. However, this is not restrictive. As long as the lower plastic 6 can be fixedly connected to the cover shell 4, its connection method can be adjusted, such as riveting, laser spot welding, press - fitting connection, etc. These adjustments do not deviate from the principle of the present application and are all within the protection scope of the present application.

[0067] It should be noted that the specific implementation manner of the upper plastic 3 for fixing the relative positions of the pole column 1 and the connecting ring 2 is not immutable, and its setting method can be adjusted. For example, fixing grooves are formed on the side wall of the pole column 1 and the connecting ring 2, and fixing columns are formed on the relative two sides of the upper plastic 3, such as the inner ring body 31. The two fixing columns are respectively fixed in the fixing grooves of the pole column 1 and the connecting ring 2, etc. These adjustments do not deviate from the principle of the present application and are all within the protection scope of the present application.

[0068] So far, the technical solution of the present application has been described in combination with the preferred implementation manners shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific implementation manners. Without departing from the principle of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present application.

Claims

1. A top cover of a battery, characterized in that, Comprising: A cover shell, on which a through hole is provided; A pole module, which is connected to the through hole, and the pole module has a pole; A transfer piece, which includes a transfer body and a transfer boss. The transfer body is arranged on the back side of the cover shell, and the transfer boss is located in the through hole and connected to the pole.

2. The top cover of the battery according to claim 1, characterized in that The transfer body includes an opposite first surface and a second surface. The transfer boss is formed on the first surface, and a transfer groove is formed at the position corresponding to the transfer boss on the second surface.

3. The top cover of the battery according to claim 1 or 2, characterized in that The bottom of the pole is configured as a first plane, and the top surface of the transfer boss is configured as a second plane, and the first plane is in contact with the second plane.

4. The top cover of the battery according to claim 1, characterized in that The pole module further includes an upper plastic, a sealing ring and a connecting ring. The connecting ring is sleeved outside the pole, the sealing ring is pressed between the connecting ring and the pole, a filling space is formed between the pole, the connecting ring and the sealing ring, the upper plastic is filled in the filling space, and the connecting ring is connected to the through hole.

5. The top cover of the battery according to claim 4, characterized in that The connecting ring includes a connecting body and a first bent portion bent inward from the connecting body. An annular groove is formed in the upper plastic, and the shape formed by the connecting body and the first bent portion is adapted to the annular groove. The pole includes a base and a pole boss arranged on the base. The first bent portion is located above the base, and the upper plastic is in contact with the pole boss and the base.

6. The top cover of the battery according to claim 5, characterized in that The connecting ring further includes a second bent portion, which is formed on the inner side of the other end of the connecting body relative to the first bent portion, and the second bent portion is located below the base, and the sealing ring is pressed between the second bent portion and the base; and / or The connecting ring further includes a third bent portion, which is formed on the outer side of the other end of the connecting body relative to the first bent portion, and a connecting groove is provided on the bottom side of the through hole, and the third bent portion is connected in the connecting groove.

7. The top cover of the battery according to claim 4, characterized in that A cut surface and a first arc surface protruding outward are formed on the outer wall circumference of the pole. The cut surface and the first arc surface are connected end to end. A protruding surface and a second arc surface recessed inward are formed on the circumference of the upper plastic. The protruding surface and the second arc surface are connected end to end. The cut surface is in contact with the protruding surface, and the first arc surface is in contact with the second arc surface.

8. The top cover of the battery according to claim 5, characterized in that A first limiting protrusion is formed on the side wall in the annular groove, and a first limiting groove is formed on the connecting ring, and the first limiting protrusion is arranged in the first limiting groove; or A second limiting groove is formed on the side wall in the annular groove, a second limiting protrusion is formed on the connecting ring, and the second limiting protrusion is arranged in the second limiting groove.

9. The top cover of a battery according to any one of claims 4 to 8, characterized in that: The top cover also includes a lower plastic, which is arranged between the adapter body and the cover shell. The lower plastic is provided with a receiving hole extending in the direction away from the adapter body. The receiving hole is arranged in the ring of the connecting ring, and the adapter boss is arranged in the receiving hole.

10. A battery, characterized in that, The battery comprises the top cover of the battery according to any one of claims 1 to 9.

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