Battery cover plate and battery

Abstract

The utility model discloses a battery cover plate and a battery, the battery cover plate comprises a cover plate body, a bottom plate and a pole, and the bottom plate is positioned on one side, close to a pole group, of the cover plate body; the pole is an integrally formed piece and comprises a plate body and a column body, the column body is connected to the side, close to the pole group, of the plate body, the column body penetrates through the first mounting hole of the cover plate body and the second mounting hole of the bottom plate, the pole comprises a main body part and a coating part, the coating part is located on the side, facing the pole group, of the main body part, and the main body part comprises a flat plate and a convex column; the protruding column is connected to the side, facing the wrapping part, of the flat plate, the wrapping part wraps the peripheral side of the protruding column to form a column body, and the wrapping part extends in the direction of the flat plate and wraps the side face, close to the pole group, of the flat plate to form a plate body; wherein the main body part is an aluminum material piece, and the coating part is a copper material piece. According to the battery cover plate disclosed by the utility model, the connection area of the coating part and the main body part of the pole is increased, so that the connection reliability of the coating part and the main body part is improved, and the safety of the battery is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery cover and a battery. Background Art

[0002] In the related technology, the poles are mostly copper-aluminum composited by friction welding, which is difficult to process, the reliability of the composite surface is poor, and the size of the copper-aluminum joint surface has a great influence on the strength of the composite surface. The composite surface has poor reliability: on the one hand, when charging and discharging at a high rate, a large amount of heat will be generated, causing the pole to melt from the joint surface, and even produce open flames, causing the entire battery to lose control, and then affecting the entire package and the vehicle; on the other hand, the composite surface has low strength. During normal use, the vehicle experiences long-term vibration, impact and other working conditions during driving, and it is easy to break from the composite surface, resulting in a short circuit, which increases the manpower and material costs of after-sales maintenance. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a battery cover plate, which increases the connection area between the covering part and the main body of the pole, so as to improve the reliability of the connection between the covering part and the main body, and improve the safety of the battery.

[0004] The utility model also provides a battery with the battery cover plate.

[0005] According to the battery cover of the first embodiment of the utility model, it includes: a cover body, a first mounting hole is formed on the cover body, a bottom plate, the bottom plate is located on the side of the cover body close to the pole group, and the bottom plate has a second mounting hole connected to the first mounting hole; a pole, the pole is an integrally formed part, the pole includes a plate body and a column, the column is connected to the side of the plate body close to the pole group, the column is penetrated through the first mounting hole and the second mounting hole, the pole includes a main body and a covering part, the covering part is located on the side of the main body facing the pole group, the main body includes a flat plate and A boss, wherein the boss is connected to a side of the flat plate facing the covering portion, the covering portion comprises a first covering portion and a second covering portion connected to each other, the first covering portion covers the side of the flat plate close to the pole group, and is constructed as the plate body together with the flat plate, the second covering portion covers the outer peripheral side of the boss, and is constructed as the column body together with the boss, the second covering portion comprises a covering portion body and a boss connected to a side of the second covering portion body close to the pole group, the boss is passed through the second mounting hole and is fixedly connected to the bottom plate; wherein the main body is an aluminum material, and the covering portion is a copper material.

[0006] According to the battery cover of the embodiment of the utility model, it includes a pole, which is an integrally formed part, and includes a main body and a covering part, wherein the main body is an aluminum material part, and the covering part is a copper material part. The first covering part is covered on the outer surface of the flat plate to form a plate body, and the second covering part is covered on the outer peripheral side of the convex column to form a column body, which can increase the connection area between the covering part and the main body, so that the current capacity of the pole is enhanced, and even in the case of excessive current, the pole will not be melted, thereby avoiding the battery from being out of control; at the same time, it can avoid the pole from peeling off at the connection between the main body and the covering part when the battery is impacted, thereby improving the safety of the battery; the boss of the covering part is fixedly connected to the bottom plate by laser welding, which reduces the processing procedures and costs of the battery cover while ensuring the structural strength.

[0007] According to some embodiments of the present utility model, the main body has a first mating surface, the covering portion has a second mating surface mating with the first mating surface, and the first mating surface and the second mating surface are both step surfaces.

[0008] According to some embodiments of the present invention, in a projection plane parallel to the battery cover, the projection plane of the first mounting hole is located within the projection planes of the first mating surface and the second mating surface.

[0009] According to some embodiments of the present invention, a sealing ring is further included, which is arranged around the column, and at least a part of the sealing ring is located in the first mounting hole.

[0010] According to some embodiments of the present invention, in a projection plane parallel to the battery cover, the projection plane of the first covering portion coincides with the projection plane of the flat plate.

[0011] According to some embodiments of the utility model, in a projection plane parallel to the battery cover, the projection plane of the boss is located in the projection plane of the covering body, so as to define a first limiting portion between the covering body and the boss, and a second limiting portion cooperating with the first limiting portion is provided on the inner wall of the second mounting hole, so as to limit the installation position of the pole.

[0012] According to some embodiments of the present invention, in a projection plane perpendicular to the battery cover, the projection plane of the boss is located within the projection plane of the bottom plate.

[0013] According to some embodiments of the utility model, the first limiting portion is a limiting groove arranged on the outer peripheral side of the second covering portion, and / or the second limiting portion is a limiting protrusion arranged on the inner peripheral wall of the base plate and extending toward the inside of the second mounting hole.

[0014] According to some embodiments of the present invention, a pole lug is connected to one end of the pole group, and the pole lug is fixedly connected to the bottom plate.

[0015] A battery according to an embodiment of the second aspect of the utility model includes: a battery cover according to an embodiment of the first aspect of the utility model.

[0016] According to the battery of the embodiment of the utility model, by providing the above-mentioned battery cover, the connection area between the covering part and the main body can be increased, so that the current carrying capacity of the pole is enhanced. Even in the case of excessive current, the pole will not melt, thereby avoiding the battery from being out of control; at the same time, it can avoid the pole from being peeled off at the connection between the main body and the covering part when the battery is impacted, thereby improving the safety of the battery.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic diagram of a battery cover according to some embodiments of the utility model;

[0020] Figure 2 yes Figure 1 A schematic diagram of the other direction of the battery cover;

[0021] Figure 3 yes Figure 1 Exploded view of the battery cover;

[0022] Figure 4 yes Figure 1 An exploded view of the battery cover from another direction;

[0023] Figure 5 yes Figure 1 A cross-sectional view of the middle battery cover;

[0024] Figure 6 yes Figure 5 The enlarged view of point A in the middle;

[0025] Figure 7 is a schematic diagram of a pole according to some embodiments of the utility model;

[0026] Figure 8 yes Figure 7 Cross-sectional view of the center pole.

[0027] Reference numerals:

[0028] 100. Battery cover;

[0029] 10. Cover plate body; 11. First mounting hole; 12. Fixing groove;

[0030] 20. bottom plate; 21. second mounting hole; 22. limiting protrusion;

[0031] 30, pole; 31, plate; 32, column; 33, main body; 331, flat plate; 332, boss; 333, first mating surface; 34, covering portion; 341, boss; 342, second mating surface; 343, limit groove; 344, covering portion body; 345, first covering portion; 346, second covering portion;

[0032] 41. Sealing ring; 42. First insulating member; 421. First mounting groove; 422. First through hole; 43. Second insulating member; 431. Second mounting groove; 432. Second through hole. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0034] In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0035] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] Reference below Figure 1-Figure 8 A battery cover 100 according to an embodiment of the present invention is described.

[0037] According to the battery cover 100 of the first embodiment of the utility model, the battery cover 100 includes a cover body 10, a bottom plate 20 and a pole 30, and the pole 30 is a negative pole 30. The bottom plate 20 is located on the side of the cover body 10 close to the pole group, and a first mounting hole 11 is formed on the cover body 10. The bottom plate 20 has a second mounting hole 21, and the second mounting hole 21 is connected to the first mounting hole 11. The pole 30 includes a plate body 31 and a column 32, and the column 32 is connected to the side of the plate body 31 close to the pole group. The column 32 is penetrated through the first mounting hole 11 and the second mounting hole 21 so that the column 32 can be connected to the pole group, and the plate body 31 is located on the side of the cover body 10 away from the pole group. For example, the column 32 can be other structures such as a cylinder, an elliptical cylinder or a prism. In the present application, preferably, the column 32 is a cuboid, and the edges of the cuboid are provided with chamfers.

[0038] The pole 30 is an integrally formed part, which can simplify the processing technology, increase the structural strength of the pole 30, and save the process of installing the column 32 on the plate 31. For example, the pole 30 can be processed by combining stamping and machining.

[0039] The pole 30 includes a main body 33 and a covering part 34, wherein the main body 33 is made of aluminum and the covering part 34 is made of copper. The covering part 34 is located on the side of the main body 33 facing the pole group, and the main body 33 includes a flat plate 331 and a protrusion 332, wherein the protrusion 332 is connected to the side of the flat plate 331 facing the covering part 34. The covering part 34 includes a first covering part 345 and a second covering part 346 connected to each other, wherein the first covering part 345 covers the side of the flat plate 331 away from the pole group, and the first covering part 345 and the flat plate 331 are configured as a plate body 31; the second covering part 346 covers the outer peripheral side of the protrusion 332, and the second covering part 346 and the protrusion 332 are configured as a column 32.

[0040] The second covering portion 346 includes a covering portion body 344 and a boss 341, the boss 341 is connected to a side of the covering portion body 344 close to the pole group, the boss 341 is passed through the second mounting hole 21 and is fixedly connected to the base plate 20, and the edge positions of the pole 30 and the base plate 20 that match are directly seam welded by laser, eliminating the riveting process of the related technology. Under the premise of ensuring the structural strength, the processing steps and costs of the battery cover 100 are reduced.

[0041] The covering portion 34 covers the outer peripheral side of the protruding column 332, extends toward the direction of the flat plate 331 and covers the side of the flat plate 331 close to the pole group. The plate body 31 of the pole 30 includes the flat plate 331 constructed of aluminum material and the covering portion 34 constructed of copper material. The column 32 of the pole 30 also includes the protruding column 332 constructed of aluminum material and the covering portion 34 constructed of copper material. The connection area between the covering portion 34 and the main body 33 is increased to improve the reliability of the connection between the covering portion 34 and the main body 33, so that the current-carrying capacity of the pole 30 is enhanced. Even in the case of excessive current, the pole 30 will not be melted at the connection between the main body 33 and the covering portion 34, thereby avoiding the battery from being out of control. In addition, the pole 30 is an integrally formed part, and the area where the covering portion 34 is connected to the main body portion 33 is large. The connection reliability between the covering portion 34 and the main body portion 33 is strong, which can prevent the pole 30 from peeling off at the connection between the main body portion 33 and the covering portion 34 when the battery is impacted, thereby increasing the safety of the battery.

[0042] The pole 30 is formed by integrally stamping a copper-aluminum composite plate, thereby avoiding the friction welding process of the pole 30 . The copper-aluminum composite plate is easy to process, has a high material utilization rate, a stable structure, and a low cost.

[0043] In a specific example, referring to Figure 1-Figure 6 A first insulating member 42 is provided between the cover body 10 and the pole 30. The cover body 10 has a fixing groove 12 on one side facing the plate body 31. The first insulating member 42 is located in the fixing groove 12. The first mounting hole 11 is located on the bottom wall of the fixing groove 12. The first insulating member 42 has a first mounting groove 421. The plate body 31 is located in the first mounting groove 421. The first insulating member 42 has a first through hole 422 that penetrates the bottom wall of the first mounting groove 421. The first through hole 422 is connected to the first mounting hole 11. The first insulating member 42 can be provided to prevent the pole 30 from contacting the cover body 10 and causing a battery short circuit.

[0044] A second insulating member 43 is provided between the bottom plate 20 and the cover plate body 10, and a second mounting groove 431 is provided on the side of the second insulating member 43 facing the electrode group, the bottom plate 20 is located in the second mounting groove 431, and the second insulating member 43 has a second through hole 432 that penetrates the bottom wall of the second mounting groove 431, and the second through hole 432 is connected to the second mounting hole 21, and the column 32 is sequentially penetrated through the first through hole 422, the first mounting hole 11, the second through hole 432 and the second mounting hole 21. The second insulating member 43 can be provided to prevent the bottom plate 20 from contacting the cover plate body 10 and causing a battery short circuit.

[0045] The first insulating member 42 and the second insulating member 43 may be made of rubber or plastic, wherein the resistance of the first insulating member 42 is greater than 200 MΩ.

[0046] According to the battery cover 100 of the embodiment of the utility model, the pole 30 is an integrally formed part, and the pole 30 includes a main body 33 and a covering part 34, the main body 33 is an aluminum material part, and the covering part 34 is a copper material part. The first covering part 345 covers the outer peripheral side of the convex column 332 to form a column 32, and the second covering part 346 covers the outer surface of the flat plate 331 to form a plate body 31, which can increase the connection area between the covering part 34 and the main body 33, so that the current capacity of the pole 30 is enhanced, and even in the case of excessive current, the pole 30 will not be melted, thereby avoiding the battery from being out of control; at the same time, it can avoid the pole 30 from peeling off at the connection between the main body 33 and the covering part 34 when the battery is impacted, thereby improving the safety of the battery; the boss 341 of the covering part 34 is fixedly connected to the bottom plate 20 by laser welding, and the processing procedures and costs of the battery cover 100 are reduced under the premise of ensuring the structural strength.

[0047] According to some embodiments of the present invention, referring to Figure 7-Figure 8 The main body 33 has a first mating surface 333, and the covering portion 34 has a second mating surface 342. The second mating surface 342 is mated with the first mating surface 333, and both the first mating surface 333 and the second mating surface 342 are stepped surfaces. There is a height difference between the mating point between the first mating surface 333 and the second mating surface 342 of the plate body 31 and the mating point between the first mating surface 333 and the second mating surface 342 of the column 32, which is used to increase the connection strength between the main body 33 and the covering portion 34.

[0048] According to some embodiments of the present invention, referring to Figure 1-Figure 8In the projection plane parallel to the battery cover 100, the projection plane of the first mounting hole 11 is located in the projection plane of the first mating surface 333 and the second mating surface 342. The mating edges of the first mating surface 333 and the second mating surface 342 are located outside the first mounting hole 11 to prevent the cover body 10 from generating tensile stress on the column 32, causing the mating surfaces of the main body 33 and the covering portion 34 to peel off.

[0049] According to some embodiments of the present invention, referring to Figure 1-Figure 8 The battery cover 100 further includes a sealing ring 41, which is disposed around the column 32, and at least a portion of the sealing ring 41 is located in the first mounting hole 11, and a portion of the sealing ring 41 may be located in the first mounting hole 11, or the entire sealing ring 41 may be located in the first mounting hole 11. The sealing ring 41 is used to isolate the column 32 from the cover body 10, to prevent the column 32 from contacting the cover body 10 and causing a battery short circuit. For example, the sealing ring 41 may be made of rubber or plastic.

[0050] The mating edges of the first mating surface 333 and the second mating surface 342 are located on the outside of the first mounting hole 11, that is, the mating edges of the first mating surface 333 and the second mating surface 342 are located on the outside of the sealing ring 41, so as to avoid the elastic force generated by the sealing ring 41 from exerting a pulling force on the mating point of the first mating surface 333 and the second mating surface 342, causing separation at the junction of the first mating surface 333 and the second mating surface 342.

[0051] According to some embodiments of the present invention, referring to Figure 1-Figure 8 In the projection plane parallel to the battery cover 100, the projection plane of the first covering portion 345 coincides with the projection plane of the flat plate 331, and the circumferential side surface of the first covering portion 345 is coplanar with the circumferential side surface of the flat plate 331. The first covering portion 345 can completely cover the side surface of the flat plate 331 of the main body 33 close to the cover body 10, so as to increase the connection area between the main body 33 and the covering portion 34.

[0052] According to some embodiments of the present invention, referring to Figure 1-Figure 8 In the projection plane parallel to the battery cover 100, the projection plane of the boss 341 is located in the projection plane of the covering body 344, a first limiting portion is defined between the covering body 344 and the boss 341, and a second limiting portion is provided on the inner wall of the second mounting hole 21, the second limiting portion cooperates with the first limiting portion to limit the installation position of the pole 30, which can improve the accuracy of the installation position of the pole 30.

[0053] According to some embodiments of the present invention, referring to Figure 1-Figure 8In the projection plane perpendicular to the battery cover 100, the projection plane of the boss 341 is located in the projection plane of the bottom plate 20, that is, the boss 341 does not extend out of the second mounting hole 21, and the boss 341 is retracted in the second mounting hole 21 to avoid interference between the boss 341 and other structures in the battery housing.

[0054] According to some embodiments of the present invention, referring to Figure 1-Figure 8 The first limiting portion is a limiting groove 343 arranged on the outer peripheral side of the second covering portion 344, and the second limiting portion is a limiting protrusion 22 arranged on the inner peripheral wall of the base plate 20 and extending toward the inside of the second mounting hole 21, which can make the structure of the limiting groove 343 and the limiting protrusion 22 simple. The limiting protrusion 22 is located in the limiting groove 343, and the boss 341 of the pole 30 is fixedly connected to the limiting protrusion 22 by laser welding.

[0055] According to some embodiments of the present invention, referring to Figure 1-Figure 8 A pole ear is connected to one end of the pole group, and the pole ear is fixedly connected to the bottom plate 20. The pole ear and the pole column 30 can be indirectly connected through the bottom plate 20. The area of ​​the bottom plate 20 is larger than that of the pole column 30, which can facilitate the connection of the pole ear. For example, the pole column 30 is a negative pole column 30, and the pole ear is a negative pole ear.

[0056] The battery according to the embodiment of the second aspect of the utility model includes: the battery cover 100 according to the embodiment of the first aspect of the utility model.

[0057] According to the battery of the embodiment of the utility model, by providing the above-mentioned battery cover 100, the connection area between the covering portion 34 and the main body portion 33 can be increased, so that the current carrying capacity of the pole 30 is enhanced, and even in the case of excessive current, the pole 30 will not melt, thereby avoiding the battery from being out of control; at the same time, it can avoid the pole 30 from peeling off at the connection between the main body portion 33 and the covering portion 34 when the battery is impacted, thereby improving the safety of the battery.

[0058] In the description of this specification, the description with reference to the terms "some embodiments", "optionally", "further" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0059] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery cover, characterized in that: include: A cover body, wherein a first mounting hole is formed on the cover body, A bottom plate, the bottom plate is located on a side of the cover plate body close to the pole group, and the bottom plate has a second mounting hole connected to the first mounting hole; The pole is an integrally formed part, the pole comprises a plate body and a column, the column body is connected to a side of the plate body close to the pole group, the column body is penetrated through the first mounting hole and the second mounting hole, the pole comprises a main body and a covering portion, the covering portion is located on a side of the main body facing the pole group, the main body comprises a flat plate and a convex column, the convex column is connected to a side of the flat plate facing the covering portion, the covering portion comprises a connected first covering portion and a second covering portion, the first covering portion covers the side of the flat plate close to the pole group, and is configured as the plate body with the flat plate, the second covering portion covers the outer peripheral side of the convex column, and is configured as the column with the convex column, the second covering portion comprises a covering portion body and a boss connected to a side of the covering portion body close to the pole group, the boss is penetrated through the second mounting hole and is fixedly connected to the bottom plate; Wherein, the main body is made of aluminum material, and the covering part is made of copper material.

2. The battery cover according to claim 1, characterized in that: The main body has a first mating surface, the covering portion has a second mating surface mating with the first mating surface, and both the first mating surface and the second mating surface are step surfaces.

3. The battery cover according to claim 2, characterized in that: In a projection plane parallel to the battery cover, the projection plane of the first mounting hole is located within the projection planes of the first mating surface and the second mating surface.

4. The battery cover according to claim 3, characterized in that: It also includes a sealing ring, which is arranged around the column, and at least a part of the sealing ring is located in the first mounting hole.

5. The battery cover according to claim 1, characterized in that: In a projection plane parallel to the battery cover, the projection plane of the first covering portion coincides with the projection plane of the flat plate.

6. The battery cover according to claim 1, characterized in that: In a projection plane parallel to the battery cover, the projection plane of the boss is located within the projection plane of the covering body, so as to define a first limiting portion between the covering body and the boss, and a second limiting portion cooperating with the first limiting portion is provided on the inner wall of the second mounting hole, so as to limit the installation position of the pole.

7. The battery cover according to claim 6, characterized in that: In a projection plane perpendicular to the battery cover, the projection plane of the boss is located in the projection plane of the bottom plate.

8. The battery cover according to claim 6, characterized in that: The first limiting portion is a limiting groove provided on the outer peripheral side of the second covering portion, and / or the second limiting portion is a limiting protrusion provided on the inner peripheral wall of the bottom plate and extending toward the inside of the second mounting hole.

9. The battery cover according to claim 1, characterized in that: A pole lug is connected to one end of the pole group, and the pole lug is fixedly connected to the bottom plate.

10. A battery, characterized in that: include: The battery cover according to any one of claims 1 to 9.

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