Composite pole, battery cover plate assembly and battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a composite pole, a battery cover plate assembly and a battery, the composite pole comprises a pole body, a transition ring and a pole body, the pole body is arranged on a battery cover plate, and the pole body comprises a combination part and a clamping part; the transition ring is arranged on the periphery of the combination part in a sleeving manner, the periphery of the combination part is welded with the inner wall of the transition ring, the transition ring and the pole body are made of different materials, the transition ring and the combination part can be integrally pressed and riveted to deform, and the pressing and riveting direction of the transition ring and the combination part is parallel to the axial direction of the pole body. The transition ring is sleeved on the pole body, a friction welding connection mode can be replaced, the connection surface of the pole body and the transition ring is parallel to the first direction, so that the pole body is made of a composite material, the strength of the connection surface under riveting pressure is improved, the pole body and the transition ring are not easy to separate, and the reliability of the pole body is improved. And meanwhile, normal use of the battery can be ensured.

Description

Technical Field

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

[0002] A battery is a device that can convert chemical energy into electrical energy. Using a battery as an energy source can provide stable voltage and current, and the battery has a simple structure and is easy to carry. It is a commonly used energy storage device in modern social life.

[0003] In the related technology, the battery includes a battery shell, a battery cell, and a pole. The battery cell is arranged inside the battery shell. The top surface of the battery shell is connected to a battery cover. The pole is divided into a positive pole and a negative pole. The positive pole and the negative pole are respectively passed through the battery cover. One end of the pole is connected to the circuit outside the battery, and the other end is connected to the battery cell inside the battery, so that the battery can realize the function of charging and discharging.

[0004] The external circuit is connected to the single cell through an aluminum strip, and the negative current collector of the battery cell is made of copper. Therefore, in order to ensure the normal use of the battery and reduce cost and weight, the negative pole is usually made of a copper-aluminum composite material. The end of the negative pole facing the outside of the battery is an aluminum column, and the end facing the inside of the battery is a copper column. The aluminum column and the copper column are connected by friction welding. During the friction welding process, the thermal conductivity of copper and aluminum is quite different, which may cause uneven heat distribution in the welding area, thereby affecting the stability of the resistance. In addition, the composite pole needs to be riveted to the battery cover. Due to the low strength of the connection surface, the pole may break from the connection surface under the action of the continuous force applied to the connection surface during the riveting process, resulting in battery failure. Utility Model Content

[0005] The utility model aims to provide a composite pole, a battery cover assembly and a battery, so as to solve the problem that the composite pole has poor resistance stability and is easy to break during the riveting process.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] In a first aspect, a composite pole comprises a pole body and a transition ring, wherein the pole body is arranged on a battery cover, the pole body comprises a coupling portion and a clamping portion, and the clamping portion can be clamped with the battery cover; the transition ring is sleeved on the outer periphery of the coupling portion, the outer periphery of the coupling portion is welded to the inner wall of the transition ring, and the material of the transition ring and the pole body is different, the transition ring and the coupling portion can be integrally riveted and deformed, and the riveting direction of the transition ring and the coupling portion is parallel to the axial direction of the pole body.

[0008] Preferably, the pole body is made of copper material; and / or the transition ring is made of aluminum material.

[0009] Preferably, a material reduction groove is provided on the top end surface of the joint portion.

[0010] Preferably, the pole body further includes a limiting portion, the combining portion, the clamping portion and the limiting portion are sequentially arranged along the axial direction of the pole body, and the combining portion and the limiting portion are respectively arranged on both sides of the battery cover.

[0011] Preferably, the outer diameter of the combining portion, the outer diameter of the clamping portion, and the outer diameter of the limiting portion increase sequentially along the riveting direction.

[0012] In the second aspect, a battery cover assembly includes a battery cover, a rivet block and a composite pole, the battery cover is provided with a snap-in hole, the snap-in portion is snap-connected to the battery cover through the snap-in hole, the rivet block is arranged on the side of the battery cover away from the interior of the battery, the rivet block is provided with a rivet hole, the rivet block can be riveted to the transition ring, the composite pole also includes a limiting portion, the rivet block and the limiting portion are respectively located on both sides of the battery cover.

[0013] Preferably, the battery cover assembly further comprises an insulating assembly, wherein the insulating assembly comprises an upper insulating member and a lower insulating member, and the upper insulating member and the lower insulating member are respectively arranged on both sides of the battery cover.

[0014] Preferably, the rivet hole is stepped, and the diameter of the rivet hole at one end away from the battery cover plate is larger than the diameter of the rivet hole at one end toward the battery cover plate.

[0015] Preferably, the battery cover assembly further comprises a sealing ring, and the sealing ring is arranged between the clamping portion and the battery cover.

[0016] In a third aspect, a battery comprises a battery cell, a battery shell and a battery cover assembly, wherein the battery cell is arranged inside the battery shell, the battery cover assembly is arranged on the outer wall of the battery shell, and the composite pole is respectively connected to the battery cell and the battery cover.

[0017] Beneficial effects of the utility model:

[0018] The utility model provides a composite pole, a battery cover assembly and a battery, wherein the composite pole comprises a pole body and a transition ring, wherein the pole body is arranged on the battery cover, the pole body comprises a coupling portion and a clamping portion, and the clamping portion can be clamped with the battery cover; the transition ring is sleeved on the outer periphery of the coupling portion, the outer periphery of the coupling portion is welded to the inner wall of the transition ring, and the material of the transition ring and the pole body is different, the transition ring and the coupling portion can be integrally riveted and deformed, and the riveting direction of the transition ring and the coupling portion is parallel to the axial direction of the pole body.

[0019] The connection surface between the pole body and the transition ring is parallel to the riveting direction, which can improve the structural strength of the connection surface during the riveting process, make the pole body and the transition ring more tightly connected, avoid the pole body and the connection ring from being separated, the composite pole from being broken, etc., improve the stability of the composite pole, and ensure the normal use of the battery while stably connecting the composite pole to the battery cover. The battery cover is provided with a snap-in hole, so that the composite pole passes through the battery cover and the riveting block respectively, so that the limiting part and the joint part are respectively located on both sides of the battery cover, and the joint part is riveted so that one end of the composite pole is riveted to the riveting block and the other end is snapped to the battery cover, limiting the position of the composite pole on the battery cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a composite pole in one embodiment of the utility model;

[0021] Figure 2 It is a partial cross-sectional view of a battery cover in one embodiment of the utility model;

[0022] Figure 3 It is a partial cross-sectional view of an embodiment of the utility model intended to show the state of a composite pole after riveting.

[0023] In the figure:

[0024] 1. Pole body; 11. Joint; 111. Material reduction groove; 12. Clamping part; 13. Limiting part; 2. Transition ring; 3. Battery cover; 31. Clamping hole; 4. Riveting block; 41. Riveting hole; 5. Sealing ring; 6. Insulating assembly; 61. Upper insulating member; 62. Lower insulating member. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0026] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 invention can be understood according to specific circumstances.

[0027] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0028] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, 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 of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0029] See also Figure 1-Figure 3 The utility model provides a composite pole, including a pole body and a transition ring 2, the pole body is arranged on a battery cover plate 3, the pole body includes a connecting portion 11 and a clamping portion 12, the clamping portion 12 can be clamped with the battery cover plate 3; the transition ring 2 is sleeved on the outer periphery of the connecting portion 11, the outer periphery of the connecting portion 11 is welded to the inner wall of the transition ring 2, and the transition ring 2 and the pole body are made of different materials, the transition ring 2 and the connecting portion 11 can be integrally riveted and deformed, and the riveting direction of the transition ring 2 and the connecting portion 11 is parallel to the axial direction of the pole body.

[0030] In this embodiment, the transition ring 2 is welded on the joint 11, the length of the transition ring 2 is equal to the length of the joint 11, the inner diameter of the transition ring 2 is equal to the outer diameter of the joint 11, and the outer diameter of the transition ring 2 is smaller than the outer diameter of the clamping portion 12, so that after the transition ring 2 is sleeved on the joint 11, the transition ring 2 and the clamping portion 12 form a stepped structure, and the transition ring 2 and the joint 11 are both located on the side of the battery cover 3 facing the outside.

[0031] In this way, the clamping part 12 is clamped onto the battery cover 3, and the welded joint 11 and the transition ring 2 are riveted together to achieve the fixation of the pole body on the battery cover 3. Since the riveting direction of the joint 11 and the transition ring 2 is parallel to the axial direction of the pole body, during the riveting process, the joint 11 and the transition ring 2 are squeezed and deformed against each other in a direction perpendicular to the riveting direction, and are not prone to detachment or breakage, thereby enhancing the structural strength of the pole body during the riveting process, avoiding battery failure due to pole breakage during the riveting process, and improving the quality of the battery.

[0032] It should be understood that the connection method between the transition ring 2 and the joint 11 can be adjusted according to actual needs and is not limited to welding, and will not be listed in detail here.

[0033] In some embodiments, see Figure 1 The pole body is made of copper material; the transition ring 2 is made of aluminum material.

[0034] It can be understood that the pole body made of copper material is connected to the battery cell, and the external circuit is connected to the transition ring 2 made of aluminum material, so that the battery can maintain good conductivity. Since aluminum has a high thermal conductivity, the transition ring 2 is mounted on the pole, which can more evenly disperse the heat in the welding area, help reduce the temperature gradient in the welding area, and achieve the effect of reducing resistance and making the resistance of the composite pole more stable.

[0035] In some embodiments, see Figure 1 , a material reduction groove 111 is provided on the top surface of the joint 11. The cross section of the material reduction groove 111 is circular, and the length of the material reduction groove 111 is parallel to the riveting direction. It can be understood that the material reduction groove 111 is provided on the joint 11, so that it can fully contact with the riveting head during the riveting process, and reduces the pressure requirement during riveting, which not only improves the riveting quality, but also saves materials and reduces costs.

[0036] It should be noted that the depth and cross-sectional area of ​​the material reduction groove 111 can be adjusted according to actual needs, and will not be listed in detail here.

[0037] In some embodiments, see Figure 2 The pole body further includes a limiting portion 13, the coupling portion 11, the clamping portion 12 and the limiting portion 13 are sequentially arranged along the axial direction of the pole body, and the coupling portion 11 and the limiting portion 13 are respectively arranged on both sides of the battery cover 3. In some embodiments, the outer diameters of the coupling portion 11, the clamping portion 12 and the limiting portion 13 increase sequentially along the riveting direction.

[0038] Optionally, the combining portion 11, the clamping portion 12, and the limiting portion 13 are all cylindrical structures, and the two ends of the clamping portion 12 are fixedly connected to the combining portion 11 and the limiting portion 13 respectively, and the combining portion 11, the clamping portion 12, and the limiting portion 13 are coaxially arranged, so that the longitudinal section of the pole body is stepped, and the battery cover plate 3 is provided with a hole (not shown in the figure) for the clamping portion 12 to pass through, and the hole diameter is smaller than the outer diameter of the clamping portion 12.

[0039] It can be understood that the pole body is passed through the battery cover 3, and the limiting portion 13 and the connecting portion 11 are respectively located on both sides of the battery cover 3. The limiting portion 13 abuts against the battery cover 3, which can limit the relative position of one end of the pole body and the battery cover 3. Then the connecting portion 11 is riveted to deform the connecting portion 11 and the transition ring 2, thereby limiting the relative position of the other end of the pole body and the battery cover 3, thereby achieving the effect of fixing the pole body on the battery cover 3.

[0040] The utility model also provides a battery cover assembly, see Figure 2-Figure 3 , including a battery cover plate 3, a rivet block 4 and a composite pole, the battery cover plate 3 is provided with a snap-in hole 31, the snap-in portion 12 is snap-in with the battery cover plate 3 through the snap-in hole 31, the rivet block 4 is arranged on the side of the battery cover plate 3 away from the inside of the battery, the rivet block 4 is provided with a rivet hole 41, the rivet block 4 can be riveted with the transition ring 2, the composite pole further includes a limit portion 13, the rivet block 4 and the limit portion 13 are respectively located on both sides of the battery cover plate 3. In some embodiments, the rivet hole 41 is stepped, and the aperture of the rivet hole 41 at the end away from the battery cover plate 3 is larger than the aperture of the rivet hole 41 at the end facing the battery cover plate 3.

[0041] Among them, the inner diameter of the snap-in hole 31 is adapted to the outer diameter of the snap-in part 12, so that the snap-in part 12 is slidably connected to the battery cover 3, and the rivet block 4 made of aluminum material is located on the side of the battery cover 3 away from the inside of the battery. The length of the rivet hole 41 is less than the length of the transition ring 2, and the aperture of the rivet hole 41 toward one end of the battery cover 3 is equal to the outer diameter of the transition ring 2, so that the rivet block 4 is slidably connected to the transition ring 2.

[0042] It can be understood that when the transition ring 2 and the joint 11 are riveted to produce deformation, the stepped riveting hole 41 can limit the deformation shape of the transition ring 2 and the joint 11, and make the rivet block 4 and the limiting portion 13 respectively abut against the two sides of the battery cover 3, so that the pole body and the rivet block 4 are stably fixed on the battery cover 3, thereby improving the stability of the battery during use and preventing the pole body from falling off the battery cover 3.

[0043] In some embodiments, see Figure 2-Figure 3The battery cover assembly also includes an insulating assembly 6, which includes an upper insulating member 61 and a lower insulating member 62, which are respectively arranged on both sides of the battery cover 3. In this embodiment, the upper insulating member 61 and the lower insulating member 62 are both made of plastic material, the upper insulating member 61 is located on the side of the battery cover 3 facing the outside, the lower insulating member 62 is located on the side of the battery cover 3 facing the inside of the battery, and the upper insulating member 61 is located between the riveting block 4 and the battery cover 3, and the lower insulating member 62 is clamped with the limiting portion 13.

[0044] It can be understood that when the pole body is riveted to the battery cover 3, the upper insulating member 61 located between the riveting block 4 and the battery cover 3 is tightly abutted against the battery cover 3 and the riveting block 4 on both sides, and the upper insulating member 61 and the lower insulating member 62 are respectively provided, which can not only play a certain protective role on the pole body, but also reduce the occurrence of short circuits and extend the battery life.

[0045] It should be noted that the materials of the upper insulating member 61 and the lower insulating member 62 can be adjusted according to actual needs as long as they can provide an insulating effect, and they are not listed in detail here.

[0046] In some embodiments, see Figure 2 The battery cover assembly further includes a sealing ring 5, which is disposed between the clamping portion 12 and the battery cover 3. In this embodiment, the sealing ring 5 is made of an elastic insulating material (such as rubber, silicone, etc.), and the longitudinal section of the sealing ring 5 is stepped, and the sealing ring 5 is respectively in contact with the clamping portion 12, the limiting portion 13, and the battery cover 3.

[0047] It is understandable that the sealing ring 5 is provided between the limiting portion 13 and the battery cover 3, which can effectively fill the gap between the pole body and the battery cover 3, prevent liquid or gas in the external environment from entering the battery, and prevent the electrolyte inside the battery from leaking to the outside.

[0048] It should be noted that the material and location of the sealing ring 5 can be adjusted according to actual needs.

[0049] See also Figure 2 The utility model also provides a battery (not shown in the figure), including a battery cell (not shown in the figure), a battery shell (not shown in the figure) and a battery cover assembly, the battery cell is arranged inside the battery shell, the battery cover assembly is arranged on the outer wall of the battery shell, and the composite pole is respectively connected to the battery cell and the battery cover 3.

[0050] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A composite pole, characterized in that: include: A pole body, the pole body being arranged on the battery cover plate (3), the pole body comprising a coupling portion (11) and a clamping portion (12), the clamping portion (12) being capable of being clamped with the battery cover plate (3); A transition ring (2), wherein the transition ring (2) is sleeved on the outer periphery of the connecting portion (11), the outer periphery of the connecting portion (11) is welded to the inner wall of the transition ring (2), and the transition ring (2) and the pole body are made of different materials, the transition ring (2) and the connecting portion (11) can be integrally deformed by riveting, and the riveting direction of the transition ring (2) and the connecting portion (11) is parallel to the axial direction of the pole body.

2. The composite pole according to claim 1, characterized in that: The pole body is made of copper material; and / or the transition ring (2) is made of aluminum material.

3. The composite pole according to claim 1, characterized in that: A material reduction groove (111) is provided on the top end surface of the coupling portion (11).

4. The composite pole according to claim 1, characterized in that: The pole body further comprises a limiting portion (13), the combining portion (11), the clamping portion (12) and the limiting portion (13) are arranged in sequence along the axial direction of the pole body, and the combining portion (11) and the limiting portion (13) are respectively arranged on both sides of the battery cover plate (3).

5. The composite pole according to claim 4, characterized in that: The outer diameter of the combining portion (11), the outer diameter of the clamping portion (12), and the outer diameter of the limiting portion (13) increase sequentially along the riveting direction.

6. A battery cover assembly, characterized in that: The composite pole comprises a battery cover (3), a rivet block (4) and the composite pole according to any one of claims 1 to 5, wherein the battery cover (3) is provided with a snap-in hole (31), the snap-in portion (12) is snap-connected with the battery cover (3) through the snap-in hole (31), the rivet block (4) is arranged on a side of the battery cover (3) away from the interior of the battery, the rivet block (4) is provided with a rivet hole (41), the rivet block (4) can be riveted with the transition ring (2), and the composite pole further comprises a limiting portion (13), the rivet block (4) and the limiting portion (13) are respectively located on both sides of the battery cover (3).

7. The battery cover assembly according to claim 6, characterized in that: The battery cover plate assembly further comprises an insulating assembly (6), wherein the insulating assembly (6) comprises an upper insulating member (61) and a lower insulating member (62), wherein the upper insulating member (61) and the lower insulating member (62) are respectively arranged on both sides of the battery cover plate (3).

8. The battery cover assembly according to claim 6, characterized in that: The rivet hole (41) is in a stepped shape, and the hole diameter of the end of the rivet hole (41) facing away from the battery cover plate (3) is larger than the hole diameter of the end of the rivet hole (41) facing the battery cover plate (3).

9. The battery cover assembly according to claim 6, characterized in that: The battery cover plate assembly further comprises a sealing ring (5), wherein the sealing ring (5) is arranged between the clamping portion (12) and the battery cover plate (3).

10. A battery, characterized in that: It comprises a battery cell, a battery shell and a battery cover assembly as described in any one of claims 6 to 9, wherein the battery cell is arranged inside the battery shell, the battery cover assembly is arranged on the outer wall of the battery shell, and the composite pole is connected to the battery cell and the battery cover (3) respectively.

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