Connecting piece, battery pack, electric device and energy storage device

Abstract

The present disclosure relates to a connecting sheet, a battery pack, an electrical device and an energy storage device, the connecting sheet comprising a first connecting body, a second connecting body and a supporting body, the first connecting body and the second connecting body being arranged at an angle and respectively formed with a first connecting portion and a second connecting portion, and the supporting body being used to support the second connecting body to the first connecting body. Through the above technical solution, the connecting sheet can solve the problem of tensile stress caused by assembly tolerance on the welding of the connecting sheet.

Description

Technical Field

[0001] This disclosure relates to the field of battery technology, and more specifically, to a connector, a battery pack, an electrical device, and an energy storage device. Background Technology

[0002] In a battery pack, two battery cells are electrically connected by welding two connecting tabs. However, due to manufacturing tolerances, assembly tolerances after assembly can cause tensile stress at the weld joints of the connecting tabs, which is detrimental to the reliability of the connection between the connecting tabs. Utility Model Content

[0003] The purpose of this disclosure is to provide a connector, battery pack, electrical device, and energy storage device that can solve the problem of tensile stress at the weld joint of the connector caused by assembly tolerances.

[0004] To achieve the above objectives, according to a first aspect of this disclosure, a connecting piece is provided, the connecting piece including a first connecting body, a second connecting body, and a support body, wherein the first connecting body and the second connecting body are arranged at an angle and respectively form a first connecting portion and a second connecting portion, and the support body is used to support the second connecting body on the first connecting body.

[0005] Optionally, one of the first connector or the second connector is connected to the support, and the other has an abutment portion. The support extends from the first connector or the second connector toward the abutment portion and abuts against the abutment portion.

[0006] Optionally, the first connector or the second connector includes a connector body and the abutment portion. The abutment portion is constructed as a protrusion, which protrudes from opposite sides of the connector body away from the connector body. The end of the support body forms an abutment surface to abut against the protrusion.

[0007] Optionally, the abutment portion is constructed as an arched portion, with a portion of the first connector arching toward the side where the second connector is located to form the arched portion, the support being connected to the end of the second connector and the end of the support forming an abutment surface, the abutment surface abutting against the arched portion.

[0008] Optionally, the first connector has an abutment portion, which is configured as a plug-in portion. The second connector is connected to the support body, and the end of the support body has a plug-in block. The support body extends from the second connector toward the abutment portion so that the plug-in block is plugged into the plug-in portion.

[0009] Optionally, the first connector, the second connector, and the support are integrally formed.

[0010] Optionally, a first transition portion is provided between the first connector and the second connector. The first transition portion is configured such that after the second connector is bent to be arranged at an angle to the first connector, the first transition portion is formed into an arc shape. And / or, a second transition portion is provided between the support body and the first connector or the second connector. The second transition portion is configured such that after the support body is bent to be arranged at an angle to the first connector or the second connector, the second transition portion is formed into an arc shape.

[0011] According to a second aspect of this disclosure, a battery pack is provided, including a battery pack and the aforementioned connecting piece, wherein the first connecting portion is electrically connected to the battery pack.

[0012] Optionally, the battery pack further includes a support beam, the support beam having a clearance portion for avoiding the second connecting body, the second connecting body being supported on the support beam via the support body, and a gap between the support body and the support beam.

[0013] Optionally, the connecting piece is provided with an insulating structure on the side facing the support beam, and / or the support beam is provided with the insulating element at the clearance portion.

[0014] According to a third aspect of this disclosure, an electrical device is provided, including the aforementioned connecting piece or the aforementioned battery pack.

[0015] According to a fourth aspect of this disclosure, an energy storage device is provided, including the aforementioned connecting piece or the aforementioned battery pack.

[0016] Through the above technical solution, in the connecting piece provided in this disclosure, the first connecting part is used to make a conductive connection with the terminal of the battery pack, and the second connecting part is used to make a conductive connection with the component to be connected. When the connecting piece is used to realize the conductive connection between two battery packs, the component to be connected can be a connecting strip that makes a conductive connection with another battery pack. When the connecting piece is used to realize the conductive connection between the battery pack and an external electrical device, the component to be connected can be an electrical connector of the external electrical device. The support body is used to support the second connecting body on the first connecting body. In this way, the structural strength of the second connecting body can be guaranteed, thereby ensuring the structural strength of the connecting piece. In addition, since the support body is part of the connecting piece, there is no need to support the connecting piece with other separately provided support components. This avoids tensile stress at the connection of the connecting piece due to assembly tolerances between the support components and the connecting piece, which helps to ensure the connection reliability between the connecting piece and the terminal of the battery pack or the component to be connected. This solves the problem of tensile stress at the weld of the connecting piece due to assembly tolerances.

[0017] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a partial perspective view of the battery pack provided in an exemplary embodiment of this disclosure;

[0020] Figure 2 This is a partial exploded view of the battery pack provided in an exemplary embodiment of this disclosure;

[0021] Figure 3 This is a partial cross-sectional view of a battery pack provided in an exemplary embodiment of this disclosure;

[0022] Figure 4 A perspective view of a first embodiment of the connecting piece provided in the exemplary embodiments of this disclosure, showing the unfolded state and the used state of the connecting piece;

[0023] Figure 5 A perspective view of a second embodiment of the connecting piece provided in the exemplary embodiments of this disclosure, showing the unfolded state and the used state of the connecting piece;

[0024] Figure 6 A perspective view of a third embodiment of the connecting piece provided in the exemplary embodiments of this disclosure, showing the unfolded state and the used state of the connecting piece;

[0025] Figure 7 A perspective view of a fourth embodiment of the connecting piece provided in the exemplary embodiments of this disclosure, showing the connecting piece in an unfolded state and a used state.

[0026] Explanation of reference numerals in the attached figures

[0027] 10. Connecting piece; 1. First connecting body; 11. First connecting part; 2. Second connecting body; 21. Second connecting part; 3. Support body; 31. Abutting surface; 32. Insertion block; 4. Abutting part; 41. Protrusion; 42. Arched part; 43. Insertion part; 51. First transition part; 52. Second transition part; 6. Connecting body body; 20. Battery pack; 30. Support beam; 301. Clearance part; 40. Insulating component; 50. Component to be connected. Detailed Implementation

[0028] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0029] In this disclosure, unless otherwise stated, the terms "first," "second," etc., used herein are for distinguishing one element from another and do not have sequential or material significance. Furthermore, in the following description, when referring to the accompanying drawings, unless otherwise explained, the same reference numerals in different drawings denote the same or similar elements. The above definitions are for explanation and illustration only and should not be construed as limiting this disclosure.

[0030] According to a first aspect of this disclosure, a connecting piece is provided, with reference to... Figure 3-7 As shown, the connecting piece 10 includes a first connecting body 1, a second connecting body 2, and a support body 3. The first connecting body 1 and the second connecting body 2 are arranged at an angle and respectively form a first connecting portion 11 and a second connecting portion 21. The support body 3 is used to support the second connecting body 2 on the first connecting body 1.

[0031] Through the above technical solution, in the connecting piece provided in this disclosure, the first connecting part 11 is used for conductive connection with the terminal post of the battery pack 20, and the second connecting part 21 is used for conductive connection with the component to be connected 50. When the connecting piece 10 is used to realize the conductive connection between two battery packs 20, the component to be connected 50 can be a connecting strip that is conductively connected to another battery pack 20. When the connecting piece 10 is used to realize the conductive connection between the battery pack and external electrical equipment, the component to be connected 50 can be an electrical connector of the external electrical equipment. The support body 3 is used to support the second connecting body 2. The first connector 1 ensures the structural strength of the second connector 2, thus guaranteeing the structural strength of the connecting piece 10. Furthermore, the support 3 is part of the connecting piece 10, eliminating the need for other separately provided support components to support the connecting piece 10. This avoids tensile stress at the connection point of the connecting piece 10 due to assembly tolerances between the support components and the connecting piece 10, thereby ensuring the reliability of the connection between the connecting piece 10 and the terminal post or the component to be connected 50 of the battery pack 20. This solves the problem of tensile stress at the weld point of the connecting piece 10 due to assembly tolerances.

[0032] It should be noted that "assembly tolerance" can be caused by dimensional errors during the machining of support components and / or connecting pieces 10, and / or by assembly errors during the assembly of support components and connecting pieces 10. Furthermore, the provision of the support body 3 helps to increase the welding equipment pressure that the connecting piece 10 can withstand, thereby preventing deformation of the connecting piece 10 during welding and ensuring the structural strength of the connecting piece 10.

[0033] In the connecting piece provided in this disclosure, as an exemplary embodiment, reference is made to... Figure 3-7As shown, one of the first connecting body 1 or the second connecting body 2 can be connected to the support body 3, and the other can have an abutment portion 4. The support body 3 can extend from the first connecting body 1 or the second connecting body 2 toward the abutment portion 4 and abut against the abutment portion 4. In this way, the support body 3 connected to the first connecting body 1 or the second connecting body 2 can be stably supported by the second connecting body 2 or the first connecting body 1 through the abutment portion 4. That is, the provision of the abutment portion 4 helps to improve the abutment reliability of the support body 3, thereby ensuring the support effect of the support body 3 on the second connecting body 2.

[0034] In the connecting piece provided in this disclosure, as an exemplary embodiment, reference is made to... Figure 4-5 As shown, the first connector 1 or the second connector 2 may include a connector body 6 and an abutment portion 4. The abutment portion 4 may be constructed as a protrusion 41, which protrudes from opposite sides of the connector body 6 away from the connector body 6. The end of the support body 3 may form an abutment surface 31 to abut against the protrusion 41. In this way, the protrusions 41 can be symmetrically arranged on opposite sides of the first connector 1 or the second connector 2. When the abutment surface 31 of the support body 3 abuts against the protrusion 41, it can support the opposite sides of the second connector 2, thereby ensuring the stability and structural strength of the second connector 2.

[0035] It should be noted that the first connector 1 has a connecting side connected to the second connector 2, and similarly, the second connector 2 has a connecting side connected to the first connector 1. Therefore, the "two opposite sides of the connector body 6" can be the two sides adjacent to the aforementioned connecting sides. Thus, this embodiment can include the following two implementation methods: 1. Reference Figure 4 As shown, the first connector 1 has protrusions 41 on both sides of its main body 6. The second connector 2 connects to two supports 3, which are arranged opposite to each other. Thus, the supports 3 and protrusions 41 are arranged in a one-to-one correspondence, and the supports 3 can abut against the corresponding protrusions 41 after the second connector 2 is bent relative to the first connector 1. II. Reference Figure 5 As shown, the connecting body 6 of the second connecting body 2 is provided with protrusions 41 on both sides of the connecting body 6. The first connecting body 1 is connected to two support bodies 3, which are arranged opposite to each other. In this way, the support bodies 3 and the protrusions 41 are arranged in a one-to-one correspondence. The support body 3 can abut against the corresponding protrusion 41 after the second connecting body 2 is bent relative to the first connecting body 1.

[0036] In the connecting piece provided in this disclosure, as an exemplary embodiment, reference is made to... Figure 6As shown, the abutment portion 4 can be constructed as an arched portion 42. A portion of the first connecting body 1 can arch towards the side where the second connecting portion 21 is located to form the arched portion 42. The support body 3 can be connected to the end of the second connecting body 2, and the end of the support body 3 forms an abutment surface 31, which abuts against the arched portion 42. In this embodiment, the abutment surface 31 can be designed as a curved surface adapted to the arched portion 42, or it can be designed as a plane, as long as the abutment surface 31 and the arched portion 42 are in surface contact or line contact. This disclosure does not impose specific limitations on this. The support body 3 can be bent from the end of the second connecting body 2 towards the arched portion 42 so that the abutment surface 31 abuts against the arched portion 42. In this embodiment, the connection between the second connecting body 2 and the support body 3 can be achieved without the need for other connecting components. Similarly, the connection between the first connecting body 1 and the arched portion 42 can be achieved without the need for other connecting components, thereby saving the cost of manufacturing and assembling the connecting piece 10. In addition, the arched portion 42 can be formed on the first connecting body 1 by processes such as stamping, which can ensure the integrity and structural strength of the first connecting body 1 and the arched portion 42.

[0037] In the connecting piece provided in this disclosure, as an exemplary embodiment, reference is made to... Figure 7 As shown, the first connecting body 1 can have an abutment portion 4, which can be configured as a plug-in portion 43. The second connecting body 2 can be connected to the support body 3. The end of the support body 3 can have a plug-in block 32. The support body 3 can extend from the second connecting body 2 toward the abutment portion 4, so that the plug-in block 32 is plugged into the plug-in portion 43. The support body 3 can be bent from the end of the second connecting body 2 toward the plug-in portion 43, so that the plug-in block 32 is plugged into the plug-in portion 43. This provides reliable support for the second connecting body 2 and prevents deformation of the second connecting body 2 during welding and assembly. In this embodiment, the connection between the second connecting body 2 and the support body 3 can be achieved without the need for other connecting components. Similarly, the connection between the first connecting body 1 and the plug-in portion 43 can be achieved without the need for other connecting components, thereby saving the cost of manufacturing and assembling the connecting piece 10. Furthermore, the plug-in portion 43 can be formed on the first connecting body 1 through processes such as stamping, thus ensuring the integrity of the first connecting body 1 and the plug-in portion 43. In addition, the insertion part 43 may be configured as an insertion groove or insertion hole, etc., and this disclosure does not impose specific limitations on it.

[0038] In the connecting piece provided in this disclosure, as an exemplary embodiment, reference is made to... Figure 3-7 As shown, the first connector 1, the second connector 2, and the support 3 are integrally formed. This facilitates the manufacturing of the connecting piece 10, and since the first connector 1, the second connector 2, and the support 3 do not require additional connecting parts between them, it saves materials and simplifies the process, thereby reducing costs.

[0039] In the connecting piece provided in this disclosure, as an exemplary embodiment, reference is made to... Figure 3-7 As shown, a first transition portion 51 is provided between the first connecting body 1 and the second connecting body 2. The first transition portion 51 is constructed such that after the second connecting body 2 is bent to be arranged at an angle to the first connecting body 1, the first transition portion 51 is formed into an arc shape. Here, "the first transition portion 51 is formed into an arc shape" means that after the second connecting body 2 is bent relative to the first connecting body 1, the first transition portion 51 finally presents an arc shape. And / or, a second transition portion 52 is provided between the support body 3 and the first connecting body 1 or the second connecting body 2. The second transition portion 52 is constructed such that after the support body 3 is bent to be arranged at an angle to the first connecting body 1 or the second connecting body 2, the second transition portion 52 is formed into an arc shape. Here, "the second transition portion 52 is formed into an arc shape" means that after the support body 3 is bent relative to the first connecting body 1 or the second connecting body 2, the second transition portion 52 finally presents an arc shape.

[0040] This embodiment includes the following three implementation methods.

[0041] A first transition portion 51 is provided between the first connecting body 1 and the second connecting body 2. The first transition portion 51 is constructed such that after the second connecting body 2 is bent to an angle with the first connecting body 1, the first transition portion 51 is formed into an arc shape. In this way, the provision of the first transition portion 51 facilitates the bending of the second connecting body 2. In addition, the arc-shaped structure of the first transition portion 51 enables a smooth connection between the first connecting body 1 and the second connecting body 2 and ensures the durability of the connection.

[0042] Second, a second transition portion 52 is provided between the support body 3 and the first connecting body 1 or the second connecting body 2. The second transition portion 52 is constructed such that after the support body 3 is bent to be arranged at an angle to the first connecting body 1 or the second connecting body 2, the second transition portion 52 is formed into an arc shape. In this way, the provision of the second transition portion 52 facilitates the bending of the support body 3. In addition, the arc-shaped structure of the second transition portion 52 can achieve a smooth connection between the support body 3 and the first connecting body 1 or the second connecting body 2, and ensure the durability of the connection.

[0043] Third, a first transition portion 51 is provided between the first connecting body 1 and the second connecting body 2. The first transition portion 51 is constructed such that after the second connecting body 2 is bent to an angle with the first connecting body 1, the first transition portion 51 is formed into an arc shape. Furthermore, a second transition portion 52 is provided between the support body 3 and the first connecting body 1 or the second connecting body 2. The second transition portion 52 is constructed such that after the support body 3 is bent to an angle with the first connecting body 1 or the second connecting body 2, the second transition portion 52 is formed into an arc shape. Thus, the provision of the first transition portion 51 and the second transition portion 52 facilitates the bending of the second connecting body 2 and the support body 3. In addition, the arc-shaped structure of the first transition portion 51 and the second transition portion 52 enables a smooth connection between the first connecting body 1 and the second connecting body 2, and between the support body 3 and the first connecting body 1 or the second connecting body 2, ensuring the durability of the aforementioned connections.

[0044] According to a second aspect of this disclosure, a battery pack is provided, according to Figure 1-3 As shown, the device includes a battery pack 20 and the aforementioned connecting piece 10, with the first connecting portion 11 electrically connected to the battery pack 20. Furthermore, when the connecting piece 10 is used to achieve a conductive connection between two battery packs 20, the first connecting portion 11 of the connecting piece 10 is electrically connected to the terminal of one battery pack 20, and the second connecting portion 21 of the connecting piece 10 is electrically connected to the connecting strip of the other battery pack 20. When the connecting piece 10 is used to achieve a conductive connection between the battery pack and an external electrical device, the second connecting portion 21 of the connecting piece 10 is electrically connected to the electrical connector of the external electrical device. The conductive connection between the connecting piece 10 and the aforementioned connecting strip or electrical connector can be achieved through a combination of riveting and welding, thereby ensuring a stable and reliable conductive effect of the connecting piece 10.

[0045] In the battery pack provided in this disclosure, as an exemplary embodiment, reference is made to... Figure 1-3 As shown, the battery pack may further include a support beam 30, which may be provided with a clearance portion 301. The clearance portion 301 can be used to avoid the second connector 2. The second connector 2 can be supported on the support beam 30 via a support body 3, and there may be a gap between the support body 3 and the support beam 30. In this way, the second connector 2 can cross the support beam 30 via the clearance portion 301, so as to facilitate the connection between the second connector 2 and the component to be connected 50 (which may be the aforementioned connecting bar or electrical connector). In addition, the gap between the support body 3 and the support beam 30 can not only avoid assembly interference between the support body 3 and the support beam 30, but also avoid tensile stress on the weld of the connecting piece 10 due to the support beam 30 abutting against the connecting piece 10, thereby ensuring the reliability of the connection between the connecting piece 10 and the terminal post of the battery pack 20 or the component to be connected 50.

[0046] It should be noted that when the connecting piece 10 is used to achieve a conductive connection between the two battery packs 20, the support beam 30 refers to the partition beam inside the battery pack used to separate the two battery packs 20; when the connecting piece 10 is used to achieve a conductive connection between the battery pack and external electrical equipment, the support beam 30 refers to the side beam of the battery pack tray.

[0047] In the battery pack provided in this disclosure, as an exemplary embodiment, reference is made to... Figure 1-3 As shown, the connecting piece 10 has an insulating structure on the side facing the support beam 30, and / or, the support beam 30 has an insulating element 40 at the clearance portion 301. The insulating structure and the insulating element 40 can be either an insulating film or a blown (vacuum-formed) insulating sheet. This prevents the support beam 30 from conductively connecting with the connecting piece 10, ensuring the safety of the support beam 30. Furthermore, there is a gap between the support body 3 and the support beam 30, meaning there is air between them. This further ensures the insulation effect and safety of the support beam 30, preventing short circuits or arcing caused by high-voltage electricity conducting through metal.

[0048] According to a third aspect of this disclosure, an electrical device is provided, including the aforementioned connecting piece or battery pack, which has all the aforementioned beneficial effects, which will not be repeated here.

[0049] According to a fourth aspect of this disclosure, an energy storage device is provided, including the aforementioned connecting piece or battery pack, which has all the aforementioned beneficial effects, which will not be repeated here.

[0050] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0051] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0052] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A connecting piece, characterized in that, The connecting piece includes a first connecting body, a second connecting body, and a support body. The first connecting body and the second connecting body are arranged at an angle and respectively form a first connecting portion and a second connecting portion. The support body is used to support the second connecting body on the first connecting body.

2. The connecting piece according to claim 1, characterized in that, One of the first connector or the second connector is connected to the support, and the other has an abutment portion. The support extends from the first connector or the second connector toward the abutment portion and abuts against the abutment portion.

3. The connecting piece according to claim 2, characterized in that, The first connector or the second connector includes a connector body and the abutting portion. The abutting portion is constructed as a protrusion. The protrusion protrudes from opposite sides of the connector body away from the connector body. The end of the support body forms an abutting surface to abut against the protrusion.

4. The connecting piece according to claim 2, characterized in that, The abutment portion is constructed as an arched portion, with a portion of the first connector arching toward the side where the second connector is located to form the arched portion. The support body is connected to the end of the second connector body, and the end of the support body forms an abutment surface, which abuts against the arched portion.

5. The connecting piece according to claim 2, characterized in that, The first connector has an abutment portion, which is configured as a plug-in portion. The second connector is connected to the support body. The end of the support body has a plug-in block. The support body extends from the second connector toward the abutment portion so that the plug-in block is plugged into the plug-in portion.

6. The connecting piece according to any one of claims 1-5, characterized in that, The first connector, the second connector, and the support are integrally formed.

7. The connecting piece according to claim 6, characterized in that, A first transition portion is provided between the first connector and the second connector. The first transition portion is constructed such that, after the second connector is bent to an angle with the first connector, the first transition portion is formed into an arc shape, and / or, A second transition portion is provided between the support body and the first connector or the second connector. The second transition portion is constructed such that after the support body is bent to be arranged at an angle to the first connector or the second connector, the second transition portion is formed into an arc shape.

8. A battery pack, characterized in that, It includes a battery pack and a connecting piece according to any one of claims 1-7, wherein the first connecting portion is electrically connected to the battery pack.

9. The battery pack according to claim 8, characterized in that, The battery pack also includes a support beam, which has a clearance portion for avoiding the second connector. The second connector is supported on the support beam by the support body, and there is a gap between the support body and the support beam.

10. The battery pack according to claim 9, characterized in that, The connecting piece is provided with an insulating structure on the side facing the support beam, and / or the support beam is provided with an insulating element at the clearance portion.

11. An electrical appliance, characterized in that, It includes the connecting piece according to any one of claims 1-7 or the battery pack according to any one of claims 8-9.

12. An energy storage device, characterized in that, It includes the connecting piece according to any one of claims 1-7 or the battery pack according to any one of claims 8-9.

Images