Integrated busbar, battery pack and electric equipment

Abstract

The utility model relates to an integrated busbar, a battery pack and electric equipment. The integrated busbar comprises an insulating substrate, a circuit board, an electric connecting piece and a restraining piece, the circuit board is flatly laid on the insulating base body, the electric connecting piece is connected to the circuit board, the restraining piece is connected to the insulating base body, and the two ends of the restraining piece extend and protrude out of the insulating base body and are used for being connected with an end plate of a battery pack. According to the integrated busbar, the circuit board, the electric connecting pieces and the restraining pieces are integrated on the insulating base body, integration is achieved, the installation and assembly steps are simplified, the production efficiency is improved, the production cost is reduced, meanwhile, the restraining pieces are integrated on the insulating base body, the restraining pieces can be integrally connected to the battery cells, and the reliability of the integrated busbar is improved. The restraining part can restrain the battery cell assembly, and can restrain sampling abnormity, electric leakage and the like caused by expansive force.

Description

Technical Field

[0001] The present disclosure relates to the field of battery manufacturing technology, and in particular, to an integrated busbar, a battery pack and an electrical device. Background Art

[0002] The integrated busbar is a structure in the battery pack used to realize the series circuit and collect the signals of the battery cell components.

[0003] In the related technologies, the related structures of the integrated busbar are mostly split designs, the functional modules are relatively dispersed, and the degree of integration is low, which makes the assembly too complicated, prone to assembly misalignment, and high in cost. Utility Model Content

[0004] The purpose of the present disclosure is to provide an integrated busbar, battery pack and electrical equipment to solve the problems in the above-mentioned related technologies.

[0005] In order to achieve the above-mentioned object, one aspect of the present disclosure provides an integrated busbar, including an insulating substrate, a circuit board, an electrical connector and a restraint;

[0006] The circuit board is laid flat on the insulating substrate, the electrical connector is connected to the circuit board, the restraint is connected to the insulating substrate, both ends of the restraint extend out of the insulating substrate and are used to connect the cell assembly with the end plate of the battery pack.

[0007] Optionally, the restraint includes a plate body, a connecting portion and a connecting piece, the plate body is constructed as a long strip structure, the plate body is laid flat in the insulating base, the connecting portion is located outside the insulating base, the connecting portion is connected to the end of the plate body, and a connecting piece is provided on the connecting portion, and the connecting piece is used to connect to the end plate of the battery pack.

[0008] Optionally, the insulating substrate includes an insulating base layer and an insulating cover layer;

[0009] The insulating covering layer covers the insulating base layer, the circuit board is laid flat on the insulating base layer, and the circuit board, the electrical connector and the restraint are all located between the insulating covering layer and the insulating base layer.

[0010] Optionally, the restraint member is located between the circuit board and the insulating base layer.

[0011] Optionally, the insulating base layer is configured as an insulating plate, the insulating covering layer is configured as an insulating film, and the insulating film covers the insulating plate.

[0012] Optionally, connecting pins are integrated on the circuit board, the connecting pins protrude from the circuit board, and the connecting pins are connected to the electrical connector.

[0013] Optionally, a first via hole is formed on the insulating substrate, and the first via hole corresponds to the electrical connector and the connecting pin.

[0014] The insulating substrate is provided with a second via hole, and the second via hole corresponds to the electrical connector and the pole of the battery cell.

[0015] Optionally, the electrical connector includes a first electrical connector and a second electrical connector, the number of the first electrical connector is two, and the first electrical connector is used to electrically connect to an external structure, and the number of the second electrical connector is greater than two, and the second electrical connector is used to connect to electrodes of a battery cell assembly.

[0016] Optionally, the first electrical connector includes a first body, the first body is provided with a first connecting portion and a second connecting portion, the first connecting portion is used to be electrically connected to a pole of the battery cell, and the second connecting portion is used to be electrically connected to an external structure;

[0017] The second electrical connector includes a second body, and the second body is provided with two third connecting parts arranged opposite to each other, and the two third connecting parts are both used for electrically connecting to the pole of the battery cell.

[0018] A second aspect of the present disclosure further provides a battery pack, comprising a cell assembly, a tray, an end plate and the above-mentioned integrated busbar;

[0019] The battery cell assembly is connected to the tray, the end plate is connected to the inner side wall of the tray, the end plate is connected to the side of the battery cell assembly to fix the battery cell assembly, and the restraint of the integrated busbar is connected to the end plate.

[0020] The third aspect of the present disclosure also provides an electrical device, including the above-mentioned integrated busbar, or the above-mentioned battery pack.

[0021] The above technical solution realizes integration by integrating the circuit board, the electrical connector and the restraint into the insulating substrate, so that the circuit board, the electrical connector and the restraint are centrally arranged. Therefore, during assembly, the insulating substrate is installed on the battery cell assembly, and then the electrical connector and the restraint are connected at corresponding positions to realize the installation and fixation of the integrated busbar, which simplifies the installation and assembly steps, improves production efficiency and reduces production costs. At the same time, the restraint is integrated into the insulating substrate, so that the restraint can also be integrally connected to the battery cell. The restraint can realize the restraint of the battery cell assembly, which can suppress sampling anomalies, leakage, etc. caused by expansion force.

[0022] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0024] Figure 1 is an exploded view of an integrated busbar according to an embodiment of the present disclosure;

[0025] Figure 2 is a three-dimensional schematic diagram of a circuit board and a restraining member according to an embodiment of the present disclosure;

[0026] Figure 3 It is a structural schematic diagram of a circuit board and a restraining member from one perspective of an embodiment of the present disclosure;

[0027] Figure 4 This is an embodiment of the present disclosure. Figure 3 A magnified schematic diagram of position A in the middle;

[0028] Figure 5 is a schematic structural diagram of an insulating cover layer according to an embodiment of the present disclosure;

[0029] Figure 6 is a schematic structural diagram of an insulating base layer according to an embodiment of the present disclosure;

[0030] Figure 7 is an exploded view of a battery pack according to an embodiment of the present disclosure.

[0031] Description of Reference Numerals

[0032] 1. insulating substrate, 11. insulating base layer, 12. insulating cover layer, 13. first via hole;

[0033] 2. Circuit board, 21. Connecting pins;

[0034] 3. electrical connector, 31. first electrical connector, 32. second electrical connector;

[0035] 4. restraint member, 41. plate body, 42. connecting portion, 43. connecting member;

[0036] 5. tray, 51. end plate;

[0037] 6. Battery cell components. DETAILED DESCRIPTION

[0038] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0039] In the present disclosure, unless otherwise stated, directional words such as "upper, lower, left, right" are usually defined by the direction of the drawing, and "inner" and "outer" refer to the inside and outside of the relevant parts. In addition, the terms "first", "second", etc. are only used to distinguish descriptions and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present disclosure, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" 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 direct connection, it can be indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0041] like Figure 1-Figure 6 As shown, one aspect of the present disclosure provides an integrated busbar, including an insulating substrate 1, a circuit board 2, an electrical connector 3 and a restraint 4.

[0042] The circuit board 2 is laid flat on the insulating substrate 1, the electrical connector 3 is connected to the circuit board 2, the restraint 4 is connected to the insulating substrate 1, and both ends of the restraint 4 extend out of the insulating substrate 1 and are used to connect with the end plate 51 of the battery pack.

[0043] The insulating substrate 1 is used to support the circuit board 2, the electrical connector 3 and the restraint 4, and to position the circuit board 2. The insulating substrate 1 is mounted on the battery cell assembly 6. The electrical connector 3 can be connected to the electrode of the battery cell assembly 6 and can be electrically connected to the external structure.

[0044] In the above technical solution, the circuit board 2, the electrical connector 3 and the restraint 4 are integrated into the insulating substrate 1, so that the circuit board 2, the electrical connector 3 and the restraint 4 are centrally arranged, and integration is achieved. Therefore, when assembling, the insulating substrate 1 is installed on the battery cell assembly 6, and then the electrical connector 3 and the restraint 4 are connected at corresponding positions to achieve the installation and fixation of the integrated busbar, which simplifies the installation and assembly steps, improves production efficiency, and reduces production costs. At the same time, the restraint 4 is integrated into the insulating substrate 1, so that the restraint 4 can also be integrally connected to the battery cell. The restraint of the battery cell assembly 6 can be achieved through the restraint 4, which can suppress sampling anomalies, leakage, etc. caused by expansion force.

[0045] Optionally, in one embodiment of the present disclosure, the restraint 4 includes a plate body 41, a connecting portion 42 and a connecting member 43, the plate body 41 is constructed as a long strip structure, the plate body 41 is laid flat on the insulating substrate 1, the connecting portion 42 is located outside the insulating substrate 1, the connecting portion 42 is connected to the end of the plate body 41, and a connecting member 43 is provided on the connecting portion 42, and the connecting member 43 is used to connect to the end plate 51 of the battery pack.

[0046] The plate 41 is connected to the insulating substrate 1, which is conducive to integration. The plate 41 is laid flat on the insulating substrate 1 to reduce the thickness of the insulating substrate 1, thereby not affecting the thickness of the battery pack. The connecting portion 42 and the connecting member 43 are arranged on the outside of the insulating substrate 1, which is convenient for connecting with the end plate 51 of the battery pack, and does not affect the setting of the insulating substrate 1 on the battery cell assembly 6.

[0047] In some examples, end plates 51 are provided on both sides of the battery module, and connecting parts 42 are provided on both ends of the plate body 41, and the connecting parts 43 on the connecting parts 42 at both ends of the plate body 41 are respectively connected to the two end plates 51, so as to maintain the clamping effect of the end plates 51 on the battery cell assembly 6. Optionally, in other examples, the end plate 51 can be provided on only one side, and the connecting parts 43 of the connecting parts 42 can also be connected to the tray 5 of the battery pack to achieve the restraining effect on the battery cell assembly 6.

[0048] In some examples, the connecting portion 42 is also constructed as a plate-like structure, the connecting portion 42 and the plate body 41 are integrally formed, the connecting member 43 is configured as a bolt, a through hole or a screw hole is opened on the connecting portion 42, the bolt is connected to the through hole or the screw hole, and a connecting hole is opened on the corresponding end plate 51, and the bolt is threadedly matched with the connecting hole. The plate body 41 and the connecting portion 42 can be made of CR420 / 780DP high-strength steel, which has excellent yield strength.

[0049] Optionally, in another embodiment of the present disclosure, the restraint 4 may be a drawstring or a drawbar, and both ends of the drawstring or drawbar may be connected to the end plate 51 by bolts or pins.

[0050] Optionally, in an embodiment of the present disclosure, the insulating substrate 1 includes an insulating base layer 11 and an insulating cover layer 12 .

[0051] The insulating cover layer 12 covers the insulating base layer 11 , the circuit board 2 is laid flat on the insulating base layer 11 , and the circuit board 2 , the electrical connector 3 and the restraint member 4 are all located between the insulating cover layer 12 and the insulating base layer 11 .

[0052] The insulating cover layer 12 is located above the insulating base layer 11. The insulating base layer 11 is used to support and position the circuit board 2, the electrical connector 3 and the restraint 4. The insulating cover layer 12 covers the circuit board 2, the electrical connector 3 and the restraint 4 while covering the insulating base layer 11. This arrangement is conducive to production and integration. The insulating cover layer 12 and the insulating base layer 11 can achieve upper and lower insulation respectively.

[0053] Optionally, in one embodiment of the present disclosure, the restraint 4 is located between the circuit board 2 and the insulating base layer 11. It can be understood that the board body 41 in the above embodiment is laid flat on the insulating base layer 11, and the circuit board 2 is partially covered on the restraint 4 when it is laid flat on the insulating base layer 11. By such a configuration, the restraint 4 can be prevented from interfering with the connection between the electrical connector 3 and the battery cell assembly 6.

[0054] Optionally, in one embodiment of the present disclosure, the insulating base layer 11 is constructed as an insulating plate, and the insulating cover layer 12 is constructed as an insulating film, and the insulating film is covered on the insulating plate by a hot pressing process. This can facilitate processing and manufacturing, realize integrated hot pressing packaging and fixing, and integrate the circuit board 2, the electrical connector 3, and the restraint 4 with the insulating base layer 11 and the insulating cover layer 12, while improving the sealing of the circuit, oxidation resistance and corrosion resistance, and improving reliability and related performance.

[0055] In some examples, the insulation board can be made of modified PPS, which has excellent electrical properties, high temperature resistance, and physical and mechanical properties, and has a lower cost than epoxy resin.

[0056] Optionally, in another embodiment of the present disclosure, the insulating substrate 1 may be an insulating board formed by injection molding or vacuum molding, and the circuit board 2, the electrical connector 3 and the restraint 4 are laid flat on the surface of the insulating board.

[0057] Optionally, in one embodiment of the present disclosure, a connecting pin 21 is integrated on the circuit board 2, the connecting pin 21 protrudes from the circuit board 2, and the connecting pin 21 is connected to the electrical connector 3. The connecting pin 21 can be directly connected to the electrical connector 3 to achieve electrical conduction between the circuit board 2 and the electrical connector 3, without the need to additionally set up a nickel sheet or other structure, thereby saving material costs and improving the degree of integration. It is understandable that the connecting pin 21 is integrally formed with the circuit board 2, and the number of the connecting pins 21 is consistent with the number of the electrical connector 3.

[0058] Optionally, in one embodiment of the present disclosure, a first via hole 13 is provided on the insulating substrate 1, and the first via hole 13 corresponds to the electrical connector 3 and the connecting pin 21, and the connecting pin 21 is welded to the electrical connector 3 through the first via hole 13. The first via hole 13 can be provided to facilitate the welding operation of the connecting pin 21 and the electrical connector 3, which is beneficial to the assembly operation.

[0059] In some examples, the first via 13 is disposed on the insulating cover layer 12 of the above embodiment, so that the connection pins 21 and the electrical connector 3 can be welded from top to bottom.

[0060] Optionally, in one embodiment of the present disclosure, a second via hole is provided on the insulating substrate 1, and the second via hole corresponds to the electrical connector 3 and the pole of the battery cell, and the electrical connector 3 and the pole of the battery cell are welded through the second via hole. The second via hole can facilitate the welding operation of the electrical connector 3 and the pole of the battery cell, which is conducive to the assembly operation.

[0061] In some examples, the second via hole is disposed on the insulating cover layer 12 of the above embodiment, so that the electrical connector 3 and the pole of the battery cell can be welded from top to bottom.

[0062] The first via hole 13 and the second via hole refer to holes through which corresponding process operations can be performed to achieve relevant connections. Optionally, in one embodiment of the present disclosure, the electrical connector 3 includes a first electrical connector 31 and a second electrical connector 32, the number of the first electrical connector 31 is two, and the first electrical connector 31 is used to electrically connect to an external structure, and the number of the second electrical connector 32 is greater than two, and the second electrical connector 32 is used to connect to the electrodes of the battery cell assembly 6.

[0063] Among them, the first electrical connector 31 is set as the total positive and negative electrical connector 3, which is used to electrically connect to the external structure, and the second electrical connector 32 is set as the branch electrical connector 3 connected to the electrode of the battery cell assembly 6. The number of branch electrical connectors 3 is multiple and arranged at intervals, which can be adjusted according to the distribution of the electrodes of the battery cell assembly 6. In some examples, the first electrical connector 31 and the second electrical connector 32 are both constructed as sheet structures, the first electrical connector 31 is made of copper and aluminum, and the second electrical connector 32 is made of aluminum.

[0064] Optionally, in one embodiment of the present disclosure, the first electrical connector 31 includes a first body, the first body is provided with a first connecting portion and a second connecting portion, the first connecting portion is used to electrically connect to the pole of the battery cell, and the second connecting portion is used to electrically connect to the external structure.

[0065] The second electrical connector 32 includes a second body, and the second body is provided with two third connecting portions which are arranged opposite to each other, and the two third connecting portions are both used for electrically connecting to the poles of the battery cell.

[0066] like Figure 7 As shown, the second aspect of the present disclosure further provides a battery pack, including a cell assembly 6, a tray 5, an end plate 51 and the above-mentioned integrated busbar.

[0067] The cell assembly 6 is connected to the tray 5, the end plate 51 is connected to the inner side wall of the tray 5, the end plate 51 is connected to the side of the cell assembly 6 to fix the cell assembly 6, and the restraint 4 of the integrated busbar is connected to the end plate 51. After the connection piece 43 of the restraint 4 is connected to the end plate 51, the cell assembly 6 is clamped. It can be understood that the cell assembly 6 includes a plurality of single cells arranged in parallel.

[0068] The third aspect of the present disclosure further provides an electric device, comprising the above-mentioned integrated busbar, or the above-mentioned battery pack. The electric device may include a vehicle.

[0069] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0070] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0071] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. An integrated busbar, characterized in that: It includes an insulating substrate, a circuit board, an electrical connector and a restraining member; The circuit board is laid flat on the insulating substrate, the electrical connector is connected to the circuit board, the restraint is connected to the insulating substrate, both ends of the restraint extend out of the insulating substrate and are used to connect to the end plates of the battery pack.

2. The integrated busbar according to claim 1, characterized in that: The restraint includes a plate body, a connecting part and a connecting piece. The plate body is constructed as a long strip structure. The plate body is laid flat in the insulating base. The connecting part is located outside the insulating base. The connecting part is connected to the end of the plate body. A connecting piece is provided on the connecting part. The connecting piece is used to connect to the end plate of the battery pack.

3. The integrated busbar according to claim 1, characterized in that: The insulating substrate comprises an insulating base layer and an insulating cover layer; The insulating covering layer covers the insulating base layer, the circuit board is laid flat on the insulating base layer, and the circuit board, the electrical connector and the restraint are all located between the insulating covering layer and the insulating base layer.

4. The integrated busbar according to claim 3, characterized in that: The restraining member is located between the circuit board and the insulating base layer.

5. The integrated busbar according to claim 3, characterized in that: The insulating base layer is configured as an insulating plate, and the insulating cover layer is configured as an insulating film, and the insulating film covers the insulating plate.

6. The integrated busbar according to claim 1, characterized in that: The circuit board is integrated with connecting pins, the connecting pins protrude from the circuit board, and the connecting pins are connected to the electrical connector.

7. The integrated busbar according to claim 6, characterized in that: The insulating substrate is provided with a first via hole, and the first via hole corresponds to the electrical connector and the connecting pin.

8. The integrated busbar according to claim 1, characterized in that: The insulating substrate is provided with a second via hole, and the second via hole corresponds to the electrical connector and the pole of the battery cell.

9. The integrated busbar according to claim 1, characterized in that: The electrical connector includes a first electrical connector and a second electrical connector. The number of the first electrical connectors is two and the first electrical connectors are used to electrically connect to an external structure. The number of the second electrical connectors is greater than two and the second electrical connectors are used to connect to electrodes of a battery cell assembly.

10. The integrated busbar according to claim 9, characterized in that: The first electrical connector includes a first body, the first body is provided with a first connection portion and a second connection portion, the first connection portion is used to be electrically connected to the pole of the battery cell, and the second connection portion is used to be electrically connected to the external structure; The second electrical connector includes a second body, and the second body is provided with two third connecting parts arranged opposite to each other, and the two third connecting parts are both used for electrically connecting to the pole of the battery cell.

11. A battery pack, characterized in that: Comprising a battery cell assembly, a tray, an end plate and an integrated busbar as claimed in any one of claims 1 to 10; The battery cell assembly is connected to the tray, the end plate is connected to the inner side wall of the tray, the end plate is connected to the side of the battery cell assembly to fix the battery cell assembly, and the restraint of the integrated busbar is connected to the end plate.

12. An electrical device, characterized in that: Comprising the integrated busbar as described in any one of claims 1-10, or the battery pack as described in claim 11.

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