Acquisition assembly and battery pack

Abstract

The utility model provides an acquisition assembly and a battery pack. The acquisition assembly comprises a fuse module and a busbar, the fuse module is arranged on the busbar, the fuse module comprises a connecting sheet, the connecting sheet comprises a first welding section and a second welding section which are connected in sequence, the busbar is provided with a through hole or a groove, the second welding section is U-shaped and is accommodated in the through hole or the groove, and the first welding section is U-shaped; the first welding section is positioned on one surface, far away from the battery cell, of the busbar, is positioned on one side of the through hole or the groove and is welded with the busbar; and the fuse unit is welded with the second welding section and is electrically connected with an external wire harness. According to the utility model, the problem of high cost of the acquisition assembly of the battery pack in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy batteries, and more specifically, to a collection component and a battery pack. Background Art

[0002] A battery pack generally includes battery cells, busbars, collection components, etc. A plurality of battery cells are arranged in sequence to form a battery cell group. At least one battery cell group is included in the battery pack. The battery cells are connected by busbars to achieve current-carrying transmission. The voltage and temperature information of the battery is transmitted to the BMS (Battery Management System) by the collection component.

[0003] As the core component for collecting module information, in the prior art, a wire harness or an FPC is mainly used to implement its function. Compared with a wire harness, the advantage of an FPC is that a fuse can be integrated in the information collection circuit to avoid short circuits between batteries caused by short circuits in the information collection circuit, so the safety is higher. However, different types of batteries require different FPCs, which increases the manufacturing cost and development cycle of the FPC. The advantage of a wire harness is its low cost and short manufacturing cycle. The disadvantage is that a fuse cannot be integrated in the information collection circuit, and the problem of short circuits between batteries caused by short circuits in the information collection circuit cannot be avoided, which greatly affects the safety of the battery. Therefore, while ensuring the safety of the battery, the manufacturing cost of the collection component cannot be guaranteed.

[0004] As can be seen from the above, there is a problem of high cost of the collection component of the battery pack in the prior art. Summary of the Utility Model

[0005] The main object of the present utility model is to provide a collection component and a battery pack to solve the problem of high cost of the collection component of the battery pack in the prior art.

[0006] To achieve the above object, according to one aspect of the present utility model, a collection component is provided, including a fuse module and a busbar. The fuse module is arranged on the busbar. The fuse module includes: a connecting piece, the connecting piece includes a first welding section and a second welding section connected in sequence. The busbar is provided with a through hole or a groove. The second welding section is U-shaped and is accommodated in the through hole or the groove. The first welding section is located on the side of the busbar away from the battery cell and on one side of the through hole or the groove, and is welded to the busbar; a fuse unit, the fuse unit is welded to the second welding section and is electrically connected to an external wire harness.

[0007] Further, the fuse unit includes: an insulating sheet material, a first welding area and a second welding area are respectively arranged on two side surfaces of the insulating sheet material. The first welding area is electrically connected to the external wire harness, and the second welding area is welded to the second welding section; a fuse, the fuse is electrically connected to the first welding area and the second welding area respectively.

[0008] Further, the first welding area and the fuse are disposed on the first surface of the insulating sheet, and the second welding area is disposed on the second surface of the insulating sheet.

[0009] Further, the insulating sheet is provided with a connection hole, the connection hole is located in the overlapping area between the fuse and the second welding area, and a conductive structure is provided at the connection hole so that the fuse is electrically connected to the second welding area through the connection hole.

[0010] Further, the fuse and the first welding area are of an integral structure.

[0011] Further, the first welding area and the second welding area are tin-plated areas.

[0012] Further, the connecting piece further includes a supporting section, the supporting section is sequentially connected to the second welding section, and the supporting section is located on the side of the bus bar away from the battery cell and on the other side of the through hole or the groove.

[0013] Further, draft structures are respectively provided on both sides of the second welding section so that the second welding section is in interference fit with the through hole.

[0014] Further, a draft structure is provided on the side of the second welding section away from the first welding section.

[0015] According to another aspect of the present invention, a battery pack is further provided, including a battery cell and the above-mentioned acquisition assembly, and the acquisition assembly is electrically connected to the battery cell.

[0016] Applying the technical solution of the present invention, the acquisition assembly includes a fuse module and a bus bar. The fuse module is disposed on the bus bar. The fuse module includes a connecting piece and a fuse unit. The connecting piece includes a first welding section and a second welding section that are sequentially connected. The bus bar is provided with a through hole or a groove. The second welding section is U-shaped and accommodated in the through hole or the groove. The first welding section is located on one side of the through hole and is welded to the bus bar. The fuse unit is welded to the second welding section and is electrically connected to an external wire harness. In this way, by providing a through hole in the bus bar, setting the connecting piece to be U-shaped and welding the fuse unit inside, the fuse unit can be fixed on the bus bar through the connecting piece, and then the external wire harness is electrically connected to the fuse unit, so that the wire harness can integrate the fuse unit, overcoming the defect that the wire harness cannot quickly disconnect the circuit in the case of a short circuit of the battery pack. Furthermore, on the premise of ensuring the safety of the battery pack, the manufacturing cost of the acquisition assembly is greatly reduced, and the problem of high cost of the acquisition assembly of the battery pack in the prior art is solved. Description of the Drawings

[0017] The specification drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0018] Figure 1 Shows an exploded view of a fuse module in a specific embodiment of the present utility model;

[0019] Figure 2 Shows a cross-sectional view of a collection component in a specific embodiment of the present utility model;

[0020] Figure 3 Shows a schematic structural view of a collection component in a specific embodiment of the present utility model;

[0021] Figure 4 Shows a schematic structural view of the front and back sides of a fuse unit in a specific embodiment of the present utility model;

[0022] Figure 5 Shows a cross-sectional view of a collection component in another specific embodiment of the present utility model;

[0023] Figure 6 Shows a schematic structural view of the connection between a collection component and an electric core in another specific embodiment of the present utility model.

[0024] Among them, the above-mentioned drawings include the following reference numerals:

[0025] 10. Connection piece; 11. First welding section; 12. Second welding section; 13. Support section; 20. Fuse unit; 21. Insulating sheet material; 211. First surface; 212. Second surface; 213. Connection hole; 22. First welding area; 23. Second welding area; 24. Fuse; 30. Bus bar; 31. Through hole; 40. External wire harness; 50. Electric core. Detailed implementation manners

[0026] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0027] It should be pointed out that unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0028] In the present utility model, unless otherwise stated, the orientation terms such as "upper, lower, top, bottom" are usually in reference to the direction shown in the drawings, or in reference to the vertical, perpendicular or gravitational direction of the component itself; similarly, for the convenience of understanding and description, "inner, outer" refer to the inner and outer of the contour of each component itself, but the above orientation terms are not used to limit the present utility model.

[0029] Obviously, the embodiments described above are only a part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0030] In order to solve the problem of the relatively high cost of the acquisition component of the battery pack in the prior art, the present utility model provides an acquisition component and a battery pack. Among them, the following battery pack includes the following acquisition component.

[0031] As Figures 1 to 6 shown, the acquisition component includes a fuse module and a bus bar 30, and the fuse module is arranged on the bus bar 30. The fuse module includes a connecting piece 10 and a fuse unit 20. The connecting piece 10 includes a first welding section 11 and a second welding section 12 that are sequentially connected. The bus bar 30 is provided with a through hole 31. The second welding section 12 is U-shaped and is accommodated in the through hole 31. The first welding section 11 is located on the side of the bus bar 30 away from the battery cell 50 and on one side of the through hole 31, and is welded to the bus bar 30. The fuse unit 20 is welded to the second welding section 12 and is electrically connected to the external wire harness 40. It can be understood that the connecting piece 10 is a conductive metal sheet.

[0032] By providing that the acquisition component includes a fuse module and a bus bar 30, the fuse module is arranged on the bus bar 30, the fuse module includes a connecting piece 10 and a fuse unit 20, the connecting piece 10 includes a first welding section 11 and a second welding section 12 that are sequentially connected, the bus bar 30 is provided with a through hole 31, the second welding section 12 is U-shaped and passes through the through hole 31, the first welding section 11 is located on one side of the through hole 31 and is welded to the bus bar 30, the fuse unit 20 is welded to the second welding section 12 and is electrically connected to the external wire harness 40, in this way, by providing a through hole 31 on the bus bar 30, setting the connecting piece 10 to be U-shaped and welding the fuse unit 20 inside, the fuse unit 20 can be fixed on the bus bar 30 through the connecting piece 10, and then the external wire harness 40 is electrically connected to the fuse unit 20, so as to realize that the wire harness can integrate the fuse unit 20, overcome the defect that the wire harness cannot quickly disconnect the circuit in the case of a short circuit of the battery pack, and further greatly reduce the manufacturing cost of the acquisition component on the premise of ensuring the safety of the battery pack.

[0033] Specifically, the whole of the first welding section 11 and the second welding section 12 is similar to a C-shaped with only one side edge. The second welding section 12 is U-shaped to form a U-shaped accommodation groove. The fuse unit 20 is accommodated in the accommodation groove and is welded to the second welding section 12. The bus bar 30 has a certain thickness, and the height of the second welding section 12 is less than the thickness of the bus bar 30, so that the second welding section 12 will not penetrate the bus bar 30 from the other side, avoiding affecting the connection between the bus bar 30 and the battery cell 50.

[0034] In this embodiment, as Figure 3 shown, there may be two through holes 31, and the two through holes 31 are respectively located at both ends of the bus bar 30 corresponding to two adjacent battery cells 50, and the fuse module is selectively disposed at one of the through holes 31.

[0035] In an alternative embodiment, the bus bar 30 is provided with a groove instead of the through hole 31, and the second welding section 12 is received in the groove. That is to say, the receiving structure of the second welding section 12 may or may not penetrate the bus bar 30, as long as sufficient receiving space is provided for the second welding section 12. Further, the lower side surface of the second welding section 12 may be spaced apart from or in contact with the bottom surface of the groove. The first welding section 11 is located on a side of the bus bar 30 away from the battery cell 50 and on one side of the groove.

[0036] Further, as Figures 1 to 2 shown, the connecting piece 10 further includes a supporting section 13, the supporting section 13 is sequentially connected to the second welding section 12, and the supporting section 13 is located on the other side of the through hole 31. That is to say, the connecting piece 10 in this embodiment is integrally shaped like a capital letter "J", and both sides of the second welding section 12 are fixed by welding the first welding section 11 to the bus bar 30 and fitting the supporting section 13 to the bus bar 30.

[0037] In this embodiment, both sides of the second welding section 12 are respectively provided with a draft structure to enable the second welding section 12 to be in interference fit with the through hole 31. Specifically, the two side walls of the second welding section 12 gradually expand outward from top to bottom to form a draft structure. That is to say, the second welding section 12 is in the shape of a flared "U". By providing the draft structure, the fuse module can be pre-fixed at the through hole 31 in an interference fit manner.

[0038] As Figure 5 shown, in an alternative embodiment, one side of the second welding section 12 away from the first welding section 11 is provided with a draft structure. That is to say, the connecting piece 10 in this embodiment has only one draft structure and does not need to be provided with a supporting section 13. The connection and fixation of the connecting piece 10 to the bus bar 30 can be achieved only by the draft structure, thereby reducing the usage amount of the metal sheet raw material and lowering the manufacturing cost.

[0039] As Figure 4 shown, the fuse unit 20 includes an insulating sheet 21 and a fuse 24. First welding areas 22 and second welding areas 23 are respectively disposed on both side surfaces of the insulating sheet 21. The first welding areas 22 are electrically connected to the external wire harness 40, and the second welding areas 23 are welded to the second welding section 12. The fuses 24 are respectively electrically connected to the first welding areas 22 and the second welding areas 23.

[0040] As Figure 4As shown in the figure, in this embodiment, the first welding area 22 and the fuse 24 are disposed on the first surface 211 of the insulating sheet 21, and the second welding area 23 is disposed on the second surface 212 of the insulating sheet 21. It can be understood that when the fuse unit 20 is disposed on the connecting piece 10, the second surface 212 of the insulating sheet 21 is in contact with the second welding section 12 of the connecting piece 10. In order to prevent the first welding area 22 and the fuse 24 from directly contacting the connecting piece 10, the first welding area 22 and the fuse 24 need to be disposed on the first surface 211 of the insulating sheet 21, so as to isolate the first welding area 22 and the fuse 24 from the connecting piece 10 through the insulating sheet 21. Then, the second welding area 23 is disposed on the second surface 212 of the insulating sheet 21, so as to achieve electrical connection with the connecting piece 10, and further achieve electrical connection with the bus bar 30.

[0041] In this embodiment, the first welding area 22 and the second welding area 23 are tin-plated areas.

[0042] Furthermore, in this embodiment, the fuse 24 and the first welding area 22 are of an integral structure. Since the fuse 24 and the first welding area 22 are located on the same side of the insulating sheet 21, setting the fuse 24 and the first welding area 22 as an integral structure can improve the structural strength of the fuse 24 and the first welding area 22 and extend the service life.

[0043] As Figure 4 shown, the insulating sheet 21 is provided with a connection hole 213. The connection hole 213 is located in the overlapping area between the fuse 24 and the second welding area 23, and a conductive structure is disposed at the connection hole 213 to enable the fuse 24 to be electrically connected to the second welding area 23 through the connection hole 213. Specifically, the conductive structure may be a metal plating layer disposed on the surface of the connection hole 213, and the metal plating layer extends to the first surface 211 and the second surface 212 of the insulating sheet 21 respectively. One end of the fuse 24 and one end of the second welding area 23 are respectively welded to the metal plating layer. Of course, the conductive structure may also be a metal column or the like fixed in the connection hole 213, which can be selected according to actual needs.

[0044] As Figure 6 shown, the present application further provides a battery pack, including a battery cell 50 and the above-mentioned acquisition assembly, and the acquisition assembly is electrically connected to the battery cell 50.

[0045] As Figure 6As shown, in this embodiment, the busbar 30 is electrically connected to the battery cell 50, and the fuse unit 20 is electrically connected to the battery management system through the external wire harness 40, thus forming a sampling circuit. The sampling circuit collects the voltage of the battery cell 50 through the first welding section 11 of the connecting piece 10, and then transmits it to the battery management system through the fuse unit 20 and the external wire harness 40 in sequence, so as to monitor the state of the battery cell 50 in real time. When the current in the sampling circuit abnormally increases and generates heat, the fuse 24 melts itself to cut off the current, thus protecting the safe operation of the entire battery pack. When a short circuit occurs in a certain sampling circuit, only the fuse unit 20 in the corresponding sampling circuit needs to be replaced.

[0046] From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects: by setting the acquisition component to include a fuse module and a busbar 30, the fuse module is arranged on the busbar 30, the fuse module includes a connecting piece 10 and a fuse unit 20, the connecting piece 10 includes a first welding section 11 and a second welding section 12 connected in sequence, the busbar 30 is provided with a through hole 31 or a groove, the second welding section 12 is U-shaped and accommodated in the through hole 31 or the groove, the first welding section 11 is located on the side of the busbar 30 away from the battery cell 50 and on one side of the through hole 31 or the groove and is welded to the busbar 30, the fuse unit 20 is welded to the second welding section 12 and is electrically connected to the external wire harness 40. In this way, by opening a through hole 31 or a groove on the busbar 30, setting the connecting piece 10 to be similar to U-shaped and welding the fuse unit 20 inside, the fuse unit 20 can be fixed on the busbar 30 through the connecting piece 10, and then the external wire harness 40 is electrically connected to the fuse unit 20, so as to realize that the wire harness can integrate the fuse unit 20, overcome the defect that the wire harness cannot quickly disconnect the circuit in the case of a battery pack short circuit, and further greatly reduce the manufacturing cost of the acquisition component on the premise of ensuring the safety of the battery pack.

[0047] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0048] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above drawings are used to distinguish similar objects and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0049] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A collection component, characterized in that: It comprises a fuse module and a busbar (30), wherein the fuse module is arranged on the busbar (30), and the fuse module comprises: A connecting sheet (10), the connecting sheet (10) comprising a first welding section (11) and a second welding section (12) connected in sequence, the busbar (30) being provided with a through hole (31) or a groove, the second welding section (12) being U-shaped and accommodated in the through hole (31) or the groove, the first welding section (11) being located on a side of the busbar (30) away from the battery cell (50) and on a side of the through hole (31) or the groove, and being welded to the busbar (30); A fuse unit (20) is welded to the second welding section (12) and is electrically connected to an external wiring harness (40).

2. The collection component according to claim 1, characterized in that: The fuse unit (20) comprises: An insulating sheet (21), wherein a first welding area (22) and a second welding area (23) are respectively provided on both side surfaces of the insulating sheet (21), the first welding area (22) being electrically connected to the external wiring harness (40), and the second welding area (23) being welded to the second welding section (12); A fuse (24), wherein the fuse (24) is electrically connected to the first welding area (22) and the second welding area (23) respectively.

3. The collection component according to claim 2, characterized in that: The first welding area (22) and the fuse (24) are arranged on a first surface (211) of the insulating sheet (21), and the second welding area (23) is arranged on a second surface (212) of the insulating sheet (21).

4. The collection component according to claim 2, characterized in that: The insulating sheet (21) is provided with a connection hole (213), the connection hole (213) is located in the overlapping area of ​​the fuse (24) and the second welding area (23), and a conductive structure is provided at the connection hole (213) so that the fuse (24) is electrically connected to the second welding area (23) through the connection hole (213).

5. The collection component according to claim 2, characterized in that: The fuse (24) and the first welding area (22) are an integrated structure.

6. The collection component according to claim 2, characterized in that: The first welding area (22) and the second welding area (23) are tin-plated areas.

7. The collection assembly according to claim 1, characterized in that: The connecting piece (10) further comprises a supporting section (13), wherein the supporting section (13) is connected in sequence to the second welding section (12), and the supporting section (13) is located on a side of the busbar (30) away from the battery core (50) and on the other side of the through hole (31) or the groove.

8. The collection assembly according to claim 1, characterized in that: Both sides of the second welding section (12) are provided with draft structures respectively, so that the second welding section (12) and the through hole (31) are interference-fitted.

9. The collection assembly according to claim 1, characterized in that: A side of the second welding section (12) away from the first welding section (11) has a draft structure.

10. A battery pack, characterized in that: It comprises a battery cell (50) and a collection component according to any one of claims 1 to 9, wherein the collection component is electrically connected to the battery cell (50).

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