Acquisition assembly and battery pack

Abstract

The utility model provides an acquisition assembly and a battery pack. The collection assembly comprises a fuse module and a busbar, the fuse module is arranged on the busbar, at least one part of the fuse module extends out of the busbar in the horizontal direction, the fuse module comprises a connecting piece, the connecting piece comprises a first welding section and a second welding section which are connected in sequence, and the busbar is provided with a through hole or a groove; the first welding section is accommodated in the through hole or the groove, and the second welding section is positioned on one side, 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] This utility model relates to the field of new energy battery technology, and more specifically, to a data acquisition component and a battery pack. Background Technology

[0002] A battery pack typically includes battery cells, busbars, and data acquisition units. Multiple battery cells are arranged sequentially to form a cell group. A battery pack includes at least one cell group. The cells are connected by busbars to achieve current transfer. The battery's voltage and temperature information is transmitted to the BMS (Battery Management System) by the data acquisition units.

[0003] As the core component for information acquisition in battery packs, the data acquisition module currently primarily utilizes wiring harnesses or freeform circuits (FPCs) to achieve its function. Compared to wiring harnesses, FPCs offer the advantage of integrating fuses into the data acquisition circuit, preventing short circuits between batteries caused by short circuits in the data acquisition circuit, thus providing higher safety. However, different types of batteries require different FPCs, increasing the manufacturing cost and development cycle of FPCs. Wiring harnesses offer the advantages of lower cost and shorter manufacturing cycle; however, they cannot integrate fuses into the data acquisition circuit, making it impossible to prevent short circuits between batteries caused by short circuits in the data acquisition circuit, significantly impacting battery safety. Therefore, while ensuring battery safety, it is impossible to guarantee the manufacturing cost of the data acquisition module.

[0004] As can be seen from the above, the existing technology suffers from the problem of high cost of the battery pack's data acquisition components. Utility Model Content

[0005] The main objective of this invention is to provide a data acquisition component and a battery pack to solve the problem of high cost of data acquisition components in existing battery packs.

[0006] To achieve the above objectives, according to one aspect of the present invention, a data acquisition component is provided, including a fuse module and a busbar. The fuse module is disposed on the busbar, and at least a portion of the fuse module extends horizontally out of the busbar. The fuse module includes: a connecting piece, the connecting piece including a first welding segment and a second welding segment connected in sequence; the busbar having a through hole or groove; the first welding segment being accommodated in the through hole or groove; the second welding segment being located on the side of the busbar away from the battery cell and on the side of the through hole or groove, and welded to the busbar; and a fuse unit, the fuse unit being welded to the second welding segment and electrically connected to an external wiring harness.

[0007] Furthermore, the fuse unit includes: an insulating sheet, on both sides of which are respectively provided a first welding area and a second welding area, the first welding area being electrically connected to an external wiring harness, and the second welding area being welded to a second welding segment; and a fuse, which is electrically connected to both the first welding area and the second welding area.

[0008] Furthermore, 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] Furthermore, the insulating sheet has a connection hole located in the overlapping area of ​​the fuse and the second welding area. A conductive structure is provided at the connection hole so that the fuse can be electrically connected to the second welding piece through the connection hole.

[0010] Furthermore, the insulating sheet has a notch located on the side of the insulating sheet away from the first welded section. The fuse unit also includes a fixing adhesive layer housed within the notch for fixing the external wiring harness.

[0011] Furthermore, the fuse and the first welding area are an integral structure.

[0012] Furthermore, the first welding segment has a draft structure on both sides or a draft structure on the side of the first welding segment away from the second welding segment, so that the first welding segment can be interference-fitted with the through hole or groove.

[0013] Furthermore, the fuse unit is located at the end of the second welding section away from the first welding section, and the end of the second welding section away from the first welding section has an upwardly bent stop edge for limiting and stopping the fuse unit.

[0014] According to another aspect of the present invention, a battery pack is also provided, including a battery cell and the aforementioned data acquisition component, wherein the data acquisition component is electrically connected to the battery cell.

[0015] Furthermore, the battery pack also includes an isolation plate, which is disposed between the acquisition component and the battery cell. The isolation plate is provided with a boss, which is correspondingly provided with the fuse module to support the part of the fuse module that extends out of the busbar.

[0016] The present invention provides a data acquisition component comprising a fuse module and a busbar. The fuse module is disposed on the busbar, with at least a portion extending horizontally out of the busbar. The fuse module includes a connecting piece and a fuse unit. The connecting piece includes a first welding segment and a second welding segment connected sequentially. The busbar has a through hole or groove. The first welding segment is accommodated within the through hole or groove, and the second welding segment is located on one side of the through hole and welded to the busbar. The fuse unit is welded to the second welding segment and electrically connected to an external wiring harness. By creating a through hole or groove on the busbar, accommodating the first welding segment within the through hole or groove, and welding the fuse unit to the second welding segment, the fuse unit can be fixed to the busbar via the connecting piece. Furthermore, the external wiring harness can be electrically connected to the fuse unit, thereby enabling the wiring harness to integrate the fuse unit. This overcomes the defect that the wiring harness cannot quickly disconnect the circuit in the event of a short circuit in the battery pack. Furthermore, while ensuring the safety of the battery pack, the manufacturing cost of the data acquisition component is significantly reduced, solving the problem of high cost of data acquisition components for battery packs in the prior art. In addition, by setting the fuse module to extend at least part of it horizontally out of the busbar, this part can be supported by the structure on the isolation plate, thereby enhancing the structural strength of the fuse module and facilitating the connection between the external wiring harness and the fuse module. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic diagram of the fuse module in a specific embodiment of the present invention is shown;

[0019] Figure 2 A schematic diagram of the connecting piece in a specific embodiment of this utility model is shown;

[0020] Figure 3 The diagram shows the front and back structural schematics of a fuse unit in a specific embodiment of the present invention;

[0021] Figure 4 This diagram shows a fuse unit before it is connected to an external wiring harness in a specific embodiment of the present invention.

[0022] Figure 5 This diagram shows a fuse unit connected to an external wiring harness in a specific embodiment of the present invention.

[0023] Figure 6 A schematic diagram of the acquisition component in a specific embodiment of the present invention is shown;

[0024] Figure 7 A cross-sectional view showing the connection between the acquisition component and the battery cell in a specific embodiment of this utility model is shown;

[0025] Figure 8 A schematic diagram of the connection between the acquisition component and the battery cell is shown in a specific embodiment of this utility model.

[0026] The above figures include the following reference numerals:

[0027] 10. Connecting piece; 11. First welding section; 12. Second welding section; 121. Stop edge; 13. Support section; 20. Fuse unit; 21. Insulating sheet; 211. First surface; 212. Second surface; 213. Connecting hole; 214. Notch; 22. First welding area; 23. Second welding area; 24. Fuse; 25. Fixing adhesive layer; 30. Busbar; 31. Through hole; 40. External wiring harness; 50. Battery cell; 60. Isolation plate; 61. Boss; 100. Fuse module. Detailed Implementation

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0030] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0031] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0032] To address the high cost of data acquisition components in existing battery packs, this invention provides a data acquisition component and a battery pack. The battery pack includes the data acquisition component described below.

[0033] like Figures 1 to 8As shown, the acquisition component includes a fuse module 100 and a busbar 30. The fuse module 100 is disposed on the busbar 30, and at least a portion of the fuse module 100 extends horizontally out of the busbar 30. The fuse module 100 includes a connecting piece 10 and a fuse unit 20. The connecting piece 10 includes a first soldered section 11 and a second soldered section 12 connected in sequence. The busbar 30 has a through hole 31. The first soldered section 11 is accommodated in the through hole 31. The second soldered section 12 is located on the side of the busbar 30 away from the battery cell 50 and on the side of the through hole 31, and is soldered to the busbar 30. The fuse unit 20 is soldered to the second soldered section 12 and is electrically connected to the external wiring harness 40. It is understood that the connecting piece 10 is a conductive metal sheet.

[0034] The data acquisition component includes a fuse module 100 and a busbar 30. The fuse module 100 is disposed on the busbar 30, and at least a portion of the fuse module 100 extends horizontally out of the busbar 30. The fuse module includes a connecting piece 10 and a fuse unit 20. The connecting piece 10 includes a first welded section 11 and a second welded section 12 connected sequentially. The busbar 30 has a through hole 31. The first welded section 11 is accommodated in the through hole 31, and the second welded section 12 is located on one side of the through hole 31 and welded to the busbar 30. The fuse unit 20 is welded to the second welded section 12. It is electrically connected to the external wiring harness 40. By creating a through hole 31 in the busbar 30, the first welding section 11 is housed within the through hole 31, and the fuse unit 20 is welded to the second welding section 12. This allows the fuse unit 20 to be fixed to the busbar 30 via the connecting piece 10, and the external wiring harness 40 to be electrically connected to the fuse unit 20. This integrates the fuse unit 20 into the wiring harness, overcoming the limitation that the wiring harness cannot quickly disconnect the circuit in the event of a battery pack short circuit. This significantly reduces the manufacturing cost of the data acquisition components while ensuring the safety of the battery pack. Furthermore, by configuring the fuse module 100 so that at least a portion extends horizontally out of the busbar 30, this portion can be supported by the structure on the isolation plate 60, thereby enhancing the structural strength of the fuse module 100 and facilitating the connection between the external wiring harness 40 and the fuse module 100.

[0035] Specifically, in this embodiment, the connecting piece 10 is generally shaped like a spoon. The first welding section 11 is U-shaped and fixed to the busbar 30 at the through hole 31. The second welding section 12 extends horizontally outward to connect with the external wiring harness 40. The busbar 30 has a certain thickness, and the height of the first welding section 11 is less than the thickness of the busbar 30 so that the first welding section 11 will not protrude from the other side of the busbar 30, thus avoiding affecting the connection between the busbar 30 and the battery cell 50.

[0036] In this embodiment, as Figure 8As shown, there can be two through holes 31, which are located at the two ends of the busbar 30 corresponding to two adjacent cells 50. The fuse module 100 can be selectively located at one of the through holes 31.

[0037] In an optional embodiment, the busbar 30 has a groove instead of a through hole 31, and the first welding segment 11 is accommodated in the groove. That is, the accommodating structure of the first welding segment 11 may or may not penetrate the busbar 30, as long as sufficient accommodating space is provided for the first welding segment 11. Furthermore, the lower side of the first welding segment 11 may be spaced apart from or attached to the bottom surface of the groove. The second welding segment 12 is located on the side of the busbar 30 away from the battery cell 50 and on the side of the groove.

[0038] In this embodiment, the first welding segment 11 is U-shaped. Both sides of the first welding segment 11 have draft structures to allow for an interference fit between the first welding segment 11 and the through hole 31. Specifically, the two side walls of the first welding segment 11 gradually expand outwards from top to bottom to form the draft structure; that is, the first welding segment 11 is a flared U-shape. By providing the draft structure, the fuse module 100 can be pre-fixed to the through hole 31 through an interference fit. Of course, the shape of the first welding segment 11 in this embodiment is not limited to a U-shape; any structure resembling a protrusion accommodated within the through hole 31 is acceptable.

[0039] In an optional embodiment, the first welding segment 11 has a draft structure on the side away from the second welding segment 12. That is, in this embodiment, the connecting piece 10 only needs one draft structure to achieve the connection and fixation between the connecting piece 10 and the busbar 30, thereby reducing the amount of metal sheet raw materials used and reducing manufacturing costs.

[0040] like Figures 3 to 5 As shown, the fuse unit 20 includes an insulating sheet 21 and a fuse 24. A first welding area 22 and a second welding area 23 are respectively provided on both sides of the insulating sheet 21. The first welding area 22 is electrically connected to the external wiring harness 40, and the second welding area 23 is welded to the second welding segment 12. The fuse 24 is electrically connected to both the first welding area 22 and the second welding area 23.

[0041] like Figure 3As shown, 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 is 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. To avoid direct contact between the first welding area 22 and the fuse 24 and 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, thereby isolating 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, thereby achieving electrical connection with the connecting piece 10, and subsequently with the busbar 30.

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

[0043] like Figure 3 As shown, the insulating sheet 21 has a connection hole 213. The connection hole 213 is located in the overlapping area of ​​the fuse 24 and the second welding area 23. A conductive structure is provided at the connection hole 213 to allow the fuse 24 to be electrically connected to the second welding area 23 through the connection hole 213. Specifically, the conductive structure can be a metal plating layer disposed on the surface of the connection hole 213, extending to the first surface 211 and the second surface 212 of the insulating sheet 21. 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 can also be a structure such as a metal pillar fixed in the connection hole 213, which can be selected according to actual needs.

[0044] like Figures 3 to 4 As shown, the insulating sheet 21 has a notch 214 located on the side of the insulating sheet 21 away from the first welding section 11. The fuse unit 20 also includes a fixing adhesive layer 25, which is housed within the notch 214 and used to fix the external wiring harness 40. Specifically, the external wiring harness 40 includes a metal core wire and an insulating layer. The insulating layer at the end of the external wiring harness 40 is removed to expose the metal core wire, which is welded to the first welding area 22. The insulating layer located at the notch 214 is fixed to the insulating sheet 21 by the fixing adhesive layer 25, thereby protecting the weld and preventing weld damage caused by vibration.

[0045] like Figures 1 to 2As shown, in this embodiment, the fuse unit 20 is located at the end of the second welding section 12 away from the first welding section 11, and the end of the second welding section 12 away from the first welding section 11 has an upwardly bent stop edge 121 for limiting and stopping the fuse unit 20. It can be understood that in the fuse module 100, the first welding section 11 of the connecting piece 10 is a fixed part, and the second welding section 12 and a portion of the fuse unit 20 thereon extend out of the busbar 30. Therefore, placing the fuse unit 20 at the end of the second welding section 12 away from the first welding section 11 facilitates better support for the fuse unit 20.

[0046] like Figure 8 As shown, this application also provides a battery pack, including a battery cell 50 and the aforementioned acquisition component, wherein the acquisition component is electrically connected to the battery cell 50.

[0047] like Figures 7 to 8 As shown, the battery pack also includes an isolation plate 60, which is disposed between the acquisition component and the battery cell 50. The isolation plate 60 has clearance holes to allow the terminals of the battery cell 50 to pass through the isolation plate 60 and connect electrically to the busbar 30. The isolation plate 60 has a boss 61, which corresponds to the fuse module 100 and supports the portion of the fuse module 100 extending out of the busbar 30. These features provide support for the fuse module 100, thereby enhancing its structural strength and facilitating the connection between the external wiring harness 40 and the fuse module 100.

[0048] like Figure 8 As 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 via the external wiring harness 40, thus forming a sampling circuit. The sampling circuit collects the voltage of the battery cell 50 through the connecting piece 10, and then transmits it sequentially through the fuse unit 20 and the external wiring harness 40 to the battery pipeline system, thereby monitoring the status of the battery cell 50 in real time. When the current in the sampling circuit abnormally increases and heats up, the fuse 24 melts and cuts off the current, thereby 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.

[0049] From the above description, it can be seen that the above embodiments of this utility model achieve the following technical effects: By setting the assembly to include a fuse module 100 and a busbar 30, the fuse module 100 is disposed on the busbar 30, and at least a portion of the fuse module 100 extends horizontally out of 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 has a through hole 31. The first welding section 11 is accommodated in the through hole 31, and the second welding section 12 is located on one side of the through hole 31 and welded to the busbar 30. The fuse unit 20 is welded to the second welding section 12 and electrically connected to the external wiring harness 40. By creating a through hole 31 in the busbar 30, the first welding section 11 is housed within the through hole 31, and the fuse unit 20 is welded to the second welding section 12. This allows the fuse unit 20 to be fixed to the busbar 30 via the connecting piece 10, and the external wiring harness 40 to be electrically connected to the fuse unit 20. This integrates the fuse unit 20 into the wiring harness, overcoming the limitation that the wiring harness cannot quickly disconnect the circuit in the event of a battery pack short circuit. This significantly reduces the manufacturing cost of the data acquisition components while ensuring the safety of the battery pack. Furthermore, by configuring the fuse module 100 so that at least a portion extends horizontally out of the busbar 30, this portion can be supported by the structure on the isolation plate 60, thereby enhancing the structural strength of the fuse module 100 and facilitating the connection between the external wiring harness 40 and the fuse module 100.

[0050] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0051] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0052] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A data acquisition component, characterized in that, Includes a fuse module (100) and a busbar (30), the fuse module (100) being disposed on the busbar (30), and at least a portion of the fuse module (100) extending horizontally out of the busbar (30), the fuse module (100) comprising: The connecting piece (10) includes a first welding segment (11) and a second welding segment (12) connected in sequence. The busbar (30) has a through hole (31) or a groove. The first welding segment (11) is accommodated in the through hole (31) or the groove. The second welding segment (12) is located on the side of the busbar (30) away from the battery cell (50) and on the side of the through hole (31) or the groove, and is welded to the busbar (30). A fuse unit (20) is welded to the second welding section (12) and electrically connected to an external wiring harness (40).

2. The acquisition component according to claim 1, characterized in that, The fuse unit (20) includes: An insulating sheet (21) has a first welding area (22) and a second welding area (23) respectively on its two sides. The first welding area (22) is electrically connected to the external wire harness (40), and the second welding area (23) is welded to the second welding segment (12). A fuse (24) is electrically connected to the first welding area (22) and the second welding area (23), respectively.

3. The acquisition component according to claim 2, characterized in that, 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).

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

5. The acquisition component according to claim 2, characterized in that, The insulating sheet (21) has a notch (214) located on the side of the insulating sheet (21) away from the first welding section (11). The fuse unit (20) also includes a fixing adhesive layer (25) which is housed in the notch (214) and is used to fix the external wire harness (40).

6. The acquisition component according to claim 2, characterized in that, The fuse (24) and the first welding area (22) are an integral structure.

7. The acquisition component according to claim 1, characterized in that, The first welding segment (11) is U-shaped, and the first welding segment (11) has a draft structure on both sides or the first welding segment (11) has a draft structure on the side away from the second welding segment (12) so that the first welding segment (11) is interference-fitted with the through hole (31) or the groove.

8. The acquisition component according to claim 1, characterized in that, The fuse unit (20) is located at one end of the second welding section (12) away from the first welding section (11), and the end of the second welding section (12) away from the first welding section (11) has an upwardly bent stop edge (121) for limiting and stopping the fuse unit (20).

9. A battery pack, characterized in that, It includes a battery cell (50) and a data acquisition component according to any one of claims 1 to 8, wherein the data acquisition component is electrically connected to the battery cell (50).

10. The battery pack according to claim 9, characterized in that, The battery pack also includes an isolation plate (60), which is disposed between the acquisition component and the battery cell (50). The isolation plate (60) has a boss (61) which is correspondingly disposed with respect to the fuse module (100) and is used to support the portion of the fuse module (100) that extends out of the busbar (30).

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