Electrical assembly, battery module and battery pack

Abstract

The utility model belongs to the technical field of power batteries, and particularly relates to an electrical assembly, a battery module and a battery pack. The electrical assembly comprises an insulation isolation plate which is provided with a positioning groove; the flexible circuit boards comprise sampling sections, at least parts of the flexible circuit boards are stacked in the depth direction of the positioning groove and installed in the positioning groove, and the upper surfaces of the sampling sections of the flexible circuit boards are flush in the depth direction of the positioning groove. At least parts of the plurality of flexible circuit boards are overlapped and mounted in the positioning grooves of the insulating isolation plate, and are not easy to shake and separate from the insulating isolation plate, so that the flexible circuit boards are accurate in positioning and compact in layout, and the occupied space is reduced; on the basis, the upper surfaces of the sampling sections of the plurality of flexible circuit boards are flush in the depth direction of the positioning groove, so that the occupied space is further reduced, the sampling effectiveness is ensured, and the product performance of the electrical assembly, the battery module and the battery pack is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of power batteries, and in particular relates to an electrical component, a battery module and a battery pack. Background Art

[0002] The battery module inside the battery pack includes multiple battery cells connected in series and parallel. Increasing the number of battery cells in the same battery module can increase the energy of a single battery module. The greater the energy of the battery module, the higher the safety performance requirements. Therefore, real-time safety monitoring of the battery cell voltage and temperature is required.

[0003] At present, voltage signals are generally collected through sampling components, and the collected voltage signals of the battery cells are transmitted to the Battery Management System (BMS) for diagnosis and control. However, due to the limited width of the battery cell body, the area above the battery module for the flexible printed circuit (FPC) in the sampling component is limited. Due to the requirements of copper wire loop resistance and electrical safety, there are certain requirements for the width and spacing of the sampling lines inside the flexible circuit board. When the battery module is too narrow or too long, it is difficult to complete the sampling of the entire battery module through a single flexible circuit board. Multiple flexible circuit boards need to be overlapped to sample the battery cell voltage in different areas. Since the flexible circuit board itself has a certain thickness, the partial overlap of multiple flexible circuit boards causes some flexible circuit boards to be suspended, which makes positioning difficult and easily interferes with the sampling effect. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide an electrical component, a battery module and a battery pack to solve the problem of difficulty in installing and positioning multiple flexible circuit boards in the prior art, so as to improve the product performance of the electrical component, the battery module and the battery pack.

[0005] To achieve the above-mentioned and other related purposes, the present invention provides an electrical component, comprising:

[0006] An insulating isolation plate, wherein a positioning groove is provided on the insulating isolation plate;

[0007] Multiple flexible circuit boards, each of which includes a sampling section, at least portions of which are stacked along the depth direction of the positioning groove and installed in the positioning groove, and upper surfaces of the sampling sections of the multiple flexible circuit boards are flush in the depth direction of the positioning groove.

[0008] Optionally, the positioning groove includes a plurality of groove segments, and the plurality of groove segments are distributed along the length direction of the positioning groove and have decreasing depths. The depth of the groove segment is positively correlated with the number of stacked layers of the plurality of flexible circuit boards.

[0009] Optionally, at least part of the flexible circuit board also includes a connecting section connected to the sampling section, at least part of the connecting section is pressed down in the positioning groove, and in the length direction of the positioning groove, the length of the connecting section of the flexible circuit board located at the lower layer is greater than the length of the connecting section of the flexible circuit board located at the upper layer.

[0010] Optionally, the depth difference T1 between two adjacent groove sections is equal to the thickness T2 of the flexible circuit board.

[0011] Optionally, the connecting section includes at least one straight portion, the sampling section of the flexible circuit board located on the upper layer is fitted with the straight portion of the flexible circuit board located on the lower layer, the straight portion of the flexible circuit board located on the upper layer is fitted with the straight portion of the flexible circuit board located on the lower layer, and the straight portion of the flexible circuit board located on the bottom layer is fitted with the bottom wall of the corresponding groove section.

[0012] Optionally, the connecting section further includes a bending portion, and two adjacent straight portions are connected via the bending portion, and the sampling section and the adjacent straight portion are connected via the bending portion.

[0013] Optionally, the trough segment has an inclined wall, and the bottom walls between two adjacent trough segments are connected by the inclined wall.

[0014] Optionally, the slope of the bent portion is the same as the slope of the inclined wall, the bent portion of the flexible circuit board located on the upper layer is adhered to the bent portion of the flexible circuit board located on the lower layer, and the bent portion of the flexible circuit board located on the bottom layer is adhered to the inclined wall.

[0015] Optionally, the sampling section is connected to a sampling element for an external battery cell.

[0016] Optionally, the upper surface of the sampling section is higher than the upper surface of the insulating isolation plate.

[0017] Optionally, at least a portion of the flexible circuit board located on the upper layer is adhesively fixed to the flexible circuit board located on the lower layer, and at least a portion of the flexible circuit board located on the bottom layer is fixed to the insulating isolation plate by thermal riveting.

[0018] To achieve the above-mentioned objectives and other related objectives, the present application also provides a battery module, including the electrical components described above.

[0019] To achieve the above-mentioned objectives and other related objectives, the present application also provides a battery pack comprising the electrical components described above.

[0020] As described above, the electrical components, battery modules and battery packs of the present invention have at least the following beneficial effects: multiple flexible circuit boards are at least partially overlapped and installed in the positioning grooves of the insulating isolation plate, and are not easily shaken and separated from the insulating isolation plate, so that the flexible circuit boards are accurately positioned and compactly laid out, which is conducive to reducing the occupied space; based on this, the upper surfaces of the sampling sections of the multiple flexible circuit boards are flush in the depth direction of the positioning grooves, which is conducive to further reducing the occupied space and ensuring the effectiveness of sampling, thereby helping to improve the product performance of the electrical components, battery modules and battery packs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the electrical component of the utility model;

[0022] Figure 2 for Figure 1 Exploded diagram of electrical components;

[0023] Figure 3 for Figure 1 A top view of the electrical components;

[0024] Figure 4 for Figure 1 A partial cross-sectional view of an electrical component;

[0025] Figure 5 for Figure 1 Top view of the insulating isolation board.

[0026] Part Number Description

[0027] Insulating isolation plate 1, positioning groove 11, groove section 111, inclined wall 112, bottom wall 113, flexible circuit board 2, sampling section 21, output section 22, bending portion 23, straight portion 24, sampling element 3, bar 4, connector 5. DETAILED DESCRIPTION

[0028] The following describes the implementation of the present invention through specific embodiments. People familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0029] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for understanding and reading by those familiar with this technology, and are not used to limit the conditions for implementation of the present invention. Therefore, they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and purpose of the present invention. At the same time, terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships should also be considered as the scope of implementation of the present invention without substantially changing the technical content.

[0030] See also Figures 1 to 5 In some optional embodiments, the present application provides a battery module including an electrical component. In addition to the electrical component, the battery module may also include a plurality of stacked battery cells.

[0031] See also Figures 1 to 5 In some optional embodiments, the present application provides a battery pack including an electrical component. In addition to the electrical component, the battery pack may also include a plurality of stacked battery cells.

[0032] See also Figures 1 to 5 In some optional embodiments, the present application provides an electrical assembly comprising an insulating isolation plate 1 and multiple flexible circuit boards 2. In addition to the aforementioned components, the electrical assembly may also include a battery management system having a connector 5. The insulating isolation plate 1 is provided with a positioning groove 11. At least portions of the multiple flexible circuit boards 2 are stacked and mounted in the positioning groove 11 along the depth direction of the positioning groove 11. The flexible circuit boards 2 include a sampling section 21 and an output section 22. The sampling section 21 is configured to connect to the tab 4 on a battery cell to collect the cell's voltage signal, while the output section 22 is configured to connect to the connector 5 to transmit the collected voltage signal to the battery management system. The upper surfaces of the sampling sections 21 of the multiple flexible circuit boards 2 are flush with the depth direction of the positioning groove 11. The sampling sections 21 are connected to sampling elements 3 for externally connecting to the tab 4 of the battery cell. The sampling sections 21 of the multiple flexible circuit boards 2 are on the same horizontal plane, which helps ensure that the sampling elements 3 are accurately positioned and not tilted, thereby facilitating effective sampling. In the present application, the depth direction of the positioning groove 11, the thickness direction of the insulating isolation plate 1, the thickness direction of the sampling section 21 and the height direction of the battery cell are the same, ie, the Z direction in the accompanying drawings.

[0033] Optionally, the positioning groove 11 includes multiple groove sections 111, and the multiple groove sections 111 are distributed along the length direction of the positioning groove 11 and the depth decreases successively. The depth of the groove section 111 is positively correlated with the number of stacked flexible circuit boards 2. That is, the deeper the depth of the groove section 111, the greater the number of stacked flexible circuit boards 2 corresponding to the groove section 111, so that the groove section 111 has sufficient depth to accommodate multiple stacked flexible circuit boards 2.

[0034] Optionally, at least part of the flexible circuit board 2 further includes a connecting section connected to the sampling section 21, at least part of the connecting section is pressed down into the positioning groove 11, and in the length direction of the positioning groove 11, the length of the connecting section of the flexible circuit board 2 located at the lower layer is greater than the length of the connecting section of the flexible circuit board 2 located at the upper layer. In other words, the connecting section of the flexible circuit board 2 located at the lower layer extends along the length direction of the positioning groove 11 and exceeds the connecting section of the flexible circuit board 2 located at the upper layer, so that at least part of the flexible circuit board 2 located at the upper layer can be stacked on the flexible circuit board 2 located at the lower layer. In the present application, the length direction of the positioning groove 11, the length direction of the insulating isolation plate 1, the extension direction of the sampling section of the flexible circuit board 2, and the stacking direction of multiple battery cells are the same, that is, the X direction in the accompanying drawings.

[0035] Optionally, the insulating isolation board 1 includes a blister board.

[0036] Optional, see Figure 4 The depth difference T1 between two adjacent slot segments 111 is equal to the thickness T2 of the flexible circuit board 2. Furthermore, the slot segments 111 have a bottom wall 113 and an inclined wall 112. The depth difference T1 between two adjacent slot segments 111 is the height difference between the bottom walls 113 of the two adjacent slot segments 111. The bottom walls 113 between two adjacent slot segments 111 are connected by the inclined wall 112, which facilitates a smooth transition between the bottom walls 113 of adjacent slot segments 111. Here, 0.4 mm ≤ T1 ≤ 0.8 mm; specifically, T1 can be any value such as 0.4 mm, 0.6 mm, 0.7 mm, or 0.8 mm.

[0037] Optionally, the upper surface of the sampling section 21 is higher than the upper surface of the insulating isolation plate 1, which facilitates the connection operation between the sampling element 3 and the sampling section 21, helps to reduce the difficulty of connection assembly, and helps to improve the reliability of the sampling element 3 connecting the sampling section 21 and the bar 4. Furthermore, the sampling element 3 can be a nickel sheet, and a plurality of nickel sheets are arranged on both sides of the sampling section 21 distributed along the width direction of the positioning groove 11. The multiple nickel sheets located on the same side of the sampling section 21 are arranged along the stacking direction of the multiple battery cells, and the two ends of the nickel sheet are respectively welded and fixed to the bar 4 and the sampling section 21. In the present application, the width direction of the positioning groove 11, the width direction of the sampling section 21 and the length direction of the battery cell are the same, that is, the Y direction in the accompanying drawings.

[0038] Optionally, at least a portion of the upper flexible circuit board 2 is bonded to the lower flexible circuit board 2 using double-sided tape, while at least a portion of the bottom flexible circuit board 2 is thermally riveted to the insulating isolation board 1. Furthermore, the sampling section 21 of the bottom flexible circuit board 2 can be thermally riveted to the insulating isolation board 1. This structural design allows multiple flexible circuit boards 2 to be connected together, and then connected and fixed to the insulating isolation board 1 via the bottom flexible circuit board 2, allowing multiple flexible circuit boards 2 to be fixed to the insulating isolation board 1, thereby improving the stability of the overall structure.

[0039] In the electrical component of the above embodiment, at least part of the multiple flexible circuit boards 2 are stacked, which is conducive to solving the problem of limited installation space, especially when the width of the battery module (the width direction of the battery module is the same as the length direction of the battery cell) is limited and the routing area of ​​the flexible circuit board 2 is limited, multiple flexible circuit boards 2 can also be arranged, thereby expanding the sampling area of ​​the flexible circuit board 2, and the overall thickness of the overlapping sampling part is increased, so that the impact resistance of the overall structure is stronger, which is conducive to buffering the force of the sampling element 3; in addition, part of the multiple flexible circuit boards 2 are overlapped and placed in the positioning groove 11, which reduces the difficulty of installing and positioning the flexible circuit boards 2 and improves the positioning accuracy, which is conducive to ensuring the sampling effect of the sampling element 3, thereby improving the product performance of the electrical component.

[0040] See also Figures 1 to 5 In some optional embodiments, the connecting section includes at least one straight portion 24. The sampling section 21 of the upper flexible circuit board 2 is bonded to the straight portion 24 of the lower flexible circuit board 2 and secured thereto via double-sided tape. The straight portion 24 of the upper flexible circuit board 2 is bonded to the straight portion 24 of the lower flexible circuit board 2 and secured thereto via double-sided tape. The straight portion 24 of the bottom flexible circuit board 2 is bonded to the bottom wall 113 of the corresponding slot section 111 and secured thereto via adhesive bonding or hot riveting. If there are multiple straight portions 24, the plurality of straight portions 24 are distributed along the length of the positioning slot 11.

[0041] Optionally, the connecting section further includes a bend 23, two adjacent straight sections 24 are connected by the bend 23, and the sampling section 21 is connected to the adjacent straight section 24 by the bend 23. Furthermore, the slope of the bend 23 is the same as the slope of the inclined wall 112. The bend 23 of the flexible circuit board 2 located on the upper layer is adhered to and bonded to the bend 23 of the flexible circuit board 2 located on the lower layer, and the bend 23 of the flexible circuit board 2 located on the bottom layer is adhered to and bonded to the inclined wall 112 of the groove section 111. The bend 23 facilitates a smooth transition between the straight sections 24 and between the straight section 24 and the sampling section 21, thereby preventing damage to the flexible circuit board 2 due to transitional bending.

[0042] In the electrical component of the above embodiment, the flexible circuit board 2 located on the upper layer is partially adhered and fixed to the flexible circuit board 2 located on the lower layer, and the flexible circuit board 2 located on the bottom layer is partially adhered and fixed to the insulating isolation board 1, so that multiple flexible circuit boards 2 can be stably positioned and installed on the insulating isolation board 1, reducing the risk of the flexible circuit board 2 moving along the Z direction and detaching from the insulating isolation board 1, which is conducive to ensuring the flatness and structural stability of the flexible circuit board 2, protecting the sampling element 3, and thus improving the flatness, consistency and reliability of the overall structure of the electrical component.

[0043] In the electrical components, battery modules, and battery packs of the present invention, multiple flexible circuit boards 2 are partially stacked and placed in the positioning grooves 11 of the insulating isolation plate 1 for installation and positioning. This not only makes positioning simple and convenient, saving installation space, but also helps reduce the risk of the flexible circuit boards 2 moving on the insulating isolation plate 1 and affecting the sampling effectiveness of the sampling element 3, thereby improving the stability and reliability of the overall structure of the electrical components, battery modules, and battery packs.

[0044] Throughout this specification, references to terms such as "this embodiment," "example," and "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0045] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. An electrical component, characterized in that include: An insulating isolation plate, wherein a positioning groove is provided on the insulating isolation plate; Multiple flexible circuit boards, each of which includes a sampling section, at least portions of which are stacked along the depth direction of the positioning groove and installed in the positioning groove, and upper surfaces of the sampling sections of the multiple flexible circuit boards are flush in the depth direction of the positioning groove.

2. The electrical component according to claim 1, wherein The positioning groove includes a plurality of groove sections, which are distributed along the length direction of the positioning groove and have depths that decrease successively. The depths of the groove sections are positively correlated with the number of stacked flexible circuit boards.

3. The electrical component according to claim 2, wherein: At least part of the flexible circuit board also includes a connecting section connected to the sampling section, at least part of the connecting section is pressed down in the positioning groove, and in the length direction of the positioning groove, the length of the connecting section of the flexible circuit board located at the lower layer is greater than the length of the connecting section of the flexible circuit board located at the upper layer.

4. The electrical component according to claim 2, wherein: The depth difference T1 between two adjacent groove sections is equal to the thickness T2 of the flexible circuit board.

5. The electrical component according to claim 3, wherein: The connecting section includes at least one straight portion, the sampling section of the flexible circuit board located on the upper layer is bonded to the straight portion of the flexible circuit board located on the lower layer, the straight portion of the flexible circuit board located on the upper layer is bonded to the straight portion of the flexible circuit board located on the lower layer, and the straight portion of the flexible circuit board located on the bottom layer is bonded to the bottom wall of the corresponding groove section.

6. The electrical component according to claim 5, characterized in that The connecting section further includes a bending portion, and two adjacent straight portions are connected by the bending portion. The sampling section and the adjacent straight portion are connected by the bending portion.

7. The electrical component according to claim 6, characterized in that The trough section has an inclined wall, and the bottom walls between two adjacent trough sections are connected by the inclined wall.

8. The electrical component according to claim 7, wherein: The inclination of the bent portion is the same as that of the inclined wall. The bent portion of the flexible circuit board on the upper layer is in contact with the bent portion of the flexible circuit board on the lower layer, and the bent portion of the flexible circuit board on the bottom layer is in contact with the inclined wall.

9. The electrical component according to claim 2, wherein: The sampling section is connected to a sampling element for an external battery cell.

10. The electrical component according to claim 9, characterized in that The upper surface of the sampling section is higher than the upper surface of the insulating isolation plate.

11. The electrical component according to any one of claims 1 to 10, characterized in that At least a portion of the flexible circuit board located on the upper layer is bonded and fixed to the flexible circuit board located on the lower layer, and at least a portion of the flexible circuit board located on the bottom layer is fixed to the insulating isolation plate by heat riveting.

12. A battery module, characterized in that: The electrical assembly comprises the electrical assembly according to any one of claims 1 to 11.

13. A battery pack, characterized in that: The electrical assembly comprises the electrical assembly according to any one of claims 1 to 11.

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