Battery module and electronic device

Abstract

The utility model discloses an embodiment relates to battery technology field, especially disclose a kind of battery module and electronic equipment, battery module includes electric core subassembly, circuit board and shielding plate;Circuit board is arranged with the electric core subassembly up and down interval, the circuit board includes the low voltage area and high voltage area of spatial isolation, the voltage signal of the low voltage area is lower than the high voltage area;Shielding plate is set between the circuit board and the electric core subassembly, the surface of the shielding plate is extended and set with ground piece, away from the electric core subassembly, and the ground piece is connected to circuit board. By the above-mentioned mode, the utility model embodiment can inhibit electromagnetic interference and reduce the possibility of high-low voltage signal mutual interference, to improve equipment safety stability.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery module and an electronic device. Background Technology

[0002] Energy storage devices consist of battery cells and circuit boards connected to them. The safety and stability of these circuits directly affect the performance of the energy storage device. Circuit safety and stability are affected by interference from electromagnetic signals. For example, during charging and discharging, especially with high current and transient charging and discharging, the current in the battery cells changes drastically, generating a strong transient electromagnetic field. This transient electromagnetic field can interfere with the circuit board. Furthermore, the circuitry of energy storage devices involves high-voltage and low-voltage signals of varying values; when these signals interfere with each other, it can also affect the device's performance. Utility Model Content

[0003] This utility model provides a battery module and electronic device that can suppress electromagnetic interference and reduce the possibility of mutual interference between high and low voltage signals, thereby improving the safety and stability of the device.

[0004] To solve the above-mentioned technical problems, the present invention provides a battery module, which includes a battery cell assembly, a circuit board, and a shielding plate. The circuit board is arranged vertically and vertically with respect to the battery cell assembly. The circuit board includes a spatially isolated low-voltage area and a high-voltage area, and the voltage signal of the low-voltage area is lower than that of the high-voltage area. The shielding plate is disposed between the circuit board and the battery cell assembly, and a grounding element is provided on the surface of the shielding plate away from the battery cell assembly. The grounding element is connected to the circuit board.

[0005] Optionally, the grounding component includes an extension and a grounding portion connected together. The extension extends from the shielding plate in a direction toward the circuit board, and the grounding portion is disposed at one end of the extension near the circuit board. The extension and the grounding portion are arranged perpendicularly, and the grounding portion abuts against the circuit board to make the shielding plate and the circuit board electrically connected.

[0006] Optionally, there may be multiple grounding components, with some grounding components connected to the low-voltage area of ​​the circuit board and others connected to the high-voltage area of ​​the circuit board.

[0007] Optionally, the battery module also includes a bracket, with the battery cell assembly and circuit board respectively disposed on opposite sides of the bracket, and a shielding plate disposed between the bracket and the circuit board; a third support structure is provided on the side of the bracket facing the circuit board, the third support structure has a third screw hole, a third through hole is provided in the grounding part, and a third through hole is provided in the circuit board; the battery module also includes a third screw connector, which passes through the third through hole and the third through hole in sequence and is screwed into the third screw hole.

[0008] Optionally, the battery module also includes a bracket, with the cell assembly and circuit board respectively disposed on opposite sides of the bracket, and a shielding plate disposed between the bracket and the circuit board; the bracket has a buckle on the side facing the circuit board, the buckle including a connected buckle arm and a buckle engagement part, the shielding plate has a buckle hole, the buckle arm passes through the buckle hole, and the buckle engagement part engages with the surface of the shielding plate away from the cell assembly.

[0009] Optionally, the circuit board includes a board body, a battery management circuit, and an inverter circuit. Both the battery management circuit and the inverter circuit are disposed on the board body. The battery management circuit is disposed in the low-voltage area, and the inverter circuit is disposed in the high-voltage area. The battery management circuit is electrically connected to the cell assembly, and the inverter circuit is electrically connected to the battery management circuit.

[0010] Optionally, the battery module also includes a bracket, with the cell assembly and circuit board respectively disposed on opposite sides of the bracket. An insulating sheet extends from the side of the bracket away from the cell assembly. The circuit board has an isolation hole in the low-voltage area. The circuit board also includes a first DC output section and a second DC output section with opposite polarities. The first DC output section and the second DC output section are spaced apart in the low-voltage area of ​​the board. The first DC output section and the second DC output section are electrically connected to the battery management circuit respectively. The first DC output section and the second DC output section are located on opposite sides of the isolation hole. The insulating sheet is inserted into the isolation hole and placed between the first DC output section and the second DC output section.

[0011] Optionally, the battery module also includes a heat dissipation component, which is located on the side of the circuit board away from the cell assembly. The heat dissipation component includes a cooling fan for removing air from the surface of the circuit board.

[0012] Optionally, the heat dissipation assembly also includes a shroud, which, together with the circuit board, defines a heat dissipation space, an inlet, and an outlet. The inlet and outlet are connected to the heat dissipation space, and a cooling fan is located at the outlet.

[0013] To solve the above-mentioned technical problems, another technical solution adopted by this utility model is to provide an electronic device, which includes a battery module as described in any of the above embodiments.

[0014] The beneficial effects of this utility model embodiment are as follows: Unlike existing technologies, this utility model embodiment provides a battery module, including a cell assembly, a circuit board, and a shielding plate. The circuit board is vertically spaced from the cell assembly, and includes a spatially isolated low-voltage area and a high-voltage area, with the voltage signal in the low-voltage area being lower than that in the high-voltage area. The shielding plate is disposed between the circuit board and the cell assembly, and a grounding element extends from the surface of the shielding plate away from the cell assembly, connected to the circuit board. Through the shielding plate, electromagnetic interference between the cell assembly and the circuit board is reduced. Furthermore, the partitioned isolation of the low-voltage and high-voltage areas reduces the risk of mutual interference between high-voltage and low-voltage signals, thereby improving the safety and stability of the battery module. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0016] Figure 1 This is a perspective view of the battery module according to an embodiment of the present utility model; Figure 2 This is an exploded view of the battery module according to an embodiment of the present invention; Figure 3 This is a top view of the battery module according to an embodiment of the present invention; Figure 4 This is an embodiment of the present utility model. Figure 3 AA section view in the middle; Figure 5 This is an embodiment of the present utility model. Figure 4 Enlarged view of part A in the image; Figure 6 This is a schematic diagram of the circuit board structure according to an embodiment of the present invention; Figure 7 This is an exploded view of the battery cell assembly and support according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the second surface of the bracket according to an embodiment of the present invention; Figure 9 This is a bottom view of the battery module according to an embodiment of the present invention; Figure 10 This is an embodiment of the present utility model. Figure 9 BB section view in the middle; Figure 11 This is a perspective view of the series busbar according to an embodiment of the present utility model; Figure 12This is a perspective view of the motor busbar according to an embodiment of the present utility model; Figure 13 This is a schematic diagram of the installation of the conductive component according to an embodiment of the present utility model; Figure 14 This is a schematic diagram of the first surface of the bracket according to an embodiment of the present utility model; Figure 15 This is an embodiment of the present utility model. Figure 14 Enlarged view of part B in the image; Figure 16 This is a schematic diagram of the installation of the contact piece according to an embodiment of the present utility model; Figure 17 This is a perspective view of the shielding plate according to an embodiment of the present utility model; Figure 18 This is a schematic diagram of the circuit board installation according to an embodiment of the present utility model; Figure 19 This is an embodiment of the present utility model. Figure 18 Enlarged view of section C in the image; Figure 20 This is a perspective view of the circuit board according to an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. Battery module; 10. Battery cell assembly; 11. Battery cell; 111. Positive electrode section; 112. Negative electrode section; 20. Circuit board; 21. Board body; 211. Isolation hole; 212. First through hole; 213. Second through hole; 214. Third through hole; 215. Fourth through hole; 216. Fifth through hole; 22. Battery management circuit; 221. Sampling unit; 222. Positive terminal unit; 223. Negative terminal unit; 224. First grounding unit; 23. Inverter circuit; 231. Second grounding unit; 233. AC input unit; 234. AC output unit; 24. Boundary line; 25. Contact piece; 26. First DC output section; 27. Second DC output section; 28. AC input interface; 30. Bracket; 31. Frame; 311. First surface; 312. Second surface; 313. First mounting groove; 3131. First locking part; 314. Second mounting groove; 3141. Second locking part; 315. Receiving groove; 316. Second hollow structure; 32. First support structure; 321. First support column; 3211. First screw hole; 322. First platform part; 323. First reinforcing rib; 324. First surrounding structure; 33. Second support structure; 331. Second platform part; 3311. Second screw hole; 332. Second surrounding structure; 34. Third support structure; 341. Second support Column; 3411, Third screw hole; 342, Base; 3421, First abutment surface; 343, Second reinforcing rib; 35, Buckle; 351, Clip arm; 352, Snap-fit ​​part; 3521, First guide surface; 3522, Second guide surface; 36, Insulating sheet; 361, Boss part; 37, Positioning seat; 371, First step part; 372, Second step part; 3721, Fourth screw hole; 38, Elastic element; 381, First limiting surface; 382, ​​Second limiting surface; 383, First hollow structure; 39, Third support column; 391, Fifth screw hole; 310, Mounting seat; 3101, Sixth through hole; 40. Series busbar; 41. Series arm; 411. First welded part; 412. Second welded part; 42. Sampling arm; 421. First horizontal part; 4211. First through hole; 422. First vertical part; 4221. First slot; 50. Electrode busbar; 51. Third welding part; 52. Connecting arm; 521. Second horizontal part; 5211. Second through hole; 522. Second vertical part; 5221. Second slot; 60. Shielding plate; 601. Clip hole; 602. Positioning hole; 603. Clearance groove; 61. Grounding component; 611. Extension; 612. Grounding part; 6121. Third through hole; 70. Heat dissipation component; 71. Cooling fan; 711. Sixth screw hole; 72. Airflow guide; 721. Fourth through hole; 80. First screw connector; 81. Second screw connector; 82. Third screw connector; 83. Fourth screw connector; 84. Fifth screw connector; 85. Sixth screw connector. Detailed Implementation

[0018] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this specification are for illustrative purposes only.

[0019] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0020] Please see Figure 1 The battery module 1 includes a cell assembly 10, a circuit board 20, a bracket 30, and a conductive component. The circuit board 20 and the cell assembly 10 are respectively disposed on both sides of the bracket 30, and the circuit board 20 and the cell assembly 10 are electrically connected through the conductive component.

[0021] For ease of understanding, the directions are defined as follows: the X, Y, and Z directions are perpendicular to each other.

[0022] For the aforementioned cell assembly 10, please refer to... Figure 1 and Figure 2 The battery cell assembly 10 includes a plurality of battery cells 11. The battery cells 11 are in the shape of a line. Along the length of the battery cell 11, a first electrode and a second electrode are respectively provided at both ends of the battery cell 11. The first electrode and the second electrode are opposite electrodes to each other, and one of the first electrodes is the positive electrode portion 111 and the other is the negative electrode portion 112.

[0023] For the circuit board 20 mentioned above, please refer to... Figure 3 The circuit board 20 includes a board body 21, a battery management circuit 22, and an inverter circuit 23. Both the battery management circuit 22 and the inverter circuit 23 are located on the board body 21. The battery management circuit 22 is electrically connected to the battery cell assembly 10, and the inverter circuit 23 is electrically connected to the battery management circuit 22. In this way, compared to traditional inverters and battery management systems being separate components, the inverter circuit 23 and battery management circuit 22 in this embodiment are integrated on the same circuit board 20, improving integration, thereby enhancing reliability and structural compactness.

[0024] In some embodiments, please combine Figure 6Along the X-axis, the board 21 is divided into independent and spatially isolated high-voltage and low-voltage zones, separated by a boundary line 24. The voltage signal in the low-voltage zone is lower than that in the high-voltage zone, less than 30V, while the voltage signal in the high-voltage zone is greater than 30V. The inverter circuit 23 is located in the high-voltage zone, and the battery management circuit 22 is located in the low-voltage zone, with the inverter circuit 23 and battery management circuit 22 spaced apart. This isolation layout reduces interference between the high-voltage and low-voltage signals, thereby improving the stability of the inverter circuit 23 and battery management circuit 22. Optionally, the circuit board 20 may include a DC-DC conversion circuit in the low-voltage zone.

[0025] For the aforementioned bracket 30, please refer to... Figure 2 and combined Figure 7 and Figure 8 The support 30 includes a frame 31, which is a plate-like structure, and the plane of the plate-like structure is perpendicular to the X direction. Along the X direction, the frame 31 has a first surface 311 and a second surface 312 arranged opposite to each other. The frame 31 has a plurality of receiving slots 315 on the second surface 312, and the depth direction of the receiving slots 315 is parallel to the X direction. Along the Y direction, the two ends of the receiving slots 315 extend to the edge of the support 30 to form a straight receiving slot 315. The receiving slots 315 are arranged in parallel along the Z direction, and the battery cells 11 are correspondingly received in the receiving slots 315, with a part of the battery cell 11 located inside the receiving slot 315 and the other part of the battery cell 11 extending out of the receiving slot 315. The arrangement of the receiving slots 315 and the battery cells 11 achieves two advantages: firstly, the battery cells 11 are neatly arranged, making full use of the space on the side of the second surface 312 of the frame 31, resulting in a compact structure; secondly, the positive electrode 111 and negative electrode 112 of each battery cell 11 are located at the edges of both ends of the frame 31 along the Y direction, facilitating electrical connection between each battery cell 11 and the circuit board 20 assembly. As an example, the battery cell 11 is cylindrical, and the receiving slot 315 of the frame 31 is an arc-shaped slot matching the cylindrical battery cell 11. Optionally, the bracket 30 can be integrally molded, and the material of the bracket 30 can be plastic, giving the bracket 30 good elasticity and insulation, and light weight. It should be noted that at one end of the battery cell assembly 10 along the second direction Z, the positive electrode 111 and negative electrode 112 are arranged alternately along the Z direction, facilitating series connection of the battery cell assembly 10.

[0026] In some embodiments, the bracket 30 is provided with a plurality of limiting components on the second surface 312. The plurality of limiting components are arranged sequentially at intervals along the Z direction. A limiting component is provided at the connection between two adjacent receiving slots 315. The two adjacent limiting components are used to limit a battery cell 11 within a receiving slot 315. The battery cell 11 is fixed by the setting of the limiting components.

[0027] Furthermore, the limiting component is an elastic element 38, with two adjacent elastic elements 38 spaced apart along the Z direction. The battery cell 11 is held in the receiving groove 315 by the elastic elements 38 on both sides, thereby preventing the battery cell 11 from detaching from the receiving groove 315. By applying an external force to the elastic elements 38, the elastic elements 38 on both sides of the receiving groove 315 move away from each other along the Z direction, thereby allowing the battery cell 11 to be placed into or detached from the receiving groove 315; when the external force is removed, the elastic elements 38 on both sides of the receiving groove 315 move closer to each other along the Z direction, so that the battery cell 11 cannot detach from the receiving groove 315 between the two elastic elements 38 on both sides of the receiving groove 315.

[0028] Optional, please refer to Figure 9 and Figure 10 The elastic element 38 includes two elastic portions arranged opposite each other along the Z-direction. Each elastic portion of the same limiting component has a first limiting surface 381 and a second limiting surface 382, ​​which are curved surfaces bent in opposite directions and respectively match the outer contour of the battery cell. In two adjacent limiting components, the elastic portion of one limiting component with the first limiting surface 381 and the elastic portion of the other limiting component with the second limiting surface 382 cooperate to confine a battery cell 11 within a receiving groove 315. Between two adjacent receiving grooves 315, one limiting component is used to confine the battery cell 11 within each groove, reducing the distance between the two receiving grooves 315 and, while meeting strength requirements, reducing the overall volume of the two elastic elements 38, thus making the structure compact.

[0029] Optionally, the elastic element 38 is provided with a first hollow structure 383, which penetrates the elastic portion along the Z direction, thereby making the elastic portion more prone to elastic deformation, making the assembly of the battery cell 11 easier and reducing the difficulty of operation. Furthermore, the first hollow structure 383 saves material and reduces weight. This utility model does not limit the arrangement of the first hollow structure 383; one or more first hollow structures 383 may be provided.

[0030] Optionally, the frame 31 is provided with a second hollow structure 316, which extends through the frame 31 in the X direction. The battery cell assembly 10 generates heat during operation. The second hollow structure 316 facilitates the transfer of heat generated by the battery cell 11 to the first surface 311 of the frame 31, thereby achieving heat dissipation of the battery cell 11.

[0031] It should be noted that the battery cell assembly 10 can also dissipate heat on the second surface 312 of the bracket 30. Along the X direction, a portion of the battery cell 11 is housed in the receiving groove 315, while the other portion of the battery cell 11 is exposed within the receiving groove 315, allowing direct contact with the outside air for heat dissipation. The elastic members 38 on both sides of the receiving groove 315 are spaced apart, thereby increasing the area of ​​direct contact between the battery cell and the outside air, improving heat transfer efficiency, and enhancing heat dissipation capacity. Furthermore, the first hollow structure 383 further expands the heat dissipation area of ​​the battery cell 11. Moreover, along the Y direction, the length of the elastic member 38 is less than the length of the receiving groove 315, which saves material and allows more of the battery cell 11 to be exposed to the air, thus enhancing heat dissipation.

[0032] For the conductive components mentioned above, please refer to... Figure 2 , Figure 4 and Figure 5 and combined Figure 11 and Figure 12 The conductive components include a series busbar 40, which is a sheet-like structure and is disposed on the edge of the support 30. The series busbar 40 includes a series arm 41 and a sampling arm 42 connected sequentially along the X direction. Along the X direction, the end of the sampling arm 42 opposite to the series arm 41 is located on the first surface 311 of the support 30. The battery management circuit 22 has a sampling unit 221 for voltage sampling. This arrangement facilitates the contact between the sampling unit 221 of the circuit board 20 and the sampling arm 42, thereby achieving electrical connection between the sampling unit 221 and the sampling arm 42. At least a portion of the series arm 41 is located on the side of the second surface 312 of the support 31, thereby facilitating the connection between the series arm 41 and the cell assembly 10. The two ends of the series arm 41 along the Z direction are respectively connected to two adjacent cells 11, so that multiple cells 11 form a cell group connected in series through multiple series busbars 40. With the above arrangement, the positive electrode 111 and negative electrode 112 of each battery cell 11, as well as the series busbar 40, are all located at the edge of the frame 31, which facilitates the connection between the series arm 41 and the battery cell 11. Compared with the complex cable layout, the layout of the series busbar 40 in this embodiment of the invention is simple, saving space and simplifying the assembly operation by reducing the number of cables. Furthermore, the conductive path of the series busbar 40 is short, reducing energy loss. It can be understood that there are multiple series busbars 40, and any two adjacent battery cells 11 are connected through a series busbar 40. There are multiple sampling units 221, and a sampling arm 42 is connected to a sampling unit 221.

[0033] In some embodiments, the conductive component further includes two electrode busbars 50, which are sheet-like structures disposed at the edge of the support 30. Along the X direction, one end of the electrode busbar 50 is located on the side of the second surface 312 of the frame 31, and the other end is located on the first surface 311 of the frame 31. The battery management unit includes a positive electrode unit 222 and a negative electrode unit 223. One end of the two electrode busbars 50 is connected to the total positive and total negative electrodes of the cell assembly, respectively, and the other ends of the two electrode busbars 50 are respectively used to connect to the positive electrode unit 222 and the negative electrode unit 223 of the battery management circuit 22 on the circuit board 20. The function of the series busbar 40 is similar to that of the series busbar 40 and will not be described in detail here.

[0034] It should be noted that, please refer to Figure 13 The overall positive terminal of the cell group refers to the positive terminal 111 of one cell 11, and the overall negative terminal refers to the negative terminal 112 of another cell 11. The cells 11 are connected in series from the overall positive terminal to the overall negative terminal. The two ends of the series arm 41 are respectively connected to two adjacent cells 11, meaning that along the series connection direction of the cell group, the two ends of the series arm 41 are respectively connected to the positive terminal 111 of one of two adjacent cells 11 and the negative terminal 112 of the other.

[0035] For the aforementioned series busbar 40, please refer to... Figure 14 and combined Figure 5 and Figure 6 The series arm 41 of the series busbar 40 includes a first welding portion 411 and a second welding portion 412, which are welded to two adjacent battery cells 11 respectively. The sampling arm 42 includes a first vertical portion 422 and a first horizontal portion 421 connected to each other. The first vertical portion 422 extends along the X direction, and the first vertical portion 422 and the first horizontal portion 421 are arranged perpendicularly. Along the X direction, one end of the first vertical portion 422 is connected to the series arm 41, and the other end is connected to the first horizontal portion 421. The first horizontal portion 421 abuts against the first surface 311 of the bracket 30, thereby facilitating the contact between the circuit board 20 and the first horizontal portion 421, and thus realizing the electrical connection between the circuit board 20 and the first horizontal portion 421. Optionally, the series busbar 40 is integrally formed.

[0036] Optionally, along the Y-direction, the sidewall of the edge of the frame 31 is recessed inward to form a first mounting groove 313. A first vertical portion 422 is arranged perpendicular to the Y-direction and is received within the first mounting groove 313, with both sides of the first vertical portion 422 abutting against the sidewalls of the first mounting groove 313. A first slot 4221 is provided on both sides of the first vertical portion 422, and the frame 31 has protruding first locking portions 3131 on the inner sidewalls of both sides of the first mounting groove 313. During assembly, the first locking portions 3131 are aligned with the first slots 4221 one by one, and the first vertical portion 422 is inserted into the first mounting groove 313 along the first direction until a first locking portion 3131 is inserted into a first slot 4221. The above assembly operation is simple and convenient. The first card part 3131 and the first card slot 4221 are engaged to limit the installation position of the series busbar 40 and to initially fix the series busbar 40 and the bracket 30, which facilitates the subsequent fixed connection of the series busbar 40 to the battery cell 11 and the circuit board 20 respectively.

[0037] Optionally, the bracket 30 has a first support structure 32 on its first surface 311. The first support structure 32 is located at the edge of the frame 31 and in the first mounting groove 313. Along the Y direction, a first locking portion 3131 extends from the edge of the frame 31 to the first support structure 32. A first horizontal portion 421 is supported on the side of the first support structure 32 opposite to the cell assembly 10, thus ensuring stable support of the first horizontal portion 421. The circuit board 20 is supported on the side of the first horizontal portion 421 opposite to the first support structure 32, and a sampling unit 221 abuts against the first horizontal portion 421 and is electrically connected to it. Through this arrangement, the first support structure 32 simultaneously supports the first horizontal portion 421 and the circuit board 20, ensuring stable contact between the first horizontal portion 421 and the sampling unit 221.

[0038] Optional, please refer to Figure 16 The circuit board 20 includes a contact piece 25, which is attached to the side of the sampling unit 221 facing the frame 31 and is electrically connected to the sampling unit 221. A first horizontal portion 421 is attached to the side of the contact piece 25 facing away from the sampling unit 221 and is electrically connected to the contact piece 25. The contact piece 25 reduces the risk of poor contact between the sampling unit 221 and the first horizontal portion 421.

[0039] Optionally, the battery module 1 further includes a first screw connector 80. A first screw hole 3211 is provided on the side of the first support structure 32 facing away from the cell assembly 10. A first through hole 421 is provided on the first horizontal portion 421. A first through hole 212 is provided on the circuit board 20 and the sampling unit 221. The first through hole 212 passes through the plate body 21 and the corresponding contact piece 25 in sequence. The first screw connector 80 passes through the first through hole 212 and the first through hole 4211 in sequence and is screwed into the first screw hole 3211. In this way, the series busbar 40 is fixedly connected to the cell 11 support 30, the circuit board 20 is fixedly connected to the support 30, and the sampling unit 221 is electrically connected to the series busbar 40, improving assembly efficiency and greatly increasing the integration of the battery module 1. It is understandable that the tightening of the first screw connector 80 may cause deformation of the sampling unit 221 or the first horizontal portion 421, resulting in a risk of reduced contact area between the sampling unit 221 and the first horizontal portion 421. This could lead to poor contact between the sampling unit 221 and the first parallel portion, or increased heat generation. However, the contact piece 25 in this embodiment strengthens the circuit board 20 at the sampling unit 221, reducing the aforementioned risks.

[0040] The first support structure 32 described above includes a first support column 321 and a first platform portion 322 connected together. A first horizontal portion 421 abuts against the side of the first support column 321 facing away from the cell assembly 10, and a first screw hole 3211 is provided on the side of the first support column 321 facing away from the cell assembly 10. It is understood that the current flowing through the self-sampling unit 221 is relatively small, and the width of the series busbar 40 is relatively small along the Z direction. The columnar structure of the first support column 321 is sufficient to support the first horizontal portion, thereby saving material and making the structure compact. Along the Y direction, the first platform portion 322 is provided on the side of the first mounting groove 313 facing the cell assembly 10, and the first locking portion 3131 extends to the first platform portion 322. Along the Y direction, the first vertical portion 422 is inserted into the first mounting groove 313 until the first vertical portion 422 abuts against the first platform portion 322, thereby achieving the positioning of the first vertical portion 422 along the Y direction, thus facilitating assembly. Furthermore, the side of the first platform portion 322 facing the first vertical portion 422 is a plane, and the first platform portion 322 is fitted to the first vertical portion 422, thereby improving stability.

[0041] Optionally, the bracket 30 is further provided with a first perimeter structure 324, which extends from the first surface 311 of the frame 31 along the X direction. Along the circumferential direction around the X direction, except for the side of the first platform portion 322 facing the first mounting groove 313, the first perimeter structure 324 is arranged around the first platform portion 322, and the first platform portion 322 is located inside the first perimeter structure 324. Along the X direction, the first perimeter structure 324 protrudes from the first platform portion 322, and the first horizontal portion 421 abuts against the inner wall of the first perimeter structure 324. This further ensures the positioning of the first horizontal portion 421, facilitating the installation of the series busbar 40. Along the X direction, the first horizontal portion 421 is flush with the first perimeter structure 324, or the first horizontal portion 421 protrudes from the first perimeter structure 324, thereby ensuring that the sampling unit 221 of the circuit board 20 abuts against the first horizontal portion 421, reducing the risk of poor contact. Furthermore, the first support structure 32 also includes a first reinforcing rib 323, which is connected to the first support column 321, the first platform portion 322 and the first perimeter structure 324 respectively, thereby improving the strength of the first support structure 32.

[0042] For the aforementioned electrode busbar 50, the electrode busbar 50 includes a third welding portion 51 and a connecting arm 52 connected together. In one of the two electrode busbars 50, the third welding portion 51 of one is welded to the positive terminal of the battery cell 11, and the third welding portion 51 of the other is welded to the negative terminal of the battery cell 11. The connecting arm 52 includes a second horizontal portion 521 and a second vertical portion 522 connected together. The second vertical portion 522 extends along the X direction and is perpendicular to the second horizontal portion 521. One end of the second vertical portion 522 is connected to the third welding portion 51, and the other end is connected to the second horizontal portion 521. The second horizontal portion 521 abuts against the first surface 311 of the bracket 30, thereby facilitating the connection between the circuit board 20 and the second horizontal portion 521. Optionally, the electrode busbar 50 is integrally formed.

[0043] Optionally, the frame 31 has a second mounting groove 314 on its edge, and a protruding second locking part 3141 is provided on the inner wall of the second mounting groove 314. The second vertical part 522 has a second locking groove 5221, which is received in the second mounting groove 314, and the second locking part 3141 is engaged with the second locking groove 5221. The structure and function of the second mounting groove 314 are similar to those of the first mounting groove 313, and will not be described in detail here.

[0044] Optionally, the bracket 30 has two second support structures 33 on its first surface 311. The second support structures 33 are located at the edge of the bracket 31, and a second horizontal portion 521 is supported on the side of the second support structure 33 facing away from the cell assembly 10. The circuit board 20 is supported on the side of the second horizontal portion 521 facing away from the second support structure 33. The positive electrode unit 222 and the negative electrode unit 223 respectively abut against the second horizontal portion 521, and the positive electrode unit 222 and the negative electrode unit 223 are respectively electrically connected to the second horizontal portion 521. Further, contact pieces 25 are respectively provided between the two second horizontal portions 521 and the circuit board 20.

[0045] The second support structure 33 described above includes a second platform portion 331, with a second screw hole 3311 provided on the side of the second platform portion 331 facing away from the cell assembly 10. Along the X direction, a second horizontal portion 521 is attached to the plane of the second platform portion 331 facing away from the cell assembly 10. Along the Y direction, the second platform portion 331 is located on the side of the second mounting groove 314 facing the cell assembly 10, and a second locking portion 3141 extends to the second platform portion 331. A second vertical portion 522 abuts against the plane of the second platform portion 331 facing away from the cell assembly 10. The second horizontal portion 521 has a second through hole 5211, and the circuit board 20 has second through holes 213 in the positive electrode unit 222 and the negative electrode unit 223, respectively. The second through holes 213 sequentially penetrate the board body 21 and the corresponding contact piece 25. The battery module 1 also includes a second screw connector 81, which passes through the second through hole 213 and the second through hole 5211 in sequence and is screwed into the second screw hole 3311. It is understood that the current flowing through the positive electrode unit 222 or the negative electrode unit 223 is relatively large, and the width of the electrode busbar 50 is relatively large along the Z direction. In this embodiment of the invention, the second platform portion 331 stably supports the second horizontal portion 521.

[0046] Optionally, the second support structure 33 further includes a second perimeter structure 332, which extends from the first surface 311 of the frame 31 along the X direction. Along the circumferential direction around the X direction, except for the side of the second platform portion 331 facing the second mounting groove 314, the second perimeter structure 332 is disposed around the second platform portion 331, and the second platform portion 331 is located inside the second perimeter structure 332. Along the X direction, the second perimeter structure 332 protrudes from the second platform portion 331, and the second horizontal portion 521 abuts against the inner wall of the second perimeter structure 332. This further ensures the positioning of the second horizontal portion 521, facilitating the installation of the electrode busbar 50. Along the X direction, the second horizontal portion 521 is flush with the second perimeter structure 332, or the second horizontal portion 521 protrudes from the second perimeter structure 332, thereby ensuring that the positive electrode unit 222 and the negative electrode unit 223 of the circuit board 20 abut against the two second horizontal portions 521 respectively, reducing the risk of poor contact.

[0047] In some embodiments, please combine Figure 17 The battery module 1 also includes a shielding plate 60, which is detachably mounted on the first surface 311 of the bracket 30 and positioned between the bracket 31 and the circuit board 20. The shielding plate 60 provides shielding, thereby reducing electromagnetic interference and improving electromagnetic compatibility.

[0048] Optionally, a grounding element 61 is provided on the side of the shielding plate 60 facing away from the cell assembly 10. The grounding element 61 is integrally formed with the shielding plate 60 and is used for grounding. The grounding element 61 includes an extension 611 and a grounding part 612 connected to each other. The extension 611 extends from the shielding plate 60 in a direction away from the support 30, and the grounding part 612 is located at the end of the extension 611 away from the support 30. The extension 611 and the grounding part 612 are perpendicular to each other. Further, a contact piece 25 is provided between the grounding part 612 and the circuit board 20, and the grounding part 612 and the circuit board 20 are respectively attached to the contact piece 25. There are multiple grounding elements 61. Some grounding elements 61 are connected to the low-voltage area of ​​the circuit board 20, and other grounding elements 61 are connected to the high-voltage area of ​​the circuit board 20, so that the shielding plate 60 is connected to the battery management circuit 22 and the inverter circuit 23 respectively, thereby achieving grounding. As an example, the battery management circuit 22 is provided with a first grounding unit 224, the inverter circuit 23 is provided with two second grounding units 231, and the number of grounding components 61 is three. The grounding part 612 of one grounding component 61 is connected to the first grounding unit 224, and the grounding parts 612 of the other two grounding components 61 are respectively connected to the two second grounding units 231.

[0049] Optional, please refer to Figure 18 and Figure 19 The bracket 30 has a third support structure 34 on its first surface 311, and a grounding part 612 is located on the side of the third support structure 34 away from the cell assembly 10. The side of the third support structure 34 away from the cell assembly 10 has a third screw hole 3411, and the grounding part 612 has a third through hole 6121. The circuit board 20, the first grounding unit 224, and the second grounding unit 231 each have a third through hole 214, which penetrates the plate 21 and the corresponding contact piece 25. The battery module 1 also includes a third screw connector 82, which passes through the third through hole 214 and the third through hole 6121 and is screwed into the third screw hole 3411. This allows for simultaneous fixed connections between the shielding plate 60 and the bracket 30, between the circuit board 20 and the bracket 30, and between the shielding plate 60 and the circuit board 20 by tightening the third screw connector 82, thereby improving integration.

[0050] Optionally, the third support structure 34 includes a second support column 341 and a second reinforcing rib 343. The second support column 341 is disposed on the first surface 311 of the frame 31 and extends along the X direction. A third screw hole 3411 is disposed on the side of the second support column 341 away from the frame 31, and a grounding part 612 abuts against the side of the third support column 341 away from the frame 31. The second reinforcing rib 343 is connected to the frame 31 and the second support column 341 respectively, thereby ensuring the strength of the third support structure 34.

[0051] Optionally, the third support structure 34 also includes a base 342, which is disposed on the first surface 311 of the frame 31. The base 342 is provided with a first abutment surface 3421, which is arranged parallel to the X direction. The extension 611 fits against the first abutment surface 3421, thereby realizing the positioning of the grounding member 61 and making the connection of the grounding member 61 stable.

[0052] Optional, please refer to Figure 15 The frame 31 has a buckle 35 on its first surface 311. The buckle 35 includes a connecting arm 351 and a latching part 352. The arm 351 extends from the frame 31 along the X direction, and the buckle 35 is located at the end of the arm 351 facing away from the frame 31. The shielding plate 60 has a locking hole 601, through which the arm 351 passes, and the latching part 352 latches onto the surface of the shielding plate 60 facing away from the cell assembly 10. This design reduces the risk of warping of the shielding plate 60, thereby reducing the risk of short circuits in the electronic components of the circuit board 20 facing the shielding plate 60; and during assembly, it reduces the risk of the shielding plate 60 detaching from the bracket 30, facilitating further fixing of the shielding plate 60 to the bracket 30. In some other embodiments, the locking hole 601 may not be provided. The buckle 35 may also latch onto the edge of the shielding plate 60, making it easy to assemble and disassemble the shielding plate 60 and the buckle 35. It is understandable that there can be multiple clips 35. Some clips 35 have their snap-fit ​​parts 352 snapped onto the edge of the shielding plate 60, while other clips 35 have their snap-fit ​​parts 352 snapped onto the side of the shielding plate 60 away from the frame 31 after passing through the snap hole 601.

[0053] Furthermore, the latching portion 352 is provided with a first guide surface 3521 and a second guide surface 3522 connected to each other, both of which are inclined in the X direction. The first guide surface 3521 is located at the end of the latching portion 352 near the latching arm 351, and the first guide surface 3521 causes the thickness of the latching portion 352 to gradually decrease along the direction away from the latching arm 351. The first guide surface 3521 is used to guide the latching portion 352 through the latching hole 601 from the side of the shielding plate 60 facing the frame 31. The second guide surface 3522 is located at the end of the latching portion 352 away from the latching arm 351, and the second guide surface 3522 causes the thickness of the latching portion 352 to gradually increase along the direction away from the latching arm 351. The second guide surface 3522 is used to guide the latching portion 352 through the latching hole 601 from the side of the shielding plate 60 away from the frame 31.

[0054] In some embodiments, please combine Figure 20 The circuit board 20 has an isolation hole 211, a first DC output section 26, and a second DC output section 27 in the low-voltage area. The first DC output section 26 and the second DC output section 27 have opposite polarities and are located on opposite sides of the isolation hole 211. The first DC output section 26 and the second DC output section 27 are respectively connected to the battery management circuit 22. An insulating sheet 36 extending in the X direction is provided on the first surface 311 of the frame 31. The insulating sheet 36 is inserted into the isolation hole 211 to isolate the first DC output section 26 and the second DC output section 27. This reduces the risk of misconnection of the first DC output section 26 and the second DC output section 27, for example, a screw falling between them. Furthermore, the insulating sheet 36 also serves as a positioning element during the installation of the circuit board 20, thereby improving assembly efficiency. Furthermore, along a direction parallel to the X-direction and away from the frame 31, the insulating sheet 36 protrudes from the first DC output portion 26 and the second DC output portion 27, thereby improving the isolation effect. Furthermore, along the thickness direction of the insulating sheet 36, the projections of both the first DC output portion 26 and the second DC output portion 27 are located within the projection of the insulating sheet 36. The shielding plate 60 is provided with a clearance groove 603 for avoiding the insulating plate.

[0055] Optionally, the frame 31 has a boss 361 on its first surface 311, which extends in the X direction. An insulating sheet 36 is disposed on the side of the boss 361 facing away from the frame 31. The circuit board 20 abuts against the side of the boss 361 facing away from the frame 31, thereby allowing the boss 361 to support the circuit board 20. The shielding plate 60 abuts against the side wall of the boss 361 through the inner wall of the clearance groove 603, thereby achieving positioning, which facilitates the installation of the shielding plate 60 and limits its movement.

[0056] In some embodiments, the frame 31 has a positioning seat 37 extending in the X direction on its first surface 311. Along the direction away from the frame 31, the positioning seat 37 includes a first step portion 371 and a second step portion 372 connected in sequence. A fourth screw hole 3721 is provided on the side of the second step portion 372 away from the first step portion 371. The shielding plate 60 has a positioning hole 602, through which the first step portion 371 passes and extends. The circuit board 20 abuts against the side of the second step portion 372 away from the frame 31, and the plate 21 has a fourth through hole 215. The battery module 1 also includes a fourth screw connector 83, which passes through the fourth through hole 215 and is screwed into the fourth screw hole 3721. It should be noted that the arrangement of the first support structure 32, the second support structure 33, the third support structure 34, the fourth support structure, and the boss portion 361 provides multi-point support and multi-point fixation for the circuit board 20, thereby ensuring that the circuit board 20 is securely connected to the bracket 30.

[0057] Understandably, the low-voltage zone includes a first sub-zone, a second sub-zone, and a third sub-zone connected sequentially along the Y direction. The first and third sub-zones are located at the edges of both ends of the board 21 along the Y direction, while the second sub-zone and the high-voltage zone are positioned opposite each other along the Z direction. Both the first and third sub-zones extend along the Y direction, and each sub-zone has multiple sampling units 221 arranged along the Y direction. Positive and negative units 222 are respectively located in the first and / or third sub-zones. This ensures that both ends of the circuit board 20 along the Y direction receive multi-point support and fixation along the Z direction, resulting in a stable and secure connection between the circuit board and the support.

[0058] Optionally, along the Y direction, the positioning seat 37 is located between the first sub-region and the third sub-region. Multiple positioning seats 37 are provided, and these multiple positioning seats 37 are arranged sequentially at intervals along the Z direction, thereby supporting the central region of the circuit board 20 and ensuring a uniform distribution of the supporting force on the circuit board 20.

[0059] In some embodiments, the inverter circuit 23 further includes an AC input unit 233 and an AC output unit 234, and the circuit board 20 further includes an AC input interface 28 electrically connected to the AC input unit 233. The AC input interface 28 is disposed in the high voltage area of ​​the board body 21 and is located at the edge of the board body 21 and on the side of the board body 21 away from the frame 31.

[0060] In some embodiments, the heat dissipation assembly 70 includes a cooling fan 71 and a shroud 72, the shroud 72 covering the side of the circuit board 20 facing away from the bracket 30. The shroud 72 and the circuit board 20 enclose a heat dissipation space, an inlet, and an outlet, the inlet and outlet respectively communicating with the heat dissipation space. The cooling fan 71 is disposed on the first surface 311 of the bracket 30, and the cooling fan 71 is located at the outlet. By activating the cooling fan 71, external air flows into the heat dissipation space from the inlet and then flows out of the outlet through the cooling fan 71, thereby carrying away the heat from the circuit board 20. It is understood that multiple inlets may be provided, each communicating with the heat dissipation space. Furthermore, along the Z direction, the AC input interface 28 and the cooling fan 71 are located at both ends of the frame 31, thereby making full use of the space on the side of the board 21 facing away from the frame 31.

[0061] Optionally, the frame 31 has a third support post 39 on its first surface 311, the plate 21 abuts against the third support post 39, and the third support post 39 has a fifth screw hole 391 on the side opposite to the frame 31. The air guide shroud 72 has a fourth through hole 721, the circuit board 20 has a fifth through hole 216, and the battery module 1 also includes a fifth screw connector 84, which passes through the fifth through hole 216 and is screwed into the fifth screw hole 391. The bracket 30 has a mounting base 310 on its first surface 311, the mounting base 310 has a sixth through hole 3101, the cooling fan 71 has a sixth screw hole 711, and the battery module 1 includes a sixth screw connector 85, which passes through the sixth through hole 3101 and is screwed into the sixth screw hole 711. Through the above screwing method, the heat dissipation component 70 can be disassembled and assembled, which is simple and convenient to operate.

[0062] In this embodiment of the invention, the battery module 1 includes a cell assembly 10, a circuit board 20, and a shielding plate 60. The circuit board 20 is vertically spaced from the cell assembly 10. The circuit board 20 includes a spatially isolated low-voltage region and a high-voltage region, with the voltage signal in the low-voltage region being lower than that in the high-voltage region. The shielding plate 60 is disposed between the circuit board 20 and the cell assembly 10. A grounding element 61 extends from the surface of the shielding plate 60 away from the cell assembly 10 and is connected to the circuit board 20. The shielding plate 60 reduces electromagnetic interference between the cell assembly 10 and the circuit board 20. Furthermore, the partitioned isolation of the low-voltage and high-voltage regions reduces the risk of mutual interference between high-voltage and low-voltage signals, thereby improving the safety and stability of the battery module 1.

[0063] It should be noted that while the preferred embodiments of this utility model are provided in the specification and accompanying drawings, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are not intended to impose additional limitations on the content of this utility model; their purpose is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Furthermore, the above-described technical features can be combined with each other to form various embodiments not listed above, all of which are considered to be within the scope of this utility model specification. Moreover, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A battery module, characterized in that, include: Battery cell assembly (10); A circuit board (20) is arranged vertically and vertically with the battery cell assembly (10). The circuit board (20) includes a spatially isolated low-voltage region and a high-voltage region, wherein the voltage signal of the low-voltage region is lower than that of the high-voltage region. A shielding plate (60) is disposed between the circuit board (20) and the battery cell assembly (10). A grounding element (61) extends from the surface of the shielding plate (60) away from the battery cell assembly (10) and is connected to the circuit board (20).

2. The battery module according to claim 1, characterized in that, The grounding component (61) includes an extension (611) and a grounding portion (612) connected to each other. The extension (611) extends from the shielding plate (60) in a direction toward the circuit board (20). The grounding portion (612) is disposed at one end of the extension (611) near the circuit board (20). The extension (611) and the grounding portion (612) are arranged perpendicularly. The grounding portion (612) abuts against the circuit board (20) to make the shielding plate (60) and the circuit board (20) electrically connected.

3. The battery module according to claim 1, characterized in that, There are multiple grounding components (61), some of which are connected to the low-voltage area of ​​the circuit board (20), and others are connected to the high-voltage area of ​​the circuit board (20).

4. The battery module according to claim 2, characterized in that, The battery module (1) also includes a bracket (30), the battery cell assembly (10) and the circuit board (20) are respectively disposed on opposite sides of the bracket (30), and the shielding plate (60) is disposed between the bracket (30) and the circuit board (20); The bracket (30) has a third support structure (34) on the side facing the circuit board (20), the third support structure (34) has a third screw hole (3411), the grounding part (612) has a third through hole (6121), and the circuit board (20) has a third through hole (214). The battery module (1) also includes a third screw connector (82), which passes through the third through hole (214) and the third through hole (6121) in sequence and is screwed into the third screw hole (3411).

5. The battery module according to claim 1, characterized in that, The battery module (1) also includes a bracket (30), the battery cell assembly (10) and the circuit board (20) are respectively disposed on opposite sides of the bracket (30), and the shielding plate (60) is disposed between the bracket (30) and the circuit board (20); The bracket (30) is provided with a buckle (35) on the side facing the circuit board (20). The buckle (35) includes a connecting arm (351) and a snap-fit ​​part (352). The shielding plate (60) is provided with a snap hole (601). The arm (351) passes through the snap hole (601). The snap-fit ​​part (352) snaps onto the surface of the shielding plate (60) away from the battery cell (11) assembly (10).

6. The battery module according to claim 1, characterized in that, The circuit board (20) includes a board body (21), a battery management circuit (22), and an inverter circuit (23). The battery management circuit (22) and the inverter circuit (23) are both disposed on the board body (21). The battery management circuit (22) is disposed in the low-voltage area, and the inverter circuit (23) is disposed in the high-voltage area. The battery management circuit (22) is electrically connected to the battery cell assembly (10), and the inverter circuit (23) is electrically connected to the battery management circuit (22).

7. The battery module according to claim 6, characterized in that, The battery module (1) also includes a bracket (30), the battery cell (11) assembly (10) and the circuit board (20) are respectively disposed on opposite sides of the bracket (30), and an insulating sheet (36) extends from the side of the bracket (30) away from the battery cell (11) assembly (10); The circuit board (20) has an isolation hole (211) in the low-voltage area. The circuit board (20) also includes a first DC output section (26) and a second DC output section (27) with opposite polarities. The first DC output section (26) and the second DC output section (27) are spaced apart in the low-voltage area of ​​the board body (21). The first DC output section (26) and the second DC output section (27) are electrically connected to the battery management circuit (22). The first DC output section (26) and the second DC output section (27) are located on both sides of the isolation hole (211). The insulating sheet (36) is inserted into the isolation hole (211) and is placed between the first DC output section (26) and the second DC output section (27).

8. The battery module according to any one of claims 1-7, characterized in that, The battery module (1) further includes a heat dissipation component (70), which is disposed on the side of the circuit board (20) away from the battery cell (11) assembly (10). The heat dissipation component (70) includes a heat dissipation fan (71) for removing air from the surface of the circuit board (20).

9. The battery module according to claim 8, characterized in that, The heat dissipation assembly (70) also includes a flow guide (72), which together with the circuit board (20) defines a heat dissipation space, an inlet and an outlet. The inlet and the outlet are respectively connected to the heat dissipation space, and the heat dissipation fan (71) is disposed at the outlet.

10. An electronic device, characterized in that, Includes the battery module as described in any one of claims 1-9.

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