Battery module and battery pack

Abstract

The utility model discloses a battery module and a battery pack, the battery module comprises: battery cells arranged in the thickness direction; the BMS slave plate is arranged at the top of the battery cell; and the connecting assembly is connected between the BMS slave plate and the busbar. According to the battery module disclosed by the utility model, the BMS slave plate is arranged at the top of the battery cell, so that the overall single-side collection is realized, the length of the wire harness is reduced, the virtual connection condition of a wire harness crimping loop is effectively avoided, the voltage jump condition is prevented, the production cost is reduced, and the BMS slave plate avoids the position of a side explosion-proof valve, so that the production efficiency is improved. The condition that the BMS acquisition device is directly ablated by thermal runaway is reduced, the thermal runaway signal can be effectively reported, and the safety coefficient of the battery module is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, in particular to a battery module and a battery pack. Background Art

[0002] The relevant technology points out that with the sharp increase in the number of cars in my country, traditional fuel vehicles have become one of the main sources of environmental pollution in my country. Electric vehicles have become an important industry for the development of new energy vehicles due to their energy-saving and environmentally friendly characteristics. The mainboard of the battery management system in the battery pack is mainly connected to the PCB circuit and the wiring harness through a plug-in. The male end of the plug-in is welded on the PCB board, and the female terminal is crimped to the wiring harness. The process is complex, with many connectors, and it is easy to have problems with terminal crimping, foreign matter in the terminal expansion hole, and virtual connection voltage collection jump. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a battery module with a simple structure and low production cost.

[0004] The utility model also provides a battery pack having the battery module.

[0005] The battery module according to the first aspect of the utility model comprises: battery cells arranged in the thickness direction; a BMS slave board arranged on the top of the battery cells; and a connecting component connected between the BMS slave board and a bus bar.

[0006] According to the battery module of the utility model, by arranging the BMS slave board on the top of the battery cell, overall single-side collection is achieved, the length of the wiring harness is reduced, and the virtual connection of the wiring harness crimping circuit is effectively avoided, the voltage jump is prevented, and the production cost is reduced. The BMS slave board avoids the position of the side explosion-proof valve, which reduces the situation of thermal runaway directly burning the BMS collection device, ensures that the thermal runaway signal can be effectively reported, and improves the safety factor of the battery module.

[0007] In some embodiments, the connection assembly includes: a first connection member, the first connection member includes: a wiring harness and a first nickel sheet, one end of the wiring harness is welded to the BMS from the board and the other end is welded to the first nickel sheet, the first nickel sheet is welded to the bus; a second connection member, the second connection member includes: a wiring harness and a second nickel sheet, one end of the wiring harness is welded to the BMS from the board and the other end is welded to one end of the second nickel sheet, one end of the second nickel sheet is welded to the bus, and the other end of the second nickel sheet is welded to the shell of the battery cell.

[0008] In some embodiments, the second nickel sheet includes a first segment, a second segment, and a third segment, the first segment and the third segment extend in a vertical direction, the second segment extends in a horizontal direction, one end of the first segment is connected to the bus and the other end is connected to one end of the second segment, the other end of the second segment is connected to one end of the third segment, and the other end of the third segment is connected to the shell of the battery cell.

[0009] In some embodiments, a welding hole is formed on the BMS slave plate, and the one end of the wiring harness extends into the welding hole and is welded to the BMS slave plate.

[0010] In some embodiments, the battery module further includes: an insulating member, wherein the insulating member is disposed between the wiring harness and the first nickel sheet and between the wiring harness and the second nickel sheet, and an insulating member is disposed between the bus bar and the first nickel sheet and between the bus bar and the second nickel sheet.

[0011] In some embodiments, the battery module further includes: a fixing member, wherein the fixing member is disposed between the BMS slave board and the shell of the battery cell.

[0012] In some embodiments, the battery module further includes: a BMS module, and the BMS module is disposed on the BMS slave board.

[0013] In some embodiments, the battery cell includes an explosion-proof valve, and the explosion-proof valve is arranged adjacent to the bus bar and spaced apart.

[0014] In some embodiments, the battery cell has a pole, and the pole is electrically connected to the busbar.

[0015] A battery pack according to a second aspect of the present invention comprises a battery module according to the first aspect of the present invention.

[0016] According to the battery pack of the utility model, by providing the battery module of the first aspect above, the internal space utilization of the battery pack is improved, the volume energy density of the battery pack is increased, the cost of the battery pack is reduced, the weight of the battery pack is reduced, and thus the overall performance of the battery pack is improved.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of a battery module according to an embodiment of the utility model;

[0019] Figure 2 yes Figure 1 A schematic diagram of another perspective of the battery module shown in ;

[0020] Figure 3 yes Figure 1 A schematic diagram of a battery module from another perspective shown in FIG.

[0021] Figure 4 yes Figure 1 A schematic diagram of a battery module from another perspective shown in FIG.

[0022] Figure 5 yes Figure 1 A schematic diagram of a battery module from yet another perspective shown in FIG.

[0023] Figure 6 yes Figure 1 Schematic diagram of the second nickel sheet shown in .

[0024] Reference numerals:

[0025] 100. Battery module; 1. Battery cell; 11. Explosion-proof valve; 2. BMS slave board; 21. Welding hole; 3. Connecting assembly; 31. First nickel sheet; 32. Second nickel sheet; 321. First section; 322. Second section; 323. Third section; 33. Wiring harness; 4. Fixings; 5. Busbar; 6. High-voltage output pole. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0027] Reference below Figure 1-Figure 6 A battery module 100 according to an embodiment of the first aspect of the present invention is described.

[0028] like Figure 1-Figure 6 As shown, the battery module 100 according to the embodiment of the first aspect of the utility model includes: a battery cell 1, a BMS slave board 2 and a connection component 3.

[0029] Specifically, the battery cells 1 are arranged in the thickness direction, the BMS slave board 2 is arranged on the top of the battery cells 1, and the connection assembly 3 is connected between the BMS slave board 2 and the bus bar 5. Therefore, the battery module 100 has a simple structure and a clever design, which reduces the production cost.

[0030] According to the battery module 100 of the embodiment of the utility model, by arranging the BMS from the board 2 on the top of the battery cell 1, overall single-sided collection is achieved, the length of the wiring harness 33 is reduced, and the virtual connection of the crimping circuit of the wiring harness 33 is effectively avoided, the voltage jump is prevented, and the production cost is reduced. In addition, the BMS from the board 2 avoids the position of the side explosion-proof valve 11, which reduces the direct ablation of the BMS collection device due to thermal runaway, ensures that the thermal runaway signal can be effectively reported, and improves the safety factor of the battery module 100.

[0031] In some embodiments of the utility model, the connection assembly 3 includes: a first connector and a second connector, the first connector includes: a wire harness 33 and a first nickel sheet 31, one end of the wire harness 33 is welded to the BMS slave board 2 and the other end is welded to the first nickel sheet 31, and the first nickel sheet 31 is welded to the bus 5; the second connector includes: a wire harness 33 and a second nickel sheet 32, one end of the wire harness 33 is welded to the BMS slave board 2 and the other end is welded to one end of the second nickel sheet 32, one end of the second nickel sheet 32 ​​is welded to the bus 5, and the other end of the second nickel sheet 32 ​​is welded to the shell of the battery cell 1. Thus, the BMS is connected through the wire harness 33, and the collection wire harness 33 is integrated on the BMS, which improves the compatibility of the BMS, is compatible with batteries 1 of different widths, and has strong versatility.

[0032] In some embodiments of the present invention, the second nickel sheet 32 ​​includes a first section 321, a second section 322 and a third section 323, the first section 321 and the third section 323 extend in the vertical direction, the second section 322 extends in the horizontal direction, one end of the first section 321 is connected to the bus 5 and the other end is connected to one end of the second section 322, the other end of the second section 322 is connected to one end of the third section 323, and the other end of the third section 323 is connected to the shell of the battery cell 1. Figure 6 As shown, the second nickel sheet 32 ​​is formed into a Z-shaped structure, which can effectively absorb tolerance during welding, reduce welding stress, simplify the overall structure, make the process simple, and reduce failure rate and cost.

[0033] In addition, a second nickel sheet 32 ​​is also provided at the other end of the battery cell 1 , one end of the second nickel sheet 32 ​​is connected to the shell of the battery cell 1 , and the other end of the second nickel sheet 32 ​​is connected to the bus bar 5 .

[0034] In some embodiments of the present invention, a welding hole 21 is formed on the BMS slave plate 2, and one end of the wire harness 33 extends into the welding hole 21 and is welded to the BMS slave plate 2. Thus, the wire harness 33 passes through the welding hole 21 and is welded on the top of the BMS slave plate 2, which improves the firmness of the welding and increases the pulling force.

[0035] Specifically, the wire harness 33 and the nickel sheet are welded by soldering, and the nickel sheet and the shell of the battery cell 1 are welded by laser welding, thereby ensuring the firmness of the welding.

[0036] In some embodiments of the present invention, the battery module 100 further includes: an insulating member, which is disposed between the wiring harness 33 and the first nickel sheet 31 and between the wiring harness 33 and the second nickel sheet 32, and an insulating member is disposed between the bus bar 5 and the first nickel sheet 31 and between the bus bar 5 and the second nickel sheet 32. Thus, the firmness of welding is further enhanced, and the insulating glue fully covers the whole to insulate, isolate water vapor, avoid corrosion, extend the service life of the battery module 100, and reduce the failure rate of the battery module 100.

[0037] In some embodiments of the present invention, the battery module 100 further includes a fixing member 4, which is disposed between the BMS slave board 2 and the housing of the battery cell 1. Figure 1 As shown, there are three fixing members 4 , which are evenly spaced apart in the length direction of the BMS slave board 2 and are used to fix and support the BMS slave board 2 .

[0038] In some embodiments of the present invention, the battery module 100 further includes: a BMS module, which is disposed on the BMS slave board 2. Specifically, batteries have some disadvantages, such as low storage energy, short life, problems with series and parallel use, use safety, and difficulty in estimating battery power. The performance of batteries is very complex, and the characteristics of different types of batteries vary greatly. The battery management system (BMS) is mainly to improve the utilization rate of batteries, prevent overcharging and over-discharging of batteries, extend the service life of batteries, and monitor the status of batteries.

[0039] In some embodiments of the present invention, the battery cell 1 includes an explosion-proof valve 11, and the explosion-proof valve 11 is arranged adjacent to and spaced from the bus bar 5. Thus, the safety factor of the battery module 100 is improved, and the use risk of the battery cell 1 is reduced.

[0040] In some embodiments of the present invention, the battery cell 1 has a pole, and the pole is electrically connected to the bus bar 5. Therefore, the connection method is simple, and the connection stability of the battery module 100 is ensured.

[0041] Furthermore, the battery module 100 further includes a high-voltage output electrode 6 , which is disposed on one side of the battery module 100 and is electrically connected to the battery cell 1 .

[0042] The battery pack according to the second embodiment of the present invention includes the battery module 100 according to the first embodiment of the present invention.

[0043] According to the battery pack of the embodiment of the utility model, by setting the battery module 100 of the first embodiment, the internal space utilization of the battery pack is improved, the volume energy density of the battery pack is increased, the cost of the battery pack is reduced, the weight of the battery pack is reduced, and the overall performance of the battery pack is improved.

[0044] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0046] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0048] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery module, characterized in that: include: Battery cells, the battery cells are arranged in a thickness direction; A BMS slave board, wherein the BMS slave board is disposed on the top of the battery cell; A connection component is connected between the BMS slave board and the bus bar.

2. The battery module according to claim 1, characterized in that: The connection component comprises: A first connector, the first connector comprising: a wire harness and a first nickel sheet, one end of the wire harness is welded to the BMS slave plate and the other end is welded to the first nickel sheet, the first nickel sheet is welded to the bus bar; The second connector includes: a wiring harness and a second nickel sheet, one end of the wiring harness is welded to the BMS slave plate and the other end is welded to one end of the second nickel sheet, one end of the second nickel sheet is welded to the bus bar, and the other end of the second nickel sheet is welded to the shell of the battery cell.

3. The battery module according to claim 2, characterized in that: The second nickel sheet includes a first section, a second section and a third section, the first section and the third section extend in a vertical direction, the second section extends in a horizontal direction, one end of the first section is connected to the bus and the other end is connected to one end of the second section, the other end of the second section is connected to one end of the third section, and the other end of the third section is connected to the shell of the battery cell.

4. The battery module according to claim 3, characterized in that: The BMS slave plate is formed with a welding hole, and the one end of the wiring harness extends into the welding hole and is welded to the BMS slave plate.

5. The battery module according to claim 4, characterized in that: Also includes: An insulating member is provided between the wiring harness and the first nickel sheet and between the wiring harness and the second nickel sheet, and an insulating member is provided between the bus bar and the first nickel sheet and between the bus bar and the second nickel sheet.

6. The battery module according to any one of claims 1 to 5, characterized in that: Also includes: A fixing member is arranged between the BMS slave board and the shell of the battery cell.

7. The battery module according to any one of claims 1 to 5, characterized in that: Also includes: A BMS module is provided on the BMS slave board.

8. The battery module according to any one of claims 1 to 5, characterized in that: The battery core includes an explosion-proof valve, and the explosion-proof valve is arranged adjacent to the bus bar at intervals.

9. The battery module according to any one of claims 1 to 5, characterized in that: The battery cell has a pole, and the pole is electrically connected to the busbar.

10. A battery pack, characterized in that: A battery module comprising any one of claims 1 to 9.

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