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 comprises a first nickel sheet and a second nickel sheet, the first nickel sheet is connected between the BMS slave plate and the busbar, and the second nickel sheet is connected between the BMS slave plate and the shell of the battery cell. 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 vertical space of the whole pack is saved, the whole 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 production efficiency is improved. And the BMS slave plate avoids the position of the side explosion-proof valve, so that the situation that the BMS acquisition device is directly ablated by thermal runaway is reduced, a 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] 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 and there are many connectors. 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 includes: battery cells, which are arranged in the thickness direction; a BMS slave plate, which is arranged on the top of the battery cells; a connecting component, which includes: a first nickel sheet and a second nickel sheet, the first nickel sheet is connected between the BMS slave plate and the bus, and the second nickel sheet is connected between the BMS slave plate and the shell of the battery cell.

[0006] According to the battery module of the utility model, by arranging the BMS slave board on the top of the battery cell, the vertical space of the whole package is saved, the overall single-sided collection is realized, 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 first nickel sheet includes a first segment, a second segment, a third segment, a fourth segment, a fifth segment and a sixth segment connected in sequence, the first segment extends in a horizontal direction and is welded to the BMS slave plate, the second segment extends in a vertical direction, one end of the first segment is connected to one end of the second segment, the third segment extends in a horizontal direction, the other end of the second segment is connected to one end of the third segment, the fourth segment extends in a vertical direction, the other end of the third segment is connected to one end of the fourth segment, the fifth segment extends in a horizontal direction, the other end of the fourth segment is connected to one end of the fifth segment, the sixth segment extends in a vertical direction, the other end of the fifth segment is connected to the sixth segment, and the sixth segment is welded to the bus.

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

[0009] In some embodiments, the connecting assembly also includes a third nickel sheet, which is connected between the shell of the battery cell and the bus, and the third nickel sheet includes a first connecting segment, a second connecting segment and a third connecting segment, the first connecting segment and the third connecting segment extend in a vertical direction, the second connecting segment extends in a horizontal direction, one end of the first connecting segment is connected to the bus and the other end is connected to one end of the second connecting segment, the other end of the second connecting segment is connected to one end of the third connecting segment, and the other end of the third connecting segment is connected to the shell of the battery cell.

[0010] In some embodiments, the battery module further includes: an insulating member, which is arranged between the BMS slave plate and the first nickel sheet and between the BMS slave plate and the second nickel sheet, and insulating members are arranged between the bus and the first nickel sheet and between the battery cell shell 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 2 A schematic diagram of a first nickel sheet shown in ;

[0022] Figure 5 yes Figure 2 A schematic diagram of a second nickel sheet shown in ;

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

[0024] Reference numerals:

[0025] 100. Battery module;

[0026] 1. Battery cell; 11. Explosion-proof valve;

[0027] 2. BMS slave board;

[0028] 3. Connecting assembly; 31. First nickel sheet; 311. First section; 312. Second section; 313. Third section; 314. Fourth section; 315. Fifth section; 316. Sixth section;

[0029] 32, second nickel sheet; 321, first segment; 322, second segment; 323, third segment; 324, fourth segment;

[0030] 33, third nickel sheet; 331, first connecting section; 332, second connecting section; 333, third connecting section;

[0031] 4. Fixing parts; 5. Bus; 6. High voltage output pole. DETAILED DESCRIPTION

[0032] 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.

[0033] Reference below Figure 1-Figure 6 A battery module 100 according to an embodiment of the first aspect of the present invention is described.

[0034] like Figure 1-6 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.

[0035] 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 connecting assembly 3 includes: a first nickel sheet 31 and a second nickel sheet 32, the first nickel sheet 31 is connected between the BMS slave board 2 and the bus bar 5, and the second nickel sheet 32 ​​is connected between the BMS slave board 2 and the shell of the battery cells 1. Therefore, the battery module 100 has a simple structure and a clever design, which reduces the production cost.

[0036] According to the battery module 100 of the embodiment of the utility model, by arranging the BMS slave board 2 on the top of the battery cell 1, the vertical space of the whole package is saved, the overall single-sided collection is realized, 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. In addition, the BMS slave 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.

[0037] In some embodiments of the present invention, Figure 4As shown, the first nickel sheet 31 includes a first section 311, a second section 312, a third section 313, a fourth section 314, a fifth section 315 and a sixth section 316 which are connected in sequence. The first section 311 extends in the horizontal direction and is welded to the BMS slave plate 2. The second section 312 extends in the vertical direction. One end of the first section 311 is connected to one end of the second section 312. The third section 313 extends in the horizontal direction. The other end of the second section 312 is connected to one end of the third section 313. The fourth section 314 extends in the vertical direction. The other end of the third section 313 is connected to one end of the fourth section 314. The fifth section 315 extends in the horizontal direction. The other end of the fourth section 314 is connected to one end of the fifth section 315. The sixth section 316 extends in the vertical direction. The other end of the fifth section 315 is connected to the sixth section 316. The sixth section 316 is welded to the bus 5. Therefore, the local bending structure of the L-shaped first nickel sheet 31 can effectively absorb the tolerance, reduce the welding stress, simplify the overall structure, simplify the process, low failure rate and low production cost.

[0038] In some embodiments of the present invention, for example Figure 5 As shown, the second nickel sheet 32 ​​includes a first segment 321, a second segment 322, a third segment 323 and a fourth segment 324 connected in sequence, the first segment 321 extends in the horizontal direction and is welded to the BMS slave plate 2, the second segment 322 extends in the vertical direction, one end of the first segment 321 is connected to one end of the second segment 322, the third segment 323 extends in the horizontal direction, the other end of the second segment 322 is connected to one end of the third segment 323, the fourth segment 324 extends in the vertical direction, the other end of the third segment 323 is connected to the fourth segment 324, and the fourth segment 324 is welded to the shell of the battery cell 1. Thus, the BMS is connected through the first nickel sheet 31 and the second nickel sheet 32, which improves the compatibility of the BMS, is compatible with batteries 1 of different widths, and has strong versatility.

[0039] In some embodiments of the utility model, the connection assembly 3 further includes a third nickel sheet 33, which is connected between the shell of the battery cell 1 and the bus 5, and includes a first connection segment 331, a second connection segment 332 and a third connection segment 333, wherein the first connection segment 331 and the third connection segment 333 extend in a vertical direction, and the second connection segment 332 extends in a horizontal direction, wherein one end of the first connection segment 331 is connected to the bus 5 and the other end is connected to one end of the second connection segment 332, and the other end of the second connection segment 332 is connected to one end of the third connection segment 333, and the other end of the third connection segment 333 is connected to the shell of the battery cell 1. Figure 6 As shown, the third nickel sheet 33 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.

[0040] As can be seen from the above, the BMS of the battery module 100 of the embodiment of the utility model is directly connected to the collection point through the nickel sheet, which reduces the resistance of the collection loop, reduces energy consumption, and improves the voltage collection accuracy.

[0041] In some embodiments of the present invention, the battery module 100 further includes: an insulating member, which is disposed between the BMS slave plate 2 and the first nickel sheet 31 and between the BMS slave plate 2 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 shell of the battery cell 1 and the second nickel sheet 32. Thus, the firmness of the 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.

[0042] 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 2 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 .

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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 .

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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, the connection component includes: a first nickel sheet and a second nickel sheet, the first nickel sheet is connected between the BMS slave board and the bus bar, and the second nickel sheet is connected between the BMS slave board and the shell of the battery cell.

2. The battery module according to claim 1, characterized in that: The first nickel sheet includes a first section, a second section, a third section, a fourth section, a fifth section and a sixth section which are connected in sequence, the first section extends in a horizontal direction and is welded to the BMS slave plate, the second section extends in a vertical direction, one end of the first section is connected to one end of the second section, the third section extends in a horizontal direction, the other end of the second section is connected to one end of the third section, the fourth section extends in a vertical direction, the other end of the third section is connected to one end of the fourth section, the fifth section extends in a horizontal direction, the other end of the fourth section is connected to one end of the fifth section, the sixth section extends in a vertical direction, the other end of the fifth section is connected to the sixth section, and the sixth section is welded to the bus.

3. The battery module according to claim 2, characterized in that: The second nickel sheet includes a first segment, a second segment, a third segment and a fourth segment connected in sequence, the first segment extends in a horizontal direction and is welded to the BMS slave plate, the second segment extends in a vertical direction, one end of the first segment is connected to one end of the second segment, the third segment extends in a horizontal direction, the other end of the second segment is connected to one end of the third segment, the fourth segment extends in a vertical direction, the other end of the third segment is connected to the fourth segment, and the fourth segment is welded to the shell of the battery cell.

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

5. The battery module according to claim 4, characterized in that: Also includes: An insulating member is provided between the BMS slave plate and the first nickel sheet and between the BMS slave plate and the second nickel sheet, and an insulating member is provided between the bus bar and the first nickel sheet and between the shell of the battery cell 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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