Battery module and battery pack

Abstract

The utility model provides a battery module and a battery pack, the battery module comprises: two mounting plates, the two mounting plates are vertically arranged and oppositely arranged at an interval along the horizontal direction, and the side surfaces of the two mounting plates are provided with mounting holes in one-to-one correspondence; the plurality of battery cells correspond to the plurality of mounting holes, the battery cells are arranged along the horizontal direction, and the two ends of the battery cells in the length direction are respectively inserted into the two mounting holes of the two mounting plates; the positive electrode lead-out sheet is arranged at the top end of the mounting plate and is connected with the positive electrode of the battery cell; and the negative electrode lead-out sheet is arranged at the top end of the mounting plate, the negative electrode lead-out sheet and the positive electrode lead-out sheet are arranged at an interval, and the negative electrode lead-out sheet is connected with the negative electrode of the cell. The battery module disclosed by the utility model is low in cost, stable in structure and small in occupied space.

Description

Technical Field

[0001] The utility model relates to the field of new energy batteries, and more specifically, to a battery module and a battery pack. Background Art

[0002] Battery packs are commonly used in two-wheeled vehicles to provide sufficient power for the two-wheeled vehicles.

[0003] The battery modules in the existing battery packs of two-wheeled vehicles usually stack the battery cells and then fill them with sealant, which results in a lot of material waste, high cost, unreliable structure and low safety.

[0004] Moreover, the positive lead-out plate (the positive electrode for connecting to the outside world) and the negative lead-out plate (the negative electrode for connecting to the outside world) are usually arranged on the side, resulting in a gap between the battery module and the side wall of the shell for enclosing the battery module, which will increase the volume of the battery pack (the battery pack includes the battery module and the shell), occupy a large space, and easily cause the battery module to shake in the shell. Utility Model Content

[0005] The utility model provides a new technical solution for an energy storage component, which can at least solve the problems of high cost, unreliable structure and large occupied space in the prior art.

[0006] The utility model also provides an electrical device, comprising the above energy storage component.

[0007] According to a first aspect of the present utility model, a battery module is provided, the battery module comprising:

[0008] Two mounting plates, the two mounting plates are arranged vertically and spaced apart from each other in the horizontal direction, and corresponding mounting holes are formed on the sides of the two mounting plates;

[0009] A plurality of battery cells, the plurality of battery cells corresponding to the plurality of mounting holes, the battery cells being arranged in a horizontal direction and having both ends of the battery cells in a length direction respectively inserted into the two mounting holes of the two mounting plates;

[0010] A positive lead-out plate, the positive lead-out plate is arranged at the top of the mounting plate, and the positive lead-out plate is connected to the positive electrode of the battery cell;

[0011] A negative electrode lead-out sheet is arranged at the top of the mounting plate and is spaced apart from the positive electrode lead-out sheet, and the negative electrode lead-out sheet is connected to the negative electrode of the battery cell.

[0012] Optionally, the battery module further includes:

[0013] A thermally conductive adhesive layer is disposed between the mounting hole and the battery core.

[0014] Optionally, the battery module further comprises a plurality of connecting pieces, the connecting pieces are connected to the mounting plate, and the connecting pieces comprise:

[0015] A positive electrode connecting piece, the positive electrode connecting piece connecting the positive electrode of the battery cell and the positive electrode lead-out piece;

[0016] A negative electrode connecting piece, the negative electrode connecting piece connecting the negative electrode of the battery cell and the negative electrode lead-out piece;

[0017] At least one battery cell connecting sheet, wherein the battery cell connecting sheet connects the plurality of battery cells so that the plurality of battery cells are connected in series or in parallel.

[0018] Optionally, a first positioning hole is formed on the connecting sheet, and the battery module further includes a first positioning pin, and the first positioning hole is connected to the mounting plate through the first positioning pin.

[0019] Optionally, the connecting piece is connected to the battery core by laser welding.

[0020] Optionally, the battery module further includes:

[0021] A metal sheet, on which a second positioning hole is formed, and the metal sheet is connected to the connecting sheet;

[0022] a second positioning pin, the metal sheet being connected to the mounting plate via the second positioning pin;

[0023] A signal collection line is connected to the metal sheet.

[0024] Optionally, the battery module further includes:

[0025] A battery management system, the battery management system is connected to the signal acquisition line;

[0026] A plug connector is used to connect the positive electrode lead-out piece and the negative electrode lead-out piece.

[0027] Optionally, the battery module further includes:

[0028] Two insulating plates are respectively connected to the outer surfaces of the two mounting plates.

[0029] Optionally, the battery module further includes:

[0030] Plastic rivets, the insulating plate is connected to the mounting plate through the plastic rivets.

[0031] According to a second aspect of the present utility model, a battery pack is provided, the battery pack comprising:

[0032] A battery module, wherein the battery module is any of the battery modules described above;

[0033] A shell covers the battery module.

[0034] According to the battery module of the utility model, two mounting plates with multiple mounting holes are horizontally spaced apart and arranged relatively to each other, and multiple battery cells are inserted into the two mounting holes of the two mounting plates, so that the installation of the battery cells is simple, and the mounting plates are harder, so that there can be gaps between different battery cells. Compared with stacking battery cells and then relying on potting sealant to fix the battery cells, the battery module can withstand higher extrusion pressure, increase structural stability, improve safety, and avoid potting sealant, which causes excessive waste of sealant, thereby reducing costs, simplifying operation, and improving work efficiency.

[0035] The positive lead-out tab and the negative lead-out tab are both arranged at the top of the mounting plate. There is a predetermined space between the top of the mounting plate and the shell, which can avoid the positive lead-out tab and the negative lead-out tab being arranged on the side, thereby causing a gap between the battery module and the shell, thereby causing the battery pack to be too large, and avoid the battery module shaking in the shell.

[0036] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0038] Figure 1 is a structural diagram of a battery module according to an embodiment of the utility model;

[0039] Figure 2 yes Figure 1 Another structural diagram of the battery module in FIG.

[0040] Figure 3 A structural diagram of a battery module according to another embodiment of the utility model;

[0041] Figure 4 It is a structural diagram of a battery pack according to an embodiment of the utility model.

[0042] Reference numerals:

[0043] 10. Shell;

[0044] 20. Battery module; 21. Battery cell; 22. Mounting plate; 221. Mounting hole; 231. Positive lead-out plate; 232. Negative lead-out plate; 241. Positive connecting plate; 242. Negative connecting plate; 243. Battery cell connecting plate; 251. Metal sheet; 252. Signal acquisition line; 261. Insulating plate; 262. Plastic rivet; 27. Battery management system; 28. Connector. DETAILED DESCRIPTION

[0045] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0046] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0047] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0048] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0049] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0050] The battery module 20 according to the embodiment of the present utility model is described in detail below with reference to the accompanying drawings.

[0051] like Figures 1 to 4 As shown, the battery module 20 according to the embodiment of the present invention includes two mounting plates 22 , a plurality of battery cells 21 , a positive electrode lead-out sheet 231 and a negative electrode lead-out sheet 232 .

[0052] First, the two mounting plates 22 are described. The two mounting plates 22 are arranged vertically and spaced apart from each other in the horizontal direction. The side surfaces of the two mounting plates 22 are formed with mounting holes 221 corresponding to each other.

[0053] The two mounting plates 22 arranged opposite to each other (facing each other) can provide stable support, and corresponding mounting holes 221 are formed on the sides of the two mounting plates 22, that is, the mounting holes 221 of the two mounting plates 22 can be aligned.

[0054] Next, the plurality of battery cells 21 are described. The plurality of battery cells 21 correspond to the plurality of mounting holes 221 . The battery cells 21 are arranged in the horizontal direction and the two ends of the battery cells 21 in the length direction are respectively inserted into the two corresponding mounting holes 221 of the two mounting plates 22 .

[0055] like Figure 1 and Figure 2 As shown, the two ends of the battery cell 21 in the length direction are horizontally inserted into the two corresponding (aligned) mounting holes 221 of the two mounting plates 22. The battery cell 21 is easy to install, and the mounting plate 22 is hard, so that there are gaps between different battery cells 21. Compared with stacking the battery cells 21 and then fixing the battery cells 21 with potting sealant, the battery module 20 can withstand higher extrusion force, increase structural stability, improve safety, avoid potting sealant, waste too much sealant, reduce costs, and is easy to operate and improve work efficiency.

[0056] Finally, the positive lead-out tab 231 and the negative lead-out tab 232 are described. The positive lead-out tab 231 is disposed at the top of the mounting plate 22, and the positive lead-out tab 231 is connected to the positive electrode of the battery cell 21. The negative lead-out tab 232 is disposed at the top of the mounting plate 22 and is spaced apart from the positive lead-out tab 231, and the negative lead-out tab 232 is connected to the negative electrode of the battery cell 21.

[0057] The positive lead-out tab 231 and the negative lead-out tab 232 are both arranged at the top of the mounting plate 22, and there is a predetermined space between the top of the mounting plate 22 and the housing 10 (the battery module 20 is mainly tightly connected to the housing 10 through its bottom and side). Thus, it is possible to avoid the positive lead-out tab 231 and the negative lead-out tab 232 being arranged at the side, thereby causing a gap between the battery module 20 and the housing 10, thereby causing the volume of the battery pack to be too large, and to avoid the battery module 20 shaking in the housing 10.

[0058] In the above battery module 20, two mounting plates 22 with multiple mounting holes 221 are horizontally spaced apart and arranged relatively, and multiple battery cells 21 are inserted into the mounting holes 221 of the two mounting plates 22, so that the installation of the battery cells 21 is simple, and the mounting plates 22 are harder, so that there are gaps between different battery cells 21. Compared with stacking the battery cells 21 and then relying on potting sealant to fix the battery cells 21, the battery module 20 can withstand higher extrusion pressure, increase structural stability, improve safety, and avoid potting sealant, which causes excessive waste of sealant, thereby reducing costs, and is easy to operate and improves work efficiency.

[0059] The positive lead-out tab 231 and the negative lead-out tab 232 are both arranged at the top of the mounting plate 22. There is a predetermined space between the top of the mounting plate 22 and the shell 10. This can prevent the positive lead-out tab 231 and the negative lead-out tab 232 from being arranged on the side, thereby causing a gap between the battery module 20 and the shell 10, thereby causing the volume of the battery pack to be too large, and avoid the battery module 20 from shaking in the shell 10.

[0060] In some embodiments of the present invention, the battery module 20 further includes a thermally conductive adhesive layer, which is disposed between the mounting hole 221 and the battery core 21 .

[0061] The battery core 21 is adhered to the mounting hole 221 of the mounting plate 22 through the thermal conductive adhesive layer, so that the connection between the battery core 21 and the mounting plate 22 is more stable.

[0062] Moreover, the thermally conductive adhesive layer can conduct heat, and the temperature of the battery cell 21 can be conducted to the mounting plate 22 , thereby increasing the heat exchange area, improving the heat dissipation efficiency, and ensuring the stable operation of the battery cell 21 .

[0063] In some embodiments of the utility model, the battery module 20 further includes a plurality of connecting pieces, the connecting pieces are connected to the mounting plate 22, and the connecting pieces include a positive connecting piece 241, a negative connecting piece 242, and at least one battery cell connecting piece 243. The positive connecting piece 241 connects the positive electrode of the battery cell 21 and the positive electrode lead-out piece 231. The negative connecting piece 242 connects the negative electrode of the battery cell 21 and the negative electrode lead-out piece 232. The battery cell connecting piece 243 connects the plurality of battery cells 21 so that the plurality of battery cells 21 are connected in series or in parallel.

[0064] like Figure 1 and Figure 2 As shown, multiple battery cells 21 are connected in series or in parallel through multiple battery cell connecting pieces 243, the positive electrodes of the battery cells 21 connected in series or in parallel and the positive electrode lead-out piece 231 are connected through the positive electrode connecting piece 241, and the negative electrode connecting piece 242 is connected to the negative electrodes of the battery cells 21 connected in series or in parallel and the negative electrode lead-out piece 232. Thus, multiple battery cells 21 can be easily connected in series or in parallel through the connecting pieces, and the positive electrodes and negative electrodes of multiple battery cells 21 connected in series or in parallel can be easily connected to the positive electrode lead-out piece 231 and the negative electrode lead-out piece 232, respectively.

[0065] Optionally, a first positioning hole is formed on the connecting sheet, and the battery module 20 further includes a first positioning pin, and the first positioning hole is connected to the mounting plate 22 via the first positioning pin.

[0066] The connection piece and the mounting plate 22 can be stably and easily connected by the positioning pins, the assembly efficiency is high, and automated assembly is easy to achieve.

[0067] Optionally, the connecting pieces are connected to the battery cells 21 by laser welding.

[0068] The conventional welding between the connecting piece and the battery core 21 adopts tin soldering, which has low welding efficiency and unreliable welding points. The utility model adopts laser welding, which can improve welding efficiency and improve welding quality.

[0069] In some embodiments of the present invention, the battery module 20 further includes a metal sheet 251, a second positioning pin and a signal collection line 252. A second positioning hole is formed on the metal sheet 251, and the metal sheet 251 is connected to the connecting sheet. The metal sheet 251 is connected to the mounting plate 22 through the second positioning pin. The signal collection line 252 is connected to the metal sheet 251.

[0070] like Figure 1 As shown, the metal sheet 251 can be easily and stably set on the mounting plate 22 through the second positioning pin, the metal sheet 251 is connected to the connecting sheet, and the signal acquisition line 252 is connected to the metal sheet 251. The signal of the battery cell 21 can be stably output to a predetermined device (controller, battery management system 27, etc.) through the metal sheet 251 and the signal acquisition line 252.

[0071] In some embodiments of the present invention, the battery module 20 further includes a battery management system 27 and a connector 28. The battery management system is connected to the signal acquisition line 252. The connector 28 is connected to the positive lead-out piece 231 and the negative lead-out piece 232.

[0072] The signal acquisition line 252 is connected to the battery management system 27, and the battery management system 27 can better monitor, manage and maintain the battery cell 21. The plug connector 28 connects the positive lead-out piece 231 and the negative lead-out piece 232, and the battery module 20 can be easily connected to the outside world through the plug connector 28.

[0073] In some embodiments of the present invention, the battery module 20 further includes two insulating plates 261 , and the two insulating plates 261 are respectively connected to the outer surfaces of the two mounting plates 22 .

[0074] The insulating plate 261 can provide better protection and electrical isolation for the mounting plate 22 and the battery cells 21 , and prevent the battery module 20 from leaking electricity.

[0075] Furthermore, the battery module 20 further includes a plastic rivet 262 , and the insulating plate 261 is connected to the mounting plate 22 via the plastic rivet 262 .

[0076] The insulating plate 261 and the mounting plate 22 can be easily connected by the plastic rivets 262, with high assembly efficiency and good connection stability.

[0077] The battery pack according to the embodiment of the utility model is described in detail below with reference to the accompanying drawings.

[0078] like Figure 4According to an embodiment of the present invention, the battery pack includes a battery module 20 and a housing 10 . The battery module 20 is the above-mentioned battery module 20 . The housing 10 covers the battery module 20 .

[0079] The battery module 20 can be well protected by the housing 10. The overall structure of the battery pack has high strength and high stability.

[0080] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A battery module (20), characterized in that: The battery module (20) comprises: Two mounting plates (22), the two mounting plates (22) being arranged vertically and spaced apart from each other in a horizontal direction and arranged opposite to each other, and corresponding mounting holes (221) being formed on the sides of the two mounting plates (22); A plurality of battery cells (21), the plurality of battery cells (21) corresponding to the plurality of mounting holes (221), the battery cells (21) being arranged in a horizontal direction and having two ends in a length direction thereof respectively inserted into two mounting holes (221) of two mounting plates (22); A positive electrode lead-out sheet (231), the positive electrode lead-out sheet (231) being arranged at the top end of the mounting plate (22), the positive electrode lead-out sheet (231) being connected to the positive electrode of the battery cell (21); A negative electrode lead-out sheet (232), the negative electrode lead-out sheet (232) being arranged at the top end of the mounting plate (22) and spaced apart from the positive electrode lead-out sheet (231), the negative electrode lead-out sheet (232) being connected to the negative electrode of the battery cell (21).

2. The battery module (20) according to claim 1, characterized in that: The battery module (20) further comprises: A heat-conducting adhesive layer, the heat-conducting adhesive layer being arranged between the mounting hole (221) and the battery core (21).

3. The battery module (20) according to claim 1, characterized in that: The battery module (20) further comprises a plurality of connecting pieces, wherein the connecting pieces are connected to the mounting plate (22), and the connecting pieces comprise: A positive electrode connecting sheet (241), the positive electrode connecting sheet (241) connecting the positive electrode of the battery cell (21) and the positive electrode lead-out sheet (231); A negative electrode connecting piece (242), wherein the negative electrode connecting piece (242) connects the negative electrode of the battery cell (21) and the negative electrode lead-out piece (232); At least one battery cell connecting sheet (243), wherein the battery cell connecting sheet (243) connects the plurality of battery cells (21) so that the plurality of battery cells (21) are connected in series or in parallel.

4. The battery module (20) according to claim 3, characterized in that: A first positioning hole is formed on the connecting plate, and the battery module (20) further comprises a first positioning pin, and the first positioning hole is connected to the mounting plate (22) via the first positioning pin.

5. The battery module (20) according to claim 3, characterized in that: The connecting piece is connected to the battery core (21) by laser welding.

6. The battery module (20) according to claim 3, characterized in that: The battery module (20) further comprises: A metal sheet (251), a second positioning hole being formed on the metal sheet (251), and the metal sheet (251) being connected to the connecting sheet; A second positioning pin, the metal sheet (251) being connected to the mounting plate (22) via the second positioning pin; A signal collection line (252), wherein the signal collection line (252) is connected to the metal sheet (251).

7. The battery module (20) according to claim 6, characterized in that: The battery module (20) further comprises: A battery management system (27), the battery management system (27) being connected to the signal acquisition line (252); A plug connector (28), wherein the plug connector (28) connects the positive electrode lead-out piece (231) and the negative electrode lead-out piece (232).

8. The battery module (20) according to claim 1, characterized in that: The battery module (20) further comprises: Two insulating plates (261), the two insulating plates (261) are respectively connected to the outer surfaces of the two mounting plates (22).

9. The battery module (20) according to claim 8, characterized in that: The battery module (20) further comprises: A plastic rivet (262), wherein the insulating plate (261) is connected to the mounting plate (22) via the plastic rivet (262).

10. A battery pack, characterized in that: The battery pack comprises: A battery module (20), wherein the battery module (20) is the battery module (20) according to any one of claims 1 to 9; A shell (10), wherein the shell (10) covers the battery module (20).

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