Battery module, battery pack and electric device

Abstract

The utility model relates to a battery module, a battery pack and a power utilization device, the battery module comprises a battery cell group, the battery cell group comprises a plurality of battery cells arranged along a first direction, at least one end of the battery cell group along a second direction forms a pole end with a pole, the first direction is the length direction of the battery module, and the second direction is the width direction of the battery module; the two groups of baffle assemblies are respectively arranged on two sides of the battery cell group along the second direction; the baffle assembly close to the pole end comprises an isolation plate and a baffle, the isolation plate comprises a main body plate and turnover plates arranged at the two ends of the main body plate in the third direction, the main body plate is located between the baffle and the battery cell group, a busbar electrically connected with the pole is clamped between the main body plate and the baffle, and the turnover plates are turned over relative to the main body plate; at least part of the surface, back to the main body plate, of the baffle is limited in the second direction, and the third direction is the height direction of the battery module.

Description

Technical Field

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

[0002] With the rapid expansion and development of the new energy market, the market share of new energy vehicles is gradually increasing. As a result, the application of power batteries, the core component of new energy vehicles, is becoming increasingly widespread in people's lives.

[0003] A power battery consists of a battery box and battery modules. The battery modules are installed in the battery box, which serves to support and protect them. In some cases, the battery module's terminals face the side wall of the battery box, and the busbar connected to the terminals also faces the side wall. When the top of the battery module is potted to fill the gap between the battery module and the battery box or between the battery module and the cold plate, the potting compound can easily flow towards the busbar, obstructing its path and resulting in poor connection between the busbar and components such as the terminals and circuit boards. Utility Model Content

[0004] Therefore, it is necessary to address the problem that adhesive tends to flow into the busbar and block it in traditional technologies, and to provide a battery module, battery pack, and power device that can block the flow of adhesive into the busbar to avoid the adhesive blocking the busbar.

[0005] On one hand, this application provides a battery module, including:

[0006] A battery cell assembly includes a plurality of battery cells arranged along a first direction, wherein at least one end of the battery cell assembly along a second direction forms an electrode end with a terminal post, wherein the first direction is the length direction of the battery module and the second direction is the width direction of the battery module.

[0007] Two sets of baffle assemblies are respectively disposed on both sides of the battery cell assembly along the second direction;

[0008] The baffle assembly located near the terminal end includes an isolation plate and a baffle. The isolation plate includes a main plate and folding plates disposed at both ends of the main plate along a third direction. The main plate is located between the baffle and the cell assembly. A busbar electrically connected to the terminal is sandwiched between the main plate and the baffle. The folding plates are folded relative to the main plate and limit at least a portion of the surface of the baffle facing away from the main plate along a second direction, where the third direction is the height direction of the battery module.

[0009] In one embodiment, each of the battery cells has a terminal post on both sides in the second direction, and the battery cell assembly has the terminal post end on both sides in the second direction.

[0010] In one embodiment, each of the battery cells has multiple sets of terminals, each set of terminals including a positive terminal and a negative terminal.

[0011] In one embodiment, the main body plate is provided with a through hole along the second direction, and the busbar is electrically connected to the electrode through the through hole;

[0012] and / or

[0013] The battery module also includes a circuit board extending along the first direction, the circuit board being sandwiched between the baffle and the main body plate and electrically connected to the busbar.

[0014] In one embodiment, the main body plate is a flat plate, and the folding plate includes a first connecting plate and a second connecting plate connected to each other. The end of the first connecting plate away from the second connecting plate is connected to the main body plate and has an included angle. The second connecting plate is bent relative to the first connecting plate to limit the surface of the baffle facing away from the main body plate in the second direction.

[0015] and / or

[0016] The battery module also includes two end plates, which are respectively disposed on both sides of the cell assembly along the first direction. Each end plate is connected to two sets of baffle assemblies on both sides along the second direction.

[0017] On the other hand, this application also provides a battery pack, including a battery box and the aforementioned battery module, wherein the battery module is disposed inside the battery box, and the terminal end of the battery module is disposed facing the side wall of the battery box.

[0018] In one embodiment, the battery pack further includes a first liquid cooling plate and a second liquid cooling plate, which are respectively disposed on both sides of the battery module along the third direction.

[0019] In one embodiment, a first thermally conductive adhesive layer is provided between the first liquid cooling plate and the battery module;

[0020] and / or

[0021] A second thermally conductive adhesive layer is provided between the second liquid cooling plate and the battery module.

[0022] In one embodiment, the battery cell has an explosion-proof valve on one side along the third direction, and each of the explosion-proof valves is arranged sequentially along the first direction;

[0023] The battery pack also includes a baffle strip extending along the first direction, and two baffle strips are respectively disposed opposite to each other on both sides of the explosion-proof valve along the second direction.

[0024] In another aspect, this application also provides an electrical device, including the battery pack described above.

[0025] Compared with the prior art, this application has the following beneficial effects:

[0026] In the aforementioned battery module, battery pack, and electrical device, since the main plate is located between the baffle and the cell assembly, the folding plate folds relative to the main plate and limits at least a portion of the baffle's surface facing away from the main plate along the second direction. That is, the folding plate can cover the end of the baffle in the third direction, thus blocking the gap formed between the end of the main plate in the third direction and the baffle. The adhesive used to fill the gap (such as adhesive used to fill the gap between the battery module and the battery box or between the battery module and the cold plate) will not flow through the gap to the busbar located between the main plate and the baffle, but will flow along the folding plate to the side of the baffle facing away from the main plate in the second direction. This prevents the adhesive from blocking the busbar and ensures the connection effect between the busbar and components such as the terminals and circuit boards. Attached Figure Description

[0027] Figure 1 This is a structural diagram of a battery module provided in one embodiment of this application;

[0028] Figure 2 for Figure 1 The diagram shows a structural view of the battery module from another perspective.

[0029] Figure 3 for Figure 1 An exploded view of the battery module shown;

[0030] Figure 4 for Figure 1 Another exploded view of the battery module shown;

[0031] Figure 5 for Figure 1 Another exploded view of the battery module shown;

[0032] Figure 6 for Figure 1 The diagram shows the structure of the battery cell in the battery module.

[0033] Figure 7 for Figure 4 Enlarged view of point A of the battery module shown;

[0034] Figure 8 An exploded view of a battery pack provided in an embodiment of this application;

[0035] Figure 9 for Figure 8 The assembly diagram of the battery pack shown;

[0036] Figure 10 for Figure 9 A cross-sectional view of the battery pack shown;

[0037] Figure 11 for Figure 8 The diagram shows a partial structural diagram of the battery pack.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1000, Battery Pack; 100, Battery Module; 10, Cell Assembly; 11, Cell; 111, Terminal Post; 111a, Positive Terminal Post; 111b, Negative Terminal Post; 112, Terminal Post Assembly; 113, Explosion-proof Valve; 20, End Plate; 30, Baffle Assembly; 31, Isolation Plate; 311, Main Plate; 3111, Through Hole; 312, Folding Plate; 3121, First Connecting Plate; 3122, Second Connecting Plate; 32, Baffle; 40, Busbar; 50, Circuit Board; 200, Battery Box; 300, First Liquid Cooling Plate; 400, Second Liquid Cooling Plate; 500, Sealing Strip; 600, Cover Plate; X, First Direction; Y, Second Direction; Z, Third Direction. Detailed Implementation

[0040] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0041] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0043] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0044] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0045] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0046] See Figures 1-3This application provides a battery module 100, including a cell assembly 10. The cell assembly 10 includes a plurality of cells 11 arranged along a first direction X, and at least one end of the cell assembly 10 along a second direction Y forms a terminal end with a terminal post 111. In some specific embodiments, each cell 11 has a terminal post 111 at one end in the second direction Y, and the cell assembly 10 forms a terminal end along the second direction Y. In other specific embodiments, each cell 11 has a terminal post 111 at both ends in the second direction Y, and the cell assembly 10 forms a terminal end at both ends in the second direction Y. Wherein, the first direction X is the length direction of the battery module 100, and the second direction Y is the width direction of the battery module 100. It can be seen that the cell 11 is a cell 11 with a terminal post 111 extending from its side.

[0047] The battery module 100 also includes two sets of baffle assemblies 30, which are respectively disposed on both sides (both ends) of the cell assembly 10 along the second direction Y. (Continue reading) Figure 3 The baffle assembly 30 located near the terminal end includes an isolation plate 31 and a baffle 32. That is, when both ends of the cell assembly 10 along the second direction Y form terminal ends, both baffle assemblies 30 include an isolation plate 31 and a baffle 32. When one end of the cell assembly 10 along the second direction Y forms a terminal end, the baffle assembly 30 corresponding to that terminal end includes an isolation plate 31 and a baffle 32.

[0048] Further reading Figure 3 and Figure 4 The separator 31 includes a main plate 311 and a folding plate 312. The folding plate 312 is connected to the main plate 311, and the main plate 311 has folding plates 312 at both ends along the third direction Z. The third direction Z is the height direction of the battery module 100. The main plate 311 is located between the baffle 32 and the cell assembly 10, that is, along the second direction Y, the main plate 311 is sandwiched between the baffle 32 and the cell assembly 10. A busbar 40 electrically connected to the terminal post 111 is sandwiched between the main plate 311 and the baffle 32, that is, the busbar 40 is sandwiched between the main plate 311 and the baffle 32 along the second direction Y. The folding plate 312 is folded relative to the main plate 311 and limits at least a portion of the surface of the baffle 32 facing away from the main plate 311 along the second direction Y.

[0049] See Figure 5 The battery module 100 also includes a circuit board 50 extending along the first direction X. The circuit board 50 is sandwiched between the baffle 32 and the main body plate 311 and is electrically connected to the busbar 40 for collecting electrical signals.

[0050] Since the main plate 311 is located between the baffle 32 and the cell assembly 10, the folding plate 312 folds relative to the main plate 311 and limits at least a portion of the surface of the baffle 32 facing away from the main plate 311 along the second direction Y. That is, the folding plate 312 can cover the end of the baffle 32 in the third direction Z. The folding plate 312 can block the gap formed between the end of the main plate 311 in the third direction Z and the baffle 32. The glue used to fill the gap (such as the glue used to fill the gap between the battery module 100 and the battery box 200 or the glue used to fill the gap between the battery module 100 and the cold plate) will not flow through the gap to the busbar 40 located between the main plate 311 and the baffle 32. Instead, it flows along the folding plate 312 to the side of the baffle 32 facing away from the main plate 311 along the second direction Y. This will not cause the glue to block the busbar 40, thus ensuring the connection effect between the busbar 40 and components such as the terminal post 111 and the circuit board 50.

[0051] In some embodiments, see Figure 6 Each cell 11 has multiple sets of terminal posts 112, each set of terminal posts 112 including a positive terminal post 111a and a negative terminal post 111b. Thus, the cell 11 has at least 4 terminal posts 111, which correspondingly increases the number of tabs. The multi-tab structure can reduce the internal resistance of the cell 11, improve the rate charging and discharging capability and low-temperature performance of the cell 11, thereby reducing charging time and fast charging temperature rise.

[0052] For some specific implementation methods, please refer to [link / reference]. Figure 6 Each battery cell 11 has a positive terminal 111a and a negative terminal 111b at both ends in the second direction Y. A positive terminal 111a and a negative terminal 111b located at the same end form a terminal group 112. At this time, the battery cell 11 has two terminal groups 112, and the battery cell 11 is a 4-terminal battery cell 11. Of course, in other embodiments, the number of terminal groups 112 included in the battery cell 11 is not limited. For example, the battery cell 11 may include 3 or more terminal groups 112, and the positive terminal 111a and the negative terminal 111b included in each terminal group 111 may be located at different ends of the battery cell 11.

[0053] In some embodiments, see further reference. Figure 4 The main body plate 311 has a through hole 3111 extending along the second direction Y, through which the busbar 40 is electrically connected to the terminal post 111. This arrangement serves two purposes: firstly, it facilitates the electrical connection between the busbar 40 and the terminal post 111 via the through hole 3111; secondly, the area of ​​the main body plate 311 without the through hole 3111 acts as an insulator between the busbar 40 and the battery cell 11.

[0054] Further reading Figure 4 and Figure 7The main body plate 311 is a flat plate, and the folding plate 312 includes a first connecting plate 3121 and a second connecting plate 3122 connected to each other. The end of the first connecting plate 3121 away from the second connecting plate 3122 is connected to the main body plate 311 and has an included angle. The second connecting plate 3122 is bent relative to the first connecting plate 3121 to limit the baffle 32 from the surface of the main body plate 311 along the second direction Y. With this configuration, the first connecting plate 3121, or the first connecting plate 3121 and the second connecting plate 3122 together, serves to cover the gap between the main body plate 311 and the baffle 32. The second connecting plate 3122 serves to limit the baffle 32, and the masking effect is better.

[0055] Specifically, the angle between the first connecting plate 3121 and the main body plate 311 is a right angle, and the angle between the second connecting plate 3122 and the first connecting plate 3121 is also a right angle. The baffle 32 abuts against the inner surface of the first connecting plate 3121, and the inner surface of the second connecting plate 3122 fits against the outer surface of the baffle 32 to limit the position of the baffle 32. It should be noted that the inner surface and outer surface are relative concepts; the surface of a component that is relatively inward is its inner surface, and the surface that is relatively outward is its outer surface.

[0056] It is conceivable that in other embodiments, the folding plate 312 may consist of only one connecting plate, which is connected to the main plate 311 and forms an angle with the main plate 311. This connecting plate can not only cover the gap between the main plate 311 and the baffle 32, but also limit the position of the baffle 32. In still other embodiments, the folding plate 312 may include more than two connecting plates, as long as the arrangement can cover the gap between the main plate 311 and the baffle 32 and limit the position of the baffle 32.

[0057] In some embodiments, see further reference. Figures 1-3 The battery module 100 also includes end plates 20, with two end plates 20 respectively disposed on both sides of the cell assembly 10 along the first direction X. Each end plate 20 is connected to two sets of baffle assemblies 30 on both sides along the second direction Y. In this way, the two end plates 20 and the two sets of baffle assemblies 30 jointly protect the cell assembly 10, improving the protection effect of the cell assembly 10; at the same time, the end plates 20 facilitate the installation and fixation of the baffle assemblies 30.

[0058] Optionally, both the end plate 20 and the baffle 32 are provided with screw holes, and the battery module 100 also includes fasteners that pass through the screw holes on the end plate 20 and the baffle 32 to fix the end plate 20 and the baffle 32.

[0059] It is conceivable that in other embodiments, the end plate 20 and the baffle 32 may be connected in other ways, such as by snapping them together.

[0060] See Figures 8-10 One embodiment of this application also provides a battery pack 1000, which includes a battery case 200 and the aforementioned battery module 100. The battery module 100 is disposed inside the battery case 200, with its terminal end facing the side wall of the battery case 200. Since the aforementioned battery module 100 has beneficial effects, the battery pack 1000 including the aforementioned battery module 100 has the same beneficial effects, which will not be described in detail here.

[0061] Continue reading Figure 8 and Figure 10 The battery pack 1000 also includes a first liquid cooling plate 300 and a second liquid cooling plate 400, which are respectively disposed on both sides of the battery module 100 along the third direction Z. The first liquid cooling plate 300 and the second liquid cooling plate 400 can cool the top and bottom of the battery module 100, improve the cooling rate, control the temperature rise of the entire pack, and meet the current market demand for high-rate fast charging.

[0062] In some specific embodiments, the first liquid cooling plate 300 is a bottom liquid cooling plate, and the bottom liquid cooling plate is welded to the battery box 200 to form a whole. Of course, in other embodiments, the bottom liquid cooling plate can also be connected to the battery box 200 in other ways, such as by fixing screws.

[0063] A first thermally conductive adhesive layer is provided between the first liquid cooling plate 300 and the battery module 100. On the one hand, the first liquid cooling plate 300 can be connected to the battery module 100 through the first thermally conductive adhesive layer; on the other hand, the first thermally conductive adhesive layer has a thermal conductivity effect, which is beneficial for conducting heat between the first liquid cooling plate 300 and the battery module 100, so as to facilitate the cooling of the battery module 100 by the first liquid cooling plate 300.

[0064] The second liquid cooling plate 400 is a top liquid cooling plate, and a second thermally conductive adhesive layer is provided between the second liquid cooling plate 400 and the battery module 100. On the one hand, the second liquid cooling plate 400 can be connected to the battery module 100 through the second thermally conductive adhesive layer; on the other hand, the second thermally conductive adhesive layer has a thermal conductivity effect, which is beneficial for conducting heat between the second liquid cooling plate 400 and the battery module 100, so as to facilitate the cooling of the battery module 100 by the second liquid cooling plate 400.

[0065] Generally, the battery box 200 is higher than the battery module 100 to ensure that the thermal conductive adhesive will not overflow outside the battery box 200 when it is poured into the top of the battery module 100.

[0066] In some embodiments, see Figure 11Each battery cell 11 has an explosion-proof valve 113 on one side along the third direction Z, and the explosion-proof valves 113 are arranged sequentially along the first direction X. Specifically, the explosion-proof valve 113 is located on the top of the battery cell 11 along the third direction Z. The battery pack 1000 also includes a baffle strip 500 extending along the first direction X, with two baffle strips 500 respectively positioned opposite each other on both sides of the explosion-proof valve 113 along the second direction Y. By setting the baffle strips 500, when thermally conductive adhesive is poured into the top of the battery module 100, the thermally conductive adhesive will not flow to the explosion-proof valve 113 and block the explosion-proof valve 113, thus ensuring the explosion-proof effect of the explosion-proof valve 113.

[0067] It should be noted that when the thermally conductive adhesive is poured into the top of the battery module 100, the thermally conductive adhesive can also flow to the gap between the battery module 100 and the battery box 200 to fill the gap between the battery module 100 and the battery box 200.

[0068] The battery pack 1000 also includes a cover plate 60, which covers the top of the battery box 200 to form a receiving space together with the battery box 200 to protect the battery module 100, the first liquid cooling plate 300 and the second liquid cooling plate 400 located therein.

[0069] Another embodiment of this application provides an electrical device including the battery pack 1000 described above. Since the battery pack 1000 has beneficial effects, the electrical device including the battery pack 1000 also has the same beneficial effects, which will not be described in detail here.

[0070] Optionally, the electrical device is a vehicle, which can be a gasoline vehicle, a natural gas vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended vehicles, etc.

[0071] It is worth noting that, for pure electric vehicles, the aforementioned batteries can serve as a driving power source, thereby replacing fossil fuels to provide driving power.

[0072] In other embodiments, the type of electrical device is not limited. For example, the electrical device can also be a ship, spacecraft, electric toy, power tool, energy storage device, amusement equipment, elevator, and lifting equipment, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc.; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, or electric airplane toys, etc.; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.; energy storage devices can be energy storage walls, base station energy storage, container energy storage, etc.; amusement equipment can be a carousel, a drop tower, etc. This application does not impose any special limitations on the above-mentioned electrical devices.

[0073] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A battery module, characterized by, include: A battery cell assembly (10) includes a plurality of battery cells (11) arranged along a first direction (X), wherein at least one end of the battery cell assembly (10) along a second direction (Y) forms an electrode end with an electrode post (111), wherein the first direction (X) is the length direction of the battery module and the second direction (Y) is the width direction of the battery module. Two sets of baffle assemblies (30) are respectively disposed on both sides of the battery cell assembly (10) along the second direction (Y); The baffle assembly (30) located near the end of the electrode post includes an isolation plate (31) and a baffle (32). The isolation plate (31) includes a main plate (311) and folding plates (312) disposed at both ends of the main plate (311) along a third direction (Z). The main plate (311) is located between the baffle (32) and the cell assembly (10). A busbar (40) electrically connected to the electrode post (111) is sandwiched between the main plate (311) and the baffle (32). The folding plate (312) is folded relative to the main plate (311) and limits at least a portion of the surface of the baffle (32) facing away from the main plate (311) along the second direction (Y). The third direction (Z) is the height direction of the battery module.

2. The battery module according to claim 1, characterized in that, Each of the battery cells (11) has a terminal post (111) on both sides in the second direction (Y), and the battery cell group (10) has the terminal post end on both sides in the second direction (Y).

3. The battery module of claim 2, wherein, Each of the battery cells (11) has multiple sets of terminals (112), each set of terminals (112) including a positive terminal (111a) and a negative terminal (111b).

4. The battery module of claim 1, wherein, The main plate (311) has a through hole (3111) extending along the second direction (Y), and the busbar (40) is electrically connected to the pole (111) through the through hole (3111); and / or The battery module also includes a circuit board (50) extending along the first direction (X), the circuit board (50) being sandwiched between the baffle (32) and the main body plate (311) and electrically connected to the busbar (40).

5. The battery module of claim 1, wherein, The main body plate (311) is a flat plate, and the folding plate (312) includes a first connecting plate (3121) and a second connecting plate (3122) connected to each other. The end of the first connecting plate (3121) away from the second connecting plate (3122) is connected to the main body plate (311) and has an included angle. The second connecting plate (3122) is bent relative to the first connecting plate (3121) to limit the surface of the baffle (32) facing away from the main body plate (311) in the second direction (Y). and / or The battery module also includes two end plates (20), which are respectively disposed on both sides of the cell group (10) along the first direction (X), and each end plate (20) is connected to two sets of baffle assemblies (30) on both sides along the second direction (Y).

6. A battery pack, characterized by, It includes a battery box (200) and a battery module as described in any one of claims 1-5, wherein the battery module is disposed inside the battery box (200) and the terminal end of the battery module is disposed facing the side wall of the battery box (200).

7. The battery pack of claim 6, wherein, The battery pack also includes a first liquid cooling plate (300) and a second liquid cooling plate (400), which are respectively disposed on both sides of the battery module along the third direction (Z).

8. The battery pack of claim 7, wherein, A first thermally conductive adhesive layer is provided between the first liquid cooling plate (300) and the battery module; and / or A second thermally conductive adhesive layer is provided between the second liquid cooling plate (400) and the battery module.

9. The battery pack of claim 6, wherein, The battery cell (11) has an explosion-proof valve (113) on one side along the third direction (Z), and each of the explosion-proof valves (113) is arranged sequentially along the first direction (X); The battery pack also includes a baffle strip (500) extending along the first direction (X), and two baffle strips (500) are respectively disposed opposite to each other on both sides of the explosion-proof valve (113) along the second direction (Y).

10. An electrical device, characterized by Includes the battery pack as described in any one of claims 6-9.

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