Battery module and electric equipment

Abstract

The utility model provides a battery module and electric equipment, and relates to the field of battery modules, the battery module comprises a battery cell group and a liquid leakage detection device, the liquid leakage detection device is arranged at one end of a pole far away from the battery cell group, the liquid leakage detection device comprises a first conductive part, a second conductive part and a detection part, the first conductive part is provided with a first diversion area, and the second conductive part is provided with a second diversion area; the projection plane of the first conductive part at least partially coincides with the projection plane of the battery cell group, the second conductive part and the first conductive part are oppositely arranged, the second conductive part is arranged on the side, away from the battery cell group, of the first conductive part, and the second conductive part and the first conductive part define a containing space; the detection member is connected with the first conductive member and the second conductive member, and is used for detecting a preset potential difference between the first conductive member and the second conductive member. According to the invention, liquid leakage can be detected by the liquid leakage detection device once liquid leakage occurs in the battery cell group, so that the liquid leakage detection speed is increased, and the safety performance is enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of battery modules, in particular to a battery module and a power consumption device. BACKGROUND

[0002] The main function of the battery module is to connect multiple battery cells into a whole, providing greater electrical energy storage capacity and output power. At the same time, it also has the characteristics of structural modularization, easy assembly and maintenance, and certain safety protection function.

[0003] The related battery module cannot detect the leakage of the battery cell in time when the battery cell leaks, and has great safety hazards. CONTENT OF THE UTILITY MODEL

[0004] In order to overcome the deficiencies in the prior art, the present application provides a battery module and a power consumption device.

[0005] In a first aspect, the present application provides a battery module, comprising a battery cell group and a leakage detection device, the leakage detection device is arranged at one end away from the pole of the battery cell group, the leakage detection device comprises a first conductive part, a second conductive part and a detection part, the first conductive part is provided with a first flow area, and the projection surface of the first conductive part at least partially coincides with the projection surface of the battery cell group, the second conductive part is arranged opposite to the first conductive part, the second conductive part is arranged on the side of the first conductive part away from the battery cell group, and the second conductive part and the first conductive part define a containing space, the detection part is connected with the first conductive part and the second conductive part, and is used for detecting the preset potential difference between the first conductive part and the second conductive part.

[0006] In combination with the first aspect, in a possible implementation manner, the battery module further comprises a partition, the partition is arranged in the containing space, and the partition is provided with a second flow area, the electrolyte leaked from the battery cell group can flow to the second conductive part through the first flow area and the second flow area in sequence, so that the first conductive part and the second conductive part are electrically connected, and the preset potential difference is generated, and the preset potential difference is 0.1V-4.37V.

[0007] In combination with the first aspect, in a possible implementation manner, the projection surface of the first conductive part at least partially coincides with the projection surface of the partition, and the partition comprises a first contact surface and a second contact surface, the first contact surface at least partially contacts the first conductive part, and the second contact surface at least partially contacts the second conductive part.

[0008] With reference to the first aspect, in a possible implementation of the first aspect, the battery module further includes a connecting piece, the connecting piece includes at least two connecting lines, the at least two connecting lines include a first connecting line and a second connecting line, the first connecting line connects the first conductive piece and the detection piece, so that the first conductive piece and the detection piece are electrically connected, and the second connecting line connects the second conductive piece and the detection piece, so that the second conductive piece and the detection piece are electrically connected.

[0009] With reference to the first aspect, in a possible implementation of the first aspect, the detection piece includes a first output end and a second output end, two ends of the first connecting line are connected to the first conductive piece and the first output end respectively, and two ends of the second connecting line are connected to the second conductive piece and the second output end respectively.

[0010] With reference to the first aspect, in a possible implementation of the first aspect, the first conductive piece is provided with a plurality of first flow areas, the battery cell group includes at least one row of battery monomers, and each of the first flow areas is arranged corresponding to at least one row of the battery monomers, and the liquid leakage detection device is used for detecting electrolyte seepage from any one of the battery monomers.

[0011] With reference to the first aspect, in a possible implementation of the first aspect, the partition piece is arranged opposite to the first conductive piece, the partition piece is provided with a plurality of second flow areas, and each of the second flow areas is arranged corresponding to at least one of the first flow areas.

[0012] With reference to the first aspect, in a possible implementation of the first aspect, each of the battery monomers is detachably connected, each of the battery monomers is provided with at least two pole columns, the at least two pole columns include a first pole column and a second pole column, and the battery module further includes at least two rows of aluminum rows, the at least two rows of aluminum rows include a first aluminum row and a second aluminum row, the first aluminum row is arranged on each of the first pole columns to connect adjacent two of the first pole columns, the second aluminum row is arranged on each of the second pole columns to connect adjacent two of the second pole columns, and a conductive coating is arranged between the first aluminum row and each of the first pole columns and between the second aluminum row and each of the second pole columns.

[0013] With reference to the first aspect, in a possible implementation of the first aspect, the preset potential difference is 0.4V-2.015V, the detection piece is used to send a liquid leakage indication signal when the preset potential difference is detected, and the battery module further includes a prompt piece, the prompt piece is connected to the detection piece, and the prompt piece is used to receive the liquid leakage indication signal and send an alarm prompt.

[0014] The second aspect of the application provides a kind of electric equipment, including the battery module described above.

[0015] Compared with the prior art, the application has the beneficial effects of:

[0016] The battery module provided by the application can isolate the first conductive part and the second conductive part when the battery cell group does not leak liquid, so that the first conductive part and the second conductive part are insulated and isolated, that is, there is no potential difference between the first conductive part and the second conductive part. When the electrolyte seeps out of the battery cell group, the electrolyte can flow to the accommodation space along the first flow area, so that the first conductive part and the second conductive part are electrically connected and a preset potential difference is generated. The detection part is used to detect the preset potential difference, that is, when the battery cell group leaks liquid, the liquid leakage detection device can detect the liquid leakage, the speed of liquid leakage detection is improved, and the safety performance is enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings needed in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some of the embodiments of the application, and therefore should not be considered as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0018] Figure 1 An overall structural schematic diagram of the battery cell module is shown.

[0019] Figure 2 Another angle structural schematic diagram of the battery cell module is shown.

[0020] Figure 3 An exploded structural schematic diagram of the battery cell module is shown.

[0021] Figure 4 A structural schematic diagram of the battery monomer of the battery cell module is shown.

[0022] Main element symbol explanation:

[0023] 100-battery cell group; 110-battery monomer; 120-pole; 121-first pole; 122-second pole;

[0024] 200-liquid leakage detection device; 210-first conductive part; 220-second conductive part;

[0025] 300-fixing assembly; 310-end plate; 320-steel belt;

[0026] 400-aluminum row; 410-first aluminum row; 420-second aluminum row;

[0027] 500-heat insulation part;

[0028] 600-separation part;

[0029] 700 - connector. DETAILED DESCRIPTION

[0030] Embodiments of the present application are described below in detail with reference to examples illustrated in the accompanying drawings, in which like or similar elements or components are denoted throughout by like reference numbers, and descriptions of which need not be repeated. The embodiments described below are examples only, and are not to be construed as limiting the present application.

[0031] In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is merely for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the present application.

[0032] In addition, the terms "first", "second", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or a specific number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0033] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] In the present application, unless specifically and expressly defined otherwise, a first feature is "on" or "under" a second feature can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature is "over", "above" and "on top of" the second feature can mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. The first feature is "under", "below" and "underneath" the second feature can mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is horizontally lower than the second feature.

[0035] Referring to Figure 1 and Figure 2 , the present application provides a battery module, which comprises a battery cell group 100 and a liquid leakage detection device 200. The liquid leakage detection device 200 is arranged away from one end of a pole 120 of the battery cell group 100. The liquid leakage detection device 200 comprises a first conductive member 210, a second conductive member 220 and a detection member. The first conductive member 210 is provided with a first flow guide area, and a projection surface of the first conductive member 210 at least partially coincides with a projection surface of the battery cell group 100. The second conductive member 220 is arranged opposite to the first conductive member 210, and is arranged on a side of the first conductive member 210 away from the battery cell group 100. The second conductive member 220 and the first conductive member 210 define a containing space. The detection member is connected to the first conductive member 210 and the second conductive member 220, and is used for detecting a preset potential difference between the first conductive member 210 and the second conductive member 220. When the battery cell group 100 does not leak, the containing space serves to isolate the first conductive member 210 and the second conductive member 220, so that the first conductive member 210 and the second conductive member 220 are insulated and isolated, i.e. there is no potential difference between the first conductive member 210 and the second conductive member 220. When electrolyte seeps out of the battery cell group 100, the electrolyte can flow along the first flow guide area into the containing space, so that the first conductive member 210 and the second conductive member 220 are electrically connected and a preset potential difference is generated. The detection member is used for detecting the preset potential difference, so that the liquid leakage detection device 200 can detect the liquid leakage of the battery cell group 100 as soon as the liquid leakage occurs, thereby improving the speed of liquid leakage detection and enhancing the safety performance.

[0036] Referring to Figure 3 In some embodiments, the battery cell group 100 comprises a row of battery monomers 110. Each battery monomer 110 contains electrolyte, and the battery monomers 110 are arranged along a first preset direction. The battery monomers 110 are detachably connected. Figure 3 The first preset direction is the X direction in

[0037] In other embodiments, the battery monomer 110 can also be adjusted to two rows, three rows, four rows, five rows, etc. according to actual needs, which will not be enumerated here.

[0038] Please refer to Figure 2 and Figure 3 In some embodiments, the battery module further comprises a fixing assembly 300. The fixing assembly 300 comprises an end plate 310 and a steel belt 320. The end plate 310 is arranged on both sides of the battery cell group 100 to bind each battery monomer 110, which can effectively improve the swelling phenomenon of each battery monomer 110. The steel belt 320 is arranged around the periphery of the battery cell group 100 to form a ring-shaped restraint for the end plate 310 and each battery monomer 110, thereby further enhancing the binding force of each battery monomer 110 and the end plate 310, so as to effectively resist the thermal expansion of the battery cell group 100 during operation and ensure the electrical performance of the battery cell group 100.

[0039] In some embodiments, the end plate 310 and the battery cell group 100 are detachably connected. The steel belt 320 and the end plate are detachably connected, the number of the steel belt 320 is two, and the two steel belts 320 are oppositely arranged.

[0040] It can be understood that through the cooperation of the end plate 310 and the steel belt 320, on the one hand, each battery monomer 110 can be limited and bound, compared with one steel belt 320, two steel belts 320 can improve the tensile strength, so as to effectively prevent each battery monomer 110 from breaking two steel belts 320 due to excessive expansion force at the end of the cycle life, and two oppositely arranged steel belts 320 can restrain both ends of each battery monomer 110, thereby maintaining balanced binding of each battery monomer 110. On the other hand, the end plate 310 and the steel belt 320 are detachably connected with each battery monomer 110, so that each battery monomer 110 can be detachably connected. Compared with the traditional way of connecting each battery monomer 110 by welding, the battery module in the application connects each battery monomer 110 through a detachable structure, which improves the convenience of disassembly and assembly of each battery monomer 110, improves the replacement speed of each battery monomer 110, and improves the secondary recycling efficiency of each battery monomer 110, and improves the recycling rate.

[0041] Please refer to Figure 1 and Figure 4In some embodiments, two poles 120 are arranged on each battery cell 110. The two poles 120 are arranged on the battery cell 110 along a second preset direction, and the two poles 120 include a first pole 121 and a second pole 122. The second preset direction is the Y direction in the above-mentioned figure, and the second preset direction is perpendicular to the first preset direction. Figure 3

[0042] In other embodiments, the number of poles 120 on each battery cell 110 can also be three, four, five, six, and the like, which will not be enumerated here.

[0043] Please refer to Figure 1 and Figure 2 In some embodiments, the battery module further includes two rows of aluminum rows 400. The two rows of aluminum rows 400 include a first aluminum row 410 and a second aluminum row 420. The first aluminum row 410 is arranged on each first pole 121 to connect two adjacent first poles 121. The second aluminum row 420 is arranged on each second pole 122 to connect two adjacent second poles 122.

[0044] In some embodiments, the first aluminum row 410 and the first pole 121 are connected by a bolt connector 700, so that the first aluminum row 410 and the first pole 121 can be detachably connected. The second aluminum row 420 and the second pole 122 are connected by a bolt connector 700, so that the second aluminum row 420 and the second pole 122 can be detachably connected.

[0045] It can be understood that the number of aluminum rows 400 is equal to the number of poles 120 on each battery cell 110, and the connection stability between the aluminum row 400 and the pole 120 can be improved by connecting the aluminum row 400 and the pole 120 by a plurality of bolt connectors 700. The problem of poor connection of each battery cell 110 and large internal resistance of the battery module caused by loosening of the aluminum row 400 during transportation and use of the battery module can be improved, and the electrical performance of the battery module can be improved.

[0046] In some embodiments, the battery module further includes a conductive coating. The conductive coating is arranged between the first aluminum row 410 and the first pole 121, and between the second aluminum row 420 and the second pole 122, so as to increase the conductive contact surface between the aluminum row 400 and the pole 120, thereby improving the problem of increased contact resistance caused by poor contact between the aluminum row 400 and the pole 120.

[0047] Please refer to Figure 3 ​In some embodiments, the battery module further comprises a heat insulating member 500. The heat insulating member 500 is arranged between two adjacent battery cells 110 to insulate the two adjacent battery cells 110, and the heat insulating member 500 is provided with air ducts to accelerate the heat dissipation of the battery cells 110 and improve the electrical performance of the battery cells 110.

[0048] In some embodiments, the conductive coating is a conductive paste. The heat insulating member 500 is EVA foam.

[0049] Please refer to Figure 3 In some embodiments, the battery module further comprises a partition member 600. The partition member 600 is arranged in the accommodation space, and the partition member 600 is provided with a second flow guide area.

[0050] It can be understood that the electrolyte leaked from any one of the battery cells 110 can flow to the second conductive member 220 through the first flow guide area and the second flow guide area in sequence, so that the first conductive member 210 and the second conductive member 220 generate the preset potential difference, that is, the leakage detection device 200 can detect the electrolyte leaked from any one of the battery cells 110.

[0051] In some embodiments, the projection surface of the first conductive member 210 coincides with the projection surface of the partition member 600. The partition member 600 comprises a first contact surface and a second contact surface. The first contact surface is in contact with the first conductive member 210. The second contact surface is in contact with the second conductive member 220, that is, the partition member 600 is arranged opposite to the first conductive member 210.

[0052] In some embodiments, the partition member 600 is made of insulating material, such as any one of PE material, PP material, and PE-PP composite material.

[0053] In some embodiments, the first conductive member 210 is provided with a plurality of first flow guide areas. Each first flow guide area corresponds to an array of battery cells 110. The second conductive member 220 is provided with a plurality of second flow guide areas. Each second flow guide area corresponds to a first flow guide area.

[0054] In some embodiments, each first flow guide area is provided with a first flow channel, and each second flow guide area is provided with a second flow channel. The second flow channel communicates with the first flow channel.

[0055] It can be understood that the electrolyte seeping from any one of the battery monomers 110 can flow to the second conductive member 220 through the first flow channel and the second flow channel in sequence, so that the first conductive member 210 and the second conductive member 220 generate the preset potential difference.

[0056] In some embodiments, the first flow channel and the second flow channel can be set as a hole structure in a cylindrical shape, a prismatic shape, a pyramid shape, etc. according to actual needs.

[0057] In some embodiments, the first conductive member 210 includes a first insulating layer and a first metal foil layer. The first insulating layer is arranged at one end of each battery monomer 110 away from the pole 120, the first metal foil layer is arranged on a side of the first insulating layer away from each battery monomer 110, and the first metal foil layer is attached to the first insulating layer. The second conductive member 220 includes a second PET layer and a second metal foil layer. The second insulating layer is arranged on a side of the first metal foil layer away from the first insulating layer, the second metal foil layer is arranged on the second insulating layer, the second metal foil layer is located between the first metal foil layer and the second insulating layer, and the second metal foil layer has a preset spacing from the first metal foil layer to define the accommodation space.

[0058] In some embodiments, the first metal foil layer is any one of a copper foil, a gold foil, a silver foil, a tin foil, a molybdenum foil, and a nickel foil. The second metal foil layer is any one of an aluminum foil, a calcium foil, a manganese foil, a niobium foil, a zinc foil, a cadmium foil, and a chromium foil. By forming the first conductive member 210 and the second conductive member 220 in the form of a PET single-sided conductive metal foil plating, the detection cost can be reduced compared with a conventional water immersion sensor.

[0059] In some embodiments, the first contact surface is in contact with the first metal foil layer, and the second contact surface is attached to the second metal foil layer.

[0060] It can be understood that the separator 600 plays a role of insulation when each battery monomer 110 does not leak liquid, so as to insulate and separate the first conductive member 210 and the second conductive member 220. When any one of the battery monomers 110 leaks liquid, the separator 600 plays a role of conduction, so that the electrolyte falls on the second metal foil layer along the second flow channel on the separator 600, and the first metal foil layer and the second metal foil layer are electrically connected.

[0061] Please refer to Figure 1 and Figure 3In some embodiments, the battery module further comprises a connecting member 700. The connecting member 700 comprises two connecting lines. The two connecting lines comprise a first connecting line and a second connecting line. The first connecting line connects the first metal foil layer and the detecting member, so that the first metal foil layer and the detecting member are electrically connected. The second connecting line connects the second metal foil layer and the detecting member, so that the second metal foil layer and the detecting member are electrically connected.

[0062] In other embodiments, the number of connecting lines can also be three, four, five, six, and so on, which will not be listed here.

[0063] In some embodiments, the detecting member comprises a first output end and a second output end. One end of the first connecting line is connected to the first metal foil layer by ultrasonic welding, and the other end of the first connecting line is connected to the first output end. One end of the second connecting line is connected to the second metal foil layer by ultrasonic welding, and the other end of the second connecting line is connected to the second output end.

[0064] In some embodiments, the connecting member 700 is a flexible circuit board. The detecting member is a voltage detector, and the detecting member is connected to the battery management system of the battery module. The first output end is a positive output end. The second output end is a negative output end.

[0065] In some embodiments, the preset potential difference is 0.1V-4.37V. The detecting member sends a liquid leakage indication signal when the preset potential difference is detected.

[0066] It should be noted that the minimum potential difference that can be detected by the detecting member is 0.1V. When the first metal foil layer and the second metal foil layer are neither copper foil nor aluminum foil, and the battery monomer 110 leaks, the preset potential difference can reach 4.37V.

[0067] Further, the preset potential difference is 0.4V-2.015V.

[0068] In some embodiments, the battery module further comprises a prompting member. The prompting member is connected to the detecting member, and the prompting member is used to receive the liquid leakage indication signal and send an alarm reminder. The alarm reminder includes audible and visual alarm reminder, telephone reminder, short message reminder, and other reminder methods.

[0069] Compared with the connection by welding, the battery monomer 110 in the application is connected through a detachable connection structure, which can improve the convenience of disassembly and assembly of the battery monomers 110, and when the battery monomer 110 leaks, the battery monomer 110 leaking liquid can be replaced faster, the replacement speed of the battery monomers 110 is improved, and the secondary recycling efficiency of the battery monomers 110 is improved. The electrolyte seeping from the any one or more battery monomers 110 can flow to the second conductive piece 220 through the first flow channel and the second flow channel in sequence, so that the first conductive piece 210 and the second conductive piece 220 are conductive and generate the preset potential difference, and the detection piece can timely send the liquid leakage indication signal when detecting the preset potential difference. The prompt piece can receive the liquid leakage indication signal and send an alarm reminder, so as to timely remind the user. The battery module in the application can timely send the liquid leakage indication signal when any one or more battery monomers 110 leak, improve the speed of the battery monomer 110 liquid leakage detection, and enhance the safety performance of the battery module.

[0070] The application further provides a power utilization device (not shown in the figure), which can be an energy storage device or an energy consumption device. The power utilization device includes the battery module in any one of the above embodiments, and thus has all the beneficial effects of the battery module in any one of the above embodiments, which will not be described here.

[0071] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the different embodiments or examples described in the present application and the features of the different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0072] Although the embodiments of the application have been shown and described above, it should be understood that the above embodiments are exemplary and cannot be understood as limiting the application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the application.

Claims

1. A battery module, characterized by, The battery module comprises: an electric core group (100); a leakage detection device (200) arranged at one end away from a pole (120) of the electric core group (100), the leakage detection device (200) comprising a first conductive member (210), a second conductive member (220) and a detection member; the first conductive member (210) is provided with a first flow guide area, and a projection surface of the first conductive member (210) at least partially coincides with a projection surface of the electric core group (100); the second conductive member (220) is arranged opposite to the first conductive member (210), and the second conductive member (220) is arranged on a side of the first conductive member (210) away from the electric core group (100), and the second conductive member (220) and the first conductive member (210) define a containing space; the detection member is connected to the first conductive member (210) and the second conductive member (220), and is used for detecting a preset potential difference between the first conductive member (210) and the second conductive member (220).

2. The battery module of claim 1, wherein, The battery module further comprises: a partition member (600) arranged in the containing space, and the partition member (600) is provided with a second flow guide area, and electrolyte seeping from the electric core group (100) can flow to the second conductive member (220) through the first flow guide area and the second flow guide area in sequence, so that the first conductive member (210) and the second conductive member (220) are electrically connected, and the preset potential difference is generated, and the preset potential difference is 0.1V-4.37V.

3. The battery module of claim 2, wherein, The projection surface of the first conductive member (210) at least partially coincides with a projection surface of the partition member (600), and the partition member (600) comprises a first contact surface and a second contact surface, the first contact surface at least partially contacts the first conductive member (210), and the second contact surface at least partially contacts the second conductive member (220).

4. The battery module of claim 1, wherein, The battery module further comprises a connecting member (700) comprising at least two connecting lines, the at least two connecting lines comprising: a first connecting line connecting the first conductive member (210) and the detection member, so that the first conductive member (210) and the detection member are electrically connected; a second connecting line connecting the second conductive member (220) and the detection member, so that the second conductive member (220) and the detection member are electrically connected.

5. The battery module of claim 4, wherein, The detection member comprises a first output end and a second output end, two ends of the first connecting line are respectively connected to the first conductive member (210) and the first output end, and two ends of the second connecting line are respectively connected to the second conductive member (220) and the second output end.

6. The battery module of claim 2, wherein, The first conductive member (210) is provided with a plurality of first flow guide areas, the battery cell group (100) comprises at least one row of battery monomers (110), and each first flow guide area is provided with at least one row of battery monomers (110), and the leakage detection device (200) is used for detecting the electrolyte seeping from any one of the battery monomers (110).

7. The battery module of claim 2, wherein, The separator (600) is arranged opposite to the first conductive member (210), the separator (600) is provided with a plurality of second flow guide areas, and each second flow guide area is provided with at least one first flow guide area.

8. The battery module of claim 6, wherein, The battery monomers (110) are detachably connected, each battery monomer (110) is provided with at least two pole columns (120), the at least two pole columns (120) comprise a first pole column (121) and a second pole column (122), and the battery module further comprises: at least two rows of aluminum rows (400), the at least two rows of aluminum rows (400) comprise: A first aluminum row (410) is arranged on each first pole column (121) to connect adjacent two first pole columns (121); A second aluminum row (420) is arranged on each second pole column (122) to connect adjacent two second pole columns (122), and a conductive coating is arranged between the first aluminum row (410) and each first pole column (121) and between the second aluminum row (420) and each second pole column (122).

9. The battery module of any one of claims 2-8, wherein, The preset potential difference is 0.4V-2.015V, the detection member is used for sending a leakage indication signal when the preset potential difference is detected, and the battery module further comprises: A prompt member connected with the detection member, and the prompt member is used for receiving the leakage indication signal and sending an alarm prompt.

10. An electric device, characterized by The electric device comprises the battery module in any one of claims 1-9.

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