Battery cell assembly, battery pack and power utilization device

Abstract

The utility model discloses a battery cell assembly, a battery pack and a power utilization device, relates to the technical field of batteries, and is used for solving the problem of low safety of the battery cell assembly. The battery cell assembly comprises a plurality of first battery cells, a plurality of second battery cells, a first exhaust part and a second exhaust part, the multiple first battery cells and the multiple second battery cells are sequentially and alternately stacked in the first direction, the first battery cells are provided with first pressure relief pieces, and the second battery cells are provided with second pressure relief pieces. The first pressure relief piece and the second pressure relief piece are arranged at intervals in the second direction. The first exhaust part extends in the first direction and is provided with a plurality of first exhaust holes, and the plurality of first exhaust holes are opposite to and communicated with the first pressure relief parts of the plurality of first battery cells respectively. The second exhaust part extends along the first direction and is provided with a plurality of second exhaust holes, and the plurality of second exhaust holes are respectively opposite to and communicated with the second pressure relief parts of the plurality of second battery cells. The battery cell assembly disclosed by the utility model can be used for providing a power supply.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery cell assembly, a battery pack and an electric device. Background Art

[0002] As the power source of an electric device, a power battery is one of the important components of the electric device, and the safety of the power battery is particularly important. However, in the prior art, the safety of power batteries is relatively low. Summary of the Utility Model

[0003] This application provides a battery cell assembly, a battery pack and an electric device, which are used to solve the problem of low safety of the battery cell assembly.

[0004] To achieve the above object, this application adopts the following technical solutions:

[0005] In a first aspect, an embodiment of this application provides a battery cell assembly, which includes a plurality of first battery cells, a plurality of second battery cells, a first exhaust member and a second exhaust member.

[0006] The plurality of first battery cells and the plurality of second battery cells are alternately and stacked in sequence along a first direction. The first battery cells are provided with first pressure relief members, and the second battery cells are provided with second pressure relief members. The first pressure relief members of the plurality of first battery cells are located on the same surface of the plurality of first battery cells, and the second pressure relief members of the plurality of second battery cells are located on the same surface of the plurality of second battery cells. Moreover, the first pressure relief members of the plurality of first battery cells are arranged in a row along the first direction, and the second pressure relief members of the plurality of second battery cells are arranged in a row along the first direction. The first pressure relief members and the second pressure relief members are spaced apart along a second direction. Wherein, the second direction is perpendicular to the first direction.

[0007] The first exhaust member extends along the first direction, and the first exhaust member is provided with a plurality of first exhaust holes, and the plurality of first exhaust holes are respectively opposite to and communicated with the first pressure relief members of the plurality of first battery cells. The second exhaust member extends along the first direction, and the second exhaust member is provided with a plurality of second exhaust holes, and the plurality of second exhaust holes are respectively opposite to and communicated with the second pressure relief members of the plurality of second battery cells.

[0008] It can be understood that by providing the first exhaust member and the second exhaust member in this application, the plurality of first battery cells and the plurality of second battery cells can be respectively communicated, providing different exhaust paths for the plurality of first battery cells and the plurality of second battery cells. In this way, if a thermal runaway problem occurs in the battery cell assembly, adjacent first battery cells and second battery cells can exhaust through different exhaust members, which can improve the exhaust efficiency of the battery cell assembly, and then quickly discharge the heat generated inside the battery cell assembly, avoiding the occurrence of more serious safety problems and improving the safety of the battery cell assembly.

[0009] Meanwhile, the first exhaust member and the second exhaust member are arranged to extend along the first direction, which will not impede the gas generated by the thermal runaway of the battery cell assembly, enabling smoother exhaust and further improving the exhaust efficiency.

[0010] In some embodiments, the two ends of the first battery cell along the second direction are respectively the positive electrode end and the negative electrode end. The two ends of the second battery cell along the second direction are respectively the positive electrode end and the negative electrode end. The direction from the positive electrode end to the negative electrode end of the first battery cell is opposite to the direction from the positive electrode end to the negative electrode end of the second battery cell. Along the second direction, the distance from the first pressure relief member to the positive electrode end of the first battery cell is equal to the distance from the second pressure relief member to the positive electrode end of the second battery cell.

[0011] In some embodiments, the first battery cell is further provided with a third pressure relief member. The third pressure relief member and the first pressure relief member are located on the same side wall of the first battery cell, and the third pressure relief member and the first pressure relief member are spaced apart along the second direction. The second battery cell is further provided with a fourth pressure relief member. The fourth pressure relief member and the second pressure relief member are located on the same side wall of the second battery cell, and the fourth pressure relief member and the second pressure relief member are spaced apart along the second direction. The third pressure relief members of multiple first battery cells are arranged in a row along the first direction, and the fourth pressure relief members of multiple second battery cells are arranged in a row along the first direction. The third pressure relief member and the fourth pressure relief member are spaced apart along the second direction.

[0012] The battery cell assembly further includes a third exhaust member and a fourth exhaust member. The third exhaust member extends along the first direction, and the third exhaust member is provided with a plurality of third exhaust holes, and the plurality of third exhaust holes are respectively opposite to and communicated with the plurality of third pressure relief members. The fourth exhaust member extends along the first direction, and the fourth exhaust member is provided with a plurality of fourth exhaust holes, and the plurality of fourth exhaust holes are respectively opposite to and communicated with the plurality of fourth pressure relief members.

[0013] In some embodiments, the two ends of the first battery cell along the second direction are respectively the positive electrode end and the negative electrode end. The two ends of the second battery cell along the second direction are respectively the positive electrode end and the negative electrode end. The direction from the positive electrode end to the negative electrode end of the first battery cell is opposite to the direction from the positive electrode end to the negative electrode end of the second battery cell. Along the second direction, the distance from the third pressure relief member to the positive electrode end of the first battery cell is equal to the distance from the fourth pressure relief member to the positive electrode end of the second battery cell.

[0014] In some embodiments, both the first battery cell and the second battery cell are in the shape of a rectangular plate, and the thickness directions of the first battery cell and the second battery cell are both consistent with the first direction. The length directions of the first battery cell and the second battery cell are both consistent with the second direction.

[0015] In some embodiments, a first protective member is provided at the first exhaust hole. The first protective member is configured to open the first exhaust hole when the pressure from the outside is greater than or equal to a first preset threshold. The first preset threshold is less than the bursting threshold of the first pressure relief member. And / or, a second protective member is provided at the second exhaust hole. The second protective member is configured to open the second exhaust hole when the pressure from the outside is greater than or equal to a second preset threshold. The second preset threshold is less than the bursting threshold of the second pressure relief member.

[0016] In some embodiments, the first protective member is in a sheet shape and covers the first exhaust hole. The first protective member is configured to rupture to open the first exhaust hole when the pressure from the outside is greater than or equal to the first preset threshold. And / or, the second protective member is in a sheet shape and covers the second exhaust hole. The second protective member is configured to rupture to open the second exhaust hole when the pressure from the outside is greater than or equal to the second preset threshold.

[0017] In some embodiments, the first exhaust member includes a first exhaust passage, and the first exhaust hole communicates with the first exhaust passage. A first sunk groove is provided on the inner wall surface of the first exhaust passage. The opening of the end of the first exhaust hole communicating with the first exhaust passage is located on the bottom surface of the first sunk groove, and at least a part of the first protective member is received in the first sunk groove. And / or, the second exhaust member includes a second exhaust passage, and the second exhaust hole communicates with the second exhaust passage. A second sunk groove is provided on the inner wall surface of the second exhaust passage. The opening of the end of the second exhaust hole communicating with the second exhaust passage is located on the bottom surface of the second sunk groove, and at least a part of the second protective member is received in the second sunk groove.

[0018] In some embodiments, both ends of the first exhaust passage penetrate through the first exhaust member and respectively form a first opening and a second opening, and one of the first opening and the second opening communicates with the air outlet of the air-cooling system. And / or, both ends of the second exhaust passage penetrate through the second exhaust member and respectively form a third opening and a fourth opening, and one of the third opening and the fourth opening communicates with the air outlet of the air-cooling system.

[0019] In some embodiments, a first switch valve port is provided at the first opening, and a second switch valve port is provided at the second opening. The battery cell assembly further includes a smoke sensor and a controller. The smoke sensor is disposed in the first exhaust passage. The controller is electrically connected to the first switch valve port, the second switch valve port, and the smoke sensor. The controller is configured to control the opening or closing of the first switch valve port and the second switch valve port according to the detection value of the smoke sensor. And / or, a third switch valve port is provided at the third opening, and a fourth switch valve port is provided at the fourth opening. The battery cell assembly further includes a smoke sensor and a controller. The smoke sensor is disposed in the second exhaust passage. The controller is electrically connected to the third switch valve port, the fourth switch valve, and the smoke sensor. The controller is configured to control the opening or closing of the third switch valve port and the fourth switch valve port according to the detection value of the smoke sensor.

[0020] In a second aspect, an embodiment of the present application provides a battery pack, including a plurality of the above-mentioned battery cell assemblies.

[0021] In a third aspect, an embodiment of the present application provides an electrical device, including: an electrical appliance device and the above-mentioned battery pack, where the battery pack is installed on the electrical appliance device. Alternatively, the above-mentioned battery cell assembly is installed on the electrical appliance device.

[0022] For the technical effects brought by any of the implementation manners in the above second aspect to third aspect, reference may be made to the technical effects brought by the corresponding implementation manners in the first aspect, which will not be elaborated herein. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of a vehicle provided by an embodiment of the present application;

[0024] Figure 2 It is a schematic structural diagram of a battery pack provided by an embodiment of the present application;

[0025] Figure 3 It is one of the schematic structural diagrams of a battery cell assembly provided by an embodiment of the present application;

[0026] Figure 4 It is another schematic structural diagram of a battery cell assembly provided by an embodiment of the present application;

[0027] Figure 5 It is a schematic structural diagram of a first exhaust member and a second exhaust member provided by an embodiment of the present application;

[0028] Figure 6 It is a third schematic structural diagram of a battery cell assembly provided by an embodiment of the present application;

[0029] Figure 7 It is a fourth schematic structural diagram of a battery cell assembly provided by an embodiment of the present application;

[0030] Figure 8 It is a schematic structural diagram of a first exhaust member, a second exhaust member, a first protective member and a second protective member provided by an embodiment of the present application;

[0031] Figure 9 It is one of the schematic structural diagrams of a first exhaust member and a first protective member provided by an embodiment of the present application;

[0032] Figure 10 It is one of the schematic structural diagrams of a second exhaust member and a second protective member provided by an embodiment of the present application;

[0033] Figure 11 It is another schematic structural diagram of a first exhaust member and a first protective member provided by an embodiment of the present application;

[0034] Figure 12 This is the second schematic structural diagram of a second exhaust component and a second protective component provided by an embodiment of the present application.

[0035] Reference numerals:

[0036] 1. Vehicle; 2. Chassis; 3. Body; 4. Wheel; 5. Battery pack; 6. Housing; 7. Battery management system;

[0037] 100. Cell assembly; 10. First cell; 11. First pressure relief component; 12. Third pressure relief component; 13. First positive terminal; 14. First negative terminal; 15. Terminal; 20. Second cell; 21. Second pressure relief component; 22. Fourth pressure relief component; 23. Second positive terminal; 24. Second negative terminal; 30. First exhaust component; 31. First exhaust hole; 32. First exhaust channel; 321. First sink; 322. First opening; 323. Second opening; 324. First switching valve; 325. Second switching valve; 40. Second exhaust component; 41. Second exhaust hole; 42. Second exhaust channel; 421. Second sink; 422. Third opening; 423. Fourth opening; 424. Third switching valve port; 425. Fourth switching valve port; 50. Third exhaust component; 51. Third exhaust hole; 60. Fourth exhaust component; 61. Fourth exhaust hole; 70. First protective component; 71. Second protective component; 80. Smoke sensor; 90. Controller;

[0038] F1. First direction; F2. Second direction. Detailed implementation manners

[0039] The embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

[0040] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0041] The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0042] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, when describing pipelines or channels, the terms "connected" and "coupled" used in this application have the meaning of conducting. The specific meaning needs to be understood in combination with the context.

[0043] It should be noted that in practical applications, due to the limitations of equipment accuracy or installation errors, it is difficult to achieve an absolute parallel or perpendicular effect. In this application, the descriptions of "perpendicular", "parallel", or "in the same direction" are not absolute limiting conditions, but rather indicate that a vertical or parallel structural setting can be achieved within a preset error range and the corresponding preset effects can be achieved. In this way, the technical effects of the limiting features can be maximally realized, and the corresponding technical solutions are easy to implement and have high feasibility. For example, "perpendicular" includes absolute perpendicular and approximate perpendicular, and the acceptable deviation range of approximate perpendicular can be, for example, within 5°. "Parallel" includes absolute parallel and approximate parallel, and the acceptable deviation range of approximate parallel can be, for example, within 5°. "In the same direction" includes absolute in the same direction and approximate in the same direction, and the acceptable deviation range of approximate in the same direction can be, for example, within 5°.

[0044] In the embodiments of the present application, words such as "exemplarily" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design solution described as "exemplarily" or "for example" in the embodiments of the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Exactly speaking, the use of words such as "exemplarily" or "for example" is intended to present relevant concepts in a specific manner.

[0045] As the power source of an electrical device, the power battery is one of the important components of the electrical device, and the safety of the power battery is particularly important.

[0046] In the prior art, the battery cell assembly includes a plurality of first battery cells and a plurality of second battery cells. The first battery cell is provided with a first pressure relief member, and the second battery cell is provided with a second pressure relief member. The battery cell assembly further includes an exhaust member, and the exhaust member is provided with a plurality of exhaust holes, and the plurality of exhaust holes are opposite to and communicate with the first pressure relief member and the second pressure relief member.

[0047] In this way, the first battery cell and the second battery cell are vented through the same venting component. If adjacent battery cells experience thermal runaway and release a large amount of gas instantaneously, and the venting component fails to vent the gas in time, it is likely to lead to more severe safety problems.

[0048] Based on this, the present application provides an electrical device, including an electrical appliance device and a battery pack installed on the electrical appliance device.

[0049] It should be noted that the electrical device can be a computer, a vehicle, an aircraft, etc.

[0050] Exemplarily, the electrical device is a vehicle.

[0051] See Figure 1 , Figure 1 which is a schematic structural diagram of a vehicle provided by an embodiment of the present application. An embodiment of the present application provides a vehicle 1, which may include a chassis 2, a body 3, and wheels 4. It can be understood that the vehicle 1 can be a fuel vehicle, an electric vehicle, a hybrid vehicle, a gas vehicle, a methanol vehicle, a solar vehicle, etc. Exemplarily, the vehicle 1 can be a passenger vehicle such as a sedan, a sport utility vehicle (SUV), a multi-purpose vehicle (MPV), etc., or can be a bus, a truck, a semi-trailer, etc. The present application does not make specific limitations in this regard.

[0052] Exemplarily, the present application is described by taking an electric vehicle as an example.

[0053] Among them, the chassis 2 can install the motor and other components of the vehicle 1, form the overall shape of the vehicle 1, and receive the power of the motor to make the vehicle 1 move and ensure normal driving.

[0054] The body 3 can be installed on the chassis 2. A cabin is formed inside the body 3, and the cabin can be used for the driver and passengers to ride or load goods. It should be noted that when the vehicle 1 is a bus or a sedan, its body 3 is generally an integral structure. When the vehicle 1 is a truck, its body 3 is generally composed of a cab and a cargo box.

[0055] The wheels 4 can be installed on the chassis 2 of the vehicle 1 and are components that play a supporting and rotating role during the driving of the vehicle 1. The wheels 4 are usually installed at the four corners of the vehicle 1, that is, the four wheels 4 of the vehicle 1, and they are connected to the axle of the vehicle 1 through the hubs, enabling the vehicle 1 to drive smoothly on the ground.

[0056] It can be understood that the above components are only examples of some components of the vehicle 1 and do not limit the specific structure of the vehicle 1.

[0057] To provide power to the vehicle 1, continue to refer toFigure 1 The vehicle 1 further includes a battery pack 5, and the battery pack 5 is installed on the vehicle body.

[0058] In this way, at the installation position of the battery pack 5 on the vehicle body, a mounting bracket is correspondingly provided to ensure that the battery pack 5 can be firmly fixed on the vehicle 1. The bracket is usually made of strong metal materials and has sufficient load-bearing capacity.

[0059] It should be noted that the installation position of the battery pack 5 depends on the design of the vehicle 1 manufacturer and the requirements of different vehicle models, and factors such as the center of gravity, heat dissipation, and maintenance of the battery pack 5 are usually considered.

[0060] Exemplarily, common installation positions of the battery pack 5 include the chassis 2, the trunk, the bottom of the vehicle 1, etc. Installing the battery pack 5 on the chassis 2 of the vehicle 1 can lower the center of gravity of the battery 7, improve the stability of the vehicle 1, and can save the internal space of the vehicle 1 to the greatest extent. Installing the battery pack 5 in the trunk of the vehicle 1 is convenient for installation and maintenance. Installing the battery pack 5 at the bottom of the vehicle 1 can form a design of the vehicle floor, which is beneficial to the heat dissipation of the battery pack 5 and the stability of the center of gravity of the vehicle 1.

[0061] See Figure 2 , Figure 2 which is a schematic structural diagram of a battery pack provided by an embodiment of the present application. The battery pack 5 provided in the present application may include a housing 6, a plurality of battery cell assemblies 100, a battery management system 7, etc.

[0062] In this way, the housing 6 can provide protection and fixation for the plurality of battery cell assemblies 100, and at the same time can protect the battery pack 5 from the external environment. The battery management system 7 (Battery Management System, BMS) can be used to monitor and manage parameters such as the temperature, voltage, and current of the battery cell assemblies 100 to ensure the safe operation of the battery cell assemblies 100 and extend the service life of the battery cell assemblies 100.

[0063] It should be noted that the present application does not limit the number of the battery cell assemblies 100, and it is specifically set according to the actual situation. Exemplarily, the number of the battery cell assemblies 100 can be two, three, four, etc.

[0064] In some embodiments, see Figure 3 , Figure 3 which is one of the schematic structural diagrams of a battery cell assembly provided by an embodiment of the present application. Figure 3 Two battery cell assemblies 100 are taken as an example for illustration in

[0065] The housing can provide protection and support for the battery cell assembly 100. The battery cell assembly 100 can be fixed in the housing by screws, bolts, etc.

[0066] The present application does not limit the number of the battery cell assemblies 100, which is specifically set according to the actual situation. Exemplarily, the number of the batteries 7 can be two, three, four, etc.

[0067] It should be noted that the present application does not limit the type of the battery cell assemblies 100, which is specifically set according to the actual needs.

[0068] In some embodiments, the battery cell assembly 100 can adopt lithium-ion battery cells, etc. Lithium-ion battery cells have the advantages of high energy density, long cycle life, light weight, etc., and are suitable for use as the power source of electric vehicles. Using lithium-ion battery cells in electric vehicles can provide sufficient power output and cruising range, and at the same time have a long service life and good safety performance.

[0069] In some embodiments, refer to Figure 4 , Figure 4 which is the second structural schematic diagram of a battery cell assembly provided by an embodiment of the present application, Figure 4 the battery cell assembly 100 in Figure 3 is the lower battery cell assembly 100 in

[0070] Specifically, the plurality of first battery cells 10 and the plurality of second battery cells 20 are alternately stacked in sequence along the first direction F1. In this way, the energy capacity of the battery cell assembly 100 can be effectively increased under the same volume, and the energy density of the battery pack can be improved.

[0071] In some embodiments, one first battery cell 10 and one second battery cell 20 can be alternately stacked.

[0072] In some embodiments, a plurality of first battery cells 10 and one second battery cell 20 can be alternately stacked.

[0073] In some embodiments, one first battery cell 10 and a plurality of second battery cells 20 can be alternately stacked.

[0074] The first battery cell 10 is provided with a first pressure relief member 11, the second battery cell 20 is provided with a second pressure relief member 21, the first pressure relief members 11 of the plurality of first battery cells 10 are located on the same surface of the plurality of first battery cells 10, the second pressure relief members 21 of the plurality of second battery cells 20 are located on the same surface of the plurality of second battery cells 20, and the first pressure relief members 11 of the plurality of first battery cells 10 are arranged in a row along the first direction F1, and the second pressure relief members 21 of the plurality of second battery cells 20 are arranged in a row along the first direction F1. The first pressure relief member 11 and the second pressure relief member 21 are spaced apart along the second direction F2. Wherein, the second direction F2 is perpendicular to the first direction F1.

[0075] Among them, the side wall of the battery cell is one of the multiple side walls that surround the first direction F1 for one week and belong to the battery cell. In this way, the first pressure relief members 11 of the multiple first battery cells 10 and the second pressure relief members 21 of the multiple second battery cells 20 are arranged in a row along the first direction F1 and are spaced apart along the second direction F2, which can effectively utilize the internal space of the battery and make the internal structure of the battery more compact.

[0076] It should be noted that the multiple first pressure relief members 11 being on the same side of the multiple first battery cells 10 and the multiple second pressure relief members 21 being on the same side of the multiple second battery cells 20 can be on the same side of the battery cell assembly or on different sides of the battery cell assembly. This application does not limit this and is specifically set according to the actual situation.

[0077] Exemplarily, the second direction F2 is parallel to the side wall where the first pressure relief member 11 is located or the side wall where the second pressure relief member 21 is located. Refer to Figure 3 and in combination with Figure 5 , Figure 5 which is a schematic structural diagram of a first exhaust member and a second exhaust member provided by an embodiment of the present application. Among them, the first exhaust member 30 and the second exhaust member 40 are Figure 4 the first exhaust member 30 and the second exhaust member 40 in

[0078] The first exhaust member 30 extends along the first direction F1, and the first exhaust member 30 is provided with a plurality of first exhaust holes 31, and the plurality of first exhaust holes 31 are respectively opposite to and communicated with the first pressure relief members 11 of the plurality of first battery cells 10. The second exhaust member 40 extends along the first direction F1, and the second exhaust member 40 is provided with a plurality of second exhaust holes 41, and the plurality of second exhaust holes 41 are respectively opposite to and communicated with the second pressure relief members 21 of the plurality of second battery cells 20.

[0079] In this way, by providing the first exhaust member 30 and the second exhaust member 40 in the present application, the first pressure relief members 11 of the plurality of first battery cells 10 and the second pressure relief members 21 of the plurality of second battery cells 20 can be respectively communicated, and different exhaust paths can be provided for the plurality of first battery cells 10 and the plurality of second battery cells 20. In this way, if a thermal runaway problem occurs in the battery cell assembly 100, the adjacent first battery cell 10 and second battery cell 20 can exhaust through different exhaust members, which can improve the exhaust efficiency of the battery cell assembly 100, and then quickly discharge the heat generated inside the battery cell assembly 100, avoid generating more serious safety problems, and improve the safety of the battery cell assembly 100.

[0080] In some embodiments, refer to Figure 4 and in combination with Figure 6 ,Figure 6 This is the third schematic structural view of a battery cell assembly provided by an embodiment of the present application. Figure 6 It is Figure 4 the right view. The two ends of the first battery cell 10 along the second direction F2 are respectively a first positive electrode end 13 and a first negative electrode end 14. The two ends of the second battery cell 20 along the second direction F2 are respectively a second positive electrode end 23 and a second negative electrode end 24. The direction from the first positive electrode end 13 of the first battery cell 10 to the first negative electrode end 14 of the first battery cell 10 is opposite to the direction from the second positive electrode end 23 of the second battery cell 20 to the second negative electrode end 24 of the second battery cell 20.

[0081] In this way, since multiple first battery cells 10 and multiple second battery cells 20 need to be connected in series, setting the direction from the first positive electrode end 13 of the first battery cell 10 to the first negative electrode end 14 of the first battery cell 10 to be opposite to the direction from the second positive electrode end 23 of the second battery cell 20 to the second negative electrode end 24 of the second battery cell 20 can simplify the circuit structure inside the battery pack, reduce the circuit complexity, and contribute to improving the reliability and stability of the battery cell assembly 100.

[0082] Along the second direction F2, the distance from the first pressure relief member 11 to the first positive electrode end 13 of the first battery cell 10 is equal to the distance from the second pressure relief member 21 to the second positive electrode end 23 of the second battery cell 20.

[0083] This can unify the installation positions of the first pressure relief member 11 of the first battery cell 10 and the second pressure relief member 21 of the second battery cell 20. When processing the first battery cell 10 and the second battery cell 20, a single mold can be used, reducing the setting cost and manufacturing cost.

[0084] In some embodiments, along the direction perpendicular to the first direction F1 and perpendicular to the second direction F2, the first pressure relief member 11 and the second pressure relief member 21 can be located on the upper side of the first battery cell 10 and the second battery cell 20. In this way, since the density of the gas is small, setting the pressure relief member on the upper side of the battery cell is beneficial to the discharge of the gas.

[0085] In some other embodiments, the first pressure relief member 11 and the second pressure relief member 21 can also be located on the lower side of the first battery cell 10 and the second battery cell 20.

[0086] In some embodiments, along the first direction F1, the first pressure relief member 11 can be located in the middle of the first battery cell 10. It can also be located at the rear side of the first battery cell 10.

[0087] The first pressure relief member 11 is located in the middle of the first battery cell 10, which is convenient for processing and manufacturing.

[0088] In some other embodiments, along the first direction F1, the first pressure relief member 11 can be located at the rear side of the first battery cell 10.

[0089] In order to output electric power outward, pole columns 15 are provided at the positive and negative extreme ends of the first battery cell 10 and the second battery cell 20. The distances of the pole columns 15 at the first positive extreme end 13 of the first battery cell 10 and the pole columns 15 at the second negative extreme end 24 of the second battery cell 20 from the bottom of the battery cell 100 are different. In this way, the positions of the pole pieces on the housing that match the pole columns 15 can also be arranged staggeredly, which can provide a larger installation space for other devices inside the housing and make the structure more compact.

[0090] In some embodiments, referring again to Figure 3 and Figure 4 , the first battery cell 10 is further provided with a third pressure relief member 12. The third pressure relief member 12 and the first pressure relief member 11 are located on the same side wall of the first battery cell 10, and the third pressure relief member 12 and the first pressure relief member 11 are spaced apart along the second direction F2. The second battery cell 20 is further provided with a fourth pressure relief member 22. The fourth pressure relief member 22 and the second pressure relief member 21 are located on the same side wall of the second battery cell 20, and the fourth pressure relief member 22 and the second pressure relief member 21 are spaced apart along the second direction F2. The third pressure relief members 12 of multiple first battery cells 10 are arranged in a row along the first direction F1, and the fourth pressure relief members 22 of multiple second battery cells 20 are arranged in a row along the first direction F1. The third pressure relief member 12 and the fourth pressure relief member 22 are spaced apart along the second direction F2.

[0091] In this way, one first battery cell 10 can include the first pressure relief member 11 and the third pressure relief member 12, and one second battery cell 20 can include the second pressure relief member 21 and the fourth pressure relief member 22, which can improve the efficiency of gas discharge when the battery cell assembly 100 undergoes thermal runaway, quickly discharge the heat generated inside the battery cell assembly 100, avoid more serious safety problems, and improve the safety of the battery cell assembly 100.

[0092] Referring again to Figure 3 and Figure 4 , the battery cell assembly 100 further includes a third exhaust member 50 and a fourth exhaust member 60. The third exhaust member 50 extends along the first direction F1, and the third exhaust member 50 is provided with a plurality of third exhaust holes 51, and the plurality of third exhaust holes 51 are respectively opposite to and communicated with the plurality of third pressure relief members 12. The fourth exhaust member 60 extends along the first direction F1, and the fourth exhaust member 60 is provided with a plurality of fourth exhaust holes 61, and the plurality of fourth exhaust holes 61 are respectively opposite to and communicated with the plurality of fourth pressure relief members 22.

[0093] In this way, by providing the third exhaust member 50 and the fourth exhaust member 60, the third pressure relief members 12 of multiple first battery cells 10 and the fourth pressure relief members 22 of multiple second battery cells 20 can be connected respectively, which can provide different exhaust paths for the multiple first battery cells 10 and the multiple second battery cells 20, improve the exhaust efficiency, and further enhance the safety of the battery cell assembly 100. Meanwhile, by arranging the third exhaust member 50 and the fourth exhaust member 60 to extend along the first direction F1, it will not obstruct the gas generated by the thermal runaway of the battery cell assembly 100, and can make the exhaust smoother, further improving the exhaust efficiency.

[0094] In some other embodiments, the first battery cell 10 may further include a fifth pressure relief member, and the second battery cell 20 may further include a sixth pressure relief member. The battery cell assembly 100 further includes a fifth exhaust member and a sixth exhaust member, so that the exhaust efficiency of the battery cell assembly 100 is higher.

[0095] In some embodiments, the two ends of the first battery cell 10 along the second direction F2 are respectively a first positive electrode end 13 and a first negative electrode end 14. The two ends of the second battery cell 20 along the second direction F2 are respectively a second positive electrode end 23 and a second negative electrode end 24, and the direction from the first positive electrode end 13 to the first negative electrode end 14 of the first battery cell 10 is opposite to the direction from the second positive electrode end 23 to the second negative electrode end 24 of the second battery cell 20.

[0096] Along the second direction F2, the distance from the third pressure relief member 12 to the first positive electrode end 13 of the first battery cell 10 is equal to the distance from the fourth pressure relief member 22 to the second positive electrode end 23 of the second battery cell 20.

[0097] This can unify the installation positions of the third pressure relief member 12 of the first battery cell 10 and the fourth pressure relief member 22 of the second battery cell 20. When processing the first battery cell 10 and the second battery cell 20, a single mold can be used, reducing the setting cost and manufacturing cost.

[0098] In some embodiments, along the second direction F2, the distance from the first pressure relief member 11 to the positive electrode end of the first battery cell 10 may be greater than the distance from the third pressure relief member 12 to the positive electrode end of the first battery cell 10. Refer to Figure 7 , Figure 7 FIG. 4 is a schematic structural diagram of a battery cell assembly provided by an embodiment of the present application. In the present application, an example is given where the distance from the first pressure relief member 11 to the positive electrode end of the first battery cell 10 is less than the distance from the third pressure relief member 12 to the positive electrode end of the first battery cell 10. In this way, the design of the first pressure relief member 11 and the third pressure relief member 12 of the first battery cell 10 is more reasonable, which is beneficial to the discharge of gas.

[0099] In some other embodiments, along the second direction F2, the distance from the first pressure relief member 11 to the positive electrode end of the first battery cell 10 may also be less than the distance from the third pressure relief member 12 to the positive electrode end of the first battery cell 10.

[0100] In some embodiments, both the first battery cell 10 and the second battery cell 20 are in the shape of rectangular plates, and the thickness directions of the first battery cell 10 and the second battery cell 20 are both consistent with the first direction F1, and the length directions of the first battery cell 10 and the second battery cell 20 are both consistent with the second direction F2.

[0101] In this way, a plurality of pressure relief members are provided in the length directions of the first battery cell 10 and the second battery cell 20, so that the exhaust gas in the length directions can be discharged through the plurality of pressure relief members, and the exhaust is more uniform, which is beneficial to improving the exhaust efficiency. In addition, the shape of the battery cell assembly 100 can be made more regular, the internal space of the battery cell assembly 100 can be effectively utilized, space waste can be reduced, the energy density of the battery cell assembly 100 can be increased, the battery cell assembly 100 can be made more compact, and the overall volume can be reduced.

[0102] In some embodiments, the length of the first battery cell 10 is the same as the length of the second battery cell 20, the width of the first battery cell 10 is the same as the width of the second battery cell 20, and the thickness of the first battery cell 10 is the same as the thickness of the second battery cell 20.

[0103] This can make the structure of the entire battery cell assembly 100 more uniform and stable, reduce the mismatch between components, and reduce the possibility of structural stress concentration caused by dimensional differences in different parts, thereby improving the structural stability of the battery cell assembly 100.

[0104] In some other embodiments, the length of the first battery cell 10 may be different from the length of the second battery cell 20, the width of the first battery cell 10 may be different from the width of the second battery cell 20, and the height of the first battery cell 10 may be different from the height of the second battery cell 20.

[0105] In some embodiments, referring to Figure 8 , Figure 8 is a schematic structural diagram of a first exhaust member, a second exhaust member, a first protective member, and a second protective member provided in an embodiment of the present application. The first exhaust hole 31 is provided with a first protective member 70. The first protective member 70 is in the shape of a sheet, and the first protective member 70 covers the first exhaust hole 31. The first protective member 70 is used to open the first exhaust hole 31 when the pressure from the first pressure relief member 11 is greater than or equal to a first preset threshold. The first preset threshold is less than the bursting threshold of the first pressure relief member 11.

[0106] In this way, the first pressure relief member 11 is a normally closed valve. When the first battery cell 10 undergoes thermal runaway, the gas pushes open the first pressure relief member 11, and the first pressure relief member 11 applies pressure to the protective member 70. When this pressure is greater than the preset threshold of the first protective member 70, the first protective member 70 can open the first exhaust hole 31, and the gas is discharged from the first exhaust hole 31. When the first battery cell 10 undergoes thermal runaway, the first protective member 70 can protect other non-runaway battery cells. In addition, the first protective member 70 can protect the first battery cell 10 from dust and water.

[0107] In some embodiments, each first exhaust hole 31 can be provided with a first protective member 70.

[0108] In some other embodiments, the first protective member 70 can be provided for some of the first exhaust holes 31.

[0109] In some embodiments, the second exhaust hole 41 is provided with a second protective member 71. The second protective member 71 is used to open the second exhaust hole 41 when the pressure from the outside is greater than or equal to the second preset threshold. The second preset threshold is less than the bursting threshold of the second pressure relief member 12.

[0110] In some embodiments, each second exhaust hole 41 can be provided with a second protective member 71.

[0111] In some other embodiments, the second protective member 71 can be provided for some of the second exhaust holes 41.

[0112] In some embodiments, the first protective member 70 is in the shape of a sheet. The first protective member 70 covers the first exhaust hole 31. The first protective member 70 is used to rupture to open the first exhaust hole 31 when the pressure from the first pressure relief member 11 is greater than or equal to the first preset threshold.

[0113] In this way, when the first battery cell 10 undergoes thermal runaway, the gas pushes open the first pressure relief member 11, and the first pressure relief member 11 applies pressure to the protective member 70. When this pressure is greater than the first preset threshold of the first protective member 70, the first protective member 70 rupturing to open the first exhaust hole 31 will not cause blockage to the discharge of the gas, which can make the discharge of the gas smoother and improve the exhaust efficiency.

[0114] In some embodiments, the second protective member 71 is in the shape of a sheet. The second protective member 71 covers the second exhaust hole 41. The second protective member 71 is used to open the second exhaust hole 41 when the pressure from the second pressure relief member 21 is greater than or equal to the second preset threshold. The second preset threshold is less than the bursting threshold of the second pressure relief member 21.

[0115] Exemplarily, the protective member 70 can be made of heat-resistant materials. For example, mica sheets, ceramics, etc.

[0116] In some embodiments, the first exhaust member 30 includes a first exhaust passage 32, and the first exhaust hole 31 communicates with the first exhaust passage 32. A first sink 321 is provided on the inner wall surface of the first exhaust passage 32. One end opening of the first exhaust hole 31 communicating with the first exhaust passage 32 is located on the bottom surface of the first sink 321, and at least a part of the first protection member 70 is received in the first sink 321.

[0117] In this way, by receiving the first protection member 70 in the first sink 321, the position of the first protection member 70 can be fixed to a certain extent, preventing it from moving or shaking during operation, improving the stability of the first protection member 70, and effectively protecting the internal components of the battery cell assembly 100.

[0118] In some embodiments, the first protection member 70 may be entirely located in the first sink 321. Refer to Figure 9 , Figure 9 which is one of the schematic structural diagrams of the first exhaust member and the first protection member provided by the embodiment of the present application. The first protection member 70 is entirely located in the first sink 321, and the side of the first protection member 70 away from the first pressure relief member 11 is flush with the inner wall surface of the first exhaust passage 32. In this way, the inner wall of the first exhaust passage 32 is relatively flat, which is beneficial to the discharge of gas.

[0119] In some other embodiments, the first protection member 70 may also be partially located in the first sink 321.

[0120] In some embodiments, referring again to Figure 9 , both ends of the first exhaust passage 32 penetrate through the first exhaust member 30 and respectively form a first opening 322 and a second opening 323, and one of the first opening 322 and the second opening 323 communicates with the air outlet of the air cooling system.

[0121] In this way, setting up the air cooling system is beneficial to the air flow in the first exhaust passage 32, thereby accelerating the discharge of the gas generated by the thermal runaway of the battery cell assembly 100.

[0122] In some embodiments, Figure 10 which is one of the schematic structural diagrams of the second exhaust member and the second protection member provided by the embodiment of the present application. The second exhaust member 40 includes a second exhaust passage 42, and the second exhaust hole 41 communicates with the second exhaust passage 42. A second sink 421 is provided on the inner wall surface of the second exhaust passage 42. One end opening of the second exhaust hole 41 communicating with the second exhaust passage 42 is located on the bottom surface of the second sink 421, and at least a part of the second protection member 71 is received in the second sink 421.

[0123] In some embodiments, both ends of the second exhaust passage 42 penetrate through the second exhaust member 40 and respectively form a third opening 422 and a fourth opening 423, and one of the third opening 422 and the fourth opening 423 is in communication with the air outlet of the air cooling system.

[0124] In some embodiments, air can be introduced into the air cooling system.

[0125] In some other embodiments, the air cooling system can also be connected to the refrigeration system to introduce cold air.

[0126] In some embodiments, referring to Figure 11 , Figure 11 FIG. 2 is a second schematic structural diagram of a first exhaust member and a first protective member provided by an embodiment of the present application. A first switching valve 324 is provided at the first opening 322, and a second switching valve 325 is provided at the second opening 323. The cell assembly 100 further includes a smoke sensor 80 and a controller 90. The smoke sensor 80 is disposed in the first exhaust passage 32. The controller 90 is electrically connected to the first switching valve 324, the second switching valve 325, and the smoke sensor 80. The controller 90 is configured to control the opening or closing of the first switching valve 324 and the second switching valve 325 according to the detection value of the smoke sensor 80.

[0127] In this way, a first switching valve 324 is provided at the first opening 322, and a second switching valve 325 is provided at the second opening 323, which can isolate the first exhaust passage 32 from the external environment and improve the waterproof and dustproof effects of the cell assembly 100. By providing the smoke sensor 80, the smoke concentration in the first exhaust passage 32 can be detected, and the occurrence of thermal runaway of the cell assembly 100 can be accurately judged.

[0128] In this way, by monitoring the detection value of the smoke sensor 80 by the controller 90, abnormal conditions that may exist inside the cell assembly 100 can be detected in a timely manner, and the first switching valve 324 and the second switching valve 325 can be controlled to open or close reasonably, so as to achieve the purpose of discharging harmful gases or slowing down the spread of abnormal conditions and improve the safety of the cell assembly 100.

[0129] In addition, by cooperating with the controller 90, automatic monitoring and control of the operating state of the cell assembly 100 can be realized, the operating efficiency can be improved, manual intervention can be reduced, the operation cost can be lowered, and the overall management level of the cell assembly 100 can be improved.

[0130] In some embodiments, the smoke sensor 80 can detect the smoke in the first exhaust passage 32.

[0131] In some other embodiments, the smoke sensor 80 can also detect the temperature in the first exhaust passage 32.

[0132] In some embodiments, referring to Figure 12, Figure 12 This is the second structural schematic diagram of the second exhaust component and the second protection component provided by the embodiment of the present application. A third switching valve port 424 is provided at the third opening 422, and a fourth switching valve port 425 is provided at the fourth opening 423. The battery cell assembly 100 further includes a smoke sensor 80 and a controller 90. The smoke sensor 80 is disposed in the second exhaust passage 42. The controller 90 is electrically connected to the third switching valve port 424, the fourth switching valve port 425, and the smoke sensor 80. The controller 90 is configured to control the opening or closing of the third switching valve port 424 and the fourth switching valve port 425 according to the detection value of the smoke sensor 80.

[0133] In some embodiments, the third exhaust component 50, the fourth exhaust component 60, the fifth exhaust component, and the sixth exhaust component can also be arranged as above.

[0134] Although the present application has been described in conjunction with specific features and their embodiments, it is obvious that various modifications and combinations can be made without departing from the spirit and scope of the present application. Accordingly, the present specification and the drawings are merely exemplary illustrations of the present application defined by the appended claims, and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of the present application. Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these changes and modifications.

[0135] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A battery cell assembly, characterized in that, Including: A plurality of first battery cells (10) and a plurality of second battery cells (20), the plurality of first battery cells (10) and the plurality of second battery cells (20) are alternately stacked in sequence along a first direction (F1); the first battery cell (10) is provided with a first pressure relief member (11), the second battery cell (20) is provided with a second pressure relief member (21), the first pressure relief members (11) of the plurality of first battery cells (10) are located on the same surface of the plurality of first battery cells (10), the second pressure relief members (21) of the plurality of second battery cells (20) are located on the same surface of the plurality of second battery cells (20), and the first pressure relief members (11) of the plurality of first battery cells (10) are arranged in a row along the first direction (F1), the second pressure relief members (21) of the plurality of second battery cells (20) are arranged in a row along the first direction (F1); the first pressure relief member (11) and the second pressure relief member (21) are arranged at intervals along a second direction (F2); wherein, the second direction (F2) is perpendicular to the first direction (F1); A first exhaust member (30), the first exhaust member (30) extends along the first direction (F1), and the first exhaust member (30) is provided with a plurality of first exhaust holes (31), the plurality of first exhaust holes (31) are respectively opposite to and communicated with the first pressure relief members (11) of the plurality of first battery cells (10); A second exhaust member (40), the second exhaust member (40) extends along the first direction (F1), and the second exhaust member (40) is provided with a plurality of second exhaust holes (41), the plurality of second exhaust holes (41) are respectively opposite to and communicated with the second pressure relief members (21) of the plurality of second battery cells (20).

2. The cell assembly according to claim 1, characterized in that, The two ends of the first battery cell (10) along the second direction (F2) are respectively a first positive electrode end (13) and a first negative electrode end (14); the two ends of the second battery cell (20) along the second direction (F2) are respectively a second positive electrode end (23) and a second negative electrode end (24), and the direction in which the first positive electrode end (13) of the first battery cell (10) points to the first negative electrode end (14) of the first battery cell (10) is opposite to the direction in which the second positive electrode end (23) of the second battery cell (20) points to the second negative electrode end (24) of the second battery cell (20); Along the second direction (F2), the distance from the first pressure relief member (11) to the first positive electrode end (13) of the first battery cell (10) is equal to the distance from the second pressure relief member (21) to the second positive electrode end (23) of the second battery cell (20).

3. The cell assembly according to claim 1 or 2, characterized in that, The first battery cell (10) is further provided with a third pressure relief member (12), the third pressure relief member (12) and the first pressure relief member (11) are located on the same side wall of the first battery cell (10), and the third pressure relief member (12) and the first pressure relief member (11) are arranged at intervals along the second direction (F2); The second battery cell (20) is further provided with a fourth pressure relief member (22), the fourth pressure relief member (22) and the second pressure relief member (21) are located on the same side wall of the second battery cell (20), and the fourth pressure relief member (22) and the second pressure relief member (21) are arranged at intervals along the second direction (F2); The third pressure relief members (12) of the plurality of first battery cells (10) are arranged in a row along the first direction (F1), and the fourth pressure relief members (22) of the plurality of second battery cells (20) are arranged in a row along the first direction (F1); the third pressure relief members (12) and the fourth pressure relief members (22) are arranged at intervals along the second direction (F2); The battery cell assembly (100) further includes: A third exhaust member (50), the third exhaust member (50) extends along the first direction (F1), and the third exhaust member (50) is provided with a plurality of third exhaust holes (51), and the plurality of third exhaust holes (51) are respectively opposite to and communicated with the plurality of third pressure relief members (12); A fourth exhaust member (60), the fourth exhaust member (60) extends along the first direction (F1), and the fourth exhaust member (60) is provided with a plurality of fourth exhaust holes (61), and the plurality of fourth exhaust holes (61) are respectively opposite to and communicated with the plurality of fourth pressure relief members (22).

4. The cell assembly according to claim 3, wherein, The two ends of the first battery cell (10) along the second direction (F2) are respectively a first positive electrode end (13) and a first negative electrode end (14); the two ends of the second battery cell (20) along the second direction (F2) are respectively a second positive electrode end (23) and a second negative electrode end (24), and the direction from the first positive electrode end (13) to the first negative electrode end (14) of the first battery cell (10) is opposite to the direction from the second positive electrode end (23) to the second negative electrode end (24) of the second battery cell (20); Along the second direction (F2), the distance from the third pressure relief member (12) to the first positive electrode end (13) of the first battery cell (10) is equal to the distance from the fourth pressure relief member (22) to the second positive electrode end (23) of the second battery cell (20).

5. The cell assembly according to claim 1 or 2, characterized in that, The first battery cell (10) and the second battery cell (20) are both in the shape of a rectangular plate, and the thickness directions of the first battery cell (10) and the second battery cell (20) are both consistent with the first direction (F1); the length directions of the first battery cell (10) and the second battery cell (20) are both consistent with the second direction (F2).

6. The cell assembly according to claim 1 or 2, characterized in that, The first exhaust hole (31) is provided with a first protection member (70), and the first protection member (70) is used to open the first exhaust hole (31) when the pressure from the outside is greater than or equal to a first preset threshold; the first preset threshold is less than the bursting threshold of the first pressure relief member (11); and / or, The second exhaust hole (41) is provided with a second protective member (71), and the second protective member (71) is configured to open the second exhaust hole (41) when the pressure from the outside is greater than or equal to a second preset threshold; the second preset threshold is less than the bursting threshold of the second pressure relief member (21).

7. The cell assembly according to claim 6, characterized in that, The first protective member (70) is in a sheet shape, the first protective member (70) covers the first exhaust hole (31), and the first protective member (70) is configured to rupture to open the first exhaust hole (31) when the pressure from the outside is greater than or equal to the first preset threshold; and / or, The second protective member (71) is in a sheet shape, the second protective member (71) covers the second exhaust hole (41), and the second protective member (71) is configured to rupture to open the second exhaust hole (41) when the pressure from the outside is greater than or equal to the second preset threshold.

8. The cell assembly according to claim 7, wherein, The first exhaust member (30) includes a first exhaust passage (32), and the first exhaust hole (31) communicates with the first exhaust passage (32); a first sink (321) is provided on the inner wall surface of the first exhaust passage (32), and one end opening of the first exhaust hole (31) communicating with the first exhaust passage (32) is located on the bottom surface of the first sink (321), and at least a part of the first protective member (70) is accommodated in the first sink (321); and / or, The second exhaust member (40) includes a second exhaust passage (42), and the second exhaust hole (41) communicates with the second exhaust passage (42); a second sink (421) is provided on the inner wall surface of the second exhaust passage (42), and one end opening of the second exhaust hole (41) communicating with the second exhaust passage (42) is located on the bottom surface of the second sink (421), and at least a part of the second protective member (71) is accommodated in the second sink (421).

9. The cell assembly according to claim 8, wherein, Both ends of the first exhaust passage (32) penetrate through the first exhaust member (30) and respectively form a first opening (322) and a second opening (323), and one of the first opening (322) and the second opening (323) communicates with the air outlet of the air-cooling system; and / or, Both ends of the second exhaust passage (42) penetrate through the second exhaust member (40) and respectively form a third opening (422) and a fourth opening (423), and one of the third opening (422) and the fourth opening (423) communicates with the air outlet of the air-cooling system.

10. The battery cell assembly according to claim 9, wherein, The first opening (322) is provided with a first switching valve port (324), and the second opening (323) is provided with a second switching valve port (325); The battery cell assembly (100) further includes: A flue gas sensor (80), and the flue gas sensor (80) is disposed in the first exhaust passage (32); A controller (90), the controller (90) being electrically connected to the first switching valve port (324), the second switching valve port (325), and the flue gas sensor (80), the controller (90) being configured to control the opening or closing of the first switching valve port (324) and the second switching valve port (325) according to the detection value of the flue gas sensor (80); and / or, A third switching valve port (424) is provided at the third opening (422), and a fourth switching valve port (425) is provided at the fourth opening (423); The battery cell assembly (100) further includes: A flue gas sensor (80), the flue gas sensor (80) being disposed in the second exhaust passage (42); A controller (90), the controller (90) being electrically connected to the third switching valve port (424), the fourth switching valve port (425), and the flue gas sensor (80), the controller (90) being configured to control the opening or closing of the third switching valve port (424) and the fourth switching valve port (425) according to the detection value of the flue gas sensor (80).

11. A battery pack, characterized in that, The battery pack (5) includes a plurality of battery cell assemblies (100) according to any one of claims 1-10.

12. An electrical device, characterized in that, Including: An electrical device; The battery pack (5) according to claim 11, the battery pack (5) being mounted on the electrical device; Or, the battery cell assembly (100) according to any one of claims 1-10, the battery cell assembly (100) being mounted on the electrical device.

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