Battery system and electric device

Abstract

The present disclosure provides a battery system, comprising: a battery pack comprising a plurality of batteries and a box body, the plurality of batteries being arranged in the box body, at least one gas space being formed in the box body; the gas flowing assembly is used for promoting gas flowing in the gas space; and the monitoring assembly is arranged in the gas space and is used for monitoring gas safety parameters in the gas space. According to the battery system provided by the invention, the gas in the battery pack is promoted to flow in the gas space through the gas flow assembly; when thermal runaway happens to the ladle body, the gas diffusion speed can be increased through the gas flowing assembly, and the time for monitoring safety parameters of gas in the ladle through the monitoring assembly is shortened.

Description

Technical Field

[0001] The present disclosure relates to the field of new energy technology, and in particular to a battery system and an electrical device. Background Art

[0002] At present, battery packs are often used to power electrical devices. During the use of the battery pack, the battery may rupture abnormally or the battery explosion-proof valve may accidentally open. The battery will discharge electrolyte, hydrogen, carbon dioxide and other substances from the inside. During the use of the battery pack, water may enter the package. Electrolyte and water may cause various high-voltage safety problems. Existing technology can monitor by detecting the concentration of a certain gas in the package. However, since the environment inside the package is relatively closed and the gas is close to the natural convection state, the liquid evaporates slowly and the gas diffuses slowly. When leakage, valve opening, and water ingress occur at a location far away from the gas sensor, it takes a long time for the vapor to diffuse to the gas sensor, making it difficult to quickly warn. Summary of the invention

[0003] In order to solve the problem that thermal runaway gas is detected for a long time in a battery pack, the present disclosure provides a battery system, including: a battery pack, including a box and a plurality of batteries, the plurality of batteries are arranged in the box, and a gas space is also formed in the box; a gas flow component, the gas flow component is used to promote the gas flow in the gas space; a monitoring component, the monitoring component is arranged in the gas space, and is used to monitor the gas safety parameters in the gas space.

[0004] Furthermore, it also includes: a controller, the gas flow component and the monitoring component are both communicatively connected to the controller, and the controller is configured to control the operation of the gas flow component according to the signal of the monitoring component.

[0005] Further, the gas flow component is arranged outside the box, the gas flow component comprises a power device and a gas circuit component, and the power device is arranged in the gas circuit component;

[0006] The gas flow component has a gas flow component outlet and a gas flow component inlet, the gas space has at least one gas space outlet and at least one gas space inlet, the gas space outlet is connected to the gas flow component inlet, and the gas space inlet is connected to the gas flow component outlet; wherein the power device is used to promote the gas in the gas space to enter the gas circuit component from the gas space.

[0007] Furthermore, the box body includes: a beam provided with an internal gas path, and the gas flow component includes a power device, and the power device is used to promote the gas in the gas space to flow through the beam provided with the internal gas path.

[0008] Furthermore, the gas flow component also includes a dustproof net, which is arranged at the inlet side of the power device, or in the flow channel of the gas circuit component, or at the inlet of the gas flow component.

[0009] Furthermore, the gas flow component includes a power device, which is arranged in the gas space and is used to promote the flow of gas in the gas space.

[0010] Furthermore, the gas flow component also includes a heating device, which is arranged in the gas space and is used to promote the gas flow in the gas space.

[0011] Furthermore, it also includes: a flow energy supply component, including an energy supply part and an electric wire, and the energy supply part is electrically connected to the power device of the gas flow component through the electric wire.

[0012] Furthermore, the monitoring component includes: at least one gas concentration sensor, and the gas concentration sensor is arranged inside the gas space.

[0013] Furthermore, the gas concentration sensor is at least one of a dimethyl carbonate vapor sensor, a diethyl carbonate vapor sensor, an ethyl methyl carbonate vapor sensor, and a water vapor sensor.

[0014] Furthermore, it also includes: a battery detection component that is communicatively connected to the controller, and the battery detection component is disposed in the housing; the controller is also configured to: control the operation of the gas flow component according to the signal of the monitoring component and the signal of the battery detection component.

[0015] Furthermore, the battery detection component is a pressure sensor or a voltage sampling line or a flexible circuit board.

[0016] Furthermore, it also includes: an early warning device connected to the controller for communication, the early warning device is configured to alarm according to the signal of the controller; the controller is also configured to control the early warning device to alarm according to the signal of the monitoring component.

[0017] Furthermore, the controller is a battery management system.

[0018] The present disclosure also provides an electrical device, which includes the battery system.

[0019] The present disclosure provides a battery system, including: a battery pack, including a plurality of batteries and a box, wherein the plurality of batteries are arranged in the box, and at least one gas space is formed in the box; a gas flow component, wherein the gas flow component is used to promote the gas flow in the gas space; and a monitoring component, wherein the monitoring component is arranged in the gas space and is used to monitor the gas safety parameters in the gas space. The battery system provided by the present disclosure promotes the gas in the battery pack to flow in the gas space through the gas flow component; when the pack undergoes thermal runaway, the gas flow component can increase the gas diffusion speed, thereby shortening the time for the monitoring component to detect the gas safety parameters in the pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of a battery system disclosed herein.

[0021] Figure 2 A schematic diagram of a battery system according to some embodiments of the present disclosure.

[0022] Figure 3 Schematic diagram of a battery system according to some other embodiments of the present disclosure.

[0023] Figure 4 Schematic diagram of a battery system according to some other embodiments of the present disclosure.

[0024] Figure 5 An exploded diagram of the battery system structure of some embodiments of the present disclosure.

[0025] Figure 6 A schematic diagram of the battery system structure of some embodiments of the present disclosure.

[0026] Figure 7 Another schematic diagram of the battery system disclosed herein.

[0027] Among them, the battery pack 1 has a box body 11, a battery 12, a gas space 13, an air inlet 131 of the gas space in the pack, and an air outlet 132 of the gas space in the pack;

[0028] Gas flow component 2, power device 21, gas path component 22, gas path pipe 221, beam 222 containing gas path, gas flow component inlet 23, gas flow component outlet 24;

[0029] Flow energy supply component 3, energy supply part 31;

[0030] Monitoring component 4 gas sensor 41;

[0031] Early warning device 5;

[0032] Controller 6;

[0033] Battery detection component 7. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments and combinations in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0035] The present disclosure provides a battery system, see Figure 1 The battery system includes: a battery pack 1, including a box 11 and a plurality of batteries 12, the plurality of batteries 12 are arranged in the box 11, and at least one gas space 13 is formed in the box 11;

[0036] A gas flow component 2, the gas flow component 2 is used to promote the gas flow in the gas space 13;

[0037] A monitoring component 4 is disposed in the gas space 13 and is used for monitoring gas safety parameters in the gas space 13 .

[0038] In this embodiment, the gas flow component 2 is used to promote the flow of gas in the battery pack 1 in the gas space 13; when thermal runaway occurs in the pack, the gas flow component 2 can increase the gas diffusion rate and shorten the time for the monitoring component to detect the safety parameters of the gas in the pack.

[0039] In some embodiments, the battery system further includes a controller 6, and the gas flow component 2 and the monitoring component 4 are both in communication with the controller 6, and the controller 6 is configured to control the operation of the gas flow component according to the signal of the monitoring component 4. That is, the controller can determine whether to control the operation of the gas flow component 2, such as turning on or off the gas flow component 2, according to the signal of the monitoring component 4. It can be understood that the gas flow component 2 can also remain turned on and continue to operate, and in this case, the controller 6 does not need to be controlled or set to control it.

[0040] The controller 6 may be placed inside the battery pack 1 or outside the battery pack 1. When placed inside the battery pack 1, the controller 6 may be a battery management controller (BMC).

[0041] In some embodiments, in combination Figures 2 to 6The battery pack 1 includes: a box body 11, a plurality of batteries 12, and the space in the box body not occupied by the batteries 12 forms a gas space 13 in the pack. It can be understood that the gas in the gas space 13 can flow or circulate, and the box body 13 can include a plurality of battery accommodating cavities. If the gases in two or more battery accommodating cavities can flow with each other, they together form a gas space 13. If the gas in a battery accommodating cavity is completely isolated in the cavity, then a gas space 13 is formed in the cavity.

[0042] The gas flow component 2 includes a power device 21 and a gas circuit component 22. The power device 21 is arranged on the gas circuit component 22 to promote the gas flow in the gas circuit component.

[0043] It is understandable that the power device 21 is arranged on the gas circuit member 22 so that the gas in the gas circuit member 22 can flow from one side of the power device 21 to the other side. Specifically, the power device 21 can be an air pump, a fan, or a mechanism that can promote the flow of gas in the gas circuit member. Among them, the air pump can be a peristaltic air pump, a diaphragm air pump, a vacuum pump, a vane pump, etc.

[0044] The gas circuit component 22 can be a pipeline, a silicone tube, a PVC tube, a metal tube, etc., and the pipeline can be arranged outside the battery pack 1 and / or inside the battery pack 1. That is, the gas circuit component 22 can be arranged outside the battery pack, or partially arranged outside the battery pack and partially arranged inside the battery pack, or arranged inside the battery pack.

[0045] The battery pack case may also include a beam with an internal gas path, and the gas in the pack can flow in the pack through the beam with the internal gas path at the same time, without the need for additional gas path parts, saving space in the case. Since the gas entering the internal gas path is not blocked by other structures, the flow speed is relatively fast and can be detected more quickly. At this time, the power device 21 can be placed in the internal gas path of the beam to accelerate the gas circulation in the internal gas path, or it can be placed in other positions of the gas space 13 in the pack to accelerate the gas circulation in the gas space. The beam including the internal gas path can be provided with an inlet and outlet so that the gas generated by thermal runaway can circulate quickly. Accordingly, the monitoring component should be placed where the gas can flow through for monitoring.

[0046] The gas flow component 2 has a gas flow component outlet 24 and a gas flow component inlet 23, and the gas space has at least one gas space outlet 132 and at least one gas space inlet 131. The gas space outlet 132 is connected to the gas flow component inlet 23, and the gas space inlet 131 is connected to the gas flow component outlet 24. In this way, the gas space 13 in the bag and the gas circuit 22 form a gas circulation loop, and the power device 21 promotes the circulation of the gas.

[0047] The flow design such as the number and opening positions of the gas inlet 131 and the gas outlet 132 in the bag and the gas path diameter is obtained through computational fluid dynamics (CFD) simulation or test verification to ensure that there is no flow dead zone in the bag.

[0048] In some embodiments, the gas flow component 2 includes a power device 21, which is disposed in the gas space to promote gas flow in the gas space. In this case, no gas path components are required, and the power device 21 can directly accelerate gas diffusion in the gas space.

[0049] In other embodiments, the gas flow component 2 includes a power device 21, which is disposed in the gas space to promote gas flow in the gas space. In this case, no gas path components are required, and the power device 21 can directly accelerate gas diffusion in the gas space.

[0050] The gas flow component 2 may further include a dustproof net, which is disposed at the inlet side of the power device 21, or in the flow channel of the gas path component 22, or at the inlet 23 of the gas flow component for dust prevention.

[0051] The gas flow component 2 also includes a heating device, which is arranged in the gas space to promote the flow of the medium in the gas space. When thermal runaway occurs, there may be leakage of electrolyte or water generation. The heating device can heat and circulate these media to a certain extent, promote the volatilization of electrolyte or water in the package, and increase the concentration of electrolyte gas or water vapor in the package, so that the gas can be monitored faster, thereby detecting thermal runaway earlier. The battery system also includes: a flow energy supply component 3, including an energy supply component 31 and an electric wire. The energy supply component is electrically connected to the power device 21 of the gas flow component 2 through the electric wire, that is, the energy supply component 31 supplies the energy required for the power device 21 to work. The energy supply component 21 can also provide the required energy for the heating device.

[0052] The energy supply component 31 can be the battery pack 1 itself. In this case, a switching device needs to be set up to convert the high voltage electricity of the battery pack into low voltage electricity that can be used by the energy supply component 31. The energy supply component 31 can also be other devices with power generation functions, such as batteries, thermoelectric sheets, solar panels, small wind power generation devices, fuel cells, etc. The energy supply component 31 can be a thermoelectric sheet. Thermoelectric effect is used to generate electricity and supply power to achieve energy conservation and emission reduction. The thermoelectric sheet is placed inside the battery pack 1 or outside the battery pack 1. When placing it, ensure that one side is the cold side and the other side is the hot side, so that electricity can be generated to supply the power device 21 to work. For example, the thermoelectric sheet is placed between the battery and the cold plate and fixed. Since the temperature on the cold plate side is low and the temperature on the battery side is high, power can be supplied to the power device 21.

[0053] The energy supply member 31 may also be a solar panel, which is placed outside the battery pack 1 and uses solar energy to generate electricity, thereby achieving energy conservation and emission reduction.

[0054] The monitoring component 4 includes at least one gas concentration sensor 41, which is placed in the box so that the gas in the bag can be monitored, for example, it can be placed inside the gas space 13 in the bag. The gas concentration sensor 41 can be connected to the controller 6 for communication, that is, the gas concentration sensor can be connected to the controller 6 by wire through a signal line, or it can communicate wirelessly to transmit the signal of the gas concentration sensor 41 to the controller 6. The monitoring component 4 can also have its own controller to realize control according to the monitoring results of the gas concentration sensor 41. It can be understood that the gas safety parameter can be gas concentration or other parameters, such as temperature, pressure, etc. The monitoring component needs to be equipped with other sensors for collection or use a multi-in-one sensor to collect multiple parameters of the gas at the same time.

[0055] The gas concentration sensor 41 includes at least one of a dimethyl carbonate (DMC) vapor sensor, a diethyl carbonate (DEC) vapor sensor, an ethyl methyl carbonate (EMC) vapor sensor, and a water vapor sensor.

[0056] The monitoring component 4 may also have other gas concentration sensors 41, such as a hydrogen sensor, an oxygen sensor, a CO2 sensor, a CO sensor, a methane sensor, an ethane sensor, an ethylene sensor, a propane sensor, a propylene sensor, and the like.

[0057] It can be understood that the gas concentration sensor 41 can be multiple or multiple gas concentration sensors 41 mentioned above, or it can be an all-in-one gas sensor that monitors multiple gases. For example, it can be an organic gas concentration sensor that monitors the comprehensive concentration of multiple gases in DMC, DEC, and EMC.

[0058] The battery system also includes: an early warning device 5 that is communicatively connected to the controller 6, and the early warning device 5 is configured to alarm according to the signal of the controller. The early warning device may include an alarm, an alarm light, etc.; the controller 6 is also configured to: control the early warning device to alarm according to the signal of the monitoring component.

[0059] In some embodiments, see Figure 2, the gas circuit component 22 is arranged outside the battery pack, the gas space outlet 132 is connected to the gas flow component inlet 23, and the gas space inlet 131 is connected to the gas flow component outlet 24; at this time, the gas space in the battery pack and the gas flow component form a gas circulation loop. The power device 21 adopts an air pump, which is also arranged outside the battery pack, that is, the entire gas flow component 2 is arranged outside the battery pack, and the power device 21 allows the gas in the gas circuit component to flow from one side of the power device to the other side. The energy supply component 31 adopts a thermoelectric sheet to provide electrical energy for the power device 21. The gas in the pack flows into the gas flow component from the gas space outlet 132 of the battery pack, passes through the power device 21, and then flows out from the gas flow component outlet 24 and returns to the battery pack, thereby promoting the circulation of gas in the gas space in the pack.

[0060] The gas in the battery pack is rapidly diffused through the gas flow component 2, and when thermal runaway occurs, the thermal runaway gas can be discovered more promptly.

[0061] A gas concentration sensor 41 is arranged in the bag, and the controller 6 controls the gas flow component 2 and / or controls the early warning device 5 to alarm according to the information collected by the gas concentration sensor 41.

[0062] In some embodiments, the gas flow component 2 includes a power device 21, which is disposed in the gas space to promote the gas flow in the gas space. In this case, no gas path components are required, and the power device 21 can directly accelerate the diffusion of gas in the gas space. The power device 21 can be a fan.

[0063] See also Figure 3 The power device 21 is arranged in the battery pack. In this case, the box body 11 may further include a beam with an internal gas path, and the gas in the pack may flow in the pack via the beam with the internal gas path. The box body 11 may further include an additional gas path component 22, and the power device 21 is arranged on the gas path component, which may be an air pump.

[0064] The monitoring component 4 includes two gas concentration sensors 41, and the controller 6 can be arranged outside the battery pack, that is, the controller can be an external battery management system or a control system of an electrical device. The controller 6 controls the operation of the gas flow component 2 or controls the early warning device 5 to alarm according to the signal transmitted by the monitoring component 4.

[0065] For example, the two gas concentration sensors 41 are respectively an electrolyte vapor concentration sensor and a water vapor sensor, which monitor the concentration of electrolyte vapor and the concentration of water vapor in the pack respectively. When leakage occurs, the electrolyte vapor concentration in the pack increases rapidly under the action of gas circulation. The electrolyte vapor concentration sensor detects this change and transmits the signal to the controller. The controller performs early warning control according to the strategy. Similarly, when water enters the battery pack, the water vapor concentration in the pack increases rapidly under the action of gas circulation in the pack. The water vapor concentration sensor detects this change and transmits the signal to the controller. The controller adopts an early warning strategy accordingly. In this way, the package body realizes dual rapid early warning of battery leakage and water ingress to the battery pack.

[0066] In some embodiments, the battery system further includes a controller 6 , and the gas flow component 2 and the monitoring component 4 are both in communication with the controller 6 . The controller 6 is configured to control the operation of the gas flow component according to a signal from the monitoring component 4 .

[0067] The controller 6 includes a first control strategy, and the monitoring component 4 (gas concentration sensor 41) transmits real-time information with the controller 6 via a CAN line.

[0068] In the first control strategy, the gas flow component 2 keeps working, and when the gas concentration sensor 41 senses that the target gas concentration rises to a first concentration threshold, the controller 6 triggers the early warning device 51 to sound a safety alarm.

[0069] The controller 6 includes a second control strategy. When the gas concentration sensor 41 senses that the target gas concentration rising rate reaches the first rising threshold, the controller 6 forces the gas flow component to start to help the gas in the bag to diffuse. Through the above control strategy, the controller 6 can control the operating state of the gas flow component based on the gas safety parameters collected by the monitoring component 4, such as one or more gas concentrations, so that the gas generated by thermal runaway can diffuse faster, the thermal runaway can be discovered earlier, and the warning time can be further shortened. At the same time, the controller can further trigger the warning device to remind the user that thermal runaway has occurred.

[0070] In some embodiments, the battery system further includes: a battery detection component 7 that is communicatively connected to the controller 6, and the battery detection component 7 is disposed in the box 11; the controller 6 is further configured to: control the operation of the gas flow component 2 according to the signal of the battery detection component 7. The battery detection component 7 can communicate with the controller 6 via a CAN line, or can directly communicate with the controller 6 wirelessly. The battery detection component can be a pressure sensor or a voltage sensor.

[0071] For example, a pressure sensor gasket is placed between batteries and communicates with the controller 6 via a CAN line. When a nearby battery shell ruptures and leaks, the pressure signal collected by the pressure sensor gasket will change. The controller 6 determines whether to control the power device 21 to work and start the gas flow component.

[0072] For example, the battery detection component 7 can be a voltage collection line, which collects the battery voltage and transmits it to the controller 6. When the nearby battery shell ruptures and leaks, the battery voltage signal will change. The controller 6 determines whether to control the power device 21 to work and start the gas flow component based on the voltage signal.

[0073] For example, the battery detection component 7 can be a flexible printed circuit (FPC), which is provided with a sampling sheet to collect the battery voltage, and the flexible printed circuit is used as a medium for electrical signal transmission for sampling communication within the battery pack. When the battery shell ruptures and leaks, the voltage signal collected by the flexible printed circuit board will change, and the controller determines whether to change the operating state of the gas flow component based on this.

[0074] At this time, the controller 6 includes a third control strategy. In the third control strategy, when the signal collected by the battery detection component 7 meets the set threshold, the gas flow component is turned on. For example, when the voltage of a battery collected by the voltage acquisition line fluctuates and the fluctuation is greater than a certain set value, the controller 6 controls the power device 21 to work and promote the flow and diffusion of gas in the pack. Otherwise, it will not start.

[0075] Through the above control strategy, the controller 6 can control the operating state of the gas flow component based on the signal collected by the battery detection component, so that the gas generated by thermal runaway can diffuse faster, the thermal runaway can be discovered earlier, and the warning time can be further shortened.

[0076] Since both the first control strategy and the third control strategy can control the operating state of the gas flow component, the controller 6 can perform control as long as one of the two control strategies meets the conditions, or the controller can be configured to control the operating state of the gas flow component according to the signal collected by the monitoring component and the signal collected by the battery detection component. For example, at a certain moment, when the gas concentration sensor does not sense the target gas concentration, but the signal collected by the battery detection component meets the set threshold, the controller 6 can turn on the gas flow component. For another example, when the gas concentration sensor senses that the target gas concentration rises to the first concentration threshold, and at the same time, the signal collected by the battery detection component meets the set threshold, the controller 6 turns on the gas flow component. See Figure 4(Example three, multiple outlets), the battery pack 1 includes two battery groups, the battery group includes multiple batteries 12, the multiple batteries 12 are arranged along the first direction, the gas circuit component 22 is arranged outside the battery pack, the gas flow component 2 includes a gas flow component inlet 23, two gas flow component outlets 24, and accordingly, the gas space includes a gas space outlet 132 connected to the gas flow component inlet 23, and two gas space inlets 131 connected to the gas flow component outlets 24. The two gas space inlets 131 are arranged on both sides of the first direction of the box body, so that the gas flow in the package is more uniform and the flow dead zone is avoided. The power device 21 is also arranged outside the battery pack. The power device 21 can be an air pump or a fan, and the energy supply component 31 is a solar panel. The energy supply component 31 is placed outside the battery pack 1 to supply power to the power device 21. The energy supply component 31 uses solar power generation to achieve energy saving and emission reduction.

[0077] The battery system further includes a controller 6 , and the gas flow component 2 and the monitoring component 4 are both in communication connection with the controller 6 . The controller 6 is configured to control the operation of the gas flow component according to the signal of the monitoring component 4 .

[0078] At the same time, the battery system also includes a battery detection component 7 that is communicatively connected to the controller 6. The battery detection component 7 is arranged in the box 11 and communicates with the controller 6 through a CAN line. The battery detection component 7 can be a voltage acquisition device that collects the voltage of the battery and transmits it to the controller 6. When the battery shell nearby ruptures and leaks, the voltage signal will change. The controller 6 determines whether to control the power device 21 to work based on the voltage signal and start the operation of the gas flow component.

[0079] That is, the controller 6 can control the power device 21 or control the early warning device 5 to alarm based on the information collected by the monitoring component 4 and the battery detection component 7.

[0080] The present disclosure also provides an electrical device, which includes the battery system, so that the electrical device using the battery system is safer to use.

[0081] In the description of the embodiments of the present disclosure, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present disclosure and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present disclosure.

[0082] In the description of the embodiments of the present disclosure, “plurality” means two or more than two, unless otherwise clearly and specifically defined.

[0083] Based on the above ideal embodiments of the present disclosure, the relevant staff can make various changes and modifications without departing from the technical concept of the present disclosure through the above description. The technical scope of the present disclosure is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A battery system, characterized in that: include: A battery pack comprises a box and a plurality of batteries, wherein the plurality of batteries are arranged in the box, and a gas space is formed in the box; a gas flow component for promoting gas flow in the gas space; A monitoring component is arranged in the gas space and is used to monitor gas safety parameters in the gas space.

2. The battery system according to claim 1, characterized in that: Also includes: The gas flow component and the monitoring component are both communicatively connected to the controller, and the controller is configured to control the operation of the gas flow component according to the signal of the monitoring component.

3. The battery system according to claim 1, characterized in that: Gas flow component: The gas flow component is arranged outside the box, and the gas flow component includes a power device and a gas circuit component, and the power device is arranged in the gas circuit component; The gas flow component has a gas flow component outlet and a gas flow component inlet, the gas space has at least one gas space outlet and at least one gas space inlet, the gas space outlet is connected to the gas flow component inlet, and the gas space inlet is connected to the gas flow component outlet; wherein the power device is used to promote the gas in the gas space to enter the gas circuit component from the gas space.

4. The battery system according to claim 1, characterized in that: The box body comprises: a beam provided with an internal gas path, and the gas flow component comprises a power device, and the power device is used to promote the gas in the gas space to flow through the beam provided with the internal gas path.

5. The battery system according to claim 3, characterized in that: The gas flow component further comprises a dustproof net, which is arranged at the inlet side of the power device, or in the flow channel of the gas path component, or at the inlet of the gas flow component.

6. The battery system according to claim 1, characterized in that: The gas flow component comprises a power device, which is arranged in the gas space and is used to promote the gas flow in the gas space.

7. The battery system according to claim 6, characterized in that: The gas flow component further comprises a heating device, which is disposed in the gas space and is used to promote the gas flow in the gas space.

8. The battery system according to claim 6, characterized in that: Also includes: The flow energy supply component comprises an energy supply member and an electric wire, wherein the energy supply member is electrically connected to the power device of the gas flow component through the electric wire.

9. The battery system according to claim 1, characterized in that: The monitoring component includes: at least one gas concentration sensor, and the gas concentration sensor is arranged inside the gas space.

10. The battery system according to claim 9, characterized in that: The gas concentration sensor is at least one of a dimethyl carbonate vapor sensor, a diethyl carbonate vapor sensor, an ethyl methyl carbonate vapor sensor, and a water vapor sensor.

11. The battery system according to claim 2, characterized in that: Also includes: A battery detection component is communicatively connected to the controller, and the battery detection component is disposed in the housing; the controller is further configured to control the operation of the gas flow component according to the signal of the monitoring component and the signal of the battery detection component.

12. The battery system according to claim 11, characterized in that: The battery detection component is a pressure sensor or a voltage sampling line or a flexible circuit board.

13. The battery system according to claim 2, characterized in that: Also includes: An early warning device is communicatively connected to the controller, and the early warning device is configured to alarm according to a signal from the controller; the controller is also configured to control the early warning device to alarm according to the signal from the monitoring component.

14. The battery system according to claim 2, characterized in that: The controller is a battery management system.

15. An electrical device, characterized in that: The electrical device comprises the battery system according to any one of claims 1 to 14.

Images