Gas treatment device, energy storage device, power supply device and electric equipment

Abstract

The utility model provides a gas treatment device, an energy storage device, a power supply device and electric equipment, and relates to the technical field of batteries. By adopting the gas treatment device with a simple structure in the scheme to treat exhaust gases such as combustible flue gas generated by thermal runaway of the battery unit, the local concentration of the combustible flue gas can be effectively reduced, the problem of burning explosion is not easily caused, and compared with a device for treating the combustible gas by adopting a liquid spraying system in the prior art, the gas treatment device has the advantages of simple structure and convenience in operation. The gas treatment device in the scheme is simpler in structure and lower in cost, and the problem of high-voltage short circuit of the battery pack caused by liquid spraying of an existing liquid spraying system can be solved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a gas processing device, an energy storage device, a power supply device, and an electrical device. Background Art

[0002] In recent years, new energy vehicles have developed by leaps and bounds. In the field of electric vehicles, power batteries, as the power source of electric vehicles, play an irreplaceable and important role. With the vigorous promotion of new energy vehicles, the demand for power battery products is also growing. Among them, batteries are of great significance in energy storage and energy supply. However, batteries also have high requirements for safety in use.

[0003] During the use of batteries, thermal runaway often occurs due to abnormal reasons such as weather, aging, overcharging, etc., and the exhaust gas emitted during thermal runaway is very likely to catch fire and burn after being discharged from the battery, and may even cause the battery to catch fire and explode. At present, in order to alleviate this problem, liquid can be sprayed through the spray system to treat the exhaust gas caused by thermal runaway, but these sprayed liquids may cause short circuits in the high-voltage circuit of the battery pack, which will then cause secondary disasters such as high-voltage ignition. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a gas processing device, an energy storage device, a power supply device and an electrical equipment, so as to improve the problem that the gas discharged by the thermal runaway of the battery is processed through a spray system, which may cause a short circuit in the high-voltage circuit.

[0005] In a first aspect, an embodiment of the present application provides a gas processing device for processing gas emitted by a battery cell during thermal runaway, the gas processing device comprising:

[0006] A processing chamber, and an air inlet pipe and an air outlet pipe connected to the processing chamber;

[0007] The air inlet pipe is used to introduce the gas into the processing chamber, and the air outlet pipe is used to discharge bubbles formed after the gas flows through the gas treatment agent in the processing chamber. The pipe opening position of the air outlet pipe is higher than the pipe opening position of the air inlet pipe.

[0008] In the above implementation process, a gas treatment device with a simple structure in the present scheme is used to treat combustible smoke and other gases generated by thermal runaway of the battery unit, and the gas can be dispersed and discharged by carrying the gas bubbles generated by the gas treatment agent, which can effectively reduce the local concentration of the combustible smoke and is not easy to cause combustion and explosion problems. Compared with the method of using a liquid spraying system to treat combustible gases in the prior art, the gas treatment device in the present scheme has a simpler structure and lower cost, and can also reduce the problem of high-voltage short circuit of the battery pack due to liquid spraying.

[0009] Optionally, the processing chamber includes a water level scale line, and the water level scale line is used to indicate the liquid level of the gas treatment agent. In this way, the gas can directly enter the gas treatment agent in the processing chamber through the air inlet pipe for processing, so as to enable the gas treatment agent to generate bubbles carrying gas, and then discharge the gas by discharging the bubbles.

[0010] Optionally, the air outlet pipe is arranged on the top and / or side wall of the processing chamber. If the air outlet pipe is arranged on the side wall of the processing chamber, the position of the air outlet pipe is higher than the position of the water level mark, which is conducive to discharging bubbles from the air outlet pipe.

[0011] Optionally, the processing chamber includes a drainage mechanism, and the drainage mechanism is used to drain the bubbles to the gas outlet pipe for discharge. In this way, the bubbles can be drained to the gas outlet pipe for smooth discharge.

[0012] Optionally, the drainage mechanism is a conical air collecting hood, and the top of the conical air collecting hood is connected to the air outlet pipe, so that the bubbles can be better drained to the air outlet pipe for discharge.

[0013] Optionally, the processing chamber includes a water level detector, which is used to detect the liquid level of the gas treatment agent, so as to output a prompt message when the water level of the gas treatment agent reaches a preset liquid level; the position of the air inlet pipe is not higher than the preset liquid level. In this way, it is convenient for the user to know the liquid level of the gas treatment agent and to easily control the placement capacity of the gas treatment agent.

[0014] Optionally, the processing chamber includes a liquid containing chamber, one end of the air intake pipe is connected to a box for loading the battery unit, and the other end of the air intake pipe is connected to the processing chamber, so that the gas can enter the liquid containing chamber through the air intake pipe. In this way, the gas in the box can be easily transferred to the processing chamber through the air intake pipe for processing.

[0015] Optionally, the gas inlet pipeline includes a plurality of branch pipes, and the branch pipes are used to disperse and discharge the gas into the liquid containing chamber. In this way, the gas can be dispersed and discharged into the liquid containing chamber, thereby making it easier to cause the gas treatment agent to generate more bubbles.

[0016] Optionally, the plurality of branch pipes extend into the liquid containing chamber; and / or, a plurality of openings are provided at a preset position at the end of each branch pipe. The openings at the end of the branch pipe can further disperse the gas, thereby making it easier for the gas treatment agent to generate more bubbles.

[0017] Optionally, a one-way valve is provided at the air inlet pipe, and the one-way valve allows the gas to enter the processing chamber when it is opened, so that the gas treatment agent is not easy to flow back to the battery unit side, ensuring the safety of the battery unit.

[0018] Optionally, the caliber of the gas outlet pipe is larger than the caliber of the gas inlet pipe. Thus, using a small-caliber gas inlet pipe to introduce gas into the gas treatment agent can help the gas treatment agent to generate more bubbles, and using a large-caliber gas outlet pipe can facilitate the discharge of bubbles.

[0019] In a second aspect, an embodiment of the present application provides an energy storage device, the energy storage device comprising:

[0020] A battery unit contained in a box and a gas processing device as provided in the first aspect above, wherein the gas processing device is disposed outside the box, and an air intake pipe of the gas processing device is connected to the box.

[0021] In a third aspect, an embodiment of the present application provides a power supply device, the power supply device comprising:

[0022] A box body, the box body comprises a storage space for accommodating a battery unit and a gas processing device as provided in the first aspect above, and an air intake pipe of the gas processing device is connected to the storage space.

[0023] In a fourth aspect, an embodiment of the present application provides an electrical device, wherein the electrical device includes the power supply device provided in the third aspect, and the electrical device is used to provide electrical energy.

[0024] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or be understood by practicing the embodiments of the present application. The purpose and other advantages of the present application can be realized and obtained by the structures specifically pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the structure of a gas processing device provided in an embodiment of the present application;

[0027] Figure 2 A schematic diagram of the structure of a drainage mechanism provided in an embodiment of the present application;

[0028] Figure 3 A schematic diagram of the structure of an air intake duct provided in an embodiment of the present application;

[0029] Figure 4 A schematic diagram of the structure of a branch pipe provided in an embodiment of the present application;

[0030] Figure 5 A schematic diagram of a connection structure between an air intake duct and a box body provided in an embodiment of the present application;

[0031] Figure 6 A schematic diagram of the structure of an energy storage device provided in an embodiment of the present application;

[0032] Figure 7 A schematic diagram of the structure of a power supply device provided in an embodiment of the present application.

[0033] Icons: 100-gas processing device; 110-processing chamber; 111-liquid containing chamber; 120-air inlet pipe; 130-air outlet pipe; 112-water level scale line; 113-drainage mechanism; 114-water level detector; 121-opening; 122-branch pipe; 140-connecting member; 200-energy storage device; 210-battery unit; 300-power supply device; 310-box; 312-accommodation space. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present application.

[0035] It should be noted that the term "multiple" in the embodiments of the present invention refers to two or more than two. In view of this, in the embodiments of the present invention, "multiple" can also be understood as "at least two". "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / ", unless otherwise specified, generally indicates that the associated objects before and after are in an "or" relationship.

[0036] During the use or energy storage of batteries, thermal runaway may often occur in battery cells due to abnormal reasons such as weather, aging, overcharging, etc., thereby generating a large amount of thermal runaway smoke. The thermal runaway smoke contains a large amount of flammable gases and substances. Therefore, in order to reduce the risk of battery use, the relevant technology can treat the thermal runaway smoke by setting up a liquid spraying system to reduce the concentration of the thermal runaway smoke. However, the liquid spraying may cause a short circuit in the high-voltage circuit of the battery pack, thereby causing secondary disasters such as high-voltage fires. Moreover, if the thermal runaway smoke is directly discharged, it is very easy to cause the risk of fire and explosion.

[0037] Based on the above problems, the present application proposes a gas treatment device, which is used to treat the gas emitted by thermal runaway of the battery cell. The gas treatment device includes a treatment chamber, and an air inlet pipe and an air outlet pipe connected to the treatment chamber. The air inlet pipe is used to introduce the gas into the treatment chamber. The gas flow only treats the gas treatment agent in the treatment chamber to form bubbles, which are discharged through the air outlet pipe. The bubbles can wrap the gas, so that the gas can be carried and discharged through the bubbles. In this way, the gas treatment device with a simple structure is used to treat the exhaust gas such as combustible smoke generated by thermal runaway of the battery cell, which can effectively reduce the local concentration of combustible smoke and is not prone to combustion and explosion problems. Compared with the device that uses a liquid spray system to treat combustible gases in the prior art, the gas treatment device in this scheme has a simpler structure and lower cost, and can also reduce the problem of high-voltage short circuit of the battery pack caused by liquid spraying from the existing liquid spray system.

[0038] The gas treatment device in the present application is used to treat the gas emitted by thermal runaway of the battery unit. The battery unit can refer to a battery, a battery cell, or a battery pack, a battery module, etc., wherein the battery cell can be a secondary battery, which refers to a battery cell that can be continuously used by activating the active material by charging after the battery cell is discharged. The battery cell can also be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiments of the present application do not specifically limit this.

[0039] A battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and removed between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.

[0040] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film.

[0041] As an example, the battery cell may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes but is not limited to a square-shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery, etc.

[0042] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.

[0043] In some embodiments, the battery may be a battery module. When there are multiple battery cells, the multiple battery cells may be arranged and fixed to form a battery module.

[0044] In some embodiments, the battery may be a battery pack, which includes a case and battery cells. The battery cells or battery modules may be accommodated in the case.

[0045] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0046] In some embodiments, the battery may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0047] The gas processing device of the present application can be used, but is not limited to, in electrical equipment such as vehicles, ships or aircraft. The power supply system of the electrical equipment can be composed of the gas processing device of the present application, batteries, etc., and the energy storage device for energy storage can also be composed of the gas processing device of the present application, batteries, etc. By processing the combustible gas discharged by thermal runaway of the battery unit through the gas processing device of this scheme, the risk of fire and explosion of the battery unit during use can be alleviated, so as to improve the reliability of the battery unit during use.

[0048] Combine the following Figure 1 The gas processing device 100 of the present application is introduced. Figure 1 A schematic structural diagram of a gas processing device 100 provided in an embodiment of the present application, wherein the gas processing device 100 is used to process the gas emitted by thermal runaway of a battery cell, and includes a processing chamber 110, and an air inlet pipe 120 and an air outlet pipe 130 connected to the processing chamber 110.

[0049] The gas inlet pipe 120 can be used to introduce gas into the processing chamber 110, and the gas outlet pipe 130 is used to discharge bubbles formed after the gas flows through the gas treatment agent. It can be understood that the gas treatment agent in this solution can generate bubbles under the impact of the gas, and the bubbles can wrap the gas, so that the gas is discharged from the gas outlet pipe 130 through the bubbles.

[0050] In order to facilitate the discharge of bubbles from the air outlet pipe 130, the pipe mouth position of the air outlet pipe 130 is higher than the pipe mouth position of the air inlet pipe 120. The pipe mouth position here can be understood as the position of the air outlet pipe 130 and the air inlet pipe 120 when the processing chamber is in a normal placement state, so that the air inlet pipe 120 can facilitate the introduction of gas into the processing chamber 110, and the pipe mouth position of the air outlet pipe 130 is set higher to facilitate the discharge of bubbles.

[0051] In some embodiments, the gas treatment agent in the present scheme can be a foaming liquid that is easy to generate bubbles, such as bubble water in the related art, which is mainly composed of water, surfactants, soluble polymer compounds and other ingredients. Surfactants can reduce the surface tension of water, making bubbles easier to form and remain stable. Common surfactants include stearic acid, glycerol, ethanol, polyethylene oxide, etc. Soluble polymer compounds generally include polymers, colloids and proteins, etc. These ingredients can increase the elasticity and plasticity of bubbles.

[0052] It can be understood that the gas treatment agent in this scheme can also be other types of liquids that are easy to foam, such as detergent, soapy water, laundry detergent water, etc., which are not listed one by one here. As long as it can easily generate bubbles so that the bubbles can wrap the gas and discharge it, it will be fine.

[0053] In some embodiments, the gas treatment agent in this solution may include a plurality of different types of liquids, which are placed in a layered structure in the treatment chamber 110. These liquids may be mutually immiscible or have different densities. For example, these liquids may include surfactants, water and glycerol, or may also include an aqueous solution of sodium stearate, or any combination of these. In this way, the gas may pass through multiple layers of liquid to stimulate the gas treatment agent to generate more bubbles, and then the gas may be quickly dispersed and discharged, thereby improving the discharge efficiency. Since the bubbles can be dispersed to various locations after being discharged, the local concentration of the gas can be reduced, thereby reducing the risk of combustion and explosion.

[0054] In some embodiments, the caliber of the gas outlet pipe 130 may be larger than the caliber of the gas inlet pipe 120, so that the small-caliber gas inlet pipe 120 is used to introduce the gas into the gas treatment agent, which can facilitate the gas treatment agent to generate more bubbles, and the large-caliber gas outlet pipe 130 can be used to facilitate the discharge of bubbles. In practical applications, the calibers of the gas outlet pipe 130 and the gas inlet pipe 120 can be flexibly set according to actual needs, for example, the calibers are set within a threshold range, so that the gas can be introduced into the processing chamber 110 and the bubbles can be discharged.

[0055] In some embodiments, a liquid containing chamber 111 may be provided in the processing chamber 110, and the liquid containing chamber 111 may be used to load a gas treatment agent. The gas generated by thermal runaway of the battery cell may include other substances such as flammable gas. These gases may enter the liquid containing chamber 111 of the processing chamber 110 through the air intake pipe 120. In order to enable the gas treatment agent to generate bubbles, the gas is wrapped by the bubbles and then discharged, and in this solution, the gas needs to enter other treatment agents. Figure 1In the structure shown, when treating gas, the water level of the gas treating agent should be higher than the position of the air inlet pipe 120 , so that the gas can directly enter the gas treating agent through the air inlet pipe 120 .

[0056] Of course, when designing the position of the air inlet pipe 120 , it can be designed to be below the middle of the processing chamber 110 , so that when the gas treatment agent is loaded, it is only necessary for the gas treatment agent to cover the position of the air inlet pipe 120 .

[0057] In some embodiments, the liquid containing chamber 111 inside the processing chamber 110 can be separately divided out for use with the gas treatment agent, that is, when processing the gas, the liquid containing chamber 111 needs to be filled with the gas treatment agent. At this time, the air intake pipe 120 is connected to the liquid containing chamber 111, so no matter how the position and height of the air intake pipe 120 are set, it can ensure that the gas directly enters the gas treatment agent after passing through the air intake pipe 120, thereby prompting the gas treatment agent to generate bubbles, and the gas is discharged after being wrapped by the bubbles.

[0058] In the above implementation process, the gas treatment device 100 with a simple structure in the present scheme is used to treat the combustible flue gas and other gases generated by the thermal runaway of the battery cell, and the gas can be dispersed and discharged by carrying the gas bubbles generated by the gas treatment agent, which can effectively reduce the local concentration of the combustible flue gas and is not easy to cause the problem of combustion and explosion. Compared with the method of using a liquid spraying system to treat combustible gases in the prior art, the gas treatment device in the present scheme has a simpler structure and lower cost, and can also reduce the problem of high-voltage short circuit of the battery pack due to liquid spraying.

[0059] On the basis of the above embodiment, the processing chamber 110 further includes a water level scale line 112, and the water level scale line 112 is used to indicate the liquid level of the gas treatment agent.

[0060] It can be understood that the water level mark 112 here refers to the liquid level of the gas treatment agent in the processing chamber 110 (such as the liquid holding chamber 111) when processing the gas. The water level mark 112 can be located on the inner wall or outer wall of the processing chamber 110. At the position of the water level mark 112, the processing chamber 110 can be set to a transparent material, so that the water level mark 112 can be exposed to the user, so that the user can observe the liquid level of the gas treatment agent through the water level mark 112, so that the user can know how much gas treatment agent needs to be added.

[0061] In some embodiments, the water level mark 112 may refer to the lowest water level mark 112, that is, the water level of the gas treatment agent may be higher than the water level mark 112, so that the gas treatment agent may be submerged in the air inlet pipe 120, so that the gas may be directly discharged into the gas treatment agent.

[0062] In some embodiments, in order to facilitate knowing the capacity of the gas treatment agent in the processing chamber 110, the water level scale line 112 may also include a minimum scale line and a maximum scale line, the minimum scale line may indicate the minimum water level of the gas treatment agent, the maximum scale line may indicate the maximum water level of the gas treatment agent, and the maximum scale line and the minimum scale line may be exposed to the outside, so that the user can clearly see the liquid level of the gas treatment agent poured into the liquid holding chamber 111. The minimum scale line can be used to limit the position of the air inlet pipe 120, that is, the position of the air inlet pipe 120 is not higher than the minimum scale line, and the maximum scale line can be used to limit the position of the air outlet pipe 130, that is, the position of the air outlet pipe 130 needs to be higher than the maximum scale line, so that it is convenient to discharge bubbles from the air outlet pipe 130.

[0063] In some embodiments, in order to facilitate the pouring of the gas treatment agent, a pouring port may be provided on the processing chamber 110, and the pouring port may be provided with a cover. When the gas treatment agent needs to be introduced, the cover is opened and the gas treatment agent is poured into the liquid holding chamber 111. After pouring, the cover can be closed to prevent the gas treatment agent from overflowing.

[0064] In the above implementation process, by setting a water level mark 112 in the processing chamber 110, the gas can directly enter the gas treatment agent through the air inlet pipe 120 for treatment, so as to enable the gas treatment agent to generate bubbles carrying gas, and then discharge the gas by discharging the bubbles.

[0065] On the basis of the above embodiment, the air outlet pipe 130 can be arranged on the top and / or side wall of the processing chamber 110, that is, the air outlet pipe 130 can be arranged on the top of the processing chamber 110, which can facilitate the discharge of bubbles. The air outlet pipe 130 can also be arranged on the side wall of the processing chamber 110. If the air outlet pipe 130 is arranged on the side wall of the processing chamber 110, in order to facilitate the discharge of bubbles, the position of the air outlet pipe 130 needs to be higher than the position of the above-mentioned water level mark 112, that is to say, the position of the air outlet pipe 130 cannot be lower than the position of the water level mark 112. If it is lower, the bubbles cannot be discharged.

[0066] There can be multiple outlet pipes 130, so that the bubbles wrapped in gas can be dispersed and discharged, thereby reducing the concentration of gas in the local area and reducing the risk of explosion. The shapes of the inlet pipe 120 and the outlet pipe 130 can be circular, oval, or square through holes. Of course, they can also be set to other shapes according to actual needs, and there is no special restriction here. The sizes of the outlet pipe 130 and the inlet pipe 120 can also be set according to actual needs. Of course, in order to ensure that the gas treatment agent can generate more bubbles, the inlet pipe 120 can be set smaller, and in order to ensure that the bubbles can be discharged smoothly, the outlet pipe 130 can be set larger.

[0067] For example, in order to facilitate the discharge of all bubbles, the gas outlet pipe 130 can be set larger, for example, the top of the processing chamber 110 is completely opened, and then the opening is used as the gas outlet pipe 130, in which case the bubbles can be discharged smoothly without being blocked by the top of the processing chamber 110. If the gas outlet pipe 130 is a through hole on the top or side wall of the processing chamber 110, in order to prevent the bubbles from being easily broken during the discharge process, the inner wall of the gas outlet pipe 130 can be made of a smooth material, that is, a smooth inner wall.

[0068] In some embodiments, in order to prevent the gas treatment agent from overflowing from the gas outlet pipe 130 when there is no treatment gas, the gas outlet pipe 130 may also be provided with a cover. When the gas is not being treated, the cover is closed, and when the gas needs to be treated, the cover is opened to discharge the bubbles from the gas outlet pipe 130.

[0069] On the basis of the above embodiment, in order to facilitate the drainage of bubbles to the gas outlet pipe 130 for discharge, as shown in FIG. Figure 2 As shown, the processing chamber 110 may include a drainage mechanism 113, which is used to drain the bubbles to the gas outlet pipe 130 for discharge.

[0070] The drainage mechanism 113 can be connected to the air outlet pipe 130 and the liquid holding chamber 111, and its purpose is to drain the bubbles in the liquid holding chamber 111 to the air outlet pipe 130, so as to achieve the purpose of smoothly discharging the bubbles.

[0071] On the basis of the above embodiment, the drainage mechanism 113 may be a conical air collecting hood, and the top of the conical air collecting hood is connected to the air outlet pipe 130 .

[0072] It can be understood that an opening is set at the top of the conical gas collecting hood, which can be connected to the gas outlet pipe 130. The downward opening of the conical gas collecting hood is connected to the liquid holding chamber 111, and the diameter of the downward opening can be larger than the diameter of the gas outlet pipe 130. This can better guide the bubbles of the gas treatment agent to the upper gas outlet pipe 130 for discharge.

[0073] In some other embodiments, the drainage mechanism 113 can be a small fan built into the inner wall of the processing chamber 110. The small fan can be turned on or off by an external controller. The small fan can blow towards the bubbles and also blow the bubbles to the outlet duct 130. For example, the outlet duct 130 is set on the right side wall of the processing chamber 110, and the small fan can be set on the left inner wall of the processing chamber 110. The small fan rotates, and the airflow can drive the bubbles to the outlet duct 130, thereby achieving the purpose of draining the bubbles to the outlet duct 130 for discharge.

[0074] It is understandable that the drainage mechanism 113 may also be other structures, as long as it can achieve the goal of draining the bubbles to the air outlet pipe 130 for discharge, and no examples are given here one by one.

[0075] On the basis of the above embodiment, a water level detector 114 may be further provided in the processing chamber 110. The water level detector 114 may be provided on the inner wall of the processing chamber 110 to detect the liquid level of the gas treatment agent, so that when the liquid level of the gas treatment agent reaches a preset liquid level, a prompt message is outputted, indicating that the position of the air intake pipe 120 is not higher than the preset liquid level.

[0076] The water level detector 114 can be connected to an external battery management system, and the battery management system can provide a display interface for the user, so that the water level detector 114 can send the detected liquid level of the gas treatment agent loaded into the liquid holding chamber 111 to the battery management system in real time and display it on the display interface. Alternatively, a maximum liquid level is set in the battery management system, and when the liquid level output by the water level detector 114 reaches the maximum liquid level, a prompt message can be output to the user through the display interface, so that the user can know the liquid level of the gas treatment agent and easily control the placement capacity of the gas treatment agent.

[0077] The water level detector 114 may be a float type water level detector, an ultrasonic water level detector, a pressure type water level detector, an electrode type water level detector, etc., or the water level detector may be other sensors that can detect liquid water levels, which are not listed here one by one.

[0078] Based on the above embodiments, Figure 3 As shown, one end of the air intake pipe 120 is connected to a box for loading battery cells, and the other end of the air intake pipe 120 is connected to the processing chamber 110 so that gas can enter the liquid containing chamber 111 through the air intake pipe 120 .

[0079] Among them, one end of the air intake pipe 120 is connected to the box body, so that the gas generated by thermal runaway of the battery cell can be directly transported from the air intake pipe 120 to the inside of the liquid holding chamber 111, so that the gas is gathered in the air intake pipe 120 and then discharged into the liquid holding chamber 111, reducing gas leakage.

[0080] In this embodiment, an air inlet may be provided on the processing chamber 110, and the air inlet pipe 120 may be understood as the terminal port at the other end of the air inlet. Of course, the air inlet pipe 120 may also be a separately provided component. For example, the air inlet pipe 120 extends through the air inlet into the processing chamber 110, which may encourage the gas treatment agent to generate more bubbles.

[0081] In some embodiments, the air intake pipe 120 can be understood as an air inlet. For example, a side wall of the processing chamber 110 is a side wall of the box body, so that the processing chamber 110 and the box body can be connected through the side wall, and then a hole is opened on the side wall as an air inlet, which can also serve as the air intake pipe 120. In this way, the gas after thermal runaway of the battery cell in the box body can directly enter the processing chamber 110 through the air inlet. At this time, in order to prevent the gas treatment agent in the processing chamber 110 from flowing back into the box body, a one-way valve can be set at the air inlet position to only allow the gas to flow into the processing chamber 110 in one direction.

[0082] It should be noted that in some scenarios, the air inlet pipe 120 and the air outlet pipe 130 mentioned in this solution do not strictly refer to one pipe, but may also refer to one opening. For example, the air outlet pipe 130 may also refer to an opening in the processing chamber 110, and the air inlet pipe 120 may also refer to an opening in the processing chamber 110.

[0083] In some embodiments, in order to reduce the backflow of the gas treatment agent into the air intake pipe 120, the air intake pipe 120 can extend into the processing chamber 110, and the shape in the processing chamber 110 can be bent downward to form a pipe so that its end port can be immersed in the gas treatment agent, that is, the position of its end port is not higher than the water level mark 112 of the gas treatment agent.

[0084] On the basis of the above-mentioned embodiment, a plurality of openings 121 may be provided at a preset position at the end of the air inlet pipe 120 extending into the processing chamber 110. The positions of the plurality of openings 121 are positions where the gas treatment agent is immersed, so the height of the preset position at the end of the air inlet pipe 120 should not be higher than the liquid level of the gas treatment agent, so that the plurality of openings 121 can be immersed in the gas treatment agent.

[0085] A plurality of openings 121 are arranged at the end of the air inlet pipe 120 along the circumference of the outer wall thereof, so that the gas flow rate can be large in and small out, which is beneficial to gas dispersion and can also enable the gas treatment agent to generate more bubbles.

[0086] Based on the above embodiments, Figure 4 As shown, in order to make the gas treatment agent more easily generate more bubbles under the impact of the gas, the above-mentioned air inlet pipe 120 may include a plurality of branch pipes 122, and the branch pipes 122 are used to disperse the gas into the liquid containing cavity 111 of the processing chamber 110.

[0087] In this embodiment, one end of the plurality of branch pipes 122 is connected to the box of the battery unit, and the other end can be connected to the processing chamber 110 .

[0088] In some embodiments, in order to reduce the reflux of the gas treatment agent into the air inlet pipe 120, a plurality of branch pipes 122 may extend into the processing chamber 110, and the shape in the processing chamber 110 may be bent downward to form a plurality of small pipes, the end openings of which can be immersed in the gas treatment agent, that is, the position of the end openings is not higher than the water level mark 112 of the gas treatment agent. In this way, the gas is discharged into the gas treatment agent through the plurality of branch pipes 122, which can generate more fine bubbles, making it easier to discharge the gas after being wrapped by the bubbles.

[0089] On the basis of the above-mentioned embodiment, a plurality of branch tubes 122 may extend into the liquid containing chamber 111 , and / or a plurality of openings may be provided at a preset position at the end of each branch tube 122 .

[0090] It can be understood that the preset end position of each branch pipe 122 can refer to the position immersed in the gas treatment agent, for example, its preset end position is not higher than the position of the above-mentioned water level scale line 112, so that its multiple openings can be immersed in the gas treatment agent, thereby dispersing and discharging the gas.

[0091] A plurality of openings are arranged at the end of the branch pipe 122 along the circumference of the outer wall thereof, so that the gas flow rate can be large in and small out, which is beneficial to gas dispersion and can also enable the gas treatment agent to generate more bubbles.

[0092] In other embodiments, the air intake duct 120 may also include a collecting pipe, a diverter plate and multiple branch pipes 122, one end of the collecting pipe is connected to the box body, and the other end of the collecting pipe is connected to the diverter plate. The collecting pipe is connected to the multiple branch pipes 122 through the diverter plate, and the multiple branch pipes 122 extend into the processing chamber 110.

[0093] The diverter plate here can be set on the processing chamber 110, and a diverter cavity is set in the diverter plate. The collecting pipe and multiple branch pipes 122 are connected through the diverter cavity. If these tubes are all circular tubes, the diameter of the diverter cavity can be larger than the diameter of the collecting pipe, so that the gas can be quickly dispersed to the multiple branch pipes 122 for discharge through the diverter cavity.

[0094] Multiple branch pipes 122 extend into the processing chamber 110, and their ends can penetrate into the gas treatment agent. In this way, the gas can be evenly transported into the gas treatment agent through the multiple branch pipes 122, so that the gas treatment agent can generate more bubbles to improve the gas processing efficiency.

[0095] Based on the above embodiments, Figure 5 ( Figure 5The air intake pipe 120 shown in the figure includes a plurality of branch pipes 122), and one end of the air intake pipe 120 connected to the box body of the battery unit can be connected to the box body through a connecting member 140, that is, the gas processing device 100 also includes a connecting member 140, and the connecting member 140 includes a switching structure and an explosion-proof valve, one end of the air intake pipe 120 is connected to the switching structure, the switching structure is connected to the explosion-proof valve, and the explosion-proof valve is connected to the box body.

[0096] Among them, the adapter structure can be used to connect the explosion-proof valve and the air intake pipe 120. When the battery unit thermally runs away and a large amount of gas is generated, the air pressure rises rapidly. At this time, the explosion-proof valve can be driven to open, and the gas can be transported to the processing chamber 110 through the air intake pipe 120 for processing, so as to reduce the risk of gas explosion in the box due to excessive air pressure.

[0097] In some embodiments, the above-mentioned transfer structure can be a filtering structure for filtering solid matter, liquid or coarse particles in the gas, so that the gas can be filtered and then passed into the processing chamber 110, which can reduce the problem of large particles entering the air intake pipe 120 and causing blockage of the air intake pipe 120.

[0098] On the basis of the above embodiment, in order to prevent the liquid treatment agent from flowing back into the liquid containing chamber 111 after the gas treatment agent is loaded into the liquid containing chamber 111, a one-way valve may be provided at the air inlet pipe 120. When the one-way valve is opened, the gas is allowed to enter the liquid containing chamber 111, that is, the one-way valve only allows the gas to enter the processing chamber 110 in one direction, and prevents the gas treatment agent from flowing back into the battery unit box or the above-mentioned air inlet pipe 120 through the air inlet pipe 120, thereby causing the problem that the gas cannot enter the processing chamber 110. Therefore, by providing a one-way valve in the air inlet pipe 120, only the gas is allowed to flow into the processing chamber 110, and the gas treatment agent is prevented from flowing back into the air inlet pipe 120.

[0099] The one-way valve mentioned above can be a one-way valve for the gas circuit, and the opening or closing of the one-way valve can be controlled by air pressure. For example, when a battery cell generates a large amount of gas due to thermal runaway, the air pressure in the left air intake duct 120 increases, driving the one-way valve to open, and the gas can enter the right processing chamber 110. After the gas is exhausted, the air pressure drops, driving the one-way valve to close. Alternatively, the one-way valve can be always in an open state, so that the gas can enter the processing chamber 110 for processing at any time.

[0100] like Figure 6 As shown, Figure 6A schematic structural diagram of an energy storage device 200 provided in an embodiment of the present application, the energy storage device 200 includes a battery cell 210 contained in a box body and the above-mentioned gas processing device 100, the gas processing device 100 is arranged outside the box body, and the air intake pipe 120 of the gas processing device 100 is connected to the box body, and the air intake pipe 120 is used to transport the gas generated by thermal runaway of the battery cell 210 to the processing chamber 110.

[0101] Among them, the box body is mainly used to accommodate the battery unit 210, and the structure of the connection between the air intake duct 120 and the box body can be various, such as being connected through the connecting member 140 in the above embodiment, or being connected through a pipe (such as the air intake duct 120), or the air intake duct 120 can be directly connected to the internal space of the box body, or the air intake duct 120 can be adjacent to the pressure relief mechanism arranged on the box body, so that when the pressure relief mechanism releases the pressure inside the box body, the gas emitted by the thermal runaway of the battery unit 210 can smoothly enter the processing chamber 110 through the air intake duct 120.

[0102] The energy storage device 200 may include multiple batteries (the batteries may include battery cells), and the boxes of the multiple batteries are all connected to the air intake pipe 120. The multiple batteries are arranged to improve the energy storage capacity of the energy storage device 200, and the boxes of the multiple batteries are all connected to the gas processing device 100, so that the multiple batteries can share one gas processing device 100, thereby improving the reliability of the energy storage device 200 and also helping to reduce the manufacturing cost of the energy storage device 200.

[0103] Please refer to Figure 7 , Figure 7 A structural schematic diagram of a power supply device 300 provided in an embodiment of the present application, the power supply device 300 includes a box body 310, the box body 310 includes a accommodating space 312 for accommodating a battery unit and the above-mentioned gas processing device 100, and the air intake pipe 120 of the gas processing device 100 is connected to the accommodating space.

[0104] The processing chamber 110 of the gas processing device 100 is located inside the box body 310. The storage space 312 inside the box body 310 can be used to accommodate battery units. If the battery unit is a battery monomer, the battery monomer can be one or more. When there are multiple battery monomers, the multiple battery monomers can be connected in series, in parallel, or mixed (both in series and in parallel). These multiple battery monomers are connected in series or in parallel to form a battery unit placed in the storage space of the box body.

[0105] It can be understood that the specific structure of the box body 310 can be flexibly set according to actual needs. For example, a box cover and a main body can be provided, and the battery unit and the gas processing device 100 can be placed in the main body. The box cover and the main body are hinged, so that the main body can be opened and closed.

[0106] In some embodiments, a partition may be provided in the box body 310, and the air intake duct 120 is provided on the partition. The internal space of the box body can be divided into a receiving space 312 and a processing chamber 110 through the partition. In this way, the air intake duct 120 can directly connect the receiving space 312 and the processing chamber 110, and the gas generated by thermal runaway of the battery cell can quickly enter the processing chamber 110 for processing.

[0107] It is understandable that the number of the air intake ducts 120 may be one or more. For example, a plurality of air intake ducts 120 may be provided on the partition, which can increase the rate at which the gas is discharged from the accommodation space.

[0108] In this implementation, a one-way valve may be provided at the air inlet pipe 120 to prevent the gas treatment agent in the processing chamber 110 from flowing back into the accommodation space.

[0109] The embodiment of the present application further provides an electrical device, which includes the above-mentioned power supply device 300 and is used to provide electrical energy.

[0110] The electrical equipment may be, but is not limited to, mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc.

[0111] For the convenience of explanation, an electrical device in one embodiment of the present application is taken as an example of a vehicle. The vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A power supply device 300 is provided inside the vehicle, and the power supply device 300 can be arranged at the bottom of the vehicle, or at the head of the vehicle, or at the tail of the vehicle. The power supply device 300 can be used for powering the vehicle. For example, the power supply device 300 can be used as an operating power supply or a use power supply for the vehicle, such as for starting, navigating and driving the vehicle.

[0112] In some embodiments of the present application, the power supply device 300 can not only serve as the operating power source or use power source of the vehicle, but also serve as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0113] In summary, the embodiments of the present application provide a gas processing device, an energy storage device, a power supply device and an electrical equipment. The gas processing device is used to process the gas emitted by thermal runaway of the battery cell. The gas processing device includes a processing chamber, and an air inlet pipe and an air outlet pipe connected to the processing chamber. The air inlet pipe is used to introduce the gas into the processing chamber. The gas flows through the gas treatment agent in the processing chamber to form bubbles, which are discharged through the air outlet pipe. In this way, the gas processing device with a simple structure is used to process the exhaust gas such as combustible smoke generated by thermal runaway of the battery cell, which can effectively reduce the local concentration of combustible smoke and is not prone to combustion and explosion problems. Compared with the device in the prior art that uses a liquid spray system to treat combustible gases, the gas processing device in this scheme has a simpler structure and lower cost, and can also reduce the problem of high-voltage short circuit of the battery pack caused by liquid spraying from the existing liquid spray system.

[0114] In the embodiments provided in the present application, it should be understood that, unless otherwise clearly specified and limited, the terms "coupled", "connected" and other words describing the connection relationship should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0115] Furthermore, the functional modules in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0116] In this document, relational terms such as first and second, etc. are used merely to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0117] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A gas processing device, characterized in that: Used to treat the gas discharged by thermal runaway of a battery cell, the gas treatment device comprises: A processing chamber, and an air inlet pipe and an air outlet pipe connected to the processing chamber; The air inlet pipe is used to introduce the gas into the processing chamber, and the air outlet pipe is used to discharge bubbles formed after the gas flows through the gas treatment agent in the processing chamber. The pipe opening position of the air outlet pipe is higher than the pipe opening position of the air inlet pipe.

2. The gas processing device according to claim 1, characterized in that: The processing chamber is provided with a water level scale line, and the water level scale line is used to indicate the liquid level of the gas processing agent.

3. The gas processing device according to claim 2, characterized in that: The air outlet pipe is arranged on the top and / or the side wall of the processing chamber. If the air outlet pipe is arranged on the side wall of the processing chamber, the position of the air outlet pipe is higher than the position of the water level mark.

4. The gas processing device according to claim 1, characterized in that: The processing chamber comprises a drainage mechanism, and the drainage mechanism is used to drain the bubbles to the gas outlet pipe for discharge.

5. The gas processing device according to claim 4, characterized in that: The drainage mechanism is a conical air collecting hood, and the top of the conical air collecting hood is connected to the air outlet pipe.

6. The gas processing device according to claim 1, characterized in that: The processing chamber includes a water level detector, which is used to detect the liquid level of the gas treatment agent, so as to output a prompt message when the liquid level of the gas treatment agent reaches a preset liquid level; the position of the air intake pipe is not higher than the position of the preset liquid level.

7. The gas processing device according to claim 1, characterized in that: The processing chamber includes a liquid containing chamber, one end of the air intake pipe is connected to a box for loading the battery cell, and the other end of the air intake pipe is connected to the processing chamber so that the gas can enter the liquid containing chamber through the air intake pipe.

8. The gas processing device according to claim 7, characterized in that: The air inlet pipeline includes a plurality of branch pipes, and the branch pipes are used to disperse and discharge the gas into the liquid containing chamber.

9. The gas processing device according to claim 8, characterized in that: The plurality of branch pipes extend into the liquid containing chamber; and / or, a plurality of openings are arranged at a preset position at the end of each branch pipe.

10. The gas processing device according to any one of claims 1 to 9, characterized in that: A one-way valve is provided at the air inlet pipeline, and when the one-way valve is opened, the gas is allowed to enter the processing chamber.

11. The gas processing device according to any one of claims 1 to 9, characterized in that: The diameter of the air outlet pipe is larger than the diameter of the air inlet pipe.

12. An energy storage device, characterized in that: The energy storage device comprises: A battery unit contained in a box and a gas processing device as claimed in any one of claims 1 to 11, wherein the gas processing device is arranged outside the box, and an air intake pipe of the gas processing device is connected to the box.

13. A power supply device, characterized in that: The power supply device comprises: A box body, the box body comprising a storage space for accommodating a battery unit and a gas processing device as described in any one of claims 1 to 11, wherein an air intake pipe of the gas processing device is connected to the storage space.

14. An electrical device, characterized in that: The electrical equipment comprises the power supply device according to claim 13, and the electrical equipment is used to provide electrical energy.

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