Battery and electric equipment

Abstract

The invention relates to a battery and electric equipment, and belongs to the technical field of battery equipment. The battery comprises: a housing, which is provided with an inner cavity; the battery monomers are mounted in the inner cavity, and each battery monomer is provided with a pressure relief mechanism; the first partition plate is mounted in the shell to divide the inner cavity into a first chamber and a second chamber, the battery monomers are mounted in the first chamber, the first partition plate is provided with a first through hole, and the first chamber is communicated with the second chamber through the first through hole; the pressure relief mechanism is arranged opposite to the first through hole, so that flue gas discharged by the pressure relief mechanism from the battery monomers flows into the second cavity; and the flue gas treatment device is mounted in the second cavity and is used for treating the flue gas flowing into the second cavity and discharging the treated flue gas to the outside of the battery. By applying the technical scheme of the invention, the problems that the smoke generated when the battery is subjected to thermal runaway pollutes the environment, and the physical health of personnel is greatly harmed are solved.

Description

[0001] This invention patent application is divided based on the invention patent application filed on July 11, 2023, with application number 202310843634.2 and invention name “Batteries and Electrical Equipment” as the parent case. Technical Field

[0002] The present application belongs to the technical field of battery equipment, and in particular, relates to a battery and electrical equipment. Background Art

[0003] During the use of new energy batteries, there is a possibility of thermal runaway. When a new energy battery has thermal runaway, the battery cells of the new energy battery will emit high-temperature smoke. After the high-temperature smoke is discharged, the smoke is initially located inside the shell. However, once the high-temperature smoke leaks out of the shell or is discharged to the outside, the high-temperature smoke combines with the air. When the concentration of solid particles and / or liquid in the smoke reaches a certain level and under the action of high temperature, black smoke and / or white mist are easily generated. Moreover, the smoke contains toxic substances, and the pollution hazard of the smoke is relatively large. Once the smoke leaks or is discharged to the outside, it will not only pollute the environment, but also cause harm to the health of people. Summary of the invention

[0004] The purpose of the present application is to provide a battery and electrical equipment, aiming to solve the problem that the smoke generated when the battery has thermal runaway will cause great harm to the environment and the health of personnel.

[0005] To achieve the above purpose, the technical solution adopted in this application is: a battery, comprising:

[0006] a housing, forming an inner cavity;

[0007] A battery cell is installed in the inner cavity, and the battery cell is provided with a pressure relief mechanism;

[0008] a first partition, installed in the housing to separate the inner cavity into a first chamber and a second chamber, the battery cell is installed in the first chamber, the first partition is provided with a first through hole, the first chamber and the second chamber are connected through the first through hole, and the pressure relief mechanism is arranged opposite to the first through hole so that the smoke discharged from the battery cell through the pressure relief mechanism flows into the second chamber;

[0009] The flue gas treatment device is installed in the second chamber, and is used for treating the flue gas flowing into the second chamber and then discharging it to the outside of the battery.

[0010] After the flue gas is treated, the harmfulness of the flue gas is reduced, and then the flue gas is discharged to the outside of the battery, reducing or even avoiding the harm of the flue gas to the life and health of users and other personnel, thereby protecting the life and health safety of users and other personnel.

[0011] In some embodiments, the smoke treatment device includes a cooling unit, which is used to cool the smoke flowing into the second chamber. When the smoke flows into the second chamber, the cooling unit will perform heat exchange on the smoke, thereby reducing the temperature of the smoke.

[0012] In some embodiments, the cooling unit includes an exhaust baffle, which is installed in the second chamber, and the exhaust baffle and the first partition are arranged at intervals to form a first flow channel for guiding the smoke flowing into the second chamber, and the first flow channel is connected to the first through hole. By arranging the exhaust baffle and forming the flow channel, most or even all of the smoke flowing into the second chamber is guided to the cooling unit for heat exchange, so that the smoke can be cooled and the temperature can be reduced to reduce the possibility of smoke combustion.

[0013] In some embodiments, the first partition plate and / or the exhaust baffle plate is configured as a liquid cooling plate, and the liquid cooling plate is used to perform heat exchange on the flue gas flowing into the first flow channel to cool the flue gas. The flue gas flowing into the first flow channel can perform heat exchange with the liquid cooling plate, so that the flue gas can be cooled to a greater extent, further reducing the possibility of flue gas combustion.

[0014] In some embodiments, a plurality of second partitions are provided in the first flow channel, and two adjacent second partitions are spaced apart; one end of each second partition abuts against the first partition, and / or the other end of each second partition abuts against the exhaust baffle; the first interval space formed between two adjacent second partitions is connected to form the first flow channel. The first flow channel formed by the second partition increases the distance along which the flue gas flows, that is, the flue gas flows in the flow channel for a longer time, which is beneficial to the cooling of the flue gas; in addition, when the first partition and / or the exhaust baffle are set as a liquid cooling plate, the flue gas contacts the liquid cooling plate for a longer time for heat exchange, so that the liquid cooling plate can be used to more fully exchange heat with the flue gas, and the liquid cooling plate can take away more heat to cool the flue gas.

[0015] In some embodiments, a plurality of first interval spaces are connected end to end in sequence. In this way, the distance along which the flue gas flows in the first flow channel is further increased, which is beneficial for cooling the flue gas; in addition, when the first partition plate and / or the exhaust baffle plate is set as a liquid cooling plate, the flue gas can fully contact the liquid cooling plate, thereby improving the cooling efficiency.

[0016] In some embodiments, the second partition is a plate made of metal material, including but not limited to copper, aluminum, steel, etc. This can further improve the effect of flue gas cooling and allow the flue gas to take away as much heat as possible.

[0017] In some embodiments, the battery further includes a liquid pump, which is used to transport coolant to the liquid cooling plate. A pressure sensor and / or a temperature sensor are installed in the first flow channel, and the pressure sensor and / or the temperature sensor are electrically connected to the liquid pump. The liquid pump detects an increase in pressure in the first flow channel based on the pressure sensor, and then adjusts the flow rate and flow rate of the transported coolant, such as increasing the flow rate and flow rate of the transported coolant. And / or, the liquid pump detects an increase in temperature in the first flow channel based on the temperature sensor, and then adjusts the flow rate and flow rate of the transported coolant, such as increasing the flow rate and flow rate of the transported coolant. By increasing the flow rate and flow rate of the coolant in the liquid cooling plate, the cooling circulation of the coolant is increased, thereby improving the efficiency of removing heat from the flue gas flowing into the flow channel, so that the flue gas flowing into the flow channel can be quickly cooled and cooled.

[0018] In some embodiments, the cooling unit further includes a heat absorbing structure, which is disposed on a side of the exhaust baffle away from the first partition, and is connected to the first flow channel, and is used to absorb the heat of the flue gas. The flue gas flows to the heat absorbing structure for further cooling, thereby further reducing the possibility of combustion of the flue gas flowing into the second chamber.

[0019] In some embodiments, the heat absorption structure includes a first medium and a second medium, a storage space is provided on a side of the exhaust baffle away from the first partition, the storage space is communicated with the first flow channel, the first medium and the second medium are both arranged in the storage space, and when the smoke flows into the storage space, the first medium and the second medium contact each other and undergo an endothermic reaction to absorb the heat of the smoke. When the first medium and the second medium contact, the two can undergo an endothermic reaction, thereby absorbing the heat of the high-temperature smoke, so as to quickly cool the high-temperature smoke.

[0020] In some embodiments, the heat absorption structure further includes a third partition, which is disposed in the accommodation space to separate the accommodation space into a first accommodation chamber and a second accommodation chamber, the first medium is disposed in the first accommodation chamber, the second medium is disposed in the second accommodation chamber, the first accommodation chamber is connected to the first flow channel, and when smoke flows into the first accommodation chamber, the first accommodation chamber and the second accommodation chamber are connected so that the first medium and the second medium contact each other and undergo an endothermic reaction to absorb the heat of the smoke. When smoke flows into the first accommodation chamber along the first flow channel, the first accommodation chamber and the second accommodation chamber can release the separation effect of the third partition and communicate, so that the first medium and the second medium can contact each other, thereby undergoing an endothermic reaction to absorb the heat of the smoke.

[0021] In some embodiments, the first accommodating chamber is located below the second accommodating chamber, and a first inlet is provided on the bottom wall of the first accommodating chamber, and the first accommodating chamber is connected to the first flow channel through the first inlet. By providing the first inlet, smoke can smoothly enter the first accommodating chamber.

[0022] In some embodiments, there are multiple first inlets, and the multiple first inlets are arranged in an array. Such a design can be more conducive to the smooth entry of smoke into the first containing cavity.

[0023] In some embodiments, a second inlet is provided on the side wall of the first accommodating chamber, and the first accommodating chamber is connected to the first flow channel through the second inlet. By providing the second inlet, smoke can smoothly enter the first accommodating chamber.

[0024] In some embodiments, the first medium is ammonium chloride and the second medium is water. Ammonium chloride is a material that is easy to purchase and obtain on the market, and the price is cheap, and water can be directly obtained, so the production cost of the battery can be reduced, forming a low-cost advantage.

[0025] In some embodiments, a second through hole is provided on the third partition, and a control valve is installed in the second through hole, and the control valve is used to open when smoke flows into the first accommodating chamber to connect the first accommodating chamber with the second accommodating chamber. The method of opening the control valve on the third partition to connect the first accommodating chamber with the second accommodating chamber is an active opening method, and the control valve responds sensitively and quickly, so that the second medium in the second accommodating chamber flows into the first accommodating chamber to contact the first medium, and an endothermic reaction occurs to absorb the heat of the smoke, thereby cooling the smoke.

[0026] In some embodiments, a second through hole is provided on the third partition plate, and a plugging piece made of a hot-melt material is installed in the second through hole. When smoke flows into the first accommodation cavity, the plugging piece is heated and melted to connect the first accommodation cavity and the second accommodation cavity. The high-temperature smoke melts the plugging piece made of the hot-melt material, so that the second medium in the second accommodation cavity flows into the first accommodation cavity through the second through hole and contacts the first medium. The second medium and the first medium undergo an endothermic reaction to absorb the heat of the smoke, thereby cooling the smoke.

[0027] In some embodiments, the third partition is a plate made of a hot-melt material. When smoke flows into the first accommodation chamber, the third partition is heated and melted to connect the first accommodation chamber and the second accommodation chamber. The third partition made of hot-melt material can be melted through when contacted by high-temperature smoke, so that the second medium in the second accommodation chamber flows into the first accommodation chamber and contacts the first medium, and generates an endothermic reaction to absorb the heat of the smoke, thereby cooling the smoke.

[0028] In some embodiments, a plurality of cooling units are provided, and the plurality of cooling units are sequentially connected. The plurality of cooling units are used to cool down the high-temperature flue gas, thereby further reducing the possibility of flue gas combustion.

[0029] In some embodiments, the smoke treatment device includes a separation unit, which is used to separate solid particles and / or liquids in the smoke flowing into the second chamber. The separation unit is designed in the smoke treatment device, and when the smoke flows into the second chamber, the separation unit will separate and filter the solid particles and / or liquids in the smoke, thereby reducing the concentration of solid particles and / or liquids in the smoke.

[0030] In some embodiments, the smoke treatment device includes a separation unit, the separation unit is used to separate solid particles and / or liquids in the smoke flowing into the second chamber, the separation unit is connected to the cooling unit, and the separation unit is located downstream of the cooling unit along the flow direction of the smoke. When the smoke is discharged from the pressure relief mechanism and flows into the second chamber through the first through hole, the cooling unit first cools the smoke, and the cooled smoke flows into the separation unit to be separated and filtered, thereby reducing the concentration of solid particles and / or liquids in the smoke.

[0031] In some embodiments, the separation unit includes an adsorption filter structure, which is used to adsorb and filter solid particles and / or liquids in the smoke, thereby reducing the concentration of solid particles and / or liquids in the smoke.

[0032] In some embodiments, the adsorption filtration structure includes at least one of activated carbon filter cotton, activated carbon filter mesh, and honeycomb ceramic filter material.

[0033] In some embodiments, the separation unit further includes a plurality of fourth baffles, which are installed in the second chamber, two adjacent fourth baffles are arranged at intervals, and the second interval space formed between the two adjacent fourth baffles is interconnected to form a second flow channel, and the adsorption and filtration structure is arranged in the second flow channel. The second flow channel formed by the plurality of fourth baffles increases the distance along which the smoke flows through the adsorption and filtration structure, thereby further adsorbing and filtering the solid particles and / or liquid in the smoke, so that the concentration of the solid particles and / or liquid in the smoke is lower.

[0034] In some embodiments, the plurality of second spaces are connected end to end in sequence, so that the distance along the second flow channel can be further increased, and the adsorption and filtration structure can more fully adsorb and filter the solid particles and / or liquid in the smoke, thereby improving the adsorption and filtration efficiency of the solid particles and / or liquid in the smoke.

[0035] In some embodiments, there are multiple separation units, and the multiple separation units are sequentially connected, thereby further improving the adsorption and filtration efficiency of solid particles and / or liquids in the smoke.

[0036] In some embodiments, the shell is provided with an exhaust hole, and the exhaust hole is used to discharge the smoke treated by the smoke treatment device to the outside of the battery.

[0037] According to another aspect of the embodiment of the present application, an electric device is provided, which includes the battery as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0039] Figure 1 An exploded schematic diagram of a battery according to some embodiments of the present application;

[0040] Figure 2 for Figure 1 A schematic cross-sectional view of a battery is shown;

[0041] Figure 3 for Figure 2 A partial cross-sectional schematic diagram of a battery is shown;

[0042] Figure 4 for Figure 3 The enlarged schematic diagram of point B in the middle;

[0043] Figure 5 for Figure 2 Schematic cross-sectional view along the AA direction;

[0044] Figure 6 for Figure 5 The enlarged schematic diagram of the center C;

[0045] Figure 7 for Figure 5 The enlarged schematic diagram of point D in the middle;

[0046] Figure 8 An exploded schematic diagram of a battery according to some embodiments of the present application;

[0047] Fig. 9 for Figure 8 A schematic diagram of assembling the exhaust baffle and each second separator in the battery shown;

[0048] Fig.10 An exploded schematic diagram of a battery according to some embodiments of the present application;

[0049] Fig.11 A schematic diagram of the structure of an electrical device according to an embodiment of the present application.

[0050] Among them, the reference numerals in the figure are:

[0051] 200. Battery;

[0052] 10. Shell; 11. Inner cavity; 111. First chamber; 112. Second chamber; 12. Battery explosion-proof valve; 13. Cover plate; 14. Inner cavity space;

[0053] 20. Battery cell; 21. Pressure relief mechanism;

[0054] 30. a first partition; 31. a first through hole;

[0055] 40. Flue gas treatment device; 41. Cooling unit; 411. Exhaust damper; 412. First flow channel; 413. Second partition; 4130. First spacing space; 42. Heat absorption structure; 421. Accommodation space; 4211. First accommodation chamber; 4212. Second accommodation chamber; 4213. First inlet; 4214. Second inlet; 4215. Flow outlet; 422. Third partition; 4221. Control valve; 4221′. Blocking member; 423. First medium; 424. Second medium; 43. Separation unit; 431. Adsorption and filtration structure; 432. Fourth partition; 4320. Second spacing space; 433. Second flow channel;

[0056] 51. Liquid pump; 52. Pressure sensor;

[0057] 60. Separation equipment;

[0058] 100. Electrical equipment. DETAILED DESCRIPTION

[0059] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0060] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0061] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the feature. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0062] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between 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.

[0063] At present, new energy, that is, renewable energy, is becoming more and more important in social development, and the application and popularization of new energy is also developing rapidly. New energy includes but is not limited to solar energy, wind energy, geothermal energy, tidal energy, etc. These renewable energy sources are converted into electrical energy that is easy to store and use, and are applied to all walks of life through electrical energy output. If you want to store the electrical energy converted from renewable energy, you cannot do without new energy batteries. New energy batteries include but are not limited to lithium batteries, nickel-hydrogen batteries, lead-acid batteries, etc. Among them, lithium batteries have more outstanding advantages than other types of batteries. Therefore, various enterprises, institutions, research institutes, etc. are vigorously developing lithium batteries. Hereinafter, new energy batteries are collectively referred to as batteries.

[0064] Generally, a battery includes a housing 10 and at least one battery cell 20. Most batteries are equipped with multiple battery cells 20 to meet the demand for large power. In the following, the battery is described as being equipped with multiple battery cells 20. The housing 10 is formed with an inner cavity 11, and multiple battery cells 20 are centrally installed in the inner cavity 11. Figure 1 A plurality of battery cells 20 are electrically connected in parallel, in series or in a combination of series and parallel, so as to output electric energy with a required output voltage and output current.

[0065] During the use of the battery, it is inevitable that the battery will age after a period of use, or the battery temperature will continue to rise during use, or the battery will be affected by sudden changes in the use environment (such as overcharge, over discharge, extrusion, collision and other abnormal use environments). The above factors may cause the battery cell 20 of the battery to be prone to thermal runaway. When the battery cell 20 has thermal runaway, in addition to causing high temperature risks (that is, combustion risks), it will also be accompanied by the generation of CO, HF, HCl, Cx H y Toxic and harmful gases such as Ni, Co, and Mn, as well as solid particles and / or liquids containing toxic and harmful heavy metals such as Ni, Co, and Mn, these substances and gases mix to eventually form flue gas. If these flue gases accumulate in the inner cavity 11, the pressure, concentration of solid particles and / or liquids in the inner cavity 11 will instantly increase sharply. Therefore, the flue gas generated when the battery cell 20 has thermal runaway must be effectively discharged from the inner cavity 11.

[0066] In the related art, the smoke generated when the battery cell 20 has thermal runaway is directly discharged from the inner cavity 11. The direct discharge method is the simplest and fastest method, but the direct discharge method does not reduce the toxicity of the smoke. The directly discharged smoke will pollute the environment and endanger the life and health of users and other personnel.

[0067] In order to reduce the harmfulness of the smoke generated when the battery cell 20 has thermal runaway, the battery provided in the embodiment of the present application adopts a method of discharging the smoke after treatment. The method of discharging the smoke after treatment can formulate a corresponding treatment method according to actual needs, which can reduce the harmfulness of the smoke, protect the environment, and protect the life and health of users and other personnel.

[0068] like Figure 1 and Figure 2 As shown, the battery 200 provided in the embodiment of the present application includes a housing 10, a battery cell 20, a first separator 30 and a flue gas treatment device 40. The housing 10 is formed with an inner cavity 11, and the battery cell 20 is installed in the inner cavity 11. In the embodiment of the present application, as shown in FIG. Figure 1 As shown, a battery cell 20 is used as a diagram for explanation. The battery cell 20 is provided with a pressure relief mechanism 21. In the embodiment of the present application, the first partition 30 is installed in the shell 10, and the first partition 30 divides the inner cavity 11 into a first chamber 111 and a second chamber 112. The battery cell 20 is installed in the first chamber 111. The first partition 30 is provided with a first through hole 31, and the first chamber 111 and the second chamber 112 are connected through the first through hole 31. The pressure relief mechanism 21 is arranged opposite to the first through hole 31, and the smoke generated in the battery cell 20 is discharged from the pressure relief mechanism 21, and the smoke discharged from the battery cell 20 flows into the second chamber 112 through the first through hole 31. The smoke treatment device 40 is installed in the second chamber 112, and the smoke treatment device 40 is used to treat the smoke flowing into the second chamber 112. After the smoke is treated, the harmfulness of the smoke is reduced, and then the smoke is discharged to the outside of the battery 200, reducing or even avoiding the harm of the smoke to the life and health of users and other personnel, thereby protecting the life and health safety of users and other personnel.

[0069] In some embodiments, the housing 10 is assembled with a bottom plate, a cover plate 13, and four side panels to form a rectangular or cube-shaped housing (wherein the bottom plate and the four side panels are assembled to form an inner cavity space 14), and the inner cavity 11 is correspondingly a rectangular or cube-shaped inner cavity space 14. At this time, each battery cell 20 correspondingly adopts a rectangular or cube-shaped outer contour. In this way, each battery cell 20 can fit into the inner cavity 11, so that more battery cells 20 can be installed in the limited space of the inner cavity 11, thereby improving the energy efficiency of the battery.

[0070] In other embodiments, the housing 10 is a regular polygonal prism-shaped housing formed by assembling a bottom plate, a cover plate 13, and a plurality of side panels (wherein the bottom plate and the plurality of side panels are assembled to form an inner cavity space 14), and the inner cavity 11 is a regular polygonal prism-shaped inner cavity space 14. Alternatively, the housing 10 is a cylindrical housing formed by assembling a bottom plate, a cover plate 13, and a side panel (wherein the bottom plate and a side panel are assembled to form an inner cavity space 14), and the inner cavity 11 is a cylindrical inner cavity space 14. In this case, each battery cell 20 has a cylindrical outer contour. In this way, each cylindrical battery cell 20 can fit into the regular polygonal prism-shaped or cylindrical inner cavity 11, so that a larger number of battery cells 20 can be installed in the limited space of the inner cavity 11, thereby improving the energy efficiency of the battery.

[0071] In some embodiments, the housing 10 is made of aluminum. Aluminum has better ductility and plasticity than other metal materials (for example, compared to iron), and the housing 10 made of aluminum is also lighter. In addition, the structural strength of the housing 10 made of aluminum is sufficient to meet the structural strength requirements of battery assembly.

[0072] The pressure relief mechanism 21 refers to an element or component that is actuated to release the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a predetermined threshold. Among them, "actuation" means that the pressure relief mechanism 21 is in action, so that the internal pressure and temperature of the battery cell 20 can be released. The action produced by the pressure relief mechanism 21 may include but is not limited to: at least a part of the pressure relief mechanism 21 is broken, torn or melted, etc. After the pressure relief mechanism 21 is actuated, the high-temperature flue gas inside the battery cell 20 will be discharged from the pressure relief mechanism 21 to the outside. The predetermined threshold value can be adjusted according to different design requirements. The predetermined threshold value may depend on one or more materials of the positive electrode plate, the negative electrode plate, the electrolyte and the separator in the battery cell 20. The pressure relief mechanism 21 can adopt, for example, pressure-sensitive or temperature-sensitive elements or components, that is, when the internal pressure or temperature of the battery cell 20 reaches a predetermined threshold value, the pressure relief mechanism 21 is actuated to form a channel for internal pressure release. The pressure relief mechanism 21 and the first through hole 31 are arranged relative to each other in the following specific aspects: the pressure relief mechanism 21 and the first through hole 31 are arranged opposite each other, that is, the pressure relief mechanism 21 and the first through hole 31 are directly connected; or, a connecting channel is provided on the side of the first partition plate 30 facing away from the second chamber 112, the connecting channel is connected to the first through hole 31, and the pressure relief mechanism 21 and the connecting channel are arranged relative to each other.

[0073] like Figure 2 As shown, the flue gas treatment device 40 of the battery 200 of the embodiment of the present application includes a cooling unit 41, and the cooling unit 41 is used to cool the flue gas flowing into the second chamber 112. When the battery cell 20 is in thermal runaway, high-temperature flue gas is generated in the battery cell 20, and the generated flue gas contains solid particles and / or liquids such as Ni, Co, and Mn. When the flue gas is discharged from the pressure relief mechanism 21 and flows into the second chamber 112 through the first through hole 31, the temperature and pressure in the second chamber 112 rise sharply, and the concentration of solid particles and / or liquid in the flue gas increases. At this time, if the cavity wall of the second chamber 112 is broken under the action of the flue gas pressure, the flue gas with increased concentration of solid particles and / or liquid will combine with oxygen in the air, and under the high temperature condition of the flue gas, it may cause combustion. Therefore, a cooling unit 41 is designed in the flue gas treatment device 40. When the flue gas flows into the second chamber 112, the cooling unit 41 will perform heat exchange on the flue gas flowing into the second chamber 112, thereby reducing the temperature of the flue gas. Even if the housing 10 is ruptured due to the rapidly increased pressure so that the smoke contacts the air, the temperature of the smoke has been lowered by heat exchange with the cooling unit 41, so the possibility of the smoke burning can be reduced.

[0074] like Figures 1 to 4As shown, the cooling unit 41 includes an exhaust baffle 411, which is installed in the second chamber 112. In addition, the exhaust baffle 411 and the first partition 30 are arranged at intervals to form a first flow channel 412 for guiding the flue gas flowing into the second chamber 112. The first flow channel 412 is connected to the first through hole 31, that is, when the battery cell 20 has thermal runaway, the flue gas generated in the battery cell 20 is discharged from the pressure relief mechanism 21 and flows directly into the first flow channel 412 through the first through hole 31. By setting the exhaust baffle 411 and forming the first flow channel 412, the flue gas discharged from the pressure relief mechanism 21 flows along the first flow channel 412, so that the flue gas will not flow randomly and dispersedly in various directions, that is, the flue gas can flow into the second chamber 112 regularly instead of randomly diffusing into the second chamber 112. Furthermore, by providing the exhaust baffle 411 and forming the first flow channel 412, most or even all of the flue gas is directed to the cooling unit 41 for heat exchange, so that the flue gas can be cooled and the possibility of flue gas combustion is reduced.

[0075] In some embodiments, the first baffle 30 and / or the exhaust baffle 411 are configured as a liquid cooling plate, which is used to heat exchange the flue gas flowing into the first flow channel 412 to cool the flue gas. The liquid cooling plate contains a coolant inside, and the coolant is used to heat exchange with the flue gas to cool the flue gas. The coolant can be water, a mixture of water and ethylene glycol, etc., and the coolant can be circulating. When the battery cell 20 has thermal runaway, the flue gas generated in the battery cell 20 is discharged from the pressure relief mechanism 21 into the first flow channel 412. At this time, the flue gas in the first flow channel 412 contacts the liquid cooling plate for heat exchange, and the coolant in the liquid cooling plate takes away at least part of the heat in the flue gas. That is, the flue gas discharged from the pressure relief mechanism 21 and just flowing into the first flow channel 412 can exchange heat with the liquid cooling plate, so that the flue gas can be cooled to a greater extent, further reducing the possibility of flue gas combustion. In this way, the efficiency of flue gas cooling can be further improved.

[0076] In some embodiments, a plurality of second partitions 413 are disposed in the first flow channel 412, such as Figure 8 and Fig. 9 As shown. Two adjacent second partitions 413 are arranged at intervals. A first spacing space 4130 is formed between two adjacent second partitions 413, and the two adjacent first spacing spaces 4130 are connected to form a first flow channel 412. In this way, the distance along which the flue gas flows along the first flow channel 412 is increased, that is, the flue gas flows in the first flow channel 412 for a longer time, which is beneficial to the cooling of the flue gas; in addition, when the first partition 30 and / or the exhaust baffle 411 are set as a liquid cooling plate, the flue gas contacts the liquid cooling plate for a longer time for heat exchange, so that the liquid cooling plate can be used to more fully exchange heat with the flue gas, and the liquid cooling plate can take away more heat to cool the flue gas.

[0077] In some embodiments, each second baffle 413 is a plate made of metal material, and the metal material includes but is not limited to copper, aluminum, steel, etc. Metal material has excellent thermal conductivity, and one end of each second baffle 413 abuts against the first baffle 30, and / or the other end of each second baffle 413 abuts against the exhaust baffle 411. When the first baffle 30 and / or the exhaust baffle 411 are set as a liquid cooling plate, each second baffle 413 can quickly transfer the heat of the flue gas to the liquid cooling plate, so that the coolant in the liquid cooling plate takes away the heat transferred from each second baffle 413. That is, when the flue gas flows in the first flow channel 412, and when the first baffle 30 and / or the exhaust baffle 411 is set as a liquid cooling plate, the flue gas not only contacts the liquid cooling plate, but also contacts each second baffle 413, and the flue gas transfers heat to each second baffle 413, and then each second baffle 413 transfers heat to the liquid cooling plate, and the coolant in the liquid cooling plate takes away the heat transferred from each second baffle 413. In this way, the effect of cooling the flue gas by the liquid cooling plate can be further improved, so that the flue gas can take away as much heat as possible.

[0078] like Figure 8 and Fig. 9 As shown, a plurality of first partition spaces 4130 are connected end to end in sequence. Thus, a first flow channel 412 in the form of a serpentine is formed, which further increases the distance along which the flue gas flows along the first flow channel 412, which is beneficial to the cooling of the flue gas; in addition, when the first partition plate 30 and / or the exhaust baffle plate 411 are set as a liquid cooling plate, the flue gas can fully contact the liquid cooling plate and each second partition plate 413, thereby improving the cooling efficiency.

[0079] In some embodiments, Figure 8As shown, the battery 200 also includes a liquid pump 51, which is used to transport coolant to the liquid cooling plate. A pressure sensor 52 is installed in the first flow channel 412, and the pressure sensor 52 is electrically connected to the liquid pump 51. When the battery cell 20 has thermal runaway, the smoke generated in the battery cell 20 is discharged from the pressure relief mechanism 21 into the first flow channel 412, so that the pressure in the first flow channel 412 increases rapidly, and the pressure sensor 52 will detect the pressure increase in the first flow channel 412, and then the pressure sensor 52 sends a detection signal of the pressure increase in the first flow channel 412 to the liquid pump 51. The liquid pump 51 increases the flow rate and flow rate of the transported coolant according to the detection signal sent by the pressure sensor 52 that detects the pressure increase in the first flow channel 412. When thermal runaway occurs in the battery cell 20, the smoke is instantly discharged from the pressure relief mechanism 21 and flows into the first flow channel 412, causing a large amount of smoke to instantly accumulate in the first flow channel 412. In other words, a large amount of heat instantly accumulates in the first flow channel 412. At this time, by increasing the flow rate and flow velocity of the coolant in the liquid cooling plate, the cooling circulation of the coolant is increased, thereby improving the efficiency of taking away the heat of the smoke flowing into the first flow channel 412, so that the smoke flowing into the first flow channel 412 can be quickly cooled down.

[0080] In some other embodiments of the present application, the battery 200 further includes a liquid pump 51, which is used to pump coolant to the liquid cold plate. A temperature sensor (not shown) is installed in the first flow channel 412, and the temperature sensor is used to detect the temperature in the first flow channel 412. In addition, the temperature sensor is electrically connected to the liquid pump 51, and the liquid pump 51 adjusts the flow rate and flow rate of the coolant according to the temperature in the first flow channel 412 detected by the temperature sensor. When thermal runaway occurs in the battery cell 20, the high-temperature flue gas generated in the battery cell 20 is discharged from the pressure relief mechanism 21 and flows into the first flow channel 412 through the first through hole 31 on the first partition 30, thereby causing the temperature in the first flow channel 412 to rise rapidly. The temperature sensor then detects the temperature rise in the first flow channel 412, and then the temperature sensor sends a detection signal of the temperature rise in the first flow channel 412 to the liquid pump 51. The liquid pump 51 increases the flow rate and flow velocity of the coolant delivered to the liquid cooling plate based on the detection signal sent by the temperature sensor, thereby improving the efficiency of taking away the heat transferred to the liquid cooling plate, so that the high-temperature flue gas in the first flow channel 412 can be quickly cooled down.

[0081] In some other embodiments of the present application, the cooling device further includes a liquid pump 51, which is used to pump coolant to the liquid cooling plate. A pressure sensor and a temperature sensor are installed in the first flow channel 412 at the same time, and both the pressure sensor and the temperature sensor are electrically connected to the liquid pump 51. When the high-temperature flue gas flows into the first flow channel 412, the pressure sensor and the temperature sensor respectively detect the increase in pressure and temperature in the first flow channel 412, and then the pressure sensor and the temperature sensor both send detection signals to the liquid pump 51. Regardless of whether the liquid pump 51 receives a pressure signal or a temperature signal, or whether the liquid pump 51 receives a pressure signal and a temperature at the same time, the liquid pump 51 will increase the flow rate and flow velocity of the coolant delivered to the liquid cooling plate, thereby improving the efficiency of taking away the heat transferred to the liquid cooling plate, so that the high-temperature flue gas in the first flow channel 412 can be quickly cooled down.

[0082] In some embodiments, Figure 3 As shown, the cooling unit 41 further includes a heat absorbing structure 42, which is disposed on the side of the exhaust baffle 411 away from the first partition 30, and is connected to the first flow channel 412. The heat absorbing structure 42 is used to absorb the heat of the flue gas. The flue gas flows to the heat absorbing structure 42 for further cooling, thereby further reducing the possibility of combustion of the flue gas flowing into the second chamber 112.

[0083] In some embodiments, the heat absorption structure 42 includes a first medium 423 and a second medium 424. A storage space 421 is provided on the side of the exhaust baffle 411 away from the first partition 30. The storage space 421 is connected to the first flow channel 412, and the first medium 423 and the second medium 424 are both provided in the storage space 421. When the flue gas flows into the storage space 421 along the first flow channel 412, the first medium 423 and the second medium 424 contact each other and undergo an endothermic reaction to absorb the heat of the flue gas. When the first medium 423 and the second medium 424 contact each other, the two can undergo an endothermic reaction, thereby absorbing the heat of the high-temperature flue gas, so as to quickly cool down the high-temperature flue gas.

[0084] In some embodiments, the heat absorption structure 42 further includes a third partition 422, which is disposed in the accommodation space 421 to separate the accommodation space 421 into a first accommodation chamber 4211 and a second accommodation chamber 4212. The first medium 423 is disposed in the first accommodation chamber 4211, and the second medium 424 is disposed in the second accommodation chamber. The first accommodation chamber 4211 is communicated with the first flow channel 412. When the smoke flows into the first accommodation chamber 4211 along the first flow channel 412, the first accommodation chamber 4211 and the second accommodation chamber 4212 are communicated so that the first medium 423 and the second medium 424 can contact each other, thereby generating an endothermic reaction to absorb the heat of the smoke.

[0085] like Figures 1 to 3 As shown, in some embodiments, the second chamber 112 is located below the first chamber 111, and the directions of up, down, left, right, front, and back are defined when the battery is in normal use.

[0086] In some embodiments, the first medium 423 is ammonium chloride, and the second medium 424 is water. Ammonium chloride is a material that is easily purchased and available on the market, and the price is cheap, and water is directly available tap water, which can reduce the production cost of the battery and form a low-cost advantage.

[0087] In some embodiments, the third partition plate 422 is a plate made of metal material, wherein the third partition plate 422 includes but is not limited to a plate made of metal aluminum material or a plate made of metal copper material.

[0088] In some embodiments, Fig.10 As shown, the third partition plate 422 is provided with a second through hole, and a control valve 4221 is installed in the second through hole. The control valve 4221 is used to open when the smoke flows into the first accommodating chamber 4211, so as to connect the first accommodating chamber 4211 and the second accommodating chamber 4212, so that the second medium 424 enters the first accommodating chamber 4211 and contacts with the first medium 423, and an endothermic reaction occurs to absorb the heat of the smoke. The method of opening the control valve 4221 on the third partition plate 422 to connect the first accommodating chamber 4211 and the second accommodating chamber 4212 is an active opening method. The control valve 4221 includes but is not limited to an electromagnetic control valve, a thermal expansion valve, etc. In this embodiment, the control valve 4221 needs to be assembled and operated in conjunction with the pressure sensor 52, and the control valve 4221 is electrically connected to the pressure sensor 52. When thermal runaway occurs in the battery cell 20, the smoke generated in the battery cell 20 is discharged from the pressure relief mechanism 21 into the first flow channel 412, causing the pressure in the first flow channel 412 to increase rapidly. The pressure sensor 52 detects the pressure increase in the first flow channel 412, and the pressure sensor 52 sends a detection signal of the pressure increase in the first flow channel 412 to the control valve 4221. The control valve 4221 opens according to the detection signal sent by the pressure sensor 52 that detects the pressure increase in the first flow channel 412. The control valve 4221 responds sensitively and quickly, causing the second medium 424 in the second accommodating chamber 4212 to enter the first accommodating chamber 4211 and contact with the first medium 423, causing an endothermic reaction to absorb the heat of the smoke, thereby cooling the smoke.

[0089] In some embodiments, Fig.10As shown, the third partition plate 422 is provided with a second through hole, and a plugging member 4221' made of a hot-melt material is installed in the second through hole. When smoke flows into the first accommodating cavity 4211, the plugging member 4221' is melted by heat to connect the first accommodating cavity 4211 and the second accommodating cavity 4212. The method of providing a plugging member 4221' made of a hot-melt material in the second through hole of the third partition plate 422 and using the high temperature of the smoke to melt the plugging member 4221' to connect the first accommodating cavity 4211 and the second accommodating cavity 4212 is a passive opening method. In this embodiment, when the battery cell 20 has thermal runaway, the smoke generated in the battery cell 20 is discharged from the pressure relief mechanism 21 into the first flow channel 412, and then the high-temperature smoke flows into the first accommodating cavity 4211 and contacts the hot-melt sealing member 4221′. The high-temperature smoke melts the hot-melt sealing member 4221′, so that the second medium 424 in the second accommodating cavity 4212 enters the first accommodating cavity 4211 through the second through hole and contacts the first medium 423. The second medium 424 and the first medium 423 undergo an endothermic reaction to absorb the heat of the smoke, thereby cooling the smoke.

[0090] In some embodiments, the third partition 422 is a plate made of a hot-melt material. When smoke flows into the first accommodation cavity 4211, the third partition 422 is heated and melted to connect the first accommodation cavity 4211 and the second accommodation cavity 4212. The third partition 422 is made of a hot-melt material and uses the high temperature of the smoke to melt through the third partition 422 to connect the first accommodation cavity 4211 and the second accommodation cavity 4212, which is a passive opening method. In this embodiment, when the battery cell 20 has thermal runaway, the smoke generated in the battery cell 20 is discharged from the pressure relief mechanism 21 into the first flow channel 412, and then the high-temperature smoke flows into the first accommodating chamber 4211 and contacts the third partition 422. The high-temperature smoke causes the third partition 422 made of hot-melt material to be at least partially melted. The second medium 424 in the second accommodating chamber 4212 enters the first accommodating chamber 4211 through the melted position and contacts the first medium 423. The second medium 424 and the first medium 423 undergo an endothermic reaction to absorb the heat of the smoke, thereby cooling the smoke.

[0091] like Figures 4 to 7 As shown, in some embodiments, the first accommodating chamber 4211 is located below the second accommodating chamber 4212, and the bottom wall of the first accommodating chamber 4211 is provided with a first inlet 4213, and the first accommodating chamber 4211 is connected to the first flow channel 412 through the first inlet 4213. High-temperature flue gas first flows from the first flow channel 412 to the bottom of the bottom wall of the first accommodating chamber 4211, and then the flue gas flows from bottom to top into the first accommodating chamber 4211 through the first inlet 4213. The first inlet 4213 can facilitate the flue gas to smoothly enter the first accommodating chamber 4211.

[0092] In some embodiments, the number of first inlets 4213 is multiple, and the multiple first inlets 4213 are arranged in an array. Optionally, the multiple first inlets 4213 are arranged in a rectangular array. Such a design can be more conducive to the smooth entry of smoke into the first accommodating chamber 4211. Optionally, along the direction of smoke flow, the density per unit area of ​​the first inlets 4213 distributed on the bottom wall of the first accommodating chamber 4211 is getting smaller and smaller. In this way, when the smoke flows to the bottom of the bottom wall of the first accommodating chamber 4211, a part of the smoke immediately flows into the first accommodating chamber 4211 from the first inlet 4213, and a part of the smoke will continue to flow along the bottom wall of the first accommodating chamber 4211, and this part of the smoke will also flow into the first accommodating chamber 4211 from other first inlets 4213. In other words, when the smoke flows from the first flow channel 412 to the bottom of the bottom wall of the first accommodating chamber 4211, along the flow direction of the smoke, the first inlets 4213 are arranged to be gradually sparsely distributed along the direction of the smoke flow. Thus, during the flow of smoke, smoke gradually flows from the first inlet 4213 into the first accommodating chamber 4211. Along the direction of smoke flow, the number of first inlets 4213 on the bottom wall of the first accommodating chamber 4211 is smaller, and such a design can more reasonably distribute the first inlets 4213.

[0093] In some embodiments, Figure 7 As shown, a second inlet 4214 is provided on the side wall of the first accommodating chamber 4211, and the first accommodating chamber 4211 and the first flow channel 412 are connected through the second inlet 4214. That is, the smoke flows along the first flow channel 412, and the smoke can flow into the first accommodating chamber 4211 from the second inlet 4214. The second inlet 4214 can facilitate the smoke to enter the first accommodating chamber 4211 smoothly.

[0094] In some embodiments, a plurality of cooling units 41 are provided, and the plurality of cooling units 41 are connected in sequence. That is, along the direction of flue gas flow, the plurality of cooling units 41 are connected in sequence. The plurality of cooling units 41 may be the same or different. The plurality of cooling units 41 are used to cool down the high-temperature flue gas, further reducing the possibility of combustion of the cooled flue gas.

[0095] When there are multiple cooling units 41, two adjacent cooling units 41 are spaced apart, and a flow outlet 4215 is provided on the side wall of the first accommodating chamber 4211 of the previous cooling unit 41 opposite to the second inlet 4214, and the first inlet 4213 and the second inlet 4214 of the next cooling unit 41 are connected to the flow outlet 4215. In addition, in any cooling unit 41, after the second medium 424 in the second accommodating chamber 4212 enters the first accommodating chamber 4211, the height of the second medium 424 is lower than the height of the flow outlet 4215.

[0096] In some embodiments, the flue gas treatment device 40 includes a separation unit 43, which is used to separate solid particles and / or liquids in the flue gas flowing into the second chamber 112. When the battery cell 20 is in thermal runaway, high-temperature flue gas is generated in the battery cell 20, and the generated flue gas contains solid particles and / or liquids such as Ni, Co, and Mn. When the flue gas is discharged from the pressure relief mechanism 21 and flows into the second chamber 112 through the first through hole 31, the temperature and pressure in the second chamber 112 rise sharply, and the concentration of solid particles and / or liquids in the flue gas increases. At this time, if the cavity wall of the second chamber 112 is broken under the action of the flue gas pressure, or the high-temperature flue gas is directly discharged to the outside of the battery 200, the flue gas with increased concentration of solid particles and / or liquids will combine with oxygen in the air, and under the high temperature condition of the flue gas, it may cause combustion. Therefore, a separation unit 43 is designed in the smoke treatment device 40. When the smoke flows into the second chamber 112, the separation unit 43 will separate and filter the solid particles and / or liquid in the smoke, thereby reducing the concentration of the solid particles and / or liquid in the smoke. In this way, when the smoke from which the solid particles and / or liquid are separated and filtered is discharged to the outside of the battery 200, no black smoke will appear. Even if the shell 10 is ruptured due to the sharply increased pressure, causing the smoke to contact the air, the concentration of the solid particles and / or liquid in the smoke has been reduced, and the smoke discharged to the outside of the battery 200 is almost transparent and has a light irritating odor (or even no odor), which not only protects the environment, but also does not cause discomfort to the senses of users or other personnel.

[0097] In some embodiments, Figure 1 , Figures 4 to 6 As shown, the separation unit 43 includes an adsorption filter structure 431, which is used to adsorb and filter solid particles and / or liquids in the flue gas. The adsorption filter structure 431 is installed in the second chamber 112. When the battery cell 20 has thermal runaway, the flue gas discharged from the battery cell 20 flows into the second chamber 112 through the first through hole 31, and the adsorption filter structure 431 adsorbs and separates the solid particles and / or liquids in the flue gas, thereby reducing the concentration of solid particles and / or liquids in the flue gas. The adsorption filter structure 431 includes but is not limited to activated carbon filter cotton, honeycomb activated carbon filter, coconut shell activated carbon filter, honeycomb ceramic filter material, etc., but the adsorption filter structure 431 is required to be able to withstand high temperatures.

[0098] In some embodiments, Figure 1 , Figure 5 and Figure 8As shown, the separation unit 43 further includes a plurality of fourth partitions 432, two adjacent fourth partitions 432 are arranged at intervals, and the second interval spaces 4320 formed between the two adjacent fourth partitions 432 are interconnected to form a second flow channel 433, and the adsorption and filtration structure 431 is arranged in the second flow channel 433. The second flow channel 433 formed by the plurality of fourth partitions 432 increases the distance along which the smoke flows through the adsorption and filtration structure 431, thereby further adsorbing and filtering the solid particles and / or liquid in the smoke, so that the concentration of the solid particles and / or liquid in the smoke is lower.

[0099] In some embodiments, Figure 5 As shown, the plurality of second compartments 4320 are connected end to end in sequence. Thus, a second flow channel 433 in the form of a serpentine is formed, further increasing the distance along which the smoke flows along the second flow channel 433. In this way, the adsorption and filtration structure 431 more fully adsorbs and filters the solid particles and / or liquid in the smoke, thereby improving the adsorption and filtration efficiency of the solid particles and / or liquid in the smoke.

[0100] In some embodiments, a plurality of separation units 43 are provided, and the plurality of separation units 43 are connected in sequence. That is, along the direction of smoke flow, the plurality of separation units 43 are connected in sequence. The adsorption and filtration structures 431 used in each separation unit 43 may be the same or different. Taking two separation units 43 connected as an example, the first separation unit 43 includes but is not limited to the use of activated carbon filter cotton, and the second separation unit 43 includes but is not limited to the use of coconut shell activated carbon filter. Optionally, the structures of the plurality of separation units 43 may be the same or different. This further improves the adsorption and filtration efficiency of solid particles and / or liquids in the smoke.

[0101] In some embodiments, Fig.10 As shown, the separation unit 43 is configured as a separation device 60 independent of the housing 10, and the separation device 60 includes one of a cyclone separation device, a gravity separation device, an inertial force separation device, a wet foam separation device, and an electrostatic separation device, or several of them connected in sequence. In this embodiment, the cyclone separation device, the gravity separation device, the inertial force separation device, the wet foam separation device, and the electrostatic separation device are devices independent of the housing 10, respectively, and are connected to the second chamber 112 through a pipeline, so that the smoke flowing into the second chamber 112 is guided into the separation device to separate and filter the solid particles and / or liquid in the smoke.

[0102] A cyclone separator is a device used for separation of gas-solid systems or liquid-solid systems. The working principle is that the solid particles or liquid droplets with large inertial centrifugal force are thrown to the outer wall to separate by the rotational motion caused by the tangential introduction of airflow. The main features of the cyclone separator are simple structure, high operational flexibility, high efficiency, and convenient management and maintenance. It is a widely used separation equipment in industry.

[0103] Gravity separation equipment mainly uses the density difference between the medium and the separated material (i.e. the gravity difference in the gravitational field) to achieve its separation function, so it is also called a gravity separator.

[0104] Inertial force separation equipment, also known as momentum separator, uses the inertia of particles or droplets entrained in the airflow to achieve separation. An obstacle is set on the path of gas flow. When the airflow bypasses the obstacle, it suddenly turns, and the particles or droplets hit the obstacle and are collected. The smaller the radius of curvature of the airflow turn, the higher its efficiency. The principle of inertial separator is similar to that of cyclone separator. The separator can also be filled with loose fibrous materials instead of rigid baffles. In this case, sedimentation, inertia and filtration all produce a certain separation effect. If the filler is wetted with a viscous liquid, the separation efficiency can be further improved.

[0105] Wet foam separation equipment, based on the principle of adsorption, bubbles are blown into liquid containing surfactants, so that the surfactants in the liquid gather on the gas-liquid interface (the surface of the bubbles), forming a foam layer above the main body of the liquid. By separating the foam layer from the main body of the liquid phase, the purpose of concentrating the surfactants (in the foam layer) and purifying the main body of the liquid phase can be achieved. The substances to be concentrated can be surfactants or substances that can be complexed with surfactants, but they must have the ability to complex or chelate with a certain type of surfactant. People usually refer to all methods that use gas to bubble in a solution to achieve separation or concentration as foam adsorption separation technology, or foam separation technology for short. Therefore, wet foam separation equipment is also called foam adsorption separator.

[0106] Electrostatic separator, also known as electrostatic separation equipment, uses high-voltage static electricity to separate conductive materials from non-conductive materials. It has high separation efficiency and the separation effect can reach up to 99%.

[0107] In some embodiments, the battery may include only a cooling unit 41. When the smoke is discharged from the pressure relief mechanism 21 and flows into the second chamber 112 through the first through hole 31, the cooling unit 41 cools the smoke, thereby reducing the possibility of smoke combustion. Alternatively, in other embodiments, the battery may include only a separation unit 43. When the smoke is discharged from the pressure relief mechanism 21 and flows into the second chamber 112 through the first through hole 31, the separation unit 43 separates and filters the solid particles and / or liquid in the smoke, thereby reducing the concentration of the solid particles and / or liquid in the smoke.

[0108] In some embodiments, Figure 2 As shown, the flue gas treatment device 40 includes both a cooling unit 41 and a separation unit 43. The separation unit 43 is located downstream of the cooling unit 41 along the flue gas flow direction, and the separation unit 43 is connected to the cooling unit 41. That is, the inlet of the second flow channel 433 of the separation unit 43 is connected to the flow outlet 4215 of the cooling unit 41, so that the separation unit 43 is connected to the cooling unit 41. In the embodiment of the present application, when the battery cell 20 has thermal runaway, high-temperature flue gas is generated in the battery cell 20, and the generated flue gas contains solid particles and / or liquids such as Ni, Co, and Mn. When the flue gas is discharged from the pressure relief mechanism 21 and flows into the second chamber 112 through the first through hole 31, the cooling unit 41 first cools the flue gas, and the flue gas after cooling flows into the separation unit 43 to be adsorbed and filtered, thereby reducing the concentration of solid particles and / or liquids in the flue gas.

[0109] In the embodiments of the present application, Figure 1 , Figure 2 , Figure 5 and Figure 8 As shown, the housing 10 is provided with an exhaust hole, which is used to discharge the smoke treated by the smoke treatment device to the outside of the battery 200. Optionally, the exhaust hole is equipped with a battery explosion-proof valve 12, which is used to discharge the treated smoke to the outside of the battery 200, that is, the flow outlet 4215 of the cooling unit 41 and / or the outlet of the second flow channel 433 of the separation unit 43 are connected to the battery explosion-proof valve 12. When the battery cell 20 has thermal runaway, the smoke generated by the battery cell 20 is cooled by the cooling unit 41 and / or separated and filtered by the separation unit 43, so that the smoke is processed into low-temperature and low-pollution gas, and then discharged from the battery explosion-proof valve 12 to the outside of the battery 200. In this way, when the smoke treated by the smoke treatment device 40 is discharged to the outside of the battery 200, it not only reduces the possibility of smoke combustion, protects the life and property safety of users or other personnel, but also reduces the pollution hazard of smoke and protects the environment.

[0110] When the separation unit 43 is configured as one of a cyclone separation device, a gravity separation device, an inertial force separation device, a wet foam separation device, and an electrostatic separation device, or several of them connected in sequence, the separation device is connected to the battery explosion-proof valve 12 through a pipeline, such as Fig.10 As shown, the flue gas is input from the second chamber 112 through the battery explosion-proof valve 12 and the pipeline into the separation device, and the separation device separates and filters the solid particles and / or liquid in the flue gas. Then, the separation device discharges the flue gas separated and filtered of the solid particles and / or liquid to the outside of the battery 200.

[0111] According to another aspect of the embodiment of the present application, there is provided an electric device 100, such as Fig.11 As shown. In the embodiment of the present application, the power-consuming device 100 includes the battery 200 provided above, and the battery 200 provides power for the normal operation of the power-consuming device 100. Among them, the power-consuming device 100 includes but is not limited to a new energy electric vehicle. Alternatively, the power-consuming device 100 can also be a larger energy storage device, which uses the battery 200 provided above to store electric energy.

[0112] In the embodiment of the present application, the battery includes a housing 10, a plurality of battery cells 20, a first separator 30, an exhaust baffle 411, a plurality of second separators 413, a first medium 423, a second medium 424, an adsorption filter structure 431, and a plurality of fourth separators 432. The inner cavity 11 of the housing 10 is divided into a first chamber 111 and a second chamber 112 by the first separator 30, a plurality of battery cells 20 are installed in the first chamber 111, and the exhaust baffle 411, the second separator 413, the first medium 423, the second medium 424, the adsorption filter structure 431, and the fourth separator 432 are all installed in the second chamber 112. The plurality of second separators 413 are installed between the first separator 30 and the exhaust baffle 411, and form a serpentine first flow channel 412. In addition, a storage space 421 is provided on the side of the exhaust baffle 411 away from the first partition 30, and the storage space 421 is connected to the first flow channel 412. The storage space 421 is divided into a first storage chamber 4211 and a second storage chamber 4212 distributed vertically by a third partition 422 (the first storage chamber 4211 is located below the second storage chamber 4212), and a first medium 423 is provided in the first storage chamber 4211, and the first medium 423 is ammonium chloride, and a second medium 424 is provided in the second storage chamber 4212, and the second medium 424 is water, wherein the third partition 422 is made of hot-melt material. A plurality of fourth baffles 432 are arranged at intervals to form a serpentine second flow channel 433, and the second flow channel 433 is connected to the first storage chamber 4211, and an adsorption filter structure 431 is provided in the second flow channel 433. In this way, when a battery cell 20 experiences thermal runaway, the smoke generated in the battery cell 20 is discharged and flows into the first flow channel 412, and then the smoke flows into the first accommodating chamber 4211. At this time, the third partition 422 is heated and melted, so that the first medium 423 and the second medium 424 contact each other, and an endothermic reaction occurs to absorb the heat of the smoke. Then, the cooled smoke flows into the second flow channel 433. During the flow process, the solid particles and / or liquid in the smoke are adsorbed and filtered by the adsorption and filtration structure 431, so that the smoke output to the outside of the battery 200 has a low temperature and less pollution.

[0113] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A battery, characterized in that: include: a housing, forming an inner cavity; A battery cell is installed in the inner cavity, and the battery cell is provided with a pressure relief mechanism; a first partition, installed in the housing to separate the inner cavity into a first chamber and a second chamber, the battery cell is installed in the first chamber, the first partition is provided with a first through hole, the first chamber and the second chamber are connected through the first through hole, the pressure relief mechanism is arranged opposite to the first through hole so that the smoke discharged from the battery cell through the pressure relief mechanism flows into the second chamber; A flue gas treatment device is installed in the second chamber, and is used for treating the flue gas flowing into the second chamber and then discharging it to the outside of the battery.

2. The battery according to claim 1, characterized in that: The flue gas treatment device comprises a cooling unit, and the cooling unit is used to cool the flue gas flowing into the second chamber.

3. The battery according to claim 2, characterized in that: The cooling unit includes an exhaust baffle installed in the second chamber. The exhaust baffle and the first partition are spaced apart to form a first flow channel for guiding the smoke flowing into the second chamber. The first flow channel is connected to the first through hole.

4. The battery according to claim 3, characterized in that: The first partition plate and / or the exhaust baffle are configured as liquid cooling plates, and the liquid cooling plates are used to perform heat exchange on the flue gas flowing into the first flow channel to cool the flue gas.

5. The battery according to claim 3, characterized in that: A plurality of second baffles are provided in the first flow channel, and two adjacent second baffles are arranged at intervals; One end of each of the second baffles abuts against the first baffle, and / or the other end of each of the second baffles abuts against the exhaust baffle; The first spacing spaces formed between two adjacent second partitions are connected to form the first flow channel.

6. The battery according to claim 5, characterized in that: The plurality of first interval spaces are connected end to end in sequence.

7. The battery according to claim 4, characterized in that: The battery further includes a liquid pump, which is used to transport cooling liquid to the liquid cooling plate. A pressure sensor and / or a temperature sensor is installed in the first flow channel, and the pressure sensor and / or the temperature sensor is electrically connected to the liquid pump.

8. The battery according to claim 3, characterized in that: The cooling unit further comprises a heat absorbing structure, which is arranged on a side of the exhaust baffle away from the first partition plate, and is connected to the first flow channel, and is used to absorb heat from the flue gas.

9. The battery according to claim 8, characterized in that: The heat absorption structure includes a first medium and a second medium. A storage space is provided on a side of the exhaust baffle away from the first partition, and the storage space is communicated with the first flow channel. The first medium and the second medium are both arranged in the storage space. When the flue gas flows into the storage space, the first medium and the second medium contact each other and undergo an endothermic reaction to absorb the heat of the flue gas.

10. The battery according to claim 9, characterized in that: The heat absorption structure also includes a third partition, which is arranged in the accommodating space to separate the accommodating space into a first accommodating chamber and a second accommodating chamber. The first medium is arranged in the first accommodating chamber, and the second medium is arranged in the second accommodating chamber. The first accommodating chamber is communicated with the first flow channel. When smoke flows into the first accommodating chamber, the first accommodating chamber and the second accommodating chamber are communicated so that the first medium and the second medium contact each other and undergo an endothermic reaction to absorb the heat of the smoke.

11. The battery according to claim 10, characterized in that: The first accommodating chamber is located below the second accommodating chamber. The bottom wall of the first accommodating chamber is provided with a first inlet. The first accommodating chamber is communicated with the first flow channel through the first inlet.

12. The battery according to claim 11, characterized in that: There are multiple first inlets, and the multiple first inlets are arranged in an array.

13. The battery according to claim 10, characterized in that: A second inlet is disposed on the side wall of the first accommodating chamber, and the first accommodating chamber is communicated with the first flow channel through the second inlet.

14. The battery according to claim 9, characterized in that: The first medium is ammonium chloride, and the second medium is water.

15. The battery according to claim 10, characterized in that: The third partition plate is provided with a second through hole, and the second through hole is installed with a control valve, and the control valve is used to open when smoke flows into the first accommodating chamber to connect the first accommodating chamber with the second accommodating chamber; Alternatively, a second through hole is provided on the third partition plate, and a plugging piece made of a hot-melt material is installed on the second through hole. When smoke flows into the first accommodating cavity, the plugging piece is melted by heat to connect the first accommodating cavity with the second accommodating cavity; Alternatively, the third partition is a plate made of hot-melt material. When smoke flows into the first accommodating chamber, the third partition is melted by heat to connect the first accommodating chamber and the second accommodating chamber.

16. The battery according to any one of claims 2 to 15, characterized in that: There are multiple cooling units, and the multiple cooling units are connected in sequence.

17. The battery according to any one of claims 1 to 15, characterized in that: The flue gas treatment device comprises a separation unit, which is used to separate solid particles and / or liquid from the flue gas flowing into the second chamber.

18. The battery according to any one of claims 2 to 15, characterized in that: The flue gas treatment device includes a separation unit, which is used to separate solid particles and / or liquid in the flue gas flowing into the second chamber. The separation unit is connected to the cooling unit and is located downstream of the cooling unit along the flue gas flow direction.

19. The battery according to claim 18, characterized in that: The separation unit comprises an adsorption and filtration structure, and the adsorption and filtration structure is used for adsorbing and filtering solid particles and / or liquid in the smoke.

20. The battery according to claim 19, characterized in that: The adsorption and filtration structure includes at least one of activated carbon filter cotton, activated carbon filter screen, and honeycomb ceramic filter material.

21. The battery according to claim 19, characterized in that: The separation unit also includes a plurality of fourth partitions, which are installed in the second chamber, two adjacent fourth partitions are spaced apart, and the second spacing spaces formed between two adjacent fourth partitions are interconnected to form a second flow channel, and the adsorption filtration structure is arranged in the second flow channel.

22. The battery according to claim 21, characterized in that: A plurality of the second compartments are connected end to end in sequence.

23. The battery according to claim 18, characterized in that: There are multiple separation units, and the multiple separation units are connected in sequence.

24. The battery according to any one of claims 1 to 15, characterized in that: The shell is provided with an exhaust hole, and the exhaust hole is used to discharge the flue gas treated by the flue gas treatment device to the outside of the battery.

25. An electrical device, characterized in that: Comprising a battery as described in any one of claims 1-24.

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