Batteries and power-consuming devices

Abstract

This application discloses a battery (200) and a power consumption device (100), which belong to the field of battery device technology. The battery (200) includes a case (10) having an internal cavity (11), a battery cell (20) mounted in the internal cavity (11) and provided with a pressure relief mechanism (21), and a first partition plate (30) mounted in the case (10) to divide the internal cavity (11) into a first cavity (111) and a second cavity (112). The battery cell (20) is mounted in the first cavity (111), the first partition plate (30) has a first through-hole (31), and the first The cavity 111 and the second cavity 112 are connected via a first through-hole 31, and a pressure relief mechanism 21 is installed opposite the first through-hole 31 to allow flue gas discharged from the battery cell 20 through the pressure relief mechanism 21 to flow into the second cavity 112. The battery also includes a flue gas treatment device 40 attached to the second cavity 112 for treating the flue gas that has flowed into the second cavity 112 and then discharging it outside the battery 200. The purpose of applying the technical solution of this application is to solve the problem of environmental pollution and serious harm to human health caused by flue gas generated when a battery experiences thermal runaway.

Description

[Technical Field]

[0001] [CROSS-REFERENCE TO RELATED APPLICATIONS] This application claims priority to a Chinese patent application filed with the China Patent Office on July 11, 2023, bearing application number 202310843634.2 and entitled "Battery and Power Consumption Device," the entire contents of which are incorporated herein by reference.

[0002] This application relates to the field of battery devices, and more particularly to batteries and power consuming devices. [Background technology]

[0003] New energy batteries may experience thermal runaway during use. When a new energy battery experiences thermal runaway, its battery cells will emit high-temperature flue gas. After the high-temperature flue gas is emitted, it initially resides within the battery case. However, once the high-temperature flue gas leaks or is discharged from the battery case to the outside, it combines with air, and the solid particulate matter and / or liquid concentration of the flue gas reaches a certain level. Due to the high temperature, black smoke and / or white mist are likely to be generated. Furthermore, flue gas contains toxic substances, making it a relatively serious pollution hazard. Once flue gas leaks or is discharged to the outside, it not only pollutes the environment but also harms human health. Summary of the Invention

[0004] The objectives of the embodiments of the present application are as follows: to provide a battery and a power-consuming device, and to solve the problems of environmental pollution and serious harm to human health caused by exhaust gases generated when a battery experiences thermal runaway, including but not limited to these.

[0005] The technical solutions adopted in the embodiments of this application are as follows:

[0006] According to a first aspect, there is provided a battery, a case having an internal cavity formed therein; a battery cell mounted within the internal cavity and provided with a pressure relief mechanism; a first partition plate attached to the case to divide the internal cavity into a first cavity and a second cavity, a battery cell attached to the first cavity, a first through-hole formed in the first partition plate, the first cavity and the second cavity communicating via the first through-hole, a pressure relief mechanism installed opposite the first through-hole, and flue gas discharged from the battery cell through the pressure relief mechanism flowing into the second cavity; and a flue gas treatment device attached to the second cavity for treating the flue gas that has flowed into the second cavity and then discharging it to the outside of the battery.

[0007] After the treatment of the flue gas is completed, the harmfulness of the flue gas is reduced, and then the flue gas is discharged to the outside of the battery, thereby reducing and even avoiding the harm caused by the flue gas to the life and health of the user and other people, and protecting the safety of the life and health of the user and other people.

[0008] In some embodiments, the flue gas treatment device includes a cooling unit for cooling the flue gas flowing into the second cavity, the cooling unit performing heat exchange with the flue gas as it flows into the second cavity, thereby reducing the temperature of the flue gas.

[0009] In some embodiments, the cooling unit includes an exhaust baffle, the exhaust baffle is mounted in the second cavity, and the exhaust baffle and the first partition plate are spaced apart to form a first flow path for guiding the flue gas that has flowed into the second cavity, the first flow path communicating with the first through-hole. By providing the exhaust baffle and forming the flow path, most or even all of the flue gas that has flowed into the second cavity can be guided to the cooling unit for heat exchange, thereby cooling the flue gas and reducing the possibility of combustion of the flue gas.

[0010] In some embodiments, the first partition plate and / or the exhaust baffle is configured as a liquid cooling plate, which is used to perform heat exchange with the flue gas flowing into the first flow path to cool the flue gas, and the flue gas flowing into the first flow path can exchange heat with the liquid cooling plate, thereby achieving a greater degree of cooling and temperature reduction of the flue gas, further reducing the possibility of the flue gas burning.

[0011] In some embodiments, a plurality of second partition plates are provided in the first flow path, and two adjacent second partition plates are spaced apart, with one end of each second partition plate abutting the first partition plate and / or the other end of each second partition plate abutting the exhaust baffle, and the first spaces formed between the two adjacent second partition plates communicate to form a first flow path. The first flow path formed by the second partition plates increases the path length of the flue gas, i.e., the flue gas flows for a longer time in the flow path, which is beneficial to cooling and lowering the temperature of the flue gas. Furthermore, if the first partition plates and / or the exhaust baffle are installed as liquid cooling plates, the flue gas will have a longer time to come into contact with the liquid cooling plate and exchange heat, thereby enabling the liquid cooling plate to more effectively exchange heat with the flue gas, and the liquid cooling plate can absorb more heat to cool and lower the temperature of the flue gas.

[0012] In some embodiments, the plurality of first spaces are connected in series, which further increases the path distance of the flue gas flowing through the first flow path, which is beneficial to cooling and lowering the temperature of the flue gas. In addition, when the first partition plate and / or the exhaust baffle are installed as liquid cooling plates, the flue gas can be in sufficient contact with the liquid cooling plate, which improves the efficiency of cooling and lowering the temperature.

[0013] In some embodiments, the second partition plate is a plate member made of a metal material, including but not limited to copper, aluminum, steel, etc. In this way, the effect of cooling and lowering the temperature of the flue gas can be further improved, and the flue gas can absorb as much heat as possible.

[0014] In some embodiments, the battery further includes a liquid pump for transporting the coolant to the liquid cooling plate, and a pressure sensor and / or a temperature sensor are mounted in the first flow path, and the pressure sensor and / or the temperature sensor are electrically connected to the liquid pump. The liquid pump adjusts the flow rate and flow speed of the coolant based on the pressure sensor detecting an increase in pressure in the first flow path, for example, by increasing the flow rate and flow speed of the coolant. And / or the liquid pump adjusts the flow rate and flow speed of the coolant based on the temperature sensor detecting an increase in temperature in the first flow path, for example, by increasing the flow rate and flow speed of the coolant. Increasing the flow rate and flow speed of the coolant in the liquid cooling plate increases the cooling cycle of the coolant, thereby improving the efficiency of heat removal from the flue gas flowing into the flow path, and thereby allowing the flue gas flowing into the flow path to be cooled and cooled more quickly.

[0015] In some embodiments, the cooling unit further includes a heat absorption structure, the heat absorption structure is disposed on one side of the exhaust baffle away from the first partition plate, the heat absorption structure is in communication with the first flow passage, and the heat absorption structure is used to absorb heat from the flue gas, which flows into the heat absorption structure to further cool and reduce the temperature, thereby further reducing the possibility of combustion of the flue gas flowing into the second cavity.

[0016] In some embodiments, the heat-absorbing structure includes a first medium and a second medium, and a storage space is provided on one side of the exhaust baffle away from the first partition plate, the storage space is connected to the first flow path, and the first medium and the second medium are both installed in the storage space, and when the flue gas flows into the storage space, the first medium and the second medium contact each other to generate an endothermic reaction to absorb the heat of the flue gas. When the first medium and the second medium contact each other, they can generate an endothermic reaction, thereby absorbing the heat of the high-temperature flue gas and quickly cooling the high-temperature flue gas.

[0017] In some embodiments, the heat-absorbing structure further includes a third partition plate disposed within the storage space to divide the storage space into a first storage cavity and a second storage cavity, the first medium is disposed in the first storage cavity, and the second medium is disposed in the second storage cavity, the first storage cavity is in communication with the first flow path, and when the flue gas flows into the first storage cavity, the first storage cavity is in communication with the second storage cavity to bring the first medium and the second medium into contact with each other and generate an endothermic reaction to absorb the heat of the flue gas. When the flue gas flows into the first storage cavity along the first flow path, the first storage cavity and the second storage cavity can be in communication with each other by removing the partitioning effect of the third partition plate, and the first medium and the second medium can be in contact with each other and generate an endothermic reaction to absorb the heat of the flue gas.

[0018] In some embodiments, the first cavity is located below the second cavity, and a first inlet is provided on a bottom wall of the first cavity, and the first cavity communicates with the first flow path through the first inlet. The first inlet can facilitate smooth entry of the flue gas into the first cavity.

[0019] In some embodiments, the number of first inlets is plural, and the plural first inlets are arranged in an array, which is advantageous for allowing the flue gas to smoothly enter the first accommodating cavity.

[0020] In some embodiments, a second inlet is provided on a sidewall of the first storage cavity, and the first storage cavity communicates with the first flow path through the second inlet. The second inlet can facilitate smooth entry of the flue gas into the first storage cavity.

[0021] In some embodiments, the first medium is ammonium chloride and the second medium is water, where ammonium chloride is a material that is easily available on the market and has a low price, and water can be directly obtained, thereby reducing the production cost of the battery and creating a low-cost advantage.

[0022] In some embodiments, the third partition plate has a second through-hole, and a control valve is installed in the second through-hole, and the control valve is opened when the flue gas flows into the first accommodating cavity to connect the first accommodating cavity and the second accommodating cavity. In the third partition plate, the control valve opens to connect the first accommodating cavity and the second accommodating cavity, and the control valve adopts an active opening mode, and the response of the control valve is fast and sensitive, and the second medium in the second accommodating cavity flows into the first accommodating cavity to contact the first medium, causing an endothermic reaction to absorb the heat of the flue gas, thereby cooling the flue gas.

[0023] In some embodiments, the third partition plate has a second through-hole, and a blocking member made of a heat-fusible material is attached to the second through-hole, so that when the flue gas flows into the first accommodating cavity, the blocking member melts due to heat and connects the first accommodating cavity with the second accommodating cavity. The high-temperature flue gas melts the blocking member made of the heat-fusible material, causing the second medium in the second accommodating cavity to flow into the first accommodating cavity through the second through-hole and contact with the first medium, causing an endothermic reaction between the second medium and the first medium to absorb the heat of the flue gas, thereby cooling the flue gas.

[0024] In some embodiments, the third partition plate is a plate member made of a heat-fusible material, and when flue gas flows into the first accommodating cavity, the third partition plate is heated to melt and connect the first accommodating cavity with the second accommodating cavity. The third partition plate made of a heat-fusible material can melt through when contacted with the high-temperature flue gas, allowing the second medium in the second accommodating cavity to flow into the first accommodating cavity and contact the first medium, causing an endothermic reaction to absorb the heat of the flue gas, thereby cooling the flue gas.

[0025] In some embodiments, a plurality of cooling units are provided, the cooling units being in series communication with one another, and the plurality of cooling units are used to cool the hot flue gas to a lower temperature, further reducing the likelihood of the flue gas burning.

[0026] In some embodiments, the flue gas treatment device includes a separation unit for separating solid particulate matter and / or liquid in the flue gas flowing into the second cavity. The flue gas treatment device is designed with the separation unit, which separates and filters the solid particulate matter and / or liquid in the flue gas when the flue gas flows into the second cavity, thereby reducing the concentration of the solid particulate matter and / or liquid in the flue gas.

[0027] In some embodiments, the flue gas treatment device includes a separation unit for separating solid particulate matter and / or liquid in the flue gas flowing into the second cavity, the separation unit being in communication with the cooling unit and located downstream of the cooling unit along the flow direction of the flue gas. When the flue gas is discharged from the pressure release mechanism and flows into the second cavity through the first through-hole, the cooling unit first cools and lowers the temperature of the flue gas, and the cooled and lowered flue gas flows into the separation unit for separation and filtering, thereby reducing the concentration of solid particulate matter and / or liquid in the flue gas.

[0028] In some embodiments, the separation unit includes an adsorptive filtering structure that is used to adsorb and filter solid particulate matter and / or liquid in the flue gas, thereby reducing the concentration of solid particulate matter and / or liquid in the flue gas.

[0029] In some embodiments, the adsorptive filtering structure comprises at least one of activated carbon filter cotton, activated carbon filter mesh, and honeycomb ceramic filtering material.

[0030] In some embodiments, the separation unit further includes a plurality of fourth partition plates, the plurality of fourth partition plates are mounted in the second cavity, two adjacent fourth partition plates are spaced apart, second spaces formed between the two adjacent fourth partition plates communicate with each other to form a second flow path, and the adsorptive filtering structure is disposed in the second flow path. The second flow path formed by the plurality of fourth partition plates increases the path distance of the flue gas through the adsorptive filtering structure, thereby further adsorbing and filtering the solid particulate matter and / or liquid in the flue gas and reducing the concentration of the solid particulate matter and / or liquid in the flue gas.

[0031] In some embodiments, the plurality of second spaces are connected in series, which allows the path length of the second flow path to be further increased, and the adsorptive filtering structure can more fully adsorb and filter the solid particulate matter and / or liquid in the flue gas, thereby improving the adsorptive filtering efficiency for the solid particulate matter and / or liquid in the flue gas.

[0032] In some embodiments, a plurality of separation units are provided, and the plurality of separation units are connected in series, thereby further improving the adsorptive filtering efficiency for solid particulate matter and / or liquid in the flue gas.

[0033] In some embodiments, an exhaust hole is provided in the case, and the exhaust hole is used to discharge the flue gas treated by the flue gas treatment device to the outside of the battery.

[0034] According to a second aspect, there is provided a power consuming device, the power consuming device including a battery as described above. [Brief explanation of the drawings]

[0035] In order to more clearly explain the technical solutions in the embodiments of the present application, the following briefly introduces the drawings that need to be used in the embodiments or exemplary technical description. It is obvious that the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings based on these drawings without exerting any creative efforts. [Figure 1] 1 is an exploded schematic view of a battery according to some embodiments of the present application. [Figure 2] FIG. 2 is a cross-sectional schematic view of the battery shown in FIG. [Figure 3] FIG. 3 is a partial cross-sectional schematic view of the battery shown in FIG. 2. [Figure 4] FIG. 4 is an enlarged schematic view of a portion B in FIG. [Figure 5] FIG. 3 is a schematic cross-sectional view taken along the line AA in FIG. 2. [Figure 6] FIG. 6 is an enlarged schematic view of a portion C in FIG. 5. [Figure 7] FIG. 6 is an enlarged schematic view of a portion D in FIG. 5. [Figure 8] 1 is an exploded schematic view of a battery according to some embodiments of the present application. [Figure 9] FIG. 9 is a schematic assembly diagram of the exhaust baffle and each second partition plate in the battery shown in FIG. 8. [Figure 10] 1 is an exploded schematic view of a battery according to some embodiments of the present application. [Figure 11] 1 is a structural schematic diagram of a power consumption device according to an embodiment of the present application; DETAILED DESCRIPTION OF THE INVENTION

[0036] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be described in more detail below in conjunction with the drawings and examples. It should be understood that the specific examples described herein are only for the purpose of interpreting the present invention, and do not limit the present application.

[0037] It should be noted that when an element is referred to as being "fixed to" or "mounted on" another element, the element may be directly or indirectly located on the element. When an element is referred to as being "connected to" another element, the element may be directly or indirectly connected to the element. The orientations or positional relationships indicated by the terms "up," "down," "left," "right," etc. are based on the orientations or positional relationships shown in the drawings and are merely for convenience of description. They do not indicate or imply that the referenced devices or elements must have a particular orientation, be configured, and operate in a particular orientation. Therefore, they should not be understood as limitations on the present application; those skilled in the art can understand the specific meanings of the terms according to the specific circumstances. The terms "first" and "second" are merely for ease of description and cannot be understood as indicating or implying relative importance or the number of technical features. Unless otherwise clearly and specifically limited, the meaning of "plurality" is two or more.

[0038] In order to describe the technical solution according to the present application, the following will be described in detail in conjunction with specific drawings and embodiments.

[0039] Currently, new energy, or renewable energy, is playing an increasingly important role in social development, and the application and widespread use 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 energies are converted into easily storable and usable electrical energy and applied in various industries according to the electrical energy output method. To convert and store renewable energy into electrical energy, new energy batteries are required. New energy batteries include, but are not limited to, lithium batteries, nickel-metal hydride batteries, lead-acid batteries, etc., among which lithium batteries have significant advantages over other types of batteries. Therefore, various companies, university research institutes, etc. are all focusing on the research and development of lithium batteries. Hereinafter, new energy batteries will be collectively referred to as batteries.

[0040] Generally, a battery includes a case 10 and at least one battery cell 20, with most batteries being assembled with multiple battery cells 20 to meet high power demands. Hereinafter, the battery will be described as being assembled with multiple battery cells 20 as an example. An internal cavity 11 is formed in the case 10, and the multiple battery cells 20 are mounted in a concentrated manner within the internal cavity 11, as shown in FIG. 1. The multiple battery cells 20 are electrically connected in parallel, in series, or in a combination of series and parallel connections, thereby outputting electrical energy with the required output voltage and output current.

[0041] During the use of a battery, deterioration is inevitable after a certain period of use, or the temperature of the battery constantly rises during use, or the battery is affected by abnormalities in the use environment (such as overcharging, over-discharging, pressure, collision, etc.), and all of these factors may make the battery cells 20 of the battery more susceptible to thermal runaway. When the battery cells 20 experience thermal runaway, in addition to causing high temperature risks (i.e., combustion risks), they may also release CO, HF, HCl, C x H yThermal runaway involves the generation of solid particulate matter and / or liquids containing toxic and harmful gases such as Co, Ni, Co, Mn, and other toxic and harmful heavy metals, which ultimately mix with the gas to form flue gas. When these flue gases accumulate in the internal cavity 11, the pressure and the concentration of the solid particulate matter and / or liquid within the internal cavity 11 rise rapidly and instantaneously. For this reason, the flue gases generated when the battery cell 20 experiences thermal runaway must be effectively exhausted from the internal cavity 11.

[0042] In the related art, exhaust gases generated when a battery cell 20 experiences thermal runaway are directly discharged from the internal cavity 11. Although the direct discharge method is the simplest and fastest method, it does not reduce the toxicity of the exhaust gases, and the directly discharged exhaust gases pollute the environment and pose a risk to the life and health of users and others.

[0043] In order to reduce the harmful effects of exhaust gases generated when thermal runaway occurs in the battery cell 20, the battery according to the embodiment of the present application adopts a treatment-and-discharge method, which can be designed according to actual needs to reduce the harmful effects of exhaust gases, protect the environment, and ensure the safety of life and health of users and others.

[0044] As shown in FIGS. 1 and 2 , a battery 200 according to an embodiment of the present application includes a case 10, battery cells 20, a first partition plate 30, and a flue gas treatment device 40. The case 10 has an internal cavity 11, and the battery cells 20 are installed in the internal cavity 11. In the embodiment of the present application, one battery cell 20 is illustrated as shown in FIG. 1 . The battery cell 20 is provided with a pressure relief mechanism 21. In the embodiment of the present application, the first partition plate 30 is installed in the case 10, and the first partition plate 30 divides the internal cavity 11 into a first cavity 111 and a second cavity 112. The battery cells 20 are installed in the first cavity 111. A first through-hole 31 is formed in the first partition plate 30, and the first cavity 111 and the second cavity 112 communicate with each other via the first through-hole 31. The pressure relief mechanism 21 is installed opposite the first through-hole 31, and flue gas generated in the battery cell 20 is discharged through the pressure relief mechanism 21. The flue gas discharged from the battery cell 20 flows into the second cavity 112 through the first through-hole 31. The flue gas treatment device 40 is attached to the second cavity 112 and is used to treat the flue gas that has flowed into the second cavity 112. After treatment of the flue gas is completed, the harmfulness of the flue gas is reduced, and the flue gas is then discharged to the outside of the battery 200, thereby reducing and even avoiding harm to the life and health of the user and other persons, and protecting the safety of the life and health of the user and other persons.

[0045] In some embodiments, when the case 10 is assembled using a bottom plate, a cover plate 13, and four side plates to form a rectangular or cubic case (where the bottom plate and the four side plates are assembled to form the interior cavity space 14), the interior cavity 11 is a corresponding rectangular or cubic interior cavity space 14. At this time, each battery cell 20 adopts a corresponding rectangular or cubic outer contour. In this way, each battery cell 20 can fit into the interior cavity 11, thereby fitting more battery cells 20 into the limited space of the interior cavity 11 and thereby improving the energy efficiency of the battery.

[0046] In some other embodiments, the case 10 may be formed as a regular polygonal prism-shaped case by assembling a bottom plate, a cover plate 13, and multiple side plates (where the bottom plate and multiple side plates are assembled to form the internal cavity 14), and the internal cavity 11 may be the corresponding regular polygonal prism-shaped internal cavity 14. Alternatively, the case 10 may be formed as a cylindrical case by assembling a bottom plate, a cover plate 13, and one side plate (where the bottom plate and one side plate are assembled to form the internal cavity 14), and the internal cavity 11 may be the corresponding cylindrical internal cavity 14. In this case, each battery cell 20 may have a corresponding cylindrical outer contour. In this way, each cylindrical battery cell 20 may fit into the regular polygonal prism-shaped or cylindrical internal cavity 11, thereby fitting more battery cells 20 into the limited space of the internal cavity 11 and thereby improving the energy efficiency of the battery.

[0047] In some embodiments, the case 10 is made of aluminum, which has superior ductility and plasticity compared to other metals (e.g., compared to iron), and the case 10 made of aluminum is lighter in weight. Furthermore, the structural strength of the case 10 made of aluminum is sufficient to meet the structural strength requirements of the battery assembly.

[0048] The pressure relief mechanism 21 is an element or component that activates to release internal pressure when the internal pressure or temperature of the battery cell 20 reaches a predetermined threshold. Here, "activation" refers to the pressure relief mechanism 21 operating to release the internal pressure and temperature of the battery cell 20. The operation of the pressure relief mechanism 21 may include, but is not limited to, at least a portion of the pressure relief mechanism 21 rupturing, tearing, or melting. After the pressure relief mechanism 21 activates, high-temperature exhaust gas inside the battery cell 20 is discharged to the outside through the pressure relief mechanism 21. This predetermined threshold may be adjusted according to different design needs. The predetermined threshold may depend on one or more materials of the positive electrode plate, negative electrode plate, electrolyte, and separator in the battery cell 20. The pressure relief mechanism 21 may be, for example, a pressure- or temperature-sensitive element or component, i.e., when the internal pressure or temperature of the battery cell 20 reaches a predetermined threshold, the pressure relief mechanism 21 is activated to form a channel for releasing the internal pressure or temperature. The pressure relief mechanism 21 being disposed opposite the first through-hole 31 specifically means that the pressure relief mechanism 21 is disposed directly opposite the first through-hole 31, i.e., the pressure relief mechanism 21 is in direct communication with the first through-hole 31, or a communication passage may be provided on one side of the first partition plate 30 away from the second cavity 112, the communication passage communicates with the first through-hole 31, and the pressure relief mechanism 21 is disposed opposite the communication passage.

[0049] As shown in Figure 2, the flue gas treatment device 40 of the battery 200 in this embodiment includes a cooling unit 41 for cooling the flue gas flowing into the second cavity 112. When the battery cell 20 experiences thermal runaway, high-temperature flue gas is generated within the battery cell 20. The generated flue gas contains solid particulate matter 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 cavity 112 through the first through-hole 31, the temperature and pressure within the second cavity 112 rise rapidly, and the concentration of solid particulate matter and / or liquids in the flue gas increases. If the wall of the second cavity 112 ruptures due to the pressure of the flue gas, the flue gas with an increased concentration of solid particulate matter and / or liquids will combine with oxygen in the air, potentially causing combustion under the high-temperature flue gas conditions. Therefore, the flue gas treatment device 40 is designed with a cooling unit 41, so that when the flue gas flows into the second cavity 112, the cooling unit 41 exchanges heat with the flue gas flowing into the second cavity 112, thereby lowering the temperature of the flue gas. Even if the case 10 bursts due to a sudden increase in pressure and the flue gas comes into contact with the air, the temperature of the flue gas has already been lowered through heat exchange with the cooling unit 41, reducing the possibility of the flue gas burning.

[0050] 1 to 4 , the cooling unit 41 includes an exhaust baffle 411, which is mounted in the second cavity 112. The exhaust baffle 411 and the first partition plate 30 are spaced apart to form a first flow path 412 that guides the flue gas that has flowed into the second cavity 112. The first flow path 412 communicates with the first through-holes 31. That is, when thermal runaway occurs in the battery cell 20, the flue gas generated in the battery cell 20 is discharged from the pressure relief mechanism 21 and flows directly into the first flow path 412 through the first through-holes 31. By installing the exhaust baffle 411 and forming the first flow path 412, the flue gas discharged from the pressure relief mechanism 21 flows along the first flow path 412, so that the flue gas does not randomly scatter and flow in all directions, that is, the flue gas flows into the second cavity 112 regularly, and does not randomly diffuse within the second cavity 112. Furthermore, by installing the exhaust baffle 411 and forming the first flow path 412, most or even all of the flue gas can be guided to the cooling unit 41 for heat exchange, thereby cooling the flue gas and reducing the possibility of the flue gas burning.

[0051] In some embodiments, the first partition plate 30 and / or the exhaust baffle 411 are installed as a liquid cooling plate, which is used to cool the flue gas flowing into the first flow path 412 by performing heat exchange with the flue gas. Here, a coolant is accommodated inside the liquid cooling plate, and the coolant exchanges heat with the flue gas to cool the flue gas. The coolant may be water, a mixture of water and ethylene glycol, or the like, and the coolant may flow in a cyclic manner. When thermal runaway occurs in the battery cell 20, the flue gas generated in the battery cell 20 is discharged through the pressure relief mechanism 21 and enters the first flow path 412. At this time, the flue gas in the first flow path 412 comes into contact with the liquid cooling plate and performs heat exchange, and the coolant in the liquid cooling plate absorbs at least a portion of the heat from the flue gas. That is, the flue gas immediately after being discharged from the pressure relief mechanism 21 and flowing into the first flow path 412 can exchange heat with the liquid cooling plate, thereby achieving a greater degree of cooling and lowering of the flue gas temperature, and further reducing the possibility of flue gas combustion, thereby further improving the efficiency of cooling and lowering of the flue gas temperature.

[0052] In some embodiments, as shown in Figures 8 and 9, a plurality of second partition plates 413 are provided in the first flow path 412. Two adjacent second partition plates 413 are spaced apart. A first space 4130 is formed between two adjacent second partition plates 413, and the two adjacent first spaces 4130 communicate with each other to form the first flow path 412. In this way, the path distance along which the flue gas flows along the first flow path 412 is lengthened, i.e., the time the flue gas spends flowing through the first flow path 412 is longer, which is beneficial to cooling and lowering the temperature of the flue gas. Furthermore, if the first partition plate 30 and / or the exhaust baffle 411 are installed as liquid cooling plates, the time the flue gas spends in contact with the liquid cooling plate for heat exchange is longer, which allows the liquid cooling plate to more effectively exchange heat with the flue gas, and the liquid cooling plate can absorb more heat to cool and lower the temperature of the flue gas.

[0053] In some embodiments, each second partition plate 413 is a plate member made of a metal material, including but not limited to copper, aluminum, steel, etc. Metal materials have excellent heat conductivity, and one end of each second partition plate 413 is abutted against the first partition plate 30 and / or the other end of each second partition plate 413 is abutted against the exhaust baffle 411. When the first partition plate 30 and / or the exhaust baffle 411 are set as liquid cooling plates, each second partition plate 413 can quickly transfer the heat of the flue gas to the liquid cooling plate, so that the cooling liquid in the liquid cooling plate absorbs the heat transferred from each second partition plate 413. That is, when the flue gas flows through the first flow path 412 and the first partition plate 30 and / or the exhaust baffle 411 are installed as liquid cooling plates, the flue gas not only contacts the liquid cooling plate, but also contacts each second partition plate 413, and the flue gas transfers heat to each second partition plate 413, which then transfers heat to the liquid cooling plate, and the cooling liquid in the liquid cooling plate absorbs the heat transferred from each second partition plate 413. In this way, the liquid cooling plate can further improve the effect of cooling the flue gas and reducing its temperature, and the flue gas can absorb as much heat as possible.

[0054] 8 and 9, the plurality of first intervals 4130 are connected in series, forming a serpentine first flow path 412, which further lengthens the path distance along which the flue gas flows, which is beneficial to the cooling and lowering of the flue gas temperature. Furthermore, when the first partition plate 30 and / or the exhaust baffle 411 are installed as liquid cooling plates, the flue gas can be in sufficient contact with the liquid cooling plate and each second partition plate 413, which improves the cooling and lowering efficiency.

[0055] 8 , the battery 200 further includes a liquid pump 51 for transporting the coolant to the liquid cooling plate. A pressure sensor 52 is attached in the first flow path 412 and is electrically connected to the liquid pump 51. When thermal runaway occurs in the battery cell 20, exhaust gas generated in the battery cell 20 is discharged from the pressure relief mechanism 21 and enters the first flow path 412, thereby rapidly increasing the pressure in the first flow path 412. The pressure sensor 52 detects the increase in pressure in the first flow path 412 and then transmits a detection signal indicating the increase in pressure in the first flow path 412 to the liquid pump 51. The liquid pump 51 increases the flow rate and flow velocity of the coolant based on the detection signal indicating the increase in pressure in the first flow path 412 transmitted from the pressure sensor 52. When thermal runaway occurs in the battery cell 20, the flue gas is instantly discharged from the pressure relief mechanism 21 and flows into the first flow path 412, causing a large amount of flue gas to instantly accumulate in the first flow path 412, that is, a large amount of heat is instantly accumulated in the first flow path 412. At this time, by increasing the flow rate and flow velocity of the coolant in the liquid cooling plate, the cooling cycle of the coolant can be increased, thereby improving the efficiency of absorbing heat from the flue gas flowing into the first flow path 412, and the flue gas flowing into the first flow path 412 can be quickly cooled and reduced in temperature.

[0056] In some other embodiments of the present application, the battery 200 further includes a liquid pump 51 for pumping the coolant to the liquid cooling plate. A temperature sensor (not shown) is attached in the first flow path 412, and the temperature sensor is used to detect the temperature in the first flow path 412. The temperature sensor is also electrically connected to the liquid pump 51, and the liquid pump 51 adjusts the flow rate and flow speed of the coolant based on the temperature in the first flow path 412 detected by the temperature sensor. If thermal runaway occurs in the battery cell 20, the high-temperature flue gas generated in the battery cell 20 will be discharged from the pressure relief mechanism 21 and flow into the first flow path 412 through the first through-hole 31 on the first partition plate 30, thereby rapidly increasing the temperature in the first flow path 412. The temperature sensor will detect the increase in temperature in the first flow path 412 and then send a detection signal of the temperature increase in the first flow path 412 to the liquid pump 51. Based on the detection signal sent from the temperature sensor, the liquid pump 51 will increase the flow rate and flow speed of the coolant transported to the liquid cooling plate, thereby improving the efficiency of removing heat transferred to the liquid cooling plate, and the high-temperature flue gas in the first flow path 412 can be quickly cooled and reduced in temperature.

[0057] In some other embodiments of the present application, the cooling device further includes a liquid pump 51 for pumping the cooling liquid to the liquid cooling plate, and a pressure sensor and a temperature sensor are both installed in the first flow path 412, and the pressure sensor and the temperature sensor are both electrically connected to the liquid pump 51. When the high-temperature flue gas flows into the first flow path 412, the pressure sensor and the temperature sensor detect that the pressure and temperature in the first flow path 412 increase, respectively, and then the pressure sensor and the temperature sensor both send detection signals to the liquid pump 51. 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 signal at the same time, the liquid pump 51 increases the flow rate and flow velocity of the cooling liquid transported to the liquid cooling plate, thereby improving the efficiency of removing heat transferred to the liquid cooling plate, and the high-temperature flue gas in the first flow path 412 can be quickly cooled and reduced in temperature.

[0058] 3 , the cooling unit 41 further includes a heat absorption structure 42, which is disposed on one side of the exhaust baffle 411 away from the first partition plate 30 and communicates with the first flow passage 412. The heat absorption structure 42 is used to absorb heat from the flue gas. The flue gas flows into the heat absorption structure 42 to be further cooled, thereby further reducing the possibility of combustion of the flue gas flowing into the second cavity 112.

[0059] In some embodiments, the heat-absorbing structure 42 includes a first medium 423 and a second medium 424. An accommodating space 421 is disposed on one side of the exhaust baffle 411 away from the first partition plate 30. The accommodating space 421 communicates with the first flow path 412, and the first medium 423 and the second medium 424 are both disposed within the accommodating space 421. When the flue gas flows into the accommodating space 421 along the first flow path 412, the first medium 423 and the second medium 424 come into contact with each other and generate an endothermic reaction to absorb the heat of the flue gas. When the first medium 423 and the second medium 424 come into contact with each other, they can generate an endothermic reaction, thereby absorbing the heat of the high-temperature flue gas and quickly cooling the high-temperature flue gas.

[0060] In some embodiments, the heat absorption structure 42 further includes a third partition plate 422, which is disposed in the accommodating space 421 and divides the accommodating space 421 into a first accommodating cavity 4211 and a second accommodating cavity 4212. The first medium 423 is disposed in the first accommodating cavity 4211, and the second medium 424 is disposed in the second accommodating cavity 4212. The first accommodating cavity 4211 communicates with the first flow path 412. When the flue gas flows into the first accommodating cavity 4211 along the first flow path 412, the first accommodating cavity 4211 and the second accommodating cavity 4212 communicate with each other, allowing the first medium 423 and the second medium 424 to come into contact with each other, thereby generating an endothermic reaction and absorbing the heat of the flue gas.

[0061] As shown in Figures 1-3, in some embodiments, the second cavity 112 is located below the first cavity 111 and defines an orientation such as up, down, left, right, front, and back when the battery is in normal use.

[0062] 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 available on the market and is inexpensive, and water is tap water that can be directly obtained, thereby reducing the production cost of the battery and creating a low-cost advantage.

[0063] In some embodiments, the third partition plate 422 is a plate member made of a metal material, including, but not limited to, a plate member made of a metal aluminum material or a plate member made of a metal copper material.

[0064] In some embodiments, as shown in FIG. 10 , the third partition plate 422 is provided with a second through-hole, and a control valve 4221 is attached to the second through-hole. The control valve 4221 is used to open when flue gas flows into the first receiving cavity 4211, thereby connecting the first receiving cavity 4211 and the second receiving cavity 4212. The second medium 424 enters the first receiving cavity 4211 and contacts the first medium 423, causing an endothermic reaction to occur and absorbing the heat of the flue gas. The third partition plate 422 is actively opened by opening the control valve 4221 to connect the first receiving cavity 4211 and the second receiving cavity 4212. The control valve 4221 can be, but is not limited to, an electromagnetic control valve, a thermal expansion valve, etc. In this embodiment, the control valve 4221 must be assembled and operated in cooperation with the pressure sensor 52, and the control valve 4221 is electrically connected to the pressure sensor 52. If thermal runaway occurs in the battery cell 20, the flue gas generated in the battery cell 20 will be discharged through the pressure relief mechanism 21 and enter the first flow path 412, causing the pressure in the first flow path 412 to increase rapidly. The pressure sensor 52 will detect the increase in pressure in the first flow path 412 and send a detection signal of the increase in pressure in the first flow path 412 to the control valve 4221. The control valve 4221 will open based on the detection signal of the increase in pressure in the first flow path 412 sent from the pressure sensor 52. The control valve 4221 has a sensitive and fast response, and allows the second medium 424 in the second accommodating cavity 4212 to enter the first accommodating cavity 4211 and come into contact with the first medium 423, causing an endothermic reaction to occur and absorb the heat of the flue gas, thereby cooling the flue gas and lowering its temperature.

[0065] 10 , a second through-hole is provided in the third partition plate 422, and a blocking member 4221′ made of a heat-melting material is attached to the second through-hole, so that when the flue gas flows into the first receiving cavity 4211, the blocking member 4221′ melts under the heat to connect the first receiving cavity 4211 and the second receiving cavity 4212. The manner in which the blocking member 4221′ made of a heat-melting material is attached to the second through-hole of the third partition plate 422, and the high temperature of the flue gas melts the blocking member 4221′ to connect the first receiving cavity 4211 and the second receiving cavity 4212 is a passive opening manner. In this embodiment, if thermal runaway occurs in the battery cell 20, the exhaust gas generated in the battery cell 20 will be discharged from the pressure relief mechanism 21 and enter the first flow path 412. The high-temperature exhaust gas will then flow into the first accommodating cavity 4211 and come into contact with the thermally fusible material blocking member 4221'. The high-temperature exhaust gas will melt the thermally fusible material blocking member 4221', causing the second medium 424 in the second accommodating cavity 4212 to enter the first accommodating cavity 4211 through the second through-hole and come into contact with the first medium 423. The second medium 424 and the first medium 423 will then undergo an endothermic reaction, absorbing the heat from the exhaust gas and thereby cooling the exhaust gas.

[0066] In some embodiments, the third partition plate 422 is a plate member made of a heat-melting material, and when flue gas flows into the first accommodating cavity 4211, the third partition plate 422 melts under heat to connect the first accommodating cavity 4211 and the second accommodating cavity 4212. The manner in which the third partition plate 422 is made of a heat-melting material and the high temperature of the flue gas melts the third partition plate 422 to connect the first accommodating cavity 4211 and the second accommodating cavity 4212 is a passive opening manner. In this embodiment, if thermal runaway occurs in the battery cell 20, the exhaust gas generated in the battery cell 20 will be discharged from the pressure relief mechanism 21 and enter the first flow path 412. The high-temperature exhaust gas will then flow into the first accommodating cavity 4211 and contact the third partition plate 422. The high-temperature exhaust gas will at least partially melt the third partition plate 422 made of a heat-fusible material. The second medium 424 in the second accommodating cavity 4212 will enter the first accommodating cavity 4211 through the melted position and come into contact with the first medium 423. The second medium 424 and the first medium 423 will then undergo an endothermic reaction to absorb the heat of the exhaust gas, thereby cooling the exhaust gas and decreasing its temperature.

[0067] 4 to 7 , in some embodiments, the first accommodating cavity 4211 is located below the second accommodating cavity 4212, and a first inlet 4213 is provided on the bottom wall of the first accommodating cavity 4211, and the first accommodating cavity 4211 communicates with the first channel 412 through the first inlet 4213. The high-temperature flue gas first flows from the first channel 412 below the bottom wall of the first accommodating cavity 4211, and then the flue gas flows from bottom to top through the first inlet 4213 into the first accommodating cavity 4211. The provision of the first inlet 4213 can facilitate the flue gas to smoothly enter the first accommodating cavity 4211.

[0068] In some embodiments, the number of first inlets 4213 is plural, and the plural first inlets 4213 are arranged in an array. Optionally, the plural first inlets 4213 are arranged in a rectangular array. Such a design is advantageous for allowing the flue gas to smoothly enter the first accommodating cavity 4211. Optionally, the density per unit area of ​​the first inlets 4213 distributed on the bottom wall of the first accommodating cavity 4211 becomes smaller along the direction of flue gas flow. In this way, when the flue gas flows under the bottom wall of the first accommodating cavity 4211, some of the flue gas immediately flows into the first accommodating cavity 4211 through the first inlets 4213, and some of the flue gas continues to flow along the bottom wall of the first accommodating cavity 4211, and this part of the flue gas also flows into the first accommodating cavity 4211 through the other first inlets 4213. That is, when the flue gas flows from the first passage 412 into the bottom wall of the first accommodating cavity 4211, the first inlets 4213 are arranged to be gradually distributed sparsely along the flow direction of the flue gas. In this way, during the process of the flue gas flow, the flue gas gradually flows from the first inlets 4213 into the first accommodating cavity 4211. The fewer the number of first inlets 4213 on the bottom wall of the first accommodating cavity 4211 along the flow direction of the flue gas, the more reasonably the distribution of the first inlets 4213 can be achieved with this design.

[0069] 7 , a second inlet 4214 is installed on the side wall of the first accommodating cavity 4211, and the first accommodating cavity 4211 and the first channel 412 communicate with each other through the second inlet 4214. That is, the flue gas flows along the first channel 412, and the flue gas can flow into the first accommodating cavity 4211 through the second inlet 4214. The installation of the second inlet 4214 can facilitate the flue gas to smoothly enter the first accommodating cavity 4211.

[0070] In some embodiments, a plurality of cooling units 41 are provided, and the plurality of cooling units 41 are sequentially connected to each other. That is, the plurality of cooling units 41 are sequentially connected to each other along the direction of the flue gas flow. The plurality of cooling units 41 may be the same or different. The plurality of cooling units 41 are used to cool the high-temperature flue gas and reduce its temperature, thereby further reducing the possibility of combustion of the cooled and reduced-temperature flue gas.

[0071] When a plurality of cooling units 41 are provided, two adjacent cooling units 41 are installed with a gap between them, and when a circulation outlet 4215 is opened on the side wall facing the second inlet 4214 of the first receiving cavity 4211 of the preceding cooling unit 41, the first inlet 4213 and the second inlet 4214 of the succeeding cooling unit 41 communicate with the circulation outlet 4215. Furthermore, in any one cooling unit 41, after the second medium 424 in the second receiving cavity 4212 enters the first receiving cavity 4211, the height of the second medium 424 is lower than the height of the circulation outlet 4215.

[0072] In some embodiments, the flue gas treatment device 40 includes a separation unit 43 for separating solid particulate matter and / or liquid in the flue gas flowing into the second cavity 112. When the battery cell 20 experiences thermal runaway, high-temperature flue gas is generated within the battery cell 20. The generated flue gas contains solid particulate matter and / or liquid, such as Ni, Co, and Mn. When the flue gas is discharged from the pressure relief mechanism 21 and flows into the second cavity 112 through the first through-hole 31, the temperature and pressure within the second cavity 112 rise rapidly, and the concentration of solid particulate matter and / or liquid in the flue gas increases. If the wall of the second cavity 112 bursts under the flue gas pressure or the high-temperature flue gas is directly discharged outside the battery 200, the flue gas with an increased concentration of solid particulate matter and / or liquid may combine with oxygen in the air, and combustion may occur due to the high temperature of the flue gas. Therefore, the flue gas treatment device 40 is designed with a separation unit 43. When the flue gas flows into the second cavity 112, the separation unit 43 separates and filters the solid particulate matter and / or liquid in the flue gas, thereby reducing the concentration of the solid particulate matter and / or liquid in the flue gas. In this way, no black smoke will be generated when the flue gas from which the solid particulate matter and / or liquid has been separated and filtered is discharged to the outside of the battery 200. Even if the case 10 bursts due to a sudden increase in pressure and the flue gas comes into contact with the air, the concentration of the solid particulate matter and / or liquid in the flue gas has already been reduced, so the flue gas discharged to the outside of the battery 200 is nearly transparent and has a relatively light pungent odor (eventually, no odor at all), which not only protects the environment but also does not cause discomfort to the user or other people.

[0073] In some embodiments, as shown in FIGS. 1 and 4 to 6 , the separation unit 43 includes an adsorption / filtration structure 431 for adsorbing and filtering solid particulate matter and / or liquid in the flue gas. The adsorption / filtration structure 431 is mounted in the second cavity 112. When thermal runaway occurs in the battery cell 20, the flue gas discharged from the battery cell 20 flows into the second cavity 112 through the first through-holes 31. The adsorption / filtration structure 431 adsorbs and separates the solid particulate matter and / or liquid in the flue gas, thereby reducing the concentration of the solid particulate matter and / or liquid in the flue gas. The adsorption / filtration structure 431 can be made of, but is not limited to, activated carbon filter cotton, honeycomb activated carbon filter netting, coconut shell activated carbon filter netting, honeycomb ceramic filter material, etc. The adsorption / filtration structure 431 must be able to withstand high temperatures.

[0074] 1, 5 and 8, the separation unit 43 further includes a plurality of fourth partition plates 432, where two adjacent fourth partition plates 432 are spaced apart, and second spaces 4320 formed between the two adjacent fourth partition plates 432 communicate with each other to form second flow paths 433, and the adsorption filtering structure 431 is disposed in the second flow paths 433. The second flow paths 433 formed by the plurality of fourth partition plates 432 increase the path distance that the flue gas flows through the adsorption filtering structure 431, thereby further adsorbing and filtering the solid particulate matter and / or liquid in the flue gas and reducing the concentration of the solid particulate matter and / or liquid in the flue gas.

[0075] 5, the plurality of second spaces 4320 are connected in series, forming a serpentine second flow path 433, which further increases the path distance along which the flue gas flows along the second flow path 433. In this manner, the adsorption filtering structure 431 more effectively adsorbs and filters the solid particulate matter and / or liquid in the flue gas, improving the adsorption filtering efficiency for the solid particulate matter and / or liquid in the flue gas.

[0076] In some embodiments, a plurality of separation units 43 are provided, and the plurality of separation units 43 are connected in series. That is, the plurality of separation units 43 are connected in series along the flow direction of the flue gas. The adsorption / filtering structures 431 used in each separation unit 43 may be the same or different. For example, when two separation units 43 are connected, the first separation unit 43 may include, but is not limited to, an activated carbon filter cotton, and the second separation unit 43 may include, but is not limited to, a coconut shell activated carbon filter net. Optionally, the structures of the plurality of separation units 43 may be the same or different. This further improves the adsorption / filtering efficiency of solid particulate matter and / or liquid in the flue gas.

[0077] 10, the separation unit 43 is installed as an independent separation device 60 relative to the case 10, and the separation device 60 includes one or more of the following devices connected in sequence: a cyclone separation device, a gravity separation device, an inertial force separation device, a wet foam separation device, and an electrostatic separation device. 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 each independent devices relative to the case 10 and connected to the second cavity 112 via a pipe, so that the flue gas flowing into the second cavity 112 is guided to the separation device to separate and filter the solid particulate matter and / or liquid in the flue gas.

[0078] A cyclone separator is a device used to separate gas-solid or liquid-solid systems. Its working principle is to use the rotational motion of the tangential airflow to shake solid particles or liquid droplets, which have a relatively large inertial centrifugal force, onto the outer wall surface. The main features of a cyclone separator are its simple structure, high operational flexibility, relatively high efficiency, and easy management and maintenance, making it a separation device that is widely used in industry.

[0079] Gravity separation devices are also called gravity separators because their main separation action is achieved by utilizing the density difference (i.e., the gravity difference in a gravitational field) between the medium and the material to be separated.

[0080] Inertial force separators, also known as momentum separators, achieve separation by utilizing the inertia of particles or droplets entrained in the gas flow. An obstacle is placed in the gas flow path, causing the airflow to suddenly change direction as it goes around the obstacle, resulting in particles or droplets colliding with the obstacle and being collected. The smaller the radius of curvature of the airflow change, the higher the separation efficiency. Inertial separators are similar to cyclone separators. Instead of rigid baffles, loose fibrous material may be packed inside the separator. In this case, sedimentation, inertia, and filtration all contribute to a certain separation effect. Wetting the packing with a viscous liquid can also improve separation efficiency.

[0081] Wet foam separation equipment works on the principle of adsorption by bubbling a liquid containing a surfactant, causing the surfactant in the liquid to condense at the gas-liquid interface (the surface of the bubbles), forming a foam layer above the liquid body, separating the foam layer from the liquid body, concentrating the surfactant (in the foam layer) and purifying the liquid body. The concentrated substance can be a surfactant or a substance that can entangle with the surfactant, but it must have the ability to entangle or chelate with a certain surfactant. This method of bubbling a gas into a solution to achieve separation or concentration goals is generally referred to as foam adsorption separation technology, or foam separation technology for short. Therefore, wet foam separation equipment is also called a foam adsorption separator.

[0082] Electrostatic separators, also known as electrostatic separation equipment, use high-voltage static electricity to separate conductive and non-conductive materials, with high separation efficiency and a separation rate of up to 99%.

[0083] In some embodiments, the battery may include only the cooling unit 41, which cools the flue gas when it is discharged from the pressure relief mechanism 21 and flows into the second cavity 112 through the first through-holes 31 to reduce the temperature of the flue gas, thereby reducing the likelihood of the flue gas burning. Alternatively, in other embodiments, the battery may include only the separation unit 43, which separates and filters solid particulate matter and / or liquid in the flue gas when it is discharged from the pressure relief mechanism 21 and flows into the second cavity 112 through the first through-holes 31 to reduce the concentration of solid particulate matter and / or liquid in the flue gas.

[0084] 2 , the flue gas treatment device 40 not only includes the cooling unit 41 but also includes a separation unit 43, which is located downstream of the cooling unit 41 along the flow direction of the flue gas and communicates with the cooling unit 41. That is, the inlet of the second flow path 433 of the separation unit 43 communicates with the flow outlet 4215 of the cooling unit 41, thereby communicating the separation unit 43 with the cooling unit 41. In the embodiment of the present application, when thermal runaway occurs in the battery cell 20, high-temperature flue gas is generated within the battery cell 20, and the generated flue gas contains solid particulate matter such as Ni, Co, Mn, and / or liquid. When the flue gas is discharged from the pressure relief mechanism 21 and flows into the second cavity 112 through the first through-hole 31, the cooling unit 41 first cools and lowers the temperature of the flue gas. After being cooled and lowered, the flue gas flows into the separation unit 43 for adsorption and filtration, thereby reducing the concentration of solid particulate matter and / or liquid in the flue gas.

[0085] In the embodiment of the present application, as shown in Figures 1, 2, 5 and 8, an exhaust hole is provided in the case 10, and the exhaust hole is used to discharge the flue gas treated by the flue gas treatment device to the outside of the battery 200. Optionally, a battery explosion-proof valve 12 is attached to the exhaust hole, and the battery explosion-proof valve 12 is used to discharge the treated flue gas 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 path 433 of the separation unit 43 communicate with the battery explosion-proof valve 12. When thermal runaway occurs in the battery cell 20, the flue gas generated by the battery cell 20 is cooled and cooled by the cooling unit 41 and / or separated and filtered by the separation unit 43, so that the flue gas is treated into a low-temperature and low-pollution gas, which is then discharged to the outside of the battery 200 through the battery explosion-proof valve 12. In this way, when the flue gas treated by the flue gas treatment device 40 is discharged outside the battery 200, the possibility of the flue gas burning is reduced, which not only protects the safety of the life and property of users and others, but also reduces the pollution hazard of flue gas and protects the environment.

[0086] When the separation unit 43 is installed as one or more of a cyclone separator, a gravity separator, an inertia separator, a wet foam separator, and an electrostatic separator, the separation device is connected to the battery explosion-proof valve 12 through a pipeline, and as shown in Figure 10, the flue gas is input to the separation device through the pipeline from the second cavity 112 through the battery explosion-proof valve 12, and the separation device separates and filters the solid particulate matter and / or liquid in the flue gas. The separation device then discharges the filtered flue gas from the battery 200 to the outside.

[0087] According to another aspect of the embodiment of the present application, a power consumption device 100 is provided, as shown in Fig. 11. In the embodiment of the present application, the power consumption device 100 includes the battery 200 provided as described above, and the battery 200 provides electrical energy for the normal operation of the power consumption device 100. Here, the power consumption device 100 includes, but is not limited to, a new energy electric vehicle. Alternatively, the power consumption device 100 may be a relatively large energy storage device, which stores electrical energy by applying the battery 200 provided above.

[0088] In the embodiment of the present application, the battery includes a case 10, a plurality of battery cells 20, a first partition plate 30, an exhaust baffle 411, a plurality of second partition plates 413, a first medium 423, a second medium 424, an adsorption filtering structure 431, and a plurality of fourth partition plates 432. The internal cavity 11 of the case 10 is divided into a first cavity 111 and a second cavity 112 by the first partition plate 30, the plurality of battery cells 20 are installed in the first cavity 111, and the exhaust baffle 411, the second partition plate 413, the first medium 423, the second medium 424, the adsorption filtering structure 431, and the fourth partition plate 432 are all installed in the second cavity 112. The plurality of second partition plates 413 are installed between the first partition plate 30 and the exhaust baffle 411 and form a serpentine first flow path 412. Furthermore, an accommodating space 421 is installed on one side of the exhaust baffle 411 away from the first partition plate 30, and the accommodating space 421 is connected to the first flow path 412. The accommodating space 421 is divided by a third partition plate 422 into a first accommodating cavity 4211 and a second accommodating cavity 4212 (the first accommodating cavity 4211 is located below the second accommodating cavity 4212), which are vertically distributed. A first medium 423 is installed in the first accommodating cavity 4211, and the first medium 423 is ammonium chloride. A second medium 424 is installed in the second accommodating cavity 4212, and the second medium 424 is water. Here, the third partition plate 422 is made of a heat-melting material. The plurality of fourth baffles 432 are spaced apart to form a serpentine second flow path 433, which communicates with the first accommodating cavity 4211, and the adsorption / filtering structure 431 is disposed within the second flow path 433. In this way, if the battery cell 20 experiences thermal runaway, the flue gas generated within the battery cell 20 is discharged and flows into the first flow path 412, and then flows into the first accommodating cavity 4211. At this time, the third partition plate 422 melts due to the heat, bringing the first medium 423 and the second medium 424 into contact with each other and causing an endothermic reaction to occur, absorbing the heat of the flue gas.The cooled flue gas then flows into the second flow path 433, and during the flow process, the solid particulate matter and / or liquid in the flue gas are adsorbed and filtered by the adsorption and filtering structure 431, so that the flue gas output from the battery 200 has a low temperature and is less polluted.

[0089] The above are only selective examples of the present application and are not intended to limit the present application. Those skilled in the art will appreciate that the present application can undergo various modifications and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included within the scope of the claims of the present application. [Explanation of symbols]

[0090] 200 batteries, 10 case, 11 internal cavity, 111 first cavity, 112 second cavity, 12 battery explosion prevention valve, 13 cover plate, 14 internal cavity space, 20 battery cell, 21 pressure relief mechanism, 30 first partition plate, 31 first through hole, 40 flue gas treatment device, 41 cooling unit, 411 exhaust baffle, 412 first flow path, 413 second partition plate, 4130 first interval space, 42 heat absorption structure, 421 accommodating space, 4211 first accommodating cavity, 4212 second accommodating cavity, 4213 first inlet, 4214 second inlet, 4215 circulation outlet, 422 third partition plate, 4221 control valve, 4221' blocking member, 423 first medium, 424 second medium, 43 separation unit, 431 adsorption filtration structure, 432 fourth partition plate, 4320 second interval space, 433 second flow path, 51 Liquid pump, ATP00659_A_ Application specification 52 Pressure sensor, 60 separation equipment, 100 Power consuming equipment.

Claims

1. A battery, a case having an internal cavity formed therein; a battery cell mounted within the internal cavity and provided with a pressure relief mechanism; a first partition plate attached within the case to divide the internal cavity into a first cavity and a second cavity, the battery cell attached within the first cavity, the first partition plate having a first through-hole that communicates with the first cavity and the second cavity, the pressure relief mechanism disposed opposite the first through-hole that allows flue gas discharged from the battery cell via the pressure relief mechanism to flow into the second cavity; a flue gas treatment device attached to the second cavity for treating the flue gas that has flowed into the second cavity and then discharging it to the outside of the battery.

2. 10. The battery of claim 1, wherein the flue gas treatment device includes a cooling unit, the cooling unit being used to cool the flue gas that enters the second cavity.

3. 3. The battery of claim 2, wherein the cooling unit includes an exhaust baffle, the exhaust baffle is mounted in the second cavity, and the exhaust baffle and the first partition plate are spaced apart to form a first flow path for guiding exhaust gas that has flowed into the second cavity, and the first flow path is in communication with the first through-hole.

4. The battery of claim 3, wherein the first partition plate and / or the exhaust baffle are installed as liquid cooling plates, and the liquid cooling plates are used to perform heat exchange with the flue gas that flows into the first flow path to cool the flue gas.

5. a plurality of second partition plates are provided in the first flow path, and two adjacent second partition plates are installed at an interval; one end of each of the second partition plates abuts against the first partition plate, and / or the other end of each of the second partition plates abuts against the exhaust baffle; The battery according to claim 3 , wherein first spaces formed between two adjacent second partition plates communicate with each other to form the first flow path.

6. The battery according to claim 5 , wherein a plurality of the first spaces are connected to each other in series.

7. 5. The battery of claim 4, further comprising a liquid pump, the liquid pump being used to transport coolant to the liquid cooling plate, a pressure sensor and / or a temperature sensor being mounted in the first flow path, the pressure sensor and / or the temperature sensor being electrically connected to the liquid pump.

8. 4. The battery of claim 3, wherein the cooling unit further includes a heat absorption structure, the heat absorption structure is installed on one side of the exhaust baffle away from the first partition plate, the heat absorption structure is in communication with the first flow path, and the heat absorption structure is used to absorb heat from the exhaust gas.

9. 9. The battery of claim 8, wherein the heat-absorbing structure includes a first medium and a second medium, an accommodation space is provided on one side of the exhaust baffle away from the first partition plate, the accommodation space is connected to the first flow path, the first medium and the second medium are both installed in the accommodation space, and when flue gas flows into the accommodation space, the first medium and the second medium come into contact with each other to generate an endothermic reaction and absorb the heat of the flue gas.

10. 10. The battery of claim 9, wherein the heat-absorbing structure further includes a third partition plate disposed in the accommodating space to divide the accommodating space into a first accommodating cavity and a second accommodating cavity, the first medium is disposed in the first accommodating cavity, the second medium is disposed in the second accommodating cavity, the first accommodating cavity is in communication with the first flow path, and when flue gas flows into the first accommodating cavity, the first accommodating cavity is in communication with the second accommodating cavity to bring the first medium and the second medium into contact with each other and generate an endothermic reaction to absorb the heat of the flue gas.

11. 11. The battery of claim 10, wherein the first accommodating cavity is located below the second accommodating cavity, the first accommodating cavity has a bottom wall provided with a first inlet, and the first accommodating cavity communicates with the first flow path through the first inlet.

12. The battery according to claim 11 , wherein the number of the first inlets is plural, and the plural first inlets are arranged in an array.

13. The battery of claim 10 , wherein a second inlet is provided in a sidewall of the first accommodating cavity, and the first accommodating cavity communicates with the first flow path through the second inlet.

14. 10. The battery of claim 9, wherein the first medium is ammonium chloride and the second medium is water.

15. a second through-hole is provided in the third partition plate, and a control valve is attached to the second through-hole, and the control valve is opened when flue gas flows into the first accommodating cavity to communicate with the first accommodating cavity and the second accommodating cavity; Alternatively, the third partition plate is provided with a second through-hole, and a blocking member made of a heat-melting material is attached to the second through-hole, so that when the flue gas flows into the first accommodating cavity, the blocking member is melted by heat to connect the first accommodating cavity with the second accommodating cavity; Alternatively, the third partition plate is a plate member made of a heat-melting material, and when exhaust gas flows into the first accommodating cavity, the third partition plate melts due to heat, thereby connecting the first accommodating cavity and the second accommodating cavity.

16. The battery according to claim 2 , wherein a plurality of the cooling units are provided, and the plurality of cooling units are in communication with each other in sequence.

17. 16. The battery of claim 1, wherein the flue gas treatment device includes a separation unit for separating solid particulate matter and / or liquid in the flue gas that has entered the second cavity.

18. 16. The battery of claim 2, wherein the flue gas treatment device includes a separation unit for separating solid particulate matter and / or liquid in the flue gas that has flowed into the second cavity, the separation unit being in communication with the cooling unit and located downstream of the cooling unit along the flow direction of the flue gas.

19. 20. The battery of claim 18, wherein the separation unit includes an adsorptive filtering structure, and the adsorptive filtering structure is used to adsorb and filter solid particulate matter and / or liquid in flue gas.

20. 20. The battery of claim 19, wherein the adsorptive filtering structure comprises at least one of activated carbon filtering cotton, activated carbon filtering mesh, and honeycomb ceramic filtering material.

21. 20. The battery of claim 19, wherein the separation unit further includes a plurality of fourth partition plates, the plurality of fourth partition plates are mounted in the second cavity, two adjacent fourth partition plates are spaced apart, second spaces formed between the two adjacent fourth partition plates communicate with each other to form a second flow path, and the adsorption filtering structure is installed in the second flow path.

22. 22. The battery of claim 21, wherein a plurality of the second spaces are serially connected to one another.

23. The battery according to claim 18 , wherein a plurality of the separation units are provided, and the plurality of separation units are in communication with each other in sequence.

24. 16. The battery according to claim 1, wherein an exhaust hole is provided in the case, 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. 25. A power consuming device comprising a battery according to any one of claims 1 to 24.

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