Battery device, power utilization device, energy storage device, energy storage system and charging network

Abstract

The utility model relates to a battery device, a power utilization device, an energy storage device, an energy storage system and a charging network, and the battery device comprises a box body which is provided with an accommodation cavity; the single battery is arranged in the accommodating cavity, and an anti-explosion valve is arranged on the first wall of the single battery; the heat exchange plate is arranged in the containing cavity and located between the first wall and the cavity wall of the containing cavity, and a first pressure relief opening corresponding to the anti-explosion valve is formed in the heat exchange plate; and the isolation plate is arranged between the first wall and the heat exchange plate, at least part of the isolation plate is located in the first pressure relief opening, and a second pressure relief opening corresponding to the anti-explosion valve is formed in the part, located at the first pressure relief opening, of the isolation plate. The first pressure relief opening and the second pressure relief opening are matched with each other, so that smooth spraying of the anti-explosion valve can be achieved, the part, located in the first pressure relief opening, of the isolation plate can block sprayed high-temperature media, and the probability that the high-temperature media are sprayed to a heat exchange plate or other structures in the battery device is reduced; the overall structure of the battery device is protected.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to battery devices, electrical devices, energy storage devices, energy storage systems, and charging networks. Background Technology

[0002] During the cyclic operation of battery cells, heat and gas are generated. Heat exchange structures are needed to regulate the temperature of these cells and maintain it within an appropriate range. Simultaneously, explosion-proof valves are required on the battery cells for pressure relief. During pressure relief, the high-temperature medium ejected from the explosion-proof valves can easily damage the heat exchange structures and other components of the battery device, thus affecting its performance. Utility Model Content

[0003] Therefore, it is necessary to provide a battery device, an electrical device, an energy storage device, an energy storage system, and a charging network to address the problem that the high-temperature medium ejected from the explosion-proof valve during pressure relief can easily damage the heat exchange structure and other structures in the battery device, thereby affecting the performance of the battery device.

[0004] In a first aspect, this application provides a battery device, including a housing, a battery cell, a heat exchange plate, and an isolation plate. The housing has a receiving cavity; the battery cell is disposed in the receiving cavity, and an explosion-proof valve is provided on the first wall of the battery cell; the heat exchange plate is disposed in the receiving cavity and located between the first wall and the cavity wall of the receiving cavity, and a first pressure relief port communicating with the explosion-proof valve is opened on the heat exchange plate; the isolation plate is disposed between the first wall and the heat exchange plate, at least a portion of the isolation plate is located in the first pressure relief port, and the portion located in the first pressure relief port has a second pressure relief port communicating with the explosion-proof valve.

[0005] Through the above structure, the second pressure relief port on the isolation plate cooperates with the first pressure relief port on the heat exchange plate to ensure the smooth discharge of the explosion-proof valve, thereby facilitating the pressure relief of the battery cells. Simultaneously, the portion of the isolation plate located within the first pressure relief port also blocks the ejected high-temperature medium, reducing the probability of the high-temperature medium spraying onto the heat exchange plate or other structures within the battery unit, thus protecting the overall structure of the battery unit.

[0006] In some embodiments, the isolation plate includes a first connecting portion and a first extension portion connected to each other. The first connecting portion is connected between the first wall and the heat exchange plate. The first extension portion extends from the first connecting portion toward a direction close to the first pressure relief port, and a second pressure relief port is formed in the first extension portion. At least a portion of the first extension portion is located inside the first pressure relief port.

[0007] By setting the first connecting part, the isolation plate can be stably set between the battery cell and the heat exchange plate. At the same time, the first extension part extends toward the first pressure relief port, which can block the high-temperature medium when the explosion-proof valve is sprayed, thereby protecting the heat exchange plate and other structures in the battery device.

[0008] In some embodiments, the first extension is bent in a direction away from the explosion-proof valve so that the second pressure relief port is spaced apart from the explosion-proof valve.

[0009] With the above structure, on the one hand, the spaced arrangement between the second pressure relief port and the explosion-proof valve allows the high-temperature medium to be sprayed out of the explosion-proof valve more smoothly, reducing the probability that the isolation plate will obstruct the explosion-proof valve from spraying; on the other hand, the bending and shaping of the first extension can better block and protect the edge of the first pressure relief port on the heat exchange plate, reducing the probability that the high-temperature medium will splash onto the heat exchange plate.

[0010] In some embodiments, the distance between the second pressure relief port and the explosion-proof valve is 1mm to 10mm.

[0011] Based on this, setting the distance between the second pressure relief port and the explosion-proof valve to the above range can better balance the smooth operation of the explosion-proof valve, the protective effect of the isolation plate on the heat exchange plate, and the overall size of the battery device.

[0012] In some embodiments, the distance between the second pressure relief port and the explosion-proof valve is 3mm to 5mm. This allows for a more compact overall structure of the battery device and increases its volumetric energy density, while ensuring smooth valve operation.

[0013] In some embodiments, the separator is made of a high-temperature resistant insulating material. Therefore, the above structure makes the separator more stable, better able to block high-temperature media, and protect the structure of the battery device.

[0014] In some embodiments, the temperature resistance of the isolation plate is 400°C to 1200°C.

[0015] In some embodiments, the isolation plate has a temperature resistance of 500°C to 900°C.

[0016] As a result, the isolation plate has more stable properties, can better block high-temperature media, and successfully achieve its protective function.

[0017] In some embodiments, the isolation plate includes a mica plate or a ceramic composite strip. This structure endows the isolation plate with high temperature resistance, high pressure resistance, and insulation properties, thereby providing better protection.

[0018] In some embodiments, the edge of the first pressure relief port is configured as a rounded chamfered edge; wherein the surface of the heat exchange plate facing the isolation plate is coated with an insulating layer.

[0019] The above structure allows the insulating layer to adhere more evenly to the curved chamfered edge, thereby effectively reducing the probability of tip discharge.

[0020] In some embodiments, the heat exchange plate includes a second connecting portion and a second extension portion connected to each other. The second connecting portion is used to connect with the isolation plate, and a first pressure relief port is opened in the second extension portion. The surfaces of the second connecting portion and the second extension portion facing the isolation plate are coated with an insulating layer. The second extension portion bends and extends toward the side away from the isolation plate to form the edge of the first pressure relief port. And / or, the second extension portion is inclined toward the side away from the isolation plate to form the edge of the first pressure relief port.

[0021] The above structure allows the insulating layer to adhere more evenly to the second extension, effectively reducing the probability of tip discharge and protecting the structure of the battery device.

[0022] Secondly, this application also provides an electrical device, including the battery device described above.

[0023] Thirdly, this application also provides an energy storage device, including the battery device described above.

[0024] Fourthly, this application also provides an energy storage system, including a power conversion device and an energy storage device as described above, wherein the power conversion device is used to electrically connect the power generation device and the energy storage device.

[0025] Fifthly, this application also provides a charging network, including a charging pile and an energy storage device or an energy storage system as described above, wherein the energy storage device is used to provide electrical energy to the charging pile.

[0026] In the aforementioned battery device, power supply device, energy storage device, energy storage system, and charging network, an isolation plate is disposed between the first wall of the battery cell and the heat exchange plate, and can be connected and fixed to the first wall of the battery cell and the heat exchange plate respectively. At the same time, at least a portion of the isolation plate is located within the first pressure relief port, and a second pressure relief port corresponding to the explosion-proof valve is provided on this portion of the isolation plate within the first pressure relief port. Thus, when the explosion-proof valve is opened, the first pressure relief port and the second pressure relief port cooperate to enable the explosion-proof valve to spray smoothly. Furthermore, the portion of the isolation plate located within the first pressure relief port can also block the sprayed high-temperature medium, reducing the probability of the high-temperature medium spraying onto the heat exchange plate or other structures in the battery device, thereby protecting the overall structure of the battery device. Attached Figure Description

[0027] Figure 1This is a schematic diagram of an energy storage system according to one or more embodiments.

[0028] Figure 2 This is a schematic diagram of a charging network according to one or more embodiments.

[0029] Figure 3 This is a schematic diagram of a battery device according to one or more embodiments.

[0030] Figure 4 This is a schematic diagram of the structure of a battery cell, separator, and heat exchange plate in a battery device according to one or more embodiments.

[0031] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle.

[0032] Explanation of reference numerals in the attached drawings: 1000, energy storage device; 2000, power conversion equipment; 3000, power generation equipment; 4000, charging pile; 5000, connector; 100, battery device; 10, housing; 20, battery cell; 30, heat exchange plate; 40, isolation plate; 11, receiving cavity; 21, explosion-proof valve; 31, first pressure relief port; 32, insulation layer; 33, second connecting part; 34, second extension part; 41, second pressure relief port; 42, first connecting part; 43, first extension part. Detailed Implementation

[0033] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0034] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0035] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0039] Currently, judging from market trends, battery applications are becoming increasingly widespread. Batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in other fields. With the continuous expansion of battery applications, market demand is also constantly increasing.

[0040] A battery pack typically includes a housing and individual battery cells housed within the housing. These cells can be one or more, interconnected through series, parallel, or mixed connections, and arranged within the housing. Additionally, other functional components can be housed inside the housing. For example, during cyclic operation, the battery cells generate heat. To regulate the temperature of the battery cells and maintain them at a suitable operating temperature, a heat exchange structure is installed inside the housing. This heat exchange structure exchanges heat with the battery cells, thereby regulating their temperature.

[0041] Furthermore, gas is generated during the cycling process of individual battery cells. Therefore, explosion-proof valves need to be installed on the battery cells to release pressure when the internal gas pressure is too high. When the explosion-proof valve opens, the high-temperature medium inside the battery cell is rapidly ejected from the valve under the action of gas pressure. This not only impacts the heat exchange structure and the housing or other structures, but also causes ablation upon contact with the high-temperature medium, damaging the structure of the battery device.

[0042] Based on the above considerations, to address the problem that the high-temperature medium ejected from the explosion-proof valve during pressure relief can easily damage the heat exchange structure and other structures in the battery device, thereby affecting the performance of the battery device, one or more embodiments of this application provide a battery device in which an isolation plate is disposed between the first wall of the battery cell and the heat exchange plate, and can be connected and fixed to both the first wall of the battery cell and the heat exchange plate respectively. Simultaneously, at least a portion of the isolation plate is located within a first pressure relief port, and this portion of the isolation plate within the first pressure relief port has a second pressure relief port corresponding to the explosion-proof valve. Thus, when the explosion-proof valve is opened, the first and second pressure relief ports cooperate to ensure smooth valve discharge, and the portion of the isolation plate within the first pressure relief port also blocks the ejected high-temperature medium, reducing the probability of the high-temperature medium spraying onto the heat exchange plate or other structures in the battery device, thereby protecting the overall structure of the battery device.

[0043] It should be noted that the battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0044] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells. As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0045] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0046] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0047] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0048] The battery device disclosed in this application can be applied to, but is not limited to, energy storage devices or energy storage systems, and can also be applied to electrical devices such as vehicles, ships or aircraft. The power system of such electrical device can be composed of the battery device disclosed in this application.

[0049] The battery device provided in this application embodiment has different structural forms depending on different application scenarios. For example, in an electrical device, it can be a battery pack or battery module; in an energy storage device or energy storage system, it can be an electrical box.

[0050] When the battery device of this application is applied to an energy storage device or system, the energy storage device typically includes one or more battery clusters to increase the voltage and capacity of the energy storage device. A battery cluster may include multiple battery devices, which are connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0051] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices.

[0052] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0053] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0054] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module.

[0055] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device via piping to regulate the temperature of the individual battery cells.

[0056] As an example, the main control module can serve as the battery management unit for the battery cluster, used to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power, or temperature of the battery cluster. For instance, it can control the charging and discharging current and voltage of the battery cluster. The main control module includes modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

[0057] As an example, the central control module can serve as the battery management unit for an energy storage device, used to monitor and manage the device. The central control module can monitor information such as the energy storage device's current, voltage, power, state of charge, or temperature. For instance, it can control the charging and discharging current and voltage of the energy storage device. As an example, the central control module includes modules such as an Insulation Monitoring Module (IMM), a Master Battery Management Unit (MBMU), an Ethernet (ETH) module, and a fiber optic conversion module.

[0058] As an example, a fire protection system includes control panels, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in energy storage systems.

[0059] As an example, the power distribution unit can be used to distribute power to the power modules of the energy storage device.

[0060] Furthermore, such as Figure 1As shown, in some embodiments, the energy storage system may include one or more energy storage devices 1000 and a power conversion device 2000 (PowerConverter System, or PCS), with the PCS connected between the power generation device 3000 and the energy storage device 1000. The power generation device 3000 generates electrical energy, which can be stored in the energy storage device 1000 via the power conversion device 2000. As an example, the power generation device 3000 may specifically be a solar panel, hydroelectric power generation equipment, thermal power generation equipment, wind power generation equipment, etc. The specific type of the power generation device 3000 is not limited in this application.

[0061] In addition, such as Figure 2 As shown, the energy storage device or system disclosed in this application can be applied in a charging network to provide power to charging piles. The charging network includes a charging pile 4000 and an energy storage device 1000. The charging pile 4000 is electrically connected to the energy storage device 1000, which provides power to the charging pile 4000. The charging pile 4000 is electrically connected to a battery device 100 in the energy storage device 1000 via a cable. The battery device 100 can provide its stored energy to the charging pile 4000. The charging pile 4000 has one or more connectors 5000 for connecting to an electrical device (such as a vehicle) to replenish its power. The definition of the battery device is detailed below.

[0062] The energy storage device 1000 can be located inside the charging pile 4000 (e.g., an integrated energy storage and charging unit) or outside the charging pile 4000.

[0063] See Figure 3 , Figure 4 as well as Figure 5 One embodiment of this application provides a battery device 100, including a housing 10, a battery cell 20, a heat exchange plate 30, and an isolation plate 40. The housing 10 has a receiving cavity 11, in which the battery cell 20 is disposed, and an explosion-proof valve 21 is provided on the first wall of the battery cell 20. The heat exchange plate 30 is disposed in the receiving cavity 11, located between the first wall and the cavity wall of the receiving cavity 11, and a first pressure relief port 31 communicating with the explosion-proof valve 21 is provided on the heat exchange plate 30. The isolation plate 40 is disposed between the first wall and the heat exchange plate 30, at least a portion of the isolation plate 40 is located within the first pressure relief port 31, and the portion located within the first pressure relief port 31 has a second pressure relief port 41 communicating with the explosion-proof valve 21.

[0064] It should be noted that in the battery device 100, there can be multiple battery cells 20. These multiple battery cells 20 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 20 are connected in both series and parallel connections. Multiple battery cells 20 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 20 is housed within the housing 10. Alternatively, the battery device 100 can also consist of multiple battery cells 20 first connected in series, parallel, or in a mixed configuration to form a battery module, and then these battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within the housing 10. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 20.

[0065] The housing 10 refers to a structure with an internal cavity 11, providing space and protection for the battery cells 20 and other functional components. The housing 10 may include a housing body and a cover. The housing body includes a bottom plate and side plates, with the side plates surrounding the outer periphery of the bottom plate and forming an opening on one side of the housing body. The cover seals the opening of the housing body, together with the housing body, forming the cavity 11.

[0066] The battery cell 20 may include one or more, and the battery cells 20 are arranged in an array within the receiving cavity 11. Each battery cell 20 is provided with an explosion-proof valve 21 on its first wall. When the battery cell 20 experiences thermal runaway, the explosion-proof valve 21 can be opened by the internal air pressure of the battery cell 20 to relieve pressure.

[0067] Specifically, the battery cell 20 typically includes a housing and a top cover. The housing includes a bottom plate and side plates surrounding the bottom plate. The top cover is disposed opposite to the bottom plate to seal the opening of the housing. Electrode assemblies can be disposed inside the housing and top cover, and the housing and top cover protect the electrode assemblies.

[0068] Furthermore, the first wall of the battery cell 20 can be a top cover, or it can be the bottom plate or side plate of the casing. That is, the explosion-proof valve 21 can be installed on the top cover of the battery cell 20, or it can be installed on the bottom plate or side plate of the battery cell 20. For ease of understanding, the following description will take the example of the explosion-proof valve 21 being installed on the bottom plate of the battery cell 20.

[0069] The heat exchange plate 30 refers to a structure that can contact the first wall of the battery cell 20 to exchange heat with the battery cell 20. The heat exchange plate 30 can be, but is not limited to, a water-cooled plate. The water-cooled plate is located at the bottom of the housing 10, and then each battery cell 20 is placed on the water-cooled plate, so that the water-cooled plate contacts the bottom plate of the battery cell 20.

[0070] The water-cooled plate has heat exchange channels inside, which are filled with heat exchange medium, such as coolant. When the coolant flows in the heat exchange channels, it can carry away the heat of the battery cell 20, thereby cooling the battery cell 20.

[0071] Furthermore, a first pressure relief port 31 is provided on the water-cooled plate, and the first pressure relief port 31 is configured one-to-one with the explosion-proof valve 21. Thus, when the explosion-proof valve 21 is opened, the high-temperature medium inside the explosion-proof valve 21 can be smoothly ejected through the first pressure relief port 31, thereby achieving smooth pressure relief.

[0072] However, when the explosion-proof valve 21 is depressurized, the high-temperature medium can easily splash onto the water-cooled plate, damaging its structure. In addition, the splashing of the high-temperature medium may also cause sparks, which can easily splash onto the water-cooled plate, the housing 10, or the surrounding battery cells 20. This can not only damage the structure of the battery device 100 but also cause problems such as tip discharge.

[0073] Based on this, an isolation plate 40 is provided between the first wall and the heat exchange plate 30. The isolation plate 40 is designed to block and isolate the high-temperature medium ejected from the explosion-proof valve 21, so as to protect the heat exchange plate 30 and other structural components in the battery device 100.

[0074] Specifically, the separator 40 is disposed between the bottom plate of the battery cell 20 and the water-cooling plate. The upper surface of the separator 40 is connected and fixed to the bottom plate of the battery cell 20 by adhesive or other means, and the lower surface of the separator 40 is connected and fixed to the water-cooling plate by adhesive or other means, so that the separator 40 can be stably disposed between the battery cell 20 and the water-cooling plate.

[0075] Furthermore, at least a portion of the isolation plate 40 is located within the first pressure relief port 31, that is, the projection of this portion of the isolation plate 40 falls within the first pressure relief port 31. A second pressure relief port 41 is formed on this portion of the isolation plate 40, and the second pressure relief port 41 is located between the explosion-proof valve 21 and the first pressure relief port 31, and the second pressure relief port 41 is correspondingly arranged with the explosion-proof valve 21.

[0076] Therefore, when the high-temperature medium is ejected from the explosion-proof valve 21, the second pressure relief port 41 and the first pressure relief port 31 can jointly provide an ejection channel for the high-temperature medium, allowing it to be ejected smoothly and thus achieving pressure relief. At the same time, it is understandable that the area of ​​the second pressure relief port 41 is smaller than the area of ​​the first pressure relief port 31, enabling the isolation plate 40 to provide a certain degree of obstruction for the high-temperature medium, preventing it from splashing onto the water-cooled plate in all directions.

[0077] Through the above structure, the second pressure relief port 41 on the isolation plate 40 cooperates with the first pressure relief port 31 on the heat exchange plate 30 to ensure the smooth discharge of the explosion-proof valve 21, thereby facilitating the pressure relief of the battery cell 20. Simultaneously, the portion of the isolation plate 40 located within the first pressure relief port 31 also blocks the ejected high-temperature medium, reducing the probability of the high-temperature medium spraying onto the heat exchange plate 30 or other structures within the battery device 100, thus protecting the overall structure of the battery device 100.

[0078] In some embodiments, the isolation plate 40 includes a first connecting portion 42 and a first extension portion 43 connected to each other. The first connecting portion 42 is connected between the first wall and the heat exchange plate 30. The first extension portion 43 extends from the first connecting portion 42 toward a direction close to the first pressure relief port 31, and a second pressure relief port 41 is formed in the first extension portion 43. At least a portion of the first extension portion 43 is located within the first pressure relief port 31.

[0079] Specifically, the first connecting portion 42 is configured as a flat plate structure, and the first connecting portion 42 is located between the first wall and the heat exchange plate 30. That is, the upper surface of the first connecting portion 42 is fitted to the first wall, and the lower surface of the first connecting portion 42 is fitted to the heat exchange plate 30. As a result, the separator plate 40 can be stably disposed between the battery cell 20 and the heat exchange plate 30.

[0080] Furthermore, the first extension 43 extends from the first connecting portion 42 toward the first pressure relief port 31, such that at least a portion of the first extension 43 is located within the first pressure relief port 31, and the second pressure relief port 41 is opened in the first extension 43.

[0081] Therefore, the first extension 43 can block the high-temperature medium and protect the heat exchange plate 30.

[0082] By providing the first connecting part 42, the isolation plate 40 can be stably positioned between the battery cell 20 and the heat exchange plate 30. At the same time, the first extension part 43 extends toward the first pressure relief port 31, which can block the high-temperature medium when the explosion-proof valve 21 is released, thereby protecting the heat exchange plate 30 and other structures in the battery device 100.

[0083] In some embodiments, the first extension 43 is bent in a direction away from the explosion-proof valve 21 so that the second pressure relief port 41 is spaced apart from the explosion-proof valve 21.

[0084] Specifically, the bending of the first extension 43 toward the direction away from the explosion-proof valve 21 means that when the isolation plate 40 is disposed between the bottom plate of the battery cell 20 and the water-cooling plate, the first extension 43 extends toward the first pressure relief port 31 while bending downward, so that the first extension 43 can gradually move away from the bottom plate of the battery cell 20, and the second pressure relief port 41 is spaced apart from the explosion-proof valve 21.

[0085] With the above structure, on the one hand, the second pressure relief port 41 is spaced apart from the explosion-proof valve 21, which allows the high-temperature medium to be sprayed out of the explosion-proof valve 21 more smoothly, reducing the probability that the isolation plate 40 will obstruct the spray valve of the explosion-proof valve 21; on the other hand, the first extension 43 is bent and formed, which can better block and protect the edge of the first pressure relief port 31 on the heat exchange plate 30, reducing the probability that the high-temperature medium will splash onto the heat exchange plate 30.

[0086] In some embodiments, the distance H between the second pressure relief port 41 and the explosion-proof valve 21 is 1mm to 10mm.

[0087] Specifically, the distance between the second pressure relief port 41 and the explosion-proof valve 21 not only affects the smooth operation of the explosion-proof valve 21, but also affects the space occupied by the isolation plate 40 in the height direction, thereby affecting the overall volume of the battery device 100.

[0088] Furthermore, the distance between the second pressure relief port 41 and the explosion-proof valve 21 also affects the creepage distance between the heat exchange plate 30 and the explosion-proof valve 21. Therefore, by setting the distance between the second pressure relief port 41 and the explosion-proof valve 21 to the range mentioned above, the creepage distance between the heat exchange plate 30 and the explosion-proof valve 21 through the second pressure relief port 41 can reach 20mm.

[0089] Based on this, setting the distance between the second pressure relief port 41 and the explosion-proof valve 21 to the above range can better balance the smooth discharge of the explosion-proof valve 21, the protective effect of the isolation plate 40 on the heat exchange plate 30, and the overall volume of the battery device 100.

[0090] In some embodiments, the distance H between the second pressure relief port 41 and the explosion-proof valve 21 is 3mm to 5mm.

[0091] As a preferred embodiment, the distance between the second pressure relief port 41 and the explosion-proof valve 21 is set to the range mentioned above. On the basis of ensuring the smooth discharge of the explosion-proof valve 21, the overall structure of the battery device 100 can be made more compact, and the volumetric energy density of the battery device 100 can be improved.

[0092] In some embodiments, the material of the isolation plate 40 is a high-temperature resistant insulating material.

[0093] Specifically, the isolation plate 40 is made of high-temperature resistant insulating material. On the one hand, when the isolation plate 40 blocks the high-temperature medium, the high-temperature resistance of its material helps prevent the medium from burning it, making the structure of the isolation plate 40 more stable and better able to block the high-temperature medium. On the other hand, when the high-temperature medium sparks and the sparks splash onto the isolation plate 40, it effectively prevents the problem of tip discharge.

[0094] Thus, the above structure makes the structure of the isolation plate 40 more stable, and it can better block the high-temperature medium and protect the structure of the battery device 100.

[0095] In some embodiments, the temperature resistance of the isolation plate 40 is 400°C to 1200°C. As a specific embodiment, the temperature resistance of the isolation plate 40 is 500°C to 900°C.

[0096] As a result, the isolation plate 40 has more stable properties, can better block high-temperature media, and successfully achieve its protective function.

[0097] In some embodiments, the isolation plate 40 includes a mica plate or a ceramic composite strip.

[0098] As a specific embodiment, the isolation plate 40 can be set as a mica plate. In order to further improve the high voltage resistance of the mica plate, a layer of PET material can be coated on the surface of the mica plate, so that the mica plate can successfully achieve a high voltage resistance of over 5900V.

[0099] The total thickness of the mica board and PET material can be adjusted according to the specific high pressure resistance range required, which will not be elaborated here.

[0100] As another specific embodiment, the isolation plate 40 can also be set as a ceramic composite strip. When a ceramic composite strip is used, since the material is relatively soft, a substrate layer needs to be set in order to form it smoothly, and then the ceramic composite strip is attached to it and finally formed together.

[0101] Of course, in some other embodiments, the isolation plate 40 can also be made of other materials so that the isolation plate 40 can achieve a high voltage resistance of more than 5900V, which will not be elaborated here.

[0102] Through the above structure, the isolation plate 40 has high temperature resistance, high pressure resistance and insulation properties, thereby enabling it to play a better protective role.

[0103] In some embodiments, the edge of the first pressure relief port 31 is configured as a rounded chamfered edge. The surface of the heat exchange plate 30 facing the isolation plate 40 is coated with an insulating layer 32.

[0104] Specifically, an insulating layer 32 is coated on the surface of the water-cooled plate facing the battery cell 20 and the separator 40. The insulating layer 32 is typically formed by covering it with insulating powder. Therefore, when the edge of the first pressure relief port 31 has a right-angle structure, the insulating powder adheres to a thinner thickness at the right-angle position, or even fails to adhere at all. In this case, the high-temperature medium sprayed from the explosion-proof valve 21 can easily splash to the surrounding area and cause lateral sparking, which can easily lead to tip discharge.

[0105] Based on this, the edge of the first pressure relief port 31 is set as an arc-shaped chamfer structure, that is, the right angle structure is replaced by an arc-shaped chamfer structure, so that the insulating powder can be more evenly attached to the arc-shaped chamfer edge, thereby effectively reducing the probability of tip discharge.

[0106] In some embodiments, the heat exchange plate 30 includes a second connecting portion 33 and a second extension portion 34 connected to each other. The second connecting portion 33 is used to connect to the isolation plate 40, and a first pressure relief port 31 is formed in the second extension portion 34. Both the second connecting portion 33 and the second extension portion 34 are coated with an insulating layer 32 on their surfaces facing the isolation plate 40. The second extension portion 34 extends in a curved manner toward the side opposite to the isolation plate 40 to form the edge of the first pressure relief port 31. And / or, the second extension portion 34 is inclined toward the side opposite to the isolation plate 40 to form the edge of the first pressure relief port 31.

[0107] Specifically, the second connecting part 33 is the main structure of the water-cooled plate, that is, the second connecting part 33 is attached to the bottom surface of the isolation plate 40 or the battery cell 20, and the second connecting part 33 is provided with a heat exchange channel to realize heat exchange of the battery cell 20.

[0108] As a specific embodiment, the second extension 34 can bend and extend toward the side opposite to the isolation plate 40, thereby forming the arc-shaped edge of the first pressure relief port 31. That is, the arc-shaped chamfered edge of the first pressure relief port 31 extends downward a certain distance, so that the insulating layer 32 can cover a larger area and better prevent the high-temperature medium from splashing in all directions.

[0109] As another specific embodiment, the second extension 34 can also be inclined toward the side away from the isolation plate 40, that is, the second extension 34 forms an inclined surface, and the inclined surface is inclined toward the first pressure relief port 31 with a downward slope. In this way, the insulating layer 32 can be more evenly attached to the second extension 34 in the area near the first pressure relief port 31, reducing the probability of tip discharge.

[0110] With the above structure, the insulating layer 32 can be more evenly attached to the second extension 34, which can effectively reduce the probability of tip discharge and protect the structure of the battery device 100.

[0111] Based on the same concept as the battery device 100 described above, this application also provides an electrical device including the battery device 100 as described above.

[0112] According to one or more embodiments, when using this application, the water-cooled plate is first placed at the bottom of the housing 10, and then the isolation plate 40 is placed on the water-cooled plate, and the second pressure relief port 41 on the isolation plate 40 is configured to correspond one-to-one with the first pressure relief port 31 on the water-cooled plate.

[0113] Furthermore, multiple battery cells 20 are arranged inside the housing 10, wherein each battery cell 20 has an explosion-proof valve 21 on its bottom surface, so that the explosion-proof valve 21 is arranged in a one-to-one correspondence with the second pressure relief port 41 and the first pressure relief port 31.

[0114] When a battery cell 20 experiences thermal runaway, the explosion-proof valve 21 opens, and the high-temperature medium in the explosion-proof valve 21 is smoothly ejected through the second pressure relief port 41 and the first pressure relief port 31 to achieve pressure relief. At the same time, the isolation plate 40 can block the high-temperature medium, reducing the splashing of the high-temperature medium onto the water-cooled plate or other parts of the housing 10 or other battery cells 20 in the vicinity.

[0115] In addition, the edge of the first pressure relief port 31 is set as an arc edge and coated with an insulating layer 32, which can not only better block the high temperature medium, but also reduce the probability of tip discharge and protect the battery device 100.

[0116] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0117] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A battery device, characterized by, The battery device comprises: a box body having a receiving cavity; a battery cell arranged in the receiving cavity, the battery cell being provided with an explosion-proof valve on a first wall thereof; a heat exchange plate arranged in the receiving cavity and located between the first wall and a cavity wall of the receiving cavity, the heat exchange plate being provided with a first pressure relief opening communicated with the explosion-proof valve; and a separation plate arranged between the first wall and the heat exchange plate, at least a portion of the separation plate being located in the first pressure relief opening, and a portion of the separation plate located in the first pressure relief opening being provided with a second pressure relief opening communicated with the explosion-proof valve. The separation plate comprises a first connecting portion and a first extending portion connected to each other, the first connecting portion being connected between the first wall and the heat exchange plate, the first extending portion being formed by extending from the first connecting portion towards the first pressure relief opening, and the second pressure relief opening being formed in the first extending portion; 2. The battery device of claim 1, wherein wherein at least a portion of the first extending portion is located in the first pressure relief opening. The first extending portion is curved towards a direction away from the explosion-proof valve, so that the second pressure relief opening is arranged in a spaced manner with the explosion-proof valve.

3. The battery device of claim 2, wherein The spacing distance between the second pressure relief opening and the explosion-proof valve is 1mm-10mm.

4. The battery device of claim 3, wherein The spacing distance between the second pressure relief opening and the explosion-proof valve is 3mm-5mm.

5. The battery device of claim 4, wherein The material of the separation plate is a high-temperature-resistant insulating material.

6. The battery device according to any one of claims 1 to 5, wherein The temperature resistance of the separation plate is 400-1200℃.

7. The battery device of claim 6, wherein The temperature resistance of the separation plate is 500-900℃.

8. The battery device of claim 7, wherein, The separation plate comprises a mica plate or a ceramic composite tape.

9. The battery device of claim 7, wherein, An edge of the first pressure relief opening is configured as an arc-shaped chamfered edge.

10. The battery device of claim 1, wherein The heat exchange plate is coated with an insulating layer on a side surface thereof facing the separation plate. The heat exchange plate comprises a second connecting portion and a second extending portion connected to each other, the second connecting portion being used for connecting with the separation plate, and the first pressure relief opening being formed in the second extending portion; the second connecting portion and the second extending portion are both coated with an insulating layer on a side surface thereof facing the separation plate; 11. The battery device of claim 1, wherein wherein the second extending portion is curved to extend towards a side away from the separation plate to form an edge of the first pressure relief opening; and / or the second extending portion is arranged in an inclined manner towards a side away from the separation plate to form an edge of the first pressure relief opening. The battery device as claimed in any one of claims 1-11.

12. An electrical device, comprising: The battery device as claimed in any one of claims 1-11.

13. An energy storage device, characterized by, The energy storage device as claimed in claim 13 or the energy storage system as claimed in claim 14.

14. An energy storage system characterized by, The charging pile and the energy storage device as claimed in claim 13 or the energy storage system as claimed in claim 14, the energy storage device being used for providing electric energy for the charging pile.

15. A charging network characterized in that, ​

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