Battery device, electric equipment and energy storage equipment

Abstract

The utility model provides a battery device, electric equipment and energy storage equipment, and belongs to the technical field of batteries, the battery device comprises a battery monomer and a heat exchange plate, the heat exchange plate is in contact with the battery monomer, and the heat exchange plate is internally provided with a heat exchange flow channel allowing liquid to flow; wherein the pipe wall, defining the heat exchange flow channel, of the heat exchange plate is provided with a structural weak area, and the structural weak area is configured to be broken through by liquid and guide the liquid to be jetted to the battery monomer so as to cool the battery monomer when the pressure in the heat exchange flow channel is greater than or equal to a preset pressure threshold value. The structure weak area is arranged on the pipe wall to replace a spraying pipeline, so that the number of parts can be reduced, the structure of the battery device is simpler, and meanwhile, the space utilization rate of the battery device is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery device, electrical equipment, and energy storage device. Background Technology

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] During the use of a battery device, individual battery cells may experience thermal runaway. In order to minimize the damage caused by thermal runaway, a spray pipe is usually laid on top of the individual battery cells. The cooling liquid in the spray pipe is used to spray and cool the thermally runaway individual battery cells. However, laying this spray pipe increases the difficulty of internal layout of the battery device, and the spray pipe also occupies space, reducing the space utilization rate inside the battery device. Utility Model Content

[0004] This application aims to at least address one of the technical problems existing in the background art. Therefore, one objective of this application is to provide a battery device, electrical appliance, and energy storage device to optimize the battery device structure and improve the space utilization rate of the battery device.

[0005] An embodiment of the first aspect of this application provides a battery device, which includes a battery cell and a heat exchange plate. The heat exchange plate is in contact with the battery cell and has a heat exchange channel inside that allows liquid to flow. The heat exchange plate defines a structurally weak area in the wall of the heat exchange channel. The structurally weak area is configured such that when the pressure in the heat exchange channel is greater than or equal to a preset pressure threshold, it can be broken by liquid and the liquid can be directed toward the battery cell to cool the battery cell.

[0006] In the technical solution of this application embodiment, by directly setting a structurally weak area on the heat exchange channel of the heat exchange plate, the pressure of the liquid in the heat exchange channel is increased to break through the structurally weak area to cool down the battery cell. There is no need to arrange additional spray pipes, which reduces the number of internal components of the battery device, reduces the probability of interference during assembly of internal components of the battery device, improves the convenience of battery device assembly, and saves space inside the battery device, thereby reducing the space occupied by the battery device and improving the space utilization rate of the battery device.

[0007] In some embodiments, the battery cell includes a pressure relief mechanism, and the structurally weak area is configured to guide the liquid towards the pressure relief mechanism after it is breached by liquid. By optimizing the location of the structurally weak area, the liquid is guided to directly hit the pressure relief mechanism after breaching the weak area. This effectively improves the cooling effect of the battery cell after thermal runaway.

[0008] In some embodiments, there are multiple battery cells arranged along a first direction with their first sides facing each other, and a heat exchange plate sandwiched between two adjacent battery cells. Structurally weak areas are respectively located on two surfaces of the heat exchange plate facing the battery cells, so that liquid, after being ejected, is directed towards the corresponding battery cell. The first side is the side with the largest area of ​​the battery cell, and the first direction is perpendicular to the first side. By sandwiching the heat exchange plate between two adjacent battery cells and positioning the structurally weak areas of the heat exchange plate facing the surfaces of the two adjacent battery cells, the same heat exchange plate can cool the battery cells on both sides, improving the cooling efficiency of the heat exchange plate.

[0009] In some embodiments, multiple battery cells are arranged side-by-side along a second direction; the surface of the heat exchange plate facing the battery cells is provided with multiple structurally weak areas along the second direction, and each battery cell corresponds to at least one structurally weak area. By contacting the heat exchange plate with the multiple battery cells along the second direction, and with each battery cell corresponding to at least one structurally weak area, the same heat exchange plate can cool down multiple battery cells on one side. At the same time, the heat exchange plate is sandwiched between adjacent battery cells on both sides along a first direction, enabling the same heat exchange plate to cool down multiple battery cells on both sides, further improving the cooling efficiency of the heat exchange plate.

[0010] In some embodiments, the thickness of at least a portion of the structurally weak area is less than the thickness of the heat exchange plate adjacent to the structurally weak area. By directly thinning the tube wall, the process is simple, easy to operate, shortens processing time, improves production efficiency, and reduces production costs.

[0011] In some embodiments, the structurally weak area includes at least one through-hole and a plugging element removably sealed to the through-hole. The plugging element is configured to be pushed out by the liquid in the heat exchange channel when the pressure in the heat exchange channel is greater than or equal to a preset pressure threshold. By directly setting the through-hole on the pipe wall, the process is simple and easy to operate; at the same time, plugging elements with different load-bearing capacities can be installed according to actual needs to meet the requirements of different load-bearing pressures in the heat exchange channel, thereby improving the adaptability of the heat exchange plate to different application scenarios.

[0012] In some embodiments, the battery device further includes a liquid supply pump, which is connected to a heat exchange channel within the heat exchange plate via a liquid supply line, for pumping liquid into the heat exchange channel. By providing the liquid supply pump, pressurized liquid is pumped into the heat exchange channel, increasing the liquid flow rate and thus enhancing the heat exchange efficiency of the heat exchange plate.

[0013] In some embodiments, the liquid supply pump is configured to adjust the pressure within the heat exchange channel by adjusting its own liquid supply pressure. By configuring the liquid supply pump as a device capable of adjusting its own liquid supply pressure, the heat exchange requirements of the battery cells under normal operating conditions, as well as the spray cooling requirements of the battery cells under thermal runaway or impending thermal runaway conditions, can be met.

[0014] In some embodiments, the liquid supply pump includes a first liquid supply pump and a second liquid supply pump for pumping liquid into the heat exchange channel, respectively; wherein the maximum liquid supply pressure of at least one of the second liquid supply pump and the first liquid supply pump is greater than or equal to a preset pressure threshold. By setting a first liquid supply pump and a second liquid supply pump with different liquid supply pressures, different liquid supply pumps can be selected for different operating states of the battery cells, and different liquid supply strategies can be adopted to reduce the potential damage caused by the battery cells. At the same time, the different liquid supply pumps have a backup function for each other, improving the reliability of the liquid supply.

[0015] In some embodiments, the first liquid supply pump and the second liquid supply pump pump different liquids. By setting the first liquid supply pump and the second liquid supply pump with different liquid supply pressures and using different liquid supply pumps to pump different liquids, it is possible to effectively handle the different operating states of the battery cells, meet the needs of different operating states, and reduce the potential damage caused by the battery cells.

[0016] In some embodiments, the battery device further includes a sensor and a controller. The sensor is connected to the individual battery cells and is used to collect state parameters of the battery cells, including one or more of the cell's current, voltage, and temperature. The controller is connected to both the sensor and the liquid supply pump, and is configured to control the liquid supply pressure of the liquid supply pump based on the state parameters. By setting up the sensor and controller, and using the sensor to collect the state parameters of the battery cells in real time, and adopting corresponding liquid supply strategies based on the state parameters of the battery cells, it is possible to prevent and handle thermal runaway of the battery cells in a timely manner before it occurs, thereby minimizing the damage caused by thermal runaway of the battery cells.

[0017] In some embodiments, the heat exchange plate further includes an inlet and an outlet respectively connected to the heat exchange channel, and a fluid control valve disposed at the inlet and / or outlet, the fluid control valve being signal-connected to a controller. By providing a fluid control valve at the inlet or outlet connected to the heat exchange channel, or by providing fluid control valves at both the inlet and outlet, either approach allows for flexible control of the connection and disconnection of the heat exchange channel. Furthermore, by cooperating with a liquid supply pump to adjust the liquid flow pressure within the heat exchange channel, this helps improve the efficiency of spray cooling for thermally runaway battery cells.

[0018] An embodiment of the second aspect of this application provides an electrical device that includes the battery device described in the above embodiments, the battery device being used to provide electrical energy.

[0019] An embodiment of the third aspect of this application provides an energy storage device, which includes the battery device in the above embodiments, and the energy storage device is used to store electrical energy.

[0020] The above description is merely an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0021] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0022] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0023] Figure 2 This is an exploded view of the battery device provided in some embodiments of this application;

[0024] Figure 3 This is an exploded structural diagram of a battery cell provided in some embodiments of this application;

[0025] Figure 4 This is a schematic diagram of the structure of a battery device provided in some embodiments of this application;

[0026] Figure 5 This application provides a schematic diagram of the battery cell arrangement for some embodiments;

[0027] Figure 6 Another schematic diagram of battery cell arrangement is provided for some embodiments of this application;

[0028] Figure 7 A structural schematic diagram of a structurally weak region is provided for some embodiments of this application;

[0029] Figure 8 This application provides a schematic diagram of another structurally weak region.

[0030] Explanation of reference numerals in the attached figures:

[0031] 10. Vehicle; 100. Battery assembly; 200. Controller; 210. First controller; 220. Second controller; 300. Motor; 110. Battery housing; 111. First part; 112. Second part; 120. Battery cell; 121. End cap; 1211. Electrode terminal; 122. Housing; 1221. First side; 1222. Second side; 123. Electrode assembly; 1231. Tab; 12 4. Pressure relief mechanism; 130. Heat exchange plate; 131. Heat exchange channel; 1311. Pipe wall; 1312. Structural weak area; 1313. Through hole; 1314. Sealing component; 132. Inlet; 133. Outlet; 134. Fluid control valve; 140. Liquid supply pump; 141. First liquid supply pump; 142. Second liquid supply pump; 150. Liquid supply pipeline; 151. Main inlet pipeline; 152. Main outlet pipeline; 160. Sensor. Detailed Implementation

[0032] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0034] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0035] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0036] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0037] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0038] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0039] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" 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. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0040] 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 in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery applications, market demand is also constantly increasing.

[0041] The battery device includes individual battery cells and a battery housing. The battery housing is used to house the individual battery cells to prevent external moisture, dust, chemicals, etc., from corroding and damaging the individual battery cells and other internal components inside the battery housing, thereby improving the service life and stability of the battery device.

[0042] During operation, the internal chemical reactions of a battery cell release heat, causing the cell temperature to rise. If the heat is not dissipated in time, the cell may overheat, affecting its lifespan and reducing its performance. Therefore, the battery device also includes a heat exchange plate, which contacts the battery cell and absorbs and removes the heat generated during operation through the circulation of internal cooling liquid.

[0043] During operation, battery cells may overheat due to insufficient heat dissipation, battery cell failure, short circuit, or other reasons, and may even experience thermal runaway, causing fire hazards.

[0044] To address the aforementioned issues, some embodiments incorporate additional spray pipes inside the battery housing. In the event of thermal runaway in a single battery cell, coolant is sprayed through these pipes to cool the cell and minimize the probability of a fire caused by thermal runaway. However, this additional spray pipe system increases the number of components inside the battery housing. The structural layout must avoid interference between these components, increasing the complexity of the internal layout and hindering battery assembly. Furthermore, the spray pipes occupy internal space, potentially reducing the space available for individual battery cells and lowering the overall space utilization of the battery assembly.

[0045] To address the aforementioned issues, this application provides a battery device comprising a battery cell and a heat exchange plate. The heat exchange plate contacts the battery cell and has internal heat exchange channels that allow liquid flow. The heat exchange plate defines a structurally weak area in the wall of the heat exchange channels. This weak area is configured such that when the pressure within the heat exchange channels exceeds or equals a preset pressure threshold, liquid can breach it and direct the liquid towards the battery cell to cool it. By increasing the liquid pressure within the heat exchange channels, the liquid breaches the structurally weak area to cool the battery cell. This eliminates the need for additional spray pipes, reduces the number of internal components, improves assembly convenience, and saves internal space, thereby reducing the space occupied by the battery device and improving its space utilization.

[0046] The battery device disclosed in this application can be used, but is not limited to, in electrical equipment such as vehicles, ships, or aircraft. The power system of such electrical equipment can be constructed using the battery device disclosed in this application, thereby improving the overall space utilization of the electrical equipment.

[0047] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0048] For ease of explanation, the following embodiments will be described using a vehicle 10 as an example of an electrical device according to an embodiment of this application.

[0049] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle provided in some embodiments of this application. The vehicle 10 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery device 100 is disposed inside the vehicle 10, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 10. The battery device 100 can be used to power the vehicle 10; for example, the battery device 100 can serve as the operating power source for the vehicle 10. The vehicle 10 may also include a controller 200 and a motor 300. The controller 200 includes a first controller 210, which controls the battery device 100 to supply power to the motor 300, for example, to meet the power requirements of the vehicle 10 during starting, navigation, and driving.

[0050] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 10, but also as the driving power source for the vehicle 10, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 10.

[0051] Please refer to Figure 2 , Figure 2This is an exploded structural diagram of a battery device provided in some embodiments of this application. The battery device 100 includes a battery housing 110 and a battery cell 120, with the battery cell 120 housed within the battery housing 110. The battery housing 110 provides a accommodating space for the battery cell 120, and can employ various structures. In some embodiments, the battery housing 110 may include a first portion 111 and a second portion 112, which overlap each other, collectively defining a accommodating space for the battery cell 120. The second portion 112 may be a hollow structure with one open end, and the first portion 111 may be a plate-like structure, covering the open side of the second portion 112 so that the first portion 111 and the second portion 112 jointly define the accommodating space; alternatively, the first portion 111 and the second portion 112 may both be hollow structures with one open side, with the open side of the first portion 111 covering the open side of the second portion 112. Of course, the battery box 110 formed by the first part 111 and the second part 112 can be of various shapes, such as cylinder, cuboid, etc.

[0052] In the battery device 100, there can be multiple battery cells 120. These multiple battery cells 120 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 120 are connected in both series and parallel. Multiple battery cells 120 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 120 is housed within the battery casing 110. Alternatively, the battery device 100 can also consist of multiple battery cells 120 first connected in series, parallel, or in a mixed configuration to form a battery module, and then multiple battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is also housed within the battery casing 110. The battery device 100 may also include other structures; for example, the battery device 100 may also include a busbar component for realizing the electrical connection between the multiple battery cells 120.

[0053] Each battery cell 120 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 120 can be cylindrical, flat, cuboid, or other shapes.

[0054] Please refer to Figure 3 , Figure 3 This is an exploded structural diagram of a battery cell provided in some embodiments of this application. Battery cell 120 refers to the smallest unit that makes up a battery. Figure 3 The battery cell 120 includes an end cap 121, a housing 122, an electrode assembly 123, and other functional components.

[0055] End cap 121 refers to a component that covers the opening of housing 122 to isolate the internal environment of battery cell 120 from the external environment. The shape of end cap 121 can be adapted to the shape of housing 122 to fit it. Optionally, end cap 121 can be made of a material with certain hardness and strength (such as aluminum alloy), so that end cap 121 is not easily deformed under pressure or impact, allowing battery cell 120 to have higher structural strength. Functional components such as electrode terminals 1211 can be provided on end cap 121. Electrode terminals 1211 can be used for electrical connection with electrode assembly 123 for outputting or inputting electrical energy into battery cell 120. In some embodiments, end cap 121 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of battery cell 120 reaches a threshold. The material of end cap 121 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating element may be provided on the inner side of the end cap 121. The insulating element can be used to isolate the electrical connection components within the housing 122 from the end cap 121 to reduce the risk of short circuits. For example, the insulating element may be made of plastic, rubber, etc.

[0056] The housing 122 is a component used to cooperate with the end cap 121 to form the internal environment of the battery cell 120. This internal environment can accommodate the electrode assembly 123, electrolyte, and other components. The housing 122 and the end cap 121 can be independent components. An opening can be provided on the housing 122, and the end cap 121 can be used to close the opening to form the internal environment of the battery cell 120. Alternatively, the end cap 121 and the housing 122 can be integrated. Specifically, the end cap 121 and the housing 122 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 122, the end cap 121 closes the housing 122. The housing 122 can be of various shapes and sizes, such as cuboid, cylindrical, or hexagonal prism. Specifically, the shape of the housing 122 can be determined according to the specific shape and size of the electrode assembly 123. The housing 122 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, or plastic.

[0057] Electrode assembly 123 is the component in the battery cell 120 where electrochemical reactions occur. The housing 122 may contain one or more electrode assemblies 123. The electrode assembly 123 is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly, while the portions of the positive and negative electrode sheets without active material each constitute a tab 1231. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery, the positive and negative active materials react with the electrolyte, and the tabs 1231 connect to the electrode terminals to form a current loop.

[0058] This application provides a battery device, such as... Figure 4 and Figure 5 As shown, Figure 4 This is a schematic diagram of the structure of a battery device provided in some embodiments of this application; Figure 5 This application provides a schematic diagram of the battery cell arrangement for some embodiments.

[0059] The battery device 100 includes a battery cell 120 and a heat exchange plate 130. The heat exchange plate 130 is in contact with the battery cell 120. The heat exchange plate 130 has a heat exchange channel 131 that allows liquid to flow. The wall 1311 of the heat exchange channel 131 defined by the heat exchange plate 130 is provided with a structurally weak area 1312. The structurally weak area 1312 is configured to be able to be broken by liquid when the pressure in the heat exchange channel 131 is greater than or equal to a preset pressure threshold, and to guide the liquid to be shot toward the battery cell 120 to cool the battery cell 120.

[0060] The heat exchange plate 130 is a structure for heat exchange between the battery cell 120. The heat exchange plate 130 has a heat exchange channel 131 inside. The flow structure of the heat exchange channel 131 can be, for example, a straight structure, a curved structure, etc. The specific structure is not limited in this embodiment.

[0061] The heat exchange plate 130 contacts the battery cell 120, including at the top, sides, and bottom of the battery cell 120. Heat exchange between the heat exchange plate 130 and the battery cell 120 is achieved through the flow of liquid within the heat exchange plate 130. This heat exchange includes auxiliary cooling and heating of the battery cell 120 by the heat exchange plate 130.

[0062] In some embodiments, after the battery cell 120 has been running for a period of time, the temperature of the battery cell 120 rises. The heat exchange channel 131 of the heat exchange plate 130 contains cooling liquid. The heat exchange plate 130 contacts the side of the battery cell 120. The cooling liquid flows in the heat exchange channel 131 and exchanges heat with the battery cell 120 to help cool the battery cell 120.

[0063] A structurally weak region 1312 is provided on the tube wall 1311 of the heat exchange channel 131. The structurally weak region 1312 can be understood as the area where the tube wall structure can withstand less pressure than other areas. The location of the structurally weak region 1312 on the tube wall 1311 is, for example, facing the explosion-proof valve of the battery cell 120, or facing the electrode terminals of the battery cell 120. The shape of the structurally weak region 1312 is, for example, circular, elliptical, polygonal, etc. This application embodiment does not limit the specific structure.

[0064] If the liquid pressure in the heat exchange channel 131 is greater than or equal to the pressure that the structurally weak area 1312 can withstand, the liquid can break through the structurally weak area 1312 and cool down the battery cell 120.

[0065] The preset pressure threshold is the maximum pressure that the structurally weak area 1312 can withstand, determined based on the structural strength of the tube wall 1311 within the heat exchange plate 130. When the liquid pressure within the heat exchange channel 131 exceeds this preset pressure threshold, the structurally weak area 1312 will first experience structural failure, causing the internal liquid to overflow. For example, when the heat exchange plate 130 cools and exchanges heat with the battery cell 120, the flow pressure of the liquid within the heat exchange channel 131 is between 0 and 0.7 MPa (megapascals), such as 0.1 MPa, 0.3 MPa, 0.5 MPa, 0.7 MPa, etc. The higher the flow pressure, the faster the liquid flows within the heat exchange channel 131. The tube wall 1311 withstands a pressure of 2 MPa, and the pressure threshold that the structurally weak area 1312 can withstand is between 0.7 and 0.8 MPa, such as 0.7 MPa, 0.8 MPa, etc. In some examples, the preset pressure threshold is set to 0.8 MPa. When the liquid pressure pumped into the heat exchange channel 131 exceeds 0.8 MPa, the liquid breaks through the structural weak area 1312 and shoots towards the battery cell 120 to cool the battery cell 120.

[0066] It should be noted that the liquid in the heat exchange plate 130 can be any feasible liquid heat exchange medium, such as an aqueous solution of ethylene glycol or water. The liquid can come from a liquid container configured within the battery device 100 itself, or it can be provided by an external liquid storage device, such as a liquid container or water tank configured in a vehicle, and supplied to the heat exchange plate 130 through fluid pipelines and connectors, etc. The liquid pressure in the heat exchange channel 131 can be adjusted by setting up relevant power components, such as adjusting the operating pressure of the liquid supply pump 140 or setting up an additional booster pump, etc.

[0067] In some embodiments, the pressure within the heat exchange channel 131 can be actively controlled to control whether liquid is sprayed onto the battery cell 120 for spray cooling, preventing the battery cell 120 from heating up. When spray cooling is required, the pumping pressure of the liquid can be increased to allow the liquid to quickly break through the structurally weak area 1312 to cool the battery cell 120, thereby shortening the cooling reaction time as much as possible and reducing the damage caused by thermal runaway.

[0068] By directly setting a structurally weak area 1312 on the heat exchange channel 131 of the heat exchange plate 130, the pressure of the liquid in the heat exchange channel 131 is increased to break through the structurally weak area 1312 to cool down the battery cell 120. There is no need to arrange additional spray pipes, which reduces the number of internal components of the battery device 100, reduces the probability of interference during the assembly of internal components of the battery device 100, improves the convenience of assembly of the battery device 100, and saves space inside the battery device 100, thereby reducing the space occupied by the battery device 100 and improving the space utilization rate of the battery device 100.

[0069] According to some embodiments of this application, such as Figure 4 As shown, the battery cell 120 includes a pressure relief mechanism 124, and the structurally weak area 1312 is configured to guide the liquid to the pressure relief mechanism 124 after being breached by the liquid.

[0070] The pressure relief mechanism 124 is a device for relieving pressure in the battery cell 120. It opens when the internal pressure of the battery cell 120 reaches a critical value, releasing the gas accumulated inside the battery cell 120. This effectively prevents the battery cell 120 from exploding due to excessive internal pressure, thus reducing the impact on the battery cell 120 and other components. The pressure relief mechanism 124 can be installed in the battery cell 120 at various locations, such as the top, side, or bottom. This application embodiment does not limit the specific structure. The pressure relief mechanism 124 can be an explosion-proof valve installed on the housing of the battery cell 120, or it can be a weak structure on the housing, such as a groove or a thinned area.

[0071] In some implementations, the pressure relief mechanism 124 is fixed to the top of the battery cell 120, and the heat exchange plate 130 is in contact with the side of the battery cell 120. The structurally weak area 1312 on the heat exchange plate 130 faces the pressure relief mechanism 124. When the battery cell 120 malfunctions and releases high-temperature and high-pressure gas from the pressure relief mechanism 124, the liquid breaks through the structurally weak area 1312 and shoots directly at the pressure relief mechanism 124, minimizing the range of high-temperature and high-pressure radiation and enhancing the cooling effect of the battery cell 120.

[0072] By optimizing the location of the structurally weak area 1312, the liquid is guided to break through the structurally weak area 1312 and directly shoot towards the pressure relief mechanism 124. The cooling of the pressure relief mechanism 124 can effectively improve the cooling effect after thermal runaway of the battery cell 120.

[0073] like Figure 6 As shown, Figure 6 Another schematic diagram of battery cell arrangement is provided for some embodiments of this application.

[0074] According to some embodiments of this application, there are multiple battery cells 120, and the multiple battery cells 120 are arranged along a first direction with their first side surfaces 1221 facing each other. A heat exchange plate 130 is sandwiched between two adjacent battery cells 120. Structurally weak areas 1312 are respectively provided on two surfaces of the heat exchange plate 130 facing the battery cells 120, so that the liquid rushes out and is directed toward the corresponding battery cells 120. The first side surface 1221 is the side surface with the largest area of ​​the battery cell 120, and the first direction is perpendicular to the first side surface 1221.

[0075] The battery cell 120 has a cubic structure, including a top, a bottom and a side. The side includes two opposing first side surfaces 1221 and two opposing second side surfaces 1222. It can be understood that the side has four sides, specifically including two first side surfaces 1221 and two second side surfaces 1222, wherein the area of ​​the first side surface 1221 is larger than the area of ​​the second side surface 1222.

[0076] Battery cell 120 along the first direction (e.g.) Figure 6 Arranged in the direction indicated by the arrow, the first direction is perpendicular to the first side 1221. In the first direction, the heat exchange plates 130 are sequentially sandwiched between two adjacent battery cells 120 and respectively contact the first side 1221 of the battery cell 120.

[0077] For example, if the number of battery cells 120 is 5, then the number of heat exchange plates 130 is 4, and multiple heat exchange plates 130 are respectively sandwiched between two adjacent battery cells 120 along the first direction.

[0078] The heat exchange plate 130 is provided with multiple structurally weak areas 1312, and the multiple structurally weak areas 1312 are respectively oriented towards any one of the two adjacent battery cells 120 along the first direction.

[0079] For example, the height of the heat exchange plate 130 exceeds the height of the battery cell 120, and the structural weak areas 1312 of the heat exchange channel 131 are spaced apart in the first direction to form two rows of parallel structural weak areas 1312, which face opposite directions.

[0080] For example, the height of the heat exchange plate 130 is approximately the same as the height of the battery cell 120, and the structural weak areas 1312 of the heat exchange channel 131 are spaced apart in the first direction to form two rows of parallel structural weak areas 1312, both of which are arranged obliquely upward.

[0081] By sandwiching the heat exchange plate 130 between two adjacent battery cells 120 and positioning the structurally weak areas 1312 on the heat exchange plate 130 facing the surfaces of the two adjacent battery cells 120 respectively, the same heat exchange plate 130 can cool and reduce the temperature of the battery cells 120 on both sides, thereby improving the cooling efficiency of the heat exchange plate 130.

[0082] According to some embodiments of this application, such as Figure 5 As shown, multiple battery cells 120 are arranged side by side along the second direction; the surface of the heat exchange plate 130 facing the battery cells 120 is provided with multiple structural weak areas 1312 along the second direction, and each battery cell 120 corresponds to at least one structural weak area 1312.

[0083] Multiple battery cells 120 are arranged side by side along the second direction, that is, the first side 1221 of the multiple battery cells 120 are parallel to each other, and the second side 1222 of the multiple battery cells 120 are arranged opposite each other in sequence. Multiple structural weak areas 1312 are provided on the same heat exchange plate 130 along the second direction, so that each battery cell 120 in the second direction can correspond to at least one structural weak area 1312.

[0084] In some embodiments, three battery cells 120 are arranged sequentially along the second direction, with three battery cells 120 forming a row. Five rows are arranged along the first direction, and heat exchange plates 130 are arranged between adjacent rows. The structurally weak areas 1312 on the heat exchange plates 130 are respectively oriented towards different battery cells 120 on both sides, so as to realize heat exchange and cooling of 15 battery cells 120 by four heat exchange plates 130.

[0085] By having the heat exchange plate 130 contact multiple battery cells 120 along the second direction, and with each battery cell 120 corresponding to at least one structurally weak area 1312, the same heat exchange plate 130 can cool down multiple battery cells 120 on one side. At the same time, the heat exchange plate 130 is sandwiched between adjacent battery cells 120 along the first direction, so that the same heat exchange plate 130 can cool down multiple battery cells 120 on both sides, thereby further improving the cooling efficiency of the heat exchange plate 130.

[0086] like Figure 7 As shown, Figure 7 This application provides a structural schematic diagram of a structurally weak region in some embodiments.

[0087] According to some embodiments of this application, the thickness of at least a portion of the structurally weak region 1312 is less than the thickness of the heat exchange plate 130 adjacent to the structurally weak region 1312.

[0088] The structurally weak zone 1312 is a region where the pipe wall structure can withstand less pressure than that of other regions. The thickness of the structurally weak zone 1312 is less than the thickness of adjacent areas to reduce the pressure borne by the structurally weak zone 1312.

[0089] The structural weak zone 1312 can be a region of reduced thickness of any shape, such as a circle, a polygon, or any other closed shape. In some examples, the structural weak zone 1312 can also be one or more grooves formed on the surface of the pipe wall, with the thickness of the grooves being less than the thickness of other areas.

[0090] For example, the wall thickness of the heat exchange channel 131 is 2 mm, and the wall thickness of the structurally weak area 1312 is 1 mm. Under the same material, the pressure that the structurally weak area 1312 can withstand is less than the pressure that other areas can withstand, and the liquid can break through the structurally weak area 1312 for cooling.

[0091] The heat exchange plate 130 can be manufactured in one step during production to form the tube wall 1311 with the structurally weak area 1312, or the tube wall 1311 of the produced heat exchange plate 130 can be thinned by post-processing.

[0092] By directly performing thin-wall treatment on the pipe wall 1311, the process is simple and easy to operate, which can shorten the processing time, improve production efficiency, and reduce production costs.

[0093] like Figure 8 As shown, Figure 8 This application provides a schematic diagram of another structurally weak region.

[0094] According to some embodiments of this application, the structurally weak area 1312 includes at least one through hole 1313 and a plug 1314 that is removably sealed in the through hole 1313. The plug 1314 is configured to be pushed out by the liquid in the heat exchange channel 131 when the pressure in the heat exchange channel 131 is greater than or equal to a preset pressure threshold.

[0095] The structurally weak zone 1312 is where the pressure that the pipe wall structure in this region can withstand is less than the pressure that the pipe wall structure in other regions can withstand. The structurally weak zone 1312 includes a through hole 1313 and a sealing element 1314. The shape of the through hole 1313 is, for example, circular, elliptical, polygonal, etc. The shape of the sealing element 1314 corresponds to the shape of the through hole 1313, so that the heat exchange channel 131 is sealed after the sealing element 1314 is connected to the through hole 1313.

[0096] The connection method between the through hole 1313 and the sealing component 1314 can be determined according to the material, such as snap-fit, bonding, welding, etc.

[0097] The pressure-bearing capacity of the structurally weak area 1312 includes the structural strength of the sealing component 1314 itself, the connection strength between the sealing component 1314 and the through hole 1313, etc. It can be adjusted according to actual needs.

[0098] In some embodiments, when the heat exchange plate 130 cools and exchanges heat with the battery cell 120, the flow pressure of the liquid in the heat exchange channel 131 is between 0 and 0.7 MPa, and the structural strength of the sealing member 1314 is set to 0.8 MPa. If the pressure of the liquid pumped into the heat exchange channel 131 exceeds 0.8 MPa, the sealing member 1314 is damaged, and the liquid breaks through the sealing member 1314 and shoots towards the battery cell 120, thereby cooling the battery cell 120.

[0099] In some embodiments, when the heat exchange plate 130 cools and exchanges heat with the battery cell 120, the flow pressure of the liquid in the heat exchange channel 131 is between 0 and 0.7 MPa, the connection strength between the plug 1314 and the through hole 1313 can be set to 0.8 MPa, the liquid pressure pumped into the heat exchange channel 131 exceeds 0.8 MPa, the plug 1314 disengages from the through hole 1313, and the liquid is ejected through the through hole 1313 toward the battery cell 120 to cool the battery cell 120.

[0100] By directly setting through holes 1313 on the tube wall 1311, the process is simple and easy to operate; at the same time, sealing parts 1314 with different load-bearing capacities can be installed according to actual needs to meet the different load-bearing pressure requirements in the heat exchange channel 131 and improve the adaptability of the heat exchange plate 130 to different application scenarios.

[0101] According to some embodiments of this application, such as Figure 4 As shown, the battery device 100 also includes a liquid supply pump 140, which is connected to the heat exchange channel 131 in the heat exchange plate 130 via a liquid supply line 150, for pumping liquid to the heat exchange channel 131.

[0102] The liquid supply pump 140 is a device used to transport and pressurize liquids, such as a centrifugal pump, gear pump, etc. The liquid supply pump 140 is connected to the heat exchange channel 131 in the heat exchange plate 130 through the liquid supply line 150, so that the liquid is pumped into the heat exchange channel 131 and can flow in the heat exchange channel 131 to meet the heat exchange requirements.

[0103] In some embodiments, the liquid supply line 150 includes a main inlet line 151 and a main outlet line 152. The inlet 132 of the heat exchange channel 131 of each heat exchange plate 130 is connected to the main inlet line 151, and the outlet 133 of the heat exchange channel 131 of each heat exchange plate 130 is connected to the main outlet line 152. The liquid supply pump 140 is connected to the inlet 132 of the heat exchange channel 131 of each heat exchange plate 130 through the main inlet line 151.

[0104] By setting up a liquid supply pump 140, pressurized liquid is pumped into the heat exchange channel 131, thereby increasing the flow rate of the liquid and enhancing the heat exchange efficiency of the heat exchange plate 130.

[0105] According to some embodiments of this application, the liquid supply pump 140 is configured to adjust the pressure within the heat exchange channel 131 by adjusting its own liquid supply pressure.

[0106] The liquid supply pump 140 can adjust its own liquid supply pressure, and any device that can achieve this function is acceptable.

[0107] In some embodiments, the liquid supply pump 140 is an electric centrifugal pump, and the liquid supply pressure of the electric centrifugal pump is adjusted by adjusting the speed of the electric centrifugal pump. When the battery cell 120 changes from normal heat exchange to the need for spray cooling, the speed of the electric centrifugal pump is increased to increase the pump liquid pressure, so that the liquid can break through the structural weak area 1312 to cool the battery cell 120.

[0108] In some embodiments, the liquid supply pump 140 is a gas-liquid booster pump. By adjusting the input gas pressure, the liquid supply pressure of the gas-liquid booster pump can be adjusted. When the battery cell 120 changes from normal heat exchange to needing spray cooling, the input gas pressure of the gas-liquid booster pump is increased to increase the pump liquid pressure, so that the liquid can break through the structural weak area 1312 to cool the battery cell 120.

[0109] By configuring the liquid supply pump 140 as a device capable of adjusting its own liquid supply pressure, it can meet the heat exchange requirements of the battery cell 120 under normal operating conditions, as well as the spray cooling requirements of the battery cell 120 under thermal runaway or impending thermal runaway conditions.

[0110] According to some embodiments of this application, such as Figure 4As shown, the liquid supply pump 140 includes a first liquid supply pump 141 and a second liquid supply pump 142 for pumping liquid into the heat exchange channel 131; wherein, the maximum liquid supply pressure of at least one of the second liquid supply pump 142 and the first liquid supply pump 141 is greater than or equal to a preset pressure threshold.

[0111] Both the first liquid supply pump 141 and the second liquid supply pump 142 are devices used to transport and pressurize liquids, such as centrifugal pumps, gear pumps, etc. They can be the same type of pump or different types of pumps, and this application does not limit this. The maximum liquid supply pressure of at least one of the first liquid supply pump 141 and the second liquid supply pump 142 is greater than or equal to the liquid pressure that the structurally weak area 1312 can withstand.

[0112] In some embodiments, the liquid pressure that the structurally weak area 1312 can withstand (i.e., the preset pressure threshold) is 0.8 MPa, the internal working pressure of the heat exchange plate 130 during normal operation is 0.6 MPa, the maximum liquid supply pressure of the first liquid supply pump 141 is 0.6 MPa, and the maximum liquid supply pressure of the second liquid supply pump 142 is 2 MPa. During normal heat exchange of the battery cell 120, either the first liquid supply pump 141 or the second liquid supply pump 142 can supply liquid independently to maintain the internal fluid working pressure of the heat exchange plate 130 at 0.6 MPa.

[0113] When the battery cell 120 experiences or is about to experience thermal runaway and requires cooling, the second liquid supply pump 142 with a larger maximum liquid supply pressure can supply liquid for cooling, or the first liquid supply pump 141 and the second liquid supply pump 142 can supply liquid simultaneously, so that the pressure of the liquid in the heat exchange channel is greater than 0.8MPa.

[0114] By setting a first liquid supply pump 141 and a second liquid supply pump 142 with different liquid supply pressures, different liquid supply pumps 140 can be selected for different operating states of the battery cell 120, and different liquid supply strategies can be adopted to reduce the damage that the battery cell 120 may cause. At the same time, the different liquid supply pumps 140 have a backup function for each other, which improves the reliability of liquid supply.

[0115] According to some embodiments of this application, the first liquid supply pump 141 and the second liquid supply pump 142 pump different liquids.

[0116] The first liquid supply pump 141 and the second liquid supply pump 142 pump different liquids, such as water, ethylene glycol aqueous solution, propylene glycol aqueous solution, etc. Ethylene glycol aqueous solution and propylene glycol aqueous solution have lower freezing points than water. As cooling liquids, ethylene glycol aqueous solution and propylene glycol aqueous solution can keep the cooling liquid in a liquid state at a lower temperature. The specific heat capacity of water is greater than that of ethylene glycol aqueous solution and propylene glycol aqueous solution, which means that water can absorb a large amount of heat while its own temperature rises relatively little.

[0117] In some embodiments, when the battery cell 120 is undergoing normal heat exchange, the first liquid supply pump 141 can pump an aqueous ethylene glycol solution for heat exchange; when the battery cell 120 experiences or is about to experience thermal runaway and needs to be cooled down, the second liquid supply pump 142 can pump water for cooling down. The second liquid supply pump 142 can be connected to the vehicle water tank and can provide a large amount of cooling water to enhance the cooling effect.

[0118] By setting a first liquid supply pump 141 and a second liquid supply pump 142 with different liquid supply pressures, and by using different liquid supply pumps 140 to pump different liquids, it is possible to effectively handle the different operating states of the battery cell 120, meet the needs of different operating states, and reduce the potential hazards caused by the battery cell 120.

[0119] According to some embodiments of this application, such as Figure 4 As shown, the battery device 100 also includes a sensor 160 and a controller 200. The sensor 160 is connected to the battery cell 120 and is used to collect the state parameters of the battery cell 120. The state parameters include one or more of the current, voltage and temperature of the battery cell. The controller 200 is connected to the sensor 160 and the liquid supply pump 140 respectively. The controller 200 is configured to control the liquid supply pressure of the liquid supply pump 140 based on the state parameters.

[0120] Sensor 160 is a detection device that can sense the measured information and transform the sensed information into an electrical signal or other required form of information output according to a certain rule, so as to meet the requirements of information transmission, processing, storage, display, recording and control. In this embodiment, sensor 160 is used to collect state parameters that can characterize the battery cell 120, including the battery cell's current, voltage and temperature, etc.

[0121] Sensor 160 is connected to battery cell 120, thereby enabling the acquisition of state parameters of battery cell 120. In some embodiments, sensor 160 may include, but is not limited to, a temperature sensor for detecting temperature, a voltage sensor for detecting voltage, and a current sensor for detecting current. The temperature of battery cell 120 is acquired by the temperature sensor, the voltage of battery cell 120 is acquired by the voltage sensor, and the current of battery cell 120 is acquired by the current sensor.

[0122] The controller 200 also includes a second controller 220, which is connected to both the sensor 160 and the liquid supply pump 140. The status parameters collected by the sensor 160 can be transmitted to the second controller 220 via signal transmission. Based on these status parameters, the second controller 220 sends information to the liquid supply pump 140 to adjust the liquid supply pressure. The signal connection can be wired (transmitting signals via a data cable) or wireless (transmitting signals via a wireless network).

[0123] The second controller 220 can process the state parameters collected by the sensor 160, such as comparing the state parameters with preset state parameters and outputting corresponding operation information according to preset conditions. The second controller 220 can be a vehicle control unit (VCU) or a battery management unit (BMU), etc. It can be understood that the second controller 220 can not only control based on the detected real-time parameters, but also issue corresponding control signals according to the changes in real-time parameters, such as the rate of change of current, the rate of change of voltage, or the rate of temperature rise.

[0124] In some embodiments, before thermal runaway occurs in the battery cell 120, the sensor 160 collects the voltage information of each battery cell 120 and transmits it to the second controller 220. The second controller 220 determines that the voltage information has exceeded the preset voltage threshold. Based on the voltage information, the second controller 220 increases the liquid supply pressure of the liquid supply pump 140. The increased liquid pressure in the heat exchange channel 131 breaks through the structural weak area 1312, cools the battery cell 120, and prevents possible thermal runaway in advance.

[0125] In some embodiments, the battery cell 120 has experienced thermal runaway. The sensor 160 collects the temperature information of each battery cell 120 and transmits it to the second controller 220. The second controller 220 determines that the temperature information has exceeded the preset temperature threshold. Based on the temperature information, the second controller 220 increases the liquid supply pressure of the liquid supply pump 140. The increased liquid pressure in the heat exchange channel 131 breaks through the structural weak area 1312 and cools the battery cell 120.

[0126] By setting up a sensor 160 and a second controller 220, the sensor 160 collects the status parameters of the battery cell 120 in real time. Based on the status parameters of the battery cell 120, a corresponding liquid supply strategy is adopted, which can realize timely prevention and treatment before the battery cell 120 thermal runaway occurs, and minimize the damage caused by the thermal runaway of the battery cell 120.

[0127] According to some embodiments of this application, such as Figure 4As shown, the heat exchange plate 130 also includes an inlet 132 and an outlet 133 that are respectively connected to the heat exchange channel 131, and a fluid control valve 134 disposed in the inlet 132 and / or the outlet 133; the fluid control valve 134 is signal connected to the controller 200.

[0128] The inlet 132 of the heat exchange plate 130 is used for inputting liquid, and the outlet 133 of the heat exchange plate 130 is used for outputting liquid.

[0129] In some embodiments, a fluid control valve 134 may be provided at the inlet 132 of the heat exchange plate 130 to control whether liquid enters the heat exchange plate 130. In this way, when a battery cell 120 experiences thermal runaway, the fluid control valves 134 of other heat exchange plates 130 can be closed, allowing the liquid supplied by the liquid supply pump 140 to flow as much as possible into the heat exchange plate 130 in contact with the battery cell 120, thereby quickly breaking through the structurally weak area 1312 and providing sufficient cooling liquid.

[0130] In some embodiments, a fluid control valve 134 may also be provided at the outlet 133 of the heat exchange plate 130 to control whether liquid leaves the heat exchange plate 130. Closing the fluid control valve 134 at the outlet 133 while maintaining a continuous liquid input can rapidly increase the pressure inside the heat exchange plate 130 and shorten the time required to break through the structurally weak area 1312.

[0131] In some embodiments, the fluid control valve 134 may be simultaneously located at the inlet 132 and outlet 133 of the heat exchange plate 130.

[0132] The fluid control valve 134 can be connected to the second controller 220 via a signal and can be opened or closed based on the instructions of the second controller 220.

[0133] In some implementations, based on the state parameters of the battery cell 120 collected by the sensor 160, when the battery cell 120 experiences or is about to experience thermal runaway and needs to be cooled down, the second controller 220 controls the increase of the liquid supply pressure of the liquid supply pump 140, and at the same time controls the closure of the fluid control valve 134 of the outlet 133 of the heat exchange plate 130, so as to increase the liquid pressure in the heat exchange channel 131, accelerate the speed at which the liquid breaks through the structural weak area 1312, and improve the cooling effect on the battery cell 120.

[0134] By installing a fluid control valve 134 at the inlet 132 or outlet 133 connected to the heat exchange channel 131, or by installing a fluid control valve 134 at both the inlet 132 and outlet 133, either solution can flexibly control the connection and disconnection of the heat exchange channel 131. Furthermore, by cooperating with the liquid supply pump 140 to adjust the liquid flow pressure within the heat exchange channel 131, it is helpful to improve the efficiency of spray cooling for thermally runaway battery cells 120.

[0135] This application provides an electrical device, including the battery device 100 in any of the above embodiments, which is used to provide electrical energy.

[0136] This application provides an energy storage device, including the battery device 100 in any of the above embodiments, which is used to store electrical energy.

[0137] In some implementations, such as Figure 4 As shown, the battery device 100 includes a battery cell 120, a heat exchange plate 130, a liquid supply pump 140, a liquid supply pipeline 150, a sensor 160, and a second controller 220.

[0138] The battery cell 120 has a cubic structure, including a bottom, a top, two opposing first sides 1221, and two opposing second sides 1222, wherein the area of ​​the first side 1221 is larger than the area of ​​the second side 1222. Multiple battery cells 120 are arranged along the first and second directions respectively, forming a matrix arrangement.

[0139] Multiple heat exchange plates 130 are respectively sandwiched between two adjacent battery cells 120 in the first direction and are in contact with the first side surface 1221 of the battery cells 120 on both sides. The heat exchange plate 130 has a heat exchange channel 131 inside. The tube wall 1311 of the heat exchange channel 131 is provided with multiple structural weak areas 1312. The multiple structural weak areas 1312 are arranged along the first direction and the second direction respectively. In the first direction, the multiple structural weak areas 1312 are respectively provided on the two surfaces of the heat exchange plate 130 facing the battery cell 120. In the second direction, each battery cell 120 corresponds to at least one structural weak area 1312.

[0140] The liquid supply pipeline 150 includes a main inlet pipeline 151 and a main outlet pipeline 152. The inlet 132 of each heat exchange plate 130 is connected to the main inlet pipeline 151, and the outlet 133 of each heat exchange plate 130 is connected to the main outlet pipeline 152. Fluid control valves 134 are respectively installed at the inlet 132 and the outlet 133.

[0141] The liquid supply pump 140 includes a first liquid supply pump 141 and a second liquid supply pump 142. The first liquid supply pump 141 and the second liquid supply pump 142 are respectively connected to each heat exchange channel 131 through the main inlet pipeline 151.

[0142] Sensor 160 is connected to battery cell 120 and is used to collect the status parameters of battery cell 120.

[0143] The second controller 220 is connected to the sensor 160, the first liquid supply pump 141, the second liquid supply pump 142 and the fluid control valve 134 respectively. The second controller 220 is used to control the liquid supply pressure of the first liquid supply pump 141 and the second liquid supply pump 142 and the opening or closing of the fluid control valve 134 based on the status parameters.

[0144] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, The battery device comprises: a plurality of battery cells; a plurality of heat exchange plates, each of which is in contact with a battery cell and has a heat exchange channel inside for allowing liquid to flow therethrough; wherein a tube wall of the heat exchange channel of each heat exchange plate is provided with a structural weak area configured to be broken by the liquid and direct the liquid to the battery cell to cool the battery cell when a pressure in the heat exchange channel is greater than or equal to a preset pressure threshold.

2. The battery device according to claim 1, characterized by The battery cell comprises a pressure relief mechanism, and the structural weak area is configured to direct the liquid to the pressure relief mechanism after being broken by the liquid.

3. The battery device of claim 1, wherein The battery cells are arranged in a first direction with first opposite sides, and the heat exchange plates are arranged between adjacent battery cells. The structural weak area is arranged on each of two surfaces of the heat exchange plate facing the battery cell, so that the liquid is directed to the corresponding battery cell after being broken out. The first side is the side with the largest area of the battery cell, and the first direction is perpendicular to the first side.

4. The battery device of claim 3, wherein The battery cells are arranged side by side in a second direction, and the heat exchange plate has a plurality of structural weak areas on a side surface facing the battery cells in the second direction, and each battery cell corresponds to at least one structural weak area.

5. The battery device according to any one of claims 1 to 4, characterized by, The thickness of at least part of the structural weak area is less than the thickness of the heat exchange plate adjacent to the structural weak area.

6. The battery device according to any one of claims 1 to 4, wherein The structural weak area comprises at least one through hole and a blocking member detachably blocked in the through hole, and the blocking member is configured to be pushed out by the liquid in the heat exchange channel when the pressure in the heat exchange channel is greater than or equal to the preset pressure threshold.

7. The battery device according to any one of claims 1 to 4, wherein The battery device further comprises: a liquid supply pump in communication with the heat exchange channel of the heat exchange plate through a liquid supply pipeline, for pumping the liquid into the heat exchange channel.

8. The battery device of claim 7, wherein, The liquid supply pump is configured to adjust the pressure in the heat exchange channel by adjusting the liquid supply pressure of the liquid supply pump.

9. The battery device of claim 7, wherein, The liquid supply pump comprises a first liquid supply pump and a second liquid supply pump for pumping liquid into the heat exchange channel, respectively. The maximum liquid supply pressure of at least one of the second liquid supply pump and the first liquid supply pump is greater than or equal to the preset pressure threshold.

10. The battery device of claim 9, wherein, The liquid pumped by the first liquid supply pump and the second liquid supply pump is different.

11. The battery device of claim 7, wherein, The battery device further comprises: a sensor connected to the battery cell for collecting a state parameter of the battery cell, the state parameter comprising one or more of the current, voltage and temperature of the battery cell; a controller connected to the sensor and the liquid supply pump, respectively, and configured to control the liquid supply pressure of the liquid supply pump based on the state parameter.

12. The battery device of claim 11, wherein, The heat exchange plate further comprises an inlet and an outlet in communication with the heat exchange channel, respectively, and a fluid control valve arranged at the inlet and / or the outlet; The fluid control valve is connected to the controller.

13. An electrical device, characterized by The battery device comprises the battery device according to any one of claims 1-12, and is used for providing electric energy.

14. An energy storage device, characterized by, The battery device as claimed in any one of claims 1 to 12, wherein the energy storage apparatus is configured to store electrical energy.

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