Battery device, energy storage device, power utilization device and box body

Abstract

The utility model discloses a battery device, an energy storage device, a power utilization device and a box body, and relates to the technical field of batteries, the battery device comprises a plurality of battery cells, a heat exchange plate and a beam body, the beam body and the plurality of battery cells are arranged on the same side of the heat exchange plate, an end surface is arranged at one end, close to the heat exchange plate, of the beam body, and the end surface comprises a first contact surface and a first non-contact surface; the surface of the heat exchange plate comprises a second contact face and a second non-contact face, the first contact face abuts against the second contact face, the first non-contact face and the second non-contact face are oppositely arranged in a spaced mode to form a heat insulation gap, a flow channel is formed in the heat exchange plate, and at least part of the flow channel of the heat exchange plate is arranged at the position covered by the second non-contact face. The battery device can improve the heat management effect of the heat exchange plate on the battery cell.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery device, an energy storage device, an electric device and a box. BACKGROUND

[0002] New energy battery devices have the characteristics of storing or releasing energy as needed, and are more and more widely used in various electric devices and energy storage devices.

[0003] The battery device is usually provided with battery cells and heat exchange plates, and the heat exchange plates are used to transfer heat to the battery cells or take out the heat of the battery cells, so as to control the temperature of the battery cells and make the battery device maintain better performance in different environmental temperatures. However, the heat exchange plates of the battery device are in direct contact or fixedly connected with part of the beam body, and the heat of the heat exchange plates will be transferred to the beam body, thereby affecting the heat management effect of the heat exchange plates on the battery cells.

[0004] The information disclosed in the above background section is only used to strengthen the understanding of the background of the present application, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. CONTENT OF THE INVENTION

[0005] The purpose of the embodiments of the present application is to provide a battery device, an energy storage device, an electric device and a box, which can reduce the heat transfer from the heat exchange plates to the beam body and improve the heat management effect of the heat exchange plates on the battery cells.

[0006] The embodiments of the first aspect of the present application provide a battery device, comprising: a plurality of battery cells; a heat exchange plate, the inside of the heat exchange plate being provided with flow channels; a beam body, the beam body and the plurality of battery cells being arranged on the same side of the heat exchange plate, one end of the beam body close to the heat exchange plate being provided with an end face, the end face comprising a first contact surface and a first non-contact surface, the surface of the heat exchange plate comprising a second contact surface and a second non-contact surface, the first contact surface abutting against the second contact surface, the first non-contact surface being arranged in opposite and spaced relation with the second non-contact surface, so that a heat insulation gap is formed between the first non-contact surface and the second non-contact surface, and at least part of the flow channels of the heat exchange plate are arranged at positions covered by the second non-contact surface.

[0007] According to the embodiments of the present application, the first contact surface of the beam body and the second contact surface of the heat exchange plate abut to meet the structural strength of the battery device, and the first non-contact surface of the beam body and the second non-contact surface of the heat exchange plate are arranged in opposite spaced relationship to form a heat insulation gap, and at least part of the flow channel of the heat exchange plate is arranged at a position covered by the second non-contact surface, so that the beam body and at least part of the flow channel of the heat exchange plate are separated by the heat insulation gap, thereby reducing the direct contact between the beam body and the heat exchange plate provided with the flow channel, achieving efficient blocking of heat transfer from the heat exchange plate to the beam body, reducing heat loss of the heat exchange plate, improving the heating and cooling rate of the heat exchange plate to the battery cell, making the heat management effect of the heat exchange plate to the battery cell better, and further improving the adaptability of the battery device to different environmental temperatures, so that the battery device can adapt to more extreme external environment and working condition requirements.

[0008] According to some embodiments of the present application, optionally, the first orthographic projection of the flow channel on the end surface is located in the first non-contact surface, and the edge of the first orthographic projection and the edge of the first non-contact surface have a spacing.

[0009] The first orthographic projection of the flow channel on the end surface is located in the first non-contact surface, and the edge of the first orthographic projection and the edge of the first non-contact surface are spaced apart by a certain distance, so that the orthographic projection of the part around the flow channel in the spacing range on the end surface is also located in the first non-contact surface, which can further block the heat transfer between the heat exchange plate and the beam body, thereby further reducing the heat loss of the heat exchange plate and further improving the heating and cooling rate of the heat exchange plate to the battery cell.

[0010] Optionally, the edge of the first orthographic projection of the flow channel on the end surface and the edge of the first non-contact surface are spaced apart by a distance of 2.5mm-3.5mm. For example, the edge of the first orthographic projection of the flow channel on the end surface and the edge of the first non-contact surface are spaced apart by a distance of 3mm.

[0011] The position within the range of 2.5 mm around the flow channel of the heat exchange plate may still gather a large amount of heat due to the close distance to the flow channel, and the position outside the range of 2.5 mm around the flow channel of the heat exchange plate may gather less heat due to the far distance to the flow channel. By setting the distance between the edge of the first non-contact surface and the edge of the first orthographic projection of the flow channel on the end surface to be greater than or equal to 2.5 mm, the flow channel of the heat exchange plate and the position within the range of 2.5 mm around the flow channel can be thermally insulated from the beam body through the heat insulation gap, thereby reducing the heat transfer efficiency of the heat gathered around the flow channel to the beam body, so that the heat gathered around the flow channel can be more used for controlling the temperature of the battery cell, thereby improving the heating or cooling rate of the heat exchange plate to the battery cell. On the other hand, since less heat is gathered outside the range of 3.5 mm around the flow channel of the heat exchange plate, by setting the distance between the edge of the first non-contact surface and the edge of the first orthographic projection of the flow channel on the end surface to be less than or equal to 3.5 mm, the area of the first non-contact surface is not too large, and the area of the heat insulation gap is not too large, so that the structural strength of the beam body and the contact or connection strength between the beam body and the heat exchange plate can be better balanced.

[0012] According to some embodiments of the present application, the flow channel has a distance between the edge of the second orthographic projection on the second non-contact surface and the edge of the second non-contact surface.

[0013] By setting the distance between the edge of the second orthographic projection and the edge of the second non-contact surface, the orthographic projection of the position within the distance range around the flow channel on the second non-contact surface can also be located within the second non-contact surface, which can further block the heat transfer between the heat exchange plate and the beam body, thereby further reducing the heat loss of the heat exchange plate and further improving the heating and cooling rate of the heat exchange plate to the battery cell.

[0014] Optionally, the distance between the edge of the second orthographic projection of the flow channel on the second non-contact surface and the edge of the second non-contact surface is 2.5-3.5 mm. For example, the distance between the edge of the second orthographic projection of the flow channel on the second non-contact surface and the edge of the second non-contact surface is 3 mm.

[0015] By setting the distance between the edge of the second orthographic projection and the edge of the second non-contact surface to be greater than or equal to 2.5 mm, the flow channel of the heat exchange plate and the parts within a radius of 2.5 mm around the flow channel can be thermally insulated from the beam body through the thermal insulation gap, thereby reducing the heat transfer efficiency of the heat accumulated around the flow channel to the beam body, so that the heat accumulated around the flow channel can be more used for controlling the temperature of the battery cell, thereby improving the heating or cooling rate of the heat exchange plate to the battery cell. On the other hand, by setting the distance between the edge of the second orthographic projection and the edge of the second non-contact surface to be less than or equal to 3.5 mm, the void area formed between the heat exchange plate and the beam body through the thermal insulation gap can be limited, thereby improving the structural strength of the heat exchange plate.

[0016] According to some embodiments of the present application, optionally, the shape of the flow channel corresponds to the shape of the first non-contact surface.

[0017] In this way, the thermal insulation effect between the flow channel and the beam body can be met, while the area waste of the first and second non-contact surfaces can be reduced, so that a relatively larger first contact surface can be arranged on the end surface to abut against the second contact surface of the heat exchange plate, thereby improving the structural strength of the beam body itself and the contact or connection strength between the beam body and the heat exchange plate, and the structural strength performance of the battery device is also met.

[0018] According to some embodiments of the present application, optionally, at least a part of the thermal insulation gap is a hollow structure.

[0019] In this way, the hollow structure of the thermal insulation gap can accommodate gas. Optionally, the gas accommodated in the hollow structure of the thermal insulation gap can be air, and of course, other gases can also be used. The hollow structure can form a layer of thermal insulation gas between the beam body and the heat exchange plate, and since the thermal conductivity of air and other gases is low, the heat insulation effect of the flow channel can be improved, and the heat transfer between the heat exchange plate and the beam body can be further reduced, thereby further reducing the heat loss of the heat exchange plate and further improving the heating and cooling rate of the heat exchange plate to the battery cell.

[0020] According to some embodiments of the present application, optionally, the first non-contact surface forms a groove recessed with respect to the first contact surface, the groove has an opening, and the opening of the groove is arranged towards the heat exchange plate; the second non-contact surface is flush with the second contact surface; or the second non-contact surface is recessed with respect to the second contact surface; or the second non-contact surface is protruded with respect to the second contact surface, and the protrusion height of the second non-contact surface with respect to the second contact surface is less than the depth of the groove; or part of the flow channel is arranged at intervals, a hollow structure is formed at the interval position between adjacent flow channels, and the second non-contact surface comprises the hollow structure.

[0021] The first non-contact surface is arranged to be recessed relative to the first contact surface to form a groove relative to the first contact surface by the first non-contact surface, and by arranging the opening of the groove to face the heat exchange plate, the first non-contact surface can form a heat insulation gap with the second non-contact surface regardless of whether the second non-contact surface is flush with the second contact surface, recessed relative to the second contact surface, or protruded relative to the second contact surface and the protrusion height of the second non-contact surface relative to the second contact surface is less than the depth of the groove, so that the beam body can be adapted to a more diverse structure of the heat exchange plate and has better compatibility with the structure of the heat exchange plate.

[0022] For the case that the flow channels are arranged at intervals and a hollow structure is formed at the interval position between adjacent flow channels, by arranging at least a part of the second non-contact surface as a hollow structure, the heat conduction contact area between the heat exchange plate and the beam body can be naturally reduced, and the flow channels can be better insulated or cooled.

[0023] According to some embodiments of the present application, the battery device further comprises a blocking member, a part of the heat insulation gap extends to the edge of the end face, and the heat insulation gap is provided with a side opening at one end close to the edge of the end face, and the blocking member is arranged in the heat insulation gap and blocks the side opening.

[0024] By arranging the blocking member to block the side opening of the heat insulation gap, the risk of aluminum scraps and the like entering the side of the beam body where the battery cell is located through the heat insulation gap and the side opening between the beam body and the heat exchange plate can be reduced, thereby reducing the risk of the heat exchange plate at the battery cell being scratched by the aluminum scraps and the like, and the risk of insulation failure or thermal runaway caused by the aluminum scraps and the like entering the position of the battery cell.

[0025] According to some embodiments of the present application, the battery device further comprises a frame, the heat exchange plate is arranged on one side of the frame, and the frame and the heat exchange plate jointly enclose a containing space, and the beam body and the battery cell are located in the containing space.

[0026] By arranging the beam body and the battery cell to be located in the containing space, the heat transfer between the beam body and the flow channels of the heat exchange plate inside the frame is reduced by using the heat insulation gap between the beam body and the flow channels of the heat exchange plate, thereby achieving a dual consideration of the structural strength and thermal management performance of the battery device.

[0027] According to some embodiments of the present application, the frame comprises a first side edge, and a liquid inlet and outlet pipe is arranged to pass through the first side edge; the beam body comprises a first limiting beam arranged between the first side edge and the battery cell; and the flow channel comprises a first sub-flow channel in communication with the liquid inlet and outlet pipe, at least a part of the first sub-flow channel is arranged in a part of the heat exchange plate corresponding to the first limiting beam, and the first sub-flow channel is arranged at a position covered by the second non-contact surface.

[0028] The flow channel corresponds to a first sub-flow channel provided by the first limiting beam. Due to the position close to the liquid inlet and outlet pipe, the flow channel is generally a part with a larger flow area. For example, the flow channel at the position corresponding to the battery cell in combination with the heat exchange plate is described as a second sub-flow channel. In the liquid inlet process of the flow channel: after the heat carrier enters the first sub-flow channel from the liquid inlet and outlet pipe, the heat carrier flows from the first sub-flow channel to each second sub-flow channel corresponding to the position of the battery cell. The flow area of the first sub-flow channel is larger than that of the second sub-flow channel, and the heat carrier in the first sub-flow channel enters each second sub-flow channel after being divided. In the liquid outlet process of the flow channel: the heat carrier in each second sub-flow channel reaches the first sub-flow channel after being converged, and then is discharged from the liquid inlet and outlet pipe along the first sub-flow channel. By providing the beam body including the first limiting beam, the first limiting beam is arranged between the first side of the frame and the battery cell, and the first sub-flow channel is arranged at a position covered by the second non-contact surface. At least part of the first sub-flow channel with a larger flow area and the first limiting beam are separated by the heat insulation gap to reduce heat transfer between the first sub-flow channel and the first limiting beam. In this way, the heating or cooling rate of the flow channel at the end away from the liquid inlet and outlet pipe can be improved, and the heating or cooling rate of the heat exchange plate for the battery cell arranged at the end away from the first side can be improved. This is beneficial to reducing the temperature difference between battery cells at different positions and improving the overall temperature control performance of the battery device.

[0029] According to some embodiments of the present application, optionally, the end surface is provided with a first edge close to the end of the first side, the first side is provided with a pipe hole capable of accommodating the liquid inlet and outlet pipe, a part of the first edge surrounds an avoidance gap, the opening of the avoidance gap is arranged towards the pipe hole, a part of the first non-contact surface is coincided with a part of the edge of the avoidance gap, the coincided edge of the first non-contact surface and the avoidance gap forms a first side opening communicated with the heat insulation gap, and the heat insulation gap is provided with a first blocking member blocking the first side opening.

[0030] By blocking the first side opening of the heat insulation gap with the first blocking member, the entry of foreign matters such as aluminum chips into the position of the battery cell through the heat insulation gap can be reduced, thereby reducing the risk of scratching the insulating layer of the heat exchange plate corresponding to the battery cell by aluminum chips and other substances, and also reducing the risk of insulation failure or thermal runaway caused by the entry of aluminum chips and other substances into the position of the battery cell.

[0031] According to some embodiments of the present application, optionally, the end surface is provided with a second edge away from the end of the first side, a part of the first non-contact surface is coincided with a part of the second edge, the coincided edge of the first non-contact surface and the second edge forms a second side opening communicated with the heat insulation gap, and the heat insulation gap is provided with a second blocking member blocking the second side opening.

[0032] By setting the second blocking member to block the second side opening of the heat insulation gap, the foreign matters such as aluminum scraps can be reduced to pass through the heat insulation gap to the position of the battery cell, thereby reducing the risk of the corresponding heat exchange plate part of the battery cell being scratched by the aluminum scraps and the like to damage the insulating layer, and also reducing the risk of the insulation failure or thermal runaway and the like caused by the aluminum scraps and the like entering the position of the battery cell.

[0033] According to some embodiments of the present application, optionally, the beam body includes an intermediate beam arranged between the battery cells; and the flow channel includes a second sub-flow channel arranged in the position of the heat exchange plate corresponding to the battery cells and the intermediate beam, and at least part of the second sub-flow channel is arranged at the position covered by the second non-contact surface.

[0034] The beam body includes an intermediate beam arranged between the battery cells, and the heat transfer rate between at least part of the second sub-flow channel of the heat exchange plate and the intermediate beam can be reduced by the heat insulation gap between the intermediate beam and the heat exchange plate, so that the heat of the heat exchange plate is more used to control the temperature of the battery cells, the control efficiency of the temperature of the battery cells is improved, and by reducing the heat transfer from the heat exchange plate to the intermediate beam, the heat of the heat exchange plate can be brought to a position farther from the first side edge, thereby improving the heating or cooling rate of the battery cells arranged at the end far from the first side edge by the heat exchange plate, which is beneficial to reducing the temperature difference between the battery cells at different positions and improving the overall temperature control performance of the battery device.

[0035] According to some embodiments of the present application, optionally, the battery device further includes a bottom guard plate arranged at the side of the heat exchange plate opposite to the battery cells and the beam body.

[0036] The bottom guard plate is arranged at the side of the heat exchange plate opposite to the battery cells and the beam body, so that the heat exchange plate can be protected by the bottom guard plate to reduce the risk of the heat exchange plate and the battery cells being pricked by sharp objects.

[0037] According to some embodiments of the present application, optionally, the beam body and the heat exchange plate are connected and fixed by fasteners.

[0038] The beam body and the heat exchange plate are connected and fixed by fasteners, and the heat transfer between the beam body and the flow channel of the heat exchange plate is interrupted by the heat insulation gap, so that the structural strength of the battery device can be further improved while reducing the heat loss of the heat exchange plate.

[0039] According to some embodiments of the present application, optionally, the position of the fastener on the end surface is located in the first contact surface.

[0040] The position of the fastener penetrating the end surface of the beam body is arranged in the first contact surface, and since the first contact surface and the second contact surface can be abutted and matched, the structural rigidity of the beam body and the heat exchange plate connected by the fastener is improved.

[0041] The embodiment of the second aspect of the application provides a box, comprising: a heat exchange plate, an internal part of the heat exchange plate being provided with a flow channel; a beam body, the beam body being arranged at one side of the heat exchange plate, one end of the beam body close to the heat exchange plate being provided with an end face, the end face comprising a first contact surface and a first non-contact surface, a surface of the heat exchange plate comprising a second contact surface and a second non-contact surface, the first contact surface being abutted to the second contact surface, the first non-contact surface being arranged in opposite and spaced relation to the second non-contact surface, so that a heat insulation gap is formed between the first non-contact surface and the second non-contact surface, and at least part of the flow channel of the heat exchange plate is arranged at a position covered by the second non-contact surface.

[0042] In the embodiment of the application, the first contact surface of the beam body is abutted to the second contact surface of the heat exchange plate to meet the structural strength of the battery device, the first non-contact surface of the beam body is arranged in opposite and spaced relation to the second non-contact surface of the heat exchange plate to form a heat insulation gap, and at least part of the flow channel of the heat exchange plate is arranged at a position covered by the second non-contact surface, so that the beam body and at least part of the flow channel of the heat exchange plate are separated by the heat insulation gap, thereby reducing the direct contact between the beam body and the heat exchange plate at the position where the flow channel is arranged, efficiently blocking the heat transfer from the heat exchange plate to the beam body, reducing the heat loss of the heat exchange plate, improving the heating and cooling rate of the heat exchange plate to the battery cell, and making the heat management effect of the heat exchange plate to the battery cell better.

[0043] The embodiment of the third aspect of the application provides an energy storage device, comprising: the battery device in any one of the embodiments of the first aspect; or the box in any one of the embodiments of the second aspect.

[0044] Since the energy storage device comprises the above-mentioned battery device or box, the battery device or box can reduce the heat loss of the heat exchange plate and improve the heat management efficiency of the heat exchange plate to the battery cell, and therefore, the energy storage device can have higher battery cell temperature management efficiency.

[0045] The embodiment of the fourth aspect of the application provides a power consumption device, comprising: the battery device in any one of the embodiments of the first aspect; or the box in any one of the embodiments of the second aspect.

[0046] Since the power consumption device comprises the above-mentioned battery device or box, the battery device or box can reduce the heat loss of the heat exchange plate and improve the heat management efficiency of the heat exchange plate to the battery cell, and therefore, the power consumption device can have higher battery cell temperature management efficiency.

[0047] Additional aspects and advantages of the embodiments of the application will be in part apparent and in part pointed out hereinafter in the description of the embodiments of the application. BRIEF DESCRIPTION OF DRAWINGS

[0048] The above and / or additional aspects and advantages of the embodiments of the application will become apparent and be readily appreciated from the description of the embodiments of the application, taken in conjunction with the following drawings:

[0049] Figure 1 is a structural schematic diagram of a vehicle of one or more embodiments.

[0050] Figure 2 is a perspective exploded structural schematic diagram of a battery device of one or more embodiments.

[0051] Figure 3 is a perspective structural schematic diagram of a battery cell of one or more embodiments.

[0052] Figure 4 is a perspective exploded structural schematic diagram of a battery cell of one or more embodiments.

[0053] Figure 5 is a top structural schematic diagram of a battery device of one or more embodiments.

[0054] Figure 6 is Figure 5 is a cross-sectional structural schematic diagram of the A-A portion shown in

[0055] Figure 7 is Figure 6 is an enlarged structural schematic diagram of the B portion shown in

[0056] Figure 8 is Figure 7 is an enlarged structural schematic diagram of the C portion shown in

[0057] Figure 9 is a bottom structural schematic diagram of a frame and a limiting beam of one or more embodiments.

[0058] Figure 10 is Figure 9 is an enlarged structural schematic diagram of the D portion shown in

[0059] Figure 11 is Figure 10 is a first orthographic structural schematic diagram of the D portion structure and a flow channel shown in

[0060] Reference Signs:

[0061] 1000, vehicle; 100, battery device; 200, controller; 300, motor; 10, battery cell; 11, shell; 111, end cover; 112, housing; 12, electrode assembly; 121, tab; 13, electrode terminal; 14, pressure relief structure; 20, battery box; 21, first part; 22, second part; 231, first limiting beam; 232, second limiting beam; 233, pull rod; 24, end face; 241, first contact face; 242, first non-contact face; 243, first edge; 244, second edge; 245, avoiding gap; 25, heat exchange plate; 251, first plate body; 252, second plate body; 253, recess; 254, flow channel; 261, second contact face; 262, second non-contact face; 271, first sub-flow channel; 272, second sub-flow channel; 28, heat insulation gap; 281, first side opening; 282, second side opening; 291, first plugging member; 292, second plugging member; 30, cross beam; 31, frame; 311, first side edge; 312, second side edge; 313, third side edge; 314, fourth side edge; 315, pipe passing hole; 32, bottom guard plate; 33, fastener; 34, liquid inlet and outlet pipe; S, first orthographic projection. DETAILED DESCRIPTION

[0062] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Examples of the embodiments are shown in the drawings, in which the same or similar notations represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation on the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0063] The terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually a class, and do not limit the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally represents that the front and rear associated objects are in a "or" relationship.

[0064] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0065] In the description of the present application, it needs to be understood that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0066] The following is a summary of the embodiments of the present application.

[0067] New energy battery devices are widely used in various power consuming devices and energy storage devices because of their ability to store and release energy as needed. For example, battery devices can be used in energy storage devices for water, fire, wind and solar power plants, and can also be used in various power consuming devices such as electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment and aerospace. And with the continuous expansion of the application field of battery devices, the market demand is also increasing.

[0068] In related technologies, the battery device usually has a battery cell and a heat exchange plate, and the heat exchange plate is a component for heat management of the battery cell, which can be used to transfer heat to the battery cell or take out the heat of the battery cell. However, in the battery device, the heat exchange plate is usually in direct contact or fixedly connected with the beam body, which causes a large amount of heat of the heat exchange plate to be transferred to the beam body, causing heat loss of the heat exchange plate, thereby affecting the heat management effect of the heat exchange plate on the battery cell.

[0069] To alleviate the above problems, embodiments of the present application provide a battery device, which comprises a plurality of battery cells, a heat exchange plate and a beam body. The beam body and the plurality of battery cells are arranged on the same side of the heat exchange plate. Wherein, one end close to the heat exchange plate is provided with an end face, the end face comprises a first contact surface and a first non-contact surface, the surface of the heat exchange plate comprises a second contact surface and a second non-contact surface, the first contact surface abuts against the second contact surface to meet the contact or connection strength requirement between the heat exchange plate and the beam body, and the first non-contact surface and the second non-contact surface are arranged in opposite intervals to enclose a heat insulation gap, and at least part of the flow channel of the heat exchange plate is arranged at a position covered by the second non-contact surface. In this way, a structure in which the flow channel, the heat insulation gap and the beam body are arranged in sequence is formed, and at least part of the flow channel and the beam body are separated by the heat insulation gap. Therefore, at least part of the flow channel of the heat exchange plate and the beam body are not in direct contact due to the heat insulation gap, so that the heat transfer from the heat exchange plate to the beam body is effectively blocked, the heat loss of the heat exchange plate is reduced, the heating and cooling rate of the battery cells by the heat exchange plate is improved, the heat management effect of the battery cells by the heat exchange plate is better, and the adaptability of the battery device to different environmental temperatures is improved, so that the battery device can adapt to more extreme external environment and working condition requirements.

[0070] The battery device disclosed in the embodiments of the present application can be used in an electric device such as a vehicle, a ship or an aircraft, but is not limited thereto. The battery device disclosed in the present application can be used to form a power supply system of the electric device, so that the weight of the electric device can be reduced.

[0071] The embodiments of the present application provide an electric device using the battery device as a power supply. The electric device can be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, etc. The electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy and an electric aircraft toy, etc. The spacecraft can include an airplane, a rocket, a space shuttle and a spacecraft, etc.

[0072] The following embodiments are described with reference to a vehicle 1000 as an example of an electric device of an embodiment of the present application for convenience of description.

[0073] Please refer to Figure 1 , Figure 1A structural schematic diagram of a vehicle 1000 is provided for some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or a range extended vehicle, etc. The vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as an operating power source of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power demand of the vehicle 1000 during starting, navigation and driving.

[0074] In some embodiments of the present application, the battery device 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0075] Please refer to Figure 2 , Figure 2 A three-dimensional exploded structural schematic diagram of the battery device 100 is provided for some embodiments of the present application. The battery device 100 includes a battery box 20 and a battery cell 10, and the battery cell 10 is contained in the battery box 20. The battery box 20 can contain the battery cell 10 and also be used for protection of the battery cell 10. The battery box 20 can have various structural forms.

[0076] In some embodiments, the battery box 20 can include a first part 21 and a second part 22 that are covered with each other. The first part 21 can be a hollow structure with one end open, so that an accommodation space for containing the battery cell 10 is formed in the first part 21. The second part 22 is also a hollow structure with one end open, and the open side of the first part 21 is covered with the open side of the second part 22.

[0077] In other embodiments, the first part 21 can be a hollow structure with one end open, and the second part 22 is a plate structure, which covers the open side of the first part 21.

[0078] Of course, the battery box 20 formed by the second part 22 and the first part 21 can have various shapes, such as a cylinder, a cuboid, etc.

[0079] In the battery device 100, the battery cell 10 can be multiple, and the multiple battery cells 10 can be connected in series, in parallel, or in a mixed connection. The mixed connection means that the multiple battery cells 10 are connected in series and in parallel. Specifically, the battery cell 10 can be a battery monomer or a battery module, wherein the battery module refers to a module component formed by assembling multiple battery monomers.

[0080] In a specific embodiment, the plurality of battery cells can be directly connected in series or in parallel or in a mixed manner together, and the whole of the plurality of battery cells is accommodated in the case. Of course, the battery device 100 can also be in the form of a plurality of battery cells first connected in series or in parallel or in a mixed manner to form a battery module, and a plurality of battery modules are connected in series or in parallel or in a mixed manner to form a whole and are accommodated in the case. The battery device 100 can also include other structures, for example, the battery device 100 can also include a current collecting component for realizing the electrical connection between the plurality of battery cells.

[0081] Each battery cell can be a secondary battery or a primary battery, and can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell can be in the shape of a cylinder, a flat body, a cuboid, or other shapes.

[0082] The following embodiments are described for convenience with a battery cell 10 as an example of a battery cell.

[0083] Please refer to Figure 3 and Figure 4 , Figure 3 for the three-dimensional structure schematic diagram of the battery cell 10 provided by some embodiments of the present application; Figure 4 for the exploded structure schematic diagram of the battery cell 10 provided by some embodiments of the present application.

[0084] The battery cell refers to the smallest unit that constitutes the battery device 100. As shown in Figure 3 and Figure 4 , the battery cell includes a housing 11, an electrode assembly 12, and other functional components.

[0085] The housing 11 includes an end cover 111 and a shell 112.

[0086] The end cover 111 refers to a component that covers the opening of the shell 112 to isolate the internal environment of the battery cell from the external environment. Without limitation, the shape of the end cover 111 can be adapted to the shape of the shell 112 to fit the shell 112. Optionally, the end cover 111 can be made of a material with certain hardness and strength, such as aluminum alloy, so that the end cover 111 is not easily deformed when subjected to extrusion collision, so that the battery cell can have higher structural strength and safety performance can also be improved. The end cover 111 can be provided with functional components such as electrode terminals 13. The electrode terminals 13 can be used to electrically connect with the electrode assembly 12 for output or input of the electrical energy of the battery cell. In some embodiments, the end cover 111 can also be provided with a pressure relief structure 14 for relieving the internal pressure when the internal pressure or temperature of the battery cell reaches a threshold value. The material of the end cover 111 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the present application does not make special limitations. In some embodiments, an insulating member can also be provided on the inner side of the end cover 111, which can be used to isolate the electrical connection components in the shell 11 from the end cover 111 to reduce the risk of short circuit. Exemplarily, the insulating member can be plastic, rubber, etc.

[0087] The shell 112 is a component for fitting the end cover 111 to form the internal environment of the battery cell, wherein the formed internal environment can be used to accommodate the electrode assembly 12, electrolyte and other components. The shell 112 and the end cover 111 can be independent components, and an opening can be provided on the shell 112, and the end cover 111 is covered on the opening to form the internal environment of the battery cell. Without limitation, the end cover 111 and the shell 112 can also be integrated, specifically, the end cover 111 and the shell 112 can form a common connecting surface before other components enter the shell, and when it is necessary to encapsulate the internal environment of the shell 112, the end cover 111 is covered on the shell 112. The shell 112 can be various shapes and various sizes, such as cuboid, cylinder, hexagonal prism, etc. Specifically, the shape of the shell 112 can be determined according to the specific shape and size of the electrode assembly 12. The material of the shell 112 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the present application does not make special limitations.

[0088] The electrode assembly 12 is a component in which electrochemical reactions occur in the battery cell. One or more electrode assemblies 12 can be contained within the case 11. The electrode assembly 12 is mainly formed by winding or layering a positive electrode sheet and a negative electrode sheet, and a separator is generally provided between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet have portions with active materials that constitute a main body of the electrode assembly 12, and portions without active materials that each constitute a tab 121. The tab 121 of the positive electrode and the tab 121 of the negative electrode can be located together at one end of the main body or at opposite ends of the main body. During charging and discharging of the battery, the positive electrode active material and the negative electrode active material react with an electrolyte, and the tabs 121 connect to the electrode terminal 13 to form a current loop.

[0089] In a first aspect, embodiments of the present application provide a battery device 100, which comprises Figure 7 and Figure 8 It can be understood that the battery device 100 comprises a plurality of battery cells 10, a heat exchange plate 25, and a beam body.

[0090] The heat exchange plate 25 is internally provided with a flow channel 254. The beam body and the plurality of battery cells 10 are arranged on the same side of the heat exchange plate 25. The beam body is provided with an end face 24 at one end close to the heat exchange plate 25. The end face 24 comprises a first contact face 241 and a first non-contact face 242. The surface of the heat exchange plate 25 comprises a second contact face 261 and a second non-contact face 262. The first contact face 241 abuts against the second contact face 261. The first non-contact face 242 is arranged in spaced relation to the second non-contact face 262, so that a heat insulation gap 28 is formed between the first non-contact face 242 and the second non-contact face 262. At least part of the flow channel 254 of the heat exchange plate 25 is arranged at a position covered by the second non-contact face 262.

[0091] The battery cell 10 refers to a unit capable of storing and releasing electric energy. The battery device 100 can comprise one or more battery cells 10. The specific number of battery cells 10 can be selected according to actual needs, and is not limited herein. Optionally, the battery cell 10 can be a battery cell or a battery module. The battery module refers to a module component formed by assembling a plurality of battery cells.

[0092] The beam body refers to a component used for supporting or bearing in the battery device 100, so as to improve the overall structural strength of the battery device 100.

[0093] The heat exchange plate 25 is a component for thermal management of the battery cell 10. For example, it can be used to transfer heat to the battery cell 10 or take away the heat of the battery cell 10 to control the temperature of the battery cell 10 within a certain range. For example, the heat exchange plate 25 is internally provided with a flow channel 254, which can be in communication with an external refrigeration device. The heat transfer medium generated by the external refrigeration device flows in the flow channel 254 and exchanges heat with the battery cell 10 on the outside of the heat exchange plate 25, thereby adjusting the temperature of the battery cell 10. The heat transfer medium can be a liquid and / or a gas.

[0094] In the embodiments of the present application, the first contact surface 241 of the beam body abuts against the second contact surface 261 of the heat exchange plate 25, so as to meet the structural strength of the battery device, while the first non-contact surface 242 of the beam body is arranged in opposite spaced relationship with the second non-contact surface 262 of the heat exchange plate 25 to form a heat insulation gap 28. At least part of the flow channel 254 of the heat exchange plate 25 is arranged at a position covered by the second non-contact surface 262, so that the beam body and at least part of the flow channel 254 of the heat exchange plate 25 are separated by the heat insulation gap 28, thereby reducing the direct contact between the beam body and the heat exchange plate 25 at the position where the flow channel 254 is arranged, achieving efficient blocking of heat transfer from the heat exchange plate 25 to the beam body, reducing heat loss of the heat exchange plate 25, improving the heating and cooling rate of the heat exchange plate 25 to the battery cell 10, and making the heat management effect of the heat exchange plate 25 to the battery cell 10 better, thereby improving the adaptability of the battery device 100 to different environmental temperatures, so that the battery device 100 can adapt to more extreme external environments and working conditions.

[0095] According to some embodiments of the present application, the first orthographic projection of the flow channel 254 on the end surface 24 is located in the first non-contact surface 242.

[0096] The first orthographic projection of the flow channel 254 on the end surface 24 refers to the shadow of the flow channel 254 on the end surface 24 when the projection line is perpendicular to the end surface 24.

[0097] The first orthographic projection of the flow channel 254 on the end surface 24 is located in the first non-contact surface 242, so that the flow channel 254 of the heat exchange plate 25 corresponding to the beam body is separated from the beam body by the heat insulation gap, and the flow channel 254 of the heat exchange plate 25 corresponding to the beam body does not directly contact the beam body, thereby more efficiently blocking the heat transfer from the heat exchange plate 25 to the beam body.

[0098] For the convenience of reading the embodiments, hereinafter the first orthographic projection S will be used instead of the first orthographic projection of the flow channel 254 on the end surface 24, therefore, in the absence of separate description, the first orthographic projection S hereinafter can be understood as the first orthographic projection of the flow channel 254 on the end surface 24.

[0099] Optionally, the edge of the first orthographic projection S and the edge of the first non-contact surface 242 have a spacing.

[0100] The edge of the first orthographic projection S is spaced a certain distance from the edge of the first non-contact surface 242. In this way, the orthographic projection of the part around the flow channel 254 within this distance range on the end face 24 is also located within the first non-contact surface 242. This can further isolate the heat transfer between the heat exchange plate 25 and the beam, thereby further reducing the heat loss of the heat exchange plate 25 and further improving the heating and cooling rate of the heat exchange plate 25 on the battery cell 10.

[0101] Optionally, the edges of the first orthographic projection S on both sides along a preset direction are spaced apart from the edge of the first non-contact surface 242. For example... Figure 11 As shown, the first orthographic projection S passes through the attached... Figure 11 The dashed box diagram in the figure illustrates this. The projection direction of the first orthographic projection S can be roughly understood as the attached... Figure 11 The direction is perpendicular to the paper. The edge of the first orthographic projection S along the preset direction has a distance a1 between it and the edge of the first non-contact surface 242, and the edge of the first orthographic projection S along the other side of the preset direction has a distance a2 between it and the edge of the first non-contact surface 242. By setting a distance between the first orthographic projection S and the edge of the first non-contact surface 242 on both sides along the preset direction, the heat loss of the heat exchange plate 25 can be further reduced, and the heating and cooling rates of the heat exchange plate 25 on the battery cell 10 can be further improved.

[0102] Of course, this application is not limited to this. In other embodiments, the edge of one side of the first orthographic projection S along a preset direction may be set to have a distance a1 or a2 with the edge of the first non-contact surface 242, while the edge of the other side of the first orthographic projection S along the preset direction coincides with the edge of the first non-contact surface 242.

[0103] Optionally, the edge of the first orthographic projection S is spaced 2.5mm-3.5mm from the edge of the first non-contact surface 242. That is, the values ​​of a1 and / or a2 range from 2.5mm to 3.5mm. It is understood that the specific values ​​of a1 and a2 can be the same or different.

[0104] The position within the range of 2.5 mm around the flow channel 254 of the heat exchange plate 25 is close to the flow channel 254, and the heat attenuation is not obvious, so a large amount of heat can still be accumulated. The position outside the range of 2.5 mm around the flow channel 254 is far from the flow channel 254, and the heat attenuation is more obvious, so the accumulated heat is relatively less. By setting the distance between the edge of the first orthographic projection S and the edge of the first non-contact surface 242 to be greater than or equal to 2.5 mm, the flow channel 254 of the heat exchange plate 25 and the part within the range of 2.5 mm around the flow channel 254 can be thermally insulated from the beam body through the thermal insulation gap 28, thereby reducing the transmission efficiency of the heat accumulated around the flow channel 254 to the beam body, so that the heat accumulated around the flow channel 254 can be more used for temperature control of the battery cell 10, to improve the heating or cooling rate of the heat exchange plate 25 to the battery cell 10. On the other hand, by setting the distance between the edge of the first orthographic projection S and the edge of the first non-contact surface 242 to be less than or equal to 3.5 mm, since the heat accumulated outside the range of 3.5 mm around the flow channel 254 of the heat exchange plate 25 is less, the area of the first non-contact surface 242 is not too large, and the area of the thermal insulation gap 28 is not too large, so that the structural strength of the beam body and the contact or connection strength between the beam body and the heat exchange plate 25 can be better balanced.

[0105] Optionally, the distance between the edge of the first orthographic projection S and the edge of the first non-contact surface 242 is 3 mm. For example, the value of at least one of a1 and a2 is 3 mm.

[0106] According to some embodiments of the present application, the second orthographic projection of the flow channel 254 on the second non-contact surface 262 has a distance between the edge of the second orthographic projection and the edge of the second non-contact surface 262.

[0107] The second orthographic projection of the flow channel 254 on the second non-contact surface 262 refers to the shadow of the flow channel 254 on the second non-contact surface 262 when the projection line is perpendicular to the second non-contact surface 262.

[0108] For the convenience of reading this embodiment, hereinafter the second orthographic projection will be used instead of the second orthographic projection of the flow channel 254 on the second non-contact surface 262, so in the absence of separate description, hereinafter the second orthographic projection can be understood as the second orthographic projection of the flow channel 254 on the second non-contact surface 262.

[0109] By setting the distance between the edge of the second orthographic projection and the edge of the second non-contact surface 262, the orthographic projection of the part within the range of the distance around the flow channel on the second non-contact surface 262 can also be located within the second non-contact surface 262, which can further isolate the heat transfer between the heat exchange plate 25 and the beam body, thereby further reducing the heat loss of the heat exchange plate 25, and further improving the heating and cooling rate of the heat exchange plate 25 to the battery cell.

[0110] Optionally, the distance between the edge of the second orthographic projection and the edge of the second non-contact surface 262 is 2.5mm-3.5mm. For example, the distance between the edge of the second orthographic projection and the edge of the second non-contact surface 262 is 3mm.

[0111] By setting the distance between the edge of the second orthographic projection and the edge of the second non-contact surface 262 to be greater than or equal to 2.5mm, the flow channel 254 of the heat exchange plate 25 and the part within the range of 2.5mm around the flow channel 254 can be thermally isolated from the beam body by the heat insulation gap, thereby reducing the transfer efficiency of the heat accumulated around the flow channel 254 to the beam body, so that the heat accumulated around the flow channel 254 can be used more for temperature control of the battery cell, to improve the heating or cooling rate of the heat exchange plate to the battery cell 10. On the other hand, by setting the distance between the edge of the second orthographic projection and the edge of the second non-contact surface 262 to be less than or equal to 3.5mm, the void area formed between the heat exchange plate 25 and the beam body by the heat insulation gap is limited, to correspondingly improve the structural strength of the heat exchange plate 25.

[0112] According to some embodiments of the present application, optionally, the shape of the flow channel 254 corresponds to the shape of the first non-contact surface 242.

[0113] It can be understood that the shape of the flow channel 254 corresponding to the shape of the first non-contact surface 242 can mean that the shape of the flow channel 254 is similar to the shape of the first non-contact surface 242, or that the shape of the flow channel 254 is the same as the shape of the first non-contact surface 242, or that the shape of the flow channel 254 is substantially the same as the shape of the first non-contact surface 242.

[0114] By setting the shape of the flow channel 254 to correspond to the shape of the first non-contact surface 242, the heat insulation effect between the flow channel 254 and the beam body can be met, while the area waste of the first non-contact surface 242 and the second non-contact surface 262 can be reduced, so that the end surface 24 can be arranged with a relatively larger first contact surface 241 to abut against the second contact surface 261 of the heat exchange plate 25, thereby improving the structural strength of the beam body itself, and improving the contact or connection strength between the beam body and the heat exchange plate 25, and the structural strength performance of the battery device 100 is also considered.

[0115] For example, the shape of the flow channel 254 is substantially the same as the shape of the first orthographic projection S, and thus the shape of the flow channel 254 in this embodiment can be understood with reference to the shape of the first orthographic projection S.

[0116] As shown in Figure 11 , the first orthographic projection S and the first non-contact surface 242 can both be provided in a substantially J-shaped shape as shown in Figure 11 , and of course it can be understood that the shapes of the first orthographic projection S and the first non-contact surface 242 can be reasonably selected based on specific needs, and are not limited to the examples shown in the drawings. Figure 11 For example, in other embodiments, the shapes of the first orthographic projection S and the first non-contact surface 242 can also be provided in an S shape, an L shape, a Y shape, etc., and this list is not exhaustive.

[0117] According to some embodiments of the present application, as shown in Figure 8 , at least a portion of the thermal insulation gap 28 is a hollow structure. In this way, the hollow structure of the thermal insulation gap 28 can contain gas. Optionally, the gas contained in the hollow structure of the thermal insulation gap 28 can be air, and of course it can also be other gases. The use of a hollow structure can form a layer of insulating gas between the beam body and the heat exchange plate 25 at the hollow structure, and since the thermal conductivity of air and other gases is low, the heat insulation effect of the flow channel 254 can be improved, further reducing the heat loss of the heat exchange plate 25, and further improving the heating and cooling rate of the heat exchange plate 25 to the battery cell 10.

[0118] According to some embodiments of the present application, as shown in Figure 8 , the battery device 100 further comprises a blocking member, a portion of the thermal insulation gap 28 extends to the edge of the end face 24, and the thermal insulation gap 28 is provided with a side opening at one end close to the edge of the end face 24, and the blocking member is arranged in the thermal insulation gap 28 and blocks the side opening.

[0119] By providing the blocking member to block the side opening of the thermal insulation gap 28, the risk of aluminum chips and other substances between the beam body and the heat exchange plate 25 passing through the thermal insulation gap 28 and the side opening to the side of the beam body where the battery cell 10 is located can be reduced, thereby reducing the risk of the heat exchange plate 25 at the battery cell 10 being scratched by aluminum chips and other substances to damage the insulating layer, and also reducing the risk of insulation failure or thermal runaway caused by aluminum chips and other substances entering the location of the battery cell 10.

[0120] Optionally, the blocking member can be made of insulating material, for example, the blocking member can be a plastic member or a rubber member or a structure member solidified and formed by sealant, etc.

[0121] Optionally, as shown in Figure 8 , at least a portion of the thermal insulation gap 28 is hollow, which can be understood as the part of the thermal insulation gap 28 that does not contain the blocking member being hollow.

[0122] According to some embodiments of the present application, optionally, as shown in Figure 8 The first non-contact surface 242 is recessed relative to the first contact surface 241 to form a recess having an opening, and the opening of the recess is arranged towards the heat exchange plate 25. The second non-contact surface 262 is flush with the second contact surface 261, and the first non-contact surface 242 is spaced apart from the second non-contact surface 262 due to the recessed arrangement of the first non-contact surface 242.

[0123] Of course, the present application is not limited thereto, and in other embodiments, the second non-contact surface 262 can also be recessed relative to the second contact surface 261, with the first non-contact surface 242 recessed relative to the first contact surface 241 to form a recess having an opening, and the opening of the recess arranged towards the heat exchange plate 25; or the second non-contact surface 262 can also be arranged protruding relative to the second contact surface 261, and the protruding height of the second non-contact surface 262 relative to the second contact surface 261 is less than the depth of the recess.

[0124] Alternatively, in other embodiments, the second non-contact surface can also be recessed relative to the second contact surface, and the second non-contact surface is recessed relative to the second contact surface to form a recess having an opening, and the opening of the recess is arranged towards the first non-contact surface of the beam body, while the first non-contact surface of the beam body is flush with the first contact surface, so that the end surface of the beam body is a whole plane.

[0125] In the present embodiment, the first non-contact surface 242 is recessed relative to the first contact surface 241 to form a recess with the first non-contact surface 242, and by arranging the opening of the recess towards the heat exchange plate 25, the first non-contact surface 242 can form a thermal insulation gap 28 with the second non-contact surface 262, regardless of whether the second non-contact surface 262 of the heat exchange plate 25 is flush with the second contact surface 261, or the second non-contact surface 262 is recessed relative to the second contact surface 261, or the second non-contact surface 262 is arranged protruding relative to the second contact surface 261 and the protruding height of the second non-contact surface 262 relative to the second contact surface 261 is less than the depth of the recess. In this way, the beam body can adapt to a more diverse structure of the heat exchange plate 25, and has better compatibility with the structure of the heat exchange plate 25.

[0126] Alternatively, in other embodiments, part of the flow channels are arranged at intervals, and a hollow structure is formed at the interval position between adjacent flow channels, and the second non-contact surface comprises the hollow structure.

[0127] It is understood that, in the corresponding embodiments, the second non-contact surface can be broadly understood as the part of the heat exchange plate used to non-contactly cooperate with the beam. It is understood that the structural form of the part of the heat exchange plate used to non-contactly cooperate with the beam can be diverse, such as the hollow structure mentioned above, and it is not necessarily required that the second non-contact surface has the characteristics of a solid surface.

[0128] For example, in a corresponding embodiment, the heat exchange plate may be a harmonica tube type heat exchange plate, wherein the heat exchange plate has a plurality of spaced strip structures, the flow channel is located inside the strip structure, and a hollow structure is formed at the interval between adjacent strip structures. The first contact surface may be the surface of a portion of the strip structure, and the second non-contact surface may be the hollow structure, or it may be the hollow structure and a portion of the surface of the strip structure located on one or both sides of the hollow structure.

[0129] By setting at least a portion of the second non-contact surface as a hollow structure, the thermal contact area between the heat exchange plate and the beam can be naturally reduced, thus better insulating or cooling the flow channel.

[0130] According to some embodiments of this application, optionally, in combination with Figure 5 and Figure 6 It is understood that the battery device 100 also includes a frame 31, and a heat exchange plate 25 is located on one side of the frame 31. The frame 31 and the heat exchange plate 25 enclose a receiving space, and the beam and the battery cell 10 are both located within the receiving space.

[0131] The frame 31 refers to the annular frame component used to surround the outer periphery of the battery cell 10. For example, the frame 31 can be a closed annular structure formed by connecting multiple metal or composite material sides end to end in sequence. The sides can be connected by welding, snap-fitting, screwing, or other methods.

[0132] The number of side edges can be three, four, or five or more. For example, such as Figure 5 As shown, there are four sides: a first side 311, a second side 312, a third side 313, and a fourth side 314. The first side 311 and the second side 312 are positioned opposite each other, and the third side 313 and the fourth side 314 are positioned opposite each other, forming a quadrilateral frame 31. Of course, it is understood that the specific number of sides can be determined based on the shape of the frame 31, and is not limited here. Alternatively, the frame 31 can also be a one-piece structure.

[0133] The beam and the battery cell 10 are both located within the housing space. By utilizing the heat insulation gap 28 between the beam and the flow channel 254 of the heat exchange plate 25, the heat transfer between the beam inside the frame 31 and the flow channel 254 of the heat exchange plate 25 is reduced, thus achieving a balance between the structural strength and thermal management performance of the battery device 100.

[0134] As shown in Figure 5 the first side edge 311 is provided with an inlet and outlet pipe 34.

[0135] The inlet and outlet pipe 34 refers to a component for connecting an external refrigeration device, wherein the inlet and outlet pipe 34 is in communication with the flow channel 254 inside the heat exchange plate 25, when the inlet and outlet pipe 34 is connected with the external refrigeration device, the external refrigeration device can continuously supply the heat carrying medium to the flow channel 254 through the inlet and outlet pipe 34, and recover the heat carrying medium discharged from the flow channel 254.

[0136] The beam body includes a first limiting beam 231, which is arranged between the first side edge 311 and the battery cell 10.

[0137] The first limiting beam 231 is a component for restraining the deformation of the battery cell 10, so as to limit the expansion force and deformation degree of the battery cell 10. For example, as shown in Figure 5 the battery device 100 further includes a second limiting beam 232 and a pull rod 233, the second limiting beam 232 is arranged between the battery cell 10 and the second side edge 312, one end of the pull rod 233 is connected with the first limiting beam 231, the other end of the pull rod 233 is connected with the second limiting beam 232, the battery cell 10 is arranged between the first limiting beam 231 and the second limiting beam 232, the battery cell 10 is arranged in a stacked manner along the extension direction of the pull rod 233, the first limiting beam 231 and the second limiting beam 232 are limited to move in a direction that makes the distance between them larger by the pull rod 233, so as to limit the expansion force and expansion deformation degree of the battery cell 10 between the first limiting beam 231 and the second limiting beam 232.

[0138] The first limiting beam 231 can be a metal material, for example, an aluminum alloy, which can be a die casting or an extruded profile. In order to reduce weight, the first limiting beam 231 can have a cavity inside.

[0139] The flow channel 254 includes a first sub-flow channel 271, which is in communication with the inlet and outlet pipe 34, at least a part of the first sub-flow channel 271 is arranged in the part of the heat exchange plate 25 corresponding to the first limiting beam 231, and the first sub-flow channel 271 is arranged at a position covered by the second non-contact surface 262.

[0140] The flow channel 254 at the part of the heat exchange plate 25 corresponding to the battery cell 10 is a second sub-flow channel 272, and the inlet and outlet processes of the flow channel 254 are exemplified.

[0141] In the liquid inlet process of the flow channel 254: when the heat carrier medium enters the first sub-flow channel 271 from the inlet and outlet pipe 34, it flows into each second sub-flow channel 272 corresponding to the position of the battery cell 10. The flow area of the first sub-flow channel 271 is larger than that of the second sub-flow channel 272, and the heat carrier medium in the first sub-flow channel 271 enters each second sub-flow channel 272 after being divided.

[0142] In the liquid outlet process of the flow channel 254: the heat carrier medium in each second sub-flow channel 272 flows into the first sub-flow channel 271 after being converged, and then flows out of the inlet and outlet pipe 34 along the first sub-flow channel 271.

[0143] The first sub-flow channel 271 corresponding to the first limiting beam 231 of the flow channel 254 is usually the part with a larger flow area of the flow channel 254 due to its proximity to the inlet and outlet pipe 34. By arranging the beam body including the first limiting beam 231 between the first side edge 311 of the frame 31 and the battery cell 10, and arranging the first sub-flow channel 271 at the position covered by the second non-contact surface 262, the first sub-flow channel 271 with a larger flow area of the flow channel 254 can be separated from the first limiting beam 231 by the thermal insulation gap 28 to reduce heat transfer between the first sub-flow channel 271 and the first limiting beam 231. This can improve the heating or cooling rate of the end of the flow channel 254 away from the inlet and outlet pipe 34, and further improve the heating or cooling rate of the battery cell 10 arranged at the end away from the first side edge 311 by the heat exchange plate 25. This is conducive to reducing the temperature difference between battery cells 10 at different positions and improving the overall temperature control performance of the battery device 100.

[0144] According to some embodiments of the present application, the end surface 24 is provided with a first edge 243 at the end close to the first side edge 311, the first side edge 311 is provided with a pipe passing hole 315 capable of accommodating the inlet and outlet pipe 34, a part of the first edge 243 forms an avoidance gap 245, the opening of the avoidance gap 245 is arranged towards the pipe passing hole 315, a part of the edge of the first non-contact surface 242 overlaps a part of the edge of the avoidance gap 245, and the overlapping edge of the first non-contact surface 242 and the avoidance gap 245 forms a first side opening 281 communicating with the thermal insulation gap 28, and the first side opening 281 is blocked by a first blocking member 291 arranged in the thermal insulation gap 28.

[0145] By arranging the first blocking member 291 to block the first side opening 281 of the thermal insulation gap 28, the entry of aluminum chips and other foreign matters into the position of the battery cell 10 through the thermal insulation gap 28 can be reduced, thereby reducing the risk of scratching the insulating layer of the part of the heat exchange plate 25 corresponding to the battery cell 10 by aluminum chips and other substances, and also reducing the risk of insulation failure or thermal runaway caused by the entry of aluminum chips and other substances into the position of the battery cell 10.

[0146] Optionally, the end surface 24 of the first limiting beam 231 comprises two first non-contact surfaces 242 symmetrically arranged on opposite sides of the avoiding gap 245, each first non-contact surface 242 can be arranged as a J shape as shown in Figure 10 Optionally, the first non-contact surface 242 is not limited to the J shape as an example, but can also be an S shape, an I shape, a Y shape, etc.

[0147] The heat exchange plate 25 can be provided with two first sub-flow channels 271 corresponding to the position of the first limiting beam 231, one of which can be used for liquid inlet of the heat exchange plate 25, and the other can be used for liquid outlet of the heat exchange plate 25. The surface of the heat exchange plate 25 comprises two second non-contact surfaces 262, and each second non-contact surface 262 is arranged with a first sub-flow channel 271 on the inner side (i.e. the side of the second non-contact surface 262 facing away from the first non-contact surface 242).

[0148] The two first non-contact surfaces 242 and the two second non-contact surfaces 262 of the heat exchange plate 25 are arranged in pairs.

[0149] According to some embodiments of the present application, the end surface 24 is provided with a second edge 244 opposite to the end of the first side edge 311, and a part of the first non-contact surface 242 coincides with a part of the second edge 244. The coincident edge of the first non-contact surface 242 and the second edge 244 forms a second side opening 282 communicating with the heat insulation gap 28, and the second side opening 282 is provided with a second blocking member 292 blocking the second side opening 282.

[0150] By setting the second blocking member 292 to block the second side opening 282 of the heat insulation gap 28, the risk of aluminum chips and other foreign matter entering the position of the battery cell 10 through the heat insulation gap 28 can be reduced, thereby reducing the risk of the corresponding part of the heat exchange plate 25 of the battery cell 10 being scratched by aluminum chips and other substances. Insulation layer, and can also reduce the risk of insulation failure or thermal runaway caused by aluminum chips and other substances entering the position of the battery cell 10.

[0151] Optionally, in combination with Figure 8 and Figure 9 It can be understood that the second blocking member 292 can be arranged as a gasket shape as shown in Figure 8 and Figure 9 The second blocking member 292 is located between the first non-contact surface 242 and the second non-contact surface 262, and the distance between the first non-contact surface 242 and the second non-contact surface 262 is substantially equal to the thickness of the second blocking member 292, so that the side surface of the second blocking member 292 just blocks the second side opening 282.

[0152] According to some embodiments of the present application, the battery device 100 optionally further comprises a bottom guard plate 32, which is arranged on the side of the heat exchange plate 25 opposite to the battery cell and the beam body.

[0153] The bottom guard plate 32 is a plate-shaped component arranged at the bottom of the box body. It can be used to support the battery cell 10 and resist the impact on the bottom of the box body to provide protection for the battery cell 10. Specifically, the bottom guard plate 32 can be a square plate, a triangular plate, a circular plate, etc. The specific shape of the bottom guard plate 32 can be selected according to actual design needs and is not limited herein.

[0154] The material of the bottom guard plate 32 can be metal, composite material, or a multi-layer structure formed by metal and composite material.

[0155] The bottom guard plate 32 is arranged on the side of the heat exchange plate 25 opposite to the accommodation space. The heat exchange plate 25 can be protected by the bottom guard plate 32 to reduce the risk of being pierced by sharp objects.

[0156] According to some embodiments of the present application, the beam body and the heat exchange plate 25 are connected and fixed by the fastener 33.

[0157] The heat transfer between the beam body and the flow channel 254 of the heat exchange plate 25 is interrupted by the heat insulation gap 28 to reduce the heat loss of the heat exchange plate 25. At the same time, the beam body and the heat exchange plate 25 are connected and fixed by the fastener 33, which can further improve the structural strength of the battery device 100.

[0158] Optionally, as shown in Figure 10 , the position of the fastener 33 on the end face 24 is located in the first contact surface 241.

[0159] The position of the fastener 33 on the end face 24 of the beam body is arranged in the first contact surface 241. Since the first contact surface 241 and the second contact surface 261 can be abutted and matched, the structural rigidity of the connection of the beam body and the heat exchange plate 25 by the fastener 33 is improved.

[0160] Optionally, the fastener 33 can be a core-pulling rivet or a sealed rivet nut, etc.

[0161] According to some embodiments of the present application, optionally, as shown in Figure 8 , the heat exchange plate 25 can comprise a first plate body 251 and a second plate body 252. The second plate body 252 is arranged on the side of the first plate body 251 opposite to the beam body and the battery cell 10. The second plate body 252 is provided with a recessed portion 253 recessed in the direction away from the first plate body 251. The recessed portion 253 and the first plate body 251 enclose the flow channel 254.

[0162] The first plate body 251 and the second plate body 252 can be metal components, for example, aluminum plates or aluminum alloy plates, and the first plate body 251 and the second plate body 252 can be connected together by a brazing process. Alternatively, in other embodiments, the first plate body 251 can be a metal component, and the second plate body 252 can be an aluminum plastic film, and the second plate body 252 is formed by hot pressing and bonding with the first plate body 251.

[0163] According to some embodiments of the present application, as shown in Figure 8 , at least part of the second contact surface 261 is arranged in a staggered manner with the flow channel 254 inside the heat exchange plate 25. The risk of stress deformation of the flow channel 254 can be reduced, and the direct contact between the flow channel 254 and the beam body of the heat exchange plate 25 can be further reduced, thereby further improving the heat management effect of the heat exchange plate 25 on the battery cell 10.

[0164] In one specific embodiment of the present application, the battery device 100 includes a frame 31, a plurality of battery cells 10, a first limiting beam 231, and a heat exchange plate 25.

[0165] Please refer to Figure 5 and Figure 6 , Figure 5 , which show the top view structure of the battery device 100 in some embodiments. Figure 6 shows the cross-sectional structure of the A-A part shown in Figure 5 .

[0166] In combination with Figure 5 and Figure 6 , it can be understood that the frame 31 is a quadrilateral frame. The first limiting beam 231 and the plurality of battery cells 10 are arranged inside the frame 31.

[0167] Among them, the plurality of battery cells 10 are arranged in a stacked manner along the y direction, the first limiting beam 231 is arranged at one end of the plurality of battery cells 10 along the y direction and between the first side edge 311 of the frame 31 and the battery cell 10.

[0168] The z direction is perpendicular to the x direction and the y direction respectively, the plurality of battery cells 10 and the first limiting beam 231 are arranged on one side of the heat exchange plate 25 along the z direction, and correspondingly, a part of the heat exchange plate 25 is arranged corresponding to the first limiting beam 231 along the z direction, and a part of the heat exchange plate 25 is arranged corresponding to the plurality of battery cells 10 along the z direction.

[0169] Please refer to Figure 7 and Figure 8 , Figure 7 , which show the partial cross-sectional structure of the battery device 100 in some embodiments of the present application. Figure 8 is Figure 7 , which is an enlarged structure of the C part in

[0170] The end of the first limiting beam 231 that is relatively close to the heat exchange plate 25 along the z direction is set as an end face 24, which includes a first contact surface 241 and a first non-contact surface 242.

[0171] The first contact surface 241 is a plane, and the first non-contact surface 242 is recessed relative to the first contact surface 241, thereby forming a groove that is recessed relative to the first contact surface 241. Optionally, the recess depth of the groove formed by the first non-contact surface 242 relative to the first contact surface 241 is 1.5 mm. Of course, the recess depth of the groove in this embodiment is not limited to the 1.5 mm exemplified. In other embodiments, the recess depth of the groove can also be appropriately adjusted according to the wall thickness of the first limiting beam 231.

[0172] The heat exchange plate 25, along the z-direction, has a surface corresponding to the first limiting beam 231, including a second contact surface 261 and a second non-contact surface 262. The second contact surface 261 abuts against the first contact surface 241. The first non-contact surface 242 and the second non-contact surface 262 are spaced apart relative to each other along the z-direction to form a heat insulation gap 28.

[0173] The heat exchange plate 25 can be a cold plate, and a flow channel 254 is provided inside the heat exchange plate 25. Part of the flow channel 254 of the heat exchange plate 25 is located at a position covered by the second non-contact surface 262; that is, part of the flow channel 254 of the heat exchange plate 25 is located on the side of the second non-contact surface 262 facing away from the first non-contact surface 242 along the z-direction. Thus, the position of the flow channel 254 approximately corresponds along the z-direction to the first non-contact surface 242 and the heat insulation gap 28. The shape of the first non-contact surface 242 is the same as the shape of the flow channel 254.

[0174] like Figure 11 As shown, the first orthographic projection S of the flow channel 254 along the z direction on the end face 24 is located within the first non-contact surface 242. There is a distance a1 between the edge of one end of the first orthographic projection S along the preset direction and the edge of the first non-contact surface 242, and there is a distance a2 between the edge of the other end of the first orthographic projection S along the preset direction and the edge of the first non-contact surface 242. a1 and / or a2 are 3mm.

[0175] By setting the first non-contact surface 242 to correspond to the flow channel 254 of the heat exchange plate 25, the flow channel 254 of the heat exchange plate 25 is not in direct contact with the first limiting beam 231. An air thermally conductive layer is formed in the heat insulation gap 28 between the flow channel 254 of the heat exchange plate 25 and the first limiting beam 231. Since the thermal conductivity of air is low, the heat transfer between the first limiting beam 231 and the heat exchange plate 25 is reduced, so that the energy of the heat exchange plate 25 is used more for the thermal management of the cell 10, thereby improving the thermal management performance of the battery device 100.

[0176] The heat exchange plate 25 is connected and fixed with the first limiting beam 231 through the fastener 33.

[0177] As shown in Figure 9 and Figure 10 , one end of the first non-contact surface 242 extends to the avoiding gap 245 of the first limiting beam 231, so that the recess formed by the first non-contact surface 242 forms a first side opening 281 in communication with the avoiding gap 245, the first side opening 281 is located at the position where the first non-contact surface 242 intersects with the avoiding gap 245, and the first side opening 281 is provided with a first blocking member 291 for blocking the first side opening 281, the first blocking member 291 is blocking glue.

[0178] As shown in Figure 9 and Figure 10 , one end of the first non-contact surface 242 extends to one end of the first limiting beam 231 close to the battery cell 10, so that the recess formed by the first non-contact surface 242 forms a second side opening 282 arranged towards the side where the battery cell 10 is located, the second side opening 282 is located at the position where the first non-contact surface 242 intersects with the one end of the first limiting beam 231 close to the battery cell 10, and the second side opening 282 is provided with a second blocking member 292 for blocking the second side opening 282, the second blocking member 292 is blocking glue.

[0179] The heat exchange plate 25 is connected and fixed with the first limiting beam 231 through the fastener 33, and in the production practice, for the case that aluminum chips enter the heat insulation gap 28, the first side opening 281 and / or the second side opening 282 of the heat insulation gap 28 are blocked by the first blocking member 291 and / or the second blocking member 292, which can prevent the aluminum chips from being exposed to the position of the battery cell 10, thereby reducing the risk of scratching the insulating layer of the heat exchange plate 25 by the exposed aluminum chips, and reducing the risk of insulation failure and even thermal runaway and fire scrap caused by the exposed overcurrent position entering the aluminum chips, and improving the safety performance of the battery device 100 in the production and use process.

[0180] Optionally, the battery device 100 further comprises an intermediate beam, which may Figure 5 be the cross beam 30 shown in the above embodiment, the cross beam 30 is arranged in the frame 31 and between the battery cells 10. The end face 24 in the above embodiment may not be arranged at the end of the cross beam 30 close to the heat exchange plate 25, and the first contact surface 241 and the first non-contact surface 242 may

[0181] not be arranged.

[0182] Correspondingly, the intermediate beam is provided with an end face at one end close to the heat exchange plate, and the end face comprises a first contact face and a first non-contact face. The surface of the heat exchange plate provided towards the intermediate beam comprises a second contact face and a second non-contact face. The end face, the first contact face, the first non-contact face, the second contact face, the second non-contact face and the relationship therebetween can be understood in a non-conflicting manner with reference to the examples in the above embodiments, and will not be repeated here.

[0183] The flow channel comprises a second sub-flow channel, and the second sub-flow channel is arranged in a position of the heat exchange plate corresponding to the battery cell and the intermediate beam. At least part of the second sub-flow channel is arranged at a position covered by the second non-contact face.

[0184] In this way, the heat transfer rate between the second sub-flow channel of the heat exchange plate and the intermediate beam can be reduced by using the heat insulation gap between the intermediate beam and the heat exchange plate, so that the heat of the heat exchange plate is more used to control the temperature of the battery cell, the control efficiency of the temperature of the battery cell is improved, and by reducing the heat transfer from the heat exchange plate to the intermediate beam, the heat of the heat exchange plate can be brought to a position farther from the first side edge, thereby improving the heating or cooling rate of the battery cell arranged at the end far from the first side edge by the heat exchange plate, which is beneficial to reducing the temperature difference between the battery cells at different positions and improving the overall temperature control performance of the battery device.

[0185] The second aspect of the application provides a box body comprising a heat exchange plate 25 and a beam body.

[0186] The heat exchange plate 25 is internally provided with a flow channel 254; the beam body is arranged at one side of the heat exchange plate 25, and the beam body is provided with an end face 24 at one end close to the heat exchange plate 25. The end face 24 comprises a first contact face 241 and a first non-contact face 242. The surface of the heat exchange plate 25 comprises a second contact face 261 and a second non-contact face 262. The first contact face 241 abuts against the second contact face 261, and the first non-contact face 242 is arranged in spaced relation with the second non-contact face 262, so as to form a heat insulation gap 28 between the first non-contact face 242 and the second non-contact face 262. At least part of the flow channel 254 of the heat exchange plate 25 is arranged at a position covered by the second non-contact face 262.

[0187] The box body is a component for accommodating the battery cell 10. Specifically, the box body can be the first part 21 described above, and can be used in combination with the second part 22 of the battery box 20. Alternatively, the box body can also be used alone, and the specific use mode can be reasonably selected according to actual needs, which will not be limited here.

[0188] The heat exchange plate 25 and the beam body and the relationship therebetween can be understood in a non-conflicting manner with reference to the heat exchange plate 25 and the beam body and the relationship therebetween in the embodiments of the battery device 100, which will not be repeated here.

[0189] In the embodiments of the present application, the first contact surface 241 of the beam body abuts against the second contact surface 261 of the heat exchange plate 25, so as to meet the structural strength of the battery device 100, and at the same time, by arranging the first non-contact surface 242 of the beam body and the second non-contact surface 262 of the heat exchange plate 25 to be opposite and spaced to form the heat insulation gap 28, at least part of the flow channel 254 of the heat exchange plate 25 is arranged at a position covered by the second non-contact surface 262, so that the beam body and at least part of the flow channel 254 of the heat exchange plate 25 are separated by the heat insulation gap, thereby reducing the direct contact between the beam body and the heat exchange plate 25 provided with the flow channel 254, achieving efficient blocking of heat transfer from the heat exchange plate 25 to the beam body, reducing the heat loss of the heat exchange plate 25, improving the heating and cooling rate of the heat exchange plate 25 to the battery cell 10, and making the heat management effect of the heat exchange plate 25 to the battery cell 10 better.

[0190] The embodiments of the third aspect of the present application provide a battery device 100, comprising: the battery device 100 of any one of the embodiments of the first aspect; or the case of any one of the embodiments of the second aspect.

[0191] Since the battery device 100 or the case can reduce the heat loss of the heat exchange plate 25 and improve the heat management efficiency of the heat exchange plate 25 to the battery cell 10, the energy storage device can have higher temperature management efficiency of the battery cell 10.

[0192] The embodiments of the fourth aspect of the present application provide a battery device 100, comprising: the battery device 100 of any one of the embodiments of the first aspect; or the case of any one of the embodiments of the second aspect.

[0193] Since the battery device 100 or the case can reduce the heat loss of the heat exchange plate 25 and improve the heat management efficiency of the heat exchange plate 25 to the battery cell 10, the energy storage device can have higher temperature management efficiency of the battery cell 10.

[0194] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0195] While the embodiments of the application have been shown and described, it is to be understood that the embodiments can be varied, modified, substituted and changed by those skilled in the art without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery device, characterized by, The battery device comprises: a plurality of battery cells; a heat exchange plate, an internal flow channel of which is provided; a beam body, the beam body and the plurality of battery cells being arranged on the same side of the heat exchange plate, an end of the beam body close to the heat exchange plate being provided with an end face, the end face comprising a first contact surface and a first non-contact surface, a surface of the heat exchange plate comprising a second contact surface and a second non-contact surface, the first contact surface being arranged against the second contact surface, the first non-contact surface being arranged in a spaced-apart manner with the second non-contact surface, so that a heat insulation gap is formed between the first non-contact surface and the second non-contact surface, at least part of the flow channel of the heat exchange plate being arranged at a position covered by the second non-contact surface.

2. The battery device according to claim 1, wherein: a first orthographic projection of the flow channel on the end face is located in the first non-contact surface, and a spacing is provided between an edge of the first orthographic projection and an edge of the first non-contact surface; and / or an edge of a second orthographic projection of the flow channel on the second non-contact surface is spaced apart from an edge of the second non-contact surface.

3. The battery device according to claim 2, wherein: a shape of the flow channel corresponds to a shape of the first non-contact surface.

4. The battery device according to claim 1 or 2, wherein: at least part of the heat insulation gap is a hollow structure.

5. The battery device according to claim 1 or 2, wherein: the first non-contact surface surrounds a groove recessed relative to the first contact surface, the groove has an opening, and the opening of the groove is arranged towards the heat exchange plate; the second non-contact surface is flush with the second contact surface; or the second non-contact surface is recessed relative to the second contact surface; or the second non-contact surface is arranged in a protruding manner relative to the second contact surface, and a protruding height of the second non-contact surface relative to the second contact surface is less than a depth of the groove; or part of the flow channel is arranged in a spaced-apart manner, a hollow structure is formed at a spacing position between adjacent flow channels, and the second non-contact surface comprises the hollow structure.

6. The battery device according to claim 1 or 2, wherein Further comprising: a blocking member, a part of the heat insulation gap extends to an edge of the end face, and the heat insulation gap is provided with a side opening at an end close to the edge of the end face, the blocking member is arranged in the heat insulation gap and blocks the side opening.

7. The battery device according to claim 1 or 2, wherein Further comprising: a frame, the heat exchange plate is arranged on one side of the frame, the frame and the heat exchange plate enclose a containing space, and the beam body and the battery cells are located in the containing space.

8. The battery device according to claim 7, wherein: the frame comprises a first side edge, and a liquid inlet and outlet pipe is arranged on the first side edge; the beam body comprises a first limiting beam, and the first limiting beam is arranged between the first side edge and the battery cell; the flow channel comprises a first sub-flow channel, the first sub-flow channel is in communication with the liquid inlet and outlet pipe, at least part of the first sub-flow channel is arranged in a part of the heat exchange plate corresponding to the first limiting beam, and the first sub-flow channel is arranged at a position covered by the second non-contact surface.

9. The battery device according to claim 8, wherein: The end surface is provided with a first edge close to one end of the first side edge, the first side edge is provided with a pipe hole for accommodating the inlet and outlet pipe, a part of the first edge forms an avoiding gap, the opening of the avoiding gap is arranged towards the pipe hole, a part of the first non-contact surface is coincided with a part of the edge of the avoiding gap, the first non-contact surface forms a first side opening communicated with the heat insulation gap at the coincided edge of the avoiding gap, the heat insulation gap is provided with a first blocking member for blocking the first side opening; and / or The end surface is provided with a second edge far away from one end of the first side edge, a part of the first non-contact surface is coincided with a part of the second edge, the first non-contact surface forms a second side opening communicated with the heat insulation gap at the coincided edge of the second edge, the heat insulation gap is provided with a second blocking member for blocking the second side opening.

10. The battery device according to claim 7, wherein The beam body comprises an intermediate beam arranged between the battery cells; The flow channel comprises a second sub-flow channel arranged in the heat exchange plate corresponding to the battery cells and the intermediate beam, at least part of the second sub-flow channel is arranged at a position covered by the second non-contact surface.

11. The battery device according to claim 1 or 2, characterized by Further comprising: A bottom guard plate arranged on a side of the heat exchange plate opposite to the battery cells and the beam body.

12. The battery device according to claim 1 or 2, wherein The beam body and the heat exchange plate are connected and fixed by fasteners.

13. The battery device according to claim 12, wherein The position of the fastener on the end surface is located in the first contact surface.

14. A case characterized by, Comprising: A heat exchange plate, the inside of the heat exchange plate is provided with a flow channel; A beam body arranged on a side of the heat exchange plate, the beam body is provided with an end surface close to one end of the heat exchange plate, the end surface comprises a first contact surface and a first non-contact surface, the surface of the heat exchange plate comprises a second contact surface and a second non-contact surface, the first contact surface abuts against the second contact surface, the first non-contact surface is arranged opposite to the second non-contact surface, forming a heat insulation gap between the first non-contact surface and the second non-contact surface, at least part of the flow channel of the heat exchange plate is arranged at a position covered by the second non-contact surface.

15. An energy storage device, characterized by, Comprising: The battery device according to any one of claims 1 to 13; Or The box according to claim 14.

16. An electrical device, comprising: Comprising: The battery device according to any one of claims 1 to 13; Or The box according to claim 14.

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