Battery device and electric equipment

Abstract

The utility model relates to the technical field of batteries, and particularly discloses a battery device and electric equipment.The battery device comprises single batteries and a heat exchange assembly, the heat exchange assembly comprises a heat exchange plate, one side face, in the thickness direction, of the heat exchange plate is a heat exchange face, and a plurality of flow channels sequentially distributed in the first direction are formed in the heat exchange plate; the multiple flow channels are sequentially connected in series to form a heat exchange channel for a heat exchange medium to flow; the flow channels extend in the second direction, and the flow directions of the heat exchange media in any two adjacent flow channels on the heat exchange channel are opposite. Orthographic projections of at least two adjacent flow channels on the heat exchange channel on the heat exchange surface form heat exchange areas, each heat exchange area exchanges heat with one battery monomer, and the first direction intersects with the second direction. With the adoption of the application, each flow channel only corresponds to one battery monomer in the length direction, and the uniform temperature heat exchange effect of the heat exchange assembly on the battery monomer is improved, so that the temperature distribution uniformity of the battery monomer can be improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery device and an electrical equipment. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor related to their development. As the core functional component of electric vehicles, the good working condition of the battery device is the basis for the normal operation of electric vehicles. In order to make the temperature inside the battery device within the appropriate temperature range, a heat exchange plate is often provided in the battery device. The heat exchange plate exchanges heat with the battery cell to achieve temperature control of the battery cell. However, the temperature uniformity of the battery cell under the heat exchange action of the heat exchange plate in the existing battery device needs to be further improved. Utility Model Content

[0003] In view of the above problems, the present application provides a battery device and an electrical equipment, which improves the uniform temperature heat exchange effect of the heat exchange component and can improve the uniformity of temperature distribution of the battery cells.

[0004] A first aspect of the present application provides a battery device, comprising: a battery cell and a heat exchange component;

[0005] The heat exchange assembly includes a heat exchange plate, one side of the heat exchange plate along the thickness direction is a heat exchange surface, and the heat exchange surface exchanges heat with the battery cell; a plurality of flow channels are arranged in sequence along a first direction, and the plurality of flow channels are connected in series to form a heat exchange channel, and the heat exchange channel is used for supplying heat exchange medium; the flow channel extends along a second direction, and the flow directions of the heat exchange medium in any two adjacent flow channels on the heat exchange channel are opposite; the orthographic projection of at least two adjacent flow channels on the heat exchange channel on the heat exchange surface forms a heat exchange area, and each heat exchange area is used for heat exchange with a battery cell; wherein the first direction intersects with the second direction.

[0006] In the present application, at least two adjacent flow channels on the heat exchange channel form a heat exchange area on the orthographic projection of the heat exchange surface, each heat exchange area exchanges heat with a battery cell, and each flow channel corresponds to only one battery cell along its length direction. In the process of the heat exchange medium flowing sequentially along the multiple flow channels corresponding to the heat exchange area, the heat exchanged with other battery cells is greatly reduced, so that the temperature difference between the battery cell and the parts corresponding to different flow channels that exchange heat can be small.

[0007] Moreover, the adjacent multiple flow channels cooperate with each other to adjust the temperature of a battery cell, so that the temperature difference at both ends of the battery cell along the length direction of the flow channel is reduced. In summary, the heat exchange component improves the temperature uniformity of the battery cell, which is conducive to improving the uniformity of the temperature distribution of each battery cell.

[0008] In some embodiments of the present application, a plurality of battery cells are provided and arranged to form a plurality of battery assemblies arranged sequentially along a second direction, and each battery assembly includes a plurality of battery cells arranged sequentially along a first direction; the heat exchange plate structure is formed with a plurality of heat exchange channels arranged sequentially along the second direction, the plurality of heat exchange channels correspond one-to-one to the plurality of battery assemblies, and any two adjacent heat exchange channels are connected in series.

[0009] The heat exchange plate is designed to have a plurality of heat exchange channels, so that each battery cell in a battery device having a plurality of battery assemblies can also have good temperature distribution uniformity.

[0010] In some embodiments of the present application, the heat exchanger plate includes: a heat exchanger plate body and a partition assembly, the heat exchanger plate body exchanges heat with the battery cell, and a hollow cavity is provided inside the heat exchanger plate body; the partition assembly is arranged in the hollow cavity, and the partition assembly and the heat exchanger plate body together define a plurality of heat exchange channels; the partition assembly includes a partition portion and a plurality of baffle assemblies arranged in sequence along a second direction, each partition portion is used to separate two adjacent heat exchange channels, and the number of baffle assemblies is the same as the number of heat exchange channels; the baffle assembly includes a baffle extending along the second direction, each baffle is located between two adjacent flow channels of the heat exchange channel, and the baffle has opposite connecting ends and flow ends along the second direction, and the heat exchange medium flows from one side of the baffle to the other side via the flow end.

[0011] Compared with the related art in which the flow channel is too long due to manufacturing process limitations, this embodiment designs the partition assembly to include a partition portion so that two adjacent flow channels along the second direction are separated by the partition portion, which helps to shorten the flow channel to adapt to the battery cell.

[0012] In some embodiments of the present application, the heat exchanger plate body includes: an annular shell and a first plate body and a second plate body, the axis of the annular shell extends along the second direction, and the two ends of the annular shell are open along the second direction; the first plate body and the second plate body are arranged opposite to each other along the second direction, and are respectively connected to the two ends of the annular shell and together with the annular shell form a hollow cavity.

[0013] In some embodiments of the present application, when there are two baffle assemblies, each baffle assembly includes a plurality of baffles, the plurality of baffles include a first baffle and a second baffle alternately arranged along a first direction, the two first baffles belonging to different baffle assemblies are aligned and their flow ends are away from each other and their connecting ends are connected, the two second baffles belonging to different baffle assemblies are aligned and their flow ends are close to each other, and all the first baffles and the annular shell are an integral part.

[0014] By designing all the first baffles and the annular shell as an integral part, the assembly process of the first baffles and the annular shell can be omitted, which is beneficial to improving the assembly efficiency of the heat exchange plate.

[0015] In some embodiments of the present application, a connecting groove is provided at the flow end of the baffle, the connecting groove runs through the thickness of the baffle, any two adjacent flow channels on the heat exchange channel are connected through the connecting groove, and the connecting groove is an open groove, and the opening of the connecting groove faces the end face of the flow end.

[0016] In some embodiments of the present application, the wall of the connecting groove is an arc-shaped surface. This can reduce the flow resistance of the heat exchange medium when it changes direction, thereby reducing the pressure drop of the heat exchange medium in the heat exchange channel, thereby increasing the flow rate of the heat exchange medium in the heat exchange channel, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange component on the battery cell.

[0017] In some embodiments of the present application, a plurality of liquid inlets and a plurality of liquid outlets are provided on the heat exchange plate body, the upstream end of each heat exchange channel is connected to a liquid inlet, and the downstream end of each heat exchange channel is connected to a liquid outlet; the flow cross-sectional areas of the liquid inlet, the liquid outlet and the connecting groove are equal.

[0018] By designing the flow cross-sectional areas of the liquid inlet, liquid outlet and connecting groove to be consistent, the accelerated pressure drop caused by the sudden change of the cross-section at the liquid inlet, liquid outlet and connecting groove can be reduced, so that the pressure drop of the heat exchange medium in the heat exchange channel is reduced, and the flow rate of the heat exchange medium in the heat exchange channel can be increased, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange component on the battery cell.

[0019] In some embodiments of the present application, a plurality of liquid inlets and a plurality of liquid outlets are provided on the heat exchange plate body, the upstream end of each heat exchange channel is connected to a liquid inlet, and the downstream end of each heat exchange channel is connected to a liquid outlet; when a plurality of heat exchange channels are provided, the heat exchange assembly further includes a transfer tube located outside the heat exchange plate, and the inlet end and the outlet end of the transfer tube are respectively connected to two adjacent heat exchange channels.

[0020] By setting a transfer tube to connect two adjacent heat exchange channels, the inlet and outlet ends of the transfer tube can be extended to various places of the heat exchange plate body, and the liquid inlet and outlet can be flexibly adjusted according to needs, so that the two heat exchange channels can be designed to be the same or symmetrical according to needs.

[0021] In some embodiments of the present application, the partition part is an integral structure, the partition part extends from one end of the heat exchange plate body along the first direction to the other end of the heat exchange plate body along the first direction, and the partition part is located between two adjacent baffle assemblies. The partition part has high structural strength, and the partition part is installed in the heat exchange plate body in a few steps.

[0022] In some embodiments of the present application, the partition portion includes a plurality of sub-partition elements arranged in sequence along the first direction, and each flow channel is defined by the baffle, the heat exchange plate body and the sub-partition element. Each sub-partition element is installed in the heat exchange plate body, which can reduce the difficulty of installation.

[0023] In some embodiments of the present application, two adjacent sub-partition elements are tightly fitted to two opposite surfaces of the same baffle along the first direction.

[0024] In some embodiments of the present application, the sub-partition element is a flexible sealing plug. The partition part composed of the sub-partition elements can reliably seal and isolate two adjacent heat exchange channels.

[0025] In some embodiments of the present application, the flexible sealing plug includes an expansion sealing plug and a threaded fastener. The expansion sealing plug is provided with a mounting hole, the axis of the mounting hole extends along the second direction, the threaded fastener is threadedly matched with the mounting hole, and the threaded fastener can rotate under the action of external force and can drive the expansion sealing plug to expand radially outward along the mounting hole.

[0026] The expansion sealing plug in the contracted state can be easily installed in the heat exchange plate body, and the expansion sealing plug in the expanded state can cooperate for blocking, so that the partition part can reliably seal and isolate two adjacent heat exchange channels while also improving the assembly efficiency of the partition part.

[0027] In some embodiments of the present application, an annular groove or a plurality of annular grooves spaced apart along the second direction is provided on the peripheral side surface of the flexible sealing plug, and the axis of the annular groove extends along the second direction.

[0028] In some embodiments of the present application, two baffle assemblies are provided, and either sub-partition element is located in the middle of the heat exchange plate body along the second direction, or either sub-partition element is located between the middle of the heat exchange plate body along the second direction and either end of the heat exchange plate body along the second direction.

[0029] With such an arrangement, the position of the sub-partition element can be flexibly adjusted, thereby allowing the heat exchange channel to be flexibly adjusted to adapt to various battery devices and application scenarios.

[0030] In some embodiments of the present application, the first direction is parallel to the width direction of the contact surface on the battery cell used for contacting and exchanging heat with the heat exchange area, and the second direction is parallel to the length direction of the contact surface; or, the second direction is parallel to the width direction of the contact surface on the battery cell used for contacting and exchanging heat with the heat exchange area, and the first direction is parallel to the length direction of the contact surface.

[0031] In some embodiments of the present application, the number of flow channels corresponding to the heat exchange area for heat exchange with the battery monomer is an even number. In this way, the lower temperature heat exchange medium and the higher temperature heat exchange medium of each two adjacent flow channels corresponding to the heat exchange area cooperate to exchange heat with one end of the battery monomer in the second direction, and the temperature equalization effect is better.

[0032] The second aspect of the present application proposes an electrical device, comprising: any one of the battery devices proposed in the first aspect of the present application, the battery device being used to provide electrical energy.

[0033] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the cooperation between a heat exchange plate and a battery cell in the related art;

[0035] Figure 2 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0036] Figure 3 The structure diagram of a battery device according to an embodiment of the present application is schematically shown;

[0037] Figure 4 A schematic cross-sectional view of a heat exchange component according to an embodiment of the present application is shown schematically;

[0038] Figure 5 A schematic cross-sectional view of a heat exchange component according to another embodiment of the present application is shown;

[0039] Figure 6 The cross-sectional view of a heat exchange component according to another embodiment of the present application is schematically shown;

[0040] Figure 7 A schematic cross-sectional view of a heat exchange component according to another embodiment of the present application is shown schematically;

[0041] Figure 8 for Figure 5 A schematic diagram of the three-dimensional structure of the heat exchange component shown;

[0042] Fig. 9 for Figure 8 A perspective view of the heat exchange assembly shown;

[0043] Fig.10 for Figure 5 The cross-sectional schematic diagram of the heat exchange component shown along the AA direction;

[0044] Fig.11 for Figure 5 A schematic diagram of the three-dimensional structure of the second baffle of the heat exchange assembly shown;

[0045] Fig.12 for Figure 8 The heat exchange plate of the heat exchange assembly shown in the figure omits the first plate body and the second plate body;

[0046] Fig.13 for Fig.12 A front view of the heat exchange plate shown;

[0047] Fig.14 for Fig.13 The cross-sectional schematic diagram of the heat exchange plate along the BB direction is shown;

[0048] Fig.15 for Fig.13 The cross-sectional schematic diagram of the heat exchange plate along the CC direction is shown;

[0049] Fig.16 for Figure 5 Schematic diagram of the flexible sealing plug of the heat exchange assembly shown.

[0050] Description of reference numerals:

[0051] 10000, vehicles;

[0052] 1000. Battery device;

[0053] 100. battery assembly; 110. battery cell;

[0054] 200, box body; 210, first part; 220, second part;

[0055] 300, heat exchange assembly; 310, heat exchange plate; 31, heat exchange plate body; 311, annular shell; 3111, liquid inlet; 3112, liquid outlet; 312, first plate body; 313, second plate body; 314, heat exchange surface; 32, partition assembly; 321, baffle assembly; 322, baffle; 3221, first baffle; 3222, second baffle; 3223, connecting groove; 3224, arc surface; 323, partition; 3231, sub-partition element; 3232, flexible sealing plug; 3233, annular groove; 3234, expansion sealing plug; 3235, threaded fastener; 33, flow channel; 320, transfer tube; 330, input pipe; 340, output pipe;

[0056] 2000, controller;

[0057] 3000. Motor. DETAILED DESCRIPTION

[0058] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0060] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0061] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0062] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0063] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0064] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0065] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "linkage", and "fixation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0066] Figure 1 It is a schematic diagram of the cooperation between a heat exchange plate and a battery cell in the related art. As Figure 1 shown, in some related arts, eight flow channels 33 are formed in the heat exchange plate 310. The eight flow channels 33 all extend along the length direction of the heat exchange plate 310. The eight flow channels 33 are arranged in sequence along the width direction of the heat exchange plate 310 and are connected in series in sequence, and the direction in which the upstream end of any one flow channel 33 points to the downstream end is opposite to the direction in which the upstream end of an adjacent another flow channel 33 points to the downstream end. That is to say, when the heat exchange medium flows from any one flow channel 33 to an adjacent another flow channel 33, it needs to turn back. The heat exchange plate 310 is attached to two rows of battery cells 110 for heat exchange. Among them, multiple battery cells 110 in each row are arranged in sequence along the length direction of the heat exchange plate 310, and the two rows of battery cells 110 are arranged in sequence along the width direction of the heat exchange plate 310, and multiple battery cells 110 in each row straddle four adjacent flow channels 33 at the same time, so that each flow channel 33 exchanges heat with multiple battery cells 110 in the same row along its length direction at the same time.

[0067] Along the flow sequence of the heat exchange medium, the four upstream flow channels 33 are successively the first flow channel, the second flow channel, the third flow channel, and the fourth flow channel. Among them, Figure 1 the leftmost battery cell 110 in the upper row exchanges heat with the upstream end of the first flow channel, the downstream end of the second flow channel, the upstream end of the third flow channel, and the downstream end of the fourth flow channel at the same time. The flow path of the heat exchange medium entering the heat exchange plate 310 is shown by a dotted arrow. It can be Figure 1 seen that the flow path of the heat exchange medium from the upstream end of the first flow channel to the downstream end of the second flow channel is long, and during the process from the upstream end of the first flow channel to the downstream end of the first flow channel and from the upstream end of the second flow channel to the downstream end of the second flow channel, it continuously exchanges heat with other battery cells 110 in the same row. Therefore, the temperature difference between the heat exchange medium at the upstream end of the first flow channel and the heat exchange medium at the downstream end of the second flow channel is extremely large. Taking the heat exchange medium as a low-temperature medium as an example, the temperature at a << the temperature at b << the temperature at c; similarly, the temperature at c << the temperature at d << the temperature at e. Thus, Figure 1The leftmost battery cell 110 in the upper middle row has a large temperature difference between the portions corresponding to different flow channels 33. For similar reasons, the other battery cells 110 also have a large temperature difference between the portions corresponding to different flow channels 33.

[0068] In summary, the uneven temperature distribution of the battery cell can easily cause the internal resistance of the battery cell to be too high, thereby affecting the performance of the battery cell. The performance of the battery cell here refers to the performance indicators such as the charge and discharge rate and life of the battery cell.

[0069] In the present application, the heat exchange component is designed to have multiple flow channels arranged in sequence along the first direction, the flow channels extend along the second direction, the direction from the upstream end of any flow channel to the downstream end is parallel and opposite to the direction from the upstream end of another adjacent flow channel to the downstream end, and the flow direction of the heat exchange medium in any two adjacent flow channels on the heat exchange channel is opposite. And multiple flow channels exchange heat with one battery cell, which can reduce the temperature difference between the battery cell and the parts corresponding to different flow channels that exchange heat.

[0070] The battery involved in the embodiment of the present application can be used in, but not limited to, electrical equipment such as vehicles, ships or aircraft. A power supply system of the electrical equipment can be composed of the battery cells, batteries, etc. involved in the present application.

[0071] In the embodiments of the present application, the electric devices using batteries as power sources may be, but are not limited to, mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc.

[0072] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the batteries and electrical equipment described above, but can also be applied to all batteries including a box and electrical equipment using the battery. However, for the sake of simplicity, the following embodiments are described using electric vehicles as an example.

[0073] Please refer to Figure 2 , Figure 2A schematic diagram of the structure of a vehicle 10000 provided for some embodiments of the present application. The vehicle 10000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 1000 is provided inside the vehicle 10000, and the battery device 1000 may be provided at the bottom, head or tail of the vehicle 10000. The battery device 1000 may be used to power the vehicle 10000, for example, the battery device 1000 may be used as an operating power source for the vehicle 10000. The vehicle 10000 may also include a controller 2000 and a motor 3000, and the controller 2000 is used to control the battery device 1000 to power the motor 3000, for example, for the starting, navigation and working power requirements of the vehicle 10000 during driving.

[0074] In some embodiments of the present application, the battery device 1000 can not only serve as an operating power source for the vehicle 10000, but also serve as a driving power source for the vehicle 10000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 10000.

[0075] Figure 3 FIG. 1 is a schematic diagram of the structure of a battery device 1000 according to an embodiment of the present application. In some embodiments of the present application, the present application proposes a battery device 1000, such as Figure 3 As shown, a battery device 1000 (Battery Apparatus) may include one or more battery assemblies 100 for providing voltage and capacity. The battery assembly 100 (Battery Cell Assembly) may include a plurality of battery cells 110, and the plurality of battery cells 110 are connected in series, in parallel or in mixed connection through a busbar component.

[0076] In some embodiments, a battery cell assembly 100 (Battery Cell Assembly) is generally formed by arranging a plurality of battery cells 110 .

[0077] As an example, the battery assembly 100 may be a battery module, which is formed by arranging and fixing a plurality of battery cells 110 to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells 110 by a cable tie.

[0078] In some embodiments, Figure 3As shown, the battery device 1000 may be a battery pack, which includes a box 200 and one or more battery assemblies 100, and the battery assembly 100 is contained in the box 200. The box 200 may be a simple three-dimensional structure such as a single cuboid, cylinder, or sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as cuboids, cylinders, or spheres. The material of the box 200 may be an alloy material such as aluminum alloy, iron alloy, or a polymer material such as polycarbonate, polyisocyanurate foam plastic, or a composite material such as glass fiber and epoxy resin.

[0079] As an example, the battery assembly 100 may be a battery module, and the battery assembly 100 may be accommodated in the box body 200 by fixing the battery module in the box body 200 .

[0080] As an example, the battery assembly 100 may also be accommodated in the case 200 by directly fixing the plurality of battery cells 110 to the case 200 .

[0081] As an example, the box 200 may include a first part 210 and a second part 220. The first part 210 and the second part 220 are buckled together to form a closed space inside the box 200 to accommodate the battery assembly 100. The closed space here means covering or closing, which may be unsealed or sealed to prevent liquid or other foreign matter from affecting the charging or discharging of the battery cell 110. The first part 210 may be a top cover or a bottom plate.

[0082] As an example, the box body 200 may include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body 200 to accommodate the battery assembly 100.

[0083] In some embodiments, the box 200 can be used as part of the chassis structure of the vehicle 10000. For example, part of the box 200 can become at least a part of the floor of the vehicle 10000, or part of the box 200 can become at least a part of the cross beam and longitudinal beam of the vehicle 10000.

[0084] The battery cell 110 mentioned in the embodiment of the present application may be a secondary battery. A secondary battery refers to a battery cell 110 that can be continuously used by activating active materials by charging after the battery cell 110 is discharged.

[0085] The battery cell 110 may be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel metal hydride battery, a nickel cadmium battery, a lead storage battery, etc., and the embodiments of the present application do not limit this. As an example, the battery cell 110 may be a cylindrical battery cell, a prismatic battery cell, a soft pack battery cell, or a battery cell 110 of other shapes, and the prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, and a multi-prismatic battery cell, and the multi-prismatic battery cell is, for example, a hexagonal battery cell, etc., and the present application has no special restrictions.

[0086] The battery cell 110 mentioned in the embodiment of the present application includes a housing, an electrode assembly and an electrolyte, wherein the electrode assembly is accommodated in the housing. As an example, the electrolyte may be in a liquid state, a gel state or a solid state.

[0087] As an example, the housing may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing) or an aluminum-plastic film. In some embodiments, the housing may be a sealed structure or a non-sealed structure. As an example, when the housing is a non-sealed structure, the housing plays a role in protecting the electrode assembly, and a sealed bag is further included between the housing and the electrode assembly, and the sealed bag is used to encapsulate the electrode assembly and the electrolyte. Specifically, the sealed bag may be a bag-shaped insulating member or an aluminum-plastic film. When the housing is a sealed structure, it is used to encapsulate components such as the electrode assembly and the electrolyte.

[0088] In some embodiments, the housing may include an end cap and a shell, the shell having an opening, the electrode assembly being loaded into the shell from the opening, and the end cap being disposed on the opening. The shell may have one or more openings. One or more end caps may also be provided.

[0089] The electrode assembly is composed of a cathode electrode sheet, an anode electrode sheet and a separator. The battery cell 110 mainly works by the movement of metal ions between the cathode electrode sheet and the anode electrode sheet. The cathode electrode sheet includes a cathode current collector and a cathode active material layer. The cathode active material layer is coated on the surface of the cathode current collector. The cathode current collector not coated with the cathode active material layer protrudes from the cathode current collector coated with the cathode active material layer. The cathode current collector not coated with the cathode active material layer serves as a cathode tab. Taking a lithium-ion battery as an example, the material of the cathode current collector may be aluminum, and the cathode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The anode electrode sheet includes an anode current collector and an anode active material layer. The anode active material layer is coated on the surface of the anode current collector. The anode current collector not coated with the anode active material layer protrudes from the anode current collector coated with the anode active material layer. The anode current collector not coated with the anode active material layer serves as an anode tab. The material of the anode current collector may be copper, and the anode active material may be carbon or silicon, etc. In order to ensure that a large current can pass without melting, the number of cathode tabs is multiple and stacked together, and the number of anode tabs is multiple and stacked together. The material of the isolation film can be polypropylene (PP) or polyethylene (PE). In addition, the electrode assembly can be a winding structure or a laminated structure, and the embodiments of the present application are not limited thereto.

[0090] The battery device 1000 mentioned in the embodiment of the present application also includes a heat exchange component 300, such as Figures 4 to 8 As shown, the heat exchange assembly 300 includes a heat exchange plate 310, and one side of the heat exchange plate 310 along the thickness direction is a heat exchange surface 314, and the heat exchange surface 314 is used for heat exchange with the battery cell 110. The heat exchange method between the heat exchange surface 314 and the battery cell 110 can be heat conduction, that is, the heat exchange surface 314 is in direct contact with the battery cell 110, and the heat of the higher temperature one of the two is conducted to the other. Alternatively, the heat exchange method between the heat exchange surface 314 and the battery cell 110 can be heat radiation, that is, the heat exchange surface 314 is close to the battery cell 110 but not in direct contact, for example, an intermediate medium is provided between the heat exchange surface 314 and the battery cell 110.

[0091] A plurality of flow channels 33 are arranged in sequence along the first direction, and the plurality of flow channels 33 are connected in series in sequence to form a heat exchange channel, and the heat exchange channel is used for the flow of heat exchange medium. The flow channel 33 extends along the second direction, and the direction from the upstream end of any flow channel 33 to the downstream end is parallel and opposite to the direction from the upstream end of another adjacent flow channel 33 to the downstream end, and the flow direction of the heat exchange medium in any two adjacent flow channels 33 on the heat exchange channel is opposite. In this way, the heat exchange medium needs to turn back when flowing from any flow channel 33 to another adjacent flow channel 33. Among them, the first direction and the second direction intersect, which means that the first direction and the second direction do not overlap. The first direction and the second direction can be orthogonal, that is, the first direction and the second direction are perpendicular to each other. Alternatively, the first direction and the second direction intersect and are not perpendicular, that is, they are arranged to intersect at an acute angle or an obtuse angle. In the various drawings of the embodiments of the present application, the first direction is shown as X and the second direction is shown as Y.

[0092] The orthographic projections of at least two adjacent flow channels 33 on the heat exchange channel on the heat exchange surface 314 form a heat exchange area, and each heat exchange area is used for heat exchange with a battery cell 110. In other words, N adjacent flow channels 33 on the same heat exchange channel exchange heat with a battery cell 110, where N is a positive integer greater than or equal to 2. Accordingly, the heat exchange medium needs to make N-1 turns to flow through the N flow channels 33 corresponding to the heat exchange area in sequence.

[0093] For example, see Figure 4 The heat exchange area can be the positive projection area of ​​two adjacent flow channels 33 on the heat exchange surface 314, that is, the heat exchange medium in the two flow channels 33 exchanges heat with a battery cell 110. For another example, please refer to Figure 6 The heat exchange area may be the orthographic projection area of ​​three adjacent flow channels 33 on the heat exchange surface 314 , that is, the heat exchange medium in the three flow channels 33 exchanges heat with one battery cell 110 .

[0094] The heat exchange assembly 300 can be located below the battery assembly 100, exchanging heat with the bottom of the battery cell 110, in which case the orthographic projection of the bottom surface of the battery cell 110 on the heat exchange surface 314 at least partially overlaps with the heat exchange area. Alternatively, the heat exchange assembly 300 can be located above the battery assembly 100, exchanging heat with the top of the battery cell 110, in which case the orthographic projection of the top surface of the battery cell 110 on the heat exchange surface 314 at least partially overlaps with the heat exchange area. Alternatively, the heat exchange assembly 300 can be located between two adjacent battery assemblies 100, exchanging heat close to the side of the battery cell 110, in which case the orthographic projection of the side of the battery cell 110 on the heat exchange surface 314 at least partially overlaps with the heat exchange area.

[0095] The heat exchange medium may be, but is not limited to, water, ethylene glycol, etc. The heat exchange medium may be a low-temperature medium to cool the battery cell 110 . Alternatively, the heat exchange medium may be a high-temperature medium to heat the battery cell 110 .

[0096] In the present application, thanks to the orthographic projection of at least two adjacent flow channels 33 on the heat exchange channel on the heat exchange surface 314 to form a heat exchange area, each heat exchange area exchanges heat with a battery cell 110. In this way, on the one hand, each flow channel 33 corresponds to only one battery cell 110 along its length direction, and the heat exchange medium does not correspond to other battery cells 110 during the process of sequentially flowing along the multiple flow channels 33 corresponding to the heat exchange area, so the heat exchanged between the heat exchange medium and other battery cells 110 is greatly reduced, and the temperature change of the heat exchange medium when it flows from one flow channel 33 corresponding to the heat exchange area to another adjacent flow channel 33 is small, so the temperature difference of the heat exchange medium in the multiple flow channels 33 corresponding to the heat exchange area is small, which can make the temperature difference between the battery cell 110 and the parts corresponding to different flow channels 33 for heat exchange small. On the other hand, the adjacent multiple flow channels 33 cooperate with each other to adjust the temperature of a battery cell 110. Combined with the opposite flow directions of the heat exchange medium in the two adjacent flow channels 33, the heat exchange medium undergoes at least one turnback during the flow along the multiple flow channels 33 corresponding to the heat exchange area, so that the two ends of the battery cell 110 along the second direction (i.e., the length direction of the flow channel 33) at least cooperate with the upstream end of the previous flow channel 33 and the downstream end of the next flow channel 33 in the two adjacent flow channels 33 for heat exchange at the same time, so that the lower temperature heat exchange medium and the higher temperature heat exchange medium can be balanced, so that the temperature difference at the two ends of the battery cell 110 along the length direction of the flow channel 33 is reduced.

[0097] Combining the above two aspects, the heat exchange component 300 can improve the temperature uniformity effect on each battery cell 110, reduce the temperature difference of the battery cell 110, and help improve the uniformity of temperature distribution of each battery cell 110, thereby reducing the negative impact of poor temperature distribution uniformity of the battery cell 110 on its internal resistance, thereby helping to improve the performance of the battery cell 110.

[0098] In some embodiments of the present application, the heat exchange plate 310 is configured such that the number of heat exchange channels is equal to the number of battery assemblies 100, and each heat exchange channel can exchange heat with a corresponding battery assembly 100 to adjust the temperature of the corresponding battery assembly 100. The battery assembly 100 includes a battery cell 110 or a plurality of battery cells 110 arranged in sequence along a first direction.

[0099] As an example, the battery device 1000 includes a battery assembly 100, and a plurality of battery cells 110 included in the battery assembly 100 are arranged in sequence along a first direction. Figure 4As shown, the heat exchange plate 310 is structured to form a heat exchange channel. That is, the heat exchange assembly 300 of this embodiment is suitable for a battery device 1000 having a battery assembly 100. Figure 4 In the specific example shown, the orthographic projection of the two flow channels 33 on the heat exchange surface 314 forms a heat exchange area, that is, the two flow channels 33 exchange heat with a battery cell 110. The heat exchange medium flows in sequence along the two flow channels 33 corresponding to the heat exchange area, and the flow path of the heat exchange medium is shown by the dotted hollow arrows. Specifically, the heat exchange medium flows along the second direction from the upstream end of the previous flow channel 33 in the two flow channels 33 to the downstream end of the previous flow channel 33, and after a turn, it flows from the upstream end of the latter flow channel 33 in the two flow channels 33 to the downstream end of the latter flow channel 33 along the second direction. Taking the heat exchange medium as a low-temperature medium as an example, the temperature of the heat exchange medium gradually rises during this process, and the temperature T1 of the heat exchange medium at the upstream end of the previous flow channel 33 is less than the temperature T2 of the heat exchange medium at the downstream end of the previous flow channel 33 and the temperature T3 of the heat exchange medium at the downstream end of the subsequent flow channel 33. In this way, the heat exchange medium with a lower temperature (i.e., T1) at the upstream end of the previous flow channel 33 and the heat exchange medium with a higher temperature (i.e., T3) at the downstream end of the subsequent flow channel 33 cooperate to exchange heat with one end of the battery cell 110 in the second direction, and the heat exchange medium with an intermediate temperature at the downstream end of the previous flow channel 33 exchanges heat with the other end of the battery cell 110 in the second direction, so that the temperatures of the two ends of the battery cell 110 along the second direction are well balanced.

[0100] As an example, the battery device 1000 includes a plurality of battery assemblies 100 arranged in sequence along the second direction, and the heat exchange plate 310 is constructed to form a plurality of heat exchange channels arranged in sequence along the second direction, the plurality of heat exchange channels correspond one-to-one to the plurality of battery assemblies 100, and any two adjacent heat exchange channels are connected in series.

[0101] When the battery device 1000 includes two battery assemblies 100 arranged in sequence along the second direction, Figure 5 and Figure 6 As shown, the heat exchange plate 310 is structured to form two heat exchange channels arranged in sequence along the second direction, and the two heat exchange channels are connected in series, that is, the downstream end of the previous heat exchange channel is connected to the upstream end of the next heat exchange channel. In other words, the heat exchange assembly 300 of this embodiment is suitable for a battery device 1000 having two battery assemblies 100. The heat exchange medium flows in sequence along the two heat exchange channels, and the flow path of the heat exchange medium is shown by a dotted hollow arrow. According to Figure 6In the specific example shown, the orthographic projections of the three flow channels 33 on the heat exchange surface 314 form a heat exchange area, that is, the three flow channels 33 exchange heat with one battery cell 110. Specifically, along the flow sequence of the heat exchange medium, the three flow channels 33 are the first flow channel 33, the middle flow channel 33 and the last flow channel 33, the upstream end of the first flow channel 33, the downstream end of the middle flow channel 33 and the upstream end of the last flow channel 33 cooperate to exchange heat with one end of the battery cell 110 in the second direction, and the downstream end of the first flow channel 33, the upstream end of the middle flow channel 33 and the downstream end of the last flow channel 33 cooperate to exchange heat with the other end of the battery cell 110 in the second direction.

[0102] When the battery device 1000 includes three battery assemblies 100 arranged in sequence along the second direction, as shown in FIG. Figure 7 As shown, the heat exchange plate 310 is correspondingly structured to form three heat exchange channels arranged in sequence along the second direction, and the three heat exchange channels are connected in series. That is to say, the heat exchange assembly 300 of this embodiment is suitable for a battery device 1000 having three battery assemblies 100. The heat exchange medium flows in sequence along the three heat exchange channels, and the flow path of the heat exchange medium is shown by a dotted hollow arrow.

[0103] By designing the heat exchange plate 310, a plurality of heat exchange channels can be constructed so that in a battery device 1000 having a plurality of battery assemblies 100, the plurality of battery assemblies 100 can perform heat exchange with the plurality of heat exchange channels one by one, so that each battery assembly 100 can have good temperature distribution uniformity.

[0104] Taking the heat exchange surface 314 and the battery cell 110 for heat exchange by heat conduction as an example, the battery cell 110 has a contact surface for contacting and exchanging heat with the heat exchange surface 314. In order to enable those skilled in the art to better understand the technical solution of the present application, in the embodiment of the present application, the battery cell 110 is in the shape of a rectangular parallelepiped, and the heat exchange assembly 300 exchanges heat with the rectangular battery cell 110 as an example, and accordingly, the shape of the contact surface is a rectangle. It can be understood that regardless of whether the heat exchange assembly 300 is located below, above or around the battery assembly 100, one of the first direction and the second direction can be parallel to the length direction of the rectangular contact surface, and the other can be parallel to the width direction of the contact surface.

[0105] In some embodiments, the first direction is parallel to the length direction of the contact surface, and the second direction is parallel to the width direction of the contact surface, that is, the flow channel 33 extends along the width direction of the contact surface. Figure 4 As shown, the first direction is parallel to the width direction of the contact surface, and the second direction is parallel to the length direction of the contact surface, that is, the flow channel 33 extends along the length direction of the contact surface.

[0106] When parameters such as the size of the battery cell 110, the size of the contact surface, and the area of ​​the heat exchange region are all consistent, in an implementation scheme where the second direction is parallel to the length direction of the contact surface, since the extension direction of the flow channel 33 is parallel to the length direction of the contact surface, the length of the flow channel 33 is longer, and the number of flow channels 33 corresponding to the heat exchange region is small, so that the number of times the heat exchange medium returns is small, which can reduce the impact of the decrease in flow velocity caused by the change in flow direction on the heat exchange medium, and enable the heat exchange medium to flow faster along the multiple flow channels 33 corresponding to the heat exchange region in sequence, so as to improve the heat exchange efficiency.

[0107] In the heat exchange assembly 300 disclosed herein, there are various embodiments for configuring the heat exchange plates 310 to form heat exchange channels.

[0108] In some embodiments, the heat exchange plate 310 may be implemented by a single-sided buried tube process, a double-sided clamped tube process, etc. Taking the double-sided clamped tube process as an example, the structure of the heat exchange plate 310 may be implemented as including two opposite and parallel substrates and a heat exchange tube group located between the two substrates, the heat exchange tube group, for example, including a plurality of U-shaped tubes sequentially arranged along a first direction, the plurality of U-shaped tubes are connected in series, the openings of two adjacent U-shaped tubes face opposite directions, the straight section of each U-shaped tube extends along a second direction, and the straight section of the U-shaped tube may be regarded as a flow channel 33.

[0109] In some embodiments of this application, please combine Figures 5 to 9 The structure of the heat exchange plate 310 can also be implemented as including a heat exchange plate body 31 and a partition assembly 32. The heat exchange plate body 31 is used for heat exchange with the battery cell 110, that is, the heat exchange plate body 31 has a heat exchange surface 314. The heat exchange plate body 31 is an internal hollow structure, that is, a hollow cavity is provided inside the heat exchange plate body 31, and the partition assembly 32 is arranged in the hollow cavity and defines all flow channels 33 together with the heat exchange plate body 31.

[0110] The heat exchange plate body 31 can be made of a material with high thermal conductivity such as aluminum or copper, so that the heat exchange plate body 31 can reliably transfer heat between the battery cell 110 and the heat exchange medium. Aluminum also has the advantage of being light in weight. When the heat exchange plate body 31 is made of aluminum, the heat exchange assembly 300 can also be lightweight.

[0111] In the embodiment of the heat exchange plate 310 using the double-sided tube clamping process, the intermediate medium for heat transfer between the battery cell 110 and the heat exchange medium includes the heat exchange tube group and the substrate. In this embodiment, the intermediate medium for heat transfer between the battery cell 110 and the heat exchange medium is the heat exchange plate body 31. It can be seen that the number of intermediate media is reduced, the heat transfer links are reduced, which is conducive to reducing heat loss in the heat transfer process, and further conducive to improving the heat exchange effect.

[0112] As disclosed herein, the heat exchange assembly 300 has various specific structures of the heat exchange plate body 31 according to different manufacturing and processing methods. Figures 5 to 10 As shown, the heat exchange plate body 31 may include an annular shell 311, and a first plate 312 and a second plate 313 connected to the annular shell 311. The axis of the annular shell 311 extends along the second direction, and the two ends of the annular shell 311 along the second direction are open. The first plate 312 and the second plate 313 respectively block the two ends of the annular shell 311 along the second direction, and the first plate 312, the second plate 313 and the annular shell 311 are enclosed together to form a hollow cavity. Among them, the connection method of the first plate 312 and the second plate 313 with the annular shell 311 can be selected from any one or more of welding, screw connection, clamping, and bonding. As an alternative example, the heat exchange plate body 31 may include a box body and a top cover, and the box body is open on one side along the thickness direction (shown as Z) of the heat exchange plate body 31 to form an opening, and the top cover covers the opening of the box body to enclose and form a hollow cavity.

[0113] Understandable, such as Figures 4 to 7 As shown, a liquid inlet 3111 and a liquid outlet 3112 are provided on the heat exchange plate body 31, and the number of the liquid inlet 3111 and the liquid outlet 3112 is equal to the number of the heat exchange channels. The upstream end of each heat exchange channel is connected to a liquid inlet 3111, and the downstream end of each heat exchange channel is connected to a liquid outlet 3112, so that the heat exchange medium can pass into the heat exchange channel through the liquid inlet 3111, and the heat exchange medium after heat exchange can be discharged from the liquid outlet 3112.

[0114] <Structure and manufacturing method of heat exchange plate 310 having one heat exchange channel>

[0115] In the embodiment where the heat exchange plate 310 is configured to form a heat exchange channel, Figure 4 As shown, the partition assembly may specifically include a baffle assembly 321 .

[0116] The baffle assembly 321 may specifically include N-1 baffles 322, each of which extends along the second direction, and each of which is located between two adjacent flow channels 33 of the heat exchange channel. The baffle 322 has a connection end and a flow end opposite to the connection end along the second direction, and the connection end refers to the end of the baffle 322 for connection, and the heat exchange medium can flow from one side of the baffle 322 through the flow end of the baffle 322 to the other side of the baffle 322. When N≥3, the number of baffles 322 is greater than or equal to 2, and the multiple baffles 322 are arranged in sequence along the first direction. Specifically, as Figure 4 As shown, the multiple baffles 322 include first baffles 3221 and second baffles 3222 alternately arranged along the first direction, and the flow end of the first baffle 3221 and the flow end of the second baffle 3222 are away from each other, so that the heat exchange medium is turned back once when flowing through each baffle 322.

[0117] It should be noted that the specific implementation methods of configuring the baffle 322 to allow the heat exchange medium to flow through the flow end include but are not limited to the following possibilities.

[0118] As a possibility, the length of the baffle 322 along the second direction is smaller than the length of the flow channel 33 .

[0119] As another possibility, Figure 5 , Figures 9 to 11 As shown, the flow end of the baffle 322 is provided with a connecting groove 3223 that runs through its thickness, that is, the connecting groove 3223 is a through hole, and the flow channels 33 on both sides of the baffle 322 are connected through the connecting groove 3223, and the heat exchange medium on one side of the baffle 322 flows to the other side of the baffle 322 via the connecting groove 3223.

[0120] The connecting groove 3223 may be a closed groove, that is, the minimum vertical distance between the groove wall of the connecting groove 3223 and the end surface of the flow-through end of the baffle 322 is greater than 0 mm, and there is a gap between the connecting groove 3223 and the end surface of the flow-through end of the baffle 322. When the connecting groove 3223 is a closed groove, the shape of the connecting groove 3223 may be any one of circular, rectangular, oblong, and elliptical.

[0121] Or, if Figures 9 to 11 As shown, the connecting groove 3223 can also be an open groove, and the opening of the connecting groove 3223 faces the end surface of the flow end of the baffle 322. At this time, the connecting groove 3223 can be regarded as a concave end surface of the flow end of the baffle 322. When the connecting groove 3223 is an open groove, the groove wall of the connecting groove 3223 can further be an arc surface 3224. Here, the connecting groove 3223 can be a part of a circular hole (for example, a semicircular hole), and the flow path of the heat exchange medium along two adjacent flow channels 33 is U-shaped. By designing the groove wall of the connecting groove 3223 as an arc surface 3224, the flow resistance of the heat exchange medium when reversing can be reduced, and the pressure drop of the heat exchange medium in the heat exchange channel can be reduced, thereby increasing the flow rate of the heat exchange medium in the heat exchange channel, so that the heat exchange efficiency and heat exchange effect of the heat exchange component 300 on the battery cell 110 can be improved.

[0122] In the embodiment where a connecting groove 3223 connecting two adjacent flow channels 33 is provided at the flow end of the baffle 322, the flow cross-sectional areas of the liquid inlet 3111, the liquid outlet 3112 and the connecting groove 3223 can also be configured to be equal. By designing the flow cross-sectional areas of the liquid inlet 3111, the liquid outlet 3112 and the connecting groove 3223 to be consistent, the accelerated pressure drop caused by the sudden change of the cross section at the liquid inlet 3111, the liquid outlet 3112 and the connecting groove 3223 can be reduced, and the pressure drop of the heat exchange medium in the heat exchange channel can be reduced, thereby increasing the flow rate of the heat exchange medium in the heat exchange channel, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly 300 on the battery cell 110.

[0123] Understandable, Figure 4 An exemplary manufacturing method of the heat exchange plate 310 shown is as follows: step 11, using an extrusion molding process to integrally mold the annular shell 311 and the baffle assembly 321; step 12, welding the first plate body 312 to the open end of the annular shell 311, so that the first plate body 312 blocks the open end of the annular shell 311; step 13, welding the second plate body 313 to the other open end of the annular shell 311, so that the second plate body 313 blocks the other open end of the annular shell 311. It should be noted that in this example, when a connecting groove 3223 is provided at the flow end of the baffle 322, the connecting groove 3223 needs to be an open groove so that demolding can be performed after the integral molding process is completed. It should be noted that step 11 can also be replaced by an integral molding process such as forging, casting, stamping, injection molding, etc.

[0124] Figure 4 Another exemplary manufacturing method of the heat exchange plate 310 shown is: step 21, using an extrusion molding process to form an annular shell 311; step 22, connecting each first baffle 3221 with the first plate body 312 as a whole, and then moving the whole so that the first baffle 3221 extends from the open end of the annular shell 311 into the annular shell 311, and the first plate body 312 is connected to the open end of the annular shell 311; step 23, connecting each second baffle 3222 with the second plate body 313 as a whole, and then moving the whole so that the second baffle 3222 extends from the other open end of the annular shell 311 into the annular shell 311, and the second plate body 313 is connected to the other open end of the annular shell 311.

[0125] In contrast, when the heat exchange plate 310 is prepared using steps 11 to 13, the baffle assembly 321 and the annular shell 311 are integrated, which can save the process of installing the baffle assembly 321 into the annular shell 311, thereby improving assembly efficiency. When the heat exchange plate 310 is prepared using steps 21 to 23, when the flow-through end of the baffle 322 is provided with a connecting groove 3223, the connecting groove 3223 can be a closed groove.

[0126] <Structure and manufacturing method of the heat exchange plate 310 having two heat exchange channels>

[0127] The structure of the heat exchange plate 310 with two heat exchange channels is similar to the structure of the heat exchange plate 310 with one heat exchange channel described above, except that: Figure 4 The partition assembly of the heat exchange plate 310 having a heat exchange channel shown in FIG. 1 includes a baffle assembly 321. In this embodiment, as shown in FIG. Figure 5 , Figure 6 , Figure 8 as well as Fig. 9As shown, the partition assembly and the heat exchange plate body 31 together define two heat exchange channels. The partition assembly may specifically include a partition portion 323 and two baffle assemblies 321 sequentially arranged along the second direction.

[0128] In this example, the baffle assembly 321 includes a plurality of baffles 322, and the plurality of baffles 322 include a first baffle 3221 and a second baffle 3222 alternately arranged along a first direction, the flow-through end of the first baffle 3221 faces outside the hollow cavity, and the flow-through end of the second baffle 3222 faces the partition portion 323. That is, the flow-through ends of the first baffles 3221 of the two baffle assemblies 321 are away from each other, and the flow-through ends of the second baffles 3222 of the two baffle assemblies 321 are close to each other.

[0129] As an example, Figure 6 As shown, a first baffle 3221 and a second baffle 3222 belonging to different baffle assemblies 321 can be aligned, and the two heat exchange channels can be symmetrical about the partition portion 323. In some embodiments of the present application, please combine Figure 6 As shown, the partition part 323 can be an integral structure, and the partition part 323 extends from one end of the heat exchange plate body 31 along the first direction to the other end of the heat exchange plate body 31 along the first direction. At this time, the partition part 323 is located between the two baffle assemblies 321. In other words, the two baffle assemblies 321 are located on different sides of the partition part 323, so that the two baffle assemblies 321 are separated by the partition part 323 and do not contact. The partition part 323 can be specifically implemented as a plate-shaped structure or a block-shaped structure.

[0130] Figure 6 An exemplary manufacturing method of the heat exchange plate 310 shown is: step 31, using an extrusion molding process to form an annular shell 311; step 32, connecting all first baffles 3221 and the partition part 323 as a whole; step 33, moving the whole made in step 32 from the open end of the annular shell 311 into the annular shell 311; step 34, connecting the second baffles 3222 of the two baffle assemblies 321 to the first plate body 312 and the second plate body 313 respectively, welding the first plate body 312 to the open end of the annular shell 311, and welding the second plate body 313 to the other open end of the annular shell 311.

[0131] As an example, Figure 5 , Fig. 9 , Figures 12 to 15As shown, two second baffles 3222 belonging to different baffle assemblies 321 can be aligned, two first baffles 3221 belonging to different baffle assemblies 321 can be aligned and the connecting ends of the two are connected, and all first baffles 3221 and the annular shell 311 are an integral part. By integrally forming the annular shell 311 and the first baffle 3221, the assembly process of the first baffle 3221 and the annular shell 311 can be omitted, which is conducive to improving the assembly efficiency of the heat exchange plate 310. Without increasing the cost, it is also conducive to improving the connection reliability between the annular shell 311 and the first baffle 3221.

[0132] In some embodiments of the present application, Figure 5 and Fig. 9 As shown, the partition part 323 can be a split structure, and the partition part 323 can specifically include a plurality of sub-partition elements 3231 arranged in sequence along the first direction, and the second baffles 3222 of the two baffle assemblies 321 are located on different sides of the partition part 323, and the two first baffles 3221 belonging to different baffle assemblies 321 can be aligned and the connecting ends of the two can be connected to separate two adjacent sub-partition elements 3231, so that the two adjacent sub-partition elements 3231 are tightly fitted with the two opposite sides of the same first baffle 3221 along the first direction, so that each flow channel 33 is defined and formed by the baffle 322, the heat exchange plate body 31 and the sub-partition element 3231. Here, the number of sub-partition elements 3231 is related to the number of first baffles 3221. For example, according to Figure 5 and Fig. 9 As shown, the two baffle assemblies 321 each include 14 first baffles 3221, the 14 first baffles 3221 of the two baffle assemblies 321 are aligned one by one, and the connecting ends of the two first baffles 3221 belonging to different baffle assemblies 321 are connected, so the sub-partition elements 3231 are correspondingly provided with 15.

[0133] Alternatively, in the case where the partition portion 323 is a split structure, any two adjacent sub-partition elements 3231 are not limited to being tightly fitted on the two sides opposite to the first baffle plate 3221 along the first direction, and the two adjacent sub-partition elements 3231 may also be tightly fitted, that is, the two adjacent sub-partition elements 3231 are in direct contact without being separated by the first baffle plate 3221.

[0134] In contrast, in an example where two adjacent sub-partition elements 3231 are tightly fitted with the two opposite sides of the same first baffle plate 3221 along the first direction, during manufacturing, the first baffle plate 3221 can be installed first, and then each sub-partition element 3231 can be installed. At this time, the first baffle plate 3221 can be used as an installation reference for the sub-partition element 3231 to facilitate accurate installation of the sub-partition element 3231.

[0135] Figure 5 and Fig. 9An exemplary manufacturing method of the heat exchange plate 310 shown in the figure is as follows: Step 41, the annular shell 311 and the first baffle 3221 are integrally formed by an extrusion molding process to form Figure 12 to Figure 14 The one-piece shown; Step 42, install multiple sub-partition elements 3231 into the annular shell 311 from the open end of the annular shell 311 in sequence, so that any two adjacent sub-partition elements 3231 are tightly fitted with the two opposite sides of a first baffle 3221 along the first direction; Step 43, connect the second baffles 3222 of the two baffle assemblies 321 to the first plate body 312 and the second plate body 313 respectively, weld the first plate body 312 to the open end of the annular shell 311, and weld the second plate body 313 to the other open end of the annular shell 311. Here, step 41 can also be replaced by using an integrated molding process such as forging, casting, stamping, injection molding, etc. to make the annular shell 311 and the first baffle 3221 into an integral piece.

[0136] Of course, in other examples of the present application, the baffles 322 of the two baffle assemblies 321 may also be staggered with each other.

[0137] Based on the above description, it can be known that the partition part 323 can be an integral structure or a split structure composed of multiple sub-partition elements 3231. In contrast, when the partition part 323 is an integral structure, the structural strength of the partition part 323 is high, and the partition part 323 has fewer steps for installing the partition part 323 into the heat exchange plate body 31. When the partition part 323 is a split structure, each sub-partition element 3231 is installed into the heat exchange plate body 31, which can reduce the difficulty of installation.

[0138] When the partition portion 323 is a split structure, the plurality of sub-partition elements 3231 constituting the partition portion 323 may be rigid parts made of materials such as metal and ceramic.

[0139] In some embodiments of the present application, the sub-partition element 3231 may be a flexible sealing plug 3232. The flexible sealing plug 3232 may be a component having a flexible structure, and the material of the flexible sealing plug 3232 may be any one of rubber, plastic, and the like. Since the flexible sealing plug 3232 has good flexible deformation capability, the partition portion 323 composed of each sub-partition element 3231 can reliably seal and isolate two adjacent heat exchange channels. Moreover, by extruding and deforming the sub-partition element 3231, the sub-partition element 3231 can be installed in the heat exchange plate body 31.

[0140] For example, Fig.14As shown, when all the first baffles 3221 and the annular housing 311 are integrally formed as one piece, two adjacent first baffles 3221 and the annular housing 311 define a passage, and the sub-partition element 3231 can be interference-fitted with a portion of the passage. The sub-partition element 3231 is further equipped with a flexible sealing plug 3232, and the sub-partition element 3231 can be squeezed and deformed and installed in the passage to block the passage.

[0141] Further optional embodiments, such as Fig.16 As shown, the flexible sealing plug 3232 may include an expansion sealing plug 3234 and a threaded fastener 3235. The expansion sealing plug 3234 is provided with a mounting hole, the axis of the mounting hole extends along the second direction, the threaded fastener 3235 is threadedly matched with the mounting hole, and the threaded fastener 3235 can rotate under the action of external force and can drive the expansion sealing plug 3234 to expand radially outward along the mounting hole.

[0142] Among them, the expansion sealing plug 3234 has a contracted state and an expanded state, and the threaded fastener 3235 can refer to a screw, a bolt, etc.

[0143] In this example, Fig. 9 In the manufacturing method of the heat exchange plate 310 shown, the above step 42 is specifically: install each flexible sealing plug 3232 in sequence; wherein, the installation process of each flexible sealing plug 3232 is: step 421, the expansion sealing plug 3234 of the flexible sealing plug 3232 is in a contracted state, and the flexible sealing plug 3232 is moved from the open end of the annular shell 311 into a passage in the annular shell 311; step 422, insert a tool into the annular shell 311 from the open end of the annular shell 311, and use the tool and the threaded fastener 3235 to apply an external force to the threaded fastener 3235, so that the threaded fastener 3235 rotates, thereby driving the expansion sealing plug 3234 to expand radially outward along the installation hole, until the expansion sealing plug 3234 in the expanded state matches the corresponding passage to block the passage. Depending on the different threaded fasteners 3235, the tools here may also be different. For example, when the threaded fastener 3235 is a slotted screw, the tool refers to a slotted screwdriver; for example, when the threaded fastener 3235 is a cross screw, the tool refers to a cross screwdriver.

[0144] By designing the flexible sealing plug 3232 to include an expansion sealing plug 3234 and a threaded fastener 3235, the threaded fastener 3235 rotates under force to drive the expansion sealing plug 3234 to expand, so that the expansion sealing plug 3234 can be switched from a contracted state to an expanded state. In this way, the expansion sealing plug 3234 in the contracted state can be easily installed in the heat exchange plate body 31, and the expansion sealing plug 3234 in the expanded state can cooperate to perform plugging, so that the partition part 323 can reliably seal and isolate two adjacent heat exchange channels, while also improving the assembly efficiency of the partition part 323.

[0145] In some embodiments of this application, please continue to refer to Fig.16 An annular groove 3233 or a plurality of annular grooves 3233 spaced apart along the second direction may also be provided on the peripheral side surface of the flexible sealing plug 3232, and the axis of the annular groove 3233 extends along the second direction.

[0146] In the embodiment where the partition portion 323 is composed of a plurality of sub-partition elements 3231, the positions of the sub-partition elements 3231 in the heat exchange plate body 31 are varied. For example, the sub-partition elements 3231 may be located in the middle of the heat exchange plate body 31 along the second direction. When each sub-partition element 3231 is located in the middle of the heat exchange plate body 31, the flow channels 33 of the two heat exchange channels have the same length, and the structures of the two heat exchange channels may be completely consistent (e.g., Figure 6 ) or symmetrically about the partition portion 323 (as shown Figure 5 and Fig. 9 As another example, the sub-partition element 3231 may also be located between the middle of the heat exchange plate body 31 along the second direction and any end of the heat exchange plate body 31 along the second direction, that is, the sub-partition element 3231 deviates from the middle of the heat exchange plate body 31 along the second direction.

[0147] With such a configuration, the position of the sub-partition element 3231 can be flexibly adjusted, and the heat exchange channels can be flexibly combined and adjusted to adapt to various types of battery devices 1000 and application scenarios. For example, when the battery device 1000 with the heat exchange assembly 300 is used in a vehicle 10000, one of the heat exchange channels is close to the heat source of the vehicle 10000, and the other heat exchange channel is far away from the heat source, then the sub-partition elements 3231 of the heat exchange assembly 300 can deviate from the middle of the heat exchange plate body 31, so that the length of the flow channel 33 of one of the heat exchange channels close to the heat source is less than the length of the flow channel 33 of the other heat exchange channel, and the heat exchange rate of one of the heat exchange channels close to the heat source is improved.

[0148] In order to connect the two heat exchange channels in series, as a feasible example, a through hole may be provided on the partition portion 323, and the heat exchange medium in the last flow channel 33 of the previous heat exchange channel enters the first flow channel 33 of the next heat exchange channel through the through hole. In this example, a liquid inlet 3111 and a liquid outlet 3112 may be provided on the heat exchange plate body 31, the upstream end of the previous heat exchange channel is connected to the liquid inlet 3111, and the downstream end of the next heat exchange channel is connected to the liquid outlet 3112.

[0149] As an alternative example, Figure 5 , Fig. 9 and Fig.12As shown, the heat exchange plate body 31 may be provided with two liquid inlets 3111 and two liquid outlets 3112 , the upstream end of each heat exchange channel is connected to a liquid inlet 3111 , and the downstream end of each heat exchange channel is connected to a liquid outlet 3112 .

[0150] In this embodiment, Figure 7 and Fig. 9 As shown, the heat exchange assembly 300 may also include a transfer tube 320 located outside the heat exchange plate 310, the inlet end of the transfer tube 320 is connected to a liquid outlet 3112, and the outlet end is connected to a liquid inlet 3111, so that the two heat exchange channels are connected in series. By using the transfer tube 320 for connection, the inlet end of the transfer tube 320 can be extended to various places of the heat exchange plate body 31 to connect with the liquid outlet 3112. Similarly, the outlet end of the transfer tube 320 can be extended to various places of the heat exchange plate body 31 to connect with the liquid inlet 3111. Then, the positions of the liquid outlet 3112 and the liquid inlet 3111 can be flexibly adjusted according to needs, so that the two heat exchange channels can be designed to be the same or symmetrical about the partition part 323. As a result, the design of the heat exchange plate 310 and the heat exchange channel is more flexible.

[0151] Please continue to read Fig. 9 The liquid inlet 3111 connected to the upstream end of the previous heat exchange channel can be connected to the liquid cooling unit of the electrical equipment through the input pipe 330, and the liquid outlet 3112 connected to the downstream end of the subsequent heat exchange channel can be connected to the liquid cooling unit of the electrical equipment through the output pipe 340, so as to form a circulating flow path for the circulation of heat exchange medium.

[0152] <Structure and manufacturing method of the heat exchange plate 310 having three heat exchange channels>

[0153] The structure of the heat exchange plate 310 with three heat exchange channels is similar to the structure of the heat exchange plate 310 with two heat exchange channels described above, except that the partition assembly of the heat exchange plate 310 with two heat exchange channels includes two baffle assemblies 321 and a partition portion 323, while in this embodiment, Figure 7 As shown, the partition assembly 32 includes two partition parts 323 and three baffle assemblies 321 arranged in sequence along the second direction. The partition assembly 32 and the heat exchange plate body 31 together define three heat exchange channels.

[0154] When there are four or more heat exchange channels, the same applies, and this embodiment will not be listed one by one. Here, the structure of the heat exchange component 300 can refer to the structure of the heat exchange component 300 in the embodiment with two heat exchange channels, and this embodiment will not be repeated here.

[0155] In general, the heat exchange plate 310 is structured to form K heat exchange channels, and when K is a positive integer greater than or equal to 2, the partition assembly 32 may specifically include K baffle assemblies 321 and K-1 partitions 323 arranged in sequence along the second direction, and the partition 323 is used to separate two adjacent heat exchange channels. Among them, the baffle assembly 321 may specifically include N-1 baffles 322, each baffle 322 extends along the second direction, each baffle 322 is located between two adjacent flow channels 33 of the heat exchange channel, and the baffle 322 has a connecting end and a flow-through end opposite to the connecting end along the second direction, and the connecting end refers to the end of the baffle 322 for connection, and the heat exchange medium can flow from one side of the baffle 322 through the flow-through end of the baffle 322 to the other side of the baffle 322. When N≥3, the number of baffles 322 is greater than or equal to 2, and the multiple baffles 322 include a first baffle 3221 and a second baffle 3222 alternately arranged along a first direction, and the flow end of the first baffle 3221 and the flow end of the second baffle 3222 are away from each other, so that the heat exchange medium is turned back once when flowing through each baffle 322.

[0156] It is worth mentioning that Figure 1 The heat exchange plate 310 of the related technology shown is made of an extrusion molding process except for two opposite end plates. In order to be able to demold, each flow channel 33 on the heat exchange plate 310 extends from one end of the heat exchange plate 310 to the other end, resulting in the flow channel 33 being too long and needing to correspond to multiple battery cells 110 at the same time.

[0157] In this embodiment, the heat exchange plate 310 is configured to include a heat exchange plate body 31 and a partition assembly 32, and the partition assembly 32 includes a partition portion 323 and a plurality of baffle assemblies 321. The partition portion 323 can be used to separate two adjacent flow channels 33 along the second direction, so that the length of the flow channel 33 included in each heat exchange channel can be reduced, which is beneficial for the flow channel 33 to exchange heat with only one battery cell 110.

[0158] In some embodiments of the present application, from the upstream end to the downstream end of the flow channel 33 , the cross-sectional shape and cross-sectional area of ​​the flow channel 33 along the direction perpendicular to the second direction may remain unchanged.

[0159] Specifically, in the technical solution of implementing the heat exchange plate 310 using the double-sided tube clamping process, the diameter of each heat exchange tube can be kept constant from the upstream end to the downstream end, so that the cross-sectional shape and cross-sectional area of ​​the flow channel 33 are consistent.

[0160] As an example, the heat exchange plate 310 is implemented as follows Figure 8 and Fig. 9 In the technical solution shown, each baffle 322 can be extended along the second direction, and the vertical distance between any two adjacent baffles 322 is consistent, so that the cross-sectional shape and cross-sectional area of ​​the flow channel 33 are consistent.

[0161] By such an arrangement, the accelerated pressure drop caused by the change in the cross-section of the flow channel 33 can be reduced, which can be beneficial to reducing the pressure drop, that is, the pressure loss of the heat exchange medium is small, thereby increasing the flow rate of the heat exchange medium in the heat exchange channel, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange component 300 on the battery cell 110.

[0162] In some embodiments of the present application, the lengths of the various flow channels 33 of the same heat exchange channel may also be the same.

[0163] In some embodiments of the present application, the number of flow channels 33 corresponding to the heat exchange region for heat exchange with the battery cell 110 may be an even number, such as 2, 4, 6, etc., or an odd number, such as 3, 5, 7, etc. When the number of flow channels 33 corresponding to the heat exchange region is an even number, the even number of flow channels 33 exchanges heat with one battery cell 110. In this way, the lower temperature heat exchange medium and the higher temperature heat exchange medium of each two adjacent flow channels 33 corresponding to the heat exchange region cooperate to exchange heat with one end of the battery cell 110 in the second direction, and the temperature equalization effect is better.

[0164] The second aspect of the present application provides an electrical device, comprising any battery device 1000 provided in the first aspect of the present application, and the battery device 1000 is used to provide electrical energy.

[0165] The electrical equipment has the battery device 1000 of the first aspect as described above. The beneficial effects of the electrical equipment are the same as the beneficial effects of the battery device 1000 of the first aspect as described above, and will not be described in detail in this application.

[0166] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below.

[0167] In the implementation mode of the present application, Figure 5 , Figures 8 to 16As shown, the present application proposes a battery device 1000, including two battery assemblies 100 and a heat exchange assembly 300, each battery assembly 100 includes a plurality of battery cells 110 arranged in sequence along a first direction, the battery cells 110 have a contact surface for contacting and exchanging heat with the heat exchange assembly 300, and the two battery assemblies 100 are arranged in sequence along a second direction. The battery cells 110 are in the shape of a cuboid, the contact surface is rectangular, the first direction is parallel to the width direction of the contact surface, and the second direction is parallel to the length direction of the contact surface. The heat exchange assembly 300 includes a heat exchange plate 310 and a transfer tube 320, the heat exchange plate 310 includes a heat exchange plate body 31 and a partition assembly 32, and one side of the heat exchange plate body 31 along the thickness direction is a heat exchange surface 314.

[0168] The heat exchange plate body 31 includes an annular shell 311, and a first plate 312 and a second plate 313 connected to the annular shell 311. The axis of the annular shell 311 extends along the second direction. The two ends of the annular shell 311 along the second direction are open. The first plate 312 and the second plate 313 respectively block the two ends of the annular shell 311 along the second direction. The first plate 312, the second plate 313 and the annular shell 311 are enclosed together to form a hollow cavity. The annular shell 311 is provided with two liquid inlets 3111 and two liquid outlets 3112.

[0169] The partition assembly 32 is arranged in the hollow cavity. The partition assembly 32 includes two baffle assemblies 321 and a partition portion 323. The two baffle assemblies 321 are arranged in sequence along the second direction. Each baffle assembly 321 includes 14 first baffles 3221 and 15 second baffles 3222. The first baffles 3221 and the second baffles 3222 both extend along the second direction. The first baffles 3221 and the second baffles 3222 are alternately arranged along the first direction. The first baffles 3221 and the second baffles 3222 both have a connection end and a flow-through end along the second direction. The two first baffles 3221 belonging to different baffle assemblies 321 are aligned along the second direction, and the connection ends of the two are connected, and the flow-through ends of the two are separated from each other and face the outside of the hollow cavity. All the first baffles 3221 are integrally formed with the annular shell 311 through an extrusion molding process. The two second baffles 3222 belonging to different baffle assemblies 321 are aligned along the second direction, and the flow-through ends of the two are close to each other. The connection ends of the second baffles 3222 of the two baffle assemblies 321 are respectively connected to the first plate body 312 and the second plate body 313. In this way, each baffle assembly 321, the heat exchange plate body 31 and the partition part 323 together define a plurality of flow channels 33 arranged in sequence along the first direction, and the flow directions of the heat exchange medium in any two adjacent flow channels 33 are opposite. The plurality of flow channels 33 are connected in series in sequence to form a heat exchange channel, and the orthographic projections of the two flow channels 33 belonging to the same heat exchange channel on the heat exchange surface 314 form a heat exchange area, and the heat exchange area contacts the contact surface of a battery cell 110 to perform heat exchange.

[0170] Since two baffle assemblies 321 are provided, the partition assembly 32 and the heat exchange plate body 31 can jointly define two heat exchange channels, which are sequentially distributed along the second direction, and the upstream ends of the two heat exchange channels are respectively connected to the two liquid inlets 3111, and the downstream ends of the two heat exchange channels are respectively connected to the two liquid outlets 3112. The liquid outlet 3112 connected to the downstream end of the previous heat exchange channel is connected to the liquid inlet 3111 connected to the upstream end of the next heat exchange channel through the transfer tube 320.

[0171] The partition part 323 includes 15 flexible sealing plugs 3232 arranged in sequence along the first direction, and two adjacent flexible sealing plugs 3232 are tightly fitted with two opposite surfaces of the same first baffle 3221 along the first direction. The flexible sealing plug 3232 includes an expansion sealing plug 3234 and a threaded fastener 3235. The expansion sealing plug 3234 is provided with a mounting hole, the axis of the mounting hole extends along the second direction, and the threaded fastener 3235 is threadedly matched with the mounting hole. The threaded fastener 3235 can rotate under the action of an external force and can drive the expansion sealing plug 3234 to expand radially outward along the mounting hole.

[0172] The heat exchange plate 310 is symmetrically arranged about the partition part 323. The flow ends of the first baffle 3221 and the second baffle 3222 are both provided with a connecting groove 3223 penetrating the thickness thereof, the connecting groove 3223 is an open groove, the opening of the connecting groove 3223 faces the end surface of the flow end of the baffle 322, and the connecting groove 3223 is a semicircular hole.

[0173] The contact surface refers to the bottom surface of the battery cell 110, that is, the bottom surface of the battery cell 110 contacts the heat exchange surface 314 and exchanges heat with a corresponding heat exchange area. Alternatively, the contact surface refers to the side surface of the battery cell 110, the heat exchange assembly 300 is located between two adjacent battery cells 110, and the side surface of the battery cell 110 contacts the heat exchange surface 314 and exchanges heat with a corresponding heat exchange area.

[0174] The manufacturing process of the heat exchange plate 310 may include the following steps.

[0175] S100, the annular shell 311 and the first baffle 3221 are integrally formed by an extrusion molding process to form Figure 12 to Figure 14 One-piece shown.

[0176] S200, install each flexible sealing plug 3232 in sequence. The installation process of each flexible sealing plug 3232 here is: S201, the expansion sealing plug 3234 of the flexible sealing plug 3232 is in a contracted state, and the flexible sealing plug 3232 is moved from the open end of the annular shell 311 into a passage in the annular shell 311; S202, a tool is inserted into the annular shell 311 from the open end of the annular shell 311, and an external force is applied to the threaded fastener 3235 by using the tool in conjunction with the threaded fastener 3235, so that the threaded fastener 3235 rotates, thereby driving the expansion sealing plug 3234 to expand radially outward along the installation hole, until the expansion sealing plug 3234 in the expanded state matches the corresponding passage to block the passage. Depending on the different threaded fasteners 3235, the tools here may also be different. For example, when the threaded fastener 3235 is a slotted screw, the tool refers to a slotted screwdriver; for example, when the threaded fastener 3235 is a cross screw, the tool refers to a cross screwdriver.

[0177] S300, the second baffles 3222 of the two baffle assemblies 321 are connected to the first plate body 312 and the second plate body 313 respectively, the first plate body 312 is welded to one open end of the annular shell 311, and the second plate body 313 is welded to the other open end of the annular shell 311.

[0178] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: Battery cells; A heat exchange assembly, comprising a heat exchange plate, wherein one side of the heat exchange plate along the thickness direction is a heat exchange surface, and the heat exchange surface exchanges heat with the battery cell; A plurality of flow channels are arranged in the heat exchange plate, the plurality of flow channels are sequentially arranged along the first direction, the plurality of flow channels are sequentially connected in series to form a heat exchange channel, the heat exchange channel is used for the flow of heat exchange medium; the flow channel extends along the second direction, and the flow directions of the heat exchange medium in any two adjacent flow channels on the heat exchange channel are opposite; at least two adjacent flow channels on the heat exchange channel form a heat exchange area on the positive projection of the heat exchange surface, and each heat exchange area exchanges heat with one of the battery cells; The first direction and the second direction intersect.

2. The battery device according to claim 1, characterized in that: The battery cells are provided in plurality and arranged to form a plurality of battery assemblies arranged in sequence along the second direction, each of the battery assemblies comprising a plurality of the battery cells arranged in sequence along the first direction; The heat exchange plate structure is formed with a plurality of the heat exchange channels arranged in sequence along the second direction, the plurality of the heat exchange channels correspond one-to-one to the plurality of battery assemblies, and any two adjacent heat exchange channels are connected in series.

3. The battery device according to claim 2, characterized in that: The heat exchange plate comprises: A heat exchange plate body, which exchanges heat with the battery monomer, wherein a hollow cavity is provided inside the heat exchange plate body; and A partition assembly is arranged in the hollow cavity, and the partition assembly and the heat exchange plate body jointly define a plurality of the heat exchange channels; the partition assembly includes a partition portion and a plurality of baffle assemblies arranged in sequence along the second direction, each of the partition portions is used to separate two adjacent heat exchange channels, and the number of the baffle assemblies is the same as the number of the heat exchange channels; the baffle assembly includes baffles extending along the second direction, each of the baffles is located between two adjacent flow channels of the heat exchange channel, and the baffles have opposite connecting ends and flow-through ends along the second direction, and the heat exchange medium flows from one side of the baffle to the other side via the flow-through end.

4. The battery device according to claim 3, characterized in that The heat exchange plate body comprises: an annular shell, the axis of which extends along the second direction, and both ends of which are open along the second direction; and The first plate body and the second plate body are arranged opposite to each other along the second direction. The first plate body and the second plate body are respectively connected to two ends of the annular shell and are enclosed together with the annular shell to form the hollow cavity.

5. The battery device according to claim 4, characterized in that: When two baffle assemblies are provided, each of the baffle assemblies includes a plurality of baffles, and the plurality of baffles include a first baffle and a second baffle alternately arranged along the first direction, the two first baffles belonging to different baffle assemblies are aligned, and the flow ends thereof are away from each other, and the connecting ends thereof are connected, the two second baffles belonging to different baffle assemblies are aligned, and the flow ends thereof are close to each other, and all the first baffles and the annular shell are an integral part.

6. The battery device according to claim 3, characterized in that: The flow end of the baffle is provided with a connecting groove, the connecting groove runs through the thickness of the baffle, any two adjacent flow channels on the heat exchange channel are connected through the connecting groove, and the connecting groove is an open groove, and the opening of the connecting groove faces the end face of the flow end.

7. The battery device according to claim 6, characterized in that: The heat exchange plate body is provided with a plurality of liquid inlets and a plurality of liquid outlets, the upstream end of each heat exchange channel is connected to a liquid inlet, and the downstream end of each heat exchange channel is connected to a liquid outlet; the flow cross-sectional areas of the liquid inlet, the liquid outlet and the connecting groove are equal.

8. The battery device according to claim 2, characterized in that: The heat exchange plate body is provided with a plurality of liquid inlets and a plurality of liquid outlets, the upstream end of each heat exchange channel is connected to one of the liquid inlets, and the downstream end of each heat exchange channel is connected to one of the liquid outlets; The heat exchange assembly further includes a transfer tube located outside the heat exchange plate, wherein an inlet end and an outlet end of the transfer tube are respectively connected to two adjacent heat exchange channels.

9. The battery device according to claim 3, characterized in that: The partition part is an integral structure, and the partition part extends from one end of the heat exchange plate body along the first direction to the other end of the heat exchange plate body along the first direction, and the partition part is located between two adjacent baffle assemblies.

10. The battery device according to claim 3, characterized in that: The partition portion includes a plurality of sub-partition elements sequentially arranged along the first direction, and each of the flow channels is defined by the baffle, the heat exchange plate body and the sub-partition elements.

11. The battery device according to claim 10, characterized in that: Two adjacent sub-partitioning elements are tightly fitted to two opposite surfaces of the same baffle along the first direction.

12. The battery device according to claim 10, characterized in that: The sub-partitioning element is a flexible sealing plug.

13. The battery device according to claim 12, characterized in that: The flexible sealing plug includes an expansion sealing plug and a threaded fastener. The expansion sealing plug is provided with a mounting hole. The axis of the mounting hole extends along the second direction. The threaded fastener is threadedly matched with the mounting hole. The threaded fastener can rotate under the action of external force and can drive the expansion sealing plug to expand radially outward along the mounting hole.

14. The battery device according to claim 13, characterized in that: An annular groove or a plurality of annular grooves spaced apart along the second direction is provided on the peripheral side surface of the flexible sealing plug, and the axis of the annular groove extends along the second direction.

15. The battery device according to any one of claims 10 to 14, characterized in that: There are two baffle assemblies, and any one of the sub-partition elements is located in the middle of the heat exchange plate body along the second direction.

16. The battery device according to any one of claims 1 to 14, characterized in that: The first direction is parallel to the width direction of the contact surface on the battery cell for contacting and exchanging heat with the heat exchange area, and the second direction is parallel to the length direction of the contact surface; or, the first direction is parallel to the length direction of the contact surface on the battery cell for contacting and exchanging heat with the heat exchange area, and the second direction is parallel to the width direction of the contact surface.

17. The battery device according to any one of claims 1 to 14, characterized in that: The number of the flow channels corresponding to the heat exchange region for heat exchange of the battery cells is an even number.

18. An electrical equipment, characterized in that: include: The battery device according to any one of claims 1 to 17, wherein the battery device is used to provide electrical energy.

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