CN223665538U

CN223665538U - Battery devices, electrical equipment and energy storage devices

Info

Publication number: CN223665538U
Application number: CN202522333863.7U
Authority: CN
Inventors: 张滨
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2025-11-04
Filing date: 2025-11-04
Publication date: 2025-12-12
Anticipated expiration: 2035-11-04

Abstract

This application relates to the field of battery technology and provides a battery device, an electrical device, and an energy storage device. The battery device includes a housing and battery cells and a heat exchange plate disposed within the housing. The heat exchange plate can exchange heat with the sides of the battery cells. The bottom plate of the housing has flow channels inside, which can exchange heat with the bottom surface of the battery cells. The bottom of the heat exchange plate has a connecting opening that communicates with the flow channels inside the bottom plate, allowing the heat exchange medium to flow through the flow channels in the bottom plate. This structural design eliminates the need for pipes on both sides of the heat exchange plate along its length, solving the problems associated with arranging pipes inside the housing and reducing the space occupied by pipes within the housing, thereby increasing the energy density of the battery device.

Description

Battery device, electric equipment and energy storage equipment

Technical Field

The application relates to the technical field of batteries, in particular to a battery device, electric equipment and energy storage equipment.

Background

New energy batteries are increasingly used in life and industry, for example, new energy automobiles having a battery mounted therein have been widely used, and in addition, batteries are increasingly used in the field of energy storage and the like.

In the related art, a plurality of battery cells and a heat exchange plate for exchanging heat between the battery cells are arranged in a box body to form a battery device, and how to efficiently utilize the internal space of the battery box body and improve the energy density of the battery device is a problem to be solved urgently.

The statements made above merely serve to provide background information related to the present disclosure and may not necessarily constitute prior art.

Disclosure of utility model

In view of the above problems, embodiments of the present application provide a battery device, an electric device, and an energy storage device, which are beneficial to improving the energy density of the battery device.

In a first aspect, embodiments of the present application provide a battery device including a liquid inlet pipe, a liquid outlet pipe, a case having an installation cavity, and a battery cell and a heat exchange plate accommodated in the installation cavity;

The box body comprises a bottom plate, a first flow passage and a second flow passage for flowing a heat exchange medium are formed in the bottom plate, the first flow passage is communicated with the liquid inlet pipe, the second flow passage is communicated with the liquid outlet pipe, and the bottom plate is contacted with the bottom surface of the battery monomer and can exchange heat with the bottom surface of the battery monomer;

a first opening and a second opening are formed in one side, facing the battery cell, of the bottom plate, the first opening is communicated with the first flow channel, and the second opening is communicated with the second flow channel;

The heat exchange plate is internally provided with a third runner and a fourth runner which are used for flowing a heat exchange medium and are communicated with each other, and the heat exchange plate is contacted with the side surface of the battery monomer and can exchange heat with the side surface of the battery monomer;

The heat exchange plate is connected to the bottom plate, and a first communication port and a second communication port are formed in one side, facing the bottom plate, of the heat exchange plate;

The first communication port is in sealing butt joint with the first opening so as to communicate the first runner with the third runner, and the second communication port is in sealing butt joint with the second opening so as to communicate the second runner with the fourth runner.

According to the technical scheme, the flow channels are formed in the bottom plate of the box body, the flow channels can be communicated with the flow channels in the heat exchange plates and can jointly form a circulation path of a heat exchange medium, the flow channels in the bottom plate can exchange heat for the bottom surface of the battery unit, the flow channels in the heat exchange plates can exchange heat for the side surfaces of the battery unit, and the heat dissipation efficiency of the battery device can be improved through heat exchange for the surfaces of the battery unit. In addition, the heat exchange plate is provided with the communication ports for inflow and outflow of the heat exchange medium at the bottom, so that pipelines on two sides of the heat exchange plate in the length direction can be omitted, the occupied space of the pipelines in the box body is reduced, the inner space of the box body can be utilized more efficiently and reasonably, and the energy density of the battery device is improved.

In some embodiments, the first flow channel is provided with an inlet and an outlet at two ends of the extending direction of the first flow channel, and the inlet of the first flow channel is communicated with the liquid inlet pipe;

The second flow passage is provided with an inlet and an outlet at two ends of the extending direction, the inlet of the second flow passage is communicated with the outlet of the first flow passage, and the outlet of the second flow passage is communicated with the liquid outlet pipe.

In the technical scheme, the first flow channel and the second flow channel in the bottom plate are matched with the liquid inlet pipe and the liquid outlet pipe, so that a circulation path of the heat exchange medium can be formed, the heat exchange capacity of the first flow channel and the second flow channel in the bottom plate can be improved, and the heat dissipation efficiency of the bottom surface of the battery cell can be improved.

In some embodiments, a first partition is disposed within the base plate to isolate the first flow channel from the second flow channel.

According to the technical scheme, the first flow channel and the second flow channel are not directly communicated in the bottom plate through the first partition plate, so that the heat exchange medium in the first flow channel can only flow into the second flow channel through the flow channel in the heat exchange plate and form a circulation path of the heat exchange medium, and the flow channel in the heat exchange plate can flow through sufficient heat exchange medium to improve the heat dissipation efficiency of the side face of the battery monomer.

In some embodiments, a second partition is provided inside the bottom plate to divide the first flow channel and/or the second flow channel into a plurality of first sub-flow channels.

According to the technical scheme, the second partition plate is arranged, so that the heat exchange medium can be guided to be distributed more uniformly in the first flow channel and/or the second flow channel to improve the heat exchange uniformity of the battery monomer, and the structural strength of the first flow channel and/or the second flow channel can be enhanced, so that the overall structural strength of the bottom plate and the box body can be enhanced.

In some embodiments, at least a portion of the first sub-flow passage communicates end-to-end.

According to the technical scheme, at least part of the first sub-flow channels are communicated in an end-to-end mode, so that part or all of the first sub-flow channels are communicated in sequence, and then heat exchange medium can be guided to flow through most or all areas of the first flow channels and/or the second flow channels, and therefore heat dissipation efficiency of the bottom surface of the battery cell is improved.

In some embodiments, the first flow passage is divided by a second partition into a plurality of first sub-flow passages arranged side by side, one end of each of the plurality of first sub-flow passages in the first flow passage, which is close to the liquid inlet pipe, is communicated with the liquid inlet pipe, and/or,

The second runner is separated into a plurality of first sub-runners which are arranged side by the second partition board, and one ends of the first sub-runners in the second runner, which are close to the liquid outlet pipe, are communicated with the liquid outlet pipe.

Among the above-mentioned technical scheme, through setting up a plurality of first sub-runners in first runner and/or the second runner and setting up side by side to all with feed liquor pipe or drain pipe intercommunication, can simplify the runner design in the bottom plate, the processing of being convenient for, a plurality of second baffles of a plurality of first sub-runners that set up side by side can restrict in addition and arrange in the inside of bottom plate side by side, helps promoting the overall structure intensity of bottom plate.

In some embodiments, the third flow channel is provided with an inlet and an outlet at both ends of the extending direction thereof, the inlet of the third flow channel being in communication with the first communication port;

The fourth runner is provided with an inlet and an outlet at two ends of the extending direction of the fourth runner, the inlet of the fourth runner is communicated with the outlet of the third runner, and the outlet of the fourth runner is communicated with the second communication port.

In the above technical scheme, the communication position between the third flow channel and the fourth flow channel is set at the position far away from the first communication port and the second communication port, so that the heat exchange medium can flow through most or all areas in the heat exchange plate, and the heat dissipation efficiency of the side face of the battery cell is improved.

In some embodiments, a third partition is provided inside the heat exchange plate to divide the third flow passage and/or the fourth flow passage into a plurality of second sub-flow passages.

According to the technical scheme, the third partition plate is arranged, so that the heat exchange medium can be guided to be distributed more uniformly in the third flow channel and/or the fourth flow channel to improve the heat exchange uniformity of the battery monomer, and the structural strength of the third flow channel and/or the fourth flow channel can be enhanced, so that the overall structural strength of the heat exchange plate can be enhanced.

In some embodiments, at least a portion of the second sub-flow channels are in end-to-end communication.

According to the technical scheme, at least part of the second sub-flow channels are communicated end to end, so that part or all of the second sub-flow channels are communicated in sequence, and then the heat exchange medium can be guided to flow through most or all areas of the third flow channel and/or the fourth flow channel, so that the heat dissipation efficiency of the side face of the battery cell is improved.

In some embodiments, the third flow passage is divided by a third partition into a plurality of second sub-flow passages arranged side by side, one end of the plurality of second sub-flow passages in the third flow passage, which is close to the first communication port, is communicated with the first communication port, and one end of the plurality of second sub-flow passages in the third flow passage, which is far from the first communication port, is communicated with the fourth flow passage, and/or,

The fourth runner is separated into a plurality of second sub-runners which are arranged side by the third partition board, one end, close to the second communication port, of the plurality of second sub-runners in the fourth runner is communicated with the second communication port, and one end, far away from the second communication port, of the plurality of second sub-runners in the fourth runner is communicated with the third runner.

In the technical scheme, the plurality of second sub-flow passages in the third flow passage and/or the fourth flow passage are arranged side by side and are communicated with the first communication port or the second communication port, so that the flow passage design in the heat exchange plate can be simplified, the processing is convenient, the plurality of second sub-flow passages arranged side by side can limit the plurality of third partition plates to be arranged side by side in the heat exchange plate, and the integral structural strength of the heat exchange plate is improved.

In some embodiments, the first flow channels and the second flow channels are alternately arranged along the length of the heat exchanger plate, and/or,

The third flow channels and the fourth flow channels are alternately arranged along the length direction of the heat exchange plate.

According to the technical scheme, the first flow channels and the second flow channels are alternately arranged, so that the first flow channels can be correspondingly arranged in the middle area of the bottom surface of each battery cell, the second flow channels are arranged in the side area of the bottom surface of each battery cell, and the heat exchange uniformity of the bottom surface of each battery cell in the box body can be improved. Similarly, by arranging the third flow channels and the fourth flow channels alternately, the third flow channels can be correspondingly arranged in the middle area of the side face of each battery cell, and the fourth flow channels can be arranged in the side edge area of the side face of each battery cell, so that the heat exchange uniformity of the side face of each battery cell in the box body can be improved.

In some embodiments, the second flow channel is provided at least one end of the soleplate in the length direction of the heat exchange plate, and/or,

The fourth flow passage is arranged at least one end of the heat exchange plate in the length direction.

According to the technical scheme, the second flow channel and the fourth flow channel are arranged on the side of the battery device, so that the first flow channel and the third flow channel with relatively low temperature can exchange heat with the high-temperature area in the middle of the battery device, the bottom plate and the heat exchange plate can exchange heat for the battery cells in different areas in the battery device more reasonably, and the overall heat exchange uniformity of the battery device can be improved.

In some embodiments, the first communication port and the first opening and the second communication port and the second opening are sealingly engaged by an adapter.

Further, the adapter comprises a tube body;

The pipe body is divided into an upper pipe section and a lower pipe section, wherein the upper pipe section is configured to be inserted into the first communication port and the second communication port respectively, and the lower pipe section is configured to be inserted into the first opening and the second opening respectively;

The pipe body is provided with a communication hole for communicating the first communication port with the first opening and communicating the second communication port with the second opening.

Further, the adapter also comprises a flange which is arranged around the outer periphery of the pipe body;

The flange has a first abutment surface configured to be able to abut against a surface of the heat exchange plate facing the side of the bottom plate, and a second abutment surface configured to be able to abut against a surface of the bottom plate facing the side of the heat exchange plate.

In the technical scheme, the adapter is arranged between the bottom plate and the heat exchange plate for butt joint, so that the heat exchange plate can be positioned and assembled on the bottom plate on one hand, and the tightness between the opening of the bottom plate and the communication port of the heat exchange plate can be improved on the other hand.

In some embodiments, the adapter is a rubber piece.

In the technical scheme, the adapter is designed to be a rubber part, so that the tightness between the opening of the bottom plate and the communication port of the heat exchange plate can be further improved.

In some embodiments, a first positioning tube is arranged on one side of the bottom plate facing the mounting cavity, the first positioning tube is connected with the peripheries of the first opening and the second opening, and the first positioning tube is configured to be inserted into the first communication opening and the second communication opening respectively, or

The heat exchange plate is provided with the second locating pipe towards one side of bottom plate, and the second locating pipe is connected in the periphery of first intercommunication mouth and second intercommunication mouth, and the second locating pipe is configured to can insert respectively in first opening and the second opening.

Among the above-mentioned technical scheme, through setting up first locating tube or set up the second locating tube on the heat exchange plate on the bottom plate, can make bottom plate and heat exchange plate carry out positioning assembly to reduce the assembly degree of difficulty, improve assembly efficiency.

In some embodiments, the housing further comprises a sidewall that together with the floor defines a mounting cavity;

the heat exchange plate is connected with the side wall along the end part of the length direction.

In the technical scheme, the end part of the heat exchange plate is connected with the side wall of the box body, so that the overall structural strength of the battery device can be improved.

In a second aspect, an embodiment of the present application further provides an electric device, including a battery device provided in any one of the embodiments of the first aspect, where the battery device is used to provide electric energy.

In a third aspect, embodiments of the present application further provide an energy storage device, including a battery device provided in any one of the embodiments of the first aspect, where the battery device is used to store electric energy.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic illustration of a vehicle according to some embodiments of the present application;

Fig. 2 is a schematic exploded view of a battery device according to some embodiments of the present application;

fig. 3 is a schematic view illustrating an internal structure of a battery device according to some embodiments of the present application;

fig. 4 is a schematic perspective view of a battery cell according to some embodiments of the present application;

Fig. 5 is a schematic perspective view of a case according to some embodiments of the present application;

FIG. 6 is a schematic view of the internal structure of a base plate provided according to some embodiments of the present application;

fig. 7 is a schematic perspective view of a heat exchange plate according to some embodiments of the present application;

Fig. 8 is a schematic view illustrating an internal structure of a heat exchange plate according to some embodiments of the present application;

FIG. 9 is a schematic diagram illustrating an assembly relationship between a heat exchange plate and a base plate according to some embodiments of the present application;

FIG. 10 is a schematic diagram of a layout of a first flow channel in a base plate according to some embodiments of the present application;

FIG. 11 is a schematic diagram of a layout of a second flow channel in a base plate according to some embodiments of the present application;

FIG. 12 is a schematic diagram of a layout of a third flow channel in a base plate according to some embodiments of the present application;

FIG. 13 is a schematic diagram of a fourth flow path layout in a base plate according to some embodiments of the present application;

FIG. 14 is a schematic diagram of a fifth flow path layout in a base plate according to some embodiments of the present application;

FIG. 15 is a schematic diagram of a sixth flow path layout in a base plate according to some embodiments of the present application;

FIG. 16 is a schematic diagram of a seventh flow path layout in a base plate according to some embodiments of the present application;

FIG. 17 is a schematic diagram of an eighth flow path layout in a base plate according to some embodiments of the present application;

FIG. 18 is a schematic diagram of a ninth flow path layout in a base plate according to some embodiments of the present application;

FIG. 19 is a schematic diagram of a tenth flow path layout in a base plate according to some embodiments of the present application;

FIG. 20 is a schematic view illustrating a layout of a first flow passage in a heat exchange plate according to some embodiments of the present application;

FIG. 21 is a schematic diagram illustrating a layout of a second type of flow channels within a heat exchange plate according to some embodiments of the present application;

FIG. 22 is a schematic diagram illustrating a layout of a third flow channel in a heat exchange plate according to some embodiments of the present application;

FIG. 23 is a schematic view illustrating a layout of a fourth flow passage in a heat exchange plate according to some embodiments of the present application;

FIG. 24 is a schematic view illustrating a fifth flow path layout in a heat exchange plate according to some embodiments of the present application;

FIG. 25 is a schematic view illustrating a sixth flow path layout in a heat exchange plate according to some embodiments of the present application;

FIG. 26 is a schematic diagram of an eleventh flow path layout in a base plate according to some embodiments of the present application;

FIG. 27 is a schematic view of a seventh flow path layout in a heat exchange plate according to some embodiments of the present application;

FIG. 28 is a schematic diagram of a twelfth flow path layout in a base plate according to some embodiments of the present application;

FIG. 29 is a schematic view illustrating an eighth flow path layout in a heat exchange plate according to some embodiments of the present application;

FIG. 30 is a schematic view of an angled perspective of an adapter according to some embodiments of the present application;

FIG. 31 is a schematic view of another perspective view of an adapter according to some embodiments of the present application;

FIG. 32 is a schematic diagram illustrating the assembly relationship between an adapter, a heat exchange plate, and a base plate according to some embodiments of the present application;

FIG. 33 is a schematic view of an assembled relationship between a first positioning tube, a heat exchanger plate, and a bottom plate provided in accordance with some embodiments of the present application;

fig. 34 is a schematic diagram illustrating an assembly relationship between a second positioning tube, a heat exchange plate, and a bottom plate according to some embodiments of the present application.

The reference numerals are as follows:

1000-vehicle;

100-battery device, 110-battery cell assembly, 120-case, 1201-first case, 1202-second case;

200-a controller;

300-motor;

10-battery cells, 101-top, 102-bottom, 103-large side, 104-small side, 105-pole;

20-floor, 201-first runner, 2011-inlet of first runner, 2012-outlet of first runner, 202-second runner, 2021-inlet of second runner, 2022-outlet of second runner, 203-first opening, 204-second opening, 205-first baffle, 206-second baffle, 207-first sub-runner;

30-a heat exchange plate, 301-a third flow passage, 3011-an inlet of the third flow passage, 3012-an outlet of the third flow passage, 302-a fourth flow passage, 3021-an inlet of the fourth flow passage, 3022-an outlet of the fourth flow passage, 303-a first communication port, 304-a second communication port, 305-a third partition plate, 306-a second sub flow passage;

40-liquid inlet pipe;

50-a liquid outlet pipe;

60-adapter, 601-flange, 6011-first abutting surface, 6012-second abutting surface, 602-upper pipe section, 603-lower pipe section, 604-communication hole;

70-a first positioning tube;

80-a second positioning tube;

90-side wall.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs, the terms used in this application are used merely for the purpose of describing particular embodiments and are not intended to limit the application, and the terms "include" and "have" and any variations thereof in the description of this application and the above description of the drawings are intended to cover non-exclusive inclusions.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the described embodiments of the application may be combined with other embodiments.

The word "exemplary" with reference to embodiments of the application is intended to mean "serving as an example, embodiment, or illustration. Any embodiment described as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

In the description of embodiments of the present application, the technical terms "first," "second," "third," etc. are used merely to distinguish between different objects and should not be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship.

In the description of the embodiment of the present application, the technical term "and/or" is merely an association relationship describing the association object, which means that three relationships may exist, for example, a and/or B, and may mean that a exists alone, while a and B exist together, and B exists alone. In this context, the character "/" generally indicates that the associated object is an "or" relationship.

In describing embodiments of the present application, the terms "mounted," "connected," "secured," and the like should be construed broadly, unless otherwise indicated and limited. For example, the components may be fixedly connected, detachably connected or integrally connected, mechanically connected or electrically connected, directly connected or indirectly connected through an intermediate medium, and communicated with each other inside the two components or the interaction relationship of the two components. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

In the description of the embodiments of the present application, the terms "upper", "lower", "inner", "outer", "front", "rear", "left", "right", "top", "bottom", etc. indicate orientations or positional relationships based on the embodiments of the present application in an operating state, and are merely for convenience in describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

In the description of embodiments of the application, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature "above," "over" and "on" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the embodiments of the present application, "parallel" includes not only the case of absolute parallelism but also the case of general parallelism that is conventionally recognized in engineering, and at the same time, "perpendicular" includes not only the case of absolute perpendicularity but also the case of general perpendicularity that is conventionally recognized in engineering.

In the description of the embodiments of the present application, the meaning of "plurality" is two or more (including two) unless otherwise specifically defined.

In the description of the embodiments of the present application, the same reference numerals denote the same components, and in the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, etc. dimensions of the various components in the embodiments of the application shown in the drawings, as well as the overall thickness, length, etc. dimensions of the integrated device, are merely illustrative and should not be construed as limiting the application in any way.

Currently, the more widely the battery is used in view of the development of market situation. The battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles and the like, and various fields such as aerospace and the like. With the continuous expansion of the battery application field, the market demand thereof is also continuously expanding.

In order to obtain sufficient power for the battery device, a plurality of battery cells in a case of the battery device are generally stacked in an aligned manner. But battery monomer can produce a large amount of heat in continuous charge and discharge use to can lead to battery device's inside temperature to rise, and the structure that a plurality of battery monomers stacked the setting can aggravate the production of this kind of phenomenon, and then seriously influence battery device's performance and life, can lead to even that battery device has great potential safety hazard in the use, be unfavorable for consumer's safety in utilization. Therefore, in the related art, a heat exchange plate for cooling the battery unit is generally arranged in the battery device, and pipelines are arranged on two sides of the heat exchange plate in the length direction of the heat exchange plate in the conventional design, so that a circulation path is formed by the heat exchange medium conveniently, the low-temperature heat exchange medium is sent into a flow channel in the heat exchange plate, and then the heat exchange medium after heat exchange is discharged from the flow channel in the heat exchange plate. The pipelines between two adjacent heat exchange plates are communicated through the sleeve, so that the plurality of heat exchange plates are connected in series or in parallel, and the flow management of a heat exchange medium is facilitated. However, due to the error of the structure of the pipeline and the assembly tolerance, the pipelines between two adjacent heat exchange plates may not be on the same horizontal line, so that the sleeve is difficult to assemble or fails to assemble, leakage is very easy to generate, the electric safety problem inside the battery device is affected, and the pipelines at two sides of the heat exchange plates occupy more space inside the battery device, thereby reducing the energy density of the battery device.

Based on the above problems, an embodiment of the present application provides a battery device, which includes a case, and a battery cell and a heat exchange plate disposed in the case, wherein the heat exchange plate can exchange heat with a side surface of the battery cell. The bottom of the heat exchange plate is provided with a communication port and can be communicated with the flow passage in the bottom plate, so that a heat exchange medium can flow through the heat exchange plate through the flow passage in the bottom plate. By adopting the structural design, the heat exchange plate can omit pipelines on two sides of the heat exchange plate in the length direction, so that the problem caused by arranging the pipelines in the box body is solved, and the occupied space of the pipelines in the box body can be reduced, so that the energy density of the battery device is improved.

The technical scheme provided by the embodiment of the application is suitable for electric equipment using the battery device as a power supply and energy storage equipment using the battery device as an energy storage element. The electric equipment can be a vehicle, a ship, a spacecraft and the like. The energy storage device may be an energy storage container, an energy storage electric cabinet, or the like.

For convenience of description, the embodiment of the application will be described by taking an example in which the battery device is applied to a vehicle.

Referring to fig. 1, fig. 1 is a schematic structural view of a vehicle according to some embodiments of the present application. The vehicle 1000 may be a fuel oil 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. The battery device 100 is provided in the interior of the vehicle 1000, and the battery device 100 may be provided at the bottom or at the head or at the tail of the vehicle 1000. The battery device 100 may be used for power supply of the vehicle 1000, for example, the battery device 100 may serve as an operating power source of the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300, the controller 200 being configured to control the battery device 100 to power the motor 300, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000.

In some embodiments, battery device 100 may not only serve as an operating power source for vehicle 1000, but may also serve as a driving power source for vehicle 1000, providing driving power to the vehicle instead of or in part instead of fuel oil or natural gas.

Referring to fig. 2, fig. 2 is an exploded structure view of a battery device according to some embodiments of the present application. The battery device includes a case 120 and a battery cell assembly 110, the case 120 has a receiving cavity, and the battery cell assembly 110 is received in the receiving cavity of the case 120.

In some embodiments, the battery device (Battery Apparatus) may include one or more battery cell assemblies (Battery Cell Assembly) for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells connected in series, parallel, or series-parallel by a bus member.

In some embodiments, the battery cell assembly is generally formed from a plurality of battery cells arranged.

As an example, the Battery cell assembly may be a Battery Module (Battery Module) formed by arranging and fixing a plurality of Battery cells to form an independent Module.

As an example, the battery module may be formed by binding a plurality of battery cells by a tie.

In some embodiments, the battery device may be a battery Pack (battery Pack) that includes a case and one or more battery cell assemblies housed in the case.

As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the case in such a manner that the battery module is fixed in the case.

As an example, the battery cell assembly may be accommodated in the case by directly fixing a plurality of battery cells to the case.

As an example, as shown in fig. 2, the case 120 may include a first case 1201 and a second case 1202. The first and second cases 1201 and 1202 are fastened such that a closed space is formed inside the case 120 to receive the battery cell assembly 110. The closing means covering or closing, and can be sealing or unsealing. The first box 1201 may be a top cover or a bottom plate.

As an example, the case may include a top cover, a frame, and a bottom plate. The frame can be enclosed by a plurality of side walls, and top cap and bottom plate are connected with the frame respectively for box inside forms the enclosure, in order to accomodate battery cell subassembly.

In some embodiments, the tank may be part of the chassis structure of the vehicle. For example, a portion of the tank may become at least a portion of the floor of the vehicle, or a portion of the tank may become at least a portion of the cross member and the side member of the vehicle.

In some embodiments, the battery cell may be a secondary battery, which refers to a battery cell that can be continuously used by activating an active material by way of charging after the battery cell is discharged.

As an example, the battery cell may be a lithium 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 hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which the embodiment of the application is not limited to.

As an example, the battery cell may be a prismatic battery cell or other shaped battery cell having a bottom surface and a side surface, including a square-case battery cell, a blade-shaped battery cell, a polygonal-prismatic battery cell, such as a hexagonal-prismatic battery cell, etc., and the embodiment of the application is not limited thereto.

Technical solutions of embodiments of the present application are described in detail below with reference to the accompanying drawings, and technical features related to different embodiments of the present application described below may be combined with each other as long as they do not form a conflict with each other.

Referring to fig. 3 to 9, fig. 3 is a schematic view of an internal structure of a battery device according to some embodiments of the present application, fig. 4 is a schematic view of a three-dimensional structure of a battery cell according to some embodiments of the present application, fig. 5 is a schematic view of a three-dimensional structure of a case according to some embodiments of the present application, fig. 6 is a schematic view of an internal structure of a base plate according to some embodiments of the present application, fig. 7 is a schematic view of a three-dimensional structure of a heat exchange plate according to some embodiments of the present application, fig. 8 is a schematic view of an internal structure of a heat exchange plate according to some embodiments of the present application, and fig. 9 is a schematic view of an assembly relationship between a heat exchange plate and a base plate according to some embodiments of the present application.

In a first aspect, as shown in fig. 3 to 9, an embodiment of the present application provides a battery device including a liquid inlet pipe 40, a liquid outlet pipe 50, a case 120 having a mounting cavity, and a battery cell 10 and a heat exchange plate 30 accommodated in the mounting cavity. The case 120 includes a bottom plate 20, a first flow channel 201 and a second flow channel 202 for flowing a heat exchange medium are formed inside the bottom plate 20, the first flow channel 201 is communicated with the liquid inlet pipe 40, the second flow channel 202 is communicated with the liquid outlet pipe 50, the bottom plate 20 is contacted with the bottom surface 102 of the battery cell 10 and can exchange heat with the bottom surface 102 of the battery cell 10, a first opening 203 and a second opening 204 are formed on one side of the bottom plate 20 facing the battery cell 10, the first opening 203 is communicated with the first flow channel 201, the second opening 204 is communicated with the second flow channel 202, a third flow channel 301 and a fourth flow channel 302 for flowing the heat exchange medium and communicated with each other are formed inside the heat exchange plate 30, the heat exchange plate 30 is contacted with the side surface of the battery cell 10 and can exchange heat with the side surface of the battery cell 10, the heat exchange plate 30 is connected to the bottom plate 20, a first communication opening 303 and a second communication opening 304 are formed on one side of the heat exchange plate 30 facing the bottom plate 20, the first communication opening 303 is in sealed butt joint with the first opening 203 to communicate the first flow channel 201 with the third flow channel 301, the second communication opening 204 is in communication with the second communication opening 204 is in butt joint with the second communication opening 204 to communicate with the second flow channel 302.

Specifically, as shown in fig. 4, the outer surface of the battery cell 10 includes a top surface 101, a bottom surface 102 and a side surface, a pole 105 may be disposed on the top surface 101 of the battery cell 10, the bottom surface 102 of the battery cell 10 is disposed opposite to the top surface 101 of the battery cell 10, the side surface of the battery cell 10 is enclosed between the bottom surface 102 of the battery cell 10 and the top surface 101 of the battery cell 10, the side surface of the battery cell 10 includes a large side surface 103 and a small side surface 104 of the battery cell 10, the large side surface 103 of the battery cell 10 refers to a plane with the largest area in the side surfaces of the battery cell 10, and the small side surface 104 of the battery cell 10 refers to other planes after the large side surface of the battery cell 10 is removed from the side surfaces of the battery cell 10.

Alternatively, the number of the battery cells 10 may be plural, and the plurality of battery cells 10 may be distributed in an array in the installation cavity of the case 120.

Specifically, the contact of the bottom plate 20 with the bottom surface 102 of the battery cell 10 means that the bottom plate 20 may be in direct contact or indirect contact with the bottom surface 102 of the battery cell 10. The indirect contact between the bottom plate 20 and the bottom surface 102 of the battery cell 10 may be that an adhesive layer is coated between the bottom plate 20 and the bottom surface 102 of the battery cell 10, so that the battery cell 10 may be fixed on the bottom plate 20.

Alternatively, the side of the bottom plate 20 facing the battery cell 10 may be a plate surface perpendicular to the thickness direction of the bottom plate 20 in the outer surface of the bottom plate 20, and the plate surface may be a plane having the largest area in the outer surface of the bottom plate 20.

Specifically, the contact of the heat exchange plate 30 with the side of the battery cell 10 means that the heat exchange plate 30 may be in direct contact or indirect contact with the side of the battery cell 10. The indirect contact between the heat exchange plate 30 and the side surface of the battery cell 10 may be that an adhesive layer is coated between the heat exchange plate 30 and the side surface of the battery cell 10, so that the battery cell 10 may be fixedly connected with the heat exchange plate 30.

Alternatively, the heat exchange plate 30 may be a metal member, wherein the metal member may be made of aluminum alloy or the like. Or the heat exchange plate 30 may be a plastic member, wherein the plastic member may be made of polyamide (Polyamide, PA), polyphenylene sulfide (Polyphenylene Sulfide, PPS), polyphenylene oxide (Polyphenylene Oxide, PPO), or the like.

Alternatively, as shown in fig. 7, the heat exchange plate 30 may have a strip-shaped plate structure, and a plane having the largest area among the outer surfaces of the heat exchange plate 30 may be attached to the side of the battery cell 10. For example, the plurality of battery cells 10 may be arranged along the length direction of the heat exchange plate 30, the side surfaces of the plurality of battery cells 10 may be designed to be coplanar, and a plane with the largest area in the outer surface of the heat exchange plate 30 may be attached to the side surfaces of the plurality of battery cells 10.

Alternatively, the side of the heat exchange plate 30 facing the bottom plate 20 may be a plate surface parallel to the thickness direction of the heat exchange plate 30 among the outer surfaces of the heat exchange plate 30, which may be regarded as the bottom surface of the heat exchange plate 30.

Alternatively, the number of the heat exchange plates 30 may be one or more, and when the number of the heat exchange plates 30 is plural, the plurality of heat exchange plates 30 may be disposed side by side with a space between two adjacent heat exchange plates 30 may be used to accommodate the battery cell 10.

Alternatively, the heat exchange plate 30 may be an air-cooled heat exchange plate 30 or a liquid-cooled heat exchange plate 30, and the heat exchange medium flowing through the channels inside the heat exchange plate 30 and the channels inside the bottom plate 20 may be air, water, cooling liquid, or the like.

Alternatively, the outer contour of the first communication port 303 may be identical to the outer contour of the first opening 203, and the sealing and abutting between the first communication port 303 and the first opening 203 may be that sealant is disposed on the outer periphery of the abutting joint between the first communication port 303 and the first opening 203, so that the heat exchange medium does not leak at the abutting joint between the first communication port 303 and the first opening 203 while the first flow channel 201 communicates with the third flow channel 301.

Alternatively, the outer contour of the second communication port 304 may be identical to the outer contour of the second opening 204, and the sealing and abutting between the second communication port 304 and the second opening 204 may be that sealant is disposed on the outer periphery of the abutting joint of the second communication port 304 and the second opening 204, so that the heat exchange medium cannot leak at the abutting joint of the second communication port 304 and the second opening 204 while the second flow channel 202 is in communication with the fourth flow channel 302.

Alternatively, the number of the first communication ports 303 on the heat exchange plate 30 may be one or more, and the number of the second communication ports 304 may be one or more. Note that the number of the first communication ports 303 and the number of the second communication ports 304 may not be uniform.

Alternatively, the first communication port 303 and the second communication port 304 on the heat exchange plate 30 may be arranged along the length direction of the heat exchange plate 30, or the first communication port 303 and the second communication port 304 may be arranged in a staggered manner along the length direction of the heat exchange plate 30.

Correspondingly, the first openings 203 on the bottom plate 20 are arranged in a one-to-one correspondence with the number and positions of the first communication ports 303, and the second openings 204 are arranged in a one-to-one correspondence with the number and positions of the second communication ports 304.

It should be noted that, during assembly, the heat exchange plate 30 and the bottom plate 20 may be fixedly connected according to the corresponding relationship between the first opening 203 and the first communication port 303 and the corresponding relationship between the second opening 204 and the second communication port 304, then the battery cell 10 is placed in the box 120, and the battery cell 10 and the heat exchange plate 30 and/or the bottom plate 20 may be fixed by gluing, or the battery cell 10 and the heat exchange plate 30 may be fixedly connected (e.g. glued) together, and then the whole may be fixed on the bottom plate 20 according to the corresponding relationship between the first opening 203 and the first communication port 303 and the corresponding relationship between the second opening 204 and the second communication port 304.

Alternatively, both the inlet and outlet tubes 40, 50 may be in communication with a supply of heat exchange medium, enabling circulation of the heat exchange medium between the supply, the flow channels in the bottom plate 20 and the flow channels in the heat exchange plate 30.

Alternatively, the inlet tube 40 and the outlet tube 50 may be located on the same side of the bottom plate 20. By designing the liquid inlet pipe 40 and the liquid outlet pipe 50 on the same side of the bottom plate 20, the layout of the battery device is more reasonable, and the battery device can be conveniently disassembled and maintained.

In the above technical solution, the flow channels are formed in the bottom plate 20 of the box 120, and the flow channels can be communicated with the flow channels in the heat exchange plate 30 to form a circulation path of the heat exchange medium together, and the flow channels in the bottom plate 20 can exchange heat for the bottom surface of the battery cell 10, and the flow channels in the heat exchange plate 30 can exchange heat for the side surface of the battery cell 10, so that the heat dissipation efficiency of the battery device can be improved by exchanging heat for a plurality of surfaces of the battery cell 10. In addition, the bottom of the heat exchange plate 30 is provided with a communication port for inflow and outflow of heat exchange medium, so that pipelines on two sides of the heat exchange plate 30 in the length direction can be omitted, the occupied space of the pipelines in the box 120 is reduced, the inner space of the box 120 can be utilized more efficiently and reasonably, and the energy density of the battery device is improved.

Referring to fig. 10, fig. 10 is a schematic diagram illustrating a layout of a first type of flow channels in a base plate according to some embodiments of the present application.

In some embodiments, the first flow channel 201 is provided with an inlet and an outlet at both ends of its extension direction, the inlet 2011 of the first flow channel is in communication with the liquid inlet pipe 40, the second flow channel 202 is provided with an inlet and an outlet at both ends of its extension direction, the inlet 2021 of the second flow channel is in communication with the outlet 2012 of the first flow channel, and the outlet 2022 of the second flow channel is in communication with the liquid outlet pipe 50.

Specifically, the inlet 2011 of the first flow passage refers to a port through which the heat exchange medium starts to enter the first flow passage 201, the outlet 2012 of the first flow passage refers to a port through which the heat exchange medium flowing in the first flow passage 201 is discharged from the first flow passage 201, the inlet 2021 of the second flow passage refers to a port through which the heat exchange medium starts to enter the second flow passage 202, and the outlet 2022 of the second flow passage refers to a port through which the heat exchange medium flowing in the second flow passage 202 is discharged from the second flow passage 202.

It should be noted that, by disposing the inlet 2011 and the outlet of the first flow channel at two ends of the first flow channel 201 in the extending direction thereof, the heat exchange medium can flow through the entire first flow channel 201 and then enter the second flow channel 202, and similarly, by disposing the inlet 2021 and the outlet of the second flow channel at two ends of the second flow channel 202 in the extending direction thereof, the heat exchange medium can flow through the entire second flow channel 202 and then flow back to the liquid outlet pipe 50. With this structural design, the heat exchange medium can flow through more areas in the first flow channel 201 and the second flow channel 202, which helps to improve the heat exchange capacity of the bottom plate 20.

It should be understood that the first flow channel 201 and the second flow channel 202 are not limited to be communicated with each other at the end of each extending direction, but may be a middle section position of the first flow channel 201 and a middle section position of the second flow channel 202, and a specific communication position between the first flow channel 201 and the second flow channel 202 may be adjusted according to design requirements, which is not limited by the comparison of embodiments of the present application.

In the above technical solution, the first flow channel 201 and the second flow channel 202 in the bottom plate 20 are matched with the liquid inlet pipe 40 and the liquid outlet pipe 50, so as to form a circulation path of the heat exchange medium, and improve the heat exchange capability of the first flow channel 201 and the second flow channel 202 in the bottom plate 20, and further improve the heat dissipation efficiency of the bottom surface of the battery cell 10.

Referring to fig. 11, fig. 11 is a schematic diagram illustrating a layout of a second type of flow channels in a bottom plate according to some embodiments of the present application.

In some embodiments, a first spacer 205 is provided inside the bottom plate 20 to isolate the first flow channel 201 from the second flow channel 202.

Alternatively, the first flow channel 201 coincides with the extending direction of the second flow channel 202, and the first partition 205 may be provided to extend along the extending direction of the first flow channel 201 or the second flow channel 202 to partition the first flow channel 201 from the second flow channel 202.

Alternatively, the first spacer 205 may be integrally formed with the base plate 20.

Since the position of the flow channel in the heat exchange plate 30 is generally higher than the position of the flow channel in the bottom plate 20, when the heat exchange medium enters the third flow channel 301 in the heat exchange plate 30 from the first flow channel 201 in the bottom plate 20, it is necessary to push the heat exchange medium into the heat exchange plate 30 with a certain pressure. Therefore, by providing the first partition 205 to separate the first flow channel 201 and the second flow channel 202, a part of pressure will not leak due to the heat exchange medium directly entering the second flow channel 202 from the first flow channel 201, so that the pressure required for the heat exchange medium entering the heat exchange plate 30 can be quickly reached in the first flow channel 201, and the circulation efficiency of the heat exchange medium can be improved.

In the above technical solution, by providing the first partition 205, the first flow channel 201 and the second flow channel 202 are not directly connected in the bottom plate 20, so as to limit the heat exchange medium in the first flow channel 201 to flow into the second flow channel 202 only through the flow channel in the heat exchange plate 30 and form a circulation path of the heat exchange medium, so that the flow channel in the heat exchange plate 30 can flow through sufficient heat exchange medium, thereby improving the heat dissipation efficiency of the side surface of the battery cell 10.

Referring to fig. 12 to 19, fig. 12 is a schematic diagram of a layout of a third type of flow channel in a bottom plate according to some embodiments of the present application, fig. 13 is a schematic diagram of a layout of a fourth type of flow channel in a bottom plate according to some embodiments of the present application, fig. 14 is a schematic diagram of a layout of a fifth type of flow channel in a bottom plate according to some embodiments of the present application, fig. 15 is a schematic diagram of a layout of a sixth type of flow channel in a bottom plate according to some embodiments of the present application, fig. 16 is a schematic diagram of a layout of a seventh type of flow channel in a bottom plate according to some embodiments of the present application, fig. 17 is a schematic diagram of a layout of an eighth type of flow channel in a bottom plate according to some embodiments of the present application, fig. 18 is a schematic diagram of a layout of a ninth type of flow channel in a bottom plate according to some embodiments of the present application, and fig. 19 is a schematic diagram of a layout of a tenth type of flow channel in a bottom plate according to some embodiments of the present application.

In some embodiments, a second baffle 206 is disposed within the interior of the base plate 20 to divide the first flow channel 201 and/or the second flow channel 202 into a plurality of first sub-flow channels 207.

Wherein, the second separator 206 is disposed inside the bottom plate 20, at least the following cases are included:

1. As shown in fig. 12, the second separator 206 is provided only in the first flow passage 201, and the first flow passage 201 is partitioned into a plurality of first sub-flow passages 207.

2. As shown in fig. 13, the second separator 206 is provided only in the second flow passage 202, and the second flow passage 202 is partitioned into a plurality of first sub-flow passages 207.

3. As shown in fig. 14, second separators 206 are provided in both the first flow path 201 and the second flow path 202, each of the first flow path 201 and the second flow path 202 is partitioned into a plurality of first sub-flow paths 207, and the number of the first sub-flow paths 207 in both flow paths may be uniform or non-uniform.

In the above technical solution, by providing the second separator 206, on one hand, the heat exchange medium can be more uniformly distributed in the first flow channel 201 and/or the second flow channel 202, so as to improve the uniformity of heat exchange of the battery cell 10, and on the other hand, the structural strength of the first flow channel 201 and/or the second flow channel 202 can be enhanced, so that the overall structural strength of the bottom plate 20 and the box 120 can be enhanced.

Further, at least part of the first sub-flow channel 207 communicates end to end.

Wherein, at least part of the first sub-flow channels 207 are communicated end to end, at least comprising the following cases:

1. As shown in fig. 15, each of the first flow path 201 and the second flow path 202 is divided into a plurality of first sub-flow paths 207, all of the first sub-flow paths 207 in the first flow path 201 are communicated end to end, all of the first sub-flow paths 207 in the second flow path 202 are communicated end to end, and the first flow path 201 is communicated end to end with two first sub-flow paths 207 adjacent to each other in the second flow path 202. This may result in the flow channels in the bottom plate 20 being flow channels arranged in an S-shape.

2. As shown in fig. 16, the first flow path 201 and the second flow path 202 are each divided into a plurality of first sub-flow paths 207, all of the first sub-flow paths 207 in the first flow path 201 are communicated end to end, all of the first sub-flow paths 207 in the second flow path 202 are communicated end to end, but there is no communication between the first flow path 201 and the second flow path 202. This may be so that the first flow channel 201 and the second flow channel 202 in the bottom plate 20 are each flow channels arranged in an S-shape.

3. As shown in fig. 17, only the first flow path 201 is divided into a plurality of first sub-flow paths 207, and part or all of the first sub-flow paths 207 communicate end to end.

4. As shown in fig. 18, only the second flow passage 202 is partitioned into a plurality of first sub-flow passages 207, and part or all of the first sub-flow passages 207 are communicated end to end.

In the above technical solution, by arranging at least part of the first sub-channels 207 to be communicated end to end, part or all of the first sub-channels 207 can be sequentially communicated, so that the heat exchange medium can be guided to flow through most or all of the areas of the first channels 201 and/or the second channels 202, thereby improving the heat dissipation efficiency of the bottom surface of the battery cell 10.

Alternatively, as shown in fig. 19, the first flow channel 201 is divided by a second partition 206 into a plurality of first sub-flow channels 207 arranged side by side, and one end of the plurality of first sub-flow channels 207 in the first flow channel 201, which is close to the liquid inlet pipe 40, is communicated with the liquid inlet pipe 40, and/or the second flow channel 202 is divided by the second partition 206 into a plurality of first sub-flow channels 207 arranged side by side, and one end of the plurality of first sub-flow channels 207 in the second flow channel 202, which is close to the liquid outlet pipe 50, is communicated with the liquid outlet pipe 50.

The first flow channel 201 is divided into a plurality of first sub-flow channels 207 arranged side by the second partition 206, in the first flow channel 201, the extending direction of the plurality of first sub-flow channels 207 is consistent with that of the first flow channel 201, a split flow channel is arranged at one end of the first flow channel 201 near the liquid inlet pipe 40, the split flow channel can communicate the liquid inlet pipe 40 with one end of the plurality of first sub-flow channels 207 near the liquid inlet pipe 40 and distribute heat exchange medium passing through the liquid inlet pipe 40 into each first sub-flow channel 207, and one end of the plurality of first sub-flow channels 207 far from the liquid inlet pipe 40 can be communicated or not communicated with each other.

It can be appreciated that the second flow channel 202 is divided into a plurality of first sub-flow channels 207 disposed side by the second partition 206, and the arrangement of the plurality of first sub-flow channels 207 in the second flow channel 202 can be referred to the arrangement of the plurality of first sub-flow channels 207 in the first flow channel 201 above, which is not described herein.

In the above technical solution, by arranging the first flow channels 201 and/or the first sub-flow channels 207 in the second flow channels 202 side by side and communicating with the liquid inlet tube 40 or the liquid outlet tube 50, the flow channel design in the bottom plate 20 can be simplified, the processing is facilitated, and the plurality of first sub-flow channels 207 arranged side by side can limit the plurality of second partition boards 206 to be arranged side by side in the bottom plate 20, which is helpful for improving the overall structural strength of the bottom plate 20.

Referring to fig. 20, fig. 20 is a schematic diagram illustrating a layout of a first type of flow channels in a heat exchange plate according to some embodiments of the present application.

In some embodiments, the third flow passage 301 is provided with an inlet and an outlet at both ends in the extending direction thereof, the inlet 3011 of the third flow passage communicates with the first communication port 303, the fourth flow passage 302 is provided with an inlet and an outlet at both ends in the extending direction thereof, the inlet 3021 of the fourth flow passage communicates with the outlet 3012 of the third flow passage, and the outlet 3022 of the fourth flow passage communicates with the second communication port 304.

Specifically, the inlet 3011 of the third flow passage refers to a port through which the heat exchange medium starts to enter the third flow passage 301, the inlet 3011 of the third flow passage may be the first communication port 303, the outlet 3012 of the third flow passage refers to a port through which the heat exchange medium flowing in the third flow passage 301 is discharged from the third flow passage 301, the inlet 3021 of the fourth flow passage refers to a port through which the heat exchange medium starts to enter the fourth flow passage 302, the outlet 3022 of the fourth flow passage refers to a port through which the heat exchange medium flowing in the fourth flow passage 302 is discharged from the fourth flow passage 302, and the outlet 3022 of the fourth flow passage may be the second communication port 304.

It should be noted that, by disposing the inlet 3011 and the outlet of the third flow channel at both ends of the third flow channel 301 in the extending direction thereof, the heat exchange medium may flow through the entire third flow channel 301 and then enter the fourth flow channel 302, and similarly, by disposing the inlet 3021 and the outlet of the fourth flow channel at both ends of the fourth flow channel 302 in the extending direction thereof, the heat exchange medium may flow through the entire fourth flow channel 302 and then flow back into the second flow channel 202. By adopting the structural design, the heat exchange medium can flow through more areas in the third flow passage 301 and the fourth flow passage 302, and the heat exchange capacity of the heat exchange plate 30 can be improved.

It should be understood that the third flow channel 301 and the fourth flow channel 302 are not limited to be connected at the end portions of the respective extending directions, and may be a middle section position of the third flow channel 301 and a middle section position of the fourth flow channel 302, and a specific connection position between the third flow channel 301 and the fourth flow channel 302 may be adjusted according to design requirements, which is not limited by comparison of embodiments of the present application.

In the above technical solution, the communication position between the third flow channel 301 and the fourth flow channel 302 is set at a position far away from the first communication port 303 and the second communication port 304, so that the heat exchange medium can flow through most or all of the areas in the heat exchange plate 30, so as to improve the heat dissipation efficiency of the side surface of the battery cell 10.

Referring to fig. 21 to 25, fig. 21 is a schematic diagram of a layout of a second type of flow channels in a heat exchange plate according to some embodiments of the present application, fig. 22 is a schematic diagram of a layout of a third type of flow channels in a heat exchange plate according to some embodiments of the present application, fig. 23 is a schematic diagram of a layout of a fourth type of flow channels in a heat exchange plate according to some embodiments of the present application, fig. 24 is a schematic diagram of a layout of a fifth type of flow channels in a heat exchange plate according to some embodiments of the present application, and fig. 25 is a schematic diagram of a layout of a sixth type of flow channels in a heat exchange plate according to some embodiments of the present application.

In some embodiments, a third separator 305 is disposed within the heat exchange plate 30 to divide the third flow channel 301 and/or the fourth flow channel 302 into a plurality of second sub-flow channels 306.

Wherein, the third separator 305 is disposed inside the heat exchange plate 30, at least including the following cases:

1. as shown in fig. 21, the third separator 305 is provided only in the third flow path 301, and the third flow path 301 is divided into a plurality of second sub-flow paths 306.

2. As shown in fig. 22, the third separator 305 is provided only in the fourth flow passage 302, and the fourth flow passage 302 is divided into a plurality of second sub-flow passages 306.

3. As shown in fig. 23, a third separator 305 is provided in each of the third flow path 301 and the fourth flow path 302, each of the third flow path 301 and the fourth flow path 302 is partitioned into a plurality of second sub-flow paths 306, and the number of the second sub-flow paths 306 in both flow paths may be uniform or non-uniform.

In the above technical solution, by providing the third separator 305, on one hand, the heat exchange medium can be more uniformly distributed in the third flow channel 301 and/or the fourth flow channel 302, so as to improve the uniformity of heat exchange of the battery cell 10, and on the other hand, the structural strength of the third flow channel 301 and/or the fourth flow channel 302 can be further enhanced, so that the overall structural strength of the heat exchange plate 30 can be further enhanced.

Further, at least a portion of the second sub-flow passage 306 communicates end-to-end.

Wherein at least part of the second sub-channels 306 are in end-to-end communication, at least including the following cases:

1. As shown in fig. 24, each of the third flow path 301 and the fourth flow path 302 is divided into a plurality of second sub-flow paths 306, all of the second sub-flow paths 306 in the third flow path 301 are in end-to-end communication, all of the second sub-flow paths 306 in the fourth flow path 302 are in end-to-end communication, and the third flow path 301 is in end-to-end communication with two second sub-flow paths 306 adjacent to each other in the fourth flow path 302. This may result in the flow channels in the heat exchanger plate 30 being flow channels arranged in an S-shape.

2. Only the third flow channel 301 is divided into a plurality of second sub-flow channels 306, and part or all of the second sub-flow channels 306 are communicated end to end.

3. Only the fourth flow passage 302 is divided into a plurality of second sub-flow passages 306, and some or all of the second sub-flow passages 306 communicate end to end.

In the above technical solution, at least part of the second sub-channels 306 are connected end to end, so that part or all of the second sub-channels 306 can be sequentially connected, and then the heat exchange medium can be guided to flow through most or all areas of the third channel 301 and/or the fourth channel 302, so as to improve the heat dissipation efficiency of the side surface of the battery cell 10.

Alternatively, as shown in fig. 25, the third flow path 301 is divided by a third partition 305 into a plurality of second sub-flow paths 306 arranged side by side, one end of the plurality of second sub-flow paths 306 in the third flow path 301 near the first communication port 303 is communicated with the first communication port 303, and one end of the plurality of second sub-flow paths 306 in the third flow path 301 far from the first communication port 303 is communicated with the fourth flow path 302, and/or the fourth flow path 302 is divided by the third partition 305 into a plurality of second sub-flow paths 306 arranged side by side, one end of the plurality of second sub-flow paths 306 in the fourth flow path 302 near the second communication port 304 is communicated with the second communication port 304, and one end of the plurality of second sub-flow paths 306 in the fourth flow path 302 far from the second communication port 304 is communicated with the third flow path 301.

The third flow channel 301 is divided by the third partition plate 305 into a plurality of second sub-flow channels 306 disposed side by side, which may be that, in the third flow channel 301, an extending direction of the plurality of second sub-flow channels 306 is identical to an extending direction of the third flow channel 301, a split channel is disposed at an end of the third flow channel 301 near the first communication port 303, the split channel may communicate the first communication port 303 with an end of the plurality of second sub-flow channels 306 near the first communication port 303 and distribute the heat exchange medium passing through the first communication port 303 into each of the second sub-flow channels 306, and an end of the plurality of second sub-flow channels 306 far from the first communication port 303 may communicate with each other and may guide the heat exchange medium into the fourth flow channel 302 through the end.

It should be noted that, a collecting channel may be disposed at an end of the plurality of second sub-channels 306 in the third flow channel 301 away from the first communication port 303, and the collecting channel may collect the heat exchange medium in each of the second sub-channels 306 and guide the heat exchange medium into the fourth flow channel 302. The position of the collecting channel is generally higher than that of the first communication port 303, and the heat exchange medium can flow upwards into the collecting channel through the first communication port 303 under a certain pressure.

Alternatively, the current collecting channels may be correspondingly disposed at the sides of the battery cells 10 near the poles. In the side of the battery cell 10, heat at a position close to the pole is concentrated, and the collecting channels can collect heat exchange media in each second sub-flow channel 306, so that the heat exchange media are sufficient, and can pertinently exchange heat at a position with high heat at the side of the battery cell 10, and the heat exchange media flow from the collecting channels to the fourth flow channel 302 at a higher speed, so that the heat exchange efficiency of the side of the battery cell 10 close to the pole can be improved.

It is understood that the fourth flow channel 302 is divided into a plurality of second sub-flow channels 306 disposed side by the third partition 305, and the arrangement of the plurality of second sub-flow channels 306 in the fourth flow channel 302 may refer to the arrangement of the plurality of second sub-flow channels 306 in the third flow channel 301, which is not described herein.

In the above technical solution, by arranging the plurality of second sub-channels 306 in the third channel 301 and/or the fourth channel 302 in parallel and communicating with the first communication port 303 or the second communication port 304, the channel design in the heat exchange plate 30 can be simplified, the processing is facilitated, and the plurality of second sub-channels 306 arranged side by side can limit the plurality of third partition boards 305 to be arranged side by side in the heat exchange plate 30, which is helpful for improving the overall structural strength of the heat exchange plate 30.

Referring to fig. 26 and 27, fig. 26 is a schematic diagram illustrating a layout of an eleventh flow channel in the bottom plate according to some embodiments of the present application, and fig. 27 is a schematic diagram illustrating a layout of a seventh flow channel in the heat exchange plate according to some embodiments of the present application.

In some embodiments, the first flow channels 201 and the second flow channels 202 are alternately arranged along the length of the heat exchange plate 30, as shown in FIG. 26, and/or the third flow channels 301 and the fourth flow channels 302 are alternately arranged along the length of the heat exchange plate 30, as shown in FIG. 27.

Optionally, each first flow channel 201 is respectively and correspondingly provided with one liquid inlet pipe 40, or at least part of the first flow channels 201 are commonly connected with a collecting channel, and the collecting channel can be communicated with one or more liquid inlet pipes 40.

Optionally, each of the second flow channels 202 is respectively provided with a liquid outlet pipe 50, or at least part of the second flow channels 202 are commonly connected with a collecting channel, and the collecting channel can be communicated with one or more liquid outlet pipes 50.

It should be noted that, in the working state, the heat in the middle area of the bottom surface of the battery cell 10 is generally greater than the heat in the side area of the bottom surface of the battery cell 10, and the first flow channel 201 is in communication with the liquid inlet tube 40, and the second flow channel 202 is in communication with the liquid outlet tube 50, so that the temperature of the heat exchange medium in the first flow channel 201 is generally lower than the temperature of the heat exchange medium in the second flow channel 202.

In the above technical solution, by arranging the first flow channels 201 and the second flow channels 202 alternately, the first flow channels 201 can be correspondingly arranged in the middle area of the bottom surface of each battery cell 10, and the second flow channels 202 can be arranged in the side area of the bottom surface of each battery cell 10, so that the heat exchange uniformity of the bottom surface of each battery cell 10 in the box 120 can be improved.

Alternatively, the third flow channels 301 are disposed in one-to-one correspondence with the first flow channels 201, and the fourth flow channels 302 are disposed in one-to-one correspondence with the second flow channels 202.

Optionally, each third flow channel 301 is respectively and correspondingly provided with a first communication port 303, or at least part of the third flow channels 301 are commonly connected with a collecting channel, and the collecting channel can be communicated with one or more first communication ports 303.

Optionally, each fourth flow channel 302 is respectively and correspondingly provided with a second communication port 304, or at least part of the fourth flow channels 302 are commonly connected with a collecting channel, and the collecting channel can be communicated with one or more second communication ports 304.

It should be noted that, in the operating state, the heat in the side middle area of the battery cell 10 is generally greater than the heat in the side area of the battery cell 10, the third flow channel 301 is in communication with the first flow channel 201, the fourth flow channel 302 is in communication with the second flow channel 202, and the third flow channel 301 is closer to the inlet end of the heat exchange medium than the fourth flow channel 302, so that the temperature of the heat exchange medium in the third flow channel 301 is generally lower than the temperature of the heat exchange medium in the fourth flow channel 302.

In the above technical solution, by arranging the third flow channels 301 and the fourth flow channels 302 alternately, the third flow channels 301 may be correspondingly arranged in the middle area of the side surface of each battery cell 10, and the fourth flow channels 302 may be arranged in the side edge area of the side surface of each battery cell 10, so as to improve the uniformity of heat exchange of the side surface of each battery cell 10 in the case 120.

Referring to fig. 28 and 29, fig. 28 is a schematic diagram illustrating a layout of a twelfth flow channel in the bottom plate according to some embodiments of the present application, and fig. 29 is a schematic diagram illustrating a layout of an eighth flow channel in the heat exchange plate according to some embodiments of the present application.

In some embodiments, as shown in FIG. 28, the second flow channel 202 is disposed at least one end of the bottom plate 20 in the length direction of the heat exchange plate 30, and/or, as shown in FIG. 29, the fourth flow channel 302 is disposed at least one end of the heat exchange plate 30 in the length direction of the heat exchange plate 30.

Optionally, the fourth flow channels 302 are disposed in one-to-one correspondence with the second flow channels 202.

In the battery device, the operating temperature of the battery cell 10 located in the end region is generally lower than the operating temperature of the battery cell 10 located in the middle region, the temperature of the heat exchange medium in the first flow channel 201 is generally lower than the temperature of the heat exchange medium in the second flow channel 202, and the temperature of the heat exchange medium in the third flow channel 301 is generally lower than the temperature of the heat exchange medium in the fourth flow channel 302.

In the above technical solution, the second flow channel 202 is disposed at least one end of the bottom plate 20, and the first flow channel 201 may be disposed in a middle area of the bottom plate 20, so that the second flow channel 202 may be disposed correspondingly on a bottom surface of the battery cell 10 located in an end side area of the battery device, and the first flow channel 201 may be disposed correspondingly on a bottom surface of the battery cell 10 located in a middle area of the battery device, so that heat exchange can be more reasonably performed on bottom surfaces of the battery cells 10 in different areas of the battery device, and overall heat exchange uniformity of the battery device may be improved.

Similarly, by arranging the fourth flow channel 302 at least one end of the heat exchange plate 30, and the third flow channel 301 may be arranged in a middle area of the heat exchange plate 30, so that the fourth flow channel 302 may be correspondingly arranged on a side surface of the battery cell 10 located in an end side area in the battery device, and the third flow channel 301 may be correspondingly arranged on a side surface of the battery cell 10 located in a middle area in the battery device, so that heat exchange may be more reasonably performed on side surfaces of the battery cells 10 located in different areas in the battery device, and overall heat exchange uniformity of the battery device may be improved.

Referring to fig. 30 to 32, fig. 30 is a schematic view of a perspective view of an angle of an adapter according to some embodiments of the present application, fig. 31 is a schematic view of a perspective view of another angle of an adapter according to some embodiments of the present application, and fig. 32 is a schematic view of an assembly relationship between an adapter, a heat exchange plate, and a bottom plate according to some embodiments of the present application.

In some embodiments, as shown in fig. 32, the first communication port 303 and the first opening 203 and the second communication port 304 and the second opening 204 are sealingly abutted by the adapter 60.

Further, as shown in fig. 30 and 31, the adapter 60 includes a pipe body, the pipe body is divided into an upper pipe section 602 and a lower pipe section 603, the upper pipe section 602 is configured to be inserted into the first communication port 303 and the second communication port 304, respectively, the lower pipe section 603 is configured to be inserted into the first opening 203 and the second opening 204, respectively, and the pipe body has a communication hole 604 for communicating the first communication port 303 with the first opening 203 and communicating the second communication port 304 with the second opening 204.

Alternatively, the outer peripheral surface of the upper pipe section 602 of the adapter 60 is matched with the inner peripheral surface of the first communication port 303 or the second communication port 304, so that the upper pipe section 602 can be inserted into the first communication port 303 or the second communication port 304 in an adaptive manner, the outer peripheral surface of the lower pipe section 603 of the adapter 60 is matched with the inner peripheral surface of the first opening 203 or the second opening 204, so that the lower pipe section 603 can be inserted into the first opening 203 or the second opening 204 in an adaptive manner, and the connection tightness between the first communication port 303 and the first opening 203 and between the second communication port 304 and the second opening 204 can be improved by adapting the upper pipe section 602 and the lower pipe section 603 of the adapter 60.

Alternatively, a sealant may be filled between the outer circumferential surface of the upper pipe section 602 of the adapter 60 and the inner circumferential surface of the first communication port 303 or the second communication port 304, and between the outer circumferential surface of the lower pipe section 603 of the adapter 60 and the inner circumferential surface of the first opening 203 or the second opening 204, to further enhance the connection sealability between the heat exchange plate 30 and the bottom plate 20.

Further, as shown in fig. 30 and 31, the adapter 60 further includes a flange 601 provided around the outer periphery of the tube body, and the flange 601 has a first abutment surface 6011 and a second abutment surface 6012, wherein the first abutment surface 6011 is configured to be able to abut against a surface of the heat exchange plate 30 facing the bottom plate 20, and the second abutment surface 6012 is configured to be able to abut against a surface of the bottom plate 20 facing the heat exchange plate 30.

Optionally, the flange 601 of the adapter 60 is in a ring configuration.

Alternatively, the first abutment surface 6011 and the second abutment surface 6012 are two surfaces disposed opposite each other on the flange 601.

Optionally, a sealant may be filled between the surfaces of the first abutting surface 6011 and the heat exchange plate 30, and between the surfaces of the second abutting surface 6012 and the bottom plate 20, so as to further improve the connection tightness between the heat exchange plate 30 and the bottom plate 20.

Alternatively, the first and second abutment surfaces 6011, 6012 may be planar or provided with a raised surface.

It should be noted that, during assembly, the adapter 60 may be fixed at the communication port of the heat exchange plate 30, and then the lower tube section 603 of the adapter 60 is abutted with the opening on the bottom plate 20, so as to realize positioning assembly between the heat exchange plate 30 and the bottom plate 20. Or during assembly, the adapter 60 can be fixed at the opening of the bottom plate 20, and then the upper pipe section 602 of the adapter 60 is used for butt joint with the communication port on the heat exchange plate 30, so as to realize positioning assembly between the heat exchange plate 30 and the bottom plate 20.

In the above technical solution, the adapter 60 is arranged between the bottom plate 20 and the heat exchange plate 30 for butt joint, so that the heat exchange plate 30 can be positioned and assembled on the bottom plate 20, and the tightness between the opening of the bottom plate 20 and the communication port of the heat exchange plate 30 can be improved.

Further, the adapter 60 is a rubber member.

In the above technical solution, the adaptor 60 is designed as a rubber member, so that the tightness between the opening of the bottom plate 20 and the communication port of the heat exchange plate 30 can be further improved.

Referring to fig. 33 and 34, fig. 33 is a schematic diagram of an assembly relationship between a first positioning tube and a heat exchange plate, and between a second positioning tube and a bottom plate, according to some embodiments of the present application, and between a second positioning tube and a heat exchange plate, and between a second positioning tube and a bottom plate, respectively, according to some embodiments of the present application.

In some embodiments, the side of the base plate 20 facing the mounting cavity is provided with a first positioning tube 70, the first positioning tube 70 is connected to the outer circumferences of the first opening 203 and the second opening 204, the first positioning tube 70 is configured to be inserted into the first communication opening 303 and the second communication opening 304, respectively, or the side of the heat exchange plate 30 facing the base plate 20 is provided with a second positioning tube 80, the second positioning tube 80 is connected to the outer circumferences of the first communication opening 303 and the second communication opening 304, and the second positioning tube 80 is configured to be inserted into the first opening 203 and the second opening 204, respectively.

Alternatively, the first positioning tube 70 and the bottom plate 20 may be fastened, glued or integrally formed.

Alternatively, the outer circumferential surface of the first positioning tube 70 is matched with the inner circumferential surface of the first communication port 303 or the second communication port 304, and a sealant may be filled between the outer circumferential surface of the first positioning tube 70 and the inner circumferential surface of the first communication port 303 or the second communication port 304.

Alternatively, the second positioning tube 80 and the heat exchange plate 30 may be fastened, fixed by gluing, or integrally formed.

Alternatively, the outer circumferential surface of the second positioning tube 80 is matched with the inner circumferential surface of the first opening 203 or the second opening 204, and a sealant may be filled between the outer circumferential surface of the second positioning tube 80 and the inner circumferential surface of the first opening 203 or the second opening 204.

In the above technical solution, by arranging the first positioning tube 70 on the bottom plate 20 or arranging the second positioning tube 80 on the heat exchange plate 30, the bottom plate 20 and the heat exchange plate 30 can be positioned and assembled, so as to reduce the assembly difficulty and improve the assembly efficiency.

Referring to fig. 3 and 5, in some embodiments, the housing 120 further includes a sidewall 90, the sidewall 90 and the bottom plate 20 together defining a mounting cavity, and the heat exchanger plate 30 is connected to the sidewall 90 at its lengthwise ends.

Alternatively, the heat exchange plate 30 is provided with two end portions in its length direction, at least one of which may be fixedly connected with the side wall 90.

Alternatively, two surfaces disposed opposite to each other between the heat exchange plate 30 and the side wall 90 may abut against each other to achieve connection between the heat exchange plate 30 and the side wall 90.

Alternatively, the connection between the heat exchange plate 30 and the side wall 90 may be a bolt lock, a snap fit, an adhesive fit, or the like.

In the above-described embodiments, the end of the heat exchange plate 30 is connected to the side wall 90 of the case 120, so that the overall structural strength of the battery device can be improved.

Referring to fig. 3 to 34, the battery device provided by the embodiment of the present application includes a liquid inlet pipe 40, a liquid outlet pipe 50, a case 120 having an installation cavity, and a battery cell 10 and a heat exchange plate 30 accommodated in the installation cavity. The case 120 includes a bottom plate 20, a first flow channel 201 and a second flow channel 202 for flowing a heat exchange medium are formed inside the bottom plate 20, the first flow channel 201 is communicated with the liquid inlet pipe 40, the second flow channel 202 is communicated with the liquid outlet pipe 50, the bottom plate 20 is contacted with the bottom surface 102 of the battery cell 10 and can exchange heat with the bottom surface 102 of the battery cell 10, a first opening 203 and a second opening 204 are formed on one side of the bottom plate 20 facing the battery cell 10, the first opening 203 is communicated with the first flow channel 201, the second opening 204 is communicated with the second flow channel 202, a third flow channel 301 and a fourth flow channel 302 for flowing the heat exchange medium and communicated with each other are formed inside the heat exchange plate 30, the heat exchange plate 30 is contacted with the side surface of the battery cell 10 and can exchange heat with the side surface of the battery cell 10, the heat exchange plate 30 is connected to the bottom plate 20, a first communication opening 303 and a second communication opening 304 are formed on one side of the heat exchange plate 30 facing the bottom plate 20, the first communication opening 303 is in sealed butt joint with the first opening 203 to communicate the first flow channel 201 with the third flow channel 301, the second communication opening 204 is in communication with the second communication opening 204 is in butt joint with the second communication opening 204 to communicate with the second flow channel 302. The first flow passage 201 is provided with an inlet and an outlet at both ends in the extending direction thereof, the inlet 2011 of the first flow passage communicates with the liquid inlet pipe 40, the second flow passage 202 is provided with an inlet and an outlet at both ends in the extending direction thereof, the inlet 2021 of the second flow passage communicates with the outlet 2012 of the first flow passage, and the outlet 2022 of the second flow passage communicates with the liquid outlet pipe 50. A second baffle 206 is disposed within the base plate 20 to divide the first flow channel 201 and/or the second flow channel 202 into a plurality of first sub-flow channels 207. The first flow channel 201 is divided into a plurality of first sub-flow channels 207 arranged side by the second partition 206, one end of the plurality of first sub-flow channels 207 in the first flow channel 201, which is close to the liquid inlet pipe 40, is communicated with the liquid inlet pipe 40, and/or the second flow channel 202 is divided into a plurality of first sub-flow channels 207 arranged side by the second partition 206, and one end of the plurality of first sub-flow channels 207 in the second flow channel 202, which is close to the liquid outlet pipe 50, is communicated with the liquid outlet pipe 50. The third flow passage 301 is provided with an inlet and an outlet at both ends in the extending direction thereof, the inlet 3011 of the third flow passage communicates with the first communication port 303, the fourth flow passage 302 is provided with an inlet and an outlet at both ends in the extending direction thereof, the inlet 3021 of the fourth flow passage communicates with the outlet 3012 of the third flow passage, and the outlet 3022 of the fourth flow passage communicates with the second communication port 304. A third separator 305 is provided inside the heat exchange plate 30 to divide the third flow passage 301 and/or the fourth flow passage 302 into a plurality of second sub-flow passages 306. The third flow channel 301 is divided into a plurality of second sub-flow channels 306 arranged side by a third partition plate 305, one end of the plurality of second sub-flow channels 306 in the third flow channel 301 close to the first communication port 303 is communicated with the first communication port 303, one end of the plurality of second sub-flow channels 306 in the third flow channel 301 far away from the first communication port 303 is communicated with the fourth flow channel 302, and/or the fourth flow channel 302 is divided into a plurality of second sub-flow channels 306 arranged side by the third partition plate 305, one end of the plurality of second sub-flow channels 306 in the fourth flow channel 302 close to the second communication port 304 is communicated with the second communication port 304, and one end of the plurality of second sub-flow channels 306 in the fourth flow channel 302 far away from the second communication port 304 is communicated with the third flow channel 301. The second flow channel 202 is provided at least one end of the bottom plate 20 in the length direction of the heat exchange plate 30, and/or the fourth flow channel 302 is provided at least one end of the heat exchange plate 30 in the length direction of the heat exchange plate 30. The first communication port 303 and the first opening 203 and the second communication port 304 and the second opening 204 are in sealing butt joint through the adapter 60. The adapter 60 includes a pipe body and a flange 601 provided around the pipe body, the pipe body is divided into an upper pipe section 602 and a lower pipe section 603, the upper pipe section 602 is configured to be insertable into the first communication port 303 and the second communication port 304, the lower pipe section 603 is configured to be insertable into the first opening 203 and the second opening 204, the pipe body has a communication hole 604 for communicating the first communication port 303 with the first opening 203 and communicating the second communication port 304 with the second opening 204, the flange 601 has a first abutment surface 6011 and a second abutment surface 6012, the first abutment surface 6011 is configured to be able to abut against a surface of the heat exchange plate 30 facing the side of the bottom plate 20, and the second abutment surface 6012 is configured to be able to abut against a surface of the bottom plate 20 facing the side of the installation cavity. The inlet tube 40 is located on the same side of the bottom plate 20 as the outlet tube 50. The housing 120 further includes a sidewall 90, the sidewall 90 and the bottom plate 20 together defining a mounting cavity, and the heat exchange plate 30 is connected to the sidewall 90 at its longitudinal ends.

In the above technical solution, by adopting the battery device in the first aspect, the electric device can omit the pipelines on both sides of the heat exchange plate 30 in the length direction thereof, thereby reducing the occupied space of the pipelines in the box 120, and can more efficiently and reasonably utilize the internal space of the box 120 to improve the energy density of the battery device, and heat exchange is performed on a plurality of surfaces of the battery cell 10 by the bottom plate 20 and the heat exchange plate 30, so that the heat dissipation efficiency of the battery device can be improved.

In the above technical solution, the energy storage device can omit the pipelines on both sides of the heat exchange plate 30 in the length direction by adopting the battery device in the first aspect, thereby reducing the occupied space of the pipelines in the box 120, more efficiently and reasonably utilizing the internal space of the box 120 to improve the energy density of the battery device, and improving the heat dissipation efficiency of the battery device by exchanging heat between the bottom plate 20 and the heat exchange plate 30 on a plurality of surfaces of the battery cell 10.

The foregoing description of various embodiments is intended to highlight differences between the various embodiments, which may be the same or similar to each other by reference, and is not repeated herein for the sake of brevity.

It should be noted that the above embodiments are only used to illustrate the technical solution of the present application, but not to limit the technical solution of the present application, and although the detailed description of the present application is given with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present application, and all the modifications or substitutions are included in the scope of the claims and the specification of the present application. The present application is not limited to the specific embodiments applied herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that it comprises an inlet pipe, an outlet pipe, a housing having a mounting cavity, and a battery cell and a heat exchange plate housed within the mounting cavity;

The housing includes a bottom plate, and the bottom plate has a first flow channel and a second flow channel formed inside for the flow of heat exchange medium. The first flow channel is connected to the liquid inlet pipe, and the second flow channel is connected to the liquid outlet pipe. The bottom plate is in contact with the bottom surface of the battery cell and can exchange heat with the bottom surface of the battery cell.

The base plate has a first opening and a second opening on the side facing the battery cell. The first opening is connected to the first flow channel, and the second opening is connected to the second flow channel.

The heat exchange plate is provided with a third flow channel and a fourth flow channel inside for the flow of heat exchange medium and they are interconnected. The heat exchange plate is in contact with the side of the battery cell and can exchange heat with the side of the battery cell.

The heat exchange plate is connected to the base plate, and the heat exchange plate has a first communication port and a second communication port on the side facing the base plate.

Wherein, the first connecting port is sealed and connected to the first opening to connect the first flow channel and the third flow channel; and the second connecting port is sealed and connected to the second opening to connect the second flow channel and the fourth flow channel.

2. The battery device according to claim 1, characterized in that,

The first flow channel has an inlet and an outlet at both ends in its extending direction, and the inlet of the first flow channel is connected to the liquid inlet pipe;

The second flow channel has an inlet and an outlet at both ends in its extension direction. The inlet of the second flow channel is connected to the outlet of the first flow channel, and the outlet of the second flow channel is connected to the liquid outlet pipe.

3. The battery device according to claim 1, characterized in that,

The base plate has a first partition inside to isolate the first flow channel from the second flow channel.

4. The battery device according to claim 1, characterized in that,

The base plate is provided with a second partition to divide the first flow channel and/or the second flow channel into a plurality of first sub-flow channels.

5. The battery device according to claim 4, characterized in that,

At least part of the first sub-channel is connected end to end.

6. The battery device according to claim 4, characterized in that,

The first flow channel is divided into multiple first sub-flow channels arranged side by side by the second partition, and the ends of the multiple first sub-flow channels within the first flow channel near the inlet pipe are all connected to the inlet pipe; and/or,

The second flow channel is divided into multiple first sub-flow channels arranged side by side by the second partition. The ends of the multiple first sub-flow channels in the second flow channel that are close to the liquid outlet pipe are all connected to the liquid outlet pipe.

7. The battery device according to claim 1, characterized in that,

The third flow channel has an inlet and an outlet at both ends in its extension direction, and the inlet of the third flow channel is connected to the first communication port.

The fourth flow channel has an inlet and an outlet at both ends in its extension direction. The inlet of the fourth flow channel is connected to the outlet of the third flow channel, and the outlet of the fourth flow channel is connected to the second connection port.

8. The battery device according to claim 1, characterized in that,

The heat exchange plate is provided with a third baffle to divide the third flow channel and/or the fourth flow channel into a plurality of second sub-flow channels.

9. The battery device according to claim 8, characterized in that,

At least part of the second sub-channel is connected end to end.

10. The battery device according to claim 8, characterized in that,

The third flow channel is divided into multiple second sub-flow channels arranged side by side by the third partition. The ends of each of the multiple second sub-flow channels within the third flow channel closest to the first connecting opening are connected to the first connecting opening, and the ends of each of the multiple second sub-flow channels within the third flow channel furthest from the first connecting opening are connected to the fourth flow channel; and/or,

The fourth flow channel is divided into multiple second sub-flow channels arranged side by side by the third partition. The ends of the multiple second sub-flow channels in the fourth flow channel that are closer to the second connecting port are all connected to the second connecting port, and the ends of the multiple second sub-flow channels in the fourth flow channel that are farther away from the second connecting port are all connected to the third flow channel.

11. The battery device according to claim 1, characterized in that,

The first flow channel and the second flow channel are arranged alternately along the length of the heat exchange plate; and/or,

The third flow channel and the fourth flow channel are arranged alternately along the length of the heat exchange plate.

12. The battery device according to claim 1, characterized in that,

The second flow channel is disposed at at least one end of the base plate along the length of the heat exchange plate; and/or,

The fourth flow channel is disposed at at least one end of the heat exchange plate along its length.

13. The battery device according to any one of claims 1-12, characterized in that,

The first connecting port and the first opening, as well as the second connecting port and the second opening, are sealed and connected by an adapter.

14. The battery device according to claim 13, characterized in that,

The adapter includes a tube body;

The pipe body is divided into an upper pipe section and a lower pipe section. The upper pipe section is configured to be inserted into the first connecting port and the second connecting port respectively, and the lower pipe section is configured to be inserted into the first opening and the second opening respectively.

The tube has a connecting hole for connecting the first connecting port with the first opening and for connecting the second connecting port with the second opening.

15. The battery device according to claim 14, characterized in that,

The adapter also includes a flange surrounding the outer periphery of the tube body;

The flange has a first abutting surface and a second abutting surface, the first abutting surface being configured to abut against the surface of the heat exchange plate facing the base plate, and the second abutting surface being configured to abut against the surface of the base plate facing the heat exchange plate.

16. The battery device according to claim 13, characterized in that,

The adapter is a rubber component.

17. The battery device according to any one of claims 1-12, characterized in that,

A first positioning tube is provided on the side of the base plate facing the mounting cavity. The first positioning tube is connected to the outer periphery of the first opening and the second opening, and is configured to be inserted into the first communication port and the second communication port respectively; or...

A second positioning tube is provided on the side of the heat exchange plate facing the base plate. The second positioning tube is connected to the outer periphery of the first communication port and the second communication port. The second positioning tube is configured to be able to be inserted into the first opening and the second opening respectively.

18. The battery device according to any one of claims 1-12, characterized in that,

The housing also includes a side wall, which, together with the bottom plate, defines the mounting cavity.

The heat exchange plate is connected to the side wall at its end along its length.

19. An electrical appliance, characterized in that it includes a battery device as claimed in any one of claims 1-18, the battery device being used to provide electrical energy.

20. An energy storage device, characterized in that it includes a battery device as described in any one of claims 1-18, the battery device being used to store electrical energy.