Water cooling plate assembly, water cooling system, battery, box body of battery and power utilization device

Abstract

The utility model provides a water cooling plate assembly, a water cooling system, a battery, a box body of the battery and an electric device, and the water cooling plate assembly comprises a harmonica-shaped tube plate, a first current collector and a second current collector. An outer-layer cooling channel and an inner-layer cooling channel located on the inner side of the outer-layer cooling channel are formed in the harmonica-shaped tube plate, and one of the outer-layer cooling channel and the inner-layer cooling channel is a liquid cooling channel. The first current collector is arranged at the first end of the harmonica-shaped tube plate in the length direction and forms a first current collecting space communicated with a port in one end of the liquid cooling channel, and the first current collector further forms a first liquid inlet and a first liquid outlet through which cooling liquid flows in and out of the first current collecting space. The second current collector is arranged at a second end in the length direction of the harmonica-shaped tube plate and forms a second current collecting space communicated with a port at the other end of the liquid cooling channel; and the second current collector further forms a second liquid inlet and a second liquid outlet through which the cooling liquid flows in and out of the second current collecting space.

Description

[0001] Cross-reference

[0002] This application claims priority to Chinese Patent Application No. 202210401809.X, filed on April 18, 2022, with the title "Water Cooling Plate Assembly, Water Cooling System, Battery and Its Case, and Electric Device", which is hereby incorporated by reference in its entirety into this application. Technical Field

[0003] This application relates to the technical field of batteries, and particularly to a water cooling plate assembly, a water cooling system, a battery and its case, and an electric device. Background Art

[0004] Currently, from the perspective of the development of the market situation, the application of power batteries is becoming more and more widespread. Power batteries are not only used in energy storage power systems such as hydraulic, thermal, wind, and solar power stations, but also widely used in electric transportation such as electric bicycles, electric motorcycles, and electric vehicles, as well as in multiple fields such as military equipment and aerospace. With the continuous expansion of the application fields of power batteries, the market demand is also increasing continuously.

[0005] During the use of the battery, the battery cells inside the battery will generate heat. If this heat is too high, it will have an adverse impact on the performance and service life of the battery. Therefore, how to effectively dissipate heat from the battery cells has become an important research direction in this field. Summary of the Invention

[0006] This application aims to at least solve one of the technical problems existing in the prior art. For this reason, an object of this application is to propose a water cooling plate assembly to improve the cooling effect on the battery cells in the battery.

[0007] An embodiment of the first aspect of this application provides a water cooling plate assembly, including: a corrugated tube plate, inside which an outer cooling channel and an inner cooling channel located inside the outer cooling channel are formed, and both the outer cooling channel and the inner cooling channel extend along the length direction of the corrugated tube plate. Among them, one of the outer cooling channel and the inner cooling channel is a liquid cooling channel; a first current collector, disposed at a first end in the length direction of the corrugated tube plate and forming a first current collecting space communicating with one end port of the liquid cooling channel, and the first current collector also forms a first liquid inlet and a first liquid outlet for the coolant to flow into and out of the first current collecting space; and a second current collector, disposed at a second end opposite to the first end in the length direction of the corrugated tube plate and forming a second current collecting space communicating with the other end port of the liquid cooling channel, and the second current collector also forms a second liquid inlet and a second liquid outlet for the coolant to flow into and out of the second current collecting space.

[0008] In the technical solution of the embodiment of the present application, the mouthpiece tube plate of the water-cooling plate assembly has an inner and an outer layer of cooling channels, and one of the layers can be a non-liquid-cooling channel. Since the non-liquid-cooling channel is not filled with coolant inside, the channel wall can be appropriately deformed towards the internal space of the channel, so that both sides in the thickness direction of the mouthpiece tube plate can absorb the expansion of the battery cell, avoiding damage to the battery cell caused by extrusion.

[0009] In some embodiments, the outer cooling channel is a liquid-cooling channel, and the inner cooling channel is an air-cooling channel.

[0010] Since there are both a liquid-cooling channel and an air-cooling channel, the water-cooling plate assembly can cool the battery cell in two cooling ways, thereby improving the cooling effect.

[0011] In some embodiments, the first current collector includes: a first housing; and a first channel portion disposed inside the first housing, one end of which communicates with one end port of the air-cooling channel, and the other end of which communicates with the outside of the first housing, wherein the inner surface of the first housing and the outer surface of the first channel portion jointly define a first current-collecting space, and the second current collector includes: a second housing; and a second channel portion disposed inside the second housing, one end of which communicates with the other end port of the air-cooling channel, and the other end of which communicates with the outside of the second housing, wherein the inner surface of the second housing and the outer surface of the second channel portion jointly define a second current-collecting space.

[0012] By providing the first housing and the first channel portion, two separate spaces are formed inside the first current collector, namely the first current-collecting space and the space inside the first channel portion. The above two spaces are respectively used to convey the coolant and the cooling air flow to the cooling tube plate, so as to ensure that the two cooling methods can operate independently without interference. Similarly, by providing the second housing and the second channel portion, two separate spaces are formed inside the second current collector, thus ensuring that the two cooling methods can operate independently.

[0013] In some embodiments, one end of the first channel portion communicating with the outside of the first housing forms a first air duct opening on the first housing to allow the cooling air flow to enter and exit the air-cooling channel, and one end of the second channel portion communicating with the outside of the second housing forms a second air duct opening on the second housing to allow the cooling air flow to enter and exit the air-cooling channel.

[0014] By forming the first air duct opening on the first housing, it is convenient for the cooling air flow to enter the first channel portion. Subsequently, an air duct docked with the first air duct opening can be additionally provided outside the cooling plate assembly, which further facilitates the input of the cooling air flow.

[0015] In some embodiments, the first air duct opening is disposed on a side of the first housing away from the harmonica tube plate in the length direction of the harmonica tube plate, and the second air duct opening is disposed on a side of the second housing away from the harmonica tube plate in the length direction of the harmonica tube plate.

[0016] The arrangement of the air duct openings in the above embodiments facilitates the external air supply device to input the cooling air flow from one side in the length direction of the assembled water-cooling system and output the heat-exchanged air flow from the other side in the length direction of the water-cooling system, thereby optimizing the overall structure of the water-cooling system and making the air flow more smooth.

[0017] In some embodiments, a first opening is formed on a side of the first housing facing the harmonica tube plate for clamping the first end of the harmonica tube plate to the inside of the first opening, and a second opening is formed on a side of the second housing facing the harmonica tube plate for clamping the second end of the harmonica tube plate to the inside of the second opening.

[0018] By providing the first opening and the second opening, it is convenient to connect the two ends of the harmonica tube plate to the first current collector and the second current collector respectively.

[0019] In some embodiments, the first liquid inlet and the first liquid outlet are respectively disposed on two sides of the first housing in the thickness direction of the harmonica tube plate; and the second liquid inlet and the second liquid outlet are respectively disposed on two sides of the second housing in the thickness direction of the harmonica tube plate.

[0020] Since the liquid inlets and outlets of the water-cooled plate assembly are both disposed on two sides of the water-cooled plate assembly in the thickness direction of the harmonica tube plate, when assembling multiple water-cooled plate assemblies into a water-cooling system, due to the unique positions of the liquid inlets and outlets of each water-cooled plate assembly, it allows the harmonica tube plates of multiple water-cooled plate assemblies to be assembled parallel to each other and spaced apart. Thus, the battery cell can be placed between two adjacent water-cooled plate assemblies arranged in parallel and spaced apart to achieve cooling of two sides of the battery cell. Such an arrangement can improve the cooling efficiency of the battery cell and at the same time achieve a balanced cooling effect on the upper and lower sides of the battery cell.

[0021] In some embodiments, the projections of the first liquid inlet and the first liquid outlet on a reference plane coincide, where the reference plane is a plane parallel to the sides on both sides in the thickness direction of the harmonica tube plate; and the projections of the second liquid inlet and the second liquid outlet on the reference plane coincide.

[0022] Such an arrangement makes the liquid inlets and outlets of two adjacent water-cooled plate assemblies at the same horizontal height when assembling multiple water-cooled plate assemblies into a water-cooling system, which is convenient for the connection between two adjacent water-cooled plate assemblies.

[0023] In some embodiments, the inner cooling channel is a liquid-cooling channel and the outer cooling channel is an air-cooling channel.

[0024] In some embodiments, the first current collector includes: a first housing within which a first current collection space is formed; and the second current collector includes: a second housing within which a second current collection space is formed.

[0025] By providing the first housing to form the first current collection space, the first current collection space is used to convey the coolant to the cooling tube sheet, thereby ensuring that the liquid cooling and air cooling methods can operate independently without interference.

[0026] In some embodiments, a strengthening structure is provided in the liquid cooling channel.

[0027] Since the liquid coolant cannot be compressed, if the deformation of the liquid cooling channel is too large, it may cause the coolant inside to leak or the corrugated tube sheet to be damaged. Therefore, by providing the above strengthening structure, it can be ensured that the liquid cooling channel is not easily deformed, so that only the non-liquid cooling channel absorbs the expansion of the battery cell.

[0028] In some embodiments, the strengthening structure is a plurality of support ribs.

[0029] The support rib structure further strengthens the structural strength of the liquid cooling channel and prevents the liquid cooling channel from deforming.

[0030] In some embodiments, one of the outer cooling channel and the inner cooling channel is a liquid cooling channel, and the other is filled with a phase change material.

[0031] Filling the non-liquid cooling channel with a phase change material can increase the heat capacity of the entire water-cooled plate assembly, which is used to keep the battery cell warm or absorb heat.

[0032] In some embodiments, one of the outer cooling channel and the inner cooling channel is a liquid cooling channel, and the other is filled with an elastic material.

[0033] Filling the non-liquid cooling channel with an elastic material can enable the corrugated tube sheet to have a rebound function after deformation or increase the support strength.

[0034] An embodiment of the second aspect of the present application provides a water-cooling system, including the above water-cooled plate assembly. Among them, a plurality of water-cooled plate assemblies are arranged side by side at intervals. For any two adjacent water-cooled plate assemblies among the plurality of water-cooled plate assemblies: the first liquid inlet and the second liquid outlet of one water-cooled plate assembly among the two adjacent water-cooled plate assemblies are respectively communicated with the first liquid outlet and the second liquid inlet of the other water-cooled plate assembly to realize the connection between the two adjacent water-cooled plate assemblies.

[0035] The water-cooling system of this embodiment can form a coolant circulation system by connecting a plurality of water-cooled plate assemblies, thereby facilitating the circulation of the coolant therein.

[0036] In some embodiments, the above-mentioned water cooling system further includes: a plurality of connecting pipes, each of the plurality of connecting pipes is used to connect the first liquid inlet and the first liquid outlet of two adjacent water cooling plate assemblies or to connect the second liquid inlet and the second liquid outlet of two adjacent water cooling plate assemblies. The first liquid inlet, the second liquid inlet, the first liquid outlet and the second liquid outlet of each water cooling plate assembly in the water cooling system all form flanges protruding towards the outside of the water cooling plate assembly, and the flanges are inserted into the interior of the corresponding connecting pipes to achieve the connection between the first liquid inlet, the second liquid inlet, the first liquid outlet or the second liquid outlet and the connecting pipes.

[0037] By connecting the liquid inlets and outlets of two adjacent front and rear water cooling plate assemblies through the connecting pipes, the connection strength between the water cooling plate assemblies is improved, and at the same time, a certain gap is ensured between the adjacent water cooling plate assemblies, which is used to accommodate battery cells.

[0038] An embodiment of the third aspect of the present application provides a battery box for accommodating battery cells, including the above-mentioned water cooling plate assembly, and the water cooling plate assembly is attached to the battery cells to cool the battery cells.

[0039] An embodiment of the fourth aspect of the present application provides a battery, which includes battery cells and the battery box of the battery in the above-mentioned embodiment, and the box is used to accommodate the battery cells.

[0040] An embodiment of the fifth aspect of the present application provides a battery, which includes the water cooling system in the above-mentioned embodiment; and a plurality of battery cells, at least some of the plurality of battery cells are arranged in the gap between two adjacent water cooling plate assemblies of the water cooling system, and two opposite sides of each battery cell in at least some of the battery cells respectively abut against the mouthpiece tube plates of the two adjacent water cooling plate assemblies, so that the water cooling system cools two opposite sides of each battery cell.

[0041] For the battery in this embodiment, two adjacent water cooling plate assemblies of the water cooling system can respectively cool two opposite sides of each battery cell, thereby improving the cooling efficiency of the battery cells and achieving a balanced cooling effect on the upper and lower parts of the battery cells at the same time.

[0042] An embodiment of the sixth aspect of the present application provides an electrical device, which includes the battery in the above-mentioned embodiment, and the battery is used to provide electrical energy.

[0043] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the following specifically illustrates the specific implementation manners of the present application. Description of the Drawings

[0044] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments of the present application. Obviously, the following described drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0045] In the drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar components or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed according to the present application and should not be regarded as limiting the scope of the present application.

[0046] Figure 1 Structural schematic diagram of a vehicle for some embodiments of the present application;

[0047] Figure 2 Exploded structural schematic diagram of a battery for some embodiments of the present application;

[0048] Figure 3 Structural schematic diagram of a water-cooled plate assembly for some embodiments of the present application;

[0049] Figure 4 Exploded structural schematic diagram of a water-cooled plate assembly for some embodiments of the present application;

[0050] Figure 5 Structural schematic diagram of a mouthpiece tube plate of a water-cooled plate assembly for some embodiments of the present application;

[0051] Figure 6 Structural schematic diagram of a first current collector of a water-cooled plate assembly for some embodiments of the present application;

[0052] Figure 7 Structural schematic diagram of a first current collector of a water-cooled plate assembly from another perspective for some embodiments of the present application;

[0053] Figure 8 Exploded structural schematic diagram of a water-cooled plate assembly for other embodiments of the present application;

[0054] Figure 9 Structural schematic diagram of a water-cooling system for other embodiments of the present application.

[0055] Explanation of reference numerals:

[0056] Vehicle 1;

[0057] Battery 10, controller 20, motor 30;

[0058] Box 100, first part 110, second part 120, water-cooling system 130;

[0059] Battery cell 200;

[0060] Water-cooled plate assembly 300; first current collector 310, second current collector 320, first liquid inlet 330, first liquid outlet 340; second liquid outlet 360; corrugated tube plate 370;

[0061] Inner cooling channel 371; outer cooling channel 372; strengthening structure 373; reinforcing ribs 373a, 373b, 373c; inner wall 374; plate housing 375;

[0062] First housing 311; first channel portion 312; first air duct opening 313;

[0063] Connecting pipe 400. Specific embodiments

[0064] Hereinafter, embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments and the accompanying drawings are only used to more clearly illustrate the technical solution of the present application, so they are only used as examples and cannot be used to limit the protection scope of the present application. Only some parts related to the technical solution of the present application are schematically shown in the accompanying drawings, and they do not represent the actual structure of the product.

[0065] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0066] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features.

[0067] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0068] In the description of the embodiments of the present application, the term "and / or" is merely a description of the association relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0069] In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two). Similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces).

[0070] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of the present application.

[0071] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0072] Currently, from the perspective of the development of the market situation, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power stations, but also widely used in electric transportation such as electric bicycles, electric motorcycles, and electric vehicles, as well as in multiple fields such as military equipment and aerospace. With the continuous expansion of the application fields of power batteries, the market demand is also continuously increasing.

[0073] The applicant has noticed that during the use of a battery, the battery cells generate heat. If this heat is too high, it will have an adverse effect on the performance and service life of the battery. In the related art, a cooling system can be provided to cool the battery cells in the battery. The above cooling system can include a plurality of water-cooled plates laid on the bottom of the battery box, and the upper surfaces of the plurality of water-cooled plates are in contact with the lower surfaces of the battery cells in the battery. During use, for example, a coolant such as water flows through the above plurality of water-cooled plates, thereby taking away the heat on the battery cells and cooling the battery cells.

[0074] However, the applicant's research has found that in order to achieve a better heat dissipation effect, the water-cooled plates in the related art are in close contact with the surface of the battery cells. The battery cells will expand during use, and these expansions may intensify as the battery usage time increases, resulting in their extrusion of the water-cooled plates and receiving a reaction force from the water-cooled plates. The water-cooled plates in the related art do not have the function of absorbing the expanded volume of the battery cells. Therefore, when the battery cells expand excessively, the extrusion force of the water-cooled plates on the battery cells may damage the structure of the battery cells.

[0075] Based on the above considerations, in order to solve the problem of battery cell expansion, the applicant has conducted in-depth research and designed a water-cooled plate assembly. The corrugated tube plate of this water-cooled plate assembly includes two layers of cooling channels, an inner layer and an outer layer. One of the cooling channels (the inner cooling channel or the outer cooling channel) is a non-liquid-cooled cooling channel, so it can be compressed and deformed. When the battery cells expand, this non-liquid-cooled cooling channel can be used to absorb the expansion of the battery cells, thereby reducing the extrusion force of the water-cooled plates on the battery cells and avoiding damage to the battery cells.

[0076] The battery cells disclosed in the embodiments of the present application can be used but are not limited to power-consuming devices such as vehicles, ships, or aircraft. A power supply system of the power-consuming device can be composed of the water-cooled plate assembly, the water-cooling system, the battery, etc. disclosed in the present application. In this way, it is beneficial to relieve the expansion of the battery cells and improve the stability of the battery performance and the battery life.

[0077] The embodiments of the present application provide a power-consuming device using a battery as a power source. The power-consuming device can be but is not limited to mobile phones, tablets, laptop computers, electric toys, electric tools, battery cars, electric vehicles, ships, spacecraft, etc. Among them, the electric toys can include fixed or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys, and electric aircraft toys, etc. The spacecraft can include airplanes, rockets, space shuttles, and spaceships, etc.

[0078] For the convenience of description in the following embodiments, a power-consuming device of an embodiment of the present application is taken as an example of a vehicle 1 for description.

[0079] Please refer to Figure 1 , Figure 1Schematic structural diagram of vehicle 1 provided by some embodiments of the present application. Vehicle 1 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, an extended-range vehicle, etc. A battery 10 is disposed inside vehicle 1. The battery 10 can be disposed at the bottom, head, or tail of vehicle 1. The battery 10 can be used to supply power to vehicle 1. For example, the battery 10 can serve as the operating power source of vehicle 1. Vehicle 1 can also include a controller 20 and a motor 30. The controller 20 is used to control the battery 10 to supply power to the motor 30. For example, it is used for the working power requirements during the start-up, navigation, and driving of vehicle 1.

[0080] In some embodiments of the present application, the battery 10 can not only serve as the operating power source of vehicle 1, but also serve as the driving power source of vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for vehicle 1.

[0081] Please refer to Figure 2 , Figure 2 Explosion diagram of the battery 10 provided by some embodiments of the present application. The battery 10 includes a box body 100 and battery cells 200. The battery cells 200 are accommodated in the box body 100. Among them, the box body 100 is used to provide an accommodation space for the battery cells 200, and the box body 100 can adopt various structures. In some embodiments, the box body 100 can include a first part 110 and a second part 120. The first part 110 and the second part 120 are covered with each other, and the first part 110 and the second part 120 jointly define an accommodation space for accommodating the battery cells 200. The second part 120 can be a hollow structure with one end open, and the first part 110 can be a plate-like structure. The first part 110 covers the open side of the second part 120 so that the first part 110 and the second part 120 jointly define the accommodation space; the first part 110 and the second part 120 can also both be hollow structures with one side open, and the open side of the first part 110 covers the open side of the second part 120. Of course, the box body 100 formed by the first part 110 and the second part 120 can be of various shapes, such as a cylinder, a cuboid, etc.

[0082] In the battery 10, there can be multiple battery cells 200. The multiple battery cells 200 can be connected in series, in parallel, or in a series-parallel combination. A series-parallel combination means that there are both series and parallel connections among the multiple battery cells 200. The multiple battery cells 200 can be directly connected in series, in parallel, or in a series-parallel combination together, and then the whole formed by the multiple battery cells 200 is accommodated in the box body 100; of course, the battery 10 can also be that multiple battery cells 200 are first connected in series, in parallel, or in a series-parallel combination to form a battery module form, and then multiple battery modules are connected in series, in parallel, or in a series-parallel combination to form a whole and are accommodated in the box body 100. The battery 10 can also include other structures. For example, the battery 10 can also include a busbar component for realizing the electrical connection among the multiple battery cells 200.

[0083] Among them, each battery cell 200 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 200 can be in a cylindrical shape, a flat shape, a cuboid shape, or other shapes, etc.

[0084] This application first provides a water-cooling plate assembly 300. As Figure 3 , Figure 4 shown, Figure 3 is a schematic structural diagram of the water-cooling plate assembly 300 according to some embodiments of this application, Figure 4 is an exploded structural diagram of the water-cooling plate assembly 300 according to some embodiments of this application. The water-cooling plate assembly 300 includes: a corrugated tube plate 370, a first current collector 310, and a second current collector 320. As Figure 4 shown, an outer cooling channel 372 and an inner cooling channel 371 located inside the outer cooling channel 372 are formed inside the corrugated tube plate 370. Both the outer cooling channel 372 and the inner cooling channel 371 extend along the length direction of the corrugated tube plate 370 (i.e., extend along the Figure 4 X direction shown). One of the outer cooling channel 372 and the inner cooling channel 371 is a liquid-cooling channel. The first current collector 310 is disposed at a first end in the length direction of the corrugated tube plate 370 and forms a first current-collecting space communicating with one end port of the liquid-cooling channel. The first current collector 310 also forms a first liquid inlet 330 and a first liquid outlet 340 for the coolant to flow into and out of the first current-collecting space. The second current collector 320 is disposed at a second end opposite to the first end in the length direction of the corrugated tube plate 370 and forms a second current-collecting space communicating with the other end port of the liquid-cooling channel. The second current collector 320 also forms a second liquid inlet (not shown due to occlusion) and a second liquid outlet 360 for the coolant to flow into and out of the second current-collecting space.

[0085] As Figure 4 shown, the corrugated tube plate 370 has a length direction (as shown by the X-axis direction in Figure 4 ), a width direction (as shown by the Y-axis direction in Figure 4 ), and a thickness direction (as shown by the Z-axis direction in Figure 4 ). Inner and outer two-layer cooling channels are formed inside the corrugated tube plate 370. The above two-layer cooling channels both extend along the X direction in the figure. Figure 5 is a schematic structural diagram of the corrugated tube plate 370 of the water-cooling plate assembly 300 according to some embodiments of this application. As Figure 5As shown, the harmonica tube plate 370 includes: a plate housing 375 and a rectangular inner wall 374. The outer cooling channel 372 is jointly defined by the plate housing 375 and the rectangular inner wall 374 provided inside the harmonica tube plate 370, and the inner cooling channel 371 is defined by the rectangular inner wall 374. Therefore, the cross-section of the outer cooling channel 372 is annular and surrounds the inner cooling channel 371. Both of the two cooling channels have two ports, which respectively face the first current collector 310 and the second current collector 320. One of the two cooling channels is a liquid-cooling channel, and the coolant will flow into the liquid-cooling channel to cool the battery cell 200. The other of the two cooling channels is a non-liquid-cooling channel, and the coolant will not flow into this non-liquid-cooling channel. In some embodiments, the outer cooling channel 372 can be a liquid-cooling channel and the inner layer is a non-liquid-cooling channel. In some other embodiments, the inner cooling channel 371 can be a liquid-cooling channel and the outer layer is a non-liquid-cooling channel.

[0086] The first current collector 310 and the second current collector 320 are respectively arranged at the first end and the second end in the length direction of the harmonica tube plate 370. The first current collector 310 includes a first housing 311. The first housing 311 has a first current collection space inside. The side of the first housing 311 facing the harmonica tube plate 370 is open for connecting the first end of the harmonica tube plate 370. One end port of the liquid-cooling channel of the harmonica tube plate 370 communicates with the first current collection space. The second current collector 320 includes a second housing. The second housing has a second current collection space inside. The side of the second housing facing the harmonica tube plate 370 is open for connecting the second end of the harmonica tube plate 370. The other end port of the liquid-cooling channel of the harmonica tube plate 370 communicates with the second current collection space. In some embodiments, the first current collector 310 and the second current collector 320 have the same size and shape and are symmetrically arranged left and right at both ends in the length direction of the harmonica tube plate 370.

[0087] The harmonica tube plate 370 of the water-cooled plate assembly 300 has two inner and outer cooling channels, and one of them can be a non-liquid-cooling channel. Since the non-liquid-cooling channel is not filled with coolant inside, the channel wall can be appropriately deformed towards the internal space of the channel, so that the two sides in the thickness direction of the harmonica tube plate 370 can absorb the expansion of the battery cell 200 and prevent the battery cell 200 from being damaged by extrusion.

[0088] According to some embodiments of the present application, the outer cooling channel 372 is a liquid-cooling channel, and the inner cooling channel 371 is an air-cooling channel.

[0089] The inner and outer cooling channels of the harmonica tube plate 370 can be liquid-cooling channels and air-cooling channels respectively. Subsequently, cooling air can be input into the air-cooling channel to air-cool the battery cell 200. The air-cooling channel itself is compressible, so the cross-section of the channel can be appropriately deformed to enable the harmonica tube plate 370 to absorb the expansion of the battery cell 200.

[0090] Since there are both liquid-cooling channels and air-cooling channels, the water-cooling plate assembly 300 can cool the battery cell 200 in two cooling ways, thereby improving the cooling effect.

[0091] According to some embodiments of the present application, as Figure 6 and Figure 7 shown, Figure 6 FIG. is a schematic structural view of the first current collector 310 of the water-cooling plate assembly 300 according to some embodiments of the present application; Figure 7 FIG. is a schematic structural view of the first current collector 310 of the water-cooling plate assembly 300 according to some embodiments of the present application from another perspective. The first current collector 310 includes: a first outer shell 311 and a first channel portion 312. The first channel portion 312 is disposed inside the first outer shell 311, one end of which communicates with one end port of the air-cooling channel, and the other end of which communicates with the outside of the first outer shell 311. The inner surface of the first outer shell 311 and the outer surface of the first channel portion 312 jointly define a first current collection space. The second current collector 320 includes: a second outer shell and a second channel portion. The second channel portion is disposed inside the second outer shell, one end of which communicates with the other end port of the air-cooling channel, and the other end of which communicates with the outside of the second outer shell. The inner surface of the second outer shell and the outer surface of the second channel portion jointly define a second current collection space.

[0092] In this embodiment, the first housing 311 may be in a cuboid structure with a hollow interior. The side of the first housing 311 facing the harmonica tube plate 370 is open. The first channel portion 312 is disposed within the hollow portion of the first housing 311. The first channel portion 312 is approximately tubular and has two ports, which are respectively connected to one end port of the air-cooling channel facing the first current collector 310 and the outside of the first housing 311, so that the cooling air flow outside the first housing 311 can be introduced into the air-cooling channel or the cooling air flow can be discharged from the air-cooling channel. The cross-section of the first channel portion 312 is rectangular and is approximately the same as the cross-section of the air-cooling channel for facilitating the connection therebetween. The port of the first channel portion 312 can be welded to the port of the air-cooling channel, or complementary clamping features can be provided at the ports of the first channel portion 312 and the air-cooling channel (for example, a flange is provided on the inner side of the port of the first channel portion 312 and a recess is provided on the outer side of the port of the air-cooling channel) to ensure the clamping fit between the first channel portion 312 and the air-cooling channel. The first current-collecting space is the space defined between the inner surface of the first housing 311 and the outer surface of the first channel portion 312, and this space is only connected to the liquid-cooling channel on the outer layer of the harmonica tube plate 370 and is used to input the coolant into the liquid-cooling channel or output the coolant from the liquid-cooling channel. Although in this embodiment, both the first housing 311 and the first channel portion 312 are shown as cuboid structures, in some other embodiments, the first housing 311 and the first channel portion 312 may also be other shapes such as a cylinder, as long as the first current-collecting space is connected to the outer-layer liquid-cooling channel and the first channel portion 312 is connected to the inner-layer air-cooling channel.

[0093] The specific settings of the second housing and the second channel portion are similar to the settings of the first housing 311 and the first channel portion 312, and will not be elaborated here. The second current collector 320 may be arranged in a completely symmetrical manner with the first current collector 310.

[0094] By providing the first housing 311 and the first channel portion 312, two separate spaces are formed inside the first current collector 310, namely the first current-collecting space and the space inside the first channel portion 312. The above two spaces are respectively used to convey the coolant and the air flow to the cooling tube plate, so as to ensure that the two cooling methods can operate independently without interference. Similarly, by providing the second housing and the second channel portion, two separate spaces are formed inside the second current collector 320, thus ensuring that the two cooling methods can operate independently.

[0095] Such as Figure 7As shown, according to some embodiments of the present application, one end of the first channel portion 312 communicating with the outside of the first housing 311 forms a first air duct opening 313 on the first housing 311 to allow cooling air flow to enter and exit the air-cooled cooling channel. One end of the second channel portion communicating with the outside of the second housing forms a second air duct opening on the second housing to allow cooling air flow to enter and exit the air-cooled cooling channel.

[0096] The first channel portion 312 can be integrally formed with the first housing 311. For example, the first channel portion 312 can be formed by stamping the first housing 311. The connection portion of the first channel portion 312 on the first housing 311 forms the first air duct opening 313, and the external cooling air flow can enter the first channel portion 312 through the first air duct opening 313.

[0097] The specific structures of the second housing and the second channel portion are similar to those of the first housing 311 and the first channel portion 312, and will not be described in detail here. The second current collector 320 can be arranged in a completely symmetrical manner with the first current collector 310.

[0098] By forming the first air duct opening 313 on the first housing 311, it is convenient for the cooling air flow to enter the first channel portion 312. Subsequently, an air duct docked with the first air duct opening 313 can be additionally arranged outside the cooling plate assembly to further input the cooling air flow.

[0099] The first air duct opening 313 is arranged on the side of the first housing 311 away from the harmonica tube plate 370 in the length direction of the harmonica tube plate 370. The second air duct opening is arranged on the side of the second housing away from the harmonica tube plate 370 in the length direction of the harmonica tube plate 370.

[0100] As described above, the first housing 311 is a cuboid, and the first air duct opening 313 is formed on the side of the cuboid away from the harmonica tube plate 370. When multiple water-cooled plate assemblies 300 are subsequently assembled into a water-cooling system 130, multiple first air duct openings 313 are arranged on one side in the length direction of the assembled water-cooling system 130. The external air supply device for generating the cooling air flow can blow air towards this side of the water-cooling system 130 to respectively deliver the cooling air flow into each water-cooled plate assembly 300. Similarly, multiple second air duct openings will be arranged on the other side in the length direction of the assembled water-cooling system 130. The air flow after heat exchange with the battery cell will be discharged from this side of the water-cooling system 130.

[0101] The setting method of the air duct opening in the above embodiment facilitates the external air supply device to input the cooling air flow from one side in the length direction of the assembled water-cooling system 130 and output the heat-exchanged air flow from the other side in the length direction of the water-cooling system 130, thereby optimizing the overall structure of the water-cooling system 130 and making the air flow more smooth.

[0102] On one side of the first outer shell 311 facing the harmonica tube plate 370, a first opening is formed for clamping the first end of the harmonica tube plate 370 to the inside of the first opening. On one side of the second outer shell facing the harmonica tube plate 370, a second opening is formed for clamping the second end of the harmonica tube plate 370 to the inside of the second opening.

[0103] The cross-section of the first outer shell 311 can be slightly larger than that of the harmonica tube plate 370, which is beneficial for clamping the first outer shell 311 to one end of the harmonica tube plate 370. The first opening matches the cross-section of the plate outer shell 375 of the harmonica tube plate 370. As Figure 5 shown, the cross-section of the plate outer shell 375 can be a flat rectangular shape with semi-circular ends at both ends. Then the first opening can also be of the above shape to match and clamp with the harmonica tube plate 370. The inner edge of the first opening can be provided with clamping features (such as clamping flanges) to strengthen the connection with the harmonica tube plate 370. The shape of the second opening is similar to that of the first opening and will not be elaborated here. Although in this embodiment, the two ends of the harmonica tube plate 370 are respectively clamped and connected to the first current collector 310 and the second current collector 320, in some other embodiments, the harmonica tube plate 370 can also be connected to the first current collector 310 and the second current collector 320 respectively by other means such as welding.

[0104] By providing the first opening and the second opening, it is convenient for the two ends of the harmonica tube plate 370 to be respectively connected to the first current collector 310 and the second current collector 320.

[0105] The first liquid inlet 330 and the first liquid outlet 340 are respectively arranged on both sides of the first outer shell 311 in the thickness direction of the harmonica tube plate 370. The second liquid inlet and the second liquid outlet 360 are respectively arranged on both sides of the second outer shell in the thickness direction of the harmonica tube plate 370.

[0106] As described above, both the first outer shell 311 and the second shell are in the shape of a cuboid. The first liquid inlet 330 and the first liquid outlet 340 are respectively arranged on the front and rear two side surfaces of the first outer shell 311, and the second liquid inlet and the second liquid outlet 360 are respectively arranged on the front and rear two side surfaces of the second shell.

[0107] Since both the liquid inlet and the liquid outlet of the water-cooling plate assembly 300 are provided on both sides of the thickness direction of the comb-tube plate 370 of the water-cooling plate assembly 300, when assembling a plurality of water-cooling plate assemblies 300 into the water-cooling system 130, due to the unique positions of the liquid inlet and the liquid outlet of each water-cooling plate assembly 300, it is allowed to assemble the comb-tube plates 370 of the plurality of water-cooling plate assemblies 300 parallel to each other and at intervals. Thereby enabling the battery cell 200 to be placed between two adjacent water-cooling plate assemblies 300 arranged in parallel at intervals, realizing the cooling of two sides of the battery cell 200. Such a setting can improve the cooling efficiency of the battery cell 200 and at the same time achieve a balanced cooling effect on the upper and lower parts of the battery cell 200.

[0108] In some embodiments, the projections of the first liquid inlet 330 and the first liquid outlet 340 on the reference plane coincide, where the reference plane is a plane parallel to the sides on both sides of the thickness direction of the comb-tube plate 370. The projections of the second liquid inlet and the second liquid outlet 360 on the reference plane coincide.

[0109] Further as Figure 6 and Figure 7 shown, the coincidence of the projections of the first liquid inlet 330 and the first liquid outlet 340 on the reference plane means that the first liquid inlet 330 and the first liquid outlet 340 are arranged at the same height of the first current collector 310; the coincidence of the projections of the second liquid inlet and the second liquid outlet 360 on the reference plane means that the second liquid inlet and the second liquid outlet 360 are arranged at the same height of the second current collector 320. In some embodiments, the first liquid inlet 330, the first liquid outlet 340, the second liquid inlet, and the second liquid outlet 360 can all be arranged at the middle position in the height direction of the first current collector 310 or the second current collector 320.

[0110] Such a setting enables that when assembling a plurality of water-cooling plate assemblies 300 into the water-cooling system 130, the liquid inlets and the liquid outlets of two adjacent water-cooling plate assemblies 300 are at the same horizontal height, facilitating the connection between two adjacent water-cooling plate assemblies 300.

[0111] Figure 8 is an exploded structural schematic diagram of the water-cooling plate assembly 300 according to other embodiments of the present application. In some embodiments, as Figure 8 shown, the inner cooling channel 371 is a liquid-cooling channel, and the outer cooling channel 372 is an air-cooling channel.

[0112] Contrary to Figure 4 the embodiment, Figure 8 in the embodiment shown, the inner cooling channel 371 is a liquid-cooling channel, and the outer cooling channel 372 is an air-cooling channel. The gas in the outer air-cooling channel is compressible, so it can be appropriately deformed to enable the comb-tube plate 370 to absorb the expansion of the battery cell.

[0113] In Figure 8 the illustrated embodiment, the first current collector 310 includes: a first housing, within which a first current collection space is formed. The second current collector 320 includes: a second housing, within which a second current collection space is formed.

[0114] As Figure 8 illustrated, for the case where the inner cooling channel 371 is a liquid-cooling channel, the sizes of the first housing and the second housing of the first current collector 310 and the second current collector 320 can be set relatively small so that the housing only docks with the ports of the inner cooling channel 371. Additionally, different from the Figure 4 illustrated embodiment, the first current collector 310 and the second current collector 320 may not have the first channel portion 312 and the second channel portion. Thus, the outer air-cooling channels are directly exposed so that an external air supply device can directly supply air toward the ports of the air-cooling channels.

[0115] By providing the first housing to form the first current collection space, the first current collection space is used to deliver the coolant to the harmonica tube sheet 370, thereby ensuring that the two cooling methods of liquid cooling and air cooling can operate independently without interference.

[0116] In some embodiments, a strengthening structure 373 is provided in the liquid-cooling channel.

[0117] As Figure 4 、 Figure 5 and Figure 8 illustrated, the above-mentioned strengthening structure 373 is only provided in the liquid-cooling channel to ensure that the structure of the liquid-cooling channel is strong and not easily deformed. However, there is no strengthening structure 373 in the non-liquid-cooling channels so that when the battery cell 200 expands, it can contract and deform inward to absorb the expansion of the battery cell 200.

[0118] Since the liquid coolant cannot be compressed, if the deformation of the liquid-cooling channel is too large, it may cause the coolant inside to leak or cause damage to the harmonica tube sheet 370. Therefore, by providing the above-mentioned strengthening structure 373, it can be ensured that the liquid-cooling channel is not easily deformed, so that only the non-liquid-cooling channels absorb the expansion of the battery cell 200.

[0119] In some embodiments, the strengthening structure 373 is a plurality of support ribs.

[0120] As Figure 4 、 Figure 5 and Figure 8 illustrated, the above-mentioned plurality of support ribs are provided in the liquid-cooling channel. As Figure 5As shown, if the outer cooling channel 372 is a liquid-cooling channel, then each of the plurality of support ribs supports between the inner side surfaces of the plate housing 375 or between the plate housing 375 and the inner wall 374. As Figure 5 shown, the support rib 373a supports between the plate housing 375 and the inner wall 374, and the support rib 373b supports between two opposite inner side surfaces of the plate housing 375, depending on the position of the support rib. In some embodiments, the support ribs may also extend along the length direction of the corrugated tube plate 370 and divide the outer cooling channel 372 into a plurality of sub-cooling channels. If the inner cooling channel 371 is a liquid-cooling channel, then each of the plurality of support ribs supports between the inner side surfaces of the inner wall 374. As Figure 8 shown, the support rib 373c supports between two opposite inner side surfaces of the inner wall 374. In some embodiments, the support ribs may also extend along the length direction of the corrugated tube plate 370 and divide the inner cooling channel 371 into a plurality of sub-cooling channels.

[0121] The support rib structure further strengthens the structural strength of the liquid-cooling channel and prevents the liquid-cooling channel from deforming.

[0122] In some embodiments, one of the outer cooling channel 372 and the inner cooling channel 371 is a liquid-cooling channel, and the other is filled with a phase change material. In some other embodiments, one of the outer cooling channel 372 and the inner cooling channel 371 is a liquid-cooling channel, and the other is filled with an elastic material.

[0123] In addition to being used as an air-cooling channel as described in the above embodiments, the non-liquid-cooling channel can also be used only as a space for absorbing the expansion of the battery cell 200. In this case, some other substances can be filled in the non-liquid-cooling channel to achieve other functions. For example, a phase change material such as an inorganic salt solution or an organic solution can be filled in the non-liquid-cooling channel for heat preservation or heat dissipation of the battery cell 200. The above-mentioned phase change material only fills a part of the volume of the non-liquid-cooling channel to ensure that the cooling channel has extra space for deformation. For another example, an elastic material such as sponge can also be filled in the non-liquid-cooling channel to ensure that the non-liquid-cooling channel can return to its original state after deformation.

[0124] Filling the phase change material in the non-liquid-cooling channel can increase the heat capacity of the entire water-cooled plate assembly 300 for heat preservation or heat absorption of the battery cell 200. Filling the elastic material in the non-liquid-cooling channel can enable the corrugated tube plate 370 to have a resilience function after deformation or increase the support strength.

[0125] This application also provides a water-cooling system 130, returning to Figure 2, the water cooling system 130 includes the above-mentioned plurality of water cooling plate assemblies 300. The plurality of water cooling plate assemblies 300 are arranged side by side at intervals. For any two adjacent water cooling plate assemblies 300 among the plurality of water cooling plate assemblies 300, the first liquid inlet 330 and the second liquid outlet 360 of one water cooling plate assembly 300 among the two adjacent water cooling plate assemblies 300 are respectively communicated with the first liquid outlet 340 and the second liquid inlet of the other water cooling plate assembly 300 to realize the connection between two adjacent water cooling plate assemblies 300.

[0126] The water cooling system 130 includes a plurality of water cooling plate assemblies 300. For example, as Figure 2 shown, it includes 3 water cooling plate assemblies 300. However, in some other embodiments, the water cooling system 130 may further include more than 3 or less than 3 water cooling plate assemblies 300. The first liquid inlet 330 of the water cooling plate assembly 300 in the first row ( Figure 2 the foremost water cooling plate assembly 300 shown) constitutes the total liquid inlet of the entire water cooling system 130, and its second liquid outlet 360 constitutes the total liquid outlet of the entire water cooling system 130. For any water cooling plate assembly 300 among the middle multiple rows of water cooling plate assemblies 300, its first liquid inlet 330 is connected to the first liquid outlet 340 of the previous water cooling plate assembly 300, its first liquid outlet 340 is connected to the first liquid inlet 330 of the next water cooling plate assembly 300, its second liquid inlet is connected to the second liquid outlet 360 of the next water cooling plate assembly 300, and its second liquid outlet 360 is connected to the second liquid inlet of the previous water cooling plate assembly 300. The first liquid outlet 340 and the second liquid inlet of the water cooling plate assembly 300 in the last row are closed. Such a setting enables the water cooling system 130 to form a coolant circulation system. The coolant will enter from the first liquid inlet 330 of the water cooling plate assembly 300 in the first row of the water cooling system 130 and then reach the first manifold space of the multiple rows of water cooling plate assemblies 300. For each water cooling plate assembly 300, the coolant flows from its first manifold space through the cooling channels of the harmonica tube plate 370 to the second manifold space. Finally, the coolant converges in the second manifold space of the multiple rows of water cooling plate assemblies 300 and finally flows out from the second liquid outlet 360 of the water cooling plate assembly 300 in the first row. The outflowing coolant can be cooled by a cooling device outside the battery and then input again into the first liquid inlet 330 of the water cooling plate assembly 300 in the first row. In addition, as described above, a blowing device can also be provided on one side in the length direction of the water cooling system 130, and the blowing device blows air to the first air duct opening 313 or the second air duct opening of the multiple water cooling plate assemblies 300 to realize air cooling of the battery cells 200.

[0127] In addition to the water-cooling system 130 described in the above embodiments, in some other embodiments, the air-cooling channels in multiple water-cooling plate assemblies 300 can be connected in series to form an internally circulating channel. A blowing device (e.g., a fan) can be arranged in the above internally circulating channel, so that the airflow in the air-cooling channels can circulate internally in the water-cooling system 130.

[0128] In some embodiments, the above air-cooling channels can also be internally connected to the battery 10 in which the water-cooling system 130 is installed. When coolant is introduced into the water-cooling system 130, the airflow in the air-cooling channels can transfer the cold quantity of the air duct wall surface to the air in the battery 10, achieving the effect of enhancing heat transfer. The above arrangement can also reduce the temperature difference at each position in the battery 10, and at the same time can also cool other components that are not in contact with the water-cooling system 130, such as high-voltage boxes, copper bars, etc.

[0129] The water-cooling system 130 of this embodiment can form a coolant circulation system by connecting multiple water-cooling plate assemblies 300, thus facilitating the circulation of coolant therein.

[0130] In some embodiments, as Figure 2 and Figure 4 shown, the water-cooling system 130 further includes a plurality of connecting pipes 400. Each connecting pipe 400 in the plurality of connecting pipes 400 is used to connect the first liquid inlet 330 and the first liquid outlet 340 of two adjacent water-cooling plate assemblies 300 or to connect the second liquid inlet and the second liquid outlet 360 of two adjacent water-cooling plate assemblies 300. The first liquid inlet 330, the second liquid inlet, the first liquid outlet 340, and the second liquid outlet 360 of each water-cooling plate assembly 300 of the water-cooling system 130 all form flanges extending outwardly from the outside of the water-cooling plate assembly 300, and the flanges are inserted into the interior of the corresponding connecting pipe 400 to achieve the connection between the first liquid inlet 330, the second liquid inlet, the first liquid outlet 340, or the second liquid outlet 360 and the connecting pipe 400.

[0131] By connecting the liquid inlets and outlets of two adjacent front and rear water-cooling plate assemblies 300 through the connecting pipe 400, the connection strength between the water-cooling plate assemblies 300 is improved, and at the same time, a certain gap is ensured between the adjacent water-cooling plate assemblies 300 for accommodating the battery cells 200.

[0132] According to another aspect of the present application, a battery box 100 is further provided. The box 100 is used to accommodate the battery cells 200. As Figure 2As shown, in addition to the first part 110 and the second part 120, the above-mentioned box body 100 further includes the above-mentioned water cooling system 130. The water cooling plate assembly 300 in the water cooling system 130 abuts against the battery cell 200 to cool the battery cell 200. In some embodiments, the water cooling plate assembly 300 can be set as a part of the box body 100 and fixed inside the box body 100.

[0133] According to one aspect of the present application, there is also provided a battery 10, which includes: a battery cell 200 and the above-mentioned box body 100. The box body 100 is used to accommodate the battery cell 200.

[0134] According to one aspect of the present application, there is also provided a battery 10, which includes: the above-mentioned water cooling system 130 and a plurality of battery cells 200. At least some of the plurality of battery cells 200 are arranged in the gap between two adjacent water cooling plate assemblies 300 of the water cooling system 130. Two opposite sides of each battery cell 200 among at least some of the battery cells 200 respectively abut against the harmonica tube plates 370 of two adjacent water cooling plate assemblies 300, so that the water cooling system 130 cools two opposite sides of each battery cell 200.

[0135] For the battery of this embodiment, two adjacent water cooling plate assemblies 300 of the water cooling system 130 can respectively cool two opposite sides of each battery cell 200, thereby improving the cooling efficiency of the battery cell 200 and achieving a balanced cooling effect on the upper and lower parts of the battery cell 200.

[0136] According to one aspect of the present application, there is also provided an electrical device 1, and the battery 10 is used to provide kinetic energy for the electrical device 1. The specific structure of the electrical device 1 can refer to the description of Figure 1 and will not be elaborated here.

[0137] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered by the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A water-cooled plate assembly, comprising: A corrugated tube plate, inside which an outer cooling channel and an inner cooling channel located inside the outer cooling channel are formed. Both the outer cooling channel and the inner cooling channel extend along the length direction of the corrugated tube plate. Among them, one of the outer cooling channel and the inner cooling channel is a liquid-cooling channel; A first current collector, arranged at the first end in the length direction of the corrugated tube plate and forming a first current-collecting space communicated with one end port of the liquid-cooling channel. The first current collector also forms a first liquid inlet and a first liquid outlet for the coolant to flow into and out of the first current-collecting space; and A second current collector, arranged at the second end opposite to the first end in the length direction of the corrugated tube plate and forming a second current-collecting space communicated with the other end port of the liquid-cooling channel. The second current collector also forms a second liquid inlet and a second liquid outlet for the coolant to flow into and out of the second current-collecting space.

2. The water-cooling plate assembly according to claim 1, wherein, The outer cooling channel is a liquid-cooling channel, and the inner cooling channel is an air-cooling channel.

3. The water-cooling plate assembly according to claim 2, wherein, The first current collector includes: A first housing; and A first channel part, arranged inside the first housing, one end of which is communicated with one end port of the air-cooling channel, and the other end of which is communicated with the outside of the first housing. Among them The inner surface of the first housing and the outer surface of the first channel part jointly define the first current-collecting space, and The second current collector includes: A second housing; and A second channel part, arranged inside the second housing, one end of which is communicated with the other end port of the air-cooling channel, and the other end of which is communicated with the outside of the second housing. Among them The inner surface of the second housing and the outer surface of the second channel part jointly define the second current-collecting space.

4. The water-cooled plate assembly according to claim 3, wherein, One end of the first channel part communicated with the outside of the first housing forms a first air duct opening on the first housing to allow cooling air flow to enter and exit the air-cooling channel, and One end of the second channel part communicated with the outside of the second housing forms a second air duct opening on the second housing to allow cooling air flow to enter and exit the air-cooling channel.

5. The water-cooled plate assembly according to claim 4, wherein, The first air duct opening is arranged on the side of the first housing away from the corrugated tube plate in the length direction of the corrugated tube plate, and The second air duct opening is arranged on the side of the second housing away from the corrugated tube plate in the length direction of the corrugated tube plate.

6. The water-cooled plate assembly according to claim 3, wherein, One side of the first housing facing the corrugated tube plate forms a first opening for clamping the first end of the corrugated tube plate inside the first opening, and One side of the second housing facing the corrugated tube plate forms a second opening for clamping the second end of the corrugated tube plate inside the second opening.

7. The water-cooled plate assembly according to claim 3, wherein, The first liquid inlet and the first liquid outlet are respectively arranged on two sides of the first housing in the thickness direction of the harmonica tube plate; and The second liquid inlet and the second liquid outlet are respectively arranged on two sides of the second housing in the thickness direction of the harmonica tube plate.

8. The water-cooled plate assembly according to claim 7, wherein The projections of the first liquid inlet and the first liquid outlet on a reference plane coincide, wherein the reference plane is a plane parallel to the side surfaces on two sides of the thickness direction of the harmonica tube plate; and The projections of the second liquid inlet and the second liquid outlet on the reference plane coincide.

9. The water-cooling plate assembly according to claim 1, wherein, The inner cooling channel is a liquid-cooled channel, and the outer cooling channel is an air-cooled channel.

10. The water-cooling plate assembly according to claim 9, wherein, The first current collector includes: A first housing, inside which the first current collection space is formed; and The second current collector includes: A second housing, inside which the second current collection space is formed.

11. The water-cooled plate assembly according to any one of claims 1-10, wherein A strengthening structure is arranged in the liquid-cooled channel.

12. The water-cooled plate assembly according to claim 11, wherein The strengthening structure is a plurality of support ribs.

13. The water-cooled plate assembly according to any one of claims 1-10, wherein One of the outer cooling channel and the inner cooling channel is a liquid-cooled channel, and the other is filled with a phase change material.

14. The water-cooled plate assembly according to any one of claims 1-10, wherein One of the outer cooling channel and the inner cooling channel is a liquid-cooled channel, and the other is filled with an elastic material.

15. A water cooling system, comprising a plurality of water cooling plate assemblies as described in any one of claims 1-14, wherein, A plurality of water-cooled plate assemblies are arranged side by side at intervals. For any two adjacent water-cooled plate assemblies among the plurality of water-cooled plate assemblies: The first liquid inlet and the second liquid outlet of one water-cooled plate assembly among the two adjacent water-cooled plate assemblies are respectively communicated with the first liquid outlet and the second liquid inlet of the other water-cooled plate assembly to realize the connection between the two adjacent water-cooled plate assemblies.

16. The water cooling system according to claim 15, wherein, It further includes: A plurality of connecting pipes, and each connecting pipe among the plurality of connecting pipes is used to communicate the first liquid inlet and the first liquid outlet of two adjacent water-cooled plate assemblies or is used to communicate the second liquid inlet and the second liquid outlet of two adjacent water-cooled plate assemblies.

17. A battery box body, which is used to accommodate battery cells and includes any one of the water-cooled plate assemblies according to claims 1-14, and the water-cooled plate assembly abuts against the battery cells to cool the battery cells.

18. A battery, including: Battery cells; The battery box body according to claim 17, which is used to accommodate the battery cells.

19. A battery, including: The water-cooling system according to claim 15 or 16; And A plurality of battery cells, at least some of the battery cells among the plurality of battery cells are arranged in the gap between two adjacent water-cooled plate assemblies of the water-cooling system, wherein Two opposite side surfaces of each battery cell among the at least some battery cells respectively abut against the harmonica tube plates of the two adjacent water-cooled plate assemblies, so that the water-cooling system cools the two opposite side surfaces of each battery cell.

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