Water cooling plate assembly, water cooling system, battery and box body thereof, and power consumption device

Abstract

To provide a water cooling plate assembly to improve cooling effect for a battery cell, a water cooling system, a battery, and a box body thereof, and a power consumption device.SOLUTION: A water cooling plate assembly 300 includes a harmonica- shaped tube 370, a first current collector 310, and a second current collector 320. The first current collector is arranged at a first end of the harmonica-shaped tube plate in the length direction and is formed with a first current collecting space which communicates with ports at one end of each of a plurality of cooling channels. A first liquid inlet 330 and a first liquid outlet 340 for a cooling liquid to flow into and out of the first current collecting space are formed on both sides of the harmonica-shaped tube plate in the thickness direction, respectively. The second current collector is arranged at a second end opposite to the first end of the harmonica-shaped tube plate in the length direction and is formed with a second current collecting space which communicates with ports at the other end of each of the plurality of cooling channels. A second liquid inlet and a second liquid outlet 360 for the cooling liquid to flow into and out of the second current collecting space are formed on both sides of the harmonica-shaped tube plate in the thickness direction.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] [Cross-Citation of Related Applications] This application claims priority to Chinese Patent Application No. 202210328685.7, filed on March 30, 2022, entitled "Water-Cooled Plate Assembly, Water-Cooled System, Battery, Its Housing, and Power Consumption Device," the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the field of battery technology, and in particular to water-cooled plate assemblies, water-cooling systems, batteries, their enclosures, and power-consuming devices. [Background technology]

[0003] At present, in view 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 hydroelectric power, thermal power, wind power, and solar power plants, but also widely used in multiple fields such as electric transportation tools such as electric bicycles, electric motorcycles, and electric vehicles, military equipment, aerospace, etc. With the continuous expansion of the application fields of power batteries, their market demand is also expanding.

[0004] During battery use, the cells in the battery will generate heat. Excessive heat will have a negative impact on the performance and service life of the battery. Therefore, how to effectively dissipate heat from battery cells has become an important research direction in this field. Summary of the Invention [Problem to be solved by the invention]

[0005] The present application aims to solve at least one of the problems existing in the related art, and therefore, one object of the present application is to provide a water-cooled plate assembly that improves the cooling effect on individual cells in a battery. [Means for solving the problem]

[0006] An embodiment of a first aspect of the present application provides a water-cooled plate assembly. This water-cooled plate assembly includes: a harmonica-shaped tube plate having a plurality of cooling passages formed therein extending along its length, the plurality of cooling passages being arranged in parallel along the width direction of the harmonica-shaped tube plate so that a coolant can flow through them; a first flow rectifier provided at a first end of the harmonica-shaped tube plate in the length direction and having a first rectification space formed therein that is connected to ports at one end of the plurality of cooling passages, the first flow rectifier having a first liquid inlet and a first liquid outlet formed on both sides in the thickness direction of the harmonica-shaped tube plate for the coolant to flow into and out of the first rectification space; and a second flow rectifier provided at a second end of the harmonica-shaped tube plate opposite the first end in the length direction and having a second rectification space formed therein that is connected to ports at the other ends of the plurality of cooling passages, the second liquid inlet and second liquid outlet formed on both sides in the thickness direction of the harmonica-shaped tube plate for the coolant to flow into and out of the second rectification space.

[0007] In the technical solution of the embodiments of the present application, the liquid inlet and liquid outlet of the water-cooled plate assembly are both located on both sides of the harmonica-shaped tube plate of the water-cooled plate assembly in the thickness direction. Therefore, when assembling multiple water-cooled plate assemblies into a water-cooling system, the special installation positions of the liquid inlet and liquid outlet of each water-cooled plate assembly allow the harmonica-shaped tube plates of multiple water-cooled plate assemblies to be assembled parallel to each other with a gap between them. As a result, a battery unit including cells can be placed between two adjacent water-cooled plate assemblies that are arranged parallel and with a gap between them, thereby realizing cooling on both sides of the battery unit. This arrangement improves the cooling efficiency of the battery unit and achieves balanced cooling effects above and below the battery unit.

[0008] In some embodiments, the plurality of cooling passages includes a plurality of cooling passage units arranged along the width direction of the harmonica-shaped tube sheet, each cooling passage unit among the plurality of cooling passage units includes at least one cooling passage, the first flow straightener includes a first separator provided in the first flow straightening space, the second flow straightener includes a second separator provided in the second flow straightening space, and the first separator and the second separator are arranged such that the plurality of cooling passage units are connected in series.

[0009] By connecting multiple cooling passage units in series, the multiple cooling passages form a longer cooling passage with multiple round-trip paths, allowing the coolant flowing through the harmonica-shaped tube sheet to exchange heat with the individual battery units for longer periods of time, improving heat dissipation efficiency.Furthermore, by adopting a configuration in which multiple cooling passage units are connected in series, the coolant is forced to make multiple round trips within the harmonica-shaped tube sheet, thereby relatively equalizing the temperatures of the ports at both ends of the harmonica-shaped tube sheet.

[0010] In some embodiments, the plurality of cooling passage units include a first cooling passage unit, a second cooling passage unit, and a third cooling passage unit arranged in sequence along a width direction of the harmonica-shaped tube sheet, the first separator is configured to separate a port of the first cooling passage unit from ports of cooling passages other than the first cooling passage unit among the plurality of cooling passages, and the second separator is configured to separate a port of the third cooling passage unit from ports of cooling passages other than the third cooling passage unit among the plurality of cooling passages, whereby the first cooling passage unit, the second cooling passage unit, and the third cooling passage unit are connected in series.

[0011] By adopting a configuration in which three cooling passage units are connected in series, the coolant is caused to move back and forth in an "S" shape in the harmonica-shaped tube plate, thereby relatively equalizing the temperatures of the ports at both ends of the harmonica-shaped tube plate.

[0012] In some embodiments, the first flow rectifier further includes a first flow rectifier piece and a second flow rectifier piece arranged in parallel in the thickness direction of the harmonica-shaped tube plate, the first flow rectifier piece and the second flow rectifier piece respectively protruding in two opposite directions; and the second flow rectifier further includes a third flow rectifier piece and a fourth flow rectifier piece arranged in parallel in the thickness direction of the harmonica-shaped tube plate, the third flow rectifier piece and the fourth flow rectifier piece respectively protruding in two opposite directions, at least a portion of the edges of the first flow rectifier piece and the second flow rectifier piece are joined, and the raised portions of both pieces define a first flow rectification space; and at least a portion of the edges of the third flow rectifier piece and the fourth flow rectifier piece are joined, and the raised portions of both pieces define a second flow rectification space.

[0013] The first and second flow rectifiers are both constructed by joining two flow rectifier pieces, and the raised portions of the flow rectifier pieces may be formed by simple pressing, so the structures of the first and second flow rectifiers are relatively simple and easy to produce and manufacture.

[0014] In some embodiments, the first liquid inlet and the first liquid outlet are provided in the first and second flow straightening pieces, respectively, and the second liquid inlet and the second liquid outlet are provided in the third and fourth flow straightening pieces, respectively.

[0015] By providing the first liquid inlet and first liquid outlet in the first and second flow straightening pieces, respectively, the first liquid inlet and first liquid outlet can be easily aligned in the height direction of the first flow straightener. Similarly, by providing the second liquid inlet and second liquid outlet in the third and fourth flow straightening pieces, respectively, the second liquid inlet and second liquid outlet can be easily aligned in the height direction of the second flow straightener.

[0016] In some embodiments, the projections of the first liquid inlet and the first liquid outlet on a reference plane overlap, the reference plane being a plane parallel to both sides of the thickness of the harmonica-shaped tube sheet, and the projections of the second liquid inlet and the second liquid outlet on the reference plane overlap.

[0017] With the above-described installation, when assembling multiple water-cooled plate assemblies into a water-cooling system, the liquid inlets and liquid outlets of two adjacent water-cooled plate assemblies are all located at the same level, facilitating connection between the two adjacent water-cooled plate assemblies.

[0018] In some embodiments, at least a portion of an edge of the first rectifying piece and at least a portion of an edge of the second rectifying piece are joined by welding, and at least a portion of an edge of the third rectifying piece and at least a portion of an edge of the fourth rectifying piece are joined by welding.

[0019] The welding makes the joint between the first and second rectifying pieces and the joint between the third and fourth rectifying pieces stronger.

[0020] In some embodiments, at least a portion of an edge of the first rectifying piece and at least a portion of an edge of the second rectifying piece are joined by an interlocking connection, and at least a portion of an edge of the third rectifying piece and at least a portion of an edge of the fourth rectifying piece are joined by an interlocking connection.

[0021] The joining by fastening is advantageous for quick and easy joining between the first and second rectifying pieces, and between the third and fourth rectifying pieces.

[0022] In some embodiments, a plurality of first engagement grooves are further provided on the edge of the first rectifying piece, and a plurality of first engagement portions are further provided at corresponding positions on the edge of the second rectifying piece, and the first engagement grooves are joined to the corresponding first engagement portions to realize an engagement between the first rectifying piece and the second rectifying piece, and a plurality of second engagement grooves are further provided on the edge of the third rectifying piece, and a plurality of second engagement portions are further provided at corresponding positions on the edge of the fourth rectifying piece, and the second engagement grooves are joined to the corresponding second engagement portions to realize an engagement between the third rectifying piece and the fourth rectifying piece.

[0023] The provision of a plurality of first engaging portions and first engaging grooves and a plurality of second engaging portions and second engaging grooves strengthens the connection strength between the rectifying pieces, while the provision of engaging portions and engaging grooves at corresponding positions on the two rectifying pieces makes it easier to align the two rectifying pieces.

[0024] In some embodiments, one or more of the first, second, third, and fourth rectifying pieces are further provided with a positioning portion, which is arranged to be used to align the water-cooled plate assembly with another water-cooled plate assembly during the process of installing the water-cooled plate assembly.

[0025] When assembling the multiple water-cooled plate assemblies, the multiple water-cooled plate assemblies can be aligned with one another in the height direction by referring to the positioning portions of each water-cooled plate assembly.

[0026] In some embodiments, when the first flow straightening device includes a first separator provided in the first flow straightening space, and the plurality of cooling passage units include a first cooling passage unit, a second cooling passage unit, and a third cooling passage unit arranged in sequence along the width direction of the harmonica-shaped tube sheet, the first separator further includes: a first connection segment extending along at least a portion of the edges of the first flow straightening piece and the second flow straightening piece and fixed to the inside of the edges of the first flow straightening piece and the second flow straightening piece; a first arc-shaped segment extending along at least a portion of the edges of the first liquid inlet and the first liquid outlet so as to avoid the first liquid inlet and the first liquid outlet; and a second connection segment connected to the first end edge of the harmonica-shaped tube sheet and fixed between the port of the first cooling passage unit and the port of the second cooling passage unit.

[0027] By providing a portion of the first separator as an extended structure having three segments, the first straightening space is effectively divided into two independent sub-spaces, and obstruction of the coolant's entry and exit into the first straightening space is avoided.

[0028] In some embodiments, when the second flow rectifier includes a second separator provided in the second flow rectification space, and the plurality of cooling passage units include a first cooling passage unit, a second cooling passage unit, and a third cooling passage unit arranged in sequence along the width direction of the harmonica-shaped tube sheet, the second separator further includes: a third connection segment extending along at least a portion of the edges of the third flow rectification piece and the fourth flow rectification piece and fixed to the inside of the edges of the third flow rectification piece and the fourth flow rectification piece; a second arc-shaped segment extending along at least a portion of the edges of the second liquid inlet and the second liquid outlet so as to avoid the second liquid inlet and the second liquid outlet; and a fourth connection segment connected to the second end edge of the harmonica-shaped tube sheet and fixed between the port of the third cooling passage unit and the port of the second cooling passage unit.

[0029] By providing a portion of the second separator as an extended structure having three segments, the second straightening space is effectively divided into two independent subspaces, and obstruction of the coolant's entry and exit into the second straightening space is avoided.

[0030] An embodiment of a second aspect of the present application provides a water-cooling system including the above-described water-cooled plate assembly, wherein a plurality of water-cooled plate assemblies are arranged in parallel at intervals, and 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 of the two adjacent water-cooled plate assemblies are connected to the first liquid outlet and the second liquid inlet of the other water-cooled plate assembly, respectively, to realize a connection between the two adjacent water-cooled plate assemblies.

[0031] According to the water cooling system of this embodiment, a plurality of water-cooled plate assemblies can be connected to form one cooling liquid circulation system, and the cooling liquid can be easily circulated therethrough.

[0032] In some embodiments, the above-mentioned water-cooled system further includes a plurality of connecting pipes, each of which is used to connect the first liquid inlet and the first liquid outlet of two adjacent water-cooled plate assemblies, or to connect the second liquid inlet and the second liquid outlet of two adjacent water-cooled plate assemblies, and the first liquid inlet, the second liquid inlet, the first liquid outlet, and the second liquid outlet of each water-cooled plate assembly of the water-cooled system are all formed with flanges that protrude toward the outside of the water-cooled plate assembly, and the flanges are inserted into the corresponding connecting pipes to realize the connection between the first liquid inlet, the second liquid inlet, the first liquid outlet, or the second liquid outlet and the connecting pipe.

[0033] By connecting the liquid inlet and liquid outlet of two adjacent water-cooled plate assemblies at the front and rear with a connecting pipe, the connection strength between the water-cooled plate assemblies is improved and a predetermined gap is ensured between adjacent water-cooled plate assemblies, which are used to accommodate individual batteries.

[0034] An embodiment of a third aspect of the present application provides a battery housing, the housing being used to house a single battery and including a water-cooled plate assembly attached to the single battery to cool the single battery.

[0035] An embodiment of the fourth aspect of the present application provides a battery, which includes a battery unit and a housing for accommodating the battery unit in the above-described embodiment.

[0036] An embodiment of a fifth aspect of the present application provides a battery, the battery including the water-cooling system of the above-described embodiment and a plurality of battery units, at least some of the battery units being provided in a gap between two adjacent water-cooled plate assemblies of the water-cooling system, and two opposing sides of each of the at least some of the battery units being attached to the harmonica-shaped tube plates of the two adjacent water-cooled plate assemblies, respectively, so that the two opposing sides of each battery unit are cooled by the water-cooling system.

[0037] According to the battery of this embodiment, the two adjacent water-cooled plate assemblies of the water-cooling system can respectively cool two opposing sides of each battery unit, thereby improving the cooling efficiency of the battery unit and achieving a balanced cooling effect above and below the battery unit.

[0038] An embodiment of the sixth aspect of the present application provides a power consuming device, the power consuming device including a battery for providing power as in any of the above-mentioned embodiments.

[0039] The above description is merely an outline of the technical solution of the present application. In order to allow the technical means of the present application to be more clearly understood and then implemented in accordance with the contents of the specification, and to make the above-mentioned and other objects, features and advantages of the present application more comprehensible, specific embodiments of the present application are particularly listed below. [Brief explanation of the drawings]

[0040] In the drawings, unless otherwise specified, the same reference numerals in several drawings indicate the same or similar parts or elements. The drawings are not necessarily drawn to scale. It is understood that the drawings depict only some embodiments disclosed herein and should not be considered as limiting the scope of the present application. [Figure 1] 1 is a structural schematic diagram of a vehicle according to some embodiments of the present application. [Figure 2] 1 is a schematic exploded view of a battery according to some embodiments of the present application; [Figure 3] FIG. 2 is a schematic diagram of an assembled battery according to some embodiments of the present application. [Figure 4] 1 is a structural schematic diagram of a water-cooled plate assembly according to some embodiments of the present application; [Figure 5] 1 is a structural schematic diagram of one end of a first flow straightener of a water-cooled plate assembly according to some embodiments of the present application. [Figure 6] 1 is a structural schematic diagram of one end of a second flow straightener of a water-cooled plate assembly according to some embodiments of the present application. [Figure 7]1 is an exploded structural schematic diagram of a first flow straightener of a water-cooled plate assembly according to some embodiments of the present application. FIG. [Figure 8] 2 is a structural schematic diagram of a first separator according to some embodiments of the present application; FIG. [Figure 9] 2 is a structural schematic diagram of a second separator according to some embodiments of the present application; FIG. DETAILED DESCRIPTION OF THE INVENTION

[0041] Hereinafter, the embodiments of the technical solution of the present application will be described in detail with reference to the drawings. The following embodiments are merely for the purpose of more clearly illustrating the technical solution of the present application, and are merely illustrative and do not limit the scope of protection of the present application.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art. The terms used herein are only for describing specific embodiments and are not intended to limit the present application. The terms "comprises," "having," and any variations thereof in the specification, claims, and description of the drawings of this application are intended to cover the non-exclusive "comprises."

[0043] In the description of the embodiments of the present application, technical terms such as "first," "second," etc. are used to distinguish between different objects, and should not be understood as indicating or implying relative importance, or suggesting the quantity, specific order, or hierarchical relationship of the technical features shown. In the description of the embodiments of the present application, unless otherwise clearly and specifically limited, "plurality" means two or more.

[0044] In this specification, when an "embodiment" is mentioned, it means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearance of such a term in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment with other embodiments. Those skilled in the art can clearly or implicitly understand that the embodiment described in this specification can be combined with other embodiments.

[0045] In the description of the embodiments of the present application, the term "and / or" merely describes the relationship between related objects and indicates that three relationships are possible; for example, A and / or B can indicate three cases: only A exists, A and B exist simultaneously, and only B exists. In addition, in this specification, the character " / " generally indicates that the related objects before and after it are in an "or" relationship.

[0046] In describing the examples of the present application, the term "plurality" refers to two or more (including two); similarly, "multiple groups" refers to two or more (including two groups); and "multiple sheets" refers to two or more (including two).

[0047] In describing the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" are orientations or positional relationships based on the drawings and are intended merely for the convenience and simplification of the description of the embodiments of the present application. They do not indicate or imply that the devices or elements shown must have a specific orientation, be configured, or operate in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

[0048] In describing the embodiments of the present application, unless otherwise clearly specified or limited, the terms "attached," "coupled," "connected," "fixed," etc. should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, or integration, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intervening object, an internal communication between two elements, or an interactive relationship between two elements. Those skilled in the art will be able to understand the specific meanings of the above terms in the embodiments of the present application according to specific circumstances.

[0049] At present, in view 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 hydroelectric power, thermal power, wind power, and solar power plants, but also widely used in multiple fields such as electric transportation tools such as electric bicycles, electric motorcycles, and electric vehicles, military equipment, aerospace, etc. With the continuous expansion of the application fields of power batteries, their market demand is also expanding.

[0050] The applicant of the present application has noticed that cells generate heat during battery use. Excessive heat can adversely affect the performance and service life of the battery. In related art, a cooling system can be provided to cool the cells in the battery. The cooling system may include a plurality of water-cooled plates installed at the bottom of the battery housing, with the upper surfaces of the water-cooled plates contacting the lower surfaces of the cells in the battery. During use, a coolant, such as water, flows through the plurality of water-cooled plates to remove heat from the cells and lower their temperature.

[0051] However, the applicant discovered that the water-cooled plate in the related art only contacts the bottom of the cell, so heat can only be dissipated from the bottom surface of the cell. This causes two problems: insufficient heat dissipation from the cell and low heat dissipation efficiency. Furthermore, because only the bottom surface of the cell is cooled, the heat at the top surface of the cell is significantly greater than that at the bottom surface of the cell, resulting in uneven thermal expansion between the top and bottom of the cell. This uneven thermal expansion may affect battery performance.

[0052] Based on the above considerations, in order to solve the problems of insufficient and uneven heat dissipation from the cells, the applicant has conducted extensive research and designed a water-cooled plate assembly, in which the liquid inlet and liquid outlet are both located on both sides of the thickness of the harmonica-shaped tube plate of the water-cooled plate assembly. When assembling multiple water-cooled plate assemblies into a water-cooling system, the special installation positions of the liquid inlet and liquid outlet of each water-cooled plate assembly allow the multiple water-cooled plate assemblies to be assembled in parallel and spaced apart. As a result, a battery unit including cells can be placed between two adjacent water-cooled plate assemblies arranged in parallel and spaced apart, thereby realizing cooling on both sides of the battery unit (or cell). This arrangement improves the cooling efficiency of the battery unit and achieves balanced cooling effects above and below the battery unit.

[0053] The batteries disclosed in the embodiments of the present application may be used in power consumption devices such as, but not limited to, vehicles, ships, and aircraft, etc. The water-cooled plate assembly, water-cooling system, and battery disclosed in the present application may be used to configure a power supply system for the power consumption device, which is advantageous for improving the cooling effect for the battery itself, improving the stability of battery performance, and extending the battery life.

[0054] An embodiment of the present application provides a battery-powered power consumption device, which may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a boat, a spacecraft, etc. The electric toy may include a stationary or mobile electric toy, such as a game console, an electric car toy, an electric boat toy, and an electric plane toy, and the spacecraft may include an airplane, a rocket, a space shuttle, and a spaceship, etc.

[0055] In the following embodiment, for convenience of explanation, a vehicle 1 will be taken as an example of the power consumption device of an embodiment of the present application.

[0056] Referring to FIG. 1, FIG. 1 is a structural schematic diagram of a vehicle 1 according to some embodiments of the present application. The vehicle 1 may be a gasoline-powered vehicle, a gas-powered vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, a range-extended vehicle, etc. A battery 10 is provided inside the vehicle 1, and the battery 10 may be provided at the bottom, head, or tail of the vehicle 1. The battery 10 may be used to power the vehicle 1, for example, the battery 10 may serve as an operating power source for the vehicle 1. The vehicle 1 may further include a controller 20 and a motor 30, and the controller 20 is used to control the battery 10 to power the motor 30, for example, to meet the operating power consumption needs of the vehicle 1 during startup, navigation, and driving.

[0057] In some embodiments of the present application, the battery 10 can be not only the operating power source for the vehicle 1, but also the driving power source for the vehicle 1, replacing or partially replacing gasoline or natural gas to provide driving power for the vehicle 1.

[0058] 2 and 3, FIG. 2 is an exploded view of a battery 10 according to some embodiments of the present application, and FIG. 3 is a schematic assembly view of the battery 10 according to some embodiments of the present application. The battery 10 includes a housing 100 and a battery unit 200, and the battery unit 200 is housed within the housing 100. Here, the housing 100 is used to provide a housing space for the battery unit 200, and the housing 100 may have various structures. In some embodiments, the housing 100 may include a first portion 110 and a second portion 120, and the first portion 110 and the second portion 120 are engaged with each other, and the first portion 110, together with the second portion 120, define a housing space for housing the battery unit 200. The second part 120 may have a hollow structure with one end open, the first part 110 may have a plate-like structure, and the first part 110 is engaged with the open side of the second part 120, so that the first part 110 and the second part 120 define an accommodating space, or both the first part 110 and the second part 120 may have a hollow structure with one end open, and the open side of the first part 110 is engaged with the open side of the second part 120. Of course, the housing 100 formed by the first part 110 and the second part 120 may have various shapes, such as a cylinder or a rectangular parallelepiped.

[0059] The battery 100 may include a plurality of battery units 200, and the plurality of battery units 200 may be connected in series, in parallel, or in series-parallel. A series-parallel connection means that some of the plurality of battery units 200 are connected in series and others are connected in parallel. The plurality of battery units 200 may be directly connected in series, in parallel, or in series-parallel, and then the entire battery unit 200 may be housed within the housing 10. Of course, the battery 100 may first have a plurality of battery units 200 connected in series, in parallel, or in series-parallel to form a battery module, and then the plurality of battery modules may be connected in series, in parallel, or in series-parallel to form a whole and housed within the housing 10. The battery 100 may further include other structures, for example, the battery 100 may further include bus bar members for establishing electrical connection between the plurality of battery units 200.

[0060] Here, each battery unit 200 may be a secondary battery or a primary battery, and may be, but is not limited to, a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery. The battery unit 200 may be cylindrical, flat, rectangular, or have other shapes.

[0061] The present application first provides a water-cooled plate assembly 300. As shown in FIG. 4, this is a structural schematic diagram of the water-cooled plate assembly 300 of some embodiments of the present application. The water-cooled plate assembly 300 includes a harmonica-shaped tube sheet 370, a first flow rectifier 310, and a second flow rectifier 320. A plurality of cooling passages extending along the length of the harmonica-shaped tube sheet 370 are formed inside the harmonica-shaped tube sheet 370, and the plurality of cooling passages are arranged in parallel along the width of the harmonica-shaped tube sheet 370 so that a coolant can flow through them. The first flow rectifier 310 is provided at a first end in the length direction of the harmonica-shaped tube sheet 370, and has a first rectification space formed therein that communicates with ports at one ends of the plurality of cooling passages, and the first flow rectifier 310 is provided with a first liquid inlet 330 and a first liquid outlet 340, respectively, for the coolant to flow into and out of the first rectification space, on both sides in the thickness direction of the harmonica-shaped tube sheet 370. The second flow rectifier 320 is provided at a second end opposite to the first end in the length direction of the harmonica-shaped tube sheet 370, and has a second rectification space formed therein that communicates with ports at the other ends of the plurality of cooling passages, and the second flow rectifier 320 is provided with a second liquid inlet 350 and a second liquid outlet 360, respectively, for the coolant to flow into and out of the second rectification space, on both sides in the thickness direction of the harmonica-shaped tube sheet 370.

[0062] As shown in FIG. 4, the harmonica-shaped tube sheet 370 has a length direction (see the X-axis direction in FIG. 4), a width direction (see the Y-axis direction in FIG. 4), and a thickness direction (see the Z-axis direction in FIG. 4). A plurality of cooling passages are formed inside the harmonica-shaped tube sheet 370. Each of the plurality of cooling passages described above extends along the X-axis direction in the drawing, and the plurality of cooling passages are arranged in the Y-axis direction in the drawing. Similarly, two adjacent cooling passages are separated by a partition wall also extending along the X-axis direction. Each cooling passage has two ports, and these two ports are directed toward the first flow rectifier 310 and the second flow rectifier 320, respectively. Therefore, both ends of the harmonica-shaped tube sheet 370 in the length direction have a plurality of cooling passage ports. The plurality of ports are separated by the ends of the partition walls inside the harmonica-shaped tube sheet 370.

[0063] The first flow rectifier 310 and the second flow rectifier 320 are respectively provided at a first end and a second end in the longitudinal direction of the harmonica-shaped tube sheet 370. The first flow rectifier 310 includes a first case, and a first flow rectifying space is formed inside the first case. One side of the first case facing the harmonica-shaped tube sheet 370 is open and connected to the first end of the harmonica-shaped tube sheet 370. Therefore, ports at one end of the multiple cooling passages in the harmonica-shaped tube sheet 370 are connected to the first flow rectifying space. The second flow rectifier 320 includes a second case, and a second flow rectifying space is formed inside the second case. One side of the second case facing the harmonica-shaped tube sheet 370 is open and connected to the second end of the harmonica-shaped tube sheet 370. Therefore, ports at the other end of the multiple cooling passages in the harmonica-shaped tube sheet 370 are connected to the second flow rectifying space. In some embodiments, the first flow straightener 310 and the second flow straightener 320 have the same size and shape, and are provided symmetrically at both ends of the harmonica-shaped tube sheet 370 in the longitudinal direction.

[0064] The liquid inlet and liquid outlet of the water-cooled plate assembly 300 are both located on both sides of the harmonica-shaped tube plate 370 of the water-cooled plate assembly 300 in the thickness direction. Therefore, when assembling multiple water-cooled plate assemblies 300 into the water-cooling system 130, the specific installation positions of the liquid inlet and outlet of each water-cooled plate assembly 300 allow the harmonica-shaped tube plates 370 of the multiple water-cooled plate assemblies 300 to be assembled parallel to each other with a gap between them. As a result, a single battery 200 can be placed between two adjacent water-cooled plate assemblies 300 that are arranged parallel to each other with a gap between them, thereby cooling both sides of the single battery 200. This arrangement improves the cooling efficiency of the single battery 200 and achieves balanced cooling effects above and below the single battery 200.

[0065] According to some embodiments of the present application, the plurality of cooling passages includes a plurality of cooling passage units arranged along the width direction of harmonica-shaped tube sheet 370, and each of the plurality of cooling passage units includes at least one cooling passage. First flow rectifier 310 includes first separator 313 provided in the first flow rectification space, and second flow rectifier 320 includes second separator 323 provided in the second flow rectification space, and first separator 313 and second separator 323 are arranged such that the plurality of cooling passage units are connected in series.

[0066] As shown in FIGS. 5 and 6 , FIG. 5 is a structural schematic diagram of one end of a first flow straightener 310 of a water-cooled plate assembly 300 according to some embodiments of the present disclosure, and FIG. 6 is a structural schematic diagram of one end of a second flow straightener 320 of a water-cooled plate assembly 300 according to some embodiments of the present disclosure. The above-described multiple cooling passages may include three cooling passage units, and each cooling passage unit may include an equal or unequal number of cooling passages. In FIGS. 5 and 6 , the boundaries between the three cooling passage units are indicated by dashed lines. In this embodiment, the cooling passage is shown to include three cooling passage units. However, in some other embodiments, the cooling passage may include more than three sets of cooling passage units, such as five, six, or eight sets. The first separator 313 and the second separator 323 connect the ports of the three sets of cooling passage units at the beginning and end, respectively, to form a single “S”-shaped passage as a whole. 4 to 6, the flow path of the coolant in the harmonica-shaped tube sheet 370 may be indicated by dashed arrows in the drawings. As can be understood, for more than three cooling passage units, series connection of multiple cooling passage units may be achieved by setting the shapes of the first separator 313 and the second separator 323 and their positions in the flow straightening space. As can be understood, more than three cooling passage units may collectively form a passage having more round-trip paths than an "S" shape, for example, an "M" shape or even a double "S" shape.

[0067] By connecting multiple cooling passage units in series, the multiple cooling passages form a longer passage with multiple round-trip paths, allowing the coolant flowing through the harmonica-shaped tube sheet 370 to exchange heat with the battery units 200 for a longer period of time, improving heat dissipation efficiency. In related art, the coolant simply flows from one end port to the other end port of multiple cooling passages, resulting in a relatively low temperature at the port where the coolant flows in because the coolant has not yet exchanged heat with the battery units 200, while the temperature at the port where the coolant flows out is relatively high. This results in a relatively large temperature difference between both ends of the harmonica-shaped tube sheet 370 in the longitudinal direction, which is unfavorable for balanced heat dissipation from the batteries. This embodiment employs a configuration in which multiple cooling passage units are connected in series, causing the coolant to move back and forth multiple times within the harmonica-shaped tube sheet 370, thereby relatively equalizing the temperatures of the ports at both ends of the harmonica-shaped tube sheet 370.

[0068] According to some embodiments of the present application, the plurality of cooling passage units includes a first cooling passage unit 371, a second cooling passage unit 372, and a third cooling passage unit 373, which are sequentially arranged along the width direction of the harmonica-shaped tube sheet 370. The first separator 313 is configured to separate the port of the first cooling passage unit 371 from the ports of cooling passages other than the first cooling passage unit 371 among the plurality of cooling passages, and the second separator 323 is configured to separate the port of the third cooling passage unit 373 from the ports of cooling passages other than the third cooling passage unit 373 among the plurality of cooling passages, thereby connecting the first cooling passage unit 371, the second cooling passage unit 372, and the third cooling passage unit 373 in series.

[0069] Continuing with reference to Fig. 4, as shown in Fig. 4, the plurality of cooling passage units includes three cooling passage units, namely, a first cooling passage unit 371, a second cooling passage unit 372, and a third cooling passage unit 373. The first cooling passage unit 371 is located at an upper portion of the harmonica-shaped tube sheet 370, the second cooling passage unit 372 is located at a central portion of the harmonica-shaped tube sheet 370, and the third cooling passage unit 373 is located at a lower portion of the harmonica-shaped tube sheet 370. The first cooling passage unit 371, the second cooling passage unit 372, and the third cooling passage unit 373 may include the same number of cooling passages. As shown in Fig. 5, in the first flow straightening space, a first separator 313 divides the space into two independent partial spaces, one of which is connected to the ports of a first cooling passage unit 371, and the other is connected to the ports of a second cooling passage unit 372 and a third cooling passage unit 373. As shown in Fig. 6, in the second flow straightening space, a second separator 323 divides the space into two independent partial spaces, one of which is connected to the ports of a first cooling passage unit 371 and a second cooling passage unit 372, and the other is connected to the port of a third cooling passage unit 373. By providing the spaces in this manner, the ports of the first cooling passage unit 371, the second cooling passage unit 372, and the third cooling passage unit 373 are connected in series, with their heads connected to their tails.

[0070] In this embodiment, three cooling passage units are connected in series, and the coolant moves back and forth in an "S" shape in the harmonica-shaped tube sheet 370, thereby relatively equalizing the temperatures of the ports at both ends of the harmonica-shaped tube sheet 370.

[0071] According to some embodiments of the present application, the first flow rectifier 310 further includes a first flow rectifier piece 311 and a second flow rectifier piece 312 arranged in parallel in the thickness direction of the harmonica-shaped tube sheet 370, where the first flow rectifier piece 311 and the second flow rectifier piece 312 are respectively raised in two opposite directions. The second flow rectifier 320 further includes a third flow rectifier piece 321 and a fourth flow rectifier piece 322 arranged in parallel in the thickness direction of the harmonica-shaped tube sheet 370, where the third flow rectifier piece 321 and the fourth flow rectifier piece 322 are respectively raised in two opposite directions. At least a portion of the edges of the first and second flow straightening pieces 311 and 312 are joined together, and the raised portions of both define a first flow straightening space, and at least a portion of the edges of the third and fourth flow straightening pieces 321 and 322 are joined together, and the raised portions of both define a second flow straightening space.

[0072] 5 and 6, the first case of the first flow rectifier 310 is formed by joining a first flow rectifier piece 311 and a second flow rectifier piece 312, and the central regions of the first flow rectifier piece 311 and the second flow rectifier piece 312 are raised in two opposite directions, for example, toward both sides in the thickness direction of the harmonica-shaped tube sheet 370, thereby forming a recess on each of the opposing sides of the first flow rectifier piece 311 and the second flow rectifier piece 312. The edges of the first flow rectifier piece 311 and the second flow rectifier piece 312 are joined together to form a first flow rectification space between the two pieces, which is approximately the same as the thickness of the harmonica-shaped tube sheet 370. The second case of the second flow rectifier 320 is formed by joining a third flow rectifier piece 321 and a fourth flow rectifier piece 322, and the central regions of the third flow rectifier piece 321 and the fourth flow rectifier piece 322 are raised in two opposite directions, for example, toward both sides in the thickness direction of the harmonica-shaped tube sheet 370, thereby forming a recess on each opposing side of the third flow rectifier piece 321 and the fourth flow rectifier piece 322. The edges of the third flow rectifier piece 321 and the fourth flow rectifier piece 322 are joined together to form a second flow rectification space between the two pieces, which is approximately the same as the thickness of the harmonica-shaped tube sheet 370.

[0073] The first and second flow rectifiers 310 and 320 are each formed by joining two flow rectifier pieces, and the raised portions of the flow rectifier pieces may be formed by simple pressing. Therefore, the structures of the first and second flow rectifiers 310 and 320 are relatively simple, and are convenient to produce and manufacture.

[0074] In some embodiments, the first liquid inlet 330 and the first liquid outlet 340 are provided in the first flow straightening piece 311 and the second flow straightening piece 312, respectively. The second liquid inlet 350 and the second liquid outlet 360 are provided in the third flow straightening piece 321 and the fourth flow straightening piece 322, respectively.

[0075] The raised portions of the first flow straightening piece 311 and the second flow straightening piece 312 may be formed as flat surfaces, so that the first liquid inlet 330 and the first liquid outlet 340 can be conveniently opened in the raised portions of the first flow straightening piece 311 and the second flow straightening piece 312, respectively. The raised portions of the third flow straightening piece 321 and the fourth flow straightening piece 322 may be formed as flat surfaces, so that the second liquid inlet 350 and the second liquid outlet 360 can be opened in the raised portions of the third flow straightening piece 321 and the fourth flow straightening piece 322, respectively.

[0076] By providing the first liquid inlet 330 and the first liquid outlet 340 in the first flow straightening piece 311 and the second flow straightening piece 312, respectively, the first liquid inlet 330 and the first liquid outlet 340 can be easily aligned in the height direction of the first flow straightening piece 310. Similarly, by providing the second liquid inlet 350 and the second liquid outlet 360 in the third flow straightening piece 321 and the fourth flow straightening piece 322, respectively, the second liquid inlet 350 and the second liquid outlet 360 can be easily aligned in the height direction of the second flow straightening piece 320.

[0077] In some embodiments, the projections of the first liquid inlet 330 and the first liquid outlet 340 on a reference plane overlap. The reference plane refers to a plane that is parallel to both sides of the thickness of the harmonica-shaped tube sheet 370. Similarly, the projections of the second liquid inlet 350 and the second liquid outlet 360 on the reference plane overlap.

[0078] 5 and 6 , when the projections of the first liquid inlet 330 and the first liquid outlet 340 on the reference plane overlap, this means that the first liquid inlet 330 and the first liquid outlet 340 are provided at the same height of the first flow rectifier 310, and when the projections of the second liquid inlet 350 and the second liquid outlet 360 on the reference plane overlap, this means that the second liquid inlet 350 and the second liquid outlet 360 are provided at the same height of the second flow rectifier 320. In some embodiments, the first liquid inlet 330, the first liquid outlet 340, the second liquid inlet 350, and the second liquid outlet 360 may all be provided at the center of the height direction of the first flow rectifier 310 or the second flow rectifier 320.

[0079] By configuring the water-cooled plate assemblies 300 in this manner, when assembling multiple water-cooled plate assemblies 300 into the water-cooling system 130, the liquid inlets and outlets of two adjacent water-cooled plate assemblies 300 are all located at the same level, facilitating connection between the two adjacent water-cooled plate assemblies 300.

[0080] In some embodiments, at least a portion of an edge of the first flow rectifying piece 311 and at least a portion of an edge of the second flow rectifying piece 312 are joined by welding, and at least a portion of an edge of the third flow rectifying piece 321 and at least a portion of an edge of the fourth flow rectifying piece 322 are joined by welding.

[0081] The welding makes the joint between the first and second flow rectifying pieces 311 and 312, and the joint between the third and fourth flow rectifying pieces 321 and 322 stronger.

[0082] In some embodiments, at least a portion of an edge of the first flow rectifying piece 311 and at least a portion of an edge of the second flow rectifying piece 312 are joined by engagement, and at least a portion of an edge of the third flow rectifying piece 321 and at least a portion of an edge of the fourth flow rectifying piece 322 are joined by engagement.

[0083] The joining by fastening is advantageous for quick and easy joining between the first rectifying piece 311 and the second rectifying piece 312, and between the third rectifying piece 321 and the fourth rectifying piece 322.

[0084] According to some embodiments of the present application, as shown in FIG. 7, FIG. 7 is a schematic exploded structural view of the first flow rectifier 310 of the water-cooled plate assembly 300 of some embodiments of the present application, in which a plurality of first engagement grooves 311a are further provided on the edge of the first flow rectifier piece 311, and a plurality of first engagement portions 312b are further provided at corresponding positions on the edge of the second flow rectifier piece 312, and the first engagement grooves 311a are joined to the corresponding first engagement portions 312b, thereby realizing the engagement between the first flow rectifier piece 311 and the second flow rectifier piece 312 by engagement. A plurality of second engagement grooves (not shown) are further provided on the edge of the third rectifying piece 321, and a plurality of second engagement portions (not shown) are further provided at corresponding positions on the edge of the fourth rectifying piece 322, and the second engagement grooves are joined to the corresponding second engagement portions, thereby achieving an engagement between the third rectifying piece 321 and the fourth rectifying piece 322.

[0085] 7, first engaging grooves 311a are provided at multiple corner positions on the edge of the first flow rectifying piece 311, and three other first engaging grooves 311a are further provided on vertical edge segments of the first flow rectifying piece 311. A plurality of first engaging portions 312b are provided at corresponding positions on the edge of the second flow rectifying piece 312, and these engaging portions may be in the form of engaging claws, for example, so that when the first flow rectifying piece 311 and the second flow rectifying piece 312 are joined, the engaging claws of the first engaging portions 312b clamp the outer side of the second flow rectifying piece 312. The installation position and operation principle of the second engaging portions and second engaging grooves are similar to those of the first engaging portions 312b and first engaging groove 311a, and will not be further described here.

[0086] The provision of the plurality of first engaging portions 312b and first engaging grooves 311a and the plurality of second engaging portions and second engaging grooves strengthens the connection strength between the rectifying pieces, while the provision of the engaging portions and engaging grooves at corresponding positions on the two rectifying pieces makes it easy to align the two rectifying pieces.

[0087] According to some embodiments of the present application, one or more of the first rectifying piece 311, the second rectifying piece 312, the third rectifying piece 321 and the fourth rectifying piece 322 may further be provided with a positioning portion, which is arranged to align the water-cooled plate assembly 300 with other water-cooled plate assemblies 300 during the process of installing the water-cooled plate assembly 300.

[0088] As shown in FIG. 7 , the positioning portion may include a first positioning hole 311c provided in the first flow rectifier piece 311 of the first flow rectifier 310 and a second positioning hole 312c provided in the second flow rectifier piece 312. When joining the first flow rectifier piece 311 and the second flow rectifier piece 312, the first positioning hole 311c and the second positioning hole 312c are aligned. Furthermore, when assembling multiple water-cooled plate assemblies 300, the multiple water-cooled plate assemblies 300 may be aligned with each other in the height direction (i.e., the Y direction shown in FIG. 4 ) by referring to the positioning portion of each water-cooled plate assembly 300. In this embodiment, the positioning portion is provided in the first flow rectifier 310; however, in some other embodiments, the positioning portion may be provided in the second flow rectifier 320, or may be provided in both the first flow rectifier 310 and the second flow rectifier 320.

[0089] When the first flow rectifier 310 includes a first separator 313 disposed in the first rectifying space, and the plurality of cooling passage units include a first cooling passage unit 371, a second cooling passage unit 372, and a third cooling passage unit 373 arranged in sequence along the width direction of the harmonica-shaped tube sheet 370, the first separator 313 further includes a first connecting segment 313a, a first arc-shaped segment 313b, and a second connecting segment 313c. The first connecting segment 313a extends along at least a portion of the edges of the first flow rectifying piece 311 and the second flow rectifying piece 312 and is fixed to the inside of the edges of the first flow rectifying piece 311 and the second flow rectifying piece 312. The first arc-shaped segment 313b extends along at least a portion of the edges of the first liquid inlet 330 and the first liquid outlet 340 to avoid the first liquid inlet 330 and the first liquid outlet 340. The second connecting segment 313 c is connected to the edge of the first end of the harmonica-shaped tube sheet 370 and fixed between the port of the first cooling passage unit 371 and the port of the second cooling passage unit 372 .

[0090] FIG. 8 is a structural schematic diagram of a first separator 313 according to some embodiments of the present application, and FIG. 9 is a structural schematic diagram of a second separator 323 according to some embodiments of the present application. As shown in FIGS. 5 and 8 , the first separator 313 includes a first body 313d and a first burring formed on at least a portion of an edge of the first body 313d. The first body 313d is a planar sheet-like structure that is bonded to the second flow rectifying piece 312. For example, the first body 313d may be fixed to the inner surface of the second flow rectifying piece 312 by welding. The first burring protrudes toward the first flow rectifying piece 311, and after the first flow rectifying piece 311 is joined to the second flow rectifying piece 312, the upper edge of the first burring contacts the inner surface of the first flow rectifying piece 311. Therefore, the first burring acts to divide the first flow straightening space into two subspaces. The first burring includes a first connecting segment 313a, a first arc-shaped segment 313b, and a second connecting segment 313c. One end of the first connecting segment 313a abuts the inside edges of the first flow straightening piece 311 and the second flow straightening piece 312. The first arc-shaped segment 313b and at least a portion of the edge of the first liquid outlet 340 coincide with each other, thereby preventing the coolant from entering or exiting the first flow straightening space. One end of the second connecting segment 313c is connected to a partition wall between the port of the first cooling passage unit 371 and the port of the second cooling passage unit 372 in the harmonica-shaped tube sheet 370, thus dividing the two cooling passage units.

[0091] By providing a portion of the first separator 313 as an extended structure having three segments, the first straightening space is effectively divided into two independent sub-spaces, and obstruction of the coolant's flow into and out of the first straightening space is avoided.

[0092] When the second flow rectifier 320 includes a second separator 323 disposed in the second flow rectification space, and the plurality of cooling passage units include a first cooling passage unit 371, a second cooling passage unit 372, and a third cooling passage unit 373 arranged in sequence across the width of the harmonica-shaped tube sheet 370, the second separator 323 further includes a third connecting segment 323a, a second arc-shaped segment 323b, and a fourth connecting segment 323c. The third connecting segment 323a extends along at least a portion of the edges of the third flow rectification piece 321 and the fourth flow rectification piece 322, and is fixed to the inside of the edges of the third flow rectification piece 321 and the fourth flow rectification piece 322. The second arc-shaped segment 323b extends along at least a portion of the edges of the second liquid inlet 350 and the second liquid outlet 360, avoiding the second liquid inlet 350 and the second liquid outlet 360. The fourth connecting segment 323 c is connected to the edge of the second end of the harmonica-shaped tube sheet 370 and is fixed between the port of the third cooling passage unit 373 and the port of the second cooling passage unit 372 .

[0093] As shown in FIGS. 6 and 9 , the second separator 323 includes a second body portion 323d and a second burring formed on at least a portion of the edge of the second body portion 323d. The second body portion 323d is a flat sheet-like structure bonded to the third flow rectifying piece 321. For example, the second body portion 323d may be fixed to the inside of the third flow rectifying piece 321 by welding. The second burring protrudes toward the fourth flow rectifying piece 322, and after the third flow rectifying piece 321 is joined to the fourth flow rectifying piece 322, the upper edge of the second burring contacts the inside of the fourth flow rectifying piece 322. Therefore, the second burring serves to divide the second flow rectifying space into two subspaces. The second burring includes a third connecting segment 323a, a second arc-shaped segment 323b, and a fourth connecting segment 323c. One end of the third connecting segment 323a abuts against the inside edges of the third and fourth flow straightening pieces 321 and 322. The second arc-shaped segment 323b coincides with at least a portion of the edge of the second liquid inlet 350, thereby avoiding obstruction of the coolant flowing into and out of the second flow straightening space. One end of the fourth connecting segment 323c is connected to the partition wall between the port of the second cooling passage unit 372 and the port of the third cooling passage unit 373 in the harmonica-shaped tube sheet 370, thus separating the two cooling passage units.

[0094] By providing a portion of the second separator 323 in an extended structure having three segments, the second straightening space is effectively divided into two independent sub-spaces, and obstruction of the coolant's entry and exit into the second straightening space is avoided.

[0095] The present application further provides a water-cooling system 130. Returning to FIG. 2 , the water-cooling system 130 includes the above-described plurality of water-cooled plate assemblies 300. The plurality of water-cooled plate assemblies 300 are arranged in parallel at intervals, and for any two adjacent water-cooled plate assemblies 300 among the plurality of water-cooled plate assemblies 300, the first liquid inlet 330 and the second liquid outlet 360 of one of the two adjacent water-cooled plate assemblies 300 are connected to the first liquid outlet 340 and the second liquid inlet 350 of the other water-cooled plate assembly 300, respectively, to realize a connection between the two adjacent water-cooled plate assemblies 300.

[0096] The water cooling system 130 includes multiple water-cooled plate assemblies 300, for example, six water-cooled plate assemblies 300 as shown in FIG. 2. However, in some other embodiments, the water cooling system 130 may include more or fewer than six water-cooled plate assemblies 300. The first liquid inlet 330 of the first row of water-cooled plate assemblies 300 (the front-most water-cooled plate assembly 300 shown in FIG. 2) constitutes the total liquid inlet for the entire water cooling system 130, and its second liquid outlet 360 constitutes the total liquid outlet for the entire water cooling system 130. For any one of the central rows of water-cooled plate assemblies 300, its first liquid inlet 330 is connected to the first liquid outlet 340 of the preceding water-cooled plate assembly 300, its first liquid outlet 340 is connected to the first liquid inlet 330 of the following water-cooled plate assembly 300, its second liquid inlet 350 is connected to the second liquid outlet 360 of the following water-cooled plate assembly 300, and its second liquid outlet 360 is connected to the second liquid inlet 350 of the preceding water-cooled plate assembly 300. The first liquid outlet 340 and second liquid inlet 350 of the water-cooled plate assembly 300 in the last row are blocked. With this configuration, the water cooling system 130 forms a circulation system for the coolant, with the coolant entering through the first liquid inlet 330 of the first row of water-cooled plate assemblies 300 in the water cooling system 130 and reaching the first flow rectification spaces of the multiple rows of water-cooled plate assemblies 300. For each water-cooled plate assembly 300, the coolant flows from its first flow rectification space to the second flow rectification space via the cooling passages in the harmonica-shaped tube plate 370. Finally, the coolant is collected in the second flow rectification spaces of the multiple rows of water-cooled plate assemblies 300 and finally flows out through the second liquid outlet 360 of the first row of water-cooled plate assemblies 300. The flowing coolant may be cooled by a cooling device external to the battery before re-entering the first liquid inlet 330 of the first row of water-cooled plate assemblies 300.

[0097] According to the water cooling system 130 of this embodiment, a single cooling liquid circulation system can be formed by connecting a plurality of water cooling plate assemblies 300, and the cooling liquid can be easily circulated therethrough.

[0098] 5 and 6 , the water-cooling system 130 further includes a plurality of connecting pipes 400, each of which is used to connect the first liquid inlet 330 and the first liquid outlet 340 of two adjacent water-cooled plate assemblies 300, or to connect the second liquid inlet 350 and the second liquid outlet 360 of two adjacent water-cooled plate assemblies 300. The first liquid inlet 330, the second liquid inlet 350, the first liquid outlet 340, and the second liquid outlet 360 of each water-cooled plate assembly 300 in the water-cooling system 130 are each formed with a flange that protrudes toward the outside of the water-cooled plate assembly 300. The flange is inserted into the corresponding connecting pipe 400, thereby realizing connection between the first liquid inlet 330, the second liquid inlet 350, the first liquid outlet 340, or the second liquid outlet 360 and the connecting pipe 400.

[0099] By connecting the liquid inlet and liquid outlet of two adjacent water-cooled plate assemblies 300 at the front and rear with the connecting pipe 400, the connection strength between the water-cooled plate assemblies 300 is improved and a predetermined gap is ensured between adjacent water-cooled plate assemblies 300, which is used to accommodate the battery unit 200.

[0100] According to another aspect of the present application, there is further provided a battery housing 100. The housing 100 is used to house a battery unit 200. As shown in Fig. 2, the housing 100 described above further includes the water-cooling system 130 described above in addition to the first part 110 and the second part 120, and a water-cooling plate assembly 300 in the water-cooling system 130 is attached to the battery unit 200 to cool the battery unit 200. Referring to Fig. 3, in some embodiments, the water-cooling plate assembly 300 may be provided as a part of the housing 100 and fixed inside the housing 100.

[0101] According to one embodiment of the present application, there is further provided a battery 10. The battery 10 includes a unitary battery 200 and the above-described housing 100. The housing 100 is used to house the unitary battery 200.

[0102] According to one aspect of the present application, there is further provided a battery 10. The battery 10 includes the above-described water-cooling system 130 and a plurality of battery units 200. At least some of the battery units 200 are provided in a gap between two adjacent water-cooled plate assemblies 300 of the water-cooling system 130. Two opposing sides of each battery unit 200 of the at least some of the battery units 200 are attached to the harmonica-shaped tube plates 370 of the two adjacent water-cooled plate assemblies 300, respectively, so that the two opposing sides of each battery unit 200 are cooled by the water-cooling system 130.

[0103] According to the battery of this embodiment, two adjacent water-cooled plate assemblies 300 of the water-cooling system 130 can respectively cool two opposing sides of each battery unit 200, thereby improving the cooling efficiency of the battery unit 200 and achieving a balanced cooling effect above and below the battery unit 200.

[0104] According to one aspect of the present application, there is further provided a power consumption device 1. A battery 10 is used to provide power to the power consumption device 1. The specific structure of the power consumption device 1 may be referred to the description of FIG. 1 and will not be further described here.

[0105] Finally, it should be noted that the above embodiments are merely for the purpose of illustrating the technical solutions of the present application, and are not intended to limit the same. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art will understand that the technical solutions described in the above embodiments may be modified, or some or all of the technical features may be equivalently substituted. Such modifications or substitutions do not deviate from the essence of the corresponding technical solutions and the scope of the technical solutions of the embodiments of the present application, and should be covered by the claims and the scope of the specification of the present application. In particular, as long as there is no structural contradiction, the technical features mentioned in the embodiments can be combined in any form. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions encompassed by the claims. [Explanation of symbols]

[0106] 1 vehicle 10 batteries 20 Controller 30 motor 100 cabinets 110 First Part 120 Second Part 130 Water Cooling System 200 battery only 300 Water cooling plate assembly 310 First Rectifier 320 Second Rectifier 330 First liquid inlet 340 First liquid outlet 350 Second liquid inlet 360 Second liquid outlet 370 Harmonica-shaped tube sheet 371 First cooling passage unit 372 Second Cooling Passage Unit 373 Third Cooling Passage Unit 311 First rectifier piece 312 Second rectifier piece 313 First Separator 313a First connection segment 313b First arc-shaped segment 313c Second connecting segment 313d First body part 311a First engagement groove 312b First engagement portion 311c First positioning hole 312c Second positioning hole 321 Third rectifier piece 322 Fourth Rectifier Piece 323 Second Separator 323a Third connecting segment 323b Second arc segment 323c Fourth connecting segment 323d Second body part 400 connecting pipe

Claims

1. a harmonica-shaped tube sheet having a plurality of cooling passages formed therein extending along a length direction, the plurality of cooling passages being arranged in parallel along a width direction of the harmonica-shaped tube sheet so that a coolant flows through the plurality of cooling passages; a first flow rectifier provided at a first end of the harmonica-shaped tube sheet in the length direction and having a first flow rectification space formed therein that is in communication with ports at one ends of the plurality of cooling passages, and having a first liquid inlet and a first liquid outlet formed on both sides in the thickness direction of the harmonica-shaped tube sheet, respectively, for allowing the cooling liquid to flow into and out of the first flow rectification space; a second flow rectifier provided at a second end of the harmonica-shaped tube sheet opposite the first end in the length direction, and having second flow rectification spaces formed therein that communicate with ports at the other ends of the plurality of cooling passages, and having second liquid inlets and second liquid outlets formed on both sides in the thickness direction of the harmonica-shaped tube sheet, respectively, for allowing the cooling liquid to flow into and out of the second flow rectification spaces, the first flow rectifier further includes a first flow rectifier piece and a second flow rectifier piece arranged in parallel in a thickness direction of the harmonica-shaped tube sheet, the first flow rectifier piece and the second flow rectifier piece respectively protruding in two opposite directions; the second flow rectifier further includes a third flow rectifier piece and a fourth flow rectifier piece arranged in parallel in a thickness direction of the harmonica-shaped tube sheet, the third flow rectifier piece and the fourth flow rectifier piece respectively protruding in two opposite directions; a water-cooled plate assembly in which at least a portion of the edges of the first and second flow rectifying pieces are joined together, with the first flow rectifying space being defined by the raised portions of both pieces, and at least a portion of the edges of the third and fourth flow rectifying pieces are joined together, with the second flow rectifying space being defined by the raised portions of both pieces.

2. the first liquid inlet and the first liquid outlet are provided in the first flow straightening piece and the second flow straightening piece, respectively; 2. The water-cooled plate assembly according to claim 1, wherein the second liquid inlet and the second liquid outlet are provided in the third and fourth flow straightening pieces, respectively.

3. projections of the first liquid inlet and the first liquid outlet on a reference plane overlap, the reference plane being a plane parallel to both side surfaces of the harmonica-shaped tube sheet in a thickness direction; The water-cooled plate assembly of claim 1 , wherein projections of the second liquid inlet and the second liquid outlet on the reference plane overlap.

4. At least a part of an edge of the first rectifying piece and at least a part of an edge of the second rectifying piece are joined by welding; The water-cooled plate assembly according to claim 1 , wherein at least a portion of an edge of the third flow rectifying piece and at least a portion of an edge of the fourth flow rectifying piece are joined by welding.

5. At least a portion of an edge of the first rectifying piece and at least a portion of an edge of the second rectifying piece are joined by engagement; The water-cooled plate assembly according to claim 1 , wherein at least a portion of an edge of the third flow straightening piece and at least a portion of an edge of the fourth flow straightening piece are joined by interlocking.

6. a plurality of first engagement grooves are further provided on an edge of the first rectifying piece, a plurality of first engagement portions are further provided at corresponding positions on an edge of the second rectifying piece, and the first engagement grooves are joined to the corresponding first engagement portions to realize joining by engagement between the first rectifying piece and the second rectifying piece; 6. The water-cooled plate assembly of claim 5, wherein a plurality of second engagement grooves are further provided on the edge of the third rectifying piece, and a plurality of second engagement portions are further provided at corresponding positions on the edge of the fourth rectifying piece, and the second engagement grooves are joined to the corresponding second engagement portions to achieve an engagement between the third rectifying piece and the fourth rectifying piece.

7. 2. The water-cooled plate assembly according to claim 1, wherein one or more of the first, second, third, and fourth flow rectifying pieces are further provided with positioning portions that are arranged to be used to align the water-cooled plate assembly with another water-cooled plate assembly during a process of installing the water-cooled plate assembly.

8. When the plurality of cooling passages include a plurality of cooling passage units arranged along the width direction of the harmonica-shaped tube sheet, the first flow straightener includes a first separator provided in the first flow straightening space, and the plurality of cooling passage units include a first cooling passage unit, a second cooling passage unit, and a third cooling passage unit arranged in order along the width direction of the harmonica-shaped tube sheet, the first separator is a first connection segment provided to extend along at least a portion of an edge of the first rectifying piece and the second rectifying piece and fixed to an inner side of the edge of the first rectifying piece and the second rectifying piece; a first arc-shaped segment extending along at least a portion of an edge of the first liquid inlet and the first liquid outlet so as to avoid the first liquid inlet and the first liquid outlet; 2. The water-cooled plate assembly of claim 1, further comprising: a second connection segment connected to an edge of the first end of the harmonica-shaped tube sheet and fixed between a port of the first cooling passage unit and a port of the second cooling passage unit.

9. When the plurality of cooling passages include a plurality of cooling passage units arranged along the width direction of the harmonica-shaped tube sheet, the second flow straightener includes a second separator provided in the second flow straightening space, and the plurality of cooling passage units include a first cooling passage unit, a second cooling passage unit, and a third cooling passage unit arranged in order along the width direction of the harmonica-shaped tube sheet, the second separator is a third connection segment provided to extend along at least a portion of an edge of the third rectifying piece and the fourth rectifying piece and fixed to an inner side of the edge of the third rectifying piece and the fourth rectifying piece; a second arc-shaped segment extending along at least a portion of an edge of the second liquid inlet and the second liquid outlet so as to avoid the second liquid inlet and the second liquid outlet; 2. The water-cooled plate assembly of claim 1, further comprising: a fourth connection segment connected to an edge of a second end of the harmonica-shaped tube sheet and fixed between a port of the third cooling passage unit and a port of the second cooling passage unit.

10. A water cooling system comprising a plurality of water-cooled plate assemblies according to any one of claims 1 to 9, The plurality of water-cooled plate assemblies are arranged in parallel at intervals, and for any two adjacent water-cooled plate assemblies among the plurality of water-cooled plate assemblies, a water-cooled plate assembly having a first liquid inlet and a second liquid outlet, the first liquid inlet and the second liquid outlet of the other water-cooled plate assembly being connected to the first liquid outlet and the second liquid inlet of the other water-cooled plate assembly, respectively, to realize a connection between the two adjacent water-cooled plate assemblies.

11. further comprising a plurality of connecting pipes, each of which is used to communicate between a first liquid inlet and a first liquid outlet of two adjacent water-cooled plate assemblies or between a second liquid inlet and a second liquid outlet of two adjacent water-cooled plate assemblies; 11. The water cooling system of claim 10, wherein a first liquid inlet, a second liquid inlet, a first liquid outlet, and a second liquid outlet of each water cooling plate assembly of the water cooling system are each formed with a flange that protrudes toward the outside of the water cooling plate assembly, and the flange is inserted into the corresponding connecting pipe to realize a connection between the first liquid inlet, the second liquid inlet, the first liquid outlet, or the second liquid outlet and the connecting pipe.

12. A battery case for housing a single battery A battery housing comprising the water-cooled plate assembly according to any one of claims 1 to 9, wherein the water-cooled plate assembly is in close contact with the battery unit to cool the battery unit.

13. The battery alone and A battery comprising: a battery casing for accommodating the battery unit according to claim 12.

14. The water cooling system of claim 10; a plurality of battery units, at least some of which are provided in a gap between two adjacent water-cooled plate assemblies of the water-cooling system; two opposing sides of each of the at least some of the battery units are in close contact with the harmonica-shaped tube plates of the two adjacent water-cooled plate assemblies, respectively, so that the two opposing sides of each of the battery units are cooled by the water-cooling system.

15. A power consuming device according to claim 13, comprising a battery for providing power to said power consuming device.

16. 15. A power consuming device comprising a battery for providing power to said power consuming device according to claim 14.

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