CN219015030U - Heat exchange assembly, box, battery and power utilization device - Google Patents

Abstract

The application provides a heat exchange assembly, a box, a battery and an electric device. The heat exchange assembly comprises a heat exchange member and a fluid reversing member, wherein the heat exchange member is provided with a first flow passage, a second flow passage and a third flow passage; the fluid reversing piece is arranged at two ends of the heat exchange piece along the first direction and comprises a fluid inlet and outlet, a first flow port, a second flow port, a third flow port, a first reversing flow passage and a second reversing flow passage, wherein the first reversing flow passage is communicated with the fluid inlet and outlet and the first flow port, and the second reversing flow passage is communicated with the second flow port and the third flow port; the first flow passage communicates with the first flow port and the third flow port, the second flow passage communicates with the second flow port, and the third flow passage communicates with the third flow port and the first flow port, so that the first flow passage, the second flow passage, and the third flow passage communicate in series. The heat exchange component is favorable for improving the uniformity of heating or cooling of the heat exchange component to the battery monomer, and further improves the reliability of the battery monomer.

Description

Heat exchange assembly, box, battery and power utilization device

Technical Field

The present application relates to the field of battery technology, and more particularly, to a heat exchange assembly, a case, a battery, and an electrical device.

Background

Batteries are widely used in electronic devices such as cellular phones, notebook computers, battery cars, electric vehicles, electric airplanes, electric ships, electric toy vehicles, electric toy ships, electric toy airplanes, electric tools, and the like. The battery cells may include cadmium-nickel battery cells, hydrogen-nickel battery cells, lithium ion battery cells, secondary alkaline zinc-manganese battery cells, and the like.

In addition to improving the service performance of a battery, how to improve the reliability of a battery is a non-negligible problem in the development of battery technology. Therefore, how to improve the reliability of the battery is a technical problem of continuous improvement in battery technology.

Disclosure of Invention

The embodiment of the application provides a heat exchange assembly, a box, a battery and an electric device, and can improve the reliability of the battery.

In a first aspect, embodiments of the present application provide a heat exchange assembly including a heat exchange member having a first flow passage, a second flow passage, and a third flow passage extending in a first direction and configured to circulate a fluid; the fluid reversing piece is arranged at two ends of the heat exchange piece along the first direction and comprises a fluid inlet and outlet, a first flow port, a second flow port, a third flow port, a first reversing flow passage and a second reversing flow passage, wherein the first reversing flow passage is communicated with the fluid inlet and outlet and the first flow port, and the second reversing flow passage is communicated with the second flow port and the third flow port; the two ends of the first flow channel are respectively communicated with the first flow port and the third flow port, the two ends of the second flow channel are respectively communicated with the second flow port, and the two ends of the third flow channel are respectively communicated with the third flow port and the first flow port, so that the first flow channel, the second flow channel and the third flow channel are serially communicated.

According to the heat exchange assembly, the fluid reversing pieces are arranged at the two ends of the heat exchange piece along the first direction, so that the first flow channel, the second flow channel and the third flow channel of the heat exchange piece are connected in series through the fluid reversing pieces at the two ends, fluid in the fluid heat exchange piece sequentially flows into the first flow channel, the second flow channel and the third flow channel, the uniformity of the fluid flowing in the first flow channel, the second flow channel and the third flow channel is improved, and the use amount of the fluid is saved. When the heat exchange component is applied to the battery, the uniformity of heating or cooling of the heat exchange component to the battery monomer is improved, the uniformity of the temperature of the battery monomer is improved, the risk of thermal runaway of the battery monomer is reduced, and the reliability of the battery monomer is improved.

In some embodiments, the bottom wall of the first diverting flow channel is higher than the bottom wall of the second diverting flow channel in the direction of gravity. Therefore, the smoothness of the fluid flowing in the fluid reversing piece is improved, and the heat exchange efficiency of the heat exchange component and the battery cell is further improved.

In some embodiments, the first flow channel, the second flow channel, and the third flow channel are juxtaposed along a second direction that intersects the first direction, the second flow channel being located between the first flow channel and the third flow channel. The arrangement of the second flow channel is positioned between the first flow channel and the third flow channel while improving the heat exchange efficiency of the heat exchange piece and the battery cell, thereby being beneficial to simplifying the flow path of fluid in the fluid reversing piece and further being beneficial to simplifying the structure of the fluid reversing piece.

In some embodiments, the fluid diverter comprises: a housing having a fluid inlet and a fluid outlet; the first separating piece is arranged in the shell and is used for separating the first reversing flow passage and the second reversing flow passage, and the first flow port and the second flow port are positioned on two sides of the first separating piece; the second separator is connected to the shell, and the second flow port and the third flow port are respectively positioned on two sides of the second separator. The arrangement is convenient for realizing mutual isolation of the first reversing flow channel and the second reversing flow channel, and is convenient for realizing mutual separation of the first flow port, the second flow port and the third flow port, so that the structure of the fluid reversing piece is facilitated to be simplified while serial connection of the first flow channel, the second flow channel and the third flow channel is realized.

In some embodiments, the housing, the first divider, and the second divider are integrally formed. The manufacturing process of the fluid reversing piece is facilitated to be simplified, the structural strength of the fluid reversing piece and the tightness of the first reversing flow passage and the second reversing flow passage are facilitated to be improved, and the risk of fluid leakage of the fluid reversing piece is reduced.

In some embodiments, an end of the first partition facing the heat exchange member has a first clamping portion, and the first clamping portion is in clamping connection with the heat exchange member. The connection strength of the fluid reversing piece and the heat exchange piece is improved, and the connection convenience of the fluid reversing piece and the heat exchange piece is improved.

In some embodiments, the heat exchange member has at least one alternative channel, the at least one alternative channel being located between the first flow channel and the second flow channel; the first clamping part is provided with a first convex part, and at least part of the first convex part is arranged in the alternative channel so as to prevent fluid from flowing through the alternative channel. So configured, the specific location of fluid flow through the heat exchange member may be selected to exchange heat with the corresponding battery cell. The alternative channel can be used for positioning the fluid reversing piece, so that the connection strength of the fluid reversing piece and the heat exchange piece is improved, meanwhile, the control fluid cannot pass through the alternative channel between the first flow channel and the second flow channel, the heat exchange efficiency of the heat exchange piece and the battery monomer is further improved, and the utilization rate of the fluid is improved.

In some embodiments, a side of the second partition facing the heat exchange member has a second clamping portion, and the second clamping portion is in clamping connection with the heat exchange member. The connection strength of the fluid reversing piece and the heat exchange piece is further improved, and the connection convenience of the fluid reversing piece and the heat exchange piece is improved.

In some embodiments, the heat exchange element has at least one alternative channel, the at least one alternative channel being located between the second flow channel and the third flow channel; the second clamping part is provided with a second convex part, and at least part of the second convex part is arranged in the alternative channel so as to prevent fluid from flowing through the alternative channel. So configured, the specific location of fluid flow through the heat exchange member may be selected to exchange heat with the corresponding battery cell. The alternative channel can be used for positioning the fluid reversing piece, so that the connection strength of the fluid reversing piece and the heat exchange piece is improved, meanwhile, the control fluid cannot pass through the alternative channel between the second flow channel and the third flow channel, the heat exchange efficiency of the heat exchange piece and the battery monomer is further improved, and the utilization rate of the fluid is improved.

In some embodiments, the bottom wall of the second reversing flow channel includes a first sub-wall, a second sub-wall, and a connecting sub-wall, the first sub-wall being located on a side of the second reversing flow channel adjacent to the second flow port, the second sub-wall being located on a side of the second flow channel adjacent to the third flow port, the connecting sub-wall connecting the first sub-wall and the second sub-wall; the first sub-wall is higher than the second sub-wall in the direction of gravity. After flowing into the second reversing flow passage from the second flow passage, the fluid flows through the first sub-wall, passes through the steps of the first sub-wall and the second sub-wall, and naturally flows to the second sub-wall. Therefore, the smoothness of fluid flowing in the second reversing flow passage is improved, and the smoothness of fluid flowing in the heat exchange assembly is improved, so that the heat exchange efficiency of the heat exchange assembly and the battery cells is improved.

In a second aspect, embodiments of the present application provide a tank comprising a heat exchange assembly as in the embodiments of the first aspect.

According to the case provided in the embodiments of the present application, the heat exchange assembly provided in any one of the embodiments is adopted, so that the case has the same technical effects, and will not be described herein again.

In a third aspect, embodiments of the present application provide a battery comprising the case and the battery cell of the embodiments of the second aspect; the battery cell is accommodated in the box body, and the heat exchange piece is contacted with the battery cell and is used for exchanging heat with the battery cell.

According to the battery provided by the embodiment of the application, the case provided by the embodiment has the same technical effects, and is not described herein.

In a fourth aspect, embodiments of the present application provide an electrical device comprising a battery as in the embodiments of the third aspect, the battery being configured to provide electrical energy.

According to the power utilization device provided by the embodiment of the application, the battery provided by the embodiment of the application is adopted, so that the same technical effects are achieved, and the details are not repeated here.

Drawings

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

FIG. 1 is a schematic view of a vehicle according to an embodiment of the present disclosure;

FIG. 2 is an exploded view of a battery according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a battery module in a battery according to an embodiment of the present disclosure;

fig. 4 is an exploded view of a battery cell in a battery according to some embodiments of the present disclosure;

FIG. 5 is a schematic view of a heat exchange assembly according to an embodiment of the present disclosure;

FIG. 6 is a front view of a heat exchange assembly provided in an embodiment of the present application;

FIG. 7 is a schematic cross-sectional view of FIG. 6 taken along line A-A;

FIG. 8 is a front view of a heat exchange member in a heat exchange assembly provided in an embodiment of the present application;

fig. 9 is a schematic structural view of a fluid reversing element in a heat exchange assembly according to an embodiment of the present disclosure;

fig. 10 is a schematic cross-sectional view of a fluid diverter in a heat exchange assembly according to an embodiment of the present application.

In the drawings, the drawings are not drawn to scale.

Reference numerals illustrate:

1. a vehicle; 1a, a motor; 1b, a controller;

10. a battery; 11. a case; 111. a first box portion; 112. a second box portion;

20. a battery module;

30. a battery cell; 31. a housing; 31a, a receiving cavity; 311. a housing body; 311a, openings; 312. an end cap; 32. an electrode assembly;

40. a heat exchange assembly; 41. a heat exchange member; 41a, a first flow passage; 41b, a second flow passage; 41c, a third flow passage; 41d, alternative channels; 42. a fluid reversing element; 42a, fluid inlet and outlet; 42b, a first flow port; 42c, a second flow port; 42d, third flow port; 42e, a first reversing flow channel; 42f, a second reversing flow passage; 421. a housing; 422. a first partition; 4221. a first clamping part; 4221a, a first protrusion; 423. a second separator; 4231. a second clamping part; 4231a, a second protrusion; x, a first direction; y, second direction.

Detailed Description

Embodiments of the present application are described in further detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the present application and are not intended to limit the scope of the application, i.e., the application is not limited to the embodiments described.

In the description of the present application, it is to be noted that, unless otherwise indicated, the meaning of "plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like indicate an orientation or positional relationship merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The "vertical" is not strictly vertical but is within the allowable error range. "parallel" is not strictly parallel but is within the tolerance of the error.

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

In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms in the present application can be understood as appropriate by one of ordinary skill in the art.

In the present application, the battery cells may include lithium ion secondary battery cells, lithium ion primary battery cells, lithium sulfur battery cells, sodium lithium ion battery cells, sodium ion battery cells, or magnesium ion battery cells, and the embodiment of the present application is not limited thereto. The battery cells may be cylindrical, flat, rectangular, or otherwise shaped, as well as the embodiments herein are not limited in this regard. The battery cells are generally classified into three types according to the packaging method: the cylindrical battery cell, the square battery cell and the soft pack battery cell are not limited thereto.

Reference to a battery in embodiments of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present application may include a battery module or a battery pack, or the like. The battery generally includes a case for enclosing one or more battery cells. The case body can prevent liquid or other foreign matters from affecting the charge or discharge of the battery cells.

The battery cell comprises an electrode assembly and electrolyte, wherein the electrode assembly comprises a positive electrode plate, a negative electrode plate and a separator. The battery cell mainly relies on metal ions to move between the positive pole piece and the negative pole piece to work. The positive electrode plate comprises a positive electrode current collector and a positive electrode active material layer, and the positive electrode active material layer is coated on the surface of the positive electrode current collector; the positive current collector comprises a positive current collecting part and a positive protruding part protruding out of the positive current collecting part, the positive current collecting part is coated with a positive active material layer, at least part of the positive protruding part is not coated with the positive active material layer, and the positive protruding part is used as a positive lug. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, the positive electrode active material layer includes a positive electrode active material, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate or the like. The negative electrode plate comprises a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector; the negative current collector comprises a negative current collecting part and a negative convex part protruding out of the negative current collecting part, wherein the negative current collecting part is coated with a negative active material layer, at least part of the negative convex part is not coated with the negative active material layer, and the negative convex part is used as a negative tab. The material of the anode current collector may be copper, the anode active material layer includes an anode active material, and the anode active material may be carbon or silicon, or the like. In order to ensure that the high current is passed without fusing, the number of positive electrode lugs is multiple and stacked together, and the number of negative electrode lugs is multiple and stacked together. The separator may be made of PP (polypropylene) or PE (polyethylene) or the like. In addition, the electrode assembly may be a wound structure or a lamination structure, and the embodiment of the present application is not limited thereto.

The inventor finds that after the problem that the local temperature is too high in the working process of the battery, the structure and the working process of the battery are subjected to systematic analysis and research, and as a result, the heat exchange component in the battery is provided with a plurality of circulating channels which are arranged in parallel, cooling medium flows into the plurality of circulating channels at random after flowing into the heat exchange component, the cooling medium in each circulating channel is unevenly distributed, so that the flow rate of the cooling medium in part of the circulating channels is lower, and the flow rate of the cooling medium in part of the circulating channels is higher, therefore, the cooling effect of the heat exchange component on battery monomers at different positions is not uniform, the local temperature of the battery monomers is too high, and as the working time of the battery monomers is increased, the local temperature rise of the battery monomers is increased, the local thermal runaway of the battery monomers is easily caused, and the reliability of the battery is seriously affected.

Based on the above-mentioned problems found by the inventors, the inventors have improved the structure of the heat exchange assembly, and the technical solutions described in the embodiments of the present application are applicable to the heat exchange assembly, the case including the heat exchange assembly, the battery employing the case, and the power using device using the battery.

The heat exchange assembly provided according to the embodiment of the application comprises a heat exchange member and a fluid reversing member. The heat exchange member has a first flow passage, a second flow passage, and a third flow passage extending in a first direction and for circulating a fluid. The fluid reversing piece is arranged at two ends of the heat exchange piece along the first direction and comprises a fluid inlet and outlet, a first flow port, a second flow port, a third flow port, a first reversing flow passage and a second reversing flow passage, wherein the first reversing flow passage is communicated with the fluid inlet and outlet and the first flow port, and the second reversing flow passage is communicated with the second flow port and the third flow port. The two ends of the first flow channel are respectively communicated with the first flow port and the third flow port, the two ends of the second flow channel are respectively communicated with the second flow port, and the two ends of the third flow channel are respectively communicated with the third flow port and the first flow port, so that the first flow channel, the second flow channel and the third flow channel are serially communicated.

According to the heat exchange assembly provided by the embodiment of the application, the fluid reversing piece is arranged at the two ends of the heat exchange piece along the first direction, the series connection of the first flow channel, the second flow channel and the third flow channel in the heat exchange piece is realized through the fluid reversing piece, the uniformity of the fluid flowing in the first flow channel, the second flow channel and the third flow channel is improved, the uniformity of the temperature of the battery monomer is further improved, the risk of thermal runaway caused by overhigh local temperature rise of the battery monomer is reduced, and the reliability of the battery monomer is improved.

The electric device may be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, or the like. The vehicle can be a fuel oil vehicle, a fuel gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle; spacecraft including airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete shakers, and electric planers, among others. The embodiment of the application does not limit the electric device in particular.

For convenience of explanation, the following examples will be described taking an electric device as an example of a vehicle.

As shown in fig. 1, a battery 10 is provided inside a vehicle 1. The battery 10 may be provided at the bottom or the head or the tail of the vehicle 1. The battery 10 may be used for power supply of the vehicle 1, for example, the battery 10 may serve as an operating power source of the vehicle 1.

The vehicle 1 may further include a controller 1b and a motor 1a. The controller 1b is used to control the battery 10 to supply power to the motor 1a, for example, for operating power requirements at start-up, navigation and travel of the vehicle 1.

In some embodiments of the present application, the battery 10 may not only serve as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, providing driving power for the vehicle 1 instead of or in part instead of fuel oil or natural gas.

Referring to fig. 2, the battery 10 includes a battery cell (not shown in fig. 2). The battery 10 may further include a case 11 for accommodating the battery cells.

The case 11 is used to accommodate the battery cells, and the case 11 may have various structural forms. In some embodiments, the housing 11 may include a first housing portion 111 and a second housing portion 112. The first case 111 and the second case 112 are mutually covered. The first and second case parts 111 and 112 together define an accommodating space for accommodating the battery cells. The second case 112 may have a hollow structure with one end opened, the first case 111 has a plate-like structure, and the first case 111 is covered on the opening side of the second case 112 to form the case 11 having an accommodation space; the first case portion 111 and the second case portion 112 may each have a hollow structure with one side opened. The opening side of the first case portion 111 is engaged with the opening side of the second case portion 112 to form a case having an accommodation space. Of course, the first and second case parts 111 and 112 may be various shapes, such as a cylinder, a rectangular parallelepiped, and the like.

In order to improve the sealability after the first and second case parts 111 and 112 are connected, a sealing member, such as a sealant, a gasket, or the like, may be further disposed between the first and second case parts 111 and 112.

Assuming that the first housing portion 111 is covered with the second housing portion 112, the first housing portion 111 may also be referred to as an upper case cover, and the second housing portion 112 may also be referred to as a lower case.

In the battery 10, the number of battery cells may be one or more. If the number of the battery cells is multiple, the battery cells can be connected in series, in parallel or in series-parallel. The series-parallel connection refers to that a plurality of battery monomers are connected in series or in parallel. The plurality of battery cells can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery cells is accommodated in the box body, or the plurality of battery cells can be connected in series or in parallel or in series-parallel to form the battery module 20. The plurality of battery modules 20 are then connected in series or parallel or a series-parallel combination to form a unit and are accommodated in the case 11.

In some embodiments, as shown in fig. 3, fig. 3 is a schematic structural view of the battery module 20 shown in fig. 2. In the battery module 20, the battery cells 30 are plural. The plurality of battery cells 30 are first connected in series or parallel or a series-parallel combination to form the battery module 20. The plurality of battery modules 20 are then connected in series or parallel or a series-parallel combination to form a unit and are accommodated in the case 11.

In some embodiments, electrical connection between the plurality of battery cells 30 in the battery module 20 may be achieved through a bus bar component to achieve parallel or serial or parallel-serial connection of the plurality of battery cells 30 in the battery module 20.

Referring to fig. 4, fig. 4 is an exploded view of the battery cell 30 shown in fig. 3. The battery cell 30 provided in the embodiment of the application includes an electrode assembly 32 and a housing 31, the housing 31 has a receiving cavity, and the electrode assembly 32 is received in the receiving cavity.

In some embodiments, the case 31 may include a case body 311 and an end cap 312, the case body 311 being a hollow structure having one side opened, the end cap 312 being capped at the opening 311a of the case body 311 and forming a sealing connection to form a sealed space for accommodating the electrode assembly 32 and the electrolyte.

In assembling the battery cell 30, the electrode assembly 32 may be first placed into the case body 311, then the end cap 312 is covered on the opening of the case body 311, and then the electrolyte is injected into the case body 311 through the electrolyte injection port on the end cap 312.

In some embodiments, the housing 31 may also be used to contain an electrolyte, such as an electrolyte solution. The housing 31 may take a variety of structural forms.

The case body 311 may be of various shapes, such as a cylinder, a rectangular parallelepiped, etc. The shape of the case body 311 may be determined according to the specific shape of the electrode assembly 32. For example, if the electrode assembly 32 has a cylindrical structure, the case body 311 may alternatively have a cylindrical structure. If the electrode assembly 32 has a rectangular parallelepiped structure, the case body 311 may have a rectangular parallelepiped structure. In fig. 4, exemplarily, the case body 311 and the electrode assembly 32 are both of a rectangular parallelepiped structure.

The material of the shell body 311 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc., which is not particularly limited in the embodiment of the present application.

The electrode assembly 32 accommodated in the case body 311 may be one or more. In fig. 4, the number of electrode assemblies 32 accommodated in the case body 311 is two.

As shown in fig. 5, 6 and 7, the heat exchange assembly 40 provided according to the embodiment of the present application includes a heat exchange member 41 and a fluid reversing member 42. The heat exchange member 41 has a first flow passage 41a, a second flow passage 41b, and a third flow passage 41c extending in the first direction X for circulating a fluid. The fluid reversing member 42 is disposed at two ends of the heat exchange member 41 along the first direction X, the fluid reversing member 42 includes a fluid inlet and outlet 42a, a first flow port 42b, a second flow port 42c, a third flow port 42d, a first reversing flow passage 42e and a second reversing flow passage 42f, the first reversing flow passage 42e communicates with the fluid inlet and outlet 42a and the first flow port 42b, and the second reversing flow passage 42f communicates with the second flow port 42c and the third flow port 42d. The first flow channel 41a has both ends respectively communicating with the first flow port 42b and the third flow port 42d, the second flow channel 41b has both ends respectively communicating with the second flow port 42c, and the third flow channel 41c has both ends respectively communicating with the third flow port 42d and the first flow port 42b, so that the first flow channel 41a, the second flow channel 41b, and the third flow channel 41c are serially communicated.

When the heat exchange assembly 40 is applied to the battery 10, according to the environmental requirement of the battery 10, the heat exchange assembly 40 may be configured to pass high-temperature fluid to heat the battery cells 30, or the heat exchange assembly 40 may be configured to pass low-temperature fluid to cool the battery cells 30.

Alternatively, the fluid flowing in the first flow passage 41a, the second flow passage 41b, and the third flow passage 41c may be a flowing medium capable of heat exchange such as a gas or a liquid.

Alternatively, the number of the first flow passages 41a, the second flow passages 41b, and the third flow passages 41c of the heat exchange member 41 may be one, respectively, or the heat exchange member 41 may be provided with a plurality of the first flow passages 41a, or with a plurality of the second flow passages 41b, or with a plurality of the third flow passages 41c. The plurality of first flow passages 41a may be arranged in parallel so that the fluid flows into the plurality of first flow passages 41a at the same time, and the plurality of second flow passages 41b may be arranged in parallel, or the plurality of third flow passages 41c may be arranged in parallel.

The number of the fluid direction changing members 42 may be two, and the two fluid direction changing members 42 are respectively disposed at both ends of the heat exchanging member 41 in the first direction X. The two fluid direction-changing members 42 disposed at the two ends of the heat exchange member 41 may be completely identical in structure or mirror-image to each other, or of course, the two fluid direction-changing members 42 may be disposed in a central symmetry with each other, which may be specifically selected according to practical requirements.

The fluid direction change members 42 at both ends of the heat exchange member 41 each have a fluid inlet and outlet 42a, and the fluid inlet and outlet 42a of one of the fluid direction change members 42 may serve as an inlet port for fluid and the fluid inlet and outlet 42a of the other fluid direction change member 42 may serve as an outlet port for fluid during heat exchange of the battery cells.

Two ends of the first flow channel 41a are respectively communicated with the first flow port 42b and the third flow port 42d, two ends of the third flow channel 41c are respectively communicated with the third flow port 42d and the first flow port 42b, then the first flow port 42b of one of the two fluid direction changing pieces 42 positioned at two ends of the heat exchange piece 41 is communicated with the first flow channel 41a, the third flow port 42d is communicated with the third flow channel 41c, and the first flow port 42b of the other fluid direction changing piece 42 is communicated with the third flow channel 41c, the third flow port 42d is communicated with the first flow channel 41a.

Since the first reversing flow path 42e flows through the fluid inlet and outlet 42a and the first flow path 42b, after flowing into the fluid reversing element 42 from one fluid inlet and outlet 42a, the fluid flows through the first reversing flow path 42e to the first flow path 42b, flows through the first flow path 42b to the first flow path 41a or the third flow path 41c communicated with the fluid reversing element, flows through the third flow path 42d of the fluid reversing element 42 at the other end of the heat exchange element 41 to the second flow path 41b, flows through the second flow path 42c of the fluid reversing element 42 at the beginning, flows through the third flow path 42d to the third flow path 41c or the first flow path 41a, flows through the first flow path 42b of the fluid reversing element 42 at the other end to the first flow path 41a, and flows out through the fluid inlet and outlet 42 a. Thus, heat exchange between the fluid and the battery cell is completed. Fig. 7 shows the flow direction of the fluid in the heat exchange assembly, in fact, the fluid may also flow in the heat exchange assembly in a reverse direction with respect to the flow direction in fig. 7.

The first reversing flow passages 42e of the two fluid reversing members 42 provided at both ends of the heat exchange member 41 in the first direction X may have the same structure or different shape, and the second reversing flow passages 42f of the two fluid reversing members 42 may have the same structure or different shape, or the first flow openings 42b, the second flow openings 42c, and the third flow openings 42d of the two fluid reversing members 42 may have the same shape or different shape, and may be provided according to actual requirements.

According to the heat exchange assembly 40 provided by the embodiment of the application, the fluid reversing pieces 42 are arranged at the two ends of the heat exchange piece 41 along the first direction X, so that the first flow channel 41a, the second flow channel 41b and the third flow channel 41c of the heat exchange piece 41 are connected in series through the fluid reversing pieces 42 at the two ends, so that fluid in the fluid heat exchange piece 41 flows into the first flow channel 41a, the second flow channel 41b and the third flow channel 41c in sequence, the uniformity of the fluid flowing in the first flow channel 41a, the second flow channel 41b and the third flow channel 41c is improved, and the use amount of the fluid is saved. When the heat exchange assembly 40 is applied to the battery 10, the uniformity of heating or cooling of the battery cell 30 by the heat exchange assembly 40 is improved, the uniformity of the temperature of the battery cell 30 is improved, the risk of thermal runaway of the battery cell 30 is reduced, and the reliability of the battery cell 30 is improved.

In some embodiments, the bottom wall of the first diverting flow channel 42e is higher than the bottom wall of the second diverting flow channel 42f along the direction of gravity.

In this way, after the fluid flows through the first reversing flow channel 42e, when the fluid flows through the second flow channel 41b of the heat exchange member 41 to the second reversing flow channel 42f, the fluid can automatically flow to the second reversing flow channel 42f under the action of gravity by utilizing the height difference between the bottom walls of the first reversing flow channel 42e and the second reversing flow channel 42f, which is beneficial to improving the smoothness of the fluid flowing in the fluid reversing member 42 and further improving the heat exchange efficiency of the heat exchange assembly 40 and the battery cell 30.

The first flow channel 41a, the second flow channel 41b, and the third flow channel 41c all extend along the first direction X, and the three may be arranged in parallel in a uniform direction, or the three may be arranged in parallel in different directions.

As shown in fig. 7 and 8, in some embodiments, the first flow channel 41a, the second flow channel 41b, and the third flow channel 41c are juxtaposed along a second direction Y that intersects the first direction X, the second flow channel 41b being located between the first flow channel 41a and the third flow channel 41 c.

The first flow channel 41a, the second flow channel 41b and the third flow channel 41c are arranged in parallel along the second direction Y, which is beneficial to improving the contact area between the first flow channel 41a, the second flow channel 41b and the third flow channel 41c in the fluid reversing element 42 and the battery cell 30, and further improving the heat exchange efficiency of the heat exchange element 41 and the battery cell 30. Depending on the order of fluid flow in the first, second and third flow channels 41a, 41b and 41c, fluid will first flow through the first or third flow channel 41a, 41c, then through the second flow channel 41b, and finally out through the third or first flow channel 41c, 41 a. That is, the second flow channel 41b is located between the first flow channel 41a and the third flow channel 41c, and the second flow channel 41b is located between the first flow channel 41a and the third flow channel 41c, which is beneficial to simplifying the flow path of the fluid in the fluid direction-changing member 42, and is beneficial to simplifying the structure of the fluid direction-changing member 42.

As shown in fig. 7, 9, and 10, in some embodiments, the fluid diverter 42 includes a housing 421, a first divider 422, and a second divider 423. The housing 421 has a fluid inlet and outlet 42a, a first partition 422 is disposed in the housing 421 and is used to partition the first reversing flow path 42e and the second reversing flow path 42f, and a first flow port 42b and a second flow port 42c are located at two sides of the first partition 422. The second partition 423 is connected to the case 421, and the second and third flow ports 42c and 42d are located at both sides of the second partition 423, respectively.

Alternatively, the case 421, the first partition 422, and the second partition 423 may be assembled together after being separately processed, or the case 421, the first partition 422, and the second partition 423 may be integrally formed, and the case 421, the first partition 422, and the second partition 423 may be integrally formed by injection molding, for example.

The first separator 422 serves to separate the first and second diverting flow passages 42e and 42f from each other. Meanwhile, the first partition 422 may also separate the first and second flow ports 42b and 42c from each other. The second partition 423 may separate the second flow port 42c of the second flow passage 41b from the third flow port 42 d.

The first, second and third flow ports 42b, 42c and 42d may be disposed at intervals in the second direction Y so as to communicate with the first, second and third flow passages 41a, 41b and 41 c.

Accordingly, providing the fluid direction change member 42 including the case 421, the first partition 422, and the second partition 423 facilitates achieving mutual insulation of the first direction change flow path 42e and the second direction change flow path 42f, and facilitates achieving mutual separation of the first flow passage port 42b, the second flow passage port 42c, and the third flow passage port 42d, facilitating achieving series connection of the first flow path 41a, the second flow path 41b, and the third flow path 41c while facilitating simplifying the structure of the fluid direction change member 42.

In some embodiments, the housing 421, the first partition 422, and the second partition 423 are integrally provided.

Illustratively, the case 421, the first partition 422, and the second partition 423 are integrally formed by an injection molding process.

The housing 421, the first partition 422 and the second partition 423 are integrally formed, which is beneficial to simplifying the preparation process of the fluid reversing element 42, improving the structural strength of the fluid reversing element 42 and the tightness of the first reversing flow passage 42e and the second reversing flow passage 42f, and reducing the risk of fluid leakage of the fluid reversing element 42.

With continued reference to fig. 7, 9 and 10, in some embodiments, an end of the first partition 422 facing the heat exchange member 41 has a first clamping portion 4221, and the first clamping portion 4221 is in clamping connection with the heat exchange member 41.

Alternatively, one of the first clamping portion 4221 and the heat exchange member 41 may be provided with a protrusion, and the other one with a recess, and the mutual clamping connection of the first clamping portion 4221 and the heat exchange member 41 may be achieved by the cooperation of the protrusion and the recess. Of course, one of the first locking portion 4221 and the heat exchange member 41 may have a claw, the other may have a groove for engaging with the claw, and the locking connection between the first locking portion 4221 and the heat exchange member 41 may be achieved by engaging the claw with the groove.

It can be appreciated that the end of the first partition 422 facing the heat exchange member 41 is provided with the first clamping portion 4221, and the first clamping portion 4221 is in clamping connection with the heat exchange member 41, which is beneficial to improving the connection strength of the fluid reversing member 42 and the heat exchange member 41 and improving the connection convenience of the fluid reversing member 42 and the heat exchange member 41.

With continued reference to fig. 7, 9 and 10, in some embodiments, the heat exchange member 41 has at least one alternative channel 41d, the at least one alternative channel 41d being located between the first and second flow channels 41a, 41 b; the first engagement portion 4221 has a first protrusion 4221a, at least a portion of the first protrusion 4221a being disposed within the alternative channel 41d to prevent fluid flow through the alternative channel 41d.

Alternatively, the number of alternative channels 41d between the first and second flow channels 41a, 41b may be one or more. The number of first protrusions 4221a of the first engagement portion 4221 may correspond to the number of alternative channels 41d between the first and second channels 41a, 41b such that each first protrusion 4221a engages with an alternative channel 41 d.

In this way, after the heat exchange member 41 is manufactured, in the process of being connected to the fluid reversing member 42, a portion of the alternative channel 41d may be selectively used as the first channel 41a, the second channel 41b or the third channel 41c according to the relative position of the heat exchange member 41 and the battery cell 30, so as to select a specific position where the fluid flows through the heat exchange member 41, and further perform heat exchange on the corresponding battery cell 30. The alternative channel 41d which is not communicated with the fluid reversing member 42 and is positioned between the first channel 41a and the second channel 41b is arranged to be clamped with the first convex part 4221a of the first clamping part 4221, and the alternative channel 41d is used for providing a certain positioning effect on the fluid reversing member 42, so that the connection strength of the fluid reversing member 42 and the heat exchange member 41 is improved, meanwhile, the control fluid does not pass through the alternative channel 41d between the first channel 41a and the second channel 41b, the heat exchange efficiency of the heat exchange member 41 and the battery cell 30 is further improved, and the utilization rate of the fluid is improved.

With continued reference to fig. 7, 9 and 10, in some embodiments, a side of the second partition 423 facing the heat exchange member 41 has a second clamping portion 4231, and the second clamping portion 4231 is in clamping connection with the heat exchange member 41.

Alternatively, one of the second clamping portion 4231 and the heat exchange member 41 may be provided with a protrusion, and the other one with a recess, and the mutual clamping connection of the first clamping portion 4221 and the heat exchange member 41 is achieved by the cooperation of the protrusion and the recess. Of course, one of the second locking portion 4231 and the heat exchange member 41 may have a claw, the other may have a locking groove for mating with the claw, and the locking connection between the first locking portion 4221 and the heat exchange member 41 may be achieved by mating between the claw and the locking groove.

It can be appreciated that the second partition 423 is provided with the second clamping portion 4231 on the side facing the heat exchange member 41, and the second clamping portion 4231 is in clamping connection with the heat exchange member 41, which is beneficial to further improving the connection strength between the fluid reversing member 42 and the heat exchange member 41 and improving the connection convenience between the fluid reversing member 42 and the heat exchange member 41.

With continued reference to fig. 7, 9 and 10, in some embodiments, the heat exchange element 41 has at least one alternative channel 41d, the at least one alternative channel 41d being located between the second flow channel 41b and the third flow channel 41 c; the second engagement portion 4231 has a second protrusion 4231a, at least a portion of the second protrusion 4231a being disposed within the alternative channel 41d to prevent fluid flow through the alternative channel 41d.

Alternatively, the number of circulation flows between the second flow passage 41b and the third flow passage 41c may be one or more, and correspondingly, the number of second protrusions 4231a of the second snap-fit portion 4231 may be one-to-one corresponding to the number of alternative passages 41d between the second flow passage 41b and the third flow passage 41c, so that each second protrusion 4231a is snapped into the alternative passage 41 d.

In this way, after the heat exchange member 41 is manufactured, in the process of being connected to the fluid reversing member 42, a portion of the alternative channel 41d may be selectively used as the first flow channel 41a, the second flow channel 41b or the third flow channel 41c according to the relative position of the heat exchange member 41 and the battery cell 30, so as to select a specific position where the fluid flows through the heat exchange member 41, and further perform heat exchange on the corresponding battery cell 30. The alternative channel 41d which is not communicated with the fluid reversing member 42 and is positioned between the second flow channel 41b and the third flow channel 41c is arranged to be clamped with the second convex part 4231a of the second clamping part 4231, and the alternative channel 41d is utilized to provide a certain positioning effect on the fluid reversing member 42, so that the connection strength of the fluid reversing member 42 and the heat exchange member 41 is improved, meanwhile, the control fluid does not pass through the alternative channel 41d between the second flow channel 41b and the third flow channel 41c, the heat exchange efficiency of the heat exchange member 41 and the battery cell 30 is further improved, and the utilization rate of the fluid is improved.

In some embodiments, the bottom wall of the second reversing flow channel 42f includes a first sub-wall, a second sub-wall, and a connecting sub-wall, the first sub-wall being located on a side of the second reversing flow channel 42f adjacent to the second flow port 42c, the second sub-wall being located on a side of the second flow channel 41b adjacent to the third flow port 42d, the connecting sub-wall connecting the first sub-wall and the second sub-wall. The first sub-wall is higher than the second sub-wall in the direction of gravity.

Thus, a step is formed between the first sub-wall and the second sub-wall, and the first sub-wall is higher than the second sub-wall. After flowing into the second reversing flow passage 42f from the second flow passage 41b, the fluid flows through the first sub-wall, passes through the steps of the first sub-wall and the second sub-wall, and naturally flows to the second sub-wall. In this way, the smoothness of the fluid flowing in the second reversing flow passage 42f is improved, and the smoothness of the fluid flowing in the heat exchange assembly 40 is further improved, so as to improve the heat exchange efficiency of the heat exchange assembly 40 and the battery cells 30.

The case 11 provided according to the embodiment of the present application includes the heat exchange assembly 40 provided in any of the embodiments described above.

The case 11 provided in this embodiment of the present application has the same technical effects due to the heat exchange assembly 40 provided in any of the embodiments described above, and will not be described herein again.

The battery 10 provided according to the embodiment of the present application includes the case 11 and the battery cell 30 provided in the above embodiment, the battery cell 30 is accommodated in the case 11, and the heat exchanging member 41 is in contact with the battery cell 30 and is used for heat exchanging with the battery cell 30.

According to the battery 10 provided by the embodiment of the application, the heat exchange piece 41 and the battery monomer 30 are arranged and are subjected to heat exchange with the battery monomer 30, and the first flow channel 41a, the second flow channel 41b and the third flow channel 41c of the heat exchange piece 41 are connected in series, so that the heating or cooling uniformity of the heat exchange assembly 40 to the battery monomer 30 is improved, the temperature uniformity of the battery monomer 30 is improved, the risk of thermal runaway of the battery monomer 30 due to local temperature rising is reduced, and the reliability of the battery 10 is improved.

The power utilization device provided in the embodiment of the present application includes the battery 10 provided in the above embodiment, and the battery 10 is used for providing electric energy.

The power utilization device provided in the embodiment of the present application has the same technical effects due to the battery 10 provided in the above embodiment, and will not be described in detail herein.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be replaced with other technical solutions, which may not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims (13)

1. A heat exchange assembly, comprising:

a heat exchange member having a first flow passage, a second flow passage, and a third flow passage extending in a first direction and through which a fluid flows;

the fluid reversing piece is arranged at two ends of the heat exchange piece along the first direction and comprises a fluid inlet, a fluid outlet, a first flow port, a second flow port, a third flow port, a first reversing flow passage and a second reversing flow passage, the first reversing flow passage is communicated with the fluid inlet and the first flow port, and the second reversing flow passage is communicated with the second flow port and the third flow port;

the two ends of the first flow channel are respectively communicated with the first flow port and the third flow port, the two ends of the second flow channel are respectively communicated with the second flow port, and the two ends of the third flow channel are respectively communicated with the third flow port and the first flow port, so that the first flow channel, the second flow channel and the third flow channel are serially communicated.

2. The heat exchange assembly of claim 1 wherein the bottom wall of the first reversing flow channel is higher than the bottom wall of the second reversing flow channel in the direction of gravity.

3. The heat exchange assembly of claim 1 wherein the first flow passage, the second flow passage, and the third flow passage are juxtaposed in a second direction, the second direction intersecting the first direction, the second flow passage being located between the first flow passage and the third flow passage.

4. A heat exchange assembly according to any one of claims 1 to 3, wherein the fluid diverter comprises:

a housing having the fluid inlet and outlet;

a first separator disposed within the housing for separating the first and second reversing flow paths, the first and second flow ports being located on either side of the first separator;

the second separating piece is connected to the shell, and the second flow port and the third flow port are respectively positioned on two sides of the second separating piece.

5. The heat exchange assembly of claim 4 wherein the housing, the first divider and the second divider are integrally formed.

6. The heat exchange assembly of claim 4 wherein an end of the first divider facing the heat exchange member has a first snap-fit connection with the heat exchange member.

7. The heat exchange assembly of claim 6 wherein said heat exchange member has at least one alternative passage, at least one said alternative passage being located between said first flow passage and said second flow passage; the first clamping part is provided with a first convex part, and at least part of the first convex part is arranged in the alternative channel so as to prevent fluid from flowing through the alternative channel.

8. The heat exchange assembly of claim 4 wherein a side of the second divider facing the heat exchange member has a second snap-fit connection with the heat exchange member.

9. The heat exchange assembly of claim 8 wherein said heat exchange member has at least one alternative passage, at least one of said alternative passages being located between said second flow passage and said third flow passage; the second clamping part is provided with a second convex part, and at least part of the second convex part is arranged in the alternative channel so as to prevent fluid from flowing through the alternative channel.

10. The heat exchange assembly of claim 1 wherein the bottom wall of the second reversing flow channel includes a first sub-wall, a second sub-wall, and a connecting sub-wall, the first sub-wall being located on a side of the second reversing flow channel adjacent the second flow port, the second sub-wall being located on a side of the second flow channel adjacent the third flow port, the connecting sub-wall connecting the first sub-wall and the second sub-wall; the first sub-wall is higher than the second sub-wall in the direction of gravity.

11. A cabinet comprising a heat exchange assembly according to any one of claims 1 to 10.

12. A battery, comprising:

the case of claim 11;

and the battery cell is accommodated in the box body, and the heat exchange piece is in contact with the battery cell and is used for exchanging heat with the battery cell.

13. An electrical device comprising a battery as claimed in claim 12, said battery being arranged to provide electrical energy.

Images