Heat exchange device and battery pack

Abstract

The application provides a heat exchange device and a battery pack, wherein the heat exchange device comprises: a body having a first type of heat exchange flow channel and a second type of heat exchange flow channel, the second type of heat exchange flow channel being in communication with the first type of heat exchange flow channel, so that the second type of heat exchange flow channel receives heat exchange working medium flowing out of the first type of heat exchange flow channel; and a turbulence structure configured to disturb the heat exchange working medium in the second type of heat exchange flow channel; wherein the turbulence structure is arranged in the second type of heat exchange flow channel. In the embodiment of the application, the flow state of the heat exchange working medium in the second type of heat exchange flow channel can be changed by arranging the turbulence structure, the mixing effect of the heat exchange working medium in the second type of heat exchange flow channel is enhanced, the heat exchange intensity of the second type of heat exchange flow channel is improved, the loss of heat exchange efficiency caused by the change in temperature of the heat exchange working medium after passing through the first type of heat exchange flow channel is compensated, the heat exchange efficiency of the first type of heat exchange flow channel and the second type of heat exchange flow channel is balanced, and the uniformity of the temperature in different regions of the battery pack is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a heat exchange device and a battery pack. Background Technology

[0002] Currently, battery packs face significant thermal management challenges during high-power charging and discharging. In related technologies, battery packs typically utilize cold plates for heat exchange with the cells; however, current cold plate flow channel arrangements tend to create significant temperature gradients across different areas of the battery pack. Utility Model Content

[0003] The embodiments of this application provide a heat exchange device and a battery pack to at least partially solve the above-mentioned technical problems.

[0004] In a first aspect, embodiments of this application provide a heat exchange device, comprising:

[0005] The body has a first type of heat exchange channel and a second type of heat exchange channel, wherein the second type of heat exchange channel is connected to the first type of heat exchange channel so that the second type of heat exchange channel receives the heat exchange working fluid flowing out of the first type of heat exchange channel; and

[0006] A turbulence-disrupting structure is configured to disturb the heat transfer medium in the second type of heat exchange channel;

[0007] The turbulence structure is disposed in the second type of heat exchange channel.

[0008] By adopting the above scheme and setting the turbulence structure, the flow state of the heat exchange medium in the second type of flow channel can be changed, the mixing effect of the heat exchange medium in the second type of heat exchange channel can be enhanced, thereby improving the heat exchange intensity of the second type of heat exchange channel, compensating for the loss of heat exchange efficiency caused by the temperature change of the heat exchange medium after passing through the first type of heat exchange channel, thus balancing the heat exchange efficiency of the first type of heat exchange channel and the second type of heat exchange channel, and improving the temperature uniformity of different areas in the battery pack.

[0009] Optionally, in some embodiments of this application, at least one of the second type of heat exchange channels is spaced apart from the first type of heat exchange channel along a first direction;

[0010] In the first direction, the boundary width of the second type of heat exchange channel is smaller than the boundary width of the first type of heat exchange channel.

[0011] By adopting the above scheme, the first type of heat exchange channel occupies a large area in the body, so that the body as a whole can obtain a more uniform heat exchange efficiency.

[0012] Optionally, in some embodiments of this application, the turbulence structure includes:

[0013] Multiple convex bulges are spaced apart along the extension direction of the second type of heat exchange channel.

[0014] In the extension direction of the second type of heat exchange channel, at least a portion of two adjacent convex bulges are staggered.

[0015] By employing the above scheme, multiple convex bulges are spaced apart along the extension direction of the second type of heat exchange channel, allowing the turbulence structure to continuously agitate the heat exchange medium, thereby improving the mixing effect and maintaining the heat exchange efficiency of the second type of heat exchange channel. Furthermore, by staggering at least a portion of adjacent convex bulges, it is ensured that each convex bulge can act on the heat exchange medium in the second type of heat exchange channel.

[0016] Optionally, in some embodiments of this application, the turbulence structure includes:

[0017] At least two first turbulence units, each first turbulence unit comprising at least two convex hulls spaced apart in a first direction;

[0018] At least two second turbulence units, each second turbulence unit comprising at least two convex hulls spaced apart in a first direction;

[0019] In the extension direction of the second type of heat exchange channel, the first turbulence unit and the second turbulence unit are alternately arranged at intervals;

[0020] The width of the convex hull in the first turbulence unit is different from the width of the convex hull in the second turbulence unit; and / or, the length of the convex hull in the first turbulence unit is different from the length of the convex hull in the second turbulence unit; the number of convex hulls in the first turbulence unit is different from the number of convex hulls in the second turbulence unit.

[0021] By employing the above scheme, at least two convex humps are set in the same turbulence unit to disturb the heat exchange process. However, microchannels are formed between adjacent convex humps within the same turbulence unit, allowing the heat exchange medium to gradually stabilize within these microchannels. To ensure continuous disturbance of the heat exchange medium in the second type of heat exchange channel by the turbulence structure, this embodiment uses alternating intervals between the first and second turbulence units. This allows the heat exchange medium's flow path and turbulence level to be adjusted under the combined action of the first and second turbulence units, improving mixing efficiency and maintaining the heat exchange efficiency of the second type of heat exchange channel.

[0022] Meanwhile, by limiting the sizes of the convex hulls in the first turbulence unit and the second turbulence unit to be different, at least two convex hulls in the first turbulence unit and at least two convex hulls in the second turbulence unit can be staggered from each other, and by making the sizes of the microchannels in the first turbulence unit different from the sizes of the microchannels in the second turbulence unit, it is ensured that the heat exchange medium can be continuously disturbed in the second type of heat exchange channel.

[0023] By combining different numbers of convex hulls in the first and second turbulence units, the overall turbulence effect of the first and second turbulence units is further improved.

[0024] Optionally, in some embodiments of this application, the body further comprises:

[0025] The liquid outlet is configured to allow the heat exchange working fluid in the main body to flow out.

[0026] Among them, the number of convex hulls in the plurality of second turbulence units near the liquid outlet is greater than or equal to the number of convex hulls in the plurality of second turbulence units far from the liquid outlet.

[0027] Using the above scheme, since the heat exchange medium continuously exchanges heat with the battery cell in the second type of heat exchange channel, the overall temperature of the heat exchange medium is higher closer to the liquid outlet. By limiting the number of bulges in the multiple second turbulence units near the liquid outlet to be greater than or equal to the number of bulges in the multiple second turbulence units far from the liquid outlet, the flow rate of the heat exchange medium in the multiple second turbulence units near the liquid outlet is faster, which can compensate for the loss of heat exchange efficiency caused by the temperature change of the heat exchange medium, thereby balancing the heat exchange efficiency of each part of the second type of heat exchange channel.

[0028] Optionally, in some embodiments of this application, the body further comprises:

[0029] The liquid outlet is configured to allow the heat exchange working fluid in the main body to flow out.

[0030] The second type of heat exchange channel includes a first channel section and a second channel section, wherein the second channel section is connected between the first channel section and the liquid outlet.

[0031] The width of the second flow channel section is smaller than the width of the first flow channel section.

[0032] By adopting the above scheme, the heat exchange efficiency of the first flow channel is limited by the combination of the first flow channel and the second flow channel, while the flow channel width of the second flow channel is reduced, the flow velocity of the heat exchange medium in the second flow channel is increased, and the convergence effect is achieved, ensuring that the heat exchange medium can flow out of the outlet quickly.

[0033] Optionally, in some embodiments of this application, the turbulence structure further includes:

[0034] The third turbulence unit is at least partially disposed in the second flow channel section;

[0035] The first turbulence unit and the second turbulence unit are located in the first flow channel section;

[0036] The third turbulence unit includes at least two convex hulls with different widths and / or lengths.

[0037] By adopting the above scheme, since the width of the second flow channel is reduced relative to the width of the first flow channel, this application adjusts the width and length of the convex hull of the third turbulence unit so that the layout of the convex hull in the third turbulence unit can be adapted to the structure of the second flow channel and take into account the turbulence effect.

[0038] Optionally, in some embodiments of this application, the second type of heat exchange channel is connected to at least two of the first type of heat exchange channels;

[0039] The body also has:

[0040] The liquid inlet is used to receive external heat exchange medium.

[0041] At least two branch channels are connected to the inlet, respectively; and

[0042] A converging flow channel is connected between at least two of the first type of heat exchange flow channels and at least two of the branch flow channels;

[0043] Among them, at least two diversion channels are arranged at intervals along the first direction.

[0044] By adopting the above scheme, through the design of at least two first-type heat exchange channels, each first-type heat exchange channel performs heat exchange independently, so that the coolant is evenly distributed, which is conducive to achieving thermal equilibrium; and, at least two first-type heat exchange channels can form a pressure differential flow splitting structure.

[0045] By setting at least two branch channels, the heat exchange medium input from the inlet is guided to different positions in the converging channel, reducing the pressure difference at different positions in the converging channel, thereby making the flow velocity and pressure at the inlet of each type I heat exchange channel connected to the converging channel tend to be consistent.

[0046] Optionally, in some embodiments of this application, the body includes a flow channel plate and a cover plate;

[0047] The flow channel plate and the cover plate are stacked along the second direction, and the first type of heat exchange flow channel and the second type of heat exchange flow channel are respectively formed between the flow channel plate and the cover plate.

[0048] By adopting the above scheme, the first type of heat exchange channel and the second type of heat exchange channel are formed by the cooperation of the flow channel plate and the cover plate, which facilitates processing.

[0049] Optionally, in some embodiments of this application, the heat exchange device further includes:

[0050] A reinforcing member is provided on the side of the flow channel plate away from the cover plate;

[0051] At least a portion of the reinforcing member abuts against the flow channel plate.

[0052] By adopting the above solution, and by setting up reinforcing members, and ensuring that at least part of the reinforcing members abut against the flow channel plate, the reinforcing members provide support for the flow channel plate, thereby reducing the possibility of bending deformation of the body under stress and improving the stability and reliability of the body.

[0053] Optionally, in some embodiments of this application, a plurality of the reinforcing members are spaced apart along a third direction, which intersects with the second direction;

[0054] In the third direction, the ratio of the sum of the dimensions of the plurality of reinforcing members to the dimension of the flow channel plate ranges from 0.3 to 1.

[0055] By adopting the above solution, multiple reinforcing members are spaced apart in the third direction, and the ratio of the size of the reinforcing members to the size of the flow channel plate is limited. This ensures the supporting effect of the reinforcing members on the flow channel plate while reducing the material cost of the reinforcing members.

[0056] Optionally, in some embodiments of this application, the heat exchange device further includes:

[0057] An outer cladding layer is disposed on the side of the flow channel plate away from the cover plate to at least block heat transfer from the flow channel plate;

[0058] At least a portion of the outer cladding is arranged between two adjacent reinforcing members.

[0059] By adopting the above solution and setting the outer coating, the heat transfer between the flow channel plate and the outside environment can be reduced, thus achieving the effects of heat preservation and anti-condensation.

[0060] Secondly, embodiments of this application provide a battery pack including a battery cell and a heat exchange device as described above; wherein the heat exchange device is configured to transfer heat with the battery cell.

[0061] By adopting the above scheme, the flow state of the heat exchange medium in the second type of flow channel can be changed by setting the turbulence structure in the heat exchange device of the battery pack. This enhances the mixing effect of the heat exchange medium in the second type of heat exchange channel, thereby improving the heat exchange intensity of the second type of heat exchange channel. It also makes up for the loss of heat exchange efficiency caused by the temperature change of the heat exchange medium after passing through the first type of heat exchange channel, thereby balancing the heat exchange efficiency of the first and second type of heat exchange channels and improving the temperature uniformity of different areas in the battery pack. Attached Figure Description

[0062] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0063] Figure 1 This is an exploded view of the heat exchange device provided in an embodiment of this application;

[0064] Figure 2 This is a top view of the flow channel plate in the heat exchange device provided in the embodiments of this application;

[0065] Figure 3 yes Figure 2 An enlarged schematic diagram of part A in the middle;

[0066] Figure 4 yes Figure 2 Enlarged schematic diagram of part B;

[0067] Figure 5 This is a schematic diagram illustrating the principle of the turbulence structure acting on the heat exchange medium in the heat exchange device provided in the embodiments of this application.

[0068] Figure 6 yes Figure 2 An enlarged schematic diagram of section C;

[0069] Figure 7 This is a perspective view of the heat exchange device provided in an embodiment of this application;

[0070] Figure 8 yes Figure 7 An enlarged schematic diagram of section D in the middle;

[0071] Figure 9 This is a bottom view of the heat exchange device provided in an embodiment of this application;

[0072] Figure 10 This is a cross-sectional view of the body and reinforcing member in the heat exchange device provided in the embodiments of this application;

[0073] Figure 11 yes Figure 10 An enlarged schematic diagram of section E in the middle;

[0074] Figure 12 This is a three-dimensional schematic diagram of the reinforcing member in the heat exchange device provided in the embodiments of this application.

[0075] Explanation of reference numerals in the attached figures:

[0076] 100. Heat exchange device;

[0077] 110. Body; 111. First type of heat exchange channel; 112. Second type of heat exchange channel; 112a. First channel section; 112b. Second channel section; 112c. Transition section; 113. Liquid outlet; 114. Connecting channel; 115. Liquid inlet; 116. Diverting channel; 117. Converging channel;

[0078] 110a, flow channel plate; 110b, cover plate; 118, heat exchange surface;

[0079] 120. Turbulence structure; 120a. First turbulence unit; 120b. Second turbulence unit; 120c. Third turbulence unit; 121. Convex hull; R1. First microchannel; R2. Second microchannel;

[0080] 130. Reinforcing member; 130a. First-class reinforcing member; 130b. Second-class reinforcing member; 131. Support; 132. Reinforcing rib;

[0081] 141. First mounting beam; 142. Second mounting beam. Detailed Implementation

[0082] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Furthermore, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application.

[0083] In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in its actual use or operating state, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device. Furthermore, in the description of this application, the term "comprising" means "including but not limited to". The terms first, second, third, etc., are used merely as illustrative purposes and do not impose numerical requirements or establish a numerical order.

[0084] In this application, "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. A and B can be singular or plural.

[0085] Firstly, referring to Figure 1 and Figure 2 This application provides a heat exchange device 100, including: a body 110 and a turbulence structure 120.

[0086] refer to Figure 1 and Figure 2 The body 110 of this application embodiment has a first type of heat exchange channel 111 and a second type of heat exchange channel 112. The second type of heat exchange channel 112 is connected to the first type of heat exchange channel 111 so that the second type of heat exchange channel 112 receives the heat exchange working fluid flowing out of the first type of heat exchange channel 111. The turbulence structure 120 is configured to turbulent the heat exchange working fluid in the second type of heat exchange channel 112. The turbulence structure 120 is disposed in the second type of heat exchange channel 112.

[0087] It is understandable that the first type of heat exchange channel 111 and the second type of heat exchange channel 112 are located at different positions in the body 110 to exchange heat with the cells at different positions in the battery pack. The heat exchange medium in the first type of heat exchange channel 111 has a relatively gentle flow state, such as laminar flow. The flow of the heat exchange medium in the first type of heat exchange channel 111 is relatively orderly, and the heat transfer mainly relies on the heat conduction effect of the laminar bottom layer.

[0088] The turbulence structure 120 can change the flow state of the heat exchange medium in the second type of flow channel, as shown in the reference. Figure 5 The heat exchange medium undergoes convective mixing under the action of the turbulence structure 120, resulting in a disordered state, such as turbulence, in the second type of heat exchange channel 112. Under turbulent conditions, the mixing of the heat exchange medium in the second type of heat exchange channel 112 is enhanced, thereby improving the heat exchange intensity of the second type of heat exchange channel 112.

[0089] Since the second type of heat exchange channel 112 is located downstream of the first type of heat exchange channel 111, the temperature of the heat exchange medium changes (rises or falls) after it exchanges heat with the battery cell through the first type of heat exchange channel 111. The turbulence structure 120 can compensate for the loss of heat exchange efficiency caused by the temperature change of the heat exchange medium, thereby balancing the heat exchange efficiency of the first type of heat exchange channel 111 and the second type of heat exchange channel 112, improving the temperature uniformity of different areas in the battery pack, and improving the overall performance and service life of the battery pack.

[0090] Based on this, the heat exchange device 100 in this embodiment can be applied to long-string battery structures to solve problems such as difficult heat dissipation and uneven temperature distribution in long-string battery structures, and avoid risks such as local overheating and thermal runaway. For example, it can be applied to a battery pack of the 1P104S specification, where 1P indicates that the battery pack consists of one battery cell arranged in parallel, 104 indicates that the number of cells in the battery cell is 104, and S indicates that the battery cells in the battery cell are arranged in series.

[0091] In some specific embodiments, the turbulence structure 120 can be integrally formed with the body 110.

[0092] In some other embodiments, the turbulence structure 120 can also be fixedly connected to the body 110 by welding, bonding or other means.

[0093] In some specific implementations, in order to increase the residence time of the heat exchange medium in the first type of heat exchange channel 111, the shape of the first type of heat exchange channel 111 can be one or more of the following: S-shaped, bow-shaped, M-shaped, wavy, etc. The appropriate channel shape and combination of different channel shapes can be selected according to the actual design requirements of the channel.

[0094] In some embodiments of this application, reference is made to Figure 2 At least one second type of heat exchange channel 112 is provided at a distance from the first type of heat exchange channel 111 along a first direction; in the first direction, the boundary width L2 of the second type of heat exchange channel 112 is smaller than the boundary width L1 of the first type of heat exchange channel 111.

[0095] It can be understood that when there is only one type of heat exchange channel 111, the boundary width of the second type of heat exchange channel 112 is smaller than the boundary width of the first type of heat exchange channel 111; or, when there are two or more type of heat exchange channels 111, the boundary width of the second type of heat exchange channel 112 is smaller than the sum of the boundary widths of all the first type of heat exchange channels 111. Here, the boundary width can be understood as the distance between the two edges of the heat exchange channel in the first direction.

[0096] With this approach, since the second type of heat exchange channel 112 has a higher heat exchange intensity, the temperature change rate of the heat exchange medium in the second type of heat exchange channel 112 is higher. If the area occupied by the second type of heat exchange channel 112 is too large, it is easy to cause the temperature difference of the heat exchange medium at both ends of the first type of heat exchange channel 111 to be too large, resulting in uneven temperature distribution.

[0097] Based on the above considerations, this application makes the first type of heat exchange channel 111 occupy a large area in the body 110, so that the body 110 as a whole obtains a more uniform heat exchange efficiency.

[0098] It should be noted that the first direction here refers to the left and right directions only for the convenience of introducing specific embodiments of this application. There is no absolute correspondence between the first direction and the left and right directions. Similarly, there is no absolute correspondence between the second direction and the up and down directions, and between the third direction and the front and back directions. Furthermore, the first direction, second direction, and third direction of this application are only used to express relative positional relationships. They only indicate approximate locations, not absolute geometric relationships.

[0099] In one example of this application, the left-right direction can be the width direction of the body 110, and the front-back direction can be the length direction of the body 110.

[0100] In some specific implementation methods, refer to Figure 2 and Figure 3 The body 110 also has a connecting channel 114, which extends along a first direction, and at least two first-type heat exchange channels 111 are connected to second-type heat exchange channels 112 through the connecting channel 114.

[0101] The second type of heat exchange channel 112 can be disposed on one side of the whole consisting of all the first type of heat exchange channels 111; or, the second type of heat exchange channel 112 can also be disposed between two of the first type of heat exchange channels 111.

[0102] In some embodiments of this application, reference is made to Figures 2 to 4 The turbulence structure 120 includes: convex humps 121. A plurality of convex humps 121 are spaced apart along the extension direction of the second type of heat exchange channel 112. At least a portion of adjacent convex humps 121 are staggered along the extension direction of the second type of heat exchange channel 112.

[0103] It is understood that on a projection plane perpendicular to the extension direction of the second type of heat exchange channel 112, the projections of two adjacent convex humps 121 are at least partially offset.

[0104] By employing this scheme, multiple protrusions 121 are spaced apart along the extension direction of the second type of heat exchange channel 112, allowing the turbulence structure 120 to continuously agitate the heat exchange medium, thereby improving the mixing effect and maintaining the heat exchange efficiency of the second type of heat exchange channel 112. Furthermore, by staggering at least a portion of adjacent protrusions 121, it is ensured that each protrusion 121 can act on the heat exchange medium in the second type of heat exchange channel 112.

[0105] In one example of this application, reference is made to Figure 2 and Figure 4 The second type of heat exchange channel 112 extends along the front-to-back direction.

[0106] In some embodiments of this application, reference is made to Figures 2 to 4The turbulence structure 120 includes a first turbulence unit 120a and a second turbulence unit 120b.

[0107] At least two first turbulence units 120a are provided, each including at least two convex humps 121 spaced apart in a first direction. At least two second turbulence units 120b are provided, each including at least two convex humps 121 spaced apart in a first direction. In the extension direction of the second type of heat exchange channel 112, the first turbulence units 120a and the second turbulence units 120b are alternately spaced apart. The convex humps 121 in the first turbulence unit 120a and the convex humps 121 in the second turbulence unit 120b have different dimensions; specifically, this difference in dimensions can be understood as at least one difference in width and length.

[0108] It can be understood that the width of the convex hull 121 is the dimension of the convex hull 121 along the left and right direction, and the width of the convex hull is the dimension of the convex hull along the front and back direction.

[0109] This approach involves setting at least two convex humps 121 within the same turbulence unit to agitate the heat exchange medium. However, adjacent convex humps 121 within the same turbulence unit create microchannels through which the heat exchange medium can pass, gradually stabilizing it within these microchannels. To ensure continuous agitation of the heat exchange medium in the second type of heat exchange channel 112 by the turbulence structure, this embodiment uses alternating turbulence units 120a and 120b. This allows the heat exchange medium to adjust its flow path and turbulence level under the combined action of the first and second turbulence units 120a and 120b, improving mixing efficiency and maintaining the heat exchange efficiency of the second type of heat exchange channel 112.

[0110] Meanwhile, by limiting the sizes of the convex humps in the first turbulence unit 120a and the second turbulence unit 120b to be different, at least two convex humps 121 in the first turbulence unit 120a and at least two convex humps 121 in the second turbulence unit 120b can be staggered from each other, and by making the size of the first microchannel R1 in the first turbulence unit 120a different from the size of the second microchannel R2 in the second turbulence unit 120b, it is ensured that the heat exchange medium can be continuously disturbed in the second type of heat exchange channel 112.

[0111] In some embodiments of this application, reference is made to Figures 2 to 4 The number of convex hulls 121 in the first turbulence unit 120a is different from the number of convex hulls 121 in the second turbulence unit 120b. By combining different numbers of convex hulls 121 in the first turbulence unit 120a and the second turbulence unit 120b, the overall turbulence effect of the first turbulence unit 120a and the second turbulence unit 120b is further improved.

[0112] In one example of this application, the width of the convex hull 121 in the first turbulence unit 120a is different from the width of the convex hull 121 in the second turbulence unit 120b; this ensures that at least two convex hulls 121 in the first turbulence unit 120a and at least two convex hulls 121 in the second turbulence unit 120b are staggered; furthermore, the width of the first microchannel R1 in the first turbulence unit 120a and the width of the second microchannel R2 in the second turbulence unit 120b can be different, thereby the heat exchange medium in the first microchannel R1 and the second microchannel R2 have different flow velocities, so that the heat exchange medium can be fully mixed during the transition of different flow velocities.

[0113] In another example of this application, the length of the convex hull 121 in the first turbulence unit 120a is different from the length of the convex hull 121 in the second turbulence unit 120b, so that the heat exchange medium has different lengths in the first microchannel R1 and the second microchannel R2, which can better adapt to the velocity difference in the first microchannel R1 and the second microchannel R2, and is beneficial to the flow balance of the heat exchange medium in the first turbulence unit 120a and the second turbulence unit 120b.

[0114] In another example of this application, the width and length of the convex hull 121 in the first turbulence unit 120a are different from the width and length of the convex hull 121 in the second turbulence unit 120b, and the number of convex hulls 121 in the second turbulence unit 120b is greater than the number of convex hulls 121 in the first turbulence unit 120a. In this embodiment, by limiting the width, length, and number of convex hulls 121 to be different, the above-mentioned turbulence effect and flow balance can be taken into account.

[0115] In some specific implementation methods, refer to Figure 2 and Figure 4 The widths of at least two convex hulls 121 in the first turbulence unit 120a and at least two convex hulls 121 in the second turbulence unit 120b can be different, so that the convex hulls in the first turbulence unit 120a and the second turbulence unit 120b can maintain a suitable correspondence.

[0116] In some specific implementation methods, refer to Figure 2 and Figure 4 The number, size, and shape of the convex hulls 121 in each group of turbulence units can be selected according to the design requirements of the second type of heat exchange channel 112.

[0117] In some specific implementations, the shape of the convex hull 121 can be one or more of the following: elliptical strip, cylindrical, polygonal, etc. The appropriate shape of the convex hull 121 and combinations of different convex hull 121 shapes can be selected according to the actual design requirements of the flow channel.

[0118] In one example of this application, the convex hull 121 is elliptical in shape, with a length of 50mm to 80mm and a width of 20mm to 40mm. This can enhance the boundary layer disturbance of the heat exchange medium in the second type of heat exchange channel 112 and improve the heat exchange efficiency.

[0119] In some specific implementation methods, refer to Figure 2 and Figure 4 The lengths of the convex hulls in the second spoiler units 120b in different directions can also be different to meet different design requirements.

[0120] In some embodiments of this application, reference is made to Figure 2 and Figure 4 The main body 110 also has: liquid outlet 113.

[0121] The outlet 113 is configured to allow the heat exchange medium in the body 110 to flow out; the number of protrusions 121 in the plurality of second turbulence units 120b near the outlet 113 is greater than or equal to the number of protrusions 121 in the plurality of second turbulence units 120b away from the outlet.

[0122] It is understandable that the more convex hulls 121 there are in the second turbulence unit 120b, the smaller the width of the second microchannel R2 in the second turbulence unit 120b, the faster the flow rate of the heat exchange medium, and thus the higher the heat exchange efficiency.

[0123] With this approach, since the heat exchange medium continuously exchanges heat with the battery cell in the second type of heat exchange channel 112, the overall temperature of the heat exchange medium is higher closer to the liquid outlet 113. By limiting the number of protrusions 121 in the multiple second turbulence units 120b near the liquid outlet 113 to be greater than or equal to the number of protrusions 121 in the multiple second turbulence units 120b far from the liquid outlet, the flow rate of the heat exchange medium in the multiple second turbulence units 120b near the liquid outlet 113 is faster, which can compensate for the loss of heat exchange efficiency caused by the temperature change of the heat exchange medium, thereby balancing the heat exchange efficiency of each part of the second type of heat exchange channel 112.

[0124] In one example of this application, reference is made to Figure 4 The number of convex humps 121 in the plurality of second turbulence units 120b near the liquid outlet 113 is greater than the number of convex humps 121 in the plurality of second turbulence units 120b far from the liquid outlet.

[0125] In some embodiments of this application, reference is made to Figure 2 and Figure 4The body 110 also has a liquid outlet 113. The liquid outlet 113 is configured to allow the heat exchange medium in the body 110 to flow out; the second type of heat exchange channel 112 includes a first channel section 112a and a second channel section 112b, the second channel section 112b being connected between the first channel section 112a and the liquid outlet 113; the channel width of the second channel section 112b is smaller than the channel width of the first channel section 112a.

[0126] It can be understood that the width of the flow channel is the width of the flow channel section in the left-right direction. Under different flow channel widths, the flow velocity of the heat exchange medium is different. The first flow channel section 112a and the second flow channel section 112b are also provided with a transition section, and the transition section 112c forms a width transition between the first flow channel section 112a and the second flow channel section 112b.

[0127] By adopting this scheme, the heat exchange efficiency of the first flow channel section 112a is limited by the combination of the first flow channel section 112a and the second flow channel section 112b, while the flow channel width of the second flow channel section 112b is reduced, the flow velocity of the heat exchange medium in the second flow channel section 112b is increased, and the converging effect is achieved, ensuring that the heat exchange medium can flow out of the outlet quickly.

[0128] In some embodiments of this application, reference is made to Figure 2 and Figure 4 The turbulence structure also includes a third turbulence unit 120c.

[0129] At least a portion of the third turbulence unit 120c is disposed in the second flow channel section 112b; the first turbulence unit 120a and the second turbulence unit 120b are located in the first flow channel section 112a. The third turbulence unit 120c includes at least two convex humps 121, at least one of the width and length of the at least two convex humps 121 being different.

[0130] It is understood that at least two convex hulls 121 in the third turbulence unit 120c have different widths, or different lengths, or both different widths and lengths.

[0131] With this approach, since the width of the second flow channel section 112b is smaller than that of the first flow channel section 112a, this application adjusts the width and length of the convex hull 121 of the third turbulence unit 120c so that the layout of the convex hull in the third turbulence unit 120c can be adapted to the structure of the second flow channel section 112b while taking into account the turbulence effect.

[0132] In one example of this application, reference is made to Figure 4A portion of the third turbulence unit 120c is located in the second flow channel section 112b, and another portion is located in the first flow channel section 112a. The third turbulence unit 120c may include two sets of protrusions 121 arranged in the front-to-back direction. The set of protrusions away from the liquid outlet 113 may adopt the same protrusion layout as the first turbulence unit 120a or the second turbulence unit 120b, and the length of some of the protrusions may be shortened to adapt to the width change of the transition area (i.e., the transition section 112c) between the first flow channel section 112a and the second flow channel section 112b. The width, length, and number of the set of protrusions 121 closer to the liquid outlet 113 may be designed accordingly based on the width and length of the second flow channel section 112b.

[0133] In some embodiments of this application, reference is made to Figures 2 to 4 The second type of heat exchange channel 112 is connected to at least two first type of heat exchange channels 111. Through the design of at least two first type of heat exchange channels 111, each first type of heat exchange channel 111 performs heat exchange independently, so that the coolant is evenly distributed, which is conducive to achieving thermal equilibrium. Furthermore, at least two first type of heat exchange channels 111 can form a pressure differential flow splitting structure.

[0134] Reference Figure 2 and Figure 6 The body 110 further includes: a liquid inlet 115, branch channels 116, and a converging channel 117. The liquid inlet 115 is used to receive external heat exchange medium; at least two branch channels 116 are respectively connected to the liquid inlet 115, and the at least two branch channels 116 are spaced apart along a first direction. The converging channel 117 connects the at least two first-type heat exchange channels 111 and the at least two branch channels 116.

[0135] Since there are two or more first-type heat exchange channels 111, the flow velocity and pressure at the inlet of each first-type heat exchange channel 111 will differ depending on the distance between its inlet and the liquid inlet 115. This application addresses this by providing at least two branch channels 116 to guide the heat exchange medium input through the liquid inlet 115 to different locations in the converging channel 117, reducing the pressure difference between different locations in the converging channel 117. This results in the flow velocity and pressure at the inlet of each first-type heat exchange channel 111 connected to the converging channel 117 tending to be more consistent.

[0136] In some specific implementations, the number of first-type heat exchange channels 111 can range from 2 to 5, while the number of branch channels 116 is greater than or equal to the number of first-type heat exchange channels 111.

[0137] In some specific implementation methods, refer to Figure 2 , Figure 4 , Figure 6 and Figure 7The inlet 115 and outlet 113 are located on the same side of the body 110, which facilitates the arrangement of the inlet and outlet pipelines. More specifically, the inlet 115 and outlet 113 are respectively equipped with quick-connect interfaces to enable quick connection to external pipelines.

[0138] In some embodiments of this application, reference is made to Figure 1 , Figure 10 and Figure 11 The body 110 includes a flow channel plate 110a and a cover plate 110b.

[0139] In this embodiment, the flow channel plate 110a and the cover plate 110b are stacked along the second direction, and the first type of heat exchange flow channel 111 and the second type of heat exchange flow channel 112 are respectively formed between the flow channel plate 110a and the cover plate 110b.

[0140] It is understood that the first type of heat exchange channel 111 and the second type of heat exchange channel 112 are at least stamped by the channel plate 110a, and the cover plate 110b covers the channel plate 110a to isolate the first type of heat exchange channel 111 and the second type of heat exchange channel 112 from the outside.

[0141] This design allows for the formation of a first type of heat exchange channel 111 and a second type of heat exchange channel 112 through the cooperation of the flow channel plate 110a and the cover plate 110b, which facilitates processing.

[0142] In some specific implementation methods, refer to Figure 1 The side of the cover plate 110b away from the flow channel plate 110a has a flat heat exchange surface 118, which contacts the battery cell for heat exchange, thereby increasing the heat exchange area between the body 110 and the battery cell.

[0143] In some specific embodiments, the flow channel plate 110a and the cover plate 110b can be independent of each other and are fixed together by welding; or, the flow channel plate 110a and the cover plate 110b can be integrally formed, and after the flow channel plate 110a is stamped, it is bent and welded to form the body 110.

[0144] In some specific embodiments, the turbulence structure 120 may be connected to the flow channel plate 110a or the cover plate 110b.

[0145] In some embodiments of this application, reference is made to Figure 1 and Figure 9 The heat exchange device 100 also includes a reinforcing member 130. The reinforcing member 130 is disposed on the side of the flow channel plate 110a away from the cover plate 110b; at least a portion of the reinforcing member 130 abuts against the flow channel plate 110a.

[0146] By adopting this solution, the reinforcement 130 is provided and at least a portion of the reinforcement 130 abuts against the flow channel plate 110a, so that the reinforcement 130 provides support for the flow channel plate 110a, reducing the possibility of bending deformation of the body 110 under stress and improving the stability and reliability of the body 110.

[0147] In some specific implementation methods, refer to Figures 9 to 12 The reinforcing member 130 includes a support part 131. Multiple support parts 131 are arranged in an array in the left-right direction and the front-back direction to achieve multi-point support for the flow channel plate 110a, thereby further improving stability and reliability.

[0148] Specifically, the side of the flow channel plate 110a away from the cover plate 110b is defined as the back side of the flow channel plate 110a, and at least part of the support portion 131 is embedded in the groove formed on the back side of the flow channel plate 110a, so as to avoid increasing the overall thickness of the reinforcing member 130 and the body 110 due to the provision of the support portion 131.

[0149] In some specific implementation methods, refer to Figure 12 The reinforcing member 130 also includes a reinforcing rib 132, which is disposed between the two support portions 131 in the front-rear direction, thereby improving the structural strength of the reinforcing member 130. More specifically, the reinforcing rib 132 is wavy in shape.

[0150] In some embodiments of this application, reference is made to Figure 1 and Figure 9 Multiple reinforcing members 130 are spaced apart along a third direction, which intersects with the second direction; in the third direction, the ratio of the sum of the dimensions of the multiple reinforcing members 130 to the dimension of the flow channel plate 110a ranges from 0.3 to 1.

[0151] It can be understood that in the third direction (front and back direction), the size of the flow channel plate 110a is also the length La of the flow channel plate 110a, and the size of the reinforcing member 130 is the width Wn of the reinforcing member 130, where n represents the number of the reinforcing member 130 in the front to back direction, that is, the sum of the sizes of multiple reinforcing members 130 is W1+W2+…+Wn.

[0152] In the third direction, the ratio of the sum of the dimensions of the multiple reinforcing members 130 to the dimension of the flow channel plate 110a can be one of 0.3 to 0.4, 0.4 to 0.5, 0.5 to 0.6, 0.6 to 0.7, 0.7 to 0.8, 0.8 to 0.9 or 0.9 to 1.

[0153] By adopting this solution, multiple reinforcing members 130 are spaced apart in the third direction, and the ratio of the size of the reinforcing member 130 to the size of the flow channel plate 110a is limited. This ensures the supporting effect of the reinforcing member 130 on the flow channel plate 110a while reducing the material cost of the reinforcing member 130.

[0154] In some specific implementations, the third direction is inclined to intersect with or perpendicular to the second direction.

[0155] In one example of this application, the third direction is set perpendicular to the second direction, and the third direction is set perpendicular to the first direction.

[0156] In some specific implementations, the sum of the dimensions of the multiple reinforcing members 130 is greater than one-third of the dimension of the flow channel plate 110a. Under this scheme, the support effect and material cost can be well balanced.

[0157] In some embodiments of this application, the thickness of the reinforcing member 130 ranges from 1.5 to 2.5 mm, ensuring its support performance while avoiding excessively increasing the overall thickness of the heat exchange device 100; of course, other thickness values ​​can also be selected according to actual design requirements.

[0158] In some embodiments of this application, reference is made to Figure 1 , Figure 7 and Figure 8 The heat exchange device 100 further includes a first mounting beam 141 and a second mounting beam 142. The first mounting beam 141 and the second mounting beam 142 assist in the installation of the main body 110 within the battery pack. The two first mounting beams 141 are spaced apart in the left-right direction, and the left and right sides of the main body 110 are respectively fixedly connected to the first mounting beams 141. The two second mounting beams 142 are spaced apart in the front-back direction, and the front and rear sides of the main body 110 are respectively fixedly connected to the second mounting beams 142. More specifically, the first mounting beams 141 and the second mounting beams 142 are fixedly connected, with the first mounting beam 141 located on the side of the flow channel plate 110a away from the cover plate 110b, and the second mounting beam 142 located on the side of the cover plate 110b away from the flow channel plate 110a. This allows the flow channel plate 110a and the cover plate 110b to be sandwiched between the first mounting beams 141 and the second mounting beams 142, forming a single unit and improving the reliability of the main body 110.

[0159] In some specific implementation methods, refer to Figure 1 and Figure 9The reinforcing member 130 includes a first type of reinforcing member 130a and a second type of reinforcing member 130b. The two first type of reinforcing members 130a are located at the ends of the body 110, and the first type of reinforcing members 130a are fixedly connected to the first mounting beam 141 and the second mounting beam 142, respectively. A plurality of second type of reinforcing members 130b are located between the two first type of reinforcing members 130a, and the two ends of the first type of reinforcing members 130a are fixedly connected to the first mounting beam 141, respectively.

[0160] In some embodiments of this application, the heat exchange device 100 further includes an outer cover (not shown). The outer cover is disposed on the side of the flow channel plate 110a away from the cover plate 110b to at least block heat transfer from the flow channel plate 110a; wherein at least a portion of the outer cover is disposed between two adjacent reinforcing members 130.

[0161] By adopting this solution and setting an outer covering layer, heat transfer between the flow channel plate 110a and the outside environment can be reduced, achieving the effects of heat preservation and anti-condensation.

[0162] In some specific embodiments, since the reinforcing member 130 covers the back of the flow channel plate 110a and also serves as insulation, the outer covering layer can be applied only to the area not covered by the reinforcing member 130. That is, on the projection plane perpendicular to the first direction, the projection of the outer covering layer is completely offset from the projection of the reinforcing member 130. In this case, the outer covering layer does not completely cover the back of the flow channel plate 110a. While ensuring the insulation effect, the amount of outer covering layer used can be reduced, saving manufacturing costs. Of course, the outer covering layer can also completely cover the back of the flow channel plate 110a to further improve the insulation effect.

[0163] In some specific embodiments, the outer covering layer can be one or more of an anti-condensation material, an insulating material, and a thermal insulation material. More specifically, the outer covering layer can be a coating or a filler.

[0164] In one example of this application, the outer covering may be an anti-condensation insulating coating.

[0165] Secondly, this application provides a battery pack including a battery cell and the heat exchange device 100 described above; wherein the heat exchange device 100 is configured to transfer heat with the battery cell. This battery pack possesses all the beneficial effects of the aforementioned heat exchange device 100, which will not be elaborated upon here.

[0166] In one example of this application, the battery pack is a power battery for a vehicle.

[0167] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A heat exchange device, characterized by, include: The body has a first type of heat exchange channel and a second type of heat exchange channel, wherein the second type of heat exchange channel is connected to the first type of heat exchange channel so that the second type of heat exchange channel receives the heat exchange working fluid flowing out of the first type of heat exchange channel. and A turbulence-disrupting structure is configured to disturb the heat transfer medium in the second type of heat exchange channel; The turbulence structure is disposed in the second type of heat exchange channel.

2. The heat exchange device according to claim 1, wherein At least one of the second type of heat exchange channels is spaced apart from the first type of heat exchange channel along a first direction; In the first direction, the boundary width of the second type of heat exchange channel is smaller than the boundary width of the first type of heat exchange channel.

3. The heat exchange device according to claim 1, wherein The turbulence structure includes: Multiple convex bulges are spaced apart along the extension direction of the second type of heat exchange channel; In the extension direction of the second type of heat exchange channel, at least a portion of two adjacent convex bulges are staggered.

4. The heat exchange device according to claim 3, wherein The turbulence structure includes: At least two first turbulence units, each first turbulence unit comprising at least two convex hulls spaced apart in a first direction; At least two second turbulence units, each second turbulence unit comprising at least two convex hulls spaced apart in a first direction; In the extension direction of the second type of heat exchange channel, the first turbulence unit and the second turbulence unit are alternately arranged at intervals; The width of the convex hull in the first turbulence unit is different from the width of the convex hull in the second turbulence unit; and / or, the length of the convex hull in the first turbulence unit is different from the length of the convex hull in the second turbulence unit; and / or, the number of convex hulls in the first turbulence unit is different from the number of convex hulls in the second turbulence unit.

5. The heat exchange device according to claim 4, wherein The body also has: The liquid outlet is configured to allow the heat exchange working fluid in the main body to flow out. Among them, the number of convex hulls in the plurality of second turbulence units near the liquid outlet is greater than or equal to the number of convex hulls in the plurality of second turbulence units far from the liquid outlet.

6. The heat exchange device according to claim 4, wherein The body also has: The liquid outlet is configured to allow the heat exchange working fluid in the main body to flow out. The second type of heat exchange channel includes a first channel section and a second channel section, wherein the second channel section is connected between the first channel section and the liquid outlet. The width of the second flow channel section is smaller than the width of the first flow channel section.

7. The heat exchange device according to claim 6, characterized in that, The turbulence-disrupting structure also includes: The third turbulence unit is at least partially disposed in the second flow channel section; The first turbulence unit and the second turbulence unit are located in the first flow channel section; The third turbulence unit includes at least two convex hulls with different widths and / or lengths.

8. The heat exchange device according to claim 2, characterized in that, The second type of heat exchange channel is connected to at least two of the first type of heat exchange channels; The body also has: The liquid inlet is used to receive external heat exchange medium. At least two branch channels are connected to the inlet, respectively; and A converging flow channel connects at least two of the first type of heat exchange flow channels and at least two of the branch flow channels; Among them, at least two diversion channels are arranged at intervals along the first direction.

9. The heat exchange device according to any one of claims 1 to 8, characterized in that The main body includes a flow channel plate and a cover plate; The flow channel plate and the cover plate are stacked along the second direction, and the first type of heat exchange flow channel and the second type of heat exchange flow channel are respectively formed between the flow channel plate and the cover plate.

10. The heat exchange device according to claim 9, characterized in that, The heat exchange device further includes: A reinforcing member is provided on the side of the flow channel plate away from the cover plate; At least a portion of the reinforcing member abuts against the flow channel plate.

11. The heat exchange device according to claim 10, characterized in that, The plurality of the reinforcing members are spaced apart along a third direction, which intersects with the second direction; In the third direction, the ratio of the sum of the dimensions of the plurality of reinforcing members to the dimension of the flow channel plate ranges from 0.3 to 1.

12. The heat exchange device according to claim 10, characterized in that, The heat exchange device further includes: An outer cladding layer is disposed on the side of the flow channel plate away from the cover plate to at least block heat transfer from the flow channel plate; At least a portion of the outer cladding is arranged between two adjacent reinforcing members.

13. A battery pack, characterized by It includes a battery cell and a heat exchange device as described in any one of claims 1 to 12; wherein the heat exchange device is configured to transfer heat with the battery cell.

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