Heat exchange assembly and battery pack

Abstract

The utility model relates to a heat exchange assembly and a battery pack, the heat exchange assembly comprises a first heat exchange plate, a second heat exchange plate and a liquid collection box, the first heat exchange plate comprises a first liquid inlet flow channel, a first middle flow channel and a first liquid outlet flow channel which are communicated in sequence, and the second heat exchange plate comprises a second liquid inlet flow channel, a second middle flow channel and a second liquid outlet flow channel which are communicated in sequence; the liquid collecting box comprises a first cavity and a second cavity, one of the first cavity and the second cavity is communicated with the first liquid inlet flow channel and the second liquid inlet flow channel at the same time, the other one of the first cavity and the second cavity is communicated with the first liquid outlet flow channel, and the second liquid outlet flow channel is communicated with the first middle flow channel or the first liquid outlet flow channel. According to the embodiment of the invention, the heat exchange efficiency can be improved, the number of connecting positions of the whole heat exchange assembly and an external water path can be reduced, and then the assembling efficiency of the whole heat exchange assembly and peripheral parts can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery packs, and in particular to a heat exchange component and a battery pack. Background Art

[0002] With the rapid development of new energy electric vehicle technology, vehicle manufacturers have higher and higher requirements for high-power energy performance such as fast charging and discharging of batteries. Under severe application scenarios, the heat generated by the battery pack will increase sharply. If the heat cannot be removed in time, it will seriously affect the life and safety of the battery.

[0003] A battery pack generally contains multiple battery modules, and each battery module is composed of multiple battery cells. Each battery cell is provided with a tab for leading out the positive and negative poles of the battery cell. The tabs of the battery module need to be connected in series or in parallel through conductive connectors before outputting electrical energy as a whole.

[0004] At present, the heat management method of battery packs is mainly to lay a heat exchange plate at the bottom of the battery module, and use the heat exchange medium inside the heat exchange plate to transfer the heat of the battery away from the battery pack, thereby achieving heat dissipation of the battery module. However, for high-power application scenarios such as fast charging and discharging of batteries, the current battery pack heat management method is difficult to achieve a good heat dissipation effect. Utility Model Content

[0005] The embodiments of the present application provide a heat exchange assembly and a battery pack, which can improve heat exchange efficiency, simplify the number of connection positions between the heat exchange assembly as a whole and an external water channel, and thus improve the assembly efficiency of the heat exchange assembly as a whole and surrounding parts.

[0006] In a first aspect, an embodiment of the present application provides a heat exchange component, comprising: a first heat exchange plate, comprising a first liquid inlet channel, a first intermediate channel and a first liquid outlet channel connected in sequence, the plate surface of the first heat exchange plate is perpendicular to the first direction; a second heat exchange plate, comprising a second liquid inlet channel, a second intermediate channel and a second liquid outlet channel connected in sequence, the second heat exchange plate and the first heat exchange plate are arranged at intervals along the first direction, one of the first heat exchange plate and the second heat exchange plate is used to be installed to the bottom of the battery module, and the other is used to be installed to the top of the battery module; a liquid collecting box, comprising a first chamber and a second chamber, the first chamber is used to input a heat exchange medium, and the second chamber is used to output a heat exchange medium, a first partition is provided between the first chamber and the second chamber, one of the first chamber and the second chamber is simultaneously connected to the first liquid inlet channel and the second liquid inlet channel, the other is connected to the first liquid outlet channel, and the second liquid outlet channel is connected to the first intermediate channel or the first liquid outlet channel.

[0007] In some embodiments, the first chamber is connected to the first liquid inlet channel and the second liquid inlet channel at the same time, and the first chamber includes: a first sub-chamber, the first liquid inlet channel is connected to the first sub-chamber; a second sub-chamber, the second liquid inlet channel is connected to the second sub-chamber, and a second partition is provided between the first sub-chamber and the second sub-chamber; a diversion structure is arranged in the first chamber at a position close to the liquid inlet of the first chamber, and the diversion structure is used to divert the heat exchange medium input from the liquid inlet to the first sub-chamber and the second sub-chamber.

[0008] In some embodiments, along the first direction, the first sub-chamber is located close to the first heat exchange plate relative to the second sub-chamber; the diversion structure includes a water distribution pipe fixedly connected to the second partition plate, one end of the water distribution pipe is connected to the first sub-chamber, and the other end of the water distribution pipe is located close to the liquid inlet, and a gap is provided between the water distribution pipe and the liquid inlet.

[0009] In some embodiments, the first heat exchange plate includes: a plate body, a first liquid inlet channel, a first intermediate channel and a first liquid outlet channel are all arranged on a side of the plate body close to the second heat exchange plate; a cover body, covering the side of the plate body close to the second heat exchange plate, and a liquid collecting box is welded to the side of the cover body close to the second heat exchange plate; the side of the liquid collecting box facing the cover body is provided with: a first cavity, the cover body is provided with a first through hole connected to the first liquid inlet channel, one end of the first cavity is connected to the first sub-cavity, and the other end of the first cavity is connected to the first liquid inlet channel through the first through hole; a second cavity, the cover body is provided with a second through hole connected to the first liquid outlet channel, one end of the second cavity is connected to the second chamber, and the other end of the second cavity is connected to the first liquid outlet channel through the second through hole.

[0010] In some embodiments, multiple first liquid inlet channels and multiple first liquid outlet channels are provided, one of the first liquid inlet channels and the first liquid outlet channels is connected to the other via at least one first intermediate channel, the first cavity and the first liquid inlet channels are provided in one-to-one correspondence, and the second cavity and the first liquid outlet channels are provided in one-to-one correspondence.

[0011] In some embodiments, the liquid collecting tank also includes: a first joint, connected to the first chamber, one end of the first joint close to the first chamber is fixedly connected to the liquid inlet, and the first joint inputs heat exchange medium into the first chamber through the liquid inlet; a second joint, connected to the liquid outlet of the second chamber, one end of the second joint close to the second chamber is fixedly connected to the liquid outlet, and the second joint outputs the heat exchange medium in the second chamber through the liquid outlet.

[0012] In some embodiments, the second liquid inlet channel, the second intermediate channel and the second liquid outlet channel are all tubular structures, and multiple second intermediate channels are spaced apart along a second direction, the second direction is perpendicular to the first direction, and the side of the second intermediate channel facing the battery module is used to attach to the conductive connector of the battery module.

[0013] In some embodiments, the liquid collecting tank, the second liquid inlet channel, the second intermediate channel and the second liquid outlet channel are distributed successively along a third direction, the third direction is perpendicular to both the first direction and the second direction, the second liquid outlet channel is provided with a first water outlet, the first heat exchange plate is provided with a second water outlet near the first water outlet, the second liquid outlet channel is connected to the first intermediate channel through the first water outlet and the second water outlet; the second water outlet is perpendicular to the heat exchange plate.

[0014] In some embodiments, more than two second liquid inlet channels are provided along the second direction, the second liquid outlet channels are provided in one-to-one correspondence with the second liquid inlet channels, the liquid collecting tank also includes a third joint connected to the second sub-cavity, the third joint is provided in one-to-one correspondence with the second liquid inlet channels, and the second liquid inlet channels are connected to the third joint through a guide tube.

[0015] In a second aspect, an embodiment of the present application provides a battery pack comprising the above-mentioned heat exchange assembly.

[0016] The heat exchange assembly and battery pack of the embodiments of the present application, wherein the heat exchange assembly includes a first heat exchange plate, a second heat exchange plate and a liquid collecting tank, wherein the first heat exchange plate includes a first liquid inlet channel, a first intermediate channel and a first liquid outlet channel connected in sequence, the second heat exchange plate includes a second liquid inlet channel, a second intermediate channel and a second liquid outlet channel connected in sequence, one of the first heat exchange plate and the second heat exchange plate is used to be installed to the bottom of the battery module, and the other is used to be installed to the top of the battery module, the liquid collecting tank includes a first chamber and a second chamber, the first chamber is used to input heat exchange medium, and the second chamber is used to output heat exchange medium, one of the first chamber and the second chamber is simultaneously connected to the first liquid inlet channel and the second liquid inlet channel, the other is connected to the first liquid outlet channel, and the second liquid outlet channel is connected to the first intermediate channel or the first liquid outlet channel. By providing a first heat exchange plate and a second heat exchange plate to form a double-layer heat exchange structure, the heat exchange efficiency of the entire heat exchange component can be improved, so that the battery can better adapt to high-power application scenarios such as fast charging and discharging; by providing a liquid collecting tank, it is only necessary to connect the first chamber and the second chamber to the external liquid circuit respectively to form a circulation of the heat exchange medium, which can simplify the number of connection positions between the entire heat exchange component and the external liquid circuit, thereby improving the assembly efficiency of the entire heat exchange component and peripheral parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 A schematic diagram of the structure of a heat exchange assembly provided in an embodiment of the present application;

[0019] Figure 2A schematic diagram of the structure of a liquid collecting tank provided in an embodiment of the present application;

[0020] Figure 3 A schematic diagram of the internal structure of the first chamber provided in an embodiment of the present application;

[0021] Figure 4 A schematic diagram of the internal structure of the second chamber provided in an embodiment of the present application;

[0022] Figure 5 A schematic diagram of the internal structure of the first chamber and the second chamber from another perspective provided in an embodiment of the present application;

[0023] Figure 6 A schematic diagram of the structure of the first heat exchange plate provided in an embodiment of the present application;

[0024] Figure 7 A schematic diagram of the structure of the second heat exchange plate provided in an embodiment of the present application;

[0025] Figure 8 A schematic diagram of the exploded structure of a battery pack provided in an embodiment of the present application.

[0026] In the figure: 1. first heat exchange plate; 101. second water inlet; 102. cover body; 103. plate body; 104. first liquid inlet channel; 105. first liquid outlet channel; 106. first intermediate channel; 2. second heat exchange plate; 201. second liquid inlet channel; 202. second intermediate channel; 203. second liquid outlet channel; 204. first water inlet; 205. flow guide tube; 3. liquid collecting box; 301. first joint; 302. second joint; 303. third joint; 304. water distribution pipe; 305. second partition; 306. first cavity; 307. first chamber; 3071. second sub-cavity; 3072. first sub-cavity; 308. second chamber; 309. second cavity; 310. first partition; 4. thermally conductive insulating strip; 5. battery module; 6. pole ear; 7. conductive connector; 8. thermally conductive insulating pad. DETAILED DESCRIPTION

[0027] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0029] At present, the heat management method of the battery pack is mainly to lay a heat exchange plate at the bottom of the battery module, and use the heat exchange medium inside the heat exchange plate to transfer the heat of the battery away from the battery pack, thereby achieving heat dissipation of the battery module. The inventor of this application found that for high-power application scenarios such as fast charging and discharging of batteries, the current battery pack heat management method is difficult to achieve a good heat dissipation effect.

[0030] In order to solve the problems in the prior art, the present application provides a heat exchange component and a battery pack, which are described in detail below in conjunction with the accompanying drawings.

[0031] Figure 1 A schematic diagram of the structure of a heat exchange assembly provided in an embodiment of the present application; Figure 2 A schematic diagram of the structure of a liquid collecting tank provided in an embodiment of the present application; Figure 3 A schematic diagram of the internal structure of the first chamber provided in an embodiment of the present application; Figure 4 A schematic diagram of the internal structure of the second chamber provided in an embodiment of the present application;

[0032] Figure 5 A schematic diagram of the internal structure of the first chamber and the second chamber from another perspective provided in an embodiment of the present application; Figure 6 A schematic diagram of the structure of the first heat exchange plate provided in an embodiment of the present application; Figure 7 A schematic diagram of the structure of the second heat exchange plate provided in an embodiment of the present application.

[0033] See also Figures 1 to 7The embodiment of the present application provides a heat exchange assembly, including a first heat exchange plate 1, a second heat exchange plate 2 and a liquid collecting box 3, wherein the first heat exchange plate 1 includes a first liquid inlet channel 104, a first intermediate channel 106 and a first liquid outlet channel 105 connected in sequence, and the plate surface of the first heat exchange plate 1 is perpendicular to the first direction; the second heat exchange plate 2 includes a second liquid inlet channel 201, a second intermediate channel 202 and a second liquid outlet channel 203 connected in sequence, and the second heat exchange plate 2 is arranged at intervals with the first heat exchange plate 1 along the first direction, and one of the first heat exchange plate 1 and the second heat exchange plate 2 is used to be installed at the bottom of the battery module 5, and the other One is used to be installed on the top of the battery module 5; the liquid collecting tank 3 includes a first chamber 307 and a second chamber 308, the first chamber 307 is used to input heat exchange medium from an external liquid circuit, and the second chamber 308 is used to output heat exchange medium to an external liquid circuit. A first partition plate 310 is provided between the first chamber 307 and the second chamber 308, one of the first chamber 307 and the second chamber 308 is simultaneously connected to the first liquid inlet channel 104 and the second liquid inlet channel 201, and the other is connected to the first liquid outlet channel 105, and the second liquid outlet channel 203 is connected to the first intermediate channel 106 or the first liquid outlet channel 105.

[0034] Specifically, in this embodiment, the first chamber 307 is connected to the first liquid inlet channel 104 and the second liquid inlet channel 201 at the same time, and the second chamber 308 is connected to the first liquid outlet channel 105. A portion of the heat exchange medium input into the first chamber 307 from the external liquid path flows through the first liquid inlet channel 104, the first intermediate channel 106 and the first liquid outlet channel 105, and enters the second chamber 308, and is output to the external liquid path through the second chamber 308; another portion flows through the second liquid inlet channel 201, the second intermediate channel 202, and the second liquid outlet channel 203, and enters the second chamber 308 through the first intermediate channel 106 and the first liquid outlet channel 105, or only through the first liquid outlet channel 105, and is output to the external liquid path through the second chamber 308. In the process of the heat exchange medium flowing through the first heat exchange plate 1 and the second heat exchange plate 2, due to the temperature difference between the heat exchange medium and the battery module 5, heat exchange with the battery module 5 can be achieved, thereby achieving a heat exchange effect.

[0035] By providing the first heat exchange plate 1 and the second heat exchange plate 2 to form a double-layer heat exchange structure, the heat exchange efficiency of the heat exchange component as a whole can be improved, so that the battery can better adapt to high-power application scenarios such as fast charging and discharging; in addition, when the second liquid outlet channel 203 is connected to the first intermediate channel 106, the heat exchange medium flowing out of the second liquid outlet channel 203 will be relatively increased after the heat exchange medium flowing through the corresponding first intermediate channel 106 and the first liquid outlet channel 105 is merged, thereby improving the heat exchange efficiency of the corresponding area of ​​the first heat exchange plate 1; by providing the collecting tank 3, it is only necessary to connect the first chamber 307 and the second chamber 308 to the external liquid circuit respectively to form a circulation of the heat exchange medium, which can simplify the number of connection positions between the heat exchange component as a whole and the external liquid circuit, thereby improving the assembly efficiency of the heat exchange component as a whole and the surrounding parts.

[0036] In some embodiments, the first chamber 307 includes a first sub-chamber 3072, a second sub-chamber 3071 and a flow-dividing structure, the first liquid inlet channel 104 is connected to the first sub-chamber 3072; the second liquid inlet channel 201 is connected to the second sub-chamber 3071, and a second partition plate 305 is provided between the first sub-chamber 3072 and the second sub-chamber 3071; the flow-dividing structure is provided in the first chamber 307 near the liquid inlet of the first chamber 307, and the flow-dividing structure is used to divert the heat exchange medium input from the liquid inlet to the first sub-chamber 3072 and the second sub-chamber 3071. By diverting the heat exchange medium input into the first chamber 307 through the flow-dividing structure, the flow ratio of the heat exchange medium entering the first sub-chamber 3072 and the second sub-chamber 3071 can be controlled, thereby controlling the flow of the heat exchange medium entering the first heat exchange plate 1 and the second heat exchange plate 2, and finally controlling the heat exchange efficiency of the first heat exchange plate 1 and the second heat exchange plate 2. Designers can design a specific flow distribution structure based on this, so that both the first heat exchange plate 1 and the second heat exchange plate 2 can meet the predetermined heat dissipation requirements.

[0037] In some embodiments, along the first direction, the first sub-cavity 3072 is located closer to the first heat exchange plate 1 relative to the second sub-cavity 3071, which facilitates the communication between the first sub-cavity 3072 and the first heat exchange plate 1 and simplifies the overall structure of the heat exchange assembly.

[0038] In some embodiments, the diversion structure includes a water diversion pipe 304 fixedly connected to the second partition plate 305, one end of the water diversion pipe 304 is connected to the first sub-chamber 3072, and the other end of the water diversion pipe 304 is located near the liquid inlet. A gap is provided between the water diversion pipe 304 and the liquid inlet. During the preliminary design, the flow ratio of the heat exchange medium entering the first sub-chamber 3072 and the second sub-chamber 3071 can be adjusted by adjusting the ratio of the inner diameter of the water diversion pipe 304 to the inner diameter of the first joint 301.

[0039] In some embodiments, the first heat exchange plate 1 includes a plate body 103 and a cover body 102, the first liquid inlet channel 104, the first intermediate channel 106 and the first liquid outlet channel 105 are all arranged on the side of the plate body 103 close to the second heat exchange plate 2; the cover body 102 covers the side of the plate body 103 close to the second heat exchange plate 2, and the liquid collecting box 3 is welded to the side of the cover body 102 close to the second heat exchange plate 2. The first heat exchange plate 1 composed of the plate body 103 and the cover body 102 has a relatively balanced heat exchange capacity at various locations of the cover body 102, so it can ensure that the temperature at various locations at the bottom of the battery module 5 has a high consistency.

[0040] In some embodiments, the side of the liquid collecting box 3 facing the cover body 102 is provided with a first cavity 306 and a second cavity 309, the cover body 102 is provided with a first through hole connected to the first liquid inlet channel 104, one end of the first cavity 306 is connected to the first sub-cavity 3072, and the other end of the first cavity 306 is connected to the first liquid inlet channel 104 through the first through hole; the cover body 102 is provided with a second through hole connected to the first liquid outlet channel 105, one end of the second cavity 309 is connected to the second chamber 308, and the other end of the second cavity 309 is connected to the first liquid outlet channel 105 through the second through hole. By providing the first cavity 306, the second cavity 309, the first through hole and the second through hole, when the liquid collecting box 3 is directly welded to the cover body 102, the communication between the first sub-cavity 3072 and the first liquid inlet channel 104 and the communication between the second chamber 308 and the first liquid outlet channel 105 can be completed at the same time, which can simplify the overall structure of the heat exchange component and improve the integration. It should be noted that in Figure 1 , Figure 6 and Figure 8 In the perspective of FIG. 1 , since both the first through hole and the second through hole are blocked by the liquid collecting tank 3, the first through hole and the second through hole are not shown.

[0041] In some embodiments, a plurality of first liquid inlet channels 104 and first liquid outlet channels 105 are provided, one of the first liquid inlet channels 104 and the first liquid outlet channels 105 is connected to the other through at least one first intermediate channel 106, the first cavity 306 is provided in one-to-one correspondence with the first liquid inlet channels 104, and the second cavity 309 is provided in one-to-one correspondence with the first liquid outlet channels 105. Compared with a heat exchange plate with a single-inlet and single-outlet structure formed by only one first liquid inlet channel 104 and one first liquid outlet channel 105, under the premise of achieving the same heat dissipation capacity, the heat exchange medium has a multi-inlet and multi-outlet structure, and the flow of each first intermediate channel 106 is shorter, which can simplify the structure of the heat exchange medium flow channel inside the first heat exchange plate 1 and reduce the internal pressure drop loss.

[0042] In some embodiments, the liquid collecting tank 3 also includes a first joint 301 and a second joint 302, the first joint 301 is connected to the first chamber 307, and one end of the first joint 301 close to the first chamber 307 is fixedly connected to the liquid inlet, and the first joint 301 inputs heat exchange medium to the first chamber 307 through the liquid inlet; the second joint 302 is connected to the liquid outlet of the second chamber 308, and one end of the second joint 302 close to the second chamber 308 is fixedly connected to the liquid outlet, and the second joint 302 outputs the heat exchange medium in the second chamber 308 through the liquid outlet.

[0043] In some embodiments, the second liquid inlet channel 201, the second intermediate channel 202, and the second liquid outlet channel 203 are all tubular structures, and a plurality of second intermediate channels 202 are spaced apart along the second direction, the second direction is perpendicular to the first direction, and the side of the second intermediate channel 202 facing the battery module 5 is used to be attached to the conductive connector 7 of the battery module 5. The heat dissipation area on the top of the battery is mainly concentrated at the welding position of the conductive connector 7 and the tab 6. The second intermediate channel 202 with a tubular structure can dissipate heat in a targeted manner in the corresponding area, and can achieve a better heat dissipation effect.

[0044] In some embodiments, the width of the second intermediate flow channel 202 is greater than or equal to the diameter of the pole ear 6, so that the heat exchange component as a whole can achieve a better heat exchange effect.

[0045] In some embodiments, the liquid collecting box 3, the second liquid inlet channel 201, the second intermediate channel 202 and the second liquid outlet channel 203 are successively distributed along the third direction, and the third direction is perpendicular to the first direction and the second direction at the same time. The second liquid outlet channel 203 is provided with a first water inlet 204, and the first heat exchange plate 1 is provided with a second water inlet 101 near the first water inlet 204. The second liquid outlet channel 203 is connected to the first intermediate channel 106 through the first water inlet 204 and the second water inlet 101. By setting the first water inlet 204 and the second water inlet 101, the heat exchange medium flowing through the second liquid outlet channel 203 can flow back to the second chamber 308 by means of the first intermediate channel 106 and the first liquid outlet channel 105, so that the overall structure of the heat exchange component is simpler. It should be noted that the first water inlet 204 and the second water inlet 101 can be a cylindrical tube structure in the form of a protrusion, or an opening structure in the form of a hole groove. When the first water inlet 204 and the second water inlet 101 are both protruding cylindrical tube structures, the first water inlet 204 and the second water inlet 101 can be connected by direct plug-in, and the gap between the first water inlet 204 and the second water inlet 101 can be sealed by welding or sealant; when the first water inlet 204 and the second water inlet 101 are both opening structures in the form of hole grooves, corresponding pipelines can be connected between the first water inlet 204 and the second water inlet 101 to connect the first water inlet 204 with the second water inlet 101.

[0046] The second water inlet 101 is perpendicular to the heat exchange plate. By limiting the direction of the second water inlet 101, the heat exchange medium converges by jet impact, which can enhance the heat exchange effect downstream of the first water inlet 204 and further improve the overall heat exchange effect of the heat exchange component.

[0047] In some embodiments, more than two second liquid inlet channels 201 are provided along the second direction, and the second liquid outlet channels 203 are provided in one-to-one correspondence with the second liquid inlet channels 201. The liquid collecting box 3 also includes a third joint 303 connected to the second sub-cavity 3071, and the third joint 303 is provided in one-to-one correspondence with the second liquid inlet channel 201. The second liquid inlet channel 201 is connected to the third joint 303 through the guide tube 205. Since the channels of the second heat exchange plate 2 are tubular structures, the second intermediate channel 202 needs to be attached to the corresponding conductive connector 7 to achieve a higher heat dissipation effect. Through the above design, the tolerance accuracy of the second heat exchange plate 2 can be redundantly installed, thereby improving the operability of the actual installation of the second heat exchange plate 2 and the feasibility of subsequent maintenance.

[0048] In some embodiments, the first connector 301 , the second connector 302 , and the third connector 303 are all quick-release structures for easy assembly.

[0049] Figure 8 A schematic diagram of the exploded structure of a battery pack provided in an embodiment of the present application.

[0050] like Figure 8 As shown, an embodiment of the present application further provides a battery pack, including the heat exchange assembly in the above embodiment. Specifically, in the present embodiment, the battery pack also includes a battery module 5 located between the first heat exchange plate 1 and the second heat exchange plate 2, the bottom of the battery module 5 is pressed against the cover plate of the first heat exchange plate 1 through a thermally conductive insulating pad 8, and the top tabs 6 of the battery module 5 are connected in series and parallel through a conductive connector 7, and each conductive connector 7 is pressed against the corresponding second intermediate flow channel 202 through a thermally conductive insulating strip 4 at a corresponding position. Among them, the conductive connector 7 can be made of aluminum bar, copper bar, etc. It should be noted that since the battery pack includes the heat exchange assembly in the above embodiment, it has at least all the beneficial effects brought about by the above embodiment, which will not be repeated here one by one.

[0051] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A heat exchange component, characterized in that: include: A first heat exchange plate, comprising a first liquid inlet channel, a first intermediate channel and a first liquid outlet channel connected in sequence, wherein a plate surface of the first heat exchange plate is perpendicular to a first direction; A second heat exchange plate, comprising a second liquid inlet channel, a second intermediate channel and a second liquid outlet channel which are connected in sequence, the second heat exchange plate and the first heat exchange plate are arranged at intervals along the first direction, one of the first heat exchange plate and the second heat exchange plate is used to be installed at the bottom of the battery module, and the other is used to be installed at the top of the battery module; A liquid collecting tank comprises a first chamber and a second chamber, wherein the first chamber is used to input a heat exchange medium, and the second chamber is used to output a heat exchange medium, and a first partition is provided between the first chamber and the second chamber, and one of the first chamber and the second chamber is simultaneously connected to the first liquid inlet channel and the second liquid inlet channel, and the other is connected to the first liquid outlet channel, and the second liquid outlet channel is connected to the first intermediate channel or the first liquid outlet channel.

2. The heat exchange assembly according to claim 1, characterized in that: The first chamber is connected to the first liquid inlet channel and the second liquid inlet channel at the same time, and the first chamber includes: a first sub-chamber, wherein the first liquid inlet channel is connected to the first sub-chamber; a second sub-cavity, wherein the second liquid inlet channel is connected to the second sub-cavity, and a second partition plate is provided between the first sub-cavity and the second sub-cavity; The flow-dividing structure is arranged in the first chamber at a position close to the liquid inlet of the first chamber, and is used to divert the heat exchange medium input from the liquid inlet to the first sub-chamber and the second sub-chamber.

3. The heat exchange assembly according to claim 2, characterized in that: Along the first direction, the first sub-cavity is located close to the first heat exchange plate relative to the second sub-cavity; The flow distribution structure includes a water distribution pipe fixedly connected to the second partition plate, one end of the water distribution pipe is connected to the first sub-cavity, the other end of the water distribution pipe is located near the liquid inlet, and a gap is provided between the water distribution pipe and the liquid inlet.

4. The heat exchange assembly according to claim 2, characterized in that: The first heat exchange plate comprises: a plate body, the first liquid inlet flow channel, the first intermediate flow channel and the first liquid outlet flow channel are all arranged on a side of the plate body close to the second heat exchange plate; a cover body, covering a side of the plate body close to the second heat exchange plate, and the liquid collecting box is welded to a side of the cover body close to the second heat exchange plate; The side of the liquid collecting box facing the cover body is provided with: a first cavity, the cover body is provided with a first through hole connected with the first liquid inlet channel, one end of the first cavity is connected with the first sub-cavity, and the other end of the first cavity is connected with the first liquid inlet channel through the first through hole; a second cavity, the cover body is provided with a second through hole connected with the first liquid outlet channel, one end of the second cavity is connected with the second chamber, and the other end of the second cavity is connected with the first liquid outlet channel through the second through hole.

5. The heat exchange assembly according to claim 4, characterized in that: The first liquid inlet channel and the first liquid outlet channel are both provided with a plurality, one of the first liquid inlet channel and the first liquid outlet channel is connected to the other through at least one first intermediate channel, the first cavity channel is provided in a one-to-one correspondence with the first liquid inlet channel, and the second cavity channel is provided in a one-to-one correspondence with the first liquid outlet channel.

6. The heat exchange assembly according to claim 2, characterized in that: The liquid collecting tank also includes: A first joint, connected to the first chamber, wherein one end of the first joint close to the first chamber is fixedly connected to the liquid inlet, and the first joint inputs heat exchange medium into the first chamber through the liquid inlet; The second joint is connected to the liquid outlet of the second chamber. One end of the second joint close to the second chamber is fixedly connected to the liquid outlet. The second joint outputs the heat exchange medium in the second chamber through the liquid outlet.

7. The heat exchange assembly according to claim 2, characterized in that: The second liquid inlet channel, the second intermediate channel and the second liquid outlet channel are all tubular structures, and multiple second intermediate channels are spaced apart along a second direction, the second direction is perpendicular to the first direction, and the side of the second intermediate channel facing the battery module is used to stick to the conductive connector of the battery module.

8. The heat exchange assembly according to claim 7, characterized in that: The liquid collecting tank, the second liquid inlet channel, the second intermediate channel and the second liquid outlet channel are successively distributed along a third direction, and the third direction is perpendicular to both the first direction and the second direction. The second liquid outlet channel is provided with a first water outlet, and the first heat exchange plate is provided with a second water outlet near the first water outlet. The second liquid outlet channel is connected to the first intermediate channel through the first water outlet and the second water outlet; the second water outlet is perpendicular to the heat exchange plate.

9. The heat exchange assembly according to claim 7, characterized in that: Along the second direction, more than two second liquid inlet channels are arranged, and the second liquid outlet channels are arranged in a one-to-one correspondence with the second liquid inlet channels. The liquid collecting tank also includes a third joint connected to the second sub-cavity, and the third joint is arranged in a one-to-one correspondence with the second liquid inlet channel. The second liquid inlet channel is connected to the third joint through a guide tube.

10. A battery pack, characterized in that: The heat exchange component comprises the heat exchange component as described in any one of claims 1 to 9.

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