Heat exchange system and battery pack

Abstract

The application discloses a heat exchange system and a battery pack. The heat exchange system comprises a bottom heat exchange plate, a side heat exchange plate and a pipeline assembly. The bottom heat exchange plate is attached to the bottom surface of the battery pack, and the side heat exchange plate is attached to the side surface of the adjacent battery pack to cool the battery pack. The pipeline assembly comprises a liquid inlet main pipeline and at least two liquid inlet branches. The two liquid inlet branches are connected in parallel. The side heat exchange plate can be divided into at least two groups of side heat exchange groups. Each group of the side heat exchange groups is connected to one liquid inlet branch. The liquid inlet branches are connected to the side heat exchange plates of the corresponding side heat exchange groups in parallel, so that the heat exchange medium can flow into each group of the side heat exchange groups synchronously. The uniformity of the heat exchange medium flow among the side heat exchange plates is improved, and the cooling effect of the heat exchange system is improved.

Description

Technical Field

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

[0002] In existing technologies, heat exchange systems are used to cool battery packs. These systems typically include bottom heat exchange plates and side heat exchange plates to cool the bottom and sides of the battery pack. However, because the bottom heat exchange plate has many openings, its heat exchange area with the battery pack is relatively small, and the cooling effect mainly relies on the side heat exchange plates. However, since the side heat exchange plates are distributed sequentially along the distribution direction of the battery pack, the flow uniformity of the heat exchange medium among the multiple side heat exchange plates is poor, resulting in a poor cooling effect of the heat exchange system on the battery pack.

[0003] In summary, improving the flow uniformity of the heat exchange medium and enhancing the cooling effect of the heat exchange system are problems that urgently need to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a heat exchange system and battery pack that improves the flow uniformity of the heat exchange medium and enhances the cooling effect of the heat exchange system.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A heat exchange system for heat exchange of a battery pack includes: a bottom heat exchange plate, side heat exchange plates, and a piping assembly; wherein the bottom heat exchange plate is attached to the bottom surface of the battery pack; there are multiple battery packs, and multiple side heat exchange plates are located between adjacent battery packs, with both sides of the side heat exchange plates attached to the sides of the battery packs; the piping assembly includes a main liquid inlet pipeline, which connects to at least two liquid inlet branches, which are connected in parallel; the multiple side heat exchange plates are divided into at least two groups of side heat exchange plates, and each group of side heat exchange plates connects to one of the liquid inlet branches.

[0007] The heat exchange system provided in this application includes a bottom heat exchange plate, side heat exchange plates, and a piping assembly. The bottom heat exchange plate is attached to the bottom surface of the battery pack, and the side heat exchange plates are attached to the sides of adjacent battery packs to cool the battery packs. The piping assembly includes a liquid inlet main pipeline with at least two liquid inlet branches connected in parallel. There are multiple battery packs and side heat exchange plates, so that the side heat exchange plates can be divided into at least two groups of side heat exchange plates. Each group of side heat exchange plates is connected to one of the liquid inlet branches. In this way, the parallel liquid inlet branches are connected to the side heat exchange plates of the corresponding side heat exchange groups, so that the heat exchange medium can flow into each group of side heat exchange plates synchronously, improving the uniformity of the heat exchange medium flow between the side heat exchange plates and improving the cooling effect of the heat exchange system. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0009] Figure 1 This is a schematic diagram of the heat exchange system provided in an embodiment of this application;

[0010] Figure 2 for Figure 1 The top view of the heat exchange system shown;

[0011] Figure 3 for Figure 1 The diagram shows a front view of the heat exchange system.

[0012] Figure 4 This is a schematic diagram of the battery pack provided in an embodiment of this application.

[0013] Explanation of reference numerals in the attached figures:

[0014] 100-battery pack;

[0015] 200-Bottom heat exchange plate;

[0016] 300 - Side heat exchange plate; 301 - Clearance groove; 310 - First side heat exchange group; 320 - Second side heat exchange group.

[0017] 410-Main inlet pipe, 411-First inlet branch, 412-Second inlet branch, 4121-First straight section, 4122-Connecting section, 4123-Second straight section, 420-Main outlet pipe, 421-Outlet branch;

[0018] 510 - Liquid inlet, 520 - Liquid outlet;

[0019] 610 - First adapter block, 620 - Second adapter block, 630 - Third adapter block. Detailed Implementation

[0020] 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.

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The terminology used in the following embodiments is for the purpose of describing specific embodiments only and is not intended to be a limitation of this application. As used in the specification and appended claims of this application, the singular expressions "a," "an," "the," "the," "the," and "this" are intended to also include expressions such as "one or more," unless the context clearly indicates otherwise. It should also be understood that in the embodiments of this application, "one or more" refers to one, two, or more; "and / or" describes the relationship between related objects, indicating that three relationships may exist; for example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0022] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0023] The "multiple" mentioned in the embodiments of this application refers to two or more. It should be noted that in the description of the embodiments of this application, terms such as "first" and "second" are used only for the purpose of distinguishing descriptions and should not be construed as indicating or implying relative importance, nor should they be construed as indicating or implying order.

[0024] The terms "parallel" and "perpendicular" used in this application refer to "basically parallel" and "basically perpendicular" in practical operation. "Basically parallel" can be understood as parallelism with a certain degree of error, and similarly, "basically perpendicular" can be understood as perpendicularity with a certain degree of error.

[0025] like Figure 1 As shown in the embodiment of this application, the heat exchange system is used to exchange heat with the battery pack 100. The heat exchange system includes a bottom heat exchange plate 200, side heat exchange plates 300, and piping components. The bottom heat exchange plate 200 is attached to the bottom surface of the battery pack 100 to cool it down through heat exchange with the bottom surface of the battery pack 100. There are multiple battery packs 100, and multiple side heat exchange plates 300. The side heat exchange plates 300 are located between adjacent battery packs 100, and both sides of the side heat exchange plates 300 are attached to the sides of the battery pack 100, that is, the sides of the side heat exchange plates 300 are opposite to the sides of the battery pack 100, and the two are connected by a conductive... The thermal structural adhesive is used to bond the components together to cool the side heat exchange of the battery pack 100. The piping assembly includes a liquid inlet main pipeline 410, which connects to at least two liquid inlet branches, and the at least two liquid inlet branches are connected in parallel. All the side heat exchange plates 300 can be divided into at least two groups of side heat exchange groups, and each group of side heat exchange groups is connected to a liquid inlet branch. In this way, the parallel liquid inlet branches are connected to the side heat exchange plates 300 in the corresponding side heat exchange groups, so that the heat exchange medium can flow into each group of side heat exchange groups synchronously, which improves the uniformity of the heat exchange medium flow between the side heat exchange plates 300 and improves the cooling effect of the heat exchange system.

[0026] In this application, the piping assembly also includes a bottom liquid inlet pipe, which is connected to the bottom heat exchange plate 200. The flow rate in the liquid inlet pipe 410 connected to the side heat exchange plate 300 is A, and the flow rate in the bottom liquid inlet pipe of the bottom heat exchange plate 200 is B. The ratio of A / B is 0.8-2. If the ratio of A / B is too small, the heat exchange effect of the side heat exchange plate 300 will be poor. If the ratio is too large, the heat exchange effect of the bottom heat exchange plate 200 will be poor. Therefore, A / B is 0.8-2. For example, A / B can be 0.8, 0.9, 1.0, 1.1, or 1.2 to ensure the heat exchange effect of the side heat exchange plate 300 and the bottom heat exchange plate 200 on the battery pack 100 in various aspects.

[0027] In this application, the number of side heat exchange plates 300 in each side heat exchange group is 2-6. For example, each side heat exchange group may include 2, 3, 4, 5 or 6 side heat exchange plates 300, which can be selected according to actual needs. This application embodiment does not limit this.

[0028] In some embodiments, the number of side heat exchange plates 300 included in different groups of side heat exchange groups is the same to ensure the heat exchange effect of different side heat exchange groups on the battery pack.

[0029] In some other embodiments, the number of side heat exchange plates 300 included in different groups of side heat exchange groups is different, and the difference in the number of side heat exchange plates 300 in different groups of side heat exchange groups is 1-3, for example, the difference can be 1, 2 or 3. This application embodiment does not limit this.

[0030] When the number of side heat exchange plates 300 included in different groups of side heat exchange groups is different, the side heat exchange group at the end away from the liquid inlet main pipeline 410 includes fewer side heat exchange plates 300 in order to further balance the heat exchange effect between different side heat exchange groups.

[0031] In this application, along the length of the side heat exchange plate 300, the distance between the liquid inlet branch and the side of the battery pack 100 is 5mm-30mm. For example, the distance between the liquid inlet branch and the battery pack 100 can be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 2... The distance between the liquid inlet branch and the side of the battery pack 100 is set to 5mm-30mm, which is one of the following: 6mm, 27mm, 28mm, 29mm, and 30mm. If the distance is too small, the liquid inlet branch will exchange too much heat with the battery pack 100 before reaching the corresponding side heat exchange group, affecting the temperature of the heat exchange medium in the liquid inlet branch. If the distance is too large, the liquid inlet branch will occupy too much space, affecting the space utilization rate. The distance between the liquid inlet branch and the side of the battery pack 100 is set to 5mm-30mm to ensure the heat exchange quality of the heat exchange medium and improve the space utilization rate.

[0032] In this application, the distance between the lower edge of the side heat exchange plate 300 and the bottom heat exchange plate 200 in the height direction is 3mm-50mm, preferably 5mm-15mm. For example, the distance between the lower edge of the side heat exchange plate 300 and the bottom heat exchange plate 200 can be 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm, 31mm, 32mm, 33mm, 34mm, 35mm. The distance between the side heat exchange plate 300 and the bottom heat exchange plate 200 is set to 3mm-50mm, preferably 5mm-15mm, to ensure both heat exchange efficiency and temperature consistency of the battery pack 100. The distance between the side heat exchange plate 300 and the bottom heat exchange plate 200 is set to 3mm-50mm, preferably 5mm-15mm, to ensure both heat exchange efficiency and temperature consistency of the battery pack 100. It should be noted that the height direction is as follows... Figure 3 The third party shown.

[0033] like Figure 1 As shown, the piping assembly also includes a liquid outlet main pipeline 420, which is connected to a liquid outlet branch 421, so that all side heat exchange plates 300 in at least two sets of side heat exchange groups are connected and converge to the liquid outlet branch 421, and the heat exchange medium is discharged through the same liquid outlet branch 421, reducing the space occupied by the liquid outlet branch 421.

[0034] In this application, the pipeline assembly also includes a bottom liquid outlet pipeline, and the bottom heat exchange plate 200 is connected to a bottom liquid inlet pipeline and a bottom liquid outlet pipeline, so as to realize the heat exchange medium flowing in the bottom heat exchange plate 200 to exchange heat and cool down the battery pack 100.

[0035] In this application, several battery packs 100 are distributed sequentially along a first direction, and side heat exchange plates 300 are also distributed sequentially along the first direction. The length direction of the side heat exchange plates 300 extends along a second direction so that the side heat exchange plates 300 and the battery packs 100 are interleaved to ensure the cooling effect of the side heat exchange plates 300.

[0036] like Figure 2As shown, the side heat exchange plate 300 can be divided into at least two groups of side heat exchange groups along the first direction, and the first direction and the second direction are arranged perpendicularly in this application, so that the space occupied by the entire heat exchange system is more concentrated and the integration is improved.

[0037] In this application, each side heat exchange group includes at least two side heat exchange plates 300 to improve the flow efficiency of the heat exchange medium in the liquid inlet branch and improve the cooling efficiency of the battery pack 100.

[0038] For example, such as Figure 2 As shown, it can be divided into two groups of side heat exchange groups, each of which includes four side heat exchange plates 300 to improve the flow efficiency of the heat exchange medium.

[0039] In other embodiments, the side heat exchange groups can be divided into three, four, or more groups. Each side heat exchange group can include two, three, five, or more side heat exchange plates 300, which can be selected according to the actual situation. This application embodiment does not limit this.

[0040] like Figure 2 As shown, the side heat exchange group includes a first side heat exchange group 310 and a second side heat exchange group 320. The corresponding liquid inlet branches include a first liquid inlet branch 411 and a second liquid inlet branch 412, such that the first liquid inlet branch 411 connects to the first side heat exchange group 310 and the second liquid inlet branch 412 connects to the second side heat exchange group 320, so as to realize the parallel connection between the first side heat exchange group 310 and the second side heat exchange group 320, thereby improving the uniformity of heat exchange medium flow and improving the heat exchange effect.

[0041] It should be noted that, as Figure 1 As shown, the first liquid inlet branch 411 includes segmented pipelines that are connected one-to-one with the side heat exchange plates 300 in the multiple first side heat exchange groups 310. The multiple segmented pipelines are connected in series. Each side heat exchange plate 300 is provided with a liquid inlet and a liquid outlet. The liquid inlet is connected to the corresponding segmented pipeline so that the heat exchange medium can flow into each side heat exchange plate 300 to achieve uniform heat exchange and cooling of the battery pack 100.

[0042] In this application, such as Figure 1 As shown, the segmented pipelines between two adjacent side heat exchange plates 300 in the first liquid inlet branch 411 are all telescopic pipes, so as to provide the battery pack 100 with the contraction and expansion generated during actual operation, and to adapt to the change in the distance between adjacent battery packs 100, so as to ensure the normal operation of the heat exchange system.

[0043] It should be noted that, as Figure 1As shown, the second liquid inlet branch 412 includes segmented pipelines that are connected one-to-one with the side heat exchange plates 300 in the multiple first side heat exchange groups 310. The multiple segmented pipelines are connected in series. Each side heat exchange plate 300 is provided with a liquid inlet and a liquid outlet. The liquid inlet is connected to the corresponding segmented pipeline so that the heat exchange medium can flow into each side heat exchange plate 300 to achieve uniform heat exchange and cooling of the battery pack 100.

[0044] In this application, such as Figure 1 As shown, the segmented pipelines between two adjacent side heat exchange plates 300 in the second liquid inlet branch 411 are all telescopic pipes. Specifically, the second straight section 4123 and the connecting section 4122 in the second liquid inlet branch 411 mentioned below are both telescopic pipes. The telescopic pipes provide the capacity for the contraction and expansion of the battery pack 100 during actual operation, and adapt to the changes in the distance between adjacent battery packs 100 to ensure the normal operation of the heat exchange system.

[0045] like Figure 2 As shown, the first liquid inlet branch 411 and the second liquid inlet branch 412 both extend along the first direction, so that the extension direction is consistent with the distribution direction of the side heat exchange plate 300, so that the first liquid inlet branch 411 and the second liquid inlet branch 412 can be connected to the side heat exchange plate 300 respectively. Moreover, the first liquid inlet branch 411, the second liquid inlet branch 412 and the liquid outlet branch 421 are all located on the same side of the side heat exchange plate 300, so that the pipeline distribution is more concentrated, reducing the space occupied by the heat exchange system in the battery pack and improving the integration of the battery pack.

[0046] like Figure 3 As shown, the first liquid inlet branch 411 is a straight structure, and the liquid outlet branch 421 is also a straight structure; the second liquid inlet branch 412 includes a first straight segment 4121, a connecting end 4122, and a second straight segment 4123 connected in sequence.

[0047] In the region of the first side heat exchange group 310, the first liquid inlet branch 411, the first straight section 4121, and the liquid outlet branch 421 are distributed sequentially along the third direction, so that the first liquid inlet branch 411 can connect to the side heat exchange plate 300 in the first side heat exchange group 310, and the side heat exchange plate 300 in the first side heat exchange group 310 can connect to the liquid outlet branch 421 to realize the flow of heat exchange medium.

[0048] In the region of the second side heat exchange group 320, the second straight section 4123 and the liquid outlet branch 421 are distributed sequentially along the third direction, so that the heat exchange medium flows to the second straight section 4123, so that the first side heat exchange group 310 and the second side heat exchange group 320 are connected in parallel, so that the second straight section 4123 can connect to the side heat exchange plate 300 in the second side heat exchange group 320, and so that the side heat exchange plate 300 in the second side heat exchange group 310 can connect to the liquid outlet branch 421 to realize the flow of the heat exchange medium.

[0049] And, as Figure 3 As shown, the first liquid inlet branch 411 is flush with the second straight section 4123 so that the second straight section 4123 can connect to the liquid inlet of the side heat exchange plate 300, thereby ensuring the flow area of ​​the heat exchange medium in the side heat exchange plate 300 and further ensuring the heat dissipation effect on the battery pack 100.

[0050] It should be noted that the first, second, and third directions are perpendicular to each other, and the third direction is usually the height direction, to ensure the flow process of the heat exchange medium.

[0051] like Figure 1 As shown, a clearance groove 301 is provided at one end of the side heat exchange plate 300 in the first side heat exchange group 310. The clearance groove 301 makes way for the first straight segment 4121, so that the first straight segment 4121 can pass through the clearance groove 301. This allows the first liquid inlet branch 411, the first straight segment 4121, and the liquid outlet branch 421 to be on the same plane, thereby reducing the space occupied by the second liquid inlet branch 412 and improving the integration of the heat exchange system.

[0052] like Figure 1 As shown, the piping assembly also includes an inlet pipe 510 and an outlet pipe 520. The inlet pipe 510 and the outlet pipe 520 are connected to the heat exchange medium circulation pipeline in the thermal management system to realize the circulation of heat exchange medium. The inlet pipe 510 is connected to the inlet main pipeline 410, and the outlet pipe 520 is connected to the outlet main pipeline 420 to transport and circulate the heat exchange medium. Both the inlet main pipeline 410 and the outlet main pipeline 420 extend along the second direction, so that the piping assembly can be distributed around the battery pack 100, improving the transport efficiency of the heat exchange medium and reducing the space occupied by the piping assembly.

[0053] Meanwhile, the bottom liquid inlet pipe connects the liquid inlet port 510 and the bottom heat exchange channel, and the bottom liquid outlet pipe connects the liquid outlet port 520 and the bottom heat exchange channel to realize the circulation of the heat exchange medium within the bottom heat exchange plate 200.

[0054] like Figure 1As shown, the liquid inlet 510 and the liquid inlet main pipeline 410, and the liquid outlet 520 and the liquid outlet main pipeline 420 are all connected by the first adapter block 610 to achieve uniform distribution of the heat exchange medium, reduce leakage of the heat exchange medium, and improve the reliability of the system.

[0055] like Figure 1 As shown, the main liquid inlet pipeline 410 and the liquid inlet branch are connected by a second adapter block 620, and the main liquid outlet pipeline 420 and the liquid outlet branch 421 are connected by a third adapter block 630, so as to achieve uniform distribution of heat exchange medium, reduce leakage of heat exchange medium, and improve the reliability of the system.

[0056] It should be noted that the adapter block is essentially a fluid distributor. The adapter block is a highly engineered integrated fluid distribution hub in the heat exchange system. Its core mission is to ensure the uniformity of coolant distribution, and on this basis, to achieve multiple goals such as simplifying the structure, reducing leakage, saving space, and improving the overall reliability and maintainability of the system. The adapter block is a commonly used fluid distribution device in this field, and its structure and function are common in this field, so they will not be described in detail here.

[0057] In this application, each side heat exchange plate 300 has a side heat exchange channel for the flow of heat exchange medium, and there is at least one side heat exchange channel, so that the heat exchange medium can flow through the side heat exchange channel to exchange heat and cool the battery pack 100 through the side heat exchange plate 300.

[0058] In some embodiments, the side heat exchange channels are connected in parallel; or, the side heat exchange channels are connected in series. The choice can be made according to actual needs, and this application embodiment does not limit this.

[0059] In this application, the two sides of the side heat exchange plate 300 can be bonded to the side of the battery pack 100 with thermally conductive adhesive, which improves the stability of the side heat exchange plate 300 during operation and improves the heat exchange efficiency with the battery pack 100.

[0060] In this application, each bottom heat exchange plate 200 has a bottom heat exchange channel for the flow of heat exchange medium, and there is at least one bottom heat exchange channel, so that the heat exchange medium can flow through the bottom heat exchange channel to exchange heat and cool the battery pack 100 through the bottom heat exchange plate 200.

[0061] In some embodiments, the bottom heat exchange channels are connected in parallel; or, the bottom heat exchange channels are connected in series. The choice can be made according to actual needs, and this application does not limit this.

[0062] In this application, the bottom heat exchange plate 200 can be bonded to the bottom surface of the battery pack 100 with thermally conductive adhesive, which improves the stability of the bottom heat exchange plate 200 during operation and improves the heat exchange efficiency with the battery pack 100.

[0063] In this application, the projected area of ​​the side heat exchange plate 300 covers the projected area of ​​the battery pack 100 in the first direction projection to ensure the heat exchange effect of the side heat exchange plate 300 on the battery pack 100, thereby improving the heat exchange effect of the heat exchange system.

[0064] In this application, on the third-party projection, the projection of the bottom heat exchange plate 200 covers the projection of all battery packs 100 to ensure the heat exchange effect of the bottom heat exchange plate 200 on the battery packs 100, thereby improving the heat exchange effect of the heat exchange system.

[0065] During the operation of the heat exchange system provided in this application embodiment, the heat exchange medium flows into the main inlet pipeline 410 through the inlet pipe 510, and is distributed to the parallel first inlet branch 411 and second inlet branch 412 through the main inlet pipeline 410, so that the side heat exchange plates 300 in the first side heat exchange group 310 and the side heat exchange plates 300 in the second side heat exchange group 320 are connected in parallel, so that the heat exchange medium can flow into each side heat exchange group synchronously, improving the uniformity of the heat exchange medium flow rate between the side heat exchange plates 300 and improving the cooling effect of the heat exchange system.

[0066] This application embodiment also provides a battery pack, which includes the heat exchange system described in the above embodiments. The battery pack also includes a housing, which has a space for accommodating the battery pack 100 and the heat exchange system. The heat exchange system includes a bottom heat exchange plate 200 and a side heat exchange plate 300, so as to achieve heat exchange of the battery pack 100 through the bottom heat exchange plate 200 and the side heat exchange plate 300.

[0067] Since the heat exchange system described above has the aforementioned technical effects, and the battery pack includes the aforementioned heat exchange system, the battery pack also has the corresponding technical effects, which will not be elaborated here.

[0068] It should be noted that the enclosure provides installation space for the battery pack 100, the battery management system (BMS), the heat exchange system, electrical connection components, etc., and through reasonable structural design, these components are fixed in the enclosure to ensure that they maintain a relatively stable position during the operation of the battery pack, and to avoid damage to components or loosening of connections due to vibration, impact or other factors.

[0069] It should be noted that the heat exchange plate is a component for regulating the temperature of the battery pack 100. The heat exchange plate has a heat exchange channel inside, which is used to circulate the heat exchange medium. The heat exchange medium can be a gas (air), a liquid (such as water, alcohol, refrigerant, oil, etc.), or a solid (such as thermally conductive adhesive, thermally conductive solder paste, etc.). The heat exchange channel has an inlet and an outlet for the heat exchange medium. The heat exchange medium can enter the heat exchange channel through the inlet, and after exchanging heat with the battery cells, it can be discharged through the outlet, thus realizing the heat exchange of the battery cells.

[0070] The above description of the embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A heat exchange system for exchanging heat in a battery pack, characterized in that, include: Bottom heat exchange plate, side heat exchange plate and piping assembly; The bottom heat exchange plate is attached to the bottom surface of the battery pack; The battery pack consists of several units, and the side heat exchange plates are several units located between adjacent battery packs, with both sides of the side heat exchange plates in contact with the sides of the battery packs. The piping assembly includes a main inlet pipeline, which connects to at least two inlet branches, and the at least two inlet branches are connected in parallel. The plurality of said side heat exchange plates are divided into at least two groups of side heat exchange groups, and each group of said side heat exchange groups is connected to one of said liquid inlet branches.

2. The heat exchange system according to claim 1, characterized in that, The piping assembly also includes a bottom liquid inlet pipe, which is connected to the bottom heat exchange plate; The flow rate of the liquid inlet pipe connected to the side heat exchange plate is A, and the flow rate of the bottom liquid inlet pipe of the bottom heat exchange plate is B, and A / B is 0.8-2.

3. The heat exchange system according to claim 1, characterized in that, The number of side heat exchange plates in each side heat exchange group is 2-6.

4. The heat exchange system according to claim 1, characterized in that, The number of side heat exchange plates included in the side heat exchange groups of different groups is the same.

5. The heat exchange system according to claim 1, characterized in that, The number of side heat exchange plates included in the side heat exchange groups of different groups is different, and the difference in the number of side heat exchange plates in the side heat exchange groups of different groups is 1-3. The number of side heat exchange plates in the side heat exchange group located away from the end of the main liquid inlet pipeline is even smaller.

6. The heat exchange system according to claim 1, characterized in that, Along the length of the side heat exchange plate, the distance between the liquid inlet branch and the side of the battery pack is 5mm-30mm.

7. The heat exchange system according to claim 1, characterized in that, In the vertical direction, the distance between the lower edge of the side heat exchange plate and the bottom heat exchange plate is 3mm-50mm.

8. The heat exchange system according to claim 1, characterized in that, The piping assembly also includes a main outlet pipeline, which connects to an outlet branch, and at least two sets of the side heat exchange groups connect to the outlet branch.

9. The heat exchange system according to claim 8, characterized in that, A plurality of the battery packs are distributed sequentially along a first direction, a plurality of the side heat exchange plates are distributed sequentially along the first direction, and the length direction of the side heat exchange plates extends along a second direction. At least two sets of the side heat exchange groups are distributed sequentially along the first direction; The first direction is perpendicular to the second direction.

10. The heat exchange system according to claim 9, characterized in that, The side heat exchange group includes a first side heat exchange group and a second side heat exchange group; The liquid inlet branch includes a first liquid inlet branch and a second liquid inlet branch. The first liquid inlet branch is connected to the first side heat exchange group, and the second liquid inlet branch is connected to the second side heat exchange group. Both the first liquid inlet branch and the second liquid inlet branch extend along the first direction.

11. The heat exchange system according to claim 10, characterized in that, The first liquid inlet branch is a straight line structure, and the liquid outlet branch is a straight line structure; The second inlet branch includes a first straight segment, a connecting segment, and a second straight segment connected in sequence; In the region of the first side heat exchange group, the first liquid inlet branch, the first straight segment, and the liquid outlet branch are distributed sequentially along the third direction. In the region of the second side heat exchange group, the second straight segment and the liquid outlet branch are distributed sequentially along the third direction; The first inlet branch is flush with the second straight segment; The first direction, the second direction, and the third direction are perpendicular to each other.

12. The heat exchange system according to claim 11, characterized in that, One end of each of the side heat exchange plates in the first side heat exchange group is provided with a clearance groove, which is used to make way for the first straight segment so that the first straight segment passes through the clearance groove.

13. The heat exchange system according to claim 11, characterized in that, The pipes connecting the first liquid inlet branch, the second straight section, and the liquid outlet branch between two adjacent side heat exchange plates are all telescopic pipes; The connecting section is a telescopic pipe.

14. The heat exchange system according to claim 8, characterized in that, Both the liquid inlet branch and the liquid outlet branch are located on one side of the side heat exchange plate.

15. The heat exchange system according to claim 8, characterized in that, The piping assembly also includes an inlet and an outlet; The inlet pipe is connected to the main inlet pipeline, and the outlet pipe is connected to the main outlet pipeline; Both the inlet main pipeline and the outlet main pipeline extend along the second direction.

16. The heat exchange system according to claim 1, characterized in that, The side heat exchange plate has a side heat exchange channel for the flow of heat exchange medium, and there is at least one side heat exchange channel.

17. The heat exchange system according to claim 1, characterized in that, The bottom heat exchange plate is connected to the bottom liquid inlet pipe and the bottom liquid outlet pipe; The bottom heat exchange plate has a bottom heat exchange channel for the flow of heat exchange medium, and there is at least one bottom heat exchange channel.

18. The heat exchange system according to claim 1, characterized in that, In the projection in the first direction, the projection of the side heat exchange plate overlaps the projection of the battery pack.

19. The heat exchange system according to claim 1, characterized in that, On a third-party projection, the projection of the bottom heat exchange plate covers the projection of all the battery packs.

20. A battery pack, characterized in that, Includes the heat exchange system as described in any one of claims 1-19.

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