Heat exchange plate and battery pack

Abstract

The present invention relates to the field of battery technology, and discloses a heat exchange plate and a battery pack. The heat exchange plate includes a heat exchange plate body, on which a plurality of heat exchange channels connected in parallel are provided. Each heat exchange channel is arranged to form a heat exchange partition, and the heat exchange partition can exchange heat with the battery module. The heat exchange plate body is also provided with a water inlet, a water outlet and a main channel. One end of the main channel is connected to the water inlet, and the other end is connected to a plurality of heat exchange channels. The ends of the heat exchange channels away from the main channel are connected to the water outlet, and the main channel is arranged between two adjacent heat exchange partitions. The present invention is used to perform heat exchange on the battery module in a regionalized and modular manner, so that the heat exchange on the battery module can be performed more specifically, with a better adjustment effect, which is conducive to ensuring the temperature difference of the entire battery pack. It is conducive to reducing the damage to the battery module close to the main channel caused by the excessive temperature difference between the heat exchange liquid in the main channel and the battery module, and is also conducive to improving the temperature balance of the entire battery pack.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a heat exchange plate and a battery pack. Background Art

[0002] Stamped liquid cooling plates have become the preferred liquid cooling method for electric vehicles due to their flexible flow channel design, good battery cell temperature control, fewer components in the battery pack, and low leakage risk.

[0003] In existing technology, large stamped liquid cold plates, due to their large size, have difficulty controlling temperature differences across the entire pack. During the design phase, flow distribution must be constantly adjusted to minimize temperature differences across the pack. Adjusting local flow channels affects flow distribution across a larger area, creating a high level of variation. Furthermore, significant differences in heat exchange performance between areas near and far from the water inlet lead to larger temperature differences across the pack.

[0004] Therefore, there is an urgent need for a heat exchange plate and a battery pack to solve the above problems. Summary of the Invention

[0005] Based on the above, the object of the present invention is to provide a heat exchange plate and a battery pack, which can provide more targeted cooling for the battery module and achieve a more balanced cooling effect.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] Heat exchange plate, including:

[0008] A heat exchange plate body, wherein the heat exchange plate body is provided with a plurality of heat exchange channels connected in parallel, each of the heat exchange channels being arranged to form a heat exchange partition, and the heat exchange partition can exchange heat with the battery module;

[0009] The heat exchange plate body is also provided with a water inlet, a water outlet and a main channel. One end of the main channel is connected to the water inlet, and the other end is connected to multiple heat exchange channels. The end of the heat exchange channel away from the main channel is connected to the water outlet. The main channel is arranged between two adjacent heat exchange partitions.

[0010] As a preferred solution of a heat exchange plate, the length of the heat exchange channel close to the water inlet is greater than the length of the heat exchange channel away from the water inlet.

[0011] As a preferred solution of a heat exchange plate, the width of the heat exchange channel away from the water inlet is greater than the width of the heat exchange channel close to the water inlet.

[0012] As a preferred solution of a heat exchange plate, the heat exchange partitions are arranged in one-to-one correspondence with the battery modules; or two or more heat exchange partitions correspond to one battery module; or two or more battery modules correspond to one heat exchange partition.

[0013] As a preferred solution of a heat exchange plate, the plurality of heat exchange channels and the main channels are symmetrically arranged on the heat exchange plate body.

[0014] As a preferred solution of the heat exchange plate, a mounting hole is provided on the heat exchange plate body, and the heat exchange channel is a preset distance away from the mounting hole.

[0015] As a preferred solution of a heat exchange plate, the heat exchange flow channel in the heat exchange partition is arranged in a U-shape or an S-shape.

[0016] As a preferred solution of a heat exchange plate, the water inlet, the water outlet and the battery module are arranged on one side of the heat exchange plate body, and the heat exchange channel is arranged on the other side of the heat exchange plate body.

[0017] As a preferred solution of a heat exchange plate, the heat exchange plate further includes a heat conductive adhesive, and the heat conductive adhesive is arranged between the heat exchange plate body and the battery module.

[0018] A battery pack includes multiple battery modules and a heat exchange plate as described in any of the above solutions.

[0019] The beneficial effects of the present invention are:

[0020] The present invention provides a plurality of heat exchange channels connected in parallel, and each heat exchange channel is arranged to form a heat exchange partition for regional and modular heat exchange of battery modules, so that the heat exchange of battery modules can be more targeted, the regulation effect is better, and it is beneficial to ensure the temperature difference of the entire battery pack. By setting the main channel connected to the water inlet between two adjacent heat exchange partitions, since the temperature difference between the heat exchange liquid just entering the main channel through the water inlet and the battery module is large, such a setting can help reduce the influence of the main channel on the heat exchange partition near the water inlet. On the one hand, it reduces the damage to the battery module near the main channel caused by excessive temperature difference, and on the other hand, it is beneficial to improve the temperature balance of the entire battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without any creative work.

[0022] Figure 1 is a bottom view of a heat exchange plate provided in a specific embodiment of the present invention;

[0023] Figure 2 Schematic diagram of a heat exchange plate and a battery module provided in a specific embodiment of the present invention.

[0024] In the picture:

[0025] 1. Heat exchange plate body; 11. Heat exchange flow channel; 12. Heat exchange partition; 13. Mounting hole;

[0026] 2. Water inlet; 3. Water outlet; 4. Main channel;

[0027] 100. Battery module. DETAILED DESCRIPTION

[0028] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, but are not to be construed as limiting the present invention.

[0029] In the description of the present invention, it should be noted that the terms "center," "up," "down," "left," "right," "vertical," "horizontal," "inside," and "outside" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0030] Unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed or removable connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0031] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0032] like Figure 1 and Figure 2As shown, this embodiment provides a heat exchange plate for a battery pack, which includes a heat exchange plate body 1. The heat exchange plate body 1 is provided with a plurality of heat exchange channels 11 connected in parallel. Each heat exchange channel 11 is arranged to form a heat exchange partition 12, and the heat exchange partition 12 can exchange heat with the battery module 100; the heat exchange plate body 1 is also provided with a water inlet 2, a water outlet 3 and a main channel 4. One end of the main channel 4 is connected to the water inlet 2, and the other end is connected to the plurality of heat exchange channels 11. The end of the heat exchange channel 11 away from the main channel 4 is connected to the water outlet 3, and the main channel 4 is arranged between two adjacent heat exchange partitions 12.

[0033] By setting up a plurality of heat exchange channels 11 connected in parallel, and each heat exchange channel 11 is arranged to form a heat exchange partition 12, it is used to regionalize and modularize the heat exchange of the battery module 100, so that the heat exchange of the battery module 100 can be more targeted, the adjustment effect is better, and it is beneficial to ensure the temperature difference of the entire battery pack. By setting the main channel 4 connected to the water inlet 2 between two adjacent heat exchange partitions 12, since the temperature difference between the heat exchange liquid just entering the main channel 4 through the water inlet 2 and the battery module 100 is relatively large, such a setting can help reduce the influence of the main channel 4 on the heat exchange partition 12 near the water inlet 2. On the one hand, it reduces the damage to the battery module 100 near the main channel 4 caused by excessive temperature difference, and on the other hand, it is beneficial to improve the temperature balance of the entire battery pack.

[0034] It is worth noting that the multiple parallel heat exchange channels 11 help reduce temperature differences between the heat exchange zones 12, improving battery pack temperature consistency while also effectively reducing flow resistance. For example, the heat exchange fluid within the heat exchange channels 11 can be liquid water. Specifically, the dimensions of the heat exchange plate body 1 can be 2052mm x 1332mm.

[0035] This embodiment further discloses a battery pack, comprising a plurality of battery modules 100 and a heat exchange plate as described in any of the above solutions. The battery pack using the heat exchange plate can achieve a more balanced heat exchange effect between the plurality of battery modules 100.

[0036] As an optional solution for the heat exchange plate, the heat exchange partition 12 near the water inlet 2 has a smaller flow resistance and a larger distribution of heat exchange fluid, which easily leads to the heat exchange efficiency of the heat exchange partition 12 near the water inlet 2 being greater than the heat exchange effect of the heat exchange partition 12 far from the water inlet 2. Therefore, the length of the heat exchange flow channel 11 near the water inlet 2 is greater than that of the heat exchange flow channel 11 far from the water inlet 2 to increase the flow resistance of the heat exchange partition 12, thereby effectively balancing the heat exchange effect between multiple heat exchange partitions 12.

[0037] Optionally, the form of the heat exchange channel 11 can be individually adjusted for each heat exchange zone 12, and the flow distribution of the heat exchange fluid within the heat exchange zone 12 can be adjusted by adjusting the complexity of the heat exchange channel 11. For example, the heat exchange channel 11 within the heat exchange zone 12 is arranged in a U-shaped or S-shaped pattern, and the length of the heat exchange channel 11 can be adjusted as needed.

[0038] Furthermore, the width of the heat exchange channel 11 away from the water inlet 2 is greater than the width of the heat exchange channel 11 near the water inlet 2. By controlling the width of the heat exchange channel 11, the flow distribution of each heat exchange zone 12 is adjusted, so that the width of the heat exchange channel 11 of the heat exchange zone 12 near the water inlet 2 is narrower, and the width of the heat exchange channel 11 of the heat exchange zone 12 away from the water inlet 2 is wider. Different widths of the heat exchange channel 11 are set according to the distance of the heat exchange fluid flow. The heat exchange channel 11 near the water inlet 2 is narrow, and the flow resistance in the heat exchange zone 12 is larger, which is conducive to reducing the flow rate of the heat exchange fluid; the heat exchange channel 11 of the heat exchange zone 12 away from the water inlet 2 is wider, and the flow resistance in the heat exchange zone 12 is smaller, which is conducive to increasing the flow rate of the heat exchange fluid; by increasing the width of the heat exchange channel 11 in a stepped manner, the heat exchange fluid flow rate relative to the water inlet 2 is gradually increased from near to far, so as to balance the heat exchange effects of different heat exchange zones 12.

[0039] It is worth noting that the heat exchange plate body 1 can be formed by stamping, so the feasibility of stamping manufacturing needs to be considered to avoid the heat exchange channel 11 being too narrow, resulting in insufficient stamping depth, and being too wide, resulting in bulging and deformation of the channel. Therefore, in this embodiment, the heat exchange channel 11 of the heat exchange partition 12 near the water inlet 2 is designed to have a width of approximately 15mm, which is a relatively narrow dimension in the stamping process; the heat exchange channel 11 of the heat exchange partition 12 away from the water inlet 2 is designed to have a width of approximately 20mm-22mm; and the heat exchange channel 11 of the heat exchange partition 12 further away from the water inlet 2 is designed to have a width of approximately 25mm, which is a relatively wide dimension in the stamping process.

[0040] For example, a heat exchange partition 12 is provided in a one-to-one correspondence with a battery module 100; or two or more heat exchange partitions 12 correspond to one battery module 100; or two or more battery modules 100 correspond to one heat exchange partition 12. Those skilled in the art can set the correspondence between the heat exchange partitions 12 and the battery modules 100 based on the size of the battery module 100 and the distance from the water inlet 2.

[0041] In this embodiment, the battery pack is provided with eight battery modules 100. Accordingly, twelve heat exchange zones 12 are provided on the heat exchange plate. The four heat exchange zones 12 near the water inlet 2 are respectively provided in a one-to-one correspondence with the four battery modules 100. The heat exchange channels 11 of these four heat exchange zones 12 are relatively long and relatively narrow, approximately 15 mm in width. The eight heat exchange zones 12 away from the water inlet 2 are respectively provided in a two-to-one correspondence with the other four battery modules 100. The heat exchange channels 11 of the four heat exchange zones 12 near the water inlet 2 are relatively short and relatively wide, approximately 20 mm to 22 mm in width. The heat exchange channels 11 of the other four heat exchange zones 12 are the shortest in length and the widest in width, approximately 25 mm.

[0042] Furthermore, the four heat exchange zones 12 near the water inlet 2 are spaced relatively wide apart, allowing the main channel 4 to avoid the four corresponding battery modules 100. This prevents the heat exchange fluid entering the heat exchange channel 11 through the water inlet 2 from excessively affecting the temperature of the end plates of the battery modules 100. For example, in heating conditions, this prevents overheated heat exchange fluid from heating the end plates of the battery modules 100, causing excessively high battery temperatures at the end plates; and in cooling conditions, this prevents low-temperature heat exchange fluid from excessively cooling the end plates of the battery modules 100, thereby reducing the impact of excessive heat exchange on the battery modules 100.

[0043] Correspondingly, the eight heat exchange zones 12 away from the water inlet 2 can be set to a smaller spacing. Since the temperature of the heat exchange liquid in the heat exchange channel 11 away from the water inlet 2 will not be too cold or overheated, heat exchange can be directly performed on the battery module 100, and at the same time, the problem of low heat exchange efficiency at the end away from the water inlet 2 can be solved.

[0044] As an optional solution for a heat exchange plate, multiple heat exchange channels 11 and main channels 4 are symmetrically arranged on the heat exchange plate body 1. By symmetrically arranging multiple heat exchange channels 11 and main channels 4, on the one hand, it is beneficial to reduce flow resistance, and on the other hand, during the heat exchange plate design stage, only half of the structure of the heat exchange plate needs to be designed, and the other half can be obtained through symmetry, which is beneficial to improving R&D and design efficiency.

[0045] In this embodiment, to achieve installation between the heat exchange plate and the battery module 100, a mounting hole 13 is provided on the heat exchange plate body 1. To reduce the impact of the mounting hole 13 on the heat exchange channel 11, the heat exchange channel 11 is away from the mounting hole 13 by a preset distance.

[0046] Furthermore, the water inlet 2, the water outlet 3 and the battery module 100 are arranged on one side of the heat exchange plate body 1, and the heat exchange channel 11 is arranged on the other side of the heat exchange plate body 1, which can not only ensure the heat exchange between the heat exchange channel 11 and the battery module 100, but also facilitate the installation of the battery module 100.

[0047] Preferably, in order to improve the heat exchange efficiency between the battery module 100 and the heat exchange plate, the heat exchange plate further includes a thermally conductive adhesive, which is disposed between the heat exchange plate body 1 and the battery module 100 .

[0048] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there may be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. Heat exchange plate, characterized in that, include: A heat exchange plate body (1), wherein a plurality of heat exchange channels (11) connected in parallel are provided on the heat exchange plate body (1), each heat exchange channel (11) is arranged to form a heat exchange partition (12), and the heat exchange partition (12) can exchange heat with the battery module (100); The heat exchange plate body (1) is further provided with a water inlet (2), a water outlet (3) and a main channel (4); one end of the main channel (4) is in communication with the water inlet (2), and the other end is in communication with a plurality of heat exchange channels (11); the ends of the heat exchange channels (11) away from the main channel (4) are in communication with the water outlet (3); and the main channel (4) is provided between two adjacent heat exchange partitions (12); The length of the heat exchange channel (11) close to the water inlet (2) is greater than the length of the heat exchange channel (11) away from the water inlet (2); The width of the heat exchange channel (11) away from the water inlet (2) is greater than the width of the heat exchange channel (11) close to the water inlet (2); The heat exchange partitions (12) are arranged in a one-to-one correspondence with the battery modules (100); or two or more heat exchange partitions (12) correspond to one battery module (100); or two or more battery modules (100) correspond to one heat exchange partition (12); The intervals between the heat exchange partitions (12) close to the water inlet (2) are greater than the intervals between the heat exchange partitions (12) far from the water inlet (2).

2. The heat exchange plate according to claim 1, characterized in that The plurality of heat exchange channels (11) and the main channel (4) are symmetrically arranged on the heat exchange plate body (1).

3. The heat exchange plate according to claim 1, characterized in that A mounting hole (13) is provided on the heat exchange plate body (1), and the heat exchange flow channel (11) is a preset distance away from the mounting hole (13).

4. The heat exchange plate according to claim 1, characterized in that The heat exchange flow channel (11) in the heat exchange partition (12) is arranged in a U-shaped or S-shaped manner.

5. The heat exchange plate according to any one of claims 1 to 4, characterized in that: The water inlet (2), the water outlet (3) and the battery module (100) are arranged on one side of the heat exchange plate body (1), and the heat exchange channel (11) is arranged on the other side of the heat exchange plate body (1).

6. The heat exchange plate according to claim 5, characterized in that: The heat exchange plate further comprises heat conductive adhesive, which is arranged between the heat exchange plate body (1) and the battery module (100).

7. A battery pack, characterized in that: The invention comprises a plurality of battery modules (100) and a heat exchange plate according to any one of claims 1 to 6.

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