Heat exchange plate and battery pack

Abstract

The present invention relates to the field of battery technology, and in particular to a heat exchange plate and a battery pack, wherein the heat exchange plate comprises a plate body, a medium inlet and a medium outlet, wherein the plate body has a heat exchange channel inside, wherein the heat exchange channel comprises a first channel and a second channel, wherein the first channel is connected to the medium inlet and serves as an inflow channel for the heat exchange medium, and the second channel is connected to the medium outlet and serves as an outflow channel for the heat exchange medium, wherein at least a portion of the first channel and at least a portion of the second channel extend along the same extension path and share a channel wall, wherein the channel wall separates the first channel from the second channel, and the flow direction of the heat exchange medium in the first channel is opposite to the flow direction in the second channel. Through the above-mentioned design, the present invention adopts the first channel and the second channel to share a channel wall, which can facilitate the alternation of hot and cold of the heat exchange medium flowing in the first channel and the second channel, thereby improving the heat exchange efficiency of the heat exchange plate, and facilitating the heat dissipation effect of the battery pack using the heat exchange plate.

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] In the existing battery pack design, the battery pack is provided with a heat exchange plate, and the heat exchange plate is used to dissipate heat from the battery. However, the heat exchange efficiency of the heat exchange plate of the existing battery pack is low, which affects the heat dissipation effect of the battery pack. Summary of the invention

[0003] A main purpose of the present invention is to overcome at least one defect of the above-mentioned prior art and provide a heat exchange plate with higher heat exchange efficiency.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] According to one aspect of the present invention, a heat exchange plate is provided, which includes a plate body, a medium inlet and a medium outlet. The plate body has a heat exchange flow channel inside, and the heat exchange flow channel includes a first flow channel and a second flow channel. The first flow channel is connected to the medium inlet and serves as an inlet flow channel for the heat exchange medium. The second flow channel is connected to the medium outlet and serves as an outflow flow channel for the heat exchange medium. At least a portion of the first flow channel and at least a portion of the second flow channel extend along the same extension path and share a flow channel wall. The flow channel wall separates the first flow channel from the second flow channel. The flow direction of the heat exchange medium in the first flow channel is opposite to that in the second flow channel.

[0006] It can be seen from the above technical solution that the advantages and positive effects of the heat exchange plate proposed in the present invention are:

[0007] The heat exchange plate proposed in the present invention includes a plate body, a medium inlet and a medium outlet. The plate body has a heat exchange channel inside. The heat exchange channel includes a first channel and a second channel. The first channel and the second channel serve as an inlet channel and an outlet channel of the heat exchange medium, respectively. At least a portion of the first channel and at least a portion of the second channel extend along the same extension path and share a channel wall. The channel wall separates the first channel from the second channel. The flow direction of the heat exchange medium in the first channel is opposite to that in the second channel. Through the above design, the present invention adopts the first channel and the second channel to share a channel wall, which can facilitate the alternation of hot and cold of the heat exchange medium flowing in the first channel and the second channel. The heat exchange efficiency of the heat exchange plate can be improved, which is beneficial to improving the heat dissipation effect of the battery pack using the heat exchange plate.

[0008] Another main purpose of the present invention is to overcome at least one defect of the above-mentioned prior art and provide a battery pack with better heat exchange effect.

[0009] To achieve the above object, the present invention adopts the following technical solutions:

[0010] According to another aspect of the present invention, a battery pack is provided, wherein the battery pack includes a battery and the heat exchange plate proposed in the present invention.

[0011] It can be seen from the above technical solutions that the advantages and positive effects of the battery pack proposed by the present invention are:

[0012] The battery pack proposed in the present invention can have a better heat dissipation effect by adopting the heat exchange plate proposed in the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Various objects, features and advantages of the present invention will become more apparent by considering the following detailed description of preferred embodiments of the present invention in conjunction with the accompanying drawings. The accompanying drawings are merely exemplary illustrations of the present invention and are not necessarily drawn to scale. In the accompanying drawings, the same reference numerals always refer to the same or similar parts. Among them:

[0014] Figure 1 is a schematic diagram of a three-dimensional structure of a heat exchange plate according to an exemplary embodiment;

[0015] Figure 2 yes Figure 1 A three-dimensional exploded schematic diagram of a heat exchange plate is shown;

[0016] Figure 3 yes Figure 1 A schematic plan view of a heat exchange plate is shown;

[0017] Figures 4 to 6 They are Figure 3 Partial cross-sectional views of several different positions of the heat exchange plate are shown;

[0018] Figure 7 yes Figure 1 A three-dimensional exploded schematic diagram of a partial structure of a heat exchange plate is shown;

[0019] Figure 8 yes Figure 7 A schematic diagram of the three-dimensional structure of the partition plate shown;

[0020] Fig. 9 yes Figure 7 A partial cross-sectional schematic diagram of the partition plate shown;

[0021] Fig.10 is a partial cross-sectional view of a heat exchange plate according to another exemplary embodiment;

[0022] Fig.11 and Fig.12 Schematic plan views of heat exchange plates according to two other exemplary embodiments are shown respectively.

[0023] The following are the descriptions of the reference numerals:

[0024] 110. First board;

[0025] 120. Second board;

[0026] 121. Groove;

[0027] 122. Positioning protrusion;

[0028] 130. Divider;

[0029] 131. The first separating rib;

[0030] 132. Reflux port;

[0031] 133. Positioning depression;

[0032] 201. First flow channel;

[0033] 202. Second flow channel;

[0034] 301. Medium inlet;

[0035] 302. Medium outlet;

[0036] 310. First wall;

[0037] 320. Second wall;

[0038] P1. Part I;

[0039] P2. Part II;

[0040] X. Extension direction;

[0041] Y. Width direction. DETAILED DESCRIPTION

[0042] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and drawings therein are essentially for illustrative purposes rather than for limiting the present invention.

[0043] In the following description of different exemplary embodiments of the present invention, reference is made to the accompanying drawings, which form a part of the present invention and in which different exemplary structures, systems and steps that can implement multiple aspects of the present invention are shown by way of example. It should be understood that other specific schemes of components, structures, exemplary devices, systems and steps can be used, and structural and functional modifications can be made without departing from the scope of the present invention. Moreover, although the terms "above", "between", "within", etc. may be used in this specification to describe different exemplary features and elements of the present invention, these terms are used herein only for convenience, such as according to the direction of the examples described in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of the structure to fall within the scope of the present invention.

[0044] See also Figure 1 , which is a representative schematic diagram of the three-dimensional structure of the heat exchange plate proposed in the present invention. In this exemplary embodiment, the heat exchange plate proposed in the present invention is described by taking the application of the heat exchange plate to a vehicle battery as an example. It is easy for those skilled in the art to understand that in order to apply the relevant design of the present invention to other types of battery devices or other processes, various modifications, additions, substitutions, deletions or other changes are made to the specific embodiments described below, and these changes are still within the scope of the principle of the heat exchange plate proposed in the present invention.

[0045] like Figure 1 As shown, in one embodiment of the present invention, the present invention includes a plate body, a medium inlet 301 and a medium outlet 302. The plate body has a heat exchange flow channel inside, and the heat exchange flow channel is used for the heat exchange medium to flow, thereby realizing heat exchange between the heat exchange plate and the battery. Figures 2 to 9 , Figure 2 A three-dimensional exploded schematic diagram of a heat exchange plate is representatively shown in FIG. Figure 3 201 and 202 are representatively shown in the plan view of the heat exchange plate, in which the heat exchange channel and the flow direction of the heat exchange medium therein are specifically shown. Since the flow directions of the heat exchange medium in the first channel 201 and the second channel 202 are different, Figure 3 In the figure, a solid arrow indicates the flow direction of the heat exchange medium in the first flow channel 201, i.e., the "heat exchange medium inflow" direction, and a dotted arrow indicates the flow direction of the heat exchange medium in the second flow channel 202, i.e., the "heat exchange medium outflow" direction; Figures 4 to 6 The partial cross-sectional views of several different positions of the heat exchange plate are representatively shown in FIG. Figure 4 Specifically shows the cross-sectional structure at the medium inlet 301, Figure 5 The cross-sectional structure at the reflux port 132 is specifically shown. Figure 6 The cross-sectional structures at other positions are specifically shown; Figure 7 A three-dimensional exploded schematic diagram of a partial structure of a heat exchange plate is representatively shown in FIG. Figure 8 A three-dimensional structural schematic diagram of the partition plate 130 is representatively shown in FIG. Fig. 9 A partial cross-sectional schematic diagram of the partition plate 130 is representatively shown in FIG. The structure, connection mode and functional relationship of each main component of the heat exchange plate proposed in the present invention will be described in detail below in conjunction with the above drawings.

[0046] like Figures 1 to 6 As shown, in one embodiment of the present invention, the heat exchange channel of the heat exchange plate may include a first channel 201 and a second channel 202, wherein the first channel 201 is connected to the medium inlet 301 and serves as an inflow channel for the heat exchange medium, and the second channel 202 is connected to the medium outlet 302 and serves as an outflow channel for the heat exchange medium. The first channel 201 and the second channel 202 share a channel wall, and the extension paths of the first channel 201 and the second channel 202 match, that is, at least part of the first channel 201 and at least part of the second channel 202 extend along the same extension path, and the flow direction of the heat exchange medium in the first channel 201 is opposite to the flow direction in the second channel 202. For example, the medium inlet 301 is connected to the head end of the first flow channel 201, and the medium outlet 302 is connected to the tail end of the second flow channel 202. The tail end of the first flow channel 201 is connected to the head end of the second flow channel 202. In other words, after the heat exchange medium enters the heat exchange flow channel through the medium inlet 301, it first enters the first flow channel 201, and the heat exchange medium flows along the extension path of the first flow channel 201 from the head end to the tail end of the first flow channel 201, and then enters the second flow channel 202. The extension path flows from the head end of the second flow channel 202 to the tail end, and then flows out through the medium outlet 302. In the above process, since the extension paths of the first flow channel 201 and the second flow channel 202 match, the paths through which the heat exchange medium flows in the first flow channel 201 and the second flow channel 202 are actually the same path, that is, the first flow channel 201 and the second flow channel 202 are separated by the flow channel wall in the same path, and the heat exchange medium can be regarded as circulated in a return path of this special structure. Through the above design, the present invention adopts the first flow channel 201 and the second flow channel 202 to share a flow channel wall, which can facilitate the alternation of hot and cold of the heat exchange medium flowing in the first flow channel 201 and the second flow channel 202, thereby improving the heat exchange efficiency of the heat exchange plate, which is beneficial to improving the heat dissipation effect of the battery pack using the heat exchange plate.

[0047] In one embodiment of the present invention, the thermal conductivity of the flow channel wall may be greater than or equal to 80W / (m·k), such as 80W / (m·k), 90W / (m·k), 120W / (m·k), 200W / (m·k), etc. Wherein, the thermal conductivity of the above-mentioned flow channel wall is measured when the flow rate of the heat exchange medium in the heat exchange flow channel is less than or equal to 0.6m / s. Through the above-mentioned design, the present invention can further ensure the heat conduction effect of the flow channel wall, and further facilitate the alternation of hot and cold of the heat exchange medium flowing in the first flow channel 201 and the second flow channel 202. In some embodiments, the thermal conductivity of the flow channel wall may also be less than 80W / (m·k), such as 79.9W / (m·k), etc., which is not limited to this embodiment.

[0048] like Figure 2 , Figure 7 and Figure 8 As shown, in one embodiment of the present invention, the plate body may include a first plate 110 and a second plate 120, and one of the first plate 110 and the second plate is used for heat exchange with the battery. The second plate 120 has a groove 121 recessed away from the first plate 110, and the groove 121 and the first plate 110 together form a flow channel cavity, and the flow channel cavity is formed with the above-mentioned heat exchange flow channel, that is, the flow channel cavity is formed with the above-mentioned first flow channel 201 and the second flow channel 202. It should be noted that when the first plate 110 is used for heat exchange with the battery, the plate body of the heat exchange plate is a planar structure (that is, the side surface of the first plate 110 facing away from the second plate 120) facing the battery and exchanging heat. Furthermore, when the second plate 120 is used for heat exchange with the battery, the plate body of the heat exchange plate is a concave-convex structure (that is, the groove 121) facing the battery and exchanging heat.

[0049] like Figure 2 , Figure 7 and Figure 8 As shown, in one embodiment of the present invention, a partition plate 130 is provided in the flow channel cavity, and the partition plate 130 separates the flow channel cavity into a first flow channel 201 and a second flow channel 202, and the partition plate 130 is the above-mentioned flow channel wall. Through the above-mentioned design, the present invention can use the partition plate 130 provided in the groove 121 of the second plate 120 to separate the first flow channel 201 and the second flow channel 202, and use the partition plate 130 as a flow channel wall shared by the first flow channel 201 and the second flow channel 202 for heat exchange.

[0050] like Figure 4 and Figure 5As shown, in one embodiment of the present invention, the second flow channel 202 has two sides facing and facing away from the first plate 110 and two sides along the width direction Y, and the width direction Y is perpendicular to the extension direction X of the first flow channel 201 and the second flow channel 202 and parallel to the surface of the first plate 110 facing the second plate 120. On this basis, at least two of the above four sides of the second flow channel 202 can be provided with the first flow channel 201. In other words, the first flow channel 201 can surround at least part of the periphery of the second flow channel 202.

[0051] like Figure 2 and Fig. 9 As shown, based on the design that the plate body includes the first plate 110, the second plate 120 and the partition plate 130, in one embodiment of the present invention, the partition plate 130 can be arranged at the bottom of the groove 121 of the second plate 120, and the partition plate 130 can be a channel structure with the groove opening facing away from the first plate 110. Accordingly, the partition plate 130 and the second plate 120 together form the second flow channel 202, and the partition plate 130, the first plate 110 and the second plate 120 together form the first flow channel 201.

[0052] like Figure 6 As shown, in one embodiment of the present invention, the partition plate 130 and the first plate 110 can be arranged at intervals, and the partition plate 130 is provided with a first partition rib 131 on the side facing the first plate 110, and the first partition rib 131 is connected to the first plate 110 (for example but not limited to welding), and the first partition rib 131 can separate the space of the flow channel cavity except the second flow channel 202 into at least two first flow channels 201. On this basis, the first flow channel 201 can be at least located on the side of the second flow channel 202 facing the first plate 110. It should be noted that in the embodiment shown in the drawings, a part of the first flow channel 201 is located on the side of the second flow channel 202 facing the first plate 110, and in some embodiments, the entire first flow channel 201 can be located on the side of the second flow channel 202 facing the first plate 110, that is, at this time, the size of the partition plate 130 and the groove 121 along the width direction Y is substantially the same. Through the above design, the present invention can ensure that at least a portion of the first flow channel 201 is closer to the battery than the second flow channel 202. Since the heat exchange medium is now connected in the first flow channel 201 after entering the heat exchange flow channel, and the temperature of the heat exchange medium is relatively low at this time, the above design can ensure that the heat exchange medium with a relatively low temperature is closer to the battery, that is, further improving the heat exchange effect and heat exchange efficiency of the heat exchange plate.

[0053] like Figure 6As shown, in one embodiment of the present invention, a width direction Y is defined, which is perpendicular to the extension direction X of the first flow channel 201 and the second flow channel 202 and parallel to the surface of the first plate 110 facing the second plate 120. Along the width direction Y, the two side edges of the partition plate 130 can be arranged with spacing from the two side walls of the groove 121, that is, the width of the partition plate 130 is smaller than the width of the groove 121, and part of the bottom of the groove 121 is exposed to participate in the formation of the first flow channel 201. On this basis, the first flow channel 201 can also be located on the side of the second flow channel 202 along the width direction Y. Through the above design, the present invention can further optimize the wrapping of the first flow channel 201 on the periphery of the second flow channel 202. For example, from a cross-sectional observation, a part of the first flow channel 201 is located between the second flow channel 202 and the first plate 110, and the other part is located on the side of the second flow channel 202 along the width direction Y, thereby making the alternation of hot and cold of the two more sufficient.

[0054] See also Fig.10 , Fig.10 2 is a partial cross-sectional view representatively showing a heat exchange plate in another exemplary embodiment that can embody the principles of the present invention.

[0055] like Fig.10 As shown, along the width direction Y, the two side edges of the partition plate 130 are spaced from the two side walls of the groove 121. On this basis, the side surface of the partition plate 130 facing the first plate 110 is connected to the first plate 110, that is, the side of the partition plate 130 facing the first plate 110 is in contact with the first plate 110 without any gap. On this basis, the first flow channel 201 is only located on the side of the second flow channel 202 along the width direction Y.

[0056] Based on the design that the plate body includes the first plate 110, the second plate 120 and the partition plate 130, in one embodiment of the present invention, the partition plate 130 may be provided with a second partition rib on the side facing away from the first plate 110, and the second partition rib is connected to the bottom of the groove 121, so that the second partition rib can separate the space of the flow channel cavity except the first flow channel 201 into two second flow channels 202. On this basis, taking the design that the above-mentioned heat exchange flow channel includes two first flow channels 201 arranged along the width direction Y as an example, the tail end of one first flow channel 201 is connected to the head end of one second flow channel 202, and the tail end of another first flow channel 201 is connected to the head end of another second flow channel 202. Accordingly, for the above-mentioned two groups of connected first flow channels 201 and second flow channels 202, the two groups can be connected through independent return ports 132 respectively, or through a return port 132 that connects all four at the same time.

[0057] like Figure 3 , Figure 5 , Figure 7 and Figure 8As shown, in one embodiment of the present invention, the partition plate 130 may be provided with a reflux port 132, that is, the reflux port 132 connects the two chambers of the flow channel cavity separated by the partition plate 130, that is, the first flow channel 201 is connected with the second flow channel 202, specifically, the tail end of the first flow channel 201 is connected with the head end of the second flow channel 202 via the reflux port 132. Through the above design, since the partition plate 130 separates the flow channel cavity into the first flow channel 201 and the second flow channel 202, the present invention opens the reflux port 132 on the partition plate 130, that is, the flow channel wall shared by the first flow channel 201 and the second flow channel 202, so as to realize the connection between the first flow channel 201 and the second flow channel 202, with a simple structure, convenient and flexible layout, and no additional components are required.

[0058] Based on the design that the flow channel cavity has two first flow channels 201 and second flow channels 202 arranged along the width direction Y, in one embodiment of the present invention, the partition plate 130 may only have one reflux port 132 (for example Fig.12 As shown in the figure, the tail ends of the two first flow channels 201 are connected, and the tail ends of the two first flow channels 201 are connected to the head end of the second flow channel 202 via the return port 132. Through the above design, the present invention can use one return port 132 to achieve the connection between the two first flow channels 201 and one second flow channel 202, further simplifying the complexity of the structure. In some embodiments, the partition plate 130 can also be provided with two return ports 132, according to which the tail ends of the two first flow channels 201 can be connected to the head end of the second flow channel 202 via the two return ports 132. Furthermore, when the flow channel cavity is formed with three or more first flow channels 201 arranged along the width direction Y, these first flow channels 201 may also be connected to the second flow channel 202 via one return port 132, or these first flow channels 201 may also be connected to the second flow channel 202 via at least three return ports 132, that is, at least two first flow channels 201 may be connected to the second flow channel 202 via the same return port 132, or may be connected to the second flow channel 202 via at least two return ports 132. This embodiment is not limited thereto.

[0059] It should be noted that the so-called partial areas of the two first flow channels 201 are connected, which can be understood as the first dividing rib 131 of the dividing plate 130 is disconnected in the partial area. In other words, when the first dividing rib 131 is continuous at all positions of the dividing plate 130 along the extension direction X of the first flow channel 201 and the second flow channel 202, the two first flow channels 201 separated by the first dividing rib 131 are not connected at any position.

[0060] In some embodiments of the present invention, when the flow channel cavity is formed with two first flow channels 201 arranged along the width direction Y and two second flow channels 202 arranged along the width direction Y, for example, the above-mentioned first dividing rib 131 and the second dividing rib exist at the same time, accordingly, the dividing plate 130 can be provided with two return ports 132, and the tail ends of the two first flow channels 201 are respectively connected to the head ends of the two second flow channels 202 via the two return ports 132.

[0061] like Figure 4 As shown, based on the design that the plate body includes a first plate 110, a second plate 120 and a partition plate 130, in one embodiment of the present invention, the heat exchange plate includes a medium inlet and outlet joint, and the medium inlet and outlet joint includes a first channel and a second channel. The first channel is sleeved on the outer periphery of the second channel, and the first channel and the second channel share a channel wall. One of the first channel and the second channel is connected to the first flow channel 201 and serves as the above-mentioned medium inlet 301, and the other one is connected to the second flow channel 202 and serves as the above-mentioned medium outlet 302.

[0062] like Figure 4 As shown, in one embodiment of the present invention, the medium inlet and outlet joint includes a first wall 310 and a second wall 320, and the first wall 310 is arranged around the outer periphery of the second wall 320 at intervals. Accordingly, the first channel is formed between the first wall 310 and the second wall 320, and the second channel is formed inside the second wall 320, wherein the second wall is the common channel wall.

[0063] like Figure 4 As shown, in one embodiment of the present invention, taking the design that the plate body includes the first plate 110, the second plate 120 and the partition plate 130 as an example, the first wall 310 is connected to the first plate 110, and one end of the second wall 320 extends into the flow channel cavity and is connected to the partition plate 130. On this basis, the space between the first wall 310 and the second wall 320 forms a medium inlet 301 connected to the first flow channel 201, and the second wall 320 forms a medium outlet 302 connected to the second flow channel 202. Through the above design, the present invention can avoid the heat exchange medium that has passed the heat exchange cycle from affecting the temperature of the heat exchange medium that has just entered. Furthermore, for the direct cooling heat exchange plate, the heat exchange medium is generally easy to gasify after being heated. Therefore, the present invention adopts the heat exchange medium to enter from the first channel of the outer ring and exit from the second channel of the inner ring, which can avoid causing the air pressure to swell the heat exchange plate and cause deformation.

[0064] like Figure 4As shown, based on the design that the heat exchange plate includes a medium inlet and outlet joint and the medium inlet and outlet joint includes a first wall 310 and a second wall 320, in one embodiment of the present invention, the design that the flow channel cavity is formed with two first flow channels 201 arranged along the width direction Y is taken as an example, and the two first flow channels 201 can be connected to the first wall 310 respectively.

[0065] like Figure 7 As shown, based on the design that the plate body includes the first plate 110, the second plate 120 and the partition plate 130, in one embodiment of the present invention, the bottom of the groove 121 of the second plate 120 may be provided with a positioning protrusion 122, and the edge of the partition plate 130 may be provided with a positioning recess 133, and the positioning protrusion 122 is positioned and matched with the positioning recess 133. Through the above design, the present invention can improve the assembly accuracy and stability of the partition plate 130 in the groove 121 of the second plate 120.

[0066] It should be noted that the above descriptions of the flow channel cavity, the first flow channel 201, the second flow channel 202, the channel, and the partition plate 130 do not specifically involve the overall layout of the heat exchange flow channel, that is, the above descriptions of the implementation methods can be Figure 3 , Fig.11 or Fig.12 The overall layout of the heat exchange flow channels shown is understood separately and does not constitute a limitation.

[0067] See also Fig.11 , Fig.11 201 and 202 are representatively shown as a schematic plan view of another exemplary embodiment of a heat exchange plate that can embody the principles of the present invention. The heat exchange channel and the flow direction of the heat exchange medium therein are specifically shown. Since the flow directions of the heat exchange medium in the first channel 201 and the second channel 202 are different, Fig.11 In the figure, the flow direction of the heat exchange medium in the first flow channel 201 is indicated by a solid arrow, that is, the "liquid inlet" direction, and the flow direction of the heat exchange medium in the second flow channel 202 is indicated by a dotted arrow, that is, the "liquid outlet" direction.

[0068] like Fig.11As shown, in one embodiment of the present invention, the heat exchange channel of the heat exchange plate may include at least two parts, and each part may include two first channels 201 and at least one second channel 202 arranged along the width direction Y. On this basis, the at least two parts may include two first parts P1, the orthographic projection of the first part P1 on the surface of the first plate 110 is semi-circular, one end of the two first parts P1 is commonly connected to the medium inlet 301 and the medium outlet 302, and the first channel 201 and the second channel 202 at the other end of the two first parts P1 are interconnected, so that the orthographic projection of the heat exchange channel on the surface of the first plate 110 is annular. Through the above design, the present invention can make the area of ​​the arrangement area of ​​the heat exchange channel on the heat exchange plate larger, thereby ensuring the heat exchange efficiency and cooling effect.

[0069] like Figure 3 As shown, based on the design that the at least two parts of the heat exchange channel include two first parts P1, in one embodiment of the present invention, the at least two parts of the heat exchange channel may also include a second part P2, and the orthographic projection of the second part P2 on the surface of the first plate 110 may be located inside the above-mentioned ring, and one end of the second part P2 is connected to the connection between the two first parts P1, the second channel 202 of the second part P2 is respectively connected to the second channel 202 of the two first parts P1, and the two first channels 201 of the second part P2 are respectively connected to each first channel 201 of the two first parts P1 located in the inner circle of the ring.

[0070] See also Fig.12 , Fig.12 201 and 202 are representatively shown as a schematic plan view of another exemplary embodiment of a heat exchange plate that can embody the principles of the present invention. The heat exchange channel and the flow direction of the heat exchange medium therein are specifically shown. Since the flow directions of the heat exchange medium in the first channel 201 and the second channel 202 are different, Fig.12 In the figure, the flow direction of the heat exchange medium in the first flow channel 201 is indicated by a solid arrow, that is, the "heat exchange medium inflow" direction, and the flow direction of the heat exchange medium in the second flow channel 202 is indicated by a dotted arrow, that is, the "heat exchange medium outflow" direction.

[0071] Different from Figure 3 or Fig.11 In the embodiment shown, the heat exchange channel is designed to include at least two parts, such as Fig.12 As shown, in one embodiment of the present invention, the heat exchange channel may also include only one portion, and the orthographic projection of the one portion on the surface of the first plate 110 may be in a straight line shape. Of course, in some embodiments, when the heat exchange channel includes only one portion, the orthographic projection of the one portion on the surface of the first plate 110 may also be in other shapes, such as a semi-arc shape, a wave shape, etc., and is not limited to this embodiment.

[0072] It should be noted that the heat exchange plates shown in the drawings and described in this specification are only a few examples of the many types of heat exchange plates that can employ the principles of the present invention. It should be clearly understood that the principles of the present invention are by no means limited to any details or any components of the heat exchange plates shown in the drawings or described in this specification.

[0073] In summary, the heat exchange plate proposed in the present invention includes a plate body, a medium inlet 301 and a medium outlet 302. The plate body has a heat exchange channel inside. The heat exchange channel includes a first channel 201 and a second channel 202. The first channel 201 and the second channel 202 serve as the inlet channel and the outlet channel of the heat exchange medium, respectively. At least part of the first channel 201 and at least part of the second channel 202 extend along the same extension path and share a channel wall. The channel wall separates the first channel 201 and the second channel 202. The flow direction of the heat exchange medium in the first channel 201 is opposite to that in the second channel 202. Through the above design, the present invention adopts the first channel 201 and the second channel 202 to share a channel wall, which can facilitate the alternation of hot and cold of the heat exchange medium flowing in the first channel 201 and the second channel 202. The heat exchange efficiency of the heat exchange plate can be improved, which is beneficial to improve the heat dissipation effect of the battery pack using the heat exchange plate.

[0074] Based on the above detailed description of several exemplary embodiments of the heat exchange plate proposed in the present invention, several exemplary embodiments of the battery pack proposed in the present invention will be described below.

[0075] In one embodiment of the present invention, the battery pack provided by the present invention includes a battery and a heat exchange plate provided by the present invention and described in detail in the above embodiment.

[0076] In one embodiment of the present invention, the cross-sectional area of ​​the first flow channel 201 may be greater than the cross-sectional area of ​​the second flow channel 202, and at least a portion of the first flow channel 201 is closer to the battery than the second flow channel 202. Figure 6 It can be observed that the cross-sectional area of ​​each first flow channel 201 is greater than the cross-sectional area of ​​the second flow channel 202. In some embodiments, when the number of the first flow channels 201 and the second flow channels 202 is not limited, the sum of the cross-sectional areas of the first flow channels 201 can be greater than the sum of the cross-sectional areas of the second flow channels 202. Through the above design, the present invention can further improve the heat exchange efficiency and heat exchange effect of the heat exchange plate.

[0077] It should be noted that the battery packs shown in the drawings and described in this specification are only a few examples of many types of battery packs that can adopt the principles of the present invention. It should be clearly understood that the principles of the present invention are by no means limited to any details or any components of the battery packs shown in the drawings or described in this specification.

[0078] In summary, the battery pack proposed in the present invention can have a better heat dissipation effect by adopting the heat exchange plate proposed in the present invention.

[0079] The exemplary embodiments of the heat exchange plate and battery pack proposed by the present invention are described and / or illustrated in detail above. However, the embodiments of the present invention are not limited to the specific embodiments described herein. On the contrary, the components and / or steps of each embodiment can be used independently and separately from other components and / or steps described herein. Each component and / or each step of an embodiment can also be used in combination with other components and / or steps of other embodiments. When introducing the elements / components / etc. described and / or illustrated herein, the terms "one", "one" and "above" are used to indicate the presence of one or more elements / components / etc. The terms "comprising", "including" and "having" are used to indicate an open-ended inclusion and mean that in addition to the listed elements / components / etc., there may be additional elements / components / etc. In addition, the terms "first" and "second" in the claims and the specification are used only as markers and are not numerical restrictions on their objects.

[0080] Although the heat exchange plate and battery pack proposed in the present invention have been described according to different specific embodiments, those skilled in the art will recognize that the implementation of the present invention can be modified within the spirit and scope of the claims.

Claims

1. A heat exchange plate, characterized in that: The heat exchanger comprises a plate body, a medium inlet and a medium outlet, wherein the plate body has a heat exchange channel inside, wherein the heat exchange channel comprises a first channel and a second channel, wherein the first channel is connected to the medium inlet and serves as an inflow channel for the heat exchange medium, and the second channel is connected to the medium outlet and serves as an outflow channel for the heat exchange medium, wherein at least a portion of the first channel and at least a portion of the second channel extend along the same extension path and share a channel wall, wherein the channel wall separates the first channel and the second channel, and the flow direction of the heat exchange medium in the first channel is opposite to the flow direction in the second channel; wherein the plate body comprises a first plate and a second plate , one of the first plate and the second plate is used for heat exchange with the battery, the second plate has a groove recessed away from the first plate, the groove and the first plate together form a flow channel cavity, the flow channel cavity forms the heat exchange flow channel; wherein the heat exchange plate includes a medium inlet and outlet joint, the medium inlet and outlet joint includes a first channel and a second channel, the first channel is sleeved on the outer periphery of the second channel, the first channel and the second channel share a channel wall, one of the first channel and the second channel is connected to the first flow channel and serves as the medium inlet, and the other of the first channel and the second channel is connected to the second flow channel and serves as the medium outlet.

2. The heat exchange plate according to claim 1, characterized in that: The thermal conductivity of the flow channel wall is greater than or equal to 80 W / (m·k).

3. The heat exchange plate according to claim 1, characterized in that: The second flow channel has two sides facing and facing away from the first plate and two sides along the width direction, and the width direction is perpendicular to the extension direction of the first flow channel and the second flow channel and parallel to the surface of the first plate facing the second plate; wherein the first flow channel is provided on at least two of the four sides of the second flow channel.

4. The heat exchange plate according to claim 1, characterized in that: A partition plate is provided in the flow channel cavity, and the partition plate separates the flow channel cavity into the first flow channel and the second flow channel. The partition plate is the flow channel wall.

5. The heat exchange plate according to claim 4, characterized in that: The partition plate is arranged at the bottom of the groove, and the partition plate is a channel structure with a notch open to the first plate. The partition plate and the second plate together form the second flow channel, and the partition plate, the first plate and the second plate together form the first flow channel.

6. The heat exchange plate according to claim 5, characterized in that: The partition plate is arranged at an interval with the first plate, and a first partition rib is protrudingly provided on the side of the partition plate facing the first plate, the first partition rib is connected to the first plate, and the first partition rib divides the space of the flow channel cavity except the second flow channel into two first flow channels; wherein, the first flow channel is at least located on the side of the second flow channel facing the first plate.

7. The heat exchange plate according to claim 6, characterized in that: A width direction is defined, wherein the width direction is perpendicular to the extension direction of the first flow channel and the second flow channel and is parallel to the surface of the first plate facing the second plate, and along the width direction, the two side edges of the partition plate are respectively spaced apart from the two side groove walls of the groove; wherein the first flow channel is also located on the side of the second flow channel along the width direction.

8. The heat exchange plate according to claim 5, characterized in that: A width direction is defined, wherein the width direction is perpendicular to the extension direction of the first flow channel and the second flow channel and is parallel to the surface of the first plate facing the second plate, and along the width direction, the two side edges of the partition plate are spaced apart from the two side groove walls of the groove respectively; wherein a side surface of the partition plate facing the first plate is connected to the first plate; wherein the first flow channel is only located on the side of the second flow channel along the width direction.

9. The heat exchange plate according to claim 6 or 8, characterized in that: A second dividing rib is protrudingly provided on the side of the dividing plate facing away from the first plate, and the second dividing rib is connected to the bottom of the groove. The second dividing rib divides the space of the flow channel cavity except the first flow channel into two second flow channels; wherein the tail end of one first flow channel is connected to the head end of one second flow channel, and the tail end of another first flow channel is connected to the head end of another second flow channel.

10. The heat exchange plate according to claim 1, characterized in that: The partition plate is provided with a reflux port, and the tail end of the first flow channel is communicated with the head end of the second flow channel via the reflux port.

11. The heat exchange plate according to claim 10, characterized in that: The flow channel cavity is formed with at least two first flow channels and the second flow channels, and the at least two first flow channels are arranged along a width direction, and the width direction is perpendicular to the extension direction of the first flow channel and the second flow channel and parallel to the surface of the first plate facing the second plate; wherein: The partition plate is provided with a reflux port, and at least two of the first flow channels are connected to the second flow channel via the reflux port; or The partition plate is provided with at least two reflux ports, and at least two of the first flow channels are respectively connected to the second flow channel via the at least two reflux ports.

12. The heat exchange plate according to claim 11, characterized in that: The medium inlet and outlet joint includes a first wall and a second wall. The first wall is arranged around the outer circumference of the second wall at intervals. The first channel is formed between the first wall and the second wall. The second channel is formed inside the second wall. The second wall is the common channel wall.

13. The heat exchange plate according to claim 12, characterized in that: The plate body includes a first plate and a second plate, one of the first plate and the second plate is used for heat exchange with the battery, the second plate has a groove recessed away from the first plate, the groove and the first plate together form a flow channel cavity, the flow channel cavity forms the heat exchange flow channel, a partition plate is arranged in the flow channel cavity, the partition plate separates the flow channel cavity into the first flow channel and the second flow channel, the partition plate is the flow channel wall; wherein, the first wall is connected to the first plate, and the second wall is connected to the partition plate.

14. The heat exchange plate according to claim 12, characterized in that: The flow channel cavity is formed with at least two first flow channels, and at least two first flow channels are arranged along the width direction, and the width direction is perpendicular to the extension direction of the first flow channels and the second flow channels and parallel to the surface of the first plate facing the second plate; wherein at least two first flow channels are respectively connected to the first wall.

15. The heat exchange plate according to claim 1, characterized in that: A positioning protrusion is protruding from the bottom of the groove, and a positioning recess is formed at the edge of the partition plate. The positioning protrusion is positioned and matched with the positioning recess.

16. The heat exchange plate according to claim 1, characterized in that: The heat exchange channel includes at least two first parts, the orthographic projection of the first part on the surface of the first plate is semi-circular, one end of the two first parts is commonly connected to the medium inlet and the medium outlet, and the first channel and the second channel at the other ends of the two first parts are connected to each other, so that the orthographic projection of the heat exchange channel on the surface of the first plate is circular.

17. The heat exchange plate according to claim 16, characterized in that: The heat exchange flow channel also includes at least one second part, the orthographic projection of the second part on the surface of the first plate is located inside the ring, one end of the second part is connected to the connection between the two first parts, the second flow channel of the second part is respectively connected to the second flow channels of the two first parts, and the two first flow channels of the second part are respectively connected to one first flow channel of the two first parts located at the inner circle of the ring.

18. A battery pack, characterized in that: The invention comprises a battery and the heat exchange plate according to any one of claims 1 to 17.

19. The battery pack according to claim 18, characterized in that: A cross-sectional area of ​​the first flow channel is greater than a cross-sectional area of ​​the second flow channel.

20. The battery pack according to claim 18, characterized in that: At least a portion of the first flow channel is closer to the battery than the second flow channel.

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