Heat exchange device, battery pack and electric equipment

Abstract

The utility model relates to the technical field of battery assembling and manufacturing, in particular to a heat exchange device, a battery pack and electric equipment. The heat exchange device comprises a first heat exchange plate arranged on one side of a battery in the battery pack, and the first heat exchange plate is provided with a first heat exchange runner; the second heat exchange plate is arranged on the other side of the battery and is provided with a second heat exchange runner; and the first heat exchange flow channel and the second heat exchange flow channel are respectively opposite to different areas of the battery. According to the working condition requirements of direct cooling and direct heating and the heat production characteristic of the battery, a runner is designed to be divided into two independent circulations, the two independent circulations are arranged on two heat exchange plates respectively, and the two heat exchange plates are arranged on different sides of the battery. Therefore, under a certain working condition, the necessary area of the battery can be cooled only through one heat exchange plate, the influence between the heat exchange plates is reduced, and cooling and heat dissipation are performed on the heating condition of the battery in a targeted manner, so that the efficiency of a single cooler is improved, and the overall power of the heat exchange device is reduced.

Description

Technical Field

[0001] This application relates to the field of battery assembly and manufacturing technology, and in particular to a heat exchange device, a battery pack, and an electrical device. Background Technology

[0002] For battery packs, especially power battery packs, liquid cooling plates are typically installed for thermal management. Currently, to meet the high heat and stringent thermal management requirements of battery packs, the common approach is to install liquid cooling plates on both the top and bottom covers of the battery pack.

[0003] However, when used for thermal management of power batteries, it is easy to encounter the problem of high overall load on the heat exchange system and low efficiency of individual coolers, resulting in a reduction in the overall efficiency of the heat exchange system. Utility Model Content

[0004] Based on this, this application provides a heat exchange device, a battery pack, and electrical equipment to solve the problems of large overall load and low efficiency of individual coolers in heat exchange systems.

[0005] On one hand, this application provides a heat exchange device for use in a battery pack, the heat exchange device comprising:

[0006] The first heat exchange plate is located on one side of the battery in the battery pack, and the first heat exchange plate is provided with a first heat exchange flow channel.

[0007] The second heat exchange plate is located on the other side of the battery and has a second heat exchange flow channel.

[0008] The first heat exchange channel and the second heat exchange channel are respectively arranged opposite to different areas of the battery, and along the projection direction from the first heat exchange plate to the second heat exchange plate, the projection of the first heat exchange channel and the projection of the second heat exchange channel coincide or are misaligned.

[0009] In one possible implementation, the first heat exchange channel is positioned opposite to the central region of the battery, and the second heat exchange channel is positioned opposite to the outer peripheral region of the battery.

[0010] In one possible implementation, the first heat exchange channel is located below the battery, and the second heat exchange channel is located above the battery.

[0011] In one possible implementation, the distribution area of ​​the first heat exchange channel is greater than that of the second heat exchange channel.

[0012] In one possible implementation, the first heat exchange channel includes a plurality of spaced channels, and the second heat exchange channel includes a plurality of spaced channels.

[0013] In one possible implementation, the spacing between two adjacent channels in the first heat exchange channel is greater than the spacing between two adjacent channels in the second heat exchange channel.

[0014] In one possible implementation, the first heat exchange channel includes multiple first heat exchange main channels and a first connecting channel, with the multiple first heat exchange main channels arranged side by side;

[0015] Along the flow path direction, the first connecting flow channel connects two adjacent first heat exchange main flow channels.

[0016] In one possible implementation, the first heat exchange main channel includes multiple first heat exchange branch channels, and along the flow path direction, one end of the first connecting channel is connected to multiple first heat exchange branch channels of the same first heat exchange main channel.

[0017] In one possible implementation, the first heat exchange channel is an S-shaped rotary channel.

[0018] In one possible implementation, the first heat exchange channel further includes a first liquid inlet channel and a first liquid outlet channel;

[0019] Along the flow path, one end of the first liquid inlet channel is connected to the outermost first heat exchange main channel on one side of a plurality of first heat exchange main channels arranged side by side, and one end of the first liquid outlet channel is connected to the outermost first heat exchange main channel on the other side.

[0020] In one possible implementation, the second heat exchange channel includes multiple second heat exchange main channels and a second connecting channel, with the multiple second heat exchange main channels arranged side by side;

[0021] Along the flow path direction, the second connecting flow channel connects two adjacent second heat exchange main flow channels.

[0022] In one possible implementation, the second heat exchange main channel includes multiple second heat exchange branch channels, and the second connecting channel includes multiple second connecting branch channels. Along the flow path direction, one end of each second connecting branch channel is connected to a corresponding second heat exchange branch channel.

[0023] In one possible implementation, the second heat exchange channel is an S-shaped rotary channel.

[0024] In one possible implementation, the second heat exchange channel further includes a second liquid inlet channel and a second liquid outlet channel;

[0025] Along the flow path, one end of the second liquid inlet channel is connected to the outermost second heat exchange main channel on one side of a plurality of second heat exchange main channels arranged side by side, and one end of the second liquid outlet channel is connected to the outermost second heat exchange main channel on the other side.

[0026] In one possible implementation, the second heat exchange channel further includes multiple liquid distribution channels, one end of each of the multiple liquid distribution channels being connected to the second liquid inlet channel along the flow path direction, and the other end of each of the multiple liquid distribution channels being connected to the second heat exchange main channel; and / or

[0027] One end of each of the multiple liquid distribution channels is connected to the second liquid outlet channel, and the other end of each of the multiple liquid distribution channels is connected to the second heat exchange main channel.

[0028] In one possible implementation, a first heat exchange channel is connected to a first inlet and a first outlet, and a second heat exchange channel is connected to a second inlet and a second outlet, wherein the first inlet and the first outlet are located on the same side of the first heat exchange plate; and / or the second inlet and the second outlet are located on the same side of the second heat exchange plate.

[0029] In one possible implementation, the first liquid inlet, the first liquid outlet, the second liquid inlet, and the second liquid outlet are located on the same side of the heat exchange device.

[0030] On the other hand, this application provides a battery pack including a plurality of batteries and the aforementioned heat exchange device, wherein a first heat exchange plate and a second heat exchange plate are disposed on the batteries for cooling and / or heating the batteries.

[0031] In one possible implementation, the battery has an outer peripheral region and a central region, wherein when the battery is in operation, the heat generated by the battery portion corresponding to the outer peripheral region is greater than that of the battery portion corresponding to the central region.

[0032] In one possible implementation, along the length of the battery, the second heat exchange channel is positioned opposite to 1 / 8 to 1 / 4 of the length region of the outer periphery of one side of the battery, and the first heat exchange channel is positioned opposite to 1 / 2 to 3 / 4 of the length region of the middle of the battery.

[0033] In one possible implementation, terminals are provided on the outer peripheral region of the battery.

[0034] In another aspect, this application provides an electrical device, including an electrical appliance and the aforementioned battery pack, the battery pack being used to provide electrical energy to the electrical appliance.

[0035] The heat exchange device, battery pack, and electrical equipment provided in this application feature a first heat exchange channel on a first heat exchange plate and a second heat exchange channel on a second heat exchange plate. These channels are positioned opposite different areas of the battery, with the projections of the first and second heat exchange channels coinciding or offset from each other. To address different operating conditions and battery heat generation characteristics, the channel design divides the flow path into two independent loops, each located on a separate heat exchange plate on a different side of the battery. This ensures that each channel targets a specific battery area for heat exchange. Under certain operating conditions, only the necessary areas of the battery can be cooled using an independent heat exchange plate, thereby improving overall heat exchange efficiency. Furthermore, the overlapping or offset projections reduce the influence between heat exchange plates, minimizing unnecessary heat exchange and allowing for targeted cooling of the battery's heat generation. This improves the efficiency of a single cooler and reduces the overall power consumption of the heat exchange device. Attached Figure Description

[0036] 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the battery pack structure provided in an embodiment of this application;

[0038] Figure 2 for Figure 1 One of the schematic diagrams of the structure of the first heat exchange plate in the heat exchange device of the battery pack shown;

[0039] Figure 3 for Figure 1 The second schematic diagram of the structure of the first heat exchange plate of the heat exchange device in the battery pack shown;

[0040] Figure 4 for Figure 1 One of the schematic diagrams of the structure of the second heat exchange plate in the heat exchange device of the battery pack shown;

[0041] Figure 5 for Figure 1 The second schematic diagram of the structure of the second heat exchange plate in the heat exchange device of the battery pack shown;

[0042] Figure 6 for Figure 1 The diagram shows the structure of the battery in the battery pack.

[0043] Explanation of reference numerals in the attached figures:

[0044] 100 - Heat exchange device; 10 - First heat exchange plate; 11 - First heat exchange channel; 111 - First main heat exchange channel; 112 - First connecting channel; 113 - First heat exchange branch channel; 114 - First liquid inlet channel; 115 - First liquid outlet channel; 12 - First liquid inlet; 13 - First liquid outlet; 20 - Second heat exchange plate; 21 - Second heat exchange channel; 211 - Second main heat exchange channel; 212 - Second connecting channel; 213 - Second heat exchange branch channel; 214 - Second connecting branch channel; 215 - Second liquid inlet channel; 216 - Second liquid outlet channel; 217 - Branch channel; 22 - Second liquid inlet; 23 - Second liquid outlet; 200 - Battery pack; 201 - Battery; 202 - Outer perimeter area; 203 - Middle area; 204 - Terminal column; 205 - Tray. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0046] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0047] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0048] The terms “first,” “second,” and “third” (if any) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0049] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or display that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or display.

[0050] For battery packs, especially power battery packs, liquid cooling plates are typically installed for thermal management. Currently, to meet the high heat and stringent thermal management requirements of battery packs, the common approach is to install liquid cooling plates on both the top and bottom covers of the battery pack.

[0051] However, when used for thermal management of power batteries, it is easy to encounter the problem of high overall load on the heat exchange system and low efficiency of individual coolers, resulting in a reduction in the overall efficiency of the heat exchange system.

[0052] After repeated consideration and verification, the inventors discovered that by dividing the battery pack's dual-cooling-plate structure into two loops, an inner ring and an outer ring, with the outer and inner rings staggered, and considering the direct cooling and heating requirements and the battery's heat generation characteristics—that is, the positive and negative terminals of the battery generate a large amount of heat while the middle area generates less heat—the outer ring loop manages the heat at the positive and negative terminals, while the inner ring loop manages the heat in the middle of the battery. During most of daily use, only the outer ring loop is used for heat management of the high-heat areas at the positive and negative terminals, while the inner ring loop primarily improves the overall temperature uniformity of the battery and provides heating. This improves the efficiency of individual coolers and reduces overall power consumption.

[0053] In view of this, this application provides a heat exchange device for use in a battery pack, the heat exchange device comprising:

[0054] The first heat exchange plate is located on one side of the battery in the battery pack, and the first heat exchange plate is provided with a first heat exchange flow channel.

[0055] The second heat exchange plate is located on the other side of the battery and has a second heat exchange flow channel.

[0056] The first heat exchange channel and the second heat exchange channel are respectively arranged opposite to different areas of the battery, and along the projection direction from the first heat exchange plate to the second heat exchange plate, the projection of the first heat exchange channel and the projection of the second heat exchange channel coincide or are misaligned.

[0057] By setting a first heat exchange channel on a first heat exchange plate and a second heat exchange channel on a second heat exchange plate, and positioning the first and second heat exchange channels opposite to different areas of the battery, with the projections of the first and second heat exchange channels coinciding or offset from each other, the flow channel design is divided into two independent loops to meet different operating conditions and battery heat generation characteristics. These two independent loops are located on two separate heat exchange plates on different sides of the battery. This ensures that each flow channel provides heat exchange for a specific battery area, allowing cooling of only necessary areas of the battery through independent heat exchange plates, thereby improving overall heat exchange efficiency. Furthermore, because the two heat exchange plates are located on different sides of the battery and the projections of the heat exchange channels coincide or are offset, the influence between the heat exchange plates is reduced, unnecessary heat exchange is minimized, and targeted cooling and heat dissipation are performed on the battery's heat generation, thus improving the efficiency of a single cooler and reducing the overall power consumption of the heat exchange device.

[0058] The contents of this application will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can have a clearer and more detailed understanding of the contents of this application.

[0059] Figure 1 This is a schematic diagram of the battery pack provided in an embodiment of this application. Figure 2 for Figure 1 One of the schematic diagrams of the structure of the first heat exchange plate in the heat exchange device of the battery pack shown. Figure 3 for Figure 1 The second schematic diagram shows the structure of the first heat exchange plate in the heat exchange device of the battery pack. Figure 4 for Figure 1 One of the schematic diagrams of the structure of the second heat exchange plate in the heat exchange device of the battery pack shown. Figure 5 for Figure 1 The second schematic diagram shows the structure of the second heat exchange plate in the heat exchange device of the battery pack. Figure 6 for Figure 1 The diagram shows the structure of the battery in the battery pack.

[0060] like Figure 1 , Figure 2 and Figure 6 As shown in the embodiment of this application, the heat exchange device 100 is used in a battery pack 200. The battery pack 200 includes a battery 201 and the heat exchange device 100. The heat exchange device 100 is used to cool or heat the battery 201.

[0061] like Figure 2 and Figure 4 As shown, the heat exchange device 100 includes a first heat exchange plate 10 and a second heat exchange plate 20. The first heat exchange plate 10 is disposed on one side of the battery 201 in the battery pack 200, and the second heat exchange plate 20 is disposed on the other side of the battery 201.

[0062] The first heat exchange plate 10 is provided with a first heat exchange channel 11. The second heat exchange plate 20 is provided with a second heat exchange channel 21.

[0063] The first heat exchange channel 11 and the second heat exchange channel 21 are respectively arranged opposite to different areas of the battery 201, and along the projection direction from the first heat exchange plate 10 to the second heat exchange plate 20, the projection of the first heat exchange channel 11 and the projection of the second heat exchange channel 21 are either coincident or misaligned.

[0064] By providing a first heat exchange channel 11 on the first heat exchange plate 10 and a second heat exchange channel 21 on the second heat exchange plate 20, and positioning the first heat exchange channel 11 and the second heat exchange channel 21 opposite to different areas of the battery 201, with the projections of the first heat exchange channel 11 and the second heat exchange channel 21 overlapping or offset from each other, the flow channel design is divided into two independent loops to meet different operating conditions and battery heat generation characteristics. These two independent loops are located on two separate heat exchange plates, positioned on different sides of the battery 201. This ensures that under certain operating conditions, only the necessary areas of the battery 201 can be cooled via independent heat exchange plates, thereby improving overall heat exchange efficiency and ensuring battery temperature uniformity. Furthermore, the overlapping or offset projections reduce the influence between heat exchange plates, allowing for targeted cooling and heat dissipation of the battery's heat generation, thus improving the efficiency of a single cooler and reducing the overall power consumption of the heat exchange device 100.

[0065] In one possible implementation, the first heat exchange plate 10 is located below the battery 201 in the battery pack 200. The second heat exchange plate 20 is located above the battery 201.

[0066] Along the third direction z, the first heat exchange plate 10 and the second heat exchange plate 20 are respectively disposed on the battery 201, and the first heat exchange channel 11 and the second heat exchange channel 21 are respectively disposed opposite to different areas of the battery 201, for cooling and / or heating different areas of the battery 201 respectively.

[0067] Please also refer to Figure 6 The battery 201 has an outer peripheral region 202 and a central region 203. A terminal post 204 is provided on the outer peripheral region 202 of the battery 201.

[0068] Along the first direction x, the two outer peripheral regions 202 of the battery 201 are located on both sides of the central region 203.

[0069] Specifically, when battery 201 is in an operational state, the heat generated by the portion of battery 201 corresponding to the outer peripheral region 202 is greater than that of the portion of battery 201 corresponding to the central region 203. The aforementioned operational state of battery 201 refers to the battery being charged or discharged.

[0070] In one possible implementation, the battery pack 200 further includes a tray 205. A first heat exchange plate 10 or a second heat exchange plate 20 is connected to the tray 205, and a receiving space for accommodating the battery 201 is formed in the tray 205.

[0071] In one possible implementation, one of the first heat exchange channel 11 and the second heat exchange channel 21 is disposed opposite to the outer peripheral region 202 of the battery 201, and the other is disposed opposite to the central region 203 of the battery 201.

[0072] To address the requirements of direct cooling and heating and the heat generation characteristics of battery 201, the flow channel design is divided into two loops: an inner loop and an outer loop. The outer loop manages the thermal properties of the positive and negative terminals of battery 201, while the inner loop manages the thermal properties of the middle section of battery 201. During most daily use, only the outer loop is used to manage the high-heat areas of the positive and negative terminals of battery 201, providing targeted cooling and heat dissipation. This improves the efficiency of a single cooler, requiring only half the power of the original thermal management system under the same operating conditions. The overall power of the heat exchange device 100 is reduced. The inner and outer loops work independently to improve the overall temperature uniformity and heating function of battery 201, resulting in superior temperature uniformity performance. Furthermore, the inner and outer cold plates are arranged separately, leading to lower flow resistance and a more rational flow channel distribution.

[0073] When the heating mode is activated in a low-temperature environment (in some embodiments, the low-temperature condition is -10℃), the battery 201 is directly heated through the first heat exchange channel 11 or the second heat exchange channel 21 corresponding to the central region 203 on the first heat exchange plate 10 or the second heat exchange plate 20, and the battery 201 is protected by its self-heating function.

[0074] When the first heat exchange channel 11 or the second heat exchange channel 21, which is positioned opposite to the outer peripheral region 202, is opened, the time required for fast charging of the room temperature battery 201 and the temperature distribution of the battery pack 200 are not significantly different from those when both the inner and outer rings are opened. Under low temperature slow charging heating conditions, when the first heat exchange channel 11 or the second heat exchange channel 21, which is positioned opposite to the middle region 203, is opened, the temperature uniformity performance is better compared to when both the inner and outer rings are opened.

[0075] In one possible implementation, the first heat exchange channel 11 is disposed opposite to the central region 203 of the battery 201, and the second heat exchange channel 21 is disposed opposite to the outer peripheral region 202 of the battery 201.

[0076] Since the inner circulation primarily functions to exchange heat in the middle of battery 201, it can be positioned below battery pack 200, specifically on the first heat exchange channel 11 of the first heat exchange plate 10, corresponding to the middle region 203. The self-heating of battery 201 is concentrated at the positive and negative terminals (i.e., the outer periphery 202 where the terminals 204 are located). The middle region 203 of battery 201 experiences less heat generation compared to the outer periphery 202. Therefore, under direct heating conditions, the inner circulation channel can be prioritized for heating the middle region 203 of battery 201. Heat transfer from bottom to top is faster; hence, the inner circulation is positioned below battery pack 200.

[0077] Meanwhile, during the installation of the battery pack 200, the lower cooling plate is typically integrated with the tray 205 using friction welding, while the upper cooling plate is fixed using bolt positioning holes. Since friction welding requires a larger and flatter edge plane to weld with the tray 205, and the edge of the inner circulation flow channel plate has ample space, facilitating installation and welding, the first heat exchange flow channel 11 on the first heat exchange plate 10 located below the battery 201 is positioned opposite to the central region 203 of the battery 201.

[0078] In other possible implementations, the first heat exchange channel 11 may be disposed opposite to the outer peripheral region 202 of the battery 201, and the second heat exchange channel 21 may be disposed opposite to the middle region 203 of the battery 201.

[0079] In one possible implementation, the distribution area of ​​the first heat exchange channel 11 is greater than the distribution area of ​​the second heat exchange channel 21.

[0080] Typically, when the battery 201 is in operation, the central region 203 of the battery 201 generates less heat and is relatively large; while the outer peripheral region 202 of the battery 201 generates more heat and is relatively small. Therefore, setting the distribution area of ​​the first heat exchange channel 11, which is positioned opposite to the central region 203, to be relatively large helps to effectively dissipate the heat generated in the central region, prevent local overheating, and thus improve the heat exchange effect on different regions of the battery 201.

[0081] In one possible implementation, along the length of the battery 201, the second heat exchange channel 21 is positioned opposite to 1 / 8 to 1 / 4 of the length region of the outer periphery of one side of the battery 201, that is, along the length of the battery 201, the second heat exchange channel 21 is positioned opposite to 1 / 4 to 1 / 2 of the length region of the battery 201. The first heat exchange channel 11 is positioned opposite to 1 / 2 to 3 / 4 of the middle length region of the battery 201.

[0082] like Figure 6As shown, along the first direction x, positive and negative electrode posts 204 are respectively arranged on both sides of the battery 201. The heat generation in the vicinity of the positive and negative electrodes is significantly higher than that in other parts, and the heat generation varies among different batteries 201. Therefore, the area where the heat generation is significantly different from other parts is designated as the outer peripheral region 202, and the remaining area is designated as the central region 203.

[0083] In one possible implementation, the first heat exchange channel 11 includes a plurality of spaced channels, and the second heat exchange channel 21 includes a plurality of spaced channels.

[0084] By designing the heat exchange channels as multiple spaced channels, the contact area between the fluid and the heat exchange plate can be increased, thereby improving heat exchange efficiency. Simultaneously, the spaced channels facilitate a more uniform temperature distribution. Through the synergistic effect of multiple channels, the formation of localized hot spots can be avoided, ensuring a more uniform temperature across the entire battery 201. The existence of multiple channels means that even if one channel becomes blocked or malfunctions, the others can continue to operate, thus improving system reliability and redundancy.

[0085] In one possible implementation, the spacing between two adjacent channels in the first heat exchange channel 11 is greater than the spacing between two adjacent channels in the second heat exchange channel 21.

[0086] Because the central region 203 of battery 201 generates less heat, while the outer peripheral region 202 of battery 201 generates more heat, the outer peripheral region 202 requires more heat exchange. Therefore, the spacing between the channels in the second heat exchange channel 21, which is arranged opposite to the outer peripheral region 202, is set to be smaller, that is, the channels are arranged closely and the gaps are small, thereby strengthening the heat exchange with the outer peripheral region 202 and making the overall temperature more uniform.

[0087] like Figure 2 and Figure 3 As shown, in one possible implementation, the first heat exchange channel 11 includes a plurality of first heat exchange main channels 111 and a first connecting channel 112. The plurality of first heat exchange main channels 111 are arranged side by side, and the first heat exchange main channels 111 are arranged opposite to the central region 203 of the battery 201. Along the flow path direction, the first connecting channel 112 connects two adjacent first heat exchange main channels 111.

[0088] The multiple first heat exchange main channels 111 arranged side by side increase the contact area between the fluid and the heat exchange plate, thereby improving the overall heat exchange efficiency. Connecting adjacent first heat exchange main channels 111 through first connecting channels 112 ensures uniform fluid distribution throughout the system.

[0089] The battery pack 200 includes multiple batteries 201. Along the second direction y, the multiple batteries 201 are stacked sequentially to form a battery module, thereby connecting the outer peripheral regions 202 and the central region 203 of the multiple batteries 201. That is, along the first direction x, the two sides of the battery module are the outer peripheral regions 202, and the middle of the battery module is the central region 203. Along the first direction x, the multiple battery modules are arranged side-by-side.

[0090] Along the first direction x, multiple first heat exchange main channels 111 are arranged side by side, and each of the multiple first heat exchange main channels 111 corresponds to a multiple battery module. The first heat exchange main channels 111 are used to exchange heat in the middle region 203 of the corresponding battery module, that is, the first heat exchange main channels 111 are used to exchange heat in the middle region 203 of the multiple batteries 201 stacked sequentially along the second direction y.

[0091] Along the first direction x, the first connecting channel 112 is disposed between two adjacent first heat exchange main channels 111, and the two ends of the first connecting channel 112 are respectively connected to the opposite side of the two adjacent first heat exchange main channels 111.

[0092] Battery 201 can be in module form or without module form.

[0093] In one possible implementation, the first heat exchange main channel 111 includes a plurality of first heat exchange branch channels 113. Along the flow path direction, one end of the first connecting channel 112 is connected to a plurality of first heat exchange branch channels 113 of the same first heat exchange main channel 111.

[0094] Multiple first heat exchange branch channels 113 of the same first heat exchange main channel 111 are arranged side by side, and along the first direction x, one end of the first connecting channel 112 is connected to the multiple first heat exchange branch channels 113 of the same first heat exchange main channel 111.

[0095] The design of the first heat exchange channel 113 increases the contact area between the fluid and the heat exchange plate, promoting more efficient heat transfer. The presence of the first heat exchange channel 113 helps to achieve a more uniform temperature distribution. Through the synergistic effect of multiple first heat exchange channels 113, the formation of local hot spots can be effectively avoided, ensuring a more uniform temperature throughout the system.

[0096] In one possible implementation, the first heat exchange diversion channel 113 is an S-shaped rotary channel.

[0097] The S-shaped rotary flow channel increases the contact area between the fluid and the heat exchange plate through its tortuous path, making the fluid's path within the channel longer. This increases the fluid's residence time and improves heat exchange efficiency. Because the fluid constantly changes direction within the S-shaped flow channel, heat can be distributed more evenly throughout the channel, reducing the formation of localized hot spots and ensuring uniform temperature distribution.

[0098] The first heat exchange diversion channel 113 extends along the second direction y and rotates along the first direction x.

[0099] The first heat exchange channel 113 extending along the second direction y can simultaneously exchange heat with multiple batteries 201 of the same battery module, thereby improving the uniformity of heat dissipation of the battery module.

[0100] In one possible implementation, the first heat exchange channel 11 further includes a first liquid inlet channel 114 and a first liquid outlet channel 115. Along the flow path direction, one end of the first liquid inlet channel 114 is connected to the outermost first heat exchange main channel 111 on one side of a plurality of first heat exchange main channels 111 arranged side by side, and one end of the first liquid outlet channel 115 is connected to the outermost first heat exchange main channel 111 on the other side.

[0101] Fluid is introduced into the outermost first heat exchange main channel 111 on one side through the first inlet channel 114. The fluid can be evenly distributed into each of the first heat exchange main channels 111, ensuring that the fluid can effectively cover the entire heat exchange area and improve heat exchange efficiency. The arrangement of the inlet and outlet channels allows the fluid to flow along a predetermined path, entering from one side and passing through multiple first heat exchange main channels 111 before exiting from the other side.

[0102] Along the first direction x, a plurality of first heat exchange branch channels 113 of the outermost first heat exchange main channel 111 on one side are connected to one end of the first liquid inlet channel 114, and a plurality of first heat exchange branch channels 113 of the outermost first heat exchange main channel 111 on the other side are connected to one end of the first liquid outlet channel 115.

[0103] In one possible implementation, the first heat exchange channel 11 is connected to a first liquid inlet 12 and a first liquid outlet 13.

[0104] The other end of the first liquid inlet channel 114 is connected to the first liquid inlet 12. The other end of the first liquid outlet channel 115 is connected to the first liquid outlet 13.

[0105] In one possible implementation, the first liquid inlet 12 and the first liquid outlet 13 are located on the same side of the first heat exchange plate 10.

[0106] Having the inlet and outlet on the same side simplifies pipeline layout and installation, reduces pipeline length and complexity, and lowers the difficulty of installation and maintenance.

[0107] Optionally, in the first direction x, the first liquid inlet 12 and the first liquid outlet 13 are located on the same side of the first heat exchange plate 10.

[0108] Along the first direction x, the first liquid inlet channel 114 and the first liquid outlet channel 115 extend to the same side of the first heat exchange plate 10 and are respectively connected to the first liquid inlet 12 and the first liquid outlet 13 located on the same side of the first heat exchange plate 10.

[0109] Optionally, the first heat exchange channel 11 includes three first heat exchange main channels 111 and two first connecting channels 112. Each first heat exchange main channel 111 includes three first heat exchange branch channels 113, and the two ends of the first connecting channels 112 are respectively connected to the three first heat exchange branch channels 113 of the two different first heat exchange main channels 111.

[0110] like Figure 4 and Figure 5 As shown, in one possible implementation, the second heat exchange channel 21 includes a plurality of second heat exchange main channels 211 and a second connecting channel 212. The plurality of second heat exchange main channels 211 are arranged side by side, and the second heat exchange main channels 211 are arranged opposite to the outer peripheral region 202 of the battery 201. Along the flow path direction, the second connecting channel 212 connects two adjacent second heat exchange main channels 211.

[0111] The multiple second heat exchange main channels 211 arranged side by side increase the contact area between the fluid and the heat exchange plate, thereby improving the overall heat exchange efficiency. Connecting adjacent second heat exchange main channels 211 through second connecting channels 212 ensures uniform fluid distribution throughout the system.

[0112] Along the first direction x, multiple second heat exchange main channels 211 are arranged side by side, and each of the multiple second heat exchange main channels 211 corresponds one-to-one with the outer peripheral regions 202 on both sides of multiple battery modules. The second heat exchange main channels 211 are used to exchange heat on the outer peripheral regions 202 of the corresponding battery modules, that is, the second heat exchange main channels 211 are used to exchange heat on the outer peripheral regions 202 of the multiple batteries 201 stacked sequentially along the second direction y.

[0113] Along the first direction x, the second connecting channel 212 is disposed between two adjacent second heat exchange main channels 211, and the two ends of the second connecting channel 212 are respectively connected to the opposite side of the two adjacent second heat exchange main channels 211.

[0114] In one possible implementation, the second heat exchange main channel 211 includes a plurality of second heat exchange branch channels 213. The second connecting channel 212 includes a plurality of second connecting branch channels 214. Along the flow path direction, one end of each second connecting branch channel 214 is connected to a corresponding second heat exchange branch channel 213.

[0115] The design of the second heat exchange channel 213 increases the contact area between the fluid and the heat exchange plate, promoting more efficient heat transfer. The presence of the second heat exchange channel 213 helps to achieve a more uniform temperature distribution. Through the synergistic effect of multiple second heat exchange channels 213, the formation of local hot spots can be effectively avoided, ensuring a more uniform temperature throughout the system.

[0116] Multiple second heat exchange branch channels 213 of the same second heat exchange main channel 211 are arranged side by side, and along the first direction x, one end of the second connecting branch channel 214 is connected to one of the second heat exchange branch channels 213 of one of the second heat exchange main channels 211, and the other end is connected to one of the second heat exchange branch channels 213 of another second heat exchange main channel 211. That is, the second connecting branch channel 214 and the second heat exchange branch channel 213 are connected in series.

[0117] Since the outer peripheral region 202 of the battery 201 generates a large amount of heat, the second heat exchange channel 21 is set as a series channel to increase local flow resistance and enhance heat exchange.

[0118] In one possible implementation, the second heat exchange diversion channel 213 is an S-shaped rotary channel.

[0119] The S-shaped rotary flow channel increases the contact area between the fluid and the heat exchange plate through its tortuous path, making the fluid's path within the channel longer. This increases the fluid's residence time and improves heat exchange efficiency. Because the fluid constantly changes direction within the S-shaped flow channel, heat can be distributed more evenly throughout the channel, reducing the formation of localized hot spots and ensuring uniform temperature distribution.

[0120] The second heat exchange diversion channel 213 extends along the second direction y and rotates along the first direction x.

[0121] The second heat exchange channel 213, which extends along the second direction y, can simultaneously exchange heat with multiple batteries 201 of the same battery module, thereby improving the uniformity of heat dissipation of the battery module.

[0122] In one possible implementation, the second heat exchange channel 21 further includes a second liquid inlet channel 215 and a second liquid outlet channel 216. Along the flow path direction, one end of the second liquid inlet channel 215 is connected to the outermost second heat exchange main channel 211 on one side of a plurality of second heat exchange main channels 211 arranged side by side, and one end of the second liquid outlet channel 216 is connected to the outermost second heat exchange main channel 211 on the other side.

[0123] Fluid is introduced into the outermost second heat exchange main channel 211 on one side through the second inlet channel 215. The fluid can be evenly distributed into each of the second heat exchange main channels 211, ensuring that the fluid can effectively cover the entire heat exchange area and improve heat exchange efficiency. The arrangement of the inlet and outlet channels allows the fluid to flow along a predetermined path, entering from one side and passing through multiple second heat exchange main channels 211 before exiting from the other side.

[0124] Along the first direction x, a plurality of second heat exchange branch channels 213 of the outermost second heat exchange main channel 211 on one side are connected to one end of the second liquid inlet channel 215, and a plurality of second heat exchange branch channels 213 of the outermost second heat exchange main channel 211 on the other side are connected to one end of the second liquid outlet channel 216.

[0125] In one possible implementation, the second heat exchange channel 21 further includes a plurality of liquid distribution channels 217. Along the flow path direction, one end of each of the plurality of liquid distribution channels 217 is connected to the second liquid inlet channel 215, and the other end of each of the plurality of liquid distribution channels 217 is connected to the second heat exchange main channel 211.

[0126] In one possible implementation, one end of each of the multiple liquid distribution channels 217 is connected to the second liquid outlet channel 216, and the other end of each of the multiple liquid distribution channels 217 is connected to the second heat exchange main channel 211.

[0127] By setting up the liquid distribution channel 217, the cooling medium in the second heat exchange channel 21 can be split before entering the second heat exchange main channel 211 or merged when flowing out of the second heat exchange main channel 211, thereby improving the effect of splitting and merging and ensuring that the fluid is evenly distributed throughout the heat exchange area.

[0128] In one possible implementation, the flow channel of the second heat exchange channel 21 can also be configured as a turbulent flow channel, thereby enhancing the disturbance of the heat exchange medium and increasing the heat exchange capacity.

[0129] Specifically, along the flow direction, the flow channel of the second heat exchange channel 21 can be wavy, serpentine, W-shaped, V-shaped, etc., and the effect of enhancing heat exchange can also be achieved by adding turbulence-inducing components to the conventional direct flow channel.

[0130] In one possible implementation, the second heat exchange channel 21 is connected to a second liquid inlet 22 and a second liquid outlet 23.

[0131] The other end of the second liquid inlet channel 215 is connected to the second liquid inlet 22. The other end of the second liquid outlet channel 216 is connected to the second liquid outlet 23.

[0132] In one possible implementation, the second liquid inlet 22 and the second liquid outlet 23 are located on the same side of the second heat exchange plate 20.

[0133] Having the inlet and outlet on the same side simplifies pipeline layout and installation, reduces pipeline length and complexity, and lowers the difficulty of installation and maintenance.

[0134] Optionally, in the first direction x, the second liquid inlet 22 and the second liquid outlet 23 are located on the same side of the second heat exchange plate 20.

[0135] Along the first direction x, the second liquid inlet channel 215 and the second liquid outlet channel 216 extend to the same side of the second heat exchange plate 20 and are respectively connected to the second liquid inlet 22 and the second liquid outlet 23 located on the same side of the second heat exchange plate 20.

[0136] In one possible implementation, the first liquid inlet 12, the first liquid outlet 13, the second liquid inlet 22, and the second liquid outlet 23 are located on the same side of the heat exchange device 100.

[0137] Placing the first liquid inlet 12, the first liquid outlet 13, the second liquid inlet 22, and the second liquid outlet 23 on the same side of the heat exchange device 100 helps to simplify the pipeline layout, save space, improve maintenance efficiency, and facilitate unified management.

[0138] Optionally, in the first direction x, the first liquid inlet 12, the first liquid outlet 13, the second liquid inlet 22 and the second liquid outlet 23 are located on the same side of the heat exchange device 100.

[0139] In one possible implementation, the first liquid inlet 12, the first liquid outlet 13, the second liquid inlet 22, and the second liquid outlet 23 are all fixed on the tray 205.

[0140] The first liquid inlet 12, the first liquid outlet 13, the second liquid inlet 22, and the second liquid outlet 23 are fixed to the tray 205 by means of alignment welding.

[0141] In one possible implementation, along the projection direction from the first heat exchange plate 10 to the second heat exchange plate 20, that is, in the plane containing the first direction x and the second direction y, the first heat exchange channel 11 and the second heat exchange channel 21 are misaligned with each other.

[0142] The first heat exchange channel 11 and the second heat exchange channel 21 are staggered, minimizing thermal interference between the two channels. Each channel can independently and effectively exchange heat without being directly affected by the other channel, thereby enhancing heat exchange efficiency.

[0143] Preferably, the first heat exchange channel 11 and the second heat exchange channel 21 are completely misaligned.

[0144] By using the completely misaligned first heat exchange channel 11 and second heat exchange channel 21, the heat dissipation of the battery 201 can be precisely controlled, thereby reducing the overall power consumption.

[0145] Under cooling conditions, the second heat exchange channel 21 is opened at 35°C, and the first heat exchange channel 11 is opened at 45°C. Because the outer peripheral area 202 of the battery 201 covered by the second heat exchange channel 21 heats up more rapidly, its opening temperature is lower than that of the first heat exchange channel 11. During the working cycle, after the outer peripheral area 202 reaches 35°C, although the second heat exchange channel 21 has been activated, it only delays the temperature rise of the outer peripheral area 202. After a relatively long period of time, the central area 203 will reach 45°C. At this time, the temperature of the outer peripheral area 202 will be slightly higher than 45°C, and the first heat exchange channel 11 will be opened for circulation. The heat exchange of the first heat exchange channel 11 is slower than that of the second heat exchange channel 21, so that the overall temperature of the battery 201 tends to be uniform.

[0146] Under heating conditions: In low-temperature conditions, self-heating technology is used to raise the temperature of the positive and negative electrode areas (outer peripheral area 202) of battery 201; at this time, only the first heat exchange channel 11 (middle area 203) is activated for direct heating to heat the middle area 203 of battery 201, thereby balancing the temperature rise at the positive and negative electrodes of battery 201 caused by self-heating of battery 201 and making battery 201 heat up evenly.

[0147] The heat exchange device 100 provided in this application embodiment includes a first heat exchange plate 10 and a second heat exchange plate 20. The first heat exchange plate 10 is disposed on one side of the battery 201 in the battery pack 200 and is provided with a first heat exchange channel 11. The second heat exchange plate 20 is disposed on the other side of the battery 201 and is provided with a second heat exchange channel 21. The first heat exchange channel 11 and the second heat exchange channel 21 are respectively disposed opposite to different areas of the battery 201, and along the projection direction from the first heat exchange plate 10 to the second heat exchange plate 20, the projection of the first heat exchange channel 11 and the projection of the second heat exchange channel 21 are either coincident or misaligned.

[0148] By providing a first heat exchange channel 11 on the first heat exchange plate 10 and a second heat exchange channel 21 on the second heat exchange plate 20, and arranging the first heat exchange channel 11 and the second heat exchange channel 21 opposite to different areas of the battery 201, with the projections of the first heat exchange channel 11 and the second heat exchange channel 21 coinciding or offset from each other, the flow channel design is divided into two independent loops to meet the requirements of direct cooling and heating and the heat generation characteristics of the battery 201. These two independent loops are located on two separate heat exchange plates, which are positioned on different sides of the battery 201, ensuring that each flow channel provides heat exchange for a specific battery area. This ensures that under certain operating conditions, only one heat exchange plate is needed to cool the necessary area of ​​the battery 201. Furthermore, the overlapping or offset projections reduce the influence between heat exchange plates, minimizing unnecessary heat exchange and allowing for targeted cooling of the battery 201, thereby improving the efficiency of a single cooler and reducing the overall power consumption of the heat exchange device 100.

[0149] In addition, this application embodiment also provides a battery pack 200, including a battery 201 and the heat exchange device 100 described above. A first heat exchange plate 10 and a second heat exchange plate 20 are attached to the battery 201 for cooling and / or heating the battery 201.

[0150] In one possible implementation, battery 201 has an outer peripheral region 202 and a central region 203, with the central region 203 located in the middle of battery 201. The outer peripheral region 202 is located on both sides of battery 201.

[0151] The heat generated by the battery 201 portion corresponding to the outer peripheral region 202 is greater than that of the battery 201 portion corresponding to the central region 203.

[0152] One of the first heat exchange channel 11 and the second heat exchange channel 21 is disposed opposite to the outer peripheral region 202 of the battery 201, and the other is disposed opposite to the central region 203 of the battery 201.

[0153] With the above settings, during most of the daily use, only one heat exchange plate is used to manage the heat of the outer peripheral area 202 of the battery 201, which can improve the heat exchange efficiency of the heat exchange device 100.

[0154] In one possible implementation, multiple batteries 201 are arranged sequentially along the thickness direction of the batteries 201 to form a battery module. The outer peripheral regions 202 of the multiple batteries 201 are connected to form the outer peripheral region 202 of the battery module. The central regions 203 of the multiple batteries 201 are connected to form the central region 203 of the battery module. The outer peripheral regions 202 of the battery module are located on both sides of the central region 203 of the battery module.

[0155] One of the first heat exchange channel 11 and the second heat exchange channel 21 is disposed opposite to the outer peripheral region 202 of the battery module, and the other is disposed opposite to the central region 203 of the battery module.

[0156] In one possible implementation, a terminal post 204 is provided on the outer peripheral region 202 of the battery 201.

[0157] Specifically, since the terminal 204 is connected to an external power supply or load, the outer peripheral region 202 where the terminal 204 of the battery 201 is located heats up more severely than the central region 203. Therefore, the terminal 204 is provided on the outer peripheral region 202 of the battery 201 to improve the heat exchange effect of this part.

[0158] Furthermore, the terminals 204 of the battery 201 can be disposed on both sides along its length. In this case, the battery 201 includes a central region 203 located in the middle and outer peripheral regions 202 located on both sides. One of the first heat exchange channel 11 and the second heat exchange channel 21 is disposed opposite to the outer peripheral region 202 of the battery module, and the other is disposed opposite to the central region 203 of the battery module.

[0159] In one possible implementation, the battery pack 200 further includes a tray 205. A first heat exchange plate 10 or a second heat exchange plate 20 is connected to the tray 205, and a receiving space for accommodating the battery 201 is formed in the tray 205.

[0160] This application also provides an electrical device, including an electrical appliance and a battery pack 200 as described in any of the above embodiments. The battery pack 200 is used to provide electrical energy to the electrical appliance.

[0161] The electrical equipment in this application embodiment can be a vehicle, such as a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle, and a new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. Accordingly, the electrical device can be the vehicle's drive mechanism or the vehicle's control system.

[0162] In addition, electrical equipment can also serve as other energy storage devices, such as mobile phones, portable devices, laptops, electric toys, power tools, ships, and spacecraft. Among these, spacecraft can include airplanes, rockets, space shuttles, or spacecraft.

[0163] Given that the electrical device in this embodiment includes the battery pack 200 described in any of the above embodiments, the structure and beneficial effects of the electrical device including the battery pack 200 will not be described in detail here.

[0164] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A heat exchange device, characterized in that, For use in a battery pack (200), the heat exchange device includes: The first heat exchange plate (10) is located on one side of the battery (201) in the battery pack (200), and the first heat exchange plate (10) is provided with a first heat exchange channel (11). The second heat exchange plate (20) is located on the other side of the battery (201), and the second heat exchange plate (20) is provided with a second heat exchange channel (21). The first heat exchange channel (11) and the second heat exchange channel (21) are respectively arranged opposite to different regions of the battery (201), and along the projection direction from the first heat exchange plate (10) to the second heat exchange plate (20), the projection of the first heat exchange channel (11) and the projection of the second heat exchange channel (21) are either coincident or misaligned.

2. The heat exchange device according to claim 1, characterized in that, The first heat exchange channel (11) is disposed opposite to the middle region (203) of the battery (201), and the second heat exchange channel (21) is disposed opposite to the outer peripheral region (202) of the battery (201).

3. The heat exchange device according to claim 1, characterized in that, The first heat exchange channel (11) is located below the battery (201), and the second heat exchange channel (21) is located above the battery (201).

4. The heat exchange device according to claim 1, characterized in that, The distribution area of ​​the first heat exchange channel (11) is greater than that of the second heat exchange channel (21).

5. The heat exchange device according to claim 1, characterized in that, The first heat exchange channel (11) includes multiple channels spaced apart, and the second heat exchange channel (21) includes multiple channels spaced apart.

6. The heat exchange device according to claim 5, characterized in that, The spacing between two adjacent channels in the first heat exchange channel (11) is greater than the spacing between two adjacent channels in the second heat exchange channel (21).

7. The heat exchange device according to claim 1, characterized in that, The first heat exchange channel (11) includes a plurality of first heat exchange main channels (111) and a first connecting channel (112), and the plurality of first heat exchange main channels (111) are arranged side by side; Along the flow path direction, the first connecting flow channel (112) connects to two adjacent first heat exchange main flow channels (111).

8. The heat exchange device according to claim 7, characterized in that, The first heat exchange main channel (111) includes a plurality of first heat exchange branch channels (113). Along the flow path direction, one end of the first connecting channel (112) is connected to a plurality of first heat exchange branch channels (113) of the same first heat exchange main channel (111).

9. The heat exchange device according to claim 8, characterized in that, The first heat exchange diversion channel (113) is an S-shaped rotary channel.

10. The heat exchange device according to claim 7, characterized in that, The first heat exchange channel (11) further includes a first liquid inlet channel (114) and a first liquid outlet channel (115). Along the flow path direction, one end of the first liquid inlet channel (114) is connected to the outermost first heat exchange main channel (111) on one side of a plurality of first heat exchange main channels (111) arranged side by side, and one end of the first liquid outlet channel (115) is connected to the outermost first heat exchange main channel (111) on the other side.

11. The heat exchange device according to claim 1, characterized in that, The second heat exchange channel (21) includes a plurality of second heat exchange main channels (211) and a second connecting channel (212), and the plurality of second heat exchange main channels (211) are arranged side by side; Along the flow path direction, the second connecting flow channel (212) connects two adjacent second heat exchange main flow channels (211).

12. The heat exchange device according to claim 11, characterized in that, The second heat exchange main channel (211) includes multiple second heat exchange branch channels (213), and the second connecting channel (212) includes multiple second connecting branch channels (214). Along the flow path direction, one end of the second connecting branch channel (214) is connected to the second heat exchange branch channel (213) in a one-to-one correspondence.

13. The heat exchange device according to claim 12, characterized in that, The second heat exchange diversion channel (213) is an S-shaped rotary channel.

14. The heat exchange device according to claim 11, characterized in that, The second heat exchange channel (21) also includes a second liquid inlet channel (215) and a second liquid outlet channel (216). Along the flow path direction, one end of the second liquid inlet channel (215) is connected to the outermost second heat exchange main channel (211) on one side of a plurality of second heat exchange main channels (211) arranged side by side, and one end of the second liquid outlet channel (216) is connected to the outermost second heat exchange main channel (211) on the other side.

15. The heat exchange device according to claim 14, characterized in that, The second heat exchange channel (21) further includes a plurality of liquid distribution channels (217). Along the flow path direction, one end of each of the plurality of liquid distribution channels (217) is connected to the second liquid inlet channel (215), and the other end of each of the plurality of liquid distribution channels (217) is connected to the second heat exchange main channel (211); and / or One end of each of the plurality of liquid distribution channels (217) is connected to the second liquid outlet channel (216), and the other end of each of the plurality of liquid distribution channels (217) is connected to the second heat exchange main channel (211).

16. The heat exchange device according to any one of claims 1-15, characterized in that, The first heat exchange channel (11) is connected to a first liquid inlet (12) and a first liquid outlet (13), and the second heat exchange channel (21) is connected to a second liquid inlet (22) and a second liquid outlet (23). The first liquid inlet (12) and the first liquid outlet (13) are located on the same side of the first heat exchange plate (10); and / or the second liquid inlet (22) and the second liquid outlet (23) are located on the same side of the second heat exchange plate (20).

17. The heat exchange device according to claim 16, characterized in that, The first liquid inlet (12), the first liquid outlet (13), the second liquid inlet (22) and the second liquid outlet (23) are located on the same side of the heat exchange device (100).

18. A battery pack, characterized in that, It includes a plurality of batteries (201) and a heat exchange device (100) as described in any one of claims 1-17, wherein the first heat exchange plate (10) and the second heat exchange plate (20) are disposed on the batteries (201) for cooling and / or heating the batteries (201).

19. The battery pack according to claim 18, characterized in that, The battery (201) has an outer peripheral region (202) and a middle region (203), wherein, when the battery (201) is in the working state, the heat generated by the battery portion corresponding to the outer peripheral region (202) is greater than that of the battery portion corresponding to the middle region (203).

20. The battery pack according to claim 19, characterized in that, Along the length direction of the battery (201), the second heat exchange channel (21) is arranged opposite to 1 / 8-1 / 4 of the length region of the outer periphery of one side of the battery (201), and the first heat exchange channel (11) is arranged opposite to 1 / 2-3 / 4 of the middle length region of the battery (201).

21. The battery pack according to claim 20, characterized in that, The battery (201) has a terminal post (204) on its outer peripheral region (202).

22. An electrical appliance, characterized in that, It includes an electrical device and a battery pack (200) as described in any one of claims 18-21, the battery pack (200) being used to provide electrical power to the electrical device.

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