Liquid cooling plate and battery pack

Abstract

The utility model relates to the technical field of lithium batteries, in particular to a liquid cooling plate and a battery pack. The liquid cooling plate comprises a main runner plate and a sub-runner plate; the sub-runner plate comprises a plurality of sub-runners arranged in the first direction, and each sub-runner is provided with a first connector and a second connector on the same side of the sub-runner plate; the main runner plate comprises a first runner and a second runner; the first runner is provided with a plurality of first connecting ports on the same side of the main runner plate, and the plurality of first connecting ports are respectively communicated with the plurality of first interfaces; the second runner is provided with a plurality of second connecting ports on the same side of the main runner plate, and the plurality of second connecting ports are respectively communicated with the plurality of second interfaces; a first main connector is arranged at one end of the first flow channel, a second main connector is arranged at one end of the second flow channel, and the first main connector and the second main connector are arranged at the two ends in the first direction respectively. According to the liquid cooling plate and the battery pack, the problems that an existing liquid cooling plate is large in flow channel resistance and poor in temperature equalizing effect are solved.

Description

Technical Field

[0001] The present application relates to the field of lithium battery technology, and in particular to a liquid cooling plate and a battery pack. Background Art

[0002] Air cooling is the earliest cooling method used in batteries. Air flows through the surface of the battery cell to remove the heat from the battery module. The air cooling structure is relatively simple and the cost is low, but it has shortcomings in energy efficiency, protection and noise.

[0003] As battery modules become increasingly powerful, and liquid working fluids have higher thermal conductivity, density, and specific heat capacity than air, liquid cooling, particularly indirect liquid cooling, has become widely used. Indirect contact liquid cooling systems utilize a liquid cooling plate in contact with the battery module. Coolant flows through the plate's pipes, removing heat from the battery module. Liquid cooling offers excellent heat transfer, and the temperature difference between battery cells is much smaller than with air cooling.

[0004] However, in the existing liquid cooling method, the flow channel resistance of the liquid cooling plate is large and the temperature uniformity effect is poor. Utility Model Content

[0005] The purpose of the present application is to provide a liquid cooling plate and a battery pack, thereby solving the problems of large flow channel resistance and poor temperature uniformity of existing liquid cooling plates.

[0006] According to the first aspect of the present application, a liquid cooling plate is provided, which includes a main channel plate and a branch channel plate; the branch channel plate includes a plurality of branch channels arranged along a first direction, and each of the branch channels is provided with a first interface and a second interface on the same side of the branch channel plate; the main channel plate includes a first channel and a second channel; the first channel is provided with a plurality of first connection ports on the same side of the main channel plate, and the plurality of first connection ports are respectively connected to the plurality of first interfaces; the second channel is provided with a plurality of second connection ports on the same side of the main channel plate, and the plurality of second connection ports are respectively connected to the plurality of second interfaces; a first main interface is provided at one end of the first channel, and a second main interface is provided at one end of the second channel, and the first main interface and the second main interface are respectively provided at both ends in the first direction; the fluid can flow to the second main interface via the first main interface, the first channel, the branch channel, and the second channel; or, the fluid can flow to the first main interface via the second main interface, the second channel, the branch channel, and the first channel.

[0007] In any of the above technical solutions, further, the main channel plate includes a first layer and a second layer stacked along a second direction, the first channel is arranged in the first layer, the second channel is arranged in the second layer, and the second direction intersects with the first direction.

[0008] In any of the above technical solutions, further, the first connection port and the second connection port are alternately arranged along the first direction on the same side of the main channel plate; the branch channel plate is aligned with the first layer; in the second direction, the size of the second connection port is larger than the size of the first channel, so that at least part of the second connection port extends to the second channel to connect the second interface and the second channel.

[0009] In any of the above technical solutions, further, the first flow channel includes a flow blocking wall, and the flow blocking wall is arranged in the second connecting port and is arranged on the first layer, so that the second connecting port is not connected to the first flow channel.

[0010] In any of the above technical solutions, further, a guide surface is provided on the side of the baffle wall facing the diversion channel, and the guide surface is provided on the side of the baffle wall close to the second layer; in the direction from one end of the guide surface close to the first layer to the other end, the guide surface gradually tilts toward the second channel.

[0011] In any of the above technical solutions, further, the liquid cooling plate also includes a first seal; the manifold plate is aligned with the first layer to seal parts of the first connection port and the second connection port; the first seal is aligned with the second layer to seal another part of the second connection port.

[0012] In any of the above technical solutions, further, the liquid cooling plate also includes a first end cover, a second end cover, a first main joint and a second main joint; both ends of the first flow channel and both ends of the second flow channel are open; the first end cover is arranged at one end of the main channel plate to seal the port of the first flow channel and the port of the second flow channel; a first connecting cavity is provided inside the first end cover, and the first connecting cavity connects the first main joint and the first flow channel; the second end cover is provided at the other end of the main channel plate to seal the port of the first flow channel and the port of the second flow channel; a second connecting cavity is provided inside the second end cover, and the second connecting cavity connects the second main joint and the second flow channel.

[0013] In any of the above technical solutions, further, the liquid cooling plate also includes a second seal; each of the diverter channels includes a first diverter channel and a second diverter channel arranged along the first direction, and the first diverter channel and the second diverter channel both extend along a third direction; the second seal is arranged on the other side of the diverter channel plate, and the second seal is provided with a plurality of return grooves arranged along the first direction; each of the return grooves is connected to the first diverter channel and the second diverter channel of the same diverter channel; the third direction intersects with the plane determined by the first direction and the second direction.

[0014] In any of the above technical solutions, further, the manifold plate is formed as a whole by extrusion of a profile, and the main manifold plate is formed as a whole by extrusion of a profile.

[0015] According to a second aspect of the present application, a battery pack is provided, comprising the liquid cooling plate as described above.

[0016] In any of the above technical solutions, further, the battery pack further includes a plurality of single cells; each of the single cells extends along the first direction, and each of the single cells contacts at least two of the shunt channels.

[0017] The liquid cooling plate of the present application includes a main channel plate and a branch channel plate. The branch channel plate includes a plurality of branch channels arranged along the first direction, and each branch channel is provided with a first interface and a second interface on the same side of the branch channel plate; the main channel plate includes a first channel and a second channel. The first channel is provided with a plurality of first connection ports on the same side of the main channel plate, and the plurality of first connection ports are respectively connected to the plurality of first interfaces; the second channel is provided with a plurality of second connection ports on the same side of the main channel plate, and the plurality of second connection ports are respectively connected to the plurality of second interfaces; a first main interface is provided at one end of the first channel, and a second main interface is provided at one end of the second channel, and the first main interface and the second main interface are respectively provided at both ends in the first direction. The fluid can flow to the second main interface via the first main interface, the first channel, the branch channel, and the second channel; or the fluid can flow to the first main interface via the second main interface, the second channel, the branch channel, and the first channel.

[0018] According to the above technical features, the beneficial effects of this application are:

[0019] Taking the example of fluid entering from the first main interface and flowing out from the second main interface, the fluid in the present application can flow through the first main interface, the first flow channel, the first interface of the branch channel, multiple branch channels, the second interface of the branch channel, and the second flow channel to the second main interface.

[0020] First, the multiple shunt channels of this application are connected in parallel. When the liquid cooling plate is applied to a battery module, the same single cell can contact multiple shunt channels simultaneously, and each shunt channel has liquid inlet through the first interface and liquid outlet through the second interface. In other words, for each of the multiple parallel shunt channels passing through each single cell, low-temperature water first contacts the single cell, and then high-temperature water contacts the single cell. In this way, each single cell is alternately heated and cooled in the first direction, resulting in a better temperature uniformity for the single cells.

[0021] Secondly, for each pair of shunt channels, the paths of the multiple shunt channels connected in parallel in the first direction of this application are the same and relatively short. In addition, for each shunt channel, if the first interface of each shunt channel is close to the first main interface (liquid inlet), its second interface is far away from the second main interface (liquid outlet), that is, the fluid enters first and exits last, and the last-in-first-out principle is adopted. In other words, the total path of each shunt channel plus the flow channel within the main channel plate is the same. In this way, the flow resistance of each shunt channel is comparable, which is also conducive to temperature uniformity of the single battery cells.

[0022] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 A schematic diagram showing the overall structure of a liquid cooling plate according to an embodiment of the present application is shown;

[0025] Figure 2 A schematic diagram showing the overall structure of a manifold plate according to an embodiment of the present application is shown;

[0026] Figure 3 A schematic diagram showing the overall structure of a second sealing member according to an embodiment of the present application is shown;

[0027] Figure 4 A schematic diagram showing the overall structure of a main runner plate according to an embodiment of the present application is shown;

[0028] Figure 5 Show Figure 4 A magnified schematic diagram of part A;

[0029] Figure 6 A schematic diagram showing the installation structure of the first sealing member according to an embodiment of the present application is shown;

[0030] Figure 7 A schematic diagram showing the installation structure of the first end cover of an embodiment of the present application is shown;

[0031] Figure 8 A schematic diagram showing the installation structure of the second end cover of an embodiment of the present application is shown;

[0032] Figure 9 A schematic diagram showing the fluid flow of a liquid cooling plate according to an embodiment of the present application;

[0033] Figure 10 A schematic cross-sectional view showing the main flow channel plate and the first branch flow channel according to an embodiment of the present application;

[0034] Figure 11 A cross-sectional schematic diagram of the main flow channel plate and the second branch flow channel according to an embodiment of the present application is shown.

[0035] Icons: 100-main channel plate; 110-first flow channel; 111-first connecting port; 120-second flow channel; 121-second connecting port; 122-flow baffle wall; 1221-guide surface; 200-diverter plate; 210-diverter; 211-first diverter; 212-second diverter; 300-first main connector; 400-second main connector; 500-first seal; 600-second seal; 601-return groove; 700-first end cover; 701-first connecting cavity; 800-second end cover; 801-second connecting cavity; 900-single cell; X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0036] The following detailed description is provided to help the reader gain a comprehensive understanding of the methods, devices, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, devices, and / or systems described herein will be apparent upon understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein. Rather, except for operations that must occur in a particular order, changes may be made that will be apparent upon understanding the disclosure of this application. Furthermore, descriptions of features known in the art may be omitted for clarity and brevity.

[0037] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many possible ways to implement the methods, devices, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0038] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being “on,” “connected to,” “coupled to,” “over,” or “overlaying” another element, it may be directly “on,” “connected to,” “coupled to,” “over,” or “overlaying” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on,” “directly connected to,” “directly coupled to,” “directly over,” or “directly covering” another element, there may be no other elements intervening therebetween.

[0039] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0040] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are used only to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Thus, a first member, component, region, layer, or portion in the examples described herein may also be referred to as a second member, component, region, layer, or portion without departing from the teachings of the examples.

[0041] For ease of description, spatial relational terms such as "above," "upper," "below," and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element would subsequently be "below" or "lower" relative to the other element. Thus, the term "above" includes both the orientations "above" and "below," depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0042] The terms used herein are intended only to describe various examples and are not intended to limit the present disclosure. Unless the context clearly indicates otherwise, the singular is intended to include the plural. The terms "comprise," "include," and "have" list the presence of stated features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0043] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the drawings may occur. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include changes in shapes that occur during manufacturing.

[0044] The features of the examples described herein can be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0045] In a first aspect, the present application provides a liquid cooling plate, thereby solving the problems of large flow channel resistance and poor temperature uniformity in existing liquid cooling plates.

[0046] Refer to the following Figures 1 to 11 The liquid cooling plate according to some embodiments of the present application is described. For ease of description, the following description will be based on an example where the first direction X, the second direction Y, and the third direction Z are perpendicular to each other. Perpendicular here refers to 90°±5°.

[0047] like Figure 1 and Figure 2 As shown, the liquid cooling plate of the present application includes a main channel plate 100 and a branch channel plate 200. The branch channel plate 200 includes a plurality of branch channels 210 arranged along a first direction X, and each branch channel 210 is provided with a first interface and a second interface on the same side of the branch channel plate 200; Figure 4 and Figure 5As shown, the main channel plate 100 includes a first channel 110 and a second channel 120. The first channel 110 is provided with a plurality of first connection ports 111 on the same side of the main channel plate 100, and the plurality of first connection ports 111 are respectively connected to the plurality of first interfaces; the second channel 120 is provided with a plurality of second connection ports 121 on the same side of the main channel plate 100, and the plurality of second connection ports 121 are respectively connected to the plurality of second interfaces; a first main interface is provided at one end of the first channel 110, and a second main interface is provided at one end of the second channel 120, and the first main interface and the second main interface are respectively provided at both ends in the first direction X. The fluid can flow to the second main interface via the first main interface, the first channel 110, the branch channel 210, and the second channel 120; or the fluid can flow to the first main interface via the second main interface, the second channel 120, the branch channel 210, and the first channel 110.

[0048] The following description will be based on the example of fluid entering from the first main interface and flowing out from the second main interface. That is, the description will be based on the example of fluid flowing through the first main interface, the first flow channel 110, the first interface of the branch channel 210, the multiple branch channels 210, the second interface of the branch channel 210, the second flow channel 120 to the second main interface (refer to Figure 10 and Figure 11 ).

[0049] like Figure 9 As shown, first, the multiple shunt channels 210 of the present application are connected in parallel. When the liquid cooling plate is applied to a battery module, the same single cell 900 can contact multiple shunt channels 210 simultaneously, and each shunt channel 210 has liquid inlet through the first interface and liquid outlet through the second interface. In other words, through the multiple parallel shunt channels 210 of each single cell 900, for each shunt channel 210, low-temperature water first contacts the single cell 900, and then high-temperature water contacts the single cell 900. In this way, each single cell 900 is alternately heated and cooled in the first direction X, thereby achieving a better temperature uniformity for the single cell 900.

[0050] Secondly, for each pair of shunt channels 210, the paths of the multiple shunt channels 210 connected in parallel in the first direction X of the present application are the same and relatively short. In addition, for each shunt channel 210, if the first interface of each shunt channel 210 is close to the first main interface (liquid inlet), its second interface is far away from the second main interface (liquid outlet), that is, the fluid enters first and exits last, and the last-in-first-out principle is adopted. In other words, the total path of each shunt channel 210 plus the flow channel within the main channel plate 100 is the same. In this way, the flow resistance of each shunt channel 210 is comparable, which is also conducive to the uniform temperature of the single battery 900.

[0051] In the embodiments of the present application, Figure 4 and Figure 5As shown, the main flow channel plate 100 of the present application includes a first layer and a second layer stacked along the second direction Y. The first flow channel 110 is disposed on the first layer, and the second flow channel 120 is disposed on the second layer. This stacking of the first flow channel 110 and the second flow channel 120 not only saves space but also facilitates communication between the first flow channel 110 and the second flow channel 120 and the branch flow channel plate 200.

[0052] Furthermore, in the embodiments of the present application, Figure 1 and Figure 4 As shown, the first connection port 111 and the second connection port 121 are alternately arranged on the same side of the main channel plate 100 along the first direction X; the branch channel plate 200 is aligned with the first layer. Figure 5 As shown, in the second direction Y, the size of the second connecting port 121 is larger than the size of the first flow channel 110 , so that at least a portion of the second connecting port 121 extends to the second flow channel 120 to connect the second interface and the second flow channel 120 .

[0053] So, like Figure 4 and Figure 9 As shown (refer to Figure 10 and Figure 11 ), the manifold plate 200 is aligned with the first layer of the main manifold plate 100, and the fluid in the first channel 110 (liquid inlet channel) can be directly distributed to the manifold plate 200 from the first interface of the manifold 210; the second channel 120 (liquid outlet channel) is in the upper layer, and the fluid in multiple manifold plates 200 can flow out from the second interface of the manifold plate 200, and enter the second channel 120 (liquid outlet channel) through the diversion of the second connecting port 121, and finally flow out of the liquid cooling plate from the second total interface.

[0054] In the embodiments of the present application, Figure 5 As shown, the first flow channel 110 includes a flow blocking wall 122 . The flow blocking wall 122 is disposed in the second connecting port 121 and is disposed on the first layer so that the second connecting port 121 is not connected to the first flow channel 110 .

[0055] The baffle 122 can, on the one hand, play a role in diversion, that is, diverting the return water of the diversion channel plate 200 to the second flow channel 120 of the main flow channel plate 100; on the other hand, it can block the second connection port 121 and the first flow channel 110, so that the second connection port 121 and the first flow channel 110 are not connected, thereby preventing cross flow. Figure 5 The first flow channel 110 and the second flow channel 120 of the present application are staggered in the second direction Y. The wall thickness left by the staggered setting (the wall thickness of the main channel plate 100) can facilitate the setting of the first connecting port 111 and the flow baffle wall 122, which can effectively prevent the first flow channel 110 and the second flow channel 120 from flowing into each other.

[0056] In addition, in order to make the baffle wall 122 play a better role in guiding the flow, the present application continues to refer to Figure 5 A guide surface 1221 may be provided on the side of the baffle wall 122 facing the diverter channel 210, and the guide surface 1221 is provided on the side of the baffle wall 122 close to the second layer. The guide surface 1221 gradually slopes toward the second flow channel 120, with one end of the guide surface 1221 close to the first layer pointing to the other end.

[0057] As an example, the guide surface 1221 may be an inclined surface inclined toward the second flow channel 120 , or may be an arc surface inclined toward the second flow channel 120 . Figure 5 FIG. 1 shows that the guide surface 1221 is in the form of an arc surface.

[0058] It is also worth mentioning that the liquid cooling plate in the existing technology not only has a long path, large flow resistance, and poor temperature uniformity, but also has a complex processing process. The mold opening cost of stamping and welding plates is high, and most liquid cooling plates have low compressive strength. The battery cells require additional structural parts to support them.

[0059] In this regard, in the embodiment of the present application, the branch channel plate 200 and the main channel plate 100 of the present application are both formed as a whole by extrusion of profiles. On the basis of small flow resistance and good temperature uniformity effect, product quality and cost are also easy to control.

[0060] However, in the embodiment of the present application, in order to facilitate the extrusion of the manifold plate 200 and the main manifold plate 100 from the profile, an additional seal is required to seal the manifold plate 200 and the main manifold plate 100. The following description will take the manifold plate 200 as an example.

[0061] like Figure 2 and Figure 9 As shown, each branch channel 210 includes a first branch channel 211 and a second branch channel 212 arranged along the first direction X, and the first branch channel 211 and the second branch channel 212 both extend along the third direction Z.

[0062] like Figure 3 and Figure 9 As shown, the liquid cooling plate also includes a second seal 600, which is disposed on the other side of the manifold plate 200. The second seal 600 is provided with a plurality of return grooves 601 arranged along the first direction X; each return groove 601 communicates with the first branch channel 211 and the second branch channel 212 of the same branch channel 210. For each branch channel 210, the fluid entering through the first interface rotates 180 degrees through the return groove 601 and flows out through the second interface. As an example, the second seal 600 can be a solid sealing strip welded to the manifold plate 200.

[0063] In the embodiment of the present application, in order to facilitate the extrusion of the manifold plate 200 and the main manifold plate 100 into an integral shape from a profile, an additional seal is required to seal the manifold plate 200 and the main manifold plate 100. The main manifold plate 100 will be used as an example for the following description.

[0064] like Figure 1 and Figure 6 As shown, the liquid cooling plate further includes a first seal 500. The manifold plate 200 is aligned with the first layer to seal portions of the first and second connection ports 111 and 121. The first seal 500 is aligned with the second layer to seal the other portion of the second connection port 121. For example, the first seal 500 can be a solid sealing strip welded to the main manifold plate 100.

[0065] Further, if Figure 1 、 Figure 7 and Figure 8 As shown, the liquid cooling plate further includes a first end cap 700, a second end cap 800, a first main joint 300, and a second main joint 400. Both ends of the first flow channel 110 and the second flow channel 120 are open. The first end cap 700 is disposed at one end of the main channel plate 100 to seal the ports of the first flow channel 110 and the second flow channel 120. A first connecting cavity 701 is disposed within the first end cap 700, connecting the first main joint 300 and the first flow channel 110. Similarly, a second end cap 800 is disposed at the other end of the main channel plate 100 to seal the ports of the first flow channel 110 and the second flow channel 120. A second connecting cavity 801 is disposed within the second end cap 800, connecting the second main joint 400 and the second flow channel 120.

[0066] In summary, if Figure 9 As shown, the multiple shunt channels 210 of the present application are connected in parallel. When the liquid cooling plate is applied to a battery module, the same single cell 900 can contact multiple shunt channels 210 simultaneously (the single cell 900 can be placed upright or sideways), and each shunt channel 210 has liquid inlet through the first interface and liquid outlet through the second interface. In other words, through the multiple parallel shunt channels 210 of each single cell 900, for each shunt channel 210, low-temperature water first contacts the single cell 900, and then high-temperature water contacts the single cell 900. In this way, each single cell 900 is alternately heated and cooled in the first direction X, thereby achieving a better temperature uniformity of the single cell 900.

[0067] Secondly, for each pair of shunt channels 210, the paths of the multiple shunt channels 210 connected in parallel in the first direction X of the present application are the same and relatively short. In addition, for each shunt channel 210, if the first interface of each shunt channel 210 is close to the first main interface (liquid inlet), its second interface is far away from the second main interface (liquid outlet), that is, the fluid enters first and exits last, and the last-in-first-out principle is adopted. In other words, the total path of each shunt channel 210 plus the flow channel within the main channel plate 100 is the same. In this way, the flow resistance of each shunt channel 210 is comparable, which is also conducive to the uniform temperature of the single battery 900.

[0068] In addition, the manifold plate 200 and the main manifold plate 100 of the present application are both formed in one piece by extrusion of profiles. On the basis of small flow resistance and good temperature uniformity, product quality and cost are also easy to control.

[0069] In addition, the number of shunt channels 210 under each single battery 900 is adjustable (2 to 10 pairs);

[0070] In addition, the liquid cooling plate is also suitable for heating the single battery 900 (liquid heat);

[0071] In addition, the fluid medium can be pure water + ethylene glycol.

[0072] According to a second aspect of the present application, a battery pack is provided, comprising the liquid cooling plate described above, wherein the battery pack further comprises a plurality of single cells 900 , each of which extends along a first direction X and contacts at least two shunt channels 210 .

[0073] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application rather than to limit them. The scope of protection of the present application is not limited thereto. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that any technician familiar with this technical field can still modify the technical solutions recorded in the aforementioned embodiments within the technical scope disclosed in the present application, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be covered by the scope of protection of the present application.

Claims

1. A liquid cooling plate, characterized in that: The liquid cooling plate includes a main channel plate and a branch channel plate; The manifold plate includes a plurality of manifolds arranged along a first direction, and each manifold is provided with a first interface and a second interface on the same side of the manifold plate; The main flow channel plate includes a first flow channel and a second flow channel; The first flow channel is provided with a plurality of first connection ports on the same side of the main flow channel plate, and the plurality of first connection ports are respectively connected to the plurality of first interfaces; The second flow channel is provided with a plurality of second connection ports on the same side of the main flow channel plate, and the plurality of second connection ports are respectively connected to the plurality of second interfaces; A first main interface is provided at one end of the first flow channel, and a second main interface is provided at one end of the second flow channel, wherein the first main interface and the second main interface are respectively provided at two ends in the first direction; The fluid can flow to the second main interface through the first main interface, the first flow channel, the branch channel, and the second flow channel; Alternatively, the fluid can flow to the first main port via the second main port, the second flow channel, the branch flow channel, and the first flow channel.

2. The liquid cooling plate according to claim 1, wherein: The main channel plate includes a first layer and a second layer stacked along a second direction, the first channel is arranged on the first layer, the second channel is arranged on the second layer, and the second direction intersects the first direction.

3. The liquid cooling plate according to claim 2, wherein: The first connecting port and the second connecting port are alternately arranged along the first direction on the same side of the main channel plate; The manifold plate is aligned with the first layer; In the second direction, the size of the second connecting port is larger than the size of the first flow channel, so that at least a portion of the second connecting port extends to the second flow channel to connect the second interface and the second flow channel.

4. The liquid cooling plate according to claim 3, wherein: The first flow channel includes a flow blocking wall, which is arranged in the second connecting port and on the first layer, so that the second connecting port is not communicated with the first flow channel.

5. The liquid cooling plate according to claim 4, characterized in that: A guide surface is provided on a side of the baffle wall facing the diversion channel, and the guide surface is provided on a side of the baffle wall close to the second layer; In a direction from one end of the guide surface close to the first layer to the other end, the guide surface gradually inclines toward the second flow channel.

6. The liquid cooling plate according to claim 3, wherein: The liquid cooling plate further includes a first sealing member; The manifold plate is aligned with the first layer to seal the first connection port and part of the second connection port; the first sealing member is aligned with the second layer to seal the other part of the second connection port.

7. The liquid cooling plate according to claim 2, wherein: The liquid cooling plate further comprises a first end cover, a second end cover, a first main joint and a second main joint; Both ends of the first flow channel and both ends of the second flow channel are open; The first end cap is provided at one end of the main channel plate to seal the port of the first channel and the port of the second channel; a first communicating cavity is provided inside the first end cap, and the first communicating cavity communicates with the first main joint and the first channel; The second end cover is provided at the other end of the main channel plate to seal the ports of the first channel and the second channel; a second communicating cavity is provided inside the second end cover, and the second communicating cavity communicates with the second main joint and the second channel.

8. The liquid cooling plate according to claim 2, wherein: The liquid cooling plate further includes a second sealing member; Each of the branch channels includes a first branch channel and a second branch channel arranged along the first direction, and the first branch channel and the second branch channel both extend along the third direction; The second sealing member is provided on the other side of the manifold plate, and the second sealing member is provided with a plurality of return grooves arranged along the first direction; Each of the return grooves is connected to the first branch channel and the second branch channel of the same branch channel; The third direction intersects a plane defined by both the first direction and the second direction.

9. The liquid cooling plate according to any one of claims 1 to 8, characterized in that: The manifold plate is formed as a whole by extruding a profile, and the main manifold plate is formed as a whole by extruding a profile.

10. A battery pack, characterized in that: comprising a liquid cooling plate as claimed in any one of claims 1 to 9; The battery pack further comprises a plurality of single cells; Each of the unit cells extends along the first direction, and each of the unit cells contacts at least two of the shunt channels.

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