Liquid cooling plate and battery assembly

Abstract

The utility model relates to a liquid cooling plate and a battery assembly, the liquid cooling plate comprises a water inlet flow channel, the water inlet flow channel comprises a plurality of water inlet sub-flow channels arranged at intervals, and the water inlet sub-flow channels forward extend along a first direction; the water outlet flow channel comprises a plurality of water outlet sub-flow channels which are arranged at intervals, the water outlet sub-flow channels reversely extend in the first direction, and the number of the water outlet sub-flow channels is larger than that of the water inlet sub-flow channels; the water inlet flow channel and the water outlet flow channel are arranged on the plate body in a spaced mode in the second direction, and a water inlet of the water inlet flow channel and a water outlet of the water outlet flow channel are formed in one side of the plate body in the second direction; and the connecting flow channels are communicated with the water inlet flow channel and the water outlet flow channel, the connecting flow channels are laid between the water inlet flow channel and the water outlet flow channel, and each connecting flow channel is provided with a plurality of bends. According to the liquid cooling plate, the mode that the multiple branches are connected in series and in parallel is adopted, and flow distribution in all the branches can be effectively balanced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a liquid cooling plate and a battery assembly. Background Art

[0002] With the increasing requirements for the range of electric vehicles and the development of fast charging technology, the storage capacity of battery components continues to grow. During the charging and discharging process of battery components, the heat generation and heat accumulation of battery components need to be solved urgently. Usually, battery components exchange heat with the battery cells through liquid cooling plates to dissipate the heat generated during the charging and discharging process of battery components. Therefore, battery components have higher and higher requirements for the heat exchange capacity and temperature uniformity of liquid cooling plates.

[0003] In the prior art, most of the liquid cooling plates of traditional battery assemblies are single flow channels in series or in parallel. A single flow channel in series will design the flow channel length to be longer, resulting in excessive flow resistance and increased cooling and heating energy consumption. Although a single flow channel in parallel has a smaller flow resistance, it is difficult to maintain uniform flow distribution and there are heat exchange dead spots, especially for high-capacity and large-size battery assemblies, which will increase the temperature difference between the battery cells and affect the charging and discharging of the battery assembly. Utility Model Content

[0004] Based on this, it is necessary to provide a liquid cooling plate and a battery assembly to address the problems existing in the existing liquid cooling plate with a single flow channel in series or in parallel.

[0005] A liquid cooling plate, comprising:

[0006] A water inlet flow channel, the water inlet flow channel comprising a plurality of water inlet diverter channels arranged at intervals, the water inlet diverter channels extending forwardly along a first direction;

[0007] An outlet flow channel, the outlet flow channel comprising a plurality of outlet water diverter channels arranged at intervals, the outlet water diverter channels extending in the opposite direction along the first direction, and the number of the outlet water diverter channels is greater than the number of the inlet water diverter channels;

[0008] a plate body, the water inlet channel and the water outlet channel are arranged on the plate body at intervals along the second direction, and a water inlet of the water inlet channel and a water outlet of the water outlet channel are arranged on one side of the plate body along the second direction; and

[0009] A plurality of connecting flow channels, wherein the connecting flow channels connect the water inlet flow channel and the water outlet flow channel, the connecting flow channels are laid between the water inlet flow channel and the water outlet flow channel, and the connecting flow channels have a plurality of bends.

[0010] In one embodiment, the connecting flow channel includes a first flow channel, a second flow channel, and a third flow channel. The first flow channel is arranged near the water inlet of the incoming water flow channel. The third flow channel is arranged away from the water inlet of the incoming water flow channel. The second flow channel is arranged between the first flow channel and the third flow channel. The first flow channel connects the incoming water flow channel and the outgoing water flow channel. The second flow channel connects the incoming water flow channel and the third flow channel. The third flow channel connects the incoming water flow channel and the outgoing water flow channel.

[0011] In one embodiment, the first flow channel includes a first main branch extending positively along the second direction, a second main branch extending positively along the second direction, a first branch path extending in an S-shaped bend, and a second branch path extending in an S-shaped bend. The water inlet end of the first main branch is connected to the incoming water flow channel. The water outlet end of the first main branch is connected to the water inlet end of the second branch path. The water inlet end of the first branch path is connected to the first main branch. The water outlet end of the first branch path is connected to the water inlet end of the second main branch. The water outlet end of the second main branch is connected to the outgoing water flow channel. The water outlet end of the second branch path is connected to the second main branch.

[0012] In one embodiment, the second flow channel includes a third main branch extending positively along the second direction and a third branch path extending in an S-shaped bend. The water inlet end of the third main branch is connected to the incoming water flow channel. The water outlet end of the third main branch is connected to the water inlet end of the third branch path. The water outlet end of the third branch path is connected to the third flow channel.

[0013] In one embodiment, the third flow channel includes a fourth main branch extending positively along the second direction, a fourth branch path extending in a C-shaped bend, and a fifth main branch extending positively along the second direction. The water inlet end of the fourth main branch is connected to the incoming water flow channel. The water outlet end of the fourth main branch is connected to the water inlet end of the fourth branch path. The water outlet end of the fourth branch path is connected to the water inlet end of the fifth main branch. The water outlet end of the fifth main branch is connected to the outgoing water flow channel. The third branch path is connected to the fifth main branch.

[0014] In one embodiment, the fourth branch path includes two first section paths extending reversely along the first direction, one second section path extending positively along the second direction, and one third section path extending positively along the first direction. The water inlet ends of the two first section paths are both connected to the water outlet of the fourth main branch. The water outlet end of one first section path is connected to the water inlet end of the second section path. The water outlet end of the other first section path is connected to the second section path. The water outlet end of the second section path is connected to the water inlet end of the third section path. The water outlet end of the third section path is connected to the water inlet end of the fifth main branch.

[0015] In one embodiment, the first flow channel further includes a plurality of fifth branch roads connecting the first main branch road and the second main branch road, the fifth branch roads extend along an S-shaped bend, and the fifth branch roads are arranged between the first branch road and the second branch road.

[0016] In one embodiment, the number of the fifth branch roads is two, and the fifth branch road includes a plurality of fourth sections, a fifth section, a sixth section, a seventh section and a plurality of eighth sections connected in sequence, the fourth section is connected to the first main branch, the eighth section is connected to the second main branch, the fourth section extends forward in the first direction, the fifth section extends forward in the second direction, the sixth section extends reversely in the first direction, the seventh section extends forward in the second direction, and the eighth section extends forward in the first direction.

[0017] In one embodiment, the second flow channel further includes a plurality of sixth branch roads connecting the third main branch road and the fifth main branch road, and the shape of the sixth branch road is the same as that of the fifth branch road.

[0018] In one embodiment, the water inlet flow channel further includes a plurality of water inlet connecting flow channels arranged at intervals, the water inlet connecting flow channels extend positively along the second direction, and the water inlet connecting flow channels are connected to the water inlet diversion channel; the water outlet flow channel further includes a plurality of water outlet connecting flow channels arranged at intervals, the water outlet connecting flow channels extend positively along the second direction, and the water outlet connecting flow channels are connected to the water outlet diversion channel.

[0019] The above-mentioned liquid cooling plate adopts a combination of multiple branches in series and parallel, which can effectively balance the flow distribution in each branch. At the same time, combined with the alternating flow of heat exchange medium in each flow channel, the temperature uniformity performance of the liquid cooling plate is optimized, greatly improving the heat exchange efficiency. The liquid cooling plate can also flexibly adjust the total pressure drop of the liquid cooling plate, control it within a reasonable range, and reduce energy loss.

[0020] A battery assembly, comprising:

[0021] A liquid cooling plate as described in any one of the above; and

[0022] A battery body is arranged in a close contact with the liquid cooling plate.

[0023] The above-mentioned battery assembly can actively balance the flow distribution of the heat exchange medium and has good temperature uniformity. It solves the heating or cooling dead corners that exist when the battery assembly is working or charging and discharging in high or low temperature environments, provides sufficient heat exchange guarantee for each battery cell, and greatly improves the temperature consistency of the battery cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of a liquid cooling plate provided in one embodiment of the present application;

[0025] Figure 2 It shows that Figure 1 An enlarged schematic diagram of a part A of the liquid cooling plate shown;

[0026] Figure 3 It shows that Figure 1 A partial enlarged schematic diagram of a liquid cooling plate shown;

[0027] Figure 4 A schematic diagram of the structure of multiple strings of a battery assembly provided in one embodiment of the present application;

[0028] Figure 5 A schematic diagram of the structure of a two-parallel-multiple-string battery assembly provided for one embodiment of the present application.

[0029] Figure numerals: 10, water inlet channel; 11, water inlet diverter channel; 12, water inlet; 13, water inlet connecting channel; 20, water outlet channel; 21, water outlet diverter channel; 22, water outlet; 23, water outlet connecting channel; 30, connecting channel; 31, first channel; 311, first main branch; 312, second main branch; 313, first branch; 314, second branch; 315, fifth branch; 3151, fourth section; 3152, The fifth section of the road; 3153, the sixth section of the road; 3154, the seventh section of the road; 3155, the eighth section of the road; 32, the second flow channel; 321, the third main branch; 322, the third branch road; 323, the sixth branch road; 33, the third flow channel; 331, the fourth main branch; 332, the fourth branch road; 3321, the first section of the road; 3322, the second section of the road; 3323, the third section of the road; 333, the fifth main branch; 40, the plate; 50, the battery body. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0036] Specifically, see Figures 1 to 3 The present application provides a liquid cooling plate, which may include a water inlet channel 10, a water outlet channel 20, a plate body 40, and a plurality of connecting channels 30. The water inlet channel 10 includes a plurality of water inlet diversion channels 11 arranged at intervals, the water inlet diversion channels 11 are interconnected, and the water inlet diversion channels 11 extend forward along a first direction. The water outlet channel 20 includes a plurality of water outlet diversion channels 21 arranged at intervals, the water outlet diversion channels 21 are interconnected, and the water outlet diversion channels 21 extend in the opposite direction along a first direction, and the number of the water outlet diversion channels 21 is greater than the number of the water inlet diversion channels 11. The water inlet channel 10 and the water outlet channel 20 are arranged at intervals on the plate body 40 along a second direction, and the water inlet 12 of the water inlet channel 10 and the water outlet 22 of the water outlet channel 20 are arranged on one side of the plate body 40 along the second direction. The connecting channel 30 connects the water inlet channel 10 and the water outlet channel 20 . The connecting channel 30 is laid between the water inlet channel 10 and the water outlet channel 20 . The connecting channel 30 has a plurality of bends.

[0037] It can be understood that in the present application, the first direction can be a horizontal direction, and the second direction can be a vertical direction. The heat exchange medium enters the water inlet channel 10 from the water inlet 12, then flows into the water outlet channel 20 through each connecting channel 30, and finally leaves the water outlet channel 20 from the water outlet 22. The liquid cooling plate is provided with a plurality of water inlet diverter channels 11 and water outlet diverter channels 21 on the plate body 40, which can increase the water inlet and water outlet, effectively reduce the total pressure drop of the liquid cooling plate, and control it within a reasonable range, thereby improving the heat exchange capacity of the liquid cooling plate. Setting the number of water outlet diverter channels 21 to be greater than the number of water inlet diverter channels 11 can aggregate and increase the flow in the water outlet channel 20, and compensate for the slightly weakened heat exchange capacity due to the water temperature of the water outlet channel 20 being slightly lower than that of the water temperature of the water inlet channel 10.

[0038] For example, Figure 1 As shown, in one embodiment of the present application, the number of the water inlet diverter channels 11 is three, and the number of the water outlet diverter channels 21 is four.

[0039] Alternatively, if Figure 1 , Figure 2 and Figure 3As shown, in one embodiment of the present application, the connecting channel 30 includes a first channel 31, a second channel 32 and a third channel 33. The first channel 31 is arranged close to the water inlet 12 of the water inlet channel 10, and the third channel 33 is arranged away from the water inlet 12 of the water inlet channel 10. The second channel 32 is arranged between the first channel 31 and the third channel 33. The first channel 31 connects the water inlet channel 10 and the water outlet channel 20, the second channel 32 connects the water inlet channel 10 and the third channel 33, and the third channel 33 connects the water inlet channel 10 and the water outlet channel 20.

[0040] Compared with the second flow channel 32, the first flow channel 31 is closer to the water inlet 12 of the water outlet flow channel 20. The flow rate of the heat exchange medium in the first flow channel 31 is greater than the flow rate of the heat exchange medium in the second flow channel 32, so that the heat exchange capacity near the liquid cooling plate near the water inlet 12 is stronger, resulting in uneven temperature at various locations of the battery body 50.

[0041] Therefore, in the present application, the heat exchange medium flows into the first flow channel 31, the second flow channel 32 and the third flow channel 33 respectively through the water inlet flow channel 10, the heat exchange medium flowing into the first flow channel 31 flows directly into the water outlet flow channel 20, and the heat exchange medium flowing into the second flow channel 32 flows into the third flow channel 33 through the third flow channel 33, and then flows into the water outlet flow channel 20 through the third flow channel 33. In this way, the heat exchange medium of the second flow channel 32 is compensated by the third flow channel 33, so that the heat exchange capacity of the first flow channel 31 and the second flow channel 32 of the hot and cold plate is more balanced.

[0042] Preferably, in order to further balance the flow of the heat exchange medium in the first flow channel 31 and the second flow channel 32, as Figure 1 and Figure 2 As shown, in one embodiment of the present application, the first flow channel 31 includes a first main branch 311 extending in a positive direction along the second direction, a second main branch 312 extending in a positive direction along the second direction, a first branch 313 extending along an S-shaped bend, and a second branch 314 extending along the S-shaped bend, the water inlet end of the first main branch 311 is connected to the water inlet end of the second branch 314, the water inlet end of the first branch 313 is connected to the first main branch 311, the water outlet end of the first branch 313 is connected to the water inlet end of the second main branch 312, the water outlet end of the second main branch 312 is connected to the water outlet channel 20, and the water outlet end of the second branch 314 is connected to the second main branch 312.

[0043] In the first flow channel 31, after the heat exchange medium enters the first main branch 311 through the water inlet flow channel 10, a part of it is diverted through the first branch 313 and flows towards the second main branch 312, and the other part continues to flow along the first main branch 311 towards the second branch 314, and converges into the second main branch 312 via the second branch 314, and flows into the water outlet flow channel 20 through the second main branch 312. In this way, the frictional resistance along the path in the first branch 313 and the second branch 314 can be increased, so that the heat exchange medium flows more towards other branches between the first branch 313 and the second branch 314, thereby making the flow rate of the heat exchange medium in the first flow channel 31 more uniform.

[0044] More preferably, as Figure 1 and Figure 3 shown, in one embodiment, the second flow channel 32 includes a third main branch 321 extending in the positive second direction and a third branch 322 extending in an S-shaped bend. The water inlet end of the third main branch 321 communicates with the water inlet flow channel 10, the water outlet end of the third main branch 321 communicates with the water inlet end of the third branch 322, and the water outlet end of the third branch 322 communicates with the third flow channel 33. With this arrangement, the frictional resistance along the path in the third branch 322 can be increased, so that the heat exchange medium flows more into other branches of the second flow channel 32, thereby making the flow rate of the heat exchange medium in the second flow channel 32 more uniform.

[0045] More preferably, as Figure 1 and Figure 3 shown, in one embodiment, the third flow channel 33 includes a fourth main branch 331 extending in the positive second direction, a fourth branch 332 extending in a U-shaped bend, and a fifth main branch 333 extending in the positive second direction. The water inlet end of the fourth main branch 331 communicates with the water inlet flow channel 10, the water outlet end of the fourth main branch 331 communicates with the water inlet end of the fourth branch 332, the water outlet end of the fourth branch 332 communicates with the water inlet end of the fifth main branch 333, the water outlet end of the fifth main branch 333 communicates with the water outlet flow channel 20, and the third branch 322 communicates with the fifth main branch 333. With this arrangement, the fourth branch 332 can increase the frictional resistance along the path of the third flow channel 33, so that more heat exchange medium flows into the second flow channel 32 to increase the flow rate of the heat exchange medium in the second flow channel 32.

[0046] Exemplarily, as Figure 1 and Figure 3As shown, in one embodiment, the fourth branch road 332 includes two first sections 3321 extending in the opposite direction along the first direction, a second section 3322 extending in the forward direction along the second direction, and a third section 3323 extending in the forward direction along the first direction, the water inlet ends of the two first sections 3321 are connected to the water outlet 22 of the fourth main branch road 331, the water outlet end of one first section 3321 is connected to the water inlet end of the second section 3322, the water outlet end of the other first section 3321 is connected to the second section 3322, the water outlet end of the second section 3322 is connected to the water inlet end of the third section 3323, and the water outlet end of the third section 3323 is connected to the water inlet end of the fifth main branch road 333.

[0047] With such arrangement, the heat exchange medium entering the fourth branch road 332 is divided by the two first sections 3321 and then merged into the second section 3322, which can further increase the flow resistance along the fourth branch road 332, so that more heat exchange medium flows into the second flow channel 32 to increase the flow rate of the heat exchange medium in the second flow channel 32.

[0048] In particular, if Figure 1 As shown, in one embodiment, the water inlet flow channel 10 further includes a plurality of water inlet communication flow channels 13 arranged at intervals, the water inlet communication flow channels 13 positively extending along the second direction, and the water inlet communication flow channels 13 are connected to the water inlet branch channel 11; the water outlet flow channel 20 further includes a plurality of water outlet communication flow channels 23 arranged at intervals, the water outlet communication flow channels 23 positively extending along the second direction, and the water outlet communication flow channels 23 are connected to the water outlet branch channel 21. In this way, the water inlet communication flow channels 13 can balance the flow in each water inlet branch channel 11, and the water outlet communication flow channels 23 can balance the flow in each water outlet branch channel 21, thereby reducing the along-the-way resistance of the water inlet flow channel 10 and the water outlet flow channel 20.

[0049] Furthermore, if Figure 1 and Figure 2 As shown, in one embodiment, the first flow channel 31 further includes a plurality of fifth branch roads 315 connecting the first main branch road 311 and the second main branch road 312, and the fifth branch roads 315 extend along an S-shaped bend, and the fifth branch roads 315 are arranged between the first branch road 313 and the second branch road 314.

[0050] With such a configuration, the fifth branch 315 can fill the gap between the first branch 313 and the second branch 314, increase the heat exchange area of ​​the liquid cooling plate, and enable the heat exchange medium entering the first main branch 311 to flow to the second main branch 312 through the fifth branch 315, thereby performing sufficient heat exchange with the battery body 50.

[0051] Alternatively, if Figure 2 As shown, in one embodiment, the number of the fifth branch road 315 is two, and the fifth branch road 315 includes a plurality of fourth sections 3151, a fifth section 3152, a sixth section 3153, a seventh section 3154 and a plurality of eighth sections 3155 connected in sequence, the fourth section 3151 is connected to the first main branch 311, the eighth section 3155 is connected to the second main branch 312, the fourth section 3151 extends in a positive direction along the first direction, the fifth section 3152 extends in a positive direction along the second direction, the sixth section 3153 extends in a reverse direction along the first direction, the seventh section 3154 extends in a positive direction along the second direction, and the eighth section 3155 extends in a positive direction along the first direction.

[0052] It can be understood that since the position of the fifth branch road 315 is farther from the water inlet channel 10 than the first branch road 313, the flow rate of the heat exchange medium flowing into the fifth branch road 315 is increased by increasing the number of the fourth section road 3151 and the fifth section road 3152, so as to make the heat exchange capacity of the liquid cooling plate at the fifth branch road 315 and the first branch road 313 more balanced.

[0053] For example, Figure 2 and Figure 3 As shown, in one embodiment, in the fifth branch road 315 near the water inlet channel 10, the number of the fifth section road 3152 can be three, and the number of the eighth section road 3155 can be two, and in the fifth branch road 315 near the water outlet channel 20, the number of the fifth section road 3152 can be two, and the number of the eighth section road 3155 can be two.

[0054] In particular, if Figure 3 As shown, in one embodiment, the second flow channel 32 further includes a plurality of sixth branch paths 323 connecting the third main branch path 321 and the fifth main branch path 333, and the shape of the sixth branch path 323 is the same as the shape of the fifth branch path 315. In this way, the first flow channel 31 and the second flow channel 32 have a plurality of identical parts, which is more convenient for the flow channel design and production of the liquid cooling plate.

[0055] It is worth noting that the spacing between the various flow channels of the liquid cooling plate can be flexibly avoided according to the vacancies or spots of the mounting holes in the actual battery assembly, and the number and length of the flow channel branches can be adjusted to meet the requirements of different cold plate boundary sizes, greatly improving the compatibility of the liquid cooling plate.

[0056] In summary, the present application provides a liquid cooling plate, which adopts a combination of multiple branches connected in series and parallel, which can effectively balance the flow distribution in each branch, and at the same time, combined with the alternating flow of heat exchange medium in each flow channel, the temperature uniformity performance of the liquid cooling plate is optimized, greatly improving the heat exchange efficiency. The liquid cooling plate can also flexibly adjust the total pressure drop of the liquid cooling plate, control it within a reasonable range, and reduce energy loss.

[0057] Furthermore, if Figure 4 and Figure 5 As shown, the present application provides a battery assembly, which includes a liquid cooling plate as described in any of the above and a battery main body 50, and the battery main body 50 is arranged in a close fit on the liquid cooling plate. The battery main body 50 can be a double-row group of battery cells in parallel and multiple strings, and at least three heat exchange channels are designed under one battery cell; the battery main body 50 can also be a single-row group of battery cells in parallel and multiple strings, and one battery cell covers at least six heat exchange channels. The above-mentioned battery assembly can actively balance the flow distribution of the heat exchange medium, has good temperature uniformity, solves the heating or cooling dead corners that exist in the battery assembly when working or charging and discharging in high or low temperature environments, provides sufficient heat exchange guarantee for each battery cell, and greatly improves the temperature consistency of the battery cell components.

[0058] The technical features of the above embodiment can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiment are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The above embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A liquid cooling plate, characterized in that: Comprising: An inlet water flow channel, the inlet water flow channel including a plurality of inlet water diversion channels arranged at intervals, the inlet water diversion channels extending forward in a first direction; An outlet water flow channel, the outlet water flow channel including a plurality of outlet water diversion channels arranged at intervals, the outlet water diversion channels extending backward in the first direction, the number of the outlet water diversion channels being greater than the number of the inlet water diversion channels; A plate body, the inlet water flow channel and the outlet water flow channel being arranged at intervals in a second direction on the plate body, an inlet of the inlet water flow channel and an outlet of the outlet water flow channel being arranged on one side of the plate body in the second direction; And A plurality of connecting flow channels, the connecting flow channels connecting the inlet water flow channel and the outlet water flow channel, the connecting flow channels being laid between the inlet water flow channel and the outlet water flow channel, the connecting flow channels having multiple bends.

2. The liquid cooling plate according to claim 1, characterized in that: The connecting flow channels include a first flow channel, a second flow channel and a third flow channel, the first flow channel being arranged near an inlet of the inlet water flow channel, the third flow channel being arranged away from the inlet of the inlet water flow channel, the second flow channel being arranged between the first flow channel and the third flow channel, the first flow channel connecting the inlet water flow channel and the outlet water flow channel, the second flow channel connecting the inlet water flow channel and the third flow channel, the third flow channel connecting the inlet water flow channel and the outlet water flow channel.

3. The liquid cooling plate according to claim 2, characterized in that: The first flow channel includes a first main branch extending forward in the second direction, a second main branch extending forward in the second direction, a first branch extending in an S-shaped bend and a second branch extending in an S-shaped bend, an inlet end of the first main branch being connected to the inlet water flow channel, an outlet end of the first main branch being connected to an inlet end of the second branch, an inlet end of the first branch being connected to the first main branch, an outlet end of the first branch being connected to an inlet end of the second main branch, an outlet end of the second main branch being connected to the outlet water flow channel, an outlet end of the second branch being connected to the second main branch.

4. The liquid cooling plate according to claim 3, characterized in that: The second flow channel includes a third main branch extending forward in the second direction and a third branch extending in an S-shaped bend, an inlet end of the third main branch being connected to the inlet water flow channel, an outlet end of the third main branch being connected to an inlet end of the third branch, an outlet end of the third branch being connected to the third flow channel.

5. The liquid cooling plate according to claim 4, characterized in that: The third flow channel includes a fourth main branch extending forward in the second direction, a fourth branch extending in a C-shaped bend and a fifth main branch extending forward in the second direction, an inlet end of the fourth main branch being connected to the inlet water flow channel, an outlet end of the fourth main branch being connected to an inlet end of the fourth branch, an outlet end of the fourth branch being connected to an inlet end of the fifth main branch, an outlet end of the fifth main branch being connected to the outlet water flow channel, the third branch being connected to the fifth main branch.

6. The liquid cooling plate according to claim 5, characterized in that: The fourth branch road includes two first sections extending in the opposite direction of the first direction, a second section extending in the forward direction of the second direction, and a third section extending in the forward direction of the first direction. The water inlet ends of the two first sections are connected to the water outlet of the fourth main branch road. The water outlet end of one first section is connected to the water inlet end of the second section, the water outlet end of the other first section is connected to the second section, the water outlet end of the second section is connected to the water inlet end of the third section, and the water outlet end of the third section is connected to the water inlet end of the fifth main branch road.

7. The liquid cooling plate according to claim 5, characterized in that: The first flow channel further includes a plurality of fifth branch roads connecting the first main branch road and the second main branch road, the fifth branch roads extend along an S-shaped bend, and the fifth branch roads are arranged between the first branch road and the second branch road.

8. The liquid cooling plate according to claim 7, characterized in that: The number of the fifth branch roads is two, and the fifth branch road includes a plurality of fourth sections, a fifth section, a sixth section, a seventh section and a plurality of eighth sections connected in sequence, the fourth section road is connected to the first main branch road, the eighth section road is connected to the second main branch road, the fourth section road extends forward in the first direction, the fifth section road extends forward in the second direction, the sixth section road extends reversely in the first direction, the seventh section road extends forward in the second direction, and the eighth section road extends forward in the first direction.

9. The liquid cooling plate according to claim 7 or 8, characterized in that: The second flow channel further includes a plurality of sixth branch roads connecting the third main branch road and the fifth main branch road, and the shape of the sixth branch road is the same as that of the fifth branch road.

10. The liquid cooling plate according to any one of claims 1 to 8, characterized in that: The water inlet flow channel further includes a plurality of water inlet connecting flow channels arranged at intervals, the water inlet connecting flow channels extend positively along the second direction, and the water inlet connecting flow channels are connected to the water inlet branch channel; the water outlet flow channel further includes a plurality of water outlet connecting flow channels arranged at intervals, the water outlet connecting flow channels extend positively along the second direction, and the water outlet connecting flow channels are connected to the water outlet branch channel.

11. A battery assembly, characterized in that: include: The liquid cooling plate according to any one of claims 1 to 10; and A battery body is arranged on the liquid cooling plate in a close fit.

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