Liquid cooling plate and energy storage module

Abstract

The utility model discloses a liquid cooling plate and an energy storage module, wherein at least two liquid separation channels corresponding to energy storage cells are arranged between the liquid inlet port and the liquid outlet port of the liquid cooling plate, at least part of the liquid separation channels are provided with a liquid flow section toward the liquid separation section, and the gap between the liquid flow section and the liquid separation section of the liquid separation channel close to the liquid inlet port is larger than the gap between the liquid flow section and the liquid separation section of the liquid separation channel far from the liquid inlet port. The energy storage module adopts the above-mentioned liquid cooling plate. The present application can improve the temperature uniformity of each energy storage cell.

Description

Technical Field

[0001] The utility model relates to the field of energy storage, and in particular to a liquid cooling plate and an energy storage module. Background Art

[0002] The energy storage system is generally composed of multiple energy storage modules, which include multiple energy storage cells and a shell for accommodating the energy storage cells. The bottom of the shell is generally provided with a liquid cooling plate, and the energy storage cells are attached to the liquid cooling plate to dissipate heat. The existing liquid cooling plate has uneven temperature control on the energy storage cells, and the overall temperature uniformity is poor. Utility Model Content

[0003] The purpose of the present invention is to overcome the above-mentioned defects or problems existing in the background technology and to provide a liquid cooling plate and an energy storage module, which are beneficial to improving the temperature uniformity of each energy storage cell.

[0004] In order to achieve the above-mentioned purpose, the present invention and its preferred embodiments adopt the following technical solutions, but the embodiments are not limited to the following solutions:

[0005] Technical solution 1 and its related embodiments design a liquid cooling plate for cooling a battery module, wherein the battery module includes at least two energy storage cells arranged along a first direction, and the energy storage cells extend along a second direction perpendicular to the first direction, wherein the liquid cooling plate is parallel to the first direction and the second direction, and a liquid inlet port and a liquid outlet port are arranged along the first direction on one side of the liquid cooling plate along the second direction, and a flow channel is formed between the liquid inlet port and the liquid outlet port, and the flow channel includes a liquid inlet flow channel connected to the liquid inlet port, a liquid outlet flow channel connected to the liquid outlet port, and a liquid outlet flow channel connected to the liquid outlet port. A liquid outlet channel at a liquid port and at least two liquid separation channels corresponding to the energy storage battery cells, at least two of the liquid separation channels are arranged along a first direction, and the liquid inlet channel is provided with a liquid separation section extending along the first direction; each liquid separation channel intersects with the liquid separation section at a liquid separation inlet and intersects with the liquid outlet channel at a liquid separation outlet; at least two liquid separation channels are provided with liquid passing sections toward the liquid separation sections, and a gap between the liquid passing section and the liquid separation section of the liquid separation channel close to the liquid inlet port is greater than a gap between the liquid passing section and the liquid separation section of the liquid separation channel away from the liquid inlet port.

[0006] Based on technical solution one, technical solution two is also provided. In technical solution two, the liquid outlet channel includes a liquid outlet section extending along the second direction and a liquid collecting section extending along the first direction; the liquid outlet section is connected to the liquid outlet port and is located on one side of each liquid separation channel along the first direction, and the liquid separation section and the liquid collecting section are respectively located on both sides of the liquid cooling plate along the second direction; the liquid separation channel intersects with the liquid collecting section at the liquid separation outlet and includes a plurality of first liquid separation channels and a second liquid separation channel, and the second liquid separation channel is located between the liquid outlet section and the first liquid separation channel; the second liquid separation channel includes a first section and a second section arranged along the second direction, the first section is provided with at least two first liquid separation sub-channels arranged along the first direction and extending along the second, each first liquid separation sub-channel intersects with the liquid separation section at the liquid separation inlet and is connected to the second section, and the second section and the liquid collecting section intersect at the liquid separation outlet; the first liquid separation channel is provided with the liquid passing section.

[0007] Based on Technical Solution 2, Technical Solution 3 is also provided. In Technical Solution 3, each first liquid separation channel is at least partially S-shaped, and the second section of the second liquid separation channel is at least partially S-shaped; the second liquid separation channel corresponds to at least two energy storage cells; and at least two first liquid separation channels in the first liquid separation channels close to the second liquid separation channel correspond to the same energy storage cell.

[0008] Based on technical solution three, there is also provided a technical solution four. In technical solution four, at least two first diverter strips extending along the first direction are arranged at intervals along the first direction in the liquid collecting section.

[0009] Based on technical solution four, technical solution five is also provided. In technical solution five, a second diverter strip and a third diverter strip are arranged at intervals along the first direction in the liquid outlet section, the second diverter strip extends along the second direction, and the third diverter strip includes a plurality of third sub-diverter strips arranged at intervals along the second direction.

[0010] Based on technical solutions two to five, there is also a technical solution six. In technical solution six, the liquid cooling plate includes an upper cold plate and a lower cold plate, the lower cold plate is stamped to form a number of water grooves opening upward and a number of stamped grooves opening downward, the upper cold plate is sealed and fixedly connected to the lower cold plate so that the water grooves cooperate with the upper cold plate to form the flow channel; the stamped grooves include positioning grooves extending along the second direction; the liquid cooling plate has at least one first connecting hole on the bottom wall of each positioning groove spaced apart along the second direction, and at least two second connecting holes are also spaced apart along the second direction on both sides along the first direction.

[0011] Based on technical solution six, technical solution seven is also provided. In technical solution seven, the positioning groove is formed in the gap of the first liquid separation channel and in the gap between the second liquid separation channel and the liquid outlet section.

[0012] The technology is based on solution seven and also has a technical solution eight. In the technical solution eight, at least one positioning groove is formed in the gap of the first liquid separation channel near the liquid inlet port, and at least one positioning groove is formed in the gap of the first liquid separation channel near the second liquid separation channel; each positioning groove corresponds to the edge of the energy storage cell.

[0013] Based on technical solution six, there is also provided technical solution nine. In technical solution nine, the second connection holes on both sides of the liquid cooling plate are symmetrically arranged, and each second connection hole is aligned with at least part of the first connection holes along the first direction.

[0014] Technical solution ten and its related embodiments relate to an energy storage module, wherein the liquid cooling plate described in any one of technical solutions one to nine is adopted.

[0015] From the above description of the utility model and its preferred embodiments, it can be seen that, compared with the prior art, the technical solution of the utility model and its preferred embodiments have the following beneficial effects due to the adoption of the following technical means:

[0016] In the technical solution 1, the liquid inlet port and the liquid outlet port of the liquid cooling plate are arranged on the same side, which is conducive to the arrangement of the liquid inlet joint and the liquid outlet joint on the same side, and is more conducive to subsequent installation; since the liquid separation channel is arranged corresponding to the energy storage battery cell, it can adapt to the solution of multiple energy storage batteries. When the area of ​​the liquid cooling plate remains unchanged, the number of liquid separation channels can be adjusted by changing the channel diameter and the channel spacing, which is more adaptable. The gap between the liquid passing section and the liquid separation section of the liquid separation channel close to the liquid inlet port is larger than the gap between the liquid passing section and the liquid separation section of the liquid separation channel far from the liquid inlet port. On the one hand, it is conducive to making the path length of the branch channel where each liquid separation channel is located between the liquid inlet port and the liquid outlet port consistent, thereby improving the temperature uniformity; on the other hand, since the temperature of the coolant at the liquid inlet port is lower, such a setting is conducive to maintaining the temperature balance of each liquid separation channel, thereby making the temperature of each energy storage battery cell more balanced, which is conducive to improving the temperature uniformity of each energy storage battery cell.

[0017] In technical solution two, it can be seen from the structural setting of the liquid separation channel that the liquid separation inlet of the second liquid separation channel is farthest from the liquid inlet port, so the temperature of the coolant in the second liquid separation channel is higher than that of other first liquid separation channels, and the second liquid separation channel includes a first section and a second section arranged along the second direction, and the first section is provided with at least two first liquid separation sub-channels arranged along the first direction and extending along the second direction. The flow rate of the first liquid separation sub-channel is fast, so that the second liquid separation channel forms a first section with a faster flow rate, so the temperature of the first section is low, and the coolant of multiple first liquid separation sub-channels converges into the second section, so the temperature of the second section is also relatively low. Therefore, the setting of the second liquid separation channel makes it far away from the liquid inlet port but the temperature is still close to that of other first liquid separation channels, so that the temperature difference of the corresponding energy storage cells is more balanced, thereby improving the temperature uniformity of each energy storage cell. The second sections of the first liquid-dividing flow channels and the second liquid-dividing flow channels converge at the liquid-collecting section, and the liquid-collecting section then flows into the liquid-discharging section, so the liquid flow rate is fast and the heat exchange is fast; the first liquid-dividing flow channel is provided with a liquid-passing section, which is beneficial for processing.

[0018] In technical solution three, each first liquid separation channel is at least partially S-shaped, and the second section of the second liquid separation channel is at least partially S-shaped, so that the flow resistance of the second liquid separation channel is smaller than that of the first liquid separation channel as a whole, and the second liquid separation channel corresponds to at least two energy storage cells. Therefore, the flow rate of the second liquid separation channel is fast, which is more conducive to taking away the heat of the energy storage cell away from the liquid inlet port, thereby further improving the temperature uniformity of the energy storage cell; at least two first liquid separation channels in the first liquid separation channel close to the second liquid separation channel correspond to the same energy storage cell. Therefore, the number of first liquid separation channels corresponding to the energy storage cell located in the middle is larger, and the flow rate is faster, which is more conducive to reducing the temperature difference with the energy storage cell close to the liquid inlet port; in addition, the S-shaped design of the first liquid separation channel and the S-shaped design of the second section of the second liquid separation channel allow the coolant to flow from one side of the liquid cooling plate to the other side and then flow to that side, thereby reducing the temperature difference on both sides of the liquid cooling plate along the second direction, which is conducive to reducing the temperature difference on both sides of the energy storage cell along the second direction.

[0019] In technical solution four, the setting of the first diverter strip increases the flow rate of the liquid collecting section, thereby increasing the heat exchange efficiency, avoiding excessive temperature at the end of the energy storage cell away from the liquid inlet port, and thus improving temperature uniformity.

[0020] In Technical Solution 5, the setting of the second diverter strip and the third diverter strip increases the flow rate, thereby increasing the heat exchange efficiency. The setting of the second diverter strip and the third diverter strip in the liquid outlet section is conducive to the rapid discharge of hot coolant, so that the heat of the energy storage cell farthest from the liquid inlet port can be taken away in time, thereby improving the temperature uniformity.

[0021] In technical solution six, the setting of the positioning groove enables better positioning of the liquid cooling plate when it is installed on the base, especially when the length of the liquid cooling plate along the second direction is long. The above setting makes it possible to pre-position the liquid cooling plate by setting a structure corresponding to the positioning groove on the base, and then lock the base with the first connecting hole and the second connecting hole to achieve the positioning of the liquid cooling plate, thereby ensuring the flatness of the liquid cooling plate.

[0022] In Technical Solution 7, the positioning grooves are formed in the gap of the first liquid separation channel and in the gap between the second liquid separation channel and the liquid outlet section, which is conducive to processing, so that the positioning grooves can be formed in one piece through the processing of the liquid separation channel, and the process is simpler; in addition, the positioning grooves are evenly distributed, and the gap in the first liquid separation channel and the gap between the second liquid separation channel and the liquid outlet section are widened, thereby avoiding heat accumulation.

[0023] In technical solution eight, since the temperature of the first liquid separation channel near the liquid inlet port is relatively low, at least one positioning groove is formed in the gap of the first liquid separation channel near the liquid inlet port, which can avoid the temperature of the energy storage cell near the liquid inlet port being too low; at least one positioning groove is formed in the gap of the first liquid separation channel near the second liquid separation channel, which can avoid the heat concentration in the middle of the first liquid separation channel, thereby reducing the temperature difference of the energy storage cell in the middle; each positioning groove corresponds to the edge of the energy storage cell, thereby minimizing the impact on the heat dissipation of the energy storage cell.

[0024] In technical solution nine, the second connecting holes on both sides of the liquid cooling plate are symmetrically arranged, so that the structure connecting the base and the second connecting holes can be of the same configuration, that is, basically the same process can be adopted, and the cost is lower; each second connecting hole is at least partially aligned with the first connecting hole along the first direction, on the one hand, it is convenient for opening holes, and on the other hand, it further makes the connection points between the liquid cooling plate and the base evenly distributed at multiple points and forms a local reinforcement structure, thereby further avoiding bending and deformation of the liquid cooling plate.

[0025] Technical solution ten has the technical advantages of any one of technical solutions one to nine. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 This is a schematic diagram of an energy storage module according to an embodiment of the utility model;

[0028] Figure 2 This is a schematic diagram of a liquid cooling plate according to an embodiment of the present utility model;

[0029] Figure 3 This is a schematic diagram of the lower surface side of the lower cold plate of the embodiment of the utility model;

[0030] Figure 4 It is a schematic diagram of the flow channel of the liquid cooling plate according to an embodiment of the utility model.

[0031] Figure 5 Schematic diagram of the correspondence between the flow channel of the liquid cooling plate and the energy storage cell according to an embodiment of the utility model.

[0032] Description of main reference numerals:

[0033] Liquid cooling plate 10; upper cold plate 11; lower cold plate 12; water tank 121; stamping groove 122; positioning groove 123; first connecting hole 1231; second connecting hole 1232; first diverter strip 124; second diverter strip 125; third diverter strip 126; liquid inlet port 01; liquid outlet port 02; liquid inlet channel 03; liquid separation section 031; liquid outlet channel 04; liquid outlet section 041; liquid collecting section 042; liquid separation channel 05; first liquid separation channel 051; second liquid separation channel 052; liquid passing section 053; first section 054; first liquid separation sub-channel 0541; second section 055; liquid separation inlet 06; liquid separation outlet 07; energy storage cell 20; energy storage module 100. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are preferred embodiments of the utility model and should not be regarded as excluding other embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0035] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" etc. is to distinguish different objects rather than to describe a specific order.

[0036] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise explicitly defined, directional words, such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", etc., indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the specific protection scope of the utility model.

[0037] In the claims, specification and the above drawings of the utility model, unless otherwise clearly defined, if the term "fixed connection" or "fixed connection" is used, it should be understood in a broad sense, that is, any connection method without a displacement relationship and relative rotation relationship between the two, that is to say, including non-detachable fixed connection, detachable fixed connection, integrated connection and fixed connection through other devices or elements.

[0038] In the claims, specification and drawings of the present utility model, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0039] See also Figure 1 , Figure 1 An energy storage module 100 is shown, which includes a battery module and a liquid cooling plate 10 for cooling the battery module. The battery module includes a plurality of battery packs, each of which includes N energy storage batteries 20 arranged along a first direction and extending along a second direction perpendicular to the first direction. The length direction of the energy storage battery 20 is the second direction, and the width direction of the energy storage battery 20 is the first direction. Figure 1-5 In the example, the first direction is the left-right direction, and the second direction is the front-back direction. N is a positive integer greater than 1, Figure 1 In the embodiment, the energy storage module 100 includes two battery cell packages arranged along the second direction, and each battery cell package includes four energy storage cells 20.

[0040] See also Figure 5 The liquid cooling plate 10 is a rectangular structure corresponding to the battery module, see Figure 2-4 The liquid cooling plate 10 is parallel to the first direction and the second direction. The lower end of the liquid cooling plate 10 is protruded with two protrusions extending along the second direction. The two protrusions are arranged along the first direction. The liquid inlet port 01 and the liquid outlet port 02 are respectively formed on the two protrusions, that is, the liquid cooling plate 10 is provided with a liquid inlet port 01 and a liquid outlet port 02 along the first direction on one side along the second direction. The two protrusions are arranged in this embodiment mainly to avoid interference with other devices after the liquid cooling plate 10 is installed.

[0041] See also Figure 4 A flow channel is formed between the liquid inlet port 01 and the liquid outlet port 02, and the flow channel includes a liquid inlet channel 03 connected to the liquid inlet port 01, a liquid outlet channel 04 connected to the liquid outlet port 02, and at least two liquid separation channels 05 arranged corresponding to the energy storage battery cell 20, at least two of the liquid separation channels 05 are arranged along the first direction, and the liquid inlet channel 03 is provided with a liquid separation section 031 extending along the first direction. In this embodiment, a total of 5 liquid separation channels 05 are formed; each liquid separation channel 05 intersects with the liquid separation section 031 at the liquid separation inlet 06 and intersects with the liquid outlet channel 04 at the liquid separation outlet 07.

[0042] The liquid inlet port 01 and the liquid outlet port 02 of the liquid cooling plate 10 are arranged on the same side, which is conducive to setting the liquid inlet joint and the liquid outlet joint on the same side, and is more conducive to subsequent installation; since the liquid separation channel 05 is arranged corresponding to the energy storage battery cell 20, it can adapt to the solution of multiple energy storage batteries 20. When the area of ​​the liquid cooling plate 10 remains unchanged, the channel diameter and the channel spacing can be changed to adjust the number of liquid separation channels 05, which is more adaptable.

[0043] Since the temperature of the liquid inlet port 01 is lower than the temperature of the liquid outlet port 02, the temperature of each liquid separation channel 05 in the liquid cooling plate 10 is not uniform. When the energy storage cell 20 is placed on the liquid cooling plate 10, the temperature uniformity is poor. In order to improve this problem, the structure of each liquid separation channel 05 is also improved in this embodiment. Specifically, at least two liquid separation channels 05 are provided with a liquid flow section 053 toward the liquid separation section 031, and the gap between the liquid flow section 053 of the liquid separation channel 05 close to the liquid inlet port 01 and the liquid separation section 031 is larger than the gap between the liquid flow section 053 of the liquid separation channel 05 far from the liquid inlet port 01 and the liquid separation section 031. Figure 4 The four liquid separation channels 05 on the middle right are provided with liquid passing sections 053. Such arrangement is beneficial, on the one hand, to make the path length of the branch channel where each liquid separation channel 05 is located between the liquid inlet port 01 and the liquid outlet port 02 tend to be consistent, thereby improving the temperature uniformity; on the other hand, since the temperature of the coolant at the liquid inlet port 01 is lower, such an arrangement is beneficial to maintaining the temperature balance of each liquid separation channel 05, thereby making the temperature of each energy storage battery cell 20 more balanced, which is beneficial to improving the temperature uniformity of each energy storage battery cell 20.

[0044] Still see Figure 4 The liquid outlet channel 04 includes a liquid outlet section 041 extending along the second direction and a liquid collection section 042 extending along the first direction; the liquid outlet section 041 is connected to the liquid outlet port 02 and is located on one side of each liquid distribution channel 05 along the first direction ( Figure 4 The liquid separation section 031 and the liquid collection section 042 are respectively located on both sides of the liquid cooling plate 10 along the second direction; each liquid separation channel 05 intersects with the liquid separation section 031 at the liquid separation inlet 06, and intersects with the liquid collection section 042 at the liquid separation outlet 07.

[0045] Specifically, the liquid separation channel 05 includes a plurality of first liquid separation channels 051 and a second liquid separation channel 052. Figure 4A total of four first liquid separation channels 051 are shown, and the second liquid separation channel 052 is located between the liquid outlet section 041 and the first liquid separation channel 051; the second liquid separation channel 052 includes a first section 054 and a second section 055 arranged along the second direction, the first section 054 is provided with at least two first liquid separation sub-channels 0541 arranged along the first direction and extending along the second direction, each first liquid separation sub-channel 0541 intersects with the liquid separation section 031 at the liquid separation inlet 06 and is connected to the second section 055, and the second section 055 and the liquid collection section 042 intersect at the liquid separation outlet 07; the second section 055 of the second liquid separation channel 052 is at least partially S-shaped. The first liquid separation channel 051 is provided with the above-mentioned liquid passing section 053. The second liquid separation channel 052 corresponds to at least two energy storage cells 20, see Figure 5 The second liquid separation channel 052 corresponds to two energy storage cells 20 , and at least two of the first liquid separation channels 051 close to the second liquid separation channel 052 correspond to the same energy storage cell 20 .

[0046] From the structural setting of the liquid separation channel 05, it can be seen that the liquid separation inlet 06 of the second liquid separation channel 052 is farthest from the liquid inlet port 01, so the temperature of the coolant in the second liquid separation channel 052 is higher than that of the other first liquid separation channel 051. The second liquid separation channel 052 includes a first section 054 and a second section 055 arranged along the second direction. The first section 054 is provided with at least two first liquid separation sub-channels 0541 arranged along the first direction and extending along the second direction. The flow rate of the first liquid separation sub-channel 0541 is fast, so that The second liquid-dividing flow channel 052 forms a first section 054 with a faster flow rate, so the temperature of the first section 054 is low, and the coolant of multiple first liquid-dividing sub-flow channels 0541 converges into the second section 055, so the temperature of the second section 055 is also relatively low. Therefore, the second liquid-dividing flow channel 052 is set so that although it is far away from the liquid inlet port 01, its temperature is still close to that of other first liquid-dividing flow channels 051, so that the temperature difference of the corresponding energy storage battery cells 20 is more balanced, thereby improving the temperature uniformity of each energy storage battery cell 20. Among them, the second sections 055 of each first liquid-dividing flow channel 051 and the second liquid-dividing flow channel 052 converge at the liquid collecting section 042, and the liquid collecting section 042 then flows into the liquid outlet section 041, with a fast liquid flow rate and fast heat exchange; the first liquid-dividing flow channel 051 is provided with a liquid passing section 053, which is conducive to processing.

[0047] Each first liquid-dividing flow channel 051 is at least partially S-shaped, and the second section 055 of the second liquid-dividing flow channel 052 is at least partially S-shaped, so that the flow resistance of the second liquid-dividing flow channel 052 is smaller than that of the first liquid-dividing flow channel 051 as a whole, and the second liquid-dividing flow channel 052 corresponds to at least two energy storage cells 20. Therefore, the flow rate of the second liquid-dividing flow channel 052 is fast, which is more conducive to taking away the heat of the energy storage cell 20 away from the liquid inlet port 01, thereby further improving the temperature uniformity of the energy storage cell 20; at least two first liquid-dividing flow channels 051 in the first liquid-dividing flow channel 052 near the second liquid-dividing flow channel 052 are 51 corresponds to the same energy storage cell 20, therefore, the number of first liquid separation channels 051 corresponding to the energy storage cell 20 located in the middle is larger, and the flow rate is faster, which is more conducive to reducing the temperature difference with the energy storage cell 20 close to the liquid inlet port 01; in addition, the S-shaped design of the first liquid separation channel 051 and the S-shaped design of the second section 055 of the second liquid separation channel 052 enable the coolant to flow from one side of the liquid cooling plate 10 to the other side and then flow to the side, thereby reducing the temperature difference on both sides of the liquid cooling plate 10 along the second direction, which is conducive to reducing the temperature difference on both sides of the energy storage cell 20 along the second direction.

[0048] Since the liquid collecting section 042 and the liquid outlet section 041 are both far away from the liquid inlet port 01, the temperature of the coolant in this part is relatively high, so that the temperature of the part of the energy storage cell 20 corresponding to the liquid collecting section 042 and the liquid outlet section 041 is relatively high, which is not conducive to the uniform temperature of the energy storage cell 20. For this reason, at least two first diverter strips 124 extending along the first direction are arranged at intervals in the liquid collecting section 042, and a second diverter strip 125 and a second diverter strip 125 are arranged at intervals in the first direction in the liquid outlet section 041. The second diverter strip 125 extends along the second direction, and the third diverter strip 126 includes a plurality of third sub-diverter strips arranged at intervals in the second direction. The arrangement of the first diverter strip 124, the second diverter strip 125 and the third diverter strip 126 increases the flow rate, thereby increasing the heat exchange efficiency. The arrangement of the second diverter strip 125 and the third diverter strip 126 in the liquid outlet section 041 is conducive to the rapid discharge of the hot coolant and improves the uniform temperature.

[0049] In this embodiment, see Figure 2 The liquid cooling plate 10 includes an upper cooling plate 11 and a lower cooling plate 12. The lower cooling plate 12 is punched to form a plurality of water grooves 121 with openings facing upward and a plurality of punched grooves 122 with openings facing downward. The upper cooling plate 11 and the lower cooling plate 12 are sealed and fixedly connected so that the water grooves 121 and the upper cooling plate 11 cooperate to form a flow channel. The punched grooves 122 include positioning grooves 123 extending along the second direction. The positioning grooves 123 are formed in the gap between the first liquid distribution channel 051 and the gap between the second liquid distribution channel 052 and the liquid outlet section 041. Figure 3, at least one positioning groove 123 is formed in the gap of the first liquid distribution channel 051 near the liquid inlet port 01, and at least one positioning groove 123 is formed in the gap of the first liquid distribution channel 051 near the second liquid distribution channel 052. In this embodiment, each positioning groove 123 corresponds to the edge of the energy storage cell 20. The provision of the positioning groove 123 enables the liquid cooling plate 10 to be better positioned when installed on the base, especially when the length of the liquid cooling plate 10 along the second direction is long. The above-mentioned provision enables the liquid cooling plate 10 to be pre-positioned by providing a structure corresponding to the positioning groove 123 on the base, and then the positioning of the liquid cooling plate 10 is achieved by locking the base with the first connecting hole 1231 and the second connecting hole 1232, thereby ensuring the flatness of the liquid cooling plate 10. Since the temperature of the first liquid-dividing flow channel 051 near the liquid inlet port 01 is relatively low, at least one positioning groove 123 is formed in the gap of the first liquid-dividing flow channel 051 near the liquid inlet port 01, which can prevent the temperature of the energy storage cell 20 near the liquid inlet port 01 from being too low; at least one positioning groove 123 is formed in the gap of the first liquid-dividing flow channel 051 near the second liquid-dividing flow channel 052, which can prevent the heat concentration of the middle first liquid-dividing flow channel 051, thereby reducing the temperature difference of the energy storage cell 20 in the middle. Each positioning groove 123 corresponds to the edge of the energy storage cell 20, which minimizes the influence on the heat dissipation of the energy storage cell 20.

[0050] The liquid cooling plate 10 is provided with at least one first connection hole 1231 at intervals along the second direction on the bottom wall of each positioning groove 123, and at least two second connection holes 1232 are also arranged at intervals along the second direction on both sides of the liquid cooling plate 10. The second connection holes 1232 on both sides of the liquid cooling plate 10 are symmetrically arranged, and each second connection hole 1232 is aligned with at least part of the first connection holes 1231 along the first direction. The second connection holes 1232 on both sides of the liquid cooling plate 10 are symmetrically arranged, so that the structure connecting the bottom bracket and the second connection holes 1232 can be of the same configuration, that is, the same process can be adopted, and the cost is lower; each second connection hole 1232 is at least partially aligned with the first connection hole 1231 along the first direction, which is convenient for opening holes on the one hand, and further makes the connection points between the liquid cooling plate 10 and the bottom bracket evenly distributed at multiple points and forms a local reinforcement structure, thereby further avoiding the bending and deformation of the liquid cooling plate 10.

[0051] It should be understood that in actual applications, the energy storage module 100 will also include electrical components such as a base, an outer cover, an energy storage cell 20, a wiring copper bus, a wiring terminal, a safety switch, and a sensor. The supporting assembly and the outer cover are fixedly connected to form a shell that can accommodate the energy storage cell 20. The energy storage cells 20 can be connected in series through the wiring copper bus and then electrically connected to external devices through the wiring terminal. This part belongs to the prior art and will not be repeated here.

[0052] The description of the above specification and embodiments is used to explain the protection scope of the utility model, but does not constitute a limitation on the protection scope of the utility model. Through the enlightenment of the utility model or the above embodiments, ordinary technicians in this field can obtain modifications, equivalent replacements or other improvements to the embodiments of the utility model or part of the technical features thereof through logical analysis, reasoning or limited experiments, which should be included in the protection scope of the utility model.

Claims

1. A liquid cooling plate (10) for cooling a battery module, wherein the battery module comprises at least two energy storage cells (20) arranged along a first direction, and the energy storage cells (20) extend along a second direction perpendicular to the first direction, wherein: The liquid cooling plate (10) is parallel to the first direction and the second direction. A liquid inlet port (01) and a liquid outlet port (02) are arranged along the first direction on one side of the liquid cooling plate (10) along the second direction. A flow channel is formed between the liquid inlet port (01) and the liquid outlet port (02). The flow channel comprises a liquid inlet flow channel (03) connected to the liquid inlet port (01), a liquid outlet flow channel (04) connected to the liquid outlet port (02), and at least two liquid separation flow channels (05) arranged corresponding to the energy storage battery cells (20). At least two of the liquid separation flow channels (05) are arranged along the first direction. The liquid inlet flow channel (03) is connected to the liquid inlet port (01), and the liquid outlet flow channel (04) is connected to the liquid outlet port (02). 03) is provided with a liquid separation section (031) extending along a first direction; each liquid separation channel (05) intersects with the liquid separation section (031) at a liquid separation inlet (06) and intersects with the liquid outlet channel (04) at a liquid separation outlet (07); at least two liquid separation channels (05) are provided with a liquid passing section (053) toward the liquid separation section (031), and the gap between the liquid passing section (053) of the liquid separation channel (05) close to the liquid inlet port (01) and the liquid separation section (031) is larger than the gap between the liquid passing section (053) of the liquid separation channel (05) far from the liquid inlet port (01) and the liquid separation section (031).

2. A liquid cooling plate (10) according to claim 1, characterized in that: The liquid outlet channel (04) comprises a liquid outlet section (041) extending along the second direction and a liquid collecting section (042) extending along the first direction; the liquid outlet section (041) is connected to the liquid outlet port (02) and is located on one side of each liquid distribution channel (05) along the first direction, and the liquid distribution section (031) and the liquid collecting section (042) are respectively located on two sides of the liquid cooling plate (10) along the second direction; the liquid distribution channel (05) intersects with the liquid collecting section (042) at a liquid distribution outlet (07) and comprises a plurality of first liquid distribution channels (051) and a second liquid distribution channel (052), wherein the second liquid distribution channel (052) is located at the liquid outlet section (02). 041) and the first liquid separation channel (051); the second liquid separation channel (052) includes a first section (054) and a second section (055) arranged along the second direction, the first section (054) is provided with at least two first liquid separation sub-channels (0541) arranged along the first direction and extending along the second direction, each first liquid separation sub-channel (0541) intersects with the liquid separation section (031) at a liquid separation inlet (06) and is connected to the second section (055), the second section (055) and the liquid collection section (042) intersect at a liquid separation outlet (07); the first liquid separation channel (051) is provided with the liquid passing section (053).

3. A liquid cooling plate (10) as claimed in claim 2, characterized in that: Each first liquid separation channel (051) is at least partially S-shaped, and the second section (055) of the second liquid separation channel (052) is at least partially S-shaped; the second liquid separation channel (052) corresponds to at least two energy storage cells (20); and at least two first liquid separation channels (051) in the first liquid separation channels (051) close to the second liquid separation channels (052) correspond to the same energy storage cell (20).

4. A liquid cooling plate (10) as claimed in claim 3, characterized in that: At least two first flow dividing strips (124) extending along the first direction are arranged in the liquid collecting section (042) at intervals along the first direction.

5. A liquid cooling plate (10) as claimed in claim 4, characterized in that: A second diverter strip (125) and a third diverter strip (126) are arranged at intervals along the first direction in the liquid outlet section (041); the second diverter strip (125) extends along the second direction; and the third diverter strip (126) includes a plurality of third sub-diverter strips arranged at intervals along the second direction.

6. A liquid cooling plate (10) according to any one of claims 2 to 5, characterized in that: The liquid cooling plate (10) comprises an upper cooling plate (11) and a lower cooling plate (12); the lower cooling plate (12) is punched to form a plurality of water grooves (121) opening upward and a plurality of punched grooves (122) opening downward; the upper cooling plate (11) and the lower cooling plate (12) are sealed and fixedly connected so that the water grooves (121) cooperate with the upper cooling plate (11) to form the flow channel; the punched grooves (122) comprise positioning grooves (123) extending along the second direction; the liquid cooling plate (10) is provided with at least one first connecting hole (1231) at intervals along the second direction on the bottom wall of each positioning groove (123); and at least two second connecting holes (1232) are also arranged at intervals along the second direction on both sides of the first direction.

7. A liquid cooling plate (10) according to claim 6, characterized in that: The positioning groove (123) is formed in the gap of the first liquid separation channel (051) and in the gap between the second liquid separation channel (052) and the liquid outlet section (041).

8. A liquid cooling plate (10) according to claim 7, characterized in that: At least one positioning groove (123) is formed in a gap of the first liquid distributing channel (051) close to the liquid inlet port (01), and at least one positioning groove (123) is formed in a gap of the first liquid distributing channel (051) close to the second liquid distributing channel (052); Each positioning groove (123) corresponds to an edge of the energy storage battery cell (20).

9. A liquid cooling plate (10) according to claim 6, characterized in that: The second connection holes (1232) on both sides of the liquid cooling plate (10) are symmetrically arranged, and each second connection hole (1232) is aligned with at least part of the first connection holes (1231) along a first direction.

10. An energy storage module (100), characterized in that: It adopts the liquid cooling plate (10) according to any one of claims 1 to 9.

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