Immersed battery cell cold plate

Abstract

The invention provides an immersed battery cell cold plate which comprises a hollow box plate and a heat exchange frame fixed in the hollow box plate, and a liquid inlet pipe and a liquid outlet pipe are mounted at two ends of one side wall of the hollow box plate; cooling liquid is filled between the heat exchange frame and the interior of the hollow box plate. The heat exchange frame comprises a first flow collecting chamber, a second flow collecting chamber and a heat exchange unit. The first flow collecting chamber and the second flow collecting chamber are both of a hollow structure, a partition piece is arranged in the first flow collecting chamber and divides the first flow collecting chamber into a liquid inlet cavity and a liquid outlet cavity which are independent, the liquid inlet cavity is communicated with a liquid inlet pipe, and the liquid outlet cavity is communicated with a liquid outlet pipe; the heat exchange units are a plurality of hollow plate bodies which are mounted between the first flow collecting chamber and the second flow collecting chamber and communicate the first flow collecting chamber with the second flow collecting chamber; and a plurality of turbulent flow strips are mounted on the inner wall of each heat exchange unit. The device is compact in structure, light in weight and low in nonferrous metal consumption; the material utilization rate is high and the manufacturability is good; the flow speed of cooling liquid in the cooling flow channel can be automatically adjusted through temperature changes.

Description

Technical Field

[0001] The invention belongs to the technical field of heat exchange of battery energy storage systems, and in particular relates to an immersed battery core cold plate. Background Art

[0002] The components of the battery energy storage system, especially the battery pack, need to operate normally and efficiently at an appropriate temperature. Therefore, when the battery pack is currently used, a heat exchange cold plate for heat exchange is placed at the bottom. The traditional heat exchange cold plate mainly includes a hollow plate body composed of an upper cover plate and a lower cover plate, and a coolant flow channel arranged in the hollow plate body. A heat exchange unit is arranged in the coolant flow channel. The hollow plate body is connected to pipes for inlet and outlet of the coolant. The coolant enters the coolant flow channel from the inlet pipe, flows in the coolant flow channel, and after heat exchange with the heat exchange unit, it flows out through the outlet pipe. In this way, the flow is continuously circulated, so that the battery pack works within the appropriate temperature range, ensuring that the battery can effectively dissipate heat in a high temperature environment to maintain its performance and safety, and ensuring that the battery pack can effectively heat up to a suitable temperature in a low temperature environment. The heat exchange cold plate has the following defects: (1) The inner wall of the traditional heat exchange cold plate is a smooth structure with poor turbulence performance. The coolant flow rate is too fast and the coolant flow rate in the flow channel cannot be controlled. The heat enters the components to be cooled without effective heat exchange, and the heat exchange efficiency is poor. In order to solve the heat exchange problem, the product shape needs to be enlarged, which brings about the problems of complex production process, increased consumption of non-ferrous metals, and increased costs.

[0003] (2) Traditional heat exchange cold plates are machined and then vacuum brazed after assembly. The coolant heat exchange unit is then welded using argon arc welding. This has high manufacturing costs, difficulty in quality assurance, and high skill requirements for argon arc welding operators.

[0004] (3) Traditional heat exchange cold plates are made by machining the flow channels and partitions with thick plates and then vacuum brazing them. The heat exchange units are welded to the heat exchange cold plates by manual argon arc welding. The material and processing costs are high, the pass rate is low, and argon arc welding requires high skills from the operator. Summary of the invention

[0005] In order to solve the above problems, the purpose of the present invention is to provide an immersed battery cell cold plate, which, on the one hand, can enable the components of the energy storage system to operate within a suitable temperature range, ensuring that the battery can effectively dissipate heat in a high temperature environment and maintain its performance and safety; on the other hand, it can reduce packaging and transportation costs and manufacturing costs.

[0006] The purpose of the present invention is achieved through the following technical solutions: An immersion cell cold plate comprises a hollow box plate formed by splicing an upper cover plate and a lower cover plate, wherein a liquid inlet pipe and a liquid outlet pipe are installed at both ends of one side wall of the hollow box plate; a heat exchange frame is also included which is fixed inside the hollow box plate, and a coolant is filled between the heat exchange frame and the inside of the hollow box plate, wherein the heat exchange frame comprises a first collecting chamber, a second collecting chamber and a heat exchange unit; the first collecting chamber and the second collecting chamber are both hollow structures, and a spacer is provided inside the first collecting chamber, and the spacer separates the first collecting chamber from the first collecting chamber; The flow chamber is divided into an independent liquid inlet chamber and a liquid outlet chamber, wherein the liquid inlet chamber is connected to the liquid inlet pipe, and the liquid outlet chamber is connected to the liquid outlet pipe; the heat exchange unit is a plurality of hollow plates installed between the first collecting chamber and the second collecting chamber and connecting the first collecting chamber with the second collecting chamber, the heat exchange unit close to the liquid inlet pipe is connected to the liquid inlet chamber of the first collecting chamber, and the heat exchange unit close to the liquid outlet pipe is connected to the liquid outlet chamber of the first collecting chamber; a plurality of raised turbulence strips are installed on the inner wall of each heat exchange unit.

[0007] Furthermore, in order to improve the heat exchange efficiency, the first collecting chamber and the second collecting chamber are both provided with raised spoiler ribs.

[0008] Furthermore, in order to divide the coolant in the heat exchange unit into multiple streams so that the heat exchange unit can more fully exchange heat with the coolant outside the heat exchange rack, and then the coolant exchanges heat with the battery pack, thereby improving the heat exchange efficiency, a plurality of partitions are provided inside the heat exchange unit, and the partitions divide the interior of the heat exchange unit into a plurality of cooling channels connecting the first collecting chamber and the second collecting chamber.

[0009] Furthermore, in order to improve the heat exchange efficiency, the temperature change is used to automatically change the blocking surface in the cooling channel, thereby realizing the automatic control of the coolant flow rate in the cooling channel, and each cooling channel is provided with a plurality of turbulence strips. The turbulence strip is a thermal bimetal strip with a wide surface facing the first collecting chamber and suspended in the air, the head end of the turbulence strip is arranged close to the first collecting chamber and fixed on the inner wall of the cooling channel, the tail end of the turbulence strip is arranged away from the first collecting chamber and suspended in the air, and a limit rod is provided on the inner wall of the cooling channel where the head end of the turbulence strip is located, near the tail end of the turbulence strip, and the line connecting the limit rod and the head end of the turbulence strip is parallel to the straight-line distance line connecting the first collecting chamber and the second collecting chamber, and the main body of the turbulence strip can be deflected toward the limit rod after being heated.

[0010] Furthermore, in order to improve the heat exchange efficiency between the coolant outside the heat exchange frame and the coolant inside the heat exchange frame, a plurality of fins are provided on the outer walls of the wide surfaces on both sides of the heat exchange unit.

[0011] Compared with the prior art, the present invention has the following beneficial effects: (1) Compact structure, light weight, and low consumption of non-ferrous metals. The inner wall of the heat exchange unit is designed with convex turbulent flow strips to increase the turbulent effect, which is beneficial to improve the flow rate of the coolant in the tube and improve the heat dissipation performance. There is no need to increase the heat dissipation area and waste non-ferrous metal consumption, so the cost is low.

[0012] (2) High material utilization rate and good processability. The collecting chamber is designed as a thin plate stamping part, with high material utilization rate and low cost; the vacuum brazing and manual argon arc welding heat exchange unit are combined into a one-time brazing integral forming, with good processability, reliable products, high productivity and low manufacturing cost. The collecting chamber is designed with a fixed buckle, which can effectively fix the sealing plate in the collecting chamber, without the need for special tooling and low investment.

[0013] (3) The coolant blocking area in the cooling channel can be changed by changing the temperature, thereby realizing automatic adjustment of the coolant flow rate in the cooling channel to avoid excessive temperature at the tail end of the channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described in detail below with reference to the accompanying drawings.

[0015] Figure 1 This is an assembly diagram of the heat exchange frame in the immersed battery cell cold plate of the present invention. The middle figure in the figure is a top view of the heat exchange frame, the upper figure is a bottom view of the heat exchange frame, the lower figure is a top view of the heat exchange frame, and the right figure is a left view of the heat exchange frame.

[0016] Figure 2 for Figure 1 A partial enlarged view of point A in the middle.

[0017] Figure 3 This is a diagram of the exploded structure of the heat exchange frame in the immersed battery cell cold plate of the present invention.

[0018] Figure 4 It is a schematic structural diagram of the current collecting plate of the present invention.

[0019] Figure 5 It is a structural schematic diagram of the sealing plate described in the present invention.

[0020] Figure 6 It is a schematic diagram of the structure of the separator of the present invention.

[0021] Figure 7 It is a cross-sectional view of the heat exchange unit of the present invention.

[0022] As shown in the figure: 1-first collecting chamber, 2-second collecting chamber, 3-heat exchange unit, 4-liquid inlet pipe, 5-liquid outlet pipe, 6-spacer, 7-collecting plate, 71-connecting hole, 8-sealing plate, 81-liquid inlet connection port, 82-liquid outlet connection port, 9-partition, 10-cooling channel, 11-turbulence strip, 12-limiting rod. DETAILED DESCRIPTION

[0023] The following is an explanation of the implementation of the present invention by specific specific embodiments. People familiar with the technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that the structures, proportions, sizes, etc. drawn in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Example 1

[0026] like Figure 1-7 As shown, this embodiment provides an immersion cell cold plate, including a hollow box plate formed by an upper cover plate and a lower cover plate, the hollow box plate is made of a high thermal conductivity metal material (such as an aluminum alloy material), and its top is bonded to the battery pack. A liquid inlet pipe 4 and a liquid outlet pipe 5 are installed at both ends of one of the side walls of the hollow box plate. The liquid inlet pipe 4 and the liquid outlet pipe 5 are arranged in the same direction, which is conducive to increasing the coolant circulation time and improving the heat exchange efficiency. In addition, the immersion cell cold plate also includes a heat exchange frame made of metal material. The heat exchange frame is fixed inside the hollow box plate, enclosed in the hollow box plate by the upper cover plate and the lower cover plate, and the heat exchange frame and the inside of the hollow box plate are filled with coolant (the heat exchange frame is immersed in the coolant inside the hollow box plate). The heat exchange frame includes a first collecting chamber 1, a second collecting chamber 2 and a heat exchange unit 3.

[0027] The first collecting chamber 1 and the second collecting chamber 2 are both hollow structures and are parallel to each other, which play a guiding role for the coolant. The first collecting chamber 1 and the second collecting chamber 2 are formed by the sealing plate 8 located on the outside and the collecting plate 7 located on the inside to form a box-like structure, and then assembled with the heat exchange unit 3 as an assembly and brazed by nitrogen shielded welding. The sealing plate 8 and the collecting plate 7 are both semi-box-shaped structures obtained by stamping and surface treatment of aluminum alloy thin plate materials. This manufacturing method has high material utilization and productivity and low cost. The inner side of the sealing plate 8 and the collecting plate 7 are provided with raised spoiler ribs. Moreover, the sealing plate 8 and the collecting plate 7 are snap-fitted to form the first collecting chamber 1 and the second collecting chamber 2 of the box-like structure. After adopting this structure, the sealing plate 8 is not easy to be misplaced, the welding pass rate is high, no special tooling is required, and a firm sealing surface is formed after brazing, which has high reliability and low cost. The liquid inlet pipe 4 is fixed to the preset liquid inlet connection port 81 on the sealing plate 8 in the first collecting chamber 1 by riveting and then sealed by brazing. The liquid outlet pipe 5 is fixed to the preset liquid outlet connection port 82 on the sealing plate 8 in the first collecting chamber 1 by riveting and then sealed by brazing.

[0028] A partition 6 is provided inside the first collecting chamber 1 to block the low temperature at the inlet and the high temperature at the outlet. The partition 6 is made of aluminum alloy material after stamping and surface treatment. The partition 6 is fixed between the sealing plate 8 and the collecting plate 7 to separate the first collecting chamber 1 into an independent liquid inlet chamber and a liquid outlet chamber, wherein the liquid inlet chamber is connected to the liquid inlet pipe, and the liquid outlet chamber is connected to the liquid outlet pipe.

[0029] The heat exchange unit 3 is a plurality of (five in the figure, which can be increased or decreased according to demand) hollow plates installed between the first collecting chamber 1 and the second collecting chamber 2 to connect the first collecting chamber 1 with the second collecting chamber 2. The heat exchange unit 3 is processed by a hot extrusion process. The two heat exchange units 3 close to the liquid inlet pipe 4 are connected to the liquid inlet chamber of the first collecting chamber 1, and the three heat exchange units 3 close to the liquid outlet pipe 5 are connected to the liquid outlet chamber of the first collecting chamber 1. A plurality of raised turbulence strips 11 are installed on the inner wall of each heat exchange unit 3, and the turbulence strips 11 are key components for the system heat exchange. During operation, the coolant enters the liquid inlet cavity of the first collecting chamber 1 from the liquid inlet pipe 4, and then enters the second collecting chamber 2 through the two heat exchange units 3 in the inlet section (the two heat exchange units 3 connected to the liquid inlet cavity of the first collecting chamber 1), and then flows out from the second collecting chamber 2 to the three heat exchange units 3 in the outlet section (the three heat exchange units 3 connected to the liquid outlet cavity of the first collecting chamber 1), enters the liquid outlet cavity of the first collecting chamber 1 through the three heat exchange units 3 in the outlet section, and finally flows out through the liquid outlet pipe 5 to the external heat exchange equipment to form a circulating heat dissipation.

[0030] The two ends of the heat exchange unit 3 are respectively connected to the collecting plate 7 of the first collecting chamber 1 and the collecting plate 7 of the second collecting chamber 2. A connecting hole 71 is opened on the collecting plate 7 to connect and penetrate the heat exchange unit 3. The matching clearance is designed to be 0.08mm. After being assembled with the matching parts, they are brazed as a whole, with high productivity and low manufacturing cost. A plurality of partitions 9 are arranged horizontally inside the heat exchange unit 3. The partitions 9 divide the interior of the heat exchange unit 3 into a plurality of cooling channels 10 connecting the first collecting chamber 1 and the second collecting chamber 2. The cooling channels 10 are arranged horizontally. Each cooling channel 10 is provided with a plurality of turbulent strips 11 to increase the turbulent effect, which is conducive to improving the flow rate of the coolant in the cooling channel 10, and the heat dissipation performance is improved. There is no need to increase the heat dissipation area and waste non-ferrous metal consumption, and the cost is low. Working principle:

[0031] The coolant is used to control the battery pack temperature within an appropriate temperature range.

[0032] When the ambient temperature is too low, lower than the temperature range suitable for the battery pack to work, the coolant with a temperature close to the suitable working temperature of the battery pack enters the liquid inlet cavity of the first collecting chamber 1 from the liquid inlet pipe 4, and then flows into the two heat exchange units 3 connected to the liquid inlet cavity, and then flows through the second collecting chamber 2, the three heat exchange units 3 connected to the liquid outlet cavity, and the liquid outlet cavity of the first collecting chamber 1 in turn, and then flows out from the liquid outlet pipe 5. During the flow of the coolant, it will be blocked by the turbulence strips 11 in the heat exchange unit 3 to form turbulence, and the flow rate will be reduced at the same time, so as to fully exchange heat with the coolant outside the heat exchange unit 3, and transfer heat to the coolant outside the heat exchange unit 3. After the coolant outside the heat exchange unit 3 is heated, it transfers the heat to the battery pack, so that the temperature of the battery pack rises to a suitable working temperature, and this cycle continues until the temperature of the battery pack rises to a range close to the temperature of the coolant inside the heat exchange unit 3. As the battery pack starts working, it will also generate heat. When the heat of the battery pack is higher than the coolant inside the heat exchange unit 3, the battery pack will transfer the heat to the coolant outside the heat exchange unit 3 through the upper cover plate. The temperature of the coolant outside the heat exchange unit 3 increases, and then the coolant outside the heat exchange unit 3 transfers the heat through the heat exchange unit 3 to the coolant inside the heat exchange unit 3. The heat is then taken out to the external heat dissipation equipment through the continuous flow of the coolant inside the heat exchange unit 3 for heat dissipation and cooling, and then flows back to the heat exchange unit 3.

[0033] During the above heat exchange process, the presence of the turbulent strips 11 in the heat exchange unit 3 can reduce the flow velocity in the heat exchange unit 3, thereby fully achieving heat exchange. Example 2

[0034] In the heat exchange process of Example 1, the presence of the turbulent strips 11 in the heat exchange unit 3 can reduce the flow rate in the heat exchange unit 3. Although sufficient heat exchange can be achieved, when the ambient temperature of the battery pack is too high or the battery pack is running under high load, causing its temperature to be too high (significantly higher than the suitable operating temperature range of the battery pack), it is very likely that the coolant in the outlet heat exchange unit 3 will be high in temperature. At this time, the internal coolant temperature of the three heat exchange units 3 (ends) in the outlet section will be higher than the external coolant temperature of the heat exchange unit 3. Due to the turbulent flow, the flow rate of the coolant in the heat exchange unit 3 slows down, resulting in reverse heat transfer, causing the external coolant temperature of the heat exchange unit 3, which has just passed through the heat exchange unit 3 for heat exchange and cooling, to rise again, resulting in too low heat exchange efficiency. For this reason, this embodiment adds the following settings on the basis of Example 1.

[0035] The turbulence strip 11 is a thermal bimetallic strip with its wide surface facing the first collecting chamber 1 and suspended. The head end of the turbulence strip 11 is arranged near the first collecting chamber 1 and fixed on the inner wall of the cooling channel 10, and the tail end of the turbulence strip 11 is arranged away from the first collecting chamber 1 and suspended, that is, the turbulence strip 11 is obliquely arranged in the cooling channel 10, and the angle between the projection line of the straight-line distance connecting the first collecting chamber 1 and the second collecting chamber 2 on the installation surface of the turbulence strip 11 and the turbulence strip 11 is 60°. When the temperature of the coolant in the initial cooling channel 10 is not high, the turbulence strip 11 does not deform, and its wide surface inclined and facing the first collecting chamber 1 is the blocking surface for blocking the flow of coolant in the heat exchange unit 3. The existence of the blocking surface makes the flow speed of the coolant in the heat exchange unit 3 slower than that of the heat exchange unit 3 without the turbulence strip 11. A limit rod 12 is provided on the inner wall of the cooling channel 10 where the head end of the turbulence strip 11 is located, near the tail end of the turbulence strip 11. Figure 7 As shown in the figure, the limit rod 12 is located below the tail end of the turbulence strip 11 to prevent the turbulence strip 11 from being excessively deflected). The line connecting the limit rod 12 and the head end of the turbulence strip 11 is parallel to the straight-line distance line connecting the first collecting chamber 1 and the second collecting chamber 2. The main body of the turbulence strip 11 can be deflected toward the limit rod 12 after being heated, so that the angle between the projection line of the straight-line distance line connecting the first collecting chamber 1 and the second collecting chamber 2 on the installation surface of the turbulence strip 11 becomes smaller, and the turbulence strip 11 gradually becomes parallel to the straight-line distance line connecting the first collecting chamber 1 and the second collecting chamber 2. The blocking area of ​​the blocking surface that blocks the flow of coolant in the heat exchange unit 3 becomes smaller, thereby gradually increasing the flow rate of the coolant in the heat exchange unit 3. That is to say, when the temperature of the coolant in the heat exchange unit 3 increases, the turbulence strip 11 is deflected, the blocking area of ​​the blocking surface becomes smaller, and the flow rate of the coolant in the heat exchange unit 3 near the deflected turbulence strip 11 will increase. The turbulence strip 11 is composed of an active layer and a passive layer. The thermal expansion coefficient of the active layer is greater than that of the passive layer. The active layer is made of brass and is disposed toward the limit rod, while the passive layer is made of iron and is disposed away from the limit rod. Working principle:

[0036] When the ambient temperature is too low or the heat generated by the battery pack is low, the turbulence strip 11 does not deform, and its working principle is consistent with that of embodiment 1.

[0037] However, when the temperature of the battery pack's surrounding environment is too high or the battery pack's temperature is too high under high load operation, exceeding its suitable operating temperature range, the external coolant of the heat exchange unit 3 fully exchanges heat with the battery pack and heats up, and then fully exchanges heat with the low-temperature coolant inside the two heat exchange units 3 in the inlet section (the heat exchange unit 3 connected to the liquid inlet cavity of the first collecting chamber 1) and the temperature rises, and then enters the second collecting chamber 2, and after being diverted in the second collecting chamber 2, enters the three heat exchange units 3 in the outlet section (connected to the liquid outlet cavity of the first collecting chamber 1). In this process, due to the blocking effect of the turbulence strips 11, the flow rate becomes lower, thereby achieving sufficient heat exchange with the external coolant of the heat exchange unit 3. After the temperature of the coolant inside the heat exchange unit 3 rises to a certain range, the turbulence strips 11 (especially the turbulence strips 11 at the tail ends of the three heat exchange units 3 in the outlet section) The strip 11) undergoes dynamic deformation (deformation as the temperature changes) when heated, and gradually deflects in the direction of the straight-line distance connecting the first collecting chamber 1 and the second collecting chamber 2. The blocking surface of the turbulent strip 11 on the coolant in the heat exchange unit 3 becomes smaller, thereby making the flow rate of the coolant relatively faster, so that the flow rate of the coolant in the three heat exchange units 3 in the outlet section when flowing through the three heat exchange units 3 in the outlet section (especially the last section) is accelerated, and the heat is quickly taken away to avoid reverse heat transfer, which improves the heat exchange efficiency in disguise. When the heat generated by the battery pack is too large, the flow rate of the coolant in the heat exchange unit 3 gradually increases (dynamically changes the flow rate) from the liquid inlet cavity of the first collecting chamber 1, the three heat exchange units 3 in the inlet section, the second collecting chamber 2, the three heat exchange units 3 in the outlet section, and the liquid outlet cavity of the first collecting chamber 1, thereby improving the heat exchange efficiency. Example 3

[0038] The difference between this embodiment and embodiment 1 or 2 is that a plurality of fins are provided on the outer walls of the wide sides of the heat exchange unit 3. The presence of the fins can speed up the heat exchange speed between the coolant inside the heat exchange unit 3 and the coolant outside the heat exchange unit 3, thereby improving the heat exchange efficiency.

[0039] Other aspects of the present invention that are not described in detail are all conventional techniques known to those skilled in the art.

[0040] It should be noted that the terms "comprises", "includes" or any other variations are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0041] The protection scope of the present invention is not limited to the technical solutions disclosed in the specific implementation methods. Any modifications, equivalent replacements, improvements, etc. made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. An immersion cell cold plate, comprising a hollow box plate formed by splicing an upper cover plate and a lower cover plate, wherein a liquid inlet pipe and a liquid outlet pipe are installed at both ends of one side wall of the hollow box plate; characterized in that: It also includes a heat exchange frame fixed inside the hollow box plate, and the heat exchange frame and the inside of the hollow box plate are filled with coolant, the heat exchange frame includes a first collecting chamber, a second collecting chamber and a heat exchange unit; the first collecting chamber and the second collecting chamber are both hollow structures, and a partition is provided inside the first collecting chamber, the partition divides the first collecting chamber into an independent liquid inlet chamber and a liquid outlet chamber, wherein the liquid inlet chamber is connected to the liquid inlet pipe, and the liquid outlet chamber is connected to the liquid outlet pipe; the heat exchange unit is a plurality of hollow plate bodies installed between the first collecting chamber and the second collecting chamber and connecting the first collecting chamber and the second collecting chamber, the heat exchange unit close to the liquid inlet pipe side is connected to the liquid inlet chamber of the first collecting chamber, and the heat exchange unit close to the liquid outlet pipe side is connected to the liquid outlet chamber of the first collecting chamber; a plurality of raised turbulence strips are installed on the inner wall of each heat exchange unit.

2. The immersed cell cold plate according to claim 1, characterized in that: The first collecting chamber and the second collecting chamber are both formed by splicing a sealing plate located on the outside and a collecting plate located on the inside to form a box-like structure, and then assembled with the heat exchange unit into an assembly and brazed by nitrogen shielded welding. The sealing plate and the collecting plate are both semi-box-shaped structures obtained by stamping out thin plates, wherein the two ends of the heat exchange unit are respectively connected to the collecting plate of the first collecting chamber and the collecting plate of the second collecting chamber, and a connecting hole is opened on the collecting plate to connect and fix with the heat exchange unit and pass through; the liquid inlet pipe and the liquid outlet pipe are respectively connected to the liquid inlet connection port and the liquid outlet connection port preset on the sealing plate in the first collecting chamber.

3. The immersed cell cold plate according to claim 2, characterized in that: The sealing plate and the current collecting plate are assembled together by snapping to form a first current collecting chamber and a second current collecting chamber of a box-shaped structure.

4. The immersed cell cold plate according to claim 2, characterized in that: The partition in the first collecting chamber is fixed between the sealing plate and the collecting plate to divide the inner part of the first collecting chamber into a liquid inlet chamber and a liquid outlet chamber.

5. The immersed cell cold plate according to claim 2, characterized in that: The sealing plates and inner sides of the current collecting plates of the first collecting chamber and the second collecting chamber are both provided with raised spoiler ribs.

6. The immersed cell cold plate according to any one of claims 1 to 5, characterized in that: A plurality of partitions are arranged inside the heat exchange unit, and the partitions divide the interior of the heat exchange unit into a plurality of cooling channels connecting the first collecting chamber and the second collecting chamber.

7. The immersed battery cell cold plate according to claim 6, characterized in that: Each cooling channel is provided with a plurality of turbulence strips.

8. The immersed cell cold plate according to claim 7, characterized in that: The turbulence strip is a thermal bimetal strip with its wide surface facing the first collecting chamber and suspended. The head end of the turbulence strip is arranged close to the first collecting chamber and fixed on the inner wall of the cooling channel, and the tail end of the turbulence strip is arranged away from the first collecting chamber and suspended. A limit rod is provided on the inner wall of the cooling channel where the head end of the turbulence strip is located, near the tail end of the turbulence strip. The line connecting the limit rod and the head end of the turbulence strip is parallel to the straight-line distance line connecting the first collecting chamber and the second collecting chamber. The main body of the turbulence strip can be deflected toward the limit rod after being heated.

9. The immersed cell cold plate according to claim 8, characterized in that: The angle between the projection line of the straight-line distance connecting the first collecting chamber and the second collecting chamber on the turbulence strip installation surface and the turbulence strip is 15-90°.

10. The immersed battery cell cold plate according to claim 6, characterized in that: A plurality of fins are arranged on the outer walls of the wide surfaces on both sides of the heat exchange unit.

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