Manifold immersion jet type battery thermal management module

Abstract

The invention relates to a manifold immersion jet type battery thermal management module, and belongs to the technical field of liquid-cooled battery thermal management. The battery thermal management module comprises a battery box, a micro-channel bottom plate, a battery and an inlet and outlet manifold layer. The inlet and outlet manifold layer is composed of an inlet manifold layer and an outlet manifold layer, and the inlet manifold layer and the outlet manifold layer are arranged in a staggered mode on the same horizontal layer or arranged in an up-down penetrating mode on the upper layer and the lower layer. The inlet manifold layer is provided with inlet weirs and jet holes, and the outlet manifold layer is provided with outlet holes staggered with the jet holes. According to the invention, the distribution uniformity of the heat exchange working medium in each battery gap can be improved, the battery temperature difference value at different positions in the battery box is reduced, and the maximum temperature difference of the battery pack in the whole battery box is obviously reduced. Meanwhile, the heat exchange working medium flows through each battery in a roundabout manner, the flow speed of the heat exchange working medium between the side walls of the batteries is increased, the convective heat transfer coefficient of the heat exchange working medium and the side walls of the batteries is greatly increased, and the heat transfer effect is remarkably improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of liquid-cooled battery thermal management, and in particular relates to a manifold immersed jet type battery thermal management module. Background Art

[0002] Lithium-ion batteries have been widely adopted in the electric vehicle and electrochemical energy storage industries due to their many advantages, such as high energy density, fast response speed, low self-discharge rate, and long cycle life. However, it should be noted that the temperature of the battery directly affects its performance and life. Too high or too low temperature will have a negative impact on the battery. In particular, too high operating temperature may cause a significant decrease in battery capacity, thermal runaway, and even fire hazards. Therefore, in order to ensure the safe, stable and efficient operation of lithium-ion batteries, the optimal operating temperature of the battery is generally maintained between 25°C and 40°C, and the maximum temperature difference of the single battery in the battery module should be controlled below 5°C. Therefore, building an effective battery thermal management system is crucial to keeping the battery temperature within the appropriate range to reduce thermal safety issues and maximize battery life.

[0003] Battery thermal management technologies include air cooling technology, liquid cooling technology, phase change material cooling technology, heat pipe cooling technology and a combination of the above cooling technologies. Among them, liquid cooling technology has gradually become the mainstream cooling technology for battery thermal management systems due to its advantages such as high heat transfer efficiency, fast cooling speed and compact structure, and is widely popular in the fields of power batteries and energy storage batteries.

[0004] Liquid cooling technology can be divided into direct cooling technology and indirect cooling technology according to the contact method between the coolant and the battery. Direct cooling technology is to directly contact the battery with the coolant, generally immersing the battery in the coolant, so it is also called immersion cooling technology. Indirect cooling technology transfers the heat generated by the battery to the coolant through cooling plates, micro channels, heat-conducting structures or jackets. Since the coolant of the immersion cooling technology is in direct contact with the battery and there is no contact thermal resistance, the immersion battery thermal management system has a higher heat transfer efficiency.

[0005] Conventional immersion battery thermal management systems, such as Figure 1 As shown, the heat exchange medium flows in parallel through the bottom channel and then flows out from the upper channel, so that the battery unit as a whole can fully exchange heat with the liquid, thereby achieving temperature regulation of the battery pack. However, this structure easily leads to uneven distribution of the heat exchange medium between each battery gap, resulting in unequal temperature differences of batteries at different positions in the battery box, which increases the maximum temperature difference of the battery pack in the entire battery box. On the other hand, the flow rate of the heat exchange medium in the immersion battery thermal management system is generally low, which belongs to laminar flow in the field of fluid mechanics. Therefore, the convective heat transfer coefficient between the heat exchange medium and the battery side wall is low, resulting in weak heat transfer effect. Summary of the invention

[0006] The purpose of the present invention is to provide a manifold immersed jet battery thermal management module with a simple structure and reasonable design in order to solve the above problems.

[0007] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0008] A manifold immersed jet battery thermal management module, comprising a battery box, a micro-channel bottom plate is provided on the bottom wall of the battery box, a plurality of batteries are provided on the micro-channel bottom plate, a battery gap is formed between the battery box and the plurality of batteries, a manifold layer for conveying a heat dissipation medium is provided on the top of the battery box, and the manifold layer is divided into an inlet manifold layer and an outlet manifold layer;

[0009] The inlet manifold layer is provided with a working medium inlet, the outlet manifold layer is provided with a working medium outlet, the bottom of the inlet manifold layer is provided with a plurality of rows of jet holes, the bottom of the outlet manifold layer is provided with a plurality of rows of outlet holes staggered with the jet holes, the heat dissipating working medium flows downward from the jet holes into the battery gap on one side of the battery, then turns back through the micro-channel bottom plate, flows upward into the battery gap on the other side of the battery, and reaches the outlet holes.

[0010] As a further optimization scheme of the present invention, a plurality of the batteries are linearly arranged at equal intervals on the microchannel bottom plate, and the inlet manifold layer and the outlet manifold layer are arranged alternately with each other in the same horizontal layer; or the upper and lower layers are arranged vertically through each other.

[0011] As a further optimization solution of the present invention, the total flow cross-sectional area of ​​each jet hole is smaller than the total flow cross-sectional area of ​​each outlet hole.

[0012] As a further optimization solution of the present invention, an inlet weir is provided upstream of the inlet manifold layer, and an outlet weir is provided downstream of the outlet manifold layer.

[0013] As a further optimization solution of the present invention, the inlet manifold layer and the outlet manifold layer are arranged in a staggered manner with each other in the same horizontal layer;

[0014] The inlet manifold layer is composed of a first main stream segment and a plurality of first branch stream segments, the inner cavity of the first main stream segment is the upstream of the inlet manifold layer, and the inner cavity of the first branch stream segment is the downstream of the inlet manifold layer;

[0015] The outlet manifold layer consists of a second main stream segment and a plurality of second branch stream segments, the inner cavity of the second main stream segment is downstream of the outlet manifold layer, the inner cavity of the second branch stream segment is upstream of the outlet manifold layer, and the first main stream segment and the second main stream segment are interlaced.

[0016] As a further optimization scheme of the present invention, the working fluid inlet is arranged at one end of the first main stream section, and the jet hole is arranged on the bottom wall of the first branch stream section; the working fluid outlet is arranged at one end of the second main stream section, and the outlet hole is arranged on the bottom wall of the second branch stream section.

[0017] As a further optimization scheme of the present invention, the inlet manifold layer and the outlet manifold layer are arranged in two layers in an up-and-down through-type arrangement, and the outlet manifold layer is located between the inlet manifold layer and the battery box;

[0018] The inlet manifold layer is composed of a first external section and a first internal section, the inner cavity of the first external section is the upstream of the inlet manifold layer, and the inner cavity of the first internal section is the downstream of the inlet manifold layer;

[0019] The outlet manifold layer is composed of a second external section and a second internal section, the inner cavity of the second external section is the downstream of the outlet manifold layer, and the inner cavity of the second internal section is the upstream of the outlet manifold layer.

[0020] As a further optimization scheme of the present invention, the working fluid inlet is arranged in the middle of the first external section, the jet hole is arranged on the bottom wall of the first internal section, the bottom wall of the first internal section extends downward from the jet hole to form a through tube, and the through tube passes through the second internal section; the working fluid outlet is arranged in the middle of the second external section, and the outflow hole is arranged on the bottom wall of the second internal section.

[0021] As a further optimization solution of the present invention, the micro-channel bottom plate is composed of a lower plate body and a plurality of fins formed by protruding upward from the top of the lower plate body, and micro-channels are formed between adjacent fins.

[0022] As a further optimization scheme of the present invention, the fins are provided with limiting grooves corresponding to the batteries one by one, the width of the battery gap is 2-5 mm, the thickness of the fins is 2-4 mm, and the width of the micro-channels is 2-5 mm.

[0023] The beneficial effects of the present invention are:

[0024] 1) The present invention adopts the structure and arrangement design of the inlet and outlet manifold layer, the equally spaced batteries and the micro-channel bottom plate, so that the heat exchange medium enters the gap between the batteries from the inlet manifold layer in an intermittent manner, and is turned back through the micro-channel bottom plate to flow through the adjacent gaps of the battery and then discharged through the outlet manifold layer, so that the heat exchange medium flows through the two largest area side walls of the battery in a circuitous manner, prolonging the contact time of each heat exchange medium with a single battery, improving the convective heat exchange intensity between the heat exchange medium and the battery, and thus significantly improving the heat exchange between the heat exchange medium and the battery;

[0025] 2) The inlet and outlet manifold layer of the present invention is composed of an inlet manifold layer and an outlet manifold layer, which are arranged in a staggered manner in the same horizontal layer, or arranged in an upper and lower layer through-through manner. An inlet weir is arranged upstream of the inlet manifold layer perpendicular to the flow direction of the working medium. Such a structural design allows the heat exchange working medium entering the inlet manifold layer to flow over the inlet weir at the same height of the liquid level, so that the heat exchange working medium can flow into the battery gap below in equal amounts and evenly at intervals;

[0026] 3) The present invention sets multiple rows of jet holes or multiple rows of jet holes in the inlet manifold layer, which greatly improves the flow speed of the heat exchange medium in the battery gap, changes the original laminar flow state into a turbulent flow state, and further improves the convective heat transfer coefficient between the heat exchange medium and the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of a conventional immersed battery thermal management system;

[0028] Figure 2 This is an overall structural diagram of a single-layer horizontal manifold immersed jet battery thermal management module according to Embodiment 1 of the present invention;

[0029] Figure 3 is an exploded diagram of a battery thermal management module according to Embodiment 1 of the present invention;

[0030] Figure 4 yes Figure 2 AA view of the middle horizontal single-layer manifold layer;

[0031] Figure 5 yes Figure 2 BB view of the middle horizontal single-layer manifold layer;

[0032] Figure 6 is a schematic structural diagram of a microchannel plate of the present invention;

[0033] Figure 7 This is the overall structure diagram of the upper and lower double-layer manifold immersed jet battery thermal management module of Example 2 of the present invention;

[0034] Figure 8 is an exploded diagram of a battery thermal management module according to Embodiment 2 of the present invention;

[0035] Fig. 9 yes Figure 7 AA view of the middle and upper double manifold layers;

[0036] Fig.10 yes Figure 7 BB view of the middle and upper double manifold layers;

[0037] Fig.11 yes Figure 7 CC view of the middle and upper double manifold layers;

[0038] Fig.12 This is a comparative temperature cloud diagram of the battery in the module under different structural schemes at the end of discharge at a 3x discharge rate.

[0039] In the figure: 1, battery box; 2, micro-channel bottom plate; 21, fin; 22, limit groove; 3, battery; 4, manifold layer; 4a, inlet manifold layer; 4b, outlet manifold layer; 41, working fluid inlet; 42, working fluid outlet; 43, inlet weir; 44, jet hole; 44a, through pipe; 45, outlet hole; 46, outlet weir. DETAILED DESCRIPTION

[0040] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0041] Example 1

[0042] like Figure 2-6 As shown, this embodiment relates to a manifold immersed jet battery thermal management module, including a battery box 1, a micro-channel bottom plate 2, a plurality of batteries 3 and an inlet and outlet manifold layer 4. Among them, the micro-channel bottom plate 2 is placed on the inner bottom surface of the battery box 1, and the plurality of batteries 3 are arranged linearly at equal intervals, and each battery 3 is placed on the micro-channel bottom plate 2 in a vertically staggered manner, and the inlet and outlet manifold layer 4 is placed on the battery 3. The inlet and outlet manifold layer 4 is composed of an inlet manifold layer 4a and an outlet manifold layer 4b, which together constitute a mutually staggered structure of the same horizontal layer.

[0043] The inlet manifold layer 4a is composed of a first main stream section and a plurality of first branch stream sections. The inner cavity of the first main stream section is upstream of the inlet manifold layer 4a, and the inner cavity of the first branch stream section is downstream of the inlet manifold layer 4a. A working fluid inlet 41 is provided at one end of the first main stream section. The first main stream section is strip-shaped as a whole, and one end of the first main stream section close to the working fluid inlet 41 is bent backwards, and the first branch stream section is perpendicular to the first main stream section.

[0044] The outlet manifold layer 4b is composed of a second main stream segment and a plurality of second branch stream segments. The inner cavity of the second main stream segment is downstream of the outlet manifold layer 4b, and the inner cavity of the second branch stream segment is upstream of the outlet manifold layer 4b. A working fluid outlet 42 is provided at one end of the second main stream segment. The second main stream segment is strip-shaped as a whole, and one end of the second main stream segment close to the working fluid outlet 42 is bent forward, and the second branch stream segment is perpendicular to the second main stream segment. The first main stream segment of the inlet manifold layer 4a and the second main stream segment of the outlet manifold layer 4b are interlaced with each other.

[0045] An inlet weir 43 is arranged upstream of the inlet manifold layer 4a, and the inlet weir 43 is perpendicular to the flow direction of the heat exchange medium, so that the heat exchange medium entering the inlet manifold layer 4a flows over the inlet weir 43 with the same height of the liquid level, and the heat exchange medium can flow into the battery gap below in equal amounts and evenly at intervals. Multiple rows of jet holes 44 are arranged below the inlet manifold layer 4a; multiple rows of outflow holes 45 are arranged below the outlet manifold layer 4b, and the jet holes 44 and the outflow holes 45 are staggered with each other. The jet holes 44 are located on the bottom wall of the first tributary section, and the outflow holes 45 are located on the bottom wall of the second tributary section.

[0046] The above structure enables adjacent jet holes 44 and outlet holes 45 to be interlaced with two adjacent battery gaps near the same battery 3. That is, the heat exchange medium enters the battery gaps between the batteries 3 from the inlet manifold layer 4a in an intermittent manner, turns back through the micro-channel bottom plate 2, and then passes through the adjacent battery gaps of the battery 3 and the outlet manifold layer 4b to be discharged in sequence. This design prolongs the contact time of each heat exchange medium with a single battery 3, thereby increasing the heat exchange amount between the heat exchange medium and the battery 3.

[0047] The number of the jet holes 44 and the outlet holes 45 in each row is 1-20; the condition to be satisfied is that the total flow cross-sectional area of ​​the jet holes 44 in each row is smaller than the total flow cross-sectional area of ​​the outlet holes 45 in each row, so as to form a turbulent flow with a higher speed in the area below the inlet manifold layer 4a, so as to improve the convective heat transfer coefficient between the heat exchange medium and the surface of the battery 3, thereby improving the heat exchange amount between the heat exchange medium and the battery 3.

[0048] In addition, if Figure 4 As shown, an outlet weir 46 is provided downstream of the outlet manifold layer 4b, and the outlet weir 46 is perpendicular to the flow direction of the heat exchange medium, so that the flow of each second straight pipe section of the outlet manifold layer 4b is stable and balanced, which helps to improve the temperature uniformity of the battery 3. The heat dissipation medium upstream of the inlet manifold layer 4a flows to the downstream of the inlet manifold layer 4a after passing through the area above the inlet weir 43; the heat dissipation medium downstream of the outlet manifold layer 4b flows to the medium outlet 42 of the outlet manifold layer 4b after passing through the area above the outlet weir 46.

[0049] The micro-channel bottom plate 2 is composed of a lower plate body and a plurality of fins 21 formed by protruding upward from the top of the lower plate body. The thickness of the fins 21 of the micro-channel bottom plate 2 is 2-4 mm, and the fin gap between adjacent fins 21 is 2-5 mm. In addition, limiting grooves 22 corresponding to the batteries 3 are set on the fins 21 of the micro-channel bottom plate 2, so as to place and fix the batteries 3 at equal intervals, and the battery gap between the batteries 3 is 2-5 mm.

[0050] like Figure 6 As shown, a plurality of rows of limiting grooves 22 are formed on the micro-channel bottom plate 2. Figure 6A row of limiting grooves 22 in the quadrangular prism space surrounded by the dotted lines in the figure can fix one battery 3, and multiple batteries 3 can be fixed on the micro-channel bottom plate 2 through multiple rows of limiting grooves 22. Comb-shaped micro-channels are formed between adjacent fins 21, and the top of the micro-channel is connected to the battery gaps formed between the batteries 3.

[0051] Example 2

[0052] like Figure 7-11 As shown, this embodiment relates to another manifold immersed jet battery thermal management module, which includes a battery box 1, a microchannel bottom plate 2 and a battery 3 that are substantially the same as those in Example 1. The main difference between this embodiment and Example 1 is that the structural design of the inlet and outlet manifold layer 4 is different. The structure of the inlet and outlet manifold layer 4 of this embodiment is as follows:

[0053] The inlet and outlet manifold layer 4 is composed of an inlet manifold layer 4a and an outlet manifold layer 4b, which together form an upper and lower through-type structure. The inlet manifold layer 4a is roughly rectangular, and the outlet manifold layer 4b is also roughly rectangular. A through pipe 44a is provided at the bottom of the inlet manifold layer 4a to penetrate the outlet manifold layer 4b.

[0054] The inlet manifold layer 4a is composed of a first external section and a first internal section. The inner cavity of the first external section is the upstream of the inlet manifold layer 4a, and the inner cavity of the first internal section is the downstream of the inlet manifold layer 4a. The first internal section is arranged directly above the battery box 1, and the first external section is arranged on one side of the first internal section. A working medium inlet 41 is arranged in the middle of the first external section.

[0055] The outlet manifold layer 4b is composed of a second external section and a second internal section. The inner cavity of the second external section is downstream of the outlet manifold layer 4b, and the inner cavity of the second internal section is upstream of the outlet manifold layer 4b. The second internal section is arranged directly above the battery box 1, and the second external section is arranged on one side of the second internal section. A working fluid outlet 42 is arranged in the middle of the second external section. The outlet manifold layer 4b is located between the inlet manifold layer 4a and the battery box 1.

[0056] An inlet weir 43 is arranged upstream of the inlet manifold layer 4a, and the inlet weir 43 is perpendicular to the flow direction of the heat exchange medium, so that the heat exchange medium entering the inlet manifold layer 4a flows over the inlet weir 43 with the same height of the liquid level, and the heat exchange medium can flow into the battery gap below in equal and uniform intermittent amounts. A plurality of rows of jet holes 44 are arranged below the inlet manifold layer 4a, and a through-tube 44a is formed on the bottom wall of the inlet manifold layer 4a extending downward along the jet holes 44, and adjacent through-tubes 44a and outflow holes 45 are respectively staggered and communicated with two adjacent battery gaps near the same battery 3. The jet holes 44 are located on the bottom wall of the first inner connecting section, and the outflow holes 45 are located on the bottom wall of the second inner connecting section.

[0057] The number of through-tubes 44 a in each row is also 1-20; the same condition needs to be satisfied that the total flow cross-sectional area of ​​the through-tubes 44 a in each row is smaller than the total flow cross-sectional area of ​​the outflow holes 45 in each row.

[0058] The working process of the heat dissipation medium is as follows:

[0059] The heat dissipating medium flows into the inlet manifold layer 4a of the inlet and outlet manifold layer 4 from the medium inlet 41 on one side of the battery box 1. After flowing over the inlet weir 43, the heat dissipating medium is sprayed into the battery gaps below each other in equal amounts and evenly at intervals through multiple rows of jet holes 44, passing over the side walls of the battery 3 and absorbing the heat of the battery 3, then flowing through the micro-channel 21 of the micro-channel bottom plate 2 and turning upward, flushing the other side of the battery 3 again and absorbing the heat of the battery 3, thereby achieving heat dissipation management of the battery 3; and finally being discharged from the medium outlet 42 of the outlet manifold layer 4b.

[0060] It should be noted that the heat dissipation medium is a low-temperature liquid cooling medium. In Example 1, the heat dissipation medium overflowing the inlet weir 43 flows through the jet hole 44 and is directly sprayed into the battery gap below; in Example 2, the heat dissipation medium overflowing the inlet weir 43 flows downward from the jet hole 44 through the through pipe 44a and is then sprayed into the battery gap below.

[0061] The heat dissipation performance is verified as follows:

[0062] In order to compare the superiority of the battery thermal management system of the present invention, this specific embodiment provides a numerical calculation comparison of a conventional immersion battery thermal management system. The overall structure of the conventional immersion battery thermal management system can be found in Figure 1 .

[0063] Under the same calculation conditions such as 3 times discharge rate, equal heat dissipation fluid inlet flow rate, and the same cylindrical battery heat generation, numerical simulation calculations were performed on three immersion modules: the conventional immersion structure design scheme, the staggered structure design scheme of the same horizontal layer in the first embodiment, and the upper and lower through-type structure design scheme of the upper and lower layers in the second embodiment. The temperature cloud diagrams of the batteries in the modules under different structure schemes at the end of discharge were calculated as follows: Fig.12 shown.

[0064] from Fig.12It can be seen that the temperature cloud maps of the batteries in the module under the three same structural schemes are quite different. From the maximum and minimum temperatures of the battery pack marked on each temperature cloud map, it can be seen that the minimum temperature of the battery at the end of the discharge at a 3x discharge rate in the conventional immersion structure scheme is 27.9°C, and the maximum temperature is 31.3°C, that is, the maximum temperature difference is 3.4°C; the minimum temperature of the horizontal single manifold layer inlet scheme of this embodiment 1 is 28.1°C, the maximum temperature is 29.6°C, and the maximum temperature difference is 1.5°C; the minimum temperature of the horizontal single manifold layer inlet scheme of this embodiment 1 is 28.2°C, the maximum temperature is 29.8°C, and the maximum temperature difference is 1.6°C. Obviously, both schemes of the present invention can significantly improve the cooling capacity of the coolant on the battery, so that the maximum temperature of the battery is further reduced, and at the same time significantly improve the temperature uniformity of the battery pack.

[0065] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A manifold immersed jet battery thermal management module, comprising a battery box, characterized in that: A micro-channel bottom plate is provided on the bottom wall of the battery box, a plurality of batteries are provided on the micro-channel bottom plate, a battery gap is formed between the battery box and the plurality of batteries, a manifold layer for conveying heat dissipation medium is provided on the top of the battery box, and the manifold layer is divided into an inlet manifold layer and an outlet manifold layer; The inlet manifold layer is provided with a working medium inlet, the outlet manifold layer is provided with a working medium outlet, the bottom of the inlet manifold layer is provided with a plurality of rows of jet holes, the bottom of the outlet manifold layer is provided with a plurality of rows of outlet holes staggered with the jet holes, the heat dissipating working medium flows downward from the jet holes into the battery gap on one side of the battery, then turns back through the micro-channel bottom plate, flows upward into the battery gap on the other side of the battery, and reaches the outlet holes.

2. The manifold immersed jet battery thermal management module according to claim 1, characterized in that: A plurality of the batteries are linearly arranged at equal intervals on the microchannel bottom plate, and the inlet manifold layer and the outlet manifold layer are arranged in a staggered manner at the same horizontal layer; or arranged in an up-and-down through-arrangement of two layers.

3. The manifold immersed jet battery thermal management module according to claim 1, characterized in that: The total flow cross-sectional area of ​​each jet hole is smaller than the total flow cross-sectional area of ​​each outlet hole.

4. The manifold immersed jet battery thermal management module according to claim 1, characterized in that: An inlet weir is disposed upstream of the inlet manifold layer, and an outlet weir is disposed downstream of the outlet manifold layer.

5. The manifold immersed jet battery thermal management module according to claim 1, characterized in that: The inlet manifold layer and the outlet manifold layer are arranged in a staggered manner with each other in the same horizontal layer; The inlet manifold layer is composed of a first main stream segment and a plurality of first branch stream segments, the inner cavity of the first main stream segment is the upstream of the inlet manifold layer, and the inner cavity of the first branch stream segment is the downstream of the inlet manifold layer; The outlet manifold layer consists of a second main stream segment and a plurality of second branch stream segments, the inner cavity of the second main stream segment is downstream of the outlet manifold layer, the inner cavity of the second branch stream segment is upstream of the outlet manifold layer, and the first main stream segment and the second main stream segment are interlaced.

6. The manifold immersed jet battery thermal management module according to claim 5, characterized in that: The working medium inlet is arranged at one end of the first main stream section, and the jet hole is arranged on the bottom wall of the first branch stream section; the working medium outlet is arranged at one end of the second main stream section, and the outlet hole is arranged on the bottom wall of the second branch stream section.

7. The manifold immersed jet battery thermal management module according to claim 1, characterized in that: The inlet manifold layer and the outlet manifold layer are arranged in two layers in an up-and-down penetrating manner, and the outlet manifold layer is located between the inlet manifold layer and the battery box; The inlet manifold layer is composed of a first external section and a first internal section, the inner cavity of the first external section is the upstream of the inlet manifold layer, and the inner cavity of the first internal section is the downstream of the inlet manifold layer; The outlet manifold layer is composed of a second external section and a second internal section, the inner cavity of the second external section is the downstream of the outlet manifold layer, and the inner cavity of the second internal section is the upstream of the outlet manifold layer.

8. The manifold immersed jet battery thermal management module according to claim 7, characterized in that: The working medium inlet is arranged in the middle of the first external section, the jet hole is arranged on the bottom wall of the first internal section, the bottom wall of the first internal section extends downward from the jet hole to form a through tube, and the through tube penetrates the second internal section; the working medium outlet is arranged in the middle of the second external section, and the outflow hole is arranged on the bottom wall of the second internal section.

9. The manifold immersed jet battery thermal management module according to claim 1, characterized in that: The micro-channel bottom plate is composed of a lower plate body and a plurality of fins formed by protruding upward from the top of the lower plate body, and micro-channels are formed between adjacent fins.

10. The manifold immersed jet battery thermal management module according to claim 9, characterized in that: The fins are provided with limiting grooves corresponding to the batteries one by one, the width of the battery gap is 2-5 mm, the thickness of the fins is 2-4 mm, and the width of the micro-channels is 2-5 mm.

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