Energy-storage high-magnification immersed pack box body structure

Abstract

The invention discloses an energy storage high-magnification immersed pack box body structure, and relates to the technical field of energy storage heat management. Comprising a liquid cooling box body and a high-power battery cell arranged in the liquid cooling box body, the liquid cooling box body comprises a box body structure which is enclosed by a front side plate, a left side plate, a rear side plate, a right side plate and a bottom plate and has a top opening; the flow channels in the left side plate, the rear side plate and the right side plate are sequentially communicated, a first water outlet is formed in the end, close to one side of the front side plate, of the right side plate, a first water inlet is formed in the end, close to one side of the front side plate, of the left side plate, a flow channel is formed in the bottom plate, and a partition plate is arranged in the flow channel and divides the flow channel in the bottom plate into two parts. The two flow channels are arranged on one side of the rear side plate in a communicating mode, a second water inlet and a second water outlet are formed in the end, close to the front side plate, of the bottom plate, and the second water inlet and the second water outlet are each communicated with one flow channel. Immersion liquid is arranged in the liquid cooling box body, and the high-power battery cell is immersed in the immersion liquid.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage thermal management, in particular to a high-rate immersed pack box structure for energy storage. BACKGROUND

[0002] In the field of energy storage pack thermal management, in order to ensure that the battery is in a suitable working temperature range, it needs to be cooled at high temperature and heated at low temperature.

[0003] In order to maintain the safe operation of the battery module with high efficiency and long cycle life, the current common cooling methods for energy storage batteries are mainly air cooling and liquid cooling. The air cooling system has low heat exchange efficiency and uneven temperature, and is mainly applied to devices with low energy density. The liquid cooling plate is only a heat dissipation cold plate at the bottom, and the battery cell only contacts the cold plate at the bottom for heat dissipation. The cooling liquid circulates the heat of the battery at the bottom of the liquid cooling plate. At present, liquid cooling is the mainstream development and application direction. However, the operating battery rate is low, which cannot meet the heat dissipation demand of high-rate battery cells. SUMMARY

[0004] Therefore, the present application provides a high-rate immersed pack box structure for energy storage to solve the above technical problems.

[0005] In order to achieve the above purpose, the present application provides the following technical scheme:

[0006] A high-rate immersed pack box structure for energy storage includes a liquid cooling box and a high-power battery cell arranged inside the liquid cooling box.

[0007] The liquid cooling box includes a top-open box structure surrounded by a front side plate, a left side plate, a rear side plate, a right side plate, and a bottom plate.

[0008] The left side plate, the rear side plate, and the right side plate are provided with flow channels inside, and the flow channels inside the left side plate, the rear side plate, and the right side plate are sequentially connected. The end of the right side plate close to the front side plate is provided with a first water outlet, and the first water outlet is connected with the flow channel inside the right side plate. The end of the left side plate close to the front side plate is provided with a first water inlet, and the first water inlet is connected with the flow channel inside the left side plate.

[0009] The bottom plate is provided with a flow channel inside, and a partition plate is arranged in the flow channel. The partition plate divides the flow channel inside the bottom plate into two parts, and the end of the partition plate close to the rear side plate is spaced apart from the bottom plate. The two flow channels are connected at the side of the rear side plate. The end of the bottom plate close to the front side plate is provided with a second water inlet and a second water outlet, and the second water inlet and the second water outlet are connected with one flow channel respectively.

[0010] The liquid cooling box is internally provided with immersion liquid, and the high-power battery cell is immersed in the immersion liquid.

[0011] Optionally, the high-power battery cell is arranged in two pieces along the front-rear direction of the liquid cooling box, and a flow guide plate is arranged between the two pieces of high-power battery cell, the flow guide plate is internally provided with a flow channel, and the two ends of the flow guide plate are fixedly connected with the left side plate and the right side plate, and the two ends of the internal flow channel of the flow guide plate are in communication with the internal flow channels of the left side plate and the right side plate.

[0012] Optionally, the bottom end of the left side plate and the bottom end of the right side plate are bent towards the center of the box and extended to be provided with a left bottom plate and a right bottom plate.

[0013] The left bottom plate is integrally formed with the left side plate, and the internal flow channel of the left bottom plate is in communication with the internal flow channel of the left side plate.

[0014] The right bottom plate is integrally formed with the right side plate, and the internal flow channel of the right bottom plate is in communication with the internal flow channel of the right side plate.

[0015] Optionally, the first water inlet is arranged at one end of the left side plate close to the top, and the first water outlet is arranged at one end of the right side plate close to the bottom.

[0016] Optionally, the flow channel in the left side plate is provided with a plurality of flow channels, and the plurality of flow channels are in communication with each other.

[0017] The flow channel in the right side plate is provided with a plurality of flow channels, and the plurality of flow channels are in communication with each other.

[0018] The flow channel in the rear side plate is provided with a plurality of flow channels, and the plurality of flow channels are in communication.

[0019] Optionally, the flow channel in the bottom plate is divided into a left flow channel and a right flow channel, the left flow channel is connected with the water inlet, the right flow channel is connected with the water outlet, and the left flow channel and the right flow channel are in communication on the side away from the water inlet and the water outlet.

[0020] The left flow channel is provided with a plurality of left flow channels, and the plurality of left flow channels are in communication with each other; and the right flow channel is provided with a plurality of right flow channels, and the plurality of right flow channels are in communication with each other.

[0021] Optionally, the immersion liquid is a carbon-hydrogen synthetic hydrocarbon immersion liquid.

[0022] Optionally, the internal flow channel of the flow guide plate is provided with a plurality of flow channels, and the plurality of flow channels are in communication with each other.

[0023] The present application has at least the following beneficial effects:

[0024] The application sets up the circulating flow channel surrounded by the left side plate, the back side plate and the right side plate, cooperates with the flow channel inside the bottom plate, takes away the heat of the battery cell in the immersion liquid, and under the driving of the temperature difference of the circulating liquid in the box, the immersion liquid forms the flow around in the box, circulates and radiates heat inside, finally under the condition of the heat radiation on four sides, reduces the temperature difference of the battery cell operation. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the prior art and the present application, the drawings needed to be used in the description of the prior art and the embodiments of the present application will be briefly introduced below. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other drawings can be derived from the provided drawings without creative labor.

[0026] The structures, proportions, sizes, etc. shown in the specification are only used to cooperate with the content disclosed in the specification, for understanding and reading by those skilled in the art, and are not used to limit the limiting conditions of the implementation of the present application. Any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0027] Figure 1 The first perspective structural schematic diagram of an embodiment of the present application;

[0028] Figure 2 The first perspective exploded (immersion liquid) structural schematic diagram of an embodiment of the present application;

[0029] Figure 3 The second perspective structural schematic diagram of an embodiment of the present application;

[0030] Figure 4 The third perspective structural schematic diagram of an embodiment of the present application;

[0031] Figure 5 The structural schematic diagram of the A-A part in the middle of the present application; Figure 4

[0032] The structural schematic diagram of the B-B part in the middle of the present application; Figure 6 Figure 4 The structural schematic diagram of the C-C part in the middle of the present application;

[0033] Figure 7 Figure 4 The fourth perspective structural schematic diagram of an embodiment of the present application;

[0034] Figure 8 The structural schematic diagram of the A-A part in the middle of the present application;

[0035] Figure 9 The structural schematic diagram of the B-B part in the middle of the present application; Figure 8 ​​Fig. 2 is a schematic view of a cross-sectional structure of the D-D portion.

[0036] Explanation of reference signs:

[0037] 1, high-power battery cell; 2, liquid-cooled box body; 21, front side plate; 22, left side plate; 23, rear side plate; 24, right side plate; 25, bottom plate; 3, first water outlet; 4, first water inlet; 5, partition plate; 6, second water inlet; 7, second water outlet; 8, immersion liquid; 9, flow guide plate. DETAILED DESCRIPTION

[0038] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0039] In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified. The terms "first", "second", "third", "fourth" and the like (if any) in the specification and claims of the present application and the above-mentioned drawings are intended to distinguish the objects referred to. For the scheme with time sequence flow, such a term expression manner does not have to be understood as describing a specific order or sequence, and for the scheme of device structure, there is no distinction of importance, positional relationship, etc.

[0040] In addition, the terms "include", "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to only those steps or units explicitly listed, but can also include other steps or units inherent to the process, method, product or device, or steps or units added based on further optimization of the inventive concept.

[0041] As Figures 1-9 shown, an energy storage high-rate immersion pack box structure disclosed by the present application includes a liquid-cooled box body 2 and a high-power battery cell 1 arranged inside the liquid-cooled box body 2.

[0042] The liquid-cooled box body 2 includes a top-open box structure surrounded by a front side plate 21, a left side plate 22, a rear side plate 23, a right side plate 24 and a bottom plate 25.

[0043] The left side plate 22, the rear side plate 23 and the right side plate 24 are internally provided with flow channels, and the flow channels in the left side plate 22, the rear side plate 23 and the right side plate 24 are sequentially communicated; the end of the right side plate 24 close to the front side plate 21 is provided with a first water outlet 3, which is communicated with the internal flow channel of the right side plate 24; the end of the left side plate 22 close to the front side plate 21 is provided with a first water inlet 4, which is communicated with the internal flow channel of the left side plate 22.

[0044] The bottom plate 25 is internally provided with flow channels, and a partition plate 5 is arranged in the flow channels, which divides the flow channels in the bottom plate 25 into two, and the end of the partition plate 5 close to the rear side plate 23 is spaced apart from the bottom plate 25, and the two flow channels are communicated at the side of the rear side plate 23; the end of the bottom plate 25 close to the front side plate 21 is provided with a second water inlet 6 and a second water outlet 7, and each of the second water inlet 6 and the second water outlet 7 is communicated with one flow channel.

[0045] The liquid cooling box 2 is internally provided with an immersion liquid 8, and the high-power battery cell 1 is immersed in the immersion liquid 8.

[0046] In the embodiment, the left side plate 22, the right side plate 24 and the rear side plate 23 are integrally formed, and cavities and flow channels are arranged in the plate bodies of the three plates, and the left side plate 22, the rear side plate 23 and the right side plate 24 form communicated flow channels, and the circulation flow channels are formed at the periphery of the battery cell; the bottom plate 25 is also internally provided with circulation flow channels, and the double flow channels are circularly arranged at the periphery and the bottom, thereby cooling the battery cell.

[0047] The liquid cooling box 2 is internally provided with an immersion liquid 8, and the high-power battery cell 1 is immersed in the immersion liquid 8.

[0048] The first water inlet 4 is arranged at the front end of the left side plate 22, and is used for introducing the liquid cooling medium, which flows along the flow channel of the left side plate 22 towards the rear side plate 23 after entering the left side plate 22, enters the flow channel of the rear side plate 23, flows along the flow channel of the rear side plate 23 towards the right side plate 24, flows along the flow channel of the right side plate 24 towards the front side plate 21, and is finally discharged from the first water outlet 3 at the front end of the right side plate 24 for circulation.

[0049] The bottom plate 25 is internally provided with flow channels, and a partition plate 5 is arranged in the flow channels, which divides the flow channels in the bottom plate 25 into two, and the end of the partition plate 5 close to the rear side plate 23 is spaced apart from the bottom plate 25, and the two flow channels are communicated at the side of the rear side plate 23; the end of the bottom plate 25 close to the front side plate 21 is provided with a second water inlet 6 and a second water outlet 7, and each of the second water inlet 6 and the second water outlet 7 is communicated with one flow channel.

[0050] In a specific embodiment, the immersion liquid 8 is a hydrocarbon with good insulation performance, such as a hydrocarbon immersion liquid 8.

[0051] In a further embodiment, the high-power battery cell 1 is provided with two blocks along the front-rear direction of the liquid cooling box 2, and a flow guide plate 9 is provided between the two high-power battery cells 1, the flow guide plate 9 is internally provided with a flow channel, and the two ends of the flow guide plate 9 are fixedly connected with the left side plate 22 and the right side plate 24 respectively, and the internal flow channels of the left side plate 22 and the right side plate 24 are communicated at both ends of the internal flow channel of the flow guide plate 9.

[0052] The above-mentioned high-power battery cell 1 is provided with two blocks, the flow guide plate 9 is arranged between the two battery cells, and the flow guide plate 9 is communicated with the flow channels of the left side plate 22 and the right side plate 24 through the internal flow channel, thereby forming a heat dissipation cycle between the two battery cells.

[0053] It should be noted that the number of high-power battery cells 1 is not limited to two, and multiple battery cells and corresponding flow guide plates 9 can be provided for heat dissipation.

[0054] In a further specific embodiment, the bottom end of the left side plate 22 and the bottom end of the right side plate 24 are bent towards the center of the box and extended to be provided with a left bottom plate 25 and a right bottom plate 25;

[0055] The left bottom plate 25 is integrally formed with the left side plate 22, and the internal flow channel of the left bottom plate 25 is in communication with the internal flow channel of the left side plate 22;

[0056] The right bottom plate 25 is integrally formed with the right side plate 24, and the internal flow channel of the right bottom plate 25 is in communication with the internal flow channel of the right side plate 24.

[0057] The first water inlet 4 is arranged at one end of the left side plate 22 close to the top, and the first water outlet 3 is arranged at one end of the right side plate 24 close to the bottom.

[0058] The above-mentioned left side plate 22 and right side plate 24 are arranged in a structure in which the bottom plate 25 is extended, so that the fixed connection between the left side plate 22 and the right side plate 24 and the bottom plate 25 can be welded and fixed by machine stirring friction welding.

[0059] The flow channel in the left side plate 22 is provided with multiple flow channels, and the multiple flow channels are in communication with each other;

[0060] The flow channel in the right side plate 24 is provided with multiple flow channels, and the multiple flow channels are in communication with each other;

[0061] The flow channel in the rear side plate 23 is provided with multiple flow channels, and the multiple flow channels are in communication.

[0062] The above-mentioned left side plate 22, right side plate 24 and rear side plate 23 are all arranged in a multi-flow channel structure, which can make the cooling liquid uniformly distributed on the entire liquid cooling plate, improve the overall heat dissipation efficiency, and can share the cooling liquid flow, thereby reducing the flow rate of a single flow channel.

[0063] The flow channel in the bottom plate 25 is divided into a left flow channel and a right flow channel, the left flow channel is connected to the water inlet, the right flow channel is connected to the water outlet, and the left flow channel and the right flow channel are communicated at the side away from the water inlet and the water outlet;

[0064] The left flow channel is provided with a plurality of left flow channels, and the plurality of left flow channels are communicated with each other; the right flow channel is provided with a plurality of right flow channels, and the plurality of right flow channels are communicated with each other.

[0065] The flow channel in the bottom plate 25 is divided into two sides by the partition plate 5, the flow channels on the two sides are separated at the side close to the front side plate 21 and are communicated at the side close to the rear side plate 23, so that the cooling liquid enters the left flow channel through the second water inlet 6, flows to the rear side plate 23 along the left flow channel, then flows to the right flow channel at the tail end of the bottom plate 25, and finally flows to the front side plate 21 along the right flow channel and is discharged from the second water outlet 7.

[0066] The bottom plate 25 is used as a bottom circulation and directly contacts the high-power battery cell 1 to perform heat dissipation.

[0067] The internal flow channel of the flow guide plate 9 is provided with a plurality of flow channels, and the plurality of flow channels are communicated with each other.

[0068] The flow channel in the flow guide plate 9 is provided with a plurality of flow channels, and the flow channels are communicated with the left side plate 22 and the right side plate 24 to form a circulation between the high-power battery cell 1 and perform heat dissipation.

[0069] The flow guide plate 9 is further provided with two circulations around the flow guide plate 9, the first circulation is achieved by the flow guide plate 9, and the second circulation is a large circulation of the box body and flows along the left side plate 22, the rear side plate 23 and the right side plate 24.

[0070] The present application adopts the submerged non-flowing soaking battery cell, the box body enhances the heat dissipation double-flow channel scheme, effectively solves the problem that the high-rate battery cell is high in heat and cannot be cooled in time, the immersion heat dissipation structure has high heat dissipation capacity and high safety performance, the battery cell problems are more uniform, and the problem of low temperature at the top of the traditional heat dissipation bottom is avoided.

[0071] By adopting the immersion type and double-flow channel circulation heat exchange mode, the discharge rate of the pack of the high-capacity large battery cell is adjusted from 0.5P to 1P, and the pack with high discharge rate required by the frequency modulation project can be successfully landed. Due to the improvement of the heat management heat exchange mode, the temperature rise and temperature difference of the pack, and the temperature uniformity of the single battery cell are improved, and the cycle life of the pack is increased. With the improvement of the direct cooling technology, higher-rate battery cells can be cooled.

[0072] The core of the present application is:

[0073] 1. The double-flow channel, four-around heat dissipation and bottom heat dissipation structure is to form the flow around the internal immersion liquid 8, increase the heat dissipation of the battery cell. The immersion liquid 8 in the box flows around, increases the heat exchange capacity with the surrounding.

[0074] 2. The integrated extruded profile box adopts double-flow channel parallel connection, reduces the internal pipeline, reduces the risk of leakage. This heat dissipation scheme can be applied to high-frequency modulation application scenarios, and the solution for high heat dissipation demand of high-frequency modulation.

[0075] The above several specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in some embodiments.

[0076] The technical features of the above embodiments can be combined arbitrarily (as long as the combination of the technical features does not exist contradictory), in order to make the description simple, not all possible combinations of the technical features in the above embodiments are described; these embodiments not explicitly written should also be considered as the scope of the present application.

[0077] The above is a more specific and detailed description of the present application through general description and specific embodiments. It should be noted that without departing from the concept of the present application, it is obvious that the specific embodiments can be deformed and improved, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. A high-rate immersion pack housing structure for energy storage, characterized in that: Includes a liquid-cooled housing and high-power battery cells housed inside the liquid-cooled housing; The liquid-cooled box includes a box structure with a top opening, formed by a front side plate, a left side plate, a rear side plate, a right side plate, and a bottom plate. The left side plate, rear side plate and right side plate are provided with flow channels, and the flow channels inside the left side plate, rear side plate and right side plate are connected in sequence. The right side plate is provided with a first water outlet at the end near the front side plate, and the first water outlet is connected to the internal flow channel of the right side plate. The left side plate is provided with a first water inlet at the end near the front side plate, and the first water inlet is connected to the internal flow channel of the left side plate. The bottom plate has a flow channel inside, and a partition is provided inside the flow channel. The partition divides the flow channel inside the bottom plate into two, and the end of the partition near the rear side plate is spaced apart from the bottom plate. The two flow channels are connected on one side of the rear side plate. The bottom plate has a second water inlet and a second water outlet at the end near the front side plate. The second water inlet and the second water outlet are each connected to a flow channel. The liquid-cooled box is filled with an immersion liquid, and the high-power battery cell is immersed in the immersion liquid.

2. The high-rate immersion pack housing structure according to claim 1, characterized in that: Two high-power battery cells are arranged along the front-rear direction of the liquid-cooled box. A guide plate is arranged between the two high-power battery cells. The guide plate has a flow channel inside, and the two ends of the guide plate are fixedly connected to the left side plate and the right side plate, respectively. The two ends of the internal flow channel of the guide plate are connected to the internal flow channel of the left side plate and the internal flow channel of the right side plate, respectively.

3. The high-rate immersion pack housing structure according to claim 2, characterized in that: The bottom ends of the left and right side plates are bent towards the center of the box and extended to form a left bottom plate and a right bottom plate. The left bottom plate and the left side plate are integrally formed, and the internal flow channels of the left bottom plate and the internal flow channels of the left side plate are connected. The right bottom plate and the right side plate are integrally formed, and the internal flow channels of the right bottom plate and the internal flow channels of the right side plate are connected.

4. The high-rate immersion pack housing structure according to claim 1, characterized in that: The first water inlet is located at the top end of the left side plate, and the first water outlet is located at the bottom end of the right side plate.

5. The high-rate immersion pack housing structure according to claim 1, characterized in that: The left side plate has multiple flow channels, and these multiple flow channels are interconnected. The right side plate has multiple flow channels, and these multiple flow channels are interconnected. The rear side panel has multiple flow channels, and these multiple flow channels are interconnected.

6. The high-rate immersion pack housing structure according to claim 1, characterized in that: The flow channel inside the base plate is divided into a left flow channel and a right flow channel. The left flow channel is connected to the inlet, and the right flow channel is connected to the outlet. The left flow channel and the right flow channel are connected on the side away from the inlet and outlet. There are multiple left-side channels, and these channels are interconnected; there are also multiple right-side channels, and these channels are interconnected.

7. The high-rate immersion pack housing structure according to claim 1, characterized in that: The immersion solution is a hydrocarbon synthesis immersion solution.

8. The high-rate immersion pack housing structure according to claim 2, characterized in that: The guide plate has multiple internal flow channels, and these multiple flow channels are interconnected.

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