Electrochemical energy storage thermal management system

Abstract

The utility model belongs to the field of electrochemical energy storage and provides an electrochemical energy storage heat management system which comprises an energy storage battery unit and a plurality of valves, the energy storage battery unit is provided with a liquid cooling component, a condenser is arranged on the heat exchange side of the liquid cooling component, and a water tower is arranged on the refrigerant supply side of the condenser. A compressor and a heat exchanger are arranged in the refrigerant circulating direction of the condenser, the heat exchanger is communicated with the condenser, the water tower and the liquid cooling component through pipelines, the heat exchanger comprises a refrigerant heat exchange cavity, a liquid cold heat exchange cavity and a surface cold heat exchange cavity which are sequentially distributed from top to bottom, and the refrigerant heat exchange cavity is communicated with the condenser and the compressor in a circulating mode. The surface cold-heat exchange cavity is circularly communicated with the water tower, and the liquid cold-heat exchange cavity is circularly communicated with the liquid cooling component. On the basis that refrigerating, heating and surface cooling heat exchange modes are achieved, pipeline investment is reduced, pipeline control difficulty is lowered, pipeline control efficiency can be improved easily, and the system is suitable for large-scale popularization.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electrochemical energy storage field, especially relate to a kind of electrochemical energy storage thermal management system. BACKGROUND

[0002] New energy storage can improve energy utilization efficiency, ensure energy supply safety, promote the development of renewable clean energy, optimize energy structure and support smart grid construction. As a new energy storage technology, electrochemical energy storage, especially lithium-ion batteries, will continue to improve performance in terms of low cost, long life and high safety in the future. High safety, high energy density solid-state batteries, lithium-sulfur batteries and lithium-air batteries have the potential for commercialization. The battery pack of electrochemical energy storage is composed of multiple battery modules in parallel, and each battery module is composed of multiple battery cells in series or parallel, which is the core of electrochemical energy storage system and is responsible for storing and releasing electrical energy. The battery thermal management system is used to monitor and adjust the temperature during the charging and discharging process of the battery pack.

[0003] The existing patent CN202223072722.7 discloses an electrochemical energy storage thermal management system, which includes a refrigeration / heat system, a water-water heat exchange system and a battery liquid cooling system. The multiple modes of the system can make the energy storage battery work in the required temperature range, while achieving the purpose of energy saving and environmental protection. However, the system requires an additional plate heat exchanger in the surface cooling heat exchange mode, and at least two pipelines are added in the pipeline control, which not only increases the cost, but also increases the difficulty of pipeline management and control. UTILITY MODEL CONTENT

[0004] The utility model provides a kind of electrochemical energy storage thermal management system for the technical problems existing in the above-mentioned electrochemical energy storage thermal management system, and the utility model provides a kind of electrochemical energy storage thermal management system with reasonable design, lower cost and is conducive to improving the efficiency of pipeline control.

[0005] To achieve the above purpose, the utility model adopts the technical scheme, and the utility model provides a kind of electrochemical energy storage thermal management system, which includes energy storage battery unit and several valves, the energy storage battery unit is provided with liquid cooling component, the heat exchange side of the liquid cooling component is provided with condenser, the refrigerant supply side of the condenser is provided with water tower, the refrigerant circulation direction of the condenser is provided with compressor and heat exchanger, the heat exchanger is communicated with condenser, water tower and liquid cooling component by pipeline, the heat exchanger includes three heat exchange working cavities distributed in sequence and is refrigerant heat exchange cavity, liquid cooling heat exchange cavity and surface cooling heat exchange cavity respectively, the refrigerant heat exchange cavity is circularly communicated with condenser and compressor, the surface cooling heat exchange cavity is circularly communicated with water tower, and the liquid cooling heat exchange cavity is circularly communicated with liquid cooling component.

[0006] As preferred, the first valve is arranged at the inlet of the refrigerant heat exchange cavity, the second valve is arranged at the inlet of the surface cooling heat exchange cavity, and the third valve is arranged at the inlet of the liquid cooling heat exchange cavity.

[0007] As preferred, the heat exchanger comprises a shell, two sealing end covers are arranged at two ends of the shell, two inner shells are arranged in the shell and symmetrically distributed and sealingly matched with the sealing end covers, a plurality of heat exchange concaves are arranged at opposite directions of the inner shells and uniformly distributed along the length directions of the heat exchange concaves, the heat exchange concaves are semicylindrical surfaces, and the liquid cooling heat exchange cavity is formed between opposite surfaces of the two inner shells.

[0008] As preferred, the two ends of the inner shell are provided with plug plates, and the plug plates are nested with the plug plates on the other inner shell.

[0009] As preferred, the liquid cooling heat exchange cavity is provided with a flow guide plate, a plurality of flow guide convexes are arranged on the upper and lower surfaces of the flow guide plate and protrude towards the heat exchange concaves, support sheets are arranged at two ends of the flow guide plate, the support sheets are connected with the plug plates, and a plurality of through holes are arranged on the support sheets.

[0010] As preferred, the liquid cooling component comprises water inlet and outlet pipes, and the water inlet and outlet pipes are staggered and arranged on the upper and lower sides of the flow guide plate.

[0011] As preferred, the sealing end cover comprises a cover body, the cover body is nested with the two ends of the shell, two pairs of positioning blocks are arranged on the two sides of the cover body, a plurality of screw holes are arranged on the positioning blocks, countersunk screws for connecting the sealing end cover with the shell are arranged in the screw holes, a sealing convex is arranged on the inner end surface of the cover body and nested with the two ends of the inner shell, a cross-shaped reinforcing rib is arranged on the outer end surface of the cover body, and a sealing gasket is arranged on the inner wall of the cover body.

[0012] Compared with the prior art, the electric chemical energy storage heat management system has the advantages and positive effects that:

[0013] The electric chemical energy storage heat management system has the advantages that: the six connecting ports of the heat exchanger are used to connect the refrigerant, water and liquid cooling circulation paths, the pipeline investment is reduced, the difficulty of pipeline control is reduced, the device has reasonable design, simple structure, low cost and high pipeline control efficiency, and is suitable for large-scale promotion. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0015] Figure 1 A structural schematic diagram of an electrochemical energy storage thermal management system provided for the embodiment is shown in the figure.

[0016] Figure 2 A cross-sectional view of a heat exchanger provided for the embodiment is shown in the figure.

[0017] Figure 3 An axonometric view of a sealing end cover and a sealing gasket provided for the embodiment is shown in the figure.

[0018] Figure 4 An axonometric view of a sealing end cover provided for the embodiment is shown in the figure.

[0019] Figure 5 A front view of another sealing end cover provided for the embodiment is shown in the figure.

[0020] In the above figures, 1, energy storage battery unit; 2, valve; 21, first valve; 22, second valve; 23, third valve; 3, liquid cooling component; 31, water inlet; 32, water outlet; 4, condenser; 5, water tower; 6, compressor; 7, heat exchanger; 71, refrigerant heat exchange cavity; 72, liquid cooling heat exchange cavity; 73, surface cooling heat exchange cavity; 74, outer shell; 75, sealing end cover; 751, cover body; 752, positioning block; 753, screw hole; 754, sealing protrusion; 755, cross reinforcing rib; 76, inner shell; 761, heat exchange concave surface; 762, plug plate; 77, flow guide plate; 771, flow guide convex surface; 772, support sheet; 78, sealing gasket. DETAILED DESCRIPTION

[0021] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0022] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, however, the present application can also be implemented in other ways different from those described herein, therefore, the present application is not limited to the specific embodiments disclosed in the following description.

[0023] Embodiments, such as Figures 1-5 As shown in the embodiment, the heat exchanger 7 includes three heat exchange working cavities distributed in sequence from top to bottom, and the three heat exchange working cavities are respectively a refrigerant heat exchange cavity 71, a liquid cooling heat exchange cavity 72 and a surface cooling heat exchange cavity 73. The refrigerant heat exchange cavity 71 is in circulation communication with the condenser 4 and the compressor 6, the surface cooling heat exchange cavity 73 is in circulation communication with the water tower 5, and the liquid cooling heat exchange cavity 72 is in circulation communication with the liquid cooling component 3. In the refrigeration mode and the heating mode, the refrigerant can exchange heat with the heat transfer medium in the refrigerant heat exchange cavity 71 and the liquid cooling heat exchange cavity 72, and in the surface cooling heat exchange mode, the water can exchange heat with the heat transfer medium in the surface cooling heat exchange cavity 73 and the liquid cooling heat exchange cavity 72. In this way, the six connection ports of the heat exchanger 7 are provided to connect the circulation paths of the refrigerant, the water and the liquid cooling, and on the basis of realizing the refrigeration, the heating and the surface cooling heat exchange mode, the pipeline investment is reduced, the difficulty of pipeline control is reduced, and the pipeline control efficiency is improved.

[0024] On this basis, the heat exchanger 7 provided by the utility model includes three heat exchange working cavities distributed in sequence from top to bottom and respectively is refrigerant heat exchange cavity 71, liquid cooling heat exchange cavity 72 and surface cooling heat exchange cavity 73, refrigerant heat exchange cavity 71 and condenser 4, compressor 6 circulation communication, surface cooling heat exchange cavity 73 and water tower 5 circulation communication, liquid cooling heat exchange cavity 72 and liquid cooling component 3 circulation communication. In the refrigeration mode and the heating mode, the refrigerant can exchange heat with the heat transfer medium in the refrigerant heat exchange cavity 71 and the liquid cooling heat exchange cavity 72, and in the surface cooling heat exchange mode, the water can exchange heat with the heat transfer medium in the surface cooling heat exchange cavity 73 and the liquid cooling heat exchange cavity 72. In this way, the six connection ports of the heat exchanger 7 are provided to connect the circulation paths of the refrigerant, the water and the liquid cooling, and on the basis of realizing the refrigeration, the heating and the surface cooling heat exchange mode, the pipeline investment is reduced, the difficulty of pipeline control is reduced, and the pipeline control efficiency is improved.

[0025] Further, the utility model is provided with first valve 21 in the import direction of refrigerant heat exchange cavity 71, second valve 22 is provided with in the import direction of surface cooling heat exchange cavity 73, and third valve 23 is provided with in the import direction of liquid cooling heat exchange cavity. In the case of surface cooling heat exchange mode work, by controlling the first valve 21 can stop the refrigerant circulation in the refrigeration / heating mode, and in the case of refrigeration / heating mode work, by controlling the second valve 22 can stop the water circulation in the surface cooling heat exchange mode.

[0026] In order to improve the utilization of heat exchanger 7, the utility model provides the heat exchanger 7 includes the shell 74, and the both ends of shell 74 are provided with sealing end cap 75, the inside of shell 74 is provided with two symmetrical distribution and with the sealing cooperation of sealing end cap 75 inner shell 76, and the opposite direction of inner shell 76 is provided with a plurality of heat exchange concave surface 761 along its length direction even distribution, and heat exchange concave surface 761 is semicylindrical surface, and the opposite surface between two inner shell 76 forms liquid cooling heat exchange cavity 72, wherein, by adopting the design of heat exchange concave surface 761 can increase the contact area of circulating coolant in liquid cooling component 3 and the refrigerant and water in heat exchanger 7, obtains larger heat exchange working surface, is favorable to guarantee the working performance of thermal management system, furthermore, two inner shell 76 in the utility model keep independent from each other, and the end is sealed through sealing end cap 75, and it is favorable to guarantee the circulating working performance of different medium.

[0027] Further, the utility model is provided with the plugboard 762 at both ends of the inner shell 76, the plugboard 762 is nested with the plugboard 762 on the other inner shell 76, the interval of two plugboards 762 on one inner shell 76 is greater than the interval of the plugboard 762 on the other inner shell 76, can realize nesting, and the assembly interval of two inner shell 76 can be controlled through the nested plugboard 762 arranged in pairs, and it is favorable to improve the sealing property of whole heat exchanger 7.

[0028] In order to improve the heat exchange efficiency of medium of different temperature in heat exchanger 7, the utility model is provided with the flow guide plate 77 in the inside of liquid cooling heat exchange cavity 72, and the upper and lower surfaces of flow guide plate 77 are provided with a plurality of flow guide convex surfaces 771 in the direction of heat exchange concave surface 761, and the flow guide convex surface 771 is profiled with heat exchange concave surface 761 and keeps a certain gap, and the both ends of flow guide plate 77 are provided with support sheet 772, and support sheet 772 is connected with plugboard 762, and a plurality of through holes are arranged on support sheet 772. Through the setting of flow guide convex surface 771, on the one hand, heat exchange surface area is increased, and on the other hand, the cross-sectional flow of coolant in heat exchanger 7 can be controlled, and it is favorable to improve the heat exchange performance of coolant and working medium in heat exchanger 7.

[0029] In order to the heat exchange efficiency of coolant, the utility model provides liquid cooling component 3 includes water inlet 31 and water outlet 32, and water inlet 31 and water outlet 32 are staggered distribution about flow guide plate 77, and by controlling the distribution interval of water inlet 31 and water outlet 32 in space, the full flow of coolant in liquid cooling heat exchange cavity 72 is enabled, and it is favorable to carry out cold and heat exchange fully.

[0030] One of the two sealing end covers 75 is provided with four pipe openings corresponding to the circulating pipe opening and the water circulating pipe opening of the refrigerant, and the other sealing end cover 75 is provided with two pipe openings corresponding to the water inlet pipe opening 31 and the water outlet pipe opening 32. In order to improve the sealing performance of the sealing end cover 75 on both ends of the heat exchanger 7, the sealing end cover 75 comprises a cover body 751, the cover body 751 is nested with both ends of the shell 74, both sides of the cover body 751 are provided with two pairs of positioning blocks 752, a plurality of screw holes 753 are arranged on the positioning blocks 752, a countersunk screw for connecting the sealing end cover 75 and the shell 74 is arranged in the screw hole 753, the inner end face of the cover body 751 is provided with a sealing protrusion 754 nested with both ends of the inner shell 76, the outer end face of the cover body 751 is provided with a cross reinforcing rib 755, the inner wall of the cover body 751 is provided with a back-shaped sealing gasket 78, and the sealing gasket 78 is provided with a through hole corresponding to the screw hole 753. The nested mode, the sealing protrusion 754 and the sealing gasket 78 can effectively improve the sealing performance of the sealing end cover 75 and the heat exchanger 7, and the plurality of countersunk screws can ensure the connection reliability of the sealing end cover 75 and the heat exchanger 7, so as to improve the actual working performance of the heat exchanger 7 in different modes.

[0031] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in other forms. Any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification of the above embodiments without departing from the technical scheme of the present application, according to the technical essence of the present application, still belongs to the protection scope of the present application.

Claims

1. An electrochemical energy storage thermal management system, comprising an energy storage battery pack and a plurality of valves, the energy storage battery pack being provided with a liquid cooling component, a heat exchange side of the liquid cooling component being provided with a condenser, a refrigerant supply side of the condenser being provided with a water tower, a refrigerant circulation direction of the condenser being provided with a compressor and a heat exchanger, characterized in that, The heat exchanger is communicated with the condenser, the water tower and the liquid cooling component through pipelines, and the heat exchanger comprises three heat exchange working cavities which are arranged in sequence from top to bottom and are respectively a refrigerant heat exchange cavity, a liquid cooling heat exchange cavity and a surface cooling heat exchange cavity.

2. An electrochemical energy storage thermal management system according to claim 1, wherein, A first valve is arranged at the inlet of the refrigerant heat exchange cavity, a second valve is arranged at the inlet of the surface cooling heat exchange cavity, and a third valve is arranged at the inlet of the liquid cooling heat exchange cavity.

3. An electrochemical energy storage thermal management system according to claim 2, wherein, The heat exchanger comprises an outer shell, two sealing end covers are arranged at the two ends of the outer shell, two inner shells which are symmetrically arranged and are in sealing cooperation with the sealing end covers are arranged in the outer shell, a plurality of heat exchange concaves which are uniformly arranged along the length direction of the inner shell are arranged at the opposite direction of the inner shell, the heat exchange concave is a semicylindrical surface, and the liquid cooling heat exchange cavity is formed between the opposite surfaces of the two inner shells.

4. An electrochemical energy storage thermal management system according to claim 3, wherein, Plug plates are arranged at the two ends of the inner shell, and the plug plates are in nested cooperation with the plug plates on the other inner shell.

5. An electrochemical energy storage thermal management system according to claim 4, wherein, A flow guide plate is arranged in the liquid cooling heat exchange cavity, a plurality of flow guide convexes which are protruded towards the heat exchange concave are arranged on the upper and lower surfaces of the flow guide plate, support sheets are arranged at the two ends of the flow guide plate, the support sheets are connected with the plug plates, and a plurality of through holes are arranged on the support sheets.

6. An electrochemical energy storage thermal management system according to claim 5, wherein, The liquid cooling component comprises a water inlet pipe and a water outlet pipe, and the water inlet pipe and the water outlet pipe are arranged in staggered distribution on the upper and lower surfaces of the flow guide plate.

7. An electrochemical energy storage thermal management system according to claim 3 or 6, wherein, The sealing end cover comprises a cover body which is nested with the two ends of the outer shell, two pairs of positioning blocks are arranged at the two sides of the cover body, a plurality of screw holes are arranged on the positioning blocks, countersunk screws which are used for connecting the sealing end cover and the outer shell are arranged in the screw holes, a sealing convex which is in nested cooperation with the two ends of the inner shell is arranged on the inner end surface of the cover body, a cross-shaped reinforcing rib is arranged on the outer end surface of the cover body, and a back-shaped sealing gasket is arranged on the inner wall of the cover body.

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