Electrochemical energy storage thermal management system

Abstract

The utility model discloses an electrochemical energy storage heat management system which comprises a refrigerating unit and a plurality of energy storage containers, the refrigerating unit is provided with a water inlet and a water outlet, the water inlet and the water outlet are respectively communicated with a first pipeline for circulation of a first cooling medium, and the refrigerating unit is used for adjusting the temperature of the first cooling medium; each energy storage container comprises an energy storage module and a heat exchanger, the energy storage modules and the heat exchangers communicate with second pipelines allowing second cooling media to circulate, and the heat exchangers communicate with the first pipelines so that the first cooling media flowing out along the water outlets can circulate to the water inlets after passing through the heat exchangers and are used for exchanging heat with the second cooling media passing through the heat exchangers. The multiple energy storage containers are managed in a centralized mode and share one refrigerating unit, the overall energy consumption of the system is greatly reduced, energy conservation and emission reduction are achieved, the management efficiency is improved, the cost can be greatly reduced, the occupied area is reduced, and the problems that the energy storage system is high in energy consumption and difficult to manage in a unified mode are solved through the arrangement.

Description

Technical Field

[0001] The utility model relates to the technical field of electrochemical energy storage, in particular to an electrochemical energy storage thermal management system. Background Art

[0002] At present, with the continuous improvement of my country's energy consumption structure, the electrochemical energy storage industry has shown explosive development, and the safety and stability of energy storage systems have attracted more and more attention. Electrochemical energy storage systems are currently roughly divided into two categories: immersion type and cold plate type. The energy storage system has the problem of heat generation during operation, especially in the process of high current charging and discharging, the heat generation phenomenon is more obvious. If this heat cannot be diffused in time, it will accumulate inside the battery, which will increase the rate of side reactions at the battery interface on the one hand, and excessive heat accumulation may cause thermal runaway of the battery on the other hand. Therefore, efficient heat dissipation measures are issues that must be considered in the energy storage system.

[0003] In order to improve the heat dissipation performance of the energy storage system, the submerged energy storage system that immerses the energy storage battery in a liquid medium has been rapidly developed. The submerged liquid-cooled battery pack in the prior art not only immerses the battery pack in an insulating coolant, but also improves the heat exchange efficiency by setting a flow channel between the battery packs inside the battery pack.

[0004] However, whether it is immersion type or cold plate type, most of the existing electrochemical energy storage thermal management systems are only for a single type or a single container, and cannot achieve centralized management of multiple containers; furthermore, most energy storage systems rely on their own contact with the heat transfer medium to dissipate heat, rather than relying on external heat dissipation devices for strong heat dissipation, resulting in poor heat dissipation effect; finally, the most significant disadvantage of distributed management is excessive energy consumption and high cost, which easily leads to energy waste.

[0005] Therefore, how to solve the problem of high energy consumption and difficulty in unified management of energy storage systems is a technical problem that technical personnel in this field currently need to solve. Utility Model Content

[0006] The utility model aims to provide an electrochemical energy storage thermal management system, which can solve the problems of high energy consumption and difficult unified management of the energy storage system.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] An electrochemical energy storage thermal management system, comprising:

[0009] A refrigeration unit is provided with a water inlet and a water outlet, the water inlet and the water outlet are respectively connected to a first pipeline for circulating a first cooling medium, and the refrigeration unit is used to adjust the temperature of the first cooling medium;

[0010] Multiple energy storage containers each include an energy storage module and a heat exchanger. The energy storage module and the heat exchanger are both connected to a second pipe for circulating a second cooling medium. The heat exchangers are all connected to the first pipe so that the first cooling medium flowing out along the water outlet flows to the water inlet after passing through the heat exchanger for exchanging heat with the second cooling medium passing through the heat exchanger.

[0011] Preferably, the first pipeline is provided with a cooling water pump, and the cooling water pump is used to circulate the first cooling medium to the refrigeration unit through the heat exchanger.

[0012] Preferably, a coolant pump is provided between the energy storage module and the heat exchanger so that the second cooling medium circulates along the energy storage module and the heat exchanger.

[0013] Preferably, the heat exchanger is provided with a first inlet, a first outlet, a first channel, a second inlet, a second outlet and a second channel, the first inlet and the first outlet are respectively used for the first cooling medium to flow into and out of the first channel, the second inlet and the second outlet are respectively used for the second cooling medium to flow into and out of the second channel, the first channel and the second channel are spaced apart, the first inlet and the second outlet are adjacent to each other, and the first outlet and the second inlet are adjacent to each other.

[0014] Preferably, a first temperature detector is provided between the first outlet and the water inlet, and a second temperature detector is provided between the second inlet and the energy storage module. The first temperature detector and the second temperature detector are used to detect the temperatures of the first cooling medium and the second cooling medium, respectively.

[0015] Preferably, the cooling water pump and the coolant pump are both provided with multifunctional valves, and the refrigeration unit, the first temperature detector, the second temperature detector, the cooling water pump and the coolant pump are all connected to the central control system for signal transmission, so that the central control system can adjust the refrigeration unit and the multifunctional valve in real time.

[0016] Preferably, the first pipeline and the second pipeline are also provided with flow meters to detect the flow rates of the first cooling medium and the second cooling medium.

[0017] Preferably, the energy storage module includes an immersion energy storage module and a cold plate energy storage module.

[0018] Preferably, the first channel and the second channel are both folded tubular structures.

[0019] Preferably, the first cooling medium is antifreeze cooling water.

[0020] With respect to the above-mentioned background technology, the electrochemical energy storage thermal management system provided by the present invention includes a refrigeration unit and multiple energy storage containers. The refrigeration unit is provided with a water inlet and a water outlet. The water inlet and the water outlet are respectively connected to a first pipe for circulating a first cooling medium. The refrigeration unit is used to adjust the temperature of the first cooling medium. The multiple energy storage containers all include an energy storage module and a heat exchanger. The energy storage module and the heat exchanger are both connected to a second pipe for circulating a second cooling medium. The heat exchangers are all connected to the first pipe so that the first cooling medium flowing out along the water outlet flows to the water inlet after passing through the heat exchanger, and is used to exchange heat with the second cooling medium passing through the heat exchanger.

[0021] Specifically, the refrigeration unit adjusts the temperature of the first cooling medium flowing through the first pipe, and the second cooling medium in the second pipe flows through the energy storage module, and is respectively connected to the first pipe and the second pipe through the heat exchanger, so that the first cooling medium can exchange heat with the second cooling medium for subsequent heat dissipation of the energy storage module. Multiple energy storage containers are centrally managed and share a refrigeration unit, which greatly reduces the overall energy consumption of the system, saves energy and reduces emissions, and improves management efficiency. Sharing a refrigeration unit can greatly reduce costs, especially for large-scale energy storage projects, reducing the footprint. Such an arrangement solves the problems of high energy consumption and difficult unified management of the energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0023] Figure 1 This is a schematic diagram of the structure of the electrochemical energy storage thermal management system provided in an embodiment of the utility model.

[0024] in:

[0025] 100-refrigeration unit, 110-first pipeline, 111-cooling water pump;

[0026] 200 - energy storage container, 211 - immersed energy storage module, 212 - cold plate energy storage module, 220 - heat exchanger, 230 - second pipeline, 231 - coolant pump. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0029] In the description of the present invention, it should be understood that the terms "up", "down", "in", "out", "inside" and "outside" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the positions or elements referred to must have specific directions, be constructed and operated in specific directions, and therefore should not be understood as limitations of the present invention.

[0030] The purpose of this utility model is to provide an electrochemical energy storage thermal management system that can solve the problems of high energy consumption and difficult unified management of energy storage systems. To achieve the above purpose, this utility model provides the following technical solutions:

[0031] See also Figure 1 This embodiment provides an electrochemical energy storage thermal management system, including a refrigeration unit 100 and a plurality of energy storage containers 200 .

[0032] The refrigeration unit 100 is provided with a water inlet and a water outlet, and the water inlet and the water outlet are respectively connected to a first pipe 110 for circulating a first cooling medium. The refrigeration unit 100 is used to adjust the temperature of the first cooling medium.

[0033] It is understandable that the first cooling medium circulates through the first pipe 110 and the refrigeration unit 100, wherein the refrigeration unit 100 has a certain storage space for accommodating the first cooling medium and adjusting the temperature thereof, and the refrigeration unit 100 can be further added according to actual needs.

[0034] Multiple energy storage containers 200 all include an energy storage module and a heat exchanger 220. The energy storage module and the heat exchanger 220 are both connected to a second pipe 230 for circulating a second cooling medium. The heat exchanger 220 is connected to the first pipe 110 so that the first cooling medium flowing out along the water outlet flows to the water inlet after passing through the heat exchanger 220, and is used to exchange heat with the second cooling medium passing through the heat exchanger 220.

[0035] It should be noted that the first pipe 110 and the second pipe 230 are preferably PVC pipes with circular cross-sections. The types and specifications of the first pipe 110 and the second pipe 230 can be adjusted according to actual conditions as long as the above-mentioned purpose can be achieved.

[0036] Specifically, the refrigeration unit 100 adjusts the temperature of the first cooling medium flowing through the first pipe 110, and the second cooling medium in the second pipe 230 flows through the energy storage module and is respectively connected to the first pipe 110 and the second pipe 230 through the heat exchanger 220, so that the first cooling medium can exchange heat with the second cooling medium for subsequent heat dissipation of the energy storage module. Multiple energy storage containers 200 are centrally managed and share one refrigeration unit 100, which greatly reduces the overall energy consumption of the system, saves energy and reduces emissions, and improves management efficiency. In addition, sharing one refrigeration unit 100 can greatly reduce costs, especially for large-scale energy storage projects, reducing the floor space. Such an arrangement solves the problems of high energy consumption and difficult unified management of the energy storage system.

[0037] Preferably, the first pipeline 110 is provided with a cooling water pump 111 , and the cooling water pump 111 is used to circulate the first cooling medium to the refrigeration unit 100 through the heat exchanger 220 .

[0038] In this embodiment, the first pipeline 110 is provided with a cooling water pump 111, which is used to control the circulation of the first cooling medium in the first pipeline 110, so that the first cooling medium whose temperature is controlled by the refrigeration unit 100 exchanges heat through the heat exchanger 220 and then flows to the refrigeration unit 100.

[0039] It should be noted that, in the present embodiment, the first cooling medium after heat exchange in the heat exchanger 220 does not pass through other heat exchangers 220, and is transported to the refrigeration unit 100 through the first pipe 110 connected to the water inlet of the refrigeration unit 100. The heat exchangers 220 are arranged in parallel, and the cooling water pump 111 is arranged in the first pipe 110 before the first cooling medium flows to each heat exchanger 220, that is, the cooling water pump 111 is located on the first pipe 110 and close to the water outlet of the refrigeration unit 100, and is used to extract the first cooling medium.

[0040] Preferably, a coolant pump 231 is provided between the energy storage module and the heat exchanger 220 to allow the second cooling medium to circulate along the energy storage module and the heat exchanger 220 .

[0041] It can be understood that a coolant pump 231 is provided between the energy storage module and the heat exchanger 220. The coolant pump 231 is located on the second pipe 230 and can control the circulation of the second cooling medium between the energy storage module and the heat exchanger 220. That is, the second cooling medium circulating in the energy storage module flows to the heat exchanger 220 through the second pipe 230, and then flows to the energy storage module again along the second pipe 230.

[0042] It should be noted that the specific type of the second cooling medium can be adjusted according to the specific type of the energy storage module, and is not specifically limited here, as long as it can achieve the above purpose.

[0043] Preferably, the heat exchanger 220 is provided with a first inlet, a first outlet, a first channel, a second inlet, a second outlet and a second channel. The first inlet and the first outlet are respectively used for the first cooling medium to flow into and out of the first channel, the second inlet and the second outlet are respectively used for the second cooling medium to flow into and out of the second channel, the first channel and the second channel are spaced apart, the first inlet and the second outlet are adjacent to each other, and the first outlet and the second inlet are adjacent to each other.

[0044] In this embodiment, the flow directions of the first cooling medium and the second cooling medium in the heat exchanger 220 are opposite, which is used to improve the heat exchange efficiency between the first cooling medium and the second cooling medium. The heat exchanger 220 is provided with a first inlet and a first outlet for the first cooling medium to flow into and out of the first channel. The heat exchanger 220 is also provided with a second inlet and a second outlet for the second cooling medium to flow into and out of the second channel. The first channel and the second channel are arranged at intervals, wherein the interval between the first channel and the second channel can be selected from a material that is easy for heat exchange, and the interval distance between the first channel and the second channel can be adjusted according to actual conditions. No specific limitation is made here, as long as the above purpose can be achieved.

[0045] Preferably, a first temperature detector is provided between the first outlet and the water inlet, and a second temperature detector is provided between the second inlet and the energy storage module. The first temperature detector and the second temperature detector are used to detect the temperatures of the first cooling medium and the second cooling medium, respectively.

[0046] It should be noted that a first temperature detector for detecting the temperature of the first cooling medium after flowing out of the heat exchanger 220 is provided between the first outlet and the water inlet, and a second temperature detector for detecting the temperature of the second cooling medium after flowing out of the energy storage module is provided between the second inlet and the energy storage module. Preferably, the first temperature detector and the second temperature detector do not affect the flow of the first cooling medium and the second cooling medium. The types of the first temperature detector and the second temperature detector can be adjusted according to actual conditions, and are not specifically limited here, as long as the above-mentioned purpose can be achieved.

[0047] Preferably, the cooling water pump 111 and the coolant pump 231 are both provided with multifunctional valves, and the refrigeration unit 100, the first temperature detector, the second temperature detector, the cooling water pump 111 and the coolant pump 231 are all connected to the central control system for signal transmission, so that the central control system can adjust the refrigeration unit 100 and the multifunctional valve in real time.

[0048] In this embodiment, the cooling water pump 111 and the coolant pump 231 are both provided with multifunctional valves, which can adjust the pump pressure of the cooling water pump 111 and the coolant pump 231, and further adjust the flow rate of the first cooling medium and the second cooling medium. The first temperature detector and the second temperature detector are both connected to the central control system, and can transmit the temperature information of the first cooling medium and the second cooling medium at the corresponding positions to the central control system in real time, so that the central control system can adjust the refrigeration unit 100, the cooling water pump 111 and the coolant pump 231 in real time, so that the heat dissipation effect of the energy storage module reaches the expected effect.

[0049] Preferably, the first pipeline 110 and the second pipeline 230 are also provided with flow meters to detect the flow rates of the first cooling medium and the second cooling medium.

[0050] It is understandable that the first pipeline 110 and the second pipeline 230 are also provided with flow meters to verify the flow rates of the first cooling medium and the second cooling medium after the cooling water pump 111 and the coolant pump 231 are regulated by the central control system.

[0051] Preferably, the energy storage module includes an immersed energy storage module 211 and a cold plate energy storage module 212 .

[0052] In this embodiment, multiple energy storage containers 200 are centrally managed and share one refrigeration unit 100, which greatly reduces the overall energy consumption of the system. Differentiation can be selected according to the performance of the energy storage module. The refrigeration unit 100 can not only centrally dissipate heat for a single type of energy storage module, such as multiple cold plate energy storage modules 212 or multiple immersed energy storage modules 211, but also centrally dissipate heat for both the cold plate energy storage modules 212 and the immersed energy storage modules 211, thereby saving energy and reducing emissions and improving management efficiency. Sharing one refrigeration unit 100 can greatly reduce costs, especially for large-scale energy storage projects, and reduce the floor space.

[0053] Preferably, the first channel and the second channel are both folded tubular structures.

[0054] It should be noted that the first channel and the second channel are preferably folded tubular structures, which help to increase the volume of the first cooling medium and the second cooling medium inside the heat exchanger 220 and improve the heat exchange efficiency. In addition, the specific shape structure of the first channel and the second channel can also be adjusted according to actual conditions as long as the above purpose can be achieved.

[0055] Preferably, the first cooling medium is antifreeze cooling water.

[0056] The refrigeration unit 100 can be selected according to the local climate characteristics of the energy storage project: if the ambient temperature in winter is high, a chiller with only refrigeration can be selected; if the temperature in winter is low, a heat pump unit with refrigeration and heating functions or a chiller with auxiliary heating can be selected. In the case of antifreeze requirements in winter, the first cooling medium in the first pipeline 110 is antifreeze cooling water with water and ethylene glycol, otherwise soft water can be used.

[0057] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0058] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0059] The above is a detailed introduction to the embodiments provided by the utility model. This article uses specific examples to illustrate the principles and implementation methods of the utility model. The description of the above embodiments is only used to help understand the method and core ideas of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. An electrochemical energy storage thermal management system, characterized in that: include: A refrigeration unit (100) is provided with a water inlet and a water outlet, the water inlet and the water outlet are respectively connected to a first pipe (110) for circulating a first cooling medium, and the refrigeration unit (100) is used to adjust the temperature of the first cooling medium; A plurality of energy storage containers (200) each comprises an energy storage module and a heat exchanger (220); the energy storage module and the heat exchanger (220) are both connected to a second pipe (230) for circulating a second cooling medium; the heat exchanger (220) is connected to the first pipe (110) so that the first cooling medium flowing out along the water outlet passes through the heat exchanger (220) and then flows to the water inlet for exchanging heat with the second cooling medium passing through the heat exchanger (220).

2. The electrochemical energy storage thermal management system according to claim 1, characterized in that: The first pipeline (110) is provided with a cooling water pump (111), and the cooling water pump (111) is used to circulate the first cooling medium to the refrigeration unit (100) through the heat exchanger (220).

3. The electrochemical energy storage thermal management system according to claim 2, characterized in that: A coolant pump (231) is provided between the energy storage module and the heat exchanger (220) so that the second cooling medium circulates along the energy storage module and the heat exchanger (220).

4. The electrochemical energy storage thermal management system according to claim 3, characterized in that: The heat exchanger (220) is provided with a first inlet, a first outlet, a first channel, a second inlet, a second outlet and a second channel. The first inlet and the first outlet are respectively used for the first cooling medium to flow into and out of the first channel. The second inlet and the second outlet are respectively used for the second cooling medium to flow into and out of the second channel. The first channel and the second channel are arranged at intervals. The first inlet and the second outlet are arranged adjacent to each other. The first outlet and the second inlet are arranged adjacent to each other.

5. The electrochemical energy storage thermal management system according to claim 4, characterized in that: A first temperature detector is provided between the first outlet and the water inlet, and a second temperature detector is provided between the second inlet and the energy storage module. The first temperature detector and the second temperature detector are used to detect the temperatures of the first cooling medium and the second cooling medium, respectively.

6. The electrochemical energy storage thermal management system according to claim 5, characterized in that: The cooling water pump (111) and the coolant pump (231) are both provided with a multifunctional valve, and the refrigeration unit (100), the first temperature detector, the second temperature detector, the cooling water pump (111) and the coolant pump (231) are all connected to the central control system for signal transmission, so that the central control system can adjust the refrigeration unit (100) and the multifunctional valve in real time.

7. The electrochemical energy storage thermal management system according to claim 1, characterized in that: The first pipeline (110) and the second pipeline (230) are also provided with flow meters to detect the flow rates of the first cooling medium and the second cooling medium.

8. The electrochemical energy storage thermal management system according to claim 1, characterized in that: The energy storage module comprises an immersed energy storage module (211) and a cold plate energy storage module (212).

9. The electrochemical energy storage thermal management system according to claim 4, characterized in that: The first channel and the second channel are both folded tubular structures.

10. The electrochemical energy storage thermal management system according to any one of claims 1 to 9, characterized in that: The first cooling medium is antifreeze cooling water.

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