Battery temperature control system and energy storage system having the same

Abstract

The utility model discloses a kind of battery temperature control system and energy storage system with it, the battery temperature control system includes: heat pump system, the heat pump system includes: compressor, first heat exchanger and second heat exchanger, the compressor, the first heat exchanger and the second heat exchanger are connected by first pipeline to form first circulating flow path, the first heat exchanger passes battery module to with the battery module heat exchange;Temperature compensation system, the temperature compensation system is set to one side of the second heat exchanger, the temperature compensation system and the second heat exchanger heat exchange to maintain the temperature of the second heat exchanger.According to the battery temperature control system of the utility model embodiment, has the advantages such as improving the energy efficiency and reliability of low temperature heating.

Description

Technical Field

[0001] This utility model relates to the field of battery energy storage technology, and in particular to a battery temperature control system and an energy storage system having the same. Background Technology

[0002] The energy storage system in this technology heats the battery using liquid cooling. A first heat exchanger generates heat on one side and transfers it to the battery, while a second heat exchanger releases coolness into the air. However, when the ambient temperature is too low, the heat pump system's efficiency can drop significantly at low temperatures, or it may even fail to operate. Utility Model Content

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a battery temperature control system that has advantages such as improved energy efficiency and reliability in low-temperature heating.

[0004] This invention also proposes an energy storage system with a battery temperature control system.

[0005] To achieve the above objectives, a battery temperature control system is proposed according to an embodiment of the first aspect of this utility model, comprising: a heat pump system, the heat pump system comprising: a compressor, a first heat exchanger and a second heat exchanger, the compressor, the first heat exchanger and the second heat exchanger being connected by a first pipeline to form a first circulation path, the first heat exchanger being adapted to pass through a battery module for heat exchange with the battery module; and a temperature compensation system, the temperature compensation system being disposed on one side of the second heat exchanger, the temperature compensation system exchanging heat with the second heat exchanger to maintain the temperature of the second heat exchanger.

[0006] According to an embodiment of the present invention, the battery temperature control system utilizes a temperature compensation system on one side of the second heat exchanger of the heat pump system. When the first heat exchanger of the heat pump system is heating, the reverse Carnot cycle principle is employed. The air conditioner transfers heat from the environment to one side of the first heat exchanger through refrigerant flow and phase change, thereby heating the battery module using the first heat exchanger. The compressor drives the refrigerant gas inside the first circulation path into the first heat exchanger, where it condenses and releases heat to the battery module. Simultaneously, the refrigerant on the second heat exchanger side absorbs heat from the environment and changes from a liquid to a gaseous state, thus returning the refrigerant to its initial state, where it is re-absorbed and compressed by the compressor. To prevent difficulties in absorbing heat from the environment due to excessively low ambient temperatures, the battery temperature control system of the present invention incorporates a temperature compensation system on the second heat exchanger side, providing additional heat to that side.

[0007] Therefore, the battery temperature control system according to the present invention can promote heating and has advantages such as improved energy efficiency and reliability of low-temperature heating.

[0008] According to some specific embodiments of the present invention, the temperature compensation system includes: a heating water channel, at least a section of which is disposed adjacent to the second heat exchanger; and a heater connected to the heating water channel, which is adapted to heat the fluid in the heating water channel for heat exchange with the second heat exchanger.

[0009] Furthermore, the heater is an electric heater, the heating water channel is configured as a second circulation path, and the electric heater is adapted to heat the fluid in the second circulation path.

[0010] According to some specific embodiments of the present invention, the temperature compensation system further includes: a water pump, which is connected to the second circulation path and drives the fluid flow in the second circulation path.

[0011] According to some specific embodiments of the present invention, a heat exchange coil is constructed on the side of the heating water channel adjacent to the second heat exchanger, and the heat exchange coil is adapted to exchange heat with the second heat exchanger.

[0012] According to some specific embodiments of the present invention, the temperature compensation system further includes: a fan, the fan being disposed adjacent to the heat exchange coil, the fan conveying the heat of the refrigerant in the heat exchange coil to the second heat exchanger, and / or conveying the cold energy of the second heat exchanger to the environment.

[0013] According to some specific embodiments of the present invention, a temperature sensor for detecting the temperature of the refrigerant in the heating water channel is constructed inside the heating water channel.

[0014] According to an embodiment of the second aspect of this utility model, an energy storage system is provided, the energy storage system comprising: a housing; a battery module installed in the housing; and a battery temperature control system according to the above embodiment of this utility model, the battery temperature control system being installed in the housing and exchanging heat with the battery module.

[0015] The energy storage system according to the embodiments of the present invention has advantages such as improved energy efficiency and reliability of low-temperature heating by using the battery temperature control system according to the above embodiments of the present invention.

[0016] According to some specific embodiments of the present invention, the battery modules are arranged in multiple rows, and the first heat exchanger of the heat pump system is located between two adjacent rows of battery modules.

[0017] According to some specific embodiments of this utility model, the housing is configured with an exhaust vent, and the second heat exchanger of the battery temperature control system is set corresponding to the exhaust vent.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a schematic diagram of the working principle of the battery temperature control system according to an embodiment of the present utility model.

[0021] Figure label:

[0022] Battery temperature control system 1, heat pump system 100, compressor 200, first heat exchanger 300, second heat exchanger 400.

[0023] First circulation path 101, battery module 10, temperature compensation system 500, heater 600.

[0024] Second circulation path 501, water pump 700, expansion valve 111

[0025] Heat exchange coil 502, fan 800, temperature sensor 900. Detailed Implementation

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0028] In the description of this utility model, "multiple" means two or more.

[0029] In the description of this utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0030] In the description of this utility model, the terms "above", "over" and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0031] The battery temperature control system according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0032] According to the battery temperature control system of the present invention, such as Figure 1 As shown, it includes a heat pump system 100 and a temperature compensation system 500.

[0033] The heat pump system 100 includes a compressor 200, a first heat exchanger 300, and a second heat exchanger 400. The compressor 200, the first heat exchanger 300, and the second heat exchanger 400 are connected by a first pipeline to form a first circulation path 101. The first heat exchanger 300 is adapted to pass through the battery module 10 for heat exchange with the battery module 10. A temperature compensation system 500 is disposed on one side of the second heat exchanger 400, and the temperature compensation system 500 exchanges heat with the second heat exchanger 400 to maintain the temperature of the second heat exchanger 400.

[0034] For example, in the heat pump system 100, one of the first heat exchanger 300 and the second heat exchanger 400 functions as an evaporator, while the other functions as a condenser. When cooling the battery module 10, the first heat exchanger 300 functions as an evaporator and the second heat exchanger 400 functions as a condenser; when heating the battery module 10, the first heat exchanger 300 functions as a condenser and the second heat exchanger 400 functions as an evaporator. An expansion valve 111 is provided between the first heat exchanger 300 and the second heat exchanger 400 to control the refrigerant pressure inside the first circulation path 101.

[0035] According to the battery temperature control system 1 of this utility model embodiment, a temperature compensation system 500 is set on one side of the second heat exchanger 400 of the heat pump system 100. When the first heat exchanger 300 of the heat pump system 100 is heating, the reverse Carnot cycle principle is utilized. The air conditioner transfers heat from the environment to one side of the first heat exchanger 300 through refrigerant flow and phase change, thereby using the first heat exchanger 300 to heat the battery module 10. The compressor drives the refrigerant gas inside the first circulation path 101 into the first heat exchanger 300. In the first heat exchanger 300, the refrigerant releases heat to the battery module 10. At the same time, the refrigerant on the second heat exchanger 400 side can absorb heat from the environment and change from liquid to gas. In this way, the refrigerant returns to its initial state and is re-drawn into and compressed by the compressor. To prevent difficulties in absorbing heat from the environment due to excessively low ambient temperatures, the battery temperature control system 1 of this invention includes a temperature compensation system 500 on one side of the second heat exchanger 400. This provides additional heat to the second heat exchanger 400, allowing it to absorb more heat and transfer it to the first heat exchanger 300 via a refrigerant, thereby promoting heat release from the first heat exchanger 300. As a result, the first heat exchanger 300 can continuously heat the battery module 10 without causing shutdown, improving heating efficiency and reliability.

[0036] Therefore, the battery temperature control system 1 according to the present invention can promote heating and has the advantages of improving the energy efficiency and reliability of low-temperature heating.

[0037] In some specific embodiments of this utility model, such as Figure 1 As shown, the temperature compensation system 500 includes a heating channel and a heater 600. At least a section of the heating channel is disposed adjacent to the second heat exchanger 400. The heater 600 is connected to the heating channel and is adapted to heat the fluid within the heating channel for heat exchange with the second heat exchanger 400.

[0038] The fluid in the heating water channel is heated by the heater 600 and then conducted to the second heat exchanger 400. This prevents the second heat exchanger 400 from frosting. The second heat exchanger 400 absorbs the heat from the heating water channel, so that it can absorb more heat when absorbing ambient temperature, thereby improving the heating capacity of the heat pump system 100.

[0039] Furthermore, the heater 600 is an electric heater, and the heating water channel is configured as a second circulation flow path 501. The electric heater is suitable for heating the fluid in the second circulation flow path 501.

[0040] The electric heater heats the fluid in the second circulating flow path 501. When the fluid flows to the second heat exchanger 400, it heats the second heat exchanger, promoting a temperature increase at the second heat exchanger 400. Furthermore, the heating water channel, through the circulating flow path 501, can continuously heat the second heat exchanger 400, allowing heat to be continuously transferred to the second heat exchanger 400, thereby compensating for the heat at the second heat exchanger 400, improving thermal efficiency, and reducing energy consumption.

[0041] In some specific embodiments of this utility model, the temperature compensation system 500 further includes a water pump 700. The water pump 700 is connected to the second circulation path 501 and drives the fluid flow within the second circulation path 501.

[0042] The water pump 700 drives the fluid flow within the second circulation path 501, ensuring that heat is effectively and continuously transferred to the lower-temperature second heat exchanger 400. The water pump 700 also maintains a constant fluid flow rate, thereby keeping the heating temperature of the battery module 10 constant. Furthermore, by continuously driving the fluid circulation, the water pump 700 improves the heat exchange efficiency of the first circulation path 101 and the second circulation path 501, enabling faster heat exchange and thus optimizing the overall temperature control effect.

[0043] In some specific embodiments of this utility model, a heat exchange coil 502 is constructed on the side of the heating water channel adjacent to the second heat exchanger 400, and the heat exchange coil 502 is adapted to exchange heat with the second heat exchanger 400.

[0044] The heat exchange coil 502 increases the contact area with the second heat exchanger 400, thereby improving the efficiency of heat exchange and enabling heat to be transferred more quickly between the heating water channel and the second heat exchanger 400. The heat exchange coil 502 can also uniformly deliver the heated fluid to the second heat exchanger 400, ensuring good temperature uniformity throughout the temperature compensation system 1 and preventing the performance of the battery module 10 from being affected by excessively high or low local temperatures.

[0045] In addition, other heat exchange structures can also be installed on the side of the heating water channel adjacent to the second heat exchanger 400. For example, heating plates, heating films, heating rods, electromagnetic induction heating, etc., can also be installed on the side of the heating water channel adjacent to the second heat exchanger 400 to supplement the heat of the second heat exchanger 400.

[0046] In some specific embodiments of this utility model, the temperature compensation system 1 further includes a fan 800. The fan 800 is disposed adjacent to the heat exchange coil 502, and the fan 800 transfers the heat of the refrigerant in the heat exchange coil 502 to the second heat exchanger 400, and / or transfers the cold energy of the second heat exchanger 400 to the environment.

[0047] The fan 800 can deliver refrigerant from the heat exchange coil 502 to the second heat exchanger 400, and simultaneously deliver the cooling capacity of the second heat exchanger 400 to the environment. Furthermore, the fan 800 can independently deliver refrigerant from the heat exchange coil 502 to the second heat exchanger 400, thereby improving the heating effect of the second heat exchanger 400, and can also independently deliver the cooling capacity of the second heat exchanger 400 to the environment.

[0048] On the one hand, the fan 800 delivers heat from the heat exchange coil 502 to the second heat exchanger 400, and on the other hand, blows away the cold air from the second heat exchanger 400. By forcing airflow, the fan 800 can significantly improve the heat exchange efficiency between the heat exchange coil 502 and the surrounding air, which helps to remove the heat from the heat exchange coil 502 more quickly and provide a fast temperature control response for the battery temperature control system 1.

[0049] Furthermore, the second heat exchanger 400 is constructed with multiple fins, and the fan 800 blows air directly onto the fins. The fan 800 can effectively transfer the cooling capacity of the second heat exchanger 400 to the environment, promote the increase of the temperature of the second heat exchanger 400, and thus ensure that the battery module 10 can be effectively heated, thereby ensuring its good performance.

[0050] In some specific embodiments of this utility model, a temperature sensor 900 for detecting the temperature of the refrigerant in the heating water channel is constructed inside the heating water channel.

[0051] Temperature sensor 900 can detect the temperature of the refrigerant in the heating channel in real time, providing timely temperature data feedback, which is crucial for the normal operation of the battery temperature control system. By monitoring changes in the refrigerant temperature, temperature sensor 900 can indicate the current operating status of the system, including cooling, heating, or normal operation. Furthermore, by setting the temperature threshold of temperature sensor 900, it can help control the heating and cooling processes of the heating channel, ensuring that the battery module 10 operates within a safe temperature range.

[0052] The following describes an energy storage system according to an embodiment of the present invention.

[0053] The energy storage system according to an embodiment of the present invention includes: a housing, a battery module 10, and a battery temperature control system according to an embodiment of the present invention. The battery module 10 is installed inside the housing, and the battery temperature control system is installed inside the housing and exchanges heat with the battery module 10.

[0054] Specifically, when the battery module 10 needs to be heated, the battery temperature control system 1 activates the heat pump system 100. When the temperature sensor 900 detects that the ambient temperature is ≥-10℃ or the refrigerant temperature is ≥-8℃, the heater 600 and water pump 700 do not work, and the fan 800 operates to carry the cooling energy from the second heat exchanger 400 to the environment. When the temperature sensor 900 detects that the ambient temperature is <-10℃ or the refrigerant temperature is less than -10℃, the heater 600, water pump 700, and fan 800 all operate normally. The air flows through the heat exchange coil 502, is heated, and then passes through the second heat exchanger 400, carrying away the cooling energy from the second heat exchanger 400, ultimately enabling the heat pump system 100 to operate in ultra-low temperature environments.

[0055] Therefore, the energy storage system according to the present invention, through the battery temperature control system of the above embodiment, has advantages such as improved energy efficiency and reliability of low-temperature heating.

[0056] In some specific embodiments of this utility model, the battery modules 10 are arranged in multiple rows, and the first heat exchanger 300 of the heat pump system 100 is located between two adjacent rows of battery modules 10.

[0057] Placing the first heat exchanger 300 between the battery modules 10 maximizes the contact area of ​​the heat exchanger, thereby achieving more efficient heat exchange and quickly regulating the temperature of the battery modules 10. This arrangement reduces the thermal resistance between the refrigerant and the battery modules 10, improves heat transfer efficiency, and ensures that the battery modules 10 operate within their optimal temperature range.

[0058] The first heat exchanger 300 located between adjacent battery modules 10 can better coordinate the temperature of the two rows of battery modules 10, making the temperature distribution of the entire battery module array more uniform and avoiding local overheating or overcooling problems.

[0059] In some specific embodiments of this utility model, the housing is equipped with an exhaust vent, and the second heat exchanger 400 of the battery temperature control system 1 is set corresponding to the exhaust vent.

[0060] The exhaust vent effectively dissipates heat from the battery temperature control system 1, preventing the battery module 10 from overheating. This is crucial for battery safety and performance, as excessively high temperatures can reduce battery efficiency, shorten lifespan, and even pose safety hazards.

[0061] Meanwhile, by setting an exhaust vent at the corresponding position of the second heat exchanger 400 within the housing, good air circulation is possible inside the housing. Cool air from the second heat exchanger 400 can be quickly blown out of the housing, thus maintaining a higher temperature for the second heat exchanger 400. Simultaneously, the internal and external circulation of the housing maintains a constant pressure, contributing to the overall temperature uniformity of the energy storage system. This airflow helps dissipate heat generated by the battery module 10 and other components, improving the cooling efficiency of the energy storage system.

[0062] Other components and operations of the battery temperature control system and energy storage system according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0063] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0064] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery temperature control system, characterized in that, include: A heat pump system, comprising: a compressor, a first heat exchanger, and a second heat exchanger, wherein the compressor, the first heat exchanger, and the second heat exchanger are connected by a first pipeline to form a first circulation path, and the first heat exchanger is adapted to pass through a battery module for heat exchange with the battery module. A temperature compensation system is provided on one side of the second heat exchanger, and the temperature compensation system exchanges heat with the second heat exchanger to maintain the temperature of the second heat exchanger.

2. The battery temperature control system according to claim 1, characterized in that, The temperature compensation system includes: A heating water channel, at least a section of which is disposed adjacent to the second heat exchanger; A heater connected to the heating channel, the heater being adapted to heat the fluid within the heating channel for heat exchange with the second heat exchanger.

3. The battery temperature control system according to claim 2, characterized in that, The heater is an electric heater, and the heating water channel is configured as a second circulation flow path. The electric heater is adapted to heat the fluid in the second circulation flow path.

4. The battery temperature control system according to claim 3, characterized in that, The temperature compensation system also includes: A water pump, which is connected to the second circulation path and drives the fluid flow within the second circulation path.

5. The battery temperature control system according to claim 2, characterized in that, A heat exchange coil is constructed on the side of the heating water channel adjacent to the second heat exchanger, the heat exchange coil being adapted to exchange heat with the second heat exchanger.

6. The battery temperature control system according to claim 5, characterized in that, The temperature compensation system further includes: A fan is provided adjacent to the heat exchange coil. The fan delivers heat from the refrigerant in the heat exchange coil to the second heat exchanger, and / or delivers cold energy from the second heat exchanger to the environment.

7. The battery temperature control system according to claim 2, characterized in that, The heating water channel is equipped with a temperature sensor for detecting the temperature of the refrigerant inside the heating water channel.

8. The energy storage system according to claim 1, characterized in that, include: Box; A battery module, wherein the battery module is installed inside the housing; The battery temperature control system according to any one of claims 1-7 is installed inside the housing and exchanges heat with the battery module.

9. The battery temperature control system according to claim 8, characterized in that, The battery modules are arranged in multiple rows, and the first heat exchanger of the heat pump system is located between two adjacent rows of battery modules.

10. The battery temperature control system according to claim 8, characterized in that, The housing is equipped with an exhaust vent, and the second heat exchanger of the battery temperature control system is located corresponding to the exhaust vent.

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