Heat exchange system and heat management system of energy storage element

Abstract

The utility model provides a heat exchange system and a heat management system of an energy storage element. A shell is arranged outside the energy storage element, an air duct is formed between the energy storage element and the shell, blowing equipment and an internal heat exchanger are arranged in the shell, and the two ends of the internal heat exchanger are connected with a first connecting pipe and a second connecting pipe respectively; the heat exchange system further comprises an external heat exchange unit, the external heat exchange unit comprises an external heat exchanger, and the first connecting pipe and the second connecting pipe are connected with the external heat exchanger. According to the application, accurate temperature control of the energy storage element can be realized to meet the individual requirement of a single energy storage element on the temperature, stable operation of the energy storage element is fully ensured, energy saving can be realized, and when some energy storage elements have safety accidents, the influence on other elements can be reduced.

Description

Technical Field

[0001] The present application relates to a heat exchange system and a thermal management system for an energy storage element. Background Art

[0002] Energy storage elements usually generate a lot of heat when working, and a heat exchange system needs to be set up to control their temperature. The thermal management system of energy storage elements is a system used to manage the temperature of energy storage elements. It can effectively control the temperature of energy storage elements, thereby improving the performance and life of energy storage elements. The working principle of the energy storage element thermal management system is to monitor the temperature of the energy storage element and then control the working state of the energy storage element according to the temperature change, so as to achieve the purpose of controlling the temperature of the energy storage element. The energy storage element thermal management system has been widely used in electric vehicles, solar energy and other energy storage element panels, energy storage and computing power chips and other fields.

[0003] Thermal management systems usually consist of multiple sensors, controllers, and actuators. Sensors are used to monitor the temperature of energy storage elements, and controllers control the working state of actuators based on the temperature information detected by sensors. Actuators can be fans, various coolers, or heaters, etc., and their function is to control the temperature of energy storage elements by blowing, cooling, or heating. When the temperature of the energy storage element is too high, the controller can start the fan or water pump to cool the energy storage element and reduce the temperature of the energy storage element. When the temperature of the energy storage element is too low, the controller can start the heater to heat the energy storage element and increase the temperature of the energy storage element.

[0004] At present, the temperature control of energy storage components is generally achieved through forced convection heat exchange between the energy storage components and the heat exchange medium, liquid cooling conduction heat exchange, phase change conduction and convection heat exchange, etc. However, the existing technology cannot accurately control the temperature of stacked energy storage components and cannot meet the personalized needs of energy storage components for heat exchange during charging and discharging. At the same time, for energy storage components that do not require heat exchange, forced heat exchange is provided, which wastes the energy required for the operation of the thermal management system. Utility Model Content

[0005] The present application provides a heat exchange system and a thermal management system for an energy storage element, which can achieve precise temperature control of the energy storage element to meet the personalized temperature requirements of a single energy storage element, while fully ensuring the stable operation of the energy storage element, and can also achieve energy saving, and when a safety accident occurs in some energy storage elements, it can reduce the impact on other elements.

[0006] The present application relates to a heat exchange system of an energy storage element, wherein a shell is provided on the outside of the energy storage element, an air duct is formed between the energy storage element and the shell, a blowing device and an internal heat exchanger are provided inside the shell, and a first connecting pipe and a second connecting pipe are connected to both ends of the internal heat exchanger respectively; the heat exchange system also includes an external heat exchange unit, the external heat exchange unit includes an external heat exchanger, and the first connecting pipe and the second connecting pipe are respectively connected to the external heat exchanger.

[0007] In which, a throttle valve may be provided between the internal heat exchanger and the first connecting pipe, and / or a reversing valve may be provided between the internal heat exchanger and the external heat exchanger; the external heat exchange unit may also include a compressor, the first connecting pipe is connected to the inlet of the compressor, the outlet of the compressor is connected to the inlet of the external heat exchanger, and the outlet of the external heat exchanger is connected to the second connecting pipe; one end of the first connecting pipe and the second connecting pipe are both connected to the reversing valve, and the reversing valve may also be provided with two interfaces, which are respectively connected to the compressor and the external heat exchanger; the external heat exchange unit may also include a forced convection device for dissipating heat from the external heat exchanger; the heat exchange system may also include a controller, the controller may be connected to the blowing device and the external heat exchange unit, or the controller may be connected to the blowing device, the throttle valve, the reversing valve and the compressor.

[0008] The present application also relates to a thermal management system for an energy storage element, comprising the heat exchange system as described above, wherein a sensor may be included, the sensor detects the state information of the energy storage element, the controller may be connected to the blowing device and the external heat exchange unit; at least two of the energy storage elements may be connected in parallel to the first connecting pipe and the second connecting pipe.

[0009] A heat exchange system and a thermal management system of an energy storage element according to the present application have the following technical advantages:

[0010] (1) The energy storage element exchanges heat through a separate heat exchange system. An air duct is provided between the energy storage element and the housing, which can make the heat exchange of the energy storage element more sufficient and uniform. It can also achieve separate control and individual control of each energy storage element, which is convenient for energy saving and stable operation of the system. At the same time, it avoids the problem of the whole system not being able to operate normally due to damage to individual energy storage elements.

[0011] (2) The temperature, flow rate and heat exchange air volume of the heat exchange medium in the heat exchange system can be controlled by the controller to meet the different temperature requirements of the energy storage components, making the control more accurate and effective. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1It is a schematic diagram of the heat exchange system of the energy storage element of the present application.

[0013] Figure 2 It is a schematic diagram of the wind duct outside the energy storage element in this application. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solution and advantages of the present application more clear, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other arbitrarily without conflict.

[0015] According to a heat exchange system of an energy storage element of the present application, a shell is provided on the outside of the energy storage element, and an air duct is formed between the energy storage element and the shell. A blowing device and an internal heat exchanger are also provided in the shell, and the blowing device is used to blow air to accelerate the air volume circulation and improve the heat exchange efficiency. The two ends of the internal heat exchanger are respectively connected with a first connecting pipe and a second connecting pipe. An external heat exchange unit is also provided, and the external heat exchange unit includes an external heat exchanger and a compressor. Among them, the first connecting pipe is connected to the inlet of the compressor, the outlet of the compressor is connected to the inlet of the external heat exchanger, and the outlet of the external heat exchanger is connected to the second connecting pipe.

[0016] Preferably, a throttle valve may be provided between the internal heat exchanger and the first connecting pipe to control the opening and closing of the energy storage element heat exchange system. When there are multiple energy storage elements, each energy storage element may be switched on and off as required to achieve personalized control. A reversing valve may also be provided between the internal heat exchanger and the external heat exchanger to switch between cooling and heating modes. Preferably, the external heat exchange unit may also include a forced convection device, which may be an external fan for forced convection heat exchange of the external heat exchanger.

[0017] The present application also relates to a thermal management system for an energy storage element, which includes, in addition to the above-mentioned heat exchange system, a sensor and a controller, wherein the sensor is used to detect the state information of the energy storage element, and the controller is connected to a blowing device and a compressor to control the opening and closing of the blowing device and the compressor, and can also control the operating speed of the blowing device. Among them, the number of energy storage elements can be at least one. When the number of energy storage elements is more than two, they can be connected in parallel to the first connecting pipe and the second connecting pipe.

[0018] Preferably, the controller can also be connected to a throttle valve, a reversing valve, a forced convection device, etc., which can not only realize the opening and closing of the above-mentioned devices, but also control their opening and closing degrees or operating speeds. The thermal management system of the present application can perform personalized control on individual energy storage elements according to the detected state information of the energy storage elements to achieve more scientific and reasonable energy-saving control, while also avoiding the impact of damage to individual energy storage elements on the entire system. An embodiment of the present application will be described in detail below in conjunction with the accompanying drawings.

[0019] like Figure 1-2 As shown, the energy storage element 11 is placed in a closed shell 12, and each shell 12 is provided with a separate heat exchange unit. The heat exchange unit includes a fan 13 and an internal heat exchanger 14, the interface of the internal heat exchanger 14 extends from the shell 12, one end of the interface is connected to the throttle valve 21, the throttle valve 21 is connected to the first connecting pipe 22 through a pipeline, and the other end of the interface is connected to the second connecting pipe 23. The external heat exchange unit 4 includes a compressor 41, an external heat exchanger 42 and a fan 43, wherein the compressor 41 is connected to the external heat exchanger 42, and the fan 43 is used to blow air to the external heat exchanger 42. Preferably, the external heat exchange unit 4 can also include a controller 44 for controlling the operation of the entire heat exchange system. A reversing valve 24 is provided between the external heat exchange unit 4 and the first connecting pipe 22 and the second connecting pipe 23. One end of the first connecting pipe 22 and the second connecting pipe 23 are both connected to the reversing valve 24. The reversing valve 24 is also provided with two interfaces, which are respectively connected to the compressor 41 of the external heat exchange unit 4 and the external heat exchanger 42 to form a circulation passage for the heat exchange medium.

[0020] When the energy storage element 11 needs to be cooled, the heat exchange medium enters the inlet of the compressor 41 through the reversing valve 24 from the second connecting pipe 23, and is compressed by the compressor 41 to do work. The heat exchange medium flows out of the outlet of the compressor 41 and enters the external heat exchanger 42. The external heat exchanger 42 exchanges heat with the surrounding environment through the flowing airflow generated by the operation of the fan 43 or other natural convection methods. The heat exchange medium further flows into the first connecting pipe 22 through the reversing valve 24. When the energy storage element 11 needs to be cooled, the throttle valve 21 opens and performs throttling expansion. The heat exchange medium exchanges heat with the air in the shell 12 in the internal heat exchanger 14, and the fan 13 generates flowing gas. The gas flows in the air duct formed by the energy storage element 11 and the shell 12, exchanges heat with the surface of the energy storage element 11, and flows back to the inlet of the internal heat exchanger 14 through the air duct formed by the energy storage element 11 and the shell 12, and exchanges heat with the internal heat exchanger 14 again. After the heat exchange medium exchanges heat with the internal heat exchanger 14, it flows out of the internal heat exchanger 14 into the second connecting pipe 23 and is then sucked into the compressor 41, and the heat exchange cycle is repeated.

[0021] When the energy storage element 11 needs to be heated, the heat exchange medium in the first connecting pipe 22 and the second connecting pipe 23 is switched through the reversing valve 24, and the heat exchange medium is discharged from the outlet of the compressor 41 and flows into the second connecting pipe 23 through the reversing valve 24. Then it flows into the internal heat exchanger 14 through the interface connected to the second connecting pipe 23. When the energy storage element 11 needs to be heated, the throttle valve 21 is opened, and the heat exchange medium exchanges heat with the air in the shell 12 in the internal heat exchanger 14, and the fan 13 generates flowing gas, which flows in the air duct formed by the energy storage element 11 and the shell 12, exchanges heat with the surface of the energy storage element 11, and flows back to the internal heat exchanger 14 through the air duct formed by the energy storage element 11 and the shell 12, and exchanges heat with the internal heat exchanger 14 again. After the heat exchange medium exchanges heat in the internal heat exchanger 14, it flows out of the internal heat exchanger 14 and enters the throttle valve 21 for throttling expansion. The heat exchange medium flows into the first connecting pipe 22 and enters the compressor 41 again through the reversing valve 24, and the heat exchange cycle is repeated.

[0022] Preferably, the energy storage element 11 of the present application corresponds to the shell 12 one by one. When multiple energy storage elements 11, such as batteries, need to be stored, a corresponding number of shells 12 are required. When multiple shells 12 are placed in a storage space 3, the storage space needs to be isolated from the external environment. The isolation method can be a building wall, metal and non-metallic plates, or insulation boards with heat insulation effects. Multiple shells 12 form a parallel relationship in the heat exchange cycle. When the energy storage element 11 has personalized temperature requirements, the closing and throttling effect of the throttle valve 21 can be controlled by the controller 44. At the same time, the controller 44 can control the operating speed of the fan 13 to achieve air volume control, forming different forced convection effects on the surface of the energy storage element 11 to meet the different heat exchange effects of the energy storage element 11.

[0023] Although the implementation methods disclosed in this application are as above, the contents described are only implementation methods adopted for facilitating the understanding of this application, and are not intended to limit this application. Any technician in the technical field to which this application belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in this application, but the scope of application protection of this application shall still be based on the scope defined in the attached claims.

Claims

1. A heat exchange system for an energy storage element, characterized in that: A shell is provided outside the energy storage element, an air duct is formed between the energy storage element and the shell, a blowing device and an internal heat exchanger are provided inside the shell, and two ends of the internal heat exchanger are respectively connected to a first connecting pipe and a second connecting pipe; The heat exchange system further includes an external heat exchange unit, the external heat exchange unit includes an external heat exchanger, and the first connecting pipe and the second connecting pipe are respectively connected to the external heat exchanger.

2. The heat exchange system according to claim 1, characterized in that: A throttle valve is provided between the internal heat exchanger and the first connecting pipe, and / or a reversing valve is provided between the internal heat exchanger and the external heat exchanger.

3. The heat exchange system according to claim 2, characterized in that: The external heat exchange unit further includes a compressor, the first connecting pipe is connected to the inlet of the compressor, the outlet of the compressor is connected to the inlet of the external heat exchanger, and the outlet of the external heat exchanger is connected to the second connecting pipe.

4. The heat exchange system according to claim 3, characterized in that: One end of the first connecting pipe and the second connecting pipe are both connected to the reversing valve. The reversing valve is also provided with two interfaces, which are respectively connected to the compressor and the external heat exchanger.

5. The heat exchange system according to claim 4, characterized in that: The external heat exchange unit also includes a forced convection device for dissipating heat from the external heat exchanger.

6. The heat exchange system according to claim 1, characterized in that: The heat exchange system further comprises a controller, which is connected to the blowing device and the external heat exchange unit.

7. The heat exchange system according to claim 3, characterized in that: The heat exchange system further comprises a controller, which is connected to the blowing device, the throttle valve, the reversing valve and the compressor.

8. A thermal management system for an energy storage element, comprising a heat exchange system, characterized in that: The heat exchange system is a heat exchange system according to any one of claims 1-7.

9. The thermal management system according to claim 8, characterized in that: It also includes a sensor, which detects the status information of the energy storage element, and the controller is connected to the blowing device and the external exchange unit.

10. The thermal management system according to claim 8 or 9, characterized in that: At least two of the energy storage elements are connected in parallel to the first connecting pipe and the second connecting pipe.

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