Thermal management system and energy storage equipment

Abstract

A thermal management system includes: a compressor including an intake side and an exhaust side; the first heat exchanger communicates with the exhaust side of the compressor; the throttling element communicates with the first heat exchanger; the heating branch comprises a first end and a second end, the first end is communicated with the air suction side of the compressor, the second end is communicated with the throttling element, and the heating branch is provided with a heating part; the third heat exchanger comprises a first flow channel and a second flow channel, the first flow channel and the second flow channel can exchange heat, the first flow channel communicates with the air suction side of the compressor and the first heat exchanger, the second flow channel communicates with the throttling element, and the second flow channel further communicates with the second end and / or the second heat exchanger. And the heating part can operate at lower power, so that the energy efficiency of the whole system is improved.

Description

Technical Field

[0001] This application relates to the technical field of energy storage thermal management, and particularly relates to a thermal management system and an energy storage device. Background Art

[0002] In the current thermal management field of the energy storage field, batteries need to be heated in a low-temperature environment. In existing thermal management units on the market, heating is generally performed through a heat pump, but the effect is relatively poor. Therefore, an electric heating device is added to the system. In low-temperature situations, the outdoor side heat exchanger is closed, and the refrigerant is heated through the electric heating device. However, after adding the electric heating, the energy efficiency of the system will become lower. Summary of the Invention

[0003] In order to overcome the problems existing in the above-mentioned prior art, this application specifically adopts the following technical solutions:

[0004] A thermal management system includes: a compressor, the compressor includes a suction side and a discharge side; a first heat exchanger, the first heat exchanger is connected to the discharge side of the compressor; a throttling element, the throttling element is connected to the first heat exchanger; it further includes a heating branch, the heating branch includes a first end and a second end, the first end is connected to the suction side of the compressor, the second end is connected to the throttling element, and the heating branch is provided with a heating part; a third heat exchanger, the third heat exchanger includes a first flow path part and a second flow path part, the first flow path part and the second flow path part can exchange heat, the first flow path part is connected to the suction side of the compressor and the first heat exchanger, the second flow path part is connected to the throttling element, and the second flow path part is further connected to the second end.

[0005] By setting the third heat exchanger, when performing heat pump heating, the refrigerant in the first flow path part exchanges heat with the refrigerant in the second flow path part, which can improve the temperature of the refrigerant in the second flow path part to a certain extent, thereby reducing the influence brought by the low ambient temperature. With the preliminary heating of the refrigerant by the third heat exchanger, the heating part can operate at a lower power, thus improving the energy efficiency of the entire system.

[0006] This application also discloses an energy storage device, including

[0007] a compressor, the compressor includes a suction side and a discharge side;

[0008] a first valve member, the first valve member includes a first valve port, a second valve port, a third valve port and a fourth valve port, the first valve port is connected to the discharge side of the compressor, and the third valve port is connected to the suction side of the compressor;

[0009] a second heat exchanger, the second heat exchanger is connected to the second valve port;

[0010] a throttling element, the throttling element is connected to the second heat exchanger;

[0011] a first heat exchanger; the first heat exchanger is connected to the throttling element; the first heat exchanger is further connected to the fourth valve port;

[0012] It further includes a heating branch, the heating branch includes a first end and a second end, the first end communicates with the second valve port, the second end communicates with the throttling element, and a heating part is provided on the heating branch;

[0013] A third heat exchanger, the third heat exchanger includes a first flow channel part and a second flow channel part, the first flow channel part and the second flow channel part can exchange heat, the first flow channel part communicates with the fourth valve port and the first heat exchanger, the second flow channel part communicates with the throttling element, and the second flow channel part also communicates with the second end and / or the second heat exchanger;

[0014] It further includes an energy storage battery, and the energy storage battery can exchange heat with the first heat exchanger.

[0015] By setting the third heat exchanger, when performing heat pump heating, the refrigerant in the first flow channel part exchanges heat with the refrigerant in the second flow channel part, which can improve the temperature of the refrigerant in the second flow channel part to a certain extent, thereby reducing the influence brought by the low ambient temperature. At the same time, with the preliminary heating of the third heat exchanger, the heating part can operate at a lower power, thus improving the energy efficiency of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 Schematic diagram of Embodiment 1 of the present application;

[0018] Figure 2 Schematic diagram of the first mode of Embodiment 3 of the present application;

[0019] Figure 3 Schematic diagram of the second mode of Embodiment 3 of the present application;

[0020] Figure 4 Schematic diagram of the first mode of Embodiment 5 of the present application;

[0021] Figure 5 Schematic diagram of the second mode of Embodiment 5 of the present application;

[0022] Figure 6 Schematic diagram of Embodiment 6 of the present application;

[0023] Figure 7 Schematic diagram of Embodiment 7 of the present application;

[0024] Reference Signs in the Drawings:

[0025] 1. Compressor; 2. First valve member; 21. First valve port; 22. Second valve port; 23. Third valve port; 24. Fourth valve port; 3. Second heat exchanger; 31. Third valve member; 4. Third heat exchanger; 41. First flow channel portion; 42. Second flow channel portion; 5. Heating portion; 51. Second valve member; 61. First throttling portion; 62. Second throttling portion; 63. Third throttling portion; 71. First heat exchange portion; 72. Second heat exchange portion; 73. Third heat exchange portion; 8. Liquid separation device; 9. Energy storage battery. Detailed implementation manners

[0026] In order to make the objectives, technical solutions and advantages of the present application clearer and more understandable, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0027] In the description of the present application, unless otherwise clearly specified and limited, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; unless otherwise specified or stated, the term "plurality" means two or more, and the term "multiple types" means two or more types; the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0028] In the description of this specification, it should be understood that the orientation terms such as "upper" and "lower" described in the embodiments of the present application are described from the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it should also be understood that when it is mentioned that an element is connected "above" or "below" another element, it can not only be directly connected "above" or "below" another element, but also be indirectly connected "above" or "below" another element through an intermediate element.

[0029] Embodiment 1

[0030] A thermal management system includes: a compressor 1, and the compressor 1 includes a suction side and a discharge side;

[0031] A first heat exchanger that communicates with the discharge side of the compressor 1;

[0032] A throttling element that communicates with the first heat exchanger;

[0033] It further includes a heating branch circuit, the heating branch circuit includes a first end 52 and a second end 53, the first end 52 is communicated with the suction side of the compressor 1, the second end 53 is communicated with the throttling element, and the heating branch circuit is provided with a heating part 5;

[0034] A third heat exchanger 4, the third heat exchanger 4 includes a first flow channel part 41 and a second flow channel part 42, the first flow channel part 41 and the second flow channel part 42 can exchange heat, the first flow channel part 41 is communicated with the suction side of the compressor 1 and the first heat exchanger, the second flow channel part 42 is communicated with the throttling element, and the second flow channel part 42 is further communicated with the second end 53.

[0035] In this embodiment, the system belongs to a simple heat pump system. The heating part 5 can be composed of an electric heating element and a heating heat exchanger, or can be an integrated component, such as a PTC heater, a coil heater, etc. The refrigerant is compressed by the compressor 1 to become a high-temperature and high-pressure gas state, and further passes through the first flow channel part 41 of the third heat exchanger 4 to become a gas-liquid mixed state, and then enters the first heat exchanger to heat the load of the first heat exchanger, such as the energy storage battery 9. After heating, it passes through the throttling element to reduce the pressure and enters the second flow channel part 42 of the third heat exchanger 4. The high-temperature refrigerant in the first flow channel part 41 exchanges heat with the low-temperature refrigerant in the second flow channel part 42, so that the high-temperature and high-pressure gas refrigerant in the first flow channel part 41 becomes a medium-temperature and high-pressure gas-liquid mixed refrigerant, which is more suitable for heating the energy storage battery 9. And the temperature of the gas-liquid mixed refrigerant is constant, which can improve the temperature uniformity of the first heat exchanger. After the gas-liquid mixed refrigerant in the second flow channel part 42 absorbs the heat of the refrigerant in the first flow channel part 41, the liquid refrigerant begins to be converted into a gas refrigerant, and becomes a gas refrigerant after passing through the heating part 5 and / or the second heat exchanger 3, and is sucked into the suction side of the compressor 1 to complete the heating cycle. The heat exchange function of the third heat exchanger 4 can pre-cool the high-temperature and high-pressure refrigerant in the first flow channel part 41 before it enters the first heat exchanger to heat the battery, so that the temperature of the high-temperature and high-pressure refrigerant is reduced, which is more suitable for heating the battery, and can keep the refrigerant in the first heat exchanger in a gas-liquid mixed state, improve the temperature uniformity, and is beneficial to the thermal management of the energy storage battery 9. At the same time, the low-temperature refrigerant in the second flow channel part 42 can also be heated up, reducing the risk of liquid slugging of the compressor 1. And the combined use of the third heat exchanger 4 and the heating part 5 can cope with low-temperature conditions, and still have a good heating effect under low-temperature conditions, improving the low-temperature adaptability of the system. The electric heating element can operate at a low power, improving the energy efficiency of the system.

[0036] Embodiment 2

[0037] A thermal management system includes

[0038] A compressor 1, the compressor 1 includes a suction side and an exhaust side;

[0039] The first valve member 2, the first valve member 2 includes a first valve port 21, a second valve port 22, a third valve port 23 and a fourth valve port 24, the first valve port 21 communicates with the exhaust side of the compressor 1, and the third valve port 23 communicates with the suction side of the compressor 1;

[0040] The second heat exchanger 3, the second heat exchanger 3 communicates with the second valve port 22;

[0041] The throttling element, the throttling element communicates with the second heat exchanger 3;

[0042] The first heat exchanger; the first heat exchanger communicates with the throttling element; the first heat exchanger also communicates with the fourth valve port 24;

[0043] It further includes a heating branch, the heating branch includes a first end 52 and a second end 53, the first end 52 communicates with the second valve port 22, the second end 53 communicates with the throttling element, and the heating branch is provided with a heating part 5;

[0044] The third heat exchanger 4, the third heat exchanger 4 includes a first flow channel part 41 and a second flow channel part 42, the first flow channel part 41 and the second flow channel part 42 can exchange heat, the first flow channel part 41 communicates with the fourth valve port 24 and the first heat exchanger, the second flow channel part 42 communicates with the throttling element, and the second flow channel part 42 also communicates with the second end 53 and / or the second heat exchanger 3.

[0045] The thermal management system includes a first mode and a second mode. In the first mode, the first valve port 21 communicates with the second valve port 22, and the third valve port 23 communicates with the fourth valve port 24; in the second mode, the first valve port 21 communicates with the fourth valve port 24, and the third valve port 23 communicates with the second valve port 22.

[0046] In this embodiment, a first valve member 2 is added to the system. The first valve member 2 is a four-way reversing valve. The heating part 5 can be composed of an electric heating element and a heating heat exchanger, or can be an integrated component, such as a PTC heater, a coil heater, etc. This system has a first mode, namely the refrigeration mode, and a second mode, namely the heat pump mode. When the ambient temperature is high and the energy storage battery 9 needs to dissipate heat, the first valve port 21 is connected to the second valve port 22, and the third valve port 23 is connected to the fourth valve port 24. After being compressed by the compressor 1, the refrigerant becomes a high-temperature and high-pressure gaseous refrigerant. After the condensation work of the second heat exchanger 3, that is, the condenser, it becomes a medium-temperature and high-pressure liquid refrigerant. Further, through the second flow path part 42 of the third heat exchanger 4, the liquid refrigerant is depressurized by the throttling element and then becomes a low-temperature and low-pressure gas-liquid mixed refrigerant, which enters the first heat exchanger to cool and dissipate heat from the battery. After absorbing the heat of the battery, the refrigerant becomes low-temperature and low-pressure, enters the first flow path part 41 of the third heat exchanger 4, and exchanges heat with the second flow path part 42. The low-temperature and low-pressure refrigerant in the first flow path part 41 will absorb the heat of the refrigerant in the second flow path part 42, the refrigerant in the second flow path part 42 is subcooled, and the refrigerant in the first flow path part 41 is superheated. After the subcooled refrigerant enters the first heat exchanger through the throttling element, with the same heat generation of the energy storage battery 9, the proportion of the refrigerant phase change gasification is less, and the refrigerant can always be maintained in a gas-liquid two-phase state. Since the temperature of the gas-liquid two-phase state is relatively stable, the temperature uniformity of the first heat exchanger can be better, reducing the temperature difference in different regions when the first heat exchanger is a cold plate, which is beneficial to the cooling and heat dissipation of the energy storage battery 9. At the same time, after the refrigerant in the first flow path part 41 absorbs heat, it forms superheated steam and is sucked into the suction side of the compressor 1, which can reduce the risk of liquid slugging of the compressor 1. In this mode, the valve member on the heating branch will close the heating branch, and the heating branch does not participate in the refrigeration cycle. If the heating part 5 includes a heating heat exchanger, it can participate in the refrigeration cycle, the electric heating element is not turned on, and the heating heat exchanger only participates in the refrigeration cycle as a condenser;In the heat pump mode, the first valve port 21 communicates with the fourth valve port 24, and the third valve port 23 communicates with the second valve port 22. The refrigerant is compressed by the compressor 1 and becomes a high-temperature and high-pressure gas state. It further passes through the first flow path portion 41 of the third heat exchanger 4 and becomes a gas-liquid mixed state. Then it enters the first heat exchanger to heat the load of the first heat exchanger, such as the energy storage battery 9. After heating, it passes through the throttling element to reduce the pressure and enters the second flow path portion 42 of the third heat exchanger 4. The high-temperature refrigerant in the first flow path portion 41 exchanges heat with the low-temperature refrigerant in the second flow path portion 42, so that the high-temperature and high-pressure gaseous refrigerant in the first flow path portion 41 becomes a medium-temperature and high-pressure gas-liquid mixed state refrigerant, which is more suitable for heating the energy storage battery 9. Moreover, the temperature of the gas-liquid mixed state refrigerant is constant, which can improve the temperature uniformity of the first heat exchanger. After the gas-liquid mixed state refrigerant in the second flow path portion 42 absorbs the heat of the refrigerant in the first flow path portion 41, the liquid refrigerant begins to be converted into gaseous refrigerant and becomes gaseous refrigerant after passing through the heating portion 5 and / or the second heat exchanger 3, and is sucked into the suction side of the compressor 1 to complete the heating cycle. The heat exchange function of the third heat exchanger 4 can pre-cool the high-temperature and high-pressure refrigerant in the first flow path portion 41 before it enters the first heat exchanger to heat the battery, reduce the temperature of the high-temperature and high-pressure refrigerant, make it more suitable for heating the battery, and can keep the refrigerant in the first heat exchanger in a gas-liquid mixed state, improve the temperature uniformity, which is beneficial to the thermal management of the energy storage battery 99. At the same time, the low-temperature refrigerant in the second flow path portion 42 can also be heated up, reducing the risk of liquid slugging of the compressor 1. Moreover, the combined use of the third heat exchanger 4 and the heating portion 5 can cope with low-temperature situations, still have a relatively good heating effect in low-temperature situations, improve the low-temperature adaptability of the system, and the electric heating element can operate at a low power, improving the system energy efficiency.;

[0047] The heating branch further includes a second valve member 51, and the second valve member 51 can control the connection and disconnection between the second valve port 22 and the heating portion 5.

[0048] In this embodiment, the heating branch is provided with a on-off valve, and the on-off valve will be controlled to be closed in the refrigeration mode so that the heating branch is not connected, and the refrigerant passes through the second heat exchanger 3.

[0049] Optionally, the first heat exchanger includes a first heat exchange portion 71 and a second heat exchange portion 72, the first heat exchange portion 71 and the second heat exchange portion 72 are arranged in parallel, the throttling element includes a first throttling portion 61 and a second throttling portion 62, the first throttling portion 61 communicates with the first heat exchange portion 71, and the second throttling portion 62 communicates with the second heat exchange portion 72.

[0050] In this embodiment, the first heat exchange part 71 is used for thermal management of the energy storage battery 9, and the second heat exchange part 72 is used for thermal management of the PCS (power conversion system for energy storage). The first heat exchange part 71 and the second heat exchange part 72 are arranged in parallel. The first throttling part 61 is arranged between the second flow channel part 42 and the first heat exchange part 71, and the second throttling part 62 is arranged between the second flow channel part 42 and the second heat exchange part 72. The first throttling part 61 and the second throttling part 62 are expansion valves or capillary tubes. In actual operation, the PCS also needs to be cooled to improve the stability of the energy storage device and reduce the risk of thermal runaway. In the heating mode, the second throttling part 62 is fully closed. In other embodiments, the second heat exchanger 3 can be used for thermal management of other electrical components.

[0051] Optionally, there are at least two first heat exchange parts 71. The number of the first throttling parts 61 corresponds to the number of the first heat exchange parts 71. The thermal management system further includes a liquid distribution device 8, and the liquid distribution device 8 is connected between the first throttling part 61 and the second flow channel part 42.

[0052] In this embodiment, the thermal management system is a multi-split air conditioning system. There are at least two first heat exchange parts 71 in the system, and the corresponding number of first throttling parts 61 are provided. In other embodiments, multiple first heat exchange parts 71 can share one first throttling part 61. To ensure the equal refrigerant flow rate between different first heat exchange parts 71, a liquid distribution device 8, specifically a liquid distributor, is provided. The liquid distributor can evenly distribute the refrigerant to different first heat exchange parts 71, improve the equal heat exchange capacity of different first heat exchange parts 71, and improve the temperature uniformity.

[0053] Optionally, the liquid distribution device 8 includes at least one manifold, and at least one manifold is connected between the first throttling part 61 and the second flow channel part 42.

[0054] In this embodiment, using a manifold instead of a liquid distributor can save more cost. Through a multi-stage manifold, multiple distribution ports can be formed for connecting and distributing liquid to multiple first heat exchange parts 71, improving the temperature uniformity between different first heat exchange parts 71 and the heat exchange effect of the system.

[0055] Embodiment 3

[0056] Optionally, the thermal management system further includes a third valve member 31, and the third valve member 31 is connected to the second heat exchanger 3. The third valve member 31 can control the connection and disconnection between the second heat exchanger 3 and the throttling element.

[0057] In this embodiment, the third valve member 31 is disposed between the second heat exchanger 3 and the second flow path portion 42. The third valve member 31 is an on-off valve. When the system is in the refrigeration mode, the third valve member 31 is opened and the second valve member 51 is closed, and the refrigerant passes through the second heat exchanger 3 and does not pass through the heating portion 5. When the system is in the heating mode, especially when the ambient temperature is relatively low, the third valve member 31 is closed and the second valve member 51 is opened, and the refrigerant passes through the heating portion 5 and does not pass through the second heat exchanger 3. When the ambient temperature is suitable and in the heating mode, both the second valve member 51 and the third valve member 31 can be opened to make full use of the ambient temperature and improve the energy efficiency.

[0058] Embodiment 4

[0059] Optionally, the second valve member 51 is disposed between the heating portion 5 and the first end 52 or the second end 53. The second valve member 51 is a one-way valve, and the communication direction of the second valve member 51 is from the second end 53 to the first end 52.

[0060] The difference from Embodiment 2 or Embodiment 3 is that in this embodiment, the second valve member 51 is a one-way valve and is disposed between the first end 52 and the heating portion 5, and only allows the refrigerant to flow from the second end 53 to the first end 52. Therefore, in the refrigeration mode, the refrigerant cannot flow to the heating portion 5, forming automatic control without manual intervention in the control of the valve member, and the system is simpler.

[0061] Embodiment 5

[0062] Optionally, the third valve member 31 is disposed between the second heat exchanger 3 and the second flow path portion 42, or the third valve member 31 is disposed between the first end 52 and the second heat exchanger 3. The third valve member 31 is a one-way valve, and the communication direction of the third valve member 31 is from the second heat exchanger 3 to the second flow path portion 42, or from the first end 52 to the second flow path portion 42.

[0063] The difference from Embodiment 4 is that in this embodiment, both the second valve member 51 and the third valve member 31 are one-way valves and are disposed between the second heat exchanger 3 and the second end 53, and only allow the refrigerant to flow from the second heat exchanger 3 to the second end 53. Therefore, in the heating mode, the refrigerant cannot pass through the second heat exchanger 3 and directly enters the heating portion 5, forming automatic control without manual intervention in the control of the valve member, and the system is simpler. Others are the same as Embodiment 4.

[0064] Embodiment 6

[0065] The first heat exchanger further includes a third heat exchange portion 73, the third heat exchange portion 73 is disposed in parallel with the first throttling portion 61, the throttling element further includes a third throttling portion 63, and the third throttling portion 63 is communicated with the third heat exchange portion 73.

[0066] In this embodiment, the third heat exchange part is a dehumidifying evaporator. When dehumidification is required, the third throttling part 63 is opened, and the first throttling part and the second throttling part are closed, so that the moisture in the air can condense on the surface of the dehumidifying evaporator and be discharged, reducing the risk of short circuit of the energy storage device due to water ingress.

[0067] Embodiment 7

[0068] An energy storage device includes

[0069] A compressor 1, the compressor 1 includes a suction side and a discharge side;

[0070] A first valve member 2, the first valve member 2 includes a first valve port 21, a second valve port 22, a third valve port 23 and a fourth valve port 24, the first valve port 21 communicates with the discharge side of the compressor 1, and the third valve port 23 communicates with the suction side of the compressor 1;

[0071] A second heat exchanger 3, the second heat exchanger 3 communicates with the second valve port 22;

[0072] A throttling element, the throttling element communicates with the second heat exchanger 3;

[0073] A first heat exchanger; the first heat exchanger communicates with the throttling element; the first heat exchanger also communicates with the fourth valve port 24;

[0074] It further includes a heating branch, the heating branch includes a first end 52 and a second end 53, the first end 52 communicates with the second valve port 22, the second end 53 communicates with the throttling element, and the heating branch is provided with a heating part 5;

[0075] A third heat exchanger 4, the third heat exchanger 4 includes a first flow channel part 41 and a second flow channel part 42, the first flow channel part 41 and the second flow channel part 42 can exchange heat, the first flow channel part 41 communicates with the fourth valve port 24 and the first heat exchanger, the second flow channel part 42 communicates with the throttling element, and the second flow channel part 42 also communicates with the second end 53 and / or the second heat exchanger 3;

[0076] It further includes an energy storage battery 9, and the energy storage battery 9 can exchange heat with the first heat exchanger.

[0077] By providing the third heat exchanger 4, when performing heat pump heating, the refrigerant in the first flow channel part 41 exchanges heat with the refrigerant in the second flow channel part 42, which can improve the temperature of the refrigerant in the second flow channel part 42 to a certain extent, thereby reducing the influence brought by the low ambient temperature. At the same time, with the preliminary heating of the third heat exchanger 4, the heating part 5 can operate at a lower power, thereby improving the energy efficiency of the entire system, and the temperature uniformity of the entire system is better, and the system operates more energy-efficiently and stably.

[0078] As described above, it is only the preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered within the protection scope of the present application.

Claims

1. A thermal management system, characterized in that, Comprising: A compressor (1), the compressor (1) including a suction side and a discharge side; A first heat exchanger, the first heat exchanger communicating with the discharge side of the compressor (1); a throttling element, the throttling element communicating with the first heat exchanger; further including a heating branch, the heating branch including a first end (52) and a second end (53), the first end (52) communicating with the suction side of the compressor (1), the second end (53) communicating with the throttling element, the heating branch being provided with a heating portion (5); further including a third heat exchanger (4), the third heat exchanger (4) including a first flow passage portion (41) and a second flow passage portion (42), the first flow passage portion (41) and the second flow passage portion (42) being capable of heat exchange, the first flow passage portion (41) communicating with the suction side of the compressor (1) and the first heat exchanger, the second flow passage portion (42) communicating with the throttling element, the second flow passage portion (42) also communicating with the second end (53).

2. A thermal management system, characterized in that, Including A compressor (1), the compressor (1) including a suction side and a discharge side; a first valve member (2), the first valve member (2) including a first valve port (21), a second valve port (22), a third valve port (23) and a fourth valve port (24), the first valve port (21) communicating with the discharge side of the compressor (1), the third valve port (23) communicating with the suction side of the compressor (1); a second heat exchanger (3), the second heat exchanger (3) communicating with the second valve port (22); A throttling element, the throttling element communicating with the second heat exchanger (3); a first heat exchanger; the first heat exchanger communicating with the throttling element; the first heat exchanger also communicating with the fourth valve port (24); further including a heating branch, the heating branch including a first end (52) and a second end (53), the first end (52) communicating with the second valve port (22), the second end (53) communicating with the throttling element, the heating branch being provided with a heating portion (5); Further including a third heat exchanger (4), the third heat exchanger (4) including a first flow passage portion (41) and a second flow passage portion (42), the first flow passage portion (41) and the second flow passage portion (42) being capable of heat exchange, the first flow passage portion (41) communicating with the fourth valve port (24) and the first heat exchanger, the second flow passage portion (42) communicating with the throttling element, the second flow passage portion (42) also communicating with the second end (53) and / or the second heat exchanger (3).

3. The thermal management system according to claim 2, wherein The thermal management system includes a first mode and a second mode. In the first mode, the first valve port (21) communicates with the second valve port (22), and the third valve port (23) communicates with the fourth valve port (24); in the second mode, the first valve port (21) communicates with the fourth valve port (24), and the third valve port (23) communicates with the second valve port (22).

4. The thermal management system according to claim 2 or 3, characterized in that, The heating branch further includes a second valve member (51), and the second valve member (51) can control the connection and disconnection between the second valve port (22) and the heating portion (5).

5. The thermal management system according to claim 4, wherein The thermal management system further includes a third valve member (31), which is connected to the second heat exchanger (3), and the third valve member (31) can control the connection and disconnection between the second heat exchanger (3) and the throttling element.

6. The thermal management system according to claim 5, characterized in that, The second valve member (51) is disposed between the heating portion (5) and the first end (52) or the second end (53). The second valve member (51) is a one-way valve, and the connection direction of the second valve member (51) is from the second end (53) to the first end (52).

7. The thermal management system according to claim 6, characterized in that, The third valve member (31) is disposed between the second heat exchanger (3) and the second flow path portion (42), or the third valve member (31) is disposed between the first end (52) and the second heat exchanger (3). The third valve member (31) is a one-way valve, and the connection direction of the third valve member (31) is from the second heat exchanger (3) to the second flow path portion (42), or from the first end (52) to the second flow path portion (42).

8. The thermal management system according to claim 3 or 7, characterized in that, The first heat exchanger includes a first heat exchange portion (71) and a second heat exchange portion (72), the first heat exchange portion (71) and the second heat exchange portion (72) are arranged in parallel, the throttling element includes a first throttling portion (61) and a second throttling portion (62), the first throttling portion (61) is connected to the first heat exchange portion (71), and the second throttling portion (62) is connected to the second heat exchange portion (72).

9. The thermal management system according to claim 8, characterized in that, There are at least two first heat exchange portions (71), the number of the first throttling portions (61) corresponds to the number of the first heat exchange portions (71), and the thermal management system further includes a liquid distribution device (8), which is connected between the first throttling portion (61) and the second flow path portion (42).

10. The thermal management system according to claim 9, wherein The liquid distribution device (8) includes at least one manifold, and at least one of the manifolds is connected between the first throttling portion (61) and the second flow path portion (42).

11. The thermal management system according to claim 8, characterized in that, The first heat exchanger further includes a third heat exchange portion (73), the third heat exchange portion (73) is arranged in parallel with the first throttling portion (61), and the throttling element further includes a third throttling portion (63), and the third throttling portion (63) is connected to the third heat exchange portion (73).

12. An energy storage device, characterized in that, Including Compressor (1), the compressor (1) includes a suction side and a discharge side; a first valve member (2), the first valve member (2) includes a first valve port (21), a second valve port (22), a third valve port (23) and a fourth valve port (24), the first valve port (21) communicates with the discharge side of the compressor (1), the third valve port (23) communicates with the suction side of the compressor (1); a second heat exchanger (3), the second heat exchanger (3) communicates with the second valve port (22); a throttling element, the throttling element communicates with the second heat exchanger (3); a first heat exchanger, the first heat exchanger communicates with the throttling element, and the first heat exchanger also communicates with the fourth valve port (24); further includes a heating branch, the heating branch includes a first end (52) and a second end (53), the first end (52) communicates with the second valve port (22), the second end (53) communicates with the throttling element, and the heating branch is provided with a heating portion (5); Further includes a third heat exchanger (4), the third heat exchanger (4) includes a first flow channel portion (41) and a second flow channel portion (42), the first flow channel portion (41) and the second flow channel portion (42) can exchange heat, the first flow channel portion (41) communicates with the fourth valve port (24) and the first heat exchanger, the second flow channel portion (42) communicates with the throttling element, and the second flow channel portion (42) also communicates with the second end (53) and / or the second heat exchanger (3); Further includes an energy storage battery (9), the energy storage battery (9) can exchange heat with the first heat exchanger.

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