Thermal management system and energy storage system
By introducing a multi-way valve between the battery and the energy storage converter coolant channel, heat exchange and utilization are achieved, solving the high energy consumption problem caused by independent loops, reducing the power consumption of the battery heating component, and simplifying the system structure.
Patent Information
- Application Number
- CN202422870279.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-22
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-11-22
AI Technical Summary
In existing thermal management systems, the battery thermal management circuit and the energy storage converter thermal management circuit are independent circuits, which prevents heat exchange and results in high overall energy consumption.
By introducing a multi-way valve between the battery coolant channel and the energy storage converter coolant channel, the two can be connected in series or in parallel. The cooling circuit can be used to cool down or heat up the battery module and the energy storage converter simultaneously or separately, and the heat generated by the energy storage converter can be recovered to heat the battery.
The energy consumption of the thermal management system has been reduced, especially in the low-temperature conditions of the energy storage cabinet, where the power consumption of the battery heating components has been reduced by 20%, while the system structure has been simplified and the cost has been reduced.
Smart Images
Figure CN223566702U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The embodiment of the utility model relates to the technical field of heat management system, especially relates to a heat management system and energy storage system. BACKGROUND
[0002] The energy storage industry is developing rapidly, and the heat management system scheme serves the power battery, takes away the heat generation of the battery during charging and discharging, and realizes the rapid heating of the battery at low temperature. In the prior art, the battery heat management loop and the energy storage converter heat management loop in the heat management system are two independent loops, the battery heat management loop and the energy storage converter heat management loop work independently, and the heat in the two loops cannot be exchanged, which may cause the problem of high overall energy consumption of the heat management system. UTILITY MODEL CONTENT
[0003] Therefore, the utility model provides a heat management system and energy storage system, which can realize the recycling and utilization of the heat of the energy storage converter and reduce the energy consumption of the heat management system.
[0004] In the first aspect, the utility model embodiment provides a heat management system, which comprises a refrigeration loop, a first communication channel, a battery cooling liquid channel, an energy storage converter cooling liquid channel and at least one multi-way valve.
[0005] The refrigeration loop comprises a refrigeration assembly and a heat exchanger, the heat exchanger comprises a refrigerant flow cavity and a cooling liquid flow cavity, the refrigeration assembly and the refrigerant flow cavity are communicated through a refrigerant channel, and the cooling liquid flow cavity is located in the first communication channel; the battery cooling liquid channel comprises a battery assembly, and the energy storage converter cooling liquid channel comprises an energy storage converter.
[0006] The battery cooling liquid channel and the energy storage converter cooling liquid channel are connected in series with the first communication channel, and the battery cooling liquid channel and the energy storage converter cooling liquid channel are connected through at least one multi-way valve.
[0007] In the second aspect, the utility model embodiment further provides an energy storage system, which comprises the heat management system provided by any embodiment of the utility model.
[0008] The heat management system provided by the embodiment of the utility model, by integrating the battery cooling liquid channel and the energy storage converter cooling liquid channel, when the temperature of the battery assembly and the energy storage converter is relatively high, the refrigeration circuit can be used to cool the battery assembly and the energy storage converter simultaneously or separately. When the temperature of the energy storage converter is relatively high and the battery assembly has heating demand, the cooling liquid in the energy storage converter cooling liquid channel can be used to heat the battery assembly. The heat generated by the energy storage converter during operation is recycled and used to heat the battery, which can not only meet the cooling demand of the energy storage converter, but also reduce the power consumption of the battery heating assembly in the original system, thus solving the high energy consumption problem of the energy storage cabinet under low-temperature working conditions from the root cause and reducing the energy consumption of the heat management system. BRIEF DESCRIPTION OF DRAWINGS
[0009] Figure 1 A structure schematic view of a heat management system provided by the embodiment of the utility model;
[0010] Figure 2 A structure schematic view of another heat management system provided by the embodiment of the utility model;
[0011] Figure 3 A structure schematic view of the heat management system provided by the embodiment of the utility model under the second working mode;
[0012] Figure 4 A structure schematic view of the heat management system provided by the embodiment of the utility model under the third working mode;
[0013] Figure 5 A structure schematic view of the heat management system provided by the embodiment of the utility model under the fourth working mode.
[0014] Reference signs:
[0015] 1 - first three-way valve; a - first connection port, b - second connection port; c - third connection port; 2 - first two-way valve; 3 - second two-way valve; 4 - third two-way valve; 5 - second three-way valve; d - fourth connection port; e - fifth connection port; f - sixth connection port; 6 - third three-way valve; g - seventh connection port; h - eighth connection port; i - ninth connection port; 7 - fourth three-way valve; j - tenth connection port; k - eleventh connection port; m - twelfth connection port; 8 - fourth two-way valve; 9 - fifth three-way valve; 10 - refrigeration circuit; 100 - refrigerant passage; 101 - heat exchanger; 1011 - refrigerant flow cavity; 1012 - coolant flow cavity; 102 - low-pressure charging valve; 103 - compressor; 104 - condenser; 105 - high-pressure charging valve; 106 - electronic expansion valve; 107 - high-pressure pressure and temperature sensor; 108 - low-pressure pressure and temperature sensor; 109 - pressure and temperature sensor; 20 - first communication passage; 20A - first end; 20B - second end; 20C - first connection node; 201 - first water pump; 30 - battery coolant passage; 301 - battery assembly; 302 - heating assembly; 40 - energy storage inverter coolant passage; 401 - energy storage inverter; 402 - second water pump; 50 - second communication passage; 501 - heat dissipation assembly; 5011 - heat dissipation water tank; 5012 - heat dissipation fan; 60 - third communication passage; 70 - fourth communication passage. DETAILED DESCRIPTION
[0016] The utility model will be explained in further detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described here are only for explaining the utility model, not for limiting the utility model. In addition, it needs to be explained that only the part related to the utility model is shown in the drawings for the convenience of description, not all the structures.
[0017] The terms used in the embodiments of the utility model are only for the purpose of describing specific embodiments, and are not intended to limit the utility model. It should be noted that the "upper", "lower", "left", "right" and other orientation words described in the embodiments of the utility model are described with the angle shown in the drawings, and should not be understood as limiting the embodiments of the utility model. In addition, it needs to be understood in the context that when one element is mentioned to be formed "on" or "under" another element, it can be directly formed "on" or "under" another element, or indirectly formed "on" or "under" another element through an intermediate element. The terms "first", "second" and the like are only for the purpose of description, and do not represent any order, quantity or importance, but only for distinguishing different components. The specific meaning of the above terms in the utility model can be understood by the person skilled in the art according to the specific circumstances.
[0018] Figure 1The utility model provides a kind of structure schematic diagram of thermal management system for the embodiment of the utility model, and the thermal management system can be applicable to the scene of thermal management for any battery, for example, it can be applied in energy storage system, but not limited to this. Reference Figure 1 The thermal management system includes refrigeration circuit 10, first communication channel 20, battery cooling liquid channel 30, energy storage converter cooling liquid channel 40 and at least one multi-way valve;The refrigeration circuit 10 includes refrigeration assembly and heat exchanger 101, the heat exchanger 101 includes cooling medium flow cavity 1011 and cooling liquid flow cavity 1012, the refrigeration assembly and cooling medium flow cavity 1011 are communicated by cooling medium channel 100, and cooling liquid flow cavity 1012 is located in first communication channel 20;Battery assembly 301 is included in battery cooling liquid channel 30, and energy storage converter 401 is included in energy storage converter cooling liquid channel 40;Battery cooling liquid channel 30 and energy storage converter cooling liquid channel 40 are connected in series with first communication channel 20 respectively, and battery cooling liquid channel 30 and energy storage converter cooling liquid channel 40 are connected by at least one multi-way valve.
[0019] The refrigeration circuit 10 can also be called cooling medium circuit or refrigerant circuit, and the refrigeration assembly in the refrigeration circuit 10 is communicated by the cooling medium channel 100, and the refrigeration assembly controls the circulation of the cooling medium in the cooling medium channel 100.
[0020] For example, as shown in Figure 1 The refrigeration assembly can include low-pressure charging valve 102, compressor 103, condenser 104, high-pressure charging valve 105 and electronic expansion valve 106 in sequence along the cooling medium channel 100. Among them, compressor 103, condenser 104, electronic expansion valve 106 and heat exchanger 101 can be connected in sequence along the flow direction of the cooling medium.
[0021] Compressor 103 compresses the low-temperature and low-pressure gaseous refrigerant sucked in to make it into high-temperature and high-pressure gaseous refrigerant. Compressor 103 continuously circulates this process to drive the cooling medium to flow in the refrigeration circuit 10 and provide power for the entire refrigeration cycle. The main function of condenser 104 is to cool and liquefy the high-temperature and high-pressure gaseous refrigerant discharged by compressor 103. After the gaseous refrigerant enters condenser 104, it exchanges heat with the external environment (usually through air or water), and the heat is gradually taken away, and the refrigerant temperature drops, and finally becomes high-pressure liquid refrigerant. In this embodiment, as shown in Figure 1As shown, the compressor 103 sucks in low-temperature and low-pressure gaseous refrigerant at one end, and compresses the low-temperature and low-pressure gaseous refrigerant into high-temperature and high-pressure gaseous refrigerant. Then, the high-temperature and high-pressure gaseous refrigerant flows into the condenser 104 through the other end of the compressor 103. The condenser 104 sucks in the high-temperature and high-pressure gaseous refrigerant at the inlet, and cools the high-temperature and high-pressure gaseous refrigerant into high-pressure liquid refrigerant. The electronic expansion valve 106 is arranged in the communication path between the condenser 104 and the heat exchanger 101, and can convert the high-pressure liquid refrigerant into low-temperature liquid refrigerant. The high-pressure and low-temperature liquid refrigerant is delivered into the heat exchanger 101 through the outlet of the electronic expansion valve 106. Thus, the refrigeration circuit 10 establishes a refrigeration cycle through the refrigerant to generate cold energy.
[0022] As shown in Figure 1 , the low-pressure charging valve 102 is arranged near the inlet of the compressor 103, and is used to supplement refrigerant (refrigerant) at the low-pressure end; and the high-pressure charging valve 105 is arranged near the outlet of the condenser 104, for example, can be arranged between the condenser 104 and the electronic expansion valve 106, and is used to supplement refrigerant (refrigerant) at the high-pressure end.
[0023] With reference to Figure 1 , the heat exchanger 101 is a device for realizing heat exchange, and its working principle is to make two fluids with different temperatures exchange heat in it. In some embodiments, the heat exchanger 101 can be a plate heat exchanger 101. The heat exchanger 101 includes a refrigerant flow passage 1011 and a cooling liquid flow passage 1012, the refrigerant flow passage 1011 is connected downstream of the condenser 104 and upstream of the compressor 103, that is, the inlet of the refrigerant flow passage 1011 is communicated with the condenser 104, and the outlet of the refrigerant flow passage 1011 is communicated with the compressor 103, and the low-temperature refrigerant cooled and condensed by the condenser 104 flows into the refrigerant flow passage 1011.
[0024] As shown in Figure 1 , the cooling liquid passage of the utility model embodiment is a cooling liquid flow pipeline, and the cooling liquid passage includes a first communication passage 20, a battery cooling liquid passage 30 and an energy storage converter cooling liquid passage 40. The cooling liquid flow passage 1012 of the heat exchanger 101 is located in the first communication passage 20, and the refrigerant and the cooling liquid exchange heat at the heat exchanger 101, and the low-temperature refrigerant can cool the high-temperature cooling liquid.
[0025] With reference to Figure 1, the battery assembly 301 is communicated in the battery cooling liquid channel 30, and the energy storage converter 401 is communicated in the energy storage converter cooling liquid channel 40. The battery cooling liquid channel 30 and the energy storage converter cooling liquid channel 40 are in series communication with the first communication channel 20. Considering the battery cooling liquid channel 30 and the energy storage converter cooling liquid channel 40 as a whole, the battery cooling liquid channel 30 and the energy storage converter cooling liquid channel 40 are in parallel relationship, and are in series communication with the refrigeration circuit 10 respectively. In this arrangement, the cooling liquid flowing out of the cooling liquid flow cavity 1012 can flow into the battery cooling liquid channel 30 and / or the energy storage converter cooling liquid channel 40, so that the battery assembly 301 and the energy storage converter 401 can be cooled simultaneously or separately by the refrigeration circuit 10.
[0026] Further, the utility model discloses an embodiment further proposes that at least one multi-way valve is connected between the battery cooling liquid channel 30 and the energy storage converter cooling liquid channel 40, that is, the battery cooling liquid channel 30 and the energy storage converter cooling liquid channel 40 are in series communication through at least one multi-way valve. Considering the battery cooling liquid channel 30 and the energy storage converter cooling liquid channel 40 as a whole, the battery cooling liquid channel 30 and the energy storage converter cooling liquid channel 40 are in series relationship. In this way, when the energy storage converter 401 is at a high temperature and the battery assembly 301 has heating requirements, the battery cooling liquid channel 30 and the energy storage converter cooling liquid channel 40 can be connected in series to form a circuit by controlling the opening state of the multi-way valve, and the cooling liquid at a high temperature in the energy storage converter cooling liquid channel 40 flows into the battery cooling liquid channel 30 where the battery assembly 301 is located, so that the cooling liquid in the energy storage converter cooling liquid channel 40 is used to heat the battery assembly 301. The heat generated by the energy storage converter 401 during operation is recycled and used to heat the battery, which not only meets the cooling requirements of the energy storage converter 401, but also reduces the power consumption of the battery heating assembly in the original system, fundamentally solving the high energy consumption problem of the energy storage cabinet under low temperature working conditions and reducing the energy consumption of the thermal management system. According to actual tests, the battery assembly 301 heating energy consumption can be reduced by 20% by using the utility model.
[0027] Secondly, the thermal management system has a simple structure and is easy to implement, and only needs to add a controllable and adjustable multi-way valve, and by controlling the operation of the water pump and valve components, the heat generated by the energy storage converter during operation can be recycled and used to heat the battery assembly 301. This system solves the high energy consumption problem of the energy storage unit from the system architecture, reduces the cost, and improves the product competitiveness.
[0028] Wherein, for the specific how through the multi-way valve connection of the battery cooling liquid channel 30 and the energy storage converter cooling liquid channel 40, the utility model embodiment does not carry out limitation, and the technical personnel in the prior art can design according to actual demand.Any design that can realize the connection relationship of the above-mentioned first communication channel 20, battery cooling liquid channel 30 and energy storage converter cooling liquid channel 40 is within the technical scheme range of the utility model embodiment protection.Exemplarily, in the embodiment shown in the drawing, the outlet of the battery cooling liquid channel 30 and the outlet of the energy storage converter cooling liquid channel 40 are directly communicated through a three-way valve (the first three-way valve 1 shown in the drawing), and another connecting port of the three-way valve is communicated with the first communication channel 20;The inlet of the battery cooling liquid channel 30 and the inlet of the energy storage converter cooling liquid channel 40 are communicated through part of the first communication channel 20 and the two-way valve (the second two-way valve 3 shown in the drawing) in the first communication channel 20, and the actual connection mode is not limited thereto. Figure 1 The outlet of the battery cooling liquid channel 30 and the outlet of the energy storage converter cooling liquid channel 40 are still directly communicated through a three-way valve (the first three-way valve 1 shown in the drawing) in the embodiment shown in the drawing, and the other connecting port of the three-way valve is communicated with the first communication channel 20. Figure 1 Under the setting mode shown in the drawing, the series-parallel mode of the battery cooling liquid channel 30 and the energy storage converter cooling liquid channel 40 can be adjusted by controlling the connection state of each connecting port of the first three-way valve 1 and the connection state of the second two-way valve 3.
[0029] Figure 2 Another structure diagram of the thermal management system provided by the utility model embodiment is shown in the drawing, Figure 2 The outlet of the battery cooling liquid channel 30 and the outlet of the energy storage converter cooling liquid channel 40 are still directly communicated through a three-way valve (the first three-way valve 1 shown in the drawing) in the embodiment shown in the drawing, and the other connecting port of the three-way valve is communicated with the first communication channel 20. Figure 1 The difference between the embodiment shown in the drawing and the embodiment shown in the drawing is that the inlet of the battery cooling liquid channel 30 and the inlet of the energy storage converter cooling liquid channel 40 are communicated through part of the first communication channel 20 and the two-way valve (the second two-way valve 3 shown in the drawing) and the three-way valve (the fifth three-way valve 9 shown in the drawing) in the first communication channel 20.Under this setting mode, the series-parallel mode of the battery cooling liquid channel 30 and the energy storage converter cooling liquid channel 40 can be adjusted by controlling the connection state of each connecting port of the first three-way valve 1, the connection state of the second two-way valve 3 and the connection state of each connecting port of the fifth three-way valve 9.
[0030] It should be noted that the inlet and outlet of a certain channel mentioned in the utility model embodiment refer to the pipe opening of the cooling liquid flowing into and flowing out in the pipeline.
[0031] The heat management system provided in the embodiment of the utility model, by integrating the battery cooling liquid channel 30 and the energy storage converter cooling liquid channel 40, when the temperature of the battery assembly 301 and the energy storage converter 401 is relatively high, the refrigeration circuit 10 can be used to cool the battery assembly 301 and the energy storage converter 401 simultaneously or separately. When the temperature of the energy storage converter 401 is relatively high and the battery assembly 301 has heating demand, the cooling liquid in the energy storage converter cooling liquid channel 40 can be used to heat the battery assembly 301. The heat generated by the energy storage converter 401 during operation is recycled and used to heat the battery, which can not only meet the cooling demand of the energy storage converter 401, but also reduce the power consumption of the battery heating assembly in the original system, thereby fundamentally solving the high energy consumption problem of the energy storage cabinet under low-temperature working conditions and reducing the energy consumption of the heat management system.
[0032] Optionally, reference can be continued to Figure 1 In some embodiments, the first communication channel 20 includes a first end 20A, a second end 20B and a first connection node 20C, and the heat management system further includes a first water pump 201 and a second water pump 402, the first water pump 201, the cooling liquid flow cavity 1012 and the first connection node 20C are sequentially located in the communication path of the first end 20A and the second end 20B, and the second water pump 402 and the energy storage converter 401 are sequentially connected between the inlet and the outlet of the energy storage converter cooling liquid channel 40; the multi-way valve includes a first three-way valve 1, the first three-way valve 1 includes a first connection port a, a second connection port b and a third connection port c; the first connection port a is in communication with the first end 20A of the first communication channel 20, the second connection port b is in communication with the outlet of the battery cooling liquid channel 30, and the third connection port c is in communication with the outlet of the energy storage converter cooling liquid channel 40; the inlet of the battery cooling liquid channel 30 is connected with the first connection node 20C, and the inlet of the energy storage converter cooling liquid channel 40 is connected with the second end 20B.
[0033] As Figure 1 shown, the first end 20A and the second end 20B are two pipe openings of the first communication channel 20, and the first end 20A of the first communication channel 20 is in communication with the outlets of the battery cooling liquid channel 30 and the energy storage converter cooling liquid channel 40 through the first three-way valve 1. The second end 20B of the first communication channel 20 is in communication with the inlet of the energy storage converter cooling liquid channel 40, and the first communication channel 20 is in communication with the inlet of the battery cooling liquid channel 30 at the first connection node 20C.
[0034] The first communicating passage 20 further comprises a first water pump 201, which is close to the first end 20A and located in the communicating path between the first three-way valve 1 and the heat exchanger 101. The first water pump 201 is used to control the flow of the cooling liquid in the first communicating passage 20. When the first water pump 201 is started, the cooling liquid can flow from the first end 20A to the second end 20B in the first communicating passage 20. When the first water pump 201 is closed, the cooling liquid cannot flow in the first communicating passage 20. The energy storage converter cooling liquid passage 40 further comprises a second water pump 402, which can be connected to the communicating path between the inlet of the energy storage converter cooling liquid passage 40 and the energy storage converter 401. The second water pump 402 is used to control the flow of the cooling liquid in the energy storage converter cooling liquid passage 40. When the second water pump 402 is started, the cooling liquid can flow from the inlet to the outlet of the energy storage converter cooling liquid passage 40. When the second water pump 402 is closed, the cooling liquid cannot flow in the energy storage converter cooling liquid passage 40.
[0035] The thermal management system further comprises a controller (not shown in the figure), which can be electrically connected with any electrically controlled element in the thermal management system and adjust the working state of the electrically controlled element. For example, the controller is electrically connected with the refrigeration assembly, the first water pump 201 and the first three-way valve 1. The controller adjusts the working state of the refrigeration assembly, the first water pump 201 and the first three-way valve 1 according to the temperature of the battery assembly 301 and the energy storage converter 401, so as to adjust the working mode of the thermal management system. For example, when the temperature of the battery assembly 301 and the temperature of the energy storage converter 401 are both high, the controller can control the refrigeration assembly and the first water pump 201 to be started, the second water pump 402 to be closed, and the first connecting port a, the second connecting port b and the third connecting port c of the first three-way valve 1 to be communicated. The low-temperature cooling liquid in the first communicating passage 20 which exchanges heat with the refrigerant can enter the battery cooling liquid passage 30 through the pump pressure of the first water pump 201 via the first connecting node 20C, and enter the energy storage converter cooling liquid passage 40 via the second end 20B. The cooling liquid flows back to the first communicating passage 20 from the first three-way valve 1 after passing through the battery assembly 301, and flows back to the first communicating passage 20 from the first three-way valve 1 after passing through the energy storage converter 401, so as to circulate to cool the battery assembly 301 and the energy storage converter 401. When the temperature of the battery assembly 301 is low and the temperature of the energy storage converter 401 is slightly high, the controller can control the refrigeration assembly to be closed, the second water pump 402 to be started and the first water pump 201 to be closed, and the first connecting port a, the second connecting port b and the third connecting port c of the first three-way valve 1 to be communicated. The slightly high-temperature cooling liquid in the energy storage converter cooling liquid passage 40 can flow into the battery cooling liquid passage 30, so as to use the cooling liquid passage of the energy storage converter 401 to heat the battery assembly 301, and realize the recovery and utilization of the heat of the energy storage converter 401.
[0036] Further, the above description can be further referred to Figure 1The heat management system further comprises a first two-way valve 2 and a second two-way valve 3. The first two-way valve 2 is located in the communication path between the first water pump 201 and the cooling liquid flow cavity 1012 of the heat exchanger 101. The second two-way valve 3 is located in the communication path between the first connection node 20C and the second end 20B. The heat management system comprises a first working mode and a second working mode. In the first working mode, the refrigeration assembly is started, and the first communication channel 20 is communicated with the battery cooling liquid channel 30 and the energy storage inverter cooling liquid channel 40 by controlling the first three-way valve 1, the first two-way valve 2 and the second two-way valve 3. In the second working mode, the battery cooling liquid channel 30 and the energy storage inverter cooling liquid channel 40 are communicated by controlling the first three-way valve 1 and the second two-way valve 3.
[0037] As shown in FIG. 1, the first communication channel 20 further comprises a first two-way valve 2 and a second two-way valve 3. The first two-way valve 2 is located between the first water pump 201 and the cooling liquid flow cavity 1012 of the heat exchanger 101. The first two-way valve 2 is used to communicate or cut off the flow path of the cooling liquid from the first water pump 201 to the cooling liquid flow cavity 1012. The second two-way valve 3 is located between the first connection node 20C and the second end 20B. The second two-way valve 3 is used to communicate or cut off the flow path of the cooling liquid from the cooling liquid flow cavity 1012 to the energy storage inverter cooling liquid channel 40. Figure 1
[0038] The heat management system can comprise multiple working modes. The controller controls the heat management system to enter different working modes according to the temperatures of the battery assembly 301 and the energy storage inverter 401. The first working mode can be a common forced cooling mode of the battery and the energy storage inverter. The conditions for entering this mode are that the cell temperature of the battery assembly 301 is higher than a first cell temperature threshold (a temperature value higher than the normal temperature of the cell by a certain value, for example, 25℃), and the temperature of the energy storage inverter 401 is higher than a first PCS temperature threshold (a temperature value higher than the normal working temperature of the energy storage inverter 401 by a certain value, for example, 45℃). In the first working mode, the temperatures of the battery assembly 301 and the energy storage inverter 401 are relatively high, and both of them need to be rapidly cooled down. At this time, the controller can control the refrigeration assembly, the first water pump 201 and the second water pump 402 to start, and control the first connection port a, the second connection port b and the third connection port c of the first three-way valve 1 to be communicated, and control the first two-way valve 2 and the second two-way valve 3 to be opened, so that the battery cooling liquid channel 30 and the energy storage inverter cooling liquid channel 40 are connected in parallel and connected in series with the first communication channel 20 respectively. The refrigeration circuit 10 is used to rapidly cool down the battery assembly 301 and the energy storage inverter 401 at the same time, so as to realize the target requirement of cooling the battery and the energy storage inverter 401 by low-temperature cooling liquid. Figure 1 In the figures, the cooling liquid (or refrigerant) channel in the communication state is represented by a darker line, and the cooling liquid (or refrigerant) channel in the cut-off state is represented by a lighter line. Figure 1 The first working mode is shown in the heat management system.
[0039] Figure 3 The heat management system in the second working mode is shown in the structure diagram, Figure 3 The second working mode can be a waste heat recovery and battery heating mode, and the condition for entering the mode is that the cell temperature of the battery assembly 301 is lower than the second cell temperature threshold (a temperature value lower than the normal temperature of the cell, for example, 15 DEG C), and the temperature of the energy storage converter 401 is higher than the second PCS temperature threshold (a temperature value slightly higher than the normal working temperature of the energy storage converter 401, for example, 35 DEG C). In the second working mode, the temperature of the battery assembly 301 is low, and the temperature of the energy storage converter 401 is slightly high. At this time, the controller can control the second water pump 402 to start, the first water pump 201 and the refrigeration assembly to be closed, and the first connection port a, the second connection port b and the third connection port c of the first three-way valve 1 to be communicated, the first two-way valve 2 to be closed, the second two-way valve 3 to be opened, so that the battery cooling liquid channel 30 and the energy storage converter cooling liquid channel 40 are connected in series. The cooling liquid flows through the second water pump 402, the energy storage converter 401, the first three-way valve 1, the battery assembly 301 and the second two-way valve 3 in turn and circulates, uses the heat of the energy storage converter 401 to heat the battery assembly 301, and ensures that the battery works at the best performance under the charging and discharging working condition.
[0040] Optionally, Figure 4 The heat management system in the third working mode is shown in the structure diagram, Figures 1-4 The heat management system can further include a second communication channel 50, a heat dissipation assembly 501 and a third communication channel 60; the heat dissipation assembly 501 is connected between the inlet and the outlet of the second communication channel 50; the inlet of the third communication channel 60 is connected with the first communication channel 20, and the connection node is located between the first water pump 201 and the cooling liquid flow cavity 1012; the outlet of the third communication channel 60 is connected with the inlet of the second communication channel 50, and the third communication channel 60 further includes a third two-way valve 4; the multi-way valve further includes a second three-way valve 5, and the second three-way valve 5 includes a fourth connection port d, a fifth connection port e and a sixth connection port f; the fourth connection port d is communicated with the outlet of the second communication channel 50, the fifth connection port e is communicated with the second end 20B of the first communication channel 20, and the sixth connection port f is connected with the inlet of the energy storage converter cooling liquid channel 40; the heat management system further includes a third working mode, in which the heat dissipation assembly 501 is started, and the battery cooling liquid channel 30 and the energy storage converter cooling liquid channel 40 are respectively communicated with the second communication channel 50 by controlling the first three-way valve 1, the third two-way valve 4 and the second three-way valve 5.
[0041] As shown in Figures 1-4 The second communication passage 50 and the third communication passage 60 are also cooling liquid passages, one end (an inlet) of the third communication passage 60 is connected to the outlet of the first water pump 201 in the first communication passage 20, the other end (an outlet) of the third communication passage 60 is connected to the inlet of the second communication passage 50, and the outlet of the second communication passage 50 is connected to the second end 20B of the first communication passage 20 and the inlet of the energy storage inverter cooling liquid passage 40 through the second three-way valve 5.
[0042] The heat dissipation assembly 501 is located in the second communication passage 50, the heat dissipation assembly 501 is a low-temperature heat dissipation assembly 501, and the second communication passage 50 and the third communication passage 60 can be used as a natural heat dissipation passage for the battery assembly 301 and the energy storage inverter 401, for natural cooling of the two when the temperature of the battery assembly 301 and the energy storage inverter 401 are slightly higher than the normal working temperature.
[0043] The fourth connecting port d of the second three-way valve 5 is in communication with the outlet of the heat dissipation assembly 501, the fifth connecting port e of the second three-way valve 5 is in communication with the first communication passage 20, and the sixth connecting port f of the second three-way valve 5 is in communication with the energy storage inverter cooling liquid passage 40. The third two-way valve 4 is arranged in the third communication passage 60 between the first water pump 201 and the heat dissipation assembly 501, and the third two-way valve 4 can connect or cut off the flow path of the cooling liquid in the third communication passage 60, that is, connect or cut off the flow path of the cooling liquid in the first communication passage 20 to the heat dissipation assembly 501.
[0044] The third working mode can be a common natural cooling mode of the battery and the energy storage converter. The condition for entering the third working mode is that the cell temperature of the battery assembly 301 is between the second temperature threshold and the first cell temperature threshold (for example, it can be 15-25°C), and the temperature of the energy storage converter 401 is less than the second PCS temperature threshold (for example, it can be 35°C). In the third working mode, the temperature of the battery assembly 301 and the energy storage converter 401 is slightly high, at this time, the controller can control the heat dissipation assembly 501, the first water pump 201 and the second water pump 402 to start, the refrigeration assembly is closed, and the first connecting port a, the second connecting port b and the third connecting port c of the first three-way valve 1 are all communicated, the fourth connecting port d, the fifth connecting port e and the sixth connecting port f of the second three-way valve 5 are all communicated, the second two-way valve 3 and the third two-way valve 4 are opened, and the first two-way valve 2 is closed, so that the battery cooling liquid channel 30 and the energy storage converter cooling liquid channel 40 are connected in parallel, and are connected in series with the channel where the heat dissipation assembly 501 is located. The cooling liquid flows through the third two-way valve 4, the heat dissipation assembly 501 and the second three-way valve 5 in sequence by the first water pump 201. At the second three-way valve 5, the cooling liquid is divided into two paths, one of which enters the first communication channel 20 and then flows into the battery cooling liquid channel 30 through the second two-way valve 3 to cool the battery assembly 301; the other path enters the energy storage converter cooling liquid channel 40 to cool the energy storage converter 401. Then the two paths of cooling liquid flow back to the first water pump 201 through the first three-way valve 1, and circulate according to the above path, so that the heat of the battery assembly 301 and the energy storage converter 401 is dissipated to the atmosphere through the heat dissipation assembly 501. In the third working mode, the refrigeration assembly does not need to work, which can not only meet the heat dissipation needs of the battery assembly 301 and the energy storage converter 401, but also reduce the energy consumption of the thermal management system. Figure 4 The third working mode is shown as the thermal management system processes the third working mode.
[0045] The specific components of the heat dissipation assembly 501 are not limited, and a person skilled in the art can set them according to actual needs. For example, the heat dissipation assembly 501 can continue to refer to Figures 1-4 The heat dissipation assembly 501 includes a heat dissipation water tank 5011 and a heat dissipation fan 5012. The heat dissipation water tank 5011 is connected to the second communication channel 50, and the heat dissipation fan 5012 is arranged at the side of the heat dissipation water tank 5011.
[0046] The heat dissipation water tank 5011 can be a low-temperature water tank. The heat dissipation water tank 5011 and the heat dissipation fan 5012 dissipate the heat of the cooling liquid flowing out of the battery cooling liquid channel 30 and the energy storage converter 401, realizing low-temperature circulation heat dissipation. The heat dissipation water tank 5011 and the heat dissipation fan 5012 are electrically connected with the controller, and the working states of the heat dissipation water tank 5011 and the heat dissipation fan 5012 are adjusted by the controller.
[0047] Optionally, in some embodiments of the present application, the heat dissipation fan 5012 can be installed on the side of the heat dissipation water tank 5011 and the condenser 104, so as to dissipate the heat at the heat dissipation water tank 5011 and the condenser 104 by using the heat dissipation fan 5012.
[0048] Optionally, Figure 5 The structure schematic diagram of the thermal management system provided by the present application in the fourth working mode is shown in FIG. 7. Figures 1-5 The thermal management system further comprises a fourth communication passage 70, and the multi-way valve further comprises a third three-way valve 6 and a fourth three-way valve 7. Two connection ports of the third three-way valve 6 are connected to the communication path between the first three-way valve 1 and the energy storage converter 401, and the other connection port of the third three-way valve 6 is in communication with the inlet of the fourth communication passage 70. The three connection ports of the fourth three-way valve 7 are respectively in communication with the outlet of the fourth communication passage 70, the outlet of the third communication passage 60 and the inlet of the second communication passage 50. The fourth communication passage 70 further comprises a fourth two-way valve 8. The thermal management system further comprises a fourth working mode. In the fourth working mode, the refrigeration assembly and the heat dissipation assembly 501 are started, the first communication passage 20 and the battery cooling liquid passage 30 are communicated by controlling the first three-way valve 1, and the second communication passage 50 and the energy storage converter cooling liquid passage 40 are communicated by controlling the second three-way valve 5, the third three-way valve 6, the fourth three-way valve 7 and the fourth two-way valve 8.
[0049] As shown in FIG. 7, the fourth communication passage 70 is also a cooling liquid passage. One end (inlet) of the fourth communication passage 70 is connected to the energy storage converter cooling liquid passage 40 downstream of the energy storage converter 401 through the third three-way valve 6. The other end (outlet) of the fourth communication passage 70 is connected to the outlet of the third communication passage 60 and the inlet of the second communication passage 50 through the fourth three-way valve 7. Figures 1-5 Specifically, the third three-way valve 6 comprises a seventh connection port g, an eighth connection port h and a ninth connection port i. The seventh connection port g is connected to the outlet of the energy storage converter 401, the eighth connection port h is connected to the third connection port c of the first three-way valve 1, and the ninth connection port i is connected to the inlet of the fourth communication passage 70. The fourth three-way valve 7 comprises a tenth connection port j, an eleventh connection port k and a twelfth connection port m. The tenth connection port j is connected to the outlet of the fourth communication passage 70, the eleventh connection port k is connected to the inlet of the second communication passage 50 (i.e. the inlet of the heat dissipation assembly 501), and the twelfth connection port m is connected to the outlet of the third communication passage 60. That is, the outlet of the third communication passage 60 and the inlet of the second communication passage 50 are connected through the fourth three-way valve 7.
[0050]
[0051] The fourth communication channel 70 can be understood as a channel that communicates the energy storage converter cooling liquid channel 40 with the heat dissipation assembly 501. The fourth two-way valve 8 is included in the fourth communication channel 70, and the fourth two-way valve 8 can communicate or cut off the flow path of the cooling liquid in the fourth communication channel 70. The fourth communication channel 70 and the second communication channel 50 can be regarded as a natural heat dissipation channel of the energy storage converter 401, and can be used to utilize the heat dissipation assembly 501 to naturally cool the energy storage converter 401 when the battery assembly 301 has a high temperature and the energy storage converter 401 has a slightly high temperature.
[0052] Reference can be made to Figure 5 The fourth working mode can be a battery strong cooling and energy storage converter natural cooling mode, and the condition for entering this mode is that the cell temperature of the battery assembly 301 is greater than the first cell temperature threshold, and the energy storage converter 401 temperature is less than the second PCS temperature threshold. In the fourth working mode, the battery assembly 301 has a high temperature, and the energy storage converter 401 has a slightly high temperature. At this time, the controller can control the refrigeration assembly, the heat dissipation assembly 501, the first water pump 201 and the second water pump 402 to start, and control the first connecting port a and the second connecting port b of the first three-way valve 1 to communicate, the fourth connecting port d and the sixth connecting port f of the second three-way valve 5 to communicate, the seventh connecting port g and the ninth connecting port i of the third three-way valve 6 to communicate, the tenth connecting port j and the eleventh connecting port k of the fourth three-way valve 7 to communicate, the first two-way valve 2 and the fourth two-way valve 8 to open, and the second two-way valve 3 and the third two-way valve 4 to close, so that the battery cooling liquid channel 30 and the first communication channel 20 are connected in series, and the energy storage converter cooling liquid channel 40 and the second communication channel 50 where the heat dissipation assembly 501 is located are connected in series. The cooling liquid in the first communication channel 20 becomes low-temperature cooling liquid after heat exchange with the refrigerant at the heat exchanger 101, the low-temperature cooling liquid flows into the battery cooling liquid channel 30 through the first connecting node 20C to cool the battery assembly 301, and then flows back to the first water pump 201 through the first three-way valve 1 and circulates in this way to quickly cool the battery assembly 301 which has a high temperature and ensure the performance of the battery assembly 301. The cooling liquid in the energy storage converter cooling liquid channel 40 flows into the fourth communication channel 70 through the third three-way valve 6, and then flows into the second communication channel 50 through the fourth three-way valve 7; after heat dissipation through the heat dissipation assembly 501, the low-temperature cooling liquid flows back to the energy storage converter cooling liquid channel 40 through the second three-way valve 5, and then flows through the second water pump 402 and the energy storage converter 401 in turn, cools the energy storage converter 401, and then flows into the fourth communication channel 70 again, so as to utilize the low-temperature heat dissipation assembly 501 to cool the energy storage converter 401 and reduce the energy consumption of the thermal management system.
[0053] It should be noted that the heat management systems shown in the embodiments of the present application include the second communication passage 50, the third communication passage 60 and the fourth communication passage 70, and are not limited to this. In the embodiments not shown in the drawings of the present application, the heat management system can not include at least one of the above-mentioned second communication passage 50, the third communication passage 60 and the fourth communication passage 70, and the embodiments of the present application will not be described in detail.
[0054] Optionally, in possible embodiments, the above-mentioned first three-way valve 1 can be a steering adjustable three-way valve, and the remaining three-way valves can be ordinary three-way valves. The steering adjustable three-way valve can also be used to control the flow and pressure of the fluid, thereby improving the stability of the heat management system.
[0055] Optionally, in possible embodiments, the heat management system further includes a first temperature and pressure sensor assembly, a second temperature and pressure sensor assembly and a third temperature and pressure sensor assembly, the first temperature and pressure sensor assembly is located in the refrigeration circuit, the second temperature and pressure sensor assembly is located in the battery cooling liquid passage, and the third temperature and pressure sensor assembly is located in the energy storage converter cooling liquid passage.
[0056] Optionally, with reference to Figures 1-5 , the first temperature and pressure sensor assembly can include a high-pressure pressure temperature sensor 107 and a low-pressure pressure temperature sensor 108, the high-pressure pressure temperature sensor 107 can be arranged between the compressor 103 and the condenser 104, and the low-pressure pressure temperature sensor 108 can be arranged between the refrigerant flow passage 1011 of the heat exchanger 101 and the compressor 103, so as to detect the temperature and pressure of the refrigerant, and ensure that the temperature and pressure of the refrigeration circuit 10 are normal. The second temperature and pressure sensor assembly can include at least one pressure temperature sensor 109, and the pressure temperature sensor 109 can be arranged at the outlet and the inlet of the battery assembly 301, so as to detect the temperature and pressure of the water in and out of the battery assembly 301, and protect the safety of the battery assembly 301. The third temperature and pressure sensor assembly can include at least one pressure temperature sensor 109, and the pressure temperature sensor 109 can be arranged at the outlet and the inlet of the energy storage converter 401, so as to detect the temperature and pressure of the water in and out of the energy storage converter 401, and protect the safety of the energy storage converter 401.
[0057] The pressure temperature sensor 109 is an element integrating pressure detection and temperature detection, and in other embodiments, a temperature sensor and a pressure sensor can be arranged separately, and the embodiments of the present application will not be described in detail. In addition, the positions of the components in the heat management system in the embodiments of the present application can be adjusted according to actual conditions, as long as the corresponding functions can be realized.
[0058] Optionally, with reference to Figures 1-5The thermal management system further comprises a heating assembly 302 located in the communication path between the cooling liquid flow passage 1012 and the battery assembly 301, and the heating assembly 302 is configured to heat the battery assembly 301.
[0059] As shown in Figure 1 the heating assembly 302 can be located near the inlet of the battery assembly 301, and the heating assembly 302 comprises, but is not limited to, a PTC heater configured to heat the entering cooling liquid when the temperature of the battery assembly 301 is low, so as to quickly heat the battery assembly 301 and maintain the normal operation of the battery assembly 301.
[0060] For example, when the temperature of the battery assembly 301 is very low and the temperature of the energy storage converter 401 is high, the heating assembly 302 and the energy storage converter cooling liquid passage 40 can be used simultaneously to heat the battery assembly 301, so as to improve the heating efficiency.
[0061] Optionally, the thermal management system provided in the embodiment of the present application can further comprise any component structure known to those skilled in the art, and the embodiment of the present application will not be described or limited.
[0062] Based on the same concept, the embodiment of the present application further provides a thermal management system, which comprises the thermal management system provided in any embodiment of the present application. The specific type of the energy storage system is not limited, and any system comprising a battery assembly and an energy storage converter in the energy storage related industry can be within the scope of the technical solution protected by the present application. The energy storage system provided in the embodiment of the present application comprises all the technical features and corresponding beneficial effects of the thermal management system provided in the embodiment of the present application, which will not be described in detail here.
[0063] It should be noted that the above is only the preferred embodiment of the present application and the technical principle applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, re-adjustments, mutual combinations and substitutions without departing from the scope of protection of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.
Claims
1. A thermal management system, characterized by, The heat management system comprises a refrigeration circuit, a first communication channel, a battery cooling liquid channel, an energy storage converter cooling liquid channel and at least one multi-way valve. The refrigeration circuit comprises a refrigeration assembly and a heat exchanger, the heat exchanger comprises a refrigerant flow cavity and a cooling liquid flow cavity, the refrigeration assembly and the refrigerant flow cavity are communicated through a refrigerant channel, and the cooling liquid flow cavity is located in the first communication channel; the battery cooling liquid channel comprises a battery assembly, and the energy storage converter cooling liquid channel comprises an energy storage converter; The battery cooling liquid channel and the energy storage converter cooling liquid channel are connected in series with the first communication channel, and the battery cooling liquid channel and the energy storage converter cooling liquid channel are connected through at least one multi-way valve.
2. The thermal management system of claim 1, wherein, The first communication channel comprises a first end, a second end and a first connection node, the heat management system further comprises a first water pump and a second water pump, the first water pump, the cooling liquid flow cavity and the first connection node are sequentially located in the communication path of the first end and the second end, and the second water pump and the energy storage converter are sequentially connected between the inlet and the outlet of the energy storage converter cooling liquid channel; The multi-way valve comprises a first three-way valve, the first three-way valve comprises a first connection port, a second connection port and a third connection port; the first connection port is communicated with the first end of the first communication channel, the second connection port is communicated with the outlet of the battery cooling liquid channel, and the third connection port is communicated with the outlet of the energy storage converter cooling liquid channel; The inlet of the battery cooling liquid channel is connected with the first connection node, and the inlet of the energy storage converter cooling liquid channel is connected with the second end.
3. The thermal management system of claim 2, wherein, The heat management system further comprises a first two-way valve and a second two-way valve, the first two-way valve is located in the communication path of the first water pump and the cooling liquid flow cavity; the second two-way valve is located in the communication path of the first connection node and the second end; The heat management system comprises a first working mode and a second working mode, in the first working mode, the refrigeration assembly is started, and the first communication channel is communicated with the battery cooling liquid channel and the energy storage converter cooling liquid channel through control of the first three-way valve, the first two-way valve and the second two-way valve; in the second working mode, the battery cooling liquid channel and the energy storage converter cooling liquid channel are communicated through control of the first three-way valve and the second two-way valve.
4. The thermal management system of claim 2, wherein, The heat management system further comprises a second communication channel, a heat dissipation assembly and a third communication channel; the heat dissipation assembly is connected between the inlet and the outlet of the second communication channel; the inlet of the third communication channel is connected with the first communication channel, the connection node is located between the first water pump and the cooling liquid flow cavity, the outlet of the third communication channel is connected with the inlet of the second communication channel, and the third two-way valve is further included in the third communication channel; The multi-way valve further comprises a second three-way valve, the second three-way valve comprises a fourth connecting port, a fifth connecting port and a sixth connecting port; the fourth connecting port is communicated with the outlet of the second communicating channel, the fifth connecting port is communicated with the second end of the first communicating channel, and the sixth connecting port is connected with the inlet of the energy storage inverter cooling liquid channel; The thermal management system further comprises a third working mode, in the third working mode, the heat dissipation assembly is started, and the battery cooling liquid channel and the energy storage inverter cooling liquid channel are communicated with the second communicating channel respectively by controlling the first three-way valve, the third two-way valve and the second three-way valve.
5. The thermal management system of claim 4, wherein, The thermal management system further comprises a fourth communicating channel, and the multi-way valve further comprises a third three-way valve and a fourth three-way valve; Two connecting ports of the third three-way valve are connected in the communicating path of the first three-way valve and the energy storage inverter, and the other connecting port of the third three-way valve is communicated with the inlet of the fourth communicating channel; three connecting ports of the fourth three-way valve are respectively communicated with the outlet of the fourth communicating channel, the outlet of the third communicating channel and the inlet of the second communicating channel; the fourth communicating channel further comprises a fourth two-way valve; The thermal management system further comprises a fourth working mode, in the fourth working mode, the refrigeration assembly and the heat dissipation assembly are started, the first communicating channel and the battery cooling liquid channel are communicated by controlling the first three-way valve, and the second communicating channel and the energy storage inverter cooling liquid channel are communicated by controlling the second three-way valve, the third three-way valve, the fourth three-way valve and the fourth two-way valve.
6. The thermal management system of claim 4, wherein, The heat dissipation assembly comprises a heat dissipation water tank and a heat dissipation fan, the heat dissipation water tank is communicated in the second communicating channel, and the heat dissipation fan is arranged at the side of the heat dissipation water tank.
7. The thermal management system of claim 1, wherein, The thermal management system further comprises a first temperature and pressure sensor assembly, a second temperature and pressure sensor assembly and a third temperature and pressure sensor assembly, the first temperature and pressure sensor assembly is located in the refrigeration circuit, the second temperature and pressure sensor assembly is located in the battery cooling liquid channel, and the third temperature and pressure sensor assembly is located in the energy storage inverter cooling liquid channel.
8. The thermal management system of claim 1, wherein, The thermal management system further comprises a heating assembly, the heating assembly is located in the communicating path of the cooling liquid flow cavity and the battery assembly; and the heating assembly is used for heating the battery assembly.
9. The thermal management system of claim 1, wherein, The refrigeration assembly comprises a low-pressure charging valve, a compressor, a condenser, a high-pressure charging valve and an electronic expansion valve which are communicated in sequence along the refrigerant channel.
10. An energy storage system characterized by, The thermal management system comprises the thermal management system according to any one of claims 1-9. The thermal management system comprises the thermal management system according to any one of claims 1-9.