Temperature control system for a vehicle, temperature control method and program product

Abstract

The present disclosure relates to a temperature control system for a vehicle, comprising: a first refrigeration circuit having a compressor, a first condenser, a passenger compartment evaporator and a battery evaporator, wherein the first refrigeration circuit comprises a first branch flowing through the passenger compartment evaporator and a second branch flowing through the battery evaporator, a second refrigeration circuit having a compressor, a second condenser and the battery evaporator; a valve element arranged between the first branch and the second branch and being on for a refrigerant in the first refrigeration circuit and off for a refrigerant in the second refrigeration circuit; a three-way valve controlling a proportion of the refrigerant in the first refrigeration circuit and the second refrigeration circuit by adjusting a valve opening degree; a temperature sensor to detect a battery pack temperature of the vehicle; a control unit to adjust the valve opening degree of the three-way valve depending on the temperature of the battery pack. A temperature control method and a program product are also involved. Condensed water can be avoided in the battery pack.

Description

Technical Field

[0001] This disclosure relates to the technical field of vehicle temperature control, and more particularly to a temperature control system for vehicles. This disclosure also relates to a corresponding temperature control method for vehicles and a corresponding computer program product. Background Technology

[0002] In recent years, with technological advancements and increased environmental awareness, electric vehicles have garnered growing attention from consumers. The battery pack, as the primary energy storage device in electric vehicles, is a crucial component that directly impacts vehicle performance. During operation, excessively high battery pack temperatures negatively affect battery cycle life and pose risks such as combustion and explosion. Conversely, excessively low temperatures reduce charging and discharging power and capacity, leading to a significant decline in vehicle performance. Therefore, a temperature control system is essential for vehicles to maintain the battery pack within the desired operating temperature range. Furthermore, the temperature control system also regulates the passenger compartment temperature to improve the occupant's driving experience.

[0003] However, when the battery pack is in an environment with rapidly changing temperatures, condensation occurs inside the battery pack, especially at the top and bottom covers, due to the alternating high and low temperatures. This condensation may penetrate the battery pack's circuit board, causing insulation failure and seriously affecting the vehicle's driving safety. Summary of the Invention

[0004] Therefore, the purpose of this disclosure is to provide an improved temperature control system for vehicles, which can reliably balance the cooling needs of the passenger compartment and the battery pack, effectively improve the cooling efficiency of the battery pack, eliminate rapid temperature fluctuations and situations exceeding the desired range in the battery pack, and minimize the formation of condensate in the battery pack, thereby improving battery pack performance and vehicle driving safety. Furthermore, the purpose of this disclosure is also to provide a corresponding temperature control method for vehicles and a corresponding computer program product.

[0005] According to a first aspect of this disclosure, a temperature control system for a vehicle is provided, wherein the temperature control system includes at least:

[0006] - A first refrigeration circuit, the first refrigeration circuit having at least a compressor, a first condenser, a crew compartment evaporator and a battery evaporator, wherein the first refrigeration circuit includes a first branch flowing through the crew compartment evaporator and a second branch flowing through the battery evaporator;

[0007] - A second refrigeration circuit, the second refrigeration circuit having at least the compressor, the second condenser and the battery evaporator connected in sequence;

[0008] - A valve element arranged between the first branch and the second branch in such a way that it is on for the refrigerant in the first refrigeration circuit and off for the refrigerant in the second refrigeration circuit;

[0009] - A three-way valve, wherein the inlet of the three-way valve is connected to the compressor, the first outlet is connected to the first condenser, and the second outlet is connected to the second condenser, wherein the three-way valve is configured to control the proportion of refrigerant in the first refrigeration circuit and the second refrigeration circuit by adjusting the valve opening of the three-way valve;

[0010] - A temperature sensor configured to detect the temperature of the vehicle's battery pack; and

[0011] - A control unit configured to adjust the valve opening of the three-way valve according to the temperature of the battery pack.

[0012] Compared to existing technologies, the temperature control system for vehicles according to this disclosure includes a second refrigeration circuit in addition to a first refrigeration circuit comprising a first condenser, a passenger compartment evaporator, and a battery evaporator. This second refrigeration circuit has an additional second condenser and a battery evaporator. The flow rate of refrigerant in the first and second refrigeration circuits is controlled by the opening degree of a three-way valve located downstream of the compressor. A valve element arranged between the first and second branches ensures that the refrigerant in the second refrigeration circuit flows completely through the battery evaporator, thereby regulating the cooling performance of the passenger compartment evaporator and the battery evaporator. The control unit adjusts the opening degree of the three-way valve based on the battery pack temperature detected by a temperature sensor. This allows for a targeted increase in the refrigerant flow rate through the battery evaporator when the battery pack temperature rapidly changes or exceeds a defined range, thereby improving the cooling performance of the battery evaporator and stabilizing the battery pack temperature within a desired range. This minimizes the generation of condensate inside the battery pack, improving battery pack performance and vehicle driving safety.

[0013] For example, the control unit is configured such that the valve opening of the three-way valve is proportional to the temperature and / or rate of temperature change of the battery pack; and / or, the valve element is configured as a one-way valve; and / or, the control unit is communicatively connected to the temperature sensor and the three-way valve, respectively.

[0014] For example, the control unit is configured to maximize the valve opening of the three-way valve and allow the refrigerant to flow completely into the second refrigeration circuit when the temperature of the battery pack exceeds a temperature threshold and / or the rate of temperature change of the battery pack exceeds a rate of change threshold.

[0015] For example, the passenger compartment evaporator is equipped with a first throttling element, which is configured as an expansion valve and integrally integrated with the passenger compartment evaporator; and / or, the battery evaporator is equipped with a second throttling element, which is configured as an expansion valve and integrally integrated with the battery evaporator.

[0016] For example, the battery evaporator is constructed in the form of a cooling pipe extending through the battery pack and operates in a direct cooling manner.

[0017] For example, the battery evaporator is constructed in the form of a heat exchanger and functions in a liquid-cooled manner together with a liquid-cooled circuit flowing through the battery pack, wherein a circulation pump is arranged in the liquid-cooled circuit and is configured to drive the flow of coolant in the liquid-cooled circuit.

[0018] For example, the temperature control system includes a first shut-off valve disposed upstream of the first condenser in the first refrigeration circuit; and / or, the temperature control system includes a second shut-off valve configured to shut off the first branch when an occupant turns off the vehicle air conditioning; and / or, the temperature control system includes a third shut-off valve configured to shut off the second branch when the temperature of the battery pack is below a lower limit.

[0019] For example, the temperature control system includes a reservoir configured to store the refrigerant; and / or, the temperature control system includes at least one fan configured to dissipate heat to the first condenser and / or the second condenser; and / or, the temperature control system includes a heating device configured to heat the refrigerant.

[0020] According to a second aspect of this disclosure, a temperature control method for a vehicle is provided, wherein the temperature control method is implemented by a temperature control system according to this disclosure, and wherein the temperature control method includes at least the following steps:

[0021] S1: Detect the temperature of the vehicle's battery pack;

[0022] S2: Adjust the valve opening of the three-way valve of the temperature control system according to the temperature of the battery pack, so as to control the ratio of refrigerant in the first refrigeration circuit and the second refrigeration circuit of the temperature control system.

[0023] According to a third aspect of this disclosure, a computer program product is provided, comprising a computer program, characterized in that, when the computer program is executed by one or more processors, the processors are capable of executing a temperature control method according to this disclosure. Attached Figure Description

[0024] The principles, features, and advantages of this disclosure will be better understood below with reference to the accompanying drawings. The drawings include:

[0025] Figure 1 A schematic block diagram of a temperature control system for a vehicle according to an exemplary embodiment of the present disclosure is shown;

[0026] Figure 2a and Figure 2b The refrigerant in each case is shown. Figure 1 A schematic diagram of the flow in the first and second refrigeration circuits of a temperature control system.

[0027] Figure 3a and Figure 3b Schematic configurations of battery evaporators for temperature control systems according to different exemplary embodiments of the present disclosure are shown respectively;

[0028] Figure 4 A schematic flowchart of a temperature control method for a vehicle according to an exemplary embodiment of the present disclosure is shown. Detailed Implementation

[0029] To make the technical problems to be solved, the technical solutions, and the beneficial technical effects of this disclosure clearer, the disclosure will be further described in detail below with reference to the accompanying drawings and several exemplary embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0030] It should be understood that the terms "first," "second," "third," etc., used herein are for descriptive purposes only and should not be construed as indicating or implying relative importance, nor should they be construed as implicitly specifying the number of technical features indicated. Features specified with "first," "second," or "third" may expressly or implicitly indicate that at least one of those features is included.

[0031] Figure 1 A schematic block diagram of a temperature control system 100 for a vehicle according to an exemplary embodiment of the present disclosure is shown. Figure 2a and Figure 2b The refrigerant in each case is shown. Figure 1A schematic diagram of the flow in the first and second refrigeration circuits of the temperature control system 100. Here, the vehicle can be an electric vehicle or a hybrid vehicle, wherein the battery pack 200 is an important energy storage device for the vehicle and provides energy for vehicle operation.

[0032] like Figure 1 and Figure 2a As shown, the temperature control system 100 includes a first refrigeration circuit L1, which has a compressor 10, a first condenser 21, a crew compartment evaporator 30, and a battery evaporator 40. The refrigerant can travel along... Figure 2a The arrows indicate the flow direction in the first refrigeration circuit L1, where the compressor 10 is configured to compress a low-pressure gaseous refrigerant into a high-pressure, high-temperature gaseous refrigerant, thereby increasing the pressure and boiling point of the gaseous refrigerant. The high-temperature, high-pressure gaseous refrigerant discharged from the compressor 10 can flow into the first condenser 21, which is configured to condense the high-temperature, high-pressure gaseous refrigerant into a high-pressure liquid refrigerant through exothermic condensation. The first condenser 21 is particularly equipped with a finned structure to increase the heat exchange area and improve heat exchange efficiency. A portion of the liquid refrigerant discharged from the first condenser 21 flows to the passenger compartment evaporator 30, and another portion flows to the battery evaporator 40. The passenger compartment evaporator 30 and the battery evaporator 40 are arranged in parallel between the first condenser 21 and the compressor 10, each acting as a cooler. This allows the liquid refrigerant to absorb heat from the battery pack 200 and evaporate into gaseous refrigerant, thereby lowering the temperature of the passenger compartment and the battery pack 200. The gaseous refrigerant is further delivered to the compressor 10 to complete the refrigerant circulation in the first refrigeration circuit. Here, the first refrigeration circuit enables simultaneous cooling of both the vehicle's passenger compartment and the battery pack 200. Specifically, the compressor 10 speed is adjusted based on the temperature difference between the actual temperature of the passenger compartment and the desired temperature of the occupants to control the cooling effect of the passenger compartment evaporator 30. Here, the first branch 31 of the first refrigeration circuit L1 flows through the passenger compartment evaporator 30, while the second branch 41 of the first refrigeration circuit L1 flows through the battery evaporator 40.

[0033] like Figure 1 and Figure 2b As shown, the temperature control system 100 includes a second refrigeration circuit L2, which has at least a compressor 10, a second condenser 22, and a battery evaporator 40 connected in sequence, and the refrigerant can flow along the... Figure 2b The arrows in the diagram indicate the flow direction in the second refrigeration circuit L2, wherein the second condenser 22 may be constructed similarly to, and in particular identically to, the first condenser 21 and is also used to exothermically condense the high-temperature, high-pressure gaseous refrigerant discharged from the compressor 10 into a higher-pressure liquid refrigerant.

[0034] like Figure 1 , Figure 2a and Figure 2b As shown, the temperature control system 100 includes a valve element 50 arranged between the first branch 31 and the second branch 41, or between the passenger compartment evaporator 30 and the battery evaporator 40. The valve element 50 is configured to be on for the refrigerant in the first refrigeration circuit L1 and off for the refrigerant in the second refrigeration circuit L2. This ensures that the refrigerant flowing in the first refrigeration circuit L1 can simultaneously flow through the passenger compartment evaporator 30 and the battery evaporator 40, and that the refrigerant flowing in the second refrigeration circuit L2 flows entirely through the battery evaporator 40, thereby specifically increasing the refrigerant flow through the battery evaporator 40 and significantly improving the cooling performance of the battery evaporator 40. Specifically, valve element 50 can be configured as a one-way valve, wherein the refrigerant flowing in the first refrigeration circuit L1 can, under the action of fluid pressure, push the valve needle of valve element 50, configured as a one-way valve, open the valve element 50, thereby opening the valve element 50; while the refrigerant flowing in the second refrigeration circuit L2, under the action of fluid pressure, presses the valve needle of valve element 50 against the valve seat, thereby closing the valve element 50 and preventing refrigerant from flowing from the battery evaporator 40 in the second branch 41 to the passenger compartment evaporator 30 in the first branch 31. However, it is also conceivable that valve element 50 be configured in other forms that are considered meaningful by those skilled in the art, such as a shut-off valve or a solenoid valve.

[0035] like Figure 1 As shown, the temperature control system 100 includes a three-way valve 60, which is arranged downstream of the compressor 10. The inlet 61 of the three-way valve 60 is connected to the compressor 10, the first outlet 62 is connected to the first condenser 21 of the first refrigeration circuit L1, and the second outlet 63 is connected to the second condenser 22 of the second refrigeration circuit L2. By adjusting the valve opening of the three-way valve 60, the flow area of ​​the first outlet 62 and the second outlet 63 can be controlled, thereby adjusting the proportion of refrigerant in the first refrigeration circuit L1 and the second refrigeration circuit L2. In particular, the larger the valve opening of the three-way valve 60, the larger the flow area of ​​the second outlet 63, resulting in a higher proportion of refrigerant in the second refrigeration circuit L2 and a lower proportion of refrigerant in the first refrigeration circuit L1. Therefore, increasing the valve opening of the three-way valve 60 can improve the cooling performance of the battery-operated cooler 40.

[0036] like Figure 1As shown, the temperature control system 100 includes a temperature sensor 70 configured to detect the temperature of the vehicle's battery pack 200. Multiple temperature sensors 70 may be arranged inside the battery pack 200 to comprehensively detect the temperature distribution within the battery pack 200. Specifically, the temperature sensors 70 are associated with the battery management system of the battery pack 200.

[0037] like Figure 1 As shown, the temperature control system 100 includes a control unit 80, which is connected (e.g., via communication) to a temperature sensor 70 and a three-way valve 60, respectively. The control unit 80 is configured to adjust the valve opening of the three-way valve 60 based on the temperature of the battery pack detected by the temperature sensor 70, thereby adjusting the ratio of refrigerant in the first refrigeration circuit L1 and the second refrigeration circuit L2 to selectively control the cooling performance of the passenger compartment evaporator 30 and the battery evaporator 40. Furthermore, the control unit 80 can also be connected (e.g., via communication) to a compressor 10 to control the speed of the compressor 10 and to regulate the overall refrigerant flow rate in the refrigeration circuits.

[0038] For example, the control unit 80 is configured such that the valve opening of the three-way valve 60 is proportional to the temperature and / or rate of temperature change of the battery pack 200 detected by the temperature sensor 70. The higher the temperature of the battery pack 200 or the greater the rate of temperature change, the larger the valve opening of the three-way valve 60, resulting in a greater flow rate of refrigerant in the second refrigeration circuit L2, i.e., flowing through the battery evaporator 40, and a correspondingly greater cooling effect of the battery evaporator 40. This effectively reduces or maintains the temperature of the battery pack 200 within its allowable operating range, thereby preventing rapid temperature fluctuations or exceeding the desired range, minimizing condensation inside the battery pack 200, and thus improving the performance and safety of the battery pack 200.

[0039] For example, the control unit 80 is configured to maximize the opening of the three-way valve 60 and allow the refrigerant discharged from the compressor 10 to flow completely into the second condenser 22 of the second refrigeration circuit L2 when the temperature of the battery pack 200 detected by the temperature sensor 70 exceeds a temperature threshold and / or the rate of temperature change of the battery pack 200 exceeds a rate of change threshold. This maximizes the cooling effect of the battery evaporator 40 in extreme cases, thereby reducing and stabilizing the temperature of the battery pack 200 as much as possible to avoid condensation inside the battery pack 200 and even eliminate the risk of explosion of the battery pack 200. Here, the temperature threshold and the rate of change threshold are specifically derived in advance based on experimental and / or empirical data. The temperature threshold is, for example, 55°C, and the rate of change threshold is, for example, 20°C / min. Of course, other values ​​that are considered meaningful by those skilled in the art can also be considered.

[0040] For example, to regulate the refrigerant flow rate in the refrigeration circuit, the passenger compartment evaporator 30 is equipped with a first throttling element 91, which is located upstream of the passenger compartment evaporator 30. The battery evaporator 40 is equipped with a second throttling element 92, which is also located upstream of the battery evaporator 40. The first and second throttling elements 91 and 92 achieve pressure reduction and flow regulation through throttling, converting the high-pressure liquid refrigerant discharged from the first condenser 21 or the second condenser 22 into a low-pressure liquid refrigerant. Specifically, the first throttling element 91 is constructed as an expansion valve and integrated integrally with the passenger compartment evaporator 30, while the second throttling element 92 is constructed as an expansion valve and integrated integrally with the battery evaporator 40. However, it is also possible that the first and second throttling elements 91 and 92 are constructed as tube structures and are separate from the passenger compartment evaporator 30 and the battery evaporator 40, respectively.

[0041] For example, the temperature control system 100 includes a first shut-off valve 111, which is arranged upstream of the first condenser 21 in the first refrigeration circuit L1. The first shut-off valve 111 can shut off the first refrigeration circuit L1 when the temperature of the battery pack 200 exceeds a temperature threshold and / or the rate of temperature change of the battery pack 200 exceeds a rate of change threshold, so that the refrigerant flows completely to the battery evaporator 40 via the second refrigeration circuit L2, thereby ensuring sufficient cooling performance of the battery evaporator 40.

[0042] For example, the temperature control system 100 includes a second shut-off valve 112, which is arranged, for example, downstream of the passenger compartment evaporator 30 and configured to shut off the first branch 31 of the first refrigeration circuit L1 when the occupant turns off the vehicle air conditioning. However, it is also possible to arrange the second shut-off valve 112 upstream of the passenger compartment evaporator 30.

[0043] For example, the temperature control system 100 also includes a third shut-off valve 113, which is arranged, for example, downstream of the battery evaporator 40 and configured to shut off the second branch when the temperature of the battery pack 200 falls below a lower limit, such as -40°C. This allows the battery evaporator 40 to stop operating and the temperature of the battery pack 200 to rise when the temperature of the battery pack 200 is too low. Alternatively, the third shut-off valve 113 could be arranged upstream of the battery evaporator 30.

[0044] For example, the temperature control system 100 includes a heating device configured to heat the refrigerant flowing through the battery pack 200, especially when the temperature of the battery pack 200 is below a lower limit, in order to raise the temperature of the battery pack 200 as quickly as possible.

[0045] Exemplarily, the temperature control system 100 also includes a receiver 120 configured to store refrigerant in the refrigeration circuit. Here, the receiver 120 may be located, for example, downstream of the first condenser 21. However, it is also conceivable that the receiver 120 be located at other locations that are deemed meaningful by those skilled in the art, such as upstream of the compressor 10.

[0046] For example, the temperature control system 100 also includes at least one fan configured to dissipate heat from the first condenser 21 and / or the second condenser 22 to improve the heat dissipation effect of the respective condensers. Alternatively, the fan may be configured at the occupant compartment evaporator 30 and / or the battery evaporator 40 to accelerate the delivery of cold energy to the respective evaporators.

[0047] Figure 3a and Figure 3b Schematic configurations of the battery evaporator 40 of the temperature control system 100 according to different exemplary embodiments of the present disclosure are shown respectively.

[0048] For example, such as Figure 3a As shown, the battery evaporator 40 is constructed in the form of a cooling pipe extending through the battery pack 200. The low-temperature, low-pressure liquid refrigerant operates in the cooling pipe in a direct cooling manner, directly absorbing heat from the battery pack 200 and evaporating into a gaseous refrigerant. Specifically, the battery evaporator 40 is constructed as a cooling pipe with a bent orientation, thereby increasing the contact area with the battery pack 200 and thus enhancing the cooling effect of the battery evaporator 40. This configuration of the battery evaporator 40 allows for easy design and maintenance and achieves high cooling efficiency.

[0049] For example, such as Figure 3b As shown, the battery evaporator 40 is constructed as a heat exchanger and functions in a liquid-cooled manner together with the liquid-cooled circuit 42 flowing through the battery pack 200. In this circuit, the coolant absorbs heat as it flows through the battery pack 200, and the refrigerant in the battery evaporator 40 exchanges heat with the coolant to lower the coolant's temperature. Here, the coolant in the liquid-cooled circuit 42 is, for example, water. Furthermore, a circulation pump 43 is arranged in the liquid-cooled circuit 42, and the circulation pump 43 is configured to drive the coolant to circulate within the liquid-cooled circuit 42.

[0050] Figure 4 A schematic flowchart of a temperature control method for a vehicle according to an exemplary embodiment of the present disclosure is shown. Here, the temperature control method is implemented by a temperature control system 100 according to the present disclosure. The temperature control method according to the present disclosure includes at least the following steps:

[0051] S1: The temperature of the vehicle's battery pack 200 is detected by temperature sensor 70;

[0052] S2: The control unit 80 adjusts the valve opening of the three-way valve 60 of the temperature control system 100 according to the temperature of the battery pack, so as to control the ratio of refrigerant in the first refrigeration circuit L1 and the second refrigeration circuit L2 of the temperature control system 100.

[0053] For example, in step S2, the valve opening of the three-way valve 60 is adjusted such that the valve opening of the three-way valve 60 is proportional to the temperature and / or the rate of temperature change of the battery pack 200.

[0054] For example, in step S2, when the temperature of the battery pack 200 exceeds a temperature threshold, such as 55°C and / or the rate of change of the temperature of the battery pack 200 exceeds a rate of change threshold, such as 20°C / min, the valve opening of the three-way valve 60 is maximized and the refrigerant flows completely into the second refrigeration circuit L2.

[0055] Here, the control unit 80 has a computer program product according to the present disclosure, which includes a computer program that, when executed by one or more processors, enables the processors to perform a temperature control method according to the present disclosure.

[0056] The foregoing description of the embodiments is limited to the framework of the examples described herein. Of course, the various features of the embodiments can be freely combined with each other without departing from the framework of this disclosure, as long as it is technically meaningful.

[0057] Other advantages and alternative embodiments of this disclosure will be apparent to those skilled in the art. Therefore, this disclosure is not, in its broader sense, limited to the specific details, representative structures, and exemplary embodiments shown and described. Rather, those skilled in the art can make various modifications and substitutions without departing from the basic spirit and scope of this disclosure.

Claims

1. A temperature control system (100) for a vehicle, characterized in that, The temperature control system (100) includes at least: - A first refrigeration circuit (L1) having at least a compressor (10), a first condenser (21), a passenger compartment evaporator (30) and a battery evaporator (40), wherein the first refrigeration circuit (L1) includes a first branch (31) flowing through the passenger compartment evaporator (30) and a second branch (41) flowing through the battery evaporator (40). - A second refrigeration circuit (L2), which has at least the compressor (10), the second condenser (22) and the battery evaporator (40) connected in sequence. - Valve element (50) arranged between the first branch (31) and the second branch (41) in such a way that it is on for the refrigerant in the first refrigeration circuit (L1) and off for the refrigerant in the second refrigeration circuit (L2) to ensure that the refrigerant flowing in the first refrigeration circuit (L1) can flow through the crew compartment evaporator (30) and the battery evaporator (40) simultaneously, and the refrigerant flowing in the second refrigeration circuit (L2) flows completely through the battery evaporator (40), wherein the valve element (50) is configured as a one-way valve; - A three-way valve (60), the inlet (61) of which is connected to the compressor (10), the first outlet (62) of which is connected to the first condenser (21), and the second outlet (63) of which is connected to the second condenser (22), wherein the three-way valve (60) is configured to control the proportion of the refrigerant in the first refrigeration circuit and the second refrigeration circuit by adjusting the valve opening of the three-way valve (60); - A temperature sensor (70), the temperature sensor (70) being configured to detect the temperature of the battery pack (200) of the vehicle; and - Control unit (80), which is configured to adjust the valve opening of the three-way valve (60) according to the temperature of the battery pack (200).

2. The temperature control system (100) according to claim 1, characterized in that, The control unit (80) is configured such that the valve opening of the three-way valve (60) is proportional to the temperature and / or rate of temperature change of the battery pack (200); and / or The control unit (80) is communicatively connected to the temperature sensor (70) and the three-way valve (60).

3. The temperature control system (100) according to claim 1 or 2, characterized in that, The control unit (80) is configured to maximize the valve opening of the three-way valve (60) and allow the refrigerant to flow completely into the second refrigeration circuit when the temperature of the battery pack (200) exceeds a temperature threshold and / or the temperature change rate of the battery pack (200) exceeds a change rate threshold.

4. The temperature control system (100) according to claim 1 or 2, characterized in that, The crew compartment evaporator (30) is equipped with a first throttling element (91), which is configured as an expansion valve and is integrally integrated with the crew compartment evaporator (30); and / or The battery evaporator (40) is equipped with a second throttling element (92), which is configured as an expansion valve and is integrally integrated with the battery evaporator (40).

5. The temperature control system (100) according to claim 1 or 2, characterized in that, The battery evaporator (40) is constructed in the form of a cooling pipe extending through the battery pack (200) and operates in a direct cooling manner.

6. The temperature control system (100) according to claim 1 or 2, characterized in that, The battery evaporator (40) is constructed in the form of a heat exchanger and works in a liquid-cooled manner together with a liquid-cooled circuit (42) flowing through the battery pack (200), wherein a circulation pump (43) is arranged in the liquid-cooled circuit (42) and the circulation pump (43) is configured to drive the coolant to flow in the liquid-cooled circuit (42).

7. The temperature control system (100) according to claim 1 or 2, characterized in that, The temperature control system (100) includes a first shut-off valve (111) arranged upstream of the first condenser (21) in the first refrigeration circuit; and / or The temperature control system (100) includes a second shut-off valve (112) configured to shut off the first branch (31) when the occupant turns off the vehicle air conditioning; and / or The temperature control system (100) includes a third shut-off valve (113) configured to shut off the second branch (41) when the temperature of the battery pack (200) is below a lower limit.

8. The temperature control system (100) according to claim 1 or 2, characterized in that, The temperature control system (100) includes a liquid receiver (120) configured to store the refrigerant; and / or The temperature control system (100) includes at least one fan configured to dissipate heat from the first condenser (21) and / or the second condenser (22); and / or The temperature control system (100) includes a heating device configured to heat the refrigerant.

9. A temperature control method for a vehicle, characterized in that, The temperature control method is implemented by a temperature control system (100) according to any one of claims 1 to 8, and the temperature control method includes at least the following steps: S1: Detect the temperature of the vehicle's battery pack (200); S2: Adjust the valve opening of the three-way valve (60) of the temperature control system (100) according to the temperature of the battery pack (200) to control the ratio of refrigerant in the first and second refrigeration circuits of the temperature control system (100).

10. A computer program product comprising a computer program, characterized in that, When the computer program is executed by one or more processors, the processors are capable of performing the temperature control method according to any one of claims 9.

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