Power battery test system

Abstract

The utility model provides a power battery testing system. The power battery testing system comprises a compression separation system, a power battery testing system and a power battery testing system, the temperature adjusting system comprises a supercooling adjusting device and an overheating adjusting device; the regulating valve system comprises a first regulating valve assembly and a second regulating valve assembly; the controller is electrically connected with the compression separation system, the temperature adjusting system and the adjusting valve system; the power battery test system comprises a direct cooling mode and a direct heating mode. According to the embodiment of the utility model, the normal-temperature and normal-pressure refrigerant is obtained through the compressor and the condenser, and whether the liquid refrigerant or the gas refrigerant circulates or not is controlled through the first regulating valve assembly and the second regulating valve assembly; a controller is matched, so that the refrigerant meets different parameter requirements in a direct cooling mode or a direct heating mode, and a continuous and stable cold and heat source is provided for the battery pack.

Description

TECHNICAL FIELD

[0001] The utility model belongs to new energy detection technical field especially relates to a power battery test system. BACKGROUND

[0002] At present, new energy power battery test, all use cooling liquid to test namely glycol aqueous solution, this method test, through control cooling liquid enters the temperature, flow of the cold plate inside battery package, this test can provide the battery package with continuous and stable cold heat source, then, part of the vehicle factory proposes to combine the automobile air conditioning system and battery cooling system, therefore need to change the test method of power battery in prior art, design a test system suitable for new energy power battery. SUMMARY

[0003] To solve at least one technical problem in the prior art, the utility model embodiment provides a power battery test system, which can provide a battery pack with continuous and stable cold heat source. To achieve the above technical purpose, the utility model embodiment adopts the technical scheme of:

[0004] The utility model embodiment provides a power battery test system, which comprises:

[0005] A compression separation system, a temperature adjusting system, an evaporator, an adjusting valve system and a controller.

[0006] The compression separation system comprises a compressor and a condenser connected in sequence.

[0007] The temperature adjusting system comprises:

[0008] A supercooling adjusting device connected to the condenser,

[0009] A superheating adjusting device connected to the compressor,

[0010] An evaporator arranged between the supercooling adjusting device and the superheating adjusting device, the evaporator being used for connecting a battery pack.

[0011] The adjusting valve system comprises:

[0012] A first adjusting valve assembly arranged between the supercooling adjusting device and the evaporator, the first adjusting valve assembly comprising a first electronic expansion valve and a first electric ball valve.

[0013] A second adjusting valve assembly arranged between the superheating adjusting device and the evaporator, the second adjusting valve assembly comprising a second electronic expansion valve and a second electric ball valve.

[0014] The controller is electrically connected to the compression separation system, the temperature adjusting system and the adjusting valve system.

[0015] The power battery test system comprises a direct cooling mode and a direct heating mode,

[0016] When the first electronic expansion valve and the second electric ball valve are opened, and the first electric ball valve and the second electronic expansion valve are closed, the power battery test system enters the direct cooling mode.

[0017] When the first electronic expansion valve and the second electric ball valve are closed, and the first electric ball valve and the second electronic expansion valve are opened, the power battery test system enters the direct heating mode.

[0018] Further, the power battery test system further comprises a detection system, and the detection system comprises:

[0019] a pressure sensor for detecting the pressure of the refrigerant;

[0020] a temperature sensor for detecting the temperature of the refrigerant.

[0021] Further, the detection system comprises:

[0022] a first pressure sensor arranged between the condenser and the first regulating valve assembly, the first pressure sensor being used for detecting the valve-before pressure of the refrigerant before the first regulating valve assembly;

[0023] a first temperature sensor arranged between the condenser and the first regulating valve assembly, the first temperature sensor being used for detecting the valve-before temperature of the refrigerant before the first regulating valve assembly.

[0024] Further, the detection system further comprises:

[0025] a second pressure sensor arranged between the evaporator and the second regulating valve assembly, the second pressure sensor being used for detecting the outlet pressure of the refrigerant after passing through the battery pack;

[0026] a second temperature sensor arranged between the evaporator and the second regulating valve assembly, the second temperature sensor being used for detecting the outlet temperature of the refrigerant after passing through the battery pack.

[0027] Further, the detection system further comprises:

[0028] a third pressure sensor arranged between the first regulating valve assembly and the evaporator, the third pressure sensor being used for detecting the inlet pressure of the refrigerant before entering the battery pack;

[0029] a third temperature sensor arranged between the first regulating valve assembly and the evaporator, the third temperature sensor being used for detecting the inlet temperature of the refrigerant before entering the battery pack.

[0030] Further, the compression separation system further comprises an oil separator, which is arranged between the compressor and the condenser.

[0031] Further, a sight glass (6) is further included,

[0032] The second temperature sensor (522) is arranged between the second regulating valve assembly (42);

[0033] The third pressure sensor (513) is arranged between the first regulating valve assembly (41) and / or the sight glass (6).

[0034] Further, a dry filter is further included, which is arranged between the supercooling regulating device and the first regulating valve assembly.

[0035] Further, the detection system further comprises:

[0036] A fourth pressure sensor and a fourth temperature sensor are arranged between the compressor and the oil separator;

[0037] A fifth pressure sensor and a fifth temperature sensor are arranged between the compressor and the superheating regulating device.

[0038] A sixth pressure sensor and a sixth temperature sensor are arranged between the condenser and the supercooling regulating device.

[0039] The technical scheme provided by the embodiment of the utility model has the beneficial effects that:

[0040] In the power battery test system provided by the embodiment of the utility model, the compressor is used to convert gas into high-temperature and high-pressure gas, the condenser is used to convert the high-temperature and high-pressure refrigerant into normal-temperature and normal-pressure refrigerant, and the electronic expansion valve and the electric ball valve in the first regulating valve assembly and the second regulating valve assembly are used to control the flow or not of the liquid refrigerant or the gaseous refrigerant, the detection system is reasonably arranged, the controller is used to control the opening degree of the compressor, the condenser or the regulating valve system, the refrigerant can meet the different parameter requirements in the direct cooling mode or the direct heating mode, the design is reasonable, the use is convenient, and the battery pack can be provided with a continuous and stable cold and heat source. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 Fig. 1 is a structural schematic diagram of a power battery test system in the embodiment of the utility model. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the utility model clearer and more apparent, the utility model will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and not to limit the utility model.

[0043] In the description of the embodiments of the utility model, it should be explained that the directions or position relations indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like are based on the directions or position relations shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting or implying that the devices or elements indicated must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0044] In the description of the embodiments of the utility model, it should be explained that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication between two elements, it can be wireless connection, or it can be wired connection. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0045] In addition, the technical features involved in different embodiments of the utility model described below can be combined with each other as long as there is no conflict between them.

[0046] The utility model embodiment provides a kind of power battery test system, including compression separation system 1, temperature regulation system 2, evaporator 3, regulating valve system 4, controller;

[0047] Compression separation system 1, including compressor 11 and condenser 12 connected in sequence;

[0048] Temperature regulation system 2, the temperature regulation system 2 includes:

[0049] Supercooling regulating device 21 is connected to the condenser 12,

[0050] Superheating regulating device 22 is connected to the compressor 11,

[0051] Evaporator 3 is arranged between the supercooling regulating device 21 and the superheating regulating device 22, and the evaporator 3 is used to connect battery pack;

[0052] Regulating valve system 4 includes:

[0053] A first regulating valve assembly 41 is arranged between the supercooling regulating device 21 and the evaporator 3, and includes a first electronic expansion valve 411 and a first electric ball valve 412.

[0054] A second regulating valve assembly 42 is arranged between the superheating regulating device 22 and the evaporator 3, and includes a second electronic expansion valve 421 and a second electric ball valve 422.

[0055] A controller is electrically connected to the compression separation system 1, the temperature regulating system 2 and the regulating valve system 4.

[0056] The power battery testing system includes a direct cooling mode and a direct heating mode.

[0057] When the first electronic expansion valve 411 and the second electric ball valve 422 are opened, and the first electric ball valve 412 and the second electronic expansion valve 421 are closed, the power battery testing system enters the direct cooling mode.

[0058] When the first electronic expansion valve 411 and the second electric ball valve 422 are closed, and the first electric ball valve 412 and the second electronic expansion valve 421 are opened, the power battery testing system enters the direct heating mode.

[0059] In a specific embodiment, as shown in Figure 1 In the power battery testing system, the compressor 11 converts gas into high-temperature and high-pressure gas. The first electronic expansion valve 411 and the second electronic expansion valve 421 allow liquid refrigerant to pass through, and the first electric ball valve 412 and the second electric ball valve 422 allow gaseous direct cooling agent to pass through.

[0060] In the direct cooling mode, the high-temperature and high-pressure gas from the compressor 11 enters the condenser 12, which condenses the high-temperature and high-pressure gas stream into liquid refrigerant at normal temperature and high pressure. The liquid refrigerant passes through the supercooling adjusting device 21 and exchanges heat with the medium in the supercooling adjusting device 21. The supercooling adjusting device 21 can increase or decrease the temperature of the liquid refrigerant to meet the parameter requirements in the direct cooling mode. Since the first electronic expansion valve 411 in the first adjusting valve assembly 41 is open and the first electric ball valve 412 is closed, the liquid refrigerant flowing out of the condenser 12 can pass through the first adjusting valve assembly 41, be throttled and reduced in pressure to form low-temperature and low-pressure liquid refrigerant, and enter the battery pack connected with the evaporator 3 to take out the heat generated by charging and discharging the battery pack to achieve the cooling effect. At the same time, the liquid refrigerant becomes gaseous refrigerant flowing out of the battery pack. Since the second electric ball valve 422 in the second adjusting valve assembly 42 is open and the second electronic expansion valve 421 is closed, the gaseous refrigerant can pass through the second adjusting valve assembly 42 and form liquid refrigerant after passing through the superheating adjusting device 22, and then re-enter the compressor 11 for circulation.

[0061] In the direct cooling mode, the condenser 12 does not work. Since the first electronic expansion valve 411 in the first adjusting valve assembly 41 is closed and the first electric ball valve 412 is open, the high-temperature and high-pressure gas from the compressor 11 does not pass through the condenser 12, but directly passes through the supercooling adjusting device 21 and the first adjusting valve assembly 41, and enters the battery pack connected with the evaporator 3 to exchange heat with the medium in the battery pack, thereby achieving the effect of warming up the battery pack. At the same time, the gaseous refrigerant condenses into liquid refrigerant and flows out of the battery pack. Since the second electric ball valve 422 in the second adjusting valve assembly 42 is closed and the second electronic expansion valve 421 is open, the liquid refrigerant can pass through the second adjusting valve assembly 42 and then pass through the superheating adjusting device 22 to re-enter the compressor 11 for circulation.

[0062] Further, the power battery test system further comprises a detection system, and the detection system comprises:

[0063] a pressure sensor for detecting the pressure of the refrigerant;

[0064] a temperature sensor for detecting the temperature of the refrigerant.

[0065] It should be noted that the power battery testing system requires different parameter requirements in different modes. Specifically, when the power battery testing system is in direct cooling mode, the pressure before the direct cooling valve, the direct cooling subcooling, the battery pack outlet pressure, and the direct cooling superheat must sequentially meet the usage requirements. When the power battery testing system is in direct heating mode, the battery pack inlet pressure, the direct heating superheat, and the direct heating subcooling must sequentially meet the usage requirements. The detection system monitors the temperature and pressure of the refrigerant, and the controller adjusts different components to ensure that the power battery testing system provides a continuous and stable source of heat and cold to the battery pack.

[0066] Furthermore, the detection system includes:

[0067] A first pressure sensor 511 is disposed between the condenser 12 and the first regulating valve assembly 41. The first pressure sensor 511 is used to detect the pressure of the refrigerant before the valve in front of the first regulating valve assembly 41.

[0068] A first temperature sensor 521 is disposed between the condenser 12 and the first regulating valve assembly 41. The first temperature sensor 521 is used to detect the inlet temperature of the refrigerant before the first regulating valve assembly 41.

[0069] In direct cooling mode, such as Figure 1 As shown, since the first pressure sensor 511 is located before the first regulating valve assembly 41, it can collect the pressure of the refrigerant before the first regulating valve assembly 41, i.e., the inlet pressure. When the inlet pressure does not meet the usage requirements, the controller adjusts the fan speed of the compressor 11 so that the inlet pressure collected by the first pressure sensor 511 meets the usage requirements. Similarly, the first temperature sensor 521 can collect the temperature of the refrigerant before the first regulating valve assembly 41, i.e., the inlet temperature. It should be noted that any inlet pressure corresponds to a saturation temperature, and the difference between the saturation temperature corresponding to the inlet pressure and the inlet temperature is the direct cooling subcooling degree in the direct cooling mode. When the direct cooling subcooling degree does not meet the usage requirements, the controller calculates and adjusts the subcooling adjustment device 21, and then adjusts the inlet temperature collected by the first temperature sensor 521, so that the direct cooling subcooling degree meets the usage requirements.

[0070] Therefore, during operation, firstly, the pressure before the valve of the liquid refrigerant is made to meet the usage requirements through the first pressure sensor 511 and the compressor 11. Then, the temperature before the valve is calculated according to the usage requirements of direct cooling subcooling. Finally, the appropriate temperature before the valve of the liquid refrigerant is adjusted through the first temperature sensor 521 and the subcooling adjustment device 21.

[0071] Furthermore, the detection system also includes:

[0072] The second pressure sensor 512 is located between the evaporator 3 and the second regulating valve assembly 42. The second pressure sensor 512 is used to detect the outlet pressure of the refrigerant after it passes through the battery pack.

[0073] The second temperature sensor 522 is located between the evaporator 3 and the second regulating valve assembly 42. The second temperature sensor 522 is used to detect the outlet temperature of the refrigerant after it passes through the battery pack.

[0074] In direct cooling mode, such as Figure 1 As shown, the second pressure sensor 512 collects the outlet pressure of the refrigerant after passing through the battery pack, i.e., the battery pack outlet pressure. When the battery pack outlet pressure does not meet the usage requirements, the controller calculates and adjusts the opening of the first electronic expansion valve 411 in the first regulating valve assembly 41 so that the battery pack outlet pressure meets the usage requirements. Similarly, the second temperature sensor 522 collects the outlet temperature of the refrigerant after passing through the battery pack, i.e., the battery pack outlet temperature. It should be noted that any battery pack outlet pressure corresponds to a battery pack outlet saturation temperature. The difference between the battery pack outlet saturation temperature and the battery pack outlet temperature corresponding to the battery pack outlet pressure is the direct cooling superheat in the direct cooling mode. When the direct cooling superheat does not meet the usage requirements, the controller calculates and adjusts the fan speed of the compressor 11, thereby adjusting the battery pack outlet temperature and making the direct cooling superheat meet the usage requirements.

[0075] Therefore, during operation, the battery pack outlet pressure is first made to meet the usage requirements through the second pressure sensor 512 and the first electronic expansion valve 411. Then, the battery pack outlet temperature is calculated according to the usage requirements of direct cooling superheat. Finally, the appropriate battery pack outlet temperature is adjusted through the second temperature sensor 522 and the compressor 11.

[0076] Furthermore, the detection system also includes:

[0077] The third pressure sensor 513 is located between the first regulating valve assembly 41 and the evaporator 3. The third pressure sensor 513 is used to detect the inlet pressure of the refrigerant before it enters the battery pack.

[0078] The third temperature sensor 523 is located between the first regulating valve assembly 41 and the evaporator 3. The third temperature sensor 523 is used to detect the inlet temperature of the refrigerant before it enters the battery pack.

[0079] In direct heating mode, such as Figure 1As shown, the third pressure sensor 513 collects the inlet pressure of the refrigerant before entering the battery pack, i.e. the battery pack inlet pressure, and when the battery pack inlet pressure does not meet the use requirement, the controller calculates and adjusts the air speed of the condenser 12 to make the battery pack inlet pressure meet the use requirement; Similarly, the third temperature sensor 523 collects the inlet temperature of the refrigerant before entering the battery pack, i.e. the battery pack inlet temperature, and it needs to be explained that any battery pack inlet pressure corresponds to a battery pack inlet saturation temperature, and the difference between the battery pack inlet saturation temperature corresponding to the battery pack inlet pressure and the battery pack inlet temperature is the direct heating superheat degree in the direct heating mode, and when the direct heating superheat degree does not meet the use requirement, the controller calculates and adjusts the supercooling adjusting device 21, and then adjusts the battery pack inlet temperature, and makes the direct heating superheat degree meet the use requirement; At the same time, the difference between the battery pack inlet saturation temperature corresponding to the battery pack inlet pressure and the battery pack outlet temperature is the direct heating subcooling degree in the direct heating mode, and when the direct heating subcooling degree does not meet the use requirement, the controller calculates and adjusts the fan speed of the compressor 11, and then adjusts the battery pack outlet temperature, and makes the direct heating subcooling degree meet the use requirement.

[0080] Therefore, during work, first, the battery pack inlet pressure meets the use requirement through the third pressure sensor 513 and the condenser 12, then the battery pack inlet temperature is calculated according to the use requirement of the direct heating superheat degree, then the appropriate battery pack inlet temperature is adjusted through the third temperature sensor 523 and the supercooling adjusting device 21, finally, the battery pack outlet temperature is calculated according to the use requirement of the direct heating subcooling degree, and then the appropriate battery pack outlet temperature is adjusted through the third temperature sensor 523 and the compressor 11.

[0081] Further, the compression separation system 1 further comprises an oil separator 13, which is arranged between the compressor 11 and the condenser 12, and the oil separator 13 can remove impurities in the gaseous refrigerant flowing out of the compressor 11.

[0082] Further, it further comprises a sight glass 6,

[0083] The second temperature sensor 522 and the second adjusting valve assembly 42;

[0084] And / or, the third pressure sensor 513 and the first adjusting valve assembly 41 are provided with the sight glass 6, and the sight glass 6 can observe the flow of the refrigerant.

[0085] Further, it further comprises a drying filter 7, which is arranged between the supercooling adjusting device 21 and the first adjusting valve assembly 41. In the direct heating mode, the drying filter 7 can remove water in the gaseous refrigerant flowing out of the compressor.

[0086] Furthermore, the detection system also includes:

[0087] The fourth pressure sensor 514 and the fourth temperature sensor 524 are located between the compressor 11 and the oil separator 13;

[0088] And / or, the fifth pressure sensor 515 and the fifth temperature sensor 525 are located between the compressor 11 and the overheat regulating device 22;

[0089] And / or, a sixth pressure sensor 516 and a sixth temperature sensor 526 are provided in the condenser 12 and the subcooling regulating device 21.

[0090] Understandable, such as Figure 1 As shown, the fourth pressure sensor 514 can detect the pressure of the refrigerant flowing out of the compressor 11, the fourth temperature sensor 524 can detect the temperature of the refrigerant flowing out of the compressor 11, the fifth pressure sensor 515 can detect the pressure of the refrigerant entering the compressor 11, the fifth temperature sensor 525 can detect the temperature of the refrigerant entering the compressor 11, the sixth pressure sensor 516 can detect the pressure of the refrigerant flowing out of the condenser 12, and the sixth temperature sensor 526 can detect the temperature of the refrigerant flowing out of the condenser 12.

[0091] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A power cell testing system, characterized by, Comprise: A compression separation system (1), a temperature regulation system (2), an evaporator (3), a regulating valve system (4), a controller; The compression separation system (1) comprises a compressor (11) and a condenser (12) connected in sequence; The temperature regulation system (2) comprises: A supercooling regulation device (21) connected to the condenser (12), A superheating regulation device (22) connected to the compressor (11), An evaporator (3) provided between the supercooling regulation device (21) and the superheating regulation device (22), the evaporator (3) is used for connecting a battery pack; The regulating valve system (4) comprises: A first regulating valve assembly (41) provided between the supercooling regulation device (21) and the evaporator (3), the first regulating valve assembly (41) comprises a first electronic expansion valve (411) and a first electric ball valve (412); A second regulating valve assembly (42) provided between the superheating regulation device (22) and the evaporator (3), the second regulating valve assembly comprises a second electronic expansion valve (421) and a second electric ball valve (422); The controller is electrically connected with the compression separation system (1), the temperature regulation system (2) and the regulating valve system (4); The power battery test system comprises a direct cooling mode and a direct heating mode, When the first electronic expansion valve (411) and the second electric ball valve (422) are opened, and the first electric ball valve (412) and the second electronic expansion valve (421) are closed, the power battery test system enters the direct cooling mode; When the first electronic expansion valve (411) and the second electric ball valve (422) are closed, and the first electric ball valve (412) and the second electronic expansion valve (421) are opened, the power battery test system enters the direct heating mode.

2. The power battery test system according to claim 1, wherein The power battery test system further comprises a detection system, and the detection system comprises: A pressure sensor for detecting the pressure of the refrigerant; A temperature sensor for detecting the temperature of the refrigerant.

3. The power battery test system according to claim 2, wherein The detection system comprises: A first pressure sensor (511) provided between the condenser (12) and the first regulating valve assembly (41), the first pressure sensor (511) is used for detecting the pre-valve pressure of the refrigerant before the first regulating valve assembly (41); A first temperature sensor (521) provided between the condenser (12) and the first regulating valve assembly (41), the first temperature sensor (521) is used for detecting the pre-valve temperature of the refrigerant before the first regulating valve assembly (41).

4. The power battery test system according to claim 3, wherein The detection system further comprises: A second pressure sensor (512) provided between the evaporator (3) and the second regulating valve assembly (42), the second pressure sensor (512) is used for detecting the outlet pressure of the refrigerant after passing through the battery pack; A second temperature sensor (522) is arranged between the evaporator (3) and the second regulating valve assembly (42), and is used to detect the outlet temperature of the refrigerant after passing through the battery pack.

5. The power battery test system of claim 4, wherein, The detection system further comprises: A third pressure sensor (513) is arranged between the first regulating valve assembly (41) and the evaporator (3), and is used to detect the inlet pressure of the refrigerant before entering the battery pack. A third temperature sensor (523) is arranged between the first regulating valve assembly (41) and the evaporator (3), and is used to detect the inlet temperature of the refrigerant before entering the battery pack.

6. The power battery test system of claim 5, wherein, The compression separation system (1) further comprises an oil separator (13) arranged between the compressor (11) and the condenser (12).

7. The power battery test system of claim 5, wherein, Further comprising a sight glass (6), The second temperature sensor (522) and the second regulating valve assembly (42) are arranged with the sight glass (6). And / or, the third pressure sensor (513) and the first regulating valve assembly (41) are arranged with the sight glass (6).

8. The power battery test system of claim 1, wherein, Further comprising a drying filter (7) arranged between the subcooling device (21) and the first regulating valve assembly (41).

9. The power battery test system of claim 6, wherein, The detection system further comprises: A fourth pressure sensor (514) and a fourth temperature sensor (524) are arranged between the compressor (11) and the oil separator (13). And / or, a fifth pressure sensor (515) and a fifth temperature sensor (525) are arranged between the compressor (11) and the superheating device (22). And / or, a sixth pressure sensor (516) and a sixth temperature sensor (526) are arranged between the condenser (12) and the subcooling device (21).

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