A new energy automobile direct-cooling battery pack measurement and control system

Abstract

The present application relates to the technical field of new energy vehicles, and particularly relates to a new energy vehicle direct-cooling battery pack measurement and control system, which comprises: a refrigeration cycle, a direct-cooling cycle and an evaporation cycle; the main circulation path of the refrigeration cycle comprises: a compressor B, an oil separator B, a condenser B, a liquid storage tank B, a drying filter B, a refrigeration plate exchanger and a gas separator B connected in sequence in a closed loop, and the refrigeration plate exchanger is further provided with a refrigerant tank B in communication; the main circulation path of the direct-cooling cycle comprises: a compressor A, an oil separator A, a condenser A, a liquid storage tank A, a supercooling plate exchanger, a temporary storage tank, a drying filter A, a direct-cooling plate and a gas separator A; the main circulation path of the evaporation cycle comprises: an evaporation pump, an evaporation plate exchanger and a refrigerant tank A connected in sequence in a closed loop; the evaporation plate exchanger is in parallel communication with the direct-cooling plate; and the system further comprises a control mechanism. The new energy vehicle direct-cooling battery pack measurement and control system is suitable for various vehicle models and has strong compatibility.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicle technology, and in particular to a measurement and control system for a direct-cooled battery pack for new energy vehicles. Background Technology

[0002] To address the increasingly serious problems of global warming, air pollution, and soaring energy costs, the vigorous development of new energy vehicles has become a global consensus. New energy vehicles, with their advantages of low emissions, good economic efficiency, and independence from petroleum resources, have become an important development direction in the automotive industry. Among these, the power battery, a core component of new energy vehicles, has a significant impact on their performance and lifespan. Power batteries generate a large amount of heat during operation. If thermal management is not effective, it can lead to increased battery temperature, performance degradation, and even damage; in more serious cases, spontaneous combustion. Therefore, thermal management technology has become one of the key technologies in the new energy vehicle field.

[0003] Currently, power battery cooling methods include natural cooling, air cooling, liquid cooling, and direct cooling. Among them, direct cooling technology utilizes the absorption of a large amount of heat by the coolant during the gas-liquid phase change process to achieve efficient heat exchange. The thermal management system of power batteries is gradually shifting from natural cooling, air cooling, and liquid cooling towards direct cooling. However, the development of conventional direct cooling technology for power batteries is mainly based on independent experiments and is separate from other vehicle systems, resulting in poor compatibility and inability to adapt to various vehicle models. Summary of the Invention

[0004] To address the technical problems existing in the background art, the present invention provides a direct-cooling battery pack monitoring and control system for new energy vehicles, which is adaptable to various vehicle models and has strong compatibility.

[0005] The technical solution adopted by this invention is:

[0006] A monitoring and control system for a direct-cooled battery pack in a new energy vehicle includes: a refrigeration cycle, a direct-cooling cycle, and an evaporation cycle.

[0007] The main loop route of the refrigeration cycle includes:

[0008] The compressor B, oil separator B, condenser B, liquid receiver B, dryer filter B, refrigeration plate heat exchanger, and gas separator B are connected in a closed loop in sequence.

[0009] The refrigeration plate heat exchanger is also connected to a refrigerant tank B, and a circulation pump and a subcooling plate heat exchanger are sequentially connected in a closed loop to the refrigerant tank B.

[0010] The main loop route of the direct cooling cycle includes:

[0011] Compressor A, oil separator A, condenser A, liquid receiver A, subcooling plate heat exchanger, temporary storage tank, dryer filter A, direct cooling plate, gas separator A.

[0012] The main loop route of the evaporation cycle includes:

[0013] The evaporator pump, evaporator heat exchanger, and refrigerant tank A are connected in a closed loop in sequence.

[0014] The evaporator plate is connected in parallel with the direct cooling plate.

[0015] It also includes: control mechanisms.

[0016] Furthermore, the refrigeration cycle also includes:

[0017] A pressure controller that is connected in parallel to oil separator B, compressor B, and gas separator B;

[0018] A bypass branch B is connected in parallel to condenser B, liquid storage tank B, and dryer filter B;

[0019] A refrigerant branch connected to the refrigerant side of the refrigeration plate heat exchanger, the refrigerant branch being used to connect to refrigerant tank B.

[0020] Furthermore, a bypass silencer is connected to the bypass branch B.

[0021] Furthermore, the direct cooling cycle also includes:

[0022] Capillary branches, intake / recharge branches, separation branches, and return branches are connected by the same common terminal;

[0023] The capillary branch and the suction / make-up gas branch are connected in parallel to the condenser A and the liquid storage tank A;

[0024] The capillary branch and the separation branch are connected in parallel to the condenser A, the liquid storage tank A, the subcooling plate heat exchanger, the temporary storage tank, and the dryer filter A;

[0025] The capillary branch and the return gas branch are connected in parallel to the oil separator A, compressor A, and gas separator A;

[0026] The intake and supply gas branch and the separation branch are connected in parallel to the subcooled plate heat exchanger, temporary storage tank, and dryer filter A;

[0027] The intake gas supply branch and the return gas branch are connected in parallel to the subcooled plate heat exchanger, temporary storage tank, dryer filter A, and direct cooling plate;

[0028] The separate branch and the return gas branch are connected in parallel to the direct cooling plate;

[0029] A cold liquid supply branch connected in parallel to the temporary storage tank;

[0030] Connect the direct cooling branch line installed on the inlet pipe of the direct cooling plate.

[0031] Furthermore, a capillary tube is connected to the capillary branch.

[0032] Furthermore, the evaporator plate is connected to the common end of the connecting pipe of the direct cooling plate, the gas separator A, the capillary branch, the suction and replenishment gas branch, and the separation branch.

[0033] Furthermore, the evaporation cycle also includes:

[0034] A bypass branch A is connected to the refrigerant exchange side of the evaporator plate, and the bypass branch A is used for the refrigerant tank A.

[0035] Furthermore, a heater A is installed inside the refrigerant tank A;

[0036] A heater B is installed inside the refrigerant tank B.

[0037] Furthermore, the control mechanism includes:

[0038] The rectifier module is powered by an input circuit breaker, and the control unit is powered by a switching power supply and communicates with a card reader. The rectifier module and the control unit are electrically connected to a charging gun, which is used to supply power to the battery pack, collect system parameters, and send control signals.

[0039] Furthermore, the compressor B, circulating pump, compressor A, evaporator pump, heater A, and heater B are electrically connected to the control unit via a charging gun.

[0040] The advantages of the direct-cooling battery pack monitoring and control system for new energy vehicles of the present invention are as follows:

[0041] 1. By using parallel adsorption devices, the amount of adsorbed gas can be increased;

[0042] 2. Improve the quality of the adsorbed gas by using adsorption equipment connected in series. Attached Figure Description

[0043] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings required for the specific embodiments will be briefly introduced below. The accompanying drawings in the following description are embodiments of the present invention.

[0044] Figure 1 This invention provides a schematic diagram of the overall process flow for a direct-cooling battery pack testing and control system for new energy vehicles.

[0045] Figure 2 This invention provides a schematic diagram of the refrigeration cycle process of a direct-cooling battery pack testing and control system for new energy vehicles.

[0046] Figure 3This invention provides a schematic diagram of the direct cooling cycle and evaporation cycle process of a direct-cooling battery pack testing and control system for new energy vehicles.

[0047] Figure 4 This invention provides a schematic diagram of the evaporation cycle process of a direct-cooling battery pack monitoring and control system for new energy vehicles.

[0048] Figure 5 This is a schematic diagram of the overall process of a direct-cooled battery pack testing and control system for new energy vehicles, provided by an example of the present invention.

[0049] In the picture:

[0050] 1. Refrigeration cycle,

[0051] 101. Compressor B; 102. Oil separator B; 103. Condenser B; 104. Receiver B; 105. Dryer filter B; 106. Refrigeration heat exchanger; 107. Gas separator B; 108. Bypass silencer; 109. Refrigerant tank B; 110. Circulation pump; 111. Pressure controller.

[0052] 11. Bypass branch B, 12. Refrigerant branch,

[0053] 2. Direct cooling circulation,

[0054] 201. Compressor A; 202. Oil separator A; 203. Condenser A; 204. Liquid receiver A; 205. Dryer filter A; 206. Gas separator A; 207. Capillary tube; 208. Temporary storage tank.

[0055] 21. Capillary branch; 22. Suction / make-up gas branch; 23. Cooling liquid supply branch; 24. Separation branch; 25. Direct cooling branch; 26. Return gas branch.

[0056] 3. Evaporation cycle,

[0057] 301. Evaporator pump; 302. Refrigerant tank A.

[0058] 31. Bypass branch road A,

[0059] 41. Replace the subcooling plate; 42. Replace the evaporator plate; 43. Replace the direct cooling plate. Detailed Implementation

[0060] To more clearly and explicitly illustrate the specific objectives and implementation methods of this invention, a complete description of the technical solution of this invention will be provided below. The described embodiments are only a part of the embodiments of this invention, not all of them. Without creative effort, all other embodiments based on the embodiments described in this invention are within the protection scope of this invention.

[0061] This invention provides a measurement and control system for a direct-cooled battery pack in a new energy vehicle, such as... Figure 1 As shown, it includes:

[0062] Refrigeration cycle 1. Direct cooling cycle 2. Evaporation cycle 3. Control mechanism.

[0063] The main loop route of the refrigeration cycle 1 is as follows: Figure 2 As shown, it includes:

[0064] The compressor B 101, oil separator B 102, condenser B 103, liquid receiver B 104, dryer filter B 105, heat exchanger 106, and gas separator B 107 are connected in a closed loop in sequence. A refrigerant tank B 109 is also connected to the heat exchanger 106. A heater B is installed in the refrigerant tank B 109. A circulation pump 110 and a subcooling heat exchanger 41 are also connected in a closed loop in sequence to the refrigerant tank B 109.

[0065] Refrigeration cycle 1, such as Figure 2 As shown, it also includes:

[0066] A pressure controller 111 is connected in parallel to oil separator B 102, compressor B 101, and gas separator B 107; a bypass branch B 11 is connected in parallel to condenser B 103, liquid receiver B 104, and dryer filter B 105, and a bypass silencer 108 is connected to the bypass branch B 11; a refrigerant branch 12 is connected to the refrigerant side of refrigeration plate heat exchanger 106, and the refrigerant branch 12 is used to connect to refrigerant tank B 109.

[0067] The main loop route of the direct cooling cycle 2 is as follows: Figure 3 As shown, it includes:

[0068] Compressor A201, oil separator A202, condenser A203, liquid receiver A204, subcooling plate heat exchanger 41, temporary storage tank 208, dryer filter A205, direct cooling plate 43, gas separator A206.

[0069] Direct cooling cycle 2, such as Figure 3 As shown, it also includes:

[0070] The capillary branch 21, the intake gas branch 22, the separation branch 24, and the return gas branch 26 are connected by the same common terminal; the capillary branch 21 and the intake gas branch 22 are connected in parallel to the condenser A 203 and the liquid receiver A 204; the capillary branch 21 and the separation branch 24 are connected in parallel to the condenser A 203, the liquid receiver A 204, the subcooling plate heat exchanger 41, the temporary storage tank 208, and the dryer filter A 205; the capillary branch 21 and the return gas branch 26 are connected in parallel to the oil separator A 202, the compressor A 201, and the gas separator A 206; the intake gas branch 22 and the separation branch 24 are connected in parallel to the subcooling plate heat exchanger 41, the temporary storage tank 208, and the dryer filter A 205; the intake gas branch 22 and the return gas branch 26 are connected in parallel to the subcooling plate heat exchanger 41, the temporary storage tank 208, and the dryer filter A 205. 205. On the direct cooling plate 43; the separation branch 24 and the return gas branch 26 are connected in parallel to the direct cooling plate 43; the cold liquid supply branch 23 is connected in parallel to the temporary storage tank 208; and the direct cooling branch 25 is connected to the inlet pipe of the direct cooling plate 43.

[0071] A capillary tube 207 is connected to the capillary branch 21. The evaporator plate heat exchanger 42 is connected to the common end of the connecting pipe of the direct cooling plate 43, the gas separator A 206, the capillary branch 21, the suction and makeup gas branch 22, and the separation branch 24. The evaporator plate heat exchanger 42 and the direct cooling plate 43 are connected in parallel.

[0072] The main loop route of the evaporation cycle 3 is as follows: Figure 3 , Figure 4 As shown, it includes:

[0073] An evaporator pump 301, an evaporator plate heat exchanger 42, and a refrigerant tank A 302 are connected in a closed loop in sequence. A heater A is installed inside the refrigerant tank A 302.

[0074] Evaporation cycle 3, such as Figure 3 , Figure 4 As shown, it also includes:

[0075] A bypass branch A 31 is connected to the refrigerant side of the evaporator plate heat exchanger 42, and the bypass branch A 31 is used for the refrigerant tank A 302.

[0076] The control mechanism includes:

[0077] The rectifier module, powered by an input circuit breaker, and the control unit, powered by a switching power supply and communicatively connected to a card reader, are electrically connected to the rectifier module and the control unit. A charging gun is provided for supplying power to the battery pack, acquiring system parameters, and sending control signals. Compressor B101, circulating pump 110, compressor A 201, evaporator pump 301, heater A, and heater B are electrically connected to the control unit via the charging gun.

[0078] Based on the specific structure of the direct-cooling battery pack monitoring and control system for new energy vehicles in the above embodiments, the operation method of the direct-cooling system, as shown in Figure 5, will be further explained below:

[0079] Condenser A 203 performs primary condensation to stabilize system pressure;

[0080] The liquid storage tank A 204 stores liquid refrigerant to provide sufficient liquid refrigerant for the direct cooling system.

[0081] The subcooling plate is replaced with a secondary condenser at 41 to achieve the preset subcooling degree;

[0082] The gaseous refrigerant in the filter pipeline of temporary storage tank 208 reduces the fluctuation of liquid refrigerant entering the mass flow meter.

[0083] The stepper electronic expansion valve on the inlet pipe of the direct cooling plate 43 adjusts the inlet subcooling of the direct cooling plate 43;

[0084] The electronic expansion valve for regulating evaporation pressure on the outlet pipe of the direct cooling plate 43 regulates the outlet pressure of the direct cooling plate 43 and controls the outlet superheat of the direct cooling plate 43.

[0085] After the direct cooling plate 43 absorbs the heat generated by the battery pack, when the refrigerant in the direct cooling plate 43 is in a gas-liquid mixed state, it enters the evaporator plate 42 through the return gas solenoid valve A on the return gas branch 26 for secondary evaporation.

[0086] After the direct cooling plate 43 absorbs the heat generated by the battery pack, the refrigerant in the direct cooling plate 43 is in a gaseous state and returns to the compressor A 201 via the return gas solenoid valve B on the gas separator A206 and the return gas branch 26 connecting pipeline.

[0087] Capillary branch 21 works in conjunction with condenser A 203 to stabilize system pressure;

[0088] The suction and replenishment gas stepping electronic expansion valve on the suction and replenishment gas branch 22 replenishes gas to compressor A 201 in advance, thereby increasing the suction pressure;

[0089] The cold supply branch 23 bypasses the temporary storage tank 208, and is directly metered by a mass flow meter;

[0090] The mass flow meter bypasses branch 24 and does not perform metering if it does not pass through the direct cooling plate 43;

[0091] The direct-cooling stepping electronic expansion valve on the separation branch 24 adjusts the inlet subcooling of the evaporator plate heat exchanger 42.

[0092] Based on the above, and inspired by an embodiment of the direct-cooling battery pack monitoring and control system for new energy vehicles of the present invention, those skilled in the art can make various changes and modifications without departing from the technical concept of the present invention.

Claims

1. A monitoring and control system for a direct-cooled battery pack in a new energy vehicle, characterized in that: include: Refrigeration cycle (1), direct cooling cycle (2), evaporation cycle (3); The main loop route of the refrigeration cycle (1) includes: The compressor B (101), oil separator B (102), condenser B (103), liquid receiver B (104), dryer filter B (105), refrigeration heat exchanger (106), and gas separator B (107) are connected in a closed loop in sequence; a refrigerant tank B (109) is also connected to the refrigeration heat exchanger (106), and a circulation pump (110) and a subcooling heat exchanger (41) are connected in a closed loop in sequence to the refrigerant tank B (109). The main loop route of the direct cooling cycle (2) includes: Compressor A (201), oil separator A (202), condenser A (203), liquid receiver A (204), subcooling plate heat exchanger (41), temporary storage tank (208), dryer filter A (205), direct cooling plate (43), gas separator A (206); The main loop route of the evaporation cycle (3) includes: An evaporator pump (301), an evaporator heat exchanger (42), and a refrigerant tank A (302) are connected in a closed loop in sequence. The refrigerant side of the evaporator heat exchanger (42) is connected to a bypass branch A (31) that is connected to the refrigerant tank A (302). The evaporator plate (42) is connected in parallel with the direct cooling plate (43); The direct cooling cycle (2) also includes: The capillary branch (21), the intake gas branch (22), the separation branch (24), and the return gas branch (26) are connected by the same common end; the capillary branch (21) and the intake gas branch (22) are connected in parallel to the condenser A (203) and the liquid storage tank A (204); the capillary branch (21) and the separation branch (24) are connected in parallel to the condenser A (203), the liquid storage tank A (204), the subcooling plate heat exchanger (41), the temporary storage tank (208), and the dryer filter A (205); the capillary branch (21) and the return gas branch (26) are connected in parallel to the oil separator A (202), the compressor A (201), and the gas separator A (206); the intake gas branch (22) and the separation branch (24) are connected in parallel to the subcooling plate heat exchanger (41) and the temporary storage tank (208). 208), on the dryer filter A (205); the intake gas branch (22) and return gas branch (26) are connected in parallel to the subcooled plate heat exchanger (41), the temporary storage tank (208), the dryer filter A (205), and the direct cooling plate (43); the separation branch (24) and return gas branch (26) are connected in parallel to the direct cooling plate (43); the cold liquid supply branch (23) is connected in parallel to the temporary storage tank (208); the direct cooling branch (25) is connected to the inlet pipe of the direct cooling plate (43); the capillary branch (21) is connected to the capillary tube (207); the evaporator plate heat exchanger (42) is connected to the common end of the connecting pipe of the direct cooling plate (43), the gas separator A (206), the capillary branch (21), the intake gas branch (22), and the separation branch (24); It also includes: control mechanisms.

2. The new energy vehicle direct-cooled battery pack monitoring and control system according to claim 1, characterized in that: The refrigeration cycle (1) further includes: A pressure controller (111) is connected in parallel to oil separator B (102), compressor B (101), and gas separator B (107). A bypass branch B (11) is connected in parallel to condenser B (103), liquid storage tank B (104), and dryer filter B (105). A refrigerant branch (12) connected to the refrigerant side of the refrigerant heat exchanger (106) is provided, and the refrigerant branch (12) is used to connect to the refrigerant tank B (109).

3. The new energy vehicle direct-cooled battery pack monitoring and control system according to claim 2, characterized in that: A bypass silencer (108) is connected to the bypass branch B (11).

4. The new energy vehicle direct-cooled battery pack monitoring and control system according to claim 1, characterized in that: A heater A is installed inside the refrigerant tank A (302); A heater B is installed inside the refrigerant tank B (109).

5. The new energy vehicle direct-cooled battery pack monitoring and control system according to claim 4, characterized in that: The control mechanism includes: The rectifier module is powered by an input circuit breaker, and the control unit is powered by a switching power supply and communicates with a card reader. The rectifier module and the control unit are electrically connected to a charging gun, which is used to supply power to the battery pack, collect system parameters, and send control signals.

6. The new energy vehicle direct-cooled battery pack monitoring and control system according to claim 5, characterized in that: The compressor B (101), circulation pump (110), compressor A (201), evaporator pump (301), heater A, and heater B are electrically connected to the control unit via a charging gun.

Images