Direct-cooling battery pack measurement and control system of new energy automobile

Abstract

The invention relates to the technical field of new energy automobiles, in particular to a new energy automobile direct cooling type battery pack measurement and control system which comprises a refrigeration cycle, a direct cooling cycle and an evaporation cycle. A main circulation route of the refrigeration circulation comprises a compressor B, an oil component B, a condenser B, a liquid storage tank B, a drying filter B, a refrigeration plate heat exchanger and a gas component B which are sequentially communicated in a closed loop mode, the refrigeration plate heat exchanger is further communicated with a refrigerant tank B, and the refrigerant tank B is further sequentially communicated with a circulating pump and a supercooling plate heat exchanger in a closed loop mode. The main circulation route of the direct cooling circulation comprises a compressor A, an oil component A, a condenser A, a liquid storage tank A, a supercooling plate heat exchanger, a temporary storage tank, a drying filter A, a direct cooling plate and a gas component A; a main circulation route of the evaporation circulation comprises an evaporation pump, an evaporation plate heat exchanger and a refrigerant tank A which are sequentially communicated in a closed loop mode. The evaporation plate exchanger is communicated with the direct cooling plate in parallel; the device further comprises a control mechanism. The direct cooling type battery pack measurement and control system of the new energy automobile is suitable for various automobile types and high in compatibility.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and in particular to a new energy vehicle direct-cooling battery pack measurement and control system. Background Art

[0002] In order to change the increasingly serious problems such as global warming, air pollution, and rising energy costs, the vigorous development of new energy vehicles has become a general consensus of the global society. New energy vehicles have the advantages of low emissions, good economy, and no reliance on oil resources. They have become an important development direction in the automotive field. Among them, the power battery, one of the core components of new energy vehicles, has an important impact on the performance and life of new energy vehicles. The power battery will generate a lot of heat during operation. If the heat management cannot be effectively carried out, it will cause the battery temperature to rise, the performance to decline or even damage, and more seriously, spontaneous combustion accidents will occur. Therefore, thermal management technology has become one of the key technologies in the field of new energy vehicles.

[0003] At present, there are three cooling methods for power batteries: natural cooling, air cooling, liquid cooling, and direct cooling. Among them, direct cooling technology uses the coolant to absorb a large amount of heat during the gas-liquid phase change process to achieve efficient heat exchange. The thermal management system of power batteries has gradually transformed from natural cooling, air cooling, liquid cooling, etc. to direct cooling. The research and development of conventional power battery direct cooling technology is mainly based on independent experiments and is independent of other vehicle systems, resulting in poor compatibility of the direct cooling system and inability to adapt to a variety of vehicle models. Summary of the invention

[0004] In order to solve the technical problems existing in the background technology, the present invention provides a new energy vehicle direct-cooling battery pack measurement and control system, which is adaptable to a variety of vehicle models and has strong compatibility.

[0005] The technical solution adopted by the present invention is:

[0006] A new energy vehicle direct-cooling battery pack measurement and control system comprises: a refrigeration cycle, a direct-cooling cycle, and an evaporation cycle.

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

[0008] Compressor B, oil separator B, condenser B, liquid storage tank B, filter drier B, refrigeration plate exchanger, and gas separator B are connected in a closed loop in sequence;

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

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

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

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

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

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

[0015] Also includes: control mechanism.

[0016] Furthermore, the refrigeration cycle further comprises:

[0017] The pressure controller connected in parallel to the oil separator B, the compressor B and the gas separator B;

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

[0019] A refrigerant branch connected to the refrigerant exchange side of the refrigeration plate, wherein the refrigerant branch is used to connect to the refrigerant tank B.

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

[0021] Furthermore, the direct cooling cycle further comprises:

[0022] Capillary branch, air intake branch, separation branch, and air return branch connected with the same common end;

[0023] The capillary branch and the air suction and supply 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 exchanger, the temporary storage tank, and the drying filter A;

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

[0026] The air suction and air supply branch and the separation branch are connected in parallel to the subcooling plate exchanger, the temporary storage tank, and the dry filter A;

[0027] The air intake and replenishment branches and the air return branches are connected in parallel to the subcooling plate exchanger, temporary storage tank, dry filter A, and direct cooling plate;

[0028] The separation branch and the return air branch are connected in parallel on the direct cooling plate;

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

[0030] The direct cooling branch is connected to the inlet pipeline of the direct cooling plate.

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

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

[0033] Furthermore, the evaporation cycle further comprises:

[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 provided in the refrigerant tank A;

[0036] The refrigerant tank B is provided with a heater B.

[0037] Furthermore, the control mechanism comprises:

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

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

[0040] The advantages of the new energy vehicle direct-cooling battery pack measurement and control system of the present invention are:

[0041] 1. Increase the output of adsorption gas through parallel adsorption equipment;

[0042] 2. Improve the quality of adsorbed output gas by connecting adsorption equipment in series. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the specific implementation of the present invention, the drawings required in the specific implementation are briefly introduced below. The drawings in the following description are implementations of the present invention.

[0044] Figure 1 This is a schematic diagram of the overall process flow of a new energy vehicle direct-cooling battery pack measurement and control system provided by an example of the present invention;

[0045] Figure 2 The present invention provides a schematic diagram of a refrigeration cycle process flow of a direct-cooled battery pack measurement and control system for a new energy vehicle;

[0046] Figure 3The present invention provides a schematic diagram of the direct cooling cycle and evaporation cycle process flow of a direct cooling battery pack measurement and control system for new energy vehicles;

[0047] Figure 4 This is a schematic diagram of an evaporation cycle process flow of a direct-cooled battery pack measurement and control system for a new energy vehicle provided by an example of the present invention;

[0048] Figure 5 The present invention provides a general flow chart of a new energy vehicle direct-cooling battery pack measurement and control system.

[0049] In the figure:

[0050] 1. Refrigeration cycle,

[0051] 101. Compressor B, 102. Oil separator B, 103. Condenser B, 104. Liquid storage tank B, 105. Dry filter B, 106. Refrigeration plate exchange, 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 cycle,

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

[0055] 21. Capillary branch, 22. Air intake branch, 23. Cold liquid supply branch, 24. Separation branch, 25. Direct cooling branch, 26. Return air branch,

[0056] 3. Evaporation cycle,

[0057] 301, evaporator pump, 302, refrigerant tank A,

[0058] 31. Bypass branch A,

[0059] 41. Subcooling plate exchange, 42. Evaporation plate exchange, 43. Direct cooling plate. DETAILED DESCRIPTION

[0060] In order to more clearly and specifically explain the specific implementation purpose and implementation mode of the present invention, the technical solution of the present invention will be fully described below. The described embodiments are part of the embodiments of the present invention, but not all of them. Without making creative work, all other embodiments based on the embodiments described in the present invention belong to the protection scope of the present invention.

[0061] The present invention provides a new energy vehicle direct cooling battery pack measurement and control system, such as Figure 1 As shown, including:

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

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

[0064] The compressor B101, the oil separator B102, the condenser B103, the liquid storage tank B104, the drying filter B105, the refrigeration plate exchanger 106, and the gas separator B107 are sequentially connected in a closed loop; the refrigeration plate exchanger 106 is also connected to a refrigerant tank B109, and a heater B is provided in the refrigerant tank B109. The refrigerant tank B109 is also sequentially connected to a circulating pump 110 and a supercooling plate exchanger 41 in a closed loop.

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

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

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

[0068] Compressor A201, oil separator A202, condenser A203, liquid storage tank A204, subcooling plate exchanger 41, temporary storage tank 208, drying 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 air intake branch 22, the separation branch 24, and the return air branch 26 are connected with the same common end; the capillary branch 21 and the air intake 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 exchanger 41, the temporary storage tank 208, and the drying filter A 205; the capillary branch 21 and the return air branch 26 are connected in parallel to the oil separator A 202, the compressor A 201, and the gas separator A 206; the air intake branch 22 and the separation branch 24 are connected in parallel to the subcooling plate exchanger 41, the temporary storage tank 208, and the drying filter A 205; the air intake branch 22 and the return air branch 26 are connected in parallel to the subcooling plate exchanger 41, the temporary storage tank 208, and the drying filter A 205, on the direct cooling plate 43; the separation branch 24 and the return air branch 26 are connected in parallel to the direct cooling plate 43; they are connected in parallel to the cold supply liquid branch 23 of the temporary storage tank 208; and they are connected to the direct cooling branch 25 arranged on the inlet pipeline of the direct cooling plate 43.

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

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

[0073] The evaporation pump 301, the evaporation plate exchanger 42, and the refrigerant tank A 302 are sequentially connected in a closed loop, and a heater A is arranged in 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 exchanger 42, and the bypass branch A 31 is used for the refrigerant tank A 302.

[0076] The control mechanism comprises:

[0077] The rectifier module powered by the input circuit breaker, the control unit powered by the switching power supply and connected to the card reader, the rectifier module and the control unit are electrically connected with a charging gun, the charging gun is used to supply power to the battery pack, collect system parameters, and send control signals. The compressor B101, the circulation pump 110, the compressor A 201, the evaporation pump 301, the heater A, and the heater B are electrically connected to the control unit via the charging gun.

[0078] According to the specific structure of a new energy vehicle direct cooling type battery pack measurement and control system in the above embodiment, the operation method of the direct cooling system is further described below as shown in Figure 5:

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

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

[0081] The subcooling plate 41 performs secondary condensation to reach the preset subcooling degree;

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

[0083] The stepping electronic expansion valve on the inlet pipeline of the direct cooling plate 43 adjusts the inlet supercooling degree of the direct cooling plate 43;

[0084] The evaporation pressure regulating electronic expansion valve on the outlet pipeline 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 evaporation 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, when the refrigerant in the direct cooling plate 43 is in a gaseous state, it returns to the compressor A 201 through the return gas solenoid valve B on the pipeline connecting the gas separator A 206 and the return gas branch 26 .

[0087] The capillary branch 21 cooperates with the condenser A 203 to stabilize the system pressure;

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

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

[0090] The separation branch 24 bypasses the mass flow meter and does not measure 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 degree of the evaporator plate exchanger 42.

[0092] Based on the above, the embodiment of the direct-cooled battery pack measurement and control system for new energy vehicles of the present invention is inspired. Through the above description, relevant personnel can make various changes and modifications without departing from the scope of the technical idea of ​​the present invention.

Claims

1. A new energy vehicle direct-cooling battery pack measurement and control system, characterized in that: include: Refrigeration cycle (1), direct cooling cycle (2), evaporation cycle (3); The main circulation route of the refrigeration cycle (1) comprises: A compressor B (101), an oil separator B (102), a condenser B (103), a liquid storage tank B (104), a drying filter B (105), a refrigeration plate exchanger (106), and a gas separator B (107) which are sequentially connected in a closed loop; The refrigeration plate exchanger (106) is also connected to a refrigerant tank B (109), and the refrigerant tank B (109) is also connected to a circulation pump (110) and a subcooling plate exchanger (41) in a closed loop. The main circulation route of the direct cooling cycle (2) includes: Compressor A (201), oil separator A (202), condenser A (203), liquid storage tank A (204), subcooling plate exchanger (41), temporary storage tank (208), drying filter A (205), direct cooling plate (43), gas separator A (206); The main circulation route of the evaporation cycle (3) comprises: An evaporator pump (301), an evaporator plate exchanger (42), and a refrigerant tank A (302) are sequentially connected in a closed loop; The evaporation plate (42) is connected in parallel with the direct cooling plate (43); Also includes: control mechanism.

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

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

4. A new energy vehicle direct-cooling battery pack measurement and control system according to claim 2, characterized in that: The direct cooling cycle (2) further comprises: A capillary branch (21), an air intake branch (22), a separation branch (24), and an air return branch (26) connected to the same common end; The capillary branch (21) and the air intake and supply 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 exchanger (41), the temporary storage tank (208), and the drying filter A (205); The capillary branch (21) and the air return branch (26) are connected in parallel to the oil separator A (202), the compressor A (201), and the gas separator A (206); The air intake and replenishment branch (22) and the separation branch (24) are connected in parallel to the subcooling plate exchanger (41), the temporary storage tank (208), and the drying filter A (205); The air intake and supply branch (22) and the air return branch (26) are connected in parallel to the subcooling plate exchanger (41), the temporary storage tank (208), the drying filter A (205), and the direct cooling plate (43); The separation branch (24) and the return air branch (26) are connected in parallel to the direct cooling plate (43); A cold liquid supply branch (23) connected in parallel to the temporary storage tank (208); A direct cooling branch (25) is connected to the inlet pipeline of the direct cooling plate (43).

5. A new energy vehicle direct-cooling battery pack measurement and control system according to claim 4, characterized in that: The capillary branch (21) is connected to a capillary tube (207).

6. A new energy vehicle direct-cooling battery pack measurement and control system according to claim 4, characterized in that: The evaporation plate exchanger (42) is connected to the direct cooling plate (43), the connecting pipeline of the gas separator A (206) and the common end of the capillary branch (21), the suction and supply gas branch (22), and the separation branch (24).

7. A new energy vehicle direct-cooling battery pack measurement and control system according to claim 6, characterized in that: The evaporation cycle (3) further comprises: A bypass branch A (31) is connected to the refrigerant side of the evaporator plate exchanger (42), and the bypass branch A (31) is used for the refrigerant tank A (302).

8. A new energy vehicle direct-cooling battery pack measurement and control system according to claim 7, characterized in that: A heater A is provided in the refrigerant tank A (302); A heater B is provided in the refrigerant tank B (109).

9. A new energy vehicle direct-cooling battery pack measurement and control system according to claim 8, characterized in that: The control mechanism comprises: A rectifier module powered by an input circuit breaker, a control unit powered by a switching power supply and connected to a card reader for communication, the rectifier module and the control unit are electrically connected to a charging gun, and the charging gun is used to supply power to the battery pack, collect system parameters, and send control signals.

10. A new energy vehicle direct-cooling battery pack measurement and control system according to claim 9, characterized in that: The compressor B (101), the circulation pump (110), the compressor A (201), the evaporation pump (301), the heater A, and the heater B are electrically connected to the control unit via a charging gun.

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