Power battery system of new energy shunting locomotive

Abstract

The invention belongs to the technical field of new energy shunting locomotives, and provides a power battery system which comprises a BMS management system, a heat management system and a fire fighting system, the heat management system comprises a heating module, a liquid cooling heat dissipation plate and the like, a power battery is heated under the low-temperature working condition, the power battery is cooled under the high-temperature working condition, and the fire fighting system is used for fire fighting. And accurate control of the temperature of the power battery is realized. The fire-fighting system is equipped with various detectors such as a temperature detector and a smoke detector, so that battery fire characteristic early warning is realized. And a novel efficient rapid fire extinguishing device is designed, rapid and effective extinguishing of the battery fire is realized by means of a novel fire extinguishing inhibition medium, and the effect of effectively protecting the battery system is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy shunting locomotives, and in particular to a power battery system for a new energy shunting locomotive. Background Art

[0002] A shunting locomotive is used for shunting operations such as train formation, dismantling, line switching, and vehicle pickup and delivery. Its operations are characterized by frequent starts and stops. Technically, a shunting locomotive differs from a typical mainline locomotive used to pull trains: it does not require a high speed, but does require a certain level of tractive effort. Because it frequently moves forward and backward, it requires good visibility. To negotiate curves with a small radius, its fixed wheelbase must be small. Frequent starts and stops require flexible maneuverability and good braking performance.

[0003] Currently, diesel locomotives are commonly used in shunting operations in my country, often used for short-distance runs and shunting. When operating in traction mode, these locomotives serve as the energy source for locomotive operation. Their traction wheel peripheral power (RHP) is typically 70%-80% of the diesel engine's gross power (GHP), resulting in low overall efficiency. Most of the diesel shunting locomotives currently in operation are older models, facing replacement or scrapping. They spend most of their time idling, resulting in high no-load energy consumption. Retrofitting these shunting locomotives with new energy sources offers significant cost savings, energy reduction, and environmental benefits.

[0004] The new energy transformation of shunting locomotives requires switching from diesel engines to power batteries. In June 2019, Xu Shida published a master's thesis at Beijing Jiaotong University titled "Battery Management System and Redundant Design for Hybrid Locomotives." He proposed a battery system and management system design for hybrid locomotives equipped with both diesel engines and power batteries. A Chinese invention patent application, publication number CN112172612A and dated January 5, 2021, discloses a control method for a hybrid shunting locomotive using a fuel cell and power battery.

[0005] To ensure the safety of shunting locomotive operations, the power batteries of existing new energy shunting locomotives are equipped with a battery management system (BMS), a thermal management system, and a fire protection system. The thermal management system includes a built-in heating module, a liquid cooling heat sink, and an external water cooling unit. This system heats the power battery in low-temperature conditions and cools it in high-temperature conditions, achieving precise control of the battery temperature. The fire protection system is equipped with multiple detectors, including temperature and smoke sensors, to provide early warning of battery fire characteristics. It is also designed with a rapid fire extinguishing device.

[0006] To meet the operational requirements of new energy shunting locomotives, ground-based charging facilities are required to recharge them. For applications where a large number of new energy shunting locomotives are deployed in a centralized manner and on-site charging is not possible, power battery packs are required. When the power batteries on a new energy shunting locomotive are low on power, a quick battery swap system can be used to quickly swap the batteries and quickly install a spare power battery pack on the new energy shunting locomotive to maintain operation.

[0007] However, there is little research on the power battery structure of new energy shunting locomotives, and the power battery structure of existing new energy shunting locomotives is difficult to meet the working requirements of rapid battery replacement. Summary of the Invention

[0008] The object of the present invention is to provide a power battery system for a new energy shunting locomotive, which is suitable for battery replacement.

[0009] The above technical objectives of the present invention are achieved through the following technical solutions: A power battery system for a new energy shunting locomotive, comprising a battery rack, several battery standard boxes, a thermal management system, a fire protection system, and an adjustment mechanism. The thermal management system comprises a liquid cooling module, the liquid cooling module comprises a condenser, an expansion kettle, a first liquid cooling pipeline connected to the expansion kettle, several first liquid cooling branches connected to the first liquid cooling pipeline, a liquid cooling plate installed at the bottom of each battery standard box, a second liquid cooling branch and a third liquid cooling branch installed on each liquid cooling plate, a second liquid cooling pipeline connected to the condenser, and several fourth liquid cooling branches connected to the second liquid cooling pipeline. The fire protection system includes a fire extinguishing medium container, a fire extinguishing medium pipeline connected to the fire extinguishing medium container, a plurality of first fire extinguishing medium branches connected to the fire extinguishing medium pipeline, and a second fire extinguishing medium branch installed in each of the battery standard boxes. The adjustment mechanism includes an adjustment seat and an adjustment component that drives the adjustment seat to rise and fall. The first liquid-cooling branch pipe, the fourth liquid-cooling branch pipe, and the first fire extinguishing medium branch pipe are all installed and fixed on the adjustment seat. The lower end of the first liquid-cooling branch pipe is inserted into the second liquid-cooling branch pipe, the lower end of the fourth liquid-cooling branch pipe is inserted into the third liquid-cooling branch pipe, and the lower end of the first fire extinguishing medium branch pipe is inserted into the second fire extinguishing medium branch pipe.

[0010] By adopting the above technical solution, the power battery structure of a new energy shunting locomotive differs from that of a new energy vehicle. The power battery system includes a battery rack and a standard battery box installed in the battery rack. When replacing batteries, the standard battery box in the battery rack is removed and a pre-charged spare standard battery box is installed. However, the existing thermal management system and fire protection system in the power battery system will affect the battery replacement operation. Therefore, the present invention has developed a novel power battery system for a new energy shunting locomotive. When a battery replacement is required, the adjustment assembly adjusts the adjustment seat to rise, and the adjustment seat drives the first liquid cooling branch pipe to separate from the second liquid cooling branch pipe, the fourth liquid cooling branch pipe to separate from the third liquid cooling branch pipe, and the first fire extinguishing medium branch pipe to separate from the second fire extinguishing medium branch pipe. The battery replacement operation is then carried out. After the pre-charged standard battery box is placed in the battery rack, the adjustment assembly adjusts the adjustment seat to descend, and the adjustment seat drives the lower end of the first liquid cooling branch pipe to insert into the second liquid cooling branch pipe, the lower end of the fourth liquid cooling branch pipe to insert into the third liquid cooling branch pipe, and the first fire extinguishing medium branch pipe to insert into the second liquid cooling branch pipe. When the battery standard box needs to be liquid-cooled, the liquid cooling medium flows into the liquid cooling plate from the expansion kettle, the first liquid cooling pipe, several first liquid cooling branches, and the second liquid cooling branch in sequence. After absorbing the heat of the battery cell modules in the battery standard box at the liquid cooling plate, it flows into the condenser from the third liquid cooling branch, the fourth liquid cooling branch, and the second liquid cooling pipe for heat exchange and cooling. The cooled liquid cooling medium then flows into the expansion kettle, forming a circulating flow condition.

[0011] When fire extinguishing is required, the fire extinguishing medium in the fire extinguishing medium container is pumped along the fire extinguishing medium pipeline, the first fire extinguishing medium branch pipe, and the second fire extinguishing medium branch pipe into the battery standard box for fire extinguishing.

[0012] The present invention is further configured as follows: a first sealing ring is fixed to the inner wall of the second liquid-cooling branch pipe, the first sealing ring is used to be sleeved on the outer wall of the first liquid-cooling branch pipe, and a second sealing ring is fixed to the end of the second liquid-cooling branch pipe, the second sealing ring is used to contact the end of the first liquid-cooling branch pipe.

[0013] By adopting the above technical solution, when the first liquid-cooling branch pipe is inserted into the second liquid-cooling branch pipe, the first sealing ring and the second sealing ring are used to seal the gap between the two.

[0014] The present invention is further configured as follows: a third sealing ring is fixed to the inner wall of the third liquid-cooling branch pipe, the third sealing ring is used to be sleeved on the outer wall of the fourth liquid-cooling branch pipe, and a fourth sealing ring is fixed to the end of the third liquid-cooling branch pipe, the fourth sealing ring is used to contact the end of the fourth liquid-cooling branch pipe.

[0015] By adopting the above technical solution, when the fourth liquid-cooling branch pipe is inserted into the third liquid-cooling branch pipe, the third sealing ring and the fourth sealing ring are used to seal the gap between the two.

[0016] The present invention is further configured as follows: a fifth sealing ring is fixed to the inner wall of the second fire extinguishing medium branch pipe, the fifth sealing ring is used to be sleeved on the outer wall of the first fire extinguishing medium branch pipe, and a sixth sealing ring is fixed to the end of the second fire extinguishing medium branch pipe, the sixth sealing ring is used to contact the end of the first fire extinguishing medium branch pipe.

[0017] By adopting the above technical solution, when the first fire extinguishing medium branch pipe is inserted into the second fire extinguishing medium branch pipe, the fifth sealing ring and the sixth sealing ring are used to seal the gap between the two.

[0018] The present invention is further configured as follows: the adjustment assembly includes a first electric push rod, a horizontally movable seat fixed to the rod body of the first electric push rod, and an elastic member, the horizontally movable seat is provided with a guide surface, the adjustment seat is movably arranged on the battery rack along the vertical direction, the adjustment seat is provided with a through hole, the horizontally movable seat passes through the through hole, and the elastic force of the elastic member acts on the adjustment seat so that the inner wall of the through hole is always attached to the guide surface.

[0019] By adopting the above technical solution, the first electric push rod body extends to drive the horizontal movable seat to move, and the guide surface of the horizontal movable seat drives the adjustment seat to rise. The first electric push rod body retracts to drive the horizontal movable seat to move, and the adjustment seat descends under the cooperation of the elastic force of the elastic member and the guide surface.

[0020] The present invention is further configured as follows: the battery rack is fixed with at least three guide rods, the adjustment seat is provided with guide holes corresponding to the guide rods, and the guide rods are vertically arranged and inserted into the guide holes.

[0021] The present invention is further configured as follows: a solenoid valve 1 is installed on the first liquid cooling branch pipe, a solenoid valve 2 is installed on the second liquid cooling branch pipe, a first bypass pipe is installed on the first liquid cooling branch pipe, a first waterproof breathable membrane is installed on the end of the first bypass pipe, a first bypass solenoid valve is installed on the first bypass pipe, a second bypass pipe is installed on the second liquid cooling branch pipe, a second bypass solenoid valve, a piston cylinder, and a piston installed in the piston cylinder are installed on the second bypass pipe, a second electric push rod is installed in the battery standard box, the second electric push rod is used to drive the piston to move, a solenoid valve 3 is installed on the third liquid cooling branch pipe, a solenoid valve 4 is installed on the fourth liquid cooling branch pipe, a fourth bypass pipe is installed on the fourth bypass pipe, a fourth bypass solenoid valve is installed on the fourth bypass pipe, and a second waterproof breathable membrane is installed on the end of the fourth bypass pipe.

[0022] By adopting the above technical solution, the connection and separation between the first liquid cooling branch pipe and the second liquid cooling branch pipe, and the connection and separation between the fourth liquid cooling branch pipe and the third liquid cooling branch pipe may easily cause the liquid cooling medium to spill, resulting in circuit short circuit and safety hazards. Therefore, the present invention is provided with a first bypass pipe, a second bypass pipe, a piston cylinder, a piston, a first bypass solenoid valve, solenoid valve one, solenoid valve two, solenoid valve three, and solenoid valve four. Before the adjusting seat rises, solenoid valve one and solenoid valve four are closed, and solenoid valve two, solenoid valve three, the first bypass solenoid valve, the second bypass solenoid valve, and the fourth bypass solenoid valve are all opened. After the second electric push rod pushes the piston to move, the liquid cooling medium contained in the piston cylinder increases, and the liquid level in the second liquid cooling branch pipe and the third liquid cooling branch pipe drops. External air enters the first bypass solenoid valve through the first waterproof and breathable membrane, and then the first bypass solenoid valve, solenoid valve two, and solenoid valve three are closed. Then, the adjusting seat is driven to rise through the adjusting component. In the process of the first liquid cooling branch pipe being separated from the second liquid cooling branch pipe and the process of the fourth liquid cooling branch pipe being separated from the third liquid cooling branch pipe, no liquid cooling medium will spill out.

[0023] After the battery replacement is completed and the adjustment seat is lowered, the first solenoid valve and the fourth battery valve remain closed, and the second solenoid valve, the third solenoid valve, the first bypass solenoid valve, the second bypass solenoid valve, and the fourth bypass solenoid valve all remain open. The second electric push rod drives the piston to move, squeezing the liquid cooling medium in the piston cylinder into the second liquid cooling branch pipe. The liquid cooling medium level in the second liquid cooling branch pipe and the third liquid cooling branch pipe rises and fills the lower end of the first liquid cooling medium and the lower end of the fourth liquid cooling medium, squeezing the air in the pipeline out of the first bypass pipeline and the second bypass pipeline, and then close the first bypass solenoid valve, the second bypass solenoid valve, and the fourth bypass solenoid valve, and open solenoid valve one and solenoid valve four.

[0024] The present invention is further configured as follows: the first liquid-cooling branch pipe includes a first hose and a first plug from top to bottom, the fourth liquid-cooling branch pipe includes a fourth hose and a fourth plug from top to bottom, the first fire-extinguishing medium branch pipe includes a second hose and a second plug from top to bottom, the first plug, the second plug and the fourth plug are all installed and fixed on the adjustment seat, a flow channel is formed in the liquid cooling plate, the flow channel is formed with a liquid inlet and a liquid outlet, the second liquid-cooling branch pipe is connected to the liquid inlet, and the third liquid-cooling branch pipe is connected to the liquid outlet.

[0025] By adopting the above technical solution, the design of the first hose, the second hose and the fourth hose facilitates the adjustment seat to drive the first insert tube, the second insert tube and the fourth insert tube to rise and fall.

[0026] The present invention is further configured as follows: the first liquid cooling pipe is installed with a circulation pump, the fire extinguishing medium pipeline is installed with a sprinkler pump, the battery rack includes several installation stations, the battery standard box is installed in the installation station, the battery rack includes a support frame located at the bottom of the installation station, the battery standard box is installed in the support frame, the battery rack is installed with a linear motor, the linear motor is used to drive the support frame to move, the battery rack is installed with connector 1, the battery standard box is installed with connector 2, and the connector 1 is in contact with the connector 2.

[0027] The present invention is further configured to include a control system, wherein the second electric push rod is wirelessly connected to the control system, and the battery standard box supplies power to the second electric push rod.

[0028] The beneficial effects of the present invention are:

[0029] 1. The present invention is configured with an adjustment component and an adjustment seat to realize the connection and separation of the first liquid cooling branch pipe and the second liquid cooling branch pipe, the connection and separation of the fourth liquid cooling branch pipe and the third liquid cooling branch pipe, and the connection and separation of the first fire extinguishing medium branch pipe and the second fire extinguishing medium branch pipe, and can simultaneously take into account the needs of liquid cooling heat dissipation, fire extinguishing, and power replacement.

[0030] 2. During the connection and separation of the first liquid-cooling branch pipe and the second liquid-cooling branch pipe, and the connection and separation of the fourth liquid-cooling branch pipe and the third liquid-cooling branch pipe, the present invention can effectively reduce the spillage of liquid cooling medium and reduce safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the present invention.

[0032] Figure 2 It is a schematic diagram of the positional relationship among the battery rack, battery standard box and adjustment mechanism of the present invention.

[0033] Figure 3 It is a structural schematic diagram of the adjustment mechanism of the present invention.

[0034] Figure 4 It is a schematic diagram of the connection relationship of the first liquid-cooling branch pipe, the second liquid-cooling branch pipe, the third liquid-cooling branch pipe, and the fourth liquid-cooling branch pipe of the present invention.

[0035] Figure 5 yes Figure 4 Enlarged view of point A.

[0036] In the figure, 1. battery rack; 11. support frame; 2. battery standard box; 3. liquid cooling module; 31. first liquid cooling pipeline; 32. second liquid cooling pipeline; 33. first liquid cooling branch pipe; 331. solenoid valve 1; 332. first hose; 333. first plug pipe; 34. second liquid cooling branch pipe; 341. first sealing ring; 342. second sealing ring; 343. solenoid valve 2; 35. third liquid cooling branch pipe; 351. third sealing ring; 352. fourth sealing ring; 353. solenoid valve 3; 36. fourth liquid cooling branch pipe; 361. solenoid valve 4; 362. fourth hose; 363. fourth plug pipe; 37. condenser; 38. expansion kettle; 39. circulation pump; 4. fire protection system; 41. fire extinguishing medium container; 42. fire extinguishing medium Pipeline; 43, first fire extinguishing medium branch; 431, second hose; 432, second insert; 44, second fire extinguishing medium branch; 441, fifth sealing ring; 442, sixth sealing ring; 5, adjustment mechanism; 51, adjustment seat; 511, perforation; 512, guide rod; 513, guide hole; 52, adjustment assembly; 521, first electric push rod; 522, horizontal moving seat; 523, elastic member; 524, guide surface; 6, first bypass pipe; 61, first bypass solenoid valve; 62, first waterproof breathable membrane; 7, second bypass pipe; 71, second bypass solenoid valve; 73, piston cylinder; 74, piston; 75, second electric push rod; 8, fourth bypass pipe; 81, fourth bypass solenoid valve; 82, second waterproof breathable membrane. DETAILED DESCRIPTION

[0037] A power battery system for a new energy shunting locomotive, such as Figures 1 to 5 As shown, the system includes a battery rack 1 and multiple standard battery boxes 2. The battery rack 1 is equipped with twelve installation stations, arranged in two rows, with twelve standard battery boxes 2 positioned at each station. Each station is equipped with a support frame 11 and a linear motor, which drives the support frame 11 to move it out of or back into the installation station. The standard battery boxes 2 are mounted within the support frame 11. Connector 1 is installed on the battery rack 1, and connector 2 is installed on the standard battery boxes 2. Connector 1 and connector 2 make contact, energizing the system.

[0038] The main process of the power battery replacement operation is: the linear motor drives the support frame 11 to move and send the battery standard box 2 to the outside of the installation station, the battery replacement robot takes the battery standard box 2 out of the support frame 11, and then puts the spare battery standard box 2 that is fully charged in advance into the support frame 11, and the linear motor pulls the support frame 11 back to the installation station.

[0039] Each standard battery box 2 consists of a box body and three battery modules within it. Each battery module is composed of 14 cells connected in series. The power battery system of the new energy shunting locomotive includes a BMS management system, a thermal management system, and a fire protection system 4. The cells within each battery module are laser-welded and connected to the BMS system's BMU module via a flexible FPC data acquisition board. This collects voltage and temperature for each cell and performs active balancing adjustments for cells with large voltage differentials. The thermal management system includes a heating module and a liquid cooling module 3. The heating module includes six electric heating films, one on each side of each battery module.

[0040] The liquid cooling module 3 includes a condenser 37, an expansion kettle 38, a first liquid cooling pipe 31 connected to the expansion kettle 38, twelve first liquid cooling branches 33 connected to the first liquid cooling pipe 31, a liquid cooling plate installed at the bottom of each battery standard box 2, second and third liquid cooling branches 34, 35 installed on each liquid cooling plate, a second liquid cooling pipe 32 connected to the condenser 37, and twelve fourth liquid cooling branches 36 connected to the second liquid cooling pipe 32. The twelve first liquid cooling branches 33 correspond to the second liquid cooling branches 34 on the twelve battery standard boxes 2, and the twelve fourth liquid cooling branches 36 correspond to the third liquid cooling branches 35 on the twelve battery standard boxes 2. The bottoms of the three battery modules are attached to the liquid cooling plate. Each liquid cooling plate has a flow channel formed inside, with a liquid inlet and a liquid outlet. The second liquid cooling branch 34 is connected to the liquid inlet, and the third liquid cooling branch 35 is connected to the liquid outlet. The first liquid cooling pipe 31 is installed with a circulation pump 39. Liquid cooling plate is also called liquid cooling heat sink.

[0041] The first liquid-cooling branch pipe 33 comprises, from top to bottom, a first hose 332 and a first insert pipe 333. The first insert pipe 333 is inserted downwardly into the second liquid-cooling branch pipe 34. A first sealing ring 341 is fixed to the inner wall of the second liquid-cooling branch pipe 34. The first sealing ring 341 is designed to fit over the outer wall of the first insert pipe 333. A second sealing ring 342 is fixed to the end of the second liquid-cooling branch pipe 34. The second sealing ring 342 is designed to contact the end of the first insert pipe 333. The fourth liquid-cooling branch pipe 36 comprises, from top to bottom, a fourth hose 362 and a fourth insert pipe 363. The fourth insert pipe 363 is inserted downwardly into the third liquid-cooling branch pipe 35. A third sealing ring 351 is fixed to the inner wall of the third liquid-cooling branch pipe 35. The third sealing ring 351 is designed to fit over the outer wall of the fourth insert pipe 363. A fourth sealing ring 352 is fixed to the end of the third liquid-cooling branch pipe 35. The fourth sealing ring 352 is designed to contact the end of the fourth insert pipe 363.

[0042] The fire protection system 4 includes a fire extinguishing medium container 41, a fire extinguishing medium pipeline 42 connected to the fire extinguishing medium container 41, twelve first fire extinguishing medium branches 43 connected to the fire extinguishing medium pipeline 42, a second fire extinguishing medium branch 44 installed in each battery standard box 2, multiple temperature sensors, and multiple smoke radiators. The fire extinguishing medium pipeline 42 is equipped with a sprinkler pump. The first fire extinguishing medium branch 43 includes, from top to bottom, a second hose 431 and a second insert 432. The second insert 432 is inserted downwardly into the second fire extinguishing medium branch 44. A fifth sealing ring 441 is fixed to the inner wall of the second fire extinguishing medium branch 44, which is designed to fit over the outer wall of the second insert 432. A sixth sealing ring 442 is fixed to the end of the second fire extinguishing medium branch 44, which is designed to contact the end of the second insert 432. The fire extinguishing medium pipeline 42 is filled with a new fire extinguishing suppression medium, which uses perfluorohexanone.

[0043] The power battery system of the new energy shunting locomotive also includes an adjustment mechanism 5, twelve of which correspond to twelve standard battery boxes 2. The adjustment mechanism 5 comprises an adjustment seat 51 and an adjustment assembly 52. ​​The adjustment seat 51 is provided with four guide holes 513, which vertically extend through the adjustment seat 51. The battery rack 1 is secured with four guide rods 512, which are vertically positioned and inserted into the guide holes 513. The adjustment assembly 52 comprises a first electric push rod 521 mounted on the battery rack 1, a horizontally movable seat 522 fixed to the rod body of the first electric push rod 521, and elastic members 523. The elastic members 523 are four springs, one end of which is fixed to the battery rack 1 and the other end to the adjustment seat 51. The springs are also vertically positioned. The horizontally movable seat 522 is formed with a guide surface 524. The adjustment seat 51 is provided with a through-hole 511, through which the horizontally movable seat 522 passes, and the guide surface 524 is in contact with the inner wall of the through-hole 511. The spring is in a compressed state, which always exerts a downward force on the adjustment seat 51 and drives the inner wall of the through hole 511 of the adjustment seat 51 to always stick to the guide surface 524. The first insertion tube 333, the second insertion tube 432, and the fourth insertion tube 363 are all fixed on the adjustment seat 51.

[0044] The adjustment assembly 52 is used to adjust the adjustment seat 51 upward. The specific adjustment process is as follows: the first electric push rod 521 extends, driving the horizontal movable seat 522 to move, and the guide surface 524 of the horizontal movable seat 522 drives the adjustment seat 51 to rise. The first electric push rod 521 retracts, driving the horizontal movable seat 522 to move, and the adjustment seat 51 descends under the elastic force of the elastic member 523 and the cooperation of the guide surface 524. Before the battery replacement operation, the adjustment seat 51 rises, driving the first insert 333 to detach from the second liquid-cooling branch 34, the fourth insert 363 to detach from the third liquid-cooling branch 35, and the second insert 432 to detach from the second fire-extinguishing medium branch 44. After the battery replacement operation, the adjustment seat 51 descends, driving the second insert 432 to insert into the second liquid-cooling branch 34, the fourth insert 363 to insert into the third liquid-cooling branch 35, and the second insert 432 to insert into the second fire-extinguishing medium branch 44.

[0045] A solenoid valve 1 331 is installed on the first liquid cooling branch pipe 33, a solenoid valve 2 343 is installed on the second liquid cooling branch pipe 34, a first bypass pipe 6 is installed on the first liquid cooling branch pipe 33, a first waterproof breathable membrane 62 is installed at the end of the first bypass pipe 6, a first bypass solenoid valve 61 is installed on the first bypass pipe 6, a second bypass pipe 7 is installed on the second liquid cooling branch pipe 34, a second bypass solenoid valve 71 is installed on the second bypass pipe 7, a piston cylinder 73 and a piston 74 installed in the piston cylinder 73 are installed on the second bypass pipe 7, the battery standard box 2 is installed with a second electric push rod 75, the second electric push rod 75 is used to drive the piston 74 to move, the third liquid cooling branch pipe 35 is installed with a solenoid valve 353, the fourth liquid cooling branch pipe 36 is installed with a solenoid valve 4 361, the fourth liquid cooling pipe is installed with a fourth bypass pipe 8, the fourth bypass pipe 8 is installed with a fourth bypass solenoid valve 81, and a second waterproof breathable membrane 82 is installed at the end of the fourth bypass pipe 8.

[0046] Working principle: The connection and separation between the first liquid cooling branch pipe 33 and the second liquid cooling branch pipe 34, and the connection and separation between the fourth liquid cooling branch pipe 36 and the third liquid cooling branch pipe 35, can easily cause the liquid cooling medium to spill out, resulting in a short circuit and safety hazards. Therefore, the present invention sets a first bypass pipe 6, a second bypass pipe 7, a piston cylinder 73, a piston 74, a first bypass solenoid valve 61, a solenoid valve 1 331, a solenoid valve 2 343, a solenoid valve 3 353, and a solenoid valve 4 361. Before the adjustment seat 51 rises, the solenoid valve 1 331 and the solenoid valve 4 361 are closed, the solenoid valve 2 343, the solenoid valve 3 353, the first bypass solenoid valve 61, the second bypass solenoid valve 71, and the fourth bypass solenoid valve 81 are all opened. After the second electric push rod 75 pushes the piston 74 to move, the piston The amount of liquid cooling medium contained in the cylinder 73 increases, the liquid levels in the second liquid cooling branch pipe 34 and the third liquid cooling branch pipe 35 decrease, and the external air enters the first bypass solenoid valve 61 through the first waterproof breathable membrane 62, and then the first bypass solenoid valve 61, the second solenoid valve 343, and the third solenoid valve 353 are closed. Then, the adjustment seat 51 is driven to rise through the adjustment component 52. In the process of the first liquid cooling branch pipe 33 being separated from the second liquid cooling branch pipe 34 and the process of the fourth liquid cooling branch pipe 36 being separated from the third liquid cooling branch pipe 35, no liquid cooling medium will be spilled.

[0047] After the battery replacement is completed and the adjustment seat 51 is lowered, the first solenoid valve and the fourth battery valve remain closed, and the second solenoid valve, the third solenoid valve, the first bypass solenoid valve 61, the second bypass solenoid valve 71, and the fourth bypass solenoid valve 81 all remain open. The second electric push rod 75 drives the piston 74 to move, and squeezes the liquid cooling medium in the piston cylinder 73 into the second liquid cooling branch pipe 34. The liquid level of the liquid cooling medium in the second liquid cooling branch pipe 34 and the third liquid cooling branch pipe 35 rises and fills the lower end of the first liquid cooling medium and the lower end of the fourth liquid cooling medium, squeezing the air in the pipeline from the first bypass pipe 6 and the second bypass pipe 7, and then closes the first bypass solenoid valve 61, the second bypass solenoid valve 71, and the fourth bypass solenoid valve 81, and opens solenoid valve 1 331 and solenoid valve 4 361.

[0048] The power battery system of the new energy shunting locomotive also includes a control system. The first electric push rod 521, the second electric push rod 75, the solenoid valve 1 331, the solenoid valve 2 343, the solenoid valve 3 353, the solenoid valve 4 361, the first bypass solenoid valve 61, and the second bypass solenoid valve 71 are all controlled by the control system. Among them, the second electric push rod 75, the solenoid valve 2 343, and the solenoid valve 353 are all connected to the control system through wireless communication.

[0049] Working principle: When battery replacement is required, before the battery replacement operation, the adjustment component 52 adjusts the adjustment seat 51 to rise, and the adjustment seat 51 drives the first liquid cooling branch 33 to separate from the second liquid cooling branch 34, the fourth liquid cooling branch 36 to separate from the third liquid cooling branch 35, and the first fire extinguishing medium branch 43 to separate from the second fire extinguishing medium branch 44, and then the battery replacement operation is carried out. After the battery standard box 2 that is fully charged in advance is sent into the battery rack 1, after the battery replacement operation is completed, the adjustment component 52 adjusts the adjustment seat 51 to descend, and the adjustment seat 51 drives the lower end of the first liquid cooling branch 33 to be inserted into the second liquid cooling branch 34, the lower end of the fourth liquid cooling branch 36 to be inserted into the third liquid cooling branch 35, and the first fire extinguishing medium branch 43 to be inserted into the second liquid cooling branch 34. When liquid cooling is required for the battery standard case 2, the liquid cooling medium flows sequentially from the expansion kettle 38, the first liquid cooling pipe 31, the first liquid cooling branch pipes 33, and the second liquid cooling branch pipe 34 into the liquid cooling plate. After absorbing heat from the battery cell modules within the battery standard case 2, the liquid cooling medium then flows from the third liquid cooling branch pipe 35, the fourth liquid cooling branch pipe 36, and the second liquid cooling pipe 32 into the condenser 37 for heat exchange and cooling. The cooled liquid cooling medium then flows into the expansion kettle 38, forming a circulating flow. When fire extinguishing is required, the fire extinguishing medium in the fire extinguishing medium container 41 is pumped along the fire extinguishing medium pipe 42, the first fire extinguishing medium branch pipe 43, and the second fire extinguishing medium branch pipe 44 into the battery standard case 2 for extinguishing.

Claims

1. A power battery system for a new energy shunting locomotive, characterized by: The invention comprises a battery rack (1), a plurality of battery standard boxes (2), a thermal management system, a fire protection system (4), and a regulating mechanism (5); the thermal management system comprises a liquid cooling module (3); the liquid cooling module (3) comprises a condenser (37), an expansion kettle (38), a first liquid cooling pipeline (31) connected to the expansion kettle (38), a plurality of first liquid cooling branches (33) connected to the first liquid cooling pipeline (31), a liquid cooling plate installed at the bottom of each battery standard box (2), a second liquid cooling branch (34) and a third liquid cooling branch (35) installed on each liquid cooling plate, a second liquid cooling pipeline (32) connected to the condenser (37), and a plurality of fourth liquid cooling branches (36) connected to the second liquid cooling pipeline (32); the fire protection system (4) comprises a fire extinguishing medium container (41), a first liquid cooling pipeline (31) connected to the expansion kettle (38), a plurality of first liquid cooling branches (33) connected to the first liquid cooling pipeline (31), a liquid cooling plate installed at the bottom of each battery standard box (2), a second liquid cooling branch (34) and a third liquid cooling branch (35) installed on each liquid cooling plate, a second liquid cooling pipeline (32) connected to the condenser (37), and a plurality of fourth liquid cooling branches (36) connected to the second liquid cooling pipeline (32); The fire extinguishing medium pipeline (42) of the fire medium container (41), a plurality of first fire extinguishing medium branches (43) connected to the fire extinguishing medium pipeline (42), and a second fire extinguishing medium branch (44) installed in each of the battery standard boxes (2); the regulating mechanism (5) includes an regulating seat (51) and an regulating assembly (52) for driving the regulating seat (51) to rise and fall; the first liquid cooling branch (33), the fourth liquid cooling branch (36), and the first fire extinguishing medium branch (43) are all mounted and fixed on the regulating seat (51); the lower end of the first liquid cooling branch (33) is inserted into the second liquid cooling branch (34); the lower end of the fourth liquid cooling branch (36) is inserted into the third liquid cooling branch (35); and the lower end of the first fire extinguishing medium branch (43) is inserted into the second fire extinguishing medium branch (44).

2. The power battery system for a new energy shunting locomotive according to claim 1, characterized in that: A first sealing ring (341) is fixed to the inner wall of the second liquid-cooling branch pipe (34), and the first sealing ring (341) is used to be sleeved on the outer wall of the first liquid-cooling branch pipe (33). A second sealing ring (342) is fixed to the end of the second liquid-cooling branch pipe (34), and the second sealing ring (342) is used to contact the end of the first liquid-cooling branch pipe (33).

3. The power battery system for a new energy shunting locomotive according to claim 1, characterized in that: A third sealing ring (351) is fixed on the inner wall of the third liquid-cooling branch pipe (35), and the third sealing ring (351) is used to be sleeved on the outer wall of the fourth liquid-cooling branch pipe (36). A fourth sealing ring (352) is fixed on the end of the third liquid-cooling branch pipe (35), and the fourth sealing ring (352) is used to contact the end of the fourth liquid-cooling branch pipe (36).

4. The power battery system for a new energy shunting locomotive according to claim 1, characterized in that: A fifth sealing ring (441) is fixed to the inner wall of the second fire extinguishing medium branch pipe (44), and the fifth sealing ring (441) is used to be sleeved on the outer wall of the first fire extinguishing medium branch pipe (43). A sixth sealing ring (442) is fixed to the end of the second fire extinguishing medium branch pipe (44), and the sixth sealing ring (442) is used to contact the end of the first fire extinguishing medium branch pipe (43).

5. The power battery system for a new energy shunting locomotive according to claim 1, characterized in that: The adjustment assembly (52) comprises a first electric push rod (521), a horizontal movable seat (522) fixed to the rod body of the first electric push rod (521), and an elastic member (523). The horizontal movable seat (522) is provided with a guide surface (524). The adjustment seat (51) is movably arranged on the battery rack (1) along the vertical direction. The adjustment seat (51) is provided with a through hole (511). The horizontal movable seat (522) passes through the through hole (511). The elastic force of the elastic member (523) acts on the adjustment seat (51) so that the inner wall of the through hole (511) always sticks to the guide surface (524).

6. A power battery system for a new energy shunting locomotive according to claim 1 or 5, characterized in that: The battery rack (1) is fixed with at least three guide rods (512); the adjustment seat (51) is provided with guide holes (513) corresponding to the guide rods (512); the guide rods (512) are vertically arranged and inserted into the guide holes (513).

7. The power battery system for a new energy shunting locomotive according to claim 6, characterized in that: The first liquid cooling branch pipe (33) is installed with a solenoid valve 1 (331), the second liquid cooling branch pipe (34) is installed with a solenoid valve 2 (343), the first liquid cooling branch pipe (33) is installed with a first bypass pipe (6), the end of the first bypass pipe (6) is installed with a first waterproof breathable membrane (62), the first bypass pipe (6) is installed with a first bypass solenoid valve (61), the second liquid cooling branch pipe (34) is installed with a second bypass pipe (7), the second bypass pipe (7) is installed with a piston cylinder (73), the piston cylinder ( 73), a second electric push rod (75) is installed in the battery standard box (2), the second electric push rod (75) is used to drive the piston (74) to move, the third liquid cooling branch pipe (35) is installed with a solenoid valve three (353), the fourth liquid cooling branch pipe (36) is installed with a solenoid valve four (361), the fourth liquid cooling pipe is installed with a fourth bypass pipe (8), the fourth bypass pipe (8) is installed with a fourth bypass solenoid valve (81), and the end of the fourth bypass pipe (8) is installed with a second waterproof and breathable membrane (82).

8. The power battery system for a new energy shunting locomotive according to claim 1, characterized in that: The first liquid cooling branch pipe (33) includes a first hose (332) and a first plug (333) from top to bottom, the fourth liquid cooling branch pipe (36) includes a fourth hose (362) and a fourth plug (363) from top to bottom, the first fire extinguishing medium branch pipe (43) includes a second hose (431) and a second plug (432) from top to bottom, the first plug (333), the second plug (432) and the fourth plug (363) are all installed and fixed on the adjustment seat (51), a flow channel is formed in the liquid cooling plate, and the flow channel is formed with a liquid inlet and a liquid outlet, the second liquid cooling branch pipe (34) is connected to the liquid inlet, and the third liquid cooling branch pipe (35) is connected to the liquid outlet.

9. The power battery system for a new energy shunting locomotive according to claim 1, characterized in that: The first liquid cooling pipe is installed with a circulation pump (39), the fire extinguishing medium pipeline (42) is installed with a spray pump, the battery rack (1) includes a plurality of installation stations, the battery standard box (2) is installed in the installation station, the battery rack (1) includes a support frame (11) located at the bottom of the installation station, the battery standard box (2) is installed in the support frame (11), the battery rack (1) is installed with a linear motor, the linear motor is used to drive the support frame (11) to move, the battery rack (1) is installed with a connector 1, the battery standard box (2) is installed with a connector 2, and the connector 1 is in contact with the connector 2.

10. The power battery system for a new energy shunting locomotive according to claim 7, characterized in that: It also includes a control system, the second electric push rod (75) is wirelessly connected to the control system, and the battery standard box (2) supplies power to the second electric push rod (75).

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