Vehicle electric quantity sharing system
Through the vehicle power sharing system, charging piles are used to follow the movement of vehicles to achieve fast and efficient charging and discharging of medium and large electric construction machinery, solving the problems of inconvenient movement and high costs and simplifying the equipment structure.
Patent Information
- Application Number
- CN202422939879.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2034-11-28
AI Technical Summary
Mobile charging equipment for medium and large electric engineering machinery is heavy and bulky, making it inconvenient to transport. The existing all-in-one technology has a complex structure and high cost, making it difficult to achieve fast and efficient charging and discharging.
A vehicle power sharing system is designed to achieve power sharing between vehicles through a group of charging docks. The charging pile follows the first vehicle to move to the second vehicle to charge or discharge it. It includes the connection of the battery packs, junction boxes, battery management systems and charging docks of the first and second vehicles, and supports a charge and discharge rate of 0.5C.
It achieves fast and efficient charging and discharging of medium and large electric engineering machinery, solves the problem of inconvenient mobility, simplifies the equipment structure and reduces development costs.
Smart Images
Figure CN223327344U_ABST
Abstract
Description
Technical Field
[0001] The embodiments of the present utility model relate to the technical field of electric engineering machinery, and in particular to a vehicle power sharing system. Background Art
[0002] Electric construction machinery has the advantages of environmental protection and energy saving, zero emissions, low noise, high efficiency and low maintenance costs, and is being used more and more widely. However, due to factors such as high power consumption and uncertain operating conditions of construction machinery, how to quickly replenish energy is a technical problem that the industry urgently needs to solve, especially for crawler or steel-wheeled electric construction machinery that are inconvenient to move.
[0003] However, mobile power banks (POWER UNIT) are popular in the construction machinery industry. They are indeed effective for micro and small construction machinery (usually less than 100 kWh), but they are somewhat useless for medium and large electric construction machinery. For example, a 500 kWh mobile power bank weighs about 7 tons and has a large size, which makes it inconvenient to transport, increases the difficulty and cost of operation, and seriously hinders its promotion and application.
[0004] Currently, charging stations for electric products can only be used for charging. Discharging requires an external discharge device called a power distribution unit (PDU). Existing technologies all use low-power external discharge. If the discharge power needs to be increased (similar to the high-power charging, usually around 1C), assuming dual-gun charging, the all-in-one device requires the addition of four large cables and corresponding relay controls, as well as two socket interfaces. This results in a complex structure, larger size, and high custom development costs. The overall vehicle layout also becomes difficult. Utility Model Content
[0005] The utility model provides a vehicle power sharing system, which can charge the vehicle battery and discharge the battery to the outside through a set of charging bases.
[0006] The embodiment of the utility model provides a vehicle power sharing system, comprising: a first vehicle, a charging pile, and a second vehicle;
[0007] The first vehicle is provided with a first battery pack, a first high-voltage junction box, a first battery management system, and a first charging seat group; the first high-voltage junction box is connected to the first battery pack, the first battery management system, and the first charging seat group respectively; the charging pile is connected to the first charging seat group of the first vehicle via a first charging gun; the first battery management system is used to identify charging signals or discharging signals from the charging pile; the first high-voltage junction box is used to aggregate and control the current of the battery pack;
[0008] The second vehicle is provided with a second battery pack, a second high-voltage junction box, a second battery management system, and a second charging seat group; the second high-voltage junction box is connected to the second battery pack, the second battery management system, and the second charging seat group respectively; the charging pile is connected to the second charging seat group of the second vehicle via a second charging gun; the second battery management system is used to identify a discharge signal or a charging signal from the charging pile; the second high-voltage junction box is used to aggregate and control the current of the battery pack;
[0009] After the charging pile follows the first vehicle and moves to the second vehicle, the first vehicle charges or discharges the second vehicle through the charging pile.
[0010] Furthermore, the first vehicle is also provided with a first power distribution unit, which is connected to the first high-voltage junction box; the second vehicle is also provided with a second power distribution unit, which is connected to the second high-voltage junction box.
[0011] Furthermore, the number of the first charging seat groups is at least two; the number of the second charging seat groups is at least two.
[0012] Furthermore, when the first charging seat group is connected to the first charging gun, the first vehicle is triggered to be locked.
[0013] Furthermore, the first battery management system is also used to: when a discharge signal is detected, if the remaining power of the first battery pack supports the first vehicle to charge the second vehicle and return to the designated location after charging, then control the first vehicle to charge the second vehicle.
[0014] Furthermore, the first battery management system is further configured to: monitor the operating temperature of the battery during charging or discharging of the first battery pack;
[0015] The second battery management system is further used to monitor the battery operating temperature of the second battery pack during discharge or charging.
[0016] Furthermore, the charging pile is provided with a DC / AC inverter; the DC / AC inverter is used to provide AC power for the electric tool.
[0017] Furthermore, the charging rate is at least 0.5C; and the discharging rate is at least 0.5C.
[0018] Furthermore, the first vehicle is a wheeled vehicle, and the second vehicle is a tracked vehicle.
[0019] The present invention provides a vehicle power sharing system. The system includes: a first vehicle, a charging pile, and a second vehicle; the first vehicle is provided with a first battery pack, a first high-voltage junction box, a first battery management system, and a first charging seat group; the first high-voltage junction box is connected to the first battery pack, the first battery management system, and the first charging seat group respectively; the charging pile is connected to the first charging seat group of the first vehicle via a first charging gun; the first battery management system is used to identify charging signals or discharging signals from the charging pile; the first high-voltage junction box is used to aggregate and control the current of the battery pack; the second vehicle is provided with a second battery pack, a second high-voltage junction box, a second battery management system, and a second charging seat group; the second high-voltage junction box is connected to the second battery pack, the second battery management system, and the second charging seat group respectively; the charging pile is connected to the second charging seat group of the second vehicle via a second charging gun; the second battery management system is used to identify discharging signals or charging signals from the charging pile; the second high-voltage junction box is used to aggregate and control the current of the battery pack; after the charging pile moves with the first vehicle to the second vehicle, the first vehicle charges or discharges the second vehicle via the charging pile. Through the above technical solution, the charging pile of the first vehicle is used to charge or discharge the second vehicle, so that the vehicle-mounted battery can be charged or discharged through a set of charging bases, solving the problem of energy replenishment for crawler or steel-wheeled electric engineering machinery that is inconvenient to move during motor group operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 A schematic structural diagram of a vehicle power sharing system provided by an embodiment of the present utility model;
[0021] Figure 2 A schematic structural diagram of another vehicle power sharing system provided by an embodiment of the present utility model;
[0022] Figure 3 A schematic diagram of a charging and discharging process provided by an embodiment of the utility model;
[0023] Figure 4 A schematic diagram of a charging process provided by an embodiment of the present utility model;
[0024] Figure 5 A schematic diagram of the principle of vehicle power sharing provided in an embodiment of the utility model. DETAILED DESCRIPTION
[0025] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.
[0026] Figure 1 This is a schematic diagram of the structure of a vehicle power sharing system 100 provided by an embodiment of the present utility model. Figure 1 , the vehicle power sharing system 100 includes: a first vehicle 10, a charging pile 30 and a second vehicle 20;
[0027] The first vehicle 10 is provided with a first battery pack 101, a first high-voltage junction box 102, a first battery management system 103, and a first charging station group 104. The first high-voltage junction box 102 is connected to the first battery pack 101, the first battery management system 103, and the first charging station group 104 respectively. The charging pile 30 is connected to the first charging station group 104 of the first vehicle 10 via a first charging gun 40. The first battery management system 103 is used to identify charging signals or discharging signals from the charging pile 30. The first high-voltage junction box 102 is used to aggregate and control the current of the battery pack.
[0028] The second vehicle 20 is provided with a second battery pack 201, a second high-voltage junction box 202, a second battery management system 203, and a second charging station group 204. The second high-voltage junction box 202 is connected to the second battery pack 201, the second battery management system 203, and the second charging station group 204 respectively. The charging pile 30 is connected to the second charging station group 204 of the second vehicle 20 via a second charging gun 50. The second battery management system 203 is used to identify the discharge signal or the charging signal from the charging pile 30. The second high-voltage junction box 202 is used to aggregate and control the current of the battery pack.
[0029] After the charging pile 30 follows the first vehicle 10 and moves to the second vehicle 20 , the first vehicle 10 charges or discharges the second vehicle 20 through the charging pile 30 .
[0030] Specifically, the first vehicle 10 may include a first battery pack 101, a first high-voltage junction box 102, a first battery management system 103, and a first charging station group 104. The first battery pack 101 can be used to store electrical energy, and the first vehicle 10 may include one or more first battery packs 101; the first high-voltage junction box 102 can be used to aggregate and control the power current of the first battery pack 101; the first battery management system 103 can be a system for managing batteries. In this embodiment, the first battery management system 103 can be a battery management system (BMS). The BMS can intelligently manage and maintain each battery cell, prevent the battery from overcharging and over-discharging, extend the battery life, monitor the battery status, and monitor parameters such as current, voltage, and temperature. It can control the relay switch and control the charging and discharging process according to the charging and discharging signals; the first charging station group 104 can be a charging station group for charging the first battery pack 101. The number of first charging station groups 104 is at least two. For example, for medium and large machinery, the number of first charging station groups 104 can be 2.
[0031] Specifically, the second vehicle 20 may include a second battery pack 201, a second high-voltage junction box 202, a second battery management system 203, and a second charging station group 204. The second battery pack 201 can be used to store electrical energy, and the second vehicle 20 may include one or more second battery packs 201; the second high-voltage junction box 202 can be used to aggregate and control the power and current of the second battery pack 201; the second battery management system 203 can be a system for managing batteries, and in this embodiment, the second battery management system 203 can be a BMS; the second charging station group 204 can be a charging station group for charging the second battery pack 201. The number of second charging station groups 204 is at least two, for example, for medium to large machinery, the number of second charging station groups 204 can be two.
[0032] In this embodiment, the first vehicle 10 may be a wheeled vehicle, such as a medium-to-large wheel loader, and the second vehicle 20 may be a tracked vehicle, such as a tracked electric construction machine or a steel-wheeled electric construction machine that is difficult to move. The charging station 30 may be mounted on the first vehicle 10. For example, the charging station 30 may be mounted on the first vehicle 10, or the charging station 30 and the first vehicle 10 may be moved together by a forklift, so that the charging station 30 moves along with the first vehicle 10. The second vehicle 20 may be a vehicle that is difficult to move.
[0033] Continuing with the above description, the charging pile 30 can be connected to the first charging point group 104 in the first vehicle 10 through the first charging gun 40. When the first battery management system 103 detects the charging signal or discharge signal of the charging pile 30, the estimated remaining battery capacity (State of Charge, SOC) of the first vehicle 10 can be judged, wherein SOC can represent the ratio of the remaining power of the battery to its rated capacity, usually expressed as a percentage. SOC can be used to measure an important parameter of the battery charging state. The purpose of estimating SOC is to determine whether the first vehicle 10 can return to the starting point smoothly. The SOC value can be a user-defined value or a pre-set value. For example, the pre-set value can be 40% or 30%, which can ensure that the battery will not be over-discharged and ensure that the first vehicle 10 can return smoothly for charging after charging or discharging the second vehicle 20.
[0034] This embodiment provides a vehicle power sharing system, in which a charging pile can move with a first vehicle. After the charging pile moves with the first vehicle to a second vehicle, the second vehicle is charged or discharged through the charging pile, thereby realizing that a set of charging seats can charge the vehicle battery and discharge it to the outside, solving the problem of energy replenishment for crawler or steel-wheel electric engineering machinery that is inconvenient to move during motor group operation.
[0035] Optionally, when the first charging seat assembly 104 is connected to the first charging gun 40 , the first vehicle is triggered to be locked.
[0036] It should be noted that when the first charging seat group 104 is connected to the first charging gun 40, it can be considered that the gun plug signal is detected, which can trigger the first vehicle 10 to be locked, that is, the locking function of the first vehicle 10 is activated. The locking function of the first vehicle 10 may include: removing the travel motor, brake, and steering motor, and parking brake to ensure that the vehicle cannot be driven during charging or discharging.
[0037] Based on the above embodiments, Figure 2 This is a structural diagram of another vehicle power sharing system 100 provided in an embodiment of the present utility model.
[0038] Reference Figure 2 The first vehicle 10 is further provided with a first power distribution unit 105, which is connected to the first high-voltage junction box 102; the second vehicle 20 is further provided with a second power distribution unit 205, which is connected to the second high-voltage junction box 202.
[0039] Specifically, the first vehicle 10 may also be provided with a first power distribution unit 105, which may be connected to the first high-voltage junction box 102, and the first power distribution unit 105 may be used to distribute power to the first vehicle 10; the second vehicle 20 may also be provided with a second power distribution unit 205, which may be connected to the second high-voltage junction box 202, and the second power distribution unit 205 may be used to distribute power to the second vehicle 20.
[0040] Furthermore, the charging pile is provided with a DC / AC inverter; the DC / AC inverter is used to provide AC power for the electric tool.
[0041] It can be known that a DC / AC inverter may be provided in the charging pile 30, and the DC / AC inverter is used to provide AC power for the electric tool.
[0042] Furthermore, the first battery management system 103 is also used to: when a discharge signal is detected, if the remaining power of the first battery pack 101 supports the first vehicle 10 to charge the second vehicle 20 and return to the designated location after charging, then control the first vehicle 10 to charge the second vehicle 20.
[0043] Specifically, in this embodiment, when the first battery management system 103 detects a discharge signal, it can be understood that the first vehicle 10 needs to charge the second vehicle 20, and the remaining power of the first battery pack 101 can be confirmed. When the remaining power (SOC) of the first battery pack 101 cannot support the first vehicle 10 to charge the second vehicle 20 and return to the designated location after charging, the charging process is ended at this time; when the remaining power of the first battery pack 101 can support the first vehicle 10 to charge the second vehicle 20 and return to the designated location after charging, the first vehicle 10 can be controlled to charge the second vehicle 20.
[0044] Figure 3 A schematic diagram of a charging and discharging process is provided in this embodiment, as shown in FIG. Figure 3 As shown, when a gun plug signal is received, the first vehicle locking function can be activated to ensure charging safety. The first battery management system can determine whether a discharge signal is received. When a discharge request signal is not received, it can determine whether a charging signal is received. If a charging signal is not received, the charging and discharging process can be terminated. If a charging signal is received, the bus relay of the charging seat (first charging seat group) can be closed, the battery air conditioning system can be started, and the normal charging process can be carried out until charging is completed. When a discharge request signal is received, it can be determined whether the SOC of the first vehicle is higher than a preset threshold. If not, the discharge process can be terminated. If so, the discharge power and current information can be exchanged with the charging pile, and the bus relay of the charging seat (first charging seat group) can be closed to start the battery air conditioning system and the normal discharge process can be carried out.
[0045] Figure 4 A schematic diagram of a charging process provided in this embodiment is shown as follows: Figure 4 As shown, when the first battery management system detects the gun plug signal, it can start the vehicle locking function, and then when the discharge signal is detected, it can judge the SOC situation. When the SOC situation meets the discharge situation, the first vehicle can implement the whole vehicle discharge operation. When the charging signal is detected, the second vehicle can be charged in real time.
[0046] Optionally, during charging, the charging rate is at least 0.5C; during discharging, the discharging rate is at least 0.5C. The charging rate may be the ratio of the amount of electricity that a battery can receive or release per unit time to its rated capacity, where "C" may be the rated capacity of the battery. "C" may be a relative unit used to indicate the rate at which a battery charges or discharges. A charging rate of 0.5C may indicate that the battery is charging at half its rated capacity.
[0047] For example, if a battery has a rated capacity of 100 ampere-hours (Ah), a charge rate of 0.5C means the battery can be fully charged in 2 hours (because 100Ah / 0.5=200Ah / h, or 200 amperes per hour). If the battery is discharged at a rate of 1C, it can discharge 100Ah in 1 hour.
[0048] Furthermore, the first battery management system 103 is further configured to: monitor the battery operating temperature of the first battery pack 101 during charging or discharging;
[0049] The second battery management system 203 is further configured to monitor the operating temperature of the second battery pack 201 during the discharging or charging process.
[0050] It should be noted that the first battery management system 103 provided in this embodiment can also be used to monitor the operating temperature of the batteries in the first battery pack 101 during the charging or discharging process, thereby ensuring that the batteries operate within an optimal temperature range. For example, when the operating temperature of the batteries in the first battery pack 101 is too high, the battery cooling system can be used to cool the batteries to ensure that the batteries operate within the optimal temperature range.
[0051] Continuing with the above description, the second battery management system 203 provided in this embodiment can also be used to monitor the operating temperature of the batteries in the second battery pack 201 during charging or discharging, thereby ensuring that the batteries operate within an optimal temperature range. For example, when the operating temperature of the batteries in the second battery pack 201 is too high, the battery cooling system can be used to cool the batteries to ensure that the batteries operate within the optimal temperature range.
[0052] Figure 5 The schematic diagram of the principle of vehicle power sharing provided in this embodiment is as follows: Figure 5 As shown, the first vehicle and the second vehicle are charged and discharged through the charging pile. When the first battery management system detects the discharge signal, if the remaining power of the first battery pack supports the first vehicle to charge the second vehicle and return to the designated location after charging, the first vehicle is controlled to charge the second vehicle through the first charging seat group. The first high-voltage junction box is used to aggregate and control the current of the first battery pack, and the second high-voltage junction box is used to aggregate and control the current of the second battery pack. The charging pile includes a DC / DC inverter (DC / DC) and a DC / AC inverter (DC / AC). The charging pile can also provide AC power to other power tools through the DC / AC inverter (DC / AC). The first battery management system can be used to monitor the operating temperature of the second battery pack during the charging / discharging process.
[0053] In the vehicle power sharing system of this embodiment, the charging pile can move with the first vehicle. After the charging pile moves with the first vehicle to the second vehicle, the second vehicle is charged or discharged through the charging pile. This enables a set of charging seats to charge the vehicle battery and discharge it to the outside, solving the problem of energy replenishment for crawler or steel-wheeled electric engineering machinery that is inconvenient to move during motor group operation.
[0054] Note that the above are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of protection of the present invention. Therefore, while the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.
Claims
1. A vehicle power sharing system, characterized in that: include: A first vehicle, a charging pile, and a second vehicle; The first vehicle is provided with a first battery pack, a first high-voltage junction box, a first battery management system and a first charging seat group; The first high-voltage junction box is respectively connected to the first battery pack, the first battery management system, and the first charging station group; the charging pile is connected to the first charging station group of the first vehicle via a first charging gun; the first battery management system is used to identify charging signals or discharging signals from the charging pile; the first high-voltage junction box is used to aggregate and control the current of the battery pack; The second vehicle is provided with a second battery pack, a second high-voltage junction box, a second battery management system, and a second charging seat group; the second high-voltage junction box is connected to the second battery pack, the second battery management system, and the second charging seat group respectively; the charging pile is connected to the second charging seat group of the second vehicle via a second charging gun; the second battery management system is used to identify a discharge signal or a charging signal from the charging pile; the second high-voltage junction box is used to aggregate and control the current of the battery pack; After the charging pile follows the first vehicle and moves to the second vehicle, the first vehicle charges or discharges the second vehicle through the charging pile.
2. The system according to claim 1, wherein: The first vehicle is further provided with a first power distribution unit, which is connected to the first high-voltage junction box; the second vehicle is further provided with a second power distribution unit, which is connected to the second high-voltage junction box.
3. The system according to claim 1, wherein: The number of the first charging base groups is at least two; the number of the second charging base groups is at least two.
4. The system according to claim 1, wherein: When the first charging seat assembly is connected to the first charging gun, the first vehicle is triggered to be locked.
5. The system according to claim 1, wherein: The first battery management system is further used to: when a discharge signal is detected, if the remaining power of the first battery pack supports the first vehicle to charge the second vehicle and return to the designated location after charging, control the first vehicle to charge the second vehicle.
6. The system according to claim 1, wherein: The first battery management system is further configured to: monitor the operating temperature of the battery during charging or discharging of the first battery pack; The second battery management system is further used to monitor the battery operating temperature of the second battery pack during discharge or charging.
7. The system according to claim 1, wherein: The charging pile is provided with a DC / AC inverter; the DC / AC inverter is used to provide AC power for the electric tool.
8. The system according to claim 1, wherein: The charging rate should be at least 0.5C; the discharging rate should be at least 0.5C.
9. The system according to claim 1, wherein: The first vehicle is a wheeled vehicle, and the second vehicle is a tracked vehicle.