Device for realizing load discharge seamless switching of master and slave energy storage vehicles in off-grid state
By seamlessly switching between the two mobile energy storage vehicle systems and equipping them with SVG compensators and surge backup protectors, the problem of limited energy storage in energy storage vehicles is solved, enabling continuous power supply to motor loads and cost savings.
Patent Information
- Application Number
- CN202520021707.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-06
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-01-06
AI Technical Summary
Existing mobile energy storage vehicles have limited energy storage capacity, which cannot guarantee the continuous normal operation of the motor load, and the initial investment cost of the equipment is high.
The system employs a dual mobile energy storage vehicle (one master and one slave) system. The SOC is monitored by a meter. When the SOC of the master power supply vehicle reaches the set threshold, it is powered down and switched to the backup power supply vehicle to achieve seamless switching. It is equipped with an SVG compensator and a surge backup protector to ensure power continuity.
It enables seamless switching between dual power supplies in off-grid mode, ensuring continuous normal operation of the motor load and saving vehicle space and overall vehicle configuration costs.
Smart Images
Figure CN223729501U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a device for realizing seamless switching of master-slave energy storage vehicles to load discharge in off-grid state. BACKGROUND
[0002] Mobile energy storage vehicles can be widely applied in many fields such as urban construction, power engineering, communication engineering, fire fighting and rescue, medical and health care and commercial activities. For example, in urban construction, mobile energy storage vehicles can provide reliable temporary power supply for construction sites; in power engineering, mobile energy storage vehicles can switch power supply, replace power grid power supply and realize temporary power supply; in fire fighting and rescue, mobile energy storage vehicles can provide strong power support for rescue teams and ensure rapid and efficient rescue operation; in medical and health care, mobile energy storage vehicles can provide power support for mobile platforms, ambulances and field hospitals and ensure smooth development of medical and health care work. However, in the prior art, a single mobile energy storage vehicle has limited energy storage capacity and cannot guarantee continuous and normal operation of motor load. SUMMARY
[0003] In view of the above problems, the utility model provides a device for realizing seamless switching of master-slave energy storage vehicles to load discharge in off-grid state, which can effectively guarantee seamless switching of dual power supply to achieve uninterrupted power supply at the load end, improve the integration of the whole vehicle, reduce the initial investment cost of equipment and ensure the reliability of the application scene of the whole mobile energy storage vehicle system.
[0004] To achieve the above technical purposes and effects, the utility model realizes the following technical scheme:
[0005] A device for realizing seamless switching of master-slave energy storage vehicles to load discharge in off-grid state, comprising a mobile energy storage vehicle 1, a mobile energy storage vehicle 2 and a mobile power distribution cabinet, the mobile energy storage vehicle 1 is connected to an access and parallel connection point 1 of the mobile power distribution cabinet, the mobile energy storage vehicle 2 is connected to an access and parallel connection point 2 of the mobile power distribution cabinet, the outgoing terminal of the mobile power distribution cabinet is provided with a plurality of outgoing terminals for connecting terminal load, the outgoing terminals are connected in parallel with a surge backup protector and an SVG compensator, and the mobile power distribution cabinet is provided with a meter;
[0006] When running, one of the mobile energy storage vehicle 1 and the mobile energy storage vehicle 2 is set as a main power supply vehicle and the other is set as a standby power supply vehicle, when the meter monitors that the SOC of the main power supply vehicle reaches a set threshold value, the main power supply vehicle is powered off, and at the same time, the standby power supply vehicle seamlessly switches to become the main power supply vehicle and supplies power to the terminal load.
[0007] Preferably, the threshold value is 5% to 7%.
[0008] Preferably, the access point 1 is connected to the meter through a circuit breaker QF1, the access point 2 is connected to the meter through a circuit breaker QF2, and the meter is connected to the outgoing terminal of the mobile power distribution cabinet.
[0009] Preferably, the outgoing terminal of the mobile power distribution cabinet is connected in series with a circuit breaker.
[0010] Preferably, the SVG compensator is grounded.
[0011] Preferably, the surge backup protector is grounded.
[0012] The beneficial effects of the present application are:
[0013] In the off-grid state, the dual mobile energy storage vehicle (one master and one slave) of the present application can ensure seamless switching between the two power sources (<20ms), that is, the continuous normal operation of the motor load can be ensured during switching, realizing the consistency of the external output power of the dual power source, not only saving the vehicle body space, but also saving a large amount of cost in the overall vehicle configuration. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 is a structural schematic diagram of the device for realizing seamless switching of the master-slave energy storage vehicle to the load discharge in the off-grid state. DETAILED DESCRIPTION
[0015] The technical scheme of the present application will be further described in detail below in combination with the drawings and specific embodiments, so that those skilled in the art can better understand the present application and implement it, but the embodiments are not limiting the present application.
[0016] As shown in Figure 1 , a device for realizing seamless switching of the master-slave energy storage vehicle to the load discharge in the off-grid state, comprising a mobile energy storage vehicle 1, a mobile energy storage vehicle 2 and a mobile power distribution cabinet, the mobile energy storage vehicle 1 is connected to the access point 1 of the mobile power distribution cabinet, the mobile energy storage vehicle 2 is connected to the access point 2 of the mobile power distribution cabinet, that is, the mobile energy storage vehicle 1 and the mobile energy storage vehicle 2 are connected to the mobile power distribution cabinet at the same time to form a dual mobile energy storage vehicle (one master and one slave).
[0017] The outgoing terminal of the mobile power distribution cabinet (the bottom end in Figure 1 is provided with a plurality of outgoing terminal for connecting terminal load, Figure 1 , only two outgoing terminals are shown, preferably, the outgoing terminal of the mobile power distribution cabinet is connected in series with a circuit breaker, corresponding Figure 1 , then: motor outgoing line 1 is connected to terminal load 1 through circuit breaker QF21, and motor outgoing line 2 is connected to terminal load 2 through circuit breaker QF22.
[0018] The outgoing terminals are respectively connected in parallel with a surge backup protector and an SVG compensator, preferably, the SVG compensator is grounded, and the surge backup protector is grounded.
[0019] The SVG 100k var is a low-voltage dynamic SVG (Static Var Generator SVG) compensator, mainly used for reactive power compensation, power factor improvement, and power quality optimization, with continuously adjustable compensation output.
[0020] The surge backup protector is mainly used for protecting electrical equipment from damage caused by transient overvoltage (such as lightning, power grid switching, static discharge, etc.), and when overcurrent or short circuit is detected, it will quickly respond to cut off the circuit, thereby protecting the equipment and system.
[0021] The mobile power distribution cabinet is provided with a meter, Figure 1 In the embodiment, the access and parallel connection point 1 is connected with the meter through a circuit breaker QF1, the access and parallel connection point 2 is connected with the meter through a circuit breaker QF2, and the meter is connected with the outgoing terminals of the mobile power distribution cabinet.
[0022] When running, one of the mobile energy storage vehicles 1 and 2 is set as the main power supply vehicle and the other is set as the standby power supply vehicle, when the meter detects that the SOC of the main power supply vehicle reaches the set threshold, the main power supply vehicle is powered off, and the standby power supply vehicle seamlessly switches to the main power supply vehicle and supplies power to the terminal load.
[0023] Preferably, the threshold is 5% to 7%, when the SOC (percentage of power) of the main power supply vehicle reaches the threshold, the main power supply vehicle is powered off, the standby power supply vehicle seamlessly switches to the main power supply vehicle and supplies power to the load, at this time, the energy storage vehicle that has been powered off can be withdrawn from the mobile power distribution cabinet to the charging station for charging, and the cycle is repeated.
[0024] In the off-grid state, the dual mobile energy storage vehicles (one master and one slave) of the new type can ensure seamless switching (<20ms) between the two power supplies, that is, the continuous normal operation of the motor load can be ensured during switching, realizing the consistency of the external output power of the dual power supply, not only saving the vehicle body space, but also saving a large amount of cost in the whole vehicle configuration.
[0025] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, any equivalent structure or equivalent process transformation using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.
Claims
1. A device for realizing seamless switching of master-slave energy storage vehicles discharging to loads in an off-grid state, characterized in that, The mobile energy storage vehicle 1 is connected to the access and parallel connection point 1 of the mobile power distribution cabinet, the mobile energy storage vehicle 2 is connected to the access and parallel connection point 2 of the mobile power distribution cabinet, the outgoing terminal of the mobile power distribution cabinet is provided with a plurality of outgoing terminals for connecting terminal loads, the outgoing terminals are respectively connected in parallel with a surge backup protector and an SVG compensator, and the mobile power distribution cabinet is provided with a meter; During operation, one of the mobile energy storage vehicles 1 and 2 is set as a main power supply vehicle and the other is set as a standby power supply vehicle; when the meter detects that the SOC of the main power supply vehicle reaches a set threshold value, the main power supply vehicle is powered off, and the standby power supply vehicle is seamlessly switched to become the main power supply vehicle and supplies power to the terminal load.
2. The device for realizing seamless switching of load discharge between master and slave energy storage vehicles in off-grid state according to claim 1, characterized in that, The threshold value is 5% to 7%.
3. The device of claim 1, wherein, The access and parallel connection point 1 is connected to the meter through a circuit breaker QF1, the access and parallel connection point 2 is connected to the meter through a circuit breaker QF2, and the meter is connected to the outgoing terminal of the mobile power distribution cabinet.
4. The device for realizing seamless switching of load discharge between master and slave energy storage vehicles in off-grid state according to claim 3, characterized in that, The outgoing terminals of the mobile power distribution cabinet are respectively connected in series with circuit breakers.
5. The device for realizing seamless switching of discharging load by master-slave energy storage vehicles in off-grid state according to claim 4, characterized in that, The SVG compensator is grounded.
6. The device for realizing seamless switching of load discharge between master and slave energy storage vehicles in off-grid state according to claim 4, characterized in that, The surge backup protector is grounded.