WO2017181921A1

WO2017181921A1 - Transient dynamic power compensator, combined-type super battery, and method for compensating power supply

Info

Publication number: WO2017181921A1
Application number: PCT/CN2017/080739
Authority: WO
Inventors: 庄淑君; 霍国平; 孙艺嘉; 庄胤; 杨胜杰; 路永广; 张晓丽; 梁亚丽
Original assignee: 洛阳尹太科智能科技有限公司
Priority date: 2016-04-18
Filing date: 2017-04-17
Publication date: 2017-10-26

Abstract

Provided are a transient dynamic power compensator, combined-type super battery, and method for compensating power supply; an electrical device is divided into a power electrical unit and a non-power electrical unit; in the power electrical unit, only the power unit of the transient dynamic power compensator (3) supplies power; in the non-power electrical unit, the energy unit connected in parallel to the transient dynamic power compensator (3) supplies power, so as to achieve a match and a balance between the energy supply side and the energy demand side. the transient dynamic power compensator (3) comprises a connected power unit (8) and an isolated charging unit (9); Only using the power unit (8) to supply power to the power electrical unit solves current problems such as using the energy unit to supply power to the power electrical unit and thus causing the energy unit to be "over-provisioned", and the current shock on the energy unit being large such that the service life of the energy unit is reduced; at the same time, using the power unit (8) to carry transient dynamic high-power tasks improves the operating performance of the power electrical unit and improves the voltage stability of the power supply system.

Description

Transient power compensator, combined super battery and compensation power supply method

Technical field

The invention relates to a transient power power compensator, a combined super battery and a compensation power supply method, and belongs to the technical field of circuit systems.

Background technique

For the power type electric unit, a lead-acid battery with a large capacity is currently used as an energy unit for power supply, and a power-type electric unit needs a transient high current when starting, in order to meet the requirements for starting the power type electric unit. Transient high-power requirements, have to "over-provision" lead-acid batteries, making the battery large and bulky, both waste resources and not economical. At the same time, due to the large starting current of the power type electric unit, the current impact on the lead-acid battery is large, causing the active material of the positive electrode plate to fall off, so that the capacity of the lead-acid battery pack decreases rapidly, and the service life is short (generally 2 to 3 years). ), replacement is more frequent, increasing the maintenance workload and cost of user equipment. Moreover, lead-acid batteries mainly contain sulfuric acid and heavy metal lead, which are very polluting to the ecological environment, and bring about a high risk of social costs and environmental pollution such as recycling and disposal of used batteries.

Taking an internal combustion engine vehicle as an example, a battery as an energy unit is one of the indispensable power sources for an internal combustion engine vehicle, and supplies power to the starter motor when the vehicle internal combustion engine is started; when the engine is not working or the engine is operating at a low speed, the battery is not powered. The type power unit supplies power; when the power of the non-power type power unit exceeds the power of the power generator, the battery and the generator jointly supply power to the non-power type power unit. As shown in FIG. 1, the power supply system of the internal combustion engine vehicle includes a starter motor 1, a start switch 2, a battery 4, a vehicle power consumption device 5, an onboard generator 6 and a voltage regulator 7, and the battery 4 is connected to the starter motor 1 through a start switch 2. The battery 4 is connected in parallel with the vehicle power consumption device 5 and the vehicle-mounted generator 6. When the internal combustion engine is started, the start switch 2 is closed, and the battery 4 is used to supply power to the starter motor. After the internal combustion engine is started, the start switch 2 is turned off, and the battery is consumed by the vehicle. The device is powered. The battery must bear the starting task of starting the motor and the power supply for the power consuming device. The different electrical characteristics of the two types of electrical load have different requirements on the performance of the battery: the starting motor as the power type electric unit requires excellent battery discharge rate performance. And other loads are used as non-power type power units. If the battery has a certain capacity, the rate performance requirement is not high. This situation causes the battery to meet the transient high power required for the cold start of the engine, and has to be "over-configured", making the battery large and cumbersome, not only wasting resources, but also uneconomical. When the battery is responsible for starting the power-type power unit of the motor, it needs to withstand the impact of the large current of the starting motor, causing damage to the battery, affecting the service life of the battery, and the battery or the maintenance personnel cannot accurately confirm the battery usage during use of the battery. The state is usually based on whether the vehicle is started smoothly after the night is used as a criterion for determining whether the battery life is terminated. Instead of the battery being unable to store electricity or failing to supply the non-power type power unit as the battery scrapping standard, the battery is "over". Early rejection."

To this end, it has been proposed to connect the supercapacitors at both ends of the battery to supply power to the power-type power unit. Although this solution extends the service life of the battery to a certain extent, the battery still has to bear the power-type power unit. Starting the task does not fundamentally solve the problem that the battery is powered by the power type power unit, causing a large impact on the battery current, resulting in a decrease in battery life; and the improvement due to the voltage "clamping" problem of the battery and the power type power unit. Improvements to the starting problem of internal combustion engines are also limited.

Summary of the invention

The object of the present invention is to provide a transient power power compensator to solve the problem that the power unit is powered by the power unit and the energy unit is “over-configured”, and the current impact on the energy unit is large, resulting in a decrease in energy unit life. The invention also provides a combined super battery and electrical system compensation power supply method.

The present invention provides a transient power power compensator for solving the above technical problem, and the transient power power compensator includes a main compensation circuit connected by a power unit and an isolated charging unit, and both ends of the main compensation circuit are used for And an energy unit for powering the power type power unit, wherein the isolated charging unit is configured to charge the power unit when the power unit power is lower than a set value or before the power type power unit operates, in other The current path of the power unit and the energy unit is disconnected, and the power unit is a high-rate discharge energy storage device.

The isolated charging unit includes a charging circuit, and the charging circuit is an AC-DC-AC-DC switching power supply. Road, AC-DC switching circuit, DC-AC-DC switching circuit or DC-DC switching circuit.

The AC-DC-AC-DC switch circuit comprises an input rectification filter circuit, a high-frequency transformer and an output rectification filter circuit which are sequentially connected, and an input end of the input rectification filter circuit is used for connecting an AC input, and is processed by the switch circuit It is then converted to a DC input that is compatible with the power unit to the power unit.

The AC-DC switching circuit comprises a transformer, a rectifying and filtering circuit and a voltage stabilizing and current limiting circuit connected in sequence. The input end of the switching circuit is used for connecting an AC input, and is converted into a power unit after being processed by the switching circuit. The supplied DC power is input to the power unit to charge the power unit.

The DC-AC-DC switching circuit comprises a high-frequency transformer and an output rectifying and filtering circuit which are sequentially connected, and one side of the high-frequency transformer is used for connecting a DC input, and is converted into a power unit by being processed by the switching circuit. The DC power is input to the power unit to charge the power unit.

The DC-DC switching circuit comprises a voltage conversion circuit and a voltage limiting and current limiting circuit connected in sequence, and the input end of the voltage conversion circuit is used for connecting a DC input, and is converted into a DC power matched with the power unit after being processed by the switching circuit. Input to the power unit to charge the power unit.

The power unit is a supercapacitor cell, a module consisting of a series or a parallel connection of supercapacitor cells, or a capacitor array.

The present invention also provides a combined super battery comprising a transient power power compensator and an energy unit in parallel with the transient power power compensator, the transient power power compensator comprising a power unit and The isolated charging unit is connected to form a main compensation circuit, and the two ends of the main compensation circuit are connected to the energy unit, wherein the power unit is used for powering the power type electric unit, and the isolated charging unit is used for lowering the power unit. The power unit is charged before the start of the power type or the power type unit, and the current path of the power unit and the energy unit is disconnected at other times, wherein the power unit is a high-rate discharge energy storage device, and the energy unit is Energy storage device.

The isolated charging unit comprises a charging circuit, and the charging circuit is an AC-DC-AC-DC switching circuit, an AC-DC switching circuit, a DC-AC-DC switching circuit or a DC-DC switching circuit.

The power unit is a super capacitor unit, a module or a capacitor array composed of a series and a parallel connection of super capacitors; the energy unit is a lead acid battery, a nickel hydrogen battery, a lithium manganate battery, a lithium iron phosphate battery, and the third A battery or a lithium titanate battery.

The invention also provides an electric system compensation power supply method, which divides the electric equipment according to the power characteristics, and is divided into a power type electric unit and a non-power type electric unit, and the power type electric unit is only powered by the power unit. The non-power type power unit is powered by the energy unit, and the power unit and the energy unit are electrically isolated by the isolated charging unit. When the power unit is lower than the set value or the power type power unit is operated, the power unit is isolated. The charging unit is charged by the energy unit or an external power source, and at other times, the current path of the power unit and the energy unit is disconnected, the energy unit is an energy storage device, and the power unit is a high-rate discharge energy storage device. .

The electrical system for the compensation power supply method includes a starter motor that is connected to a transient power power compensator through a contact of the electromagnetic switch, and is supplied by a power unit in the transient power power compensator. The coil of the electromagnetic switch and the starter relay coil are connected to the transient power power compensator or the energy unit, and are powered by the energy unit or the power unit.

The isolated charging unit is provided with an anti-backup function, and the power unit is prohibited from being discharged to the energy unit. The isolated charging unit comprises a charging circuit, and the charging circuit is an AC-DC-AC-DC switching circuit, an AC-DC switching circuit, a DC-AC-DC switching circuit or a DC-DC switching circuit.

The invention has the beneficial effects that the power device is divided into a power type electric unit and a non-power type electric unit, and the power type electric unit is only powered by the power unit in the transient power compensator, and the non-power type The power unit is powered by an energy unit connected in parallel with the transient power compensator to achieve matching and balance between the energy supply side and the energy demand side, thereby achieving various purposes, thereby solving a series of problems existing in the original power supply system. . The transient power compensator includes a series connected power unit and an isolated charging unit, wherein the power unit is used to connect the power type power unit, and the isolated charging unit is configured to disconnect the power unit and the energy when the energy unit does not charge the power unit. The current path of the unit is used to charge the power unit before the power type power unit operates or when the power unit has insufficient power. The power unit is an energy storage device capable of high rate discharge. The invention solves the problem that the energy unit is powered by the power unit and the power unit is “over-distributed” due to the power unit being powered by the power unit, and the current impact on the energy unit is large, resulting in a decrease in the life of the energy unit. Such problems prevent the power-type power unit from starting due to excessive discharge of the energy unit, and at the same time, the power unit is used for the transient high-power operation task, and the performance of the power-type power unit can be improved.

At the same time, since the energy unit no longer bears the power characteristic task of the power type power unit, the energy unit only needs to have a certain capacity, and the rate performance requirement is not high, and the selected energy unit can appropriately reduce the volume and weight thereof. The slimming of the type configuration saves resources and reduces environmental pollution and post-disposal costs.

In the transient power compensator of the present invention, the isolated charging unit has an anti-backup function, and the power unit cannot discharge to the energy unit at any time.

DRAWINGS

1 is a schematic structural view of an electrical system of an internal combustion engine vehicle;

Figure 2-a is a schematic structural view of a transient power power compensator;

Figure 2-b is a schematic structural view of a transient power compensator;

Figure 3-a is a schematic structural view of a combined super battery;

Figure 3-b is a schematic structural view of a combined super battery;

FIG. 4-a is a schematic structural diagram of an AC-DC-AC-DC switch circuit according to an embodiment of the present invention; FIG.

FIG. 4-b is a schematic structural diagram of an AC-DC switch circuit according to an embodiment of the present invention; FIG.

FIG. 5-a is a schematic structural diagram of a DC-AC-DC switch circuit according to an embodiment of the present invention; FIG.

FIG. 5-b is a schematic structural diagram of a DC-DC switch circuit according to an embodiment of the present invention; FIG.

6 is a schematic structural view of an electric system of an internal combustion engine vehicle to which the transient power compensator of the present invention is applied.

detailed description

The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings.

The invention divides the electric equipment into a power type electric unit and a non-power type electric unit. In the same electric system, the power type electric unit and the non-power type electric unit are relative concepts, and the power type electric unit has the The power consumption characteristics of short power consumption (less than 10 seconds), high power (rated current is generally above tens of amps), such as internal combustion engine starting motor in internal combustion engine vehicles; non-power type electric units have continuous power consumption time Long-term, low-power (rated current is generally below tens of amperes) electrical characteristics, such as various types of lights in the electrical system of internal combustion engine vehicles, cigarette lighter, air conditioner, horn, wiper, window lift, electronic instrument Disk and so on. The power-type power unit is powered only by the power unit in the transient power power compensator, and the non-power type power unit is powered by the energy unit in parallel with the transient power power compensator. For switchgear such as electromagnetic switches and relays, because the power consumption in the control loop is very low, it is neither a power type power unit nor a non-power type power unit. Therefore, it can be powered by the power unit. Energy unit powered by. In the above manner, the present invention can achieve matching and balance between the energy supply side and the energy demand side, optimize the electrical system, extend the life of the power supply unit, improve system performance, reduce resource waste and system maintenance workload, and reduce weight and higher. The adoption of efficient power units enables energy saving and emission reduction.

Embodiment of a transient power power compensator of the present invention

In this embodiment, the transient power compensator includes a main compensation circuit connected by the power unit 8 and the isolated charging unit 9, as shown in FIG. 2-a, the two ends of the main compensating circuit are used to connect the energy unit, energy. The unit uses a battery 4, and the power unit is used to supply power to the power type power unit. The isolated charging unit 9 is used to charge the power unit when the power unit power fails to reach the set value or before the power type power unit is started. The current path of the power unit and the energy unit is disconnected, and the negative pole of the power unit in the main compensation circuit is used for common ground connection with the negative pole of the energy unit.

The power unit is a high-rate discharge energy storage device, where the high-rate discharge energy storage device is relative to the energy unit, and the energy unit is a high-energy density, low-power density energy-type energy storage device, such as a lead-acid battery. And so on, can continue to discharge; and the power unit is for the power type electric unit, which can provide transient high current. Therefore, the power unit is a supercapacitor cell, a module or a capacitor array consisting of a series and a parallel connection of supercapacitor cells, as shown in Figure 2-a. It can also be a battery with high rate discharge characteristics, such as a lithium ion battery (lithium iron phosphate, ternary system, lithium manganate, lithium titanate, etc.), and a wound high-rate lead-acid battery, as shown in Figure 2-b. Shown.

The isolated charging unit has the functions of isolation and charging, can electrically isolate the power unit 8 and the energy unit, and can also charge the power unit 8, and the isolated charging unit can charge the power unit through the energy unit or the generator. The power unit can also be charged by an external AC or DC power source. The charging circuit of the isolated charging unit is an AC-DC-AC-DC switching circuit, an AC-DC switching circuit, and a DC-AC-DC switching circuit, depending on the type of charging input. Or DC-DC switching circuit.

When AC input is used, for example, the city power grid, the isolated charging unit adopts an AC-DC-AC-DC switching circuit. The specific structure is shown in Figure 4-a, including the input rectification and filtering circuit, the high-frequency transformer and the output. The flow filter circuit has a corresponding control circuit, and the AC input is connected to the power unit via the switch circuit. The processing is as follows: the AC input is rectified and filtered by the rectifying and filtering circuit, and then converted into DC, and then enters the high-frequency transformer for inverter and high-frequency conversion processing, outputs the AC power after the frequency conversion, and finally enters the output rectification and filtering circuit. The output rectification and filtering circuit rectifies and filters the converted alternating current to obtain a direct current adapted to the power unit to charge the power unit. The charging process of the switching circuit is controlled by the control circuit according to the voltage loop and the signal collected by the current loop to the switching circuit through the driving circuit. At the same time, in order to achieve protection of the switching circuit, the isolated charging unit is also provided with a protection circuit.

When the isolated charging unit adopts an AC-DC switching circuit, the specific circuit thereof is as shown in FIG. 4-b. The switching circuit includes a transformer, a rectifying and filtering circuit, and a voltage limiting and current limiting circuit connected in sequence, and the AC power is connected through the switching circuit. Power unit. The processing process of the switching circuit is as follows: after the AC power is transformed by the transformer, the rectifier circuit is rectified and filtered by the rectifying and filtering circuit, and is input to the power unit through the voltage limiting and current limiting circuit to realize charging of the power unit. . The control of the switching circuit can be realized by setting a switch on the switching circuit, and in order to realize protection of the switching circuit, the isolated charging unit is further provided with a protection circuit.

When the isolated charging unit adopts a DC-AC-DC switching circuit, the specific circuit structure thereof is as shown in FIG. 5-a, including a high-frequency transformer and an output rectifying and filtering circuit sequentially connected, and a corresponding control circuit, and the DC input is passed through the switch. The circuit is connected to the power unit. The processing procedure of the switching circuit is as follows: the high-frequency transformer inverts and frequency-converts the DC input, and inputs the converted AC power to the output rectification and filtering circuit, and rectifies and filters the AC power after the conversion by the output rectification and filtering circuit. A DC power is obtained that is adapted to the power unit to charge the power unit. The entire switching circuit is controlled by a control circuit that controls the signal collected by the voltage loop and the current loop to the switching circuit through the driving circuit. At the same time, in order to achieve protection of the switching circuit, the isolated charging unit is also provided with a protection circuit.

When the isolated charging unit adopts a DC-DC switching circuit, the specific circuit structure is as shown in FIG. 5-b, including a voltage conversion circuit and a voltage limiting and current limiting circuit connected in sequence, and the DC input is connected to the power meter through the switching circuit. The element is charged. The processing procedure of the switching circuit is as follows: after the DC input is transformed by the voltage conversion circuit, the voltage regulator and the current limiting circuit are input, and the DC power matched with the power unit is obtained through the voltage stabilization and current limiting circuit, and input to the power unit, thereby realizing Charging the power unit. The control of the switching circuit can be realized by setting a switch on the switching circuit, and in order to realize protection of the switching circuit, the isolated charging unit is further provided with a protection circuit.

The isolated charging unit can select different charging structures according to different charging input types. When the charging input type has both an AC input and a DC input, the switching circuit corresponding to the DC input and the switching circuit corresponding to the AC input can be combined.

In addition, the transient power power compensator of the present invention further includes a peripheral circuit including a detecting circuit, a protection and equalization circuit, and a management and display module connected to the power unit, and detecting the power of the power unit in real time through the detecting circuit. Through the protection and equalization circuit, the power unit's equalization protection, charging protection, discharge protection, overvoltage protection, undervoltage protection, overcurrent protection, overtemperature protection and short circuit protection functions are realized, and the power unit is realized through the management and display module. Management and parameter display. The detection circuit, the protection and equalization circuit, and the management and display module can be designed according to the functions that need to be implemented. The implementation of each functional circuit is a conventional technical means for those skilled in the art, and no specific circuit description is given here.

Embodiment of the combined super battery of the present invention

The combined super battery of the present invention comprises a main compensation circuit connected by the power unit 8 and the isolated charging unit 9. The two ends of the main compensation circuit are connected with an energy unit, and the energy unit uses the battery 4, as shown in Figure 3-a and Figure 3- As shown in b, the power unit 8 is used for powering the power type power unit, the energy unit is used for powering the non-power type power unit, and the isolating charging unit 9 is used when the power unit power does not reach the set value or the power type. The power unit is charged before starting, and the current path of the power unit and the energy unit is disconnected at other times. The negative pole of the power unit in the main compensation circuit is used to be connected to the negative pole of the energy unit. The specific device or circuit structure employed by the power unit 8, the energy unit and the isolated charging unit 9 has been implemented in a transient power compensator The details are described in the example and will not be described here.

Embodiment of an electric system compensation power supply method of the present invention

The transient power power compensation power supply method of the present invention divides the electrical equipment according to the power characteristics, and is divided into a power type power unit and a non-power type power unit, and the power type power unit is powered by the power unit, and the non-power type power is used. The unit is powered by the energy unit, and the power unit and the energy unit are electrically isolated by the isolated charging unit. When the power unit is lower than the set value or the power type power unit is started, the power unit is controlled by the isolated charging unit. The energy unit or the external power source is charged, and the current path of the power unit and the energy unit is disconnected at other times. The isolated charging unit also has an anti-backup function, and the power unit is prohibited from discharging to the energy unit. The specific implementation means and working process of the method have been detailed in the embodiment of the transient power power compensator, and will not be described herein.

In addition, the electrical system for the compensation power supply method includes a starter motor, and the starter motor is connected to the transient power power compensator through the contact of the electromagnetic switch, and is powered by the power unit in the transient power power compensator, and the coil of the electromagnetic switch and The starter relay coil is connected to a transient power power compensator or energy unit and is powered by an energy unit or a power unit.

The transient power compensator and the combined super battery of the invention can be applied to a power supply system of an internal combustion engine mounted device (such as a vehicle, a ship, an airplane, a locomotive, an internal combustion engine generator, etc.), and can also be applied to a pure electric vehicle and wireless communication. In the field of equipment, emergency power supply, etc., when used, the power unit in the transient power compensator can be connected to the power type electric unit (such as the starting motor of the internal combustion engine), and the two ends of the main compensating circuit are used for parallel connection. Both ends of a battery as an energy unit in an electrical system of an internal combustion engine vehicle.

The following describes a transient power compensator applied to an internal combustion engine vehicle electrical system. As shown in FIG. 6, the internal combustion engine vehicle power supply system includes a starter motor 1, a start switch 2, a transient power compensator 3, a battery 4, and a vehicle. The power consuming device 5, the onboard generator 6 and the voltage regulator 7, the transient power compensator 3 is connected to the battery 4, and the starter motor is used as the power type electric unit in the power supply system, and the transient power compensator 3 passes The start switch 2 is connected to the starter motor 1 for supplying electric power to the starter motor 1, the battery 4 In parallel with the vehicle power consuming device 5 and the vehicle generator 6, the voltage regulator 7 is used to adjust the output voltage of the generator to achieve stable output of the generator voltage.

The start switch 2 adopts a starter relay, and the starter motor is also connected with an electromagnetic switch. The starter motor 1 is connected to the transient power compensator 3 through the contact of the electromagnetic switch and the contact of the starter relay, which is composed of the transient power compensator 3 The power unit is powered; the coil of the electromagnetic switch and the starter relay coil are used as devices with extremely low power consumption, and can be powered by the power unit in the transient power compensator 3 or by the battery 4. The transient power compensator 3 is used to ensure that the power unit 8 is disconnected from the battery 4 during startup, and the power unit 8 supplies power to the starter motor 1 and cannot supply power to the vehicle power consuming device 5 and the battery 4; the transient power compensator 3 The power unit 8 and the battery 4 are turned on when the power unit 8 is insufficient or before the start of the motor 1 is started, and the power unit is charged by the vehicle generator or the battery; the transient power compensator 3 ensures the power unit 8 and the battery after the vehicle is turned off. 4 disconnected; thus, the power unit 8 and the battery 4 perform their duties according to their characteristics, respectively satisfying different load characteristic requirements, and fully exerting their advantages.

The working process of the power supply system is as follows: Before the internal combustion engine is started, the battery 4 or the external power source first charges the power unit 8; when the internal combustion engine is started, the current path between the power unit 8 and the battery 4 has been disconnected through the isolated charging unit 9. The power unit 8 or the battery 4 supplies power to the coil of the electromagnetic switch and the start relay coil, so that the electromagnetic switch contact and the start switch 2 are closed, and only the power unit 8 supplies power to the starter motor 1, and the starter motor starts the internal combustion engine of the vehicle; when the internal combustion engine starts After the completion, the start switch 2 is disconnected, and the isolation charging unit 9 determines whether the power unit 8 is sufficient. If not, the onboard generator 6 charges the power unit 8 through the isolated charging unit 9. If the power is sufficient, the battery is not charged; After that, the on-vehicle generator 6 starts to supply power to the vehicle-mounted power consuming device 5, and charges the battery 4 and charges the power unit 8 when the power is insufficient. When the vehicle-mounted generator 6 cannot meet the vehicle-mounted power consuming device 5, the battery 4 is The vehicle-mounted generator 6 supplies power to the vehicle-mounted power consuming device 5 together; when the vehicle-mounted generator 6 stops working, it controls the isolated charging. 9 OFF power element unit 8 is connected electrically between the battery 4, the power consumption when the vehicle-mounted device 5 continues to operate, the power required at this time is provided entirely by the battery 4; a charging unit includes a spacer reverse charge function, any Whenever the power unit 8 is unable to discharge to the battery 4, it is ensured that the power unit 8 can be subsequently activated.

It can be seen from the above application examples that the transient power compensator can replace the battery and provide power for the power type electric unit, so that the battery no longer undertakes the task of transient high power operation, and the battery is only responsible for the continuous supply of the low power load. It can avoid the battery from being impacted by large currents and improve the service life of the battery. At the same time, it can be “slimmed” in the battery selection configuration to achieve miniaturization and light weight. In addition, the transient power compensator is only used to power the power type power unit, and the isolated charging unit has an anti-back charge function, prohibiting the power unit from discharging to the energy unit, and having a certain protection effect on the power unit, and at the same time in the power unit. Before the power consumption unit is started, the transient power compensator is connected to the vehicle generator, external power supply or battery through the isolated charging unit for charging. At the same time, relying on the transient power compensator of the invention for starting, the engine startability is better, especially the low temperature startability is better, the battery does not have a transient large voltage drop, and the power supply system can stabilize the output and reduce the power consumption. Damage to the load due to unstable power quality.

Claims

The transient power compensator is characterized in that the transient power compensator comprises a main compensation circuit connected by a power unit and an isolated charging unit, and both ends of the main compensation circuit are used for paralleling energy units, The power unit is configured to supply power to the power type power unit, and the isolated charging unit is configured to charge the power unit when the power unit power is lower than the set value or before the power type power unit is started, and disconnect the power unit at other times. The current path of the energy unit, which is a high rate discharge energy storage device.
The transient power power compensator according to claim 1, wherein the isolated charging unit comprises a charging circuit, and the charging circuit is an AC-DC-AC-DC switching circuit, an AC-DC switching circuit, DC-AC-DC switching circuit or DC-DC switching circuit.
The transient power power compensator according to claim 2, wherein said AC-DC-AC-DC switching circuit comprises an input rectification filter circuit, a high frequency transformer and an output rectification filter circuit, which are sequentially connected, The input end of the input rectification filter circuit is used for connecting an AC input, and is processed by the switch circuit to be converted into a DC power input adapted to the power unit to the power unit.
The transient power compensator according to claim 2, wherein said AC-DC switching circuit comprises a transformer, a rectifying filter circuit, and a voltage stabilizing and current limiting circuit connected in sequence, wherein the input end of the switching circuit is After the AC input is connected, the switch circuit is processed and converted into a DC power input adapted to the power unit to the power unit to charge the power unit.
The transient power compensator according to claim 2, wherein said DC-AC-DC switching circuit comprises a high frequency transformer and an output rectifying and filtering circuit which are sequentially connected, and one side of the high frequency transformer is used for connection. The DC input is processed by the switching circuit and converted into a DC input adapted to the power unit to the power unit to charge the power unit.
The transient power compensator according to claim 2, wherein said DC-DC switching circuit comprises a voltage conversion circuit and a voltage limiting and current limiting circuit connected in sequence, and the input terminal of the voltage conversion circuit is used for connecting DC Input, converted by the switching circuit into a DC input adapted to the power unit To the power unit, charge the power unit.
The transient power power compensator of claim 1 wherein said power unit is a supercapacitor cell, a module consisting of a series or parallel connection of supercapacitor cells, or a capacitor array.
A combined super battery, characterized in that the combined super battery comprises a transient power compensator and an energy unit connected to the transient power compensator, the transient power compensator comprising the power unit and the isolation The charging unit is connected to form a main compensation circuit, and the two ends of the main compensation circuit are connected to the energy unit, wherein the power unit is used for powering the power type power unit, and the isolated charging unit is used for lowering the power unit in the power unit. The power unit is charged before the start of the power or power type unit, and the current path of the power unit and the energy unit is disconnected at other times. The power unit is a high-rate discharge energy storage device, and the energy unit is stored. Energy device.
The combined super battery according to claim 8, wherein said isolated charging unit comprises a charging circuit, said charging circuit being an AC-DC-AC-DC switching circuit, an AC-DC switching circuit, and a DC- AC-DC switching circuit or DC-DC switching circuit.
The combined super battery according to claim 9, wherein said AC-DC-AC-DC switching circuit comprises an input rectification filter circuit, a high frequency transformer and an output rectification filter circuit, which are sequentially connected, said input rectification The input end of the filter circuit is used for connecting an AC input, and is processed by the switch circuit to be converted into a DC input adapted to the power unit to the power unit.
The combined super battery according to claim 9, wherein said AC-DC switching circuit comprises a transformer, a rectifying filter circuit and a voltage stabilizing and current limiting circuit connected in sequence, and an input end of the switching circuit is used for connecting The AC input is processed by the switching circuit and converted into a DC input adapted to the power unit to the power unit to charge the power unit.
The combined super battery according to claim 9, wherein said DC-AC-DC switching circuit comprises a high frequency transformer and an output rectifying and filtering circuit which are sequentially connected, and one side of the high frequency transformer is used. After the DC input is connected, it is processed by the switch circuit and converted into a DC power input adapted to the power unit to the power unit to charge the power unit.
The combined super battery according to claim 9, wherein the DC-DC switching circuit comprises a voltage conversion circuit and a voltage limiting and current limiting circuit connected in sequence, and the input end of the voltage conversion circuit is used for connecting the DC input. After being processed by the switching circuit, it is converted into a DC power input adapted to the power unit to the power unit to charge the power unit.
The combined super battery according to claim 8, wherein the power unit is a super capacitor unit, a module or a capacitor array composed of a series and a parallel connection of super capacitors; and the energy unit is a lead acid battery. , Ni-MH battery, lithium manganese oxide battery, lithium iron phosphate battery, ternary battery or lithium titanate battery.
An electric system compensation power supply method, characterized in that the method distinguishes the electric equipment according to the power characteristics, and is divided into a power type electric unit and a non-power type electric unit, and the power type electric unit is powered by the power unit, The power type power unit is powered by the energy unit, and the power unit and the energy unit are electrically isolated by the isolated charging unit. When the power unit power is lower than the set value or the power type power unit is started, the power unit is in the isolated charging unit. Under the control, the energy unit or the external power source is charged, and at other times, the current path of the power unit and the energy unit is disconnected, and the power unit is a high-rate discharge energy storage device.
The electrical system compensation power supply method according to claim 15, wherein the electrical system for the compensation power supply method comprises a starter motor, and the starter motor is connected to the transient power power compensator through a contact of the electromagnetic switch, The power unit in the transient power power compensator supplies power, and the coil of the electromagnetic switch and the start relay coil are connected to the transient power power compensator or the energy unit, and are powered by the energy unit or the power unit.
The electrical system compensation power supply method according to claim 15, wherein the isolated charging unit is provided with an anti-backup function, and the power unit is prohibited from being discharged to the energy unit.
The electrical system compensation power supply method according to any one of claims 15-17, wherein the isolated charging unit comprises a charging circuit, and the charging circuit is an AC-DC-AC-DC switching circuit, AC - DC switching circuit, DC-AC-DC switching circuit or DC-DC switching circuit.