CN205901410U - Modular emergent guarantee power - Google Patents

Abstract

The utility model relates to a combined emergency guarantee power supply. The utility model adopts a combined super battery as an energy storage device of the emergency guarantee power supply, including an energy unit and a power unit. The output end of the energy unit is used to supply power to connect the non-power type electric unit. An isolated charging unit is connected between the output end of the energy unit and the power unit. When the power unit supplies power to the power type electric unit, disconnect the connection between the power unit and the energy unit. In the current path, only the power unit supplies power to the power unit, and when the power unit’s power is lower than the set value and the power unit is not working, the isolated charging unit charges the power unit through the energy unit or external power supply. The utility model solves the problems that the current emergency protection power supply adopts the energy unit to supply power to the power consumption unit, which has a large impact on the current of the energy unit, which causes the life of the energy unit to be reduced, and the power supply of other power consumption units is unstable.

Description

Combined emergency protection power supply

technical field

The utility model relates to a combined emergency protection power supply, which belongs to the technical field of circuit system application.

Background technique

Various emergency power supplies have become important emergency power guarantee devices for people's daily transportation, tourism and field production operations, such as emergency power supplies for various vehicles equipped with internal combustion engines and production equipment. The electrical system commonly used in emergency protection power supply is shown in Figure 1, which is mainly composed of energy storage devices, charging circuits, control circuits, etc. The emergency support power supply is carried on the vehicle (machine) as an emergency power supply equipment. It is used when the internal combustion engine is difficult to start or when emergency power supply is required when there is no normal power supply in the field; when the vehicle is running, the emergency support power supply is charged by the on-board generator, or Charge it in a place with mains power supply for subsequent emergency use.

At present, most of the energy storage devices for emergency protection power supply use battery packs or supercapacitor modules, which are responsible for providing electric energy for power consumption units. This single electric energy supply device has exposed many problems in operation practice. The different electrical characteristics of power consumption units and non-power consumption units have very different performance requirements for energy storage devices: power consumption units require excellent discharge rate performance of energy storage devices, while non-power consumption units require Energy storage devices only need a certain capacity, and the rate performance is not high. This situation leads to the fact that if the energy storage device uses a battery, in order to meet the transient high power required by the power consumption unit, it has to be "over-allocated", which makes the battery occupy a large space, resulting in a waste of resources and is not economical; If the energy storage device uses a supercapacitor, although it can meet the instantaneous high power requirements of the power consumption unit, due to the low energy density of the supercapacitor, it "carries less energy", has a small number of uses, and has a single purpose, which cannot meet various "emergency" applications in the field. "Requirements, such as detection, lighting, communication, or audio equipment, etc.

Utility model content

The purpose of this utility model is to provide a combined emergency protection power supply to solve the problem of "over-configuration" of the energy unit caused by the current use of the energy unit as the power supply for the power-consuming unit, which has a large impact on the current of the energy unit and causes the life of the energy unit to be reduced. Unstable power supply of other power consumption units.

The utility model provides a combined emergency protection power supply for solving the above technical problems, including a battery charging circuit and an energy storage device. The energy storage device is a combined super battery, including an energy unit and a power unit, and the output terminal of the power unit It is equipped with a power output interface for power supply and connection to a power-consuming unit. The output end of the energy unit is provided with an energy output interface for supplying power and connecting to a non-power-consuming unit. There is an isolated charging connection between the output terminals of the energy unit and the power unit. unit, the isolated charging unit is used to disconnect the electrical connection between the power unit and the energy unit when the power unit supplies power to the power-type power unit, and when the power unit’s power is lower than the set value and the power-type power unit does not work When the power unit is charged by the isolated charging unit through the energy unit or an external power supply, the battery charging circuit is connected to the energy unit for charging the energy unit, the energy unit is an energy storage device, and the power unit is a high-power Discharged energy storage devices.

The isolated charging unit includes a power unit charging circuit, and both the battery charging circuit and the power unit charging circuit can use AC-DC-AC-DC switching circuits, AC-DC switching circuits, DC-AC-DC switching circuits or DC-DC switching circuit.

The AC-DC-AC-DC switching circuit includes an input rectifying and filtering circuit, a high-frequency transformer and an output rectifying and filtering circuit connected in sequence. After that, it is converted into a direct current suitable for the power unit or energy unit and input to the power unit or energy unit.

The AC-DC switching circuit includes a transformer connected in sequence, a rectification filter circuit, a voltage stabilizing and a current limiting circuit, the input end of the switching circuit is used to connect to an AC input, and after being processed by the switching circuit, it is converted into a power unit or energy The DC power matched with the unit is input to the power unit or energy unit to charge the power unit or energy unit.

The DC-AC-DC switching circuit includes a high-frequency transformer and an output rectification filter circuit connected in sequence, one side of the high-frequency transformer is used to connect the DC input, and after being processed by the switching circuit, it is converted into a power unit or an energy unit. The adapted direct current is input to the power unit or the energy unit to charge the power unit or the energy unit.

The DC-DC switching circuit includes a voltage conversion circuit and a voltage stabilizing and current limiting circuit connected in sequence, and the input terminal of the voltage conversion circuit is used to connect a DC input, and after being processed by the switching circuit, it is converted into a power unit or an energy unit suitable for The distributed direct current is input to the power unit or energy unit to charge the power unit or energy unit.

The power unit is a single supercapacitor, a module composed of supercapacitor monomers connected in series and parallel, or a capacitor array.

The beneficial effect of the utility model is: the utility model adopts the combined super battery as the energy storage device of the emergency guarantee power supply, including the energy unit and the power unit, and the output end of the power unit is provided with a power output interface, which is used to supply power and connect the power type electricity The output end of the energy unit is provided with an energy output interface, which is used to supply power and connect to a non-power type power unit. An isolated charging unit is connected between the output end of the energy unit and the power unit. When the power unit supplies power, disconnect the electrical connection between the power unit and the energy unit, and when the power unit’s power is lower than the set value and the power-type power unit is not working, the isolated charging unit will charge the power unit through the energy unit or external power supply . The utility model only uses the power unit in the combined super battery to supply power to the power-type power-consuming unit, preventing the power-type power-consuming unit from being unable to work due to excessive discharge of the battery, affecting the normal operation of the power-type power-consuming unit, and the energy unit is no longer Undertaking the task of transient high-power operation, there will be no instantaneous large voltage drop, which ensures the stable operation of the non-power type power consumption unit and reduces the damage caused by the unstable power quality of the power load.

At the same time, the energy unit no longer undertakes the task of transient high-power operation, and is only responsible for the continuous energy supply of small-power loads, which is not damaged by high-current shocks, and has a longer life, avoiding the energy unit being "prematurely" judged as waste, and causing waste. The selection and configuration can be "slimmed down" to achieve miniaturization and light weight.

Description of drawings

Figure 1 is a structural block diagram of a traditional emergency support power supply;

Fig. 2-a is a structural block diagram of the combined emergency protection power supply of the utility model;

Fig. 2-b is a structural block diagram of the utility model combined emergency protection power supply;

Fig. 3-a is the structural representation of adopting AC-DC-AC-DC switching circuit in the utility model embodiment;

Fig. 3-b is a schematic structural diagram of an AC-DC switch circuit used in an embodiment of the present invention;

Figure 4-a is a schematic structural diagram of a DC-AC-DC switch circuit used in an embodiment of the present invention;

Fig. 4-b is a schematic structural diagram of a DC-DC switch circuit used in an embodiment of the utility model.

detailed description

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described further.

An embodiment of a combined emergency protection power supply of the present utility model

In the power consumption unit, the power consumption unit and the non-power consumption unit are relative concepts. The power consumption unit has a short continuous power consumption time (less than 10 seconds), high power (the rated current is generally in the dozens Amperes or more), such as starting the motor, etc.; non-power type power consumption units have the power consumption characteristics of long or short continuous power consumption and low power (rated current is generally below tens of amperes), such as detection, lighting , communication or audio equipment, etc.

In the following, a specific combined emergency support power supply applied to starting an internal combustion engine is taken as an example for illustration. The combined emergency protection power supply in this embodiment, as shown in Figures 2-a and 2-b, includes a battery charging circuit 4 and a combined super battery, and the combined super battery includes a power unit 1, an isolated charging unit 3 and an energy unit 2. The isolated charging unit 3 is connected between the output end of the energy unit 2 and the power unit 1, and the output end of the power unit 1 is provided with a power output interface 5 for supplying power and connecting to a non-power type electric unit; There is an energy output interface 6 for supplying power and connecting to a non-power consumption unit, and the battery charging circuit 4 is connected to the output end of the energy unit for charging the energy unit 2 . The isolated charging unit 3 is used to disconnect the electrical connection between the power unit 1 and the energy unit 2 when the power unit supplies power to the power-type power-consuming unit 1, and when the power of the power unit 1 is lower than the set value and the power-type power-consuming unit does not During operation, the power unit 2 is charged by the isolated charging unit 3 through the energy unit 2 or an external power supply.

When the power type electric unit is working, the current path between the power unit 1 and the energy unit 2 is disconnected through the isolated charging unit 3, and only the power unit 1 supplies power for the power type electric unit, and the non-power type electric unit is powered by the energy Unit 5 supplies power; when the power type power consumption unit 1 is not working, the energy unit 2 provides electric energy for other power consumption devices, and at the same time isolates the charging unit 3 to judge whether the power of the power unit 1 is sufficient. If not, the power unit 1 and the energy The unit 2 is connected in parallel through the isolated charging unit 3, and the energy unit 2 or the external power supply charges the power unit 1 through the isolated charging unit 3, otherwise it is not connected in parallel. At the same time, the isolated charging unit 3 has an anti-reverse charging function, and the power unit 1 is prohibited from discharging to the energy unit 2 .

It can be seen that the energy unit 2 in the emergency protection power supply of the present utility model no longer undertakes the task of transient high-power operation, but is only responsible for the continuous energy supply of low-power loads. The power unit can output stably, and the energy unit is not damaged by the impact of high current, and has a longer life, so as to prevent the energy unit from being "prematurely" judged invalid and causing waste. The energy unit can be configured according to the energy requirements of other power-consuming devices, which appropriately reduces its volume and weight, and realizes "slimming" in the selection and configuration to save resources and reduce environmental pollution; only rely on the power unit as a power-type power unit Power supply, so that the power supply quality of the power-type power consumption unit is better, and prevent the situation that the power-type power consumption unit cannot work due to excessive discharge of the energy unit.

The power unit 1 can be a single supercapacitor, a module composed of supercapacitors connected in series and parallel, or a traditional capacitor array, as shown in Figure 2-a. The power unit can also use an energy storage device with excellent rate performance and low-temperature performance. As shown in Figure 2-b, the energy storage device can be a battery with high-rate discharge characteristics, such as a lithium-ion battery (lithium iron phosphate system, ternary system, Lithium manganate series, lithium titanate series, etc.) and winding high-rate lead-acid batteries, or low-temperature high-rate lithium batteries and low-temperature high-rate lead-acid batteries. The energy unit 2 can be a lead-acid battery, a nickel-metal hydride battery, or any one of lithium manganate battery, lithium iron phosphate battery, ternary battery, and lithium titanate battery.

The isolated charging unit 3 has the functions of isolation and charging, and can electrically isolate the power unit 4 and the energy unit 5, and can also charge the power unit 4. The isolated charging unit can be connected to an AC or DC power supply through the energy unit Charge the power unit. According to different charging input types, the charging circuit of the isolated charging unit and the battery charging circuit 4 can adopt AC-DC-AC-DC switching circuit, AC-DC switching circuit, DC-AC-DC switching circuit or DC-DC switching circuit .

When using AC input, such as the mains power grid, the isolated charging unit and battery charging circuit can use AC-DC-AC-DC switching circuit, the specific structure is shown in Figure 3-a, including sequentially connected input rectification filter circuit, high frequency Transformer and output rectification filter circuit, the switch circuit has a corresponding control circuit, and the AC input is connected to the power unit or energy unit through the switch circuit. The processing process is as follows: the AC input is rectified and filtered by the rectification filter circuit and converted to DC, then enters the high-frequency transformer for inversion and high-frequency conversion processing, the output frequency converted AC, and finally enters the output rectification filter circuit, by The output rectification and filtering circuit rectifies and filters the converted alternating current to obtain direct current suitable for the power unit or energy unit, and charges the power unit or energy unit. The charging process of the switching circuit is controlled by the control circuit through the driving circuit according to the signals collected from the switching circuit by the voltage loop and the current loop. At the same time, in order to protect the switch circuit, the isolated charging unit is also provided with a protection circuit.

When the isolated charging unit or the battery charging circuit adopts an AC-DC switching circuit, the specific circuit is shown in Figure 3-b. The switching circuit includes a transformer, a rectification and filtering circuit, and a voltage stabilizing and current limiting circuit connected in sequence. The switch circuit is connected to a power unit or an energy unit. The processing process of the switching circuit is as follows: After the AC power is transformed by the transformer, it enters the rectification and filtering circuit to rectify and filter the transformed AC, and then inputs it to the power unit or energy unit through the voltage stabilizing and current limiting circuit to realize power regulation. Charging of cells or energy cells. The control of the switch circuit can be realized by setting a switch on the switch circuit, and at the same time, in order to realize the protection of the switch circuit, the isolated charging unit is also provided with a protection circuit.

When the isolated charging unit or the battery charging circuit adopts a DC-AC-DC switching circuit, its specific circuit structure is shown in Figure 4-a, including a high-frequency transformer connected in sequence, an output rectification and filtering circuit, and a corresponding control circuit, DC The input is connected to the power unit or energy unit through the switch circuit. The processing process of the switching circuit is as follows: the high-frequency transformer inverts the DC input and converts the frequency, and inputs the converted AC power to the output rectification and filtering circuit, and rectifies and filters the frequency-converted AC through the output rectification and filtering circuit. Get the direct current suitable for the power unit or energy unit to charge the power unit or energy unit. The whole switching circuit is controlled by the control circuit, and the control circuit controls the switching circuit through the driving circuit according to the signal collected by the voltage loop and the current loop. At the same time, in order to protect the switch circuit, the isolated charging unit is also provided with a protection circuit.

When the isolated charging unit or the battery charging circuit adopts a DC-DC switching circuit, its specific circuit structure is shown in Figure 4-b, including a voltage conversion circuit, a voltage stabilizing circuit and a current limiting circuit connected in sequence, and the DC input is connected through the switching circuit. into the power unit or energy unit for charging. The processing process of the switching circuit is as follows: After the DC input is transformed by the voltage conversion circuit, it enters the voltage stabilizing and current limiting circuit, and the DC power that is compatible with the power unit or energy unit is obtained through the voltage stabilizing and current limiting circuit, and is input to the power unit Or the energy unit, so as to realize the charging of the power unit or the energy unit. The control of the switch circuit can be realized by setting a switch on the switch circuit, and at the same time, in order to realize the protection of the switch circuit, the isolated charging unit is also provided with a protection circuit.

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

In addition, as required, the combined super battery used in the utility model also includes a corresponding peripheral circuit, the peripheral circuit includes a detection circuit, a protection and equalization circuit, and a management and display module. The protection and balance circuit realizes the balance protection, charge protection, discharge protection, over-voltage protection, under-voltage protection, over-current protection, over-temperature protection and short-circuit protection functions of the power unit, and realizes the management and display of the power unit through the management and display module. The parameters are displayed. The detection circuit, protection and equalization circuit, and management and display module can be designed according to the required functions. The realization of each functional circuit is a conventional technical means for those skilled in the art, and no specific circuit description will be given here.

The emergency protection power supply of the utility model adopts a combined super battery as an energy storage device, and uses the power unit of the combined super battery to provide electric energy for a power-consuming unit, so that the energy unit no longer undertakes the task of transient high-power operation, and the energy unit only It is responsible for the continuous energy supply of low-power loads, avoiding the impact of high current on the energy unit, and effectively improving its service life. At the same time, the selection and configuration of the energy unit can be "slimmed down" to achieve miniaturization and light weight. In addition, the power unit is only used to supply the power load unit. The isolated charging unit has the function of anti-reverse charging, and the power unit cannot discharge to the energy unit at any time, which has a certain protective effect on the power unit. At the same time, relying on the emergency protection power supply of the utility model to supply power to the power type power consumption unit, the power supply quality of the power type power consumption unit is better, especially the low temperature performance is better, the energy unit will not have a large instantaneous voltage drop, and the power type power consumption unit is guaranteed The power consumption unit can work stably, and the damage caused by the unstable power quality of the non-power consumption unit is reduced.

The utility model divides the electrical equipment into a power type electrical unit and a non-power type electrical unit, the power type electrical unit is only powered by the power unit, and the non-power type electrical unit is powered by the energy unit to reach the energy supply side and The matching and balance of the energy demand side optimizes the emergency power supply, prolongs life, improves performance, reduces resource waste and system maintenance workload, and realizes effective energy saving through the adoption of lightweight and higher-efficiency power units.

Claims (7)

1. a kind of combined emergency ensures power supply, including battery charger and energy storage device it is characterised in that described energy storage Device is combined type superbattery, and including energy unit and power cell, power cell output end is provided with power output interface, For for electrical connection power-type power unit, energy unit output end is provided with energy output interface, for for electrical connection NOT function Rate type power unit, is connected with isolation charhing unit, described isolation charhing unit between energy unit and power cell output end For when power cell is powered to power-type power unit, disconnecting the electrical connection of power cell and energy unit, and in work( When rate unit electricity is less than setting value and power-type power unit and does not work, energy unit or outer is passed through by isolation charhing unit Connect power supply to charge for power cell, battery charger is connected with energy unit, for charging for energy unit, described energy Unit is energy storage device, and described power cell is the energy storage device of high-multiplying power discharge.

2. combined emergency according to claim 1 ensures power supply it is characterised in that described isolation charhing unit includes Power cell charging circuit, described battery charger and power cell charging circuit all can be using ac-dc-ac-dc switches Circuit, ac-dc on-off circuit, dc-ac-dc on-off circuit or dc-dc on-off circuit.

3. combined emergency according to claim 2 ensures power supply it is characterised in that described ac-dc-ac-dc switchs Circuit includes input rectifying filter circuit, high frequency transformer and the output rectifier and filter being sequentially connected, described input rectifying The input of filter circuit is used for connecting exchange input, is converted to and power cell or energy unit after processing through this on-off circuit The DC supply input being adapted is to power cell or energy unit.

4. combined emergency according to claim 2 ensures power supply it is characterised in that described ac-dc on-off circuit bag Include the transformer being sequentially connected, current rectifying and wave filtering circuit and voltage stabilizing and current-limiting circuit, the input of this on-off circuit is used for connecting to be handed over Stream input, is converted to the DC supply input being adapted with power cell or energy unit to power list after processing through this on-off circuit Unit or energy unit, are power cell or energy unit charges.

5. combined emergency according to claim 2 ensures power supply it is characterised in that described dc-ac-dc on-off circuit Including the high frequency transformer being sequentially connected and output rectifier and filter, the side of high frequency transformer is used for connecting direct current input, The DC supply input being adapted with power cell or energy unit is converted to power cell or energy after processing through this on-off circuit Amount unit, is power cell or energy unit charges.

6. combined emergency according to claim 2 ensures power supply it is characterised in that described dc-dc on-off circuit bag Include the voltage conversion circuit being sequentially connected and voltage stabilizing and current-limiting circuit, voltage conversion circuit input is used for connecting direct current input, The DC supply input being adapted with power cell or energy unit is converted to power cell or energy after processing through this on-off circuit Amount unit, is power cell or energy unit charges.

7. combined emergency according to claim 1 ensures power supply it is characterised in that described power cell is super electricity Container monomer, the module by ultracapacitor monomer connection in series-parallel composition or array of capacitors.