WO2018000130A1

WO2018000130A1 - Engine standby power supply apparatus

Info

Publication number: WO2018000130A1
Application number: PCT/CN2016/087273
Authority: WO
Inventors: 张磊
Original assignee: 张磊
Priority date: 2016-06-27
Filing date: 2016-06-27
Publication date: 2018-01-04

Abstract

An engine standby power supply apparatus, comprising an energy storage unit (1) used for storing and releasing energy, where the energy storage unit (1) is a supercapacitor; a controller (3), the controller (3) being connected to the energy storage unit (1) and used for detecting the level of the energy storage unit (1); a switch circuit connected to the energy storage unit (1), the energy storage unit (1) being connected to a rechargeable battery via the switch circuit, the controller (3) being connected to the switch circuit and used for controlling the opening and closing of the switch circuit; and an interface part (2) used for connecting to an external power supply, the interface part (2) being electrically connected to the energy storage unit (1). The interface part (2) charges the energy storage unit (1) via the external power supply. When the energy storage unit (1) is charged, the controller (3) issues a charging completed signal upon detecting that the level of the energy storage unit (1) reached a preset value; when the engine is started, the controller (3) issues a signal to close the switch circuit upon detecting a voltage drop in the rechargeable battery of the engine, thus releasing energy from the energy storage unit (1) to the engine.

Description

Engine backup power supply device

Technical field

The present invention relates to an engine backup power solution, and more particularly to a backup power solution that does not require a self-contained power source.

Background technique

The starting system is used to start the engine, including a gasoline engine, a diesel engine, etc., to bring the stationary engine into operation. At present, almost all automobile engines and some small agricultural machinery engines use an electric starting system, and the battery is one of the key components.

The start of the engine requires the battery to provide a large starting current, usually at 200-800Amp However, the performance of the battery becomes poor at high rate discharge and low temperature discharge, and it may occur because the engine cannot be supplied with a sufficiently large starting current. In addition, due to the deterioration of the battery performance, a sharp change in its output voltage during the startup process may also cause the startup system to be powered down, whereby the engine cannot be started normally.

In this case, you need to use the backup power to start the device, and the commonly used backup power device. It usually has a built-in battery such as a lead-acid battery or a lithium battery. In use, by connecting its two outputs to the two outputs of the battery of the starting system, the backup power source is used instead of the battery output starting current to start the engine. However, the existing emergency starting devices are often bulky and cumbersome, and the battery therein is the same as the battery of the car, and the service life is only In 2-3 years, the car cannot be started effectively at low temperatures and power failures, and regular maintenance is required to be used effectively.

Therefore, it is necessary to design a more convenient backup power solution.

Summary of the invention

The technical problem to be solved by the present invention is to provide an engine A backup power supply unit that does not require a self-contained battery component, but can use an external power supply assembly to start the engine in an emergency.

An engine backup power supply device according to the present invention includes an energy storage unit for storing and releasing energy, wherein the energy storage unit is a super capacitor; and a controller, the controller is connected to the energy storage unit a switch circuit for detecting an energy storage unit; a switch circuit connected to the energy storage unit, the energy storage unit is connected to a battery through the switch circuit, the controller is connected to the switch circuit and used to control the switch circuit And an interface portion for accessing external power supply, the interface portion is electrically connected to the energy storage unit, and the interface portion charges the energy storage unit by external power supply, and after the energy storage unit is charged, When the controller detects that the amount of the energy storage unit reaches a preset value, a charging completion signal is given, after the engine is started, the controller detects a decrease in the engine battery voltage, and gives a signal to cause the switch circuit Closing, releasing the energy of the energy storage unit to the engine.

The external power supply connected to the interface unit is DC power supply.

Among them, the device providing DC power supply is specifically a battery pack, or an AC/DC adapter, or a hand crank generator, or a solar panel.

The engine backup power supply device of the present invention further includes an externally disposed housing, the housing is provided with a slot, the slot has a metal piece, and the slot is adapted to an external power supply device, The metal piece is connected to the contact point of the external power supply device.

The interface part is directly connected to the energy storage unit and the external power supply device.

Wherein, the controller further comprises display means for displaying the detected amount of the energy storage unit.

Wherein, the display device is a plurality of display lights, and the level of the charge amount of the energy storage unit is displayed by the number of lights.

The controller is connected to a side port of the switch circuit connected to the battery for detecting the voltage of the battery.

The engine backup power supply device of the present invention further includes an adjustment circuit connected to the interface portion for adjusting an externally supplied voltage, wherein the adjustment circuit is connected in series with the interface portion, and then connected in parallel with the interface portion to the Both ends of the energy storage unit.

Wherein, the energy storage unit is a series and/or parallel combination of super capacitors.

DRAWINGS

Figure 1 is a schematic illustration of a particular embodiment of the invention.

2 is an external view of a specific embodiment of the present invention.

Figure 3 is a circuit diagram of the controller of the present invention.

detailed description

The invention provides an engine The backup power supply device, when the engine is self-equipped battery, usually a battery, fails, the standby power supply device of the present invention can achieve the function of emergency starting the engine by connecting a common external power source instead of the battery.

Engine of the present invention The backup power supply device includes an energy storage unit 1 for storing and releasing energy, and an interface unit 2 for accessing external power supply, the interface portion is electrically connected to the energy storage unit, and the interface portion 2 The energy storage unit 1 is charged by external power supply. Thus, when the battery fails, the interface unit 2 is connected to the external power supply, and the energy storage unit 1 is charged. After the energy storage unit is charged, the vehicle starter, or the engine, can be accessed and activated. Specifically, the engine can be started by connecting a battery to an engine, such as a battery, and connecting the engine through a battery. The interface unit 2 of the present invention can directly connect the energy storage unit 1 and an external power supply device. No internal power supply is required.

Specifically, the interface portion 2 has a first input end and a second input end for connecting two ends of the external power supply, such as the two ends of the battery pack, that is, the positive and negative poles, thereby being an engine. The energy storage unit 1 of the backup power supply device is charged. Engine of the present invention The backup power supply device further includes a first output end and a second output end. The first output end and the second output end are respectively connected to the two ends of the energy storage unit 1 and externally connected to the battery, such as the two ends of the battery.

Engine of the present invention The backup power supply device further includes a controller 3 for detecting the energy storage unit, and the controller 3 is connected to the energy storage unit for detecting the amount of the energy storage unit and comparing it with a preset value. When the external power supply charges the energy storage unit to a preset value, it can replace the original power supply and start the engine. The controller 3 of the present invention further includes a display device 31 for displaying the amount of the detected energy storage unit. Specifically, the capacitor charging state indication L1 in the figure is shown. The display device can be a display light. When the amount of the energy storage unit reaches a predetermined value, the indicator lights up. Or the display device is a plurality of display lights, and the level of the charge amount of the energy storage unit can be displayed by the number of lights. The display device can also be a display screen, can display graphic characters, etc., and can directly display the amount or magnitude of the energy storage unit.

An engine of the invention The backup power supply device further includes a switch circuit connected to the energy storage unit 1, specifically a relay K1. The energy storage unit is connected to the battery through the switch circuit. The switching circuit can be connected to the engine The first output or the second output of the backup power supply. The controller 3 is connected to the switch circuit for controlling the switch of the switch circuit, and is connected to a side port of the switch circuit connected to the battery for detecting the voltage of the battery. When the engine ignition switch K0 is closed, the battery discharges a large current, so that the battery, such as the battery terminal voltage, drops rapidly. If the terminal voltage drop speed is greater than 1V/S, the controller 3 gives a signal to close the switch circuit. If the relay K1 is closed, the energy stored in the energy storage unit is output to the vehicle starter, and the engine can be started. The circuit diagram of the controller is shown in Figure 3. Through the controller circuit, the functions of the above controller can be achieved.

The controller circuit includes a single chip U3, a chip VR1, a chip U2, and a plurality of resistors R13, R14 and R22, capacitors C8, C9, C10, C15, C16 and C20, diodes D5, D6 and D7 and inductor L3. Among them, the model number of the single chip U3 is MA86E/L508, the model of the chip VR1 is 78L 05, and the model of the chip U2 is AX5201. The connection relationship between these components is as shown. The two input terminals of the controller respectively receive the first electrical signal and the second electrical signal, namely voltage V1 and voltage V2; the three output terminals are three output ports of the single chip U3 K1_CON, K2_CON and K3_CON are used to output control signals S1, S2 and other signals, respectively.

The control signal S1 is used to control the on and off of relay K1. Specifically, the first relay K1 is a normally open type relay, when receiving the control signal S1 , it is closed; when the control signal S1 is removed, it is turned on. The control signal S2 from the controller is used to control the on and off of the adjustment circuit.

The energy storage unit 1 can store and release energy so that the backup power supply device of the present invention can be used in place of the original power supply. The energy storage unit can use a supercapacitor, or a supercapacitor group, which can be a string and/or a parallel combination of a single supercapacitor, or other energy storage component capable of storing and releasing energy. The two ends of the energy storage unit 1 can respectively be connected to a battery, such as an original battery of the engine, so that the energy storage unit 1 can replace the battery and start the engine.

The interface unit 2 can be connected to an external power supply device, and can be an external power supply. The external power supply can be an external DC power supply, wherein the external DC power supply can be an AC/DC adapter, which can be a hand-cranked generator, and can be a solar panel or the like that can generate DC power. s installation. In this embodiment, it is an external battery B1 as shown in the drawing. The interface unit 2 is connected in parallel with the energy storage unit 1 so that external power supply can charge the energy storage unit.

An engine backup power supply device of the present invention further includes an interface unit 2 Connected adjustment circuit to adjust the voltage of the external power supply, wherein the adjustment circuit is connected in series with the interface part 2, connected in series and then connected in parallel to the energy storage unit 1 The two ends of the voltage are adjusted to the voltage required to charge the energy storage unit. The adjustment circuit can be a DC-DC conversion circuit, as shown in the figure DC-DC Charge management circuit. The external power supply can be a DC input source, and the voltage can be higher or lower than the preset voltage of the energy storage unit, and can be adjusted by the DC-DC conversion circuit to make it the voltage required for the energy storage unit.

In the specific embodiment, the specific working process of the present invention Yes, there is a DC power input to the interface section, and the super capacitor is charged by the DC-DC voltage conversion circuit. When the super capacitor voltage reaches a predetermined value, the controller gives a signal indicating that the ignition can be started. When the ignition switch K0 of the automobile engine is closed, the voltage of the battery terminal is lowered. When the controller detects this voltage drop, or the controller detects the ignition signal input of the automobile engine, the command signal S1 is issued to make the relay K1 be closed, and the energy stored in the super capacitor is stored. Output to the vehicle engine and start the engine.

In an embodiment, the external power supply device may be a battery pack, specifically a battery pack of a commonly used rechargeable power tool. An engine provided by the present invention The backup power supply device further includes a housing 4 having a slot 41 for connecting an external power supply device, such as a battery pack, the slot being adapted to the battery pack, and the battery pack being mountable in the slot. There is a contact piece 42 on the socket, which is made of metal and can be connected to the electrical contact point on the battery pack, so that the electricity on the battery pack can charge the super capacitor on the engine backup power supply device. The advantage of this product is that the plug-in power tool is very common, and the battery pack of the power tool can be used as an emergency power source for the vehicle in combination with an engine backup power supply device provided by the present invention.

Common power tool battery packs are available in voltages from 9.6V to 20V and capacities from 2Ah to 4Ah. With a minimum of 9.6V For example, the battery pack of 2Ah has an energy of 9.6V * 2A * 3600 = 69.12KJ (kJ). The start of a typical car requires 12V 300A for 1 second. The required energy is: 12V * 300A * 1S = 3.6KJ. So the energy of a lithium battery pack is enough to start a regular car many times. In a specific embodiment of the invention, for a 12V vehicle, the capacitor needs to be charged to 15V. If the voltage of the lithium battery pack is higher than 15V, it needs to be stepped down by the DC-DC converter circuit. If the voltage of the lithium battery pack is higher than 15V, it needs to be boosted by the DC-DC converter circuit.

The above has described in detail the preferred embodiments of the invention. It will be appreciated that many modifications and variations can be made in the present invention without departing from the scope of the invention. Therefore, any technical solution that can be obtained by a person skilled in the art based on the prior art based on the prior art by logic analysis, reasoning or limited experimentation should be within the scope of protection determined by the claims.

Claims

An engine backup power supply device, comprising: an energy storage unit for storing and releasing energy, wherein the energy storage unit is a super capacitor; and a controller, the controller is connected to the energy storage unit for detecting An amount of the energy storage unit; a switching circuit connected to the energy storage unit, the energy storage unit is connected to the battery through the switch circuit, the controller is connected to the switch circuit and used to control the closing of the switch circuit; An interface portion for accessing an external power supply, the interface portion being electrically connected to the energy storage unit, the interface portion charging the energy storage unit by external power supply, and after the energy storage unit is charged, when the control When the amount of the energy storage unit is detected to reach a preset value, a charging completion signal is given. After starting the engine, the controller detects a decrease in the engine battery voltage, and gives a signal to close the switch circuit. The energy of the energy storage unit is released to the engine.
The engine backup power supply device according to claim 1, wherein the external power supply connected to the interface portion is DC power supply.
The engine backup power supply device according to claim 2, wherein the device for supplying DC power is specifically a battery pack, or an AC/DC adapter, or a hand crank generator, or a solar panel.
The engine backup power supply device according to claim 3, further comprising an outer casing, wherein the casing is provided with a slot, the slot has a metal piece, and the slot is The external power supply device is adapted, and the metal piece is connected to a contact point of the external power supply device.
The engine backup power supply device according to claim 3, wherein the interface portion is directly connected to the energy storage unit and the external power supply device.
The engine backup power supply apparatus according to claim 5, wherein the controller further comprises display means for displaying the detected amount of the energy storage unit.
The engine backup power supply device according to claim 6, wherein the display device is a plurality of display lamps, and the level of the charge amount of the energy storage unit is displayed by the number of lights.
The engine backup power supply device according to claim 1, wherein the controller is connected to a side port of the switch circuit connected to the battery for detecting a voltage of the battery.
An engine backup power supply device according to claim 1, further comprising an adjustment circuit connected to the interface portion for adjusting an externally supplied voltage, wherein said adjustment circuit is connected in series with said interface portion, and then connected in series Parallel to both ends of the energy storage unit together with the interface portion.
The engine backup power supply apparatus according to claim 1, wherein the energy storage unit is a series and/or a parallel combination of super capacitors.