Emergency generator

Abstract

Void

Description

[0001] Emergency power supply technology

[0002] This invention belongs to the field of DC power supplies, specifically relating to an emergency power supply that can provide power to a variety of devices.

[0003] Background Technology

[0004] With the rapid development of technology and the continuous improvement of people's living standards, cars, mobile phones, computers, digital cameras, and other electronic devices have become essential items for people's daily lives, travel, and leisure activities. These devices are all battery-powered, and once the power source is lost, they completely lose their functionality, causing considerable inconvenience. Therefore, manufacturers provide corresponding chargers for each product, capable of converting 220V AC mains power into DC power of the appropriate voltage for charging. However, these chargers cannot meet the needs of outdoor charging. Especially for cars, starting problems are common, particularly on long journeys, where insufficient battery power or low battery temperature makes starting difficult, causing significant inconvenience to users.

[0005] Existing Chinese patent document CN 101685974 A discloses a portable power supply, including a battery pack, a charging circuit, an MCU microcontroller circuit, and a DC-DC voltage regulating output circuit. The charging circuit has an input terminal that can be connected to an external power source, and an output terminal that is electrically connected to the battery pack. The battery pack is simultaneously electrically connected to both the MCU microcontroller circuit and the DC-DC voltage regulating output circuit. The MCU microcontroller circuit is electrically connected to and controls both the charging circuit and the DC-DC voltage regulating output circuit. The advantages of this technical solution are: simple circuitry, small size, lightweight and portable, easy to operate, intelligent, low power loss, and multifunctional. It can be charged using mains power and can also power or charge various electronic products by changing different output adapters, making it convenient to manage, carry, and use. This patent application solves the problem of outputting multiple voltage levels and has a self-charging function, but it lacks high current output capability and cannot be used as a car starter. Furthermore, the current output in this application is all DC, while in reality, many external devices require DC power. Since it requires AC power, this patent application also cannot solve the problem of temporary power supply for such devices.

[0006] Summary of the Invention

[0007] The purpose of this invention is to provide an emergency power supply that is easy to charge itself, can output a large current for car starting, and can accurately control the output of the large current.

[0008] To achieve this objective, the present invention adopts the following technical solution:

[0009] An emergency power supply includes a housing, inside which a battery pack for storing electrical energy is disposed. The input terminal of the battery pack is connected to a charging circuit for charging the battery pack and the output terminal of a solar panel input circuit. The output terminal of the battery pack is connected to a high-current output circuit for outputting a large current when the car starts. An external battery intelligent detection system is connected between the battery pack and the high-current output circuit.

[0010] The battery pack is composed of lithium-ion cells connected in series or parallel, with lithium iron phosphate, lithium cobalt oxide, nickel-cobalt-manganese ternary lithium or lithium manganese oxide as positive electrodes and artificial or natural graphite as negative electrodes. Its output terminal is also connected to multiple DC-DC voltage regulation circuits and LED driver circuits. Each DC-DC voltage regulation circuit is connected to an MCU control circuit. The MCU control circuit is also connected to an intelligent LED power display system for displaying the power of the emergency power supply. The output terminal of the LED driver circuit is connected to an LED lighting lamp. The two ends of the battery pack are connected in parallel to a balancing protection circuit for protecting the battery pack.

[0011] The external battery intelligent detection system includes red and black battery clips for connecting the external battery, a relay for controlling the circuit to turn on or off based on the detection signal, a voltage recognition system for identifying the voltage of the external lead-acid battery or lithium-ion starting battery, and a current recognition system for identifying the current passing through the external starting circuit. The two ends of the relay coil are connected to the voltage recognition system, the input end of the relay is connected to the voltage recognition system, and the output end of the relay is connected to the high-current output circuit. The red and black battery clips are connected via a pluggable reverse connection plug or via wires connected to the positive and negative terminals of the battery pack. The pluggable reverse connection plug is connected to the positive and negative terminals of the battery pack. The voltage recognition system... The relay is a 12V or 24V relay with a current rating of 20A to 300A and 4 to 6 pins, connected to the red and black battery clamps. The external battery intelligent detection system is located outside the emergency power supply and is connected to the emergency power supply via a pluggable reverse connection protection plug, or it can be located inside the emergency power supply with the red and black battery clamps located outside the emergency power supply.

[0012] When the red and black battery clamps are connected to the positive and negative terminals of the external battery, if they are connected correctly, the feedback voltage displayed by the voltage recognition system is positive; otherwise, the feedback voltage is negative. The positive feedback voltage is in the range of a to b, where a is 6 to 24V and b is 9 to 30V, with a being less than b. When the feedback voltage is between a and b and is positive, the relay coil receives an electrical signal, the contacts close, and the output terminal is connected to the input terminal of the high-current output circuit. The emergency power supply begins to supply high-current power to the external device. At this time, the current recognition system detects the current passing through the high-current output circuit. If the current is less than c (0.1 to 10A), the electrical signal at both ends of the relay coil disappears, the contacts open, the output terminal disconnects from the high-current output circuit, and the high-current discharge to the external device stops. The output voltage of the high-current output circuit is DC12V or DC24V, and the instantaneous current is 100A to 600A.

[0013] The DC-DC voltage regulation circuit includes a DC-DC 19V boost output circuit with an output voltage of 19V, a DC-DC 12V output circuit with an output voltage of 12V, and a DC-DC 5V buck output circuit with an output voltage of 5V.

[0014] The DC-DC12V output circuit is connected to an alarm system for issuing alarm signals, an inverter circuit for converting the DC power output from the battery pack into AC power, and an intelligent heating system for heating the battery pack.

[0015] The inverter circuit outputs AC power at a voltage of 110V to 220V, and the inverter circuit is either built into the housing or connected externally to the housing.

[0016] The intelligent heating system includes a heating wire or heating element wrapped around the outside of the battery pack. A thermistor attached to the outer surface of the battery pack and connected to a heating wire or heating film, and a heating start switch for activating the intelligent heating system; the resistance value of the heating wire or heating film ranges from [value missing].

[0017] 0.1Ω-10Ω; The upper limit temperature of the battery pack surface is preset to t, where t ranges from 0 to 70°C. At this time, the heating start switch is turned on. If the surface temperature of the battery pack fed back to the MCU control circuit through the thermistor is less than t, the heating start switch is turned on, and current is conducted through both ends of the heating wire or heating film to start heating the battery pack. The heating time is preset to a fixed value d, where d ranges from 10 to 300 seconds. When the surface temperature of the battery pack reaches the upper limit temperature t, the heating start switch is automatically turned off, or when the heating time reaches d, the heating circuit of the intelligent heating system is automatically turned off.

[0018] The housing is made of plastic, aluminum alloy, or a combination of these materials. The solar panel input circuit is located on the outside of the housing. The power of the solar panel input circuit is 0.5W to 50W, and the input voltage is 5V to 25V.

[0019] The battery pack's output terminal is connected to the external battery intelligent detection system via a one-time or resettable fuse with a current rating of 50A to 500A.

[0020] The circuit of the current identification system includes: a high-precision operational amplifier U3 (model SGM8591), resistors R12, R13, R14, R15, R16, R17, R18, R20, R21, and RS; capacitors C9 and C12; a switching diode D4 (model IN4148); pin 1 of U3 is floating; pin 2 of U3 is connected to one end of R16, one end of R15, and one end of R21; pin 3 of U3 is connected to one end of C12, one end of RS, and the negative terminal of BT2; pin 4 of U3 is grounded together with the negative terminal of BT1 and the other end of RS; pin 5 of U3 is floating; pin 6 of U3 is connected to one end of R20, the other end of R21, and the positive terminal of D4; the other end of R20 is connected to the other end of C12; and pin 7 of U3 is connected to VCC and one end of C9. The other end of C9 is grounded, pin 8 of U3 is left floating, the negative terminal of D4 is connected to one end of R17, the other end of R17 is connected to one end of R18 and IN2, the other end of R18 is grounded, and the other end of R15 is connected to one end of R12, one end of R13, and one end of R14. Together.

[0021] The voltage identification system circuit includes: a dual operational amplifier U2 (LM358), a three-terminal voltage regulator U1 (7805), resistors R1, R2, R4, R5, R6, R7, R8, R9, R10, R11, capacitors C1, C2, C3, C4, C5, C6, C7, C8, Schottky diodes D1 and D2 (SS14), a three-terminal adjustable shunt reference source U4 (TL431), pin 1 of U2 connected to one end of R5, one end of C5, and one end of C4; the other end of R5 connected to one end of R6 and IN1; the other end of R6 grounded; pin 2 of U2 connected to pin 5 of U2, one end of R11, the cathode of U4, the reference of U4, and the other end of R16; the other end of R11 connected to VCC; pin 3 of U2 connected to the other end of C5... One end of R1, one end of R7, and one end of R8 are connected together. The other end of R1 is connected to the other end of C4. Pin 4 of U2 is grounded together with the other end of R7, the anode of U4, and one end of R9. The other end of R8 is connected together with the cathode of D2 and one end of R10. The anode of D2 is connected to the anode of BT2. Pin 6 of U2 is connected together with the other ends of R10, the other end of R9, one end of C6, and one end of R2. Pin 7 of U2 is connected together with the other ends of C6, one end of C7, and one end of R4. The other end of R4 is connected to point A. The other end of C7 is connected to the other end of R2. Pin 8 of U2 is connected together with one end of C8, one end of C2, one end of C3, pin 3 of U1, and VCC. The other end of C8 is grounded. The other ends of C2 and C3 are grounded together. Pin 1 of U1 is connected together with one end of C1 and the cathode of D1. Pin 2 of U1 is grounded together with the other end of C1. The positive terminal of D1 is connected to the positive terminal of BT1.

[0022] The relay circuit includes: a three-terminal voltage regulator chip U5 (model XC6219), resistors R3, R19, and R22, capacitors C11, C13, and C14, a Schottky diode D5 (model SS14), an MCU control chip J1, control switches Q1, Q2, and Q3 (model SI2300), and a relay. Pin 1 of U5 is connected to one end of C13, pin 3 of U5, and the VCC terminal. Pin 2 of U5 is grounded together with the other end of C13, one end of C14, and pin 2 of J1. Pin 4 of U5 is left floating. Pin 5 of U5 is connected to C14. The other end of J1 is connected to pin 1. Pin 3 of J1 is connected to IN1. Pin 4 of J1 is connected to OUT1. Pin 5 of J1 is connected to IN2. Pin 6 of J1 is connected to OUT2. Pin 7 and pin 8 of J1 are left floating. OUT1 is connected to one end of R3. The other end of R3 is connected to the gate of Q2. The drain of Q2 is connected to the source of Q3. The other end of R13 is connected to the drain of Q3. The other end of R12 is connected to the gate of Q3. The gate of Q3 is connected to point A. The source of Q2 is connected to the source of Q1. The other end of R14 is connected to the gate of Q1. The other end of R19 is connected to OUT2. The drain of Q1 is connected to the positive terminal of D5 and one end of the relay coil. The negative terminal of D5, the other end of the relay coil, one end of the normally open contact of the relay, and one end of R22 are connected to the positive terminal of BT1. The other end of R22 is connected to one end of C11, and the other end of C11 is connected to the other end of the normally open contact of the relay and the positive terminal of BT2.

[0023] The beneficial effects of this invention are as follows: The emergency power supply of this invention uses lithium-ion batteries as the battery pack, which is lightweight, small in size, durable, has a large instantaneous discharge current, and can be repeatedly charged. It can meet the high current requirements for starting a car. By connecting an external intelligent battery detection system between the high current output circuit and the battery pack, the high current power supply to external devices can be effectively controlled, accurately and reliably, and the power supply energy can be effectively utilized. The battery pack of this emergency power supply is also connected to a voltage regulating circuit that can output multiple voltage levels. By connecting the output terminals of each voltage regulating circuit to the MCU control circuit, it can meet the outdoor power supply needs of devices such as mobile phones, computers, digital cameras, car air pumps, car refrigerators, and car vacuum cleaners; LED lights can provide outdoor lighting; the emergency power supply itself can be charged by an external power source or by solar energy, which allows the emergency power supply to automatically replenish its power when outdoors. In addition, this emergency power supply is equipped with an alarm system. When the user gets lost or encounters a problem, pressing the alarm will alert the surrounding area through indicator lights or an audible sound, thus achieving the purpose of seeking help. The emergency power supply is also connected to an inverter circuit and an intelligent heating system. The inverter circuit converts the DC power output from the battery pack into AC power, providing power to outdoor devices that require AC power when their battery is low. The intelligent heating system uses heating wires or heating films and thermistors to provide heating even in low ambient temperatures. In situations where normal power supply is affected, the battery pack of the emergency power supply is heated to ensure it can function normally even in low-temperature environments, providing power to external devices. Simultaneously, this emergency power supply is equipped with red and black battery clamps to effectively prevent reversed polarity when using batteries requiring external rescue, providing convenience for the user. (See attached diagram for details.)

[0024] Figure 1 is a schematic diagram of the emergency power supply principle of the present invention;

[0025] Figure 2 is a circuit diagram of the external battery intelligent detection system for the emergency power supply of the present invention (Figure 1); Figure 3 is a circuit diagram of the external battery intelligent detection system in Figure 2 (Figure 2) (Figure 2).

[0026] In the diagram: 1-Charging circuit; 2-Solar panel input circuit; 3-Battery equalization protection circuit; 4-Battery pack; 5-Fuse; 6-External battery intelligent detection system; 7-High current output circuit; 8-Intelligent LED power display system; 9-DC-DC 5V step-down output circuit; 10-12V output circuit; 11-DC-DC 19V boost output circuit; 12-LED driver circuit; 13-LED lighting; 14-MCU control circuit; 15-Alarm system; 16-Intelligent heating system; 17-Inverter circuit; 61-Voltage recognition system circuit; 62-Current recognition system circuit; 63-Relay circuit.

[0027] Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] As shown in Figures 1 to 3, an emergency power supply includes a housing. Inside the housing is a battery pack 4 for storing electrical energy. The input terminal of the battery pack 4 is connected to the output terminals of a charging circuit 1 and a solar panel input circuit 2 for charging the battery pack 4. The output terminal of the battery pack 4 is connected to a high-current output circuit 7 for outputting a large current when the car starts. An external battery intelligent detection system 6 is connected between the battery pack 4 and the high-current output circuit 7. Furthermore, the battery pack 4 is composed of lithium-ion cells connected in series or parallel, using lithium iron phosphate, lithium cobalt oxide, nickel-cobalt-manganese ternary lithium, or lithium manganese oxide as the positive electrode and artificial or natural graphite as the negative electrode. Its output terminal is also connected to multiple DC-DC voltage regulation circuits and an LED driver circuit 12. Each DC-DC voltage regulation circuit is connected to an MCU control circuit 14. The MCU control circuit 14 is also connected to a display circuit. The emergency power supply includes an intelligent LED power display system 8, an LED driver circuit 12 with an LED lighting lamp 13 connected to its output, and a balancing protection circuit 3 connected in parallel across the battery pack 4 to protect it. The DC-DC voltage regulation circuit includes a DC-DC 19V boost output circuit 11 (19V), a DC-DC 12V output circuit 10 (12V), and a DC-DC 5V buck output circuit 9 (5V). Furthermore, the casing of this invention is made of plastic, aluminum alloy, or a combination of these materials. The solar panel input circuit 2 is located on the outside of the casing, and its power range is 0.5W to 50W with an input voltage of 5V to 25V.

[0030] This emergency power supply uses a lithium-ion battery pack, which is lightweight, compact, durable, has a large instantaneous discharge current, and can be repeatedly recharged, meeting the high current requirements for starting a car. By connecting an external intelligent battery detection system between the high-current output circuit and the battery pack, the emergency power supply can effectively control the high-current supply to external devices, ensuring accuracy, reliability, and efficient use of power. The battery pack is also connected to a voltage regulator circuit capable of outputting multiple voltage levels. By connecting the outputs of each voltage regulator circuit to the MCU control circuit, it can meet the outdoor power needs of devices such as mobile phones, computers, digital cameras, car air pumps, car refrigerators, and car vacuum cleaners. LED lights can provide outdoor illumination. The emergency power supply itself can be charged by an external power source, and in the absence of an external power source, it can also be charged by solar energy, allowing it to automatically replenish its power outdoors. Simultaneously, the intelligent LED power display system 14 can monitor the real-time power status of the emergency power supply's battery pack 4.

[0031] The output terminal of the DC-DC 12V output circuit 10 is connected to an alarm system 15 for issuing alarm signals, an inverter circuit 17 for converting the DC power output from the battery pack 4 into AC power, and an intelligent heating system 16 for heating the battery pack 4. The alarm system 15 can be activated by the user when they are lost or encounter a situation. The alarm system 15 will alert the surrounding area through indicator lights or sound to signal for help. The inverter circuit 17 outputs AC power at a voltage of 110V to 220V, allowing for easy connection of this emergency power supply to external devices requiring AC power. This design eliminates the need for voltage adjustment, facilitating power supply during outdoor use when power is insufficient and ensuring normal operation. The inverter circuit 17 can be built into the housing or have an interface on the housing for connection. When AC power is required, an external inverter can be directly connected to this interface to achieve DC-AC conversion, making operation convenient. Additionally, the intelligent heating system 16 includes a heating wire or heating film wound around the outside of the battery pack 4, a thermistor attached to the outer surface of the battery pack 4 and connected to the heating wire or heating film, and a heating start switch to activate the intelligent heating system. The resistance value of the heating wire or heating film ranges from 0.1Ω to 10Ω. ;In use, the upper limit temperature of the surface of battery pack 4 is preset to t, where t ranges from 0 to 70°C. When the ambient temperature is low and has affected the normal power supply, the heating start switch is turned on. If the surface temperature of battery pack 4 fed back to the MCU control circuit 14 through the thermistor is less than t, the heating start switch of the heating wire or heating film is turned on, and current flows through both ends of the heating wire or heating film, and the intelligent heating system 16 begins to heat battery pack 4. Before heating, the heating time is preset to a fixed value d, where d ranges from 10 to 300 seconds. During the heating process, when the surface temperature of battery pack 4 reaches the upper limit temperature t, the heating start switch of the heating wire or heating film is automatically turned off, blocking the current flowing through both ends of the heating wire or heating film. Alternatively, when the heating time reaches d, the heating circuit of the intelligent heating system 16 is automatically turned off, completing the heating of battery pack 4. The intelligent heating system 16 utilizes the heat-sensitive characteristics of its thermistor to accurately control the on / off state of its heating circuit, effectively improving heating efficiency and reducing energy consumption. By adding this intelligent heating system 16, the emergency power supply can still ensure normal battery operation and provide power even when the external ambient temperature is low and affects normal power supply, thus improving the overall system reliability.

[0032] The external battery intelligent detection system 6 includes red and black battery clips for connecting an external battery, a relay for controlling the circuit to turn on or off based on detection signals, a voltage recognition system for identifying the voltage of the external lead-acid battery or lithium-ion starting battery, and a current recognition system for identifying the current passing through the external starting circuit. In this invention, the two ends of the relay coil are connected to the voltage identification system, the input terminal of the relay is connected to the voltage identification system, and the output terminal of the relay is connected to the high-current output circuit 7. The red and black battery clamps are connected via a pluggable reverse connection plug or via wires connected to the positive and negative terminals of the battery pack 4. When the red and black battery clamps are connected to the pluggable reverse connection plug, the pluggable reverse connection plug is connected to the positive and negative terminals of the battery pack 4, and the voltage identification system is connected to the red and black battery clamps. The relay in this invention is a 12V or 24V relay with a current rating of 20A to 300A and 4 to 6 pins. The external battery intelligent detection system 6 is located outside the emergency power supply and is connected to the emergency power supply via the pluggable reverse connection plug, or it is located inside the emergency power supply while the red and black battery clamps are located outside the emergency power supply. Preferably, in this invention, the external battery intelligent detection system 6 is located inside the emergency power supply while the red and black battery clamps are located outside the emergency power supply. The red and black battery clamps are connected to the battery pack 4 via silicone wires or other wires for connection to external devices. Connecting to external batteries via the red and black battery clamps can also effectively prevent short circuits caused by reverse insertion or collisions between the red and black battery clamps.

[0033] When the red and black battery clamps are connected to the positive and negative terminals of the external battery respectively, if the connection is correct, the feedback voltage displayed by the voltage recognition system is positive; otherwise, the feedback voltage is negative. The positive feedback voltage is in the range of ~b, where a is 6~24V and b is 9~30V. When selecting values, a should be less than b. If the connection is reversed, the relay does not work, and the high-current output circuit 7 is in the open state. If the external battery intelligent detection system 6 fails, to ensure the safety of the emergency power supply, a one-time or resettable fuse 5 is connected in series between the battery pack 4 and the external battery intelligent detection system 6 in the emergency power supply circuit of this invention. The current of the fuse 5 is 50A~500A. To ensure the charging and discharging safety of the battery pack 4, an equalization protection circuit 3 is connected to both ends of the battery pack 4 to provide overcurrent, overload, overcharge, and over-discharge protection for the battery pack 4.

[0034] In this invention, when the feedback voltage of the voltage identification system is ~1) and is positive, the relay coil receives the voltage signal, the contacts close, and the output terminal is connected to the high-current output circuit 7. The emergency power supply then begins to supply high-current power to the external equipment. At this time, the current identification system detects the passage of high current. If the current of the output circuit 7 is less than c (where c is 0.1-10A), the voltage signal across the relay coil disappears, the contacts open, and the output terminal disconnects from the high-current output circuit 7, stopping the high-current discharge to external devices. The output voltage of the high-current output circuit 7 is DC12V or DC24V, and the instantaneous current is 100A-600A, which can be used as a starting power source for vehicles in emergency situations. By connecting an external battery intelligent detection system 6 between the high-current output circuit 7 and the battery pack 4, the high-current power supply to external devices can be effectively controlled, accurately and reliably utilizing the power supply's energy. This external battery intelligent detection system 6 can be built into the housing or connected externally.

[0035] Figures 2 and 3 show the circuit diagram of the external battery intelligent detection system 6, where BT1 is the rechargeable battery, i.e., battery pack 4, and BT2 is the car battery being charged.

[0036] Specifically, the circuit 62 of the current identification system includes: a high-precision operational amplifier U3 (model SGM8591), resistors R12, R13, R14, R15, R16, R17, R18, R20, R21, and RS; capacitors C9 and C12; a switching diode D4 (model IN4148); pin 1 of U3 is floating; pin 2 of U3 is connected to one end of R16, one end of R15, and one end of R21; pin 3 of U3 is connected to one end of C12, one end of RS, and the negative terminal of BT2; pin 4 of U3 is grounded together with the negative terminal of BT1 and the other end of RS; pin 5 of U3 is floating; pin 6 of U3 is connected to one end of R20, the other end of R21, and the positive terminal of D4; the other end of R20 is connected to the other end of C12; and pin 7 of U3 is connected to VCC and one end of C9. The other end of C9 is grounded, pin 8 of U3 is left floating, the negative terminal of D4 is connected to one end of R17, the other end of R17 is connected to one end of R18 and IN2, the other end of R18 is grounded, and the other end of R15 is connected to one end of R12, one end of R13 and one end of R14.

[0037] Specifically, the voltage identification system circuit 61 includes: a dual operational amplifier U2 (LM358), a three-terminal voltage regulator U1 (7805), resistors R1, R2, R4, R5, R6, R7, R8, R9, R10, R11, capacitors C1, C2, C3, C4, C5, C6, C7, C8, and Schottky diodes D1 and D2. The model is SS14, and the three-terminal adjustable shunt reference source U4 is model TL431. Pin 1 of U2 is connected to one end of R5, one end of C5, and one end of C4. The other end of R5 is connected to one end of R6 and IN1. The other end of R6 is grounded. Pin 2 of U2 is connected to pin 5 of U2, one end of R11, the cathode of U4, the reference electrode of U4, and the other end of R16. The other end of R11 is connected to VCC. Pin 3 of U2 is connected to the other end of C5, one end of R1, one end of R7, and one end of R8. The other end of R1 is connected to the other end of C4. Pin 4 of U2 is grounded together with the other end of R7, the anode of U4, and one end of R9. The other end of R8 is connected to the negative terminal of D2 and one end of R10. The positive terminal of D2 is connected to the positive terminal of BT2. Pin 6 of U2 is connected to the other end of R10, the other end of R9, and one end of C6. One end of R2 is connected together. Pin 7 of U2 is connected to the other end of C6, one end of C7, and one end of R4. The other end of R4 is connected to point A. The other end of C7 is connected to the other end of R2. Pin 8 of U2 is connected to one end of C8, one end of C2, one end of C3, pin 3 of U1, and VCC. The other end of C8 is grounded. The other ends of C2 and C3 are grounded together. Pin 1 of U1 is connected to one end of C1 and the negative terminal of D1. Pin 2 of U1 is grounded together with the other end of C1. The positive terminal of D1 is connected to the positive terminal of BT1.

[0038] Specifically, the relay circuit 63 includes: a three-terminal voltage regulator chip U5 (model XC6219), resistors R3, R19, and R22, capacitors C1, C13, and C14, a Schottky diode D5 (model SS14), an MCU control chip J1, control switches Q1, Q2, and Q3 (model SI2300), and a relay. Pin 1 of U5 is connected to one end of C13, pin 3 of U5, and the VCC terminal. Pin 2 of U5 is grounded together with the other end of C13, one end of C14, and pin 2 of J1. Pin 4 of U5 is left floating. Pin 5 of U5 is connected to the other end of C14 and pin 1 of J1. Pin 3 of J1 is connected to the IN1 terminal, pin 4 of J1 is connected to the OUT1 terminal, pin 5 of J1 is connected to the IN2 terminal, and pin 6 of J1 is connected to the OUT2 terminal. Pin 7 of J1 is left floating, pin 8 of J1 is left floating, OUT1 is connected to one end of R3, the other end of R3 is connected to the gate of Q2, the drain of Q2 is connected to the source of Q3, the other end of R13 is connected together, the drain of Q3 is connected to the other end of R12, and the gate of Q3 is connected to... Connect to point A. Connect the source of Q2 to the source of Q1 and the other end of R14. Connect the gate of Q1 to one end of R19. Connect the other end of R19 to OUT2. Connect the drain of Q1 to the positive terminal of D5 and one end of the relay coil. Connect the negative terminal of D5, the other end of the relay coil, one end of the normally open contact of the relay, and one end of R22 to the positive terminal of BT1. Connect the other end of R22 to one end of C11. Connect the other end of C11 to the other end of the normally open contact of the relay and the positive terminal of BT2.

[0039] When the emergency power supply is disconnected from the external rechargeable battery, or when the current is less than the set current value, resistors R15 and R16 in circuit 62 of the current identification system provide a detection signal to U3. At this time, U3 sends an output signal to the MCU control chip based on the detection signal, so that the MCU control chip can determine the connection or disconnection status of the circuit and make appropriate instructions. When the output voltage is lower than the predetermined value, which is 8.1V in this invention, resistors R7 and R8 in circuit 61 of the voltage identification system provide a detection signal to U2. U2 sends an output signal to the IN1 terminal based on the detection signal. The MCU control chip then controls the control switch Q2 in circuit 63 of the relay based on the signal from the IN1 terminal. When the output voltage is higher than the predetermined value, which is 12.6V in this invention, resistors R9 and R10 in circuit 61 of the voltage identification system provide a detection signal to U2. U2 sends a signal to control the control switch Q3 in circuit 63 of the relay based on the detection signal. In this invention, the combined action of circuit 61 of the voltage identification system and circuit 62 of the current identification system provides signals to the MCU control chip. Through the judgment of the MCU control chip, the purpose of controlling Q1, Q2 and Q3 in circuit 63 of the relay is ultimately achieved, thereby achieving the effects of charging and protection.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

Claims 1. An emergency power supply, comprising a housing, wherein a battery pack (4) for storing electrical energy is disposed inside the housing, characterized in that: The input terminal of the battery pack (4) is connected to the output terminal of the charging circuit (1) for charging the battery pack (4) and the solar panel input circuit (2). The output terminal of the battery pack (4) is connected to a high-current output circuit (7) for outputting a large current when the car starts. An external battery intelligent detection system (6) is connected between the battery pack (4) and the high-current output circuit (7).

2. An emergency power supply according to claim 1, characterized in that: The battery pack (4) is composed of lithium-ion cells connected in series or in parallel, with lithium iron phosphate, lithium cobalt oxide, nickel cobalt manganese ternary lithium or lithium manganese oxide as positive electrodes and artificial or natural graphite as negative electrodes. Its output terminal is also connected to multiple DC-DC voltage regulation circuits and LED driving circuits (12). Each DC-DC voltage regulation circuit is connected to an MCU control circuit (14). The MCU control circuit (14) is also connected to an intelligent LED power display system (8) for displaying the power of the emergency power supply. The output terminal of the LED driving circuit (12) is connected to an LED lighting lamp (13). The two ends of the battery pack (4) are connected in parallel to a balance protection circuit (3) for protecting the battery pack (4).

3. An emergency power supply according to claim 1, characterized in that: The external battery intelligent detection system (6) includes red and black battery clips for connecting external batteries, a relay for controlling the circuit to turn on or off according to the detection signal, a voltage recognition system for identifying the voltage of the external lead-acid battery or lithium-ion starting battery, and a current recognition system for identifying the current passing through the external starting circuit. The two ends of the relay coil are connected to the voltage recognition system, the input end of the relay is connected to the voltage recognition system, and the output end of the relay is connected to the high-current output circuit (7). The red and black battery clips are connected via a pluggable reverse connection plug or via wires soldered to the positive and negative ends of the battery pack (4). The pluggable reverse connection plug is connected to the positive and negative ends of the battery pack (4). The voltage recognition system is connected to the red and black battery clips. The relay is a 12V or 24V relay with a current rating of 20A to 300A and 4 to 6 pins. The external battery intelligent detection system (6) is located outside the emergency power supply and is connected to the emergency power supply via the pluggable reverse connection plug. Alternatively, the battery clamps can be installed inside the emergency power supply, while the red and black battery clamps can be installed outside the emergency power supply.

4. An emergency power supply according to claim 3, characterized in that: When the red and black battery clips are connected to the positive and negative terminals of the external battery respectively, if they are connected correctly, the feedback voltage displayed by the voltage recognition system is positive; otherwise, the feedback voltage is negative. The positive feedback voltage is in the range of a to b, where a is 6 to 24V and b is 9 to 30V. When the values ​​are taken, a is less than b. When the feedback voltage is a to b and is positive, the coil of the relay receives an electrical signal, the contacts close, and the output terminal is connected to the high-current output circuit (7). The emergency power supply begins to supply high current to the external equipment. At this time, the current recognition system detects the current passing through the high-current output circuit (7). If the current is less than c, where c is 0.1 to 10A, the electrical signal at both ends of the relay coil disappears, the contacts open, the output terminal disconnects from the high-current output circuit (7), and the high-current discharge to the external equipment stops. The output voltage of the high-current output circuit (7) is DC12V or DC24V. The instantaneous current is 100A to 600A.

5. An emergency power supply according to claim 2, characterized in that: The DC-DC voltage regulation circuit includes a DC-DC 19V boost output circuit (11) with an output voltage of 19V, a DC-DC 12V output circuit (10) with an output voltage of 12V, and a DC-DC 5V buck output circuit with an output voltage of 5V. (9) 。 6. An emergency power supply according to claim 5, characterized in that: The output terminal of the DC-DC12V output circuit (10) is connected to an alarm system (15) for issuing alarm signals, an inverter circuit (17) for converting the DC power output by the battery pack (4) into AC power, and an intelligent heating system (16) for heating the battery pack (4).

7. An emergency power supply according to claim 6, characterized in that: The inverter circuit (17) outputs AC voltage of 110V to 220V. The inverter circuit (17) is either built into the housing or connected to the housing externally.

8. An emergency power supply according to claim 6, characterized in that: The intelligent heating system (16) includes a heating wire or heating film wrapped around the outside of the battery pack (4), a thermistor attached to the outer surface of the battery pack (4) and connected to the heating wire or heating film, and a heating start switch to activate the intelligent heating system (16); the resistance value of the heating wire or heating film is in the range of 0.1Ω to 10Ω; the upper limit temperature of the surface of the battery pack (4) is preset to t, and the range of t is 0 to 70°C. At this time, the heating start switch is turned on. If the surface temperature of the battery pack (4) fed back to the MCU control circuit (14) through the thermistor is less than t, the heating start switch is turned on, and the current is conducted at both ends of the heating wire or heating film to start heating the battery pack (4). The heating time is preset to a fixed value d, and the range of d is 10 to 300s. When the surface temperature of the battery pack (4) reaches the upper limit temperature t, the heating start switch is automatically turned off, or when the heating time reaches d, The heating circuit of the intelligent heating system is automatically disconnected.

9. An emergency power supply according to claim 1, characterized in that: The housing is made of plastic, aluminum alloy or a mixture of materials. The solar panel input circuit (2) is located on the outside of the housing. The power of the solar panel input circuit (2) is 0.5W to 50W and the input voltage is 5V to 25V.

10. An emergency power supply according to claim 1, characterized in that: The output terminal of the battery pack (4) is connected to the external battery intelligent detection system (6) by a one-time or resettable fuse (5), the current of which is 50A to 500A.

11. An emergency power supply according to claim 3, characterized in that, The circuit (62) of the current identification system includes: a high-precision operational amplifier U3, model SGM8591; resistors R12, R13, R14, R15, R16, R17, R18, R20, R21, RS; capacitors C9 and C12; a switching diode D4, model IN4148; pin 1 of U3 is floating; pin 2 of U3 is connected to one end of R16, one end of R15, and one end of R21; pin 3 of U3 is connected to one end of C12, one end of RS, and the negative terminal of BT2; pin 4 of U3 is grounded together with the negative terminal of BT1 and the other end of RS; pin 5 of U3 is floating; pin 6 of U3 is connected to one end of R20, the other end of R21, and the positive terminal of D4; the other end of R20 is connected to the other end of C12; pin 7 of U3 is connected to the VCC terminal... One end of C9 is connected together, the other end of C9 is grounded, pin 8 of U3 is left floating, the negative terminal of D4 is connected to one end of R17, the other end of R17 is connected to one end of R18 and IN2, the other end of R18 is grounded, and the other end of R15 is connected to one end of R12, one end of R13 and one end of R14.

12. An emergency power supply according to claim 11, characterized in that: The circuit (61) of the voltage identification system includes: a dual operational amplifier U2, model LM358; a three-terminal voltage regulator circuit U1, model 7805; resistors R1, R2, R4, R5, R6, R7, R8, R9, R10, R11; capacitors C1, C2, C3, C4, C5, C6, C7, C8; Schottky diodes D1, D2, model SS14; a three-terminal adjustable shunt reference source U4, model TL431; pin 1 of U2 is connected to one end of R5, one end of C5, and one end of C4; the other end of R5 is connected to one end of R6 and IN1; the other end of R6 is grounded; pin 2 of U2 is connected to pin 5 of U2, one end of R11, the cathode of U4, the reference of U4, and the other end of R16; the other end of R11 is connected to VCC; pin 3 of U2 is connected to C5... The other end of R1, one end of R7, and one end of R8 are connected together. The other end of R1 is connected to the other end of C4. Pin 4 of U2 is grounded together with the other end of R7, the anode of U4, and one end of R9. The other end of R8 is connected together with the cathode of D2 and one end of R10. The anode of D2 is connected to the anode of BT2. Pin 6 of U2 is connected together with the other end of R10, the other end of R9, one end of C6, and one end of R2. Pin 7 of U2 is connected together with the other end of C6, one end of C7, and one end of R4. The other end of R4 is connected to point A. The other end of C7 is connected to the other end of R2. Pin 8 of U2 is connected together with one end of C8, one end of C2, one end of C3, pin 3 of U1, and VCC. The other end of C8 is grounded. The other ends of C2 and C3 are grounded together. Pin 1 of U1 is connected together with one end of C1 and the cathode of D1. Pin 2 of U1 is grounded together with the other end of C1, and the positive terminal of D1 is connected to the positive terminal of BT1.

13. An emergency power supply according to claim 12, characterized in that: The relay circuit (63) includes: a three-terminal voltage regulator chip U5, model XC6219; resistors R3, R19, R22; capacitors C1, C13, C14; a Schottky diode D5, model SS14; an MCU control chip J1; control switches Q1, Q2, Q3, model SI2300; a relay; pin 1 of U5 is connected to one end of C13, pin 3 of U5, and VCC; pin 2 of U5 is grounded together with the other end of C13, one end of C14, and pin 2 of J1; pin 4 of U5 is left floating; pin 5 of U5 is connected to the other end of C14 and pin 1 of J1; pin 3 of J1 is connected to IN1; pin 4 of J1 is connected to OUT1; pin 5 of J1 is connected to IN2; pin 6 of J1 is connected to OUT2; pin 7 of J1 is left floating. Pin 8 of J1 is left floating. OUT1 is connected to one end of R3. The other end of R3 is connected to the gate of Q2. The drain of Q2 is connected to the source of Q3 and the other end of R13. The drain of Q3 is connected to the other end of R12. The gate of Q3 is connected to point A. The source of Q2 is connected to the source of Q1 and the other end of R14. The gate of Q1 is connected to one end of R19. The other end of R19 is connected to OUT2. The drain of Q1 is connected to the positive terminal of D5 and one end of the relay coil. The negative terminal of D5, the other end of the relay coil, one end of the normally open contact of the relay, and one end of R22 are connected to the positive terminal of BT1. The other end of R22 is connected to one end of C11. The other end of C11 is connected to the other end of the normally open contact of the relay and the positive terminal of BT2.