Dual-purpose power supply for automobile emergency start and inverter

Abstract

The invention belongs to the field of power supplies, particularly relates to a dual-purpose power supply for an automobile emergency start and an inverter, and aims to solve the problems that an existing emergency start power supply in the market is powered by a built-in lithium battery, is small in battery capacity and limited in use times, and needs to be charged after being used. A traditional inverter needs to be externally connected with a battery to work and is inconvenient to use. In order to solve the problems that in the prior art, in particular an external battery is large in size and not easy to move, the emergency starting power supply comprises a DC / DC converter, a high-frequency boost inverter circuit, a full-bridge rectifier circuit, a DC12V output circuit, an inverter bridge inverter circuit, an absorption loop circuit and a control protection unit, a built-in lithium battery of the emergency starting power supply on the market is omitted, and the cost is reduced. The power supply is flexible, convenient and fast, does not need to be charged, and can be used at any time. The inverter overcomes the defects that a traditional inverter can only be connected with a fixed battery, is fixed in use place, is not universal and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of power supplies, and in particular to a dual-purpose power supply for automobile emergency starting and inverter. Background Art

[0002] New dual-purpose car jump starters and inverters are designed to jump-start a car when its battery is low or faulty, while also providing an inverter function. When a car is left unused for an extended period or when its battery capacity is reduced due to cold weather, it may not start or may have difficulty starting. This requires a jump start (commonly known as a "jump start"). However, this requires a working car. The waiting time and the likelihood of a successful jump start are all issues. Our jump starter can solve this problem at any time. It can jump-start the car and also function as an inverter. An inverter is a device that converts direct current (DC) to alternating current (AC), typically converting 12V DC (24V, etc.) to 220V AC, the same as mains electricity, to power electrical equipment. Commercial jump starters are powered by built-in lithium batteries, which have a small capacity, a limited lifespan, and require recharging. Traditional inverters require an external battery, making them inconvenient to use. External batteries are particularly bulky and difficult to transport.

[0003] Therefore, we propose a dual-purpose power supply for automobile emergency starter and inverter to solve the above problems. Summary of the Invention

[0004] The present invention aims to address the existing shortcomings of commercially available emergency starting power supplies, which rely on built-in lithium batteries, resulting in low battery capacity, limited lifespan, and the need for recharging. Conventional inverters require external batteries, making them inconvenient to use. In particular, external batteries are bulky and difficult to transport. The present invention proposes a dual-purpose power supply for automobile emergency starting and inverters.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A dual-purpose power supply for automobile emergency starting and inverter, comprising:

[0007] DC / DC converter, high-frequency boost inverter circuit, full-bridge rectifier circuit, DC12V output circuit, inverter bridge inverter circuit, absorption loop circuit, control protection unit; the DC / DC converter, high-frequency boost inverter circuit, and full-bridge rectifier circuit are connected in sequence, and the full-bridge rectifier circuit is respectively connected to the DC12V output circuit, inverter bridge inverter circuit, and control protection unit; and the DC12V output circuit is respectively connected to the inverter bridge inverter circuit and the control protection unit; the inverter bridge inverter circuit is respectively connected to the absorption loop circuit and the control protection unit; the absorption loop circuit and the control protection unit are respectively connected to the DC / DC converter and the high-frequency boost inverter circuit.

[0008] Preferably, the control protection unit includes an undervoltage protection circuit, an overvoltage protection circuit, a first overcurrent protection circuit, a control circuit, a voltage regulator, and a second overcurrent protection circuit; the undervoltage protection circuit is respectively connected to the DC / DC converter and the control circuit, and the overvoltage protection circuit is respectively connected to the DC / DC converter and the control circuit, and the first overcurrent protection circuit is respectively connected to the high-frequency boost inverter circuit and the control circuit.

[0009] Preferably, the control circuit is respectively connected to the high-frequency boost inverter circuit, the voltage regulator and the second overcurrent protection circuit, and the voltage regulator is respectively connected to the full-bridge rectifier circuit, the DC12V output circuit and the inverter bridge inverter circuit, and the second overcurrent protection circuit is connected to the inverter bridge inverter circuit.

[0010] Preferably, the DC / DC converter is connected to an input circuit; and the absorption loop circuit is connected to an AC220V output circuit, and the AC220V output circuit is connected to a useful electrical appliance / load.

[0011] Preferably, the DC / DC converter adopts a half-bridge variable frequency LLC resonant converter.

[0012] Preferably, it also includes a fault detection unit, which is respectively connected to the DC / DC converter, high-frequency boost inverter circuit, full-bridge rectifier circuit, DC12V output circuit, inverter bridge inverter circuit, absorption loop circuit, and control protection unit for fault detection.

[0013] Preferably, it further comprises an input and output detection unit, which is respectively connected to the DC / DC converter, the DC12V output circuit, the AC220V output circuit and the control protection unit, and is used to detect the stability of the input and output.

[0014] Preferably, it further comprises a recording unit, which is connected to the control and protection unit and is used to record the operating data.

[0015] In the present invention, the beneficial effects of the dual-purpose power supply for automobile emergency starting and inverter are:

[0016] The new automobile emergency start and inverter dual-purpose power supply is equipped with a high-performance DC / DC conversion module. It can use different input voltages (such as 12V to 96V, etc.) to convert DC12V and AC220V power anytime and anywhere, allowing us to emergency start the car and use AC power equipment anywhere without AC power.

[0017] This invention eliminates the built-in lithium battery of existing emergency starting power supplies, reducing costs. This makes power access flexible, convenient, and fast, allowing for immediate use without recharging. This inverter overcomes the shortcomings of traditional inverters, which can only be connected to fixed batteries, have limited use locations, and are not universally applicable. Furthermore, there are no similar products on the market, resulting in broad market prospects and considerable economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a functional block diagram of a dual-purpose power supply for automobile emergency starting and inverter proposed by the present invention;

[0019] Figure 2 This is a schematic diagram of the principle of a half-bridge variable frequency LLC resonant converter for a dual-purpose power supply for automobile emergency starting and inverter proposed by the present invention. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] Example

[0022] Reference Figure 1-Figure 2 , a dual-purpose power supply for automobile emergency start and inverter, comprising:

[0023] DC / DC converter, high-frequency boost inverter circuit, full-bridge rectifier circuit, DC12V output circuit, inverter bridge inverter circuit, absorption loop circuit, control protection unit; the DC / DC converter, high-frequency boost inverter circuit, and full-bridge rectifier circuit are connected in sequence, and the full-bridge rectifier circuit is respectively connected to the DC12V output circuit, inverter bridge inverter circuit, and control protection unit; and the DC12V output circuit is respectively connected to the inverter bridge inverter circuit and the control protection unit; the inverter bridge inverter circuit is respectively connected to the absorption loop circuit and the control protection unit; the absorption loop circuit and the control protection unit are respectively connected to the DC / DC converter and the high-frequency boost inverter circuit.

[0024] In this embodiment, the control and protection unit includes an undervoltage protection circuit, an overvoltage protection circuit, a first overcurrent protection circuit, a control circuit, a voltage regulator, and a second overcurrent protection circuit; the undervoltage protection circuit is respectively connected to the DC / DC converter and the control circuit, and the overvoltage protection circuit is respectively connected to the DC / DC converter and the control circuit, and the first overcurrent protection circuit is respectively connected to the high-frequency boost inverter circuit and the control circuit.

[0025] In this embodiment, the control circuit is respectively connected to the high-frequency boost inverter circuit, the voltage regulator and the second overcurrent protection circuit, and the voltage regulator is respectively connected to the full-bridge rectifier circuit, the DC12V output circuit, and the inverter bridge inverter circuit, and the second overcurrent protection circuit is connected to the inverter bridge inverter circuit.

[0026] In this embodiment, the DC / DC converter is connected to an input circuit; and the absorption loop circuit is connected to an AC220V output circuit, and the AC220V output circuit is connected to a useful electrical appliance / load.

[0027] In this embodiment, the DC / DC converter adopts a half-bridge variable frequency LLC resonant converter.

[0028] In this embodiment, a fault detection unit is also included, which is respectively connected to the DC / DC converter, the high-frequency boost inverter circuit, the full-bridge rectifier circuit, the DC12V output circuit, the inverter bridge inverter circuit, the absorption loop circuit, and the control protection unit for fault detection.

[0029] In this embodiment, an input and output detection unit is further included. The input and output detection unit is respectively connected to the DC / DC converter, the DC12V output circuit, the AC220V output circuit and the control protection unit to detect the stability of the input and output.

[0030] In this embodiment, a recording unit is further included. The recording unit is connected to the control and protection unit and is used to record the operating data.

[0031] The present invention provides a novel dual-purpose automobile emergency starter and inverter power supply, comprised of a DC / DC converter, high-frequency step-up inverter, full-bridge rectifier, 12V DC output, inverter bridge inverter, absorption circuit, and control and protection circuits. In particular, the built-in wide-range input DC / DC converter module ensures that users receive both 12V DC and 220V AC power in environments with batteries, lithium batteries, electric vehicles, and electric cars. This allows convenient use of computers, notebooks, fax machines, printers, scanners, game consoles, DVDs, stereos, cameras, electric fans, lighting fixtures, power tools, car refrigerators, and various travel, camping, and medical emergency appliances. It can also charge battery-powered devices such as mobile phones, electric shavers, digital cameras, notebooks, video cameras, and Bluetooth speakers. This eliminates the need for users to select DC voltages, such as 5V, 9V, 12V, 19V, 24V, 48V, 60V, 72V, and 96V, as is the case with DC power.

[0032] In addition to operating with 12V and 24V batteries and lithium batteries in cars, it can also use 36V, 48V, 60V, 72V, and 96V power supplies from electric bicycles and electric cars. It automatically identifies the input voltage, adjusts itself, and operates independently, expanding its application range and achieving a generally universal effect.

[0033] This new dual-purpose automotive emergency starter and inverter power supply utilizes a novel half-bridge variable-frequency LLC resonant converter for its input stage (DC / DC converter). Compared to traditional resonant converters, this converter offers exceptional performance, enabling more stable voltage and current over a wide input voltage range. Its structure is simple, control is easy, and even parasitic components can participate in the resonant process. The primary switching diode achieves zero voltage switch-on (ZVS), minimizing shutdown current. The secondary rectifier diode achieves zero current shutdown (ZCS), eliminating diode losses and oscillation during reverse recovery. Pulse frequency modulation (PFM) is used for control, maintaining a switch duty cycle of 0.5. This eliminates the issue of large duty cycle variations over a wide input voltage range, increases the switching frequency, and further reduces the size and weight of the converter. This significantly improves converter efficiency, reaching a maximum efficiency exceeding 90%.

[0034] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A dual-purpose power supply for automobile emergency start and inverter, characterized in that: include: DC / DC converter, high-frequency boost inverter circuit, full-bridge rectifier circuit, DC12V output circuit, inverter bridge inverter circuit, absorption loop circuit, control and protection unit; the DC / DC converter, high-frequency boost inverter circuit, and full-bridge rectifier circuit are connected in sequence, and the full-bridge rectifier circuit is respectively connected to the DC12V output circuit, the inverter bridge inverter circuit, and the control and protection unit; and the DC12V output circuit is respectively connected to the inverter bridge inverter circuit and the control and protection unit; the inverter bridge inverter circuit is respectively connected to the absorption loop circuit and the control and protection unit; the absorption loop circuit and the control and protection unit are respectively connected to the DC / DC converter and the high-frequency boost inverter circuit.

2. The dual-purpose power supply for automobile emergency starting and inverter according to claim 1, characterized in that: The control and protection unit includes an undervoltage protection circuit, an overvoltage protection circuit, a first overcurrent protection circuit, a control circuit, a voltage regulator, and a second overcurrent protection circuit; the undervoltage protection circuit is respectively connected to the DC / DC converter and the control circuit, and the overvoltage protection circuit is respectively connected to the DC / DC converter and the control circuit, and the first overcurrent protection circuit is respectively connected to the high-frequency boost inverter circuit and the control circuit.

3. The dual-purpose power supply for automobile emergency starting and inverter according to claim 2, characterized in that: The control circuit is respectively connected to the high-frequency boost inverter circuit, the voltage regulator and the second overcurrent protection circuit, and the voltage regulator is respectively connected to the full-bridge rectifier circuit, the DC12V output circuit and the inverter bridge inverter circuit, and the second overcurrent protection circuit is connected to the inverter bridge inverter circuit.

4. The dual-purpose power supply for automobile emergency starting and inverter according to claim 3, characterized in that: The DC / DC converter is connected to an input circuit; and the absorption loop circuit is connected to an AC220V output circuit, and the AC220V output circuit is connected to a useful electrical appliance / load.

5. The dual-purpose power supply for automobile emergency starting and inverter according to claim 4, characterized in that: The DC / DC converter adopts a half-bridge variable frequency LLC resonant converter.

6. The dual-purpose power supply for automobile emergency starting and inverter according to claim 5, characterized in that: It also includes a fault detection unit, which is respectively connected to the DC / DC converter, high-frequency boost inverter circuit, full-bridge rectifier circuit, DC12V output circuit, inverter bridge inverter circuit, absorption loop circuit, and control protection unit for fault detection.

7. The dual-purpose power supply for automobile emergency starting and inverter according to claim 6, characterized in that: It also includes an input and output detection unit, which is connected to the DC / DC converter, the DC12V output circuit, the AC220V output circuit and the control protection unit respectively, and is used to detect the stability of the input and output.

8. The dual-purpose power supply for automobile emergency starting and inverter according to claim 7, characterized in that: It also includes a recording unit, which is connected to the control and protection unit and is used to record the operating data.

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