CN105186664B - A kind of vehicle power supply - Google Patents

Abstract

The invention relates to a vehicle-mounted power supply, which belongs to the technical field of vehicle-mounted power supplies; the technical problem to be solved is: to provide a vehicle-mounted power supply that can charge electronic equipment when the voltage of the vehicle battery is low; the adopted technical scheme is: a. A vehicle-mounted power supply, comprising a housing and a power conversion circuit board arranged inside the housing, the power conversion circuit board comprising: a charging control unit, a rechargeable battery unit, an inverter unit, an undervoltage protection unit, a DC power output unit and AC power output unit; the front panel of the housing is provided with a solar panel, and the right panel of the housing is provided with a power switch, a USB power output port and an AC power output port, and the left panel of the housing is There is a battery power indicator light on it; it is suitable for power systems.

Description

A vehicle power supply

technical field

The invention relates to a vehicle-mounted power supply, which belongs to the technical field of vehicle-mounted power supplies.

Background technique

In the process of power inspection, in order to ensure the efficiency and reliability of the power operation process, electric power workers usually use electronic devices such as inspection instruments and power mobile operation terminals to record the on-site conditions during the inspection process, and through electronic equipment Perform data transmission with the power background server to solve various problems in the operation process in a timely manner; then, during the above operation process, because the operation environment is mostly a wild uninhabited area, it usually occurs that the on-site data collection cannot be performed due to the low power of the electronic equipment The problem has greatly hindered the work efficiency of the operators.

In order to solve the problem that the electronic equipment is low in power and unable to work, power companies usually use the vehicle power supply to charge the electronic equipment. However, the current vehicle power supply is generally connected to the car cigarette lighter or battery through the power input interface of the vehicle power supply. Obtain power; the problem with this method is that in order to ensure the normal driving of the car when the voltage of the car battery is low, the power consumption of the external load device must be interrupted, making it impossible to provide power for the electronic devices that must be used during the power operation. The power supply is carried out, which brings inconvenience to the on-site workers.

Contents of the invention

The invention overcomes the deficiencies in the prior art, and the technical problem to be solved is: to provide an on-vehicle power supply capable of charging electronic equipment when the voltage of the vehicle storage battery is low.

In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:

A vehicle-mounted power supply, comprising a casing and a power conversion circuit board arranged inside the casing, the power conversion circuit board including: a charging control unit, a rechargeable battery unit, an inverter unit, an undervoltage protection unit, and a DC power output unit and an AC power output unit; the front panel of the housing is provided with a solar panel, the right panel of the housing is provided with a power switch, a USB power output port and an AC power output port, and the left side of the housing is The panel is provided with a battery power display lamp; the output end of the solar panel is connected to the input end of the rechargeable battery unit through the charging control unit, and the output end and the power switch of the rechargeable battery unit are connected to the inverter unit The input terminal is connected, the power detection terminal of the rechargeable battery unit is connected with the input terminal of the undervoltage protection unit; the output terminal of the inverter unit is respectively connected with the input terminal of the DC power output unit and the input of the AC power output unit. The output terminals of the DC power output unit are connected to the USB power output port, the AC power output unit is connected to the AC power output port, and the output terminal of the undervoltage protection unit is connected to the battery power indicator light.

In the present invention, the power conversion circuit board further includes: a power positive input connector A1 and a power negative input connector A2, and a power positive input interface and a power negative input interface are also provided on the left side panel of the housing. The positive input connector A1 and the negative input connector A2 of the power supply are respectively connected to the inverter unit, the positive input interface of the power supply is connected to the positive input connector A1 of the power supply, and the negative input interface of the power supply is connected to the negative input connector A2 of the power supply.

The charging control unit includes: a first sampling unit, a second sampling unit, a CPU processing unit, an A/D converter, a DC/DC converter, a diode D1, a transistor T1 and a capacitor C1;

The input end of the first sampling unit is connected to the current signal detection end of the solar panel, the output end of the first sampling unit is connected to the first signal input end of the CPU processing unit through the A/D converter, and the The second signal input end of the CPU processing unit is connected to the voltage signal detection end of the rechargeable battery unit through the second sampling unit, the control end of the CPU processing unit is connected to the source stage of the transistor T1, and the gate of the transistor T1 is connected to the The cathode of the diode D1 is connected, the anode of the diode D1 is connected to the output terminal of the solar panel, and the drain of the transistor T1 is connected to the input terminal of the rechargeable battery unit through the sequentially connected capacitor C1 and the DC/DC converter.

Compared with the prior art, the present invention has the following beneficial effects:

1. The present invention includes: a casing and a power conversion circuit board arranged inside the casing, and the power conversion circuit board includes: a charging control unit, a rechargeable battery unit, an inverter unit, an undervoltage protection unit, and a DC power output unit and an AC power output unit; the front panel of the housing is provided with a solar panel, the right panel of the housing is provided with a power switch, a USB power output port and an AC power output port, and the left side of the housing is The panel is provided with a battery power display lamp; the output end of the solar panel is connected to the input end of the rechargeable battery unit through the charging control unit, and the output end and the power switch of the rechargeable battery unit are connected to the inverter unit The input terminal is connected, the power detection terminal of the rechargeable battery unit is connected with the input terminal of the undervoltage protection unit; the output terminal of the inverter unit is respectively connected with the input terminal of the DC power output unit and the input of the AC power output unit. Both ends are connected, the output end of the DC power output unit is connected to the USB power output port, the AC power output unit is connected to the AC power output port, and the output end of the undervoltage protection unit is connected to the battery power indicator light; use At this time, turn on the power switch on the right side panel of the casing, so that the present invention is in the power supply state of the rechargeable battery unit. Through the solar panel and the rechargeable battery unit, a new energy form can be provided for the power supply of the external electronic equipment, so that in the When the voltage of the vehicle battery is low, it can also charge the external electronic equipment, which improves the reliability of the on-site operation equipment.

2. The power conversion circuit board of the present invention includes: the positive input connector A1 of the power supply and the negative input connector A2 of the power supply, and the positive input interface of the power supply and the negative input interface of the power supply are also provided on the left side panel of the housing. When low, the operator can choose to connect with the cigarette lighter outlet of the vehicle or the car battery through the positive input interface of the power supply and the negative input interface of the power supply to charge the electronic equipment, as a supplementary form of the vehicle power supply, which improves the reliability of on-site operations .

3. The present invention includes a USB power output port and an AC power output port. The operator can flexibly select the power output port according to the charging connector of the electronic equipment on site, so as to facilitate charging of various electronic equipment.

Description of drawings

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Fig. 1 is the schematic diagram of circuit structure of the present invention;

Fig. 2 is a schematic diagram of the circuit structure of the charging control unit in the present invention;

Fig. 3 is a schematic diagram of the external structure of the present invention;

Fig. 4 is a schematic diagram of the internal structure of the present invention;

In the figure: 1 is the casing, 2 is the source conversion circuit board, 3 is the charging control unit, 4 is the rechargeable battery unit, 5 is the inverter unit, 6 is the undervoltage protection unit, 7 is the DC power output unit, 8 is the AC power output unit, 9 is a power switch, 10 is a USB power output port, 11 is an AC power output port, 12 is a battery power indicator, 13 is a solar panel, 14 is a positive power input interface, 15 is a negative power input interface, 16 is a first sampling unit, 17 is a second sampling unit, 18 is a CPU processing unit, 19 is an A/D converter, and 20 is a DC/DC converter.

Detailed ways

A vehicle power supply, comprising a casing 1 and a power conversion circuit board 2 arranged inside the casing 1, the power conversion circuit board 2 includes: a charging control unit 3, a rechargeable battery unit 4, an inverter unit 5, an undervoltage Protection unit 6, DC power output unit 7 and AC power output unit 8; a solar panel 13 is provided on the front panel of the housing 1, a power switch 9, a USB power output are provided on the right panel of the housing 1 Port 10 and AC power output port 11, the left side panel of the housing 1 is provided with a battery power indicator 12; the output end of the solar panel 13 is connected to the input end of the rechargeable battery unit 4 through the charging control unit 3 , the output terminal of the rechargeable battery unit 4 and the power switch 9 are connected to the input terminal of the inverter unit 5, the power detection terminal of the rechargeable battery unit 4 is connected to the input terminal of the undervoltage protection unit 6 connected; the output end of the inverter unit 5 is connected to the input end of the DC power output unit 7 and the input end of the AC power output unit 8 respectively, and the output end of the DC power output unit 7 is connected to the USB power output port 10 , the AC power output unit 8 is connected to the AC power output port 11, and the output terminal of the undervoltage protection unit 6 is connected to the battery power display light 12; when in use, turn on the power switch 9 located on the right side panel of the casing, The present invention is in the power supply state of the rechargeable battery unit 4, through the solar panel 13 and the rechargeable battery unit 4, a new form of energy can be provided for the power supply of external electronic equipment, so that when the voltage of the vehicle storage battery is low, it can also Charging external electronic equipment improves the reliability of field operation equipment.

Specifically, the power conversion circuit board 2 further includes: a positive power input connector A1 and a negative power input connector A2, and a positive power input interface 14 and a negative power input interface 15 are provided on the left side panel of the housing 1. The positive input connector A1 of the power supply and the negative input connector A2 of the power supply are respectively connected to the inverter unit 5, the positive input interface 14 of the power supply is connected to the positive input connector A1 of the power supply, and the negative input interface 15 of the power supply is connected to the negative input connector A2 of the power supply When the present invention is used, when the rechargeable battery unit 4 electric quantity is low, the operator can choose to directly connect with the cigarette lighter outlet or the car storage battery of the vehicle through the positive input interface 14 of the power supply and the negative input interface 15 of the power supply, and carry out electronic equipment Charging, as a supplementary form of on-board power supply, further improves the reliability of on-site operations.

Further, the charging control unit 3 includes: a first sampling unit 16, a second sampling unit 17, a CPU processing unit 18, an A/D converter 19, a DC/DC converter 20, a diode D1, a transistor T1 and a capacitor C1 The input end of the first sampling unit 16 is connected with the current signal detection end of the solar panel 13, and the output end of the first sampling unit 16 passes through the A/D converter 19 and the first signal of the CPU processing unit 18 The input terminal is connected, the second signal input terminal of the CPU processing unit 18 is connected with the voltage signal detection terminal of the rechargeable battery unit 4 through the second sampling unit 17, the control terminal of the CPU processing unit 18 is connected with the source stage of the transistor T1 The gate of the transistor T1 is connected to the cathode of the diode D1, the anode of the diode D1 is connected to the output terminal of the solar panel 13, and the drain of the transistor T1 is connected to the capacitor C1 and the DC/DC converter in sequence. 20 is connected to the input terminal of the rechargeable battery unit 4 .

The present invention is an on-vehicle power supply, which provides an on-vehicle power supply that can charge electronic equipment when the voltage of the vehicle battery is low. Described in detail, but the present invention is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (1)

1. a kind of vehicle power supply, it is characterised in that：

Be included in vehicle accumulator voltage it is relatively low in the case of, a kind of vehicle power supply charges for external electronic device；

Work as rechargeable cell（4）When electricity is relatively low, operating personnel may be selected through positive pole input interface（14）And electricity Source cathode input interface（15）Cigar lighter outlet or automobile storage battery with vehicle are directly connected to, and are charged to electronic equipment；

A kind of vehicle power supply includes housing（1）Be arranged at housing（1）Internal power-switching circuit plate（2）, the power supply turn Change circuit board（2）Including：Charging control unit（3）, rechargeable cell（4）, inversion unit（5）, under-voltage protection unit （6）, DC power supply output unit（7）With AC power output unit（8）；

The housing（1）Front panel be equipped with solar panels（13）, the housing（1）Right panel be equipped with power switch （9）, USB power source output port（10）With ac power output mouth（11）, the housing（1）Left-Hand Panel be equipped with battery Electricity display lamp（12）；

The solar panels（13）Output terminal pass through charging control unit（3）With rechargeable cell（4）Input terminal phase Even, the rechargeable cell（4）Output terminal and power switch（9）With the inversion unit（5）Input terminal be connected, The rechargeable cell（4）Power detecting end and the under-voltage protection unit（6）Input terminal be connected；The inversion list Member（5）Output terminal respectively with DC power supply output unit（7）Input terminal, AC power output unit（8）Input terminal it is equal It is connected, the DC power supply output unit（7）Output terminal and USB power source output port（10）It is connected, the AC power is defeated Go out unit（8）With ac power output mouth（11）It is connected, the under-voltage protection unit（6）Output terminal and battery capacity show Lamp（12）It is connected；

The power-switching circuit plate（2）It further includes：Positive pole input adapter A1 and power cathode input adapter A2, the shell Body（1）Left-Hand Panel on be additionally provided with positive pole input interface（14）With power cathode input interface（15）, the power supply is just Pole input adapter A1 and power cathode input adapter A2 respectively with inversion unit（5）It is connected, the positive pole input interface （14）It is connected with positive pole input adapter A1, the power cathode input interface（15）With power cathode input adapter A2 phases Even；

The charging control unit（3）Including：First sampling unit（16）, the second sampling unit（17）, CPU processing units （18）, A/D converter（19）, DC/DC converters（20）, diode D1, transistor T1 and capacitance C1；

First sampling unit（16）Input terminal and the solar panels（13）Current signal test side be connected, described One sampling unit（16）Output terminal pass through A/D converter（19）With CPU processing units（18）The first signal input part be connected, The CPU processing units（18）Secondary signal input terminal pass through the second sampling unit（17）With rechargeable cell（4）'s Voltage signal test side is connected, the CPU processing units（18）Control terminal be connected with the source level of transistor T1, the transistor The grid of T1 is connected with the cathode of diode D1, the anode and solar panels of the diode D1（13）Output terminal be connected, institute The drain for stating transistor T1 passes through sequentially connected capacitance C1 and DC/DC converters（20）With rechargeable cell（4）It is defeated Enter end to be connected.