Constant-current and constant-voltage circuit for standby power supply of vehicle-mounted DVR (discharge voltage regulator) equipment lead-acid storage battery
A technology of lead-acid battery and backup power supply, which is applied in battery circuit devices, circuit devices, and efficient vehicle charging, etc., and can solve problems such as damaged batteries, shortened battery life, and accidents
Inactive Publication Date: 2014-01-29
深圳前海威康普技术有限公司
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Problems solved by technology
Improper charging and discharging methods will shorten battery life, even damage the battery and cause accidents
Method used
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[0023] This embodiment is a preferred implementation mode of the present invention, and other principles and basic structures that are the same or similar to this embodiment are within the protection scope of the present invention.
[0024] Please refer to the attached figure 1 To attach Figure 8 , the lead-acid battery backup power supply circuit of the vehicle-mounted DVR equipment of the present invention, it comprises backup battery interface module 1, step-up switch regulator module 2, constant current and constant voltage charging module 3, the lead-acid storage battery module 4 of backup power supply, battery discharge switch Module 5, logic control circuit 3.3V power supply module 6, input voltage and battery voltage detection module 7 and microprocessor module 8, the lead-acid storage battery module 4 of described backup power supply accepts the charging current of constant current constant voltage charging module 3, when When the main power supply of the vehicle-mo...
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The invention relates to a constant-current and constant-voltage circuit for a standby power supply of a vehicle-mounted DVR (discharge voltage regulator) equipment lead-acid storage battery. An interface module of a standby battery is connected with a boost switch voltage regulating module, a battery discharging switch module, a logic control circuit 3.3 V power supply module and a micro processor module respectively; the boost switch voltage regulating module outputs to a constant-current and constant-voltage charging module; the constant-current and constant-voltage charging module outputs to charge a lead-acid storage battery module of the standby power supply; the lead-acid storage battery module of the standby power supply is charged, is connected with a standby battery interface module through a battery discharging switch module and outputs power source to the logic control circuit 3.3 V power supply module to supply power to the micro processor module; an input voltage and battery voltage detection module outputs detection signals to the micro processor module; and the micro processor module controls other modules to work. The constant-current and constant-voltage circuit meets the technical requirements of charging and discharging the lead-acid storage battery and can confirm to the standby power supply of the lead-acid storage battery with the characteristics of fast charging and discharging the standby power supply of the vehicle-mounted DVR equipment.
Description
technical field [0001] The invention discloses a charging and discharging technical scheme of a power supply circuit, in particular to a constant current and constant voltage circuit for a backup power supply of a lead-acid storage battery for vehicle-mounted DVR equipment. Background technique [0002] Nowadays, car DVR devices on the market seldom have a backup power supply. When many traffic accidents occur, the power supply of the car itself stops supplying power, causing the DVR device to fail to record the entire process of the traffic accident. Because of the lack of these valuable video data, it is not conducive to investigating the cause of the accident. For this reason, people have invented a kind of backup power supply that is suitable for vehicle-mounted DVR equipment, when car power supply is unstable, or when power failure, switch to backup power supply to ensure the integrity of video data. It can also meet the video recording needs of a set period of...
Claims
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IPC IPC(8): H02J7/00B60L11/18
CPCY02T10/7016Y02T10/92Y02T10/70
Inventor 高兴军雷志军
Owner 深圳前海威康普技术有限公司