CN201130906Y

CN201130906Y - Power supply self-adapting apparatus of accumulator on-line monitoring terminal

Info

Publication number: CN201130906Y
Application number: CNU2007200091190U
Authority: CN
Inventors: 李汪彪; 吴允平; 蔡声镇; 苏伟达; 吴进营; 卢宇; 陈聪慧
Original assignee: Fujian Normal University
Current assignee: Fujian Normal University
Priority date: 2007-12-17
Filing date: 2007-12-17
Publication date: 2008-10-08
Anticipated expiration: 2017-12-17

Abstract

The utility model relates to a self adaptive power supply converter, in particular to a power supply self adaptive device of the online monitoring terminal for a battery. The utility model is characterized in that the converter comprises an power supply input, a voltage detector, an electronic switch, a DC/DC booster circuit, a diode, a low voltage difference power voltage regulator, and a main circuit, wherein the power supply input, the electronic switch, the DC/DC booster circuit, the main diode, an LDO and the main circuit are connected in series to form a main through circuit; the power supply is connected with the LDO via a bypass diode to form a parallel bypass; the power supply is connected with the electronic switch via the voltage detector to construct a detection circuit. When the input voltage is lower than the threshold voltage, the DC/DC booster circuit works, the bypass diode is cut-off, the main through circuit diode is through, the input voltage is supplied to the main circuit after voltage-stabilizing of the LDO. The self adaptive power supply converter has the advantages of enabling the battery monitoring module to be adaptive to all batteries, improving the versatility of the monitoring system, and meeting the specific requirement of monitoring the different rated voltage batteries.

Description

A kind of supply self adaptation device of storage battery on-line monitoring terminal

Technical field

The utility model relates to a kind of adaptive power supply change-over device, more particularly relates to a kind of storage battery on-line monitoring system---the supply self adaptation device of monitoring terminal.

Background technology

Storage battery is a kind ofly electric energy can be converted into chemical energy and store, and chemical energy is changed into the power supply of electric energy during use again.Usually; it be a kind ofly power conveniently, safe and reliable DC power supply; be widely used in all kinds of electronic equipment system; it is the important component part of system; the accumulator property index directly affects the reliability (sometimes, often much bigger more than the value of system own because of the loss of its accident that causes or shutdown) of system.Because storage battery is a kind of chemical reaction equipment, its inner chemical reaction generally is difficult in time discovering, and the defective in the daily use can not come out by immediate response yet, so the maintenance work of storage battery is most important.

In order to ensure the reliably working of storage battery, present common practices is that storage battery is carried out on-line monitoring, obtains its operational factor such as battery real-time voltage, capacity etc., judges the quality of battery with this.Storage battery on-line monitoring terminal mainly realizes the isoparametric on-line monitoring of battery tension, in actual the use, this type systematic often all is by monitored direct battery power, therefore, the power-supply system of this terminal not only should have the voltage adaptation scope of broad, and power consumption should be low as much as possible.In actual applications, storage battery commonly used has three kinds of 2V, 6V and 12V, and the microcontroller operating voltage of accumulator monitoring terminal is generally 5V or 3.3V, way relatively more commonly used at present is exactly the battery at different rated voltages, design different power modules and change needs with adaptive system, promptly the monitoring terminal of the monitoring terminal of 2V battery and 12V can not be general.Therefore, the power adaptation that how to improve storage battery on-line monitoring terminal is the focus and research difficult point of this type systematic always.

Summary of the invention

The purpose of this utility model is to overcome above-mentioned shortcoming, satisfy the needs that this part increases day by day, the invention provides a kind of employing DC-DC boosts and the LDO reduction voltage circuit, and the work that utilizes voltage checking chip control booster circuit whether, utilize diode selecting output higher voltage, make storage battery on-line monitoring module can adapt to the needs of the battery of the different rated voltages of 2V～12V automatically, improved the compatibility of power supply.

For achieving the above object, technology path of the present utility model is: device is made of power input, voltage detector, electronic switch, DC-DC booster circuit, diode, low pressure reduction power regulator (LDO) and main circuit.Power input and electronic switch, DC-DC booster circuit, primary path diode, LDO and main circuit link to each other successively and constitute primary path, and power supply is used for the height of detection system input voltage by the formation testing circuit that links to each other with electronic switch behind the voltage detector; Power supply constitutes bypass in parallel after linking to each other with LDO by bypass diode.After device starts, voltage detector is finished the detection of system's input supply voltage, when input voltage is lower than the threshold voltage of voltage detector, the electronic switch conducting, the work of DC-DC booster circuit, this moment is because the voltage of DC-DC booster circuit output is higher than power input voltage, bypass diode ends, the primary path diode current flow makes the input voltage of LDO be higher than the supply power voltage of main circuit, through offering the main circuit power supply after the LDO voltage stabilizing.

After adopting technical solutions of the utility model, can make the accumulator monitoring module adaptive, improve the versatility of monitoring system, satisfy the real needs of different rated voltage battery cell monitorings in all storage batterys.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 is a supply self adaptation apparatus structure block diagram described in the utility model.

Fig. 2 is the circuit diagram of embodiment in the supply self adaptation device described in the utility model.

In Fig. 1, the 1st, power input, its voltage range is between 2～12V; The 2nd, the bypass diode in the bypass in parallel is Schottky diode; The 3rd, low pressure reduction power regulator LDO; The 4th, be the main circuit of accumulator monitoring data acquisition; The 5th, the primary path diode is Schottky diode; The 6th, the DC-DC booster circuit; The 7th, can be by the electronic switch of big electric current; The 8th, voltage detector.

Fig. 2 is the physical circuit figure according to supply self adaptation apparatus structure block diagram design described in the utility model.

Embodiment

For the utility model there being further understanding, the utility model is further specified below in conjunction with drawings and Examples.

According to the structure among Fig. 1, connect according to the design circuit of Fig. 2.Wherein, the PIN2 of the electrode input end of BT9 and voltage checking chip U9, the source electrode of P-channel field-effect transistor (PEFT) pipe Q9, diode D9 link to each other; The PIN3 end ground connection of U9, its output pin PIN1 OUT is connected to the grid of Q9; The drain electrode output of Q9 links to each other with the positive pole of inductance L 1, capacitor C 9, and the negative pole end of capacitor C 9 connects ground, and the other end of inductance L 1 is connected with the PIN7 LX pin of DC-DC booster circuit main control chip U10; The PIN6 end ground connection of U10, the PIN1 end of U10 connects some resistance R 9, R10, and the other end of PIN8 output and resistance R 10, the positive pole of capacitor C 10, diode D10 link to each other; The input PIN2 of U11 LDO links to each other with the positive pole of capacitor C 11 with diode D9, D10 respectively, other one section ground connection of C11, and the PIN1 of U11 links to each other with ground, and the PIN3 output voltage links to each other with capacitor C 12, other one section ground connection of C12.

After device connected, the threshold value of setting voltage detector was 6V.After the startup, voltage detector 8 is finished the detection of system's input power supply 1 voltage.

When input voltage only is 2V, electronic switch 7 conductings, 6 work of DC-DC booster circuit, this moment is because the voltage of DC-DC booster circuit 6 outputs is higher than power input voltage, so bypass diode 2 ends, 5 conductings of primary path diode make the input voltage of LDO 3 be higher than the supply power voltage of main circuit 4, through offering main circuit 4 power supplies after LDO 3 voltage stabilizings.

When input voltage is 6V when above, electronic switch 7 disconnects, and DC-DC booster circuit 6 is not worked, import this moment power supply by bypass diode 2 directly to LDO 3 power supplies, finish voltage stabilizing output by it, give main circuit 4 power supplies.

Claims

1, a kind of supply self adaptation device of storage battery on-line monitoring terminal, it is characterized in that device is made of power input, voltage detector, electronic switch, DC-DC booster circuit, diode, low pressure reduction power regulator (LDO) and main circuit, wherein power input, electronic switch, DC-DC booster circuit, primary path diode, LDO and main circuit link to each other successively and constitute primary path, power supply constitutes bypass in parallel by the bypass diode back that links to each other with LDO, and power supply is by the formation testing circuit that links to each other with electronic switch behind the voltage detector.