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Analog double-cell management method and circuit thereof

A technology for managing circuits and dual batteries, applied in battery circuit devices, circuit devices, terminal battery switching devices, etc., can solve the problems of long switching time and low rated current, and achieve the effect of short response time and large rated current

Active Publication Date: 2013-04-03
CHENGDU JIUZHOU ELECTRONIC INFORMATION SYSTEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of long switching time and small rated current in existing digital management circuits in dual-battery (multi-battery) powered handheld and / or mobile electronic devices, and proposes an analog dual-battery Management method and corresponding management circuit

Method used

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  • Analog double-cell management method and circuit thereof

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Embodiment 1

[0024] figure 1 Shown is a specific embodiment of the present invention: the analog dual battery management circuit shown includes two power supply modules and an output terminal J4, and the management circuit also includes a selection and control unit, two feedback units and an isolation unit;

[0025] Among them, the power supply module includes an input terminal (J2 or J3), an output terminal and a control terminal. The input terminal (J2 or J3) is connected to the battery; the selection and control unit includes two input terminals and two output terminals, two output terminals and two output terminals. The control terminals of each power supply module are connected in one-to-one correspondence; the feedback unit includes an input terminal and a feedback terminal, the input terminal is connected with the output terminal of the power supply module, and the feedback terminal of each feedback unit is connected with each input terminal of the selection and control unit in a one-to-...

Embodiment 2

[0030] figure 2 Shown is another specific embodiment of the present invention. In this embodiment, the power supply module includes a switch unit, a reference source unit, a monitoring unit, and a threshold control unit.

[0031] Among them, the switch unit is realized by a MOS tube, which can be a PMOS tube such as AO3407, and the switch unit also includes a bias resistor R4.

[0032] The reference source unit is a reference power supply with a reference voltage comparison terminal (reference source unit input terminal) and two switch terminals, which can be turned on and off according to the voltage value input to the reference voltage comparison terminal and the comparison state of the reference voltage The reference source unit U1 (or U2) can be, for example, a three-terminal reference source TL431, and its reference voltage is 2.5V.

[0033] The monitoring unit is two series sampling resistors (R1 / R2 or R9 / R10 in this implementation) connected between the input terminal of the ...

Embodiment 3

[0061] In the circuit shown in embodiment 2, other components remain unchanged, only the MOS transistor Q 3 , Q 4 And Q 5 Replace it with an ordinary triode, such as an NPN type triode, through the Q 3 , Q 4 And Q 5 The above-mentioned replacement can further shorten the circuit response time and enhance the driving capability of the circuit.

[0062] The advantage of using the analog dual battery management circuit of the present invention is that, compared with the traditional single battery power supply management and digital circuit dual battery power supply management, the new analog circuit dual battery management method completes the two batteries through the analog circuit Management, complete the equipment's battery power supply switch and equipment work process battery replacement, so that electrical equipment can have a longer continuous working capacity, with higher reliability and lower cost. And because the management circuit of the present invention does not make th...

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Abstract

The invention provides an analog double-cell management method and a corresponding management circuit. The management circuit comprises a plurality of power supply modules, an output end, a selective control unit, a plurality of feedback units and an isolation unit, wherein each power supply module comprises an input end, an output end and a control end, and the input end is connected with cells; and the power supply modules, the selective control unit, the plurality of the feedback units and the isolation unit are achieved through analog circuits. The analog double-cell management method and the circuit thereof have the advantages that selection management of power supply of two cells in double-cell power supply equipment is achieved through the analog circuits, compared with the existing double-cell management technology achieved by digital circuits, response time is shorter, the rated current is larger, and the application of double-cell power supply equipment which has high requirement for response time and / or control current becomes possible.

Description

Technical field [0001] The invention relates to a battery management circuit, in particular to a dual battery management circuit designed through an analog circuit. Background technique [0002] At present, the endurance (battery power supply capability) of handheld and / or mobile electronic devices is a short-board technology in most products, and technologies to improve the endurance of handheld and / or mobile electronic devices are highly valued. In the market, most of these electronic devices are powered and managed by a single battery. In order to improve the battery life and extend the use time of the equipment, different manufacturers have adopted different methods: some manufacturers extend the use time by increasing the battery capacity (replacement of large-capacity batteries), but due to technical problems with large-capacity batteries, The increase in battery capacity is still limited, and the use time still cannot meet the requirements in some cases where battery life...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H02J7/36H02J9/04
Inventor 王基石高凯丁捷杨阳刘玲玲阚能华
Owner CHENGDU JIUZHOU ELECTRONIC INFORMATION SYSTEM CO LTD
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