CN201583636U - Power lithium battery capacity detection circuit with multi-channel switching functions - Google Patents

Power lithium battery capacity detection circuit with multi-channel switching functions Download PDF

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Publication number
CN201583636U
CN201583636U CN2009202622901U CN200920262290U CN201583636U CN 201583636 U CN201583636 U CN 201583636U CN 2009202622901 U CN2009202622901 U CN 2009202622901U CN 200920262290 U CN200920262290 U CN 200920262290U CN 201583636 U CN201583636 U CN 201583636U
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China
Prior art keywords
lithium battery
battery
circuit
multichannel
input end
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Expired - Fee Related
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CN2009202622901U
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Chinese (zh)
Inventor
周元瑞
杨月全
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Shenzhen Ltw Electronic Technology Co ltd
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Shenzhen Ltw Electronic Technology Co ltd
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Priority to CN2009202622901U priority Critical patent/CN201583636U/en
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Abstract

The utility model discloses a power lithium battery capacity detection circuit with multi-channel switching functions, which comprises a lithium battery pack, a battery capacity monitor and a data storage device and is characterized by further comprising a one-out-multiple channel switcher and a microprocessor, wherein the lithium battery pack is formed by multiple lithium battery sections in series, an anode of each lithium battery section in the battery pack is connected with an input end of the one-out-multiple channel switcher via a resistor, a cathode of the battery pack is connected to an AD0 input end of a voltage detection circuit of the battery capacity monitor, an output end of the one-out-multiple switcher is earthed and connected with a divider resistor, and is also connected with an AD4 input end of the voltage detection circuit of the battery capacity monitor, and a switching control end of the one-out-multiple channel switcher is connected with an output port of the microprocessor. The power lithium battery capacity detection circuit resolves technical difficult problems that the existing capacity detection circuit can not be expanded to detect more batteries.

Description

Dynamic lithium battery capacity check circuit with multichannel handoff functionality
Technical field
The utility model belongs to lithium battery electric weight detection range, relates to great-capacity power battery capacity check circuit, is applied to fields such as electric bicycle, battery-operated motor cycle, UPS, is specifically related to a kind of dynamic lithium battery capacity check circuit with multichannel handoff functionality.
Background technology
Along with the technology of lithium-ion-power cell is constantly ripe, lithium battery is combined into the electric battery of different voltages and capacity by connection in series-parallel, now can be applicable to fully in the high-power various load.What application was maximum at present is products such as electric bicycle, battery-operated motor cycle, UPS.
Fig. 1 is the utility model prior art circuits figure, and this background technology is the accurate cubic content measurement of lithium battery that was applied to notebook originally, and the joint number of the lithium battery of use is 2 ~ 4 joint series connection, and the capacity check scope is less.
This lithium battery electric weight testing circuit such as Fig. 1, form by devices such as IC1, IC2, RN1, R2~R9, IC1 finishes the voltage detecting of every joint lithium battery B1, B2, B3, B4 by R2~R9, maximum 4 joints, wherein R6 and R2 measure the cell voltage of B1 to the B1 dividing potential drop, the value proportion expression of R2 and R6 is R6=7*R2, and AD1 detects 1/8th the magnitude of voltage of B1; R7 and R3 measure the cell voltage of B2 to the B2 dividing potential drop, and the value proportion expression of R3 and R7 is R7=7*R3, and AD2 detects 1/8th the magnitude of voltage of B2; R8 and R4 measure the cell voltage of B3 to the B3 dividing potential drop, and the value proportion expression of R4 and R8 is R8=15*R4, and AD3 detects 1/16th the magnitude of voltage of B3; R9 and R5 measure the cell voltage of B4 to the B4 dividing potential drop, and the value proportion expression of R5 and R9 is R9=15*R5, and AD4 detects 1/16th the magnitude of voltage of B4; The purpose that detects voltage is that IC1 need judge whether electric core is full of and emptying; IC1 is the BQ2060A model of TI company, and IC2 is used for the relevant information of storage batteries, AT24C02 device commonly used.IC1 detects every batteries voltage can accomplish lithium battery overvoltage, under-voltage protection function.
IC1 can measure the current value that charges into and emit by RN1 simultaneously, and the built-in electric weight metering circuit of IC1 can be accomplished the integration of electric current and time, and the coulomb of finishing lithium battery calculates, thereby the charge value that can accurately measure 4 joint lithium batteries changes.
This electrical measurement circuit can only save lithium batteries by fixation measuring 2 to 4, can not measure the more capacity of the lithium battery group of more piece number.The user the lithium battery group of using this type of more piece number just can not be at any time the capacity information of electrolytic cell, it is very not convenient to cause the user to use.
The utility model content
The utility model wants the technical solution problem to provide a kind of dynamic lithium battery capacity check circuit with multichannel handoff functionality, and this circuit can detect the capacity of multiple batteries, and dirigibility is strong, realizes simple.
The utility model is to solve the problems of the technologies described above the technical scheme that is adopted to be:
A kind of dynamic lithium battery capacity check circuit with multichannel handoff functionality comprises lithium battery group, battery electric quantity monitoring meter and data storage device that multisection lithium battery is composed in series; Described battery electric quantity monitoring meter built-in voltage testing circuit, bidirectional current testing circuit, circuit metering circuit and logic control circuit and communication module; The anodal termination positive source of described lithium battery group is in series with a resistance between the negative pole end of lithium battery group and the power cathode, the two ends of this resistance are also inserted in the bidirectional current testing circuit of battery electric quantity monitoring meter; It is characterized in that, comprise that also a multichannel selects one road switch and microprocessor, corresponding respectively resistance of the positive pole of each the joint lithium battery in the described electric battery and multichannel are selected an input end of one road switch; The positive terminal of each the joint lithium battery in the electric battery inserts the input end that described multichannel is selected one road switch by a resistance, the negative pole end of electric battery is received the AD0 input end of the voltage detecting circuit of battery electric quantity monitoring meter, described multichannel selects the output terminal of one road switch to connect a divider resistance over the ground, and described multichannel selects the output terminal of one road switch also to connect the AD4 input end of the voltage detecting circuit of battery electric quantity monitoring meter; Described multichannel is selected the output port of the switching controls termination microprocessor of one road switch, and described microprocessor and battery electric quantity monitoring meter communicate to connect.
It is 4,8 or 16 that described multichannel is selected one road switch input end; Described microprocessor is single-chip microcomputer or DSP.
The beneficial effects of the utility model:
Core of the present utility model is that the microprocessor control multi-channel switch (being that multichannel is selected one road switch) that adopts switches a plurality of input signals, thereby the electric weight of accurate measurement electric battery, therefore, this circuit has been expanded the electrical measurement function of available circuit greatly.Circuit originally can only detect the electric weight of 2-4 batteries, and this circuit can be supported 15 batteries (selecting one road switch if adopt the multichannel of 16 inputs).Therefore, this circuit has well solved existing electric weight testing circuit and can't expand and detect the more technical barrier of multiple batteries.This circuit also has the strong and realization characteristic of simple of dirigibility.
Description of drawings
Fig. 1 detects the circuit theory diagrams of electric weight for existing electric weight.
Fig. 2 is circuit theory diagrams of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Embodiment 1:
A kind of dynamic lithium battery capacity check circuit with multichannel handoff functionality comprises lithium battery group, battery electric quantity monitoring meter IC1 and data storage device IC2 that multisection lithium battery is composed in series; Described battery electric quantity monitoring meter built-in voltage testing circuit, bidirectional current testing circuit, circuit metering circuit and logic control circuit and communication module; The anodal termination positive source of described lithium battery group is in series with a resistance R N1 between the negative pole end of lithium battery group and the power cathode, the two ends of this resistance are also inserted in the bidirectional current testing circuit of battery electric quantity monitoring meter; It is characterized in that, comprise that also a multichannel selects one road switch and microprocessor, corresponding respectively resistance of the positive pole of each the joint lithium battery in the described electric battery and multichannel are selected an input end of one road switch; The positive terminal of each the joint lithium battery in the electric battery inserts the input end that described multichannel is selected one road switch by a resistance, the negative pole end of electric battery is received the AD0 input end of the voltage detecting circuit of battery electric quantity monitoring meter, described multichannel selects the output terminal of one road switch to meet a divider resistance R0 over the ground, and described multichannel selects the output terminal of one road switch also to connect the AD4 input end of the voltage detecting circuit of battery electric quantity monitoring meter; Described multichannel is selected the output port of the switching controls termination microprocessor of one road switch, and described microprocessor and battery electric quantity monitoring meter communicate to connect.
The positive terminal of the n joint lithium battery in the electric battery is respectively by R1 ~ Rn resistance, insert described multichannel and select n input end of one road switch, the negative pole end of electric battery is received the AD0 input end of IC1, described multichannel selects the output terminal of one road switch to meet a divider resistance R0 over the ground, form bleeder circuit with every road connecting resistance R1 of anode end institute ~ Rn, insert the voltage detecting circuit AD4 input end of battery electric quantity monitoring meter IC1 again; The relational expression of Rn and R0 is: Rn=(n-4) R0, n is the number of battery.
Selecting for use multichannel to select the input end of one road switch in this example is 8, can connect the electric battery with 7 batteries; Described microprocessor is 51 series monolithics; Described microprocessor is connected with the communication ends of battery electric quantity monitoring meter.Be used to notify battery electric quantity monitoring meter the current AD4 end which signal to have received battery electric quantity monitoring meter for.

Claims (2)

1. the dynamic lithium battery capacity check circuit with multichannel handoff functionality comprises lithium battery group, battery electric quantity monitoring meter and data storage device that multisection lithium battery is composed in series; Described battery electric quantity monitoring meter built-in voltage testing circuit, bidirectional current testing circuit, circuit metering circuit and logic control circuit and communication module; The anodal termination positive source of described lithium battery group is in series with a resistance between the negative pole end of lithium battery group and the power cathode, the two ends of this resistance are also inserted in the bidirectional current testing circuit of battery electric quantity monitoring meter; It is characterized in that, comprise that also a multichannel selects one road switch and microprocessor, corresponding respectively resistance of the positive pole of each the joint lithium battery in the described electric battery and multichannel are selected an input end of one road switch; The positive terminal of each the joint lithium battery in the electric battery inserts the input end that described multichannel is selected one road switch by a resistance, the negative pole end of electric battery is received the AD0 input end of the voltage detecting circuit of battery electric quantity monitoring meter, described multichannel selects the output terminal of one road switch to connect a divider resistance (R0) over the ground, and described multichannel selects the output terminal of one road switch also to connect the AD4 input end of the voltage detecting circuit of battery electric quantity monitoring meter; Described multichannel is selected the output port of the switching controls termination microprocessor of one road switch, and described microprocessor and battery electric quantity monitoring meter communicate to connect.
2. the dynamic lithium battery capacity check circuit with multichannel handoff functionality according to claim 1 is characterized in that it is 4,8 or 16 that described multichannel is selected one road switch input end; Described microprocessor is single-chip microcomputer or DSP.
CN2009202622901U 2009-12-31 2009-12-31 Power lithium battery capacity detection circuit with multi-channel switching functions Expired - Fee Related CN201583636U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN2009202622901U CN201583636U (en) 2009-12-31 2009-12-31 Power lithium battery capacity detection circuit with multi-channel switching functions

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102221677A (en) * 2011-05-13 2011-10-19 肇庆理士电源技术有限公司 Method for detecting battery pack capacities and consistency, and equipment thereof
CN103293478A (en) * 2012-02-29 2013-09-11 天宇通讯科技(昆山)有限公司 Battery pack energy metering indicating device of electromobile
CN105676137A (en) * 2016-01-18 2016-06-15 廖德成 High-speed battery voltage scanning circuit
CN107834977A (en) * 2017-11-23 2018-03-23 湖南红太阳新能源科技有限公司 A kind of photovoltaic module intelligent wiring box and its control method
CN108627772A (en) * 2018-05-04 2018-10-09 安徽朗越能源股份有限公司 A kind of lithium battery grouping output voltage method for rapidly testing

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102221677A (en) * 2011-05-13 2011-10-19 肇庆理士电源技术有限公司 Method for detecting battery pack capacities and consistency, and equipment thereof
CN103293478A (en) * 2012-02-29 2013-09-11 天宇通讯科技(昆山)有限公司 Battery pack energy metering indicating device of electromobile
CN105676137A (en) * 2016-01-18 2016-06-15 廖德成 High-speed battery voltage scanning circuit
CN105676137B (en) * 2016-01-18 2019-04-02 廖德成 A kind of high speed cell voltage scanning circuit
CN107834977A (en) * 2017-11-23 2018-03-23 湖南红太阳新能源科技有限公司 A kind of photovoltaic module intelligent wiring box and its control method
CN108627772A (en) * 2018-05-04 2018-10-09 安徽朗越能源股份有限公司 A kind of lithium battery grouping output voltage method for rapidly testing

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Granted publication date: 20100915

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Addressee: Shenzhen LTW Electronic Technology Co., Ltd.

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