CN1979942A - Display circuit for residual electricity quantity of secondary cell - Google Patents

Display circuit for residual electricity quantity of secondary cell Download PDF

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Publication number
CN1979942A
CN1979942A CN 200510022232 CN200510022232A CN1979942A CN 1979942 A CN1979942 A CN 1979942A CN 200510022232 CN200510022232 CN 200510022232 CN 200510022232 A CN200510022232 A CN 200510022232A CN 1979942 A CN1979942 A CN 1979942A
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CN
China
Prior art keywords
voltage
cell
dump energy
comparator
output
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Application number
CN 200510022232
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Chinese (zh)
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CN100541904C (en
Inventor
张子生
罗康峰
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比亚迪股份有限公司
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Priority to CN 200510022232 priority Critical patent/CN100541904C/en
Publication of CN1979942A publication Critical patent/CN1979942A/en
Application granted granted Critical
Publication of CN100541904C publication Critical patent/CN100541904C/en

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    • Y02E60/12

Abstract

Circuit for displaying remainder electric quantity includes at least two routes of multiplexing voltage comparator, and reference voltage source. The comparator is connected to inverted input end, and output end of secondary battery. The reference voltage source provides comparing reference voltage for co-phased input end of each route of the comparator. Generation circuit for reference voltage generates number of reference voltage, which is equal to number of route of comparator. Comparing reference voltage value is determined by voltage output from battery as well as relation curve corresponding to remainder electric quantity of battery. Each comparing reference voltage is setup according to descending scale. Output end of comparator is connected to luminous display device, and number of luminous display device is direct proportional to remainder electric quantity of battery. Features are: low cost, capable of displaying percentage of total electric quantity etc.

Description

A kind of dump energy display circuit of secondary cell

Technical field

The present invention relates to secondary cell, especially relate to a kind of dump energy display circuit of secondary cell.

Background technology

Existing show that the circuit of secondary cell dump energy all is to be integrated in the power management chip, for those batteries that only need to show roughly dump energy, the display circuit of employing is too complicated, certainly will meaningless increase manufacturing cost.

Summary of the invention

Technical problem to be solved by this invention is to remedy the deficiencies in the prior art, proposes the dump energy display circuit of secondary cell that a kind of dump energy that can show secondary cell flexibly, simply accounts for the percentage of total electric weight.

Technical problem of the present invention is solved like this:

The characteristics of the dump energy display circuit of this secondary cell are:

What be provided with that its inverting input is connected with the output of secondary cell is at least two tunnel plurality of voltages comparator and the reference voltage source that benchmark voltage is provided respectively for the in-phase input end of every road voltage comparator;

Described reference voltage generating circuit produces the benchmark voltage with plurality of voltages comparator equal number, described benchmark magnitude of voltage, corresponding relation curve by secondary cell output voltage and battery dump energy is determined, and each benchmark magnitude of voltage successively decreases by preset proportion;

The output of described plurality of voltages comparator is connected with the corresponding light-emitting display device that shows the secondary cell dump energy respectively, luminous light-emitting display device quantity and secondary cell dump energy are in direct ratio, can show that the dump energy of secondary cell accounts for the percentage of total electric weight, promptly show the dump energy of secondary cell roughly.The output voltage of the dump energy correspondence of secondary cell exports one road voltage comparator to the benchmark magnitude of voltage that is lower than it, the output output low level of this road voltage comparator, the light-emitting display device of secondary cell dump energy that is connected its output is luminous, the output voltage of the dump energy correspondence of secondary cell exports one road voltage comparator to the benchmark magnitude of voltage that is higher than it, the output of this road voltage comparator output high level, the light-emitting display device of secondary cell dump energy that is connected its output is not luminous.

Technical problem of the present invention is to solve according to qualifications like this:

Described reference voltage source includes revises the reference voltage generating circuit of adjusting output valve.

Described two tunnel the plurality of voltages comparator of being at least is four road voltage comparators, four benchmark magnitudes of voltage that reference voltage generating circuit produces successively decrease by preset proportion, and to account for the percentage of total electric weight be 80%, 60%, 40% and 20% to the dump energy of corresponding secondary cell respectively.

Described four road voltage comparators are that the employing model is four road voltage comparators of the four voltage comparator production of integrated circuits of F139, F239 or F339.

Technical problem of the present invention is further to solve like this:

Described serial adjustable resistance and the fixed resistance of adjusting resistance by stepping by the reference voltage generating circuit of revising the adjustment output valve formed the multistage voltage divider that is at least secondary, the output of every grade of voltage divider is connected to the in-phase input end of one road voltage comparator respectively, and the voltage of being exported is the benchmark voltage of this road voltage comparator.

Serial adjustable resistance and fixed resistance that resistance is adjusted in described stepping are proportion resistor.

The light-emitting display device of described secondary cell dump energy is a light-emitting diode, and its negative electrode is connected to the output of one road voltage comparator, and anode is connected to the positive direct-current power end of voltage comparator through dropping resistor.

The dc power supply terminal of described plurality of voltages comparator is provided with the dump energy display switch.When described dump energy display switch is closed, just show the dump energy of secondary cell, to reduce the electric quantity consumption of secondary cell.

The present invention is novel, and circuit is simple, and is with low cost, easy to use.The present invention is according to the corresponding relation curve and the actual instructions for use of secondary cell output voltage and battery dump energy, preestablish the benchmark voltage and the benchmark magnitude of voltage of some, respectively each benchmark voltage is inputed to the in-phase input end of each voltage comparator of equal number, the secondary cell output voltage is inputed to the inverting input of each voltage comparator, compare with the benchmark magnitude of voltage of setting, it is flexible to drive corresponding dump energy light-emitting display device by the output of voltage comparator, show that simply the dump energy of secondary cell accounts for the percentage of total electric weight.Also by the dump energy display switch is set, the use of control circuit of the present invention is to reduce the electric quantity consumption of secondary cell.

Description of drawings

Below the contrast accompanying drawing and in conjunction with embodiment the present invention is further illustrated.

Accompanying drawing is the electrical schematic diagram of an embodiment of the present invention.

Embodiment

A kind of lithium ion battery the dump energy display circuit

Dump energy display circuit as shown in drawings, be provided with four tunnel voltage comparator B, 1~B4 that its inverting input is connected with the output of lithium ion battery E, and for the in-phase input end of every road voltage comparator B 1~B4 provides the 5V reference voltage source Vref of benchmark voltage respectively, it is the four voltage comparator production of integrated circuits of F139 that described four tunnel voltage comparator B, 1~B4 adopts model.

Described reference voltage source Vref includes and revises the reference voltage generating circuit of adjusting output valve.This generation circuit is adjusted the adjustable resistance RV of resistance and the level Four voltage divider that fixed resistance R0, R1~R6 form by stepping, produces four benchmark voltage Vref1~Vref4 with four road voltage comparator equal numbers.Described benchmark magnitude of voltage determined by the corresponding relation curve of lithium ion battery output voltage and battery dump energy, and each benchmark magnitude of voltage successively decreases by preset proportion.Revise the resistance value of adjusting adjustable resistance RV and fixed resistance R1~R6, make benchmark magnitude of voltage Vref1~Vref4 be respectively 4.11V, 3.94V, 3.67V and 3.42V, the percentage that its pairing lithium ion battery dump energy accounts for total electric weight respectively is 80%, 60%, 40% and 20%

The output of four tunnel voltage comparator B, 1~B4 is connected with the corresponding LED 1~LED4 that shows the lithium ion dump energy respectively, the negative electrode of LED 1~LED4 is connected to the B1~B4 output of voltage comparator respectively, and anode is connected to the positive direct-current power end VCC of voltage comparator B 1~B4 respectively through dropping resistor R7~R10.The output voltage of the dump energy correspondence of lithium ion battery E exports one road voltage comparator to the benchmark magnitude of voltage that is lower than it, the output output low level of this road voltage comparator, be connected the lumination of light emitting diode of its output, the output voltage of the dump energy correspondence of lithium ion battery E exports one road voltage comparator to the benchmark magnitude of voltage that is higher than it, the output output high level of this road voltage comparator, the light-emitting diode that is connected its output is not luminous.Luminous light-emitting diode quantity and the dump energy of lithium ion battery E are in direct ratio, can show that the dump energy of lithium ion battery E accounts for the percentage of total electric weight.

The dc power supply terminal VCC of four tunnel voltage comparator B, 1~B4 is provided with dump energy display switch SW.When dump energy display switch SW was closed, four tunnel voltage comparator B, 1~B4 the DC power supply that is provided by 5V reference voltage source Vref just was provided and is worked, and showed the dump energy of lithium ion battery E, to reduce the electric quantity consumption of lithium ion battery E.

Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to the scope of patent protection that the present invention is determined by claims of being submitted to.

Claims (8)

1. the dump energy display circuit of a secondary cell is characterized in that:
What be provided with that its inverting input is connected with the output of secondary cell is at least two tunnel plurality of voltages comparator and the reference voltage source that benchmark voltage is provided respectively for the in-phase input end of every road voltage comparator;
Described reference voltage generating circuit produces the benchmark voltage with plurality of voltages comparator equal number, described benchmark magnitude of voltage, corresponding relation curve by secondary cell output voltage and battery dump energy is determined, and each benchmark magnitude of voltage successively decreases by preset proportion;
The output of described plurality of voltages comparator is connected with the corresponding light-emitting display device that shows the secondary cell dump energy respectively, and luminous light-emitting display device quantity and secondary cell dump energy are in direct ratio.
2. the dump energy display circuit of secondary cell as claimed in claim 1 is characterized in that:
Described reference voltage source includes revises the reference voltage generating circuit of adjusting output valve.
3. the dump energy display circuit of secondary cell as claimed in claim 1 or 2 is characterized in that:
Described serial adjustable resistance and the fixed resistance of adjusting resistance by stepping by the reference voltage generating circuit of revising the adjustment output valve formed the multistage voltage divider that is at least secondary, the output of every grade of voltage divider is connected to the in-phase input end of one road voltage comparator respectively, and the voltage of being exported is the benchmark voltage of this road voltage comparator.
4. the dump energy display circuit of secondary cell as claimed in claim 3 is characterized in that:
Serial adjustable resistance and fixed resistance that resistance is adjusted in described stepping are proportion resistor.
5. the dump energy display circuit of secondary cell as claimed in claim 4 is characterized in that:
Described two tunnel the plurality of voltages comparator of being at least is four road voltage comparators, four benchmark magnitudes of voltage that reference voltage generating circuit produces successively decrease by preset proportion, and to account for the percentage of total electric weight be 80%, 60%, 40% and 20% to the dump energy of corresponding secondary cell respectively.
6. the dump energy display circuit of secondary cell as claimed in claim 5 is characterized in that:
Described four road voltage comparators are that the employing model is four road voltage comparators of the four voltage comparator production of integrated circuits of F139, F239 or F339.
7. the dump energy display circuit of secondary cell as claimed in claim 6, it is characterized in that: the light-emitting display device of described secondary cell dump energy is a light-emitting diode, its negative electrode is connected to the output of one road voltage comparator, and anode is connected to the positive direct-current power end of voltage comparator through dropping resistor.
8. the dump energy display circuit of secondary cell as claimed in claim 7 is characterized in that:
The dc power supply terminal of described plurality of voltages comparator is provided with the dump energy display switch, when described dump energy display switch is closed, just shows the dump energy of secondary cell.
CN 200510022232 2005-11-30 2005-11-30 A kind of dump energy display circuit of secondary cell CN100541904C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200510022232 CN100541904C (en) 2005-11-30 2005-11-30 A kind of dump energy display circuit of secondary cell

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200510022232 CN100541904C (en) 2005-11-30 2005-11-30 A kind of dump energy display circuit of secondary cell

Publications (2)

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CN1979942A true CN1979942A (en) 2007-06-13
CN100541904C CN100541904C (en) 2009-09-16

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102403549A (en) * 2011-10-18 2012-04-04 芜湖市神龙新能源科技有限公司 Lead-acid battery capacity restorer
CN101546917B (en) * 2008-03-28 2013-03-27 北京华旗资讯数码科技有限公司 Composite solar battery charger for displaying power supplying efficiency in real time
CN103066646A (en) * 2012-12-14 2013-04-24 浙江明烁电子科技有限公司 Electric quantity indicating circuit of storage battery
CN103176132A (en) * 2011-12-22 2013-06-26 联芯科技有限公司 Estimation method and terminal device of electricity quantity of battery
CN103178309A (en) * 2013-03-22 2013-06-26 苏州能斯特新能源有限公司 Residual electric quantity display device suitable for lithium iron phosphate battery
CN103364620A (en) * 2012-03-27 2013-10-23 海洋王照明科技股份有限公司 Power monitoring circuit and equipment
CN103439662A (en) * 2013-08-16 2013-12-11 崧顺电子(深圳)有限公司 Low-cost battery electricity quantity detection circuit
CN104133179A (en) * 2014-07-22 2014-11-05 东北林业大学 Battery capacity detection and classification device
CN104833927A (en) * 2015-05-15 2015-08-12 惠州Tcl移动通信有限公司 Battery capacity display method, system thereof and mobile terminal
CN105790385A (en) * 2016-05-10 2016-07-20 南通钰泰电子科技有限公司 Circuit for setting display range of electric quantity of battery through pin multiplexing
WO2017215341A1 (en) * 2016-06-16 2017-12-21 深圳市鼎盛智能科技有限公司 Detection apparatus for electric quantity of battery and mobile electronic device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6522361B2 (en) * 1996-03-08 2003-02-18 Sony Corporation Electronic apparatus having the function of displaying the battery residual quantity and method for displaying the battery residual quantity
CN2598158Y (en) * 2003-01-27 2004-01-07 国营建中化工总公司 Lithium primary battery with residual capacity display device
CN2687927Y (en) * 2003-09-11 2005-03-23 东风汽车公司 Intelligent charging and surplus electrical measuring device for electric motor car
CN1700508A (en) * 2004-05-20 2005-11-23 全友电脑股份有限公司 Charging battery with electricity quantity display

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101546917B (en) * 2008-03-28 2013-03-27 北京华旗资讯数码科技有限公司 Composite solar battery charger for displaying power supplying efficiency in real time
CN102403549B (en) * 2011-10-18 2014-07-30 芜湖市神龙新能源科技有限公司 Lead-acid battery capacity restorer
CN102403549A (en) * 2011-10-18 2012-04-04 芜湖市神龙新能源科技有限公司 Lead-acid battery capacity restorer
CN103176132A (en) * 2011-12-22 2013-06-26 联芯科技有限公司 Estimation method and terminal device of electricity quantity of battery
CN103176132B (en) * 2011-12-22 2015-08-12 联芯科技有限公司 The evaluation method of battery electric quantity and terminal device
CN103364620A (en) * 2012-03-27 2013-10-23 海洋王照明科技股份有限公司 Power monitoring circuit and equipment
CN103066646A (en) * 2012-12-14 2013-04-24 浙江明烁电子科技有限公司 Electric quantity indicating circuit of storage battery
CN103178309A (en) * 2013-03-22 2013-06-26 苏州能斯特新能源有限公司 Residual electric quantity display device suitable for lithium iron phosphate battery
CN103178309B (en) * 2013-03-22 2015-10-14 阿特斯(中国)投资有限公司 A kind of dump energy display unit being applicable to ferric phosphate lithium cell
CN103439662A (en) * 2013-08-16 2013-12-11 崧顺电子(深圳)有限公司 Low-cost battery electricity quantity detection circuit
CN104133179A (en) * 2014-07-22 2014-11-05 东北林业大学 Battery capacity detection and classification device
CN104833927A (en) * 2015-05-15 2015-08-12 惠州Tcl移动通信有限公司 Battery capacity display method, system thereof and mobile terminal
CN104833927B (en) * 2015-05-15 2017-12-12 惠州Tcl移动通信有限公司 A kind of display methods of battery electric quantity, system and mobile terminal
CN105790385A (en) * 2016-05-10 2016-07-20 南通钰泰电子科技有限公司 Circuit for setting display range of electric quantity of battery through pin multiplexing
WO2017215341A1 (en) * 2016-06-16 2017-12-21 深圳市鼎盛智能科技有限公司 Detection apparatus for electric quantity of battery and mobile electronic device

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