CN201623235U - Charging state equalizing circuit of power lithium ion batteries - Google Patents
Charging state equalizing circuit of power lithium ion batteries Download PDFInfo
- Publication number
- CN201623235U CN201623235U CN2009202902086U CN200920290208U CN201623235U CN 201623235 U CN201623235 U CN 201623235U CN 2009202902086 U CN2009202902086 U CN 2009202902086U CN 200920290208 U CN200920290208 U CN 200920290208U CN 201623235 U CN201623235 U CN 201623235U
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- battery
- self discharge
- equalizing circuit
- self
- lithium ion
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The utility model discloses a charging state equalizing circuit of power lithium ion batteries, comprising a battery protection IC unit and a self-discharge subcircuit, wherein the battery protection IC unit comprises battery protection IC chips arranged at a positive pole and a negative pole of each single battery of a series connection battery pack; the self-discharge subcircuit is respectively positioned at the two ends of the positive pole and the negative pole of each single battery of the series connection battery pack; each self-discharge subcircuit comprises a self-discharge control switch and a shunt resistor which correspond to the same single battery; and electric quantity balanced control output terminals of the battery protection IC chips are connected with control ends of the self-discharge control switches. The charging state equalizing circuit of the power lithium ion batteries can solve the problems that when the plurality of lithium ion batteries are connected in series and charged, the charge retention capability of the battery pack is influenced by the performance difference among the battery single bodies, and the whole performance of the battery pack is reduced.
Description
Technical field
The utility model relates to a kind of charged state equalizing circuit of power lithium-ion battery.
Background technology
Li-Ion rechargeable battery is since early 1990s formal practicability, and in less than the time in 20 years, capacity increases fast, and market increases rapidly.Just expanding to fields such as motor vehicle and environmental protection electric power storage now from the portable product purposes.
Power lithium-ion battery also is in the initial stage developing stage, and each sport technique segment of battery is still waiting perfect, battery management system exploitation or weak link.Along with the use of battery in fields such as electric automobiles, people are more and more higher to the requirement of battery capacity, and battery capacity is big more, can concentrate the energy of release big more, so risk factor are higher.Therefore energy density is big more, and safety measure is just important more.Also must be up to standard aspect this important and indispensable key element of fail safe.When improving energy capacity, exploitation safety measure correspondingly is most important.
When lithium ion battery uses as electrokinetic cell, when for example using, often need that 7-13 is saved the lithium ion battery series connection and use, to reach the needed voltage of motor with its driving battery as electric bicycle.Because each monomer of lithium ion battery can not be in full accord on performance index, in use because the difference of capacity, self discharge between each monomer etc., accumulate over a long period, in use for some time, the retention of charge of battery pack obviously reduces, and influenced lithium ion battery applying in a wider context.Therefore, when the multiple batteries series connection was used, the quality of its performance not only depended on the quality of battery cell quality, the prior height that depends on its total quality.
Summary of the invention
Technical problem to be solved in the utility model is: the charged state equalizing circuit that a kind of power lithium-ion battery is provided, to solve when the multi-section lithium ion battery serial connection charge, because the performance difference between each battery cell influences the retention of charge of battery pack, the problem of reduction battery pack overall performance.
For solving the problems of the technologies described above, the technical solution of the utility model is: the charged state equalizing circuit of power lithium-ion battery, comprise: the battery protection ic unit, described battery protection ic unit comprises the battery protection ic chip of each the single battery positive and negative end that is arranged on series battery; Be arranged at the self discharge branch road of each single battery positive and negative end of described series battery; described self discharge branch road comprises a self discharge control switch and a shunt resistance; corresponding to same joint single battery, the balanced control of the electric weight of described battery protection ic chip is connected with the control end of described self discharge control switch with lead-out terminal.
As a kind of optimized technical scheme, described self discharge control switch comprises a self discharge metal-oxide-semiconductor.
As a kind of optimized technical scheme, the model of described battery protection ic chip is S-8209.
After having adopted technique scheme; the beneficial effects of the utility model are: in the series battery charge process; the battery protection ic chip that is connected in each single battery positive and negative end detects the charging voltage of each single battery; when the voltage that detects any batteries 〉=electric quantity balancing detects voltage (VBU); then the balanced control of the electric weight of its corresponding battery protection ic chip is exported control signal with lead-out terminal; make the conducting of connected self discharge control switch; begin discharge by the self discharge branch road; at this moment; if being lower than electric quantity balancing, the voltage of other battery detects voltage (VBU); then compare with the charging rate of other battery; it is steady relatively that the charging rate of this batteries seems, this is called the electric quantity balancing function of charged state.Remove voltage (VBL) when following when cell voltage drops to electric quantity balancing, the disconnection of self discharge control switch stops self discharge, finally adjusts electric quantity balancing.
Description of drawings
Accompanying drawing is the circuit theory diagrams of the utility model embodiment.
Embodiment
As shown in drawings, a kind of charged state equalizing circuit of power lithium-ion battery.The charging circuit of power lithium-ion battery is made of series battery and connected EB+ and two positive-negative input end mouths of EB-.Series battery is in series by some joint lithium ion batteries.As specific embodiment, series battery is in series by BAT1, BAT2 and BAT3 three joint lithium ion batteries.The charged state equalizing circuit of power lithium-ion battery comprises battery protection ic unit and self discharge branch road.
The battery protection ic unit comprises the battery protection ic chip of each the single battery positive and negative end that is arranged on series battery, is followed successively by IC1 chip, IC2 chip and IC3 chip.The positive voltage binding post VDD of battery protection ic chip is used for being connected with the both positive and negative polarity of single battery with negative voltage binding post VSS.The model of used battery protection ic chip is S-8209 in the present embodiment.
The self discharge branch road is arranged at each single battery positive and negative end of series battery, and this self discharge branch road comprises a self discharge control switch and a shunt resistance R
FET, the self discharge control switch is selected a self discharge metal-oxide-semiconductor N3 for use.Corresponding to same joint single battery, the balanced control of the electric weight of battery protection ic chip is connected with the grid of self discharge metal-oxide-semiconductor N3 with lead-out terminal CB
The course of work of the present utility model:
If when BAT1 〉=electric quantity balancing detected voltage (VBU), the CB1 terminal of IC1 chip became the VDD1 current potential.Through this work, the self discharge metal-oxide-semiconductor N3 that is connected with the CB1 terminal becomes " ON ", and the conducting of self discharge branch road is by the shunt resistance R in the branch road
FETThe charging current that flows into BAT1 is shunted.At this moment, detect voltage (VBU) if BAT2, BAT3 are lower than electric quantity balancing, compare with the charging rate of BAT2, BAT3, then the charging rate of BAT1 seems steady relatively.This is called charged state electric quantity balancing function.Detect voltage (VBU) no matter the voltage of which battery reaches electric quantity balancing, corresponding separately self discharge metal-oxide-semiconductor N3 can become " ON ", thereby adjusts electric quantity balancing.In addition, because discharge, cell voltage drops to electric quantity balancing and removes voltage (VBL) when following, and the IC chip can make self discharge metal-oxide-semiconductor N3 become " OFF ", stops self discharge, finally adjusts electric quantity balancing.
Claims (3)
1. the charged state equalizing circuit of power lithium-ion battery is characterized in that: comprise
The battery protection ic unit, described battery protection ic unit comprises the battery protection ic chip of each the single battery positive and negative end that is arranged on series battery;
Be arranged at the self discharge branch road of each single battery positive and negative end of described series battery; described self discharge branch road comprises a self discharge control switch and a shunt resistance; corresponding to same joint single battery, the balanced control of the electric weight of described battery protection ic chip is connected with the control end of described self discharge control switch with lead-out terminal.
2. the charged state equalizing circuit of power lithium-ion battery as claimed in claim 1, it is characterized in that: described self discharge control switch comprises a self discharge metal-oxide-semiconductor.
3. the charged state equalizing circuit of power lithium-ion battery as claimed in claim 1, it is characterized in that: the model of described battery protection ic chip is S-8209.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202902086U CN201623235U (en) | 2009-12-15 | 2009-12-15 | Charging state equalizing circuit of power lithium ion batteries |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202902086U CN201623235U (en) | 2009-12-15 | 2009-12-15 | Charging state equalizing circuit of power lithium ion batteries |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201623235U true CN201623235U (en) | 2010-11-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202902086U Expired - Fee Related CN201623235U (en) | 2009-12-15 | 2009-12-15 | Charging state equalizing circuit of power lithium ion batteries |
Country Status (1)
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| CN (1) | CN201623235U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2561826C2 (en) * | 2012-06-29 | 2015-09-10 | Общество с ограниченной ответственностью "Системы управления хранением энергии" (ООО "СУХЭ") | Battery of electric energy storage units with distributed analytical control system |
| RU182710U1 (en) * | 2018-01-30 | 2018-08-29 | Сергей Александрович Иванов | BATTERY BATTERY MODULE |
| CN110764006A (en) * | 2019-12-30 | 2020-02-07 | 杭州华塑加达网络科技有限公司 | Battery management system |
| WO2021032221A3 (en) * | 2019-08-20 | 2021-04-15 | 深圳市道通智能航空技术股份有限公司 | Battery balancing self-discharge circuit and unmanned aerial vehicle |
-
2009
- 2009-12-15 CN CN2009202902086U patent/CN201623235U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2561826C2 (en) * | 2012-06-29 | 2015-09-10 | Общество с ограниченной ответственностью "Системы управления хранением энергии" (ООО "СУХЭ") | Battery of electric energy storage units with distributed analytical control system |
| RU182710U1 (en) * | 2018-01-30 | 2018-08-29 | Сергей Александрович Иванов | BATTERY BATTERY MODULE |
| WO2021032221A3 (en) * | 2019-08-20 | 2021-04-15 | 深圳市道通智能航空技术股份有限公司 | Battery balancing self-discharge circuit and unmanned aerial vehicle |
| CN110764006A (en) * | 2019-12-30 | 2020-02-07 | 杭州华塑加达网络科技有限公司 | Battery management system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101103 Termination date: 20141215 |
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| EXPY | Termination of patent right or utility model |