CN201623509U - Equalizing circuit of power lithium ion batteries - Google Patents
Equalizing circuit of power lithium ion batteries Download PDFInfo
- Publication number
- CN201623509U CN201623509U CN2010200152232U CN201020015223U CN201623509U CN 201623509 U CN201623509 U CN 201623509U CN 2010200152232 U CN2010200152232 U CN 2010200152232U CN 201020015223 U CN201020015223 U CN 201020015223U CN 201623509 U CN201623509 U CN 201623509U
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- battery
- control unit
- equalizing circuit
- power lithium
- lithium ion
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses an equalizing circuit of power lithium ion batteries, which comprises a battery detection equalizing control unit connected with the positive poles and the negative poles of single batteries in a series connection battery pack, a self-discharge subcircuit connected at the two ends of a positive pole and a negative pole of each single battery, a computing control unit connected with the battery detection equalizing control unit along double directions, and a communication unit connected with the computing control unit along the double directions. The battery detection equalizing control unit, the computing control unit and the communication unit are integrated into an IC microprocessor. The equalizing circuit of the power lithium ion batteries can solve the problems that when the plurality of lithium ion batteries are connected in series for use, 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, greatly reduces the production cost and improves the production efficiency.
Description
Technical field
The utility model relates to a kind of 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.When lithium ion battery uses as electrokinetic cell, when for example using, often need the above lithium ion battery series connection of 5 joints is used, 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.
At present, all be to adopt discrete component or be in series for the protective circuits of the above lithium ion battery group of 5 joints by a plurality of battery protection ic chips.Discrete component constitutes sampling, the comparison of protective circuit by voltage, judges whether to overcharge, overdischarge, and then the discharging and recharging of control battery pack.The circuit theory of this mode is simple, but every batteries all needs a cover to detect decision circuitry, and quiescent dissipation is very big, and along with the battery serial number increases and the power consumption increase, is unfavorable for the charged maintenance of battery.The protective circuit that a plurality of battery protection ic chips of sampling are in series, though the index of power consumption is not high, cost is higher; and poor reliability, because the voltage endurance of its chip, under the situation of some inductive load; very easily damage, the use to the lithium ion battery group has brought potential safety hazard like this.For above-mentioned protective circuit; the disposable setting when producing of the parameters of battery is finished; can not be modified; can only be applicable to the battery pack of specific standard model; therefore the scope of application is too narrow, and manufacturer is when carrying out last quality inspection, needs the workman to use checking tool such as universal instrument that each discrete component is detected one by one; time-consuming, production efficiency is lower.
Summary of the invention
Technical problem to be solved in the utility model is: the equalizing circuit that a kind of power lithium-ion battery is provided, when connecting use to solve the multi-section lithium ion battery, owing to the performance difference between each battery cell influences the retention of charge of battery pack, the problem of reduction battery pack overall performance, and greatly reduce production cost, improved production efficiency.
For solving the problems of the technologies described above, the technical solution of the utility model is: the equalizing circuit of power lithium-ion battery, comprise battery detecting Balance Control unit, the both positive and negative polarity of each single battery in the input port of described battery detecting Balance Control unit and the series battery is connected; 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 an equalizing resistance, and the control end of described self discharge control switch is connected with the Balance Control terminal of described battery detecting Balance Control unit; Operations Analysis, described Operations Analysis and described battery detecting Balance Control two-way connection of unit; To the communication unit that battery parameter is set and read, described communication unit is connected with described Operations Analysis is two-way.
As a kind of optimized technical scheme, described battery detecting Balance Control unit, described Operations Analysis and described communication unit are integrated in the inside of an IC microprocessor.
As a kind of optimized technical scheme, described self discharge control switch is one the 3rd metal-oxide-semiconductor.
As a kind of optimized technical scheme, described communication unit comprise with the two-way memory cell that is connected of described Operations Analysis with the two-way communication interface that is connected of described memory cell.Described memory cell is made up of EPROM.
After having adopted technique scheme, the beneficial effects of the utility model are:
1. equalizing circuit of the present utility model; owing to battery detecting Balance Control unit, Operations Analysis and communication unit are integrated in the inside of an IC microprocessor; can control by coding; simplified hardware circuit design; reduced the components and parts number; dwindled volume, IC microprocessor can save the battery pack that lithium ion battery forms to 5-13 and protect, and greatly reduces production cost.
2. because equalizing circuit of the present utility model comprises a communication unit; can set different battery parameters at the lithium ion battery group of different model specification; widened the scope of application of protective circuit greatly; and because parameters can be set, can read; can carry out quality testing fast; greatly facilitate the operation of factory, improved the continuous productive process ability, and then improved production efficiency.
3. this equalizing circuit has effectively guaranteed the consistency of each monomer battery voltage of battery pack, has improved the whole retention of charge of battery pack, is particularly suitable for the battery pack use that the above lithium ion battery of five joints is in series.
Description of drawings
Accompanying drawing is the structured flowchart of the utility model embodiment.
Embodiment
As shown in drawings, a kind of equalizing circuit of power lithium-ion battery.This power lithium-ion battery is composed in series by the above single-unit lithium ion battery of 5 joints.
The equalizing circuit of the utility model power lithium-ion battery comprises: the both positive and negative polarity of each single battery in the battery detecting Balance Control unit, the input port of this battery detecting Balance Control unit and series battery is connected; Also be provided with the self discharge branch road of a correspondence at each single battery positive and negative end, this self discharge branch road comprises a self discharge control switch and an equalizing resistance Rb, this self discharge control switch can adopt one the 3rd metal-oxide-semiconductor N3, and the grid of the 3rd metal-oxide-semiconductor N3 is connected with the Balance Control terminal CB of battery detecting Balance Control unit; Operations Analysis, this Operations Analysis and two-way connection of battery detecting Balance Control unit; Comprise that also is used for the communication unit that battery parameter is set and read, this communication unit is connected with Operations Analysis is two-way, communication unit comprise with the two-way memory cell that is connected of Operations Analysis with the two-way communication interface that is connected of memory cell, this memory cell is made up of EPROM.Above-mentioned battery detecting Balance Control unit, Operations Analysis and communication unit is integrated in the inside of an IC microprocessor.
The course of work of the present utility model: at first,, battery parameter is set, stored among the EPROM by communication unit according to the specifications and models of the battery pack that adopts.When battery pack is in charged state and shelves state, the battery detecting Balance Control unit of IC microprocessor internal uninterruptedly detects each cell, and detecting transfer of data to Operations Analysis, Operations Analysis compares the data among data and the EPROM, when each monomer battery voltage difference exceeds the setting voltage difference, Operations Analysis output control signal makes the Balance Control terminal CB output high level of battery detecting Balance Control unit, self discharge control switch the 3rd metal-oxide-semiconductor N3 conducting that is attached thereto, cell is by equalizing resistance Rb discharge, in the time of in voltage difference drops to setting range, Balance Control terminal CB becomes low level by high level, the 3rd metal-oxide-semiconductor N3 disconnects, cell stops discharge, voltage and other cell voltage of this cell are consistent, this equalizing circuit has effectively guaranteed the consistency of each monomer battery voltage of battery pack, improve the whole retention of charge of battery pack, be particularly suitable for the battery pack use that the above lithium ion battery of five joints is in series.When in factory, carrying out the last examination and test of products; the splicing ear of communication interface is connected with computer, and then the parameters of this protective circuit and battery pack just can greatly facilitate the operation of factory by directly reading on the computer; improve the continuous productive process ability, and then improved production efficiency.
Claims (5)
1. the equalizing circuit of power lithium-ion battery is characterized in that: comprise
The both positive and negative polarity of each single battery in the battery detecting Balance Control unit, the input port of described battery detecting Balance Control unit and series battery is connected;
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 an equalizing resistance, and the control end of described self discharge control switch is connected with the Balance Control terminal of described battery detecting Balance Control unit;
Operations Analysis, described Operations Analysis and described battery detecting Balance Control two-way connection of unit;
To the communication unit that battery parameter is set and read, described communication unit is connected with described Operations Analysis is two-way.
2. the equalizing circuit of power lithium-ion battery as claimed in claim 1, it is characterized in that: described battery detecting Balance Control unit, described Operations Analysis and described communication unit are integrated in the inside of an IC microprocessor.
3. the equalizing circuit of power lithium-ion battery as claimed in claim 2, it is characterized in that: described self discharge control switch is one the 3rd metal-oxide-semiconductor.
4. the equalizing circuit of power lithium-ion battery as claimed in claim 3 is characterized in that: described communication unit comprise with the two-way memory cell that is connected of described Operations Analysis with the two-way communication interface that is connected of described memory cell.
5. the equalizing circuit of power lithium-ion battery as claimed in claim 4, it is characterized in that: described memory cell is made up of EPROM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200152232U CN201623509U (en) | 2010-01-12 | 2010-01-12 | Equalizing circuit of power lithium ion batteries |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200152232U CN201623509U (en) | 2010-01-12 | 2010-01-12 | Equalizing circuit of power lithium ion batteries |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201623509U true CN201623509U (en) | 2010-11-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010200152232U Expired - Fee Related CN201623509U (en) | 2010-01-12 | 2010-01-12 | Equalizing circuit of power lithium ion batteries |
Country Status (1)
| Country | Link |
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| CN (1) | CN201623509U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103779886A (en) * | 2012-10-18 | 2014-05-07 | 原子能和替代能源委员会 | Electrical power supply system with modular capacity |
| CN109085506A (en) * | 2018-07-31 | 2018-12-25 | 安徽优旦科技有限公司 | A kind of equilibrium failure detection control circuit and application method |
-
2010
- 2010-01-12 CN CN2010200152232U patent/CN201623509U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103779886A (en) * | 2012-10-18 | 2014-05-07 | 原子能和替代能源委员会 | Electrical power supply system with modular capacity |
| CN109085506A (en) * | 2018-07-31 | 2018-12-25 | 安徽优旦科技有限公司 | A kind of equilibrium failure detection control circuit and application method |
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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: 20150112 |
|
| EXPY | Termination of patent right or utility model |