CN201854063U - Equalization discharge device for high-capacity rechargeable battery pack - Google Patents
Equalization discharge device for high-capacity rechargeable battery pack Download PDFInfo
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- CN201854063U CN201854063U CN201020610154XU CN201020610154U CN201854063U CN 201854063 U CN201854063 U CN 201854063U CN 201020610154X U CN201020610154X U CN 201020610154XU CN 201020610154 U CN201020610154 U CN 201020610154U CN 201854063 U CN201854063 U CN 201854063U
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- rechargeable battery
- capacity rechargeable
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- central controller
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Abstract
The utility model relates to an equalization discharge device for a high-capacity rechargeable battery pack. The equalization discharge device comprises a central controller, an equalization circuit and an electric quantity collection device, wherein the output end of the electric quantity collection device is connected with an input end of the central controller; the output end of the central controller is connected with an input end of the equalization circuit; the device can be connected with external high-capacity rechargeable batteries; the output end of the high-capacity rechargeable batteries is connected with an input end of the electric quantity collection device; and input ends of the high-capacity rechargeable batteries are connected with an output end of the equalization circuit. Therefore, the device can be adopted for maintenance of the high-capacity rechargeable battery pack so as to ensure the equalization of capacities of all the batteries in the battery pack, effectively improve the performance of the battery pack and prolong the service life of the battery pack.
Description
Technical field:
The utility model relates to field of power management, is specifically related to a kind of device that can carry out balanced discharge to big capacity rechargeable battery set.
Background technology:
Big capacity rechargeable battery set in use generally adopts the series system power supply, generally also be to adopt the series system charging in charging process, because the difference of battery cell on performance, if constantly it is not being carried out equilibrium in the charging and discharging process, then the unbalanced meeting of battery pack is more and more serious, the dead battery that has to the end, and the battery that has is full, the performance of whole battery group then is to be decided by the minimum battery of electric weight, when wherein a batteries did not have electric weight, then whole battery group all can not normal power supply.
Address this problem the general redesign charger that needs, in charger, increase the method for equalizing charge, promptly in charging process, realize the equilibrium of battery pack by equalizing circuit and management software, but, increase the equalizing charge function and will significantly increase the volume of charger, reach cost, and the complexity of circuit also will increase the unsteadiness of charger.
The utility model content:
Technical problem to be solved in the utility model is: at big capacity rechargeable battery set in the above-mentioned prior art in use for some time performance significantly reduce, battery pack exists the deficiency of unbalanced phenomena, a kind of big capacity rechargeable battery set balanced discharge device is provided, so that big capacity rechargeable battery set can regularly adopt this device to safeguard, to guarantee the equilibrium of each battery capacity of battery pack.
In order to solve the problems of the technologies described above, the technical scheme that the utility model adopted is: a kind of big capacity rechargeable battery set balanced discharge device, be characterized in: this device comprises central controller, equalizing circuit, electric quantity collector, the output of this electric quantity collector is connected with the input of central controller, the output of this central controller is connected with the input of equalizing circuit, and this device can external big capacity rechargeable battery, the output of this big capacity rechargeable battery is connected with the input of electric quantity collector, and the input of this big capacity rechargeable battery is connected with the output of equalizing circuit.
Described device also comprises liquid crystal display screen, reaches button, and the input of this liquid crystal display screen is connected with the output of described central controller, and the output of this button is connected with the input of described central controller.Described equalizing circuit comprises input circuit and output circuit, this input circuit is connected by photoelectrical coupler with output circuit, this input circuit is made of DC power supply VDD and pwm control signal, and this output circuit is a discharge loop, is made up of field effect transistor and high-power resistance R5.Described electric quantity collector comprises electronic switch and Coulomb meter, and this electronic switch is connected with this Coulomb meter.The CPU of described central controller adopts the C8051F340 single-chip microcomputer.
This Design of device principle is: the unbalanced essence of battery pack is exactly that the tolerance of battery is big, so being exactly the cell that capacity is higher, balanced principle adopt bigger discharging current to remove to discharge its energy, and the lower cell of capacity adopts less discharging current, discharging current is directly proportional with battery capacity, and the discharge back just can be controlled at the tolerance of each cell in certain scope like this.
Compared with prior art, the utility model has the advantages that:
1. from the angle of equilibrium, can improve the performance of battery pack, the life-span of prolongation battery pack effectively.
2. from the angle of discharge, can carry out equilibrium to battery pack, circuit is simple, the reliability height.
3. intelligent balanced discharge mode is provided, detects joint number, the electric weight of battery pack automatically, select time for balance, discharging current size etc. intelligently.
4. control the discharging current size in the PWM mode.
5. discharging current is big, is 5A to the maximum.
6. multipotency carries out equilibrium to the battery pack that 8 batteries constitute.
7. adopt balanced discharge device among the present invention to after the battery pack balancing discharge, the tolerance of each battery is controlled in 1% error range.
8. the multiple interfaces mode is applicable to different types of battery pack.
9. liquid crystal display screen can intuitively show battery meter and operating state.
10. simple to operate, a key operation.
Description of drawings:
Fig. 1 is a structured flowchart of the present utility model.
Fig. 2 is the schematic diagram that central controller of the present utility model disposes each interface.
Fig. 3 is equalizing circuit figure of the present utility model.
Fig. 4 is an electric quantity acquisition schematic diagram of the present utility model.
Fig. 5 is the utility model equalization algorithm flow chart.
Embodiment:
Extremely shown in Figure 4 referring to Fig. 1, the utility model is a kind of big capacity rechargeable battery set balanced discharge device, it comprises central controller 1, equalizing circuit 2, electric quantity collector 3, liquid crystal display screen 4, and button 6, the output of this electric quantity collector 3 is connected by the input of data/address bus with central controller 1, the output of this central controller 1 is connected by the input of control bus with equalizing circuit 3, the output of this central controller 1 also is connected with liquid crystal display screen 4 by data/address bus, this liquid crystal display screen 4 shows the capacity of job menu and each cell, this balanced discharge device can external big capacity rechargeable battery 5, and by the power supply bus output of big capacity rechargeable battery 5 is connected with the input of electric quantity collector 3, the input of big capacity rechargeable battery 5 is connected with the output of equalizing circuit 2, and the output of this button 6 is connected with the input of central controller 1,6 this big capacity rechargeable battery 5 is carried out balanced discharge operation so that push button by balanced discharge device of the present utility model.
The CPU of this central controller 1 selects the C8051F340 single-chip microcomputer of SoC single-chip microcomputer C8051F series for use.The speed of service per second of this single-chip microcomputer can reach 25MIPS.It has and MCS-51 single-chip microcomputer kernel and the compatible fully microcontroller of instruction set.It except having standard 8051NJ digital peripherals parts, also integrated analog component and other digital peripherals and functional part commonly used in the data acquistion and control system in the sheet.FLASH memory in the C8051F single-chip microcomputer also has the ability of online reprogramming: both can be used as program storage, can be used for non-volatile data storage again.The CPU of this central controller 1 mixes A/D sampling interface, PWM control interface, LCD Interface, keyboard interface etc. can realize control to whole system, as shown in Figure 2.
Referring to Fig. 3, as can be known, this equalizing circuit 2 comprises input circuit and output circuit, input circuit is connected by photoelectrical coupler with output circuit, this input circuit is made of DC power supply VDD and pwm control signal, output circuit is a discharge loop, and this discharge loop is made up of field effect transistor and high-power resistance R5.
This electric quantity collector 3 comprises electronic switch 31 and Coulomb meter 32, and this electronic switch 31 is connected with this Coulomb meter 32, as shown in Figure 4.
During operation, by cable or electric wire large-capacity battery pack 5 is linked to each other with this balanced discharge device, configure parameter, for example battery joint number, time for balance, discharging current size etc. are not (if set, the balanced discharge case then adopts aptitude manner that it is carried out balanced discharge, automatically detect joint number, the electric weight of battery pack, select time for balance, discharging current size etc. intelligently.) press " beginning " button 6, begin large-capacity battery pack 5 is carried out the balanced discharge operation, the electric weight of each monomer reaches the electronic switch 31 of electric quantity collector 3 in this large-capacity battery pack 5, electronic switch 31 exports the electric weight of each cell to Coulomb meter 32 successively by scan mode, Coulomb meter 32 converts electric weight to voltage is sent to central controller 1 by data/address bus A/D sampling interface, central controller 1 is according to the tolerance situation of each cell, control the discharging current of each cell by equalization algorithm, and the output pwm control signal passes through the PWM control interface to equalizing circuit 2, pwm control signal is via light-coupled isolation, input to each cell in the large-capacity battery pack 5 after field effect transistor is amplified, and reach balanced effect.Blinking red lamp in the balancing procedure when indicator light becomes green, is then represented balanced success, shows the capacity of each cell on liquid crystal display screen.
Referring to shown in Figure 5, be the equalization algorithm flow chart in addition, its step is specific as follows:
The 1st step: press " beginning " button 6; Enter init state;
The 2nd step: with the electric weight X of each cell in the electric quantity collector 3 circle collection large-capacity battery pack 5
1～Xn (n≤8);
The 3rd step: find out each cell electric weight X
1Minimum value Nmin among the～Xn (n≤8);
The 4th step: the difference E that calculates electric weight between the battery of each cell and tool minimum amount of power
1～En (n≤8);
The 5th step: find out above-mentioned electric weight difference E
1Maximum K between～En (n≤8);
The 6th step: utilize formula: PWM=En/K * 50% (n≤8) at last, calculate the duty ratio of the discharge of each cell.
So, according to the electric weight of each cell in the large-capacity battery pack 5 of input, can calculate the duty ratio of the discharge of corresponding cell, duty ratio is from 0%～50%, and duty ratio is big more, and then corresponding balanced discharge electric current is big more.
Claims (6)
1. one kind big capacity rechargeable battery set balanced discharge device, it is characterized in that: this device comprises central controller (1), equalizing circuit (2), electric quantity collector (3), the output of this electric quantity collector (3) is connected with the input of central controller (1), the output of this central controller (1) is connected with the input of equalizing circuit (3), and this device can external big capacity rechargeable battery (5), the output of this big capacity rechargeable battery (5) is connected with the input of electric quantity collector (3), and the input of this big capacity rechargeable battery (5) is connected with the output of equalizing circuit (2).
2. big capacity rechargeable battery set balanced discharge device as claimed in claim 1, it is characterized in that: described device also comprises liquid crystal display screen (4), the input of this liquid crystal display screen (4) is connected with the output of described central controller (1).
3. big capacity rechargeable battery set balanced discharge device as claimed in claim 1, it is characterized in that: described device also comprises button (6), the output of this button (6) is connected with the input of described central controller (1).
4. as claim 1 or 2 or 3 described big capacity rechargeable battery set balanced discharge devices, it is characterized in that: described equalizing circuit (2) comprises input circuit and output circuit, this input circuit is connected by photoelectrical coupler with output circuit, this input circuit is made of DC power supply VDD and pwm control signal, this output circuit is a discharge loop, is made up of field effect transistor and high-power resistance R5.
5. as claim 1 or 2 or 3 described big capacity rechargeable battery set balanced discharge devices, it is characterized in that: described electric quantity collector (3) comprises electronic switch (31) and Coulomb meter (32), and this electronic switch (31) is connected with this Coulomb meter (32).
6. as claim 1 or 2 or 3 described big capacity rechargeable battery set balanced discharge devices, it is characterized in that: the CPU of described central controller (1) adopts the C8051F340 single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020610154XU CN201854063U (en) | 2010-11-16 | 2010-11-16 | Equalization discharge device for high-capacity rechargeable battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020610154XU CN201854063U (en) | 2010-11-16 | 2010-11-16 | Equalization discharge device for high-capacity rechargeable battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201854063U true CN201854063U (en) | 2011-06-01 |
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ID=44096443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020610154XU Expired - Fee Related CN201854063U (en) | 2010-11-16 | 2010-11-16 | Equalization discharge device for high-capacity rechargeable battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201854063U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103913707A (en) * | 2012-12-28 | 2014-07-09 | 株式会社半导体能源研究所 | Semiconductor device |
| CN105150963A (en) * | 2015-08-05 | 2015-12-16 | 东莞市钜大电子有限公司 | Stable automobile power supply system |
-
2010
- 2010-11-16 CN CN201020610154XU patent/CN201854063U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103913707A (en) * | 2012-12-28 | 2014-07-09 | 株式会社半导体能源研究所 | Semiconductor device |
| CN103913707B (en) * | 2012-12-28 | 2018-04-20 | 株式会社半导体能源研究所 | Semiconductor device |
| CN105150963A (en) * | 2015-08-05 | 2015-12-16 | 东莞市钜大电子有限公司 | Stable automobile power supply system |
| CN105150963B (en) * | 2015-08-05 | 2017-12-08 | 东莞市钜大电子有限公司 | A kind of automobile power system of stabilization |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110601 Termination date: 20121116 |