CN202586380U - Novel cell energy balance device - Google Patents
Novel cell energy balance device Download PDFInfo
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- CN202586380U CN202586380U CN 201120451098 CN201120451098U CN202586380U CN 202586380 U CN202586380 U CN 202586380U CN 201120451098 CN201120451098 CN 201120451098 CN 201120451098 U CN201120451098 U CN 201120451098U CN 202586380 U CN202586380 U CN 202586380U
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Abstract
The utility model discloses a novel cell energy balance device, comprising an energy balance capacitor, a plurality of MOS pipe switch circuits, a plurality of drive circuits, a capacitor voltage detection circuit and a master control circuit; each MOS pipe switch circuit is in connection between a corresponding cell and the energy balance capacitor; the number of the drive circuits is the same with the number of the MOS pipe switch circuits; output terminals of the plurality of drive circuits are respectively in corresponding connection with the MOS pipe switch circuits; the master control circuit monitors each cell voltage through the capacitor voltage detection circuit, and when a cell voltage is detected to be too high, a corresponding MOS pipe switch circuit is controlled to conduct to charge the energy balance capacitor; when charging is finished, the MOS pipe switch circuit is shut off, a MOS pipe switch circuit with low cell voltage is opened, and the energy balance capacitor charges a unit cell; the action is repeated until energy is transferred with no loss from a cell with high voltage to a cell with low voltage to balance energy among cells.
Description
[technical field]
The utility model relates to novel battery balancing energy device.
[background technology]
Lithium battery is in the series connection use, and cell voltage equals single battery voltage sum.But the parameter of each cell is understood some mismatch in manufacturing or the use, if do not carry out the cell equilibrium, one or more batteries can be owed charging or overcharge, and cause shorter battery life.
The balanced main mode of lithium battery has at present: resistance shunt method, switching capacity method and DC-DC converter method.
The resistance shunt method capacity usage ratio is low, and shunt resistance has produced loss; The switching capacity method utilizes switch and electric capacity combination to realize the NE BY ENERGY TRANSFER between adjacent cell, but reliability is not high, and balancing speed is slow;
The balanced secondary winding of centralized transformer in the DC-DC converter technique is difficult to coupling, and the voltage difference that leakage inductance caused of transformer also is difficult to compensation, and there is the not high problem of efficient in the distribution transformer equalization.
Therefore be necessary to improve, study a kind of can the efficient height, fireballing equalization methods.
[utility model content]
The utility model has overcome the deficiency of above-mentioned technology, and novel battery balancing energy device is provided, and this device can be realized the harmless balancing energy between cell more fast, has overcome the unbalanced defective of existing lithium battery.
For realizing above-mentioned purpose, the utility model has adopted following technical proposal:
Novel battery balancing energy device includes
One balancing energy is with capacitor 1;
A plurality of metal-oxide-semiconductor switching circuits 2, each metal-oxide-semiconductor switching circuit 2 are connected corresponding battery and said balancing energy with between the capacitor 1;
A plurality of drive circuits 3, its quantity is identical with metal-oxide-semiconductor switching circuit 2, the output of a plurality of drive circuits 3 respectively with a plurality of metal-oxide-semiconductor switching circuit 2 corresponding connections;
One condenser voltage testing circuit 4, its two inputs are connected with the two ends of balancing energy with capacitor 1 respectively;
One governor circuit 5; This governor circuit 5 is through condenser voltage testing circuit 4 each cell voltage of monitoring, and when monitoring a certain cell voltage when too high, the corresponding metal-oxide-semiconductor switching circuit conducting of control is charged with capacitor 1 to balancing energy; After accomplishing, charging turn-offs this road metal-oxide-semiconductor switching circuit; And open the low metal-oxide-semiconductor switching circuit of cell voltage, balancing energy charges to this cell with capacitor, so repeatedly; Make energy by the high battery of voltage harmless transfer to the low battery of voltage, make balancing energy between battery.
Said metal-oxide-semiconductor switching circuit 2 comprises the first metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2, the 3rd metal-oxide-semiconductor Q3, the 4th metal-oxide-semiconductor Q4, and the drain electrode of the drain electrode of the first metal-oxide-semiconductor Q1, the 3rd metal-oxide-semiconductor Q3 is connected with the positive pole of battery, the negative pole of battery respectively; The drain electrode of the drain electrode of the second metal-oxide-semiconductor Q2, the 4th metal-oxide-semiconductor Q4 is connected with the negative pole of capacitor 1 with positive pole, the balancing energy of balancing energy with capacitor 1 respectively; The source electrode of the first metal-oxide-semiconductor Q1 is connected with the source electrode of the second metal-oxide-semiconductor Q2, and the grid of the first metal-oxide-semiconductor Q1 is connected the back and is connected with the output of drive circuit 3 with the grid of the second metal-oxide-semiconductor Q2; The source electrode of the 3rd metal-oxide-semiconductor Q3 is connected with the source electrode of the 4th metal-oxide-semiconductor Q4, and the grid of the 3rd metal-oxide-semiconductor Q3 is connected the back and is connected with the output of drive circuit 3 with the grid of the 4th metal-oxide-semiconductor Q4.
Said condenser voltage testing circuit 4 comprises the series connection first detection resistance R 1 and the second testing circuit R2 together; The connected node of the first detection resistance R 1 and the second testing circuit R2 is connected with governor circuit 5; The other end of the first detection resistance R 1 is connected with the positive pole of balancing energy with capacitor 1 through behind the metal-oxide-semiconductor of two series connection; The other end of the second testing circuit R2 is connected with the negative pole of balancing energy with capacitor 1 through behind the metal-oxide-semiconductor of two other series connection, between these four metal-oxide-semiconductor grids and governor circuit 5, is connected with to detect with drive circuit 6.
Said governor circuit 5 adopts microprocessor.
The beneficial effect of the utility model is: gather the monomer battery voltage in the battery pack; According to the difference of each monomer battery voltage, carry out equilibrium, adopt metal-oxide-semiconductor to reduce the energy loss in the balancing procedure as switch; Jumbo electric capacity is adopted in the transfer of energy, has improved balancing speed greatly.
[description of drawings]
Fig. 1 is the block diagram of the utility model;
Fig. 2 is the circuit theory diagrams of the utility model.
[embodiment]
The utility model is a novel battery balancing energy device, includes
One balancing energy is with capacitor 1;
The joint number of the battery in a plurality of metal-oxide-semiconductor switching circuits 2, the quantity of metal-oxide-semiconductor switching circuit 2 and battery pack is identical, and battery that a plurality of metal-oxide-semiconductor switching circuits 2 respectively will corresponding connection with it and balancing energy are with capacitor 1 parallel connection;
A plurality of drive circuits 3, its quantity is identical with metal-oxide-semiconductor switching circuit 2, the output of a plurality of drive circuits 3 respectively with a plurality of metal-oxide-semiconductor switching circuit 2 corresponding connections;
One condenser voltage testing circuit 4, its two inputs are connected with the two ends of balancing energy with capacitor 1 respectively;
One controls a plurality of metal-oxide-semiconductor switching circuits 2 governor circuit 5 of conductings respectively respectively through a plurality of drive circuits 3; Said governor circuit 5 adopts microprocessor STM32.
The output of said condenser voltage testing circuit 4 is connected with governor circuit 5.
Said metal-oxide-semiconductor switching circuit 2 comprises the first metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2, the 3rd metal-oxide-semiconductor Q3, the 4th metal-oxide-semiconductor Q4, and the drain electrode of the drain electrode of the first metal-oxide-semiconductor Q1, the 3rd metal-oxide-semiconductor Q3 is connected with the positive pole of battery, the negative pole of battery respectively; The drain electrode of the drain electrode of the second metal-oxide-semiconductor Q2, the 4th metal-oxide-semiconductor Q4 is connected with the negative pole of capacitor 1 with positive pole, the balancing energy of balancing energy with capacitor 1 respectively; The source electrode of the first metal-oxide-semiconductor Q1 is connected with the source electrode of the second metal-oxide-semiconductor Q2, and the grid of the first metal-oxide-semiconductor Q1 is connected the back and is connected with the output of drive circuit 3 with the grid of the second metal-oxide-semiconductor Q2; The source electrode of the 3rd metal-oxide-semiconductor Q3 is connected with the source electrode of the 4th metal-oxide-semiconductor Q4, and the grid of the 3rd metal-oxide-semiconductor Q3 is connected the back and is connected with the output of drive circuit 3 with the grid of the 4th metal-oxide-semiconductor Q4.The structure of drive circuit 3 here is not described in detail referring to accompanying drawing 2.
Said condenser voltage testing circuit 4 comprises the series connection first detection resistance R 1 and the second testing circuit R2 together; The connected node of the first detection resistance R 1 and the second testing circuit R2 is connected with governor circuit 5; The other end of the first detection resistance R 1 is connected with the positive pole of balancing energy with capacitor 1 through behind the metal-oxide-semiconductor of two series connection; The other end of the second testing circuit R2 is connected with the negative pole of balancing energy with capacitor 1 through behind the metal-oxide-semiconductor of two other series connection, between these four metal-oxide-semiconductor grids and governor circuit 5, is connected with to detect with drive circuit 6.Detect and have identical circuit structure with said drive circuit 3 with drive circuit 6.
The operation principle of the utility model is following:
1, single battery and balancing energy are with conducting between the capacitor and disconnection
When the PWM of microprocessor STM32 port produces pwm signal; Drive corresponding drive circuit works; The output resistance R3 of drive circuit; The R4 two ends produce the voltage difference of several volts respectively, thereby control its corresponding 4 metal-oxide-semiconductor Q1, Q2, Q3, Q4 conducting, the cell that metal-oxide-semiconductor connects to balancing energy with capacitor 1 charge or discharge; When the port of microprocessor STM32 did not produce pwm signal, the drive circuit output voltage was 0, and 4 metal-oxide-semiconductors of its control turn-off, no longer to balancing energy with capacitor 1 charge or discharge.
2, the voltage acquisition of single battery
Microprocessor is through detecting the conducting with 4 metal-oxide-semiconductor Q5 of drive circuit 6 controls, Q6, Q7, Q8; Detect resistance R 1 and the balanced voltage (also being monomer battery voltage) with capacitor of the second testing circuit R2 collecting energy through first then, the ADC port that is sent to microprocessor STM32 carries out the AD conversion.Other cell of series connection also is an as above working method.
3, battery balanced process
Microprocessor is through each monomer battery voltage of AD conversion monitoring; When monitoring a certain monomer battery voltage when too high; This cell is passed through the conducting of control metal-oxide-semiconductor switching circuit to balancing energy electricity consumption condenser charge; Turn-off this road metal-oxide-semiconductor switching circuit after charging is accomplished, and open the low metal-oxide-semiconductor switching circuit of monomer battery voltage, balancing energy charges to this cell with capacitor.Process so repeatedly, make energy by the high battery of voltage harmless transfer to the low battery of voltage, realized the balancing energy between cell.
Through above series of voltage monitoring and battery balanced process; Monitor each monomer battery voltage in real time, low or too high if a certain monomer battery voltage is crossed, this balancing procedure will start; The cell electric charge that voltage is high is transferred to the low cell of voltage, has realized the harmless transfer of energy.
Claims (4)
1. novel battery balancing energy device is characterized in that including
One balancing energy is with capacitor (1);
A plurality of metal-oxide-semiconductor switching circuits (2), each metal-oxide-semiconductor switching circuit (2) are connected corresponding battery and said balancing energy with between the capacitor (1);
A plurality of drive circuits (3), its quantity is identical with metal-oxide-semiconductor switching circuit (2), the output of a plurality of drive circuits (3) respectively with the corresponding connection of a plurality of metal-oxide-semiconductor switching circuits (2);
One condenser voltage testing circuit (4), its two inputs are connected with the two ends of balancing energy with capacitor (1) respectively;
One governor circuit (5); This governor circuit (5) is monitored each cell voltage through condenser voltage testing circuit (4), and when monitoring a certain cell voltage when too high, the corresponding metal-oxide-semiconductor switching circuit conducting of control is charged with capacitor (1) to balancing energy; After accomplishing, charging turn-offs this road metal-oxide-semiconductor switching circuit; And open the low metal-oxide-semiconductor switching circuit of cell voltage, balancing energy charges to this cell with capacitor, so repeatedly; Make energy by the high battery of voltage harmless transfer to the low battery of voltage, make balancing energy between battery.
2. novel battery balancing energy device according to claim 1; It is characterized in that said metal-oxide-semiconductor switching circuit (2) comprises the first metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2, the 3rd metal-oxide-semiconductor Q3, the 4th metal-oxide-semiconductor Q4, the drain electrode of the drain electrode of the first metal-oxide-semiconductor Q1, the 3rd metal-oxide-semiconductor Q3 is connected with the positive pole of battery, the negative pole of battery respectively; The drain electrode of the drain electrode of the second metal-oxide-semiconductor Q2, the 4th metal-oxide-semiconductor Q4 is connected with the negative pole of capacitor (1) with positive pole, the balancing energy of balancing energy with capacitor (1) respectively; The source electrode of the first metal-oxide-semiconductor Q1 is connected with the source electrode of the second metal-oxide-semiconductor Q2, and the grid of the first metal-oxide-semiconductor Q1 is connected the back and is connected with the output of drive circuit (3) with the grid of the second metal-oxide-semiconductor Q2; The source electrode of the 3rd metal-oxide-semiconductor Q3 is connected with the source electrode of the 4th metal-oxide-semiconductor Q4, and the grid of the 3rd metal-oxide-semiconductor Q3 is connected the back and is connected with the output of drive circuit (3) with the grid of the 4th metal-oxide-semiconductor Q4.
3. novel battery balancing energy device according to claim 1; It is characterized in that said condenser voltage testing circuit (4) comprises the series connection first detection resistance R 1 and the second testing circuit R2 together; The connected node of the first detection resistance R 1 and the second testing circuit R2 is connected with governor circuit (5); The other end of the first detection resistance R 1 is connected with the positive pole of balancing energy with capacitor (1) through behind the metal-oxide-semiconductor of two series connection; The other end of the second testing circuit R2 is connected with the negative pole of balancing energy with capacitor (1) through behind the metal-oxide-semiconductor of two other series connection, between these four metal-oxide-semiconductor grids and governor circuit (5), is connected with to detect with drive circuit (6).
4. novel battery balancing energy device according to claim 1 is characterized in that said governor circuit (5) adopts microprocessor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120451098 CN202586380U (en) | 2011-11-15 | 2011-11-15 | Novel cell energy balance device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120451098 CN202586380U (en) | 2011-11-15 | 2011-11-15 | Novel cell energy balance device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202586380U true CN202586380U (en) | 2012-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120451098 Expired - Fee Related CN202586380U (en) | 2011-11-15 | 2011-11-15 | Novel cell energy balance device |
Country Status (1)
| Country | Link |
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| CN (1) | CN202586380U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102593882A (en) * | 2011-11-15 | 2012-07-18 | 中山普润斯电源设备技术有限公司 | Energy balancing device for batteries in battery pack |
| CN104935051A (en) * | 2015-06-30 | 2015-09-23 | 深圳市理邦精密仪器股份有限公司 | A series battery equalization circuit |
-
2011
- 2011-11-15 CN CN 201120451098 patent/CN202586380U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102593882A (en) * | 2011-11-15 | 2012-07-18 | 中山普润斯电源设备技术有限公司 | Energy balancing device for batteries in battery pack |
| CN104935051A (en) * | 2015-06-30 | 2015-09-23 | 深圳市理邦精密仪器股份有限公司 | A series battery equalization circuit |
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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: 20121205 Termination date: 20131115 |