CN205921422U - Big current balance circuit system of power battery BMS of group - Google Patents
Big current balance circuit system of power battery BMS of group Download PDFInfo
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- CN205921422U CN205921422U CN201620835324.1U CN201620835324U CN205921422U CN 205921422 U CN205921422 U CN 205921422U CN 201620835324 U CN201620835324 U CN 201620835324U CN 205921422 U CN205921422 U CN 205921422U
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Abstract
The utility model discloses a big current balance circuit system of power battery BMS of group, include: a central control unit for gathering battery voltage, comparison battery voltage size and output control signal, a partial pressure starting circuit for setting for the balanced voltage of listening the starting point, an energy transduction unit for inciting somebody to action during the low power battery is transferred to to electric energy in the high electric quantity battery, partial pressure starting circuit with the energy transduction unit respectively with central control unit electric connection. Compared with the prior art, the utility model discloses can be applicable to the lithium cell that adopts different cathode material, the commonality is good, and scalability is strong, can shift the energy fast, energy transduction is efficient, and is extravagant few, improves the reliable degree of lithium cell, prolongs the life of lithium cell.
Description
Technical field
This utility model is related to a kind of power battery pack bms high current balancing circuitry system.
Background technology
With current lithium battery manufacture level and technique, lithium battery in process of production, can exist between each lithium battery
, that is, there is this problem of discordance in fine distinction.This discordance can make the parameters of lithium battery far from each other, leads
Cause the output voltage of each lithium battery different.If desired for the battery that multiple lithium battery groups are fitted together one entirety of formation
Group, then must adopt electric voltage equalization means, so could at utmost lift the performance of set of cells.On the other hand, in set of cells
Lithium battery use during, also due to the reason such as self discharge degree and spot temperature lead between lithium battery occur
Discordance phenomenon, thus the charge-discharge characteristic of impact set of cells.
In order to solve the problem of inconsistency between the above battery cell, typically now using two kinds of balance modes:
One kind is to produce battery core counterbalance effect using high voltage partial pressure, because different lithium material battery core full charging voltages are different, Er Qiechong
Electric v-a curve chart is likely to inconsistent, and this mode can lead to counterbalance effect not good, and can cause the infringement of battery core, more may be used
Reliability can be caused not enough；Another kind is consuming type, and using resistance come consumed energy, this mode can cause the temperature of set of cells
Too high, shorten battery, reliability is low.Therefore, it is necessary to provide a kind of new balancing circuitry to solve the above problems.
Utility model content
The purpose of this utility model is to provide a kind of good balance effect, long service life, the high electrokinetic cell of reliability
Group bms high current balancing circuitry system.
To achieve these goals, the technical scheme that this utility model is adopted is as follows:
A kind of power battery pack bms high current balancing circuitry system, comprising:
For gathering the central control unit of cell voltage, comparative cell voltage swing and output control signal；
For setting the partial pressure start-up circuit of the voltage of balance detecting starting point；
For the energy buanch unit in low battery battery by the electric energy transfer in high Electronic power batteries；
Described partial pressure start-up circuit and described energy buanch unit are electrically connected with described central control unit respectively；
Described energy buanch unit includes the first field effect transistor, the second field effect transistor, energy storage inductor and first to fourth electricity
Resistance, the first end of described energy storage inductor and the first battery electric connection, the second end of energy storage inductor and the source of the first field effect transistor
Pole is electrically connected with, and the grid of the first field effect transistor is electrically connected with central control unit, the drain electrode of the first field effect transistor and second
It is connected in parallel to described first resistor and second resistance between battery；The drain electrode of the second field effect transistor and the source of the first field effect transistor
Pole electric connection, the grid of the second field effect transistor and central control unit electric connection, the source electrode of the second field effect transistor and ground wire
Between be connected in parallel to described 3rd resistor and the 4th resistance.
Preferably, it is connected with the first electric capacity between described first battery and ground wire, between described second battery and ground wire simultaneously
Connection is connected with the second electric capacity and the 3rd electric capacity.
Preferably, described partial pressure start-up circuit includes pnp audion, diode and the 5th to the 8th resistance, described pnp tri-
The emitter stage of pole pipe and the second battery are electrically connected with, and are connected with described 5th resistance between the emitter stage of pnp audion and base stage,
The base stage of pnp audion is connected with the first end of the 6th resistance, and the second end of the 6th resistance is connected with the anode of diode, two poles
The negative electrode of pipe is connected with external control end, and the first end of the colelctor electrode of pnp audion and the 7th resistance is electrically connected with, the 7th resistance
The second end be electrically connected with the first end of central control unit, the 8th resistance respectively, the second end ground connection of the 8th resistance.
Compared with prior art, the beneficial effect of this utility model power battery pack bms high current balancing circuitry system exists
In: this utility model can be applicable for use with the lithium battery of different positive electrodes, and versatility is good, and extensibility is strong；Can be quick
Transfer energy, energy transfer efficiency is high, wastes few, improves the reliability of lithium battery, extends the service life of lithium battery.
Brief description
Fig. 1 is that the circuit theory of this utility model power battery pack bms high current balancing circuitry system one embodiment is illustrated
Figure.
The each labelling of in figure is as follows: 1, central control unit；2nd, partial pressure start-up circuit；3rd, energy buanch unit；Q1, first
Effect pipe；Q2, the second field effect transistor；Q3, pnp audion；C1, the first electric capacity；C2, the second electric capacity；C3, the 3rd electric capacity；D, two
Pole pipe；L, energy storage inductor；R1, first resistor；R2, second resistance；R3,3rd resistor；R4, the 4th resistance；R5, the 5th resistance；
R6, the 6th resistance；R7, the 7th resistance；R8, the 8th resistance；V1, the first battery；V2, the second battery.
Specific embodiment
With reference to specific embodiment, this utility model is further described below.
Refer to shown in Fig. 1, this utility model provides a kind of power battery pack bms high current balancing circuitry system, comprising:
For gathering the central control unit 1 of cell voltage, comparative cell voltage swing and output control signal；
For setting the partial pressure start-up circuit 2 of the voltage of balance detecting starting point；
For the energy buanch unit 3 in low battery battery by the electric energy transfer in high Electronic power batteries；
Described partial pressure start-up circuit 2 and described energy buanch unit 3 are electrically connected with described central control unit 1 respectively.
Wherein, described energy buanch unit 3 includes the first field effect transistor q1, the second field effect transistor q2, energy storage inductor l and
One to the 4th resistance, the first end of described energy storage inductor l is electrically connected with the first battery v1, second end of energy storage inductor l and the
The source electrode of one field effect transistor q1 is electrically connected with, and the grid of the first field effect transistor q1 is electrically connected with central control unit 1, first
It is connected in parallel to described first resistor r1 and second resistance r2 between the drain electrode of effect pipe q1 and the second battery v2；Second field effect
Source electrode electric connection, the grid of the second field effect transistor q2 and the central control unit 1 of the drain electrode of pipe q2 and the first field effect transistor q1
It is electrically connected with, between the source electrode of the second field effect transistor q2 and ground wire, be connected in parallel to described 3rd resistor r3 and the 4th resistance r4.
During use, described central control unit 1 can gather the voltage of the first battery v1 and the second battery v2 in real time respectively,
When the voltage of one of battery reaches setting value vcc, central control unit 1 calculates the first battery v1's and the second battery v2
Voltage difference, when voltage difference is more than 0.01vcc, starts electric energy balance function.
When the voltage of the first battery v1 is more than the voltage of the second battery v2 and voltage difference is more than 0.01vcc, using boost
Pattern sends control signal balancing electric energy, central control unit 1, makes the second field effect transistor q2 conducting, the first field effect transistor q1
Disconnect, the first battery v1 charges to energy storage inductor l, described 3rd resistor r3 and the 4th resistance r4 can detect charging current, when
When charging current exceedes setting value, central control unit 1 makes the second field effect transistor q2 disconnect, the first field effect transistor q1 conducting, storage
Second battery v2's inductance l can be discharged, thus realizing electric energy transfer, so repeating energy storage can be up to the first battery v1 and second
The voltage difference of battery v2 is less than 0.005vcc.
When the voltage of the first battery v1 is less than the voltage of the second battery v2 and voltage difference is more than 0.01vcc, using buck
Pattern sends control signal balancing electric energy, central control unit 1, makes the first field effect transistor q1 conducting, the second field effect transistor q2
Disconnect, the second battery v2 charges to energy storage inductor l, described first resistor r1 and second resistance r2 can detect charging current, when
When charging current exceedes setting value, central control unit 1 makes the first field effect transistor q1 disconnect, the second field effect transistor q2 conducting, storage
First battery v1's inductance l can be discharged, thus realizing electric energy transfer, so repeating energy storage can be up to the first battery v1 and second
The voltage difference of battery v2 is less than 0.005vcc.
During concrete application, the first battery v1 and the second battery v2 is adjacent two battery, power described in the utility model
Set of cells bms high current balancing circuitry system by the comparison to the voltage between often two neighboring battery, using buck-
Boost mode, is charged to energy storage inductor l by the high battery of voltage, and energy storage inductor l can fill the battery low to its neighboring voltage
Electricity, reaches the purpose controlling voltage differences between battery.
Additionally, being connected with the first electric capacity c1 between described first battery v1 and ground wire, described second battery v2 and ground wire it
Between be connected in parallel to the second electric capacity c2 and the 3rd electric capacity c3, the first to the 3rd electric capacity can filtering clutter, reduce other signals pair
First battery v1 and the interference of the second battery v2.
In this utility model, described partial pressure start-up circuit 2 includes pnp audion q3, diode d and the 5th to the 8th electricity
Resistance, the emitter stage of described pnp audion q3 and the second battery v2 are electrically connected with, between the emitter stage of pnp audion q3 and base stage
It is connected with described 5th resistance r5, the base stage of pnp audion q3 is connected with the first end of the 6th resistance r6, the of the 6th resistance r6
Two ends are connected with the anode of diode d, and the negative electrode of diode d is connected with external control end, the colelctor electrode of pnp audion q3 and
The first end of seven resistance r7 is electrically connected with, second end of the 7th resistance r7 respectively with central control unit 1, the 8th resistance r8 the
One end is electrically connected with, the second end ground connection of the 8th resistance r8.
During application, external control end sends control signal, makes pnp audion q3 conducting, the 7th resistance r7 and the 8th resistance
R8 carries out partial pressure to the second battery v2, and described partial pressure start-up circuit 2 can be by changing the 7th resistance r7's and the 8th resistance r8
Resistance detects the voltage of starting point (i.e. the emitter stage of pnp audion q3) to set balance, so that this utility model can be suitable for
Power-supply management system in different materials set of cells.
Below schematically this utility model and embodiments thereof are described, this description does not have restricted, accompanying drawing
Shown in be also one of embodiment of the present utility model, actual structure is not limited thereto.So, if this area
Those of ordinary skill enlightened by it, without departing from this utility model create objective in the case of, design without creative
The frame mode similar to this technical scheme and embodiment, all should belong to protection domain of the present utility model.
Claims (3)
1. a kind of power battery pack bms high current balancing circuitry system is it is characterised in that include:
For gathering the central control unit of cell voltage, comparative cell voltage swing and output control signal；
For setting the partial pressure start-up circuit of the voltage of balance detecting starting point；
For the energy buanch unit in low battery battery by the electric energy transfer in high Electronic power batteries；
Described partial pressure start-up circuit and described energy buanch unit are electrically connected with described central control unit respectively；
Described energy buanch unit includes the first field effect transistor, the second field effect transistor, energy storage inductor and first to fourth resistance, institute
State the first end of energy storage inductor and the first battery is electrically connected with, the second end of energy storage inductor is electrical with the source electrode of the first field effect transistor
Connect, the grid of the first field effect transistor and central control unit are electrically connected with, the drain electrode of the first field effect transistor and the second battery it
Between be connected in parallel to described first resistor and second resistance；The drain electrode of the second field effect transistor is electrical with the source electrode of the first field effect transistor
Connect, the grid of the second field effect transistor is electrically connected with central control unit, between the source electrode of the second field effect transistor and ground wire simultaneously
Connection is connected with described 3rd resistor and the 4th resistance.
2. power battery pack bms high current balancing circuitry system as claimed in claim 1 it is characterised in that: described first electricity
It is connected with the first electric capacity between pond and ground wire, between described second battery and ground wire, be connected in parallel to the second electric capacity and the 3rd electricity
Hold.
3. power battery pack bms high current balancing circuitry system as claimed in claim 1 it is characterised in that: described partial pressure opens
Galvanic electricity road includes pnp audion, diode and the 5th to the 8th resistance, the emitter stage of described pnp audion and the second battery electricity
Property connect, be connected with described 5th resistance between the emitter stage of pnp audion and base stage, the base stage of pnp audion and the 6th electricity
The first end of resistance connects, and the second end of the 6th resistance is connected with the anode of diode, and the negative electrode of diode is with external control end even
Connect, the first end of the colelctor electrode of pnp audion and the 7th resistance is electrically connected with, the second end of the 7th resistance respectively with central control
Unit, the first end of the 8th resistance are electrically connected with, the second end ground connection of the 8th resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620835324.1U CN205921422U (en) | 2016-08-04 | 2016-08-04 | Big current balance circuit system of power battery BMS of group |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620835324.1U CN205921422U (en) | 2016-08-04 | 2016-08-04 | Big current balance circuit system of power battery BMS of group |
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| CN205921422U true CN205921422U (en) | 2017-02-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026314A (en) * | 2016-08-04 | 2016-10-12 | 昆山金鑫新能源科技有限公司 | Power battery pack BMS large current balancing circuit system |
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2016
- 2016-08-04 CN CN201620835324.1U patent/CN205921422U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026314A (en) * | 2016-08-04 | 2016-10-12 | 昆山金鑫新能源科技有限公司 | Power battery pack BMS large current balancing circuit system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: OUYANG CHANGCHUN Inventor after: Zhang Xiaohong Inventor before: OUYANG CHANGCHUN Inventor before: Zhang Xiaohong Inventor before: Xu Huanxin |
|
| CB03 | Change of inventor or designer information | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 215000, 2 building, No. 2, building 398, Yi Sheng Road, Kunshan, Suzhou, Jiangsu Patentee after: Kunshan Jin Xin new energy Limited by Share Ltd Address before: 215000, 2 building, No. 2, building 398, Yi Sheng Road, Kunshan, Suzhou, Jiangsu Patentee before: Kunshan Jinxin New Energy Technology Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 2/F, Building 398 Yisheng Road, Kunshan High-tech Zone, Suzhou City, Jiangsu Province Patentee after: Kunshan Jinxin New Energy Technology Co., Ltd. Address before: 2/F, Building 398 Yisheng Road, Kunshan High-tech Zone, Suzhou City, Jiangsu Province Patentee before: Kunshan Jin Xin new energy Limited by Share Ltd |
|
| CP01 | Change in the name or title of a patent holder |