CN107769288A - Capacitor charger system - Google Patents
Capacitor charger system Download PDFInfo
- Publication number
- CN107769288A CN107769288A CN201610698302.XA CN201610698302A CN107769288A CN 107769288 A CN107769288 A CN 107769288A CN 201610698302 A CN201610698302 A CN 201610698302A CN 107769288 A CN107769288 A CN 107769288A
- Authority
- CN
- China
- Prior art keywords
- voltage
- cell
- module
- magnitude
- drive signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 title claims abstract description 11
- 230000005611 electricity Effects 0.000 claims description 6
- 239000004065 semiconductor Substances 0.000 description 6
- 239000000178 monomer Substances 0.000 description 5
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0019—Circuits for equalisation of charge between batteries using switched or multiplexed charge circuits
-
- H02J7/0026—
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00302—Overcharge protection
Abstract
The invention provides a kind of capacitor charger system, including voltage acquisition module, the magnitude of voltage of cell is often saved in battery pack for gathering；Voltage operational module, the magnitude of voltage for often saving cell for voltage acquisition module to be exported compares with default overvoltage threshold respectively, when the magnitude of voltage of certain section cell exceedes default overvoltage threshold, then a drive signal for corresponding to the section cell is exported；Balance charge/discharge module, it is made up of several control units, the both positive and negative polarity with each section cell in battery pack is connected respectively, when receiving the drive signal of over-pressed computing module output, control unit corresponding to drive signal driving controls its corresponding cell electric discharge until the magnitude of voltage of the section cell is equal to default overvoltage threshold.The present invention makes battery be not in overcharge expansion, blast and cross to put failure, so as to greatly strengthen the security and useful life of battery.
Description
Technical field
The present invention relates to the protection circuit of rechargeable battery, more particularly to a kind of comprehensive control management electricity for battery pack
Road.
Background technology
Power recharge battery needs some section Li-Ion rechargeable batteries being together in series mostly when in use, has reached required
The sufficiently large voltage wanted goes the running of drive motor；Such as electric bicycle, electric automobile etc.；Because lithium ion battery is each
Monomer can not possibly be completely the same in performance indications, in use due to the difference of the capacity between each monomer, self discharge etc.
Different, after used a period of time, the retention of charge of battery pack substantially reduces, and have impact on it and further promotes the use of；
Therefore, when more piece rechargeable battery is used in series, the quality of its performance depends not only on the quality of cell, additionally depends on
The overall performance of battery pack；Existing multiple battery management system in the market, normally referred to as BMS or protection board, but this
A little BMS protection boards do not have the ability of equalization substantially, or even all do not have this balanced function, simply play one to internal battery pack situation
Individual monitoring, electrokinetic cell super-charge super-discharge can not be control effectively and be managed.
The content of the invention
For above-mentioned the problems of the prior art, preferably solves internal battery pack it is an object of the invention to provide a kind of
When single battery core uniformity is very poor how the safe and reliable good battery pack of management, make battery occur without overcharge expansion or it is quick-fried
It is fried.
In order to solve the above technical problems, the invention provides a kind of capacitor charger system, single battery voltage acquisition
Module, the magnitude of voltage of cell is often saved in the battery pack for gathering；
Voltage comparison module, for by the voltage acquisition module export often save cell magnitude of voltage respectively with it is default
Overvoltage threshold compares, and when the magnitude of voltage of certain section cell is above or below default overvoltage threshold, then output one is right
Should in the section cell drive signal to balance charge/discharge module；
Balance charge/discharge module, be made up of several control units, respectively with the both positive and negative polarity of each section cell in battery pack
It is connected, when receiving the drive signal of the voltage comparison module block output, control unit corresponding to drive signal driving
Its corresponding cell discharge and recharge is controlled to be equal to default overvoltage threshold until the magnitude of voltage of the section cell；The equilibrium
The control unit of discharge module is made up of FET, and the source electrode of FET passes through high-power resistance and cell
One pole connects, and the drain electrode of FET directly connects with another pole of the cell；The grid of FET passes through an electricity
Resistance is connected with the over-pressed computing module, for receiving the drive signal of over-pressed computing module output.
The capacitor charger system can also include：Under-voltage computing module, for the voltage acquisition module to be exported
The magnitude of voltage for often saving cell respectively compared with default brownout threshold, when the magnitude of voltage of certain section cell is less than pre-
If brownout threshold when, then export one correspond to the section cell drive signal；Undervoltage alarm module, for according to institute
The drive signal for stating under-voltage computing module output is alarmed.
Specifically, the undervoltage alarm module is made up of several LEDs, and each LED is corresponded in the battery pack
One cell, LED corresponding to the drive signal driving of the under-voltage computing module output light to show corresponding monomer
Battery is under-voltage.
Cell electric discharge or the under-voltage monomer electricity for helping to charge over-pressed using balance charge/discharge module due to the present invention
Charge in pond so that battery, which occurs without, overcharges expansion or blast, the good battery pack of management that can be more safe and reliable.
Brief description of the drawings
Structure chart of the accompanying drawing 1 for a kind of capacitor charger system of the present invention in one embodiment；
Detailed circuit diagram of the accompanying drawing 2 for a kind of capacitor charger system of the present invention in one embodiment.
Embodiment
With reference to figure 1, a kind of capacitor charger system of the invention, it is used for being in series by more piece cell
The Comprehensive Control of battery pack 1, the circuit include：
Voltage acquisition module 2, the magnitude of voltage of cell is often saved in the battery pack 1 for gathering；It is connected in battery pack
The both positive and negative polarity of each cell to detect the current magnitude of voltage of each cell, to connect N number of cell, then have N+
1 wire is connected to voltage acquisition module,
Voltage operational module 7, for the magnitude of voltage for often saving cell that exports the voltage acquisition module respectively with it is default
Overvoltage threshold compare, when certain section cell magnitude of voltage exceed default overvoltage threshold when or it is under-voltage when, then export one
The individual drive signal corresponding to the section cell is to balanced discharge module or charging module；
Balance charge/discharge module 4, be made up of several control units, respectively with the both positive and negative polarity of each section cell in battery pack
It is connected, when receiving the drive signal of the voltage operational module output, control unit control corresponding to drive signal driving
Make its corresponding cell electric discharge or charge until the magnitude of voltage of the section cell is equal to default overvoltage threshold.Specifically
Ground, the control unit of balanced discharge module are realized that the source electrode of FET passes through high-power resistance and one by FET
One pole of cell connects, and drain electrode directly connects with another pole of the cell；The grid of FET passes through an electricity
Resistance is connected with the over-pressed computing module, for receiving the drive signal of over-pressed computing module output.
The method have the characteristics that the ability of equalization is big, it is consistent with charging current by-pass current can be reached.Utilize metal-oxide-semiconductor
Low on-resistance characteristic is as equalizer switch device, additional high-power resistance（It determines euqalizing current size）To realize balanced point
Stream.
The capacitor charger system can also include：Undervoltage alarm module 6, for defeated according to the under-voltage computing module
The drive signal gone out is alarmed.Specifically, undervoltage alarm module can be made up of several LEDs, and each LED corresponds to institute
State a cell in battery pack, LED corresponding to the drive signal driving of the under-voltage computing module output it is luminous with
Cell corresponding to showing is under-voltage.There can certainly be the equipment of warning effect with other to realize undervoltage warning.
With reference to figure 2, by the lithium battery group of four series connection into rechargeable battery set exemplified by；Voltage acquisition module 2 gathers from battery pack
Voltage signal, voltage acquisition module 2 are connected with the over-pressed computing module 3 in voltage operational module 7 and under-voltage computing module 5, mistake
Pressure computing module 3 gives the control unit 41 being made up of FET Q1, Q2, Q3, Q4 to provide driving through resistance R1, R2, R3, R4
Signal.Wherein R1, Q1 and R9 form a control unit and Balance route are carried out to No. 1 battery, and R2, Q2 and R10 form a control
Unit processed carries out Balance route to No. 2 batteries, and R3, Q3 and R11 form a control unit and carry out Balance route to No. 3 batteries,
R4, Q4 and R12 form a control unit and carry out Balance route to No. 4 batteries；Wherein metal-oxide-semiconductor Q1 S poles meet power resistor R9
One end, R9 the "-" pole of No. 1 battery of another termination namely the "+" pole of No. 2 batteries, Q1 D poles connect the "+" pole of No. 1 battery,
Metal-oxide-semiconductor Q2 S poles connect power resistor R10 one end, the R10 "-" pole of No. 2 batteries of another termination namely the "+" of No. 3 batteries
Pole, Q2 D poles connect the "-" pole of No. 1 battery of battery namely the "+" pole of No. 2 batteries, MOS pipes Q3 S poles and connect power resistor
R11 one end, R11 the "-" pole of No. 3 batteries of another termination battery namely the "+" pole of No. 4 batteries, Q3 D poles connect battery 2
The "-" pole of battery namely the "+" pole of No. 3 batteries, metal-oxide-semiconductor Q4 S poles connect power resistor R12 one end, R12 another termination electricity
The "-" pole of the battery of pond 4, Q4 D poles connect the "-" pole of No. 3 batteries of battery namely the "+" pole of No. 4 batteries.
Described metal-oxide-semiconductor Q1, Q2, Q3, Q4 are respectively used to on-off action, for example, when in No. 1 cell charging process its two
When terminal voltage exceedes certain magnitude of voltage, over-pressed computing module exports a drive signal to resistance R1 and is sent to when detecting
Q1 G poles, metal-oxide-semiconductor Q1 conductings short-circuit power resistance R9 are used for No. 1 cell and discharged, the power resistor R9, R10, R11,
R12 plays euqalizing current size adjustment effect, and the smaller euqalizing current of its resistance value is bigger, and resistance is bigger, and euqalizing current is smaller.By
The undervoltage alarm module 61 of LED1, LED2, LED3, LED4 composition is respectively used to batteries monomer battery and alarmed when under-voltage
Instruction；Such as when No. 1 cell is under-voltage, then LED1 is alarmed luminous.
The embodiments of the present invention described above are not intended to limit the scope of the present invention.It is any in the present invention
Spirit and principle within the modifications, equivalent substitutions and improvements made etc., should be included in the claim protection model of the present invention
Within enclosing.
Claims (2)
- A kind of 1. capacitor charger system, it is characterised in that including：Single battery voltage acquisition module, the magnitude of voltage of cell is often saved in the battery pack for gathering；Voltage comparison module, for by the voltage acquisition module export often save cell magnitude of voltage respectively with it is default Overvoltage threshold compares, and when the magnitude of voltage of certain section cell is above or below default overvoltage threshold, then output one is right Should in the section cell drive signal to balance charge/discharge module；Balance charge/discharge module, be made up of several control units, respectively with the both positive and negative polarity of each section cell in battery pack It is connected, when receiving the drive signal of the voltage comparison module block output, control unit corresponding to drive signal driving Its corresponding cell discharge and recharge is controlled to be equal to default overvoltage threshold until the magnitude of voltage of the section cell；The equilibrium The control unit of discharge module is made up of FET, and the source electrode of FET passes through high-power resistance and cell One pole connects, and the drain electrode of FET directly connects with another pole of the cell；The grid of FET passes through an electricity Resistance is connected with the over-pressed computing module, for receiving the drive signal of over-pressed computing module output.
- 2. capacitor charger system as claimed in claim 2, it is characterised in that：The voltage comparison module also included, Undervoltage alarm module is made up of several LEDs, and each LED corresponds to a cell in the battery pack, described to owe LED corresponding to the drive signal driving of pressure computing module output lights to show that corresponding cell is under-voltage or over-pressed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610698302.XA CN107769288A (en) | 2016-08-21 | 2016-08-21 | Capacitor charger system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610698302.XA CN107769288A (en) | 2016-08-21 | 2016-08-21 | Capacitor charger system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107769288A true CN107769288A (en) | 2018-03-06 |
Family
ID=61263321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610698302.XA Pending CN107769288A (en) | 2016-08-21 | 2016-08-21 | Capacitor charger system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107769288A (en) |
-
2016
- 2016-08-21 CN CN201610698302.XA patent/CN107769288A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180306 |
|
| WD01 | Invention patent application deemed withdrawn after publication |