CN106816902A - Capacitor charger system and digital control module - Google Patents
Capacitor charger system and digital control module Download PDFInfo
- Publication number
- CN106816902A CN106816902A CN201510851770.1A CN201510851770A CN106816902A CN 106816902 A CN106816902 A CN 106816902A CN 201510851770 A CN201510851770 A CN 201510851770A CN 106816902 A CN106816902 A CN 106816902A
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- 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
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Classifications
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- 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
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- 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
- H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
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- 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
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- 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
- H02J7/00306—Overdischarge protection
-
- 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
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a kind of capacitor charger system and digital control module, 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 of the often section 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 the drive signal of over-pressed computing module output is received, the drive signal drives corresponding control unit to control 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 circuit for battery pack.
Background technology
Power recharge battery needs to be together in series some section Li-Ion rechargeable batteries when in use mostly, and the sufficiently large voltage required for having reached goes the running of drive motor；Such as electric bicycle, electric automobile etc.；Due to lithium ion battery, 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., after used a period of time, the retention of charge of battery pack is substantially reduced, and be have impact on it and is further promoted 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 these BMS protection boards do not have the ability of equalization substantially; all do not have balanced this function even; simply play a monitoring to internal battery pack situation, it is impossible to which electrokinetic cell super-charge super-discharge is control effectively and managed.
The content of the invention
For above-mentioned the problems of the prior art, it is an object of the invention to provide a kind of more preferable solution internal battery pack single battery core uniformity it is very poor when how the safe and reliable good battery pack of management, occur without battery and overcharge expansion or explode.
In order to solve the above technical problems, the invention provides a kind of capacitor charger system and digital control module, single battery voltage acquisition module often saves the magnitude of voltage of cell in the battery pack for gathering；
Voltage comparison module, the magnitude of voltage of the often section cell for the voltage acquisition module to be exported compares with default overvoltage threshold respectively, when the magnitude of voltage of certain section cell is above or below default overvoltage threshold, then a drive signal for corresponding to the section cell to balance charge/discharge module 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 the drive signal of the voltage comparison module block output is received, the drive signal drives corresponding control unit to control its corresponding cell discharge and recharge to be equal to default overvoltage threshold until the magnitude of voltage of the section cell；The control unit of the balanced discharge module is made up of FET, and the source electrode of FET is connected by high-power resistance with a pole of a cell, and the drain electrode of FET directly connects with another pole of the cell；The grid of FET is connected by a resistance with the over-pressed computing module, the drive signal for receiving over-pressed computing module output.
The capacitor charger system and digital control module can also include：Under-voltage computing module, the magnitude of voltage of the often section cell for the voltage acquisition module to be exported compares with default brownout threshold respectively, when the magnitude of voltage of certain section cell is less than default brownout threshold, then a drive signal for corresponding to the section cell is exported；Undervoltage alarm module, the drive signal for being exported according to the under-voltage computing module is alarmed.
Specifically, the undervoltage alarm module is made up of several LEDs, a cell in each LED correspondence battery pack, and the drive signal of the under-voltage computing module output drives corresponding LED luminous under-voltage to show corresponding cell.
Using balance charge/discharge module help to charge the cell electric discharge of overvoltage due to the present invention or under-voltage cell charges so that battery occurs without and overcharges expansion or explode, the good battery pack of management that can be more safe and reliable.
Brief description of the drawings
Accompanying drawing 1 is a kind of capacitor charger system of the invention and digital control module structure chart in one embodiment；
Accompanying drawing 2 is a kind of capacitor charger system of the invention and digital control module detailed circuit diagram in one embodiment.
Specific embodiment
With reference to Fig. 1, a kind of capacitor charger system of the invention and digital control module, it is used for the Comprehensive Control to the battery pack 1 being in series by more piece cell, and the circuit includes：
Voltage acquisition module 2, often saves the magnitude of voltage of cell in the battery pack 1 for gathering；The both positive and negative polarity of each cell in its connection battery pack then has N+1 root wires to be connected to voltage acquisition module to detect the current magnitude of voltage of each cell, to connect N number of cell,
Voltage operational module 7, the magnitude of voltage of the often section cell for the 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 or when under-voltage, then a drive signal for corresponding to the section cell to balanced discharge module or charging module is exported；
Balance charge/discharge module 4, 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 the drive signal of the voltage operational module output is received, the drive signal drives corresponding control unit to control its corresponding cell electric discharge or charge until the magnitude of voltage of the section cell is equal to default overvoltage threshold.Specifically, the control unit of balanced discharge module is realized that the source electrode of FET is connected by high-power resistance with a pole of a cell by FET, and drain electrode directly connects with another pole of the cell；The grid of FET is connected by a resistance with the over-pressed computing module, the drive signal for receiving over-pressed computing module output.
The method have the characteristics that the ability of equalization is big, by-pass current can be reached consistent with charging current.By the use of the low on-resistance characteristic of metal-oxide-semiconductor as equalizer switch device, additional high-power resistance（It determines euqalizing current size）To realize balanced shunting.
The capacitor charger system and digital control module can also include：Undervoltage alarm module 6, the drive signal for being exported according to the under-voltage computing module is alarmed.Specifically, undervoltage alarm module can be made up of several LEDs, a cell in each LED correspondence battery pack, and the drive signal of the under-voltage computing module output drives corresponding LED luminous under-voltage to show corresponding cell.There can certainly be the equipment of warning effect to realize undervoltage warning with other.
With reference to Fig. 2, by four lithium battery groups of series connection into rechargeable battery set as a example by；Voltage acquisition module 2 is connected from battery pack collection voltages signal, voltage acquisition module 2 with over-pressed computing module 3 and under-voltage computing module 5 in voltage operational module 7, and over-pressed computing module 3 is given by FET Q1, Q2 through resistance R1, R2, R3, R4
, Q3, Q4 constitute control unit 41 provide drive signal.Wherein R1, Q1 and R9 constitute a control unit and carry out Balance route to No. 1 battery, R2, Q2 and R10 constitute a control unit and carry out Balance route to No. 2 batteries, R3, Q3 and R11 constitute a control unit and No. 3 batteries are carried out with Balance route, and R4, Q4 and R12 constitute a control unit and carry out Balance route to No. 4 batteries；Wherein the S poles of metal-oxide-semiconductor Q1 connect one end of power resistor R9, the "-" pole namely No. 2 "+" poles of battery of No. 1 battery of another termination of R9, the D poles of Q1 connect No. 1 "+" pole of battery, the S poles of metal-oxide-semiconductor Q2 connect one end of power resistor R10, the "-" pole namely No. 3 "+" poles of battery of No. 2 batteries of another termination of R10
The D poles of Q2 connect the "-" pole namely No. 2 "+" poles of battery of No. 1 battery of battery, MOS pipes Q3
S poles connect one end of power resistor R11, the "-" pole namely No. 4 "+" poles of battery of No. 3 batteries of another termination battery of R11, the D poles of Q3 connect the "-" pole namely No. 3 "+" poles of battery of No. 2 batteries of battery, the S poles of metal-oxide-semiconductor Q4 connect one end of power resistor R12, the "-" pole of No. 4 batteries of another termination battery of R12, the D poles of Q4 connect the "-" pole namely No. 4 "+" poles of battery of No. 3 batteries of battery.
Described metal-oxide-semiconductor Q1, Q2, Q3, Q4 are respectively used to on-off action, such as when its both end voltage exceedes certain magnitude of voltage in No. 1 cell charging process, over-pressed computing module exports a drive signal to resistance R1 and is sent to the G poles of Q1 when detecting, metal-oxide-semiconductor Q1 conducting short-circuit power resistance R9 is used for No. 1 cell electric discharge, described power resistor R9, R10, R11, R12 play euqalizing current size adjustment, the smaller euqalizing current of its resistance value is bigger, resistance is bigger, and euqalizing current is smaller.The undervoltage alarm module 61 being made up of LED1, LED2, LED3, LED4 is respectively used to batteries monomer battery and police instruction is carried out when under-voltage；Such as when No. 1 cell is under-voltage, then LED1 is alarmed luminous.
Invention described above implementation method, is not intended to limit the scope of the present invention..Any modification made within the spirit and principles in the present invention, equivalent and improvement etc., should be included within claims of the invention.
Claims (2)
1. a kind of capacitor charger system and digital control module, it is characterised in that including：
Single battery voltage acquisition module, often saves the magnitude of voltage of cell in the battery pack for gathering；
Voltage comparison module, the magnitude of voltage of the often section cell for the voltage acquisition module to be exported compares with default overvoltage threshold respectively, when the magnitude of voltage of certain section cell is above or below default overvoltage threshold, then a drive signal for corresponding to the section cell to balance charge/discharge module 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 the drive signal of the voltage comparison module block output is received, the drive signal drives corresponding control unit to control its corresponding cell discharge and recharge to be equal to default overvoltage threshold until the magnitude of voltage of the section cell；The control unit of the balanced discharge module is made up of FET, and the source electrode of FET is connected by high-power resistance with a pole of a cell, and the drain electrode of FET directly connects with another pole of the cell；The grid of FET is connected by a resistance with the over-pressed computing module, the drive signal for receiving over-pressed computing module output.
2. capacitor charger system as claimed in claim 1 and digital control module, it is characterised in that：The voltage comparison module is also made up of including over voltage alarm module several LEDs, a cell in each LED correspondence battery pack, the drive signal of the under-voltage computing module output drives corresponding LED luminous to show that corresponding cell is under-voltage or overvoltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510851770.1A CN106816902A (en) | 2015-11-28 | 2015-11-28 | Capacitor charger system and digital control module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510851770.1A CN106816902A (en) | 2015-11-28 | 2015-11-28 | Capacitor charger system and digital control module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106816902A true CN106816902A (en) | 2017-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510851770.1A Pending CN106816902A (en) | 2015-11-28 | 2015-11-28 | Capacitor charger system and digital control module |
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| CN (1) | CN106816902A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107808985A (en) * | 2017-11-21 | 2018-03-16 | 深圳市德兰明海科技有限公司 | The protection device and method of a kind of battery management system |
-
2015
- 2015-11-28 CN CN201510851770.1A patent/CN106816902A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107808985A (en) * | 2017-11-21 | 2018-03-16 | 深圳市德兰明海科技有限公司 | The protection device and method of a kind of battery management system |
| CN107808985B (en) * | 2017-11-21 | 2024-06-11 | 深圳市德兰明海新能源股份有限公司 | Protection device and method for battery management system |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170609 |
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| WD01 | Invention patent application deemed withdrawn after publication |