CN202997622U - 24V charger possessing dynamic equalization function and used in lithium iron phosphate cell - Google Patents
24V charger possessing dynamic equalization function and used in lithium iron phosphate cell Download PDFInfo
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- CN202997622U CN202997622U CN 201220683493 CN201220683493U CN202997622U CN 202997622 U CN202997622 U CN 202997622U CN 201220683493 CN201220683493 CN 201220683493 CN 201220683493 U CN201220683493 U CN 201220683493U CN 202997622 U CN202997622 U CN 202997622U
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Abstract
The utility model relates to a 24V charger possessing a dynamic equalization function and used in a lithium iron phosphate cell. The 24V charger possessing the dynamic equalization function and used in the lithium iron phosphate cell comprises a shell, and a balance switching circuit, a detection control circuit and a charging circuit are arranged in the shell. The detection control circuit comprises a microcontroller and a cell voltage detection circuit, and the microcontroller is connected with an analog switch array. The charging circuit comprises a 220 V-to-24 V conversion cell charging circuit and a 24 V-to-12 V and 5 V conversion isolation circuit; the 220 V-to-24 V conversion cell charging circuit supplies power to the microcontroller, and outputs a 24 V DC voltage to supply to the 24 V-to-12 V and 5 V conversion isolation circuit to thereby charge a cell pack; the 24 V-to-12 V and 5 V conversion isolation circuit outputs a 12V constant voltage source to supply power to the analog switch array, the balance switching circuit and the microcontroller, and outputs a 5V constant current source to supply an equalization current to the cell. The 24V charger possessing the dynamic equalization function and used in the lithium iron phosphate cell of the utility model employs a DC constant current source outputted by the isolation circuit to charge the cell, has no service life problem by being compared with a charging cell, and is safer and environment friendly; moreover, a charging current is constant and is not affected by the voltage fluctuation of the cell, so that the charging can be carried out at any time.
Description
Technical field
The utility model relates to the battery boosting technology field, specifically, relates to a kind of ferric phosphate lithium cell charger.
Background technology
As everyone knows, charger is a kind of electronic equipment that charges the battery, but the characteristic due to battery, be all the multiple batteries tandem working in the actual production life, when charging for this battery pack, general charger is the both positive and negative polarity that directly connects battery pack, give batteries charging, do not consider the characteristic situation of single battery, can badly influence the useful life of battery with this kind charger to batteries charging for a long time, especially the new type lithium ion battery such as LiFePO4.For this reason, battery pack uses battery management system (BMS) to carry out auxiliary charging, yet its balanced balanced current can't carry out effective equilibrium generally in the milliampere level to battery when using the charger charging.
Number of patent application is to disclose a kind of electrokinetic cell balance charging method and balance circuit of power battery in 201010042753.0 patent application.the electrokinetic cell balance charging method that provides in this application for a patent for invention, analyze by voltage detecting the voltage that comparison circuit detects each battery unit in battery pack in real time, and testing result is delivered to respectively balance switching circuit and power management and protection chip, balance switching circuit is to the judge of making comparisons of all voltages in testing result, find out wherein voltage lower than scheduled voltage, and this battery unit is the battery unit that in battery pack, voltage is minimum (cell), to mend battery and the connection of this battery unit by commutation circuit, this battery unit is mended electricity, when the voltage of this battery unit reaches average voltage or ceiling voltage battery scope, stop replenishing, voltage detecting analysis comparison circuit will carry out detection again, balance switching circuit determines that again another voltage is lower than scheduled voltage, and this battery unit is the battery unit that in battery pack, voltage is minimum (cell), and this battery unit is mended electricity, when the voltage of this battery unit reaches the scope of average voltage or ceiling voltage battery, stop replenishing, the like, other battery unit is charged.
The foregoing invention patent application also provides a kind of balance circuit of power battery, comprise voltage detecting analysis comparison circuit, balance switching circuit, inner constant-current source circuit (LDO) and power management and protection chip, described voltage detecting is analyzed the voltage that comparison circuit detects each battery unit in battery pack in real time, and testing result is delivered to respectively balance switching circuit and power management and protection chip; Balance switching circuit is to the judge of making comparisons of all voltages in testing result, find out wherein voltage lower than scheduled voltage, and this battery unit is the battery unit that in battery pack, voltage is minimum (cell), to mend battery and the connection of this battery unit by commutation circuit, this battery unit is mended electricity, when the voltage of this battery unit reaches the scope of average voltage or ceiling voltage battery, stop replenishing; Voltage detecting analysis comparison circuit will carry out detection again, balance switching circuit determines that again another voltage is lower than scheduled voltage, and this battery unit is the battery unit that in battery pack, voltage is minimum (cell), and this battery unit is mended electricity, when the voltage of this battery unit reaches the scope of average voltage or ceiling voltage battery, stop replenishing, the like, other battery unit is charged; Described constant-current source circuit (LDO) is for voltage detecting is analyzed comparison circuit, balance switching circuit provides power supply.
In sum as can be known, number of patent application is disclosed a kind of electrokinetic cell balance charging method and balance circuit of power battery in 201010042753.0 patent application, adopt the benefit battery to mend electricity to rechargeable battery, although can mend electricity when charging and discharging, but because the electric weight of mending battery is certain, just can not mend again electricity after use a period of time, have short problem in useful life, and easily cause the wasting of resources, affect environmental protection.
The utility model content
The purpose of this utility model is can't carry out to battery the problems referred to above such as efficient balance charging for what existing charger existed, and a kind of 24V charger of ferric phosphate lithium cell with dynamic equalization function is provided.
The technical solution of the utility model is: the utility model provides a kind of 24V charger of ferric phosphate lithium cell with dynamic equalization function, comprise housing, be arranged on balance switching circuit in housing, detect control circuit and charging circuit, detect control circuit and comprise microcontroller (MCU) and battery voltage detection circuit, microcontroller (MCU) is connected with analog switch array, is used for controlling balance switching circuit work; Charging circuit comprises that 220V turns the 24V battery charger and 24V turns 12V, 5V buffer circuit, and it is microcontroller (MCU) power supply that 220V turns the 24V battery charger, and output 24V direct voltage supplies with 24V and turn 12V, 5V buffer circuit, is batteries charging; 24V turns in 12V, 5V buffer circuit, and output 12V is constant pressure source, and with thinking analog switch array, balance switching circuit and microcontroller (MCU) power supply, output 5V is constant-current source, is used to battery that euqalizing current is provided.
preferably, described battery voltage detection circuit detects the voltage of each battery unit in battery pack in real time, and testing result is delivered to microcontroller (MCU), microcontroller (MCU) is to the judge of making comparisons of all voltages in testing result, find out the wherein minimum battery unit of voltage, microcontroller (MCU) is controlled balance switching circuit, by balance switching circuit, 24V is turned 12V, the 5V constant-current source that produces in the 5V buffer circuit and this battery unit are connected, this battery unit is mended electricity, the voltage that this battery unit detected when battery voltage detection circuit reaches average voltage or during high battery voltage range, stop replenishing, the rest may be inferred, until each battery voltage value in battery pack reaches predetermined value 3.65V, finishes battery balancedly, needs when balanced if battery voltage detection circuit detects battery pack again, and microcontroller (MCU) will again start balance switching circuit and mend electricity.
Preferably, in balance switching circuit, corresponding each battery unit all has two metal-oxide-semiconductors and battery voltage detection circuit to join, and each metal-oxide-semiconductor all is connected with a diode.
Preferably, described battery pack is that 8 independent battery series connection consist of.
The beneficial effects of the utility model are: it is that battery is mended electricity that (1) the utility model adopts the dc constant current power supply of buffer circuit output, compares with mending battery, safer without the problem in useful life, environmental protection; And mend electric current constant, and be not subjected to the impact of cell voltage fluctuation, can carry out at any time.(2) the utility model balance switching circuit is used the mode of metal-oxide-semiconductor and diode combinations, can effectively prevent battery short circuit, and is safer; (3) dual power supply uses external power source to mend electricity when external power source is arranged, use battery-poweredly when the outside can't power, and is not subjected to extraneous restriction, can be permanent battery pack is carried out equilibrium, keep battery pack to be in optimum state.(4) the utility model is simple in structure, and it is convenient to control, and volume is little, and quality is light, just with Integrated Development and application.
Description of drawings
Fig. 1 is the schematic diagram that the utility model detects control circuit.
Fig. 2 is the schematic diagram that the utility model 24V turns 12V, 5V buffer circuit.
Fig. 3 is the schematic diagram of the utility model balance switching circuit.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
A kind of 24V charger of ferric phosphate lithium cell with dynamic equalization function that the utility model provides, comprise housing, be arranged on balance switching circuit in housing, detect control circuit and charging circuit, detect control circuit and comprise microcontroller (MCU) and battery voltage detection circuit, microcontroller (MCU) is connected with analog switch array, is used for controlling balance switching circuit work; Charging circuit comprises that 220V turns the 24V battery charger and 24V turns 12V, 5V buffer circuit, and it is microcontroller (MCU) power supply that 220V turns the 24V battery charger, and output 24V direct voltage supplies with 24V and turn 12V, 5V buffer circuit, is batteries charging; 24V turns in 12V, 5V buffer circuit, and output 12V is constant pressure source, and with thinking analog switch array, balance switching circuit and microcontroller (MCU) power supply, output 5V is constant-current source, is used to battery that euqalizing current is provided.
above-mentioned battery voltage detection circuit detects the voltage of each battery unit in battery pack in real time, and testing result is delivered to microcontroller (MCU), microcontroller (MCU) is to the judge of making comparisons of all voltages in testing result, find out the wherein minimum battery unit of voltage, microcontroller (MCU) is controlled balance switching circuit, by balance switching circuit, 24V is turned 12V, the 5V constant-current source that produces in the 5V buffer circuit and this battery unit are connected, this battery unit is mended electricity, the voltage that this battery unit detected when battery voltage detection circuit reaches average voltage or during high battery voltage range, stop replenishing, the rest may be inferred, until each battery voltage value in battery pack reaches predetermined value 3.65V, finishes battery balancedly, needs when balanced if battery voltage detection circuit detects battery pack again, and microcontroller (MCU) will again start balance switching circuit and mend electricity.
Above-mentioned 220V turns the 24V battery charger and is connected with the control end of microcontroller (MCU), and be whole charger system power supply, reach when battery voltage detection circuit detects cell voltage the cut-ff voltage that predetermined value 3.65V(is the lithium phosphate battery) time, microcontroller (MCU) control is closed 220V and is turned the 24V battery charger.At this moment, the energy of whole charging system has been realized dual power supply by battery-powered, is not subjected to extraneous restriction, can be permanent battery pack is carried out equilibrium, keep battery pack to be in optimum state.
In 8 string battery pack as shown in Figure 3, in above-mentioned balance switching circuit, corresponding each battery unit all has two metal-oxide-semiconductors and battery voltage detection circuit to join, and in order to improve security performance, each metal-oxide-semiconductor all is connected with a diode, is used for preventing battery short circuit.
In above-mentioned two metal-oxide-semiconductors, one of them metal-oxide-semiconductor is the P-MOS pipe, anodal conducting when mending electricity, and a metal-oxide-semiconductor is the N-MOS pipe, negative pole conducting when mending electricity; When mending electricity, the pin of the P-MOS pipe of anodal conducting is connected with the 5V constant-current source by balance switching circuit, so just can realize the single battery unit is charged.
Claims (4)
1. ferric phosphate lithium cell 24V charger with dynamic equalization function, it is characterized in that: comprise housing, be arranged on balance switching circuit in housing, detect control circuit and charging circuit, detect control circuit and comprise microcontroller and battery voltage detection circuit, microcontroller is connected with analog switch array, is used for controlling balance switching circuit work; Charging circuit comprises that 220V turns the 24V battery charger and 24V turns 12V, 5V buffer circuit, and it is microcontroller power supply that 220V turns the 24V battery charger, and output 24V direct voltage supplies with 24V and turn 12V, 5V buffer circuit, is batteries charging; 24V turns in 12V, 5V buffer circuit, and output 12V is constant pressure source, and with thinking analog switch array, balance switching circuit and microcontroller power supply, output 5V is constant-current source, is used to battery that euqalizing current is provided.
2. the 24V charger of the ferric phosphate lithium cell with dynamic equalization function according to claim 1, it is characterized in that: described battery voltage detection circuit detects the voltage of each battery unit in battery pack in real time, and testing result is delivered to microcontroller, microcontroller is to the judge of making comparisons of all voltages in testing result, find out the wherein minimum battery unit of voltage, the microprocessor controls balance switching circuit, by balance switching circuit, 24V is turned 12V, the 5V constant-current source that produces in the 5V buffer circuit and this battery unit are connected, this battery unit is mended electricity, the voltage that this battery unit detected when battery voltage detection circuit reaches average voltage or during high battery voltage range, stop replenishing, the rest may be inferred, until each battery voltage value in battery pack reaches predetermined value 3.65V, finishes battery balancedly, needs when balanced if battery voltage detection circuit detects battery pack again, and microcontroller will again start balance switching circuit and mend electricity.
3. the described 24V charger of ferric phosphate lithium cell with dynamic equalization function of any one according to claim 1 and 2, it is characterized in that: in balance switching circuit, corresponding each battery unit all has two metal-oxide-semiconductors and battery voltage detection circuit to join, and each metal-oxide-semiconductor all is connected with a diode.
4. the 24V charger of the ferric phosphate lithium cell with dynamic equalization function according to claim 1 is characterized in that: described battery pack is that 8 independent batteries series connection consist of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220683493 CN202997622U (en) | 2012-12-12 | 2012-12-12 | 24V charger possessing dynamic equalization function and used in lithium iron phosphate cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220683493 CN202997622U (en) | 2012-12-12 | 2012-12-12 | 24V charger possessing dynamic equalization function and used in lithium iron phosphate cell |
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| Publication Number | Publication Date |
|---|---|
| CN202997622U true CN202997622U (en) | 2013-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220683493 Expired - Lifetime CN202997622U (en) | 2012-12-12 | 2012-12-12 | 24V charger possessing dynamic equalization function and used in lithium iron phosphate cell |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103036290A (en) * | 2012-12-12 | 2013-04-10 | 中国石油大学(华东) | 24 voltage (V) charger and charging method for lithium iron phosphate battery |
| CN108604811A (en) * | 2016-10-21 | 2018-09-28 | 株式会社Lg化学 | Battery balancing system and control method |
| CN108604810A (en) * | 2016-10-21 | 2018-09-28 | 株式会社Lg化学 | Device and method for providing charging voltage |
-
2012
- 2012-12-12 CN CN 201220683493 patent/CN202997622U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103036290A (en) * | 2012-12-12 | 2013-04-10 | 中国石油大学(华东) | 24 voltage (V) charger and charging method for lithium iron phosphate battery |
| CN108604811A (en) * | 2016-10-21 | 2018-09-28 | 株式会社Lg化学 | Battery balancing system and control method |
| CN108604810A (en) * | 2016-10-21 | 2018-09-28 | 株式会社Lg化学 | Device and method for providing charging voltage |
| JP2019503640A (en) * | 2016-10-21 | 2019-02-07 | エルジー・ケム・リミテッド | Cell balancing system and control method |
| EP3404794A4 (en) * | 2016-10-21 | 2019-03-13 | LG Chem, Ltd. | Cell balancing system and control method |
| US10629961B2 (en) | 2016-10-21 | 2020-04-21 | Lg Chem, Ltd. | Cell balancing system and control method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130612 |