CN201134695Y - Management circuit for lithium battery charging - Google Patents
Management circuit for lithium battery charging Download PDFInfo
- Publication number
- CN201134695Y CN201134695Y CNU2007201966503U CN200720196650U CN201134695Y CN 201134695 Y CN201134695 Y CN 201134695Y CN U2007201966503 U CNU2007201966503 U CN U2007201966503U CN 200720196650 U CN200720196650 U CN 200720196650U CN 201134695 Y CN201134695 Y CN 201134695Y
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- charge
- circuit
- battery
- management
- charge management
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- Expired - Lifetime
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The utility model discloses a lithium battery charge management circuit, which comprises a charge power supply and a charge battery, a charge management circuit is connected between the charge power supply and the charge battery, wherein the charge management circuit comprises a charge management control IC and a charge switch pipe, wherein the pin of the charge management control IC is connected with the charge switch pipe, and is connected with a power supply circuit and a discharge control circuit through a switch charge overvoltage detection circuit, and the pin of the charge management control IC is also connected with a lithium battery over-discharge over-charge voltage protection circuit. The lithium battery charge management circuit does charge management and discharge management for lithium battery through the charge management control IC, and charge voltage and current of the battery are led to be kept in a specific range, thereby a battery is guaranteed not to be damaged, and the service span of the battery is prolonged.
Description
Technical field:
The utility model relates to a kind of lithium cell charging management circuit.
Background technology:
In mobile DVD product, it has been an advantage out of question that lithium electricity battery replaces Ni-MH battery, because that lithium battery has is in light weight, volume is little, and therefore characteristics such as long service life are widely used.But lithium battery itself also has some shortcomings, as to discharging and recharging the pressure request harshness, charging voltage can not be too high, discharge voltage can not be low excessively etc., otherwise therefore battery requires in the lithium electricity batteries charging process all with permanent damage, cell voltage must remain in the assigned voltage scope, also need to control charging current in addition, thus the complete charging management system of a cover must be arranged, otherwise can't use.
Summary of the invention:
For this reason, the purpose of this utility model is to provide a kind of lithium cell charging management circuit, when being controlled at the lithium battery charge and discharge, occurs overcharging, crosses and put phenomenon, realizes the Charge Management to lithium battery, and the protection battery is not damaged.
For achieving the above object, the utility model mainly adopts following technical scheme:
A kind of lithium cell charging management circuit; comprise charge power supply and rechargeable battery; between charge power supply and rechargeable battery, be connected with charge management circuit; wherein said charge management circuit comprises Charge Management control IC and charge switch pipe; described Charge Management control IC pin is connected with the charge switch pipe; and be connected with charge/discharge control circuit with power-supplying circuit by the switched charge over-voltage detection circuit, described Charge Management control IC pin is also crossed with lithium battery and is let slip the charging voltage protective circuit and be connected.
Wherein said Charge Management control IC pin also is connected with the trickle charge circuit.
Wherein the Charge Management control IC also is connected with the charging output voltage detecting circuit by the charge switch pipe.
Wherein said Charge Management control IC is single-chip microcomputer HT46R51A.
It is the Charge Management control IC that the utility model adopts single-chip microcomputer HT46R51A, and detect realization by charging overvoltage detection, charging output voltage lithium battery is carried out the charge and discharge management, so that battery charging voltage and electric current remain in the prescribed limit, thereby guarantee that battery is not damaged, prolonged the useful life of battery.
Description of drawings:
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment:
For further setting forth principle of the present utility model, the utility model is described in further details below in conjunction with the drawings and specific embodiments.
See also Fig. 1, Fig. 1 is circuit theory diagrams of the present utility model, that Charge Management IC adopts among the figure is single-chip microcomputer HT46R51A, its pin 5 is connected with charge switch pipe (metal-oxide-semiconductor) N2 by resistance R 1 and R18, Q4, R15, Q3, Q1, thereby when detecting charging output voltage size and change charging current value big or small, thereby and reach the purpose of control charging current size with push pull mode control metal-oxide-semiconductor, metal-oxide-semiconductor then is connected with the charging output voltage detecting circuit.
Wherein Charge Management IC is by pin 6 and monolithic Charge Management IC power-supplying circuit, here monolithic Charge Management IC power-supplying circuit comprises that Q2, R6, IC1 and R11, R12 form, and 2 of Charge Management IC pin 1 and pins are connected with J1 by the LED output circuit.
Charge Management IC pin 8 is connected with over-charge of lithium battery overdischarge voltage protection circuit; described over-charge of lithium battery overdischarge voltage protection circuit mainly comprises IC4 and IC2; wherein IC4 is SOP9926; be connected with metal-oxide-semiconductor, IC2 for overcharge, overdischarge presses protection IC to be connected and to be connected with charge/discharge control circuit with the output voltage detecting circuit that charges by resistance R 23.
Charge Management IC pin 3 also is connected with the trickle charge circuit, and described trickle charge circuit comprises that resistance R 3, triode Q5, R26, R27 form.When controller detects machine is when putting while filling, and for preventing excessive charger and relevant zero device of burning out of electric current, this moment, controller can be regulated charging current in the trickle charge prescribed limit automatically.
Charge/discharge control circuit comprises chip N1, R1 and C1 and D1, D2, D3, and with the charging over-voltage detection circuit be connected, wherein in loading work, be lower than 2.4V ± 0.025V (ferric phosphate reason is during for 2.0V ± 0.025V) when detecting any one cell voltage, controller can automatically shut down battery output in 1S, output loop locking this moment, the vanishing of load both end voltage, voltage is returned to 3V and automatically terminates.
The charging over-voltage detection circuit, charging voltage to input detects, so that battery is carried out charge protection, be higher than 4.25V ± 0.025V (ferric phosphate reason is during for 3.65V ± 0.025V) when detecting any one cell voltage, controller can turn-off the charger input circuit in 1S, input circuit locking this moment, the voltage answer drops to 4V and automatically terminates; And when detecting charging voltage greater than the assigned voltage value, controller can automatically shut down charge switch (metal-oxide-semiconductor) in 100S, the output loop locking of charging this moment, and the output voltage vanishing, voltage is replied when dropping to the assigned voltage value and is automatically terminated.
More than a kind of lithium cell charging management circuit provided by the utility model is described in detail, used specific case herein principle of the present utility model and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present utility model, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.
Claims (4)
1, a kind of lithium cell charging management circuit; comprise charge power supply and rechargeable battery; between charge power supply and rechargeable battery, be connected with charge management circuit; it is characterized in that described charge management circuit comprises Charge Management control IC and charge switch pipe; described Charge Management control IC pin is connected with the charge switch pipe; and be connected with charge/discharge control circuit with power-supplying circuit by the switched charge over-voltage detection circuit, described Charge Management control IC pin is also crossed with lithium battery and is let slip the charging voltage protective circuit and be connected.
2, lithium cell charging management circuit according to claim 1 is characterized in that described Charge Management control IC pin also is connected with the trickle charge circuit.
3, lithium cell charging management circuit according to claim 1 is characterized in that the Charge Management control IC also is connected with the charging output voltage detecting circuit by the charge switch pipe.
4, lithium cell charging management circuit according to claim 1 is characterized in that described Charge Management control IC is single-chip microcomputer HT46R51A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201966503U CN201134695Y (en) | 2007-12-28 | 2007-12-28 | Management circuit for lithium battery charging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201966503U CN201134695Y (en) | 2007-12-28 | 2007-12-28 | Management circuit for lithium battery charging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201134695Y true CN201134695Y (en) | 2008-10-15 |
Family
ID=40062965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201966503U Expired - Lifetime CN201134695Y (en) | 2007-12-28 | 2007-12-28 | Management circuit for lithium battery charging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201134695Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104852418A (en) * | 2014-12-19 | 2015-08-19 | 北汽福田汽车股份有限公司 | Method and system preventing over-discharge of battery during charging process |
| CN105978064A (en) * | 2016-05-09 | 2016-09-28 | 深圳珈伟光伏照明股份有限公司 | Self-locking battery over-discharge over-charge protection circuit and lamp |
| WO2018099357A1 (en) * | 2016-11-30 | 2018-06-07 | 比亚迪股份有限公司 | Overcharge protection circuit and overdischarge protection circuit for power battery |
-
2007
- 2007-12-28 CN CNU2007201966503U patent/CN201134695Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104852418A (en) * | 2014-12-19 | 2015-08-19 | 北汽福田汽车股份有限公司 | Method and system preventing over-discharge of battery during charging process |
| CN104852418B (en) * | 2014-12-19 | 2017-12-08 | 北汽福田汽车股份有限公司 | It is a kind of to prevent from crossing the method and system put when battery charges |
| CN105978064A (en) * | 2016-05-09 | 2016-09-28 | 深圳珈伟光伏照明股份有限公司 | Self-locking battery over-discharge over-charge protection circuit and lamp |
| CN105978064B (en) * | 2016-05-09 | 2018-10-16 | 深圳珈伟光伏照明股份有限公司 | A kind of self-locking battery, which is crossed, puts overcharge protection circuit and lamps and lanterns |
| WO2018099357A1 (en) * | 2016-11-30 | 2018-06-07 | 比亚迪股份有限公司 | Overcharge protection circuit and overdischarge protection circuit for power battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHENZHEN DOKOCOM ENERGY TECHNOLOGY CO., LTD. Free format text: FORMER NAME: SHENZHEN VIRTUE POWER TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 518000 B3 building, 3 industrial zone, new street and neighborhood committee, Fuyong, Shenzhen, Baoan District, Guangdong Patentee after: SHENZHEN DOKOCOM ENERGY TECHNOLOGY CO., LTD. Address before: 518000 B3 building, 3 industrial zone, new street and neighborhood committee, Fuyong, Shenzhen, Baoan District, Guangdong Patentee before: Shenzhen Virtue Power Technology Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081015 |