CN114243865A - Lithium battery heating management circuit supporting reverse connection protection function - Google Patents
Lithium battery heating management circuit supporting reverse connection protection function Download PDFInfo
- Publication number
- CN114243865A CN114243865A CN202210026764.2A CN202210026764A CN114243865A CN 114243865 A CN114243865 A CN 114243865A CN 202210026764 A CN202210026764 A CN 202210026764A CN 114243865 A CN114243865 A CN 114243865A
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- junction
- current
- limiting resistor
- diode
- heating
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 57
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 23
- 239000003990 capacitor Substances 0.000 claims description 11
- 230000000087 stabilizing effect Effects 0.000 description 9
- 238000004891 communication Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
Images
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
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
- H02J7/00038—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange using passive battery identification means, e.g. resistors or capacitors
- H02J7/00041—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange using passive battery identification means, e.g. resistors or capacitors in response to measured battery parameters, e.g. voltage, current or temperature profile
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
-
- 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
- H02J7/00309—Overheat or overtemperature 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
- H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
- H02J7/0045—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction concerning the insertion or the connection of the batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a lithium battery heating management circuit supporting a reverse connection protection function, which comprises a P-channel MOSFET, a pull-up resistor, a first current-limiting resistor, a second current-limiting resistor, a third current-limiting resistor, a voltage-stabilizing diode, a photoelectric coupler and a heating plate, wherein the P-channel MOSFET is connected with the pull-up resistor; a P junction of a diode in the photoelectric coupler is electrically connected with a first current-limiting resistor, the first current-limiting resistor is connected with a power supply, and an N junction is connected with a heating control input signal through a third current-limiting resistor; a half triode C junction in the photoelectric coupler is electrically connected with the MOSFET G pole through a second current-limiting resistor; the S pole is connected with the positive pole of the base station power supply; the D pole is electrically connected with the heating sheet; the half triode E junction and the heating plate in the photoelectric coupler are connected with the diode P junction; the N junction of the diode is connected with the cathode of the base station power supply. When the battery is reversely connected with the positive electrode and the negative electrode of the switching power supply on the base station, the heating sheet cannot be burnt, and the battery heating management system is still controlled even if the battery is reversely connected.
Description
Technical Field
The invention belongs to the field of design of a lithium battery management system of a communication base station, and particularly relates to a lithium battery heating management circuit supporting a reverse connection protection function.
Background
The regional factory that communication base station distributes is extensive, the application scene is also the diverse, there is the perennial temperature relative ratio in some areas lower, but because the operating temperature of lithium cell is not too outstanding when microthermal, especially in microthermal time, still can probably take place to analyse the serious consequence of lithium, this potential safety hazard that is more serious just can appear, so generally need preheat the lithium cell when the subzero temperature and just can carry out fine charge-discharge, this just needs battery management system can carry out temperature identification judgement to external environment, can heat the management to the battery when discerning the temperature ratio lower, make the battery can better safer charge-discharge.
For a lithium battery of a communication base station, self-heating management of the lithium battery can be basically supported at present, but because the lithium battery is frequently connected reversely in the installation process, a battery heating management system is not controlled after the battery is connected reversely, and if the battery heating management system is not found, a heating sheet of the battery heating management system is burnt.
Disclosure of Invention
In view of the above, the present invention is intended to provide a lithium battery heating management circuit supporting a reverse connection protection function, which will not cause the heating sheet to burn out even if the battery is connected reversely to the positive and negative electrodes of the switching power supply on the base station, and ensure that the battery heating management system is still controlled even if the battery is connected reversely.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a lithium battery heating management circuit supporting a reverse connection protection function comprises a P-channel MOSFET, a pull-up resistor, a first current-limiting resistor, a second current-limiting resistor, a third current-limiting resistor, a voltage-stabilizing diode, a photoelectric coupler and a heating plate; a diode P junction in the photoelectric coupler is electrically connected with a first current-limiting resistor, and the first current-limiting resistor is connected with a power supply; a diode N junction in the photoelectric coupler is connected with a heating control input end through a third current limiting resistor; a half triode C junction in the photoelectric coupler is electrically connected with the G pole of the P-channel MOSFET through a second current-limiting resistor; the S pole of the P channel type MOSFET is connected with the positive pole of the base station power supply; the D pole of the P channel type MOSFET is electrically connected with the heating sheet; a half triode E junction and the heating plate in the photoelectric coupler are connected with a P junction of the diode; and the N junction of the diode is connected with the cathode of the base station power supply.
Further, a diode P junction in the photoelectric coupler is also electrically connected with a filter capacitor, and the filter capacitor is grounded.
Furthermore, the G pole of the P-channel MOSFET is also electrically connected with the P junction of the voltage stabilizing diode and a pull-up resistor, and the other ends of the N junction of the voltage stabilizing diode and the pull-up resistor are connected with the anode of the base station power supply.
Further, the first current limiting resistor is connected with a power supply by 3.3V.
The invention has the following beneficial effects: when the battery is reversely connected with the positive electrode and the negative electrode of the switching power supply on the base station, the heating sheet cannot be burnt, and the battery heating management system is still controlled even if the battery is reversely connected.
Drawings
Fig. 1 is a schematic diagram of a lithium battery heating management circuit supporting a reverse connection protection function according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating temperature detection and heating signal output control of a lithium battery heating management for a communication base station;
wherein, 1 is a P channel type MOSFET, 2 is a pull-up resistor, 3 is a first current limiting resistor, 4 is a second current limiting resistor, 5 is a voltage stabilizing diode, 6 is a diode, 7 is a filter capacitor, 8 is a photoelectric coupler, 9 is a heating plate, and 10 is a third current limiting resistor.
Detailed Description
So that the manner in which the features and aspects of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to embodiments, some of which are illustrated in the appended drawings.
The invention relates to a lithium battery heating management circuit supporting a reverse connection protection function, which comprises a P-channel MOSFET, a pull-up resistor, a first current-limiting resistor, a second current-limiting resistor, a third current-limiting resistor, a voltage-stabilizing diode, a photoelectric coupler and a heating plate, wherein the P-channel MOSFET is connected with the pull-up resistor; a diode P junction in the photoelectric coupler is electrically connected with a first current-limiting resistor, and the first current-limiting resistor is connected with a power supply; a diode N junction in the photoelectric coupler is connected with a heating control input end through a third current limiting resistor; a half triode C junction in the photoelectric coupler is electrically connected with the G pole of the P-channel MOSFET through a second current-limiting resistor; the S pole of the P channel type MOSFET is connected with the positive pole of the base station power supply; the D pole of the P channel type MOSFET is electrically connected with the heating sheet; a half triode E junction and the heating plate in the photoelectric coupler are connected with a P junction of the diode; and the N junction of the diode is connected with the cathode of the base station power supply.
Preferably, the first current limiting resistor is connected with a power supply at 3.3V.
The diode P junction in the photoelectric coupler is electrically connected with the first current-limiting resistor, so that the diode of the photoelectric coupler is protected from being burnt out.
After the battery is reversely connected with the positive electrode and the negative electrode of the switching power supply on the base station, the current can be cut off from passing through due to the unidirectional conductivity of the diode, so that no current can pass through the heating sheet, and the heating sheet cannot be burnt.
Further, a diode P junction in the photoelectric coupler is also electrically connected with a filter capacitor, and the filter capacitor is grounded to play a role in filtering.
Furthermore, the G pole of the P-channel MOSFET is also electrically connected with the P junction of the voltage stabilizing diode and a pull-up resistor, and the other ends of the N junction of the voltage stabilizing diode and the pull-up resistor are connected with the anode of the base station power supply.
The voltage stabilizing diode can prevent high voltage from entering and protect the MOSFET; the pull-up resistor is used for pulling up the level to prevent the malfunction of the MOSFET.
Fig. 1 is a schematic diagram of a lithium battery heating management circuit supporting a reverse connection protection function according to an embodiment of the present invention, and fig. 2 is a schematic diagram of temperature detection and heating signal output control for heating management of a lithium battery for a communication base station; referring to fig. 1 and 2, a lithium battery heating management circuit supporting a reverse connection protection function in this embodiment includes a P-channel MOSFET1, a pull-up resistor 2, a first current-limiting resistor 3, a second current-limiting resistor 4, a third current-limiting resistor 10, a zener diode 5, a diode 6, a filter capacitor 7, a photocoupler 8, and a heating plate 9; a diode P junction in the photoelectric coupler 8 is electrically connected with a first current-limiting resistor 3 and a filter capacitor 7, the first current-limiting resistor 3 is connected with a power supply 3.3V, and the filter capacitor 7 is grounded; a diode N junction in the photoelectric coupler 8 is connected with a heating control input signal through a third current limiting resistor 10; a half triode C junction in the photoelectric coupler 8 is electrically connected with a G pole of the P channel type MOSFET1 through a second current limiting resistor 4; the G pole of the P channel type MOSFET1 is also electrically connected with the P junction of the voltage stabilizing diode 5 and the pull-up resistor 2, and the other ends of the N junction of the voltage stabilizing diode 5 and the pull-up resistor 2 are connected with the anode P + of the base station power supply; the S pole of the P channel type MOSFET1 is connected with the positive pole P + of the base station power supply; the D pole of the P-channel MOSFET1 is electrically connected to the heater chip 9; a half triode E junction in the photoelectric coupler 8 and the heating plate 9 are connected with a P junction of the diode 6; the N junction of the diode 6 is connected with the negative pole P-of the base station power supply.
When the battery is in a low-temperature environment, if the ambient temperature is lower than 0 ℃ (the temperature can be set by the upper computer of the battery management system), the battery management system BMS can receive the input of the ambient temperature detection signal, and the presence or absence of the HEAT _ ON signal (heating control input signal) is controlled by whether the detected ambient temperature is lower than a set temperature value or not.
When the temperature is too low, the BMS outputs a HEAT _ ON signal, the HEAT _ ON signal is at a high level before a heating program is not started, the HEAT is converted into a low level after the heating is started, so that a 3.3V signal is introduced into a diode in the photoelectric coupler to emit light, the first current limiting resistor 3 plays a role in limiting current to protect the diode of the photoelectric coupler from being burnt out, the filter capacitor 7 plays a role in filtering, after the diode in the photoelectric coupler 8 emits light, a half triode in the photoelectric coupler can be converted into a conducting state from a disconnecting state, so that a G electrode of a P channel type MOSFET is pulled down to a low level state from a high level state, the second current limiting resistor 4, the pull-up resistor 2 and the voltage stabilizing diode 5 HEAT a heating piece by a positive electrode and a negative electrode of a power supply of a base station when the P channel type MOSFET is changed into a conducting state, and the temperature of the battery is increased. Because the diode has the characteristic of unidirectional conduction, when the normal wiring starts the heating function of the battery, the current passes through the diode in the forward direction, so the battery can work normally, but if the battery is reversely connected with the anode and the cathode of the switching power supply on the base station, if the diode is not arranged, the current passes through the parasitic diode in the P-channel MOSFET and continuously heats the heating sheet all the time, so the control cannot be realized, and finally the heating sheet is burnt, even the battery has the risk of fire.
The specific type of the above-mentioned devices is not limited and detailed, and the deep connection mode of the above-mentioned devices is not detailed, and can be understood by those skilled in the art as the common general knowledge.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. that are within the spirit and principle of the present invention should be included in the present invention.
Claims (4)
1. A lithium battery heating management circuit supporting a reverse connection protection function is characterized by comprising a P-channel MOSFET, a pull-up resistor, a first current-limiting resistor, a second current-limiting resistor, a third current-limiting resistor, a voltage-stabilizing diode, a photoelectric coupler and a heating plate; a diode P junction in the photoelectric coupler is electrically connected with a first current-limiting resistor, and the first current-limiting resistor is connected with a power supply; a diode N junction in the photoelectric coupler is connected with a heating control input end through a third current limiting resistor; a half triode C junction in the photoelectric coupler is electrically connected with the G pole of the P-channel MOSFET through a second current-limiting resistor; the S pole of the P channel type MOSFET is connected with the positive pole of the base station power supply; the D pole of the P channel type MOSFET is electrically connected with the heating sheet; a half triode E junction and the heating plate in the photoelectric coupler are connected with a P junction of the diode; and the N junction of the diode is connected with the cathode of the base station power supply.
2. The heating management circuit for the lithium battery supporting the reverse connection protection function as claimed in claim 1, wherein the diode P junction in the photoelectric coupler is further electrically connected with a filter capacitor, and the filter capacitor is grounded.
3. The lithium battery heating management circuit supporting the reverse connection protection function according to claim 1, wherein the G pole of the P channel type MOSFET is further electrically connected with a P junction of a voltage regulator diode and a pull-up resistor, and the other end of the N junction of the voltage regulator diode and the pull-up resistor are connected with the anode of the base station power supply.
4. The lithium battery heating management circuit supporting the reverse connection protection function as claimed in claim 1, wherein the first current limiting resistor is connected with a power supply of 3.3V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210026764.2A CN114243865A (en) | 2022-01-11 | 2022-01-11 | Lithium battery heating management circuit supporting reverse connection protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210026764.2A CN114243865A (en) | 2022-01-11 | 2022-01-11 | Lithium battery heating management circuit supporting reverse connection protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114243865A true CN114243865A (en) | 2022-03-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210026764.2A Pending CN114243865A (en) | 2022-01-11 | 2022-01-11 | Lithium battery heating management circuit supporting reverse connection protection function |
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| CN (1) | CN114243865A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201398070Y (en) * | 2009-05-06 | 2010-02-03 | 厦门拓宝科技有限公司 | Circuit preventing polarity of accumulator from reverse connection |
| CN101710631A (en) * | 2009-12-16 | 2010-05-19 | 奇瑞汽车股份有限公司 | Heating device for lithium ion power battery |
| CN104104153A (en) * | 2014-06-30 | 2014-10-15 | 安徽国科电力设备有限公司 | Simple and reliable energy storage power supply circuit |
| CN106125618A (en) * | 2016-07-29 | 2016-11-16 | 中车大连电力牵引研发中心有限公司 | Digital signal acquiring circuit, digital signal acquiring board |
| CN106655332A (en) * | 2016-10-27 | 2017-05-10 | 江苏科技大学 | Power supply short-circuit-prevention protection system |
-
2022
- 2022-01-11 CN CN202210026764.2A patent/CN114243865A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201398070Y (en) * | 2009-05-06 | 2010-02-03 | 厦门拓宝科技有限公司 | Circuit preventing polarity of accumulator from reverse connection |
| CN101710631A (en) * | 2009-12-16 | 2010-05-19 | 奇瑞汽车股份有限公司 | Heating device for lithium ion power battery |
| CN104104153A (en) * | 2014-06-30 | 2014-10-15 | 安徽国科电力设备有限公司 | Simple and reliable energy storage power supply circuit |
| CN106125618A (en) * | 2016-07-29 | 2016-11-16 | 中车大连电力牵引研发中心有限公司 | Digital signal acquiring circuit, digital signal acquiring board |
| CN106655332A (en) * | 2016-10-27 | 2017-05-10 | 江苏科技大学 | Power supply short-circuit-prevention protection system |
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| PB01 | Publication | ||
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Application publication date: 20220325 |