CN213341687U - Intelligent power lithium battery circuit for automobile - Google Patents
Intelligent power lithium battery circuit for automobile Download PDFInfo
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- CN213341687U CN213341687U CN202021984066.6U CN202021984066U CN213341687U CN 213341687 U CN213341687 U CN 213341687U CN 202021984066 U CN202021984066 U CN 202021984066U CN 213341687 U CN213341687 U CN 213341687U
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 80
- 238000007599 discharging Methods 0.000 claims abstract description 19
- 230000002265 prevention Effects 0.000 claims abstract description 5
- 239000003990 capacitor Substances 0.000 claims description 39
- 238000005070 sampling Methods 0.000 claims description 13
- 101100435119 Arabidopsis thaliana APRR1 gene Proteins 0.000 claims description 3
- 101100435120 Arabidopsis thaliana APRR2 gene Proteins 0.000 claims description 3
- 101100481792 Schizosaccharomyces pombe (strain 972 / ATCC 24843) toc1 gene Proteins 0.000 claims description 3
- 229910044991 metal oxide Inorganic materials 0.000 claims description 3
- 150000004706 metal oxides Chemical class 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 5
- 230000017105 transposition Effects 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 10
- 102100034930 Protein mono-ADP-ribosyltransferase PARP9 Human genes 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 101000613615 Homo sapiens Protein mono-ADP-ribosyltransferase PARP14 Proteins 0.000 description 1
- 101000613620 Homo sapiens Protein mono-ADP-ribosyltransferase PARP15 Proteins 0.000 description 1
- 101000735459 Homo sapiens Protein mono-ADP-ribosyltransferase PARP9 Proteins 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 102100040848 Protein mono-ADP-ribosyltransferase PARP14 Human genes 0.000 description 1
- 102100040846 Protein mono-ADP-ribosyltransferase PARP15 Human genes 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
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Abstract
The utility model discloses an automobile intelligence power lithium cell circuit, prevent tying over-current protection circuit, overcharge voltage protection circuit, overdischarge voltage protection circuit and main control chip including a plurality of lithium cell access circuits, charge-discharge, wherein: the charging and discharging reverse connection prevention over-current protection circuit is connected to an input CO pin and an output DO pin of the main control chip through an over-charging voltage protection circuit and an over-discharging voltage protection circuit. The utility model discloses a lithium battery circuit is charging the transposition, and the overcharge or discharge cross-discharge can all be protected circuit and lithium cell in the charging process, has improved the stability and the life of lithium cell greatly.
Description
Technical Field
The utility model relates to a lithium cell field, concretely relates to car intelligence power lithium cell circuit.
Background
China has become the biggest new energy automobile market in the world. According to statistics, the yield and sales of the Chinese new energy automobile in 2016 are respectively 51.7 ten thousand and 50.7 ten thousand, and the yield and sales are respectively increased by 51.7% and 53% on the same scale. In 10 months before 2017, the sales volume of new energy automobiles in China reaches 49 thousands, and the sales volume in the whole year is expected to break through 70 thousands. The power lithium battery is taken as the most central key part, and the related technology of the power lithium battery must be adapted to the development of electric automobiles. How far the new energy automobile can travel depends on how far the power lithium battery can travel. By integrating the technical advantages and development trends of various lithium batteries, the lithium ion lithium battery can be more and more widely applied to the fields of hybrid electric vehicles, plug-in hybrid electric vehicles and pure electric vehicles. The lithium battery technology has great significance for the development of new energy automobile industry.
From the current technical perspective, the conventional automobile power lithium battery still has a lot of defects, for example, the discharge reverse connection prevention overcurrent protection, the overcharge voltage protection circuit and the overdischarge voltage protection circuit of the lithium battery are not perfect enough, the charge guarantee time is often caused, and the stability and the service life of the lithium battery are greatly influenced.
Therefore, further improvement of the existing power lithium battery is needed, and the power current overcurrent discharge anti-reverse connection overcurrent protection, the overcharge voltage protection circuit and the overdischarge voltage protection are mainly controlled by an electronic circuit, so that further improvement of the existing power lithium battery is needed.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides an automobile intelligence power lithium battery circuit can realize overflowing discharging to carrying on the electric current and prevent that the transposition overflows protection, overcharge voltage protection circuit and overdischarge voltage protection, improves the stability of lithium cell greatly, improves the practical life of lithium cell.
In order to achieve the purpose, the utility model adopts the following technical scheme: the utility model provides an automobile intelligent power lithium battery circuit, includes that a plurality of lithium batteries access circuit, charge-discharge are prevented reverse connection and are flowed protection circuit, overcharge voltage protection circuit, overdischarge voltage protection circuit and main control chip, wherein:
the charging and discharging reverse connection prevention over-current protection circuit is connected to an input CO pin and an output DO pin of the main control chip through an over-charging voltage protection circuit and an over-discharging voltage protection circuit;
the charge-discharge anti-reverse-connection overcurrent protection circuit comprises an amplifier P1, VDD of the amplifier is connected with a lithium battery anode P + A of a protection board, GND of the amplifier P1 is connected with a lithium battery cathode P-of the protection board, an IN + pin of the amplifier P1 is connected with a resistor R38, the other end of the resistor R38 is connected with a source electrode of an MOS tube Q8, a drain electrode of the MOS tube Q8 is connected with a special charging terminal P-B, and a grid electrode of the MOS tube Q8 is connected with a GND pin of an amplifier P1 through a resistor R44;
the overcharge voltage protection circuit comprises MOS tubes Q6 and Q7, wherein the source electrode of the MOS tube Q6 is connected with a GND pin of an amplifier P1, the grid electrode of the MOS tube Q6 is connected with an input CO pin of a main control chip, and the drain electrode of the MOS tube Q7 is connected with the drain electrode of the MOS tube Q7; the source electrode of the MOS tube Q7 is connected with a GND lead of an amplifier P1, and the grid electrode of the MOS tube Q7 is connected with an output DO pin of the main control chip;
the over-discharge voltage protection circuit comprises a plurality of sampling resistors, a resistor R19 and a capacitor C11, wherein the sampling resistors are connected in parallel to form a merging branch A end and a merging branch B end, one branch of the merging branch A end is connected with VIN of the main control chip through the capacitor C11, and the other branch is directly connected with a GND pin of the main control chip; and the B end of the merging branch is connected with an output DO pin of the main control chip through a resistor R19.
Preferably, the model of the main control chip is HDS-BN, and the model of the amplifier P1 is LM 358.
Preferably, the lithium battery access circuit comprises a lithium battery BTn, a small resistor, a middle resistor, a large resistor, an MOS (metal oxide semiconductor) tube and a capacitor, wherein one end of the small resistor is connected with the anode of the lithium battery BTn, and the other end of the small resistor is connected with the drain of the MOS tube; one branch of a source electrode of the MOS tube is directly connected with a negative electrode of a lithium battery BTn, and the other branch of the source electrode of the MOS tube is connected with a VCn pin of a main control chip through a middle resistor; the grid electrode of the MOS tube is connected with a BALn pin of the main control chip; one end of the capacitor is connected with the source electrode of the MOS tube through the middle resistor, and the other end of the capacitor is directly connected with the GND pin of the main control chip.
Preferably, the small resistance is 150 ohms, the medium resistance is 1K ohms, and the large resistance is 10M ohms.
Preferably, the sampling resistors comprise resistors R24-R3310, and the resistance values of the 10 sampling resistors are the same.
Preferably, the VM pin of the main control chip is sequentially connected to the resistor R15, the forward direction of the diode D2, the resistor R7, and the base of the transistor Q2, and the collector of the transistor Q2 is connected to the VM pin of the main control chip.
Preferably, the THR pin of the main control chip is sequentially connected with a resistor R7 and a resistor R8, and the resistor R8 is further connected with the base stage of the transistor Q2.
Preferably, the NTC pin of the main control chip is sequentially connected with a thermistor and a resistor R8, and the resistor R8 is connected with the base of the transistor Q2.
Preferably, the TOC2 pin of the main control chip is sequentially connected with a capacitor C8 and a resistor R8, and the resistor R8 is further connected with the base of the transistor Q2.
Preferably, as the TOC1 pin of the main control chip is sequentially connected with a capacitor C7 and a resistor R8, the resistor R8 is further connected with the base stage of a transistor Q2;
the TOVD pin of the main control chip is sequentially connected with a capacitor C6 and a resistor R8;
the TOV pin of the main control chip is sequentially connected with a capacitor C5 and a resistor R8, the resistor R8 is connected with the base level of a triode Q2, the resistor R8 is connected with a capacitor C11 in parallel, one end of a capacitor C11 is connected with the base level of the triode Q2, and the other end of the capacitor C5; the emitter of the transistor Q2 is also connected to the capacitor C5.
The utility model discloses profitable technological effect: the utility model discloses a lithium battery circuit is provided with the electric current and overflows discharge and prevents that it overflows overcurrent protection, cross charge voltage protection circuit and overdischarge voltage protection circuit and main control chip to connect, and the reversal that charges all can protect circuit and lithium cell if the overcharge or discharge is crossed in the charging process, has improved the stability and the life of lithium cell greatly.
Drawings
Fig. 1 is the utility model relates to an electronic circuit schematic diagram of car intelligence power lithium cell circuit.
Fig. 2 is the utility model relates to a partial electronic circuit schematic diagram of car intelligence power lithium cell circuit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments, but the scope of the present invention is not limited to the following specific embodiments.
As shown in fig. 1-2, an intelligent power lithium battery circuit for an automobile comprises a plurality of lithium battery access circuits, a charging and discharging reverse-connection-prevention overcurrent protection circuit, an overcharge voltage protection circuit, an overdischarge voltage protection circuit and a main control chip, wherein:
after being connected in parallel, a plurality of lithium Battery access circuits are respectively accessed to VCn, BALN and GND pins corresponding to the main control chip, n is a positive integer, and the value of n in the embodiment is 4, namely 4 lithium batteries, namely BT1, BT2, BT3 and BT4, are accessed in parallel in the circuit. Specifically, as shown in the figure, two ends of BT1 are respectively connected to VC5 and BAL4 of the main control chip, BT2 is connected to VC4 and BAL3 of the main control chip, and so on, BT3 is connected to VC3 and BAL2 of the main control chip, BT4 is connected to VC2 and BAL1 of the main control chip, that is, a lithium battery BT is respectively connected to a VC and BAL pin of the main control chip, and they are not overlapped or crossed, and the numbers of the lithium battery and the pin can be arranged according to specific situations.
Specifically, the lithium battery access circuit comprises a lithium battery BTn, a small resistor, a middle resistor, a large resistor, an MOS (metal oxide semiconductor) tube and a capacitor, wherein one end of the small resistor is connected with the anode of the lithium battery BTn, and the other end of the small resistor is connected with the drain of the MOS tube; one branch of a source electrode of the MOS tube is directly connected with a negative electrode of a lithium battery BTn, and the other branch of the source electrode of the MOS tube is connected with a VCn pin of a main control chip through a middle resistor; the grid electrode of the MOS tube is connected with a BALn pin of the main control chip; one end of the capacitor is connected with the source electrode of the MOS tube through the middle resistor, and the other end of the capacitor is directly connected with the GND pin of the main control chip.
Preferably, the small resistance is 150 ohms, the medium resistance is 1K ohms, and the large resistance is 10M ohms.
The charging and discharging reverse connection prevention overcurrent protection circuit is connected to an input CO pin and an output DO pin of the main control chip through an overcharge voltage protection circuit and an overdischarge voltage protection circuit;
specifically, the charge-discharge anti-reverse-connection overcurrent protection circuit comprises an amplifier P1, the VDD end of the amplifier is connected with the anode P + A of the lithium battery of the protection board, the GND end of the amplifier P1 is connected with the cathode P-of the lithium battery of the protection board, the IN + pin of the amplifier P1 is connected with a resistor R38, the other end of the resistor R38 is connected with the source electrode of a MOS transistor Q8, the drain electrode of the MOS transistor Q8 is connected with a special charging terminal P-B, and the grid electrode of the MOS transistor Q8 is connected with the GND pin of the amplifier P1 through the resistor R44.
The overcharge voltage protection circuit comprises MOS tubes Q6 and Q7, wherein the source electrode of the MOS tube Q6 is connected with a GND pin of an amplifier P1, the grid electrode of the MOS tube Q6 is connected with an input CO pin of a main control chip, and the drain electrode of the MOS tube Q7 is connected with the drain electrode of the MOS tube Q7; the source of the MOS tube Q7 is connected with the GND lead of the amplifier P1, and the grid is connected with the output DO pin of the main control chip.
The over-discharge voltage protection circuit comprises a plurality of sampling resistors, a resistor R19 and a capacitor C11, wherein the sampling resistors are connected in parallel to form a merging branch A end and a merging branch B end, one branch of the merging branch A end is connected with VIN of the main control chip through the capacitor C11, and the other branch is directly connected with a GND pin of the main control chip; and the B end of the merging branch is connected with an output DO pin of the main control chip through a resistor R19. The model of the main control chip is HDS-BN, and the model of the amplifier P1 is LM 358.
Preferably, the sampling resistors comprise resistors R24-R3310, and the resistance values of the 10 sampling resistors are the same.
Preferably, the VM pin of the main control chip is sequentially connected to the resistor R15, the forward direction of the diode D2, the resistor R7, and the base of the transistor Q2, and the collector of the transistor Q2 is connected to the VM pin of the main control chip.
The THR pin of the main control chip is sequentially connected with a resistor R7 and a resistor R8, and the resistor R8 is connected with the base level of the triode Q2.
The NTC pin of the main control chip is sequentially connected with a thermistor and a resistor R8, and the resistor R8 is connected with the base level of a triode Q2.
The TOC2 pin of the main control chip is sequentially connected with a capacitor C8 and a resistor R8, and the resistor R8 is connected with the base level of a triode Q2.
The TOC1 pin of the main control chip is sequentially connected with a capacitor C7 and a resistor R8, and the resistor R8 is connected with the base level of a triode Q2;
the TOVD pin of the main control chip is sequentially connected with a capacitor C6 and a resistor R8;
the TOV pin of the main control chip is sequentially connected with a capacitor C5 and a resistor R8, the resistor R8 is connected with the base level of a triode Q2, the resistor R8 is connected with a capacitor C11 in parallel, one end of a capacitor C11 is connected with the base level of the triode Q2, and the other end of the capacitor C5; the emitter of the transistor Q2 is also connected to the capacitor C5.
The utility model discloses working process and function as follows:
1: overcharge voltage protection
The overvoltage protection voltage of the circuit is 15.4V, the precision is +/-25 MV, when the charging voltage is higher than 15.4V, the CO pin of the main control chip outputs low level, the charging input is turned off, the discharging channel is opened when the charging MOS tube Q6 is turned off, uninterrupted output is guaranteed, when the voltage of the lithium battery is lower than 15V, the charging channel recovers, and the CO pin of the main control chip outputs high level.
Over-discharge voltage protection
When the lithium battery continuously discharges, the discharging channel is closed when the voltage of the lithium battery reaches 8V, the DO pin of the main control chip outputs a low level, the charging channel is opened at the moment to charge the lithium battery, when the voltage of the lithium battery rises to 10V, the discharging channel is opened, and the DO pin outputs a high level.
And 3, discharging overcurrent protection.
In this embodiment, the comparison voltage of the detection port VIN of the main control chip is set to 0.1V, when the maximum discharge current of the lithium battery is 400A, the feedback voltage of the sampling resistor is set to 0.096V, and when the detection voltage is greater than 0.1V and the duration is greater than 0.1MS, the DO pin of the main control chip outputs a low level, turns off the output, and is locked. And the pin of the main control chip VM is changed into a high level, the system is unlocked after 10 seconds, the pin of the control chip VM is forcibly pulled to a low level, and the pin of the control chip DO outputs the high level to recover power supply.
4 charging overcurrent protection
In the implementation, the charging overcurrent detection voltage is set to be-0.05V, the main control chip performs internal detection, when the charging overcurrent detection voltage exceeds 0.05V, charging current is excessively protected, a charging channel is turned off, a CO pin of the main control chip outputs low level, and the charger can be recovered only by pulling out the charger.
Short-circuit protection
The short circuit detection voltage of this embodiment sets up to 3.2V, drops to 3.2V when the voltage suddenly to last 0.1MS, and main control chip judges for the short circuit, and the DO pin output low level cuts off the discharge channel, and the lock is died to export, and the VM pin is high level, and the system pulls the VM pin to low level 10 seconds, resumes output.
6 balance function
The lithium battery capacity balancing function is used for balancing the capacity of each lithium battery in the lithium battery pack. When the voltages of the lithium batteries are all lower than or all higher than the balance starting threshold voltage VBAL, the external discharging loop cannot be started; otherwise, the battery cell with the voltage higher than the balance starting threshold value VBAL opens the balance discharging loop, and the voltage of the lithium battery is discharged to be lower than the VBAL.
In this embodiment, if the highest voltage of the multiple lithium batteries enters the overcharge protection state and the balancing discharge circuit is turned on during charging, the charging control MOS transistor Q6 is turned off, the external balancing discharge circuit is turned on to return the voltage of the multiple lithium batteries to the overcharge release threshold voltage VREL1, and then the charging control MOS transistor Q6 is turned on to continue charging. After a sufficiently long charge-discharge cycle, all the lithium battery voltages are charged above VBAL, and the capacity of each lithium battery is eliminated.
7 temperature protection
In order to prevent the damage to the battery cell caused by the overhigh temperature of the battery cell in the charging and discharging process, the high-temperature protection of the battery cell is needed. The NTC terminal of this embodiment is connected with a thermistor R12, the thermistor R12 is used for sensing temperature changes, and the TRH pin terminal connection resistor of the main control chip is used for setting a high-temperature protection reference. During the overtemperature detection, the main control chip defaults to discharge detection. The master control chip recognizes the charge detection only when VM < -100 mV.
Taking the charging over-temperature protection as a reference, assuming that the resistance of the NTC pin end resistor R12 is RNTC during the charging over-temperature protection, the resistance of the resistor (R14) connected to the TRH pin end is RTRH ═ 2 × RNTC, and at this time, during the discharging over-temperature protection, the corresponding NTC resistance is 0.54 × RNTC corresponding temperature.
The temperature of charge-discharge over-temperature protection can be adjusted by adjusting the magnitude of RTRH. Taking an example of selecting 103AT-4 type RNTC pin end resistor, the temperature is 10K omega AT normal temperature (25 ℃), and the charging protection temperature is set to be 55 ℃. And when the temperature is 55 ℃, the corresponding RNTC is 3.5K, the resistance value of the TRH pin end resistor is RTRH (2 RNTC) 7K, the size of the corresponding NTC resistor is 0.54 RNTC (1.89K) during discharge over-temperature protection, and the corresponding temperature is 75 ℃. The charging over-temperature protection delay is 5 ℃, and the discharging over-temperature protection delay is 15 ℃. When the charging temperature is higher than the protection temperature by 55 ℃, CO is changed into a high-resistance state and is pulled down to a low level by an external resistor, the charging control MOS tube Q6 is turned off to stop charging, and when the temperature of the battery core is reduced to 50 ℃, CO is changed into a high level, and the charging control MOS tube Q6 is turned on again; when the discharge temperature is higher than the protection temperature by 75 ℃, DO changes to low level, the discharge MOS tube Q7 is turned off to stop discharging, the charge MOS tube Q6 is also turned off to prohibit charging, when the cell temperature is reduced to 60 ℃, DO changes to high level, CO changes to high level, and the charge and discharge control MOS tube Q6 is turned on again.
8, wire break protection
When the main control chip detects that any one or more of the pins VC1, VC2, VC3, VC4 and VC5 is disconnected with the connection of the battery cell, the main control chip judges that the disconnection occurs, namely the CO pin outputs a high-resistance state and the DO pin outputs a low level, and the protection state is called a disconnection protection state.
After the disconnection protection, the main control chip enters low power consumption. And when the disconnected connecting line is correctly connected again, the chip exits the disconnection protection state. Particularly, when the single chip is applied and cascade application is performed, the connection line between the chip pin GND and the electric core cannot be disconnected, and if the connection line is disconnected, the chip cannot normally work and cannot enter disconnection protection.
9 charging reverse connection overcurrent protection
When charging, the input is connected with wrong protection, (+, -reverse connection), the P-B terminal is a special charging terminal, a high-precision current detection operational amplifier is provided, the protection current can be set within the range of 0-100A, and when the current is not within the range, the circuit can start the charging reverse connection over-current protection.
The utility model discloses profitable technological effect: the utility model discloses a lithium battery circuit is provided with the electric current and overflows discharge and prevents that it overflows overcurrent protection, cross charge voltage protection circuit and overdischarge voltage protection circuit and main control chip to connect, and the reversal that charges all can protect circuit and lithium cell if the overcharge or discharge is crossed in the charging process, has improved the stability and the life of lithium cell greatly.
Variations and modifications to the above-described embodiments may occur to those skilled in the art, in light of the above teachings and teachings. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should fall within the protection scope of the claims of the present invention. In addition, although specific terms are used in the specification, the terms are used for convenience of description and do not limit the utility model in any way.
Claims (10)
1. The utility model provides an automobile intelligent power lithium battery circuit, its characterized in that, includes a plurality of lithium cell access circuits, charge-discharge prevents reverse connection overcurrent protection circuit, overcharge voltage protection circuit, overdischarge voltage protection circuit and main control chip, wherein:
the charging and discharging reverse connection prevention over-current protection circuit is connected to an input CO pin and an output DO pin of the main control chip through an over-charging voltage protection circuit and an over-discharging voltage protection circuit;
the charge-discharge anti-reverse-connection overcurrent protection circuit comprises an amplifier P1, VDD of the amplifier is connected with a lithium battery anode P + A of a protection board, GND of the amplifier is connected with a lithium battery cathode P-of the protection board, an IN + pin of an amplifier P1 is connected with a resistor R38, the other end of the resistor R38 is connected with a source electrode of an MOS tube Q8, a drain electrode of the MOS tube Q8 is connected with a charging terminal P-B, and a grid electrode of the MOS tube Q8 is connected with a GND pin of an amplifier P1 through a resistor R44;
the overcharge voltage protection circuit comprises MOS tubes Q6 and Q7, wherein the source electrode of the MOS tube Q6 is connected with a GND pin of an amplifier P1, the grid electrode of the MOS tube Q6 is connected with an input CO pin of a main control chip, and the drain electrode of the MOS tube Q7 is connected with the drain electrode of the MOS tube Q7; the source electrode of the MOS tube Q7 is connected with a GND lead of an amplifier P1, and the grid electrode of the MOS tube Q7 is connected with an output DO pin of the main control chip;
the over-discharge voltage protection circuit comprises a plurality of sampling resistors, a resistor R19 and a capacitor C11, wherein the sampling resistors are connected in parallel to form a merging branch A end and a merging branch B end, one branch of the merging branch A end is connected with VIN of the main control chip through the capacitor C11, and the other branch is directly connected with a GND pin of the main control chip; and the B end of the merging branch is connected with an output DO pin of the main control chip through a resistor R19.
2. The intelligent power lithium battery circuit of claim 1, wherein the model of the main control chip is HDS-BN, and the model of the amplifier P1 is LM 358.
3. The intelligent power lithium battery circuit of claim 1, wherein the lithium battery access circuit comprises a lithium battery BTn, a small resistor, a medium resistor, a large resistor, an MOS (metal oxide semiconductor) transistor and a capacitor, wherein one end of the small resistor is connected with the anode of the lithium battery BTn, and the other end of the small resistor is connected with the drain of the MOS transistor; one branch of a source electrode of the MOS tube is directly connected with a negative electrode of a lithium battery BTn, and the other branch of the source electrode of the MOS tube is connected with a VCn pin of a main control chip through a middle resistor; the grid electrode of the MOS tube is connected with a BALn pin of the main control chip; one end of the capacitor is connected with the source electrode of the MOS tube through the middle resistor, and the other end of the capacitor is directly connected with the GND pin of the main control chip.
4. The intelligent power lithium battery circuit of claim 3, wherein the small resistance is 150 ohms, the medium resistance is 1K ohms, and the large resistance is 10M ohms.
5. The intelligent power lithium battery circuit as claimed in claim 1, wherein the sampling resistors comprise resistors R24-R3310, and the resistance of 10 sampling resistors is the same.
6. The intelligent power lithium battery circuit as claimed in claim 1, wherein the VM pin of the main control chip is sequentially connected with a resistor R15, a forward direction of a diode D2, a resistor R7 and a base of a transistor Q2, and a collector of the transistor Q2 is further connected with the VM pin of the main control chip.
7. The circuit of claim 1, wherein the THR pin of the main control chip is sequentially connected with a resistor R7 and a resistor R8, and the resistor R8 is further connected with the base of a transistor Q2.
8. The intelligent power lithium battery circuit as claimed in claim 1, wherein the NTC pin of the main control chip is sequentially connected with a thermistor and a resistor R8, and the resistor R8 is further connected with the base of a transistor Q2.
9. The circuit of claim 1, wherein the TOC2 pin of the main control chip is sequentially connected with a capacitor C8 and a resistor R8, and the resistor R8 is further connected with the base of a transistor Q2.
10. The circuit of claim 1, wherein the TOC1 pin of the main control chip is sequentially connected with a capacitor C7 and a resistor R8;
the TOVD pin of the main control chip is sequentially connected with a capacitor C6 and a resistor R8; the TOV pin of the main control chip is sequentially connected with a capacitor C5 and a resistor R8, the resistor R8 is connected with the base level of a triode Q2, the resistor R8 is connected with a capacitor C11 in parallel, one end of a capacitor C11 is connected with the base level of the triode Q2, and the other end of the capacitor C5; the emitter of the transistor Q2 is also connected to the capacitor C5.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021984066.6U CN213341687U (en) | 2020-09-11 | 2020-09-11 | Intelligent power lithium battery circuit for automobile |
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| CN202021984066.6U CN213341687U (en) | 2020-09-11 | 2020-09-11 | Intelligent power lithium battery circuit for automobile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112087031A (en) * | 2020-09-11 | 2020-12-15 | 广州帝辉汽车用品有限公司 | Intelligent power lithium battery circuit for automobile |
| CN115622193A (en) * | 2022-11-03 | 2023-01-17 | 广州云通锂电池股份有限公司 | Protection circuit of rechargeable battery |
-
2020
- 2020-09-11 CN CN202021984066.6U patent/CN213341687U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112087031A (en) * | 2020-09-11 | 2020-12-15 | 广州帝辉汽车用品有限公司 | Intelligent power lithium battery circuit for automobile |
| CN115622193A (en) * | 2022-11-03 | 2023-01-17 | 广州云通锂电池股份有限公司 | Protection circuit of rechargeable battery |
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