CN213305009U - Battery safety management circuit of mobile energy storage power supply - Google Patents
Battery safety management circuit of mobile energy storage power supply Download PDFInfo
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- CN213305009U CN213305009U CN202021941588.8U CN202021941588U CN213305009U CN 213305009 U CN213305009 U CN 213305009U CN 202021941588 U CN202021941588 U CN 202021941588U CN 213305009 U CN213305009 U CN 213305009U
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- 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
Abstract
The utility model provides a mobile energy storage power supply battery safety control circuit, including the energy storage battery of first battery protection chip and multiunit, the energy storage battery series connection of multiunit forms total group battery, first battery protection chip is including a plurality of battery detection end, and every a set of energy storage battery independent connection has a first resistance, a triode, a second resistance, a third resistance and an electric capacity, and wherein a set of energy storage battery's anodal is connected with the one end of the first resistance of this group and the projecting pole of this group's triode, and the other end and the one end of a battery detection end of the first resistance of this group, the one end of the electric capacity of this group and the one end of the second resistance of this group are connected, the utility model discloses avoid the overcharge or the few circumstances of filling that the unbalanced charge speed leads to.
Description
Technical Field
The utility model relates to a power battery safety control circuit technical field especially relates to a mobile energy storage power supply battery safety control circuit.
Background
The mobile energy storage power supply is a device which stores electric energy by utilizing a plurality of groups of energy storage batteries and outputs the electric energy when needed. In the mobile energy storage power supply with the multiple groups of energy storage batteries, the multiple groups of energy storage batteries are connected in series and then output, so that the output voltage can be improved. Based on the safety problem that may occur to the existing energy storage battery, a safety management circuit is needed to perform safety management on the energy storage battery. The existing energy storage battery protection chip can realize the independent protection of each group of batteries. However, the battery detection end of the existing energy storage battery protection chip is directly connected with the battery pack, but a certain group of the energy storage batteries is charged too fast, namely, the problem of unbalanced charging speed exists, so that some batteries can be overcharged easily, and some batteries always have an unfilled state, which can lead to the problem of reducing the service life of the batteries.
SUMMERY OF THE UTILITY MODEL
Therefore, a safety management circuit for batteries of the mobile energy storage power supply is needed to be provided, so that the problem that overcharging or undercharging is caused by unbalanced charging speed of a plurality of groups of energy storage batteries in the mobile energy storage power supply is solved.
In order to achieve the above object, the present invention provides a mobile energy storage power battery safety management circuit, which comprises a first battery protection chip and a plurality of groups of energy storage batteries, wherein the plurality of groups of energy storage batteries are connected in series to form a total battery pack, the first battery protection chip comprises a plurality of battery detection ends, each group of energy storage batteries is separately connected with a first resistor, a triode, a second resistor, a third resistor and a capacitor, wherein the positive electrode of one group of energy storage batteries is connected with one end of the first resistor of the group and the emitter of the triode of the group, the other end of the first resistor of the group is connected with one battery detection end, one end of the capacitor of the group and one end of the second resistor of the group, the other end of the capacitor of the group is connected with the negative electrode of the total battery pack, the other end of the second resistor of the group is connected with the base electrode of the triode of the group, the collector electrode of the triode of the group is connected with one end of the third resistor of the group, the other end of the third resistor of the group is connected with the negative electrode of the energy storage battery of the group, the positive electrode of the total battery pack is connected with the positive electrode of the power source discharging end and the drain electrode of the first switch tube, the grid electrode of the first switch tube is connected with the charging control end of the first battery protection chip, the source electrode of the first switch tube is connected with the positive electrode of the power source charging end, the negative electrode of the total battery pack is connected with one end of the fourth resistor, the other end of the fourth resistor is connected with the negative electrode detection end of the first battery protection chip and the source electrode of the second switch tube, the grid electrode of the second switch tube is connected with the discharging control end of the first battery protection chip, and the drain electrode of the second switch tube is connected with the negative electrode of the power source discharging end and.
And one end of the thermistor is connected with the negative electrode of the total battery pack, and the other end of the thermistor is connected with the temperature detection end of the first battery protection chip through a resistor.
Furthermore, the number of the first switch tubes is two, the source electrodes of the two first switch tubes are connected with each other, the gate electrodes of the two first switch tubes are connected with each other, and the drain electrodes of the two first switch tubes are connected with each other.
The second battery protection chip comprises a plurality of battery detection ends, the positive electrode of each group of energy storage batteries is connected with one battery detection end of the second battery protection chip, the source electrode of the first switch tube is connected with the positive electrode of the power supply charging end through the third switch tube, the drain electrode of the third switch tube is connected with the source electrode of the first switch tube, the grid electrode of the third switch tube is connected with the charging control end of the second battery protection chip, and the source electrode of the third switch tube is connected with the positive electrode of the power supply charging end.
Furthermore, the number of the third switching tubes is two, the source electrodes of the two third switching tubes are connected with each other, the gate electrodes of the two third switching tubes are connected with each other, and the drain electrodes of the two third switching tubes are connected with each other.
The battery pack further comprises a voltage stabilizing diode, wherein the anode of the charging end of the power supply is connected with the anode of the voltage stabilizing diode, and the cathode of the voltage stabilizing diode is connected with the cathode of the total battery pack.
Further, the energy storage battery is a ternary lithium battery or a lithium iron phosphate battery.
Different from the prior art, the technical scheme is that the triode is arranged on each group of energy storage batteries, after a certain group of energy storage batteries are charged to the preset voltage, the triode is conducted, so that the charging current flows through the triode, the energy storage batteries of other groups are continuously charged, the group charged to the preset voltage is not charged any more until all the energy storage batteries reach the preset voltage, and the over-charging or under-charging condition caused by unbalanced charging speed is avoided.
Drawings
Fig. 1 is a circuit diagram according to an embodiment.
Detailed Description
To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
Referring to fig. 1, the present embodiment provides a battery safety management circuit for a mobile energy storage power supply, which includes a first battery protection chip U1 and a plurality of sets of energy storage batteries (B1-B6), where the first battery protection chip may be a lithium battery protection chip, such as a chip with a model number CW 1073. The energy storage battery may be a lithium battery, such as a ternary lithium battery or a lithium iron phosphate battery. The energy storage batteries of multiple groups are connected in series to form a total battery pack, and when the energy storage batteries are connected in series, the negative electrode of the previous group (such as B5) is connected with the positive electrode of the next group (such as B4). The first battery protection chip comprises a plurality of battery detection terminals (VC 1-VC 7), and each group of energy storage batteries are independently connected with a first resistor, a triode, a second resistor, a third resistor and a capacitor (for example, B1 is connected with a first resistor R17, a triode Q6, a second resistor R18, a third resistor R19 and a capacitor C7). Wherein the positive pole of a group of energy storage batteries is connected with one end of a first resistor of the group and the emitting pole of the group of triodes, the other end of the first resistor of the group is connected with a battery detection end, one end of a capacitor of the group is connected with one end of a second resistor of the group, the other end of the capacitor of the group is connected with the negative pole of a total battery pack, the other end of the second resistor of the group is connected with the base pole of the triode of the group, the collector pole of the triode of the group is connected with one end of a third resistor of the group, the other end of the third resistor of the group is connected with the negative pole of the energy storage batteries of the group, the positive pole of the total battery pack is connected with the positive pole P + of a power supply discharge end and the drain pole of a first switch tube (Q12 or Q13), the grid pole of the first switch tube is connected with a charge control end (CO pin), and the source pole of the first switch tube is connected with the positive pole CH + of the charge, the negative electrode of the total battery pack is connected with one end of a fourth resistor (a resistor formed by connecting R21 to R25 in parallel), the other end of the fourth resistor is connected with the negative electrode detection end (CS pin) of the first battery protection chip and the source electrode of a second switch tube Q10, the grid electrode of the second switch tube is connected with the discharge control end (DO pin) of the first battery protection chip, and the drain electrode of the second switch tube is connected with the negative electrode P-of the power supply discharge end and the negative electrode CH-of the power supply charging end.
The first battery protection chip detects discharge current through the fourth resistor, and discharge of the energy storage battery can be closed through the discharge control end when the discharge current is too high. The voltage condition of each energy storage battery can be detected through the battery detection end, and when abnormality occurs, charging can be closed through the charging control end, so that the safety of the battery is guaranteed. In the embodiment, the triode is arranged on each group of energy storage batteries, and after a certain group of energy storage batteries is charged to a preset voltage, the triode is conducted, so that the charging current flows through the triode, the energy storage batteries of other groups are continuously charged, and the group charged to the preset voltage is not charged any more until all the energy storage batteries reach the preset voltage, thereby avoiding the over-charging or under-charging condition caused by unbalanced charging speed.
In order to realize temperature protection, the battery protection device further comprises a thermistor R33 with a negative temperature coefficient, one end of the thermistor is connected with the negative electrode of the main battery pack, and the other end of the thermistor is connected with a temperature detection end (an ROT pin and an RUT pin) of the first battery protection chip through a resistor. When the temperature rises, the temperature detection end of the first battery protection chip can detect the change of the resistance, and the charging input can be closed through the charging control end.
In order to increase the passing current of the first switching tubes, the number of the first switching tubes is two (Q12 and Q13), the source electrodes of the two first switching tubes are connected with each other, the grid electrodes of the two first switching tubes are connected with each other, and the drain electrodes of the two first switching tubes are connected with each other.
The battery protection circuit further comprises a second battery protection chip U2 and a third switching tube (Q15 or Q16), wherein the second battery protection chip comprises a plurality of battery detection ends, the positive electrode of each group of energy storage batteries is connected with one battery detection end of the second battery protection chip, the source electrode of the first switching tube is connected with the positive electrode of the charging end of the power supply through the third switching tube, the drain electrode of the third switching tube is connected with the source electrode of the first switching tube, the grid electrode of the third switching tube is connected with the charging control end of the second battery protection chip, and the source electrode of the third switching tube is connected with the positive electrode of the charging end of the power supply. The second battery protection chip may be CW1072 or CW 1073. Through second battery protection chip, can further improve the security of energy storage power, avoid appearing the safety problem that first battery protection chip became invalid and lead to.
In order to increase the passing current of the third switching tubes, the number of the third switching tubes is two (Q15 and Q16), the sources of the two third switching tubes are connected with each other, the gates of the two third switching tubes are connected with each other, and the drains of the two third switching tubes are connected with each other.
In some embodiments, the battery pack further comprises a voltage stabilizing diode TVS1, wherein the anode of the charging terminal of the power supply is connected with the anode of the voltage stabilizing diode, and the cathode of the voltage stabilizing diode is connected with the cathode of the total battery pack. Through zener diode TVS1, when external input voltage was too high, zener diode TVS1 switched on for voltage ground avoids too high voltage to input in energy storage power supply's the energy storage battery.
It should be noted that, although the above embodiments have been described herein, the scope of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, the changes and modifications of the embodiments described herein, or the equivalent structure or equivalent process changes made by the contents of the specification and the drawings of the present invention, directly or indirectly apply the above technical solutions to other related technical fields, all included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a mobile energy storage power supply battery safety control circuit which characterized in that: the battery protection device comprises a first battery protection chip and a plurality of groups of energy storage batteries, wherein the plurality of groups of energy storage batteries are connected in series to form a total battery pack, the first battery protection chip comprises a plurality of battery detection ends, each group of energy storage batteries is independently connected with a first resistor, a triode, a second resistor, a third resistor and a capacitor, the positive electrode of one group of energy storage batteries is connected with one end of the first resistor of the group and the emitting electrode of the triode of the group, the other end of the first resistor of the group is connected with one battery detection end, one end of the capacitor of the group is connected with one end of the second resistor of the group, the other end of the capacitor of the group is connected with the negative electrode of the total battery pack, the other end of the second resistor of the group is connected with the base electrode of the triode of the group, the collector electrode of the triode of the group is connected with one end of the third resistor of the group, and the other end of the third resistor of the group is connected with the negative electrode, the positive pole of total group battery is connected with the positive pole of power discharge end and the drain electrode of first switch tube, the grid of first switch tube is connected with the charge control end of first battery protection chip, the source electrode of first switch tube is connected with the positive pole of power charge end, the negative pole of total group battery is connected with the one end of fourth resistance, the other end of fourth resistance is connected with the negative pole sense terminal of first battery protection chip and the source electrode of second switch tube, the grid of second switch tube is connected with the discharge control end of first battery protection chip, the drain electrode of second switch tube is connected with the negative pole of power discharge end and the negative pole of power charge end.
2. The battery safety management circuit of the mobile energy storage power supply according to claim 1, wherein: the battery pack protection circuit further comprises a thermistor with a negative temperature coefficient, one end of the thermistor is connected with the negative electrode of the main battery pack, and the other end of the thermistor is connected with the temperature detection end of the first battery protection chip through a resistor.
3. The battery safety management circuit of the mobile energy storage power supply according to claim 1, wherein: the number of the first switch tubes is two, the source electrodes of the two first switch tubes are connected with each other, the grid electrodes of the two first switch tubes are connected with each other, and the drain electrodes of the two first switch tubes are connected with each other.
4. The battery safety management circuit of the mobile energy storage power supply according to claim 1, wherein: the energy storage battery protection circuit comprises a power supply charging end, a first battery protection chip and a third switching tube, wherein the power supply charging end is connected with the positive electrode of the power supply, the positive electrode of each group of energy storage batteries is connected with one battery detection end of the second battery protection chip, the source electrode of the first switching tube is connected with the positive electrode of the power supply charging end through the third switching tube, the drain electrode of the third switching tube is connected with the source electrode of the first switching tube, the grid electrode of the third switching tube is connected with the charging control end of the second battery protection chip, and the source electrode of the third switching tube is connected with the positive electrode of the power supply charging end.
5. The battery safety management circuit of the mobile energy storage power supply according to claim 4, wherein: the number of the third switching tubes is two, the source electrodes of the two third switching tubes are connected with each other, the grid electrodes of the two third switching tubes are connected with each other, and the drain electrodes of the two third switching tubes are connected with each other.
6. The battery safety management circuit of the mobile energy storage power supply according to claim 1, wherein: the battery pack is characterized by further comprising a voltage stabilizing diode, wherein the anode of the charging end of the power supply is connected with the anode of the voltage stabilizing diode, and the cathode of the voltage stabilizing diode is connected with the cathode of the total battery pack.
7. The battery safety management circuit of the mobile energy storage power supply according to claim 1, wherein: the energy storage battery is a ternary lithium battery or a lithium iron phosphate battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021941588.8U CN213305009U (en) | 2020-09-08 | 2020-09-08 | Battery safety management circuit of mobile energy storage power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021941588.8U CN213305009U (en) | 2020-09-08 | 2020-09-08 | Battery safety management circuit of mobile energy storage power supply |
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| Publication Number | Publication Date |
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| CN213305009U true CN213305009U (en) | 2021-05-28 |
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| CN202021941588.8U Active CN213305009U (en) | 2020-09-08 | 2020-09-08 | Battery safety management circuit of mobile energy storage power supply |
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- 2020-09-08 CN CN202021941588.8U patent/CN213305009U/en active Active
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