CN113013963A - Power supply control circuit with functions of automatic shutdown protection under battery undervoltage and automatic rechargeable activation - Google Patents
Power supply control circuit with functions of automatic shutdown protection under battery undervoltage and automatic rechargeable activation Download PDFInfo
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- CN113013963A CN113013963A CN202110434439.5A CN202110434439A CN113013963A CN 113013963 A CN113013963 A CN 113013963A CN 202110434439 A CN202110434439 A CN 202110434439A CN 113013963 A CN113013963 A CN 113013963A
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00306—Overdischarge protection
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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
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
-
- 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
- H02J7/0069—Charging or discharging for charge maintenance, battery initiation or rejuvenation
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to the technical field of new energy power energy storage, and discloses a power supply control circuit with battery under-voltage automatic shutdown protection and automatic rechargeable activation aiming at the major defects in a BMS power supply structure in the field of power energy storage at present, which not only overcomes the potential safety hazard that a lithium battery pack is overdischarged or even scrapped due to standby power consumption of a DC/DC switching power supply module and the BMS, but also solves the problem of automatic charging activation after the DC/DC switching power supply module and the BMS are completely powered off, and has great practical value.
Description
Technical Field
The invention relates to the technical field of new energy power energy storage, in particular to a power supply control circuit with functions of automatic shutdown protection under battery undervoltage and automatic activation through charging.
Background
Currently, lithium ion batteries have become an important direction for the development of global high and new technology industries due to the advantages of high specific energy, high specific power, high conversion rate, long service life, no pollution and the like, and are widely applied to the fields of electric vehicles and power energy storage.
The lithium ion batteries can be divided into various types according to different anode materials, wherein lithium iron phosphate, lithium manganate, lithium cobaltate, ternary materials and the like are mainly used, but the rated voltage platforms of the lithium ion single batteries are low, the lithium iron phosphate is only 3.2Vdc, and the lithium manganate, the lithium cobaltate and the ternary materials are only 3.6-3.7 Vdc, so that the requirement of input power supply voltage of equipment is difficult to meet, and a plurality of batteries are required to be connected in series to form a group in practical application, so that the normal working voltage range of the equipment can be reached. However, unlike secondary batteries such as lead-acid, nickel-cadmium, and nickel-hydrogen batteries, lithium ion batteries must be considered for safety during charging and discharging to prevent the electrochemical characteristics from being out of control and even the batteries from being burnt. Therefore, the monitoring and the protection of the lithium ion battery are very important in the use process, and the faults of overcharge, overdischarge, over-temperature, overcurrent, short circuit and the like of the battery are avoided, so that the aims of improving the safety performance of a product and prolonging the service life of the battery are finally fulfilled.
Battery Management Systems (BMS) have been developed against this background and have taken on the important role of "battery caretakers" or "battery caregivers". The good monitoring and protecting effects of the BMS on the lithium ion battery are established on the stable and reliable operation of the BMS, and the stable and reliable operation of the BMS power supply input circuit must be ensured to ensure the normal operation of the BMS. In the field of electric automobiles, a power supply of a BMS is directly provided by a low-voltage vehicle-mounted lead-acid storage battery; however, in the field of power energy storage, the power supply of the BMS is generally provided by a single DC/DC switching power supply module after conversion, and the input end of the DC/DC switching power supply module is connected between a total positive bus and a total negative bus of the lithium battery pack, and is provided to a rear-stage BMS after being converted to a suitable power supply voltage platform by direct current.
Fig. 1 is a typical electrical topology structure of a high-voltage electrical main circuit and a BMS power supply in the field of power energy storage at present, the high-voltage electrical main circuit is composed of a lithium battery pack, a main positive relay K2, a main negative relay K3, a pre-charging relay K1, a pre-charging resistor R and other high-voltage devices, high-voltage power-on and power-off logics are controlled by the BMS, and the commonly used high-voltage power-on and power-off logics are as follows: the BMS is electrified and then carries out self-detection, after the self-detection is successful, the main negative relay K3 is closed, then the pre-charging process is carried out, the pre-charging relay K1 is closed, when the fact that the P + and the P-pre-charging voltage of a load end reach 92% of the total voltage of the lithium battery pack is detected, the main positive relay K2 is closed, the pre-charging relay K1 is opened at the same time, and high-voltage electrification is completed; in the process of putting the lithium battery pack into operation, if the BMS detects that an extreme protection condition (overcharge, overdischarge, overtemperature, overcurrent and short circuit) is triggered, the BMS enters a high-voltage power-off process, and the main positive relay K2 is switched off first, and then the main negative relay K3 is switched off. The power supply part of the BMS is arranged in a dotted line frame in the figure 1, is directly taken from two ends of the high-voltage lithium battery pack, is converted into a 12Vdc or 24Vdc low-voltage direct-current power VCC/GND through the DC/DC switching power module, and is electrically isolated from the high-voltage lithium battery pack.
However, the electrical linkage relationship of the BMS power supply shown in fig. 1 has a large safety risk: the energy of the lithium battery pack can be consumed all the time by the self power consumption of the DC/DC switching power supply module and the self power consumption of the BMS, particularly, the lithium battery pack is in a standby state (neither charging nor discharging), even after a discharging undervoltage protection action occurs, the lithium battery pack is already in a power shortage state, under the condition, although a load end P + and a load end P-are disconnected, the DC/DC switching power supply module and the BMS are still in a working state, the self power consumption of the DC/DC switching power supply module and the BMS still continuously exist, the lithium battery pack is further subjected to power shortage and overdischarge, the service life of the lithium battery pack is shortened slightly, and the lithium battery pack is directly. When the pull wire is actually electrically built and laid out, in order to solve the problem, most electrical engineers generally serially connect an air switch at the input end of a DC/DC switch power supply module, and manually switch on when a lithium battery pack is put into use, so that a BMS and high voltage are electrified; when the lithium battery pack is in a power shortage state, the switch is manually pulled, so that the BMS and the high voltage are powered down. However, this solution requires manual operation, and when the lithium battery pack is in a power-shortage state, if the lithium battery pack cannot be pulled out and powered off in time, the lithium battery pack may be discarded due to serious overdischarge.
Therefore, it is very necessary to provide a rechargeable auto-activation power control circuit with under-voltage auto-off protection.
Disclosure of Invention
The invention mainly aims to provide a power supply control circuit with battery under-voltage automatic shutdown protection and rechargeable automatic activation, and aims to solve the technical problems that an existing BMS power supply can cause over-discharge and even scrap of a lithium battery pack due to standby power consumption of a DC/DC switching power supply module and the BMS, and an external charging device cannot recover charging of the lithium battery pack in a charging activation mode after the DC/DC switching power supply module and the BMS are completely powered off.
In order to achieve the purpose, the rechargeable automatic activation power supply control circuit with under-voltage automatic shutdown protection function comprises a lithium battery pack, a charging device, reflux diodes D1-D6, a pre-charging resistor R, a pre-charging relay K1, a main positive relay K2, a main negative relay K3, a power supply relay K4, a self-resetting manual activation switch K5, a DC/DC switching power supply module and a battery management system BMS, wherein the lithium battery pack is provided with a positive terminal B + and a negative terminal B-, the charging device is provided with a positive terminal P + and a negative terminal P-, the positive terminal P +, the main positive relay K2 and the positive terminal B + are sequentially and electrically connected in series, the negative terminal B-, the main negative relay K3 and the negative terminal P-are sequentially and electrically connected in series, and the positive terminal P +, the reflux diode D3, the DC/DC switching power supply module and the reflux diode D5, Main negative relay K3 and negative terminal P-are series connection in proper order, the both ends of backward flow diode D6 respectively with backward flow diode D5 and main negative relay K3 parallel connection, positive terminal P +, main positive relay K2, backward flow diode D2, from manual activation switch K5 and DC/DC switch power module be series connection in proper order, backward flow diode D1 and power supply relay K4 all with backward flow diode D2 and from manual activation switch K5 parallel connection that restores to the throne, backward flow diode D4 both ends respectively with battery management system BMS and VCC electricity are connected, just backward flow diode D4 with power supply relay K4 electromagnetic induction connects, pre-charge resistance R and pre-charge relay K1 series connection, and pre-charge resistance R and pre-charge relay K1 respectively with main positive relay K2 parallel connection, the battery management system BMS is electrically connected to the DC/DC switching power supply module.
Optionally, the backward flow diodes D1 to D6 are all ordinary rectifier diodes or schottky diodes.
Optionally, the self-resetting manual activation switch K5 is a self-resetting push button switch or a self-resetting transfer switch.
Optionally, the power supply relay K4 is a normally open power relay.
By adopting the technical scheme of the invention, the invention has the following beneficial effects:
1. in the conventional BMS power supply structure, the serious potential safety hazard that the lithium battery pack is overdischarged or even scrapped possibly due to standby power consumption of a DC/DC switch power supply module and the BMS is solved completely only by adding 6 reverse flow diodes D1-D6, 1 self-reset manual activation switch K5 and 1 power supply relay K4;
2. the BMS power supply control circuit can automatically cut off a power supply input loop of the DC/DC switching power supply module through a preset software program after the lithium battery pack generates a discharge undervoltage protection action, so that the DC/DC switching power supply module and the BMS are completely powered off;
3. the BMS power supply control circuit provided by the invention can automatically cut off the power supply input loop of the DC/DC switching power supply module through a preset software program under the condition that the lithium battery pack is not charged or discharged, namely when the continuous standby state reaches a certain time, so that the DC/DC switching power supply module and the BMS are completely powered off;
4. the BMS power control circuit provided by the invention can recover the charging of the lithium battery pack by using an external charging device in a charging activation mode after the DC/DC switching power module and the BMS are completely powered off;
5. the BMS power control circuit provided by the invention can use the self-reset manual activation switch K5 to enable the lithium battery pack to be put into operation in a manual activation mode after the DC/DC switching power module and the BMS are completely powered off.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a diagram of a typical electrical topology of a high voltage electrical main loop and a BMS power supply in the field of power storage;
fig. 2 is a schematic diagram of an overall frame structure of a power control circuit with under-voltage auto-shutdown protection and rechargeable auto-activation according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a power supply control circuit with functions of automatic shutdown protection under battery undervoltage and automatic activation through charging.
As shown in fig. 2, in an embodiment of the invention, the power control circuit with under-voltage auto-off protection and rechargeable automatic activation function comprises a lithium battery pack, a charging device, reflux diodes D1-D6, a pre-charging resistor R, a pre-charging relay K1, a main positive relay K2, a main negative relay K3, a power supply relay K4, a self-resetting manual activation switch K5, a DC/DC switching power module and a battery management system BMS, wherein the lithium battery pack is provided with a positive terminal B + and a negative terminal B-, the charging device is provided with a positive terminal P + and a negative terminal P-, the positive terminal P +, the main positive relay K2 and the positive terminal B + are sequentially and electrically connected in series, the negative terminal B-, the main negative relay K3 and the negative terminal P-are sequentially and electrically connected in series, the positive terminal P +, the reflux diode D3, the DC/DC switching power module and the reflux diode D5, Main negative relay K3 and negative terminal P-are series connection in proper order, the both ends of backward flow diode D6 respectively with backward flow diode D5 and main negative relay K3 parallel connection, positive terminal P +, main positive relay K2, backward flow diode D2, from manual activation switch K5 and DC/DC switch power module be series connection in proper order, backward flow diode D1 and power supply relay K4 all with backward flow diode D2 and from manual activation switch K5 parallel connection that restores to the throne, backward flow diode D4 both ends respectively with battery management system BMS and VCC electricity are connected, just backward flow diode D4 with power supply relay K4 electromagnetic induction connects, pre-charge resistance R and pre-charge relay K1 series connection, and pre-charge resistance R and pre-charge relay K1 respectively with main positive relay K2 parallel connection, the battery management system BMS is electrically connected to the DC/DC switching power supply module.
The invention only adds 6 reverse flow diodes D1-D6, 1 self-reset manual activation switch K5 and 1 power supply relay K4 on the electrical schematic diagram of the BMS power supply used at present, thus thoroughly solving the potential safety hazard that the lithium battery pack is overdischarged or even scrapped due to the standby power consumption of a DC/DC switch power supply module and the BMS, the detailed circuit principle is shown in figure 2, and the power supply control circuit has three functions: firstly, after the lithium battery pack has discharge under-voltage protection action, a power supply input loop of the DC/DC switching power supply module can be automatically cut off through a preset software program, so that the DC/DC switching power supply module and the BMS can be completely powered off; secondly, the power supply input loop of the DC/DC switching power supply module can be automatically cut off through a preset software program under the state that the lithium battery pack is not charged or discharged, namely when the continuous standby state reaches a certain time, so that the DC/DC switching power supply module and the BMS can be completely powered off; thirdly, after the DC/DC switching power supply module and the BMS are completely powered off, the lithium battery pack can be restored to be charged by an external charging device in a charging and activating mode; fourthly, after the DC/DC switching power supply module and the BMS are completely powered off, the lithium battery pack can be put into operation in a manual activation mode by using a self-resetting manual activation switch.
Specifically, the reflux diodes D1 to D6 are all ordinary rectifier diodes or schottky diodes.
In particular, the self-resetting manual activation switch K5 is a self-resetting push button switch or a self-resetting transfer switch.
Specifically, the power supply relay K4 is a normally open power relay.
Specifically, the device needs to meet the requirements of overcurrent capacity (namely, the power supply output power of the DC/DC switching power supply module) and direct current withstand voltage value (namely, the direct current total voltage value of the lithium battery pack is reached or exceeded).
Specifically, the working principle and process of the power control circuit with the functions of under-voltage automatic shutdown protection and rechargeable automatic activation are described as follows:
firstly, lithium battery pack charging is automatically activated to charging protection action
(1) After the charging device (or from a power conversion system PCS) is switched on and powered on, the direct-current high voltage is output to form a low-voltage charging loop through P +, a reflux diode D3, the input stage of the DC/DC switching power supply module, a reflux diode D6 and P < - >, the DC/DC switching power supply module is powered on, the DC/DC switching power supply module converts the direct-current high voltage output by the charging device into a 12Vdc or 24Vdc low-voltage direct-current power supply VCC/GND and then supplies power to the BMS, and the BMS is charged, activated and awakened;
(2) after the BMS is electrified, the high-voltage electrifying and pre-charging process is carried out, each high-voltage relay is sequentially closed, the power supply relay K4 is closed, because the direct-current voltage output by the charging device is higher than the total direct-current voltage of the lithium battery pack, the charging device forms a high-voltage charging loop through P +, the main positive relay K2, the lithium battery pack, the main negative relay K3 and P-, the lithium battery pack is charged, and simultaneously forms a low-voltage charging loop through P +, the reverse-flow diode D3 (or the main positive relay K2, the reverse-flow diode D1 and the power supply relay K4), the input stage of the DC/DC switching power supply module, the reverse-flow diode D6 (or the reverse-flow diode D5 and the main negative relay K3) and the P-, and the DC/;
(3) in the charging process, when the BMS detects that the charging protection conditions (over-charging, over-temperature and over-current) are triggered, the BMS enters a high-voltage power-down process, all high-voltage relays are sequentially disconnected, a charging high-voltage loop is disconnected, and charging is stopped, and at the moment, the power supply of the BMS is provided by a low-voltage discharging loop consisting of a lithium battery pack, a reverse current diode D1, a power supply relay K4, a DC/DC switching power supply module input stage and a reverse current diode D5;
(4) the lithium battery pack charging protection action is in a standby state without charging or discharging, when the standby state is continued for a certain time, the BMS sets the program control power supply relay K4 to be switched off through the preset software, the power supply input loop of the DC/DC switching power supply module is cut off, the DC/DC switching power supply module and the BMS are thoroughly powered off, and the whole electric system is in a zero power consumption state.
Second, the action of manually activating the lithium battery pack to discharge protection
(1) Manually pressing the self-reset activation switch K5 for about 3 seconds, enabling the lithium battery pack to form a low-voltage discharge loop through the backflow diode D2, the self-reset manual activation switch K5, the input stage of the DC/DC switching power supply module and the backflow diode D5, supplying power to the DC/DC switching power supply module, converting the direct-current high voltage of the lithium battery pack into a 12Vdc or 24Vdc low-voltage direct-current power supply VCC/GND by the DC/DC switching power supply module, and then supplying power to the BMS, wherein the BMS is manually activated and awakened;
(2) after the BMS is electrified, the high-voltage electrifying and pre-charging process is carried out, each high-voltage relay is sequentially closed, meanwhile, the power supply relay K4 is closed, at the moment, the self-reset manual activation switch K5 is released, a low-voltage discharge loop of the self-reset manual activation switch K5 is disconnected, instead, a low-voltage discharge loop of the lithium battery pack is formed by the reverse flow diode D1, the power supply relay K4 (or the main positive relay K2 and the reverse flow diode D3), the DC/DC switch power supply module input stage and the reverse flow diode D5 (or the reverse flow diode D6 and the main negative relay K3), and the DC/DC switch power supply module is continuously supplied with power;
(3) in the discharging process, when the BMS detects that the discharging protection conditions (over-discharge, over-temperature, over-current and short circuit) are triggered, the BMS enters a high-voltage discharging process, all high-voltage relays are sequentially disconnected, a discharging high-voltage loop is disconnected, and discharging is stopped, and at the moment, the power supply of the BMS is provided by a low-voltage discharging loop consisting of a lithium battery pack, a reverse current diode D1, a power supply relay K4, a DC/DC switching power supply module input stage and a reverse current diode D5;
(4) if the discharge protection action of the lithium battery pack is caused by over-discharge of the battery, namely under-voltage protection of the battery, after the discharge high-voltage loop is disconnected, waiting for the BMS to finish data storage, and immediately controlling the power supply relay K4 to be disconnected by the BMS; if the discharge protection action of the lithium battery pack is caused by over-temperature, over-current and short-circuit protection, after the discharge high-voltage loop is disconnected, the lithium battery pack is in a standby state without charging and discharging, and when the standby state is continued for a certain time, the BMS controls the power supply relay K4 to be disconnected through a preset software setting program. The power supply relay K4 is turned off, that is, the power supply input loop of the DC/DC switching power supply module is cut off, so that the DC/DC switching power supply module and the BMS are completely powered off, and the entire electrical system is in a zero power consumption state.
The power control circuit with the function of automatic shutdown protection of the under-voltage of the battery and the function of automatic activation of the rechargeable battery not only overcomes the defect that the lithium battery pack is overdischarged or even scrapped due to the standby power consumption of the DC/DC switching power module and the BMS, but also solves the problem of automatic activation of the rechargeable battery pack after the DC/DC switching power module and the BMS are completely powered off, and has higher practical value.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (4)
1. The power control circuit with the functions of under-voltage automatic shutdown protection and rechargeable automatic activation is characterized by comprising a lithium battery pack, a charging device, backflow diodes D1-D6, a pre-charging resistor R, a pre-charging relay K1, a main positive relay K2, a main negative relay K3, a power supply relay K4, a self-resetting manual activation switch K5, a DC/DC switching power module and a battery management system BMS, wherein the lithium battery pack is provided with a positive terminal B + and a negative terminal B-, the charging device is provided with a positive terminal P + and a negative terminal P-, the positive terminal P +, the main positive relay K2 and the positive terminal B + are sequentially and electrically connected in series, the negative terminal B-, the main negative relay K3 and the negative terminal P-are sequentially and electrically connected in series, and the positive terminal P +, the backflow diode D3, the DC/DC switching power module and the backflow diode D5, Main negative relay K3 and negative terminal P-are series connection in proper order, the both ends of backward flow diode D6 respectively with backward flow diode D5 and main negative relay K3 parallel connection, positive terminal P +, main positive relay K2, backward flow diode D2, from manual activation switch K5 and DC/DC switch power module be series connection in proper order, backward flow diode D1 and power supply relay K4 all with backward flow diode D2 and from manual activation switch K5 parallel connection that restores to the throne, backward flow diode D4 both ends respectively with battery management system BMS and VCC electricity are connected, just backward flow diode D4 with power supply relay K4 electromagnetic induction connects, pre-charge resistance R and pre-charge relay K1 series connection, and pre-charge resistance R and pre-charge relay K1 respectively with main positive relay K2 parallel connection, the battery management system BMS is electrically connected to the DC/DC switching power supply module.
2. The under-voltage battery auto-off protection and rechargeable auto-activation power control circuit as claimed in claim 1, wherein the reverse flow diodes D1-D6 are all ordinary rectifier diodes or schottky diodes.
3. The under-voltage battery auto-off protection and rechargeable auto-activated power control circuit of claim 1, wherein the self-reset manual activation switch K5 is a self-reset button switch or a self-reset transfer switch.
4. The under-voltage battery auto-off protection and rechargeable auto-activated power control circuit of claim 1, wherein the power supply relay K4 is a normally open power relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110434439.5A CN113013963A (en) | 2021-04-22 | 2021-04-22 | Power supply control circuit with functions of automatic shutdown protection under battery undervoltage and automatic rechargeable activation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110434439.5A CN113013963A (en) | 2021-04-22 | 2021-04-22 | Power supply control circuit with functions of automatic shutdown protection under battery undervoltage and automatic rechargeable activation |
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| CN113013963A true CN113013963A (en) | 2021-06-22 |
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| CN202110434439.5A Pending CN113013963A (en) | 2021-04-22 | 2021-04-22 | Power supply control circuit with functions of automatic shutdown protection under battery undervoltage and automatic rechargeable activation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114750594A (en) * | 2022-04-29 | 2022-07-15 | 重庆长安新能源汽车科技有限公司 | Battery system and vehicle |
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2021
- 2021-04-22 CN CN202110434439.5A patent/CN113013963A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114750594A (en) * | 2022-04-29 | 2022-07-15 | 重庆长安新能源汽车科技有限公司 | Battery system and vehicle |
| CN114750594B (en) * | 2022-04-29 | 2024-06-04 | 深蓝汽车科技有限公司 | Battery system and vehicle |
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