CN205070405U - Simulate non - balanced BMS protection shield with secondary protect function - Google Patents
Simulate non - balanced BMS protection shield with secondary protect function Download PDFInfo
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- CN205070405U CN205070405U CN201520755564.6U CN201520755564U CN205070405U CN 205070405 U CN205070405 U CN 205070405U CN 201520755564 U CN201520755564 U CN 201520755564U CN 205070405 U CN205070405 U CN 205070405U
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Abstract
The utility model provides a simulate non - balanced BMS protection shield with secondary protect function, it includes to simulate non - balanced BMS protection shield: the redundant chip IC2 of lithium electric protection owner chip IC1, lithium electric protection, charging switch, discharge switch, examine leakage resistance, fusing formula protection circuit, it is used for carrying out filling over discharge protection and charge -discharge overcurrent protection to electric bicycle's group battery to simulate non - balanced BMS protection shield. The utility model discloses use different redundant lithium electric protection IC of monomer protection electric pressure and fusing formula circuit to realize secondary protect function, fusing formula circuit adopts T type dual fail -safe circuit, when unusual heavy current protection lithium cell appearing, also can protect the charger, when lithium electric protection IC and MOS tube failure, during unusual charge -discharge, accessible time cut off the return circuit, fully protect the security and the reliability of lithium cell package.
Description
Technical field
The utility model relates to battery protecting circuit field, is specifically related to battery management system (BMS) baffle for electric bicycle.
Background technology
Battery management system is used for the change of Real-Time Monitoring monomer battery voltage, size of current and temperature, prevents battery from occurring the generation of overcharge and overdischarge and discharge and recharge big current, can improve the utilance of battery, extends the useful life of battery.
Simulation lack of balance BMS baffle be wherein a kind of baffle, is realized, adopt the way to manage of the electric Management IC of integrated lithium and extended power metal-oxide-semiconductor by hardware circuit.Integrated lithium electricity Management IC detects the voltage of corresponding single lithium battery, temperature and battery pack current; according to set parameter real time discriminating battery state; provide normal or protection (overcharge, cross put, excess temperature, overcurrent) signal; the signal that power MOS pipe provides according to integrated lithium electricity Management IC performs conducting or turns off main charge and discharge loop, thus realizes the protection to lithium battery.
Traditional B MS baffle, when occurring that charging and discharging currents is excessive, easily causes harmful effect to lithium battery performance.For this problem, at present conventional a kind of mode is serial connection insurance on the outer charging and discharging circuit line of baffle, when preventing abnormal big current from occurring, can cut-off loop in time, and protect the safety of lithium battery, this baffle is as Fig. 1.
But there is following defect in the baffle adopted at present:
1, Method compare is single, when component failures such as baffle master chip or metal-oxide-semiconductors, cannot shield, can cause the security incidents such as lithium battery blast on fire;
2, when abnormal discharge and recharge (current anomaly, baffle set in monomer voltage protection range at lithium electric protection IC and do not protect) appears in lithium battery, baffle cannot play cut-off loop effect.
Therefore, there is very serious potential safety hazard in the baffle of the currently used battery management system for electric bicycle, effectively can not protect the safety of battery and surrounding enviroment when abnormal discharge and recharge or the component failure such as baffle master chip or metal-oxide-semiconductor.
Utility model content
For the problem existing for current battery management system baffle, the object of this invention is to provide new baffle, its can:
1, when battery generation paradoxical discharge (the monomer Cross prevention magnitude of voltage lower than lithium electric protection IC sets), protected by second protection circuit realiration cut-off loop
2, protected by second protection circuit realiration cut-off loop when abnormal charging (the monomer over-charge protective magnitude of voltage higher than lithium electric protection IC sets) occurs battery;
3, when component failures such as baffle master chip or metal-oxide-semiconductors, still can cut off circuit in time, realize the protection to battery.
Specifically; the utility model provides a kind of simulation lack of balance BMS baffle with secondary protection function; it is characterized in that; described simulation lack of balance BMS baffle comprises: lithium electric protection master chip IC1, lithium electric protection redundancy chip IC2, charge switch, discharge switch, inspection leakage resistance, Fuse Type protective circuit; described simulation lack of balance BMS baffle is used for carrying out charge and discharge protection to the battery pack of electric bicycle
Described charge switch is for controlling conducting between described charger and described battery pack and shutoff;
Described discharge switch is for controlling conducting between described load and described battery pack and shutoff;
Described inspection leakage resistance and described battery pack are connected in series, for the charging or discharging current of described battery pack being fed back to described lithium electric protection master chip IC1;
Described Fuse Type protective circuit is connected in series in the charging and discharging circuit of described battery pack;
Described lithium electric protection master chip IC1 and described lithium electric protection redundancy chip IC2 receives the voltage signal of each node from described battery pack respectively; and obtain the magnitude of voltage of every batteries; described lithium electric protection master chip IC1 is connected with described discharge switch with described charge switch respectively; and for controlling its switch; described lithium electric protection redundancy chip IC2 is connected with described Fuse Type protective circuit, for controlling the fusing of described Fuse Type protective circuit.
Preferably, described simulation lack of balance BMS baffle also comprises RC filter circuit, and described lithium electric protection master chip IC1 and described lithium electric protection redundancy chip IC2 monitors the voltage of each cell in described battery pack by described RC filter circuit.
Preferably; described simulation lack of balance BMS baffle also comprises temperature switch; described temperature switch is used for the temperature of monitoring and protecting plate and surrounding environment; when the temperature that described temperature switch records exceedes temperature threshold, described temperature switch conducting also provides feedback to described lithium electric protection master chip IC1.
Preferably, described lithium electric protection master chip IC1 provide based on described temperature switch feedback signal, the charging or discharging current of the voltage of each cell, the described battery pack of described inspection leakage resistance feedback controls conducting and the shutoff of described charge switch and described discharge switch in described battery pack.
Preferably; described lithium electric protection master chip IC1 and described lithium electric protection redundancy chip IC2 is for the voltage sets threshold value of cell each in described battery pack, and the monomer super-charge super-discharge of described lithium electric protection redundancy chip IC2 protection voltage threshold scope is wider than described lithium electric protection master chip IC1.
Preferably, described Fuse Type protective circuit also comprises fuse cutout, first fusing insurance F1, second fusing insurance F2, logical circuit, described first fusing insurance F1, second fusing insurance F2 and described battery pack are connected in series, described fuse cutout one end is connected to the tie point of described first fusing insurance F1 and second fusing insurance F2, other end ground connection, described logical circuit is for controlling described fuse cutout, when the voltage of cell each in described battery pack exceedes the respective threshold of described lithium electric protection master chip IC1 setting and reaches the respective threshold of described lithium electric protection redundancy chip IC2 setting, described lithium electric protection redundancy chip IC2 controls described fuse cutout conducting, fuse to make described Fuse Type protective circuit, and there is big current when occurring that charger is abnormal, more than F2 setting permission maximum current time, described second fusing insurance F2 fusing, protection battery pack and charger.
Preferably, described discharge switch is electric discharge metal-oxide-semiconductor, and described charge switch is charging metal-oxide-semiconductor.
Preferably, described lithium electric protection master chip IC1 adopts ML5235-004 and described lithium electric protection redundancy chip IC2 to adopt ML5235-005.
Beneficial effect
1, the utility model uses the redundancy lithium electric protection IC2 and Fuse Type circuit realiration secondary protection function that monomer protection electric pressure is different;
2, Fuse Type circuit adopts T-shaped dual fail-safe circuit, while occurring that abnormal big current (exceeding the lowest high-current value of baffle setting) protects lithium battery, also can protect charger;
3, when lithium electric protection IC and metal-oxide-semiconductor lost efficacy, during abnormal discharge and recharge (exceeding the monomer protection range of voltage values of baffle setting), can cut-off loop in time, the safety and reliability of the lithium battery bag that adequately protects.
Accompanying drawing explanation
Fig. 1 shows the structural representation of baffle used in the prior art;
Fig. 2 shows the electrical block diagram of baffle of the present utility model;
Fig. 3 shows the workflow schematic diagram of baffle of the present utility model.
Embodiment
The principle schematic of one embodiment of the invention as shown in Figure 2.Baffle (or claiming protective circuit) comprises lithium electric protection master chip IC1, redundancy chip IC2, electric discharge metal-oxide-semiconductor G2, charging metal-oxide-semiconductor G3, inspection leakage resistance, Fuse Type protective circuit etc.
As shown in FIG.; the present embodiment is on the basis of original hardware protection circuit; add a heavy Fuse Type protective circuit; adopt lithium electric protection IC1 (ML5235-004) the Real-Time Monitoring monomer battery voltage that two cover monomer charging/discharging voltage protection value grades are different, IC2 (ML5235-005) Real-Time Monitoring monomer battery voltage also controls Fuse Type protective circuit.
As shown in the figure, battery pack (or claiming power brick), inspection leakage resistance, electric discharge metal-oxide-semiconductor G2, charging metal-oxide-semiconductor G3 are sequentially connected in series.An input of charging metal-oxide-semiconductor G3 connecting charger, another input of charger connects the positive pole of battery pack through Fuse Type protective circuit.The drain electrode of electric discharge metal-oxide-semiconductor connects one end of load, and the other end of load connects the positive pole of battery pack through Fuse Type protective circuit.
IC1 and IC2 all receives the voltage signal from each node of battery, and battery node mentioned here refers to the node between any two batteries, and the node at battery pack two ends, can be determined the voltage of every batteries by these nodes.
IC1 exports two-way drive singal electric discharge drive singal DO1 and charging drive singal CO1, and the two is controlled discharge metal-oxide-semiconductor G2, charging metal-oxide-semiconductor G3 respectively, when battery pack normally works, and electric discharge metal-oxide-semiconductor G2 and charging MOS normal open.
IC2 (ML5235-005) and IC1 (ML5235-004) adopt the chip of different model, and IC2 arranges wider monomer super-charge super-discharge protection voltage threshold scope than IC1.In the present embodiment, the concrete threshold value set in IC1 is monomer overcharged voltage 4.25V, crosses and put 2.8V, charging overcurrent 12 ± 4A, electric discharge overcurrent 45 ± 5A, temperature protection 75 ± 5 DEG C.And the various threshold values set in IC2 are respectively: monomer overcharged voltage 4.3V, monomer overdischarge pressure 2.7V.
IC2 also exports two-way drive singal electric discharge drive singal DO2 and charging drive singal CO2, two-way driving through logical circuit for controlling fuse cutout G1, the working method of logical circuit is: when the drive singal DO2 and charging drive singal CO2 that discharges is high level, output low level, when two paths of signals Zhong mono-tunnel is low level, export high level.Once logical circuit exports high level, then G1 conducting, makes battery pack temporary short circuit and fuse wire F1.
Described inspection leakage resistance is used for the charging or discharging current of battery pack to feed back to described lithium electric protection master chip IC1.In addition, baffle can also comprise RC filter circuit, and lithium electric protection master chip IC1 monitors the voltage of each cell in described battery pack by described RC filter circuit.
Baffle can also comprise temperature switch, and temperature switch is used for the temperature of monitoring and protecting plate and surrounding environment, and when the temperature that temperature switch records exceedes temperature threshold, temperature switch conducting also provides feedback to described lithium electric protection master chip IC1.Temperature switch is powered by the Vreg1 of IC1, and voltage is 4.25V.In figure, the Vreg2 at IC2 place is that a road of chip IC 2 exports and may be used for subsequent expansion.The voltage of each cell, the charging or discharging current controlled discharge switch of described battery pack of inspection leakage resistance feedback and the conducting of discharge switch and shutoff in the feedback signal that lithium electric protection master chip IC1 provides based on temperature switch, battery pack.
The specific works flow process of the baffle in the present embodiment is as follows:
1) under normal circumstances: charging and discharging lithium battery is controlled; namely protection can be realized by IC1 control when monomer reaches the set parameter of lithium electric protection IC1 (overcharge 4.25V, cross and put 2.8V, charging overcurrent 12 ± 4A, electric discharge overcurrent 45 ± 5A, temperature protection 75 ± 5 DEG C); IC1 drive singal D01 and DO2 position high level after power brick connection baffle, controlled discharge metal-oxide-semiconductor G2, charging metal-oxide-semiconductor G3 conducting
Discharge process: power brick connects load and discharges, and when reaching the monomer Cross prevention magnitude of voltage that lithium electric protection IC1 sets, drive singal DO1 becomes low level, electric discharge metal-oxide-semiconductor G2 closes, and stops electric discharge; In addition, discharging current feeds back to the Is pin of lithium electric protection chip IC 1 through the inspection leakage resistance of 6 milliohms, and when discharging current is excessive, when reaching the discharging current protection value of Is pin setting, metal-oxide-semiconductor G2 also can close, and power brick stops to load discharge.
Charging process: power brick connects 36V charger and charges, when IC1 record any batteries in battery pack reach the monomer over-charge protective magnitude of voltage that lithium electric protection IC1 sets time, drive singal CO1 becomes low level, and charging metal-oxide-semiconductor G3 closes, and stops charging; In addition, because charging current feeds back to the Is pin of lithium electric protection IC1 through inspection leakage resistance, when discharging current is excessive, when reaching the charging current protection value of Is pin setting, metal-oxide-semiconductor G3 also can close, baffle cut-off loop, and charger stops charging to power brick.
In addition, can also measure baffle temperature and surrounding environment, when temperature exceedes predetermined threshold, IC1 also can control CO1 and DO1 output low level, and electric discharge metal-oxide-semiconductor G2 is turned off with charging metal-oxide-semiconductor G3.
2) under abnormal conditions, (abnormal conditions mentioned here refer to curtage more than the threshold value set by IC1; but the situation of metal-oxide-semiconductor G2 or G3 cannot be turned off): lithium electric protection redundancy chip IC2 detects monomer abnormal charge and discharge voltage (set parameter: monomer voltage abnormal overdischarge pressure is minimum is up to 4.3V for 2.7V, the abnormal overcharged voltage of monomer voltage) in real time; charging metal-oxide-semiconductor drive singal CO2 and the electric discharge metal-oxide-semiconductor drive singal DO2 of normal condition lithium electric protection redundancy chip IC2 are high level
Paradoxical discharge process: when lithium electric protection IC1 or electric discharge metal-oxide-semiconductor lost efficacy not controlled (namely conducting always cannot be closed), cannot cut-off loop, power brick can be discharged always, when monomer voltage in power brick reaches minimum voltage 2.7V, then belong to paradoxical discharge situation, the now lithium electric protection chip IC 2 drive singal DO2 that discharges can become low level, metal-oxide-semiconductor G1 conducting is controlled through logical circuit (level shifting circuit built by triode), fuse F1 fuses, cut off major loop, realize discharge prevention; When discharging current over insurance can bear electric current, the lithium electric protection chip IC 2 drive singal DO2 that discharges also can become low level, and fuse F1 fuses, and realizes discharge prevention.
Abnormal charging process: situation 1: when lithium electric protection IC1 or charging metal-oxide-semiconductor lost efficacy not controlled time (conducting always cannot be closed), cannot cut-off loop, charger can charge to power brick always, when monomer voltage in power brick reaches ceiling voltage 4.3V, then belong to abnormal charge condition, the now lithium electric protection chip IC 2 drive singal CO2 that charges can become low level, metal-oxide-semiconductor G1 conducting is controlled through logical circuit (level shifting circuit built by triode), blown fuse, realizes charge protection;
Situation 2: if charger is abnormal, occur big current, fuse F2 can directly fuse, and realizes charge protection.
The solution of the present invention unlike the prior art; prior art mostly adopts and on charge and discharge return line, to be connected in series safe manner to realize big current protection; but when this mode can not solve as not controlled in electric discharge metal-oxide-semiconductor; and there is not big current; now baffle cannot play a protective role; battery meeting continuous discharge, impacts battery performance.Owing to adopting two cover IC, even if there is above-mentioned situation, when battery cell voltage reaches IC2 super-charge super-discharge voltage protection value, IC2 can send control signal, cut-off loop, realizes protection.
Although be described in detail principle of the present utility model in conjunction with preferred embodiment of the present utility model above, those skilled in the art should understand that, above-described embodiment is only the explanation to exemplary implementation of the present utility model, not the utility model is comprised to the restriction of scope.Details in embodiment does not form the restriction to the utility model scope; when not deviating from spirit and scope of the present utility model; the apparent changes such as any equivalent transformation based on technical solutions of the utility model, simple replacement, all drop within the utility model protection range.
Claims (8)
1. one kind has the simulation lack of balance BMS baffle of secondary protection function; it is characterized in that; described simulation lack of balance BMS baffle comprises: lithium electric protection master chip IC1, lithium electric protection redundancy chip IC2, charge switch, discharge switch, inspection leakage resistance, Fuse Type protective circuit; described simulation lack of balance BMS baffle is used for carrying out charge and discharge protection to the battery pack of electric bicycle
Described charge switch is for controlling conducting between described charger and described battery pack and shutoff;
Described discharge switch is for controlling conducting between described load and described battery pack and shutoff;
Described inspection leakage resistance and described battery pack are connected in series, for the charging or discharging current of described battery pack being fed back to described lithium electric protection master chip IC1;
Described Fuse Type protective circuit is connected in series in the charging and discharging circuit of described battery pack;
Described lithium electric protection master chip IC1 and described lithium electric protection redundancy chip IC2 receives the voltage signal of each node from described battery pack respectively; and obtain the magnitude of voltage of every batteries; described lithium electric protection master chip IC1 is connected with described discharge switch with described charge switch respectively; and for controlling its switch; described lithium electric protection redundancy chip IC2 is connected with described Fuse Type protective circuit, for controlling the fusing of described Fuse Type protective circuit.
2. simulation lack of balance BMS baffle according to claim 1; it is characterized in that; described simulation lack of balance BMS baffle also comprises RC filter circuit, and described lithium electric protection master chip IC1 and described lithium electric protection redundancy chip IC2 monitors the voltage of each cell in described battery pack by described RC filter circuit.
3. simulation lack of balance BMS baffle according to claim 2; it is characterized in that; described simulation lack of balance BMS baffle also comprises temperature switch; described temperature switch is used for the temperature of monitoring and protecting plate and surrounding environment; when the temperature that described temperature switch records exceedes temperature threshold, described temperature switch conducting also provides feedback to described lithium electric protection master chip IC1.
4. simulation lack of balance BMS baffle according to claim 3, is characterized in that,
In the feedback signal that described lithium electric protection master chip IC1 provides based on described temperature switch, described battery pack, the charging or discharging current of the voltage of each cell, the described battery pack of described inspection leakage resistance feedback controls conducting and the shutoff of described charge switch and described discharge switch.
5. simulation lack of balance BMS baffle according to claim 4; it is characterized in that; described lithium electric protection master chip IC1 and described lithium electric protection redundancy chip IC2 is for the voltage sets threshold value of cell each in described battery pack, and the monomer super-charge super-discharge of described lithium electric protection redundancy chip IC2 protection voltage threshold scope is wider than described lithium electric protection master chip IC1.
6. simulation lack of balance BMS baffle according to claim 4, it is characterized in that, described Fuse Type protective circuit also comprises fuse cutout, first fusing insurance F1, second fusing insurance F2, logical circuit, described first fusing insurance F1, second fusing insurance F2 and described battery pack are connected in series, described fuse cutout one end is connected to the tie point of described first fusing insurance F1 and second fusing insurance F2, other end ground connection, described logical circuit is for controlling described fuse cutout, when the voltage of any one cell in described battery pack exceedes the respective threshold of described lithium electric protection master chip IC1 setting and reaches the respective threshold of described lithium electric protection redundancy chip IC2 setting, described lithium electric protection redundancy chip IC2 controls described fuse cutout conducting, fuse to make described Fuse Type protective circuit, and there is big current when occurring that charger is abnormal, more than F2 setting permission maximum current time, described second fusing insurance F2 fusing, protection battery pack and charger.
7. simulation lack of balance BMS baffle according to claim 1, is characterized in that, described discharge switch is electric discharge metal-oxide-semiconductor, and described charge switch is charging metal-oxide-semiconductor.
8. simulation lack of balance BMS baffle according to claim 1, is characterized in that, described lithium electric protection master chip IC1 adopts ML5235-004 and described lithium electric protection redundancy chip IC2 to adopt ML5235-005.
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| CN201520755564.6U CN205070405U (en) | 2015-09-25 | 2015-09-25 | Simulate non - balanced BMS protection shield with secondary protect function |
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| CN201520755564.6U CN205070405U (en) | 2015-09-25 | 2015-09-25 | Simulate non - balanced BMS protection shield with secondary protect function |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106463991A (en) * | 2016-05-27 | 2017-02-22 | 广东欧珀移动通信有限公司 | Battery protection board, battery and mobile terminal |
| CN108808630A (en) * | 2017-09-07 | 2018-11-13 | 惠州市德赛电池有限公司 | A kind of lithium ion battery protecting plate circuit |
| CN110391644A (en) * | 2018-04-19 | 2019-10-29 | 凹凸电子（武汉）有限公司 | Battery protection system, battery pack and guard method |
| US10644520B2 (en) | 2016-05-27 | 2020-05-05 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Battery protection board, battery and mobile terminal |
| CN112285463A (en) * | 2020-10-13 | 2021-01-29 | 安徽锐能科技有限公司 | Testing device and method for lithium battery protection board and storage medium |
| CN112838647A (en) * | 2021-02-26 | 2021-05-25 | 江西迪比科股份有限公司 | Lithium ion battery circuit with multiple protection functions |
| CN112918325A (en) * | 2021-03-25 | 2021-06-08 | 苏州联胜新能源科技有限公司 | Method for realizing kinetic energy recovery completely depending on lithium battery |
| WO2021223729A1 (en) * | 2020-05-07 | 2021-11-11 | 南京德朔实业有限公司 | Battery pack and electric tool system |
| CN113872303A (en) * | 2021-10-22 | 2021-12-31 | 北京小米移动软件有限公司 | Charging control method and device, electronic equipment and storage medium |
| CN114006433A (en) * | 2021-11-01 | 2022-02-01 | 长沙优力电驱动系统有限公司 | Battery device |
| CN115954987A (en) * | 2023-02-03 | 2023-04-11 | 深圳市凌鑫电子有限公司 | Lithium battery charging secondary protection circuit |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106463991B (en) * | 2016-05-27 | 2020-12-18 | Oppo广东移动通信有限公司 | Battery protection plate, battery and mobile terminal |
| CN106463991A (en) * | 2016-05-27 | 2017-02-22 | 广东欧珀移动通信有限公司 | Battery protection board, battery and mobile terminal |
| US10644520B2 (en) | 2016-05-27 | 2020-05-05 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Battery protection board, battery and mobile terminal |
| CN108808630A (en) * | 2017-09-07 | 2018-11-13 | 惠州市德赛电池有限公司 | A kind of lithium ion battery protecting plate circuit |
| CN110391644B (en) * | 2018-04-19 | 2022-04-26 | 凹凸电子（武汉）有限公司 | Battery protection system, battery pack and protection method |
| US10978867B2 (en) | 2018-04-19 | 2021-04-13 | 02Micro Inc. | Battery protection systems |
| CN110391644A (en) * | 2018-04-19 | 2019-10-29 | 凹凸电子（武汉）有限公司 | Battery protection system, battery pack and guard method |
| WO2021223729A1 (en) * | 2020-05-07 | 2021-11-11 | 南京德朔实业有限公司 | Battery pack and electric tool system |
| CN114730925A (en) * | 2020-05-07 | 2022-07-08 | 南京泉峰科技有限公司 | Battery pack and electric tool system |
| CN112285463A (en) * | 2020-10-13 | 2021-01-29 | 安徽锐能科技有限公司 | Testing device and method for lithium battery protection board and storage medium |
| CN112838647B (en) * | 2021-02-26 | 2024-04-30 | 江西迪比科股份有限公司 | Lithium ion battery circuit with multiple protection functions |
| CN112838647A (en) * | 2021-02-26 | 2021-05-25 | 江西迪比科股份有限公司 | Lithium ion battery circuit with multiple protection functions |
| CN112918325A (en) * | 2021-03-25 | 2021-06-08 | 苏州联胜新能源科技有限公司 | Method for realizing kinetic energy recovery completely depending on lithium battery |
| CN112918325B (en) * | 2021-03-25 | 2024-05-03 | 苏州联胜新能源科技有限公司 | Method for realizing kinetic energy recovery by completely relying on lithium battery |
| CN113872303A (en) * | 2021-10-22 | 2021-12-31 | 北京小米移动软件有限公司 | Charging control method and device, electronic equipment and storage medium |
| CN114006433A (en) * | 2021-11-01 | 2022-02-01 | 长沙优力电驱动系统有限公司 | Battery device |
| CN115954987B (en) * | 2023-02-03 | 2023-11-03 | 深圳市凌鑫电子有限公司 | Secondary protection circuit for lithium battery charging |
| CN115954987A (en) * | 2023-02-03 | 2023-04-11 | 深圳市凌鑫电子有限公司 | Lithium battery charging secondary protection circuit |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160302 Termination date: 20180925 |