CN106532679B - A method of judging that battery group is reliably connected DC bus - Google Patents

A method of judging that battery group is reliably connected DC bus Download PDF

Info

Publication number
CN106532679B
CN106532679B CN201610941504.2A CN201610941504A CN106532679B CN 106532679 B CN106532679 B CN 106532679B CN 201610941504 A CN201610941504 A CN 201610941504A CN 106532679 B CN106532679 B CN 106532679B
Authority
CN
China
Prior art keywords
battery group
battery
bus
current
voltage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201610941504.2A
Other languages
Chinese (zh)
Other versions
CN106532679A (en
Inventor
韦江平
王鹏宇
周永兵
李先梧
俸梅
王雨生
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Longtan Hydropower Development Co Ltd Longtan Hydropower Plant
Original Assignee
Longtan Hydropower Development Co Ltd Longtan Hydropower Plant
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Longtan Hydropower Development Co Ltd Longtan Hydropower Plant filed Critical Longtan Hydropower Development Co Ltd Longtan Hydropower Plant
Priority to CN201610941504.2A priority Critical patent/CN106532679B/en
Publication of CN106532679A publication Critical patent/CN106532679A/en
Application granted granted Critical
Publication of CN106532679B publication Critical patent/CN106532679B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00Circuit arrangements for dc mains or dc distribution networks
    • H02J1/14Balancing the load in a network
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/382Arrangements for monitoring battery or accumulator variables, e.g. SoC

Abstract

The invention discloses a kind of methods that judgement battery group is reliably connected DC bus, it is to be connected by fuse (breaker), disconnecting switch with DC bus for direct current system battery group when operating normally, prevents battery from actually detaching the method for discrimination of DC bus;Charger output voltage is adjusted back by lower reconciliation, keep battery group end voltage down or up, measures battery current size and direction, judge battery group whether in electric discharge or charged state, and then judge whether battery group is reliably connected to DC bus, if exist and be detached from DC bus phenomenon.Method of the invention is not in the case where changing original measuring device, DC bus whether can be reliably connected to battery group to judge, effectively prevent being detached from the problems such as causing the danger of DC bus decompression and the life of storage battery to greatly shorten due to DC bus is run because of battery group.

Description

A method of judging that battery group is reliably connected DC bus
Technical field
The invention belongs to direct current system technical field in electric system, especially a kind of judgement battery group is reliably connected directly The method for flowing bus prevents battery group to be detached from the technical measures of DC bus.
Background technique
For in electric system direct current system operate normally in due to battery pack open circuit or battery outlet disconnecting link virtual connection lead It causes battery to actually detach DC bus, when DC charging motor failure or power supply disappearance, DC bus can not be provided Power supply causes DC bus decompression problem, and electrical secondary equipment is out of service, influences electrical primary equipment safety and stablizes fortune Row.Battery group is detached from DC bus operation for a long time, and floating bulk charge can not be carried out to battery group, and battery group self discharge stores The long-term charge less electricity condition of battery, accumulator capacity decline, causes the service life to greatly shorten.
Charger is less than the battery group rated capacity for 0.01 times, people to the floating current of battery group when normal at present All judge method that battery group is reliably connected DC bus with this floating current size, however floating current very little at this time, The meter range for measuring electric current is bigger, and usually not in the meter error range of measurement electric current, measurement electric current inaccuracy can not Reliably judge that battery is reliably connected DC bus, or even causes erroneous judgement.
Therefore, battery group is detached from DC bus in order to prevent, is badly in need of adopting in the case where existing equipment is constant in the market Ensure to judge that battery group is reliably connected DC bus with a kind of new judgment method, prevents from being detached from bus operation because of battery And the problem of causing the danger of DC bus decompression and the life of storage battery to greatly shorten.
Summary of the invention
It is an object of the invention to be directed to some shortcomings existing in the prior art, providing a kind of judgement battery group can Method by connecting DC bus.Method of the invention is to pass through fuse for direct current system battery group when operating normally (breaker), disconnecting switch are connected with DC bus, prevent battery from actually detaching the method for discrimination of DC bus;It is not In the case where changing original measuring device, so that it may judge whether battery group is reliably connected DC bus, effectively It prevents and causes the danger of DC bus decompression and the life of storage battery to greatly shorten because battery group is detached from DC bus operation Problem occurs.
To achieve the goals above, the invention adopts the following technical scheme:
A method of judging that battery group is reliably connected DC bus, charger output voltage adjusted back by lower reconciliation, Keep battery group end voltage down or up, measures battery current size and direction, judge whether battery group is discharging Or charged state, and then judge whether battery group is reliably connected to DC bus, if exist and is detached from DC bus phenomenon;Tool The step of body are as follows:
Firstly, declining battery group end voltage by lowering charger output voltage, battery current size is measured And direction, judge battery group whether in discharge condition;It specifically includes:
(1) charger output voltage is lowered
Charger output voltage is controlled by being adjusted to (1-K) * Ue under normal operating voltage Ue, wherein K=0.009~0.035; Then battery current Ifd is measured;
(2) differentiate whether battery group is in reliable discharge condition
Work as battery current | Ifd | maximum value is not less than 2*C*Ict, and the direction Ifd is negative, then judges battery group Electric current is discharge current, and battery group is in discharge condition, and preliminary judgement battery group is reliably connected to DC bus, is not present It is detached from DC bus phenomenon;Conversely, battery group is there may be DC bus phenomenon is detached from, readjustment charger is defeated in next step for progress Voltage is judged out;
Wherein: C is the meter error amount for measuring battery current, and Ict is the maximum range for measuring battery current, Unit is A;Meanwhile setting battery current and being negative from battery group anode outflow direction, from battery group anode inflow side To being positive;
Secondly, battery group end voltage rises by readjustment charger output voltage, it is big by measurement battery current Whether small and direction judges battery group in charged state;It specifically includes:
1. adjusting back charger output voltage
It is normal operating voltage Ue that charger output voltage, which is controlled, by (1-K) * Ue readjustment;Then battery current is measured I'fd;
2. differentiating whether battery group is in reliable charged state
Work as battery current | I ' fd | maximum value is not less than 2*C*Ict, and the direction I ' fd is positive, then judges battery Group electric current is charging current, and battery group is in charged state, and battery group is reliably connected to DC bus, straight there is no being detached from Flow bus phenomenon;Conversely, determining that battery group is not reliably connected to DC bus, exists and be detached from DC bus phenomenon.
In addition, the present invention can also be judged by adjusting back charger transmission voltage again after up-regulation;That is: pass through control Charger is changed to even charging voltage by float charge voltage and restores float charge voltage, rises or falls battery group end voltage, passes through meter Calculate machine monitoring systematic survey battery current size and direction, judge battery group whether in charge or discharge state, in turn Judge whether battery group is reliably connected to DC bus, if exist and be detached from DC bus phenomenon;Specific step are as follows:
Firstly, up-regulation charger output voltage, i.e., be changed to float charge voltage by even charging voltage, battery group end voltage rises, Battery current size and direction are measured by computer supervisory control system, judges battery group whether in charged state;Specifically Including
(1) charger output voltage is raised:
Charger output voltage is controlled by being adjusted to (1+K) * Ue on normal operating voltage Ue, wherein K=0.009~0.035; Then battery current Ifd is detected by computer supervisory control system;
(2) differentiate whether battery group is in reliable charged state
Work as battery current | Ifd | maximum value is not less than 2*C*Ict, and the direction Ifd is positive, then judges battery group Electric current is charging current, and battery group is in charged state, and preliminary judgement battery group is reliably connected to DC bus, is not present It is detached from DC bus phenomenon;Conversely, battery group is there may be DC bus phenomenon is detached from, readjustment charger is defeated in next step for progress Voltage is judged out;
Wherein: C is the meter error amount for measuring battery current, and Ict is the maximum range for measuring battery current, Unit is A;Meanwhile setting battery current and being negative from battery group anode outflow direction, from battery group anode inflow side To being positive;
Secondly, readjustment charger output voltage, switchs to float charge voltage by even charging voltage, the decline of battery group end voltage is led to Computer supervisory control system measurement battery current size and direction are crossed, judges battery group whether in charged state;Specific packet It includes:
1. adjusting back charger output voltage
It is normal operating voltage Ue that charger output voltage, which is controlled, by (1+K) * Ue readjustment;Then pass through computer monitoring system System detection battery current I ' fd;
2. differentiating whether battery group is in reliable charged state
Work as battery current | I ' fd | maximum value is not less than 2*C*Ict, and the direction I ' fd is negative, then judges battery Group electric current is discharge current, and battery group is in discharge condition, determines that battery group is reliably connected to DC bus, there is no de- From DC bus phenomenon;Conversely, determining that battery group is not reliably connected to DC bus, exists and be detached from DC bus phenomenon.
In the present invention, as long as meeting battery charging state and/or discharge condition requirement, judge that battery group can By being connected to DC bus, there is no be detached from DC bus phenomenon;If battery charging state and discharge condition is not satisfied It is required that then judging that battery group is not reliably connected to DC bus, exists and be detached from DC bus phenomenon.
Advantages of the present invention:
1. the present invention adjusts back charger output voltage by lower reconciliation, battery group end voltage is adjusted, battery is allowed to distinguish Electric discharge and charging are primary, in the error range of measurement meter, differentiate that battery group is in electric discharge and charged state really, thus Judge that battery group is reliably connected to the method for DC bus.This method with high security, high reliablity, high sensitivity, spirit The advantages that activity is big, simple, there is very big live practical application promotional value.
2. method of the invention does not change the structure and wiring of original equipment, the investment of equipment cost is not increased.
Detailed description of the invention
Fig. 1 is involved DC bus system structural schematic diagram in the present invention.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
Embodiment 1:
As shown in Figure 1, direct current 220V system, one group of charger and a group storage battery group attach to same direct current 220V simultaneously On bus, charger powers to battery group and DC load with float charge voltage 234V when normal;Battery group capacity is 420Ah.Battery group measurement ammeter is calculated as current divider FL-2/150A/75mV/0.5%.
Firstly, pressing definite value by control charger floating charge, charger output voltage is lowered, is made under the voltage of battery group end Whether drop measures battery current size and direction, judges battery group in discharge condition;It specifically includes:
(1) charger output voltage is lowered
Control charger output voltage by be adjusted under normal operating voltage Ue=234V (1-K) * Ue=(1-0.009) * 234= 231.9V, wherein K=0.009;Then measurement battery current Ifd is -10.1A;
(2) differentiate whether battery group is in reliable discharge condition
Work as battery current | Ifd | maximum value (for 10.1A) is not less than 2*C*Ict=2*0.005*150=1.5, and The direction Ifd is negative, then judges battery current for discharge current, battery is in discharge condition;Preliminary conclusion: battery group It is reliably connected to DC bus, there is no be detached from DC bus phenomenon;
Wherein: C is the meter error amount for measuring battery current, and Ict is the maximum range for measuring battery current, Unit is A;Meanwhile setting battery current and being negative from battery group anode outflow direction, from battery group anode inflow side To being positive;
Secondly, battery group end voltage rises by readjustment charger output voltage, it is big by measurement battery current Whether small and direction judges battery group in charged state;It specifically includes:
1. adjusting back charger output voltage
It is normal operating voltage Ue-234V that charger output voltage, which is controlled, by (1-K) * Ue=231.9V readjustment;Then it measures Battery current I ' fd is+6.1A;
2. differentiating whether battery group is in reliable charged state
Work as battery current | I ' fd | maximum value (for 6.1A) is not less than 2*C*Ict=1.5, and the direction I ' fd is positive, Judge battery current then for charging current, battery group is in charged state;
Final conclusion: the present embodiment meets battery charging and discharge condition requirement simultaneously, and battery group is reliably connected To DC bus, there is no be detached from DC bus phenomenon.
Embodiment 2:
Direct current 220V system, one group of charger and a group storage battery group attach on same direct current 220V bus simultaneously, just Charger powers to battery group and DC load with float charge voltage 234V when often;Battery group capacity is 420Ah;Battery group Measurement ammeter is calculated as current divider FL-2/150A/75mV/0.5%.
Battery group was filled once in charger regular 90 days, i.e., control charger is automatically changed to bulk charge by float charge voltage Pressure and automatic recovery float charge voltage are primary.
Firstly, up-regulation charger output voltage, is automatically changed to float charge voltage by even charging voltage, on the voltage of battery group end It rises, battery current size direction is measured by computer supervisory control system, is judged whether in battery state of charge;Specific packet It includes:
(1) charger output voltage is raised:
Control charger output voltage by be adjusted on normal operating voltage 234V (1+K) * 234=(1+0.035) * 234= 242.2V;K=0.035;Computer supervisory control system detect battery current Ifd be+10.5A.
(2) differentiate whether battery group is in reliable charged state
Work as battery current | Ifd | maximum value=10.5A is not less than 2*C*Ict=2*0.005*150=1.5, and Ifd Direction is positive, then judges battery current for charging current, and battery is in charged state, can preliminary judgement battery group It is reliably connected to DC bus, there is no be detached from direct current;
Wherein: C is the meter error amount for measuring battery current, and Ict is the maximum range for measuring battery current, Unit is A;Meanwhile setting battery current and being negative from battery group anode outflow direction, from battery group anode inflow side To being positive;
Secondly, readjustment charger output voltage, switchs to float charge voltage by even charging voltage, under the voltage of battery group end automatically Drop measures battery current size and direction by computer supervisory control system, judges whether in battery state of charge;Specifically Include:
1. adjusting back charger output voltage
Charger output voltage is controlled by * 234=242.2V of (1+K) * 234=(1+0.035);The downward of K=0.035 is normal Working voltage 234V;Measurement battery current Ifd is -9.9A;
2. differentiating whether battery group is in reliable charged state
Work as battery current | I ' fd | maximum value 9.9A is not less than 2*C*Ict=2*0.005*150=1.5, and I ' fd Direction is negative, then judges battery current for discharge current, battery is in discharge condition;
Final conclusion: the present embodiment meets battery charging and discharge condition requirement simultaneously, and battery group is reliably connected To DC bus, there is no be detached from direct current phenomenon.

Claims (2)

1. a kind of method that judgement battery group is reliably connected DC bus, it is characterized in that: it is defeated to adjust back charger by lower reconciliation Voltage out keeps battery group end voltage down or up, measures battery current size and direction, whether judges battery group In electric discharge or charged state, and then judge whether battery group is reliably connected to DC bus, if there are disengaging DC bus Phenomenon;Specific step are as follows:
Firstly, declining battery group end voltage by lowering charger output voltage, battery current size and side are measured To judging battery group whether in discharge condition;It specifically includes:
(1) charger output voltage is lowered
Charger output voltage is controlled by being adjusted to (1-K) * Ue under normal operating voltage Ue, wherein K=0.009~0.035;Then Measure battery current Ifd;
(2) differentiate whether battery group is in reliable discharge condition
Work as battery current | Ifd | maximum value is not less than 2*C*Ict, and the direction Ifd is negative, then judges battery current For discharge current, battery group is in discharge condition, and preliminary judgement battery group is reliably connected to DC bus, and there is no be detached from DC bus phenomenon;Conversely, battery group there may be DC bus phenomenon is detached from, carries out readjustment charger output electricity in next step Judged again after pressure;
Wherein: C is the meter error amount for measuring battery current, and Ict is the maximum range for measuring battery current, unit For A;Meanwhile setting battery current and being negative from battery group anode outflow direction, it is from battery group anode inflow direction Just;
Secondly, by readjustment charger output voltage, battery group end voltage rise, by measurement battery current size and Whether direction judges battery group in charged state;It specifically includes:
1. adjusting back charger output voltage
It is normal operating voltage Ue that charger output voltage, which is controlled, by (1-K) * Ue readjustment;Then battery current I ' is measured fd;
2. differentiating whether battery group is in reliable charged state
Work as battery current | I ' fd | maximum value is not less than 2*C*Ict, and the direction I ' fd is positive, then judges battery group electricity Stream is charging current, and battery group is in charged state, determines that battery group is reliably connected to DC bus, straight there is no being detached from Flow bus phenomenon;Conversely, determining that battery group is not reliably connected to DC bus, exists and be detached from DC bus phenomenon.
2. a kind of method that judgement battery group is reliably connected DC bus, it is characterized in that: by control charger by floating charging Pressure is changed to even charging voltage and restores float charge voltage, rises or falls battery group end voltage, is surveyed by computer supervisory control system Battery current size and direction are measured, judges that battery group whether in charge or discharge state, and then judges that battery group is It is no to be reliably connected to DC bus, if to exist and be detached from DC bus phenomenon;Specific step are as follows:
Firstly, up-regulation charger output voltage, i.e., be changed to even charging voltage by float charge voltage, battery group end voltage rises, passes through Whether computer supervisory control system measures battery current size and direction, judge battery group in charged state;It specifically includes
(1) charger output voltage is raised:
Charger output voltage is controlled by being adjusted to (1+K) * Ue on normal operating voltage Ue, wherein K=0.009~0.035;Then Battery current Ifd is detected by computer supervisory control system;
(2) differentiate whether battery group is in reliable charged state
Work as battery current | Ifd | maximum value is not less than 2*C*Ict, and the direction Ifd is positive, then judges battery current For charging current, battery group is in charged state, and preliminary judgement battery group is reliably connected to DC bus, and there is no be detached from DC bus phenomenon;Conversely, battery group there may be DC bus phenomenon is detached from, carries out readjustment charger output electricity in next step Judged again after pressure;
Wherein: C is the meter error amount for measuring battery current, and Ict is the maximum range for measuring battery current, unit For A;Meanwhile setting battery current and being negative from battery group anode outflow direction, it is from battery group anode inflow direction Just;
Secondly, readjustment charger output voltage, switchs to float charge voltage by even charging voltage, the decline of battery group end voltage passes through meter Machine monitoring systematic survey battery current size and direction are calculated, judges battery group whether in discharge condition;It specifically includes:
1. adjusting back charger output voltage
It is normal operating voltage Ue that charger output voltage, which is controlled, by (1+K) * Ue readjustment;Then it is examined by computer supervisory control system Survey battery current I ' fd;
2. differentiating whether battery group is in reliable discharge condition
Work as battery current | I ' fd | maximum value is not less than 2*C*Ict, and the direction I ' fd is negative, then judges battery group electricity Stream is discharge current, and battery group is in discharge condition, determines that battery group is reliably connected to DC bus, straight there is no being detached from Flow bus phenomenon;Conversely, determining that battery group is not reliably connected to DC bus, exists and be detached from DC bus phenomenon.
CN201610941504.2A 2016-11-02 2016-11-02 A method of judging that battery group is reliably connected DC bus Active CN106532679B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610941504.2A CN106532679B (en) 2016-11-02 2016-11-02 A method of judging that battery group is reliably connected DC bus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610941504.2A CN106532679B (en) 2016-11-02 2016-11-02 A method of judging that battery group is reliably connected DC bus

Publications (2)

Publication Number Publication Date
CN106532679A CN106532679A (en) 2017-03-22
CN106532679B true CN106532679B (en) 2019-05-03

Family

ID=58293031

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610941504.2A Active CN106532679B (en) 2016-11-02 2016-11-02 A method of judging that battery group is reliably connected DC bus

Country Status (1)

Country Link
CN (1) CN106532679B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109143088B (en) * 2018-08-02 2021-02-23 国网山西省电力公司忻州供电公司 DC storage battery monitoring device
CN108957344B (en) * 2018-08-02 2020-11-03 国网山西省电力公司忻州供电公司 DC storage battery on-line monitoring method
CN109884535A (en) * 2019-03-26 2019-06-14 国网北京市电力公司 The detection method and device of battery group
CN110794342B (en) * 2019-11-26 2021-08-31 广东电网有限责任公司东莞供电局 Monitoring system for separating DC storage battery from bus for station and control method thereof
CN111948548A (en) * 2020-06-23 2020-11-17 广东电网有限责任公司 System for detecting storage battery pack without power interruption

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6046573A (en) * 1995-10-31 2000-04-04 Xicon Battery Electronics Ab System for equalizing the level of charge in batteries
CN102403768A (en) * 2011-11-26 2012-04-04 河南省电力公司新乡供电公司 On-line testing and nuclear capacity discharging device for direct-current storage battery of transformer station
CN103033759A (en) * 2012-12-11 2013-04-10 上海市电力公司 Storage battery thermal runway intelligent judgment method
CN205353322U (en) * 2016-02-24 2016-06-29 国家电网公司 Online capability test device of electric power storage battery
CN105896711A (en) * 2016-05-20 2016-08-24 国网江苏省电力公司镇江供电公司 Online capacity checking device for storage batteries

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6046573A (en) * 1995-10-31 2000-04-04 Xicon Battery Electronics Ab System for equalizing the level of charge in batteries
CN102403768A (en) * 2011-11-26 2012-04-04 河南省电力公司新乡供电公司 On-line testing and nuclear capacity discharging device for direct-current storage battery of transformer station
CN103033759A (en) * 2012-12-11 2013-04-10 上海市电力公司 Storage battery thermal runway intelligent judgment method
CN205353322U (en) * 2016-02-24 2016-06-29 国家电网公司 Online capability test device of electric power storage battery
CN105896711A (en) * 2016-05-20 2016-08-24 国网江苏省电力公司镇江供电公司 Online capacity checking device for storage batteries

Also Published As

Publication number Publication date
CN106532679A (en) 2017-03-22

Similar Documents

Publication Publication Date Title
CN106532679B (en) A method of judging that battery group is reliably connected DC bus
CN105449790B (en) A kind of intelligent battery group and control method
CN105978093B (en) A kind of mobile terminal
CN105429226B (en) Large capacity charge-discharge battery manages system
CN103311965B (en) Batteries in parallel connection group discharge and recharge intelligent management apapratus and method
CN204597507U (en) A kind of battery management control system being provided with redundancy voltage and current detection circuit
CN202474986U (en) Charge circuit for lithium-ion battery pack
CN106646037B (en) A kind of direct current system real-time detection method for substation
CN101539612A (en) System for on-line monitoring of running quality of battery
WO2016183076A1 (en) System and method for monitoring a dc power system
CN103475054A (en) Intelligently-controlled lithium battery charger and charging control method
CN112462289A (en) Storage battery pack online capacity checking management device
CN106199457A (en) The on-line quick detection apparatus and method of open-circuit cell in accumulator battery
CN206892292U (en) A kind of batteries main fuse fusing and open circuit detecting device
CN104155609A (en) Maintenance-free lead-acid storage battery nondestructive testing method and nondestructive testing instrument
CN207459754U (en) A kind of charging management system of lithium battery
CN102608371B (en) Storage battery detecting device and undervoltage protection method thereof
CN109100602A (en) A kind of online test method of battery group open-circuit fault
CN105429225A (en) Dynamic balance circuit for battery management system and dynamic balance method for battery management system
CN102608538A (en) Capacity online reckoning system for storage battery
CN106549177B (en) A kind of flow battery and SOC metering method based on SOC detection device Redundancy Design
CN102647013A (en) Charge control and protection method for storage battery
CN209088564U (en) A kind of DC power system
CN103490108A (en) Novel safety management method and device for power battery pack of electric vehicle
CN207008031U (en) A kind of batteries charging and discharging currents monitoring system

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant