CN115833330B - Battery management system suitable for communication base station - Google Patents
Battery management system suitable for communication base station Download PDFInfo
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- CN115833330B CN115833330B CN202310024489.5A CN202310024489A CN115833330B CN 115833330 B CN115833330 B CN 115833330B CN 202310024489 A CN202310024489 A CN 202310024489A CN 115833330 B CN115833330 B CN 115833330B
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- 238000004891 communication Methods 0.000 title claims abstract description 42
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 claims abstract description 98
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 88
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- 238000012544 monitoring process Methods 0.000 claims description 9
- 230000036541 health Effects 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 4
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a battery management system suitable for a communication base station, which comprises: the system comprises a battery management module, a communication module, a main control module, a DCDC bidirectional module and a data acquisition module. The number of the DCDC bidirectional modules and the number of the data acquisition modules are multiple, and each DCDC bidirectional module is connected with one data acquisition module; the main control module is respectively connected with each data acquisition module and each DCDC bidirectional module, and the DCDC bidirectional modules are connected with the busbar and the lead-acid battery pack. The main control module is respectively connected with each data acquisition module and each DCDC bidirectional module. Through the one-to-one data acquisition of the battery packs, each battery pack is charged and discharged in a proper amount, the damage to each battery is reduced, the service life of the battery is prolonged, and therefore the operation cost of the communication base station is reduced.
Description
Technical Field
The invention relates to the technical field of power systems, in particular to a battery management system suitable for a communication base station.
Background
In order to ensure that a communication base station provides uninterrupted service to users, various electrical devices (loads) need to be ensured to operate uninterruptedly. Under the condition of normal power supply of an alternating current power supply (commercial power), the battery packs can be charged, and when power is cut off, the battery packs need to be quickly switched to supply power for loads.
In the actual situation, the plurality of battery packs used by the communication base station are usually different, and the main differences are different in battery type, nominal voltage and old and new degree, such as: various battery packs have different rated capacities, lead-acid batteries and lithium batteries, new various battery packs coexist, various battery packs that have been used for a certain period of time, and so on. If these individual battery packs are used in a unified manner, they are supplied with power or charged in a unified manner, such as: during charging, all the battery packs are charged simultaneously by uniform charging current or are charged in sequence; when each battery pack is required to be in a power supply state, each battery pack is enabled to discharge in sequence, the actual states of the whole battery pack and single batteries in the battery pack are ignored, the battery is over-charged or insufficiently discharged, and then each battery pack is damaged, so that the service life is shortened, and the risk of the operation cost of the communication base station is increased.
Disclosure of Invention
Based on the above, the technical problem to be solved by the invention is to overcome the defects that in the prior art, the battery is over-charged or insufficiently discharged, and then each battery pack is damaged, so that the service life is shortened, and the operation cost of the communication base station is increased.
In order to achieve the purpose, the invention provides the following technical scheme:
in a first aspect, an embodiment of the present invention provides a battery management system applicable to a communication base station, where the battery management system is applied to a lead-acid battery management system, and the battery management system includes: a battery management module, a communication module, a main control module, a DCDC bidirectional module and a data acquisition module, wherein
The number of the DCDC bidirectional modules and the number of the data acquisition modules are multiple, and each DCDC bidirectional module is connected with one data acquisition module; the master control module is respectively connected with each data acquisition module and each DCDC bidirectional module, and the DCDC bidirectional module is connected with a busbar and a lead-acid battery pack for standby power of a communication base station;
the main control module is used for determining charging parameters and discharging parameters according to the acquired data, sending a charging instruction to the DCDC bidirectional module according to the charging parameters, and sending a discharging instruction to the DCDC bidirectional module according to the discharging parameters, wherein the charging parameters comprise: charging current limiting value I L Voltage equalizing U e Float voltage U f Limit of uniform charging time T e Uniform floating current I e-f Time limit T for uniform rotation and floating e-f Float and rotate the uniform current I f-e Time limit T for equal floating and rotating f-e (ii) a The discharge parameters include: current I of switch power supply 0 Discharge start current I f-s Core capacity SOC and load current i of battery pack L ；
The DCDC bidirectional module is used for executing the charging instruction so as to charge the connected battery pack by using a switch power supply connected with the busbar and executing the discharging instruction so as to supply power to a communication base station load connected with the busbar by using the connected battery pack;
and the data acquisition module is used for acquiring voltage data of each battery pack.
Optionally, the data acquisition module is used for acquiring the overall voltage U of the battery pack B And cell voltage U bn (ii) a The master control module is used for controlling the overall voltage U B And the cell voltage U bn Determining the charging current limit value I L Wherein when saidBulk voltage U B Less than a first preset integral voltage, the cell voltage U bn When the voltage is less than the preset single voltage, the charging current limiting value I L For a predetermined mean charge current-limiting value I e * A predetermined coefficient when the overall voltage U is B When the voltage is larger than a second preset integral voltage, the charging current limiting value I L For a predetermined mean charge current-limiting value I e 。
Optionally, the main control module is configured to perform the following operations to control a charging process of the DCDC bidirectional module:
sending a uniform charging instruction to the DCDC bidirectional module to enable the DCDC bidirectional module to be in a constant-voltage current-limiting state, and starting uniform charging timing;
monitoring the bulk voltage U B Whether the equalizing charge voltage U is reached e And a charging current I C Whether or not less than uniform floating current I e-f ；
When the integral voltage U is B To the uniform charging voltage U e And a charging current I C Less than uniform floating current I e-f When the time is up, the time of the uniform floating time is started;
judging the time t of uniform charging e Whether the equalizing charge time limit T is reached e Or time of uniform floating e-f Whether the time limit T of the uniform rotation and floating is reached e-f ；
When the time t is uniformly charged e Reach the equalized charging time limit T e Or time of uniform floating e-f Limit T for reaching uniform floating time e-f When the DCDC bidirectional module is in use, a floating charge instruction is sent to the DCDC bidirectional module;
monitoring charging current I in the float charging process C Whether the floating average current I is reached f-e ；
When charging current I C To achieve said float average current I f-e Then, the float-rotation average timing is started, and t is counted in the float-rotation average timing f-e Reach the float-rotation average time limit T f-e And sending a uniform charging instruction to the DCDC bidirectional module.
Optionally, the main control module performs a charging action according to the cell voltage U during the DCDC bi-directional module bn Adjusting the equalizing charge voltage U e And a floating voltage U f ；
The main control module monitors the single battery voltage U bn Whether the voltage limit of the cell U is reached bmax ；
When the voltage U of the battery cell bn Reach the cell voltage limit U bmax Then, after a first delay time, the equalizing charge voltage U is reduced e And/or float voltage U f ；
When the voltage U of the battery cell bn Fall back to the cell voltage limit U bmax When the voltage U is increased after the second delay time e And/or float voltage U f Wherein the second delay time is greater than the first delay time.
Optionally, the main control module performs a charging action according to the charging current I in the DCDC bidirectional module C Bus bar voltage U 0 And the switching supply current I 0 Determining the charging current limit value I L 。
Optionally, the main control module gradually increases the charging current I from the start of charging C (ii) a Determining the switching supply current I 0 Constant bus voltage U 0 Reducing the charging current I to a predetermined value C And calculating therefrom a charging current limit value I L 。
Optionally, the method further comprises: the switching power supply comprises a main control sub-circuit, wherein the main control sub-circuit acquires the total output current of the switching power supply through a Hall sensor, when the battery pack discharges, the power supply recovers to supply power, and when a first preset condition is met, the main control sub-circuit sends a constant-voltage current-limiting charging instruction to a corresponding DCDC bidirectional module through a CAN bus.
Optionally, in the automatic operation mode, when the power supply current I is switched 0 Less than the discharge start current I f-s When the battery management system judges the alternating current outage, the master control module sends a discharging instruction to the corresponding DCDC bidirectional module through the CAN bus, and the DCDC bidirectional module is converted to a discharging state.
Optionally, the DCDC bi-directional module includes: a DCDC bidirectional control circuit, wherein the DCDC bidirectional control circuit comprises: a first control sub-circuit (T1), a second control sub-circuit (T2), a battery, a load (RL),
the first end of the first control sub-circuit (T1) is respectively connected with the anode of the battery and one end of the load (RL), the second end of the first control sub-circuit (T1) is respectively connected with the cathode of the battery and the first end of the second control sub-circuit (T2), and the third end of the first control sub-circuit (T1) is respectively connected with the other end of the load (RL) and the second end of the second control sub-circuit (T2).
Optionally, a first control sub-circuit (T1) is used for a boost constant voltage discharge mode and/or a constant current discharge mode, the first control sub-circuit (T1) comprising: a first capacitor (C1), a second capacitor (C2), an inductor (L1), a first MOS transistor (Q11), a second MOS transistor (Q12), a third MOS transistor (Q13) and a fourth MOS transistor (Q14), wherein,
one end of the inductor (L1) is connected with a source of the first MOS transistor (Q11) and a drain of the second MOS transistor (Q12) respectively, and the other end of the inductor (L1) is connected with a source of the third MOS transistor (Q13) and a drain of the fourth MOS transistor (Q14) respectively;
the drain of the first MOS tube (Q11) is respectively connected with the anode of the battery, one end of the first capacitor (C1), the drain of the third MOS tube (Q13), one end of the second capacitor (C2) and one end of the load (RL);
the source of the second MOS tube (Q12) is respectively connected with the other end of the first capacitor (C1), the cathode of the battery and the first end of the second control sub-circuit (T2) and is grounded;
and the source of the fourth MOS transistor (Q14) is respectively connected with the other end of the second capacitor (C2), the other end of the load (RL) and the second end of the second control sub-circuit (T2) and is grounded.
Optionally, the second control sub-circuit (T2) comprises: a fifth MOS transistor (Q21), a sixth MOS transistor (Q22), a diode (D1) and a switch control sub-circuit (T3),
the first end of the switch control sub-circuit (T3) is respectively connected with the cathode of the diode (D1), the drain of the fifth MOS tube (Q21) and the cathode of the battery;
the second end of the switch control sub-circuit (T3) is respectively connected with the drain of the sixth MOS tube (Q22) and the other end of the load (RL);
the anode of the diode (D1) is respectively connected with the source of the fifth MOS tube (Q21) and the source of the sixth MOS tube (Q22);
when the second control sub-circuit (T2) works, the sixth MOS tube (Q22) is conducted, when the first control sub-circuit (T1) reaches a preset target current limiting value, the fifth MOS tube (Q21) is conducted, the switch control sub-circuit (T3) is conducted, and the fifth MOS tube (Q21) and the sixth MOS tube (Q22) are closed.
Optionally, the switch control sub-circuit (T3) comprises: a switch (K1), a coil, wherein,
the cathode of the diode (D1) is connected with the drain of the sixth MOS tube (Q22) through a switch.
Alternatively, when the first control sub-circuit (T1) fails, the current is discharged through the second control sub-circuit (T2).
Optionally, the main control module dynamically adjusts output current of each battery according to the capacity data and actual load of each battery set, and discharge is realized through the output current.
Optionally, the health degree of each battery is determined according to the core capacity result.
Alternatively, the power supply current I is switched on or off after AC interruption 0 The output current is gradually reduced, when the current is smaller than a first preset current, the sixth MOS tube (Q22) is triggered to be conducted, the load on the busbar side is formed into a discharge loop by the battery through the anode bar, the sixth MOS tube (Q22), the diode (D1), the fifth MOS tube (Q21) and the diode (D1), and the load power supply is guaranteed not to be flashed.
Optionally, the main control module is configured to perform the following operations to control a discharging process of the DCDC bi-directional module: the main control module is i according to the SOC and the load current of each battery pack L And dynamically adjusting the output current of each battery pack to meet the discharge requirement, wherein in the discharge process of the battery, the main control module dynamically calculates the residual capacity of each battery pack, and the discharge current of the ith battery pack isi L *[SOC i /(SOC 1 +SOC 2 +...SOC n )]Wherein SOC is 1 ..SOC n For the result of the capacity of each battery, SOC i Refers to the capacity results of the ith battery pack.
Alternatively, when the battery voltage is greater than the preset battery voltage, the SOC is set to zero 1 When the value is larger than a first preset value, a first control sub-circuit (T1) of the first battery pack works in a constant current discharge mode, and a second control sub-circuit (T2) of the first battery pack does not work; the first control sub-circuit (T1) of the second battery pack module does not work, and the second control sub-circuit (T2) of the second battery pack works; when SOC is reached 1 When the voltage is smaller than a first preset value, a first control sub-circuit (T1) of the second battery pack works in a constant current discharge mode, and a second control sub-circuit (T2) of the second battery pack does not work; the first control sub-circuit (T1) of the first battery pack does not work, the second control sub-circuit (T2) of the first battery pack works, and the two battery packs work alternately.
Optionally, when the voltage of any battery pack is less than or equal to the preset voltage, the second control sub-circuits (T2) of the two battery pack modules do not work, the first control sub-circuit (T1) of the first battery pack works in a boost constant voltage mode, and the second control sub-circuit (T2) of the second battery pack works in a constant current mode.
The technical scheme of the invention has the following advantages:
1. the invention provides a battery management system suitable for a communication base station, which is characterized in that a plurality of DCDC bidirectional modules and a plurality of data acquisition modules are arranged, and each DCDC bidirectional module is connected with one data acquisition module; the main control module is respectively connected with each data acquisition module and each DCDC bidirectional module, and the DCDC bidirectional modules are connected with the busbar and the lead-acid battery pack. The main control module is respectively connected with each data acquisition module and each DCDC bidirectional module. Through the one-to-one data acquisition of the battery packs, each battery pack is charged and discharged in a proper amount, the damage to each battery is reduced, the service life of the battery is prolonged, and therefore the operation cost of the communication base station is reduced.
2. Due to the existence of the second control sub-circuit, when the first control sub-circuit is in fault, the current is discharged through the second control sub-circuit, and therefore the stability of power backup of the base station equipment during alternating current power failure is effectively guaranteed.
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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a block diagram of a specific example of a battery management system suitable for a communication base station according to an embodiment of the present invention;
fig. 2 is a circuit diagram of another specific example of the DCDC bidirectional control circuit according to the embodiment of the present invention;
fig. 3 is a flowchart of a specific example of an online capacity checking method for preparing power for a lead-acid battery according to an embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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.
In the description of the present invention, it should be noted that the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
The embodiment of the invention provides a battery management system suitable for a communication base station, which is used for prolonging the service life of each battery pack of the communication base station.
As shown in fig. 1, the battery management system of the communication base station includes: the system comprises a battery management module, a communication module, a main control module, a DCDC bidirectional module and a data acquisition module.
The DCDC bidirectional module and the data acquisition module are provided with a plurality of modules, and each DCDC bidirectional module is connected with one data acquisition module. The master control module is respectively connected with each data acquisition module and each DCDC bidirectional module, and the DCDC bidirectional modules are connected with a busbar and a lead-acid battery pack for standby power of a communication base station. The main control module is respectively connected with each data acquisition module and each DCDC bidirectional module. Through the one-to-one data acquisition of the battery packs, each battery pack is charged and discharged in a proper amount, the damage to each battery is reduced, the service life of the battery is prolonged, and therefore the operation cost of the communication base station is reduced.
In the embodiment of the invention, the battery management module manages each battery pack of the communication base station through the communication module. The management comprises the following steps: charging, discharging, online testing each battery pack, ac power failure management, and personalized management, which are only examples, but not limited to these, and corresponding management is performed according to actual requirements in practical applications. For example: uploading the acquired data or the analyzed data to a battery management module in real time to realize the storage and query of the data; the remote signaling, remote measurement, remote control and remote regulation are realized, the remote measurement data can be classified and stored, and the real-time inquiry and the subsequent data analysis are facilitated.
The personalized management comprises the following steps: meanwhile, a set of user interfaces is provided, so that a user can access the contents such as real-time test data, historical test data and the like in a webpage mode and present different contents according to different user rights. And a corresponding management mode is formulated according to the user requirements, so that the use is flexible and convenient.
In the embodiment of the invention, the communication module is used for data transmission between the battery management module and the main control module. For example, the 4G internet of things module is selected as a link for data communication between the battery management module and the main control module, and a path is provided for data interaction between the battery management module and the main control module. By way of example only, and not by way of limitation, in practical applications, a corresponding communication network is selected according to actual requirements.
In the embodiment of the invention, the main control module is used for determining the charging parameters and the discharging parameters according to the acquired data, sending a charging instruction to the DCDC bidirectional module according to the charging parameters, and sending a discharging instruction to the DCDC bidirectional module according to the discharging parameters.
The charging parameters include: charging current limiting value I L Voltage equalizing U e Float voltage U f Time limit of uniform charging T e Uniform floating current I e-f Time limit T for uniform rotation and floating e-f Float and rotate the uniform current I f-e Float and rotate average time limit T f-e And a uniform charging period: and charging the lead-acid battery regularly to supplement the electric quantity loss caused by self-discharge of the lead-acid battery. The discharge parameters include: current I of switch power supply 0 Discharge start current I f-s Core capacity SOC and load current i of battery pack L 。
In the embodiment of the invention, the DCDC bidirectional module is used for executing the charging instruction, so that the connected battery pack is charged by using the switch power supply connected with the busbar, and executing the discharging instruction, so that the load connected with the busbar is supplied with power by using the connected battery pack. For example: the DCDC bidirectional module can adopt an ST 32-bit hybrid domain processor STM32G474 to complete charging and discharging control of each battery according to target charging and discharging voltage and charging and discharging current issued by the main control module.
In the embodiment of the invention, each data acquisition module corresponds to each battery pack and is used for acquiring the voltage data of each battery pack and providing data for charging, discharging and capacity checking of the main control module.
In the embodiment of the invention, the data acquisition module is used for acquiring the overall voltage U of the battery pack B And cell voltage U bn . The main control module is based on the integral voltage U B And cell voltage U bn Determining a charging current limiting value I L . When the integral voltage U is B Less than a first preset integral voltage, the single cell voltage U bn When the voltage is less than the preset single voltage, the charging current limiting value I L For a predetermined mean charge current-limiting value I e * PresetCoefficient of total voltage U B When the voltage is larger than a second preset integral voltage, the charging current limiting value I L For a predetermined mean charge current-limiting value I e 。
In the embodiment of the present invention, the main control module is configured to perform the following operations to control the charging process of the DCDC bidirectional module: and sending a uniform charging instruction to the DCDC bidirectional module to enable the DCDC bidirectional module to be in a constant-voltage current-limiting state, and starting uniform charging timing. Monitoring the bulk voltage U B Whether the uniform charging voltage U is reached e And a charging current I C Whether or not less than uniform floating current I e-f . When the integral voltage U B To achieve the uniform charging voltage U e And a charging current I C Less than uniform floating current I e-f And starting the time counting of the uniform floating time. Judging the time t of uniform charging e Whether the equalizing charge time limit T is reached e Or time t of uniform floating e-f Whether the time limit T of the uniform rotation and floating is reached e-f . When the time t is uniformly charged e Reach the limit of uniform charging time T e Or time of uniform floating e-f Limit T for reaching uniform floating time e-f And sending a floating charge instruction to the DCDC bidirectional module. Monitoring charging current I in the float charging process C Whether the floating average current I is reached f-e . When charging current I C To achieve said float average current I f-e Then, the float-rotation average timing is started, and t is counted in the float-rotation average timing f-e Reach the float-rotation average time limit T f-e And when the DCDC bidirectional module is in use, sending a uniform charging instruction to the DCDC bidirectional module.
In the embodiment of the invention, the main control module performs the charging action according to the single battery voltage U in the DCDC bidirectional module bn Adjusting the equalizing charge voltage U e And a float voltage U f . Main control module monitors battery monomer voltage U bn Whether the voltage limit of the cell U is reached bmax . When the cell voltage U bn Reach the cell voltage limit U bmax Then, after a first delay time, the equalizing charge voltage U is reduced e And/or float voltage U f . When the cell voltage U bn Fall back to the cell voltage limit U bmax After a second delay time, the equalizing voltage U is increased e And &Or float voltage U f Wherein the second delay time is greater than the first delay time.
In the embodiment of the invention, the main control module executes the charging action according to the charging current I in the process of the DCDC bidirectional module executing the charging action C Bus bar voltage U 0 And the switching supply current I 0 Determining a charging current limit value I L 。
In the embodiment of the invention, the main control module gradually increases the charging current I from the start of charging C . Determining the switching supply current I 0 Constant bus voltage U 0 Reducing the charging current I to a predetermined value C And calculating therefrom a charging current limit value I L 。
In the embodiment of the present invention, the battery management system of the communication base station further includes: the switching power supply comprises a main control sub-circuit, wherein the main control sub-circuit acquires the total output current of the switching power supply through a Hall sensor, when the battery pack discharges, the power supply recovers to supply power, and when a first preset condition is met, the main control sub-circuit sends a constant-voltage current-limiting charging instruction to a corresponding DCDC bidirectional module through a CAN bus. For example, when the total output current of the switching power supply is greater than 5A and the bus voltage is greater than 51V, the main control sub-circuit sends a constant-voltage current-limiting charging command to the corresponding DCDC bidirectional module through the CAN bus. The preset voltage value is 55V, and in practical application, the preset voltage value is set according to practical requirements, and is not limited herein.
In the embodiment of the invention, in the automatic operation mode, when the power supply current I is switched on and off 0 Less than discharge starting current I f-s When the battery management system judges the alternating current power failure, the main control module sends a discharging instruction to the corresponding DCDC bidirectional module through the CAN bus, and the DCDC bidirectional module is converted into a discharging state.
In the embodiment of the present invention, as shown in fig. 2, the DCDC bi-directional module includes: DCDC bidirectional control circuit, wherein, DCDC bidirectional control circuit includes: a first control sub-circuit T1, a second control sub-circuit T2, a battery and a load RL.
The first end of the first control sub-circuit T1 is respectively connected with the anode of the battery and one end of the load RL, the second end of the first control sub-circuit T1 is respectively connected with the cathode of the battery and the first end of the second control sub-circuit T2, and the third end of the first control sub-circuit T1 is respectively connected with the other end of the load RL and the second end of the second control sub-circuit T2.
In an embodiment of the present invention, the first control sub-circuit T1 is used in a boost constant voltage discharge mode and/or a constant current discharge mode, and the first control sub-circuit T1 includes: the circuit comprises a first capacitor C1, a second capacitor C2, an inductor L1, a first MOS tube Q11, a second MOS tube Q12, a third MOS tube Q13 and a fourth MOS tube Q14.
One end of the inductor L1 is connected with a source of the first MOS transistor Q11 and a drain of the second MOS transistor Q12 respectively, and the other end of the inductor L1 is connected with a source of the third MOS transistor Q13 and a drain of the fourth MOS transistor Q14 respectively.
The drain of the first MOS transistor Q11 is connected to the positive electrode of the battery, one end of the first capacitor C1, the drain of the third MOS transistor Q13, one end of the second capacitor C2, and one end of the load RL. The source of the second MOS transistor Q12 is connected to the other end of the first capacitor C1, the negative electrode of the battery, and the first end of the second control sub-circuit T2, and is grounded. The source of the fourth MOS transistor Q14 is connected to the other end of the second capacitor C2, the other end of the load RL, and the second end of the second control sub-circuit T2, and is grounded.
In an embodiment of the present invention, the second control sub-circuit T2 includes: a fifth MOS transistor Q21, a sixth MOS transistor Q22, a diode D1, and a switch control sub-circuit T3.
A first end of the switch control sub-circuit T3 is connected to a cathode of the diode D1, a drain of the fifth MOS transistor Q21, and a cathode of the battery, respectively. The second end of the switch control sub-circuit T3 is connected to the drain of the sixth MOS transistor Q22 and the other end of the load RL. The anode of the diode D1 is connected to the source of the fifth MOS transistor Q21 and the source of the sixth MOS transistor Q22, respectively.
When the second control sub-circuit T2 works, the sixth MOS transistor Q22 is turned on, and when the first control sub-circuit T1 reaches the preset target current limiting value, the fifth MOS transistor Q21 is turned on, the switch control sub-circuit T3 is turned on, and the fifth MOS transistor Q21 and the sixth MOS transistor Q22 are turned off.
In the embodiment of the present invention, the switch control sub-circuit T3 includes: the switch K1 and the coil, wherein the cathode of the diode D1 is connected with the drain of the sixth MOS tube Q22 through the switch.
In the embodiment of the invention, the main control module dynamically adjusts the output current of each battery according to the nuclear capacity data and the actual load of each battery group, and realizes the discharge through the output current. And judging the health degree of each battery according to the nuclear capacity. The core capacity operation is performed periodically, not too frequently, or otherwise affects battery life. The operation of discharging may be a long time from the last core capacity, so if the last core capacity result is directly used, it may be inaccurate, since the battery may be left unused for a long time and self-discharged, and the SOC may vary.
In the embodiment of the invention, the SOC can be corrected by adopting an empirical value. For example, the last core capacity result is SOC1, and each month, SOC1 × 95% is considered, that is, the battery power is considered to have decayed by 5%, and when discharging, the SOC value is obtained according to the last core capacity result and the time from the current time.
In the embodiment of the invention, the SOC can be obtained by an online capacity checking method for standby power of the lead-acid battery pack, the lead-acid battery pack is connected with the busbar through the DCDC bidirectional module and is used for supplying power to a load when a switching power supply at the busbar side is powered off, and the switching power supply connected with the busbar can charge the lead-acid battery pack through the DCDC bidirectional module.
In the embodiment of the present invention, the online capacitance checking method is executed in a state where the switching power supply directly supplies power to the load, as shown in fig. 3, and includes the following steps:
step S1: and charging the lead-acid battery pack for the first time based on the nuclear capacity charging parameters.
In the embodiment of the present invention, the kernel capacity charging parameters include: the charging voltage, the average floating current threshold and the delay time are only given as examples, but not limited to the examples, and corresponding core-capacitor charging parameters are selected according to actual conditions in practical application.
Step S2: and after the first charging is finished, controlling the lead-acid battery pack to carry out first discharging based on the nuclear capacity discharging parameters, and monitoring the voltage data of each battery monomer in the lead-acid battery pack in the first discharging process.
In the embodiment of the present invention, the nuclear capacity discharge parameters include: the termination voltage, the initial discharge voltage, and the target discharge voltage are merely examples, and are not limited to these, and in practical applications, the corresponding nuclear capacity discharge parameters are selected according to practical situations.
And step S3: and determining the fault single battery according to the voltage data in the first discharging process.
And step S4: and calculating the charge state data of the lead-acid battery pack according to the discharge capacity and the rated capacity of the first discharge.
In the embodiment of the invention, the state of charge data is used as the nuclear capacity result of the lead-acid battery pack and is used for calculating the discharge current of the lead-acid battery pack when the lead-acid battery pack is required to supply power to a load.
Step S5: and after the first discharge is finished, carrying out second charge on the lead-acid battery pack according to the nuclear capacity charging parameters.
It should be noted that, the determining of the faulty battery cells in the steps S1 to S5 only marks and records the faulty battery cells, for example, records the numbers of the battery cells, so that the user can clearly know which faulty battery cells exist in the lead-acid battery pack, and the faulty battery cells still participate in charging and discharging, and then the user can directly select to jump over the faulty battery cells without performing subsequent steps, so as to achieve the purpose of prolonging the time period of the battery pack for standby.
In a preferred embodiment, the initial discharge voltage is a busbar-side voltage, the target discharge voltage is a voltage value corresponding to a discharge current-limiting value, and the discharge current-limiting value is smaller than a load current of a busbar-side system.
The operation of determining the faulty battery cell specifically includes: the actual capacity of the lead-acid battery is determined. And determining the single battery as a fault single battery when the voltage data of the single battery is monitored to be lower than the preset single lower limit voltage before the lead-acid battery pack discharges the set proportion of the actual capacity.
In a preferred embodiment, secondary capacity checking and jump-in operations may also be performed after step S5, but before repeated execution, it is necessary to adjust the charging and discharging parameters according to the number of batteries currently remaining in the battery pack. The method specifically comprises the following steps:
s6: and adjusting the nuclear capacity charging parameter and the nuclear capacity discharging parameter according to the number of normal single batteries in the lead-acid battery pack. The number of normal cells in this step is the total number of cells in the battery pack minus the number of faulty cells determined in step S3 above.
S7: and charging the lead-acid battery pack for the third time based on the adjusted nuclear capacity charging parameters.
S8: and after the third charging is finished, controlling the lead-acid battery pack to perform second discharging based on the adjusted nuclear capacity discharging parameters, and monitoring voltage data of each battery monomer in the lead-acid battery pack in the second discharging process.
S9: and determining the fault battery cell according to the voltage data in the second discharging process.
S10: and after the second discharging is finished, charging the lead-acid battery pack for the fourth time according to the adjusted nuclear capacity charging parameters.
S11: and the fault battery cell is jumped through the jumper execution unit.
For convenience of description, the steps S1 to S5 are referred to as a first core capacity, and S6 to S11 are referred to as a second core capacity. According to the embodiment, the charging and discharging parameters used for the first time of checking capacity are preset, and are generally rated values, that is, parameters suitable for the case that the battery pack does not have dead batteries; or a parameter value determined after the last execution of the kernel. However, when the battery pack is currently subjected to the capacity checking, more dead batteries may occur than after the initial or previous capacity checking, so that the parameters used for the first capacity checking are not suitable for the current state of the battery pack, and therefore, the marked dead batteries are not necessarily completely accurate.
In view of this, in this embodiment, the second core capacity is executed immediately after the first core capacity, and the charge and discharge parameters of the second core capacity are obtained by calculation according to the condition that the dead battery is preliminarily determined according to the first core capacity and are matched with the actual state of the battery pack, so that more dead batteries may be further marked, that is, the dead battery marking result of the first core capacity is corrected, and then the jump connection action may be executed, so as to accurately isolate the dead battery cells from the battery pack, and further improve the standby power quantity and the standby power duration of the battery pack.
In an embodiment of the present invention, the first charging, the second charging, the third charging, and the fourth charging include: trickle charging, uniform charging and floating charging are sequentially carried out on the lead-acid battery pack by the charging voltage. And monitoring whether the float current is lower than the uniform float current threshold value or not in the float charging process. And when the float current is lower than the average float current threshold value, judging that the charging stage is finished after the delay time. The floating current threshold and the delay time are not limited, and corresponding numerical values are selected according to specific conditions.
In the embodiment of the invention, the adjusting of the nuclear capacity charging parameter and the nuclear capacity discharging parameter according to the number of the remaining battery monomers in the lead-acid battery pack comprises the following steps: and calculating the charging voltage according to the number of the remaining battery monomers in the lead-acid battery pack and the nominal voltage of the preset monomers. And calculating the termination voltage according to the number of the remaining battery monomers in the lead-acid battery pack and the preset monomer lower limit voltage.
In the embodiment of the invention, when the alternating current is cut off, the current I of the power supply is switched 0 The output current is gradually reduced, when the current is smaller than a first preset current, the sixth MOS tube Q22 is triggered to be conducted, the load on the busbar side is formed into a discharge loop by the battery through the anode bar, the sixth MOS tube Q22, the diode D1, the fifth MOS tube Q21 and the diode D1, and the circuit is fast in response to ensure that the load supplies power stably and does not flash.
In an embodiment of the present invention, the main control module is configured to perform the following operations to control a discharging process of the DCDC bi-directional module: the main control module is i according to the SOC and the load current of each battery pack L And the output current of each battery pack is dynamically regulated to meet the discharge requirement.
In the process of discharging the battery, the main control module dynamically calculates the residual capacity of each battery pack, and the discharging current = i of the first battery pack L *[SOC 1 /(SOC 1 +SOC 2 +...SOC n )]Second battery discharge current = i L *[SOC 2 /(SOC 1 +SOC 2 +...SOC n )]Wherein the first battery core capacity is SOC 1 The second battery pack core capacity is SOC 2 。
In the embodiment of the invention, when the voltage of the battery pack is greater than the preset voltage of the battery pack, the SOC is higher than the preset voltage of the battery pack 1 When the value is larger than a first preset value, a first control sub-circuit T1 of the first battery pack works in a constant-current discharge mode, and a second control sub-circuit T2 of the first battery pack does not work; the first control sub-circuit T1 of the second battery pack module does not work, and the second control sub-circuit T2 of the second battery pack module works; when the SOC is 1 When the voltage is smaller than a first preset value, a first control sub-circuit T1 of the second battery pack works in a constant current discharge mode, and a second control sub-circuit T2 of the second battery pack does not work; the first control sub-circuit T1 of the first battery pack does not work, the second control sub-circuit T2 of the first battery pack works, and the two battery packs work alternately to effectively prolong the service life of the battery packs.
In the embodiment of the present invention, when the voltage of any battery pack is less than or equal to the preset voltage, the second control sub-circuit T2 of the two battery pack modules does not operate, the first control sub-circuit T1 of the first battery pack operates in the voltage boosting constant voltage mode, and the second control sub-circuit T2 of the second battery pack operates in the constant current mode.
In the embodiment of the invention, the battery management system suitable for the communication base station further comprises a switching power supply. The main control sub-circuit collects the total output current of the switching power supply through the Hall sensor. And the battery is subjected to fine management by comprehensively analyzing parameters such as the current of the switching power supply, the state of the DCDC bidirectional module, the voltage and the temperature of the single battery and the like.
In a specific embodiment, in the whole charging process of the battery, when the cell voltage acquired by the acquisition module exceeds the cell voltage limit value, the charging voltage of the battery is subjected to delayed voltage reduction processing according to the current set value, the charging voltage set value is reduced by 1V after about 1 minute of delay (the charging voltage set value can be reduced by 10 times at most, namely 10V), and after the cell overvoltage is eliminated, the charging voltage set value is sequentially increased by 1V after about 10 minutes of delay to gradually recover the original set value. The operation can effectively prevent the damage of the battery caused by the excessive charging current when the charging current limiting value is set to be too large or part of the monomers are seriously attenuated, so as to ensure the safety of the battery. And carrying out refined charging management on the battery in the charging process.
In a specific embodiment, in the charging process, because the DCDC bi-directional module can perform boost charging, when the capacity of the switching power supply is insufficient, the main control module completes charging current-limiting adjustment by detecting the change of the busbar voltage and the current of the switching power supply. For example: in the battery charging process, the charging current limit value is given for a slope, and when the capacity of the switching power supply is enough, the charging current limit finally reaches the set target current limit value; in the charging current climbing stage, when the detected switching power supply current is unchanged and the voltage drop of the busbar is 54.5V, the current value of the charging current is recorded as I1, and the value-8A is the maximum charging current value of the current system. The charging management is carried out in a charging and climbing optimizing mode, and the base station condition caused by insufficient switch capacity can be effectively avoided.
In the embodiment of the invention, due to the existence of the T2 sub-circuit, when the T1 sub-circuit is in fault, the current is discharged through the T2 sub-circuit, and the stability of the standby power of the base station equipment during the AC power failure is effectively ensured by the way.
The battery management system suitable for the communication base station provided by the embodiment of the invention comprises: the system comprises a battery management module, a communication module, a main control module, a DCDC bidirectional module and a data acquisition module. The number of the DCDC bidirectional modules and the number of the data acquisition modules are multiple, and each DCDC bidirectional module is connected with one data acquisition module; the main control module is respectively connected with each data acquisition module and each DCDC bidirectional module, and the DCDC bidirectional modules are connected with the busbar and the lead-acid battery pack. The main control module is respectively connected with each data acquisition module and each DCDC bidirectional module. Through the one-to-one data acquisition of the battery packs, each battery pack is charged and discharged in a proper amount, the damage to each battery is reduced, the service life of the battery is prolonged, and therefore the operation cost of the communication base station is reduced.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.
Claims (18)
1. A battery management system adapted for use in a communication base station, comprising: a battery management module, a communication module, a main control module, a DCDC bidirectional module and a data acquisition module, wherein,
the number of the DCDC bidirectional modules and the number of the data acquisition modules are multiple, and each DCDC bidirectional module is connected with one data acquisition module; the master control module is respectively connected with each data acquisition module and each DCDC bidirectional module, and the DCDC bidirectional module is connected with a busbar and a lead-acid battery pack for standby power of a communication base station;
the main control module is used for determining charging parameters and discharging parameters according to the acquired data, sending a charging instruction to the DCDC bidirectional module according to the charging parameters, and sending a discharging instruction to the DCDC bidirectional module according to the discharging parameters, wherein the charging parameters comprise: charging current limiting value I L Voltage equalizing U e Float voltage U f Limit of uniform charging time T e Uniform floating current I e-f Time limit T of uniform rotation and floating e-f Float and rotate the uniform current I f-e Time limit T for equal floating and rotating f-e (ii) a The discharge parameters include: current I of switch power supply 0 Discharge start current I f-s Core capacity SOC and load current i of battery pack L ；
The DCDC bidirectional module is used for executing the charging instruction so as to charge the connected battery pack by using a switch power supply connected with the busbar and executing the discharging instruction so as to supply power to a communication base station load connected with the busbar by using the connected battery pack; the DCDC bidirectional module comprises a DCDC bidirectional control circuit, the DCDC bidirectional control circuit comprises a first control sub-circuit (T1) and a second control sub-circuit (T2), the first end of the first control sub-circuit (T1) is respectively connected with the anode of the lead-acid battery pack and one end of a busbar load (RL), the second end of the first control sub-circuit (T1) is respectively connected with the cathode of the lead-acid battery pack and the first end of the second control sub-circuit (T2), and the third end of the first control sub-circuit (T1) is respectively connected with the other end of the busbar load (RL) and the second end of the second control sub-circuit (T2); when the voltage of a certain lead-acid battery pack is greater than the preset battery pack voltage and the core capacity SOC is greater than a first preset value, a first control sub-circuit (T1) in a connected DCDC bidirectional module works in a constant current discharge mode, a second control sub-circuit (T2) does not work, first control sub-circuits (T1) of other DCDC bidirectional modules do not work, second control sub-circuits (T2) work, when the core capacity SOC is less than the first preset value, the first control sub-circuit (T1) in the connected DCDC bidirectional module does not work, the second control sub-circuit (T2) works, the first control sub-circuit (T1) of other DCDC bidirectional modules works in the constant current discharge mode, and the second control sub-circuit (T2) does not work, and therefore the plurality of lead-acid battery packs work alternately;
when the voltage of a certain lead-acid battery pack is less than or equal to the voltage of a preset battery pack, a first control sub-circuit (T1) connected with the lead-acid battery pack works in a boosting constant voltage mode, a second control sub-circuit (T2) does not work, and second control sub-circuits (T2) of other lead-acid battery packs work in a constant current mode or do not work;
and the data acquisition module is used for acquiring the voltage data of each battery pack.
2. The battery management system of claim 1, wherein the data acquisition module is configured to acquire the overall voltage U of the battery pack B And cell voltage U bn (ii) a The master control module is used for controlling the overall voltage U B And the cell voltage U bn Determining the charging current limit value I L When the bulk voltage U is higher than the reference voltage B Less than a first preset integral voltage, the cell voltage U bn When the voltage is less than the preset single voltage, the charging current limiting value I L For a predetermined mean charge current-limiting value I e * A predetermined coefficient when the overall voltage U is B When the voltage is greater than a second preset integral voltage, the charging current limiting value I L For a predetermined mean charge current-limiting value I e 。
3. The battery management system of claim 2, wherein the main control module is configured to perform the following operations to control the charging process of the DCDC bi-directional module:
sending a uniform charging instruction to the DCDC bidirectional module to enable the DCDC bidirectional module to be in a constant-voltage current-limiting state, and starting uniform charging timing;
monitoring the bulk voltage U B Whether the uniform charging voltage U is reached e And a charging current I C Whether or not less than uniform floating current I e-f ；
When the overall voltage U is B To the uniform charging voltage U e And a charging current I C Less than uniform floating current I e-f When the time is up, the time of the uniform floating time is started;
judging the time t of uniform charging e Whether the equalizing charge time limit T is reached e Or time t of uniform floating e-f Whether the time limit T of uniform rotation and floating is reached e-f ；
When the time t is uniformly charged e Reach the equalized charging time limit T e Or time t of uniform floating e-f Limit T for reaching uniform floating time e-f When the DCDC bidirectional module is started, a floating charge instruction is sent to the DCDC bidirectional module;
monitoring charging current I in floating charging process C Whether the floating average current I is reached f-e ；
When charging current I C To achieve said float average current I f-e Then, the float-rotation average timing is started, and t is counted in the float-rotation average timing f-e Reach said float mean time limit T f-e And sending a uniform charging instruction to the DCDC bidirectional module.
4. The battery management system of claim 2, wherein the main control module is configured to control the DCDC bi-directional module to perform a charging operation according to the cell voltage U bn Adjusting the equalizing charge voltage U e And a floating voltage U f ；
The master control module monitoringThe cell voltage U bn Whether the voltage limit of the cell U is reached bmax ；
When the cell voltage U bn Reach the cell voltage limit U bmax Then, after a first delay time, the equalizing charge voltage U is reduced e And/or float voltage U f ；
When the voltage U of the battery cell bn Fall back to the cell voltage limit U bmax After a second delay time, the equalizing voltage U is increased e And/or float voltage U f Wherein the second delay time is greater than the first delay time.
5. The battery management system of claim 3, wherein the main control module is configured to perform the charging operation according to the charging current I during the charging operation of the DCDC bi-directional module C Bus bar voltage U 0 And the switching supply current I 0 Determining the charging current limit value I L 。
6. The battery management system of claim 5, wherein the main control module gradually increases the charging current I from the start of charging C (ii) a Determining the switching supply current I 0 Constant bus voltage U 0 Reducing the charging current I to a predetermined value C And calculating therefrom a charging current limit value I L 。
7. The battery management system of claim 1, further comprising: the switching power supply comprises a main control sub-circuit, wherein the main control sub-circuit acquires the total output current of the switching power supply through a Hall sensor, when the battery pack discharges, the power supply recovers to supply power, and when a first preset condition is met, the main control sub-circuit sends a constant-voltage current-limiting charging instruction to a corresponding DCDC bidirectional module through a CAN bus.
8. The battery management system for a communication base station of claim 1,in the automatic running mode, when the power supply current I is switched on or off 0 Less than the discharge start current I f-s When the battery management system judges the alternating current power failure, the main control module sends a discharging instruction to the corresponding DCDC bidirectional module through the CAN bus, and the DCDC bidirectional module is converted to a discharging state.
9. The battery management system for a communication base station according to claim 1, wherein the first control sub-circuit (T1) is used for a boost constant voltage discharge mode and/or a constant current discharge mode, and the first control sub-circuit (T1) comprises: a first capacitor (C1), a second capacitor (C2), an inductor (L1), a first MOS transistor (Q11), a second MOS transistor (Q12), a third MOS transistor (Q13) and a fourth MOS transistor (Q14), wherein,
one end of the inductor (L1) is connected with a source of the first MOS transistor (Q11) and a drain of the second MOS transistor (Q12) respectively, and the other end of the inductor (L1) is connected with a source of the third MOS transistor (Q13) and a drain of the fourth MOS transistor (Q14) respectively;
the drain of the first MOS tube (Q11) is respectively connected with the anode of the battery, one end of the first capacitor (C1), the drain of the third MOS tube (Q13), one end of the second capacitor (C2) and one end of the load (RL);
the source of the second MOS tube (Q12) is respectively connected with the other end of the first capacitor (C1), the cathode of the battery and the first end of the second control sub-circuit (T2) and is grounded;
and the source of the fourth MOS tube (Q14) is respectively connected with the other end of the second capacitor (C2), the other end of the load (RL) and the second end of the second control sub-circuit (T2) and is grounded.
10. Battery management system suitable for a communication base station according to claim 9, characterized in that the second control sub-circuit (T2) comprises: a fifth MOS tube (Q21), a sixth MOS tube (Q22), a diode (D1) and a switch control sub-circuit (T3),
the first end of the switch control sub-circuit (T3) is respectively connected with the cathode of the diode (D1), the drain of the fifth MOS tube (Q21) and the cathode of the battery;
the second end of the switch control sub-circuit (T3) is respectively connected with the drain of the sixth MOS tube (Q22) and the other end of the load (RL);
the anode of the diode (D1) is respectively connected with the source of the fifth MOS tube (Q21) and the source of the sixth MOS tube (Q22);
when the second control sub-circuit (T2) works, the sixth MOS tube (Q22) is conducted, when the first control sub-circuit (T1) reaches a preset target current limiting value, the fifth MOS tube (Q21) is conducted, the switch control sub-circuit (T3) is conducted, and the fifth MOS tube (Q21) and the sixth MOS tube (Q22) are closed.
11. Battery management system suitable for a communication base station according to claim 10, characterized in that the switch control sub-circuit (T3) comprises: a switch (K1), a coil, wherein,
the cathode of the diode (D1) is connected with the drain of the sixth MOS tube (Q22) through a switch.
12. Battery management system suitable for a communication base station according to claim 11, characterized in that when the first control sub-circuit (T1) fails, the current is discharged through the second control sub-circuit (T2).
13. The battery management system of claim 12, wherein the main control module dynamically adjusts the output current of each battery according to the capacity check data and the actual load of each battery set, and the discharging is implemented through the output current.
14. The battery management system of claim 13, wherein the health of each battery is determined according to the capacity check result.
15. The battery management system of claim 14, wherein the switching power supply current I is switched on and off after ac power failure 0 Output ofThe current reduces gradually, and when the current was less than first default current, trigger sixth MOS pipe (Q22) and switch on, female side load of arranging forms the return circuit that discharges by battery through anodal row, sixth MOS pipe (Q22), diode (D1) and fifth MOS pipe (Q21) and diode (D1), guarantees that the load power supply does not flash.
16. The battery management system of claim 15, wherein the main control module is configured to perform the following operations to control the discharging process of the DCDC bi-directional module: the main control module is i according to the SOC and the load current of each battery pack L And dynamically adjusting the output current of each battery pack to meet the discharge requirement, wherein in the discharge process of the battery, the main control module dynamically calculates the residual capacity of each battery pack, and the discharge current of the ith battery pack is i L *[SOC i /(SOC 1 +SOC 2 +...SOC n )]In which SOC is 1 ..SOC n For the result of the capacity of each battery, SOC i Refers to the capacity check result of the ith battery pack.
17. The battery management system of claim 16, wherein the SOC is adapted to determine when the battery voltage is greater than a predetermined battery voltage 1 When the value is larger than a first preset value, a first control sub-circuit (T1) of the first battery pack works in a constant current discharge mode, and a second control sub-circuit (T2) of the first battery pack does not work; the first control sub-circuit (T1) of the second battery pack module does not work, and the second control sub-circuit (T2) of the second battery pack module works; when SOC is reached 1 When the voltage is smaller than a first preset value, a first control sub-circuit (T1) of the second battery pack works in a constant current discharge mode, and a second control sub-circuit (T2) of the second battery pack does not work; the first control sub-circuit (T1) of the first battery pack does not work, the second control sub-circuit (T2) of the first battery pack works, and the two battery packs work alternately.
18. The battery management system of claim 17, wherein when the voltage of any battery pack is less than or equal to the predetermined voltage, the second control sub-circuit (T2) of both battery pack modules is not operated, the first control sub-circuit (T1) of the first battery pack operates in the boost constant voltage mode, and the second control sub-circuit (T2) of the second battery pack operates in the constant current mode.
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| CN107219470B (en) * | 2017-07-24 | 2020-05-01 | 深圳市泰昂能源科技股份有限公司 | On-line checking discharge device and method for storage battery pack |
| CN208142855U (en) * | 2018-03-09 | 2018-11-23 | 河南森源重工有限公司 | A kind of battery management system and battery pack |
| CN111049245B (en) * | 2019-11-25 | 2022-01-07 | 国网浙江省电力有限公司湖州供电公司 | High-reliability direct-current power supply for transformer substation and detection method |
| CN212572387U (en) * | 2020-08-31 | 2021-02-19 | 北京宏光星宇科技发展有限公司 | Bidirectional DCDC converter device for hybrid application of battery pack |
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Denomination of invention: A battery management system suitable for communication base stations Granted publication date: 20230418 Pledgee: Zhongguancun Branch of Bank of Beijing Co.,Ltd. Pledgor: BEIJING HONGGUANG XINGYU TECHNOLOGY DEVELOPMENT Co.,Ltd. Registration number: Y2024110000044 |
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