CN113258654B - Echelon battery system and control method thereof - Google Patents
Echelon battery system and control method thereof Download PDFInfo
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- CN113258654B CN113258654B CN202110713778.7A CN202110713778A CN113258654B CN 113258654 B CN113258654 B CN 113258654B CN 202110713778 A CN202110713778 A CN 202110713778A CN 113258654 B CN113258654 B CN 113258654B
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 61
- 238000012544 monitoring process Methods 0.000 claims abstract description 40
- 238000007599 discharging Methods 0.000 claims abstract description 39
- 238000004891 communication Methods 0.000 claims abstract description 26
- 230000036541 health Effects 0.000 claims description 21
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 17
- 229910052744 lithium Inorganic materials 0.000 claims description 17
- 239000002253 acid Substances 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 6
- 238000010276 construction Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The invention discloses a gradient battery device, a gradient battery system and a gradient battery system control method, wherein the gradient battery device comprises a bus and a first power supply module, the first power supply module comprises a monitoring module and a plurality of bidirectional DC-DC modules, one end of each bidirectional DC-DC module is electrically connected with the bus, the other end of each bidirectional DC-DC module is electrically connected with a corresponding first battery module, and the bidirectional DC-DC module is used for acquiring battery parameter information of the corresponding first battery module and actively charging/discharging the first battery module; the monitoring module is in communication connection with all the bidirectional DC-DC modules so as to acquire battery parameter information of all the first battery modules and adjust charging/discharging parameters of all the bidirectional DC-DC modules according to the battery parameter information of all the first battery modules; the invention can adjust the charge/discharge parameters of each battery module so as to utilize the battery modules with different voltage levels, avoid the mutual charge among the battery modules caused by different voltage levels of the battery modules, and effectively avoid the electric energy loss.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a echelon battery system and a echelon battery system control method.
Background
Along with the continuous increase of the load in the stock machine room station of the large-capacity lead-acid battery, the machine room power supply power is insufficient, the system cannot stably run, and if the reconstruction cost is too high. If a simple battery switching manager is used, the cascade batteries are mutually charged through thyristors or contactors to waste energy, and the cascade batteries are uneven, so that the cascade batteries with different voltage levels cannot be utilized. According to the multi-stage battery system, the capacity of a machine room of the multi-stage battery system can be expanded by the multi-stage battery system, so that the transformation cost is reduced, multi-stage batteries with different voltage grades can be fully utilized, the mutual charging among the batteries is avoided, the battery can be controlled to charge at the peak discharge valley value of the power grid, and the effect of saving the electric charge is achieved. In the base station application, the system can operate with the direct current power supply equipment of the old base station without communication, and the construction difficulty of modifying the old base station is simplified.
Disclosure of Invention
The invention aims to provide a gradient battery system and a gradient battery system control method, which can independently adjust the charging/discharging parameters of each battery module so as to fully utilize the battery modules with different voltage grades, avoid the mutual charging among the battery modules caused by different voltage grades of the battery modules and effectively avoid the electric energy loss.
In order to achieve the above object, the present invention discloses a gradient battery device, which comprises a bus and a first power supply module, wherein the first power supply module comprises a monitoring module and a plurality of bidirectional DC-DC modules, one end of each bidirectional DC-DC module is electrically connected with the bus, the other end is electrically connected with a corresponding first battery module, all bidirectional DC-DC modules are arranged in parallel through the bus, and the bidirectional DC-DC modules are used for collecting battery parameter information of the corresponding first battery module and actively charging/discharging the first battery module; the monitoring module is in communication connection with all the bidirectional DC-DC modules so as to acquire battery parameter information of all the first battery modules, and adjusts charging/discharging parameters of all the bidirectional DC-DC modules according to the battery parameter information of all the first battery modules.
Preferably, the first battery module is a lithium battery pack, the lithium battery pack comprises a lithium battery unit and a BMS unit in communication connection with the lithium battery unit, and the BMS unit can collect battery parameter information of the lithium battery unit.
Correspondingly, the invention also discloses a gradient battery system, which comprises a gradient battery device and a second power supply module, wherein the gradient battery device is as described above, the second power supply module comprises a switch module and an acquisition module, one end of the switch module is electrically connected with the bus bar, the other end of the switch module is electrically connected with the second battery module, the switch module can selectively electrically connect the second battery module with the bus bar and charge/discharge the second battery module, and the acquisition module is used for acquiring battery parameter information of the second battery module.
Preferably, the echelon battery system further comprises a master control module, the master control module is in communication connection with the monitoring module, the switch module and the acquisition module, the DC-DC module is further used for monitoring real-time voltage values of the buses, the master control module can receive battery parameter information of all the first battery modules, battery parameter information of the second battery modules and real-time voltage values of the buses, and assist in adjusting charging/discharging parameters of each bidirectional DC-DC module, on-off of the switch module and charging/discharging actions of the switch module on the second battery modules so as to stabilize current of the buses at preset current thresholds.
Preferably, the switching module may adjust a charge/discharge current of the second battery module.
Preferably, the echelon battery system further comprises an AC-DC module and a communication equipment load module, wherein the AC-DC module and the communication equipment load module are respectively and electrically connected with the bus, and the AC-DC module is used for electrically connecting external electric equipment with the bus.
Preferably, the second battery module is a lead acid battery pack.
Correspondingly, the invention also discloses a echelon battery system control method which is applied to the echelon battery system, and comprises the following steps:
S1, each bidirectional DC-DC module collects battery parameter information of a corresponding first battery module and a real-time voltage value of a collecting bus, and the collecting module collects battery parameter information of a second battery module;
s2, the monitoring module adjusts the charging/discharging parameters of all the bidirectional DC-DC modules according to the battery parameter information of all the first battery modules;
And S3, the master control module acquires battery parameter information of all the first battery modules, battery parameter information of the second battery modules and real-time voltage values of buses, and assists in adjusting charging/discharging parameters of each bidirectional DC-DC module, on-off of the switch module and charging/discharging actions of the switch module on the second battery modules so as to stabilize the current of the buses at a preset current threshold.
Preferably, the battery parameter information includes a battery health degree, and the step S2 specifically includes:
S21, the monitoring module ranks all the first battery modules according to the sizes of the battery health degrees to obtain a battery health degree ranking table;
And S22, the monitoring module adjusts the charge/discharge current of all the bidirectional DC-DC modules to the corresponding first battery modules according to the battery health degree ranking table so as to enable all the first battery modules to be charged/discharged in a differentiated mode.
Preferably, the bidirectional DC-DC module has a charge/discharge coefficient, and the monitoring module adjusts the charge/discharge current of the bidirectional DC-DC module by adjusting the charge/discharge coefficient of the bidirectional DC-DC module.
Compared with the prior art, the invention can independently adjust the charging/discharging parameters of each battery module so as to fully utilize the battery modules with different voltage levels, avoid the mutual charging among the battery modules caused by the different voltage levels of the battery modules, and effectively avoid the electric energy loss.
Drawings
Fig. 1 is a schematic view of the construction of a gradient battery system of the present invention;
FIG. 2 is a schematic diagram of the control loop of the gradient battery system of the present invention;
FIG. 3 is a schematic view of yet another construction of the gradient battery system of the present invention;
Fig. 4 is a flow chart of the control method of the gradient battery system of the present invention.
Detailed Description
In order to describe the technical content, the constructional features, the achieved objects and effects of the present invention in detail, the following description is made in connection with the embodiments and the accompanying drawings.
Referring to fig. 1 and 3, the battery system of the present embodiment includes a battery device 10 and a second power supply module 20, where the second power supply module 20 is specifically a base station. The echelon battery device 10 comprises a bus 11 and a first power supply module 12, the first power supply module 12 comprises a monitoring module 122 and a plurality of bidirectional DC-DC modules 121, one end of each bidirectional DC-DC module 121 is electrically connected with the bus 11, the other end of each bidirectional DC-DC module 121 is electrically connected with the corresponding first battery module 1, all the bidirectional DC-DC modules 121 are arranged in parallel through the bus 11, and the bidirectional DC-DC modules 121 are used for collecting battery parameter information of the corresponding first battery module 1 and actively charging/discharging the first battery module 1.
The first Battery module 1 is a lithium Battery pack 101, where the lithium Battery pack 101 includes a lithium Battery unit and a BMS (Battery MANAGEMENT SYSTEM: battery management system) unit communicatively connected to the lithium Battery unit, and the BMS unit 102 may collect Battery parameter information of the lithium Battery unit. Since battery parameters such as battery health, percentage of battery remaining, etc. tend to be inconsistent from one lithium battery pack 101 to another, a voltage gradient exists between lithium battery packs 101. The bidirectional DC-DC module 121 of the present embodiment is configured to collect battery parameter information of the corresponding first battery module 1, and actively charge/discharge the first battery module 1, which can independently adjust the charge/discharge parameters according to the battery parameter information of each first battery module 1.
It can be understood that the bidirectional DC-DC module 121 of the present embodiment is an intelligent DC-DC module with charging and discharging functions, and has a control chip therein, so that the dynamic adjustment of the charging/discharging parameters can be performed according to the real-time battery parameter information of the first battery module 1, and the mutual charging between different first battery modules 1 is avoided. The bi-directional DC-DC module 121 is provided with a first communication port 1211, and the bi-directional DC-DC module 121 is communicatively connected to the BMS unit 102 of the corresponding first battery module 1 through the first communication port 1211 to read the battery parameter information of the first battery module 1.
The monitoring module 122 is communicatively connected to all the bidirectional DC-DC modules 121 to obtain the battery parameter information of all the first battery modules 1, and adjusts the charging/discharging parameters of all the bidirectional DC-DC modules 121 according to the battery parameter information of all the first battery modules 1. Specifically, the bidirectional DC-DC module 121 is further provided with a second communication port 1212, the monitoring module 122 is provided with a third communication port 1221, the bidirectional DC-DC module 121 is in communication connection with the monitoring module 122 through the second communication port 1212 and the third communication port 1221 to send the battery parameter information of the first battery module 1 to the monitoring module 122, and the monitoring module 122 adjusts the charging/discharging parameters of all the bidirectional DC-DC modules 121 according to the received battery parameter information of all the first battery modules 1 to adjust the operation mode of the gradient battery device 10.
Referring to fig. 1, the second power supply module 20 of the present embodiment includes a switch module 21 and an acquisition module 22, one end of the switch module 21 is electrically connected to the bus 11, the other end is electrically connected to the second battery module 2, the second battery module 2 of the present embodiment is a lead-acid battery pack, and may be a large number of lead-acid battery packs in a stock machine room in a base station, so that the total battery capacity of the echelon battery system is increased by sharing a large number of lead-acid battery packs in the stock machine room, and the high-capacity lead-acid battery of the stock machine room station can be realized without modification. The switch module 21 selectively connects the second battery module 2 to the bus bar 11 and charges/discharges the second battery module 2, and preferably, the switch module 21 of the present embodiment can adjust the charge/discharge current of the second battery module 2. The acquisition module 22 is used for acquiring battery parameter information of the second battery module 2.
Preferably, the echelon battery system further comprises a master control module 23, the monitoring module 122 further comprises a fourth communication port 1222, the DC-DC module 121 is further used for monitoring the real-time voltage value of the bus 11, the master control module 23 comprises a fifth communication port 231, the master control module 23 is communicatively connected with the monitoring module 122 through the fourth communication port 1222 and the fifth communication port 231, and the master control module 23 can receive all the battery parameter information of the first battery module 1, the battery parameter information of the second battery module 2 and the real-time voltage value of the bus 11, and assist in adjusting the charging/discharging parameters of each bidirectional DC-DC module 121, the on-off of the switch module 21 and the charging/discharging action of the switch module 21 on the second battery module 2 so as to stabilize the current of the bus 11 at a preset current threshold. At this time, the master control module 23 may further integrate the battery parameter information of the second battery module 2 and the real-time voltage value of the bus 11 on the basis of the monitoring module 122, so as to further integrate the charging/discharging parameters of all the first battery module 1 and the second battery module 2 to ensure that the current of the bus 11 is constant.
The operation modes of the gradient battery device 10 of the present embodiment include a common charge and common discharge mode, a priority charge and discharge mode, a peak clipping and valley filling mode, and a battery core capacity mode:
In the co-charge and co-discharge mode, the monitoring module 122 sets the charge/discharge parameters of each bidirectional DC-DC module 121 to be uniform so that all the first battery modules 1 have the same charge/discharge current;
In the priority charge-discharge mode, the monitoring module 122 firstly ranks all the first battery modules 1 according to the sizes of the battery health degrees to obtain a battery health degree ranking table; the monitoring module 122 adjusts the charge/discharge current of all the bidirectional DC-DC modules 121 to the corresponding first battery modules 1 according to the battery health degree ranking table, so that all the first battery modules 1 are charged/discharged in a differentiated manner, for example, the charge/discharge current of the first battery module 1 with higher battery health degree is higher, so that the charge/discharge current of all the first battery modules 1 is set in a gradient manner. This mode enables adjustment of the charge/discharge parameters of the bidirectional DC-DC module 121 according to the degree of aging of each first battery module 1, the lower the degree of aging, the higher the first battery module 1 is charged/discharged;
In the automatic charge-discharge mode, the monitoring module 122 adjusts the charge/discharge power of the corresponding bidirectional DC-DC module 121 according to the battery health of the first battery module 1, specifically, the charge/discharge power of the bidirectional DC-DC module 121 is the product of the total output power of the bidirectional DC-DC module 121, the percentage of the battery residual capacity of the corresponding first battery module 1, the battery health of the corresponding first battery module 1, and the discharge capacity coefficient K of the corresponding first battery module 1, and the synchronous discharge capacity of all the first battery modules 1 is achieved by calculating the discharge capacity coefficients of all the first battery modules 1;
In the peak clipping and valley filling mode, the peak value and valley value time periods of the electricity price are preset on the monitoring module 122, the monitoring module 122 controls all the first battery modules 1 to discharge in the peak value time period of the electricity price, and charge is carried out in the valley value time period, and the flat value time period can be set as charging or non-discharging; when the base station fails, the monitoring module 122 automatically stops the peak clipping and valley filling mode, and when the commercial power is recovered, the monitoring module 122 controls all the first battery modules 1 to recover the peak clipping and valley filling mode after being fully charged. Specifically, the echelon battery device 10 monitors the real-time voltage value of the bus 11 in real time, when the commercial power is at a peak value, the master control module 23 automatically adjusts the real-time voltage value of the bus 11 to the uniform charging voltage of the second battery module 2 according to the real-time voltage value of the bus 11, and the second battery module 2 is not charged under the premise of ensuring the load by collecting the current of the second battery module 2; when the utility power is in the valley value, the master control module 23 automatically matches the power according to the real-time voltage value of the bus 11 to adjust the real-time voltage value of the bus 11 to the floating voltage of the second battery module 2, so as to ensure that the load and the second battery module 2 charge each first battery module 1 on the premise of not charging, thereby preventing the energy waste caused by the mutual charging and discharging with the second battery module 2 and preventing the overcharging of the second battery module 2;
In the battery capacity checking mode, the monitoring module 122 regularly performs discharging capacity checking processing on all the first battery modules 1, and evaluates and calculates the battery health degree according to the battery types and the capacity of all the first battery modules 1 and the voltage and current data in the historical discharging records; the discharging current proportion of each first battery module 1 in the common discharging mode is regularly adjusted by all the first battery modules 1 according to the actual capacity of the single battery of each first battery module 1, so that the battery health degree of all the first battery modules 1 gradually tends to be consistent.
Fig. 2 is a schematic diagram showing a control loop of the gradient battery system of the present embodiment, in which the first-stage control loop prevents the second battery module 2 of the old base station from being overcharged by controlling the magnitude of the current of the second battery module 2, and prevents the second battery module 2 and the first battery module 1 from being charged and discharged to each other; the second-stage control loop realizes peak-staggering power consumption by controlling the voltage level of the bus 11, so that the voltage stability of the bus 11 during charging/discharging of the first battery module 1 can be met without affecting the power-down of the original base station; the charge/discharge power of each first battery module 1 is adjusted by adjusting the magnitude of the charge/discharge coefficient K of each bidirectional DC-DC module 121 to satisfy different charge/discharge power settings of different first battery modules 1. The voltage average value of the bus 11 is calculated by the outer ring and the current equalizing ring for 10 times to calculate the voltage ring once.
Preferably, the gradient battery system further comprises an AC-DC module 24 and a communication device load module 25, where the communication device load module 25 is in particular the total load of all consumers in the base station. The AC-DC module 24 and the communication device load module 25 are electrically connected to the bus 11, respectively, and the AC-DC module 24 is used for electrically connecting the bus 11 to external electric equipment.
It should be noted that fig. 1 shows that the second power supply module 20 of the present embodiment is connected to the second battery module 2, and is suitable for a stock machine room station with a large-capacity lead-acid battery, and the system total battery capacity is increased by sharing the batteries of the first battery module 1 and the second battery module 2, so that the high-capacity lead-acid battery of the stock machine room station can be implemented without modification.
In other preferred manners, the switch module 21, the second battery module 2 and the collecting module 22 may not be connected to the bus 11 as shown in fig. 3, and at this time, the ladder battery system of the embodiment is suitable for a new station and an outdoor cabinet base station, and the different first battery modules 1 are connected to the bus 11 through the bidirectional DC-DC module 121, so as to realize the mixed use of the different voltage ladder first battery modules 1.
Referring to fig. 4, correspondingly, the invention also discloses a echelon battery system control method, which is applied to the echelon battery system, and comprises the following steps:
S1, each bidirectional DC-DC module 121 collects battery parameter information of a corresponding first battery module 1 and collects real-time voltage values of a collection bus, and the collection module 22 collects battery parameter information of a second battery module 2;
S2, the monitoring module 122 adjusts the charging/discharging parameters of all the bidirectional DC-DC modules 121 according to the battery parameter information of all the first battery modules 1;
and S3, the master control module 23 acquires the battery parameter information of all the first battery modules 1, the battery parameter information of the second battery modules 2 and the real-time voltage value of the bus, and assists in adjusting the charging/discharging parameters of each bidirectional DC-DC module 121, the on-off of the switch module 21 and the charging/discharging actions of the switch module 21 on the second battery modules 2 so as to stabilize the current of the bus 11 at a preset current threshold.
Preferably, the battery parameter information includes a battery health degree, and step S2 specifically includes:
s21, the monitoring module 122 ranks all the first battery modules 1 according to the sizes of the battery health degrees to obtain a battery health degree ranking table;
The monitoring module 122 adjusts the charge/discharge current of all the bidirectional DC-DC modules 121 to the corresponding first battery modules 1 according to the battery health degree ranking table, so that all the first battery modules 1 are charged/discharged differently.
Preferably, the bidirectional DC-DC module 121 has a charging/discharging coefficient K, and the monitoring module adjusts the charging/discharging current of the bidirectional DC-DC module 121 by adjusting the charging/discharging coefficient K of the bidirectional DC-DC module 121.
With reference to fig. 1-4, the present invention can independently adjust the charge/discharge parameters of each battery module to fully utilize the battery modules with different voltage levels, thereby avoiding the mutual charge between the battery modules caused by the different voltage levels of the battery modules and effectively avoiding the electric energy loss.
The foregoing description of the preferred embodiments of the present invention is not intended to limit the scope of the claims, which follow, as defined in the claims.
Claims (7)
1. The utility model provides a echelon battery system, its characterized in that includes echelon battery device, second power module and total accuse module, echelon battery device includes generating line and first power module, first power module includes:
The system comprises a bus, a plurality of bidirectional DC-DC modules, a plurality of battery modules and a battery module, wherein one end of each bidirectional DC-DC module is electrically connected with the bus, the other end of each bidirectional DC-DC module is electrically connected with a corresponding first battery module, all bidirectional DC-DC modules are arranged in parallel through the bus, the bidirectional DC-DC modules are used for collecting battery parameter information of the corresponding first battery modules and actively charging/discharging the first battery modules, the first battery modules are lithium battery packs, each lithium battery pack comprises a lithium battery unit and a BMS unit in communication connection with the lithium battery unit, and the BMS unit can collect battery parameter information of the lithium battery unit;
the monitoring module is in communication connection with all the bidirectional DC-DC modules so as to acquire battery parameter information of all the first battery modules and adjust charging/discharging parameters of all the bidirectional DC-DC modules according to the battery parameter information of all the first battery modules;
The second power supply module comprises a switch module and an acquisition module, one end of the switch module is electrically connected with the bus, the other end of the switch module is used for being electrically connected with a second battery module, the switch module can selectively electrically connect the second battery module with the bus and charge/discharge the second battery module, and the acquisition module is used for acquiring battery parameter information of the second battery module;
The main control module is in communication connection with the monitoring module, the switch module and the acquisition module, and is also used for monitoring the real-time voltage value of the bus, and the main control module can receive the battery parameter information of all the first battery modules, the battery parameter information of the second battery modules and the real-time voltage value of the bus, and assist in adjusting the charging/discharging parameters of each bidirectional DC-DC module, the on-off of the switch module and the charging/discharging action of the switch module on the second battery modules so as to stabilize the current of the bus at a preset current threshold.
2. The gradient battery system of claim 1, wherein the switch module regulates a charge/discharge current of the second battery module.
3. The gradient battery system of claim 1, further comprising an AC-DC module and a communication device load module, the AC-DC module and the communication device load module being electrically connected to the bus bar, respectively, the AC-DC module being configured to electrically connect an external powered device to the bus bar.
4. The gradient battery system of claim 1, wherein the second battery module is a lead acid battery pack.
5. A gradient battery system control method applied to the gradient battery system according to any one of claims 1 to 4, characterized in that the gradient battery system control method comprises the steps of:
Each bidirectional DC-DC module collects battery parameter information of a corresponding first battery module and a real-time voltage value of a collecting bus, and the collecting module collects battery parameter information of a second battery module;
the monitoring module adjusts the charging/discharging parameters of all the bidirectional DC-DC modules according to the battery parameter information of all the first battery modules;
The master control module acquires battery parameter information of all the first battery modules, battery parameter information of the second battery modules and real-time voltage values of buses, and assists in adjusting charging/discharging parameters of each bidirectional DC-DC module, on-off of the switch module and charging/discharging actions of the switch module on the second battery modules so as to stabilize current of the buses at a preset current threshold.
6. The gradient battery system control method according to claim 5, wherein the battery parameter information includes a battery health, and the monitoring module adjusts charge/discharge parameters of all bidirectional DC-DC modules according to the battery parameter information of all first battery modules, specifically comprising:
the monitoring module ranks all the first battery modules according to the sizes of the battery health degrees to obtain a battery health degree ranking table;
The monitoring module adjusts the charge/discharge current of all the bidirectional DC-DC modules to the corresponding first battery modules according to the battery health degree ranking table so as to enable all the first battery modules to be charged/discharged in a differentiated mode.
7. The gradient battery system control method of claim 5, wherein the bi-directional DC-DC module has a charge/discharge coefficient, and the monitor module adjusts the charge/discharge current of the bi-directional DC-DC module by adjusting the charge/discharge coefficient of the bi-directional DC-DC module.
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| CN115579988A (en) * | 2022-10-27 | 2023-01-06 | 重庆瑞盾科技发展有限公司 | Base station battery intelligent management system and method |
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| US7498693B2 (en) * | 2004-02-18 | 2009-03-03 | Diversified Technologies, Inc. | More compact and higher reliability power source system |
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| CN109120051A (en) * | 2018-10-10 | 2019-01-01 | 北京凯华网联新能源技术有限公司 | A kind of intelligent multichannel mixed battery manager, the control method of lithium battery power supply unit, base station |
| CN109301920A (en) * | 2018-10-10 | 2019-02-01 | 北京凯华网联新能源技术有限公司 | Intelligent multichannel based on daisy chain bus uses battery manager, control method and its application with |
| 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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