CN114268152A - Passive protection and active protection system and method for lithium battery energy storage - Google Patents
Passive protection and active protection system and method for lithium battery energy storage Download PDFInfo
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- CN114268152A CN114268152A CN202111611706.8A CN202111611706A CN114268152A CN 114268152 A CN114268152 A CN 114268152A CN 202111611706 A CN202111611706 A CN 202111611706A CN 114268152 A CN114268152 A CN 114268152A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 141
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 139
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 139
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims abstract description 47
- 238000007599 discharging Methods 0.000 claims abstract description 37
- 238000001514 detection method Methods 0.000 claims description 31
- 239000013078 crystal Substances 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 6
- 238000005562 fading Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 5
- 230000005540 biological transmission Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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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
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Abstract
The invention discloses a passive protection and active protection system and a method for storing energy of a lithium battery, which comprises a lithium battery energy storage module for storing the electric quantity of the lithium battery, a charging module for charging the lithium battery energy storage module, a discharging module for discharging the lithium battery energy storage module, a power conversion module for distributing the power of the lithium battery energy storage module to the discharging module and a temperature control module for controlling the temperature control module of the lithium battery energy storage module, wherein the test scheme is formulated according to the charging state and the discharging state of the lithium battery energy storage, the real-time data of the lithium battery energy storage during the charging and the discharging process is obtained, the residual electric quantity of the lithium battery energy storage is obtained, different power conversion circuits are configured to distribute the lithium battery energy storage power according to the open-circuit voltage and the residual electric quantity, the passive protection and the active protection functions during the lithium battery energy storage operation are realized, and the long-time use of the lithium battery energy storage is ensured, the development and popularization of lithium battery energy storage are facilitated.
Description
Technical Field
The invention relates to the technical field of energy storage, in particular to a passive protection and active protection system and method for lithium battery energy storage.
Background
Overcharge and instantaneous overcurrent discharge of the lithium battery energy storage in the use process are important influence factors influencing the safety of the lithium battery energy storage, if the working temperature is too high in the operation process and explosion danger exists, the energy storage protection method needs to be researched by combining the characteristics of a battery in the lithium battery energy storage and through key variables such as open-circuit voltage and charge state.
The operation process of the lithium battery energy storage is a complex transient process, different characteristics are realized when different charging and discharging currents occur, the dynamic performance under different operation states needs to be combined, the protection method of the lithium battery energy storage is researched, the safety of the lithium battery energy storage is greatly improved, the improvement significance on the reliability of a lithium battery transmission system is great, and therefore the protection of the lithium battery energy storage is the existing technical problem.
Disclosure of Invention
The invention provides a passive protection and active protection system and a method for lithium battery energy storage, and aims to stably discharge by a discharge module through configuring different power conversion circuits through the power conversion module by combining dynamic performances under different operation states when different charging and discharging currents are adopted.
In order to achieve the technical purpose and achieve the technical effect, the invention is realized by the following technical scheme:
passive protection and active protection system of lithium electricity energy storage includes:
the lithium battery energy storage module is used for storing the electric quantity of the lithium battery;
the charging module is provided with an energy storage controller, and the input end of the charging module is connected to a power grid and is electrically connected with the lithium battery energy storage module to charge the lithium battery energy storage module;
the discharging module is electrically connected with the lithium battery energy storage module and is used for discharging the lithium battery energy storage module;
the power conversion module is provided with a plurality of power conversion circuits, an output power detection circuit and an output current detection circuit and is electrically connected with the lithium battery energy storage module and the discharge module, the power conversion module obtains the residual electric quantity data of the lithium battery energy storage module, and the power of the lithium battery energy storage module is distributed to the discharge module through the plurality of power conversion circuits;
and the temperature control module is electrically connected with the lithium battery energy storage module and used for controlling the temperature of the lithium battery energy storage module.
Preferably, in the passive protection and active protection system for lithium battery energy storage, an inverter circuit is disposed in the discharge module.
Based on the above, the inverter circuit improves the stability of the discharge module.
Preferably, in the above-mentioned passive protection and active protection system for lithium electricity energy storage, the energy storage controller is provided with a DSP controller, and the DSP controller controls the turning on and off of the charging module by sending out a control pulse.
Based on the above, control pulse can realize switching on and shutting off to the module of charging, and then reaches the function to lithium electricity energy storage module protection, avoids overflowing, excessive pressure, transshipping or long-time charging operation, and reduces the life problem of battery.
Preferably, in the passive protection and active protection system for lithium battery energy storage, a crystal oscillator timing circuit is arranged in the temperature control module, and the crystal oscillator timing circuit controls the on-off time of the temperature control module.
Based on the above, the circuit is timed by the crystal oscillator, so as to be convenient for use.
Preferably, in the passive protection and active protection system for lithium battery energy storage, a current detection circuit and a voltage detection circuit are arranged in the lithium battery energy storage module, and the current detection circuit and the voltage detection circuit output current and voltage signals in the lithium battery energy storage module.
Based on the above, the electric quantity information in the lithium battery energy storage module can be monitored.
Preferably, in the passive protection and active protection system for lithium battery energy storage, an inverter is disposed at an output end of the discharge module.
Based on the above, the discharge module can be adapted to different DC voltage requirements by the arrangement of the power conversion circuit.
A method for a passive protection and active protection system of lithium battery energy storage specifically comprises the following steps:
firstly, a charging and discharging interface of the lithium battery energy storage module is correspondingly connected with the charging module and the discharging module, a power conversion module connected with the discharging module and a temperature control module for controlling the temperature of the lithium battery energy storage module are constructed, so that the lithium battery energy storage module is in two states of charging and discharging;
acquiring real-time output data of a power supply of the lithium battery energy storage module, presetting the fixed temperature of the lithium battery energy storage module according to the temperature control module, acquiring the output current and voltage of the power supply of the lithium battery energy storage module through the current detection circuit and the voltage detection circuit, and acquiring the maximum power data of the detected power conversion circuit through the power detection circuit;
acquiring residual electric quantity data of the lithium battery energy storage module, detecting open-circuit voltage and current data through power conversion circuits with different multiplying powers under the condition of discharging by combining with initial charge quantity parameters of the lithium battery energy storage module, calculating the charge state of the battery, and acquiring the residual electric quantity data of the lithium battery energy storage module by combining with capacity fading factors;
and step four, the power conversion module distributes the power of the lithium battery energy storage module, the power conversion module is configured with different power conversion circuits according to the voltage and current data and the residual electric quantity data, and the currently configured power conversion circuit discharges.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, a test scheme is formulated according to two states of charging and discharging of the lithium battery energy storage, and real-time data of the lithium battery energy storage during charging and discharging under different temperatures and different currents are recorded; and the residual electric quantity of the lithium battery energy storage is obtained by combining the temperature performance of the lithium battery energy storage and analyzing the characteristics of the power supply output current, the maximum power and the like. According to the open-circuit voltage and the residual electric quantity, the on-off time of the power conversion switch is configured, different power conversion circuits are configured to distribute the lithium battery energy storage power, the passive protection and active protection functions during the lithium battery energy storage operation are realized, the long-time use of the lithium battery energy storage is ensured, and the development and the popularization of the lithium battery energy storage are facilitated.
Drawings
Fig. 1 is a block diagram of the modular components of the passive and active protection systems for lithium battery energy storage according to the present invention;
fig. 2 is a flow chart of a method for using the passive protection and active protection system for lithium battery energy storage according to the present invention.
Reference numbers in the figures: 1. a lithium battery energy storage module; 11. a voltage detection circuit; 12. a voltage detection circuit; 2. a charging module; 21. an energy storage controller; 3. a discharge module; 31. an inverter circuit; 4. a power conversion module; 41. a power conversion circuit; 42. an output power detection circuit; 43. an output current detection circuit; 5. a temperature control module; 51. a crystal oscillator timing circuit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: passive protection and active protection system of lithium electricity energy storage includes: the lithium battery energy storage module 1 is used for storing the electric quantity of the lithium battery; the charging module 2 is provided with an energy storage controller 21, and the input end of the charging module 2 is connected to a power grid and is electrically connected with the lithium battery energy storage module 1 to charge the lithium battery energy storage module 1; the discharging module 3 is electrically connected with the lithium battery energy storage module 1 and discharges the lithium battery energy storage module 1; the power conversion module 4 is provided with a plurality of power conversion circuits 41, an output power detection circuit 42 and an output current detection circuit 43, is electrically connected with the lithium battery energy storage module 1 and the discharge module 3, obtains the residual electric quantity data of the lithium battery energy storage module 1 by the power conversion module 4, and distributes the power of the lithium battery energy storage module to the discharge module 3 through the plurality of power conversion circuits 41; and the temperature control module 5 is electrically connected with the lithium battery energy storage module 1 and used for controlling the temperature of the lithium battery energy storage module 1.
Preferably, the discharge module 3 is provided with an inverter circuit 31, and the inverter circuit 31 improves the stability of the discharge module 3.
Preferably, energy storage controller 21 disposes the DSP controller, and the DSP controller can realize switching on and shutting off charging module 2 through sending control pulse in order to control charging module 2, through control pulse, and then reach the function to the protection of lithium electricity energy storage module 1, avoid overflowing, excessive pressure, transship or long-time charging operation damage battery quality.
Further, a crystal oscillator timing circuit 51 is disposed in the temperature control module 5, and the crystal oscillator timing circuit 51 controls the on/off time of the temperature control module 5, so as to facilitate the use through the installation of the crystal oscillator timing circuit 51.
It should be noted that the lithium battery energy storage module 1 is provided with a current detection circuit 11 and a voltage detection circuit 12, and the current detection circuit 11 and the voltage detection circuit 12 output current and voltage signals in the lithium battery energy storage module 1, so that the electric quantity information in the lithium battery energy storage module 1 can be monitored.
Referring to fig. 2, a method for a passive protection and active protection system for lithium battery energy storage specifically includes the following steps:
firstly, a charging and discharging system of a lithium battery energy storage module 1 is provided, a charging and discharging interface of the lithium battery energy storage module 1 is correspondingly connected with a charging module 2 and a discharging module 3, a power conversion module 4 connected with the discharging module 3 and a temperature control module 5 for controlling the temperature of the lithium battery energy storage module 1 are formed, and the lithium battery energy storage module 1 is in a charging state and a discharging state;
acquiring real-time output data of a power supply of the lithium battery energy storage module 1, acquiring output current and voltage of the power supply of the lithium battery energy storage module 1 through a current detection circuit 11 and a voltage detection circuit 12 according to a fixed temperature preset by a temperature control module 5 of the lithium battery energy storage module, and acquiring maximum power data of a detected power conversion circuit 41 through a power detection circuit 42;
acquiring residual electric quantity data of the lithium battery energy storage module 1, detecting open-circuit voltage and current data through the power conversion circuit 41 with different multiplying powers under the condition of discharging by combining with initial charge quantity parameters of the lithium battery energy storage module 1, calculating the charge state of the battery, and acquiring the residual electric quantity data of the lithium battery energy storage module by combining with capacity fading factors;
step four, the power conversion module 4 distributes the power of the lithium battery energy storage module, the power conversion module 4 is configured with different power conversion circuits 41 according to the voltage and current data and the remaining electric quantity data, and the currently configured power conversion circuits 41 are discharged to the discharge module 3.
In summary, according to the invention, a test scheme is specifically formulated according to two states of charging and discharging of the lithium battery energy storage, and real-time data of the lithium battery energy storage during charging and discharging under different temperatures and different currents are recorded; the temperature performance of the lithium battery energy storage is combined, the characteristics of power output current, maximum power and the like are analyzed, the residual electric quantity of the lithium battery energy storage is obtained, the on-off time of the power conversion switch is configured according to the open-circuit voltage and the residual electric quantity, different power conversion circuits are configured to distribute the lithium battery energy storage power, the passive protection and active protection functions of the lithium battery during the lithium battery energy storage operation are realized, the long-time use of the lithium battery energy storage is ensured, and the development and popularization of the lithium battery energy storage are facilitated.
On the basis of researching different transmission rules of charging and discharging in the later stage, aiming at different connection modes such as common positive, common negative, same port and different port, on one hand, the mathematical expression and the charge state of open-circuit voltage under different discharging conditions of large multiplying power and small multiplying power are established, and the technologies of lithium battery energy storage operation protection, passive protection and active protection are researched; on the other hand, various power conversion circuits are designed to meet different application occasions, parameters such as inductance and capacitance in the power conversion circuits are calculated, parameters such as voltage, current, internal resistance and switched-on capacitance of the power conversion switching elements are selected, and different voltage and current grades are matched.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. Passive protection and active protection system of lithium electricity energy storage, its characterized in that includes:
the lithium battery energy storage module (1) is used for storing the electric quantity of the lithium battery;
the charging module (2) is provided with an energy storage controller (21), the input end of the charging module (2) is connected to a power grid and is electrically connected with the lithium battery energy storage module (1) to charge the lithium battery energy storage module (1);
the discharging module (3) is electrically connected with the lithium battery energy storage module (1) and discharges the lithium battery energy storage module (1);
the power conversion module (4) is provided with a plurality of power conversion circuits (41), an output power detection circuit (42) and an output current detection circuit (43), and is electrically connected with the lithium battery energy storage module (1) and the discharge module (3), the power conversion module (4) obtains the residual electric quantity data of the lithium battery energy storage module (1), and the power of the lithium battery energy storage module is distributed to the discharge module (3) through the plurality of power conversion circuits (41);
the temperature control module (5) is electrically connected with the lithium battery energy storage module (1) and used for controlling the temperature of the lithium battery energy storage module (1).
2. The passive and active protection system for lithium battery energy storage according to claim 1, characterized in that: an inverter circuit (31) is arranged in the discharging module (3).
3. The passive and active protection system for lithium battery energy storage according to claim 1, characterized in that: the energy storage controller (21) is provided with a DSP controller, and the DSP controller sends out control pulses to control the on and off of the charging module (2).
4. The passive and active protection system for lithium battery energy storage according to claim 1, characterized in that: a crystal oscillator timing circuit (51) is arranged in the temperature control module (5), and the crystal oscillator timing circuit (51) controls the on-off time of the temperature control module (5).
5. The passive and active protection system for lithium battery energy storage according to claim 1, characterized in that: the lithium battery energy storage module is characterized in that a current detection circuit (11) and a voltage detection circuit (12) are arranged in the lithium battery energy storage module (1), and the current detection circuit (11) and the voltage detection circuit (12) output current and voltage signals in the lithium battery energy storage module (1).
6. The passive and active protection system for lithium battery energy storage according to claim 1, characterized in that: an inverter is arranged at the output end of the discharging module (3).
7. Method for the passive and active protection system for the energy storage of lithium batteries according to any one of claims 1 to 6, characterized in that it comprises in particular the following steps:
firstly, a charging and discharging system of a lithium battery energy storage module (1) is provided, a charging and discharging interface of the lithium battery energy storage module (1) is correspondingly connected with a charging module (2) and a discharging module (3), a power conversion module (4) connected with the discharging module (3) and a temperature control module (5) for controlling the temperature of the lithium battery energy storage module (1) are formed, and the lithium battery energy storage module (1) is enabled to be in two states of charging and discharging;
acquiring real-time output data of a power supply of the lithium battery energy storage module (1), presetting fixed temperature of the lithium battery energy storage module according to the temperature control module (5), acquiring output current and voltage of the power supply of the lithium battery energy storage module (1) through the current detection circuit (11) and the voltage detection circuit (12), and acquiring maximum power data of the detected power conversion circuit (41) through the power detection circuit (42);
acquiring residual electric quantity data of the lithium battery energy storage module (1), detecting open-circuit voltage and current data through a power conversion circuit (41) with different multiplying powers under the condition of discharging by combining with initial charge quantity parameters of the lithium battery energy storage module (1), calculating the charge state of the battery, and acquiring the residual electric quantity data of the lithium battery energy storage module by combining with a capacity fading factor;
step four, the power conversion module (4) distributes the power of the lithium battery energy storage module, different power conversion circuits (41) are configured on the power conversion module (4) according to the voltage and current data and the residual electric quantity data, and the currently configured power conversion circuits (41) are converted into the discharging module (3) to be discharged.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102122826A (en) * | 2011-01-17 | 2011-07-13 | 中国南方电网有限责任公司电网技术研究中心 | Energy storage bidirectional current converter for high-capacity storage battery |
| CN108448699A (en) * | 2018-03-29 | 2018-08-24 | 西安特锐德智能充电科技有限公司 | The charge/discharge control method of direct current micro-grid system and its electric vehicle |
| CN207772914U (en) * | 2017-11-14 | 2018-08-28 | 深圳前海易威管理咨询有限公司 | Charging equipment of electric automobile and accumulation power supply vehicle |
| CN112519620A (en) * | 2020-11-25 | 2021-03-19 | 湖北追日电气股份有限公司 | Flexible charging system for electric automobile and control method |
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- 2021-12-27 CN CN202111611706.8A patent/CN114268152A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102122826A (en) * | 2011-01-17 | 2011-07-13 | 中国南方电网有限责任公司电网技术研究中心 | Energy storage bidirectional current converter for high-capacity storage battery |
| CN207772914U (en) * | 2017-11-14 | 2018-08-28 | 深圳前海易威管理咨询有限公司 | Charging equipment of electric automobile and accumulation power supply vehicle |
| CN108448699A (en) * | 2018-03-29 | 2018-08-24 | 西安特锐德智能充电科技有限公司 | The charge/discharge control method of direct current micro-grid system and its electric vehicle |
| CN112519620A (en) * | 2020-11-25 | 2021-03-19 | 湖北追日电气股份有限公司 | Flexible charging system for electric automobile and control method |
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