CN111404214A - Detection protection system of multiple series high-voltage battery packs based on ESS - Google Patents
Detection protection system of multiple series high-voltage battery packs based on ESS Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims abstract description 66
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- 238000007599 discharging Methods 0.000 claims abstract description 16
- 238000004146 energy storage Methods 0.000 claims abstract description 12
- 230000007175 bidirectional communication Effects 0.000 claims abstract description 11
- 230000008054 signal transmission Effects 0.000 claims description 13
- 238000005070 sampling Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 7
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- 229910044991 metal oxide Inorganic materials 0.000 claims description 4
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- 230000002035 prolonged effect Effects 0.000 abstract description 3
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 7
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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
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0019—Circuits for equalisation of charge between batteries using switched or multiplexed charge circuits
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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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
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
Abstract
An ESS-based detection protection system for multiple series high voltage battery packs, comprising: the battery module comprises a plurality of single batteries which are connected in series, and a temperature acquisition module for acquiring the temperature of the battery module; the detection module comprises a total current detection module and a single battery detection module; the slave control module is used for acquiring voltage information, temperature information and a voltage balance control signal; the CAN communication module is used for realizing the bidirectional communication between the slave control module and the master control module; the main control module is used for acquiring voltage information, temperature information, current information, residual energy and voltage balance signals; the energy management system is used for managing the whole set of equipment; the energy storage converter is used for controlling the charging and discharging control of the battery pack; and the clock module is used for recording the charging and discharging time of the battery pack. The invention has the beneficial effects that: the high integration, the slave control module can be internally or externally connected in the battery module, the service life of the battery pack is prolonged, and the overcharge and over-discharge of the battery are prevented; the battery pack capacity can be accurately estimated.
Description
Technical Field
The invention relates to a detection and protection system of a plurality of series high-voltage battery packs based on an ESS (energy storage system), belonging to the technical field of battery pack (pack) manufacturing.
Background
The lithium battery cell (cell) forms the most basic elements of the battery module and the battery pack, and the voltage provided by the common battery cell is between 3V and 4V; lithium battery module (Batteries): the battery pack is composed of a plurality of single batteries, forms a single physical module and provides higher voltage and capacity; lithium battery pack (pack): generally, a plurality of battery modules are assembled, and a battery management system (bms), that is, a product finally provided to a user by a battery factory, is also added. In the use process of the lithium battery pack (pack), the single batteries are required to have high consistency in capacity, internal resistance, voltage, discharge curve and service life, in addition, the cycle life of the lithium battery pack (pack) is shorter than that of a single battery, the lithium battery pack (pack) can only be used under a limited condition, and the protection board of the lithium battery pack (pack) is required to have a charge equalization function.
To a certain extent, the performance of battery cell has influenced the performance of battery module and then the performance of group battery (pack), has finally influenced whole battery system's performance. Therefore, when designing the battery pack, the material and shape of the battery core are selected, and the consistency of the battery monomer and the uniform heat dissipation of the battery module are ensured, so as to improve the service life and the safety of the battery system.
In addition, the management system of the battery pack needs to determine the state of the entire battery system by detecting the states of the individual batteries in the battery pack, and perform corresponding control adjustment and policy implementation on the battery system according to the states of the individual batteries, so as to realize charging and discharging management on the battery system and the individual batteries, and ensure that the battery system operates safely and stably.
Disclosure of Invention
In order to solve the problems, the invention provides a detection and protection system of a plurality of series high-voltage battery packs based on an ESS (energy storage system), which is highly integrated, a slave control module can be internally or externally connected in a battery module, the service life of the battery pack can be prolonged, and the battery is prevented from being overcharged and overdischarged; the battery pack capacity can be accurately estimated.
The invention discloses a detection and protection system of a plurality of series high-voltage battery packs based on ESS, which is characterized by comprising the following components:
the battery module comprises a plurality of single batteries which are connected in series, and a temperature acquisition module for acquiring the temperature of the battery module;
the detection module comprises a total current detection module and a single battery detection module, wherein the signal input end of the total current detection module is in signal connection with the signal output end of the battery module, and the signal output end of the total current detection module is in signal connection with the signal input end of the main control module and is used for acquiring a current signal of the single battery; the signal input end of the single battery detection module is in signal connection with the signal output end of the battery module, and the signal output end of the single battery detection module is in signal connection with the signal input end of the slave control module and is used for detecting parameters of the single battery;
the signal input end of the slave control module is in signal connection with the signal output end of the single battery detection module, and the signal transmission end of the slave control module is in bidirectional communication with the signal transmission end of the CAN communication module and is used for acquiring voltage information, temperature information and voltage balance control signals;
the signal transmission end of the CAN communication module is in bidirectional communication with the signal transmission ends of the slave control module and the master control module respectively, and the CAN communication module is used for realizing bidirectional communication between the slave control module and the master control module;
the signal output end of the main control module is in signal connection with the signal output ends of the energy management system and the energy storage converter and is used for acquiring voltage information, temperature information, current information, residual energy and voltage balance signals;
the signal input end of the energy management system is in signal connection with the signal output end of the main control module and is used for managing the whole set of equipment;
the signal input end of the energy storage converter is in signal connection with the signal output end of the main control module and is used for controlling the charging and discharging of the battery pack;
and the signal output end of the clock module is in signal connection with the signal output end of the main control module and is used for recording the charging and discharging time of the battery pack.
The single battery detection module comprises a temperature acquisition module, a single voltage acquisition module and a battery equalization module, wherein:
the signal input end of the temperature acquisition module is in signal connection with the signal output end of the battery module, and the signal output end of the temperature acquisition module is in signal connection with the signal input end of the CAN communication module and is used for acquiring the temperature of the battery module;
the signal input end of the single voltage acquisition module is in signal connection with the signal output end of the battery module, and the signal output end of the single voltage acquisition module is in signal connection with the signal input end of the CAN communication module and is used for acquiring the voltage of the single battery;
and the signal input end of the battery equalization module is in signal connection with the signal output end of the battery module, and the signal output end of the battery equalization module is in signal connection with the signal input end of the CAN communication module and is used for performing voltage equalization control on the single battery.
The battery module is established ties by six battery cells and forms, and a plurality of battery modules establish ties and constitute the group battery, and battery cell is the main part of battery module, and battery module is the main part of group battery, there are voltage line interface, electric current line interface and the temperature line interface of providing outward on the battery module, voltage line, electric current line all are connected with battery cell, then constitute the pencil, rather than relative interface connection, the temperature line directly does not have the module with the battery and is connected, with temperature line interface connection.
The temperature acquisition module is used for acquiring the temperature of the battery module, mainly sampling temperature signals of the multiple paths of battery modules by using the analog switch, then directly sending sampling data to the slave control module, performing analog-to-digital conversion through the AD converter of the slave control module to acquire a temperature value of the battery module, and then sending the temperature data to the master control module through the isolated CAN communication module.
The single battery voltage acquisition module acquires the voltage of the single batteries in the battery module, the battery management chip is used for realizing the voltage management of the single batteries, the battery management chip adopts a TI battery management chip BQ76940, 15 single batteries are detected at most in series, the voltage precision is positive and negative 10MV, the communication mode between the battery management chip and the slave control module is an I2C interface, and the voltage information of the single batteries is sent to the slave control module from the battery management chip through the communication between the slave control module and the battery management chip.
The battery balancing module balances the voltage of the single battery in a passive balancing mode, the balancing current is less than 100MA, and the MOS tube is used as a switch to add the balancing resistor, so that the voltage deviation of the single battery is kept in an expected range.
The slave control module adopts an STM32 single chip microcomputer and is provided with an AD converter, the temperature input interface is directly subjected to analog-to-digital conversion, and then the temperature information of the battery module is obtained; I2C communication is carried out between the slave control module and the BQ76940 battery management chip, and single battery voltage information is obtained; the slave control module is provided with a CAN controller and is directly connected with the CAN communication module to achieve data information interaction with the master control module; and the slave control module acquires the voltage balance control signal from the master control module so as to start the voltage balance function.
The total current detection module converts the current signal of the single battery into a voltage signal and directly sends the voltage signal to the main control module; the total current detection module adopts a Hall current sensor, and the current sampling precision reaches 10MA in the current range of-30A to + 30A.
The clock module adopts a DS1390 chip, the charge and discharge time of the battery pack is recorded by the clock chip, and the clock module starts to time after the battery pack is charged and discharged; the clock module and the master control module are communicated in an SPI (serial peripheral interface) mode, the lowest unit is millisecond, and the master control module acquires charge and discharge time data after calibration so as to guarantee the accuracy of residual energy calculation.
The CAN communication module debugs and debugs signals transmitted on the CAN bus through the CAN bus, and converts the signals into effective data which CAN be transmitted to the master control module and the slave control module to be recognized and processed, so that the communication between the slave control module and the master control module is realized; the phase difference distance between the slave control module and the master control module reaches 40 meters, and the communication speed is 1Mbms, so that the communication between one master control module and a plurality of slave control modules is realized.
The master control module is communicated with the slave control module through the isolated CAN communication module to acquire temperature information of the battery module and voltage information of the single battery, data arrangement is carried out on the voltage of the single battery, when the lowest battery voltage is obtained, other battery voltages are compared with the lowest battery voltage, and if the difference value is greater than 30MV, the limit of starting voltage balance is reached, so that whether voltage balance control is carried out or not is judged; the data of the Hall current sensor of the total current detection module is connected with hardware to obtain the actual current of the single battery; if the current of the single battery, the voltage of the single battery and the temperature of the battery module are abnormal, the main control module can directly disconnect a charge-discharge loop through an MOS (metal oxide semiconductor) tube to protect the battery; the current signal of the total current detection module is acquired; and performing SPI communication with the DS1390 of the time module to acquire battery pack charging and discharging time data so as to calculate residual energy.
The invention has the beneficial effects that: the high integration, the slave control module can be internally or externally connected in the battery module, the service life of the battery pack can be prolonged, and the overcharge and over-discharge of the battery can be prevented; the battery pack capacity can be accurately estimated.
Drawings
Fig. 1 is a working process diagram of a detection protection system of a plurality of series high-voltage battery packs.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
With reference to the accompanying drawings:
embodiment 1 a detection and protection system for multiple series high voltage battery packs based on ESS according to the present invention comprises:
the battery module 1 comprises a plurality of single batteries 11 which are connected in series, and a temperature acquisition module for acquiring the temperature of the battery module;
the detection module 2 comprises a total current detection module 21 and a single battery detection module 22, wherein the signal input end of the total current detection module is in signal connection with the signal output end of the battery module, and the signal output end of the total current detection module is in signal connection with the signal input end of the main control module and is used for acquiring a current signal of a single battery; the signal input end of the single battery detection module is in signal connection with the signal output end of the battery module, and the signal output end of the single battery detection module is in signal connection with the signal input end of the slave control module and is used for detecting parameters of the single battery;
the signal input end of the slave control module 3 is in signal connection with the signal output end of the single battery detection module, and the signal transmission end of the slave control module is in bidirectional communication with the signal transmission end of the CAN communication module and is used for acquiring voltage information, temperature information and voltage balance control signals;
the CAN communication module 4 is used for realizing the bidirectional communication between the slave control module and the master control module, and the signal transmission end of the CAN communication module is respectively in bidirectional communication with the signal transmission ends of the slave control module and the master control module;
the main control module 5 is in bidirectional communication with a signal transmission end of the CAN communication module, is in signal connection with signal output ends of the total current detection module and the clock module, and is in signal connection with signal output ends of the energy management system and the energy storage converter, and is used for acquiring voltage information, temperature information, current information, residual energy and voltage balance signals;
the signal input end of the energy management system 6 is in signal connection with the signal output end of the main control module and is used for managing the whole set of equipment;
the signal input end of the energy storage converter 7 is in signal connection with the signal output end of the main control module and is used for controlling the charging and discharging of the battery pack;
and the signal output end of the clock module 8 is in signal connection with the signal output end of the main control module and is used for recording the charging and discharging time of the battery pack.
The single battery detection module 22 includes a temperature acquisition module 221, a single voltage acquisition module 222, and a battery equalization module 223, wherein:
the signal input end of the temperature acquisition module 221 is in signal connection with the signal output end of the battery module, and the signal output end of the temperature acquisition module is in signal connection with the signal input end of the CAN communication module and is used for acquiring the temperature of the battery module;
the signal input end of the single voltage acquisition module 222 is in signal connection with the signal output end of the battery module, and the signal output end of the single voltage acquisition module is in signal connection with the signal input end of the CAN communication module and is used for acquiring the voltage of the single battery;
and a battery equalization module 223, a signal input end of which is in signal connection with a signal output end of the battery module, and a signal output end of which is in signal connection with a signal input end of the CAN communication module, for performing voltage equalization control on the single battery.
Battery module 1 is established ties by six battery cells and forms, and a plurality of battery modules establish ties and constitute the group battery, and battery cell is the main part of battery module, and battery module is the main part of group battery, there are voltage line interface, current line interface and temperature line interface of providing outward on the battery module, voltage line, current line all are connected with battery cell, then constitute the pencil, rather than relative interface connection, the temperature line directly does not have the module with the battery and is connected, with temperature line interface connection.
The temperature acquisition module 221 is used for acquiring the temperature of the battery module, mainly sampling temperature signals of the multiple paths of battery modules by using the analog switch, then directly sending the sampling data to the slave control module, performing analog-to-digital conversion through the AD converter of the slave control module to acquire a temperature value of the battery module, and then sending the temperature data to the master control module through the isolated CAN communication module.
The cell voltage acquisition module 222 acquires the voltage of the cells in the battery module, and utilizes a battery management chip to realize the voltage management of the plurality of cells, the battery management chip adopts a TI battery management chip BQ76940, detects that at most 15 cells are connected in series, has the voltage precision of plus or minus 10MV, and has an I2C interface as a communication mode with the slave control module, and sends the voltage information of the plurality of cells to the slave control module from the battery management chip through the communication between the slave control module and the battery management chip.
The battery balancing module 223 balances the voltage of the single battery in a passive balancing mode, the balancing current is less than 100MA, and the MOS tube is used as a switch to add a balancing resistor, so that the voltage deviation of the single battery is kept in an expected range.
The slave control module 3 adopts an STM32 single chip microcomputer and is provided with an AD converter, the temperature input interface is directly subjected to analog-to-digital conversion, and then the temperature information of the battery module is obtained; I2C communication is carried out between the slave control module and the BQ76940 battery management chip, and single battery voltage information is obtained; the slave control module is provided with a CAN controller and is directly connected with the CAN communication module to achieve data information interaction with the master control module; and the slave control module acquires the voltage balance control signal from the master control module so as to start the voltage balance function.
The total current detection module 21 converts the current signal of the single battery into a voltage signal and directly sends the voltage signal to the main control module; the total current detection module adopts a Hall current sensor, and the current sampling precision reaches 10MA in the current range of-30A to + 30A.
The clock module 8 adopts a DS1390 chip, the clock chip is used for recording the charging and discharging time of the battery pack, and the clock module starts to time after the battery pack is charged and discharged; the clock module and the master control module are communicated in an SPI (serial peripheral interface) mode, the lowest unit is millisecond, and the master control module acquires charge and discharge time data after calibration so as to guarantee the accuracy of residual energy calculation.
The CAN communication module 4 debugs and debugs signals transmitted on the CAN bus through the CAN bus, and converts the signals into effective data which CAN be recognized and processed by the master control module and the slave control module, so that the communication between the slave control module and the master control module is realized; the phase difference distance between the slave control module and the master control module reaches 40 meters, and the communication speed is 1Mbms, so that the communication between one master control module and a plurality of slave control modules is realized.
The master control module 5 communicates with the slave control module through the isolated CAN communication module to acquire temperature information of the battery module and voltage information of the single battery, and performs data arrangement on the voltage of the single battery, when the lowest battery voltage is obtained, other battery voltages are compared with the lowest battery voltage, and if the difference value is greater than 30MV, the limit of starting voltage equalization is reached, so as to judge whether to perform voltage equalization control; the data of the Hall current sensor of the total current detection module is connected with hardware to obtain the actual current of the single battery; if the current of the single battery, the voltage of the single battery and the temperature of the battery module are abnormal, the main control module can directly disconnect a charge-discharge loop through an MOS (metal oxide semiconductor) tube to protect the battery; the current signal of the total current detection module is acquired; and performing SPI communication with the DS1390 of the time module to acquire battery pack charging and discharging time data so as to calculate residual energy.
Embodiment 2 the present invention provides a system for detecting and protecting multiple series high-voltage battery packs based on ESS (energy storage system), including:
the battery module 1 is formed by combining lithium ion batteries in a series mode and additionally installing a single battery monitoring and managing device to form a single battery and battery pack (pack) intermediate product;
the temperature acquisition module 221 is used for acquiring the temperature of the battery module in real time;
the single voltage acquisition module 222 is used for acquiring the voltage of the single battery of the battery module in real time;
the voltage balancing module 223 is used for performing voltage balancing control on the single batteries of the battery module;
the slave control module 3 is used for acquiring the voltage and temperature information of the single batteries of the battery module and acquiring and transmitting a voltage balance control signal;
the total current detection module 21 is configured to obtain a current signal of a single battery of the battery module, and convert the current signal into a voltage signal;
the clock module 8 is used for recording the charging and discharging time of the battery pack;
the CAN communication module 4 is used for realizing the communication between the slave control module and the master control module;
the main control module 5 is used for acquiring voltage information, temperature information, current information and residual energy (SOC) of the single batteries of the battery module, controlling the voltage equalization signal and finally controlling the battery module through the information;
energy storage converter (PCS) 7: communicating with the main control module to complete control command and information interaction;
and an Energy Management System (EMS) 6: and the main control module is communicated with and used for issuing protection parameters and control commands.
Battery module 1, single battery module are established ties by a plurality of battery cell 11 and are formed, and a plurality of battery modules establish ties and constitute the group battery, and battery cell is the main part of battery module, and battery module is the main part of group battery, have on the battery module and externally provide voltage line interface, current line interface and temperature line interface, voltage line, current line all are connected with battery cell, then constitute the pencil, rather than relative interface connection, the temperature line directly does not have the module with the battery and is connected, with temperature line interface connection.
The temperature acquisition module 221 is used for acquiring the temperature of the battery module, mainly sampling temperature signals of the multiple paths of battery modules by using the analog switch, then directly sending the sampling data to the slave control module, performing analog-to-digital conversion through the AD converter of the slave control module to acquire a temperature value of the battery module, and then sending the temperature data to the master control module through the isolated CAN communication module.
The cell voltage acquisition module 222: the method comprises the steps of collecting voltage of single batteries in a battery module, utilizing a battery management chip to realize voltage management of a plurality of single batteries, adopting a TI battery management chip BQ76940, detecting at most 15 single batteries in series connection, enabling the voltage precision to be within the range of plus or minus 10MV, enabling a communication mode between the battery management chip and a slave control module to be an I2C interface, and then sending voltage information of the plurality of single batteries to the slave control module from the battery management chip through communication between the slave control module and the battery management chip.
The voltage balancing module 223 balances the voltage of the single batteries in a passive balancing mode, the balancing current is less than 100MA, and the MOS tube is used as a switch to add the balancing resistor, so that the voltage deviation of the single batteries is kept in an expected range, and each single battery is not damaged in the using process. The voltage equalization signal is controlled by the master control module and then sent to the slave control module, the slave control module starts a voltage equalization function, the voltage equalization control is carried out on the battery equalization module, and finally the battery equalization signal is used for prolonging the battery charging time when the voltage of the single battery is the lowest value. 4.
The slave control module 3 adopts an STM32 single chip microcomputer and is provided with an AD converter, can directly perform analog-to-digital conversion on a temperature input interface, and then acquires temperature information of the battery module; the slave control module can perform I2C communication with the BQ76940 battery management chip to acquire single battery voltage information; the slave control module is provided with a CAN controller and CAN be directly connected with the isolated CAN communication module to achieve data information interaction with the master control module; in addition, the slave control module can also acquire a voltage balance control signal from the master control module, so as to start a voltage balance function.
The total current detection module 21 converts the current signal of the single battery into a voltage signal, and directly sends the voltage signal to the main control module. The total current detection module adopts a Hall current sensor, and the current sampling precision can reach 10MA in the current range of-30A to + 30A.
The clock module 8 adopts a DS1390 chip, records the charging and discharging time of the battery pack by using the clock chip, and starts to time after the battery pack is charged and discharged; the clock module and the master control module are communicated in an SPI (serial peripheral interface) mode, the lowest unit can be millisecond, and the master control module can accurately acquire charging and discharging time data after calibration, so that the accuracy of residual energy (SOC) calculation is guaranteed.
The CAN communication module 4: the signals transmitted on the CAN bus are debugged and debugged through the CAN bus, and are converted into effective data which CAN be transmitted to the master control module and the slave control module to be recognized and processed, so that the communication between the slave control module and the master control module is realized; the phase difference distance between the slave control module and the master control module reaches 40 meters, and the communication speed can be realized under the condition of 1Mbms, so that the communication between one master control module and a plurality of slave control modules can be realized.
The main control module 5 is communicated with the slave control module through the isolated CAN communication module to acquire temperature information of the battery module and voltage information of the single battery, and performs data arrangement on the voltage of the single battery, when the lowest battery voltage is obtained, other battery voltages are compared with the lowest battery voltage, and if the difference value is greater than 30MV (settable), the limit of starting voltage equalization (settable) is reached, so that whether voltage equalization control is performed or not is judged; in addition, the data of the Hall current sensor of the total current detection module is connected with hardware to obtain the actual current of the single battery; if the current of the single battery, the voltage of the single battery and the temperature of the battery module are abnormal, the main control module can directly disconnect a charge-discharge loop through an MOS (metal oxide semiconductor) tube to protect the battery; the current signal of the total current detection module can be obtained; SPI communication is performed with DS1390 of the time module to acquire battery pack charge-discharge time data to calculate a remaining energy (SOC).
And the energy storage converter (PCS)7 is used for carrying out charge and discharge control on the battery pack, is communicated with the main control module and completes charge and discharge control commands and information interaction.
The Energy Management System (EMS)6, which communicates with the main control module, is used to manage the whole set of equipment, including issuing protection parameters and control commands.
The embodiments described in this specification are merely illustrative of implementations of the inventive concept and the scope of the present invention should not be considered limited to the specific forms set forth in the embodiments but includes equivalent technical means as would be recognized by those skilled in the art based on the inventive concept.
Claims (10)
1. An ESS-based detection protection system for multiple series high voltage battery packs, comprising:
the battery module comprises a plurality of single batteries which are connected in series, and a temperature acquisition module for acquiring the temperature of the battery module;
the detection module comprises a total current detection module and a single battery detection module, wherein the signal input end of the total current detection module is in signal connection with the signal output end of the battery module, and the signal output end of the total current detection module is in signal connection with the signal input end of the main control module and is used for acquiring a current signal of the single battery; the signal input end of the single battery detection module is in signal connection with the signal output end of the battery module, and the signal output end of the single battery detection module is in signal connection with the signal input end of the slave control module and is used for detecting parameters of the single battery;
the signal input end of the slave control module is in signal connection with the signal output end of the single battery detection module, and the signal transmission end of the slave control module is in bidirectional communication with the signal transmission end of the CAN communication module and is used for acquiring voltage information, temperature information and voltage balance control signals;
the signal transmission end of the CAN communication module is in bidirectional communication with the signal transmission ends of the slave control module and the master control module respectively, and the CAN communication module is used for realizing bidirectional communication between the slave control module and the master control module;
the signal output end of the main control module is in signal connection with the signal output ends of the energy management system and the energy storage converter and is used for acquiring voltage information, temperature information, current information, residual energy and voltage balance signals;
the signal input end of the energy management system is in signal connection with the signal output end of the main control module and is used for managing the whole set of equipment;
the signal input end of the energy storage converter is in signal connection with the signal output end of the main control module and is used for controlling the charging and discharging of the battery pack;
and the signal output end of the clock module is in signal connection with the signal output end of the main control module and is used for recording the charging and discharging time of the battery pack.
2. The ESS-based detection protection system for multiple series high voltage battery packs according to claim 1, wherein: the single battery detection module comprises a temperature acquisition module, a single voltage acquisition module and a battery equalization module, wherein:
the signal input end of the temperature acquisition module is in signal connection with the signal output end of the battery module, and the signal output end of the temperature acquisition module is in signal connection with the signal input end of the CAN communication module and is used for acquiring the temperature of the battery module;
the signal input end of the single voltage acquisition module is in signal connection with the signal output end of the battery module, and the signal output end of the single voltage acquisition module is in signal connection with the signal input end of the CAN communication module and is used for acquiring the voltage of the single battery;
and the signal input end of the battery equalization module is in signal connection with the signal output end of the battery module, and the signal output end of the battery equalization module is in signal connection with the signal input end of the CAN communication module and is used for performing voltage equalization control on the single battery.
3. The ESS-based detection protection system for multiple series high voltage battery packs according to claim 1, wherein: the battery module is established ties by six battery cells and forms, and a plurality of battery modules establish ties and constitute the group battery, and battery cell is the main part of battery module, and battery module is the main part of group battery, there are voltage line interface, electric current line interface and the temperature line interface of providing outward on the battery module, voltage line, electric current line all are connected with battery cell, then constitute the pencil, rather than relative interface connection, the temperature line directly does not have the module with the battery and is connected, with temperature line interface connection.
4. The ESS-based detection protection system for multiple series high voltage battery packs according to claim 2, wherein: the single battery voltage acquisition module acquires the voltage of the single batteries in the battery module, the battery management chip is used for realizing the voltage management of the single batteries, the battery management chip adopts a TI battery management chip BQ76940, 15 single batteries are detected at most in series, the voltage precision is positive and negative 10MV, the communication mode between the battery management chip and the slave control module is an I2C interface, and the voltage information of the single batteries is sent to the slave control module from the battery management chip through the communication between the slave control module and the battery management chip.
5. An ESS-based detection protection system for multiple series high voltage battery packs as claimed in claim 2 wherein: the battery balancing module balances the voltage of the single battery in a passive balancing mode, the balancing current is less than 100MA, and the MOS tube is used as a switch to add the balancing resistor, so that the voltage deviation of the single battery is kept in an expected range.
6. The ESS-based detection protection system for multiple series high voltage battery packs as claimed in claim 1 wherein: the slave control module adopts an STM32 single chip microcomputer and is provided with an AD converter, the temperature input interface is directly subjected to analog-to-digital conversion, and then the temperature information of the battery module is obtained; I2C communication is carried out between the slave control module and the BQ76940 battery management chip, and single battery voltage information is obtained; the slave control module is provided with a CAN controller and is directly connected with the CAN communication module to achieve data information interaction with the master control module; and the slave control module acquires the voltage balance control signal from the master control module so as to start the voltage balance function.
7. The ESS-based detection protection system for multiple series high voltage battery packs as claimed in claim 1 wherein: the total current detection module converts the current signal of the single battery into a voltage signal and directly sends the voltage signal to the main control module; the total current detection module adopts a Hall current sensor, and the current sampling precision reaches 10MA in the current range of-30A to + 30A.
8. The ESS-based detection protection system for multiple series high voltage battery packs as claimed in claim 1 wherein: the clock module adopts a DS1390 chip, the charge and discharge time of the battery pack is recorded by the clock chip, and the clock module starts to time after the battery pack is charged and discharged; the clock module and the master control module are communicated in an SPI (serial peripheral interface) mode, the lowest unit is millisecond, and the master control module acquires charge and discharge time data after calibration so as to guarantee the accuracy of residual energy calculation.
9. The ESS-based detection protection system for multiple series high voltage battery packs as claimed in claim 1 wherein: the CAN communication module debugs and debugs signals transmitted on the CAN bus through the CAN bus, and converts the signals into effective data which CAN be transmitted to the master control module and the slave control module to be recognized and processed, so that the communication between the slave control module and the master control module is realized; the phase difference distance between the slave control module and the master control module reaches 40 meters, and the communication speed is 1Mbms, so that the communication between one master control module and a plurality of slave control modules is realized.
10. The ESS-based detection protection system for multiple series high voltage battery packs as claimed in claim 1 wherein: the master control module is communicated with the slave control module through the isolated CAN communication module to acquire temperature information of the battery module and voltage information of the single battery, data arrangement is carried out on the voltage of the single battery, when the lowest battery voltage is obtained, other battery voltages are compared with the lowest battery voltage, and if the difference value is greater than 30MV, the limit of starting voltage balance is reached, so that whether voltage balance control is carried out or not is judged; the data of the Hall current sensor of the total current detection module is connected with hardware to obtain the actual current of the single battery; if the current of the single battery, the voltage of the single battery and the temperature of the battery module are abnormal, the main control module can directly disconnect a charge-discharge loop through an MOS (metal oxide semiconductor) tube to protect the battery; the current signal of the total current detection module is acquired; and performing SPI communication with the DS1390 of the time module to acquire battery pack charging and discharging time data so as to calculate residual energy.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112162201A (en) * | 2020-09-22 | 2021-01-01 | 中国第一汽车股份有限公司 | Detection system and method for battery module |
| CN113489086A (en) * | 2021-06-11 | 2021-10-08 | 王灏 | Refined state control system and method for matrix battery module |
| CN113659681A (en) * | 2021-08-19 | 2021-11-16 | 北京理工大学深圳汽车研究院(电动车辆国家工程实验室深圳研究院) | Slave control module, battery management system, method and storage medium |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011019329A (en) * | 2009-07-08 | 2011-01-27 | Toshiba Corp | Secondary battery device and vehicle |
| WO2018049817A1 (en) * | 2016-09-13 | 2018-03-22 | 沃太能源南通有限公司 | Energy-storage lithium battery pack, and capacity expansion method for same |
| CN207339332U (en) * | 2017-09-19 | 2018-05-08 | 浙江杭可科技股份有限公司 | 5V65A parallel connection 130A power battery discharge and recharge power supply boxs |
| CN109541477A (en) * | 2018-11-22 | 2019-03-29 | 浙江杭可科技股份有限公司 | Charge and discharge safety detection method and charge and discharge safety detection device |
| KR20200007572A (en) * | 2018-07-13 | 2020-01-22 | 주식회사 에스엘파워 | Battery |
| CN211908399U (en) * | 2020-03-02 | 2020-11-10 | 浙江杭可科技股份有限公司 | Detection protection system of multiple series high-voltage battery packs based on ESS |
-
2020
- 2020-03-02 CN CN202010135408.5A patent/CN111404214A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011019329A (en) * | 2009-07-08 | 2011-01-27 | Toshiba Corp | Secondary battery device and vehicle |
| WO2018049817A1 (en) * | 2016-09-13 | 2018-03-22 | 沃太能源南通有限公司 | Energy-storage lithium battery pack, and capacity expansion method for same |
| CN207339332U (en) * | 2017-09-19 | 2018-05-08 | 浙江杭可科技股份有限公司 | 5V65A parallel connection 130A power battery discharge and recharge power supply boxs |
| KR20200007572A (en) * | 2018-07-13 | 2020-01-22 | 주식회사 에스엘파워 | Battery |
| CN109541477A (en) * | 2018-11-22 | 2019-03-29 | 浙江杭可科技股份有限公司 | Charge and discharge safety detection method and charge and discharge safety detection device |
| CN211908399U (en) * | 2020-03-02 | 2020-11-10 | 浙江杭可科技股份有限公司 | Detection protection system of multiple series high-voltage battery packs based on ESS |
Non-Patent Citations (2)
| Title |
|---|
| 夏鸿飞;翁文锋;: "电动轨道车蓄电池监控研究", 铁道机车与动车, no. 09, 15 September 2017 (2017-09-15) * |
| 赵永鑫;雷霖;: "基于CAN总线的电动车锂电池管理系统", 成都大学学报(自然科学版), no. 04, 30 December 2015 (2015-12-30) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112162201A (en) * | 2020-09-22 | 2021-01-01 | 中国第一汽车股份有限公司 | Detection system and method for battery module |
| CN113489086A (en) * | 2021-06-11 | 2021-10-08 | 王灏 | Refined state control system and method for matrix battery module |
| CN113659681A (en) * | 2021-08-19 | 2021-11-16 | 北京理工大学深圳汽车研究院(电动车辆国家工程实验室深圳研究院) | Slave control module, battery management system, method and storage medium |
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