CN109066838A - A kind of power battery managing and control system - Google Patents
A kind of power battery managing and control system Download PDFInfo
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- CN109066838A CN109066838A CN201810822968.0A CN201810822968A CN109066838A CN 109066838 A CN109066838 A CN 109066838A CN 201810822968 A CN201810822968 A CN 201810822968A CN 109066838 A CN109066838 A CN 109066838A
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- H02J7/0022—
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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
- H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
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Abstract
The invention discloses a kind of power battery managing and control systems, including battery pack, local control unit and the central control unit communicated to connect by CAN bus and local control unit；Local control unit is used for signal acquisition, state estimation and the balanced management of each group of battery；The central control unit is for the voltage and current acquisition of integral battery group, charge and discharge control, battery protection, the collection local control unit information, data processing and storage and real-time display.The accurate estimation to all single battery SOC and the efficient active equalization based on battery SOC may be implemented in the present invention, and equalizing circuit structure is simple, and cost is relatively low, and Bidirectional charging-discharging equilibrium may be implemented, and euqalizing current has good balancing speed up to 3-5A.Equalizing circuit of the invention has good portfolio effect, can be by the difference equilibrium of different battery SOCs within 1%, and power battery managing and control system of the invention has great significance for the safe and stable and efficient operation of entire battery system.
Description
Technical field
The present invention relates to the technical field of power battery more particularly to a kind of power battery managing and control systems.
Background technique
Battery management system (Battery Management System, BMS) is electrokinetic cell system essential one
Part is widely used among the battery management of various electric cars.Battery management system generally mainly realizes following several respects
Function:
(1) all data when acquisition battery work in real time；Battery management system needs in acquisition battery pack in real time every piece
The information such as end voltage, temperature, assembled battery total voltage and the charging and discharging currents of single battery provide reliable number for battery status estimation
According to.Meanwhile battery pack operation conditions is provided in time, guarantee that battery pack is reliably and effectively run.
(2) accurately estimate the state of battery；The state of battery includes SOC, SOH and SOP etc. of battery (group).SOC, which refers to, to be worked as
The remaining capacity of preceding battery is the most important parameter of battery.The SOC of battery is that battery management system carries out other management works
Basis.Only under the premise of obtaining accurate SOC, system could make judgement appropriate accordingly, by battery management to best shape
State.SOH refers to the health degree of battery, refers to the ratio between battery current capacities and factory capacity, is to measure cell performance decay degree
Important indicator.SOP is the parameter for describing battery maximum charging and discharging capabilities, for estimating that next moment battery pack can be with input and output
Maximum power, avoid battery from abusing.
(3) balanced management is efficiently carried out；Equalization technique is one of the core technology in current battery management system.It is dynamic
Power battery is after being used in series, due to inconsistency etc., after a particular period of use, voltage, internal resistance and
Capacity will generate difference.And this species diversity can increased dramatically after by some charging-discharging cycles, finally influence battery
Service life [8].Therefore, equalization methods appropriate are selected, carrying out efficient equilibrium to discrepant battery seems very heavy
It wants.In addition to this, when battery is run in high-power situation, heat can be generated, just needs to carry out battery pack at this time appropriate
Heat management.
(4) other function；In addition to the functions discussed above, an outstanding battery management system should also have accident analysis
With alarm, the critical data record of battery operation and the functions such as Insulation monitoring and protection.These functions are for ensureing cell safety
Reliability service has highly important effect.
But current battery management system generallys use electric voltage equalization and passive equilibrium, causes kwh loss serious, manages
It is ineffective.
Summary of the invention
Based on the above the deficiencies in the prior art, technical problem solved by the invention is to provide a kind of power battery control
System, improves sampling precision, computing capability and the estimated accuracy of battery, and management effect is good.
In order to solve the above-mentioned technical problem, the present invention is achieved through the following technical solutions: the present invention provides a kind of power
Battery managing and control system including battery pack, the local control unit being electrically connected with the battery pack and passes through CAN bus and institute
State the central control unit of local control unit communication connection；
The local control unit is used for signal acquisition, state estimation and the balanced management of each group of battery；
The central control unit is used for the voltage and current acquisition of integral battery group, charge and discharge control, battery protection, receipts
Collect the local control unit information, data processing and storage and real-time display.
Embodiment as a preferred embodiment of the above technical solution, power battery managing and control system provided in an embodiment of the present invention is into one
Step includes some or all of following technical characteristic:
As an improvement of the above technical solution, the local control unit includes:
Control module is used for estimated battery state, and control balance module when equilibrium is needed to work；
Sampling module is connected with the controller, for the information sampled to be transmitted to the controller；
Balance module is connected with the controller；
Power module, connect respectively with the controller, sampling module and balance module and to controller, sampling module and
Balance module is powered.
As an improvement of the above technical solution, in one embodiment of the invention, the sampling module includes:
Voltage sampling circuit, the model INA148 including being converted to voltage over the ground for the end voltage by monoblock battery
Difference amplifier, for the model that is depressured of voltage of the difference amplifier output of the model INA148 will to be passed through
The operational amplifier of LMV358；
Current sampling circuit, for acquiring the euqalizing current of battery；
Temperature collection circuit, using model NTC-10K thermistor as temperature sensor, for acquiring the temperature of battery
Degree.
As an improvement of the above technical solution, the control module uses 32 micro-controls of model STM32F103RCT6
Device processed.
In one embodiment of the invention, the balance module includes switch arrays and two-way isolation DC/DC, wherein opening
Array is closed using the driving chip of model EMB1428 and double N-channel MOS TET of model SI7938DP；Two-way isolation DC/
The two-way forward converter of active clamp that DC is made of the power management chip of model EMB1499 and three external MOSFET.
As an improvement of the above technical solution, the central control unit include master controller, respectively with the main control
Total voltage acquisition module, total current acquisition module, data memory module, communication module and the display module of device electrical connection；
The master controller is the circuit for including model STM32F767IGT6 chip；
The total voltage acquisition module uses the voltage sensor of model LV25-P；
The total current acquisition module uses the current sensor of model CSNF661；
The data memory module is the circuit for including model MT29F4G08 chip.
As an improvement of the above technical solution, in one embodiment of the invention, the CAN bus is isolated using CAN
Transceiver module realizes signal isolation for being the differential level of CAN bus by TTL/COMS level translation.
Compared with prior art, technical solution of the present invention has the following beneficial effects: power battery control of the invention
System uses distributed frame, passes through CAN bus comprising a central control unit and multiple local control units, between them
Communication is established, the overall plan of system is devised, using host-guest architecture, i.e. a central control unit and multiple local controls are single
Member, local control unit are responsible for the acquisition of the signals such as the voltage, electric current, temperature of single group battery, single battery SOC estimation and equilibrium
Function, central control unit is responsible for the acquisition of the signals such as global voltage, electric current and system integrally controls, and passes through CAN therebetween
Bus communication.The accurate estimation to all single battery SOC and the efficient active based on battery SOC may be implemented in the present invention
Weighing apparatus, equalizing circuit structure is simple, and cost is relatively low, and Bidirectional charging-discharging equilibrium may be implemented, and euqalizing current has fine up to 3-5A
Balancing speed.Equalizing circuit of the invention has good portfolio effect, can be by the difference equilibrium of different battery SOCs 1%
Within, power battery managing and control system of the invention has the safe and stable and efficient operation of entire battery system important
Meaning.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects, features and advantages of the invention can
It is clearer and more comprehensible, below in conjunction with preferred embodiment, and cooperates attached drawing, detailed description are as follows.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, the attached drawing to embodiment is simply situated between below
It continues.
Fig. 1 is the power battery managing and control system structural schematic diagram of the preferred embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the local control unit of the power battery managing and control system of the preferred embodiment of the present invention；
Fig. 3 is the circuit diagram of the voltage sampling circuit of the power battery managing and control system of the preferred embodiment of the present invention；
Fig. 4 is the circuit diagram of the current sampling circuit of the power battery managing and control system of the preferred embodiment of the present invention；
Fig. 5 is the circuit diagram of the temperature sampling circuit of the power battery managing and control system of the preferred embodiment of the present invention；
Fig. 6 is the circuit diagram of the two-way isolation DC/DC of the power battery managing and control system of the preferred embodiment of the present invention；
Fig. 7 is the circuit diagram of the CAN isolation transceiver module of the power battery managing and control system of the preferred embodiment of the present invention；
Fig. 8 is the circuit diagram of the total voltage acquisition module of the power battery managing and control system of the preferred embodiment of the present invention；
Fig. 9 is the circuit diagram of the total current acquisition module of the power battery managing and control system of the preferred embodiment of the present invention；
Figure 10 is the circuit diagram of the data memory module of the power battery managing and control system of the preferred embodiment of the present invention.
Specific embodiment
The embodiment of the invention will now be described in detail with reference to the accompanying drawings, and as part of this specification passes through
Embodiment illustrates the principle of the present invention, and other aspects of the present invention, feature and its advantage will become by the detailed description
It is very clear.In the attached drawing of institute's reference, the same or similar component is indicated using identical drawing reference numeral in different figures.
As Figure 1-10 shows, power battery managing and control system of the invention uses two-step evolution structure, i.e. central control unit
(CMCU) and local control unit (LSCU), specific hardware structure is as shown in Figure 1.Each battery pack connects a local control
Unit processed, all local control units all pass through CAN bus and central control unit communication.Each local control unit is responsible for
Signal acquisition, state estimation and the battery balanced function of one group of battery work independently between modules.Central control unit is negative
It blames the voltage and current acquisition of integral battery packet, charge and discharge control, battery protection, collect each local control unit information, data
Processing and storage, real-time display function.
Local control unit is integrated with the functions such as the signal acquisition, state estimation and balanced management of battery, is entire hardware
The important component of platform.Each local control unit is mainly by power supply, sampling module, balance module and control module group
At.Fig. 2 is the basic structure block diagram of local control unit, and collected information is transmitted to control module by sampling module, controls mould
Block estimated battery state needs control balance module when equilibrium to work, and control protection electric circuit works when necessary.It connects
Get off will be described in detail each section physical circuit.In hardware platform designed by the present invention, every group of battery all can be right therewith
Answer a local control unit, it is mutually indepedent between these units, take electricity to supply after proper transformation from the both ends of this battery pack
Local control unit uses, and each local control unit is required to a power module.
Power module all takes electricity from battery pack, and the 12V power supply that balance module needs 12V and two-way to be isolated, other modules are also
5V, -5V, 3.3V power supply are needed, multilevel structure is shared.Hardware platform designed by the present invention, every group of balancing battery quantity are most
It is 14 pieces, total voltage is about 37.8~58.8V, it is contemplated that some safety allowances, therefore the LM5017 of TI company is selected to form drop
Volt circuit drops to 12V from assembled battery total voltage, while exporting two-way isolation 12V voltage.LM5017 is a synchronous drop of TI company
Voltage-stablizer is pressed, 7.5V~100V is inputted, exports electric current up to 600mA, and be internally integrated high-pressure side and low-side switch, very
It is suitble to the demand of power supply of the present invention.In order to export the 12V voltage of isolation, it is also added into the transformer that no-load voltage ratio is 1:1:1:1:1:1
Export isolation voltage+12VF1 and+12VF2.
The sampling module of each local control unit includes that 14 road voltage sampling circuits, current sampling circuit and temperature are adopted
Collector.The monomer voltage of every piece of battery selects TI company INA148 differential operational amplifier by battery between 2.7~4.2V
End voltage be converted to voltage over the ground.INA148 be TI company release high-precision, low-power consumption, unit gain differential amplification
Device, the reachable ± 200V of common mode input.After INA148 is converted, single battery end voltage is converted to voltage-to-ground by 1:1,
Output voltage reaches as high as 4.2V at this time, cannot be sent directly into the ADC of controller, also needs by once amplifying, by highest electricity
Pressure is limited within 3.3V.Therefore, amplified using LMV358 General operational amplifier as the second level.LMV358 is one that TI company releases
Money general-purpose operation amplifier suitably adds resistance composition ratio amplifying circuit as shown in figure 3,0.75 times of input voltage amplification is defeated
Out, such output voltage is just limited between 2.02~3.15V.Then LMV358 output is connected to the included ADC of controller
In, it can realize and monomer battery voltage is sampled.
The present invention devises current sampling circuit and is used to acquire euqalizing current, and specific practice is to be added in balanced major loop
Then the sampling resistor of 10m Ω will be sent into ADC using differential operational amplifier after the amplification of sampling resistor both end voltage.Fig. 4 institute
It is shown as the AD sample circuit being made of ADS1115, ADS1115 is 16 analog-digital converters that TI company releases, single-ended by four
Input, is internally integrated I2C communication interface.Here the output end of LT1999-20 is attached directly to ADS1115 analog input end, turned
It is communicated by I2C interface with controller after changing, realizes the sampling to electric current.
Temperature sampling circuit is as shown in figure 5, temperature sampling circuit is adopted using NTC-10K thermistor as temperature sensor
Set battery temperature causes resistance to change when the temperature is changed and then causes voltage change.The voltage being made of LMV358 with
Voltage value is sent into the analog input end of ADS1115 in real time with device, realizes and thermistor both end voltage is sampled, and then calculate
Temperature value out.
Balance module of the invention is the improvement based on two-way switch transformer method, and balance module is divided into two parts, often
A part includes a switch arrays and a two-way isolation DC/DC.Switch of the invention selects prestige scholar semiconductor
SI7938DP.SI7938DP is double N-channel MOS TET that prestige scholar's semiconductor is released, here by " back-to-back " connection of two MOSFET
It uses.Driving chip uses the EMB1428 chip of TI company, and EMB1428 chip is the MOSFET driving chip that TI company releases,
Monolithic can at most drive 12 MOSFET, be internally integrated SPI communication interface, can receive and order from controller, and will switch
The state of driving feeds back to controller.In Fig. 6, one piece of EMB1428 chip drives, 12 MOSFET, wherein 8 are opened for battery
It closes, is responsible for gating battery, four additional is that polarity switch is responsible for guaranteeing the positive and negative anodes of battery plus-negative plate and two-way DC/DC phase always
Even.Fig. 6 is the circuit diagram of one of them two-way DC/DC, and two-way DC/DC is by power management chip EMB1499 and three outsides
The two-way forward converter of active clamp of MOSFET composition.EMB1499 is the bidirectional current DC/DC controller that TI company releases,
Three MOSFET gate electrode drive signals can be provided and constitute forward conversion, it is outer to control that further, it would be desirable to provide an active clamp signals
Portion mosfet driver EMB1412 drives clamper MOSFET, realizes the magnetic reset of forward conversion.
Local control unit requires a controller each of designed by the present invention, and local control unit is in entire battery
Largely exist in management system, analyzed from the structure and function of local control unit, control module type selecting needs to consider following several
A aspect:
(1) peripheral resources.Control module will control the modules in local control unit, need to have multi-channel A/D C, two
The peripheral resources such as road DAC, two SPI communication interfaces, an I2C communication interface, a CAN interface.
(2) operational capability.Control module in local control unit needs to estimate according to collected information the SOC of battery
Etc. states, need to carry out battery using balance policy appropriate according to information such as the SOC of battery balanced, it is therefore necessary to have
Stronger operational capability.
(3) cost and size.Each local control unit requires a control module, then in entire battery management system
In can have multiple control modules, therefore the cost of control module must be considered carefully.In addition to this, local control unit and electricity
Pond is connected directly and quantity is more, and the space for leaving circuit board for is limited, it is therefore necessary to select size smaller, the less device of pin
Part.
In summary factor, control module of the final choice using STM32F103RCT6 as local control unit.
STM32F103RCT6 is 32 8-digit microcontrollers based on ARM that STMicw Electronics releases, and 64 pins, dominant frequency is up to 72M, in piece
With 48K SRAM, 256K FLASH, 3 SPI, 5 serial ports, 2 I2C, 1 CAN, 1 USB, 12,3 tunnel ADC, 2 tunnels 12
Position DAC, 51 universal I/O ports, On-Chip peripheral resource very abundant are very suitable for controlling.
The present invention use distributed management mode, between local control unit and central control unit by CAN bus come
Realize communication, transceiver module TD501MCAN is isolated using the single channel high-speed CAN of golden rising Yang in the present invention, major function be by
TTL/COMS level translation is the differential level of CAN bus, while realizing signal isolation.TD501MCAN is that volume is minimum in the industry
CAN bus transceiver module, be internally integrated isolated power supply, CAN transceiver, signal isolation circuit and protection circuit, meet
ISO11898-2 standard, for baud rate up to 1Mbps, circuit diagram is as shown in Figure 7.
Central control unit is responsible for monitoring entire battery state, and communicates with local control unit understand each electricity in real time
Pond group situation.Central control unit mainly stores mould by master controller, total voltage acquisition module, total current acquisition module, data
Block, communication module, display module composition.Central control unit function is complicated, existing signal acquisition task, to entire battery pack shape
State is monitored and estimates, communicates again with multiple local control units, store historical data, while also wanting real-time display part
Content.Therefore, the controller that Selecting operation ability is strong, peripheral resources are abundant, scalability is strong is most important.In local control before
It selects STM32F103RCT6 as controller in unit processed, in order to develop on the whole conveniently, also selects STM32 series here
STM32F767IGT6 chip is as master controller.STM32F767IGT6 is a high-performance microcontroller that STMicw Electronics releases
Device is based on ARM Cortex-M7 kernel, is the upgrade version of STM32F103RCT6.STM32F767IGT6 uses six level production lines,
Be internally integrated JPEG coding decoder, double-precision hardware floating point calculating unit (DPFPU) and DSP instruction, and included instruction and
Data Cache.
Total voltage acquisition module is former based on magnetic compensation using the voltage sensor LV25-P, LV25-P of U.S. LEM company
The closed loop voltage converter of reason is electrically isolated between primary side circuit (high pressure) and secondary loop (low pressure), thus realization pair
The voltage detecting of high-tension circuit.For LV25-P always there are five pin, two of them are primary side side, are connected in measured voltage two sides respectively；
The other three is in secondary side, and two of them meet power supply (+12~+15V) respectively, another is as measurement end.Primary side side volume
Constant current is 10mA, and secondary side rated current is 25mA, and secondary side and primary side side are converted than KN as 2500:1000.Fig. 8 is
The pictorial diagram and total voltage sample circuit figure of LV25-P.In primary side side, in order to limit input current, it is necessary to seal in a current limliting electricity
Resistance, resistance value are determined by following formula:
Wherein, Rp is current-limiting resistance, and Vp is maximum input voltage, and taking 500V, IPN here is primary side side rated current, RM
For the internal resistance of primary side side, 100 Ω are taken here, it can thus be concluded that Rp=49.9K Ω.
Secondary side electric current Is can be obtained than KN into 2500:1000 by being converted according to secondary side and primary side side are as follows:
According to formula (1) and (2) it is found that secondary side current range is 0~25mA, connecing resistance value in secondary side current output terminal is
The sampling resistor of 0.2 Ω, then sampling resistor both end voltage range is 0~5mV, and difference amplifier LT1999-20 is recycled to be put
It is sent into after big 20 times in the ADC of master controller, can realize the sampling to battery total voltage.
Total current acquisition module uses the current sensor CSNF661 of U.S. Honeywell.Honeywell's
CSNF661 is the closed-loop current sensors based on Hall effect, principle are as follows: uses electric current in Hall element detection primary circuit
Generated primary side magnetic field, generates secondary current after suitably amplifying, and secondary current again passes through oppositely wound secondary coil
Secondary side magnetic field is generated, behind primary side magnetic field and secondary side magnetic field relative equilibrium, secondary current is directly proportional to primary current, and ratio is
Former and deputy side turn ratio is reciprocal.The input rated current of CSNF661 is 100A, and up to 150A, export rated current is peak value
100mA (when input is 100A), secondary side and primary side turn ratio KN are 1:1000, and pictorial diagram and circuit diagram are as shown in Figure 9.
The relationship of the output of secondary side the electric current Is and primary side input current Ip of CSN F661 are as follows:
Is=Ip*N/1000 (3)
Wherein, N is the number of turns that conducting wire is wound in primary side side.The value range of measurement of output end resistance is the Ω of 30 Ω~80,
Here 50 Ω of median is taken, therefore measuring resistance both end voltage range is 0~5V, the ratio formed by General operational amplifier LMV358
Amplifier is amplified 0.6 times, then output voltage range becomes 0~3V, is re-fed into master controller ADC, can be realized to electricity
The measurement of pond total current.
Data memory module uses the NAND FLASH chip MT29F4G08 of U.S. Micron company.NAND FLASH is deposited
The concept of storage is to propose that read or write speed was fast, and capacity is big, is very suitable for a large amount of numbers in 1989 by Toshiba Corp earliest
According to storage, the present invention is also based on this and selects NAND FLASH as memory.MT29F4G08 amount of capacity is 512M word
Section is accessed using 8 parallel-by-bits, and access speed is quickly.The chip is hung on the FMC interface of STM32F767IGT6, and Read-write Catrol is all
It is very convenient.Figure 10 is the circuit diagram of MT29F4G08 chip, and Micro USB interface can be used to connect computer as slave
(SLAVE) it uses, USB flash disk can also be connected by circumscribed USB OTG line and used, facilitate the data copy of storage to other ground
Side.
The power battery managing and control system that above-described embodiment discloses uses distributed frame, comprising central control unit and
Multiple local control units, are established communication by CAN bus between them, devise the overall plan of system, tied using principal and subordinate
Structure, i.e. a central control unit and multiple local control units, local control unit be responsible for the voltage of single group battery, electric current,
Acquisition, single battery SOC estimation and the equalization function of the signals such as temperature, central control unit are responsible for the letter such as global voltage, electric current
Number acquisition and system integrally control, therebetween by CAN bus communication.The present invention may be implemented to all single batteries
The accurate estimation of SOC and the efficient active equalization based on battery SOC, equalizing circuit structure is simple, and cost is relatively low, may be implemented double
To charge and discharge balancing, euqalizing current has good balancing speed up to 3-5A.Equalizing circuit of the invention has good equal
Weigh effect, can be by the difference equilibrium of different battery SOCs within 1%, and power battery managing and control system of the invention is for entire electricity
The safe and stable and efficient operation of cell system has great significance.
The above is a preferred embodiment of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, it is noted that for those skilled in the art, without departing from the principle of the present invention, may be used also
To make several improvement and variation, these, which improve and change, is also considered as protection scope of the present invention.
Claims (7)
1. a kind of power battery managing and control system, including battery pack, the local control unit being electrically connected with the battery pack, Yi Jitong
Cross the central control unit of CAN bus and the local control unit communication connection；
The local control unit is used for signal acquisition, state estimation and the balanced management of each group of battery；
The central control unit is for the voltage and current acquisition of integral battery group, charge and discharge control, battery protection, collection institute
State local control unit information, data processing and storage and real-time display.
2. power battery managing and control system as described in claim 1, it is characterised in that: it is described local control unit include:
Control module is used for estimated battery state, and control balance module when equilibrium is needed to work；
Sampling module is connected with the controller, for the information sampled to be transmitted to the controller；
Balance module is connected with the controller；
Power module is connected with the controller, sampling module and balance module respectively and to controller, sampling module and balanced
Module is powered.
3. power battery managing and control system as claimed in claim 2, it is characterised in that: the sampling module includes:
Voltage sampling circuit, the difference including the model INA148 for the end voltage of monoblock battery to be converted to voltage over the ground
Divide amplifier, the model for the voltage for passing through the difference amplifier output of the model INA148 to be depressured
The operational amplifier of LMV358；
Current sampling circuit, for acquiring the euqalizing current of battery；
Temperature collection circuit, using model NTC-10K thermistor as temperature sensor, for acquiring the temperature of battery.
4. power battery managing and control system as claimed in claim 2, it is characterised in that: the control module uses model
32 8-digit microcontrollers of STM32F103RCT6.
5. power battery managing and control system as described in claim 1, it is characterised in that: the balance module include switch arrays and
Two-way isolation DC/DC, wherein switch arrays are using the driving chip of model EMB1428 and double N ditches of model SI7938DP
Road MOSTET；Two-way isolation DC/DC is made of active the power management chip of model EMB1499 and three external MOSFET
The two-way forward converter of clamper.
6. power battery managing and control system as described in claim 1, it is characterised in that: the central control unit includes main control
Device, the total voltage acquisition module being electrically connected respectively with the master controller, total current acquisition module, data memory module, communication
Module and display module；
The master controller is the circuit for including model STM32F767IGT6 chip；
The total voltage acquisition module uses the voltage sensor of model LV25-P；
The total current acquisition module uses the current sensor of model CSNF661；
The data memory module is the circuit for including model MT29F4G08 chip.
7. power battery managing and control system as described in claim 1, it is characterised in that: the CAN bus is using CAN isolation transmitting-receiving
Module realizes signal isolation for being the differential level of CAN bus by TTL/COMS level translation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810822968.0A CN109066838A (en) | 2018-07-25 | 2018-07-25 | A kind of power battery managing and control system |
Applications Claiming Priority (1)
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| CN112986849A (en) * | 2021-02-05 | 2021-06-18 | 合肥国轩高科动力能源有限公司 | Portable battery simulator based on isolated power supply |
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