CN103915862B - A kind of cell managing device and battery management chip - Google Patents
A kind of cell managing device and battery management chip Download PDFInfo
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- CN103915862B CN103915862B CN201210591764.3A CN201210591764A CN103915862B CN 103915862 B CN103915862 B CN 103915862B CN 201210591764 A CN201210591764 A CN 201210591764A CN 103915862 B CN103915862 B CN 103915862B
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Abstract
The present invention proposes a kind of cell managing device, including：Multiple discharge modules, multiple acquisition modules and battery management chip.Wherein, each discharge module is in parallel with a cell in battery pack, and the cell in battery pack is discharged by corresponding discharge module；Each acquisition module is connected with a cell in battery pack, and acquisition module is used to gather the battery parameter of cell；Battery management chip includes multiplexing module and kernel control module, multiplexing module is connected with the multiple discharge module and multiple acquisition modules respectively, multiplexing module is used to send battery parameter to kernel control module, and controls corresponding discharge module to open according to the equalization discharge control instruction of kernel control module；Kernel control module is used to generate equalization discharge control instruction according to battery parameter.The present invention reduces the power consumption of system while electric quantity balancing and battery protection is realized.The present invention proposes a kind of battery management chip simultaneously.
Description
Technical field
The present invention relates to technical field of new energy, more particularly to a kind of cell managing device and battery management chip.
Background technology
BMS（Battery Management System, battery management system）It is the important composition portion of new-energy automobile
Point, a good battery management system BMS will at any time monitor charged state such as battery SOC (the State of of whole battery pack
Charge, state-of-charge) value, keep per batteries electric quantity balancings, the overvoltage/undervoltage to battery, excessively stream, excess temperature etc. are comprehensive carries out
Protection, reduction stand-by power consumption, fault self-checking, reliable communication etc..One lithium ion battery is charged to SOC and is 100% or discharges into
SOC value is 0%, it will reduce the long-term charging capacity of battery.The work charged state of usual lithium ion battery is its SOC value
It is limited in a less scope, such as 30% to 70%, and useful battery capacity is only the 40% of whole specified volumes.In order to
Make full use of available battery capacity scope, battery system must extremely accurate monitor the voltage of every batteries, and (voltage is direct
Corresponding to charged state) battery parameter such as electric current estimates the SOC value of battery, allows battery operated in optimal SOC value region.Such as Fig. 1
A more typical lithium ion battery discharge curve, it can be seen that 30% to 70% charged state battery have it is relatively flat
Smooth discharge voltage profile, the requirement to voltage sample is higher.Needed in a high-tension battery group using multi-section lithium ion electricity
Pond, if to keep specific range of charge states, increased great complexity.One Li-ion batteries piles can not be as single
The such charging and discharging of power supply, additionally, due to the otherness of manufacture, the charging capacity of each batteries is slightly different, and this appearance
Amount difference can increase over time, because the poor battery of capacity is faster than other cell degradations.Capacity is slightly smaller than other
The state-of-charge of battery will be gradually deviated from initial value after multiple charging and discharging cycles.If the state-of-charge per batteries
Do not obtain periodically balanced, then some batteries due to overcharging or over-discharge, and will eventually cause to damage, and finally
Battery failure is formed, current battery management system has electric quantity balancing function, make to be kept per batteries electricity in battery pack
The balanced life-span so as to extend whole machine.Existing equalization methods mainly have two kinds：Passive equalization and active equalization.Wherein, it is passive
Equalization methods are, by a battery discharge path, to make for high-voltage battery discharges always before all cell voltages are equal
High-power loss can be produced in this way.And active equalization method includes switching capacity equalization and base based on capacitor
In the voltage balancing method of transformer, this method will not produce larger power attenuation, and high-voltage power supply energy to be diverted
LVPS, enable has measured more sufficiently utilization, but makes to be related to number of electronic components many in this way, into
This height.
In a word, the super-charge super-discharge excess temperature of battery can all cause expendable infringement to it, and battery management system will be made
Fast reaction, timely cut-off current protection system notifies situation at once.
On the other hand, battery pack has a two-part loss in the standby state, a part be from loss, this be battery in itself
What characteristic was determined, in general, capacity is bigger, and bigger from loss, this partition losses BMS can not be reduced.Another part is BMS
The stand-by power consumption of system.Battery power supply system is very high to power consumption requirements, especially in the standby state, at present, most electricity
Pond management circuit all configures low power mode of operation, and such as SLEEP patterns are deep sleep, but once enters SLEEP
Pattern, can only be stimulated and could be waken up by external level signal or current signal, distributed in distributed battery management system
Management system is connected by communication interface with host computer, and host computer controls battery management system to enter or move back by data command
Go out SLEEP patterns, it is very inconvenient.
Prior art has the drawback that：Existing battery management system is mainly supervised to the voltage x current temperature of battery
Survey, protection is made to over-and under-voltage excess-current excess-temperature system, with electric quantity balancing function.However it is necessary that communicated with digital remote combining
Get up application, it has not been convenient to the use of user.In addition, the power managed problem of battery power supply system fails preferably to solve.
The content of the invention
The purpose of the present invention is intended at least solve one of above-mentioned technological deficiency.
Therefore, first purpose of the invention is to propose a kind of cell managing device, the cell managing device is being realized
While battery management system electric quantity balancing, battery protection, power managed is solved the problems, such as.Second object of the present invention is to carry
Go out a kind of battery management chip.
To reach above-mentioned purpose, first aspect present invention embodiment proposes a kind of cell managing device, including：Multiple electric discharge
Module, each described discharge module is in parallel with a cell in battery pack, and the cell in the battery pack passes through
Corresponding discharge module is discharged；A monomer in multiple acquisition modules, each described acquisition module and the battery pack
Battery is connected, and the acquisition module is used to gather the battery parameter of the cell；Battery management chip, the battery management
Chip includes multiplexing module and kernel control module, wherein, the multiplexing module, the multiplexing module difference
Be connected with the multiple discharge module and multiple acquisition module, the multiplexing module for by the battery parameter send to
The kernel control module, and control corresponding discharge module to open according to the equalization discharge control instruction of the kernel control module
Open；And the kernel control module, the kernel control module according to the battery parameter for generating equalization discharge control
Instruction.
Cell managing device according to embodiments of the present invention, can realize that the electricity of battery is equal by multiple discharge modules
Weighing apparatus, it is to avoid the overshoot of battery is put excessively, is protected battery.In addition, can by use battery management chip of the invention
The power consumption of electric power system is reduced, facilitates host computer remote control.
To achieve the above object, second aspect present invention embodiment proposes a kind of battery management chip, including：Including multichannel
Multiplexing module and kernel control module, wherein, the multiplexing module, the multiplexing module is filled with battery management respectively
Multiple discharge modules in putting are connected with multiple acquisition modules, and the multiplexing module is used to adopt the multiple acquisition module
The battery parameter of collection is sent to the kernel control module, and according to the equalization discharge control instruction control of the kernel control module
The corresponding discharge module is made to open；The kernel control module, the kernel control module is used to be joined according to the battery
Number generation equalization discharge control instruction.
Battery management chip according to embodiments of the present invention, electric discharge is sent by kernel control module according to battery parameter
Weighing apparatus control instruction, it is possible to achieve carry out electric quantity balancing to battery, internally nuclear control module can carry out Remote Wake Up in addition, reduces
The power consumption of electric power system.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by practice of the invention.
Brief description of the drawings
The above-mentioned and/or additional aspect of the present invention and advantage will become from the following description of the accompanying drawings of embodiments
Substantially and be readily appreciated that, wherein：
Fig. 1 is a kind of discharge curve of existing lithium ion battery；
Fig. 2 is the structural representation of the cell managing device according to the embodiment of the present invention；
Fig. 3 is the structural representation of the cell managing device according to one embodiment of the present of invention；
Fig. 4 is that the communication process for waking up kernel control module according to the watchdog module of one embodiment of the present of invention is illustrated
Figure；
Fig. 5 is the schematic diagram of the structure of the cell managing device according to an alternative embodiment of the invention；
Fig. 6 is the part-structure schematic diagram of the cell managing device according to one embodiment of the present of invention；
Fig. 7 is the multichannel discharge module internal structure schematic diagram according to one embodiment of the present of invention；
Fig. 8 is the functional relationship schematic diagram of the kernel control module according to one embodiment of the present of invention；And
Fig. 9 is the course of work flow chart of the cell managing device according to one embodiment of the invention.
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from start to finish
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
It is exemplary to scheme the embodiment of description, is only used for explaining the present invention, and is not construed as limiting the claims.
Following disclosure provides many different embodiments or example is used for realizing different structure of the invention.For letter
Change disclosure of the invention, hereinafter the part and setting to specific examples are described.Certainly, they are only merely illustrative, and
Purpose does not lie in the limitation present invention.Additionally, the present invention can in different examples repeat reference numerals and/or letter.It is this heavy
It is again the relation between itself not indicating discussed various embodiments and/or setting for purposes of simplicity and clarity.This
Outward, the invention provides various specific technique and material example, but those of ordinary skill in the art can be appreciated that
The use of the applicable property and/or other materials of other techniques.In addition, fisrt feature described below second feature it
" on " structure can include that the first and second features be formed as the embodiment of directly contact, it is also possible to including other feature shape
Into the embodiment between the first and second features, such first and second feature may not be directly contact.
In the description of the invention, it is necessary to explanation, unless otherwise prescribed and limit, term " installation ", " connected ",
" connection " should be interpreted broadly, for example, it may be mechanically connect or electrical connection, or two connections of element internal, can
Being to be joined directly together, it is also possible to be indirectly connected to by intermediary, for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term.
With reference to following description and accompanying drawing, it will be clear that these and other aspects of embodiments of the invention.In these descriptions
In accompanying drawing, specifically disclose some particular implementations in embodiments of the invention to represent implementation implementation of the invention
Some modes of the principle of example, but it is to be understood that the scope of embodiments of the invention is not limited.Conversely, of the invention
Embodiment includes all changes, modification and the equivalent that fall into the range of the spiritual and intension of attached claims.
A kind of cell managing device according to embodiments of the present invention is described with reference to the accompanying drawings.
As shown in Fig. 2 the cell managing device of the embodiment of the present invention, including：Multiple discharge modules 201, multiple collection moulds
Block 202, battery management chip 203.Wherein, each discharge module in multiple discharge modules 201 and a list in battery pack
Body cell parallel, the cell in battery pack is discharged by corresponding discharge module.It is every in multiple acquisition modules 202
Individual acquisition module is connected with a cell in battery pack, and each acquisition module is used to gather coupled cell
Battery parameter.Battery management chip 203 includes multiplexing module 204 and kernel control module 205.Wherein, multiplex
Module 204 is connected with multiple discharge modules 201 and multiple acquisition modules 202 respectively, and multiplexing module 204 is used to join on battery
Number is sent to kernel control module 205, and controls corresponding electric discharge according to the equalization discharge control instruction of kernel control module 205
Module is opened.Kernel control module 205 is used to generate equalization discharge control instruction according to battery parameter.
In an embodiment of the present invention, the relevant parameter of battery is gathered by multiple acquisition modules 202, by battery management core
The battery parameter of collection is sent to kernel control module 205, kernel control module 205 by the multiplexing module 204 in piece 203
According to the parameter generation equalization discharge instruction for receiving, and multiple electric discharge moulds are sent an instruction to by multiplexing module 204
Block 201, then the cell in battery pack is discharged by corresponding discharge module, until battery charge is balanced.
As shown in figure 3, in one embodiment of the invention, battery management chip 203 also includes watchdog module 301,
Watchdog module 301 is connected with kernel control module 205, and watchdog module 301 is used to be in sleep in kernel control module 205
The control instruction of host computer is received during state, and control instruction is converted into default level signal and default level is believed
Number send to kernel control module 205 waking up kernel control module 205.As shown in figure 4, in one embodiment of the present of invention,
As a example by being communicated with CAN, when electric power system is in holding state, most of modular power source is closed, only keep cell tube
The working power of the kernel control module 205 in reason chip 203, into system depth sleep（SLEEP）, at utmost reduce system
System power consumption.Enter deep sleep in kernel control module 205（SLEEP）Before state, the power supply of CAN communications transceiver also can
Close, that is, say, it is impossible to which AHB is passed through by CAN transceiver（Advanced High performance Bus, system bus）Wake up
Systemic-function.However, it is possible to pass through watchdog module 301 is transformed into a level letter for regulation the control signal of host computer
Number, apply interrupting by the inside nuclear control modules 205 of data/address bus such as AHB, so as to wake up kernel control module 205, seeing
After door dog module 301 wakes up kernel control module 205, controlled to remove kernel control in cell managing device by kernel control module 205
The power supply of the module outside molding block 205.Open the power supply for controlling other modules successively i.e. by kernel control module 205.And
As long as host computer first sends some fixed codes such as FFFF, the length of this fixed code is anti-according to the communication speed of system and system
Answer speed to determine, it is therefore an objective to allow the kernel control module 205 to there is time enough to open the power supply of all modules upon awakening, allow each
Individual module completes to reset, and so ensures that communication data is not lost.Other watchdog module 301, can be with system worked well
Close to reduce power consumption, only enter deep sleep front opening just in system.It should be noted that watchdog module 301
The instruction of host computer is sent to kernel control module 205 so as to remote wakening system by data/address bus, can apply to
Other data communications such as SPI（Serial Peripheral Interface-- Serial Peripheral Interface (SPI)s）Communication, UART
（Universal Asynchronous Receiver/Transmitter, Universal Asynchronous Receive/dispensing device）Communication, I2C
（Inter-Integrated Circuit, twin wire universal serial bus）Communication etc..
Further, in another embodiment of the present invention, battery management chip 203 also includes：Temperature detecting module
501 and hardware protection module 502.Wherein, temperature detecting module 501 is used to detect the temperature of battery.Hardware protection module 502 with
Temperature detecting module 501 is connected, for when the temperature of battery is more than threshold value, being protected to battery.It should be noted that this
The threshold value at place can refer to the higher limit for being suitable to the temperature that battery is operated.Hardware protection module 502 independent operating, it is to avoid because
Digital circuit such as SPI sequential or control sequential break down and cause battery management IC to play to make the protection of battery
With hardware protection module 502 just brings into operation on the circuit of whole battery management chip 203 during electricity, by temperature detecting module
501 detection cell voltage temperature exceed setting range, such as, beyond the maximum of suitable battery operated temperature, just directly send
Alarm signal.In addition, other modules of the part also existed in battery management chip 203 are as shown in Figure 6, it is part mould in figure
Block, and intermodule is part annexation.Including：SUB is the differential discharge circuit of high-performance, voltage temperature signal is carried out pre-
Treatment；12Bit ADC Ctrl and Coulomb ADC Ctrl are to produce high precision reference circuit, are carried to analog circuit a/d respectively
Power supply source；MOS Driver are charge-discharge protection circuit；Electric current pre-amplification circuit；Module LDO5V and LDO21.5v are benchmark
Circuit.OSC12MHZ and OSC210KHZ are OSC（Oscillator, oscillator）Oscillating circuit, for whole digital circuit provides base
Quasi- frequency, vibration frequency is respectively 2MHZ and 10KHZ, is the pulsatile cardiac of whole battery management chip IC circuits；LV POR and
LV LVR are respectively electrification reset circuit and power-off reset circuit；EflashController and SRAM Controller are
FLASH memory and sram memory；CPUCortex M0 are 32BIT digital cores;SPI CAN UART I2C are communication mould
Block.
In one embodiment of the invention, the voltage of the collection of battery management chip 203 battery, electric current, temperature are equivalent next
Estimate the SOC value of battery.So multiple sampling modules 202 can be including voltage sample module, current sample module etc..Such as Fig. 6
Shown, in one embodiment of the invention, analog to digital conversion circuit is sampled for voltage temperature, and the circuit has FIR filter
The Δ ∑ ADC of filtering process circuit, the resolution ratio with 16BIT, by the kernel control module 205 in battery management chip 203
Control.In another embodiment of the present invention, current sample module is made up of an amplifier and an A/D analog-digital converter,
Wherein amplifier is a difference amplifier, and preposition amplification is carried out to current signal.According to SOC algorithms, electric current is integrated, and
Electric current is pulsation in the course of work, current signal first can be converted into digital PWM by current sample module（Pulse
Width Modulation, pulse width modulation）Signal, then pwm signal is counted, can so be sampled with control electric current
Precision.
In one embodiment of the invention, multiplexing module 204 can be for high-pressure multi-path Multiplexing module 204 for example：
High voltage switch circuit, its internal circuit are as shown in fig. 7, often economize on electricity cell voltage all can be by multi-functional MUX（Multiplexer,
Multiplexer）Be loaded into bus, because battery is connected, common-mode voltage is very high, so MUX wants high-pressure process, whole MUX circuit by
Kernel control module 205 is controlled.Additionally include temperature MUX etc..
Further, as shown in fig. 6, in one embodiment of the invention, multiple discharge modules 201 include：Resistance 601
With switch 602.Wherein, one end of resistance 601 is connected with one end of corresponding cell.One end of switch 602 and resistance 601
The other end is connected, and the other end of switch 602 is connected with the other end of corresponding cell, and switch 602 receives battery management chip
203 control.Switch 602 can be triode or MOSFET（Metal-Oxide-Semiconductor Field-
EffectTransistor, metal oxide layer-semiconductor-field-effect transistor）.Multiple discharge modules 201 are put to battery
Electricity, on resistance 601, changing resistance 601 can change discharge current to the power consumption that battery bleeds off.When the resistance of resistance 601 is smaller
When, discharge current is larger, and electric discharge is than very fast, but identical power, the small resistance 601 of resistance can take larger circuit face
Product, and electric discharge can produce substantial amounts of heat soon, need to solve the problems, such as radiating.When the resistance of resistance 601 is larger, discharge current compared with
Small, discharge slow, identical power, and it is small that the big resistance of resistance takes circuit area, and electric discharge is slow, the heat of generation also compared with
It is small.Need to consider the heat produced when equalization efficiency, the occupied area of resistance 601 and equilibrium in side circuit, selection is suitable
Discharge resistance 601.Due to individual difference, in use, there is larger pressure difference to battery in cell voltage, once pressure difference is not setting
In fixed scope, the circuit of multiple discharge modules 201 is switched on, and in setting range, multiple discharge modules 201 are just closed equal-pressure-difference
Close.Once it was found that the voltage difference of battery exceedes setting value, just start multiple circuits of discharge module 201 and voltage balance circuit.Electricity
Pond equilibrium is to utilize electronic technology, the monomer voltage deviation of lithium ion battery is maintained in desired extent, so as to ensure each
Battery is not damaged in normal use, increases battery life.
As shown in figure 8, being the functional schematic of kernel control module 205, kernel control module 205 is by multiplexing mould
Block 204 obtains the parameter of battery, such as voltage sample parameter, current sample parameter, temperature sampling parameter, kernel control module
205 carry out SOC computings according to battery parameter, and export SOC operation results, the SOC value of real-time update battery.Nuclear control in addition
Module 205 generates equalization discharge control instruction according to the SOC results of computing.Wherein, equalization discharge control instruction can be electricity
Balance route is instructed.In other words, kernel control module 205 sends electric quantity balancing control instruction according to the SOC results of computing, control
Multiple discharge modules 201 and equalizing circuit discharge battery, until scope of the battery electric quantity in setting.Kernel control module
205 orders for receiving host computer at any time, change the working condition of oneself and entrance or exit SLEEP patterns, in interior nuclear control
When module 205 is in SLEEP patterns, kernel control module 205 is waken up by watchdog module 301.The basis of kernel control module 205
Failure detection result judges whether failure, in the event of failure then output protection signal, control hardware protection module 502 or
Charge and discharge protecting module is protected to battery.
In an embodiment of the present invention, the course of work of cell managing device is as shown in figure 9, comprise the following steps：
S901, multiple acquisition modules 202 gather the parameters of battery.
The parameters of the Real-time Collection battery of multiple sampling modules 202, for example, gather voltage, electric current, temperature of battery etc.,
And kernel control module 205 is sent to by multiplexing module 204.
S902, kernel control module 205 determines whether to carry out electric quantity balancing according to parameter.
Kernel control module 205 estimates the SOC value of battery pack according to the relevant parameter of the battery for receiving, and judges whether
Electric quantity balancing is carried out to battery and information exchange is carried out with host computer.Wherein, can be built-in algorithms for the calculating of SOC value
Or user oneself exploitation.In one embodiment of invention, the algorithm of SOC has following two：One kind is internal resistance tracing.Tool
Body ground, internal battery SOC algorithms are the program of solidification in kernel control module 205, electricity of the algorithm according to the battery for collecting
Some battery parameters estimation SOC value in pressure, electric current, temperature and pre-existing kernel control module 205, real-time update battery
Dump energy.Another kind is the SOC algorithms with autonomous learning function.Specifically, if necessary to carry out electric quantity balancing to battery,
Then enter step S903, if electric quantity balancing need not be carried out to battery, fault detect, fault detect can be carried out to battery
It is real-time, i.e., into step S904.
S903, electric quantity balancing is carried out to the battery in battery pack.
Kernel control module 205 judges to need to carry out electric quantity balancing to battery according to SOC value, then kernel control module 205
Electric quantity balancing instruction is sent, the multiple discharge modules 201 of control and equalizing circuit are open-minded, battery are discharged and balanced, until
Each battery cell electricity in battery pack reaches electric quantity balancing in the range of setting.
S904, carries out fault diagnosis.
Fault diagnosis, the connection state or electricity of Main Diagnosis battery temperature sensor are carried out to cell managing device in real time
Whether the situation of equal power pipe is good, in the event of failure, then into step S905, is out of order if do not detected, returns
Step S901 carries out judging whether to enter SLEEP patterns.
S905, protection circuit is made a response, and battery is protected.
Detection is broken down, the line open circuit of such as battery temperature sensor, it is impossible to detect the temperature of battery in time, cause
Battery temperature is made a response beyond the number range for specifying, then hardware protection module 502, and battery is protected, or electricity
Equal power pipe is short-circuited, then battery electric quantity may be made unbalance, not in the range of the electricity of setting, then charge-discharge protection circuit
Electric current is turned off, while protection module sends signal to host computer.
S906, judges whether to enter SLEEP patterns.
Battery management chip 203 receives the order of host computer at any time, changes the working condition of oneself and enters or exit
SLEEP patterns, the return to step S901 if fruit chip need not enter SLEEP patterns, if host computer sends battery and powers being
System enters standby, then cell managing device enters SLEEP patterns, then battery management chip 203 and kernel control module 205 are located
In SLEEP patterns.When kernel control module 205 is in SLEEP patterns, can be waken up by watchdog module 301.
Cell managing device according to embodiments of the present invention, by multiple discharge modules and equalizing circuit, it is possible to achieve electricity
The electric quantity balancing in pond, it is to avoid the overshoot of battery is put excessively, is that charge-discharge protection circuit can be to battery by hardware protection module
Protected.In addition, by watchdog module kernel control module can be waken up in deep sleep state, electric power system is reduced
Power consumption, facilitates host computer remote control.Additionally, watchdog module can also be used in combination with other communication buses, it is more practical.
The battery management chip that embodiment is proposed according to the second aspect of the invention is described with reference to the accompanying drawings.
As shown in Fig. 2 the battery management chip of the embodiment of the present invention includes multiplexing module 204 and kernel control module
205.Wherein, multiplexing module 204 respectively with cell managing device in multiple discharge modules 201 and multiple acquisition module
202 are connected, and multiplexing module 204 is used to send the battery parameter that multiple acquisition modules 202 are gathered to kernel control module
205, and control corresponding discharge module to open according to the equalization discharge control instruction of kernel control module 205.Interior nuclear control mould
Block 205 is used to generate equalization discharge control instruction according to battery parameter.
As shown in fig. 6, in one embodiment of the invention, multiplexing module 204 can be multiplexed mould for high-pressure multi-path
Block is for example：High voltage switch circuit, its internal circuit are as shown in fig. 7, often economize on electricity cell voltage all can be by multi-functional MUX
（Multiplexer, multiplexer）It is loaded into bus, because battery is connected, common-mode voltage is very high, so MUX wants high-pressure process,
Whole MUX circuit is controlled by kernel control module 205.Additionally include temperature multiplexer etc..
Kernel control module 205 calculates battery charge state SOC value according to battery parameter, and according to the battery charge shape
State SOC value generates equalization discharge control instruction.Wherein, equalization discharge control instruction can be electric quantity balancing control instruction.
Further, in one embodiment of the invention, battery management chip also includes watchdog module 301, guards the gate
Dog module 301 is connected with kernel control module 205, and watchdog module 301 is used to be in sleep state in kernel control module 205
When receive host computer control instruction, and by control instruction be converted to default level signal and by default level signal hair
Kernel control module 205 is delivered to wake up kernel control module 205.Kernel control module 205 is waken up in watchdog module 301
Afterwards, the power supply of the module in cell managing device in addition to kernel control module 205 is controlled by kernel control module 205.Such as Fig. 4 institutes
Show, in one embodiment of the present of invention, as a example by being communicated with CAN, when electric power system is in holding state, close big portion
Sub-module power supply, only keeps the working power of the kernel control module 205 in battery management chip, into system depth sleep
（SLEEP）, at utmost reduce system power dissipation.Enter deep sleep in kernel control module 205（SLEEP）Before pattern, CAN is total
The power supply of line communications transceiver can also be closed, that is, say, it is impossible to wake up systemic-function by CAN communication bus.However, it is possible to pass through
The control signal of host computer is transformed into a level signal for regulation by watchdog module 301, by data/address bus such as AHB
（Advanced High performance Bus, system bus）Inside nuclear control module 205 applies interrupting, so that in waking up
Nuclear control module 205, the power supply of other modules is opened by kernel control module 205 successively.As long as and host computer first sends
Some fixed codes such as FFFF, the length of this fixed code determines according to the communication speed of system and the reaction speed of system, purpose
It is the power supply for allowing kernel control module 205 there are the time enough all modules of opening upon awakening, allows modules to complete to reset,
So ensure that communication data is not lost.Other watchdog module 301 can be closed to reduce power consumption in normal work, only existed
System enters deep sleep front opening just.It should be noted that the instruction of host computer is passed through number by watchdog module 301
Kernel control module 205 is sent to so as to remote wakening system according to bus, be can apply to and other data communications such as SPI
（Serial Peripheral Interface-- Serial Peripheral Interface (SPI)s）Communication, UART（UniversalAsynchronous
Receiver/Transmitter, Universal Asynchronous Receive/dispensing device）Communication, I2C（Inter-Integrated Circuit,
Twin wire universal serial bus）Communication etc..
Further, shown in reference picture 5, in another embodiment of the present invention, battery management chip also includes：Temperature
Detection module 501 and hardware protection module 502.Wherein, temperature detecting module 501 is used to detect the temperature of battery.Hardware protection
Module 502 is connected with temperature detecting module 501, for when the temperature of battery is more than threshold value, being protected to battery.Need
Bright, threshold value herein can refer to the higher limit for being suitable to the temperature that battery is operated.The independent fortune of hardware protection module 502
OK, it is to avoid factor word circuit such as SPI sequential or control sequential break down and cause the battery management IC can not to play to electricity
The protective effect in pond, hardware protection module 502 just brings into operation on whole battery management chip circuit during electricity, is examined by temperature
Survey the detection cell voltage temperature of module 501 and exceed setting range, the line of such as battery temperature sensor is opened a way, it is impossible to inspection in time
The temperature of battery is surveyed, causes battery temperature beyond the number range of regulation, hardware protection module 502 is just made a response, and is directly sent out
Go out alarm signal, battery is protected.In addition, other modules of the part also existed in battery management chip and part connection are closed
System as shown in Figure 6, including：SUB is the differential discharge circuit of high-performance, and voltage temperature signal is pre-processed；12Bit ADC
Ctrl and Coulomb ADC Ctrl are to produce high precision reference circuit, provide power supply to analog circuit a/d respectively；MOS
Driver is charge-discharge circuit；Electric current pre-amplification circuit；Module LDO5V and LDO21.5v are reference circuits.OSC12MHZ and
OSC210KHZ is OSC（Oscillator, oscillator）Oscillating circuit, for whole digital circuit provides reference frequency, vibration frequency
It is respectively 2MHZ and 10KHZ, is the pulsatile cardiac of whole battery management chip IC circuits；LV POR and LV LVR are respectively upper electricity
Reset circuit and power-off reset circuit；EflashController and SRAM Controller are in FLASH memory and SRAM
Deposit；CPUCortex M0 are 32BIT digital cores;SPI CAN UART I2C are communication module.
The magnitude of voltage of the battery parameter such as battery that in an embodiment of the present invention, will be gathered by multiplexing module 204,
Current value, temperature value are sent to kernel control module 205, and kernel control module 205 estimates the SOC of battery according to battery parameter
Value, sends electric quantity balancing instruction, and battery is discharged according to instruction control discharge module by multiplexing module 204,
Battery electric quantity is set to reach equilibrium.Other kernel control module 205 is additionally operable to receive the order of host computer, with change working condition and
Into or exit SLLEP patterns.When kernel control module 205 is in SLEEP patterns, watchdog module 301 receives host computer
Order, and order be converted into default level signal wake up kernel control module 205, watchdog module 301 in system just
Often closed during work, only opened in SLEEP patterns, so lessen the power consumption of system.When temperature detecting module 501 detects electricity
When the temperature in pond exceedes threshold value, hardware protection module 502 is directly alarmed, and battery is protected.
In sum, battery management chip according to embodiments of the present invention, is realizing carrying out the same of electric quantity balancing to battery
When, Remote Wake Up can be carried out by the internal nuclear control module of watchdog module in holding state, and then open other modules electricity
Source, reduces the power consumption of electric power system, and watchdog module can also be applied to various bus communications, more practical.In addition, hardware
Protection module independent operating, it is to avoid fault can not be protected to battery.
Any process described otherwise above or method description in flow chart or herein is construed as, and expression includes
It is one or more for realizing specific logical function or process the step of the module of code of executable instruction, fragment or portion
Point, and the scope of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discussion suitable
Sequence, including function involved by basis by it is basic simultaneously in the way of or in the opposite order, carry out perform function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
Represent in flow charts or logic and/or step described otherwise above herein, for example, being considered use
In the order list of the executable instruction for realizing logic function, in may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment（As computer based system, including the system of processor or other can be held from instruction
The system of row system, device or equipment instruction fetch and execute instruction）Use, or with reference to these instruction execution systems, device or set
It is standby and use.For the purpose of this specification, " computer-readable medium " can any can be included, store, communicate, propagate or pass
The dress that defeated program is used for instruction execution system, device or equipment or with reference to these instruction execution systems, device or equipment
Put.The more specifically example of computer-readable medium（Non-exhaustive list）Including following：With the electricity that one or more are connected up
Connecting portion（Electronic installation）, portable computer diskette box（Magnetic device）, random access memory（RAM）, read-only storage
（ROM）, erasable edit read-only storage（EPROM or flash memory）, fiber device, and portable optic disk is read-only deposits
Reservoir（CDROM）.In addition, computer-readable medium can even is that the paper that can thereon print described program or other are suitable
Medium, because optical scanner for example can be carried out by paper or other media, then enters edlin, interpretation or if necessary with it
His suitable method is processed electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each several part of the invention can be realized with hardware, software, firmware or combinations thereof.Above-mentioned
In implementation method, the software that multiple steps or method can in memory and by suitable instruction execution system be performed with storage
Or firmware is realized.If for example, realized with hardware, and in another embodiment, can be with well known in the art
Any one of row technology or their combination are realized：With the logic gates for realizing logic function to data-signal
Discrete logic, the application specific integrated circuit with suitable combinational logic gate circuit, programmable gate array（PGA）, scene
Programmable gate array（FPGA）Deng.
Those skilled in the art are appreciated that to realize all or part of step that above-described embodiment method is carried
The rapid hardware that can be by program to instruct correlation is completed, and described program can be stored in a kind of computer-readable storage medium
In matter, the program upon execution, including one or a combination set of the step of embodiment of the method.
Additionally, during each functional unit in each embodiment of the invention can be integrated in a processing module, it is also possible to
It is that unit is individually physically present, it is also possible to which two or more units are integrated in a module.Above-mentioned integrated mould
Block can both be realized in the form of hardware, it would however also be possible to employ the form of software function module is realized.The integrated module is such as
Fruit is to realize in the form of software function module and as independent production marketing or when using, it is also possible to which storage is in a computer
In read/write memory medium.
Storage medium mentioned above can be read-only storage, disk or CD etc..
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or spy that the embodiment or example are described
Point is contained at least one embodiment of the invention or example.In this manual, to the schematic representation of above-mentioned term not
Necessarily refer to identical embodiment or example.And, the specific features of description, structure, material or feature can be any
One or more embodiments or example in combine in an appropriate manner.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding can carry out various changes, modification, replacement to these embodiments without departing from the principles and spirit of the present invention
And modification, the scope of the present invention is by appended claims and its equivalent limits.
Claims (12)
1. a kind of cell managing device, it is characterised in that including：
Multiple discharge modules, each described discharge module is in parallel with a cell in battery pack, in the battery pack
Cell is discharged by corresponding discharge module；
Multiple acquisition modules, each described acquisition module is connected with a cell in the battery pack, the collection mould
Block is used to gather the battery parameter of the cell；
Battery management chip, the battery management chip includes multiplexing module, watchdog module and kernel control module, its
In,
The multiplexing module, the multiplexing module respectively with the multiple discharge module and multiple acquisition module phase
Even, the multiplexing module is used to send the battery parameter to the kernel control module, and according to the kernel control
The equalization discharge control instruction of molding block controls corresponding discharge module to open；And
The kernel control module and the watchdog module, the watchdog module pass through AHB system bus and the kernel
Control module is connected, and the watchdog module is used to be received when the kernel control module is in sleep state the control of host computer
System instruction, and the control instruction is converted into default level signal and the default level signal is sent to described
Kernel control module is waking up the kernel control module；
The kernel control module, after being woken, generates equalization discharge control instruction, and pass through according to the battery parameter
The multiplexing module sends to the multiple discharge module the equalization discharge control instruction, in the watchdog module
After waking up the kernel control module, the watchdog module is closed, and the battery management is controlled by the kernel control module
The power supply of the module in device in addition to the kernel control module.
2. cell managing device as claimed in claim 1, it is characterised in that the kernel control module is joined according to the battery
Number calculates battery charge state SOC value, and generates the equalization discharge control instruction according to the battery charge state SOC value.
3. cell managing device as claimed in claim 2, it is characterised in that the equalization discharge control instruction is electric quantity balancing
Control instruction.
4. cell managing device as claimed in claim 1, it is characterised in that the multiplexing module is high-pressure multi-path multiplexing
Module.
5. cell managing device as claimed in claim 1, it is characterised in that the battery management chip also includes：
Temperature detecting module, the temperature for detecting battery；
Hardware protection module, the hardware protection module is connected with the temperature detecting module, for the temperature in the battery
During more than threshold value, the battery is protected.
6. cell managing device as claimed in claim 1, it is characterised in that the discharge module includes：
Resistance, one end of the resistance is connected with one end of corresponding cell；
Switch, one end of the switch is connected with the other end of the resistance, the other end of the switch and the corresponding monomer
The other end of battery is connected, and the switch is controlled by the battery management chip.
7. cell managing device as claimed in claim 6, it is characterised in that the switch be triode or metal oxide layer-
Semiconductor-field-effect transistor MOSFET.
8. a kind of battery management chip, it is characterised in that including multiplexing module, watchdog module and kernel control module,
Wherein,
The multiplexing module, the multiplexing module respectively with cell managing device in multiple discharge modules and multiple
Acquisition module is connected, and the multiplexing module is used to send the battery parameter that the multiple acquisition module is gathered to described interior
Nuclear control module, and control the corresponding discharge module to open according to the equalization discharge control instruction of the kernel control module
Open；
The watchdog module, is connected by AHB system bus with the kernel control module, and the watchdog module is used for
The kernel control module receives the control instruction of host computer when being in sleep state, and the control instruction is converted to pre-
If level signal and the default level signal is sent to the kernel control module to wake up the interior nuclear control mould
Block；
The kernel control module, after being woken, generates equalization discharge control instruction, described according to the battery parameter
After watchdog module wakes up the kernel control module, the watchdog module is closed, and institute is controlled by the kernel control module
State the power supply of the module in cell managing device in addition to the kernel control module.
9. battery management chip as claimed in claim 8, it is characterised in that the kernel control module is joined according to the battery
Number calculates battery charge state SOC value, and generates the equalization discharge control instruction according to the battery charge state SOC value.
10. battery management chip as claimed in claim 9, it is characterised in that the equalization discharge control instruction is that electricity is equal
Weighing apparatus control instruction.
11. battery management chips as claimed in claim 8, it is characterised in that the multiplexing module is multiplexed for high-pressure multi-path
Module.
12. battery management chips as claimed in claim 8, it is characterised in that the battery management chip also includes：
Temperature detecting module, the temperature for detecting battery；
Hardware protection module, the hardware protection module is connected with the temperature detecting module, for the temperature in the battery
During more than threshold value, the battery is protected.
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| CN201210591764.3A CN103915862B (en) | 2012-12-31 | 2012-12-31 | A kind of cell managing device and battery management chip |
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| CN201210591764.3A CN103915862B (en) | 2012-12-31 | 2012-12-31 | A kind of cell managing device and battery management chip |
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| DE102015002072B4 (en) | 2015-02-18 | 2024-11-07 | Audi Ag | Setting the charge states of battery cells |
| DE102015205725A1 (en) * | 2015-03-30 | 2016-10-06 | Robert Bosch Gmbh | Method for operating a battery unit |
| CN105207296A (en) * | 2015-09-29 | 2015-12-30 | 东风商用车有限公司 | Balanced cooling system of lithium cell |
| CN106872908A (en) * | 2017-04-26 | 2017-06-20 | 安徽优旦科技有限公司 | BMS system exception power down SOC guard methods |
| CN107196388A (en) * | 2017-07-27 | 2017-09-22 | 重庆日拓能源科技有限公司 | Batteries in parallel connection group voltage balance management system, batteries in parallel connection group and its control method |
| CN107728065B (en) * | 2017-08-18 | 2024-06-14 | 欣旺达动力科技股份有限公司 | Battery acquisition device and monitoring method |
| CN110015177B (en) * | 2017-08-31 | 2022-10-18 | 比亚迪股份有限公司 | Battery equalization method, system, vehicle, storage medium and electronic device |
| CN109870650B (en) * | 2017-11-17 | 2021-09-24 | 奥动新能源汽车科技有限公司 | Battery monitoring method and system |
| CN111600353A (en) * | 2017-11-20 | 2020-08-28 | 莱克电气股份有限公司 | Lithium battery protection control ASIC chip system |
| CN108466554B (en) * | 2018-04-21 | 2023-10-24 | 合众新能源汽车股份有限公司 | BMS multifunctional integrated power management circuit |
| CN111819557B (en) * | 2018-07-13 | 2023-08-01 | 深圳市汇顶科技股份有限公司 | Method of monitoring IoT devices and use thereof on IoT device battery protection watchdog |
| TWI678855B (en) * | 2018-10-12 | 2019-12-01 | 宏碁股份有限公司 | A low voltage threshold adjusting method |
| CN111044912B (en) * | 2018-10-12 | 2021-10-01 | 宁德时代新能源科技股份有限公司 | Dormancy monitoring system and method |
| CN109586354A (en) * | 2018-10-23 | 2019-04-05 | 大唐恩智浦半导体有限公司 | Battery management chip, chip controls method and system |
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| KR102780623B1 (en) * | 2019-11-14 | 2025-03-11 | 주식회사 엘지에너지솔루션 | Wireless battery management system, electric vehicle comprising same, and method thereof |
| CN112918326B (en) * | 2020-12-28 | 2023-02-28 | 中国第一汽车股份有限公司 | Battery management system, method, vehicle and medium |
| CN117183818A (en) * | 2022-05-30 | 2023-12-08 | 比亚迪半导体股份有限公司 | Battery management chip, battery system and vehicle |
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| CN116566024B (en) * | 2023-07-11 | 2023-09-29 | 成都利普芯微电子有限公司 | Battery protection system and lithium battery protection chip |
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| JP2004524793A (en) * | 2001-03-30 | 2004-08-12 | デザインライン・リミテッド | Battery management unit, system, and method |
| CN100369347C (en) * | 2003-12-04 | 2008-02-13 | 比亚迪股份有限公司 | Dynamic power supply managment system for electric vehicle |
| CN101192756A (en) * | 2006-12-02 | 2008-06-04 | 比亚迪股份有限公司 | Balance charging and discharging protection circuit of secondary battery and its method |
| CN102723745B (en) * | 2011-03-29 | 2015-06-24 | 比亚迪股份有限公司 | Battery pack management system |
| CN102761148B (en) * | 2011-04-29 | 2015-08-26 | 比亚迪股份有限公司 | A kind of batteries management system |
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