CN209400678U

CN209400678U - A kind of battery management system

Info

Publication number: CN209400678U
Application number: CN201822031654.7U
Authority: CN
Inventors: 周光兵; 林美爱
Original assignee: Shanghai Yixin Electronic Technology Co Ltd
Current assignee: Shanghai Yixin Electronic Technology Co Ltd
Priority date: 2018-12-05
Filing date: 2018-12-05
Publication date: 2019-09-17
Anticipated expiration: 2028-12-05

Abstract

The utility model discloses a kind of battery management systems.The battery management system includes: higher-pressure region and low-pressure area；Higher-pressure region is provided with data acquisition unit, and low-pressure area is provided with data processing unit；It further include isolated area, isolated area is between higher-pressure region and low-pressure area；Isolated area includes data transmission unit；Data acquisition unit is used to acquire the current data of battery pack；Data transmission unit is used for the present data transmission of the collected battery pack of data acquisition unit to data processing unit；The current data of the data processing unit battery pack of transmission unit transmission for receiving data, and judge according to current data the state of battery pack.Technical solution provided by the utility model can simplify battery management system, reduce the occupied space of battery management system, reduce the difficulty of hardware and software development in battery management system, shorten the development cycle, and reduce cost.

Description

A kind of battery management system

Technical field

The utility model embodiment be related to Vehicular dynamic battery system management system technical field more particularly to a kind of electricity Pond management system.

Background technique

Lithium battery is increasingly extensive in applications such as low-speed vehicle, fork truck, street-cleaning vehicle, storage carrying vehicles as power, this Battery core quantity in battery pack used in class special vehicle is less for passenger car, commercial vehicle, and voltage usually exists 100V hereinafter, but based on security considerations, still need to monitoring charging and discharging lithium battery process, carry out battery energy management.

Currently, battery management system, in a distributed manner based on (including main module and from module), what it is for single battery packet is System, needs more installation spaces.Also, common battery management system is that the high-low pressure of main module is both needed to independent centre Reason unit carry out information processing after interconnection is isolated again, and also needed from module separate central processing unit progress information processing after again every From interconnection, the application of multiple central processing unit increases hardware and software development difficulty, and the development cycle is long, framework complexity and cost It is high.

Utility model content

The utility model provides a kind of battery management system, to simplify battery management system, reduces battery management system institute The space occupied reduces the difficulty of hardware and software development in battery management system, shortens the development cycle, and reduce cost.

The utility model embodiment provides a kind of battery management system, which includes: higher-pressure region and low pressure Area；

The higher-pressure region is provided with data acquisition unit, and the low-pressure area is provided with data processing unit；

It further include isolated area, the isolated area is between the higher-pressure region and the low-pressure area；The isolated area includes Data transmission unit；

The data acquisition unit is used to acquire the current data of battery pack；

The data transmission unit is used to pass the current data of the collected battery pack of the data acquisition unit Transport to the data processing unit；

The data processing unit is used to receive the current data of the battery pack of the data transmission unit transmission, and The state of the battery pack is judged according to the current data.

Further, the data acquisition unit includes multiple battery core monomer voltage acquisition subelements, the battery core monomer Voltage acquisition subelement is used to acquire the voltage of the battery core monomer in the battery pack；

It is communicated by the way of daisy chain between each battery core monomer voltage acquisition subelement.

Further, the multiple battery core monomer voltage acquisition subelement includes that the first battery core monomer voltage acquisition is single Member；

The data acquisition unit further includes battery pack stagnation pressure acquisition subelement, battery core total voltage acquisition subelement, insulation Monitor subelement；

The output end of the battery pack stagnation pressure acquisition subelement, the output end of battery core total voltage acquisition subelement and institute The output end for stating insulating monitoring subelement is electrically connected with the first battery core monomer voltage acquisition subelement respectively；

The battery pack stagnation pressure acquisition subelement is used to acquire the total voltage of the battery pack, the battery core total voltage acquisition For subelement for acquiring battery core total voltage, the insulating monitoring subelement is used to monitor the outer of the battery pack and the battery pack Insulation resistance between shell, the first battery core monomer voltage acquisition subelement are also used to the battery pack stagnation pressure acquiring son single The analog signal of first, the described battery core total voltage acquisition subelement and the insulating monitoring subelement is converted to digital signal, and passes Transport to the data transmission unit.

Further, the data acquisition unit further includes real-time clock subelement；

The receiving end of the real-time clock subelement is electrically connected with the feeder ear of the first battery core monomer voltage acquisition subelement；

The real-time clock subelement is used to acquire the real time clock information of the battery pack, the first battery core monomer electricity Pressure acquisition subelement is also used to as real-time clock subelement power supply.

Further, the data transmission unit includes the first transmission subelement and the second transmission subelement；

First transmission subelement is used for the first battery core monomer voltage acquisition subelement and the data processing Data between unit are transmitted；Second transmission subelement is used for at the real-time clock subelement and the data Data between reason unit are transmitted.

Further, first transmission subelement includes the first Magnetic isolation circuit, and second transmission subelement includes Second Magnetic isolation circuit；

The first Magnetic isolation circuit is used for the first battery core monomer voltage acquisition subelement and the data processing Data between unit are transmitted, and the second Magnetic isolation circuit is used for at the real-time clock subelement and the data Data between reason unit are transmitted.

Further, the multiple battery core monomer voltage acquisition subelement further includes that the second battery core monomer voltage acquisition is single Member and third battery core monomer voltage acquire subelement；

Between third battery core monomer voltage acquisition subelement and the second battery core monomer voltage acquisition subelement into Row bidirectional data transfers, the second battery core monomer voltage acquisition subelement and the first battery core monomer voltage acquire subelement Between carry out bidirectional data transfers, is carried out between the first battery core monomer voltage acquisition subelement and the data processing unit Bidirectional data transfers.

Further, the data acquisition unit includes the first communication subelement and the second communication subelement；

The first communication subelement is used for third battery core monomer voltage acquisition subelement and second battery core Data between monomer voltage acquisition subelement are transmitted；

The second communication subelement is used for the second battery core monomer voltage acquisition subelement and first battery core Data between monomer voltage acquisition subelement are transmitted.

Further, the first communication subelement includes third Magnetic isolation circuit, and the second communication subelement includes 4th Magnetic isolation circuit；

The third Magnetic isolation circuit is used for third battery core monomer voltage acquisition subelement and second battery core Data between monomer voltage acquisition subelement are transmitted；

The 4th Magnetic isolation circuit is used for the second battery core monomer voltage acquisition subelement and first battery core Data between monomer voltage acquisition subelement are transmitted.

Further, the data acquisition unit further includes battery core temperature acquisition subelement；

The output end of the battery core temperature acquisition subelement respectively with the second battery core monomer voltage acquire subelement with And third battery core monomer voltage acquisition subelement electrical connection；

The battery core temperature acquisition subelement is used to acquire the temperature of the battery core in the battery pack；The second battery core list Bulk voltage acquisition subelement and third battery core monomer voltage acquisition subelement are used to the battery core temperature acquisition subelement Analog signal is converted to digital signal, and is transmitted to the first battery core monomer voltage acquisition subelement.

Further, the battery core total voltage acquisition subelement includes first choice circuit；The higher-pressure region further include with The first high voltage interface, the second high voltage interface and the third high voltage interface of the first choice circuit electrical connection；

First high voltage interface is also electrically connected with an input terminal of the first battery core monomer voltage acquisition subelement, institute It states the second high voltage interface to be also electrically connected with an input terminal of the second battery core monomer voltage acquisition subelement, the third high pressure Interface is also electrically connected with an input terminal of third battery core monomer voltage acquisition subelement, the output of the first choice circuit It holds and is electrically connected with an analog-to-digital conversion interface of the first battery core monomer voltage acquisition subelement；

The first choice circuit is used for according to first high voltage interface, second high voltage interface and the third Voltage output battery core total voltage and characterization voltage on high voltage interface；

The first battery core monomer voltage acquisition subelement is also used to the analog signal of the first choice circuit output Digital signal is converted to, and is transmitted to the data transmission unit.

Further, the insulating monitoring subelement includes the second selection circuit, and the higher-pressure region further includes voltage conversion Circuit；

First high voltage interface, second high voltage interface and the third high voltage interface are selected with described second respectively The input terminal of circuit is electrically connected；The output end of second selection circuit is electrically connected with the data processing unit, and described second The control terminal of selection circuit with low pressure is electrically connected by first switch；

The high-voltage end of the voltage conversion circuit with high pressure is electrically connected, and the low-pressure end of the voltage conversion circuit passes through the Two switches are electrically connected with the low pressure, the output end of the voltage conversion circuit and the first battery core monomer voltage acquisition One analog-to-digital conversion interface of unit is electrically connected；

The control terminal of the first switch is electrically connected with the control port of the data processing unit, the second switch Control terminal is electrically connected with the control port of the first battery core monomer voltage acquisition subelement；

Second selection circuit is used to acquire the shell and the electricity of the battery pack in first switch closure The battery core of Chi Bao always just between leakage current, the first battery core monomer voltage acquisition subelement is also used in the second switch Leakage current between the battery core of the shell and the battery pack that acquire the battery pack when closure is always negative.

Further, the higher-pressure region further includes N number of 4th high voltage interface and N articles of battery core monomer voltage acquisition branch； I-th the 4th high voltage interface acquires branch and the corresponding battery core monomer electricity by i-th article of battery core monomer voltage Pressure acquisition subelement electrical connection；

The battery core monomer voltage acquisition branch includes the first sampling resistor and the second sampling resistor, the first sampling electricity The first end of resistance is electrically connected with the first end of second sampling resistor, and the position of the electrical connection is intermediate point, and described the The second end of one sampling resistor is electrically connected with the 4th high voltage interface, the second end and the battery core of second sampling resistor Monomer voltage acquires subelement electrical connection；

Between battery core monomer voltage acquisition branch described in i-th battery core monomer voltage acquisition branch and i+1 item also It is provided with third switch and equalizing resistance, one end of the equalizing resistance is electrically connected with one end that the third switchs, it is described equal The other end of weighing apparatus resistance is electrically connected with i-th of the 4th high voltage interface, and the other end and i+1 of the third switch are described Intermediate point electrical connection, the control terminal of the third switch are controlled with the signal of the corresponding battery core monomer voltage acquisition subelement End electrical connection；Wherein, N >=1 and N are positive integer；1≤i≤N-1 and i are positive integer；

The battery core monomer voltage acquisition subelement is also used to control the folding condition of third switch, and opens in the third It closes and obtains the first equalizing voltage when closing, obtain the second equalizing voltage when the third is switched and opened；The data processing list Member is used for first equalizing voltage and second equalizing voltage, judges whether the third switch is breaking or short-circuit, And judge whether the battery core monomer voltage acquisition branch is breaking.

Further, the low-pressure area further includes communication converting unit；

The communication converting unit is for being electrically connected the data processing unit and the data transmission unit, the communication Converting unit is used to that the data processing unit will to be transmitted to after data conversion that the data transmission unit transmits.

Battery management system provided by the embodiment of the utility model includes higher-pressure region and low-pressure area；Higher-pressure region is provided with data Acquisition unit, low-pressure area are provided with data processing unit；It further include isolated area, isolated area is between higher-pressure region and low-pressure area； Isolated area includes data transmission unit；Data acquisition unit is used to acquire the current data of battery pack；Data transmission unit is used for By the present data transmission of the collected battery pack of data acquisition unit to data processing unit；Data processing unit is for receiving The current data of the battery pack of data transmission unit transmission, and judge according to current data the state of battery pack.It as a result, can be in height Pressure area only carries out data acquisition, and collected data are sent to the data processing of low-pressure area by the data transmission unit of isolated area Unit, data processing unit are handled data the state to judge battery pack, so as to simplify battery management system, are reduced The occupied space of battery management system reduces the difficulty of hardware and software development in battery management system, shortens the development cycle, and Reduce cost.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of battery management system provided by the embodiment of the utility model；

Fig. 2 is the structural schematic diagram of another battery management system provided by the embodiment of the utility model；

Fig. 3 is one of battery management system provided by the embodiment of the utility model battery core total voltage Acquisition Circuit framework Structural schematic diagram；

Fig. 4 is the structure of one of battery management system provided by the embodiment of the utility model insulating monitoring circuit framework Schematic diagram；

Fig. 5 is the structural representation of one of battery management system provided by the embodiment of the utility model equalizing circuit framework Figure；

Fig. 6 is a kind of application scenarios schematic diagram of battery management system provided by the embodiment of the utility model；

Fig. 7 is a kind of flow diagram of battery management method provided by the embodiment of the utility model；

Fig. 8 is the flow diagram of another battery management method provided by the embodiment of the utility model.

Specific embodiment

The utility model is described in further detail with reference to the accompanying drawings and examples.It is understood that herein Described specific embodiment is used only for explaining the utility model, rather than the restriction to the utility model.It further needs exist for It is bright, part relevant to the utility model is illustrated only for ease of description, in attached drawing rather than entire infrastructure.

Fig. 1 is a kind of structural schematic diagram of battery management system provided by the embodiment of the utility model.Referring to Fig.1, the electricity Pond management system 00 includes: higher-pressure region 10QZ and low-pressure area 20QZ；Higher-pressure region 10QZ is provided with data acquisition unit 10, low-pressure area 20QZ is provided with data processing unit 20；It further include isolated area 30QZ, isolated area 30QZ is located at higher-pressure region 10QZ and low-pressure area Between 20QZ；Isolated area 30QZ includes data transmission unit 30；Data acquisition unit 10 is used to acquire the current data of battery pack； Data transmission unit 30 is used for the present data transmission of the collected battery pack of data acquisition unit 10 to data processing unit 20；The current data of the battery pack that transmission unit 30 transmits for receiving data of data processing unit 20, and according to current data Judge the state of battery pack.

Wherein, it is (exemplary to be integrated in same circuit board by higher-pressure region 10QZ, low-pressure area 20QZ and isolated area 30QZ , which can be printed circuit board) in, structure is simple, reduces the occupied sky in automobiles of battery management system 00 Between, meanwhile, reduce communication between plates, so that the interference between reducing signal, enhances the standard of the judging result of battery pack state True property；Secondly, the data acquisition unit 10 in the 10QZ of higher-pressure region is only used for being acquired the current data of battery pack, low-pressure area Data processing unit 20 in 20QZ is used to receive the current data of battery pack and judges the state of battery pack, and isolation is separately provided Data transmission unit 30 in area 30QZ, isolated area 30QZ is used for the current number of the collected battery pack of data acquisition unit 10 According to data processing unit 20 is transmitted to, as a result, in the battery management system 00, each sectoring function is clear, soft or hard so as to reduce The difficulty of part exploitation, shortens the development cycle of battery management system 00.

Wherein, isolated area 30QZ has the creepage distance for meeting safety requirements.Those skilled in the art are it is understood that here " safety requirements " can refer to the applicable any one or several Electrical Safety standards in this field, and the utility model embodiment is no longer detailed to this It states and is also not construed as limiting.

Illustratively, higher-pressure region 10QZ is electrically connected with the battery core in battery pack.The collected battery of data acquisition unit 10 The current data of packet may include battery core monomer voltage, battery pack total voltage, battery core total voltage, insulating monitoring leakage current, battery core temperature Degree and skilled person will appreciate that other direct or indirect data for characterizing battery pack states.The group of data acquisition unit 10 At being described below.

Illustratively, the data transfer mode of the data transmission unit 30 of isolated area 30QZ can be optical coupling communication, magnetic coupling Close communication or skilled person will appreciate that other coupling communication modes, the utility model embodiment is not construed as limiting this.

Illustratively, the state of the interpretable battery pack of data processing unit 20 of low-pressure area 20QZ includes the temperature of battery pack Degree whether be suitable for, for example whether there is a problem of that battery core temperature is excessively high or battery core temperature is too low；The shell of battery pack and battery pack Between insulation degree；Whether the voltage of battery core monomer is balanced (this partial content is described below)；Certainly, it may also include this The status information of other battery packs known to the technical staff of field, the utility model embodiment are not construed as limiting this.

It should be noted that merely exemplary in Fig. 1, to show higher-pressure region 10QZ, low-pressure area 20QZ and isolated area 30QZ equal For the rectangle of rule, but not to the limit of each region division in battery management system 00 provided by the embodiment of the utility model It is fixed.It in other embodiments, can division (including shape) according to the actual demand of battery management system 11, to each region It is designed, the utility model embodiment is not construed as limiting this.

Optionally, Fig. 2 is the structural schematic diagram of another battery management system provided by the embodiment of the utility model.Reference Fig. 2, data acquisition unit 10 include that multiple battery core monomer voltages acquire subelement 101, and battery core monomer voltage acquires subelement 101 for acquiring the voltage of the battery core monomer in battery pack；Chrysanthemum is used between each battery core monomer voltage acquisition subelement 101 The mode of chain is communicated.

Wherein, it is communicated, can be made each by the way of daisy chain between each battery core monomer voltage acquisition subelement 101 Battery core monomer voltage acquisition subelement 101 is only electrically connected with one or two other battery core monomer voltage acquisition subelement 101, and It not will form fully connected topology, so as to simplify the communicating circuit design between battery core monomer voltage acquisition subelement 101, into And the circuit design of data acquisition unit 10 can be simplified, namely be conducive to simplify the circuit design of higher-pressure region 10QZ.

It should be noted that the quantity for showing battery core monomer voltage acquisition subelement 101 merely exemplary in Fig. 2 is 3 It is a, but the restriction not to battery management system 00 provided by the embodiment of the utility model.It in other embodiments, can basis The actual demand of battery management system 00, setting battery core monomer voltage acquires the quantity of subelement 101, specifically, battery core monomer The quantity of voltage acquisition subelement 101 can be configured according to the battery core quantity of battery pack, and particular number can be one or more； Also, the quantity of each battery core monomer voltage acquisition collectable battery core monomer of subelement 101 can also be according to battery management system The demand of system 00 is configured and (is detailed below), and the utility model embodiment is not construed as limiting this.

Optionally, with continued reference to Fig. 2, multiple battery core monomer voltage acquisition subelements 101 include the first battery core monomer voltage Acquire subelement 1011；Data acquisition unit 10 further includes battery pack stagnation pressure acquisition subelement 102, battery core total voltage acquisition son list First 103, insulating monitoring subelement 104；Battery pack stagnation pressure acquires the output end of subelement 102, battery core total voltage acquires subelement 103 output end and the output end of insulating monitoring subelement 104 acquire 1011 electricity of subelement with the first battery core monomer voltage respectively Connection；Battery pack stagnation pressure acquisition subelement 102 is used to acquire the total voltage of battery pack, and battery core total voltage acquires subelement 103 and uses In acquisition battery core total voltage, insulating monitoring subelement 104 is used to monitor the insulation resistance between battery pack and the shell of battery pack, First battery core monomer voltage acquisition subelement 1011 is also used to acquiring battery pack stagnation pressure into subelement 102, the acquisition of battery core total voltage The analog signal of subelement 103 and insulating monitoring subelement 104 is converted to digital signal, and is transmitted to data transmission unit 20.

Wherein, the first battery core monomer voltage acquisition subelement 1011 includes analog-to-digital conversion interface, battery pack stagnation pressure acquisition Output end, the output end of battery core total voltage acquisition subelement 103 and the output end point of insulating monitoring subelement 104 of unit 102 It is not electrically connected with an analog-to-digital conversion interface of the first battery core monomer voltage acquisition subelement 1011, to realize above-mentioned analog signal To the conversion of digital signal, that is, between the total voltage, battery core total voltage and battery pack and the shell of battery pack for realizing battery pack Insulation resistance sampling process.Data transmission unit 20 is for adopting the first battery core monomer voltage in data acquisition unit 10 Collect digital data transmission that subelement 101 exports to data processing unit 30.

Illustratively, acquiring the collected battery core monomer voltage of subelement 101 according to battery core monomer voltage can be obtained battery core The sum of the sum of monomer voltage and mould group voltage (mould group voltage is the supply voltage that battery core monomer voltage acquires subelement 101), will The sum of the sum of the battery core monomer voltage and mould group voltage, if three matches, can confirm battery pack compared with battery core total voltage Wiring, acquisition 101 wiring of subelement of battery core monomer voltage and circuit, the wiring of battery core total voltage acquisition subelement 103, mould group electricity The wiring of pressure is without exception.If thrin mismatches or three mismatches, it is judged as battery pack wiring, battery core monomer 101 wiring of voltage acquisition subelement and circuit, the wiring of battery core total voltage acquisition subelement 103, in the wiring of mould group voltage One or more exist abnormal.

Illustratively, it may also include power execution unit in battery pack.If the total voltage of battery core total voltage and battery pack with And the state matching of power execution unit, then it can confirm that the wiring of battery core total voltage acquisition subelement 103, battery pack total voltage are adopted The wiring, acquisition 101 wiring of subelement of battery core monomer voltage and the wiring of circuit and power execution unit for collecting subelement 102 are equal For exception.If thrin mismatch or three mismatch, be judged as battery core total voltage acquisition subelement 103 wiring, Wiring, acquisition 101 wiring of subelement of battery core monomer voltage and the circuit and power of battery pack total voltage acquisition subelement 102 are held There is exception in one or more in the wiring of row component.Meanwhile in monitoring strategies, battery core monomer voltage acquires subelement 101 communicating interrupts, communication are lost or the state of miscommunication, by the corresponding alarm grade of policy definition and alarm.

It should be noted that the deterministic process in upper two sections of texts, that is, be related to the process of data processing by low-pressure area The data processing unit 20 of 20QZ is completed.Meanwhile data processing unit 20 may include parameter storage unit 26, parameter storage is single Member 26 includes parameter configuration.The requirement of above-mentioned " matching " is the threshold value set in parameter configuration, if in threshold range, Match；If exceeding threshold range, mismatch.

Illustratively, parameter storage unit 26 may include band electric erazable programmable read-write memory (Electrica-lly Erasable Programmable read only memory, EEPROM), or skilled person will appreciate that other classes The element with store function of type, the utility model embodiment are not construed as limiting this.

Optionally, with continued reference to Fig. 2, data acquisition unit 10 further includes real-time clock subelement 105；Real-time clock is single The receiving end of member 105 is electrically connected with the feeder ear of the first battery core monomer voltage acquisition subelement 1011；Real-time clock subelement 105 for acquiring the real time clock information of battery pack, and the first battery core monomer voltage acquisition subelement 1011 is also used to when being real-time Clock subelement 105 is powered.

Wherein, the first battery core monomer voltage acquisition subelement 1011 can be taken electricity by battery core total voltage, and when being converted to real-time After the available power supply of clock sub-circuit 105, power for real-time clock sub-circuit 105.

Illustratively, in control strategy, retain a real-time clock before lower electricity, read real time clock information after powering on, point Not compared with the data stored in parameter storage unit 26, for strategy processing, thus can be improved battery relational system 00 can By property.Hereinafter it is illustrated by taking relay control and Diagnostic Strategy as an example.

Illustratively, after relay disconnects, battery pack total voltage acquires the total voltage that subelement 102 monitors battery pack, number Judge according to processing unit 20: if the total voltage of battery pack is lower than the first given threshold, (illustrative, which can be When normal work, the total voltage of battery pack 60% or 40%), then it is assumed that relay normally disconnects, and circuit is without exception；Otherwise, Think relay adhesion and alarms.Correlated condition is recorded in parameter storage unit 26, and it is single to power on rear battery pack total voltage acquisition Member 102 monitors the total voltage of battery pack again, and data processing unit 20 judges: if the total voltage of battery pack is higher than the second setting threshold Value (it is illustrative, when which can be to work normally, the total voltage of battery pack 20% or 30%), then it is assumed that after Electric appliance adhesion is simultaneously alarmed；Otherwise, alarm is eliminated, and normally executes power control strategies.

It should be noted that the first given threshold and the second given threshold are not limited to the tool of above-mentioned example shown Body numerical value can be also arranged according to the actual demand of battery management system 00, and the utility model embodiment is not construed as limiting this.In real time Clock subelement 105 can also take electricity by battery core total voltage, via powering after other power-switching circuits in circuit board；Alternatively, real Shi Shizhong subelement 105 also can be used skilled person will appreciate that other modes power supply, the utility model embodiment is to this It is not construed as limiting.

Optionally, with continued reference to Fig. 2, data transmission unit 30 includes that the first transmission subelement 301 and the second transmission are single Member 302；First transmission subelement 301 be used for the first battery core monomer voltage acquisition subelement 101 and data processing unit 20 it Between data transmitted；Second transmission subelement 302 is used between real-time clock subelement 105 and data processing unit 20 Data transmitted.

Illustratively, the data between the first battery core monomer voltage acquisition subelement 101 and data processing unit 20 are transmitted It may include that data processing unit 20 issues data acquisition command, such as the acquisition of battery pack total voltage acquisition, battery core total voltage Order, battery core monomer voltage acquisition, insulation resistance acquisition etc., and the first transmission subelement of bronze drum 301 is transmitted to One battery core monomer voltage acquires subelement 101；It and may include that the first battery core monomer voltage acquisition subelement 101 is adopted according to data Collection order, by the relevant data of the collected battery pack of data acquisition unit 10 of higher-pressure region 10QZ, such as total electricity of battery pack The data such as the insulation resistance between pressure, battery core total voltage, battery core monomer voltage, battery pack and battery pack case pass through the first transmission Subelement 301 is transmitted to data processing unit 20.

Illustratively, the data transfer command between real-time clock subelement 105 and data processing unit 20 may include number Real time clock information acquisition is issued according to processing unit 20, and real-time clock is transmitted to by the second transmission subelement 302 Unit 105；It and may include the real time clock information that real-time clock acquisition subelement 105 acquires battery pack, and passed by second Defeated subelement 302 is transmitted to data processing unit 20.

Optionally, with continued reference to Fig. 2, the first transmission subelement 301 includes the first Magnetic isolation circuit, the second transmission subelement 302 include the second Magnetic isolation circuit；First Magnetic isolation circuit is used for the first battery core monomer voltage acquisition subelement 1011 and number It is transmitted according to the data between processing unit 20, the second Magnetic isolation circuit is used for at real-time clock subelement 105 and data Data between reason unit 20 are transmitted.

Illustratively, serial peripheral built in data processing unit 20 (Serial Peripheral Interface, SPI) Interface, the SPI interface are logical with real-time clock subelement 105 and the first battery core monomer voltage acquisition subelement 101 after Magnetic isolation News.

So set, on the one hand there is stronger electromagnetism interference using the first Magnetic isolation circuit and the second Magnetic isolation circuit Ability, the accuracy of the data transmission of data transmission unit 30 can be improved, so that the state for being conducive to improve battery pack is sentenced The accuracy of disconnected result.On the other hand, due to Magnetic isolation circuit (including the first Magnetic isolation circuit and the second Magnetic isolation circuit) Signaling rate is very fast, so as to reduce data transmission unit 30 for data in data acquisition unit 10 and data processing unit It carries out transmitting the time used between 20, to be conducive to the real-time judge to battery pack state, to be advantageously implemented in real time Monitoring.

Optionally, with continued reference to Fig. 2, multiple battery core monomer voltage acquisition subelements 101 further include the second battery core monomer electricity Pressure acquisition subelement 1012 and third battery core monomer voltage acquire subelement 1013；Third battery core monomer voltage acquires subelement 1013 and second carry out bidirectional data transfers between battery core monomer voltage acquisition subelement 1012, the acquisition of the second battery core monomer voltage Bidirectional data transfers, the first battery core monomer are carried out between subelement 1012 and the first battery core monomer voltage acquisition subelement 1011 Bidirectional data transfers are carried out between voltage acquisition subelement 1011 and data processing unit 20.

Illustratively, by taking orientation shown in Figure 2 as an example, the data acquisition command that data processing unit 20 issues is by first Battery core monomer voltage acquisition subelement 1011 is vertically transmitted to the second battery core monomer voltage acquisition subelement from bottom to top 1012, third battery core monomer voltage acquires subelement 1013；Certainly by the battery core monomer voltage acquisition collected data of subelement 101 Upper and lower passback, and it is back to data processing unit 20.

Illustratively, which is applicable to 6 strings -36 string concatenated system of battery core, that is, is applicable to not With string number battery pack system flexible Application.High-voltage connecting mouth region in Fig. 2 may include battery core data acquisition interface, the acquisition of battery core data Interface is electrically connected to battery core monomer voltage acquisition subelement 101；The quantity of battery core data acquisition interface can be according to battery core serial number Mesh configuration, battery core is first grouped accesses battery core monomer voltage acquisition subelement 101 afterwards.

Wherein, each battery core monomer voltage acquisition subelement 101 can acquire 6 strings -12 string battery core data, i.e., minimum acquisition Battery core is transmitted as 6 strings, and can at most acquire battery core string number is 12 strings.Illustratively, when battery core series string number is 6-12 string of string, only Battery core data are acquired using the first battery core monomer voltage acquisition subelement 1011；When battery core series string number is 13-24 string of string, make Subelement 1012 is acquired with the first battery core monomer voltage and the second battery core monomer voltage acquisition subelement 1012 acquires battery core data； When battery core series string number is 25-36 string of string, then subelement 1011, the second battery core monomer are acquired using the first battery core monomer voltage Voltage acquisition subelement 1012 and third battery core monomer voltage acquisition subelement 1013 acquire battery core data.Herein in principle, electric Core string number will be distributed as homogeneously as possible into each battery core monomer voltage acquisition subelement 101.

Illustratively, when battery core series string number is 18 string, 1012 He of subelement is acquired using the first battery core monomer voltage Second battery core monomer voltage acquires subelement 1012 and acquires battery core data, and the first battery core monomer voltage acquires 1012 He of subelement It is respectively 9 strings that second battery core monomer voltage, which acquires the battery core string number that subelement 1012 acquires,；When battery core series string number is 24 string, Subelement 1012 is acquired using the first battery core monomer voltage and the second battery core monomer voltage acquisition subelement 1012 acquires battery core number According to, and the battery core that the first battery core monomer voltage acquisition subelement 1012 and the second battery core monomer voltage acquisition subelement 1012 acquire Number of going here and there is respectively 12 strings；When battery core series string number is 27 string, subelement 1012 and the are acquired using the first battery core monomer voltage Two battery core monomer voltages acquire subelement 1012 and acquire battery core data, and the first battery core monomer voltage acquisition subelement 1012 and the It is respectively 9 strings that two battery core monomer voltages, which acquire the battery core string number that subelement 1012 acquires,.

It should be noted that the exemplary only explanation of specific value of above-mentioned battery core string number, rather than to the utility model The restriction for the battery management system 00 that embodiment provides.It in other embodiments, can also be according to the reality of battery management system 00 Battery core string number is arranged under the premise of meeting above-mentioned basic principle in border demand, and the utility model embodiment is not construed as limiting this. Meanwhile every a string of battery cores may include multiple battery cores in parallel, the utility model embodiment is to the battery core being connected in parallel in a string same Quantity is not construed as limiting.

Optionally, with continued reference to Fig. 2, data acquisition unit 10 further includes battery core temperature acquisition subelement 107；Battery core temperature The output end for acquiring subelement 107 acquires subelement 1012 and third battery core monomer voltage with the second battery core monomer voltage respectively Subelement 1013 is acquired to be electrically connected；Battery core temperature acquisition subelement 107 is used to acquire the temperature of the battery core in battery pack；Second electricity Core monomer voltage acquisition subelement 1012 and third battery core monomer voltage acquisition subelement 1013 are used to battery core temperature acquisition The analog signal of subelement 107 is converted to digital signal, and is transmitted to the first battery core monomer voltage acquisition subelement 1011.

Wherein, the second battery core monomer voltage acquisition subelement 1012 includes analog-to-digital conversion interface, third battery core monomer voltage Acquire subelement 1013 include analog-to-digital conversion interface, the output end of battery core temperature acquisition subelement 107 respectively with the second battery core list Bulk voltage acquires the analog-to-digital conversion interface electrical connection of subelement 1012 and third battery core monomer voltage acquisition subelement 1013, can answer The conversion of analog signal to digital signal is realized with any analog-to-digital conversion interface.Certainly, battery core temperature acquisition subelement 107 The analog-to-digital conversion subelement that can be also separately provided with one in circuit board of output end be electrically connected, when the second battery core monomer voltage is adopted When collection subelement 1012 and third battery core monomer voltage acquisition subelement 1013 do not work, it can be turned by the modulus that this is separately provided The analog-to-digital conversion that subelement realizes the temperature of battery core is changed, and is transmitted to the first battery core monomer voltage acquisition subelement 1011.

Illustratively, the data acquisition command that data processing unit 20 issues may also include the instruction of battery core temperature acquisition, electricity The data that core monomer voltage acquisition subelement 101 returns may also include the temperature data of battery core.

Optionally, with continued reference to Fig. 2, data acquisition unit 10 includes that the first communication subelement 1061 and the second communication are single Member 1062；First communication subelement 1061 is used to acquire subelement 1013 and the second battery core monomer to third battery core monomer voltage Data between voltage acquisition subelement 1012 are transmitted；Second communication subelement 1062 is used for the second battery core monomer voltage Data between acquisition subelement 1012 and the first battery core monomer voltage acquisition subelement 1011 are transmitted.

Illustratively, the data acquisition command that data processing unit 20 issues acquires subelement by the first battery core monomer voltage 1011 are transmitted to the second battery core monomer voltage acquisition subelement 1012 through the first communication subelement 1061, then by the second battery core list Bulk voltage acquires subelement 1012 and is transmitted to third battery core monomer voltage acquisition subelement 1013 through the second communication subelement 1062. The collected data of subelement 1013 are acquired by third battery core monomer voltage and are back to the second electricity through the second communication subelement 1062 Core monomer voltage acquire subelement 1012, the second battery core monomer voltage acquire subelement 1012 by received return data and by Itself collected data is back to the first battery core monomer voltage acquisition subelement 1011 through the first communication subelement 1061；First Battery core monomer voltage acquires subelement 1011 by received return data and by itself collected data back to data Manage unit 20.

As a result, by the transmitted in both directions of data in single path, data acquisition unit 10 and data processing unit 20 can be simplified Between communicating circuit design, that is, simplify the circuit design of data transmission unit 30, so as to simplify battery management system 00 Design.

Optionally, with continued reference to Fig. 2, the first communication subelement 1061 includes third Magnetic isolation circuit, and the second communication is single Member 1062 includes the 4th Magnetic isolation circuit；Third Magnetic isolation circuit is used to acquire subelement 1013 to third battery core monomer voltage Data between the second battery core monomer voltage acquisition subelement 1012 are transmitted；4th Magnetic isolation circuit is used for the second electricity Data between core monomer voltage acquisition subelement 1012 and the first battery core monomer voltage acquisition subelement 1011 are transmitted.

So set, on the one hand there is stronger electromagnetism interference using third Magnetic isolation circuit and the 4th Magnetic isolation circuit Ability, the accuracy of the data transmission of the first communication subelement 1061 and the second communication subelement 1062 can be improved, to have Conducive to the accuracy of the judging result for the state for improving battery pack.On the other hand, due to Magnetic isolation circuit (including third Magnetic isolation Circuit and the 4th Magnetic isolation circuit) signaling rate it is very fast, so as to reduce the first communication subelement 1061 and second logical Data are carried out transmitting the time used by news subelement 1062 in battery core monomer voltage acquisition subelement 101, to be conducive to To the real-time judge of battery pack state, to be advantageously implemented real-time monitoring.

Optionally, Fig. 3 is the acquisition of one of battery management system provided by the embodiment of the utility model battery core total voltage The structural schematic diagram of circuit framework.In conjunction with Fig. 2 and Fig. 3, it includes first choice circuit that battery core total voltage, which acquires subelement 103, 1081；Higher-pressure region 10QZ further includes the first high voltage interface 1H1, the second high voltage interface being electrically connected with first choice circuit 1081 1H2 and third high voltage interface 1H3；First high voltage interface 1H1 is also defeated with the one of the first battery core monomer voltage acquisition subelement 1011 Entering end electrical connection, the second high voltage interface 1H2 is also electrically connected with an input terminal of the second battery core monomer voltage acquisition subelement 1012, Third high voltage interface 1H3 is also electrically connected with an input terminal of third battery core monomer voltage acquisition subelement 1013, first choice electricity The output end on road 1081 is electrically connected with an analog-to-digital conversion interface of the first battery core monomer voltage acquisition subelement 1011；First choosing Circuit 1081 is selected for according to the voltage on the first high voltage interface 1H1, the second high voltage interface 1H2 and third high voltage interface 1H3 Export battery core total voltage and characterization voltage；First battery core monomer voltage acquisition subelement 1011 is also used to first choice circuit The analog signal of 1081 outputs is converted to digital signal, and is transmitted to data transmission unit 20.

Illustratively, data processing unit 20 generally can be in micro-control unit (Microcontroller Unit, MCU) Central processing unit, wherein micro-control unit is also known as one chip microcomputer or single-chip microcontroller, micro-control unit may include other Component hereinafter illustratively illustrates.

Wherein, the accessible voltage of central processing unit is usually low pressure, and table positive voltage is a low pressure token state, characterizes voltage Corresponding with battery core monomer voltage, i.e., corresponding with the voltage of battery core string, central processing area can be according to characterization voltage and built-in characterization The corresponding relationship of voltage and battery core monomer voltage is back-calculated to obtain battery core monomer voltage.

Illustratively, characterization voltage is 4V, and counter push away can obtain battery core monomer voltage as 8V.This certain exemplary only theory It is bright.It should be noted that battery core monomer voltage can be passed through divider resistance to obtain the above-mentioned characterization voltage in low pressure range It is divided, therefore, characterization voltage is alternatively referred to as the partial pressure of battery core monomer voltage.

Optionally, Fig. 4 is one of battery management system provided by the embodiment of the utility model insulating monitoring circuit frame The structural schematic diagram of structure.In conjunction with Fig. 1 and Fig. 4, insulating monitoring subelement 104 includes the second selection circuit 1082, higher-pressure region 10QZ It further include voltage conversion circuit 109；First high voltage interface 1H1, the second high voltage interface 1H2 and third high voltage interface 1H3 respectively with The input terminal of second selection circuit 1082 is electrically connected；The output end of second selection circuit 1082 is electrically connected with data processing unit 20 It connects, by first switch K1, with low pressure DYD is electrically connected the control terminal of the second selection circuit 1082；Voltage conversion circuit 109 High-voltage end with high pressure (in Fig. 4 illustratively with high pressure interface 1HG with showing high pressure) is electrically connected, voltage conversion circuit 109 Low-pressure end with low pressure DYD is electrically connected by second switch K2, the output end of voltage conversion circuit 109 and the first battery core monomer One analog-to-digital conversion interface of voltage acquisition subelement 1011 is electrically connected；The control terminal and data processing unit 20 of first switch K1 Control port electrical connection, the control terminal of second switch K2 and the first battery core monomer voltage acquisition subelement 1011 control port Electrical connection；It is total that second selection circuit 1082 is used for the shell of acquisition battery pack and the battery core of battery pack in first switch K1 closure Leakage current between just, the first battery core monomer voltage acquisition subelement 1011 are also used to acquire battery when second switch K2 is closed The battery core of the shell of packet and battery pack always bear between leakage current.

Wherein, battery core is always just being the anode of the highest economize on electricity core of voltage after battery core series connection, and battery core is always born as battery core series connection The cathode of the minimum economize on electricity core of voltage afterwards；The shell of battery pack with can be regarded as low pressure DYD.

Illustratively, the insulation of the shell of battery pack is always right against for voltage, detection process can are as follows: data processing unit Universal input/output built in 20 (General Purpose Input Output, GPIO) interface, GPIO interface control the One switch K1 be closed when, can gate voltage always just with low pressure the connection of DYD, this " connection " can be regarded as electric current by third high pressure Interface 1H3 successively passes through the second selection circuit 1082 and first switch K1 with flowing to low pressure DYD.The shell and battery pack of battery pack Battery core always just between leakage current be input to the analog-to-digital conversion of data processing unit 20 after the second selection circuit 1082 and connect Mouthful, the analog-to-digital conversion of leakage current is completed by data processing unit 20.

Illustratively, the insulation of the shell for battery pack is always born for voltage, detection process can are as follows: data processing unit 20 are communicated by the first Magnetic isolation circuit 301, make the GPIO interface control built in the first battery core monomer voltage acquisition subelement 1011 Second switch K2 closure processed, the connection that DYD and battery core are always born with gating low pressure at this time, this " connection " can be regarded as electric current by low pressure Ground DYD successively passes through second switch K2 and voltage conversion circuit 109 with flowing to high pressure interface 1HG.The shell and battery of battery pack Leakage current between the battery core of packet is always negative acquires the another analog-to-digital conversion interface of subelement 1011 by the first battery core monomer voltage Analog-to-digital conversion is completed, is back to data processing unit 20 finally by Magnetic isolation communication.

Data processing unit 20 according in above-mentioned two detection process leakage current, in the second selection circuit 1082 it is built-in Parallel resistance, formula preset in built-in virtual resistance and parameter storage unit 26, calculates in voltage conversion circuit 109 The total face low pressure of battery core DYD insulation resistance, and calculate battery core and always bear to low pressure the insulation resistance of DYD and according to exhausted The size judgement insulation situation of edge resistance.

Illustratively, using the total face low pressure of battery core the insulation resistance of DYD as example, insulation resistance size be 20K Ω/ When 100V -50K Ω/100V, it is believed that battery core always insulate just between the shell of battery pack good；When the size of insulation resistance Lower than 20K Ω/100V, it is believed that battery core always just insulate between the shell of battery pack poor.Certainly, which is only Illustrative explanation, rather than the restriction to battery management system 00 provided by the embodiment of the utility model.In other embodiments In, also the threshold range of insulation resistance, the utility model embodiment pair can be set according to the actual demand of battery management system 00 This is not construed as limiting.

Optionally, Fig. 5 is one of battery management system provided by the embodiment of the utility model equalizing circuit framework Structural schematic diagram.In conjunction with Fig. 1 and Fig. 5, higher-pressure region 10QZ further includes N number of 4th high voltage interface 1H4 and N articles of battery core monomer voltage Acquire branch 1CJ；I-th the 4th high voltage interface 1H4 (i) by i-th article of battery core monomer voltage acquisition branch 1CJ (i) with it is corresponding Battery core monomer voltage acquisition subelement 101 be electrically connected；It includes the first sampling resistor that battery core monomer voltage, which acquires branch 1CJ, 1CJR1 and the second sampling resistor 1CJR2 (illustrative, i-th battery core monomer voltage acquisition branch 1CJ (i) shown in Fig. 5 It may include the second sampling resistor of the first sampling resistor of the channel i and the channel i；I+1 battery core monomer voltage acquires branch 1CJ (i+ 1) may include the second sampling resistor of the first sampling resistor of the channel i+1 and the channel i+1), the first end of the first sampling resistor 1CJR1 It is electrically connected with the first end of the second sampling resistor 1CJR2, the position of the electrical connection is intermediate point 1CJZ, the first sampling resistor The second end of 1CJR1 is electrically connected with the 4th high voltage interface 1H4, the second end and battery core monomer voltage of the second sampling resistor 1CJR2 Subelement 101 is acquired to be electrically connected；I-th battery core monomer voltage acquisition branch 1CJ (i) and i+1 battery core monomer voltage acquire Third switch 1JHK and equalizing resistance 1JHR, one end of equalizing resistance 1JHR and third are additionally provided between branch 1CJ (i+1) One end of switch 1JHK is electrically connected, and the other end of equalizing resistance 1JHR is electrically connected with i-th of the 4th high voltage interface 1H4 (i), the The other end of three switch 1JHK is electrically connected with i+1 intermediate point 1CJZ (i+1), the control terminal of third switch 1JHK with it is corresponding Battery core monomer voltage acquires the signal control terminal electrical connection of subelement 101；Wherein, N >=1 and N are positive integer；1≤i≤N-1 and I is positive integer；Battery core monomer voltage acquisition subelement 101 is also used to control the folding condition of third switch 1JHK, and in third Switch 1JHK obtains the first equalizing voltage when being closed, and obtains the second equalizing voltage when third switch 1JHK is opened；Data processing Unit 20 is used to compare the first equalizing voltage and the second equalizing voltage, judges whether third switch 1JHK is breaking or short-circuit, and Judge whether battery core monomer voltage acquisition branch 1CJ is breaking.

Wherein, " battery core data acquisition interface " above may include N number of 4th high voltage interface 1H4.N number of 4th high-voltage connecting Mouthful 1H4 and N battery core monomer voltage acquisition branch 1CJ connect one to one, battery core monomer voltage acquire branch 1CJ with it is corresponding Battery core monomer voltage acquisition subelement 101 electrical connection can based on above to " battery core monomer voltage acquisition subelement 101 include First battery core monomer voltage acquires subelement 1011, the second battery core monomer voltage acquisition subelement 1012 and Third monomer voltage When acquiring subelement 1013 ", (it is single that first selection which or which battery core monomer voltage acquires son to the distribution principle of battery core string number Member 101 is being distributed as homogeneously as possible) understand, details are not described herein.

Wherein, the current branch where equalizing resistance 1JHR can lead to it (is i.e. opened by intermediate point 1CJZ via third in Fig. 5 Close 1JHK, equalizing resistance 1JHR to the 4th high voltage interface 1H4 branch) leakage current it is larger, i.e. the first sampling resistor 1CJR1 On partial pressure it is larger.If third switch 1JHK is closed, there is pressure drop on the first sampling resistor 1CJR1；Third switch 1JHK is opened When, without pressure drop on the first sampling resistor 1CJR1；That is the second equalizing voltage is then judging equalizing circuit just less than the first equalizing voltage Often, i.e. there is no there is no open circuits in circuit break and short circuit and battery core monomer voltage acquisition branch 1CJ by third switch 1JHK；It is no Then, can determine whether to exist in wiring and the equalizing circuit in battery pack there are at one or place is abnormal third switch 1JHK it is breaking or There is breaking at least one situation in open circuit or battery core monomer voltage acquisition branch 1CJ.

It should be noted that " the second equalizing voltage is less than the first equalizing voltage " here can be regarded as the second equalizing voltage Difference between the first equalizing voltage is less than preset threshold.

It optionally, further include communication converting unit 21 with continued reference to Fig. 2, low-pressure area 20QZ；Communication converting unit 21 is used for It is electrically connected 20 yuan of data processing list and data transmission unit 30, communication converting unit 21 is used to transmit data transmission unit 30 Data processing unit 20 is transmitted to after data conversion.

Illustratively, in conjunction with above, built in data processing unit when SPI interface, communication converting unit 21 can communicate for SPI Converting unit.

Illustratively, with continued reference to Fig. 2, low-pressure area may also include that power conversion unit 22, low voltage communication unit 23, mould Quasi-/digital IO unit 24 and dynamic Control driving unit 25；Wherein, the input terminal and low pressure of power conversion unit 22 One power supply interface of interface area is electrically connected, and output end is electrically connected with data processing unit 20 and parameter storage unit 26 respectively, low The first end of pressure communication unit 23 is electrically connected with a communication interface in low-voltage interface area, analog/digital input-output unit 24 First end is electrically connected with an input/output interface in low-voltage interface area, the first end and low-voltage interface of dynamic Control driving unit 25 The one dynamic Control interface in area is electrically connected；The second of the second end of low voltage communication unit 23, analog/digital input-output unit 24 It holds, the second end of dynamic Control driving unit 25 is electrically connected with a control terminal of data processing unit 20 respectively.

Illustratively, power conversion unit 22 is used to be converted to high-voltage electricity low tension, and gives 20 He of data processing unit Parameter storage unit 26 is powered.Wherein, " high-voltage electricity is converted into low tension " can for by the voltage of 24V be converted to 5V, 3.3V, The utilization voltage of composition component in 1.8V, 1.5V or other single-chip microcontrollers, or can for by the voltage of 12V be converted to 5V, The utilization voltage of 3.3V, 1.8V, 1.5V or the composition component in other single-chip microcontrollers, the setting about low pressure can be according in single-chip microcontroller Composition component utilization voltage setting, the utility model embodiment is not construed as limiting this.

Illustratively, analog/digital input-output unit 24 is mainly realized with 20 configuration mode of data processing unit and is exported Direction selection, cooperation amplifying circuit do small current driving, such as the wake-up signal of indicator light driving, other external equipments；May be used also To be configured to analog-to-digital conversion input detection, such as detection of additional environment temperature.

Illustratively, Fig. 6 is a kind of application scenarios schematic diagram of battery management system provided by the embodiment of the utility model. Referring to Fig. 6, battery pack 40 may include battery management system 00, and battery core string 401, the power being electrically connected with battery management system 00 are held Row component 402 and charging/discharging apparatus 50.In conjunction with Fig. 2 and Fig. 6, control terminal and the dynamic Control driving of power execution unit 402 are single Member 25 is electrically connected, and the control terminal of charging/discharging apparatus 50 is electrically connected with low voltage communication unit 23, and the first of power execution unit 402 End is electrically connected with the positive of battery core string 401, and second end is electrically connected with the first end of charging/discharging apparatus 50, and the of charging/discharging apparatus 50 Two ends are electrically connected with the cathode of battery core string 401.Illustratively, power execution unit 402 can be a switch, when the switch is closed, Battery core string 401 is used to power for charging/discharging apparatus 50, and battery management system 00 is used to monitor the state of battery pack 40.In conjunction with Fig. 2 And Fig. 6, whether dynamic Control driving unit 25 is used to control the work of power execution unit 402, low voltage communication unit 23 is used for Data transmission between data processing unit 20 and charging/discharging apparatus 50.

It should be noted that merely exemplary in above-mentioned Fig. 2-Fig. 6 have electrical connection with straight line or broken line connection Component units or subelement merely to clearly and simply showing connection relationship, and not implement offer to the utility model The restriction of the application scenarios of battery management system 00 and battery management system 00.It in other embodiments, can be according to battery The spatial relation of each component units and subelement, and the practical shape of setting line is arranged in the actual demand of management system 00 State, the utility model embodiment are not construed as limiting this.

Conceived based on same utility model, the utility model embodiment also provides a kind of battery management method, the cell tube The battery management system that reason method can be provided using above embodiment executes, and therefore, which also has above-mentioned Beneficial effect possessed by the battery management system that embodiment provides, non-explained in details place can refer to understanding above, herein It repeats no more.Illustratively, Fig. 7 is a kind of flow diagram of battery management method provided by the embodiment of the utility model.Ginseng According to Fig. 7, which includes:

S61, higher-pressure region data acquisition unit acquisition battery pack current data.

Illustratively, Fig. 1 and Fig. 2 be can refer to, current data includes the total voltage of battery pack, battery core total voltage, battery core list Bulk voltage, battery pack shell and battery pack between insulation resistance, battery core temperature and real time clock information.The step can manage Solution is that the current data of above-mentioned battery pack is obtained by each subelement in data acquisition unit 10, and specific acquisition modes can be ability One or more modes, the utility model embodiment known to field technique personnel are not construed as limiting this.

S62, isolated area data transmission unit by the present data transmission of the collected battery pack of data acquisition unit extremely Data processing unit.

Illustratively, it can refer to Fig. 2, the data transmission unit 30 of isolated area 30QZ includes the first Magnetic isolation circuit and second The current data of above-mentioned battery pack is rapidly and accurately transmitted to data processing in such a way that Magnetic isolation communicates by Magnetic isolation circuit Unit.

The current data of the battery pack of the data processing unit reception data transmission unit transmission of S63, low-pressure area, and according to Current data judges the state of battery pack.

The state of battery pack include battery pack temperature whether be suitable for, for example whether there are battery core temperature is excessively high or battery core temperature Spend low problem；Insulation degree between battery pack and the shell of battery pack；Whether the voltage of battery core monomer is balanced；On and It is shown in text or skilled person will appreciate that other battery packs state, the utility model embodiment is not construed as limiting this.

Wherein, isolated area is between higher-pressure region and low-pressure area.

Illustratively, referring to Fig.1 or Fig. 2, higher-pressure region 10QZ, low-pressure area 20QZ and isolated area 30QZ be integrated in it is same In block circuit board (illustrative, which can be printed circuit board), structure is simple, reduces battery management system 00 and exists Occupied space in vehicle, meanwhile, reduce communication between plates, so that the interference between reducing signal, enhances battery bag-like The accuracy of the judging result of state；Secondly, the data acquisition unit 10 in the 10QZ of higher-pressure region is only used for the current number to battery pack According to being acquired, the data processing unit 20 in low-pressure area 20QZ is used to receive the current data of battery pack and judges battery pack Isolated area 30QZ is separately provided in state, and the data transmission unit 30 in isolated area 30QZ is for acquiring data acquisition unit 10 The present data transmission of the battery pack arrived is to data processing unit 20, and as a result, in the battery management system 00, each sectoring function is bright Really, so as to reduce the difficulty of hardware and software development, shorten the development cycle of battery management system 00.

Optionally, Fig. 8 is the flow diagram of another battery management method provided by the embodiment of the utility model, reference Fig. 5 and Fig. 8, battery management method may also include that

S71, third close the switch, and battery core monomer voltage acquires the voltage for the battery core monomer that subelement obtains in battery pack, It is recorded as the first equalizing voltage.

S72, third switch are opened, and battery core monomer voltage acquires the voltage for the battery core monomer that subelement obtains in battery pack, It is recorded as the second equalizing voltage.

First equalizing voltage and the second equalizing voltage are transmitted to data processing unit by S73, data transmission unit.

S74, data processing unit compare the first equalizing voltage and the second equalizing voltage, judge third switch whether open circuit or Short circuit, and judge whether battery core monomer voltage acquisition branch is breaking.

Above-mentioned S71-S74 shows the battery core balanced way in battery management method, and concrete principle and process can refer to Explanation of the text to Fig. 5, details are not described herein

Note that above are only the preferred embodiment and institute's application technology principle of the utility model.Those skilled in the art's meeting Understand, the utility model is not limited to specific embodiment described here, is able to carry out for a person skilled in the art various bright Aobvious variation, readjustment, any combination and substitution is without departing from the protection scope of the utility model.Therefore, although passing through Above embodiments are described in further detail the utility model, but the utility model is not limited only to the above implementation Example can also include more other equivalent embodiments in the case where not departing from the utility model design, and the utility model Range is determined by the scope of the appended claims.

Claims

1. a kind of battery management system characterized by comprising higher-pressure region and low-pressure area；

The data transmission unit is used for the present data transmission of the collected battery pack of the data acquisition unit extremely The data processing unit；

The current data of the battery pack of the data processing unit for receiving the data transmission unit transmission, and according to The current data judges the state of the battery pack.

2. battery management system according to claim 1, which is characterized in that the data acquisition unit includes multiple battery cores Monomer voltage acquires subelement, and the battery core monomer voltage acquisition subelement is used to acquire the battery core monomer in the battery pack Voltage；

3. battery management system according to claim 2, which is characterized in that the multiple battery core monomer voltage acquisition is single Member includes that the first battery core monomer voltage acquires subelement；

The data acquisition unit further includes battery pack stagnation pressure acquisition subelement, battery core total voltage acquisition subelement, insulating monitoring Subelement；

The output end of battery pack stagnation pressure acquisition subelement, the output end of battery core total voltage acquisition subelement and it is described absolutely The output end of edge monitoring subelement is electrically connected with the first battery core monomer voltage acquisition subelement respectively；

The battery pack stagnation pressure acquisition subelement is used to acquire the total voltage of the battery pack, and battery core total voltage acquisition is single Member for acquiring battery core total voltage, the insulating monitoring subelement be used to monitor the battery pack and the battery pack shell it Between insulation resistance, the first battery core monomer voltage acquisition subelement be also used to acquire the battery pack stagnation pressure subelement, The analog signal of the battery core total voltage acquisition subelement and the insulating monitoring subelement is converted to digital signal, and is transmitted to The data transmission unit.

4. battery management system according to claim 3, which is characterized in that when the data acquisition unit further includes real-time Clock subelement；

The real-time clock subelement is used to acquire the real time clock information of the battery pack, and the first battery core monomer voltage is adopted Collection subelement is also used to as real-time clock subelement power supply.

5. battery management system according to claim 4, which is characterized in that the data transmission unit includes the first transmission Subelement and the second transmission subelement；

First transmission subelement is used for the first battery core monomer voltage acquisition subelement and the data processing unit Between data transmitted；Second transmission subelement is used for the real-time clock subelement and the data processing list Data between member are transmitted.

6. battery management system according to claim 5, which is characterized in that first transmission subelement includes the first magnetic Isolation circuit, second transmission subelement include the second Magnetic isolation circuit；

The first Magnetic isolation circuit is used for the first battery core monomer voltage acquisition subelement and the data processing unit Between data transmitted, the second Magnetic isolation circuit be used for the real-time clock subelement and the data processing list Data between member are transmitted.

7. battery management system according to claim 3, which is characterized in that the multiple battery core monomer voltage acquisition is single Member further includes the second battery core monomer voltage acquisition subelement and third battery core monomer voltage acquisition subelement；

It is carried out between the third battery core monomer voltage acquisition subelement and the second battery core monomer voltage acquisition subelement double It is transmitted to data, between the second battery core monomer voltage acquisition subelement and the first battery core monomer voltage acquisition subelement Bidirectional data transfers are carried out, are carried out between the first battery core monomer voltage acquisition subelement and the data processing unit two-way Data transmission.

8. battery management system according to claim 7, which is characterized in that the data acquisition unit includes the first communication Subelement and the second communication subelement；

The first communication subelement is used for third battery core monomer voltage acquisition subelement and the second battery core monomer Data between voltage acquisition subelement are transmitted；

The second communication subelement is used for the second battery core monomer voltage acquisition subelement and the first battery core monomer Data between voltage acquisition subelement are transmitted.

9. battery management system according to claim 8, which is characterized in that the first communication subelement includes third magnetic Isolation circuit, the second communication subelement includes the 4th Magnetic isolation circuit；

The third Magnetic isolation circuit is used for third battery core monomer voltage acquisition subelement and the second battery core monomer Data between voltage acquisition subelement are transmitted；

The 4th Magnetic isolation circuit is used for the second battery core monomer voltage acquisition subelement and the first battery core monomer Data between voltage acquisition subelement are transmitted.

10. battery management system according to claim 7, which is characterized in that the data acquisition unit further includes battery core Temperature acquisition subelement；

The output end of the battery core temperature acquisition subelement acquires subelement and the with the second battery core monomer voltage respectively Three battery core monomer voltages acquire subelement electrical connection；

The battery core temperature acquisition subelement is used to acquire the temperature of the battery core in the battery pack；The second battery core monomer electricity Pressure acquisition subelement and third battery core monomer voltage acquisition subelement are used to the simulation of the battery core temperature acquisition subelement Signal is converted to digital signal, and is transmitted to the first battery core monomer voltage acquisition subelement.

11. battery management system according to claim 7, which is characterized in that the battery core total voltage acquires subelement packet Include first choice circuit；The higher-pressure region further includes the first high voltage interface being electrically connected with the first choice circuit, second high Crimp mouth and third high voltage interface；

First high voltage interface is also electrically connected with an input terminal of the first battery core monomer voltage acquisition subelement, and described the Two high voltage interfaces are also electrically connected with an input terminal of the second battery core monomer voltage acquisition subelement, the third high voltage interface Also with the third battery core monomer voltage acquisition subelement an input terminal be electrically connected, the output end of the first choice circuit and The analog-to-digital conversion interface electrical connection of the first battery core monomer voltage acquisition subelement；

The first choice circuit is used for according to first high voltage interface, second high voltage interface and the third high pressure Voltage output battery core total voltage and characterization voltage on interface；

The first battery core monomer voltage acquisition subelement is also used to convert the analog signal of the first choice circuit output For digital signal, and it is transmitted to the data transmission unit.

12. battery management system according to claim 11, which is characterized in that the insulating monitoring subelement includes second Selection circuit, the higher-pressure region further include voltage conversion circuit；

First high voltage interface, second high voltage interface and the third high voltage interface respectively with second selection circuit Input terminal electrical connection；The output end of second selection circuit is electrically connected with the data processing unit, second selection The control terminal of circuit with low pressure is electrically connected by first switch；

The high-voltage end of the voltage conversion circuit with high pressure is electrically connected, and the low-pressure end of the voltage conversion circuit is opened by second Pass is electrically connected with the low pressure, and the output end of the voltage conversion circuit and the first battery core monomer voltage acquire subelement An analog-to-digital conversion interface electrical connection；

The control terminal of the first switch is electrically connected with the control port of the data processing unit, the control of the second switch It holds and is electrically connected with the control port of the first battery core monomer voltage acquisition subelement；

Second selection circuit be used for the first switch closure when acquire the battery pack shell and the battery pack Battery core always just between leakage current, the first battery core monomer voltage acquisition subelement is also used to be closed in the second switch When acquire the battery pack shell and the battery pack battery core always bear between leakage current.

13. battery management system according to claim 2, which is characterized in that the higher-pressure region further includes N number of 4th high pressure Interface and N battery core monomer voltage acquire branch；I-th of the 4th high voltage interface passes through i-th article of battery core monomer electricity Pressure acquisition branch is electrically connected with the corresponding battery core monomer voltage acquisition subelement；

The battery core monomer voltage acquisition branch includes the first sampling resistor and the second sampling resistor, first sampling resistor First end is electrically connected with the first end of second sampling resistor, and the position of the electrical connection is intermediate point, and described first adopts The second end of sample resistance is electrically connected with the 4th high voltage interface, the second end of second sampling resistor and the battery core monomer The electrical connection of voltage acquisition subelement；

It is also set up between battery core monomer voltage acquisition branch described in i-th battery core monomer voltage acquisition branch and i+1 item There are third switch and equalizing resistance, one end of the equalizing resistance to be electrically connected with one end that the third switchs, the balanced electricity The other end of resistance is electrically connected with i-th of the 4th high voltage interface, the other end of the third switch and the i+1 centre Point electrical connection, the signal control terminal electricity of the control terminal of the third switch and the corresponding battery core monomer voltage acquisition subelement Connection；Wherein, N >=1 and N are positive integer；1≤i≤N-1 and i are positive integer；

The battery core monomer voltage acquisition subelement is also used to control the folding condition of third switch, and closes in third switch The first equalizing voltage is obtained when conjunction, obtains the second equalizing voltage when the third is switched and opened；The data processing unit is used In first equalizing voltage and second equalizing voltage, judge whether the third switch is breaking or short-circuit, and Judge whether the battery core monomer voltage acquisition branch is breaking.

14. battery management system according to claim 2, which is characterized in that the low-pressure area further includes that communication conversion is single Member；

The communication converting unit is for being electrically connected the data processing unit and the data transmission unit, the communication conversion Unit is used to that the data processing unit will to be transmitted to after data conversion that the data transmission unit transmits.