CN108550926A - battery system and electric vehicle - Google Patents

battery system and electric vehicle Download PDF

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Publication number
CN108550926A
CN108550926A CN201810383945.4A CN201810383945A CN108550926A CN 108550926 A CN108550926 A CN 108550926A CN 201810383945 A CN201810383945 A CN 201810383945A CN 108550926 A CN108550926 A CN 108550926A
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CN
China
Prior art keywords
battery
battery modules
electricity
electronic switch
parallel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810383945.4A
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Chinese (zh)
Inventor
何晶
曾祥兵
宋开通
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chery Automobile Co Ltd
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Chery Automobile Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chery Automobile Co Ltd filed Critical Chery Automobile Co Ltd
Priority to CN201810383945.4A priority Critical patent/CN108550926A/en
Publication of CN108550926A publication Critical patent/CN108550926A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4207Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M10/4257Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48Accumulators combined with arrangements for measuring, testing or indicating condition, e.g. level or density of the electrolyte
    • H01M10/482Accumulators combined with arrangements for measuring, testing or indicating condition, e.g. level or density of the electrolyte for several batteries or cells simultaneously or sequentially
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00Batteries for particular applications
    • H01M2220/20Batteries in motive systems, e.g. vehicle, ship, plane
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The disclosure is directed to a kind of battery system and electric vehicles, belong to electric vehicle engineering field.The battery system includes battery controller, current sensor, multiple battery modules, multiple electronic switches, multiple voltage sampling circuits, wherein:Multiple battery modules and current sensor are in series;There are one electronic switch, a voltage sampling circuits for the both ends parallel connection of each battery modules;Multiple electronic switches, multiple voltage sampling circuits, current sensor are electrically connected with battery controller;Battery controller, under being in charged state in battery system, determine the electricity of each battery modules, when the electricity for detecting the first battery modules in multiple battery modules is higher than average electricity, control is closed with the first electronic switch that the first battery modules are in parallel, when detecting that the electricity of the first battery modules is not higher than average electricity, the first electronic switch of control disconnects.Using the disclosure, battery system can be protected in the case where extra electric energy is not lost.

Description

Battery system and electric vehicle
Technical field
The disclosure is directed to electric vehicle engineering fields, especially with respect to a kind of battery system and electric vehicle.
Background technology
In the case of energy crisis and increasingly severe environmental pollution, electric vehicle is energy saving with its, low noise and zero-emission It the advantages such as puts to be rapidly developed.
For the power resources of electric vehicle in battery system, battery system includes multiple battery modules, these battery modules It is in series to form battery pack, for example, a typical battery system includes 96 battery modules, this 96 battery modules are mutually gone here and there Connection, battery system provide electric energy for electric vehicle as a whole.Although battery system can be put outward as a whole Electricity, but not fully due to each battery modules in battery system, in this way, when battery system is through excessive wheel charge and discharge week After phase, charged state, the discharge condition of some or multiple battery modules can be deviated with other battery modules, occurred putting or The case where overcharging, in the course of time, battery system will break down.
So in order to which the charged state and discharge condition that make each battery modules are in fairly horizontal, in the related technology, usually Meeting adjustable resistance in parallel on the circuit where each battery modules, in this way, for example, when external power supply is filled to battery system When electric, when the battery controller of battery system detects that the electricity of some battery modules is higher than average electricity, then change and be somebody's turn to do The size for the adjustable resistance that battery modules are in parallel makes adjustable resistance consume the electricity of the battery modules, to reduce the battery mould The electricity of group, and then the charged state of the battery modules is made to be in fairly horizontal with the charged state of other battery modules.
During realizing the disclosure, inventor has found to have at least the following problems:
The above-mentioned circuit serial adjustable where each battery modules hinders the scheme of the electricity to adjust battery modules, although Battery system is protected, but waste is caused to energy.
Invention content
Present disclose provides a kind of battery system and electric vehicles, to overcome the problems, such as present in the relevant technologies.The skill Art scheme is as follows:
According to the embodiment of the present disclosure, a kind of battery system is provided, the battery system includes battery controller, current sense Device, multiple battery modules, multiple electronic switches, multiple voltage sampling circuits, wherein:
The multiple battery modules, the current sensor are in series;
The both ends of each battery modules are in parallel respectively, and there are one electronic switch, a voltage sampling circuits;
The multiple electronic switch, the multiple voltage sampling circuit, the current sensor are controlled with the battery Device is electrically connected;
The battery controller, in the case where the battery system is in charged state, being sent out based on the current sensor The quantity of the current value, the voltage value that each voltage sampling circuit is sent and the battery modules that send, determines each battery mould Group electricity, when the electricity for detecting the first battery modules in multiple battery modules be higher than average electricity when, control with it is described The first electronic switch that first battery modules are in parallel is closed, when the electricity for detecting the first battery modules in multiple battery modules When amount is not higher than average electricity, control is disconnected with the first electronic switch that first battery modules are in parallel.
Optionally, the battery system further includes multiple inductance and multiple diodes;
The both ends of each battery modules are parallel with the electronic switch and inductance that one group is in series;
There are one diode, the cathode of each diode electronic cuttings in parallel with it for the both ends parallel connection of each electronic switch Close institute concatenated battery modules anode electric connection.
Optionally, the battery controller, for when the electricity for detecting the first battery modules in multiple battery modules When higher than average electricity, the electricity between electricity and average electricity based on the first battery modules is poor and pre-stored electricity The correspondence of amount difference and the connection duration of electronic switch, the first electronic switch that control is in parallel with first battery modules Closure duration.
Optionally, the electronic switch is managed for mos.
Optionally, the quantity of the battery modules is the first default value.
Optionally, each battery modules include multiple single batteries, and the multiple single battery is in parallel.
Optionally, the quantity of the single battery is the second default value.
Also provide a kind of electric vehicle according to the embodiment of the present disclosure, the electric vehicle includes battery system described above System.
The technical scheme provided by this disclosed embodiment at least can include the following benefits:
In the embodiment of the present disclosure, electronic switch there are one the both ends parallel connections of each battery modules in above-mentioned battery system, when When battery controller detects that the electricity of some or multiple battery modules is higher than average electricity, control is with electricity higher than average The electronic switch that the battery modules of electricity are in parallel is closed, and then keeps these electricity short higher than the battery modules of average electricity Road, external power supply can be in addition to electricity is higher than other battery modules charging other than the battery modules of average electricity;Work as battery When controller detects that the electricity of some or multiple battery modules is not higher than average electricity, control is with electricity not higher than average The electronic switch that the battery modules of electricity are in parallel disconnects, and then external power supply can be to these electricity not higher than average electricity Battery modules charge.As it can be seen that this battery system in the both ends of an each battery modules electronic switch in parallel, makes each electricity The electricity of pond module is in fairly horizontal, and then it is fairly horizontal so that the charged state of each battery modules is also at, and avoids one A little battery modules occur also continuing to extra electricity can not be lost in turn in charged state full of after because charging is too fast In the case of energy, battery system is protected.
It should be understood that above general description and following detailed description is only exemplary and explanatory, not The disclosure can be limited.
Description of the drawings
The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the disclosure Example, and together with specification for explaining the principles of this disclosure.In the accompanying drawings:
Fig. 1 is the structural schematic diagram according to a kind of battery system for implementing to exemplify;
Fig. 2 is the structural schematic diagram according to a kind of battery system for implementing to exemplify;
Fig. 3 is the structural schematic diagram according to a kind of battery system for implementing to exemplify.
Marginal data
1, battery controller 2, current sensor
3, battery modules 4, electronic switch
5, voltage sampling circuit 6, inductance
7, diode 31, the first battery modules
41, the first electronic switch 61, the first inductance
71, the first diode
Through the above attached drawings, it has been shown that the specific embodiment of the disclosure will be hereinafter described in more detail.These attached drawings It is not intended to limit the scope of this disclosure concept by any means with verbal description, but is by referring to specific embodiments Those skilled in the art illustrate the concept of the disclosure.
Specific implementation mode
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment Described in embodiment do not represent all implementations consistent with this disclosure.On the contrary, they be only with it is such as appended The example of the consistent device and method of some aspects be described in detail in claims, the disclosure.
Present embodiment discloses a kind of battery system, which is applied to electric vehicle, is the power of electric vehicle Source.
As shown in Figure 1, battery system includes battery controller 1, current sensor 2, multiple battery modules 3, multiple electronics Switch 4, multiple voltage sampling circuits 5, wherein:Multiple battery modules 3, current sensor 2 are in series;Each battery modules 3 Both ends are in parallel respectively, and there are one 4, voltage sampling circuits 5 of electronic switch;Multiple electronic switches 4, multiple voltage sampling circuits 5, current sensor 2 is electrically connected with battery controller 1;Battery controller 1, for being in charged state in battery system Under, the number of the current value, the voltage value that each voltage sampling circuit 5 is sent and battery modules 3 that are sent based on current sensor 2 Amount, determines the electricity of each battery modules 3, when the electricity for detecting the first battery modules 31 in multiple battery modules 3 is higher than When average electricity, the first electronic switch 41 that control is in parallel with the first battery modules 31 is closed, when detecting multiple battery moulds When the electricity of the first battery modules 31 in group 3 is not higher than average electricity, first to be in parallel with the first battery modules 31 is controlled Electronic switch 41 disconnects.
Wherein, battery controller 1 again can abbreviation BCU (Battery Control Unit).Current sensor 2 is a kind of Detection device, is able to detect that the current value of institute's series circuit, and is sent to battery controller 1.Voltage sampling circuit 5 is a kind of Detection circuit, is able to detect that the voltage value at component both ends in parallel therewith, such as can detect 3 both ends of each battery module Voltage value, the voltage value detected is then sent to battery controller 1.
In force, as shown in Figure 1, battery system further includes that power input for accessing external power supply and power supply are defeated Outlet, wherein positive sign indicates power input in Fig. 1, and negative sign indicates power output end, as shown in Figure 1, power input, electricity Source output terminal is electrically connected with two battery modules 3 for being located at both ends in 3 series circuit of multiple battery modules respectively, for example, such as Shown in Fig. 1, the battery modules positioned at both ends are denoted as A and B, the anode electric connection of power input and A, power output end respectively It is electrically connected with the cathode of B battery module.The both ends of each battery modules 3 electronic switch 4 in parallel, works as electronic switch 4 in the closure state, and electronic switch 4 can be shorted out the battery modules 3 being in parallel therewith so that external power supply directly around Cross the battery modules 3 being in parallel with the electronic switch of closure 4.
Based on foregoing circuit connection relation, current sensor 2 periodically can send all batteries to battery controller 1 The current value of 3 place series circuit of module, each voltage sampling circuit 5 can periodically send to battery controller 1 each The voltage value at 3 both ends of battery module after battery controller 1 receives the current value of the transmission of current sensor 2, is based on battery mould The quantity of group 3, it may be determined that go out the current value of each battery modules 3, later, battery controller 1 can be based on each battery The current value and voltage value of module 3 determine the electricity of each battery modules 3.Battery controller 1 determines the electricity of each battery modules 3 After amount, average electricity may further be determined, then, judge the electricity of each battery modules 3 and the relationship of average electricity, Wherein, there are two types of judging results:If it is judged that the electricity of the first battery modules 31 in multiple battery modules 3 is higher than average electricity Amount, then control are closed with the first electronic switch 41 that the first battery modules 31 are in parallel, and so that the first battery modules 31 is short-circuited, outside Portion's power supply charges around the first battery modules 31 to other battery modules 3;If detecting the first electricity in multiple battery modules 3 The electricity of pond module 31 is not higher than average electricity, then control is broken with the first electronic switch 41 that the first battery modules 31 are in parallel It opens, such external power supply can be that the first battery modules 31 charge.
Based on described above, during external power supply is battery system charging, when some battery modules 3, such as the When the comparision of quantity of electricity of one battery modules 31 is high, such as it is higher than average electricity, then the control of battery controller 1 and 31 phase of the first battery modules The first electronic switch 41 in parallel is closed so that external power supply to other battery modules 3 in addition to the first battery modules 31 after Continuous charging.During charging with other battery modules 3, average electricity will increase accordingly, when battery controller 1 detects When the electricity of first battery modules 31 is not higher than average electricity, then the disconnection of the first electronic switch is controlled so that external power supply can be with It charges for the first battery modules 31.
In this way, when battery system is in charged state, the electricity of each battery modules 3 is at more comparable water It is flat, in turn, the charged state of all battery modules 3 is made to be in fairly horizontal.As it can be seen that in parallel at the both ends of each battery modules 3 One electronic switch 4, can balanced each battery modules 3 electricity, and then can balanced each battery modules 3 charged state, protect Battery system is protected, the service life of battery system is extended.Moreover, in the both ends of an each battery modules electronic switch in parallel, Compared with the both ends parallel connection adjustable resistance in the prior art in each battery modules, it is clear that electric energy can be saved.
Optionally, in order to protect battery module 3, correspondingly, as shown in Fig. 2, battery system further includes multiple inductance 6 and more A diode 7;The both ends of each battery modules 3 are parallel with one group of electronic switch being in series 4 and inductance 6;Each electronic switch 4 Both ends parallel connection there are one diode 7, the cathode of each diode 7 electronic switch 4 in parallel with it concatenated battery moulds The anode of group 3 is electrically connected.
In force, as shown in Fig. 2, an electronic switch 4 and an inductance 6 are connected in parallel on a battery mould after being in series The both ends of group 3, there are one diodes 7 for the both ends also parallel connection of battery modules 3, wherein the cathode of diode and battery in parallel The anode of module 3 is connected.For example, as shown in figure 3, the both ends of the first battery modules 31 in multiple battery modules 3 are parallel with one The first electronic switch 41 and the first inductance 61 that group is serially connected, the both ends of the first battery modules 31 are also parallel with the first diode 71, wherein the cathode of the first diode 71 and the anode of the first battery modules 31 are electrically connected.When battery controller 1 detects When the electricity of first battery modules 31 is higher than average electricity, the first electronic switch 41 of control is closed, and the first inductance 71 is at this time Charging process continues to charge with battery system, when battery controller 1 detects that the electricity of the first battery modules 31 is not higher than When average electricity, the first electronic switch 41 of control disconnects, at this point, the first inductance 61 be in discharge process, the first inductance 61 is the One battery modules 31 charge.In this way, the first inductance 61 can prevent the electric current in the first battery modules 31 from interrupting suddenly, to first Battery modules 31 damage, and in turn, can protect the first battery modules 31.As it can be seen that the first inductance 61 is to the first battery modules 31 chargings, can not only improve the utilization rate of electric energy, can also protect the first battery modules 31.
Optionally, battery controller 1 can according to the difference between the electricity and average electricity of battery modules 3, determine with The connection duration for the electronic switch 4 that battery modules 3 are in parallel, correspondingly, storing battery modules 3 in battery controller 1 in advance Electricity and average electricity between electricity is poor and electronic switch connects the correspondence of duration, wherein electricity difference is more than zero Number, for example, when electricity difference is in the first default value range, when closure of electronic switch a length of first default value, electricity When amount difference is within the scope of the second default value, when closure of electronic switch a length of second default value, etc., wherein first is pre- It is according to theoretical calculation and more if numberical range, the second default value range, the first default value and second default value etc. It is secondary experiment and determine.For example, electricity difference as shown in Table 1 connects the mapping table of duration with electronic switch.In this way, working as battery When controller 1 detects that the electricity of the first battery modules in multiple battery modules is higher than average electricity, it is based on the first battery mould Electricity between the electricity and average electricity of group is poor and the correspondence of the connection duration of pre-stored electricity difference and electronic switch Relationship, the closure duration for the first electronic switch that control is in parallel with the first battery modules.
1 electricity difference of table is closed the mapping table of duration with electronic switch
Electricity is poor (millivolt) 0 to 2 2 to 5 5 to 10 More than 10
It is closed duration (second) 5 10 15 20
Wherein, by sending electric signal to electronic switch 4, electronic switch 4 receives battery controller 1 in practical applications Corresponding actions are carried out after electric signal, for example, when battery controller 1 sends high level signal to electronic switch 4, electronic switch 4 It is closed, when sending low level signal to electronic switch 4, electronic switch 4 disconnects, in this way, battery controller 1 is by controlling high level The duty ratio of signal, to control the closure duration of electronic switch 4, wherein duty ratio refers in a pulse cycle, when energization Between relative to the ratio shared by total time.
In this way, battery controller 1 can be poor according to the electricity between the electricity and average electricity of battery modules 3, to control The closure duration for the electronic switch 4 being in parallel with battery modules 3, in turn, the charging and stopping for controlling battery modules 3 charge, from And the charged state of balanced each battery modules 3 so that the charged state of all battery modules 3 be at it is fairly horizontal, into one Step, all battery modules 3 can almost simultaneously reach full state, in turn, can prevent some battery modules 3 full of When also continue to be in charged state, to playing a protective role to battery modules.
Optionally, electronic switch 4 can be the component that switching function can be arbitrarily completed under electric signal control, example Such as, electronic switch 4 can be mos pipes.Wherein, mos pipes are metal (metal)-oxide (oxide)-semiconductors (semiconductor) field-effect transistor.
Optionally, the quantity of battery modules 3 is the first default value, wherein the first default value can be according to electronic vapour The power demand of vehicle and set, for example, 32 battery modules 3 can be arranged.
Optionally, in order to increase the current value that each battery modules 3 convey outward, correspondingly, each battery modules 3 can be with It is in parallel by multiple single batteries and is formed, correspondingly, each battery modules 3 include multiple single batteries, multiple single batteries It is in parallel to form battery modules 3.Wherein, the quantity of single battery is the second default value, and the second default value can be according to reality Border demand setting, for example, the quantity of single battery can be 24.
In the embodiment of the present disclosure, electronic switch there are one the both ends parallel connections of each battery modules in above-mentioned battery system, when When battery controller detects that the electricity of some or multiple battery modules is higher than average electricity, control is with electricity higher than average The electronic switch that the battery modules of electricity are in parallel is closed, and then keeps these electricity short higher than the battery modules of average electricity Road, external power supply can be in addition to electricity is higher than other battery modules charging other than the battery modules of average electricity;Work as battery When controller detects that the electricity of some or multiple battery modules is not higher than average electricity, control is with electricity not higher than average The electronic switch that the battery modules of electricity are in parallel disconnects, and then external power supply can be to these electricity not higher than average electricity Battery modules charge.As it can be seen that this battery system in the both ends of an each battery modules electronic switch in parallel, makes each electricity The electricity of pond module is in fairly horizontal, and then it is fairly horizontal so that the charged state of each battery modules is also at, and avoids one A little battery modules occur also continuing to extra electricity can not be lost in turn in charged state full of after because charging is too fast In the case of energy, battery system is protected.
The disclosure additionally provides a kind of electric vehicle, which includes battery system described above, such as above-mentioned institute It states, there are one electronic switches for the both ends parallel connection of each battery modules in the battery system, when battery controller detects some Or the electricity of multiple battery modules, when being higher than average electricity, battery modules of the control with electricity higher than average electricity are in parallel Electronic switch is closed, and then these electricity is made to be short-circuited higher than the battery modules of average electricity, and external power supply can be in addition to electricity Amount is higher than other battery modules charging other than the battery modules of average electricity;When battery controller detect some or it is more When the electricity of a battery modules is not higher than average electricity, control is with electricity not higher than the electricity that the battery modules of average electricity are in parallel Sub switch disconnects, and then the battery modules that external power supply can be to these electricity not higher than average electricity charge.As it can be seen that it is this The battery system of a both ends electronic switch in parallel for each battery modules, makes the electricity of each battery modules be in suitable water It is flat, and then it is fairly horizontal so that the charged state of each battery modules is also at, and avoids some battery modules due to charging is too fast Occur also continuing to be in charged state full of after, in turn, battery system can be protected in the case where extra electric energy is not lost System.
Those skilled in the art will readily occur to its of the disclosure after considering specification and putting into practice disclosure disclosed herein Its embodiment.This application is intended to cover any variations, uses, or adaptations of the disclosure, these modifications, purposes or Person's adaptive change follows the general principles of this disclosure and includes the undocumented common knowledge in the art of the disclosure Or conventional techniques.The description and examples are only to be considered as illustrative, and the true scope and spirit of the disclosure are by above Claim is pointed out.
It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and And various modifications and changes may be made without departing from the scope thereof.The scope of the present disclosure is only limited by the accompanying claims.

Claims (8)

1. a kind of battery system, which is characterized in that the battery system includes battery controller, current sensor, multiple batteries Module, multiple electronic switches, multiple voltage sampling circuits, wherein:
The multiple battery modules and the current sensor are in series;
The both ends of each battery modules are in parallel respectively, and there are one electronic switch, a voltage sampling circuits;
The multiple electronic switch, the multiple voltage sampling circuit, the current sensor are electric with the battery controller Property connection;
The battery controller, in the case where the battery system is in charged state, being sent based on the current sensor The quantity of current value, the voltage value that each voltage sampling circuit is sent and the battery modules, determines each battery modules Electricity, when the electricity for detecting the first battery modules in multiple battery modules is higher than average electricity, control and described first The first electronic switch that battery modules are in parallel is closed, when the electricity for detecting the first battery modules in multiple battery modules not When higher than average electricity, control is disconnected with the first electronic switch that first battery modules are in parallel.
2. battery system according to claim 1, which is characterized in that the battery system further includes multiple inductance and multiple Diode;
The both ends of each battery modules are parallel with the electronic switch and inductance that one group is in series;
There are one diode, the cathode of each diode electronic switch institutes in parallel with it for the both ends parallel connection of each electronic switch The anode of concatenated battery modules is electrically connected.
3. battery system according to claim 1, which is characterized in that the battery controller, for multiple when detecting When the electricity of the first battery modules in battery modules is higher than average electricity, the electricity based on the first battery modules and average electricity Between electricity is poor and the correspondence of the connection duration of pre-stored electricity difference and electronic switch, control and described the The closure duration for the first electronic switch that one battery modules are in parallel.
4. battery system according to claim 1, which is characterized in that the electronic switch is managed for mos.
5. battery system according to claim 1, which is characterized in that the quantity of the battery modules is the first present count Value.
6. battery system according to claim 1, which is characterized in that each battery modules include multiple single batteries, institute Multiple single batteries are stated to be in parallel.
7. battery system according to claim 6, which is characterized in that the quantity of the single battery is the second present count Value.
8. a kind of electric vehicle, which is characterized in that the electric vehicle includes claim 1-7 any one of them batteries system System.
CN201810383945.4A 2018-04-26 2018-04-26 battery system and electric vehicle Pending CN108550926A (en)

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CN111049205A (en) * 2018-10-12 2020-04-21 宏碁股份有限公司 Battery management method and power supply system

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