CN110015166A - Battery equalization system and vehicle - Google Patents
Battery equalization system and vehicle Download PDFInfo
- Publication number
- CN110015166A CN110015166A CN201710775018.2A CN201710775018A CN110015166A CN 110015166 A CN110015166 A CN 110015166A CN 201710775018 A CN201710775018 A CN 201710775018A CN 110015166 A CN110015166 A CN 110015166A
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- battery
- single battery
- controller
- equilibrium
- balanced
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
- B60L58/21—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules having the same nominal voltage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
- B60L58/22—Balancing the charge of battery modules
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/547—Voltage
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Transportation (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a kind of battery equalization system and vehicles.The battery equalization system includes: battery pack；Acquisition Circuit, for acquiring the parameter information of single battery in battery pack；Equalizing circuit, for carrying out equilibrium treatment to the single battery in battery pack, equalizing circuit includes the first resistor for being parallel to single battery both ends in battery pack, and first resistor is the thermistor of positive temperature coefficient；Controller, when for there is single battery to need to open balanced in battery pack, control equalizing circuit discharges needing to open balanced single battery.The disclosure solves the technical issues of heat generated when equalizing resistance equilibrium in the battery equalization system of the relevant technologies causes system temperature to rise due to influence system working performance.
Description
Technical field
This disclosure relates to battery pack balancing field, and in particular, to a kind of battery equalization system and vehicle.
Background technique
In electric car, battery pack is its important component part.Since battery pack is connected by multiple single batteries
It is formed by connecting, with the use of battery, the otherness in battery pack between each monomer is gradually expanded, and is caused consistent between battery cell
Property is poor.Due to the short -board effect of battery, prevents battery capacity from giving full play to, the whole volume of battery pack is caused to reduce.Cause
This, carries out effective balanced management to batteries of electric automobile group, is conducive to the consistency for improving each single battery in battery pack,
The capacitance loss for reducing battery, extends the service life and electric car continual mileage of battery, has a very important significance.
In correlated equilibrium technology practical application, battery equalization system generallys use passive balanced way, i.e., in each monomer
Single battery is then connected to equalizing resistance, is put when needing balanced by battery both ends one definite value equalizing resistance of parallel connection
Electricity, to achieve the purpose that single battery equilibrium.
In the equal balance system of the relevant technologies, equalizing resistance is definite value equalizing resistance, and electric current is a determining value when balanced, this
It will affect the performance of battery equalization system.Be mainly shown as: when battery pack opens equilibrium, equalizing resistance will generate heat, lead
Battery balanced system temperature is caused to rise, to influence its working performance.Further, since equalizing resistance is fixed value resistance, balanced electricity
Stream is unable to adjust automatically, and can not be control effectively to the calorific value of battery equalization system.
Summary of the invention
Purpose of this disclosure is to provide a kind of battery equalization system and vehicles, for solving the battery balanced of the relevant technologies
The heat generated when equalizing resistance equilibrium in system influences the technology of system working performance due to cause system temperature to rise and asks
Topic.
To achieve the goals above, present disclose provides a kind of battery equalization systems, comprising:
Battery pack；
Acquisition Circuit, for acquiring the parameter information of single battery in battery pack；
Equalizing circuit, for carrying out equilibrium treatment to the single battery in the battery pack, the equalizing circuit includes simultaneously
It is coupled to the first resistor at single battery both ends in the battery pack, the first resistor is the thermistor of positive temperature coefficient；
Controller, for determining in the battery pack there is list according to the parameter information of single battery in the battery pack
When body battery needs to open balanced, controls the equalizing circuit and discharge the single battery for needing unlatching balanced.
Optionally, the equalizing circuit further includes being controlled by described with the concatenated switch of the first resistor, the switch
Controller；When the switch is connected under the control of the controller, the first resistor and the single battery are formed back
Road is to discharge to the single battery.
Optionally, the switch is relay switch.
Optionally, the equalizing circuit further includes being with the concatenated second resistance of the first resistor, the second resistance
Fixed value resistance.
Optionally, the controller by two channels respectively with the Acquisition Circuit that corresponds to same single battery and equal
Weigh circuit connection.
Optionally, the controller includes control chip, and the control chip is by two pins respectively and corresponding to same
The Acquisition Circuit of one single battery is connected with equalizing circuit, and described two pins and described two channels correspond, and described two
A pin in a pin is connect by a channel in described two channels with the equalizing circuit, described two to draw
Another pin in foot is connect by another channel in described two channels with the Acquisition Circuit.
Optionally, the controller passes through channel and the Acquisition Circuit that corresponds to same single battery and balanced electric
Road connects, channel described in the Acquisition Circuit and the equalizing circuit time-sharing multiplex；
The controller is used for when determining that the single battery does not need to carry out equilibrium, is controlled the controller and is passed through
The channel is connected with corresponding Acquisition Circuit；Alternatively,
The controller is also used to connect when determining that the single battery needs to carry out balanced by the channel timesharing
It is connected to the corresponding Acquisition Circuit and the equalizing circuit.
Optionally, the controller includes control chip, and the control chip is by a pin and corresponds to same list
The Acquisition Circuit of body battery is connected with equalizing circuit, and the pin passes through the channel and the equalizing circuit and the acquisition
Circuit connection.
Optionally, the controller is also used to determining in the battery pack have according to the parameter information of the battery pack
When single battery needs to open balanced, the target equilibrium duration for needing to open balanced single battery is obtained, and according to institute
It states and the target equilibrium duration for opening balanced single battery is needed to control the equalizing circuit to the list for needing unlatching balanced
Body battery discharges.
Optionally, the controller controls the equalizing circuit pair according to the target equilibrium duration and balanced duty ratio
Described that the single battery for opening equilibrium is needed to discharge, the equilibrium duty ratio is the monomer electricity for needing to open equilibrium
The time for balance section in pond and the ratio of unit period, the unit period include the time for balance section and acquisition time section.
Optionally, the parameter information includes the voltage value of each single battery；The controller is used for by with lower section
Formula determines the single battery for needing to open equilibrium:
The smallest voltage value in the voltage value of single battery each in the battery pack is determined as reference voltage value；
It, will according to the voltage difference between the voltage value and the reference voltage value of single battery each in the battery pack
The single battery that voltage difference is greater than or equal to predeterminated voltage difference threshold value is determined as the single battery for needing to open equilibrium.
The disclosure additionally provides a kind of vehicle, including above-mentioned battery equalization system.
The technical scheme provided by this disclosed embodiment can include the following benefits:
First resistor in the disclosure is by using posive temperature coefficient thermistor, with the variation of temperature, first resistor
Resistance value size can also change, the euqalizing current generated when thus adjustable balanced, and then automatically adjust battery balanced system
The calorific value of system, and finally control effectively to the temperature of battery equalization system, solve the battery balanced system of the relevant technologies
The technical issues of heat generated when equalizing resistance equilibrium in system causes system temperature to rise due to influence system working performance.
Other feature and advantage of the disclosure will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
Attached drawing is and to constitute part of specification for providing further understanding of the disclosure, with following tool
Body embodiment is used to explain the disclosure together, but does not constitute the limitation to the disclosure.In the accompanying drawings:
Fig. 1 is a kind of block diagram of battery equalization system shown according to an exemplary embodiment.
Fig. 2 is a kind of equalizing circuit schematic diagram of battery equalization system shown according to an exemplary embodiment.
Fig. 3 is a kind of another schematic diagram of equalizing circuit of battery equalization system shown according to an exemplary embodiment.
Fig. 4 is a kind of another block diagram of battery equalization system shown according to an exemplary embodiment.
Specific embodiment
It is described in detail below in conjunction with specific embodiment of the attached drawing to the disclosure.It should be understood that this place is retouched
The specific embodiment stated is only used for describing and explaining the disclosure, is not limited to the disclosure.
Fig. 1 is a kind of block diagram of battery equalization system shown according to an exemplary embodiment, and Fig. 2 is according to an example
Property implement the equalizing circuit schematic diagram of a kind of battery equalization system exemplified.As depicted in figs. 1 and 2, the battery balanced system
System 10 includes battery pack 11, Acquisition Circuit 12, equalizing circuit 13 and controller 14, wherein the battery pack 11 is by multiple
Single battery 111 is connected in series.
In Fig. 1, the controller 14 is by two channels 120,130 respectively and corresponding to same single battery 111
Acquisition Circuit 12 and equalizing circuit 13 connect.The controller 14 includes control chip, and the control chip passes through two pins
It is connect respectively with the Acquisition Circuit 12 and equalizing circuit 13 for corresponding to same single battery 111, described two pins and described two
A channel 120,130 corresponds, and a pin in described two pins passes through the channel 130 and the equalizing circuit
13 connect, and another pin in described two pins is connect by the channel 120 with the Acquisition Circuit 12.
As shown in Figure 1, the Acquisition Circuit 12 is used to acquire the parameter information of single battery 111 in battery pack 11, and to
The controller 14 sends the parameter information of the collected battery pack, and the single battery 111 in the battery pack 11 can be with
It is corresponded with Acquisition Circuit 12.Wherein, the parameter information includes the information such as cell voltage, temperature.The controller 14 is logical
It crosses and channel 120 is connected, and then state the parameter information that Acquisition Circuit 12 acquires battery pack 11 described in control.
As depicted in figs. 1 and 2, the equalizing circuit 13 is for carrying out the single battery 111 in the battery pack 11
Weighing apparatus processing.The equalizing circuit 13 includes first resistor 131, the both ends of every section single battery 111 first resistor in parallel
131, the first resistor 131 is the thermistor of positive temperature coefficient.Balanced monomer is opened when in need in the battery pack
When battery 111, when the single battery 111 of equilibrium in need in the battery pack 11, the equalizing circuit 13 and the control
Channel 130 between device 14 is connected, and be parallel to the first resistor 131 for needing to open balanced single battery 111 with
The shunt circuit of the single battery 111 is connected, passive balanced to open.Wherein, since the first resistor 131 is using positive temperature
The thermistor of coefficient is spent, resistance value can vary with temperature and change, and when temperature is higher, resistance value is bigger, in temperature
When lower, resistance value is smaller.
The controller 14 is for determining the electricity according to the parameter information of single battery 111 in the battery pack 11
When thering is single battery 111 to need to open balanced in pond group 11, corresponding channel 130 is connected, and control the equalizing circuit 13
The single battery 111 for opening equilibrium is needed to discharge to described.
The controller 14 can determine the single battery 111 for needing to open equilibrium in the following manner:
Firstly, according to the voltage value of each single battery 111 in the collected battery pack 11 of the Acquisition Circuit 12,
The smallest voltage value in the voltage value of single battery 111 each in the battery pack 11 is worth as the reference voltage；
Then, according to the electricity between the voltage value and the reference voltage value of single battery 111 each in the battery pack 11
The single battery 111 that voltage difference is greater than or equal to predeterminated voltage difference threshold value is determined as the needs and opens equilibrium by pressure difference
Single battery 111.
Optionally, the controller 14 is used to determine according to the parameter information of single battery 111 in the battery pack 11
When thering is single battery 111 to need to open balanced in the battery pack 11, such as according to the single battery for needing unlatching balanced
111 voltage value and the reference voltage value obtain the target equilibrium duration for needing to open balanced single battery 111,
And the equalizing circuit 13 is controlled to the need according to the target equilibrium duration for needing to open balanced single battery 111
Balanced single battery 111 is opened to discharge.
Further, the controller 14 is according to the target equilibrium duration and the balanced duty ratio control balanced electricity
Road 13 needs the single battery 111 for opening equilibrium to discharge to described, and the equilibrium duty ratio is opened balanced for the needs
Single battery 111 time for balance section and unit period ratio.One unit period include: the time for balance section and
Acquisition time section.In the acquisition time section, the Acquisition Circuit 12 acquires the parameter information of the battery pack 11；Described
Time for balance section, the equalizing circuit 13 carry out equilibrium treatment to the single battery 111 for needing equilibrium in the battery pack 11.
For example, the Acquisition Circuit 12 can by the voltage value of each single battery 111 of the battery pack 11 most
Small voltage value is determined as the reference voltage value, and the predeterminated voltage difference threshold value can be 5mV (or other numerical value).It is first
First, the controller 14 is compared to obtain minimum amount of voltage that Vmin in each single battery 111, and determines the battery pack 11
Whether the voltage value of each single battery 111 and the difference of Vmin are less than 5mV.If it is, the equilibrium of the battery pack 11 is consistent
Property is fine, does not need equilibrium；If it is greater than 5mV, then the single battery 111 with Vmin difference greater than 5mV is opened as needs
Open balanced single battery 111.Then, the controller 14 controls the equalizing circuit 13 and opens equilibrium to the needs
Single battery 111 discharges.
During discharge, the controller 14 can constantly read the single battery 111 for needing to open equilibrium
Information of voltage, and judge whether Vmin and the voltage difference of the single battery are less than 5mV.If it is, stop electric discharge, it is balanced
Terminate；If being still greater than 5mV, continue to read the information of voltage for needing to open balanced single battery 111, until
The voltage difference of Vmin and the single battery is less than 5mV, stops electric discharge, and equilibrium terminates.
Wherein, it after determining the single battery 111 for needing to open equilibrium, can also be opened according to the needs equal
The voltage value and Vmin of the single battery 111 of weighing apparatus, when calculating the target equilibrium for needing to open balanced single battery 111
It is long, and then after electric discharge starts, it counts to the electric discharge duration for needing to open balanced single battery 111, when monomer electricity
When the difference of the charging duration in pond 111 duration balanced with the target is in threshold range, stop electric discharge, equilibrium terminates.
In correlated equilibrium technology practical application, the resistance of the single battery parallel connection balanced with needing in battery pack is fixed
Be worth resistance, the heat generated in equilibrium will lead to the rising of battery equalization system temperature, and it is balanced when the euqalizing current that generates without
Method automatic adjustment, and then can not control effectively to the calorific value of battery equalization system.And the first resistor in the disclosure exists
When battery equalization system temperature drift, resistance value can become larger, and the euqalizing current generated when thus balanced can reduce, and then reduce
The calorific value of first resistor, reduces the temperature of battery equalization system, and battery equalization system temperature is finally made to restore normal；
When battery equalization system temperature is relatively low, the resistance value of the first resistor in the disclosure can become smaller, and generate when thus balanced equal
Weighing apparatus electric current will increase, and then increase the calorific value of first resistor, the temperature of battery equalization system be improved, so that battery is equal
Balance system temperature restores normal.
First resistor in the disclosure is by using posive temperature coefficient thermistor, with the variation of temperature, first resistor
Resistance value size can also change, the euqalizing current generated when thus adjustable balanced, and then automatically adjust battery balanced system
The calorific value of system, and finally control effectively to the temperature of battery equalization system, solve the battery balanced system of the relevant technologies
The technical issues of heat generated when equalizing resistance equilibrium in system causes system temperature to rise due to influence system working performance.
As shown in Fig. 2, the equalizing circuit 10 further includes and the first resistor 131 in addition to including first resistor 131
Concatenated switch 132 is controlled by the controller 14；When being connected under control of the switch 132 in the controller 14,
The first resistor 131 is formed into a loop with the single battery 111 to discharge the single battery 111.Optionally, described
Switch 132 is relay switch, and the controller 14 controls the switch 132 by output control signal and is turned on or off.
As shown in Fig. 2, when determining the single battery 111 of equilibrium in need in battery pack 11, correspond to it is described need it is equal
The switch 132 of the single battery 111 of weighing apparatus is connected under the control signal that the controller 14 exports, and in turn, is parallel to the need
The first resistor 131 for opening balanced single battery 111 is connected with the shunt circuit between the single battery 111, to institute
It states and needs to open the balanced progress equilibrium treatment of single battery 111.In equilibrium, if the temperature of battery equalization system 10 is inclined
Height, then due to the characteristic of thermistor, resistance value can become larger the first resistor 131, thus the equilibrium electricity generated when equilibrium
Stream can reduce, and then reduce the calorific value of the first resistor 131, reduce the temperature of battery equalization system 10, finally make electricity
The temperature of the equal balance system 10 in pond restores normal；If the temperature of battery equalization system 10 is relatively low, the electricity of the first resistor 131
Resistance value can become smaller, and the euqalizing current generated when thus balanced will increase, and then increase the calorific value of the first resistor 131, mention
The high temperature of battery equalization system 10, so that the temperature of battery equalization system 10 restores normal.
If battery equalization system when under the normal temperature environment, determining the single battery of equilibrium in need in battery pack,
Be parallel to it is described need to open after the balanced first resistor of single battery is connected with the shunt circuit of the single battery, due to
The resistance value very little of thermistor at normal temperature, therefore, it is possible to lead to short circuit.When balanced at normal temperature in order to prevent
There is the situation of short circuit in circuit, and referring to figure 3., Fig. 3 is a kind of battery equalization system shown according to an exemplary embodiment
Another schematic diagram of equalizing circuit.As shown in figure 3, the equalizing circuit 13 further includes and the first resistor 131 concatenated second
Resistance 133, the second resistance 133 are parallel to the both ends of single battery 111 in the battery pack 11, and the second resistance
133 correspond with the single battery 111 in the battery pack 11.Wherein, the second resistance 133 is fixed value resistance.Separately
Outside, because of the resistance value very little of thermistor at normal temperature, it can not play carry out balanced effect to single battery at this time,
And second resistance can realize the passive equilibrium to single battery as fixed value resistance as discharge resistance.
As shown in figure 3, determining the list of equilibrium in need in battery pack 11 when battery equalization system 10 is under normal temperature environment
When body battery 111, the control that is exported corresponding to the switch 132 for needing balanced single battery 111 in the controller 14
It is connected under signal, in turn, is parallel to the first resistor 131 for needing to open balanced single battery 111 and the single battery
Shunt circuit conducting between 111, to need to open the balanced progress equilibrium treatment of single battery 111 to described.Due to described
First resistor 131 is connected with the second resistance 133 as fixed value resistance, even if the first resistor as thermistor
131 resistance value very little at normal temperature, the equalizing circuit 13 will not occur short circuit, avoid the generation of short-circuit conditions, protect
Circuit is protected.
The disclosure is by a fixed value resistance of connecting on the basis of first resistor, and battery equalization system is in normal temperature environment
When lower progress equilibrium treatment, even if the resistance value very little of first resistor at normal temperature as thermistor, equalizing circuit cannot
Play the role of to single battery equilibrium treatment, the fixed value resistance can realize the quilt to single battery as discharge resistance
Dynamic equilibrium, another aspect, will not occur short circuit, avoid the generation of short-circuit conditions, protect circuit.
Fig. 4 is a kind of another block diagram of battery equalization system shown according to an exemplary embodiment.Such as Fig. 4 and Fig. 2 institute
Show, the battery equalization system 10 includes battery pack 11, Acquisition Circuit 12, equalizing circuit 13 and controller 14, wherein described
Battery pack 11 is connected in series by multiple single batteries 111.Difference with the battery equalization system in Fig. 1 is, is scheming
In 4, the controller 14 of battery equalization system passes through a channel 140 and the acquisition electricity for corresponding to same single battery 111
Road 12 and equalizing circuit 13 connect, channel 140 described in the Acquisition Circuit 12 and 13 time-sharing multiplex of equalizing circuit.
When the controller 14 determines that single battery 111 does not need to carry out equilibrium, the controller 14 passes through described logical
Road 140 is connected with corresponding Acquisition Circuit 12；Alternatively, when the controller 14 determines that single battery 111 needs to carry out equilibrium
When, the 13 time-sharing multiplex channel 140 of the corresponding Acquisition Circuit 12 of single battery 111 and equalizing circuit.
The controller 14 includes control chip, and the control chip is by a pin and corresponds to same monomer electricity
The Acquisition Circuit 12 and equalizing circuit 13 in pond 111 connect, the pin by the channel 140 and the equalizing circuit 13 and
The Acquisition Circuit 12 connects.Single battery 111 of the controller 14 determining and Jing Guo equilibrium treatment does not need to carry out equal
When weighing apparatus, the controller 14 is connected by the channel 140 with corresponding Acquisition Circuit 12；Alternatively, the controller 14 is also used
In when determining that the single battery 111 Jing Guo equilibrium treatment needs to continue equilibrium, the controller 14 passes through described logical
140 timesharing of road is connected to corresponding Acquisition Circuit 12 and equalizing circuit 13.
Optionally, as shown in figure 4, the controller 14 controls institute according to the target equilibrium duration and balanced duty ratio
It states equalizing circuit 13 and needs the single battery 111 for opening equilibrium to discharge to described, the equilibrium duty ratio is the needs
The time for balance section of balanced single battery 111 and the ratio of unit period are opened, when the unit period includes described balanced
Between section and acquisition time section.In Fig. 4, the equilibrium duty ratio may be that the equalizing circuit 13 occupies the channel 140
Duration and the ratio between the occupied total duration in the channel 140；Wherein, the occupied total duration in the channel 140 includes described
Equalizing circuit 13 occupies the duration in the channel 140 and the Acquisition Circuit 12 occupies the duration in the channel 140.
As shown in fig. 4 and fig. 2, firstly, the controller 14 by 140 connection of channel in the Acquisition Circuit 12, Jin Erke
To state the parameter information that Acquisition Circuit 12 acquires battery pack 11 described in control；Then, the controller 14 is used for according to
The parameter information of single battery 111, which determines, in battery pack 11 has single battery 111 to need to open equilibrium in the battery pack 11
When, obtain the target equilibrium duration for needing to open balanced single battery 111 and balanced duty ratio, and by the channel
140 connection need to open equalizing circuit 13 corresponding to balanced single battery 111 in described；Then, the controller 14
The target equilibrium duration for opening balanced single battery 111 and balanced duty ratio is needed to control the equalizing circuit 13 according to described
The single battery 111 for opening equilibrium is needed to discharge to described, i.e., the described controller 14 can be according to the target equilibrium duration
With the turn-on time of the switch 132 of the equalizing circuit 13 in balanced duty ratio control figure 2.
Optionally, the controller 14 determines time for balance according to the target equilibrium duration and the balanced duty ratio
Section and acquisition time section, when the sum of the time for balance section and the acquisition time section are occupied total equal to the channel 140
It is long；In the acquisition time section, the channel 140 is connected to the Acquisition Circuit 12 so that the Acquisition Circuit 12 acquire it is described
The parameter information of battery pack 11；In the time for balance section, the connection of channel 140 needs to carry out the equilibrium electricity of equilibrium treatment
Road 13, and the equalizing circuit 13 is in the conductive state, so that the equalizing circuit 13 is balanced to needing in the battery pack 11
Single battery 111 carries out equilibrium treatment.
Due to the voltage collection circuit and equalizing circuit time-sharing multiplex of controller and each section single battery in the disclosure
One channel reduces the number of channels requirement to controller, thereby reduces hardware cost；And due to battery sampling and
Balanced separately to carry out, euqalizing current will not influence cell voltage, to improve the precision for ringing battery voltage sampling.
The disclosure additionally provides a kind of vehicle, including above-mentioned battery equalization system 10, wherein each circuit executes operation
Concrete mode be described in detail in the embodiment in relation to the system, no detailed explanation will be given here.
The preferred embodiment of the disclosure is described in detail in conjunction with attached drawing above, still, the disclosure is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the disclosure, a variety of letters can be carried out to the technical solution of the disclosure
Monotropic type, these simple variants belong to the protection scope of the disclosure.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, it can be combined in any appropriate way.In order to avoid unnecessary repetition, the disclosure is to various
No further explanation will be given for possible combination.
In addition, any combination can also be carried out between a variety of different embodiments of the disclosure, as long as it is without prejudice to originally
Disclosed thought equally should be considered as disclosure disclosure of that.
Claims (12)
1. a kind of battery equalization system characterized by comprising
Battery pack；
Acquisition Circuit, for acquiring the parameter information of single battery in battery pack；
Equalizing circuit, for carrying out equilibrium treatment to the single battery in the battery pack, the equalizing circuit includes being parallel to
The first resistor at single battery both ends in the battery pack, the first resistor are the thermistor of positive temperature coefficient；
Controller, for determining in the battery pack there is single battery according to the parameter information of single battery in the battery pack
When needing to open equilibrium, controls the equalizing circuit and need the single battery for opening equilibrium to discharge to described.
2. battery equalization system according to claim 1, which is characterized in that the equalizing circuit further includes and described first
The concatenated switch of resistance, the switch are controlled by the controller；When the switch is connected under the control of the controller,
The first resistor and the single battery are formed into a loop to discharge the single battery.
3. battery equalization system according to claim 2, which is characterized in that the switch is relay switch.
4. battery equalization system according to claim 1, which is characterized in that the equalizing circuit further includes and described first
The concatenated second resistance of resistance, the second resistance are fixed value resistance.
5. battery equalization system according to claim 1, which is characterized in that the controller by two channels respectively with
Acquisition Circuit corresponding to same single battery is connected with equalizing circuit.
6. battery equalization system according to claim 5, which is characterized in that the controller includes control chip, described
Control chip is connect with the Acquisition Circuit and equalizing circuit for corresponding to same single battery respectively by two pins, described two
Pin and described two channels correspond, and a pin in described two pins is logical by one in described two channels
Road is connect with the equalizing circuit, and another pin in described two pins passes through another channel and institute in described two channels
State Acquisition Circuit connection.
7. battery equalization system according to claim 1, which is characterized in that the controller by channel with it is corresponding
It is connected in the Acquisition Circuit of same single battery with equalizing circuit, described in the Acquisition Circuit and the equalizing circuit time-sharing multiplex
Channel；
The controller is used for when determining that the single battery does not need to carry out equilibrium, is controlled the controller and is led to by described
Road is connected with corresponding Acquisition Circuit；Alternatively,
The controller is also used to when determining that the single battery needs to carry out balanced, is connected to pair by the channel timesharing
The Acquisition Circuit answered and the equalizing circuit.
8. battery equalization system according to claim 7, which is characterized in that the controller includes control chip, described
Control chip is connect by a pin with the Acquisition Circuit and equalizing circuit for corresponding to same single battery, and the pin passes through
The channel is connect with the equalizing circuit and the Acquisition Circuit.
9. battery equalization system according to claim 1, which is characterized in that the controller is also used to according to the electricity
The parameter information of pond group determines when having single battery to need to open balanced in the battery pack that the acquisition needs are opened balanced
The target equilibrium duration of single battery, and according to described in the target equilibrium duration control for needing to open balanced single battery
Equalizing circuit needs the single battery for opening equilibrium to discharge to described.
10. battery equalization system according to claim 9, which is characterized in that the controller is balanced according to the target
Duration and balanced duty ratio control the equalizing circuit and need the single battery for opening equilibrium to discharge to described, the equilibrium
Duty ratio is the ratio of the time for balance section for needing to open balanced single battery and unit period, the unit period packet
Include the time for balance section and acquisition time section.
11. battery equalization system according to claim 1, which is characterized in that the parameter information includes each monomer electricity
The voltage value in pond；The controller is used to determine the single battery for needing to open equilibrium in the following manner:
The smallest voltage value in the voltage value of single battery each in the battery pack is determined as reference voltage value；
According to the voltage difference between the voltage value and the reference voltage value of single battery each in the battery pack, by voltage difference
Value, which is greater than or equal to, is determined as the single battery for needing unlatching balanced with the single battery of predeterminated voltage difference threshold value.
12. a kind of vehicle, which is characterized in that including battery equalization system described in any one of claims 1 to 11.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710775018.2A CN110015166B (en) | 2017-08-31 | 2017-08-31 | Battery equalization system and vehicle |
| PCT/CN2018/103682 WO2019042438A1 (en) | 2017-08-31 | 2018-08-31 | Battery balancing system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710775018.2A CN110015166B (en) | 2017-08-31 | 2017-08-31 | Battery equalization system and vehicle |
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| Publication Number | Publication Date |
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| CN110015166A true CN110015166A (en) | 2019-07-16 |
| CN110015166B CN110015166B (en) | 2022-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710775018.2A Active CN110015166B (en) | 2017-08-31 | 2017-08-31 | Battery equalization system and vehicle |
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| Country | Link |
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| CN (1) | CN110015166B (en) |
| WO (1) | WO2019042438A1 (en) |
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Also Published As
| Publication number | Publication date |
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| WO2019042438A1 (en) | 2019-03-07 |
| CN110015166B (en) | 2022-04-15 |
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