CN109245189A - A kind of battery management system and a kind of circuit for battery set charge/discharge - Google Patents
A kind of battery management system and a kind of circuit for battery set charge/discharge Download PDFInfo
- Publication number
- CN109245189A CN109245189A CN201710558590.3A CN201710558590A CN109245189A CN 109245189 A CN109245189 A CN 109245189A CN 201710558590 A CN201710558590 A CN 201710558590A CN 109245189 A CN109245189 A CN 109245189A
- Authority
- CN
- China
- Prior art keywords
- switch
- current
- bms
- voltage
- module
- 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
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/0071—Regulation of charging or discharging current or voltage with a programmable schedule
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00304—Overcurrent protection
-
- 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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
Abstract
The embodiment of the invention discloses a kind of battery management system and a kind of circuits for battery set charge/discharge.Wherein, which may include at least one voltage detection module D, battery management system BMS processor, current limliting module U3, current detection module I and at least one switch S1；Current limliting module U3 is in parallel with switch S1, connects after in parallel with current detection module I；Voltage detection module D, for detecting the voltage value of power supply Y1, rechargeable battery set U1；Current detection module I, the current value for circuit where detecting it；BMS processor, for controlling voltage detection module D, current limliting module U3, current detection module I and switch S1, the charging of rechargeable battery present in the relevant technologies be can solve not in the case where overcurrent, the low problem of efficiency for charge-discharge, it realizes in the case where ensureing the charging not overcurrent of rechargeable battery, rechargeable battery efficiency for charge-discharge improves, and has reached the beneficial effect that rechargeable battery safety and efficiency is taken into account.
Description
Technical field
The present invention relates to battery boosting technology fields, are used for battery in particular to battery management system and one kind
The circuit of group charge and discharge.
Background technique
It is easy to appear overcurrent in lithium battery charging process and then causes safety problem, guarantees that charging security is always battery
Management system (BATTERY MANAGEMENT SYSTEM, referred to as BMS) needs one of the important difficulty captured.Current skill
Art scheme is the series connection current limliting module in charge and discharge major loop, current limliting work always in charge and discharge process.Although this scheme solution
It has determined and has crossed flow problem, but the consumption of current limliting modular power is big, efficiency for charge-discharge is very low, and can not apply and need high current fast charge fast
The field put.In the case where the charging not overcurrent of rechargeable battery, the low problem of efficiency for charge-discharge not yet proposes effective at present
Solution.
Summary of the invention
To solve the charging of rechargeable battery present in the relevant technologies not in the case where overcurrent, efficiency for charge-discharge is low to be asked
Topic, the embodiment provides a kind of battery management system BMS and a kind of circuits for battery set charge/discharge.
It may include: at least one electricity An embodiment provides a kind of battery management system BMS, the BMS
Press detection module D, battery management system BMS processor, current limliting module U3, current detection module I and at least one switch S1；
The current limliting module U3 is in parallel with the switch S1, connects after in parallel with the current detection module I；The voltage detecting mould
Block D, for detecting the voltage value of power supply Y1, rechargeable battery set U1；The current detection module I, for circuit where detecting it
Current value；The BMS processor, for control the voltage detection module D, current limliting module U3, current detection module I and
The switch S1.
Further, the voltage detection module D includes first voltage detection unit D1 and second voltage detection unit D2；
Wherein, the first voltage detection unit D1 is used to detect the voltage of the power supply Y1, the second voltage detection unit D2 is used
In the voltage for detecting the rechargeable battery set U1.
Further, the battery management system BMS further includes a switch S2, wherein the switch S2 is opened with described
It is in parallel to close S1, the current limliting module U3.
Further, the battery management system BMS further includes a diode B, wherein the diode B with it is described
Switch S2 series connection, the conducting direction of the diode B are consistent with the current direction in circuit where it.
An embodiment provides a kind of circuit for battery set charge/discharge, the circuit may include: to
A few power supply Y1, at least one rechargeable battery set U1, at least one load equipment RL and at least one battery management system
BMS, wherein the BMS includes at least a voltage detection module D, battery management system BMS processor, current limliting module U3, electricity
Flow detection module I and switch S1；
The power supply Y1 connects with the load equipment RL, wherein the power supply Y1 is load equipment RL power supply；
The current limliting module U3 is in parallel with the switch S1, electric with the current detection module I, the charging after in parallel
Pond group U1 and primary power cource Y1 series connection, wherein the power supply Y1 is rechargeable battery U1 charging, the rechargeable battery
U1 is in the case where the power supply Y1 is powered off group, powers for the load equipment RL；
The voltage detection module D, for detecting the voltage value of the power supply Y1, the rechargeable battery set U1；
The current detection module I, the current value for circuit where detecting it；
The BMS processor, for control the voltage detection module D, current limliting module U3, current detection module I and
The switch S1；
The BMS processor is also used to the voltage value of power supply Y1 described in comparison Yu the rechargeable battery set U1；And root
According to comparison result, controls the current limliting module U3, the switch S1 and charge or discharge are carried out to the rechargeable battery set U1.
Further, the voltage detection module D includes first voltage detection unit D1 and second voltage detection unit D2；
Wherein, the first voltage detection unit D1 is used to detect the voltage of the power supply Y1, the second voltage detection unit D2 is used
In the voltage for detecting the rechargeable battery set U1.
Further, the circuit further includes a switch S2, wherein the switch S2 and the switch S1, the limit
Flow module U3 is in parallel.
Further, the circuit further includes a diode B, wherein and the diode B connects with the switch S2,
The conducting direction of the diode B is consistent with the current direction in circuit where it.
Further, the BMS processor is also used to the voltage in the power supply Y1 and the rechargeable battery set U1
Before value, the switch S2 closure is controlled.
Further, the BMS processor controls the current limliting module U3, the switch S1 to institute according to comparison result
Rechargeable battery set U1 is stated to charge, comprising:
If the difference of the voltage of the power supply Y1 and rechargeable battery set U1 is greater than or equal to preset threshold U0, described
BMS processor controls the switch S1 and disconnects, switch S2 closure, opens current limliting module U3；
Alternatively, if the difference of the voltage of the power supply Y1 and rechargeable battery set U1 is less than preset pressure threshold value U0, institute
It states BMS processor and controls the switch S1 closure, switch S2 disconnection, current limliting module U3 disconnection.
Further, if difference of the BMS processor in the power supply Y1 and the voltage of the rechargeable battery set U1 is small
In preset threshold U0, after controlling the switch S1 closure, the BMS processor is also used to detect charging current value I, and compares
The charging current value I and predetermined current threshold Imax；If the charging current value I is greater than or equal to the predetermined current threshold
Value Imax, the BMS processor control the switch S1 and disconnect, switch S2 closure, open current limliting module U3.
Further, for the BMS processor after opening current limliting module U3, the BMS processor is also used to adjust institute
Current limliting module U3 is stated, with the current value in control loop.
Further, the BMS processor is also used to control the switch S1 in the case where the power supply Y1 is powered off
Closure, the current limliting module U3 are disconnected.
Further, after making the switch S1 closure, the BMS processor is also used in institute the BMS processor
It states in the case that rechargeable battery set U1 completely fills, controls that the switch S1 is disconnected, the switch S2 is closed, the current limliting module U3 breaks
It opens.
Further, the BMS processor is also used to control the switch S1 in the case where the power supply Y1 is powered off
Closure, the switch S2 are disconnected.
Through the invention and embodiment, solve the charging of rechargeable battery present in the relevant technologies not overcurrent the case where
Under, the low problem of efficiency for charge-discharge realizes the rechargeable battery charge and discharge in the case where ensureing the charging not overcurrent of rechargeable battery
Efficiency improves, and has reached the beneficial effect that rechargeable battery safety and efficiency is taken into account.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is one kind of the embodiment of the present invention for battery set charge/discharge circuit diagram one；
Fig. 2 is one kind of the embodiment of the present invention for battery set charge/discharge circuit diagram two；
Fig. 3 is one kind of the embodiment of the present invention for battery set charge/discharge circuit diagram three.
Specific embodiment
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and in combination with Examples.It should be noted that not conflicting
In the case of, the features in the embodiments and the embodiments of the present application can be combined with each other.
An embodiment provides one kind to be used for battery set charge/discharge circuit, Fig. 1 is the embodiment of the present invention
One kind be used for battery set charge/discharge circuit diagram one.As shown in Figure 1, the circuit may include a battery management system.
The BMS may include: at least one voltage detection module D, battery management system BMS processor, current limliting module
U3, current detection module I and at least one switch S1；The current limliting module U3 is in parallel with the switch S1, it is in parallel after with
The current detection module I series connection；The voltage detection module D, for detecting the voltage value of power supply Y1, rechargeable battery set U1；
The current detection module I, the current value for circuit where detecting it；The BMS processor, for controlling the voltage inspection
Survey module D, current limliting module U3, current detection module I and the switch S1.
Optionally, the voltage detection module D includes first voltage detection unit D1 and second voltage detection unit D2；Its
In, the first voltage detection unit D1 is used to detect the voltage of the power supply Y1, the second voltage detection unit D2 is used for
Detect the voltage of the rechargeable battery set U1.
Optionally, the battery management system BMS further includes a switch S2, wherein the switch S2 and the switch
S1, the current limliting module U3 are in parallel.
Optionally, the battery management system BMS further includes a diode B, wherein the diode B is opened with described
S2 series connection is closed, the conducting direction of the diode B is consistent with the current direction in circuit where it.
As shown in Figure 1, the circuit may include:
At least one power supply Y1, at least one rechargeable battery set U1, at least one load equipment RL and at least one electricity
Pond management system BMS, wherein the BMS includes at least a voltage detection module D, battery management system BMS processor, current limliting
Module U3, current detection module I and at least one switch S1；
The power supply Y1 connects with the load equipment RL, wherein the power supply Y1 is load equipment RL power supply；
The current limliting module U3 is in parallel with the switch S1, electric with the current detection module I, the charging after in parallel
Pond group U1 and primary power cource Y1 series connection, wherein the power supply Y1 is rechargeable battery U1 charging, the rechargeable battery
U1 is in the case where the power supply Y1 is powered off group, powers for the load equipment RL；
The voltage detection module D, for detecting the voltage value of the power supply Y1, the rechargeable battery set U1；
The current detection module I, the current value for circuit where detecting it；
The BMS processor, for control the voltage detection module D, current limliting module U3, current detection module I and
The switch S1.
By Fig. 1 battery management system provided and it is used for battery set charge/discharge circuit, can solve and deposit in the related technology
Rechargeable battery charging not overcurrent in the case where, efficiency for charge-discharge low problem realizes and is ensureing that rechargeable battery filling
Not in the case where overcurrent, rechargeable battery efficiency for charge-discharge improves electricity, has reached the beneficial effect that rechargeable battery safety and efficiency is taken into account
Fruit.
Another embodiment of the present invention provides a kind of circuits.It is opened as shown in Fig. 2, the circuit can also include one
Close S2, wherein the switch S2 is in parallel with the switch S1, the current limliting module U3.Optionally, the voltage detection module D
Including first voltage detection unit D1 and second voltage detection unit D2；Wherein, the first voltage detection unit D1 is for examining
Survey the voltage of the power supply Y1, the second voltage detection unit D2 is used to detect the voltage of the rechargeable battery set U1.
Optionally, embodiment additionally provides a kind of embodiment that charge circuit is separated with discharge loop, i.e., the described circuit
It further include a switch S2, wherein the switch S2 is in parallel with the switch S1, the current limliting module U3.
Optionally, embodiment joined protection in discharge loop, i.e. the discharge loop of circuit further includes a diode
B, wherein the diode B connects with the switch S2, the electric current side of the conducting direction of the diode B and circuit where it
To consistent.
Optionally, embodiment is to ensure the safety and maintenance of rechargeable battery set, and BMS processor is also used to described in the comparison
Before the voltage value of the power supply Y1 and rechargeable battery set U1, the switch S2 closure is controlled.
Optionally, for battery pack charging safety not overcurrent, BMS processor in the charge-discharge circuit is according to comparing knot
Fruit controls the current limliting module U3, the switch S1 charges to the rechargeable battery set U1, comprising:
If the difference of the voltage of the power supply Y1 and rechargeable battery set U1 is greater than or equal to preset threshold U0, described
BMS processor controls the switch S1 and disconnects, switch S2 closure, opens current limliting module U3；
Alternatively, if the difference of the voltage of the power supply Y1 and rechargeable battery set U1 is less than preset pressure threshold value U0, institute
It states BMS processor and controls the switch S1 closure, switch S2 disconnection, current limliting module U3 disconnection.
Optionally, in order to ensure the electric current of rechargeable battery set, overcurrent, the circuit do not carry out current monitoring also.The i.e. described BMS
If processor is less than preset threshold U0 in the difference of the power supply Y1 and the voltage of the rechargeable battery set U1, the switch is controlled
After S1 closure, the BMS processor is also used to detect charging current value I, and the charging current value I and default electricity
Flow threshold value Imax；If the charging current value I is greater than or equal to the predetermined current threshold Imax, the BMS processor control
The switch S1 is disconnected, switch S2 closure, is opened current limliting module U3.
Optionally, embodiment additionally provides a kind of preferred embodiment, and the BMS processor is opening current limliting module U3
Later, the BMS processor is also used to adjust the current limliting module U3, with the current value in control loop.
Optionally, embodiment additionally provides a kind of circuit of battery power discharge, i.e., powers to load equipment RL.That is at BMS
Device is managed, is also used in the case where the power supply Y1 is powered off, controls the switch S1 closure, the current limliting module U3 is disconnected.
Optionally, after making the switch S1 closure, the BMS processor is also used to described the BMS processor
In the case that rechargeable battery set U1 completely fills, the switch S1 disconnection is controlled, the switch S2 is closed, the current limliting module U3 is disconnected
It opens.
Optionally, the BMS processor is also used to control the switch S1 in the case where the power supply Y1 is powered off and close
It closes, the switch S2 is disconnected.
It is illustrated below with example.
Example one, battery management system BMS and charge-discharge circuit
Fig. 3 is one kind of the embodiment of the present invention for battery set charge/discharge circuit diagram three.
As shown in figure 3, current limliting module U3 is connected in parallel on the both ends major loop switch S1, switch sections are formed, switch is handled by BMS
Device control.This switch sections and battery pack U1, power supply Y1 are sequentially connected in series battery charge circuit；When power supply Y1 is powered off, this is opened
It closes part and is sequentially connected in series battery discharge circuit with battery pack, load RL.Battery management system (BMS) for voltage, electric current,
The detections such as temperature sampling, and control and manage lithium battery group and reliably and securely run, mainly including but not limited to following
Partially (in dotted line frame): BMS processor U2, main charge switch S1, main discharge switch S2, current limliting module U3, voltage detection module
D1, voltage detection module D2, current detection module D3.
The charging and discharging state of lithium battery group is controlled by circuit switching, and circuit switching is divided into major loop switch and bypass current limliting mould
Block U3 two parts, bypass current limliting module U3 are connected in parallel on major loop switch ends.Wherein, main discharge circuit is by the afterflow for counnter attack
Diode B1 is composed in series with discharge switch S2, and main charge circuit switch S1 is connected in parallel on main discharge circuit both ends, is constituted and is led back
Way switch.S1, S2, current limliting module U3 are controlled by BMS processor in entire circuit switching.This circuit switching part and battery pack
U1, power supply Y1 are sequentially connected in series battery charge circuit；When power supply Y1 is powered off, this switch sections and battery pack, load RL are successively
It is composed in series battery discharge circuit.
In battery charging process, BMS passes through voltage detection module D2 real-time detection to supply voltage Uy, voltage detection module
D1 real-time detection battery voltage Ub arranges threshold value U0, i.e. △ V > U0 when the pressure difference △ V (△ V=Uy-Ub) of Uy and Ub is greater than,
Pressure difference is excessive to have charging overcurrent risk, and BMS control switch S1 is disconnected at this time, S2 is closed, and opens current limliting module U3 work, battery
Group carries out current-limiting charge by the by-pass switch S2 of current limliting module U3, to prevent charging overcurrent.When pressure difference △ V is less than agreement threshold
Value, i.e. △ V < U0, pressure difference is small there is no charging overcurrent risk, and BMS control switch S1 is closed S2 and disconnects at this time, current limliting module U3
It does not work, battery pack is charged by major loop switch S1.If BMS is detected by current divider D3 when in the charging of S1 major loop
Loop current I is more than agreement protection threshold value Imax, i.e. I > Imax, then BMS controls S2 closure, disconnects S1 major loop, opens current limliting
Charging is until the unlatching that is full of or discharges.When power supply Y1 power-off, charging stops, and major loop switch S1 closure is immediately controlled in BMS,
S2 is disconnected, and current limliting module U3 does not work, and opens discharge process.This programme can prevent battery pack charging overcurrent, ensure that simultaneously
Charge efficiency.
Current limliting module and major loop switch in this example one are parallel relationship, can there are two types of charging modes in charging process
Selection.The battery management system BMS is arranged by voltage difference and electric current with it by real-time detection circuit voltage, electric current
Threshold value is compared judgement, and then controls charge switch, reasonably selects in a manner of major loop charging or current-limiting charge, effectively solves
It has determined the flow problem that charged.Meanwhile current limliting module is controlled by BMS and allows to exit charge circuit on suitable opportunity while open
Dynamic major loop charging guarantees the larger current charging in major loop normal range (NR), the charging time is shortened, to solve charging
The problem of low efficiency.This method strategy is simple and reliable, it is easy to accomplish.
In a preferred embodiment, (1) battery anode is connected with positive pole, as common ground.Power supply Y1 and negative
Carrying RL is for describing application scenarios locating for the present invention；Power supply Y1 charges for battery and load supplying, and load RL is practical uses
The equivalent load of electric equipment.
(2) current limliting module U3 is a kind of on-off circuit module, as secondary bypass and major loop charge and discharge switch in parallel.
Current limliting module is including but not limited to current limiting plate, BUCK circuit, BUCK-BOOST circuit etc..It controls current limliting by PWM mode and returns
The on-off of road metal-oxide-semiconductor realizes low current current-limiting charge to control charging current.
(3) voltage detection module D1 detects battery electrode voltage, i.e. battery voltage Ub；Voltage detection module D2 detection
Busbar cathode voltage, i.e. supply voltage Uy；
(4) the current detection module D3 be used for measure loop electric current, i.e. charge or discharge electric current I, including but not limited to
Hall sensor, current divider, resistance detection etc..
(5) battery pack is as backup power source, including but not limited to ferric phosphate lithium cell, ternary lithium battery etc..
(6) described switch S1, S2 can be any controlled switching characteristic component, including but not limited to contact
Device, relay, MOSFET pipe, IGBT etc..
(7) the BMS processor U2 is the key control unit of battery management system BMS, for voltage in detection system,
Electric current, temperature, and the state of control switch S1, S2, current limliting module U3.
(8) the agreement threshold value is control parameter in BMS, and parameter can software setting.
(9) further, the battery electrode is connected with power cathode, using cathode as common ground.
(10) further, the current limliting module solves electric discharge overcurrent for current limliting of discharging.
Example two, the method that charge and discharge are carried out to battery pack using the circuit in example one.
Step 1, BMS processor U2 is calculated and is judged system with the presence or absence of failure or protection alarm before battery charging starts；
If nothing, it is first closed main discharge switch S2, electric discharge major loop is connected, guarantees the ability that can be discharged at any time.Step 2,
BMS passes through voltage detection module D2 real-time detection supply voltage Uy, voltage detection module D1 real-time detection battery voltage Ub；
Step 3, BMS processor U2 is by calculating the pressure difference △ V of Uy and Ub and arranging the size of threshold value U0, to control
Charging modes.
(1) if the pressure difference △ V (△ V=Uy-Ub) of Uy and Ub is greater than agreement threshold value U0, i.e. △ V > U0, the excessive presence of pressure difference
Charge overcurrent risk, and BMS processor U2 control switch S1 is disconnected at this time, opens current limliting module U3, and battery pack passes through bypass current limliting
Module U3 carries out current-limiting charge.Current limliting module U3 is a kind of switching circuit, and BMS processor U2 controls the circuit U3 using PWM mode
The on-off of upper metal-oxide-semiconductor controls current limliting module U3 output size of current by adjusting PWM waveform duty ratio in real time, by current limliting
Current control is in agreement threshold range in circuit, to prevent charging overcurrent.
(2) if pressure difference △ V is less than agreement threshold value U0, i.e. △ V < U0, pressure difference is small, and there is no charging overcurrent risk, BMS processing
Device U2 control switch S1 closure, current limliting module U3 do not start, and battery pack is charged by main charge switch S1.
Step 4, if BMS detects loop current I by current detection module D3, and sentences when in the charging of S1 major loop
Whether disconnected be more than agreement protection threshold value Imax.
If I > Imax, BMS processor U2 controls current limliting module U3 and opens, S1 major loop is disconnected, it is straight to open current-limiting charge
Terminate to electric discharge to open to this charging, is transferred to corresponding discharge condition control.
Step 5, when power supply Y1 power-off, charging stops, and immediately begins to since main discharge switch S2 has been closed electric discharge, BMS
Processor U2 is opened by detecting that busbar voltage Uy and discharge current I determine discharge condition, then major loop is immediately controlled and opens
S1 closure is closed, current limliting module U3 switching signal is disconnected, opens discharge process.
The technical solution of this example two can prevent battery pack charging overcurrent, while ensure that charge efficiency.
Example three, power supply Y1 and load RL are for describing application scenarios locating for the present invention, and battery pack is as stand-by power supply
It is load RL power supply when source is powered off for power supply Y1, the BMS processor is the core of battery management system BMS control and management
Component, the major loop switch and current limliting wired in parallel, switch state are controlled by BMS processor.The method that example three provides can
To include the following steps:
Threshold pressure differential U0, current protection threshold value Imax parameter size is arranged in step 1 in BMS；
Step 2 after BMS processor U2 opening initialization, detects system protection mechanism and failure；
It detects system unprotect and high severity alarm, is closed discharge switch S2, guarantee discharge capability.U2 passes through voltage detecting
Module D2 real-time detection is to supply voltage Uy, voltage detection module D1 real-time detection battery voltage Ub, current detection module D3
Detect real-time current I.
Step 3, BMS processor U2 compare supply voltage and cell voltage pressure difference △ V and preset pressure value；On power supply Y1
Electricity, when opening battery charging, BMS processor U2 calculates in real time and judges supply voltage and cell voltage pressure difference △ V and agreement threshold
Value U0 size, and according to comparison result control switch S1, switch S2, current limliting module working method.
Step 4, when charging is opened, if △ V < U0, BMS processor U2 control switch S1 closure, U3 are disconnected, current limliting module
U3 does not work, and battery pack is charged by major loop switch S1.
Further, BMS processor control current detection module work, real-time detection electric current I protect threshold value with agreement
Imax is compared, and controls charge switch according to comparison result.If in this charging process, BMS processor U2 is detected back
Road electric current I is more than agreement protection threshold value Imax, then BMS controls U3 closure, disconnects S1 major loop, opens current-limiting charge.Alternatively, returning
Road electric current I is more than agreement protection threshold value Imax and continue for the designated time, then BMS controls U3 closure, disconnects S1 major loop, is opened
Current-limiting charge.
Step 5 when charging is opened, if △ V > U0, BMS processor U2 control switch S1 is disconnected, U3 closure, opens current limliting
Module U3 work, battery pack carry out current-limiting charge by current limliting circuit.
After current limliting is opened, BMS processor U2 controls the on-off of metal-oxide-semiconductor on the circuit U3 using PWM mode, then by adjusting in real time
Whole PWM waveform duty ratio exports size of current to control current limliting module U3, by current control in current limliting circuit in agreement threshold value model
In enclosing, to prevent charging overcurrent.
Further, U3 is closed in current-limiting charge, and cell voltage is increased with charging, and pressure difference △ V is gradually reduced therewith,
When being charged to the △ V < U0 moment, BMS processor U2 control switch S1 closure, U3 are disconnected, and current limliting module U3 exits work, battery
Group is charged by major loop switch S1.
Step 6 enters fully charged state when major loop S1 is charged to battery, and BMS processor U2 control switch S1 is disconnected, and is protected
Discharge switch S2 closure is held, into online non-floating charge state.
Online non-floating charge may be implemented in battery, and charge circuit need to be only disconnected when battery completely fills, can prevent battery float,
And do not influence to discharge, it ensure that the discharge loop moment is online.
Step 7, when S1, which disconnects S2 closed system, is in online non-floating charge state, electric discharge, BMS are opened in power supply Y1 power-off
Processor U2 detects that discharge current I is greater than agreement threshold value, then closure switch S1 immediately, guarantees regular picture.
In a preferred embodiment, when battery pack is in current-limiting charge, power supply Y1 is powered off, and charging stops.BMS processing
Major loop switch S1 closure is immediately controlled in device U2, and U3 is disconnected, and current limliting module U3 exits work, opens electric discharge.
Obviously, those skilled in the art should be understood that each module of the above invention or each step can be with general
Computing device realize that they can be concentrated on a single computing device, or be distributed in multiple computing devices and formed
Network on, optionally, they can be realized with the program code that computing device can perform, it is thus possible to which they are stored
It is performed by computing device in the storage device, and in some cases, it can be to be different from shown in sequence execution herein
Out or description the step of, perhaps they are fabricated to each integrated circuit modules or by them multiple modules or
Step is fabricated to single integrated circuit module to realize.In this way, the present invention is not limited to any specific hardware and softwares to combine.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (15)
1. a kind of battery management system BMS characterized by comprising
At least one voltage detection module D, battery management system BMS processor, current limliting module U3, current detection module I and
At least one switch S1；
The current limliting module U3 is in parallel with the switch S1, connects after in parallel with the current detection module I；
The voltage detection module D, for detecting the voltage value of power supply Y1, rechargeable battery set U1；
The current detection module I, the current value for circuit where detecting it；
The BMS processor, for controlling the voltage detection module D, current limliting module U3, current detection module I and described
Switch S1.
2. battery management system BMS according to claim 2, which is characterized in that the voltage detection module D includes first
Voltage detection unit D1 and second voltage detection unit D2；Wherein, the first voltage detection unit D1 is for detecting the electricity
The voltage of source Y1, the second voltage detection unit D2 are used to detect the voltage of the rechargeable battery set U1.
3. battery management system BMS according to claim 1 or 2, which is characterized in that the battery management system BMS is also
Including a switch S2, wherein the switch S2 is in parallel with the switch S1, the current limliting module U3.
4. battery management system BMS according to claim 3, which is characterized in that the battery management system BMS further includes
One diode B, wherein the diode B connects with the switch S2, and the conducting direction of the diode B and its place are returned
The current direction on road is consistent.
5. a kind of circuit for battery set charge/discharge characterized by comprising
At least one power supply Y1, at least one rechargeable battery set U1, at least one load equipment RL and at least one cell tube
Reason system BMS, wherein the BMS includes at least a voltage detection module D, battery management system BMS processor, current limliting module
U3, current detection module I and switch S1；
The power supply Y1 connects with the load equipment RL, wherein the power supply Y1 is load equipment RL power supply；
The current limliting module U3 is in parallel with the switch S1, it is in parallel after with the current detection module I, the rechargeable battery set
U1 and primary power cource Y1 series connection, wherein the power supply Y1 is rechargeable battery U1 charging, the rechargeable battery set U1
In the case where power supply Y1 power-off, power for the load equipment RL；
The voltage detection module D, for detecting the voltage value of the power supply Y1, the rechargeable battery set U1；
The current detection module I, the current value for circuit where detecting it；
The BMS processor, for controlling the voltage detection module D, current limliting module U3, current detection module I and described
Switch S1；
The BMS processor is also used to the voltage value of power supply Y1 described in comparison Yu the rechargeable battery set U1；And according to than
Charge or discharge are carried out to the rechargeable battery set U1 compared with as a result, controlling the current limliting module U3, the switch S1.
6. circuit according to claim 5, which is characterized in that the voltage detection module D includes that first voltage detection is single
First D1 and second voltage detection unit D2；Wherein, the first voltage detection unit D1 be used for detect the power supply Y1 voltage,
The second voltage detection unit D2 is used to detect the voltage of the rechargeable battery set U1.
7. circuit according to claim 5, which is characterized in that the circuit further includes a switch S2, wherein described to open
It is in parallel with the switch S1, the current limliting module U3 to close S2.
8. circuit according to claim 7, which is characterized in that the circuit further includes a diode B, wherein described
Diode B connects with the switch S2, and the conducting direction of the diode B is consistent with the current direction in circuit where it.
9. circuit according to claim 8, which is characterized in that the BMS processor is also used in the power supply Y1
Before the voltage value of the rechargeable battery set U1, the switch S2 closure is controlled.
10. circuit according to claim 8, which is characterized in that the BMS processor is according to comparison result, described in control
Current limliting module U3, the switch S1 charge to the rechargeable battery set U1, comprising:
If the difference of the voltage of the power supply Y1 and the rechargeable battery set U1 is greater than or equal to preset threshold U0, at the BMS
Device is managed to control the switch S1 disconnection, switch S2 closure, open current limliting module U3；
Alternatively,
If the difference of the voltage of the power supply Y1 and rechargeable battery set U1 is less than preset pressure threshold value U0, the BMS processing
Device controls the switch S1 closure, the switch S2 is disconnected, the current limliting module U3 is disconnected.
11. circuit according to claim 10, which is characterized in that if the BMS processor the power supply Y1 with it is described
The difference of the voltage of rechargeable battery set U1 is less than preset threshold U0, after controlling the switch S1 closure,
The BMS processor is also used to detect charging current value I, and the charging current value I and predetermined current threshold
Imax；
If the charging current value I is greater than or equal to the predetermined current threshold Imax, the BMS processor controls the switch
S1 is disconnected, switch S2 closure, is opened current limliting module U3.
12. circuit described in 0 or 11 according to claim 1, which is characterized in that the BMS processor is opening current limliting module U3
Later,
The BMS processor is also used to adjust the current limliting module U3, with the current value in control loop.
13. circuit according to claim 12, which is characterized in that
The BMS processor is also used in the case where the power supply Y1 is powered off, and controls the switch S1 closure, the current limliting
Module U3 is disconnected.
14. circuit according to claim 10, which is characterized in that the BMS processor is closed it in the system switch S1
Afterwards,
The BMS processor is also used in the case where the rechargeable battery set U1 completely fills, and controls the switch S1 disconnection, institute
State switch S2 closure, the current limliting module U3 is disconnected.
15. circuit according to claim 14, which is characterized in that
The BMS processor is also used in the case where the power supply Y1 is powered off, and controls the switch S1 closure, the switch
S2 is disconnected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710558590.3A CN109245189A (en) | 2017-07-10 | 2017-07-10 | A kind of battery management system and a kind of circuit for battery set charge/discharge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710558590.3A CN109245189A (en) | 2017-07-10 | 2017-07-10 | A kind of battery management system and a kind of circuit for battery set charge/discharge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109245189A true CN109245189A (en) | 2019-01-18 |
Family
ID=65083140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710558590.3A Pending CN109245189A (en) | 2017-07-10 | 2017-07-10 | A kind of battery management system and a kind of circuit for battery set charge/discharge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109245189A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110350628A (en) * | 2019-07-30 | 2019-10-18 | 中国联合网络通信集团有限公司 | Battery charging guard method, apparatus and system |
| CN110571888A (en) * | 2019-09-27 | 2019-12-13 | 惠州拓邦电气技术有限公司 | battery pack control method and device and electrical equipment |
| CN110571883A (en) * | 2019-09-10 | 2019-12-13 | 欣旺达电子股份有限公司 | Lithium battery charging current limiting system |
| CN110690752A (en) * | 2019-10-12 | 2020-01-14 | 东莞市峰谷科技有限公司 | BMS management method for multi-battery pack parallel control |
| CN111092471A (en) * | 2019-12-28 | 2020-05-01 | 天津易鼎丰动力科技有限公司 | Use method of overcharge and overdischarge protection circuit for energy storage battery pack |
| WO2020135351A1 (en) * | 2018-12-29 | 2020-07-02 | 中兴通讯股份有限公司 | Charging/discharging apparatus, control method and apparatus, battery apparatus, and storage medium |
| CN111555386A (en) * | 2020-04-30 | 2020-08-18 | 科华恒盛股份有限公司 | Power supply product and power supply's battery charging protection circuit |
| CN112260359A (en) * | 2020-08-27 | 2021-01-22 | 江苏博强新能源科技股份有限公司 | BMS control method, system, electronic equipment and storage medium |
| CN112366799A (en) * | 2020-11-23 | 2021-02-12 | 苏州热工研究院有限公司 | Method and system for rapidly limiting charging impact current of lithium battery |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103311966A (en) * | 2012-03-06 | 2013-09-18 | 北京联动天翼科技有限公司 | Battery self-adaptive control device and method for batteries connected in parallel |
| CN104124728A (en) * | 2013-04-25 | 2014-10-29 | 株式会社杰士汤浅国际 | Electric storage device protection apparatus, electric storage apparatus, and method of protecting electric storage device |
| US20160050998A1 (en) * | 2014-08-19 | 2016-02-25 | Christian G. Hill | Energy attachment for a helmet |
| CN105703415A (en) * | 2014-11-28 | 2016-06-22 | 中国科学院沈阳自动化研究所 | Unmanned helicopter emergency power management system and method |
| CN106169795A (en) * | 2016-09-13 | 2016-11-30 | 沃太能源南通有限公司 | A kind of energy-storage lithium battery group and expansion method thereof |
-
2017
- 2017-07-10 CN CN201710558590.3A patent/CN109245189A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103311966A (en) * | 2012-03-06 | 2013-09-18 | 北京联动天翼科技有限公司 | Battery self-adaptive control device and method for batteries connected in parallel |
| CN104124728A (en) * | 2013-04-25 | 2014-10-29 | 株式会社杰士汤浅国际 | Electric storage device protection apparatus, electric storage apparatus, and method of protecting electric storage device |
| US20160050998A1 (en) * | 2014-08-19 | 2016-02-25 | Christian G. Hill | Energy attachment for a helmet |
| CN105703415A (en) * | 2014-11-28 | 2016-06-22 | 中国科学院沈阳自动化研究所 | Unmanned helicopter emergency power management system and method |
| CN106169795A (en) * | 2016-09-13 | 2016-11-30 | 沃太能源南通有限公司 | A kind of energy-storage lithium battery group and expansion method thereof |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020135351A1 (en) * | 2018-12-29 | 2020-07-02 | 中兴通讯股份有限公司 | Charging/discharging apparatus, control method and apparatus, battery apparatus, and storage medium |
| CN110350628A (en) * | 2019-07-30 | 2019-10-18 | 中国联合网络通信集团有限公司 | Battery charging guard method, apparatus and system |
| CN110571883B (en) * | 2019-09-10 | 2023-05-09 | 欣旺达电子股份有限公司 | Lithium battery charging current limiting system |
| CN110571883A (en) * | 2019-09-10 | 2019-12-13 | 欣旺达电子股份有限公司 | Lithium battery charging current limiting system |
| CN110571888A (en) * | 2019-09-27 | 2019-12-13 | 惠州拓邦电气技术有限公司 | battery pack control method and device and electrical equipment |
| CN110690752A (en) * | 2019-10-12 | 2020-01-14 | 东莞市峰谷科技有限公司 | BMS management method for multi-battery pack parallel control |
| CN110690752B (en) * | 2019-10-12 | 2020-12-29 | 东莞市峰谷科技有限公司 | BMS management method for multi-battery pack parallel control |
| CN111092471A (en) * | 2019-12-28 | 2020-05-01 | 天津易鼎丰动力科技有限公司 | Use method of overcharge and overdischarge protection circuit for energy storage battery pack |
| CN111092471B (en) * | 2019-12-28 | 2023-05-09 | 天津易鼎丰动力科技有限公司 | Using method of overcharge and overdischarge protection circuit for energy storage battery pack |
| CN111555386A (en) * | 2020-04-30 | 2020-08-18 | 科华恒盛股份有限公司 | Power supply product and power supply's battery charging protection circuit |
| CN112260359A (en) * | 2020-08-27 | 2021-01-22 | 江苏博强新能源科技股份有限公司 | BMS control method, system, electronic equipment and storage medium |
| CN112260359B (en) * | 2020-08-27 | 2024-01-09 | 江苏博强新能源科技股份有限公司 | BMS control method, system, electronic equipment and storage medium |
| CN112366799A (en) * | 2020-11-23 | 2021-02-12 | 苏州热工研究院有限公司 | Method and system for rapidly limiting charging impact current of lithium battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109245189A (en) | A kind of battery management system and a kind of circuit for battery set charge/discharge | |
| CN108683202B (en) | Energy storage system | |
| CN111525642B (en) | Low-voltage parallel battery management system and method | |
| CN110707804B (en) | Energy storage and standby power device with online test function and test method | |
| CN107240948A (en) | Portable energy-storing battery charge-discharge control method and system | |
| CN102593905B (en) | Method and circuit for equalized charging of lithium ion battery pack | |
| CN103855748A (en) | Vehicle charging system and method | |
| US9608458B2 (en) | Buck pre-charger for series-connected battery modules | |
| CN216056418U (en) | Electrical system device applied to lithium battery charging and discharging management | |
| CN110932357A (en) | Energy storage device | |
| CN108832686B (en) | Charging circuit and charging circuit detection method | |
| CN109874366A (en) | Motor and equipment | |
| CN106773997A (en) | A kind of auto powering on/off apparatus, method and insert row | |
| CN109342941A (en) | Electric relay detection device and its detection method | |
| CN111682626A (en) | BMS battery management system and management method suitable for energy storage cabinet | |
| CN209675960U (en) | A kind of preliminary filling protective device | |
| CN108011415A (en) | A kind of Power Management Unit chip of integrated battery protection | |
| CN112087017B (en) | Battery management system and battery management method for direct-current power supply of transformer substation | |
| CN211239354U (en) | Main loop control circuit of energy storage equipment | |
| CN104882936A (en) | Communication energy storage power supply system | |
| CN109560585A (en) | Circuit, energy storage device and control method are restarted in a kind of battery over-discharge | |
| CN108448681A (en) | A kind of online method for detecting of the charger of battery management system | |
| CN1126224C (en) | Charging and discharging control circuit and charging type power supply device | |
| CN204761067U (en) | Communication energy storage power supply system | |
| WO2020135351A1 (en) | Charging/discharging apparatus, control method and apparatus, battery apparatus, and storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |