CN205960720U - Charge protection circuit and use battery system and motor vehicle of this circuit - Google Patents
Charge protection circuit and use battery system and motor vehicle of this circuit Download PDFInfo
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- CN205960720U CN205960720U CN201620901562.8U CN201620901562U CN205960720U CN 205960720 U CN205960720 U CN 205960720U CN 201620901562 U CN201620901562 U CN 201620901562U CN 205960720 U CN205960720 U CN 205960720U
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- branch road
- secondary battery
- battery unit
- thermistor
- resistance
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Abstract
The utility model relates to a charge protection circuit and use battery system and motor vehicle of this circuit, the utility model discloses a charge protection circuit includes a balanced branch road of control, it is used for that to hold cell parallelly connected with each to monitor balanced branch road, be equipped with at least one bypass component in monitoring balanced branch road, and does not set up switch element, the bypass component is the component of resistance when both ends voltage reaches the voltage threshold of settlement or equivalent resistance reduction, the bypass component is zener diode or piezo -resistor, the charge protection circuit still includes a positive temperature coefficient's thermistor, thermistor is used for and holds cell and establish ties, the series branch of formation with it is parallelly connected to monitor balanced branch road. Through this charge protection circuit simplified the circuit, practiced thrift the cost, make storage battery charging protection method realizes more easily, and the effectual mistake of having avoided the battery is filled, is overflowed, the excess temperature.
Description
Technical field
The utility model belongs to battery field, the battery particularly to a kind of charge protector and using this circuit
System and motor vehicle.
Background technology
With the continuous development of lithium-ions battery technology, its application is constantly expanded, including personal consumption electrical type
Product, new-energy automobile, communication system back-up source etc..Lithium-ions battery has with respect to traditional lead-acid accumulator no to be remembered
Recall effect, energy density is high, have extended cycle life, power density is big, environment friendly and pollution-free many advantages, such as.On the contrary, lithium ion stores
One of battery major defect is poor to overcharging resisting ability.
Existing battery system, often has dozens of unit battery to pass through in series.Specifically for new energy vehicle,
May be in series by up to a hundred unit batteries.In the case of such an application it is necessary to force to avoid overcharging the generation of phenomenon, because
Thermal runaway for individual unit battery may trigger the cascade reaction of whole battery system, produces serious security incident.
Notification number is that the documents of CN102903981A disclose vehicle battery and its charging method, in documents
Multiple monomer balanced balanced current paths are connected with corresponding secondary battery unit respectively, and can be when its voltage exceedes certain maximum
So that corresponding monomer bypass or bypass, the secondary battery unit of overcharge is bypassed or while bypass to not full charge of storage
Battery cell charges.
Monomer balanced balanced current path in documents includes electronic switch and the Zener diode assembly being connected in series, its
Middle electronic switch is used for enabling or disabling monomer balanced balanced current path by storage cell control module control, described electronic switch,
It is opened when single battery is experiencing electronic switch when generation exceedes certain threshold value, monomer balanced balanced current path is disabled,
When the voltage on single battery exceedes certain threshold value, switch control rule letter is sent to electronic switch from storage cell control module
Number, thus closing immediately and connecting monomer balanced balanced current path.Due to employing controlled system operatio in control process
Electronic switch, therefore, the realization of control process has to rely on the functions such as corresponding collection, process and driving, controls system accordingly
System is complex；Each monomer balanced balanced current path also needs to a upper electronic switch of connecting, a fairly large number of in battery cell
In the case of, tie point is more, easily produces wiring faults.
Utility model content
The purpose of this utility model is to provide a kind of charge protector, realizes charge balancing for solving prior art
The problem of wiring and control system complexity during protection；Enable charging process and the better simply reality of balancing procedure of battery
Existing, and it is prevented from overcharging of battery.
For realizing the problems referred to above, the technical solution of the utility model is：
A kind of charge protector, this circuit includes a monitoring equilibrium branch road, described monitoring equilibrium branch road be used for every
One secondary battery unit parallel connection, is provided with least one bypass elements in described monitoring equilibrium branch road, and is not provided with switch element, institute
State the element that bypass elements are resistance or equivalent resistance reduction when both end voltage reaches the voltage threshold of setting.
Further, described bypass elements are Zener diode or piezo-resistance.
Further, described charge protector also includes the thermistor of described positive temperature coefficient, and described temperature-sensitive is electric
Hinder for connecting with secondary battery unit, the series arm of formation and described monitoring Jun Heng branch circuit parallel connection.
The utility model additionally provides a kind of battery system using this circuit.
The utility model provides a kind of motor vehicle using this battery system again.
Effect of the present utility model：
Charge protector of the present utility model, does not have switch or electronic switch, without logical in its monitoring equilibrium branch road
Cross controller to control its shutoff, as long as the voltage of secondary battery unit exceedes the voltage threshold of setting, described monitoring equilibrium is propped up
The effect of shunting will be played in road, simplifies circuit, has saved cost.
Bypass elements are Zener diode or piezo-resistance, during for example with Zener diode, when on secondary battery unit
Voltage exceed described setting voltage threshold when, described Zener diode punctures, and equivalent resistance reduces so that charging current
Flow mostly through described monitoring equilibrium branch road, to form bypass circuit, play the effect of shunting so that will not on secondary battery unit
Overvoltage occurs, thus stablizing the voltage at secondary battery unit two ends.
When the electric current flowing through unit battery or its temperature exceed the threshold value of setting, the resistance of described thermistor will
Increase, to stop, excessive electric current continues to flow through unit battery or temperature continues to raise, and each secondary battery unit is carried out
Protection when excessively stream and charging temperature are too high.And described thermistor has self-recovering function, in excessively stream or excess temperature fault row
After removing, its resistance value can recover normal, makes secondary battery unit recover normal charging/discharging function.
Brief description
Fig. 1 is battery system unit battery charge graph of the present utility model；
Fig. 2 is battery system charging stage schematic diagram of the present utility model；
Fig. 3 is battery system individual unit battery equalisation stage schematic diagram of the present utility model；
Fig. 4 is battery system individual unit battery equalisation monitoring balancing element V/A figure of the present utility model；
Fig. 5 is battery system of the present utility model multiple unit battery equalisation stage schematic diagram；
Fig. 6 is battery system of the present utility model whole unit battery equalisation stage schematic diagram (charging terminates).
Specific embodiment
A kind of embodiment of battery system of the present utility model：
A kind of battery system, including the secondary battery unit of several series connection, also includes charge protector, this circuit bag
Include a monitoring equilibrium branch road, described monitoring equilibrium branch road is used for, described monitoring equilibrium in parallel with each secondary battery unit
It is provided with least one bypass elements in road, and is not provided with switch element, described bypass elements are to reach setting in both end voltage
The element of resistance or equivalent resistance reduction during voltage threshold.
Described charge protector also includes the thermistor of a positive temperature coefficient, and thermistor is used for and battery
Unit series connection, the series arm of formation and the Jun Heng branch circuit parallel connection of described monitoring.
Specifically, bypass elements adopt Zener diode or piezo-resistance, or the combination of Zener diode and piezo-resistance,
It is introduced below taking Zener diode as a example.As shown in the figure：
Operation principle with reference to charging process battery system to the present embodiment is introduced.
Charge to multiple secondary battery units, in charging process, due to the performance difference between each secondary battery unit, because
This, each secondary battery unit will reach the voltage threshold of setting in the different moment.As a secondary battery unit such as B1, on B2, B3
Voltage be not above set voltage threshold when, Zener diode D1, D2, D3 stop charging current flow through monitoring equilibrium electricity
Road, now charges to secondary battery unit, i.e. charging process as shown in Figure 2.When the electric power storage as shown in Figure 3 of a secondary battery unit
When voltage on pool unit B2 exceedes the voltage threshold of setting, that is, as Fig. 1, shown 4.2V, now reach Zener diode
The breakdown voltage of D2, the resistance value of Zener diode declines rapidly, and the charging current of this secondary battery unit is flow through in suppression, is formed other
Road circuit, makes most of electric current flow through bypass circuit.
The design of above-mentioned voltage threshold, can select is the voltage that a secondary battery unit reaches 100% charged state, because
This, the major part making charging current is bypassed the secondary battery unit with nearly 100% charged state by Zener diode bypass,
Thus the secondary battery unit with nearly 100% charged state will stop charging it is achieved that the charging of each secondary battery unit is equal
Weighing apparatus.
With the carrying out charged, charging current continues as in battery system the battery that other have relatively low charged state
Unit is charged, and increasing secondary battery unit is bypassed by their corresponding monitoring equilibrium branch roads, until all of electric power storage
Pool unit all reaches 100% charged state.Be not in overvoltage therefore in each secondary battery unit.
Additionally, when the temperature of the current threshold or unit battery that exceed setting by the electric current of unit battery exceedes
During the temperature threshold setting, the resistance of described thermistor R1 or R2 or R3 with current value or circuit be short-circuited fault when
The rising of the temperature value causing and increase, that is, as shown in Figure 2.Battery system open circuit suspends energy transmission, excessive to stop
Electric current continues to flow through unit battery and secondary battery unit temperature continues to raise.After described excessively stream or short trouble release,
The resistance of described thermistor recovers normal, and described battery carries out normal charging/discharging function.
Even heat in charging process is distributed on unit battery monitoring equilibrium branch road in parallel, can be effective
Avoid the even situation of temperature distributing disproportionation in battery system, and the charging process of battery system is same with charge balancing process
Shi Jinhang, shortens the charging interval.
A kind of embodiment of charge protector of the present utility model：
Because the charge protector in the present embodiment is identical with the charge protector in above-described embodiment, so
Here no longer describe in detail.
A kind of embodiment of the motor vehicle using this battery system：
Motor vehicle includes body part and battery system, and battery system is complete with the battery system in above-described embodiment
Exactly the same, so no longer describing in detail here.
Claims (9)
1. a kind of charge protector it is characterised in that：This circuit includes a monitoring equilibrium branch road, and described monitoring equalizes branch road
For in parallel with each secondary battery unit, it is provided with least one bypass elements in described monitoring equilibrium branch road, and is not provided with out
Close element, described bypass elements are the element of resistance or equivalent resistance reduction when both end voltage reaches the voltage threshold of setting.
2. a kind of charge protector according to claim 1 it is characterised in that：Described bypass elements are Zener diode
Or piezo-resistance.
3. a kind of charge protector according to claim 1 it is characterised in that：Described charge protector also includes
The thermistor of one positive temperature coefficient, described thermistor is used for connecting with secondary battery unit, the series arm of formation and institute
State monitoring equilibrium branch circuit parallel connection.
4. a kind of battery system, including several series connection secondary battery unit it is characterised in that：Also include charge protection electricity
Road, this circuit includes a monitoring equilibrium branch road, and described monitoring equilibrium branch road is in parallel with each secondary battery unit, described
It is provided with least one bypass elements in monitoring equilibrium branch road, and is not provided with switch element, described bypass elements are in both end voltage
Reach setting voltage threshold when resistance or equivalent resistance reduce element.
5. a kind of battery system according to claim 4 it is characterised in that：Described bypass elements be Zener diode or
Person's piezo-resistance.
6. a kind of battery system according to claim 4 it is characterised in that：Described charge protector also includes one
The thermistor of individual positive temperature coefficient, described thermistor is connected with a secondary battery unit, the series arm of formation with described
Monitoring equilibrium branch circuit parallel connection.
7. a kind of motor vehicle, including car body, and the battery system that the secondary battery unit of several series connection is constituted, its feature exists
In：Described secondary battery unit includes charge protector, and this circuit includes a monitoring equilibrium branch road, and described monitoring equalizes branch road
For in parallel with each secondary battery unit, it is provided with least one bypass elements in described monitoring equilibrium branch road, and is not provided with out
Close element, described bypass elements are the element of resistance or equivalent resistance reduction when both end voltage reaches the voltage threshold of setting.
8. a kind of motor vehicle according to claim 7 it is characterised in that：Described bypass elements are Zener diode or pressure
Quick resistance.
9. a kind of motor vehicle according to claim 7 it is characterised in that：Described charge protector is just also including one
The thermistor of temperature coefficient, described thermistor is used for connect with secondary battery unit, the series arm of formation and described monitoring
Equilibrium branch circuit parallel connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620901562.8U CN205960720U (en) | 2016-08-18 | 2016-08-18 | Charge protection circuit and use battery system and motor vehicle of this circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620901562.8U CN205960720U (en) | 2016-08-18 | 2016-08-18 | Charge protection circuit and use battery system and motor vehicle of this circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205960720U true CN205960720U (en) | 2017-02-15 |
Family
ID=57976346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620901562.8U Active CN205960720U (en) | 2016-08-18 | 2016-08-18 | Charge protection circuit and use battery system and motor vehicle of this circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205960720U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106130132A (en) * | 2016-08-18 | 2016-11-16 | 郑州宇通客车股份有限公司 | Charging protection circuit for storage battery and use battery system and the motor vehicles of this circuit |
| CN109660363A (en) * | 2018-12-13 | 2019-04-19 | 成都芯源系统有限公司 | battery unit cascade system and differential communication interface |
| CN110015130A (en) * | 2017-08-31 | 2019-07-16 | 比亚迪股份有限公司 | Battery equalization system, vehicle, battery equalization method and storage medium |
| CN114243834A (en) * | 2021-12-16 | 2022-03-25 | 湖北襄开电力设备有限公司 | Battery charging protection method and device |
-
2016
- 2016-08-18 CN CN201620901562.8U patent/CN205960720U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106130132A (en) * | 2016-08-18 | 2016-11-16 | 郑州宇通客车股份有限公司 | Charging protection circuit for storage battery and use battery system and the motor vehicles of this circuit |
| CN110015130A (en) * | 2017-08-31 | 2019-07-16 | 比亚迪股份有限公司 | Battery equalization system, vehicle, battery equalization method and storage medium |
| CN109660363A (en) * | 2018-12-13 | 2019-04-19 | 成都芯源系统有限公司 | battery unit cascade system and differential communication interface |
| CN109660363B (en) * | 2018-12-13 | 2021-04-13 | 成都芯源系统有限公司 | Battery unit cascade system and differential communication interface |
| CN114243834A (en) * | 2021-12-16 | 2022-03-25 | 湖北襄开电力设备有限公司 | Battery charging protection method and device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 450061 Yudao Road, Guancheng District, Zhengzhou City, Henan Province Patentee after: Yutong Bus Co.,Ltd. Address before: 450016 Yutong Industrial Zone, eighteen Li River, Henan, Zhengzhou Patentee before: ZHENGZHOU YUTONG BUS Co.,Ltd. |