CN205407331U - Group battery intelligent management system suitable for new forms of energy car - Google Patents

Group battery intelligent management system suitable for new forms of energy car Download PDF

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Publication number
CN205407331U
CN205407331U CN201620161070.XU CN201620161070U CN205407331U CN 205407331 U CN205407331 U CN 205407331U CN 201620161070 U CN201620161070 U CN 201620161070U CN 205407331 U CN205407331 U CN 205407331U
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cells
circuit
management system
sampling circuit
effect transistor
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CN201620161070.XU
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江铭
顾东
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Speed Smart Technology (shanghai) Co Ltd
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Speed Smart Technology (shanghai) Co Ltd
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Abstract

The utility model discloses a group battery intelligent management system suitable for new forms of energy car, it includes microcontroller and peripheral circuit, microcontroller connects between the positive negative pole of group battery, the peripheral circuit includes analog front end chip, current sampling circuit, the field effect transistor that discharges, field effect transistor and voltage sampling circuit charge, current sampling circuit, discharge field effect transistor and the field effect transistor that charges establish ties at the negative pole of group battery in proper order, the analog front end chip is connected with positive pole, the current sampling circuit of group battery, discharge field effect transistor and the field effect transistor that charges respectively, voltage sampling circuit connects between each battery and analog front end chip. The utility model provides a group battery intelligent management system has advantages such as circuit structure is simple, the use is nimble, the intellectuality is competent, management function is perfect, battery residual capacity calculation accuracy, can prolong the life of group battery.

Description

A kind of set of cells intelligent management system suitable in new forms of energy car
Technical field
This utility model relates to the management system of a kind of set of cells, particularly relates to a kind of set of cells intelligent management system suitable in new forms of energy car, belongs to technical field of battery management.
Background technology
Along with country to the support energetically of new forms of energy and financial subsidies, it is widely popularized using lithium battery as the new forms of energy car of power energy storage carrier.
But, owing to the performance parameter of lithium battery has significantly non-linear, there is discordance and time dependent characteristic between monomer;Meanwhile, lithium battery is also significantly high to charge-discharge power demand, when overcharge, overdischarge or the situation such as system circuit overcurrent and short circuit occur, can affect the life-span of lithium battery, it is easy to produce spark, burning is even exploded;Further, in use, technique during owing to producing and being not quite similar of material, even if the same batch of battery produced, its capacity, the parameter value such as internal resistance and voltage is also incomplete same for lithium battery;Additionally, increase over time, when charge and discharge cycles is more, each cell performance also gradually forms gap, in set of cells, the battery that in charging process, capacity is minimum enters the state of overcharging in advance, and the battery that during electric discharge, capacity is minimum also can enter the state of putting in advance, so that having influence on the capacity of whole Battery pack, the short-board effect that it has often been said occurs;Further, single battery will influence whether the performance of integral battery door group if there is problem, and whether battery status is normal, it will affects the safe and reliable operation of new forms of energy car;Therefore, in order to avoid the deterioration of this uneven trend, it is ensured that battery performance is good, ensures new forms of energy car traffic safety, it is necessary to set of cells is effectively managed.
Although at present more existing about reports of the management technique of set of cells, but prior art exists that circuit structure complexity, intelligent level be relatively low, management function imperfection, battery remaining power calculating inaccuracy, use the defects such as dumb.
Utility model content
Problem in view of the foregoing defects the prior art has, the purpose of this utility model be to provide a kind of have that circuit structure is simple, intelligent level is high, management perfect in shape and function, battery remaining power calculate accurately, use the set of cells intelligent management system being applicable to new forms of energy car of the advantage such as flexible, to ensure the traffic safety of new forms of energy car and to extend the service life of set of cells.
For achieving the above object, this utility model adopts the following technical scheme that
A kind of set of cells intelligent management system suitable in new forms of energy car, including microcontroller and peripheral circuit, described microcontroller is connected between the both positive and negative polarity of set of cells;Described peripheral circuit includes analog front-end chip, current sampling circuit, electric discharge field-effect transistor, charging field effect transistor and voltage sampling circuit, described current sampling circuit, electric discharge field-effect transistor and charging field effect transistor are sequentially connected in series the negative pole in set of cells, described analog front-end chip is connected with the positive pole of set of cells, current sampling circuit, electric discharge field-effect transistor and charging field effect transistor respectively, and described voltage sampling circuit is connected between each battery and analog front-end chip.
As a kind of embodiment, described peripheral circuit also includes equalizing circuit, and described equalizing circuit is connected with voltage sampling circuit and analog front-end chip respectively, and described equalizing circuit includes balanced MOSFET and equal power resistance.
As a kind of embodiment, described peripheral circuit also includes temperature sampling circuit, and described temperature sampling circuit is connected between each battery and analog front-end chip, and described temperature sampling circuit includes thermal sensitivity semiconductor resistor.
As a kind of embodiment, described peripheral circuit also includes electric power detection chip, and described electric power detection chip is connected with described current sampling circuit, and is connected with described microcontroller by I2C and HDQ one wire system communication interface.
As a kind of embodiment, described peripheral circuit also includes communication chip, and described communication chip is connected with described microcontroller by Phototube Coupling.
As a kind of embodiment, described peripheral circuit also includes set of cells stagnation pressure sample circuit, and described set of cells stagnation pressure sample circuit is connected with microcontroller.
As a kind of embodiment, described peripheral circuit also includes voltage stabilizing chip, and described voltage stabilizing chip is connected between set of cells and described microcontroller.
As a kind of embodiment, described peripheral circuit also includes standby aneroid battery, and described standby aneroid battery is connected with described microcontroller.
Compared to prior art, Advantageous Effects of the present utility model is in that:
The set of cells intelligent management system that this utility model provides utilizes analog front-end chip to achieve how string (going here and there up to 10) set of cells carry out intelligent management; without other protection chips of cascade; not only circuit structure is simple, it is flexible to use, intelligent level is high; and manage perfect in shape and function; battery remaining power calculates accurately; it is applicable to the battery management of new forms of energy car, the traffic safety of new forms of energy car can be ensured and extend the service life of set of cells, there is obvious practical value.
Accompanying drawing explanation
The structural representation of a kind of set of cells intelligent management system suitable in new forms of energy car that Fig. 1 provides for embodiment;
Fig. 2 is the circuit diagram of voltage sampling circuit described in embodiment;
Fig. 3 is the circuit diagram of equalizing circuit described in embodiment;
Fig. 4 is the circuit diagram of current sampling circuit described in embodiment.
Detailed description of the invention
Below in conjunction with drawings and Examples, the technical solution of the utility model is described in further detail.
Embodiment
As shown in Figure 1: a kind of set of cells intelligent management system suitable in new forms of energy car that the present embodiment provides, including microcontroller (MCU) and peripheral circuit, described microcontroller is connected between the both positive and negative polarity of set of cells, described peripheral circuit includes analog front-end chip, current sampling circuit, electric discharge field-effect transistor, charging field effect transistor, voltage sampling circuit, described current sampling circuit, electric discharge field-effect transistor and charging field effect transistor are sequentially connected in series the negative pole in set of cells, described analog front-end chip respectively with the positive pole of set of cells, current sampling circuit, electric discharge field-effect transistor and charging field effect transistor are connected, described voltage sampling circuit is connected between each battery and analog front-end chip.
Described peripheral circuit also includes equalizing circuit, temperature sampling circuit, electric power detection chip, communication chip, voltage stabilizing chip and standby aneroid battery, described equalizing circuit is connected with voltage sampling circuit and analog front-end chip respectively, described temperature sampling circuit is connected between each battery and analog front-end chip, described electric power detection chip is connected with described current sampling circuit, and be connected with described microcontroller by I2C and HDQ one wire system communication interface, described communication chip is connected with described microcontroller by Phototube Coupling, described voltage stabilizing chip is connected between set of cells and described microcontroller, described standby aneroid battery is connected with described microcontroller.
Described microcontroller can be selected for STM32 single-chip microcomputer;Described analog front-end chip can be selected for BQ76930 chip;Described electric power detection chip can be selected for BQ34Z100 chip, and because BQ34Z100 chip can support compensation of ageing, self discharge compensates, and can detect 32A charging and discharging currents;Described communication chip can be selected for MAX485 chip, for management system and PERCOM peripheral communication;Described voltage stabilizing chip can be selected for S1142 chip.
Described microcontroller is directly provided working power by set of cells, owing to whole Battery pack voltage ratio is higher, it is therefore desirable to increase voltage stabilizing chip between the positive pole and microcontroller of set of cells, and assembled battery total voltage is reduced to the 3.3V voltage that microcontroller work is required;When battery bag is idle for a long time or during battery generation overdischarge, in order to prevent battery too much from power consumption, it is possible to switched by the low and high level of the ON/OFF on voltage stabilizing chip, reach to start and stop voltage stabilizing chip operation, thus cutting off whole system power supply, make entrance park mode.
Described standby aneroid battery can when set of cells generation abnormal conditions, for system power supply;When being connected to standby aneroid battery and VCC power supply (i.e. set of cells) when management system, VCC power supply will be selected to power simultaneously;When there is no VCC power supply, standby dry cell power supply will be selected;When the abnormal conditions such as battery short circuit or mistake stream occur, in order to cell safety considers, management system then enters lock-out state, namely can not discharge.
As shown in Figure 2: described voltage sampling circuit is connected between each battery (battery core) and analog front-end chip, after gathering the voltage of each battery respectively and carrying out RC filtering, input analog front-end chip obtains for microcontroller;Analog front-end chip BQ76930pin foot is directly inputted, to monitor each battery core voltage in real time after each battery core RC filtering;Carrying 14 ADC in BQ76930 chip, packet is scanned measuring, each group of continuous five lattice (VC1 to VC5, VC6 to VC10);Scan period is 250 milliseconds, and microcontroller can directly read the value of ADC depositor by I2C interface, converts, thus obtaining the cell voltage of reality.
As shown in Figure 3: described equalizing circuit includes balanced MOSFET and equal power resistance;Described BQ76930 chip has battery balanced control port, for balanced each battery, improves the whole Battery pack life-span, makes each cell voltage keep consistent as far as possible.Aligned sample is passive balanced way, if monomer battery voltage exceeds certain value than other batteries, is switched on balanced MOSFET, and such battery starts electric discharge by equal power resistance, when cell voltage keeps consistent with other batteries, stops equilibrium.Battery status is detected for more good utilisation microcontroller, make corresponding action, it is necessary to allow microcontroller collect the global voltage of battery, therefore, described peripheral circuit also includes set of cells stagnation pressure sample circuit (not shown), and the total voltage to gather set of cells is defeated by microcontroller.
As shown in Figure 4: the realization of described current sampling circuit 3, mainly by Series power resistance between set of cells and analog front-end chip, carrys out calculating current size by resistance drop.Because BQ76930 chip internal carries the integrated ADC of 16, by current sense resistor stored charge, integration period is 250 milliseconds, and microcontroller either directly through the value reading ADC depositor, can convert, thus obtaining the charging and discharging currents of reality.Electric discharge field-effect transistor (DSG) and charging field effect transistor (CHG) are sequentially connected in series after current sampling circuit; when battery occur overcharging, cross put time, analog front-end chip drives electric discharge field-effect transistor (DSG) and charging field effect transistor (CHG) is charged, discharge prevention.
Temperature sampling circuit can prevent battery excess temperature, and described temperature sampling can adopt critesistor, and because critesistor is a kind of thermal sensitivity semiconductor resistor, its resistance can decline with the rising of temperature, therefore that variations in temperature is sensitive, safe and reliable, and cost is low.Because being equipped with the NTC thermistor interface of two-way 10k Ω outside BQ76930 chip, the integrated ADC of 14 therefore can be passed through, to realize detecting in real time battery temperature.
The set of cells intelligent management system being applicable to new forms of energy car that this utility model provides can realize following functions:
1, data acquisition, including monomer battery voltage, battery voltage, charging and discharging currents and temperature;
2, battery balanced, produce pressure reduction between monomer battery core, it is carried out equilibrium;
3, protection circuit, when battery occur overcharging, cross put, cross stream, excess temperature and short circuit phenomenon time, cut off discharge and recharge, protect;
4, the residual capacity measurement of set of cells;
5, communication function, carries out data communication by RS485 with external system.
Finally be necessary it is pointed out here that: the foregoing is only this utility model preferably detailed description of the invention; but protection domain of the present utility model is not limited thereto; any those familiar with the art is in the technical scope that this utility model discloses; the change that can readily occur in or replacement, all should be encompassed within protection domain of the present utility model.

Claims (10)

1. being applicable to a set of cells intelligent management system for new forms of energy car, including microcontroller and peripheral circuit, described microcontroller is connected between the both positive and negative polarity of set of cells;It is characterized in that: described peripheral circuit includes analog front-end chip, current sampling circuit, electric discharge field-effect transistor, charging field effect transistor and voltage sampling circuit, described current sampling circuit, electric discharge field-effect transistor and charging field effect transistor are sequentially connected in series the negative pole in set of cells, described analog front-end chip is connected with the positive pole of set of cells, current sampling circuit, electric discharge field-effect transistor and charging field effect transistor respectively, and described voltage sampling circuit is connected between each battery and analog front-end chip.
2. set of cells intelligent management system according to claim 1, it is characterised in that: described peripheral circuit also includes equalizing circuit, and described equalizing circuit is connected with voltage sampling circuit and analog front-end chip respectively.
3. set of cells intelligent management system according to claim 2, it is characterised in that: described equalizing circuit includes balanced MOSFET and equal power resistance.
4. set of cells intelligent management system according to claim 1, it is characterised in that: described peripheral circuit also includes temperature sampling circuit, and described temperature sampling circuit is connected between each battery and analog front-end chip.
5. set of cells intelligent management system according to claim 4, it is characterised in that: described temperature sampling circuit includes thermal sensitivity semiconductor resistor.
6. set of cells intelligent management system according to claim 1, it is characterized in that: described peripheral circuit also includes electric power detection chip, described electric power detection chip is connected with described current sampling circuit, and is connected with described microcontroller by I2C and HDQ one wire system communication interface.
7. set of cells intelligent management system according to claim 1, it is characterised in that: described peripheral circuit also includes communication chip, and described communication chip is connected with described microcontroller by Phototube Coupling.
8. set of cells intelligent management system according to claim 1, it is characterised in that: described peripheral circuit also includes set of cells stagnation pressure sample circuit, and described set of cells stagnation pressure sample circuit is connected with described microcontroller.
9. set of cells intelligent management system according to claim 1, it is characterised in that: described peripheral circuit also includes voltage stabilizing chip, and described voltage stabilizing chip is connected between set of cells and described microcontroller.
10. set of cells intelligent management system according to claim 1, it is characterised in that: described peripheral circuit also includes standby aneroid battery, and described standby aneroid battery is connected with described microcontroller.
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107132482A (en) * 2017-04-26 2017-09-05 淮阴师范学院 A kind of new energy car battery state monitor
CN109742459A (en) * 2018-12-20 2019-05-10 中国电子科技集团公司第四十八研究所 A kind of lithium battery management system of unmanned plane quick charge
CN109950947A (en) * 2019-02-15 2019-06-28 南京航空航天大学 Battery management system based on STM32
CN110361655A (en) * 2019-07-12 2019-10-22 深圳六滴科技有限公司 A kind of battery electric quantity remote detection monitoring method
CN110361656A (en) * 2019-07-12 2019-10-22 深圳六滴科技有限公司 A kind of battery electric quantity remote Inspection and monitoring system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107132482A (en) * 2017-04-26 2017-09-05 淮阴师范学院 A kind of new energy car battery state monitor
CN109742459A (en) * 2018-12-20 2019-05-10 中国电子科技集团公司第四十八研究所 A kind of lithium battery management system of unmanned plane quick charge
CN109742459B (en) * 2018-12-20 2021-12-14 中国电子科技集团公司第四十八研究所 Lithium battery management system for rapid charging of unmanned aerial vehicle
CN109950947A (en) * 2019-02-15 2019-06-28 南京航空航天大学 Battery management system based on STM32
CN110361655A (en) * 2019-07-12 2019-10-22 深圳六滴科技有限公司 A kind of battery electric quantity remote detection monitoring method
CN110361656A (en) * 2019-07-12 2019-10-22 深圳六滴科技有限公司 A kind of battery electric quantity remote Inspection and monitoring system

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PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of utility model: Group battery intelligent management system suitable for new forms of energy car

Effective date of registration: 20190822

Granted publication date: 20160727

Pledgee: Nanjing Sanye Golden Eagle Motorcycle Co., Ltd.

Pledgor: Speed smart technology (Shanghai) Co., Ltd.

Registration number: Y2019320000073

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Date of cancellation: 20200702

Granted publication date: 20160727

Pledgee: NANJING SANYE GOLDEN EAGLE MOTORCYCLE Co.,Ltd.

Pledgor: SOCO INTELLIGENT TECHNOLOGY (SHANGHAI) Co.,Ltd.

Registration number: Y2019320000073

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Denomination of utility model: Group battery intelligent management system suitable for new forms of energy car

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Granted publication date: 20160727

Pledgee: Nanjing ruimo Suke Intelligent Technology Co., Ltd

Pledgor: SOCO INTELLIGENT TECHNOLOGY (SHANGHAI) Co.,Ltd.

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