CN204188776U - A kind of multifunctional motor-driven automobile batteries management system - Google Patents
A kind of multifunctional motor-driven automobile batteries management system Download PDFInfo
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- CN204188776U CN204188776U CN201420562072.0U CN201420562072U CN204188776U CN 204188776 U CN204188776 U CN 204188776U CN 201420562072 U CN201420562072 U CN 201420562072U CN 204188776 U CN204188776 U CN 204188776U
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Abstract
The utility model discloses a kind of multifunctional motor-driven automobile batteries management system, comprise digital signal processor (10), protection circuit (20), sampling hold circuit (30), second-order filter circuit (40), voltage sampling circuit (51), current sampling circuit (52), battery temperature sample circuit (53), environment temperature sample circuit (54), voltage sampling circuit is connected with second-order filter circuit with current sampling circuit, second-order filter circuit is connected with sampling hold circuit, sampling hold circuit is connected with protection circuit, battery temperature sample circuit is connected with protection circuit with environment temperature sample circuit, protection circuit is connected with digital signal processor.By technical scheme described in the utility model, the voltage of battery and electric battery, electric current and temperature data can be collected accurately, and ambient temperature data, and calculate battery dump energy, judge the security of battery.
Description
Technical field:
The utility model relates to electric vehicle engineering field, in particular to a kind of multifunctional motor-driven automobile batteries management system.
Background technology:
Electric automobile is owing to not only saving the energy but also environmental pollution more and more causes the attention of a lot of country less.And on-vehicle battery system is the key component that electric motor car runs, so vehicle mounted battery management system just seems very important.How to collect the various data of battery and electric battery accurately, calculate its dump energy, make battery operated in optimum condition, effectively, utilize the energy of battery fully, improve battery life, to the fault of battery, agingly carry out early prediction and warning, prevent the fault due to certain battery from not making in time process and cause the damage of the even whole electric motor car of electric battery, thus reduce the cost of electric motor car, improve the security that electric motor car runs, improve the efficiency of system.So the research of vehicle mounted battery management system is trend of the times.
Summary of the invention:
The technical matters that the utility model solves: the various data how collecting battery and electric battery accurately, as voltage, electric current, temperature, calculates its dump energy, and monitoring of environmental temperature.
The utility model provides following technical scheme: a kind of multifunctional motor-driven automobile batteries management system, comprises digital signal processor, protection circuit, sampling hold circuit, second-order filter circuit, voltage sampling circuit, current sampling circuit.Described multifunctional motor-driven automobile batteries management system also comprises battery temperature sample circuit and environment temperature sample circuit.Described voltage sampling circuit is connected with second-order filter circuit with current sampling circuit; described second-order filter circuit is connected with sampling hold circuit; described sampling hold circuit is connected with protection circuit; described battery temperature sample circuit is connected with protection circuit respectively with environment temperature sample circuit, and described protection circuit is connected with digital signal processor.
The most important task that will complete of battery management system is exactly estimate the residual capacity of battery, and carrying out estimation to the residual capacity of battery has a lot of method, and prior art generally adopts Kalman filtering algorithm.The method is the battery dynamic parameter according to collecting, and sets up the Order RC model of accumulator, then utilizes the SOC of Kalman filtering algorithm to accumulator to estimate.The method will battery as a dynamic system, and the SOC value of battery is a variable of system.This system has output variable and input variable, and input variable has electric current and temperature, and output variable is voltage.The method is current application method the most widely, because it is suitable for any battery, the on-vehicle battery that the fluctuation for charging and discharging electric current is large, the SOC value error estimated is less, so applicability is stronger.
For realizing above-mentioned Kalman filtering algorithm, the utility model provides technique scheme.In order to ensure the electric current and the voltage that sample battery synchronization, the utility model adds a sampling hold circuit, and this circuit is connected with DSP by protection circuit, is connected with sample circuit by second-order filter circuit.The effect of the second-order filter circuit in the utility model is that sampling by filtration arrives to obtain electric current and voltage, thus ensures precision and the accuracy of electric current and voltage, thus eliminating the need the impact on electric current and voltage of electromagnetic interference (EMI) in automobile.In order to the real-time temperature of electrolytic cell and environment, need battery temperature Acquisition Circuit and temperature collection circuit, the data collected are used to judge battery whether safety.All data relevant with battery that are that collect and information all will enter by the AD port of dsp chip calculating and the analysis that data are carried out in its inside then above.By technical scheme described in the utility model, voltage, the current data of battery and electric battery can be collected accurately, calculate its dump energy, and monitor battery and environment temperature to judge battery whether safety.
Further illustrate as of the present utility model, described battery temperature sample circuit comprises resistance one, resistance two, resistance three, thermistor, electric capacity one, electric capacity two, electric capacity three, electric capacity four, operational amplifier one, operational amplifier two, described resistance one and resistance two are connected, described resistance three and thermistor series connection, described resistance one and resistance two in parallel with resistance three and thermistor, described electric capacity one and electric capacity three in parallel with resistance one, described electric capacity two and electric capacity four in parallel with thermistor, described resistance one is connected with the negative input end of operational amplifier one with resistance two junction, described resistance three is connected with the positive input terminal of thermistor junction with operational amplifier two, the output terminal of described operational amplifier one is connected with the negative input end of operational amplifier two, one end ground connection of described thermistor.As preferably, described thermistor is posistor.
Further illustrate as of the present utility model, described environment temperature sample circuit comprises integrated temperature sensor, operational amplifier, NPN type triode one, NPN type triode two, resistance, variable resistor, described integrated temperature sensor one end is connected with the negative input end of operational amplifier, described integrated temperature sensor outer meeting resistance, described variable resistor is connected with the positive input terminal of operational amplifier, the output terminal of described operational amplifier is connected with the base stage of NPN type triode one, and the emitter of described NPN type triode one is connected with the base stage of NPN type triode two.Wherein, described integrated temperature sensor comprises temperature-sensitive or temperature sensing element, temperature compensation part and amplifier section.
Further illustrate as of the present utility model, described voltage sampling circuit is connected with second-order filter and sampling hold circuit by analog switch, and described analog switch is two 16 path analoging switch.The pure electric automobile that the utility model is studied, includes 24 fast lead accumulators, because the A/D port of dsp chip is few, so need to add analog switch to realize the detection to 24 road batteries.
Further illustrate as of the present utility model, described multifunctional motor-driven automobile batteries management system also comprises liquid crystal display, the keyboard be connected with liquid crystal display, the safety switch be connected with digital signal processor, the erasable and programable memory that is connected with digital signal processor.In order to make the information of display more comprehensive, it is convenient to observe, liquid crystal display not only will show letter and data, Chinese character and symbol also need to show, and so multi information can not show in one page, so also need keyboard to carry out switch window, and keyboard also has other effect, mainly controls the startup of battery charging and the switching of stopping.Described liquid crystal display is connected with digital signal processor by CAN bus.In order to ensure the safety of battery and electric motor car, need to add a safety switch, when electric battery occurs that serious problems are, cut-off switch, so electric battery and load are just disconnected, thus protects battery and automobile at once.Applicant considers and can carry out performance analysis to the whole life cycle of electric battery, and utility model employs erasable and programable memory EEPROM, records the data of each discharge and recharge.
Accompanying drawing illustrates:
Below in conjunction with accompanying drawing, the utility model is described further:
Fig. 1 is the block diagram of a kind of multifunctional motor-driven automobile batteries of the utility model management system;
Fig. 2 is battery temperature sample circuit figure in Fig. 1;
Fig. 3 is environment temperature sample circuit figure in Fig. 1.
Symbol description in figure:
10-digital signal processor;
20-protection circuit;
30-sampling hold circuit;
40-second-order filter circuit;
51-voltage sampling circuit; 52-current sampling circuit; 53-battery temperature sample circuit; 54-environment temperature sample circuit;
60-analog switch;
70-liquid crystal display; 71-keyboard;
80-safety switch;
90-erasable and programable memory;
AR1-operational amplifier; AR2-operational amplifier; AR-operational amplifier;
AN-integrated temperature sensor;
C1-electric capacity; C2-electric capacity; C3-electric capacity; C4-electric capacity;
R1-resistance; R2-resistance; R3-resistance; RD-thermistor; Rb-resistance; Rp-variable resistor;
VT1-NPN type triode; VT2-NPN type triode.
Embodiment:
As shown in Figure 1, a kind of multifunctional motor-driven automobile batteries management system, comprise digital signal processor 10, protection circuit 20, sampling hold circuit 30, second-order filter circuit 40, voltage sampling circuit 51, current sampling circuit 52, battery temperature sample circuit 53, environment temperature sample circuit 54, described voltage sampling circuit 51 is connected with second-order filter circuit 40 with current sampling circuit 52, described second-order filter circuit 40 is connected with sampling hold circuit 30, described sampling hold circuit 30 is connected with protection circuit 20, described battery temperature sample circuit 53 is connected with protection circuit 20 respectively with environment temperature sample circuit 54, described protection circuit 20 is connected with digital signal processor 10.Wherein, described voltage sampling circuit 51 is connected with second-order filter circuit 40 by analog switch 60, and described analog switch 60 is two 16 path analoging switch, and model is CD4067.What the operational amplifier in described second-order filter circuit 40 circuit adopted is TL028A model.
As shown in Figure 1, described cell management system of electric automobile also comprises liquid crystal display 70, the keyboard 71 be connected with liquid crystal display 70, the safety switch 80 be connected with digital signal processor 10, the erasable and programable memory 90 that is connected with digital signal processor 10, and described liquid crystal display 70 is connected with digital signal processor 10 by CAN bus.
As shown in Figure 2, described battery temperature sample circuit 53 comprises resistance R1, resistance R2, resistance R3, thermistor RD, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, operational amplifier A R1, operational amplifier A R2, described resistance R1 and resistance R2 connects, described resistance R3 and thermistor RD connects, described resistance R1 and resistance R2 is in parallel with resistance R3 and thermistor RD, described electric capacity C1 and electric capacity C3 is in parallel with resistance R1, described electric capacity C2 and electric capacity C4 is in parallel with thermistor RD, described resistance R1 is connected with the negative input end of operational amplifier A R1 with resistance R2 junction, described resistance R3 is connected with the positive input terminal of operational amplifier A R2 with thermistor RD junction, the output terminal of described operational amplifier A R1 is connected with the negative input end of operational amplifier A R2, one end ground connection of described thermistor RD.Wherein, described thermistor RD is posistor.Battery temperature sample circuit 53 can realize the temperature sampling to single battery.In Fig. 2, thermistor RD is a kind of temp-sensitive sensor, and its principle is that resistance value varies with temperature and changes.The material of general thermistor has nickel, manganese, the metal oxides such as cobalt, and the thermistor resistances value variation with temperature of these materials is obvious, and this thermistor is easily produced in batches, and price comparison is reasonable.But the shortcoming of this thermistor is resistance value variation with temperature is nonlinear, and the temperature range that can measure is generally-100 ~ 400 degrees Celsius, and interchangeability is bad.Usually, according to the temperature characterisitic of thermistor, thermistor can be divided into following three classes: posistor, negative temperature coefficient and critical coefficient thermistor.This circuit uses posistor.Although the temperature variant linearity of the resistance value of thermistor RD is bad, but this circuit is in fact not high to the linearity of thermistor RD, because battery temperature sample circuit is without the need to measuring the temperature of battery exactly, only need the upper and lower bound detecting battery temperature, to provide warning, so poor linearity also has no relations, common thermistor can meet the demands.The thermistor RD volume that this circuit adopts is little, and cost performance is high, and easy to use, only needs it to be directly attached on the shell of single battery during use.In Fig. 2, the model of operational amplifier A R1 and operational amplifier A R2 adopts common LM358 model.
As shown in Figure 3, described environment temperature sample circuit 53 comprises integrated temperature sensor AN, operational amplifier A R, NPN type triode VT1, NPN type triode VT2, resistance Rb, variable resistor Rp, described integrated temperature sensor AN one end is connected with the negative input end of operational amplifier A R, described integrated temperature sensor AN outer meeting resistance Rb, described variable resistor Rp is connected with the positive input terminal of operational amplifier A R, the output terminal of described operational amplifier A R is connected with the base stage of NPN type triode VT1, the emitter of described NPN type triode VT1 is connected with the base stage of NPN type triode VT2.Wherein, described integrated temperature sensor AN comprises temperature-sensitive or temperature sensing element, temperature compensation part and amplifier section.This circuit is ambient temperature detection circuit, and its fundamental purpose is measures ambient temperature, to provide reference.Have employed integrated temperature sensor AN in circuit, model is AN6701, AN6701 is a low price, highly sensitive, the high-performance integrated temperature sensor that the temperature range of measurement is wider.The thermal response characteristics of AN3701 is relatively good, and input impedance is high, and output impedance is low, and employing is microencapsulated form.Its most important performance index have: sensitivity position 106 ~ 115mv/ DEG C, and this is the sensitivity when the Standard resistance range of outer meeting resistance Rb is 1 ~ 100K; Measurement range is-10 ~ 80 DEG C, and this scope meets the environment temperature under usual terms, is applicable to being used in this battery management system; Nonlinearity is ± 0.6%; When static air, thermal time constant is generally 25S, and under the air conditions having wind, thermal time constant is 12S; Thermal resistance is 300 DEG C/W.Compared with detecting with battery temperature above, ambient temperature measurement circuit needs to measure environment temperature accurately provides reference, all linearities that needs are very good, and the poor linearity problem unlike battery temperature testing circuit is also little, only need to measure upper and lower bound as the prompting of reporting to the police.The input-output characteristic of AN6701 has relation with external resistance Rb in fact, and the linearity under common environment temperature is very good, usually within 5%, meets the requirement of environment measurement circuit.Want the working temperature measurement range and the sensitivity that change this metering circuit, only need the size changing outer meeting resistance Rb.Under 25 DEG C of normal temperature, the scope of Rb is traditionally arranged to be 3 ~ 30K, by correcting, in the temperature range of-10 ~ 80 DEG C, has ± the precision of 0.1.AN6701 only needs external correction resistance Rb, and does not need the element connecing other again, and thermometric sensitivity will be fine, and its volume is little in addition, easy to use.
Above content is only better embodiment of the present utility model, for those of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, this description should not be construed as restriction of the present utility model.
Claims (9)
1. a multifunctional motor-driven automobile batteries management system, comprise digital signal processor (10), protection circuit (20), sampling hold circuit (30), second-order filter circuit (40), voltage sampling circuit (51), current sampling circuit (52), it is characterized in that: also comprise battery temperature sample circuit (53) and environment temperature sample circuit (54), described voltage sampling circuit (51) is connected with second-order filter circuit (40) with current sampling circuit (52), described second-order filter circuit (40) is connected with sampling hold circuit (30), described sampling hold circuit (30) is connected with protection circuit (20), described battery temperature sample circuit (53) is connected with protection circuit (20) respectively with environment temperature sample circuit (54), described protection circuit (20) is connected with digital signal processor (10).
2. a kind of multifunctional motor-driven automobile batteries management system as claimed in claim 1, it is characterized in that: described battery temperature sample circuit (53) comprises resistance (R1), resistance (R2), resistance (R3), thermistor (RD), electric capacity (C1), electric capacity (C2), electric capacity (C3), electric capacity (C4), operational amplifier (AR1), operational amplifier (AR2), described resistance (R1) and resistance (R2) series connection, described resistance (R3) and thermistor (RD) series connection, described resistance (R1) and resistance (R2) in parallel with resistance (R3) and thermistor (RD), described electric capacity (C1) and electric capacity (C3) in parallel with resistance (R1), described electric capacity (C2) and electric capacity (C4) in parallel with thermistor (RD), described resistance (R1) is connected with the negative input end of resistance (R2) junction with operational amplifier (AR1), described resistance (R3) is connected with the positive input terminal of thermistor (RD) junction with operational amplifier (AR2), the output terminal of described operational amplifier (AR1) is connected with the negative input end of operational amplifier (AR2), one end ground connection of described thermistor (RD).
3. a kind of multifunctional motor-driven automobile batteries management system as claimed in claim 2, is characterized in that: described thermistor (RD) is posistor.
4. a kind of multifunctional motor-driven automobile batteries management system as claimed in claim 1, it is characterized in that: described environment temperature sample circuit (53) comprises integrated temperature sensor (AN), operational amplifier (AR), NPN type triode (VT1), NPN type triode (VT2), resistance (Rb), variable resistor (Rp), described integrated temperature sensor (AN) one end is connected with the negative input end of operational amplifier (AR), described integrated temperature sensor (AN) outer meeting resistance (Rb), described variable resistor (Rp) is connected with the positive input terminal of operational amplifier (AR), the output terminal of described operational amplifier (AR) is connected with the base stage of NPN type triode (VT1), the emitter of described NPN type triode (VT1) is connected with the base stage of NPN type triode (VT2).
5. a kind of multifunctional motor-driven automobile batteries management system as claimed in claim 4, is characterized in that: described integrated temperature sensor (AN) comprises temperature-sensitive or temperature sensing element, temperature compensation part and amplifier section.
6. a kind of multifunctional motor-driven automobile batteries management system as claimed in claim 1, it is characterized in that: described voltage sampling circuit (51) is connected with second-order filter circuit (40) by analog switch (60), described analog switch (60) is two 16 path analoging switch.
7. a kind of multifunctional motor-driven automobile batteries management system as claimed in claim 1, it is characterized in that: the keyboard (71) also comprise liquid crystal display (70), being connected with liquid crystal display (70), described liquid crystal display (70) is connected with digital signal processor (10) by CAN bus.
8. a kind of multifunctional motor-driven automobile batteries management system as claimed in claim 1, is characterized in that: also comprise the safety switch (80) be connected with digital signal processor (10).
9. a kind of multifunctional motor-driven automobile batteries management system as claimed in claim 1, is characterized in that: also comprise the erasable and programable memory (90) be connected with digital signal processor (10).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420562072.0U CN204188776U (en) | 2014-09-28 | 2014-09-28 | A kind of multifunctional motor-driven automobile batteries management system |
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| CN201420562072.0U CN204188776U (en) | 2014-09-28 | 2014-09-28 | A kind of multifunctional motor-driven automobile batteries management system |
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| CN204188776U true CN204188776U (en) | 2015-03-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104267352A (en) * | 2014-09-28 | 2015-01-07 | 苏州克兰兹电子科技有限公司 | Multifunctional electric vehicle battery management system |
| US11552343B2 (en) * | 2017-11-07 | 2023-01-10 | Lg Energy Solution, Ltd. | Apparatus and method for estimating temperature of battery |
-
2014
- 2014-09-28 CN CN201420562072.0U patent/CN204188776U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104267352A (en) * | 2014-09-28 | 2015-01-07 | 苏州克兰兹电子科技有限公司 | Multifunctional electric vehicle battery management system |
| US11552343B2 (en) * | 2017-11-07 | 2023-01-10 | Lg Energy Solution, Ltd. | Apparatus and method for estimating temperature of battery |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150304 Termination date: 20150928 |
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| EXPY | Termination of patent right or utility model |