CN102680901A - Electronic energy detection system and method - Google Patents

Abstract

The invention relates to the technical field of electronic energy detection and discloses an electronic energy detection system. The electronic energy detection system comprises a battery, an electronic battery sensor and an electronic control unit, which are connected in sequence; the electronic battery sensor is used for acquiring working state parameters of a battery, processing the working state parameters and then sending the processed working state parameters to the electronic control unit; and the electronic control unit is used for analyzing the received data and sending control instructions to related functional modules in the electronic energy detection system according to an analysis result. The invention further provides a method for carrying out electronic energy detection by using the electronic energy detection system. The electronic energy detection system and method can realize accurate measurement of battery voltage, current and temperature, thereby accurately monitoring the battery state; and the electronic battery sensor is connected with the electronic control unit through an LIN (Local Interconnect Network) bus interface, so that an internal circuit of the sensor can be simplified, and thus the cost can be saved.

Description

Electronics energy detection system and method

Technical field

The present invention relates to electronics energy detection technique field, be specifically related to a kind of electronics energy detection system and method.

Background technology

At present,, the notion of new energy sources for automobile occurred, and produced notions such as fuel cell car, hybrid power/Weak hybrid power automobile, hydrogen energy source power vehicle and solar telephone thus for energy-saving and emission-reduction.Wherein Weak hybrid power automobile is supporting that low speed slides, switch-off, to utilize when gently touching on the brake and slide the energy accumulation of energy, and jack engine does work together during big foot throttle, and its core technology is " force start/stop " technology.

Electronics energy detection system of the prior art can not realize the accurate measurement to cell voltage, electric current and temperature, thereby can not accurately monitor the various states of battery, like charged state (SoC), health status (SoH) and functional status (SoF).

Summary of the invention

The technical matters that (one) will solve

The technical matters that the present invention will solve is: how to realize the accurate measurement to cell voltage, electric current and temperature, thereby accurately monitor the state of battery.

(2) technical scheme

For solving the problems of the technologies described above, the invention provides a kind of electronics energy detection system, comprise the battery, electronic cell sensor and the electronic control unit that connect successively,

Said electronic cell sensor is used to gather the working status parameter of said battery, and said working status parameter is sent to said electronic control unit after handling,

Said electronic control unit is used for received data are analyzed, and according to analysis result the correlation function module is sent steering order then.

Preferably, be connected through the LIN EBI between said electronic cell sensor and the electronic control unit.

Preferably, said electronic cell sensor comprises data acquisition module, data processing module and the data computation module that connects successively;

Said data acquisition module comprises that the resistive attenuator of the voltage data that is used to gather battery, the sampling resistor and being used to that is used to gather the current data of battery gather the temperature sensor of the temperature data of battery;

Said data processing module is used for the temperature data after said voltage data, current data and the amplification certain multiple is carried out analog to digital conversion; Carry out obtaining after the filtering valid data result of voltage data, current data and temperature data then; And the valid data result of voltage data and current data revised obtain modified value, at last result is sent to data computation module;

Said data computation module is used for the modified value of the current data of receiving in the Preset Time section is carried out integration; And the net charge number that integration is obtained is as the residual capacity of battery; Voltage data to receiving in the said Preset Time section adds up with preset speed, and the result of said residual capacity, the voltage data that adds up and the valid data result of temperature data are sent to electronic control unit.

Preferably, said battery is an accumulator.

The present invention also provides a kind of and has utilized described system to carry out the method that the electronics energy detects, and may further comprise the steps:

The voltage data of S1, said data collecting module collected battery, current data and temperature data;

S2, the said data processing module temperature data after with said voltage data, current data and amplification certain multiple carries out analog to digital conversion; Carry out obtaining after the filtering valid data result of voltage data, current data and temperature data then; And the valid data result of voltage data and current data revised obtain modified value, at last result is sent to data computation module;

S3, said data computation module carry out integration to the modified value of the current data received in the Preset Time section; And the net charge number that integration is obtained is as the residual capacity of battery; Voltage data to receiving in the said Preset Time section adds up with preset speed, and the result of said residual capacity, the voltage data that adds up and the valid data result of temperature data are sent to electronic control unit;

S4, judge said residual capacity when electronic control unit and be lower than certain threshold value, the result of the voltage data that adds up surpasses certain threshold value, when the temperature data after perhaps amplifying surpasses certain threshold value, a part of electricity consumption device shuts off of Control of Automobile then.

(3) beneficial effect

The present invention can realize the accurate measurement to cell voltage, electric current and temperature, thereby accurately monitors the state of battery; Be connected through the LIN EBI between electronic cell sensor and the electronic control unit and can simplify the sensor internal circuit, thereby save cost.

Description of drawings

Fig. 1 is the system architecture synoptic diagram of the embodiment of the invention;

Fig. 2 is the method flow diagram of the embodiment of the invention.

Embodiment

Below in conjunction with accompanying drawing and embodiment, specific embodiments of the invention is done further explain.Following examples are used to explain the present invention, but are not used for limiting scope of the present invention.

Electronics energy detection system is the tie between battery and the user; The utilization factor that it can improve battery prevents that battery from occurring overcharging and overdischarge, prolongs the serviceable life of battery; The state of monitoring battery reduces the vehicle failure number of times that caused because of unexpected inefficacy of battery to greatest extent.

As shown in Figure 1, the embodiment of the invention provides a kind of electronics energy detection system, comprises the accumulator 1, electronic cell sensor (EBS) 2 and the electronic control unit (ECU) 3 that connect successively,

Said electronic cell sensor 2 is used to gather the working status parameter of said accumulator, and said working status parameter is sent to said electronic control unit after handling,

Said electronic control unit 3 is used for received data are analyzed, and according to analysis result the correlation function module is sent steering order then.

Be connected through the LIN EBI between said electronic cell sensor 2 and the electronic control unit 3.

Said electronic cell sensor 2 comprises data acquisition module 201, data processing module 202 and the data computation module 203 that connects successively;

Said data acquisition module 201 comprises that the resistive attenuator of the voltage data that is used to gather accumulator, the sampling resistor (for example the sampling resistor of 100 μ Ω is called current sense resistor again) and being used to that is used to gather the current data of accumulator gather the temperature sensor of the temperature data of accumulator;

Said data processing module 202 is used for said voltage data, current data and amplification certain multiple (are for example realized with programmable gain amplifier PGA; In the present embodiment being 5 times) afterwards temperature data carries out analog to digital conversion and (realizes with analog to digital converter ADC; AduC703X family chip for example); Carry out filtering then and (for example realize filtering noise signal with the digital filter of 16bit; Obtain valid data) after obtain the valid data result of voltage data, current data and temperature data, and the valid data result of voltage data and current data revised obtain modified value, at last result is sent to data computation module 203.Need to prove that because the signal that resistive attenuator and sampling resistor collected all has certain error, so need carry out the correction of side-play amount (ADCOF) or amount of gain (ADCGN), the realization system regulates automatically and makes data more accurate.Because the signal that temperature sensor is gathered is generally all fainter, therefore need amplify.Wherein, the temperature data that amplifies certain multiple is put into analog to digital converter conversion can make the full scale signal of analog to digital converter reach homogenization, thereby improve measuring accuracy greatly.

Said data computation module 203 is used for the modified value of the current data of receiving in the Preset Time section is carried out integration; And the net charge number that integration is obtained is as the residual capacity of accumulator 1; Voltage data to receiving in the said Preset Time section adds up with preset speed, and the result of said residual capacity, the voltage data that adds up and the temperature data after the amplification are sent to electronic control unit 3.

As shown in Figure 2, the present invention also provides a kind of said system of utilizing to carry out the method that the electronics energy detects, and may further comprise the steps:

The voltage data of S1, said data collecting module collected accumulator, current data and temperature data;

S2, the said data processing module temperature data after with said voltage data, current data and amplification certain multiple carries out analog to digital conversion; Carry out obtaining after the filtering valid data result of voltage data, current data and temperature data then; And the valid data result of voltage data and current data revised obtain modified value, at last result is sent to data computation module;

S3, said data computation module carry out integration to the modified value of the current data received in the Preset Time section, and the net charge number that integration is obtained is as the residual capacity of accumulator, to the voltage data V that receives in the said Preset Time section _DSpeed with preset adds up, and the result of said residual capacity, the voltage data that adds up and the valid data result of temperature data are sent to electronic control unit; Computing formula is following:

Set R _TESTBe the sampling resistor of 100 μ Ω, RL is the pull-up resistor of battery.Battery passes through R _TESTElectric current I when RL is discharged _OAt R _TESTThe pressure drop that two ends produce does

V _D(t)＝I _O(t)×R _TEST

Data processing module continues to detect R _TESTThe pressure reduction V at two ends _D, and be digital quantity CR with its analog to digital conversion, unit is V (volt), adds up to set speed afterwards, and accumulation result is ACR, and unit is Vh (when paying).To the V after quantizing _DAdding up is equivalent to it is carried out integration, and the result is:

Battery electric quantity: $Q={\∫}_0^t\mathrm{Io}\left(t\right)\mathrm{Dt}={\∫}_0^t\frac{V_D\left(t\right)}{R_{\mathrm{TEST}}}\mathrm{Dt}=\frac{1}{R_{\mathrm{TEST}}}{\∫}_0^t{V}_D\left(t\right)\mathrm{Dt}.$

Battery capacity is C, the Ah of unit (ampere-hour):

During charging CR be on the occasion of, ACR increases progressively; CR is a negative value during discharge, and ACR successively decreases.

S4, judge said residual capacity when electronic control unit and be lower than certain threshold value, the result of the voltage data that adds up surpasses certain threshold value, when the temperature data after perhaps amplifying surpasses certain threshold value, a part of electricity consumption device shuts off of Control of Automobile then.For example when judging that accumulator electric-quantity is very low, battery temperature is too high and cross (battery temp is low excessively, and discharge current can reduce, and might influence startup) when low, ECU can control engine when very of short duration parking, also can work on (start stop system is closed); (when waiting traffic lights, this is detected by ECU automatically) is lower than limit value in case accumulator electric-quantity occurs when tail-off, and engine can restart at once.

Can find out that by above embodiment the present invention can realize the accurate measurement to cell voltage, electric current and temperature, thereby accurately monitor the state of battery; Be connected through the LIN EBI between electronic cell sensor and the electronic control unit and can simplify the sensor internal circuit, thereby save cost.

The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from know-why of the present invention; Can also make some improvement and modification, these improve and modification also should be regarded as protection scope of the present invention.

Claims (5)

1. an electronics energy detection system is characterized in that, comprises the battery, electronic cell sensor and the electronic control unit that connect successively,

Said electronic cell sensor is used to gather the working status parameter of said battery, and said working status parameter is sent to said electronic control unit after handling,

Said electronic control unit is used for received data are analyzed, and according to analysis result the correlation function module is sent steering order then.

2. the system of claim 1 is characterized in that, is connected through the LIN EBI between said electronic cell sensor and the electronic control unit.

3. the system of claim 1 is characterized in that, said electronic cell sensor comprises data acquisition module, data processing module and the data computation module that connects successively;

Said data acquisition module comprises that the resistive attenuator of the voltage data that is used to gather battery, the sampling resistor and being used to that is used to gather the current data of battery gather the temperature sensor of the temperature data of battery;

Said data processing module is used for the temperature data after said voltage data, current data and the amplification certain multiple is carried out analog to digital conversion; Carry out obtaining after the filtering valid data result of voltage data, current data and temperature data then; And the valid data result of voltage data and current data revised obtain modified value, at last result is sent to data computation module;

Said data computation module is used for the modified value of the current data of receiving in the Preset Time section is carried out integration; And the net charge number that integration is obtained is as the residual capacity of battery; Voltage data to receiving in the said Preset Time section adds up with preset speed, and the result of said residual capacity, the voltage data that adds up and the valid data result of temperature data are sent to electronic control unit.

4. like claim 1 or 2 or 3 described systems, it is characterized in that said battery is an accumulator.

5. one kind is utilized claim 3 or 4 described systems to carry out the method that the electronics energy detects, and it is characterized in that, may further comprise the steps:

The voltage data of S1, said data collecting module collected battery, current data and temperature data;

S2, the said data processing module temperature data after with said voltage data, current data and amplification certain multiple carries out analog to digital conversion; Carry out obtaining after the filtering valid data result of voltage data, current data and temperature data then; And the valid data result of voltage data and current data revised obtain modified value, at last result is sent to data computation module;

S3, said data computation module carry out integration to the modified value of the current data received in the Preset Time section; And the net charge number that integration is obtained is as the residual capacity of battery; Voltage data to receiving in the said Preset Time section adds up with preset speed, and the result of said residual capacity, the voltage data that adds up and the valid data result of temperature data are sent to electronic control unit;

S4, judge said residual capacity when electronic control unit and be lower than certain threshold value, the result of the voltage data that adds up surpasses certain threshold value, when the temperature data after perhaps amplifying surpasses certain threshold value, a part of electricity consumption device shuts off of Control of Automobile then.

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