CN206671507U - The battery simulator of multi-path high-precision analog signal output - Google Patents
The battery simulator of multi-path high-precision analog signal output Download PDFInfo
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- CN206671507U CN206671507U CN201720405105.4U CN201720405105U CN206671507U CN 206671507 U CN206671507 U CN 206671507U CN 201720405105 U CN201720405105 U CN 201720405105U CN 206671507 U CN206671507 U CN 206671507U
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- analog signal
- analog
- battery simulator
- output
- isolation
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Abstract
The utility model discloses a kind of battery simulator of multi-path high-precision analog signal output, with a power supply module, the battery simulator has some analog voltage control modules that working power is provided via the power supply module, and the analog voltage control module has one to be used to carry out the analog signal of input the analog isolation modular converter and a sample circuit module of isolating conversion.The utility model provides a kind of achievable multi-way contral and multiple batteries can observed and tested simultaneously, and can improve the battery simulator of the multi-path high-precision analog signal output of output analog signal accuracy.
Description
Technical field
It the utility model is related to battery simulator analog signal output technical field, more particularly to a kind of multi-path high accuracy
The battery simulator of analog signal output.
Background technology
For automobile batteries management system development stage and automobile research stage, it is required for largely being tested.Such as
If directly testing actual battery, cost height, cycle length be present, and magnitude of voltage of accurate control output can not be realized etc.
Problem.If some special operation condition tests are carried out directly on actual battery (such as simulates big voltage output, voltage die, battery
The operating modes such as short circuit), then there can be very big potential safety hazard, easily cause immeasurable loss.Battery simulator is artificial battery
The testing time can effectively be reduced, there is provided the test environment of repeated one safety of test result and creation.Separately
Outside, by testing battery temperature and burn-in test, time can be reduced, avoids the error of operator and the deviation of result
Etc. factor.But when being tested for existing battery simulator, if multiple batteries need to be observed and surveyed simultaneously
Examination, such as in a Battery pack after being recycled for multiple times, calculates the inducing capacity fading rate of each battery of the group or the difference of resistance growth rate
It is different.The power output apparatus of existing battery simulator typically only 1~2 interface, can not meet to multiple batteries while carry out
The actual demand of test.Meanwhile existing battery simulator is using traditional partition method (such as light-coupled isolation, the isolation of magnetic coupling
Deng) analog signal is isolated, control accuracy is poor, influences the output accuracy of simulator.In the prior art, such as patent of invention
" the high-precision analog signal isolation conversion output system " and utility model patent (application number of (application number 2017101324213)
2017202175419) " high-precision analog signal isolation conversion output system " etc., by using data signal isolation, makes
Error is smaller by load effect, ratio adjustment is carried out to the analog voltage of output via operational amplifier and improves power output,
But output analog signal accuracy is still not ideal enough.
Utility model content
The utility model for battery simulator of the prior art exist can not multiple batteries simultaneously observed and surveyed
Examination, and the defects of analog signal accuracy is not high enough is exported, and it is an object of the present invention to provide a kind of multi-way contral can be same to multiple batteries
Shi Jinhang is observed and test, and can improve the battery mould of the multi-path high-precision analog signal output of output analog signal accuracy
Intend device.
Realizing the technical scheme of above-mentioned purpose is：
The battery simulator of the utility model multi-path high-precision analog signal output, there is a power supply module, the electricity
Pond simulator has some simulation electricity for being connected in series with the power supply module and working power being provided via the power supply module
Press control module, the analog voltage control module have one be used to the analog signal of input isolate the simulation of conversion every
From modular converter and a sample circuit module being connected with the analog isolation modular converter, the sample circuit module is used for will
The analog signal of analog isolation modular converter output sampled and by the sampled result of acquisition input to the simulation every
Closed loop feedback processing is carried out from modular converter, so as to obtain high-precision analog output voltage.
The battery simulator has one to be connected in series with host computer and by the host computer by required output analog voltage
It is worth the CAN communication interface to the battery simulator, some analog voltage control modules are equipped with one and the CAN communication
The CAN communication interface unit of interface tandem connection, realizes the independent communication between some analog voltage control modules, and then
Realize multichannel independent control.
There is the power supply module AC/DC that the alternating current for inputting the battery simulator is converted into direct current to change
Module and some DC/DC isolation modules being connected in series with the AC/DC modular converters, some DC/DC isolation modules are used
Common ground direct current electric isolution after the AC/DC modular converters are changed is converted into multichannel not altogether and mutually isolated direct current
Electricity, so as to provide DC supply to some analog voltage control modules.
The power supply module has one to be connected in series in the AC/DC modular converters and some DC/DC isolation modules
Between relay, the power supply of the battery simulator is cut off during for breaking down, playing safeguard protection effect.
The analog isolation modular converter is sequentially connected in series one and is used to calculate and obtain high-precision pre-output analog voltage
The single-chip microcomputer of value, one be used for the isolation Serial Peripheral Interface (SPI) circuit of isolation processing data signal, one will be serial via the isolation
Data signal after peripheral interface circuit isolation processing is converted into the analog-digital chip of analog signal and one and turns the digital-to-analogue
The analog signal for changing chip acquisition is amplified the operational amplifier and an electricity for reducing output analog signal loss of processing
Pressure follows circuit.
The sample circuit module is isolated with the output end being sequentially connected in series in the voltage follower circuit with described
A sample circuit and a modulus conversion chip between Serial Peripheral Interface (SPI) circuit, the modulus conversion chip are used to adopt described
The sampling analogue voltage that sample circuit sampling obtains is converted into digital voltage and is transferred to the isolation Serial Peripheral Interface (SPI) circuit, then passes through
The single-chip microcomputer is given by sampling analogue voltage value and pre-output analog voltage by the isolation Serial Peripheral Interface (SPI) circuit transmission
It is compared, calculation error realizes the output analog voltage of higher precision.
Some analog voltage control modules are respectively provided with a power interface unit, isolate respectively with some DC/DC
Block coupled in series electrically connects the offer for realizing DC supply.
The battery simulator has an analog voltage output interface, the voltage of some analog voltage control modules with
It is connected in series with circuit output end with the analog voltage output interface, exports high-precision analog voltage.
The battery simulator has a power interface being connected in series with external AC, the power interface with it is described
The AC/DC modular converters of power supply module are connected in series.
The sample circuit module is a voltage sample module or a current sample module.
Positive effect of the present utility model is：
The battery simulator of multi-path high-precision analog signal output of the present utility model, pass through some DC/DC isolation modes
Common ground direct current is electrically isolated and is converted into multichannel not altogether and mutually isolated direct current by block, controls mould to some analog voltages respectively
Block is powered, and realizes that multichannel independent control can be achieved to multiple batteries while be observed and be tested；Meanwhile via adopting
Sample circuit module the output analog voltage of each analog voltage control module is sampled respectively and by sampled result input to
Analog isolation modular converter carries out closed loop feedback processing, so as to obtain the output analog voltage of higher precision.
Design, concrete structure and caused technique effect of the present utility model are made furtherly below with reference to accompanying drawing
It is bright, to be fully understood from the purpose of this utility model, feature and effect.
Brief description of the drawings
Fig. 1 is the structural representation of the battery simulator of the utility model multi-path high-precision analog signal output；
Fig. 2 is the theory diagram of the battery simulator of the utility model multi-path high-precision analog signal output.
Embodiment
With reference to Fig. 1 and Fig. 2, the battery simulator of multi-path high-precision analog signal output of the present utility model is entered
Row detailed description.
As shown in figure 1, the battery simulator of the multi-path high-precision analog signal output of the present embodiment, has power supply module
10 and some analog voltage control modules 20 for being connected in series with power supply module 10 and working power being provided via power supply module 10.
Analog voltage control module 20, which has, to be used to carry out the analog signal of input the He of analog isolation modular converter 21 for isolating conversion
Sample circuit module 22.Sample circuit module 22 is used to sample the output voltage of battery simulator output end, and will obtain
The single-chip microcomputer that the sampled result obtained is transferred to analog isolation modular converter 21 carries out closed loop feedback processing, high-precision so as to obtain
Export analog voltage.Analog isolation modular converter 21 is sequentially connected in series for calculating and obtaining high-precision pre-output simulation electricity
Pressure is as shown in Fig. 2 power supply module 10 has the AC/DC modular converters that the alternating current for inputting battery simulator is converted into direct current
11 and some DC/DC isolation modules 12 for being connected in series with AC/DC modular converters 11.DC/DC isolation modules 12 are used for AC/DC
Common ground direct current after modular converter 11 is changed is electrically isolated and is converted into multichannel not altogether and mutually isolated direct current, some so as to give
Analog voltage control module 20 provides DC supply.Power supply module 10, which has, is connected in series in the He of AC/DC modular converters 11
Relay 13 between some DC/DC isolation modules 12, the power supply of battery simulator is cut off during for breaking down, being played
Safeguard protection acts on.Power supply module 10 has the power interface 14 being connected in series with external AC, power interface 14 and power supply
The AC/DC modular converters 11 of module 10 are connected in series, and working power is provided to battery simulator to realize.
As shown in Fig. 2 analog isolation modular converter 21 is sequentially connected in series single-chip microcomputer (MCU, Microcontroller
Unit) 211, isolation Serial Peripheral Interface (SPI) (SPI, Serial Peripheral Interface) circuit 212, digital-to-analogue conversion core
Piece 213 (also known as D/A conversion chips), operational amplifier 214 and voltage follower circuit 215.Battery simulator has and host computer
It is connected in series and by host computer by required CAN (the Controller Area for exporting analog voltage to battery simulator
Network) communication interface 30, some analog voltage control modules 20 are equipped with a series connection of CAN communication interface 30 and connected
The CAN communication interface unit 216 connect, the independent communication between some analog voltage control modules 20 is realized, and then realized more logical
Road independent control.Some analog voltage control modules 20 are respectively provided with power interface unit 217, respectively with some DC/DC isolation modes
Block 12 is electrically connected in series the offer for realizing DC supply.
The analog voltage of required output is sent in single-chip microcomputer 211 by host computer by CAN communication interface 30, single-chip microcomputer
211 calculate high-precision pre-output analog voltage according to its internal equivalent-circuit model, and pre-output analog voltage passes through
Data signal after being isolated after isolation SPI circuit 212, and the digital data transmission is turned to D/A conversion chips 213, D/A
Change chip 213 and convert digital signals into analog signal.Operational amplifier 214 changes the simulation obtained to D/A conversion chips 213
Magnitude of voltage carries out scaling, raising power output.There is high input impedance, low output impedance via voltage follower circuit 215
Characteristic, reduce the loss via the analog voltage after the enhanced processing of operational amplifier 214.
As shown in Fig. 2 sample circuit module 22 have be sequentially connected in series output end in voltage follower circuit 215 with every
From the sample circuit 221 and modulus conversion chip 222 between Serial Peripheral Interface (SPI) circuit 212.Sample circuit 221 is voltage sample
Module or current sample module.In one preferred embodiment, sample circuit 221 is voltage sample module.Sample circuit 221 is distinguished
Analog voltage is sampled on the both positive and negative polarity of the output circuit of battery simulator, obtains feeding back positive voltage and feeds back negative voltage
(being designated as Feedback V+ and Feedback V- respectively), the analog signal now gathered turns into sampled analogue signals, then passes through
The modulus conversion chip (A/D conversion chips) 222 of sample circuit module 22 will feed back positive voltage and feedback negative voltage transition into number
Word signal, then the magnitude of voltage that sampling is obtained by isolation SPI circuit 212 are sent in single-chip microcomputer 211, and it is anti-to form signal closed loop
It is fed back to road.Single-chip microcomputer 211 by comparing the magnitudes of voltage of sampled analogue signals and pre-output analog signal voltage value, calculate both it
Between error, and according to error come adjust and correct output analog voltage, so as to improve the analog voltage precision of output.Battery
Simulator has analog voltage output interface 40, the output end of the voltage follower circuit 215 of some analog voltage control modules 20
It is connected in series with analog voltage output interface 40, multi-path output high-precision analog voltage.
The operation principle of the battery simulator of the utility model multi-path high-precision analog signal output is specific as follows：
Step1, power interface 14 and the external AC of battery simulator are connected in series, power supply module 10 starts work
Make；
Step2, the alternating current of input is converted into direct current via AC/DC modular converters 11, connected by series connection with it
Some DC/DC isolation modules 12 AC/DC modular converters 11 are changed after common ground direct current be electrically isolated and be converted into multichannel not altogether
And mutually isolated direct current, power supply of some DC/DC isolation modules 12 respectively with some analog isolation modular converters 21 is connect
Mouth unit 217 is connected in series, and is realized and is provided DC supply to some analog isolation modular converters 21；
Step3, host computer by the battery simulator of CAN communication interface 30 of battery simulator, via with CAN communication interface
The CAN communication interface unit 216 of the 30 some analog isolation modular converters 21 being connected in series is by the analog voltage of required output
It is respectively transmitted in the single-chip microcomputer 211 of each analog isolation modular converter 21, single-chip microcomputer 211 is according to its internal equivalent-circuit model
High-precision pre-simulated magnitude of voltage is calculated, pre-output analog voltage is by isolating after SPI circuit 212 number after being isolated
Word signal, and the digital data transmission is converted digital signals into simulation to D/A conversion chips 213, D/A conversion chips 213
Signal.Operational amplifier 214 changes the analog voltage obtained to D/A conversion chips 213 and carries out scaling, raising output work
Rate.There is the characteristic of high input impedance, low output impedance via voltage follower circuit 215, reduce and put via operational amplifier 214
The loss of analog voltage after big processing；
Step4, sample circuit 221 is carried out on the both positive and negative polarity of the output circuit of battery simulator to analog voltage respectively
Sampling, obtaining feeding back positive voltage and feed back negative voltage, the analog signal now gathered turns into sampled analogue signals, then through over-sampling
The modulus conversion chip 222 of circuit module 22 will feed back positive voltage and feedback negative voltage transition into data signal, then by isolation
The magnitude of voltage that SPI circuit 212 obtains sampling is sent in single-chip microcomputer 211, forms signal closed feedback loop；Single-chip microcomputer 211
By comparing the magnitude of voltage and pre-output analog signal voltage value of sampled analogue signals, error between the two is calculated, and according to by mistake
Difference come adjust and correct output analog voltage, so as to improve the analog voltage precision of output；Battery simulator has simulation
Voltage output interface 40, the output end of the voltage follower circuit 215 of some analog voltage control modules 20 are defeated with analog voltage
Outgoing interface 40 is connected in series, multi-path output high-precision analog voltage.
Each preferred embodiment of the present utility model described in detail above.It should be appreciated that the ordinary skill of this area
Personnel make many modifications and variations without creative work can according to design of the present utility model.Therefore, all this technologies
Technical staff passes through logic analysis, reasoning or limited on the basis of existing technology according to design of the present utility model in field
Available technical scheme is tested, all should be in the protection domain being defined in the patent claims.
Claims (10)
1. a kind of battery simulator of multi-path high-precision analog signal output, there is a power supply module, it is characterised in that described
Battery simulator has some simulations for being connected in series with the power supply module and working power being provided via the power supply module
Voltage control module, the analog voltage control module have one to be used to carry out the analog signal of input the simulation for isolating conversion
Isolate modular converter and a sample circuit module being connected with the analog isolation modular converter.
2. the battery simulator of multi-path high-precision analog signal output as claimed in claim 1, it is characterised in that the electricity
Pond simulator have one with host computer be connected in series and by the host computer by the required analog voltage that exports to the battery mould
Intend the CAN communication interface of device, some analog voltage control modules are equipped with one and are connected with the CAN communication interface tandem
CAN communication interface unit, the independent communication between some analog voltage control modules is realized, and then realize multichannel independence
Control.
3. the battery simulator of multi-path high-precision analog signal output as claimed in claim 1, it is characterised in that the confession
Electric module have one by the alternating current for inputting the battery simulator be converted into direct current AC/DC modular converters and with it is described
Some DC/DC isolation modules that AC/DC modular converters are connected in series, some DC/DC isolation modules are used for the AC/DC
Common ground direct current after modular converter conversion, which is electrically isolated, is converted into multichannel not altogether and mutually isolated direct current, so as to give some institutes
State analog voltage control module and DC supply is provided.
4. the battery simulator of multi-path high-precision analog signal output as claimed in claim 3, it is characterised in that the confession
Electric module has a relay being connected in series between the AC/DC modular converters and some DC/DC isolation modules, uses
The power supply of the battery simulator is cut off when breaking down, plays safeguard protection effect.
5. the battery simulator of multi-path high-precision analog signal output as claimed in claim 1, it is characterised in that the mould
Intend isolation modular converter be sequentially connected in series one be used for calculate and obtain the single-chip microcomputer of high-precision pre-output analog voltage, one use
Isolation Serial Peripheral Interface (SPI) circuit in isolation processing data signal, one will be via the isolation Serial Peripheral Interface (SPI) circuit isolation
Data signal after processing is converted into analog-digital chip and a simulation for obtaining the analog-digital chip for analog signal
Signal is amplified the operational amplifier of processing and one and is used to reduce the voltage follower circuit that output analog signal is lost.
6. the battery simulator of multi-path high-precision analog signal output as claimed in claim 5, it is characterised in that described to adopt
Sample circuit module isolates Serial Peripheral Interface (SPI) electricity with the output end being sequentially connected in series in the voltage follower circuit with described
A sample circuit and a modulus conversion chip between road.
7. the battery simulator of multi-path high-precision analog signal output as claimed in claim 3, it is characterised in that Ruo Gansuo
State analog voltage control module and be respectively provided with a power interface unit, be electrically connected in series respectively with some DC/DC isolation modules
The offer of DC supply is provided.
8. the battery simulator of multi-path high-precision analog signal output as claimed in claim 5, it is characterised in that the electricity
Pond simulator has an analog voltage output interface, and the voltage follower circuit output end of some analog voltage control modules is equal
It is connected in series with the analog voltage output interface, exports high-precision analog voltage.
9. the battery simulator of multi-path high-precision analog signal output as claimed in claim 3, it is characterised in that the electricity
Pond simulator has a power interface being connected in series with external AC, the AC/ of the power interface and the power supply module
DC modular converters are connected in series.
10. the battery simulator of multi-path high-precision analog signal output as claimed in claim 1, it is characterised in that described
Sample circuit module is a voltage sample module or a current sample module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720405105.4U CN206671507U (en) | 2017-04-18 | 2017-04-18 | The battery simulator of multi-path high-precision analog signal output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720405105.4U CN206671507U (en) | 2017-04-18 | 2017-04-18 | The battery simulator of multi-path high-precision analog signal output |
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| CN206671507U true CN206671507U (en) | 2017-11-24 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109459646A (en) * | 2018-12-26 | 2019-03-12 | 深圳市智锂能源科技有限公司 | A kind of lithium battery group analog machine |
| CN110597376A (en) * | 2019-09-12 | 2019-12-20 | 苏州浪潮智能科技有限公司 | Sequencing circuit and sequencing system |
| CN112731189A (en) * | 2021-01-26 | 2021-04-30 | 清华大学 | Battery pack simulation and BMS precision detection system |
-
2017
- 2017-04-18 CN CN201720405105.4U patent/CN206671507U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109459646A (en) * | 2018-12-26 | 2019-03-12 | 深圳市智锂能源科技有限公司 | A kind of lithium battery group analog machine |
| CN110597376A (en) * | 2019-09-12 | 2019-12-20 | 苏州浪潮智能科技有限公司 | Sequencing circuit and sequencing system |
| CN112731189A (en) * | 2021-01-26 | 2021-04-30 | 清华大学 | Battery pack simulation and BMS precision detection system |
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