CN204495901U - A kind of batteries of electric automobile group monomer voltage acquisition system - Google Patents
A kind of batteries of electric automobile group monomer voltage acquisition system Download PDFInfo
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- CN204495901U CN204495901U CN201520169417.0U CN201520169417U CN204495901U CN 204495901 U CN204495901 U CN 204495901U CN 201520169417 U CN201520169417 U CN 201520169417U CN 204495901 U CN204495901 U CN 204495901U
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Abstract
The utility model discloses a kind of batteries of electric automobile group monomer voltage acquisition system, comprise voltage collection circuit, analog to digital converter, controller, code translator, data bus and power circuit, voltage collection circuit comprises signal amplification circuit and multiple gating module, signal amplification circuit comprises differential amplifier and isolated amplifier, multiple gating module is connected with differential amplifier respectively, differential amplifier is connected with isolated amplifier, isolated amplifier is connected with analog to digital converter, power circuit comprises the first power supply, second source, one DC/DC isolation module and the 2nd DC/DC isolation module, first power supply is connected with a DC/DC isolation module, one DC/DC isolation module respectively with isolated amplifier, analog to digital converter, code translator is connected with controller, second source is connected with the 2nd DC/DC isolation module, 2nd DC/DC isolation module is connected with differential amplifier and isolated amplifier respectively, advantage is that interference free performance is better, and operational reliability is higher.
Description
Technical field
The utility model relates to a kind of System of voltage acquisition, especially relates to a kind of batteries of electric automobile group monomer voltage acquisition system.
Background technology
Electric automobile adopts battery-powered usually.Lithium battery has that operating voltage is high, specific energy is large, have extended cycle life and free of contamination advantage, and existing batteries of electric automobile group is made up of multiple lithium battery usually.Each lithium battery is a monomer, and in electric battery, the characteristic of each lithium battery can not be completely the same.Electric battery after a period of operation, property difference between each lithium battery is more obvious, thus, each lithium battery just there will be energy imbalance when filling a little and discharge, during the lithium cell charging namely had, voltage reaches upper voltage limit, and some lithium batteries also do not reach upper voltage limit, so just there will be indivedual lithium battery and exceedes its upper voltage limit, just there will be security incident when acquiring a certain degree, there is potential safety hazard.In order to eliminate battery-powered potential safety hazard, mainly through batteries management system, lithium battery each in electric battery being monitored and dividing mobile equilibrium at present.Batteries of electric automobile group monomer voltage acquisition system as the core of batteries management system, for gathering the voltage of each lithium battery in electric battery.
As shown in Figure 1, existing batteries of electric automobile group monomer voltage acquisition system generally includes voltage collection circuit, analog to digital converter, controller, code translator, data bus and data output circuit, voltage collection circuit comprises signal amplification circuit and multiple gating module, multiple gating module and multiple lithium battery are corresponding one to one to be connected, multiple gating module is connected with code translator and signal amplification circuit respectively, signal amplification circuit is connected with analog to digital converter, analog to digital converter, controller is connected with data bus respectively with code translator, controller is connected with data output circuit, power supply is by providing signal amplification circuit after DC/DC buffer circuit, analog to digital converter, the operating voltage of controller and code translator, gating module adopts electronic switch usually, and signal amplification circuit adopts signal amplifier usually.
There is following problem in existing batteries of electric automobile group monomer voltage acquisition system: the signal of gating module collection is directly inputted in analog to digital converter after signal amplifier amplification process, cause System of voltage acquisition interference free performance poor thus, operational reliability is not high.
Summary of the invention
It is better that technical problem to be solved in the utility model is to provide a kind of interference free performance, the batteries of electric automobile group monomer voltage acquisition system that operational reliability is higher.
The utility model solves the problems of the technologies described above adopted technical scheme: a kind of batteries of electric automobile group monomer voltage acquisition system, comprise voltage collection circuit, analog to digital converter, controller, code translator, data bus and power circuit, described voltage collection circuit comprises signal amplification circuit and multiple gating module, multiple gating module is connected with described code translator respectively, described analog to digital converter, described code translator is connected with described data bus respectively with described controller, described signal amplification circuit comprises differential amplifier and isolated amplifier, multiple gating module is connected with described differential amplifier respectively, described differential amplifier is connected with described isolated amplifier, described isolated amplifier is connected with described analog to digital converter, described power circuit comprises the first power supply, second source, one DC/DC isolation module and the 2nd DC/DC isolation module, the first described power supply is connected with a described DC/DC isolation module, a described DC/DC isolation module respectively with described isolated amplifier, described analog to digital converter, described code translator is connected with described controller, described second source is connected with the 2nd described DC/DC isolation module, the 2nd described DC/DC isolation module is connected with described differential amplifier and described isolated amplifier respectively.
Described gating module comprises photoelectric relay, and described photoelectric relay is connected with described code translator and described differential amplifier respectively.This structure adopts photoelectric relay to replace electronic switch of the prior art, ensure that linearity when gathering Width funtion, and photoelectric relay have employed the mode of multichannel Time share scanning, improves the efficiency of single lithium battery voltage sample, has saved hardware cost.
Described batteries of electric automobile group monomer voltage acquisition system also comprises for carrying out the data output circuit of data communication with outside, described data output circuit comprises communication bus isolator and communication module, described communication bus isolator is connected with described communication module, described controller and a described DC/DC isolation module respectively, and described communication module is 485 communication modules or CAN.This structure adopts communication bus isolator to realize entirely isolating communication modes, makes external communication terminal and monomer voltage acquisition system not have electric contacting, adds the reliability of communication, improve communication speed.
Compared with prior art, the utility model has the advantage of by adopting the first separate power supply and second source to power to system, simultaneously, the signal of gating circuit collection is processed by differential amplifier and isolated amplifier successively, thus by electric battery high pressure major loop isolation in monomer voltage acquisition system, solve the interference of high direct voltage loop to sampling system, interference free performance is better, and operational reliability is higher.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the monomer voltage acquisition system of prior art;
Fig. 2 is the circuit theory diagrams of monomer voltage acquisition system of the present utility model;
Fig. 3 is a kind of circuit structure diagram of voltage collection circuit in monomer voltage acquisition system of the present utility model.
Embodiment
Below in conjunction with accompanying drawing embodiment, the utility model is described in further detail.
Embodiment: as shown in Figure 2, a kind of batteries of electric automobile group monomer voltage acquisition system, comprise voltage collection circuit, analog to digital converter 1, controller 2, code translator 3, data bus and power circuit, voltage collection circuit comprises signal amplification circuit and multiple gating module, multiple gating module is not connected with code translator 3 by emulation bus, analog to digital converter 1, controller 2 is connected with data bus respectively with code translator 3, signal amplification circuit comprises differential amplifier and isolated amplifier, multiple gating module is connected with differential amplifier by emulation bus, differential amplifier is connected with isolated amplifier, isolated amplifier is connected with analog to digital converter 1, power circuit comprises the first power supply, second source, one DC/DC isolation module and the 2nd DC/DC isolation module, first power supply is connected with a DC/DC isolation module, one DC/DC isolation module respectively with isolated amplifier, analog to digital converter 1, code translator 3 is connected with controller 2, second source is connected with the 2nd DC/DC isolation module, 2nd DC/DC isolation module is connected with differential amplifier and isolated amplifier respectively.
In the present embodiment, gating module comprises photoelectric relay, and photoelectric relay is connected with code translator 3 and differential amplifier respectively.
In the present embodiment, batteries of electric automobile group monomer voltage acquisition system also comprises for carrying out the data output circuit of data communication with outside, data outputting module comprises communication bus isolator and communication module, communication bus isolator is connected with communication module, controller 2 and a DC/DC isolation module respectively, and communication module is 485 communication modules or CAN.
In batteries of electric automobile group monomer voltage acquisition system of the present utility model, voltage collection circuit can adopt the circuit structure shown in Fig. 3 to realize.
The principle of work of batteries of electric automobile group monomer voltage acquisition system of the present utility model is: the quantity of gating module is identical with the quantity of lithium battery in electric battery, each gating module is for gathering the voltage of a lithium battery, and controller 2 controls the voltage that gating module gathers multiple lithium battery in order successively.When starting to gather, photoelectric relay in first gating circuit closes, the voltage signal of first lithium battery flows to emulation bus by this photoelectric relay, voltage signal is sent into differential amplifier and is carried out coupling processing by emulation bus, voltage signal after coupling processing is delivered to isolated amplifier and is carried out isolation amplification process, voltage signal after process is amplified in isolation is delivered to analog to digital converter 1 again and is carried out analog to digital conversion, controller 2 is passed to after conversion, controller 2 is by the next gating module of code translator 3 successively gating, be cycled to repeat said process thus obtain the monomer voltage digital signal of each lithium battery.
Claims (3)
1. a batteries of electric automobile group monomer voltage acquisition system, comprise voltage collection circuit, analog to digital converter, controller, code translator, data bus and power circuit, described voltage collection circuit comprises signal amplification circuit and multiple gating module, multiple gating module is connected with described code translator respectively, described analog to digital converter, described code translator is connected with described data bus respectively with described controller, it is characterized in that described signal amplification circuit comprises differential amplifier and isolated amplifier, multiple gating module is connected with described differential amplifier respectively, described differential amplifier is connected with described isolated amplifier, described isolated amplifier is connected with described analog to digital converter, described power circuit comprises the first power supply, second source, one DC/DC isolation module and the 2nd DC/DC isolation module, the first described power supply is connected with a described DC/DC isolation module, a described DC/DC isolation module respectively with described isolated amplifier, described analog to digital converter, described code translator is connected with described controller, described second source is connected with the 2nd described DC/DC isolation module, the 2nd described DC/DC isolation module is connected with described differential amplifier and described isolated amplifier respectively.
2. a kind of batteries of electric automobile group monomer voltage acquisition system according to claim 1, it is characterized in that described gating module comprises photoelectric relay, described photoelectric relay is connected with described code translator and described differential amplifier respectively.
3. a kind of batteries of electric automobile group monomer voltage acquisition system according to claim 1, it is characterized in that described batteries of electric automobile group monomer voltage acquisition system also comprises for carrying out the data output circuit of data communication with outside, described data output circuit comprises communication bus isolator and communication module, described communication bus isolator is connected with described communication module, described controller and a described DC/DC isolation module respectively, and described communication module is 485 communication modules or CAN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520169417.0U CN204495901U (en) | 2015-03-25 | 2015-03-25 | A kind of batteries of electric automobile group monomer voltage acquisition system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520169417.0U CN204495901U (en) | 2015-03-25 | 2015-03-25 | A kind of batteries of electric automobile group monomer voltage acquisition system |
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| Publication Number | Publication Date |
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| CN204495901U true CN204495901U (en) | 2015-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520169417.0U Expired - Fee Related CN204495901U (en) | 2015-03-25 | 2015-03-25 | A kind of batteries of electric automobile group monomer voltage acquisition system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106501581A (en) * | 2016-12-29 | 2017-03-15 | 洛阳宝盈智控科技有限公司 | Multigroup independent battery group voltage collection circuit |
| CN110609242A (en) * | 2019-10-31 | 2019-12-24 | 安徽江淮汽车集团股份有限公司 | Monomer voltage acquisition circuit, method and device |
-
2015
- 2015-03-25 CN CN201520169417.0U patent/CN204495901U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106501581A (en) * | 2016-12-29 | 2017-03-15 | 洛阳宝盈智控科技有限公司 | Multigroup independent battery group voltage collection circuit |
| CN110609242A (en) * | 2019-10-31 | 2019-12-24 | 安徽江淮汽车集团股份有限公司 | Monomer voltage acquisition circuit, method and device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 315800 Ningbo City, bonded West Road, No. 1, No. 11 Patentee after: Ningbo bate technology Limited by Share Ltd Address before: 315800 Ningbo City, bonded West Road, No. 1, No. 11 Patentee before: Ningbo Bate Technology Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150722 Termination date: 20200325 |