CN203882162U - Digital current-sharing system for charging and discharging equipment of power battery - Google Patents
Digital current-sharing system for charging and discharging equipment of power battery Download PDFInfo
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- CN203882162U CN203882162U CN201320849121.4U CN201320849121U CN203882162U CN 203882162 U CN203882162 U CN 203882162U CN 201320849121 U CN201320849121 U CN 201320849121U CN 203882162 U CN203882162 U CN 203882162U
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- current
- test apparatus
- position machine
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- battery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The utility model discloses a digital current-sharing system for charging and discharging equipment of a power battery, and the system comprises an upper computer PC, battery testing equipment 1, battery testing equipment 2, and a power battery pack. The battery testing equipment 1 comprises a central computer 1, a DC/DC converter 1, and a PWM rectifier 1. The system provided by the utility model achieves the stable operation of a parallel connection system of battery testing equipment, and determines the parallel number and the addresses of all nodes of a current system through the cooperation of an equipment external bus with a current-sharing bus. The system provided by the utility model guarantees the successful current-sharing operation of equipment, and prevents a current-sharing failure caused by current-sharing unevenness.
Description
Technical field
The utility model relates to a kind of digital current-sharing system for electrokinetic cell charging/discharging apparatus, belongs to power battery pack and discharges and recharges technical field.
Background technology
At present, along with the rise of the New Energy Industries such as wind-power electricity generation, photovoltaic generation and electric automobile, large power energy storage system, especially power battery pack has obtained application more and more widely.Meanwhile, also day by day received concern as the battery charging and discharging technology of battery energy storage gordian technique.In actual applications, the power density of large capacity bidirectional transformation system has been proposed to more and more higher requirement, in order to realize jumbo power conversion, often by unit or single module according to certain parallel way, reach respectively the object of output current and output power expansion.
For the parallel system of bidirectional power converter composition, due to problems such as battery cell performance, two-way DC/DC transducer and line parameter circuit values, in parallel running process, there will be the problem of the distribution inequality of load current, therefore, in power ratio control two-way flow, also need to solve the current uniform problem of unit.
For the equipment that has adopted current sharing control technology, system only need to increase module or unit quantity just can be carried out dilatation easily as required, greatly reduce the design cycle, reduced design cost, also can carry out maintenance and repair to equipment more easily.At present, no matter be current equalizing bus bar formation method, or control mode has all obtained certain development: the most frequently used current equalizing bus bar formation method has: three kinds of principal and subordinate's Source Methods, Averaged Current Automatic Current Sharing method, maximum current automatic current equalizing method.Control method has: outer shroud regulates, interior ring regulates, single busbar structure dicyclo regulates and double-bus structure dicyclo regulates totally four kinds of methods.Especially for controlling comparatively ripe equal flow algorithm, there is special control chip, greatly simplified control circuit.Meanwhile, due to developing rapidly of single-chip microcomputer and DSP technology, control power module current-sharing in parallel and also realized digitizing, intelligent control.
But existing traditional technical scheme is all the flow equalize technology for conventional switching power supply mostly, even if the sharing control algorithm that has pair bidirectional power converter to implement also lacks the flow equalize technology scheme for electric battery operating characteristic specially.The control of this ignorance battery behavior often can or can not be received good current-sharing effect, even can cause parallel running.So the exploitation innovation for the technical scheme of power battery pack charging/discharging apparatus parallel current-sharing is extremely urgent.
Utility model content
The purpose of this utility model is to provide a kind of digital current-sharing system for electrokinetic cell charging/discharging apparatus that can overcome above-mentioned technical matters, and the utility model has been realized the sharing control of battery charging and discharging equipment to power battery pack under different conditions; According in battery set charge/discharge process, at the isoparametric Changing Pattern of voltage, electric current of different phase, battery charging and discharging equipment adopts different control technology schemes, meets to greatest extent the charge-discharge characteristic of electric battery.
A kind of digital current-sharing system for electrokinetic cell charging/discharging apparatus of the present utility model comprises: host computer PC, battery test apparatus 1, battery test apparatus 2, power battery pack; Described battery test apparatus 1 comprises: middle-position machine 1, DC/DC transducer 1, PWM rectifier 1; Described battery test apparatus 2 comprises: middle-position machine 2, DC/DC transducer 2, PWM rectifier 2; Described host computer PC is connected with middle-position machine 1 and middle-position machine 2 respectively; Described middle-position machine 1 and middle-position machine 2 interconnect; Described middle-position machine 1 is connected with PWM rectifier 1 and DC/DC transducer 1 respectively; Described PWM rectifier 1 is connected with DC/DC transducer 1; Described middle-position machine 2 is connected with PWM rectifier 2 and DC/DC transducer 2 respectively; Described PWM rectifier 2 is connected with DC/DC transducer 2; The lead-out terminal positive pole of described battery test apparatus 1 and described battery test apparatus 2 is connected with the anode of described power battery pack respectively; The lead-out terminal negative pole of described battery test apparatus 1 and described battery test apparatus 2 is connected with the battery cathode of described power battery pack respectively.
The host computer PC of a kind of digital current-sharing system for electrokinetic cell charging/discharging apparatus of the present utility model issues equipment by external bus to the middle-position machine of every equipment and moves total parameter, receive the internal bus of middle-position machine forwarding and the service data of the total built-in unit of current-sharing, watch-dog running status simultaneously;
The device interior of a kind of digital current-sharing system for electrokinetic cell charging/discharging apparatus of the present utility model by middle-position machine by internal bus forward from external bus receive and the control parameter that obtains of current-sharing bus to power conversion module, receive the operational factor that slave computer PWM rectifier and DC/DC transducer are uploaded simultaneously;
Equal flow data between the equipment in parallel of a kind of digital current-sharing system for electrokinetic cell charging/discharging apparatus of the present utility model exchanges by the current-sharing bus between middle-position machine.
Before equipment parallel running, need clearer and more definite information, equipment could carry out power conversion under unified control of host computer PC.Therefore, a safe and reliable licensing scheme is equipment success parallel running important prerequisite.
The utility model is for the technical scheme of the equal stream mode under equal stream mode, constant voltage mode under the constant current mode of the characteristic of electric battery and the equal stream mode under permanent power mode, the curvilinear motion characteristic in battery charge and discharge process of well having coincide, the different flow equalize technology schemes of differentiation pattern, ensure current-sharing effect, prevented that between different units, shunting inequality causes in parallel failed situation.Flow equalize technology scheme under above-mentioned three kinds of patterns is as follows:
1) constant current mode; Under this pattern, the Voltage loop of battery test apparatus is in open loop phase, if indivedual unit output currents are on the low side or higher, by by its sample rate current and instruction current ratio after, corresponding revision directive electric current can ensure the output of each unit maintain instruction current up and down near;
2) constant voltage mode; Under this pattern, the electric current loop of battery test apparatus is in open loop phase, each unit in parallel can be received by current-sharing bus the output current of other equipment, obtain equal flow reference signal according to set algorithm, this signal and output current relatively after, more corresponding revision directive voltage can ensure the output current approximately equal of each unit;
3) permanent power mode; Under this pattern, the Voltage loop of battery test apparatus is in open loop phase, and its instruction current is to be calculated by instruction power and current battery voltage, obtain equal flow reference signal according to set algorithm, this signal and the current value ratio that obtained by instruction power after, more corresponding corrected output instruction can ensure the output current approximately equal of each unit.
The utility model has the advantages that the stable operation that has realized battery test apparatus parallel system, and system dynamic current equalizing characteristic is good; By the cooperation of device external bus and current-sharing bus, complete the parallel connection mandate work before equipment power stage in parallel, determine number in parallel and each node address of current system; Prevent the situation because shunting the current-sharing failure that inequality causes.
Brief description of the drawings
Fig. 1 is the one-piece construction schematic diagram of a kind of digital current-sharing system for electrokinetic cell charging/discharging apparatus described in the utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in detail.As shown in Figure 1, the utility model comprises: host computer PC, battery test apparatus 1, battery test apparatus 2, power battery pack; Described battery test apparatus 1 comprises: middle-position machine 1, DC/DC transducer 1, PWM rectifier 1; Described battery test apparatus 2 comprises: middle-position machine 2, DC/DC transducer 2, PWM rectifier 2; Described host computer PC is connected with middle-position machine 1 and middle-position machine 2 respectively; Described middle-position machine 1 and middle-position machine 2 interconnect; Described middle-position machine 1 is connected with PWM rectifier 1 and DC/DC transducer 1 respectively; Described PWM rectifier 1 is connected with DC/DC transducer 1; Described middle-position machine 2 is connected with PWM rectifier 2 and DC/DC transducer 2 respectively; Described PWM rectifier 2 is connected with DC/DC transducer 2; The lead-out terminal positive pole of described battery test apparatus 1 and described battery test apparatus 2 is connected with the anode of described power battery pack respectively; The lead-out terminal negative pole of described battery test apparatus 1 and described battery test apparatus 2 is connected with the battery cathode of described power battery pack respectively.
1) parallel system of the present utility model adopts the structure of three communication buses:
1. external bus; Every battery charging and discharging equipment carries out communication by external bus and host computer PC;
2. internal bus; Every battery charging and discharging device interior arranges middle-position machine, is responsible for issuing the steering order of power conversion unit-AC/DC and DC/DC two-stage by internal bus;
3. current-sharing bus; Between different battery charging and discharging equipment, when parallel running, by this current-sharing bus switch equipment operational factor, calculate in real time sharing control parameter.
Said external bus, internal bus, this three-bus co-ordination of current-sharing bus, guaranteed the timely exchange of equipment operational factors at different levels, and real-time parameter, has ensured well-equipped dynamic response and current-sharing effect;
The utility model adopts the technical scheme of above-mentioned this differentiated treatment, makes current-sharing process better meet the operating characteristic of electric battery.
The above; it is only embodiment of the present utility model; but protection domain of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the utility model scope of disclosure; the variation that can expect easily or replacement, all should be encompassed in the protection domain of the utility model claim.
Claims (1)
1. for a digital current-sharing system for electrokinetic cell charging/discharging apparatus, comprising: host computer PC, battery test apparatus 1, battery test apparatus 2, power battery pack; Described battery test apparatus 1 comprises: middle-position machine 1, DC/DC transducer 1, PWM rectifier 1; Described battery test apparatus 2 comprises: middle-position machine 2, DC/DC transducer 2, PWM rectifier 2; Described host computer PC is connected with middle-position machine 1 and middle-position machine 2 respectively; Described middle-position machine 1 and middle-position machine 2 interconnect; Described middle-position machine 1 is connected with PWM rectifier 1 and DC/DC transducer 1 respectively; Described PWM rectifier 1 is connected with DC/DC transducer 1; Described middle-position machine 2 is connected with PWM rectifier 2 and DC/DC transducer 2 respectively; Described PWM rectifier 2 is connected with DC/DC transducer 2; The lead-out terminal positive pole of described battery test apparatus 1 and described battery test apparatus 2 is connected with the anode of described power battery pack respectively; The lead-out terminal negative pole of described battery test apparatus 1 and described battery test apparatus 2 is connected with the battery cathode of described power battery pack respectively, meanwhile, adopted the technical scheme for the equal stream mode under the equal stream mode under the constant current mode of the characteristic of electric battery, equal stream mode and permanent power mode under constant voltage mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320849121.4U CN203882162U (en) | 2013-12-20 | 2013-12-20 | Digital current-sharing system for charging and discharging equipment of power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320849121.4U CN203882162U (en) | 2013-12-20 | 2013-12-20 | Digital current-sharing system for charging and discharging equipment of power battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203882162U true CN203882162U (en) | 2014-10-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320849121.4U Withdrawn - After Issue CN203882162U (en) | 2013-12-20 | 2013-12-20 | Digital current-sharing system for charging and discharging equipment of power battery |
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| Country | Link |
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| CN (1) | CN203882162U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103676895A (en) * | 2013-12-20 | 2014-03-26 | 优科新能源科技有限公司 | Digital current equalizing system and digital current equalizing method for power battery charging and discharging equipment |
-
2013
- 2013-12-20 CN CN201320849121.4U patent/CN203882162U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103676895A (en) * | 2013-12-20 | 2014-03-26 | 优科新能源科技有限公司 | Digital current equalizing system and digital current equalizing method for power battery charging and discharging equipment |
| CN103676895B (en) * | 2013-12-20 | 2017-03-15 | 优科新能源科技有限公司 | A kind of digital current-sharing system and method for electrokinetic cell charging/discharging apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141015 Effective date of abandoning: 20171114 |
|
| AV01 | Patent right actively abandoned |