CN208986661U - A kind of battery Bidirectional charging-discharging equipment - Google Patents
A kind of battery Bidirectional charging-discharging equipment Download PDFInfo
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- CN208986661U CN208986661U CN201821563175.3U CN201821563175U CN208986661U CN 208986661 U CN208986661 U CN 208986661U CN 201821563175 U CN201821563175 U CN 201821563175U CN 208986661 U CN208986661 U CN 208986661U
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Abstract
The utility model discloses a kind of battery Bidirectional charging-discharging equipment, it further include D.C. contactor KM3, D.C. contactor KM4, insulation shunts variable resistance R4, insulation shunts variable resistance R5 and diverting switch K5 including transformer, reversible AC-DC module, bi-directional DC-DC module, detection unit and control unit.The utility model charging/discharging apparatus is able to carry out comprehensively and effectively insulation impedance detection, prevents operating personnel's electric shock, reduce production risk, protection staff and test equipment, improve the safety and reliability that charging/discharging apparatus uses before carrying out charge and discharge to battery.
Description
Technical field
The utility model relates to battery charging and discharging technical fields, the in particular to Insulation monitoring of battery Bidirectional charging-discharging equipment
Device.
Background technique
The high speed development of power energy storage, electric car, to battery detection equipment, more stringent requirements are proposed, in international big ring
In border, the competition of supply chain, product quality and reliability are particularly important, in this competition, battery detecting
Equipment has been mentioned an extremely important position, and the quality of equipment will directly affect the quality, qualification rate, production efficiency of product
And safety.Important equipment of the battery test apparatus as battery detecting department and cell production companies, extremely to its security performance
It is important.It is well known that battery detection equipment is just being grounded during external force, adverse circumstances and aging there are power supply or power supply
The possibility of negative ground connection, if cannot accurately detect that the insulation impedance of equipment or equipment are exhausted when carrying out to battery charging and discharging
There are blind areas for edge detection, it would be possible to damage to tester, cause equipment damage.
Summary of the invention
To solve, current battery charging/discharging apparatus naked impedance detection or insulation impedance detection be not comprehensive, there are blind
The problems such as point, the utility model provides a kind of battery Bidirectional charging-discharging equipment, carries out battery testing using the utility model device
When, it is not necessarily to external detection device, it will be able to reliably detect the insulation impedance of charging/discharging apparatus.
The utility model specifically adopts the following technical scheme that
A kind of battery Bidirectional charging-discharging equipment, including sequentially connected transformer, reversible AC-DC module and bi-directional DC-DC
Module, it is characterised in that further include controllable D.C. contactor KM3, D.C. contactor KM4, insulation shunt variable resistance R4, absolutely
Fate stream variable resistance R5 and controllable diverting switch K5；One end connection bi-directional DC-DC module of the D.C. contactor KM3
Positive output end, the other end connect the anode of battery group；One end connection bi-directional DC-DC module of the D.C. contactor KM4
Negative output terminal, the other end connect the cathode of battery group；The insulation shunts variable resistance R4 and insulation shunts variable resistance R5
It is serially connected, insulation shunts the anode of one end connection battery group of variable resistance R4, and insulation shunts one end of variable resistance R5
The cathode of battery group is connected, the series side of two resistance is grounded by diverting switch K5；Battery Bidirectional charging-discharging equipment is also wrapped
Detection unit and control unit are included, electric signal required for detection unit is controlled for acquisition system is simultaneously transmitted to control unit, controls
Unit processed realizes that equipment charge and discharge control and Insulation monitoring control according to the electric signal of upload.
Beneficial effect
The utility model charging/discharging apparatus, is integrated with insulation detection device, before carrying out charge and discharge to battery, does not need outer
Connect detection device, it will be able to realize that comprehensively and effectively insulation impedance detects, and prevents operating personnel's electric shock, reduce production risk, protect
Shield personnel and test equipment improve the safety and reliability that charging/discharging apparatus uses.
Detailed description of the invention
Fig. 1: battery Bidirectional charging-discharging circuitry topology
Fig. 2: circuit topology simplification figure one；
Fig. 3: circuit topology simplification figure two；
Fig. 4: circuit topology simplification figure three.
Specific embodiment
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in example is applied, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described implementation
Example is merely a part but not all of the embodiments of the present application.Based on the embodiment in the application, this field is common
The application protection all should belong in technical staff's every other embodiment obtained without creative efforts
Range
Battery Bidirectional charging-discharging equipment schematic is as shown in Figure 1:
Circuit topological structure includes transformer, reversible AC-DC module, bi-directional DC-DC module, insulation resistance detection device.
Reversible AC-DC module mainly realizes rectification and inversion, is battery discharge in inversion, exports energy to power grid；Rectification when from
Power grid exports energy, charges for battery.Bi-directional DC-DC module mainly realizes boosting and decompression when giving battery charging and discharging.Insulation
Impedance detection device mainly realizes the Insulation monitoring of charging/discharging apparatus.In addition, battery Bidirectional charging-discharging equipment further includes that detection is single
Member and control unit, electric signal required for detection unit is controlled for acquisition system are simultaneously transmitted to control unit, control unit root
Equipment charge and discharge control and Insulation monitoring control are realized according to the electric signal of upload.
Wherein reversible AC-DC module is mainly made of the three phase inverter bridge that controllable switch device Q1~Q12 is formed, and passes through change
Depressor T1 is connected to power grid.The full-bridge circuit structure that bi-directional DC-DC module is mainly made of controllable switch device Q13~Q16
At to load R3 and battery after the filter circuit filtering that the output of full-bridge circuit is formed through inductance L7, L8 and capacitor C7
Group.Insulation resistance detection device has used the switching device Q15 (derailing switch of bridge arm on the second bridge arm in bi-directional DC-DC module
Part), furthermore insulation resistance detection device further include D.C. contactor KM3, D.C. contactor KM4, insulation shunt variable resistance R4,
Insulation shunts variable resistance R5 and diverting switch K5.The positive output of one end connection bi-directional DC-DC module of D.C. contactor KM3
End, the other end connect the anode of battery group.The negative output terminal of one end connection bi-directional DC-DC module of D.C. contactor KM4, separately
The cathode of one end connection battery group.Insulation shunts variable resistance R4 and insulation shunting variable resistance R5 and is serially connected, insulation point
The anode of one end connection battery group of variable resistance R4 is flowed, insulation shunts the negative of one end connection battery group of variable resistance R5
The series side of pole, two resistance meets the earth PE by diverting switch K5.D.C. contactor KM3, D.C. contactor KM4, it shunts and opens
It closes K5 and is all connected to control unit, be switched on or off by control unit control.
Resistance Rx, the Ry in insulation resistance such as main topological diagram for needing to detect, wherein Rx is that DC+ hinders the insulation of the earth PE
Anti-, Ry is insulation impedance of the DC- to the earth PE.DC+ is the voltage of DC-DC module positive input terminal, and DC- bears defeated for DC-DC module
Enter the voltage at end.
The Insulation monitoring control of the utility model charging/discharging apparatus is realized that insulation impedance testing principle is such as by control unit
Under:
Step 1: detection unit detects initial voltage of battery V1, is transmitted to control unit；
Step 2: control unit is closed KM3, KM4, and detection unit detects DC+ to the voltage V2 of PE, detects DC- to PE's
Voltage V3, is transmitted to control unit, when | V1- (V2+V3) | >=V0, control unit reporting system insulation fault is abnormal, otherwise continues to hold
Row is in next step.Theoretically V1- (V2+V3)=0V, therefore V0 should be smaller, general V0 recommended setting be less than or equal to 10V, according to
Actual conditions can be adjusted.
Step 3: when | V1- (V2+V3) | < V0, detection unit detect DC+ to the voltage V4 of PE, detect DC- to PE voltage
V5 is transmitted to control unit, can obtain Fig. 2 according to main topological Simplification, is 0 according to node current, can obtain equation 1:V4/Rx=V5/Ry
Step 4: on the basis of previous step detection, control unit is closed Q15, and (under detection pattern, other switching devices are equal
Disconnect, other each modules do not work), detection unit detects DC+ to the voltage V6 of PE, detects DC- to the voltage V7 of PE, is transmitted to control
Unit processed, control unit judge whether system is normal according to the voltage data of detection: when | V4/V5-V6/V7 | (X% when≤X%
General recommended setting is less than or equal to 5%), and decision-making system is normal, otherwise decision-making system Abnormal Insulation, no longer carries out insulation inspection
It surveys.According to simplified electrical circuit diagram 3 when being closed Q15, equation 2:V6/Rx=V7/Ry is obtained.
Step 5: on the basis of system is normal, control unit is closed diverting switch K5, and detection unit detects DC+ to PE
Voltage V8, detect DC- to PE voltage V9, be transmitted to control unit.It is 0 according to simplified electrical circuit diagram 4 and node current, obtains equation
3:V8/ (Rx ‖ R4)=V9/ (Ry ‖ R5).
Step 6: control unit disconnects Q15, KM3, KM4, K5.
Step 7: selection equation 1 or the one of equation of equation 2 and equation 3 form equation group, solve insulation impedance
Rx, Ry.By taking simultaneous equations 2 and equation 3 as an example:
V6/Rx=V7/Ry
V8/ (Rx ‖ R4)=V9/ (Ry ‖ R5) is solved equation:
Control unit judges whether insulation impedance meets the requirements according to the insulation impedance value being calculated, it is general there are two types of
Judgment mode, first way, single judgement illustrate that insulation impedance is met the requirements as Rx, Ry both greater than setting insulation resistance R,
Otherwise it is unsatisfactory for.Second method, as parallel resistance Rx | | Ry is greater than the set value R, meets insulating requirements, is otherwise unsatisfactory for.It closes
In the setting of R, generally require the leakage current of 1KV system no more than 30mA, therefore insulation impedance R generally requires to be more than or equal to 33K
Ω。
Claims (3)
1. a kind of battery Bidirectional charging-discharging equipment, including sequentially connected transformer, reversible AC-DC module and bi-directional DC-DC mould
Block, it is characterised in that further include controllable D.C. contactor KM3, D.C. contactor KM4, insulation shunting variable resistance R4, insulation
Shunt variable resistance R5 and controllable diverting switch K5；One end connection bi-directional DC-DC module of the D.C. contactor KM3 is just
Output end, the other end connect the anode of battery group；One end connection bi-directional DC-DC module of the D.C. contactor KM4 is born
Output end, the other end connect the cathode of battery group；The insulation shunts variable resistance R4 and shunts variable resistance R5 phase with insulation
Mutually series connection, insulation shunt the anode of one end connection battery group of variable resistance R4, and one end that insulation shunts variable resistance R5 connects
The cathode of battery group is connect, the series side of two resistance is grounded by diverting switch K5；Battery Bidirectional charging-discharging equipment further includes
Detection unit and control unit, electric signal required for detection unit is controlled for acquisition system are simultaneously transmitted to control unit, control
Unit realizes that equipment charge and discharge control and Insulation monitoring control according to the electric signal of upload.
2. battery Bidirectional charging-discharging equipment as described in claim 1, it is characterised in that the bi-directional DC-DC module is mainly by can
The full-bridge circuit for controlling switching device Q13~Q16 composition is constituted, wherein controllable switch device Q13 and controllable switch device Q14
First bridge arm of composition, the second bridge arm of controllable switch device Q15 and controllable switch device Q16 composition, full-bridge circuit
The filter that form through inductance L7, inductance L8 and capacitor C7 is exported to loading R3 and battery group.
3. battery Bidirectional charging-discharging equipment as described in claim 1, it is characterised in that the reversible AC-DC module is mainly by can
The three phase inverter bridge for controlling switching device Q1~Q12 composition is constituted, and ac bus end is connected to power grid by transformer, and direct current is female
Line end is connected to bi-directional DC-DC module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821563175.3U CN208986661U (en) | 2018-09-20 | 2018-09-20 | A kind of battery Bidirectional charging-discharging equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821563175.3U CN208986661U (en) | 2018-09-20 | 2018-09-20 | A kind of battery Bidirectional charging-discharging equipment |
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| CN208986661U true CN208986661U (en) | 2019-06-14 |
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| CN201821563175.3U Active CN208986661U (en) | 2018-09-20 | 2018-09-20 | A kind of battery Bidirectional charging-discharging equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109103975A (en) * | 2018-09-20 | 2018-12-28 | 江苏为恒智能科技有限公司 | A kind of battery Bidirectional charging-discharging equipment with Insulation monitoring function |
| CN112389215A (en) * | 2019-08-16 | 2021-02-23 | 比亚迪股份有限公司 | Charging and discharging circuit structure, charging and discharging equipment, charging and discharging system and charging and discharging method |
-
2018
- 2018-09-20 CN CN201821563175.3U patent/CN208986661U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109103975A (en) * | 2018-09-20 | 2018-12-28 | 江苏为恒智能科技有限公司 | A kind of battery Bidirectional charging-discharging equipment with Insulation monitoring function |
| CN109103975B (en) * | 2018-09-20 | 2024-03-26 | 江苏为恒智能科技有限公司 | Battery bidirectional charging and discharging equipment with insulation detection function |
| CN112389215A (en) * | 2019-08-16 | 2021-02-23 | 比亚迪股份有限公司 | Charging and discharging circuit structure, charging and discharging equipment, charging and discharging system and charging and discharging method |
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