CN105911352A - Tester for measuring insulation resistance of power battery - Google Patents
Tester for measuring insulation resistance of power battery Download PDFInfo
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- CN105911352A CN105911352A CN201610227816.7A CN201610227816A CN105911352A CN 105911352 A CN105911352 A CN 105911352A CN 201610227816 A CN201610227816 A CN 201610227816A CN 105911352 A CN105911352 A CN 105911352A
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- relay
- voltage
- resistance
- insulation resistance
- power battery
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/025—Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters
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- Measurement Of Resistance Or Impedance (AREA)
Abstract
The invention discloses a tester for measuring insulation resistance of a power battery. The tester is characterized by comprising the components of a testing unit which comprises a relay assembly, a voltmeter and a first reference resistor, wherein the first pin of the testing unit is connected with the anode of a to-be-tested power battery, the second pin of the testing unit is connected with the cathode of the to-be-tested power battery, and the third pin of the testing unit is grounded; a controlling unit which is used for switching on or switching off the relay assembly, thereby obtaining a first voltage, a second voltage and a reference voltage; a logical unit which is used for obtaining the insulation resistance of the to-be-tested power battery according to the first voltage, the second voltage, the first reference voltage and the first reference resistor; and a display unit which is used for displaying the insulation resistance of the to-be-tested power battery. The tester has advantages of greatly simplifying testing operation process and improving operation efficiency, thereby realizing automatic testing on the insulation resistance of the power battery.
Description
Technical field
The present invention relates to electric vehicle engineering field, particularly to a kind of test for measuring power battery insulation resistance
Instrument.
Background technology
In order to avoid or reduce electric automobile potential safety hazard, need its security reliability carrying out comprehensive and reasonable is tested
Card.And electrokinetic cell system is as the critical component of electric automobile, essential to its test.China released in May, 2015
Security test standard GB/T31467.3-2015 of battery system, is directed to vibration test, impact test, falls examination
Test, roll-over test, simulated collision test, squeeze test, temperature shock test, moisture and hot ageing are tested, sea water immersion is tested, outside
16 peaces such as bonfire test, salt spray test, altitude test, overheat protector, short-circuit protection, additives for overcharge protection, over
Full reliability test content, and above-mentioned test is required to measure electrokinetic cell system insulation resistance value after test.Current survey
The examination usual accepted standard of battery system insulation resistance value is GB/T18384.1-2015, especially by corresponding resistance in parallel in circuit
The resistance of value carries out insulation measurement to electrokinetic cell system.
But, in each test process, parallel resistance junction point is insecure typically results in test error.Meanwhile, need
The voltage that manual record voltmeter gathers, and then calculate resistance value again, complex operation, inefficiency.
Therefore, correlation technique needs to improve.
Summary of the invention
It is contemplated that one of technical problem solved the most to a certain extent in correlation technique.To this end, the present invention
Purpose is to propose a kind of tester for measuring power battery insulation resistance.
In order to achieve the above object, the embodiment of the present invention proposes a kind of test for measuring power battery insulation resistance
Instrument, comprises: test cell, comprises relay assembly, voltmeter and the first reference resistance, wherein, the first of described test cell
Pin connects the positive pole of electrokinetic cell to be measured, and the second pin of described test cell connects the negative pole of described electrokinetic cell to be measured,
3rd pin ground connection of described test cell;Control unit, for controlling Guan Bi or the disconnection of described relay assembly, thus point
Do not obtain the first voltage, the second voltage and reference voltage;Logical block, for according to described first voltage, described second voltage,
Described first reference voltage and described first reference resistance obtain the insulation resistance of described electrokinetic cell to be measured;Display unit, uses
In the insulation resistance showing described electrokinetic cell to be measured.
The tester for measuring power battery insulation resistance proposed according to embodiments of the present invention, by first drawing it
Foot connects the positive pole of electrokinetic cell to be measured, and the second pin connects the negative pole of described electrokinetic cell to be measured, the 3rd pin ground connection, so that it may
Automatically test the insulation resistance of described electrokinetic cell to be measured with the Insulation monitoring standard according to GB/T18384.1-2015, ensureing
On the premise of test result high accuracy, greatly simplifie test operation flow process, improve work efficiency, it is achieved thereby that dynamic
The test automation of power battery insulation resistance.
According to one embodiment of present invention, described relay assembly comprises the first relay, the second relay, the 3rd continues
Electrical equipment, the 4th relay, the 5th relay, the 6th relay and the 7th relay, wherein, described first pin and described first
One end of relay connects, and described second pin is connected with one end of described second relay, another of described first relay
End is connected with one end, one end of the 6th relay of described 3rd relay, the other end of described second relay and described the
The other end of three relays, one end of described 4th relay connect, one end of described first reference resistance connects, and described first
The other end of reference resistance is connected with one end of described 5th relay, the other end of described 5th relay, the described 4th continues
The other end of electrical equipment is connected with one end of described voltmeter, another of the other end of described voltmeter and described 6th relay
End, one end of described 7th relay connect, and the other end of described 7th relay is connected with described 3rd pin;Open in test
Time dynamic, described control unit described first relay of control, described 3rd relay, described 4th relay and the described 7th continue
Electrical equipment closes, and controls the disconnection of other relays, obtains described first voltage by described voltmeter;Described control unit controls
Described second relay, described 4th relay and described 7th relay Guan Bi, and control the disconnection of other relays, by institute
State voltmeter and obtain described second voltage;Described control unit control described first relay, described 3rd relay, described the
Five relays and described 7th relay Guan Bi, other relays disconnect, and obtain described reference voltage by described voltmeter.
According to one embodiment of present invention, described test cell also comprises the 8th relay and the second reference resistance, institute
State the 8th relay and described second reference resistance is connected in series and props up with described 5th relay and described first reference resistance afterwards
Road is in parallel;Described control unit controls described first relay, described second relay, described 4th relay and the described 6th
Relay closes, and other relays disconnect, and is obtained the total voltage of described electrokinetic cell to be measured by described voltmeter, and according to institute
Stating total voltage selects one to determine described insulation resistance from described first reference resistance and described second reference resistance.
According to one embodiment of present invention, described first voltage and described second voltage are compared by described logical block
Relatively, wherein U will be defined as by higher value1, wherein will be defined as U by smaller value1', described logical block determines described according to below equation
Insulation resistance:
Wherein, R0Represent described first reference resistance or the second reference resistance, RiRepresent described insulation resistance, U2Represent institute
State reference voltage.
According to one embodiment of present invention, described logical block comprises memory module and computing module, wherein, described in deposit
Storage module is used for storing described first voltage, described second voltage, described reference voltage and described first reference resistance or described
Second reference resistance;Described computing module is for according to described first voltage, described second voltage, described reference voltage and described
First reference resistance or described second reference resistance calculate described insulation resistance.
According to one embodiment of present invention, described display unit is additionally operable to show described first voltage, described second electricity
Pressure, described total voltage, described reference voltage and described first reference resistance or described second reference resistance.
According to one embodiment of present invention, the described tester for measuring power battery insulation resistance also comprises first
Overcurrent protective device and the second overcurrent protective device, wherein, one end of described first overcurrent protective device and described first relay
The other end of device connects, and one end of the other end of described first overcurrent protective device and described 6th relay, the described 3rd continues
One end of electrical equipment connects;One end of described second overcurrent protective device is connected with the other end of described second relay, and described
The other end of two overcurrent protective devices and the other end of described 3rd relay, one end of described 4th relay, the described 5th
One end of relay connects.
Accompanying drawing explanation
Fig. 1 is according to an embodiment of the invention for measuring the square frame signal of the tester of power battery insulation resistance
Figure;
Fig. 2 is according to an embodiment of the invention for measuring the principle signal of the tester of power battery insulation resistance
Figure.
Reference:
Test cell 101;Control unit 102;Logical block 103;Display unit 104;
First relay 1;Second relay 2;3rd relay 3;4th relay 4;
5th relay 5;6th relay 6;7th relay 7;8th relay 8;
First reference resistance 9;Second reference resistance 10;First overcurrent protective device 11;
Second overcurrent protective device 12;First pin 13;Second pin 14;3rd pin 15;
Voltmeter 16;Tester 100.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most from start to finish
Same or similar label represents same or similar element or has the element of same or like function.Below with reference to attached
The embodiment that figure describes is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings the survey for measuring power battery insulation resistance that the embodiment of the present invention proposes is described in detail
Examination instrument.
Fig. 1 is the block diagram of the tester for measuring power battery insulation resistance according to embodiments of the present invention.
As it is shown in figure 1, described tester includes test cell, control unit, logical block and display unit.
Wherein, described test cell comprises relay assembly, voltmeter and the first reference resistance;Described control unit controls
The Guan Bi of described relay assembly or disconnection, thus obtain the first voltage, the second voltage and reference voltage respectively;Described logic list
Unit is for obtaining institute according to described first voltage, described second voltage, described first reference voltage and described first reference resistance
State the insulation resistance of electrokinetic cell to be measured;Described display unit, for showing the insulation resistance of described electrokinetic cell to be measured.
When the insulation resistance of electrokinetic cell to be measured tested by described tester, the first pin of described test cell connects to be treated
Surveying the positive pole of electrokinetic cell, the second pin of described test cell connects the negative pole of described electrokinetic cell to be measured, described test list
3rd pin ground connection of unit.Described control unit controls Guan Bi or the disconnection of described relay assembly, and described logical block is respectively
Storage records the numerical value that described voltmeter shows and then the insulation resistance calculating described electrokinetic cell to be measured.Finally, described insulation
The numerical value of resistance is shown by described display unit.
The tester for measuring power battery insulation resistance that the embodiment of the present invention proposes, by by its first pin even
The positive pole of electrokinetic cell is surveyed in reception, and the second pin connects the negative pole of described electrokinetic cell to be measured, the 3rd pin ground connection, it is possible to press
Insulation monitoring standard according to GB/T18384.1-2015 tests the insulation resistance of described electrokinetic cell to be measured automatically, is ensureing test
On the premise of result high accuracy, greatly simplifie test operation flow process, improve work efficiency, it is achieved thereby that power current
The test automation of pool insulation resistance.
Fig. 2 is the principle schematic of the tester for measuring power battery insulation resistance according to embodiments of the present invention.
As in figure 2 it is shown, described tester 100 includes: test cell 101, control unit 102, logical block 103 and display
Unit 104.Wherein, described test cell 101 comprises first relay the 1, second relay the 2, the 3rd relay the 3, the 4th relay
Device the 4, the 5th relay the 5, the 6th relay the 6, the 7th relay the 7, the 8th relay the 8, first reference resistance 9, second is with reference to electricity
Resistance 10, voltmeter the 16, first overcurrent protective device 11 and the second overcurrent protective device 12.
Wherein, described first pin 13 is connected with one end of described first relay 1, described second pin 14 and described the
One end of two relays 2 connects, and the other end of described first relay 1 connects with one end of described first overcurrent protective device 11
Connecing, the other end of described second relay 2 is connected with one end of described second overcurrent protective device 12, described first overcurrent protection
The other end of device 11 is connected with one end, one end of the 6th relay 6 of described 3rd relay 3, described second overcurrent protection
The other end of device 12 is connected with the other end of described 3rd relay 3, one end of described 4th relay 4, described first ginseng
Examine one end of resistance 9, one end of described second reference resistance 10 connects, the other end of described first reference resistance 9 and described the
One end of five relays 5 connects, and the other end of described second reference resistance 10 is connected with one end of described 8th relay 8, institute
State the other end and the described electricity of the other end of the 5th relay 5, the other end of described 8th relay 8, described 4th relay 4
One end of pressure table 16 connects, the other end of described voltmeter 16 and the other end of described 6th relay 6, described 7th relay
One end of 7 connects, and the other end of described 7th relay 7 is connected with described 3rd pin 15.
Before testing the insulation resistance of described electrokinetic cell to be measured, all relays are all off.
When the test starting of insulation resistance, described control unit controls described first relay 1, described 3rd relay
3, described 4th relay 4 and described 7th relay 7 close, and control the disconnection of other relays, the most described voltage simultaneously
Table 16 shows the first voltage, and this first voltage is stored by described logical block.
Then, described control unit controls described first relay 1, described 3rd relay 3 disconnects, and keeps the described 4th
Relay 4 and described 7th relay 7 close, then control described second relay 2 and close, and the most described voltmeter 16 shows
Two voltages, this second voltage is stored by described logical block.
Then, described control unit controls described 7th relay 7 and disconnects, and keeps described second relay 2 and described the
Four relays 4 close, then control described first relay 1 and described 6th relay 6 closes, and the most described voltmeter 16 shows
The total voltage of described electrokinetic cell to be measured, this total voltage is stored by described logical block.
Given this tester is to design according to the Insulation monitoring standard of GB/T18384.1-2015, and this standard regulation
Operating voltage range is 100 Ω/V-500 Ω/V, and therefore, described control unit calculates described first respectively according to described total voltage
Reference resistance and the running voltage of described second reference resistance, and then according to above-mentioned standard from described first reference resistance and described
Second reference resistance selects to meet the resistance of regulation, and then is calculated the exhausted of described electrokinetic cell to be measured by described logical block
Edge resistance.
As an example it is assumed that the resistance of the first reference resistance is 20k Ω, the resistance of described second reference resistance is 100k
Ω, above-mentioned total voltage is 500V, it can thus be appreciated that the running voltage of described second reference resistance (200 Ω/V) meets above-mentioned standard
Regulation, i.e. described control unit selects the resistance of described second reference resistance 10 as calculating the exhausted of described electrokinetic cell to be measured
The reference resistance of edge resistance.Now, described control unit controls described second relay 2, described 4th relay 4 and described the
Six relays 6 disconnect, and keep described first relay 1 to close, control described 3rd relay 3, described 7th relay 7 simultaneously
Closing with described 8th relay 8, the most described voltmeter 16 shows reference voltage, and this reference voltage is deposited by described logical block
Storage.
Described first voltage and described second voltage are compared by described logical block, will wherein be defined as by higher value
U1, wherein will be defined as U by smaller value1', described logical block determines described insulation resistance according to below equation:
Wherein, R0Represent described second reference resistance, RiRepresent described insulation resistance, U2Represent described reference voltage.
Described display unit is except showing the insulation resistance of the electrokinetic cell described to be measured finally recorded, it is also possible to
Time display record the intermediate value needed for described insulation resistance, the most described first voltage, described second voltage, described total voltage,
Described reference voltage, described first reference resistance or described second reference resistance.Described display unit can with Display on the same screen repeatedly
Record the multi-group data of insulation resistance, consequently facilitating be analyzed by multi-group data.
Further, according to one embodiment of present invention, described logical block can comprise memory module and calculate mould
Block.Wherein, described memory module is used for storing described first voltage, described second voltage, described reference voltage and described first
Reference resistance or described second reference resistance;Described computing module is for according to described first voltage, described second voltage, described
Reference voltage and described first reference resistance or described second reference resistance calculate described insulation resistance.
The tester for measuring power battery insulation resistance that the embodiment of the present invention proposes, is ensureing test result Gao Zhun
On the premise of exactness, greatly simplifie test operation flow process, improve work efficiency, it is achieved thereby that power battery insulation is electric
The test automation of resistance.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include at least one this feature.In describing the invention, " multiple " are meant that at least two, such as two, three
Individual etc., unless otherwise expressly limited specifically.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
Example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or spy
Point is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be in office
One or more embodiments or example combine in an appropriate manner.Additionally, in the case of the most conflicting, the skill of this area
The feature of the different embodiments described in this specification or example and different embodiment or example can be tied by art personnel
Close and combination.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is example
Property, it is impossible to being interpreted as limitation of the present invention, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, revises, replaces and modification.
Claims (7)
1. the tester being used for measuring power battery insulation resistance, it is characterised in that comprise:
Test cell, comprises relay assembly, voltmeter and the first reference resistance, wherein, the first pin of described test cell
Connecting the positive pole of electrokinetic cell to be measured, the second pin of described test cell connects the negative pole of described electrokinetic cell to be measured, described
3rd pin ground connection of test cell;
Control unit, for controlling Guan Bi or the disconnection of described relay assembly, thus obtains the first voltage, the second voltage respectively
And reference voltage;
Logical block, for according to described first voltage, described second voltage, described first reference voltage and described first reference
Resistance obtains the insulation resistance of described electrokinetic cell to be measured;With
Display unit, for showing the insulation resistance of described electrokinetic cell to be measured.
Tester for measuring power battery insulation resistance the most according to claim 1, it is characterised in that described relay
Device assembly comprise the first relay, the second relay, the 3rd relay, the 4th relay, the 5th relay, the 6th relay and
7th relay, wherein, described first pin is connected with one end of described first relay, described second pin and described second
One end of relay connects, the other end of described first relay and one end of described 3rd relay, the one of the 6th relay
End connects, and the other end of described second relay connects with one end of the other end of described 3rd relay, described 4th relay
Connect, one end of described first reference resistance connects, the other end of described first reference resistance and one end of described 5th relay
Connecting, the other end of described 5th relay, the described other end of the 4th relay are connected with one end of described voltmeter, described
The other end of voltmeter is connected with the other end, one end of described 7th relay of described 6th relay, described 7th relay
The other end of device is connected with described 3rd pin,
When test starting, described control unit controls described first relay, described 3rd relay, described 4th relay
Close with described 7th relay, and control the disconnection of other relays, obtain described first voltage by described voltmeter;
Described control unit controls described second relay, described 4th relay and described 7th relay Guan Bi, and controls
Other relays disconnect, and obtain described second voltage by described voltmeter;
Described control unit described first relay of control, described 3rd relay, described 5th relay and the described 7th continue
Electrical equipment closes, and other relays disconnect, and obtains described reference voltage by described voltmeter.
Tester for measuring power battery insulation resistance the most according to claim 2, it is characterised in that described test
Unit also comprises the 8th relay and the second reference resistance;
Described 8th relay and described second reference resistance are connected in series rear and described 5th relay and described first reference
Resistance branch is in parallel;
Described control unit described first relay of control, described second relay, described 4th relay and the described 6th continue
Electrical equipment closes, and other relays disconnect, and is obtained the total voltage of described electrokinetic cell to be measured by described voltmeter, and according to described
Total voltage select from described first reference resistance and described second reference resistance one as with reference to resistance determine described absolutely
Edge resistance.
Tester for measuring power battery insulation resistance the most according to claim 3, it is characterised in that
Described first voltage and described second voltage are compared by described logical block, wherein will be defined as U by higher value1, by it
Middle smaller value is defined as U '1;
Described logical block determines described insulation resistance according to below equation:
Wherein, R0Represent described first reference resistance or the second reference resistance, RiRepresent described insulation resistance, U2Represent described ginseng
Examine voltage.
Tester for measuring power battery insulation resistance the most according to claim 3, it is characterised in that described logic
Unit comprises memory module and computing module, wherein,
Described memory module is used for storing described first voltage, described second voltage, described reference voltage and described first reference
Resistance or described second reference resistance;
Described computing module is for according to described first voltage, described second voltage, described reference voltage and described first reference
Resistance or described second reference resistance calculate described insulation resistance.
Tester for measuring power battery insulation resistance the most according to claim 3, it is characterised in that described display
Unit is additionally operable to show described first voltage, described second voltage, described total voltage, described reference voltage and described first reference
Resistance or described second reference resistance.
7. according to the arbitrary described tester for measuring power battery insulation resistance of claim 1-6, it is characterised in that also
Comprise the first overcurrent protective device and the second overcurrent protective device, wherein,
One end of described first overcurrent protective device is connected with the other end of described first relay, described first overcurrent protection dress
The other end put is connected with one end, one end of described 3rd relay of described 6th relay;
One end of described second overcurrent protective device is connected with the other end of described second relay, described second overcurrent protection dress
The other end put and the other end of described 3rd relay, one end of described 4th relay, one end of described 5th relay
Connect.
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CN201610227816.7A CN105911352B (en) | 2016-04-13 | 2016-04-13 | Tester for measuring insulation resistance of power battery |
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CN108226721A (en) * | 2017-12-19 | 2018-06-29 | 上海汽车集团股份有限公司 | Electric automobile high-voltage safety test multi-measuring point automatic test approach |
CN111965428A (en) * | 2020-08-05 | 2020-11-20 | 东软睿驰汽车技术(沈阳)有限公司 | Insulation resistance detection method, device, equipment and storage medium |
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CN111965428A (en) * | 2020-08-05 | 2020-11-20 | 东软睿驰汽车技术(沈阳)有限公司 | Insulation resistance detection method, device, equipment and storage medium |
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