CN113238156B - Testing device for detecting residual electric quantity in waste lithium battery pack - Google Patents
Testing device for detecting residual electric quantity in waste lithium battery pack Download PDFInfo
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- CN113238156B CN113238156B CN202110781711.7A CN202110781711A CN113238156B CN 113238156 B CN113238156 B CN 113238156B CN 202110781711 A CN202110781711 A CN 202110781711A CN 113238156 B CN113238156 B CN 113238156B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
Abstract
The invention discloses a testing device for detecting residual electric quantity in a waste lithium battery pack, which comprises: test box, detection mechanism and supporting mechanism. The testing box is provided with a testing cover, a step opening is formed in the inner wall of the testing box, a limiting part is arranged on the lower end face of the testing cover, the limiting part is arranged in the step opening, the detecting mechanism is installed on the lower end face of the testing cover, the supporting mechanism is installed in the testing box, and the supporting mechanism is arranged at the lower end of the detecting mechanism. The detection mechanism comprises a fixed seat, a rotating rod and a push rod. The supporting mechanism comprises a supporting box, a cylinder and a supporting piece. This testing arrangement compact structure, design benefit can place the old and useless lithium cell group that needs the test on supporting box or the rubber belt on the support piece to support it through supporting mechanism, then exert pressure to old and useless lithium cell group through detection mechanism, the rethread computer reachs data, thereby surveys out the surplus electric quantity data in this old and useless lithium cell group.
Description
Technical Field
The invention relates to the technical field of testing, in particular to a testing device for detecting residual electric quantity in a waste lithium battery pack.
Background
Due to the advantages of energy conservation, environmental protection and the like, electric automobiles are gradually popularized, and the endurance mileage and the safety of the electric automobiles are more and more concerned. In order to accurately estimate the remaining driving mileage of the electric vehicle and ensure the safety of the electric vehicle, an accurate and practical lithium battery remaining capacity estimation method is particularly important. The method for estimating the residual electric quantity (SOC) of the lithium battery is to solve the current electric quantity of the lithium battery by an ampere-hour integration method, but the method is not accurate due to the influence of noise of a current sensor.
According to the research on the state of charge estimation of the lithium battery based on the UKF method, a second-order RC equivalent circuit model is adopted, the battery parameters of the lithium battery under different residual electric quantities are identified by adopting a pulse testing method, and then the on-line estimation of the residual electric quantity of the lithium battery during constant-current discharge is realized by utilizing an unscented Kalman filtering algorithm, however, the parameters identified by the pulse testing are inaccurate and are influenced by factors such as pulse width, sampling time interval and the like. In addition, when the lithium battery is charged and discharged at a constant current, the second-order RC equivalent circuit model is degraded into a Rint model, the state equation is changed, and the estimation accuracy of the residual electric quantity of the lithium battery is also reduced. In the current mode of measuring the electric quantity, manual detection is needed, electric leakage can be caused due to careless operation, and workers are injured, so that a testing device capable of detecting the residual electric quantity in the waste lithium battery pack is needed to ensure the estimation precision of the residual electric quantity of the lithium battery.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a testing device for detecting the residual electric quantity in a waste lithium battery pack.
The technical scheme of the invention is realized as follows:
the utility model provides a testing arrangement who detects remaining capacity in old and useless lithium cell group, includes:
the test box is used for placing the waste lithium battery pack inside for testing;
the detection mechanism is used for detecting the electric quantity in the waste lithium battery pack;
the supporting mechanism is used for supporting the waste lithium battery pack and is beneficial to the pressure application of the detection mechanism;
the testing box is provided with a testing cover, the inner wall of the testing box is provided with a step opening, the lower end face of the testing cover is provided with a limiting part, the limiting part is arranged in the step opening, the detecting mechanism is arranged on the lower end face of the testing cover, the supporting mechanism is arranged in the testing box, and the supporting mechanism is arranged at the lower end of the detecting mechanism;
detection mechanism includes fixing base, dwang and catch bar, the inside of fixing base has first motor, first motor is connected with the dwang, the dwang is connected with the one end of catch bar is articulated, articulated backup pad on the other end of catch bar, the dustcoat has in the backup pad, second motor and stand pipe have in the backup pad, the lead screw has on the second motor, first installation piece has on the lead screw, third motor and guide part have on the first installation piece, a guide way has on the dustcoat, the guide part is arranged in the guide way, the rotation axis has on the third motor, the rotary rod has on the rotation axis, the inside of stand pipe has the guide post, the both sides of guide post have spacing portion, fixed pipe has in the spacing portion, first restriction groove has on the stand pipe, The limiting parts on two sides of the guide post are respectively arranged in the first limiting groove and the second limiting groove, the rotating rod penetrates through the third limiting groove and extends to the inside of the guide tube, the limiting post is arranged at the lower end of the guide post and is installed on a supporting plate, an elastic rope is arranged on the supporting plate, two ends of the elastic rope are fixed on the supporting plate and are arranged on two sides of the guide tube, the middle part of the elastic rope is located in the fixed tube, a connecting part is arranged at the lower end of the guide post and is arranged in the second limiting groove, a conductive post is arranged on the connecting part and penetrates through the supporting plate and extends to the lower end of the guide post;
the supporting mechanism comprises a supporting box, an air cylinder and a supporting piece, wherein second mounting blocks are arranged at four corners of the supporting box, the air cylinder is fixed on the second mounting blocks, a guide rail is arranged in the supporting box, the supporting piece is mounted on the guide rail through a dovetail block, a fixing block is arranged at the rear end of the supporting piece, an air cylinder rod is arranged on the air cylinder and extends to the fixing block, a rubber belt is arranged on the supporting piece, and two ends of the rubber belt are fixed on the inner wall of the supporting box.
In the invention, the rotating rod is provided with a ball head.
In the invention, the upper end of the guide post is provided with an inclined surface.
In the invention, a spring is sleeved outside the limiting column, one end of the spring is contacted with the supporting plate, and the other end of the spring is contacted with the lower end face of the guide column.
In the present invention, the length of the second restriction groove is greater than the length of the first restriction groove.
In the invention, the supporting box is provided with a rubber strip.
In the invention, the rubber belt is provided with a plurality of inward sunken counter bores.
In the invention, the test box and the support box are provided with a plurality of high-definition cameras.
The testing device for detecting the residual electric quantity in the waste lithium battery pack has the following beneficial effects that: this testing arrangement compact structure, design benefit can place the old and useless lithium cell group that needs the test on supporting box or the rubber belt on the support piece to support it through supporting mechanism, then exert pressure to old and useless lithium cell group through detection mechanism, the rethread computer reachs data, thereby surveys out the surplus electric quantity data in this old and useless lithium cell group. And the device can survey old and useless lithium cell group automatically, has avoided staff's direct contact, has guaranteed staff's self safety, has still accelerated the efficiency of survey electric quantity simultaneously.
Drawings
Fig. 1 is a schematic structural diagram of a testing apparatus for detecting remaining power in a waste lithium battery pack according to the present invention;
FIG. 2 is a schematic view of the internal structure of FIG. 1;
FIG. 3 is a schematic structural view of the support mechanism of FIG. 2;
FIG. 4 is a schematic view of the cylinder, rubber band, support and rail configuration of FIG. 3;
fig. 5 is a schematic structural diagram of a detection mechanism of the testing device for detecting the remaining power in the waste lithium battery pack according to the present invention;
FIG. 6 is another schematic view of the structure of FIG. 5;
FIG. 7 is a schematic view of the housing and support plate arrangement of FIG. 6;
FIG. 8 is a top view of FIG. 7;
FIG. 9 is a cross-sectional view taken along line A-A of FIG. 8;
FIG. 10 is a schematic view of the internal structure of the housing of FIG. 7;
FIG. 11 is a partial enlarged view of FIG. 10 at B;
FIG. 12 is another schematic view of the structure of FIG. 10;
fig. 13 is a schematic structural view of the support plate, the third motor and the guide post in fig. 12.
In the figure: the test box comprises a test box 1, a test cover 2, a step opening 3, a detection mechanism 4, a support mechanism 5, a fixed seat 6, a rotating rod 7, a push rod 8, a support plate 9, an outer cover 10, a second motor 11, a guide pipe 12, a screw rod 13, a first mounting block 14, a third motor 15, a guide part 16, a guide groove 17, a rotating shaft 18, a rotating rod 19, a bulb part 20, an elastic rope 21, a guide column 22, a limiting part 23, a fixing pipe 24, an inclined plane 25, a first limiting groove 26, a second limiting groove 27, a third limiting groove 28, a limiting column 29, a spring 30, a connecting part 31, a conductive column 32, a support box 33, an air cylinder 34, a support part 35, a second mounting block 36, a guide rail 37, a fixing block 38, an air cylinder rod 39, a rubber belt 40, a twisting part 401, a counter bore 41, a rubber strip 42 and a notch 43.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in fig. 1 to 13, the testing apparatus for detecting the remaining capacity of the waste lithium battery pack according to the present invention includes:
and the test box 1 is used for placing the waste lithium battery pack inside for testing. The testing box 1 is provided with a testing cover 2, the inner wall of the testing box 1 is provided with a step opening 3, the lower end face of the testing cover 2 is provided with a limiting part (not shown in the figure), the limiting part is arranged in the step opening 3, a detecting mechanism 4 is arranged on the lower end face of the testing cover 2, a supporting mechanism 5 is arranged in the testing box 1, and the supporting mechanism 5 is arranged at the lower end of the detecting mechanism 4. The test box 1 can also prevent that old and useless lithium cell group from breaking down when the test, leads to other reasons such as on fire, and test box 1 adopts transparent material to make simultaneously, can observe the inside condition. Meanwhile, when the device is used, the detection mechanism 4 can be controlled by a remote controller, the detection mechanism 4 can reach any position, and any electric connecting column of the waste lithium battery pack is subjected to contact measurement.
And the detection mechanism 4 is used for detecting the electric quantity in the waste lithium battery pack. The detection mechanism 4 comprises a fixed seat 6, a rotating rod 7 and a push rod 8. The inside of fixing base 6 has first motor (not shown in the figure), and first motor is connected with dwang 7, and dwang 7 is articulated with one end of catch bar 8 and is connected, articulates a backup pad 9 on the other end of catch bar 8. The rotating rod 7 and the pushing rod 8 are provided with three positions, but can be arranged according to specific conditions in practical use. When first motor rotates, can drive dwang 7 and rotate for the other end of dwang 7 can rotate round first motor, thereby makes 8 lower extreme positions of catch bar move, and the first motor that the dwang 7 of three places used is independent setting, makes the dwang 7 pivoted angle of three places different, and makes the backup pad 9 of lower extreme move to arbitrary position on, moves to arbitrary one positive pole top in test box 1.
The supporting plate 9 is provided with an outer cover 10, the supporting plate 9 is provided with a second motor 11 and a guide pipe 12, the second motor 11 is provided with a screw rod 13, the screw rod 13 is provided with a first mounting block 14, the first mounting block 14 is provided with a third motor 15 and a guide part 16, the outer cover 10 is provided with a guide groove 17, and the guide part 16 is arranged in the guide groove 17. When the second motor 11 drives the first mounting block 14 to move up and down, the guide part 16 on the first mounting block 14 is positioned in the guide groove 17, so that the first mounting block 14 cannot be driven to rotate by the screw rod 13.
The third motor 15 has a rotating shaft 18, the rotating shaft 18 has a rotating rod 19, and the rotating rod 19 has a ball 20, the ball 20 is used for catching the elastic cord 21 and stretching the elastic cord 21. The guide tube has a guide post 22 inside, and the guide post 22 has a stopper 23 on both sides, and a fixing tube 24 is provided on the stopper 23. The upper end of guide post 22 has an inclined plane 25, and this inclined plane 25 is when being used for rotary rod 19 to rotate, makes bulb 20 pass through in the upper end of inclined plane 25 to make bulb 20 enter into the upper end of guide post 22, is in the centre of two spacing portions 23, does benefit to bulb 20 and is driven the stretch cord 21 pulling of upper end by rotary rod 19, then makes second motor 11 rotate again, promotes first installation piece 14, makes third motor 15 also promote thereupon, pulls stretch cord 21. After the rotating rod 19 is located at the lower end of the elastic cord 21, the third motor 15 stops rotating, and then the first mounting block 14 drives the third motor 15 to lift upwards, so as to pull the elastic cord 21.
When the conductive post 32 is used for measuring the electric quantity, the ball head portion 20 is driven by the third motor 15 in the opposite direction, so that the ball head portion 20 is disposed at the upper end of the elastic cord 21, and when the guide post 22 is pushed upwards by the force of the conductive post 32 at the lower end, the rotating rod 19 of the ball head portion 20 can block the elastic cord 21, so that the guide post 22 receives the buffering force to protect the conductive post 32.
The guide tube 12 is provided with a first limiting groove 26, a second limiting groove 27 and a third limiting groove 28, the limiting parts 23 at two sides of the guide column 22 are respectively arranged in the first limiting groove 26 and the second limiting groove 27, and the rotating rod 19 passes through the third limiting groove 28 and extends to the inside of the guide tube 12. The length of the second restriction groove 27 is greater than the length of the first restriction groove 26.
The lower extreme of guide post 22 has spacing post 29, and spacing post 29 is installed on backup pad 9, and the outside cover of spacing post 29 has spring 30, and one end and the backup pad 9 contact of spring 30, the lower terminal surface contact of the other end with guide post 22. The support plate 9 is provided with an elastic rope 21, two ends of the elastic rope 21 are fixed on the support plate 9 and on two sides of the guide tube 12, the middle part of the elastic rope is located in the fixing tube 24, the lower end of the guide column 22 is provided with a connecting part 31, the connecting part 31 is arranged in the second limiting groove 27, the connecting part 31 is provided with a conductive column 32, and the conductive column 32 penetrates through the support plate 9 and extends to the lower end.
And the supporting mechanism 5 is used for supporting the waste lithium battery pack and is beneficial to the pressure application of the detection mechanism 4.
The support mechanism 5 includes a support box 33, a cylinder 34, and a support 35. The support box 33 has second mounting blocks 36 at four corners, and the cylinder 34 is fixed to the second mounting blocks 36. The support box 33 has a guide rail 37 inside, the support member 35 is mounted on the guide rail 37 by a dovetail block (not shown), the rear end of the support member 35 has a fixing block 38, the cylinder 34 has a cylinder rod 39, and the cylinder rod 39 extends to the fixing block 38. The supporting box 33 also has notches 43 at the four corners for holding the fixing blocks 38. Have rubber tape 40 on support piece 35, have many places inwards sunken counter bore 41 on the rubber tape 40, this counter bore 41 does benefit to and attracts old and useless lithium cell group bottom for old and useless lithium cell group is attached on rubber tape 40, is difficult for dropping when the test, and the both ends of rubber tape 40 are fixed on the inner wall of supporting box 33. The supporting box 33 is provided with the rubber strip 42, and the rubber strip 42 is used for increasing friction force with the waste lithium battery pack to prevent the waste lithium battery pack from falling.
The rubber belt 40 is disposed at the upper end of two adjacent supporting members 35, two ends of the rubber belt 40 are located on the inner wall of the supporting box 33, the middle part of the rubber belt is disposed at the upper end of the two supporting members 35, and a twisting groove (not shown in the figure) is formed in the middle of the supporting members 35, so that the rubber belt 40 can change direction in the middle of the supporting members 35, and the counter bore 41 which is originally located at the lower end is turned to the upper end. The shape of the twist groove corresponds to the shape of the twist 401 in fig. 4, such that the counterbore 41 at the lower end is turned to the upper end.
With multiple high-definition cameras (not shown) in the test chamber 1 and the support chamber 33. Can observe through high definition digtal camera and lead the anodal joint that electrical pillar 32 contacted old and useless lithium cell group, can also observe simultaneously whether anodal joint on the old and useless lithium cell group is good.
When the test box is used, the test cover 2 is firstly opened, the waste lithium battery pack is placed on the support box 33 or the support piece 35, when the area of the waste lithium battery pack to be tested is larger than the opening maximum area of the support piece 35, the waste lithium battery pack is placed on the support box 33, and the middle part of the waste lithium battery pack is still located on the rubber belt 40 on the support piece 35. When the area of the waste lithium battery pack needing to be tested is smaller than the area of the supporting box 33, the waste lithium battery pack can be placed on the supporting piece 35. According to the size of old and useless lithium cell group area, start cylinder 34, adjust support piece 35's position for on old and useless lithium cell group is in rubber tape 40 on support piece 35, the counter bore 41 on the rethread rubber tape 40 attracts old and useless lithium cell group, makes its steady arrange in on the rubber tape 40. Then remove detection mechanism 4 to the position that needs to detect through the remote controller again, make second motor 11 drive first installation piece 14 to the lower extreme again, third motor 15 at this moment starts, catch on stretch cord 21 through bulb 20 on the rotary rod 19, second motor 11 drives first installation piece 14 and reachs appointed height, make guide post 22 upwards shrink, make and lead upward shrink in the electrical pillar 32 together, when not needing the test, alright in order to protect and lead electrical pillar 32, make and lead electrical pillar 32 can not miss and touch the positive pole. When a test is needed, the third motor 15 is started reversely, so that the elastic rope 21 is separated from the rotating rod 19, the guide column 22 is contracted and falls by the elastic force, and the conductive column 32 also falls along with the elastic rope, penetrates through the support plate 9 and extends to the lower end of the support plate 9, and can contact the positive pole during operation.
Meanwhile, the elastic rope 21 on the guide post 22 and the spring 30 at the lower end can buffer the conductive post 32, and when the conductive post 32 contacts the anode downwards, if the force is large, the conductive post 32 is prevented from being damaged when in contact. The spring 30 is used to cushion the guide post 22 when the guide post 22 falls down, and also protects the conductive post 32.
When testing old and useless lithium cell group, earlier be connected to outside apparatus with old and useless lithium cell group's negative pole on, then during the survey through leading electrical pillar 32 upper end and being connected with the positive pole of apparatus, lead electrical pillar 32 promptly and be equivalent to the positive pole of apparatus, remove it, remove on the single battery positive pole on the old and useless lithium cell group of difference for whole circuit intercommunication alright in order to test out the electric quantity of single battery in each old and useless lithium cell group.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. The utility model provides a testing arrangement who detects remaining capacity in old and useless lithium cell group which characterized in that includes:
the test box is used for placing the waste lithium battery pack inside for testing;
the detection mechanism is used for detecting the electric quantity in the waste lithium battery pack;
the supporting mechanism is used for supporting the waste lithium battery pack and is beneficial to the pressure application of the detection mechanism;
the testing box is provided with a testing cover, the inner wall of the testing box is provided with a step opening, the lower end face of the testing cover is provided with a limiting part, the limiting part is arranged in the step opening, the detecting mechanism is arranged on the lower end face of the testing cover, the supporting mechanism is arranged in the testing box, and the supporting mechanism is arranged at the lower end of the detecting mechanism;
detection mechanism includes fixing base, dwang and catch bar, the inside of fixing base has first motor, first motor is connected with the dwang, the dwang is connected with the one end of catch bar is articulated, articulated backup pad on the other end of catch bar, the dustcoat has in the backup pad, second motor and stand pipe have in the backup pad, the lead screw has on the second motor, first installation piece has on the lead screw, third motor and guide part have on the first installation piece, a guide way has on the dustcoat, the guide part is arranged in the guide way, the rotation axis has on the third motor, the rotary rod has on the rotation axis, the inside of stand pipe has the guide post, the both sides of guide post have spacing portion, fixed pipe has in the spacing portion, first restriction groove has on the stand pipe, The limiting parts on two sides of the guide post are respectively arranged in the first limiting groove and the second limiting groove, the rotating rod penetrates through the third limiting groove and extends to the inside of the guide tube, the limiting post is arranged at the lower end of the guide post and is installed on a supporting plate, an elastic rope is arranged on the supporting plate, two ends of the elastic rope are fixed on the supporting plate and are arranged on two sides of the guide tube, the middle part of the elastic rope is located in the fixed tube, a connecting part is arranged at the lower end of the guide post and is arranged in the second limiting groove, a conductive post is arranged on the connecting part and penetrates through the supporting plate and extends to the lower end of the guide post;
the supporting mechanism comprises a supporting box, an air cylinder and a supporting piece, wherein second mounting blocks are arranged at four corners of the supporting box, the air cylinder is fixed on the second mounting blocks, a guide rail is arranged in the supporting box, the supporting piece is mounted on the guide rail through a dovetail block, a fixing block is arranged at the rear end of the supporting piece, an air cylinder rod is arranged on the air cylinder and extends to the fixing block, a rubber belt is arranged on the supporting piece, and two ends of the rubber belt are fixed on the inner wall of the supporting box.
2. The testing device for detecting the residual capacity of the waste lithium battery pack as claimed in claim 1, wherein the rotating rod is provided with a ball head.
3. The testing device for detecting the residual capacity of the waste lithium battery pack as claimed in claim 1, wherein the upper end of the guide post is provided with an inclined surface.
4. The testing device for detecting the residual capacity in the waste lithium battery pack according to claim 1, wherein a spring is sleeved outside the limiting column, one end of the spring is in contact with the supporting plate, and the other end of the spring is in contact with the lower end face of the guide column.
5. The testing device for detecting the residual capacity in the waste lithium battery pack according to claim 1, wherein the length of the second limiting groove is greater than that of the first limiting groove.
6. The testing device for detecting the residual capacity of the waste lithium battery pack according to claim 1, wherein the supporting box is provided with a rubber strip.
7. The testing device for detecting the residual capacity of the waste lithium battery pack according to claim 1, wherein the rubber belt is provided with a plurality of inward sunken counter bores.
8. The testing device for detecting the residual capacity of the waste lithium battery pack according to claim 1, wherein a plurality of high-definition cameras are arranged in the testing box and the supporting box.
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| CN202110781711.7A CN113238156B (en) | 2021-07-12 | 2021-07-12 | Testing device for detecting residual electric quantity in waste lithium battery pack |
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| CN202110781711.7A CN113238156B (en) | 2021-07-12 | 2021-07-12 | Testing device for detecting residual electric quantity in waste lithium battery pack |
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| CN113238156B true CN113238156B (en) | 2021-11-23 |
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