CN114578245A - Device and method for rapidly detecting self-discharge rate of lithium iron phosphate lithium ion battery - Google Patents
Device and method for rapidly detecting self-discharge rate of lithium iron phosphate lithium ion battery Download PDFInfo
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- CN114578245A CN114578245A CN202210485239.7A CN202210485239A CN114578245A CN 114578245 A CN114578245 A CN 114578245A CN 202210485239 A CN202210485239 A CN 202210485239A CN 114578245 A CN114578245 A CN 114578245A
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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]
- G01R31/3644—Constructional arrangements
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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
- G01R31/387—Determining ampere-hour charge capacity or SoC
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses equipment and a method for rapidly detecting the self-discharge rate of a lithium iron phosphate lithium ion battery, and relates to the technical field of lithium iron phosphate discharge detection. The lithium iron phosphate lithium detection lathe comprises a lithium iron phosphate lithium power pack, an energy charging mechanism and a current detection meter which are sequentially arranged at the top of the detection lathe, wherein the energy charging mechanism is sequentially connected with the lithium iron phosphate lithium power pack and the current detection meter in series; the energy charging mechanism comprises an adjusting electric receptacle, and a rotary circular ring table is rotatably connected to the outside of the adjusting electric receptacle. According to the invention, the lithium iron phosphate battery to be detected and the capacitor with the energy storage effect are connected in series, so that the electric energy emitted by the lithium iron phosphate battery is absorbed by the capacitor, the capacitor and the lithium iron phosphate battery are cut off, and a current amplifier and a current detection meter are externally connected to measure the current magnitude emitted by the lithium iron phosphate battery in a specified actual state, and the lithium iron phosphate battery is screened by comparing the current magnitude of the lithium iron phosphate battery, so that the time required by actual screening is shortened through simple mechanical linkage, and the detection efficiency is indirectly improved.
Description
Technical Field
The invention relates to the technical field of lithium iron phosphate discharge detection, in particular to equipment and a method for rapidly detecting the self-discharge rate of a lithium iron phosphate lithium ion battery.
Background
Because the lithium iron phosphate is a positive electrode material of a lithium ion battery for a power battery pack, due to the characteristics of the lithium iron phosphate, a discharge platform of the lithium ion battery which is made of the lithium iron phosphate as the positive electrode material is very gentle, the standing voltage of the charged lithium iron phosphate lithium ion battery is almost always 3.33V, the value of the standing voltage is basically irrelevant to the charging degree, and the voltage value is closely related to the crystal structure of the lithium iron phosphate lithium ion battery, and in the charging and discharging process of the lithium iron phosphate lithium battery, because the interior of the lithium iron phosphate lithium battery is always kept in an olivine structure which is only slightly changed along with the charging and discharging process of the material, when the lithium iron phosphate lithium battery is in the standing state, the battery voltage is always at about 3.334V (equilibrium potential), the charging state of the battery can not be judged by the voltage like other lithium ion batteries, and when the lithium iron phosphate lithium ion battery is applied to the power battery and an energy storage battery, often need join in marriage the group through many electric cores series-parallel connection, when the inconsistent electric core of self-discharge degree is in groups, the electric core that the self-discharge rate is big discharges easily at the discharge in-process, and can lead to other electric cores to overcharge at the charging process, the electric core that the self-discharge rate is big simultaneously can lead to the decay of whole group battery capacity, seriously influence the electrochemical performance and the life of group battery, current screening mode on the market is through shelving the back discharge and judging the self-discharge rate for a long time, this kind of mode generally all needs the time of 3 ~ 4 weeks to detect the screening, the actual screening rate has been reduced.
The Chinese invention with the publication number of CN103048623B discloses a method for rapidly detecting the self-discharge rate of a lithium iron phosphate lithium ion battery, which judges by measuring the voltage value of the battery at a certain time after the battery is fully charged or discharged according to the trend that the voltage of the lithium iron phosphate battery can recover to the balance potential, the measurement is rapid and accurate, the production efficiency and the product quality are greatly improved, the setting of screening the consistency of lithium ion single batteries is facilitated, the effect of improving the actual screening rate is realized, but the problem of overlong actual screening still exists, and a novel scheme is provided for solving the existing problems.
Disclosure of Invention
The present invention is directed to a device and a method for rapidly detecting the self-discharge rate of a lithium iron phosphate lithium ion battery, so as to solve the problems mentioned in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a device for rapidly detecting the self-discharge rate of a lithium iron phosphate lithium ion battery comprises a lithium iron phosphate lithium power pack, an energy charging mechanism and a current detection meter which are sequentially arranged at the top of a detection lathe, wherein the energy charging mechanism is sequentially connected with the lithium iron phosphate lithium power pack and the current detection meter in series;
the energy charging mechanism comprises an energy adjusting capacitor seat, the outer part of the energy adjusting capacitor seat is rotatably connected with a rotary circular ring table, an energy charging capacitor bank is installed in the energy adjusting capacitor seat, and capacitors in the energy charging capacitor bank are connected in parallel;
the two sides of one end of the outer part of the rotating circular ring table are respectively and fixedly connected with a clamping frame, the inner part of each clamping frame is communicated with the inner part of the rotating circular ring table, the inner parts of the two clamping frames are respectively provided with a wiring harness box, and the input ends of the two wiring harness boxes are respectively communicated with the anode and the cathode of the lithium iron phosphate power supply pack;
two sides of the other end inside the rotating circular ring table are respectively fixed with a diversion harness, the head ends of the two diversion harnesses are respectively and fixedly connected with a switching piece, one end of the switching piece is respectively communicated with the output end of the harness box and the input end of the adjusting capacitor seat, and the other end of the switching piece is only communicated with the input end of the adjusting capacitor seat when the rotating circular ring table rotates;
the tail ends of the two diversion wire harnesses are fixedly connected with a communicating wire harness respectively, and one ends of the two communicating wire harnesses penetrate through the rotating circular ring platform and are communicated with the positive electrode and the negative electrode of the current detection meter respectively.
Furthermore, the switching piece comprises a receiving block, an insulating pipe and a contact block, the receiving block and the contact block are connected and fixed through the insulating pipe, the input end of the adjusting electric socket seat is a connecting seat, one end of the receiving block is fixed and communicated with the head end of the guide wire harness, one side of the receiving block is in contact with one end of the connecting seat when the rotating circular ring table rotates, one side of the contact block is fixed with the output end of the wire harness box, and the other side of the contact block is in contact with one end of the connecting seat.
Furthermore, two sides of one end of the inner wall of the rotating circular ring table are respectively provided with a sliding long hole, and the contact block is in contact with the receiving block through the sliding long hole and the input end of the adjusting electricity-saving seat.
Furthermore, a clamping mechanism is fixedly installed at the bottom end of the lithium iron phosphate lithium power supply unit of the detection lathe, the clamping mechanism comprises a driving motor, a base of the driving motor is fixed with one end of the bottom of the detection lathe, the other end of the bottom of the detection lathe is fixedly connected with a sealing cover, an output end of the driving motor is fixedly connected with a transmission shaft, and one end of the transmission shaft penetrates through the sealing cover and is hinged with one side of the interior of the transmission shaft;
threads with opposite lines are arranged outside the transmission shaft, the two sides of one end of the detection lathe are respectively provided with a hinged long hole, the two ends outside the transmission shaft are respectively connected with a hinged block in a rotating mode, the two ends of the hinged block are respectively in sliding connection with the two ends inside the sealing cover, the top of the hinged block penetrates through a fixedly connected communicating device with the hinged long hole, a diode is arranged inside the communicating device, the lithium iron phosphate lithium power pack is placed between the two communicating devices, and the positive pole and the negative pole of the lithium iron phosphate lithium power pack are respectively communicated with the input end of the communicating device.
Furthermore, the transmission shaft is hinged with a limiting block at the joint of the two opposite threads, and the top end of the limiting block is fixed with the bottom of the detection lathe.
Furthermore, a temperature adjusting mechanism is fixedly connected to the outside of the lithium iron phosphate power pack of the detection lathe;
the temperature adjusting mechanism comprises a placing cover, the bottom of the placing cover is fixed with the top of the detection lathe, the top of the placing cover is rotatably connected with a sealing turning plate, two sides of the top of the sealing turning plate are respectively inserted with a protective cover cylinder, and the open ends of the two protective cover cylinders are respectively contacted with the positive electrode and the negative electrode of the lithium iron phosphate lithium power supply pack.
Furthermore, two sides of the outside of the placing cover are respectively provided with a communicating long hole, two sides of the inside of the placing cover are respectively connected with a sealing strip in a sliding manner, two ends of the outside of the placing cover are respectively provided with a through hole, and the sealing strips are matched with the through holes;
the joint frame outside has been seted up and has been connected the slot hole, the input of linker runs through the sealing strip to pass the intercommunication slot hole in proper order and connect the slot hole with the input of pencil box is connected.
Furthermore, the temperature adjusting mechanism comprises a micro air conditioner, a base of the micro air conditioner is fixed to the bottom of the detection lathe, an output end of the micro air conditioner is fixedly connected with a gas injection pipe, an input end of the micro air conditioner is fixedly connected with an exhaust pipe, one end of the gas injection pipe is fixed to one side of the outer portion of the placing cover, and the placing cover, the gas injection pipe, the micro air conditioner and the exhaust pipe are sequentially communicated.
Furthermore, a switching driving mechanism is fixedly connected to the bottom end of the detection lathe at the energy charging mechanism;
the switching driving mechanism comprises a positioning ring table and a switching motor, the positioning ring table and the switching motor are both fixed at the bottom of the detection lathe, the bottom of the positioning ring table is rotatably connected with a driving disc, the top end of the driving disc is fixedly connected with an input wheel, the output end of the switching motor is fixedly connected with a driving wheel, and a driving belt is wound between the driving wheel and the input wheel;
the bottom of position ring platform is seted up and is run through the slot hole that runs through that detects the lathe top, through running through slot hole fixedly connected with spliced pole between driving-disc and the rotation ring platform, the position ring platform is installed respectively at the both ends of running through the slot hole inner wall and is triggered the arch, trigger arch and switching motor electric connection, the spliced pole contacts with triggering the arch when rotating.
Furthermore, a current amplifier is arranged between the current detection table and the energy charging mechanism in a series flow mode, the bottom end of the current amplifier is fixed to the top of the detection lathe, one end of the top of the detection lathe is fixedly connected with a control terminal, and one end of the bottom of the detection lathe is fixedly connected with a power distribution cabinet.
In order to achieve the above purpose, the invention also provides the following technical scheme: a method for rapidly detecting the self-discharge rate of a lithium iron phosphate lithium ion battery, wherein a device used in the detection method meets any one of the above requirements, and comprises the following steps:
s1: placing one of a plurality of lithium iron phosphate lithium power supplies into a sealing cover with adjustable temperature, and adjusting the temperature in the sealing cover to 20-24 ℃;
s2: respectively connecting a lithium iron phosphate lithium power supply in series with a capacitor with an energy storage function;
s3: a diode is connected in series between the lithium iron phosphate power supply and a capacitor in the circuit;
s4: after the lithium iron phosphate lithium ion battery is placed for 3 to 5 hours, the lithium iron phosphate lithium ion battery and the capacitor are disconnected;
s5: the capacitor is connected with the current detection meter in series;
s6: a current amplifier is connected in series between the circuit between the capacitor and the current detection meter;
s6: observing the current value in the current detection meter;
s7: dividing lithium iron phosphate power supplies with the same discharge capacity into a group, and connecting the lithium iron phosphate power supplies in series and parallel;
s8: detecting the lithium iron phosphate power pack after series-parallel connection by using an open-circuit voltage attenuation rate measurement method;
s9: recording the voltage of the lithium iron phosphate power pack in any time period, and obtaining the charge state of the lithium iron phosphate power pack in the time period by comparing the voltage with the charge amount of the battery;
s10: and comparing the detected data with the attenuation slope of the voltage and the attenuation capacity corresponding to the unit time to calculate to obtain the self-discharge rate of the lithium iron phosphate lithium battery pack.
Compared with the prior art, the invention has the beneficial effects that:
this equipment and method of short-term test lithium iron phosphate lithium ion battery from discharge rate, establish ties mutually through the lithium iron phosphate battery that will detect with the electric capacity that has the energy storage efficiency, make the electric energy that the lithium iron phosphate battery discharged absorbed by electric capacity, cutting off electric capacity and lithium iron phosphate battery through with, and external current amplifier and current detection table measure the electric current volume that the lithium iron phosphate battery discharged in the regulation is actual, filter the lithium iron phosphate battery through comparing the lithium iron phosphate battery electric current volume, with the actual required time of screening that simple mechanical linkage shortened, indirect improvement detection efficiency.
This equipment and method of short-term test lithium iron phosphate lithium ion battery from discharge rate, through the setting that sets up the diode in the inside at the linker, the effectual lithium iron phosphate battery that has reduced when can to the electric capacity charge, lithium iron phosphate battery lack of voltage and lead to the electric capacity reverse for the phenomenon of can that charges of lithium iron phosphate battery, improved the device accuracy when actual detection.
Drawings
FIG. 1 is an isometric view of the present invention;
FIG. 2 is an isometric view of the upper and lower halves of the present invention;
FIG. 3 is an isometric view of a charging mechanism of the present invention;
FIG. 4 is an enlarged view of portion A of FIG. 3;
FIG. 5 is an overall structural view of the temperature adjusting mechanism of the present invention;
FIG. 6 is an isometric view of a clamping mechanism of the present invention;
FIG. 7 is an internal assembly view of the clamping mechanism of the present invention;
FIG. 8 is an internal assembly view of the shift drive mechanism of the present invention;
fig. 9 is a circuit diagram illustrating the operation principle of the current amplifier of the present invention.
In the figure: 1. a control terminal; 2. a power distribution cabinet; 3. a current detection meter; 4. a current amplifier; 5. detecting the lathe; 6. an energy charging mechanism; 61. rotating the circular ring table; 62. a connecting seat; 63. a contact block; 64. an insulating tube; 65. receiving a block; 66. a slide long hole; 67. guiding the wire harness; 68. adjusting the electrical receptacle; 69. connecting a wire harness; 7. a temperature adjustment mechanism; 71. sealing the turning plate; 72. placing a cover; 73. a through hole; 74. a seal strip; 75. the long hole is communicated; 76. an exhaust pipe; 77. a micro air conditioner; 78. a gas injection pipe; 79. a protective cover cylinder; 8. a clamping mechanism; 81. a drive motor; 82. the hinge long hole; 83. a communicating vessel; 84. a hinged block; 85. a limiting block; 86. a sealing cover; 87. a drive shaft; 9. a switching drive mechanism; 91. switching the motors; 92. a driving wheel; 93. a drive belt; 94. an input wheel; 95. a drive disc; 96. connecting columns; 97. positioning the ring table; 98. a trigger protrusion; 99. the long hole is penetrated; 10. a wire harness box; 11. clamping the frame; 12. connecting the long holes; 13. lithium iron phosphate lithium power pack.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that in the description of the present invention, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of description, and do not indicate or imply that the referred device or element must have a specific orientation, be configured in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Further, it will be appreciated that the dimensions of the various elements shown in the figures are not drawn to scale, for ease of description, and that the thickness or width of some layers may be exaggerated relative to other layers, for example.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus, once an item is defined or illustrated in one figure, it will not need to be further discussed or illustrated in detail in the description of the following figure.
As shown in fig. 1 to 9, the present invention provides a technical solution: the utility model provides a short-term test lithium iron phosphate lithium ion battery is from equipment of discharge rate, includes that the lithium iron phosphate lithium power pack 13, the mechanism 6 and the current detection table 3 of charging that install in proper order at detection lathe 5 top, wherein need notice is that, in this application, the mechanism 6 of charging establishes ties with lithium iron phosphate lithium power pack 13 and current detection table 3 mutually in proper order.
The following detailed description of the charging mechanism 6;
referring to fig. 3, in the present application, the energy charging mechanism 6 includes an adjusting capacitor seat 68, a rotating circular ring table 61 is rotatably connected to the outside of the adjusting capacitor seat 68, and an energy charging capacitor bank is installed inside the adjusting capacitor seat 68, wherein capacitors in the energy charging capacitor bank are connected in parallel, it should be noted that, in the present application, the capacitors in the energy charging capacitor bank can be freely detached and replaced, and it should be noted that, referring to fig. 3, when the capacitors in the adjusting capacitor seat 68 are installed, the placing seat at one end thereof is shifted to realize that the adjusting capacitor 68 is integrally opened, thereby completing installation and fixation of the capacitors.
Referring to fig. 4, in the present application, the clamping frames 11 are fixedly connected to two sides of one end of the outer portion of the rotating circular ring table 61, the inner portion of the clamping frame 11 is communicated with the inner portion of the rotating circular ring table 61, the wire harness boxes 10 are respectively installed in the two clamping frames 11, and input ends of the two wire harness boxes 10 are respectively communicated with the positive electrode and the negative electrode of the lithium iron phosphate lithium power supply group 13.
As can be seen from fig. 3, in the present application, the two sides of the other end inside the rotary circular ring table 61 are respectively fixed with a guide wire bundle 67, the head ends of the two guide wire bundles 67 are respectively fixedly connected with a switching member, it should be noted that in the present application, the switching member includes a receiving block 65, an insulating tube 64 and a contact block 63, wherein the receiving block 65 and the contact block 63 are connected and fixed through the insulating tube 64, it should be noted that the input end of the adjusting capacitor base 68 is a connecting base 62, when the lithium iron phosphate lithium power supply group 13 and the adjusting capacitor base 68 in the device are communicated, one side of the contact block 63 is fixed with the output end of the harness box 10, the other side of the contact block 63 is communicated with the adjusting capacitor base 68 through the connecting base 62, when the lithium iron phosphate lithium power supply group 13 and the adjusting capacitor base 68 in the device are not communicated, one side of the receiving block 65 is contacted with one end of the connecting base 62 when the rotary circular ring table 61 rotates, at this time, the electric energy absorbed by the adjusting electric receptacle 68 is transmitted into the guide wire harness 67 through the connecting base 62 and the receiving block 65, and is communicated with the positive and negative electrodes of the current detecting meter 3 along the communication wire harness 69.
It should be noted that, in the present application, the two sides of one end of the inner wall of the rotating circular ring table 61 are respectively opened with a sliding long hole 66, wherein the contact block 63 and the receiving block 65 are contacted with the input end of the adjusting capacitor seat 68 through the sliding long hole 66.
The features on the inspection lathe 5 are arranged and described below;
the method is characterized in that a clamping mechanism 8 is fixedly arranged at the bottom end of a detection lathe 5 at a lithium iron phosphate power supply group 13;
as can be seen from fig. 6 and 7, the clamping mechanism 8 includes a driving motor 81, a base of the driving motor 81 is fixed to one end of the bottom of the detection lathe 5, the other end of the bottom of the detection lathe 5 is fixedly connected to a sealing cover 86, an output end of the driving motor 81 is fixedly connected to a transmission shaft 87, and one end of the transmission shaft 87 penetrates through the sealing cover 86 and is hinged to one side of the inside of the sealing cover 86.
It should be noted that the driving motor 81 is a power input member of the gripping mechanism 8 in the present application.
It should be further noted that in the present application, threads with opposite threads are disposed on the outside of the transmission shaft 87, and hinged long holes 82 are disposed on two sides of one end of the detection lathe 5, where it should be noted that two ends of the outside of the transmission shaft 87 are respectively rotatably screwed with hinged blocks 84, two ends of the hinged blocks 84 are respectively slidably connected with two ends inside the sealing cover 86, the top of the hinged blocks 84 penetrates through the hinged long holes 82 and is fixedly connected with a connector 83, and a diode is disposed inside the connector 83.
Wherein need emphasize, this application sets up the setting of diode through the inside at linker 83 when in actual use, and the effectual lithium iron phosphate that has reduced is when filling the ability to electric capacity, and lithium iron phosphate is insufficient voltage and is leaded to the electric capacity to be the phenomenon of filling the ability of lithium iron phosphate backward, has improved the device accuracy when actual detection.
It should be further emphasized that, in the present application, the lithium iron phosphate lithium power supply group 13 is disposed between the two communicating vessels 83, and the positive electrode and the negative electrode of the lithium iron phosphate lithium power supply group 13 are respectively communicated with the input ends of the communicating vessels 83.
It should be noted that, in this application, the transmission shaft 87 is hinged with a limiting block 85 at two opposite threaded joints, the top end of the limiting block 85 is fixed to the bottom of the detection lathe 5, and the limiting block 85 plays a role in blocking, so that the two hinged blocks 84 are prevented from contacting with each other when moving.
Secondly, the detection lathe 5 is fixedly connected with a temperature adjusting mechanism 7 outside the lithium iron phosphate power supply unit 13;
referring to fig. 5, in the present application, the temperature adjustment mechanism 7 includes a placing cover 72, wherein the bottom of the placing cover 72 is fixed to the top of the detection lathe 5, the top of the placing cover 72 is rotatably connected to a sealing turning plate 71, two sides of the top of the sealing turning plate 71 are respectively inserted with a protection cover cylinder 79, and the open ends of the two protection cover cylinders 79 are respectively in contact with the positive electrode and the negative electrode of the lithium iron phosphate lithium power supply group 13.
It should be noted that when the positive electrode and the negative electrode of the lithium iron phosphate lithium power supply group 13 work in the temperature adjustment mechanism 7, water dew may appear outside the positive electrode and the negative electrode, and the protective cover cylinder 79 plays a role in protecting the positive electrode and the negative electrode of the lithium iron phosphate lithium power supply group 13 during actual use in the present application, so as to reduce the influence of the water dew on the actual operation circuit of the device.
It should be further noted that, in this application, the two sides of the outside of the cover 72 are respectively provided with a communicating slot 75, the two sides of the inside of the cover 72 are respectively connected with a sealing strip 74 in a sliding manner, the two ends of the outside of the cover 72 are respectively provided with a through hole 73, and the sealing strip 74 and the through hole 73 are matched with each other, and it should be noted that, in this application, the sealing strip 74 plays a role in blocking the communicating slot 75, and the through hole 73 plays a role in expanding the range of motion of the sealing strip 74.
It should be further noted that, when the present application is used specifically, a hole is provided in the inside of the sealing strip 74, the input end of the communicating device 83 is installed together with the sealing strip 74 through the hole, and sequentially passes through the communicating long hole 75 to be connected with the connecting long hole 12 and the input end of the wire harness box 10, and it should be emphasized that, because the input end of the wire harness box 10 is a magnetic groove, the input end of the communicating device 83 can move when being communicated with the magnetic groove, so when the rotating ring table 61 rotates, the communicating device 83 can be separated from the magnetic groove under the rotating action, thereby realizing the mutual disconnection between the lithium iron phosphate power supply group 13 and the adjusting capacitor seat 68.
In addition, it should be noted that, referring to fig. 5, the temperature adjustment mechanism 7 further includes a micro air conditioner 77, a base of the micro air conditioner 77 is fixed to the bottom of the detection lathe 5, an output end of the micro air conditioner 77 is fixedly connected to an air injection pipe 78, an input end of the micro air conditioner 77 is fixedly connected to an exhaust pipe 76, one end of the air injection pipe 78 is fixed to one side of the exterior of the placing cover 72, and the placing cover 72, the air injection pipe 78, the micro air conditioner 77 and the exhaust pipe 76 are sequentially communicated.
It should be noted that, because the lithium iron phosphate battery is decomposed by the positive electrode material in the using process, the decomposition temperature of the lithium iron phosphate battery is 700 ℃, and the lithium iron phosphate battery can only release 54% when working at a low temperature, the current release probability of the lithium iron phosphate battery is increased by adjusting the external temperature of the existing lithium iron phosphate battery pack 13, and the detection accuracy is indirectly improved.
And thirdly, the bottom end of the detection lathe 5 at the energy charging mechanism 6 is fixedly connected with a switching driving mechanism 9.
As can be seen from fig. 8, in the present application, the switching drive mechanism 9 includes a positioning ring table 97 and a switching motor 91, wherein the bottom at detection lathe 5 is all fixed to position ring platform 97 and switching motor 91, the bottom of position ring platform 97 is rotated and is connected with driving-disc 95, the top fixedly connected with input wheel 94 of driving-disc 95, the output fixedly connected with drive wheel 92 of switching motor 91, driving belt 93 is installed in the winding between drive wheel 92 and the input wheel 94, in addition set up the slot hole 99 that runs through detection lathe 5 top in the bottom of position ring platform 97, drive-disc 95 and rotation ring platform 61 between through running through slot hole 99 fixedly connected with spliced pole 96, position ring platform 97 is installed respectively at the both ends of running through the inner wall of slot hole 99 and is triggered protruding 98, trigger protruding 98 and switching motor 91 electric connection, spliced pole 96 contacts with triggering protruding 98 when rotating.
It should be noted that, this device is when in actual use, switching motor 91 work drives drive wheel 92 and rotates, drive wheel 92 drives input wheel 94 through driving belt 93 and rotates, thereby make input wheel 94 drive position ring platform 97 rotate through spliced pole 96 when rotating, in addition owing to install respectively at the both ends of running through the slot hole 99 inner wall and trigger protruding 98 and switching motor 91 electric connection's setting, consequently when spliced pole 96 contacts with triggering protruding 98, switching motor 91 stop work, and realize position ring platform 97 and rotate switching circuit, need emphasize that in this application, run through the effect of the location that slot hole 99 still played.
And fourthly, a current amplifier 4 is installed between the current detection meter 3 and the energy charging mechanism 6 in a series flow mode, and the bottom end of the current amplifier 4 is fixed with the top of the detection lathe 5.
It should be noted that, referring to fig. 9, in the present application, the input power supply regulating capacitor receptacle 68 of the current amplifier 4 is controlled in a closed-loop manner by the output current, and an NPF triode is added in the circuit, wherein the current input to the current amplifier 4 is amplified by the NPF triode due to the current amplification characteristic of the NPF triode, and it should be emphasized that, since the current amplifier 4 is a mature prior art which is manufactured based on the current amplification characteristic of the triode, how to amplify the current amplifier 4 and the internal specific structural composition thereof are not specifically described in the present application.
And fifthly, a control terminal 1 is fixedly connected to one end of the top of the detection lathe 5.
And sixthly, a power distribution cabinet 2 is fixedly connected to one end of the bottom of the detection lathe 5.
Wherein control terminal 1 can control all electronic components that appear in this application scheme, and switch board 2 then supplies energy for all electronic components that appear in this application scheme.
In addition, the invention also provides a technical scheme that: a method for rapidly detecting the self-discharge rate of a lithium iron phosphate lithium ion battery comprises the following steps:
s1: placing one of a plurality of lithium iron phosphate lithium power supplies into a sealing cover with adjustable temperature, and adjusting the temperature in the sealing cover to 20-24 ℃;
s2: respectively connecting a lithium iron phosphate lithium power supply in series with a capacitor with an energy storage function;
s3: a diode is connected in series between the lithium iron phosphate power supply and a capacitor in the circuit;
s4: after the lithium iron phosphate lithium ion battery is placed for 3 to 5 hours, the lithium iron phosphate lithium ion battery and the capacitor are disconnected;
s5: the capacitor is connected with the current detection meter in series;
s6: a current amplifier is connected in series between the circuit between the capacitor and the current detection meter;
s6: observing the current value in the current detection meter;
s7: dividing lithium iron phosphate power supplies with the same discharge capacity into a group, and connecting the lithium iron phosphate power supplies in series and parallel;
s8: detecting the lithium iron phosphate power pack after series-parallel connection by using an open-circuit voltage attenuation rate measurement method;
s9: recording the voltage of the lithium iron phosphate power pack in any time period, and obtaining the charge state of the lithium iron phosphate power pack in the time period by comparing the voltage with the charge amount of the battery;
s10: and comparing the detected data with the attenuation slope of the voltage and the attenuation capacity corresponding to the unit time to calculate to obtain the self-discharge rate of the lithium iron phosphate lithium battery pack.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (11)
1. The utility model provides a short-term test lithium iron phosphate lithium ion battery is from equipment of discharge rate, includes to install in proper order at lithium iron phosphate lithium power pack (13) that detect lathe (5) top, fills can mechanism (6) and current detection table (3), its characterized in that: the energy charging mechanism (6) is sequentially connected with the lithium iron phosphate lithium power pack (13) and the current detection meter (3) in series;
the energy charging mechanism (6) comprises an adjusting capacitor seat (68), the outer part of the adjusting capacitor seat (68) is rotatably connected with a rotating circular ring table (61), an energy charging capacitor bank is installed in the adjusting capacitor seat (68), and capacitors in the energy charging capacitor bank are connected in parallel;
the two sides of one end of the outer part of the rotary circular ring table (61) are fixedly connected with clamping frames (11) respectively, the inner part of each clamping frame (11) is communicated with the inner part of the rotary circular ring table (61), wire harness boxes (10) are arranged in the two clamping frames (11) respectively, and the input ends of the two wire harness boxes (10) are communicated with the positive electrode and the negative electrode of the lithium iron phosphate lithium power pack (13) respectively;
two sides of the other end inside the rotating circular ring table (61) are respectively fixed with a guide wire harness (67), the head ends of the two guide wire harnesses (67) are respectively and fixedly connected with a switching piece, one end of the switching piece is respectively communicated with the output end of the harness box (10) and the input end of the adjusting electric accommodation seat (68), and the other end of the switching piece is only communicated with the input end of the adjusting electric accommodation seat (68) when the rotating circular ring table (61) rotates;
the tail ends of the two diversion wire harnesses (67) are respectively and fixedly connected with a communication wire harness (69), and one end of each of the two communication wire harnesses (69) penetrates through the rotary circular table (61) and is respectively communicated with the positive electrode and the negative electrode of the current detection meter (3).
2. The apparatus for rapidly detecting the self-discharge rate of the lithium iron phosphate lithium ion battery according to claim 1, wherein: the switching piece comprises a receiving block (65), an insulating tube (64) and a contact block (63), the receiving block (65) and the contact block (63) are connected and fixed through the insulating tube (64), the input end of the adjusting electricity storage seat (68) is a connecting seat (62), one end of the receiving block (65) is fixed and communicated with the head end of the flow guide wiring harness (67), one side of the receiving block (65) is in contact with one end of the connecting seat (62) when the rotating circular ring table (61) rotates, one side of the contact block (63) is fixed with the output end of the wiring harness box (10), and the other side of the contact block (63) is in contact with one end of the connecting seat (62).
3. The apparatus for rapidly detecting the self-discharge rate of the lithium iron phosphate lithium ion battery according to claim 2, wherein: two sides of one end of the inner wall of the rotary circular ring table (61) are respectively provided with a sliding long hole (66), and the contact block (63) and the receiving block (65) are in contact with the input end of the adjusting electricity-saving seat (68) through the sliding long holes (66).
4. The apparatus for rapidly detecting the self-discharge rate of the lithium iron phosphate lithium ion battery according to claim 1, wherein: the bottom end of the detection lathe (5) at the lithium iron phosphate power supply unit (13) is fixedly provided with a clamping mechanism (8), the clamping mechanism (8) comprises a driving motor (81), a base of the driving motor (81) is fixed with one end of the bottom of the detection lathe (5), the other end of the bottom of the detection lathe (5) is fixedly connected with a sealing cover (86), the output end of the driving motor (81) is fixedly connected with a transmission shaft (87), and one end of the transmission shaft (87) penetrates through the sealing cover (86) and is hinged with one side of the interior of the sealing cover;
the thread that the line is opposite is seted up to the outside of transmission shaft (87), articulated slot hole (82) have been seted up respectively to the both sides of detecting lathe (5) one end, the outside both ends of transmission shaft (87) rotate the spiro union respectively and have articulated piece (84), the both ends of articulated piece (84) respectively with the inside both ends looks sliding connection of sealed cowling (86), articulated piece (84) top is passed articulated slot hole (82) fixedly connected with linker (83), the inside of linker (83) is provided with the diode, lithium iron phosphate lithium power pack (13) are placed between two linker (83), and the positive negative pole of lithium iron phosphate lithium power pack (13) is linked together with the input of linker (83) respectively.
5. The apparatus for rapidly detecting the self-discharge rate of lithium iron phosphate lithium ion battery according to claim 4, wherein: the transmission shaft (87) is hinged with a limiting block (85) at the joint of two opposite threads, and the top end of the limiting block (85) is fixed with the bottom of the detection lathe (5).
6. The apparatus for rapidly detecting the self-discharge rate of lithium iron phosphate lithium ion battery according to claim 4, wherein: the detection lathe (5) is fixedly connected with a temperature adjusting mechanism (7) outside the lithium iron phosphate power pack (13);
the temperature adjusting mechanism (7) comprises a placing cover (72), the bottom of the placing cover (72) and the top of the detection lathe (5) are fixed, the top of the placing cover (72) is rotatably connected with a sealing turning plate (71), two sides of the top of the sealing turning plate (71) are respectively inserted with a protective cover cylinder (79), and the open ends of the two protective cover cylinders (79) are respectively contacted with the positive electrode and the negative electrode of the lithium iron phosphate lithium power pack (13).
7. The apparatus for rapidly detecting the self-discharge rate of lithium iron phosphate lithium ion battery according to claim 6, wherein: two sides of the outer part of the placing cover (72) are respectively provided with a communicating long hole (75), two sides of the inner part of the placing cover (72) are respectively connected with a sealing strip (74) in a sliding manner, two ends of the outer part of the placing cover (72) are respectively provided with a through hole (73), and the sealing strip (74) is matched with the through hole (73);
connection slot hole (12) have been seted up to joint frame (11) outside, sealing strip (74) is run through to the input of linker (83) to pass intercommunication slot hole (75) in proper order and be connected with connection slot hole (12) with the input of pencil box (10) is connected.
8. The apparatus for rapidly detecting the self-discharge rate of lithium iron phosphate lithium ion battery according to claim 6, wherein: temperature adjustment mechanism (7) include miniature air conditioner (77), the base of miniature air conditioner (77) with the bottom of detecting lathe (5) is fixed, the output fixedly connected with gas injection pipe (78) of miniature air conditioner (77), the input fixedly connected with blast pipe (76) of miniature air conditioner (77), the one end of gas injection pipe (78) with it is fixed to place the outside one side of cover (72), it is linked together in proper order to place cover (72), gas injection pipe (78), miniature air conditioner (77) and blast pipe (76).
9. The apparatus for rapidly detecting the self-discharge rate of the lithium iron phosphate lithium ion battery according to claim 1, wherein: the bottom end of the detection lathe (5) at the energy charging mechanism (6) is fixedly connected with a switching driving mechanism (9);
the switching driving mechanism (9) comprises a positioning ring table (97) and a switching motor (91), the positioning ring table (97) and the switching motor (91) are fixed at the bottom of the detection lathe (5), the bottom of the positioning ring table (97) is rotatably connected with a driving disc (95), the top end of the driving disc (95) is fixedly connected with an input wheel (94), the output end of the switching motor (91) is fixedly connected with a driving wheel (92), and a driving belt (93) is wound between the driving wheel (92) and the input wheel (94);
the bottom of position ring platform (97) is seted up and is run through slot hole (99) that runs through detection lathe (5) top, through running through slot hole (99) fixedly connected with spliced pole (96) between driving-disc (95) and the rotation ring platform (61), position ring platform (97) are installed respectively at the both ends of running through slot hole (99) inner wall and are triggered protruding (98), trigger protruding (98) and switching motor (91) electric connection, spliced pole (96) contact with trigger protruding (98) when rotating.
10. The apparatus for rapidly detecting the self-discharge rate of the lithium iron phosphate lithium ion battery according to claim 1, wherein: a current amplifier (4) is arranged between the current detection meter (3) and the energy charging mechanism (6) in a series flow mode, the bottom end of the current amplifier (4) is fixed to the top of the detection lathe (5), one end of the top of the detection lathe (5) is fixedly connected with a control terminal (1), and one end of the bottom of the detection lathe (5) is fixedly connected with a power distribution cabinet (2).
11. A method for rapidly detecting the self-discharge rate of a lithium iron phosphate lithium ion battery is characterized by comprising the following steps: the detection method adopts any one of the devices for rapidly detecting the self-discharge rate of the lithium iron phosphate lithium ion battery as set forth in claims 1 to 10, and comprises the following detection steps:
s1: placing one of a plurality of lithium iron phosphate lithium power supplies into a sealing cover with adjustable temperature, and adjusting the temperature in the sealing cover to 20-24 ℃;
s2: respectively connecting a lithium iron phosphate lithium power supply in series with a capacitor with an energy storage function;
s3: a diode is connected in series between the lithium iron phosphate power supply and a capacitor in the circuit;
s4: after the lithium iron phosphate lithium ion battery is placed for 3 to 5 hours, the lithium iron phosphate lithium ion battery and the capacitor are disconnected;
s5: the capacitor is connected with the current detection meter in series;
s6: a current amplifier is connected in series between the circuit between the capacitor and the current detection meter;
s6: observing the current value in the current detection meter;
s7: dividing lithium iron phosphate power supplies with the same discharge capacity into a group, and connecting the lithium iron phosphate power supplies in series and parallel;
s8: detecting the lithium iron phosphate power pack after series-parallel connection by using an open-circuit voltage attenuation rate measurement method;
s9: recording the voltage of the lithium iron phosphate power pack in any time period, and obtaining the charge state of the lithium iron phosphate power pack in the time period by comparing the voltage with the charge amount of the battery;
s10: and comparing the detected data with the attenuation slope of the voltage and the attenuation capacity corresponding to the unit time to calculate to obtain the self-discharge rate of the lithium iron phosphate lithium battery pack.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114813616A (en) * | 2022-06-29 | 2022-07-29 | 四川富临新能源科技有限公司 | Device and method for detecting carbon content in lithium iron phosphate |
| CN115512500A (en) * | 2022-09-09 | 2022-12-23 | 国网四川雅安电力(集团)股份有限公司雨城供电公司 | Safety protection equipment for power equipment maintenance |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011034201A1 (en) * | 2009-09-17 | 2011-03-24 | Hitachi Koki Co., Ltd. | Battery pack and power tool using the same |
| CN102508173A (en) * | 2011-11-30 | 2012-06-20 | 江苏富朗特新能源有限公司 | Self-discharge detection method for lithium iron phosphate batteries |
| CN103048623A (en) * | 2011-10-14 | 2013-04-17 | 深圳市海盈科技有限公司 | Method for quickly detecting self discharge rate of lithium iron phosphate lithium-ion battery |
| CN106248702A (en) * | 2016-09-08 | 2016-12-21 | 华南理工大学 | In influence factor's detection method in a kind of lithium ion battery self discharge |
| CN108196200A (en) * | 2018-01-28 | 2018-06-22 | 复旦大学 | A kind of combined simulation appraisal procedure of lithium battery health and state-of-charge |
| CN210465638U (en) * | 2019-06-10 | 2020-05-05 | 广州普庆电子科技有限公司 | Lithium battery cell self-discharge rate testing device with automatic comparison and inspection functions |
| CN111640887A (en) * | 2020-04-23 | 2020-09-08 | 华富(江苏)锂电新技术有限公司 | Lithium iron phosphate soft package power lithium ion battery pack and battery replacement method |
| CN113466714A (en) * | 2021-07-29 | 2021-10-01 | 河南省鹏辉电源有限公司 | Lithium battery self-discharge rate evaluation method and device and computer equipment |
-
2022
- 2022-05-06 CN CN202210485239.7A patent/CN114578245B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011034201A1 (en) * | 2009-09-17 | 2011-03-24 | Hitachi Koki Co., Ltd. | Battery pack and power tool using the same |
| CN103048623A (en) * | 2011-10-14 | 2013-04-17 | 深圳市海盈科技有限公司 | Method for quickly detecting self discharge rate of lithium iron phosphate lithium-ion battery |
| CN102508173A (en) * | 2011-11-30 | 2012-06-20 | 江苏富朗特新能源有限公司 | Self-discharge detection method for lithium iron phosphate batteries |
| CN106248702A (en) * | 2016-09-08 | 2016-12-21 | 华南理工大学 | In influence factor's detection method in a kind of lithium ion battery self discharge |
| CN108196200A (en) * | 2018-01-28 | 2018-06-22 | 复旦大学 | A kind of combined simulation appraisal procedure of lithium battery health and state-of-charge |
| CN210465638U (en) * | 2019-06-10 | 2020-05-05 | 广州普庆电子科技有限公司 | Lithium battery cell self-discharge rate testing device with automatic comparison and inspection functions |
| CN111640887A (en) * | 2020-04-23 | 2020-09-08 | 华富(江苏)锂电新技术有限公司 | Lithium iron phosphate soft package power lithium ion battery pack and battery replacement method |
| CN113466714A (en) * | 2021-07-29 | 2021-10-01 | 河南省鹏辉电源有限公司 | Lithium battery self-discharge rate evaluation method and device and computer equipment |
Non-Patent Citations (2)
| Title |
|---|
| JIANCHAO LI 等: "The battery management system construction method study for the power lithium-ion battery pack", 《2017 2ND INTERNATIONAL CONFERENCE ON ROBOTICS AND AUTOMATION ENGINEERING (ICRAE)》 * |
| 秦覃: "锂电池自放电率检测系统设计与实现", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114813616A (en) * | 2022-06-29 | 2022-07-29 | 四川富临新能源科技有限公司 | Device and method for detecting carbon content in lithium iron phosphate |
| CN115512500A (en) * | 2022-09-09 | 2022-12-23 | 国网四川雅安电力(集团)股份有限公司雨城供电公司 | Safety protection equipment for power equipment maintenance |
| CN115512500B (en) * | 2022-09-09 | 2024-05-17 | 国网四川雅安电力(集团)股份有限公司雨城供电公司 | Safety protection equipment for overhauling power equipment |
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Address after: No. 58 Keyuan Road, Economic and Technological Development Zone, Shehong City, Suining City, Sichuan Province, 629200 Patentee after: Sichuan Fulin New Energy Technology Co.,Ltd. Address before: 629200 No. 1, floor 1, building 6, Hedong Avenue, Shehong Economic Development Zone, Suining City, Sichuan Province Patentee before: Sichuan Fulin New Energy Technology Co.,Ltd. |