A method and system for maintaining a battery pack loop

Abstract

The application relates to a battery pack loop maintenance method and system, and relates to the technical field of batteries, which comprises the following steps: collecting detection voltages and detection parameters of each battery in a battery pack; obtaining a voltage average value according to the detection voltages and a preset battery number; obtaining an adaptive voltage difference based on the detection parameters and the detection voltages; calculating a sum of the voltage average value and the adaptive voltage difference as a detection threshold value; when the detection voltage exceeds the detection threshold value, defining the battery with the detection voltage as a discharge battery, and discharging the discharge battery at a preset discharge voltage. The application has the effect of reducing excessive discharge of the battery and improving the uniformity of the battery pack voltage.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery pack loop maintenance method and system. BACKGROUND

[0002] A battery is a device that directly converts chemical energy or other forms of energy into electrical energy and supplies power to electrical equipment.

[0003] Generally, a battery pack is provided in a substation to maintain the operation of the substation. During the operation of the battery pack in the substation, different batteries age differently and produce different voltages during operation. When the voltage of a battery in the battery pack exceeds a predetermined fixed threshold, the discharge resistor pre-installed on the battery is started, and the battery is discharged through the resistor until the voltage returns to the normal voltage, and the discharge is stopped.

[0004] During voltage maintenance in the substation, the fixed threshold for voltage discharge judgment can cause misidentification of the battery voltage at the end of charging, so that the battery that can continue to charge is forced to discharge, and the situation of over-discharge of the battery occurs. SUMMARY

[0005] In order to reduce the over-discharge of the battery and improve the balance of the battery pack voltage, the present application provides a battery pack loop maintenance method and system.

[0006] In a first aspect, the present application provides a battery pack loop maintenance method, which adopts the following technical solution:

[0007] A battery pack loop maintenance method, comprising:

[0008] S10: collecting detection voltages and detection parameters of each battery in the battery pack;

[0009] S11: obtaining a voltage average value according to the detection voltages and a predetermined number of batteries;

[0010] S12: obtaining an adaptive voltage difference based on the detection parameters and the detection voltages;

[0011] S13: calculating the sum of the voltage average value and the adaptive voltage difference as a detection threshold;

[0012] S14: when the detection voltage exceeds the detection threshold, defining the battery with the detection voltage as a discharge battery, and discharging the discharge battery at a predetermined discharge voltage.

[0013] By adopting the above technical solution, the detection threshold is obtained by analyzing the detection voltages and the detection parameters, and when the detection voltage exceeds the detection threshold, the discharge battery is discharged, thereby reducing the over-discharge of the battery and improving the balance of the battery pack voltage.

[0014] Optionally, further comprising:

[0015] S20: updating the detection voltage;

[0016] S21: calculating the difference between the detection voltage before and after the update as the voltage change rate;

[0017] S22: collecting the battery type when the voltage change rate is less than the preset reference change rate;

[0018] S23: matching the negative pulse parameters according to the battery type, and controlling the preset detection device to output with the negative pulse parameters.

[0019] By adopting the above technical solution, the end of charging is identified by monitoring the voltage change rate, the negative pulse parameters are matched in combination with the battery type, and the charging gas evolution is weakened by using the negative pulse excitation, thereby improving the balance of the battery pack voltage and the charging efficiency.

[0020] Optionally, the verification method of the detection voltage comprises:

[0021] S30: collecting the connection position and detection specification of the detection device when the voltage change rate exceeds the preset abnormal change rate;

[0022] S31: retrieving the connector type from the detection specification;

[0023] S32: matching the clamping parameters according to the connector type, and controlling the preset clamping device to take out the connector at the detection position and move to the preset detection position with the clamping parameters;

[0024] S33: collecting the image detection information of the detection position;

[0025] S34: identifying the foreign object type and foreign object position from the image detection information;

[0026] S35: obtaining the insertion position according to the foreign object position when the foreign object type is the preset wiping type;

[0027] S36: identifying the wiping intensity according to the foreign object type;

[0028] S37: obtaining the fine line insertion parameters according to the wiping intensity and the insertion position when the wiping intensity exceeds the preset reference intensity, and controlling the preset fine line insertion device to operate with the fine line insertion parameters.

[0029] By adopting the above technical solution, when the voltage change rate is abnormal, the connector is taken out by the clamping device, the foreign object is identified by image recognition, and the fine line cleaning is used to eliminate the foreign object that can be wiped in the connector, thereby reducing the poor contact of the sensor connector caused by the foreign object, ensuring that the detection voltage truly reflects the battery state, and ensuring that the voltage can continue to be detected by automatically removing the foreign object.

[0030] Optionally, the method for obtaining the thin wire insertion parameter comprises:

[0031] S40: retrieving a pin distribution specification from the connector type;

[0032] S41: dividing the foreign object position into each extension range based on the pin distribution specification;

[0033] S42: obtaining the pin number by the extension range and the pin distribution specification;

[0034] S43: obtaining the marking range according to the pin number and the foreign object position;

[0035] S44: obtaining the extension direction by the marking range and the insertion position;

[0036] S45: calculating the difference between the wiping force and the reference force as the resistance force;

[0037] S46: obtaining the thin wire insertion parameter according to the resistance force and the extension direction.

[0038] Optionally, the method further comprises:

[0039] S50: obtaining the rotation direction by the extension direction and the insertion position, and controlling the thin wire extension device to rotate the thin wire according to the rotation direction;

[0040] S51: updating the image detection information;

[0041] S52: when the preset thin wire extension feature is recognized in the image detection information, recognizing the marking pin position in the marking range from the image detection information;

[0042] S53: obtaining each extension path according to the marking pin position, the preset extension mode and the preset offset angle range;

[0043] S54: obtaining the thin wire insertion parameter by the extension path and the rotation direction.

[0044] Optionally, the method further comprises:

[0045] S60: recognizing the contact area from the extension path;

[0046] S61: obtaining the thin wire normal pressure by combining the extension path and the preset thin wire specification;

[0047] S62: obtaining the friction coefficient according to the contact area;

[0048] S63: obtaining the extension friction force by the friction coefficient and the thin wire normal pressure;

[0049] S64: taking the shortest extension path of the extension friction consistent with the stopping force as a marking path;

[0050] S65: obtaining a fine line extension parameter based on the marking path.

[0051] Optionally, the determination method of the extension path comprises:

[0052] S70: identifying a fine line extension distance from the image detection information;

[0053] S71: obtaining a rebound force through the fine line extension distance and the fine line specification;

[0054] S72: obtaining a joint friction force based on the rebound force and the joint type;

[0055] S73: obtaining an inclination angle range through the joint friction force, a preset detection rotation speed range, and the fine line specification;

[0056] S74: obtaining each connection angle according to the inclination angle range and the marked pin position;

[0057] S75: obtaining an interval distance according to the connection angle and the pin distribution specification;

[0058] S76: updating an offset angle range based on the interval distance and the marked pin position, and obtaining an inclination position according to the maximum offset angle range;

[0059] S77: obtaining the extension path in combination with the connection angle, the inclination position, and the interval distance.

[0060] Optionally, the method further comprises:

[0061] S80: obtaining an inclination number through the maximum offset angle range and the inclination position when the maximum offset angle range is less than a preset reference inclination angle;

[0062] S81: obtaining a detection path in combination with the connection angle, the inclination position, and the interval distance;

[0063] S82: calling a pin specification from the joint type;

[0064] S83: obtaining a detection contact area according to the pin specification and the connection angle;

[0065] S84: obtaining a detection normal force through the connection angle and the fine line specification;

[0066] S85: obtaining a detection friction force based on the detection normal force and the detection contact area;

[0067] S86: obtaining a marked friction force according to the inclination number and the detection friction force;

[0068] S87: obtain the extension path by marking the friction force and the detection path.

[0069] Optionally, further comprising:

[0070] S90: take the detection path of the marked friction force greater than the resistance degree as the marked path;

[0071] S91: call the marked extension distance from the marked path;

[0072] S92: obtain the maximum extension distance by marking the range and the inclined position;

[0073] S93: take the marked path corresponding to the marked extension distance less than the maximum extension distance as the extension path.

[0074] In a second aspect, the application provides a battery loop maintenance system, which adopts the following technical solution:

[0075] A battery loop maintenance system comprises:

[0076] An acquisition module is configured to acquire a detection voltage and a detection parameter;

[0077] A memory is configured to store a program of a battery loop maintenance method;

[0078] A processor is configured to load and execute the program stored in the memory.

[0079] In summary, the application has at least one of the following beneficial technical effects:

[0080] 1. By analyzing the detection voltage and the detection parameter to obtain a detection threshold, when the detection voltage exceeds the detection threshold, the discharged battery is discharged to reduce the over-discharge of the battery and improve the uniformity of the battery voltage;

[0081] 2. By monitoring the voltage change rate to identify the end of charging, matching the negative pulse parameter according to the battery type, and using the negative pulse to stimulate and weaken the charging gas evolution, the charging efficiency is improved while the uniformity of the battery voltage is improved;

[0082] 3. When the voltage change rate is abnormal, the connector is taken out by the clamping device, the foreign matter is identified by image recognition, and the foreign matter that can be wiped in the connector is cleaned by thin wire to eliminate the foreign matter, reduce the poor contact of the sensor connector caused by the foreign matter, ensure that the detection voltage truly reflects the battery state, and ensure that the detection voltage can continue to be detected by automatically removing the foreign matter. BRIEF DESCRIPTION OF DRAWINGS

[0083] Figure 1 is a method flow of a battery loop maintenance method of an embodiment of the application Figure One ;

[0084] Figure 2 is a method flow of a battery pack loop maintenance method of an embodiment of the present application Figure Two . DETAILED DESCRIPTION

[0085] The present application will be further described in detail with reference to the accompanying drawings and embodiments.

[0086] With reference to Figure 1 , the embodiments of the present application disclose a battery pack loop maintenance method, comprising the following steps:

[0087] S10: Collecting detection voltages and detection parameters of each battery in the battery pack.

[0088] The detection voltage refers to the real-time voltage of each battery in the battery pack, and the parameter detected by the voltage sensor connected to the battery is taken as the detection voltage.

[0089] The detection parameter refers to the real-time temperature, internal resistance, current and health status of each battery in the battery pack, and the temperature, internal resistance, current and health status of the battery are calculated and detected by the composite battery sensor and the external Hall sensor connected to the battery, and the detection results are combined to obtain the detection parameter.

[0090] S11: Obtaining a voltage average value according to the detection voltage and a preset battery number.

[0091] The battery number is the total number of single batteries in the battery pack set by the technical personnel.

[0092] The voltage average value refers to the arithmetic average value of the real-time voltage of all single batteries in the battery pack, and the voltage average value is obtained by calculating and analyzing the detection voltage and the battery number. The calculation method of the voltage average value is known to those skilled in the art, and will not be described here.

[0093] S12: Obtaining an adaptive pressure difference based on the detection parameter and the detection voltage.

[0094] The adaptive pressure difference refers to a voltage equalization threshold that is dynamically adjusted in real time according to the state of the battery. The voltage change value of the detection voltage is retrieved through the detection voltage, and the adaptive pressure difference is matched from a preset battery comparison table through the voltage change value and the detection parameter.

[0095] In this embodiment, the adaptive pressure difference is set to a range of 10mV to 20mV, and the adaptive pressure difference setting range can be set by the operator in advance, which will not be described here.

[0096] The battery control table stores different voltage variation values corresponding to the adaptive voltage difference of the detection parameter. When the health state in the detection parameter is a high health state, the internal resistance is small, and the voltage variation increases. At this time, the adaptive voltage difference can be 10 mV. Conversely, the adaptive voltage difference is 20 mV. The parameters in the battery control table are set by the person skilled in the art according to the actual situation in advance, and are not described here.

[0097] S13: Calculate the sum of the voltage average and the adaptive voltage difference as the detection threshold.

[0098] The detection threshold refers to the voltage critical value for judging whether the single battery needs to be balanced. The sum of the voltage average and the adaptive voltage difference is calculated as the detection threshold.

[0099] S14: When the detection voltage exceeds the detection threshold, the battery with the detection voltage is defined as a discharge battery, and the discharge battery is discharged at a preset discharge voltage.

[0100] The discharge voltage is a voltage set by the technician for discharging the discharge battery. The discharge battery refers to a battery that needs to be discharged. When the detection voltage exceeds the detection threshold, it means that the battery needs to be discharged. Therefore, the battery with the detection voltage exceeding the detection threshold is defined as a discharge battery, and the discharge battery is discharged at the discharge voltage. Other batteries are boosted in voltage due to system clamping.

[0101] Reference Figure 2 It also includes:

[0102] S20: Update the detection voltage.

[0103] The detection voltage is re-acquired.

[0104] S21: Calculate the difference between the detection voltage before and after updating as the voltage variation rate.

[0105] The voltage variation rate refers to the rate at which the detection voltage changes. The difference between the detection voltage before and after updating is calculated as the voltage variation rate.

[0106] S22: When the voltage variation rate is less than a preset reference variation rate, the battery type is acquired.

[0107] The reference variation rate is a voltage variation critical value set by the technician for judging whether the battery has entered the end of charging.

[0108] The battery type refers to the chemical type and specification parameters of the battery. When the voltage variation rate is less than the reference variation rate, it means that the battery is about to be fully charged, and charging optimization needs to be started. Therefore, the chemical type and specification parameters of the battery are pre-input by the operator as the battery type.

[0109] S23: match the negative pulse parameters according to the battery type, and control the preset detection device to output the negative pulse parameters.

[0110] The detection device refers to a composite battery sensor, and the detection device has an adjustable negative pulse excitation function and is an output carrier of the negative pulse.

[0111] The negative pulse parameters refer to the characteristics of the reverse pulse electrical signal used for charging optimization, and the negative pulse parameters include pulse amplitude, pulse width, pulse frequency and the like. The negative pulse parameters are matched from the battery comparison table according to the battery type, and the detection device is controlled to output the negative pulse parameters.

[0112] The battery comparison table also stores negative pulse parameters corresponding to different battery types, which will not be described here.

[0113] The calibration method of the detection voltage includes:

[0114] S30: When the voltage change rate exceeds the preset abnormal change rate, the connection position and detection specification of the detection device are collected.

[0115] The abnormal change rate is a critical rate set by the technician to determine whether the detection voltage has abnormal fluctuations.

[0116] The connection position refers to the position where the detection device is connected to the connector, and the detection specification refers to the device specification of the detection device. When the voltage change rate exceeds the abnormal change rate, it indicates that foreign matter appears in the connector of the detection device, and then the connection position and detection specification pre-input by the operator are retrieved.

[0117] S31: Retrieve the connector type from the detection specification.

[0118] The connector type refers to the structural feature type of the connector on the detection device, and the connector type is retrieved from the detection specification. In this embodiment, the connector is square, and a groove for setting a metal pin is provided inside the square, and the metal pins are arranged regularly into the connector.

[0119] S32: According to the connector type, match the clamping parameters, and control the preset clamping device to take out the connector at the detection position and move to the preset detection position.

[0120] The clamping device is a pre-set mechanical claw. The detection position is a position set by the technician for detecting whether there is foreign matter in the connector.

[0121] The clamping parameters refer to the force and position parameters used to clamp and remove the connector on the detection device, and the clamping parameters are matched from the preset connector comparison table according to the connector type. In this embodiment, the connector type is plug-in type, and the mechanical claw clamps the connector to pull it out in the opposite direction of the connector insertion with a certain force.

[0122] S33: Collect image detection information of the detection position.

[0123] The image detection information refers to the image of the metal pin in the joint at the detection position, which can be obtained by a camera arranged at the detection position.

[0124] S34: Identify the foreign matter type and the foreign matter position from the image detection information.

[0125] The foreign matter type refers to the type of the foreign matter on the metal pin, such as dust, metal debris, oil stains, and fiber filaments, etc. Different types determine the wiping method (such as cleaning for hard foreign matters and scraping for oily foreign matters).

[0126] The foreign matter position refers to the position of the foreign matter on the metal pin, which is identified from the image detection information together with the foreign matter type. The method of identifying the type and position of the foreign matter from the image is well known to those skilled in the art, and will not be described here.

[0127] S35: When the foreign matter type is a preset wiping type, obtain the insertion position according to the foreign matter position.

[0128] The wiping type is a type of foreign matter that can be wiped by the technician. For example, dust, oil stains, and fiber filaments, etc.

[0129] The insertion position refers to the position for inserting the fine wire. When the foreign matter type is a wiping type, it means that the foreign matter can be wiped, and the foreign matter position is used as the insertion position. In this embodiment, the fine wire is a nylon wire with a rebounding ability.

[0130] S36: Identify the wiping intensity according to the foreign matter type.

[0131] The wiping intensity refers to the intensity that can wipe the foreign matter. The wiping intensity is obtained by analyzing the adhesion of the foreign matter and matching it from a preset foreign matter reference table according to the foreign matter type.

[0132] The foreign matter reference table stores the wiping intensity corresponding to different states (concentration, size, etc.) of different foreign matter types. The parameters in the foreign matter reference table are set by the technician according to the actual situation, and will not be described here.

[0133] S37: When the wiping intensity exceeds a preset reference intensity, obtain the fine wire insertion parameter according to the wiping intensity and the insertion position, and control the preset fine wire extension device to operate at the fine wire insertion parameter.

[0134] The reference intensity is the intensity at which the fine wire elastically deforms, which is set by the technician.

[0135] The fine wire extension device can be a wire reel and a rotary motor, etc.

[0136] The fine wire insertion parameter refers to a parameter for controlling the fine wire insertion connector to contact and abut at the end of each pin. The fine wire insertion parameter includes an insertion position, a direction of rotation along the fine wire axis, a rotation speed, a fine wire movement path, and the like. When the erasing force exceeds the reference force, it indicates that the fine wire will be elastically deformed when wiping off the foreign matter, and it is not easy to wipe off the foreign matter. Therefore, the fine wire insertion parameter is obtained by analyzing the erasing force and the insertion position, and the fine wire insertion device is controlled to operate the fine wire insertion device, so as to control the fine wire insertion device to wipe off the foreign matter position after the fine wire insertion is completed.

[0137] The method for obtaining the fine wire insertion parameter includes:

[0138] S40: retrieve the pin distribution specification from the connector type.

[0139] The pin distribution specification refers to the spatial arrangement characteristics of the pins in the connector. The pin distribution specification includes the number of pins, the spacing, the arrangement mode, the pin diameter, and the pin height. The pin distribution specification is retrieved from the connector type.

[0140] S41: divide the foreign matter position into each extension range based on the pin distribution specification.

[0141] The extension range refers to each range in which the fine wire can be extended. Based on the foreign matter position, the surrounding pin distribution is divided into a range in the form of a rectangle, and the divided range is taken as the extension range.

[0142] S42: obtain the pin number by the extension range and the pin distribution specification.

[0143] The pin number refers to the total number of pins in the extension range. The number of pins in the extension range is retrieved from the pin distribution specification as the pin number.

[0144] S43: obtain the marking range according to the pin number and the foreign matter position.

[0145] The marking range refers to the extension range with the most pins or closest to the foreign matter position. By comparing the pin numbers of each extension range, the extension range with the most pins is taken as the marking range. When the maximum pin numbers of two ranges are the same, the extension range with the maximum pin number closest to the foreign matter position is taken as the marking range.

[0146] S44: obtain the extension direction by the marking range and the insertion position.

[0147] The extension direction refers to the direction in which the fine wire extends from the insertion position to the marking range. The straight line direction obtained by analyzing the position of the marking range and the insertion position is taken as the extension direction.

[0148] S45: Calculate the difference between the erasing force and the reference force as the stopping force.

[0149] The stopping force refers to the force required to prevent the end of the thin wire extending into the connector from moving. The difference between the erasing force and the reference force is calculated as the stopping force. In this embodiment, the end of the thin wire extending into the connector is defined as the extending end of the thin wire.

[0150] S46: Obtain the extending parameter of the thin wire according to the stopping force and the extending direction.

[0151] The extending parameter of the thin wire is obtained by analyzing the stopping force and the extending direction.

[0152] Also includes:

[0153] S50: Obtain the rotating direction by the extending direction and the extending position, and control the thin wire extending device to rotate the thin wire according to the rotating direction.

[0154] In this embodiment, the thin wire extends towards the inner side wall of the mark in the connector, and the inner side wall of the mark refers to the inner side wall where the end of the metal pin is fixed.

[0155] The rotating direction refers to the direction of the thin wire rotating along its own axis, and the rotating direction includes clockwise or counterclockwise. The thin wire extending device is controlled to rotate the thin wire according to the rotating direction.

[0156] S51: Update the image detection information.

[0157] Recollect the image detection information.

[0158] S52: When the preset thin wire extending feature is identified in the image detection information, identify the mark pin position within the mark range from the image detection information.

[0159] The thin wire extending feature is a feature set by the technician, in which the thin wire abuts against the inner side wall of the mark and slides and bends on the inner side wall of the mark.

[0160] The mark pin position refers to the pin position within the mark range. When the preset thin wire extending feature is identified in the image detection information, it means that the extending end of the thin wire abuts against the inner side wall of the mark and slides and bends on the inner side wall of the mark. Therefore, the pin position within the mark range is identified as the mark pin position from the image detection information.

[0161] S53: Obtain each extending path according to the mark pin position, the preset extending manner, and the preset offset angle range.

[0162] The extending manner is a manner set by the technician in which the thin wire winds around the pin. The extending manner is a manner in which the pin prevents elastic deformation, and the pin always prevents the wire from becoming a straight line due to its own rebound.

[0163] The offset angle range is a fine line set by the technical personnel. The offset angle range is the angle range of the fine line when the fine line is wound on the metal pin without plastic deformation of the fine line.

[0164] The extension path refers to the path of the fine line extending in the extension mode with the corresponding offset angle range. Different extension paths are provided around different marker pin positions.

[0165] S54: Obtain the fine line extension parameter by the extension path and the rotation direction.

[0166] The fine line extension parameter is obtained by analyzing the extension path and the rotation direction.

[0167] Further comprising:

[0168] S60: Identify the contact area from the extension path.

[0169] The contact area refers to the area of the fine line contacting each metal pin in the extension path. The contact area is obtained by analyzing the extension path. The analysis method of the contact area can be determined by the subsequent analysis method of the extension path.

[0170] S61: Obtain the fine line normal pressure by combining the extension path and the fine line specification.

[0171] The fine line specification is a parameter specification of the fine line set by the technical personnel. The fine line normal pressure refers to the normal pressure generated by the fine line rebound on the metal pin when the fine line is wound on the metal pin.

[0172] S62: Obtain the friction coefficient according to the contact area.

[0173] The friction coefficient refers to the friction coefficient between the fine line and the metal pin. The friction coefficient is matched from a preset friction reference table according to the contact area. The friction reference table stores different friction coefficients corresponding to different contact areas. The larger the contact area, the larger the friction coefficient. The parameters in the friction reference table are set by the technical personnel in the field according to the actual situation in advance. No further description is made here.

[0174] S63: Obtain the extension friction force by the friction coefficient and the fine line normal pressure.

[0175] The extension friction force refers to the sliding friction force generated when the fine line contacts the pin side wall. The extension friction force is calculated by the friction coefficient and the fine line normal pressure. The calculation method of the extension friction force is known to the technical personnel in the field. No further description is made here.

[0176] S64: Take the shortest extension path of the extension friction force consistent with the resistance degree as the marker path.

[0177] The marking path refers to the path of the final thin line moving and winding. The shortest extension path of the extension friction consistent with the resistance degree is taken as the marking path.

[0178] S65: obtaining the thin line extension parameter based on the marking path.

[0179] The thin line extension parameter is obtained by taking the extension direction of the thin line and the parameter corresponding to the extension of the marking path.

[0180] The thin line extension parameter includes the extension direction, the marking path, the foreign object position, the extension position, the maximum deviation angle range, and the rotation direction (the change of the direction when the thin line is wound in the extension mode, and the rotation direction also changes), so that the thin line can be controlled to move and wind in the pin.

[0181] The determination method of the extension path includes:

[0182] S70: identifying the thin line extension distance from the image detection information.

[0183] The thin line extension distance refers to the distance of the extension of the thin line on the inner wall of the joint, which is identified from the image detection information.

[0184] S71: obtaining the rebound degree by the thin line extension distance and the thin line specification.

[0185] The rebound degree refers to the elastic recovery force generated by the bending of the thin line, which is obtained by analyzing the thin line extension distance and the thin line specification. The analysis method of the rebound degree is known to those skilled in the art, and will not be described here.

[0186] S72: obtaining the joint friction based on the rebound degree and the joint type.

[0187] The joint friction refers to the friction between the thin line and the inner wall of the joint, which is obtained by analyzing the rebound degree, the material of the inner wall of the joint, and the friction coefficient between the thin line.

[0188] S73: obtaining the inclination angle range by the joint friction, the preset detection rotation speed range, and the thin line specification.

[0189] The detection rotation speed range is the speed interval of the thin line rotating along its own axis set by the technician. In the detection rotation speed range, the faster the speed, the greater the friction coefficient.

[0190] The inclination angle range refers to the interval of the angle of the bending of the thin wire after being wound around the pin. The inclination angle range is matched from the friction comparison table according to the joint friction, the preset detection rotation speed range, and the thin wire specification. The inclination angle range corresponding to different joint frictions, preset detection rotation speed ranges, and thin wire specifications is also stored in the friction comparison table. The greater the joint friction, the greater the force that the thin wire can resist when rotating, and the greater the inclination angle range. Details are not described herein.

[0191] S74: Obtain each connection angle according to the inclination angle range and the marked pin position.

[0192] The connection angle refers to the angle at which the thin wire needs to be inclined when contacting the marked pin position. For example, the thin wire is inclined in the direction of the insertion position, and the thin wire can be extended to other different marked pin positions at 10 degrees or 30 degrees for winding. 10 degrees or 30 degrees needs to be within the inclination angle range, and 10 degrees or 30 degrees is the connection angle.

[0193] S75: Obtain the interval distance according to the connection angle and the pin distribution specification.

[0194] The interval distance refers to the distance between the marked pin positions when the thin wire is extended to the marked pin positions at different connection angles. The interval distance is obtained by analyzing the connection angle and the pin distribution specification. The analysis method of the interval distance is known to those skilled in the art, and details are not described herein.

[0195] S76: Update the offset angle range based on the interval distance and the marked pin position, and obtain the inclination position according to the maximum offset angle range.

[0196] The inclination position refers to the marked pin position that the thin wire can reach due to inclination. The new offset angle range is matched from the preset thin wire comparison table according to the interval distance and the number of marked pin positions, and the marked pin position within the maximum offset angle range is taken as the inclination position. The analysis method of the inclination position is known to those skilled in the art, and details are not described herein.

[0197] The thin wire comparison table stores different offset angle ranges corresponding to different interval distances and marked pin positions. The smaller the interval distance, the greater the number of marked pin positions, the greater the constraint on the direction offset of the thin wire, and the smaller the offset angle range. The parameters in the thin wire comparison table are set by those skilled in the art according to actual conditions, and details are not described herein.

[0198] S77: Obtain the extension path by combining the connection angle, the inclination position, and the interval distance.

[0199] The extension path is obtained by analyzing the connection angle, the inclination position, and the interval distance.

[0200] Also included are:

[0201] S80: When the maximum offset angle range is less than the preset reference tilt angle, the tilt number is obtained by the maximum offset angle range and the tilt position.

[0202] The reference tilt angle is the minimum angle value set by the technician for the fine wire to extend and wrap.

[0203] The tilt number refers to the number of tilts that the fine wire can make when wrapping around the tilt position and the maximum offset angle range.

[0204] When the maximum offset angle range is less than the reference tilt angle, it means that the fine wire cannot continue to extend and wrap, so the fine wire is wrapped from the insertion position, and the number of tilt positions corresponding to the maximum offset angle range that is not less than the reference tilt angle is taken as the tilt number.

[0205] S81: Obtain the detection path by combining the connection angle, tilt position and interval distance.

[0206] The detection path refers to the path of the fine wire when it is tilted and wrapped around the connection angle, tilt position and interval distance. The detection path is obtained by analyzing the connection angle, tilt position and interval distance.

[0207] For example, two columns of pins are A1, A2, A3 and B1, B2, B3. The fine wire is wrapped around the two columns of pins at the insertion position, and when the fine wire is offset by 10 degrees, the fine wire can be wrapped around A1, A2, A3 or B1, B2, B3 in an S shape. When the fine wire is offset by 30 degrees, the fine wire can be wrapped from A1 to B2, and then from B2 to A3. The more the number of pins wrapped, the more the fine wire can only be wrapped around one column of pins. The path formed by the above wrapping A1, A2, A3, B1, B2, B3 and the path formed by the wrapping A1, B2, A3 is taken as the detection path.

[0208] S82: Retrieve the pin specification from the connector type.

[0209] The pin specification refers to the parameter specification of the pin, including the pin diameter, column spacing, pin spacing within a single column, and pin size.

[0210] S83: Obtain the detection contact area according to the pin specification and the connection angle.

[0211] The detection contact area refers to the contact area of a single pin with the thin wire when the thin wire is wound at the connection angle, and the detection contact area is obtained by analyzing the pin specification and the connection angle. The analysis method of the detection contact area is well known to those skilled in the art, and will not be repeated here.

[0212] S84: Obtain the detection normal pressure by the connection angle and the thin wire specification.

[0213] The detection normal pressure refers to the rebound force generated by the thin wire wound at the connection angle on a single pin, and the detection normal pressure is obtained by analyzing the connection angle and the thin wire specification. The analysis method of the detection normal pressure is well known to those skilled in the art, and will not be repeated here.

[0214] S85: Obtain the detection friction force based on the detection normal pressure and the detection contact area.

[0215] The detection friction force refers to the friction force between a single pin and the thin wire, and the detection friction force is matched from the friction reference table by the detection normal pressure and the detection contact area. The friction reference table also stores the detection friction force corresponding to different detection normal pressures and detection contact areas. The greater the detection normal pressure and the detection contact area, the greater the detection friction force. This will not be repeated here.

[0216] S86: Obtain the marked friction force according to the number of inclinations and the detection friction force.

[0217] The marked friction force refers to the friction force generated by all pins on the thin wire when the thin wire is wound. The marked friction force is matched from the friction reference table by the number of inclinations and the detection friction force. The friction reference table also stores the marked friction force corresponding to different numbers of inclinations and detection friction forces. The greater the number of inclinations and the detection friction force, the greater the marked friction force. This will not be repeated here.

[0218] S87: Obtain the extension path by the marked friction force and the detection path.

[0219] The extension path is obtained by analyzing the marked friction force and the detection path.

[0220] Also includes:

[0221] S90: Take the detection path of the marked friction force greater than the resistance degree as the marked path.

[0222] The marked path refers to the detection path of the marked friction force greater than the resistance degree, and the detection path of the marked friction force greater than the resistance degree is taken as the marked path.

[0223] S91: Retrieve the marked extension distance from the marked path.

[0224] The mark extension distance refers to a straight line distance of the fine line extending and winding, and the mark extension distance is obtained by calling the mark extension distance from the mark path.

[0225] S92: obtaining the maximum extension distance by the mark range and the inclined position.

[0226] The maximum extension distance refers to a maximum straight line distance of the mark range winding and extending at the inclined position, and the maximum extension distance is obtained by analyzing the mark range and the inclined position. The analysis method of the maximum extension distance is well known to those skilled in the art, and is not described here.

[0227] S93: taking the mark path corresponding to the mark extension distance smaller than the maximum extension distance as the extension path.

[0228] The mark path corresponding to the mark extension distance smaller than the maximum extension distance is taken as the extension path.

[0229] Based on the same inventive concept, the embodiment of the present application provides a battery pack loop maintenance system, comprising:

[0230] The acquisition module is configured to acquire a detection voltage, a detection parameter, a battery type, a connection position, a detection specification, and image detection information.

[0231] The memory is configured to store a program of a battery pack loop maintenance method.

[0232] The processor is configured to load and execute the program stored in the memory.

[0233] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above functional modules is exemplified, and in actual application, the above functions can be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. The specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiments, which will not be described here.

[0234] The above is only the preferred embodiment of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical solution falling within the concept of the present application shall be considered as falling within the protection scope of the present application. It should be noted that, for those skilled in the art, some improvements and refinements without departing from the principles of the present application shall also be considered as falling within the protection scope of the present application.

Claims

1. A method of maintaining a battery pack loop, characterized by, The method comprises the following steps: S10: collecting detection voltages and detection parameters of each battery in the battery pack, the detection parameters being real-time temperature, internal resistance, current and health status parameters of each battery in the battery pack; S11: obtaining a voltage average value according to the detection voltages and a preset number of batteries; S12: obtaining an adaptive voltage difference based on the detection parameters and the detection voltages; S13: calculating a sum of the voltage average value and the adaptive voltage difference as a detection threshold value; S14: defining a battery with a detection voltage exceeding the detection threshold value as a discharge battery, and discharging the discharge battery at a preset discharge voltage; The method further comprises the following steps: S20: updating the detection voltages; S21: calculating a difference between the updated detection voltages as a voltage change rate; S22: collecting a battery type when the voltage change rate is less than a preset reference change rate; S23: matching a negative pulse parameter according to the battery type, and controlling a preset detection device to output the negative pulse parameter; The method for verifying the detection voltages comprises the following steps: S30: collecting a connection position and a detection specification of the detection device when the voltage change rate exceeds a preset abnormal change rate; S31: calling a pin type from the detection specification; S32: matching a clamping parameter according to the pin type, and controlling a preset clamping device to take out a pin at the detection position and move to a preset detection position according to the clamping parameter; S33: collecting image detection information of the detection position; S34: identifying a foreign object type and a foreign object position from the image detection information; S35: obtaining a penetration position according to the foreign object position when the foreign object type is a preset erasing type; S36: identifying an erasing force according to the foreign object type; S37: obtaining a fine line penetration parameter according to the erasing force and the penetration position when the erasing force exceeds a preset reference force, the reference force being a force at which the fine line elastically deforms.

2. The method of claim 1, wherein, The method for obtaining the fine line penetration parameter comprises the following steps: S40: calling a pin distribution specification from the pin type; S41: dividing the foreign object position into each extension range based on the pin distribution specification; S42: obtaining a pin number according to the extension range and the pin distribution specification; S43: obtaining a marking range according to the pin number and the foreign object position; S44: obtaining an extension direction according to the marking range and the penetration position; S45: calculating a difference between the erasing force and the reference force as a resistance force; S46: obtaining the fine line penetration parameter according to the resistance force and the extension direction.

3. The method of claim 2, wherein the step of determining the state of charge of the battery pack comprises the step of: The method further comprises the following steps: ​ S50: obtaining a rotation direction according to the extension direction and the penetration position, and rotating the fine line by the fine line extension device according to the rotation direction; S51: updating the image detection information; S52: identifying a marked pin position in the marking range from the image detection information when a preset fine line extension feature is identified in the image detection information; S53: obtaining each extension path according to the marked pin position, a preset extension mode and a preset offset angle range; S54: obtaining the fine line penetration parameter according to the extension path and the rotation direction.

4. The method of claim 3, wherein the step of determining the state of charge of the battery pack comprises the step of: The method further comprises the following steps: ​ S60: identifying a contact area from the extension path; S61: combining the extension path with the preset thin wire specification to obtain a thin wire normal pressure; S62: obtaining a friction coefficient according to the contact area; S63: obtaining an extension friction force by the friction coefficient and the thin wire normal pressure; S64: taking the shortest extension path of the extension friction force consistent with the resistance degree as a marking path; S65: obtaining a thin wire extension parameter based on the marking path.

5. The method of claim 3, wherein the step of determining the state of charge of the battery pack includes the step of: The determination method of the extension path comprises: ​ S70: identifying a thin wire extension distance from the image detection information; S71: obtaining a rebound degree by the thin wire extension distance and the thin wire specification; S72: obtaining a joint friction force based on the rebound degree and the joint type; S73: obtaining an inclination angle range by the joint friction force, a preset detection rotation speed range and the thin wire specification; S74: obtaining each connection angle according to the inclination angle range and the marking pin position; S75: obtaining an interval distance according to the connection angle and the pin distribution specification; S76: updating an offset angle range based on the interval distance and the marking pin position, and obtaining an inclination position according to the maximum offset angle range; S77: combining the connection angle, the inclination position and the interval distance to obtain the extension path.

6. A method of maintaining a battery pack circuit according to claim 5, wherein, Further comprising: S80: obtaining an inclination number by the maximum offset angle range and the inclination position when the maximum offset angle range is less than a preset reference inclination angle; S81: combining the connection angle, the inclination position and the interval distance to obtain a detection path; S82: calling a pin specification from the joint type; S83: obtaining a detection contact area according to the pin specification and the connection angle; S84: obtaining a detection normal pressure by the connection angle and the thin wire specification; S85: obtaining a detection friction force based on the detection normal pressure and the detection contact area; S86: obtaining a marking friction force according to the inclination number and the detection friction force; S87: obtaining the extension path by the marking friction force and the detection path.

7. A method of maintaining a battery pack circuit according to claim 6, wherein, Further comprising: S90: taking the detection path of the marking friction force greater than the resistance degree as the marking path; S91: calling a marking extension distance from the marking path; S92: obtaining a maximum extension distance by the marking range and the inclination position; S93: taking the marking path corresponding to the marking extension distance less than the maximum extension distance as the extension path.

8. A battery pack loop maintenance system, characterized by, Comprise: an acquisition module, configured to acquire a detection voltage and a detection parameter; a memory, configured to store a program for implementing the battery loop maintenance method according to any one of claims 1 to 7; a processor, configured to load and execute the program stored in the memory.

Images