Detection system and detection equipment for contact impedance and temperature of battery

Abstract

The invention provides a detection system and detection equipment for contact resistance and temperature of a battery, and the detection system comprises a battery positive pole column, a battery negative pole column, a first aluminum sheet which is welded on the battery positive pole column and is provided with a first hole, and a second aluminum sheet which is welded on the battery negative pole column and is provided with a second hole, the first OT terminal is provided with a first hole, the first OT terminal is provided with a second hole, the first screw penetrates through the first hole and the first OT terminal, the first nut is in threaded connection with the first screw, the second screw penetrates through the second hole and the second OT terminal, the second nut is in threaded connection with the second screw, the first temperature sensor is arranged on the first OT terminal, and the second temperature sensor is arranged on the second OT terminal. The detection equipment is used for determining the contact impedance of the battery; and the detection device determines the position of an abnormal point where an abnormality occurs in the charging and discharging loop of the battery according to the collected temperature value of the first OT terminal, the collected temperature value of the second OT terminal and the obtained contact impedance of the battery.

Description

Technical Field

[0001] The present application relates to the technical field of battery detection, and in particular to a detection system and device for detecting contact impedance and temperature of a battery. Background Art

[0002] CN102879744A provides a method for detecting or monitoring battery parameters such as internal resistance, overvoltage, undervoltage, overtemperature, etc. of the battery.

[0003] During actual battery testing using battery testing equipment, for ease of testing, the battery testing equipment and the battery post are connected manually using bolts to connect the OT terminal to the post or aluminum sheet. However, abnormalities in the charge and discharge circuit, such as poor welding between the aluminum sheet and the post, oxidation of the aluminum sheet, poor contact between the aluminum sheet and the post, human factors such as insufficient tightening of the OT terminal and the aluminum sheet, and vibration, can all lead to severe heating of the battery post and damage to the post and related components in the circuit. Currently, existing technologies lack effective solutions to detect these long-standing abnormalities and their location. Failure to promptly detect these abnormalities can render test data unusable or create the risk of thermal damage to the battery due to overheating. Summary of the Invention

[0004] In order to solve the above technical problems, the present application provides a battery contact impedance and temperature detection system and detection equipment, the detection equipment is used to combine the collected temperature value of the first OT terminal, the collected temperature value of the second OT terminal, the first contact impedance, and the second contact impedance to determine the location of the abnormal point where the abnormality occurs in the battery's charging and discharging circuit, wherein the abnormal point location includes: between the first aluminum sheet and the first OT terminal, between the positive electrode of the battery and the first aluminum sheet, between the first OT terminal and the cable used to connect the power module, between the second aluminum sheet and the second OT terminal, between the negative electrode of the battery and the second aluminum sheet, or between the second OT terminal and the cable used to connect the power module.

[0005] In a first aspect, the present application provides a battery contact impedance and temperature detection system, comprising: A battery positive electrode column, a battery negative electrode column, a first aluminum sheet welded on the battery positive electrode column and having a first hole, a second aluminum sheet welded on the battery negative electrode column and having a second hole, a first screw passing through the first hole and the first OT terminal, a first nut screwed to the first screw, a second screw passing through the second hole and the second OT terminal, a second nut screwed to the second screw, a first temperature sensor provided on the first OT terminal for collecting the temperature value of the first OT terminal, a second temperature sensor provided on the second OT terminal for collecting the temperature value of the second OT terminal, a detection device for determining the contact impedance of the battery including a first connection end, a second connection end, a third connection end, a fourth connection end and a fifth connection end, a Hall current acquisition circuit, and a power module. The battery includes: a battery positive electrode column, a battery negative electrode column; wherein, A first screw passing through the first hole and the first OT terminal is screwed to a first nut so that the first aluminum sheet abuts the first OT terminal. A second screw passing through the second hole and the second OT terminal is screwed to a second nut so that the second aluminum sheet abuts the second OT terminal. The first connection end is respectively connected to the first end of the first OT terminal and the first conductive port of the first aluminum sheet. The first end of the first OT terminal is also connected to the power module via a Hall current acquisition circuit for collecting current. The Hall current acquisition circuit is also connected to the third connection end. The fourth connection end is connected to the first temperature sensor. The second connection end is respectively connected to the second end of the second OT terminal and the second conductive port of the second aluminum sheet. The fifth connection end is connected to the second temperature sensor. The contact impedance of the battery includes: a first contact impedance between a first end of the first OT terminal and a first conductive port of the first aluminum sheet, and a second contact impedance between a second end of the second OT terminal and a second conductive port of the second aluminum sheet; The detection equipment is used to determine the location of an abnormal point in the battery's charge and discharge circuit where an abnormality occurs, based on the collected temperature value of the first OT terminal, the collected temperature value of the second OT terminal, the calculated first contact impedance, and the calculated second contact impedance. The abnormal point locations include: between the first aluminum sheet and the first OT terminal, between the battery's positive electrode post and the first aluminum sheet, between the first OT terminal and the cable used to connect the power module, between the second aluminum sheet and the second OT terminal, between the battery's negative electrode post and the second aluminum sheet, or between the second OT terminal and the cable used to connect the power module; the battery's charge and discharge circuit includes: the battery's positive electrode post, the battery's negative electrode post, the first aluminum sheet, the second aluminum sheet, the first OT terminal, the second OT terminal, and the power module.

[0006] In combination with the first aspect, in an optional embodiment, a Hall current acquisition circuit is provided between the first end of the first OT terminal and the power module to acquire current flowing between the first end of the first OT terminal and the power module; The first connection end of the detection device is respectively connected to the first end of the first OT terminal and the first conductive port of the first aluminum sheet to collect a first voltage flowing through the positive electrode of the battery, and a first contact impedance between the first end of the first OT terminal and the first conductive port of the first aluminum sheet is determined in combination with the collected current flowing between the first end of the first OT terminal and the power module; The second connection end of the detection device is connected to the second end of the second OT terminal and the second conductive port of the second aluminum sheet, respectively, to collect a second voltage flowing through the negative electrode of the battery, and determine a second contact impedance between the second end of the second OT terminal and the second conductive port of the second aluminum sheet in combination with the collected current flowing between the first end of the first OT terminal and the power module; The first temperature sensor arranged on the first OT terminal is connected to the fourth connection end of the detection device to transmit the collected temperature value of the first OT terminal to the detection device, and the second temperature sensor arranged on the second OT terminal is connected to the fifth connection end of the detection device to transmit the collected temperature value of the second OT terminal to the detection device.

[0007] In combination with the first aspect, in an optional embodiment, the detection device is used to obtain the current flowing between the first end of the first OT terminal and the power module, the first contact impedance, the second contact impedance, the collected temperature value of the first OT terminal, and the collected temperature value of the second OT terminal through the first connection end, the second connection end, the third connection end, the fourth connection end and the fifth connection end, and display the current flowing between the first end of the first OT terminal and the power module, the first contact impedance, the second contact impedance, the collected temperature value of the first OT terminal, and the collected temperature value of the second OT terminal through the display screen on the detection device.

[0008] In conjunction with the first aspect, in an optional implementation manner, the detection device is specifically configured to: The temperature value of the first OT terminal collected is used as the first temperature of the positive electrode column of the battery, and the temperature value of the second OT terminal collected is used as the second temperature of the negative electrode column of the battery; Determine whether the first temperature exceeds the preset temperature value. If the first temperature exceeds the preset temperature value, determine that the temperature of the positive electrode of the battery is abnormal. Determine whether the second temperature exceeds the preset temperature value. If the second temperature exceeds the preset temperature value, determine that the temperature of the negative electrode of the battery is abnormal.

[0009] In conjunction with the first aspect, in an optional implementation manner, the detection device is further specifically configured to: The collected temperature value of the first OT terminal is used as the first temperature of the positive electrode column of the battery; When the first temperature exceeds the preset temperature value, it is determined whether the first contact impedance is less than the preset impedance value. If the first contact impedance is greater than the preset impedance value, it is determined that the abnormal point causing the abnormal temperature of the battery positive pole is between the first aluminum sheet and the first OT terminal in the battery's charge and discharge circuit, and the abnormal temperature of the battery positive pole is caused by poor contact between the first aluminum sheet and the first OT terminal.

[0010] In conjunction with the first aspect, in an optional implementation manner, the detection device is further specifically configured to: The collected temperature value of the first OT terminal is used as the first temperature of the positive electrode column of the battery; When the first temperature exceeds the preset temperature value, determine whether the first contact impedance is less than the preset impedance value. If the first contact impedance is less than the preset impedance value, determine that the abnormal point position causing the abnormal temperature of the battery positive pole is between the battery positive pole and the first aluminum sheet in the battery's charge and discharge circuit, and the abnormal temperature of the battery positive pole is caused by poor contact between the battery positive pole and the first aluminum sheet. Alternatively, determine that the abnormal point position causing the abnormal temperature of the battery positive pole is between the first OT terminal in the battery's charge and discharge circuit and the cable used to connect the power module, and the abnormal temperature of the battery positive pole is caused by poor contact between the first OT terminal and the cable used to connect the power module.

[0011] In conjunction with the first aspect, in an optional implementation manner, the detection device is further specifically configured to: The collected temperature value of the second OT terminal is used as the second temperature of the negative electrode of the battery; When the second temperature exceeds the preset temperature value, it is determined whether the second contact impedance is less than the preset impedance value. If the second contact impedance is greater than the preset impedance value, it is determined that the abnormal point causing the abnormal temperature of the battery negative pole is between the second aluminum sheet and the second OT terminal in the battery's charge and discharge circuit, and the abnormal temperature of the battery negative pole is caused by poor contact between the second aluminum sheet and the second OT terminal.

[0012] In conjunction with the first aspect, in an optional implementation manner, the detection device is further specifically configured to: The collected temperature value of the second OT terminal is used as the second temperature of the negative electrode of the battery; When the second temperature exceeds the preset temperature value, it is determined whether the second contact impedance is less than the preset impedance value. If the second contact impedance is less than the preset impedance value, it is determined that the abnormal point causing the abnormal temperature of the battery negative electrode column is between the battery negative electrode column and the second aluminum sheet in the battery charge and discharge circuit, and the abnormal temperature of the battery negative electrode column is caused by poor contact between the battery negative electrode column and the second aluminum sheet, or, It was determined that the abnormal point causing the abnormal temperature of the battery's negative pole was between the second OT terminal in the battery's charge and discharge circuit and the cable used to connect the power module, and that the abnormal temperature of the battery's negative pole was caused by poor contact between the second OT terminal and the cable used to connect the power module.

[0013] In combination with the first aspect, in an optional implementation, the detection device is also connected to the central control machine based on WIFI, Bluetooth or cable to upload the unique code of the battery with abnormal positive pole temperature or abnormal negative pole temperature to the central control machine.

[0014] In conjunction with the first aspect, in an optional implementation manner, the detection device is further configured to: The temperature of the positive electrode column of the battery is periodically collected, the temperature of the negative electrode column of the battery is collected, the current flowing between the first end of the first OT terminal and the power module is collected, the first contact impedance and the second contact impedance are calculated, and the unique code of the battery with abnormal positive electrode column temperature or abnormal negative electrode column temperature is periodically uploaded to the central control machine connected to the detection equipment.

[0015] In a second aspect, the present application provides a device for detecting contact impedance and temperature of a battery, comprising: A first connection terminal, a second connection terminal, a third connection terminal, a fourth connection terminal, a fifth connection terminal, a display screen, and an MCU chip for determining the contact impedance of the battery. The battery includes: a positive battery column and a negative battery column; wherein, The first connection end is respectively connected to the first end of the first OT terminal and the first conductive port of the first aluminum sheet. The first end of the first OT terminal is also connected to the power module via a Hall current acquisition circuit for collecting current. The Hall current acquisition circuit is also connected to the third connection end. The fourth connection end is connected to a first temperature sensor provided on the first OT terminal for collecting the temperature value of the first OT terminal. The second connection end is respectively connected to the second end of the second OT terminal and the second conductive port of the second aluminum sheet. The fifth connection end is connected to a second temperature sensor provided on the second OT terminal for collecting the temperature value of the second OT terminal. A first aluminum sheet is welded to the positive electrode post of the battery and has a first hole formed therein. A first screw passing through the first hole and the first OT terminal is screwed together with a first nut so that the first aluminum sheet abuts the first OT terminal. A second aluminum sheet is welded to the negative electrode post of the battery and has a second hole formed therein. A second screw passing through the second hole and the second OT terminal is screwed together with a second nut so that the second aluminum sheet abuts the second OT terminal. The contact impedance of the battery includes: a first contact impedance between a first end of the first OT terminal and a first conductive port of the first aluminum sheet, and a second contact impedance between a second end of the second OT terminal and a second conductive port of the second aluminum sheet; The MCU chip is used to determine the location of an abnormal point in the battery's charge and discharge circuit where an abnormality occurs by combining the collected temperature value of the first OT terminal, the collected temperature value of the second OT terminal, the first contact impedance, and the second contact impedance. The abnormal point locations include: between the first aluminum sheet and the first OT terminal, between the battery positive electrode post and the first aluminum sheet, between the first OT terminal and the cable used to connect the power module, between the second aluminum sheet and the second OT terminal, between the battery negative electrode post and the second aluminum sheet, or between the second OT terminal and the cable used to connect the power module; the battery's charge and discharge circuit includes: the battery positive electrode post, the battery negative electrode post, the first aluminum sheet, the second aluminum sheet, the first OT terminal, the second OT terminal, and the power module.

[0016] In conjunction with the second aspect, in an optional embodiment, a Hall current acquisition circuit is provided between the first end of the first OT terminal and the power module to acquire current flowing between the first end of the first OT terminal and the power module; The first connection end is respectively connected to the first end of the first OT terminal and the first conductive port of the first aluminum sheet to collect a first voltage flowing through the positive electrode of the battery, and a first contact impedance between the first end of the first OT terminal and the first conductive port of the first aluminum sheet is determined in combination with the collected current flowing between the first end of the first OT terminal and the power module; The second connection end is respectively connected to the second end of the second OT terminal and the second conductive port of the second aluminum sheet to collect a second voltage flowing through the negative electrode of the battery, and a second contact impedance between the second end of the second OT terminal and the second conductive port of the second aluminum sheet is determined in combination with the collected current flowing between the first end of the first OT terminal and the power module; The first temperature sensor provided on the first OT terminal is connected to the fourth connection end to transmit the collected temperature value of the first OT terminal to the MCU chip. The second temperature sensor provided on the second OT terminal is connected to the fifth connection end to transmit the collected temperature value of the second OT terminal to the MCU chip.

[0017] In combination with the second aspect, in an optional embodiment, the display screen is used to display the current flowing between the first end of the first OT terminal and the power module, the first contact impedance, the second contact impedance, the collected temperature value of the first OT terminal, and the collected temperature value of the second OT terminal.

[0018] In conjunction with the second aspect, in an optional implementation manner, the MCU chip is specifically used for: The temperature value of the first OT terminal collected is used as the first temperature of the positive electrode column of the battery, and the temperature value of the second OT terminal collected is used as the second temperature of the negative electrode column of the battery; Determine whether the first temperature exceeds the preset temperature value. If the first temperature exceeds the preset temperature value, determine that the temperature of the positive electrode of the battery is abnormal. Determine whether the second temperature exceeds the preset temperature value. If the second temperature exceeds the preset temperature value, determine that the temperature of the negative electrode of the battery is abnormal.

[0019] In conjunction with the second aspect, in an optional implementation manner, the MCU chip is further specifically configured to: The collected temperature value of the first OT terminal is used as the first temperature of the positive electrode column of the battery; When the first temperature exceeds the preset temperature value, it is determined whether the first contact impedance is less than the preset impedance value. If the first contact impedance is greater than the preset impedance value, it is determined that the abnormal point causing the abnormal temperature of the battery positive pole is between the first aluminum sheet and the first OT terminal in the battery's charge and discharge circuit, and the abnormal temperature of the battery positive pole is caused by poor contact between the first aluminum sheet and the first OT terminal.

[0020] In conjunction with the second aspect, in an optional implementation manner, the MCU chip is further specifically configured to: The collected temperature value of the first OT terminal is used as the first temperature of the positive electrode column of the battery; When the first temperature exceeds the preset temperature value, determine whether the first contact impedance is less than the preset impedance value. If the first contact impedance is less than the preset impedance value, determine that the abnormal point position causing the abnormal temperature of the battery positive pole is between the battery positive pole and the first aluminum sheet in the battery's charge and discharge circuit, and the abnormal temperature of the battery positive pole is caused by poor contact between the battery positive pole and the first aluminum sheet. Alternatively, determine that the abnormal point position causing the abnormal temperature of the battery positive pole is between the first OT terminal in the battery's charge and discharge circuit and the cable used to connect the power module, and the abnormal temperature of the battery positive pole is caused by poor contact between the first OT terminal and the cable used to connect the power module.

[0021] In conjunction with the second aspect, in an optional implementation manner, the MCU chip is further specifically configured to: The collected temperature value of the second OT terminal is used as the second temperature of the negative electrode of the battery; When the second temperature exceeds the preset temperature value, it is determined whether the second contact impedance is less than the preset impedance value. If the second contact impedance is greater than the preset impedance value, it is determined that the abnormal point causing the abnormal temperature of the battery negative pole is between the second aluminum sheet and the second OT terminal in the battery's charge and discharge circuit, and the abnormal temperature of the battery negative pole is caused by poor contact between the second aluminum sheet and the second OT terminal.

[0022] In conjunction with the second aspect, in an optional implementation manner, the MCU chip is further specifically configured to: The collected temperature value of the second OT terminal is used as the second temperature of the negative electrode of the battery; When the second temperature exceeds the preset temperature value, it is determined whether the second contact impedance is less than the preset impedance value. If the second contact impedance is less than the preset impedance value, it is determined that the abnormal point causing the abnormal temperature of the battery negative electrode column is between the battery negative electrode column and the second aluminum sheet in the battery charge and discharge circuit, and the abnormal temperature of the battery negative electrode column is caused by poor contact between the battery negative electrode column and the second aluminum sheet, or, It was determined that the abnormal point causing the abnormal temperature of the battery's negative pole was between the second OT terminal in the battery's charge and discharge circuit and the cable used to connect the power module, and that the abnormal temperature of the battery's negative pole was caused by poor contact between the second OT terminal and the cable used to connect the power module.

[0023] In combination with the second aspect, in an optional implementation, the temperature of the positive electrode column of the battery, the temperature of the negative electrode column of the battery, and the current flowing between the first end of the first OT terminal and the power module are periodically collected through a Hall current collection circuit, and the first contact impedance and the second contact impedance are calculated and obtained through the MCU chip, and the unique code of the battery with abnormal temperature of the positive electrode column or the negative electrode column is periodically uploaded to the central control machine.

[0024] The present application provides a detection system and detection equipment for the contact impedance and temperature of a battery, wherein the detection system includes: a positive electrode post of a battery, a negative electrode post of a battery, a first aluminum sheet welded on the positive electrode post of the battery and having a first hole, a second aluminum sheet welded on the negative electrode post of the battery and having a second hole, a first screw passing through the first hole and a first OT terminal, a first nut screwed to the first screw, a second screw passing through the second hole and the second OT terminal, a second nut screwed to the second screw, a first temperature sensor arranged on the first OT terminal for collecting the temperature value of the first OT terminal, a second temperature sensor arranged on the second OT terminal for collecting the temperature value of the second OT terminal, a detection equipment for determining the contact impedance of the battery including a first connection end, a second connection end, a third connection end, a fourth connection end and a fifth connection end, a Hall current acquisition circuit, and a power module. The battery includes: a positive electrode post of a battery, a negative electrode post of a battery; wherein, A first screw passing through the first hole and the first OT terminal is screwed to a first nut so that the first aluminum sheet abuts the first OT terminal. A second screw passing through the second hole and the second OT terminal is screwed to a second nut so that the second aluminum sheet abuts the second OT terminal. The first connection end is respectively connected to the first end of the first OT terminal and the first conductive port of the first aluminum sheet. The first end of the first OT terminal is also connected to the power module via a Hall current acquisition circuit for collecting current. The Hall current acquisition circuit is also connected to the third connection end. The fourth connection end is connected to the first temperature sensor. The second connection end is respectively connected to the second end of the second OT terminal and the second conductive port of the second aluminum sheet. The fifth connection end is connected to the second temperature sensor. The contact impedance of the battery includes: a first contact impedance between a first end of the first OT terminal and a first conductive port of the first aluminum sheet, and a second contact impedance between a second end of the second OT terminal and a second conductive port of the second aluminum sheet; The detection equipment is used to determine the location of an abnormal point in the battery's charge and discharge circuit where an abnormality occurs, based on the collected temperature value of the first OT terminal, the collected temperature value of the second OT terminal, the first contact impedance, and the second contact impedance. The abnormal point locations include: between the first aluminum sheet and the first OT terminal, between the battery's positive electrode post and the first aluminum sheet, between the first OT terminal and the cable used to connect the power module, between the second aluminum sheet and the second OT terminal, between the battery's negative electrode post and the second aluminum sheet, or between the second OT terminal and the cable used to connect the power module; the battery's charge and discharge circuit includes: the battery's positive electrode post, the battery's negative electrode post, the first aluminum sheet, the second aluminum sheet, the first OT terminal, the second OT terminal, and the power module.

[0025] By using this application, the detection device can combine the collected temperature value of the first OT terminal, the collected temperature value of the second OT terminal, the first contact impedance, and the second contact impedance to determine the location of the abnormal point in the battery's charge and discharge circuit where the abnormality occurs, wherein the abnormal point location includes: between the first aluminum sheet and the first OT terminal, between the battery's positive electrode and the first aluminum sheet, between the first OT terminal and the cable used to connect the power module, between the second aluminum sheet and the second OT terminal, between the battery's negative electrode and the second aluminum sheet, or between the second OT terminal and the cable used to connect the power module. In other words, the detection device can promptly discover abnormalities in the battery's charge and discharge circuit and the location where the abnormality occurs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Figure 1 This is a schematic diagram of a battery contact impedance and temperature detection system provided by the present application; Figure 2This is a schematic diagram of a battery contact impedance and temperature detection device provided by the present application; 10-Detection equipment, 101-First connection end, 102-Second connection end, 103-Third connection end, 104-Fourth connection end, 105-Fifth connection end, 106-MCU chip, 107-Display screen, 20-Battery, 201-Battery positive pole, 202-Battery negative pole, 30-Power module, 40-Hall current acquisition circuit, 401-First temperature sensor, 402-Second temperature sensor, 501-First screw, 502-Second screw, 601-First OT terminal, 602-Second OT terminal, 701-First aluminum sheet, 702-Second aluminum sheet, 801-First nut, 802-Second nut. DETAILED DESCRIPTION

[0027] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0028] It should be noted that the first, second, third, fourth, and fifth in this application are only used to distinguish different connection ends, holes, screws, nuts, aluminum sheets, temperature sensors, OT terminals, contact impedances, conductive ports, etc., and have no other meanings and should not limit the scope of protection of this application.

[0029] See also Figure 1 , is a schematic diagram of a battery contact impedance and temperature detection system provided by the present application, such as Figure 1 Specifically, the detection system may include but is not limited to: The positive electrode column 201 of the battery, the negative electrode column 202 of the battery, the first aluminum sheet 701 welded on the positive electrode column 201 and having a first hole, the second aluminum sheet 702 welded on the negative electrode column 202 and having a second hole, the first hole and the first OT (Output The first screw 501 of the terminal, the first nut 801 screwed to the first screw 501, the second screw 502 passing through the second hole and the second OT terminal 602, the second nut 802 screwed to the second screw 502, the first temperature sensor 401 provided on the first OT terminal 601 for collecting the temperature value of the first OT terminal 601, the second temperature sensor 402 provided on the second OT terminal 602 for collecting the temperature value of the second OT terminal 602, the detection device 10 for determining the contact impedance of the battery 20 including the first connection end 101, the second connection end 102, the third connection end 103, the fourth connection end 104 and the fifth connection end 105, the Hall current acquisition circuit 40, and the power module 30 for charging or discharging the battery 20. The first screw 501 passing through the first hole and the first OT terminal 601 is screwed together with the first nut 801 so that the first aluminum sheet 701 abuts against the first OT terminal 601. The second screw 502 passing through the second hole and the second OT terminal 602 is screwed together with the second nut 802 so that the second aluminum sheet 702 abuts against the second OT terminal 602. The first connection end 101 is respectively connected to the first end of the first OT terminal 601 and the first conductive port of the first aluminum sheet 701. The first end of the first OT terminal 601 is also connected to the power module 30 via the Hall current acquisition circuit 40 for current acquisition. The Hall current acquisition circuit 40 is also connected to the third connection end 103. The fourth connection end 104 is connected to the first temperature sensor 401. The second connection end 102 is respectively connected to the second end of the second OT terminal 602 and the second conductive port of the second aluminum sheet 702. The fifth connection end 105 is connected to the second temperature sensor 402. The contact impedance of the battery 20 includes: a first contact impedance between the first end of the first OT terminal 601 and the first conductive port of the first aluminum sheet 701, and a second contact impedance between the second end of the second OT terminal 602 and the second conductive port of the second aluminum sheet 702; wherein the first connection end 101 is respectively connected to the first end of the first OT terminal 601 and the first conductive port of the first aluminum sheet 701; the second connection end 102 is respectively connected to the second end of the second OT terminal 602 and the second conductive port of the second aluminum sheet 702; The detection device 10 is used to determine the abnormal point location where the abnormality occurs in the charge and discharge circuit of the battery 20 in combination with the collected temperature value of the first OT terminal 601, the collected temperature value of the second OT terminal 602, the calculated first contact impedance, and the calculated second contact impedance. The abnormal point location includes: between the first aluminum sheet 701 and the first OT terminal 601, between the battery positive electrode column 201 and the first aluminum sheet 701, between the first OT terminal 601 and the cable for connecting the power module 30, between the second aluminum sheet 702 and the second OT terminal 602, between the battery negative electrode column 202 and the second aluminum sheet 702, or between the second OT terminal 602 and the cable for connecting the power module 30; wherein, The charge and discharge circuit of the battery 20 may include but is not limited to: a battery positive electrode column 201, a battery negative electrode column 202, a first aluminum sheet 701, a second aluminum sheet 702, a first OT terminal 601, a second OT terminal 602, a power module 30, a Hall current acquisition circuit 40, a first screw 501, a second screw 502, a first nut 801, a second nut 802, and connecting cables or lines between the various components in the charge and discharge circuit of the battery 20.

[0030] It should be noted that the first OT terminal 601 and the second OT terminal 602 belong to different OT terminals respectively; the first aluminum sheet 701 and the second aluminum sheet 702 belong to different aluminum sheets respectively; the first screw 501 and the second screw 502 belong to different screws respectively; the first nut 801 and the second nut 802 belong to different nuts respectively; the first connection end 101, the second connection end 102, the third connection end 103, the fourth connection end 104, and the fifth connection end 105 belong to different connection ends of the detection device 10 respectively; the first temperature sensor 401 and the second temperature sensor 402 belong to different temperature sensors.

[0031] Preferably, the Hall current collection circuit 40 is provided between the first end of the first OT terminal 601 and the power module 30 to collect the current flowing between the first end of the first OT terminal 601 and the power module 30; The first connection end 101 of the detection device 10 is connected to the first end of the first OT terminal 601 and the first conductive port of the first aluminum sheet 701, respectively, to collect a first voltage flowing through the battery positive electrode 201. The detection device 10 determines a first contact impedance between the first end of the first OT terminal 601 and the first conductive port of the first aluminum sheet 701 based on the collected current flowing between the first end of the first OT terminal 601 and the power module 30. The second connection end 102 of the detection device 10 is connected to the second end of the second OT terminal 602 and the second conductive port of the second aluminum sheet 702, respectively, to collect a second voltage flowing through the negative battery column 202. The detection device 10 determines a second contact impedance between the second end of the second OT terminal 602 and the second conductive port of the second aluminum sheet 702 based on the collected current flowing between the first end of the first OT terminal 601 and the power module 30. The first temperature sensor 401 provided on the first OT terminal 601 is connected to the fourth connection terminal 104 of the detection device 10 to transmit the collected temperature value of the first OT terminal 601 to the detection device 10. The second temperature sensor 402 provided on the second OT terminal 602 is connected to the fifth connection terminal 105 of the detection device 10 to transmit the collected temperature value of the second OT terminal 602 to the detection device 10 .

[0032] It should be noted that the first conductive port and the second conductive port are different conductive ports; the first voltage is used to represent the voltage of the battery positive electrode column 201, and the second voltage is used to represent the voltage of the battery negative electrode column 202.

[0033] Preferably, the detection device 10 is used to obtain the current flowing between the first end of the first OT terminal 601 and the power module 30, the first contact impedance, the second contact impedance, the collected temperature value of the first OT terminal 601, and the collected temperature value of the second OT terminal 602 through the first connection end 101, the second connection end 102, the third connection end 103, the fourth connection end 104 and the fifth connection end 105, and display the current flowing between the first end of the first OT terminal 601 and the power module 30, the first contact impedance, the second contact impedance, the collected temperature value of the first OT terminal 601, and the collected temperature value of the second OT terminal 602 through the display screen 107 on the detection device 10.

[0034] It should be noted that the first contact impedance is the impedance presented by the contact portion between the first end of the first OT terminal 601 and the first conductive port of the first aluminum sheet 701, and the second contact impedance is the impedance presented by the contact portion between the second end of the second OT terminal 602 and the second conductive port of the second aluminum sheet 702.

[0035] Preferably, the detection device 10 is specifically used for: The temperature value of the first OT terminal 601 collected is used as the first temperature of the battery positive electrode column 201, and the temperature value of the second OT terminal 602 collected is used as the second temperature of the battery negative electrode column 202; wherein, the first temperature is used to characterize the temperature of the battery positive electrode column 201, and the second temperature is used to characterize the temperature of the battery negative electrode column 202.

[0036] Determine whether the first temperature exceeds the preset temperature value. If the first temperature exceeds the preset temperature value, it is determined that the temperature of the battery positive electrode column 201 is abnormal. Determine whether the second temperature exceeds the preset temperature value. If the second temperature exceeds the preset temperature value, it is determined that the temperature of the battery negative electrode column 202 is abnormal. The preset temperature value can be set to multiple different values ​​according to user needs.

[0037] Preferably, the detection device 10 is further specifically used for: The collected temperature value of the first OT terminal 601 is used as the first temperature of the battery positive electrode column 201; When the first temperature exceeds the temperature preset value, it is determined whether the first contact impedance is less than the impedance preset value. If the first contact impedance is greater than the impedance preset value, it is determined that the abnormal point causing the abnormal temperature of the battery positive column 201 is between the first aluminum sheet 701 and the first OT terminal 601 in the charge and discharge circuit of the battery 20, and the abnormal temperature of the battery positive column 201 is caused by poor contact between the first aluminum sheet 701 and the first OT terminal 601; wherein, the impedance preset value can be set to multiple different values ​​according to user needs.

[0038] Preferably, the detection device 10 is further specifically used for: The collected temperature value of the first OT terminal 601 is used as the first temperature of the battery positive electrode column 201; When the first temperature exceeds the preset temperature value, it is determined whether the first contact impedance is less than the preset impedance value. If the first contact impedance is less than the preset impedance value, it is determined that the abnormal point position causing the abnormal temperature of the battery positive electrode column 201 is between the battery positive electrode column 201 and the first aluminum sheet 701 in the charge and discharge circuit of the battery 20, and the abnormal temperature of the battery positive electrode column 201 is due to poor contact between the battery positive electrode column 201 and the first aluminum sheet 701, or it is determined that the abnormal point position causing the abnormal temperature of the battery positive electrode column 201 is between the first OT terminal 601 in the charge and discharge circuit of the battery 20 and the cable used to connect the power module 30, and the abnormal temperature of the battery positive electrode column 201 is due to poor contact between the first OT terminal 601 and the cable used to connect the power module 30.

[0039] Preferably, the detection device 10 is further specifically used for: The collected temperature value of the second OT terminal 602 is used as the second temperature of the battery negative electrode column 202; When the second temperature exceeds the preset temperature value, it is determined whether the second contact impedance is less than the preset impedance value. If the second contact impedance is greater than the preset impedance value, it is determined that the abnormal point causing the abnormal temperature of the battery negative pole 202 is between the second aluminum sheet 702 and the second OT terminal 602 in the charge and discharge circuit of the battery 20, and the abnormal temperature of the battery negative pole 202 is caused by poor contact between the second aluminum sheet 702 and the second OT terminal 602.

[0040] Preferably, the detection device 10 is further specifically used for: The collected temperature value of the second OT terminal 602 is used as the second temperature of the battery negative electrode column 202; When the second temperature exceeds the preset temperature value, it is determined whether the second contact impedance is less than the preset impedance value. If the second contact impedance is less than the preset impedance value, it is determined that the abnormal point causing the abnormal temperature of the battery negative electrode post 202 is between the battery negative electrode post 202 and the second aluminum sheet 702 in the charge and discharge circuit of the battery 20, and the abnormal temperature of the battery negative electrode post 202 is caused by poor contact between the battery negative electrode post 202 and the second aluminum sheet 702, or, It was determined that the abnormal point causing the abnormal temperature of the battery negative column 202 was between the second OT terminal 602 in the charging and discharging circuit of the battery 20 and the cable used to connect the power module 30, and the abnormal temperature of the battery negative column 202 was caused by poor contact between the second OT terminal 602 and the cable used to connect the power module 30.

[0041] Preferably, the detection device 10 is further connected to the central control machine via WIFI, Bluetooth, or a cable to upload the unique code of the battery 20 with abnormal temperature of the battery positive pole 201 or abnormal temperature of the battery negative pole 202 to the central control machine. The unique code of the battery 20 is the unique identity code of the battery 20, and is used by the central control machine to confirm that the battery 20 with the same unique code in the detection system has abnormal temperature of the battery positive pole 201 or abnormal temperature of the battery negative pole 202, so that the user can intuitively identify the abnormal battery with abnormal temperature of the positive pole or abnormal temperature of the negative pole in the detection system through the central control machine or the detection device 10.

[0042] Preferably, the detection device 10 is further used for: The temperature of the battery positive electrode column 201 is periodically collected, the temperature of the battery negative electrode column 202 is collected, the current flowing between the first end of the first OT terminal 601 and the power module 30 is collected, the first contact impedance is calculated, and the second contact impedance is obtained by calculation. The unique code of the battery 20 with abnormal temperature of the battery positive electrode column 201 or abnormal temperature of the battery negative electrode column 202 is periodically uploaded to the central control machine connected to the detection equipment 10; thereby, the central control machine can promptly identify abnormal batteries with abnormal positive electrode column temperature or abnormal negative electrode column temperature in the detection system.

[0043] Preferably, the detection system includes a first battery, a second battery, a first detection device for detecting the first battery, and a second detection device for detecting the second battery; wherein the first battery and the second battery are connected to the central control machine through the first detection device and the second detection device respectively, when the temperature of the first battery positive pole of the first battery or the temperature of the first battery negative pole of the first battery is abnormal, the first detection device uploads the unique code of the first battery to the central control machine connected to the first detection device, and when the temperature of the second battery positive pole of the second battery or the temperature of the second battery negative pole of the second battery is abnormal, the second detection device uploads the unique code of the second battery to the central control machine connected to the second detection device, so that the central control machine can confirm the abnormal battery with abnormal positive pole temperature or abnormal negative pole temperature in the detection system.

[0044] The present application provides a device for detecting contact impedance and temperature of a battery. The detection device 10 and the battery 20 are taken as an example. Figure 2 As shown, specifically, the battery 20 includes: a battery positive column 201, a battery negative column 202, and the detection device 10 may include but is not limited to: A first connection terminal 101, a second connection terminal 102, a third connection terminal 103, a fourth connection terminal 104, a fifth connection terminal 105, a display screen 107, and an MCU (Micro controller unit) chip 106 for determining the contact impedance of the battery 20; wherein, The first connection end 101 is respectively connected to the first end of the first OT terminal 601 and the first conductive port of the first aluminum sheet 701. The first end of the first OT terminal 601 is also connected to the power module 30 via the Hall current acquisition circuit 40 for collecting current. The Hall current acquisition circuit 40 is also connected to the third connection end 103. The fourth connection end 104 is connected to the first temperature sensor 401 provided on the first OT terminal 601 for collecting the temperature value of the first OT terminal 601. The second connection end 102 is respectively connected to the second end of the second OT terminal 602 and the second conductive port of the second aluminum sheet 702. The fifth connection end 105 is connected to the second temperature sensor 402 provided on the second OT terminal 602 for collecting the temperature value of the second OT terminal 602. The first aluminum sheet 701 is welded to the battery positive electrode column 201 and has a first hole formed therein. The first screw 501 passing through the first hole and the first OT terminal 601 is screwed together with the first nut 801 so that the first aluminum sheet 701 abuts against the first OT terminal 601. The second aluminum sheet 702 is welded to the battery negative electrode column 202 and has a second hole formed therein. The second screw 502 passing through the second hole and the second OT terminal 602 is screwed together with the second nut 802 so that the second aluminum sheet 702 abuts against the second OT terminal 602. The contact impedance of the battery 20 may include but is not limited to: a first contact impedance between the first end of the first OT terminal 601 and the first conductive port of the first aluminum sheet 701, and a second contact impedance between the second end of the second OT terminal 602 and the second conductive port of the second aluminum sheet 702; wherein the first connection end 101 is respectively connected to the first end of the first OT terminal 601 and the first conductive port of the first aluminum sheet 701; the second connection end 102 is respectively connected to the second end of the second OT terminal 602 and the second conductive port of the second aluminum sheet 702; The MCU chip 106 is used to determine the abnormal point position of the abnormality in the charge and discharge circuit of the battery 20 in combination with the collected temperature value of the first OT terminal 601, the collected temperature value of the second OT terminal 602, the calculated first contact impedance, and the calculated second contact impedance. The abnormal point position includes: between the first aluminum sheet 701 and the first OT terminal 601, between the battery positive electrode 201 and the first aluminum sheet 701, between the first OT terminal 601 and the cable for connecting the power module 30, between the second aluminum sheet 702 and the second OT terminal 602, and between the battery negative electrode 202 and the second Between the aluminum sheets 702, or between the second OT terminal 602 and the cable used to connect the power module 30 for charging or discharging the battery 20; the charging and discharging circuit of the battery 20 may include but is not limited to: the battery positive electrode 201, the battery negative electrode 202, the first aluminum sheet 701, the second aluminum sheet 702, the first OT terminal 601, the second OT terminal 602, the power module 30, the Hall current acquisition circuit 40, the first screw 501, the second screw 502, the first nut 801, the second nut 802, and the connecting cables or lines between the various components in the charging and discharging circuit of the battery 20.

[0045] Preferably, the Hall current collection circuit 40 is provided between the first end of the first OT terminal 601 and the power module 30 to collect the current flowing between the first end of the first OT terminal 601 and the power module 30; The first connection end 101 is connected to the first end of the first OT terminal 601 and the first conductive port of the first aluminum sheet 701, respectively, to collect a first voltage flowing through the battery positive electrode 201, and determine a first contact impedance between the first end of the first OT terminal 601 and the first conductive port of the first aluminum sheet 701 in combination with the collected current flowing between the first end of the first OT terminal 601 and the power module 30; The second connection end 102 is connected to the second end of the second OT terminal 602 and the second conductive port of the second aluminum sheet 702, respectively, to collect a second voltage flowing through the negative battery column 202, and determine a second contact impedance between the second end of the second OT terminal 602 and the second conductive port of the second aluminum sheet 702 in combination with the collected current flowing between the first end of the first OT terminal 601 and the power module 30; The first temperature sensor 401 provided on the first OT terminal 601 is connected to the fourth connection end 104 to transmit the collected temperature value of the first OT terminal 601 to the MCU chip 106; The second temperature sensor 402 disposed on the second OT terminal 602 is connected to the fifth connection end 105 to transmit the collected temperature value of the second OT terminal 602 to the MCU chip 106 .

[0046] Preferably, the first connection end 101, the second connection end 102, the third connection end 103, the fourth connection end 104 and the fifth connection end 105 can be used to obtain the current flowing between the first end of the first OT terminal 601 and the power module 30, the first contact impedance, the second contact impedance, the collected temperature value of the first OT terminal 601, and the collected temperature value of the second OT terminal 602, and the display screen 107 can be used to display the current flowing between the first end of the first OT terminal 601 and the power module 30, the first contact impedance, the second contact impedance, the collected temperature value of the first OT terminal 601, and the collected temperature value of the second OT terminal 602.

[0047] Preferably, the MCU chip 106 is specifically used for: The collected temperature value of the first OT terminal 601 is used as the first temperature of the battery positive electrode column 201, and the collected temperature value of the second OT terminal 602 is used as the second temperature of the battery negative electrode column 202; Determine whether the first temperature exceeds the preset temperature value. If the first temperature exceeds the preset temperature value, it is determined that the temperature of the battery positive column 201 is abnormal. Determine whether the second temperature exceeds the preset temperature value. If the second temperature exceeds the preset temperature value, it is determined that the temperature of the battery negative column 202 is abnormal.

[0048] Preferably, the MCU chip 106 is further specifically used for: The collected temperature value of the first OT terminal 601 is used as the first temperature of the battery positive electrode column 201; When the first temperature exceeds the preset temperature value, it is determined whether the first contact impedance is less than the preset impedance value. If the first contact impedance is greater than the preset impedance value, it is determined that the abnormal point causing the abnormal temperature of the battery positive column 201 is between the first aluminum sheet 701 and the first OT terminal 601 in the charge and discharge circuit of the battery 20, and the abnormal temperature of the battery positive column 201 is due to poor contact between the first aluminum sheet 701 and the first OT terminal 601.

[0049] Preferably, the MCU chip 106 is further specifically used for: The collected temperature value of the first OT terminal 601 is used as the first temperature of the battery positive electrode column 201; When the first temperature exceeds the preset temperature value, it is determined whether the first contact impedance is less than the preset impedance value. If the first contact impedance is less than the preset impedance value, it is determined that the abnormal point position causing the abnormal temperature of the battery positive electrode column 201 is between the battery positive electrode column 201 and the first aluminum sheet 701 in the charge and discharge circuit of the battery 20, and the abnormal temperature of the battery positive electrode column 201 is due to poor contact between the battery positive electrode column 201 and the first aluminum sheet 701, or it is determined that the abnormal point position causing the abnormal temperature of the battery positive electrode column 201 is between the first OT terminal 601 in the charge and discharge circuit of the battery 20 and the cable used to connect the power module 30, and the abnormal temperature of the battery positive electrode column 201 is due to poor contact between the first OT terminal 601 and the cable used to connect the power module 30.

[0050] Preferably, the MCU chip 106 is further specifically used for: The collected temperature value of the second OT terminal 602 is used as the second temperature of the battery negative electrode column 202; When the second temperature exceeds the preset temperature value, it is determined whether the second contact impedance is less than the preset impedance value. If the second contact impedance is greater than the preset impedance value, it is determined that the abnormal point causing the abnormal temperature of the battery negative pole 202 is between the second aluminum sheet 702 and the second OT terminal 602 in the charge and discharge circuit of the battery 20, and the abnormal temperature of the battery negative pole 202 is caused by poor contact between the second aluminum sheet 702 and the second OT terminal 602.

[0051] Preferably, the MCU chip 106 is further specifically used for: The collected temperature value of the second OT terminal 602 is used as the second temperature of the battery negative electrode column 202; When the second temperature exceeds the preset temperature value, it is determined whether the second contact impedance is less than the preset impedance value. If the second contact impedance is less than the preset impedance value, it is determined that the abnormal point causing the abnormal temperature of the battery negative electrode post 202 is between the battery negative electrode post 202 and the second aluminum sheet 702 in the charge and discharge circuit of the battery 20, and the abnormal temperature of the battery negative electrode post 202 is caused by poor contact between the battery negative electrode post 202 and the second aluminum sheet 702, or, It was determined that the abnormal point causing the abnormal temperature of the battery negative column 202 was between the second OT terminal 602 in the charging and discharging circuit of the battery 20 and the cable used to connect the power module 30, and the abnormal temperature of the battery negative column 202 was caused by poor contact between the second OT terminal 602 and the cable used to connect the power module 30.

[0052] Preferably, the temperature of the battery positive column 201, the temperature of the battery negative column 202, and the current flowing between the first end of the first OT terminal 601 and the power module 30 are periodically collected through the Hall current collection circuit 40, and the first contact impedance and the second contact impedance are calculated and obtained through the MCU chip 106. The unique code of the battery 20 with abnormal temperature of the battery positive column 201 or abnormal temperature of the battery negative column 202 is periodically uploaded to the central control machine.

[0053] It should be explained that Figure 2 The custom terms or words used in the detection device 10 can be found in Figure 1 The explanation is given in the embodiment and will not be repeated in this embodiment.

[0054] Figures 1 to 2 It is only used to explain the embodiments of the present application and should not limit the scope of protection of the present application.

[0055] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described devices and systems can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0056] The embodiments of the systems and devices described above are merely illustrative. For example, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interfaces, devices, systems or components, or may be an electrical, mechanical or other form of connection.

[0057] Based on this understanding, the technical solution of this application, or the portion that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes a number of instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of this application. The aforementioned storage medium includes: a USB flash drive, a mobile hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, etc., various media that can store program code.

[0058] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present application, and such modifications or substitutions should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A battery contact impedance and temperature detection system, characterized in that: include: A battery positive electrode column (201), a battery negative electrode column (202), a first aluminum sheet (701) welded on the battery positive electrode column (201) and having a first hole, a second aluminum sheet (702) welded on the battery negative electrode column (202) and having a second hole, a first screw (501) passing through the first hole and the first OT terminal (601), a first nut (801) screwed to the first screw (501), a second screw (502) passing through the second hole and the second OT terminal (602), a second nut (802) screwed to the second screw (502), and a device for collecting the first O A first temperature sensor (401) for measuring the temperature value of a T terminal (601), a second temperature sensor (402) provided on a second OT terminal (602) for collecting the temperature value of the second OT terminal (602), a detection device (10) for determining the contact impedance of a battery (20) comprising a first connection terminal (101), a second connection terminal (102), a third connection terminal (103), a fourth connection terminal (104) and a fifth connection terminal (105), a Hall current acquisition circuit (40), and a power module (30), wherein the battery (20) comprises: a battery positive electrode column (201), a battery negative electrode column (202); wherein, A first screw rod (501) passing through the first hole and the first OT terminal (601) is screwed to a first nut (801) so that the first aluminum sheet (701) abuts against the first OT terminal (601); a second screw rod (502) passing through the second hole and the second OT terminal (602) is screwed to a second nut (802) so that the second aluminum sheet (702) abuts against the second OT terminal (602); The first connection end (101) is respectively connected to the first end of the first OT terminal (601) and the first conductive port of the first aluminum sheet (701); the first end of the first OT terminal (601) is also connected to the power module (30) via a Hall current acquisition circuit (40) for collecting current; the Hall current acquisition circuit (40) is also connected to the third connection end (103); the fourth connection end (104) is connected to the first temperature sensor (401); the second connection end (102) is respectively connected to the second end of the second OT terminal (602) and the second conductive port of the second aluminum sheet (702); and the fifth connection end (105) is connected to the second temperature sensor (402); The contact impedance of the battery (20) includes: a first contact impedance between a first end of the first OT terminal (601) and a first conductive port of the first aluminum sheet (701), and a second contact impedance between a second end of the second OT terminal (602) and a second conductive port of the second aluminum sheet (702); The detection device (10) is used to determine the abnormal point position of the abnormality in the charge and discharge circuit of the battery (20) by combining the collected temperature value of the first OT terminal (601), the collected temperature value of the second OT terminal (602), the first contact impedance, and the second contact impedance, wherein the abnormal point position includes: between the first aluminum sheet (701) and the first OT terminal (601), between the battery positive pole (201) and the first aluminum sheet (701), between the first OT terminal (601) and the line for connecting the power module (30), and between the first OT terminal (601) and the line for connecting the power module (30). The charging and discharging circuit of the battery (20) comprises: a positive electrode column (201), a negative electrode column (202), a first aluminum sheet (701), a second aluminum sheet (702), a first OT terminal (601), a second OT terminal (602), and a power module (30).

2. The battery contact impedance and temperature detection system according to claim 1, wherein: The Hall current collection circuit (40) is provided between the first end of the first OT terminal (601) and the power module (30) to collect the current flowing between the first end of the first OT terminal (601) and the power module (30); The first connection end (101) of the detection device (10) is connected to the first end of the first OT terminal (601) and the first conductive port of the first aluminum sheet (701) respectively to collect a first voltage flowing through the positive electrode column (201) of the battery, and a first contact impedance between the first end of the first OT terminal (601) and the first conductive port of the first aluminum sheet (701) is determined in combination with the collected current flowing between the first end of the first OT terminal (601) and the power module (30); The second connection end (102) of the detection device (10) is connected to the second end of the second OT terminal (602) and the second conductive port of the second aluminum sheet (702) respectively, so as to collect a second voltage flowing through the negative electrode column (202) of the battery, and determine a second contact impedance between the second end of the second OT terminal (602) and the second conductive port of the second aluminum sheet (702) in combination with the collected current flowing between the first end of the first OT terminal (601) and the power module (30); A first temperature sensor (401) provided on the first OT terminal (601) is connected to the fourth connection terminal (104) of the detection device (10) to transmit the collected temperature value of the first OT terminal (601) to the detection device (10), and a second temperature sensor (402) provided on the second OT terminal (602) is connected to the fifth connection terminal (105) of the detection device (10) to transmit the collected temperature value of the second OT terminal (602) to the detection device (10).

3. The battery contact impedance and temperature detection system according to claim 2, wherein: The detection device (10) is used to obtain the current flowing between the first end of the first OT terminal (601) and the power module (30), the first contact impedance, the second contact impedance, the collected temperature value of the first OT terminal (601), and the collected temperature value of the second OT terminal (602) through the first connection end (101), the second connection end (102), the third connection end (103), the fourth connection end (104), and the fifth connection end (105), and display the current flowing between the first end of the first OT terminal (601) and the power module (30), the first contact impedance, the second contact impedance, the collected temperature value of the first OT terminal (601), and the collected temperature value of the second OT terminal (602) through the display screen (107) on the detection device (10).

4. The battery contact impedance and temperature detection system according to claim 2, wherein: The detection device (10) is specifically used for: The temperature value of the first OT terminal (601) collected is used as the first temperature of the battery positive pole (201), and the temperature value of the second OT terminal (602) collected is used as the second temperature of the battery negative pole (202); It is determined whether the first temperature exceeds a preset temperature value. If the first temperature exceeds the preset temperature value, it is determined that the temperature of the battery positive pole (201) is abnormal. It is determined whether the second temperature exceeds the preset temperature value. If the second temperature exceeds the preset temperature value, it is determined that the temperature of the battery negative pole (202) is abnormal.

5. The battery contact impedance and temperature detection system according to claim 2, wherein: The detection device (10) is also specifically used for: Using the collected temperature value of the first OT terminal (601) as the first temperature of the battery positive electrode column (201); When the first temperature exceeds a preset temperature value, it is determined whether the first contact impedance is less than the preset impedance value. If the first contact impedance is greater than the preset impedance value, it is determined that the abnormal point causing the abnormal temperature of the battery positive pole (201) is between the first aluminum sheet (701) and the first OT terminal (601) in the charge and discharge circuit of the battery (20), and the abnormal temperature of the battery positive pole (201) is caused by poor contact between the first aluminum sheet (701) and the first OT terminal (601).

6. The battery contact impedance and temperature detection system according to claim 2, wherein: The detection device (10) is also specifically used for: Using the collected temperature value of the first OT terminal (601) as the first temperature of the battery positive electrode column (201); When the first temperature exceeds the preset temperature value, it is determined whether the first contact impedance is less than the preset impedance value. If the first contact impedance is less than the preset impedance value, it is determined that the abnormal point position causing the abnormal temperature of the battery positive electrode column (201) is between the battery positive electrode column (201) and the first aluminum sheet (701) in the charge and discharge circuit of the battery (20), and the abnormal temperature of the battery positive electrode column (201) is caused by poor contact between the battery positive electrode column (201) and the first aluminum sheet (701). Alternatively, it is determined that the abnormal point position causing the abnormal temperature of the battery positive electrode column (201) is between the first OT terminal (601) and the cable for connecting the power module (30) in the charge and discharge circuit of the battery (20), and the abnormal temperature of the battery positive electrode column (201) is caused by poor contact between the first OT terminal (601) and the cable for connecting the power module (30).

7. The battery contact impedance and temperature detection system according to claim 2, wherein: The detection device (10) is also specifically used for: Using the collected temperature value of the second OT terminal (602) as the second temperature of the battery negative electrode column (202); When the second temperature exceeds the preset temperature value, it is determined whether the second contact impedance is less than the preset impedance value. If the second contact impedance is greater than the preset impedance value, it is determined that the abnormal point position causing the abnormal temperature of the battery negative pole (202) is between the second aluminum sheet (702) and the second OT terminal (602) in the charge and discharge circuit of the battery (20), and the abnormal temperature of the battery negative pole (202) is caused by poor contact between the second aluminum sheet (702) and the second OT terminal (602).

8. The battery contact impedance and temperature detection system according to claim 2, wherein: The detection device (10) is also specifically used for: Using the collected temperature value of the second OT terminal (602) as the second temperature of the battery negative electrode column (202); When the second temperature exceeds the preset temperature value, it is determined whether the second contact impedance is less than the preset impedance value. If the second contact impedance is less than the preset impedance value, it is determined that the abnormal point causing the abnormal temperature of the battery negative electrode column (202) is between the battery negative electrode column (202) and the second aluminum sheet (702) in the charge and discharge circuit of the battery (20), and the abnormal temperature of the battery negative electrode column (202) is caused by poor contact between the battery negative electrode column (202) and the second aluminum sheet (702), or, It is determined that the abnormal point location causing the abnormal temperature of the battery negative pole (202) is between the second OT terminal (602) in the charge and discharge circuit of the battery (20) and the cable for connecting to the power module (30), and the abnormal temperature of the battery negative pole (202) is caused by poor contact between the second OT terminal (602) and the cable for connecting to the power module (30).

9. The battery contact impedance and temperature detection system according to claim 2, wherein: The detection device (10) is also connected to the central control machine based on WIFI, Bluetooth or cable to upload the unique code of the battery (20) with abnormal temperature of the battery positive pole (201) or abnormal temperature of the battery negative pole (202) to the central control machine.

10. The battery contact impedance and temperature detection system according to claim 2, wherein: The detection device (10) is also used for: The temperature of the battery positive pole (201) and the temperature of the battery negative pole (202) are periodically collected, and the current flowing between the first end of the first OT terminal (601) and the power module (30) is collected, a first contact impedance is calculated, and a second contact impedance is calculated, and the unique code of the battery (20) with abnormal temperature of the battery positive pole (201) or abnormal temperature of the battery negative pole (202) is periodically uploaded to a central control machine connected to the detection device (10).

11. A device for detecting contact impedance and temperature of a battery, characterized in that: include: A first connection terminal (101), a second connection terminal (102), a third connection terminal (103), a fourth connection terminal (104), a fifth connection terminal (105), a display screen (107), and an MCU chip (106) for determining the contact impedance of a battery (20), wherein the battery (20) includes: a battery positive electrode column (201), a battery negative electrode column (202); wherein, The first connection end (101) is respectively connected to the first end of the first OT terminal (601) and the first conductive port of the first aluminum sheet (701); the first end of the first OT terminal (601) is also connected to the power module (30) via a Hall current acquisition circuit (40) for collecting current; the Hall current acquisition circuit (40) is also connected to the third connection end (103); the fourth connection end (104) is connected to a first temperature sensor (401) provided on the first OT terminal (601) for collecting the temperature value of the first OT terminal (601); the second connection end (102) is respectively connected to the second end of the second OT terminal (602) and the second conductive port of the second aluminum sheet (702); the fifth connection end (105) is connected to a second temperature sensor (402) provided on the second OT terminal (602) for collecting the temperature value of the second OT terminal (602); The first aluminum sheet (701) is welded to the battery positive electrode column (201) and is provided with a first hole, and a first screw (501) passing through the first hole and the first OT terminal (601) is screwed to the first nut (801), so that the first aluminum sheet (701) and the first OT terminal (601) are in contact with each other; the second aluminum sheet (702) is welded to the battery negative electrode column (202) and is provided with a second hole, and a second screw (502) passing through the second hole and the second OT terminal (602) is screwed to the second nut (802), so that the second aluminum sheet (702) and the second OT terminal (602) are in contact with each other; The contact impedance of the battery (20) includes: a first contact impedance between a first end of the first OT terminal (601) and a first conductive port of the first aluminum sheet (701), and a second contact impedance between a second end of the second OT terminal (602) and a second conductive port of the second aluminum sheet (702); The MCU chip (106) is used to determine the abnormal point position of the abnormality in the charge and discharge circuit of the battery (20) by combining the collected temperature value of the first OT terminal (601), the collected temperature value of the second OT terminal (602), the first contact impedance, and the second contact impedance. The abnormal point position includes: between the first aluminum sheet (701) and the first OT terminal (601), between the battery positive pole (201) and the first aluminum sheet (701), between the first OT terminal (601) and the terminal for connecting the power module (30). Between the cables, between the second aluminum sheet (702) and the second OT terminal (602), between the battery negative pole (202) and the second aluminum sheet (702), or between the second OT terminal (602) and the cable for connecting the power module (30); the charge and discharge circuit of the battery (20) includes: the battery positive pole (201), the battery negative pole (202), the first aluminum sheet (701), the second aluminum sheet (702), the first OT terminal (601), the second OT terminal (602) and the power module (30).

12. The device for detecting contact impedance and temperature of a battery according to claim 11, wherein: The Hall current collection circuit (40) is provided between the first end of the first OT terminal (601) and the power module (30) to collect the current flowing between the first end of the first OT terminal (601) and the power module (30); The first connection end (101) is respectively connected to the first end of the first OT terminal (601) and the first conductive port of the first aluminum sheet (701) to collect a first voltage flowing through the battery positive electrode (201), and a first contact impedance between the first end of the first OT terminal (601) and the first conductive port of the first aluminum sheet (701) is determined in combination with the collected current flowing between the first end of the first OT terminal (601) and the power module (30); The second connection end (102) is connected to the second end of the second OT terminal (602) and the second conductive port of the second aluminum sheet (702) respectively, so as to collect a second voltage flowing through the negative electrode column (202) of the battery, and determine a second contact impedance between the second end of the second OT terminal (602) and the second conductive port of the second aluminum sheet (702) in combination with the collected current flowing between the first end of the first OT terminal (601) and the power module (30); A first temperature sensor (401) provided on the first OT terminal (601) is connected to the fourth connection terminal (104) to transmit the collected temperature value of the first OT terminal (601) to the MCU chip (106). The second temperature sensor (402) provided on the second OT terminal (602) is connected to the fifth connection end (105) to transmit the collected temperature value of the second OT terminal (602) to the MCU chip (106).

13. The device for detecting contact impedance and temperature of a battery according to claim 11, wherein: The display screen (107) is used to display the current flowing between the first end of the first OT terminal (601) and the power module (30), the first contact impedance, the second contact impedance, the collected temperature value of the first OT terminal (601), and the collected temperature value of the second OT terminal (602).

14. The device for detecting contact impedance and temperature of a battery according to claim 11, wherein: The MCU chip (106) is specifically used for: The temperature value of the first OT terminal (601) collected is used as the first temperature of the battery positive pole (201), and the temperature value of the second OT terminal (602) collected is used as the second temperature of the battery negative pole (202); It is determined whether the first temperature exceeds a preset temperature value. If the first temperature exceeds the preset temperature value, it is determined that the temperature of the battery positive pole (201) is abnormal. It is determined whether the second temperature exceeds the preset temperature value. If the second temperature exceeds the preset temperature value, it is determined that the temperature of the battery negative pole (202) is abnormal.

15. The device for detecting contact impedance and temperature of a battery according to claim 11, wherein: The MCU chip (106) is further specifically used for: Using the collected temperature value of the first OT terminal (601) as the first temperature of the battery positive electrode column (201); When the first temperature exceeds a preset temperature value, it is determined whether the first contact impedance is less than the preset impedance value. If the first contact impedance is greater than the preset impedance value, it is determined that the abnormal point causing the abnormal temperature of the battery positive pole (201) is between the first aluminum sheet (701) and the first OT terminal (601) in the charge and discharge circuit of the battery (20), and the abnormal temperature of the battery positive pole (201) is caused by poor contact between the first aluminum sheet (701) and the first OT terminal (601).

16. The device for detecting contact impedance and temperature of a battery according to claim 11, wherein: The MCU chip (106) is further specifically used for: Using the collected temperature value of the first OT terminal (601) as the first temperature of the battery positive electrode column (201); When the first temperature exceeds the preset temperature value, it is determined whether the first contact impedance is less than the preset impedance value. If the first contact impedance is less than the preset impedance value, it is determined that the abnormal point position causing the abnormal temperature of the battery positive electrode column (201) is between the battery positive electrode column (201) and the first aluminum sheet (701) in the charge and discharge circuit of the battery (20), and the abnormal temperature of the battery positive electrode column (201) is caused by poor contact between the battery positive electrode column (201) and the first aluminum sheet (701). Alternatively, it is determined that the abnormal point position causing the abnormal temperature of the battery positive electrode column (201) is between the first OT terminal (601) and the cable for connecting the power module (30) in the charge and discharge circuit of the battery (20), and the abnormal temperature of the battery positive electrode column (201) is caused by poor contact between the first OT terminal (601) and the cable for connecting the power module (30).

17. The device for detecting contact impedance and temperature of a battery according to claim 11, wherein: The MCU chip (106) is further specifically used for: Using the collected temperature value of the second OT terminal (602) as the second temperature of the battery negative electrode column (202); When the second temperature exceeds the preset temperature value, it is determined whether the second contact impedance is less than the preset impedance value. If the second contact impedance is greater than the preset impedance value, it is determined that the abnormal point position causing the abnormal temperature of the battery negative pole (202) is between the second aluminum sheet (702) and the second OT terminal (602) in the charge and discharge circuit of the battery (20), and the abnormal temperature of the battery negative pole (202) is caused by poor contact between the second aluminum sheet (702) and the second OT terminal (602).

18. The device for detecting contact impedance and temperature of a battery according to claim 11, wherein: The MCU chip (106) is further specifically used for: Using the collected temperature value of the second OT terminal (602) as the second temperature of the battery negative electrode column (202); When the second temperature exceeds the preset temperature value, it is determined whether the second contact impedance is less than the preset impedance value. If the second contact impedance is less than the preset impedance value, it is determined that the abnormal point causing the abnormal temperature of the battery negative electrode column (202) is between the battery negative electrode column (202) and the second aluminum sheet (702) in the charge and discharge circuit of the battery (20), and the abnormal temperature of the battery negative electrode column (202) is caused by poor contact between the battery negative electrode column (202) and the second aluminum sheet (702), or, It is determined that the abnormal point location causing the abnormal temperature of the battery negative pole (202) is between the second OT terminal (602) in the charge and discharge circuit of the battery (20) and the cable for connecting to the power module (30), and the abnormal temperature of the battery negative pole (202) is caused by poor contact between the second OT terminal (602) and the cable for connecting to the power module (30).

19. The device for detecting contact impedance and temperature of a battery according to claim 11, wherein: The temperature of the battery positive pole (201), the temperature of the battery negative pole (202), and the current flowing between the first end of the first OT terminal (601) and the power module (30) are periodically collected through the Hall current collection circuit (40), the first contact impedance and the second contact impedance are calculated and obtained through the MCU chip (106), and the unique code of the battery (20) with abnormal temperature of the battery positive pole (201) or abnormal temperature of the battery negative pole (202) is periodically uploaded to the central control machine.

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