Device for automatically and continuously measuring current of single batteries in parallel battery pack

Abstract

The utility model relates to a device for automatically and continuously measuring current of single batteries in a parallel battery pack, which is characterized in that resistors and single batteries are connected in series to form resistor-battery series circuits, and a plurality of groups of resistor-battery series circuits are connected in parallel to form the parallel battery pack; first charge-discharge equipment is arranged at two ends of the resistor; second charge-discharge equipment is arranged at two ends of the parallel battery pack When the parallel battery pack is charged and discharged, the charging and discharging equipment has the function of measuring the voltage at the two ends of each resistor in real time and automatically records data and generates a table, and a researcher can calculate and obtain the real-time current value I of each single battery through the formula I = U / R according to the voltage data recorded by the equipment. Therefore, the function of automatically and continuously measuring the current of each single battery in the battery pack is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to power battery technical field especially is related to a device for automatically continuously measuring single battery current in parallel battery pack. BACKGROUND

[0002] Power battery is widely used in new energy automobile, electric tool and other products, generally, single battery cannot be used directly, needs to carry out parallel connection, and the charge-discharge current of each single battery will have difference after parallel connection, and the difference will influence the service life of battery pack, therefore, the charge-discharge current of each single battery in parallel battery pack needs to be measured in laboratory, currently, current detector is mainly used, but handheld current detector cannot automatically continuously measure and record current, and the error is larger. UTILITY MODEL CONTENTS

[0003] The utility model provides a kind of method and device for measuring single battery current in parallel battery pack to the drawbacks of traditional handheld current detector, its structure is simple, can measure the charge-discharge current of each single battery in parallel battery pack in real time, and can automatically record, facilitate researcher to carry out analysis, and improve accuracy and work efficiency.

[0004] In order to realize the purpose of the utility model, the following technical solutions will be taken: a kind of device for automatically continuously measuring single battery current in parallel battery pack, resistance and single battery are connected in series to form resistance-battery series circuit, and a plurality of groups of resistance-battery series circuit are connected in parallel to form parallel battery pack, and first charge-discharge equipment is arranged at the two ends of resistance, and second charge-discharge equipment is arranged at the two ends of parallel battery pack.

[0005] The device for automatically continuously measuring single battery current in parallel battery pack described above, the two ends of resistance are connected with first charge-discharge equipment through first wire, and the two ends of first wire are fixed on the positive and negative poles of first charge-discharge equipment with insulating support respectively.

[0006] The device for automatically continuously measuring single battery current in parallel battery pack described above, the two ends of parallel battery pack are connected with second charge-discharge equipment through second wire, and the two ends of second wire are fixed on the positive and negative poles of second charge-discharge equipment with insulating support respectively.

[0007] The device for automatically continuously measuring single battery current in parallel battery pack described above, the insulating support is plastic or rubber material.

[0008] The device for automatically continuously measuring single battery current in parallel battery pack described above, the single battery is cylindrical battery, square battery or soft package battery.

[0009] The utility model discloses when parallel battery pack is charged and discharged, and the charging and discharging equipment has the function of real -time measurement of the both -end voltage (U) of each resistance, and automatically records data, and automatically generates the table, and through the voltage (U) data of equipment record, can be calculated through formula I = U / R, and the real -time each single battery current value I is obtained, so that the function of automatic measurement of each single battery real -time current in parallel battery pack is realized.

[0010] When using, according to the capacity of parallel battery pack and test current, corresponding resistance, each charging and discharging equipment, the specification of each wire is selected.

[0011] Compared with the traditional handheld current detector, the utility model discloses simple structure can automatically continuously measure the charging and discharging current of each single battery in parallel battery pack, and can automatically record, and the accuracy and work efficiency are improved. DRAWINGS

[0012] Figure 1 It is the structure schematic diagram of the utility model discloses a kind of automatic continuous measurement device of single battery current in parallel battery pack.

[0013] Reference signs:

[0014] 101, first charging and discharging equipment;102, second charging and discharging equipment;103, single battery;104, resistance;105, third wire;106, parallel battery pack;107, first wire;108, insulating support;109, second wire. DETAILED DESCRIPTION

[0015] Referring to Figure 1 A kind of automatic continuous measurement device of single battery current in parallel battery pack, resistance 104 is connected in series with single battery 103 and forms resistance-battery series circuit, two groups of resistance-battery series circuit are connected in parallel and form parallel battery pack 106, resistance 104 both ends are connected with first charging and discharging equipment 101 by first wire 107, and the both ends of first wire 107 are fixed in the positive and negative pole of first charging and discharging equipment 101 with insulating support 108 respectively.Parallel battery pack 106 both ends are connected with second charging and discharging equipment 102 by second wire 109, and the both ends of second wire 109 are fixed in the positive and negative pole of second charging and discharging equipment 102 with insulating support 108 respectively.The insulating support 108 is plastic or rubber material.The single battery 103 is cylindrical battery, square battery or soft package battery.

[0016] When the second charge-discharge device 102 charges and discharges the parallel battery group 106, the first charge-discharge device 101 can automatically and continuously measure and record the voltage (U) across the resistance 104, and automatically generate a table, through the voltage (U) data recorded by the device and the resistance value, the real-time current value I of each single battery can be calculated through the formula I=U / R, and the function of automatically and continuously measuring the real-time current of each single battery in the parallel battery group is realized.

[0017] In use, according to the capacity of the parallel battery group 106 and the test current, the resistance 104 with corresponding resistance value, the specifications of the first charge-discharge device 101 and the second charge-discharge device 102, the specifications of the first wire 107, the second wire 109 and the third wire 105 are selected.

[0018] Specifically, the first charge-discharge device 101 and the second charge-discharge device 102 have the functions of charging and discharging and measuring the battery voltage, and can automatically record data and automatically generate a table, through the voltage (U) data recorded by the device, the real-time current value I of each single battery 103 can be calculated through the formula I=U / R, and the function of automatically measuring the real-time current of each single battery 103 in the battery group is realized.

[0019] Figure 1 In the embodiment, the first charge-discharge device 101 for measuring the voltage across the resistance 104 is only two, which is to simplify the drawing and only lists the use mode of two parallel battery groups 106. When the parallel battery group 106 is 2 or more, the corresponding first charge-discharge device 101 will also increase, so the number of first charge-discharge devices 101 in the drawing and the number of single batteries 103 in the parallel battery group 106 cannot be regarded as a limitation of the use of the new type.

Claims

1. An apparatus for automatically and continuously measuring the current of individual cells in a parallel battery pack, characterized by, The resistance (104) and the single battery (103) are connected in series to form a resistance-battery series circuit, a plurality of groups of resistance-battery series circuits are connected in parallel to form a parallel battery pack (106), the resistance (104) is provided with a first charging and discharging device (101) at both ends, and the parallel battery pack (106) is provided with a second charging and discharging device (102) at both ends.

2. A device for automatically and continuously measuring the current of individual cells in a parallel battery pack according to claim 1, characterized in that, The resistance (104) is connected with the first charging and discharging device (101) through the first lead wire (107) at both ends, and both ends of the first lead wire (107) are fixed on the positive and negative electrodes of the first charging and discharging device (101) by the insulating support (108).

3. The apparatus for automatically and continuously measuring the current of individual cells in a parallel battery pack of claim 1, wherein, The parallel battery pack (106) is connected with the second charging and discharging device (102) through the second lead wire (109) at both ends, and both ends of the second lead wire (109) are fixed on the positive and negative electrodes of the second charging and discharging device (102) by the insulating support (108).

4. A device for automatically and continuously measuring the current of individual cells in a parallel battery according to claim 2 or 3, characterized in that, The insulating support (108) is made of plastic or rubber.

5. The apparatus for automatically and continuously measuring the current of individual cells in a parallel battery of claim 1, wherein, The single battery (103) is a cylindrical battery, a square battery or a soft package battery.

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