Method and device for high-efficiently screening low-voltage battery after formation

Abstract

The present application relates to the technical fields of screening low-voltage batteries, in particular to a method and device for efficiently screening low-voltage batteries after formation, comprising a box, conductive sponges and clamps, a plurality of batteries are placed side by side in the box, and the clamps clamp the conductive sponges on the negative and positive poles of the batteries. The present application has the following advantages: in the present application, low-voltage batteries in a box are found out within 4 seconds by monitoring the temperature rise, and conductive sponges are used in the present application, which are soft, have small resistance, small heat capacity, poor heat conduction, two conductive sponges clamp the positive poles of the batteries in the box, and the other two conductive sponges clamp the negative poles, the conductive sponges are connected to a constant voltage source, the local temperature rise of the conductive sponges reflects the local current size, the temperature rise of each place in the conductive sponges is monitored by a temperature probe, the current size of each place is comprehensively analyzed, and then the position of the low-voltage battery is analyzed. The present application can efficiently screen out low-voltage batteries, reduce the labor intensity of workers, and avoid mistakes and omissions.

Description

Technical Field

[0001] This invention relates to the field of low-voltage battery screening technology, specifically to a method and apparatus for efficient screening of low-voltage batteries after formation. Background Technology

[0002] After the batteries have undergone formation in the formation cabinet, their voltage needs to be checked to screen out low-voltage batteries, which then undergo formation again. The formation cabinet automatically checks the voltage. However, the following two situations exist:

[0003] 1) In the first case, the formation cabinet location is abnormal, and the voltage measurement value is significantly higher than normal;

[0004] 2) In the second scenario, when employees remove batteries from the cabinet, they may mistakenly find the wrong battery and fail to identify the actual low-voltage one. In this case, it may be necessary to retest the voltage of all removed batteries. Specifically, small, pouch batteries are often neatly stacked in boxes, and employees manually test their voltage one by one using a voltmeter. This process is time-consuming and prone to errors. Summary of the Invention

[0005] To address the problems in the prior art, this invention provides a method and apparatus for efficiently screening low-voltage batteries after formation.

[0006] The technical solution adopted by this invention to solve its technical problem is as follows: a device for high-efficiency screening of low-voltage batteries after formation, including a material box, conductive sponges, and clips. Several batteries are arranged side by side in the material box, and conductive sponges are provided on both sides of the negative and positive tabs of the batteries. An aluminum alloy shell is tightly fitted to the conductive sponges, ensuring close electrical contact between the conductive sponges and the aluminum alloy shell. An electrode of a constant voltage source is connected to the aluminum alloy shell, and the clips are connected to the aluminum alloy shell, clamping the conductive sponges onto the tabs. The aluminum alloy shell of the clip holding the positive tab is connected to the positive terminal of the constant voltage source, and the aluminum alloy shell of the clip holding the negative tab is connected to the negative terminal of the constant voltage source. The conductive sponges are soft, have low resistance, low heat capacity, and poor thermal conductivity. Two conductive sponges clamp the tabs, ensuring that the contact resistance between the conductive sponges and the tabs is sufficiently low. Irregular tab positions do not affect the electrical contact; even if the tab positions are irregular and the contact resistance between the conductive sponge and the tab is higher on one side, it remains sufficiently low on the other side.

[0007] A further technical improvement of the present invention is that: a number of through holes adapted to the battery are equally spaced on the aluminum alloy shell, and a number of indicator lights are equally spaced on one side wall of the aluminum alloy shell, and the indicator lights are controlled by an indicator light controller.

[0008] A further technical improvement of the present invention is that: several indicator lights are respectively adapted to several batteries.

[0009] A further technical improvement of the present invention is that the temperature probe is inserted vertically into the conductive sponge through the through hole on the aluminum alloy shell, and the aluminum alloy shells on the conductive sponges on both sides of the positive electrode tab are connected by wires, and the aluminum alloy shells on the conductive sponges on both sides of the negative electrode tab are also connected by wires.

[0010] A method for using a device for efficiently screening low-voltage batteries after formation, the method specifically includes the following steps:

[0011] Step 1: Connect the constant voltage source to the aluminum alloy casing to provide a constant voltage, connect the temperature probe to the thermometer, connect the thermometer and indicator light controller to the computer, and place the batteries side by side in the material box;

[0012] Step 2: The two clips, connected to the aluminum alloy casing and conductive sponge, clamp the positive and negative terminals of the battery respectively. The clips must be positioned accurately so that each indicator light is aligned with one of the battery terminals.

[0013] Step 3: When current flows through a localized area of ​​the conductive sponge, the temperature in that area immediately rises. A temperature probe monitors this temperature rise to track the current magnitude in that area. This process lasts for no more than 4 seconds. The computer collects data from various thermometers, comprehensively analyzes the current magnitude in each localized area, and then sends a control signal to illuminate the indicator light for the low-voltage battery. The computer uses this information to identify the low-voltage battery. The detection is completed within 4 seconds. Then, remove the two clips connecting the aluminum alloy casing and the conductive sponge from the positive and negative terminals.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] In this invention, low-voltage batteries in a battery box can be identified within 4 seconds by monitoring temperature rise. The invention utilizes conductive sponges, which are soft, have low resistance, low heat capacity, and poor thermal conductivity. Two conductive sponges clamp the positive electrode tab of the entire battery box, while two others clamp the negative electrode tab. A constant voltage source is connected externally to the conductive sponges. This invention reflects the local current magnitude through the local temperature rise of the conductive sponges. By monitoring the temperature rise at various points within the conductive sponges using temperature probes, and comprehensively analyzing the current magnitude at each point, the location of the low-voltage battery can be determined. This invention efficiently screens out low-voltage batteries, reduces the labor intensity of workers, and avoids errors and omissions. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a top view of the overall implementation of the present invention.

[0018] Figure 2 For the present invention Figure 1 Enlarged view of details in area A.

[0019] Figure 3 This is a schematic diagram illustrating the abnormal temperature rise around the low-voltage battery tab during the implementation of this invention.

[0020] In the diagram: 1. Material box; 2. Battery; 3. Negative tab; 4. Positive tab; 5. Airbag; 6. Conductive sponge; 7. Aluminum alloy shell; 8. Through hole; 9. Clip; 10. Indicator light; 11. Temperature probe. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] like Figures 1-2 As shown, the device for high-efficiency screening of low-voltage batteries after formation according to the present invention includes a material box 1, conductive sponge 6, and clips 9. Several batteries 2 are arranged side-by-side in the material box 1, and conductive sponge 6 is provided on both sides of the negative electrode tab 3 and positive electrode tab 4 of the battery 2. An aluminum alloy shell 7 is tightly fitted to the conductive sponge 6, maintaining close electrical contact between the conductive sponge 6 and the aluminum alloy shell 7. The contact resistance between the conductive sponge 6 and the aluminum alloy shell 7 is less than 2 ohms, and an electrode of a constant voltage source is connected externally. The aluminum alloy shell 7 is connected to the clips 9, which clamp the conductive sponge 6 onto the electrode tabs through the aluminum alloy shell 7. The aluminum alloy shell of one clip is connected to the positive electrode of the constant voltage source, and the aluminum alloy shell of the other clip is connected to the negative electrode of the constant voltage source. The constant voltage source provides a constant voltage, the value of which is between the maximum value of the overall battery voltage after formation and the lower limit voltage for screening low-voltage batteries. The indicator light 10 corresponds to the electrode tab position. The duration for which the conductive sponge 6 clamps the electrode tab is less than 4 seconds. The computer collects temperature rise data at various points inside the conductive sponge, comprehensively analyzes the current magnitude at each point, and then determines the location of the low-voltage battery. The indicator light 10 at that location then illuminates. The conductive sponge 6 is soft, has low resistance, low heat capacity, and poor thermal conductivity. Two conductive sponges 6 clamp the electrode tab, ensuring that the contact resistance between the conductive sponge 6 and the electrode tab is sufficiently low. Irregular electrode tab positioning will not affect the electrical contact. To ensure consistent voltage, the two conductive sponges 6 clamping the same electrode tab are connected by a wire to their aluminum alloy casing 7, which is then connected to the electrodes of the constant voltage source.

[0023] The two conductive sponge clips hold the positive electrode 4 and the negative electrode 3 for no more than 4 seconds. The computer collects temperature rise data from different locations, comprehensively analyzes the current magnitude in each local area, and then determines whether a low-voltage battery exists and its specific location. If a low-voltage battery is present, the computer sends a control signal to illuminate the indicator light 10 showing the location of the low-voltage battery.

[0024] The conductive sponge clip is a single unit consisting of a conductive sponge 6, an aluminum alloy shell 7, a clip 9, a temperature probe 11, and an indicator light 10. During testing, several batteries 2 are placed side-by-side in the material box 1. Two conductive sponge clips are respectively attached to the negative electrode 3 and the positive electrode 4 of the battery 2. Furthermore, the aluminum alloy shell 7 of the conductive sponge clip holding the negative electrode 3 is connected to the negative terminal of a constant voltage source. The aluminum alloy shell 7 of the conductive sponge clip holding the positive electrode 4 is connected to the positive terminal of a constant voltage source.

[0025] In one optional embodiment of the present invention, a plurality of through holes 8 adapted to the battery 2 are provided at equal intervals on the aluminum alloy shell 7, and a plurality of indicator lights 10 are provided at equal intervals on one side wall of the aluminum alloy shell 7, and the indicator lights 10 are controlled by an indicator light controller to switch on and off.

[0026] In an optional embodiment of the present invention, each through-hole 8 has a temperature probe 11 passing through and vertically inserted into the conductive sponge 6. It is fixed in place. During use, the temperature probe 11 does not need to be inserted or removed. The temperature probe 11 is connected to an external thermometer. Furthermore, the clip 9 is preferably connected to the aluminum alloy casing 7 at the middle position along its length, ensuring balanced force distribution.

[0027] like Figure 3 As shown, the temperature probe 11 is indicated by black, indicating a significant temperature rise, and the temperature around the low-voltage battery tab is abnormally high. Subsequently, the indicator light 10 corresponding to the low-voltage battery will light up.

[0028] A method for using a device for efficiently screening low-voltage batteries after formation, the method specifically includes the following steps:

[0029] Step 1: Connect the constant voltage source to the aluminum alloy casing 7 to provide a constant voltage, connect the temperature probe 11 to the thermometer, connect the thermometer and indicator light controller to the computer, and place the batteries 2 side by side in the material box 1;

[0030] Step 2: The two clips 9, connected to the aluminum alloy shell 7 and the conductive sponge 6, respectively clamp the positive terminal 4 and the negative terminal 3 of the battery 2. The clamps must be positioned accurately so that each indicator light 10 is aligned with one of the terminals of the battery 2.

[0031] Step 3: When current flows through a localized area of ​​the conductive sponge 6, the temperature in that area immediately rises. The temperature rise is monitored by the temperature probe 11 to track the current magnitude in that area. This process lasts for no more than 4 seconds. The computer collects data from various thermometers, comprehensively analyzes the current magnitude in each localized area, and then sends a control signal to illuminate the indicator light 10 showing the location of the low-voltage battery. The computer uses this information to identify the low-voltage battery. The detection is completed within 4 seconds. Then, the two clips 9, connected to the aluminum alloy casing 7 and the conductive sponge 6, are removed from the positive and negative tabs 4 and 3.

[0032] In this invention, low-voltage batteries in a battery box can be identified within 4 seconds by monitoring temperature rise. The invention utilizes conductive sponges 6, which are soft, have low resistance, low heat capacity, and poor thermal conductivity. Two conductive sponges 6 clamp the positive electrode tab 4 of the entire battery box 2, and two more clamp the negative electrode tab 3. A constant voltage source is connected to the conductive sponges 6. This invention uses the local temperature rise of the conductive sponges 6 to reflect the local current magnitude. By monitoring the temperature rise at various points inside the conductive sponges 6 with a temperature probe, and comprehensively judging the current magnitude at each point, the location of the low-voltage battery can be determined. This invention can efficiently screen low-voltage batteries, reduce the labor intensity of workers, and avoid errors and omissions.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for efficiently screening low-voltage batteries after formation, characterized in that: The battery (2) includes a material box (1), a conductive sponge (6), an aluminum alloy shell (7), and a clip (9). Several batteries (2) are placed side by side in the material box (1). The negative electrode (3) and positive electrode (4) of the battery (2) are provided with conductive sponge (6). The conductive sponge (6) is tightly fitted with the aluminum alloy shell (7). The aluminum alloy shell (7) is connected to the clip (9). The clip (9) clamps the conductive sponge (6) on the negative electrode (3) and positive electrode (4) of the battery (2) through the aluminum alloy shell (7). The contact resistance between the aluminum alloy shell (7) and the conductive sponge (6) is less than 2 ohms. The aluminum alloy shell (7) has several through holes (8) that are compatible with the battery (2) at equal intervals, and several indicator lights (10) are evenly spaced on one side wall of the aluminum alloy shell (7). The indicator lights (10) are controlled by the indicator light controller. The temperature probe (11) is inserted vertically into the conductive sponge (6) through the through hole (8), and the aluminum alloy shells (7) on the two conductive sponges (6) that clamp the positive electrode (4) are connected by wires, and the aluminum alloy shells (7) on the two conductive sponges (6) that clamp the negative electrode (3) are also connected by wires.

2. The apparatus for high-efficiency screening of low-voltage batteries after formation according to claim 1, characterized in that: Several indicator lights (10) are respectively matched with several batteries (2).

3. The method of using the apparatus for high-efficiency screening of low-voltage batteries after formation as described in any one of claims 1-2, characterized in that: The method specifically includes the following steps: Step 1: Connect the constant voltage source to the aluminum alloy shell (7) to provide a constant voltage, connect the temperature probe (11) to the thermometer, connect the thermometer and indicator light controller to the computer, and place the batteries (2) side by side in the material box (1); Step 2: Two clips (9) are connected to the aluminum alloy shell (7) and the conductive sponge (6) to clamp the positive electrode (4) and negative electrode (3) of the battery (2) respectively, and make each indicator light (10) align with the electrode of one battery (2); Step 3: When current flows through a local area of ​​the conductive sponge (6), the temperature of that area rises immediately. The temperature rise of the local area is monitored by the temperature probe (11) to monitor the current magnitude in that area. The duration is within 4 seconds. The computer collects data from each thermometer, comprehensively judges the current magnitude in each local area, and then gives a control signal to make the indicator light (10) of the low-voltage battery location light up. The computer uses this to screen out the low-voltage battery. The detection ends within 4 seconds. Remove the two clips (9) connected to the aluminum alloy shell (7) and the conductive sponge (6) from the positive electrode (4) and the negative electrode (3).

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