A lithium battery discharge test device

Abstract

A lithium battery discharge test device includes a tester body, wherein the outer side of the tester body is provided with multiple groups of anode columns and cathode columns through electrical connection, and the same group of anode columns and cathode columns correspond to each other up and down; a bottom plate is fixedly installed on the side of the tester body, and a top plate is movably installed; multiple cathode columns are fixedly arranged and fixedly installed along the length direction of the bottom plate, and multiple anode columns are arranged along the length direction of the top plate and movably installed with the top plate, and can move in a direction perpendicular to the extension of the top plate. By being able to adjust the distance between the top plate and the bottom plate, and then adjusting the distance between the anode column and the cathode column, the test of batteries of different sizes is realized, and further, by means of the adjustable anode column, the distance between the multiple anode columns and the cathode column can be adjusted individually, which not only reduces the size requirements for the battery and the anode and cathode columns, and can quickly complete the adjustment, but also enables the tester to test lithium batteries of different sizes at the same time, thereby improving the flexibility and practicality of the device.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery testing, in particular to a lithium battery discharge testing device. Background Art

[0002] Lithium battery is a primary battery that uses lithium metal or lithium alloy as the negative electrode material and a non-aqueous electrolyte solution. Lithium batteries generally include cylindrical lithium batteries, square lithium batteries, soft-pack batteries, etc. After the lithium battery is manufactured, in order to verify the quality and performance of the lithium battery of the product and further clear the transmission path of ions between the positive and negative electrodes, improve the cycle performance of the lithium battery during later use, and ensure the safety performance of the product after leaving the factory, the lithium battery needs to be subjected to several charge and discharge tests before shipment. This process is called "capacity grading".

[0003] When conducting battery charge and discharge tests, a test device, that is, a capacity distribution cabinet, is required to place multiple cylindrical batteries between the positive and negative poles. The cylindrical batteries can be fixed while being charged and discharged. However, the distance between the positive and negative poles of the existing test device can only be adjusted several times, and the battery sizes that can be adapted are relatively small. The size cannot be fine-tuned, and the size of the battery and the positive and negative poles is relatively precise, which makes adjustment more difficult. In addition, all the poles move synchronously during adjustment, so that the distance between each group of test poles is consistent. Only the same model of battery can be tested at a time, which makes the flexibility of the test device poor. Utility Model Content

[0004] In order to solve the technical problems existing in the above-mentioned background technology, the utility model provides a lithium battery discharge test device.

[0005] The technical solution of this utility model is as follows:

[0006] A lithium battery discharge test device comprises a tester body, wherein a plurality of groups of anode columns and cathode columns are electrically connected to the outside of the tester body, and the anode columns and cathode columns of the same group correspond to each other up and down, and can fix the battery to be tested;

[0007] A bottom plate is fixedly mounted on the side of the tester body and a top plate is movably mounted, and the distance between the top plate and the bottom plate can be adjusted;

[0008] A plurality of cathode columns are arranged and fixedly installed along the length direction of the bottom plate, and a plurality of anode columns are arranged along the length direction of the top plate and movably installed with the top plate, and can move along the direction perpendicular to the extension of the top plate.

[0009] The top plate is fixed in such a manner that ear plates are arranged on both sides of the top plate, and the ear plates are fixed to the tester body by bolts.

[0010] The height of the top plate is adjusted in such a way that a plurality of threaded holes are opened on the side of the tester body from top to bottom, and the distance between the top plates is adjusted by fixing bolts with different threaded holes.

[0011] In order to adjust the distance between the anode column and the cathode column, the anode column penetrates the top plate and is slidably arranged therewith, a limit block is arranged at the bottom end of the anode column, and the limit block is connected to the top plate via a supporting spring.

[0012] In order to ensure that the anode column remains connected to the tester body when moving, a strip groove is provided on the side of the tester body, and the tester body is connected to the anode column through a wire passing through the strip groove.

[0013] In order to improve the stability of the battery to be tested, a plurality of groups of limiting components are arranged on the bottom plate corresponding to the cathode columns, which can clamp the battery to be tested.

[0014] The specific structure of the limiting assembly is that each group of limiting assemblies includes limiting plates movably arranged on both sides of the anode column, and the distance between the limiting plates on both sides can be adjusted.

[0015] The distance of the limit plate is adjusted in such a way that a slide groove is provided on the bottom plate on both sides of the cathode column, and a slide column is installed in the slide groove, the bottom of the limit plate is slidably connected to the slide column through a slider, and a reset spring is connected to the side of the slider away from the cathode column.

[0016] In order to adapt to the outer edge surface of the battery, the side of the limiting plate close to the cathode column is set to be arc-shaped.

[0017] In order to facilitate the switching and status display of the tester, a power switch is also arranged on the side of the tester body, and an indicator light is arranged above the power switch.

[0018] The beneficial effects of the utility model are as follows: the utility model is a lithium battery discharge test device, firstly, multiple groups of anode columns and cathode columns corresponding to each other are electrically connected through the tester body, so that multiple cylindrical lithium batteries can be fixed at the same time, and the function of performing discharge tests on multiple lithium batteries at the same time is realized;

[0019] Secondly, by being able to adjust the distance between the top plate and the bottom plate, and then adjusting the distance between the anode column and the cathode column, the test of batteries of different sizes is realized, and further, through the adjustable anode column, the distance between multiple anode columns and the cathode column can be adjusted separately, which not only reduces the size requirements for the battery and the anode and cathode columns, and can quickly complete the adjustment, but also enables the tester to test lithium batteries of different sizes at the same time, improving the flexibility and practicality of the device;

[0020] Finally, by setting limit assemblies on both sides of the cathode column, the tested battery can be clamped and limited, which makes up for the problem that the battery is easy to tip over due to the contact area between the anode column and the cathode column and the battery, and improves the stability of the tested battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] By reading the detailed description of the preferred embodiment below, the scheme and advantages of the present application will become clear to those skilled in the art. The accompanying drawings are only used to illustrate the preferred embodiment and are not considered to be limiting of the present invention.

[0022] In the attached picture:

[0023] Figure 1 It is a schematic diagram of the test device structure;

[0024] Figure 2 This is the enlarged view of point A;

[0025] Figure 3 This is a schematic diagram of the structure of the part without the anode column installed;

[0026] Figure 4 A top view of the battery clamped by the limit assembly;

[0027] The components represented by the reference numerals in the figure are:

[0028] 1. Tester body; 2. Anode column; 3. Cathode column; 4. Battery; 5. Bottom plate; 6. Top plate; 7. Ear plate; 8. Bolt; 9. Threaded hole; 10. Limit block; 11. Support spring; 12. Strip groove; 13. Wire; 14. Limit plate; 15. Slide groove; 16. Slide column; 17. Slider; 18. Reset spring; 19. Power switch; 20. Indicator light. DETAILED DESCRIPTION

[0029] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings.

[0030] Example

[0031] As mentioned in the background technology, a tester, also called a capacity dividing cabinet, is required for the charge and discharge test of the battery 4. The battery 4 is fixed between the cathode column 3 and the anode column 2, and the instrument is started to perform a discharge test. However, in actual use, only a few positions can be adjusted between the anode column 2 and the cathode column 3, and it can only adapt to different sizes. It cannot be fine-tuned according to the height of the battery 4. The size requirements for the battery 4 and the anode column 2 and the cathode column 3 are relatively precise. Although multiple batteries 4 can be tested, only one size of battery 4 can be tested each time, and the flexibility is poor. Therefore, the inventor has made improvements on the basis of the existing tester and designed a new test device, which is described in detail below with reference to the drawings.

[0032] This embodiment provides a lithium battery discharge test device. Figure 1 , including a tester body 1, and a power switch 19 and an indicator light 20 are arranged on the side of the tester body 1, which can turn on and off the tester and display the status. The tester body 1 adopts the existing instrument, and only the battery 4 fixing parts and related components and connection relationships on its side are improved. The outer side of the tester body 1 is electrically connected with multiple groups of anode columns 2 and cathode columns 3, and the connection methods of the anode columns 2 and the cathode columns 3 are consistent with the prior art, ensuring that normal battery 4 discharge tests can be performed, and the same group of anode columns 2 and cathode columns 3 correspond to each other up and down, and the vertical centers of the two are on the same vertical straight line, and the multiple batteries 4 to be tested are fixed one by one between the corresponding cathode columns 3 and anode columns 2.

[0033] In this embodiment, a base plate 5 is fixedly installed on the side of the tester body 1, and the base plate 5 extends along the length direction of the tester body 1. Multiple cathode columns 3 are arranged at intervals along the length direction of the base plate 5 and fixedly installed on the base plate 5. The tester body 1 is connected to the multiple cathode columns 3 respectively through connecting wires penetrating into the base plate 5, and multiple connectors are also connected to the front side of the base plate 5, which can be connected to the soft-pack battery 4 or the square battery 4 through wire clamps.

[0034] On the basis of the above structure, a top plate 6 is also movably installed on the side of the tester body 1. The movable installation means that the distance between the top plate 6 and the bottom plate 5 can be adjusted. Specifically, ear plates 7 are provided on both sides of the top plate 6, and the ear plates 7 are fixed to the tester body 1 by bolts 8. In order to be able to adjust the distance between the top plate 6 and the bottom plate 5, a plurality of threaded holes 9 are opened from top to bottom on the side of the tester body 1, and corresponding to the ear plates 7 on both sides, the threaded holes 9 are opened in two rows in the vertical direction, which are respectively used to fix the ear plates 7 on both sides. By fixing the bolts 8 and different threaded holes 9, the different heights of the top plate 6 can be adjusted, and finally the distance between the top plate 6 and the bottom plate 5 can be adjusted.

[0035] One of the main technical points of this solution is that not only the position of the top plate 6 can be adjusted, but in this solution, multiple anode columns 2 are arranged along the length direction of the top plate 6 and are movably installed with the top plate 6, and can move in the direction perpendicular to the extension of the top plate 6. Specifically, the anode column 2 penetrates the top plate 6 and is slidably arranged with it, so that the length of the bottom end of the anode column 2 extending from the top plate 6 can be adjusted. In order to fix the anode column 2 and press the battery 4, a limit block 10 is provided at the bottom end of the anode column 2, and the limit block 10 is connected to the top plate 6 by a support spring 11, and the support spring 11 is sleeved on the outside of the anode column 2. Furthermore, the elastic force of the support spring 11 can ensure that when the anode column 2 is in the initial state, a part of the upper end is in the top plate 6, ensuring that the anode column 2 will not fall, and the anode column 2 can be fixed to the bottom surface of the top plate 6 by the limit block 10. The anode of the battery 4 can push the anode column 2 upward, and the battery 4 is pressed by the support spring 11. Through this design, the top plate 6 does not need to be adjusted to a precise position, and a rough adjustment can be performed first, and then fine-tuning can be performed through the movable anode column 2, which facilitates the adjustment of the spacing between the fixed batteries 4 and enables the device to test batteries 4 of different sizes at one time, and the flexibility and practicality are greatly improved.

[0036] Based on the above structure, combined with Figure 3 Since the anode column 2 can move up and down through the movable connection with the top plate 6, in order to ensure that it can still maintain the connection with the tester body 1 when moving, the two are mainly connected by a wire 13, and the wire 13 extends to the outside of the tester body 1. Therefore, a strip groove 12 is opened at the position of the tester body 1 where the wire 13 extends, and the strip groove 12 is opened vertically, so that the wire 13 can move up and down along the strip groove 12 when the anode column 2 moves up and down.

[0037] As one of the other main design points of this scheme, combined with Figure 2 and Figure 4 , a plurality of groups of limiting components are arranged on the bottom plate 5 corresponding to the cathode column 3, which can clamp the battery 4 to be tested. The number of the plurality of groups of limiting components is consistent with the number of the cathode columns 3, and is used to clamp the battery 4 placed between the cathode column 3 and the anode column 2. Specifically, each group of limiting components includes limiting plates 14 movably arranged on both sides of the anode column 2, and the distance between the limiting plates 14 in the same group can be adjusted, so that batteries 4 of different sizes can be limited. In order to ensure that they can adapt to the outer edge surface of the battery 4, the opposite side of the limiting plates 14 in the same group is set to an arc shape.

[0038] In this embodiment, the limit plate 14 is mainly used to adjust the distance by setting the elastic member, wherein, in combination with Figure 2, the bottom plate 5 on both sides of the cathode column 3 is provided with a slide groove 15, and a slide column 16 is installed in the slide groove 15, the extension direction of the slide column 16 is consistent with the extension direction of the bottom plate 5, and a slider 17 is provided through the slide column 16, the slider 17 is slidably connected to the slide column 16, and the upper end surface of the slider 17 is connected to the upper end surface of the limit plate 14, so that the limit plate 14 can slide along the extension direction of the slide column 16 through the slider 17, and the two sliders 17 connected at the bottom of the two adjacent groups of limit plates 14 are in the same slide groove 15 and are installed at both ends of the same slide column 16, and in order to The battery 4 can be clamped to provide support for the limit plate 14. A return spring 18 is connected to the side of the slider 17 away from the cathode column 3. The return spring 18 is sleeved on the outside of the slide column 16. It should be explained that the other ends of the return springs 18 connected to the two sliders 17 on both sides are connected to the corresponding side walls of the slide groove 15, and the two sliders 17 on the same slide column 16 are respectively connected to the two ends of the return spring 18. The limit plate 14 is pushed by the return spring 18 to clamp the battery 4, and after the battery 4 is removed, the return spring 18 can push the slider 17 to return to its original position.

Claims

1. A lithium battery discharge test device, comprising a tester body (1), wherein the outer side of the tester body (1) is electrically connected with a plurality of groups of anode columns (2) and cathode columns (3), characterized in that: The same set of anode columns (2) and cathode columns (3) correspond to each other up and down, and can fix the battery (4) to be tested; A bottom plate (5) is fixedly mounted on the side of the tester body (1) and a top plate (6) is movably mounted, and the distance between the top plate (6) and the bottom plate (5) is adjustable; A plurality of cathode columns (3) are arranged and fixedly installed along the length direction of the bottom plate (5), and a plurality of anode columns (2) are arranged along the length direction of the top plate (6) and are movably installed with the top plate (6) and are capable of moving in a direction perpendicular to the extension of the top plate (6).

2. The lithium battery discharge test device according to claim 1, characterized in that: Ear plates (7) are provided on both sides of the top plate (6), and the ear plates (7) are fixed to the tester body (1) by bolts (8).

3. The lithium battery discharge test device according to claim 2, characterized in that: A plurality of threaded holes (9) are provided on the side of the tester body (1) from top to bottom, and the distance between the top plate (6) and the bottom plate (5) is adjusted by fixing bolts (8) with different threaded holes (9).

4. The lithium battery discharge test device according to claim 1, characterized in that: The anode column (2) penetrates the top plate (6) and is slidably arranged therewith; a limit block (10) is arranged at the bottom end of the anode column (2), and the limit block (10) and the top plate (6) are connected via a support spring (11).

5. The lithium battery discharge test device according to claim 4, characterized in that: A strip groove (12) is provided on the side of the tester body (1), and the tester body (1) is connected to the anode column (2) via a wire (13) passing through the strip groove (12).

6. The lithium battery discharge test device according to claim 1, characterized in that: A plurality of groups of limiting components are arranged on the bottom plate (5) corresponding to the cathode columns (3), and are capable of clamping the battery (4) to be tested.

7. The lithium battery discharge test device according to claim 6, characterized in that: Each set of limiting components comprises limiting plates (14) movably arranged on both sides of the anode column (2), and the distance between the limiting plates (14) on both sides can be adjusted.

8. The lithium battery discharge test device according to claim 7, characterized in that: The bottom plates (5) on both sides of the cathode column (3) are provided with sliding grooves (15), and sliding columns (16) are installed in the sliding grooves (15). The bottom of the limit plate (14) is slidably connected to the sliding column (16) via a sliding block (17), and a return spring (18) is connected to the side of the sliding block (17) away from the cathode column (3).

9. The lithium battery discharge test device according to claim 8, characterized in that: The side of the limiting plate (14) close to the cathode column (3) is arranged in an arc shape.

10. The lithium battery discharge test device according to claim 1, characterized in that: A power switch (19) is also provided on the side of the tester body (1), and an indicator light (20) is provided above the power switch (19).

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