Cell DC internal resistance detection device

Abstract

The utility model relates to the technical field of detection devices, in particular to a cell DC internal resistance detection device. The battery internal resistance tester comprises a battery internal resistance tester body, the positive and negative ends of the battery internal resistance tester body are fixedly connected with wires, the right side of the wires is provided with a clamping assembly and an adjusting assembly, the adjusting assembly comprises a pair of first battery boxes and a pair of second battery boxes, the right end of each first battery box is fixedly connected with a round rod, and the right end of each second battery box is fixedly connected with a clamping assembly. The round rods are inserted into the second battery boxes in a sliding mode, the other ends of the round rods are fixedly connected with first springs, the other ends of the first springs are fixed to the second battery boxes, connecting blocks are arranged between the two first battery boxes and the pair of second battery boxes, and conducting strips are installed in the connecting blocks. And when the length of the battery box is detected, the battery box matched with the length of the detected battery needs to be replaced, so that the detection efficiency of the DC internal resistance of the battery cell is influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of detection devices, in particular to a direct current internal resistance detection device for battery cells. Background Art

[0002] The detection device is used for detecting the direct current internal resistance of lithium battery cells. The detection device consists of a battery internal resistance tester body, two wires, a battery box, a conductive sheet, and a spring. When detecting the direct current internal resistance of lithium battery cells, start the battery internal resistance tester body, short-circuit the two wires to calibrate the internal resistance, then connect them to the conductive sheets on both sides of the battery box respectively, and clamp the battery into the battery box so that the spring contacts the battery, and then the battery internal resistance tester body conducts the detection.

[0003] The inventor found in daily work that when the detection device is in use, since the length of the battery box is fixed, when detecting a battery longer than the length of the battery box, it is necessary to replace the battery box that matches the length of the detected battery, which in turn affects the detection efficiency of the direct current internal resistance of the battery cells. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problem that in the actual use process, since the length of the battery box is fixed, when detecting a battery longer than the length of the battery box, it is necessary to replace the battery box that matches the length of the detected battery, which in turn affects the detection efficiency of the direct current internal resistance of the battery cells, and to propose a direct current internal resistance detection device for battery cells.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: a direct current internal resistance detection device for battery cells, including a battery internal resistance tester body, the positive and negative terminals of the battery internal resistance tester body are fixedly connected with wires, a clamping component and an adjusting component are arranged on the right side of the wires, the adjusting component includes a pair of battery boxes one and a pair of battery boxes two, a circular rod is fixedly connected to the right end of the battery box one, the circular rod is slidably inserted into the battery box two, a spring one is fixedly connected to the other end of the circular rod, the other end of the spring one is fixed to the battery box two, a connecting block is arranged between the two battery boxes one and the pair of battery boxes two, a conductive sheet is installed inside the connecting block, a spring two is fixedly connected to one side of the conductive sheet, and the conductive sheet is clamped with the wire.

[0006] The effects achieved by the above components are as follows: by setting the adjusting component, when it is necessary to adapt to a longer battery to measure the internal resistance of the battery cell, put the battery into the battery box one and the pair of battery boxes two, so that according to the length of the battery, the circular rod slides in the battery box two, and at the same time the spring one is stretched, and then the battery is clamped into the battery box one and the pair of battery boxes two, and then the wire is clamped into the conductive sheet on the connecting block, so that it is conducted through the spring two, which is convenient for detecting the internal resistance of a longer battery.

[0007] Preferably, a square rod is slidably inserted between the two battery boxes one and the pair of battery boxes two, the connecting block slides on the surface of the square rod, and a spring three is fixedly connected between the battery box one and the pair of battery boxes two and the connecting block.

[0008] The effects achieved by the above components are as follows: By providing the square rod and the spring three, a battery wider than the width between the battery box one and the pair of battery boxes two can be clamped.

[0009] Preferably, a strap is fixedly connected to the upper ends of the battery box one and the pair of battery boxes two on one side, and the other end of the strap penetrates through the battery box one and the pair of battery boxes two on the other side.

[0010] The effects achieved by the above components are as follows: By providing the strap, the battery is fixed.

[0011] Preferably, a hook-and-loop fastener one and a hook-and-loop fastener two are fixedly connected to the surface of the strap, and the hook-and-loop fastener one and the hook-and-loop fastener two are adapted to each other.

[0012] The effects achieved by the above components are as follows: By providing the hook-and-loop fastener one and the hook-and-loop fastener two, the strap is fixed.

[0013] Preferably, a plurality of the straps are provided, and the plurality of straps are evenly distributed on the battery box one and the pair of battery boxes two.

[0014] The effects achieved by the above components are as follows: By providing a plurality of straps, the battery is further fixed.

[0015] Preferably, the clamping assembly includes two evenly distributed cavity arc-shaped blocks fixedly connected to one end of the conductive sheet, and three evenly distributed arc-shaped pads are provided on the arc surface of the cavity arc-shaped block.

[0016] The effects achieved by the above components are as follows: When it is necessary to clamp a wire to the conductive sheet, the wire is inserted into the conductive sheet, so that the arc-shaped pads in the cavity arc-shaped block are pressed against the wire. The arc-shaped pads are rubber pads, thereby clamping the wire.

[0017] Preferably, a round rod is fixedly connected to one side of the arc-shaped pad, the round rod is slidably inserted into the cavity arc-shaped block, and an arc-shaped plate is fixedly connected between the two round rods.

[0018] The effects achieved by the above components are as follows: When the arc-shaped pad is pressed, the round rod slides, the middle round rod is pressed, and the arc-shaped plate is pressed, so that the arc-shaped pads on both sides further limit the wire.

[0019] Preferably, a spring four is fixedly connected to one end of the round rod, and the other end of the spring four is fixed to the cavity arc-shaped block.

[0020] The effects achieved by the above components are as follows: By providing the spring four, the middle round rod is reset.

[0021] In summary, the beneficial effects of the present utility model are as follows:

[0022] In the present utility model, by providing an adjustment component, when it is necessary to adapt to a longer battery for measuring the internal resistance of the battery core, the battery is placed into battery box one and battery box two, so that according to the length of the battery, the circular rod slides in battery box two, and at the same time, spring one is stretched. Then the battery is clamped into battery box one and battery box two, and then the wire is clamped onto the conductive sheet on the connection block, so that conduction is achieved through spring two. Thus, it is convenient to detect the internal resistance of a longer battery, solving the problem that since the length of the battery box is fixed, when detecting a battery longer than the length of the battery box, it is necessary to replace the battery box matching the length of the detected battery, which in turn affects the detection efficiency of the direct current internal resistance of the battery core. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0024] Figure 2 is a three-dimensional structural schematic diagram of a part of the present utility model;

[0025] Figure 3 is a three-dimensional structural schematic diagram of the adjustment component of the present utility model;

[0026] Figure 4 is a three-dimensional structural schematic diagram of a partial cross-section of the adjustment component of the present utility model;

[0027] Figure 5 is a three-dimensional structural schematic diagram of a cross-section of the clamping component of the present utility model.

[0028] Legend: 1. Battery internal resistance tester body; 2. Adjustment component; 3. Clamping component; 4. Wire; 21. Battery box one; 22. Battery box two; 23. Circular rod; 24. Spring one; 25. Square rod; 26. Spring three; 27. Connection block; 28. Conductive sheet; 29. Spring two; 210. Binding strap; 211. Magic tape one; 212. Magic tape two; 31. Cavity arc block; 32. Arc pad; 33. Round rod; 34. Spring four; 35. Arc plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] Referring to Figure 1 as shown, the present utility model provides a technical solution: A device for detecting the direct current internal resistance of a battery core includes a battery internal resistance tester body 1. The positive and negative terminals of the battery internal resistance tester body 1 are fixedly connected with a wire 4. On the right side of the wire 4, there are provided a clamping component 3 and an adjustment component 2.

[0030] Next, the specific settings and functions of the adjustment component 2 and the clamping component 3 will be specifically described.

[0031] Refer to Figure 2 and Figure 3 as well as Figure 4 As shown, in this embodiment: The adjusting component 2 includes a pair of first battery boxes 21 and a pair of second battery boxes 22. A circular rod 23 is fixedly connected to the right end of the first battery box 21. The circular rod 23 is slidably inserted into the second battery box 22. The other end of the circular rod 23 is fixedly connected to a first spring 24. The other end of the first spring 24 is fixed to the second battery box 22. A connecting block 27 is arranged between the two first battery boxes 21 and the pair of second battery boxes 22. A conductive sheet 28 is installed inside the connecting block 27. A second spring 29 is fixedly connected to one side of the conductive sheet 28. The conductive sheet 28 is clamped with the wire 4. By setting the adjusting component 2, when it is necessary to adapt to a longer battery for measuring the internal resistance of the battery core, the battery is placed into the first battery box 21 and the pair of second battery boxes 22, so that according to the length of the battery, the circular rod 23 slides in the second battery box 22, and at the same time the first spring 24 is stretched. Then the battery is clamped into the first battery box 21 and the pair of second battery boxes 22. Then the wire 4 is clamped onto the conductive sheet 28 on the connecting block 27, so that it is conducted through the second spring 29, which is convenient for detecting the internal resistance of the longer battery. A square rod 25 is slidably inserted between the two first battery boxes 21 and the pair of second battery boxes 22. The connecting block 27 slides on the surface of the square rod 25. A third spring 26 is fixedly connected between the first battery box 21 and the pair of second battery boxes 22 and the connecting block 27. By setting the square rod 25 and the third spring 26, a battery with a width greater than the width between the first battery box 21 and the pair of second battery boxes 22 can be clamped. A strap 210 is fixedly connected to the upper ends of one side of the first battery box 21 and the pair of second battery boxes 22. The other end of the strap 210 passes through the first battery box 21 and the pair of second battery boxes 22 on the other side. By setting the strap 210, the battery is fixed. A first magic tape 211 and a second magic tape 212 are fixedly connected to the surface of the strap 210. The first magic tape 211 and the second magic tape 212 are adapted to each other. By setting the first magic tape 211 and the second magic tape 212, the strap 210 is fixed. There are multiple straps 210. The multiple straps 210 are evenly distributed on the first battery box 21 and the pair of second battery boxes 22. By setting the multiple straps 210, the battery is further fixed.

[0032] Refer to Figure 5As shown in the figure, in this embodiment: The clamping assembly 3 includes two evenly distributed cavity arc-shaped blocks 31 fixedly connected to one end of the connecting block 27. The arc surface of the cavity arc-shaped block 31 is provided with three evenly distributed arc-shaped pads 32. When it is necessary to clamp the wire 4 on the conductive sheet 28, the wire 4 is inserted into the conductive sheet 28, so that the arc-shaped pads 32 in the cavity arc-shaped block 31 are pressed against the wire 4. The arc-shaped pad 32 is a rubber pad, so as to clamp the wire 4. One side of the arc-shaped pad 32 is fixedly connected with a round rod 33. The round rod 33 is slidably inserted into the cavity arc-shaped block 31. An arc-shaped plate 35 is fixedly connected between the two round rods 33. When the arc-shaped pad 32 is pressed, the round rod 33 slides. The middle round rod 33 is pressed, so that the arc-shaped plate 35 is pressed, so that the arc-shaped pads 32 on both sides further limit the wire 4. One end of the round rod 33 is fixedly connected with a spring four 34. The other end of the spring four 34 is fixed to the cavity arc-shaped block 31. By setting the spring four 34, the middle round rod 33 is reset.

[0033] Working principle:

[0034] When detecting the DC internal resistance of the lithium battery cell, start the battery internal resistance tester body 1, short-circuit and calibrate the internal resistance of the two wires 4, and then connect them to the conductive sheets 28 on both sides of the battery box respectively. Clamp the battery into the battery box so that the spring contacts the battery, so that the battery internal resistance tester body 1 can perform the detection. When it is necessary to adapt to a longer battery to measure the internal resistance of the cell, put the battery into the battery box one 21 and a pair of battery boxes two 22, so that according to the length of the battery, the circular rod 23 slides in the battery box two 22, and at the same time the spring one 24 is stretched, and then the battery is clamped into the battery box one 21 and a pair of battery boxes two 22. Then, the wire 4 is clamped onto the conductive sheet 28 on the connecting block 27, so that it is conducted through the spring two 29, which is convenient for detecting the internal resistance of the longer battery. By setting the square rod 25 and the spring three 26, a battery wider than the width between the battery box one 21 and a pair of battery boxes two 22 can be clamped. By setting the strap 210, the battery is fixed. By setting the magic tape one 211 and the magic tape two 212, the strap 210 is fixed. By setting multiple straps 210, the battery is further fixed. When it is necessary to clamp the wire 4 on the conductive sheet 28, the wire 4 is inserted into the conductive sheet 28, so that the arc-shaped pads 32 in the cavity arc-shaped block 31 are pressed against the wire 4. The arc-shaped pad 32 is a rubber pad, so as to clamp the wire 4. When the arc-shaped pad 32 is pressed, the round rod 33 slides. The middle round rod 33 is pressed, so that the arc-shaped plate 35 is pressed, so that the arc-shaped pads 32 on both sides further limit the wire 4. By setting the spring four 34, the middle round rod 33 is reset.

[0035] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present utility model, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model still belong to the protection scope of the technical solution of the present utility model. In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific situations.

Claims

1. A battery cell DC internal resistance detection device, comprising a battery internal resistance tester body (1), characterized in that: The positive and negative ends of the battery internal resistance tester body (1) are fixedly connected to a wire (4); a clamping assembly (3) and an adjustment assembly (2) are arranged on the right side of the wire (4); the adjustment assembly (2) comprises a pair of battery boxes (1) (21) and a pair of battery boxes (22); a round rod (23) is fixedly connected to the right end of the battery box (21); the round rod (23) is slidably inserted into the battery box (22); the other end of the round rod (23) is fixedly connected to a spring (24); the other end of the spring (24) is fixed to the battery box (22); a connecting block (27) is arranged between the two battery boxes (21) and the pair of battery boxes (22); a conductive sheet (28) is installed inside the connecting block (27); a spring (29) is fixedly connected to one side of the conductive sheet (28); the conductive sheet (28) and the wire (4) are clamped.

2. A battery core DC internal resistance detection device according to claim 1, characterized in that: A square rod (25) is slidably inserted between the two battery boxes (21) and the pair of battery boxes (22), the connecting block (27) slides on the surface of the square rod (25), and a spring (26) is fixedly connected between the battery box (21) and the pair of battery boxes (22) and the connecting block (27).

3. A battery core DC internal resistance detection device according to claim 2, characterized in that: The upper ends of the battery box one (21) and the pair of battery boxes two (22) on one side are fixedly connected with a binding strap (210), and the other end of the binding strap (210) passes through the battery box one (21) and the pair of battery boxes two (22) on the other side.

4. A battery core DC internal resistance detection device according to claim 3, characterized in that: The surface of the binding strap (210) is fixedly connected with a first Velcro (211) and a second Velcro (212), and the first Velcro (211) and the second Velcro (212) are adapted to each other.

5. A battery core DC internal resistance detection device according to claim 4, characterized in that: A plurality of the binding straps (210) are provided, and the plurality of the binding straps (210) are evenly distributed on the battery box one (21) and a pair of battery boxes two (22).

6. A battery core DC internal resistance detection device according to claim 5, characterized in that: The clamping assembly (3) comprises two evenly distributed cavity arc blocks (31) fixedly connected to one end of the conductive sheet (28), and the arc surface of the cavity arc block (31) is provided with three evenly distributed arc pads (32).

7. A battery core DC internal resistance detection device according to claim 6, characterized in that: A round rod (33) is fixedly connected to one side of the arc pad (32), the round rod (33) is slidably inserted into the cavity arc block (31), and an arc plate (35) is fixedly connected between the two round rods (33).

8. A battery core DC internal resistance detection device according to claim 7, characterized in that: One end of the round rod (33) is fixedly connected to a spring four (34), and the other end of the spring four (34) is fixed to the cavity arc block (31).

Images