Device for detecting direct-current internal resistance of energy storage battery in charging and discharging processes

Abstract

The utility model provides a device for detecting the DC internal resistance of an energy storage battery during charging and discharging, which relates to the field of battery detection and comprises a machine body, a vertical moving device is mounted at the top of the machine body, and a transverse moving device is mounted at the end of the vertical moving device. Two movable ends are arranged in the transverse moving device, movable frames of L-shaped structures are rotationally connected to the two movable ends in the transverse moving device, connecting columns are movably inserted into the side walls of the movable frames in a penetrating mode, probes are installed at the ends of the connecting columns, and movable parts are arranged on the outer surfaces of the connecting columns in a sleeving mode; according to the detection device for the direct current internal resistance of the energy storage battery in the charging and discharging process, the distance between the two probes is adaptively adjusted through the transverse moving device, when a square lithium battery or a soft package lithium battery is detected, the detection accuracy is improved, and the detection efficiency is improved. And the movable frame is rotated by 90 degrees.

Description

Technical Field

[0001] The utility model relates to the field of battery detection, in particular to a detection device for the DC internal resistance of an energy storage battery during the charging and discharging process. Background Art

[0002] Energy storage batteries are batteries that convert chemical energy into electrical energy and have energy storage functions. They can store electrical energy in the battery when charging, and then release the stored electrical energy when needed to meet power demand. Energy storage batteries have a wide range of applications in many fields, including but not limited to power system energy storage, transportation energy storage, distributed energy storage, and electronic equipment energy storage.

[0003] The detection device for the DC internal resistance of the energy storage battery during the charging and discharging process is a device specially designed to measure the DC internal resistance of the energy storage battery during the charging and discharging process. The existing detection device places the lithium battery between two probes when testing the battery, one of which is in a fixed state and the other is in an active state that is extended and retracted by a spring. One end of the battery is pressed against the end of the active probe, and then force is applied to the battery to move the active probe, and the distance between the two probes becomes larger. After the battery is placed between the two probes, the battery is installed between the two probes under the action of the spring, so that the battery is tested. When this device is in use, since the bracket supporting the two probes is fixed, the range of battery specifications used by this device is relatively small. In addition, there are many types of lithium batteries, including square lithium batteries, cylindrical lithium batteries, soft-pack lithium batteries and button lithium batteries. The detection device of this structure is generally only suitable for cylindrical lithium batteries, so there are certain limitations in its use.

[0004] Therefore, it is necessary to provide a new device for detecting the DC internal resistance of an energy storage battery during the charging and discharging process to solve the above technical problems. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a device for detecting the DC internal resistance of an energy storage battery during the charging and discharging process.

[0006] The utility model provides a detection device for the DC internal resistance of an energy storage battery during the charging and discharging process, comprising a body, a vertical moving device being installed on the top of the body, a lateral moving device being installed on the end of the vertical moving device, two movable ends being arranged in the lateral moving device, both movable ends in the lateral moving device being rotatably connected with a movable frame having an L-shaped structure, a connecting column being movably inserted on the side wall of the movable frame, a probe being installed on the end of the connecting column, a movable part being sleeved on the outer surface of the connecting column, and a limiting part for limiting the position of the movable part being installed on the movable part.

[0007] Preferably, the vertical moving device is an electric telescopic rod, which is fixedly mounted on the top of the machine body, and the telescopic end of the electric telescopic rod extends to the inside of the machine body, and the telescopic end of the electric telescopic rod is fixedly connected to the lateral moving device.

[0008] Preferably, the lateral moving device includes a moving frame with an inverted U-shaped structure, a movable rod and two moving plates. The top of the moving frame is fixedly connected to the telescopic end of the electric telescopic rod, and the movable rod is movably connected to the moving frame. Both ends of the movable rod are provided with threads with opposite thread directions. The two opposite threads of the movable rod are threadedly connected to the moving plates, and the bottom end of the moving plate is rotatably connected to the movable frame.

[0009] Preferably, guide rods are provided on both sides of the movable rod, both ends of the guide rods are respectively fixedly connected to two opposite side walls of the movable frame, and the two guide rods are respectively movably inserted into two through holes opened in the movable plate.

[0010] Preferably, the movable part includes a fixing ring and a spring, the fixing ring is sleeved on the connecting column, the fixing ring is fixedly connected to the connecting column, the spring is movably sleeved on the connecting column, and both ends of the spring are respectively fixedly connected to the fixing ring and the side wall of the movable frame.

[0011] Preferably, the limiting member includes an outer ring and a threaded ring, the outer ring is sleeved on the outer surface of the fixed ring, the outer ring is movably connected to the fixed ring, the threaded ring is fixedly connected to the side wall of the movable frame, and the outer surface of the outer ring is threadedly connected to the inner wall of the threaded ring.

[0012] Preferably, a placement hole is provided on the movable plate, a threaded rod is threadedly connected to a side wall of the placement hole, and two adjacent side walls of the movable frame are provided with grooves for the ends of the threaded rod to move into.

[0013] Compared with the related art, the device for detecting the DC internal resistance of the energy storage battery during the charging and discharging process provided by the utility model has the following beneficial effects:

[0014] When testing cylindrical lithium batteries or button lithium batteries, the distance between the two probes is adaptively adjusted through the lateral moving device according to the specifications of the battery to be tested. Then, the movable part is rotated through the limiter. At this time, one of the probes is limited and cannot be moved. When installing cylindrical lithium batteries or button lithium batteries, the battery installation can be completed by squeezing the active probe. When testing square lithium batteries or soft-pack lithium batteries, the movable frame is rotated 90 degrees. At this time, the distance between the two probes is adaptively adjusted according to the specifications of the battery to be tested. After the adjustment is completed, the two downward probes are driven downward by the vertical moving device, and the two probes are respectively in contact with the positive and negative electrodes of the square lithium battery or soft-pack lithium battery to achieve detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of a device for detecting the DC internal resistance of an energy storage battery during charging and discharging provided by the utility model;

[0016] Figure 2 for Figure 1 The schematic cross-sectional view of the structure shown;

[0017] Figure 3 for Figure 2 The structural schematic diagram of A shown;

[0018] Figure 4 for Figure 1 The local structural schematic diagram shown;

[0019] Figure 5 for Figure 4 A schematic diagram of the decomposed structure of the structure shown.

[0020] Numbers in the figure: 1, machine body; 2, movable frame; 3, probe; 4, electric telescopic rod; 5, movable frame; 6, movable rod; 7, guide rod; 8, movable plate; 9, placement hole; 10, threaded rod; 11, fixing ring; 12, spring; 13, outer ring; 14, threaded ring; 15, connecting column. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0022] Please refer to Figure 1-Figure 5 ,in, Figure 1 A schematic diagram of the structure of a device for detecting the DC internal resistance of an energy storage battery during charging and discharging provided by the utility model; Figure 2 for Figure 1 The schematic cross-sectional view of the structure shown; Figure 3 for Figure 2 The structural schematic diagram of A shown; Figure 4 for Figure 1 The local structural schematic diagram shown; Figure 5 for Figure 4 A schematic diagram of the decomposed structure of the structure shown.

[0023] In the specific implementation process, Figure 1-Figure 5 As shown, it includes a body 1, a vertical moving device is installed on the top of the body 1, a lateral moving device is installed at the end of the vertical moving device, and two movable ends are arranged in the lateral moving device, and the two movable ends in the lateral moving device are rotatably connected with a movable frame 2 with an L-shaped structure, and a connecting column 15 is movably inserted on the side wall of the movable frame 2, and a probe 3 is installed at the end of the connecting column 15, and a movable part is sleeved on the outer surface of the connecting column 15, and a limiting part for limiting the movable part is installed on the movable part. According to the specifications of the battery to be detected, the distance between the two probes 3 is adaptively adjusted through the lateral moving device, and then, The movable part is rotated by the limiting part. At this time, one of the probes 3 is limited and cannot be moved. When installing a cylindrical lithium battery or a button lithium battery, the battery installation work can be completed by squeezing the active probe 3. When testing a square lithium battery or a soft-pack lithium battery, the movable frame 2 is rotated 90 degrees. At this time, the distance between the two probes 3 is adaptively adjusted according to the specifications of the battery to be tested. After the adjustment is completed, the two downward probes 3 are driven downward by the vertical moving device, and the two probes 3 are respectively in contact with the positive and negative electrodes of the square lithium battery or the soft-pack lithium battery to achieve detection;

[0024] The vertical moving device is an electric telescopic rod 4, which is fixedly installed on the top of the machine body 1, and the telescopic end of the electric telescopic rod 4 extends to the inside of the machine body 1, and the telescopic end of the electric telescopic rod 4 is fixedly connected to the lateral moving device, and the lateral moving device includes a mobile frame 5 with an inverted U-shaped structure, a movable rod 6 and two movable plates 8, the top of the mobile frame 5 is fixedly connected to the telescopic end of the electric telescopic rod 4, the movable rod 6 is movably connected to the mobile frame 5, and threads with opposite thread directions are provided at both ends of the movable rod 6, and the two opposite threads of the movable rod 6 are both threadedly connected to the movable plate 8, and the bottom of the movable plate 8 is connected to the movable plate 8. The movable frame 2 is rotatably connected, a placement hole 9 is provided on the movable plate 8, a threaded rod 10 is threadedly connected on the side wall of the placement hole 9, and grooves for the ends of the threaded rod 10 to move in are provided on the two adjacent side walls of the movable frame 2. Guide rods 7 are provided on both sides of the movable rod 6, and the two ends of the guide rod 7 are respectively fixedly connected to the two opposite side walls of the movable frame 5, and the two guide rods 7 are respectively movably inserted into the two through holes provided on the movable plate 8. The movable rod 6 is rotated, and the movable rod 6 drives the two movable plates 8 to move, so that the spacing between the two probes 3 can be adjusted, and the two probes 3 are driven to move downward by the electric cylinder;

[0025] The movable part includes a fixed ring 11 and a spring 12. The fixed ring 11 is sleeved on the connecting column 15. The fixed ring 11 is fixedly connected to the connecting column 15. The spring 12 is movably sleeved on the connecting column 15. The two ends of the spring 12 are respectively fixedly connected to the fixed ring 11 and the side wall of the movable frame 2. The limiting part includes an outer ring 13 and a threaded ring 14. The outer ring 13 is sleeved on the outer surface of the fixed ring 11. The outer ring 13 is movably connected to the fixed ring 11. The threaded ring 14 is fixedly connected to the side wall of the movable frame 2. The outer surface of the outer ring 13 is threadedly connected to the inner wall of the threaded ring 14. The outer ring 13 on one of the movable plates 8 can be rotated so that the outer ring 13 and the threaded ring 14 are threadedly connected together. At this time, one of the probes 3 is limited and cannot be moved. When installing a cylindrical lithium battery or a button lithium battery, the probe 3 in the active state can be squeezed to complete the battery installation.

[0026] The working principle provided by the utility model is as follows: when the device is used, the connecting column 15 is plugged into the detection machine through a wire. When a cylindrical lithium battery or a button lithium battery is detected, the distance between the two probes 3 is adaptively adjusted according to the specifications of the battery to be detected, and the movable rod 6 is rotated. The movable rod 6 drives the two movable plates 8 to move, and the distance between the two probes 3 is adjusted. Then, the outer ring 13 on one of the movable plates 8 can be rotated so that the outer ring 13 is threadedly connected with the threaded ring 14. At this time, one of the probes 3 is limited and cannot be moved. When installing a cylindrical lithium battery or a button lithium battery, squeeze The probe 3 in the active state can complete the battery installation work under the action of the stretched spring 12. When testing the square lithium battery or the soft-pack lithium battery, rotate the threaded rod 10 so that the end of the threaded rod 10 moves out of the groove of the movable frame 2, rotate the movable frame 2 90 degrees, and rotate the threaded rod 10 in the opposite direction so that the end of the threaded rod 10 moves into another groove of the movable frame 2. At this time, the distance between the two probes 3 is adaptively adjusted according to the specifications of the battery to be tested. After the adjustment is completed, the two downward probes 3 are driven downward by the electric cylinder, and the two probes 3 are respectively in contact with the positive and negative electrodes of the square lithium battery or the soft-pack lithium battery to achieve detection.

[0027] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0028] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A device for detecting the DC internal resistance of an energy storage battery during charging and discharging, characterized in that: The invention comprises a machine body (1), wherein a vertical moving device is installed on the top of the machine body (1), a horizontal moving device is installed at the end of the vertical moving device, two movable ends are arranged in the horizontal moving device, and both movable ends in the horizontal moving device are rotatably connected to a movable frame (2) with an L-shaped structure, a connecting column (15) is movably inserted on the side wall of the movable frame (2), a probe (3) is installed at the end of the connecting column (15), and a movable part is sleeved on the outer surface of the connecting column (15), and a limiting part for limiting the movable part is installed on the movable part.

2. The device for detecting the DC internal resistance of the energy storage battery during charging and discharging according to claim 1, characterized in that: The vertical moving device is an electric telescopic rod (4), which is fixedly mounted on the top of the machine body (1), and the telescopic end of the electric telescopic rod (4) extends to the inside of the machine body (1), and the telescopic end of the electric telescopic rod (4) is fixedly connected to the horizontal moving device.

3. The device for detecting the DC internal resistance of the energy storage battery during charging and discharging according to claim 2, characterized in that: The transverse moving device comprises a moving frame (5) in an inverted U-shaped structure, a movable rod (6) and two moving plates (8); the top of the moving frame (5) is fixedly connected to the telescopic end of the electric telescopic rod (4); the movable rod (6) is movably connected to the moving frame (5); both ends of the movable rod (6) are provided with threads with opposite thread directions; the two opposite threads of the movable rod (6) are both threadedly connected to the moving plates (8); and the bottom end of the moving plates (8) is rotatably connected to the moving frame (2).

4. The device for detecting the DC internal resistance of the energy storage battery during charging and discharging according to claim 3, characterized in that: Guide rods (7) are provided on both sides of the movable rod (6), and the two ends of the guide rods (7) are respectively fixedly connected to two opposite side walls of the movable frame (5), and the two guide rods (7) are respectively movably inserted into two through holes provided in the movable plate (8).

5. The device for detecting the DC internal resistance of the energy storage battery during the charging and discharging process according to claim 4, characterized in that: The movable part comprises a fixing ring (11) and a spring (12); the fixing ring (11) is sleeved on the connecting column (15); the fixing ring (11) and the connecting column (15) are fixedly connected; the spring (12) is movably sleeved on the connecting column (15); and two ends of the spring (12) are respectively fixedly connected to the fixing ring (11) and the side wall of the movable frame (2).

6. The device for detecting the DC internal resistance of the energy storage battery during the charging and discharging process according to claim 5, characterized in that: The limiting member comprises an outer ring (13) and a threaded ring (14); the outer ring (13) is sleeved on the outer surface of the fixing ring (11); the outer ring (13) is movably connected to the fixing ring (11); the threaded ring (14) is fixedly connected to the side wall of the movable frame (2); and the outer surface of the outer ring (13) is threadedly connected to the inner wall of the threaded ring (14).

7. The device for detecting the DC internal resistance of the energy storage battery during the charging and discharging process according to claim 6, characterized in that: The movable plate (8) is provided with a placement hole (9), a threaded rod (10) is threadedly connected to the side wall of the placement hole (9), and two adjacent side walls of the movable frame (2) are provided with grooves for the ends of the threaded rod (10) to move into.

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