Charging and discharging test fixture for square retired single power battery

Abstract

The utility model is suitable for the technical field of battery testing, and provides a charging and discharging test fixture for a square retired single power battery, which comprises a base, a top plate arranged on the upper side of the base, an elastic component arranged between the base and the top plate, and a square battery arranged between the base and the top plate and used for detection. The top plate is provided with two movable through grooves which respectively extend out of the upper side surface and the lower side surface of the top plate, the movable through grooves are internally provided with movable plates, and the movable plates are provided with ejector pin type locking knobs which tightly abut against the square batteries. Therefore, an oxide layer on the surface of an electrode of the square battery can be effectively punctured, effective contact points with the electrode of the square battery are ensured, the contact reliability is improved, the ejector pins are connected with the connector in parallel, test current can be stably provided for the square battery, and the stability of detection of the square retired battery is ensured.

Description

Technical Field

[0001] This utility model relates to the field of battery testing technology, and more specifically, it relates to a charge and discharge test fixture for a square retired power battery cell. Background Technology

[0002] With the rapid development of the new energy vehicle industry, the large-scale retirement of power batteries has become a significant issue facing the industry. After being used in vehicles, retired power batteries typically experience varying degrees of capacity and performance degradation, but they can still be reused in energy storage, low-speed electric vehicles, and other fields. However, retired batteries must undergo rigorous charge-discharge tests before reuse to assess key parameters such as remaining capacity, internal resistance, and cycle life.

[0003] Currently, the charge / discharge test fixtures for square power batteries on the market are mainly designed for new batteries. Their structure and function are difficult to meet the testing needs of retired batteries, mainly in the following aspects: First, retired power batteries come from a wide range of sources, possibly from different brands and models of new energy vehicles, resulting in significant differences in their external dimensions (length, width, and height). For example, the length of a common square retired battery may be between 100mm and 200mm, the height between 50mm and 200mm, and the thickness between 20mm and 80mm. Second, newly manufactured square power batteries usually have threaded holes or welded connecting pieces on the electrodes (positive and negative terminals) to facilitate fixing with bolts or clamps during testing. However, during the disassembly process of retired batteries, the electrodes are often milled or ground flat, making their surfaces flat without any protruding structures. This makes traditional bolt crimping, spring clamping, and other methods unreliable for connection, causing abnormalities in the charge / discharge testing of square batteries.

[0004] Therefore, there is an urgent need to develop a charging and discharging test fixture for retired power batteries that is highly compatible, has reliable connections, and supports high-current testing, in order to meet the industry's demand for efficient and safe testing of retired battery cells. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a charge and discharge test fixture for square retired power battery cells that can effectively pierce the oxide layer on the electrode surface of square batteries, while ensuring effective contact points with the square battery electrodes and improving the reliability of contact.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A charge / discharge test fixture for a square retired power battery cell includes a base, a top plate on the upper side of the base, an elastic component between the base and the top plate, a square battery for testing placed between the base and the top plate, and two movable slots extending from the upper and lower surfaces of the top plate. Movable plates are provided in the movable slots, and pin-type locking knobs for tightening the square battery are provided on the movable plates.

[0008] The present invention is further configured such that: the pin-type locking knob includes a screw, the screw is threaded onto a movable plate, the lower surface of the screw is provided with a plurality of pins arranged in a matrix, the lower end of the pins extends into a movable through groove and contacts the positive and negative terminals of a square battery, and the upper surface of the screw is provided with a connector electrically connected to the plurality of pins.

[0009] The present invention is further configured such that: both the ejector pin and the connector are made of conductive material, and the screw is made of insulating material.

[0010] The present invention is further configured such that: the elastic component includes a bottom shell, the bottom shell is disposed on the upper surface of the base, a movable slide rod is disposed on the lower surface of the top plate, the lower end of the movable slide rod slides through into the bottom shell, an internal baffle that slides inside the bottom shell is disposed at one end of the movable slide rod located inside the bottom shell, and a spring that is movably sleeved on the outer surface of the movable slide rod is disposed between the upper surface of the internal baffle and the top wall of the bottom shell.

[0011] The present invention is further configured such that: guide rails are provided on the inner walls of both the front and rear sides of the movable through groove, and a guide rail connector is embedded on the side of the movable plate near the guide rail, and the movable plate is slidably connected to the guide rail through the guide rail connector.

[0012] The present invention is further configured such that a screw handle for turning is fitted on the outer surface of the upper end of the screw.

[0013] The advantages of this utility model are:

[0014] Firstly, this utility model uses a pin-type locking knob. Because the pin-type locking knob uses a matrix arrangement of pins, it can effectively pierce the oxide layer on the electrode surface of the square battery, while also ensuring an effective contact point with the square battery electrode, thus improving the reliability of the contact. Furthermore, the multiple pins are connected to the connector in parallel, which can stably provide test current to the square battery, ensuring the stability of the testing of retired square batteries.

[0015] Secondly, this utility model is applicable to square batteries with different X and Y dimensions and different thicknesses of positive and negative electrodes, further improving the effectiveness of the test fixture. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the structure of a charge / discharge test fixture for a square retired power battery cell according to this utility model;

[0017] Figure 2 This is a schematic diagram of the square battery of this utility model;

[0018] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0019] Figure 4 This is a schematic diagram of the pin-type locking knob of this utility model;

[0020] Figure 5 This is a cross-sectional schematic diagram of the bottom shell of this utility model.

[0021] In the diagram: 1. Base; 2. Top plate; 3. Elastic component; 31. Bottom shell; 32. Movable slide bar; 33. Internal baffle; 34. Spring;

[0022] 4. Square battery; 5. Movable through slot; 6. Movable plate; 7. Guide rail; 8. Guide rail connector;

[0023] 9. Pin-type locking knob; 91. Screw; 92. Pin; 93. Turning handle; 94. Connector. Detailed Implementation

[0024] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] Please see Figure 1-5 The present invention provides the following technical solution:

[0027] Specifically, it refers to a charge and discharge test fixture for a square retired power battery cell, including a base 1, a top plate 2 on the upper side of the base 1, an elastic component 3 between the base 1 and the top plate 2, a square battery 4 for testing placed between the base 1 and the top plate 2, two movable through slots 5 extending from the upper and lower surfaces of the top plate 2 respectively, a movable plate 6 in the movable through slots 5, and a pin-type locking knob 9 for pressing the square battery 4 on the movable plate 6.

[0028] In use, the square battery 4 is placed between the base 1 and the top plate 2. Under the action of the elastic component 3, the base 1 and the top plate 2 lock the square battery 4 in place, and the two pin-type locking knobs 9 contact the positive and negative terminals of the square battery 4 respectively.

[0029] The pin-type locking knob 9 includes a screw 91, which is threaded onto the movable plate 6. The lower surface of the screw 91 is provided with a plurality of pins 92 arranged in a matrix. The lower end of the pins 92 extends into a movable through groove 5 and contacts the positive and negative electrodes of the square battery 4. The upper surface of the screw 91 is provided with a connector 94 that is electrically connected to the plurality of pins 92. When the pin-type locking knob 9 is tightened, the plurality of pins 92 can effectively pierce the oxide layer on the electrode surface of the square battery 4, ensuring reliable contact. At the same time, the plurality of pins 92 are arranged in a matrix.

[0030] In use, it is connected to the charging and discharging equipment through the connector 94. When the pin 92 presses against the electrode of the square battery 4, the charging and discharging equipment is activated. In this way, the square battery 4 can be charged and discharged through the pin 92. Since the multiple pins 92 are connected in parallel with the connector 94, the test current can be stably provided to the square battery 4, ensuring the stability of the test of the square retired battery.

[0031] In this design, the ejector pin 92 and connector 94 are both made of conductive material, while the screw 91 is made of insulating material, which prevents leakage during the operation of the charging and discharging equipment and ensures the safety of the test fixture.

[0032] The elastic component 3 includes a bottom shell 31, which is disposed on the upper surface of the base 1. A movable slide rod 32 is disposed on the lower surface of the top plate 2. The lower end of the movable slide rod 32 slides through into the bottom shell 31. An internal baffle 33 is disposed at one end of the movable slide rod 32 located inside the bottom shell 31, which slides inside the bottom shell 31. A spring 34 is disposed between the upper surface of the internal baffle 33 and the top wall of the bottom shell 31, which is movably sleeved on the outer surface of the movable slide rod 32.

[0033] When in use, pull the top plate 2 upward. At this time, the movable slide bar 32 exerts an upward pulling force on the inner baffle 33, causing the inner baffle 33 to move upward. At the same time, the spring 34 is stressed and contracts. Then, place the square battery 4 on the base 1. After placement, release the top plate 2. At this time, the spring 34 releases the thrust, causing the top plate 2 to move to one side of the square battery 4. This allows the pin-type locking knob 9 to press against the positive and negative terminals of the square battery 4, which can accommodate batteries of different Y-axis sizes. It also improves the stability of battery clamping and prevents tipping. In addition, the spring 34 can provide a constant contact pressure of 30-50N to the positive and negative terminals of the square battery 4.

[0034] Guide rails 7 are provided on the inner walls of both the front and rear sides of the movable through slot 5. A guide rail connector 8 is embedded on the side of the movable plate 6 near the guide rail 7. The movable plate 6 is slidably connected to the guide rail 7 through the guide rail connector 8. In use, the movable plate 6 can move laterally in the movable through slot 5, so the X-direction position of the pin-type locking knob 9 can be adjusted, making the test fixture suitable for clamping different square batteries in the X-direction.

[0035] A screw handle 93 for turning is fitted on the outer surface of the upper end of the screw 91. By turning the screw 91 by turning the handle 93, the vertical position of the screw 91 on the movable plate 6 can be adjusted. Therefore, the length of the extended pin 92 can be adjusted to adapt to positive and negative poles of different thicknesses, which further improves the effectiveness of the test fixture.

[0036] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A square retired power battery monomer charge-discharge test fixture, comprising a base (1), characterized in that: The upper side of the base (1) is provided with a top plate (2), the base (1) and the top plate (2) are provided with an elastic assembly (3), the base (1) and the top plate (2) are placed with a square battery (4) for detection, the top plate (2) is provided with two movable through slots (5) extending out of the upper and lower side surfaces, the movable through slot (5) is provided with a movable plate (6), the movable plate (6) is provided with a thimble type locking knob (9) for pressing the square battery (4).

2. The square-shaped retired power battery cell charge-discharge test fixture according to claim 1, characterized in that: The thimble type locking knob (9) comprises a screw rod (91), the screw rod (91) is threadedly sleeved on the movable plate (6), the lower surface of the screw rod (91) is provided with a plurality of thimbles (92) arranged in a matrix, the lower end of the thimble (92) extends out of the movable through slot (5) and contacts the positive and negative poles of the square battery (4), and the upper surface of the screw rod (91) is provided with a connector (94) electrically connected with the plurality of thimbles (92).

3. The square-shaped retired power battery cell charge-discharge test fixture of claim 2, wherein: The thimble (92) and the connector (94) are made of conductive material, and the screw rod (91) is made of insulating material.

4. The square-shaped retired power battery cell charge-discharge test fixture of claim 1, wherein: The elastic assembly (3) comprises a bottom shell (31), the bottom shell (31) is arranged on the upper surface of the base (1), the lower surface of the top plate (2) is provided with a movable sliding rod (32), the lower end of the movable sliding rod (32) is slidably penetrated into the bottom shell (31), and one end of the movable sliding rod (32) in the bottom shell (31) is provided with an inner baffle (33) sliding in the bottom shell (31).

5. The square-shaped retired power battery cell charge-discharge test fixture of claim 4, wherein: The upper surface of the inner baffle (33) and the top wall of the bottom shell (31) are provided with a spring (34) movably sleeved on the outer surface of the movable sliding rod (32).

6. The square-shaped retired power battery cell charge-discharge test fixture of claim 3, wherein: The front and rear inner walls of the movable through slot (5) are provided with guide rails (7), and the side of the movable plate (6) close to the guide rail (7) is embedded with a guide rail connector (8), and the movable plate (6) is slidably connected with the guide rail (7) through the guide rail connector (8).

7. The square-shaped retired power battery cell charge-discharge test fixture of claim 6, wherein: The outer surface of the upper end of the screw rod (91) is sleeved with a twisting handle (93) for twisting.

Images