Multifunctional battery cell test tool

Abstract

The utility model discloses a multifunctional battery cell test tool, which comprises a supporting plate, a mounting frame and a stand column are arranged on the supporting plate, a plurality of pressing plates are arranged in the mounting frame in a sliding manner, each pressing plate is provided with a displacement sensor, each pressing plate is further provided with an adjusting groove, a limiting block is arranged on each adjusting groove, and the stand column is positioned on one side of the mounting frame. An electric push rod is fixedly arranged on the stand column, a probe assembly is arranged at the output end of the electric push rod, a controller is further arranged on the mounting frame, and the controller is electrically connected with the probe assembly, the electric push rod and the displacement sensor. The two adjusting grooves which are perpendicular to each other are formed in the pressing plate, and two limiting blocks are mounted on each adjusting groove, so that the battery cells with different sizes can be fixed, and the application range is wider; according to the utility model, through the stacking of the plurality of pressing plates, the swelling amount of the battery cell during charging and discharging under different pressure conditions can be monitored synchronously, and the detection efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery core detection equipment, in particular to a multifunctional battery core testing tool. Background Art

[0002] Power batteries are the main power source for new energy vehicles at present, and battery cells are the key components of power batteries, which are responsible for storing and releasing electrical energy. Power batteries are usually composed of multiple battery cells connected in series or in parallel to meet the voltage and capacity requirements of specific applications. The performance of the battery cell directly affects the performance of the entire battery pack, including its energy density, cycle life, safety and cost, so the quality of the power battery is closely related to the quality of the battery cell. The battery cell will be quality tested after production, and during the test, a certain clamping force needs to be applied to the battery cell. In the prior art, when the battery cell is charged and discharged, it is necessary to weld connectors on the positive and negative electrodes of the battery cell, resulting in low detection efficiency; after the test is completed, the connector needs to be removed from the electrode of the battery cell, which will cause damage to the electrode of the battery cell; because the battery cell will expand during the charging process, it is difficult for existing equipment to synchronously detect the expansion amount of the battery cell under different pressures when charging and discharging.

[0003] Therefore, we need to design a multifunctional battery cell testing tool to solve these problems. Utility Model Content

[0004] The problem to be solved by the utility model is to provide a multifunctional battery core testing tool, which can repeatedly charge and discharge the battery core without welding.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A multifunctional battery cell testing tool comprises a support plate, a mounting frame and a column are arranged on the support plate, a plurality of pressure plates are slidably arranged in the mounting frame, each of the pressure plates is provided with a displacement sensor, an adjustment slot is also arranged on the pressure plate, a limit block is arranged on the adjustment slot, the column is located at one side of the mounting frame, an electric push rod is fixedly arranged on the column, a probe assembly is arranged at the output end of the electric push rod, a controller is also arranged on the mounting frame, and the controller is electrically connected to the probe assembly, the electric push rod and the displacement sensor respectively.

[0007] Preferably, the probe assembly includes a mounting plate, an insulating block, a detection probe, a spring and a wiring terminal. The mounting plate is fixed to the output end of the electric push rod, the insulating block is arranged on the mounting plate, the detection probe is penetrated and arranged on the insulating block, the wiring terminal is installed at one end of the detection probe through a nut, and a contact is fixedly arranged at the other end of the probe, and the spring is sleeved on the detection probe between the contact and the insulating block.

[0008] Such an arrangement can not only ensure that the contact can fit closely with the electrode to reduce the resistance, but also prevent the detection probe from damaging the electrode when pushed by the electric push rod.

[0009] Preferably, a set of relative inner walls of the installation frame are fixedly provided with slide rails, a slider is slidably provided on the slide rails, and the pressure plate is slidably provided on the installation frame via the slider.

[0010] Such an arrangement can ensure that the pressure plate can slide up and down along the installation frame, thereby reducing friction.

[0011] Preferably, insulating plates are fitted on both the top and bottom surfaces of the pressing plate.

[0012] Such a setting can prevent the battery cell from being damaged due to excessive pressure, causing a short circuit and thus a fire.

[0013] Preferably, a C-shaped groove is fixedly provided in each of the adjustment grooves, and a T-shaped bolt is provided on the C-shaped groove.

[0014] Such an arrangement can fix the limit block without affecting the sliding of the limit block on the adjustment slot.

[0015] Preferably, the adjustment slot includes a first adjustment slot and a second adjustment slot, the first adjustment slot and the second adjustment slot are perpendicular to each other, the limit block includes a first limit block and a second limit block, and there are two of the first limit block and the second limit block respectively, the two first limit blocks are arranged on the first adjustment slot through the T-bolt and the C-slot, and the two second limit blocks are arranged on the second adjustment slot through the T-bolt and the C-slot.

[0016] With such arrangement, the two adjustment slots can cooperate with the two limit blocks on each adjustment slot to fix the battery cell in multiple directions, thereby preventing the battery cell from moving.

[0017] Preferably, a start button is also provided on the column, and the start button is electrically connected to the controller.

[0018] Such setting makes it easy to control the equipment and the operation is simple and convenient.

[0019] The advantages and positive effects of the utility model are:

[0020] The utility model can fix cells of different sizes by arranging two mutually perpendicular adjustment grooves on the pressure plate and installing two limit blocks on each adjustment groove, and has a wider application range.

[0021] The utility model installs a detection probe on an insulating block through a spring at the output end of an electric push rod, and uses the electric push rod to push the detection probe to repeatedly contact the electrode of the battery cell, thereby realizing repeated charging and discharging operations on the battery cell, optimizing the welding connection method in the prior art, improving the detection efficiency, and at the same time not causing damage to the electrode of the battery cell;

[0022] The utility model can synchronously monitor the expansion amount of the battery cell during charging and discharging under different pressure conditions by stacking a plurality of pressure plates, thereby improving the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 It is an axonometric schematic diagram of the overall structure of the utility model;

[0025] Figure 2 This is a schematic diagram of the installation position of the displacement sensor of the utility model;

[0026] Figure 3 This is a schematic diagram of the installation structure of the pressing plate and the battery cell of the utility model;

[0027] Figure 4 This is a schematic diagram of the installation structure of the installation plate, the insulating block and the detection probe of the utility model;

[0028] Figure 5 It is a schematic diagram of the position structure of the first adjustment slot, the second adjustment slot, the first limit block and the second limit block of the utility model;

[0029] Figure 6 This is a schematic diagram of the arrangement structure of the first adjustment slot and the second adjustment slot of the utility model. Figure 1 ;

[0030] Figure 7 This is a schematic diagram of the arrangement structure of the first adjustment slot and the second adjustment slot of the utility model. Figure 2 ;

[0031] Figure 8 It is a schematic diagram of the C-shaped groove and T-shaped bolt assembly structure of the utility model;

[0032] Fig. 9 This is a schematic diagram of the installation structure of the mounting plate and the electric push rod of the utility model;

[0033] Fig.10 yes Figure 3 A schematic diagram of the enlarged structure in FIG.

[0034] The following are the descriptions of the reference numerals:

[0035] 1. Support plate; 2. Pressure plate; 3. Slider; 4. Slide rail; 5. Mounting frame; 6. Insulating plate; 7. First limit block; 8. Probe assembly; 801. Mounting plate; 802. Insulating block; 803. Detection probe; 804. Spring; 805. Terminal block; 806. Nut; 807. Contact; 9. Controller; 10. Electric push rod; 11. Start button; 12. Displacement sensor; 13. Second adjustment slot; 14. T-bolt; 15. First adjustment slot; 16. Second limit block; 17. Battery cell; 18. C-slot; 19. Column. DETAILED DESCRIPTION

[0036] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0037] In the description of the present invention, 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 a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0038] The utility model is further described below in conjunction with the accompanying drawings:

[0039] Example 1: Figure 1-Figure 9As shown, a multifunctional battery cell testing tool includes a support plate 1, characterized in that: a mounting frame 5 and a column 19 are arranged on the support plate 1, a plurality of pressure plates 2 are slidably arranged in the mounting frame 5, each pressure plate 2 is provided with a displacement sensor 12, an adjustment groove is also arranged on the pressure plate 2, a limit block is arranged on the adjustment groove, the column 19 is located at one side of the mounting frame 5, an electric push rod 10 is fixedly arranged on the column 19, a probe assembly 8 is arranged at the output end of the electric push rod 10, a controller 9 is also arranged on the mounting frame 5, and the controller 9 is electrically connected to the probe assembly 8, the electric push rod 10 and the displacement sensor 12 respectively.

[0040] like Figure 4 and Fig. 9 As shown, the probe assembly 8 includes a mounting plate 801, an insulating block 802, a detection probe 803, a spring 804 and a terminal 805. The mounting plate 801 is fixed to the output end of the electric push rod 10, the insulating block 802 is arranged on the mounting plate 801, the detection probe 803 is penetrated and arranged on the insulating block 802, the terminal 805 is installed on one end of the detection probe 803 through a nut 806, and a copper contact 807 is fixedly provided at the other end of the probe. The spring 804 is sleeved on the detection probe 803 between the contact 807 and the insulating block 802. Such a setting can ensure that the contact 807 can fit tightly with the electrode to reduce the resistance, and can also prevent the detection probe 803 from damaging the electrode when pushed by the electric push rod 10.

[0041] like Figure 1 As shown, a set of relative inner walls of the mounting frame 5 are fixedly provided with slide rails 4, a slider 3 is slidably provided on the slide rails 4, and the pressure plate 2 is slidably provided on the mounting frame 5 through the slider 3. Such a setting can ensure that the pressure plate 2 can slide up and down along the mounting frame 5, thereby reducing friction.

[0042] like Figure 1 , Figure 3 and Figure 5 As shown, insulating plates 6 are fitted on the top and bottom surfaces of the pressing plate 2. Such a configuration can prevent the battery cells 17 from being damaged due to excessive pressure and causing a short circuit and a fire.

[0043] like Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, a C-shaped groove 18 is fixedly provided in the adjusting groove, and a T-shaped bolt 14 is provided on the C-shaped groove 18. Such a configuration can fix the limit block without affecting the sliding of the limit block on the adjusting groove.

[0044] Specifically, the adjustment groove includes a first adjustment groove 15 and a second adjustment groove 13, the first adjustment groove 15 and the second adjustment groove 13 are perpendicular to each other, the limit block includes a first limit block 7 and a second limit block 16, and there are two first limit blocks 7 and two second limit blocks 16 respectively, the two first limit blocks 7 are arranged on the first adjustment groove 15 through T-bolts 14 and C-slots 18, and the two second limit blocks 16 are arranged on the second adjustment groove 13 through T-bolts 14 and C-slots 18. Such an arrangement can fix the battery cell 17 in multiple directions through the cooperation of the two adjustment grooves and the two limit blocks on each adjustment groove to prevent the battery cell 17 from moving.

[0045] like Figure 1 As shown, a start button 11 is also provided on the column 19, and the start button 11 is electrically connected to the controller 9. Such a setting is convenient for controlling the device, and the operation is simple and convenient.

[0046] The working process of this embodiment is as follows: before testing, first loosen the T-bolt 14, then move the two first limit blocks 7 on the first adjustment groove 15 toward each other, move the two second limit blocks 16 on the second adjustment groove 13 toward each other, and then place the battery cell 17 to be tested between the two first limit blocks 7 and the two second limit blocks 16, then push the two first limit blocks 7 to make the two first limit blocks 7 move relatively until they contact the battery cell 17, then fix the two first limit blocks 7 on the first adjustment groove 15 through the T-bolt 14, and then push the two second limit blocks 16 relatively to make the two second limit blocks 16 drive the T-bolt 14 along the second adjustment groove 13. The groove 13 moves until the two second limit blocks 16 are in contact with the battery cell 17, and then the second limit block 16 is fixed to the second adjustment groove 13 by the T-bolt 14, and the battery cell 17 is fixed by the two first limit blocks 7 and the two second limit blocks 16, and then the pressure plate 2 that fixes the battery cell 17 is fixed to the slider 3 on the slide rail 4 in the installation frame 5, and multiple pressure plates 2 are stacked from bottom to top. At this time, the battery cell 17 at the bottom will bear the weight of all pressure plates 2 and battery cells 17, and the pressure borne by the battery cell 17 from bottom to top will reduce the weight of one pressure plate 2 one by one, and the battery cell 17 at the top will only bear the weight of one pressure plate 2.

[0047] It should be noted that when the battery cell 17 is fixed, the electrode of the battery cell 17 needs to be aligned with the detection probe 803 on the probe assembly 8, so as to ensure that the electric push rod 10 can push the detection probe 803 to contact the electrode on the battery cell 17 after extension.

[0048] In this embodiment, taking six pressure plates 2 as an example, the design weight of each pressure plate 2 is 50Kg, and the weight of the battery cell 17 is about 3Kg. Then the battery cell 17 at the bottom will be subjected to a pressure of 315Kg, while the battery cell 17 at the top will only be subjected to a pressure of 50Kg. The weight of each pressure plate 2 reduced above the battery cell 17 will be reduced by 50Kg, and the weight of each battery cell 17 reduced by 3Kg. In this way, the expansion of the battery cell 17 during charging and discharging under 6 different pressures can be detected at the same time.

[0049] After all the battery cells 17 and the pressure plate 2 are installed in the installation frame 5, a signal is sent to the controller 9 by pressing the start button 11 on the column 19, and the controller 9 controls the extension and contraction of the electric push rod 10. When the electric push rod 10 is extended, it will push the mounting plate 801 and the insulating block 802 to approach the battery cell 17. When the insulating block 802 continues to approach the battery cell 17, the contact 807 at the end of the detection probe 803 will contact the electrode on the battery cell 17, and the current will flow through the detection probe 803 through the terminal 805 and enter the battery cell 17 from the electrode to charge the battery cell 17; the material of the detection probe 803 is copper, because copper has a small resistance, but generally the resistance of the contact surface of two conductors in contact with each other is generally relatively large. Therefore, in order to reduce the resistance of the contact surface, the surface of the detection probe 803 is plated with gold by the electroplating process, including electroplating the gold plating on the outer side of the detection probe 803 as a whole and electroplating the gold plating only on the contact 807. At the same time, in order to ensure that the contact 807 can always be in close contact with the electrode, after the contact 807 contacts the electrode, the electric push rod 10 will continue to push the mounting plate 801 and the insulating block 802 to approach the battery cell 17, and the detection probe 803 will slide and compress the spring 804. The thrust provided by the spring 804 can ensure that the contact 807 at the end of the detection probe 803 is always in contact with the electrode, and the use of the spring 804 can also prevent the detection probe 803 from causing damage to the electrode.

[0050] Since a displacement sensor 12 is installed on each pressure plate 2, and each displacement sensor 12 detects the distance between it and the pressure plate 2 or support plate 1 below, and each pressure plate 2 is installed on the mounting frame 5 by the cooperation and sliding of the slider 3 and the slide rail 4, when the battery cell 17 is charged and expanded, it will push the upper pressure plate 2 to move upward. Since the pressure above each battery cell 17 is different, the degree of expansion of each battery cell 17 after being fully charged will also be different. Therefore, the displacement detected by the displacement sensor 12 on each pressure plate 2 is also different. By matching different displacement amounts and the pressure borne by the battery cell 17, the expansion amount of the battery cell 17 under different pressures can be calculated, thereby improving the detection efficiency.

[0051] In this embodiment, the first adjustment slot 15 and the second adjustment slot 13 include two configuration forms;

[0052] The first setting format is as follows Figure 6 As shown, the first adjustment groove 15 is a whole, and the second adjustment groove 13 is divided into two sections, which are respectively located on both sides of the first adjustment groove 15; if the second adjustment groove 13 is a whole, the first adjustment groove 15 will be divided into two sections, which will be located on both sides of the second adjustment groove 13, so that the production and processing are relatively simple;

[0053] The second setting form is as follows Figure 7 As shown, the first adjustment groove 15 and the second adjustment groove 13 are both in two sections, and the two first adjustment grooves 15 are arranged on both sides of the second adjustment groove 13, and similarly the two second adjustment grooves 13 are also located on both sides of the two first adjustment grooves 15. Such an arrangement can reduce materials and reduce costs.

[0054] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A multifunctional battery cell testing tool, comprising a support plate (1), characterized in that: The support plate (1) is provided with a mounting frame (5) and a column (19); a plurality of pressing plates (2) are slidably arranged in the mounting frame (5); each pressing plate (2) is provided with a displacement sensor (12); an adjustment slot is also provided on the pressing plate (2); a limit block is provided on the adjustment slot; the column (19) is located at one side of the mounting frame (5); an electric push rod (10) is fixedly arranged on the column (19); a probe assembly (8) is provided at the output end of the electric push rod (10); a controller (9) is also provided on the mounting frame (5); the controller (9) is electrically connected to the probe assembly (8), the electric push rod (10) and the displacement sensor (12) respectively.

2. A multifunctional battery cell testing tool according to claim 1, characterized in that: The probe assembly (8) comprises a mounting plate (801), an insulating block (802), a detection probe (803), a spring (804) and a wiring terminal (805); the mounting plate (801) is fixed to the output end of the electric push rod (10); the insulating block (802) is arranged on the mounting plate (801); the detection probe (803) is arranged through the insulating block (802); the wiring terminal (805) is installed on one end of the detection probe (803) through a nut (806); a contact (807) is fixedly arranged at the other end of the probe; and the spring (804) is sleeved on the detection probe (803) between the contact (807) and the insulating block (802).

3. The multifunctional battery cell testing tool according to claim 1, characterized in that: A set of relative inner walls of the installation frame (5) are fixedly provided with slide rails (4), a slider (3) is slidably provided on the slide rails (4), and the pressure plate (2) is slidably provided on the installation frame (5) via the slider (3).

4. The multifunctional battery cell testing tool according to claim 1, characterized in that: Insulating plates (6) are fitted on the top and bottom surfaces of the pressing plate (2).

5. The multifunctional battery cell testing tool according to claim 1, characterized in that: A C-shaped groove (18) is fixedly arranged in each of the adjustment grooves, and a T-shaped bolt (14) is arranged on the C-shaped groove (18).

6. The multifunctional battery cell testing tool according to claim 5, characterized in that: The adjustment groove comprises a first adjustment groove (15) and a second adjustment groove (13), the first adjustment groove (15) and the second adjustment groove (13) are perpendicular to each other, the limit block comprises a first limit block (7) and a second limit block (16), and there are two of the first limit block (7) and the second limit block (16), the two first limit blocks (7) are arranged on the first adjustment groove (15) through the T-bolt (14) and the C-slot (18), and the two second limit blocks (16) are arranged on the second adjustment groove (13) through the T-bolt (14) and the C-slot (18).

7. The multifunctional battery cell testing tool according to claim 1, characterized in that: The column (19) is also provided with a start button (11), and the start button (11) is electrically connected to the controller (9).

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