Testing device for lithium battery

Abstract

The utility model discloses a testing device for a lithium battery, which relates to the field of lithium battery detection and comprises a testing box body, a control panel is arranged at the top of the outer side of the testing box body, first limiting grooves are symmetrically formed in the inner walls of the two transverse sides of the testing box body, and a supporting frame is arranged on one side of the testing box body; a conveying assembly matched with the supporting frame is arranged at the top end of the testing box body, a sweeping piece matched with the bottom end of the testing box body is arranged at the bottom end of the conveying assembly, and overcharge detection assemblies matched with the first limiting grooves are arranged on the two sides of the conveying assembly respectively. Under the cooperation of the test box body, the conveying assembly and the overcharge detection assembly, potential safety hazards can be found and eliminated in time through the overcharge detection operation on the lithium battery, the consistency, stability and reliability of the lithium battery are ensured, unqualified lithium batteries are prevented from flowing into the market, the use safety of users is ensured, and the production efficiency is improved. And the stability of the overall performance of the lithium battery is improved.

Description

Technical Field

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

[0002] Lithium batteries are rechargeable batteries that use lithium metal or lithium ions as energy storage materials. They store and release energy through the intercalation and deintercalation of lithium ions between the positive and negative electrodes. These batteries offer advantages such as high energy density, long cycle life, lightweight design, and relative safety. They are widely used in portable electronic devices, electric vehicles, energy storage systems, and many other fields.

[0003] Testing is performed during the lithium battery processing process to ensure the quality and safety performance of the battery. Through testing, raw material defects, process defects and potential safety hazards can be discovered and eliminated in a timely manner, thereby ensuring the consistency, stability and reliability of the battery, preventing unqualified batteries from entering the market, ensuring user safety and improving the overall performance of the product.

[0004] Overcharge detection is crucial for lithium battery safety testing. It effectively prevents runaway internal chemical reactions caused by excessive voltage during charging, avoids excessive heat and gas generation, and reduces the risk of dangerous situations such as battery expansion, leakage, and short circuits. Overcharge detection ensures that batteries are charged within a safe operating voltage range, thereby extending battery life, reducing the risk of accidents, and protecting users' personal and property safety. It is a key measure to ensure the safety and reliability of lithium batteries.

[0005] Currently, lithium battery testing is typically performed in an independent test chamber. However, the narrow interior of the chamber makes it difficult to repeatedly remove and replace lithium batteries. Furthermore, the narrow space makes it difficult to clean up residual battery debris after the test, making manual cleaning extremely time-consuming and troublesome, and thus limiting.

[0006] Currently, no effective solutions have been proposed for the problems in related technologies. Utility Model Content

[0007] In view of the problems in the related art, the present invention proposes a testing device for lithium batteries to overcome the above technical problems existing in the existing related art.

[0008] To this end, the specific technical solutions adopted in this utility model are as follows:

[0009] A testing device for lithium batteries includes a test box, a control panel is provided on the top outer side of the test box, limit slots are symmetrically provided on the inner walls on both sides of the test box, and a support frame is provided on one side of the test box; a conveying assembly that cooperates with the support frame is provided on the top of the test box, a cleaning piece that cooperates with the bottom of the test box is provided at the bottom of the conveying assembly, and overcharge detection assemblies that respectively cooperate with the limit slot are provided on both sides of the conveying assembly; a collecting groove that cooperates with the cleaning piece is provided at the bottom of the test box, and the corners of the collecting groove are provided with rounded corners; an inclined surface is provided inside the limit slot, and the thickness of the inclined surface decreases from left to right.

[0010] Furthermore, in order to more conveniently transport the lithium batteries into the test box, the conveying assembly includes a motor arranged at the top of the test box, a transmission rod is provided at one end of the motor output shaft, a gear is provided at the bottom end of the transmission rod, a support seat that cooperates with the top of the test box is sleeved on the outer side of the transmission rod, a limit rod is symmetrically provided at the bottom end of the support seat, and limit plates that cooperate with the support seat are symmetrically provided on the outer sides of the two groups of limit rods, a sliding frame that cooperates with the limit rod is provided at the top of the two groups of limit plates, a rack that meshes with the gear is provided on one side of the sliding frame, and a support frame that cooperates with the overcharge detection assembly is provided at the bottom end of the sliding frame; a limit slot 2 is provided at the inner top of the support frame; and the shape of the limit plate is L-shaped.

[0011] Furthermore, in order to more conveniently clean the debris and residue of the lithium battery, the cleaning member includes a fixed plate arranged on one side of the support frame and matched with the sliding frame, and a cleaning plate is provided at the bottom end of the fixed plate and matched with the test box and the collection tank.

[0012] Furthermore, in order to be able to perform overcharge tests on lithium batteries more safely and stably, the overcharge detection component includes a support block arranged on one side of the support frame, a movable rod is arranged inside the support block and passes through the support frame, a voltage sensor is arranged at one end of the movable rod close to the support frame, a limiting protrusion matching the inclined surface is arranged at the other end of the movable rod, and a spring matching the movable rod is arranged between the limiting protrusion and the support block; a lithium battery electrode sheet is arranged on the side of the voltage sensor close to the second limiting groove.

[0013] The beneficial effects of the utility model are:

[0014] 1. With the cooperation of the test box, the conveying assembly and the overcharge detection assembly, the utility model can timely discover and eliminate potential safety hazards through the overcharge detection operation of the lithium battery, ensure the consistency, stability and reliability of the lithium battery, avoid unqualified lithium batteries from entering the market, ensure the safety of users, and improve the stability of the overall performance of the lithium battery.

[0015] 2. With the cooperation of the conveying component, the cleaning component and the overcharge detection component, the utility model can more conveniently and repeatedly take out and replace lithium batteries, and after the test is completed, the lithium battery fragments and residues inside the test box are cleaned, which improves the efficiency of manual cleaning and speeds up the lithium battery detection operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a structural schematic diagram of a lithium battery testing device according to an embodiment of the present utility model;

[0018] Figure 2 is a cross-sectional view of a lithium battery testing device according to an embodiment of the present utility model;

[0019] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle;

[0020] Figure 4 yes Figure 2 A partial enlarged view of point B in the middle.

[0021] In the picture:

[0022] 1. Test box; 2. Control panel; 3. Limit slot 1; 4. Support frame; 5. Conveying assembly; 501. Motor; 502. Transmission rod; 503. Gear; 504. Support seat; 505. Limit rod; 506. Limit plate; 507. Sliding frame; 508. Rack; 509. Support frame; 510. Limit slot 2; 6. Cleaning part; 601. Fixed plate; 602. Cleaning plate; 7. Overcharge detection assembly; 701. Support block; 702. Movable rod; 703. Voltage sensor; 704. Limiting protrusion; 705. Spring; 706. Lithium battery electrode sheet; 8. Collecting tank; 9. Inclined surface. DETAILED DESCRIPTION

[0023] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. By referring to these contents, ordinary technicians in this field should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0024] According to an embodiment of the present utility model, a testing device for a lithium battery is provided.

[0025] The present invention will now be further described with reference to the accompanying drawings and specific embodiments. Figures 1-4 As shown, the testing device for lithium batteries according to the embodiment of the present invention includes a test box 1, a control panel 2 is provided on the outer top of the test box 1, limit slots 3 are symmetrically provided on the inner walls on both sides of the test box 1, and a support frame 4 is provided on one side of the test box 1; a conveying component 5 that cooperates with the support frame 4 is provided on the top of the test box 1, a cleaning piece 6 that cooperates with the bottom of the test box 1 is provided at the bottom of the conveying component 5, and overcharge detection components 7 that respectively cooperate with the limit slot 3 are provided on both sides of the conveying component 5; a collecting groove 8 that cooperates with the cleaning piece 6 is provided at the bottom of the test box 1, and the corners of the collecting groove 8 are provided with rounded corners; an inclined surface 9 is provided inside the limit slot 3, and the thickness of the inclined surface 9 decreases from left to right.

[0026] With the help of the above technical scheme, the utility model can timely discover and eliminate potential safety hazards through overcharge detection of lithium batteries under the cooperation of the test box 1, the conveying component 5 and the overcharge detection component 7, thereby ensuring the consistency, stability and reliability of the lithium batteries, avoiding the influx of unqualified lithium batteries into the market, ensuring the safety of users, and improving the stability of the overall performance of the lithium batteries; with the cooperation of the conveying component 5, the cleaning component 6 and the overcharge detection component 7, the lithium batteries can be repeatedly taken out, replaced and replaced more conveniently, and after the test is completed, the lithium battery debris and residue inside the test box 1 are cleaned, which improves the efficiency of manual cleaning and speeds up the lithium battery detection operation.

[0027] In one embodiment, for the above-mentioned conveying assembly 5, the conveying assembly 5 includes a motor 501 arranged at the top of the test box 1, a transmission rod 502 is provided at one end of the output shaft of the motor 501, a gear 503 is provided at the bottom end of the transmission rod 502, and a support base 504 that cooperates with the top of the test box 1 is sleeved on the outer side of the transmission rod 502. The bottom end of the support base 504 is symmetrically provided with a limit rod 505, and the outer sides of the two sets of limit rods 505 are symmetrically provided with a gear that cooperates with the support base 504. The limiting plates 506 are provided at the top of the two sets of limiting plates 506, and the sliding frames 507 that cooperate with the limiting rods 505 are provided. A rack 508 that meshes with the gear 503 is provided on one side of the sliding frames 507. The bottom end of the sliding frames 507 is provided with a support frame 509 that cooperates with the overcharge detection component 7; the inner top of the support frame 509 is provided with a limiting groove 510; the limiting plates 506 are L-shaped, so that the lithium batteries can be more conveniently transported into the test box 1.

[0028] The working principle of the conveying component 5 is as follows:

[0029] The lithium battery is placed in the limiting slot 2 510 in the conveying assembly 5, and then the motor 501 in the conveying assembly 5 is controlled and started through the control panel 2. Under the rotation of the output shaft of the motor 501, the transmission rod 502 is driven to rotate. Under the rotation of the transmission rod 502, the gear 503 is driven to rotate. Under the rotation of the gear 503 and with the cooperation of the rack 508, the sliding frame 507 is driven to move horizontally between the limiting rod 505 and the limiting plate 506. Under the movement of the sliding frame 507, the support frame 509 is driven to move, thereby driving the lithium battery to move in the test box 1.

[0030] In one embodiment, for the above-mentioned cleaning member 6, the cleaning member 6 includes a fixed plate 601 arranged on one side of the support frame 509 and cooperating with the sliding frame 507, and a cleaning plate 602 cooperating with the test box 1 and the collection tank 8 is provided at the bottom end of the fixed plate 601; thereby, the debris and residue of the lithium battery can be cleaned more conveniently.

[0031] In one embodiment, for the above-mentioned overcharge detection component 7, the overcharge detection component 7 includes a support block 701 arranged on one side of the support frame 509, and a movable rod 702 is arranged inside the support block 701 and passes through the support frame 509. The movable rod 702 is provided with a voltage sensor 703 at one end close to the support frame 509, and the other end of the movable rod 702 is provided with a limiting protrusion 704 that cooperates with the inclined surface 9, and a spring 705 that cooperates with the movable rod 702 is provided between the limiting protrusion 704 and the support block 701; thereby, the lithium battery can be overcharged more safely and stably; a lithium battery electrode sheet 706 is provided on the side of the voltage sensor 703 close to the limiting groove 2 510.

[0032] It should be explained that the working principle of the voltage sensor 703 is based on the voltage-current conversion characteristics of electromagnetic induction or semiconductor devices. The voltage sensor 703 includes a sensitive element, such as a resistor, capacitor or semiconductor diode, which can respond to voltage changes. When voltage is applied to the sensor, the resistance, capacitance or semiconductor characteristics of the sensitive element change, thereby generating a measurable current, charge or frequency change. This change is converted into a standard signal, such as an analog voltage or a digital signal, through an amplification and conversion circuit to facilitate subsequent measurement, monitoring or control. This is existing technology and will not be explained in detail here.

[0033] The working principle of the overcharge detection component 7 is as follows:

[0034] The conveying assembly 5 is controlled and started by the control panel 2. When the lithium battery is driven into the interior of the test box 1 by the conveying assembly 5, the limiting protrusion 704 in the overcharge detection assembly 7 is squeezed with the cooperation of the limiting groove 1 3 and the inclined surface 9. Under the action of the squeezing of the limiting protrusion 704, the two groups of movable rods 702 are driven to approach each other along the support block 701, and the spring 705 is squeezed at the same time. Under the action of the two groups of movable rods 702 approaching each other, the two groups of voltage sensors 703 are driven to approach each other. Under the action of the voltage sensors 703 approaching each other, the two groups of lithium battery electrode sheets 706 are driven to approach each other and contact the lithium battery placed in the limiting groove 2 510 in the conveying assembly 5. Then, the detected data is transmitted back to the control panel 2 in the form of an electrical signal through the voltage sensor 703 for recording, thereby realizing the overcharge detection operation of the lithium battery.

[0035] The process of lithium battery overcharge detection includes the following steps:

[0036] First, set the normal charging voltage and current range according to the lithium battery specification (for most lithium batteries, the upper limit of the normal charging voltage is usually around 4.2V);

[0037] During the charging process, the voltage at both ends of the battery is monitored in real time through the lithium battery electrode sheet;

[0038] Compare the monitored voltage value with the preset upper limit of normal charging voltage. If the voltage remains within the normal charging voltage range (for example, below 4.2V), the current charging state is considered normal.

[0039] If the voltage exceeds the set current range, the current charging state is considered abnormal and the lithium battery is unqualified (if the voltage occasionally rises briefly but quickly returns to the normal range, it may be due to changes in the battery's internal impedance or temperature, which is also considered normal);

[0040] The voltage sensor 703 monitors whether the charging current remains within the normal range. If an abnormal current change occurs, it is considered that overcharging has occurred. At the same time, the system records data such as voltage and current, and feeds this information back to the control panel 2 for further analysis and decision-making.

[0041] In order to facilitate understanding of the above technical solutions of the present invention, the working principle or operation method of the present invention in actual process is described in detail below.

[0042] In actual application, the lithium battery to be tested is first placed in the second limiting groove 510 of the conveying assembly 5. The conveying assembly 5 is controlled and started through the control panel 2. Under the action of the conveying assembly 5, the lithium battery is driven into the interior of the test box 1. When it reaches the interior of the test box 1, the lithium battery is tested for overcharge with the cooperation of the overcharge detection assembly 7.

[0043] After the lithium battery test is completed, the control panel 2 is used to control and start the conveying component 5 again. Under the action of the conveying component 5, the lithium battery is transported to the outside of the test box 1, and in this process, the fixed plate 601 in the cleaning component 6 is driven to move. Under the action of the movement of the fixed plate 601, the cleaning plate 602 is driven to clean the lithium battery fragments and residues at the bottom of the test box 1 into the collection tank 8, which is convenient for subsequent staff to clean and collect the lithium battery fragments and residues.

[0044] The working principles of the conveying component 5 and the overcharge detection component 7 and the lithium battery overcharge detection process are as described above.

[0045] To sum up, with the help of the above-mentioned technical scheme of the present invention, the present invention can timely discover and eliminate potential safety hazards through overcharge detection of lithium batteries under the cooperation of the test box 1, the conveying component 5 and the overcharge detection component 7, thereby ensuring the consistency, stability and reliability of the lithium battery, avoiding the influx of unqualified lithium batteries into the market, ensuring the safety of users, and improving the stability of the overall performance of the lithium battery; with the cooperation of the conveying component 5, the cleaning component 6 and the overcharge detection component 7, the lithium battery can be repeatedly taken out, replaced and replaced more conveniently, and after the test is completed, the lithium battery fragments and residues inside the test box 1 are cleaned, which improves the efficiency of manual cleaning and speeds up the lithium battery detection operation.

[0046] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A lithium battery testing device, comprising a test box (1), characterized in that: A control panel (2) is provided on the top of the outer side of the test box (1), and limiting grooves (3) are symmetrically provided on the inner walls on both sides of the test box (1), and a support frame (4) is provided on one side of the test box (1); The top of the test box (1) is provided with a conveying assembly (5) that cooperates with the support frame (4), the bottom of the conveying assembly (5) is provided with a cleaning member (6) that cooperates with the bottom of the test box (1), and both sides of the conveying assembly (5) are provided with overcharge detection assemblies (7) that respectively cooperate with the limiting groove (3).

2. A lithium battery testing device according to claim 1, characterized in that: A collecting groove (8) cooperating with the cleaning member (6) is provided at the bottom end of the test box (1), and the corners of the collecting groove (8) are rounded.

3. A lithium battery testing device according to claim 2, characterized in that: An inclined surface (9) is provided inside the limiting groove 1 (3), and the thickness of the inclined surface (9) decreases from left to right.

4. A lithium battery testing device according to claim 3, characterized in that: The conveying assembly (5) comprises a motor (501) arranged at the top of the test box (1), a transmission rod (502) is arranged at one end of the output shaft of the motor (501), a gear (503) is arranged at the bottom end of the transmission rod (502), a support seat (504) matched with the top of the test box (1) is sleeved on the outer side of the transmission rod (502), and a limit rod (505) is symmetrically arranged at the bottom end of the support seat (504), and two sets of limit rods (505) are arranged on the outer side of the transmission rod (502). The outer side of the rod (505) is symmetrically provided with a limit plate (506) that cooperates with the support seat (504), the top ends of the two groups of limit plates (506) are provided with a sliding frame (507) that cooperates with the limit rod (505), one side of the sliding frame (507) is provided with a rack (508) that meshes with the gear (503), and the bottom end of the sliding frame (507) is provided with a support frame (509) that cooperates with the overcharge detection component (7).

5. The lithium battery testing device according to claim 4, characterized in that: A second limiting groove (510) is provided at the inner top end of the support frame (509); The limiting plate (506) is in an L-shape.

6. The lithium battery testing device according to claim 5, characterized in that: The cleaning member (6) comprises a fixing plate (601) arranged on one side of the support frame (509) and cooperating with the sliding frame (507), and a cleaning plate (602) cooperating with the test box (1) and the collecting trough (8) is provided at the bottom end of the fixing plate (601).

7. The lithium battery testing device according to claim 6, characterized in that: The overcharge detection assembly (7) includes a support block (701) arranged on one side of the support frame (509); a movable rod (702) is arranged inside the support block (701) and passes through the support frame (509); a voltage sensor (703) is arranged at one end of the movable rod (702) close to the support frame (509); a limiting protrusion (704) cooperating with the inclined surface (9) is arranged at the other end of the movable rod (702); and a spring (705) cooperating with the movable rod (702) is arranged between the limiting protrusion (704) and the support block (701); A lithium battery electrode sheet (706) is provided on one side of the voltage sensor (703) close to the second limiting groove (510).

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