Test tool suitable for lithium batteries with different sizes

Abstract

The utility model provides a testing tool suitable for lithium batteries with different sizes, which relates to the technical field of battery testing tools and comprises a supporting mechanism, an adjusting mechanism and an overcurrent mechanism, a battery is clamped on the supporting mechanism, and the overcurrent mechanism is mounted on the supporting mechanism through the adjusting mechanism. And the overcurrent mechanism adjusts the position relative to the battery through the adjusting mechanism and is in contact with the positive and negative electrodes of the battery. According to the utility model, the positions of the two over-current mechanisms relative to the battery can be adjusted through the two-way movement of the sliding frame and the sliding piece, so as to adapt to the connection of tabs of different batteries and carry out testing; according to the utility model, the overcurrent mechanism and the conductive copper block can form a parallel test, or two batteries can be tested at the same time, so that the test scene and efficiency of the batteries are increased.

Description

Technical Field

[0001] The utility model relates to the technical field of battery testing tools, in particular to a testing tool suitable for lithium batteries of different sizes. Background Art

[0002] Among the existing lithium battery testing tools, most use a simple rotating screw to press down a probe or copper sheet on the tab, or use a clamp plus a linear bearing to guide the downward pressure. Due to the low precision of the clamp, it is impossible to ensure that the test tab is evenly stressed, and the internal resistance between the test current line, the voltage line and the battery is large, making it difficult to meet the requirements of high-rate current testing. At this stage, battery sizes are increasing, and batteries with tabs on both sides, such as blade batteries, are also appearing in large numbers, making it difficult for existing tooling to be compatible.

[0003] For example, the invention patent application authorization announcement number CN110208699A, the invention patent content provides a lithium battery test fixture, including a base component, a pressing module, a guide component, and a driving component. The base component is provided with guide components at both ends, the base component is provided with a pressing module above the base component, and the pressing module is provided with a driving component above the pressing module. The invention adopts a quick clamp plus a linear bearing guide to quickly and easily clamp the current line and the battery, but the invention may not be able to ensure the close contact between the battery and the test fixture. The pressing force is low when the pressing rod is used alone, and the pressing block cannot be kept horizontal, which may cause tilting, resulting in a large connection internal resistance, which cannot meet the test requirements of high-rate current, and the positive and negative pressing modules of the fixture cannot be adjusted, and cannot adapt to batteries of various sizes and specifications, and has low applicability. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a testing tool suitable for lithium batteries of different sizes, which can adjust the positive and negative poles of the tool to correspond to the positive and negative poles of the battery and is suitable for testing batteries of various sizes.

[0005] Based on the technical problems existing in the background technology, the utility model proposes a testing tool suitable for lithium batteries of different sizes, including a supporting mechanism, an adjusting mechanism and an overcurrent mechanism. The battery is clamped on the supporting mechanism, and the overcurrent mechanism is installed on the supporting mechanism through the adjusting mechanism. The overcurrent mechanism adjusts its position relative to the battery through the adjusting mechanism and contacts the positive and negative poles of the battery.

[0006] Preferably, the adjustment mechanism comprises a sliding frame, a bracket and a support plate, the support plate is mounted on the support mechanism via the support frame, a guide rail is installed between the support plate and the support mechanism, the sliding frame is slidably mounted on the guide rail, and can move toward or away from the support mechanism.

[0007] Preferably, the sliding frame is a rectangular frame, a sliding rail is arranged inside the sliding frame, two sliding members that can move closer to or farther from each other are slidably mounted on the sliding rail, and two flow-through mechanisms are respectively mounted on the two sliding members.

[0008] Preferably, the support plate is installed with a driving mechanism, and the driving mechanism is connected to the sliding frame and can drive the sliding frame to slide along the guide rail.

[0009] Preferably, a fastening mechanism is also installed on the supporting mechanism.

[0010] Preferably, three insulating blocks are installed on the supporting mechanism, and conductive copper blocks are installed in two intervals between the three insulating blocks.

[0011] Preferably, the sliding frame can slide on the guide rail to make the current-passing mechanism contact the conductive copper block.

[0012] Preferably, the guide rail and the slide rail are guided perpendicular to each other.

[0013] Preferably, the overcurrent mechanism includes a conductive column, an insulating shell and a current block, the conductive column is slidably mounted on the insulating shell, the insulating shell is mounted on a sliding part, the current block is connected to one end of the conductive column facing the conductive copper block, an elastic part is sleeved on the conductive column, and the two ends of the elastic part respectively contact the current block and the insulating shell, and a voltage pin is installed on the side of the current block facing the conductive copper block.

[0014] Preferably, the pressed surfaces of the current block and the conductive copper block are both serrated and staggered with each other.

[0015] Compared with the prior art, the utility model proposes a test fixture suitable for lithium batteries of different sizes, which adopts the above technical solution and achieves the following technical effects:

[0016] The utility model can adjust the positions of the two overcurrent mechanisms relative to the battery by the two-way movement of the sliding frame and the sliding member, so as to adapt to the connection of the pole ears of different batteries and perform tests; in the utility model, the overcurrent mechanism can be used to form a parallel test with the conductive copper block, or two batteries can be tested at the same time, thereby increasing the test scenarios and efficiency of the batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a front view of the support mechanism of the utility model;

[0019] Figure 3 This is a schematic diagram of the support mechanism structure of the utility model;

[0020] Figure 4It is a schematic diagram of the structure of the flow mechanism and the regulating mechanism of the utility model;

[0021] Figure 5 It is a schematic diagram of the structure of the flow mechanism of the utility model.

[0022] In the figure: 1. supporting mechanism; 2. adjusting mechanism; 3. overcurrent mechanism; 21. sliding frame; 22. bracket; 23. supporting plate; 4. guide rail; 24. slide rail; 25. sliding member; 5. driving mechanism; 6. fastening mechanism; 7. insulating block; 8. conductive copper block; 31. conductive column; 32. insulating shell; 33. current block; 34. elastic member; 35. voltage needle. DETAILED DESCRIPTION

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0025] Example

[0026] Please refer to Figure 1-Figure 5The utility model proposes a test fixture suitable for lithium batteries of different sizes, including a support mechanism 1, an adjustment mechanism 2 and an overcurrent mechanism 3. The support mechanism 1 clamps the battery, and the overcurrent mechanism 3 is installed on the support mechanism 1 through the adjustment mechanism 2. The overcurrent mechanism 3 adjusts its position relative to the battery through the adjustment mechanism 2 and contacts the positive and negative electrodes of the battery. In the utility model, the adjustment mechanism 2 can achieve two-way adjustment, i.e., longitudinal adjustment and lateral adjustment. Two overcurrent mechanisms 3 are installed on the adjustment mechanism 2. The two overcurrent mechanisms 3 respectively contact with the two pole ears of the battery, and the overcurrent mechanism 3 adjusts its position through the adjustment mechanism 2 to make contact; in the utility model, the support mechanism 1 can support the adjustment mechanism 2 and facilitate the placement of the battery.

[0027] For specific embodiments, please refer to Figure 2 , Figure 3 , Figure 4 The adjustment mechanism 2 includes a sliding frame 21, a bracket 22 and a support plate 23. The support plate 23 is installed on the support mechanism 1 through the support frame. A guide rail 4 is installed between the support plate 23 and the support mechanism 1. The sliding frame 21 is slidably installed on the guide rail 4 and can move in the direction close to or away from the support mechanism 1. The support mechanism 1 includes a bottom plate. The two ends of the bracket 22 are respectively connected to the bottom plate and the support plate 23. The sliding frame 21 is located between the bottom plate and the support plate 23. The guide rail 4 is longitudinally installed between the bottom plate and the support plate 23. The guide rail 4 is cylindrical. The sliding frame 21 is provided with a circular hole matching the installation of the slide rail 24. The sliding frame 21 can slide along the guide rail 4 to approach the bottom plate or the support plate 23. In the utility model, a plurality of openings are provided on the bottom plate, which can facilitate the improvement of the heat dissipation effect of the battery when the battery is placed.

[0028] For specific embodiments, please refer to Figure 2 , Figure 3 , Figure 4 The sliding frame 21 is a rectangular frame, and a slide rail 24 is arranged inside the sliding frame 21. Two sliding members 25 that can move closer to or away from each other are slidably mounted on the slide rail 24, and the two current-passing mechanisms 3 are respectively mounted on the two sliding members 25. The sliding frame 21 is a hollow frame in the shape of a square. Two non-adjacent edges are provided with slide rails 24, and the slide rails 24 are located inside the sliding frame 21. The guide of the slide rails 24 is longitudinal, that is, it cooperates with the guide rails 4 to achieve the effect of two-way sliding adjustment. The two sliding members 25 can slide relative to the slide rails 24 and can move closer to or away from each other. An insulating block 7 is also installed in the middle of the sliding frame 21 to prevent the two sliding members 25 from contacting each other. The insulating block 7 can be fixed to the insulating part of the bottom plate by screws, so that the current-passing mechanism 3 can be tightened after contacting the battery's pole ear.

[0029] For specific embodiments, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4The support plate 23 is provided with a driving mechanism 5, which is connected to the sliding frame 21 and can drive the sliding frame 21 to slide along the guide rail 4. The movement of the bottom plate of the sliding frame 21 can be achieved manually or automatically. In the present invention, the manual method is adopted, and the driving mechanism 5 is a hand presser. The support plate 23 is provided with a slot, and the hand presser is installed on the support plate 23 and connected to the sliding frame 21. At the same time, the hand presser can also be replaced by a cylinder or a linear driving mechanism 5.

[0030] For specific embodiments, please refer to Figure 1 A fastening mechanism 6 is also installed on the support mechanism 1. The battery is placed on the bottom plate, and the position of the battery tab needs to remain unchanged to prevent poor contact during testing. Therefore, the battery is fixed by the fastening mechanism 6, and the fastening mechanism 6 is composed of bolts and cross bars. The cross bars and the bottom plate clamp the battery in the middle, and the cross bars are connected and fixed to the bottom plate by bolts to fasten the battery.

[0031] For specific embodiments, please refer to Figure 1 Three insulating blocks 7 are installed on the support mechanism 1, and conductive copper blocks 8 are installed in two intervals between the three insulating blocks 7. The base of the support mechanism 1 is made of insulating material, and the three insulating blocks 7 separate the two conductive copper blocks 8 to prevent arcing or short circuit caused by accidental contact between the conductive copper blocks 8.

[0032] For specific embodiments, please refer to Figure 1 , Figure 2 , Figure 4 The sliding frame 21 slides through the guide rail 4 to make the overcurrent mechanism 3 contact the conductive copper block 8. The conductive copper block 8 is arranged along the sliding direction of the overcurrent mechanism 3, so that after the overcurrent mechanism 3 slides horizontally, any part of the conductive copper block 8 can correspond to the overcurrent mechanism 3 in the longitudinal position.

[0033] For specific embodiments, please refer to Figure 1 , the guide rail 4 and the guide rail 24 are perpendicular to each other.

[0034] For specific embodiments, please refer to Figure 4 , Figure 5The overcurrent mechanism 3 includes a conductive column 31, an insulating shell 32 and a current block 33. The conductive column 31 is slidably mounted on the insulating shell 32, and the insulating shell 32 is mounted on the sliding member 25. The current block 33 is connected to one end of the conductive column 31 facing the conductive copper block 8. An elastic member 34 is sleeved on the conductive column 31, and the two ends of the elastic member 34 respectively contact the current block 33 and the insulating shell 32. A voltage needle 35 is installed on one side of the current block 33 facing the conductive copper block 8. The overcurrent mechanism 3 and the conductive copper block 8 can reduce the wiring impedance when testing the parallel channel. At the same time, the utility model can test a battery through a single conductive copper block 8 and a single overcurrent mechanism 3, or test the battery through two overcurrent mechanisms 3; the voltage needle 35 in the utility model is used to contact the battery's pole ear, which will compress the spring during the extrusion process, so that the pole ear and the entire overcurrent mechanism 3 are in contact more powerfully and fully.

[0035] For specific embodiments, please refer to Figure 1 , Figure 5 The pressing surfaces of the current block 33 and the conductive copper block 8 are both serrated and staggered. When the two surfaces are pressed together, the conductive effect between the battery and the device can be made stronger.

[0036] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A test fixture suitable for lithium batteries of different sizes, characterized in that: The invention comprises a support mechanism (1), an adjustment mechanism (2) and a current-passing mechanism (3); a battery is clamped on the support mechanism (1); the current-passing mechanism (3) is installed on the support mechanism (1) via the adjustment mechanism (2); the current-passing mechanism (3) adjusts its position relative to the battery via the adjustment mechanism (2) and contacts the positive and negative electrodes of the battery.

2. The testing tool for lithium batteries of different sizes according to claim 1, characterized in that: The adjusting mechanism (2) comprises a sliding frame (21), a bracket (22) and a support plate (23); the support plate (23) is mounted on the support mechanism (1) via the support frame; a guide rail (4) is mounted between the support plate (23) and the support mechanism (1); the sliding frame (21) is slidably mounted on the guide rail (4) and can move in a direction close to or away from the support mechanism (1).

3. The testing tool for lithium batteries of different sizes according to claim 2, characterized in that: The sliding frame (21) is a rectangular frame. A sliding rail (24) is arranged inside the sliding frame (21). Two sliding members (25) that can move closer to or farther from each other are slidably mounted on the sliding rail (24). The two flow-through mechanisms (3) are respectively mounted on the two sliding members (25).

4. The testing tool for lithium batteries of different sizes according to claim 2, characterized in that: The support plate (23) is equipped with a driving mechanism (5), and the driving mechanism (5) is connected to the sliding frame (21) and can drive the sliding frame (21) to slide along the guide rail (4).

5. The testing tool for lithium batteries of different sizes according to claim 1, characterized in that: A fastening mechanism (6) is also installed on the supporting mechanism (1).

6. The testing tool for lithium batteries of different sizes according to claim 1, characterized in that: Three insulating blocks (7) are installed on the support mechanism (1), and conductive copper blocks (8) are installed in two intervals between the three insulating blocks (7).

7. The testing tool for lithium batteries of different sizes according to claim 2, characterized in that: The sliding frame (21) slides via the guide rail (4) to enable the current-passing mechanism (3) to contact the conductive copper block (8).

8. The testing tool for lithium batteries of different sizes according to claim 2, characterized in that: The guide rail (4) and the slide rail (24) are perpendicular to each other.

9. The testing tool for lithium batteries of different sizes according to claim 1, characterized in that: The overcurrent mechanism (3) comprises a conductive column (31), an insulating shell (32) and a current block (33); the conductive column (31) is slidably mounted on the insulating shell (32); the insulating shell (32) is mounted on a sliding member (25); the current block (33) is connected to one end of the conductive column (31) facing the conductive copper block (8); an elastic member (34) is sleeved on the conductive column (31); and two ends of the elastic member (34) respectively contact the current block (33) and the insulating shell (32); and a voltage pin (35) is mounted on one side of the current block (33) facing the conductive copper block (8).

10. The testing tool for lithium batteries of different sizes according to claim 9, characterized in that: The pressed surfaces of the current block (33) and the conductive copper block (8) are both serrated and staggered with respect to each other.

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