Clamping mechanism and testing device

Abstract

The utility model discloses a clamping mechanism and a testing device, and relates to the technical field of battery testing. The clamping mechanism comprises a heat insulation part and a clamping assembly, the heat insulation part is arranged outside the battery in a sleeving manner, and a tab of the battery is arranged on the heat insulation part in a penetrating manner; the clamping assembly comprises two clamping plates, the two clamping plates are configured to clamp the battery, the heat insulation part is clamped between the clamping plates and the battery, the electrode lug is located between the two clamping plates, and the electrode lug and the two clamping plates are arranged at intervals. According to the clamping mechanism, the test process can be closer to the actual use condition, so that the accuracy of the test result is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery testing, in particular to a clamping mechanism and a testing device. Background Art

[0002] In the development process of batteries, lithium-ion batteries are increasingly used in electric vehicles, energy storage and other fields due to their advantages such as high capacity, high output voltage, good discharge cycle performance and safe use.

[0003] Before batteries are put into use, they are typically tested for performance through charge and discharge. Clamping the batteries with clamps simulates the clamping force experienced by each cell in a battery pack. Adjusting the test environment temperature simulates the ambient temperature experienced during battery use. However, lithium-ion batteries generate heat during charge and discharge, which can affect their performance. During battery testing, this heat is easily dissipated, resulting in significant differences in battery temperature compared to actual use, thus affecting the accuracy of test results. Utility Model Content

[0004] The purpose of the utility model is to provide a clamping mechanism and a testing device, which can make the testing process closer to the actual usage situation, thereby improving the accuracy of the test results.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] A clamping mechanism for clamping and fixing a battery to be tested, comprising:

[0007] A heat insulating member, the heat insulating member is sleeved outside the battery, and the battery tabs are passed through the heat insulating member;

[0008] The clamping assembly includes two clamping plates, the two clamping plates are configured to clamp the battery, the thermal insulation member is clamped between the clamping plates and the battery, and the tab is located between the two clamping plates and spaced apart from the two clamping plates.

[0009] As an optional solution of the above-mentioned clamping mechanism, at least one of the clamping plates is provided with a positioning groove, and the thermal insulation member is adapted to the positioning groove.

[0010] As an optional solution to the above-mentioned clamping mechanism, the thermal insulation member has two through-holes, and the battery includes two tabs, one tab is passed through one through-hole, and the other tab is passed through the other through-hole, and the tabs are in contact with the inner walls of the corresponding through-holes.

[0011] As an optional solution to the above-mentioned clamping mechanism, the thermal insulation component includes two half shells that can be buckled together, and the two half shells are detachably connected.

[0012] As an optional solution of the above-mentioned clamping mechanism, the clamping plate includes a plate body and an insulating member, the plate body is configured to clamp the battery, and the insulating member is located between the plate body and the tab.

[0013] As an optional solution of the above-mentioned clamping mechanism, the plate body is provided with a convex strip extending in the direction of the two tabs, and the insulating member is fixedly provided on the convex strip.

[0014] As an optional solution of the above-mentioned clamping mechanism, the insulating member is provided with a fixing groove, and the protruding strip is arranged in the fixing groove and fixedly connected to the fixing groove.

[0015] As an optional solution of the above-mentioned clamping mechanism, the clamping mechanism further includes a temperature detecting component, and the temperature detecting component is arranged inside the thermal insulation component.

[0016] As an optional solution of the above-mentioned clamping mechanism, the clamping mechanism further includes a fixing assembly, and the fixing assembly includes a bolt and a nut, and the bolt is sequentially passed through the two clamping plates and is threadedly connected to the nut.

[0017] A testing device comprises the clamping mechanism and a power supply assembly, wherein the power supply assembly is electrically connected to the battery and is configured to charge or discharge the battery.

[0018] Beneficial effects of the utility model:

[0019] The utility model provides a clamping mechanism and testing device. In the clamping mechanism, two clamping plates of the clamping assembly are used to secure the battery and apply a certain amount of pressure to the battery to prevent swelling and bulging during testing. This simulates the clamping force exerted on each battery cell by adjacent batteries during use. The spacing between the tabs and the clamping plates prevents short circuits between the tabs through the clamping plates. The thermal insulation fully encases the battery, locking in the battery temperature and preventing heat loss. This allows for better monitoring of the impact of the battery's own temperature on battery performance, ensuring a more accurate test result. This ensures that the testing process more closely matches actual usage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the clamping mechanism provided by the utility model;

[0021] Figure 2 yes Figure 1 Cross-sectional view at AA in the middle;

[0022] Figure 3It is an exploded view of the clamping mechanism provided by the utility model.

[0023] In the picture:

[0024] 100. Battery; 101. Tab;

[0025] 1. Thermal insulation; 2. Clamping assembly; 3. Fixing assembly;

[0026] 11. Half shell; 21. Clamp; 31. Bolt; 32. Nut;

[0027] 211, positioning groove; 212, plate body; 213, insulating member;

[0028] 2121. Convex strips. DETAILED DESCRIPTION

[0029] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0031] Unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed or removable connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0032] Unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0033] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0034] In the development of batteries, lithium-ion batteries are increasingly used in electric vehicles, energy storage and other fields due to their high capacity, high output voltage, good discharge cycle performance and safety. Usually, multiple batteries are arranged in sequence to form a battery module, and multiple modules can form a battery pack for use in electrical equipment.

[0035] The operating temperature range of lithium-ion batteries is mostly between -20°C and 55°C. Furthermore, lithium-ion batteries release heat during charge and discharge at high rates, causing temperature fluctuations. In actual use, multiple batteries are arranged sequentially, constraining each other and effectively preventing battery expansion and bulging. Furthermore, to ensure the battery pack's usability, it is typically equipped with an insulation layer to prevent the temperature of the batteries inside the pack from rising or falling suddenly.

[0036] This embodiment provides a testing device comprising a clamping mechanism for clamping and securing a battery to be tested, and a power supply assembly. The clamping mechanism is used to clamp and secure the battery to be tested, and the power supply assembly is electrically connected to the battery and configured to charge or discharge the battery. The power supply assembly is capable of performing charging, discharging, and cyclic charge-discharge operations to complete battery testing.

[0037] like Figures 1 to 3 As shown, the clamping mechanism includes a clamping assembly 2, which includes two clamping plates 21. The two clamping plates 21 are configured to clamp the battery 100, and the tab 101 is located between the two clamping plates 21 and spaced apart from the two clamping plates 21. When performing charge and discharge tests on the lithium-ion battery 100, the two clamping plates 21 of the clamping assembly 2 are used to secure the battery 100 and apply a certain amount of pressure to the battery 100 to prevent the battery 100 from expanding or bulging during the test. At the same time, the spacing between the tab 101 and the clamping plates 21 can prevent the two tabs 101 from short-circuiting through the clamping plates 21.

[0038] To make the test environment more realistic, the test device also includes an insulated box. After the clamping assembly 2 clamps the battery 100, it is placed in the insulated box for testing. The insulated box can provide a constant temperature condition for the battery 100, thereby simulating the temperature condition of the battery 100 during use.

[0039] However, during the testing process of battery 100, the temperature of battery 100 itself changes, resulting in a temperature difference between the temperature of battery 100 itself and the temperature inside the thermal insulation box, making it easy for heat of battery 100 to dissipate, resulting in a large difference in the temperature of battery 100 compared to actual use, thereby affecting the accuracy of the test results.

[0040] like Figures 1 to 3 As shown, to address the above issues, the clamping mechanism provided in this embodiment further includes a thermal insulator 1, which is sleeved over the battery 100 and sandwiched between the clamping plate 21 and the battery 100. The tabs 101 of the battery 100 are passed through the thermal insulator 1. The thermal insulator 1 fully encases the battery 100 to prevent heat loss, making the testing process more similar to actual usage, thereby improving the accuracy of the test results.

[0041] In this embodiment, the clamping mechanism further includes a fixing assembly 3, which includes a bolt 31 and a nut 32. The bolt 31 is sequentially inserted through the two clamping plates 21 and threadedly connected to the nut 32. After the operator clamps the battery 100 using the two clamping plates 21, the bolt 31 and nut 32 can be used to secure the two clamping plates 21. The nut 32 can also be used to adjust the pre-tightening force of the two clamping plates 21 on the battery 100, thereby preventing the battery 100 from expanding or bulging.

[0042] Furthermore, the clamping mechanism is provided with multiple sets of fixing assemblies 3 along the circumference of the battery 100, allowing the operator to adjust the parallelism between the two clamping plates 21 by adjusting the nuts 32 of the fixing assemblies 3 at different positions, thereby ensuring that the clamping force exerted on the battery 100 is evenly distributed on the upper and lower surfaces. Preferably, the gap difference between the two clamping plates 21 should be controlled within 0.1 mm.

[0043] To prevent the thermal insulation member 1 from being crushed by the clamping plates 21 and to prevent the thermal insulation member 1 from partially offsetting the clamping force, in this embodiment, the thermal insulation member 1 is made of a flexible material. The flexible material also allows the thermal insulation member 1 to better wrap around the battery 100 and provide a high degree of fit. Furthermore, because the thermal insulation member 1 is made of a flexible material, it has a certain degree of elasticity. After the two clamping plates 21 clamp the battery 100, the thermal insulation member 1 can evenly distribute the clamping force on the upper and lower surfaces of the battery 100 through its own elastic deformation, preventing the battery 100 from deforming due to localized force.

[0044] In this embodiment, the clamping mechanism further includes a temperature detector disposed within the thermal insulation member 1. The temperature detector can detect the temperature of the battery 100 in real time, thereby determining whether the test environment meets the requirements based on the temperature curve, thereby determining whether the test results are accurate and referenceable.

[0045] It is worth noting that, along the clamping direction of the clamping assembly 2 , the projection of the temperature detection member on the clamping plate 21 needs to be within the projection of the battery 100 on the clamping plate 21 to more accurately detect the temperature of the battery 100 .

[0046] Preferably, the thermal insulation member 1 is provided with a receiving groove, and the temperature sensor is located within the receiving groove and in contact with the battery 100. The temperature sensor is directly attached to the battery 100, allowing it to more accurately detect the temperature of the battery 100. Furthermore, placing the temperature sensor within the receiving groove of the thermal insulation member 1 prevents damage to the temperature sensor or the battery 100 when the clamping plate 21 clamps the battery 100.

[0047] like Figure 3 As shown, at least one of the clamping plates 21 is provided with a positioning groove 211, and the thermal insulation member 1 is adapted to fit within the positioning groove 211. The adaptation of the thermal insulation member 1 to the positioning groove 211 means that when the thermal insulation member 1 is sleeved over the battery 100 and placed together with the battery 100 within the positioning groove 211, the thermal insulation member 1 and the sidewalls of the positioning groove 211 are in contact, so that the positioning groove 211 can position the battery 100 with the thermal insulation member 1 sleeved thereon.

[0048] In this embodiment, both clamping plates 21 are provided with positioning grooves 211 to further improve the positioning accuracy of the thermal insulation element 1 and the battery 100 .

[0049] In this embodiment, the thermal insulation member 1 has two through-holes, and the battery 100 includes two tabs 101 , one tab 101 is passed through one through-hole, and the other tab 101 is passed through the other through-hole, and the tabs 101 fit in contact with the inner walls of the corresponding through-holes.

[0050] It is understandable that since the battery 100 needs to be connected to the power supply assembly through two tabs 101 so that the power supply assembly can charge and discharge the battery 100, the two tabs 101 need to be led out from the inside of the thermal insulation 1. The tabs 101 and the perforation interference fit improve the sealing and heat preservation between the tabs 101 and the thermal insulation 1, which can reduce the heat loss inside the thermal insulation 1 and make the test results more accurate. Specifically, the power supply assembly can be a battery. When the battery 100 to be tested needs to be charged, the battery can charge the battery 100 to be tested; when the battery 100 to be tested needs to be discharged, the battery 100 to be tested can charge the battery.

[0051] like Figure 2 and Figure 3 As shown, the thermal insulator 1 comprises two interlocking half-shells 11, which are detachably connected. The structure of the two half-shells 11 facilitates the installation of the battery 100 within the thermal insulator 1. Since the thermal insulator 1 is made of a flexible material, the two half-shells 11 are secured together by gluing, making it easy to separate the two half-shells 11 to insert or remove the battery 100.

[0052] like Figure 2 and Figure 3 As shown, the clamping plate 21 includes a plate body 212 and an insulating member 213. The plate body 212 is configured to clamp the battery 100, and the insulating member 213 is located between the plate body 212 and the tab 101. Generally speaking, the tab 101 is made of a relatively soft material. The provision of the insulating member 213 can completely prevent the plate body 212 and the tab 101 from causing a short circuit due to contact, thereby improving safety during testing and avoiding safety accidents.

[0053] Furthermore, the plate body 212 is provided with protruding strips 2121 extending toward the two tabs 101, and the insulating member 213 is fixedly mounted on the protruding strips 2121. It is understood that due to the provision of the protruding strips 2121, when the tab 101 bends, it can only contact the insulating member 213 on the protruding strips 2121, and will not contact the rest of the plate body 212. Therefore, the insulating member 213 can be provided only on the protruding strips 2121, reducing the amount of insulating member 213 used and reducing costs. Moreover, the protruding strips 2121 on both plates 212 can also provide a certain degree of positioning for the tab 101, preventing the tab 101 from bending too much and breaking.

[0054] In this embodiment, the insulating member 213 is provided with a fixing groove, and the protrusion 2121 is disposed within the fixing groove and fixedly connected thereto. That is, the insulating member 213 covers three sides of the protrusion 2121. Even if the tab 101 is partially bent during bending, this ensures that the tab 101 does not come into direct contact with the plate 212, further improving safety while also increasing the connection strength between the insulating member 213 and the protrusion 2121. It is worth noting that the protrusion 2121 and the insulating member 213 are fixed by adhesive bonding, or that the protrusion 2121 is interference-fitted with the fixing groove on the insulating member 213 to prevent the insulating member 213 from falling off the protrusion 2121. No further restrictions are imposed here.

[0055] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there may be changes in the specific implementation methods and application scope. The content of this specification should not be understood as limiting the present invention.

Claims

1. A clamping mechanism for clamping and fixing a battery (100) to be tested, characterized in that: include: A heat insulating member (1), the heat insulating member (1) being sleeved outside the battery (100), and the tabs (101) of the battery (100) being passed through the heat insulating member (1); A clamping assembly (2), the clamping assembly (2) comprising two clamping plates (21), the two clamping plates (21) being configured to clamp the battery (100), the heat insulating member (1) being clamped between the clamping plates (21) and the battery (100), and the tab (101) being located between the two clamping plates (21) and spaced apart from the two clamping plates (21).

2. The clamping mechanism according to claim 1, characterized in that: At least one of the clamping plates (21) is provided with a positioning groove (211), and the heat insulating member (1) is adapted to the positioning groove (211).

3. The clamping mechanism according to claim 1, characterized in that: The thermal insulation component (1) is provided with two through-holes, and the battery (100) includes two tabs (101), one tab (101) is provided in one through-hole, and the other tab (101) is provided in the other through-hole, and the tabs (101) are fitted with the inner walls of the corresponding through-holes.

4. The clamping mechanism according to claim 1, wherein: The heat insulating element (1) comprises two half shells (11) that can be buckled together, and the two half shells (11) are detachably connected.

5. The clamping mechanism according to any one of claims 1 to 4, characterized in that: The clamping plate (21) includes a plate body (212) and an insulating member (213), wherein the plate body (212) is configured to clamp the battery (100), and the insulating member (213) is located between the plate body (212) and the tab (101).

6. The clamping mechanism according to claim 5, characterized in that: The plate body (212) is provided with a convex strip (2121) extending in the direction of the two tabs (101), and the insulating member (213) is fixedly arranged on the convex strip (2121).

7. The clamping mechanism according to claim 6, characterized in that: The insulating member (213) is provided with a fixing groove, and the protruding strip (2121) is arranged in the fixing groove and fixedly connected to the fixing groove.

8. The clamping mechanism according to any one of claims 1 to 4, characterized in that: The clamping mechanism further comprises a temperature detecting component, which is arranged inside the heat insulating component (1).

9. The clamping mechanism according to any one of claims 1 to 4, characterized in that: The clamping mechanism further comprises a fixing assembly (3), wherein the fixing assembly (3) comprises a bolt (31) and a nut (32), wherein the bolt (31) is sequentially passed through the two clamping plates (21) and is threadedly connected to the nut (32).

10. A testing device, characterized in that: The clamping mechanism comprises the clamping mechanism according to any one of claims 1 to 9, and further comprises a power supply component, wherein the power supply component is electrically connected to the battery (100), and the power supply component is configured to charge the battery (100) or discharge the battery (100).

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