Battery cell temperature detection device

Abstract

The utility model discloses a cell temperature detection apparatus, comprising a clamping assembly comprising a first clamping plate and a second clamping plate which are oppositely arranged, and a cell to be detected is accommodated between the first clamping plate and the second clamping plate; the connecting assembly comprises a first connecting piece, and the clamping assembly and the to-be-tested battery cell are fixedly connected through the first connecting piece; the temperature sensing assembly comprises a temperature sensing element and temperature detection equipment; wherein a first groove is formed in the side, close to the to-be-detected battery cell, of the first clamping plate, one end of the temperature sensing element is arranged in the first groove and attached to the to-be-detected battery cell, and the other end of the temperature sensing element is electrically connected with the temperature detection equipment. According to the battery cell temperature detection device, the temperature sensing element is arranged in the first groove and abuts against the to-be-detected battery cell, the first groove enables the temperature sensing element not to protrude out of the contact surface of the first clamping plate and the to-be-detected battery cell, the to-be-detected battery cell is prevented from being scratched, meanwhile, it is guaranteed that the to-be-detected battery cell is clamped, and the temperature detection effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery testing, and in particular to a cell temperature detection device and a cell testing system. Background Technology

[0002] Lithium batteries typically require aluminum or steel clamps for restraint during testing. When ordinary clamps are used for temperature detection, the temperature sensing wire is often directly attached to the cell before clamping. When the restraint force is too great, it can easily damage the temperature sensing wire, the aluminum-plastic film of the cell, or the casing, leading to abnormal temperature monitoring on a large scale of the cell, or even puncturing the aluminum-plastic film and causing leakage, resulting in a safety accident.

[0003] Therefore, a new type of battery cell temperature detection device is needed. Utility Model Content

[0004] The technical problem to be solved by this utility model embodiment is to provide a battery cell temperature detection device that can avoid damaging the temperature sensing component or the battery cell during temperature detection.

[0005] To address the aforementioned technical problems, this utility model provides a battery cell temperature detection device, comprising: a clamping assembly including a first clamping plate and a second clamping plate disposed opposite to each other, wherein the battery cell to be tested is accommodated between the first clamping plate and the second clamping plate; a connecting assembly including a first connector, wherein the clamping assembly and the battery cell to be tested are fixedly connected via the first connector; and a temperature sensing assembly including a temperature sensing element and a temperature detection device; wherein a first groove is formed on the side of the first clamping plate near the battery cell to be tested, one end of the temperature sensing element is disposed within the first groove and conforms to the battery cell to be tested, and the other end is electrically connected to the temperature detection device. In a feasible implementation, the connecting assembly further includes a second connector, wherein the temperature sensing element is connected to the first groove via the second connector, preferably, the second connector is disposed within the first groove.

[0006] In one feasible implementation, the connection assembly further includes a third connector, through which the temperature sensing element is connected to the side wall of the first clamping plate. Preferably, the third connector is disposed on the side wall of the first clamping plate.

[0007] In one feasible implementation, a second groove is also formed on the side of the first clamping plate near the second clamping plate, and the second groove is arranged to intersect with the first groove.

[0008] In one feasible implementation, the first groove extends through the middle of the width direction of the first clamping plate along a length direction parallel to the length direction of the first clamping plate; the second groove extends through the middle of the length direction of the first clamping plate along a width direction parallel to the width direction of the first clamping plate.

[0009] In one feasible implementation, the projection length of the second groove on the side of the first clamping plate near the second clamping plate is d1, the projection length of the battery cell under test on the side of the first clamping plate near the second clamping plate is d2, and the width of the first clamping plate is d3, wherein d3≥d1≥d2.

[0010] In one feasible implementation, the first groove is a rectangular groove or an arc-shaped groove.

[0011] In one feasible implementation, the width of the first groove is 2mm-3mm and the depth of the first groove is 2mm-3mm.

[0012] In one feasible implementation, the first clamping plate and the second clamping plate are rectangular plates or arc-shaped plates with curved sides.

[0013] In one feasible implementation, the first connecting member is a bolt.

[0014] The present invention has the following beneficial effects:

[0015] The battery cell temperature detection device provided in this application embodiment has a first groove formed on the first clamping plate, in which a temperature sensing element is housed and attached to the surface of the battery cell to be tested. The temperature sensing element abuts against the battery cell through the first groove, which prevents the temperature sensing element from protruding from the contact surface between the first clamping plate and the battery cell. This avoids scratching the battery cell while ensuring that the battery cell is clamped securely. This allows for accurate and precise detection of the surface temperature of the battery cell, while also preventing high-voltage damage to the temperature sensing element or the battery cell from the clamping plate, thus avoiding temperature measurement failure, improving temperature detection efficiency, and facilitating widespread application.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application, and do not constitute an undue limitation of this application.

[0018] Figure 1 This is a three-dimensional structural diagram of the battery cell temperature detection device after clamping the battery cell to be tested, as shown in some embodiments of this application;

[0019] Figure 2 This is a three-dimensional structural diagram of the battery cell temperature detection device shown in some embodiments of this application after removing some components;

[0020] Figure 3 This is a three-dimensional structural schematic diagram of the first clamping plate of the cell temperature detection device shown in some embodiments of this application;

[0021] Figure 4 This is a three-dimensional structural schematic diagram of the first clamping plate of the cell temperature detection device shown in some other embodiments of this application.

[0022] The reference numerals in the figure:

[0023] 110 - First clamping plate, 111 - First groove, 112 - Second groove

[0024] 120 - Second clamping plate,

[0025] 130 - Connecting assembly, 131 - Bolt, 132 - Screw hole

[0026] 140 - Temperature sensing assembly, 141 - Temperature sensing element, A - Sealing point

[0027] 200 - Cell under test. Detailed Implementation

[0028] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0029] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0031] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0032] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] This application provides a battery cell temperature detection device for monitoring battery cell temperature or providing battery cell temperature detection during battery cell performance testing. Please refer to... Figures 1 to 4 The battery cell temperature detection device provided in this embodiment includes: a clamping assembly, a connecting assembly, and a temperature sensing assembly. The clamping assembly includes: a first clamping plate 110 and a second clamping plate 120 disposed opposite to each other, with the battery cell 200 to be tested housed between the first clamping plate 110 and the second clamping plate 120; the connecting assembly includes: a first connector 130, with the clamping assembly and the battery cell 200 to be tested fixedly connected by the first connector 130; the temperature sensing assembly 140 includes a temperature sensing element 141 and a temperature detection device; wherein, the first clamping plate 110 has a first groove 111 on the side near the battery cell 200 to be tested, one end of the temperature sensing element 141 is disposed in the first groove 111 and fits against the battery cell 200 to be tested, and the other end is electrically connected to the temperature detection device.

[0034] The battery cell temperature detection device provided in this application embodiment has a first groove 111 on the first clamping plate 110. The temperature sensing element 141 is housed in the first groove 111 and fits against the surface of the battery cell 200 to be tested. The temperature sensing element 141 abuts against the battery cell 200 to be tested through the first groove 111, so that the temperature sensing element 141 does not protrude from the contact surface between the first clamping plate 110 and the battery cell 200 to be tested. This avoids scratching the battery cell 200 to be tested while ensuring that the battery cell 200 to be tested is clamped tightly. It can accurately detect the surface temperature of the battery cell 200 to be tested, and prevent the high voltage of the clamping plate from damaging the temperature sensing element or the battery cell, avoiding temperature measurement failure, improving temperature detection efficiency, and facilitating wide application.

[0035] In one feasible implementation, the temperature sensing element 141 can be a temperature sensing wire. Temperature sensing wires are also known as temperature sensor wires or thermistor wires. Temperature sensing wires offer very high measurement accuracy and typically have a faster response time compared to traditional thermometers, reflecting temperature changes more quickly. They can be easily bent, wound, or laid on objects of different shapes, making them ideal for placement in recessed structures and allowing for bending according to the shape of the recess. For applications requiring long-distance signal transmission, temperature sensing wires can be designed to support longer cable lengths while maintaining good signal quality. They can be directly connected to control systems or other electronic devices for easy data acquisition and processing. High-quality temperature sensing wires are designed to withstand harsh operating conditions, including high and low temperatures, vibration, and chemical corrosion, ensuring long-term stable performance. Compared to other types of temperature detection methods, such as infrared thermometers, temperature monitoring using temperature sensing wires is generally less costly. With appropriate wiring, single or multiple temperature sensing wires can achieve temperature monitoring at multiple locations within the same system, enabling multi-point monitoring and reducing installation and maintenance costs. Combined with advanced data processing software, temperature sensing lines can be used to build intelligent monitoring systems, enabling functions such as automatic alarms and data analysis, thereby improving overall operational efficiency.

[0036] In one feasible implementation, the connection assembly includes a second connector, through which the temperature sensing element 141 is connected to the first groove 111.

[0037] In a further implementation, the second connector is disposed within the first groove 111.

[0038] The temperature sensing element 141 is connected to the first groove 111 via the second connector to prevent the temperature measuring point from shifting. This ensures that each measurement is performed at a precise, defined location, reducing temperature reading deviations caused by changes in the position of the temperature sensing element 141 and thus improving the accuracy of temperature monitoring. Furthermore, the second connector can be double-sided adhesive or other components that can fix the temperature sensing element 141 in place.

[0039] In this implementation, the second connector can be double-sided tape. Alternatively, the double-sided tape can be first applied to the area where the temperature sensing element 141 needs to be fixed, and then the temperature sensing element 141 can be attached to the first groove 111. Or, the double-sided tape can be first applied to the point in the first groove 111 where temperature measurement is required, and then the temperature sensing element 141 can be placed on the double-sided tape within the first groove 111. This implementation allows for quick identification of the temperature measurement point by applying the double-sided tape to the first groove 111, and also facilitates easy replacement of the temperature measurement point.

[0040] In one feasible implementation, the connection assembly includes a third connector through which the temperature sensing element 141 is connected to the sidewall of the first clamping plate 110.

[0041] In a further implementation, a third connector is disposed on the side wall of the first clamping plate 110.

[0042] The temperature sensing element 141 is connected to the side wall of the first clamping plate 110 via a third connector, which also prevents the temperature measuring point from moving. By setting the third connector, the temperature sensing element 141 is fixed to the side wall of the first clamping plate 110, thus fixing the temperature measuring point. This means that the collected data is more consistent and reliable, which is especially important for applications that require long-term tracking of temperature changes or trend analysis, particularly in battery performance testing systems. Furthermore, the third connector can be a sealant or other components that can fix the temperature sensing element 141.

[0043] In this implementation, the third connector can be a sealant. The temperature sensing element 141 can be placed into the corresponding temperature measurement point within the first groove 111, and then the temperature sensing element 141 can be fixedly connected to the first clamping plate 110 via sealing point A. For example, as... Figure 2 As shown, sealing point A only needs to ensure that the temperature sensing element 141 is fixedly connected to the side wall of the first clamping plate 110.

[0044] In one feasible implementation, a second groove 112 is also provided on the side of the first clamping plate 110 near the second clamping plate 120, and the second groove 112 is arranged to intersect with the first groove 111.

[0045] By setting the first groove 111 and the second groove 112 to intersect, the temperature sensing element 141 can enter the second groove 112 from the first groove 111 through the intersection point, thereby improving the detection capability from a single straight line to two straight lines, realizing the improvement from a "detection line" to a "detection surface", greatly expanding the temperature detection range and improving the efficiency of temperature detection.

[0046] In one feasible implementation, the first groove extends through the middle of the width direction of the first clamping plate along a length direction parallel to the length direction of the first clamping plate; the second groove extends through the middle of the length direction of the first clamping plate along a width direction parallel to the width direction of the first clamping plate.

[0047] Different applications may require special attention to different areas of the battery cell. For example, in some cases, the edge areas may be more prone to overheating, while in others, the central area may be more critical. This design allows users to adjust the position of the temperature sensing component 140 according to specific needs, thereby better meeting the requirements of specific applications.

[0048] In one feasible implementation, the projection length of the second groove on the side of the first clamping plate near the second clamping plate is d1, the projection length of the battery cell under test on the side of the first clamping plate near the second clamping plate is d2, and the width of the first clamping plate is d3, wherein d3≥d1≥d2.

[0049] In this way, the temperature detection range of the first groove 111 and the second groove 112 on the side of the first clamping plate 110 close to the cell 200 under test is maximized, achieving the optimal temperature detection range.

[0050] In a feasible implementation, such as Figure 3 and Figure 4 As shown, the first groove 111 is a rectangular groove or an arc-shaped groove.

[0051] Rectangular slots are relatively simple to manufacture and can be produced using standard machining methods (such as milling and stamping), reducing production costs. Rectangular slots provide clear boundaries and positioning points, making it easier to align and insert the temperature sensing component. This helps improve assembly efficiency and consistency. Due to the relatively regular size and shape of rectangular slots, standardized designs can be easily achieved, facilitating mass production and component interchangeability. In limited spaces, rectangular slots can utilize space more effectively, especially in applications requiring compact layouts. Rectangular slots typically provide better lateral support, reducing lateral movement of the temperature sensing component and ensuring measurement stability. Curved slots, on the other hand, better adapt to the curved surfaces of battery cells or other objects being measured, especially in battery packs where the cells may have a degree of curvature. The design of curved slots ensures a tight fit between the temperature sensing component and the cell surface, increasing contact area and heat transfer efficiency. Curved slots can better distribute clamping forces, preventing cell deformation or damage caused by localized overvoltage. This is crucial for protecting the cell itself.

[0052] In one feasible implementation, the width of the first groove is 2mm-3mm and the depth of the first groove is 2mm-3mm.

[0053] This relatively small size makes the entire temperature detection device more compact, effectively utilizing limited space. The 2mm-3mm width and depth provide sufficient space to accommodate the temperature sensing component 140 while maintaining good fixation. This size avoids compromising structural strength due to excessive width, and prevents installation difficulties or instability due to excessive narrowness. The 2mm-3mm size range is suitable for standard machining methods such as milling and stamping, offering high precision and low cost. This helps reduce production costs and improve production efficiency. The groove size within this range can accommodate various types of temperature sensing elements 141, increasing the device's flexibility and applicability. Appropriate groove dimensions ensure good contact between the temperature sensing element 141 and the cell surface, improving heat transfer efficiency. The 2mm-3mm depth and width provide sufficient contact area, allowing the temperature sensing element 141 to accurately measure the cell surface temperature. The relatively small groove opening reduces the possibility of dust and other foreign matter entering, protecting the temperature sensing component 140 from contamination and extending its service life. The appropriately sized groove facilitates cleaning and maintenance. Correspondingly, the width and depth of the second groove 112 can be the same as those of the first groove 111. In this way, in addition to having all the advantages of the first groove 111, it can also facilitate the processing of the plate material, facilitate the processing and manufacturing of the cell temperature detection device, and is conducive to large-scale production and wide application.

[0054] In one feasible implementation, the first clamping plate 110 and the second clamping plate 120 are rectangular plates or, for example,... Figure 3 or Figure 4 The arc-shaped plate shown has multiple protruding arc-shaped structures on its edge, so that the main body of the first clamping plate 110 and the second clamping plate 120 can cover the battery cell 200 to be tested. The multiple protruding arc-shaped structures on the edge are set according to the connector, which can save the amount of plate material and save costs. At the same time, the arc-shaped side is more convenient to use and transport.

[0055] The second clamping plate 120 can have the same structure as the first clamping plate 110, also with grooves for placing temperature sensing elements. Thus, both the first and second clamping plates 110 and 120 can have temperature sensing elements, allowing simultaneous detection and monitoring of the temperature of both surfaces of the battery cell 200 under test. This is crucial for ensuring the uniformity of heat distribution throughout the battery cell. The grooves on the second clamping plate 120 can be positioned opposite to those on the first clamping plate, allowing the two temperature sensing elements to serve as a reference and preventing one from malfunctioning. Alternatively, the grooves on the second clamping plate 120 can be staggered with those on the first clamping plate, allowing the temperature sensing elements to detect different locations on the battery cell 200 under test, further improving the efficiency of temperature detection. The second clamping plate 120 can also be a rectangular plate or an arc-shaped plate with curved sides, without grooves.

[0056] In one feasible implementation, please refer to Figures 1 to 4 The first connecting member is a bolt 131. Correspondingly, the first clamping plate 110 and the second clamping plate 120 have a plurality of screw holes 132 corresponding to the bolt 131. The plurality of screw holes 132 can be arranged in pairs in the width direction of the cell temperature detection device, so that the cell 200 to be tested can be firmly fixed between the first clamping plate 110 and the second clamping plate 120 using the bolt 131. This symmetrical fixing method can provide a more uniform and stable clamping force, reducing the displacement or loosening that may be caused by single-point fixing. The paired screw holes 132 can ensure that the cell temperature detection device maintains good level and parallelism during installation, thereby ensuring the consistency and accuracy of temperature measurement, and also avoiding overvoltage damage to the cell 200 to be tested. At the same time, the paired screw holes 132 allow adjustment according to the specific size of the cell, so that the same temperature detection device can be used for a variety of different specifications of cells, improving the versatility and flexibility of the equipment. Using standard bolts 131 and nuts for fixing is simple and quick, without the need for complicated tools or techniques. This not only speeds up installation but also reduces the risk of installation errors. After testing, the battery can be easily disassembled by loosening bolt 131 without damaging the battery cell or other components. This reversible design facilitates routine testing and maintenance. The structure secured by screw holes 132 is more robust and durable than adhesive or other temporary fixing methods, maintaining good performance over long-term use and reducing the risk of failure due to fastener failure. The paired screw holes 132 help distribute clamping force evenly, preventing localized overvoltage that could damage or deform the battery cell surface. The positions of the screw holes 132 are pre-set, allowing for quick and accurate positioning of the first clamping plate 110 and the second clamping plate 120 during installation, eliminating the need for additional time to find the appropriate installation location.

[0057] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An electric cell temperature detecting device characterized by comprising: include: The clamping assembly includes a first clamping plate and a second clamping plate disposed opposite to each other, and the battery cell to be tested is accommodated between the first clamping plate and the second clamping plate; A connection component includes a first connector, wherein the clamping component and the cell under test are fixedly connected through the first connector; Temperature sensing components, including temperature sensing elements and temperature detection devices; The first clamping plate has a first groove on the side near the battery cell under test. One end of the temperature sensing element is disposed in the first groove and fits against the battery cell under test, and the other end is electrically connected to the temperature detection device.

2. The battery cell temperature detection device according to claim 1, characterized by The connection assembly further includes a second connector, through which the temperature sensing element is connected to the first groove.

3. The battery cell temperature detection apparatus according to claim 1, characterized by The connection assembly further includes a third connector, through which the temperature sensing element is connected to the side wall of the first clamping plate.

4. The battery cell temperature detection apparatus according to claim 1, characterized by A second groove is also provided on the side of the first clamping plate near the second clamping plate, and the second groove is arranged to intersect with the first groove.

5. The battery cell temperature detection apparatus according to claim 4, characterized by The first groove extends through the middle of the width direction of the first clamping plate, parallel to the length direction of the first clamping plate. The second groove is disposed at the middle of the length direction of the first clamping plate, parallel to the width direction of the first clamping plate.

6. The battery cell temperature detection apparatus according to claim 4, characterized by The projection length of the second groove on the side of the first clamping plate near the second clamping plate is d1, the projection length of the cell under test on the side of the first clamping plate near the second clamping plate is d2, and the width of the first clamping plate is d3, wherein d3≥d1≥d2.

7. The battery cell temperature detection apparatus according to claim 1, characterized by The first groove is a rectangular groove or an arc groove.

8. The battery cell temperature detection apparatus according to claim 1, characterized by The width of the first groove is 2mm-3mm, and the depth of the first groove is 2mm-3mm.

9. The battery cell temperature detection apparatus according to claim 1, characterized by The first clamping plate and the second clamping plate are rectangular plates or arc-shaped plates with curved sides.

10. The battery cell temperature detection apparatus according to claim 1, characterized by The first connecting component is a bolt.

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