Temperature sensing device, battery and battery pack

Abstract

The utility model provides a kind of temperature sensing device, battery and battery pack.Temperature sensing device includes bonding member and temperature sensing member, the bonding member includes base layer and bonding layer, the base layer is equipped with bonding face, the base layer is also equipped with mounting hole, the mounting hole's orifice is located in the bonding face, the bonding layer is set in the bonding face and is misaligned with the mounting hole, and the bonding layer is used to bond temperature measuring equipment;At least part of the temperature sensing member is contained in the mounting hole, to be used for contacting and detecting the temperature of the temperature measuring equipment.By setting mounting hole on base layer, part of temperature sensing member can be embedded in mounting hole, so that temperature sensing member is physically limited, the probability of lateral displacement is reduced, the shaking amplitude of temperature sensing member is reduced, so that the stability of temperature detection is improved.

Description

Technical Field

[0001] This utility model relates to the field of temperature testing technology, specifically to a temperature sensing device, a battery, and a battery pack. Background Technology

[0002] In laboratory battery cell performance testing, temperature testing is one of the most important initial tests. By monitoring the temperature change on the surface of the battery cell, we can determine the heat generation and heat distribution of the sample under non-energized test conditions. Accurate temperature change data is of great reference value for the research and development and design of battery cells.

[0003] In related technologies, high-temperature adhesive tape is usually used to fix the temperature sensing wire. However, since the temperature sensing probe of the temperature sensing wire is in the shape of a small glass bead, the adhesive tape is not firmly attached, and the temperature sensing probe is prone to shaking, causing the temperature sensing wire to fall off and resulting in temperature measurement failure. Utility Model Content

[0004] The present invention provides a temperature sensing device that can improve the technical problem of temperature sensing wires easily falling off in related technologies.

[0005] In a first aspect, embodiments of the present invention provide a temperature sensing device, comprising: An adhesive component, comprising a base layer and an adhesive layer, wherein the base layer has an adhesive surface and a mounting hole, the opening of which is located on the adhesive surface; the adhesive layer is disposed on the adhesive surface and offset from the mounting hole; the adhesive layer is used to bond a temperature measuring device; and, A temperature sensing element, at least a portion of which is housed within the mounting hole, for contacting and detecting the temperature of the device to be measured.

[0006] In one embodiment, the base layer comprises a soft material layer.

[0007] By using a soft material layer as the base layer, the elasticity of the soft material can be utilized to make it easier to install the temperature sensing element in the mounting hole. The inner wall of the mounting hole can also better conform to the shape of the temperature sensing element, providing circumferential fixation to prevent probe displacement, and the deformation of the material can buffer the stress caused by thermal expansion and contraction or external vibration, thus achieving better protection for the temperature sensing element.

[0008] In one embodiment, the soft material layer includes one of a polytetrafluoroethylene layer, a silicone layer, a fluororubber layer, a polyurethane layer, a foamed polyethylene layer, or a synthetic rubber layer.

[0009] Among them, the polytetrafluoroethylene (PTFE) layer has excellent high-temperature resistance and chemical inertness, and its surface friction coefficient is extremely low, which can prevent the adhesion of other parts; the silicone layer can withstand high temperatures, making it suitable for the high and low temperature cycling environment in cell testing, and its good elasticity allows it to tightly wrap the temperature sensing element, buffering possible mechanical vibrations. Furthermore, the silicone layer is not easily corroded by electrolytes and can be used for a long time; fluororubber also has good high-temperature resistance and corrosion resistance; the polyurethane layer has strong wear resistance and low cost, and its hardness can be easily adjusted through formulation to suit different application environments; the foamed polyethylene (PE) layer is lightweight and low-cost, and its processing is easy, facilitating the formation of mounting holes; the synthetic rubber layer combines the elasticity of rubber with the processing convenience of plastics, and is recyclable, meeting the needs of sustainable development.

[0010] In one embodiment, the adhesive further includes an extension, which is tubular, and one end of the extension is connected to the base layer; The temperature sensing element includes a probe segment and a connecting segment connected to each other. The probe segment is disposed in the mounting hole and exposed outside the adhesive layer through the mounting hole. The connecting segment is disposed inside the extension and is used for electrical connection with an external device.

[0011] The temperature sensing element is connected to external equipment via a connecting section, while the adhesive part has an extension to protect the connecting section, reduce the probability of the connecting section breaking, and prevent interference between the temperature sensing element and the temperature measuring device.

[0012] In one embodiment, the extension is integrally formed with the base layer.

[0013] The one-piece molding design eliminates the loosening or poor contact problems that may exist in traditional assembly connections, improving the mechanical stability and durability of the bonded parts. At the same time, the one-piece molding process reduces the number of parts and assembly steps, lowering production costs while avoiding the failure risks caused by welding or gluing processes.

[0014] In one embodiment, the diameter of the mounting hole is greater than or equal to 0.4 mm and less than or equal to 0.6 mm.

[0015] By setting the diameter of the mounting hole to be greater than or equal to 0.4 mm and less than or equal to 0.6 mm, the diameter of the mounting hole is made more moderate, which reduces the manufacturing cost of the temperature sensing element and the probability of interference with the temperature measuring device without affecting the temperature detection effect of the temperature sensing element.

[0016] In one embodiment, the thickness of the adhesive is greater than or equal to 0.3 mm and less than or equal to 0.5 mm.

[0017] By setting the thickness of the adhesive to be greater than or equal to 0.3 mm and less than or equal to 0.5 mm, the thickness of the adhesive is moderate, which reduces the probability of interference between the adhesive and the temperature measuring device while ensuring that the adhesive has good structural strength.

[0018] Secondly, embodiments of the present invention provide a battery, comprising: A housing, wherein a through hole is provided on the housing; The battery cell is disposed inside the housing, and the battery cell is provided with the temperature sensing device described in the foregoing embodiment. The temperature sensing element of the temperature sensing device extends out of the housing through the through hole to obtain the temperature of the battery cell.

[0019] In one embodiment, there are multiple temperature sensing devices, and all of the multiple temperature sensing devices are connected to the battery cell, and the multiple temperature sensing devices are arranged at intervals.

[0020] By employing multiple temperature sensing devices spaced apart on the surface of the battery cell, multi-point synchronous monitoring of the battery cell can be achieved. This not only allows for a comprehensive understanding of the temperature distribution in different areas of the battery cell, but also enables a more accurate assessment of the overall thermal management performance of the battery cell by comparing temperature data from different locations, thus improving the reliability and accuracy of temperature monitoring.

[0021] In one embodiment, there are multiple temperature sensing devices, and at least one of the temperature sensing devices has a temperature sensing element connected to the housing to obtain the temperature of the housing.

[0022] By placing the temperature sensing device on the casing, the battery temperature can be measured more comprehensively, thus improving the reliability of temperature detection.

[0023] Thirdly, embodiments of this utility model provide a battery, comprising: case; The battery cell, wherein the battery cell is disposed within the housing; and, A temperature sensing device, comprising an adhesive component and a temperature sensing element, wherein the adhesive component is bonded and fixed to the battery cell, the adhesive component is provided with a mounting hole, and the temperature sensing element is at least partially disposed within the mounting hole.

[0024] By providing mounting holes on the adhesive component, a portion of the temperature sensing element can be embedded within these holes, thus physically limiting the element's position, reducing the probability of lateral displacement, and minimizing its sway, thereby improving the stability of temperature detection. Furthermore, since a portion of the temperature sensing element is embedded within the adhesive component, installation of this temperature sensing device is simple; only the adhesive component needs to be bonded to the device being measured. This simplifies operation and improves the efficiency of temperature detection.

[0025] Fourthly, embodiments of the present invention provide a battery pack including the battery described in the foregoing embodiments.

[0026] The beneficial effects of the embodiments of this utility model are as follows: In embodiments of this invention, mounting holes are provided on the base layer, allowing part of the temperature sensing element to be embedded within them. This physically limits the temperature sensing element, reducing the probability of lateral displacement and minimizing its sway, thereby improving the stability of temperature detection. Furthermore, since part of the temperature sensing element is embedded within the adhesive, installation of this temperature sensing device only requires bonding the adhesive to the device to be measured, simplifying the operation and improving the efficiency of temperature detection. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the temperature sensing device provided in an embodiment of the present invention; Figure 2 yes Figure 1 A schematic diagram of the adhesive components of the temperature sensing device; Figure 3 yes Figure 1 Cross-sectional view of the temperature sensing device; Figure 4 yes Figure 3 Enlarged view of point A in the middle; Figure 5 yes Figure 1 A schematic diagram of the temperature sensing element in the medium-temperature sensing device.

[0029] The labels in the diagram are as follows: 1. Temperature sensing device; 11. Adhesive component; 111. Base layer; 1111. Adhesive surface; 1112. Mounting hole; 112. Adhesive layer; 113. Extension; 12. Temperature sensing element; 121. Probe section; 122. Connecting section. Detailed Implementation

[0030] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0031] To enable those skilled in the art to better understand the solutions of this application, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0032] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0033] Reference Figures 1 to 4 The first aspect of this utility model provides a temperature sensing device, including an adhesive component and a temperature sensing component. The adhesive component includes a base layer and an adhesive layer. The base layer has an adhesive surface and a mounting hole. The opening of the mounting hole is located on the adhesive surface. The adhesive layer is disposed on the adhesive surface and offset from the mounting hole. The adhesive layer is used to adhere the temperature measuring device. At least a portion of the temperature sensing component is housed within the mounting hole for contacting and detecting the temperature of the device to be measured.

[0034] The base layer provides support for the adhesive layer, which in turn bonds the adhesive components to the equipment being measured, thus securing the entire temperature sensing device. Mounting holes are provided on the base layer to accommodate part of the temperature sensing element. These holes are offset from the adhesive layer to prevent the adhesive layer from adhering to the temperature sensing element and affecting its measurement accuracy. The temperature sensing element is used to detect the temperature of the equipment. It can be an NTC thermistor (Negative Temperature Coefficient thermistor) or a thermocouple, offering a small size and fast response, facilitating the measurement of the temperature at a specific point on the equipment.

[0035] In this embodiment of the invention, mounting holes are provided on the base layer, allowing part of the temperature sensing element to be embedded in the mounting holes. This physically limits the temperature sensing element, reducing the probability of lateral displacement and minimizing the shaking amplitude of the temperature sensing element, thereby improving the stability of temperature detection. Furthermore, since part of the temperature sensing element is embedded in the adhesive, installation of this temperature sensing device only requires bonding the adhesive to the device to be measured, simplifying the operation and improving the efficiency of temperature detection.

[0036] In one embodiment, the base layer comprises a soft material layer.

[0037] When a soft material layer is used as the base layer, its elasticity makes it easier to install the temperature sensor in the mounting hole. The inner wall of the mounting hole can also better conform to the shape of the temperature sensor, providing circumferential fixation to prevent probe displacement and buffering stress caused by thermal expansion and contraction or external vibrations through material deformation, thus achieving better protection for the temperature sensor. Furthermore, the flexibility of the soft material layer allows the adhesive to conform to the curvature of the battery cell or other equipment surface, increasing the bonding area and further improving the stability of temperature detection and bonding durability.

[0038] In one embodiment, the soft material layer includes one of a polytetrafluoroethylene layer, a silicone layer, a fluororubber layer, a polyurethane layer, a foamed polyethylene layer, or a synthetic rubber layer.

[0039] Among them, the polytetrafluoroethylene (PTFE) layer has excellent high-temperature resistance and chemical inertness, and its surface friction coefficient is extremely low, which can prevent the adhesion of other parts; the silicone layer can withstand high temperatures, making it suitable for the high and low temperature cycling environment in cell testing, and its good elasticity allows it to tightly wrap the temperature sensing element, buffering possible mechanical vibrations. Furthermore, the silicone layer is not easily corroded by electrolytes and can be used for a long time; fluororubber also has good high-temperature resistance and corrosion resistance; the polyurethane layer has strong wear resistance and low cost, and its hardness can be easily adjusted through formulation to suit different application environments; the foamed polyethylene (PE) layer is lightweight and low-cost, and its processing is easy, facilitating the formation of mounting holes; the synthetic rubber layer combines the elasticity of rubber with the processing convenience of plastics, and is recyclable, meeting the needs of sustainable development.

[0040] In one embodiment, reference is made to Figures 1 to 5 The adhesive further includes an extension portion, which is tubular, and one end of the extension portion is connected to the base layer; the temperature sensing element includes a probe segment and a connecting segment connected to each other, the probe segment is disposed in the mounting hole and exposed outside the adhesive layer through the mounting hole, and the connecting segment is disposed inside the extension portion and is used for electrical connection with external devices.

[0041] To display the temperature changes detected by the temperature sensing element, the temperature sensing element usually needs to be connected to external devices, such as temperature transmitters or programmable logic controllers. Therefore, in this embodiment of the invention, the temperature sensing element is provided with a connecting section to connect to the external device, and the adhesive is provided with an extension to protect the connecting section, reduce the probability of the connecting section breaking, and prevent interference between the temperature sensing element and the device to be measured.

[0042] In some alternative implementations, the extension is made of insulating material to insulate the connection section from other structures of the temperature measuring device, further reducing the probability of interference between the temperature sensing element and the temperature measuring device.

[0043] In one embodiment, the extension is integrally formed with the base layer. This integral forming design eliminates the loosening or poor contact problems that may exist in traditional assembly-type connections, improving the mechanical stability and durability of the bonded component. Simultaneously, the integral forming process reduces the number of parts and assembly steps, lowering production costs while avoiding the failure risks associated with welding or gluing processes.

[0044] In one embodiment, the diameter of the mounting hole is greater than or equal to 0.4 mm and less than or equal to 0.6 mm.

[0045] If the diameter of the mounting hole is less than 0.4mm, the hole is too small, accommodating a small temperature sensing element, which significantly impacts the manufacturing requirements and sensitivity of the element. If the diameter is greater than 0.6mm, a larger sensing element is required, which can easily interfere with the device being measured and increases costs. Therefore, this embodiment sets the diameter of the mounting hole to be greater than or equal to 0.4mm and less than or equal to 0.6mm. Examples include 0.4mm, 0.42mm, 0.44mm, 0.46mm, 0.48mm, 0.5mm, 0.52mm, 0.54mm, 0.56mm, 0.58mm, and 0.6mm, making the diameter of the mounting hole more moderate. This reduces the manufacturing cost of the sensing element and the probability of interference with the device being measured without affecting its temperature detection performance.

[0046] In one embodiment, the thickness of the adhesive is greater than or equal to 0.3 mm and less than or equal to 0.5 mm.

[0047] If the thickness of the adhesive is less than 0.3mm, the adhesive layer is too thin and lacks adhesion, or the base layer is too thin and has low strength, making it prone to breakage. If the thickness of the adhesive is 0.5mm, it is too thick, making the installation of the temperature sensing device difficult, especially in situations where the temperature sensing device needs to be installed inside the equipment being measured, thus reducing the applicability of the temperature sensing device. Therefore, this embodiment of the invention sets the thickness of the adhesive to be greater than or equal to 0.3mm and less than or equal to 0.5mm. For example, it can be 0.3mm, 0.32mm, 0.34mm, 0.36mm, 0.38mm, 0.4mm, 0.42mm, 0.44mm, 0.46mm, 0.48mm, 0.5mm, etc., making the thickness of the adhesive moderate. This ensures that the adhesive has good structural strength while reducing the probability of interference between the adhesive and the equipment being measured.

[0048] According to a second aspect of this utility model, a battery is provided, comprising a casing and a battery cell. The casing has a through hole. The battery cell is disposed within the casing and is provided with the aforementioned temperature sensing device. The temperature sensing element of the temperature sensing device extends out of the casing through the through hole to obtain the temperature of the battery cell. This battery includes the temperature sensing device of the foregoing embodiments, and therefore possesses all the beneficial effects of the aforementioned temperature sensing device. Further details of the embodiments of this utility model will not be repeated here. The through hole can be configured as a circular or square channel matching the size of the temperature sensing element. The through hole is preferably located near the heat-concentrating area of ​​the battery cell (such as the tab or center), facilitating temperature monitoring and the assembly of the temperature sensing device.

[0049] In some alternative implementations, an insulating sealing ring is added to the inner wall of the through hole to prevent external dust, water mist, etc. from entering the housing and reduce the probability of short circuit caused by contact between the temperature sensing element and the metal housing.

[0050] In one embodiment, there are multiple temperature sensing devices, all of which are connected to the battery cell and are spaced apart. This arrangement of multiple temperature sensing devices spaced apart on the battery cell surface enables multi-point synchronous monitoring of the battery cell. This not only provides a comprehensive understanding of the temperature distribution in different areas of the battery cell but also allows for a more accurate assessment of the overall thermal management performance of the battery cell by comparing temperature data from different locations, thus improving the reliability and accuracy of temperature monitoring. Furthermore, the data from multiple temperature sensing devices can be cross-referenced, further enhancing the accuracy of temperature measurement.

[0051] In one embodiment, there are multiple temperature sensing devices, and at least one of the temperature sensing devices has its sensing element connected to the housing to obtain the temperature of the housing. The temperature sensing devices are mounted on the housing, allowing for more comprehensive measurement of the battery temperature and improving the reliability of temperature detection.

[0052] According to a third aspect of the present invention, another battery is provided, comprising a casing, a battery cell, and a temperature sensing device, wherein the battery cell is disposed within the casing; the temperature sensing device comprises an adhesive component and a temperature sensing element, wherein the adhesive component is bonded and fixed to the battery cell, the adhesive component is provided with a mounting hole, and the temperature sensing element is at least partially disposed within the mounting hole.

[0053] By providing mounting holes on the adhesive component, a portion of the temperature sensing element can be embedded within these holes, thus physically limiting the element's position, reducing the probability of lateral displacement, and minimizing its sway, thereby improving the stability of temperature detection. Furthermore, since a portion of the temperature sensing element is embedded within the adhesive component, installation of this temperature sensing device is simple; only the adhesive component needs to be bonded to the device being measured. This simplifies operation and improves the efficiency of temperature detection.

[0054] According to a fourth aspect of the present invention, a battery pack is provided, comprising the battery described in the foregoing embodiments. Since the battery pack includes the battery described in the foregoing embodiments, it possesses all the beneficial effects of the aforementioned battery; further details of the embodiments of the present invention will not be repeated here.

[0055] According to a fifth aspect of this utility model, a vehicle is provided that includes the battery or battery pack described in the foregoing embodiments. Therefore, the vehicle possesses all the beneficial effects of the aforementioned battery or battery pack, and the embodiments of this utility model will not be repeated here. The vehicle may be a gasoline-powered vehicle, a plug-in hybrid electric vehicle, or a new energy vehicle, etc., and this application does not specifically limit it in this regard.

[0056] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0057] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0058] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0059] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A temperature sensing device, characterized in that, include: An adhesive component, comprising a base layer and an adhesive layer, wherein the base layer has an adhesive surface and a mounting hole, the opening of which is located on the adhesive surface; the adhesive layer is disposed on the adhesive surface and offset from the mounting hole; the adhesive layer is used to bond a temperature measuring device; and, A temperature sensing element, at least a portion of which is housed within the mounting hole, for contacting and detecting the temperature of the device to be measured.

2. The temperature sensing device according to claim 1, characterized in that, The base layer includes a soft material layer.

3. The temperature sensing device according to claim 1 or 2, characterized in that, The adhesive also includes an extension, which is tubular, and one end of the extension is connected to the base layer. The temperature sensing element includes a probe segment and a connecting segment connected to each other. The probe segment is disposed in the mounting hole and exposed outside the adhesive layer through the mounting hole. The connecting segment is disposed inside the extension and is used for electrical connection with an external device.

4. The temperature sensing device according to claim 3, characterized in that, The extension is integrally formed with the base layer.

5. The temperature sensing device according to claim 1 or 2, characterized in that, The diameter of the mounting hole is greater than or equal to 0.4 mm and less than or equal to 0.6 mm; and / or, The thickness of the adhesive is greater than or equal to 0.3 mm and less than or equal to 0.5 mm.

6. A battery, characterized in that, include: A housing, wherein a through hole is provided on the housing; A battery cell, wherein the battery cell is disposed within the housing, and the battery cell is provided with a temperature sensing device as described in any one of claims 1 to 5, wherein the temperature sensing element of the temperature sensing device extends out of the housing through the through hole to obtain the temperature of the battery cell.

7. The battery according to claim 6, characterized in that, There are multiple temperature sensing devices, and all of the multiple temperature sensing devices are connected to the battery cell, and the multiple temperature sensing devices are arranged at intervals.

8. The battery according to claim 6, characterized in that, There are multiple temperature sensing devices, and at least one of the temperature sensing devices has its sensing element connected to the housing to obtain the temperature of the housing.

9. A battery, characterized in that, include: case; A battery cell, wherein the battery cell is disposed within the housing; and, A temperature sensing device, comprising an adhesive component and a temperature sensing element, wherein the adhesive component is bonded and fixed to the battery cell, the adhesive component is provided with a mounting hole, and the temperature sensing element is at least partially disposed within the mounting hole.

10. A battery pack, characterized in that, Includes the battery as described in any one of claims 6 to 9.

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