NTC temperature sensor, information acquisition device and battery
By designing reinforcing components and protective sleeves, the problem of insufficient pin support strength for NTC thermistors was solved, achieving stable pin connection and improved durability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- EVE ENERGY CO LTD
- Filing Date
- 2025-06-12
- Publication Date
- 2026-05-01
AI Technical Summary
In existing technologies, the pins of NTC thermistors have poor support strength when plugged into the circuit board, making them prone to bending and affecting the installation quality of the temperature sensor.
The structure employs reinforcing components and protective sleeves, with mounting slots supporting and protecting the pins to enhance structural strength, and hot-melt connections made of polypropylene to ensure connection stability.
It improves the support strength of the pins, reduces bending, enhances installation stability and service life, and ensures convenient connection and sealing.
Smart Images
Figure CN224189388U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery technology, and in particular to an NTC temperature sensor, an information acquisition device, and a battery. Background Technology
[0002] Information acquisition from inside a battery typically employs an external component design. This means the data acquisition device is located outside the battery, with its acquisition end extending through the battery's insulating cover into the battery's interior to collect data. Currently, the data acquisition device includes a housing, circuit board, wireless transmitter, and temperature sensor. The circuit board is located inside the housing and houses the wireless transmitter. The temperature sensor is located outside the housing and extends into the battery to detect internal information. The temperature sensor usually consists of a substrate and an NTC thermistor (NTC stands for Negative Temperature Coefficient) mounted on the substrate. The NTC thermistor's leads pass through the housing and connect to the circuit board for data transmission. However, due to the limitations of the battery's internal structure, the temperature sensor is relatively thin. When the NTC thermistor's leads are inserted into the circuit board, the substrate's support strength is insufficient, easily causing both the substrate and the leads to bend simultaneously, affecting the installation quality of the temperature sensor. Utility Model Content
[0003] The purpose of this invention is to provide an NTC temperature sensor, an information acquisition device, and a battery, which have a simple structure and high electrode pin support strength and stable connection of the NTC thermistor.
[0004] To achieve this objective, the present invention adopts the following technical solution:
[0005] In a first aspect, an NTC temperature sensor is provided, comprising a sensing element, a reinforcing element, and a protective sleeve. The sensing element includes an insulating base layer, an NTC thermistor and pins arranged along a first direction on the insulating base layer, the NTC thermistor being connected to the pins, and the length of the pins extending along the first direction. The reinforcing element has a first side surface arranged along a second direction, the first side surface being provided with a mounting groove, and the mounting groove extending along the first direction and penetrating both sides of the reinforcing element along the first direction. One end of the sensing element having the pins is inserted into the mounting groove, and the first direction is perpendicular to the second direction. At least one end of the sensing element and the reinforcing element away from the pins along the first direction is disposed within the protective sleeve, and at least part of the pins are exposed outside the protective sleeve.
[0006] As a preferred embodiment of the NTC temperature sensor, along the second direction, the mounting groove has a dimension D1, the insulating base layer has a dimension D2, the pin has a dimension D3, and D2+D3≤D1.
[0007] As a preferred embodiment of the NTC temperature sensor, the mounting groove includes a first receiving groove and a second receiving groove. The first receiving groove is provided through one side of the reinforcing member along the first direction. The second receiving groove is provided through the groove wall of the first receiving groove adjacent to the first side. The insulating base layer is inserted into the first receiving groove and is hot-pressed to be fixed to the groove wall of the first receiving groove along the second direction. The pin is located in the second receiving groove.
[0008] As a preferred embodiment of the NTC temperature sensor, the insulating base layer has a second side arranged along the first direction and disposed away from the NTC thermistor, and the second side is adjacent to the pin; the reinforcing member has a third side arranged along the first direction; the sensing element is inserted into the mounting groove along the first direction; and the second side is aligned with the third side.
[0009] As a preferred embodiment of the NTC temperature sensor, the bottom of the mounting groove is provided with a positioning part, and the positioning part is adjacent to the third side. The second side is provided with a positioning groove, and the bottom of the positioning groove can abut against the positioning part.
[0010] As a preferred embodiment of the NTC temperature sensor, the sensing element further includes a transition layer. The NTC thermistor and the insulating base layer are combined to form a composite layer. The transition layer is provided on both sides of the composite layer along the second direction, and the transition layer is connected to the reinforcing member.
[0011] As a preferred embodiment of the NTC temperature sensor, the transition layer has an inclined surface, which is inclined from one end adjacent to the reinforcing member toward one end away from the reinforcing member and toward the adjacent composite layer; or...
[0012] The transition layer has a concave arc surface; and / or,
[0013] Both the transition layer and the protective sleeve are made of polypropylene.
[0014] In a second aspect, an information acquisition device is provided, including a housing, a circuit board, and an NTC temperature sensor as described above. The housing has a receiving cavity, and the circuit board is sealed within the receiving cavity. A through hole is provided on the housing. One end of the sensing element of the NTC temperature sensor, which has electrode pins, is inserted into the circuit board, and the other end extends through the through hole to the outside of the housing. At least part of the protective sleeve of the NTC temperature sensor is located outside the housing and blocks the through hole. The end of the sensing element away from the circuit board is located inside the protective sleeve.
[0015] The protective sleeve is thermally fused to the wall of the through hole; or, the housing extends outward toward the receiving cavity to form the protective sleeve.
[0016] As a preferred embodiment of the information acquisition device, the NTC temperature sensor also has a polypropylene transition layer on its sensing element, the housing is made of polypropylene, and the polypropylene transition layer is connected to the polypropylene housing.
[0017] Thirdly, a battery is provided, including a battery casing, a battery cell, and an information acquisition device as described above. The battery casing has an installation cavity, the battery cell is disposed in the installation cavity, the information acquisition device is disposed on the cavity wall of the installation cavity, and the NTC temperature sensor of the information acquisition device is attached to the battery cell.
[0018] The beneficial effects of this utility model are as follows: By setting the reinforcing member, the structural strength of the pin part of the sensing element can be effectively strengthened, thereby improving the support strength of the pin during insertion, reducing the occurrence of pin bending, and improving the installation stability of the NTC temperature sensor; by setting the mounting groove, the pin in the mounting groove is effectively protected, reducing the impact of external physical impacts on the pin, ensuring the service life of the pin, and the mounting groove has an opening to allow the pin to be soldered to the external structure, ensuring the convenience of pin connection. Attached Figure Description
[0019] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.
[0020] Figure 1 This is a schematic diagram of the structure of the NTC temperature sensor according to an embodiment of the present invention. Figure 1 ;
[0021] Figure 2 This is a schematic diagram of the structure of the NTC temperature sensor according to an embodiment of the present invention. Figure 2 ;
[0022] Figure 3 This is an exploded schematic diagram of the sensing element and the reinforcing element according to an embodiment of this utility model;
[0023] Figure 4 This is a schematic diagram of the structure of the reinforcing member according to an embodiment of the present utility model;
[0024] Figure 5 This is a schematic diagram of the structure of the information collection device according to an embodiment of the present utility model;
[0025] Figure 6 This is a cross-sectional view of the information collection device according to an embodiment of the present invention.
[0026] In the picture:
[0027] 1. Sensing element; 11. Insulating base layer; 12. NTC thermistor; 13. Pin; 14. Transition layer; 141. Inclined surface; 2. Reinforcing element; 21. First side surface; 22. Mounting groove; 221. First receiving groove; 222. Second receiving groove; 23. Positioning part; 3. Protective sleeve; 4. Housing; 41. Receiving cavity; 5. Circuit board. Detailed Implementation
[0028] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0029] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0031] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0032] like Figure 1 , Figure 2 and Figure 3 As shown, the NTC temperature sensor of this utility model embodiment includes a sensing element 1, a reinforcing element 2, and a protective sleeve 3. The sensing element 1 includes an insulating base layer 11, and an NTC thermistor 12 and pins 13 arranged along a first direction on the insulating base layer 11 (the first direction is the X direction shown in the figure). The NTC thermistor 12 is connected to the pins 13, and the length of the pins 13 extends along the first direction. The reinforcing element 2 has a first side surface 21 arranged along a second direction (the second direction is the Y direction shown in the figure). The first side surface 21 is provided with a mounting groove 22, and the mounting groove 22 extends along the first direction and penetrates both sides of the reinforcing element 2 along the first direction. One end of the sensing element 1 with pins 13 is inserted into the mounting groove 22, and the first direction is perpendicular to the second direction. At least one end of the sensing element 1 and the reinforcing element 2 away from the pins 13 along the first direction is disposed in the protective sleeve 3, and the pins 13 are at least partially exposed outside the protective sleeve 3.
[0033] Understandably, the reinforcement 2 effectively strengthens the structural strength of the pin 13 portion of the sensing element 1, thereby increasing the support strength of the pin 13 during insertion, reducing the occurrence of pin 13 bending, and improving the installation stability of the NTC temperature sensor. The mounting groove 22 effectively protects the pin 13 within it, reducing the impact of external physical impacts and ensuring the lifespan of the pin 13. Furthermore, the mounting groove 22 has an opening, and the pin 13 is at least partially exposed, allowing for soldering of the pin 13 to external structures, ensuring convenient connection. Of course, the protective sleeve 3 also effectively protects the sensing element 1, reducing the impact of external environmental corrosion and contamination, and ensuring the lifespan of the NTC temperature sensor.
[0034] It is worth noting that in this solution, the protective sleeve 3 is formed by hot pressing two protective layers. Therefore, placing the pin 13 in the mounting groove 22 can reduce the impact on the pin 13 during the hot pressing of the protective sleeve 3.
[0035] Furthermore, such as Figure 2As shown, along the second direction, the mounting groove 22 has a dimension D1, the insulating base layer 11 has a dimension D2, and the pin 13 has a dimension D3, where D2+D3≤D1. That is, one end of the insulating base layer 11 and the pin 13 inserted into the mounting groove 22 is completely within the mounting groove 22. This provides sufficient protection for the portion of the insulating base layer 11 and the pin 13, preventing the pin 13 from being exposed to the groove opening of the mounting groove 22 and suffering damage from physical impact. Furthermore, it prevents the pin 13 from being damaged by external hot-pressing structures during the hot-pressing process of the protective sleeve 3, effectively ensuring the service life of the pin 13.
[0036] Furthermore, such as Figure 3 and Figure 4 As shown, the mounting groove 22 includes a first receiving groove 221 and a second receiving groove 222. The first receiving groove 221 is provided through one side of the reinforcing member 2 along one direction. The second receiving groove 222 is provided through the groove wall of the first receiving groove 221 adjacent to the first side 21. The insulating base layer 11 is inserted into the first receiving groove 221 and is fixed by heat pressing with the groove wall of the first receiving groove 221 along the second direction. The pin 13 is located in the second receiving groove 222. On the one hand, the groove wall of the first receiving groove 221 can guide the insertion of the insulating base layer 11, improving the installation accuracy of the sensing member 1 and the reinforcing member 2. On the other hand, the two groove walls of the first receiving groove 221 along the third direction restrict the insulating base layer 11 along the third direction, and the two groove walls of the first receiving groove 221 along the second direction restrict the insulating base layer 11 along the second direction, so as to ensure the stability of the fit between the sensing member 1 and the reinforcing member 2. In addition, the pin 13 is located in the second receiving groove 222. When the insulating base layer 11 and the reinforcing member 2 are hot-pressed together along the second direction, the pin 13 is not subject to collision with the external hot-pressing machine and is not easily damaged, thus effectively ensuring the structural safety of the pin 13.
[0037] In this embodiment, both the insulating base layer 11 and the reinforcing member 2 are made of polyimide. First, polyimide is an excellent electrical insulator material, which can effectively isolate the NTC thermistor 12 from other circuits, avoiding electrical interference or short circuits, thereby improving the measurement accuracy and safety of the NTC temperature sensor.
[0038] Furthermore, the insulating base layer 11 has a second side surface arranged along the first direction and disposed away from the NTC thermistor 12, and the second side surface is adjacent to the pin 13. The reinforcing member 2 has a third side surface arranged along the first direction. The sensing element 1 is inserted into the mounting groove 22 along the first direction, and the second side surface and the third side surface are aligned. That is, the second side surface and the third side surface are aligned, which can ensure that the insulating base layer 11 and the reinforcing member 2 are precisely matched during installation, improve the connection accuracy of the sensing element 1 and the reinforcing member 2, reduce the error in the installation process, and improve the assembly efficiency of the sensing element 1 and the reinforcing member 2. In addition, the pin 13 can also be directly exposed on the third side surface to facilitate subsequent soldering with other structures, thereby improving the connection convenience of the pin 13.
[0039] Furthermore, such as Figure 3 and Figure 4 As shown, the bottom of the mounting groove 22 is provided with a positioning part 23, and the positioning part 23 is adjacent to the third side. The second side is provided with a positioning groove, and the bottom of the positioning groove can abut against the positioning part 23. The positioning groove is provided on the second side of the insulating base layer 11 and can penetrate through both sides of the insulating base layer 11 along the second direction to facilitate the opening of the positioning groove. During the insertion of the sensing element 1 along the first direction, the bottom of the positioning groove can abut against the positioning part 23. At this time, the second side and the third side are aligned. Through the cooperation of the positioning part 23 and the positioning groove, the fitting accuracy and connection efficiency of the sensing element 1 and the reinforcing member 2 are improved.
[0040] In some embodiments, such as Figure 1 As shown, the sensing element 1 further includes a transition layer 14. The NTC thermistor 12 and the insulating base layer 11 are combined to form a composite layer. The transition layer 14 is provided on both sides of the composite layer along the second direction, and the transition layer 14 is connected to the reinforcing member 2. It can be understood that there is a certain height difference between the two sides of the reinforcing member 2 along the second direction and the two sides of the composite layer along the second direction. Therefore, by providing the transition layer 14, the height difference between the side of the reinforcing member 2 away from the third side along the first direction and the composite layer can be reduced, thereby avoiding cracking between the side of the reinforcing member 2 away from the third side along the first direction and the composite layer during the heat-pressing connection of the protective sleeve 3, and ensuring the connection of the heat-pressing connection of the protective sleeve 3.
[0041] Optionally, both the transition layer 14 and the protective sleeve 3 are made of polypropylene. When the housing 4 of the subsequent information acquisition device is integrally injection molded, polypropylene is used, resulting in high connection density and reducing the likelihood of gaps. Furthermore, the transition layer 14 effectively thickens the connection between the NTC temperature sensor and the housing 4, thereby ensuring the contact area and connection strength between the NTC temperature sensor and the housing 4.
[0042] Furthermore, the transition layer 14 has an inclined surface 141, which is inclined from one end adjacent to the reinforcing member 2 toward the end away from the reinforcing member 2 and toward the adjacent composite layer. The inclined surface 141 allows for a smooth transition when the protective sleeve 3 connects the reinforcing member 2 and the sensing member 1, effectively dispersing the stress of the external hot-pressing mechanism, reducing stress concentration, and lowering the risk of cracks or damage to the NTC thermistor 12 due to excessive stress. In addition to the inclined straight surface, the transition layer 14 can also have a concave arc surface for connecting the reinforcing member 2 and the composite layer.
[0043] This utility model also provides an information collection device, such as... Figure 5 and Figure 6 As shown, the device includes a housing 4, a circuit board 5, and an NTC temperature sensor as described in any of the above embodiments. The housing 4 has a receiving cavity 41, and the circuit board 5 is sealed within the receiving cavity 41. A through hole is provided on the housing 4. One end of the sensing element 1 of the NTC temperature sensor, which has an electrode pin 13, is inserted into the circuit board 5, and the other end extends through the through hole to the outside of the housing 4. The protective sleeve 3 of the NTC temperature sensor is at least partially located outside the housing 4 and blocks the through hole. The end of the sensing element 1 away from the circuit board 5 is located inside the protective sleeve 3. The protective sleeve 3 is thermally fused to the hole wall of the through hole. That is, after the NTC temperature sensor is installed and formed, the NTC temperature sensor is inserted into the housing molding mold of the information acquisition device. Both the housing 4 and the protective sleeve 2 of the NTC temperature sensor are made of polypropylene so that the housing 4 and the protective sleeve 2 can be thermally fused seamlessly during injection molding, ensuring the sealing performance and connection strength of the connection between the housing 4 and the protective sleeve 2.
[0044] Alternatively, the housing 4 can extend outward toward the receiving cavity 41 to form a protective sleeve 3. That is, the protective sleeve 3 is generated simultaneously when the housing 4 is directly formed. Then, the sensing element 1 and the reinforcing element 2 of the NTC temperature sensor are connected to the protective sleeve 3 to ensure the sealing of the connection between the protective sleeve 3 and the housing 4.
[0045] A protective sleeve 3 for an NTC temperature sensor protrudes from one side wall of the housing 4 along the first direction, and the protective sleeve 3 extends outside the housing 4. The NTC thermistor 12 of the NTC temperature sensor is at least partially located inside the protective sleeve 3 outside the housing 4. The pins 13 of the sensing element 1 are inserted into the circuit board 5. The protective sleeve 3 for the NTC temperature sensor protrudes from one side wall of the housing 4 along the first direction, and the protective sleeve 3 extends outside the housing 4, meaning that the protective sleeve 3 and the housing 4 are made of the same material. After the NTC temperature sensor is installed and formed, the NTC temperature sensor is inserted into the housing molding mold of the information acquisition device. Both the housing 4 and the protective sleeve 3 of the NTC temperature sensor are made of polypropylene to ensure a seamless connection between the housing 4 and the protective sleeve 3 during injection molding, thus ensuring the sealing and connection strength between the housing 4 and the protective sleeve 3.
[0046] Understandably, the reinforcement 2 of the NTC temperature sensor effectively strengthens the structural support of pin 13, ensuring its support strength when it is inserted into the circuit board 5 under external force, and improving the installation stability of the NTC temperature sensor and the circuit board 5. Of course, the information acquisition device also includes a power supply battery and a wireless transmitter, which are electrically connected via the circuit board 5 to facilitate the transmission of information collected by the NTC temperature sensor.
[0047] Furthermore, the sensing element 1 of the NTC temperature sensor is also provided with a polypropylene transition layer 14, and the housing 4 is made of polypropylene, with the polypropylene transition layer 14 connected to the polypropylene housing. Both the polypropylene transition layer 14 and the polypropylene housing are made of polypropylene, which facilitates a tighter connection between the polypropylene transition layer 14 and the housing 4 during injection molding. Polypropylene has good mechanical strength, corrosion resistance, and oxidation resistance. Placing the polypropylene transition layer 14 on the sensing element 1 of the NTC temperature sensor helps improve the durability and stability of the sensing element 1, extending its service life. The good sealing between the polypropylene transition layer 14 and the housing 4 effectively prevents electrolytes and other substances from seeping into the interior of the housing 4 and affecting the safe operation of other components.
[0048] This utility model also provides a battery, including a battery casing, a battery cell, and an information acquisition device as described in any of the above embodiments. The battery casing has an installation cavity, the battery cell is disposed within the installation cavity, and the information acquisition device is disposed on the cavity wall of the installation cavity, with the NTC temperature sensor of the information acquisition device attached to the battery cell. The battery casing includes a housing and a cover, with a placement slot provided inside the housing. The battery cell is disposed within the placement slot, and the cover seals the opening of the placement slot to form the installation cavity. By placing the information acquisition device inside the battery, the information acquisition device can collect information in the electrolyte environment, thereby improving the technical problem of complex battery cover structure and insufficient reliability caused by externally placed information acquisition devices, and reducing the need for cover modifications. In addition, both the housing 4 of the information acquisition device and the protective sleeve 3 of the NTC temperature sensor are made of polypropylene. After the NTC temperature sensor is assembled, it is inserted into the molding mold of the housing 4 and then injection molded. The connection between the NTC temperature sensor and the housing 4 has high sealing performance, which can reduce the possibility of electrolyte seeping into the gap between the NTC temperature sensor and the housing 4 when the information acquisition device is placed in the battery and damaging the electrical components. This ensures the service life of the information acquisition device and the battery.
[0049] Preferably, the information acquisition device is detachably connected to the cavity wall of the mounting cavity. For example, the cavity wall of the mounting cavity is provided with a snap-fit groove, and the housing of the information acquisition device is snapped into the snap-fit groove.
[0050] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. An NTC temperature sensor, characterized in that, include: The sensing element (1) includes an insulating base layer (11), an NTC thermistor (12) and a pin (13) arranged on the insulating base layer (11) along a first direction, the NTC thermistor (12) being connected to the pin (13), and the length of the pin (13) extending along the first direction; The reinforcing member (2) has a first side surface (21) arranged along a second direction. The first side surface (21) is provided with a mounting groove (22), and the mounting groove (22) extends along the first direction and penetrates both sides of the reinforcing member (2) along the first direction. The sensing member (1) has one end of the pin (13) inserted into the mounting groove (22). The first direction is perpendicular to the second direction. The protective sleeve (3) is provided inside the protective sleeve (3), at least one end of the sensing element (1) and the reinforcing element (2) is located away from the pin (13) along the first direction, and the pin (13) is at least partially exposed outside the protective sleeve (3).
2. The NTC temperature sensor according to claim 1, characterized in that, Along the second direction, the mounting groove (22) has a dimension D1, the insulating base layer (11) has a dimension D2, and the pin (13) has a dimension D3, where D2+D3≤D1.
3. The NTC temperature sensor according to claim 2, characterized in that, The mounting groove (22) includes a first receiving groove (221) and a second receiving groove (222). The reinforcing member (2) is provided with the first receiving groove (221) through one side along the first direction. The second receiving groove (222) is provided with the first receiving groove (221) adjacent to the groove wall of the first side (21). The insulating base layer (11) is inserted into the first receiving groove (221) and is hot-pressed to be fixed with the groove wall of the first receiving groove (221) along the second direction. The pin (13) is located in the second receiving groove (222).
4. The NTC temperature sensor according to any one of claims 1-3, characterized in that, The insulating base layer (11) has a second side surface arranged along the first direction and disposed away from the NTC thermistor (12), the reinforcing member (2) has a third side surface arranged along the first direction, the sensing member (1) is inserted into the mounting groove (22) along the first direction, and the second side surface and the third side surface are aligned.
5. The NTC temperature sensor according to claim 4, characterized in that, The bottom of the mounting groove (22) is provided with a positioning part (23), and the positioning part (23) is adjacent to the third side. The second side is provided with a positioning groove, and the bottom of the positioning groove can abut against the positioning part (23).
6. The NTC temperature sensor according to any one of claims 1-3, characterized in that, The sensing element (1) further includes a transition layer (14), the NTC thermistor (12) and the insulating base layer (11) are combined to form a composite layer, the transition layer (14) is provided on both sides of the composite layer along the second direction, and the transition layer (14) is connected to the reinforcing element (2).
7. The NTC temperature sensor according to claim 6, characterized in that, The transition layer (14) has an inclined surface (141) that is inclined from one end adjacent to the reinforcing member (2) toward the end away from the reinforcing member (2) and toward the adjacent composite layer; or, The transition layer (14) has a concave arc surface; and / or, Both the transition layer (14) and the protective sleeve (3) are made of polypropylene.
8. An information acquisition device, characterized in that, The device includes a housing (4), a circuit board (5), and an NTC temperature sensor as described in any one of claims 1-7. The housing (4) has a receiving cavity (41), the circuit board (5) is sealed in the receiving cavity (41), and a through hole is provided on the housing (4). One end of the sensing element (1) of the NTC temperature sensor, which has an electrode pin (13), is inserted into the circuit board (5), and the other end extends through the through hole to the outside of the housing (4). The protective sleeve (3) of the NTC temperature sensor is at least partially located outside the housing (4) and blocks the through hole. One end of the sensing element (1) away from the circuit board (5) is located inside the protective sleeve (3). The protective sleeve (3) is thermally fused to the wall of the through hole; or, the housing (4) extends outward toward the receiving cavity (41) to form the protective sleeve (3).
9. The information acquisition device according to claim 8, characterized in that, The sensing element (1) of the NTC temperature sensor is further provided with a polypropylene transition layer, and the housing (4) is made of polypropylene. The polypropylene transition layer is connected to the polypropylene housing.
10. A battery, characterized in that, The device includes a battery casing, a battery cell, and an information acquisition device as described in claim 8 or 9. The battery casing has a mounting cavity, the battery cell is disposed in the mounting cavity, the information acquisition device is disposed on the cavity wall of the mounting cavity, and the NTC temperature sensor of the information acquisition device is attached to the battery cell.