Battery cell assembly and battery pack
By connecting the sampling bracket to the battery cell through surface contact, and combining the slot snap-fit and adhesive methods, the problem of unstable fixing of the battery cell temperature detection device is solved, thereby improving the stability and detection accuracy of the temperature sensor.
Patent Information
- Application Number
- CN202423079594.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-12-12
AI Technical Summary
Existing cell temperature detection devices are not securely fixed to the cells, making them prone to displacement or detachment, which affects the timeliness and accuracy of temperature detection.
The sampling bracket with surface contact is used to connect with the temperature sensor and the battery cell. It is fixed by a combination of slot snap-fit and adhesive to enhance stability. Thermally conductive adhesive is used to fix the contact point between the temperature measuring part and the battery cell to ensure heat transfer efficiency.
This improves the stability and accuracy of the temperature sensor, preventing displacement or detachment and enhancing the reliability and accuracy of temperature detection.
Smart Images
Figure CN223625035U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery temperature measurement technology, and in particular to a battery cell assembly and battery pack. Background Technology
[0002] With the continuous development of battery technology, battery cells are being used more and more widely in various electronic devices and electric vehicles. However, battery cells generate heat during charging and discharging. If the temperature of the battery cells is not monitored in a timely and accurate manner, the temperature may become too high, which may lead to performance degradation, shortened lifespan, or even safety issues.
[0003] Currently, existing methods for temperature detection of battery cells typically involve attaching a temperature sensing device to the cell and then using thermally conductive adhesive to fix the device in place. However, the sampling structure of existing temperature sensing devices is planar, while the cylindrical surface of the battery cell is curved. When a planar temperature sensing device is attached to the curved surface of the battery cell using thermally conductive adhesive, the contact area between the two is small, affecting the timeliness and accuracy of temperature detection. Furthermore, connecting the battery cell and the temperature sensing device solely through thermally conductive adhesive results in a weak connection. Under long-term use or in environments with vibration, the temperature sensor is prone to displacement or detachment, making continuous and effective temperature monitoring impossible. Utility Model Content
[0004] Therefore, it is necessary to provide a cell assembly and battery pack that can achieve effective temperature detection.
[0005] To solve the above-mentioned technical problems, this application provides the following technical solution:
[0006] A battery cell assembly, comprising:
[0007] The battery cell has a cylindrical surface;
[0008] A temperature sensor, electrically connected to the battery cell, is used to detect the temperature of the battery cell; the temperature sensor has a mounting surface.
[0009] The sampling bracket is attached to the cylindrical surface in a surface-to-surface manner and connected to the battery cell. The sampling bracket includes a support plate, and the sampling bracket can be attached to the mounting plane and connected to the temperature sensor through the support plate.
[0010] Understandably, the temperature sensor is fixed to the battery cell via a sampling bracket. The sampling bracket, temperature sensor, and battery cell are attached and connected through surface-to-surface contact. This improves the stability of the temperature sensor when it is fixed to the battery cell via the sampling bracket, preventing the temperature sensor from shifting or falling off the battery cell. On the other hand, it also ensures the contact area between the temperature sensor and the battery cell, which is beneficial to improving the accuracy and reliability of temperature detection.
[0011] In one embodiment, the sampling bracket further includes a card plate, which is disposed at the location of the support plate, and the card plate and the support plate can be closed to form a card slot;
[0012] The temperature sensor can be engaged with the slot to fix the temperature sensor to the sampling bracket.
[0013] Understandably, by setting a card plate on the support plate and forming a card slot with the support plate, the temperature sensor is assembled onto the sampling bracket through the snap-fit engagement between the temperature sensor and the card slot, making assembly more convenient.
[0014] In one embodiment, the support plate is flat.
[0015] In one embodiment, the sampling bracket has a connecting curved plate, and the sampling bracket can be attached to the cylindrical surface via the connecting curved plate and connected to the cylindrical surface by adhesive means.
[0016] It is understandable that fixing the sampling bracket to the battery cell by adhesive bonding facilitates the assembly and connection of the sampling bracket on the battery cell.
[0017] In one embodiment, the sampling bracket has a through hole;
[0018] The temperature sensor has a temperature measuring part that can pass through the through hole and contact the cylindrical surface of the battery cell, so that the temperature sensor is electrically connected to the battery cell.
[0019] In one embodiment, the battery cell assembly further includes thermally conductive adhesive disposed at the location of the through hole for fixing the temperature sensing part.
[0020] It is understandable that the temperature sensing part is connected to the battery cell through the through hole, and there is a gap at the contact position between the temperature sensing part and the battery cell. By applying thermally conductive adhesive at the gap, the position of the temperature sensing part can be stabilized, and the heat transfer effect from the battery cell to the temperature sensing part can be enhanced, thereby ensuring the accuracy and reliability of the temperature sensor in temperature detection.
[0021] In one embodiment, the sampling bracket further includes a protective cover that covers the temperature measuring unit.
[0022] It is understandable that covering the temperature sensing part of the temperature sensor with the protective cover on the sampling bracket can protect the temperature sensing part from external damage and also prevent dust accumulation, thus preventing inaccurate measurements and extending the service life of the temperature sensor.
[0023] In one embodiment, the temperature sensor is configured as a thermocouple or a resistance temperature detector (RTD).
[0024] In one embodiment, the thermally conductive adhesive is configured as any one of silicone thermally conductive adhesive, epoxy thermally conductive adhesive, or polyurethane thermally conductive adhesive.
[0025] This application also provides the following technical solutions:
[0026] A battery pack comprising a cell assembly as described in any of the above embodiments.
[0027] Compared with the prior art, in this application, the temperature sensor is fixed to the battery cell by a sampling bracket. The sampling bracket is used to attach and connect the temperature sensor and the battery cell through surface-to-surface contact. This can improve the stability of the temperature sensor when it is fixed to the battery cell by the sampling bracket and avoid the problem of the temperature sensor shifting or falling off the battery cell. On the other hand, it can also ensure the contact area between the temperature sensor and the battery cell, which is beneficial to improving the accuracy and reliability of temperature detection. Attached Figure Description
[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0029] Figure 1 This is a schematic diagram of the battery cell assembly provided in this application from one perspective.
[0030] Figure 2 For this application Figure 1 Enlarged view of point A in the middle.
[0031] Figure 3 This is a schematic diagram of the battery cell assembly provided in this application from another perspective.
[0032] Figure 4 For this application Figure 3 Enlarged view of point B in the middle.
[0033] The component labels are as follows:
[0034] 100. Battery cell assembly; 10. Battery cell; 11. Cylindrical surface; 20. Temperature sensor; 21. Mounting plane; 22. Temperature measuring part; 30. Sampling bracket; 31. Support plate; 32. Card plate; 33. Card slot; 34. Connecting curved plate; 35. Through hole; 36. Protective cover; 37. Chamber; 40. Thermal conductive adhesive. Detailed Implementation
[0035] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application 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 application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0036] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.
[0037] Furthermore, 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0038] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is 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 can mean that the first feature is 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.
[0039] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.
[0040] like Figures 1 to 4 As shown, this application provides a battery cell assembly 100, which includes a battery cell 10, a temperature sensor 20, and a sampling bracket 30. The battery cell 10 has a cylindrical surface 11; the temperature sensor 20 is electrically connected to the battery cell 10 and is used to detect the temperature of the battery cell 10, and the temperature sensor 20 has a mounting surface 21; the sampling bracket 30 is attached to the cylindrical surface 11 in a surface contact manner and connected to the battery cell 10, and the sampling bracket 30 includes a support plate 31, and the sampling bracket 30 can be attached to the mounting surface 21 and connected to the temperature sensor 20 through the support plate 31.
[0041] As can be seen from the above, the temperature sensor 20 is fixed to the battery cell 10 by the sampling bracket 30. The sampling bracket 30 is attached and connected to the temperature sensor 20 and the battery cell 10 through surface-to-surface contact. This can improve the stability of the temperature sensor 20 when it is fixed to the battery cell 10 by the sampling bracket 30, and avoid the problem of the temperature sensor 20 shifting or falling off the battery cell 10. On the other hand, it can also ensure the contact area between the temperature sensor 20 and the battery cell 10, which is beneficial to improving the accuracy and reliability of temperature detection.
[0042] In one embodiment, the temperature sensor 20 is configured as a thermocouple or a resistance temperature detector (RTD). When the temperature of the battery cell 10 changes, if the temperature sensor 20 is configured as a thermocouple, a thermoelectric potential will be generated in the circuit; if the temperature sensor 20 is configured as an RTD, a resistance temperature detector (RTD) will be generated in the circuit. Finally, the corresponding temperature can be calculated. This measurement method is common in the prior art and will not be described in detail here.
[0043] In this embodiment, the support plate 31 of the sampling bracket 30 is flat, and the plane of the support plate 31 is attached and fixed to the mounting plane 21 of the temperature sensor 20. By attaching the two planes, the temperature sensor 20 has a larger contact area when it contacts the support plate 31. The larger contact area generates greater friction when fixing the temperature sensor 20, which can effectively prevent it from rotating or shifting. Therefore, the temperature sensor 20 can be better fixed to the sampling bracket 30, thereby making the temperature sensor 20 fit more closely to the cylindrical surface 11 of the battery cell 10.
[0044] like Figure 2As shown, the sampling bracket 30 also includes a retaining plate 32, which is disposed at the location of the support plate 31. A retaining groove 33 is formed between the retaining plate 32 and the support plate 31. The temperature sensor 20 can engage with the retaining groove 33 to fix the temperature sensor 20 onto the sampling bracket 30. By setting the retaining plate 32 on the support plate 31 and forming the retaining groove 33 with it, the temperature sensor 20 is assembled onto the sampling bracket 30 through the engagement of the temperature sensor 20 with the retaining groove 33, making assembly more convenient.
[0045] In one embodiment, the sampling bracket 30 has a connecting curved plate 34, and the sampling bracket 30 can be attached to the cylindrical surface 11 via the connecting curved plate 34 and connected to the cylindrical surface 11 by adhesive bonding. Thus, fixing the sampling bracket 30 to the battery cell 10 by adhesive bonding facilitates the assembly and connection of the sampling bracket 30 on the battery cell 10. Here, the connecting curved plate 34 of the sampling bracket 30 is attached to and mates with the cylindrical surface 11 of the battery cell 10. Therefore, the connecting curved plate 34 is configured as an arc surface matching the cylindrical surface 11 on the battery cell 10, and the diameter of this arc is larger than the diameter of the cylindrical surface 11 of the battery cell 10.
[0046] In this embodiment, one end of the connecting curved plate 34 is connected to the support plate 31, and the connecting curved plate 34 and the support plate 31 are integrally formed.
[0047] Furthermore, the sampling bracket 30 has a through hole 35; wherein, the temperature sensor 20 has a temperature measuring part 22, which can pass through the through hole 35 and contact the cylindrical surface 11 of the battery cell 10, so that the temperature sensor 20 is electrically connected to the battery cell 10. Here, the through hole 35 is located near the support plate 31 on the sampling bracket 30, and the size of the through hole 35 should be larger than the size of the temperature measuring part 22 of the temperature sensor 20.
[0048] In one embodiment, the sampling bracket 30 further includes a protective cover 36, which covers the temperature measuring unit 22. It is understood that by providing the protective cover 36, the temperature measuring unit 22 is protected from external damage, and it also serves as a dustproof cover, preventing dust from accumulating on the temperature sensor 20 and causing inaccurate measurements, thereby extending the service life of the temperature sensor 20.
[0049] In this embodiment, the protective cover 36, together with the connecting curved plate 34 and the support plate 31, forms a cavity 37 for accommodating the temperature measuring part 22 of the temperature sensor 20.
[0050] like Figure 2 and Figure 4As shown, the battery cell assembly 100 also includes thermally conductive adhesive 40, which is disposed at the location of the through hole 35 to fix the temperature sensing part 22. Applying thermally conductive adhesive 40 to the notch formed between the temperature sensing part 22 and the cylindrical surface 11 further fixes the temperature sensor 20, ensuring the stability of the temperature sensing part 22, and also enhances the heat transfer effect from the battery cell 10 to the temperature sensing part 22, thereby ensuring the accuracy and reliability of temperature detection by the temperature sensor 20.
[0051] Here, the thermally conductive adhesive 40 is configured as any one of silicone thermally conductive adhesive, epoxy thermally conductive adhesive, or polyurethane thermally conductive adhesive.
[0052] This application also provides a battery pack, including the cell assembly 100 as described in any of the above embodiments.
[0053] 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.
[0054] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.
Claims
1. A battery cell assembly, characterized in that, The battery cell assembly includes: The battery cell (10) has a cylindrical surface (11); A temperature sensor (20) is electrically connected to the battery cell (10) for detecting the temperature of the battery cell (10), and the temperature sensor (20) has a mounting surface (21); The sampling bracket (30) is attached to the cylindrical surface (11) in a surface contact manner and connected to the battery cell (10). The sampling bracket (30) includes a support plate (31). The sampling bracket (30) can be attached to the mounting plane (21) through the support plate (31) and connected to the temperature sensor (20).
2. The battery cell assembly according to claim 1, characterized in that, The sampling bracket (30) also includes a card plate (32), which is disposed at the location of the support plate (31), and a card groove (33) can be formed between the card plate (32) and the support plate (31); The temperature sensor (20) can be engaged with the slot (33) to fix the temperature sensor (20) onto the sampling bracket (30).
3. The battery cell assembly according to claim 1, characterized in that, The support plate (31) is flat.
4. The cell assembly according to claim 1, characterized in that, The sampling bracket (30) has a connecting curved plate (34), and the sampling bracket (30) can be attached to the cylindrical surface (11) through the connecting curved plate (34) and connected to the cylindrical surface (11) by adhesive bonding.
5. The cell assembly according to claim 1, characterized in that, The sampling bracket (30) has a through hole (35); The temperature sensor (20) has a temperature measuring part (22), which can pass through the through hole (35) and contact the cylindrical surface (11) of the battery cell (10) so that the temperature sensor (20) is electrically connected to the battery cell (10).
6. The cell assembly according to claim 5, characterized in that, The battery cell assembly also includes thermally conductive adhesive (40), which is disposed at the location of the through hole (35) and is used to fix the temperature measuring part (22).
7. The cell assembly according to claim 5, characterized in that, The sampling bracket (30) also includes a protective cover (36), which covers the temperature measuring part (22).
8. The cell assembly according to claim 1, characterized in that, The temperature sensor (20) is configured as a thermocouple or a resistance temperature detector (RTD).
9. The cell assembly according to claim 6, characterized in that, The thermally conductive adhesive (40) is configured as any one of silicone thermally conductive adhesive, epoxy thermally conductive adhesive, or polyurethane thermally conductive adhesive.
10. A battery pack, characterized in that, Includes the cell assembly as described in any one of claims 1-9.