Battery top cover and battery

Abstract

The utility model relates to the technical field of batteries, and discloses a battery top cover and a battery, the battery top cover comprises a sensor mounting seat, a top cover plate and a sealing element, a through hole penetrating through the top cover plate is arranged on the top cover plate along the thickness direction of the top cover plate, a groove surrounding the through hole is arranged on the upper surface of the top cover plate and / or the bottom surface of the sensor mounting seat, and the sealing element is arranged in the groove. The sealing element is embedded in the groove; and the sensor mounting seat is mounted on the through hole and the sealing element in a covering manner and is in sealing connection with the top cover plate. According to the battery top cover provided by the utility model, the groove is formed in the upper surface of the top cover plate and / or the bottom surface of the sensor mounting seat, so that the sealing element is embedded and mounted in the groove and is not in direct contact with the outside, and the conditions of aging, damage and the like caused by exposure to the outside are avoided; the reliability of sealing connection between the sensor mounting seat and the battery top cover is ensured, and the accuracy and the stability of data acquisition in the battery are improved.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, specifically relating to a battery top cover and a battery. Background Technology

[0002] In recent years, the lithium-ion battery energy storage market has experienced a period of rapid development, with its scale showing a swift growth trend. This is mainly attributed to the significant advantages of lithium-ion batteries over traditional energy storage technologies in terms of energy density, charge / discharge efficiency, and cycle life. However, with the rapid expansion of the market, the safety issues of lithium-ion batteries have gradually become a bottleneck for the industry's development.

[0003] Existing Battery Management System (BMS) technology has revealed its limitations in accurately identifying and warning of battery safety hazards when faced with increasingly complex battery application scenarios and ever-improving safety standards. BMS primarily monitors basic parameters such as battery voltage, current, and temperature to maintain normal battery operation and ensure its safety. However, for some potential and more subtle safety hazards, such as internal micro-short circuits and thermal runaway, traditional BMS technology struggles to detect and warn of them in a timely and accurate manner. Therefore, there is an urgent need to introduce new technologies to assist BMS and improve its monitoring and warning capabilities for battery safety status. Consequently, sensor monitoring systems based on individual battery cells have emerged.

[0004] In existing battery cell sensing and monitoring technologies, firstly, many sensors are installed inside the battery. Due to the large size of the sensors themselves and the complexity of their installation structure, they occupy too much space inside the battery. This not only affects the layout and design freedom of other components inside the battery, but may also adversely affect the battery's capacity due to space occupation, thereby affecting the overall performance and lifespan of the battery.

[0005] Secondly, some sensors are directly glued to the battery cover using mounting bases. While this method provides some connection strength during initial installation, the glue gradually ages and fails due to heat generated during battery charging and discharging, battery vibration, and environmental factors. This leads to loosening of the connection between the sensor mounting base and the battery cover, affecting the accuracy and stability of the sensor's data acquisition.

[0006] Additionally, some sensor mounting bases use a sealing ring around the air inlet at the bottom to secure it to the battery top cover for a seal. However, this sealing ring is also affected by the battery's operating environment. Over long-term use, factors such as battery heating during charging and discharging, battery vibration, and material aging can gradually reduce its sealing performance, eventually leading to an unreliable seal between the sensor mounting base and the battery. If this occurs, the data collected by the sensor will not accurately reflect the actual internal state of the battery, potentially causing the BMS to make incorrect judgments and decisions, and in severe cases, even leading to battery safety incidents. Utility Model Content

[0007] This invention addresses the problems in the prior art where the sensor mounting base is sealed to the battery top cover via a sealing ring fixed to the surface of the battery top cover. These problems include the sealing ring's aging and damage during long-term use, leading to decreased sealing performance and ultimately unreliable sealing between the sensor mounting base and the battery. The invention provides a battery top cover and a battery.

[0008] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0009] According to one objective of this utility model, a battery top cover is provided, comprising: a sensor mounting base, a top cover plate, and a sealing element. A through hole is provided on the top cover plate along the thickness direction of the top cover plate. A groove is provided around the through hole on the upper surface of the top cover plate and / or the bottom surface of the sensor mounting base. The sealing element is embedded in the groove. The sensor mounting base covers and is installed on the through hole and the sealing element and is sealed to the top cover plate. A sensor mounting cavity is provided inside the sensor mounting base. An air inlet is provided at the bottom of the sensor mounting base. The sensor mounting cavity communicates with the through hole through the air inlet.

[0010] In some alternative implementations, the sensor mounting base includes a mounting base plate disposed around the bottom of the sensor mounting base, the mounting base plate being sealed to the top cover plate.

[0011] In some alternative implementations, the mounting base plate is embedded in the groove and abuts against the seal, and the side of the mounting base plate is welded to the side of the groove.

[0012] In some alternative implementations, the top surface of the mounting base plate and the upper surface of the top cover plate are located on the same plane.

[0013] In some alternative implementations, the mounting base plate covers the upper surface of the top cover plate and is welded and fixed to the top cover plate.

[0014] In some alternative implementations, the bottom surface of the sensor mounting base is provided with a mounting protrusion, which is embedded in the groove and abuts against the seal.

[0015] In some alternative implementations, the sensor mounting base further includes a mounting post disposed on the bottom surface of the sensor mounting base, the air inlet communicating with the bottom surface of the mounting post, and the mounting post passing through the seal and embedded in the through hole.

[0016] In some alternative implementations, the lower surface of the top cover plate is provided with a boss surrounding the through hole, the through hole communicating with the lower surface of the boss.

[0017] In some alternative implementations, the bottom surface of the mounting post does not extend beyond the lower surface of the boss.

[0018] In some alternative implementations, the outer diameter of the seal is smaller than the diameter of the groove.

[0019] In some alternative implementations, the battery top cover further includes an insulating element disposed below the top cover plate, and the insulating element has a vent hole communicating with the through hole.

[0020] In some alternative implementations, the through hole is a liquid injection hole.

[0021] According to another objective of this utility model, a battery is provided, including a battery casing and a battery top cover as described in any of the above claims, wherein the battery casing has an electrode assembly inside, the battery casing has an opening, and the battery top cover seals the opening.

[0022] Compared with the prior art, the beneficial effects of this utility model's technical solution are:

[0023] The battery top cover provided by this utility model has a groove around the through hole on the upper surface of the top cover plate and / or the bottom surface of the sensor mounting base, so that the sealing element is embedded in the groove and does not directly contact the outside. This avoids the sealing element being exposed to the outside and aging or being damaged, ensuring the reliability of the sealing connection between the sensor mounting base and the top cover plate, improving the accuracy and stability of data acquisition inside the battery, and further improving the BMS's ability to monitor and warn of battery safety status.

[0024] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical solution of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, specific embodiments of this utility model are given below. Attached Figure Description

[0025] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0026] Figure 1 An exploded view of a battery top cover from a first perspective, provided in Embodiment 1 of this utility model;

[0027] Figure 2 An exploded view of a battery top cover from a second perspective, provided in Embodiment 1 of this utility model;

[0028] Figure 3 A schematic diagram of the structure of a sensor mounting base for a battery top cover provided in Embodiment 1 of this utility model from a first perspective;

[0029] Figure 4 A schematic diagram of the structure of a sensor mounting base for a battery top cover provided in Embodiment 1 of this utility model from a second perspective;

[0030] Figure 5 This is a schematic diagram of the structure of the top cover plate of a battery top cover provided in Embodiment 1 of this utility model;

[0031] Figure 6 for Figure 5 Sectional view of plane AA;

[0032] Figure 7 for Figure 6 Enlarged schematic diagram of part A;

[0033] Figure 8 This is a schematic diagram of the structure of a battery top cover provided in Embodiment 1 of this utility model;

[0034] Figure 9 for Figure 8 Sectional view of plane AA;

[0035] Figure 10 for Figure 9 Enlarged schematic diagram of part B;

[0036] Figure 11 An exploded view of a battery top cover from a first perspective, provided in Embodiment 2 of this utility model;

[0037] Figure 12 An exploded view of a battery top cover from a second perspective, provided in Embodiment 2 of this utility model;

[0038] Figure 13 A schematic diagram of the structure of a sensor mounting base for a battery top cover provided in Embodiment 2 of this utility model from a first perspective;

[0039] Figure 14 A schematic diagram of the structure of a sensor mounting base for a battery top cover provided in Embodiment 2 of this utility model from a second perspective;

[0040] Figure 15 This is a schematic diagram of the structure of a battery top cover provided in Embodiment 2 of this utility model;

[0041] Figure 16 for Figure 15 Sectional view of plane AA;

[0042] Figure 17 for Figure 16 Enlarged schematic diagram of part C.

[0043] in,

[0044] 10. Sensor mounting bracket;

[0045] 11. Install base plate; 12. Install protrusion; 13. Install column; 14. Sensor mounting cavity; 15. Air inlet;

[0046] 20. Top cover plate;

[0047] 21. Through hole; 22. Groove; 23. Boss;

[0048] 30. Sealing components;

[0049] 40. Insulating parts; 41. Vent holes.

[0050] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The same or similar reference numerals correspond to the same or similar components. The terms describing positional relationships in the drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. Detailed Implementation

[0051] It should be noted that, in the absence of conflict, the embodiments and technical features in the embodiments of this utility model can be combined with each other. The detailed description in the specific embodiments should be understood as an explanation of the spirit of this utility model and should not be regarded as an improper limitation of this utility model.

[0052] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the specific technical solutions of this utility model will be further described in detail below with reference to the accompanying drawings of the embodiments of this utility model. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0053] In the embodiments of this utility model, 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 indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0054] Furthermore, in this embodiment of the utility model, directional terms such as "left" and "right" are defined relative to the orientation of the components shown in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the orientation of the components in the accompanying drawings.

[0055] In the embodiments of this utility model, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium.

[0056] In embodiments of this invention, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion. Without further limitation, 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 that element.

[0057] In this embodiment of the invention, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" or "for example" in this embodiment of the invention should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0058] Example 1

[0059] This utility model embodiment overcomes the problems in the prior art where the sensor mounting base is sealed to the battery top cover by a sealing ring fixed to the surface of the battery top cover. During long-term use, the sealing ring is prone to aging and damage, and the sealing performance deteriorates, leading to unreliable sealing between the sensor mounting base and the battery. This embodiment provides a battery top cover.

[0060] This utility model provides a battery top cover, such as Figures 1-2As shown, it includes: a sensor mounting base 10, a top cover plate 20, and a sealing element 30. A through hole 21 is provided on the top cover plate 20 along the thickness direction of the top cover plate 20. A groove 22 is provided on the upper surface of the top cover plate 20 around the through hole 21. The sealing element 30 is embedded in the groove 22. The sensor mounting base 10 covers and is installed on the through hole 21 and the sealing element 30 and is sealed to the top cover plate 20. The sensor mounting base 10 has a sensor mounting cavity 14 inside. An air inlet 15 is provided at the bottom of the sensor mounting base 10. The sensor mounting cavity 14 is connected to the through hole 21 through the air inlet 15.

[0061] In this embodiment, the sensor is placed in the sensor mounting cavity 14 of the sensor mounting base 10, and the sealing element 30 is embedded in the groove 22. When the sensor mounting base 10 is pressed down to assemble with the top cover plate 20, the sealing element 30 is compressed at the same time, so that the sensor mounting base 10 is sealed to the top cover plate 20 through the sealing element 30.

[0062] The seal 30 is embedded in the groove 22 and does not come into contact with the outside, thus preventing the seal 30 from being exposed to the outside and aging or being damaged during long-term use. At the same time, it also achieves long-term sealing between the sensor mounting base 10 and the top cover plate 20, ensuring the reliability of the sealing connection between the sensor mounting base 10 and the top cover plate 20, improving the accuracy and stability of data acquisition inside the battery, and further enhancing the BMS's ability to monitor and warn of battery safety status.

[0063] In this embodiment, since the through hole 21 extends through the top cover plate 20 along the thickness direction, and the sensor is placed in the sensor mounting cavity 14 of the sensor mounting base 10, and the sensor mounting cavity 14 is connected to the through hole 21 through the air inlet 15, the sensor can monitor the basic parameters such as the pressure and temperature inside the battery through the through hole 21, thereby realizing the monitoring and early warning capability of the battery safety status.

[0064] In this embodiment, the sensor, in conjunction with the BMS, monitors the internal temperature of the battery as follows: During operation, the battery temperature may rise due to internal electrochemical reactions and external environmental factors. When the sensor detects that the battery temperature exceeds the upper limit of the safe temperature range, this may be caused by overcharging, over-discharging, short circuits, or poor heat dissipation. Upon receiving a high-temperature signal, the BMS can take measures such as reducing the charging and discharging current, activating the cooling system, or issuing an alarm to prevent battery thermal runaway.

[0065] In this embodiment, the sensor, in conjunction with the BMS, monitors the internal pressure of the battery as follows: Gas buildup inside the battery causes an increase in internal pressure. Therefore, the sensor can monitor these pressure changes in real time. When the pressure exceeds a safety threshold, this may be a signal of a serious battery problem, such as the early stages of thermal runaway. Upon receiving the abnormal pressure signal, the BMS can take timely measures, such as releasing the internal pressure or immediately stopping the battery's operation, to prevent safety accidents such as battery casing rupture.

[0066] In summary, by providing a groove 22 around the through hole 21 on the upper surface of the top cover plate 20, the sealing element 30 is embedded in the groove 22, thus preventing it from contacting the outside world and avoiding the sealing element 30 being exposed to the outside, which would cause it to age and be damaged during long-term use. At the same time, it also achieves long-term sealing between the sensor mounting base 10 and the top cover plate 20, ensuring the reliability of the sealed connection between the sensor mounting base 10 and the top cover plate 20, improving the accuracy and stability of the sensor's acquisition of data inside the battery, and further improving the BMS's ability to monitor and warn of the battery's safety status.

[0067] In this preferred embodiment, the sealing element 30 is a sealing ring. The outer diameter of the sealing element 30 is set to be smaller than the diameter of the groove 22, so that the groove 22 can provide a certain deformation space for the sealing element 30 when it is under pressure, thereby alleviating the stress generated between the sensor mounting base 10 and the top cover plate 20 during the compression process and avoiding excessive local compression. In addition, when the battery charging voltage is too high or the ambient temperature is too high, the amount of gas generated inside the battery will increase. When the gas increases to a certain level, the top cover plate 20 will expand under pressure, generating a certain stress on the surrounding structure. The sealing element 30, which has a certain degree of elasticity, can adapt to this change through its own deformation, always tightly fitting between the top cover plate 20 and the sensor mounting base 10 to prevent air leakage, thereby reducing the risk of inaccurate data due to air leakage during the sensor's battery monitoring process.

[0068] In this preferred embodiment, the through hole 21 extends through the top cover plate 20 along its thickness direction. The sensor is placed in the sensor mounting cavity 14 of the sensor mounting base 10, which is connected to the through hole 21 via the air inlet 15. The sealing element 30 is embedded in the groove 22. When the sensor mounting base 10 is pressed down to assemble with the top cover plate 20, the sealing element 30 is compressed simultaneously, so that the sensor mounting base 10 is sealed to the top cover plate 20 through the sealing element 30. Then, the contact point between the sensor mounting base 10 and the top cover plate 20 is welded to seal the connection, which further improves the reliability of the sealed connection between the sensor mounting base 10 and the top cover plate 20, thereby reducing the risk of inaccurate data due to air leakage during battery monitoring.

[0069] Therefore, the specific structure of the sensor mounting base 10 has been optimized.

[0070] In this embodiment, as Figures 3-4 As shown, the sensor mounting base 10 includes a mounting base plate 11, which is disposed around the bottom of the sensor mounting base 10 and is sealed to the top cover plate 20.

[0071] Preferably, the shape of the mounting base plate 11 matches the shape of the groove 22, the mounting base plate 11 is embedded in the groove 22 and abuts against the sealing element 30, and the side of the mounting base plate 11 is welded and fixed to the side of the groove 22, thereby achieving a welded seal between the mounting base plate 11 and the top cover plate 20.

[0072] In addition, in this embodiment, the top surface of the mounting base plate 11 and the upper surface of the top cover plate 20 are located on the same plane, ensuring the flatness of the battery top cover surface.

[0073] In this embodiment, the size of the sensor mounting base 10 is matched with the size of the built-in sensor. When the sensor is small, a smaller sensor mounting base 10 is used, that is, the mounting base plate 11 of the sensor mounting base 10 is also small. The shape of the mounting base plate 11 of the sensor mounting base 10 matches the shape of the groove 22. The mounting base plate 11 can be completely embedded in the groove 22 and abut against the sealing member 30. The side of the mounting base plate 11 is welded and fixed to the side of the groove 22 of the top cover plate 20.

[0074] In addition, in this embodiment, the thickness of the seal 30 is related to the depth of the groove 22 and the thickness of the mounting base plate 11, and it can be adjusted according to the depth of the groove 22 and the thickness of the mounting base plate 11.

[0075] In this embodiment, the sensor mounting base 10 further includes a mounting post 13, which is disposed on the bottom surface of the sensor mounting base 10. The air inlet 15 is connected to the bottom surface of the mounting post 13, and the mounting post 13 passes through the seal 30 and is embedded in the through hole 21.

[0076] Specifically, the mounting post 13 is set on the bottom surface of the sensor mounting base 10 and is integrally formed with the sensor mounting base 10.

[0077] Preferably, this embodiment also optimizes the structure of the through hole 21 of the top cover plate 20 that mates with the sensor mounting base 10.

[0078] Specifically, since the top cover plate 20 has a groove 22 on its upper surface, which reduces the thickness of the top cover plate 20, a boss 23 is provided on the lower surface of the top cover plate 20 to increase the thickness of the top cover plate 20 and thus increase the strength of the top cover plate 20.

[0079] Therefore, as Figures 5-7 As shown, a boss 23 is provided on the lower surface of the top cover plate 20 around the through hole 21, and the through hole 21 connects to the lower surface of the boss 23. After the mounting post 13 passes through the seal 30 and is embedded in the through hole 21, the bottom surface of the mounting post 13 does not exceed the lower surface of the boss 23, so as to ensure the reliability of the connection between the sensor mounting base 10 and the top cover plate 20, and to avoid the sensor mounting base 10 occupying the internal space of the battery.

[0080] In this embodiment, as Figures 8-10 As shown, when the sensor mounting base 10 is assembled, the mounting post 13 passes through the seal 30 and enters the through hole 21, and the bottom surface of the mounting post 13 does not exceed the lower surface of the boss 23. The mounting base plate 11 is embedded in the groove 22 and compresses the seal 30 to achieve a seal with the top cover plate 20. At the same time, the side of the mounting base plate 11 is welded and fixed to the side of the groove 22.

[0081] In this preferred embodiment, a cross-section is made along the axial direction of the through hole 21, and the cross-sectional shape of the groove 22 is conical, which facilitates the assembly of the mounting base plate 11 and also ensures the reliability and stability of the connection between the mounting base plate 11 and the top cover plate 20.

[0082] In some alternative embodiments, such as Figure 2 As shown, the battery top cover also includes an insulating component 40, which is disposed below the top cover plate 20, and the insulating component 40 is provided with a vent hole 41 communicating with the through hole 21.

[0083] Therefore, after the battery top cover of this embodiment is assembled, the gas generated during the operation of the battery can pass through the vent hole 41 on the insulating component 40, smoothly through the through hole 21 of the top cover plate 20, and finally through the air inlet hole 15 on the sensor mounting base 10 into the sensor mounting cavity 14, so that the sensor installed in the sensor mounting cavity 14 can realize real-time monitoring of the internal state of the battery.

[0084] Example 2

[0085] This utility model embodiment provides a battery top cover, which optimizes the structure of the sensor mounting base 10 based on embodiment 1.

[0086] The battery top cover provided in this embodiment, such as Figures 11-12As shown, it includes: a sensor mounting base 10, a top cover plate 20, and a sealing element 30. A through hole 21 is provided on the top cover plate 20 along the thickness direction of the top cover plate 20. A groove 22 is provided on the upper surface of the top cover plate 20 around the through hole 21. The sealing element 30 is embedded in the groove 22. The sensor mounting base 10 covers and is installed on the through hole 21 and the sealing element 30 and is sealed to the top cover plate 20. The sensor mounting base 10 has a sensor mounting cavity 14 inside. An air inlet 15 is provided at the bottom of the sensor mounting base 10. The sensor mounting cavity 14 is connected to the through hole 21 through the air inlet 15.

[0087] Given that this embodiment optimizes the structure of the sensor mounting base 10 based on embodiment 1, so that the size of the sensor mounting base 10 can be adapted to a larger sensor, the sensor mounting cavity 14 inside the sensor mounting base 10 is increased, and the contact area between the sensor mounting base 10 and the top cover plate 20 is also increased.

[0088] Therefore, the sensor mounting base 10 in this embodiment, as... Figures 13-14 As shown, it includes a mounting base plate 11, which is also relatively large in volume. The mounting base plate 11 covers the upper surface of the top cover plate 20 and is welded and fixed to the top cover plate 20.

[0089] In addition, a mounting protrusion 12 is provided on the bottom surface of the sensor mounting base 10. The mounting protrusion 12 is embedded in the groove 22 and abuts against the seal 30.

[0090] Preferably, the shape of the mounting protrusion 12 matches the shape of the groove 22, the mounting protrusion 12 is embedded in the groove 22 and abuts against the seal 30, and the mounting base plate 11 is welded and fixed at the contact point with the top cover plate 20.

[0091] That is, the shape of the mounting protrusion 12 of the sensor mounting base 10 matches the shape of the groove 22, and the mounting protrusion 12 can be completely embedded in the groove 22 and abut against the seal 30; the mounting base plate 11 and the top cover plate 20 are welded and fixed at the contact point, thereby realizing the welded seal between the sensor mounting base 10 and the top cover plate 20, and improving the reliability of the sealed connection between the sensor mounting base 10 and the top cover plate 20.

[0092] In addition, in this embodiment, the sensor mounting base 10 also includes a mounting post 13, which is disposed on the bottom surface of the sensor mounting base 10. The air inlet 15 is connected to the bottom surface of the mounting post 13, and the mounting post 13 passes through the seal 30 and is embedded in the through hole 21.

[0093] Specifically, the mounting post 13 is located on the bottom surface of the mounting protrusion 12 and is integrally formed with the sensor mounting base 10.

[0094] In addition, in this embodiment, the thickness of the seal 30 is related to the depth of the groove 22 and the thickness of the mounting protrusion 12, and can be adjusted according to the depth of the groove 22 and the thickness of the mounting protrusion 12.

[0095] Therefore, the battery top cover in this embodiment, as... Figures 15-17 As shown, during the assembly of the sensor mounting base 10, the mounting post 13 passes through the seal 30 and enters the through hole 21, and the bottom surface of the mounting post 13 does not exceed the lower surface of the boss 23. The mounting protrusion 12 is embedded in the groove 22 and compresses the seal 30 to achieve a seal with the top cover plate 20. At the same time, the mounting base plate 11 is welded and fixed at the contact point with the top cover plate 20, ensuring the reliability and stability of the sealed connection between the sensor mounting base 10 and the top cover plate 20.

[0096] Example 3

[0097] This utility model embodiment provides a battery top cover, which optimizes the setting position of the groove 22 based on the above embodiment.

[0098] In this embodiment, the groove 22 is provided on the bottom surface of the sensor mounting base 10 and surrounds the through hole 21 on the top cover plate 20.

[0099] Specifically, the groove 22 is provided on the bottom surface of the sensor mounting base 10, and the seal 30 is embedded in the groove 22. The sensor mounting base 10 is sealed to the top cover plate 20 through the seal 30.

[0100] When the sensor mounting base 10 is pressed down to assemble with the top cover plate 20, the sealing element 30 is compressed at the same time, so that the sensor mounting base 10 is sealed to the top cover plate 20 through the sealing element 30. Then, the contact point between the mounting base plate 11 and the top cover plate 20 is welded and sealed, which further improves the reliability of the sealed connection between the sensor mounting base 10 and the top cover plate 20, thereby reducing the risk of inaccurate data due to air leakage during battery monitoring.

[0101] Example 4

[0102] This utility model embodiment provides a battery top cover, which optimizes the setting position of the through hole 21 on the top cover plate 20 based on the above embodiment.

[0103] In this embodiment, the through hole 21 can be the original liquid injection hole on the top cover plate 20, and the liquid injection hole can be sealed by the sensor mounting base 10 and the sealing element 30 instead of the sealing glue nail and sealing aluminum nail.

[0104] In some optional embodiments, the through hole 21 may be a hole separately opened on the top cover plate 20, and its assembly structure with the sensor mounting base 10 is described in Embodiment 1 or Embodiment 2 above. This embodiment will not elaborate on it further.

[0105] Example 5

[0106] This embodiment discloses a battery, which includes a battery casing and a battery top cover as described in any of the embodiments 1-4 above. The battery casing has an electrode assembly inside and an opening, which is sealed by the battery top cover. Because this battery is made using the battery top cover described in any of the embodiments 1-4 above, the accuracy and stability of data acquisition within the battery are improved, further enhancing the BMS's ability to monitor and warn of battery safety status.

[0107] The sequence numbers of the above-described embodiments are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above are merely preferred embodiments of the present invention, provided only to clearly illustrate the present invention, and are not intended to limit the patent scope of the present invention. For those skilled in the art, other variations or modifications can be made based on the above description; it is neither necessary nor possible to exhaustively describe all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the claims of the present invention.

Claims

1. A battery top cover, characterized in that, include: The sensor mounting base (10), top cover plate (20), and sealing element (30) are provided. A through hole (21) is provided on the top cover plate (20) along the thickness direction of the top cover plate (20). A groove (22) is provided around the through hole (21) on the upper surface of the top cover plate (20) and / or the bottom surface of the sensor mounting base (10). The sealing element (30) is embedded in the groove (22). The sensor mounting base (10) is covered and installed on the through hole (21) and the sealing element (30) and is sealed and connected to the top cover plate (20). A sensor mounting cavity (14) is provided inside the sensor mounting base (10). An air inlet (15) is provided at the bottom of the sensor mounting base (10). The sensor mounting cavity (14) is connected to the through hole (21) through the air inlet (15).

2. The battery top cover according to claim 1, characterized in that, The sensor mounting base (10) includes a mounting base plate (11) which is disposed around the bottom of the sensor mounting base (10) and is sealed to the top cover plate (20).

3. A battery top cover according to claim 2, characterized in that, The mounting base plate (11) is embedded in the groove (22) and abuts against the seal (30), and the side of the mounting base plate (11) is welded and fixed to the side of the groove (22).

4. A battery top cover according to claim 3, characterized in that, The top surface of the mounting base plate (11) and the upper surface of the top cover plate (20) are on the same plane.

5. A battery top cover according to claim 2, characterized in that, The mounting base plate (11) covers the upper surface of the top cover plate (20) and is welded and fixed to the top cover plate (20).

6. A battery top cover according to claim 5, characterized in that, The bottom surface of the sensor mounting base (10) is provided with a mounting protrusion (12), which is embedded in the groove (22) and abuts against the seal (30).

7. A battery top cover according to claim 1, characterized in that, The sensor mounting base (10) further includes a mounting post (13), which is disposed on the bottom surface of the sensor mounting base (10). The air inlet (15) is connected to the bottom surface of the mounting post (13). The mounting post (13) passes through the seal (30) and is embedded in the through hole (21).

8. A battery top cover according to claim 7, characterized in that, The lower surface of the top cover plate (20) is provided with a boss (23) surrounding the through hole (21), and the through hole (21) is connected to the lower surface of the boss (23).

9. A battery top cover according to claim 8, characterized in that, The bottom surface of the mounting post (13) does not exceed the lower surface of the boss (23).

10. A battery top cover according to claim 1, characterized in that, The outer diameter of the seal (30) is smaller than the diameter of the groove (22).

11. A battery, characterized in that, The battery includes a battery housing and a battery top cover as described in any one of claims 1-10, wherein the battery housing has an electrode assembly inside, the battery housing has an opening, and the battery top cover seals the opening.

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