Battery top cover and battery

Abstract

The utility model relates to the technical field of battery production, and discloses a battery top cover and a battery, and the battery top cover comprises a top cover body, a signal acquisition mechanism and a fixing sheet. A through hole is formed in the top cover body; the signal acquisition mechanism comprises a mechanism body, a mounting column, an induction piece and a communication connecting piece, the mounting column is arranged on the bottom surface of the mechanism body, an air inlet hole is formed in the mounting column, the induction piece is arranged in the mechanism body, the communication connecting piece is horizontally arranged on the side surface of the mechanism body, and the communication connecting piece is electrically connected with the induction piece; the mechanism body covers the through hole and abuts against the top cover body, the mounting column is embedded into the through hole, and the induction piece communicates with the through hole through the air inlet hole; the fixing piece comprises a fixing part and a connecting part, the fixing part presses the signal acquisition mechanism on the top cover body, and the connecting part is connected with the fixing part and the top cover body. According to the battery top cover disclosed by the utility model, the problem that the communication connecting piece is easily influenced by external force to be damaged is avoided.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing technology, and in particular to a battery top cover and a battery. Background Technology

[0002] Currently, with the continuous development of the energy storage industry, lithium-ion batteries have been widely used due to their high capacity and other excellent characteristics. A lithium-ion battery mainly consists of an aluminum casing and a top cover. The aluminum casing has an opening, and the top cover seals the opening in the aluminum casing, thus forming a closed energy storage system. Within this closed system are corresponding energy storage structures and materials.

[0003] In existing technologies, to actively monitor changes in internal air pressure and temperature of a battery, sensors are typically used to obtain information on these changes. Specifically, one approach is to place the sensor inside the battery, but this occupies internal space and affects battery capacity. Another approach is to place the sensor on the battery top cover and connect it via a vertically mounted connector to transmit signals. However, this vertical connector occupies space above the battery, affecting the assembly of the battery module and battery pack, and is also susceptible to damage from external forces. Utility Model Content

[0004] To address the shortcomings of the prior art, this utility model provides a battery top cover and a battery, avoiding the problem that communication connectors are easily damaged by external forces.

[0005] The technical effects to be achieved by this utility model are realized through the following aspects:

[0006] In a first aspect, this utility model provides a battery top cover, comprising:

[0007] The top cover body has a through hole;

[0008] A signal acquisition mechanism includes a mechanism body, a mounting column, a sensor, and a communication connector. The mounting column is disposed on the bottom surface of the mechanism body and has an air inlet. The sensor is disposed inside the mechanism body. The communication connector is horizontally disposed on the side of the mechanism body and is electrically connected to the sensor. The mechanism body is mounted on the through hole and abuts against the top cover body. The mounting column is embedded in the through hole. The sensor communicates with the through hole through the air inlet.

[0009] The fixing plate includes a fixing part and a connecting part. The fixing part presses the signal acquisition mechanism onto the top cover body, and the connecting part is connected to the fixing part and the top cover body respectively.

[0010] In some implementations, the fixing part includes a top fixing part and at least one side fixing part. The side fixing part is connected to the top fixing part and forms a receiving space. The connecting part is connected to the side fixing part and the top cover body respectively. The mechanism body is installed in the receiving space. The side of the fixing part corresponding to the communication connector is not provided with a side fixing part.

[0011] In some implementations, a cross-section is taken along the radial direction of the mechanism body, the shape of the mechanism body is polygonal, and the shape of the accommodating space is a polygon that matches the shape of the mechanism body.

[0012] In this implementation, the anti-torsional performance between the fixing plate and the mechanism body is improved, making the mechanism body more securely fixed to the top cover body.

[0013] In some implementations, there are at least two side fixing parts and at least two connecting parts, wherein the two side fixing parts are disposed opposite to each other on both sides of the top fixing part and are respectively connected to the connecting part.

[0014] In this implementation, the top fixing part abuts against the top of the body of the signal acquisition mechanism, and two oppositely arranged side fixing parts are connected to the opposite sides of the top fixing part to form a covering effect on the body of the mechanism. The two side fixing parts are respectively connected to the connecting part, thereby fixing the signal acquisition mechanism to the top cover body.

[0015] In some implementations, a top surface limiting groove is formed on the top surface of the mechanism body, and the top surface fixing part is embedded in the top surface limiting groove; and / or

[0016] The side of the mechanism body is provided with a side limiting groove, and the side fixing part is embedded in the side limiting groove.

[0017] This implementation improves the connection stability between the mechanism body and the fixed plate, preventing the mechanism body from moving and thus affecting the normal use of the signal acquisition mechanism.

[0018] In some implementations, the mechanism body includes a gas transmission unit and a signal acquisition unit. The signal acquisition unit is mounted on the gas transmission unit, the mounting post is disposed on the bottom surface of the gas transmission unit, the sensing element is disposed inside the signal acquisition unit, the communication connector is horizontally disposed on the side of the signal acquisition unit, and the gas transmission unit is covered and mounted on the through hole and abuts against the top cover body.

[0019] In this implementation, the gas transmission unit is mounted on the through hole and communicates with the through hole through the air inlet on the mounting post. The signal acquisition unit is mounted on the gas transmission unit, so that the gas inside the battery is conducted to the sensor inside the signal acquisition unit through the through hole and the air inlet, thereby enabling the sensor to acquire the gas pressure and temperature information inside the battery and feed this information back to the external signal receiver through the communication connector.

[0020] In some implementations, the top surface of the gas transmission unit is provided with a snap-fit ​​groove, and the bottom surface of the signal acquisition unit is provided with a snap-fit ​​part that engages with the snap-fit ​​groove.

[0021] In some implementations, sealant is injected between the fixing part and the gas transmission part and the signal acquisition part.

[0022] In some implementations, the battery top cover further includes an insulating member disposed below the top cover body, and the insulating member has a vent hole communicating with the through hole.

[0023] In some implementations, the battery top cover further includes a sealing element, and the upper surface of the top cover body and / or the bottom surface of the mechanism body are provided with a groove surrounding the through hole, and the sealing element is embedded in the groove.

[0024] In some implementations, the through hole is a liquid injection hole.

[0025] Secondly, this utility model provides a battery, comprising:

[0026] The housing includes a receiving cavity with an opening;

[0027] Electrode assemblies are installed within the accommodating cavity; and

[0028] The aforementioned battery top cover; the battery top cover closes to the opening.

[0029] In summary, this utility model has at least the following advantages:

[0030] The battery top cover provided by this utility model has a through hole in its main body. A mounting post is set on the bottom surface of the main body, and a sensor is set inside the main body. A communication connector is horizontally set on the side of the main body and electrically connected to the sensor. The mounting post is embedded in the through hole and has an air inlet. The sensor communicates with the through hole through the air inlet, enabling the sensor to sense the air pressure and temperature inside the battery and feed back the sensed air pressure and temperature information to an external signal receiver through the communication connector. Because the communication connector is horizontally set on the side of the main body, it avoids the problem of the communication connector being easily damaged by external forces, and also saves space and avoids affecting the assembly of the battery module and battery pack. A fixing plate presses and fixes the signal acquisition mechanism to the top cover body, making the overall structure more compact. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the battery top cover in Example 1;

[0032] Figure 2 for Figure 1 The image shows a magnified view of the battery cover at point A.

[0033] Figure 3 for Figure 2 The diagram shown is a structural schematic of the signal acquisition mechanism.

[0034] Figure 4 This is a schematic diagram of the signal acquisition mechanism in Example 2;

[0035] Figure 5 This is a schematic diagram of the insulating component in Example 2;

[0036] Figure 6 This is a schematic diagram of the battery structure in Example 3.

[0037] Marked in the image:

[0038] 1. Battery top cover;

[0039] 10. Top cover body; 101. Groove; 11. Through hole;

[0040] 20. Signal acquisition mechanism; 21. Mechanism body; 211. Top surface limiting groove; 212. Gas transmission unit; 2121. Snap-fit ​​groove; 213. Signal acquisition unit; 2131. Snap-fit ​​part; 22. Mounting post; 221. Air inlet; 23. Sensor; 24. Communication connector;

[0041] 30. Fixing piece; 31. Fixing part; 311. Top surface fixing part; 312. Side fixing part; 313. Accommodating space; 32. Connecting part;

[0042] 40. Insulating parts; 41. Vent holes;

[0043] 50. Sealing components;

[0044] 2. Battery;

[0045] 60. Shell; 61. Receiving cavity;

[0046] 70. Electrode assembly. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are some, but not all, of the embodiments of this utility model.

[0048] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0049] Example 1:

[0050] Please see the appendix Figure 1 ~Appendix Figure 3 The battery top cover 1 of this utility model includes a top cover body 10, a signal acquisition mechanism 20, and a fixing piece 30.

[0051] In this regard, please combine Figure 1 , Figure 2 and Figure 3 , Figure 1 The diagram illustrates the structural relationship between the top cover body 10, the signal acquisition mechanism 20, and the fixing piece 30 in this embodiment of the present invention. Figure 2 and Figure 3The diagram illustrates the specific structure of the signal acquisition mechanism 20 and the fixing plate 30 in this embodiment of the present invention. Specifically, the top cover body 10 has a through hole 11; the signal acquisition mechanism 20 includes a mechanism body 21, a mounting post 22, a sensor 23, and a communication connector 24. The mounting post 22 is disposed on the bottom surface of the mechanism body 21 and has an air inlet 221. The sensor 23 is disposed inside the mechanism body 21. The communication connector 24 is horizontally disposed on the side of the mechanism body 21 and is electrically connected to the sensor 23. The mechanism body 21 is mounted on the through hole 11 and abuts against the top cover body 10. The mounting post 22 is embedded in the through hole 11. The sensor 23 communicates with the through hole 11 through the air inlet 221. The fixing plate 30 includes a fixing part 31 and a connecting part 32. The fixing part 31 presses the signal acquisition mechanism 20 onto the top cover body 10, and the connecting part 32 is connected to the fixing part 31 and the top cover body 10 respectively.

[0052] In this embodiment, the signal acquisition mechanism 20 is used to collect information such as air pressure and temperature inside the battery. The communication connector 24 is connected to the signal acquisition mechanism 20 and the external signal receiver. After the signal acquisition mechanism 20 collects information such as air pressure and temperature inside the battery, it feeds the information back to the external signal receiver through the communication connector 24. The signal receiver is connected to the battery management system through wired or wireless means, thereby realizing the effect of actively monitoring the changes in air pressure and temperature inside the battery, further improving the safety performance of the battery. The fixing piece 30 presses and fixes the signal acquisition mechanism 20 to the top cover body 10, ensuring the reliability of the overall structure. Specifically, the sensor 23 of the signal acquisition mechanism 20 is located inside the mechanism body 21, and the mounting post 22 is located on the bottom surface of the mechanism body 21 and embedded in the through hole 11 of the top cover body 10. The sensor 23 is connected to the through hole 11 through the air inlet 221 of the mounting post 22, allowing the gas inside the battery to be conducted to the sensor 23 through the air inlet 221. After the sensor 23 senses the air pressure and temperature inside the battery, it feeds back the information to the external signal receiver through the communication connector 24, thereby actively monitoring the air pressure and temperature inside the battery to achieve the purpose of active safety. Since the communication connector 24 is horizontally set on the side of the mechanism body 21, the overall structure of the signal acquisition mechanism 20 is more compact, avoiding the problem of damage to the communication connector 24 caused by external forces, while also saving space and avoiding affecting the assembly of the battery module and battery pack. The fixing part 31 of the fixing plate 30 abuts against the signal acquisition mechanism 20, and the connecting part 32 is connected to the fixing part 31 and the top cover body 10 respectively, so as to press and fix the signal acquisition mechanism 20 onto the top cover body 10, ensuring the connection stability between the signal acquisition mechanism 20 and the top cover body 10. Preferably, the fixing plate 30 can be connected to the top cover body 10 by welding, snap-fitting or screwing; the sensing element 23 can be a temperature sensor and / or a pressure sensor.

[0053] The aforementioned battery top cover 1 has a through hole 11 in its body 10. A mounting post 22 is positioned on the bottom surface of the mechanism body 21. A sensor 23 is located inside the mechanism body 21. A communication connector 24 is horizontally positioned on the side of the mechanism body 21 and electrically connected to the sensor 23. The mounting post 22 is embedded in the through hole 11 and has an air inlet 221. The sensor 23 communicates with the through hole 11 through the air inlet 221, allowing it to sense the internal air pressure and temperature of the battery. After sensing this information, the sensor 23 transmits it to an external signal receiver via the communication connector 24. Because the communication connector 24 is horizontally positioned on the side of the mechanism body 21, it avoids damage caused by external forces, saves space, and prevents interference with the assembly of the battery module and battery pack. A fixing piece 30 presses and fixes the signal acquisition mechanism 20 to the top cover body 10, making the overall structure more compact.

[0054] In some preferred embodiments, the fixing part 31 includes a top fixing part 311 and at least one side fixing part 312. The side fixing part 312 is connected to the top fixing part 311 and forms an accommodating space 313. The connecting part 32 is connected to the side fixing part 312 and the top cover body 10 respectively. The mechanism body 21 is installed in the accommodating space 313. The side of the fixing part 31 corresponding to the communication connector 24 is not provided with a side fixing part 312. The mechanism body 21 is installed in the accommodating space 313 formed by the side fixing part 312 and the top fixing part 311 to protect the mechanism body 21 and avoid the mechanism body 21 from being scratched by external objects, which could lead to damage. At the same time, the mechanism body 21 is limited and fixed from the top and sides, further ensuring the connection stability between the signal acquisition mechanism 20 and the top cover body 10. The side of the fixing part 31 corresponding to the communication connector 24 is not provided with a side fixing part 312 so that the communication connector 24 can be horizontally arranged on the side of the mechanism body 21.

[0055] In some preferred embodiments, the mechanism body 21 is cross-sectioned radially, and the shape of the mechanism body 21 is polygonal. The shape of the accommodating space 313 is also polygonal, matching the shape of the mechanism body 21. This improves the torsional resistance between the fixing plate 30 and the mechanism body 21, making the mechanism body 21 more securely fixed to the top cover body 10.

[0056] In some preferred embodiments, there are at least two side fixing portions 312 and at least two connecting portions 32. Two side fixing portions 312 are disposed opposite each other on both sides of the top fixing portion 311 and are respectively connected to the connecting portions 32. The top fixing portion 311 abuts against the top of the mechanism body 21 of the signal acquisition mechanism 20. The two oppositely disposed side fixing portions 312 are connected to opposite sides of the top fixing portion 311 to form a covering effect on the mechanism body 21. The two side fixing portions 312 are respectively connected to the connecting portions 32, thereby fixing the signal acquisition mechanism 20 to the top cover body 10. Preferably, the two oppositely disposed side fixing portions 312 abut against opposite sides of the mechanism body 21.

[0057] In some more preferred embodiments, please refer to Figure 2 , Figure 2 The diagram illustrates the structure of the top surface limiting groove 211 in this embodiment of the present invention. Specifically, the top surface of the mechanism body 21 has a top surface limiting groove 211, and the top surface fixing part 311 is embedded in the top surface limiting groove 211; and / or the side surface of the mechanism body 21 has a side limiting groove, and the side surface fixing part 312 is embedded in the side limiting groove. This improves the connection stability between the mechanism body 21 and the fixing piece 30, avoiding the problem of the mechanism body 21 moving and thus affecting the normal use of the signal acquisition mechanism 20; at the same time, the top surface limiting groove 211 and / or the side limiting groove facilitate the alignment and installation between the fixing piece 30 and the mechanism body 21, thus improving the convenience of structural assembly.

[0058] Example 2:

[0059] The difference between this embodiment and Embodiment 1 is that this embodiment further optimizes the structure of the battery top cover 1 of this utility model. Please refer to the appendix. Figure 4 ~Appendix Figure 5 .

[0060] Please see below. Figure 4 , Figure 4 The diagram illustrates the structural relationship between the gas transmission unit 212 and the signal acquisition unit 213 in this embodiment of the present invention. Specifically, the mechanism body 21 includes a gas transmission unit 212 and a signal acquisition unit 213. The signal acquisition unit 213 is mounted on the gas transmission unit 212, a mounting post 22 is disposed on the bottom surface of the gas transmission unit 212, a sensing element 23 is disposed inside the signal acquisition unit 213, and a communication connector 24 is horizontally disposed on the side of the signal acquisition unit 213. The gas transmission unit 212 is mounted on the through hole 11 and abuts against the top cover body 10.

[0061] In this embodiment, the gas transmission unit 212 is mounted on the through hole 11 and communicates with the through hole 11 through the air inlet 221 on the mounting post 22. The signal acquisition unit 213 is mounted on the gas transmission unit 212, so that the gas inside the battery is conducted to the sensor 23 inside the signal acquisition unit 213 through the through hole 11 and the air inlet 221, thereby enabling the sensor 23 to acquire the gas pressure and temperature information inside the battery and feed the information back to the external signal receiver through the communication connector 24.

[0062] In some preferred embodiments, the top surface of the gas transmission section 212 is provided with a snap-fit ​​groove 2121, and the bottom surface of the signal acquisition section 213 is provided with a snap-fit ​​part 2131 that engages with the snap-fit ​​groove 2121. The snap-fit ​​part 2131 engages with the snap-fit ​​groove 2121, so that the signal acquisition section 213 is snapped into the gas transmission section 212, facilitating the disassembly, assembly, or maintenance of the sensor 23. Of course, the signal acquisition section 213 can also be connected to the gas transmission section 212 by welding or embedding, or it can be integrally formed with the gas transmission section 212 as the mechanism body 21.

[0063] In some preferred embodiments, sealant is injected between the fixing part 31 and the gas transmission part 212 and the signal acquisition part 213. This improves the sealing between the gas transmission part 212 and the signal acquisition part 213, making the connection between them more secure and preventing dust and moisture from entering the interior of the gas transmission part 212 and the signal acquisition part 213, thus making the overall structure more reliable.

[0064] In some preferred embodiments, please refer to Figure 5 , Figure 5 The diagram illustrates the structural relationship between the top cover body 10 and the insulating member 40 in this embodiment of the invention. Specifically, the battery top cover 1 further includes the insulating member 40, which is disposed below the top cover body 10 and has a vent hole 41 communicating with the through hole 11. Gas inside the battery enters the gas transmission unit 212 through the vent hole 41 and the air inlet 221, and is then conducted to the sensor 23 inside the signal acquisition unit 213. After the sensor 23 senses information such as the gas pressure and temperature inside the battery, it feeds it back to the external signal receiver through the communication connector 24, thereby realizing active safety monitoring of the battery.

[0065] In some preferred embodiments, the battery top cover further includes a sealing element 50. A groove 101 surrounding the through hole 11 is formed on the upper surface of the top cover body 10 and / or the bottom surface of the mechanism body 21, and the sealing element 50 is embedded in the groove 101. This increases the airtightness of the connection between the signal acquisition mechanism 20 and the top cover body 10, ensuring the accuracy of information such as internal battery pressure and temperature.

[0066] In some more preferred embodiments, the through hole 11 is a liquid injection hole. The mounting post 22 of the signal acquisition mechanism 20 is embedded in the liquid injection hole, so that the sensor 23 can sense the air pressure and temperature information inside the battery. There is no need to open another hole on the top cover body 10. The overall structure is simple and easy to assemble. The liquid injection hole can be sealed by the signal acquisition mechanism 20 and the sealing element 50 instead of the sealing glue nail and sealing aluminum nail.

[0067] Example 3:

[0068] This embodiment, based on the above embodiments, provides a battery 2. Please refer to the appendix. Figure 6 .

[0069] A battery 2 includes a housing 60, an electrode assembly 70, and the aforementioned battery top cover 1.

[0070] The housing 60 includes a receiving cavity 61 with an opening; an electrode assembly 70 is installed in the receiving cavity 61; and a battery top cover 1 closes to the opening.

[0071] In this embodiment, the electrode assembly 70 is a cell formed by winding or stacking a separator, a positive electrode, and a negative electrode. The battery 2 described above can be a lithium-ion battery or a sodium-ion battery.

[0072] The battery 2 of this utility model has a top cover body 10 with a through hole 11, a mounting post 22 disposed on the bottom surface of the mechanism body 21, a sensor 23 disposed inside the mechanism body 21, and a communication connector 24 horizontally disposed on the side of the mechanism body 21 and electrically connected to the sensor 23. The mounting post 22 is embedded in the through hole 11 and has an air inlet 221. The sensor 23 communicates with the through hole 11 through the air inlet 221, enabling the sensor 23 to sense the air pressure and temperature inside the battery and feed back the sensed air pressure and temperature information to an external signal receiver through the communication connector 24. Because the communication connector 24 is horizontally disposed on the side of the mechanism body 21, it avoids the problem of the communication connector 24 being easily damaged by external forces, and at the same time saves space and avoids affecting the assembly of the battery module and battery pack. The fixing piece 30 presses and fixes the signal acquisition mechanism 20 to the top cover body 10, making the overall structure more compact.

[0073] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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 according to the specific circumstances.

[0074] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0075] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0076] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may 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" the first 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 first 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.

[0077] Although the description of this utility model has been given in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. A battery top cover, characterized in that, include: The top cover body (10) has a through hole (11); A signal acquisition mechanism (20) includes a mechanism body (21), a mounting post (22), a sensor (23), and a communication connector (24). The mounting post (22) is located on the bottom surface of the mechanism body (21), and an air inlet (221) is provided on the mounting post (22). The sensor (23) is located inside the mechanism body (21), and the communication connector (24) is horizontally located on the side of the mechanism body (21). The communication connector (24) is electrically connected to the sensor (23). The mechanism body (21) is mounted on the through hole (11) and abuts against the top cover body (10). The mounting post (22) is embedded in the through hole (11), and the sensor (23) communicates with the through hole (11) through the air inlet (221). The fixing plate (30) includes a fixing part (31) and a connecting part (32). The fixing part (31) presses the signal acquisition mechanism (20) onto the top cover body (10). The connecting part (32) is connected to the fixing part (31) and the top cover body (10) respectively.

2. The battery top cover according to claim 1, characterized in that, The fixing part (31) includes a top fixing part (311) and at least one side fixing part (312). The side fixing part (312) is connected to the top fixing part (311) and forms a receiving space (313). The connecting part (32) is connected to the side fixing part (312) and the top cover body (10) respectively. The mechanism body (21) is installed in the receiving space (313). The side of the fixing part (31) corresponding to the communication connector (24) is not provided with a side fixing part (312).

3. The battery top cover according to claim 2, characterized in that, A cross-section is taken along the radial direction of the mechanism body (21), the shape of the mechanism body (21) is polygonal, and the shape of the accommodating space (313) is a polygon that matches the shape of the mechanism body (21).

4. The battery top cover according to claim 2, characterized in that, The number of the side fixing part (312) and the connecting part (32) is at least two, wherein the two side fixing parts (312) are disposed opposite to each other on both sides of the top fixing part (311) and are respectively connected to the connecting part (32).

5. The battery top cover according to claim 2, characterized in that, The top surface of the mechanism body (21) is provided with a top surface limiting groove (211), and the top surface fixing part (311) is embedded in the top surface limiting groove (211); and / or The side of the mechanism body (21) is provided with a side limiting groove, and the side fixing part (312) is embedded in the side limiting groove.

6. The battery top cover according to claim 1, characterized in that, The main body (21) of the mechanism includes a gas transmission section (212) and a signal acquisition section (213). The signal acquisition section (213) is mounted on the gas transmission section (212). The mounting post (22) is disposed on the bottom surface of the gas transmission section (212). The sensing element (23) is disposed inside the signal acquisition section (213). The communication connector (24) is horizontally disposed on the side of the signal acquisition section (213). The gas transmission section (212) is covered and mounted on the through hole (11) and abuts against the top cover body (10).

7. The battery top cover according to claim 6, characterized in that, The gas transmission unit (212) has a snap-fit ​​groove (2121) on its top surface, and the signal acquisition unit (213) has a snap-fit ​​part (2131) on its bottom surface that engages with the snap-fit ​​groove (2121).

8. The battery top cover according to claim 6, characterized in that, Sealant is injected between the fixing part (31), the gas transmission part (212), and the signal acquisition part (213).

9. The battery top cover according to claim 1, characterized in that, The battery top cover also includes a sealing element (50), and the upper surface of the top cover body (10) and / or the bottom surface of the mechanism body (21) are provided with a groove (101) surrounding the through hole (11), and the sealing element (50) is embedded in the groove (101).

10. A battery, characterized in that, include: The housing (60) includes a receiving cavity (61) with an opening; Electrode assembly (70) is installed in the accommodating cavity (61); and The battery top cover (1) according to any one of claims 1 to 9; the battery top cover (1) covers the opening.

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