A battery cover plate

Abstract

This invention provides a battery cover, comprising: a ceramic sensor for detecting the temperature and pressure of the battery body; a metal film coated on the first bottom surface of the ceramic sensor; a fixing component for fixing the ceramic sensor; a cover for encapsulating the battery body; and an injection port disposed on the cover. The metal film is brazed to a first portion of the fixing component, and a second portion of the fixing component is laser-welded to the cover. The first and second portions are located at different positions on the fixing component. The detection part of the ceramic sensor communicates with the interior of the battery body through the injection port. This invention solves the problem that the internal air pressure of the battery cannot be actually tested after the battery injection port is sealed.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to an addressing method for devices in a battery management system. Background Technology

[0002] The electrolyte filling port assembly is a crucial safety component on the battery. It is used to seal the battery's electrolyte filling port, preventing the electrolyte from leaking out. However, once the electrolyte filling port is sealed, the internal pressure of the battery cannot be tested in real time during subsequent battery performance testing. Consequently, it is impossible to quantitatively analyze the internal pressure values ​​of the battery at different voltages. Therefore, the battery's safety monitoring mechanism is poor, resulting in lower battery safety. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides a battery cover that solves the problem of not being able to actually test the internal gas pressure of the battery body after the battery injection port is sealed. In this utility model, the detection unit of the ceramic sensor is connected to the inside of the battery body through the injection port to detect the pressure and temperature of the gas inside the battery body. This allows for the observation of various indicators of the battery during the formation and capacity testing process, thereby improving battery safety.

[0004] In a first aspect, this utility model provides a battery cover, comprising:

[0005] A ceramic sensor for detecting the temperature and pressure of the battery body; a metal film coated on the ceramic sensor; a fixture for fixing the ceramic sensor; a cover plate for encapsulating the battery body; and a liquid injection port on the cover plate; wherein,

[0006] The metal film is brazed to the first part of the fixing component, and the second part of the fixing component is laser-welded to the cover plate. The first part and the second part are located at different positions of the fixing component. The detection part of the ceramic sensor is connected to the inside of the battery body based on the liquid injection port.

[0007] In conjunction with the first aspect, in one alternative implementation,

[0008] A metal film is coated on the first bottom surface of the ceramic sensor;

[0009] The fastener is a first annular component, which includes: a first annular portion, a second annular portion, and a third annular portion;

[0010] The first part of the fastener includes: the second bottom surface of the first annular portion; the second part of the fastener includes: the third bottom surface of the third annular portion and the first side surface;

[0011] The metal film is brazed to the second bottom surface of the first annular portion; the third bottom surface and the first side surface of the third annular portion are laser welded to the cover plate respectively; and the second side surface of the second annular portion abuts against the third side surface of the ceramic sensor.

[0012] In conjunction with the first aspect, in one alternative implementation,

[0013] An adhesive is also provided between the second side of the second annular portion and the third side of the ceramic sensor.

[0014] In conjunction with the first aspect, in one alternative implementation,

[0015] A metal film is coated on the seventh bottom surface of the ceramic sensor;

[0016] The fastener is a second ring-shaped component;

[0017] The first part of the fastener includes: the fourth bottom surface of the second annular component; the second part of the fastener includes: the fifth bottom surface and the fourth side surface of the second annular component.

[0018] The metal film is brazed to the fourth bottom surface of the second annular component, and the cover plate is laser-welded to the fifth bottom surface and the fourth side surface of the second annular component, respectively; the detection part of the ceramic sensor is connected to the inside of the battery body based on the annular hole and the liquid injection port.

[0019] In conjunction with the first aspect, in one alternative implementation,

[0020] It also includes: an integrally stamped recess formed on the cover plate;

[0021] A metal film is coated on the first bottom surface of the ceramic sensor;

[0022] The fastener is a first annular component, which includes: a first annular portion, a second annular portion, and a third annular portion;

[0023] The first part of the fastener includes: the second bottom surface of the first annular portion; the second part of the fastener includes: the third bottom surface of the third annular portion and the first side surface;

[0024] The first annular component is placed in the recess, and the third bottom surface of the third annular portion abuts against the eighth bottom surface of the recess.

[0025] The metal film is brazed to the second bottom surface of the first annular portion;

[0026] The sixth bottom surface and the first side surface of the third annular portion are laser welded to the cover plate, and the second side surface of the second annular portion abuts against the third side surface of the ceramic sensor.

[0027] In conjunction with the first aspect, in one alternative implementation,

[0028] It also includes: an integrally stamped recess formed on the cover plate;

[0029] A metal film is coated on the seventh bottom surface of the ceramic sensor;

[0030] The fastener is a second ring-shaped component;

[0031] The first part of the fastener includes: the fourth bottom surface of the second annular component; the second part of the fastener includes: the fourth bottom surface and the fourth side surface of the second annular component;

[0032] The second annular component is placed in the recess, and the fifth bottom surface of the second annular component abuts against the eighth bottom surface of the recess. The metal film is brazed to the fourth bottom surface of the second annular component, and the cover plate is laser welded to the fourth bottom surface and the fourth side surface of the second annular component respectively. The detection part of the ceramic sensor is connected to the inside of the battery body based on the annular hole and the liquid injection port.

[0033] In conjunction with the first aspect, in one alternative implementation,

[0034] The cross-section of the ceramic sensor and the cross-section of the outer contour of the first annular component are both circular; or,

[0035] The cross-section of the ceramic sensor and the cross-section of the outer contour of the first annular component are both square; or,

[0036] The cross-section of the ceramic sensor, the cross-section of the outer contour of the first annular component, and the cross-section of the outer contour of the recess are all simultaneously circular; or,

[0037] The cross-section of the ceramic sensor, the cross-section of the outer contour of the first annular component, and the cross-section of the outer contour of the pit are all square at the same time.

[0038] In conjunction with the first aspect, in one alternative implementation,

[0039] The cross-section of the ceramic sensor and the cross-section of the outer contour of the second annular component are both circular; or,

[0040] The cross-section of the ceramic sensor and the cross-section of the outer contour of the second annular component are both square; or,

[0041] The cross-section of the ceramic sensor, the cross-section of the outer contour of the second annular component, and the cross-section of the outer contour of the recess are all simultaneously circular; or,

[0042] The cross-section of the ceramic sensor, the cross-section of the outer contour of the second annular component, and the cross-section of the outer contour of the pit are all square at the same time.

[0043] In conjunction with the first aspect, in one alternative embodiment, the fastener includes: an aluminum plate.

[0044] This invention provides a battery cover, comprising: a ceramic sensor for detecting the temperature and pressure of the battery body; a metal film coated on the first bottom surface of the ceramic sensor; a fixing component for fixing the ceramic sensor; a cover for encapsulating the battery body; and an injection port disposed on the cover. The metal film is brazed to a first portion of the fixing component, and a second portion of the fixing component is laser-welded to the cover. The first and second portions are located at different positions on the fixing component. The detection part of the ceramic sensor communicates with the inside of the battery body through the injection port to detect the pressure and temperature of the gas inside the battery body. This invention solves the problem of not being able to actually test the internal gas pressure of the battery after the injection port is sealed, and also enables observation of various indicators of the battery during the formation and capacity testing process, thus improving battery safety. Attached Figure Description

[0045] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 This is a schematic diagram of the exploded structure of a battery cover provided by this utility model;

[0047] Figure 2 This is a schematic diagram of the cross-sectional structure of another battery cover provided by this utility model;

[0048] Figure 3 This is a schematic diagram of the exploded structure of another battery cover provided by this utility model;

[0049] Figure 4 This is a schematic diagram of the exploded structure of another battery cover provided by this utility model;

[0050] Figure 5 This is a schematic diagram of the cross-sectional structure of another battery cover provided by this utility model;

[0051] Figure 6 This is a schematic diagram of another battery cover provided in this application;

[0052] Figure 7 This is a schematic diagram of the exploded structure of another battery cover provided in this application;

[0053] Figure 8 This is a schematic diagram of the cross-sectional structure of another battery cover provided by this utility model;

[0054] Figure 9 This is a schematic diagram of the exploded structure of another battery cover provided in this application;

[0055] Figure 10 This is a schematic diagram of the cross-sectional structure of another battery cover provided by this utility model;

[0056] Among them, 10-ceramic sensor, 101-first bottom surface, 102-third side surface, 103-seventh bottom surface, 20-cover plate, 201-liquid injection port, 202-recess, 2021-eighth bottom surface, 30-first annular component, 301-first annular portion, 3011-second bottom surface, 3012-sixth bottom surface, 302-second annular portion, 3021-second side surface, 303-third annular portion, 3031-first side surface, 3032-third bottom surface, 40-metal film, 50-second annular component, 501-fourth side surface, 502-fifth bottom surface, 503-annular hole, 504-fourth bottom surface. Detailed Implementation

[0057] The technical solutions of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0058] It should be noted that the terms "first," "second," "third," "fourth," "fifth," "sixth," "seventh," and "eighth" in this utility model are only used to distinguish different bottom surfaces, side surfaces, annular components, and ring-shaped parts in this utility model, and have no other special meanings, and should not limit the scope of protection of this utility model.

[0059] The appendix of this utility model can be combined with Figure 1-10 This utility model provides a battery cover, which may include, but is not limited to:

[0060] A ceramic sensor 10 for detecting the temperature and pressure of the battery body 60, a metal film 40 coated on the ceramic sensor 10, a fixing member for fixing the ceramic sensor 10, a cover plate 20 for encapsulating the battery body 60, and a liquid injection port 201 provided on the cover plate 20; wherein,

[0061] In this invention, the metal film 40 is a thin metal film, and the metal film 40 is coated on the first bottom surface 101 of the ceramic sensor 10.

[0062] The metal film 40 is brazed to the first part of the fixing member, and the second part of the fixing member is laser-welded to the cover plate 20. The first part and the second part of the fixing member are located at different positions of the fixing member. The detection part of the ceramic sensor 10 is connected to the inside of the battery body 60 through the liquid injection port 201 to detect the pressure and temperature of the gas inside the battery body 60. This solves the problem that the internal gas pressure of the battery cannot be actually tested after the liquid injection port is sealed. It also enables the observation of various indicators of the battery during the formation and capacity testing process, thus improving the safety of the battery.

[0063] With the fastener as the first annular component 30, combined Figure 1-3 The structure of the battery cover is described, such as... Figure 1-3 As shown, a metal film 40 is coated on the first bottom surface 101 of the ceramic sensor 10;

[0064] When the fastener is an integrally formed first annular component 30, and the first annular component 30 includes: a first annular portion 301, a second annular portion 302, and a third annular portion 303; the first part of the fastener may include: the second bottom surface 3011 of the first annular portion 301; the second part of the fastener may include: the third bottom surface 3032 and the first side surface 3031 of the third annular portion 303.

[0065] The metal film 40 is brazed to the second bottom surface 3011 of the first annular portion 301; the third bottom surface 3032 and the first side surface 3031 of the third annular portion 303 are laser welded to the cover plate 20 respectively; and the second side surface 3021 of the second annular portion 302 abuts against the third side surface 102 of the ceramic sensor 10.

[0066] It should be noted that an adhesive is also provided between the second side surface 3021 of the second annular portion 302 and the third side surface 102 of the ceramic sensor 10, that is, the second side surface 3021 of the second annular portion 302 and the third side surface 102 of the ceramic sensor 10 are also connected by adhesive.

[0067] The fastener is the second annular component 50, combined with Figure 4-6 The structure of the battery cover is described, such as... Figure 4-6 As shown,

[0068] The metal film 40 is coated on the seventh bottom surface 103 of the ceramic sensor 10; that is, the metal film 40 is coated on the seventh bottom surface 103 of the ceramic sensor 10 by welding.

[0069] When the fastener is a second annular component 50, the first part of the fastener includes: the fourth bottom surface 504 of the second annular component 50, and the second part of the fastener includes: the fifth bottom surface 502 and the fourth side surface 501 of the second annular component 50.

[0070] The metal film 40 is brazed to the fourth bottom surface 504 of the second annular component 50, and the cover plate 20 is laser welded to the fifth bottom surface 502 and the fourth side surface 501 of the second annular component 50, respectively; the detection part of the ceramic sensor 10 is connected to the inside of the battery body 60 based on the annular hole 503 and the liquid injection port 201.

[0071] like Figure 7-8 As shown,

[0072] The battery cover includes, in addition to a ceramic sensor 10 for detecting the temperature and pressure of the battery body 60, a metal film 40 coated on the ceramic sensor 10, a fastener for fixing the ceramic sensor 10, a cover 20 for encapsulating the battery body 60, and a liquid injection port 201 disposed on the cover 20, it may also include:

[0073] An integrally stamped recess 202 is formed on the cover plate 20;

[0074] A metal film 40 is coated on the first bottom surface 101 of the ceramic sensor 10;

[0075] The fastener is a first annular component 30, which includes a first annular portion 301, a second annular portion 302, and a third annular portion 303.

[0076] The first part of the fastener includes: the second bottom surface 3011 of the first annular portion 301; the second part of the fastener includes: the third bottom surface 3032 and the first side surface 3031 of the third annular portion 303.

[0077] The first annular component 30 is placed in the recess 202, and the third bottom surface 3032 of the third annular portion 303 abuts against the eighth bottom surface 2021 of the recess 202.

[0078] The metal film 40 is brazed to the second bottom surface 3011 of the first annular portion 301;

[0079] The sixth bottom surface 3012 and the first side surface 3031 of the third annular portion 303 are laser welded to the cover plate 20, and the second side surface 3021 of the second annular portion 302 abuts against the third side surface 102 of the ceramic sensor 10.

[0080] like Figure 9-10 As shown,

[0081] The battery cover includes: a ceramic sensor 10 for detecting the temperature and pressure of the battery body 60, a metal film 40 coated on the ceramic sensor 10, a fixing member for fixing the ceramic sensor 10, a cover 20 for encapsulating the battery body 60, and a liquid injection port 201 provided on the cover 20, and may also include:

[0082] An integrally stamped recess 202 is formed on the cover plate 20;

[0083] It should be noted that,

[0084] A metal film 40 is coated on the seventh bottom surface 103 of the ceramic sensor 10;

[0085] The fastener is a second annular component 50 that is integrally formed;

[0086] The first part of the fastener includes: the fourth bottom surface 504 of the second annular member 50; the second part of the fastener includes: the fourth bottom surface 504 and the fourth side surface 501 of the second annular member 50.

[0087] The second annular component 50 is placed in the recess 202, and the fifth bottom surface 502 of the second annular component 50 abuts against the eighth bottom surface 2021 of the recess 202. The metal film 40 is brazed to the fourth bottom surface 504 of the second annular component 50, and the cover plate 20 is laser welded to the fourth bottom surface 504 and the fourth side surface 501 of the second annular component 50, respectively. The detection part of the ceramic sensor 10 is connected to the inside of the battery body 60 based on the annular hole 503 and the liquid injection port 201.

[0088] Optionally, the depth of the recess 202 is equal to the side width of the fourth side 501.

[0089] Optionally,

[0090] The cross-section of the ceramic sensor 10 and the cross-section of the outer contour of the first annular component 30 are both circular; or,

[0091] The cross-section of the ceramic sensor 10 and the cross-section of the outer contour of the first annular component 30 are both square; or,

[0092] The cross-sections of the ceramic sensor 10, the outer contour of the first annular component 30, and the outer contour of the recess 202 are all simultaneously circular; or,

[0093] The cross-section of the ceramic sensor 10, the cross-section of the outer contour of the first annular component 30, and the cross-section of the outer contour of the recess 202 are all square at the same time.

[0094] Optionally, the cross-section of the ceramic sensor 10 and the cross-section of the outer contour of the second annular component 50 are both circular; or,

[0095] The cross-section of the ceramic sensor 10 and the cross-section of the outer contour of the second annular component 50 are both square; or,

[0096] The cross-sections of the ceramic sensor 10, the outer contour of the second annular component 50, and the outer contour of the recess 202 are all simultaneously circular; or,

[0097] The cross-section of the ceramic sensor 10, the cross-section of the outer contour of the second annular component 50, and the cross-section of the outer contour of the recess 202 are all square.

[0098] Optionally, the shape of the metal film 40 includes: ring or square.

[0099] Optionally, the fastener in this utility model may include: an aluminum plate.

[0100] It should be noted that the ceramic sensor 10 includes a communication unit that sends the detected temperature and pressure data of the battery body 20 to the battery management device. The battery management device is used to determine whether the temperature and pressure are abnormal, so as to monitor the health of the battery body 20, detect abnormal batteries in advance, and avoid the occurrence of serious events.

[0101] For Figure 1-10 This is only used to illustrate the embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0102] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A battery cover, characterized in that, include: A ceramic sensor (10) for detecting the temperature and pressure of the battery body (60), a metal film (40) coated on the ceramic sensor (10), a fixing member for fixing the ceramic sensor (10), a cover plate (20) for encapsulating the battery body (60), and a liquid injection port (201) provided on the cover plate (20); wherein, The metal film (40) is brazed to the first part of the fixing member, and the second part of the fixing member is laser welded to the cover plate (20). The first part and the second part are located at different positions of the fixing member. The detection part of the ceramic sensor (10) is connected to the inside of the battery body (60) based on the liquid injection port (201).

2. The battery cover as described in claim 1, characterized in that, A metal film (40) is coated on the first bottom surface (101) of the ceramic sensor (10); The fastener is a first annular component (30), which includes a first annular portion (301), a second annular portion (302), and a third annular portion (303). The first part of the fastener includes: the second bottom surface (3011) of the first annular portion (301); the second part of the fastener includes: the third bottom surface (3032) and the first side surface (3031) of the third annular portion (303); The metal film (40) is brazed to the second bottom surface (3011) of the first annular portion (301); the third bottom surface (3032) and the first side surface (3031) of the third annular portion (303) are laser welded to the cover plate (20) respectively; the second side surface (3021) of the second annular portion (302) abuts against the third side surface (102) of the ceramic sensor (10).

3. The battery cover as described in claim 2, characterized in that, An adhesive is also provided between the second side (3021) of the second annular portion (302) and the third side (102) of the ceramic sensor (10).

4. The battery cover as described in claim 1, characterized in that, A metal film (40) is coated on the seventh bottom surface (103) of the ceramic sensor (10); The fastener is a second annular component (50); The first part of the fastener includes: the fourth bottom surface (504) of the second annular member (50), and the second part of the fastener includes: the fifth bottom surface (502) and the fourth side surface (501) of the second annular member (50). The metal film (40) is brazed to the fourth bottom surface (504) of the second annular component (50), and the cover plate (20) is laser welded to the fifth bottom surface (502) and the fourth side surface (501) of the second annular component (50); the detection part of the ceramic sensor (10) is connected to the inside of the battery body (60) based on the annular hole (503) and the liquid injection port (201).

5. The battery cover as described in claim 1, characterized in that... It also includes: an integrally stamped recess (202) formed on the cover plate (20); A metal film (40) is coated on the first bottom surface (101) of the ceramic sensor (10); The fastener is a first annular component (30), which includes a first annular portion (301), a second annular portion (302), and a third annular portion (303). The first part of the fastener includes: the second bottom surface (3011) of the first annular portion (301); the second part of the fastener includes: the third bottom surface (3032) and the first side surface (3031) of the third annular portion (303); The first annular component (30) is placed in the recess (202), and the third bottom surface (3032) of the third annular portion (303) abuts against the eighth bottom surface (2021) of the recess (202). The metal film (40) is brazed to the second bottom surface (3011) of the first annular portion (301); The sixth bottom surface (3012) and the first side surface (3031) of the third annular portion (303) are laser welded to the cover plate (20) respectively, and the second side surface (3021) of the second annular portion (302) abuts against the third side surface (102) of the ceramic sensor (10).

6. The battery cover as described in claim 1, characterized in that, It also includes: an integrally stamped recess (202) formed on the cover plate (20); A metal film (40) is coated on the seventh bottom surface (103) of the ceramic sensor (10); The fastener is a second annular component (50); The first part of the fastener includes: the fourth bottom surface (504) of the second annular member (50); the second part of the fastener includes: the fourth bottom surface (504) and the fourth side surface (501) of the second annular member (50); The second annular component (50) is placed in the recess (202). The fifth bottom surface (502) of the second annular component (50) abuts against the eighth bottom surface (2021) of the recess (202). The metal film (40) is brazed to the fourth bottom surface (504) of the second annular component (50). The cover plate (20) is laser welded to the fourth bottom surface (504) and the fourth side surface (501) of the second annular component (50). The detection part of the ceramic sensor (10) is connected to the inside of the battery body (60) based on the annular hole (503) and the liquid injection port (201).

7. The battery cover as described in claim 5, characterized in that... The cross-section of the ceramic sensor (10) and the cross-section of the outer contour of the first annular component (30) are both circular; or, The cross-section of the ceramic sensor (10) and the cross-section of the outer contour of the first annular component (30) are both square; or, The cross-section of the ceramic sensor (10), the cross-section of the outer contour of the first annular component (30), and the cross-section of the outer contour of the recess (202) are all simultaneously circular; or, The cross-section of the ceramic sensor (10), the cross-section of the outer contour of the first annular component (30), and the cross-section of the outer contour of the pit (202) are all square at the same time.

8. The battery cover as described in claim 6, characterized in that... The cross-section of the ceramic sensor (10) and the cross-section of the outer contour of the second annular component (50) are both circular; or, The cross-section of the ceramic sensor (10) and the cross-section of the outer contour of the second annular component (50) are both square; or, The cross-sections of the ceramic sensor (10), the outer contour of the second annular component (50), and the outer contour of the recess (202) are all circular; or, The cross-section of the ceramic sensor (10), the cross-section of the outer contour of the second annular component (50), and the cross-section of the outer contour of the pit (202) are all square at the same time.

9. The battery cover as described in any one of claims 1-8, characterized in that, The shape of the metal film (40) includes: ring or square.

10. The battery cover as described in any one of claims 1-8, characterized in that, The fasteners include: aluminum plates.

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