A battery cover plate

Abstract

The utility model provides a battery cover plate, include: sensor wafer, cover plate, the hole that is set up on the cover plate, the recess that is set up on the cover plate along the hole, the liquid injection port that is set up on the cover plate and the battery positive pole and battery negative pole of setting on the cover plate, wherein, the battery main part sensor wafer is placed on the recess, and the detection part of sensor wafer is communicated with the inside of battery main part through the hole to detect the pressure and temperature of the inside of battery main part, a plurality of arc holes and a plurality of connecting columns are set up on sensor wafer, a plurality of arc holes are the through hole respectively, and the connecting column is set up between arc holes, so that when the inside pressure of battery main part is abnormal, the connecting column breaks, to carry out pressure relief to the inside of battery main part. Adopt the utility model, can realize the real -time detection of the pressure and temperature of battery main part's inside, still can utilize sensor wafer to carry out pressure relief when the inside pressure of battery main part is abnormal, has reduced the cost of additional purchase safety pressure relief valve.

Description

Technical Field

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

[0002] If an abnormal situation occurs during the use of a power lithium battery, the internal pressure may rise rapidly, even leading to an explosion. To improve battery safety, a safety pressure relief valve is usually installed on the battery cover. However, ordinary safety pressure relief valves often use an explosion-proof diaphragm structure, and these diaphragms are expensive. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a battery cover plate, which can detect the temperature and pressure inside the battery body by using a sensor sheet with a specific structure. It can also act as a pressure relief valve. When the air pressure inside the battery body is abnormal, the sensor sheet can be used to relieve the pressure inside the battery body, thereby reducing the risk of battery explosion and reducing the cost of purchasing additional safety pressure relief valves.

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

[0005] The sensor sheet, cover plate, holes in the cover plate, recesses along the holes in the cover plate, liquid injection ports in the cover plate, a positive battery terminal on the cover plate, and a negative battery terminal on the cover plate; wherein,

[0006] The sensor sheet is placed on a recessed platform, and the detection part of the sensor sheet is connected to the inside of the battery body through holes to detect the internal pressure and temperature of the battery body. The sensor sheet has multiple arc-shaped holes and multiple connecting posts. The multiple arc-shaped holes are all through holes, and the connecting posts are arranged between the arc-shaped holes so that when the internal pressure of the battery body is abnormal, causing the connecting posts to break, the internal pressure of the battery body can be relieved.

[0007] In conjunction with the first aspect, in an optional embodiment, the contact portion between the recess and the sensor sheet is further connected by adhesive bonding or laser welding.

[0008] In conjunction with the first aspect, in one optional implementation, the cross-section of the outer contour of the sensor sheet, the cross-section of the hole, and the cross-section of the recess are all simultaneously circular; or,

[0009] The cross-sections of the outer contour of the sensor sheet, the cross-section of the hole, and the cross-section of the recess are all square.

[0010] This utility model provides a battery cover plate, comprising: a sensor sheet, a cover plate, holes in the cover plate, recesses along the holes in the cover plate, an injection port in the cover plate, a positive battery terminal on the cover plate, a negative battery terminal on the cover plate, and a battery body; wherein, the sensor sheet is placed on the recesses, and the detection part of the sensor sheet communicates with the interior of the battery body through the holes to detect the internal pressure and temperature of the battery body; the sensor sheet has multiple arc-shaped holes and multiple connecting posts, the multiple arc-shaped holes being through holes, and the connecting posts being disposed between the arc-shaped holes, so that when the internal pressure of the battery body is abnormal, the connecting posts break to release the internal pressure of the battery body. Using this utility model, when the internal pressure of the battery body is abnormal, the sensor sheet is used to release pressure, reducing the cost of purchasing an additional safety pressure relief valve. Attached Figure Description

[0011] 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.

[0012] Figure 1 This is a schematic diagram of the structure of a battery cover provided by this utility model;

[0013] Figure 2 This is a schematic diagram of the exploded structure of a battery cover provided by this utility model;

[0014] Figure 3 This is a schematic diagram of the structure of a sensor sheet 1 provided by this utility model;

[0015] Figure 4 This is a schematic diagram of another exploded structure of a battery cover provided by this utility model;

[0016] Figure 5 This is a schematic diagram of another structure of a battery cover provided by this utility model;

[0017] Among them, 1-sensor sheet, 11-detection part, 12-arc-shaped hole, 13-connecting post, 2-hole, 3-cover plate, 31-recess, 4-liquid injection port, 5-battery positive electrode, 6-battery negative electrode, 7-battery body. Detailed Implementation

[0018] 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.

[0019] Figure 1 This is a structural schematic diagram of a battery cover provided by this utility model. Figure 2 This is a schematic diagram of the exploded structure of the battery cover provided by this utility model. Figure 3 This is a schematic diagram of the structure of the sensor sheet 1 provided by this utility model. Figure 4 This is a schematic diagram of another exploded structure of the battery cover provided by this utility model. Figure 5 This is another structural schematic diagram of the battery cover provided by this utility model.

[0020] Referring to the accompanying drawings, this utility model provides a battery cover, which may include, but is not limited to:

[0021] The sensor includes a thin sheet 1, a cover plate 3, holes 2 in the cover plate 3, recesses 31 along the holes 2 in the cover plate 3, a liquid injection port 4 in the cover plate 3, a positive battery electrode 5 on the cover plate 3, and a negative battery electrode 6 on the cover plate 3.

[0022] The sensor sheet 1 is placed on the recessed platform 31, and the detection part 11 of the sensor sheet 1 is connected to the interior of the battery body 7 through the hole 2. On the one hand, it can detect the internal pressure and temperature of the battery body 7. The sensor sheet 1 has multiple arc-shaped holes 12 and multiple connecting posts 13. The multiple arc-shaped holes 12 are all through holes, and the connecting posts 13 are arranged between the arc-shaped holes 12. On the other hand, when the internal pressure of the battery body 7 is abnormal, causing the connecting post 13 to break, the battery body 7 can be connected to the external environment (such as the natural environment) where the battery body 7 is located, so as to relieve the internal pressure of the battery body 7 and reduce the risk of battery explosion.

[0023] In summary, the sensor sheet 1 placed on the protrusion 31 of the hole 2 provided by this utility model can not only detect the internal temperature and pressure of the battery body 7, but also, due to the thinness of the sensor sheet 1 and the design of the arc-shaped hole 12 and the connecting post 13 on the sensor sheet 1, can also act as a pressure relief and explosion-proof valve. When the internal air pressure of the battery body 7 is abnormal, it can relieve the pressure inside the battery body 7 to prevent the battery from exploding.

[0024] Preferably, the number of arc-shaped holes 12 can be a positive integer (e.g., 4); the number of connecting posts 13 can be a positive integer (e.g., 4).

[0025] Preferably, the contact portion between the recessed platform 31 and the sensor sheet 1 is also connected by adhesive or laser welding to fix the sensor sheet 1.

[0026] Preferably, the cross-section of the outer contour of the sensor sheet 1, the cross-section of the hole 2, and the cross-section of the recess 31 are all circular; or,

[0027] The cross-sections of the outer contour of the sensor sheet 1, the hole 2, and the recess 31 are all square at the same time. For example, the cross-sections of the outer contour of the sensor sheet 1, the hole 2, and the recess 31 are all rectangular, hexagonal, or rhomboid at the same time.

[0028] Preferably, the material of the connecting post 13 may include, but is not limited to, plastic or rubber; the electrolyte inlet 4 is used to inject electrolyte into the interior of the battery body 7.

[0029] In addition to the sensor sheet 1, which includes a detection unit 11, an arc-shaped hole 12, and a connecting post 13, it may also include, but is not limited to, a PCB circuit board; wherein,

[0030] The PCB circuit board is electrically connected to the detection unit 11. The PCB circuit board can be used to send the temperature and pressure data of the battery body 7 detected by the detection unit 11 to the battery detection equipment connected to the sensor sheet 1 in real time.

[0031] Figure 1-5 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.

[0032] The above are merely optional embodiments of this utility model and do not limit the patent scope of this utility model. All equivalent structural transformations made based on the contents of this utility model specification and drawings under the application concept of this utility model, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A battery cover, characterized in that, include: The sensor sheet (1), cover plate (3), holes (2) in the cover plate (3), recesses (31) along the holes (2) in the cover plate (3), liquid injection ports (4) in the cover plate (3), a positive battery electrode (5) on the cover plate (3), and a negative battery electrode (6) on the cover plate (3); wherein, The sensor sheet (1) is placed on the recessed platform (31), and the detection part (11) of the sensor sheet (1) is connected to the inside of the battery body (7) through the hole (2) to detect the pressure and temperature inside the battery body (7). The sensor sheet (1) is provided with multiple arc-shaped holes (12) and multiple connecting posts (13). The multiple arc-shaped holes (12) are all through holes. The connecting posts (13) are arranged between the arc-shaped holes (12) so that when the internal pressure of the battery body (7) is abnormal, causing the connecting post (13) to break, the internal pressure of the battery body (7) can be relieved.

2. The battery cover as described in claim 1, characterized in that, The contact portion between the recessed platform (31) and the sensor sheet (1) is also connected by adhesive bonding or laser welding.

3. The battery cover as described in claim 1, characterized in that, The cross-sections of the outer contour of the sensor sheet (1), the hole (2), and the recess (31) are all circular; or, The cross-section of the outer contour of the sensor sheet (1), the cross-section of the hole (2), and the cross-section of the recess (31) are all square.

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