Stop frame and cover plate assembly of power battery

Abstract

The utility model discloses a stop frame and cover plate assembly of a power battery. The stop frame and cover plate assembly comprises a stop frame body, a mounting hole, an air hole and a communicating groove, the mounting hole is formed in the stop frame body; the air holes are formed in the two sides of the stop frame body. The communicating groove is formed in the upper surface of the stop frame body, and the two ends of the communicating groove extend to communicate with the mounting hole and the air hole correspondingly. The utility model relates to the technical field of power batteries, and through the arrangement, when a sealing ring is not pre-mounted between the stop frame and the cover plate body and the stop frame and the cover plate body are riveted, the stop frame and the cover plate body cannot be completely sealed, so that whether the sealing ring is mounted or not can be effectively identified in a subsequent helium detection process, and the reliability of the sealing ring is improved. Therefore, the safety problems of battery liquid leakage and the like caused by the fact that the sealing ring is not installed are avoided.

Description

Technical Field

[0001] The utility model belongs to the field of power batteries and relates to a power battery cover plate assembly technology, in particular to a stop frame and a cover plate assembly of a power battery. Background Art

[0002] Some battery cover manufacturing techniques commonly utilize a combination of assembly, riveting, welding, and helium testing to ensure the sealability of the battery cover. However, this process has a significant flaw: when riveting the stopper frame to the cover body, if a sealing ring is not pre-installed, the stopper frame may form a temporary seal with the cover due to compression during the riveting process, misleading the subsequent helium test process to determine that the battery is qualified. In this case, the lack of effective sealing ring protection during subsequent use can easily lead to leakage problems, seriously affecting the battery's safety and service life.

[0003] Therefore, a stopping frame and a cover plate assembly for a power battery are needed to solve the above problems. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art; to this end, the present invention proposes a stop frame and a cover plate assembly for a power battery, so that when a sealing ring is not pre-installed between the stop frame and the cover plate body and riveted, the stop frame and the cover plate body will not be completely sealed, so that in the subsequent helium inspection process, it is possible to effectively identify whether the sealing ring is installed, thereby avoiding safety problems such as battery leakage caused by the failure to install the sealing ring. The utility model provides a stop frame including a stop frame body, a mounting hole, a vent hole and a connecting groove, and the two ends of the connecting groove are respectively connected to the mounting hole and the vent hole. Therefore, when the stop frame body and the cover plate body are riveted, a gas flow channel consisting of the mounting hole, the connecting groove and the vent hole will be formed between the cover plate body and the stop frame body for the flow of helium in the helium detection process. Therefore, when the sealing ring is not installed between the stop frame body and the cover plate body and the helium detection is performed, a sealed state will not be formed between the stop frame body and the cover plate body, so that it can be identified by the helium detection process. When the sealing ring is installed, the sealing ring will block the connecting groove, and accordingly, the gas flow channel will be blocked, that is, it is ensured that the setting of the connecting groove will not interfere with the detection of the overall helium detection process, thereby avoiding safety problems such as battery leakage caused by the lack of a sealing ring.

[0005] To achieve the above-mentioned object, the first aspect of the present invention provides a stopper frame for a power battery, comprising a stopper frame body, a mounting hole, a vent hole, and a communication groove;

[0006] The mounting hole is provided on the stop frame body;

[0007] The vent holes are arranged on both sides of the stop frame body;

[0008] The communicating groove is arranged on the upper surface of the stopping frame body, and two ends thereof extend to communicate with the mounting hole and the vent hole respectively.

[0009] Furthermore, the communicating groove is configured as a long strip structure.

[0010] Furthermore, the depth of the connecting groove is 0.2mm-0.4mm.

[0011] Furthermore, both sides of the stop frame body have positioning protrusions extending outwards;

[0012] The vent hole is arranged in the positioning protrusion.

[0013] On the other hand, the present invention also provides a stopper frame for a power battery, comprising a stopper frame body, a mounting hole, and a connecting groove;

[0014] The mounting hole is provided on the stop frame body;

[0015] The communicating groove is arranged on the upper surface of the stopping frame body, and one end of the communicating groove is communicated with the mounting hole, and the other end of the communicating groove passes through the stopping frame body.

[0016] On the other hand, the present invention also provides a cover assembly for a power battery, comprising a cover body, a weak guide plate, a pressure plate, a seal, a stopper frame for a power battery as described in the above embodiment, and a rivet.

[0017] The cover plate body, the weak guide plate and the pressure plate are arranged on the stop frame body from bottom to top, and the sealing member is arranged in the mounting hole;

[0018] The cover plate body, the weak guide plate, the pressure plate, and the sealing member are riveted to the stop frame body by the rivet member;

[0019] A gas flow channel is formed between the cover plate body and the stop frame body for detecting helium;

[0020] Wherein, when the sealing member is riveted to the stop frame body, the sealing member is deformed and blocks the communicating groove.

[0021] Furthermore, the sealing member is configured as a sealing ring.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] By providing a stop frame including a stop frame body, a mounting hole, a vent hole, and a connecting groove, and making the two ends of the connecting groove communicate with the mounting hole and the vent hole respectively, when the stop frame body and the cover plate body are riveted, a gas flow channel consisting of the mounting hole, the connecting groove, and the vent hole will be formed between the cover plate body and the stop frame body for the flow of helium in the helium inspection process. In this way, the airtightness test can be completed by the helium inspection method, and negative feedback can be provided on whether the sealing ring is installed, thereby avoiding safety problems such as battery leakage caused by the failure to install the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a structural diagram of a stop frame of a power battery in one embodiment of the present utility model;

[0026] Figure 2 A top view of a stop bracket for a power battery in another embodiment of the present invention;

[0027] Figure 3 This is a structural diagram of a cover plate assembly of a power battery in one embodiment of the present utility model;

[0028] Figure 4 It is a cross-sectional view of a cover plate assembly of a power battery in one embodiment of the present utility model.

[0029] Figure Number:

[0030] 1. Stop frame body; 11. Positioning protrusion; 2. Mounting hole; 3. Ventilation hole; 4. Connecting groove; 5. Cover body; 6. Weak guide plate; 7. Pressure plate; 8. Sealing element; 9. Rivet. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] Example 1

[0033] See also Figure 1The first embodiment of the present invention provides a stop frame for a power battery, including a stop frame body 1, a mounting hole 2, a vent hole 3 and a connecting groove 4.

[0034] The mounting hole 2 is provided on the stop frame body 1 , and the vent holes 3 are provided on both sides of the stop frame body 1 .

[0035] In addition, the communicating groove 4 is provided on the upper surface of the stop frame body 1, and its two ends extend to communicate with the mounting hole 2 and the air vent 3 respectively, so that the stop frame body 1 and the cover plate body 5 are not riveted together by a sealing ring, and when the stop frame body 1 is deformed to fit with the cover plate body 5, a gas flow channel passing through the mounting hole 2, the communicating groove 4 and the air vent 3 is still formed, that is, the two are not completely sealed, so that when the helium test is performed, helium will flow out from the gas flow channel and be detected as unqualified, thereby avoiding the situation in the prior art where the stop frame body 1 is deformed to fit with the cover plate body 5 and form a sealed state, resulting in the battery being mistakenly considered qualified during the helium test, thereby avoiding the subsequent battery leakage due to sealing problems.

[0036] In this embodiment, the communicating groove 4 is configured as a long strip structure.

[0037] The depth of the connecting groove 4 is 0.2 mm to 0.4 mm. Preferably, the depth of the connecting groove 4 is 0.3 mm, so as to ensure that the gas flow channel is formed without affecting the strength of the stop frame body 1 itself.

[0038] In a further embodiment, both sides of the stopper body 1 have outwardly extending positioning protrusions 11, and the air holes 3 are disposed within the positioning protrusions 11. This allows helium testing of the cover assembly formed by the stopper body 1 to ensure that helium testing gas can be transferred from the upper portion to the lower portion of the cover assembly, thereby detecting whether the cover assembly's sealing performance is acceptable.

[0039] Example 2

[0040] like Figure 2 As shown, the difference between this embodiment and the first embodiment is that a new stopper frame for a power battery is proposed, so that there is no need to set air holes 3 on both sides of the stopper frame body 1, and a gap for helium circulation can be formed, thereby improving the applicability of the stopper frame.

[0041] Specifically, the stopper frame of the power battery includes a stopper frame body 1 , a mounting hole 2 and a communicating groove 4 .

[0042] The mounting hole 2 is provided on the stopper body 1, and the connecting groove 4 is provided on the upper surface of the stopper body 1, with one end communicating with the mounting hole 2 and the other end extending through the stopper body 1. Even when the stopper body 1 and the cover body 5 are deformed and fitted, a gas flow channel formed by the mounting hole 2 and the connecting groove 4 is formed. This facilitates the identification and detection of the sealing ring during the helium inspection process, effectively preventing battery leakage caused by the missing sealing ring.

[0043] Example 3

[0044] like Figure 3 and Figure 4 As shown, this embodiment further proposes a cover assembly for a power battery based on the first or second embodiment, including a cover body 5, a weak guide plate 6, a pressure plate 7, a seal 8, a stop frame for a power battery described in the first or second embodiment, and a rivet 9.

[0045] The cover plate body 5 , the weak guide plate 6 and the pressure plate 7 are arranged on the stop frame body 1 from bottom to top, and the sealing member 8 is arranged in the mounting hole 2 .

[0046] Furthermore, the cover plate body 5 , the weak guide plate 6 , the pressure plate 7 , and the sealing member 8 are riveted to the stop frame body 1 through the rivet member 9 .

[0047] In addition, a gas circulation channel is formed between the cover plate body 5 and the stop frame body 1 (such as the gas circulation channel formed by the mounting hole 2, the air vent 3 and the connecting groove 4 in the first embodiment or the gas circulation channel formed by the mounting hole 2 and the connecting groove 4 in the second embodiment) for detecting helium to complete the detection and identification of whether the seal 8 is installed.

[0048] Among them, when the seal 8 is riveted to the stop frame body 1, the seal 8 is deformed and blocks the connecting groove 4. That is, when the seal 8 is correctly installed, it can block the connecting groove 4 to ensure the sealing performance. That is, the setting of the connecting groove 4 only serves to cooperate with helium in the subsequent helium inspection process to complete the function of detecting whether the seal 8 is installed, and will not interfere with the overall sealing of the cover assembly (that is, with the seal 8 installed), thereby ensuring the normal application of the cover assembly.

[0049] In this embodiment, the sealing member 8 is configured as a sealing ring.

[0050] Taking the stop frame proposed in Example 1 as an example, the present device is provided with a stop frame including a stop frame body 1, a mounting hole 2, a vent hole 3 and a connecting groove 4, and the two ends of the connecting groove 4 are respectively connected to the mounting hole 2 and the vent hole 3. Therefore, when the stop frame body 1 and the cover plate body 5 are riveted, a gas flow channel consisting of the mounting hole 2, the connecting groove 4 and the vent hole 3 will be formed between the cover plate body 5 and the stop frame body 1 for the flow of helium in the helium inspection process. In this way, the airtightness test can be completed by helium inspection, and negative feedback can be provided on whether the sealing ring is installed, thereby avoiding safety problems such as battery leakage caused by the failure to install the sealing ring.

[0051] The above embodiments are only used to illustrate the technical method of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A stop bracket for a power battery, characterized in that: It comprises a stop frame body (1), a mounting hole (2), a vent hole (3) and a connecting groove (4); The mounting hole (2) is provided on the stop frame body (1); The vent holes (3) are arranged on both sides of the stop frame body (1); The communicating groove (4) is arranged on the upper surface of the stop frame body (1), and its two ends extend to communicate with the mounting hole (2) and the air vent (3) respectively.

2. A power battery stop bracket according to claim 1, characterized in that: The communicating groove (4) is configured as a long strip structure.

3. The stopping frame of a power battery according to claim 1, characterized in that: The depth of the connecting groove (4) is 0.2 mm to 0.4 mm.

4. The stopping frame of a power battery according to claim 1, characterized in that: Both sides of the stop frame body (1) are provided with positioning protrusions (11) extending outwards; The vent hole (3) is arranged in the positioning protrusion (11).

5. A stop bracket for a power battery, characterized in that: It comprises a stop frame body (1), a mounting hole (2) and a communicating groove (4); The mounting hole (2) is provided on the stop frame body (1); The communicating groove (4) is arranged on the upper surface of the stop frame body (1), with one end communicating with the mounting hole (2) and the other end penetrating the stop frame body (1).

6. A cover plate assembly for a power battery, characterized in that: It comprises a cover plate body (5), a weak guide plate (6), a pressure plate (7), a sealing member (8), a stop frame of a power battery as claimed in claim 1 or 5, and a rivet member (9); The cover plate body (5), the weak guide plate (6) and the pressure plate (7) are arranged on the stop frame body (1) from bottom to top, and the sealing member (8) is arranged in the mounting hole (2); The cover plate body (5), the weak guide plate (6), the pressure plate (7), and the sealing member (8) are riveted to the stop frame body (1) via the rivet member (9); The cover plate body (5) and the stop frame body (1) form a gas flow channel for detecting helium; When the sealing member (8) is riveted to the stop frame body (1), the sealing member (8) is deformed and blocks the communicating groove (4).

7. The cover plate assembly of a power battery according to claim 6, characterized in that: The sealing member (8) is configured as a sealing ring.

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