Top cover plate assembly and secondary battery

Abstract

The utility model provides a top cover plate assembly and a secondary battery, and relates to the technical field of new energy, the top cover plate assembly comprises an insulation protection piece, two air leakage abutting protrusions are arranged between two second positioning protrusions, two ends of the air leakage abutting protrusions are respectively connected with one second positioning protrusion, and the insulation protection piece is arranged between the two second positioning protrusions. The two air leakage abutting protrusions form a pressure relief area, and the pressure relief valve is arranged in the pressure relief area. And at least one first air leakage channel is arranged on the air leakage abutting bulge. According to the top cover plate assembly provided by the utility model, the second positioning bulges are arranged on the insulating protection piece, the second positioning bulges can be used for abutting against the battery cell assembly, and the air leakage abutting bulge is arranged between the two second positioning bulges; the air leakage abutting protrusion can abut against the battery cell assembly, and a first air leakage channel is formed in the air leakage abutting protrusion; the air leakage abutting protrusion can prevent the battery cell assembly from shaking, the first air leakage channel can be used for air to pass through, and the air leakage efficiency is guaranteed.

Description

Technical Field

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

[0002] Existing secondary batteries have an insulating layer beneath the top cover. The middle portion of this insulating layer has a raised structure to hold the electrode assembly in place and prevent movement. Additionally, venting areas are provided at corresponding positions on the insulating layer and the pressure relief valve.

[0003] The pressure relief area of ​​the insulating component is lower than the surface where the boss contacts the electrode assembly, and the bosses are only provided at both ends along the thickness direction of the battery. In this way, the lower plastic pressure relief area does not contact the battery cell, increasing the venting efficiency, but the contact effect with the battery cell is poor, increasing the probability of battery cell shaking, and also increasing the probability of the boss damaging the electrode sheets. Utility Model Content

[0004] The purpose of this invention is to provide a top cover assembly and a secondary battery to alleviate the technical problem that the probability of battery cell shaking increases when the top cover relies solely on protrusions to contact the battery cell.

[0005] This utility model provides a top cover assembly, including an insulating protective member, with first positioning protrusions respectively provided at both ends of the insulating protective member in a first direction; and two second positioning protrusions provided between the two first positioning protrusions, with the two second positioning protrusions located at both ends of the insulating protective member in a second direction.

[0006] A pressure relief valve is provided between the two second positioning protrusions, and two venting abutment protrusions are provided between the two second positioning protrusions. The two ends of the venting abutment protrusions are respectively connected to one of the second positioning protrusions, and the two venting abutment protrusions form a pressure relief area. The pressure relief valve is provided in the pressure relief area.

[0007] At least one first venting channel is provided on the venting abutment protrusion;

[0008] The first direction is the length direction of the insulating protective component, and the second direction is the width direction of the insulating protective component.

[0009] In an optional embodiment, the venting abutment protrusion is provided with at least one venting notch, which forms a second venting channel.

[0010] In an optional implementation, the first venting channel and the second venting channel are alternately arranged.

[0011] In an optional embodiment, a grid mesh is provided within the pressure relief zone.

[0012] In an optional embodiment, a top cover sheet body is also included, and the insulating protective member is disposed on the lower end surface of the top cover sheet body;

[0013] A first through hole is provided on the insulating protective component, and a second through hole corresponding to the first through hole is provided on the main body of the top cover plate;

[0014] An electrode body is provided on the top cover assembly. The electrode body is assembled in the first through hole and the second through hole, and one end of the electrode body extends from the upper end of the top cover assembly, and the other end extends from the lower end of the top cover assembly.

[0015] The insulating protective component of the top cover assembly provided by this utility model is provided with a second positioning protrusion, which can be used to abut against the battery cell assembly, and a venting abutment protrusion is provided between the two second positioning protrusions; the venting abutment protrusion can abut against the battery cell assembly, and a first venting channel is provided on the venting abutment protrusion; the venting abutment protrusion can prevent the battery cell assembly from shaking, and the first venting channel can be used for gas passage to ensure venting efficiency.

[0016] This utility model provides a secondary battery, including the top cover assembly described in any of the foregoing embodiments.

[0017] In an optional embodiment, it further includes a cell housing, a cell assembly, and a connecting piece; the cell housing has an upper opening, and the cell assembly is assembled inside the cell housing through the upper opening;

[0018] The top cover assembly is assembled at the upper opening, and the two pole bodies of the top cover assembly are respectively connected to the cell assembly via a connecting piece.

[0019] In an optional embodiment, the battery cell assembly includes two battery cells, and the battery cells are wound battery cells.

[0020] In an optional embodiment, the connecting piece includes a main connecting piece with two branch connecting pieces disposed on the main connecting piece; the main connecting piece is used to connect to the electrode body, and the two branch connecting pieces are respectively connected to the electrode tab of one of the battery cells.

[0021] In an optional embodiment, the second positioning protrusion is located between the two connecting pieces.

[0022] Compared with the prior art, the secondary battery provided by this utility model has the top cover assembly provided by this utility model, and thus has all the beneficial effects of the top cover assembly provided by this utility model. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art 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 from these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the top cover assembly provided in an embodiment of the present utility model;

[0025] Figure 2 for Figure 1 A partial enlarged view of component A of the top cover assembly shown;

[0026] Figure 3 Another structural schematic diagram of the top cover assembly provided in an embodiment of this utility model;

[0027] Figure 4 for Figure 3 A partial enlarged view of B of the top cover assembly shown;

[0028] Figure 5 This is a schematic diagram of the structure of a secondary battery provided in an embodiment of the present invention.

[0029] Icons: 100 - Insulation protection component; 200 - First positioning protrusion; 300 - Second positioning protrusion; 400 - Vent abutment protrusion; 500 - First venting channel; 600 - Grille mesh; 700 - Second venting channel; 800 - Top cover plate assembly; 900 - Cell assembly; 110 - Cell housing; 120 - Connecting piece. Detailed Implementation

[0030] The terms “first,” “second,” “third,” etc., are used only for distinguishing descriptions and do not indicate a sequence number, nor should they be interpreted as indicating or implying relative importance.

[0031] 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.

[0032] In the description of this application, it should be noted that the terms "inner", "outer", "left", "right", "upper", "lower", 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 application is in use. They are only for the convenience of describing this application 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 application.

[0033] In the description of this application, unless otherwise expressly specified and limited, the terms “set up,” “install,” “connect,” and “link” shall be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; as a mechanical connection or an electrical connection; as a direct connection or an indirect connection through an intermediate medium; or as a connection within two components.

[0034] The technical solution of this application will now be clearly and completely described with reference to the accompanying drawings.

[0035] Example

[0036] Reference Figures 1-4 This utility model provides a top cover assembly 800, including an insulating protective member 100, with first positioning protrusions 200 respectively provided at both ends of the insulating protective member 100 in a first direction; and two second positioning protrusions 300 provided between the two first positioning protrusions 200, with the two second positioning protrusions 300 located at both ends of the insulating protective member in a second direction.

[0037] A pressure relief valve is provided between the two second positioning protrusions 300, and two venting abutment protrusions 400 are provided between the two second positioning protrusions 300. The two ends of the venting abutment protrusions 400 are respectively connected to one of the second positioning protrusions 300, and the two venting abutment protrusions 400 form a pressure relief area. The pressure relief valve is provided in the pressure relief area.

[0038] At least one first venting channel 500 is provided on the venting abutment protrusion 400;

[0039] The first direction is the length direction of the insulating protective element 100, and the second direction is the width direction of the insulating protective element 100.

[0040] In some embodiments, the insulating protective member 100 of the top cover assembly 800 is provided with two first positioning protrusions 200, which are used to abut against the battery cell assembly 900, thereby fixing the two ends of the battery cell assembly 900 in a first direction; a second positioning protrusion 300 provided on the insulating protective member 100 can fix the middle position of the battery cell assembly 900; there is a gap between the two second positioning protrusions 300, and the two ends of the venting abutment protrusion 400 are respectively connected to one of the second positioning protrusions 300, and the venting abutment protrusion 400 can also abut against the battery cell assembly 900 to further fix the battery cell assembly 900; the venting abutment protrusion 400 is provided with a plurality of first venting channels 500 to avoid the venting abutment protrusion 400 affecting the flow of gas, that is, gas can flow into the pressure relief area through the first venting channels 500 to ensure the efficiency of venting.

[0041] Two venting abutment protrusions 400 and two second positioning protrusions 300 form a pressure relief zone. The pressure relief valve corresponds to the pressure relief zone. Gas enters the pressure relief zone through the first venting channel 500 to ensure smooth gas flow.

[0042] Reference Figure 3 and Figure 4 In an optional embodiment, the venting abutment protrusion 400 is provided with at least one venting notch, which forms a second venting channel 700.

[0043] In some embodiments, the venting abutment protrusion 400 is provided with a plurality of air guiding notches, which are evenly distributed on the venting abutment protrusion 400. This can increase the flow of gas on both sides of the venting abutment protrusion 400 and further ensure the efficiency of venting.

[0044] In an optional embodiment, the first venting channel 500 and the second venting channel 700 are alternately arranged.

[0045] In some embodiments, the venting abutment protrusion 400 has multiple venting notches, each venting notch forming a second venting channel 700, and the first venting channel 500 and the second venting channel 700 are alternately arranged; while fixing the battery cell assembly 900, the venting abutment protrusion 400 ensures venting efficiency by setting the first venting channel 500 and the second venting channel 700, and avoids affecting venting efficiency due to the setting of the venting abutment protrusion 400.

[0046] In an optional embodiment, a grid 600 is provided in the pressure relief zone.

[0047] A grid 600 is installed in the venting area. When the pressure relief valve is opened, the gas in the secondary battery needs to pass through the grid 600 before being discharged from the pressure relief valve. The grid 600 can act as a filter to prevent other substances in the secondary battery from being discharged from the pressure relief valve.

[0048] Gas entering through the first venting channel 500 and the second venting channel 700 needs to pass through the grid 600 before entering the pressure relief valve.

[0049] In an optional embodiment, a top cover sheet body is also included, and the insulating protective member 100 is disposed on the lower end surface of the top cover sheet body;

[0050] A first through hole is provided on the insulating protective component 100, and a second through hole corresponding to the first through hole is provided on the main body of the top cover plate;

[0051] An electrode body is provided on the top cover assembly 800. The electrode body is assembled in the first through hole and the second through hole, and one end of the electrode body extends from the upper end of the top cover assembly 800, and the other end extends from the lower end of the top cover assembly 800.

[0052] The insulating protective component 100 of the top cover assembly 800 provided by this utility model is provided with a second positioning protrusion 300, which can be used to abut against the battery cell assembly 900, and a venting abutment protrusion 400 is provided between the two second positioning protrusions 300; the venting abutment protrusion 400 can abut against the battery cell assembly 900, and a first venting channel 500 is provided on the venting abutment protrusion 400; the venting abutment protrusion 400 can prevent the battery cell assembly 900 from shaking, and the first venting channel 500 can be used for gas passage to ensure venting efficiency.

[0053] Reference Figure 5 This utility model provides a secondary battery, including the top cover assembly 800 described in any of the foregoing embodiments.

[0054] In an optional embodiment, it further includes a cell housing 110, a cell assembly 900, and a connecting piece 120; the cell housing 110 has an upper opening, and the cell assembly 900 is assembled into the cell housing 110 through the upper opening;

[0055] The top cover assembly 800 is assembled at the upper opening, and the two pole bodies of the top cover assembly 800 are respectively connected to the battery cell assembly 900 via a connecting piece 120.

[0056] In an optional embodiment, the cell assembly 900 includes two cells, and the cells are wound cells.

[0057] In an optional embodiment, the connecting piece 120 includes a main connecting piece with two branch connecting pieces disposed on the main connecting piece; the main connecting piece is used to connect to the electrode body, and the two branch connecting pieces are respectively connected to the electrode tab of one of the battery cells.

[0058] In an optional embodiment, the second positioning protrusion 300 is located between the two connecting pieces 120.

[0059] In some embodiments, the battery cell assembly 900 includes two battery cells. In order for one terminal body to be connected to the tabs of two battery cells at the same time, the main connecting piece of the connecting piece 120 is connected to the terminal body, and the branch connecting piece is connected to the tab; thus, one terminal body is connected to the tabs of two battery cells at the same time.

[0060] Two electrode bodies are provided on the top cover assembly 800. One electrode body is a positive electrode body and the other electrode body is a negative electrode body. The positive electrode body is connected to the positive electrode tabs of the two cells through the connecting piece 120, and the negative electrode body is connected to the negative electrode tabs of the two cells through the connecting piece 120.

[0061] The venting abutment protrusion 400 of the insulating protective component 100 is located between the two connecting pieces 120. The venting abutment protrusion 400 can physically isolate the two connecting pieces 120, and can effectively prevent the two connecting pieces 120 from connecting even if the secondary battery is deformed.

[0062] Compared with the prior art, the secondary battery provided by this utility model has the top cover assembly 800 provided by this utility model, and thus has all the beneficial effects of the top cover assembly 800 provided by this utility model.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A top cover assembly, characterized in that, The device includes an insulating protective member (100), with first positioning protrusions (200) respectively provided at both ends of the insulating protective member (100) in a first direction; and two second positioning protrusions (300) provided between the two first positioning protrusions (200), with the two second positioning protrusions (300) provided at both ends of the insulating protective member (100) in a second direction. A pressure relief valve is provided between the two second positioning protrusions (300), and two venting abutment protrusions (400) are provided between the two second positioning protrusions (300). The two ends of the venting abutment protrusions (400) are respectively connected to one of the second positioning protrusions (300), and the two venting abutment protrusions (400) form a pressure relief area. The pressure relief valve is provided in the pressure relief area. At least one first venting channel (500) is provided on the venting abutment protrusion (400); The first direction is the length direction of the insulating protective element (100), and the second direction is the width direction of the insulating protective element (100).

2. The top cover assembly according to claim 1, characterized in that, The venting abutment protrusion (400) is provided with at least one venting notch, which forms a second venting channel (700).

3. The top cover assembly according to claim 2, characterized in that, The first venting channel (500) and the second venting channel (700) are alternately arranged.

4. The top cover assembly according to claim 1, characterized in that, A grid mesh (600) is installed in the pressure relief zone.

5. The top cover assembly according to claim 1, characterized in that, It also includes a top cover sheet body, wherein the insulating protective element (100) is disposed on the lower end surface of the top cover sheet body; A first through hole is provided on the insulating protective component (100), and a second through hole corresponding to the first through hole is provided on the main body of the top cover plate; An electrode body is provided on the top cover assembly (800), the electrode body is assembled in the first through hole and the second through hole, and one end of the electrode body extends from the upper end of the top cover assembly (800) and the other end extends from the lower end of the top cover assembly (800).

6. A secondary battery, characterized in that, Includes the top cover assembly (800) as described in any one of claims 1-5.

7. The secondary battery according to claim 6, characterized in that, It also includes a cell housing (110), a cell assembly (900), and a connecting piece (120); the cell housing (110) has an upper opening, and the cell assembly (900) is assembled into the cell housing (110) through the upper opening; The top cover assembly (800) is assembled at the upper opening, and the two pole bodies of the top cover assembly (800) are respectively connected to the battery cell assembly (900) by a connecting piece (120).

8. The secondary battery according to claim 7, characterized in that, The battery cell assembly (900) includes two battery cells, and the battery cells are wound battery cells.

9. The secondary battery according to claim 8, characterized in that, The connecting piece (120) includes a main connecting piece, on which two branch connecting pieces are provided; the main connecting piece is used to connect with the electrode body, and the two branch connecting pieces are respectively connected to the electrode tab of one of the battery cells.

10. The secondary battery according to claim 9, characterized in that, The second positioning protrusion (300) is located between the two connecting pieces (120).

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