Over-current fusing structure capable of avoiding secondary contact and battery

Abstract

The utility model relates to the technical field of batteries, and discloses an over-current fusing structure for avoiding secondary contact and a battery, the over-current fusing structure for avoiding secondary contact comprises a connecting sheet which is electrically connected with a battery cell and a busbar, the connecting sheet is provided with a fusing part which is fused when the current exceeds a set value, and the fusing part is provided with an insulated fixing piece; when the battery is abnormal in the using process, such as over-charging or over-discharging, the current passing through the connecting piece is too large instantly, or when the current passing through the fusing part exceeds a set value in the using process of the battery, the fusing part is fused, so that the electrical connection between the battery core and the outside is cut off, and after the fusing part is fused, the battery can be quickly maintained and replaced, and meanwhile, the service life of the battery is prolonged. And after the fusing part is fused, the fixing piece arranged on the fusing part is used for connecting and fixing the connecting sheet, and the fixing piece is insulated, so that the secondary electrical connection contact of the battery cell is avoided, and greater harm is avoided, and the fused connecting sheet can be quickly disassembled and replaced.

Description

TECHNICAL FIELD

[0001] The utility model discloses a top cover assembly technical field, specifically, it relates to the overcurrent fuse structure and battery of avoiding secondary contact. BACKGROUND

[0002] The battery is widely used in new energy electric car, energy storage, mobile device and other related products, with the rise of new energy, the technology and demand of battery are rapidly increasing.

[0003] The battery has overcurrent fuse structure, when the battery appears abnormal in the use process, such as overcharge or overdischarge, the current through the overcurrent fuse structure is too large, when the current through the fuse part exceeds the set value in the use process of the battery, the overcurrent fuse structure will fuse, so that the battery and the external are disconnected electrically connected

[0004] In the prior art, when the overcurrent fuse structure appears the phenomenon of fusing, it is easy to make secondary contact with the external electrical components, thereby causing greater harm to the battery. Utility model content

[0005] The utility model discloses an overcurrent fuse structure and battery that avoid secondary contact, aiming at solving the problem that the overcurrent fuse structure is easy to make secondary contact with the external electrical components after fusing in the prior art.

[0006] The utility model discloses an overcurrent fuse structure and battery that avoid secondary contact, aiming at solving the problem that the overcurrent fuse structure is easy to make secondary contact with the external electrical components after fusing in the prior art.

[0007] Further, the fuse part is provided with a slotted area, which penetrates the connecting sheet along the thickness direction of the connecting sheet.

[0008] Further, the fuse part has a plurality of slotted areas.

[0009] Further, the plurality of slotted areas are arranged at intervals along the width direction of the connecting sheet.

[0010] Further, along the length direction of the connecting sheet, the side edge of the connecting sheet has a long side, one end of the slotted area penetrates the long side, and the other end is arranged offset from the long side.

[0011] Further, along the length direction of the connecting sheet, the side edge of the connecting sheet has a long side, one end of the slotted area penetrates the long side, and the other end is arranged offset from the long side.

[0012] Further, the fixing member fills the slotted area and is fixedly connected with the connecting sheet.

[0013] Furthermore, the fastener is made of insulating material and extends in a strip shape along the width direction of the connecting strip.

[0014] Furthermore, the connecting piece includes an inner connecting portion electrically connected to the battery cell and an outer connecting portion electrically connected to the busbar, and the fuse and fixing member are formed on the outer connecting portion.

[0015] Compared with the prior art, the overcurrent fuse structure provided by this utility model avoids secondary contact. When the battery malfunctions during use, such as overcharging or over-discharging, the current through the connecting piece becomes excessively large, or the current flowing through the fuse exceeds a set value during battery use. The fuse will then melt, disconnecting the battery cell from the outside electrical connection. After the fuse melts, the battery can be quickly repaired or replaced. At the same time, after the fuse melts, the fixing component on the fuse will connect and fix the connecting piece, and the fixing component is insulated, preventing the battery cell from making secondary electrical contact and causing greater damage. This also facilitates the quick disassembly and replacement of the melted connecting piece.

[0016] This invention also provides a battery, including the aforementioned overcurrent fuse structure to prevent secondary contact.

[0017] Compared with the prior art, the battery provided by this utility model has a fixing component that connects and fixes the connecting piece after the fuse part melts, avoiding secondary electrical connection contact of the battery cell and causing greater damage, so as to facilitate quick disassembly and replacement of the fuse-broken connecting piece. Attached Figure Description

[0018] Fig. 1 This is a three-dimensional schematic diagram of the overcurrent fuse structure that avoids secondary contact provided by this utility model;

[0019] Fig. 2 This is a three-dimensional schematic diagram of the connecting piece provided by this utility model;

[0020] Fig. 3 This is a three-dimensional schematic diagram of the connecting piece provided by this utility model;

[0021] In the figure: connecting piece 100, inner connecting part 101, slotted area 1011, long side 1012, connecting part 102, bending part 103; fastener 200. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] The implementation of this utility model will be described in detail below with reference to specific embodiments.

[0024] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0025] Reference Figs. 1-3 The image shown is a preferred embodiment of the present invention.

[0026] The overcurrent fuse structure that avoids secondary contact includes a connecting piece 100 electrically connected to the battery cell and busbar. The connecting piece 100 has a fuse portion that melts when the current exceeds a set value, and the fuse portion is provided with an insulating fastener 200.

[0027] The connecting piece 100 here can be a tab, which is electrically connected to the battery cell and extends out of the housing to be electrically connected to the busbar; or, the connecting piece 100 can be independent, which is electrically connected to the tab on the battery cell, thereby achieving electrical connection with the battery cell, and the connecting piece 100 extends out of the housing to be electrically connected to the busbar.

[0028] The overcurrent fuse structure provided above, which avoids secondary contact, will melt when the battery malfunctions during use, such as overcharging or over-discharging, causing the current through the connecting piece 100 to become excessively large, or when the current flowing through the fuse exceeds a set value. This will disconnect the battery cell from the outside electrical connection. After the fuse melts, the battery can be quickly repaired or replaced. At the same time, after the fuse melts, the fixing member 200 on the fuse will connect and fix the connecting piece 100, and the fixing member 200 is insulated to prevent the battery cell from making secondary electrical contact and causing greater damage. This also facilitates the quick disassembly and replacement of the melted connecting piece 100.

[0029] In this embodiment, the fuse section is provided with a slotted area 1011. Along the thickness direction of the connecting piece 100, the slotted area 1011 penetrates the connecting piece 100. By providing the slotted area 1011, the width or other dimensions of the fuse section can be shortened. When the current through the fuse section is too large, and the current flowing through the fuse section exceeds the set value, the fuse section can be melted and disconnected.

[0030] The fusible part has multiple slotted areas 1011, which allows multiple vacancies to be formed on the fusible part to reduce the width and other dimensions of the fusible part.

[0031] In this embodiment, multiple slotted areas 1011 are arranged at intervals along the width direction of the connecting piece 100. In this way, the multiple slotted areas 1011 can shorten the width of the fusible part, so as to achieve the purpose of fusing when the fusible part is subjected to excessive heat.

[0032] In this embodiment, along the length of the connecting piece 100, the side of the connecting piece 100 has a long side 1012, one end of the slotted area 1011 passes through the long side 1012, and the other end is arranged off-center from the long side 1012. Along this direction, the slotted area 1011 is formed by an inward recess of the long side 1012, which facilitates the formation and arrangement of the slotted area 1011.

[0033] Along the length of the connecting piece 100, the side of the connecting piece 100 has a long side 1012, and the slotted area 1011 is arranged off-center from the long side 1012. In this way, the slot is located inside the connection and is arranged off-center from the long side 1012.

[0034] In this embodiment, the fixing member 200 fills the slotted area 1011 and is fixedly connected to the connecting piece 100. In this way, when the fuse is melted, the battery cell is disconnected from the outside and the fixing member 200 is fixedly connected to the fuse, so as to avoid the phenomenon of secondary contact between the external electrical components and the battery cell, and the battery cell being electrically connected.

[0035] The fastener 200 is made of insulating material and extends in a strip shape along the width direction of the connecting strip. This ensures that the fastener 200 completely covers the slotted area 1011, and the fastener 200 can continue to connect and fix the fused part after the fused part melts.

[0036] The connecting piece 100 includes an inner connecting portion 102 electrically connected to the battery cell and an outer connecting portion 101 electrically connected to the busbar. A fuse and a fixing member 200 are formed on the outer connecting portion 101. The inner connecting portion 102 of the connecting piece 100 is electrically connected to the battery cell, the connecting piece 100 passes through the outer casing and is sealed and fixed to the outer casing, and the outer connecting portion 101 is formed on the outside of the outer casing and is used for connection to the busbar. The fuse is formed on the outer connecting portion 101, and when the fuse melts, it will not cause damage to the battery cell.

[0037] In this embodiment, the connecting piece 100 has a bending portion 103 in the middle. The bending portion 103 is connected to the inner connecting portion 102 and the outer connecting portion 101 respectively. The bending portion 103 is bent and arranged with the inner connecting portion 102 and the outer connecting portion 101. In this way, the connecting piece 100 can be arranged more stably.

[0038] This embodiment also provides a battery, including the overcurrent fuse structure described above that avoids secondary contact. When the fuse melts, the fixing member 200 connects and fixes the connecting piece 100 to prevent the battery cell from making secondary electrical contact and causing greater damage, so that the fuse-broken connecting piece 100 can be quickly disassembled and replaced.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An overcurrent fuse structure that avoids secondary contact, characterized in that, It includes a connecting piece that is electrically connected to the battery cell and the busbar, the connecting piece having a fuse portion that melts when the current exceeds a set value, and the fuse portion having an insulating fixing member.

2. The overcurrent fuse structure for avoiding secondary contact as described in claim 1, characterized in that, The fused portion has a slotted area that extends through the connecting piece along its thickness direction.

3. The overcurrent fuse structure for avoiding secondary contact as described in claim 2, characterized in that, The fused portion has multiple slotted areas.

4. The overcurrent fuse structure for avoiding secondary contact as described in claim 3, characterized in that, The multiple slotted areas are arranged at intervals along the width direction of the connecting piece.

5. The overcurrent fuse structure for avoiding secondary contact as described in claim 4, characterized in that, Along the length of the connecting piece, the side of the connecting piece has a long side, one end of the slotted area extends through the long side, and the other end is arranged off-center from the long side.

6. The overcurrent fuse structure for avoiding secondary contact as described in claim 4, characterized in that, Along the length of the connecting piece, the side of the connecting piece has a long side, and the slotted area is arranged off-center from the long side.

7. The overcurrent fuse structure for avoiding secondary contact as described in any one of claims 1 to 4, characterized in that, The fastener fills the slotted area and is fixedly connected to the connecting piece.

8. The overcurrent fuse structure for avoiding secondary contact as described in any one of claims 1 to 4, characterized in that, The fastener is made of insulating material and extends in a strip shape along the width of the connecting strip.

9. The overcurrent fuse structure for avoiding secondary contact as described in any one of claims 1 to 4, characterized in that, The connecting piece includes an inner connecting portion electrically connected to the battery cell and an outer connecting portion electrically connected to the busbar, and the fuse and fixing member are formed on the outer connecting portion.

10. A battery, characterized in that, Including the overcurrent fuse structure for avoiding secondary contact as described in any one of claims 1 to 9.

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