CN217589320U

CN217589320U - Switching piece and battery

Info

Publication number: CN217589320U
Application number: CN202221464110.XU
Authority: CN
Inventors: 周宇; 陈贤阳; 孙飞
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2022-06-13
Filing date: 2022-06-13
Publication date: 2022-10-14
Anticipated expiration: 2032-06-13

Abstract

The utility model belongs to the technical field of the battery, a switching piece and a battery are disclosed, the switching piece comprises a switching piece main body and a thermistor, the switching piece main body comprises a pole connecting piece, a pole lug connecting piece and two fuse pieces arranged between the pole connecting piece and the pole lug connecting piece, and fuse holes are formed among the pole connecting piece, the pole lug connecting piece and the fuse pieces; the thermistor is arranged in the fusing hole, and the outer peripheral side of the thermistor is attached to the inner side wall of the fusing hole. The utility model provides a switching piece and battery, thermistor set up in by utmost point post connection piece, utmost point ear connection piece and fuse link between the fusing hole that forms, and thermistor's periphery side and fusing hole's inside wall laminating set up, when the battery that has this switching piece takes place outer short circuit, thermistor resistance sharply increases, makes the electric current sharply increase in the fuse link, and fuse link overcurrent area is little, and then makes the normal fusing of fuse link, effectively improves the security performance of battery.

Description

Switching piece and battery

Technical Field

The utility model relates to a battery technology field especially relates to a switching piece and battery.

Background

With the development of new energy battery industry at home and abroad, the requirements of the energy storage and new energy automobile industry on batteries are continuously increased. While various enterprises pursue high energy density batteries, great attention has been paid to the safety of the batteries.

At present, the safety design of a single battery mainly comprises a pole overturning plate device (OSD), a current cutoff structure (CID) and a short circuit fusing structure (Fuse), wherein all the three safety structures can be designed on a top cover assembly, but the top cover assembly comprising the safety structures is generally complex in structure and high in processing and manufacturing cost.

Among the prior art, generally with short circuit fuse-link mechanism design on the anodal switching of battery, set up the fusing zone on the switching piece promptly, the overcurrent area in fusing zone is little, and when taking place outside short circuit, short-circuit current produces a large amount of heats in the fusing area of switching piece, makes the fusing zone fusing disconnection of connection piece, and then makes the circuit disconnection can not continuously produce the heat and catch fire in order to guarantee electric core, improves the security performance of single battery. However, when the open fuse hole reduces the flow area, the internal resistance of the battery is increased, and the performance of the battery in normal use is affected.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a switching piece can guarantee that the battery normally fuses when taking place outer short circuit, and can not increase the internal resistance of battery when normally using.

To achieve the purpose, the utility model adopts the following technical proposal:

an interposer, comprising:

the adapter plate comprises an adapter plate body, a fixing piece and a fixing piece, wherein the adapter plate body comprises a pole connecting plate, a pole lug connecting plate and two fuse links arranged between the pole connecting plate and the pole lug connecting plate, and fuse holes are formed among the pole connecting plate, the pole lug connecting plate and the fuse links;

and the thermistor is arranged in the fusing hole, and the outer peripheral side of the thermistor is attached to the inner side wall of the fusing hole.

Optionally, two opposite edges at two ends of the thermistor all extend outwards to be provided with first supporting plates, and two of the same end are formed with a first fixing clamp between the first supporting plates, the medial surface of the first fixing clamp all with the fuse link laminating setting is in order to fix the thermistor.

Optionally, both side surfaces of the fuse link are lower than both side surfaces of the pole connecting sheet and the pole lug connecting sheet to form a first sinking groove, and the first support plate is arranged in the first sinking groove.

Optionally, the thermistor is provided with second supporting plates towards two opposite edges of the side face of the tab connecting piece in an outward extending mode, a second fixing clamp is formed between the second supporting plates, and the inner side face of the second fixing clamp is attached to the tab connecting piece to fix the thermistor.

Optionally, both sides of the tab connecting piece are provided with second sinking grooves, and the second supporting plate is arranged in the second sinking grooves.

Optionally, the tab connector further comprises an auxiliary lug arranged on one side of the tab connecting piece, and an insertion groove is formed between the auxiliary lug and the tab connecting piece.

Optionally, the fusing hole is long, and the fusing hole extends along the width direction of the interposer body.

Optionally, the tab connecting piece faces away from one side edge of the pole connecting piece and is provided with a plurality of tab connecting portions at intervals in the width direction of the adapter piece main body.

Optionally, a plurality of concave points are arranged on the pole connecting piece.

Another object of the present invention is to provide a battery, including the above-mentioned adapter plate.

The utility model has the advantages that:

the utility model provides a switching piece and battery, thermistor set up in by utmost point post connection piece, utmost point ear connection piece and fuse link between the fusing hole that forms, and thermistor's periphery side and fusing hole's inside wall laminating set up, when the battery that has this switching piece takes place outer short circuit, thermistor resistance sharply increases, makes the electric current sharply increase in the fuse link, and fuse link overcurrent area is little, and then makes the normal fusing of fuse link, effectively improves the security performance of battery. In addition, when the battery is normally used, the thermistor can not increase the internal resistance of the battery, and can conduct current for the tab connecting sheet and the pole connecting sheet together with the fuse link sheet, so that the electrical property of the battery is effectively improved.

Drawings

Fig. 1 is an exploded view of an interposer according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an interposer according to a first embodiment of the present invention;

fig. 3 is a schematic structural diagram of an interposer main body according to a first embodiment of the present invention;

fig. 4 is a cross-sectional view of an interposer according to an embodiment of the present invention;

fig. 5 is an enlarged schematic view of a point a in fig. 4 according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a thermistor according to an embodiment of the present invention;

fig. 7 is an exploded view of an interposer according to a second embodiment of the present invention;

fig. 8 is a schematic structural diagram of an interposer according to a second embodiment of the present invention.

In the figure:

100. connecting the pole column with a connecting sheet; 110. concave points; 200. a tab connecting sheet; 210. a tab connecting part; 300. a fuse link; 400. a fuse hole; 500. a thermistor; 510. a first support plate; 520. a second support plate; 610. a first sink tank; 620. a second sink tank; 700. auxiliary soldering lugs; 710. ultrasonic welding and printing; 800. and (4) inserting grooves.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", and the like are used based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and simplification of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Example one

The embodiment provides a battery, which comprises an adapter sheet, and as shown in fig. 1 to 3, the adapter sheet comprises an adapter sheet main body and a thermistor 500, the adapter sheet main body comprises a pole connecting sheet 100, a pole connecting sheet 200 and two fuse links 300 arranged between the pole connecting sheet 100 and the pole connecting sheet 200, and fuse holes 400 are formed among the pole connecting sheet 100, the pole connecting sheet 200 and the fuse links 300; the thermistor 500 is disposed in the fuse hole 400, and an outer circumferential side of the thermistor 500 is attached to an inner wall of the fuse hole 400.

In this embodiment, the thermistor 500 is disposed in the fuse hole 400 formed between the terminal connecting sheet 100, the tab connecting sheet 200 and the fuse piece 300, and the outer peripheral side of the thermistor 500 is attached to the inner side wall of the fuse hole 400, so that when the battery having the adapter sheet is short-circuited externally, the resistance of the thermistor 500 is increased sharply, the current in the fuse piece 300 is increased sharply, the overcurrent area of the fuse piece 300 is small, the fuse piece 300 is normally fused, and the safety performance of the battery is effectively improved. In addition, when the battery is normally used, the thermistor 500 does not increase the internal resistance of the battery, and can conduct current for the tab connecting sheet 200 and the post connecting sheet 100 together with the fuse link 300, so that the electrical property of the battery is effectively improved.

Specifically, the post connection tab 100, the tab connection tab 200, and the fuse tab 300 are integrally formed. Furthermore, the adaptor plate main body can be composed of single-layer or multi-layer metal sheets, and the metal sheets are fixedly connected with each other.

Furthermore, the metal sheet is made of nickel, copper nickel plating or copper nickel, nickel aluminum composite material. Of course, the material of the metal sheet may be other metal materials, and is not limited herein.

Further, when the interposer body is composed of multiple layers of metal sheets, the metal sheets may be made of the same material or different materials, and are not limited herein.

Specifically, the terminal connecting sheet 100 is used for electrically connecting with a terminal of the battery top cover assembly, and the tab connecting sheet 200 is used for electrically connecting with a battery cell tab.

Further, a plurality of concave points 110 are disposed on the pole connecting sheet 100. So that the connection of the terminal connecting piece 100 and the terminal of the battery top cover assembly is more stable.

Further, the pits 110 are arranged in a matrix on the post connecting sheet 100.

Specifically, fuse hole 400 is rectangular form, and fuse hole 400 extends along the width direction of adapter plate main part and sets up to reduce fuse-link 300's width, and then reduce fuse-link 300's cross-sectional area, when the interior electric current of fuse-link 300 sharply increases, can make fuse-link 300 melt fast.

In this embodiment, referring to fig. 4 to 5, the adaptor sheet further includes an auxiliary tab 700 disposed at one side of the tab connection sheet 200, and an insertion groove 800 is formed between the auxiliary tab 700 and the tab connection sheet 200. In this embodiment, the battery core tab can be inserted into the insertion groove 800 formed between the auxiliary soldering lug 700 and the tab connecting piece 200 and fixed in an ultrasonic welding mode, and the battery core tab and the ultrasonic welding head are separated by the auxiliary soldering lug 700, so that the ultrasonic welding head can not damage the battery core tab during ultrasonic welding of the battery core tab and the tab connecting piece 200.

Specifically, the auxiliary lug 700 and the tab connection piece 200 are fixed by ultrasonic welding. Further, the ultrasonic welding mark 710 is disposed in the middle of the tab connecting piece 200 to avoid obstructing the battery cell tab from being inserted into the insertion groove 800 formed between the tab connecting piece 200 and the auxiliary welding piece 700.

Further, a plurality of tab connection portions 210 are disposed at intervals along the width direction of the adaptor piece main body at an edge of the tab connection piece 200 opposite to the pole connection piece 100, so that the tab connection piece 200 can be electrically connected to a plurality of battery cell tabs. In the present embodiment, the cell tab is welded to the tab connecting piece 200 at the tab connecting portion 210. Specifically, the tab connection piece 200 is provided with 2-8 tab connection parts 210. Preferably, the tab connection piece 200 is provided with 2, 3, 5 or 6 tab connection parts 210. When the tab connection piece 200 is provided with 2 tab connection portions 210, the shape of the auxiliary tab 700 is H-shaped, which facilitates bending the auxiliary tab 700, and further facilitates inserting a battery cell tab between the tab connection piece 200 and the auxiliary tab 700.

In this embodiment, referring to fig. 6, two opposite edges of two ends of the thermistor 500 are respectively provided with a first supporting plate 510 extending outwards, a first fixing clip is formed between the two first supporting plates 510 at the same end, and inner side surfaces of the first fixing clip are respectively attached to the fuse link 300 to fix the thermistor 500. In this embodiment, the thermistor 500 is fixed by clamping the fuse link 300 with the first fixing clamp formed by the two first supporting plates 510, and the structure is simple, so that the thermistor 500 can be effectively ensured to be stably fixed and cannot be easily separated from the interposer body. Preferably, the first support plate 510 is made of an insulating material.

Further, as shown in fig. 3, both side surfaces of the fuse link 300 are lower than both side surfaces of the

tab terminal

100 and 200 to form first sinking grooves 610, and the first support plate 510 is placed in the first sinking grooves 610. In this embodiment, the design of the first sinking groove 610 can limit the position of the first supporting plate 510 relative to the interposer body, thereby limiting the position of the thermistor 500, so that the thermistor 500 is more stably placed in the fuse hole 400. In addition, when the battery cell tab is welded with the tab connection piece 200, the battery cell tab may pass through the insertion groove 800 formed between the tab connection piece 200 and the auxiliary connection piece 700 and be placed at the position of the first support plate 510, the design of the first deposition groove 610 enables the outer side surface of the first support plate 510 to coincide with the surface of the adapter piece main body, or the outer side surface of the first support plate 510 to be lower than the surface of the adapter piece main body, thereby avoiding the battery cell tab from interfering when being inserted into the auxiliary connection piece 700 and the tab connection piece 200, and causing damage to the battery cell tab and influencing the welding quality.

Example two

The structure of the thermistor 500 in the interposer provided in this embodiment is different from that of the first embodiment, specifically, as shown in fig. 7 to 8, two edges of the thermistor 500 opposite to the side surface of the tab connection piece 200 are both provided with a second support plate 520 extending outward, a second fixing clip is formed between the two second support plates 520, and the inner side surface of the second fixing clip is both attached to the tab connection piece 200 to fix the thermistor 500. In this embodiment, the thermistor 500 is fixed by clamping the tab connecting piece 200 by the second fixing clip formed by the two second supporting plates 520, and the structure is simple, so that the thermistor 500 can be effectively ensured to be stably fixed and cannot be easily separated from the adaptor body. Preferably, the second supporting plate 520 is made of an insulating material.

Further, the edge of the auxiliary lug 700 facing the pole connecting piece 100 may be disposed above the second support plate 520, and the auxiliary lug 700 may be disposed at a distance from the second support plate 520, which is not limited herein.

Further, both side surfaces of the tab connection piece 200 are provided with second sinking grooves 620, and the second support plate 520 is disposed in the second sinking grooves 620. In this embodiment, the second sinking groove 620 is designed to limit the position of the second supporting plate 520 relative to the interposer body, so as to limit the position of the thermistor 500, and the thermistor 500 is more stably placed in the fuse hole 400. In addition, when the auxiliary lug 700 is welded to the tab connection piece 200, the design of the second sinking groove 620 can effectively prevent the auxiliary lug 700 from interfering with the second support plate 520, which affects the welding precision of the auxiliary lug 700 and the tab connection piece 200.

Compared with the first embodiment, when the battery is in an external short circuit, the resistance of the thermistor 500 is sharply increased, so that the current in the fuse link 300 is sharply increased, and after the fuse link 300 is normally fused, the second fixing clamp keeps clamping the tab connecting piece 200, the thermistor 500 can be effectively prevented from falling between the tab connecting piece 100 and the tab connecting piece 200, and the safety performance of the battery is effectively improved.

Other structures of the interposer provided in this embodiment are the same as those of the first embodiment, and are not described in detail herein.

Of course, the fixing manner of the thermistor 500 to the fuse hole 400 is not limited to the solution of the first embodiment and the second embodiment, and is not limited herein.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An interposer, comprising:

the adapter plate comprises an adapter plate body, wherein the adapter plate body comprises a pole connecting plate (100), a pole lug connecting plate (200) and two fuse plates (300) arranged between the pole connecting plate (100) and the pole lug connecting plate (200), and fuse holes (400) are formed among the pole connecting plate (100), the pole lug connecting plate (200) and the fuse plates (300);

and the thermistor (500) is arranged in the fusing hole (400), and the outer peripheral side of the thermistor (500) is attached to the inner side wall of the fusing hole (400).

2. The interposer as claimed in claim 1, wherein two opposite edges of the thermistor (500) are respectively provided with a first support plate (510) extending outwards, a first fixing clip is formed between the two first support plates (510) at the same end, and inner side surfaces of the first fixing clips are respectively attached to the fuse link (300) to fix the thermistor (500).

3. The interposer as recited in claim 2, wherein both side surfaces of the fuse link (300) are lower than both side surfaces of the pole connecting sheet (100) and the pole connecting sheet (200) to form a first sink groove (610), and the first support plate (510) is disposed in the first sink groove (610).

4. The adapter plate according to claim 1, wherein two opposite edges of the thermistor (500) facing the side of the tab connecting plate (200) are provided with second supporting plates (520) in an outward extending manner, a second fixing clamp is formed between the two second supporting plates (520), and the inner side surfaces of the second fixing clamps are attached to the tab connecting plate (200) to fix the thermistor (500).

5. The interposer as recited in claim 4, wherein the tab connection piece (200) is provided with second recesses (620) on both sides thereof, and the second support plate (520) is disposed in the second recesses (620).

6. The interposer as recited in claim 1, further comprising an auxiliary tab (700) disposed on one side of the tab connection piece (200), wherein an insertion groove (800) is formed between the auxiliary tab (700) and the tab connection piece (200).

7. The interposer as recited in claim 1, wherein the fuse hole (400) is elongated, and the fuse hole (400) extends along a width direction of the interposer body.

8. The interposer as recited in claim 1, wherein a plurality of tab connection portions (210) are provided at intervals along a width direction of the interposer body at an edge of the tab connection sheet (200) facing away from the post connection sheet (100).

9. The interposer as recited in claim 1, wherein the post connection tab (100) is provided with a plurality of concave points (110).

10. A battery comprising the interposer as recited in any one of claims 1 to 9.