Adapter piece and lithium ion battery

Abstract

The utility model relates to the technical field of lithium batteries, and provides an adapter sheet and a lithium ion battery, the adapter sheet comprises an adapter sheet body and a connecting bridge, the adapter sheet body is provided with a groove; the connecting bridge penetrates through the groove, and the two ends of the connecting bridge are connected with the switching piece body; a through hole is formed in the connecting bridge and corresponds to a liquid injection hole of the battery. The grooves are formed in the adapter piece body, and the connecting bridges penetrate through the grooves, so that when electrolyte is injected, the connecting bridges can buffer the electrolyte, and the electrolyte is prevented from impacting the roll core; therefore, the connection bridge not only realizes the connection work of the battery pole and the roll core tab, but also realizes the buffering of the electrolyte, does not occupy too much internal space of the battery, and is beneficial to ensuring the energy density of the battery.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of lithium battery, especially to a switching piece and lithium ion battery. BACKGROUND

[0002] Lithium ion battery is a kind of battery that is widely used, and electrolyte needs to be injected into the inside of the battery; in order to prevent electrolyte from impacting the winding core when injecting, a boss is arranged at the lower end of the battery top cover, and a protective cover is designed at the lower end of the boss of the top cover lower plastic part, and a cutout is formed around the protective cover for guiding electrolyte and dispersing the impact of electrolyte on the internal tab of the winding core when injecting; but this structure will occupy the internal space of the battery, affecting the energy density of the battery.

[0003] The utility model with the authorization announcement number CN218300154U discloses a switching piece and power battery. The switching piece includes a tab connecting part, a pole connecting part and a fuse part. The tab connecting part is used to connect the tab inside the battery cell. The pole connecting part is used to connect the pole. The fuse part is arranged between the tab connecting part and the pole connecting part. A plurality of heat dissipation holes are arranged on the fuse part along the width direction of the fuse part. The heat dissipation holes are arranged in a non-linear manner.

[0004] As in the above-mentioned scheme, the switching piece in the current battery is mainly used to connect the winding core tab and the battery pole. Some switching pieces have elasticity or are provided with a fuse structure to realize the buffering and circuit fuse protection functions. Since the switching piece is located between the battery pole and the winding core, and the electrolyte injection hole is located on one side of the pole, it is a feasible structure to use the switching piece as a buffering structure to avoid the impact of electrolyte on the winding core. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model provides a switching piece and lithium ion battery capable of realizing electrolyte buffering to solve the problem that the existing electrolyte buffering structure occupies the internal space of the battery and affects the energy density of the battery.

[0006] The technical scheme of the utility model is as follows:

[0007] On the one hand, the utility model provides a switching piece, which comprises a switching piece body and a connecting bridge, wherein,

[0008] The switching piece body is provided with a groove;

[0009] The connecting bridge penetrates through the groove, and both ends of the connecting bridge are connected with the switching piece body;

[0010] A through hole is formed in the connecting bridge, and the through hole is used to correspond to the electrolyte injection hole of the battery.

[0011] On the basis of the above technical scheme, preferably, the groove is divided into an inner groove and an outer groove by the connecting bridge, and a fuse groove is formed in the adapter piece body,

[0012] An inner groove is provided with a fuse groove on each side,

[0013] The adapter piece body is divided by the inner groove and the fuse groove, and is provided with a connecting core lug on one side of the connecting bridge and a battery pole on the other side.

[0014] On the basis of the above technical scheme, preferably, the inner groove is in a semicircular structure, and a straight line side of the inner groove corresponds to the connecting bridge.

[0015] On the basis of the above technical scheme, preferably, the adapter piece body comprises a first connecting part for connecting the core lug and a second connecting part for connecting the battery pole,

[0016] The first connecting part and the second connecting part are connected to each other, and the groove and the fuse groove are both formed in the first connecting part.

[0017] On the basis of the above technical scheme, preferably, the second connecting part is protrudingly arranged on one side of the first connecting part, and the corners of the first connecting part and the second connecting part are both rounded.

[0018] On the basis of the above technical scheme, preferably, the first connecting part and the second connecting part are both in a rectangular sheet structure, and the connecting part of the first connecting part and the second connecting part forms two concave corners.

[0019] One end of the fuse groove corresponds to a right angle of the first connecting part, and the other end corresponds to an arc-shaped side of the inner groove.

[0020] On the basis of the above technical scheme, preferably, a pattern is pressed on the second connecting part.

[0021] On the basis of the above technical scheme, preferably, the adapter piece body and the connecting bridge are in an integrated structure, and the material of the adapter piece body and the connecting bridge is one of aluminum, copper or nickel.

[0022] On the basis of the above technical scheme, preferably, the material of the adapter piece body and the connecting bridge is a composite material of multiple kinds of aluminum, copper and nickel.

[0023] On the other hand, the utility model provides a kind of lithium ion battery, including the adapter piece described above.

[0024] The adapter piece and the lithium ion battery of the utility model have the following beneficial effects relative to prior art:

[0025] (1) by setting recess on the adapter piece body, and setting with the bridge through the recess, so in the electrolyte injection, the bridge will buffer the electrolyte, so as to avoid the electrolyte impact the core; so, the bridge realizes the connection of the battery pole and the core tab, and also realizes the buffer of the electrolyte, which does not occupy too much internal space of the battery, and is conducive to guarantee the energy density of the battery;

[0026] (2) the adapter piece body is provided with a fuse slot, and the inner slot is provided in a semicircular structure, so that the fuse slot can be arranged corresponding to the arc-shaped edge of the inner slot, which is conducive to compressing the width of the adapter piece, thereby reducing the volume and weight, and realizing the overcurrent fuse function to ensure the application safety;

[0027] (3) the adapter piece body has a unique overall structure design, which can effectively avoid the risk of mixing materials in the production process. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0029] Figure 1 is a structural diagram of the adapter piece of the present application;

[0030] Figure 2 is another structural diagram of the adapter piece of the present application;

[0031] In the figure: 1, adapter piece body; 11, first connecting part; 12, second connecting part; 101, recess; 1011, inner slot; 1012, outer slot; 102, fuse slot; 103, reentrant corner; 2, bridge; 201, through hole. DETAILED DESCRIPTION

[0032] The technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0033] As shown in Figures 1-2 The adapter piece of the present application comprises an adapter piece body 1 and a bridge 2.

[0034] The utility model discloses a lithium ion battery, including the above-mentioned adapter piece, it still includes the roll core and the tab.

[0035] Specifically, the battery core can be set as a roll core, and can also be a stack core.

[0036] As Figure 1 The adapter piece body 1 is provided with a groove 101; the connecting bridge 2 passes through the groove 101, and the two ends of the connecting bridge 2 are connected with the adapter piece body 1; the connecting bridge 2 is provided with a through hole 201, and the through hole 201 is used for corresponding to the liquid injection hole of the battery.

[0037] As the above structure, the connecting bridge 2 passes through the groove 101, and the two ends are connected with the adapter piece body 1, after the adapter piece body 1 is connected with the roll core tab and the battery pole, the connecting bridge 2 corresponds to the liquid injection hole on the battery shell, so that after the electrolyte is injected, it will be blocked by the connecting bridge 2, and the buffering effect is realized, so as to avoid damage caused by flushing the roll core;

[0038] Meanwhile, the connecting bridge 2 is provided with a through hole 201, which is beneficial to the immersion of the electrolyte.

[0039] As Figure 1 And Figure 2 The through hole 201 can be provided as a circular hole or a strip-shaped hole.

[0040] As Figure 1 The groove 101 is divided into an inner groove 1011 and an outer groove 1012 by the connecting bridge 2, and the adapter piece body 1 is provided with a fuse groove 102, wherein the two sides of the inner groove 1011 are each provided with a fuse groove 102; the adapter piece body 1 is divided by the inner groove 1011 and the fuse groove 102, and is arranged on one side of the connecting bridge 2 for connecting the roll core tab, and is arranged on the other side for connecting the battery pole.

[0041] As the above structure, the groove 101 is divided into an inner groove 1011 and an outer groove 1012 by the connecting bridge 2, which is also used for the immersion of the electrolyte;

[0042] The fuse groove 102 is arranged corresponding to the inner groove 1011, and the two sides of the adapter piece body 1 are respectively used for connecting the battery pole and the roll core tab, so that when the overcurrent problem occurs, the part of the adapter piece body 1 on both sides of the fuse groove 102 will be fused, thereby playing the role of overcurrent protection, and avoiding the explosion of the battery.

[0043] Further, the inner groove 1011 is in a semicircular structure, and the straight edge of the inner groove 1011 corresponds to the connecting bridge 2.

[0044] As the above structure, the inner groove 1011 is provided as a semicircular structure, so that the fuse groove 102 can be arranged corresponding to the arc-shaped edge of the inner groove 1011, which is beneficial to compressing the width of the adapter piece, thereby reducing the volume and weight.

[0045] As Figure 1 shown, the adapter piece body 1 includes a first connecting part 11 for connecting the core tab, and a second connecting part 12 for connecting the battery pole, wherein the first connecting part 11 and the second connecting part 12 are connected to each other, and the groove 101 and the fuse groove 102 are both arranged on the first connecting part 11.

[0046] As the above structure, the first connecting part 11 of the adapter piece body 1 is used to connect the core tab, and is used to arrange the groove 101 and the fuse groove 102;

[0047] The second connecting part 12 is used to connect the battery pole.

[0048] As Figure 1 shown, the second connecting part 12 is protrudingly arranged on one side of the first connecting part 11, and the corners of the first connecting part 11 and the second connecting part 12 are both arranged as rounded corners;

[0049] As the above structure, the second connecting part 12 is protrudingly arranged on one side of the first connecting part 11, and the corners of the first connecting part 11 and the second connecting part 12 are both arranged as rounded corners;

[0050] Of course, the structure of the adapter piece body can be changed according to the specific application scenario;

[0051] In order to avoid scratching the components during assembly, the corners of the first connecting part 11 and the second connecting part 12 are arranged as rounded corners.

[0052] As Figure 1 shown, the first connecting part 11 and the second connecting part 12 are both in a rectangular sheet structure, and the connecting part of the first connecting part 11 and the second connecting part 12 forms two concave corners 103; one end of the fuse groove 102 corresponds to the right angle of the first connecting part 11, and the other end corresponds to the arc edge of the inner groove 1011;

[0053] As the above structure, the first connecting part 11 and the second connecting part 12 are arranged as a rectangular sheet structure, and since the area of the first connecting part 11 is small, the concave corners 103 are formed, which is beneficial to reduce the weight of the adapter piece, improve the energy density of the battery, and reduce the application cost;

[0054] In this way, when the fuse groove 102 is arranged, one end thereof corresponds to the right angle of the first connecting part 11, and the other end corresponds to the arc edge of the inner groove 1011, which fully utilizes the area of the adapter piece body 1 and also ensures the overcurrent capacity between the battery pole and the core tab.

[0055] Further, in order to facilitate welding, the first connecting part 11 is pressed with a pattern, so that the first connecting part 11 can be firmly welded with the battery pole.

[0056] Specifically, the adapter piece body 1 and the connecting bridge 2 are of an integrated structure, and the material of the adapter piece body 1 and the connecting bridge 2 is one of aluminum, copper or nickel;

[0057] In some embodiments, the material of the adapter piece body 1 and the connecting bridge 2 is a composite material of multiple of aluminum, copper and nickel;

[0058] As the above structure, the material of the adapter piece body 1 and the connecting bridge 2 corresponds to the material of the battery pole.

[0059] Specific implementation steps are as follows:

[0060] The first connecting part 11 of the adapter piece body 1 is welded with the winding core tab, the second connecting part 12 is welded with the battery pole, and the connecting bridge 2 corresponds to the liquid injection hole of the battery, so that when the electrolyte is injected, the electrolyte is buffered and dispersed through the connecting bridge 2, and the dispersed electrolyte is immersed into the battery winding core through the through hole 201 and the groove 101;

[0061] When overcurrent occurs, the temperature rises, the adapter piece body 1 is fused from the fuse groove 102, the electrical connection is disconnected, and the battery continues to heat up to cause explosion.

[0062] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An adapter plate, characterized by: The adapter plate body (1) and the connecting bridge (2) are provided, wherein, The adapter plate body (1) is provided with a groove (101); The connecting bridge (2) passes through the groove (101), and both ends of the connecting bridge (2) are connected with the adapter plate body (1); A through hole (201) is provided on the connecting bridge (2), and the through hole (201) is used for corresponding to the liquid injection hole of the battery.

2. The adapter plate of claim 1, wherein: The groove (101) is divided into an inner groove (1011) and an outer groove (1012) by the connecting bridge (2), and the adapter plate body (1) is provided with a fuse groove (102) as a boundary line, The inner groove (1011) is provided with one fuse groove (102) on each side; The adapter plate body (1) is provided with a first connecting part (11) for connecting the core tab on one side of the connecting bridge (2) and a second connecting part (12) for connecting the battery pole on the other side.

3. The adapter plate of claim 2, wherein: The inner groove (1011) is in a semicircular structure, and the straight line side of the inner groove (1011) corresponds to the connecting bridge (2).

4. The adapter plate of claim 3, wherein: The adapter plate body (1) comprises a first connecting part (11) for connecting the core tab and a second connecting part (12) for connecting the battery pole, wherein, The first connecting part (11) and the second connecting part (12) are connected with each other, and the groove (101) and the fuse groove (102) are provided on the first connecting part (11).

5. The adapter plate of claim 4, wherein: The second connecting part (12) is provided on one side of the first connecting part (11), and the corners of the first connecting part (11) and the second connecting part (12) are all provided as round corners.

6. The adapter plate of claim 5, wherein: The first connecting part (11) and the second connecting part (12) are both in a rectangular sheet structure, and the connection part of the first connecting part (11) and the second connecting part (12) forms two concave corners (103). One end of the fuse groove (102) corresponds to the right angle of the first connecting part (11), and the other end corresponds to the arc side of the inner groove (1011).

7. The adapter plate of any one of claims 4 to 6, wherein: The second connecting part (12) is provided with a pattern.

8. The adapter plate of any one of claims 1 to 6, wherein: The adapter plate body (1) and the connecting bridge (2) are in an integrated structure, and the material of the adapter plate body (1) and the connecting bridge (2) is one of aluminum, copper or nickel.

9. The adapter of any one of claims 1 to 6, wherein: The material of the adapter plate body (1) and the connecting bridge (2) is a composite material of aluminum, copper and nickel.

10. A lithium-ion battery, characterized by: The adapter plate comprises the adapter plate as claimed in any one of claims 1-9.

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