Battery structure and electric equipment

Abstract

The utility model relates to the technical field of battery structures, and discloses a battery structure and electric equipment, the battery structure comprises a shell, the top of the shell is provided with a cap, and a sealing ring is arranged between the cap and the shell; a first current collecting plate, a second current collecting plate and a battery cell are arranged in the shell, the first current collecting plate and the second current collecting plate are arranged at the top and the bottom of the battery cell respectively, and the first current collecting plate is located between the cap and the battery cell; the edge of the first collector plate extends to form a bent part, the bent part extends to form a connecting part, the connecting part is located between the cap and the first collector plate through the bent part, and the connecting part is connected with the face, located on the inner side of the shell, of the cap. According to the scheme, the first current collecting disc and the connecting part connected with the cap are made into the integrated structure, the first current collecting disc can be directly connected with the cap through the connecting part connected with the bent part, and the structure that a connecting piece is additionally arranged between a conventional cap and the current collecting disc is simplified; a hole is formed in the first flow collecting disc for liquid injection, and a hole can also be formed in the connecting part for liquid injection at the same time.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery structure technical field especially relates to a battery structure and electrical equipment. BACKGROUND

[0002] When the lithium ion battery charges, the voltage applied from outside makes lithium ion in the positive electrode deintercalate, passes through the diaphragm to flow to and intercalate the negative electrode through the electrolyte, and at the same time, in order to keep the electric neutrality, the positive electrode electron also flows to the negative electrode through the external circuit; when discharging, lithium ion deintercalates from the negative electrode, passes through the diaphragm to flow to and intercalate the positive electrode through the electrolyte, and the negative electrode electron also flows to the positive electrode through the external circuit.

[0003] Chinese patent CN202222182539.6 discloses a cap and battery, the cap includes an explosion-proof piece, a current collector disc and an adapter plate between the explosion-proof piece and the current collector disc; wherein the explosion-proof piece and the current collector disc are connected with each other; the adapter plate includes a first connecting disc and a second connecting disc connected with each other; the current collector disc and the first connecting disc are connected with each other. The cap of the utility model is not easy to produce problems such as blind hole welding, welding fire and welding instability when welding with the tab, can improve the yield of the battery, reduce the manufacturing cost and improve the benefit. The battery structure needs to be improved.

[0004] The utility model overcomes the shortcomings of prior art, provides a battery structure and electrical equipment, simplifies the relevant structure of battery top cap, and is convenient for production and manufacturing. INVENTION CONTENTS

[0005] The utility model mainly aims at providing a battery structure, including the casing, the casing top is equipped with the cap, is equipped with the sealing ring between the cap and the casing;

[0006] The inside of casing is equipped with first current collector disc, second current collector disc and electricity core, and the top and bottom of electricity core are equipped with first current collector disc and second current collector disc respectively, and the first current collector disc is located between the cap and electricity core;

[0007] The edge of first current collector disc extends a bending part, the bending part extends a connecting part, the connecting part is located between the cap and first current collector disc through the bending part, and the connecting part is connected with the side of the cap inside the casing;The first current collector disc, the bending part and the connecting part are integrated.

[0008] Optionally, the middle part of the cap is outwardly convex as a boss, the middle part of the boss is provided with a liquid injection hole, and a sealing element is arranged in the liquid injection hole;

[0009] The middle part of the first current collector disc is provided with a first center hole, and the liquid injection hole is arranged opposite and aligned with the first center hole;

[0010] The connecting range of the connecting part and the cap is located outside the projection range of the boss.

[0011] Optionally, the connecting part extends between the liquid injection hole and the first center hole, the connecting part is provided with a second center hole, and the first center hole and the second center hole are oppositely and aligningly arranged.

[0012] Optionally, the liquid injection hole is narrowed towards the inside of the shell and has a predetermined taper, and the sealing member is a sealing steel ball.

[0013] Optionally, the thickness of the cap is 1.5 mm, the diameter of the sealing steel ball is 2 mm, the taper of the liquid injection hole is 3.8-4.1 degrees, the inlet outer diameter of the liquid injection hole is 2.00-2.05 mm, and the outlet outer diameter of the liquid injection hole is 1.90-1.95 mm.

[0014] Optionally, the liquid injection hole comprises a first through hole and a second through hole which are continuous and interconnected, the first through hole is communicated with the outside of the shell, the second through hole is communicated with the inside of the shell, and the outer diameter of the first through hole is greater than that of the second through hole.

[0015] The sealing member comprises a glue pin and an aluminum pin, the aluminum pin is arranged in the first through hole, and the glue pin is arranged in the second through hole.

[0016] Optionally, the middle part of the cap is outwardly protruded to form a boss, the boss is provided with a liquid injection hole, and the liquid injection hole is provided with a sealing member.

[0017] The middle part of the first current collecting disc is provided with a first center hole, and the liquid injection hole is oppositely and aligningly arranged with the first center hole.

[0018] The connecting part is bent to form oppositely arranged first and second connecting parts, the first connecting part is connected with the bending part, the second connecting part is connected with the cap, the second connecting part is provided with a second center hole, and the second center hole is coaxially arranged with the liquid injection hole.

[0019] Optionally, the first current collecting disc is provided with a vent hole.

[0020] Optionally, the connecting part is a transition nickel sheet.

[0021] Optionally, the first current collecting disc is made of aluminum, and the cap is made of SPCC.

[0022] The utility model also provides a kind of electric equipment, and the electric equipment is energized by above-mentioned battery structure.

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] The battery structure provided by the utility model has the advantages that the connecting part of the first current collecting disc and the connecting cap is made into an integrated structure, the first current collecting disc is directly connected with the cap through the connecting part connected by the bending part, the structure of the connecting sheet additionally connected between the conventional cap and the current collecting disc is simplified, and the first current collecting disc is provided with the hole for liquid injection. BRIEF DESCRIPTION OF DRAWINGS

[0025] One or more embodiments are illustrated by way of example with reference to the accompanying drawings, which are schematic and not intended to be limiting of the embodiments, and in which like reference numerals refer to like elements in the various figures of the drawings in which: the figures do not limit the proportion of the drawings.

[0026] Figure 1 For the battery structure embodiment schematic diagram of the utility model;

[0027] Figure 2 For the battery structure embodiment cap and first current collecting disc connection schematic Figure 1 ;

[0028] Figure 3 For the battery structure embodiment cap and first current collecting disc connection schematic Figure 2 ;

[0029] Figure 4 For the battery structure embodiment liquid injection hole schematic diagram;

[0030] Figure 5 For the battery structure embodiment first kind first current collecting disc schematic diagram;

[0031] Figure 6 For the battery structure embodiment second kind first current collecting disc schematic diagram;

[0032] Figure 7 For the battery structure embodiment third kind first current collecting disc and cap connection schematic diagram.

[0033] Reference signs:

[0034] 1 - shell; 2 - cap; 21 - boss; 22 - liquid injection hole; 3 - first current collecting disc; 31 - bending part; 32 - connecting part; 321 - second center hole; 322 - first connecting part; 323 - second connecting part; 324 - third center hole; 33 - first center hole; 34 - vent hole; 4 - sealing ring; 5 - second current collecting disc; 6 - sealing element; 61 - glue nail; 62 - aluminum nail; 7 - electric core. DETAILED DESCRIPTION

[0035] For the convenience of understanding the utility model, the utility model is explained in more detail below in combination with the drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element or one or more intervening elements can be present therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element or one or more intervening elements can be present therebetween. The terms "vertical", "horizontal", "left", "right", "inner", "outer" and similar expressions used in the specification are for the purpose of illustration only. In the description of the utility model, the terms "first", "second" are only for the purpose of description and cannot be understood as indicating relative importance or implying the number of the indicated technical features. Therefore, unless otherwise specified, the features with "first", "second" can explicitly or implicitly include one or more of the features; the meaning of "multiple" is two or more. The term "include" and any variation thereof means non-exclusive inclusion, and one or more other features, integers, steps, operations, units, components and / or combinations thereof can be present or added.

[0036] In addition, unless otherwise explicitly specified and limited, the terms "mount", "connect", "connect" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or internal communication of two elements. All technical and scientific terms used in the specification have the same meaning as understood by the person skilled in the art of the utility model. The terms used in the specification of the utility model are only for the purpose of describing the specific embodiments and are not applicable to limit the utility model. The term "and / or" used in the specification includes any and all combinations of one or more related listed items.

[0037] In addition, the technical features involved in the different embodiments of the utility model described below can be combined with each other as long as there is no conflict between them.

[0038] The connection of the conventional current collecting plate and the cap requires connection sheet to connect, and in the production process, the connection sheet and the current collecting plate need to be welded, and the connection sheet and the cap need to be welded, two side welding is required, and the openings of the connection sheet and the current collecting plate need to be made respectively. The application scheme extends the bending part and the connecting part connected with the bending part from the edge of the first current collecting plate, makes the first current collecting plate and the connecting part connected with the cap into an integrated structure, simplifies the traditional double-layer structure, and simplifies the production and manufacturing process through the simplified structure. In the production and manufacturing process, only the connecting part and the cap need to be welded, and the connecting part can be opened when the first current collecting plate is opened.

[0039] As Figures 1-7 shown, the battery structure embodiment schematic diagram provided by the utility model.

[0040] Please refer to Figures 1-7 , the embodiment includes the shell 1, the shell 1 top is equipped with the cap 2, and the cap 2 is equipped with the sealing ring 4 between the shell 1. The sealing ring 4 is specifically sealing rubber ring, is located between the cap 2 edge and the shell 1 inside, is used for the sealing between the shell 1 inside and outside.

[0041] The shell 1 inside is equipped with the first current collecting disc 3, the second current collecting disc 5 and the electric core 7, and the top and bottom of the electric core 7 are equipped with the first current collecting disc 3 and the second current collecting disc 5 respectively. The first current collecting disc 3 is located between the cap 2 and the electric core 7. The first current collecting disc 3 edge extends a bending part 31, and the bending part 31 extends a connecting part 32, and the connecting part 32 is located between the cap 2 and the first current collecting disc 3 through the bending part 31, and the connecting part 32 is connected with the one side of the cap 2 inside the shell 1.

[0042] The first current collecting disc 3, the bending part 31 and the connecting part 32 are integrated structure. Specifically, the bending part 31 and the connecting part 32 led out of the first current collecting disc 3 are integrated structure by laser welding.

[0043] By making the first current collecting disc 3 and the connecting part 32 connecting the cap 2 into integrated structure, the first current collecting disc 3 can be directly connected with the cap 2 through the connecting part 32 connected by the bending part 31, which simplifies the structure of the additional connecting sheet between the conventional cap and the current collecting disc, and further can simplify the battery production manufacturing process.

[0044] In an embodiment, the cap 2 middle part is outwardly protruding and presents a boss 21, the boss 21 middle part is equipped with the liquid injection hole 22, and the liquid injection hole 22 is equipped with the sealing element 6. The liquid injection hole 22 is used for injecting electrolyte, and the sealing element 6 is used for sealing after the liquid injection of the liquid injection hole 22.

[0045] The first current collecting disc 3 middle part is equipped with the first center hole 33, and the liquid injection hole 22 is opposite and aligned with the first center hole 33. As Figure 2 and Figure 5 shown, the connecting range of the connecting part 32 and the cap 2 is located outside the orthographic projection range of the boss 21, that is, the length of the connecting part 32 does not extend into the corresponding recess of the boss 21, and does not block between the liquid injection hole 22 and the first center hole.

[0046] In addition, as Figure 6As shown, the connecting portion 32 can also extend to between the liquid injection hole 22 and the first center hole 33, that is, the connecting portion 32 covers the corresponding recess of the boss 21 to increase the contact area of the connecting portion 32 with the cap 2, facilitating welding. The connecting portion 32 is provided with a second center hole 321, and the first center hole 33 and the second center hole 321 are oppositely and aligningly arranged, and the liquid injection hole 22, the first center hole 33 and the second center hole 321 form a communication liquid injection channel.

[0047] In an embodiment, as shown in Figure 2 and Figure 4 shown, the liquid injection hole 22 narrows towards the inside of the shell 1, that is, a tapered hole, and has a certain taper, and the sealing member 6 adopts a sealing steel ball. The sealing is achieved by clamping the sealing steel ball into the liquid injection hole 22 with taper.

[0048] Specifically, as shown in Figure 4 , the thickness of the cap 2 is 1.5 mm, the diameter of the sealing steel ball is 2 mm, and the taper of the liquid injection hole 22 is 3.8-4.1 degrees. In this embodiment, the taper is specifically 3.82 degrees, the inlet outer diameter of the liquid injection hole 22 is 2.00-2.05 mm, and the outlet outer diameter of the liquid injection hole 2 is 1.90-1.95 mm. The surface roughness Ra of the inner wall of the tapered hole is ≤0.8um. The advantage of this shaped tapered hole is that the sealing steel ball can be tightly fixed in the liquid injection hole 22 under the premise that it can be punched into the liquid injection hole 22, and the smoothness of the inner wall of the tapered hole ensures the close fit of the sealing steel ball and the inner wall of the liquid injection hole 22, reducing the possibility of liquid leakage.

[0049] In another embodiment, the sealing method as shown in Figure 3 can also be used, the liquid injection hole 22 includes a first through hole and a second through hole which are continuous and communicate with each other, the first through hole communicates with the outside of the shell 1, and the second through hole communicates with the inside of the shell 1, and the outer diameter of the first through hole is larger than that of the second through hole. The sealing member 6 includes a rubber nail 61 and an aluminum nail 62, the aluminum nail 62 is arranged in the first through hole, and the rubber nail 61 is arranged in the second through hole.

[0050] In an embodiment, the first current collector 3 is provided with a plurality of air holes 34 which are arranged around the first center hole 33.

[0051] In an embodiment, the connecting portion 32 is specifically a transition nickel sheet.

[0052] In an embodiment, the first current collector 3 is specifically made of aluminum, and the material of the cap is SPCC.

[0053] In another embodiment, as shown in Figure 7 , the middle part of the cap 2 protrudes outward to form a boss 21, the boss 21 is provided with a liquid injection hole 22 in the middle part, and the liquid injection hole 22 is provided with a sealing member 6. The middle part of the first current collector 3 is provided with a first center hole 33, and the liquid injection hole 22 and the first center hole 33 are oppositely and aligningly arranged.

[0054] The connecting part 32 is bent to form a first connecting part 322 and a second connecting part 323, the first connecting part 322 is connected to the bending part 31, and the second connecting part 323 is connected to the cap 2, and the second connecting part 323 is provided with a second center hole 321 coaxial with the liquid injection hole 22.

[0055] The first connecting part 322, the second connecting part 323, the bending part 31 and the first current collector 3 form a Z-shaped structure in cross section, the contact surface with the cap 2 is increased through the first connecting part 322 and the second connecting part 323, and the welding is facilitated. The first center hole 33, the second center hole 321, the third center hole 324 and the liquid injection hole 22 form a liquid injection channel.

[0056] The utility model also provides a kind of electric equipment embodiment, which is powered by the above battery structure embodiment.

[0057] As described above, the embodiment of the utility model provides that the connecting part of the first current collector and the connecting cap is made into an integrated structure, the first current collector can be directly connected to the cap through the connecting part connected by the bending part, simplifying the structure of the additional connecting sheet between the conventional cap and the current collector;A hole is opened in the first current collector for liquid injection, and a hole can also be opened in the connecting part for liquid injection.

[0058] The above embodiments are only used to illustrate the technical solutions of the utility model, but not to limit them;Under the idea of the utility model, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the utility model as described above, which are not provided in details for simplicity;Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced equivalently;These modifications or replacements do not change the essence of the corresponding technical solutions out of the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A battery structure, characterized by, The shell is provided with a cap at the top, and a sealing ring is arranged between the cap and the shell; The inside of the shell is provided with a first current collecting plate, a second current collecting plate and a cell, the top and bottom of the cell are respectively provided with the first current collecting plate and the second current collecting plate, and the first current collecting plate is located between the cap and the cell; The edge of the first current collecting plate extends a bending part, the bending part extends a connecting part, the connecting part is located between the cap and the first current collecting plate through the bending part, and the connecting part is connected to one side of the cap inside the shell; the first current collecting plate, the bending part and the connecting part are an integral structure.

2. The battery structure of claim 1, wherein The middle part of the cap is outwardly protruding as a boss, the middle part of the boss is provided with a liquid injection hole, and a sealing element is arranged in the liquid injection hole; The middle part of the first current collecting plate is provided with a first center hole, and the liquid injection hole is arranged opposite and aligned with the first center hole; The connection range of the connecting part and the cap is located outside the projection range of the boss.

3. The battery structure of claim 2, wherein, The connecting part extends between the liquid injection hole and the first center hole, the connecting part is provided with a second center hole, and the first center hole is arranged opposite and aligned with the second center hole.

4. The battery structure of claim 2, wherein The liquid injection hole narrows towards the inside of the shell and has a predetermined taper, and the sealing element is a sealing steel ball.

5. The battery structure of claim 4, wherein, The thickness of the cap is 1.5mm, the diameter of the sealing steel ball is 2mm, the taper of the liquid injection hole is 3.8-4.1 degrees, the inlet outer diameter of the liquid injection hole is 2.00-2.05mm, and the outlet outer diameter of the liquid injection hole is 1.90-1.95mm.

6. The battery structure of claim 2, wherein The liquid injection hole includes a first through hole and a second through hole which are continuous and interconnected, the first through hole communicates with the outside of the shell, and the second through hole communicates with the inside of the shell; the hole outer diameter of the first through hole is greater than the outer diameter of the second through hole; The sealing element includes a glue pin and an aluminum pin, the aluminum pin is arranged in the first through hole, and the glue pin is arranged in the second through hole.

7. The battery structure of claim 1, wherein The middle part of the cap is outwardly protruding as a boss, the middle part of the boss is provided with a liquid injection hole, and a sealing element is arranged in the liquid injection hole; The middle part of the first current collecting plate is provided with a first center hole, and the liquid injection hole is arranged opposite and aligned with the first center hole; The connecting part is bent to form a first connecting part and a second connecting part opposite to each other, the first connecting part is connected to the bending part, the second connecting part is connected to the cap, the second connecting part is provided with a second center hole, and the second center hole is coaxially arranged with the liquid injection hole.

8. The battery structure of claim 1, wherein The first current collecting plate is provided with a vent hole.

9. The battery structure of claim 1, wherein, The first current collecting plate is made of aluminum, the cap is made of SPCC, and the connecting part is a nickel adapter.

10. An electric device, characterized by The electrical equipment is powered by the battery structure according to any one of claims 1-9.

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