WO2022253052A1

WO2022253052A1 - Battery case structure and battery

Info

Publication number: WO2022253052A1
Application number: PCT/CN2022/094774
Authority: WO
Inventors: 林鸿凯; 曾玉祥; 王永旺; 许德胜; 陈龙云
Original assignee: 珠海冠宇电池股份有限公司
Priority date: 2021-06-03
Filing date: 2022-05-24
Publication date: 2022-12-08
Also published as: CN113363640A

Abstract

The present invention provides a battery case structure and a battery. The battery case structure comprises a bottom housing and a cover plate assembly; the bottom housing and the cover plate assembly jointly enclose to form an accommodating cavity; the cover plate assembly comprises a top cover, an insulating member, and a conductive member; the top cover is connected to the top of the bottom housing; a through hole is formed on the top cover; the conductive member is provided on the through hole; the insulating member is provided between the top cover and the conductive member; the top cover, the conductive member, and the insulating member are of a single-layer structure; and the top cover is sealably connected to the bottom housing. The battery case structure and the battery provided by the present invention can increase an effective volume of an inner cavity of a battery by means of a single-layer cover plate assembly provided thereon under the condition that the volume of the battery is fixed, thereby improving battery capacity, and is thus used for solving the problem in the prior art of small battery capacity caused by a decrease in an effective volume of an inner cavity of a battery due to a large thickness of a cover plate assembly of the battery.

Description

Battery case structure and battery

This application claims the priority of a Chinese patent application with application number 202110617950.9 and application title "Battery Housing Structure and Battery" submitted to the China Patent Office on June 3, 2021, the entire contents of which are incorporated in this application by reference.

technical field

The invention relates to the technical field of batteries, in particular to a battery case structure and a battery.

Background technique

As wearable electronic products are more and more widely used, and the appearance of electronic products tends to be more miniaturized, it has become a common phenomenon that batteries are used as power sources, and their usage is also increasing day by day. At present, the battery mainly includes a bottom case, a cover plate assembly, and a cell assembly. The core assembly is electrically connected with the bottom case and the cover plate assembly of the battery through the positive pole tab and the negative pole tab provided thereon. Among them, the bottom shell and the cover plate assembly are often combined by welding, riveting or PP welding, and the cover plate assembly is usually an insulating layer superimposed between two layers of metal.

However, without changing the internal system of the battery, its shell structure has a great impact on the performance and capacity of the battery. The cover plate assembly of the battery shell often adopts a multi-layer structure, which makes the thickness of the battery cover plate assembly thicker. In the case of a certain volume, the effective volume of the battery cavity is reduced, which is not conducive to the improvement of the battery capacity.

Contents of the invention

The invention provides a battery casing structure and a battery, which are used to solve the problem that the thickness of the battery cover plate assembly in the prior art is relatively thick, and when the battery volume is constant, the effective volume of the battery inner cavity is reduced, which in turn leads to a small battery capacity. The problem.

To achieve the above object, the present invention provides a battery casing structure, comprising: a bottom case and a cover plate assembly, the bottom case and the cover plate assembly jointly enclose an accommodating cavity;

The cover plate assembly includes a top cover, an insulating part and a conductive part;

The top cover is connected to the top of the bottom case, a through hole is opened on the top cover, the conductive part is arranged on the through hole, and the insulating part is arranged on the top cover and the conductive part Between, wherein, the top cover, the conductive member and the insulating member are of a single-layer structure, and the top cover is hermetically connected to the bottom case.

In a possible implementation manner, at least one end surface of the insulator has a convex structure or a concave structure;

The end surface of the top cover, the conductive part and the insulating part in contact with each other is a concave structure matched with the convex structure;

Alternatively, the top cover and the end surface on one side where the conductive member and the insulating member are in contact with each other have a convex structure matched with the concave structure.

In a possible implementation manner, the convex structure or the concave structure is a "V" structure.

In a possible implementation manner, the thickness of the cover plate assembly is >0.08mm.

In a possible implementation manner, the insulating member is connected to the top cover and the end surface of the conductive member.

In a possible implementation manner, the material of the top cover and/or the conductive member is stainless steel.

In a possible implementation manner, the width of the insulating member is greater than or equal to 0.5 mm.

In a possible implementation manner, the material of the insulating member includes silicon dioxide or ceramics.

In a possible implementation manner, the insulating member is fixedly connected to the top cover and the conductive member by sintering.

The present invention also provides a battery, including a battery cell assembly and the above-mentioned battery shell structure, the battery cell assembly is accommodated in the bottom case, and the cover plate assembly is sealed and connected to the bottom case;

The positive tab of the cell assembly is connected to the bottom case or the top cover, and the negative tab of the cell assembly is connected to a conductive member;

Alternatively, the negative tab of the cell assembly is connected to the bottom case or the top cover, and the positive tab of the cell assembly is connected to the conductive member.

The invention provides a battery case structure and a battery, wherein the battery case structure includes: a bottom case and a cover plate assembly, the bottom case and the cover plate assembly jointly enclose an accommodating cavity; the cover plate assembly includes a top cover, an insulating part and a conductive part; The cover is connected to the top of the bottom case, a through hole is opened on the top cover, the conductive part is arranged on the through hole, and the insulating part is arranged between the top cover and the conductive part, wherein the top cover, the conductive part and the insulating part are of a single layer structure, The top cover is airtightly connected with the bottom case. The battery casing structure and the battery provided by the present invention, through the single-layer cover plate assembly provided on it, can increase the effective volume of the battery inner cavity when the battery volume is constant, thereby increasing the battery capacity, and are used to solve the problems in the prior art. The thickness of the battery cover plate assembly is relatively thick, resulting in a decrease in the effective volume of the battery inner cavity, which in turn leads to the problem of a small battery capacity.

In addition to the technical problems solved by the embodiments of the present invention described above, the technical features constituting the technical solutions, and the beneficial effects brought by the technical features of these technical solutions, the battery case structure provided by the embodiments of the present invention and the battery solve other The technical problems, other technical features included in the technical solution, and the beneficial effects brought by these technical features will be further described in detail in the specific implementation.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings on the premise of not paying creative efforts.

Fig. 1 is a cross-sectional view of an existing battery casing adopting a riveting method;

Figure 2 is a cross-sectional view of the existing battery shell structure using PP welding;

Fig. 3 is a perspective view of the structure of the battery casing provided by Embodiment 1 of the present invention;

Fig. 4 is a front view of the structure of the battery casing provided by Embodiment 1 of the present invention;

Fig. 5 is a top view of the structure of the battery casing provided by Embodiment 1 of the present invention;

Fig. 6 is a B-B cross-sectional view of the battery case structure provided by Embodiment 1 of the present invention;

Fig. 7 is an enlarged view of part C of the battery casing structure provided by Embodiment 1 of the present invention.

Explanation of reference signs:

current technology:

10: battery case;

11: Cover assembly;

111: ring structure;

112: insulating part;

113: rivets;

114: circular structure;

12: Bottom shell;

this invention:

10: battery case;

11: Cover assembly;

111: conductive part;

1111: the first end face;

112: insulating part;

1121: the second end surface;

1122: the third end face;

113: top cover;

1131: the fourth end face;

12: Bottom case.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Batteries are widely used in various electronic products because of their stable discharge voltage, wide operating temperature range, and long storage life. Miniaturized electronic products have relatively strict requirements on the space size of the battery. When the volume of the battery case remains the same, it poses a huge challenge to the battery capacity of the battery.

Existing batteries generally include a cell assembly and a casing structure for wrapping the cell assembly. The cell assembly is the core component of the battery and mainly provides electrical energy for electronic products. The battery casing structure generally includes a bottom case and a cover assembly. The shell is used for accommodating the battery cell assembly, and the cover plate assembly is used for cooperating with the bottom case to form a closed accommodating chamber for accommodating the battery cell assembly.

Figure 1 is a cross-sectional view of the structure of the battery casing using a riveting method. Referring to FIG. 1, the battery case 10 includes a bottom case 12 and a cover plate assembly 11. The bottom case 12 is a cylindrical metal structure with grooves. The cover plate assembly 11 includes an outer ring structure 111 and an inner upper and lower raised structure. Wherein, the materials of the ring structure 111 and the bottom case 12 are both metal, and the ring structure 111 and the bottom case 12 are buckled relatively and welded together. A rivet 113 is provided in the middle of the ring structure 111, and an insulator 112 is provided between the ring structure 111 and the rivet 113 to isolate the ring structure 111 from the rivet 113. The negative electrode lug is connected with the ring structure 111 and the rivet 113, so as to generate electric energy through electrochemical reaction. In this solution, due to the arrangement of the rivet 113, the welding area of the tab is small, and the thickness of the battery cover assembly 11 is increased, thereby reducing the volume of the battery inner cavity and reducing the battery capacity.

Figure 2 is a cross-sectional view of the battery shell structure using PP welding. In this solution, the battery case 10 includes a bottom case 12 and a cover plate assembly 11, the bottom case 12 is a cylindrical metal structure with grooves, the cover plate assembly 11 is a planar structure with three layers of thickness, and the outermost surface of the cover plate assembly 11 is The ring is a hollow metal ring structure 111 , which is used for fastening and welding with the bottom case 12 . A metal circular structure 114 is provided directly above the annular structure 111, and a circle of insulating member 112 is provided between the annular structure 111 and the circular structure 114. The insulating member 112 is used to isolate the gap between the annular structure 111 and the circular structure 114. At the same time, the insulator 112 realizes the connection of the annular structure 111 , the insulator 112 and the circular structure 114 through its own welding. The cell assembly is connected to the ring structure 111 and the circular structure 114 through the positive pole lug and the negative pole lug provided thereon, so as to generate electric energy through electrochemical reaction. In this solution, since the battery cover assembly 11 is a planar structure with three layers of thickness, the thickness of the battery cover assembly 11 is increased. When the battery volume is constant, the volume of the battery cavity is reduced, so that the battery capacity is reduced. , this solution needs to passivate the annular structure 111 and the circular structure 114 before welding the insulator 112 during operation, the process flow is relatively complicated, the cost is high, and it is not easy to operate.

In view of the above problems, the present invention provides a battery case structure and a battery, wherein the battery case structure includes: a bottom case and a cover plate assembly, the bottom case and the cover plate assembly jointly enclose an accommodating cavity; the cover plate assembly includes a top cover, an insulator and The conductive part; the top cover is connected to the top of the bottom case, and a through hole is opened on the top cover, the conductive part is arranged on the through hole, and the insulating part is arranged between the top cover and the conductive part, wherein the top cover, the conductive part and the insulating part are Single-layer structure, the top cover and the bottom case are sealed and connected. The battery casing structure and the battery provided by the present invention, through the single-layer cover plate assembly provided on it, can increase the effective volume of the battery inner cavity when the battery volume is constant, thereby increasing the battery capacity, and are used to solve the problems in the prior art. The thickness of the battery cover plate assembly is relatively thick, resulting in a decrease in the effective volume of the battery inner cavity, which in turn leads to the problem of a small battery capacity. The battery casing structure and the battery provided by the embodiments of the present invention will be further described below.

Embodiment one

This embodiment provides a battery case structure. Fig. 3 is a perspective view of the structure of the battery case provided by Embodiment 1 of the present invention; Fig. 4 is a front view of the structure of the battery case provided by Embodiment 1 of the present invention; Fig. 5 is a top view of the structure of the battery case provided by Embodiment 1 of the present invention; B-B sectional view of the battery casing structure provided by Embodiment 1 of the present invention, and FIG. 7 is an enlarged view of part C of the battery casing structure provided by Embodiment 1 of the present invention.

Referring to Fig. 3, the battery case 10 is used to accommodate the cell assembly, including the bottom case 12 and the cover assembly 11, the bottom case 12 and the cover assembly 11 together form an accommodation cavity, specifically, the battery can be a button battery, It can be a cylindrical battery, a square battery, or a special-shaped battery, and the shape of the battery is not limited.

In this embodiment, the bottom case 12 includes a bottom wall and a side wall extending from the bottom wall, the bottom case 12 is used to house the cell assembly, and the top cover 113 is sealingly connected with the bottom case 12, specifically, the top cover 113 is connected On the side wall of the bottom case 12. The bottom case 12 is made of conductive material, which may be metal, such as stainless steel. In this embodiment, the cover plate assembly 11 includes a top cover 113, an insulating part 112 and a conductive part 111, the top cover 113 is connected to the top of the bottom case 12, a through hole is opened on the top cover 113, and the conductive part 111 is arranged in the through hole Above, the insulating member 112 is disposed between the top cover 113 and the conductive member 111 . That is to say, the insulating member 112 is disposed between the top cover 113 and the conductive member 111 for isolating the contact between the top cover 113 and the conductive member 111 .

In addition, the top cover 113 , the conductive member 111 and the insulating member 112 are of a single-layer structure, and the top cover 113 is sealed and connected to the bottom case 12 . It should be noted here that the top cover 113, the conductive member 111 and the insulating member 112 are all of a single-layer structure, and jointly form a single-layer cover plate assembly 11. 12, the top cover 113 and the bottom case 12 can be sealed and connected together by welding, and can also be sealed and connected together by fasteners, and the specific connection methods are not limited.

4 and 5, the outer circumference of the conductive member 111 is provided with a first end surface 1111, the inner circumference of the insulating member 112 is provided with a second end surface 1121, and the outer circumference of the insulating member 112 is provided with a third end surface 1122. A fourth end surface 1131 is provided around the inner side of 113 .

In this embodiment, the top cover 113 of the cover assembly 11 may be a conductive structure or an insulating structure. Specifically, the top cover 113 and the conductive member 111 can be conductive structures made of the same metal material, or the top cover 113 and the conductive member 111 can be conductive structures made of two different metal materials, or the top cover 113 It is an insulating structure.

The materials of the top cover 113 and the conductive member 111 can be the same or different, and can be metals with the same material or metals with different materials, or one can be a metal material and the other can be a non-metallic material, for example, 113 and the conductive member 111 are made of stainless steel. For another example, the top cover 113 is stainless steel, and the conductive member 111 is copper. For another example, the top cover 113 is plastic, and the conductive member 111 is stainless steel. Of course, the top cover 113 and the conductive member 111 are also Other materials can be used, and there is no limitation on specific materials.

In some embodiments, the material of the top cover 113 and/or the conductive member 111 is stainless steel, that is to say, the materials of the top cover 113 and the conductive member 111 are both stainless steel, or the material of the top cover 113 is stainless steel, and the conductive member The material of 111 is other, or, the material of the conductive member 111 is stainless steel, and the material of the top cover 113 is other.

In this embodiment, the insulating member 112 is an insulating material, which may be a single insulating material, or a mixture of various insulating materials. The material may be non-metallic materials such as rubber, resin, polypropylene, etc. The specific insulating material is not It is not limited to the several materials mentioned above, and can also be other materials. Certainly, the insulating member 112 may include silicon dioxide, for example, since silicon dioxide has superior stability, adsorption force and strong hardness, it can be well connected with the top cover 113 and the conductive member 111 . In addition, the material of the insulator 112 can also include ceramics. Since the ceramic material has the advantages of high melting point, high hardness, high wear resistance and oxidation resistance, natural or synthetic compounds can be used with the top cover 113 and the conductive parts after molding and high-temperature sintering. 111 forms an integrated structure, which can effectively ensure the connection strength.

It should be noted here that the top cover 113, the conductive member 111 and the insulating member 112 have a single-layer structure, that is to say, the top cover 113, the conductive member 111 and the insulating member 112 can be welded, welded or sintered at the end faces. And other ways to connect together to form an integrated single-layer structure. The single-layer structure can be a circular planar structure, a conical structure, or a cylindrical structure with grooves. The specific shape No limit. In this embodiment, the effect of connecting the top cover 113, the conductive member 111 and the insulating member 112 through sintering of the end faces is better, which can effectively ensure the connection strength between the three. Of course, they can also be connected in other ways. At the same time, the specific connection method is not limited.

In addition, the insulator 112 can be a hollow circular ring structure, a hollow oval structure, a hollow square structure, a hollow polygonal structure and a hollow irregular structure, and the insulator 112 can have various shapes. , the specific shape is not limited. In this embodiment, the cell assembly accommodated in the bottom case 12 is connected to the battery casing 10 through the positive tab and the negative tab provided thereon, forming the positive and negative terminals of the battery.

What needs to be explained here is that when the positive pole tab of the cell assembly is connected to the bottom case 12 or the top cover 113 to form a positive terminal, the negative pole tab is connected to the conductive member 111 to form a negative terminal; When connecting to the bottom case 12 or the top cover 113 to form a negative terminal, the positive tab is connected to the conductive member 111 to form a positive terminal.

The purpose of the insulator 112 is to isolate the contact between the top cover 113 and the conductive part 111 and play an insulating role. Therefore, when the top cover 113 is a conductive structure, the width of the insulator 112 is required to be greater than or equal to 0.5mm. , it should be noted that when the insulator 112 has an irregular shape, it is required that the minimum width of the insulator 112 must be greater than or equal to 0.5mm, so that the insulation effect is better. Compared with the insulation distance between the positive and negative electrodes of the battery in the prior art, In this embodiment, the insulation distance between the positive and negative electrodes is longer, and the battery is less likely to be short-circuited.

Specifically, the shape and size of the insulating member 112 are not limited, so the shapes of the conductive member 111 and the top cover 113 are not limited. When the inner ring area of the insulating member 112 is larger, the area of the conductive member 111 will also be larger. Larger ones make it easier to weld the lugs.

In this embodiment, at least one end surface of the insulating member 112 of the cover assembly 11 is a convex structure or a concave structure, that is to say, at least one of the second end surface 1121 and the third end surface 1122 of the insulating member 112 The end surface is a convex structure, and at least one end surface of the second end surface 1121 and the third end surface 1122 is a concave structure, or the second end surface 1121 and the third end surface 1122 are both convex structures, or the second end surface 1121 and the third end surface 1122 are both convex structures. The third end surfaces 1122 are all concave structures.

Specifically, the top cover 113, the conductive member 111 and the insulating member 112 are of a single-layer structure, the first end surface 1111 on the conductive member 111 cooperates with the second end surface 1121 of the insulating member 112, and the third end surface 1122 of the insulating member 112 is connected to the top surface. The fourth end surfaces 1131 on the cover 113 cooperate with each other.

When at least one end surface of the insulator 112 has a convex structure or a concave structure, the end surface of the top cover 113 and the conductive element 111 in contact with the insulator 112 is a convex structure matching the concave structure. Alternatively, the top cover 113 and the end surface on one side where the conductive member 111 and the insulating member 112 are in contact with each other have a convex structure matched with a concave structure.

That is to say, when the second end surface 1121 of the insulating member 112 is a convex structure, the first end surface 1111 of the conductive member 111 is a concave structure; when the third end surface 1122 of the insulating member 112 is a convex structure, the top cover The fourth end surface 1131 of 113 is concave. On the contrary, when the second end surface 1121 of the insulator 112 is a concave structure, the first end surface 1111 of the conductive member 111 is a convex structure; The four end faces 1131 are convex structures. Of course, when the second end surface 1121 or the third end surface 1122 of the insulator 112 is a planar structure, the first end surface 1111 of the conductive member 111 or the fourth end surface 1131 of the top cover 113 is a planar structure matched with the planar structure.

In this embodiment, the above-mentioned convex structure and concave structure can have various shapes, such as "C" type structure, "S" type structure, slope structure, "M" type structure, " W"-shaped structure and "V"-shaped structure, of course, said convex structure and concave structure are not limited to the above-mentioned several structures, and can also be other structures, and the specific shape and structure are not limited.

6 and 7, the second end surface 1121 and the third end surface 1122 of the insulator 112 are "V"-shaped structures with opposite directions, and the first end surface 1111 of the conductive element 111 and the fourth end surface 1131 of the top cover 113 are A "V"-shaped structure matched with the second end surface 1121 and the third end surface 1122 .

In this embodiment, the second end surface 1121 and the third end surface 1122 of the insulator 112 are configured as a convex structure and a concave structure, in order to match the first end surface 1111 of the conductive element 111 and the fourth end surface of the top cover 113 1131 The combination is tighter and the connection is tighter. Of course, when the second end surface 1121 and the third end surface 1122 are arranged in a "V" shape, the connection strength between the insulator 112 and the conductive element 111 and the top cover 113 is better than that when they are arranged in a plane or slope structure.

The insulator 112 , the conductive member 111 and the top cover 113 can be fixedly connected by non-metallic sintering, and finally an integrated single-layer cover plate assembly 11 can be formed. It should be noted that the thickness of the single-layer cover assembly 11 needs to be greater than 0.08 mm, so as to ensure the hardness and connection strength of the cover assembly 11 itself. When the thickness of the cover plate assembly 11 is greater than 0.08mm, the thinner the cover plate assembly 11 is, the larger the effective volume of the battery cavity will be, and the battery capacity will be increased accordingly. Compared with the cover plate assembly with three layers of thickness in the traditional structure 11, the thickness of the cover plate assembly 11 in this embodiment is only a single-layer structure, which reduces the thickness of the cover plate assembly 11, expands the effective volume of the battery inner cavity, and improves the battery capacity, and the integrated single-layer cover plate The component 11 makes the structure of the battery case 10 more flat and beautiful, without unnecessary irregular shapes on the outside, which is more conducive to the design of the terminal space of electronic products.

Embodiment two

Embodiment 2 of the present invention provides a battery, including a cell assembly and the structure of the battery casing 10 in Embodiment 1. Wherein, the battery housing 10 includes a bottom case 12 and a cover plate assembly 11, the bottom case 12 and the cover plate assembly 11 jointly form an accommodating cavity for accommodating the battery cell assembly; the cover plate assembly 11 includes a top cover 113, an insulating member 112 and a conductive member 111 , the top cover 113 is connected to the top of the bottom case 12 , the top cover 113 is provided with a through hole, the conductive member 111 is arranged on the through hole, and the insulating member 112 is arranged between the top cover 113 and the conductive member 111 . Moreover, the top cover 113 , the insulating member 112 and the conductive member 111 are all of a single-layer structure, and are connected together to form a single-layer cover plate assembly 11 , and the top cover 113 is sealed and connected to the bottom case 12 .

In this embodiment, when the positive tab of the cell assembly is connected to the bottom case 12 or the top cover 113 to form a positive terminal, the negative tab of the cell assembly is connected to the conductive member 111 to form a negative terminal; When the tab is connected to the bottom case 12 or the top cover 113 to form a negative terminal, the positive tab of the cell assembly is connected to the conductive member 111 to form a positive terminal. It is converted into electrical energy through electrochemical reactions to provide energy for electronic products.

The battery provided in this embodiment, through the single-layer cover assembly 11 provided thereon, can increase the effective volume of the inner chamber of the battery when the volume of the battery is constant, thereby increasing the capacity of the battery. Moreover, the integrated single-layer cover plate assembly 11 makes the structure of the battery case 10 more flat and beautiful, without unnecessary irregular shapes on the outside, which is more conducive to the design of the terminal space of electronic products.

The present invention provides a structure of a battery case 10 and a battery, wherein the structure of the battery case 10 includes: a bottom case 12 and a cover plate assembly 11, the bottom case 12 and the cover plate assembly 11 together form an accommodating cavity; the cover plate assembly 11 includes a top cover 113 , an insulating part 112 and a conductive part 111; the top cover 113 is connected to the top of the bottom case 12, the top cover 113 is provided with a through hole, the conductive part 111 is arranged on the through hole, and the insulating part 112 is arranged between the top cover 113 and the conductive part 111 Between, wherein, the top cover 113 , the conductive member 111 and the insulating member 112 are a single-layer structure, and the top cover 113 is connected to the bottom case 12 in a sealed manner. The structure of the battery casing 10 and the battery provided by the present invention, through the single-layer cover plate assembly 11 provided thereon, can increase the effective volume of the battery inner chamber when the volume of the battery is constant, thereby increasing the battery capacity, and is used to solve existing problems. In the technology, the thickness of the battery cover plate assembly 11 is relatively thick, resulting in a decrease in the effective volume of the battery inner cavity, which in turn leads to the problem of a small battery capacity.

In the description of the present invention, it should be understood that the terms "comprising", "comprising", "also including" and the like are understood to include the stated components or components without excluding other components or other components. part.

In describing the present invention, it is to be understood that the terms "centre", "length", "width", "thickness", "top", "bottom", "upper", "lower", " "Left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "axial", "circumferential", etc. indicate the orientation or positional relationship based on the drawings The orientations or positional relationships shown are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred position or element must have a specific orientation, with a specific configuration and operation, and therefore cannot be construed as a limitation to the present invention. limit.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation" and so on should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, or Become one; it can be mechanically connected, or electrically connected, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediary, and it can make the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims

A battery housing structure, characterized by comprising: a bottom case and a cover plate assembly, the bottom case and the cover plate assembly jointly enclosing an accommodating chamber;

The cover plate assembly includes a top cover, an insulating part and a conductive part;

The top cover is connected to the top of the bottom case, a through hole is opened on the top cover, the conductive part is arranged on the through hole, and the insulating part is arranged on the top cover and the conductive part Between, wherein, the top cover, the conductive member and the insulating member are of a single-layer structure, and the top cover is hermetically connected to the bottom case.
The battery casing structure according to claim 1, wherein at least one end surface of the insulator has a convex structure or a concave structure;

The end surface of the top cover, the conductive part and the insulating part in contact with each other is a concave structure matched with the convex structure;

Alternatively, the top cover and the end surface on one side where the conductive member and the insulating member are in contact with each other have a convex structure matched with the concave structure.
The battery casing structure according to claim 2, wherein the convex structure or the concave structure is a "V" shape.
The battery casing structure according to any one of claims 1-3, wherein the thickness of the cover plate assembly is >0.08mm.
The battery casing structure according to any one of claims 1-3, wherein the insulating member is connected to the top cover and the end surface of the conductive member.
The battery case structure according to any one of claims 1-3, wherein the material of the top cover and/or the conductive member is stainless steel.
The battery casing structure according to any one of claims 1-3, characterized in that, the width of the insulating member is ≥0.5mm.
The battery casing structure according to any one of claims 1-3, characterized in that, the material of the insulator includes silicon dioxide or ceramics.
The battery casing structure according to any one of claims 1-3, wherein the insulating member is fixedly connected to the top cover and the conductive member by sintering.
A battery, characterized in that it comprises a battery cell assembly and the battery shell structure according to any one of claims 1-9 above, the battery cell assembly is housed in the bottom case, and the cover plate assembly is hermetically connected to the bottom case;

The positive tab of the cell assembly is connected to the bottom case or the top cover, and the negative tab of the cell assembly is connected to a conductive member;

Alternatively, the negative tab of the cell assembly is connected to the bottom case or the top cover, and the positive tab of the cell assembly is connected to the conductive member.