CN213692146U

CN213692146U - Novel lithium battery

Info

Publication number: CN213692146U
Application number: CN202022508017.1U
Authority: CN
Inventors: 侯伟; 侯民; 郭农庆
Original assignee: Jiangxi Lineng New Energy Technology Co ltd
Current assignee: Jiangxi Lineng New Energy Technology Co ltd
Priority date: 2020-11-03
Filing date: 2020-11-03
Publication date: 2021-07-13
Anticipated expiration: 2030-11-03

Abstract

The utility model discloses a novel lithium cell and preparation technology and application thereof belongs to the battery field, and it includes the battery main part, the battery main part is the cylinder type, and its diameter d is: d is more than or equal to 18 and less than 21mm, and the height h is more than or equal to 650 mm. The battery main part includes the casing, sets up the battery core in the casing and fills the electrolyte in the casing, casing bottom inner chamber integrated into one piece has the snap ring, the utility model discloses a novel lithium cell, through setting up not unidimensional battery capacity, more tradition 18650 battery performance obtains improving, has satisfied the performance application on the electric tool simultaneously.

Description

Novel lithium battery

Technical Field

The utility model relates to a battery field, concretely relates to novel lithium cell and manufacturing process and application thereof.

Background

The electric tool has the characteristics of convenience in carrying, simplicity in operation, various functions and the like, can greatly reduce the labor intensity and improve the working efficiency, and is widely applied to the fields of buildings, house decoration, automobiles, machinery, electric power, bridges, gardening and the like, and can enter families in a large quantity.

Cylindrical lithium ion batteries have become the mainstream of electric tool batteries due to the characteristics of consistent model, light and handy structure, small volume, light weight, environmental protection and the like. However, the ordinary 18650 cylindrical lithium ion battery cannot meet the use requirements of electric tools such as an impact electric drill and an electric wrench. The electric tool generates high-strength vibration during operation, and the traditional 18650 battery cannot meet the application requirements of the electric tool.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a novel lithium cell and manufacturing process and application thereof.

The technical solution of the utility model is as follows:

the utility model provides a novel lithium battery, includes battery body, battery body is the cylinder type, and its diameter d is: d is more than or equal to 18 and less than 21mm, and/or the height h is more than or equal to 650 mm.

Preferably, the battery main body comprises a shell, a battery core body arranged in the shell and electrolyte filled in the shell, and a snap ring is integrally formed in an inner cavity at the bottom of the shell.

Preferably, the battery core body comprises a pole piece arranged in a winding manner, the pole piece comprises a coating area located in the middle and foil remaining areas located on two sides of the coating area and used for connecting pole lug positions, a plurality of notches are formed in the edge of the foil remaining area on at least one side, the notches are arranged along the length direction of the pole piece, and when the pole piece is wound into a winding core, the notches are overlapped on the end face of the winding core to form a liquid inlet channel.

Preferably, the notch is any one of a diamond shape, a rectangle shape, a square shape and a triangle shape.

Preferably, the incision depth is 1-5 mm.

Preferably, the edges at two sides of the foil retaining area are provided with a plurality of notches, and the notches at the edges at two sides of the foil retaining area are on the same axis;

and the outer surface of the battery core body is provided with a rubber net layer.

The utility model also discloses a manufacturing process of the novel lithium battery, which comprises the steps of sheet making, winding, shaping, battery shell filling and liquid injection packaging, wherein the sheet making comprises the following steps; coating a gel net layer on the positive plate and/or the negative plate, wherein the gel net layer comprises the following raw materials: a matrix gum and a porous inorganic carbon material.

Preferably, the matrix gum is a thermoplastic elastomer.

Preferably, the raw materials also comprise a flame retardant.

The utility model also discloses an application of the novel lithium battery on the electric tool,

the utility model discloses one of following beneficial effect has at least:

(1) the utility model discloses a novel lithium cell, through setting up not unidimensional battery, its capacity can obtain corresponding improvement, consequently, more traditional battery performance obtains improving, has satisfied the performance application on the electric capacity on the electric tool simultaneously.

(2) The utility model discloses a novel lithium battery, it has a plurality of incisions to distinguish the edge through staying paper tinsel in at least one side, and the incision is arranged along the length direction of pole piece, and a plurality of incisions coincide mutually when the pole piece is convoluteed to roll up the core and form the feed liquor passageway at roll core terminal surface, make and annotate electrolyte can fully soak positive and negative pole piece after the liquid, effectively improve the infiltration effect of positive and negative pole piece.

(3) The utility model discloses a novel lithium battery sets up the snap ring bottom the casing inner chamber, just block into this snap ring department when can making the battery core pack into, do not produce the vibration space, because the vibration appears the short circuit hidden danger in utmost point ear end or pole piece when having solved the later stage and using, has improved the stability of battery performance.

(4) The utility model discloses a novel manufacturing process of lithium cell at a battery core surface coating rubber net layer, can prevent the vibration that the lithium cell produced when using on electric tool on the one hand for it rocks in the casing, causes the short circuit phenomenon, and on the other hand, rubber net layer has certain elasticity, has improved battery core expansion contraction ability, thereby improves its security performance.

(5) The utility model discloses a novel manufacturing process of lithium cell glues interior porous carbon material at the base member, has abundant pore structure on it on the one hand, has the heat accumulation ability, can effectively solve the thermal runaway effect of battery, and its abundant pore structure of on the other hand can make the surface that the coating was glued also can pass through this pore structure with electrolyte rapidly and moisten the pole piece surface.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;

fig. 2 is a schematic structural view of a housing according to a first embodiment of the present invention;

fig. 3 is a first schematic structural diagram of a battery core according to a first embodiment of the present invention;

fig. 4 is a second schematic structural diagram of a battery core body according to the first embodiment of the present invention;

fig. 5 is a third schematic structural diagram of a battery core body in the first embodiment of the present invention;

in the figure, 1-battery body, 2-shell, 3-snap ring, 4-tab, 5-pole piece, 6-notch, 7-adhesive net layer.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does 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.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 to 5, a first embodiment of the present invention:

a novel lithium battery comprises a battery body 1, wherein the battery body 1 is cylindrical, and the diameter d of the battery body is as follows: d is more than or equal to 18mm and less than 21mm, the height h is more than or equal to 650mm, specifically d can be 18mm, 18.1mm, 19mm and 20mm, and h can be 650mm, 700mm and 750 mm.

By providing batteries of different sizes, the capacity of the battery can be correspondingly improved, so that the performance of the battery is improved compared with that of the traditional battery, and the performance application of the electric capacity on the electric tool is met.

As a first embodiment of the present invention, it may also have the following additional technical features:

battery body 1 includes casing 2, sets up the battery core in casing 2 and fills the electrolyte in casing 2, 2 bottom inner chamber integrated into one piece of casing have snap ring 3, just block this snap ring department into when can making the battery core pack into, do not produce the vibration space, because the vibration appears the short circuit hidden danger at utmost point ear end or pole piece when having solved the later stage use, has improved the stability of battery performance.

The battery core body comprises a pole piece 5 which is wound, the pole piece 5 comprises a coating area which is arranged in the middle and foil remaining areas which are arranged on two sides of the coating area and are used for connecting pole lug positions, a plurality of notches 6 are formed in the edge of the foil remaining area on at least one side, the notches 6 are arranged along the length direction of the pole piece 5, when the pole piece 5 is wound into a roll core, the notches are overlapped on the end face of the roll core to form a liquid inlet channel, electrolyte can fully infiltrate the positive pole piece and the negative pole piece after the electrolyte is injected, and the infiltration effect of the positive pole piece and the negative.

The notch 6 is any one of diamond, rectangle, square and triangle, preferably rectangle.

The depth of the incision 6 is 1-5mm, preferably 3 mm.

The edges at two sides of the foil retaining area are provided with a plurality of notches 6, and the notches 6 at the edges at two sides of the foil retaining area are on the same axis;

the battery core body outer surface is provided with a layer of rubber net layer 7, on one hand, can prevent the vibration that the lithium cell produced when using on electric tool for it rocks in casing 2, causes the short circuit phenomenon, and on the other hand, the rubber net layer has certain elasticity, has improved battery core body expansion and contraction ability, thereby improves its security performance.

The utility model discloses the second embodiment is still provided: a novel lithium battery manufacturing process comprises the steps of sheet making, winding, shaping, battery shell filling and liquid injection packaging, wherein the sheet making comprises the following steps; continuously or intermittently coating a gel screen layer 7 on the positive plate and/or the negative plate, wherein the gel screen layer comprises the following raw materials: the porous carbon material in the matrix glue has rich pore structures and heat storage capacity, so that the thermal runaway effect of the battery can be effectively solved, and the rich pore structures can enable the surface of the coating glue to quickly wet the surface of the pole piece with electrolyte through the pore structures.

The matrix glue is a thermoplastic elastomer.

The raw materials also comprise a flame retardant, so that the safety performance of the battery can be improved to a certain extent.

The second embodiment will be further described below for specific embodiments. Specifically, the examples are all adopted; a novel lithium battery comprises a battery body 1, wherein the battery body 1 is cylindrical, and the diameter d of the battery body is as follows: 18mm, height h is the utility model discloses 700 mm.

Example 1

A novel lithium battery manufacturing process comprises the steps of sheet making, winding, shaping, battery shell filling and liquid injection packaging, wherein the sheet making comprises the following steps; coating a gel net layer 7 on the positive plate and/or the negative plate, wherein the gel net layer comprises the following raw materials in parts by weight: 90 parts of matrix glue and 10 parts of porous inorganic carbon material. The matrix adhesive is a thermoplastic elastomer, specifically a thermoplastic polyurethane elastomer, and the porous inorganic carbon material is activated carbon. The raw materials also comprise 1 part of flame retardant, and the flame retardant is triphenyl phosphate.

Example 2

A novel lithium battery manufacturing process comprises the steps of sheet making, winding, shaping, battery shell filling and liquid injection packaging, wherein the sheet making comprises the following steps; coating a gel net layer 7 on the positive plate and/or the negative plate, wherein the gel net layer comprises the following raw materials in parts by weight: 85 parts of matrix glue and 5 parts of porous inorganic carbon material. The matrix adhesive is a thermoplastic elastomer, specifically a thermoplastic polyurethane elastomer, and the porous inorganic carbon material is activated carbon.

Example 3

A novel lithium battery manufacturing process comprises the steps of sheet making, winding, shaping, battery shell filling and liquid injection packaging, wherein the sheet making comprises the following steps; coating a gel net layer 7 on the positive plate and/or the negative plate, wherein the gel net layer comprises the following raw materials in parts by weight: 86 parts of matrix glue and 7 parts of porous inorganic carbon material. The matrix adhesive is a thermoplastic elastomer, specifically a thermoplastic polyurethane elastomer, and the porous inorganic carbon material is activated carbon.

Example 4

The embodiment is a change on the basis of embodiment 2, and specifically, the raw material further comprises 1 part of a flame retardant, and the flame retardant is triphenyl phosphate.

Example 5

The embodiment is a change on the basis of embodiment 2, and specifically, the raw material further comprises 2 parts of a flame retardant, and the flame retardant is triphenyl phosphate.

Comparative example 1

Commercially available 18650 model lithium batteries. (without adhesive net layer)

Comparative example 2 (inorganic carbon Material without porous)

A novel lithium battery manufacturing process comprises the steps of sheet making, winding, shaping, battery shell filling and liquid injection packaging, wherein the sheet making comprises the following steps; and coating a gel screen layer 7 on the positive plate and/or the negative plate, wherein the gel screen layer is made of a thermoplastic polyurethane elastomer.

The examples and comparative examples were subjected to vibration tests by selecting 50 cells per example, continuously vibrating the cells at an amplitude of 2mm and a frequency of 500Hz for 30 hours, and recording the number of dead cells. The results of the experiment are shown in table 1. The failure battery in the test is mainly caused by the phenomenon of short circuit or open circuit caused by the falling of the pole lugs due to vibration.

TABLE 1 number of failed cells after vibration test in examples and comparative examples

As can be seen from the above table, the battery sample of the example continuously vibrates for 30 hours under the conditions of the amplitude of 2mm and the frequency of 500Hz, the failure number does not appear, while the failed battery appears when the comparative example 1 vibrates for 1h under the intensity, and the sample of the comparative example 1 completely fails after vibrating for 2h, which shows that the rubber net layer added in the example can prevent the vibration generated when the lithium battery is applied to an electric tool, so that the lithium battery shakes in the shell to cause a short circuit phenomenon, on the other hand, the rubber net layer has certain elasticity, the expansion and shrinkage capacity of the battery core body is improved, and the safety performance is improved, and meanwhile, the battery capacity of the example is higher than that of the comparative example 1, mainly because the battery size is slightly changed, so that the battery capacity is improved; it can be known from the comparative analysis of comparative example 2 that the battery capacity of the embodiment is higher than that of comparative example 2, mainly because the activated carbon is added in the gel network layer in the embodiment, on one hand, the gel network layer has abundant pore structures and heat storage capacity, the thermal runaway effect of the battery can be effectively solved, the service life of the battery is prolonged, on the other hand, the abundant pore structures can enable the surface of the coating gel to rapidly wet the surface of the pole piece with the electrolyte through the pore structures, namely, on the one hand, the electrolyte is ensured to rapidly soak the pole piece, the chemical surface energy of the pole piece is improved, and accordingly, the battery capacity of the battery is correspondingly improved.

The above additional technical features can be freely combined and used in superposition by those skilled in the art without conflict.

In the description of the embodiments of the present invention, it should be understood that "-" and "-" indicate the same range of two numerical values, and the range includes the end points. For example: "A-B" means a range of greater than or equal to A and less than or equal to B. "A to B" means a range of not less than A and not more than B.

In the description of the embodiments of the present invention, the term "and/or" herein is only one kind of association relationship describing the associated object, and means that there may be three kinds of relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

The above is only the preferred embodiment of the present invention, as long as the technical solution of the purpose of the present invention is realized by the substantially same means, all belong to the protection scope of the present invention.

Claims

1. A novel lithium battery is characterized in that: including battery body (1), battery body (1) is the cylinder type, and its diameter d is: d is more than or equal to 18 and less than 21mm, and/or the height h is more than or equal to 650 mm; battery body (1) includes casing (2), sets up the battery core in casing (2) and fills the electrolyte in casing (2), casing (2) bottom inner chamber integrated into one piece has snap ring (3).

2. A novel lithium battery as claimed in claim 1, characterized in that: the battery core body comprises a pole piece (5) which is wound, the pole piece (5) comprises a coating area located in the middle and foil remaining areas located on two sides of the coating area and used for being connected with pole lug positions, a plurality of notches (6) are formed in the edges of the foil remaining areas on at least one side, the notches (6) are arranged along the length direction of the pole piece (5), and when the pole piece (5) is wound into a winding core, the notches coincide with each other and form a liquid inlet channel on the end face of the winding core.

3. A novel lithium battery as claimed in claim 2, characterized in that: the notch (6) is any one of a diamond shape, a rectangular shape and a triangular shape.

4. A novel lithium battery as claimed in claim 2, characterized in that: the depth of the cut (6) is 1-5 mm.

5. A novel lithium battery as claimed in claim 2, characterized in that: the edges of the two sides of the foil retaining area are provided with a plurality of notches (6), and the notches (6) of the edges of the two sides of the foil retaining area are on the same axis;

and the outer surface of the battery core body is provided with a layer of rubber net layer (7).