CN209561559U - A kind of high security lithium ion battery improving ignition point - Google Patents

Abstract

The utility model discloses a kind of high security lithium ion batteries for improving ignition point, it is related to field of lithium ion battery, it is lower to solve safety coefficient in the prior art, and lithium ion the problem of extremely readily reacting with extraneous oxygen, the inner wall of the plastic cement coated papers is equipped with metal shell, metal is installed above the metal shell to bind, the inner wall of the metal shell is equipped with aluminum hull second, the inner wall of the aluminum hull second is equipped with N-Methyl pyrrolidone layer, the inner wall of the N-Methyl pyrrolidone layer is equipped with aluminum hull first, the inner wall of the aluminum hull first is equipped with lithium-ion electric core, the outer surface of the lithium-ion electric core is equipped with diaphragm, the inner wall of the diaphragm is equipped with electrolyte, the inner wall of the electrolyte is equipped with positive lithium ion polymer graphite battery core, the side of the anode lithium ion polymer graphite battery core Wet process diaphragm is installed.

Description

A kind of high security lithium ion battery improving ignition point

Technical field

The utility model relates to technical field of lithium ion, specially a kind of high security lithium ion for improving ignition point Battery.

Background technique

Lithium ion battery is a kind of secondary cell (rechargeable battery), it relies primarily on lithium ion and moves between a positive electrode and a negative electrode It moves and carrys out work.In charge and discharge process, Li+ insertion and deintercalation back and forth between two electrodes: when charging, Li+ is de- from anode It is embedding, it is embedded in cathode by electrolyte, cathode is in lithium-rich state；Then on the contrary, being infiltrated in the electrolytic solution in positive and negative anodes, lithium when electric discharge Ion moves between positive and negative anodes using electrolyte as medium, realizes the charge and discharge of battery.To avoid positive and negative anodes from sending out by electrolyte Raw short circuit, needs to be separated positive and negative anodes with diaphragm, and has used relatively thin diaphragm, to store more electricity in limited volume Energy.The reduction of thickness increases the production difficulty of diaphragm, easily causes mass defect, prevents diaphragm from being effectively isolated positive and negative anodes, into And causing the short circuit burning and explosion of battery, reason is also that lithium ion can react with oxygen.

But existing lithium ion battery safety coefficient is lower, and lithium ion extremely readily occur with extraneous oxygen it is anti- It answers；Therefore, it is unsatisfactory for existing demand, we have proposed a kind of high security lithium ion batteries for improving ignition point to this.

Utility model content

It is above-mentioned to solve the purpose of this utility model is to provide a kind of high security lithium ion battery for improving ignition point The problems such as safety coefficient proposed in background technique is lower, and lithium ion extremely readily reacts with extraneous oxygen.

To achieve the above object, the utility model provides the following technical solutions: a kind of high security lithium improving ignition point Ion battery, including plastic cement coated papers and oxygen molecule, the inner wall of the plastic cement coated papers are equipped with metal shell, outside the metal Metal is installed to bind above shell, the inner wall of the metal shell is equipped with aluminum hull second, and the inner wall of the aluminum hull second is equipped with N-Methyl pyrrolidone layer, the inner wall of the N-Methyl pyrrolidone layer are equipped with aluminum hull first, the inner wall installation of the aluminum hull first There is lithium-ion electric core, the outer surface of the lithium-ion electric core is equipped with diaphragm, and the inner wall of the diaphragm is equipped with electrolyte, described The inner wall of electrolyte is equipped with positive lithium ion polymer graphite battery core, the side of the anode lithium ion polymer graphite battery core Wet process diaphragm is installed, the side of the wet process diaphragm is equipped with negative electrode lithium ion polymer graphite battery core, the anode lithium from The inner wall of sub- polymer graphite battery core and negative electrode lithium ion polymer graphite battery core is mounted on lithium ion, the lithium-ion electric core Top battery core cover plate is installed, battery core protection board is installed, the battery core covering above the battery core cover plate The end face of panel and battery core protection board side is mounted on relief hole, and the inner wall of the battery core protection board is equipped with anode, described The side of anode is equipped with cathode, and one end of the positive electrode and negative electrode is mounted on conductor, is equipped with heat above the conductor Quick resistance, the side of the thermistor are equipped with insulating trip, injection molding pressing plate are equipped with above the insulating trip.

Preferably, the positive lithium ion polymer graphite battery core and negative electrode lithium ion polymer graphite battery core are set as brilliant Trellis.

Preferably, the end face setting of the thermistor is fluted, and the conductor is connect with thermistor by groove.

Preferably, the outer surface of the metal shell is provided with insulating coating and heatproof coating.

Preferably, the outer surface of the diaphragm fits closely with the inner wall of aluminum hull first and connect.

Preferably, support frame is provided between the aluminum hull second and aluminum hull first.

Compared with prior art, the utility model has the beneficial effects that

1, the utility model is contacted by reducing lithium ion with oxygen molecule, avoids lithium ion and oxygen molecule from carrying out to reduce Generated high temperature when reaction, and the safety of very high battery；

2, the utility model by double-deck aluminum hull first and second and is combined with metal shell, can be good at resisting some points Sharp thing body punctures battery, to improve the overall security of battery；

3, the utility model is all very high by the flash-point and boiling point of N-Methyl pyrrolidone layer, can be when battery is destroyed Particle is carried out to internal lithium ion, even if there are other lithium ions to react with oxygen molecule generation, N- methyl pyrrole will not be lighted The lithium ion of pyrrolidone layer and package, to improve the whole flash-point of battery；

4, the utility model can carry out pressure release because of some expanding gas caused by high temperature to battery by relief hole, avoid Explosion, improves certain safety.

Detailed description of the invention

Fig. 1 is a kind of high security lithium ion battery entirety main view of raising ignition point of the utility model；

Fig. 2 is a kind of high security lithium ion battery entirety sectional view of raising ignition point of the utility model；

Fig. 3 is the lithium-ion electric core partial structural diagram of the utility model；

Fig. 4 is the graphite battery core partial structural diagram of the utility model.

In figure: 1, metal binds；2, plastic cement coated papers；3, it is molded pressing plate；4, thermistor；5, conductor；6, positive；7, it lets out Press hole；8, lithium-ion electric core；9, insulating trip；10, cathode；11, battery core protection board；12, battery core cover plate；13, aluminum hull first； 14, N-Methyl pyrrolidone layer；15, aluminum hull second；16, metal shell；17, positive lithium ion polymer graphite battery core；18, wet process Diaphragm；19, negative electrode lithium ion polymer graphite battery core；20, lithium ion；21, oxygen molecule；22, electrolyte；23, diaphragm.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.

Fig. 1-4 is please referred to, a kind of embodiment provided by the utility model: a kind of high security lithium ion improving ignition point Battery, including plastic cement coated papers 2 and oxygen molecule 21, the inner wall of plastic cement coated papers 2 are equipped with metal shell 16, metal shell 16 Top is equipped with metal and binds 1, and the inner wall of metal shell 16 is equipped with aluminum hull second 15, and the inner wall of aluminum hull second 15 is equipped with N- methyl Pyrrolidones layer 14, the inner wall of N-Methyl pyrrolidone layer 14 are equipped with aluminum hull first 13, the inner wall of aluminum hull first 13 be equipped with lithium from Sub- battery core 8, the outer surface of lithium-ion electric core 8 are equipped with diaphragm 23, and the inner wall of diaphragm 23 is equipped with electrolyte 22, electrolyte 22 Inner wall is equipped with positive lithium ion polymer graphite battery core 17, and the side of positive lithium ion polymer graphite battery core 17 is equipped with wet Method diaphragm 18, the side of wet process diaphragm 18 are equipped with negative electrode lithium ion polymer graphite battery core 19, positive lithium ion polymer stone The inner wall of black battery core 17 and negative electrode lithium ion polymer graphite battery core 19 is mounted on lithium ion 20, the top of lithium-ion electric core 8 Battery core cover plate 12 is installed, can be very good protection lithium-ion electric core 8, the top of battery core cover plate 12 is equipped with battery core The end face of protection board 11, battery core cover plate 12 and 11 side of battery core protection board is mounted on relief hole 7, to the battery after expansion Pressure release is carried out, avoids exploding, the inner wall of battery core protection board 11 is equipped with anode 6, and the side of anode 6 is equipped with cathode 10, anode 6 It is mounted on conductor 5 with one end of cathode 10, the top of conductor 5 is equipped with thermistor 4, and the side of thermistor 4 is equipped with Insulating trip 9, the top of insulating trip 9 are equipped with injection molding pressing plate 3.

Further, positive lithium ion polymer graphite battery core 17 is set as brilliant with negative electrode lithium ion polymer graphite battery core 19 Trellis conducive to the insertion of lithium ion 20, while stopping oxygen molecule 21.

Further, the end face setting of thermistor 4 is fluted, and conductor 5 is connect with thermistor 4 by groove, convenient for peace Assembly and disassembly.

Further, the outer surface of metal shell 16 is provided with insulating coating and heatproof coating, increases safety.

Further, the outer surface of diaphragm 23 fits closely with the inner wall of aluminum hull first 13 and connect, and can be very good to electrolyte 22 are isolated.

Further, it is provided with support frame between aluminum hull second 15 and aluminum hull first 13, battery surface is made to have certain hardness.

Working principle: in use, regardless of positive lithium ion polymer graphite battery core 17 and negative electrode lithium ion polymer graphite Lithium ion 20 inside battery core 19, in acting, is all that can generate certain heat, while lithium ion 20 exists by electrolyte 22 Combustion reaction can be generated when touching oxygen molecule 21, and need to solve is exactly that lithium ion 20 will not be connect with oxygen molecule 21 Touching, it is by electrolyte 22 that lithium ion 20 is fully wrapped around, but when battery is damaged, still can burn and even explode, from And carry out the protection of first layer, while using the property of graphite and be made into lattice shape come carry out storage lithium ion 20, keep away simultaneously When exempting from battery breakage, the lithium ion 20 of storage can be reacted with oxygen molecule 21, and pass through the metal shell 16 of battery surface Prevent damaged protection, and flexible protective is carried out by aluminum hull second 15 and aluminum hull first 13, while allowing N-Methyl pyrrolidone layer 14, in metal shell 16, aluminum hull second 15 and the aluminum hull first 13 for having sharp object to puncture battery surface, carry out in barrier air Oxygen molecule 21 effect, and the end face of battery core protection board 11 and battery core cover plate 12 be provided with relief hole 7, can be good at It prevents battery from expanding under the variation of temperature, and pressure release is carried out to it.

It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting Related claim.

Claims (6)

1. a kind of high security lithium ion battery for improving ignition point, including plastic cement coated papers (2) and oxygen molecule (21), feature Be: the inner wall of the plastic cement coated papers (2) is equipped with metal shell (16), is equipped with gold above the metal shell (16) Category binds (1), and the inner wall of the metal shell (16) is equipped with aluminum hull second (15), and the inner wall of the aluminum hull second (15) is equipped with N- The inner wall of methylpyrrolidone layer (14), the N-Methyl pyrrolidone layer (14) is equipped with aluminum hull first (13), the aluminum hull first (13) inner wall is equipped with lithium-ion electric core (8), and the outer surface of the lithium-ion electric core (8) is equipped with diaphragm (23), it is described every The inner wall of film (23) is equipped with electrolyte (22), and the inner wall of the electrolyte (22) is equipped with positive lithium ion polymer graphite electricity The side of core (17), the anode lithium ion polymer graphite battery core (17) is equipped with wet process diaphragm (18), the wet process diaphragm (18) side is equipped with negative electrode lithium ion polymer graphite battery core (19), the anode lithium ion polymer graphite battery core (17) Be mounted on lithium ion (20) with the inner wall of negative electrode lithium ion polymer graphite battery core (19), the lithium-ion electric core (8) it is upper Side is equipped with battery core cover plate (12), is equipped with battery core protection board (11) above the battery core cover plate (12), described The end face of battery core cover plate (12) and battery core protection board (11) side is mounted on relief hole (7), the battery core protection board (11) inner wall is equipped with positive (6), and the side of the anode (6) is equipped with cathode (10), the anode (6) and cathode (10) One end be mounted on conductor (5), be equipped with thermistor (4) above the conductor (5), the one of the thermistor (4) Side is equipped with insulating trip (9), and injection molding pressing plate (3) is equipped with above the insulating trip (9).

2. it is according to claim 1 it is a kind of improve ignition point high security lithium ion battery, it is characterised in that: it is described just Pole lithium ion polymer graphite battery core (17) and negative electrode lithium ion polymer graphite battery core (19) are set as lattice-like.

3. a kind of high security lithium ion battery for improving ignition point according to claim 1, it is characterised in that: the heat The end face setting of quick resistance (4) is fluted, and the conductor (5) is connect with thermistor (4) by groove.

4. a kind of high security lithium ion battery for improving ignition point according to claim 1, it is characterised in that: the gold The outer surface for belonging to shell (16) is provided with insulating coating and heatproof coating.

5. it is according to claim 1 it is a kind of improve ignition point high security lithium ion battery, it is characterised in that: it is described every The outer surface of film (23) fits closely with the inner wall of aluminum hull first (13) and connect.

6. a kind of high security lithium ion battery for improving ignition point according to claim 1, it is characterised in that: the aluminium Support frame is provided between shell second (15) and aluminum hull first (13).