CN218525614U - Soft-package battery core group capable of sharing electrolyte and large-capacity battery - Google Patents

Abstract

The utility model provides a but soft packet of electric core group and large capacity battery of shared electrolyte mainly solves the current relatively poor problem of a plurality of soft packet of electric core can't realize electrolyte sharing, parallelly connected back uniformity. The soft package battery cell group capable of sharing the electrolyte comprises an electrolyte storage bin and N soft package battery cells; an opening is formed in the soft package battery cell, the electrolyte storage bin is arranged on the N soft package battery cells, and the inner cavity of the electrolyte storage bin is communicated with the openings of the N soft package battery cells; at least one liquid injection port is arranged on the electrolyte storage bin. This soft-packaged electric core group accessible electrolyte stock solution storehouse realizes the electrolyte sharing of a plurality of soft-packaged electric core, makes the inside electrolyte performance of whole parallelly connected soft-packaged electric core group unanimous for uniformity improves after a plurality of soft-packaged electric core are parallelly connected, and the soft-packaged electric core of also being convenient for simultaneously carries out the fluid infusion after the pre-charge grading, thereby has improved the life, production efficiency and the yield of soft-packaged electric core.

Description

Soft-package battery core group capable of sharing electrolyte and large-capacity battery

Technical Field

The utility model belongs to the battery field, concretely relates to can share soft packet of electric core group and large capacity battery of electrolyte.

Background

Lithium ion batteries are mainly divided into three categories, namely square, cylindrical, soft package and the like; the square lithium ion battery and the cylindrical lithium ion battery are mainly made of shells of aluminum alloy, stainless steel and the like, and the soft package lithium ion battery is mainly made of shells formed by coating aluminum plastic films. The packaging material and structure of the soft-packaged cell make it possess a series of advantages. For example, the safety performance is good, and because the soft-packaged battery cell is structurally packaged by an aluminum-plastic film, when a safety problem occurs, the soft-packaged battery cell is blown and cracked, so that the problem of explosion is avoided; the weight is light, and the weight of the soft package battery cell is 20 to 40 percent less than that of a square battery with the same capacity; the internal resistance is small, the internal resistance of the soft package battery cell is smaller than that of a lithium battery, and the self-power consumption of the battery can be well reduced; the cycle performance is good, the cycle life of the soft-package battery cell is longer, and the cycle attenuation of 100 times is 4-7% less than that of an aluminum shell.

Soft-packaged electrical core can vacuum injection electrolyte carry out the pre-charge usually in the manufacturing process, then encapsulates soft-packaged electrical core for have a certain amount of electrolyte in soft-packaged electrical core's the cavity. However, soft-packaged cell's size is generally littleer than square battery's size, and soft-packaged cell can't save a large amount of electrolyte, and the electrolyte in the soft-packaged cell can take place the gasification with positive negative pole piece charge-discharge moreover for electrolyte consumes gradually at the circulation in-process, and this just leads to soft-packaged cell can reduce because of electrolyte and appear that the cycle performance decay is unusual in the circulation later stage, for example, the direct current resistance condition such as increase unusually, thereby has influenced soft-packaged cell's circulation performance.

Chinese patent CN211350866U discloses a soft package cell and a liquid injection system. This soft-packaged electrical core includes electric core main part and has the casing of cavity, electric core main part hold and encapsulate in the cavity, the casing has the intercommunication cavity and external notes liquid hole, be provided with a door structure in annotating the liquid hole, it sets up to open to seal the door structure under the exogenic action annotate the liquid hole and can cancel the shutoff behind the exogenic action annotate the liquid hole. The door structure is sealed through setting up to soft-packaged electrical core for annotate the liquid hole and can open under the exogenic action, be favorable to annotating the liquid machine and in time supply electrolyte at the circulation in-process of soft-packaged electrical core, and seal the door structure and can cancel the shutoff behind the exogenic action, it is good to have guaranteed that soft-packaged electrical core's gas-liquid leakproofness. Although the liquid injection hole of the soft-package battery core can be used for secondary liquid supplement, the electrolyte sharing among a plurality of soft-package battery cores cannot be realized.

Chinese patent CN213752785U discloses a rich liquid soft-package battery cell, rich liquid soft-package battery cell includes the shell and is located the inside electric core of shell, at least one side of electric core is provided with electrolyte storage chamber, can promote the electrolyte injection volume and the liquid retaining volume of soft-package battery cell. Although this laminate polymer core can carry out electrolyte replenishment, its electrolyte of replenishing is quantitative, also can't realize the electrolyte sharing between a plurality of laminate polymer cores simultaneously, leads to parallelly connected back whole battery uniformity relatively poor.

Disclosure of Invention

Can't realize the sharing of electrolyte, the relatively poor problem of parallelly connected back uniformity for solving current a plurality of soft-packaged electrical core, the utility model provides a can share soft-packaged electrical core group and large capacity battery of electrolyte.

In order to achieve the above purpose, the technical scheme of the utility model is that:

a soft package battery cell group capable of sharing electrolyte comprises an electrolyte storage bin and N soft package battery cells, wherein N is a positive integer greater than or equal to 2; an opening is formed in the shell of the soft package battery cell; the electrolyte storage bin is arranged on the N soft-package battery cells, and the inner cavity of the electrolyte storage bin is communicated with the openings of the N soft-package battery cells; the electrolyte liquid storage bin is provided with at least one liquid injection port, and the opening of the liquid injection port and/or the soft package battery cell is sealed and used for realizing electrolyte injection when being opened.

Further, the opening of soft-packaged electrical core realizes sealedly through covering the opening and dissolving the membrane in electrolyte, it is provided with the isolation layer to dissolve one side that the membrane is located soft-packaged electrical core inner chamber, it dissolves when injecting electrolyte in electrolyte stock solution storehouse to dissolve the membrane, and the isolation layer drops, the inner chamber of electrolyte stock solution storehouse and the inner chamber intercommunication of soft-packaged electrical core.

Further, the opening is sealed through the sealing layer, be provided with the weak area on the sealing layer, be provided with the pull ring on the weak area, the inner chamber of electrolyte stock solution storehouse and the inner chamber intercommunication of soft-packaged electrical core when the weak area is opened by the pull ring.

Further, the sealing layer and the shell of the soft package battery cell are integrally arranged.

Further, the bottom in electrolyte stock solution storehouse is provided with logical groove, the inner chamber in electrolyte stock solution storehouse is through leading to the opening intercommunication of groove and soft-packaged electrical core casing.

Further, electrolyte stock solution storehouse is the open hollow cuboid structure of one end, the opening end setting of hollow cuboid structure is in soft-package electricity core open-ended one side, and the lateral wall and the soft-package electricity core sealing connection in electrolyte stock solution storehouse.

Furthermore, the inner cavity of the electrolyte storage bin is provided with a support frame, so that the inner cavity of the electrolyte storage bin is kept smooth, and the support frames are arranged in a grid shape.

Further, be provided with on the electrolyte stock solution storehouse and annotate the liquid pipe, annotate the one end of liquid pipe and annotate liquid mouth intercommunication, the other end is sealed by sealed lid.

Further, a plurality of soft-packaged electrical core arrange in proper order and set up, and a plurality of soft-packaged electrical core's opening setting is in the same position of one side of soft-packaged electrical core, just soft-packaged electrical core's opening and utmost point ear setting are on the different sides of soft-packaged electrical core.

And simultaneously, the utility model also provides a large capacity battery, but including battery case and the above-mentioned soft-packaged electricity core group of sharing electrolyte, soft-packaged electricity core group sets up in the battery case, it has the heat conduction glue to fill between soft-packaged electricity core group and the battery case.

Compared with the prior art, the utility model discloses technical scheme has following advantage:

the utility model discloses but soft-packaged core group of shared electrolyte includes electrolyte stock solution storehouse and N soft-packaged core, is provided with the opening on each soft-packaged core, and electrolyte stock solution storehouse sets up on soft-packaged core, and the inner chamber in electrolyte stock solution storehouse all communicates with the opening of N soft-packaged core; be provided with at least one notes liquid mouth on the electrolyte stock solution storehouse, the opening of annotating liquid mouth and/or soft-packaged electrical core is sealed, is used for realizing that electrolyte pours into when opening. This soft-packaged electrical core group passes through electrolyte liquid storage storehouse and realizes the electrolyte sharing of a plurality of soft-packaged electrical core, makes the inside electrolyte performance of whole parallelly connected soft-packaged electrical core group even unanimous for uniformity improves after a plurality of soft-packaged electrical core connect in parallel, the soft-packaged electrical core of also being convenient for simultaneously carries out the fluid infusion after the pre-charge partial volume, thereby has improved the life of soft-packaged electrical core, production efficiency and yield, and then has improved quality management and control efficiency and battery quality after a plurality of soft-packaged electrical core connect in parallel. In addition, this soft-packaged electrical core group simple structure, the operation is reliable, only need to carry out the opening to soft-packaged electrical core and set up electrolyte stock solution storehouse can, only need open when realizing the electrolyte sharing the opening pour into electrolyte can.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a soft-packaged electric core set capable of sharing electrolyte in embodiment 1 of the present invention;

fig. 2 is a schematic structural view of a dissolving film arranged at an opening of a soft-package battery cell in embodiment 1 of the present invention;

FIG. 3 is a schematic structural view of an electrolyte storage bin provided with an electrolyte injection pipe in embodiment 1 of the present invention;

fig. 4 is a schematic structural view of the through groove provided in the electrolyte storage bin in embodiment 2 of the present invention;

FIG. 5 is a schematic view showing the structure of the electrolyte storage compartment of the present invention with an injection tube;

fig. 6 is a schematic structural view of a pull ring arranged at an opening of a soft-package battery cell in embodiment 2 of the present invention;

fig. 7 is a schematic structural view of the supporting frame provided in the electrolyte storage bin of the embodiment 3 of the present invention.

Reference numerals: 1-soft package battery core, 2-electrolyte storage bin, 3-dissolving film, 4-battery shell, 11-opening, 21-support frame, 22-liquid injection pipe, 23-pull ring and 24-through groove.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments. It should be understood by those skilled in the art that these embodiments are only used for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.

The existing soft package battery cell comprises a shell and an electrode assembly arranged in the shell, wherein the electrode assembly mainly comprises a positive electrode, a negative electrode, a diaphragm, an insulating material and a tab. Generally, the soft-package battery core adopts the aluminum-plastic film as the casing, and the aluminum-plastic film generally uses the heat-seal package to guarantee the gas tightness of the soft-package battery core, and the gas tightness of the soft-package battery core is comparatively critical point, when the soft-package battery core is once injected with liquid or secondary fluid infusion, the contact of aqueous vapor in electrolyte and the air must be prevented. In addition, because each soft-packaged cell is in the course of the work, electrolyte can take place the gasification with positive negative pole piece charge-discharge for electrolyte consumes gradually at the circulation in-process, and each soft-packaged cell can reduce because of electrolyte in the circulation later stage and appear the cycle performance decay unusually, with a plurality of soft-packaged cells back that connects in parallel, each soft-packaged cell's performance has difference to some extent, leads to parallelly connected back uniformity relatively poor, and then influences the performance of whole parallelly connected battery, and on this basis, the utility model provides a can share electrolyte's soft-packaged cell group.

The utility model provides a soft-package battery core group which can share electrolyte, comprising an electrolyte storage bin and N soft-package battery cores; an opening is arranged on the shell of each soft-package battery cell. The electrolyte storage bin is arranged on the soft-package battery cell, and the inner cavity of the electrolyte storage bin is communicated with the openings of the N soft-package battery cells; be provided with at least one on the electrolyte stock solution storehouse and annotate the liquid mouth, annotate the opening of liquid mouth and/or soft-packaged electrical core and sealed, be used for realizing when opening that electrolyte pours into, be used for realizing when opening that electrolyte pours into.

The utility model discloses electrolyte stock solution storehouse can set up in the optional position of soft-packaged electrical core, as long as with the inner chamber intercommunication of soft-packaged electrical core can, preferred, it sets up on the side of not installing soft-packaged electrical core utmost point ear, staggers the setting with utmost point ear promptly, makes things convenient for the injection and the sharing of electrolyte like this, avoids producing with the utmost point ear position of soft-packaged electrical core and interferes.

The utility model discloses electrolyte stock solution storehouse can be the structure of different forms, as long as can store electrolyte and when the opening of soft-packaged electrical core was opened its inner chamber and the inner chamber intercommunication of soft-packaged electrical core can. The electrolyte storage bin can be of a flexible soft package structure or a hard shell structure. For example, the bottom in electrolyte stock solution storehouse is provided with logical groove, and electrolyte stock solution storehouse inner chamber is through leading to groove and soft-packaged cell's opening intercommunication, and perhaps the electrolyte stock solution storehouse is the open hollow cuboid structure of one end, and the opening end setting of hollow cuboid structure is in soft-packaged cell open-ended one side, and the lateral wall and the soft-packaged cell sealing connection in electrolyte stock solution storehouse, adopts the structure of the aforesaid two kinds of differences, is convenient for install with soft-packaged cell, and this kind of structure is more firm. During the concrete connection, the lateral wall in electrolyte stock solution storehouse and soft packet of electric core group are through sealed sealing connection, should set up the leakproofness better, can effectively prevent when electrolyte intercommunication with the aqueous vapor contact in the air, avoid external environment to the influence of electrolyte, it is good to completely cut off the aqueous vapor. If electrolyte stock solution storehouse is flexible soft package structure, flexible soft package structure can adapt to the installation in different spaces because its shape has plasticity, and application range is wider. In addition, for making the inner chamber in electrolyte stock solution storehouse keep unblocked, be provided with the support frame in the inner chamber in electrolyte stock solution storehouse, the support frame is latticed and arranges, this support frame can with electrolyte stock solution storehouse an organic whole set up, also can with the split type setting in electrolyte stock solution storehouse, as long as can support the inner chamber in electrolyte stock solution storehouse can, avoid electrolyte stock solution storehouse to sink the unable electrolyte that flows in subregion.

Soft-packaged electrical core must prevent the contact of electrolyte with aqueous vapor in the air, consequently, need to seal the notes liquid mouth in electrolyte stock solution storehouse or soft-packaged electrical core's opening, perhaps both are sealed, open it when annotating the liquid again. When the liquid injection port of the electrolyte storage bin is sealed, attention needs to be paid to the fact that the electrolyte storage bin does not contain water vapor. The sealing mode of the opening of the soft package battery cell can be various, for example, the opening can be covered by the sealing layer, and the sealing can be realized by a dissolving film dissolved in electrolyte, or the sealing layer can be sealed by the sealing layer, and the sealing layer can be integrally arranged on the shell of the soft package battery. After sealing, the opening means may be various, for example, mechanical opening means or physical dissolution opening means may be used. When mechanical system opened, can set up soft-packaged electrical core in the glove box, cut open soft-packaged electrical core's opening in the glove box, perhaps, be provided with the weak area on the sealing layer, be provided with the pull ring on the weak area, the pull ring is opened in the glove box, and at this moment, the inner chamber of electrolyte stock solution storehouse and the inner chamber intercommunication of soft-packaged electrical core, electrolyte injection realizes the sharing of a plurality of soft-packaged electrical core electrolytes. When opening through mechanical system, need not to change current soft-packaged electrical core's structure, only need set up the pull ring can, consequently, this kind of mode is used in current soft-packaged electrical core. Or, can also be provided with the dissolving film who dissolves in electrolyte in the opening, the one side that dissolving film is located soft-package electricity core inner chamber is provided with the isolation layer, and the opening is opened when dissolving the film and injecting electrolyte in electrolyte stock solution storehouse, with the inner chamber of electrolyte stock solution storehouse and soft-package electricity core's inner chamber intercommunication, when adopting the mode of dissolving the film, need not to operate in the glove box, and this kind of opening mode is simpler, can open the opening when the electrolyte is injected, and the operability is stronger.

Above-mentioned annotate liquid mouth accessible multiple mode and realize sealing, for example the opening that sets up similar to laminate polymer battery sets up the seal membrane, perhaps is provided with again on annotating the liquid opening and annotates the liquid pipe, annotates the setting of liquid pipe can outstanding electrolyte stock solution storehouse, conveniently with the liquid feeding pipe connection, conveniently realizes the injection into of electrolyte. When annotating the liquid mouth and being sealed, can set up sealed lid on annotating the liquid pipe, realize sealed through sealed lid, this sealed lid with annotate the liquid mouth or annotate liquid pipe screw thread, welding or adhesive bonding, also can with annotate liquid mouth, annotate integrative the setting of liquid pipe. When filling electrolyte, sealed lid is lifted off, annotates the liquid mouth or annotates liquid pipe and liquid feeding pipe connection, realizes that electrolyte pours into, and concrete accessible multiple mode realizes annotating the liquid mouth, annotating liquid pipe and liquid feeding pipe connection and realizes, for example accessible screw thread, sticky, mode connection such as interference fit or joint.

When a plurality of above-mentioned soft-packaged electrical core connect in parallel, a plurality of soft-packaged electrical core arrange in proper order and set up, and the opening setting of a plurality of soft-packaged electrical core is in same position, is convenient for set up the dissolving film or is convenient for open through mechanical system fast with the opening setting in same position, also convenient simultaneously and electrolyte stock solution storehouse intercommunication.

The utility model also provides a large capacity battery, including battery case and foretell soft-packaged electricity core group that can share electrolyte, soft-packaged electricity core sets up in the battery case, and it has the heat-conducting glue to fill between soft-packaged electricity core and the battery case, and this heat-conducting glue is silica gel etc..

Example 1

As shown in fig. 1 to fig. 3, the soft-package battery core group of this embodiment includes an electrolyte solution storage bin 2 and N soft-package battery cores 1, each soft-package battery core 1 is provided with an opening 11, the electrolyte solution storage bin 2 is disposed on the soft-package battery core 1, and an inner cavity of the electrolyte solution storage bin 2 is communicated with the openings 11 of the N soft-package battery cores 1; be provided with at least one on electrolyte stock solution storehouse 2 and annotate the liquid mouth, be provided with on annotating the liquid mouth and annotate liquid pipe 22, should annotate liquid pipe 22 and electrolyte stock solution storehouse 2 hot-melt as an organic whole, with two parts hot-melt back as an organic whole, can realize good sealing, isolated aqueous vapor is good. Above-mentioned notes liquid mouth is when filling electrolyte, to annotating liquid pipe 22 cutting, pours into electrolyte into afterwards, realizes the sharing of a plurality of parallelly connected soft packet of electricity core 1 electrolyte. The liquid injection pipe 22 can be connected with the liquid injection pipeline in various ways, specifically, can be connected in ways of thread, gluing, interference fit or clamping and the like.

In this embodiment, electrolyte liquid storage storehouse 2 is the stereoplasm casing, and electrolyte liquid storage storehouse 2 is the open rectangle casing of one end this moment, and the opening end setting of rectangle casing is in soft packet of electric core group opening 11 one side, and the lateral wall and the soft packet of electric core group sealing connection of electrolyte liquid storage storehouse 2, during the concrete connection, the lateral wall and the soft packet of electric core group of electrolyte liquid storage storehouse 2 are through sealed glue sealing connection.

Be provided with the dissolving film 3 who dissolves in electrolyte in the opening 11 of above-mentioned soft-packaged electrical core 1, opening 11 is opened when dissolving film 3 injects the electrolyte in electrolyte stock solution storehouse 2, with the inner chamber of electrolyte stock solution storehouse 2 and soft-packaged electrical core 1's inner chamber intercommunication, annotates liquid electrolyte afterwards and realizes the electrolyte sharing. The dissolution film 3 is made of a material capable of being dissolved in electrolyte, for example, polymethyl methacrylate, polyvinyl chloride, polycarbonate or ABS plastic, etc., in order to prevent the dissolution film 3 from being dissolved in the electrolyte in the battery cell before liquid injection, an isolation layer may be disposed on a side of the dissolution film facing the inner side of the soft package cell, the isolation layer is insoluble in the electrolyte, but can drop off after the dissolution film is dissolved, so that the electrolyte in the battery cell and the electrolyte in the electrolyte storage bin 2 are communicated with each other.

Above-mentioned electrolyte stock solution storehouse 2 can realize the electrolyte sharing of a plurality of soft-packaged electrical core 1 for the uniformity after a plurality of soft-packaged electrical core 1 connect in parallel improves, make the inside electrolyte performance of whole parallelly connected soft-packaged electrical core 1 even unanimous, the soft-packaged electrical core 1 of also being convenient for carries out the fluid infusion after the pre-charge partial volume, the life of battery has been improved, strong operability, economical and practical has improved the production efficiency and the yield of soft-packaged electrical core 1, and then quality management and control efficiency and battery quality after a plurality of soft-packaged electrical core 1 connect in parallel have been improved.

Example 2

As shown in fig. 4 to fig. 6, in the soft-package battery core pack electrolyte storage bin 2 and N soft-package battery cores 1 of the present embodiment, each soft-package battery core 1 is provided with an opening 11; the electrolyte storage bin 2 is arranged on the soft-package battery core group, and the inner cavity of the electrolyte storage bin 2 is communicated with the openings 11 of the N soft-package battery cores 1; be provided with at least one on the electrolyte stock solution storehouse 2 and annotate the liquid mouth, be provided with sealed lid on annotating the liquid mouth for seal electrolyte stock solution storehouse 2, should annotate the liquid mouth when filling electrolyte, sealed lid is lifted off, should annotate liquid mouthful accessible multiple mode and liquid feeding pipe connection, modes such as concrete accessible screw thread, sticky, interference fit or joint are connected.

Above-mentioned soft-packaged electrical core 1's opening 11 is sealed through the sealing layer, adopt mechanical system to open when opening, can adopt the device of cutting to cut the packaging film of soft-packaged electrical core 1 in the glove box, perhaps, be provided with the weak area in the opening 11, if this weak area is the PP membrane, be provided with pull ring 23 on the weak area, pull ring 23 is opened at the glove box, with the inner chamber of electrolyte stock solution storehouse 2 and the inner chamber intercommunication of soft-packaged electrical core 1, pour into electrolyte into afterwards, realize the sharing of a plurality of parallelly connected soft-packaged electrical core 1 electrolytes.

This embodiment electrolyte liquid storage storehouse 2 is the stereoplasm casing, and the bottom of electrolyte liquid storage storehouse 2 is provided with logical groove 24 this moment, and 2 inner chambers of electrolyte liquid storage storehouse are through leading to groove 24 and the 11 intercommunications of opening of soft-packaged electrical core 1, and when opening 11 was opened through mechanical means, the electrolyte in the electrolyte liquid storage storehouse 2 was through leading to groove 24 inflow soft-packaged electrical core 1's inner chamber, realized the sharing of the two electrolyte. Alternatively, after the openings 11 are opened, the internal environment of the battery box is pumped by-40 mmHg to form a pressure difference between the inner and outer layers of the cell casing, and the openings 11 in the cell casing are further expanded by the pressure difference of the negative pressure pumping. And after the negative pressure suction is finished, the electrolyte is recharged. Therefore, the battery cores are ensured to be soaked in the electrolyte together, and the interior of the battery core and the internal environment of the battery box are communicated into a whole. Further ensures that each battery cell has the same electrical property, the same working environment and the same electrolyte soaking environment, thus ensuring the consistency of the electrical property and the working condition of all the battery cells and greatly prolonging the service life of the large-capacity battery.

Example 3

The soft-package battery core group comprises an electrolyte liquid storage bin 2 and N soft-package battery cores 1, wherein an opening 11 is formed in each soft-package battery core 1, the electrolyte liquid storage bin 2 is arranged on each soft-package battery core 1, and inner cavities of the electrolyte liquid storage bins 2 are communicated with the openings 11 of the N soft-package battery cores 1; be provided with at least one on electrolyte stock solution storehouse 2 and annotate the liquid mouth, be provided with on annotating the liquid mouth and annotate liquid pipe 22, should annotate liquid pipe 22 and electrolyte stock solution storehouse 2 hot-melt as an organic whole, with two parts hot-melt back as an organic whole, can realize good sealing, isolated aqueous vapor is good. This annotate liquid mouth when annotating electrolyte, will annotate sealed lid on the liquid pipe 22 and pull down, inject electrolyte afterwards, realize the sharing of a plurality of parallelly connected soft packet of electricity core 1 electrolyte.

As shown in fig. 7, this embodiment electrolyte stock solution storehouse 2 is flexible soft package structure, and during the concrete joint, the side and the soft packet of electric core group in electrolyte stock solution storehouse are through sealed glue sealing connection. In addition, for making the inner chamber in electrolyte stock solution storehouse keep unblocked, be provided with support frame 21 in the electrolyte stock solution storehouse, support frame 21 is latticed arranging, this support frame 21 can with 2 integrative settings in electrolyte stock solution storehouse, also can with 2 split type settings in electrolyte stock solution storehouse, as long as can support the inner chamber in electrolyte stock solution storehouse 2 can, avoid the unable electrolyte that flows in electrolyte stock solution storehouse partial region of collapsing.

Example 4

As shown in fig. 1 and fig. 4, the present embodiment provides a large-capacity battery, which includes a battery case 4 and the above-mentioned soft-package electric core set capable of sharing electrolyte, the soft-package electric core set is disposed in the battery case 4, and a heat-conducting glue is filled between the soft-package electric core set and the battery case 4. The high-capacity battery is mainly formed by connecting a plurality of selected soft package battery cores 1 with the same electrical property in parallel, before each soft package battery core 1 forming the high-capacity battery is grouped, the electric capacity, the internal resistance and the charge-discharge characteristic are tested, and the error of three parameters of each soft package battery core 1 can enter the same group to be matched within 1%. And (3) laminating a plurality of selected soft package battery cores 1 with the same electrical property (ignoring selection errors), pressing by using a pressing plate, and bundling and pressing by using a bundling belt. Set up laminate polymer core in the battery case afterwards, open laminate polymer core's opening 11 in the glove box, put into the battery case with it, add electrolyte in the battery case afterwards, electrolyte in the battery case and laminate polymer core 1 inside electrolyte realization intercommunication this moment for every laminate polymer core 1 all soaks jointly in the electrolyte of the internal environment of battery case, thereby increase substantially the uniformity of 1 energy storage performance of each laminate polymer core, and improve the life of each laminate polymer core 1.

During specific installation, after the soft-package battery cell is arranged in the battery shell, silica gel is filled around the soft-package battery cell and on the bottom surface of the soft-package battery cell. In the glove box, open the opening 11 at 1 top of all soft-packaged electrical core, with electrolyte stock solution storehouse bottom fluting, place electrolyte stock solution storehouse on electric core opening 11, make the fluting coincidence of electric core opening 11 and electrolyte stock solution storehouse, with gluing carry out reliable sealing and encapsulation with electrolyte stock solution storehouse all around, treat the sealed glue solidification back, inject electrolyte in giving the electrolyte stock solution storehouse, electrolyte in the electrolyte stock solution storehouse just with the electrolyte intercommunication of the inside of soft-packaged electrical core 1, at this moment, can supply electrolyte to soft-packaged electrical core 1, and simultaneously, still can realize a plurality of soft-packaged electrical core electrolyte sharing. After electrolyte liquid storage storehouse inner chamber and 1 inner chamber intercommunication of laminate polymer core, with large capacity battery reversal 180 degrees for under the initial condition, be located the bottom of the electrolyte liquid storage storehouse playback battery at battery top, normal during operation, the side in electrolyte liquid storage storehouse is whole to be irritated the tie by silica gel, comes heat conduction and pressure-bearing through embedment silica gel.

Claims (10)

1. The soft-package battery core group capable of sharing the electrolyte is characterized by comprising an electrolyte storage bin and N soft-package battery cores, wherein N is a positive integer greater than or equal to 2;

an opening is formed in the shell of the soft package battery cell;

the electrolyte storage bin is arranged on the N soft-package battery cells, and the inner cavity of the electrolyte storage bin is communicated with the openings of the N soft-package battery cells;

be provided with at least one notes liquid mouth on the electrolyte stock solution storehouse, the opening of annotating liquid mouth and/or soft-packaged electrical core is sealed, is used for realizing that electrolyte pours into when opening.

2. The soft-package battery core assembly capable of sharing electrolyte according to claim 1, wherein the opening of the soft-package battery core is sealed by a dissolving film covering the opening and dissolved in the electrolyte, an isolating layer is arranged on one side of the dissolving film positioned in the inner cavity of the soft-package battery core, the dissolving film is dissolved when the electrolyte is injected into the electrolyte in the electrolyte storage bin, and the isolating layer falls off, and the inner cavity of the electrolyte storage bin is communicated with the inner cavity of the soft-package battery core.

3. The soft-package battery core capable of sharing electrolyte according to claim 1, wherein the opening is sealed by a sealing layer, a weak area is arranged on the sealing layer, a pull ring is arranged on the weak area, and the inner cavity of the electrolyte storage bin and the inner cavity of the soft-package battery core are communicated when the weak area is opened by the pull ring.

4. The electrolyte-sharable, soft-packaged battery core pack of claim 3, wherein said sealing layer is integral with said soft-packaged battery cell housing.

5. The soft-packaged battery core group capable of sharing electrolyte according to claim 1, wherein the bottom of the electrolyte storage bin is provided with a through groove, and the inner cavity of the electrolyte storage bin is communicated with the opening of the soft-packaged battery core shell through the through groove.

6. The soft-package battery core group capable of sharing electrolyte according to claim 1, wherein the electrolyte storage bin is a hollow cuboid structure with one open end, the open end of the hollow cuboid structure is arranged on one open side of the soft-package battery core, and the side wall of the electrolyte storage bin is connected with the soft-package battery core in a sealing manner.

7. The soft-packaged electric core set capable of sharing electrolyte according to any one of claims 1 to 6, wherein a support frame is arranged in the inner cavity of the electrolyte storage bin, so that the inner cavity of the electrolyte storage bin is kept smooth, and the support frames are arranged in a grid shape.

8. The soft-packaged electric core group capable of sharing electrolyte according to any one of claims 1 to 6, wherein an electrolyte injection pipe is arranged on the electrolyte storage bin, one end of the electrolyte injection pipe is communicated with the electrolyte injection port, and the other end of the electrolyte injection pipe is sealed by a sealing cover.

9. The soft-package battery core group capable of sharing electrolyte according to any one of claims 1 to 6, wherein the plurality of soft-package battery cores are arranged in sequence, the openings of the plurality of soft-package battery cores are arranged at the same position of the same side of the soft-package battery core, and the opening and the tab of the soft-package battery core are arranged on different sides of the soft-package battery core.

10. A large capacity battery, characterized in that, includes battery case and any one of claims 1 to 9 the soft package electric core group of shareable electrolyte, soft package electric core group sets up in battery case, it has the heat conduction glue to fill between soft package electric core group and the battery case.

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