CN220774472U - Sealed unpacking mechanism, single battery and high-capacity battery - Google Patents

Abstract

The utility model discloses a sealed unpacking mechanism, a single battery and a large-capacity battery, wherein the sealed unpacking mechanism is used for sealing and unpacking the single battery; the sealing unpacking mechanism comprises a mechanism main body, wherein the mechanism main body comprises a fixed plate, an isolation assembly and a dissolving plate; the fixed plate is fixedly provided with a dissolving plate, the isolation assembly is positioned between the fixed plate and the dissolving plate, and the fixed plate is provided with a first through hole; the isolation assembly comprises an isolation film and a tensioning rope which is arranged at the edge of the isolation film and used for expanding or contracting the isolation film; the dissolving plate is provided with a U-shaped accommodating groove; and one part of the tensioning rope on the isolation film is embedded into the U-shaped accommodating groove, and the other part of the tensioning rope is connected to the fixed plate, so that the isolation film is in an unfolding state and covers the first through hole. The sealing and unpacking mechanism is simple and convenient to install, and the communication between the electrolyte cavity of the single battery and the shared electrolyte cavity of the high-capacity battery can be realized without mechanical operation.

Description

Sealed unpacking mechanism, single battery and high-capacity battery

Technical Field

The utility model relates to the technical field of lithium batteries, in particular to a sealing and unpacking mechanism, a single battery and a high-capacity battery.

Background

In existing lithium battery applications, the use of very large capacity batteries is often involved. The current large-capacity single square lithium battery in the market is 300Ah, the single cylindrical battery with the maximum capacity is not more than 100Ah, the influence of the capacity of the single battery is avoided, a plurality of single batteries are required to be connected in parallel to achieve the required capacity requirement when the lithium battery is used for energy storage, a plurality of groups of battery cells are required to be connected in parallel when the large-capacity lithium battery is manufactured, but each single battery in the existing large-capacity battery has differences, the existence of the cask effect is often influenced by one single battery with the worst performance, the capacity upper limit and the circulation times of the whole large-capacity battery are greatly limited, and therefore, the uniformity of each single battery in the large-capacity battery is improved to be the key point and the difficulty of research in the field.

In order to solve the problem of poor uniformity of each single battery in a large-capacity battery, chinese patent CN115275543a discloses a lithium battery case, which comprises a case opening and a dissolution component, wherein the dissolution component comprises a dissolution base layer, when the dissolution base layer contacts with an electrolyte, the dissolution base layer is dissolved, the case opening is opened, and the inner cavity of the battery case is communicated with the outside. That is, in the patent, a plurality of single batteries with the shell are placed in the shared electrolyte cavity of the high-capacity battery, and as the electrolyte is filled in the shared electrolyte cavity, after the dissolution component of the opening of the shell is dissolved, the electrolyte of the high-capacity battery flows into the single batteries, so that the sharing communication of the electrolyte cavities of all the single batteries is realized, the electrolytes of all the single batteries are in a uniform state, and the battery difference is reduced, thereby improving the consistency and stability of the batteries. The dissolution assembly of this patent is secured to the housing opening by means of heat staking, in particular: the electromagnetic induction device is arranged on the dissolution layer, the electromagnetic induction device is started, the electromagnetic induction is conducted to the metal ring, the metal ring instantaneously heats, the modified polypropylene is melted when meeting heat, and the melted modified polypropylene is used for bonding and fixing the metal ring, the shell body and the dissolution component, so that the dissolution component is fixed on the shell body.

However, according to actual operation, the existing method is complicated in operation, so that the assembly efficiency is not high.

Disclosure of Invention

It is an object of the present utility model to provide a sealed unpacking mechanism that solves at least the above-mentioned problems and/or disadvantages and that provides at least the advantages described below.

The utility model provides a sealing and unpacking mechanism which is used for sealing and unpacking single batteries; the sealing unpacking mechanism comprises a mechanism main body, wherein the mechanism main body comprises a fixed plate, an isolation assembly and a dissolving plate;

the fixed plate is fixedly provided with a dissolving plate, the isolation assembly is positioned between the fixed plate and the dissolving plate, and the fixed plate is provided with a first through hole;

the isolation assembly comprises an isolation film and a tensioning rope which is arranged at the edge of the isolation film and used for expanding or contracting the isolation film;

the dissolving plate is provided with a U-shaped accommodating groove;

and one part of the tensioning rope on the isolation film is embedded into the U-shaped accommodating groove, and the other part of the tensioning rope is connected to the fixed plate, so that the isolation film is in an unfolding state and covers the first through hole.

Further, a clamping groove is formed in the fixing plate, and the other part of the tensioning rope is fixedly arranged in the clamping groove.

Further, the fixed plate is of a rectangular frame structure.

Further, the sealed bag opening mechanism further comprises a fixed frame, the fixed frame is provided with a second through hole, and the mechanism main body is fixed in the fixed frame and covers the second through hole.

The utility model also provides a single battery, which comprises a shell and an electrode assembly accommodated in the shell; the shell comprises an upper cover plate, a lower cover plate and a cylinder body, wherein an opening is formed in the lower cover plate, and at least one sealing bag opening mechanism adopting any one of the above is arranged on the opening.

In another aspect of the present utility model, a high-capacity battery is provided, including a hollow member and a plurality of the foregoing unit cells arranged in parallel; the hollow member comprises a box body with one end open and a sealing cover covering the open end of the box body;

the box wall of the box body far away from the open end is welded with the opening part of each single battery, which is correspondingly provided with a sealing unpacking mechanism, and the box body is provided with a third through hole corresponding to the sealing unpacking mechanism.

The utility model has the beneficial effects that:

1. the sealing and unpacking mechanism comprises a fixed plate, an isolation assembly and a dissolving plate, wherein the isolation assembly is positioned between the fixed plate and the dissolving assembly, a first through hole is formed in the fixed plate, the isolation assembly comprises an isolation film and a tensioning rope which is arranged at the edge of the isolation film and used for enabling the isolation film to be unfolded or contracted, the first through hole is covered, after the dissolving assembly is dissolved by electrolyte, the isolation assembly does not cover the first through hole any more, external electrolyte flows into an internal battery, the isolation film is still fixed by the fixed plate due to the traction effect of the tensioning rope, the isolation film is prevented from entering a single battery cell, the position of the isolation film in the battery cannot be controlled, unpredictable influence on the battery is generated, and the influence on the battery can be reduced to the greatest extent.

2. The sealing bag opening mechanism is simple in structure, does not need to use external tools, and is convenient to install.

Additional advantages, objects, and features of the utility model 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 utility model.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a main body structure of a sealing and unpacking mechanism;

FIG. 2 is a schematic diagram of a side clamping groove structure of the sealing and unpacking mechanism;

FIG. 3 is a schematic structural view of a sealed unpacking mechanism with a fixed frame;

FIG. 4 is a schematic diagram of a cell structure with a sealed unpacking mechanism;

fig. 5 is a schematic view of a structure of a large-capacity battery having a hollow member.

Reference numerals:

1-a sealed unpacking mechanism; 12-a mechanism body; 121-a fixed plate; 122-isolation assembly; 123-dissolving plate; 124-a first via; 125-a separation membrane; 126-tensioning the rope; 128-U-shaped accommodation groove; 129-clamping groove; 13-fixing the frame; 14-second through holes, 15-side walls; 16-boss; 2-single battery; 21-a housing; 22-an upper cover plate; 23-a cylinder; 24-opening; 25-a lower cover plate; 3-a hollow member; 31-sealing cover; 32-a box body; 33-third through holes.

Detailed Description

The present utility model is described in further detail below with reference to the drawings to enable those skilled in the art to practice the utility model by referring to the description.

Example 1

As shown in fig. 1 and fig. 2, in an embodiment of the sealing and unpacking mechanism according to the present utility model, the sealing and unpacking mechanism includes a mechanism main body 12, the mechanism main body 12 includes a fixing plate 121, an isolation assembly 122 and a dissolving plate 123, the dissolving plate 123 is fixed on the fixing plate 121, the isolation assembly 122 is disposed between the fixing plate 121 and the dissolving plate 123, a first through hole 124 is disposed in the middle of the fixing plate 121 and is used for flowing in an electrolyte, 2 clamping grooves 129 are disposed at the edge of the fixing plate 121, a U-shaped receiving groove 128 is circumferentially disposed at the dissolving plate 123, the isolation assembly 122 includes an isolation film 125 and a circle of tensioning ropes 126 circumferentially disposed, a part of the tensioning ropes 126 is penetrated into the edge of the isolation film 125, and another part of the tensioning ropes 126 extends out of the isolation film 125, so that the isolation film 125 can be contracted by the tensioning ropes 126. The U-shaped receiving groove 128 is provided in a form corresponding to that of the tension cord 126.

When the isolating membrane 125 is assembled, the isolating membrane 125 is unfolded, the tensioning rope 126 in the isolating membrane 125 is placed in the U-shaped accommodating groove 128, and the other part of the tensioning rope 126 extends out of the isolating membrane 125, and is fixed on the fixing plate 121 through the clamping groove 129. Finally, the dissolving plate 123 is adhered to the fixing plate 121, and the separation film 125 covers the first through hole.

In this embodiment, the dissolving plate 123, the separation film 125, the fixing plate 121 and the first through hole 124 are rectangular. In use, these components may also be of other shapes, for example, circular or square, etc., as long as it is able to satisfy that the isolation film 125 covers the first through hole of the fixing plate 121, the isolation film 125 is between the dissolving plate 123 and the fixing plate 121, and the fixing of the dissolving plate 123 on the fixing plate 121 is within the scope of protection of this patent.

The tensioning rope 126 penetrates through the isolating membrane 125, can be positioned at the edge of the isolating membrane 125, can be positioned in the middle of the isolating membrane 125, or penetrates through the isolating membrane 125 in a Z shape, and the clamping groove 129 on the fixing plate 121 can be one or a plurality of clamping grooves, so long as the clamping grooves are arranged to enable the tensioning rope 126 to be fixed on the fixing plate 121 and meet the requirement of covering the first through hole after the isolating membrane is unfolded.

Example 2

Further, as shown in fig. 3, in order to facilitate the sealing performance of the sealing and unpacking mechanism of the assembling machine, the sealing and unpacking mechanism 1 comprises a mechanism main body 12 and a fixing frame 13 of embodiment 1, wherein the mechanism main body 12 is formed and installed in the same manner as in embodiment 1, a second through hole 14 is formed in the fixing frame 13, a side wall 15 is circumferentially arranged in the fixing frame 13, the side wall 15 is enclosed into an accommodating space for accommodating the mechanism main body 12, the assembled mechanism main body 12 is placed in the fixing frame 13, the second through hole 14 is covered, glue is applied along the joint of the mechanism main body 12 and the fixing frame 13, the side wall 15 is bent inwards, and the mechanism main body 12 is fixed in the fixing frame 13.

Further, in order to facilitate the installation, a circle of boss 16 is circumferentially arranged on the fixing frame 13 along the inside of the side wall 15, the mechanism main body 12 is adhered to the boss 16, and then the side wall 15 is buckled inwards.

Example 3

As shown in fig. 2 to 4, a single battery 2 is shown, the single battery 2 includes a case 21 and an electrode assembly accommodated therein, the case 21 includes an upper cover 22, a lower cover 25 and a cylinder 23, an opening 24 is provided on the lower cover 25, and the sealing and unpacking mechanism 1 of embodiment 1 or embodiment 2 is fixedly mounted on the opening 24 by welding.

The installation procedure is that, first, the sealing and unpacking mechanism 1 is assembled, when the sealing and unpacking mechanism is the embodiment 1, namely, the sealing and unpacking mechanism only comprises the mechanism main body 12, the isolating membrane 125 is unfolded, the tensioning rope 126 in the isolating membrane 125 is placed in the U-shaped accommodating groove 128 of the dissolving plate 123, the other part of the tensioning rope 126 extends out of the isolating membrane 125, and the part is fixed on the fixing plate 121 through the clamping groove 129 of the fixing plate 121. Finally, the dissolving plate 123 is bonded or welded to the fixing plate 121, and the separation film 125 covers the first through hole 124.

When the sealed unpacking mechanism is embodiment 2, that is, the sealed unpacking mechanism comprises a mechanism main body 12 and a fixing frame 13, the mechanism main body 12 is installed in the mode of installing embodiment 1, then the mechanism main body 12 is adhered and installed on the fixing frame 13, the side wall 15 is buckled inwards, and the mechanism main body 12 is fixed.

When the battery cell 2 is mounted, the lower cover plate 25 of the battery cell 2 is placed upward in the glove box, and the side of the sealed and unpacked mechanism 1 having the separator 122 faces the inside of the battery cell, and the side having the dissolution plate 123 is away from the battery opening 24. The sealed-unpacking mechanism 1 is welded at the opening 24 so that the sealed-opening mechanism 1 seals the opening 24.

When the sealed electrolyte packaging machine is used, when the outside of the opening 24 of the single battery 2 is contacted with electrolyte, the dissolving plate 123 of the sealed electrolyte packaging machine 1 is soaked in the electrolyte, and as the dissolving plate 123 is soluble in the electrolyte, the dissolving plate is gradually dissolved by the electrolyte, the tensioning rope 126 is not fixed by the dissolving plate 123 any more, the isolating membrane 125 is folded towards one side of the clamping groove 129 under the elastic action of the tensioning rope 126, the isolating membrane 125 does not cover the first through hole 124 any more, and the external electrolyte flows into the single battery 2 through the first through hole 124, the second through hole 14 and the opening 24.

Example 4

As shown in fig. 5, the high-capacity battery comprises a plurality of parallel-connected single batteries 2 and a hollow member 3, wherein the hollow member 3 comprises a box 32 and a sealing cover 31, the sealing cover 31 is covered on the box 32 to form a cavity capable of containing electrolyte, an opening 24 is formed in a lower cover plate 25 of the single battery 2, a sealing unpacking mechanism 1 is fixedly welded on the opening 24, the sealing unpacking mechanism 1 is in the structure of embodiment 1 or embodiment 2, in the embodiment, the sealing unpacking mechanism 1 is in the structure of embodiment 2, an isolation assembly 122 of a mechanism main body 12 in the sealing unpacking mechanism 1 faces the inside of the single battery 2, one surface with a dissolving plate 123 is far away from the inside of the single battery 2, and a plurality of third through holes 33 are formed in the bottom surface of the box 32 of the hollow member 3. During installation, the lower cover plate 25 of the single battery 2 is firstly placed upwards in a glove box, the sealing and unpacking mechanism 1 is welded at the opening 24, the sealing and unpacking mechanism 1 seals the opening 24, then a plurality of installed single batteries are taken out of the glove box, the plurality of single batteries 2 and the hollow member 3 are installed, during installation, the third through holes 33 on the box body 32 of the hollow member 3 are sealed and welded with the opening 24 of each single battery, and after welding, the sealing cover 31 is welded on the box body 32, so that the installation of the large-capacity battery is completed.

After the installation of the hollow member 3 and the single battery 2 is completed, when the battery pack is used, electrolyte is injected into the hollow member 3, as the sealing unpacking mechanism 1 is installed at the opening 24 of the shell of the single battery 2, the dissolving plate 123 of the sealing unpacking mechanism 1 faces the cavity of the hollow member 3, as the material of the dissolving plate 123 is soluble in the electrolyte, after the dissolving plate 123 is dissolved by the electrolyte, the isolating membrane 125 is not fixed on the dissolving plate 123, the isolating membrane 125 is tightened towards one side of the fixed plate 121 under the elastic action of the tensioning rope 126, the first through hole 124 is not covered by the isolating membrane 125, and as part of the tensioning rope 126 is fixed by the fixed plate 121, the isolating membrane 125 cannot flow into the single battery 2 along with the electrolyte, so that the influence on the single battery cell is reduced. The first through-hole 124 is opened, the second through-hole 14, the third through-hole 33, and the opening 24 are penetrated, and the electrolyte in the hollow member 3 flows into the inside of each unit cell 2, forming the electrolyte sharing of the unit cells.

All the single batteries are in a common electrolyte system, so that the influence of the difference of battery performances of the single batteries on the performance of the whole large-capacity battery due to different electrolyte consumption is avoided, and the performance of the whole large-capacity battery is improved.

In the utility model, the material of the dissolving plate is one of polystyrene, TPU (thermoplastic polyurethane elastomer), ABS plastic, ASA (acrylic acid, styrene and acrylonitrile copolymer) and SMMA (styrene dimethyl methyl acrylate copolymer), and the materials can be dissolved in electrolyte, and the dissolution speed of each material in the electrolyte is different, so that the proper material can be selected according to the use occasion and the requirement of the battery.

In the utility model, the isolating film is made of polypropylene or polyethylene. Polypropylene or polyethylene is insoluble in the electrolyte, so that sealing of the first through hole can be achieved.

It will be understood that terms, such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

The terms "first" and "second" and the like in the description of embodiments of the present utility model are used for distinguishing between different objects and not for describing a particular sequential order of objects. For example, the first and second blocks, etc. are used to distinguish between different blocks, and are not used to describe a particular sequence of blocks.

In the description of the embodiments of the present utility model, unless otherwise indicated, the meaning of "a plurality" means two or more. For example, a plurality of elements refers to two elements or more than two elements.

The term "and/or" herein is an association relationship describing an associated object, and means that there may be three relationships, for example, a display panel and/or a backlight, and may mean: there are three cases where the display panel alone exists, the display panel and the backlight exist at the same time, and the backlight exists alone. The symbol "/" herein indicates that the associated object is or is a relationship, e.g., input/output indicates input or output.

In embodiments of the utility model, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g." in an embodiment should not be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

Although embodiments of the utility model have been disclosed above, they are not limited to the use listed in the specification and embodiments. It can be applied to various fields suitable for the present utility model. Additional modifications will readily occur to those skilled in the art. Therefore, the utility model is not to be limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.

Claims (6)

1. The sealing and unpacking mechanism is used for sealing and unpacking the single batteries; the method is characterized in that: the sealing unpacking mechanism comprises a mechanism main body, wherein the mechanism main body comprises a fixed plate, an isolation assembly and a dissolving plate;

the fixed plate is fixedly provided with a dissolving plate, the isolation assembly is positioned between the fixed plate and the dissolving plate, and the fixed plate is provided with a first through hole;

the isolation assembly comprises an isolation film and a tensioning rope which is arranged at the edge of the isolation film and used for expanding or contracting the isolation film;

the dissolving plate is provided with a U-shaped accommodating groove;

and one part of the tensioning rope on the isolation film is embedded into the U-shaped accommodating groove, and the other part of the tensioning rope is connected to the fixed plate, so that the isolation film is in an unfolding state and covers the first through hole.

2. The sealed bag opening mechanism according to claim 1, wherein the fixing plate is provided with a clamping groove, and the other part of the tensioning rope is fixedly arranged in the clamping groove.

3. The sealed bag opening mechanism of claim 2, wherein the fixed plate is a rectangular frame structure.

4. The sealed bag opening mechanism according to claim 3, further comprising a fixing frame provided with a second through hole, wherein the mechanism body is fixed in the fixing frame and covers the second through hole.

5. A single battery includes a case and an electrode assembly accommodated in the case; the shell comprises an upper cover plate, a lower cover plate and a cylinder body, and is characterized in that an opening is formed in the lower cover plate, and at least one sealing bag opening mechanism according to any one of claims 1-4 is arranged on the opening.

6. A high-capacity battery comprising a hollow member and a plurality of the unit cells according to claim 5 arranged in parallel; the hollow member comprises a box body with one end open and a sealing cover covering the open end of the box body;

the box wall of the box body far away from the open end is welded with the opening part of each single battery, which is correspondingly provided with a sealing unpacking mechanism, and the box body is provided with a third through hole corresponding to the sealing unpacking mechanism.