CN116581392B

CN116581392B - Tray structure and battery production equipment

Info

Publication number: CN116581392B
Application number: CN202310856478.3A
Authority: CN
Inventors: 魏鹏飞; 羿庄城; 黄彩虾; 施企明; 汪志明
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2023-07-13
Filing date: 2023-07-13
Publication date: 2024-04-02
Anticipated expiration: 2043-07-13
Also published as: CN116581392A

Abstract

The invention relates to the technical field of battery manufacturing, and particularly discloses a tray structure and battery production equipment, wherein the tray structure comprises a tray main body and at least two bag bodies, the tray main body is of a hollow structure and is provided with an inlet communicated with the inside and the outside fluid, the at least two bag bodies are arranged on the tray main body at intervals along a first direction, the opposite surfaces of each two adjacent bag bodies can be deformed, each bag body is provided with a bag cavity capable of being filled with a fluid medium, the cavity wall of the bag cavity is provided with a bag opening communicated with the inside of the tray main body, and a battery monomer is placed between the two adjacent bag bodies. According to the technical scheme, the fluid channel can be formed through the structure of the tray main body, so that the structure is simplified, and the assembly is convenient.

Description

Tray structure and battery production equipment

Technical Field

The invention relates to the technical field of battery manufacturing, in particular to a tray structure and battery production equipment.

Background

The lithium ion battery has high energy density and wide application range. The formation process is a process of activating the battery core to form an SEI film (Solid Electrolyte Interphase, solid electrolyte phase interface film) by adopting a certain charge-discharge mode. Gas can be generated in the formation process, and the gas needs to be discharged in time in the SEI film formation process, so that the lithium ion channel is ensured not to be blocked by bubbles. In the formation process in the related art, the whole structure is complex and the production efficiency is low in the process of discharging the gas.

Disclosure of Invention

The invention mainly aims to provide a tray structure which is simple in structure and convenient to assemble.

In order to achieve the above object, the tray structure according to the present invention includes:

the tray body is of a hollow structure and is provided with an inlet for communicating the interior with external fluid; and

at least two sacs are arranged on the tray main body at intervals along the first direction, the opposite surfaces of the two adjacent sacs can be deformed, each sac is formed with a sac cavity capable of being filled with fluid medium, the cavity wall of each sac cavity is provided with a sac opening communicated with the inside of the tray main body, and a battery monomer is placed between the two adjacent sacs.

The tray structure comprises a tray main body and at least two bag bodies, wherein the bag bodies are introduced into the tray main body through fluid media to enable the surfaces of the bag bodies to be deformed and expanded, so that the extrusion and exhaust functions of the battery monomers are formed. Through set up the tray main part to hollow structure and offered the import with hollow inside intercommunication, can make the tray main part itself as a cavity that leads to fluid medium for fluid medium gets into by the import, and through the inside space flow direction of tray main part at least two bag mouths of bag body and bag chamber, thereby realize the extrusion and dismantle battery monomer, need not to change a plurality of battery monomer's pressurization position, also need not to increase extra fluid pipeline, make overall structure simple clean and tidy, save the process of equipment pipeline, effectively promote packaging efficiency and production efficiency.

Therefore, the tray main body is used as a cavity for flowing fluid medium, so that the structure can be simplified, and the assembly efficiency and the production efficiency can be improved; and the flexible of the bag body can be more attached to the surface of the battery monomer, so that the uniformity of extrusion force is improved, the gas exhaust effect in the battery monomer is improved, and the phenomenon of black spot lithium precipitation at the interface is solved.

In an embodiment of the present application, the bag body includes a frame body and a flexible cover disposed on at least one surface of the frame body, the flexible cover and the frame body enclose to form the bag cavity, and the frame body is mounted on the tray main body.

Here, through rigid support body and flexible cover, can be when promoting the stability of bag body structure, apply flexible extrusion force to the battery monomer, promote extrusion effect.

In an embodiment of the present application, the bag port is connected with a vent valve, and the vent valve is detachably connected with the tray main body and is communicated with the interior of the tray main body.

Here, the rate of fluid ingress or egress within the bladder may be controlled by the provision of the vent valve and the tightness of the connection may be improved.

In an embodiment of the present application, the two surfaces of the frame body are both provided with the flexible covers, and the two flexible covers and the frame body enclose to form the bag cavity.

Here, both surfaces all set up flexible envelope to make the bag body both sides all can extrude the battery monomer, promote the utilization ratio of tray structure.

In an embodiment of the present application, the connection mode of the flexible cover and the frame body is bonding or plugging.

Here, flexible envelope can promote connection stability and leakproofness through the mode of bonding, and the mode of pegging graft can conveniently be changed.

In an embodiment of the present application, the material of the flexible cover is rubber or memory cotton;

and/or the frame body is made of engineering plastics.

Here, the flexible envelope of above-mentioned material has better wearability and ageing resistance, promotes the performance of bag body. The frame body of engineering plastic can improve the structural strength and high temperature resistance of the frame body so as to prolong the service life. And the material cost is low, so that the processing cost can be effectively reduced.

In an embodiment of the present application, the battery cells are provided with at least two, at least two battery cells are arranged in an array at least in the second direction, and two adjacent battery cells are arranged between the two adjacent capsules and used for simultaneously clamping at least two battery cells arranged side by side along the second direction.

Here, with two adjacent bag body correspondence centre gripping two battery monomers side by side, compare in the holder of current two components of a whole that can function independently structures, can further simplify the structure, realize the pressurization structure of integration, convenient equipment promotes the space utilization of tray structure.

In an embodiment of the present application, a partition member is connected to the middle of the frame body, and the partition member divides the capsule cavity into two non-communicating sub-cavities, where each sub-cavity is communicated with one of the capsule openings.

Here, set up the partition piece and can divide into two with the bag body and exert pressure the district, and two district that exert pressure do not communicate, can not influence each other to promote the accuracy of exerting pressure to every battery monomer.

In one embodiment of the present application, half of the area of the flexible cover is greater than or equal to the area of the largest face of one of the battery cells.

Here, flexible envelope can take place deformation extrusion battery monomer under fluidic medium's effect, because an extrusion piece corresponds two battery monomers, so make its half area be greater than the area of battery monomer's biggest face, can make each position of battery monomer all receive extrusion exhaust, further promotes the exhaust effect.

In an embodiment of the present application, a boss is disposed on one side of the frame body along a direction perpendicular to the first direction and the second direction, and the boss is used for abutting against at least a portion of one side of the battery cell.

Here, the setting of boss can promote the stability to the centre gripping of battery monomer, prevents that the battery monomer from landing.

In an embodiment of the application, the tray main body is a frame body and is provided with a mounting cavity with two open sides, the bag body is mounted in the mounting cavity, and the bag opening is formed in the end part of the bag body abutting against the cavity wall of the mounting cavity.

Here, the frame body structure can limit and fix the end part of the bag body, so that the installation stability is improved; and the arrangement of the bag opening position can reduce the connecting path between the bag body and the tray main body, thereby further simplifying the structure.

In an embodiment of the present application, at least two mounting grooves are formed on the wall of the mounting cavity, and one end of the bag body is inserted into one of the mounting grooves.

Here, insert the bag body and locate the mounting groove in, convenient equipment just can provide stable spacing effect.

In an embodiment of the present application, the wall of the mounting cavity is convexly provided with a plurality of protrusions, and two adjacent protrusions enclose to form one mounting groove.

Here, through protruding structure formation mounting groove that establishes, can promote the spacing stability to the utricule, and avoid fluting and influence inside ventilation channel in the tray main part.

In an embodiment of the present application, the installation groove is provided with a plurality of installation grooves, a plurality of installation grooves are respectively provided at intervals on two opposite cavity walls of the installation cavity, and two ends of each of the bag bodies are respectively inserted into one of the installation grooves.

Here, through two mounting grooves and a bag body cooperation grafting, further promote the installation stability of bag body.

In an embodiment of the present application, a number of mounting grooves provided on a cavity wall of the mounting cavity is greater than a number of the capsules, so that a distance between two capsules can be adjusted by replacing positions of the capsules.

Here, through the grafting position of adjusting the bag body, the space size that the power supply monomer was placed is changed, promotes the suitability.

In an embodiment of the present application, a through hole is formed at a bottom of the mounting groove, and the through hole is communicated with an inside of the tray main body and is communicated with the bag opening.

Here, the communicating position is provided at the bottom of the installation groove, so that the communicating path is further reduced, the pipe body is not required to be provided, and the structure is further simplified.

In an embodiment of the present application, the tray structure further includes a bottom plate, the bottom plate is connected to one side of the tray main body, and covers an opening of the mounting cavity, and the bottom plate is used for propping against a side edge of the battery cell.

Here, the stability of the tray structure can be further improved by supporting the battery cells by the bottom plate.

The invention also provides battery production equipment comprising the tray structure.

Drawings

In order to more clearly illustrate the embodiments of the present invention 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, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an embodiment of a tray structure according to the present invention;

FIG. 2 is a top view of the tray structure of FIG. 1;

FIG. 3 is a front view of the tray structure shown in FIG. 1;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a schematic view of an embodiment of a tray body in the tray structure of the present invention;

FIG. 6 is a schematic diagram of one embodiment of a bladder in a tray structure according to the present invention;

fig. 7 is a longitudinal cross-sectional view of the bladder of fig. 6.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				10	Tray structure	2	Bag body
1	Tray main body	2a	Bag cavity
				1a	Air flow channel	21	Frame body
11	Inlet port	211	Bag mouth
				12	Mounting cavity	212	Boss
13	Protrusions	22	Flexible cover
				131	Mounting groove	23	Partition piece
132	Through hole	3	Vent valve

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout is meant to include three side-by-side schemes, for example, "a and/or B", including a scheme, or B scheme, or a scheme that is satisfied by both a and B. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

The batteries mentioned in the art can be classified into disposable batteries and rechargeable batteries according to whether they are rechargeable or not. The types of rechargeable batteries that are currently common are: lead acid batteries, nickel hydrogen batteries, and lithium ion batteries. The lithium ion battery as a rechargeable power battery has the advantages of high energy, high battery voltage, wide working temperature range, long storage life and the like. Are currently widely used in electronics and electric vehicles, and are becoming increasingly popular in military and aerospace applications.

The battery described in the embodiments of the present application refers to a rechargeable battery. Hereinafter, embodiments disclosed herein will be described mainly by taking lithium ion batteries as examples. It should be appreciated that the embodiments disclosed herein are applicable to any other suitable type of rechargeable battery. The batteries mentioned in the embodiments disclosed in this application may be used directly or indirectly in a suitable device to power the device.

Reference to a battery in embodiments of the present disclosure refers to a single physical module that includes one or more battery cells to provide a predetermined voltage and capacity. The battery cell is a basic unit in the battery, and the processing process of the battery cell comprises the steps of firstly forming a positive pole piece, a negative pole piece, electrolyte and a separation film into a battery cell shape, and then performing procedures of shell entering, welding, formation and the like. The lithium ion battery cell mainly relies on movement of lithium ions between the positive electrode sheet and the negative electrode sheet. Generally, the packaging method can be divided into: cylindrical battery cells, cuboid battery cells and soft package battery cells. Hereinafter, it will be mainly developed around the rectangular parallelepiped battery cells. It should be understood that the embodiments described hereinafter are also applicable in certain respects to cylindrical battery cells or pouch battery cells.

In the lithium ion battery production process, a formation process is an important step, and the formation is mainly a process of charging the battery core for the first time so as to activate the lithium ion battery; in the process, a solvent in the electrolyte and lithium salt undergo side reaction, a layer of solid electrolyte phase interface film, namely an SEI film, is formed on the negative electrode of the lithium ion battery, and the quality of the SEI film directly influences the cycle life, stability, self-discharge and other electrical properties of the battery core. At the same time, the solvent and part of the additives in the electrolyte can be reduced or decomposed to cause serious gas generation in the battery. If the gas generated by formation cannot be discharged in time, on one hand, the battery is swelled, the group margin is reduced, the electrolyte in the battery cannot completely infiltrate the negative electrode, small dry black spots without lithium intercalation are formed at the insufficiently infiltrated position, lithium is separated out from the periphery of the black spots, on the other hand, lithium ions separated out from the positive electrode are easy to produce lithium separation around bubbles, and the electrical performance of the battery is further affected.

In order to slow down the influence of gas on the battery, the related art has the problem that the cell is vacuumized through a negative pressure formation process in the formation process, but the negative pressure vacuuming equipment has high cost. The GAP between the electrode plates is pressed by a mechanical clamp or a deformation capsule body to prevent the gas from being discharged in time, however, the former has a large number of structural parts, and a butt joint error exists in the pressing process, so that the formation process is not facilitated. The latter then needs to arrange a plurality of pipelines around the electric core and ventilate or lead to other medium, and the equipment is loaded down with trivial details, along with the increase of electric core quantity, can need more pipelines to be in parallel the back again and converge, occupy certain tray space, lead to overall structure to have redundant part to make production efficiency low.

Therefore, in order to solve the problem that the battery monomer is not well limited and butted due to the use of a mechanical clamp for disassembly and assembly in the related art, the formation process is affected; and the pipeline of the exhaust mode of the bag body can lead to the problems of complicated and redundant overall structure and low production efficiency. Through setting up the tray structure and directly restricting the free utricule to need not to dismantle repeatedly, and the tray main part sets up to hollow structure, thereby make itself form the runner of leading to the medium, need not parts such as extra increase pipeline, can effectively reduce the occupation in space, simplify the structure, promote packaging efficiency and production efficiency.

The tray structure disclosed by the embodiment of the application can be applied to battery production equipment, namely, in a scene of multiple procedures requiring pressurizing of the battery cells, for example, a formation machine; the device can also be applied to battery testing equipment, such as a capacity machine, and plays a role in restraining lithium battery cells and/or exhausting.

Referring to fig. 1 to 4, the present application provides a tray structure 10, the tray structure 10 includes a tray main body 1 and at least two capsules 2, the tray main body 1 is a hollow structure, and is provided with an inlet 11 for communicating the inside with the outside fluid, at least two capsules 2 are arranged on the tray main body 1 along a first direction at intervals, the opposite surfaces of every two adjacent capsules 2 are deformable, each capsule 2 is formed with a capsule cavity 2a capable of being filled with a fluid medium, the cavity wall of the capsule cavity 2a is provided with a capsule opening 211 communicated with the inside of the tray main body 1, and a battery monomer is placed between two adjacent capsules 2.

The tray body 1 refers to a member that provides a mounting base for the pouch 2, which may also be used to carry battery cells, or to carry battery cells through the pouch 2. The tray structure 10 may be a flat tray, a frame structure, or a box structure, which is not limited herein. The tray main body 1 may be integrally formed, or may be assembled by splicing. The tray body 1 may be made of metal, plastic, inorganic nonmetal, wood, or the like.

The tray main body 1 has a hollow structure, that is, a fluid passage for passing fluid is formed therein, and the fluid passage may occupy all positions of the tray main body 1, or may be formed only in a part of the structure, and is not limited thereto, and may be set as needed. The tray body 1 is provided with an inlet 11, and the inlet 11 is connected to a liquid or gas supply device so as to supply a desired fluid to the inside thereof.

The capsule 2 is a flexible container which can be filled with a medium and is elastically deformed by the compressibility and/or flowability of the medium. The balloon 2 herein includes, but is not limited to, a balloon and a fluid balloon. When the balloon 2 is an air bag, the deformation can be realized by adjusting the medium filled in the balloon cavity 2a through the balloon opening 211, and the medium can be air, inert gas or nitrogen, for example, the inflation enlarges the balloon 2, and the exhaust reduces the contraction of the balloon 2. Deformation can also be realized by changing the state change of the medium in the capsule body 2, for example, the temperature is raised to lead the water in the capsule body 2 to be gasified, the expansion of the capsule body 2 is increased, the temperature is lowered to lead the steam to be condensed, and the contraction of the capsule body 2 is reduced. The liquid medium filled in the liquid sac can be water or oil. The first direction may be a longitudinal extending direction of the tray main body 1 or a width direction, and is not limited herein. The bag body 2 can be of a whole flexible structure or a part of flexible structure, namely, the surfaces of the two bag bodies 2 facing each other are flexible. The capsule body 2 can be an integrally formed structure or can be formed by assembling a plurality of parts.

The bag body 2 is mounted on the tray main body 1, can be positioned on the tray main body, can be embedded in the tray main body, can be detachably connected in a connecting mode, can be of an integrated structure, and can be indirectly connected with the tray main body 1 through other parts, such as a supporting seat and the like.

The battery monomer is extruded through setting up the bag body 2, when charging and discharging the battery monomer, the single volume of battery can take place to expand and shrink, and simultaneously bag body 2 can take place self-adaptation elastic deformation according to the single shape of battery to make the surface of bag body 2 remain throughout to the extrusion on single surface of battery, improve the crowd margin of single compression of battery. The inlet 11 is used to fill the fluid medium into the capsule cavity 2a through the capsule opening 211 when the battery cells need to be extruded, and the capsule cavity 2a is kept empty or filled with a small amount of the fluid medium when the battery cells are loaded and unloaded, so that the battery cells can be taken out and placed conveniently. Meanwhile, the extrusion force of the capsule body 2 on the battery monomer is adjusted, so that poor appearance such as concave outer shell of the battery monomer due to overlarge stress of the battery monomer or lithium precipitation due to overlarge stress of the battery monomer is avoided.

The tray structure 10 includes a tray main body 1 and at least two capsules 2, wherein the capsules 2 can be deformed and expanded by introducing a fluid medium into the capsules 2, so as to form an extrusion and exhaust function for the battery cells. Through setting up tray main part 1 to hollow structure and offered the import 11 with hollow inside intercommunication, can make tray main part 1 itself be as a cavity that leads to fluid medium for fluid medium gets into by import 11, and through the inside space flow direction of tray main part 1 at least two bag mouths 211 and the bag chamber 2a of bag body 2, thereby realize the extrusion and the dismantlement to battery monomer, need not to change a plurality of battery monomer's pressurization position, also need not to increase extra fluid pipeline, make overall structure simple and clean, save the process of equipment pipeline, effectively promote packaging efficiency and production efficiency.

Therefore, the tray main body 1 is used as a cavity for flowing fluid media, so that the structure of the bag body 2 can be simplified, the flow of the single battery recombination tray is simplified, the assembly efficiency and the production efficiency are improved, and the productivity and the logistics line planning are improved. And the flexible of the bag body 2 can be more attached to the surface of the battery monomer, so that the uniformity of extrusion force is improved, the gas discharge effect in the battery monomer is improved, and the phenomenon of black spot lithium precipitation at the interface is solved.

Referring to fig. 6 and 7, in an embodiment of the present application, the bag 2 includes a frame 21 and a flexible cover 22 disposed on at least one surface of the frame 21, the flexible cover 22 and the frame 21 enclose a bag cavity 2a, and the frame 21 is mounted on the tray main body 1.

The frame 21 is a rigid structure, and can support, but is not limited to, metal, plastic, inorganic nonmetal, wood, or the like. It is possible to have better connection strength and stability when it is mounted with the tray main body 1. The frame body 21 can enclose and form certain space, and this space has an at least opening, and a surface that is located the frame body 21 is covered in an opening part to enclose with the frame body 21 and close and form the bag chamber 2a, this flexible cover 22 is the structure that carries out the butt with the battery monomer, and the frame body 21 provides the installation basis for flexible cover 22 can obtain stretching, better butt and extrusion battery monomer also makes the stability of bag body 2 promote. The frame 21 may be an integrally formed structure, or may be formed by a hollow or concave plate.

The flexible cover 22 is a member through which a medium is difficult to pass and which can be deformed, and the material of the flexible cover 22 may be one of silica gel, cowhide, rubber or latex, and the connection manner with the frame 21 may be fixed connection or detachable connection, which is not limited herein. The pocket 211 may be formed in the frame 21 or may be formed at one end of the flexible cover 22, which is not limited herein.

Through rigid support body 21 and flexible envelope, can be when promoting the stability of bag body 2 structure, exert flexible extrusion force to the battery monomer, promote extrusion effect.

With continued reference to fig. 7, in an embodiment of the present application, two surfaces of the frame 21 are provided with flexible covers 22, and the two flexible covers 22 and the frame 21 enclose a pocket 2a.

In an example, the frame 21 is a square frame structure, the structure has two openings, and the two surfaces of the frame 21 are respectively provided with a flexible cover 22, so that the flexible covers 22 cover the two openings, and the frame 21 and the two flexible covers 22 enclose to form a bag cavity 2a, so that deformable structures are formed on two sides of the bag 2, and the battery cells can be extruded at the same time, thereby improving the utilization rate of the tray structure 10. In other examples, the frame 21 may be two split structures, each split structure has a space with one open end, and forms a cavity 2a with a flexible cover 22, that is, the cavity 2 may form two split cavities 2a, so that the two cavities do not affect each other.

Referring to fig. 6, in an embodiment of the present application, a vent valve 3 is connected to the bag port 211, and the vent valve 3 is detachably connected to the tray main body 1 and communicates with the interior of the tray main body 1.

In this example, the bag body 2 is an air bag, and the medium introduced into the bag cavity 2a is air, and the ventilation valve 3 is a valve body with a control gas flow or a switch, so that the extrusion force of each bag body 2 on the battery cell can be controlled. Optionally, the ventilation valve 3 is a one-way valve, and the air is introduced into the capsule cavity 2a through the tray main body 1, but the air cannot flow out from the capsule opening 211, so that the tray structure 10 can be separated from an air source when restraining the battery monomer, and the capsule body 2 can still continuously extrude the battery monomer, so that the tray structure 10 can be conveniently transferred on different stations. And the setting of check valve can also confirm the gas volume that fills to the bag intracavity 2a through time and velocity of flow, and then better control to the extrusion dynamics of battery monomer. When it is desired to release the gas, the ports 211 may be opened, or two ports 211 may be provided, one for inflation and the other for deflation.

In other examples, the ventilation valve 3 may be a two-way valve, which can be used for filling gas inwards to squeeze, or releasing gas to release restraint on the battery cell, so that only one bag opening 211 is provided to realize inflation and deflation, and the structure is simple. Because the ventilation valve 3 has better sealing performance, the ventilation valve 3 is used for communicating the tray body with the bag opening 211, so that the speed of fluid entering or discharging in the bag body 2 can be controlled, the sealing performance of the joint can be improved, and the fluid utilization rate is improved.

In one embodiment of the present application, the flexible cover 22 is attached to the frame 21 by bonding or plugging.

In an example, the connection mode between the flexible cover 22 and the frame 21 may be bonding, for example, through glue or solid glue, so as to achieve connection between the two, and the connection mode may promote connection stability of the flexible cover 22 installed on the frame 21, and may also promote tightness, prevent leakage of medium, and promote stability of exhaust of the battery unit. In other examples, the flexible cover 22 may be connected to the frame 21 in a plugging manner, for example, the frame 21 is in a frame structure, a slot is formed at an edge of an opening of the frame, and a peripheral side of the flexible cover 22 is inserted into the slot to realize connection.

In one embodiment of the present application, the flexible cover 22 is made of rubber or memory cotton;

and/or the frame 21 is made of engineering plastic.

Here, the flexible cover 22 may be made of rubber, which has better wear resistance and aging resistance, improves the service performance of the bladder body 2, and has low material cost, so that the processing cost of the tray structure 10 can be reduced. In other examples, the flexible cover 22 may also be memory cotton, with good terrain-varying compression.

On the basis of limiting or not limiting the material of the flexible cover 22, the material of the frame body 21 can be engineering plastics, wherein the engineering plastics can be polyimide, polyphenyl ether resin, polyether ether ketone or the like which are resistant to high temperature and are not easy to deform, polypropylene or high-density polyethylene or the like with high mechanical strength, and the structural strength and high-temperature resistance of the bag body 2 can be improved so as to prolong the service life. And the plastic is light, so that the weight of the tray structure 10 can be reduced, and the transfer is convenient. Meanwhile, the materials are easy to process and acquire, the cost is low, and the processing cost can be effectively reduced.

Referring to fig. 1 and fig. 2, in an embodiment of the present application, at least two battery units are provided, at least two battery units are arranged in an array at least in the second direction, and two adjacent capsules 2 are used for simultaneously clamping at least two battery units arranged side by side along the second direction.

Here, the battery cells are arranged in an array at least in the second direction, which means that the battery cells are provided with a plurality of battery cells, and the plurality of battery cells are arranged at intervals in the second direction, namely in a straight-line array, or are arranged at intervals in both the second direction and the first direction, so as to form a two-dimensional array. Two adjacent two cell bodies 2 are correspondingly clamped, namely, the surface of one cell body 2 is correspondingly abutted against and extruded with the surface of the largest surface of the two adjacent cell bodies, compared with the existing two cell bodies, the cell body 2 can be further simplified in structure, an integrated pressurizing structure is realized, and the space utilization rate of the tray structure 10 is further improved.

Referring to fig. 6 and 7, in an embodiment of the present application, a partition member 23 is connected to a middle portion of the frame 21, and the partition member 23 divides the capsule 2a into two non-communicating sub-cavities, each of which is connected to a capsule opening 211.

In an example, the material of the partition member 23 may be the same as that of the frame 21, and may be an integrally formed structure with the frame 21, thereby improving the structural strength. In other examples, the partition 23 may be detachably connected to the frame 21. Here, the partition member 23 may divide the bladder body 2 into two separate chambers which are not communicated, and one example is to set the flexible cover 22 into two separate structures, wherein one part of the flexible cover corresponds to the frame body 21 and the partition member 23 to form a separate chamber, and the other part corresponds to the frame body 21 and the partition member 23 to form another separate chamber. Alternatively, the flexible cover 22 is a unitary structure that covers a surface of the frame 21 and is simultaneously connected to the partition 23, thereby forming two separate chambers.

Each of the sub-chambers is communicated with one of the bag openings 211, so that fluid is introduced into the two bag openings 211 through the tray main body 1 and flows into the two sub-chambers respectively. The two bag openings 211 may be disposed on opposite sides of the frame 21, and may be two sides in the second direction, or two sides in directions perpendicular to the first direction and the second direction.

Here, the partition member 23 divides the bladder cavity 2a into two pressing areas, one pressing area is correspondingly abutted against each battery cell, and the two pressing areas are not communicated, so that the pressing of the two pressing areas on the battery cells can be not affected by each other, and the accuracy of pressing each battery cell is improved.

In one embodiment of the present application, the half area of the flexible cover 22 is greater than or equal to the area of the largest face of a battery cell.

Here, the area of the flexible cover 22 refers to the surface area of the flexible cover 22 facing the other pocket 2, and the area of half of the flexible cover 22 refers to the area of half of the flexible cover 22 in the second direction. The flexible cover 22 can deform to squeeze the battery cells under the action of the fluid medium, and as one flexible cover 22 corresponds to two battery cells, namely half of the area corresponds to one battery cell, the half of the area is larger than the largest surface area of one battery cell, all positions of the battery cells can be squeezed and exhausted, and the exhaust effect is further improved.

In an example, the interval formed between two adjacent capsules 2 can be slightly larger than the thickness of the battery monomer, so that when the battery monomer is conveniently placed between the two capsules 2, extrusion and exhaust can be performed by only introducing a small amount of fluid, the usage amount of the fluid is reduced, and the restraint and release efficiency can be improved.

Referring to fig. 6 again, in an embodiment of the present application, a boss 212 is disposed on one side of the frame 21 along a direction perpendicular to the first direction and the second direction, and the boss 212 is used to abut against at least a portion of one side of the battery cell.

Adjacent two capsules 2 extrude the surface of the battery cell through two surfaces perpendicularly, in order to further improve the stability of the support of the battery cell, here, a boss 212 is convexly arranged on one side of the frame 21, the boss 212 can support the battery cell in the direction perpendicular to the first direction and the second direction, for example, the first direction is the left-right direction, the second direction is the front-back direction, and the boss 212 supports the battery cell in the vertical direction. The boss 212 may be a plurality of bumps or a protruding strip, and extends along the extending direction of the frame 21, so as to improve the supporting stability. The boss 212 can improve the stability of clamping the battery cell and prevent the battery cell from sliding down.

Referring to fig. 4 and 5, in an embodiment of the present application, the tray main body 1 is a frame body, and is formed with a mounting cavity 12 with two open sides, the bag body 2 is mounted in the mounting cavity 12, and the bag opening 211 is formed at an end of the bag body 2 abutting against a cavity wall of the mounting cavity 12.

Here, the tray main body 1 is provided in a frame structure, and the frame is enclosed to form a certain space. For example, the tray main body 1 is a square frame body, a mounting cavity 12 with two open sides is formed around the square frame body, the frame body is of a hollow structure, that is, an inlet 11 is formed on one side of the frame body, and fluid can flow to the other side of the frame body along the extending direction of the frame body through the inlet 11 and flow into each capsule cavity 2a through the capsule opening 211. The capsule body 2 is arranged in the mounting cavity 12, two ends of the capsule body 2 are correspondingly abutted against two opposite side walls of the mounting cavity 12, and the end part of the capsule body 2 can be limited and fixed, so that the mounting stability is improved. The arrangement of the bag opening 211 at the position can reduce the connecting path between the bag body 2 and the tray main body 1, and further simplify the structure. In other examples, the pocket 211 may be formed in the middle of the frame 21, and may be abutted by extending out of the tray main body 1.

With continued reference to fig. 5, in an embodiment of the present application, the wall of the mounting cavity 12 is formed with at least two mounting grooves 131, and one end of a capsule 2 is inserted into one of the mounting grooves 131.

Here, the mounting groove 131 may be formed by grooving the wall of the mounting cavity 12, or may be formed by recessing the wall of the mounting cavity 12, or the mounting groove 131 may be formed by an additional structure, which is not limited herein. The end part of the bag body 2 is inserted into the mounting groove 131, on one hand, the bag body can be limited in the extending direction of the bag body 2, and on the other hand, the bag body can be limited in the thickness direction of the bag body 2, namely in the first direction, so that the mounting stability of the bag body 2 is improved, extrusion deformation of a battery monomer after expansion is prevented, and on the other hand, the mounting mode is convenient and fast, and the assembly efficiency can be further improved. Alternatively, one end of the capsule 2 is inserted into the mounting groove 131, and the other end abuts against the wall of the mounting cavity 12.

In an embodiment of the present application, the wall of the mounting cavity 12 is convexly provided with a plurality of protrusions 13, and two adjacent protrusions 13 enclose to form a mounting groove 131.

Here, a mounting groove 131 is formed by two protrusions 13, so the structure of at least two mounting grooves 131 requires at least four protrusions 13. When the number of the mounting grooves 131 is plural, the number of the protrusions 13 is plural. The protrusion 13 may be integrally formed with the tray body 1. For example, when both are plastic, they may be formed by integral injection molding. In other examples, the protrusions 13 may be connected by welding or bonding, or by a detachable connection. The shape of the protrusion 13 may be a rectangular parallelepiped, a square, or other shapes, and is not limited thereto, as long as a fitting groove 131 that limits the end of the capsule 2 can be formed. The mounting groove 131 is formed through the protruding 13 structure, so that the limiting stability of the bag body 2 can be improved, the phenomenon that the internal ventilation channel is influenced due to the fact that the tray body 1 is grooved or concavely arranged is avoided, and the stability and the flow speed of fluid are improved.

Referring to fig. 4 and 5, in an embodiment of the present application, a plurality of mounting grooves 131 are provided, the plurality of mounting grooves 131 are respectively disposed on two opposite chamber walls of the mounting chamber 12 at intervals, and two ends of each bag 2 are respectively inserted into one mounting groove 131.

To improve stability, two mounting grooves 131 are respectively inserted at two ends of each capsule 2, that is, at least four mounting grooves 131 are required for at least two capsules 2. Through two mounting grooves 131 and a bag body 2 cooperation grafting to promote the spacing homogeneity of bag body 2, further promote the installation stability of bag body 2.

In an embodiment of the present application, the number of the mounting grooves 131 provided on one cavity wall of the mounting cavity 12 is larger than the number of the capsules 2, so that the distance between the two capsules 2 can be adjusted by replacing the positions of the capsules 2.

Here, the number of the mounting grooves 131 of one chamber wall of the mounting chamber 12 being greater than the number of the capsules 2 means that the number of the mounting grooves 131 is greater than the number of the capsules 2 when the capsules 2 are limited by one end being mounted with the mounting grooves 131; when the capsule body 2 is mounted with the mounting grooves 131 through both ends, the number of the mounting grooves 131 is twice larger than that of the capsule body 2, that is, the number of the mounting grooves 131 of one cavity wall is larger than that of the capsule body 2. So, can make this tray structure 10 have the mounting groove 131 structure of surplus, can change the space size that the power supply monomer was placed through adjusting the grafting position of the bag body 2 to can match the battery monomer of different thickness, promote the suitability.

In other examples, the number of the mounting grooves 131 formed in one wall of the mounting chamber 12 is equal to the number of the capsules 2, and the size of the space for placing the power supply unit is improved by reducing the number of the inserts of the capsules 2.

Referring to fig. 5, in an embodiment of the present application, a through hole 132 is formed at a bottom of the mounting groove 131, and the through hole 132 communicates with an inside of the tray body 1 and communicates with the pocket 211.

Since both ends of the bag body 2 are inserted into the mounting groove 131, the through hole 132 is directly formed at the bottom of the mounting groove 131, and the bag body can be directly communicated with the bag opening 211, and no other structure for switching is required. Therefore, the communication position is set at the bottom of the mounting groove 131, so that the communication path is further reduced while the structural stability is improved, the structure of the transfer tube body is not required, and the structure is further simplified. In an example, the vent valve 3 may be disposed between the bladder port 211 and the through hole 132, and the vent valve 3 is connected with both through threads, so that the connection sealing effect may be improved to prevent air leakage or liquid leakage under the control of the air intake amount.

In an embodiment of the present application, the tray structure 10 further includes a bottom plate (not shown), which is connected to one side of the tray body 1 and covers an opening of the mounting cavity 12, and the bottom plate is used to prop against a side of the battery cell.

On the basis that the tray main body 1 is of a frame structure, in order to further improve the stability of the tray structure 10, a bottom plate is arranged on the bottom side of the tray main body 1 and covers one side opening of the tray main body 1. The shape of the bottom plate is adapted to the shape of the tray main body 1, for example, may be rectangular parallelepiped so as to be adapted to the rectangular parallelepiped opening of the tray main body 1. The material of the bottom plate can be plastic or a section bar, and is not limited herein. Here, the bottom plate can bear the battery monomer, and the bag body 2 only extrudes the exhaust from the surface direction of perpendicular to the battery monomer, effectively improves restraint stability, and is convenient for installation and transportation. In order to reduce the weight, the bottom plate can be hollow, a plurality of spaced hollow holes are formed, or the bottom plate is only a structure formed by a plurality of transverse strips or vertical strips in a staggered manner, and the structure is not limited herein.

In addition, the inlet 11 of the tray main body 1 is also connected with the vent valve 3, so that the on-off of air flow can be realized, and the tightness of the connection with an air source is improved. The inlet 11 is provided at one side of the tray main body 1 in the first direction, so that fluid can be directly introduced into the pocket 211 through both sides in the second direction, and the other side opposite to the inlet 11 can be provided as an opening, i.e., the tray main body 1 is provided in a U-shape. The inlets 11 may be provided in two, and located at both sides of the tray main body 1 in the first direction, that is, the tray main body 1 has a square ring shape, so that the air flow input or output to the bag body 2 can be simultaneously achieved.

When the inlet 11 is arranged in one, and one side opposite to the inlet 11 is arranged in an open mode, two protrusions 13 which are farthest from one side of the inlet 11 in the tray main body 1 are connected, so that a plate structure is formed, the battery cell can be protected, and the battery cell is prevented from being damaged by accidental collision.

The present invention also contemplates a battery production apparatus (not shown) comprising a tray structure 10 as described in any of the above. The specific structure of the tray structure 10 refers to the above embodiment, and since the battery production device adopts all the technical solutions of all the embodiments, the specific structure at least has the beneficial effects brought by the technical solutions of the embodiments, and will not be described in detail herein.

Optionally, the battery production device is a formation machine, i.e. a machine for implementing a formation process on the battery. Alternatively, the battery production apparatus is a capacity machine, i.e., a machine for performing capacity testing on batteries.

The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.

Claims

1. A tray structure, characterized in that the tray structure comprises:

the device comprises at least two bag bodies, at least two bag bodies and a plurality of battery cells, wherein the at least two bag bodies are arranged on the tray main body at intervals along a first direction, the opposite surfaces of the two adjacent bag bodies are in deformable arrangement, each bag body is provided with a bag cavity capable of being filled with a fluid medium, the cavity wall of each bag cavity is provided with a bag opening communicated with the interior of the tray main body, and a battery cell is placed between the two adjacent bag bodies;

the bag body comprises a frame body and a flexible cover arranged on at least one surface of the frame body, the flexible cover and the frame body are enclosed to form the bag cavity, and the frame body is arranged on the tray main body;

the battery cells are arranged in an array mode at least in the second direction, two adjacent bag bodies are used for simultaneously clamping the at least two battery cells arranged side by side in the second direction, and the surface of one bag body correspondingly abuts against and presses the surface of the largest surface of the two adjacent battery cells;

the middle part of the frame body is connected with a partition piece, the partition piece divides the capsule cavity into two non-communicated sub-cavities, each sub-cavity is communicated with one capsule opening, and the two sub-cavities are distributed in the second direction.

2. The tray structure of claim 1, wherein a vent valve is connected to the cuff, the vent valve being removably connected to the tray body and in communication with the interior of the tray body.

3. The tray structure of claim 1, wherein the flexible covers are provided on both surfaces of the frame body, and the two flexible covers and the frame body enclose the pocket.

4. A tray structure according to any one of claims 1 to 3, wherein the flexible cover is attached to the frame by means of adhesive or by means of a plug.

5. A tray structure according to any one of claims 1 to 3, wherein the flexible cover is made of rubber or memory cotton;

and/or the frame body is made of engineering plastics.

6. A tray structure as claimed in any one of claims 1 to 3, wherein half of the area of the flexible cover is greater than or equal to the area of the largest face of a cell.

7. A tray structure according to any one of claims 1 to 3, wherein the frame body is provided with a boss on one side in a direction perpendicular to the first and second directions, the boss being for abutting against at least part of one side of the battery cell.

8. A tray structure according to any one of claims 1 to 3, wherein the tray body is provided in a frame and is formed with a mounting cavity having openings on both sides, the capsule being mounted in the mounting cavity, the capsule opening being formed at an end of the capsule abutting against a cavity wall of the mounting cavity.

9. The tray structure of claim 8, wherein the wall of the mounting cavity is formed with at least two mounting grooves, one end of one of the pockets being inserted into one of the mounting grooves.

10. The tray structure of claim 9, wherein the mounting cavity has a plurality of protrusions protruding from a cavity wall, and adjacent protrusions enclose the mounting groove.

11. The tray structure of claim 9, wherein a plurality of said mounting slots are provided, said plurality of mounting slots being respectively provided in spaced relation to two opposite walls of said mounting cavity, and each of said pockets being respectively provided at both ends thereof with one of said mounting slots.

12. The tray structure of claim 11, wherein a wall of the mounting chamber is provided with a greater number of mounting grooves than the number of pockets to change positions of the pockets to adjust a distance between the pockets.

13. The tray structure of claim 9, wherein a through hole is formed at a bottom of the mounting groove, and the through hole communicates with an inside of the tray main body and with the pocket.

14. The tray structure of claim 8, further comprising a bottom plate connected to one side of the tray body and covering an opening of the mounting cavity, wherein the bottom plate is configured to abut against a side of the battery cell.

15. A battery production apparatus comprising the tray structure according to any one of claims 1 to 14.