CN208655793U - Pressing device for preparing negative electrode material of lithium ion battery - Google Patents

Abstract

The utility model provides a pressing device for preparing a lithium ion battery cathode material, which comprises a base, a pair of screw rods, a baffle plate, a sliding support plate, a top plate and a driving piece, wherein one end of the screw rods is fixed on the base, the baffle plate is sleeved on the screw rods and is spaced from the base, the sliding support plate and the top plate are sleeved on the screw rods, and the driving piece is fixed between the sliding support plate and the top plate; the sliding support plate is spaced from the partition plate and arranged on one side of the partition plate away from the base, and the top plate is spaced from the sliding support plate and arranged on one side of the sliding support plate away from the partition plate; the partition plate and the top plate are fixedly connected with the screw rod; an elastic part is arranged between the sliding support plate and the partition plate, a pressure head which is connected and matched with the driving part is arranged on one side of the sliding support plate, which is close to the partition plate, and the partition plate is provided with a through hole which penetrates through the partition plate and can be penetrated by the pressure head; one side of the base close to the partition board is a working surface; the device also comprises a drawing plate and a die which are arranged on the working surface and positioned between the working surface and the partition plate, wherein the die is arranged on the drawing plate and matched with the pressure head.

Description

Pressing device for preparing negative electrode material of lithium ion battery

【Technical field】

The utility model relates to the field of battery material preparation, in particular to a pressing device for preparing negative electrode materials of lithium ion batteries.

【Background technique】

Lithium-ion batteries are widely used in mobile electronic terminal equipment and electric vehicles due to their advantages of high specific energy, low self-discharge rate, and environmental friendliness. direction of energy density. Generally speaking, when the material system of positive and negative electrodes is determined, the energy density of lithium-ion batteries mainly depends on the specific capacity of positive and negative electrode materials. Among them, silicon-based anode materials can form alloys with lithium and have very high theoretical capacity (4200mAh/g), and are inexpensive and abundant in resources. They are the most potential anode materials for future lithium-ion batteries.

In order to improve the cycle performance of silicon-based anode materials, elemental silicon nanoization is a common method. As the particle size decreases, the volume change of silicon can be reduced to a certain extent, thereby reducing the stress inside the battery. However, in the prior art, when using low-temperature chemical reaction to prepare nano-silicon, the method of manually grinding raw materials is usually used to achieve the purpose of improving the reaction efficiency. The yield is low and not suitable for scale-up or pilot experiments. In view of this, it is necessary to provide a pressing device for preparing negative electrode materials for lithium ion batteries to overcome the above-mentioned defects.

【Content of utility model】

The purpose of the utility model is to provide a pressing device for preparing negative electrode materials of lithium ion batteries, which is easy to operate, can meet the needs of pilot scale-up experiments, and is beneficial to industrialized production.

In order to achieve the above purpose, the present invention provides a pressing device for preparing a negative electrode material of a lithium ion battery, comprising a base, a pair of screw rods with one end fixed on the base, and a pair of screw rods sleeved on the pair of screw rods and spaced from the base. a partition plate, a sliding support plate and a top plate sleeved on a pair of screw rods, and a driving member fixed between the sliding support plate and the top plate; the sliding support plate and the partition plate are arranged at intervals and are arranged on the partition plate away from the base The top plate and the sliding support plate are arranged at intervals and on the side of the sliding support plate away from the partition plate; the partition plate and the top plate are fixedly connected with the screw rod through nuts; between the sliding support plate and the partition plate An elastic member is provided, the side of the sliding support plate close to the partition plate is provided with a pressure head that is connected and matched with the driving member, and the partition plate is provided with a through hole that penetrates through the partition plate and can be passed through by the pressure head; the The driving member is used to drive the sliding support plate to move toward or away from the separator along the screw rod; the side of the base close to the separator is the working surface; the pressing device for preparing the negative electrode material of the lithium ion battery It also includes a drawing plate and a mold placed on the working surface and between the working surface and the partition plate, the mold is placed on the drawing plate and matched with the pressing head.

In a preferred embodiment, the driving member is a hydraulic jack and is provided with an operating rod.

In a preferred embodiment, the end of the driving member facing away from the sliding support plate is a telescopic end, the telescopic end is connected to a top plate fixed on a pair of screw rods, and the end of the driving member facing away from the telescopic end is fixed on a Slide the support plate.

In a preferred embodiment, the working surface is provided with a pair of parallel spaced limit bars for positioning the drawer, the drawer is rectangular and the width corresponds to the distance between the pair of limit bars .

In a preferred embodiment, the elastic members are a pair of springs respectively sleeved on a pair of screw rods, and two ends of each spring are respectively connected to the partition plate and the sliding support plate.

In a preferred embodiment, the indenter is cylindrical, and the mold is cylindrical and has a cylindrical inner cavity corresponding to the indenter.

Compared with the prior art, the beneficial effect of the pressing device for preparing the negative electrode material of the lithium ion battery provided by the present invention is that the pressing head is driven by the driving member to press and form the raw material for preparing the negative electrode material, and the gap between the raw material particles is fully removed. The air can improve the reaction efficiency in the preparation process, ensure the complete reaction, thereby improving the product yield; and the cost is low, the operation is simple, and the manpower is saved, which can meet the needs of pilot scale-up experiments, and is conducive to industrialized production.

【Description of drawings】

FIG. 1 is a three-dimensional structural diagram of a pressing device for preparing a negative electrode material for a lithium ion battery provided by the present invention.

【Detailed ways】

In order to make the objectives, technical solutions and beneficial technical effects of the present utility model more clearly understood, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described in this specification are only for explaining the present invention, not for limiting the present invention.

Referring to FIG. 1 , the present invention provides a pressing device 100 for preparing a negative electrode material of a lithium ion battery, comprising a base 10 , a pair of screw rods 20 , one end of which is fixedly welded on the base 10 , and a pair of screw rods 20 sleeved on the base 10 . The partition plate 30 on top and spaced from the base 10 , the sliding support plate 40 and the top plate 50 sleeved on the pair of screw rods 20 , and the driving member 60 fixed between the sliding support plate 40 and the top plate 50 . The sliding support plate 40 is spaced apart from the partition plate 30 and is disposed on the side of the partition plate 30 away from the base 10 , and the top plate 50 is spaced apart from the sliding support plate 40 and disposed on the side of the sliding support plate 40 away from the partition plate 30 , namely the partition plate 30. The sliding support plate 40 and the top plate 50 are sequentially arranged from the end of the screw rod 20 connected with the base 10 to the direction away from the base 10 . The partition plate 30 and the top plate 50 are fixedly connected to the screw rod 20 through nuts. In other embodiments, the pair of screw rods 20 may also be fixed on the base 10 by means of nuts, snaps, or the like.

Specifically, an elastic member 70 is provided between the sliding support plate 40 and the partition plate 30 , the side of the sliding support plate 40 close to the partition plate 30 is provided with a pressing head 80 which is connected and matched with the driving member 60 , and the partition plate 30 is provided with a through-hole The separator 30 is a through hole 31 through which the indenter 80 can pass. The driving member 60 is used to drive the sliding support plate 40 to move toward or away from the partition plate 30 along the screw rod 20 , thereby driving the pressing head 80 to move toward or away from the base 10 .

Specifically, the side of the base 10 close to the partition plate 30 is the working surface 11 . The pressing device 100 for preparing the negative electrode material of the lithium ion battery provided by the present invention further includes a suction plate 12 and a mold 13 placed on the working surface 11 and located between the working surface 11 and the separator 30 , and the mold 13 is placed on the suction plate 13 . 12 and cooperate with the indenter 80. In this embodiment, the indenter 80 is cylindrical, and correspondingly, the mold 13 is cylindrical and has a cylindrical inner cavity corresponding to the indenter 80 . It should be noted that the mold 13 is used to place the raw materials for preparing the negative electrode material, and the dimensions of the mold 13 and the driving member 60 are flexibly adjusted according to actual production requirements.

In this embodiment, the driving member 60 is a hydraulic jack and is provided with an operating rod 61. The driving member 60 can be operated by shaking or pulling the operating rod 61. The hydraulic jack has a compact structure, stable operation and self-locking function. The end of the driving member 60 facing away from the sliding support plate 40 is the telescopic end 62 , the telescopic end 62 is connected to the top plate 50 fixed on the pair of screw rods 20 , and the end of the driving member 60 opposite to the telescopic end 62 is fixed on the sliding support plate 40 .

In this embodiment, the working surface 11 is provided with a pair of parallel spaced limit bars 111 for positioning the drawer 12 , which is convenient for placing the drawer 12 . The drawer 12 is rectangular and has a width corresponding to the width of the pair of limit bars 111 The distance between them, that is, the pumping plate 12 is limited between a pair of limiting bars 111 .

In this embodiment, the elastic members 70 are a pair of springs respectively sleeved on the pair of screw rods 20 , and both ends of each spring are respectively connected to the partition plate 30 and the sliding support plate 40 .

It can be understood that, in other embodiments, the number of the screw rods 20 may be more than two.

The utility model can be used with a sintering furnace or other containers for the preparation of negative electrode materials such as nano-silicon. , and then place the mold 13 and the drawing plate 12 on the working surface 11 and align with the indenter 80 . By manually using the operating lever 61, the driving member 60 starts to operate and drives the sliding support plate 40 to compress the elastic member 70, thereby driving the indenter 80 to move in the direction close to the base 10 to press the raw material in the mold 13 and fully remove the gap between the raw material particles. The air can improve the reaction efficiency in the preparation process, ensure the thorough reaction of the reaction, thereby improving the product yield. After the pressing is completed, by using the elastic restoring function of the operating rod 61 and the elastic member 70, the driving member 60 and the sliding support plate 40 can be quickly restored to their original positions.

The pressing device 100 for preparing the negative electrode material of the lithium ion battery provided by the present invention, the driving member 60 drives the pressing head 80 to press and form the raw material for preparing the negative electrode material, and fully removes the air between the raw material particles, which can improve the production process. The reaction efficiency is improved, the reaction is ensured thoroughly, and the product yield is improved; and the cost is low, the operation is simple, and the manpower is saved, which can meet the needs of the pilot scale-up experiment and is conducive to industrial production.

The present invention is not limited only to what is described in the specification and embodiments, so that those skilled in the art can easily realize additional advantages and modifications, without departing from the spirit and spirit of the general concept defined by the claims and equivalent scope. In scope, the invention is not limited to the specific details, representative apparatus, and illustrative examples shown and described herein.

Claims (6)

1. a kind of pressure setting for being used to prepare lithium ion battery negative material, it is characterised in that: be fixed on including pedestal, one end A pair of of screw rod on pedestal, be sheathed on a pair of of screw rod and with the partition at pedestal interval, the sliding branch being sheathed on a pair of of screw rod Fagging and top plate and the actuator being fixed between sliding support plate and top plate；The sliding support plate and baffle interval are arranged And it is set to side of the partition far from pedestal, the top plate is with the setting of sliding support plate interval and separate set on sliding support plate The side of partition；The partition and top plate are fixedly connected by nut with screw rod；It is equipped between the sliding support plate and partition Elastic component, the sliding support plate are equipped with the pressure head for connecting cooperation with actuator close to the side of partition, open up on the partition There is the through-hole for running through partition and passing through for pressure head；The actuator for drive the sliding support plate along screw rod to close or Direction far from partition moves；The side of close partition is working face on the pedestal；The lithium ion battery that is used to prepare is born The pressure setting of pole material further includes the pumping board and mold being placed on working face and between working face and partition, the mould Tool is placed on pumping board and cooperates with pressure head.

2. the pressure setting according to claim 1 for being used to prepare lithium ion battery negative material, it is characterised in that: described Actuator is hydraulic jack and is equipped with operating stick.

3. the pressure setting according to claim 2 for being used to prepare lithium ion battery negative material, it is characterised in that: described Actuator is telescopic end away from one end of sliding support plate, and the telescopic end is connect with the top plate being fixed on a pair of of screw rod, institute Actuator one end opposite with telescopic end is stated to be fixed on sliding support plate.

4. the pressure setting according to claim 1 for being used to prepare lithium ion battery negative material, it is characterised in that: described Working face is equipped with the positive stop strip of a pair of of parallel interval for positioning to the pumping board, and the pumping board is rectangle and width is corresponding In the distance between a pair of of positive stop strip.

5. the pressure setting according to claim 1 for being used to prepare lithium ion battery negative material, it is characterised in that: described Elastic component be a pair of of the spring and each spring that are sheathed on a pair of of screw rod respectively both ends respectively with partition and sliding support plate Connection.

6. the pressure setting according to claim 1 for being used to prepare lithium ion battery negative material, it is characterised in that: described Pressure head is cylindrical, and the mold is cylindric and has cylindric inner cavity corresponding with the pressure head.