CN112201801A

CN112201801A - Battery pressurizing device and battery pressurizing method

Info

Publication number: CN112201801A
Application number: CN202011186995.7A
Authority: CN
Inventors: 张瑛; 胡青松; 丁团员; 刘国雄; 魏建刚; 强志杰; 徐福斌; 阳如坤
Original assignee: Shenzhen Dingyang Intelligent Electric Co ltd
Current assignee: Shenzhen Dingyang Intelligent Electric Co ltd
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2021-01-08

Abstract

A battery pressurization device, comprising: driving piece, sliding plate, electric core layer, buffer layer, fixed plate, guiding axle and base. The slide plate is axially slidable along the guide shaft. The electric core layer is V type, can dismantle to fix between two sliding plates, and V type electric core layer is used for placing the battery, and 5 bottom heights of V type electric core layer are not less than 4 bottom heights of sliding plate. The buffer layer is fixed between the sliding plate and the battery. The both sides of base set up the fixed plate respectively, fixed guiding axle between the fixed plate. The fixed plate is provided with a through hole, one side of the fixed plate is fixedly provided with a guide shaft, the other side of the fixed plate is provided with a driving piece, and the connecting rod penetrates through the through hole and is fixedly connected with the sliding plate. Because the electric core layer is the V type structure for the battery bottom can not be because gravity falls on the bottom surface, and battery whole part all is on electric core layer. The entire surface of the battery can be pressurized. Because the density of the elastic buffer layer is low, the buffer layer has enough creeping space inside, and the low point of the plane of the sliding plate is better filled, so that the surface of the battery is subjected to uniform pressure.

Description

Battery pressurizing device and battery pressurizing method

Technical Field

The invention relates to the technical field of battery manufacturing, in particular to a battery pressurizing device and a battery pressurizing method.

Background

At present, when pressurizing two surfaces of a battery, the silica gel pad is adopted and placed in an inverted U shape, so that when the battery is placed, the bottom of the battery is not supported and is in contact with a base of a pressurizing device, the problem that the bottom of the battery cannot be pressurized easily exists, and the processing quality of the battery is influenced. Even if the silica gel pad that the type of falling U placed sets up long enough, because the dull and stereotyped bottom of exerting pressure does not contact with the base, leaves the clearance between the bottom of exerting pressure dull and stereotyped and the base, so still has the problem that the battery bottom can't be exerted pressure.

Disclosure of Invention

The present invention provides a battery pressurizing apparatus and a battery pressurizing method, and has a main object to enable the entire surface of a battery to be uniformly pressurized.

The present application provides in one embodiment a battery pressurizing apparatus, comprising: the device comprises a driving piece, a sliding plate, an electric core layer, a buffer layer, a fixed plate, a guide shaft and a base;

the sliding plates are at least two and can slide along the axial direction of the guide shaft; the battery core layer is V-shaped, the battery core layer is detachably fixed between the two sliding plates, the V-shaped battery core layer is used for placing batteries, and the bottom height of the V-shaped battery core layer is not lower than that of the sliding plates; securing the buffer layer between the sliding plate and the battery;

two sides of the base are respectively provided with a fixing plate, one side of the base is provided with a first fixing plate, the other side of the base is provided with a second fixing plate, and the guide shaft is fixed between the first fixing plate and the second fixing plate;

the fixed plate is provided with a through hole, one side of the first fixed plate is fixed with the guide shaft, the other side of the first fixed plate is provided with the driving piece, and the connecting rod of the driving piece penetrates through the through hole to be fixedly connected with the sliding plate.

In one embodiment, a force application plate is arranged between the sliding plate and the first fixing plate, the force application plate is fixedly connected with the sliding plate on one side close to the driving piece, the force application plate can axially slide along the guide shaft, and the connecting rod of the driving piece passes through the through hole and is fixedly connected with the force application plate.

In one embodiment, the electric core layer is a V-shaped electric core layer arranged periodically.

In one embodiment, the top of the sliding plate is provided with at least two grooves, two side edges of the top of the V-shaped cell layer are respectively provided with at least two holes, and the V-shaped cell layer is detachably fixed between the sliding plates through a fixing seat.

In one embodiment, the adjacent sliding plates are connected by a connecting member, and the connecting member is positioned at the outer edge of the sliding plate.

In one embodiment, the buffer layer is an elastic buffer layer; the buffer layer has an area larger than that of the battery.

In one embodiment, the sliding plate includes a first sliding plate and a second sliding plate, the second sliding plate is axially slidable along the guide shaft, and the first sliding plate and the second sliding plate are detachably fixed.

In one embodiment, the cell layer is detachably fixed between the two first sliding plates.

The invention also provides a battery pressurization method, which comprises the following steps: placing the battery into the V-shaped concave surface of the V-shaped electric core layer, and starting the driveThe movable piece is used for moving the connecting rod to one end far away from the driving piece, and the distance between the sliding plates is shortened; the sliding plate, the buffer layer and the battery are extruded; after extrusion is completed, the connecting rod moves towards one end close to the driving piece, and the distance between the sliding plates is enlarged; the buffer layer has a maximum elastic deformation of more than 30% and a density of less than 1g/cm³The elastic buffer layer of (2).

In one embodiment, the thickness of the elastic buffer layer is 1-20 mm.

According to the battery pressurizing device in the above embodiment, since the electric core layer for placing the battery is of the V-shaped structure, when the battery is placed into the battery, the battery can be placed on the V-shaped electric core layer, namely, the battery can be caught by the V-shaped electric core layer, so that the bottom of the battery cannot fall on the ground due to gravity, and the whole part of the battery is on the electric core layer. The height of the bottom of the V-shaped battery cell layer is not lower than that of the bottom of the sliding plate, the whole surface of the battery can be pressurized, and the surface processing area of the battery is increased. The electric core layer is detachably fixed between the two sliding plates, so that the electric core layer is convenient to replace. When pressure is required to be applied to the surface of the battery and the flatness of the surface of the battery is improved, the driving piece is started to push the sliding plates, so that the battery is tightly pressed by the sliding plates, and the pressure applied to the surface of the battery is uniform through the buffer layer.

Drawings

Fig. 1 is a schematic view of the overall structure of a battery pressure applying apparatus according to an embodiment of the present application;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

FIG. 3 is a schematic view of a fixing structure of an electrical core layer according to an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of a W-shaped core layer according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of a battery pressure applying apparatus according to an embodiment of the present application;

FIG. 6 is a schematic diagram illustrating the pressing effect of the battery pressing device using a silicone material;

fig. 7 is a schematic diagram illustrating the pressing effect of the battery pressing device according to an embodiment of the present disclosure.

In the figure, 1, a battery, 2, a force application plate, 3, a driving piece, 4, a sliding plate, 41, a first sliding plate, 42, a second sliding plate, 5, an electric core layer, 6, a buffer layer, 7, a fixed seat, 8, a fixed plate, 81, a first fixed plate, 82, a second fixed plate, 9, a guide shaft and 10, a chain.

Detailed Description

The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.

Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).

As shown in fig. 1 to 4, a battery pressurizing apparatus includes: the device comprises a driving piece 3, a sliding plate 4, an electric core layer 5, a buffer layer 6, a fixed plate 8, a guide shaft 9 and a base. At least two sliding plates 4 are provided, and the sliding plates 4 can slide along the axial direction of the guide shaft 9. Electric core layer 5 is the V type, and electric core layer 5 can be dismantled and fix between two sliding plates 4, and V type electric core layer is used for placing battery 1, and V type electric core layer 5 bottom height is not less than sliding plate 4 bottom height. A buffer layer 6 is fixed between the sliding plate 4 and the cell 1. The both sides of base set up fixed plate 8 respectively, and one side sets up first fixed plate 81, and the opposite side sets up second fixed plate 82, fixes guiding axle 9 between first fixed plate 81 and the second fixed plate 82. The fixing plate 8 is provided with a through hole, one side of the first fixing plate 81 is fixed with the guide shaft 9, the other side of the first fixing plate 81 is provided with the driving member 3, and the connecting rod of the driving member 3 passes through the through hole to be fixedly connected with the sliding plate 4.

As shown in fig. 1, the first fixing plate 81 corresponds to the right side, and the second fixing plate 82 corresponds to the left side. The guide shaft 9 is fixed between the first fixing plate 81 and the second fixing plate 82, and the sliding plates 4 can slide axially along the guide shaft 9 to increase or decrease the distance between the two sliding plates 4. Specifically, the guide shaft 9 may be sleeved on the sliding plate 4, as long as the sliding plate 4 can slide along the axial direction of the guide shaft 9, and the specific form is not limited. The sliding plates 4 are placed vertically, and the battery 1 between the two sliding plates 4 is also placed vertically. Between the slide plate 4 and the cell 1 a buffer layer 6 is fixed, in particular the buffer layer 6 may be fixed on either side of the slide plate 4 or the core layer 5. Preferably, the buffer layer 6 may be fixed on any one side surface of the electrical core layer 5, the buffer layer 6 may be fixed on one side of the electrical core layer 5 close to the sliding plate 4, or may be fixed on one side of the electrical core layer 5 far from the sliding plate 4, wherein the electrical core layer 5 is made of a thin and soft material, and has negligible thickness and no influence on the transmission of force. The buffer layer 6 is fixed on the electric core layer 5, and the buffer layer 6 is convenient to operate when needing to be replaced. In fig. 1, the number of guide shafts 9 is 4, and the guide shafts are respectively provided at four corners of the fixing plate 8. The driving members 3 are located at the geometric center of the first fixing plate 81, the number of the driving members 3 is set as required, for example, 2 or 4 driving members can be set, and the plurality of driving members 3 are uniformly distributed on the first fixing plate 81. The driving part 3 is specifically a cylinder, a motor and the like, and the function of the driving part can be realized. The number is only an example, and should not be construed as a limitation to the present application, and the specific number is not limited as long as the number is set as required.

The driving member 3 is provided at one side of the first fixed plate 81 to adjust the distance between the sliding plates 4, and preferably, the sliding plate 4 at the leftmost side may be fixed, and the remaining sliding plates 4 may be slid along the guide shaft 9 to adjust the distance between the sliding plates 4. If necessary, if the battery pressurizing apparatus is required to have higher efficiency, the driving member 3 may be provided on one side of the second fixing plate 82, the driving member 3 provided on the second fixing plate 82 may be connected to the leftmost sliding plate 4 by a connecting rod, and the driving members 3 on the left and right sides may be simultaneously operated to press the sliding plates 4 in the direction of approaching each other. The distance between the sliding plates 4 is reduced, and the V-shaped cell layer is gradually folded, so that the battery 1 placed on the V-shaped cell layer is pressed.

In the above embodiment of the present application, the battery pressurizing device is of a V-shaped structure for the core layer used for placing the battery 1, so that when the battery 1 is placed into the battery pressurizing device, the battery 1 can be placed on the V-shaped core layer, that is, the battery 1 can be held by the V-shaped core layer, so that the bottom of the battery 1 cannot fall on the ground due to gravity, and the whole part of the battery 1 is on the core layer 5. And the height of the bottom of the V-shaped cell layer is not lower than that of the sliding plate 4, so that the whole surface of the battery 1 can be pressurized, and the surface processing area of the battery 1 is increased (namely the surfaces are two planes on the left side and the right side of the battery 1 shown in figure 1). The electric core layer 5 is detachably fixed between the two sliding plates 4, so that the electric core layer 5 (comprising the buffer layer 6 fixed on the electric core layer 5) can be replaced conveniently. When pressure needs to be applied to the surface of the battery 1 and the flatness of the surface of the battery is improved, the driving piece 3 is started to push the sliding plates 4, so that the sliding plates 4 tightly press the battery 1, and the pressure on the surface of the battery 1 is uniform through the buffer layer 6.

When the surface of the battery 1 is pressed to improve the flatness of the surface of the battery, the battery at this time belongs to a semi-finished product, and the upper end of the battery is provided with an air bag, as shown in fig. 1, a part of the battery 1 higher than the sliding plate 4 is the air bag, and the whole battery 1 is arranged between the V-shaped cell layers, namely between the sliding plates 4, and the whole surface of the battery 1 can be pressed.

In one embodiment, the force application plate 2 is disposed between the sliding plate 4 and the first fixing plate 81, the force application plate 2 is fixedly connected to the sliding plate 4 (i.e., the rightmost sliding plate 4 shown in fig. 1) on the side close to the driving member 3, the force application plate 2 can slide axially along the guide shaft 9, and the connecting rod of the driving member 3 passes through the through hole and is fixedly connected to the force application plate 2.

If the connecting rod is directly and fixedly connected with the sliding plate 4, structures such as grooves or holes need to be formed on the sliding plate 4, the surface flatness of the sliding plate 4 is damaged, and therefore the uniform transmission of force is influenced. Set up application of force board 2, the connecting rod passes through application of force board 2 to the transmission power of sliding plate 4, and the even uniformity of 4 surface force transmission of better assurance sliding plate improves the degree of consistency that 1 surface of battery applyed the pressure, guarantees that the battery is inside to be evenly flattened, and the production quality of improvement battery is gassed simultaneously.

In one embodiment, the cell layer 5 is a V-shaped cell layer arranged periodically. When the number of the periodically arranged cell layers is two, the two V-shaped cell layers are similar to W-shaped cell layers. The structural advantage of the periodically arranged V-shaped electric core layer is illustrated by taking a W-shaped electric core layer as an example. As shown in fig. 3, two side edges of the V-shaped cell layer are fixed on the sliding plates 4, and when the cell layer needs to be detached or replaced, the V-shaped cell layer has a problem of falling between the two sliding plates 4. If the W-shaped cell layer is adopted, at least one part of the W-shaped cell layer is hung on the sliding plates 4 when the W-shaped cell layer is disassembled or replaced, so that the problem that the W-shaped cell layer falls between the two sliding plates 4 is solved. And the V-shaped cell layers arranged periodically are easy to continuously process and have low cost. Elastic buffer layer repeatedly usable if fix on arbitrary side of W type electric core layer, when needs are dismantled or are installed, can one step target in place, all fix elastic buffer layer and W type electric core layer on pressure device simultaneously, need not fix elastic buffer layer and W type electric core layer respectively, more need not fix V type electric core layer respectively, and it is more convenient to operate. For the V-shaped electric core layers arranged periodically, the top edges of the two ends of the electric core layer 5 are fixed at the top of the sliding plate 4, and the rest top electric core layer parts are abutted against the top of the sliding plate 4, so that the structure is simplified, and the cost is reduced.

In one embodiment, at least two grooves are formed in the top of the sliding plate 4, at least two holes are formed in two side edges of the top of the V-shaped cell layer respectively, and the V-shaped cell layer is detachably fixed between the sliding plates 4 through the fixing base 7. Fixing base 7 and recess can be dismantled the V type electricity core layer with the fixed form of bolt and fix between sliding plate 4, when V type electricity core layer was dismantled to needs, extract fixing base 7, can dismantle V type electricity core layer. As shown in fig. 3, a row of grooves may be provided on the top of the sliding plate 4, which increases the flexibility of use of the sliding plate 4, and when batteries of different sizes need to be processed, the sliding plate 4 does not need to be replaced because of improper groove positions. And the edges of two sides of the top of the V-shaped electric core layer are respectively provided with a row of corresponding holes, so that the application flexibility of the V-shaped electric core layer is improved.

In one embodiment, adjacent sliding plates 4 are connected by a connecting member, which is located at the outer edge of the sliding plate 4. As shown in fig. 2, the outer edges of the sliding plates 4 are provided with connecting members to avoid the problem that the connecting members are sandwiched between the two sliding plates 4 when the sliding plates 4 are close to each other. Specifically, set up bayonet socket spare at the outside border of sliding plate 4, chain 10 passes the bayonet socket spare on each sliding plate 4 in proper order, and similar threading needle principle is connected to each sliding plate 4 and is one, like this when accomplishing the battery operation of exerting pressure after, the connecting rod is to driving piece end motion, can continue to drive each sliding plate 4 motion, and interval between sliding plate 4 continues the grow, does not need artificially to part each sliding plate 4, and is more high-efficient, convenient. The outer edges of the two sliding plates 4 can also be connected by a rigid rope, and the specific form is not limited. The number of the connecting pieces is set according to needs, and the specific number is not limited.

In one embodiment, the buffer layer 6 is an elastic buffer layer, which is more easily deformed and better attached to the microscopic concave-convex surfaces on the surfaces of the battery 1 and the sliding plate 4, so that the sliding plate 4 applies uniform pressure to the surface of the battery 1. The buffer layer 6 has an area larger than that of the battery 1. Better carry out pressure transmission to the surface of whole battery, avoid local battery can't be exerted pressure, influence battery processingquality's phenomenon.

In one embodiment, the sliding plate 4 includes a first sliding plate 41 and a second sliding plate 42, the second sliding plate 42 is capable of sliding axially along the guide shaft 9, and the first sliding plate 41 and the second sliding plate 42 are detachably fixed. The core layer 5 is detachably fixed between the two first sliding plates 41. By arranging the first sliding plate 41 and the second sliding plate 42, the second sliding plate 42 is slidably sleeved on the guide shaft 9, and only the first sliding plate 41 needs to be detached at the moment when sliding plates 4 with different thicknesses need to be replaced according to different processing sizes of batteries. Specifically, as shown in fig. 2, a vertical groove is formed in the second sliding plate 42, as shown in fig. 3, a convex strip is formed at an end of the first sliding plate 41, the first sliding plate 41 slides downward, and the convex strip and the vertical groove are in concave-convex fit, so that the first sliding plate 41 can be fixed. When the first sliding plate 41 needs to be replaced, the first sliding plate 41 is pulled out in the same manner as the drawer pulling principle. In other embodiments, the sliding plate 4 may be a unitary structure, and the end of the sliding plate 4 may be slidably fitted over the guide shaft 9.

A method of pressurizing a battery comprising the steps of: the battery 1 is placed in the V-shaped concave surface of the V-shaped battery core layer 5, the driving part 3 is started, the connecting rod moves towards one end far away from the driving part 3, and the distance between the sliding plates 4 is shortened. Compression occurs between the slide plate 4, the buffer layer 6 and the cell 1. After the extrusion is completed, the connecting rod moves to the end close to the driving member 3, and the distance between the sliding plates 4 is widened. The buffer layer 6 has a maximum elastic deformation of more than 30% and a density of less than 1g/cm³The elastic buffer layer(s) of (1), and specific elastic buffer layers may be a sponge buffer layer, an EPE (polyethylene foam) buffer layer, or the like. Adopt the elastic buffer layer, after applying external force through driving piece 3 and ending, the internal stress can let the elastic buffer layer resume to the original state to the elastic buffer layer that guarantees to start driving piece 3 during operation next time and previous has the uniformity. The thickness of the slide plate 4 is 5-50 mm.

The thickness of the elastic buffer layer is 1-20 mm. The effect is better the thicker the thickness of elastic buffer layer, but the increase of thickness can lead to the improvement of cost on the one hand, and on the other hand in-service use is also inconvenient, and elastic buffer layer's thickness also can not be too thin, and the effect is not good too thin. When the thickness of the elastic buffer layer is 1-20mm, the battery pressurizing effect is better.

The driver 3 exerts a pressure of not more than 6 tonnes. In the process of increasing the pressure of the cylinder, the pressure increasing mutation is larger than that of the motor, but the cost of the cylinder is low. The motor has a gradual process relative to the cylinder when increasing pressure, and cannot be suddenly increased to a certain larger pressure value, so that the production quality of the battery 1 is guaranteed, but the cost of the motor is higher. The specific adopted mode can be flexibly selected according to the actual situation, and is not limited here.

The flat plate stress structure has the advantages that pressure is applied to the plane of a flat plate object, the flat plate object is required to be evenly stressed on the stress object testing surface, all pressure intensity on a unit area is kept consistent, the existing flat plate stress structure is in the process of converting point stress into surface stress, due to actual production processing errors, the flat plate is difficult to achieve absolute flatness, when the acting force is transmitted on the surface of the flat plate, the high point between the stress surfaces is generally transmitted to the object to be tested, and the low point on the surface of the object to be tested cannot be stressed.

As shown in fig. 5, the sliding plate 4 is not an ideal rigid body with a flat surface due to the processing precision, the microscopic surface is uneven, the point B is a low point, and the point C is a high point, so that the pressure per unit area of each surface of the battery is not uniform during the production process of the battery, the performance per unit area of the battery is inconsistent, the quality of the produced battery is reduced, and even a defective product is generated. The buffer layer 6 of the application adopts the structure that the maximum elastic deformation is more than 30 percent and the density is less than 1g/cm³The elastic buffer layer has enough creeping space (the arrow in the horizontal direction of figure 5 is the creeping direction, the vertical arrow is the force transmission diagram) inside the buffer layer 6 due to low density, therefore, when the high point of the sliding plate 4 is stressed greatly, the elastic buffer layer can creep to the part with smaller pressure, the low point of the plane of the sliding plate 4 is better filled, the stress of the high point is equal to that of the low point, and the purpose of transmitting the pressure from the sliding plate 4 to the surface of the battery uniformly is achieved. Pressure is applied to both surfaces of the actual processed cell, and fig. 5 illustrates one of the surfaces being subjected to force.

At present, the buffer layer 6 is made of silica gel materials mostly, and although the silica gel materials also have certain elastic deformation, the silica gel materials cannot well fill the low points when the silica gel materials are stressed to creep from the high points to the low points, so that the stress of the high points and the stress of the low points still have partial difference.

The buffer layer 6 is made of silica gel material, the maximum elastic deformation of the buffer layer is more than 30 percent, and the density of the buffer layer is less than 1g/cm³The elastic buffer layer has obvious effect difference in battery production.

The tests are now as follows: the pressure-sensitive paper is placed between the battery 1 and the buffer layer 6, the driving piece is started to press, and when the pressure reaches a certain value, the paper surface becomes dark. When the buffer layer 6 is made of a silica gel material, the stress of a high point is large, the color change value of the pressure sensitive paper is achieved, the high point becomes dark, the stress of a low point is small, the color change value of the pressure sensitive paper is not achieved, the color change of the position is not achieved, and the color change of the whole plate is not uniform, as shown in fig. 6, the diagram is only one of the conditions, and the condition is represented as diversity and is not unique. When the cushion layer 6 is an elastic cushion layer of the present application, the pressure sensitive paper becomes almost entirely dark, as shown in fig. 7, indicating uniform pressure transmission. Therefore, the buffer layer 6 of the present application can improve the production quality of the battery.

The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.

Claims

1. A battery pressurization device, comprising: the battery cell comprises a driving piece (3), a sliding plate (4), a battery cell layer (5), a buffer layer (6), a fixed plate (8), a guide shaft (9) and a base;

the number of the sliding plates (4) is at least two, and the sliding plates (4) can slide along the axial direction of the guide shaft (9); the electric core layer (5) is V-shaped, the electric core layer (5) is detachably fixed between the two sliding plates (4), the V-shaped electric core layer (5) is used for placing a battery (1), and the height of the bottom of the V-shaped electric core layer (5) is not lower than that of the sliding plates (4); -fixing the buffer layer (6) between the sliding plate (4) and the battery (1);

fixing plates (8) are respectively arranged on two sides of the base, a first fixing plate (81) is arranged on one side of the base, a second fixing plate (82) is arranged on the other side of the base, and the guide shaft (9) is fixed between the first fixing plate (81) and the second fixing plate (82);

the fixed plate (8) is provided with a through hole, one side of the first fixed plate (81) is fixed with the guide shaft (9), the other side of the first fixed plate is provided with the driving piece (3), and a connecting rod of the driving piece (3) penetrates through the through hole to be fixedly connected with the sliding plate (4).

2. The battery pressurizing apparatus according to claim 1, wherein a force applying plate (2) is provided between the sliding plate (4) and the first fixing plate (81), the force applying plate (2) is fixedly connected to the sliding plate (4) adjacent to one side of the driving member (3), the force applying plate (2) is axially slidable along the guide shaft (9), and the connecting rod of the driving member (3) is fixedly connected to the force applying plate (2) through the through hole.

3. The cell pressurizing apparatus according to claim 1, wherein the core layer (5) is a V-shaped core layer arranged periodically.

4. The battery pressurizing device according to claim 2, wherein the top of the sliding plate (4) is provided with at least two grooves, the two side edges of the top of the V-shaped cell layer are respectively provided with at least two holes, and the V-shaped cell layer is detachably fixed between the sliding plates (4) through the fixing seat (7).

5. The battery pressurizing device according to claim 1, wherein adjacent sliding plates (4) are connected by a connecting member located at an outer side edge of the sliding plates (4).

6. The cell pressing device according to claim 1, wherein the buffer layer (6) is an elastic buffer layer; the area of the buffer layer (6) is larger than that of the battery (1).

7. The battery pressurizing device according to claim 1, wherein the sliding plate (4) comprises a first sliding plate (41) and a second sliding plate (42), the second sliding plate (42) being axially slidable along the guide shaft (9), the first sliding plate (41) and the second sliding plate (42) being detachably fixed.

8. Cell pressurizing device according to claim 7, wherein the core layer (5) is detachably fixed between the two first sliding plates (41).

9. A method for pressurizing a battery, using the battery pressurizing apparatus according to any one of claims 1 to 8, comprising the steps of: placing a battery (1) into a V-shaped concave surface of the V-shaped battery core layer (5), starting a driving piece (3), moving the connecting rod to one end far away from the driving piece (3), and shortening the distance between the sliding plates (4); the sliding plate (4), the buffer layer (6) and the battery (1) are extruded; after extrusion is completed, the connecting rod moves to one end close to the driving piece (3), and the distance between the sliding plates (4) is enlarged; the buffer layer (6) has the maximum elastic deformation more than 30% and the density less than 1g/cm³The elastic buffer layer of (2).

10. The method of pressurizing a battery according to claim 9, wherein the thickness of the elastic buffer layer is 1 to 20 mm.