Battery pressurizing device and battery pressurizing method

Abstract

A battery pressurizing device comprises: a driving member, a sliding plate, a battery core layer, a buffer layer, a fixed plate, a guide shaft and a base. The sliding plate can slide axially along the guide shaft. The battery core layer is V-shaped and can be detachably fixed between two sliding plates. The V-shaped battery core layer is used to place batteries, and the bottom height of the V-shaped battery core layer 5 is not lower than the bottom height of the sliding plate 4. The buffer layer is fixed between the sliding plate and the battery. Fixed plates are respectively provided on both sides of the base, and the guide shaft is fixed between the fixed plates. A through hole is provided on the fixed plate, and the guide shaft is fixed on one side of the fixed plate, and a driving member is provided on the other side. The connecting rod passes through the through hole and is fixedly connected to the sliding plate. Since the battery core layer has a V-shaped structure, the bottom of the battery will not fall on the bottom surface due to gravity, and the entire battery is on the battery core layer. Pressure can be applied to the entire surface of the battery. Since the density of the elastic buffer layer is relatively low, there is sufficient creep space inside the buffer layer, which better fills the low points of the sliding plate plane, so that the battery surface is subjected to uniform pressure.

Description

Technical Field

[0001] The present invention relates to the technical field of battery manufacturing, and in particular to a battery pressurizing device and a battery pressurizing method. Background Art

[0002] Currently, when applying pressure to both battery surfaces, silicone pads are used. These pads are positioned in an inverted U-shape. When the battery is placed in this way, the bottom of the battery is unsupported and contacts the base of the pressure device. This can easily prevent pressure from being applied to the bottom of the battery, affecting battery processing quality. Even if the inverted U-shaped silicone pad is long enough, the bottom of the pressure plate does not contact the base, leaving a gap between the bottom and the base, so the problem of pressure not being applied to the bottom of the battery still exists. Summary of the Invention

[0003] The present invention provides a battery pressurizing device and a battery pressurizing method, the main purpose of which is to enable uniform pressure to be applied to the entire surface of the battery.

[0004] In one embodiment of the present application, a battery pressurizing device is provided, comprising: a driving member, a sliding plate, a battery core layer, a buffer layer, a fixing plate, a guide shaft, and a base;

[0005] At least two sliding plates are provided, and the sliding plates can slide axially along the guide shaft; the battery core layer is V-shaped, and the battery core layer can be detachably fixed between the two sliding plates. The V-shaped battery core layer is used to place batteries, and the bottom height of the V-shaped battery core layer is not lower than the bottom height of the sliding plate; the buffer layer is fixed between the sliding plate and the battery;

[0006] Fixed plates are respectively provided on both sides of the base, a first fixed plate is provided on one side, and a second fixed plate is provided on the other side, and the guide shaft is fixed between the first fixed plate and the second fixed plate;

[0007] A through hole is provided on the fixing plate, the guide shaft is fixed on one side of the first fixing plate, and the driving member is provided on the other side, and a connecting rod of the driving member passes through the through hole and is fixedly connected to the sliding plate.

[0008] In one embodiment, a force plate is provided between the sliding plate and the first fixed plate, the force plate is fixedly connected to the sliding plate close to the driving member, the force plate can slide axially along the guide shaft, and the connecting rod of the driving member passes through the through hole and is fixedly connected to the force plate.

[0009] In one embodiment, the battery core layers are periodically arranged V-shaped battery core layers.

[0010] In one embodiment, at least two grooves are provided on the top of the sliding plate, and at least two holes are provided on both side edges of the top of the V-shaped battery core layer, and the V-shaped battery core layer is detachably fixed between the sliding plates through a fixing seat.

[0011] In one embodiment, adjacent sliding plates are connected via a connecting member, and the connecting member is located on the outer edge of the sliding plate.

[0012] In one embodiment, the buffer layer is an elastic buffer layer; the area of ​​the buffer layer is larger than the area of ​​the battery.

[0013] In one embodiment, the sliding plate includes a first sliding plate and a second sliding plate, the second sliding plate can slide axially along the guide shaft, and the first sliding plate and the second sliding plate are detachably fixed.

[0014] In one embodiment, the battery core layer is detachably fixed between the two first sliding plates.

[0015] The present invention also provides a battery pressurization method, comprising the following steps: placing a battery into the V-shaped concave surface of the V-shaped battery core layer, starting a driving member, and moving the connecting rod away from one end of the driving member, thereby shortening the distance between the sliding plates; squeezing occurs between the sliding plates, the buffer layer, and the battery; after squeezing is completed, the connecting rod moves toward one end of the driving member, thereby increasing the distance between the sliding plates; the buffer layer has a maximum elastic deformation greater than 30% and a density less than 1g / cm 3 elastic buffer layer.

[0016] In one embodiment, the elastic buffer layer has a thickness of 1-20 mm.

[0017] According to the battery pressurizing device in the above embodiment, since the battery core layer for placing the battery is a V-shaped structure, when the battery is placed, the battery can be placed on the V-shaped battery core layer, that is, the battery will be held by the V-shaped battery core layer, so that the bottom of the battery will not fall to the ground due to gravity, and the entire part of the battery is on the battery core layer. The height of the bottom of the V-shaped battery core layer is not lower than the height of the bottom of the sliding plate, and pressure can be applied to the entire surface of the battery, thereby increasing the processing area of ​​the battery surface. The battery core layer is detachably fixed between the two sliding plates to facilitate the replacement of the battery core layer. When it is necessary to apply pressure to the battery surface to improve the flatness of the battery surface, the driving member is started to push the sliding plate so that each sliding plate presses the battery tightly, and the pressure on the battery surface is uniform through the buffer layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a battery pressure device in one embodiment of the present application;

[0019] Figure 2for Figure 1 A partial enlarged schematic diagram in the middle;

[0020] Figure 3 This is a schematic diagram of the battery core layer fixing structure in one embodiment of the present application;

[0021] Figure 4 This is a schematic structural diagram of a W-shaped battery core layer in one embodiment of the present application;

[0022] Figure 5 This is a schematic diagram of the principle of a battery pressure device according to an embodiment of the present application;

[0023] Figure 6 Schematic diagram of the pressure effect of the battery pressure device using silicone material;

[0024] Figure 7 This is a schematic diagram of the pressure effect of the battery pressure device in one embodiment of the present application.

[0025] In the figure, 1. battery, 2. force plate, 3. driving member, 4. sliding plate, 41. first sliding plate, 42. second sliding plate, 5. battery core layer, 6. buffer layer, 7. fixing seat, 8. fixing plate, 81. first fixing plate, 82. second fixing plate, 9. guide shaft, 10. chain. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below by means of specific embodiments in conjunction with the accompanying drawings. Similar elements in different embodiments are numbered with associated similar elements. In the following embodiments, many detailed descriptions are provided to enable the present application to be better understood. However, those skilled in the art will readily appreciate that some of the features may be omitted in different circumstances, or may be replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification. This is to avoid the core portion of the present application being overwhelmed by excessive descriptions, and for those skilled in the art, it is not necessary to describe these related operations in detail. They will fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0027] In addition, the features, operations, or characteristics described in the specification may be combined in any appropriate manner to form various embodiments. Furthermore, the steps or actions in the method description may be reordered or adjusted in a manner readily apparent to those skilled in the art. Therefore, the various sequences in the specification and drawings are provided solely for the purpose of clearly describing a particular embodiment and are not intended to be mandatory, unless otherwise specified.

[0028] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings).

[0029] like Figure 1-4 As shown, a battery pressurizing device includes: a driving member 3, a sliding plate 4, a battery 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 axially along the guide shaft 9. The battery core layer 5 is V-shaped, and the battery core layer 5 can be detachably fixed between the two sliding plates 4. The V-shaped battery core layer is used to place the battery 1, and the bottom height of the V-shaped battery core layer 5 is not lower than the bottom height of the sliding plate 4. The buffer layer 6 is fixed between the sliding plate 4 and the battery 1. Fixed plates 8 are respectively provided on both sides of the base, a first fixed plate 81 is provided on one side, and a second fixed plate 82 is provided on the other side, and the guide shaft 9 is fixed between the first fixed plate 81 and the second fixed plate 82. A through hole is provided on the fixed plate 8, and the guide shaft 9 is fixed on one side of the first fixed plate 81, and the driving member 3 is provided on the other side of the first fixed plate 81. The connecting rod of the driving member 3 passes through the through hole and is fixedly connected to the sliding plate 4.

[0030] like Figure 1 As shown, the first fixed plate 81 corresponds to the right side, and the second fixed plate 82 corresponds to the left side. A guide shaft 9 is fixed between the first fixed plate 81 and the second fixed plate 82. The sliding plate 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 can be placed on the sliding plate 4, and the specific form is not limited as long as the sliding plate 4 can slide axially along the guide shaft 9. The sliding plates 4 are placed vertically, and the battery 1 between the two sliding plates 4 is also placed vertically. A buffer layer 6 is fixed between the sliding plate 4 and the battery 1. Specifically, the buffer layer 6 can be fixed to any side of the sliding plate 4 or the battery layer 5. Preferably, the buffer layer 6 can be fixed to any side of the battery layer 5, either on the side of the battery layer 5 close to the sliding plate 4 or on the side away from the sliding plate 4. The battery layer 5 is a thin layer of material that is both thin and soft, with negligible thickness and no effect on force transmission. Fixing the buffer layer 6 to the battery layer 5 facilitates replacement when necessary. Figure 1 In the embodiment, there are four guide shafts 9, one at each corner of the fixed plate 8. The driving member 3 is located at the geometric center of the first fixed plate 81. The number of driving members 3 can be set as needed, for example, two or four driving members 3 can be set, and multiple driving members 3 can be evenly distributed on the first fixed plate 81. The driving member 3 can be a cylinder, a motor, etc., as long as it can achieve the function of the driving member. The number mentioned is only an example and should not be construed as a limitation of this application. The number can be set as needed, and the specific number is not limited.

[0031] A driving member 3 is provided on one side of the first fixed plate 81 to adjust the distance between the sliding plates 4. Preferably, the sliding plate 4 on the far left side can be fixed, and the remaining sliding plates 4 can slide along the guide shaft 9 to adjust the distance between the sliding plates 4. If necessary, if there is a higher efficiency requirement for the battery pressurizing device, a driving member 3 can also be provided on one side of the second fixed plate 82. The driving member 3 provided on the second fixed plate 82 is connected to the far left sliding plate 4 via a connecting rod. When working, the driving members 3 on the left and right sides work simultaneously, squeezing the multiple sliding plates 4 in a direction toward each other. As the distance between the sliding plates 4 decreases, the V-shaped battery cell layer will gradually close together, thereby applying pressure to the battery 1 placed on the V-shaped battery cell layer.

[0032] In the battery pressurizing device of the above embodiment of the present application, since the core layer for placing the battery 1 is a V-shaped structure, when the battery 1 is placed, the battery 1 can be placed on the V-shaped core layer, that is, the battery 1 will be held by the V-shaped core layer, so that the bottom of the battery 1 will not fall to the ground due to gravity, and the entire part of the battery 1 is on the core layer 5. The height of the bottom of the V-shaped core layer is not lower than the height of the bottom of the sliding plate 4, and the entire surface of the battery 1 can be pressurized, which increases the surface processing area of ​​the battery 1 (the surface is the surface of the battery 1). Figure 1 The battery 1 is shown as having two flat surfaces on the left and right sides. The battery layer 5 is removably fixed between the two sliding plates 4, facilitating replacement of the battery layer 5 (including the buffer layer 6 fixed thereon). When pressure needs to be applied to the surface of the battery 1 to improve its flatness, the driver 3 is activated to push the sliding plates 4, causing each sliding plate 4 to press the battery 1 tightly, thereby evenly applying pressure to the surface of the battery 1 via the buffer layer 6.

[0033] When applying pressure to the surface of the battery 1 to improve the flatness of the battery surface, the battery is a semi-finished product and there is an air bag at the top of the battery. Figure 1 As shown, a portion of the battery 1 that is higher than the sliding plate 4 is an air bag, and the entire battery 1 is between the V-shaped battery core layers, that is, between the sliding plates 4, and pressure can be applied to the entire surface of the battery 1.

[0034] In one embodiment, a force plate 2 is provided between the sliding plate 4 and the first fixed plate 81, and the force plate 2 and the sliding plate 4 (ie Figure 1 As shown, the rightmost sliding plate 4 is fixedly connected, the force applying 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 applying plate 2.

[0035] If the connecting rod is directly fixed to the sliding plate 4, it is necessary to provide a groove or hole in the sliding plate 4, which will affect the surface flatness of the sliding plate 4 and thus affect the uniform transmission of force. The force application plate 2 is provided, and the connecting rod transmits force to the sliding plate 4 through the force application plate 2, which better ensures the uniformity of force transmission on the surface of the sliding plate 4, improves the uniformity of the pressure applied to the surface of the battery 1, ensures that the interior of the battery is evenly flattened, and removes gas at the same time, improving the production quality of the battery.

[0036] In one embodiment, the battery core layer 5 is a periodically arranged V-shaped battery core layer. When the number of periodic arrangements is two, the two V-shaped battery core layers are similar to a W-shaped layer. The W-shaped battery core layer is used as an example to illustrate the structural advantages of the periodically arranged V-shaped battery core layer. Figure 3 As shown, the edges of the V-shaped battery core layer on both sides are fixed on the sliding plate 4. When the battery core layer needs to be removed or replaced, the V-shaped battery core layer has the problem of falling between the two sliding plates 4. If a W-shaped battery core layer is used, at least a part of the W-shaped battery core layer is hung on the sliding plate 4 when it is removed or replaced, so there will be no problem of the W-shaped battery core layer falling between the two sliding plates 4. In addition, the periodically arranged V-shaped battery core layer is easy to process continuously and has low cost. The elastic buffer layer can be reused. If it is fixed on any side of the W-shaped battery core layer, it can be removed or installed in one step. At the same time, the elastic buffer layer and the W-shaped battery core layer are fixed on the pressure device. There is no need to fix the elastic buffer layer and the W-shaped battery core layer separately, and there is no need to fix the V-shaped battery core layer separately, which makes the operation more convenient. For the periodically arranged V-shaped battery core layer, the top edges of the two ends of the battery core layer 5 can be fixed on the top of the sliding plate 4, and the remaining top battery core layer part can be placed on the top of the sliding plate 4, which simplifies the structure and reduces costs.

[0037] In one embodiment, at least two grooves are provided on the top of the sliding plate 4, and at least two holes are provided on both sides of the top edge of the V-shaped battery layer. The V-shaped battery layer is detachably fixed between the sliding plates 4 by the fixing seat 7. The fixing seat 7 and the grooves detachably fix the V-shaped battery layer between the sliding plates 4 in the form of a pin fixation. When the V-shaped battery layer needs to be removed, the fixing seat 7 is pulled out to remove the V-shaped battery layer. Figure 3 As shown, a row of grooves can be provided on the top of the sliding plate 4. This row of grooves increases the flexibility of the sliding plate 4. When batteries of different sizes need to be processed, there is no need to replace the sliding plate 4 due to inappropriate groove positions. A row of corresponding holes is provided on each side edge of the top of the V-shaped battery core layer to increase the application flexibility of the V-shaped battery core layer.

[0038] In one embodiment, adjacent sliding plates 4 are connected by connecting members, and the connecting members are located at the outer edges of the sliding plates 4. Figure 2As shown, a connector is provided on the outer edge of the sliding plate 4 to avoid the problem that the connector is sandwiched between the two sliding plates 4 when the sliding plates 4 are close to each other. Specifically, a bayonet is provided on the outer edge of the sliding plate 4, and the chain 10 passes through the bayonet on each sliding plate 4 in turn, similar to the principle of threading a needle, to connect each sliding plate 4 together. In this way, when the battery pressure operation is completed, when the connecting rod moves toward the driving member end, it will successively drive each sliding plate 4 to move, and the intervals between the sliding plates 4 will gradually become larger. There is no need to manually separate the sliding plates 4, which is more efficient and 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 connectors is set as needed, and the specific number is not limited.

[0039] In one embodiment, the buffer layer 6 is an elastic buffer layer. This layer is more easily deformable and conforms to the microscopic concave and convex surfaces of the battery 1 and the sliding plate 4, allowing the sliding plate 4 to apply uniform pressure to the surface of the battery 1. The area of ​​the buffer layer 6 is larger than that of the battery 1. This allows for better pressure transmission across the entire battery surface, preventing partial cell failure and the resulting degradation of battery processing quality.

[0040] In one embodiment, the sliding plate 4 includes a first sliding plate 41 and a second sliding plate 42. The second sliding plate 42 can slide axially along the guide shaft 9. The first sliding plate 41 and the second sliding plate 42 can be detachably fixed. The battery layer 5 can be detachably fixed between the two first sliding plates 41. By setting the first sliding plate 41 and the second sliding plate 42, the second sliding plate 42 can be slidably sleeved on the guide shaft 9. When it is necessary to replace the sliding plate 4 of different thickness according to the different processing dimensions of the battery, it is only necessary to disassemble the first sliding plate 41. Specifically, as Figure 2 , a vertical groove is provided on the second sliding plate 42, such as Figure 3 As shown, the first sliding plate 41 has a ridge at its end. When the first sliding plate 41 slides downward, the ridge and the vertical groove engage to secure the first sliding plate 41. When the first sliding plate 41 needs to be replaced, it can be simply pulled out, similar to the principle of pulling a drawer. In other embodiments, the sliding plate 4 can also be a single unit, with the end of the sliding plate 4 slidably sleeved onto the guide shaft 9.

[0041] A battery pressurization method includes the following steps: placing a battery 1 into the V-shaped concave surface of a V-shaped battery core layer 5, starting the driving member 3, and moving the connecting rod toward the end away from the driving member 3, thereby shortening the distance between the sliding plates 4. Extrusion occurs between the sliding plates 4, the buffer layer 6, and the battery 1. After the extrusion is completed, the connecting rod moves toward the end close to the driving member 3, and the distance between the sliding plates 4 is increased. The buffer layer 6 has a maximum elastic deformation greater than 30% and a density less than 1g / cm 3The elastic buffer layer can be a sponge buffer layer, an EPE (polyethylene foam) buffer layer, or the like. With this elastic buffer layer, after the external force applied by the driver 3 ends, the internal stress causes the elastic buffer layer to return to its original state, ensuring that the next time the driver 3 is activated, the elastic buffer layer remains consistent with the previous one. The thickness of the sliding plate 4 is 5-50 mm.

[0042] The elastic buffer layer has a thickness of 1-20mm. The thicker the elastic buffer layer, the better the effect. However, increasing the thickness will increase the cost and make it inconvenient to use. The elastic buffer layer should also be suitable for applications where it is too thin, as this will not produce good results. When the elastic buffer layer is 1-20mm thick, it has a better battery pressurization effect.

[0043] The driver 3 applies a pressure of no more than 6 tons. While a cylinder increases pressure more suddenly than a motor, cylinders are less expensive. Compared to a cylinder, a motor increases pressure gradually, rather than suddenly reaching a high value. This improves the production quality of the battery 1, but the cost of the motor is higher. The specific method used can be flexibly selected based on actual circumstances and is not limited here.

[0044] Applying pressure to the plane of a flat object requires that the force on the flat object be evenly distributed on the test surface of the force-bearing body, and all pressures per unit area remain consistent. In the process of converting point force into surface force in the existing flat plate force-bearing structure, it is difficult for the flat plate to achieve absolute flatness due to actual production and processing errors. When the force is transmitted on the flat plate surface, it is usually transmitted to the object being tested through the high points between the force-bearing surfaces, and the low points on the surface of the object being tested cannot be subjected to force.

[0045] like Figure 5 As shown, the sliding plate 4 is not an ideal rigid body with a smooth surface due to machining accuracy. The microscopic surface is uneven, with point B being the low point and point C being the high point. This causes uneven pressure per unit area of ​​each surface of the battery during production, resulting in inconsistent performance per unit area within the battery, leading to a decrease in the quality of the produced batteries and even the appearance of defective products. The buffer layer 6 of this application adopts a maximum elastic deformation greater than 30% and a density less than 1g / cm 3 The elastic buffer layer has a low density, so that there is enough creep space inside the buffer layer 6 ( Figure 5 The horizontal arrow is the creep direction, and the vertical arrow is the force transmission diagram). Therefore, when the high point of the sliding plate 4 is subjected to greater force, the elastic buffer layer will creep toward the part with less pressure, better filling the low point of the sliding plate 4 plane, making the force on the high point equal to the force on the low point, thereby achieving the purpose of uniform pressure transmission from the sliding plate 4 to the battery surface. In actual processing, pressure is applied to both sides of the battery surface. Figure 5The force on one side of the surface is taken as an example.

[0046] Currently, the buffer layer 6 is mostly made of silicone material. Although silicone material also has a certain amount of elastic deformation, when the silicone material is subjected to force and creeps from the high point to the low point, it cannot fill the low point well, resulting in a certain difference in the force applied to the high point and the low point.

[0047] The buffer layer 6 is made of silicone material and the maximum elastic deformation of the present application is greater than 30% and the density is less than 1g / cm 3 The elastic buffer layer has obvious differences in the effect of battery production.

[0048] The test is as follows: Place the pressure-sensitive paper between the battery 1 and the buffer layer 6, start the drive to press, and when the pressure reaches a certain value, the paper surface will turn darker. When the buffer layer 6 is made of silicone material, the high point is subjected to a large force, reaching the pressure-sensitive paper color change value, and the place turns darker. The low point is subjected to a small force, and the pressure-sensitive paper color change value is not reached, and the place does not change color, resulting in uneven color change of the entire board. Figure 6 As shown, the figure is only one of the cases, which is diverse and not unique. When the buffer layer 6 is the elastic buffer layer of the present application, the pressure-sensitive paper almost all turns darker, such as Figure 7 As shown, it is shown that the pressure is evenly transmitted. Therefore, the use of the buffer layer 6 of the present application will improve the production quality of the battery.

[0049] The above examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. Those skilled in the art can make several simple deductions, modifications or substitutions based on the concept of the present invention.

Claims

1. A battery pressurizing device, characterized in that: include: A driving member (3), a sliding plate (4), a core layer (5), a buffer layer (6), a fixing plate (8), a guide shaft (9) and a base; At least two sliding plates (4) are provided, and the sliding plates (4) can slide axially along the guide shaft (9); the battery core layer (5) is V-shaped, and the battery core layer (5) can be detachably fixed between the two sliding plates (4); the V-shaped battery core layer (5) is used to place the battery (1), and the bottom height of the V-shaped battery core layer (5) is not lower than the bottom height of the sliding plate (4); the buffer layer (6) is fixed between the sliding plate (4) and the battery (1); The buffer layer (6) is an elastic buffer layer; the area of ​​the buffer layer (6) is larger than the area of ​​the battery (1), and the buffer layer (6) is arranged on either side of the battery core layer (5); At least two grooves are provided on the top of the sliding plate (4), and at least two holes are provided on both side edges of the top of the V-shaped battery core layer, and the V-shaped battery core layer is detachably fixed between the sliding plates (4) via a fixing seat (7); Fixed plates (8) are respectively provided on both sides of the base, a first fixed plate (81) is provided on one side, and a second fixed plate (82) is provided on the other side, and the guide shaft (9) is fixed between the first fixed plate (81) and the second fixed plate (82); A through hole is provided on the fixing plate (8); the guide shaft (9) is fixed on one side of the first fixing plate (81); the driving member (3) is provided on the other side; a connecting rod of the driving member (3) passes through the through hole and is fixedly connected to the sliding plate (4).

2. The battery pressurizing device according to claim 1, wherein: A force plate (2) is provided between the sliding plate (4) and the first fixed plate (81), the force plate (2) is fixedly connected to the sliding plate (4) on the side close to the driving member (3), the force 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 plate (2).

3. The battery pressurizing device according to claim 1, wherein: The battery core layer (5) is a periodically arranged V-shaped battery core layer.

4. The battery pressurizing device according to claim 1, wherein: Adjacent sliding plates (4) are connected via connecting pieces, and the connecting pieces are located on the outer edges of the sliding plates (4).

5. 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), wherein the second sliding plate (42) can slide axially along the guide shaft (9), and the first sliding plate (41) and the second sliding plate (42) can be detachably fixed.

6. The battery pressurizing device according to claim 5, wherein: The battery core layer (5) is detachably fixed between the two first sliding plates (41).

7. A battery pressurization method, characterized in that: The method uses the battery pressurizing device according to any one of claims 1 to 6, comprising the following steps: placing the battery (1) into the V-shaped concave surface of the V-shaped battery core layer (5), starting the driving member (3), the connecting rod moving toward the end away from the driving member (3), and the distance between the sliding plates (4) being shortened; extrusion occurs between the sliding plates (4), the buffer layer (6) and the battery (1); after the extrusion is completed, the connecting rod moves toward the end close to the driving member (3), and the distance between the sliding plates (4) is enlarged; the buffer layer (6) has a maximum elastic deformation greater than 30% and a density less than 1g / cm 3 elastic buffer layer.

8. The battery pressurization method according to claim 7, wherein: The elastic buffer layer has a thickness of 1-20 mm.

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