Background
The new energy automobile is rapidly developed, the national policy is changed, and the whole industry is superior. At present, the whole new energy automobile industry is more and more competitive, the cost pressure of the new energy automobile is gradually increased, and a lithium battery is used as an important component of the new energy automobile, so that a more efficient and lower-cost production method is required to be found to effectively reduce the production cost of the lithium battery.
The lithium cell need dry to the lithium cell in process of production, prevents the influence of moisture to the lithium cell. At present, the lithium battery vacuum drying box is generally adopted for drying the lithium battery. The batch lithium batteries are placed in the restraint plate and placed in a lithium battery vacuum drying box for vacuum drying, and the lithium batteries are taken out after the vacuum drying and transferred to the next processing procedure. Because a certain amount of moisture also exists in the air, the lithium battery is taken out of the lithium battery vacuum drying box and then contacts the air, the moisture in the air can enter the battery again, and the drying effect is greatly reduced. In order to solve the problem, in the prior art, a vacuum drying oven for lithium batteries is placed in a large drying chamber, and the lithium batteries are transferred to a working chamber for the next process and all need to be dried. Thus, maintaining a dry environment in a plurality of working rooms requires equipment that can dry in a large space, and the energy consumption thereof is high, and the production cost of lithium batteries is self-evident.
Disclosure of Invention
The invention aims to solve the technical problem of providing a vacuum heating and drying device for a lithium battery aiming at the defects of the prior art.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the vacuum heating drying device for the lithium battery comprises a shell and a cover plate, wherein the cover plate is detachably arranged at an opening at the upper end of the shell, and a vacuum heating cavity is enclosed by the shell and the cover plate; a vacuum butt valve and a power supply interface are arranged on the outer side of the vacuum heating cavity; a cover plate electricity connection assembly is arranged between the shell and the cover plate; the shell and the cover plate are internally provided with a plurality of heating elements and corresponding temperature sensors.
In the technical scheme, the cover plate and the bottom surface of the shell extend towards the same side to form a connecting and placing platform, the connecting and placing platform is provided with a temperature controller, and the temperature controller is connected with all heating elements and temperature sensors; the cover plate electricity connection assembly is arranged on the connection placing platform and comprises a PIN needle plate and a PCB butt-joint plate, and when the cover plate covers the shell, the PIN needle plate is connected with the PCB butt-joint plate and conducted.
In the technical scheme, a battery separation component is arranged on the inner side of the shell.
According to the technical scheme, one end of a power interface is connected with a heating element, a temperature sensor and a cover plate electricity connection assembly in a shell, the heating element and the temperature sensor of the cover plate are connected through the cover plate electricity connection assembly, and the other end of the power interface is connected with an external power supply and electric control.
In the technical scheme, the vacuum butt valve is connected with the vacuum heating cavity and is in a normally closed state, the vacuum butt valve can be in butt joint with an external vacuum source, and the vacuum butt valve is opened to enable the vacuum heating cavity to be communicated with the external vacuum source.
In the technical scheme, the upper end opening of the shell is provided with a positioning mechanism, and the cover plate is correspondingly connected with the shell through the positioning mechanism.
In the technical scheme, the outer sides of the shell and the cover plate are provided with heat-insulating layers.
In the technical scheme, a sealing ring is arranged between the cover plate and the shell.
In the technical scheme, the lower end surface of the shell is provided with a supporting base.
In the technical scheme, handles are arranged on two side faces of the shell.
The invention has the beneficial effects that: the vacuum heating and drying device for the lithium battery can transfer the battery to the next procedure in the drying state of the battery after vacuum heating and drying the battery, has no requirement on the environment of a drying chamber during drying, and reduces the production cost for maintaining the drying environment of the drying chamber.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1-4, a lithium battery vacuum heating drying device has a main structure of a rectangular parallelepiped structure, the rectangular parallelepiped structure includes a casing 1 and a cover plate 2, the upper end opening and the inside of the casing 1 are vacant, the cover plate 2 is detachably mounted at the upper end opening of the casing 1 to close the upper end opening of the casing 1, and the casing 1 and the cover plate 2 enclose a vacuum heating cavity 14 for vacuum heating of a battery. The inside of the case 1 is provided with a battery partition member 15 to partition and heat the batteries 9 one by one. In order to improve the sealing performance between the shell 1 and the cover plate 2, a sealing ring 4 is arranged on the connecting sealing edge of the shell 1 and the cover plate 2. The vacuum heating and drying device for the lithium battery carries out taking and placing of the battery 9 by disassembling the cover plate 2 and the shell 1. At least 2 positioning mechanisms 5 are arranged on the opening sealing edge at the upper end of the shell 1, the 2 positioning mechanisms 5 are respectively arranged on two opposite angles of the square sealing edge, 2 corresponding corner positions on the cover plate 2 are matched with the 2 positioning mechanisms 5 on the shell 1, the cover plate 2 and the shell 1 can be correspondingly connected, and the cover plate 2 and the shell 1 can be accurately aligned with each other when needing to be sealed. More than 2 positioning mechanisms 5 can also be provided at the remaining two corners of the housing 1.
Lithium cell vacuum heating drying device adopts six heating structures, all is equipped with a plurality of heating element that are used for the heating and a plurality of temperature sensor that are used for the temperature measurement in five face-pieces of casing 1 and apron 2. The heating element can adopt a heating sheet or a heating rod and the like.
And a vacuum butt joint valve 11 and a power supply interface 12 are arranged on the outer side of the vacuum heating cavity 14. The vacuum docking valve 11 is used to connect an external vacuum source to the vacuum heating chamber 14. Referring to fig. 5, the vacuum heating and drying device for lithium battery is disposed at the upper end of a power and vacuum source socket board 10, the power and vacuum source socket board 10 is provided with a vacuum source connector 101 corresponding to the vacuum docking valve 11, and the other end of the vacuum source connector 102 is an external vacuum source (not shown); the power supply and vacuum source plugboard 10 is provided with a power supply PIN needle 102 corresponding to the power supply interface 12, and the power supply PIN needle 102 is inserted into the power supply interface 12 to be conducted. The vacuum butt valve 11 is in a normally closed state, the vacuum butt valve 11 is opened after being butted with the vacuum source joint 102, the vacuum heating cavity 14 is communicated with an external vacuum source, and the external vacuum source vacuumizes the vacuum heating cavity 14 and takes out moisture in the vacuum heating cavity 14; power source 12 is connected with external power source and switches on, and power source 12 connects every heating element and temperature sensor in apron 2 and the casing 1, and external power source connects power source 12 and supplies power for the electric elements in the lithium cell vacuum heating drying device. One end of the power interface 12 is connected with the heating element and the temperature sensor in the shell 1 and the cover plate 2, and the other end of the power interface 12 is connected with an external power supply and electric control. The lower terminal surface of casing 1 still is equipped with supports base 13, supports base 13 and is used for placing of lithium cell vacuum heating drying device to support, and the bottom of supporting base 13 also is equipped with the connecting hole that fixed connection used, can carry out fixed connection according to placing the installation demand of lithium cell vacuum heating drying device.
Between the cover plate 2 and the bottom surface of the casing, except for a space for enclosing a vacuum heating cavity 14 with the casing 1, on one side of the casing 1, the cover plate 2 and the bottom surface of the casing extend towards the same direction to form a connecting and placing platform for placing connecting parts and control parts, and a cover plate electricity connection assembly 3 and a temperature controller 6 are arranged on the connecting and placing platform. The cover plate electricity connecting component 3 is used for connecting a heating element and a temperature sensor in the cover plate 2 to a power supply, the cover plate electricity connecting component 3 comprises a PIN needle plate 31 and a PCB butt-joint plate 32, the PIN needle plate 31 is fixed at the lower end of an extending surface of the cover plate 2 connected with the placing platform, the PCB butt-joint plate 32 is fixed at the upper end of the extending surface of the bottom surface of the shell 1, the PIN needle plate 31 corresponds to the PCB butt-joint plate 32, and when the cover plate 2 is covered on the shell 1, the PIN needle plate 31 is connected with the PCB butt. The PCB docking board 32 is connected to the power interface 12 through a circuit in the housing 1, so as to energize the heating element and the temperature sensor in the cover plate 2.
The temperature controller 6 is used for controlling the heating temperature of the lithium battery vacuum heating and drying device. The temperature controller 6 is connected with the power interface 12, and the temperature controller 6 is connected with all heating elements and temperature sensors on the lithium battery vacuum heating and drying device. As shown in fig. 6, a plurality of sensor insertion holes 61 and a plurality of heating element insertion holes 62 are provided in the five face shells of the cover plate 2 and the housing 1, the sensor insertion holes 61 are provided adjacent to the heating element insertion holes 62, temperature sensors are provided in the sensor insertion holes 61, and heating elements are provided in the heating element insertion holes 62. The temperature controller 6 adjusts the heating state of the corresponding heating element according to the temperature data of each temperature sensor, so that the temperature of the whole vacuum heating cavity 14 is kept at a relatively stable value, and the influence on the vacuum drying efficiency of partial batteries caused by abnormal local temperature in the vacuum heating cavity 14 is avoided. The temperature controller 6 generally controls the heating temperature of the lithium battery vacuum heating and drying device to be 80-110 ℃.
In the vacuum heating cavity 14, the battery separation components 15 on the bottom surface of the shell 1 are a plurality of side plates which are arranged at equal intervals, and the batteries 9 are clamped between every two side plates. Furthermore, the side plates are divided into a front end side plate and a rear end side plate which are respectively arranged at the front end and the rear end of the vacuum heating cavity 14, the side plates at each end are arranged in an equidistant and orderly manner, the side plates at the front end and the rear end correspond to each other one by one, one end of the battery 9 is clamped between the two side plates at the front end of the vacuum heating cavity 14, the other end of the battery 9 is clamped between the two corresponding side plates at the rear end of the vacuum heating cavity 14, and the middle part of the battery 9 is in full contact with the space of the vacuum heating cavity 14 so as.
Further, in order to improve the energy utilization rate of the lithium battery vacuum heating and drying device, the heat preservation layers 7 are arranged on the outer surfaces of the cover plate 2 and the shell 1, the heat preservation layers 7 on the six outer surfaces of the lithium battery vacuum heating and drying device wrap the whole vacuum heating cavity 14, and heat loss in the vacuum heating cavity 14 is reduced.
Further, handles 8 for taking the lithium battery vacuum heating and drying device are arranged at the front end and the rear end of the shell 1, so that manual transfer of the lithium battery vacuum heating and drying device is facilitated.
The application of the lithium battery vacuum heating drying device comprises the following steps:
the vacuum heating and drying device for the lithium battery opens the cover plate 2, puts the battery 9 to be subjected to vacuum heating and drying between the battery separating assemblies 15 in the vacuum heating cavity 14, and covers the cover plate 2 on the shell 1 again.
The power interface 12 is connected with an external power supply and supplies power to the temperature sensor, the heating element and the temperature controller 6, the heating element heats the vacuum heating cavity 14 through six outer surfaces of the lithium battery vacuum heating and drying device, and the temperature controller 6 controls the heating state of the heating element through temperature information fed back by the temperature sensor; the vacuum butt valve 11 is connected to an external vacuum source and opened, the external vacuum source vacuumizes the vacuum heating cavity 14, and simultaneously, moisture dried by the battery 9 is pumped out of the vacuum heating cavity 14.
After the vacuum heating and drying are finished, the vacuum butt valve 11 is closed, the vacuum butt valve 11 is disconnected with an external vacuum source, and the external power source is also disconnected with the power interface 12. The vacuum heating and drying device for the lithium battery is still kept in a vacuum state, and the whole vacuum heating and drying device for the lithium battery is transferred to the next procedure and then taken out in a manual or mechanical transfer mode. Therefore, in the production process, a drying room is not required to be specially provided for the lithium battery vacuum heating and drying device, the dried battery 9 can be conveniently and quickly transferred along with the lithium battery vacuum heating and drying device, and the drying effect of the battery 9 is effectively ensured.
The above examples are intended to illustrate rather than to limit the invention, and all equivalent changes and modifications made by the methods described in the claims of the present invention are intended to be included within the scope of the present invention.