CN213599664U

CN213599664U - Lithium ion battery cell baking equipment

Info

Publication number: CN213599664U
Application number: CN202022203592.0U
Authority: CN
Inventors: 胡坤; 王易玮; 许瑞; 肖凯
Original assignee: Dongguan Huiyang Power Technology Co ltd
Current assignee: Dongguan Huiyang Power Technology Co ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-07-02
Anticipated expiration: 2030-09-30

Abstract

The utility model belongs to the technical field of lithium ion battery production, in particular to a lithium ion battery cell baking device, which is used for generating an induction coil of an alternating magnetic field; a power supply electrically connected to the induction coil; and the vacuum accommodating part is used for accommodating the battery cell and is arranged in the alternating magnetic field. The utility model discloses a power provides alternating current for induction coil, induction coil through alternating current produces alternating magnetic field, alternating magnetic field makes the lithium ion battery core pole piece mass flow body that sets up in the vacuum accommodation portion produce the vortex and generate heat, and the mass flow body gives active substance layer with heat transfer after generating heat to realize the rapid heating of pole piece, vacuum accommodation portion starts the evacuation processing simultaneously, not only reduces the boiling point of solvent in the active substance layer, and moist gas also takes away along with the vacuum, thereby toast pole piece and electric core fast. Not only obviously reduces the baking heating time, but also reduces the consumption of heat energy.

Description

Lithium ion battery cell baking equipment

Technical Field

The utility model belongs to the technical field of lithium ion battery produces, especially, relate to a lithium ion battery cell toasts equipment.

Background

In the production of lithium ion power batteries, the lithium ion cells typically need to be baked before the electrolyte is injected. The traditional baking mode is to bake the battery cell by using a vacuum oven, the heating mode is to heat the battery cell by using a traditional heating pipe, the battery cell is heated to a set temperature by thermal field radiation, and meanwhile, the box body is vacuumized to be lower than-101 KPa, so that the moisture in the battery cell is baked. However, the duration of such a baking method is in the order of hours to tens of hours, which severely limits the production efficiency.

In view of the above, it is necessary to provide a technical solution to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: aiming at the defects of the prior art, the lithium ion battery cell baking equipment is provided, the heating time can be reduced, and the consumption of heat energy is reduced.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a lithium ion cell baking apparatus comprising:

an induction coil for generating an alternating magnetic field;

a power supply electrically connected to the induction coil;

and the vacuum accommodating part is used for accommodating the battery cell and is arranged in the alternating magnetic field.

As an improvement of lithium ion battery cell baking equipment, the vacuum accommodating part comprises an airtight tray or an airtight fixture which can accommodate at least one battery cell. In order to improve the vacuum baking efficiency and reduce excessive detection elements, a plurality of battery cells can be arranged in the vacuum accommodating part for baking at the same time.

As an improvement of the lithium ion battery cell baking equipment, the lithium ion battery cell baking equipment further comprises a box body, the induction coil the power supply the vacuum accommodating part is all accommodated in the box body, and the box body is further connected with a gas input assembly. A plurality of temperature zones are arranged in the box body, each temperature zone is provided with at least one group of induction coils, the temperature of the lithium ion battery cell is prevented from being reduced in the tape running process, and the induction coils of the subsequent temperature zones can work to improve the temperature of the lithium ion battery cell. The gas input assembly can input positive-pressure dry air into the box body, and air with water vapor outside the box body is prevented from flowing into the box body, so that the baking effect of the lithium ion battery cell is prevented from being influenced.

As an improvement of lithium ion battery cell toasts equipment, still include controlling means, controlling means includes display and controller, the display set up in the surface of box, the controller with power signal connects. The controller controls the cycle, the size and the frequency of the alternating current generated by the power supply, so that the heat productivity of the pole piece current collector is controlled. The water content in the positive plate and the negative plate is generally different, and the controller can adjust the alternating current generated by the power supply according to the type and the size of the plate.

As a lithium ion cell toasts an improvement of equipment, still include vacuum control system, vacuum control system includes evacuation subassembly and vacuum monitoring subassembly, the evacuation subassembly with the vacuum holds the portion and connects, the evacuation subassembly with the controller electricity is connected, vacuum monitoring subassembly respectively with the controller with display signal connects. In practical application, the vacuum degree monitoring assembly is used for monitoring the vacuum degree inside the vacuum accommodating part and is connected with the display through a signal, the display can display the vacuum degree inside the vacuum accommodating part, and the controller can control the vacuumizing assembly to enable the vacuum degree inside the vacuum accommodating part to meet the actual requirement. Specifically, the controller compares the detected vacuum value with a set value, and then determines whether the vacuum accommodating part needs to be subjected to vacuum compensation or not, so that the closed-loop control of the vacuum degree is realized.

As an improvement of lithium ion battery cell toasts equipment, still include temperature sensor, temperature sensor with vacuum hold portion is connected, temperature sensor respectively with the display with controller signal connection. And when the temperature sensor senses the set temperature of the battery core, the controller controls the power supply to stop working. When the actual temperature of the battery cell sensed by the temperature sensor is lower than the set temperature, the controller controls the power supply to be turned on, the induction coil works to bake the lithium ion battery cell, and closed-loop control between the temperature and the heating of the induction coil is realized.

As an improvement of lithium ion battery cell toasts equipment, still include dew point test system, dew point test system includes dew point test subassembly and dew point monitoring subassembly, the dew point test subassembly with the vacuum hold phase is connected, the dew point monitoring subassembly respectively with the controller with display signal connects. Dew point test component can detect the inside dew point of vacuum accommodation portion, and the dew point that dew point monitoring component will sense passes through signal transmission to controller, and the controller judges whether need continue to the inside evacuation of vacuum accommodation portion.

As a lithium ion battery cell toasts an improvement of equipment, still include with controller signal connection's conveying system, conveying system includes the material loading conveyer belt, toasts conveyer belt, qualified conveyer belt, unqualified conveyer belt and unloading conveyer belt, the material loading conveyer belt with toast the conveyer belt and be connected, toast the conveyer belt respectively with qualified conveyer belt with unqualified conveyer belt is connected, qualified conveyer belt with the unloading conveyer belt is connected, unqualified conveyer belt with the material loading conveyer belt is connected. After the battery cell is loaded from the loading conveyor belt, the battery cell is conveyed to the baking conveyor belt to be baked, after the dew point reaches a set value, the battery cell is judged to be baked qualified, and the battery cell is conveyed from the qualified conveyor belt to the unloading conveyor belt to be unloaded. And if the dew point does not reach the set value, judging that the battery cell is unqualified in baking, and returning the battery cell to the feeding conveyor belt from the unqualified conveyor belt to bake again.

As an improvement of the lithium ion battery cell baking equipment, the material of the vacuum containing part is metal. The material of vacuum accommodation portion sets up to metal or the good material of heat conductivity, also can generate heat, and then gives the holding with the heat transfer and in electric core wherein, realizes the rapid heating of electric core.

Compared with the prior art, the utility model discloses following beneficial effect has at least: the utility model provides a lithium ion battery cell toasts equipment, include: an induction coil for generating an alternating magnetic field; a power supply electrically connected to the induction coil; and the vacuum accommodating part is used for accommodating the battery cell and is arranged in the alternating magnetic field. The utility model discloses a power provides alternating current for induction coil, induction coil through alternating current produces alternating magnetic field, alternating magnetic field makes the lithium ion battery core pole piece mass flow body that sets up in the vacuum accommodation portion produce the vortex and generate heat, and the mass flow body gives active substance layer with heat transfer after generating heat to realize the rapid heating of pole piece, vacuum accommodation portion starts the evacuation processing simultaneously, not only reduces the boiling point of solvent in the active substance layer, and moist gas also takes away along with the vacuum, thereby toast pole piece and electric core fast. Not only obviously reduces the baking heating time, but also reduces the consumption of heat energy.

Drawings

FIG. 1 is a schematic structural diagram of a baking device for a lithium ion cell in an embodiment.

Fig. 2 is a schematic structural diagram of a conveying system in the embodiment.

FIG. 3 is a signal connection diagram of the baking equipment for lithium ion cells in the embodiment.

Wherein: the device comprises an induction coil 1, a power supply 2, a vacuum accommodating part 3, a controller 4, a battery core 5, a vacuum pumping assembly 61, a vacuum degree monitoring assembly 62, a temperature sensor 7, a dew point testing assembly 81, a dew point monitoring assembly 82, a conveying system 9, a feeding conveying belt 91, a baking conveying belt 92, a qualified conveying belt 93, a unqualified conveying belt 94 and a blanking conveying belt 95.

Detailed Description

As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, within which a person skilled in the art can solve the technical problem to substantially achieve the technical result.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", horizontal "and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The present invention will be described in further detail with reference to the accompanying drawings, which are not intended to limit the present invention.

Examples

As shown in fig. 1 to 3, the present embodiment provides a lithium ion battery baking apparatus, including:

an induction coil 1 for generating an alternating magnetic field;

a power supply 2 electrically connected to the induction coil 1;

and the vacuum accommodating part 3 is used for accommodating the battery cell 5 and is arranged in the alternating magnetic field.

The utility model discloses a power 2 provides alternating current for induction coil 1, induction coil 1 through alternating current produces alternating magnetic field, alternating magnetic field makes the 5 pole pieces mass flow of lithium ion cell 5 pole pieces that set up in vacuum holding portion 3 produce the vortex and generate heat, the mass flow generates heat the back with heat transfer for active substance layer, thereby realize the rapid heating of pole piece, vacuum holding portion 3 starts vacuum-pumping simultaneously and handles, not only reduce the boiling point of solvent in the active substance layer, moist gas also takes away along with the vacuum, thereby toast pole piece and electric core 5 fast. Not only obviously reduces the baking heating time, but also reduces the consumption of heat energy.

Further, the vacuum accommodating portion 3 includes a hermetic tray or a hermetic jig that can accommodate at least one battery cell 5. In order to increase the efficiency of the vacuum baking and to reduce the number of detection elements, a plurality of cells 5 may be disposed in the vacuum container 3 and baked at the same time.

Further, still include the box, induction coil 1, power 2, vacuum container portion 3 all hold in the box, and the box still is connected with gas input assembly. A plurality of temperature zones are arranged in the box body, each temperature zone is provided with at least one group of induction coils 1, the temperature of the lithium ion battery cell 5 is prevented from being reduced in the tape running process, and the induction coils 1 in the subsequent temperature zones can work to improve the temperature of the lithium ion battery cell 5. The gas input assembly can input positive-pressure dry air into the box body, and air with water vapor outside the box body is prevented from flowing into the box body, so that the baking effect of the lithium ion battery cell is prevented from being influenced.

Further, the device also comprises a control device, the control device comprises a display and a controller 4, the display is arranged on the surface of the box body, and the controller 4 is in signal connection with the power supply 2. The controller 4 controls the cycle, the size and the frequency of the alternating current generated by the power supply 2, so as to control the heat productivity of the pole piece current collector. The water content in the positive and negative plates is generally different, and the controller 4 can adjust the alternating current generated by the power supply 2 according to the type and size of the plates.

Further, the vacuum control system is further included, the vacuum control system comprises a vacuumizing assembly 61 and a vacuum degree monitoring assembly 62, the vacuumizing assembly 61 is connected with the vacuum accommodating part 3, the vacuumizing assembly 61 is electrically connected with the controller 4, and the vacuum degree monitoring assembly 62 is respectively in signal connection with the controller 4 and the display. In practical application, the vacuum degree monitoring assembly 62 is used for monitoring the vacuum degree inside the vacuum accommodating part 3 and is connected to a display through a signal, the display can display the vacuum degree inside the vacuum accommodating part 3, and the controller 4 can control the vacuumizing assembly 61 to enable the vacuum degree inside the vacuum accommodating part 3 to meet actual requirements. Specifically, the controller 4 determines whether the vacuum accommodating part 3 needs to be subjected to vacuum compensation or not after comparing the detected vacuum value with a set value, so as to realize closed-loop control of the vacuum degree.

Further, the vacuum container further comprises a temperature sensor 7, wherein the temperature sensor 7 is connected with the vacuum container 3, and the temperature sensor 7 is respectively in signal connection with the display and the controller 4. When the temperature sensor 7 senses the set temperature of the battery cell 5, the controller 4 controls the power supply 2 to stop working. When the temperature sensor 7 senses that the actual temperature of the battery cell 5 is lower than the set temperature, the controller 4 controls the power supply 2 to be turned on, the induction coil 1 works to bake the lithium ion battery cell 5, and closed-loop control between the temperature and the heating of the induction coil 1 is realized.

Further, the dew point testing device comprises a dew point testing system, wherein the dew point testing system comprises a dew point testing component 81 and a dew point monitoring component 82, the dew point testing component 81 is connected with the vacuum accommodating part 3, and the dew point monitoring component 82 is in signal connection with the controller 4 and the display respectively. The dew point testing component 81 can detect the dew point inside the vacuum accommodating part 3, the dew point monitoring component 82 transmits the sensed dew point to the controller 4 through a signal, and the controller 4 judges whether the inside of the vacuum accommodating part 3 needs to be vacuumized continuously or not.

Further, the automatic baking and conveying device further comprises a conveying system 9 in signal connection with the controller 4, the conveying system 9 comprises a feeding conveying belt 91, a baking conveying belt 92, a qualified conveying belt 93, an unqualified conveying belt 94 and a discharging conveying belt 95, the feeding conveying belt 91 is connected with the baking conveying belt 92, the baking conveying belt 92 is respectively connected with the qualified conveying belt 93 and the unqualified conveying belt 94, the qualified conveying belt 93 is connected with the discharging conveying belt 95, and the unqualified conveying belt 94 is connected with the feeding conveying belt 91. After the battery cell 5 is loaded from the loading conveyor belt 91, the battery cell 5 is conveyed to the baking conveyor belt 92 to be baked, when the dew point reaches a set value, the battery cell 5 is judged to be baked qualified, and the battery cell 5 is conveyed from the qualified conveyor belt 93 to the blanking conveyor belt 95 to be blanked. And if the dew point does not reach the set value, judging that the battery cell 5 is unqualified in baking, and returning the battery cell 5 to the feeding conveyor belt 91 from the unqualified conveyor belt 94 for re-baking.

Further, the material of the vacuum chamber 3 is metal. The material of vacuum accommodation portion 3 sets up to metal or the good material of heat conductivity, also can generate heat, and then gives the electric core 5 of holding wherein with heat transfer, realizes electric core 5's rapid heating.

The utility model discloses a work flow does:

s1, the battery cell 5 is fixed in the vacuum container 3 by the feeding conveyor belt 91;

s2, the controller 4 controls the vacuum accommodating part 3 to the baking conveyor belt 92, the controller 4 controls the power supply 2 to electrify the induction coil 1 to form an alternating magnetic field, the baking conveyor belt 92 conveys the vacuum accommodating part 3 to the alternating magnetic field, the vacuum accommodating part 3 and the battery cell 5 current collector therein are rapidly heated, and meanwhile, the controller 4 controls the vacuumizing assembly 61 to vacuumize the inside of the vacuum accommodating part 3 to a set vacuum degree less than or equal to-101 Kpa; after a temperature sensor 7 in the vacuum accommodating part 3 senses that the temperature reaches a set temperature, a signal is transmitted to the controller 4, and the controller 4 controls the alternating power supply to stop working;

s3, the dew point testing component 81 tests the dew point inside the vacuum containing part 3, the dew point monitoring component 82 transmits a dew point signal to the controller 4, the controller 4 judges whether the dew point detection is qualified, the vacuum containing part 3 with qualified dew point is conveyed to the blanking conveyor belt 95 through the qualified conveyor belt 93, and the vacuum containing part 3 with unqualified dew point returns to the blanking conveyor belt 91 through the unqualified conveyor belt 94 to be baked again. Through using the baking equipment, the baking time is shortened to within 2 hours from twelve hours, and the electricity consumption is original 80%.

Variations and modifications to the above-described embodiments may become apparent to those skilled in the art from the disclosure and teachings of the above description. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious modifications, replacements or variations made by those skilled in the art on the basis of the present invention belong to the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims

1. A lithium ion cell baking apparatus, comprising:

an induction coil for generating an alternating magnetic field;

a power supply electrically connected to the induction coil;

2. The lithium ion battery cell baking apparatus of claim 1, wherein the vacuum accommodating portion comprises a hermetic tray or a hermetic clamp that can accommodate at least one battery cell.

3. The lithium ion battery cell baking equipment according to claim 1, further comprising a box body, wherein the induction coil, the power supply and the vacuum accommodating part are all accommodated in the box body, and the box body is further connected with a gas input assembly.

4. The lithium ion battery cell baking equipment according to claim 3, further comprising a control device, wherein the control device comprises a display and a controller, the display is arranged on the surface of the box body, and the controller is connected with the power supply signal.

5. The lithium ion battery cell baking equipment according to claim 4, further comprising a vacuum control system, wherein the vacuum control system comprises a vacuum pumping assembly and a vacuum degree monitoring assembly, the vacuum pumping assembly is connected with the vacuum accommodating part, the vacuum pumping assembly is electrically connected with the controller, and the vacuum degree monitoring assembly is in signal connection with the controller and the display respectively.

6. The li-ion cell baking apparatus of claim 4, further comprising a temperature sensor connected to the vacuum containing portion, the temperature sensor being in signal connection with the display and the controller, respectively.

7. The lithium ion battery cell baking apparatus according to claim 4, further comprising a dew point testing system, wherein the dew point testing system comprises a dew point testing component and a dew point monitoring component, the dew point testing component is connected to the vacuum container, and the dew point monitoring component is in signal connection with the controller and the display, respectively.

8. The lithium ion battery cell baking equipment according to claim 4, further comprising a conveying system in signal connection with the controller, wherein the conveying system comprises a feeding conveying belt, a baking conveying belt, a qualified conveying belt, an unqualified conveying belt and a blanking conveying belt, the feeding conveying belt is connected with the baking conveying belt, the baking conveying belt is respectively connected with the qualified conveying belt and the unqualified conveying belt, the qualified conveying belt is connected with the blanking conveying belt, and the unqualified conveying belt is connected with the feeding conveying belt.

9. The li-ion cell baking apparatus of claim 1, wherein the vacuum container is made of metal.