Drying oven device for battery baking

Abstract

The utility model relates to an oven device for baking a battery. The oven device for baking the battery comprises a vacuum oven, a micro-water sensor and a controller, wherein the vacuum oven is used for baking the battery in vacuum; the micro-water sensor is arranged in the vacuum oven and is used for detecting the real-time water content in the vacuum oven; the controller is connected with the vacuum oven and the micro-water sensor, the controller is used for obtaining the real-time water content in the vacuum oven, and if the real-time water content is lower than a preset value and is maintained to be smaller than or equal to the preset value for preset time, the controller controls the vacuum oven to stop working. The oven device for baking the battery can detect the water content of the battery on line in real time.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy, in particular to a baking oven device for battery baking. Background Art

[0002] In recent years, lithium batteries have developed rapidly in the electric vehicle industry and the electronic equipment industry due to their advantages such as high operating voltage, high specific energy, low self-discharge, and long cycle life. In the manufacturing process of lithium-ion batteries, since water will have a serious impact on the safety of the electrolyte and battery, a battery baking process is added to reduce the water content. The water content test usually places a fake battery in a normal battery for baking. After the baking is completed, the fake battery is manually taken out and sent for testing of the water content. Based on the water content results of the fake battery cell, it is manually determined whether the baking is over or continues. This test method is an offline detection method with a complex process, high manual operation cost, large result error, and the need to equip the battery with fake cells, resulting in low baking efficiency and high cost consumption, thereby reducing the overall production efficiency of the battery. Utility Model Content

[0003] Based on this, it is necessary to provide a battery baking oven device that can detect the water content of the battery online in real time to address the above problems.

[0004] A battery baking oven device, comprising:

[0005] Vacuum ovens for vacuum baking batteries; and

[0006] a micro-water sensor, disposed in the vacuum oven, for detecting the real-time water content in the vacuum oven; and

[0007] A controller is connected to the vacuum oven and the micro-water sensor respectively, and is used to obtain the real-time water content in the vacuum oven. If the real-time water content is lower than a preset value and the real-time water content is maintained at a value less than or equal to the preset value for a preset time, the controller controls the vacuum oven to stop working.

[0008] In one embodiment, the controller is used to control the micro-water sensor to detect the real-time water content in the vacuum oven at predetermined intervals.

[0009] In one embodiment, the micro-water sensor includes a capacitance unit, a capacitance acquisition unit and a calculation unit, the capacitance unit includes a first parallel plate and a second parallel plate arranged opposite to each other, the capacitance acquisition unit is connected to the capacitance unit, and is used to acquire the capacitance between the first parallel plate and the second parallel plate, the calculation unit is connected to the capacitance acquisition unit, and is used to calculate the water content according to the capacitance acquired by the capacitance acquisition unit, and the calculation unit is connected to the controller.

[0010] In one embodiment, the controller is located outside the vacuum oven.

[0011] In one embodiment, a heating jig is provided in the vacuum oven, the heating jig is connected to the controller, and the heating jig is used to carry and bake the battery.

[0012] In one embodiment, in the height direction of the vacuum oven, the micro-water sensor is disposed on the inner wall of the top wall of the vacuum oven, and the controller is disposed on the outer wall of the top wall of the vacuum oven.

[0013] In one embodiment, the heating jig has a plurality of receiving grooves and a plurality of heating elements, the plurality of heating elements are arranged one-to-one with the plurality of receiving grooves, and the plurality of heating elements are respectively connected to the controller, and each of the receiving grooves is used to accommodate a battery.

[0014] In one embodiment, within a horizontal plane defined by the length direction and the width direction of the vacuum oven, the plurality of receiving grooves are arranged in an array; and / or

[0015] There are multiple heating jigs, and the multiple heating jigs are arranged in the height direction of the vacuum oven.

[0016] In one embodiment, a fixing frame is provided in the vacuum oven, and the fixing frame includes a base and a fixing seat, and the fixing seat is suspended above the vacuum oven through the base, and the heating jig is provided on a side of the fixing seat away from the base.

[0017] In one embodiment, the vacuum oven comprises a box body and a door for sealing or opening the box body;

[0018] The inner wall of the box is provided with a heater, and the heater is connected to the controller; and / or

[0019] The bottom of the box is provided with moving wheels, and the moving wheels include fixed casters and universal casters arranged at the bottom of the box.

[0020] In the above-mentioned oven device for baking batteries, a micro-water sensor capable of detecting the real-time water content in the vacuum oven is provided in the vacuum oven, so that the controller connected to the micro-water sensor can judge whether to stop baking the battery or continue baking the battery according to the real-time water content in the vacuum oven. When the real-time water content in the vacuum oven is lower than the preset value and the real-time water content is maintained at a value less than or equal to the preset value for a preset time, the controller controls the vacuum oven to stop working, and it can be judged that the battery has been baked (it can be judged that the water content of the battery has met the specification requirements, that is, it meets the factory requirements). Therefore, the above-mentioned oven device for baking batteries can detect the water content of the battery online in real time, without the need to set up a fake battery cell for measuring the water content, increasing the number of batteries that can be baked in the vacuum oven, and after the baking is completed, there is no need to manually take the battery for sampling and testing the water content, thereby reducing labor costs, improving baking efficiency, and thus reducing the overall production cost of the battery and improving the overall production efficiency of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of a battery baking oven device in a preferred embodiment of the utility model;

[0023] Figure 2 for Figure 1 A cross-sectional view of an oven device for baking a battery as shown;

[0024] Figure 3 for Figure 1 The module diagram of the micro-water sensor and controller of the battery baking oven device is shown. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0031] like Figure 1 and Figure 2 As shown, the utility model discloses an oven device 10 for battery baking. The oven device 10 for battery baking includes a vacuum oven 300, a micro-water sensor 400 and a controller 500. The vacuum oven 300 is used for vacuum baking the battery 20. The micro-water sensor 400 is arranged in the vacuum oven 300. The micro-water sensor 400 is used to detect the real-time water content in the vacuum oven 300. The controller 500 is connected to the vacuum oven 300 and the micro-water sensor 400 respectively. The controller 500 is used to obtain the real-time water content in the vacuum oven 300. If the real-time water content is lower than a preset value and the real-time water content is maintained at a value less than or equal to the preset value for a preset time, the controller 500 controls the vacuum oven 300 to stop working.

[0032] When the vacuum oven 300 is used to vacuum bake the battery 20, the moisture of the battery 20 will enter the vacuum oven 300. As the baking continues, the moisture of the battery 20 will gradually decrease, and the moisture in the vacuum oven 300 will also gradually decrease. When the real-time water content in the vacuum oven 300 is lower than the preset value and the value of the real-time water content is stable for a period of time (preset time), that is, when the real-time water content in the vacuum oven 300 is lower than the preset value and the real-time water content is maintained at less than or equal to the preset value for a preset time, it can be determined that the battery 20 has been baked (it can be determined that the water content of the battery 20 has met the specification requirements, that is, it meets the factory requirements), so that the vacuum oven 300 can be controlled to stop working.

[0033] In the above-mentioned battery baking oven device 10, a micro-water sensor 400 capable of detecting the real-time water content in the vacuum oven 300 is provided in the vacuum oven 300, so that the controller 500 connected to the micro-water sensor 400 can determine whether to stop baking the battery 20 or continue baking the battery 20 according to the real-time water content in the vacuum oven 300. When the real-time water content in the vacuum oven 300 is lower than the preset value and the real-time water content is maintained at a value less than or equal to the preset value for a preset time, the controller 500 controls the vacuum oven 300 to stop working, and it can be judged that the battery 20 has been baked (it can be judged that the water content of the battery 20 has met the specification requirements, that is, it meets the factory requirements). Therefore, the above-mentioned battery baking oven device 10 can detect the water content of the battery 20 online in real time, without the need to set up a dummy battery cell for measuring the water content, and increase the number of batteries 20 that can be baked in the vacuum oven 300. After the baking is completed, there is no need to manually take the battery 20 for sampling and testing the water content, which reduces labor costs and improves baking efficiency, thereby reducing the overall production cost of the battery 20 and improving the overall production efficiency of the battery 20.

[0034] It should be noted that the above-mentioned preset value and the above-mentioned preset time can be obtained according to experiments. For example, assuming that the water content of the battery 20 needs to be less than or equal to a% before it can be shipped, at this time, a battery 20 with a water content of a% (a battery 20 with a water content of a% can be obtained by traditional means) can be placed in the above-mentioned battery baking oven device 10 and baked, and the real-time water content in the vacuum oven 300 detected by the micro-water sensor 400 can be used as the preset value. Of course, multiple experiments can also be performed on the same batch of batteries 20 to obtain multiple preset values, and then the calculated average value is used as the final preset value.

[0035] The above-mentioned preset time can also be obtained through experiments. For example, based on the preset value obtained through the above-mentioned experiment, the preset value at multiple time points is recorded, and the preset time can be a time point when the preset value does not fluctuate or fluctuates very little over time. Of course, multiple experiments can also be performed on the same batch of batteries 20 to obtain multiple preset times, and then the calculated average value is used as the final preset time.

[0036] In this embodiment, the controller 500 is used to control the micro-water sensor 400 to detect the real-time water content in the vacuum oven 300 at predetermined intervals. In this way, the vacuum oven 300 can be stopped in time after the water content of the battery 20 meets the requirement, thereby avoiding the vacuum oven 300 from continuing to bake and doing useless work, further reducing the overall production cost of the battery 20 and improving the overall production efficiency of the battery 20. The predetermined time can be flexibly set according to actual conditions, and can be one minute, five minutes or ten minutes.

[0037] In this embodiment, if Figure 3As shown, the micro-water sensor 400 includes a capacitor unit 410, a capacitor acquisition unit 420 and a calculation unit 430. The capacitor unit 410 includes a first parallel plate 412 and a second parallel plate 414 arranged opposite to each other. The capacitor acquisition unit 420 is connected to the capacitor unit 410 and is used to acquire the capacitance between the first parallel plate 412 and the second parallel plate 414. Specifically, in this embodiment, the capacitor acquisition unit 420 acquires the capacitance between the first parallel plate 412 and the second parallel plate 414 at predetermined intervals. The calculation unit 430 is connected to the capacitor acquisition unit 420 and is used to calculate the water content according to the capacitance acquired by the capacitor acquisition unit 420. The calculation unit 430 is connected to the controller 500.

[0038] In the process of baking the battery 20 in the vacuum oven 300, the vacuum degree and temperature in the vacuum oven 300 can remain unchanged, that is, the vacuum oven 300 can bake the battery 20 at a constant vacuum degree and a constant temperature, and the vacuum degree and temperature will not affect the capacitance between the parallel plates of the micro-water sensor 400 (the capacitance between the first parallel plate 412 and the second parallel plate 414), and the capacitance between the parallel plates of the micro-water sensor 400 is mainly affected by the real-time water content in the vacuum oven 300, so the real-time water content in the vacuum oven 300 can be obtained by obtaining the capacitance between the parallel plates of the micro-water sensor 400. That is, in the present embodiment, the principle used by the micro-water sensor 400 to obtain the real-time water content is the relationship between the capacitance and the real-time water content. It can be understood that in other embodiments, the micro-water sensor 400 can also use other principles to obtain the real-time water content.

[0039] It should be noted that the capacitance acquisition unit 420 acquires the capacitance between the first parallel plate 412 and the second parallel plate 414, and the calculation unit 430 calculates the water content according to the capacitance acquired by the capacitance acquisition unit 420, which are both existing technologies and will not be described in detail here.

[0040] In this embodiment, if Figure 1 and Figure 2 As shown, the controller 500 is located outside the vacuum oven 300. In this way, not only can the controller 500 be effectively prevented from interfering with the placement of the battery 20 in the vacuum oven 300, but it is also convenient to manually operate the controller 500 and read data through the controller 500. It can be understood that in other embodiments, when the controller 500 is a high temperature resistant controller, the controller 500 can also be located in the vacuum oven 300.

[0041] Specifically, in the present embodiment, in the height direction of the vacuum oven 300, the micro-water sensor 400 is arranged on the inner wall of the top wall of the vacuum oven 300, and the controller 500 is arranged on the outer wall of the top wall of the vacuum oven 300. Among them, the micro-water sensor 400 is arranged on the inner wall of the top wall of the vacuum oven 300, which is not only convenient for the micro-water sensor 400 to obtain the real-time water content in the vacuum oven 300, but also can effectively avoid the micro-water sensor 400 from interfering with the placement position of the battery 20 in the vacuum oven 300. The controller 500 is arranged on the outer wall of the top wall of the vacuum oven 300, which can prevent the controller 500 from being misoperated manually. It can be understood that in other embodiments, the micro-water sensor 400 can also be arranged on the inner wall of the side wall of the vacuum oven 300, and the controller 500 can also be arranged on the outer wall of the side wall of the vacuum oven 300.

[0042] In the present embodiment, a heating jig 600 is provided in the vacuum oven 300. The heating jig 600 is connected to the controller 500. The heating jig 600 is used to carry and bake the battery 20. If the real-time water content is lower than the preset value and the real-time water content is maintained at less than or equal to the preset value for a preset time, the controller 500 controls the heating jig 600 to stop working. Carrying and baking the battery 20 by the heating jig 600 makes it easier to fix the battery 20 in the vacuum oven 300, and is also more conducive to heating the battery 20. It can be understood that in other embodiments, when the vacuum oven 300 is equipped with a heater connected to the controller 500, the battery 20 can be baked by the heater. At this time, if the real-time water content is lower than the preset value and the real-time water content is maintained at less than or equal to the preset value for a preset time, the controller 500 controls the heater to stop working. At this time, the heating jig 600 can also be omitted. When the vacuum oven 300 is equipped with a heater connected to the controller 500, the battery 20 can also be baked together with the heating jig 600 and the heater. At this time, if the real-time water content is lower than the preset value and the real-time water content is maintained at a level less than or equal to the preset value for a preset time, the controller 500 controls the heating jig 600 and the heater to stop working.

[0043] In the present embodiment, the heating jig 600 has a plurality of receiving grooves 610 and a plurality of heating elements. The plurality of heating elements are arranged one-to-one with the plurality of receiving grooves 610. And the plurality of heating elements are respectively connected to the controller 500. Each receiving groove 610 is used to accommodate a battery 20. In this way, it is easier to fix the battery 20 on the heating jig 600, and it is more conducive to uniform heating of the plurality of batteries 20. It can be understood that in other embodiments, the heating element can also be one, and one heating element can heat the plurality of receiving grooves 610 of the heating jig 600.

[0044] In this embodiment, a plurality of accommodating grooves 610 are arranged in an array in a horizontal plane determined by the length direction and the width direction of the vacuum oven 300. In this way, more batteries 20 can be placed in the limited space of the vacuum oven 300, which is conducive to improving the overall production efficiency of the batteries 20. It is understood that in other embodiments, the plurality of accommodating grooves 610 can also be arranged in a row or a column along the length direction or the width direction of the vacuum oven 300. Of course, the plurality of accommodating grooves 610 can also be arranged in a disorderly manner.

[0045] In this embodiment, there are multiple heating jigs 600. Multiple heating jigs 600 are arranged in the height direction of the vacuum oven 300. In this way, the space in the height direction of the vacuum oven 300 can be fully utilized to improve the overall production efficiency of the battery 20. It can be understood that in other embodiments, there can also be one heating jig 600. Specifically, in this embodiment, there are three heating jigs 600.

[0046] In this embodiment, a fixing frame 700 is provided in the vacuum oven 300. The fixing frame 700 includes a base 710 and a fixing seat 720. The fixing seat 720 is suspended on the vacuum oven 300 through the base 710. The heating fixture 600 is provided on a side of the fixing seat 720 away from the base 710. In this way, the heating fixture 600 can be suspended in the vacuum oven 300, so as to facilitate the full diffusion of the moisture baked out of the battery 20.

[0047] In this embodiment, the vacuum oven 300 includes a box body 310 and a door 320 for sealing or opening the box body 310. In this way, the vacuum degree and temperature of the vacuum oven 300 can be effectively maintained, and the battery 20 can be easily taken in and out of the vacuum oven 300.

[0048] In this embodiment, a heater is provided on the inner wall of the box body 310. The heater is connected to the controller 500. In this way, the heating fixture 600 and / or the heater can be selected to bake the battery 20, so that the above-mentioned battery baking oven device 10 has multiple usage methods to meet different usage requirements.

[0049] In this embodiment, moving wheels are provided at the bottom of the box 310. The moving wheels include fixed casters and universal casters provided at the bottom of the box 310. In this way, the above-mentioned battery baking oven device 10 is convenient to move and more convenient to use.

[0050] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A battery baking oven device, characterized in that: include: Vacuum oven, used for vacuum baking batteries; as well as A micro-water sensor is disposed in the vacuum oven and is used to detect the real-time water content in the vacuum oven; as well as A controller is connected to the vacuum oven and the micro-water sensor respectively, and is used to obtain the real-time water content in the vacuum oven. If the real-time water content is lower than a preset value and the real-time water content is maintained at a value less than or equal to the preset value for a preset time, the controller controls the vacuum oven to stop working.

2. The battery baking oven device according to claim 1, characterized in that: The controller is used to control the micro-water sensor to detect the real-time water content in the vacuum oven at predetermined intervals.

3. The battery baking oven device according to claim 1, characterized in that: The micro-water sensor includes a capacitance unit, a capacitance acquisition unit and a calculation unit. The capacitance unit includes a first parallel plate and a second parallel plate arranged opposite to each other. The capacitance acquisition unit is connected to the capacitance unit and is used to acquire the capacitance between the first parallel plate and the second parallel plate. The calculation unit is connected to the capacitance acquisition unit and is used to calculate the water content according to the capacitance acquired by the capacitance acquisition unit. The calculation unit is connected to the controller.

4. The battery baking oven device according to claim 1, characterized in that: The controller is located outside the vacuum oven.

5. The battery baking oven device according to claim 1, characterized in that: A heating jig is arranged in the vacuum oven, the heating jig is connected to the controller, and the heating jig is used to carry and bake the battery.

6. The battery baking oven device according to claim 5, characterized in that: In the height direction of the vacuum oven, the micro-water sensor is arranged on the inner wall of the top wall of the vacuum oven, and the controller is arranged on the outer wall of the top wall of the vacuum oven.

7. The battery baking oven device according to claim 5, characterized in that: The heating fixture has a plurality of accommodating grooves and a plurality of heating elements. The plurality of heating elements are arranged one-to-one with the plurality of accommodating grooves, and the plurality of heating elements are respectively connected to the controller. Each of the accommodating grooves is used to accommodate a battery.

8. The battery baking oven device according to claim 7, characterized in that: In a horizontal plane defined by the length direction and the width direction of the vacuum oven, the plurality of containing grooves are arranged in an array; and / or There are multiple heating jigs, and the multiple heating jigs are arranged in the height direction of the vacuum oven.

9. The battery baking oven device according to claim 5, characterized in that: A fixing frame is arranged in the vacuum oven, and the fixing frame comprises a base and a fixing seat. The fixing seat is suspended on the vacuum oven through the base, and the heating jig is arranged on a side of the fixing seat away from the base.

10. The battery baking oven device according to any one of claims 1 to 9, characterized in that: The vacuum oven comprises a box body and a door for sealing or opening the box body; The inner wall of the box is provided with a heater, and the heater is connected to the controller; and / or The bottom of the box is provided with moving wheels, and the moving wheels include fixed casters and universal casters arranged at the bottom of the box.

Images