CN220040137U

CN220040137U - Battery water content on-line measuring device

Info

Publication number: CN220040137U
Application number: CN202320918703.7U
Authority: CN
Inventors: 张文辉; 彭先政; 熊亮; 李建军
Original assignee: Lanjun New Energy Technology Co ltd
Current assignee: Lanjun New Energy Technology Co ltd
Priority date: 2023-04-17
Filing date: 2023-04-17
Publication date: 2023-11-17
Anticipated expiration: 2033-04-17

Abstract

The disclosure provides a battery water content on-line measuring device relates to battery manufacturing technical field. The device for detecting the water content of the battery on line comprises an oven, a sensor and a controller, wherein the oven is used for baking the battery; the sensor is arranged in the oven and is used for detecting the initial weight of the battery and the real-time weight of the battery in the baking process and transmitting the weight information to the controller. The controller is respectively connected with the sensor and the oven, and is used for acquiring the initial weight and the real-time weight and calculating the difference value of the initial weight and the real-time weight; if the difference value is greater than or equal to the preset value, the controller is also used for controlling the oven to stop working; if the difference is smaller than the preset value, the controller is also used for controlling the oven to continue working. The device simple structure easily realizes, can improve battery water content detection efficiency, and then improves the production efficiency of battery.

Description

Battery water content on-line measuring device

Technical Field

The utility model relates to the technical field of battery manufacturing, in particular to an on-line detection device for water content of a battery.

Background

In the manufacturing process of lithium ion batteries, the water content of the batteries can be tested, and the current testing method mostly adopts the following modes: before baking, placing a prepared false battery and a certain number of normal batteries in a clamp, carrying the clamp into a furnace chamber for vacuum baking after the clamp is full, baking according to a set process time, taking out the false battery after baking is finished, and manually taking out the false battery to detect the water content. If the water content results in a satisfactory level, the clamp is removed from the furnace chamber and passed to the next process. If the result of the water content does not meet the requirement, the false battery is required to be put into the clamp again, then put into the furnace for re-baking, and the steps are repeated for detection until the result of the water content meets the requirement, and then the false battery can flow into the next working procedure.

In the mode, the artificial battery is needed to be manufactured manually in advance, and the cost is high; and the method belongs to offline testing, and has complex operation flow and low efficiency. In addition, manual sampling is required to meet the temperature and humidity requirements and is strictly executed according to operation specifications, and the whole testing process easily causes large errors of testing results, so that products are scrapped or the quality of the products is affected.

Disclosure of Invention

The utility model aims at providing an online detection device for the water content of a battery, which can realize online test of the water content of the battery in the baking process, has high test efficiency, is easy to implement and is beneficial to improving the production efficiency of the battery.

Embodiments of the utility model may be implemented as follows:

the utility model provides an on-line detection device for water content of a battery, which comprises:

the oven is used for baking the battery;

the sensor is arranged in the oven and is used for detecting the initial weight of the battery and the real-time weight in the baking process;

the controller is respectively connected with the sensor and the oven and is used for calculating the difference value between the initial weight and the real-time weight; if the difference value is greater than or equal to a preset value, the controller is also used for controlling the oven to stop working; and if the difference value is smaller than the preset value, the controller is also used for controlling the oven to continue working.

In an alternative embodiment, a heating jig is arranged in the oven, the heating jig is connected with the controller, and the heating jig is used for accommodating the battery and heating and baking the battery.

In an alternative embodiment, the heating jig is provided with a plurality of accommodating grooves, and each accommodating groove is used for accommodating one battery; the cell wall of the accommodation cell is internally provided with a heating element which is connected with the controller.

In an alternative embodiment, a fixed seat is arranged in the oven, the fixed seat is arranged on the sensor, and the heating jig is arranged on the fixed seat; the sensor is used for measuring the total weight of the fixing seat, the heating jig and the battery.

In an alternative embodiment, the sensor is located in the middle of the holder.

In an alternative embodiment, the oven comprises a box body and a box door connected with the box body in a sealing way, wherein the box door is used for opening or closing the box body;

the sensor, the fixing seat and the heating jig are arranged in the box body, and the controller is arranged outside the box body.

In an alternative embodiment, a sealing strip is arranged in at least one of the box door and the box body so as to realize sealing connection of the box door and the box body.

In an alternative embodiment, a moving wheel is arranged at the bottom of the oven.

In an alternative embodiment, the mobile wheel comprises a directional caster and a universal caster respectively connected to the bottom of the oven.

In alternative embodiments, the sensor is a weight sensor or a pressure sensor.

The beneficial effects of the embodiment of the utility model include, for example:

the on-line detection device for the water content of the battery, provided by the embodiment of the utility model, has the advantages of simple structure, strong operability, high detection efficiency and accurate result, and is beneficial to improving the production efficiency of the battery by testing the weights before baking and after baking and judging the water content of the battery according to the weight difference value of the two weights.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an online detection device for water content of a battery according to an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of an apparatus for detecting water content of a battery according to an embodiment of the present utility model;

fig. 3 is a schematic diagram of a split structure of an online detection device for water content of a battery according to an embodiment of the present utility model.

Icon: 100-an online detection device for the water content of a battery; 101-a battery; 110-baking oven; 111-a box body; 113-a door; 115-door lock; 117-hinge; 120-sensors; 130-fixing seat; 140-heating the jig; 150-a controller; 160-moving the wheel; 161-directional casters; 163-universal casters; 165-base.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, if the terms "upper", "lower", "inner", "outer", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present utility model and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus it should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.

It should be noted that the features of the embodiments of the present utility model may be combined with each other without conflict.

In the manufacturing process of lithium ion batteries, the water content of the batteries can be tested, and the current testing method mostly adopts the following modes: before baking, placing a prepared false battery and a certain number of normal batteries in a clamp, carrying the clamp into a furnace chamber for vacuum baking after the clamp is filled, baking according to a set process time, taking the clamp out of the furnace chamber after baking is finished, placing the clamp on a blanking platform, taking the false battery out by a mechanical arm, manually taking out to detect the water content, and then placing the clamp back into the furnace chamber to wait for the detection result of the water content. If the water content meets the requirement, the clamp is carried from the furnace chamber to the blanking platform, the battery is put into the cooling furnace by the manipulator, and the battery flows to the next working procedure after being cooled. If the result of the water content does not meet the requirement, the clamp is required to be carried out again, the false battery is put into the clamp together, then the false battery is put into the furnace for re-baking, and the tedious detection steps are repeated until the result of the water content meets the requirement, and then the false battery can flow into the next working procedure.

In the mode, the false battery is required to be manufactured manually in advance, and the method belongs to off-line test, and is complex in operation flow and low in efficiency; and manual sampling is required to meet the temperature and humidity requirements and is strictly executed according to operation specifications, and the whole test process easily causes large errors of test results, so that products are scrapped or the quality of the products is affected.

Referring to fig. 1 to 3, an on-line detection device 100 for water content of a battery according to an embodiment of the present utility model includes an oven 110, a sensor 120 and a controller 150, wherein the oven 110 is used for baking the battery 101; a sensor 120 is provided within the oven 110 for detecting the initial weight of the battery 101 and the real-time weight of the battery 101 during baking and for communicating weight information to the controller 150. Controller 150 is connected to sensor 120 and oven 110, respectively, controller 150 being configured to calculate a difference between the initial weight and the real-time weight; if the difference is greater than or equal to the preset value, the controller 150 is further configured to control the oven 110 to stop working; if the difference is smaller than the preset value, the controller 150 is further configured to control the oven 110 to continue to operate.

It will be appreciated that the baking is performed under the same vacuum and temperature conditions, the rate of evaporation of moisture from each cell 101 is uniform, so that the amount of moisture evaporated from each cell 101 is the same for each time period, which is equivalent to the reduced weight of each cell 101, and the initial water content of the cells 101 before baking is the same for the cells 101 produced in the same lot, so that the water content of each cell 101 during baking is also the same. Based on the above characteristics, the embodiment adopts a weighing mode to realize the on-line detection of the water content of the battery 101, so that the operation is simpler and more convenient, and the testing efficiency is higher. When the water content of the battery 101 meets the requirement, the operation of the oven 110 can be stopped in time, and the ineffective baking time of the oven 110 is reduced.

Optionally, a sensor 120, a fixing seat 130 and a heating fixture 140 are disposed in the oven 110, the sensor 120 is disposed in the oven 110, the fixing seat 130 is disposed on the sensor 120, the heating fixture 140 is disposed on the fixing seat 130, and the battery 101 is disposed in the heating fixture 140. When detecting the initial weight of the battery 101 before baking, the sensor 120 may be used to measure the initial total weight of the holder 130, the heating jig 140, and the battery 101. This arrangement eliminates the need to take the battery 101 out of the oven 110 alone for testing. Since the sensor 120 is disposed in the oven 110, the total weight of the fixing base 130, the heating jig 140 and the battery 101 can be directly detected, and the weight of the fixing base 130 and the heating jig 140 is hardly changed during the baking process, so that the water content of the battery 101 is not affected.

Similarly, the sensor 120 is used to measure the real-time total weight of the holder 130, the heating fixture 140 and the battery 101 when detecting the real-time weight of the battery 101 during baking. The difference between the initial total weight before baking and the real-time total weight during baking is understood to be the difference between the initial weight of all the cells 101 and the real-time weight during baking, which is the moisture evaporated during baking of all the cells 101. When the moisture evaporated from the battery 101 reaches a preset value, it is indicated that the moisture content of the battery 101 satisfies the requirement.

In the present embodiment, the sensor 120 may be a weight sensor, a pressure sensor, or other measuring instrument, as long as the total weight of the battery 101 can be directly or indirectly measured, and is not particularly limited herein.

Alternatively, when detecting the real-time weight of the battery 101 during the baking process, the real-time weight of the battery 101 during the baking process may be detected every preset time. The real-time weight herein may be understood as the real-time total weight of the holder 130, the heating jig 140, and the battery 101. Detecting every preset time can enable the oven 110 to be stopped in time after the water content of the battery 101 meets the requirement, and avoid the oven 110 from continuing to heat to do invalid work. And the battery 101 can be discharged from the furnace and discharged to enter the next working procedure, so that the production efficiency can be greatly improved. In addition, the baking time is detected once every preset time in time, so that the influence on the production efficiency caused by overlong or excessively short baking time can be avoided. The preset time intervals may be 30 seconds, 50 seconds, 60 seconds, 90 seconds, two minutes, or three minutes, and the like, and may be flexibly set according to actual conditions, and are not particularly limited herein.

Optionally, the heating fixture 140 is connected to the controller 150, and the heating fixture 140 is used for accommodating the battery 101 and heating and baking the battery 101. The heating jig 140 is provided with a plurality of accommodating grooves, each accommodating groove is provided with a battery 101, the shape and the size of each accommodating groove are matched with those of the battery 101, and the stability of the battery 101 in the moving and baking processes is maintained. The wall of the accommodating groove is provided with a heating element which can be a resistance wire and the like. The heating element is used for baking and heating the batteries 101 so as to uniformly heat each battery 101, so that the uniformity of the temperature of all the batteries 101 is better, and the moisture evaporation rate of all the batteries 101 in the baking process is ensured to be consistent. The heating element is coupled to the controller 150, including but not limited to a wired connection or a wireless connection. When the water content of the battery 101 satisfies the requirement, the controller 150 controls the heating member to stop heating.

It should be appreciated that the inner wall of the oven 110 may also be provided with a heater, such as an infrared lamp tube, to further heat the battery 101, thereby improving the baking efficiency, shortening the baking time, and further improving the production efficiency. Accordingly, the heater is connected to the controller 150, including but not limited to a wired connection or a wireless connection. When the water content of the battery 101 satisfies the requirement, the controller 150 controls the heater to stop heating.

Optionally, a temperature sensing probe is disposed in the heating fixture 140, and the temperature sensing probe is connected to the controller 150. The temperature sensing probe is used for detecting the real-time baking temperature of the battery 101 and transmitting the temperature information to the controller 150, and the controller 150 adjusts the power of the heating element according to the temperature information so as to adjust the baking temperature of the battery 101.

Optionally, a fixing seat 130 is arranged in the oven 110, the fixing seat 130 is arranged on the sensor 120, and the heating jig 140 is arranged on the fixing seat 130; the sensor 120 is used for measuring the total weight of the fixing base 130, the heating jig 140 and the battery 101. The sensor 120 may be a load cell 120 or a pressure sensor 120. In this embodiment, the sensor 120 is disposed on the bottom wall of the oven 110, the fixing seat 130 and the heating fixture 140 are sequentially disposed above the sensor 120, and the battery 101 is disposed in the heating fixture 140. The sensor 120 is located in the middle of the fixing seat 130, so that the sensor 120 is stressed more uniformly, and the measurement result is more accurate.

Optionally, oven 110 includes a housing 111 and a door 113 hermetically connected to housing 111, door 113 for opening or closing housing 111. The sensor 120, the fixing base 130 and the heating jig 140 are arranged in the box 111, and the controller 150 is arranged outside the box 111. The controller 150 is connected to the sensor 120 by a cable, and the controller 150 is connected to the heating element by a cable, however, in other embodiments, the cable may be connected by a wireless communication connection, which is not limited herein. Door 113 is rotatably mounted on case 111 by means such as hinge 117, and sealing strips are provided in at least one of door 113 and case 111, and sealing strips realize sealing connection between door 113 and case 111 in a state where door 113 is closed, thereby improving air tightness. The heat preservation effect of oven 110 is better like this setting, prevents to toast the in-process heat and gives off, improves and toasts efficiency. In addition, the baking process of the battery 101 is performed in a vacuum environment, the good sealing performance of the oven 110 is beneficial to the maintenance of the vacuum environment, the baking condition of the battery 101 is met, the baking quality is improved, and then the product quality of the battery 101 is improved.

It will be appreciated that by providing the sealing strip, a cushioning effect is also provided to prevent rigid collision with the case 111 during closing of the door 113.

Optionally, door 113 and box 111 are further provided with a door lock 115 that is fastened to each other, so as to ensure that door 113 is in a closed state during baking, and door lock 115 can press the sealing strip in a locked state, thereby further improving the tightness of oven 110.

In this embodiment, the controller 150 is disposed at the top of the case 111, and the controller 150 may integrate an instruction input unit, a display, etc., so as to facilitate manual checking of the baking state of the battery 101. The instruction input part may implement the baking start-stop, temperature adjustment, baking time setting, weight detection frequency setting, and preset value range setting for comparison of the difference values, etc. of the oven 110, and the display may display the initial weight, real-time weight, model parameters of the battery 101, moisture content, baking temperature, etc. of the battery 101.

The controller 150 may employ a general-purpose processor including, but not limited to, a central processing unit (Central Processing Unit, CPU), a network processor (Network Processor, NP), etc., a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, etc. Of course, the controller 150 may be integrated into a PLC controller 150, a single chip microcomputer, or the like, which is not particularly limited herein.

Optionally, a moving wheel 160 is provided at the bottom of the oven 110. The moving wheel 160 comprises a directional caster 161 and a universal caster 163 which are respectively connected to the bottom of the oven 110, so that the oven 110 can be moved conveniently, and the use is more convenient. In this embodiment, a base 165 is mounted on the bottom of the oven 110, and a directional caster 161 and a universal caster 163 are mounted on the base 165, respectively.

The embodiment of the utility model provides a battery water content online detection device 100, which is specifically used as follows:

the battery 101 is placed in the heating jig 140, the heating jig 140 is placed in the oven 110, and the door 113 is closed.

The sensor 120 measures an initial total weight, wherein the initial total weight is an initial total weight of the holder 130, the heating jig 140, and the battery 101 before baking.

The oven 110 and the heating jig 140 bake the battery 101 at a baking temperature of about 80 to 150 c, maintaining a vacuum environment in the oven 110. During baking, the total weight was measured in real time every one minute. The real-time total weight is the total weight of the fixing base 130, the heating jig 140 and the battery 101 during the baking process.

The controller 150 judges whether the water content of the battery 101 meets the requirement according to the difference between the initial total weight and the real-time total weight, and if the difference is greater than or equal to a preset value, the oven 110 is controlled to stop working; if the difference is smaller than the preset value, the oven 110 is controlled to continue to operate until the difference is larger than or equal to the preset value. The preset value can be flexibly adjusted according to actual conditions.

The battery water content on-line detecting device 100 of the embodiment is used for detecting, the battery 101 is not required to be taken out from the oven 110 to carry out water content testing, complicated steps of off-line detection are reduced, manual sampling testing and uploading of water content are not required, a special moisture tester is reduced, the action of returning a clamp to the oven and re-baking are reduced, the scrapping of products or the influence on the quality of the products due to the fact that water content results are uploaded incorrectly due to manual operation are avoided, meanwhile, labor, materials, equipment and maintenance cost are reduced, manufacturing cost is saved, and production efficiency is greatly improved. In addition, the detection method does not need to place a false battery, can increase a normal battery core to perform normal baking, improves the production efficiency, and reduces the labor and the manufacturing cost for manufacturing the false battery; the baking is not needed according to the fixed setting time, and the baking discharging and discharging are stopped immediately according to the values fed back by the sensor 120 and the controller 150, so that the influence of overlong or too short baking time on the production efficiency is avoided, and the production efficiency is greatly improved.

In summary, the online detection device 100 for water content of a battery according to the embodiment of the utility model has the following beneficial effects:

the on-line detection device 100 for the water content of the battery provided by the embodiment of the utility model has the advantages of simple structure and strong operability, the water content of the battery 101 is judged according to the weight difference between the two by testing the weight before baking and the weight after baking, the operation is simple, the result is accurate, and the improvement of the production efficiency of the battery 101 is facilitated. The battery 101 does not need to be taken out of the oven 110 for offline testing, so that the labor, material, equipment and maintenance costs are reduced, the manufacturing cost is saved, the production efficiency is prevented from being influenced by overlong or too short baking time, and the production efficiency is greatly improved.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present utility model should be included in the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. An on-line detection device for water content of a battery, comprising:

the oven is used for baking the battery;

the sensor is arranged in the oven and is used for detecting the initial weight of the battery and the real-time weight of the battery in the baking process;

the controller is respectively connected with the sensor and the oven, and is used for acquiring the initial weight and the real-time weight and calculating the difference value of the initial weight and the real-time weight; if the difference value is greater than or equal to a preset value, the controller is also used for controlling the oven to stop working; and if the difference value is smaller than the preset value, the controller is also used for controlling the oven to continue working.

2. The on-line detection device for water content of a battery according to claim 1, wherein a heating jig is arranged in the oven and is connected with the controller, and the heating jig is used for accommodating the battery and heating and baking the battery.

3. The device for on-line detection of water content of a battery according to claim 2, wherein the heating jig is provided with a plurality of accommodating grooves, each accommodating groove being used for accommodating one battery; the cell wall of the accommodation cell is internally provided with a heating element which is connected with the controller.

4. The device for on-line detection of water content of a battery according to claim 2, wherein a fixing seat is arranged in the oven, the fixing seat is arranged on the sensor, and the heating jig is arranged on the fixing seat; the sensor is used for measuring the total weight of the fixing seat, the heating jig and the battery.

5. The device for on-line detection of water content of a battery according to claim 4, wherein the sensor is located in the middle of the holder.

6. The on-line battery water content detection apparatus according to claim 4, wherein the oven comprises a case and a door hermetically connected to the case, the door being for opening or closing the case;

7. The on-line battery water content detection apparatus according to claim 6, wherein a sealing strip is provided in at least one of the door and the case to achieve a sealed connection of the door and the case.

8. The on-line battery water content detection device according to claim 1, wherein a moving wheel is arranged at the bottom of the oven.

9. The on-line battery water content detection apparatus according to claim 8, wherein the moving wheel comprises a directional caster and a universal caster respectively connected to the bottom of the oven.

10. The on-line detection device for water content of a battery according to any one of claims 1 to 9, wherein the sensor is a weight sensor or a pressure sensor.