CN1258235C - Liquid injection and degassing method for electric energy storage device - Google Patents

Abstract

The invention relates to a liquid injection and degassing method of a device for storing electric energy, which comprises the following steps; the pipeline is arranged in the internal pool center of the electric energy storage device and communicated with the outside; pumping out the gas in the cell core of the electric energy storage device through the pipeline to form a vacuum negative pressure state; electrolyte is uniformly injected into the inner cell core of the electric energy storage device through the pipeline; keeping the internal cell center of the electric energy storage device in a vacuum negative pressure state and charging and activating; gas generated after the internal cell center of the electric energy storage device is charged and activated is removed through the pipeline; and heat-sealing the interlayer of the electric energy storage device for wrapping the pipeline, and performing hot melt extrusion on the pipeline during heat sealing, so that a degassing bag can be omitted, the volume of the electric energy storage device can be reduced, and the manufacturing cost of the electric energy storage device can be reduced.

Description

Liquid injection and degassing method for electric energy storage device

technical field

The invention relates to a liquid injection and degassing method for an electric energy storage device, especially for uniform injection and removal of the electrolyte used in an electric energy storage and removal device that can be repeatedly charged and discharged. gas produced afterwards.

Background technique

With the rapid development of science and technology, various electronic products such as mobile phones, portable personal digital assistants PDA and portable computers have become indispensable tools in our life; under the current development trend of electronic products emphasizing light, thin, short and small, Not only is the demand for energy storage devices increasing, but the quality requirements are also constantly improving. They must be designed according to the characteristics of the electronic products they are equipped with. Therefore, it is necessary to consider how to miniaturize the energy storage devices, use green process technology to reduce environmental pollution, and Increasing the service life has always been an urgent problem to be solved.

Today's general energy storage devices, such as lithium-polymer secondary batteries, when the electrolyte is injected, the electrolyte will be unevenly distributed, which will reduce the performance of the energy storage device, and the electrolyte will remain after the injection. The electrolyte is in the interlayer of the electrical energy storage device, so during the edge banding process, the electrolyte will often remain in the interlayer of the electrical energy storage device, resulting in electrolyte contamination of the edge banding, which will result in incomplete edge banding and air leakage, so It will increase the defective rate of production and storage of electric energy devices, such as the manufacturing method of the battery of the national invention patent application No. 00106991.8, which is a bag-shaped outer film (battery interlayer) used to accommodate the battery element (pool core) The opening side of the opening is made larger than the generally determined shape and size to serve as the primary storage area for injecting the electrolyte. After the liquid penetrates into the side of the battery element, it is sealed between the primary storage area and the storage part for storing the battery element, and finally the primary storage area of the exterior membrane is cut off. In this case, the electrolyte is injected into the primary storage area formed by the outer membrane body, so the electrolyte will remain in the primary storage area, that is, the outer membrane body, and the residual area is large, so when sealing, it is There will be a problem of a large amount of electrolyte contaminating the edge banding, which will lead to incomplete edge banding of the battery and air leakage, resulting in an increase in the production defect rate.

In addition, when the electric energy storage device is charged and activated for the first time, the electrolyte is likely to generate gas in the inner core of the electric energy storage and removal device, which will reduce the performance of the electric energy storage device; Schematic diagram of the internal structure, a power storage device 10, which includes a pool core 12, the pool core 12 is adjacent to a degassing bag 16, and the degassing bag 16 and the pool core 12 retain a degassing bag when heat sealing The gas channel 14 communicates the degassing bag 16 with the cell core 12, so that part of the gas generated by the electrolyte in the internal cell core 12 when the electric energy storage device 10 is charged and activated for the first time is discharged into the degassing bag 16 Collecting, the electrolyte in the cell core 12 will also flow to the degassing bag 16 or remain in the interlayer of the cell core 12 and the degassing bag 16 during the exhaust process, causing electrolyte pollution and reducing the stored electrical energy device 10 life, and the air storage bag 16 occupies a certain volume and cost, which increases the volume and manufacturing cost of the electric energy storage device 10 .

Therefore, the present invention proposes a liquid injection and degassing method for the electric energy storage device in view of the above problems, which can not only improve the liquid injection process due to environmental restrictions, uneven electrolyte distribution, and electrolyte pollution during edge sealing of the electric energy storage device. And the shortcoming that the volume of the electric energy storage device is too large, and can increase the service life and reduce the manufacturing cost, has been eagerly expected by users and the inventor of the present invention for a long time. Based on the research, development, and sales experience of related products for many years, the inventor of the present invention has thought and improved ideas, and after many researches, designs, and special discussions, he has finally developed a method for injecting liquid and degassing the electric energy storage device. Improvement, so that the above-mentioned problems can be solved.

Contents of the invention

The main purpose of the present invention is to provide a liquid injection and degassing method for the electric energy storage device, so that the electrolyte injected into the electric energy storage device in the liquid injection process is evenly distributed, free from environmental restrictions, and reduces the generation of electrolyte during edge sealing. Contamination causes air leakage to increase service life.

A secondary object of the present invention is to provide a method for injecting liquid and degassing the electrical energy storage device, so as to reduce the volume of the electrical energy storage device and reduce the manufacturing cost of the electrical energy storage device.

To achieve the above purpose, the present invention provides a liquid injection and degassing method for an electric energy storage device. Connected; through the pipeline, the internal cell core gas of the electric energy storage device is drawn out to form a vacuum negative pressure state and maintain the vacuum state; the electrolyte is injected into the internal cell core of the electric energy storage device through the pipeline; the storage The inner core of the electric energy device is charged and activated in a vacuum negative pressure state; the part of the gas generated after charging and activating the inner core of the electric energy storage device is removed by pumping through the pipeline; and the stored electric energy of the coated pipeline is heat-sealed The interlayer of the device, and the pipeline is melted and extruded together with the residual electrolyte of the pipeline during heat sealing.

A method for injecting liquid into a device for storing electrical energy, comprising the following steps:

Installing a pipeline to communicate with the outside world in the inner pool core of an electrical energy storage device; injecting electrolyte solution into the inner pool core of the electrical energy storage device through the pipeline; and

The interlayer of the electric energy storage device covering the pipeline is heat-sealed, and the pipeline is hot-melt extruded during heat-sealing.

A liquid injection and degassing method for a storage electric energy device, which includes the following steps:

Install a pipeline in the inner core of an electric energy storage device to communicate with the outside world; inject the electrolyte into the inner core of the electrical energy storage device through the pipeline; charge and activate the electrical energy storage device; pump out the gas through the pipeline the gas generated after charging and activation of the internal cell of the stored electrical energy device; and

The interlayer of the electric energy storage device covering the pipeline is heat-sealed, and the pipeline is hot-melt extruded during heat-sealing.

In order to further understand and understand the structural features and the achieved effects of the present invention, I would like to provide preferred embodiment diagrams and detailed descriptions as follows.

Description of drawings

Fig. 1 is a schematic diagram of the internal structure of an existing electric energy storage device;

Fig. 2 is a schematic view of the vacuum pumping structure of a preferred embodiment of the present invention;

Fig. 3 is a schematic diagram of the liquid injection structure of a preferred embodiment of the present invention;

Fig. 4 is a schematic diagram of a degassing structure of a preferred embodiment of the present invention.

Specific embodiments

Please refer to Fig. 2, which is a schematic view of the vacuum pumping structure of a preferred embodiment of the present invention, which includes a storage electric energy device 20, the inside of which storage electric energy device 20 includes a pool core 22, and one end of a liquid injection and degassing pipe 24 is Installed in the pool core 22 of the non-conductive handle end side of the electric energy storage device 20, the other end of the liquid injection and degassing pipe 24 is connected with a hose 26, and the other end of the hose 26 is connected with a suction pipe 30 Socketed, the exhaust pipe 30 is socketed with a vacuum pump 32, and the hose 26 can use a spring clip 28 as an isolation device.

The step of evacuating the electric energy storage device 20 before liquid injection: first remove the spring clip 28 on the hose 26, and the pool core 22 at the end side of the non-conductive handle of the electric energy storage device 20 utilizes the injection The liquid degassing pipe 24, the flexible pipe 26 and the suction pipe 30 form a suction pipeline, use the vacuum pump 32 to vacuumize the pool core 22, and clamp the spring clip 28 back on the flexible pipe 26 after vacuuming , to isolate the pool core 22 from communicating with the outside world to maintain a vacuum negative pressure state, and remove the exhaust pipe 30 and the vacuum pump 32 .

Please also refer to FIG. 3 , which is a schematic diagram of the liquid injection structure of a preferred embodiment of the present invention. The liquid injection step after the electrical energy storage device 20 completes vacuuming is: a liquid injection tube 34 is sleeved with the hose 26 , the liquid injection pipe 34 is socketed with a liquid injection machine 36, and the spring clip 28 is removed. Inject the electrolyte solution without visible air bubbles and mixed with appropriate additives into the pool core 22, remove the injection tube 34 and the injection machine 36 after the injection of the electrolyte solution, and heat seal the hose 26 To isolate the outside world and keep the pool core 22 in a vacuum state, it can be charged and activated.

Please also refer to FIG. 4 , which is a schematic diagram of the degassing structure of a preferred embodiment of the present invention. The degassing step after the electrical energy storage device 20 is charged and activated: after the electrical energy storage device 20 is charged and activated, the The spring clip 28 is clamped between the socket 38 of the hose 26 and the liquid injection and degassing pipe 24 and the heat seal 37 of the hose 26, and the cut between the spring clip 28 and the heat seal 37 39 cut off the heat seal 37, so that the pool core 22 can still be kept isolated from the outside world, (please refer to Fig. 2) is to connect the suction pipe 30 connected to the vacuum pump 32 back on the flexible pipe 26, remove the The spring clip 28 is used to extract part of the gas produced by the electrolyte after the battery core 22 is charged and activated, and then heat seal the interlayer of the storage electric energy device 20 covering the liquid injection and degassing pipe 24, and make the liquid injection and degassing pipe 24 and the residual The electrolyte in the tube is melted and extruded out of the interlayer to complete the degassing step.

In summary, the steps of the liquid injection and degassing method of the electric energy storage device of the present invention are to install the liquid injection and degassing pipe 24 on the inner pool center 22 of the non-conductive handle end side of the electric energy storage device 20, and the liquid injection The degassing pipe 24 forms a suction line with the flexible pipe 26 and the suction pipe 30 and forms a vacuum state by the vacuum pump 32 to the pool core 22, and utilizes the spring clip 28 to be clamped on the flexible pipe 26 to be connected with the flexible pipe 26. The outside world is kept isolated, and the suction pipe 30 and the vacuum pump 32 are removed, the liquid injection pipe 34 connected with the liquid injection machine 36 is sleeved on the hose 26 and the spring clip 28 is removed. The electrolyte solution is injected into the pool core 22, and then the hose 26 is heat-sealed to isolate the outside world and maintain a vacuum negative pressure to charge and activate.

The degassing step after charging and activating the electric energy storage device 20 is to clamp the hose 26 and the socket 38 of the liquid injection degassing pipe 24 and the heat seal 37 of the hose 26 with the spring clip 28, Cut off the heat seal 37 of the hose 26, so that the pool core 22 can still be kept isolated from the outside world, connect the suction pipe 30 connected to the vacuum pump 32 to the hose 26, remove the spring clip 28 to the pool. Part of the gas generated during the charging and activation of the electrolyte in the core 22 is pumped, and then heat-seals the interlayer of the storage power device 20 that covers the liquid injection and degassing tube 24, and makes the liquid injection and degassing tube 24 and the electrolytic solution remaining in the tube The liquid is melted and extruded out of the interlayer to complete the degassing step.

Since the material of the liquid injection and degassing pipe 24 is a plastic material that can be tightly bonded to the interlayer, it can be completely sealed during heat sealing without air leakage, and the liquid injection and degassing pipe 24 can be used for vacuuming This part of the electrolyte will remain on the wall of the tube, so that the electrolyte can be removed when the tube is heat-sealed without the defective rate of air leakage caused by the contamination of the electrolyte. In the injected electrolyte Adding appropriate additives can make the gas output of the electric energy storage device 20 below a certain amount during charging and activation, and by controlling the liquid injection volume and electrolyte formula, the step of degassing after charging and activation can be avoided, that is, after the liquid injection is completed It can seal the edge and remove the tube for charging and activation; the liquid injection and degassing method can make the liquid injection process exempt from the degassing bag 16 and reduce the production cost of the electric energy storage device 20. The liquid injection and degassing method can It is used in the liquid injection and degassing process of various batteries and electrolytic capacitors (Electric Double Layer Capacitor) and other related electric energy storage devices.

In addition, the present invention can use the spring clip 28 to clamp the hose 26 or plug the hose 26 or heat seal the hose 26 with a plug after the pool core 22 of the electric energy storage device 20 has exhausted the gas to form a vacuum negative pressure, so that the pool The core 22 is kept under vacuum negative pressure, that is, it becomes the semi-finished product of the electric energy storage device 20, and is stored in the warehouse or transported to the main sales place for storage, and then the manufacturer will inject liquid into the semi-finished product of the electric energy storage device 20 according to the order quantity. The follow-up process is used to process the finished product of the electric energy storage device 20. This method can improve the service life of the electric energy storage device 20.

Because the electric energy storage device 20 must be charged and activated after the electrolyte is injected, when the electric energy storage device 20 is charged and activated, it means that the life of the electric energy storage device 20 begins, and the electric energy storage device 20 has a certain life, so when After the electric energy storage device 20 is charged and activated, it is not sold and stored in the warehouse for a period of time, which means that the service life of the electric energy storage device 20 has been shortened a lot, which will result in a short service life after the user purchases it. That is to say, it becomes a bad product, and by using the liquid injection method of the present invention, the electric energy storage device 20 can be processed into a semi-finished product and stored in the warehouse. When there is a need for processing and production, the follow-up process of injecting electrolyte can be performed In this way, the quality of the electric energy storage device 20 can be maintained, and the manufacturer can carry out the follow-up process according to the order. There is no need to store too many finished products, and new products can be provided to the seller at any time in response to the order, so as to achieve real-time (real time) production. management, and increase the service life of the electric energy storage device 20.

Therefore the present invention is actually one that has novelty and progress and can be used industrially, and should meet the patent application requirements of my country's patent law without doubt. The above is only a preferred embodiment of the present invention, and is not used to limit the scope of the present invention. Therefore, all equal changes and modifications made according to the shape, structure, and features described in the patent scope of the present invention should be included in the present invention.

Claims (9)

1, a kind of electrolyte filling method of electric storing device is characterized in that, includes the following step:

The installing pipeline communicates with the external world in the pond, inside of the electric storing device heart; Inject the electrolyte into pond, the inside heart of this electric storing device by this pipeline; And the interlayer of the electric storing device of this coating pipeline of heat-sealing, and this pipeline hot melt when heat-sealing is extruded.

2, the electrolyte filling method of electric storing device as claimed in claim 1 is characterized in that, wherein seals the interlayer of the electric storing device of this coating pipeline, gets final product electricizing activation after finishing the fluid injection step.

3, the electrolyte filling method of electric storing device as claimed in claim 1 is characterized in that, wherein installs in this pipeline step, and this pipeline is pond, the inside heart that is installed in the non-conductive pommel side of this electric storing device.

4, the electrolyte filling method of electric storing device as claimed in claim 1, it is characterized in that, before wherein injecting the electrolyte into the step of pond, the inside heart of this electric storing device, comprise by this pipeline and extract pond, the inside motive body of this electric storing device out form vacuum negative pressure condition step by this pipeline.

5, the electrolyte filling method of electric storing device as claimed in claim 1 is characterized in that, the step of wherein injecting this electrolyte comprises that the adding additive is in the step of this electrolyte.

6, a kind of fluid injection of electric storing device and degasification method is characterized in that, it includes the following step:

The installing pipeline communicates with the external world in the pond, inside of the electric storing device heart; Inject the electrolyte into pond, the inside heart of this electric storing device by this pipeline; With this electric storing device electricizing activation; The gas of bleeding and producing behind pond, the inside heart electricizing activation of removing this electric storing device by this pipeline; And the interlayer of the electric storing device of this coating pipeline of heat-sealing, and this pipeline hot melt when heat-sealing is extruded.

7, the fluid injection of electric storing device as claimed in claim 6 and degasification method is characterized in that, wherein install in this pipeline step, and this pipeline is pond, the inside heart that is installed in the non-conductive pommel side of this electric storing device.

8, the fluid injection of electric storing device as claimed in claim 6 and degasification method, it is characterized in that, before wherein injecting the electrolyte into the step of pond, the inside heart of this electric storing device, comprise by this pipeline and extract pond, the inside motive body of this electric storing device out form vacuum negative pressure condition step by this pipeline.

9, the fluid injection of electric storing device as claimed in claim 6 and degasification method is characterized in that, the step of wherein injecting this electrolyte comprises that the adding additive is in the step of this electrolyte.

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