Formation device for improving negative pressure of lithium ion battery

Abstract

The utility model discloses a formation device for improving the negative pressure of a lithium ion battery, which relates to the technical field of batteries, and comprises a cabinet body part and a pipeline part, the cabinet body part comprises a formation cabinet, a plurality of transversely arranged clapboards are arranged in the formation cabinet at equal intervals from top to bottom, and the clapboards are used for placing batteries; the pipeline part comprises a discharge pipe, and the discharge pipe is vertically arranged, penetrates through all the partition plates from top to bottom and is communicated with the battery through a hose; the upper ends of the discharge pipes are communicated with the interior of the electrolyte barrel, and the lower ends of the discharge pipes are communicated with the electrolyte collecting barrel; according to the lithium ion battery negative pressure formation device, full automation is achieved, the problem of gas and liquid discharging in the negative pressure formation process of the lithium ion battery is solved, meanwhile, automatic liquid supplementing can be carried out, the consistency of formed battery cells is guaranteed, and higher practical value is provided for adopting different electrolytes for one-time and two-time injection.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, concretely relates to a kind of improvement lithium ion battery negative pressure formation device. BACKGROUND

[0002] Lithium ion battery formation procedure is to the first time charging of battery, forms a layer of solid electrolyte interface, i.e. SEI film. Formation reaction includes the reduction of water, solvent, additive and other substances, with a large amount of gas production. The generation of gas can increase the transmission path of lithium ion in the formation process, cause anode lithium intercalation to be blocked, interface black spot lithium, battery swelling. Therefore, when mass production lithium ion battery is produced, the way of negative pressure formation is used, and the negative pressure level is-70~-90kPa.

[0003] Through negative pressure formation, gas in the process is discharged, but the process can bring a certain amount of electrolyte, which can cause the amount of electrolyte inside the cell to be different. If the first injection and the second injection use different electrolyte solutions, it will bring differences to the amount of second injection electrolyte, thereby causing the difference of cell. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of improvement lithium ion battery negative pressure formation device to solve the above-mentioned defects caused in prior art.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of improvement lithium ion battery negative pressure formation device, including cabinet portion and pipeline portion, the cabinet portion includes formation cabinet, several pieces of transverse setting baffle are set from top to bottom at equal intervals in the formation cabinet, and the baffle is used to place battery;

[0006] The pipeline portion includes discharge pipe, the discharge pipe is vertically arranged and penetrates all baffle from top to bottom and is communicated with battery by hose;

[0007] The upper end of the discharge pipe is all connected in electrolyte barrel, and the lower end of the discharge pipe is all connected on liquid collection barrel;

[0008] The lower of the battery is equipped with weighing platform.

[0009] Preferably, the bottom of the formation cabinet is equipped with support plate, the support plate is obliquely arranged and the lowest part is located at liquid collection barrel.

[0010] Preferably, the hose is equipped with stop valve.

[0011] Preferably, the top of the discharge pipe is connected on liquid injection pipe and exhaust pipe respectively, and the liquid injection pipe is connected between discharge pipe and electrolyte barrel.

[0012] Preferably, the bottom of the exhaust pipe is connected to a drain pipe on the support plate.

[0013] Compared with the prior art, the present application has the following advantages:

[0014] 1. The present application realizes full automation, ensures the exhaust and liquid discharge of lithium ion batteries during negative pressure formation, can automatically supplement liquid, ensures the consistency of the battery after formation, and provides higher practical value for the use of different electrolytes for one or two injections.

[0015] 2. The present application can supplement liquid to the battery after formation according to the weighing table at the bottom, in combination with the host computer software and PLC control system of the equipment, to ensure the consistency of the battery after formation. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The present application is a structural schematic diagram.

[0017] Among them: 1-formation cabinet; 2-battery; 3-stop valve; 4-weighing table; 5-control system; 6-support plate; 7-hose; 8-exhaust pipe; 9-liquid injection pipe; 10-drain pipe; 11-liquid collection barrel; 12-electrolyte barrel; 13-exhaust pipe. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application will be further described in conjunction with the specific embodiments.

[0019] Please refer to Figure 1 The present application provides a technical solution: an improved lithium ion battery negative pressure formation device, comprising a cabinet part and a pipeline part, the cabinet part comprises a formation cabinet 1, a plurality of transversely arranged partitions are arranged at equal intervals from top to bottom in the formation cabinet 1, and the partitions are used for placing batteries 2.

[0020] The pipeline part comprises an exhaust pipe 8, the exhaust pipe 8 is vertically arranged and penetrates all the partitions from top to bottom and is in communication with the battery 2 through the hose 7;

[0021] The upper end of the exhaust pipe 8 is connected to the electrolyte barrel 12, and the lower end of the exhaust pipe 8 is connected to the liquid collection barrel 11.

[0022] A weighing table 4 is arranged below the battery 2, the weighing table 4 is connected to the externally arranged PLC control system 5 through a circuit, and all the valves are controlled through the PLC control system 5.

[0023] In the present embodiment, the bottom of the formation cabinet 1 is provided with a support plate 6, the support plate 6 is arranged obliquely and the lowest part is located at the liquid collection barrel 11, and the inclined support plate 6 facilitates liquid discharge.

[0024] In the embodiment, the hose 7 is provided with a stop valve 3 for controlling the liquid and gas in and out.

[0025] In the embodiment, the top of the discharge pipe 8 is connected to the liquid injection pipe 9 and the exhaust pipe 13 respectively, the liquid injection pipe 9 is connected between the discharge pipe 8 and the electrolyte tank 12, and valves are arranged on the liquid injection pipe 9 and the exhaust pipe 13 for separate control.

[0026] In the embodiment, the bottom of the discharge pipe 8 is connected to the liquid discharge pipe 10, which is arranged on the support plate 6, and the liquid discharge pipe 10 is used for discharging excess liquid.

[0027] Working principle: when the lithium ion battery 2 enters the formation cabinet, the valve of the liquid injection pipe 9 is closed, other valves are opened, and the weight of the battery cell is collected by each weighing table 4, and the system is uploaded through the equipment host computer software, the battery cell is formed, after the formation is completed, the valves of the liquid discharge pipe 10 and the exhaust pipe 13 are closed, and the weight of the battery cell is recorded again, if the weight of the battery cell is greater than or equal to the set value, the stop valve 3 on the hose 7 is closed through the PLC control system 5, and the battery 2 enters the next process; if it is lower than the set value, the difference is calculated through the cooperation of the equipment host computer software and the PLC control system 5, the liquid injection pipe 9 is opened to supplement the liquid, the set value is reached, and the battery 2 enters the next process.

[0028] As can be known from common technical knowledge, the utility model can be realized through other embodiments without departing from the spirit or essential characteristics. Therefore, the above-mentioned disclosed embodiments are only examples and are not the only ones. All changes within the scope of the utility model or within the scope equivalent to the utility model are included in the utility model.

Claims

1. An improved lithium-ion battery negative pressure formation device, characterized in that: The application relates to a battery production device, which comprises a cabinet part and a pipeline part, wherein the cabinet part comprises a formation cabinet (1), a plurality of transversely arranged partitions are arranged in the formation cabinet (1) at equal intervals from top to bottom, and the partitions are used for placing batteries (2); the pipeline part comprises discharge pipes (8), the discharge pipes (8) are vertically arranged and penetrate all the partitions from top to bottom, and the discharge pipes (8) are communicated with the batteries (2) through hoses (7); upper ends of the discharge pipes (8) are communicated in electrolyte barrels (12), and lower ends of the discharge pipes (8) are communicated on liquid collecting barrels (11); a weighing table (4) is arranged below the batteries (2).

2. The improved negative pressure formation device for lithium ion battery of claim 1, wherein: a supporting plate (6) is arranged at the bottom of the formation cabinet (1), the supporting plate (6) is arranged in an inclined mode, and the lowest position of the supporting plate (6) is located at the liquid collecting barrel (11).

3. The improved negative pressure formation device for lithium ion battery of claim 1, wherein: a stop valve (3) is arranged on the hose (7).

4. The improved negative pressure formation device for lithium ion battery of claim 1, wherein: tops of the discharge pipes (8) are respectively communicated on liquid injection pipes (9) and exhaust pipes (13), and the liquid injection pipe (9) is connected between the discharge pipe (8) and the electrolyte barrel (12).

5. The improved negative pressure formation device for lithium ion battery of claim 2, wherein: bottoms of the discharge pipes (8) are communicated on liquid discharge pipes (10), and the liquid discharge pipe (10) is located on the supporting plate (6).

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