阅读说明：本技术 锂电池自动注液系统 (Lithium battery automatic fluid injection system ) 是由 李骜雪 曾玉祥 徐延铭 朱玉琪 于 2019-09-10 设计创作，主要内容包括：锂电池自动注液系统,包括：工控机；向电芯输送电解液的变量泵,所述变量泵的输出管路上设置有真空注液泵嘴,通过所述真空注液泵嘴向电芯注入电解液；与所述工控机通信连接的电磁阀,所述电磁阀控制所述真空注液泵嘴出液口的打开或关闭；用于控制所述变量泵的输出量的变量泵控制器,所述变量泵控制器与所述工控机通信连接；与所述工控机通信连接的电子秤。所述电子秤将注液完成的电池的重量信息反馈给所述工控机,所述工控机根据反馈信息向所述变量泵控制器发送指令,调节所述变量泵的输出量。本发明的注液系统采用变量泵来控制电解液的输出量,可根据电子秤反馈的电池重量信息对注液量进行调整,系统稳定性好,自动化程度高。(Lithium battery automatic fluid injection system, comprising: industrial personal computer；To the variable pump of battery core conveying electrolyte, it is provided with vacuum impregnating liquid pump mouth on the output pipe of the variable pump, electrolyte is injected to battery core by the vacuum impregnating liquid pump mouth；With the solenoid valve of industrial personal computer communication connection, vacuum impregnating liquid pump mouth liquid outlet described in the solenoid valve control is opened or closed；For controlling the variable pump controller of the output quantity of the variable pump, the variable pump controller and the industrial personal computer are communicated to connect；With the electronic scale of industrial personal computer communication connection.The weight information for the battery that fluid injection is completed is fed back to the industrial personal computer by the electronic scale, and the industrial personal computer sends to the variable pump controller according to feedback information and instructs, and adjusts the output quantity of the variable pump.Liquid injection system of the invention controls the output quantity of electrolyte using variable pump, can be adjusted according to the battery weight information that electronic scale is fed back to reservoir quantity, system stability is good, high degree of automation.)

1. lithium battery automatic fluid injection system characterized by comprising

Industrial personal computer；

To the variable pump of battery core conveying electrolyte, it is provided with vacuum impregnating liquid pump mouth on the output pipe of the variable pump, passes through institute It states vacuum impregnating liquid pump mouth and injects electrolyte to battery core；

With the solenoid valve of industrial personal computer communication connection, the opening of vacuum impregnating liquid pump mouth liquid outlet described in the solenoid valve control or It closes；

For controlling the variable pump controller of the output quantity of the variable pump, the variable pump controller is communicated with the industrial personal computer Connection；

With the electronic scale of industrial personal computer communication connection.

2. lithium battery automatic fluid injection system as described in claim 1, it is characterised in that: the vacuum impregnating liquid pump mouth includes:

The shell of hollow tubular, the interior of shell have the reservoir channel for extending to the outer casing bottom, the reservoir channel It is connected to the inlet for being set to the cover top portion and the liquid outlet for being set to the outer casing bottom；

The plug being set at the liquid outlet, the plug can move up and down in the reservoir channel, thus to it is described go out Liquid mouth is blocked or is opened the liquid outlet；

It is set to the guide rod of the reservoir channel, the bottom of the guide rod is connected with the plug；

The mobile control mechanism of the guide rod being connected with the guide rod, the mobile control mechanism of the guide rod pass through described in guide rod control Plug moves up and down.

3. lithium battery automatic fluid injection system as claimed in claim 2, it is characterised in that: the mobile control mechanism of the guide rod is gas Cylinder, the piston rod of cylinder protrude into the reservoir channel and are connected with the guide rod.

4. lithium battery automatic fluid injection system as claimed in claim 2 or claim 3, it is characterised in that: the mobile control mechanism of the guide rod It is set to the top of the shell.

5. lithium battery automatic fluid injection system as claimed in claim 2 or claim 3, it is characterised in that: the guide rod and the plug connect It is integrated.

6. lithium battery automatic fluid injection system as claimed in claim 2 or claim 3, it is characterised in that: the inlet is located at described outer On side wall at the top of shell.

Technical field

The present invention relates to lithium battery manufacturing technology field more particularly to a kind of lithium battery automatic fluid injection systems.

Background technique

Lithium ion battery in normal work, is drawn just by the negative pole end of negative current collector extraction and by plus plate current-collecting body Electronics access is extremely formed with external circuit, the lithium ion in electrolyte and positive and negative electrode active material forms ion channels, and electronics is logical Circuit is collectively formed in road and ion channels, to achieve the purpose that normal work.As the demand of lithium ion battery is gradually increased, People are also higher and higher to the performance requirement of its various aspects, especially for the requirement of the cycle performance of battery, and the note of battery Liquid measure is the important parameter for guaranteeing circulating battery, and reservoir quantity is very few to will lead to that loop attenuation is too fast, causes the service life of battery Decay too fast, reservoir quantity excessively will cause the swollen liquid of battery again, destroy the overall structure of battery.

Lithium battery filling machine used in the production process of lithium battery, which is substantially, at present carries out fluid injection using constant displacement pump, Reservoir quantity is unable to adjust automatically, is open loop type control system, and stability is poor, and strip, needle are easy to appear in injection process Pointed electrolyte contamination.

Summary of the invention

The purpose of the present invention is to provide a kind of lithium battery automatic fluid injection systems of closed loop control.

To achieve the goals above, the present invention takes following technical solution:

Lithium battery automatic fluid injection system, comprising: industrial personal computer；To the variable pump of battery core conveying electrolyte, the variable pump It is provided with vacuum impregnating liquid pump mouth on output pipe, electrolyte is injected to battery core by the vacuum impregnating liquid pump mouth；With the industry control The solenoid valve of machine communication connection, vacuum impregnating liquid pump mouth liquid outlet described in the solenoid valve control open or close；For controlling The variable pump controller of the output quantity of the variable pump, the variable pump controller and the industrial personal computer communicate to connect；With it is described The electronic scale of industrial personal computer communication connection.

From the above technical scheme, it is provided with electronic scale and variable pump in liquid injection system of the invention, is adopted with existing It is compared with the system that constant displacement pump carries out battery core fluid injection, the weight information for the battery that fluid injection is completed can be fed back to industry control by electronic scale Machine, industrial personal computer can send to variable pump controller according to feedback information and instruct, and carry out the output quantity of adjust automatically variable pump, realization is closed Ring type control, improves the stability of system.

Further, the vacuum impregnating liquid pump mouth includes: the shell of hollow tubular, and the interior of shell, which has, extends to institute It states the reservoir channel of outer casing bottom, the reservoir channel and is set to the inlet of the cover top portion and is set to the shell The liquid outlet of bottom is connected to；The plug being set at the liquid outlet, the plug can move up and down in the reservoir channel, So that the liquid outlet is blocked or be opened the liquid outlet；It is set to the guide rod of the reservoir channel, the guide rod Bottom be connected with the plug；The mobile control mechanism of the guide rod being connected with the guide rod, the mobile control mechanism of the guide rod are logical The guide rod control plug is crossed to move up and down.

Plug is set to the bottom of reservoir channel, after vacuum impregnating liquid pump mouth is closed, remaining electrolyte is terminated to note In liquid channel, it will not flow outwardly, not will cause dropping liquid, can be polluted to avoid to battery core.

Further, the mobile control mechanism of the guide rod is cylinder, and the piston rod of cylinder protrudes into the reservoir channel And it is connected with the guide rod.

Using cylinder as the mobile control mechanism of guide rod, structure is simple, and cylinder is standard component, at low cost.

Further, the mobile control mechanism of the guide rod is set to the top of the shell.

Further, the guide rod and the plug are linked together.

Further, the inlet is located on the side wall of the cover top portion.

Detailed description of the invention

It in order to illustrate the embodiments of the present invention more clearly, below will be to required use in embodiment or description of the prior art Attached drawing do simple introduction, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ability For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached Figure.

Fig. 1 is the structural block diagram of the embodiment of the present invention；

Fig. 2 is the circuit diagram of the embodiment of the present invention；

Fig. 3 is the structural schematic diagram of vacuum impregnating of embodiment of the present invention liquid pump mouth；

Fig. 4 is the cross-sectional view of the line A-A along Fig. 3.

A specific embodiment of the invention is described in more detail below in conjunction with attached drawing.

Specific embodiment

In order to above and other objects of the present invention, feature and advantage can be become apparent from, the embodiment of the present invention is cited below particularly, And cooperate appended diagram, it is described below in detail.

As depicted in figs. 1 and 2, the lithium battery automatic fluid injection system of the present embodiment includes industrial personal computer 1, variable pump 2, variable pump Controller 3, vacuum impregnating liquid pump mouth 4, solenoid valve 5 and electronic scale 6.Industrial personal computer 1 is controlled by signal wire (shielding line) and variable pump Device 3 communicates to connect, and Xiang Bianliang pump controller 3 sends the information command of reservoir quantity, and variable pump controller 3 controls variable according to instruction The output quantity of pump 3.The intake line of variable pump 3 is connected with electrolyte fluid reservoir, and vacuum impregnating liquid pump mouth 4 is arranged on output pipe, Electrolyte is injected to lithium battery by vacuum impregnating liquid pump mouth 4.4 liquid outlet of vacuum impregnating liquid pump mouth is opened or closed by solenoid valve 5 Control, solenoid valve 5 and industrial personal computer 1 communicate to connect.Industrial personal computer 1 is also connected by shielding line with electronic scale 6 simultaneously, and electronic scale 6 is used It weighs in the lithium battery that fluid injection is completed.

Referring to Fig. 3 and Fig. 4, the vacuum impregnating liquid pump mouth 4 of the present embodiment includes shell 4-1, and shell 4-1 is hollow tubulose, There is reservoir channel Q, reservoir channel Q to extend to the bottom of shell 4-1 for its inside, connect with the liquid outlet 4-1b of the bottom shell 4-1 It is logical.Inlet 4-1a is machined at the top of shell 4-1, inlet 4-1a is located on the side wall at the top of shell 4-1, inlet 4- 1a is connected to reservoir channel Q, and electrolyte is injected from inlet 4-1a, is flowed out into reservoir channel Q, then from liquid outlet 4-1b. Plug 4-2 is provided at liquid outlet 4-1b, plug 4-2 can be moved up and down in reservoir channel Q, thus to liquid outlet 4-1b into Row blocks or opens liquid outlet 4-1b.A guide rod 4-3, the bottom of guide rod 4-3 and plug 4-2 are provided in reservoir channel Q It is connected, for controlling movement of the plug 4-2 in reservoir channel Q, the guide rod 4-3 and plug 4-2 of the present embodiment are linked together.In The mobile control mechanism 4-5 of guide rod is provided with outside the top of shell 4-1, the mobile control mechanism 4-5 of the guide rod of the present embodiment is cylinder, The piston rod of cylinder protrudes into reservoir channel Q, is connected with guide rod 4-3, can pass through guide rod 4-3 when cylinder movement and drive plug 4-2 It moves up or down.The movement (up and down motion) of cylinder is controlled by solenoid valve 5.

Plug 4-2 is set to the bottom of reservoir channel Q by the present embodiment, and plug 4-2 is by the liquid outlet of the bottom reservoir channel Q After 4-1b is blocked, remaining electrolyte is terminated in reservoir channel Q, will not be flowed outwardly, not will cause dropping liquid, compared to existing Some fluid injection syringe needles are located at the top of needle tubing due to switching, even if after being closed by switch control fluid injection, remaining electricity in needle tubing Solution liquid still can flow outwardly, it may appear that strip, tip-like electrolyte pollute battery core.

The workflow of liquid injection system of the invention are as follows:

Battery core is sent to fluid injection station, industrial personal computer 1 sends control signal to solenoid valve 5, and solenoid valve 5 is according to control signal control Cylinder movement processed drives guide rod and plug to move upwards by the piston rod of cylinder, and the liquid outlet of vacuum impregnating liquid pump mouth 4 is opened； Industrial personal computer 1 sends the information command of initial reservoir quantity to variable pump controller 3 simultaneously, and variable pump controller 3 is controlled according to instruction Electrolyte is injected electrolyte, single battery core fluid injection to battery core by vacuum impregnating liquid pump mouth 4 by the output quantity of variable pump 2, variable pump 2 After, solenoid valve 5 closes vacuum impregnating liquid pump mouth 4 by controlling the movement of cylinder, stops the fluid injection of battery core；What fluid injection was completed Battery core is weighed at electronic scale 6, and weight information is fed back to industrial personal computer 1, and industrial personal computer 1 is according to feedback at electronic scale 6 Information is adjusted the reservoir quantity of variable pump 2, and the control system of a closed loop is consequently formed.

Liquid injection system of the invention carries out the output of electrolyte using variable pump, is carried out with the prior art using constant displacement pump Fluid injection is different, and the output quantity of variable pump can be with adjust automatically, the information fed back by industrial personal computer according to electronic scale, controls variable pump root Reservoir quantity size is automatically adjusted according to fluid injection situation, since liquid injection system has feedback element, closed-loop control is carried out to reservoir quantity, surely Qualitative more preferable, the degree of automation is higher.

The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention It is not intended to be limited to embodiment illustrated herein, and is to fit to consistent with the principles and novel features disclosed in this article Widest range.