Battery negative pressure formation and post-formation liquid supplementing integrated device
The integrated device for battery formation and post-formation fluid replenishment synchronizes electrolyte replenishment during negative pressure formation, reducing costs and cycle time by combining processes on a single equipment setup.
Patent Information
- Application Number
- CN202420230711.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-30
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-01-30
AI Technical Summary
Conventional battery formation and post-formation electrolyte replenishment processes are separate, leading to increased investment costs and prolonged production cycles.
An integrated device that combines negative pressure formation and post-formation fluid replenishment processes using a vacuum mechanism, formation mechanism, and liquid replenishment mechanism, incorporating solenoid valves and an injection pump to synchronize electrolyte replenishment during formation.
Reduces equipment investment costs and shortens the production cycle by integrating formation and electrolyte replenishment, utilizing electrolyte reflux for synchronous liquid replenishment.
Smart Images
Figure CN222146327U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of battery formation, in particular to a negative pressure formation and post-formation liquid replenishment integrated device for batteries. Background Art
[0002] The statements herein merely provide background art related to the present invention and do not necessarily constitute prior art.
[0003] Batteries such as square power batteries need to be formed after filling. The conventional formation process is generally as follows: Figure 1 As shown, the battery to be formed is placed in a formation cabinet under normal pressure conditions. The battery filling port is connected to a liquid storage cup, and the inside of the battery is evacuated to form a negative pressure (i.e., negative pressure is drawn). The purpose is to remove the gas generated by the internal reaction of the battery. Under normal circumstances, the gas production inside the battery is large during negative pressure formation, causing the electrolyte inside the battery to overflow into the liquid storage cup with the gas. At this time, the normal pressure is connected to empty it, and the battery is removed from the cabinet to complete the formation. Since there may be residual electrolyte in the liquid storage cup, causing electrolyte loss and battery quality problems, the electrolyte is replenished after the square power battery is formed, that is, the secondary injection process.
[0004] At present, battery formation and post-formation refilling are two independent processes, which are completed by corresponding formation equipment and refilling equipment respectively. However, on the basis of battery formation equipment, setting up independent refilling equipment to perform secondary refilling of power batteries increases investment costs on the one hand and prolongs the production cycle on the other. Utility Model Content
[0005] In view of the above-mentioned problems and defects existing in the prior art, the utility model provides an integrated device for negative pressure formation and post-formation fluid replenishment of a battery, which integrates the negative pressure formation and post-formation fluid replenishment processes, combines the two processes on the same equipment, realizes the integrated operation of formation and post-formation fluid replenishment, reduces equipment investment costs, and shortens the product production cycle.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] A battery negative pressure formation and post-formation liquid replenishment integrated device, comprising a negative pressure vacuum mechanism, a formation mechanism and a liquid replenishment mechanism;
[0008] The formation mechanism includes a formation cabinet, in which a liquid storage cup is provided, and the liquid storage cup is connected to the liquid injection port of the battery to be formed; the negative pressure vacuum mechanism includes a vacuum tank, which is connected to the liquid storage cup through a first pipeline, a first solenoid valve is provided on the first pipeline, the liquid storage cup is connected to the external air through a second pipeline, and a second solenoid valve is provided on the second pipeline; the liquid replenishment mechanism includes a reserve liquid cup, which is connected to the liquid storage cup through a third pipeline, and a third solenoid valve is provided on the third pipeline.
[0009] According to a further technical solution, the liquid storage cup is used to temporarily store the electrolyte to be formed inside the battery.
[0010] According to a further technical solution, the fluid replenishing mechanism also includes an electrolyte barrel and a fluid injection pump.
[0011] According to a further technical solution, the electrolyte barrel and the reserve liquid cup are connected via a fourth pipeline, and a liquid injection pump and a fourth solenoid valve are provided on the fourth pipeline.
[0012] According to a further technical solution, the injection pump is arranged at one end close to the electrolyte barrel, and the fourth solenoid valve is arranged at one end close to the reserve liquid cup.
[0013] According to a further technical solution, the electrolyte barrel stores electrolyte, and the injection pump is used to pump out the electrolyte in the electrolyte barrel.
[0014] A further technical solution also includes a control terminal and a plurality of drive motors electrically connected to the control terminal, wherein the plurality of drive motors correspond one to one with the plurality of solenoid valves.
[0015] According to a further technical solution, the control terminal is electrically connected to the injection pump.
[0016] A further technical solution is that the multiple drive motors include a first drive motor, a second drive motor, a third drive motor, and a fourth drive motor; the control terminal is electrically connected to the first drive motor, and the first drive motor is electrically connected to the first solenoid valve; the control terminal is electrically connected to the second drive motor, and the second drive motor is electrically connected to the second solenoid valve; the control terminal is electrically connected to the third drive motor, and the third drive motor is electrically connected to the third solenoid valve; the control terminal is electrically connected to the fourth drive motor, and the fourth drive motor is electrically connected to the fourth solenoid valve.
[0017] According to a further technical solution, the formation cabinet comprises a positive electrode probe and a negative electrode probe, wherein the positive electrode probe is electrically connected to the positive electrode of the battery to be formed, and the negative electrode probe is electrically connected to the negative electrode of the battery to be formed.
[0018] Compared with the prior art, the utility model has the following beneficial effects:
[0019] The utility model provides an integrated device for negative pressure formation and post-formation liquid replenishment of a battery, which integrates the negative pressure formation and post-formation liquid replenishment processes, combines the two processes on the same equipment, and utilizes the electrolyte reflux process after negative pressure formation to achieve synchronous liquid replenishment, thereby realizing integrated operation of formation and post-formation liquid replenishment, reducing investment in liquid replenishment equipment procurement, plant layout, etc., reducing equipment investment costs, shortening the process flow and product production cycle, and achieving cost reduction and efficiency improvement. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.
[0021] Figure 1 It is a schematic diagram of the structure of a voltage formation device in the prior art;
[0022] Figure 2 The utility model is a schematic structural diagram of a battery negative pressure formation and post-formation liquid replenishment integrated device.
[0023] Among them, 1. the first solenoid valve; 2. the second solenoid valve; 3. the third solenoid valve; 4. the fourth solenoid valve; 5. the vacuum tank; 6. the positive electrode probe of the formation cabinet; 7. the liquid storage cup; 8. the negative electrode probe of the formation cabinet; 9. the reserve liquid cup; 10. the liquid injection pump; 11. the electrolyte barrel. DETAILED DESCRIPTION
[0024] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.
[0025] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0026] like Figure 1 As shown, in the traditional square power battery formation process, the electrolyte needs to be temporarily stored in the formation cabinet storage cup due to negative pressure during formation, and then emptied after the formation is completed, and the battery is removed from the cabinet. Specifically, before the battery is formed, close the second solenoid valve, open the first solenoid valve to evacuate, the formation cabinet storage cup reaches the set vacuum pressure, the positive and negative probes of the formation cabinet are energized, and the formation begins; after the formation is completed, close the first solenoid valve, open the second solenoid valve to empty, and the battery is removed from the cabinet; the battery is transferred to the rehydration (i.e., secondary injection) process to replenish the electrolyte.
[0027] However, the above existing solutions have the problems of high cost and long production cycle. Figure 2As shown, the utility model provides an integrated device for negative pressure formation and post-formation liquid replenishment of a battery, including a negative pressure vacuum mechanism, a formation mechanism and a liquid replenishment mechanism. Among them, the formation mechanism includes a formation cabinet, in which a liquid storage cup 7 is provided, and the liquid storage cup 7 is connected to the liquid injection port of the battery to be formed, and is used to temporarily store the electrolyte inside the battery to be formed; the negative pressure vacuum mechanism includes a vacuum tank 5, and the vacuum tank 5 is connected to the liquid storage cup 7 through a first pipeline, and a first electromagnetic valve 1 is provided on the first pipeline, and the liquid storage cup 7 is connected to the external air through a second pipeline, and a second electromagnetic valve 2 is provided on the second pipeline. Further, the formation cabinet includes a positive electrode probe 6 of the formation cabinet and a negative electrode probe 8 of the formation cabinet, and the positive electrode probe 6 of the formation cabinet is electrically connected to the positive electrode of the battery to be formed, and the negative electrode probe 8 of the formation cabinet is electrically connected to the negative electrode of the battery to be formed. Through the above-mentioned negative pressure vacuum mechanism and the formation mechanism, the formation process of the battery to be formed is realized.
[0028] The device proposed in the utility model is also provided with a fluid replenishment mechanism, which combines the two processes of formation and post-formation fluid replenishment. The fluid replenishment mechanism includes a reserve liquid cup 9, which is connected to the liquid storage cup 7 through a third pipeline, and a third solenoid valve 3 is provided on the third pipeline; the fluid replenishment mechanism also includes an electrolyte barrel 11 and an injection pump 10, the electrolyte barrel 11 and the reserve liquid cup 9 are connected through a fourth pipeline, and an injection pump 10 and a fourth solenoid valve 4 are provided on the fourth pipeline, wherein the injection pump 10 is arranged at one end close to the electrolyte barrel 11, and the fourth solenoid valve 4 is arranged at one end close to the reserve liquid cup 9, the electrolyte barrel 11 stores electrolyte, and the injection pump 10 is used to pump the electrolyte in the electrolyte barrel into the reserve liquid cup. Specifically, during the negative pressure formation process of the power battery, the electrolyte required to supplement the battery by weight is pumped into the reserve liquid cup from the electrolyte barrel by controlling the injection pump. When the negative pressure formation is completed, the electrolyte in the reserve liquid cup is merged into the storage cup according to the characteristic of the vacuum-breaking electrolyte flowing back to the inside of the battery shell, thereby integrating the formation electrolyte storage and post-formation liquid replenishment.
[0029] Furthermore, the device proposed in the utility model also includes a control terminal and a plurality of drive motors electrically connected to the control terminal, and the plurality of drive motors correspond one-to-one to the plurality of solenoid valves. Specifically, the plurality of drive motors include a first drive motor, a second drive motor, a third drive motor, and a fourth drive motor; the control terminal is electrically connected to the first drive motor, and the first drive motor is electrically connected to the first solenoid valve; the control terminal is electrically connected to the second drive motor, and the second drive motor is electrically connected to the second solenoid valve; the control terminal is electrically connected to the third drive motor, and the third drive motor is electrically connected to the third solenoid valve; the control terminal is electrically connected to the fourth drive motor, and the fourth drive motor is electrically connected to the fourth solenoid valve, and the opening and closing of the drive solenoid valve is controlled by the control terminal; at the same time, the control terminal is electrically connected to the injection pump, and the operation of the injection pump is controlled by the control terminal, thereby controlling the weight of the electrolyte pumped from the electrolyte barrel into the reserve liquid cup.
[0030] The specific working process of the utility model is as follows:
[0031] Step 1, placing the battery to be formed in a formation cabinet, the positive electrode probe 6 of the formation cabinet is electrically connected to the positive electrode of the battery to be formed, the negative electrode probe 8 of the formation cabinet is electrically connected to the negative electrode of the battery to be formed, the second solenoid valve 2 and the third solenoid valve 3 are closed, the first solenoid valve 1 is opened to evacuate the liquid storage cup to reach the set vacuum value, the positive and negative electrode probes are energized, and the formation begins;
[0032] Step 2, during the formation, the fourth solenoid valve 4 is opened synchronously, the injection pump 10 is driven, the electrolyte in the electrolyte barrel 11 is pumped out, and the electrolyte of the required weight is pumped out to the reserve liquid cup 9, and the liquid replenishment (i.e., secondary injection) operation is performed after the formation is completed;
[0033] Step 3: After the formation is completed, close the first solenoid valve 1, open the third solenoid valve 3 and the second solenoid valve 2, so that the electrolyte in the reserve liquid cup flows into the liquid storage cup, and then close the third solenoid valve 3 and the second solenoid valve 2;
[0034] Step 4, open the first solenoid valve 1, evacuate to the set vacuum value, close the first solenoid valve 1, and then open the second solenoid valve 2. After the electrolyte flows into the battery, close the second solenoid valve 2; repeat step 4 until the electrolyte in the storage cup completely flows into the battery, completing the formation and rehydration process.
[0035] The battery negative pressure formation and post-formation liquid replenishment integrated device proposed by the utility model integrates the negative pressure formation and post-formation liquid replenishment processes, combines the two processes on the same equipment, and utilizes the electrolyte reflux process after negative pressure formation to achieve synchronous liquid replenishment, thereby realizing the integrated operation of formation and post-formation liquid replenishment, reducing equipment investment costs, shortening the process flow and product production cycle, and achieving cost reduction and efficiency improvement.
[0036] Although the above describes the specific implementation methods of the utility model in combination with the accompanying drawings, it is not intended to limit the scope of protection of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution of the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the utility model.
Claims
1. A battery negative pressure formation and post-formation liquid replenishment integrated device, characterized in that: It includes negative pressure vacuum mechanism, chemical formation mechanism and fluid replenishment mechanism; The formation mechanism comprises a formation cabinet, in which a liquid storage cup is provided, and the liquid storage cup is connected to the liquid injection port of the battery to be formed; the negative pressure vacuum mechanism comprises a vacuum tank, which is connected to the liquid storage cup through a first pipeline, a first solenoid valve is provided on the first pipeline, the liquid storage cup is connected to the external air through a second pipeline, and a second solenoid valve is provided on the second pipeline; the liquid replenishment mechanism comprises a reserve liquid cup, which is connected to the liquid storage cup through a third pipeline, and a third solenoid valve is provided on the third pipeline; The replenishing mechanism also includes an electrolyte barrel and an injection pump; the electrolyte barrel and the reserve liquid cup are connected through a fourth pipeline, and the fourth pipeline is provided with an injection pump and a fourth solenoid valve; the injection pump is arranged at one end close to the electrolyte barrel, and the fourth solenoid valve is arranged at one end close to the reserve liquid cup; the electrolyte barrel stores electrolyte, and the injection pump is used to pump out the electrolyte in the electrolyte barrel.
2. The integrated device for negative pressure formation and post-formation liquid replenishment of a battery as claimed in claim 1, characterized in that: The liquid storage cup is used for temporarily storing the electrolyte to be formed inside the battery.
3. The integrated device for negative pressure formation and post-formation liquid replenishment of a battery as claimed in claim 1, characterized in that: It also includes a control terminal and a plurality of drive motors electrically connected to the control terminal, and the plurality of drive motors correspond to the plurality of solenoid valves one by one.
4. The integrated device for negative pressure formation and post-formation liquid replenishment of a battery as claimed in claim 3, characterized in that: The control terminal is electrically connected to the injection pump.
5. The integrated device for negative pressure formation and post-formation liquid replenishment of a battery as claimed in claim 3, characterized in that: The multiple drive motors include a first drive motor, a second drive motor, a third drive motor, and a fourth drive motor; the control terminal is electrically connected to the first drive motor, and the first drive motor is electrically connected to the first solenoid valve; the control terminal is electrically connected to the second drive motor, and the second drive motor is electrically connected to the second solenoid valve; the control terminal is electrically connected to the third drive motor, and the third drive motor is electrically connected to the third solenoid valve; the control terminal is electrically connected to the fourth drive motor, and the fourth drive motor is electrically connected to the fourth solenoid valve.
6. The integrated device for negative pressure formation and post-formation liquid replenishment of a battery as claimed in claim 1, characterized in that: The formation cabinet comprises a positive electrode probe and a negative electrode probe. The positive electrode probe is electrically connected to the positive electrode of the battery to be formed, and the negative electrode probe is electrically connected to the negative electrode of the battery to be formed.