Search

CN-224217684-U - Liquid injection device and liquid injection equipment

CN224217684UCN 224217684 UCN224217684 UCN 224217684UCN-224217684-U

Abstract

The utility model relates to a liquid injection device and liquid injection equipment, the liquid injection device comprises a liquid injection cup and a liquid injection needle, and electrolyte is injected into the liquid injection cup in advance. The liquid injection needle penetrates through the corresponding liquid injection cup, and the liquid injection cup can move along the liquid injection needle. When the liquid is injected, the battery is firstly fed to the liquid injection tray, the liquid injection tray drives the battery to the lower part of the liquid injection device, and the liquid outlet of the liquid injection needle is aligned with the liquid injection hole of the battery through positioning. Then, the liquid injection cup is driven to move along the liquid injection needle until the liquid inlet of the liquid injection needle is positioned below the liquid level of the electrolyte, and the electrolyte can enter the liquid injection needle and finally be injected into the battery through the liquid outlet. The liquid injection amount of the electrolyte can be accurately controlled through the moving distance of the liquid injection cup, and once the liquid level of the electrolyte is lower than the liquid inlet, the electrolyte cannot enter the liquid injection needle. Therefore, only the moving distance of the liquid injection cup is required to be controlled, so that the liquid injection device and the liquid injection equipment can simplify the structure on the premise of realizing accurate control of the liquid injection amount.

Inventors

  • Request for anonymity
  • Request for anonymity
  • Request for anonymity

Assignees

  • 无锡先导智能装备股份有限公司

Dates

Publication Date
20260508
Application Date
20250427

Claims (10)

  1. 1. The liquid injection device is characterized by comprising a liquid injection cup and liquid injection needles which are arranged corresponding to the liquid injection cup, wherein the liquid injection needles penetrate through the corresponding liquid injection cups, the liquid injection cups can move along the liquid injection needles, liquid inlets of the liquid injection needles are positioned in the liquid injection cups, and liquid outlets of the liquid injection needles extend out from the bottoms of the liquid injection cups.
  2. 2. The priming device of claim 1, further comprising a first mounting plate and a second mounting plate, wherein the second mounting plate is slidably mounted to the first mounting plate, wherein the priming cup is mounted to the second mounting plate, and wherein the priming needle is mounted to the first mounting plate.
  3. 3. The priming device of claim 2, wherein the priming cup and the priming needle are each provided with a plurality of priming needles, and the liquid injection needles and the liquid injection cups are respectively arranged on the first mounting plate and the second mounting plate in an array mode.
  4. 4. The priming device of claim 3, wherein a plurality of receiving holes are formed in the second mounting plate, each of the priming cups being inserted into the receiving holes.
  5. 5. The priming device of claim 2, wherein a surface of the first mounting plate is provided with a plurality of guide rods, and the second mounting plate is slidably sleeved on the guide rods.
  6. 6. The priming device of claim 1, wherein a bottom of the priming cup is formed with a strip-shaped through channel through which the priming needle passes.
  7. 7. The priming device of claim 6, wherein a sealing ring is disposed on an inner wall of the through channel, the priming needle abutting the sealing ring.
  8. 8. The priming device of claim 1, wherein the priming needle is a hollow structure with two open ends, and the inlet and the outlet are located at two end faces of the priming needle, respectively.
  9. 9. The priming device of claim 8, wherein an outer diameter of the priming needle proximate the one end of the outlet decreases gradually in a direction toward the outlet.
  10. 10. A liquid injection apparatus comprising a liquid injection tray and a liquid injection device as claimed in any one of claims 1 to 9.

Description

Liquid injection device and liquid injection equipment Technical Field The utility model relates to the technical field of lithium battery equipment, in particular to a liquid injection device and liquid injection equipment. Background The injection is an important procedure in the production process of lithium batteries, and the electrolyte needs to be quantitatively injected into the shell and infiltrate the battery cells. At present, the common liquid injection device is to inject electrolyte into the liquid injection cup first, and then the electrolyte in the liquid injection cup is hydraulically pressed into the shell through the piston rod. In order to precisely control the injection quantity, the stroke of the piston rods must be precisely controlled, which requires a corresponding control module for each piston rod. Moreover, due to the influence of gravity, inertia and other factors, the piston still has the possibility of leaking after stopping moving, so that the liquid injection process needs to be controlled. This results in a complicated structure of the priming device. Disclosure of utility model In view of the above, it is necessary to provide a liquid injection device and a liquid injection apparatus which have a simple structure and can precisely control the liquid injection amount. The liquid injection device comprises a liquid injection cup and liquid injection needles which are arranged corresponding to the liquid injection cup, wherein the liquid injection needles penetrate through the corresponding liquid injection cups, the liquid injection cups can move along the liquid injection needles, liquid inlets of the liquid injection needles are positioned in the liquid injection cups, and liquid outlets of the liquid injection needles extend out from the bottoms of the liquid injection cups. In one embodiment, the device further comprises a first mounting plate and a second mounting plate, wherein the second mounting plate is slidably mounted on the first mounting plate, the liquid filling cup is mounted on the second mounting plate, and the liquid filling needle is mounted on the first mounting plate. In one embodiment, the liquid injection cup and the liquid injection needle are provided in plurality, and the liquid injection needles and the liquid injection cups are arranged in an array on the first mounting plate and the second mounting plate respectively. In one embodiment, the second mounting plate is formed with a plurality of accommodating holes, and each of the liquid injection cups is inserted into the accommodating hole. In one embodiment, the surface of the first mounting plate is provided with a plurality of guide rods, and the second mounting plate is slidably sleeved on the guide rods. In one embodiment, a strip-shaped through channel is formed at the bottom of the liquid injection cup, and the liquid injection needle passes through the through channel. In one embodiment, a sealing ring is arranged on the inner wall of the through channel, and the liquid injection needle is abutted with the sealing ring. In one embodiment, the liquid injection needle is a hollow structure with two open ends, and the liquid inlet and the liquid outlet are respectively positioned on two end surfaces of the liquid injection needle. In one embodiment, the outer diameter of the liquid injection needle near one end of the liquid outlet gradually decreases along the direction pointing to the liquid outlet. A priming apparatus comprising a priming tray and a priming device as in any one of the preceding embodiments. The electrolyte is injected into the electrolyte injection device and the electrolyte injection equipment in advance in the electrolyte injection cup. When the liquid is injected, the battery is firstly fed to the liquid injection tray, the liquid injection tray drives the battery to the lower part of the liquid injection device, and the liquid outlet of the liquid injection needle is aligned with the liquid injection hole of the battery through positioning. Then, the liquid injection cup is driven to move along the liquid injection needle until the liquid inlet of the liquid injection needle is positioned below the liquid level of the electrolyte, and the electrolyte can enter the liquid injection needle and finally be injected into the battery through the liquid outlet. The liquid injection amount of the electrolyte can be accurately controlled through the moving distance of the liquid injection cup, and once the liquid level of the electrolyte is lower than the liquid inlet, the electrolyte cannot enter the liquid injection needle. Therefore, only the moving distance of the liquid injection cup is required to be controlled, so that the liquid injection device and the liquid injection equipment can simplify the structure on the premise of realizing accurate control of the liquid injection amount. Drawings In order to more clearly illustrate the embodiments of the application or the tec