Electrolyte injection needle
By introducing multiple sets of auxiliary injection channels and round table structures into the lithium battery injection needle, the splash and drop problems caused by the cylindrical injection needle are solved, and the injection accuracy and equipment stability are improved.
Patent Information
- Application Number
- CN202421039076.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-13
- Publication Date
- 2025-01-17
- Estimated Expiration
- 2034-05-13
AI Technical Summary
In the existing lithium battery injection process, the diameter of the infusion channel of the cylindrical injection needle is consistent, causing electrolyte to splash, corrode the shell and droplet crystallization, affecting the yield and equipment efficiency.
An electrolyte injection needle was designed, which was connected to the injection channel using multiple sets of auxiliary injection channels. The auxiliary injection port was close to the main injection port and was arranged at intervals along the circumferential direction to form a dispersed liquid discharge effect and injected liquid in the main injection port. A circular table structure is provided at the mouth to reduce the diameter and tilt the auxiliary liquid injection port to avoid splashing.
It effectively reduces the phenomenon of electrolyte splashing, avoids impact on the battery case wall or battery cell, and improves the injection accuracy and long-term operation stability of the equipment.
Smart Images
Figure CN222365708U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of battery liquid injection equipment, in particular to an electrolyte liquid injection needle. Background Art
[0002] In the existing lithium battery injection process, the injection needle generally adopts a cylindrical needle, that is, the diameter of the infusion channel inside the injection needle is consistent at all places. When in use, the tail of the needle is connected to the hose for inputting electrolyte, and the head of the needle is connected to the battery cell. The electrolyte flows from the tail of the needle to the infusion channel inside the needle, and finally outputs from the head of the needle to the battery. The structure of this type of needle is simple and easy to process. However, since the diameter of the infusion channel of the cylindrical needle is consistent at all places, the infusion speed is fast, and the single-port impact pressure is too large, the electrolyte is easy to splash outside the battery after colliding with the shell wall of the electrolyte cup or the battery cell, resulting in inaccurate injection volume, and will corrode the battery shell, reduce the yield, and the electrolyte crystallization caused by dripping will also affect the yield, thereby affecting the equipment efficiency. The crystallization accumulated over a long period of time will also affect the normal operation of the hardware of the injection equipment. Utility Model Content
[0003] In order to overcome the above shortcomings, the purpose of the present invention is to provide an electrolyte injection needle to solve the problems caused by the above background technology.
[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is an electrolyte injection needle, comprising:
[0005] The needle body extends axially and includes a liquid inlet and a main liquid injection port. The liquid inlet is arranged at the top of the needle body and is used to connect with an external electrolyte infusion pipeline. The main liquid injection port is arranged at the bottom of the needle body and is used to discharge the electrolyte.
[0006] The needle body also includes an injection channel and multiple groups of auxiliary injection channels. The injection channel extends along the axial direction, and the two ends are respectively connected to the liquid inlet and the main injection port. The multiple groups of auxiliary injection channels are arranged at one end of the needle body close to the main injection port, and are arranged at intervals along the circumferential direction, and the circumferential direction surrounds the axial direction. Each group of auxiliary injection channels is connected to the injection channel.
[0007] The electrolyte injection needle provided by the utility model is provided with a plurality of auxiliary injection channels on the basis of the original liquid inlet-injection port, which is a single injection channel. The plurality of auxiliary injection channels are arranged close to the main injection port and enter the electrolyte cup together with the main injection port, so that the electrolyte is dispersedly discharged from the plurality of channels, thereby effectively solving the splashing problem caused by excessive impact pressure of the single port.
[0008] In some embodiments, the needle body is a truncated cone structure at the main injection port. The truncated cone structure and the injection channels in its inner part are arranged to decrease in size in a direction close to the main injection port. The multiple groups of auxiliary injection channels are located above the truncated cone structure.
[0009] By adopting the above technical solution, the diameter of the main liquid injection port is successively reduced along the axial direction, and the small-diameter liquid injection port can effectively reduce the occurrence of dripping.
[0010] In some embodiments, each group of the auxiliary liquid injection channels includes a plurality of auxiliary liquid injection ports. The plurality of auxiliary liquid injection ports are spaced apart along the axial direction, and one end of each of the auxiliary liquid injection ports is in communication with the liquid injection channel.
[0011] By adopting the above technical solution, a plurality of auxiliary liquid injection ports form a plurality of branches of the liquid injection channel, so that the electrolyte can be discharged in a dispersed manner when the electrolyte is injected.
[0012] In some embodiments, the plurality of auxiliary liquid injection ports are all arranged to be inclined away from the liquid injection channel. The other end of each auxiliary liquid injection port is arranged close to the main liquid injection port. The angle between the inclined direction of each auxiliary liquid injection port and the axial direction is 45°.
[0013] By adopting the above technical solution, the auxiliary liquid injection port is tilted to prevent the electrolyte from colliding with the shell wall or the battery cell, thereby preventing liquid splashing.
[0014] In some embodiments, the center of the injection port, the center of the liquid inlet, and the central axis of the injection channel are all on the same straight line.
[0015] By adopting the above technical solution, the injection port, the liquid inlet and the injection channel are coaxially arranged to ensure the accuracy of the main injection port.
[0016] In some embodiments, the needle body is made of corrosion-resistant stainless steel.
[0017] By adopting the above technical solution, the anti-corrosion stainless steel generally has the property of being rust-proof and resistant to corrosion by chemical corrosive media (acid, alkali, salt and other chemical corrosion), and is therefore suitable for use in battery filling equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a three-dimensional diagram of an electrolyte injection needle according to an embodiment of the utility model;
[0019] Figure 2 It is a cross-sectional view of an embodiment of an electrolyte injection needle of the utility model;
[0020] In the figure:
[0021] 1-needle body, 2-liquid inlet; 3-main liquid injection port; 4-liquid injection channel; 5-auxiliary liquid injection channel; 50-auxiliary liquid injection port; 6-truncated cone structure. DETAILED DESCRIPTION
[0022] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.
[0023] refer to Figure 1 and Figure 2 , Figure 1 A stereoscopic diagram of an electrolyte injection needle provided by an embodiment of the utility model is shown; Figure 2 A cross-sectional view of an electrolyte injection needle provided in an embodiment of the utility model is shown.
[0024] like Figure 1 and Figure 2 As shown in the figure, the technical solution provided by the present application is shown: an electrolyte injection needle, which includes a needle body 1, wherein the needle body 1 is axially ( Figure 1 The needle body 1 is provided with a liquid inlet 2 and a main liquid injection port 3. The liquid inlet 2 is provided at the top of the needle body 1 for connecting with an external electrolyte infusion pipeline. The main liquid injection port 3 is provided at the bottom of the needle body 1 for discharging electrolyte. The needle body 1 also includes a liquid injection channel 4 and a plurality of auxiliary liquid injection channels 5. The liquid injection channel 4 extends along the axial direction, and the two ends are connected to the liquid inlet 2 and the main liquid injection port 3 respectively. The plurality of auxiliary liquid injection channels 5 are provided at one end of the needle body 1 close to the main liquid injection port 3, and are arranged along the circumferential direction ( Figure 2 Each group of auxiliary injection channels 5 is connected to the injection channel 4.
[0025] The electrolyte injection needle provided in the present application is provided with a plurality of groups of auxiliary injection channels 5 on the basis of the original liquid inlet 2 to injection port, which is a single injection channel 4. The plurality of groups of auxiliary injection channels 5 are arranged near the main injection port 3, and enter the electrolyte cup together with the main injection port 3, so as to disperse and discharge the electrolyte from a plurality of channels, thereby effectively solving the splashing problem caused by excessive impact pressure of a single port.
[0026] Specifically, in the present embodiment, three groups of auxiliary injection channels 5 are provided, but there is no limitation on the number of auxiliary injection channels 5. As long as the structural strength of the electrolyte injection needles at the multiple groups of auxiliary injection channels 5 is ensured, for example, four groups, six groups, etc. can be applied to the present solution.
[0027] In some embodiments, reference Figure 1 and Figure 2The needle body 1 is a truncated cone structure 6 at the main injection port 3. The truncated cone structure 6 and the injection channel 4 inside it are successively reduced in size toward the main injection port 3. A plurality of auxiliary injection channels 5 are located above the truncated cone structure 6.
[0028] Exemplarily, the diameter of the main liquid injection port 3 is arranged to decrease successively along the axial direction, and the small-diameter liquid injection port can effectively reduce the occurrence of dripping.
[0029] In some embodiments, reference Figure 1 and Figure 2 Each group of auxiliary liquid injection channels 5 includes a plurality of auxiliary liquid injection ports 50. The plurality of auxiliary liquid injection ports 50 are arranged at intervals along the axial direction, and one end of each auxiliary liquid injection port 50 is connected to the liquid injection channel 4.
[0030] Exemplarily, the plurality of auxiliary injection ports 50 form a plurality of branches of the injection channel 4, so that the electrolyte can be discharged in a dispersed manner when the electrolyte is injected. In addition, the number of the auxiliary injection ports 50 in this embodiment is three, but the number of the auxiliary injection ports 50 is not limited, and any auxiliary injection ports 50 that can meet the auxiliary discharge of the electrolyte can be applied to this solution.
[0031] In some embodiments, reference Figure 1 and Figure 2 The plurality of auxiliary liquid injection ports 50 are all arranged obliquely in a direction away from the liquid injection channel 4. The other end of each auxiliary liquid injection port 50 is arranged close to the main liquid injection port 3.
[0032] The included angle between the inclined direction of each auxiliary liquid injection port 50 and the axial direction is 45°.
[0033] For example, Figure 2 As shown in ∠α, each auxiliary liquid injection port 50 is tilted downward, and the angle between the tilting direction and the axial direction is 45, so as to prevent the electrolyte from colliding with the shell wall or the battery cell and causing liquid splashing.
[0034] In some embodiments, reference Figure 1 and Figure 2 , the center of the liquid injection port, the center of the liquid inlet 2 and the central axis of the liquid injection channel 4 are all on the same straight line.
[0035] Exemplarily, the liquid injection port, the liquid inlet 2 and the liquid injection channel 4 are coaxially arranged to ensure the accuracy of the main liquid injection port 3.
[0036] In some embodiments, the needle body 1 is made of corrosion-resistant stainless steel.
[0037] For example, corrosion-resistant stainless steel is generally rust-proof and resistant to corrosion by chemically corrosive media (acids, alkalis, salts, etc.), and is therefore suitable for use in battery filling equipment.
[0038] The above implementation modes are only for illustrating the technical concept and features of the utility model, and their purpose is to allow people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.
Claims
1. An electrolyte injection needle, characterized in that: include: The needle body extends along the axial direction and includes a liquid inlet and a main liquid injection port; the liquid inlet is arranged at the top of the needle body and is used to connect with an external electrolyte infusion pipeline; the main liquid injection port is arranged at the bottom of the needle body and is used to discharge the electrolyte; The needle body also includes an injection channel and multiple groups of auxiliary injection channels; the injection channel extends along the axial direction, and its two ends are respectively connected to the liquid inlet and the main injection port; the multiple groups of auxiliary injection channels are arranged at one end of the needle body close to the main injection port, and are arranged at intervals along the circumferential direction, and the circumference surrounds the axial direction; each group of auxiliary injection channels is connected to the injection channel.
2. The electrolyte injection needle according to claim 1, characterized in that: The needle body is a truncated cone structure at the main injection port; the truncated cone structure and the injection channel inside it are successively reduced in size in the direction close to the main injection port; the multiple groups of auxiliary injection channels are located above the truncated cone structure.
3. The electrolyte injection needle according to claim 1, characterized in that: Each group of the auxiliary liquid injection channels comprises a plurality of auxiliary liquid injection ports; the plurality of auxiliary liquid injection ports are arranged at intervals along the axial direction, and one end of each of the auxiliary liquid injection ports is communicated with the liquid injection channel.
4. The electrolyte injection needle according to claim 3, characterized in that: The plurality of auxiliary liquid injection ports are all arranged to be inclined in a direction away from the liquid injection channel; and the other end of each of the auxiliary liquid injection ports is arranged close to the main liquid injection port.
5. The electrolyte injection needle according to claim 4, characterized in that: The angle between the inclined direction of each auxiliary liquid injection port and the axial direction is 45°.
6. The electrolyte injection needle according to claim 1, characterized in that: The center of the liquid injection port, the center of the liquid inlet, and the central axis of the liquid injection channel are all on the same straight line.
7. The electrolyte injection needle according to claim 1, characterized in that: The needle body is made of corrosion-resistant stainless steel.