Electrolyte injector for soft package battery

Abstract

The electrolyte injector comprises a needle cylinder and a push rod, one end of the push rod is provided with a piston, the needle cylinder is provided with a handle, the handle is provided with a limiting mechanism, the limiting mechanism comprises a limiter and a limiting rod, the limiting rod is connected with the limiter in a sliding mode, and the limiting rod is connected with the limiting rod in a sliding mode. The limiting device is used for fixing or releasing the limiting rod, the limiting rod is parallel to the push rod, one end of the limiting rod is inserted into the needle cylinder, and when the limiting rod is fixed by the limiting device, the end, inserted into the needle cylinder, of the limiting rod can limit the suction length of the piston. The suction length of the piston can be changed by adjusting the length of the limiting rod extending into the needle cylinder, operation is convenient, and liquid injection efficiency can be greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid injection for soft-pack batteries, in particular to an electrolyte syringe for soft-pack batteries. Background Art

[0002] At present, the filling of soft-pack batteries mainly adopts two methods: weight method and volume method:

[0003] (1) Gravimetric method: When injecting, a certain amount of electrolyte is drawn with a syringe and weighed. If the weight is insufficient, continue to draw electrolyte. If the weight is too much, discharge some electrolyte until the electrolyte weight reaches the required injection volume. However, each injection requires multiple weighings, which is inefficient.

[0004] (2) Volumetric method: When injecting liquid, first determine the position of the syringe piston when the required injection volume is required by weighing, read the scale on the syringe or mark it manually, and then draw electrolyte to the scale / mark each time you inject liquid to determine the injection volume; however, if you visually determine that the electrolyte has been drawn to the scale / mark of the required injection volume, inconsistent visual angles will lead to inconsistent amounts of electrolyte drawn, and the error caused by human factors is relatively large.

[0005] Chinese invention patent application publication number CN111388806A discloses a set-meter syringe. This syringe employs a stopper on the syringe barrel and a metering element on the push rod. The stopper axially constrains the metering element, thereby limiting the distance the push rod can be advanced. This allows for controllable injection volume. However, the injection volume of this syringe is determined by the position of the metering element and cannot be adjusted, making it unsuitable for injecting liquid into small soft-pack battery cells used for evaluation. Utility Model Content

[0006] The purpose of this utility model is to address the defects of the existing technology and provide an electrolyte syringe for soft-pack batteries. The suction length of the piston can be changed by adjusting the length of the limit rod extending into the syringe. It is easy to operate and can greatly improve the injection efficiency.

[0007] In order to solve the above technical problems, the utility model provides an electrolyte syringe for soft-pack batteries, including a syringe and a push rod, a piston is provided at one end of the push rod, a handle is provided on the syringe, and a limiting mechanism is provided on the handle, the limiting mechanism includes a limiter and a limiting rod, the limiting rod is slidably connected to the limiter, the limiter is used to fix or release the limiting rod, the limiting rod is arranged parallel to the push rod, one end of the limiting rod is inserted into the syringe, and when the limiter fixes the limiting rod, the limiting rod is inserted into one end of the syringe to limit the suction length of the piston.

[0008] Furthermore, the limiter includes a limiting seat, a sliding hole and a limiting hole are opened on the limiting seat, the sliding hole is opened parallel to the axial direction of the push rod, the limiting hole is perpendicular to the sliding hole and connected to the sliding hole, the limiting rod is slidably set in the sliding hole, and a fixing rod is set in the limiting hole, and the fixing rod is used to fix the limiting rod.

[0009] In some embodiments, the fixing rod is threadedly connected to the limiting hole, and one end of the fixing rod abuts against the limiting rod, thereby fixing the limiting rod.

[0010] In some embodiments, the fixing rod is threadedly connected to the limiting hole, and the limiting rod has multiple quantitative holes or quantitative grooves opened along the axial direction. One end of the limiting rod is inserted into the quantitative hole or quantitative groove to fix the limiting rod.

[0011] In some embodiments, the fixing rod is slidably connected to the limiting hole, and the limiting rod has a plurality of quantitative holes or quantitative grooves opened along the axial direction. One end of the limiting rod is inserted into the quantitative hole or quantitative groove to fix the limiting rod.

[0012] Furthermore, a limiting plate is provided at one end of the limiting rod inserted into the syringe.

[0013] Furthermore, the limiting plate is polygonal, circular or ring-shaped.

[0014] Furthermore, the limiting plate is annular, and the push rod passes through the limiting plate.

[0015] Furthermore, a buckle is provided on the limiting seat, and the limiting seat is detachably connected to the handle via the buckle.

[0016] Furthermore, a scale is provided on the syringe.

[0017] The beneficial effects of the utility model are:

[0018] 1. This utility model incorporates a limiter mechanism on the syringe handle. The limiter rod of the limiter mechanism is secured by a limiter, thereby controlling the piston's pumping length. This ensures that the amount of liquid pumped each time is equal, ensuring that each soft-pack battery receives an equal amount of electrolyte. Furthermore, the piston's pumping length can be varied by adjusting the length of the limiter rod extending into the syringe. This utility model is easy to operate and significantly improves injection efficiency.

[0019] 2. The present invention uses a sliding hole and a limiting hole that are perpendicular to each other and connected, and can fix the limiting rod by inserting a fixing rod into the limiting hole.

[0020] 3. The fixing rod of the utility model can be fixed to the limiting rod in a variety of ways: (1) the fixing rod is threadedly connected to the limiting hole, and the tightening force of the thread is used to tightly press one end of the fixing rod against the limiting rod, thereby fixing the limiting rod. In this way, the suction length of the piston can be continuously and linearly changed to meet the requirements of various electrolyte amounts; (2) by opening a plurality of quantitative holes on the limiting rod, the fixing rod is inserted into the quantitative holes to fix the limiting rod, but this method will cause the suction length of the piston to be related to the arrangement position of the quantitative holes.

[0021] 4. A limiting plate is provided at one end of the limiting rod of the present invention. The limiting plate can be provided in an annular shape. The piston is limited by the annular limiting plate, which can ensure the limiting effect of the piston.

[0022] 5. The limiting seat of the utility model is connected to the handle of the syringe by a buckle, so that the limiting mechanism can be matched with any syringe without changing the structure of the existing syringe. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of the present utility model.

[0024] Figure numerals: 1-limiting rod; 2-fixing rod; 3-buckle; 4-limiting plate; 5-needle; 6-piston; 7-syringe; 8-needle handle; 9-limiting seat; 10-push rod. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0026] Example 1

[0027] like Figure 1 As shown, this embodiment is an electrolyte syringe for soft-pack batteries, comprising a syringe 7 and a push rod 10. A piston 6 is provided at one end of the push rod 10, and two symmetrically arranged needle handles 8 are provided at one end of the syringe 7. The needle handles 8 and the syringe 7 are an integral structure. A scale is provided on the outer wall of the syringe 7, and a needle 5 is provided at the other end of the syringe 7.

[0028] A limiting mechanism is provided on the needle handle 8, and the limiting mechanism includes a limiter and a limiting rod 1. The limiter includes a limiting seat 9. A sliding hole and a limiting hole are provided on the limiting seat 9. The sliding hole is provided parallel to the axial direction of the push rod 10, and the limiting hole is perpendicular to the sliding hole and is connected to the sliding hole. The limiting rod 1 is slidably provided in the sliding hole, and the sliding hole is located within the axial projection range of the syringe 7, so that the limiting rod 1 can be inserted into the syringe 7. A limiting plate 4 is provided at one end of the limiting rod 1 inserted into the syringe 7. The limiting plate 4 is polygonal, circular or annular. In this embodiment, the limiting plate 4 is circular.

[0029] A fixing rod 2 is provided in the limiting hole and is used to fix the limiting rod 1. In this embodiment, the fixing rod 2 is threadedly connected to the limiting hole. By rotating the fixing rod 2, one end of the fixing rod 2 abuts against the limiting rod 1, thereby fixing the limiting rod 1. As a result, when the piston 6 moves to a certain height, it will be blocked by the limiting plate 4, thereby limiting the suction length of the piston 6.

[0030] In this embodiment, a buckle 3 is provided on the limiting seat 9. The limiting seat 9 is detachably connected to the needle handle 8 via the buckle 3, allowing the limiting mechanism to be compatible with any syringe without modifying the structure of existing syringes. In this embodiment, the buckle 3 is a U-shaped buckle 3 with an opening on one side. The needle handle 8 can be inserted into the U-shaped buckle 3. The opening of the U-shaped buckle 3 is then connected using a bolt or other means to secure the buckle 3 to the needle handle 8.

[0031] The method of using the electrolyte syringe for soft pack batteries is as follows:

[0032] When filling the soft-pack battery, first confirm that the limit rod 1 can move up and down freely; rinse the syringe, return the syringe weight to zero, then pull the push rod 10 to absorb the electrolyte, and the limit rod 1 will move with the movement of the piston 6. Confirm the required injection volume by weighing, keep the piston 6 stationary, and keep the syringe placed vertically. At this time, the limit plate 4 is in contact with the piston 6, and the fixed rod 2 is rotated so that the fixed rod 2 tightens the limit rod 1; each subsequent time the electrolyte is absorbed, the piston 6 cannot move further upward when it moves to the limit plate 4, and the amount of electrolyte in the syringe 7 is the required injection volume.

[0033] When changing the electrolyte for different groups and needing to reconfirm the injection volume, just rotate the fixed rod 2 so that the limit rod 1 can move up and down freely, and then repeat the above steps to accurately reconfirm the injection volume.

[0034] Example 2

[0035] The only difference between Example 1 and Example 2 is the way in which fixed rod 2 secures limiting rod 1. Fixed rod 2 is threadedly connected to the limiting hole. Limiting rod 1 has multiple metering holes or metering slots defined along its axial direction. One end of limiting rod 1 is inserted into the metering holes or metering slots, thereby securing limiting rod 1.

[0036] Example 3

[0037] The only difference between Example 2 and Example 3 is the connection method between the fixing rod 2 and the limiting hole. The fixing rod 2 is slidably connected to the limiting hole. The limiting hole can be processed with a texture to create a certain amount of friction between the fixing rod 2 and the limiting hole, so that the fixing rod 2 does not easily slide in the limiting hole. The limiting rod 1 has multiple quantitative holes or quantitative grooves formed along the axial direction. One end of the limiting rod 1 is inserted into the quantitative hole or quantitative groove to fix the limiting rod 1.

[0038] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. An electrolyte syringe for soft-pack batteries, characterized by: The invention comprises a syringe (7) and a push rod (10), wherein a piston (6) is arranged at one end of the push rod (10), a needle handle (8) is arranged on the syringe (7), and a limiting mechanism is arranged on the needle handle (8), wherein the limiting mechanism comprises a limiter and a limiting rod (1), wherein the limiting rod (1) is slidably connected to the limiter, and the limiter is used to fix or release the limiting rod (1), and the limiting rod (1) is arranged parallel to the push rod (10), and one end of the limiting rod (1) is inserted into the syringe (7). When the limiter fixes the limiting rod (1), the limiting rod (1) inserted into one end of the syringe (7) can limit the suction length of the piston (6).

2. The electrolyte syringe for soft-pack batteries according to claim 1, characterized in that: The limiter comprises a limiting seat (9), a sliding hole and a limiting hole are provided on the limiting seat (9), the sliding hole is provided parallel to the axial direction of the push rod (10), the limiting hole is perpendicular to the sliding hole and communicates with the sliding hole, the limiting rod (1) is slidably arranged in the sliding hole, a fixing rod (2) is provided in the limiting hole, and the fixing rod (2) is used to fix the limiting rod (1).

3. The electrolyte syringe for soft-pack batteries according to claim 2, characterized in that: The fixing rod (2) is threadedly connected to the limiting hole, and one end of the fixing rod (2) abuts against the limiting rod (1), thereby fixing the limiting rod (1).

4. The electrolyte syringe for soft-pack batteries according to claim 2, characterized in that: The fixing rod (2) is threadedly connected to the limiting hole, and the limiting rod (1) is provided with a plurality of quantitative holes or quantitative grooves along the axial direction. One end of the limiting rod (1) is inserted into the quantitative holes or quantitative grooves, thereby fixing the limiting rod (1).

5. The electrolyte syringe for soft-pack batteries according to claim 2, characterized in that: The fixing rod (2) is slidably connected to the limiting hole, and the limiting rod (1) is provided with a plurality of quantitative holes or quantitative grooves along the axial direction, and one end of the limiting rod (1) is inserted into the quantitative holes or quantitative grooves, thereby fixing the limiting rod (1).

6. The electrolyte syringe for soft-pack batteries according to any one of claims 1 to 5, characterized in that: A limiting plate (4) is provided at one end of the limiting rod (1) inserted into the needle cylinder (7).

7. The electrolyte syringe for soft-pack batteries according to claim 6, characterized in that: The limiting plate (4) is polygonal, circular or ring-shaped.

8. The electrolyte syringe for soft-pack batteries according to claim 7, characterized in that: The limiting plate (4) is annular, and the push rod (10) passes through the limiting plate (4).

9. The electrolyte syringe for soft-pack batteries according to any one of claims 1 to 5, characterized in that: A buckle (3) is provided on the limiting seat (9), and the limiting seat (9) is detachably connected to the needle handle (8) via the buckle (3).

10. The electrolyte syringe for soft-pack batteries according to any one of claims 1 to 5, characterized in that: A scale is provided on the syringe (7).

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