Lithium ion power battery liquid injection tool

Abstract

The utility model discloses a liquid injection tool for a lithium ion power battery. The liquid injection tool comprises a base plate, a supporting plate and a push plate supporting plate, wherein the supporting plate and the push plate supporting plate are arranged on the base plate; at least one of the supporting plate and the push plate supporting plate is arranged on the base plate in a sliding mode. When the liquid injection tool for the lithium ion power battery injects liquid, certain pressure constraint can be carried out on a battery cell to prevent the battery cell from bulging in the liquid injection process.

Description

Technical Field

[0001] The utility model belongs to lithium ion power battery processing equipment, and more specifically, relates to a lithium ion power battery liquid injection tool. Background Art

[0002] In the field of power lithium-ion battery manufacturing, small samples need to be made during the initial design verification process. Due to the need to reduce costs, a large amount of equipment resources will not be invested in the early stage of small sample production, and some processes are often completed manually. The injection process is the link with the highest degree of manual participation. However, due to problems such as unstable operators and inability to measure force, the actual injection effect of the battery cell is different, and the swelling of the battery cell shell cannot be controlled. In addition, after the injection cell swells, the bulging area accommodates more electrolyte, the electrode infiltration state will be different, and the redistribution of the electrolyte in the later stage will also be different. As a result, during the charging and discharging process of the lithium battery, there will be different lithium ion migration speeds and uneven current density, which will have a certain impact on the performance of the battery cell.

[0003] Patent application CN 107394106 A discloses a lithium-ion power battery injection device, including a fixing seat, a positioning block is arranged in the fixing seat, and the battery is placed in the fixing seat and located between the positioning blocks. This structure is only applicable to lithium-ion power batteries with fixed shapes. During the initial design scheme verification process, the shape of the lithium-ion power battery is prone to change, and this device is no longer applicable or needs to be modified. Summary of the invention

[0004] In order to solve the above problems, the utility model provides a lithium-ion power battery injection tool to solve the problem that the expansion of the battery cell shell of the lithium-ion power battery injection tool cannot be controlled.

[0005] The utility model adopts the following technical solutions:

[0006] A lithium-ion power battery injection tool, comprising:

[0007] A pad, a support plate and a push plate support plate provided on the pad;

[0008] At least one of the support plate and the push plate support plate is slidably disposed on the pad.

[0009] Furthermore, the lithium-ion power battery injection tooling also includes:

[0010] A propulsion mechanism connected to and capable of propulsing at least one of the support plate and the push plate support plate to drive the support plate and the push plate support plate to move closer to or farther away from each other;

[0011] The locking mechanism is connected to the propulsion mechanism and is used to lock or release the propulsion mechanism.

[0012] Furthermore, the propulsion mechanism comprises:

[0013] A fixing seat, arranged on the pad;

[0014] A push rod, slidably disposed in the fixing seat and connected to the support plate or the push plate support plate;

[0015] The sleeve is threadedly connected with the push rod. After the sleeve rotates, it drives the push rod to drive the support plate or the push plate support plate to move.

[0016] Furthermore, the locking mechanism comprises:

[0017] Two locking members are respectively arranged on the backing plate, the two locking members jointly form a through hole, and the push rod passes through the through hole;

[0018] The fixed handle is passed through the two locking members. After the fixed handle is rotated, the two locking members can be driven to approach each other so that the perforated hole wall clamps the push rod, thereby locking the push rod.

[0019] Furthermore, the propulsion mechanism further comprises:

[0020] Two guide shafts, one end of each guide shaft is fixed to the fixing seat, and the other end is slidably penetrated through the support plate or the push plate support plate.

[0021] Furthermore, the lithium-ion power battery injection tool further includes an injection mechanism, and the injection mechanism includes:

[0022] a baffle, arranged on the pad;

[0023] A liquid injection cylinder fixing seat, arranged on the baffle;

[0024] The liquid injection cylinder is detachably arranged on the liquid injection cylinder fixing seat and is used for injecting liquid into the lithium-ion power battery. The liquid injection cylinder is provided with scale lines.

[0025] Furthermore, the pad is provided with a slot for mounting a pole of a lithium-ion power battery.

[0026] Furthermore, the lithium-ion power battery injection tooling also includes:

[0027] A plurality of partitions are used to be arranged on the pad at intervals with a plurality of lithium-ion power batteries. Beneficial Effects

[0028] Compared with the prior art, the beneficial effects of the utility model are:

[0029] The battery cell is clamped by the cooperation of the support plate and the push plate support plate, which significantly improves the injection efficiency compared to manual injection with a syringe, while ensuring that the battery cell shell will not swell due to manual positive pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the structure of the lithium-ion power battery filling tooling.

[0031] In the figure:

[0032] 1. Push plate support plate; 2. Pad; 3. Bottom plate; 4. Partition; 5. Reinforcement ribs; 6. Schematic diagram of battery cells; 7. Support plate; 8. Liquid injection cylinder; 9. Liquid injection cylinder fixing seat; 10. Baffle; 11. Guide shaft; 12. Locking mechanism; 13. Fixed handle; 14. Sleeve interface; 15. Push handle. DETAILED DESCRIPTION

[0033] The utility model is further described below in conjunction with specific embodiments and drawings.

[0034] See also Figure 1 The present utility model provides a lithium-ion power battery injection tool, including:

[0035] A backing plate 2, a support plate 7 and a push plate support plate 1 arranged on the backing plate 2;

[0036] At least one of the support plate 7 and the push plate support plate 1 is slidably disposed on the pad 2 .

[0037] The backing plate 2 is used to carry the lithium-ion power battery.

[0038] In the illustrated embodiment, the support plate 7 is fixed to the pad 2 and is used to abut against one side of the lithium-ion power battery; the push plate support plate 1 is slidably disposed on the pad 2 to clamp or release the lithium-ion power battery.

[0039] In the illustrated embodiment, for the convenience of processing, the lithium-ion power battery injection tool further includes a bottom plate 3. The backing plate 2 is mounted on the bottom plate 3. It can be understood that in other embodiments, the bottom plate 3 can be omitted.

[0040] In the illustrated embodiment, reinforcing ribs 5 are also fixed to the outer side of the support plate 7 to strengthen the support.

[0041] In the illustrated embodiment, the lithium-ion power battery injection tool further includes a propulsion mechanism. The propulsion mechanism is connected to the push plate support plate 1 to drive the push plate support plate 1 and the support plate 7 to clamp the lithium-ion power battery;

[0042] The locking mechanism 12 is connected to the propulsion mechanism and is used to lock or release the propulsion mechanism.

[0043] The liquid injection mechanism is used to inject liquid into the lithium-ion power battery.

[0044] Furthermore, the propulsion mechanism comprises:

[0045] A fixing seat, arranged on the pad 2;

[0046] A push rod, slidably disposed in the fixing seat and connected to the push plate support plate 1;

[0047] The sleeve is threadedly connected to the push rod. When the sleeve rotates, it drives the push rod to drive the push plate support plate 1 to move.

[0048] Furthermore, the locking mechanism 12 includes:

[0049] Two locking members are respectively arranged on the backing plate 2, and the two locking members jointly form a through hole, and the push rod passes through the through hole;

[0050] The fixed handle 13 is passed through the two locking members. After the fixed handle 13 is rotated, the two locking members can be driven to approach each other so that the perforated hole wall tightens the push rod, thereby locking the push rod and the push plate support plate 1.

[0051] Furthermore, the propulsion mechanism further comprises:

[0052] Two guide shafts 11, one end of each guide shaft 11 is fixed to the fixing seat, and the other end is slidably arranged in the push plate support plate 1.

[0053] Furthermore, the liquid injection mechanism comprises:

[0054] A baffle 10, provided on the backing plate 2;

[0055] A liquid injection cylinder fixing seat 9, provided on the baffle 10;

[0056] The liquid injection cylinder 8 is detachably mounted on the liquid injection cylinder fixing seat 9 and is used for injecting liquid into the lithium-ion power battery. The liquid injection cylinder 8 is provided with scale lines.

[0057] Furthermore, the pad 2 is provided with a slot for mounting a pole of a lithium-ion power battery.

[0058] Furthermore, the lithium-ion power battery injection tooling also includes:

[0059] A plurality of partitions 4 are used to be arranged on the backing plate 2 to be spaced apart from a plurality of lithium-ion power batteries.

[0060] When the lithium-ion power battery filling tool is in use:

[0061] 1. Place the battery cell 6 on the backing plate 2, with the pole stuck in the slot of the backing plate 2 to prevent the battery cell from shaking left and right.

[0062] 2. Place the partition 4 close to the large surface of the schematic battery cell 6 to ensure that the large surface of the battery cell is flat.

[0063] 3. Arrange the cells by repeating methods 1 and 2 according to the number of cells injected at a time.

[0064] 4. Turn the push handle 15 clockwise to push the push plate support plate 1 to pre-tighten the battery cell. After the battery cell and the partition 4 are tightly fitted, pull the fixed handle 13 to lock the locking mechanism 12 to prevent the battery cell from moving during subsequent operations. You can also put a torque wrench on the sleeve interface 14 and use a fixed torque to pre-tighten the battery cell.

[0065] 5. There is a slide groove on the back of the baffle 10, which can fix the injection cylinder fixing seat 9. The injection cylinder 8 is put on the injection cylinder fixing seat 9, and then according to the position of the battery cell in 3, the injection port of the injection cylinder 8 is inserted into the injection port of the battery cell, and then the injection cylinder fixing seat 9 is fixed.

[0066] 6. There are scales on the injection cylinder 8. The electrolyte can be directly introduced according to the scale lines of the injection cylinder 8 according to the required injection amount of the battery cell and the density of the electrolyte. Alternatively, the electrolyte with a fixed weight weighed by an electronic scale can be poured into the injection cylinder 8.

[0067] 7. Place the whole of 6 in a vacuum oven and set a vacuum cycle. When vacuuming, the air inside the battery cell will escape, and then the electrolyte in the injection cylinder 8 will be automatically filled to speed up the injection speed. Through a fixed vacuum cycle, the battery cell shell and its internal pole piece and diaphragm can breathe to avoid irreversible deformation of the shell due to long-term stress. The breathing of the pole piece and diaphragm helps to remove bubbles, thereby better ensuring that the pole piece and diaphragm fit closely, which is conducive to the insertion of lithium in the negative electrode.

[0068] The examples described in the present invention are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made to the technical solutions of the present invention by engineers and technicians in this field shall fall within the protection scope of the present invention.

Claims

1. A lithium-ion power battery injection tool, characterized in that: include: A pad, a support plate and a push plate support plate provided on the pad; At least one of the support plate and the push plate support plate is slidably disposed on the pad.

2. The lithium-ion power battery injection tooling according to claim 1, characterized in that: The lithium-ion power battery injection tooling also includes: A propulsion mechanism connected to and capable of propulsing at least one of the support plate and the push plate support plate to drive the support plate and the push plate support plate to move closer to or farther away from each other; The locking mechanism is connected to the propulsion mechanism and is used to lock or release the propulsion mechanism.

3. The lithium-ion power battery injection tooling according to claim 2, characterized in that: The propulsion mechanism comprises: A fixing seat, arranged on the pad; A push rod, slidably disposed in the fixing seat and connected to the support plate or the push plate support plate; The sleeve is threadedly connected with the push rod. After the sleeve rotates, it drives the push rod to drive the support plate or the push plate support plate to move.

4. The lithium-ion power battery injection tooling according to claim 3, characterized in that: The locking mechanism comprises: Two locking members are respectively arranged on the backing plate, the two locking members jointly form a through hole, and the push rod passes through the through hole; The fixed handle is passed through the two locking members. After the fixed handle is rotated, the two locking members can be driven to approach each other so that the perforated hole wall clamps the push rod, thereby locking the push rod.

5. The lithium-ion power battery injection tooling according to claim 4, characterized in that: The propulsion mechanism further comprises: Two guide shafts, one end of each guide shaft is fixed to the fixing seat, and the other end is slidably arranged in the support plate or the push plate support plate.

6. The lithium-ion power battery injection tooling according to claim 1, characterized in that: The lithium-ion power battery injection tool further includes an injection mechanism, which includes: a baffle, arranged on the pad; A liquid injection cylinder fixing seat, arranged on the baffle; The liquid injection cylinder is detachably arranged on the liquid injection cylinder fixing seat and is used for injecting liquid into the lithium-ion power battery. The liquid injection cylinder is provided with scale lines.

7. The lithium-ion power battery injection tooling according to claim 1, characterized in that: The backing plate is provided with slots for mounting the poles of the lithium-ion power battery.

8. The lithium-ion power battery injection tooling according to claim 1, characterized in that: The lithium-ion power battery injection tooling also includes: A plurality of partitions are used to be arranged on the pad at intervals with a plurality of lithium-ion power batteries.

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