Battery cell mixing device

Abstract

The utility model relates to the mixing equipment field used in secondary battery manufacturing, especially, relate to a kind of battery mixing equipment, the equipment includes sealing assembly, sealing assembly includes sealing ring fixed seat and the first sealing ring being fixed on it, the first sealing ring is sealed with sealing ring fixed seat and / or make the upper end of first sealing ring protrude from the upper end of sealing ring fixed seat and form the barrel cover sealing end for sealing with the barrel cover of mixing barrel, the lower end of first sealing ring is used to be sealed with the barrel body of mixing barrel and form barrel body sealing end, still have secondary sealing ring on the outside of first sealing ring, secondary sealing ring is used to be compressed between barrel cover and barrel body to seal with barrel cover and barrel body, the lower part of secondary sealing ring is provided with skirt that is inwardly pressed first sealing ring along sealing ring fixed seat radial when using. The utility model can avoid the failure of sealing ring under the action of the pressure that is elevated in mixing barrel, and the sealing effect between the barrel cover and barrel body of mixing barrel is optimized.

Description

Technical Field

[0001] This utility model relates to the field of mixing equipment used in the manufacture of secondary batteries, and in particular to a battery cell mixing equipment. Background Technology

[0002] In the preparation of all-solid-state battery electrodes, materials such as positive / negative electrodes and solid electrolytes need to be mixed in a mixer. During this mixing process, a certain amount of dust and toxic gases (such as hydrogen sulfide) are generated. To prevent dust leakage that could lead to powder loss from the mixing tank and affect the formulation ratio, and to avoid the spillage of dust and toxic gases that could adversely affect the surrounding environment, the sealing performance of the mixing tank must be ensured. The key to ensuring the sealing of the mixing tank lies in the seal between its lid and body.

[0003] A common sealing structure for mixing tanks is the use of a sealing ring at the mating point between the lid and the tank body. In sealed containers, sealing rings generally achieve good sealing results. However, for mixing machines used in the preparation of all-solid-state battery electrodes, ordinary sealing rings often fail to achieve the desired sealing effect. The main reason is that the mixing process generates heat from the positive / negative electrodes and solid electrolyte, causing the temperature inside the mixing tank to rise. This leads to an increase in pressure inside the tank, which in turn causes an imbalance between the inner and outer pressures of the sealing ring, resulting in seal failure. Utility Model Content

[0004] The purpose of this invention is to provide a battery cell mixing device to solve the problem of poor sealing between the lid and body of the mixing tank.

[0005] To solve the above problems, the battery cell mixing equipment of this utility model adopts the following technical solution:

[0006] A battery cell mixing device includes a sealing assembly. The sealing assembly includes an annular sealing ring fixing seat. A primary sealing ring is fixedly fitted on the sealing ring fixing seat. The primary sealing ring is in a sealing fit with the sealing ring fixing seat and / or the upper end of the primary sealing ring protrudes from the upper end of the sealing ring fixing seat to form a lid sealing end for sealing fit with the lid of a mixing tank. The lower end of the primary sealing ring is used to seal fit with the body of the mixing tank to form a body sealing end. A secondary sealing ring is also fitted outside the primary sealing ring. The secondary sealing ring is used to be pressed between the lid and the body to seal fit with the lid and the body. A skirt is provided at the lower part of the secondary sealing ring to press against the primary sealing ring radially inward along the sealing ring fixing seat during use.

[0007] Beneficial Effects: The battery cell mixing equipment of this utility model is an improved invention. Specifically, the sealing component of this utility model can be installed on the inner side of the lid of the mixing tank through the sealing ring fixing seat. When the lid is placed on the tank body, the primary sealing ring and the secondary sealing ring will seal the gap between the tank body and the lid. At the same time, the skirt of the secondary sealing ring abuts against the outer edge of the primary sealing ring, using the secondary sealing ring to reinforce the primary sealing ring, thereby assisting the primary sealing ring in resisting the air pressure inside the mixing tank. This can prevent the primary sealing ring from failing under the action of the increased air pressure inside the mixing tank, thus optimizing the sealing effect between the lid and the tank body of the mixing tank. Attached Figure Description

[0008] Figure 1 This is a schematic diagram showing the usage state of the sealing component in one embodiment of the battery cell mixing equipment of this utility model;

[0009] Figure 2 yes Figure 1 A three-dimensional view of the primary sealing ring;

[0010] Figure 3 yes Figure 2 A schematic diagram of the cross-sectional shape of the joint between the primary sealing ring and the barrel body;

[0011] Figure 4 yes Figure 1 A top view of the secondary sealing ring in the middle;

[0012] Figure 5 yes Figure 4 AA section view;

[0013] Figure 6 This is a structural diagram of the clamp;

[0014] Figure 7 yes Figure 1 A schematic diagram of the structure of the sealing ring fixing seat;

[0015] Figure 8 yes Figure 7 A schematic diagram of the cross-sectional shape of the sealing ring fixing seat.

[0016] In the diagram: 1. Sealing ring fixing seat; 101. Stepped surface; 102. Threaded connection hole; 2. Bucket lid; 3. Bucket body; 4. Primary sealing ring; 401. Base; 402. Inner sealing layer; 403. Outer sealing layer; 404. Step; 5. Secondary sealing ring; 501. Skirt; 6. Compressed air chamber; 7. Clamp; 8. Fastening screw; 9. Rubber gasket. Detailed Implementation

[0017] The features and performance of this utility model will be further described in detail below with reference to specific embodiments.

[0018] When the pressure inside a pressure vessel increases, the sealing ring at the junction of the container body and the lid often fails to seal properly. This is mainly because the sealing rings are mostly made of rubber, which has weak resistance to extrusion under high pressure fluctuations. When the pressure inside the pressure vessel increases, it may deform locally and be extruded, resulting in a failure to reliably seal with the container body. The mixing tank of the mixer used in the dry mixing system for solid-state battery electrodes is a type of pressure vessel. If a novel sealing component can be designed, using multiple sealing rings to pre-reinforce areas prone to failure, the problem of sealing failure at the junction of the lid and the container body can be solved. Based on the above inventive concept, this utility model proposes a technical solution for a battery cell mixing device.

[0019] Based on the above inventive concept, the specific implementation method of the battery cell mixing equipment of this utility model is as follows:

[0020] like Figure 1 As shown, the battery cell mixing device of this utility model includes a barrel body 3 and a barrel cover 2. A sealing assembly is provided on the barrel cover 2. The sealing assembly includes an annular sealing ring fixing seat 1. The function of the sealing ring fixing seat 1 is to serve as the mounting base for the sealing ring, supporting the sealing ring and connecting it to the barrel cover 2 of the mixing barrel. In practical applications, the shape of the sealing ring fixing seat 1 can be designed according to the shape of the port (barrel opening) of the mixing barrel body 3. For example, when the shape of the port of the mixing barrel body 3 that mates with the barrel cover 2 is circular, the sealing ring fixing seat 1 is correspondingly annular (e.g., ...). Figures 7-8 As shown, when the shape of the port on the mixing tank body 3 that mates with the tank lid 2 is rectangular, the sealing ring fixing seat 1 is correspondingly a rectangular ring. This is to ensure that the sealing ring installed on it has a shape that matches the port on the mixing tank body 3, thereby achieving a reliable seal on the port on the mixing tank body 3. Since it needs to support and even compress the sealing ring, the sealing ring fixing seat 1 should be a rigid body, such as a metal part or a resin part, which will not be elaborated here.

[0021] In the above embodiments, the sealing ring fixing seat 1 adopts a separate structure and exists independently of the bucket lid 2 of the mixing bucket. However, those skilled in the art should understand that in some other embodiments, the sealing ring fixing seat 1 can also be integrated with the bucket lid 2, that is, the sealing ring fixing seat 1 can be directly formed on the bucket lid 2.

[0022] A primary sealing ring 4 and a secondary sealing ring 5 are fixedly fitted onto the sealing ring fixing seat 1. The primary sealing ring 4 and the secondary sealing ring 5 form a two-stage seal at the mating position of the bucket lid 2 and the bucket body 3, extending from the inside to the outside of the mixing bucket (i.e., radially from the inside to the outside of the bucket body). Figure 1 , Figure 2and Figure 3 As shown, the primary sealing ring 4 is sealed and fitted with the sealing ring fixing seat 1, and / or the upper end of the primary sealing ring 4 protrudes beyond the upper end of the sealing ring fixing seat 1 to form a sealing end for sealing and fitting with the lid 2 of the mixing tank. Since the primary sealing ring 4 is fitted onto the sealing ring fixing seat 1, "the primary sealing ring 4 and the sealing ring fixing seat 1 are sealed and fitted" means that the contact position between the primary sealing ring 4 and the sealing ring fixing seat 1 is at least partially fitted. This fit blocks any annular gap that may exist between the primary sealing ring 4 and the sealing ring fixing seat 1. During use, gas and dust will not be able to leak from the position between the primary sealing ring 4 and the sealing ring fixing seat 1. When the upper end of the primary sealing ring 4 protrudes from the upper end of the sealing ring fixing seat 1, the protruding part will be squeezed by the inner side of the bucket lid 2 and tightly pressed against the inner side of the bucket lid 2, thereby achieving a sealing fit with the inner wall of the bucket lid 2. That is, the upper end of the primary sealing ring 4 forms the sealing end of the bucket lid. The sealing end of the bucket lid also blocks the annular gap outlet between the primary sealing ring 4 and the sealing ring fixing seat 1, preventing dust or gas from leaking from this position.

[0023] To achieve a seal at the mating point between the lid 2 and the body 3, it is insufficient to simply block the leakage path between the primary sealing ring 4 and the lid 2; it is also necessary to block the leakage path between the primary sealing ring 4 and the body 3. Therefore, the lower end of the primary sealing ring 4 is used to form a sealing end with the body 3 of the mixing tank. In use, the sealing end of the body 4, by mating with the inner surface and / or end face of the body 3, can block any potential leakage path at this location. To ensure a good seal, the primary sealing ring 4 possesses a certain degree of flexibility and elasticity; typically, the primary sealing ring 4 is made of rubber.

[0024] As previously described, the primary sealing ring 4 and the secondary sealing ring 5 form a two-stage seal at the mating point between the lid 2 and the body 3, extending from inside the mixing tank to the outside. Therefore, the primary sealing ring 4 directly faces the pressure inside the mixing tank. To prevent excessive deformation of the primary sealing ring 4 and subsequent seal failure, the secondary sealing ring 5 is fitted over the primary sealing ring 4. Here, "fitted over the primary sealing ring 4" specifically refers to the relative positional relationship between the primary sealing ring 4 and the secondary sealing ring 5, not emphasizing their direct assembly relationship. For example, in different embodiments, the secondary sealing ring 5 can be directly installed on the primary sealing ring 4, or indirectly fitted over the primary sealing ring 4 by installing it on the sealing ring fixing seat 1 or even the lid 2. The secondary sealing ring 5 is used to press tightly between the lid 2 and the body 3 to achieve a sealing fit with the lid and body, thus preventing backflow. Figure 1 , Figure 4 and Figure 5As shown, the secondary sealing ring 5 supports the primary sealing ring 4 through the skirt 501 at its lower part. The skirt 501 is annular in shape and is arranged concentrically with the other parts of the secondary sealing ring 5. When the lid 2 and the body 3 are fastened together, the skirt 501 will press the primary sealing ring 4 radially inward along the sealing ring fixing seat 1, thereby providing auxiliary support for the primary sealing ring 4 and reducing the probability of its sealing failure.

[0025] The relative positions of the primary sealing ring 4 and the secondary sealing ring 5 determine that the primary sealing ring 4 will directly face the pressure inside the mixing tank, while the secondary sealing ring 5 indirectly resists the pressure inside the mixing tank through the primary sealing ring 4. However, when the primary sealing ring 4 fails, the secondary sealing ring 5 will directly face the pressure inside the mixing tank. Although supporting the primary sealing ring 4 with the secondary sealing ring 5 can usually solve the problem of the primary sealing ring 4 failing, as a precaution, to prevent the secondary sealing ring 5 from being damaged by air pressure in the event of the primary sealing ring 4 failing, as a preferred embodiment, such as... Figure 1 As shown, the skirt 501 of the secondary sealing ring 5 is designed to be radially inclined inward along the sealing ring fixing seat 1 from top to bottom. When in use, the skirt 501 of this inclined structure forms a pressure chamber 6 with the primary sealing ring 4. At this time, even if the primary sealing ring 4 leaks, when the air pressure in the mixing tank directly acts on the secondary sealing ring 5, the air pressure in the pressure chamber 6 will increase. The increased air pressure will act on the skirt 501, causing it to further press against the end face of the tank. Under this action, the following phenomenon will occur: the greater the air pressure in the mixing tank, the greater the pressing force between the skirt 501 of the secondary sealing ring 5 and the end face of the tank, and the better the sealing effect.

[0026] In addition, the air pressure entering the air chamber 6 will not only act on the skirt 501, but will also form a pressure in the air chamber 6 equal to that in the mixing tank. At this time, the pressure on both sides of the primary sealing ring 4 will tend to be balanced, which will also restore the sealing function of the primary sealing ring 4.

[0027] The function of the skirt 501 is to assist in supporting the primary sealing ring 4 to prevent its sealing failure. Therefore, those skilled in the art should understand that although the skirt 501 is set as an inclined structure in the above embodiment to form the air chamber 6, it is not necessary to set the skirt 501 as such an inclined structure in order to achieve the function of supporting the primary sealing ring 4. For example, in some other embodiments, the skirt 501 can also be a cylindrical structure, extending downward from the inner wall of the secondary sealing ring 5. On this basis, in order to achieve a better support effect, a reinforcing convex ring can also be provided at the lower edge of the skirt 501 to obtain higher support strength.

[0028] The inclination angle of the skirt 501 will have a certain impact on its support effect on the primary sealing ring 4. In order to obtain a better support effect on the primary sealing ring 4, in a preferred embodiment, the inclination angle α of the skirt 501 in the vertical plane is 40°-50°. For example, the inclination angle can be 40°, 12°, 45°, 47° or 50°. In addition, by designing the wall thickness of the skirt 501, it can be deformed within a preset range to achieve a better support effect on the primary sealing ring 4 and the sealing fit with the barrel body 3. Therefore, in a preferred embodiment, the thickness of the skirt 501 gradually decreases from top to bottom. Of course, the above is only an optimized design of the skirt 501. In other embodiments, the skirt 501 can also be set as a structure with a uniform wall thickness as needed. In this case, it can still meet the functions of supporting the primary sealing ring 4 and sealing fit with the end face of the barrel body 3.

[0029] The primary sealing ring 4 serves as the first line of defense for sealing the barrel body 3 and the barrel lid 2, and its sealing effect directly determines the sealing performance of the mixing barrel. Therefore, in a preferred embodiment, such as Figure 2 and Figure 3 As shown, two sealing structures are provided on the primary sealing ring 4. In this embodiment, the primary sealing ring 4 includes a base 401 that mates with the sealing ring fixing seat 1, and an inner sealing layer 402 and an outer sealing layer 403 extending downward from the base 401. The inner sealing layer 402 protrudes downward from the outer sealing layer 403 to seal against the inner wall surface of the barrel 3. The inner sealing layer 402 effectively achieves the fit between the primary sealing ring 4 and the inner circumferential surface of the barrel 3. The outer sealing layer 403 is used to press against the end face of the corresponding barrel 3 to seal against the end face of the barrel 3. The outer sealing layer 403 acts as a sealing gasket here, and its fit with the end face of the barrel 3 forms another sealing structure. Based on this, as a better embodiment, the outer sealing layer 403 and the base 401 are coplanar in the vertical direction, and the inner sealing layer 402 and the outer sealing layer 403 are arranged radially at intervals along the sealing ring fixing seat 1 so that the cross-section of the primary sealing ring forms an "h" shape. This shape of the primary sealing ring 4 is more conducive to the inner sealing layer 402 and the outer sealing layer 403 each exerting their sealing performance and not interfering with each other.

[0030] By setting the cross-section of the primary sealing ring 4 to the aforementioned "h" shape, a step 404 can be formed at the upper adjacent position of the inner sealing layer 402 and the outer sealing layer 403. By fully utilizing this step 404, the sealing fit between the primary sealing ring 4 and the sealing ring fixing seat 1 can be optimized. Therefore, in a preferred embodiment, a stepped surface 101 is provided on the sealing ring fixing seat 1, and the step 404 formed at the connection between the upper end of the outer sealing layer 403 and the base 401 is sealed and fitted with the stepped surface 101. Figure 1 (Point A in the middle).

[0031] Although the inner sealing layer 402 and the outer sealing layer 403 are arranged in a spaced-apart configuration in the above embodiments, in other embodiments, they can be arranged in a tightly fitted configuration, or even as a single integrated configuration, as long as they have a structure that can seal and cooperate with the inner wall surface and end face of the barrel 3 respectively. Furthermore, when the inner sealing layer 402 and the outer sealing layer 403 are arranged in a spaced-apart configuration, the base 401 can be offset to the right, so that it is located radially between the inner and outer sealing layers at the sealing ring fixing seat.

[0032] To prevent the primary sealing ring 4 from falling off during use, the primary sealing ring 4 can be fixed relative to the sealing ring fixing seat 1. For example, in a preferred embodiment, the primary sealing ring 4 is secured by a clamp 7 (such as...). Figure 6 The primary sealing ring 4 (as shown) is fixedly installed in the sealing ring fixing seat 1 by clamping. The clamp 7 can quickly fix the primary sealing ring 4, and the clamp 7 can also reinforce the primary sealing ring 4 radially. In other embodiments, in order to fix the primary sealing ring 4 relative to the sealing ring fixing seat 1, methods such as bonding, riveting, screw connection, and interference fit connection can also be used, which will not be described in detail here.

[0033] The secondary sealing ring 5 is fitted over the primary sealing ring 4 and is pressed between the end faces of the lid 2 and the body 3 during use. Therefore, it can be fixed using the lid 2 and body 3 of the mixing tank. However, to form a single module with the primary sealing ring 4 for easier assembly, the secondary sealing ring 5 can be fixed to the primary sealing ring 4. For example, in a preferred embodiment, the secondary sealing ring 5 is fixed to the primary sealing ring 4 with an interference fit. Similarly, in other embodiments, the secondary sealing ring 5 can also be fixed to the primary sealing ring 4 by bonding or other methods.

[0034] For ease of replacement and maintenance of the sealing assembly, a detachable sealing assembly from the lid is ideal. Therefore, in a preferred embodiment, such as... Figure 7 and Figure 8 As shown, the upper surface of the sealing ring fixing seat 1 is provided with a threaded connection hole 102 for mounting to the corresponding bucket lid 2 by a fastening screw 8. In use, the sealing assembly can be quickly fixed to the bucket lid 2 by the fastening screw 8 passing through the threaded connection hole 102 from top to bottom. To disassemble the sealing assembly, it can be quickly removed by loosening the fastening screw 8. To ensure a seal at the installation location, a rubber gasket 9 can be placed between the sealing ring fixing seat 1 and the inner surface of the bucket lid 2.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. An electrode mixing apparatus comprising a seal assembly, characterized by, The sealing assembly includes an annular sealing ring holder, on which a primary sealing ring is fixedly fitted. The primary sealing ring is in a sealing fit with the sealing ring holder and / or the upper end of the primary sealing ring protrudes from the upper end of the sealing ring holder to form a lid sealing end for sealing fit with the lid of the mixing tank. The lower end of the primary sealing ring is used to seal fit with the body of the mixing tank to form a body sealing end. A secondary sealing ring is also fitted outside the primary sealing ring. The secondary sealing ring is used to be pressed between the lid and the body to seal fit with the lid and the body. A skirt is provided at the lower part of the secondary sealing ring to press the primary sealing ring radially inward along the sealing ring holder during use.

2. The cell mixing apparatus of claim 1, wherein The skirt slopes radially inward from top to bottom along the sealing ring fixing seat, forming a compressed air chamber with the primary sealing ring during use.

3. The cell mixing apparatus of claim 2, wherein, The inclination angle of the skirt in the vertical plane is 40°-50°.

4. The battery cell mixing equipment according to claim 2, characterized in that, The thickness of the skirt gradually decreases from top to bottom.

5. The battery cell mixing equipment according to any one of claims 1-4, characterized in that, The primary sealing ring includes a base that mates with the sealing ring fixing seat, and an inner sealing layer and an outer sealing layer extending downward from the base. The inner sealing layer protrudes downward from the outer sealing layer to seal against the inner wall of the barrel, and the outer sealing layer is used to press against the end face of the corresponding barrel to seal against the end face of the barrel.

6. The battery cell mixing equipment according to claim 5, characterized in that, The outer sealing layer and the base are coplanar in the vertical direction, and the inner sealing layer and the outer sealing layer are arranged radially at intervals along the sealing ring fixing seat so that the cross-section of the primary sealing ring forms an "h" shape.

7. The battery cell mixing equipment according to claim 6, characterized in that, A stepped surface is provided on the sealing ring fixing seat, and the step formed at the connection between the upper end of the outer sealing layer and the base is sealed and fitted with the stepped surface.

8. The battery cell mixing equipment according to any one of claims 1-4, characterized in that, The primary sealing ring is fixedly installed on the sealing ring fixing seat by means of a clamp.

9. The battery cell mixing equipment according to any one of claims 1-4, characterized in that, The secondary sealing ring is fixed to the primary sealing ring by an interference fit.

10. The battery cell mixing equipment according to any one of claims 1-4, characterized in that, The upper end face of the sealing ring fixing seat is provided with a threaded connection hole for installation on the corresponding bucket lid by fastening screws.

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