Sealing ring and battery stack

Abstract

The utility model provides a sealing ring and a battery stack. The sealing ring comprises an outer sealing ring, an inner sealing ring and a connecting part arranged between the outer sealing ring and the inner sealing ring, the outer sealing ring and the inner sealing ring are thicker than the connecting part; and the inner sealing ring is thicker than the outer sealing ring. The sealing ring provided by the embodiment of the utility model comprises the outer sealing ring and the inner sealing ring, double-layer sealing can be carried out, the outer sealing ring and the inner sealing ring are connected through the connecting part, assembly is relatively simple, the sealing ring can be manufactured through a set of mold, and the cost is relatively low. The thickness of the inner sealing ring is larger than that of the outer sealing ring, so that when the sealing ring is installed, the inner sealing ring is compressed earlier than the outer sealing ring, and the quality of double-layer sealing is guaranteed.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of sealing, and particularly relates to a sealing ring and a battery stack. BACKGROUND

[0002] The current sealing ring can only achieve a single sealing purpose, and in some scenarios requiring two-layer sealing, two sealing rings are usually used to achieve the purpose. However, using two sealing rings requires two sets of molds, and the mold cost, management cost and service cost are high, and the assembly of the two sealing rings is relatively cumbersome, and the assembly efficiency is also relatively low.

[0003] Therefore, the technical field needs a sealing ring with lower cost and simpler assembly in scenarios requiring two-layer sealing. CONTENT OF THE UTILITY MODEL

[0004] In view of the problems existing in the prior art, a sealing ring and a battery stack are provided, and the sealing ring has lower cost and simpler assembly.

[0005] The application provides the following solutions.

[0006] In a first aspect, the application provides a sealing ring, which comprises: an outer sealing ring, an inner sealing ring and a connecting portion arranged between the outer sealing ring and the inner sealing ring.

[0007] The thicknesses of the outer sealing ring and the inner sealing ring are greater than the thickness of the connecting portion.

[0008] The thickness of the inner sealing ring is greater than the thickness of the outer sealing ring.

[0009] In some possible embodiments, the sealing ring is arranged between a stack wet end plate and a manifold of a battery stack, and the manifold comprises a manifold body and a manifold flange face.

[0010] The inner sealing ring is arranged between the manifold body and the stack wet end plate.

[0011] The outer sealing ring is arranged between the edge of the manifold flange face and the stack wet end plate.

[0012] In some possible embodiments, the inner sealing ring comprises a first annular portion, a second annular portion, a third annular portion, a first annular connecting portion and a second annular connecting portion which are independent of each other.

[0013] The first annular portion is used for sealing an air interface, the second annular portion is used for sealing a cooling liquid interface, and the third annular portion is used for sealing a hydrogen gas interface.

[0014] The first annular part and the second annular part are connected through a first annular connecting part, and the third annular part and the second annular part are connected through a second annular connecting part. In some possible embodiments, one side of the outer sealing ring and the inner sealing ring contacting the wet end plate of the stack is a bimodal structure, and the other side of the outer sealing ring and the inner sealing ring contacting the manifold is a unimodal structure.

[0015] In some possible embodiments, the sealing ring is arranged in a groove at a position where the wet end plate of the stack contacts the manifold.

[0016] The groove comprises an inner groove and an outer groove.

[0017] The inner groove is matched with the shape of the inner sealing ring, and the outer groove is matched with the shape of the outer sealing ring.

[0018] In some possible embodiments, the connecting part is provided with a positioning protrusion at a position contacting a surface of the wet end plate of the stack.

[0019] The wet end plate of the stack is provided with a positioning groove, and the positioning groove is in one-to-one correspondence with the position of the positioning protrusion.

[0020] In some possible embodiments, the thickness of the outer sealing ring is 6mm-8mm, and the thickness of the inner sealing ring is 0.5mm more than the thickness of the outer sealing ring.

[0021] In the second aspect, the application provides a battery stack, comprising: a sealing ring and a wet end plate of a stack, the wet end plate of the stack being connected to a manifold through the sealing ring, and the sealing ring comprising an outer sealing ring, an inner sealing ring and a connecting part arranged between the outer sealing ring and the inner sealing ring.

[0022] The thickness of the outer sealing ring and the inner sealing ring is greater than the thickness of the connecting part.

[0023] The thickness of the inner sealing ring is greater than the thickness of the outer sealing ring.

[0024] In some possible embodiments, the manifold comprises a manifold body and a manifold flange surface.

[0025] The manifold body and the wet end plate of the stack are sealed through the inner sealing ring.

[0026] The edge of the manifold flange surface and the wet end plate of the stack are sealed through the outer sealing ring.

[0027] In some possible embodiments, one side of the outer sealing ring and the inner sealing ring contacting the wet end plate of the stack is a bimodal structure, and the other side of the outer sealing ring and the inner sealing ring contacting the manifold is a unimodal structure.

[0028] In some possible embodiments, the sealing ring is arranged in a groove at a position where the wet end plate of the stack contacts the manifold; the groove comprises an inner groove and an outer groove; the inner groove is matched with the shape of the inner sealing ring, and the outer groove is matched with the shape of the outer sealing ring.

[0029] In some possible embodiments, the connecting part contacts the surface of the wet end plate of the stack, and the wet end plate of the stack is provided with positioning grooves corresponding to the positions of the positioning protrusions.

[0030] In some possible embodiments, the thickness of the outer sealing ring is 6mm-8mm, and the thickness of the inner sealing ring is 0.5mm more than that of the outer sealing ring.

[0031] The sealing ring provided by the embodiments of the present application comprises an outer sealing ring and an inner sealing ring, which can perform double-layer sealing, and the outer sealing ring and the inner sealing ring are connected through a connecting part, so that the assembly is relatively simple, the sealing ring can be manufactured through a set of molds, and the cost is relatively low. Moreover, the thickness of the inner sealing ring is greater than that of the outer sealing ring, so that the inner sealing ring is compressed first than the outer sealing ring when the sealing ring is installed, thereby ensuring the quality of double-layer sealing.

[0032] Other advantages of the present application will be described in more detail in conjunction with the following description and drawings.

[0033] It should be understood that the above description is only a summary of the technical solutions of the present application, so as to enable a clearer understanding of the technical means of the present application, and the content of the description can be implemented. In order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described below. BRIEF DESCRIPTION OF DRAWINGS

[0034] By reading the detailed description of the exemplary embodiments below, those skilled in the art will understand the advantages and benefits described herein and other advantages and benefits. The drawings are only for the purpose of illustrating exemplary embodiments and are not considered as limiting the present application. Moreover, the same reference numbers are used to represent the same components throughout the drawings. In the drawings:

[0035] Figure 1 A schematic diagram of a sealing ring provided by the embodiments of the present application;

[0036] Figure 2 A schematic diagram of a battery stack to which the sealing ring provided by the embodiments of the present application is applied;

[0037] Figure 3 A cross-sectional view of an outer sealing ring provided by the embodiments of the present application;

[0038] Figure 4 A schematic diagram of a battery stack to which another sealing ring provided by the embodiments of the present application is applied;

[0039] Figure 5 A schematic diagram of another sealing ring provided by the embodiments of the present application;

[0040] Figure 6 FIG. 1 is a schematic view of a positioning protrusion of a sealing ring according to an embodiment of the present application;

[0041] Figure 7 FIG. 2 is a schematic view of a battery stack according to an embodiment of the present application.

[0042] In the drawings, the components represented by the same reference numerals are the same or corresponding parts.

[0043] Sealing ring 100; outer sealing ring 110; unimodal structure 111; bimodal structure 112; inner sealing ring 120; first annular portion 121; second annular portion 122; third annular portion 123; first annular connecting portion 124; second annular connecting portion 125; connecting portion 130; positioning protrusion 131; stack wet end plate 200; recess 210; inner recess 211; outer recess 212; positioning groove 220; manifold 300; manifold body 310; manifold flange face 320.

[0044] In the drawings, the components represented by the same reference numerals are the same or corresponding parts. DETAILED DESCRIPTION

[0045] Exemplary embodiments of the present application will be described in detail with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application can be embodied in various forms without being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.

[0046] In the description of the embodiments of the present application, it should be understood that terms such as "include" or "have" are intended to indicate that there are the features, numbers, steps, actions, components, parts or combinations thereof described in the specification, and do not exclude the presence or addition of one or more other features, numbers, steps, actions, components, parts or combinations thereof. The terms "first", "second" and the like are used only to distinguish the same or similar technical features, and should not be understood as indicating or implying a relative importance or quantity thereof. Therefore, the features defined by "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, unless otherwise stated, the meaning of the term "a plurality of" is two or more than two.

[0047] Unless otherwise defined, "or" means "and / or", for example, A / B can mean A or B. "And / or" as used herein is to be taken as a separate listing of the items that are being described. Spatially relative terms, such as "under", "below", "lower", "above", "upper" and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures.

[0048] In addition, it should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0049] Referring to Figure 1 , the figure is a schematic diagram of a sealing ring provided by an embodiment of the present application.

[0050] As Figure 1 shown, the sealing ring 100 provided by the embodiment of the present application includes an outer sealing ring 110, an inner sealing ring 120, and a connecting portion 130 arranged between the outer sealing ring 110 and the inner sealing ring 120.

[0051] The thickness of the outer sealing ring 110 and the inner sealing ring 120 is greater than the thickness of the connecting portion 130, and the thickness of the inner sealing ring 120 is greater than the thickness of the outer sealing ring 110. It should be noted that the sealing ring provided by the embodiment of the present application can be made of various materials, which is not limited in the embodiment of the present application. The sealing ring provided by the embodiment of the present application can be applied to various scenes of double-layer sealing. As an example, the thickness of the outer sealing ring 110 can be 6mm~8mm, and the thickness of the inner sealing ring 120 is 0.5mm greater than the thickness of the outer sealing ring 110.

[0052] Therefore, the sealing ring provided by the embodiment of the present application includes the outer sealing ring 110 and the inner sealing ring 120, which can be double-layer sealed, and the outer sealing ring 110 and the inner sealing ring 120 are connected through the connecting portion 130, which is simple to assemble, and the sealing ring can be manufactured through a set of molds, which is low in cost. Moreover, the thickness of the inner sealing ring 120 is greater than the thickness of the outer sealing ring 110, which can make the inner sealing ring 120 be compressed first when the sealing ring is installed, thereby ensuring the quality of double-layer sealing. At the same time, the function of the inner sealing ring 110 is more critical, which can ensure that the inner sealing ring has sufficient compression to ensure sealing.

[0053] As a possible implementation, the sealing ring provided by the embodiment of the present application can be applied to a battery stack. AsFigure 2 As shown, the sealing ring 100 provided by the embodiments of the present application can be arranged between the wet end plate 200 of the battery stack and the manifold 300. The manifold 300 in the embodiments of the present application can include a manifold body 310 and a manifold flange surface 320. The manifold body 310 is sealed with the wet end plate 200 by the inner sealing ring 120; the edge of the manifold flange surface 320 is sealed with the wet end plate 200 by the outer sealing ring 110. It should be noted that the inner sealing ring 100 in the embodiments of the present application can be used to seal the air, cooling liquid and hydrogen entering the stack, so that the air, cooling liquid and hydrogen do not leak and do not intermix. The outer sealing ring 110 can be used to avoid the entry of external dust, water vapor and the like into the contact surface of the manifold flange surface 320 and the wet end plate 200 of the stack, and the contact surface of the manifold flange surface 320 and the wet end plate 200 of the stack and the related components thereof are affected by the dust or water vapor in the environment.

[0054] As a possible implementation, the side of the outer sealing ring 110 and the inner sealing ring 120 contacting the wet end plate 200 in the embodiments of the present application is a double-peak structure, and the side of the outer sealing ring 110 and the inner sealing ring 120 contacting the manifold 300 is a single-peak structure. As shown in Figure 3 As shown, taking the cross-sectional view of the outer sealing ring 110 as an example, the side of the outer sealing ring 110 contacting the wet end plate 200 is a double-peak structure 112, and the side of the outer sealing ring 110 contacting the manifold 300 is a single-peak structure 111. It should be noted that the side of the outer sealing ring 110 and the inner sealing ring 120 contacting the wet end plate 200 is a double-peak structure, which can make the outer sealing ring 110 and the inner sealing ring 120 be compressed downward when being extruded, avoiding the bending of the sealing ring when being extruded, which can cause sealing failure. The side of the outer sealing ring 110 and the inner sealing ring 120 contacting the manifold 300 is a single-peak structure, and the single-peak structure has two chamfers, which is beneficial to closely fit with the sealing surface, achieving good sealing effect.

[0055] In the embodiments of the present application, the sealing ring can be arranged in the groove. As shown in Figure 4 As shown, the sealing ring 100 is arranged in the groove 210 at the contact position of the wet end plate 200 and the manifold 300. The groove 210 includes an inner groove 211 and an outer groove 212. The inner groove 211 matches the shape of the inner sealing ring 120, and the outer groove 212 matches the shape of the outer sealing ring 110, so that the inner sealing ring 120 can be installed inside the inner groove 211, and the outer sealing ring 110 can be installed inside the outer groove 212. As shown in Figure 5As shown, the inner sealing ring 120 includes a first annular part 121, a second annular part 122, a third annular part 123, a first annular connecting part 124 and a second annular connecting part 125, which are independent of each other; the first annular part 121 is used for sealing the air interface, the second annular part 122 is used for sealing the cooling liquid interface, and the third annular part 123 is used for sealing the hydrogen gas interface; the first annular part 121 and the second annular part 122 are connected through the first annular connecting part 124, and the third annular part 123 and the second annular part 122 are connected through the second annular connecting part 125.

[0056] As shown in Figure 4 and Figure 5 , the connecting part 130 is provided with a positioning protrusion 131, and the wet end plate 200 of the stack is provided with a positioning groove 220 corresponding to the position of the positioning protrusion 131. As shown in Figure 6 , the shape of the positioning protrusion 131 provided by the embodiment of the present application can be a circular truncated cone, which is not limited in the embodiment of the present application. It should be noted that the shape of the positioning protrusion 131 in the embodiment of the present application is usually matched with the shape of the positioning groove 220, so that the positioning protrusion 131 can be clamped into the positioning groove 220 to prevent the sealing ring 100 from falling or moving during extrusion. The number of the positioning protrusions 131 in the embodiment of the present application can be 6 or other numbers, which is not limited in the embodiment of the present application.

[0057] In summary, the sealing ring provided by the embodiment of the present application can be double-sealed by the outer sealing ring and the inner sealing ring, and the outer sealing ring and the inner sealing ring are connected through the connecting part, which is simple to assemble, and the sealing ring can be manufactured by a set of molds, which is low in cost. Moreover, the thickness of the inner sealing ring is greater than that of the outer sealing ring, so that the inner sealing ring is compressed first than the outer sealing ring when the sealing ring is installed, thereby ensuring the quality of double sealing.

[0058] According to the sealing ring provided by the above-mentioned embodiment, the embodiment of the present application further provides a battery stack.

[0059] As shown in Figure 7 , the battery stack provided by the embodiment of the present application comprises a sealing ring 100 and a wet end plate 200 of a stack, the wet end plate 200 of the stack is connected to the manifold 300 through the sealing ring 100, and the sealing ring 100 comprises an outer sealing ring 110, an inner sealing ring 120 and a connecting part 130 arranged between the outer sealing ring 110 and the inner sealing ring 120.

[0060] The thicknesses of the outer sealing ring 110 and the inner sealing ring 120 are greater than the thickness of the connecting part 130.

[0061] The thickness of the inner sealing ring 120 is greater than the thickness of the outer sealing ring 110.

[0062] between the stack wet end plate and the manifold.

[0063] As an example, the thickness of the outer sealing ring is 6mm-8mm, and the thickness of the inner sealing ring is 0.5mm more than that of the outer sealing ring. As a possible implementation, the manifold comprises a manifold body and a manifold flange surface; the manifold body is sealed with the stack wet end plate by the inner sealing ring; the edge of the manifold flange surface is sealed with the stack wet end plate by the outer sealing ring.

[0064] As a possible implementation, the side of the outer sealing ring and the inner sealing ring contacting the stack wet end plate is a bimodal structure, and the side of the outer sealing ring and the inner sealing ring contacting the manifold is a unimodal structure.

[0065] As a possible implementation, the sealing ring is arranged in the groove at the position where the stack wet end plate contacts the manifold; the groove comprises an inner groove and an outer groove; the inner groove matches the shape of the inner sealing ring, and the outer groove matches the shape of the outer sealing ring.

[0066] As a possible implementation, the surface of the connecting part contacting the stack wet end plate is provided with a positioning protrusion; the stack wet end plate is provided with a positioning groove, and the position of the positioning groove corresponds to the position of the positioning protrusion one by one.

[0067] It should be noted that the battery stack in the embodiments of the present application can include the components of the embodiments of the sealing ring described above, and achieve the same effects and functions, which will not be described here.

[0068] Although the illustrative embodiments of the present application have been described and illustrated in detail in the accompanying drawings and the foregoing description, they should be considered as illustrative and not restrictive, and it should be understood that only certain exemplary embodiments have been shown and described and that all changes and modifications that are within the spirit of the claimed invention are intended to be protected. It should be understood that although the words such as preferred, preferred, preferred or more preferred are used in the above description, it can not be necessary and it can be envisaged that the embodiments without these features are within the scope of the present application, which is defined by the appended claims. When reading the claims, when using words such as "one", "one", "at least one" or "at least one part", it is not intended to limit the claims to only one, unless specifically stated in the claims. When the language "at least one part" and / or "a part" is used, the item can include a part and / or the whole item, unless specifically stated to the contrary.

[0069] While the spirit and principles of the application have been described with reference to several specific embodiments, it is to be understood that the application is not limited to the specific embodiments disclosed and that the division into sections is not meant to imply that features of the aspects cannot be combined. The application is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the claims appended hereto.

Claims

1. A seal ring, characterized by, The sealing ring comprises an outer sealing ring, an inner sealing ring and a connecting part arranged between the outer sealing ring and the inner sealing ring; The thickness of the outer sealing ring and the inner sealing ring is greater than the thickness of the connecting part; The thickness of the inner sealing ring is greater than the thickness of the outer sealing ring.

2. The seal ring of claim 1, wherein The sealing ring is arranged between the wet end plate of the battery stack and the manifold, and the manifold comprises a manifold body and a manifold flange face; The inner sealing ring is arranged between the manifold body and the wet end plate of the battery stack; The outer sealing ring is arranged between the edge of the manifold flange face and the wet end plate of the battery stack.

3. The seal ring of claim 2, wherein, The inner sealing ring comprises a first annular part, a second annular part, a third annular part, a first annular connecting part and a second annular connecting part; The first annular part is used for sealing an air interface, the second annular part is used for sealing a cooling liquid interface, and the third annular part is used for sealing a hydrogen gas interface; The first annular part and the second annular part are connected through the first annular connecting part, and the third annular part and the second annular part are connected through the second annular connecting part.

4. The seal ring of claim 2, wherein The side of the outer sealing ring and the inner sealing ring contacting the wet end plate of the battery stack is a bimodal structure, and the side of the outer sealing ring and the inner sealing ring contacting the manifold is a unimodal structure.

5. The seal ring of claim 2, wherein The sealing ring is arranged in a groove at the contact position of the wet end plate and the manifold; The groove comprises an inner groove and an outer groove; The inner groove is matched with the shape of the inner sealing ring, and the outer groove is matched with the shape of the outer sealing ring.

6. The seal ring of claim 1, wherein The surface of the connecting part contacting the wet end plate of the battery stack is provided with a positioning protrusion; The wet end plate of the battery stack is provided with a positioning groove, and the positions of the positioning groove and the positioning protrusion correspond one by one.

7. The seal ring of claim 1, wherein The thickness of the outer sealing ring is 6mm-8mm, and the thickness of the inner sealing ring is 0.5mm greater than the thickness of the outer sealing ring.

8. A cell stack, characterised in that The battery stack comprises a sealing ring and a wet end plate of the battery stack, the wet end plate of the battery stack is connected with a manifold through the sealing ring, and the sealing ring comprises an outer sealing ring, an inner sealing ring and a connecting part arranged between the outer sealing ring and the inner sealing ring; The thickness of the outer sealing ring and the inner sealing ring is greater than the thickness of the connecting part; The thickness of the inner sealing ring is greater than the thickness of the outer sealing ring.

9. The cell stack of claim 8, wherein, The manifold comprises a manifold body and a manifold flange face; The inner sealing ring is arranged between the manifold body and the wet end plate of the battery stack; The outer sealing ring is arranged between the edge of the manifold flange face and the wet end plate of the battery stack.

10. The cell stack of claim 9, wherein, The side of the outer sealing ring and the inner sealing ring contacting the wet end plate of the battery stack is a bimodal structure, and the side of the outer sealing ring and the inner sealing ring contacting the manifold is a unimodal structure.

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