Insulators, cover plate assemblies and battery cells

Abstract

This utility model discloses an insulating component, a cover plate assembly, and a battery cell structure, relating to the field of battery technology. The insulating component includes an insulating body and a flow-guiding structure. The insulating body has a first mounting side in its thickness direction and a through hole. The flow-guiding structure is connected to the insulating body and spans the through hole. An outlet is formed on the insulating component, communicating with the through hole and arranged laterally along the through hole. The outlet is formed on the flow-guiding structure, and / or the outlet is confined between the insulating body and the flow-guiding structure. By providing the flow-guiding structure, the electrolyte flowing axially along the through hole is guided to flow laterally along the through hole. This prevents the electrolyte from directly scouring the battery cell assembly when injecting electrolyte into the battery, reducing the probability of active material shedding or separator flipping within the cell assembly. This solves the problem of electrolyte scouring the battery cell assembly during injection using existing injection holes.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to an insulating component, a cover plate assembly, and a battery cell. Background Technology

[0002] Currently, the electrolyte injection holes on battery casings are generally cylindrical through-hole structures. During electrolyte injection, the electrolyte directly washes over the battery cell components, which can easily cause problems such as active materials falling off the electrode plates or the separator folding, thus affecting the performance of the battery cell. Utility Model Content

[0003] The main purpose of this invention is to provide an insulating component, a cover plate assembly, and a battery cell, which aims to solve the problem that the electrolyte will wash away the battery cell assembly during the injection process.

[0004] To achieve the above objectives, the insulating component proposed in this utility model includes: An insulating body having a first mounting side in its thickness direction, the insulating body having a through hole; and... A flow guiding structure is provided on the first mounting side, the flow guiding structure is connected to the insulating body, and spans across the through hole; A liquid outlet is formed on the insulating element, communicating with the through hole and arranged laterally along the through hole. The liquid outlet is formed on the flow guiding structure, and / or the liquid outlet is defined between the insulating body and the flow guiding structure.

[0005] In one embodiment, the flow guiding structure includes a first baffle extending laterally along the through hole. The first baffle is connected to the edge of the through hole via a first connecting plate portion to define a first liquid outlet between the first baffle and the insulating body. The liquid outlet includes the first liquid outlet.

[0006] In one embodiment, a through hole extending axially along the through hole is provided on the first baffle. The flow guiding structure further includes a second baffle. The second baffle is connected to the edge of the through hole of the first baffle through a second connecting plate portion to define a second liquid outlet between the first baffle and the second baffle. The liquid outlet includes the second liquid outlet.

[0007] In one embodiment, the liquid outlet is arranged along the width direction of the insulating body; or, The liquid outlet is arranged along the length of the insulating body.

[0008] In one embodiment, two liquid outlets are provided, both of which are distributed laterally along the through hole, and the two liquid outlets face opposite directions.

[0009] In one embodiment, a limiting protrusion is provided on the first mounting side of the insulating body, the height of the limiting protrusion is H1, and the height of the flow guiding structure is H2, wherein H1≥H2.

[0010] This utility model also provides a cover plate assembly, the cover plate assembly including a cover body and an insulating component, the insulating component including: An insulating body having a first mounting side in its thickness direction, the insulating body having a through hole; and... A flow guiding structure is provided on the first mounting side, the flow guiding structure is connected to the insulating body, and spans across the through hole; A liquid outlet is formed on the insulating member, communicating with the through hole and arranged laterally along the through hole, the liquid outlet is formed on the flow guiding structure, and / or, the liquid outlet is defined between the insulating body and the flow guiding structure; The cover is provided with a liquid injection hole, the insulating component is provided on the cover, and the through hole of the insulating component is connected to the liquid injection hole.

[0011] In one embodiment, the flow guiding structure includes a first baffle extending laterally along the through hole, the first baffle being connected to the edge of the through hole via a first connecting plate portion to define a first liquid outlet between the first baffle and the insulating body; A through hole extending axially along the through hole is provided on the first baffle. The flow guiding structure also includes a second baffle. The second baffle is connected to the edge of the through hole of the first baffle through a second connecting plate to define a second liquid outlet between the first baffle and the second baffle. The cross-sectional area of ​​the injection hole on the side of the cover facing the insulating component is S1, the cross-sectional area of ​​the first liquid outlet is S2, and the cross-sectional area of ​​the second liquid outlet is S3, wherein S2+S3≥S1.

[0012] This utility model also provides a battery cell, the battery cell including a housing and a cover plate assembly, the cover plate assembly including a cover body and an insulating component, the insulating component including: An insulating body having a first mounting side in its thickness direction, the insulating body having a through hole; and... A flow guiding structure is provided on the first mounting side, the flow guiding structure is connected to the insulating body, and spans across the through hole; A liquid outlet is formed on the insulating member, communicating with the through hole and arranged laterally along the through hole, the liquid outlet is formed on the flow guiding structure, and / or, the liquid outlet is defined between the insulating body and the flow guiding structure; The cover is provided with a liquid injection hole, the insulating component is provided on the cover, and the through hole of the insulating component is connected to the liquid injection hole.

[0013] This utility model also provides a battery cell, the battery cell including a shell and an insulating component, the insulating component including: An insulating body having a first mounting side in its thickness direction, the insulating body having a through hole; and... A flow guiding structure is provided on the first mounting side, the flow guiding structure is connected to the insulating body, and spans across the through hole; A liquid outlet is formed on the insulating member, communicating with the through hole and arranged laterally along the through hole, the liquid outlet is formed on the flow guiding structure, and / or, the liquid outlet is defined between the insulating body and the flow guiding structure; The side wall of the housing is provided with a liquid injection hole, and the insulating component is disposed inside the housing. The through hole of the insulating component is connected to the liquid injection hole.

[0014] In the technical solution of this utility model, by setting a through hole, the electrolyte injected from the injection hole can pass through the insulating body and flow to the flow guiding structure. By setting a flow guiding structure, the electrolyte flowing axially along the through hole is guided to flow laterally along the through hole. This avoids the electrolyte directly washing over the battery cell assembly when injecting electrolyte into the battery, thereby reducing the probability of problems such as active material shedding or separator flipping in the cell assembly. This helps to improve the stability of battery performance and solves the problem that the electrolyte washes over the battery cell assembly when injecting electrolyte through the existing injection hole. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the insulating component provided by this utility model; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 for Figure 1 A front view schematic diagram of the flow guiding structure in the middle; Figure 4 for Figure 1 A side view of the insulating component; Figure 5An exploded view of an embodiment of the cover plate assembly provided by this utility model; Figure 6 for Figure 5 A top view of the cover plate assembly; Figure 7 This is a three-dimensional structural diagram of an embodiment of the battery cell provided by this utility model.

[0017] Explanation of icon numbers: 100. Insulating component; 110. Insulating body; 111. Through hole; 112. First mounting side; 120. Flow guiding structure; 121. First baffle; 122. First connecting plate portion; 123. Second baffle; 124. Second connecting plate portion; 125. Liquid outlet; 1251. First liquid outlet branch; 1252. Second liquid outlet branch; 130. Limiting protrusion; 200. Cover assembly; 210. Cover body; 220. Pole post; 230. Pressure relief structure; 1000, battery cell; 300, casing; 400, electrolyte filling hole.

[0018] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] The technical solutions of some embodiments provided in this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] It should be noted that if some embodiments provided in this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0021] Furthermore, if some embodiments provided in this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] Currently, the electrolyte injection holes on battery casings are generally cylindrical through-hole structures. During electrolyte injection, the electrolyte directly washes over the battery cell components, which can easily cause problems such as active materials falling off the electrode plates or the separator folding, thus affecting the performance of the battery cell.

[0023] Based on this, this utility model proposes an insulating component to solve the problem that, during electrolyte injection, the electrolyte will wash away the battery cell assembly inside the battery. Specifically, Figures 1 to 4 A schematic diagram of the structure of the insulating component provided by this utility model; Figures 5 to 6 A schematic diagram of the structure of the cover plate assembly provided by this utility model; Figure 7 A schematic diagram of the structure of the battery cell provided by this utility model.

[0024] See Figure 1 and Figure 5 In one embodiment of the present invention, the insulating member 100 includes an insulating body 110 and a flow guiding structure 120. The insulating body 110 has a first mounting side 112 in its thickness direction. The insulating body 110 is provided with a through hole 111. The flow guiding structure 120 is disposed on the first mounting side 112. The flow guiding structure 120 is connected to the insulating body 110 and spans across the through hole 111. An outlet 125 is formed on the insulating member 100, communicating with the through hole 111 and arranged laterally along the through hole 111. The outlet 125 is formed on the flow guiding structure 120, and / or the outlet 125 is defined between the insulating body 110 and the flow guiding structure 120.

[0025] It should be noted that the insulating component 100 is a component made of insulating material, mainly used to isolate the battery casing 300 from the battery cell assembly inside the battery. The through hole 111 is provided corresponding to the electrolyte injection hole 400 on the battery so that the electrolyte injected from the electrolyte injection hole 400 can flow through the insulating body 110 to the flow guiding structure 120. Its shape can be various, for example, it can be circular or rectangular, etc. Some embodiments provided in this application do not limit this.

[0026] It should also be noted that the shape of the liquid outlet 125 can be varied, for example, it can be circular or rectangular, etc. Some embodiments provided in this application do not limit this. Furthermore, the liquid outlet 125 is formed on the flow guiding structure 120, meaning that the liquid outlet 125 is formed solely by the flow guiding structure 120. For example, when the flow guiding structure 120 is a flow guide tube, the liquid outlet 125 is the outlet of the flow guide tube. The liquid outlet 125 is defined between the insulating body 110 and the flow guiding structure 120, meaning that the liquid outlet 125 is jointly formed by the flow guiding structure 120, specifically as follows... Figure 1 and Figure 2 As shown. The outlet 125 is formed on the flow guiding structure 120, and / or the outlet 125 is defined between the insulating body 110 and the flow guiding structure 120. This means that the outlet 125 can be formed solely on the flow guiding structure 120, or it can be defined between the insulating body 110 and the flow guiding structure 120, or it can be formed on the flow guiding structure 120 and defined between the insulating body 110 and the flow guiding structure 120. Some embodiments provided in this application do not limit this. Specifically, the outlet 125 is arranged laterally along the through hole 111, meaning that the outlet 125 is arranged laterally toward the through hole 111 so that the electrolyte can flow out of the outlet 125 laterally along the through hole 111. For example, when the through hole 111 extends vertically, the lateral direction of the through hole 111 is horizontal.

[0027] In the technical solution of this utility model, by setting a through hole 111, the electrolyte injected from the injection hole 400 can pass through the insulating body 110 and flow to the flow guiding structure 120. By setting the flow guiding structure 120, the electrolyte flowing axially along the through hole 111 is guided to flow laterally through the through hole 111. This avoids the electrolyte directly washing over the battery cell assembly when injecting electrolyte into the battery, thereby reducing the probability of problems such as active material shedding or separator flipping in the cell assembly. This helps to improve the stability of battery performance and solves the problem that the electrolyte washes over the battery cell assembly when injecting electrolyte through the existing injection hole 400.

[0028] Please refer to some embodiments provided in this utility model. Figure 2 and Figure 3The flow guiding structure 120 includes a first baffle 121 extending along a second direction. The first baffle 121 extends through a first connecting plate portion 122 to the edge of the through hole 111 to define a first liquid outlet 1251 between the first baffle 121 and the insulating body 110. The liquid outlet 125 includes the first liquid outlet 1251. Thus, by providing the first baffle 121, the through hole 111 is blocked, and together with the insulating body 110, the first liquid outlet 1251 distributed laterally along the through hole 111 is defined to guide the electrolyte injected axially along the through hole 111 to flow laterally into the battery along the through hole 111.

[0029] It is understood that the first baffle 121 and the first connecting plate portion 122 can be formed in various ways. For example, they can be integrally formed or separately formed. Some embodiments provided in this application do not limit this.

[0030] For further information, please refer to [link / reference]. Figure 2 and Figure 3 The first baffle 121 has a through hole extending in a first direction. The flow guiding structure 120 also includes a second baffle 123. The second baffle 123 is connected to the edge of the through hole of the first baffle 121 via a second connecting plate portion 124, thereby defining a second liquid outlet 1252 between the first baffle 121 and the second baffle 123. The liquid outlet 125 includes the second liquid outlet 1252. Thus, by providing the through hole, the electrolyte can continue to flow axially along the through hole 111, and by providing the second baffle... Plate 123 is used to block the connecting hole and, together with the first flow guiding structure 120, defines a second liquid outlet 1252 distributed laterally along the through hole 111, so that the first liquid outlet 1251 and the second liquid outlet 1252 can be distributed along the axial direction of the through hole 111, so that the flow guiding structure 120 has a certain depth, so that the electrolyte can flow a certain distance along the axial direction of the through hole 111 within the flow guiding structure 120, which can both buffer the impact of the electrolyte on the first baffle 121 and facilitate the electrolyte to flow out through the liquid outlet 125.

[0031] It is understood that the second baffle 123 and the second connecting plate portion 124 can be formed in various ways. For example, they can be integrally formed or separately formed. Some embodiments provided in this application do not limit this. Furthermore, the first connecting plate portion 122 and the second connecting plate portion 12 can be integrally formed or separately formed. Some embodiments provided in this application do not limit this.

[0032] The specific shape of the insulating body 110 is not limited, and it can be rectangular, elongated, or other shapes. In some embodiments, the insulating body 110 is rectangular, so that the insulating body 110 has a length direction and a width direction.

[0033] Based on the above embodiments, please refer to Figure 1 and Figure 5 The liquid outlet 125 of the insulating component 100 is arranged along the width direction of the insulating body 110 so that the liquid outlet 125 can avoid the pressure relief structure 230, so as to prevent the pressure relief structure 230 from being washed by the electrolyte, thereby eliminating the need for additional protective measures for the pressure relief structure 230.

[0034] In another embodiment of the present invention, the liquid outlet 125 of the insulating member 100 is arranged along the length direction of the insulating body 110 so that the liquid outlet 125 can avoid the electrode assembly inside the battery, thereby reducing the probability of electrolyte scouring the electrode assembly.

[0035] Furthermore, the number of liquid outlets 125 can be one or more, and some embodiments provided in this application do not limit this. Specifically, in this embodiment, two liquid outlets 125 are provided, which are distributed laterally along the through hole 111 and face away from each other. In this way, by providing two liquid outlets 125 facing away from each other, the electrolyte can be quickly diverted laterally along the through hole 111 to prevent electrolyte accumulation, thereby facilitating the rapid injection of electrolyte.

[0036] Please refer to some embodiments provided in this application. Figure 4 The first mounting side 112 of the insulating body 110 is provided with a limiting protrusion 130. The height of the limiting protrusion 130 is H1, and the height of the current guiding structure 120 is H2, wherein H1≥H2. In this way, by setting the limiting protrusion 130, the movement of the cell assembly inside the battery is restricted. At the same time, the height of the current guiding structure 120 is not higher than the limiting protrusion, so that the current guiding structure 120 can be hidden inside the limiting protrusion. On the one hand, this avoids interference with other structures inside the battery, and on the other hand, it facilitates electrolyte injection.

[0037] Furthermore, some embodiments of this application also provide a cover plate assembly 200, which includes a cover body 210 and an insulating member 100. The cover body 210 is provided with an injection hole 400, and the insulating member 100 is disposed on the cover body 210. The through hole 111 of the insulating member 100 is connected to the injection hole 400. In this way, by setting the injection hole 400 on the cover body 210, the electrolyte can be injected vertically directly from the top of the battery without adjusting the orientation of the housing 300, thereby facilitating electrolyte injection.

[0038] It should be noted that the specific structure of the insulating component 100 is as described in the above embodiments. Since the cover plate assembly 200 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0039] Please see Figure 5 and Figure 6 The cover 210 is also provided with a terminal post 220 and a pressure relief structure 230. The pressure relief structure 230 and the flow guiding structure 120 are spaced apart along the length of the cover 210. Thus, the terminal post 220 is provided to connect to an external power device, and the pressure relief structure 230 is provided to prevent the pressure inside the battery from being released in time.

[0040] Since the flow guiding structure 120 needs to change the flow direction of the electrolyte, making it difficult for the electrolyte to flow out, therefore, in this embodiment, please refer to... Figure 4 and Figure 6 The cross-sectional area of ​​the injection hole 400 is S1, the cross-sectional area of ​​the first outlet port 1251 is S2, and the cross-sectional area of ​​the second outlet port 1252 is S3, wherein S2+S3≥S1. This ensures that the electrolyte injected from the injection hole 400 can flow out of the guide structure 120 in a timely manner, so as to prevent the electrolyte from accumulating in the guide structure 120 due to fluid diversion, thereby facilitating electrolyte injection.

[0041] Some embodiments of this application also provide a battery cell 1000, which includes a housing 300 and a cover assembly 200, the cover assembly 200 covering the open end of the housing 300. The specific structure of the cover assembly 200 is the same as described in the above embodiments. Since this battery cell 1000 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0042] In addition, please refer to some embodiments provided in this application. Figure 1 and Figure 7The battery cell 1000 includes a housing 300 and an insulating component 100. The side wall of the housing 300 is provided with a liquid injection hole 400. The insulating component 100 is disposed inside the housing 300. The through hole 111 of the insulating component 100 is connected to the liquid injection hole 400. In this way, the liquid injection hole 400 is disposed on the housing 300. On the one hand, since the cover 210 is provided with structures such as the terminal post 220, placing the liquid injection hole 400 on the housing 300 can avoid occupying the space on the cover 210, which is conducive to the miniaturization of the cover 210. On the other hand, it can avoid the difficulty of liquid injection caused by insufficient space at the top of the battery cell.

[0043] It is understood that the specific structure of the insulating component 100 refers to the above embodiments. Since the battery cell 1000 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0044] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An insulating component, characterized in that, The insulating component includes: An insulating body having a first mounting side in its thickness direction, the insulating body having a through hole; and... A flow guiding structure is provided on the first mounting side, the flow guiding structure is connected to the insulating body, and spans across the through hole; A liquid outlet is formed on the insulating element, communicating with the through hole and arranged laterally along the through hole. The liquid outlet is formed on the flow guiding structure, and / or the liquid outlet is defined between the insulating body and the flow guiding structure.

2. The insulating component as described in claim 1, characterized in that, The flow guiding structure includes a first baffle extending laterally along the through hole. The first baffle is connected to the edge of the through hole via a first connecting plate portion to define a first liquid outlet between the first baffle and the insulating body. The liquid outlet includes the first liquid outlet.

3. The insulating component as described in claim 2, characterized in that, The first baffle has a through hole extending axially along the through hole. The flow guiding structure also includes a second baffle. The second baffle is connected to the edge of the through hole of the first baffle through a second connecting plate to define a second liquid outlet between the first baffle and the second baffle. The liquid outlet includes the second liquid outlet.

4. The insulating component as described in claim 1, characterized in that, The liquid outlet is arranged along the width direction of the insulating body; or, The liquid outlet is arranged along the length of the insulating body.

5. The insulating component as described in claim 1, characterized in that, Two liquid outlets are provided, both of which are distributed laterally along the through hole, and the two liquid outlets face opposite directions.

6. The insulating component as described in claim 5, characterized in that, The first mounting side of the insulating body is provided with a limiting protrusion, the height of the limiting protrusion is H1, and the height of the flow guiding structure is H2, wherein H1≥H2.

7. A cover plate assembly, characterized in that, The device includes a cover and an insulating element as described in any one of claims 1 to 6, wherein the cover has an injection hole, the insulating element is disposed on the cover, and the through hole of the insulating element is connected to the injection hole.

8. The cover plate assembly as claimed in claim 7, characterized in that, The flow guiding structure includes a first baffle extending laterally along the through hole. The first baffle is connected to the edge of the through hole via a first connecting plate portion to define a first liquid outlet between the first baffle and the insulating body. A through hole extending axially along the through hole is provided on the first baffle. The flow guiding structure also includes a second baffle. The second baffle is connected to the edge of the through hole of the first baffle through a second connecting plate to define a second liquid outlet between the first baffle and the second baffle. The cross-sectional area of ​​the injection hole on the side of the cover facing the insulating component is S1, the cross-sectional area of ​​the first liquid outlet is S2, and the cross-sectional area of ​​the second liquid outlet is S3, wherein S2+S3≥S1.

9. A single battery cell, characterized in that, It includes a housing and a cover assembly as described in claims 7 to 8, the cover assembly covering the open end of the housing.

10. A single battery cell, characterized in that, The device includes a housing and an insulating member as described in any one of claims 1 to 6, wherein the side wall of the housing is provided with a liquid injection hole, the insulating member is disposed inside the housing, and the through hole of the insulating member is connected to the liquid injection hole.

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