CN220306359U - Edge sealing structure of soft package battery, battery cell and battery module - Google Patents
Edge sealing structure of soft package battery, battery cell and battery module Download PDFInfo
- Publication number
- CN220306359U CN220306359U CN202321814371.4U CN202321814371U CN220306359U CN 220306359 U CN220306359 U CN 220306359U CN 202321814371 U CN202321814371 U CN 202321814371U CN 220306359 U CN220306359 U CN 220306359U
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- Prior art keywords
- battery
- edge sealing
- edge
- sealing
- soft
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- 238000007789 sealing Methods 0.000 title claims abstract description 71
- 239000007788 liquid Substances 0.000 abstract description 8
- 230000001788 irregular Effects 0.000 abstract description 4
- 239000003792 electrolyte Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model discloses a sealing structure of a soft-package battery, which comprises a first side sealing edge positioned at the upper part, a second side sealing edge positioned at the lower part and a tab sealing edge positioned near a tab, wherein the first side sealing edge is positioned at the upper part of the battery; at least one groove structure is arranged on the inner side of the first side edge sealing, so that a guide runner is formed on the inner side of the first side edge sealing. The edge sealing structure of the soft-package battery is designed to be an irregular structure on the basis of meeting the minimum edge sealing distance of the soft-package battery, and the structure mainly comprises one or more sections of groove structures, but the edge sealing distance is required to meet the minimum requirement. When the battery is inflated or pressure is required to be released, the design of the structure is used as a potential flow channel in the soft package battery, so that gas and liquid are guided to flow in the designed direction, and the function of the flow channel in the square shell battery can be achieved to a certain extent.
Description
Technical Field
The utility model belongs to the technical field of batteries, relates to a soft-package battery, and in particular relates to an edge sealing structure of the soft-package battery, an electric core and a battery module.
Background
The soft package battery mainly uses an aluminum plastic film as the outer surface of the battery core, and is internally provided with a positive plate, a negative plate diaphragm, electrolyte and the like. The process after the battery is injected and formed is final sealing. The current final seal is generally in a regular shape along the edge of the battery cell, and common modes comprise a single-side seal and two-side seals, wherein the polar edge and the side seal are consistent.
The edge sealing structure of the soft-package battery is in a regular shape, the final sealing state of the edge sealing of the electrode lug is the same as that of the side edge sealing, the battery cell is inflated due to chemical reaction, the position of exhaust is random, and the risk of leakage of liquid from the electrode lug is high.
Because of some reasons, the single-package battery is in thermal runaway, no exhaust channel exists in the soft-package battery core, high-temperature gas can be discharged from the edge sealing randomly, and if the high-temperature gas cannot be discharged from the exhaust hole of the module effectively in time, internal short circuit is easy to occur or heat diffusion of more batteries is caused.
If the edge sealing size exceeds the deviation, the space for adjusting or flowing the electrolyte and the like in the edge sealing is limited, and the plastic-aluminum film is easy to cause the phenomenon of false sealing, so that the yield is reduced.
Disclosure of Invention
In order to solve the technical problems of the heating system of the current power battery, the utility model firstly provides a sealing structure of the soft-package battery, wherein the sealing structure of the soft-package battery is designed to be an irregular structure on the basis of meeting the minimum sealing distance of the soft-package battery, and the structure mainly comprises one or more sections of groove structures, but the sealing distance needs to meet the minimum requirement. When the battery is inflated or pressure is required to be released, the design of the structure is used as a potential flow channel in the soft package battery, so that gas and liquid are guided to flow in the designed direction, and the function of the flow channel in the square shell battery can be achieved to a certain extent.
The utility model further provides an electric core comprising the edge sealing structure.
The utility model finally provides a battery module comprising the battery cell.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the utility model provides a sealing structure of a soft-package battery, which comprises a first sealing edge positioned at the upper part, a second side sealing edge positioned at the lower part and a tab sealing edge positioned near a tab; at least one groove structure is arranged on the inner side of the first sealing edge, so that a guide runner is formed on the inner side of the first sealing edge.
In the technical scheme, the edge sealing of the soft-package battery is designed to be of an irregular structure on the basis of meeting the minimum edge sealing distance of the soft-package battery, and the structure mainly comprises one or more sections of groove structures, but the edge sealing distance is required to meet the minimum requirement. The design of the edge sealing structure is used as a potential flow passage in the soft package battery when the battery is inflated or pressure release is needed, so that gas and liquid are guided to flow in the designed direction, and the function of the flow passage in the square shell battery can be achieved to a certain extent.
As a preferable mode of the utility model, the cross section of the groove structure is rectangular with one end open.
As a preferable mode of the utility model, the cross section of the groove structure is a triangle with one open end.
As a preferable scheme of the utility model, the cross section of the groove structure is a truncated cone shape with one end open.
As a preferable scheme of the utility model, the maximum depth of the groove structure is less than or equal to half of the first edge sealing.
The utility model further provides a battery cell which comprises a positive electrode, a negative electrode, a diaphragm, a lug and the edge sealing structure.
The utility model finally provides a battery module, which comprises at least more than one electric core.
As a preferable scheme of the utility model, the battery module is provided with the vent hole, and the position of the edge sealing structure corresponds to the position of the vent hole.
Compared with the prior art, the utility model has the following beneficial effects:
1) Because the soft-package battery cannot design an exhaust channel, compared with the sealing mode of the conventional soft-package battery, the irregular structure added by the utility model can be used as a hidden flow channel in the soft-package battery, and can be used for guiding the redundant gas or liquid in the battery to be discharged to a certain extent to a design method.
2) The module shell is provided with the exhaust structure, the position of the exhaust structure corresponds to the region of the soft package battery with the increased groove structure, and if thermal runaway occurs in the battery, high-temperature gas can rapidly break through along the region with the increased groove and be released from the exhaust hole of the module, so that the speed of thermal diffusion is slowed down.
3) The edge sealing structure can be used as a buffer space for flowing of internal electrolyte to a certain extent, so that the occurrence of false sealing phenomenon is reduced or prevented, and the yield is improved.
4) According to the utility model, on the basis of ensuring the minimum edge sealing distance and edge sealing force, a buffer space is provided for the flowing of electrolyte, the occurrence of false sealing of the battery core is reduced, a groove structure is increased, the flow channel of the soft-package battery core is potentially increased, the flowing direction of gas or liquid required to be released in the battery is positively guided, the risk of internal short circuit is reduced, the battery module is provided with the exhaust hole, the exhaust hole corresponds to the edge sealing structure area of the groove of the soft-package battery core, and when the battery core is in thermal runaway, the high-temperature gas can quickly find the potential flow channel to be released outside the module, the thermal spread of the value is slowed down or prevented, and the safety of the battery is greatly improved.
Drawings
Fig. 1 is a schematic diagram of example 1.
Fig. 2 is a schematic diagram of example 2.
Fig. 3 is a schematic diagram of example 3.
Fig. 4 is a schematic view of a battery module.
In the figure, 1. A first edge banding; 2. a second edge seal; 3. edge sealing of the polar lugs; 4. a tab; 5. a groove structure; 6. an exhaust hole structure; 7. and a battery module.
Detailed Description
For a further understanding of the present utility model, the present utility model will be described in detail with reference to the drawings and examples.
The present application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be noted that, for convenience of description, only the portions related to the utility model are shown in the drawings. The first, second, etc. words are provided for convenience in describing the technical scheme of the present utility model, and have no specific limitation, and are all generic terms, and do not constitute limitation to the technical scheme of the present utility model. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. The technical schemes in the same embodiment and the technical schemes in different embodiments can be arranged and combined to form a new technical scheme without contradiction or conflict, which is within the scope of the utility model.
Example 1
Referring to fig. 4, the battery module provided in this embodiment includes a battery module 7 body, a plurality of vent structures 6 are disposed on the battery module 7, and each vent structure 6 corresponds to the groove structure 5 of the edge sealing structure.
Referring to fig. 4, the above-mentioned groove structure 5 is formed on the edge sealing structure of the soft-pack battery, and includes a first edge sealing 1 located at the upper portion, a second edge sealing 2 located at the lower portion, and tab edge sealing 3 located at both sides, where a rectangular groove structure 5 with an open end is provided at the inner side of the first edge sealing 1, and the design of the groove structure 5 is used as a potential flow channel inside the soft-pack battery when the battery is inflated or pressure needs to be released, so as to guide gas and liquid to flow in the designed direction, and to a certain extent, the function of the flow channel in the square-shell battery can be achieved.
Example 2
Referring to fig. 2, this embodiment is substantially the same as embodiment 1, except that the cross section of the groove structure 5 is a triangle with one end open.
Example 3
Referring to fig. 3, this embodiment is substantially the same as embodiment 1, except that the cross section of the groove structure 5 is in the shape of a truncated cone with one end open.
According to the utility model, on the basis of ensuring the minimum edge sealing distance and edge sealing force, a buffer space is provided for the flowing of electrolyte, the occurrence of false sealing of the battery core is reduced, a groove structure is increased, the flow channel of the soft-package battery core is potentially increased, the flowing direction of gas or liquid required to be released in the battery is positively guided, the risk of internal short circuit is reduced, the battery module is provided with the exhaust hole, the exhaust hole corresponds to the edge sealing structure area of the groove of the soft-package battery core, and when the battery core is in thermal runaway, the high-temperature gas can quickly find the potential flow channel to be released outside the module, the thermal spread of the value is slowed down or prevented, and the safety of the battery is greatly improved.
The utility model and its embodiments have been described above by way of illustration and not limitation, and the utility model is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present utility model.
Claims (8)
1. The edge sealing structure of the soft-package battery is characterized by comprising a first edge sealing at the upper part, a second edge sealing at the lower part and a tab edge sealing near the tab; at least one groove structure is arranged on the inner side of the first sealing edge, so that a guide runner is formed on the inner side of the first sealing edge.
2. The edge sealing structure of a flexible battery according to claim 1, wherein the cross section of the groove structure is rectangular with one open end.
3. The edge sealing structure of a flexible battery according to claim 1, wherein the cross section of the groove structure is triangular with one end open.
4. The edge sealing structure of a soft package battery according to claim 1, wherein the cross section of the groove structure is in a truncated cone shape with one end open.
5. The edge sealing structure of a pouch cell as defined in any one of claims 1-4, wherein the groove structure has a maximum depth of less than or equal to half of the first edge sealing.
6. An electrical core comprising a positive electrode, a negative electrode, a diaphragm, a tab and the edge sealing structure of any one of claims 1-5.
7. A battery module comprising at least one or more cells according to claim 6.
8. The battery module of claim 7, wherein the battery module is provided with an exhaust hole, and the position of the edge sealing structure corresponds to the position of the exhaust hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321814371.4U CN220306359U (en) | 2023-07-11 | 2023-07-11 | Edge sealing structure of soft package battery, battery cell and battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321814371.4U CN220306359U (en) | 2023-07-11 | 2023-07-11 | Edge sealing structure of soft package battery, battery cell and battery module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220306359U true CN220306359U (en) | 2024-01-05 |
Family
ID=89348532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321814371.4U Active CN220306359U (en) | 2023-07-11 | 2023-07-11 | Edge sealing structure of soft package battery, battery cell and battery module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220306359U (en) |
-
2023
- 2023-07-11 CN CN202321814371.4U patent/CN220306359U/en active Active
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