CN210668438U - Battery cover plate and battery assembly - Google Patents
Battery cover plate and battery assembly Download PDFInfo
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- CN210668438U CN210668438U CN201921585895.4U CN201921585895U CN210668438U CN 210668438 U CN210668438 U CN 210668438U CN 201921585895 U CN201921585895 U CN 201921585895U CN 210668438 U CN210668438 U CN 210668438U
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- explosion
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- hole
- battery cover
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- 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
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Abstract
The utility model discloses a battery cover plate and battery pack, include: the base plate is provided with an explosion-proof hole and a liquid injection hole which penetrate through the upper surface and the lower surface of the base plate; the explosion-proof valve is arranged in the explosion-proof hole; and the liquid injection hole cover is connected with the liquid injection hole in a sealing way. The utility model discloses a only set up explosion-proof hole and annotate the liquid hole on the base plate, explosion-proof valve with annotate the liquid hole lid respectively with explosion-proof hole with annotate liquid hole sealing connection, realize the simple structure of battery apron, easily preparation, the processing cost is low.
Description
Technical Field
The utility model relates to a lithium ion battery field, more specifically relates to a battery apron and battery pack for lithium ion battery.
Background
Lithium ion batteries have gained wide attention due to many advantages, and not only can be used as a power source of various portable devices, but also can be used as one of core components of hybrid vehicles and pure electric vehicles, and the safety performance of the lithium ion batteries is increasingly emphasized by automobile manufacturers and battery manufacturers. Along with the development of the industry, people pay more and more attention to the use safety, the manufacturing convenience and the cost controllability of the lithium battery.
Because the battery cover plate needs to have safety indexes such as water resistance, insulation, explosion prevention and the like, too many assemblies are integrated on the existing lithium battery cover plate, the battery cover plate structure is complex, the battery cover plate structure and the manufacturing process are complex, and the defects of electrolyte leakage risk and high manufacturing cost exist.
Therefore, it is necessary to provide a battery cover plate with simple structure, easy manufacturing, low processing cost and higher safety.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a battery cover plate realizes that simple structure, easily preparation, processing cost are low, the security is higher.
In order to achieve the above object, the utility model provides a battery cover plate, include:
the base plate is provided with an explosion-proof hole and a liquid injection hole which penetrate through the upper surface and the lower surface of the base plate;
the explosion-proof valve is arranged in the explosion-proof hole;
and the liquid injection hole cover is connected with the liquid injection hole in a sealing way.
Optionally, the liquid injection hole comprises a groove and a through hole, the groove is formed on the upper surface of the substrate, and the through hole penetrates through the bottom wall of the groove and the lower surface of the substrate, wherein the diameter of the through hole is 1mm to 10 mm.
Optionally, the liquid injection hole cover comprises a cover cap matched with the groove and a hole plug matched with the through hole, one side surface of the cover cap is an adhesion surface, and the hole plug is arranged on the adhesion surface.
Optionally, the bonding surface and the groove are bonded by a sealant.
Optionally, the explosion-proof valve is sheet-shaped and is integrally formed with the substrate through an injection molding process, and the edge of the explosion-proof valve is embedded in the side wall of the explosion-proof hole.
Optionally, the upper surface of the explosion-proof valve is provided with a notch, and the depth of the notch is 0.1mm to 2 mm.
Optionally, the explosion-proof valve is provided with a protective film, and the protective film is bonded with the upper surface of the explosion-proof valve.
Optionally, the thickness of the substrate is 0.5mm to 10mm, and the thickness of the explosion-proof valve is 0.5mm to 2 mm.
Optionally, the substrate and the liquid injection hole cover are made of polypropylene or polyethylene.
Optionally, the material of the explosion-proof valve is polypropylene, polyethylene or metal, and the metal includes at least one of aluminum, copper and nickel.
The utility model also provides a battery pack, include: the battery comprises a battery shell, two polar columns for leading out electrodes and the battery cover plate; the battery shell is provided with a bottom wall and a side wall, and the side wall forms an opening matched with the battery cover plate at the top of the battery shell; the battery cover plate is hermetically connected with the opening, the battery shell and the battery cover plate enclose a sealed cavity, and the cavity is used for containing electrolyte; the utmost point post set up in the top of lateral wall, utmost point post runs through the lateral wall and with lateral wall sealing connection.
The beneficial effects of the utility model reside in that:
(1) the utility model discloses a battery cover plate is through only setting up explosion-proof hole and annotating the liquid hole on the base plate, explosion-proof valve with annotate the liquid hole lid respectively with explosion-proof hole with annotate liquid hole sealing connection, realize the simple structure of battery cover plate, easily preparation, the processing cost is low, reveal the risk little, use safelyr.
Further, annotate liquid hole and explosion-proof valve simple structure and further simplified the structure of battery apron to reduce the manufacturing degree of difficulty and manufacturing cost, explosion-proof valve and base plate realize sealed effect through injection molding process integrated into one piece when simplifying connection structure, can strengthen the explosion-proof sensitivity of battery through set up the nick on explosion-proof valve surface, use safelyr.
(2) The utility model discloses a battery pack compares with traditional battery pack, draw forth structure (utmost point post) with comparatively complicated battery electrode and set up on battery case's lateral wall upper portion, the structure of battery apron has been simplified, the installation region of utmost point post on the casing compares in battery apron alternative more and the installation of being convenient for more, the too much relevant subassembly of integration on having avoided the battery apron for battery apron's structure is succinct more, easily preparation, the holistic manufacturing degree of difficulty of battery pack has been reduced, can improve production efficiency and be of value to the saving cost.
The apparatus of the present invention has other features and advantages which will be apparent from or are set forth in more detail in the accompanying drawings and the following detailed description, which are incorporated herein, and which together serve to explain certain principles of the invention.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments of the present invention with reference to the attached drawings, in which like reference numerals generally represent like parts.
Fig. 1 shows a schematic structural diagram of a battery cover plate according to an embodiment of the present invention.
Fig. 2 shows a schematic view of a liquid injection orifice cover according to an embodiment of the invention.
Fig. 3 shows a schematic diagram of a battery assembly according to an embodiment of the present invention.
Description of reference numerals:
1. a substrate; 2. a liquid injection hole; 3. an explosion-proof valve; 4. a liquid injection hole cover; 5. a protective film; 6. capping; 7. a hole plug; 8. an explosion-proof hole; 9. a groove; 10. through holes; 11. scoring; 12. a housing; 13. a pole column; 100. a battery cover plate; 200. a battery pack is provided.
Detailed Description
The invention will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present invention have been illustrated in the accompanying drawings, it is to be understood that the invention may be embodied in various forms and should not be 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 invention to those skilled in the art.
Fig. 1 shows a schematic structural diagram of a battery cover plate according to an embodiment of the present invention, and as shown in fig. 1, the battery cover plate 100 includes:
the liquid injection device comprises a substrate 1, wherein the substrate 1 is provided with an explosion-proof hole 8 and a liquid injection hole 2 which penetrate through the upper surface and the lower surface of the substrate 1; the explosion-proof valve 3 is arranged in the explosion-proof hole 8; and the liquid injection hole cover 4 is connected with the liquid injection hole 2 in a sealing way.
Specifically, only set up one explosion-proof hole 8 that is used for installing explosion-proof valve 3 on base plate 1 and one and be used for pouring into notes liquid hole 2 of electrolyte into, can satisfy the explosion-proof of power battery group and pour into the demand of electrolyte into, can seal through notes liquid handhole door 4 and prevent that electrolyte from leaking annotating liquid hole 2 after the battery is annotated and is accomplished, this battery apron's simple structure, easily preparation and processing cost are low.
In one example, the liquid injection hole 2 comprises a groove 9 and a through hole 10, the groove 9 is formed on the upper surface of the substrate 1, the through hole 10 penetrates through the bottom wall of the groove 9 and the lower surface of the substrate 1, and the diameter of the through hole 10 is 1mm to 10 mm.
Specifically, the liquid injection hole 2 is formed with a groove 9 on the upper surface of the substrate 1, a through hole 10 is formed between the bottom of the groove 9 and the lower surface of the substrate 1, and an electrolyte can be injected into the power battery (lithium battery) through the through hole 10. The grooves 9 and the through holes 10 in this embodiment are both circular, and the through holes 10 and the grooves 9 are concentric circles.
In one example, the liquid injection hole cover 4 comprises a cover cap 6 matched with the groove 9 and a hole plug 7 matched with the through hole 10, one side surface of the cover cap 6 is an adhesion surface, and the hole plug 7 is arranged on the adhesion surface.
Specifically, the lid cap 6 and the plug 7 of the pour hole lid 4 are capable of sealing the pour hole 2 in cooperation with the recess 9 and the through hole 10 of the pour hole 2, respectively. The cap 6 and the plug 7 of the pour hole lid 4 in this embodiment are also circular, and the plug 7 is located at the center of the bonding surface of the cap 6.
In one example, the bonding surface is bonded to the recess 9 by a sealant.
Specifically, can be through annotating sealed glue at the face coating that bonds, annotate the liquid back that liquid was accomplished at the battery, will annotate liquid hole lid 4 lid on annotating liquid hole 2, it is fixed with recess 9 bonding through the face of bonding (lower surface promptly) of block 6, guarantee to annotate liquid hole 2 and annotate leakproofness and the fastness between liquid hole lid 4, avoid electrolyte to leak. Alternatively, after the cap 6 and the groove 9 are bonded, the joint between the sidewall of the cap 6 and the sidewall of the groove 9 (the gap formed between the cap 6 and the groove 9 on the surface of the substrate 1) may be reinforced by laser welding, or the cap 6 and the groove 9 may be directly welded by laser welding without using a sealant to perform reinforcement and sealing. Meanwhile, the thickness of the cap 6 is equal to the depth of the groove 9, so that the flatness of the upper surface of the substrate 1 can be ensured while the strength of the liquid injection hole cover 4 is ensured, and the mounting and the sealing connection are convenient.
In this embodiment, the explosion-proof valve 3 is sheet-shaped and is integrally formed with the substrate 1 through an injection molding process, and the edge of the explosion-proof valve 3 is embedded in the side wall of the explosion-proof hole 8.
Specifically, the explosion-proof valve 3 has certain gas permeability and waterproof property, can guarantee the inside and outside atmospheric pressure balance of battery shell when the battery normally works, and when the battery work is abnormal and gas is produced and the pressure is too big in the battery or the casing, timely exhaust gas prevents the explosion that the battery atmospheric pressure too high leads to. Explosion-proof valve 3 in this embodiment is the diaphragm structure of rectangle and with the integrative injection moulding of base plate 1, can make the edge parcel of explosion-proof hole 8 on the base plate 1 live the edge of explosion-proof valve 3, has effectively guaranteed the fastness between explosion-proof valve 3 and the base plate 1, can promote the safe effect of explosion-proof valve 3. The utility model discloses an in other embodiments, other types or models also can be adopted to explosion-proof valve 3, and the kind of explosion-proof valve 3 can be selected by oneself to the concrete demands such as waterproof grade, ventilative volume, explosion-proof pressure, temperature range according to the battery by technical personnel in the field, and it is no longer repeated here.
In one example, the upper surface of the explosion-proof valve 3 is provided with a notch 11, and the depth of the notch 11 is 0.1mm to 2 mm. Specifically, as shown in fig. 1, the upper surface of the explosion-proof valve 3 in this embodiment is provided with two crossed notches 11 with a certain depth, the depth of the notches 11 should not exceed the thickness of the explosion-proof valve 3, the notches 11 can improve the sensitivity of the explosion-proof valve 3, and when the battery is abnormal, a large amount of gas is generated in the housing in a short time and the pressure is too large, the explosion-proof valve 3 can be rapidly cracked from the notches 11, and the gas is discharged in time to avoid explosion. In other embodiments of the present invention, the anti-explosion valve 3 may not be provided with the notch 11, and those skilled in the art may select whether to provide the notch 11 according to actual requirements.
In one example, the explosion-proof valve 3 is provided with a protective film 5, and the protective film 5 is bonded to the upper surface of the explosion-proof valve 3. Specifically, the protection film 5 is arranged on the upper surface of the explosion-proof valve 3, so that the explosion-proof valve 3 can be prevented from being polluted or damaged by external force, and the safety and the reliability of the explosion-proof valve 3 are ensured. In other embodiments of the present invention, the protective film 5 may not be provided, and those skilled in the art may select whether to provide the protective film 5 according to the specific installation environment of the driving battery.
In one example, the thickness of the base plate 1 is 0.5mm to 10mm, and the thickness of the explosion-proof valve 3 is 0.5mm to 2 mm. Specifically, the thickness of the explosion-proof valve 3 should be smaller than that of the substrate 1, and the thickness ratio of the explosion-proof valve 3 to the substrate 1 can be selected according to actual requirements.
In one example, the material of the substrate 1 and the liquid injection hole cover 4 is polypropylene or polyethylene. Specifically, the base plate 1 and the liquid injection hole cover 4 made of polypropylene or polyethylene can effectively ensure the insulation property of the battery cover plate and improve the corrosion resistance to the electrolyte.
In one example, the material of the explosion-proof valve 3 is polypropylene, polyethylene or metal, and the metal includes at least one of aluminum, copper and nickel. Specifically, the material of the explosion-proof valve may be plastic or metal, the plastic is polypropylene, polyethylene, or the like, the metal may be aluminum, copper, nickel, or an alloy thereof, and a person skilled in the art may select the explosion-proof material as the metal or the plastic according to the actual explosion-proof level requirement, which is not described herein again.
Above-mentioned embodiment is through only setting up explosion-proof hole 8 and annotating liquid hole 2 on base plate 1, explosion-proof valve 3 and annotate liquid hole lid 4 respectively with explosion-proof hole 8 with annotate liquid hole 2 sealing connection, realize the simple structure of battery apron, easily preparation, the processing cost is low, compares with traditional battery apron, has removed comparatively complicated battery electrode and has drawn forth the structure from, and reveals the risk little, uses safelyr. Annotate liquid hole 2 and explosion-proof valve 3 simple structure and further simplified the structure of battery apron to reduce the manufacturing degree of difficulty and manufacturing cost, explosion-proof valve 3 and base plate 1 realize sealed effect through injection molding process integrated into one piece when simplifying connection structure, can strengthen the explosion-proof sensitivity of battery through set up the nick on explosion-proof valve 3 surfaces, use safelyr.
Fig. 3 shows a schematic diagram of a battery assembly according to an embodiment of the present invention, the battery assembly 200 comprising: a battery shell 12, two poles 13 for electrode extraction, and the battery cover plate 100; the battery case 12 has a bottom wall and a side wall forming an opening at the top of the battery case 12 for fitting with the battery cap plate 100; the battery cover plate 100 is hermetically connected with the opening, and the battery shell 12 and the battery cover 100 enclose a closed cavity for containing electrolyte; utmost point post 13 set up in the top of lateral wall, utmost point post 13 run through the lateral wall and with lateral wall sealing connection.
Specifically, compared with the existing battery assembly, in the battery assembly 200 of the present embodiment, the terminal posts (two positive and negative electrodes for respectively leading out the battery) for leading out the battery electrode are disposed on the upper portion of the sidewall of the battery housing 12, and the space of the battery housing 12 is large, so that the terminal posts leading out the battery electrode are mounted on the housing 12, and are more selective and more convenient to mount than the mounting area mounted on the battery cover plate 100, thereby avoiding the excessive integration of related components on the battery cover plate 100, making the structure of the battery cover plate 100 simpler and easier to manufacture, and making the manufacturing difficulty of the whole battery assembly 200 lower. During specific implementation, the battery shell 13 and the pole 12 are assembled in a mutually insulated manner, the top of the side wall of the shell 12 is perforated, one end of the pole 12 with a limiting structure is arranged on the inner side of the shell 12, the other end of the pole is riveted in a manner of enabling the side wall of the shell 13 to be fixed in the axial direction of the pole, and the pole 12 and the battery shell 13 can be directly integrally injection-molded to enable the pole 12 to be fixed on the side wall of the battery shell 13. Referring to fig. 3, the two poles 13 in this embodiment are in a double-side pole-out mode, and are respectively disposed on two side walls of the battery case 12 that are relatively far away from each other, so that the occurrence of short circuit inside the electrode can be effectively avoided, and the implementation is easy. The utility model discloses an in other embodiments, also can set up utmost point post 13 in other suitable positions of battery case 12, for example two utmost point posts 13 are unilateral play utmost point mode, and two utmost point posts 13 play utmost point on battery case 12's same lateral wall promptly, and the field person can select utmost point post 13's play utmost point position according to actual demand, and this is no longer repeated here.
While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (11)
1. A battery cover plate, comprising:
the base plate is provided with an explosion-proof hole and a liquid injection hole which penetrate through the upper surface and the lower surface of the base plate;
the explosion-proof valve is arranged in the explosion-proof hole;
the liquid injection hole cover can be connected to the liquid injection hole in a sealing mode;
the substrate is made of polypropylene or polyethylene.
2. The battery cover plate according to claim 1, wherein the injection hole comprises a groove formed in the upper surface of the substrate and a through hole penetrating through a bottom wall of the groove and a lower surface of the substrate, wherein the through hole has a diameter of 1mm to 10 mm.
3. The battery cover plate according to claim 2, wherein the liquid injection hole cover comprises a cap fitted to the groove and a plug fitted to the through hole, one side surface of the cap is an adhesive surface, and the plug is disposed on the adhesive surface.
4. The battery cover plate according to claim 3, wherein the bonding surface is capable of bonding with the groove by a sealant.
5. The battery cover plate according to claim 1, wherein the explosion-proof valve is sheet-shaped and is integrally formed with the base plate through an injection molding process, and an edge of the explosion-proof valve is embedded in a side wall of the explosion-proof hole.
6. The battery cover plate according to claim 1, wherein the upper surface of the explosion-proof valve is provided with a score, and the depth of the score is 0.1mm to 2 mm.
7. The battery cover plate according to claim 1, wherein the upper surface of the explosion-proof valve is provided with a protective film, and the protective film is bonded to the upper surface of the explosion-proof valve.
8. The battery cover plate according to claim 1, wherein the substrate has a thickness of 0.5 to 10mm, the explosion-proof valve has a thickness of 0.5 to 2mm, and the explosion-proof valve has a thickness smaller than that of the substrate.
9. The battery cover plate according to claim 1, wherein the material of the liquid injection hole cover is polypropylene or polyethylene.
10. The battery cover plate according to claim 1, wherein the material of the explosion-proof valve is polypropylene, polyethylene or metal, and the metal comprises at least one of aluminum, copper and nickel.
11. A battery assembly, comprising: a battery case, two poles for electrode extraction, and the battery cover plate of any one of claims 1 to 10;
the battery shell is provided with a bottom wall and a side wall, and the side wall forms an opening matched with the battery cover plate at the top of the battery shell;
the battery cover plate is hermetically connected with the opening, the battery shell and the battery cover plate enclose a sealed cavity, and the cavity is used for containing electrolyte;
the utmost point post set up in the top of lateral wall, utmost point post runs through the lateral wall and with lateral wall sealing connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921585895.4U CN210668438U (en) | 2019-09-23 | 2019-09-23 | Battery cover plate and battery assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921585895.4U CN210668438U (en) | 2019-09-23 | 2019-09-23 | Battery cover plate and battery assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210668438U true CN210668438U (en) | 2020-06-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921585895.4U Active CN210668438U (en) | 2019-09-23 | 2019-09-23 | Battery cover plate and battery assembly |
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| CN (1) | CN210668438U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113745769A (en) * | 2021-08-19 | 2021-12-03 | 新余赣锋电子有限公司 | Battery of high security |
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2019
- 2019-09-23 CN CN201921585895.4U patent/CN210668438U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113745769A (en) * | 2021-08-19 | 2021-12-03 | 新余赣锋电子有限公司 | Battery of high security |
| CN113745769B (en) * | 2021-08-19 | 2024-07-19 | 新余赣锋电子有限公司 | High-safety battery |
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