Structure of a battery cover plate and battery

Abstract

Structure of a battery cover plate, characterized in that the structure a substrate (1) on which a through-hole for penetrating a pole (2) is provided, wherein the outer side of the portion of the pole (2) located above the substrate (1) is provided with a projecting flange portion (3); a temperature-resistant sealing element (4) arranged laterally around the pole (2) and located between the lower end of the flange portion (3) and the top side of the substrate (1), includes.

Description

TECHNICAL FIELD

[0001] The present invention relates to the technical field of a battery, particularly to a structure of a battery cover plate and a battery. STATE OF THE ART

[0002] With the continuous development of electric vehicles, people are also placing greater demands on electric vehicles. Electric vehicles must not only have a range of over 700 km, but also be able to offer a range of over 400 km on a 10-minute charge. This poses new challenges for the design and manufacturing of conventional battery structure components.

[0003] The increasing demands for fast battery charging lead to greater heat generation inside the battery. The current capacity of the components of a battery structure must meet these requirements. To meet the current capacity during the battery manufacturing process, a larger welding area is also required. The larger the welding area, the greater the heat generation during the battery manufacturing process. If the heat exceeds the limit, plastic parts can melt. Melting of the plastic parts leads to inadequate sealing of the battery and, in severe cases, can lead to battery leakage and fire. SUMMARY OF THE INVENTION

[0004] The purpose of the invention is to provide a structure of a battery cover plate to solve the above-mentioned technical problems.

[0005] The purpose of the invention is further to provide a battery to solve the above-mentioned technical problems.

[0006] The technical problem solved by the present invention can be achieved by applying the following technical solutions: A battery cover plate structure comprising: a substrate on which a through-hole for penetrating a pole is provided, wherein the outer side of the portion of the pole located above the substrate is provided with a projecting flange portion; a temperature-resistant sealing element arranged laterally around the pole and located between the lower end of the flange section and the top surface of the substrate.

[0007] Preferably, the temperature-resistant sealing element comprises a steel ring and a temperature-resistant layer enveloping the outside of the steel ring.

[0008] Preferably, the temperature-resistant layer is a ceramic layer or an epoxy coating.

[0009] Preferably, a stop is provided in the gap between the pole and the bore wall of the through-bore.

[0010] Preferably, an insulating sheet flush with the bottom of the pole is provided below the substrate.

[0011] Preferably, a connecting plate is provided at the lower end of the pole and the insulating plate, wherein a pole lug is provided at the lower end of the connecting plate, wherein the pole is electrically connected to the pole lug via the connecting plate.

[0012] Preferably, a projecting lower flange portion is provided from the outside of a lower part of the portion of the pole located below the substrate, wherein a sealing ring is provided between the upper side of the lower flange portion and the underside of the substrate.

[0013] Preferably, the through holes comprise a first through hole for penetrating the positive pole and a second through hole for penetrating the negative pole.

[0014] A battery having the structure of a battery cover plate provided.

[0015] Preferably, the outside of the housing of the battery is covered with an insulating tape, wherein at least a part of the side surface of the housing is exposed to the outside.

[0016] Advantageous effects of the invention are: By adopting the above-mentioned technical solution, the invention uses a riveted temperature-resistant sealing element between the lower end of the flange portion and the upper surface of the substrate instead of the conventional polyphenylene sulfide (PPS) plastic part. As a result, the sealing performance of the battery cover plate is not affected by welding heat or rapid charging heat, and the tightness requirements of the battery during rapid charging are met. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 shows a cross-sectional view of a structure of a battery cover plate according to an embodiment of the present invention; Fig. 2 shows a schematic diagram of the external structure of a battery according to an embodiment of the present invention.

[0017] In the attached drawings: 1. Substrate; 2. Pole; 3. Flange section; 4. Temperature-resistant sealing element; 41. Steel ring; 42. Temperature-resistant layer; 5. Stop; 6. Insulating sheet; 7. Connecting sheet; 8. Pole lug; 9. Lower flange; 10. Sealing ring; 11. Housing; 12. Insulating tape. DESCRIPTION OF THE EMBODIMENTS

[0018] In the following, the technical solutions in the embodiments of the invention are described clearly and completely with reference to the drawings. The described embodiments obviously represent only a part, but not all, of the embodiments of the invention. Based on the embodiments of the invention, all further embodiments created by those skilled in the art without creative effort fall within the scope of the invention.

[0019] It should be noted that the embodiments of the present invention and the features in the embodiments may be combined with each other unless there is a conflict.

[0020] The present invention will be described in more detail below in conjunction with the accompanying drawings and exemplary embodiments, but they are not intended to limit the present invention.

[0021] A structure of a battery cover plate as shown in Fig. 1, includes: a substrate 1 on which a through-hole for penetrating a pole 2 is provided, the outer side of the portion of the pole located above the substrate 1 being provided with a projecting flange portion 3; a temperature-resistant sealing element 4, which is arranged laterally around the pole 2 and is located between the lower end of the flange section 3 and the top side of the substrate 1.

[0022] Specifically, the present invention provides a sealing structure for a battery cover plate, replacing the prior art polyphenylene sulfide (PPS) plastic part with a temperature-resistant sealing member riveted between the lower end of the flange portion 3 and the upper surface of the substrate 1. The temperature-resistant sealing member 4 is stiffer and more temperature-resistant than the plastic part. As a result, the sealing performance of the battery cover plate is not affected by welding heat or rapid charging heat, and the tightness requirements of the battery during rapid charging are met. The present invention resolves the contradiction between sealing and heat generation. The structure is simple, inexpensive, and easy to market.

[0023] In a preferred embodiment, the temperature-resistant sealing element 4 comprises a steel ring 41 and a temperature-resistant layer 42 enveloping the outside of the steel ring 41.

[0024] In particular, in the present invention, the plastic part is replaced by a temperature-resistant sealing element 4 and a structure of a steel ring 41 with higher rigidity and better temperature resistance together with a temperature-resistant layer 42 is used, so that the heat generated during the welding process or the rapid charging process and acting on the temperature-resistant sealing element 4 does not lead to the collapse and deformation of the structure 4 and thus the sealing is ensured.

[0025] In a preferred embodiment, the temperature-resistant layer 42 is a ceramic layer or an epoxy coating.

[0026] In particular, the thickness of the temperature-resistant layer 42 in the present invention is 0.15 mm to 0.2 mm, thereby ensuring that the insulation performance meets the requirements.

[0027] In a preferred embodiment, a stop 5 is provided in the gap between the pole 2 and the bore wall of the through-bore.

[0028] In particular, the stopper 5 is installed in the gap between the substrate 1 and the pole 2 to prevent the pole 2 from moving left and right.

[0029] In a preferred embodiment, an insulating sheet 6 flush with the bottom of the pole 2 is provided below the substrate 1.

[0030] In particular, a connecting plate 7 is provided at the lower end of the pole 2 and the insulating plate 6, wherein the back of the pole 2 and the connecting plate 7 are in close contact without a step structure, thereby ensuring better contact and thus ensuring better heat dissipation and current carrying capacity.

[0031] In a preferred embodiment, a connecting plate 7 is provided at the lower end of the pole 2 and the insulating plate 6, wherein a pole lug 8 is provided at the lower end of the connecting plate 7 and the pole 2 is electrically connected to the pole lug 8 via the connecting plate 7.

[0032] In particular, the present invention provides a flow-through structure for a battery cover plate, comprising a terminal lug 8, a connecting plate 7, a terminal 2, and the associated welds. The terminal 2 according to the invention has a large diameter exceeding 20 mm to ensure the component's flow capacity. When welding terminal 2 and connecting plate 7, the welding area can be adjusted according to the actual fast-charging requirements. A great deal of welding heat is generated during the welding process of the invention, but this heat exposure to the temperature-resistant sealing element 4 does not lead to collapse or deformation of the structure, thus ensuring the seal.

[0033] In a preferred embodiment, a projecting lower flange portion 9 is provided from the outside of a lower part of the portion of the pole 2 located below the substrate 1, wherein a sealing ring 10 is provided between the upper side of the lower flange portion 9 and the underside of the substrate 1.

[0034] In particular, the sealing structure for a cover plate according to the present invention comprises a pole 2, a sealing ring 10, a substrate 1, a temperature-resistant sealing element 4 and a stop 5. The overall sealing is achieved by riveting the head of the pole 2 to a sealing ring.

[0035] In the present invention, the sealing ring 10 is placed on the pole 2 up to the base of the pole and then clamped in a specific position to ensure that the compression ratio of the sealing ring 10 is 20-40%. Next, the stopper 5 is installed in the gap between the substrate 1 and the pole 2 to ensure that the pole 2 does not move left and right. Then, the steel ring 41, already coated with the temperature-resistant layer 42, is installed, and finally, the pole 2 is riveted and crimped using a riveting machine to press the entire sealing structure tightly.

[0036] In a preferred embodiment, the through-holes comprise a first through-hole for penetrating the positive pole and a second through-hole for penetrating the negative pole.

[0037] A battery, as in Fig.2 is provided with a structure of a battery cover plate according to one of the embodiments.

[0038] In a preferred embodiment, the outside of the housing 11 of the battery is covered with an insulating tape 12, wherein at least a part of the side surface of the housing 11 is exposed to the outside.

[0039] Specifically, in the present invention, the insulating tape 12 is wrapped around the outside of the battery casing 11, but some areas on the side of the casing 11 are not wrapped with the insulating tape 12. Also, heat is generated by the battery electrode plates during rapid charging, and this heat must be dissipated in a timely manner. In the present invention, some areas on both sides of the casing 11 are exposed, so that the surface of the aluminum casing 11 of the battery is in direct contact with the thermally conductive structural adhesive at the battery pack level. This ensures the heat dissipation area and reduces the thermal resistance, which significantly improves the heat dissipation efficiency and ensures the rapid charging efficiency of the battery.

[0040] The above description merely represents a preferred embodiment of the present invention and does not limit its embodiments or scope. Those skilled in the art should be aware that all solutions achieved through equivalent substitutions and obvious modifications based on the description and illustrations of the present invention fall within the scope of the present invention.

Claims

[1] Structure of a battery cover plate, characterized by that the structure a substrate (1) on which a through-hole for penetrating a pole (2) is provided, wherein the outer side of the portion of the pole (2) located above the substrate (1) is provided with a projecting flange portion (3); a temperature-resistant sealing element (4) arranged laterally around the pole (2) and located between the lower end of the flange portion (3) and the top side of the substrate (1), includes. [2] Structure of a battery cover plate according to claim 1, characterized by that the temperature-resistant sealing element (4) comprises a steel ring (41) and a temperature-resistant layer (42) enveloping the outside of the steel ring (41). [3] Structure of a battery cover plate according to claim 2, characterized bythat the temperature-resistant layer (42) is a ceramic layer or an epoxy coating. [4] Structure of a battery cover plate according to claim 1, characterized by that a stop (5) is provided in the gap between the pole (2) and the bore wall of the through-bore. [5] Structure of a battery cover plate according to claim 1, characterized by that an insulating sheet (6) is provided below the substrate (1), wherein the insulating sheet is flush with the bottom of the pole (2). [6] Structure of a battery cover plate according to claim 5, characterized by that a connecting plate (7) is provided at the lower end of the pole (2) and the insulating plate (6), wherein a pole lug (8) is provided at the lower end of the connecting plate (7), wherein the pole (2) is electrically connected to the pole lug (8) via the connecting plate (7). [7] Structure of a battery cover plate according to claim 1, characterized bythat a projecting lower flange portion (9) is provided from the outside of a lower part of the portion of the pole (2) located below the substrate (1), wherein a sealing ring (10) is provided between the upper side of the lower flange portion (9) and the underside of the substrate (1). [8] Structure of a battery cover plate according to claim 1, characterized by that the through-hole has a first through-hole for penetrating the positive pole and a second through-hole for penetrating the negative pole. [9] Battery, characterized by that a structure of a battery cover plate according to one of claims 1 to 8 is provided on the battery. [10] Battery according to claim 9, characterized by that the outside of the housing (11) of the battery is covered with an insulating tape (12), wherein at least part of the side surface of the housing (11) is exposed to the outside.

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