CN212907868U

CN212907868U - Battery case and battery

Info

Publication number: CN212907868U
Application number: CN202021977987.XU
Authority: CN
Inventors: 廖方俊; 王小明
Original assignee: Zhuhai Cosmx Power Co Ltd
Current assignee: Zhuhai Cosmx Power Co Ltd
Priority date: 2020-09-11
Filing date: 2020-09-11
Publication date: 2021-04-06
Anticipated expiration: 2030-09-11

Abstract

The utility model discloses a battery case and a battery, wherein the battery case comprises a case body, a breathable film attaching groove positioned on the surface of the case body, a vent hole positioned in the breathable film attaching groove, a waterproof breathable film attached above the vent hole, a gas guide groove and a waterproof label; the one end in air guide groove with the attached groove of ventilated membrane is connected, and the other end extends to the edge of casing, waterproof label cover in the surface of casing covers waterproof ventilated membrane completely. The utility model provides a battery case and battery can automatic balance battery inside and outside atmospheric pressure when waterproof.

Description

Battery case and battery

Technical Field

The utility model relates to a battery technology field, concretely relates to battery case and battery.

Background

The battery is used as a power partner closely connected in life of people, and along with the development of science and technology, the battery, especially the lithium ion battery, is more and more widely applied in life of people, such as a mobile phone battery, a notebook battery, a medical instrument battery, a sweeping robot battery, a dust collector battery, an unmanned aerial vehicle battery, a robot battery and the like. Meanwhile, with the increasing functions of electronic products, application scenes are more and more abundant, and the requirements on the reliability of the battery are higher and higher, including the requirements on the severe reliability, the salt fog and the corrosion resistance and the IP protection. In the IP protection design, the design in the past is mainly based on the full-sealed, has ventilative design less, and this kind of design often demonstrates the weak point when dealing with complicated scene, for example when high altitude or high temperature, because inside atmospheric pressure of battery is greater than external atmospheric pressure, can make the battery take place the tympanites, and then makes the product structure take place deformation, causes adverse effect to the equipment, and the deformation of PCB can lead to components and parts to have the detinning risk and components and parts break away from the risk simultaneously, influences the normal function output and the protective properties of battery.

The prior art discloses a waterproof battery pack, which realizes a waterproof function by sealing an upper shell and a lower shell, and the upper shell and the lower shell are connected through a sealing ring and a screw in a sealing manner. As mentioned above, the waterproof method has the disadvantages that the air pressure inside and outside the battery cannot be automatically balanced, and the sealing ring is easy to age and deform and cause waterproof failure as the battery is used for a long time.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a battery case and battery are provided, possess the function of waterproof and balanced battery inside and outside atmospheric pressure simultaneously.

The utility model adopts the following technical scheme:

a waterproof battery case capable of keeping the balance of the internal and external air pressures of a battery comprises a case body, a breathable film attaching groove positioned on the surface of the case body, an air vent positioned in the breathable film attaching groove, a waterproof breathable film attached above the air vent, an air guide groove and a waterproof label; the one end in air guide groove with the attached groove of ventilated membrane is connected, and the other end extends to the edge of casing, waterproof label cover in the surface of casing covers waterproof ventilated membrane completely.

Among the above-mentioned technical scheme, inside waterproof ventilated membrane can prevent liquid to pass through the casing entering battery, can let gas freely pass through simultaneously. The air guide groove is communicated with the upper part of the waterproof breathable film and the outside of the battery, gas in the battery can be discharged to the outside of the battery through the air holes, the waterproof breathable film and the air guide groove, the balance of the air pressure inside and outside the battery is realized, and the problem of battery bulging caused by overhigh internal air pressure is solved. Meanwhile, the waterproof label can avoid direct contact between the waterproof breathable film and the external environment of the battery, so that the waterproof breathable film is prevented from contacting external pollutants such as oil stain and fine dust, and the phenomenon that the breathable function is reduced or damaged is avoided.

Further, the waterproof label is provided with a non-adhesive area at the position area in contact with the waterproof breathable film. The waterproof label is provided with a non-adhesive area in the position area in contact with the waterproof breathable film, namely, the area is subjected to ink glue killing treatment, and a layer of ink is printed on the back adhesive surface to lose adhesiveness; the waterproof label can not be adhered with the waterproof breathable film, the air permeability of the waterproof breathable film can be guaranteed, and the balance of the air pressure inside and outside the battery can be quickly realized.

Further, the thickness of the waterproof label is 0.05-0.8 mm, the non-adhesive area on the waterproof label covers 10% -80% of the area of the waterproof breathable film, and the area of the covering area and the breathable area of the waterproof breathable film are 1.5mm²The areas are overlapped to ensure good ventilation effect.

Further, the waterproof label is a PET film or a PC film or a PVC film.

Further, the size of the waterproof breathable film is smaller than that of the breathable film attaching groove, and the waterproof breathable film is attached in the breathable film attaching groove. The waterproof breathable film can better cover the air holes, so that the waterproof sealing effect is enhanced.

Further, waterproof ventilated membrane includes waterproof double faced adhesive tape and ventilative diaphragm, ventilative diaphragm attach in on the one side of waterproof double faced adhesive tape, the another side of waterproof double faced adhesive tape is attached in the attached inslot of ventilated membrane, and is waterproof the middle part of waterproof double faced adhesive tape is equipped with the air vent. The central area of waterproof double faced adhesive tape sets up the air vent, and ventilative diaphragm middle zone can not bond together with waterproof double faced adhesive tape, improves ventilative efficiency.

Further, the breathable membrane is an EPTFE waterproof breathable film. The breathable membrane can allow gas to pass through, but liquid and dust cannot pass through, so that the waterproof and breathable effects are achieved. The waterproof double-sided adhesive tape is a PET film or a PC film or a PVC film.

Further, the depth of the breathable film attaching groove is plus 0.03-0.08 mm of the thickness of the waterproof breathable film, so that the waterproof breathable film cannot jack up a waterproof label, and the smoothness of the attaching groove after the waterproof label is attached can be guaranteed; the air holes are through holes, the diameter of each air hole is 0.5-2 mm, the air holes are prevented from being positioned right above the battery core as far as possible, and the diameter of each air hole is as small as possible under the condition of meeting the air permeation requirement, so that the safety protection level of the battery is improved; the width of the air guide groove is 0.3-2 mm, the depth is 0.05-5 mm, the number of the air guide grooves is 1 or more, and under the condition that one air guide groove is accidentally blocked, other air guide grooves can still support work.

A battery comprises a battery case, a battery core, a protection board, a light guide plate, a fixed film and a battery cover, wherein the battery cover and the battery case form a closed battery containing cavity through sealant, and the battery case, the battery core, the protection board and the light guide plate are all located in the battery containing cavity.

Drawings

Fig. 1 is a schematic view of an exploded structure of a waterproof battery case according to the present invention;

fig. 2 is a schematic plan view of the casing of the waterproof battery casing of the present invention;

FIG. 3 is an enlarged schematic view of region A in FIG. 2;

FIG. 4 is a schematic structural view of the waterproof and breathable film of the present invention;

fig. 5 is a schematic view of an exploded structure of the waterproof battery of the present invention;

the labels in the figure are: 1-shell, 2-breathable film attaching groove, 3-breathable hole, 4-waterproof breathable film, 41-waterproof double-sided adhesive, 42-breathable membrane, 43-breathable hole, 5-breathable groove, 6-waterproof label, 7-battery core, 8-protective plate, 9-light guide plate, 10-fixed film, 11-battery cover and 12-waterproof battery case.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings, wherein for convenience of description, the upper, lower, left, right, front, rear, and other orientations may be defined in the present application, and the present application is intended to clearly describe the relative position relationship of the structures, and is not intended to limit the actual orientation of the product during the manufacturing, using, selling, and the like. The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:

as shown in fig. 1 to 3, a battery case includes a case 1, a breathable film attachment groove 2 located on an upper surface of the case 1, a vent hole 3 located in the breathable film attachment groove 2, a waterproof breathable film 4 attached in the breathable film attachment groove 2, a vent groove 5, and a waterproof label 6; air guide slot 5's one end with the attached groove 2 of ventilated membrane is connected, and the other end extends to the edge of casing 1, waterproof label 6 cover completely in the whole upper surface of casing 1, waterproof label 6 with the position region of waterproof ventilated membrane 4 contact is equipped with the non-gluey district, waterproof ventilated membrane 4 covers on bleeder vent 3. The air guide groove 5 is communicated with the upper part of the waterproof breathable film 4 and the outside of the battery, and gas in the battery can be discharged to the outside of the battery through the air holes 3, the waterproof breathable film 4 and the air guide groove 5 in sequence, so that the balance of the air pressure inside and outside the battery is realized.

As shown in fig. 4, the waterproof breathable film 4 includes a waterproof double-sided adhesive tape 41 and a breathable film 42, the breathable film 42 is attached to the waterproof double-sided adhesive tape 41, and a vent hole 43 is disposed in the middle of the waterproof double-sided adhesive tape 41. The central area of the waterproof double-sided tape 41 is provided with the vent hole 43, and the middle area of the breathable membrane 42 is not bonded to the waterproof double-sided tape 41. The breathable membrane 42 is a polytetrafluoroethylene EPTFE waterproof breathable film. The gas permeable membrane 42 allows gas to pass through but liquid and dust cannot pass through, thereby achieving the waterproof and gas permeable effects. The waterproof label 6 is a PET film. The waterproof double-sided adhesive tape 41 is a PET film.

The breathable film is attachedThe groove depth is the thickness of the waterproof breathable film plus 0.03-0.08 mm, so that the waterproof breathable film can not jack up the waterproof label, and the smoothness of the position of the attaching groove after the waterproof label is attached can be ensured; the air holes are through holes, the diameter of each air hole is 0.5-2 mm, and the diameter of each air hole is as small as possible under the condition of meeting the air permeation requirement, so that the safety protection level of the battery is improved; the thickness of the breathable membrane is 0.05 mm-0.5 mm, the width of the waterproof double-sided adhesive tape is 2.0-15 mm, so that good IP protection performance is guaranteed, the viscosity of the double-sided adhesive tape is more than or equal to 1.0kgf/25mm, and the double-sided adhesive tape and an attached object have good bonding performance; the width of the air guide groove is 0.3-2 mm, and the depth of the air guide groove is 0.05-5 mm; the thickness of the waterproof label is 0.05-0.8 mm, the non-adhesive area on the waterproof label covers the area of the waterproof breathable film area to be 10% -80%, and the area of the coverage area and the breathable area of the waterproof breathable film have 1.5mm²The areas are overlapped to ensure good ventilation effect.

Among the above-mentioned technical scheme, inside waterproof ventilated membrane can prevent liquid to pass through the casing entering battery, can let gas freely pass through simultaneously. The air guide groove is communicated with the upper part of the waterproof breathable film and the outside of the battery, gas in the battery can be discharged to the outside of the battery through the air holes, the waterproof breathable film and the air guide groove, the balance of the air pressure inside and outside the battery is realized, and the problem of battery bulging caused by overhigh internal air pressure is solved. Meanwhile, the waterproof label can avoid direct contact between the waterproof breathable film and the external environment of the battery, so that the waterproof breathable film is prevented from contacting external pollutants such as oil stain and fine dust, and the phenomenon that the breathable function is reduced or damaged is avoided. The waterproof label is subjected to ink glue killing treatment in a position area in contact with the waterproof breathable film, namely, a layer of ink is printed on the back adhesive surface, so that the back adhesive surface loses viscosity; the waterproof label can not be adhered with the waterproof breathable film, the air permeability of the waterproof breathable film can be guaranteed, and the balance of the air pressure inside and outside the battery can be quickly realized.

As shown in fig. 5, a battery includes a battery case 12, a battery core 7, a protection plate 8, a light guide plate 9, a fixing film 10, and a battery cover 11, where the battery cover 11 and the battery case form a sealed battery cavity through a sealant, and the battery case, the battery core 7, the protection plate 8, and the light guide plate 9 are all located in the battery cavity.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. The protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A battery case, characterized in that: the breathable film adhesive tape comprises a shell, a breathable film attaching groove positioned on the surface of the shell, a breathable hole positioned in the breathable film attaching groove, a waterproof breathable film attached above the breathable hole, a breathable groove and a waterproof label; the one end in air guide groove with the attached groove of ventilated membrane is connected, and the other end extends to the edge of casing, waterproof label cover in the surface of casing covers waterproof ventilated membrane completely.

2. A battery case according to claim 1, wherein: the waterproof label is provided with a non-adhesive area at the position area in contact with the waterproof breathable film.

3. A battery case according to claim 2, wherein: the thickness of the waterproof label is 0.05-0.8 mm, the non-adhesive area on the waterproof label covers the area of the waterproof breathable film area is 10% -80%, and the area of the covering area and the breathable area of the waterproof breathable film area are 1.5mm²The above areas overlap.

4. A battery case according to claim 1, wherein: the waterproof label is a PET film or a PC film or a PVC film.

5. A battery case according to claim 1, wherein: the size of the waterproof breathable film is smaller than that of the breathable film attaching groove, and the waterproof breathable film is attached in the breathable film attaching groove.

6. A battery case according to claim 1, wherein: the waterproof breathable film comprises a waterproof double-sided adhesive and a breathable membrane, the breathable membrane is attached to the waterproof double-sided adhesive, and a vent hole is formed in the middle of the waterproof double-sided adhesive.

7. A battery can according to claim 6, wherein: the breathable membrane is an EPTFE waterproof breathable film; and/or the waterproof double-sided adhesive tape is a PET film or a PC film or a PVC film.

8. A battery can according to claim 6, wherein: the thickness of the breathable membrane is 0.05 mm-0.5 mm, and the width of the waterproof double-sided adhesive tape is 2.0-15 mm.

9. The battery can according to any one of claims 1 to 8, wherein: the depth of the breathable film attaching groove is + 0.03-0.08 mm of the thickness of the waterproof breathable film; the diameter of the air holes is 0.5-2 mm; the width of the air guide groove is 0.3-2 mm, the depth of the air guide groove is 0.05-5 mm, and the number of the air guide grooves is one or more.

10. The utility model provides a battery, its includes electric core, protection shield, light guide plate, fixed film, battery cover and battery case, its characterized in that: the battery case is the battery case according to any one of claims 1 to 9, the battery cover and the battery case form a sealed battery cavity through a sealant, and the battery case, the battery core, the protection plate and the light guide plate are all located in the battery cavity.