Battery pack for electronic cigarette

Abstract

The utility model provides a battery pack for an electronic cigarette, which is provided with a battery and a substrate, the battery is a cylindrical battery, a positive electrode guide plate and a negative electrode guide plate are respectively arranged on a positive electrode end and a negative electrode end at two ends of the battery, and the positive electrode guide plate and the negative electrode guide plate are bent towards a cylindrical surface of the battery and extend towards an opposite electrode. At least one part of the positive electrode guide plate and / or the negative electrode guide plate extending to the opposite electrode is attached to the cylindrical surface of the battery, the substrate is electrically connected with the positive electrode guide plate and the negative electrode guide plate, the length of the substrate is smaller than that of the battery, and the substrate is not in direct contact with the cylindrical surface of the battery. According to the battery pack for the electronic cigarette, the battery pack is small in size and can be used continuously for a long time.

Description

Technical Field

[0001] The utility model relates to a battery pack, and in particular to a battery pack for an electronic cigarette. Background Art

[0002] With the popularity of electronic cigarettes, the usage habits of the target audience are also complex and diverse, so there are high requirements for the battery life of electronic cigarettes. As lithium batteries for electronic cigarettes that meet this requirement, large-capacity batteries such as 18650 lithium batteries are usually used in the prior art. 18650 lithium battery is a standard model of lithium battery, which refers to a cylindrical battery with a diameter of 18mm and a length of 65mm. The battery itself is relatively large in size. Not only that, when using large-capacity batteries such as 18650 lithium in the prior art to form a battery pack, a large-area substrate is used, which increases the total volume of the battery pack. These directly or indirectly lead to the large volume of electronic cigarettes, which does not meet the user's further demand for miniaturization and lightweight electronic cigarettes. Moreover, when using a large-area substrate, there is also the problem that the internal structure of the battery pack is loose and the connection between the substrate and the battery is not compact. Utility Model Content

[0003] Technical problems to be solved

[0004] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is to provide a battery pack for electronic cigarettes that takes into account miniaturization, lightness and battery life.

[0005] Technical means for solving technical problems

[0006] In order to solve the above technical problems, the inventors of the present utility model found that improving the space efficiency of the battery pack is effective.

[0007] Specifically, a battery pack for electronic cigarettes according to one embodiment of the utility model may include a battery and a substrate, wherein the battery is a cylindrical battery, and a positive electrode guide plate and a negative electrode guide plate are respectively arranged on the positive terminal and the negative terminal located at the two ends thereof, the positive electrode guide plate and the negative electrode guide plate are bent toward the cylindrical surface of the battery and extend toward the opposite pole, at least a portion of the positive electrode guide plate and / or the negative electrode guide plate extending toward the opposite pole is in contact with the cylindrical surface of the battery, the substrate is electrically connected to the positive electrode guide plate and the negative electrode guide plate, the length of the substrate is less than the length of the battery, and the substrate is not in direct contact with the cylindrical surface of the battery.

[0008] According to the above-mentioned electronic cigarette battery pack, the length of the battery may be greater than or equal to 49 mm and less than or equal to 50 mm.

[0009] According to the above-mentioned battery pack for electronic cigarettes, a battery control module may be arranged on the substrate.

[0010] According to the above-mentioned battery pack for electronic cigarettes, the battery may be of 18500 type.

[0011] According to the above-mentioned battery pack for electronic cigarettes, the substrate can be inserted under the positive electrode guide plate and the negative electrode guide plate by inserting assembly and electrically connected to the positive electrode guide plate and the negative electrode guide plate by soldering.

[0012] According to the above-mentioned battery pack for electronic cigarettes, the distance between the substrate and the cylindrical surface of the battery may be greater than 0 mm and less than 1 mm.

[0013] According to the above-mentioned battery pack for electronic cigarettes, an insulating layer may be arranged between the substrate and the cylindrical surface of the battery.

[0014] According to the above-mentioned battery pack for electronic cigarette, the battery may be a secondary battery.

[0015] According to the above-mentioned electronic cigarette battery pack, the material of the substrate may be phenolic resin or epoxy resin.

[0016] According to the above-mentioned battery pack for electronic cigarettes, the positive electrode guide plate and / or the negative electrode guide plate can be adhered and fixed on the cylindrical surface of the battery by a high temperature resistant insulating tape.

[0017] Effect of utility model

[0018] According to the utility model, the guide plate and the battery adopt a fitting design, which improves the space efficiency of the battery pack, realizes a small size of the battery pack, and thus improves the volume energy density. In addition, the base plate can be set in an inserted assembly manner to realize a small size of the battery pack. A lithium battery with a large capacity and a small volume and a high specific capacity can also be used, which can ensure continuous long-term use while being small in size. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram showing the structure of a battery pack for electronic cigarettes in the prior art. Figure 1 (a) is the front view, Figure 1 (b) is the left view.

[0020] Figure 2 It is a three-dimensional diagram showing the schematic structure of an embodiment of the battery pack for electronic cigarette of the present invention (without substrate).

[0021] Figure 3 To express in Figure 2 The schematic diagram of the structure after the substrate is assembled on one embodiment of the battery pack for electronic cigarettes of the utility model is shown. Figure 3 (a) is a top view, Figure 3 (b) is the right view.

[0022] Description of Reference Numerals

[0023] 1, 2: Battery pack for electronic cigarettes

[0024] 11, 21: Battery

[0025] 12, 22: Substrate

[0026] 13, 23: Positive electrode guide plate

[0027] 14, 24: Negative electrode guide plate

[0028] 25: Insulation layer

[0029] 26: Insulation tape DETAILED DESCRIPTION

[0030] The following will describe the prior art and the specific embodiments of the present invention in detail with reference to the accompanying drawings. The described embodiments are merely exemplary and can take a variety of forms. In addition, the drawings disclosed in this specification are used for schematic illustration in principle. That is, the size ratios on the drawings may not be consistent with the actual size ratios, and the size ratios between the drawings may not be consistent.

[0031] Figure 1 The schematic structure of a battery pack for electronic cigarettes in the prior art is shown. Figure 1 (a) is the left view, Figure 1 (b) is a front view. The prior art electronic cigarette battery pack comprises a battery 11, a substrate 12, a positive electrode guide plate 13 and a negative electrode guide plate 14. The battery 11 is a relatively large cylindrical battery such as a 18650 lithium battery, and the positive electrode guide plate 13 and the negative electrode guide plate 14 are respectively arranged at the positive terminal and the negative terminal at both ends of the battery 11. A substrate 12 is arranged parallel to the axis of the battery 11, and the substrate 12 is electrically connected to the positive electrode guide plate 13 and the negative electrode guide plate 14 by soldering.

[0032] However, in order to ensure the soldering position, the length of the substrate 12 must be greater than the length of the battery 11, and there must be space between the substrate 12 and the cylindrical surface of the battery 11 for inserting the soldering gun. In the prior art, due to the use of larger batteries such as 18650 lithium batteries, the overall size of the battery pack is large. And as can be seen from the figure, the overall internal structure of the assembled battery pack is loose, and there is a large amount of invalid space, resulting in low volume energy density.

[0033] Next, use Figure 2 , Figure 3 An electronic cigarette battery pack according to an embodiment of the present invention is described below. Figure 2The schematic diagram of the structure before the substrate is assembled is shown in Figure 3 The schematic diagram of the structure after the substrate is assembled is shown in FIG. Figure 2 For a stereogram, Figure 3 (a) is a top view, Figure 3 (b) is the right view.

[0034] As shown in the figure, the battery pack for electronic cigarettes in this embodiment includes a battery 21 and a substrate 22. The battery 21 is a cylindrical battery, and a positive electrode guide plate 23 and a negative electrode guide plate 24 are respectively arranged on the positive terminal and the negative terminal at both ends thereof. The positive electrode guide plate 23 and the negative electrode guide plate 24 are bent toward the cylindrical surface of the battery 21 and extend toward the opposite pole. At least a portion of the positive electrode guide plate 23 and / or the negative electrode guide plate 24 extending toward the opposite pole is in contact with the cylindrical surface of the battery 21. The substrate 22 is electrically connected to the positive electrode guide plate 23 and the negative electrode guide plate 24. The length of the substrate 22 is less than the length of the battery 21, and the substrate 22 is not in direct contact with the cylindrical surface of the battery 21.

[0035] In this embodiment, the battery 21 is a cylindrical battery. The cylindrical shape generally refers to a cylindrical shape, but is not limited thereto, and also includes a non-standard cylindrical shape, a cylindrical shape with a non-circular bottom surface, etc. As long as it can be used for electronic cigarettes, there are no other restrictions. As the battery 21, for example, it can be a secondary battery. From the perspective of carriers, the battery 21 can be a lithium battery, a nickel-hydrogen battery, a fluoride ion battery, an air battery, etc. From the perspective of electrolytes, the battery 21 can be a liquid battery, a semi-solid battery, a solid-state battery, etc. From the perspective of the internal structure of the battery, the battery 21 can be a winding type, a stacked type, etc.

[0036] In this embodiment, the length of the battery 21 is greater than 49 mm and less than 50 mm. Such a length is preferred from the perspective of being able to maximally reflect the effects of the utility model in terms of miniaturization, lightness, and battery life. Commercially available products of such batteries include 18500 lithium batteries (sometimes also referred to as 1850 lithium batteries). 18500 lithium batteries refer to cylindrical lithium batteries with a diameter of 18 mm and a length of 50 mm. They are relatively small in size, but can achieve long-term use effects.

[0037] At the same time, if Figure 3 As shown in (b), in this embodiment, the negative electrode guide plate 24 extending toward the opposite electrode is bonded to the cylindrical surface of the battery 21. With such a bonded design, the structure of the battery pack can be made more compact, which is conducive to miniaturization. The negative electrode guide plate 24 and the battery 21 can be bonded and fixed on the cylindrical surface of the battery 21 using a high temperature resistant insulating tape 26. This can make the internal structure of the battery pack more stable and compact.

[0038] It should be noted that, in addition to Figure 3In addition to the above-mentioned cases, a part of the negative electrode guide plate 24 extending toward the opposite electrode may be attached to the cylindrical surface of the battery 21, or a part or even the whole of the positive electrode guide plate 23 extending toward the opposite electrode may be attached to the cylindrical surface of the battery, or a part or even the whole of the negative electrode guide plate 24 extending toward the opposite electrode and at least a part of the negative electrode guide plate may be attached to the cylindrical surface of the battery, as long as the electrical insulation of the battery pack is not damaged. In addition, when at least a part of the positive electrode guide plate 23 and / or the negative electrode guide plate 24 extending toward the opposite electrode is attached to the cylindrical surface of the battery 21, the positive electrode guide plate 23 and / or the negative electrode guide plate 24 and the battery 21 may be arbitrarily selected to be attached and fixed to the cylindrical surface of the battery 21 by using a high temperature resistant insulating tape 26 as needed.

[0039] In this embodiment, the substrate 22 only needs to include the battery control module, and there is no other limitation. For example, all safety components can also be integrated on the substrate 22. The material of the substrate 22 is preferably phenolic resin or epoxy resin.

[0040] In this embodiment, if Figure 2 , Figure 3 As shown, the positive electrode guide plate 23 and the negative electrode guide plate 24 are bent toward the cylindrical surface of the battery 21 and extend toward the opposite electrode, and the substrate 22 is electrically connected to the positive electrode guide plate 23 and the negative electrode guide plate 24. Therefore, the length of the substrate 22 used can be less than the length of the battery 21. From the perspective of practicality, the length of the substrate 22 can be greater than 20 mm and less than 23 mm.

[0041] To avoid short circuit, the substrate 22 is not in direct contact with the cylindrical surface of the battery 21. For example, a certain distance may be spaced between the substrate 22 and the cylindrical surface of the battery 21, and the distance is preferably greater than 0 mm and less than 1 mm. This can take into account both insulation and the small size of the battery pack. For example, Figure 2 To illustrate, the negative electrode conductor 24 extends from the bent portion to the opposite electrode, and its front half is in contact with the cylindrical surface of the battery 21, but its rear half is bent again in the direction away from the cylindrical surface and finally separated from the cylindrical surface of the battery 21 by a predetermined distance, and at the same time, the positive electrode conductor 23 extends from the bent portion to the opposite electrode in a manner separated from the cylindrical surface of the battery 21 by the same predetermined distance. When the substrate 22 is mounted between the negative electrode conductor 24 and the positive electrode conductor 23, the substrate 22 is naturally separated from the cylindrical surface of the battery 21 by a predetermined distance.

[0042] As a means of realizing that the substrate 22 and the cylindrical surface of the battery 21 are not in direct contact, it is also possible to Figure 2As shown, an insulating layer 25 is arranged between the substrate 22 and the cylindrical surface of the battery 21. As the insulating layer 25, there is no particular limitation as long as it can play an insulating effect, for example, it can be an insulating plate. As the insulating plate, for example, an insulating plate made of Nomex material can be cited. The thickness of the insulating plate can be, for example, not less than 0.2 mm and not more than 0.5 mm, so that the insulation and the small size of the battery pack can be better taken into account. From the viewpoint of further ensuring insulation, the insulating layer 25 can be arranged between the positive electrode guide plate 23 extending toward the opposite pole, the negative electrode guide plate 24 and the substrate 22 and the cylindrical surface of the battery 21.

[0043] It should be noted that the substrate 22 and the columnar surface of the battery 21 may be spaced at a certain distance and the insulating layer 25 may be disposed, and they may be used alone or in combination. From the viewpoint of further ensuring insulation, it is preferable to use them in combination.

[0044] In addition, the electrical connection between the substrate 22 and the positive electrode guide plate 23 and the negative electrode guide plate 24 can be achieved by inserting the substrate under the positive electrode guide plate and the negative electrode guide plate in an insertion assembly manner and electrically connecting the substrate with the positive electrode guide plate and the negative electrode guide plate by soldering. In this way, there is no need to leave space for inserting a soldering gun between the substrate 22 and the cylindrical surface of the battery 21, which can further improve the space efficiency of the battery pack.

[0045] Next, an example of a method for manufacturing the battery pack according to the present embodiment will be described.

[0046] (1) Preparation of battery 21 and insulating layer 25

[0047] In this embodiment, the battery 21 is a 1850 lithium battery, which is a cylindrical lithium battery with a diameter of 18 mm and a length of 50 mm (commercially available model 18500, capacity 1975 mAH). An insulating layer 25 is attached to the surface of the battery casing. In this embodiment, an insulating plate with a thickness of 0.23 mm and a commercially available model of NOMEX is used as the insulating layer 25.

[0048] (2) Assembling the positive electrode guide plate 23 and the negative electrode guide plate 24

[0049] The positive electrode guide plate 23 and the negative electrode guide plate 24 are respectively assembled by spot welding at the positive terminal and the negative terminal of the battery 21. The assembled positive electrode guide plate 23 and the negative electrode guide plate 24 are bent toward the cylindrical surface of the battery 21 and extend toward the opposite electrode. The positive electrode guide plate 23 extends toward the opposite electrode in a manner of being separated from the cylindrical surface of the battery 21 by a distance of 0.5 to 1 mm from the bent portion. At the same time, the negative electrode guide plate 24 extends from the bent portion to the opposite electrode. The front half of the negative electrode guide plate 24 is in contact with the cylindrical surface of the battery 21, but the rear half of the negative electrode guide plate 24 is bent again in a direction gradually away from the cylindrical surface and finally separated from the cylindrical surface of the battery 21 by a distance of 0.5 to 1 mm.

[0050] (3) Attaching insulating tape 26

[0051] A high temperature resistant insulating tape 26 (material: PI tape) is attached to the portion where the negative electrode conductor 24 and the cylindrical surface of the battery 21 are bonded, so that the negative electrode conductor 24 and the battery 21 are bonded and fixed.

[0052] (4) Mounting substrate 22

[0053] A substrate 22 having a length of 23 mm, a width of 18 mm, and a thickness of 0.6 mm was prepared, and the substrate 22 was inserted between the negative electrode lead plate 24 and the positive electrode lead plate 23 and fixed and electrically connected by soldering to obtain a battery pack.

[0054] After inspection, the battery pack is compact and stable, with an overall size of 53mm long, 19mm wide and 20mm high, achieving a small size. In addition, during the electrical characteristics inspection, the battery pack's electrical performance was normal, with no short circuit or other adverse conditions.

[0055] As mentioned above, one embodiment of the present invention has been described, but the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention.

[0056] The advantages and improvements of the utility model will be easily thought of by those skilled in the art, and thus the scope of the utility model is not limited by the above typical examples and specific details. Therefore, the utility model can be modified in various ways without departing from the spirit or scope of the general inventive concept defined by the attached claims and their equivalents.

Claims

1. A battery pack for electronic cigarettes, characterized in that: Equipped with a battery and a substrate, The battery is a cylindrical battery, and a positive electrode guide plate and a negative electrode guide plate are respectively arranged on the positive terminal and the negative terminal at both ends of the battery, and the positive electrode guide plate and the negative electrode guide plate are bent toward the cylindrical surface of the battery and extend toward the opposite electrode. At least a portion of the positive electrode guide plate and / or the negative electrode guide plate extending toward the opposite electrode is in contact with the cylindrical surface of the battery. The substrate is electrically connected to the positive electrode conductor and the negative electrode conductor, The length of the substrate is smaller than the length of the battery, and the substrate is not in direct contact with the cylindrical surface of the battery.

2. The electronic cigarette battery pack according to claim 1, wherein: The battery has a length of 49 mm or more and 50 mm or less.

3. The electronic cigarette battery pack according to claim 1 or 2, wherein: A battery control module is arranged on the substrate.

4. The electronic cigarette battery pack according to claim 1 or 2, wherein: The battery is of 18500 type.

5. The electronic cigarette battery pack according to claim 1 or 2, wherein: The substrate is inserted under the positive electrode guide plate and the negative electrode guide plate in an insertion assembly manner and is electrically connected to the positive electrode guide plate and the negative electrode guide plate by soldering.

6. The electronic cigarette battery pack according to claim 1 or 2, wherein: The distance between the substrate and the cylindrical surface of the battery is greater than 0 mm and less than 1 mm.

7. The electronic cigarette battery pack according to claim 1 or 2, wherein: An insulating layer is arranged between the substrate and the cylindrical surface of the battery.

8. The electronic cigarette battery pack according to claim 1 or 2, wherein: The battery is a secondary battery.

9. The electronic cigarette battery pack according to claim 1 or 2, wherein: The substrate is made of phenolic resin or epoxy resin.

10. The electronic cigarette battery pack according to claim 1 or 2, wherein: The positive electrode guide plate and / or the negative electrode guide plate are adhered and fixed on the cylindrical surface of the battery by a high temperature resistant insulating tape.

Images