Wireless rechargeable battery and mobile equipment

Abstract

The utility model discloses a wireless charging type battery. The wireless charging type battery comprises a steel shell, a battery cell and a wireless charging coil, the steel shell comprises a positive pole and a steel shell main body, the positive pole is arranged on the steel shell main body, and the positive pole is insulated from the steel shell main body; the battery cell is provided with a positive tab and a negative tab, the positive tab is electrically connected with the positive column, and the negative tab is electrically connected with the steel shell main body; the wireless charging coil is arranged on the outer side of the steel shell, the wireless charging coil is provided with a wire outer end part and a wire inner end part, the wire inner end part is electrically connected with the steel shell main body, and the wire outer end part can be conductively communicated with the positive pole. The utility model further discloses a mobile device adopting the wireless charging type battery.

Description

Technical Field

[0001] The utility model relates to the field of batteries, in particular to a wireless charging battery and a mobile device. Background Art

[0002] With the popularization of wireless charging for mobile devices such as mobile phones, an existing solution is to set a wireless charging coil on the outside of the battery, the battery shell is provided with a positive pole and a negative pole, the outermost circle of the wireless charging coil is provided with an external lead wire extending outward, and the innermost circle of the wireless charging coil is provided with an internal lead wire, the internal lead wire crosses the wireless charging coil and extends outward to the outside of the wireless charging coil, the external lead wire and the internal lead wire are respectively connected to the positive pole and the negative pole, so that the battery can be charged, and a magnetic barrier is set on the side of the battery close to the wireless charging coil to prevent the magnetic field from heating other parts of the mobile phone. The production process of setting a magnetic barrier on the outside of the battery shell and then assembling the wireless charging coil is relatively complicated and has low production efficiency. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a wireless charging battery, which reduces the thickness of the wireless charging coil, simplifies the production process, and improves the production efficiency.

[0004] The utility model also provides a mobile device adopting the wireless charging battery.

[0005] According to the wireless charging type battery of the first aspect of the utility model, it includes a steel shell, a battery cell and a wireless charging coil. The steel shell includes a positive pole and a steel shell body, the positive pole is arranged on the steel shell body, and the positive pole is insulated from the steel shell body; the battery cell is provided with a positive pole ear and a negative pole ear, the positive pole ear is electrically connected to the positive pole, and the negative pole ear is electrically connected to the steel shell body; the wireless charging coil is arranged on the outside of the steel shell, the wireless charging coil is provided with an outer end portion of a wire and an inner end portion of a wire, the inner end portion of the wire is electrically connected to the steel shell body, and the outer end portion of the wire can be electrically connected to the positive pole.

[0006] The wireless rechargeable battery according to the embodiment of the first aspect of the utility model has at least the following beneficial effects: the steel shell body is used as the negative electrode of the battery, and the positive electrode column is used as the positive electrode of the battery. Since the inner end of the wire of the wireless charging coil is directly connected to the steel shell body, there is no need to set an internal lead wire, thereby reducing the thickness of the wireless charging coil. Moreover, due to the certain magnetic resistance of the steel shell, there is no need to set an additional magnetic resistance sheet, and the wireless charging coil can be directly assembled on the outside of the steel shell, thereby simplifying the production process and improving production efficiency.

[0007] According to some embodiments of the utility model, the steel shell body includes a bottom shell and a cover plate, the bottom shell is provided with a receiving groove, the battery cell is located in the receiving groove, the cover plate is arranged on the bottom shell and covers the notch of the receiving groove, and the wireless charging coil is arranged on the cover plate.

[0008] According to some embodiments of the present invention, the inner end of the wire of the wireless charging coil is welded to the cover plate.

[0009] According to some embodiments of the present utility model, the cover plate is provided with a pressure relief valve, and the pressure relief valve is spaced apart from the wireless charging coil.

[0010] According to some embodiments of the present invention, a welding flange is provided around the notch of the accommodating groove, and the cover plate is welded to the bottom shell.

[0011] According to some embodiments of the present invention, when the input power K of the wireless charging coil is 50 W and the wall thickness A of the bottom shell is 125 μm, the thickness B of the cover plate is ≥75 μm.

[0012] According to some embodiments of the present invention, the wireless charging coil includes a spiral coil and an external lead wire connected to the outer end of the spiral coil, the inner end of the wire is located at the inner end of the spiral coil, and the outer end of the wire is arranged at the outer end of the external lead wire.

[0013] According to some embodiments of the present invention, the cross-sectional area of ​​the inner end of the wire of the wireless charging coil is larger than the cross-sectional area of ​​other positions of the wireless charging coil.

[0014] According to some embodiments of the present invention, the steel shell is a rectangular parallelepiped structure.

[0015] The mobile device according to the second embodiment of the present invention includes the above-mentioned wireless rechargeable battery.

[0016] The mobile device according to the embodiment of the second aspect of the utility model has at least the following beneficial effects: due to the use of the above-mentioned wireless rechargeable battery, the battery capacity of the mobile device can be larger, the battery life can be better, and the production process is simplified.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 It is a front view schematic diagram of a wireless rechargeable battery according to an embodiment of the utility model;

[0020] Figure 2 A schematic top view of a wireless rechargeable battery according to an embodiment of the utility model;

[0021] Figure 3 It is a three-dimensional schematic diagram of a wireless rechargeable battery according to an embodiment of the utility model.

[0022] Reference numerals:

[0023] Steel shell 100, positive pole 110, bottom shell 120, welding flange 121, cover plate 130, pressure relief valve 140;

[0024] Wireless charging coil 200 , wire outer end 210 , wire inner end 220 , spiral coil 230 , external lead wire 240 . DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0028] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0029] With the popularization of wireless charging for mobile devices such as mobile phones, an existing solution is to set a wireless charging coil 200 on the outside of the battery, the battery shell is provided with a positive pole 110 and a negative pole, the outermost circle of the wireless charging coil 200 is provided with an outer lead wire 240 extending outward, the innermost circle of the wireless charging coil 200 is provided with an inner lead wire, the inner lead wire crosses the wireless charging coil 200 and extends outward to the outside of the wireless charging coil 200, the outer lead wire 240 and the inner lead wire are respectively connected to the positive pole 110 and the negative pole, so that the battery can be charged, and a magnetic barrier is set on the side of the battery close to the wireless charging coil 200 to prevent the magnetic field from heating other parts of the mobile phone. The production process of setting a magnetic barrier on the outside of the battery shell and then assembling the wireless charging coil 200 requires two processes, which are relatively complicated and have low production efficiency.

[0030] Reference Figures 1 to 3 , which is a wireless charging type battery of an embodiment of the utility model, comprises a steel shell 100, a battery cell and a wireless charging coil 200. The steel shell 100 comprises a positive pole 110 and a steel shell body, wherein the positive pole 110 is arranged on the steel shell body, and the positive pole 110 is insulated from the steel shell body; the battery cell is provided with a positive pole ear and a negative pole ear, wherein the positive pole ear is electrically connected to the positive pole 110, and the negative pole ear is electrically connected to the steel shell body; the wireless charging coil 200 is arranged outside the steel shell 100, and the wireless charging coil 200 is provided with a wire outer end 210 and a wire inner end 220, wherein the wire inner end 220 is electrically connected to the steel shell body, and the wire outer end 210 can be electrically connected to the positive pole 110.

[0031] The steel shell body is used as the negative electrode of the battery, and the positive electrode column 110 is used as the positive electrode of the battery. Since the inner end 220 of the wire of the wireless charging coil 200 is directly connected to the steel shell body, there is no need to set an inner lead wire, thereby reducing the thickness of the wireless charging coil 200. Moreover, since the steel shell 100 has a certain magnetic resistance ability, there is no need to set an additional magnetic resistance sheet. The wireless charging coil 200 can be directly assembled on the outside of the steel shell 100, thereby simplifying the production process and improving production efficiency.

[0032] Specifically, since there is no need to additionally provide a magnetic blocking sheet, in some embodiments, this solution also has the effect of making the size of the steel shell 100 larger, thereby increasing the battery capacity.

[0033] In the embodiment, the steel shell body includes a bottom shell 120 and a cover plate 130. The bottom shell 120 is provided with a receiving groove, the battery cell is located in the receiving groove, the cover plate 130 is provided on the bottom shell 120 and covers the notch of the receiving groove, and the wireless charging coil 200 is provided on the cover plate 130. Since the cover plate 130 is a flat plate, no additional stamping is required, so the wireless charging coil 200 is provided on the cover plate 130, which can facilitate processing and assembly, and simplify the structure and production process of the wireless rechargeable battery.

[0034] In the embodiment, the inner end 220 of the wire of the wireless charging coil 200 is welded to the cover plate 130. The inner end 220 of the wire is directly connected to the cover plate 130 by welding, which further simplifies the connection structure between the wireless charging coil 200 and the cover plate 130, and makes the conductivity between the inner end 220 of the wire and the cover plate 130 better. It is conceivable that the inner end 220 of the wire of the wireless charging coil 200 can also be connected to the cover plate 130 by gluing or the like, and electrically connected to the cover plate 130; or the inner end 220 of the wire is connected to the terminal, and the terminal is screwed to the cover plate 130 to achieve electrical connection between the inner end 220 of the wire and the cover plate 130.

[0035] In the embodiment, the cover plate 130 is provided with a pressure relief valve 140, and the pressure relief valve 140 is spaced apart from the wireless charging coil 200. When an unexpected situation occurs during the use of the battery, it is possible that the internal pressure of the steel shell 100 is too high. At this time, the pressure relief valve 140 can be opened and release the internal pressure of the battery, thereby preventing the battery from exploding; the pressure relief valve 140 and the wireless charging coil 200 are spaced apart, so that the high-pressure fluid released through the pressure relief valve 140 will not directly impact the wireless charging coil 200, thereby reducing the damage to the wireless charging coil 200.

[0036] Specifically, the spacing distance between the pressure relief valve 140 and the wireless charging coil 200 can be specifically configured according to actual needs of those skilled in the art, and is not limited here.

[0037] It is conceivable that, in some embodiments, the wireless charging coil 200 may also be arranged on the outside of the bottom shell 120, in which case the inner end 220 of the wire of the wireless charging coil 200 may also be directly welded to the outside of the bottom shell 120; or the wireless charging coil 200 is arranged across the bottom shell 120 and the cover plate 130, and the inner end 220 of the wire is welded to the outside of the bottom shell 120 or the outside of the cover plate 130; the setting position of the wireless charging coil 200 can be specifically configured by those skilled in the art according to actual needs, and is not limited to being set on the outside of the cover plate 130.

[0038] In the embodiment, a welding flange 121 is provided around the notch of the receiving groove, and the cover plate 130 is welded to the bottom shell 120. The welding flange 121 is provided to facilitate the welding connection between the periphery of the cover plate 130 and the periphery of the notch of the receiving groove to form a sealed shell.

[0039] In the embodiment, when the input power K of the wireless charging coil 200 is 50W and the wall thickness A of the bottom shell 120 is 125μm, the thickness B of the cover plate 130 is ≥75μm. The inner end 220 of the wire of the wireless charging coil 200 is connected to the cover plate 130, and the cover plate 130 is used as the negative electrode of the battery. When the wireless charging coil 200 is used to charge the battery, if the thickness of the cover plate 130 is too small, the current carrying capacity of the cover plate 130 is insufficient, resulting in serious local heating, affecting the safety of the battery. If the thickness of the cover plate 130 is too large, it is easy to cause material waste and affect the battery capacity. Experiments were conducted on this:

[0040]

[0041] From the above test results, it can be seen that when the input power K of the wireless charging coil 200 is 50W, the wall thickness A of the bottom shell 120 is 125μm, and the thickness B of the cover plate 130 is ≥ 75μm, the local temperature of the steel shell 100 is not high and the variation is small, which meets the normal use requirements. When the thickness of the cover plate 130 is less than 75μm, it is easy to cause serious local heating of the steel shell 100, affecting the safety of battery use.

[0042] In an embodiment, the wireless charging coil 200 includes a spiral coil 230 and an external lead wire 240 connected to the outer end of the spiral coil 230, the inner end 220 of the wire is located at the inner end of the spiral coil 230, and the outer end 210 of the wire is arranged at the outer end of the external lead wire 240. The outer end 210 of the wire of the wireless charging coil 200 is connected to the external circuit board, and the positive pole 110 of the battery is electrically connected to the external circuit board, so that the outer end 210 of the wire can be electrically connected to the positive pole 110 of the battery, so as to realize wireless charging of the battery. The above-mentioned wireless charging coil 200 has a simple structure and a small single-layer thickness.

[0043] Specifically, the wireless charging coil 200 can be made of enameled wire or FPC wire, and those skilled in the art can configure it according to actual needs.

[0044] In the embodiment, the cross-sectional area of ​​the inner end 220 of the wire of the wireless charging coil 200 is larger than the cross-sectional area of ​​other positions of the wireless charging coil 200. Since the conductivity of the steel shell 100 is not as good as the wire of the wireless charging coil 200, increasing the cross-sectional area of ​​the inner end 220 of the wire can reduce the resistance of the welding point between the inner end 220 of the wire and the steel shell 100, thereby suppressing local excessive heating. Specifically, the degree of increase in the cross-sectional area of ​​the inner end 220 of the wire can be specifically configured by the technology in the art according to the actual charging power requirements.

[0045] In the embodiment, the steel shell 100 is a rectangular parallelepiped structure, the battery capacity is relatively large, and it is convenient to set the wireless charging coil 200 on the outside.

[0046] Specifically, the positive electrode column 110 and the steel shell body are insulated by an insulating gasket.

[0047] Specifically, the battery cell of the present invention may adopt a laminated battery cell or a wound battery cell, and those skilled in the art may configure the battery cell according to actual needs.

[0048] Specifically, a liquid injection hole is opened on the bottom shell 120. When the battery cell is installed in the receiving groove of the bottom shell 120 and the bottom shell 120 is welded to the cover plate 130, the excess welding flange 121 can be cut off and the electrolyte is injected into the steel shell 100. After a series of processes, the battery preparation is completed after passing the inspection.

[0049] The utility model also provides a mobile device, which adopts the wireless charging battery. Due to the adoption of the wireless charging battery, the battery capacity of the mobile device can be larger, the battery life can be better, and the production process can be simplified.

[0050] Specifically, common mobile devices may be mobile phones, tablet computers, smart wearable devices, and laptop computers, etc., which are not limited here.

[0051] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0052] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A wireless rechargeable battery, characterized in that: include: A steel shell (100) comprises a positive electrode column (110) and a steel shell body, wherein the positive electrode column (110) is arranged on the steel shell body, and the positive electrode column (110) is insulated from the steel shell body; The battery cell is provided with a positive electrode ear and a negative electrode ear, wherein the positive electrode ear is electrically connected to the positive electrode column (110), and the negative electrode ear is electrically connected to the steel shell body; A wireless charging coil (200) is arranged outside the steel shell (100), and the wireless charging coil (200) is provided with an outer end portion (210) of a wire and an inner end portion (220) of a wire, wherein the inner end portion (220) of the wire is electrically connected to the main body of the steel shell, and the outer end portion (210) of the wire can be electrically connected to the positive electrode column (110).

2. The wireless rechargeable battery according to claim 1, characterized in that: The steel shell body comprises a bottom shell (120) and a cover plate (130); the bottom shell (120) is provided with a receiving groove, the battery cell is located in the receiving groove, the cover plate (130) is arranged on the bottom shell (120) and covers a notch of the receiving groove, and the wireless charging coil (200) is arranged on the cover plate (130).

3. The wireless rechargeable battery according to claim 2, characterized in that: The inner end portion (220) of the wire of the wireless charging coil (200) is welded and connected to the cover plate (130).

4. The wireless rechargeable battery according to claim 2, characterized in that: The cover plate (130) is provided with a pressure relief valve (140), and the pressure relief valve (140) is spaced apart from the wireless charging coil (200).

5. The wireless rechargeable battery according to claim 2, characterized in that: A welding flange (121) is provided around the notch of the accommodating groove, and the cover plate (130) is connected to the bottom shell (120) by welding.

6. The wireless rechargeable battery according to claim 2, characterized in that: When the input power K of the wireless charging coil (200) is 50 W and the wall thickness A of the bottom shell (120) is 125 μm, the thickness B of the cover plate (130) is ≥ 75 μm.

7. The wireless rechargeable battery according to claim 1, characterized in that: The wireless charging coil (200) comprises a spiral coil (230) and an external lead wire (240) connected to the outer end of the spiral coil (230), the inner end portion (220) of the wire is located at the inner end of the spiral coil (230), and the outer end portion (210) of the wire is arranged at the outer end of the external lead wire (240).

8. The wireless rechargeable battery according to claim 1, characterized in that: The cross-sectional area of ​​the inner end portion (220) of the wire of the wireless charging coil (200) is larger than the cross-sectional area of ​​other positions of the wireless charging coil (200).

9. The wireless rechargeable battery according to claim 1, characterized in that: The steel shell (100) is in a rectangular parallelepiped structure.

10. A mobile device, characterized in that: The invention comprises a wireless rechargeable battery as claimed in any one of claims 1 to 9.

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