JP2011014672A - Battery unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low cost battery unit mainly used for various electronic equipment and for conducting electric connection and disconnection absolutely.SOLUTION: When providing a through-hole 13 to a land 12A and 12B to which an electrode 6 is soldered, a flow-in of a molten solder 7 into the through-hole 13 and an occurrence of a solder ball or the like are prevented in connecting a terminal 15 of the equipment side to the electrode 6, so that no additional step is required to remove this and the battery unit is simply manufactured. In addition, a short circuit or the like between terminals of a switching element 3 and a control element 4 is prevented to obtain a battery unit for conducting electric connection and disconnection absolutely.

Description

  The present invention relates to a battery unit mainly used in various electronic devices.

  In recent years, various electronic devices, particularly mobile devices such as mobile phones and video cameras, are equipped with a rechargeable battery, and various operations have been performed using this battery power source when being carried. There is also a need for an inexpensive battery unit that can reliably make electrical contact and separation.

  Such a conventional battery unit will be described with reference to FIGS.

  FIG. 5 is a cross-sectional view of a conventional battery unit, and FIG. 6 is a perspective view of the battery unit. In FIG. A wiring pattern (not shown) is formed.

  3 is a switching element such as an FET or transistor, 4 is a control element such as an IC, and 5 is an electronic component such as a fixed resistor or a capacitor. These are mounted on a predetermined land 2 on the upper surface of the wiring board 1 by soldering. In addition, the switching element 3, the control element 4, and a plurality of electronic components 5 are connected via a wiring pattern.

  Further, reference numeral 6 denotes a plurality of rectangular plate-like electrodes, 8 denotes a terminal formed from a land, and both ends of the electrode 6 are mounted and connected to the lands 2A and 2B by solder 7, and the left and right electrodes 6 form a wiring pattern. The battery unit is configured by being connected to the switching element 3 via the switch.

  When manufacturing such a battery unit, as shown in the perspective view of FIG. 7A, first, a plurality of lands 2 and 2A, 2B on the upper surface of the wiring board 1 are shown in FIG. As described above, after the cream-like solder 7 is applied by printing or the like, the switching element 3, the control element 4, the terminals of the electronic component 5, and both ends of the electrode 6 are mounted on the upper surface.

  Then, the solder 7 is melted by heating, and the terminals of the switching element 3, the control element 4, and the electronic component 5 and both ends of the electrode 6 are soldered to the lands 2, 2A, and 2B. The battery unit as shown in FIG. 6 is completed.

  Further, the battery unit configured as described above is housed and mounted in an electronic device such as a mobile phone or a video camera, and as shown in the cross-sectional view of FIG. As shown in FIGS. 8B and 8C, the rectangular plate-shaped terminals 15 are spot-welded by the welding rod 16 so that the switching element 3 and the control element 4 are connected to the terminals 15 and the electrodes 6. The terminal 8 is connected to an electronic circuit (not shown) of the device via a connector (not shown) or the like.

  In the above configuration, when the device is carried, the control element 4 detects the voltage of the battery power supply to control the switching element 3, and power is supplied from the battery to the electronic circuit via the switching element 3. The operation is performed.

  Further, when charging the battery, the control element 4 switches the switching element 3 so that the battery of the device is charged from a charger connected to a household power source, for example, and the battery is charged with a predetermined voltage. When this occurs, the control element 4 detects this, switches the switching element 3 again, and ends the charging of the battery.

  In other words, the control element 4 detects the voltage of the battery power supply, and supplies power from the battery to the electronic circuit via the switching element 3 when in use, and switches the switching element 3 to charge the battery when charging the battery. It was configured to charge the voltage.

  As prior art document information related to the invention of this application, for example, Patent Document 1 is known.

JP 2009-9969 A

  However, in the conventional battery unit, as shown in FIG. 8C, when spot welding of the electrode 6 and the terminal 15 is performed, the solder 7 at both ends of the electrode 6 is caused by heat and pressure applied by the welding rod 16. While melting, the electrode 6 is pressed and moved downward. At this time, the solder 7 flowing out from the upper surface of the land 2A or 2B is generated as a spherical solder ball 7A on the upper surface of the nearby wiring board 1. In order to prevent problems such as a short circuit between the terminals of the switching element 3 and the control element 4 due to the solder ball 7A, it is necessary to remove the solder ball 7A using a separate brush or tweezers. There was a problem that it would take time to connect.

  An object of the present invention is to solve such a conventional problem, and an object thereof is to provide a battery unit that can be manufactured easily, is inexpensive, and can be securely connected and disconnected.

  In order to achieve the above object, the present invention comprises a battery unit by forming a through hole in a land to which an electrode is soldered, and when connecting a terminal on the device side to the electrode, Since it can flow into the through-hole and prevent solder balls from being generated, there is no need to remove it separately, making it easy to manufacture and preventing short-circuits between the terminals of switching elements and control elements. And it has the effect | action that the battery unit which can perform reliable electrical contact / separation can be obtained.

  As described above, according to the present invention, it is possible to obtain an advantageous effect that it is possible to realize a battery unit that is inexpensive and capable of performing reliable electrical contact and separation.

Sectional drawing of the battery unit by one embodiment of this invention Same perspective view Same perspective view Cross section Sectional view of a conventional battery unit Same perspective view Same perspective view Cross section

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  In addition, the same code | symbol is attached | subjected to the part of the structure same as the structure demonstrated in the term of background art, and detailed description is simplified.

(Embodiment)
FIG. 1 is a cross-sectional view of a battery unit according to an embodiment of the present invention, FIG. 2 is a perspective view thereof, in which 11 is a wiring board such as paper phenol or epoxy containing glass, and copper foil is provided on the upper and lower surfaces. Thus, a plurality of substantially rectangular lands 12 and a plurality of wiring patterns (not shown) connecting them are formed.

  3 is a switching element such as an FET or transistor, 4 is a control element such as an IC, and 5 is an electronic component such as a fixed resistor or a capacitor. These are mounted on a predetermined land 12 on the upper surface of the wiring board 11 by soldering. In addition, the switching element 3, the control element 4, and a plurality of electronic components 5 are connected via a wiring pattern.

  Reference numeral 6 denotes a rectangular plate having a plurality of electrodes such as nickel. Reference numeral 8 denotes a terminal formed from a land. Both ends of the electrode 6 are mounted and connected to the lands 12A and 12B by solder 7, and the left and right electrodes 6 are connected to each other. It is connected to the switching element 3 through a wiring pattern.

  Further, the lands 12A and 12B to which the electrodes 6 are soldered are provided with a plurality of through holes 13 in which copper or the like is plated on the inner periphery of a hole penetrating the upper and lower surfaces of the wiring board 11, and the battery Unit is configured.

  When manufacturing such a battery unit, as shown in the perspective view of FIG. 3A, first, a plurality of lands 12 and 12A, 12B on the upper surface of the wiring board 11 are shown in FIG. As described above, after the cream-like solder 7 is applied by printing or the like, the switching element 3, the control element 4, the terminals of the electronic component 5, and both ends of the electrode 6 are mounted on the upper surface.

  Then, the solder 7 is melted by heating, and the terminals of the switching element 3, the control element 4, the electronic component 5, and both ends of the electrode 6 are soldered to the lands 12, 12 </ b> A, 12 </ b> B. The battery unit as shown in 2 is completed.

  As shown in FIG. 3A, the lands 12A and 12B are formed with a plurality of through holes 13 penetrating the upper and lower surfaces of the wiring board 11. However, when the electrodes 6 are soldered, The upper surface of the through hole 13 is covered with the solder 7.

  The battery unit configured as described above is housed and mounted in an electronic device such as a mobile phone or a video camera, and as shown in the cross-sectional view of FIG. As shown in FIGS. 4B and 4C, rectangular plate-like terminals 15 are overlapped and spot-welded with a welding rod 16 so that the switching element 3 and the control element 4 are connected to the terminals 15 and the electrodes 6. The terminal 8 is connected to an electronic circuit (not shown) of the device via a connector (not shown) or the like.

  At this time, as shown in FIG. 4C, the solder 7 at both ends of the electrode 6 is melted by the heat and pressure applied by the welding rod 16, and the electrode 6 is pressed downward, but the lands 12A and 12B Since the plurality of through holes 13 are formed, the melted solder 7 does not flow outward from the top surfaces of the lands 12A and 12B but flows into the plurality of through holes 13.

  That is, by providing the through holes 13 in the lands 12A and 12B to which the electrodes 6 are soldered, the molten solder 7 does not flow outward, and therefore, a spherical solder ball or the like is formed on the upper surface of the nearby wiring board 11. Since it does not occur, there is no need to remove this separately using a brush, tweezers, etc., and it is possible to connect to the equipment without extra effort.

  In the above configuration, when the device is carried, the control element 4 detects the voltage of the battery power supply to control the switching element 3, and power is supplied from the battery to the electronic circuit via the switching element 3. When the operation is performed and the battery is consumed and becomes a predetermined voltage, for example, about 2 to 2.3 V or less, the control element 4 switches the switching element 3 to stop the power supply to the electronic circuit.

  Further, when charging the battery, the control element 4 switches the switching element 3 so that the battery of the device is charged from a charger connected to a household power source, for example, and the battery is charged with a predetermined voltage. Then, for example, when the voltage of the battery becomes about 4.3 V or higher, the control element 4 detects this, switches the switching element 3 again, and ends the charging of the battery.

  In other words, the control element 4 detects the voltage of the battery power supply, and supplies power from the battery to the electronic circuit via the switching element 3 when in use, and switches the switching element 3 to charge the battery when charging the battery. It is configured to charge the voltage.

  At this time, as described above, by providing the through holes 13 in the lands 12A and 12B to which the electrodes 6 are soldered, when the terminal 15 on the device side is connected to the electrodes 6, the molten solder 7 is passed through. Since it does not flow into the hole 13 and a spherical solder ball or the like is generated, it does not take time to remove it separately using a brush or tweezers, and can be easily manufactured.

  In addition, by preventing the occurrence of solder balls or the like when connecting the device-side terminal 15 to the electrode 6 in this way, it is possible to prevent a short circuit between the terminals of the switching element 3 and the control element 4 in the unlikely event. The unit is configured so as to enable reliable electrical contact / separation of the unit.

  In the case of the wiring board 11 having a plurality of wiring patterns on the upper and lower surfaces as described above, since a plurality of through holes are usually formed to connect the wiring patterns on the upper surface and the lower surface, The through hole 13 provided in 12B may be formed at the same time as these, and the through hole 13 can be easily formed without taking any troubles such as post-processing.

  As described above, according to the present embodiment, when the through-hole 13 is provided in the lands 12A and 12B to which the electrode 6 is soldered, when the device-side terminal 15 is connected to the electrode 6, the molten solder 7 is Since it can flow into the through hole 13 to prevent the generation of solder balls and the like, it can be easily manufactured without the trouble of separately removing it, and between the terminals of the switching element 3 and the control element 4. It is possible to obtain a battery unit capable of preventing a short circuit and the like and performing reliable electrical contact and separation.

  The battery unit according to the present invention is inexpensive and can be used for reliable electrical contact and separation, and is useful as a battery unit for various electronic devices.

DESCRIPTION OF SYMBOLS 3 Switching element 4 Control element 5 Electronic component 6 Electrode 7 Solder 8 Terminal 11 Wiring board 12, 12A, 12B Land 13 Through hole 15 Terminal 16 Welding rod

Claims (1)

A wiring board on which a plurality of lands and wiring patterns are formed, a switching element for switching battery power, a control element for detecting the voltage of the battery and controlling the switching element, and an electrode soldered to the land A battery unit in which a through hole is formed in a land to which the electrode is soldered.

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