JP2011034817A - Battery unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a battery unit mainly used for various electronic equipment which is of reduced cost and can carry out steady electric contact and separation. <P>SOLUTION: The battery unit has a through hole 12 formed on a wiring board 11 at the lower part of an electrode 6, and when a terminal 15 on the equipment side is connected to the electrode 6, a support rod 17 inserted through the through hole 12 is contacted with the lower face of the electrode 6 and, in the state the electrode 6 is held in a prescribed height, spot welding to the terminal 15 is carried out. Thereby, movement of the electrode 6 to the lower part and generation of a solder ball or the like can be prevented, and there involves no time and effort for removing this separately, enabling manufacture easily, while short circuit between the terminals of a switching element 3 and a control element 4 is prevented and steady electric contact and separation can be carried out. <P>COPYRIGHT: (C)2011,JPO&INPIT

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 electronic cameras, are equipped with rechargeable batteries and various operations have been performed using this battery power source when being carried. Also, there is a demand for a battery unit that can be electrically connected and separated at low cost.

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

  FIG. 6 is a cross-sectional view of a conventional battery unit, and FIG. 7 is a perspective view thereof. In FIG. 6, reference numeral 1 denotes a wiring board, and a plurality of lands 2 having a substantially rectangular shape on the upper and lower surfaces and a plurality of lands 2 connecting them. 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 such a battery unit is manufactured, as shown in the perspective view of FIG. 8A, 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. 7 is completed.

  In addition, the battery unit configured as described above is housed and mounted in an electronic device such as a mobile phone or an electronic camera, and as shown in the cross-sectional view of FIG. The rectangular plate-like terminals 15 are overlapped and spot-welded by a welding rod 16 as shown in FIGS. 9B and 9C, 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. 9C, when spot welding is performed between the electrode 6 and the terminal 15 on the equipment side, the heat and pressure applied by the welding rod 16 cause the heat at both ends of the electrode 6. As the solder 7 melts, the electrode 6 is pressed and moved downward. At this time, the solder 7 that has flowed outward from the upper surfaces of the lands 2A and 2B is formed as spherical solder balls 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 is a problem that it takes time and effort to connect to the device.

  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 forms a battery unit by forming a through hole in a wiring board below the electrode. When connecting a terminal on the device side to the electrode, for example, from the through hole below the electrode, Inserting the holding rod, bringing the holding rod into contact with the lower surface of the electrode, and performing spot welding with the terminal with the electrode held at a predetermined height, it is possible to move the electrode downward and generate solder balls. Therefore, it can be easily manufactured without the need to remove it separately, and short circuit between the terminals of the switching element and the control element can be prevented and reliable electrical contact and separation can be performed. It has the effect | action that the battery unit which can be obtained 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 Cross section Sectional view of a conventional battery unit Same perspective view Same perspective view Cross section

  Embodiments of the present invention will be described below 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. A plurality of substantially rectangular lands 2 and a plurality of wiring patterns (not shown) connecting these lands 2 are formed.

  Also, 3 is a switching element such as an FET or a 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 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 of a land. 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 are connected to each other. It is connected to the switching element 3 through a wiring pattern.

  Further, a plurality of through holes 12 penetrating the upper and lower surfaces of the wiring board 11 are formed between the lands 2A and 2B of the wiring board 11 below the left and right electrodes 6 to constitute a battery unit.

  When manufacturing such a battery unit, as shown in the perspective view of FIG. 3A, first, a plurality of lands 2 and 2A, 2B 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, 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 2 is completed.

  In addition, the battery unit configured in this manner is housed and mounted in an electronic device such as a mobile phone or an electronic camera, and as shown in the cross-sectional views of FIGS. 5A and 5B, A rectangular plate-like terminal 15 on the device side is superimposed on the electrode 6 and spot-welded with a welding rod 16 so that the switching element 3, the control element 4, etc. are connected to a battery (not shown) via the terminal 15 and the electrode 6. In addition to being connected, 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 the sectional view of FIG. 4A, holding rods 17 are inserted into the through holes 12 between the lands 2A and 2B below the left and right electrodes 6 from below the wiring board 11, As shown in FIG. 4B, the holding rod 17 is inserted through the through hole 12, and the upper end surface comes into contact with the lower surface of the electrode 6.

  Then, as shown in FIG. 5A, equipment-side terminals 15 are superimposed on the upper surfaces of the left and right electrodes 6 and spot-welded with a welding rod 16 as shown in FIG. 15 is connected.

  At this time, as shown in FIG. 5B, the heat 7 and the pressure applied by the welding rod 16 melt the solder 7 at both ends of the electrode 6 and press the electrode 6 downward. Since the holding rod 17 inserted through the through hole 12 abuts and spot welding is performed with the terminal 15 while the electrode 6 is held at a predetermined height, the melted solder 7 is removed from the upper surface of the land 2A or 2B. It doesn't flow out.

  Accordingly, since the solder 7 that has flowed out does not cause a spherical solder ball or the like on the upper surface of the wiring board 11 in the vicinity of the lands 2A and 2B, there is no need to separately remove this using a brush or tweezers. In addition, the electrode 6 and the terminal 15 on the device side can be connected.

  In other words, the through hole 12 is provided in the wiring substrate 11 below the electrode 6, and when the electrode 6 and the device side terminal 15 are connected, the holding rod 17 is inserted through the through hole 12, and the holding rod 17 is inserted into the electrode 6. By contacting the lower surface and suppressing the downward movement of the electrode 6 due to the pressing of the welding rod 16, the molten solder 7 is prevented from flowing out from the upper surfaces of the lands 2A and 2B, and the generation of solder balls and the like is prevented. It is configured.

  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, when the terminal 15 on the device side is connected to the electrode 6, the through hole 12 through which the holding bar 17 is inserted is provided in the wiring substrate 11 below the electrode 6, thereby holding the holding bar 17. Is pressed against the lower surface of the electrode 6 to suppress the downward movement of the electrode 6 due to the pressing of the welding rod 16, and spot welding with the terminal 15 can be performed with the electrode 6 held at a predetermined height. It can be easily manufactured without the need to remove it and remove it separately.

  In addition, by preventing the generation of solder balls and the like when connecting the terminal 15 on the device side to the electrode 6 in this way, a short circuit between the terminals of the switching element 3 and the control element 4 due to the solder balls or the like is prevented. The battery unit is configured to be surely electrically connected and separated.

  The holding rod 17 inserted through the through-hole 12 when the electrode 6 and the terminal 15 are connected is formed of a resin that can be elastically deformed to some extent, or the holding rod 17 is biased upward by a spring or the like. The electrode 6 can be more reliably held at a predetermined height.

  As described above, according to the present embodiment, when the through hole 12 is formed in the wiring substrate 11 below the electrode 6 and the terminal 15 on the device side is connected to the electrode 6, the holding rod 17 inserted through the through hole 12 is connected to the electrode. 6 by contacting the lower surface and spot welding with the terminal 15 in a state where the electrode 6 is held at a predetermined height, thereby preventing the downward movement of the electrode 6 and the generation of solder balls, etc. A battery unit that can be easily manufactured without the need to remove this separately, and that can prevent electrical shorting between the terminals of the switching element 3 and the control element 4 and can perform reliable electrical connection / disconnection. It can be obtained.

  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.

2, 2A, 2B Land 3 Switching element 4 Control element 5 Electronic component 6 Electrode 7 Solder 8 Terminal 11 Wiring board 12 Through-hole 15 Terminal 16 Welding rod 17 Holding 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 the wiring board below the electrode.

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