JP3448456B2 - Battery pack - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention incorporates a battery, a printed circuit board, and a terminal holder for positioning an electrode terminal in a fixed position, and an electrode mounted on the terminal holder. The present invention relates to a battery pack having terminals exposed outside a case. 2. Description of the Related Art A battery pack contains a secondary battery in a case and is used as a power source for various electronic devices such as a personal computer and a mobile phone. The battery pack is provided with an electrode terminal for extracting power from a built-in secondary battery or for supplying power to the secondary battery to perform charging. The electrode terminal is disposed so as to be exposed on the surface of the case of the battery pack, and is electrically connected to a contact of an electric device or a charger connected to the battery pack. Therefore, it is necessary to position the electrode terminal at an accurate position. This is because a displacement of the electrode terminal causes a contact failure with a contact of an electric device or a charger. The electrode terminals of a battery pack are mounted on a terminal holder formed of resin or the like. The terminal holder on which the electrode terminal is mounted is provided in the case of the battery pack such that the electrode terminal is exposed on the case. The case is provided with a notch, a window, and the like, from which the electrode terminals are exposed. Therefore, if the terminal holder is not disposed at a fixed position in the case, the electrode terminal will be displaced from the window or the like of the case, and will not be able to contact the contacts of the device or the charger. For this reason, it is important to position the terminal holder at an accurate position in the case. Further, when the electrode terminal comes into contact with a contact of a device or a charger, the electrode terminal is pressed toward the inside of the case of the battery pack. For this reason, it is important to securely fix the terminal holder so that the electrode terminal does not retreat from the case window or the like into the case. [0005] Accordingly, the present invention provides
The terminal holder in the battery pack was securely positioned and the electrode terminals were arranged in fixed positions to prevent poor contact between the connected devices and the contacts of the charger, and the contacts were electrically connected to the contacts. It is an object of the present invention to provide a battery pack that can prevent the electrode terminals from being retracted into the case from a window or the like of the case. SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a case in which a battery, a printed circuit board, and a terminal holder for positioning an electrode terminal in a fixed position are incorporated. In the battery pack in which the electrode terminals mounted on the battery pack are exposed outside the case, the printed circuit board is fixed by being fitted into claws provided in the case.
And facing one side of the printed circuit board from the one side
The terminal holder is formed with a concave portion recessed toward the side , while the terminal holder is formed with a positioning protrusion matching the concave portion of the printed circuit board, and the positioning protrusion of the terminal holder is matched with the concave portion of the printed circuit board. the terminal holder is positioned by the side of the printed circuit board
To prevent the electrode terminals from falling into the case.
It is characterized by prevention . According to the present invention, the terminal holder can be positioned at a fixed position by matching the positioning projection formed on the terminal holder with the concave portion provided on one side of the printed circuit board. Further, since the terminal holder is supported by the printed circuit board by the positioning protrusion, even if a pressing force is applied to the electrode terminal, the electrode terminal is prevented from being retracted inward of the case. An embodiment of the present invention will be described with reference to the drawings.
The battery pack of the present invention includes a battery case A and a battery case B that are divided into two parts, and a secondary battery 1 built in the cases A and B.
And the printed circuit board 2. Case A
Is provided with four electrode windows 3 on the side wall portion, and the case B is also provided with four electrode windows 4 on the surface portion. As described above, the battery pack according to the present embodiment has the electrode terminals provided at two places on the surface and the side surface of the battery pack. Can be used selectively. As the secondary battery 1, one flat-shaped lithium ion battery is employed. Lithium-ion batteries have high output and high capacity despite their small size and light weight.
Cells can also be used as power sources for mobile phones and the like. Further, the flat-shaped lithium-ion battery can make the battery pack thinner, and can be made compact without disturbing the miniaturization of the device even when mounted on a portable device. [0010] A battery pack containing a lithium ion battery is provided with a protection circuit in order to prevent deterioration of the battery due to overcharge or overdischarge when charging or discharging.
The protection circuit is mounted on the printed circuit board 2 and connected to the battery 1. The printed circuit board 2 is arranged in parallel with the battery 1. The battery 1 and the printed circuit board 2 are connected by a lead plate or the like, and a temperature protection element 5 inserted between the lead plates is disposed in close contact with the battery 1. The temperature protection element 5 detects the temperature at the time of charging or discharging of the battery 1 and limits the current flowing through the battery 1, thereby preventing the battery from deteriorating and preventing accidents such as abnormal heat generation. Further, the printed circuit board 2 has four electrode terminals 6 on the surface opposite to the surface on which the battery 1 is mounted. 4
The two electrode terminals 6 transmit and receive the state of the battery to input / output terminals connected to the positive and negative poles of the battery 1 and to connected devices and chargers by detecting the voltage and the like of the battery. Signal terminal. In addition, these electrode terminals 6
It is exposed from the electrode window 4 of the case B, and is formed to protrude from the printed board 2 in a U-shape so as to be easily exposed. When the electrode terminal 6 is connected to a device or a charger, a reinforcing rib 7 is formed by folding so that the electrode terminal 6 is not pushed down to the printed circuit board side by being pushed by a contact on the other side. Next, the terminal holder 8 is connected to the printed circuit board 2. The terminal holder 8 is formed of resin, and integrally has four electrode terminals 9 by insert molding. These four electrode terminals 9 are electrically connected to the electrode terminals 6 mounted on the printed circuit board 2 and constitute input / output terminals and signal terminals, respectively, like the electrode terminals 6. The terminal holder 8 is provided with a gap 2 between the electrode terminals 9.
It has two positioning projections 10. On the other hand, two concave portions 11 are provided on one side of the printed circuit board 2, and when the terminal holder 8 is connected to the printed circuit board 2, the positioning projections 10 and the concave portions 11 match, and the terminal holder 8
Can be positioned in a fixed position. For this reason, the electrode terminal 9 of the terminal holder 8
Can be exposed without being displaced from the electrode window 3 provided on the side wall of the case A. Therefore, it is possible to eliminate poor contact due to positional deviation when connecting to a device or a charger. Further, since the terminal holder 8 can be protruded from the printed circuit board 2 by an amount corresponding to the protruding height of the positioning protrusion 10, the protruding height is arbitrarily changed according to the size and shape of the case A in the battery pack. can do. Further, since the terminal holder 8 is supported by one side of the printed circuit board 2, it prevents the electrode terminal 9 from being pushed into the case by the contact on the other side when connecting to a device or a charger. I do. As described above, the battery pack of this embodiment is assembled by mounting the battery 1 and the terminal holder 8 on the printed circuit board 2 and then mounting it on the case B. Here, a nail 12 is formed on the case B, and the printed board 2 is fitted into the nail 12 to fix the printed board 2. Therefore, the printed circuit board 2 can be securely fixed to the case, and the printed circuit board 2 can be prevented from being displaced, and the electrode terminals can be accurately positioned. According to the present invention, the terminal holder can be positioned at a fixed position by matching the positioning projection formed on the terminal holder with the concave portion provided on one side of the printed circuit board. Further, since the terminal holder is supported by the printed circuit board by the positioning protrusion, even if a pressing force is applied to the electrode terminal, the electrode terminal is prevented from being retracted inward of the case. As a result, the electrode terminals are not displaced from the electrode window in which the case is formed, and a contact failure with a connected device or a contact of a charger can be eliminated. Also, even if the battery terminal is pushed by the contact on the other side or the battery pack is accidentally dropped, it is possible to prevent the electrode terminal from retreating into the case from the window of the case.

[Brief description of the drawings] FIG. 1 is an external perspective view of a battery pack. FIG. 2 is a sectional view of a battery pack. FIG. 3 is a perspective view showing a state where a two-piece case is opened. FIG. 4 is an exploded perspective view of a battery pack. FIG. 5 is an exploded perspective view of a battery pack. FIG. 6 is an exploded perspective view of a printed circuit board and a terminal holder. FIG. 7 is a plan view of a printed circuit board and a terminal holder. [Explanation of symbols] 1 Secondary battery 2 Printed circuit board 3 electrode window 4 Electrode window 5 Temperature protection element 6 electrode terminals 7 Reinforcement rib 8 Terminal holder 9 Electrode terminal 10 Positioning protrusion 11 recess 12 claws

Claims (1)

(57) [Claims] [Claim 1] A battery, a printed circuit board, and a terminal holder for positioning the electrode terminal in a fixed position are built in a case, and the electrode terminal mounted on the terminal holder is outside the case. In the battery pack, the printed circuit board is fixed by being fitted into a nail provided in the case.
And facing one side of the printed circuit board from the one side
The terminal holder is formed with a concave portion recessed toward the side , while the terminal holder is formed with a positioning protrusion matching the concave portion of the printed circuit board, and the positioning protrusion of the terminal holder is matched with the concave portion of the printed circuit board. the terminal holder is positioned by the side of the printed circuit board
To prevent the electrode terminals from falling into the case.
A battery pack characterized in that the battery pack is prevented .