JP5944203B2 - Battery pack - Google Patents

Description

  The present invention relates to a portable battery pack that includes a built-in battery that can be charged and further includes a connector that supplies power to a battery-driven device connected to the outside.

  A battery pack having a pair of cylindrical batteries built therein has been developed (see Patent Document 1). The battery pack shown in this publication is a pack type used as a portable power source, and an exploded perspective view thereof is shown in FIG. In this battery pack, an insulating holder 903 is disposed between a pair of cylindrical batteries 901, and the cylindrical battery 901 and the substrate circuit 904 are disposed at a fixed position by the insulating holder 903, thereby forming a battery assembly 909. A battery assembly 909 is housed in an outer case 902.

  This battery pack is a thick type because a cylindrical battery is used. In addition, as plate-shaped slate PCs (tablet terminals) have become widespread, thin battery packs that can be carried with such tablet terminals are also required. In the thin battery pack, a lithium polymer battery or the like is used instead of the cylindrical battery. Unlike a cylindrical battery, such a lithium polymer battery does not have a metal outer can, and thus requires a mechanism for protecting it from external forces and the like.

  However, as the battery pack becomes thinner, the mechanical strength also decreases. On the other hand, it is conceivable that the case is made of metal instead of resin to increase the strength. However, in order to insulate the output terminals and the like, the surface on which these terminals are provided cannot be made of metal.

JP 2009-131089 A

  The present invention has been made to solve such conventional problems. A main object of the present invention is to provide a battery pack capable of protecting a built-in secondary battery while reducing the external appearance.

Means for Solving the Problems and Effects of the Invention

In order to achieve the above object, according to the battery pack of the first aspect of the present invention, the battery pack can be connected to a battery-driven device and can supply power to a device-side secondary battery built in the battery-driven device. An insulating plate having a width larger than the thickness, an upper surface, a lower surface opposite to the upper surface, a first side surface located between the upper surface and the lower surface, and the first side surface, A main body case having an intersecting second side surface, a third side surface opposite to the first side surface, and a fourth side surface intersecting with the third side surface, and a plate-like chargeable built in the main body case One or more secondary battery cells, a metal upper plate covering the upper surface of the main body case, a metal lower plate covering the lower surface of the main body case, and the secondary battery cells are electrically connected. A circuit board mounted on the circuit board, and the secondary battery cell and the battery. And a connector part for outputting the electric power discharged from the secondary battery cell to the outside, and the secondary battery cell is disposed so as to face the third side surface in the main body case The circuit board is disposed in the main body case between the secondary battery cell and the first side surface, and the upper plate is disposed in the main body case. A side surface covering portion that covers the second side surface, the third side surface, and the fourth side surface is integrally provided continuously from the first flat surface portion that covers the upper surface of the main body case. An edge covering portion covering the four corners of the rectangular shape is included, and on the first side surface of the main body case, the left and right sides are covered with the edge covering portion, and the side surface covering portion is opened between the edge covering portions. to, it is possible to position the said connector portion to an open mouth portion .

  With the above configuration, while the battery pack has a thin appearance, the main body case is covered with a metal upper plate and lower plate, and a side surface covering portion is provided in the thickness direction, thereby providing rigidity against bending of the main body case. The mechanical strength can be improved. On the other hand, by opening the first side surface and providing the connector part, the electrical connection with the external device is not hindered, while the first side surface with the side surface covering part opened is separated from the secondary battery. And by arrange | positioning a secondary battery to the 3rd side surface reinforced with the side surface covering part, even if external force is applied to a main body case, a secondary battery can be protected with a side surface covering part.

  Moreover, according to the battery pack which concerns on a 2nd side surface, the operation part which operates discharge of the said secondary battery cell, and the display part which shows a charge / discharge state can be provided in the 1st side surface of the said main body case.

  By arranging all necessary members including the input / output connector on the first side with the above configuration, the second side, third side, and fourth side can all be covered with the upper plate, and the three sides are made of metal. The mechanical strength can be improved by coating with the plate material.

  Furthermore, according to the battery pack according to the third aspect, the main body case can be provided with board ribs that contact the circuit board disposed facing the first side face.

  According to the above configuration, the first side surface side where the metal side surface covering portion is not provided can be reinforced with the ribs for the substrate, thereby preventing deformation of the main body case and protecting the secondary battery cell from external force.

  Furthermore, according to the battery pack of the fourth aspect, a plurality of the secondary battery cells are arranged adjacent to each other in the main body case, and the main body case is interposed between the secondary battery cells. Battery ribs having insulating properties and heat insulating properties can be provided.

  By the said structure, the heat insulation between the secondary battery cells arrange | positioned adjacently can be improved, and even if one secondary battery cell becomes high temperature, it can suppress affecting another secondary battery cell.

Further, according to the battery pack of the fifth aspect, the distance between the second side surface and the fourth side surface of the main body case facing each other is longer than the distance between the first side surface and the third side surface, and the upper plate It is at the edge of the side surface covering portion that covers the side surface covering portion and the fourth side surface covering the second side, and provided with a plate rib locking projecting to the main body case side, the serial body case, A locking groove for locking the plate rib can be formed.

  With the above configuration, the upper plate can be securely fixed to the main body case. In particular, even if the battery pack receives an external force so as to bend in the longitudinal direction, the plate ribs act so as to further bite into the locking grooves at the second side surface covering portion and the fourth side surface covering portion facing on both sides. The plate can be prevented from coming off from the main body case, so that the built-in secondary battery cell can be protected and the reliability can be improved.

  Furthermore, according to the battery pack of the sixth aspect, bent cover protrusions are provided at a plurality of positions on the edge of the lower plate, and the main body case inserts the cover protrusions. A plurality of slits are opened, and the cover projection can be bent and the lower plate can be fixed to the main body case with the cover projection inserted into the slit.

  With the above configuration, the lower plate can be easily fixed to the main body case.

  Furthermore, according to the battery pack according to the seventh aspect, the main body case can be provided with box-shaped ribs around the slit.

  With the above configuration, by surrounding the cover protrusion with the box-shaped rib, the distance from the circuit board can be increased, creeping discharge can be suppressed, and the circuit board can be protected.

  Furthermore, according to the battery pack of the eighth aspect, the circuit board has a notch along the outer shape of the connector part, and the connector part is arranged in the notch of the circuit board. be able to.

  The above configuration provides an advantage that the battery pack can be thinned by the thickness of the circuit board, compared to the configuration in which the connector portion is mounted on the circuit board.

  Furthermore, according to the battery pack of the ninth aspect, the side surface covering portion includes a second side surface covering portion that covers the second side surface, a third side surface covering portion that covers the third side surface, And a fourth side surface covering portion that covers the fourth side surface.

  Furthermore, according to the battery pack which concerns on a 10th side surface, the double plate tape for sticking the said upper plate or lower plate to a main body case can be further provided.

  Furthermore, according to the battery pack of the eleventh aspect, the secondary battery cell can be a lithium polymer battery.

It is a perspective view which shows the battery pack which concerns on Embodiment 1 of this invention. It is the perspective view which looked at the battery pack of FIG. 1 from diagonally downward. It is a perspective view which shows a mode that a battery drive apparatus is charged with the battery pack of FIG. It is a perspective view which shows a mode that the battery pack of FIG. 1 is charged with an external power supply. It is a disassembled perspective view which shows the state which removed the upper plate from FIG. It is the disassembled perspective view which looked at FIG. 5 from the back surface. It is a disassembled perspective view which shows the state which removed the upper plate from the battery pack of FIG. It is a disassembled perspective view which shows the state which removed the lower plate from the battery pack of FIG. It is the disassembled perspective view which looked at the battery pack of FIG. 8 from diagonally downward. It is a perspective view which shows the inside of a main body case. It is an exploded top view which shows the state which removed the connector part from the circuit board. FIG. 2 is a vertical sectional view taken along line XII-XII of the battery pack of FIG. 1. It is a top view which shows the inside of a battery pack. It is a vertical sectional view in the XIV-XIV line of the battery pack of FIG. It is a disassembled perspective view which shows the state which removed the upper plate from the battery pack of FIG. It is a schematic cross section which shows the state which bent the battery pack of FIG. It is a perspective view which shows a mode that the rib for board | substrates was provided in the main body case. It is a disassembled perspective view which shows the state which removed the lower plate from the battery pack of FIG. It is an expansion perspective view which shows the part of the nail | claw of FIG. It is a disassembled perspective view of the conventional battery pack.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiment described below exemplifies a battery pack for embodying the technical idea of the present invention, and the present invention does not specify the battery pack as follows. Further, in the present specification, in order to facilitate understanding of the scope of claims, numbers corresponding to the members shown in the examples are indicated in the “claims” and “means for solving problems” sections. It is appended to the members shown. However, the members shown in the claims are not limited to the members in the embodiments. In particular, the dimensions, materials, shapes, relative arrangements, and the like of the constituent members described in the embodiments are not intended to limit the scope of the present invention only to the description unless otherwise specified. It's just an example. Note that the size, positional relationship, and the like of the members shown in each drawing may be exaggerated for clarity of explanation. Furthermore, in the following description, the same name and symbol indicate the same or the same members, and detailed description thereof will be omitted as appropriate. Furthermore, each element constituting the present invention may be configured such that a plurality of elements are configured by the same member and the plurality of elements are shared by one member. It can also be realized by sharing. In addition, the contents described in some examples and embodiments may be used in other examples and embodiments.
Example 1

Hereinafter, as Example 1, a battery pack capable of supplying power to a battery-driven device will be described with reference to FIGS. In these drawings, FIG. 1 is a perspective view showing a battery pack 100 according to Embodiment 1 of the present invention, FIG. 2 is a perspective view of the battery pack 100 of FIG. 1 as viewed obliquely from below, and FIG. 3 is a battery of FIG. FIG. 4 is a perspective view showing how the battery drive device BD is charged with the pack 100, and FIG. 4 is a perspective view showing how the battery pack 100 shown in FIG. 1 is charged with an external power source. The battery pack 100 has a plate-like outer shape as shown in FIGS. 1 and 2, and includes a plurality of secondary battery cells 1 therein. Then, as shown in FIG. 3, the battery drive device BD to be charged is connected via a USB cable or the like, and the secondary battery cell 1 is discharged to charge the battery drive device BD. Further, as shown in FIG. 4, the built-in secondary battery cell 1 is charged by connecting to an external power source such as an AC adapter via a USB cable or the like.
(Battery drive equipment BD)

The battery-driven device BD has a built-in device-side secondary battery and is driven by the device-side secondary battery. As such a battery-driven device BD, for example, a slate PC, a smartphone, a mobile phone, or the like can be used. In this example, a slate PC is used. The battery-driven device BD having a plate-like outer shape such as a slate PC is easily carried by using the same plate-like battery pack 100. The battery pack 100 charges a device-side secondary battery built in such a battery-driven device BD. For this reason, the battery pack 100 includes a connector portion for electrically connecting to the battery drive device BD.
(Battery pack 100)

5 to 9 are exploded perspective views of the battery pack 100. FIG. 5 is an exploded perspective view showing a state in which the upper plate 21 is removed from FIG. 1, FIG. 6 is an exploded perspective view of FIG. 5 viewed from the back, and FIG. 7 is an upper plate from the battery pack 100 of FIG. FIG. 8 is an exploded perspective view showing a state where the lower plate 22 is further removed from the battery pack 100 of FIG. 7, and FIG. 9 is a perspective view of the battery pack 100 of FIG. An exploded perspective view is shown respectively. As shown in these drawings, the battery pack 100 includes a main body case 10, an upper plate 21, and a lower plate 22.
(Main body case 10)

  The main body case 10 is formed in a plate shape whose width is larger than its thickness. The plate-shaped main body case 10 has a rectangular upper surface in plan view, a lower surface opposite to the upper surface, a first side surface located between the upper surface and the lower surface, a second side surface intersecting the first side surface, It has a third side surface opposite to the one side surface and a fourth side surface intersecting with the third side surface. Here, it arrange | positions so that a 1st side surface and a 3rd side surface may be parallel, and a 2nd side surface and a 4th side surface may become parallel. Further, the adjacent first side surface and second side surface, second side surface and third side surface, and third side surface and fourth side surface are substantially orthogonal to each other. Furthermore, the first side surface is longer than the second side surface. In other words, the distance between the second side surface and the fourth side surface is longer than the distance between the first side surface and the third side surface.

As shown in FIGS. 8 to 9, the main body case 10 is divided into an upper case 11 and a lower case 12 and is fixed by screws or the like. The main body case 10 is made of an insulating material. For example, it is made of resin such as polycarbonate. In the main body case 10, the secondary battery cell 1 and the circuit board 30 are accommodated.
(Secondary battery cell 1)

  The secondary battery cell 1 is a lithium polymer battery. The secondary battery cell 1 also has a plate-like outer shape whose width is larger than its thickness. Such plate-shaped, that is, thin secondary battery cells 1 can be thinned by arranging them side by side on the same plane. In other words, the thickness of the battery pack 100 can be reduced by reducing the thickness of the secondary battery cell 1.

  Here, three lithium polymer batteries are arranged in the main body case 10 side by side. Three lithium polymer batteries are connected in series, and charging / discharging is controlled by a power supply control circuit mounted on the circuit board 30. Thereby, the battery pack 100 can supply the power required by the battery drive device BD50.

In this example, an example in which three secondary battery cells 1 are used is described. However, the present invention does not limit the number of secondary battery cells, and may be two or less, or four or more. Here, the size of the secondary battery cell to be used is set to a specified size, and the number of secondary battery cells to be used is adjusted to correspond to the body case of various sizes and the required capacity. With this method, there is an advantage that it can flexibly cope with different required specifications. However, one secondary battery cell can be individually designed with a size and specification corresponding to the main body case.
(Circuit board 30)

The circuit board 30 is electrically connected to the secondary battery cell 1 and is mounted with a power supply control circuit for controlling charge / discharge of the secondary battery cell 1. Furthermore, the connector part 14 for taking out the output of the secondary battery cell 1 controlled by the electric power feeding control circuit outside is also mounted. The connector part 14 is arrange | positioned so that it may expose from the 1st side surface of the main body case 10. FIG.
(Upper plate 21)

The upper plate 21 covers the upper surface of the main body case 10. The upper plate 21 is made of metal. The metal upper plate 21 is preferably made of aluminum that is lightweight and excellent in thermal conductivity. Moreover, the appearance can be made beautiful by applying aluminum alumite treatment to the surface.
(Lower plate 22)

On the other hand, the lower plate 22 covers the lower surface of the main body case 10. The lower plate 22 is also made of the same material as the upper case 11.
(Side cover)

  The upper plate 21 has a flat plate-like first flat surface portion 21a. The first flat surface portion 21 a is formed to have substantially the same size as the front surface of the main body case 10 so as to cover the upper surface of the main body case 10. Further, a side surface covering portion that covers the second side surface, the third side surface, and the fourth side surface of the main body case 10 is extended from the periphery of the first flat surface portion 21a. In other words, the side surface except the first side surface of the main body case 10 is covered with the side surface covering portion. Further, the side surface covering portion includes an edge covering portion 21 e that covers four rectangular corners of the main body case 10. And in the 1st side surface of the main body case 10, while covering the right and left with the edge covering part 21e, the side surface covering part is opened between the edge covering parts 21e. And the connector part 14 is arrange | positioned in this opening part.

Moreover, it is preferable to provide not only the connector part 14 but all required members, such as the operation part 16, the display part 17, and the electric power feeding connector 15, in the 1st surface. By doing in this way, it becomes possible to coat | cover all the 2nd side surfaces, 3rd side surfaces, and 4th side surfaces with the upper plate 21, and coat | cover three surfaces among the surrounding 4 surfaces of the main body case 10 with a metal plate material. Can improve the mechanical strength.
(Connector part 14)

  As shown in FIG. 1 etc., the connector part 14, the operation part 16, and the display part 17 are provided in the 1st side surface. The connector part 14 is a terminal for taking out the output of the secondary battery cell 1 outside. The connector unit 14 is preferably a standardized terminal from the viewpoint of versatility, and here, a USB (trademark) terminal (A type) is used.

Further, the circuit board 30 on which the connector part 14 is mounted has a notch along the outer shape of the connector part 14 as shown in the perspective view of FIG. 10 and FIG. Thus, by arranging the connector part 14 in the notch instead of the upper surface of the circuit board 30, the battery pack 100 has a thickness corresponding to the thickness of the circuit board 30 compared to the configuration in which the connector part 14 is mounted on the circuit board 30. The advantage that can be reduced in thickness is obtained.
(Operation unit 16)

The operation unit 16 has an operation button for starting the discharge of the battery pack 100. When the operation button is pressed, discharging of the secondary battery cell 1 is started, and power is supplied to the battery driving device BD connected to the connector unit 14.
(Display unit 17)

The display unit 17 is a member for indicating the charge / discharge state of the secondary battery cell 1. Here, whether the secondary battery cell 1 is in a charged state or a discharged state is displayed by a lighting pattern such as an LED or a light emission color. Further, the remaining capacity can be displayed by the number of lighting of the plurality of LEDs.
(Power supply connector 15)

  Further, a power supply connector 15 for receiving power for charging the secondary battery cell 1 from an external power source is also provided on the first side surface. The power supply connector 15 is also preferably a standardized terminal from the viewpoint of convenience, and here is a micro USB (trademark) terminal.

In this way, by arranging all necessary members together on the first side surface, the other surface can be covered with the metal upper plate 21, the main body case 10 is reinforced, and the internal secondary battery cell 1 Protection can be increased. The three secondary battery cells 1 are arranged so as to face the third side surface in the main body case 10 as shown in FIGS. 8, 12, and 13. In other words, it is separated from the first side surface, and the circuit board 30 is disposed between the first side surface and the secondary battery cell 1. By arranging in this way, the secondary battery is composed of the first flat surface portion 21a, the second side surface covering portion 21b, the third side surface covering portion 21c, the fourth side surface covering portion 21d, and the lower plate 22 of the metal upper plate 21. The cell 1 can be surrounded and strongly protected.
(Plate rib 21f)

Furthermore, the side surface covering portion is provided with a plate rib 21 f for fixing the upper plate 21 to the main body case 10. The plate rib 21f protrudes toward the main body case 10 at the end edges of the second side surface covering portion 21b and the fourth side surface covering portion 21d. In this case, as shown in FIG. 6, the edges of the second side surface covering portion 21b and the fourth side surface covering portion 21d are bent so that the plate ribs 21f face each other. One side is sandwiched from both sides.
(Locking groove 13)

  On the other hand, as shown in FIGS. 5 and 6, the main body case 10 is formed with a locking groove 13 for locking the plate rib 21f at a position corresponding to the plate rib 21f on the second side surface and the fourth side surface. ing. As shown in the sectional view of FIG. 14 and the exploded view of FIG. 15, the upper plate 21 can be reliably fixed to the main body case 10 by locking the plate rib 21 f in the locking groove 13. In particular, as shown in FIG. 16, even if the battery pack 100 receives an external force so as to bend in the longitudinal direction, the plate rib 21f is locked at the second side surface covering portion 21b and the fourth side surface covering portion 21d facing each other. Since it acts so as to bite further into the groove 13, the upper plate 21 can hardly be detached from the main body case 10, thereby protecting the built-in secondary battery cell 1 and improving the reliability. Conversely, when stress is applied from above the battery pack 100, even if the main body case 10 is to be deformed in the opening direction, the effect of preventing such deformation is obtained by the plate rib 21g described later. In addition, by providing the locking groove 13 only at a position corresponding to the plate rib 21f, the upper plate 21 is physically prevented from being fixed in the reverse direction with respect to the main body case 10, and the mounting direction at the time of assembly. The effect of avoiding this mistake can also be obtained.

  It is not always necessary to provide the plate rib 21f on the entire end edge of the second side surface covering portion 21b and the fourth side surface covering portion 21d. In the example of FIG. 6, the plate rib 21 f is extended to a length exceeding about ½ from the edge covering portion 21 e on the first side surface side of the second side surface covering portion 21 b and the fourth side surface covering portion 21 d. In this way, the plate rib 21f has a length of ½ or more of the edge of the second side surface covering portion 21b and the fourth side surface covering portion 21d. In this way, the upper case 11 can be sufficiently fixed to the main body case 10 by locking the plate rib 21f with the locking groove 13 for more than half.

  Moreover, when not providing the plate rib 21f in the whole surface of the 2nd side surface covering part 21b and the 4th side surface covering part 21d, it is preferable to provide it eccentrically on the 1st side surface side. Accordingly, the first side surface of the second side surface and the fourth side surface are fixed by the plate rib 21f while the first side surface is not covered with the side surface covering portion, thereby suppressing the deformation on the first side surface. The effect can be enhanced and the secondary battery cell 1 can be protected.

Furthermore, as shown in FIG. 6 etc., the plate rib 21g can be provided also in the 3rd side surface covering part 21c. A locking groove 13 is also formed on the main body case 10 side accordingly. Accordingly, guides can be provided not only on both sides of the upper plate 21 but also in the longitudinal direction, and the rigidity against deflection can be further increased.
(Rib 18 for battery)

Further, in the main body case 10, battery ribs 18 that define a battery arrangement space for arranging the secondary battery cells 1 are provided. The battery rib 18 is made of a material having insulating properties and heat insulating properties, and is preferably integrally formed with the main body case 10. By thus providing and partitioning the battery ribs 18 between the adjacent secondary battery cells 1, it is possible to improve insulation and heat insulation and improve safety. For example, even if one secondary battery cell 1 reaches a high temperature, the influence on other secondary battery cells 1 is suppressed.
(Rib 19 for substrate)

As shown in FIG. 17, the main body case 10 further includes a board rib 19 that contacts the circuit board 30 that faces the first side surface. The board ribs 19 are provided on the upper case 11 and the lower case 12 so as to contact the upper and lower surfaces of the circuit board 30. That is, it is preferable that the board ribs 19 of the upper case 11 and the board ribs 19 of the lower case 12 are formed in a complementary pattern so as to contact each other via the circuit board 30. Thereby, the 1st side surface in which the metal side surface coating | coated part is not provided can be reinforced with the rib 19 for board | substrates, This prevents the deformation | transformation of the main body case 10, and can protect the secondary battery cell 1 from external force. The pattern of the board ribs 19 is not limited to this, and can be formed in any pattern that can support the circuit board 30 and reinforce the first side surface.
(Cover protrusion 23)

  On the other hand, as shown in the exploded perspective view of FIG. 18, the lower plate 22 is provided with cover protrusions 23 at a plurality of locations on the edge. The cover protrusion 23 is formed in a claw shape, and the lower plate 22 can be fixed to the main body case 10 by being inserted into a slit 24 provided in the main body case 10.

The cover protrusion 23 is provided by bending a protruding piece formed to protrude from the edge of the lower plate 22. Here, the tip is formed in a bifurcated shape. Further, in the lower case 12, one is provided in the center on the side facing the first side surface, and two locations are provided on the side facing the third side surface. Moreover, after inserting in the slit 24, the lower plate 22 can be fixed with the main body case 10, preferably by bending the cover protrusion 23 protruding into the case main body.
(Slit 24)

  As shown in FIG. 18, the main body case 10 is provided with the slits 24 at positions corresponding to the cover protrusions 23 as described above. Further, a box-shaped rib 25 is formed inside the main body case 10 as shown in FIG. The box-shaped rib 25 is formed so as to surround the periphery of the slit 24. The box-shaped rib 25 is made of an insulating member, and is preferably formed integrally with the lower case 12.

By surrounding the cover protrusions 23 with the insulating box-shaped ribs 25 in this way, it is possible to avoid a situation in which the metal cover protrusions 23 are close to the circuit board 30 and cause discharge. That is, surrounding with the insulating box-shaped rib 25 increases the distance from the circuit board 30, and the circuit board 30 can be protected by suppressing creeping discharge. In addition, the box-shaped rib can reinforce the connection portion between the lower plate 22 and the main body case 10 for improving the mechanical strength, and can increase the mechanical resistance against stresses such as torsion.
(Double-sided tape 42)

  Furthermore, the upper plate 21 and the lower plate 22 are fixed to the upper case 11 and the lower case 12 of the main body case 10 with double-sided tape 42, respectively. Thereby, these metal reinforcement plates can be more securely fixed to the main body case 10, and the rigidity when an external force such as twisting is applied to the main body case 10 can be increased. In this example, the double-sided tape 42 is divided and applied to four sheets, but it goes without saying that a single large double-sided tape may be applied in order to simplify the application process. .

  With such a configuration, the main body case 10 is covered with the metal upper plate 21 and the lower plate 22 and the side surface covering portion is further provided in the thickness direction, while the appearance of the battery pack 100 is made thin. The rigidity with respect to 10 bending can be increased, and mechanical strength can be improved. On the other hand, the first side surface is opened and the connector portion 14 is provided so that the electrical connection with the external device is not hindered, while the first side surface having the side surface covering portion opened is separated from the secondary battery. In addition, by arranging the secondary battery on the third side face reinforced by the side face covering portion, even if an external force is applied to the main body case 10, the secondary battery can be protected by the side face covering portion.

  The battery pack according to the present invention is a battery pack or booster provided with an output connector that can be charged by connecting to a battery-driven device such as a slate PC capable of USB charging, a smartphone, a mobile phone, a portable music player, and a portable recording device, It can be suitably used.

DESCRIPTION OF SYMBOLS 100 ... Battery pack 1 ... Secondary battery cell 10 ... Main body case 11 ... Upper case 12 ... Lower case 13 ... Locking groove 14 ... Connector part 15 ... Power feeding connector 16 ... Operation part 17 ... Display part 18 ... Battery rib 19 ... 21a ... 3rd side surface covering part; 21d ... 4th side surface covering part; 21e ... edge covering part; 21f, 21g ... 21b ... 2nd side surface covering part; 21c ... 3rd side surface covering part; Plate rib 22 ... Lower plate 23 ... Cover protrusion 24 ... Slit 25 ... Box-shaped rib 30 ... Circuit board 42 ... Double-sided tape 901 ... Cylindrical battery 902 ... Outer case 903 ... Insulating holder 904 ... Substrate circuit 909 ... Battery assembly BD ... Battery Drive equipment

Claims (11)

A battery pack that can be connected to a battery-driven device and can supply power to a device-side secondary battery built in the battery-driven device,
An insulating plate-shaped upper surface having a width larger than the thickness, a lower surface opposite to the upper surface, a first side located between the upper surface and the lower surface, and a second intersecting the first side A body case having a side surface, a third side surface opposite to the first side surface, and a fourth side surface intersecting with the third side surface;
One or more rechargeable secondary battery cells built into the main body case and rechargeable;
A metal upper plate covering the upper surface of the main body case;
A lower metal plate covering the lower surface of the main body case;
A circuit board electrically connected to the secondary battery cell;
A connector part mounted on the circuit board, electrically connected to the secondary battery cell, and for outputting power discharged from the secondary battery cell to the outside,
With
The secondary battery cell is disposed so as to face the third side surface in the main body case, while being separated from the first side surface,
The circuit board is disposed between the secondary battery cell and the first side surface in the main body case,
The upper plate is continuously provided from the first flat surface portion that covers the upper surface of the main body case, and is integrally provided with a side surface covering portion that covers the second side surface, the third side surface, and the fourth side surface,
The side surface covering portion includes an edge covering portion that covers the four rectangular corners of the main body case,
In a first aspect of the main body case, the left and right as well as coated with the edge covering portion, and opens the side surface covering portions between said end edge covering portion, becoming by positioning the connector portions to the open port portion A battery pack characterized by The battery pack according to claim 1,
A battery pack comprising an operation unit for operating discharge of the secondary battery cell and a display unit indicating a charge / discharge state on the first side surface of the main body case. The battery pack according to claim 1 or 2,
The battery pack according to claim 1, wherein the main body case is provided with a board rib that contacts the circuit board disposed facing the first side surface. The battery pack according to any one of claims 1 to 3,
A plurality of the secondary battery cells are arranged adjacent to each other in the main body case,
The battery pack is characterized in that the main body case is provided with battery ribs having insulation properties and heat insulation properties interposed between the secondary battery cells. The battery pack according to any one of claims 1 to 4,
The distance between the second side surface and the fourth side surface of the main body case facing each other is longer than the distance between the first side surface and the third side surface,
The upper plate, at the edge of the side surface covering portion that covers the side surface covering portion and the fourth side surface covering the second side, and provided with a plate rib locking projecting to the main body case side,
The battery pack according to claim 1, wherein the body case is formed with a locking groove for locking the plate rib. The battery pack according to any one of claims 1 to 5,
Bent cover protrusions are provided at a plurality of positions on the edge of the lower plate, respectively.
The main body case has a plurality of slits for inserting the cover protrusions,
A battery pack, wherein the cover protrusion is bent and the lower plate is fixed to a main body case with the cover protrusion inserted into the slit. The battery pack according to claim 6,
The main body case is provided with a box-shaped rib around the slit. The battery pack according to any one of claims 1 to 7,
The circuit board forms a notch along the outer shape of the connector part,
The battery pack, wherein the connector portion is disposed in a cutout of the circuit board. The battery pack according to any one of claims 1 to 8,
The side surface covering portion includes a second side surface covering portion that covers the second side surface, a third side surface covering portion that covers the third side surface, and a fourth side surface covering portion that covers the fourth side surface. A battery pack characterized by that. The battery pack according to any one of claims 1 to 9, further comprising:
A battery pack comprising a double-sided tape for attaching the upper plate or the lower plate to a main body case. The battery pack according to any one of claims 1 to 10,
The battery pack, wherein the secondary battery cell is a lithium polymer battery.

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