JP6593513B2 - Battery pack - Google Patents

Description

  The present technology relates to a battery pack that can be attached to an electronic device.

  A battery pack such as a lithium ion secondary battery is detachably attached to a small electronic device such as a digital still camera, a digital video camera, or a mobile phone. Some battery packs include a control terminal for communication and a temperature detection terminal for temperature detection in addition to a plus terminal and a minus terminal. For example, Patent Document 1 below describes a battery pack having a terminal portion in which a control terminal, a minus terminal, a temperature detection terminal, and a plus terminal are arranged in order in the width direction on the front surface of the battery pack.

  The battery pack is typically configured to be able to be charged by an electronic device such as a charger. In this case, in order to maintain an appropriate connection state between the battery pack terminal and the contact of the charger, the battery pack needs to be stably held by the charger. Typically, in the battery pack, a terminal surface on which terminals are arranged and an end surface opposite to the terminal surface are locked to a battery mounting portion of the charger.

JP 2009-176486 A

  With recent miniaturization of electronic devices, battery packs used in the electronic devices are also being miniaturized. On the other hand, with the downsizing of electronic devices and battery packs, the arrangement intervals of contacts provided in the battery mounting portion of the electronic devices are also reduced. Therefore, if the battery pack is not inserted correctly or the contact shape is defective, the battery pack and the electronic device cannot be properly attached, and the electronic device may not operate normally. There is.

  In view of the circumstances as described above, an object of the present technology is to provide a battery pack that can ensure an appropriate mounting state with an electronic device.

In order to achieve the above object, a battery pack according to an embodiment of the present technology includes a first main surface, a second main surface, a first end surface, and a first recess.
The second main surface is opposed to the first main surface in the first axial direction.
The first end surface is a plurality of terminals between the first main surface and the second main surface and exposing the terminal to the outside in a second axial direction orthogonal to the first axial direction. The plurality of terminal windows are arranged so as to be biased toward the first main surface rather than the second main surface.
The first concave portion is arranged on the first end surface so as to be biased toward the second main surface side rather than the first main surface side, and is opened to one side in the second axial direction.
A part of the outer periphery of the first end surface is formed by a curved part, and at least a part of the opened part of the first recess is formed by the curved part.

The battery pack is disposed on the first end surface so as to be biased toward the second main surface side rather than the first main surface side, and is opened to one side in the second axial direction. May further be provided.
The first concave portion has a first width dimension in a third axial direction orthogonal to the first axial direction and the second axial direction, and the second concave portion is defined by the third axial direction. You may have a 2nd width dimension smaller than the said 1st width dimension in a direction.
The first recess may be further opened in one of the first axial directions.
The curved portion may be formed by a part of a circle.

  The battery pack further includes a first side surface and a second side surface facing the first side surface in the third axial direction, and the plurality of terminal windows are formed from the second side surface side. May also be arranged biased toward the first side surface.

  The first concave portion is arranged to be biased toward the first side surface side than the second side surface side, and the second concave portion is biased toward the second side surface side from the first side surface side. May be arranged.

  The plurality of terminal windows may be arranged so as to be biased toward the first concave portion side rather than the second concave portion side.

The plurality of terminal windows include at least a first terminal window that exposes the plus terminal to the outside, a second terminal window that exposes the minus terminal to the outside, and a third terminal window that exposes the temperature detection terminal to the outside. And may be included.
The plurality of terminal windows may be arranged in the order of the first terminal window, the third terminal window, and the second terminal window.
The first terminal window may be arranged so as to be biased toward the first side surface rather than the first side surface.

  As described above, according to the present technology, it is possible to ensure an appropriate mounting state with the electronic device.

1 is a perspective view of a battery pack according to an embodiment of the present technology. It is a top view of the said battery pack. It is a front view of the said battery pack. It is a right view of the said battery pack. It is a left view of the said battery pack. It is a disassembled perspective view of the said battery pack. It is a top view which shows the detail of a structure of the terminal surface of the said battery pack. It is a front view which shows roughly the electronic device with which the said battery pack was mounted | worn. It is principal part sectional drawing of the electronic device with which the said battery pack was mounted | worn. It is a perspective view which shows the inner surface structure of the top cover which forms the terminal surface of the said battery pack. It is a bottom view which shows the inner surface structure of the said top cover. It is a top view of the top cover It is a top view of the bottom cover which forms the rear surface of the said battery pack. It is principal part sectional drawing of the electronic device with which the said battery pack was mounted | worn. It is principal part sectional drawing of the other electronic device with which the said battery pack was mounted | worn. It is a top view explaining the detail of the terminal window formed in the said top cover.

  Hereinafter, embodiments according to the present technology will be described with reference to the drawings.

  1 to 5 show the appearance of a battery pack according to an embodiment of the present technology. FIG. 1 is a perspective view, FIG. 2 is a plan view, FIG. 3 is a front view, and FIG. 4 is a right side view. 5 is a left side view. In each figure, X, Y, and Z indicate three axial directions orthogonal to each other.

  The battery pack 100 according to the present embodiment includes a pack body 10 and a terminal portion 20.

[Pack body]
The pack body includes an upper surface 11 (first main surface), a lower surface 12 (second main surface), a front surface 13 (first end surface), a rear surface 14 (second end surface), and a right side surface 15 ( A first side surface) and a left side surface 16 (second side surface). The upper surface 11 and the lower surface 12 oppose each other in the X-axis direction (first axial direction). The front surface 13 and the rear surface 14 oppose each other in the Y-axis direction (second axial direction). The right side surface 15 and the left side surface 16 oppose each other in the Z-axis direction (third axial direction). In the figure, the X-axis direction corresponds to the thickness direction of the battery pack, the Y-axis direction corresponds to its length direction, and the Z-axis direction corresponds to its width direction.

  The whole pack body 10 is formed in a substantially rectangular and flat shape. The upper surface 11 and the lower surface 12 are each formed in a substantially flat surface. Although the front surface 13 and the rear surface 14 have a step, each surface formed by the step is formed as a substantially flat surface. The right side surface 15 and the left side surface 16 are formed as circular arc surfaces that bulge outward. As shown in FIG. 2, the pack body 10 is substantially line symmetric with respect to the center line P <b> 1 in the width direction parallel to the X-axis direction and viewed in the thickness direction parallel to the Z-axis direction. It is formed substantially symmetrical with respect to the center line P2.

  FIG. 6 is an exploded perspective view of the main part of the battery pack 100. The pack body 10 includes a cell unit 30, a top cover 31 fixed to the front end portion of the cell unit 30, and a bottom cover 32 fixed to the rear end portion of the cell unit 30. The top cover 31 forms the front surface 13 of the pack body 10, and the bottom cover 32 forms the rear surface 14 of the pack body 10.

  The cell unit 30 includes a can body that is generally rectangular and has a flat cylindrical shape, and battery cells that are built in the can body. The battery cell is composed of a non-aqueous electrolyte secondary battery such as a lithium ion secondary battery. The can body is formed of, for example, a metal material such as aluminum, and the surface is electrically insulated and protected by a resin layer such as nylon provided on the surface thereof. Further, the inner surface of the can body is provided with a resin layer having excellent insulating properties and bendability such as polypropylene, and the can body is configured to be heat weldable to the top cover 31 and the bottom cover 32 through the resin layer. ing.

  The top cover 31 and the bottom cover 32 are formed of an injection molded body of a synthetic resin material such as polypropylene, for example. The top cover 31 is attached so as to cover the front end portion of the cell unit 30, and the bottom cover 32 is attached so as to cover the rear end portion of the cell unit 30. The outer shape of the top cover 31 and the bottom cover 32 corresponds to the outer shape of the front end portion and the rear end portion of the cell unit 30. Therefore, the planar shape of the top cover 31 and the bottom cover 32 is formed in a substantially oval shape. Yes.

  A label 17 is attached to the pack body 10 across the upper surface 11, the rear surface 14, and the lower surface 12. The label 17 is made of a resin sheet such as polyethylene terephthalate. The surface of the label 17 forms a printing surface on which the insertion direction, manufacturer name, model, terminal symbol, etc. are displayed, and the back surface of the label 17 forms an adhesive surface on which an adhesive layer is formed.

[Terminal part]
The terminal part 20 is accommodated between the cell unit 30 and the top cover 31. The terminal unit 20 includes a wiring board 21, a positive electrode tab 22 and a negative electrode tab 23, a holder 24, and a PTC (Positive Temperature Coefficient) thermistor 25, which are arranged in order from the top cover 31 side.

  The holder 24 supports the positive electrode tab 22 and the negative electrode tab 23, respectively. The positive electrode tab 22 and the negative electrode tab 23 are respectively connected to a plus lead terminal and a minus lead terminal led out from the inside of the cell unit 30. The PTC 25 is disposed between the negative electrode tab 23 and the negative lead terminal, and when the temperature of the cell unit 30 becomes higher than the set temperature, the electric resistance suddenly increases and the current flowing through the cell unit 30 is substantially increased. Has the function of blocking.

  A double-sided board is used for the wiring board 21, and a plus terminal 21a, a minus terminal 21b, a temperature detection terminal 21c, and a control terminal 21d are disposed on the surface on the top cover 31 side. The plus terminal 21 a and the minus terminal 21 b are electrically connected to the positive electrode tab 22 and the negative electrode tab 23 facing the back surface of the wiring board 21, respectively. The terminals 21a to 21d are formed of a conductor pattern in which a gold plating layer is laminated on the surface of a copper foil, for example.

  Further, a thermistor as a temperature detection element, a protection circuit for monitoring the voltage between terminals, a determination circuit for determining the type of the battery, and the like are arranged on the surface of the wiring board 21. The thermistor is connected to a temperature detection terminal 21c, and the discrimination circuit is connected to, for example, a control terminal 21d. Note that the determination circuit may not be mounted according to the specification.

  The terminals 21 a to 21 d of the terminal portion 20 are exposed to the outside from the front surface 13 of the pack body 10, that is, the surface of the top cover 31. Therefore, the front surface 13 of the pack body 10 (the surface of the top cover 31) forms the terminal surface 101 of the battery pack 100.

  Details of the battery pack 100 of the present embodiment will be described below.

(Terminal sequence)
In the battery pack 100 of the present embodiment, the terminal portion 20 includes a positive terminal 21a, a negative terminal 21b, a temperature detection terminal 21c, and a temperature detection terminal 21c arranged on the terminal surface 101 (the front surface 13 of the pack body 10) along the Z-axis direction. A control terminal 21d is included. The minus terminal 21b is disposed between the temperature detection terminal 21c and the control terminal 21d so as to be biased toward the control terminal 21d rather than the temperature detection terminal 21c.

  FIG. 7 is an enlarged view of FIG. 2 showing the terminal surface 101. The terminals of the terminal portion 20 are linearly arranged along the Z-axis direction in the order of the control terminal 21d, the minus terminal 21b, the temperature detection terminal 21c, and the plus terminal 21a from the left side in the drawing. The minus terminal 21b disposed between the control terminal 21d and the temperature detection terminal 21c is disposed so as to be biased toward the control terminal 21d rather than the temperature detection terminal 21c as illustrated.

  In FIG. 7, for the sake of convenience, “C” is attached to the control terminal 21d, “−” to the minus terminal 21b, “T” to the temperature detection terminal 21c, and “+” to the plus terminal 21a. Actually, these symbols may not be attached to each terminal.

  FIG. 8 is a front view schematically showing the electronic device 200 to which the battery pack 100 is attached. As the electronic device 200, a digital still camera is applied, but other than this, for example, a small electronic device such as a digital video camera, a mobile phone, and a portable game machine can be applied. The electronic device 200 also includes a charger for charging the battery pack 100.

  The device main body 201 of the electronic device 200 is provided with a lens barrel portion 202 and a battery mounting portion 203. The battery mounting portion 203 is provided inside the device main body 201 and has an opening on the bottom surface of the device main body 201 and a lid that can close the opening, although not shown. The battery pack 100 is attached to the battery attachment portion 203 by being inserted into the opening from the terminal surface 101 side. Inside the battery mounting portion 203, a positive terminal contact 3a, a negative terminal contact 3b, a temperature detection terminal contact 3c, and a control terminal contact 3d that can be connected to the terminals 21a to 21d of the battery pack 100 are arranged. Yes. These contacts 3a to 3d are arranged so as to correspond to the arrangement order and arrangement intervals of the terminals 21a to 21d of the battery pack 100, respectively. The control terminal contact 3d may be omitted depending on the specifications of the electronic device 200.

  With recent miniaturization of electronic devices, battery packs used in the electronic devices are also being miniaturized. On the other hand, with the downsizing of electronic devices and battery packs, the arrangement intervals of contacts provided in the battery mounting portion of the electronic devices are also reduced. Therefore, if the battery pack is not inserted correctly or the contact shape is defective, the battery pack and the electronic device cannot be properly attached, and the electronic device may not operate normally. There is.

  For example, if the control terminal, negative terminal, temperature detection terminal, and positive terminal are arranged in that order on the terminal surface of the battery pack, the battery pack may not be inserted correctly, or the shape of the contact point of the electronic device may be defective. If so, the negative terminal contact on the electronic device side may come into contact with the temperature terminal or control terminal of the battery pack. Further, comparing the failure when the negative terminal contact with the temperature detection terminal is compared with the failure when the contact with the control terminal, the former is more influential from the viewpoint of ensuring the normal operation of the electronic device.

  Therefore, in the battery pack 100 of the present embodiment, the minus terminal 21b arranged between the temperature detection terminal 21c and the control terminal 21d is arranged so as to be biased toward the control terminal 21d side rather than the temperature detection terminal 21c side. Thereby, the negative terminal contact 3b of the electronic device can be prevented from being erroneously connected to the temperature detection terminal 21c, and the state where the contact 3b is properly connected to the negative terminal 21b can be stably secured. Thereby, normal operation of the electronic device 200 can be ensured.

  The top cover 31 forming the terminal surface 101 has a plurality of terminal windows 42 (42a, 42b, 42c, 42d) (FIGS. 6 and 7). The terminal window 42a exposes the plus terminal 21a to the outside. The terminal window 42d exposes the control terminal 21d to the outside. The terminal window 42b is provided with a first gap (G1) from the terminal window 42d, and exposes the negative terminal 21b to the outside. The terminal window 42c is provided with a second gap (G2) larger than the terminal window 42b and the first gap (G1), and exposes the temperature detection terminal 21c to the outside. Thereby, the predetermined terminal space | interval of terminal 21a-21c can be ensured, and the appropriate mounting state of the battery pack 100 with respect to the battery mounting part 203 can be ensured more stably.

  In the present embodiment, the longitudinal dimensions along the X-axis direction of the terminals 21a to 21d exposed from the terminal surface 101 are all 3 mm. Regarding the lateral dimension along the Z-axis direction, the plus terminal 21a is 4.25 mm, the minus terminal 21b is 3.85 mm, and the temperature detection terminal 21c and the control terminal 21d are 2.7 mm, respectively. The gap (G1) between the minus terminal 21b and the control terminal 21d is 1.2 mm, and the gap (G2) between the minus terminal 21b and the temperature detection terminal 21c is 1.65 mm.

  In the present embodiment, the temperature detection terminal 21c is disposed between the minus terminal 21b and the plus terminal 21a. Thereby, since the separation distance between the plus terminal 21a and the minus terminal 21b can be increased, the electrical insulation between both terminals can be enhanced.

  Further, since the plus terminal 21a can be arranged on the outermost side by the above arrangement, the degree of freedom of the shape and size of the plus terminal 21a is increased. In the present embodiment, the plus terminal 21a is formed with a larger area than the minus terminal 21b. Thereby, the freedom degree of arrangement | positioning of the contact 3a by the side of an electronic device increases, and the appropriate mounting state of the battery pack 100 can be ensured.

(Concave)
The terminal surface 101 of the battery pack 100 has a first recess 43 and a second recess 44. The first and second recesses 43 and 44 are provided at substantially symmetrical positions with respect to the center line P1 (FIG. 2) on the terminal surface 101, for example, at two end portions facing the Z-axis direction of the terminal surface 101, respectively. .

  In the present embodiment, the first recess 43 is provided on the right side 15 side of the pack body 10, and the second recess 44 is provided on the left side 16 side of the pack body 10. The first and second recesses 43 and 44 are arranged on the terminal surface 101 so as to be biased toward the lower surface 12 side rather than the upper surface 11 side of the pack body. In the present embodiment, the first and second recesses 43 and 44 are arranged so as to be biased toward the lower surface 12 side of the pack body 10 with respect to the center line P <b> 2 (FIG. 2) on the terminal surface 101.

  As shown in FIG. 7, the first and second recesses 43 and 44 have a width direction in the Z-axis direction, a depth direction in the Y-axis direction, and a depth direction in the X-axis direction. The first and second recesses 43 and 44 have a plane part 45a parallel to the YZ plane, a plane part 45b parallel to the XY plane, and a plane part 45c parallel to the XZ plane, and from the terminal surface 101 side. The cut-out shape when viewed is formed to be a substantially triangular shape (also referred to as a substantially fan shape) by the flat portion 45a, the flat portion 45b, and the side surface 15 (side surface 16).

  Two protrusions are formed on the bottom of the battery mounting portion 203 corresponding to the positions where the first and second recesses 43 and 44 are formed. FIG. 9 is a cross-sectional view of the main part of the electronic device showing the relationship between the battery mounting portion 203 and the battery pack 100 properly inserted into the battery mounting portion 203.

  The bottom 203a of the battery mounting portion 203 that faces the terminal surface 101 of the battery pack 100 corresponds to the contact points 3a to 3d that are disposed to face the terminals 21a to 21d on the terminal surface 101 and the positions where the recesses 43 and 44 are formed. Two protrusions 204 are provided. In FIG. 9, a positive terminal contact 3 a connected to the positive terminal 21 a of the battery pack 100 and a protrusion 204 on one side facing the first recess 43 are shown.

  When the battery pack 100 is inserted in an appropriate posture, each protrusion 204 enters the formation region of the first and second recesses 43 and 44, respectively, and the terminals 21a to 21d of the battery pack 100 and the battery Connection with the contacts 3a to 3d of the mounting portion 203 is allowed. In this state, the protrusion length, shape, size, and the like of the protrusion 204 may be set so that the protrusion 204 does not contact any surface on the terminal surface 101.

  On the other hand, when the battery pack 100 is inserted into the battery mounting portion 203 with its front and back reversed, each protrusion 204 is on the terminal surface 101 where the first and second recesses 43 and 44 are not formed. The region is contacted, and further insertion operation of the battery pack 100 from the contact position is restricted. Accordingly, it is possible to obtain a function of preventing the erroneous insertion of the battery pack 100 with respect to the electronic device 200, and it is possible to make the user recognize that the battery pack 100 is not inserted in the correct posture. Further, when the insertion of the battery pack 100 due to the contact between the protrusion 204 and the terminal surface 101 is restricted, the protrusion length of each protrusion 204 or the contacts 3a to 3d is set so that the terminals 21a to 21d do not contact the contacts 3a to 3d. Also good.

  In the present embodiment, as illustrated in FIG. 7, the terminals 21 a to 21 d of the terminal portion 20 are arranged on the terminal surface 101 so as to be biased toward the right side 15 rather than the left side 16. Thereby, the symmetry of the terminals 21a to 21d is broken with respect to the center line P1 of the terminal surface 101 parallel to the X-axis direction, and electrical connection between the terminal portion 20 and the electronic device 200 at the time of erroneous insertion can be inhibited.

  In this case, the first recess 43 has a larger width dimension in the Z-axis direction than the second recess 44. That is, as shown in FIG. 7, the width dimension W <b> 1 of the first recess 43 is set larger than the width dimension W <b> 2 of the second recess 44.

  Accordingly, when the battery pack 100 is inserted into the battery mounting portion 203 in an appropriate posture, the first concave portion 43 on the side where the terminals 21a to 21d are arranged to be offset and the protrusion 204 are prevented from interfering with each other, and the terminal portion Stable electrical connection between the 20 terminals 21a to 21d and the contacts 3a to 3d of the battery mounting portion 203 can be ensured. Further, by forming the region of the first recess 43 with a relatively large area, even if dust accumulates at the corners of the first recess 43 and the width of the bottom surface of the notch region becomes narrower than W1, Interference with the protrusion 204 can be suppressed. For this reason, the stable electrical connection between the terminal portion 20 and the battery mounting portion 203 is ensured.

  The widths W1 and W2 of the first and second recesses 43 and 44 are not particularly limited. In this embodiment, W1 = 3.85 mm and W2 = 3.5 mm. Moreover, the depth dimension along the Y-axis direction of the 1st and 2nd recessed parts 43 and 44 is set, for example to 1.8 mm.

  The terminals 21 a to 21 d of the terminal portion 20 are arranged on the terminal surface 101 so as to be biased toward the upper surface 11 side rather than the lower surface 12 side. In the present embodiment, the terminals 21a to 21d are arranged so as to be biased toward the upper surface 11 side of the pack body 10 with respect to the center line P2 (FIG. 2) on the terminal surface 101.

  Thereby, since the symmetry of the terminal part 20 is broken with respect to the center line P2, the electrical connection between the terminals 21a to 21d and the contacts 3a to 3d at the time of erroneous insertion into the battery mounting part 203 can be inhibited. In addition, it becomes easy to secure the formation region of the first and second recesses 43 and 44.

  On the other hand, the strength of the terminal surface 101 can be improved by forming the first and second recesses 43 and 44. 10 and 11 are a perspective view and a plan view showing the structure of the inner surface of the top cover 31, respectively. As described above, the top cover 31 is formed of an injection molded body of a synthetic resin material. In addition to the terminal windows 42 a to 42 d and the recesses 43, 44, the top cover 31 fixes the peripheral wall portion 310 fitted into the front end portion of the cell unit 30, a pair of reference pins 311 for positioning the wiring substrate 21, and the wiring substrate 21. And a pair of fixed claws 312.

  The first and second recesses 43 and 44 are formed by recessing predetermined portions of the top cover 31 in the Y-axis direction, and raised portions 313 and 314 are formed on the inner surface side of the top cover 31 corresponding to the formation positions. Is done. The pair of reference pins 311 are formed so as to face each other in the Z-axis direction, and determine the mounting position of the wiring board 21 with respect to the inner surface of the top cover 31. The pair of fixed claws 312 are respectively formed on the inner surface side of the peripheral wall portion 310 facing in the X-axis direction, and engage with both edges of the wiring board 21 positioned by the reference pin 111.

  On the other hand, the wiring board 21 has a pair of through holes 201a through which the pair of reference pins 311 pass, and notches 201b and 201c that are notched so as to avoid interference with the raised portions 313 and 314. Various circuit elements such as a thermistor, a discrimination circuit, and a protection circuit are mounted on the front side or the back side of the wiring board 21.

  In the top cover 31 configured as described above, the raised portions 313 and 314 function as ribs that increase the rigidity of the top cover 31 and improve the strength. Thereby, the terminal surface 101 can be protected from the drop impact of the battery pack 100, and destruction of the wiring board 21 and various elements mounted thereon can be prevented. Further, the wiring board 21 can be positioned with high accuracy with respect to the top cover 31 by the reference pins 111 and the fixing claws 312.

  Further, since the width dimension W1 of the first recess 43 is formed larger than the width dimension W2 of the second recess 44, the right side surface of the top cover 31 on which the terminals 21a to 21d of the terminal portion 20 are arranged to be biased. The rigidity of the end portion on the 15 side is increased. Thereby, the terminals 21a to 21d can be effectively protected from the drop impact.

  Furthermore, the top cover 31 of the present embodiment has both side surfaces facing each other in the width direction (Z-axis direction) formed by arcuate surfaces, and the first and second recesses 43 and 44 are formed on both side surfaces of the top cover 31. Are formed in the arc region (FIG. 12).

  FIG. 12 is a plan view showing the front surface of the top cover 31. Both side surfaces facing the width direction of the top cover 31 are formed as a part of a cylindrical surface with a predetermined radius, and when viewed from the front side of the top cover 31, the first and second recesses 43, 44 is provided in the area | region of the circumference CA to which both sides | surfaces belong, respectively. By defining the formation regions of the first and second recesses 43 and 44 in this way, the board area of the wiring board 21 arranged on the inner surface side of the top cover 31 can be secured. Moreover, since the two corners of the pack body (top cover 31) are notched due to the formation of the recesses 43 and 44, when the battery pack is accidentally dropped, compared to the case where there is a corner, The impact caused by dropping can be mitigated, and damage to the battery pack can be eliminated or minimized.

(Locking part)
The battery pack is typically configured to be able to be charged by an electronic device such as a charger. In this case, in order to maintain an appropriate connection state between the battery pack terminal and the contact of the charger, the battery pack needs to be stably held by the charger. Typically, in the battery pack, a terminal surface on which terminals are arranged and an end surface opposite to the terminal surface are locked to a battery mounting portion of the charger.
However, when the external force such as vibration or impact acts on the charger, the battery pack may be carelessly detached from the charger.
Therefore, in the present embodiment, for the purpose of preventing inadvertent detachment of the battery pack from the electronic device, the rear surface 14 of the pack body 10 is provided with a locking portion configured to be locked to the electronic device. .

  FIG. 13 is a bottom view of the battery pack 100 (pack body 10). A locking portion 51 is formed on the rear surface 14 of the pack body 10 formed on the surface of the bottom cover 32. The locking portion 51 is typically formed by a substantially rectangular concave portion, but may be formed by a convex portion or a flat surface. The locking portion 51 is disposed to be deviated to one side from the center P3 in the width direction (Z-axis direction) parallel to the X-axis direction, and is provided on the right side 15 side of the pack body 10 in this embodiment. ing.

  FIG. 14 is a cross-sectional view of a main part of the electronic device 200 showing a state when the battery pack 100 is attached to the battery attachment portion 203. The opening 203 b of the battery mounting portion 203 has a locking claw 208 and a lid 205. The locking part 51 is locked to the locking claw 208 when the battery pack 100 is inserted into the battery mounting part 203 in an appropriate posture. As a result, the battery pack 100 is fixed to the battery mounting portion 203.

  An elastic member (coil spring) 206 for discharging the battery pack 100 is disposed on the bottom 203a of the battery mounting portion 203. The elastic member 206 urges the terminal surface 101 of the battery pack 100 inserted into the battery mounting portion 203 to be discharged toward the opening 203b. Since the elastic member 206 and the latching claw 208 are arranged at substantially diagonal positions of the battery pack 100, the elastic force of the elastic member 206 causes the battery pack 100 to be attached to the battery mounting portion 203 as shown in FIG. A moment to rotate around an axis parallel to the X axis is generated inside. Thereby, since it acts so that the connection of terminal 21a-21d of the terminal surface 101 and contact 3a-3d of the battery mounting part 203 may be strengthened, the stable electrical connection between the battery pack 100 and the electronic device 200 can be achieved. .

  Depending on the type of electronic device, there is one provided in the opening 203b in such a positional relationship that the locking claw 208 faces the elastic member 206. In this case, the locking portion 51 may be provided on the left side 16 side of the pack body 10 or may be provided on both side surfaces.

  Further, the locking portion 51 is disposed on the rear surface 14 of the pack body 10 so as to be biased toward the lower surface 12 side rather than the upper surface 11 side. In the present embodiment, as shown in FIG. 13, the locking portion 51 is disposed so as to be biased toward the lower surface 12 side of the pack body 10 with respect to the center line P4 on the rear surface 14 parallel to the Z axis. Thereby, for example, careless detachment of the battery pack 100 from an electronic apparatus having a battery mounting portion as shown in FIG. 15 can be suppressed.

  An electronic apparatus 210 shown in FIG. 15 has a battery mounting part 213 that can accommodate the battery pack 100 on the upper surface part. The battery mounting portion 213 has a pair of inner wall surfaces facing in the Y-axis direction, and a contact portion 215 connected to the terminal surface 101 (terminal portion 20) of the battery pack 100 is disposed on one inner wall surface. A locking claw 214 that is locked to the rear surface 14 (locking portion 51) of the battery pack 100 is disposed on the inner wall surface of the battery pack 100. The battery pack 100 is mounted on the battery mounting portion 213 while rotating the rear surface 14 in the direction indicated by the arrow A around the axis parallel to the Z axis with the terminal surface 101 in contact with the contact portion 215. Examples of the electronic device 210 that employs the battery mounting portion 213 having such a structure include a charger.

  Here, the terminals 21a to 21d and the locking part 51 of the terminal part 20 are respectively located on the upper surface 11 side and the lower surface 12 side with a center line P5 (FIG. 15) in the thickness direction parallel to the Y-axis direction of the pack body 10 interposed therebetween. Has been placed. In many cases, the battery mounting portion 213 has a structure in which either the contact portion 215 or the locking claw 214 presses the terminal portion 20 or the locking portion 51 with an elastic force. Therefore, in a state where the battery pack 100 is mounted on the battery mounting portion 213, the battery pack 100 is held in a state where a moment is applied in the direction indicated by the arrow A. Therefore, even when an external force such as vibration acts on the electronic device 210 in the direction in which the battery pack 100 is detached from the battery mounting portion 213 (the direction indicated by the arrow B opposite to the direction indicated by the arrow A), the battery pack 100 is stabilized. Can be held in.

(Battery pack size)
As shown in FIGS. 2 and 3, the battery pack 100 of the present embodiment has a thickness direction in the X-axis direction, a length direction in the Y-axis direction, and a width direction in the Z-axis direction. In the present embodiment, the dimension (Dx) in the thickness direction is 9 mm ± 2 mm, the dimension (Dy) in the length direction is 43 mm ± 2 mm, and the dimension (Dz) in the width direction is 30 mm ± 2 mm. As an example, Dx = 9.13 mm (+0.37 mm, −0.10 mm), Dy = 42.64 mm (± 0.16 mm), and Dz = 29.85 mm ± 0.15 mm.

  In recent years, a battery pack is required to be thin and small while having a necessary battery capacity. However, it is difficult for a thin battery pack to have a large battery capacity. When the length dimension and width dimension of the thin battery pack are increased, interference with a structure such as a lens barrel occurs, which makes it difficult to reduce the size of the camera body. On the other hand, when the thickness dimension of the battery pack is increased, it becomes impossible to meet the recent demand for thinner electronic devices.

  Therefore, in the battery pack 100 of the present embodiment, the dimensions of each part of the battery pack 100 are set as described above in order to reduce the thickness and ensure the necessary battery capacity. The battery pack 100 having such a size is suitable, for example, as a battery pack for an imaging apparatus that captures a still image or a moving image.

(Terminal window shape)
In the battery pack 100 of the present embodiment, the top cover 31 includes a plurality of rectangular terminal windows 42 that expose the terminals 21a to 21d of the terminal portion 20 to the outside.
In general, when an opening such as a terminal window is formed in a cover attached to the end face of the battery pack, the rigidity of the cover is reduced, and the cover is easily damaged by receiving an external force such as a drop impact.
Therefore, in the present embodiment, in order to increase the durability of the top cover 31 against a drop impact or the like, one corner portion of the terminal window located on the outermost side in the Z-axis direction among the plurality of terminal windows 42 is the other terminal window. It is formed with a larger radius of curvature than the corners.

  FIG. 16 is a plan view showing the shape of the terminal window 42 (42 a to 42 d) of the top cover 31. In the present embodiment, one corner portion C1 of the terminal window 42a for the plus terminal 21a located on the outermost side in the Z-axis direction among the plurality of terminal windows 42a to 42d has a larger radius of curvature than the other corner portions C0. Is formed. The other corner portions of the terminal window 42a other than the corner portion C1 and the corner portions of the other terminal windows 42b to 42d other than the terminal window 42a are formed with the same radius of curvature as the corner portion C0.

  The terminal window 42 a disposed on the outermost side in the width direction of the top cover 31 is most susceptible to external forces such as a drop impact applied to the battery pack 100, and the top cover 31 is easily damaged. In this embodiment, since the corner portion C1 having a radius of curvature larger than that of the other corner portion C0 is provided in a part of the terminal window 42a, the rigidity of the portion of the corner portion C1 is increased to protect the top cover 31 from damage. can do. Further, it is possible to protect the positive terminal 21a exposed from the terminal window 42a.

  The corner portion C <b> 1 is a corner portion provided closest to any one of the upper surface 11, the lower surface 12, the front surface 13, the rear surface 14, the right side surface 15, and the left side surface 16 of the pack body 10. Thereby, damage to the top cover 31 due to external force applied to the one surface can be suppressed. In the present embodiment, the corner portion C <b> 1 is provided closest to the upper surface 11 or the right side surface 15 of the pack body 10.

  The corner portion C1 is a corner portion provided closest to any one of the right side surface 15 and the left side surface 16 of the pack body 10. Thereby, damage to the top cover 31 due to external force applied to the one surface can be suppressed. In the present embodiment, the corner portion C <b> 1 is provided closest to the right side surface 15 of the pack body 10.

  The top cover 31 has four corners M1, M2, M3, and M4. In the present embodiment, the corner portion C1 is located closest to one corner M1 among the four corners M1 to M4. Is provided. Thereby, the terminal window 42a can be effectively protected from the external force applied to the corner M1. The corner portion C1 is not limited to the example provided at the above-described position. For example, the corner portion of the terminal window 42a adjacent to the corner portion M2 or the terminal window 42d for the control terminal 21d adjacent to the corner portions M3 and M4. You may provide in a corner part.

  In the present embodiment, the plurality of terminal windows 42 a to 42 d are arranged so as to be biased toward the upper surface 11 side of the battery pack 100. In the present embodiment, since the corner portion C1 of the terminal window 42a adjacent to the corner portion M1 is formed with a larger radius of curvature than the other corner portions C0, even if the distance between the corner portion M1 and the terminal window 42a is close. The stress concentration generated between them can be reduced, and the top cover 31 can be protected from breakage.

  Further, in the present embodiment, the plurality of terminal windows 42 a to 42 d are arranged so as to be biased toward the right side surface of the battery pack 100. Even in such a case, stress concentration generated between the corner M1 and the terminal window 42a can be reduced, and damage to the top cover 31 such as cracking of the terminal surface 101 can be prevented.

[Modification]
As mentioned above, although embodiment of this technique was described, this technique is not limited only to the above-mentioned embodiment, Of course, in the range which does not deviate from the summary of this technique, various changes can be added.

For example, in the above embodiment, the pack body 10 is configured by a combination of the cell unit 30, the top cover 31, and the bottom cover 32. However, the present invention is not limited to this, and the pack body is configured by a single component. May be.
The right side surface 15 and the left side surface 16 are configured to be formed as arcuate surfaces that protrude outward. It may be configured.

Moreover, in the above embodiment, the terminal part 20 is arrange | positioned between the cell unit 30 and the top cover 31, and the terminal 21a-21d of the terminal part 20 is exposed outside via the terminal window 42 of the top cover 31. However, the terminals of the terminal portion may be provided directly on the front surface of the pack body.
The terminal unit 20 is configured to be arranged in the order of the control terminal, the minus terminal, the temperature detection terminal, and the plus terminal along the Z axis, but is not limited thereto, and the control terminal, the plus terminal, A configuration in which the temperature detection terminal and the minus terminal are arranged in this order may be employed.

  The terminals 20a to 20d of the terminal portion 20 are arranged to be biased toward the upper surface 11 side of the battery pack 100, but may be disposed to be biased to the substantially central portion of the terminal surface 101 or the lower surface 12 side. In this case, the first and second recesses 43 and 44 may be arranged to be biased toward the upper surface 11 side of the battery pack 100.

  Moreover, although the terminals 20a to 20d of the terminal portion 20 are arranged biased toward the right side surface 15 of the battery pack 100, they may be biased toward the left side surface 16 side. In this case, of the first and second recesses 43 and 44, the second recess 44 provided on the left side 16 side may be formed with a larger width dimension than the first recess 43.

In addition, the 1st and 2nd recessed parts 43 and 44 are provided in the terminal surface 101 in order to prevent incorrect insertion, and may be abbreviate | omitted according to a specification. Similarly, the locking portion 51 formed on the rear surface 14 of the battery pack 100 may be omitted depending on the specification.
The top cover 31 includes a pair of reference pins 311 for positioning the wiring board 21 and a pair of fixing claws 312 for fixing the wiring board 21. However, the configuration is not limited thereto, and the reference pin 311 and the fixing claws 312 are provided. There may be no configuration. In that case, the wiring board 21 does not have a pair of through holes 201a through which the pair of reference pins 311 penetrate.

In addition, this technique can also take the following structures.
(1) First and second main surfaces opposing each other in the first axial direction, and first and second end surfaces opposing each other in a second axial direction orthogonal to the first axial direction A pack body having first and second side surfaces facing each other in a third axial direction orthogonal to the first and second axial directions;
A positive terminal, a negative terminal, a temperature detection terminal, and a control terminal respectively arranged on the first end surface along the third axial direction, wherein the negative terminal includes the temperature detection terminal and the control terminal; A battery pack comprising a plurality of terminals disposed between the temperature detection terminal side and the control terminal side in between.
(2) The battery pack according to (1) above,
The first end surface is
A first terminal window for exposing the control terminal to the outside;
A second terminal window provided with a first gap from the first terminal window and exposing the negative terminal to the outside;
A third terminal window that is provided with a second gap larger than the second terminal window and the first gap to expose the temperature detection terminal to the outside;
A battery pack having a fourth terminal window for exposing the positive terminal to the outside.
(3) The battery pack according to (1) or (2) above,
The temperature detection terminal is disposed between the minus terminal and the plus terminal.
(4) The battery pack according to (3) above,
The positive terminal has a larger area than the negative terminal.
(5) The battery pack according to any one of (1) to (4) above,
The first end surface includes a first concave portion provided on the first side surface side and a second concave portion provided on the second side surface side,
The said 1st and 2nd recessed part is a battery pack arrange | positioned in the said 2nd main surface side rather than the said 1st main surface side in the said 1st end surface.
(6) The battery pack according to (5) above,
The plurality of terminals are arranged at the first end face so as to be biased toward the first side face rather than the second side face.
(7) The battery pack according to (5) above,
The first recess has a larger width dimension in the third axial direction than the second recess.
(8) The battery pack according to (7) above,
The first recess and the second recess each have a depth dimension of 1.8 mm or more along the second axial direction.
(9) The battery pack according to any one of (1) to (8) above,
The plurality of terminals are arranged in the first end surface so as to be biased toward the first main surface rather than the second main surface. Battery pack.
(10) The battery pack according to (9) above,
The second end surface has a locking portion configured to be locked to an electronic device,
The said latching | locking part is biased and arrange | positioned in the said 2nd main surface side rather than the said 1st main surface side in the said 2nd end surface.

Further, the present technology can also take the following configurations.
(1) a first main surface;
A second main surface facing the first main surface in a first axial direction;
A plurality of terminals provided between the first main surface and the second main surface and including a plus terminal, a minus terminal, a temperature detection terminal, and a control terminal, wherein the plurality of terminals are the second terminal; A first end face that is arranged to be biased toward the first main surface side rather than the main surface side;
The second main surface is configured to be opposed to the first end surface in a second axial direction orthogonal to the first axial direction and to be able to be locked to a battery pack mounting device than the first main surface side. A second end surface having a locking portion arranged biased to the side;
A first side surface provided between the first main surface and the second main surface;
A battery pack comprising: a second side surface facing the first side surface in a third axial direction orthogonal to the first axial direction and the second axial direction.
(2) The battery pack according to (1) above,
The first end surface further includes a first recess provided on the first side surface side, and a second recess provided on the second side surface side,
The battery pack according to claim 1, wherein the first concave portion and the second concave portion are arranged to be biased toward the second main surface side rather than the first main surface side at the first end surface.
(3) The battery pack according to (2) above,
The plurality of terminals are arranged at the first end face so as to be biased toward the first side face rather than the second side face.
(4) The battery pack according to (3) above,
The first recess has a first width dimension in the third axial direction;
The second recess has a second width dimension smaller than the first width dimension in the third axial direction.
(5) The battery pack according to (4) above,
The first recess and the second recess each have a depth dimension of 1.8 mm or more along the second axial direction.
(6) The battery pack according to any one of (1) to (5) above,
The plurality of terminals are arranged at the first end face so as to be biased toward the first side face rather than the second side face.
(7) The battery pack according to (6) above,
The said latching | locking part is biased and arrange | positioned in the said 1st side surface side rather than the said 2nd side surface side in the said 2nd end surface.
(8) The battery pack according to (7) above,
The said latching | locking part is a battery pack arrange | positioned rather than the terminal located in the said 1st side surface among the said some terminals.

Further, the present technology can also take the following configurations.
(1) A battery pack for an imaging device that captures at least one of a still image and a moving image,
A first main surface;
A second main surface facing the first main surface in the first axial direction and having a distance of 9 mm ± 2 mm from the first main surface;
A first end surface provided between the first main surface and the second main surface;
A second end surface facing the first end surface in a second axial direction perpendicular to the first axial direction and having a distance of 43 mm ± 2 mm from the first end surface;
A first side surface provided between the first main surface and the second main surface;
A second side surface facing the first side surface in a third axial direction orthogonal to the first axial direction and the second axial direction, and having a distance of 30 mm ± 2 mm from the first side surface; A battery pack comprising:
(2) The battery pack according to (1) above,
The first end surface has a plurality of terminals including a plus terminal, a minus terminal, a temperature detection terminal, and a control terminal.
(3) The battery pack according to (2) above,
The first end surface further includes a first recess provided on the first side surface side, and a second recess provided on the second side surface side,
The battery pack according to claim 1, wherein the first concave portion and the second concave portion are arranged to be biased toward the second main surface side rather than the first main surface side at the first end surface.
(4) The battery pack according to (3) above,
The plurality of terminals are arranged in the first end surface so as to be biased toward the first main surface rather than the second main surface. Battery pack.
(5) The battery pack according to (4) above,
The second end surface has a locking portion configured to be locked to the battery pack mounting device,
The said latching | locking part is biased and arrange | positioned in the said 2nd main surface side rather than the said 1st main surface side in the said 2nd end surface.

Furthermore, the present technology can also employ the following configurations.
(1) First and second main surfaces opposing each other in the first axial direction, and first and second end surfaces opposing each other in a second axial direction orthogonal to the first axial direction A pack body having first and second side surfaces facing each other in a third axial direction orthogonal to the first and second axial directions;
A terminal window that is attached to the first end face and has a plurality of rectangular terminal windows that expose each of the plurality of terminals to the outside, and is located on the outermost side in the third axial direction among the plurality of terminal windows. And a top cover having a larger radius of curvature than the other corners of the terminal window.
(2) The battery pack according to (1) above,
The top cover has four corners,
The one corner portion is a corner portion provided closest to any one of the four corner portions of the top cover.
(3) The battery pack according to (1) above,
The one corner portion is closest to any one of the first and second main surfaces, the first and second end surfaces, and the first and second side surfaces of the pack body. A battery pack that is a corner part provided.
(4) The battery pack according to (1) above,
The one corner portion is a corner portion provided closest to either one of the first and second side surfaces of the pack body.
(5) The battery pack according to any one of (1) to (4) above,
The plurality of terminal windows are arranged to be biased toward the first main surface side rather than the second main surface side.
(6) The battery pack according to any one of (1) to (5) above,
The plurality of terminal windows are arranged so as to be biased toward the first side surface rather than the second side surface.

DESCRIPTION OF SYMBOLS 10 ... Pack main body 20 ... Terminal part 21a ... Plus terminal 21b ... Negative terminal 21c ... Temperature detection terminal 21d ... Control terminal 42, 42a-42d ... Terminal window 43 ... 1st recessed part 44 ... 2nd recessed part 51 ... Locking part DESCRIPTION OF SYMBOLS 100 ... Battery pack 101 ... Terminal surface 200,210 ... Electronic device

Claims (15)

A first main surface and a second main surface substantially opposite to each other in a first axial direction; a first end surface and a second end surface substantially opposite to each other in a second axial direction perpendicular to the first axial direction; Comprising first and second side surfaces substantially opposite each other in a third axial direction orthogonal to the first and second axial directions,
The first end surface is
A plurality of terminal windows that are arranged on the first main surface side rather than the second main surface side and expose the terminals to the outside in a second axial direction orthogonal to the first axial direction;
Provided in a region closer to the second main surface than the center line of the first end surface parallel to the third axial direction, and one of the first axial direction, one of the second axial directions, and A first recess opened to one of the third axial directions;
Provided in a region closer to the second main surface than the center line of the first end surface parallel to the third axial direction, and one of the first axial direction, one of the second axial directions, and A second recess opened to the other in the third axial direction,
A region of the outer periphery of the first end surface that is opposed to the third axial direction is formed by a curved portion, and the first and second recesses are outer periphery including the curved portion of the first end surface. Battery pack opened to the side. The battery pack according to claim 1,
The first recess has a first width dimension in the third axial direction;
The second recess has a second width dimension smaller than the first width dimension in the third axial direction. The battery pack according to claim 1 or 2,
The first recess and the second recess each have a depth dimension of 1.8 mm or more along the second axial direction. The battery pack according to any one of claims 1 to 3,
The curved portion is formed of a part of a circle. The battery pack according to any one of claims 1 to 4,
The battery pack in which the plurality of terminal windows are arranged to be biased toward the first side surface side rather than the second side surface side. The battery pack according to any one of claims 1 to 5,
The plurality of terminal windows are arranged so as to be biased toward the first concave portion side rather than the second concave portion side. The battery pack according to any one of claims 1 to 6,
The plurality of terminal windows include at least a first terminal window that exposes a plus terminal to the outside, a second terminal window that exposes a minus terminal to the outside, and a third terminal window that exposes a temperature detection terminal to the outside. Including battery pack. The battery pack according to claim 7,
The plurality of terminal windows are arranged in the order of the first terminal window, the third terminal window, and the second terminal window. The battery pack according to claim 7 or 8,
The battery pack is arranged such that the first terminal window is biased toward the first side surface rather than the second side surface. The battery pack according to any one of claims 1 to 9,
The first side surface and the second side surface have curved surfaces. The battery pack according to claim 10, wherein
The first side surface and the second side surface have a circular arc cross section. The battery pack according to any one of claims 1 to 11,
The first side surface and the second side surface are substantially symmetrical with each other. The battery pack according to any one of claims 1 to 12,
The plurality of terminal windows are four terminal windows. The battery pack according to any one of claims 1 to 13,
A wiring board disposed on the inner side of the first end face and having the terminal;
The wiring board includes a cutout portion in which portions corresponding to the first and second recesses are cut out. The battery pack according to any one of claims 1 to 14,
A center line of the plurality of terminal windows parallel to the third axial direction is located in a region closer to the first main surface than a center line of the first end surface parallel to the third axial direction. Battery pack.

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