JP2013232280A - Battery pack for saddle-riding type vehicle and saddle-riding type vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery pack for saddle-riding type vehicle in which heat dissipation is high although the energy amount can be increased, and a planar space where a plurality of batteries are disposed can be reduced, and to provide a saddle-riding type vehicle using the battery pack.SOLUTION: A battery pack 10 has a case 12 and a battery unit 22 being housed therein. The case 12 includes a first housing section X1, a second housing section X2, and a connection section X3. The first housing section X1 and the second housing section X2 are formed while holding a heat dissipation space 84 therebetween. The battery unit 22 includes a first battery unit 24 and a second battery unit 26. The first battery unit 24 is housed in the first housing section X1, and the second battery unit 26 is housed in the second housing section X2. The first battery unit 24 and the second battery unit 26 are connected electrically by a connection X4. Heat generated in the first battery unit 24 and the second battery unit 26 is discharged to the heat dissipation space 84.

Description

  The present invention relates to a battery pack and a straddle-type vehicle, and more particularly to a battery pack having a plurality of rechargeable batteries and a straddle-type vehicle including the battery pack.

  In a battery pack in which a plurality of batteries are connected in series or in parallel with a lead plate, it is important to efficiently dissipate each battery. In particular, a battery pack in which a large number of batteries are connected in series or in parallel and has a large charge / discharge current has a large amount of heat generated by the battery. Therefore, it is important to efficiently dissipate the heat generated by the battery. In order to realize this, for example, a battery pack disclosed in Patent Document 1 is proposed.

  The battery pack disclosed in Patent Literature 1 includes an exterior case, and the battery assembly is accommodated in the exterior case. The battery assembly includes a plurality of batteries connected by a lead plate, and a heat dissipation plate is fixed to the surface of the lead plate. And an elastic heat conductive sheet is laminated | stacked between an exterior case and a heat radiating plate, and the heat | fever of a heat radiating plate is thermally radiated outside from an exterior case through this elastic heat conductive sheet.

JP 2009-176589 A

  In recent years, it has been desired to increase the energy capacity of such battery packs. However, in order to increase the amount of energy in the battery pack described above, a plurality of batteries are arranged in a plane, and a plane space for arranging the plurality of batteries must be increased.

  In this case, there is no problem in heat dissipation, but a large space is required when the battery pack is mounted on a vehicle or the like. In particular, when the battery pack is mounted on a saddle-type electric vehicle, it is difficult to mount the battery pack due to space limitations, and the degree of freedom in layout is reduced.

  Therefore, a main object of the present invention is to provide a battery pack for a saddle-ride type vehicle, which has high heat dissipation and can reduce a planar space for arranging a plurality of batteries, although the amount of energy can be increased. It is to provide a straddle type vehicle used.

  In order to achieve the above-described object, a battery pack for a saddle-ride type vehicle according to claim 1 includes a first housing portion, a second housing portion, a first housing portion and a first housing portion formed with a heat dissipation space interposed therebetween. 2 includes one case having a connecting portion for connecting the receiving portions, a plurality of rechargeable batteries arranged in parallel to each other, and a lead plate for connecting one end portions of the respective batteries, and is received in the first receiving portion. A first battery unit, a plurality of rechargeable batteries arranged in parallel to each other, a lead plate connecting one end of each battery, and a second battery unit housed in a second housing part, A connecting unit that electrically connects the plurality of batteries of the battery unit and the plurality of batteries of the second battery unit;

  The battery pack of the saddle riding type vehicle according to claim 2 is the battery pack of the saddle riding type vehicle according to claim 1, wherein the case includes a first case portion positioned outside the first battery unit, and a first case. A second case portion positioned between the battery unit and the heat dissipation space and combined with the first case portion; and a third case portion positioned between the heat dissipation space and the second battery unit and combined with the second case portion. A case part and a fourth case part that is located outside the second battery unit and is combined with the third case part, wherein the first case part and the second case part form a first housing part, and the second case And the third case portion form a connecting portion, the third case portion and the fourth case portion form a second housing portion, and a heat dissipation space is provided between the second case portion and the third case portion. It is formed.

  The battery pack of the saddle riding type vehicle according to claim 3 is the battery pack of the saddle riding type vehicle according to claim 1, wherein the connecting portion is housed in a case.

  The battery pack of the saddle riding type vehicle according to claim 4 is the battery pack of the saddle riding type vehicle according to claim 3, wherein the connecting portion is provided so as to pass through the connecting portion, and the connecting portion is a second accommodating portion. When the first battery unit is viewed from at least a part of the connecting part overlaps the first battery unit, and when the second battery unit is viewed from the first housing part, at least a part of the connecting part is the second battery unit. It is formed so that it may overlap.

  The battery pack of the saddle riding type vehicle according to claim 5 is the battery pack of the saddle riding type vehicle according to claim 1, wherein the battery has a substantially cylindrical shape, and the length in the axial direction of the battery is a diameter of the battery. The battery is arranged so that one end face of the battery faces the space for heat dissipation.

  The battery pack of the saddle riding type vehicle according to claim 6 is the battery pack of the saddle riding type vehicle according to claim 1, wherein the heat radiation space is a through hole.

  The battery pack of the saddle riding type vehicle according to claim 7 is the battery pack of the saddle riding type vehicle according to claim 1, wherein the first battery unit and the second battery unit are electrically connected in parallel. It is characterized by that.

  The battery pack of the saddle riding type vehicle according to claim 8 is the battery pack of the saddle riding type vehicle according to claim 1, wherein the first battery unit and the second battery unit are electrically connected in series. It is characterized by that.

  A battery pack for a saddle-ride type vehicle according to claim 9 is the battery pack for a saddle-ride type vehicle according to claim 1, comprising a single control unit for controlling the first battery unit and the second battery unit. Features.

  A straddle-type vehicle according to a tenth aspect includes the battery pack according to any one of the first to ninth aspects.

  In the battery pack of the saddle-ride type vehicle according to claim 1, the first battery unit is accommodated in the first accommodating portion of the case, the second battery unit is accommodated in the second accommodating portion, and the plurality of first battery units The battery and the plurality of batteries of the second battery unit are electrically connected by the connecting portion. Thus, since it has the 1st battery unit and the 2nd battery unit electrically connected mutually by the connection part, energy amount can be enlarged. Nevertheless, since the first battery unit and the second battery unit are arranged with the heat dissipation space interposed therebetween, the planar space for arranging a plurality of batteries is not increased, and the first battery unit and Since the heat generated in the second battery unit can be efficiently radiated from the heat radiating space, the heat dissipation can be enhanced.

  In the battery pack of the saddle riding type vehicle according to claim 2, the first housing portion is formed by combining the first case portion and the second case portion, and the second case portion and the third case portion are combined. Thus, the connecting portion is formed, and the second housing portion is formed by combining the third case portion and the fourth case portion. Further, by combining the second case portion and the third case portion, a heat dissipation space is formed between the second case portion and the third case portion. In this way, a case can be easily obtained.

  In the battery pack of the saddle riding type vehicle according to claim 3, the connection portion for electrically connecting the first battery unit and the second unit is accommodated in the case. Here, when a part of the connection part for electrically connecting the first battery unit and the second battery unit is provided outside the case, a guide part for guiding the connection part to the outside of the case (For example, a hole penetrating the case) must be provided in the case. In this case, since the sealing performance of the case is reduced in the guide portion, it is necessary to take measures (such as a waterproof seal) for increasing the sealing performance of the case. However, in the battery pack according to the present invention, since the connection portion is accommodated in the case, it is not necessary to provide a guide portion for guiding the connection portion to the outside of the case. Therefore, there is no need for measures for improving the sealing performance as described above, and the sealing performance of the case can be easily increased.

  5. The battery pack of the saddle riding type vehicle according to claim 4, wherein when the first battery unit is viewed from the second housing portion, the connecting portion overlaps at least a part of the first battery unit with the first housing. When the second battery unit is viewed from the portion, at least a part of the connecting portion overlaps the second battery unit. In this case, since the planar size of the case can be reduced, the battery pack can be made compact. In the battery pack according to the present invention, the connecting portion plays a role of connecting the first housing portion and the second housing portion, and also plays a role of guiding the connecting portion from the first housing portion to the second housing portion. . Therefore, in the battery pack according to the present invention, it is not necessary to provide a configuration for guiding the connecting portion from the first housing portion to the second housing portion separately from the connecting portion. As a result, the configuration of the battery pack can be simplified.

  In the battery pack of the saddle riding type vehicle according to claim 5, a plurality of batteries are arranged so that one end face of each battery faces the heat radiation space. Thereby, the heat generated by each battery can be efficiently released to the heat dissipation space. In the battery pack according to the present invention, a substantially cylindrical battery is used, and the length of the battery in the axial direction is longer than the diameter of the battery. Therefore, by arranging a plurality of batteries so that one end surface of each battery faces the space for heat dissipation, a plurality of batteries are arranged in comparison with a case where a plurality of batteries are arranged so that the outer peripheral surface of each battery faces the space for heat dissipation. A planar space for arranging the battery can be reduced. As a result, a compact battery pack with improved heat dissipation can be obtained.

  In the battery pack of the saddle riding type vehicle according to claim 6, the heat dissipation can be further improved by forming the heat dissipation space as a through hole.

  In the battery pack of the saddle riding type vehicle according to claim 7, the energy capacity of the battery pack can be sufficiently increased by electrically connecting the first battery unit and the second battery unit in parallel.

  In the battery pack of the saddle riding type vehicle according to claim 8, the output voltage of the battery pack can be sufficiently increased by electrically connecting the first battery unit and the second battery unit in series.

  In the battery pack of the saddle riding type vehicle according to claim 9, since the first battery unit and the second battery unit can be controlled by one control unit, the control system of the battery pack can be constructed with a simple configuration.

  In a saddle-ride type vehicle equipped with a battery pack, a large amount of energy is required for the battery pack. On the other hand, a space for arranging each component is limited, and a space for mounting the battery pack is limited. The battery pack according to the present invention can be suitably used for a straddle-type vehicle because the planar space for arranging a plurality of batteries can be reduced although the amount of energy can be increased.

  According to the present invention, it is possible to obtain a battery pack and a straddle-type vehicle using the battery pack that can increase the amount of energy, do not increase a planar space for arranging a plurality of batteries, and have high heat dissipation. it can.

It is a front perspective view which shows the battery pack of one Embodiment of this invention. It is a front perspective view which shows the battery unit accommodated in the case of a battery pack. It is a back perspective view which shows the battery unit accommodated in the case of a battery pack. It is a disassembled perspective view which shows the battery pack of FIG. It is a top view solution figure which shows a battery pack. It is a front view solution figure which shows a battery pack. It is a disassembled perspective view which shows a 1st battery unit. It is a side view solution figure which shows a battery pack. It is a disassembled perspective view which shows a 2nd battery unit. It is a circuit diagram which shows the electric circuit of a battery unit. It is a rear view which shows a connection unit. It is sectional drawing which shows a connection unit. It is a perspective view which shows the battery pack of other embodiment of this invention. It is a front perspective view which shows the other example of a battery unit. It is a back perspective view which shows the other example of a battery unit. It is a disassembled perspective view which shows the battery pack of other embodiment. It is a front view solution figure which shows the battery pack of other embodiment. It is a top view solution figure which shows the battery pack of other embodiment. It is a bottom view solution figure which shows the battery pack of other embodiment. It is a disassembled perspective view which shows the other example of a 2nd battery unit. It is a side view solution figure which shows the battery pack of other embodiment. It is a circuit diagram which shows the electric circuit of a battery unit. It is a side view showing an electric motorcycle.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front perspective view showing a battery pack 10 according to an embodiment of the present invention. In addition, in order to clarify the positional relationship of each component of the battery pack 10, the arrow which shows the front-back direction and the left-right direction is attached | subjected to FIG. In other drawings, arrows indicating the front-rear direction and the left-right direction are appropriately attached.

  Referring to FIG. 1, the battery pack 10 includes a casing-shaped case 12. The case 12 includes a first case part 14, a second case part 16, a third case part 18, and a fourth case part 20. The 1st case part 14, the 2nd case part 16, the 3rd case part 18, and the 4th case part 20 are formed with insulating materials, such as resin, for example.

  FIG. 2 is a front perspective view showing the battery unit 22 housed in the case 12, and FIG. 3 is a rear perspective view showing the battery unit 22. FIG. 4 is an exploded perspective view showing the battery pack 10.

  2 to 4, battery unit 22 (see FIGS. 2 and 3) includes a first battery unit 24 and a second battery unit 26. A connecting unit 28 is provided so as to connect the rear end portion of the first battery unit 24 and the rear end portion of the second battery unit 26. In FIG. 4, the connecting unit 28 is shown connected to the first battery unit 24.

  Referring to FIG. 4, the first battery unit 24 is disposed between the first case portion 14 and the second case portion 16, and the second battery unit 26 is composed of the third case portion 18 and the fourth case portion 20. Between.

Hereinafter, each component of the battery pack 10 will be described in detail.
FIG. 5 is an illustrative plan view showing the battery pack 10. FIG. 5 shows a cut surface of the case 12 when the case 12 is cut at the center in the vertical direction. FIG. 6 is an illustration of a front view showing the battery pack 10. FIG. 6 shows a cut surface of the case 12 when the case 12 is cut along the line AA in FIG. In FIGS. 5 and 6, the battery unit 22 is shown in a simplified manner in order to prevent the drawings from becoming complicated.

  With reference to FIG. 1 and FIGS. 4-6, the 1st case part 14 contains the thermal radiation part 32 which protrudes from the support part 30 and the support part 30 to the left direction. Referring to FIGS. 1 and 6, support portion 30 includes a frame portion 34 so that a substantially rectangular opening 34 a (see FIG. 6) is formed at the right end portion thereof. The support portion 30 further includes a side wall portion 36 provided on the left side of the upper end portion of the frame portion 34 and a side wall portion 38 provided on the left side of the lower end portion of the frame portion 34. The side wall part 36 and the side wall part 38 are provided substantially perpendicular to the frame part 34.

  Referring to FIGS. 1, 4 and 6, side wall portion 36 has a pair of bosses 36a extending in the right direction. Each boss 36a has a hollow substantially cylindrical shape. One boss 36 a is provided at the front end of the side wall 36, and the other boss 36 a is provided at the rear end of the side wall 36. 4 and 6, like the side wall portion 36, the side wall portion 38 has a pair of bosses 38 a extending in the right direction. One boss 38 a is provided at the front end of the side wall 38, and the other boss 38 a is provided at the rear end of the side wall 38.

  Referring to FIGS. 1, 5, and 6, the heat radiating portion 32 includes a plate-like upper wall portion 40 a (see FIGS. 1 and 6) that extends leftward from the lower end portion of the side wall portion 36, and the upper end of the side wall portion 38. A plate-like lower wall portion 40b (see FIGS. 1 and 6) extending leftward from the portion, and from the frame portion 34 leftward so as to connect the front end portion of the upper wall portion 40a and the front end portion of the lower wall portion 40b. A plate-like front wall portion 40c (see FIGS. 1 and 5) that extends, and a plate that extends leftward from the frame portion 34 so as to connect the rear end portion of the upper wall portion 40a and the rear end portion of the lower wall portion 40b. 40d (refer FIG. 1 and FIG. 5). Referring to FIG. 1, the heat radiating portion 32 further includes a plate-like side wall portion 42 provided continuously at the left end portions of the upper wall portion 40a, the lower wall portion 40b, the front wall portion 40c, and the rear wall portion 40d. The side wall part 42 has a plurality of (seven in this embodiment) through holes 42 a arranged side by side in the vertical direction.

  Referring to FIGS. 1, 4, and 5, the second case portion 16 includes a frame portion 44 that is substantially rectangular in a side view, a frame portion 46 that is substantially rectangular in a side view extending rightward from a front end portion of the frame portion 44, and A frame portion 48 that is substantially rectangular in side view and extends in the right direction from the rear end portion of the frame portion 46 is included. The frame portion 46 and the frame portion 48 are provided so as to be separated in the front-rear direction and substantially parallel to each other. In FIG. 1, the boundary between the frame portion 44 and the frame portion 46 and the boundary between the frame portion 44 and the frame portion 48 are indicated by alternate long and short dash lines.

  Referring to FIGS. 4 and 5, second case portion 16 further includes a rectangular plate-like portion 50 provided at the right end portion of frame portion 44 so as to connect frame portion 46 and frame portion 48. . The upper end portion and the lower end portion of the plate-like portion 50 are connected to the frame portion 44. The frame part 46 and the frame part 48 protrude to the right side of the plate-like part 50. With reference to FIG. 4, the plate-like portion 50 has a plurality of (six in this embodiment) through holes 50 a arranged side by side in the vertical direction.

  With reference to FIGS. 4 and 5, in the second case portion 16, a substantially rectangular parallelepiped opening 44 a is formed by the frame portion 44, and a substantially rectangular parallelepiped through hole 46 a penetrating in the left-right direction is formed by the frame portion 46. Then, a substantially rectangular parallelepiped through-hole 48a penetrating in the left-right direction is formed by the frame portion 48. The through hole 46a and the through hole 48a communicate with the opening 44a, respectively.

  With reference to FIGS. 5 and 6, a groove 44 b is formed along the left edge of the frame 44. The groove 44b opens toward the left. In FIG. 4, the groove 44b is not shown in order to avoid the drawing from being complicated.

  4 to 6, in a state where the annular waterproof seal 52 is fitted in the groove 44 b (see FIGS. 5 and 6), the frame portion 34 of the first case portion 14 is formed in the groove 44 b (see FIGS. 5 and 6). 6). Thereby, the 1st case part 14 and the 2nd case part 16 are connected. The first case portion 14 and the second case portion 16 are further fixed to each other by a plurality of fasteners (not shown) such as screws. The waterproof seal 52 prevents water outside the case 12 from entering the case 12 through between the first case part 14 and the second case part 16.

  Referring to FIG. 1 and FIGS. 4 to 6, the third case portion 18 includes frame portions 54 and 56 that are separated in the front-rear direction and substantially parallel to each other, and the frame portion 54 and the frame portion 56. A plate-like portion 58 provided to be connected is included. Each of the frame portion 54, the frame portion 56, and the plate-like portion 58 has a substantially rectangular shape in a side view. With reference to FIG. 4, the plate-like portion 58 has a plurality of (six in this embodiment) through holes 58 a arranged side by side in the vertical direction.

  With reference to FIGS. 4 and 5, the frame portion 54 and the frame portion 56 protrude to the left of the plate-like portion 58. 4 to 6, the third case portion 18 is further provided along the outer peripheral edge thereof, and the frame portion 54, the frame portion 56 (see FIGS. 4 and 6), and the plate-like portion 58 (FIG. 4). And a protrusion 60 that protrudes to the right from (see FIG. 5).

  With reference to FIGS. 4 and 5, in the third case portion 18, a substantially rectangular parallelepiped through hole 54 a penetrating in the left-right direction is formed by the frame portion 54, and a substantially rectangular parallelepiped shape penetrating in the left-right direction by the frame portion 56. Through-holes 56a are formed.

  Referring to FIG. 5, groove 54 b is formed along the left edge of frame portion 54, and groove 56 b is formed along the left edge of frame portion 56. The groove part 54b and the groove part 56b are opened toward the left direction. In FIG. 4, the groove portion 54 b and the groove portion 56 b are not shown in order to avoid the drawing from becoming complicated.

  4 and 5, the frame portion 46 of the second case portion 16 is inserted into the groove portion 54b (see FIG. 5) in a state where the annular waterproof seal 62 is fitted in the groove portion 54b (see FIG. 5). . Similarly, the frame portion 48 of the second case portion 16 is inserted into the groove portion 56b (see FIG. 5) with the annular waterproof seal 64 fitted in the groove portion 56b (see FIG. 5). Thereby, the frame part 46 and the frame part 54 are connected, and the frame part 48 and the frame part 56 are connected. That is, the second case portion 16 and the third case portion 18 are connected. The second case portion 16 and the third case portion 18 are further fixed to each other by a plurality of fasteners (not shown) such as screws. The waterproof seal 62 and the waterproof seal 64 prevent water outside the case 12 from entering the case 12 through the space between the second case portion 16 and the third case portion 18.

  With reference to FIG. 1 and FIGS. 4-6, the 4th case part 20 contains the thermal radiation part 68 (refer FIGS. 4-6) which protrudes from the support part 66 and the support part 66 rightward. Referring to FIG. 4, the support portion 66 includes a frame portion 70 so that a substantially rectangular parallelepiped opening 70 a is formed. Referring to FIG. 1, a service plug 148 described later is detachably provided on the front surface of frame portion 70.

  Referring to FIGS. 4 and 6, support portion 66 further includes a side wall portion 72 (see FIG. 6) provided on the right side of the upper end portion of frame portion 70, and a side wall portion provided on the right side of the lower end portion of frame portion 70. 74.

  With reference to FIG. 6, side wall 72 and side wall 74 are provided substantially perpendicular to frame 70. The length of the side wall portion 72 in the front-rear direction is substantially equal to the length of the side wall portion 36 of the first case portion 14 in the front-rear direction, and the length of the side wall portion 74 in the front-rear direction is the length of the side wall portion 38 of the first case portion 14. It is approximately equal to the length in the front-rear direction.

  4 and 6, the side wall portion 72 (see FIG. 6) has a pair of bosses 72 a extending in the left direction, like the side wall portion 36 of the first case portion 14. Each boss 72a has a hollow substantially cylindrical shape. One boss 72a is provided at the front end of the side wall 72 (see FIG. 6) so as to face the boss 36a provided at the front end of the side wall 36 in the left-right direction. The other boss 72a is provided at the rear end portion of the side wall portion 72 (see FIG. 6) so as to face the boss 36a provided at the rear end portion of the side wall portion 36 in the left-right direction.

  The side wall portion 74 has a pair of bosses 74a extending in the left direction, similarly to the side wall portion 38 of the first case portion 14. Each boss 74a has a hollow substantially cylindrical shape. One boss 74 a is provided at the front end of the side wall 74 so as to face the boss 38 a provided at the front end of the side wall 38 in the left-right direction. The other boss 74a is provided at the rear end portion of the side wall portion 74 so as to face the boss 38a provided at the rear end portion of the side wall portion 38 in the left-right direction.

  Referring to FIG. 5, support portion 66 further includes a side wall portion 76 extending in the vertical direction so as to connect the front end portion of side wall portion 72 (see FIG. 6) and the front end portion of side wall portion 74 (see FIG. 6). Including. The front end portion of the side wall portion 76 is connected to the frame portion 70. The side wall portion 76 has two through holes (not shown) for projecting a plus terminal 124 and a minus terminal 144 described later from the inside of the case 12 to the outside of the case 12. Referring to FIG. 1, the side wall portion 76 (see FIG. 5) is provided with a protection portion 76 a for protecting the plus terminal 124 and a protection portion 76 b for protecting the minus terminal 144. The protective part 76a is provided integrally with the side wall part 76 so as to surround the outer peripheral surface of the plus terminal 124, and the protective part 76b is provided integrally with the side wall part 76 so as to surround the outer peripheral surface of the negative terminal 144.

  Referring to FIGS. 5 and 6, heat radiating portion 68 extends rightward from the upper end portion of plate-like upper wall portion 78 a (see FIG. 6) extending from the lower end portion of side wall portion 72 to the right direction and from the upper end portion of side wall portion 74. The side wall portion 76 (see FIG. 5) connects the plate-like lower wall portion 78b (see FIG. 6), the front end portion of the upper wall portion 78a (see FIG. 6) and the front end portion of the lower wall portion 78b (see FIG. 6). A front wall portion 78c (see FIG. 5) extending rightward from the rear end portion, and a rear end portion of the upper wall portion 78a (see FIG. 6) and a rear end portion of the lower wall portion 78b (see FIG. 6). A rear wall portion 78d (see FIG. 5) extending rightward from the frame portion 70 is included. 4, 5, and 6, the heat radiating portion 68 further includes an upper wall portion 78 a (see FIG. 6), a lower wall portion 78 b (see FIG. 6), a front wall portion 78 c (see FIG. 5), and a rear portion. It includes a plate-like side wall portion 80 provided continuously at the right end of the wall portion 78d (see FIG. 5). Referring to FIG. 4, the side wall 80 has a plurality of (seven in this embodiment) through-holes 80 a arranged side by side in the vertical direction.

  With reference to FIGS. 5 and 6, a groove portion 70 b is formed along the left edge of the frame portion 70. The groove part 70b is opened toward the left direction. In FIG. 4, the groove 70b is not shown in order to avoid the drawing from becoming complicated.

  4 to 6, with the annular waterproof seal 82 fitted in the groove 70b (see FIGS. 5 and 6), the protrusion 60 of the third case portion 18 is in the groove 70b (see FIGS. 5 and 6). 6). Thereby, the 3rd case part 18 and the 4th case part 20 are connected. The third case portion 18 and the fourth case portion 20 are further fixed to each other by a plurality of fasteners (not shown) such as screws. The waterproof seal 82 prevents water outside the case 12 from entering the case 12 through between the third case portion 18 and the fourth case portion 20.

  With reference to FIGS. 1 and 5, in case 12 combined as described above, the second case portion 16 and the third case portion 18 radiate heat in a substantially central portion of case 12 in the vertical direction. A space 84 is formed. In this embodiment, the heat dissipation space 84 is formed as a through hole. Referring to FIG. 5, in this embodiment, the first housing portion X <b> 1 is configured by the first case portion 14, the frame portion 44 of the second case portion 16, and the plate-like portion 50 of the second case portion 16. The plate-like portion 58 of the third case portion 18, the protruding portion 60 of the third case portion 18, and the fourth case portion 20 constitute the second housing portion X 2, and the frame portion 46 of the second case portion 16, the second case The frame portion 48 of the portion 16, the frame portion 54 of the third case portion 18, and the frame portion 56 of the third case portion 18 constitute a connecting portion X <b> 3. The first housing part X1 has a first housing space 86 for housing the first battery unit 24, and the second housing part X2 has a second housing space 88 for housing the second battery unit 26. . The 1st accommodation space 86 and the 2nd accommodation space 88 are connected via penetration hole 46a, 48a, 54a, and 56a of connecting part X3.

Next, the battery unit 22 housed in the case 12 will be described in detail.
FIG. 7 is an exploded perspective view showing the first battery unit 24 of the battery unit 22 (see FIGS. 2 and 3). FIG. 8 is an illustrative side view of the inside of the battery pack 10 as viewed from the left side. In FIG. 8, in order to facilitate understanding of the internal structure of the battery pack 10, the first case portion 14 (see FIG. 4), the second case portion 16 (see FIG. 4), and the waterproof seal 52 (see FIG. 4). ), The waterproof seal 62 (see FIG. 4) and the waterproof seal 64 (see FIG. 4) are not shown.

  7 and 8, the first battery unit 24 includes a plurality of rechargeable batteries 90, a battery holder 92, a battery holder 94 (see FIG. 7), and a controller 96 that are arranged in parallel to each other.

  The battery 90 has an end electrode 90a as a positive electrode and an end electrode 90b as a negative electrode. The battery 90 has a substantially cylindrical shape, and the length of the battery 90 in the longitudinal direction is longer than the diameter of the battery 90. The plurality of batteries 90 are arranged in multiple rows and multiple stages so that the end electrodes 90a and the end electrodes 90b are located on the same plane. In this embodiment, the batteries 90 are arranged in six rows in the front and rear and 14 steps in the upper and lower sides. The batteries 90 in the upper and lower adjacent stages are arranged so that the batteries 90 adjacent to each other are positioned in the middle by being shifted back and forth. Also, the batteries 90 in the upper and lower adjacent stages are arranged in the opposite direction to the adjacent batteries 90, and the batteries 90 in the adjacent rows in the front and rear are arranged in the same direction as the adjacent batteries 90. Specifically, in the first, third, fifth, seventh, ninth, eleventh, and thirteenth batteries 90 from the top, the end electrode 90a (positive electrode) is on the left side. The batteries 90 in the second, fourth, sixth, eighth, tenth, twelfth and fourteenth stages from the top are arranged with the end electrode 90b (minus electrode) on the left side. It is arranged so that it faces.

  The battery holder 92 includes a substantially rectangular plate-like portion 92a, a holder portion 92b protruding leftward from the plate-like portion 92a, a plurality of (two in this embodiment) bosses 92c extending forward from the holder portion 92b, and a holder portion It includes a plurality (seven in this embodiment) of bosses 92d (see FIG. 7) extending rearward from 92b. The plurality of bosses 92d are provided corresponding to a plurality of lead plates 100 described later.

  Referring to FIG. 7, battery holder 92 has a plurality of through holes 92e that penetrate plate-like portion 92a and holder portion 92b in the left-right direction. The plurality of through holes 92 e are formed corresponding to the plurality of batteries 90. At the four corners of the plate-like portion 92a, substantially cylindrical bosses 92f (only three bosses 92f are shown in FIG. 7) are provided so as to extend in the left-right direction. A plurality (seven in this embodiment) of screw holes 92g are formed on the left end surface of the holder portion 92b so as to be aligned in the vertical direction.

  The battery holder 94 includes a rectangular plate-like portion 94a, a holder portion 94b protruding rightward from the plate-like portion 94a, a plurality of (two in this embodiment) bosses 94c extending forward from the holder portion 94b, and a holder portion 94b. A plurality of (eight in this embodiment) bosses 94d (only one boss 94d is shown in FIG. 7). Referring to FIG. 8, a plurality of bosses 94d (six bosses 94d are shown in FIG. 8) correspond to a lead plate 102a (see FIG. 7), a plurality of lead plates 102b and a lead plate 102c described later. Provided.

  Referring to FIG. 7, battery holder 94 has a plurality of through holes 94e that penetrate plate-like portion 94a and holder portion 94b in the left-right direction. The plurality of through holes 94 e are formed corresponding to the plurality of batteries 90. A plurality of screw holes (not shown) similar to the screw holes 92g of the holder portion 92b are formed on the right end surface of the holder portion 94b.

  Referring to FIGS. 2, 3 and 7, battery holder 92 and battery holder 94 are combined so that battery 90 is accommodated in through hole 92e (see FIG. 7) and through hole 94e (see FIG. 7). It is. The battery holder 92 and the battery holder 94 are combined by, for example, fixing the plate-like portion 92a and the plate-like portion 94a (see FIGS. 3 and 7) with a plurality of fasteners (for example, screws) (not shown).

  The control unit 96 includes a rectangular circuit board 96a, a CPU (not shown) and a memory (not shown) mounted on the circuit board 96a. The control unit 96 monitors the state of the battery 90 by detecting the temperature, current, voltage, usage frequency, and the like of the battery 90 and controls the battery 90. As the control unit 96, for example, a BMC (Battery Management Controller) can be used.

  2, 7, and 8, the circuit board 96 a includes a plurality of (four in this embodiment) screws 98 (see FIGS. 2 and 8) and the boss 92 c of the battery holder 92 and the battery holder 94 ( 7) (see FIG. 7). As a result, the control unit 96 is fixed to the battery holder 92 and the battery holder 94.

  A plurality of (7 in this embodiment) lead plates 100 for connection are connected to the left end portions of the plurality of batteries 90. Specifically, one lead plate 100 is connected to the end electrode 90a (plus electrode) of the plurality of batteries 90 in the first stage from the top and the end electrode 90b (minus electrode) of the plurality of batteries 90 in the second stage. Is done. Thereby, the end electrodes 90a of the plurality of batteries 90 in the first stage are electrically connected in parallel, and the end electrodes 90b of the plurality of batteries 90 in the second stage are electrically connected in parallel. In addition, the end electrodes 90a of the plurality of first-stage batteries 90 and the end electrodes 90b of the plurality of second-stage batteries 90 are electrically connected in series. Lead plate 100 is welded to end electrode 90a and end electrode 90b, for example. Similarly, six lead plates 100 are connected to a plurality of batteries 90 in the third to the 14th stages. Specifically, one lead plate 100 is connected for each of the plurality of batteries 90 in two stages. The front end and the rear end of each lead plate 100 are bent in the right direction. A through hole 100a is formed at the center in the front-rear direction of each lead plate 100, and a through hole 100b (see FIG. 7) is formed at the rear end of each lead plate 100. Referring to FIGS. 2 and 8, the front end portion of each lead plate 100 is connected to a circuit board 96 a of control unit 96.

  Referring to FIG. 7, an output lead plate 102a, a plurality of connection lead plates (six in this embodiment) 102b, and an output lead plate 102c are connected to the right ends of the plurality of batteries 90. Is done.

  Specifically, the lead plate 102a is connected to the end electrodes 90b of the plurality of batteries 90 in the first stage from the top. Thereby, the end electrodes 90b of the plurality of batteries 90 in the first stage are electrically connected in parallel. The lead plate 102a is welded to, for example, the end electrode 90b. The front end portion and the rear end portion of the lead plate 102a are bent leftward. A through hole 102d is formed at the rear end of the lead plate 102a. Referring to FIG. 2, the front end portion of lead plate 102 a is connected to circuit board 96 a of control unit 96.

  Referring to FIG. 7, one lead plate 102 b is connected to end electrodes 90 a of the plurality of batteries 90 in the second stage from the top and end electrodes 90 b of the plurality of batteries 90 in the third stage from the top. Thereby, the end electrodes 90a of the plurality of batteries 90 in the second stage are electrically connected in parallel, and the end electrodes 90b of the plurality of batteries 90 in the third stage are electrically connected in parallel. In addition, the end electrodes 90a of the plurality of second-stage batteries 90 and the end electrodes 90b of the plurality of third-stage batteries 90 are electrically connected in series. Lead plate 102b is welded to, for example, end electrode 90a and end electrode 90b. Similarly, five lead plates 102b are connected to a plurality of batteries 90 in the fourth to thirteenth stages. Specifically, one lead plate 102b is connected to each of the plurality of batteries 90 in two stages. The front end portion and the rear end portion of each lead plate 102b are bent leftward. A through hole 102e is formed at the center in the front-rear direction of each lead plate 102b, and a through hole 102f is formed at the rear end of each lead plate 102b. Referring to FIG. 2, the front end portion of each lead plate 102 b is connected to circuit board 96 a of control unit 96.

  Referring to FIG. 7, lead plate 102c is connected to end electrodes 90a of a plurality of batteries 90 in the 14th stage from the top. Thereby, the end electrodes 90a of the plurality of batteries 90 in the 14th stage are electrically connected in parallel. The lead plate 102c is welded to, for example, the end electrode 90a. The front end portion and the rear end portion of the lead plate 102c are bent leftward. A through hole 102g is formed at the rear end of the lead plate 102c. Referring to FIG. 2, the front end portion of lead plate 102 c is connected to circuit board 96 a of control unit 96.

  In the first battery unit 24, the plurality of batteries 90 from the first stage to the 14th stage are connected as described above, whereby the plurality of batteries 90 at each stage are electrically connected in parallel and 1 A plurality of batteries 90 from the 14th stage to the 14th stage are electrically connected in series.

Next, the second battery unit 26 will be described.
FIG. 9 is an exploded perspective view showing the second battery unit 26. Referring to FIG. 9, second battery unit 26 includes a plurality of batteries 90, battery holder 104, and battery holder 106 that are arranged in parallel to each other. Similar to the first battery unit 24, the plurality of batteries 90 are arranged in multiple rows and multiple stages so that the end electrodes 90a and the end electrodes 90b are located on the same plane. In this embodiment, the batteries 90 are arranged in six rows in the front and rear and 14 steps in the upper and lower sides. The batteries 90 in the upper and lower adjacent stages are arranged so that the batteries 90 adjacent to each other are positioned in the middle by being shifted back and forth. Also, the batteries 90 in the upper and lower adjacent stages are arranged in the opposite direction to the adjacent batteries 90, and the batteries 90 in the adjacent rows in the front and rear are arranged in the same direction as the adjacent batteries 90. In the second battery unit 26, the batteries 90 in the first, third, fifth, seventh, ninth, eleventh and thirteenth stages from the top are the end electrodes 90b (minus electrode). Are arranged so as to face the left side, and the second, fourth, sixth, eighth, tenth, twelfth and fourteenth tier batteries 90 from the top are end electrodes 90a (plus electrodes) ) Are lined up facing left. Therefore, in the battery unit 22 (see FIG. 2), the battery 90 (see FIG. 7) of the first battery unit 24 (see FIG. 7) and the battery 90 (see FIG. 9) of the second battery unit 26 (see FIG. 9). Are arranged in opposite directions. In other words, the end electrode 90a of the battery 90 of the first battery unit 24 and the end electrode 90a of the battery 90 of the second battery unit 26 face each other, and the end electrode 90b of the battery 90 of the first battery unit 24 and the The plurality of batteries 90 are arranged so that the end electrodes 90b of the batteries 90 of the two battery units 26 face each other.

  The battery holder 104 includes a substantially rectangular plate-like portion 104a, a holder portion 104b protruding leftward from the plate-like portion 104a, a boss 104c extending forward from the upper end portion of the holder portion 104b, and extending forward from a lower end portion of the holder portion 104b. The boss 104d includes a plurality of (eight in this embodiment) bosses 104e (only one boss 104e is shown in FIG. 9) extending rearward from the holder portion 104b. The plurality of bosses 104e are provided corresponding to a lead plate 108a, a plurality of lead plates 108b, and a lead plate 108c, which will be described later.

  The battery holder 104 has a plurality of through holes 104f that penetrate the plate-like portion 104a and the holder portion 104b in the left-right direction. The plurality of through holes 104 f are formed corresponding to the plurality of batteries 90. At the four corners of the plate-like portion 104a, substantially cylindrical bosses 104g (only three bosses 104g are shown in FIG. 9) are provided so as to extend in the left-right direction. A plurality (six in this embodiment) of screw holes 104h are formed on the left end surface of the holder portion 104b so as to be aligned in the vertical direction.

  A mounting portion 104i is provided at the front end portion of the plate-like portion 104a slightly below the central portion in the vertical direction so as to protrude forward, and at the front end portion of the plate-like portion 104a above the attachment portion 104i. Is provided with a mounting portion 104j so as to protrude forward.

  At the front end portion of the plate-like portion 104a, attachment portions 104k and 104l are provided so as to protrude forward from the attachment portion 104i, and at the front end portion of the plate-like portion 104a above the attachment portion 104j. Terminal mounting portions 104m and 104n are provided.

  3 and 9, the battery holder 106 includes a rectangular plate-like portion 106a, a holder portion 106b protruding rightward from the plate-like portion 106a, and a plurality of (in this embodiment) extending backward from the holder portion 106b. 7) bosses 106c (only one boss 106c is shown in FIG. 9). The plurality of bosses 106c are provided corresponding to a plurality of lead plates 110 described later.

  Referring to FIG. 9, battery holder 106 has a plurality of through holes 106d that penetrate plate-like portion 106a and holder portion 106b in the left-right direction. The plurality of through holes 106 d are formed corresponding to the plurality of batteries 90. A screw hole (not shown) similar to the screw hole 104h of the holder part 104b is formed on the right end surface of the holder part 106b.

  Referring to FIGS. 2, 3 and 9, battery holder 104 and battery holder 106 are combined so that battery 90 is accommodated in through hole 104f (see FIG. 9) and through hole 106d (see FIG. 9). It is. The battery holder 104 and the battery holder 106 are combined by, for example, fixing the plate-like portion 104a and the plate-like portion 106a (see FIGS. 3 and 9) with a plurality of fasteners (for example, screws) (not shown).

  Referring to FIG. 9, an output lead plate 108 a, a plurality (6 in this embodiment) of lead plates 108 b, and an output lead plate 108 c are connected to the left ends of the plurality of batteries 90. Is done.

  Specifically, the lead plate 108a is connected to the end electrodes 90b (minus electrodes) of the plurality of batteries 90 in the first stage from the top. Thereby, the end electrodes 90b of the plurality of batteries 90 in the first stage are electrically connected in parallel. Lead plate 108a is welded to, for example, end electrode 90b. The front end portion and the rear end portion of the lead plate 108a are bent rightward. A through hole 108d is formed at the front end of the lead plate 108a, and a through hole 108e is formed at the rear end of the lead plate 108a.

  One lead plate 108b is connected to the end electrode 90a (plus electrode) of the plurality of batteries 90 in the second stage from the top and the end electrode 90b of the plurality of batteries 90 in the third stage from the top. Thereby, the end electrodes 90a of the plurality of batteries 90 in the second stage are electrically connected in parallel, and the end electrodes 90b of the plurality of batteries 90 in the third stage are electrically connected in parallel. In addition, the end electrodes 90a of the plurality of second-stage batteries 90 and the end electrodes 90b of the plurality of third-stage batteries 90 are electrically connected in series. Lead plate 108b is welded to, for example, end electrode 90a and end electrode 90b. Similarly, five lead plates 108b are connected to the plurality of batteries 90 in the fourth to thirteenth stages. Specifically, one lead plate 108b is connected to each of the plurality of batteries 90 in two stages. The rear end portion of each lead plate 108b is bent in the right direction. A through hole 108f is formed at the center in the front-rear direction of each lead plate 108b, and a through hole 108g is formed at the rear end of the lead plate 108b.

  A lead plate 108c is connected to the end electrodes 90a of the plurality of batteries 90 in the 14th stage from the top. Thereby, the end electrodes 90a of the plurality of batteries 90 in the 14th stage are electrically connected in parallel. The lead plate 108c is welded to, for example, the end electrode 90a. The front end portion of the lead plate 108c is bent in a bowl shape toward the right, and the tip end portion extends upward. The rear end portion of the lead plate 108c is bent in the right direction. A through hole 108h and a through hole 108i are formed at the front end portion of the lead plate 108c, and a through hole 108j is formed at the rear end portion of the lead plate 108c.

  A plurality (seven in this embodiment) of lead plates 110 for connection are connected to the right end portions of the plurality of batteries 90. Specifically, one lead plate 110 is connected to the end electrodes 90a of the plurality of batteries 90 in the first stage from the top and the end electrodes 90b of the plurality of batteries 90 in the second stage. Thereby, the end electrodes 90a of the plurality of batteries 90 in the first stage are electrically connected in parallel, and the end electrodes 90b of the plurality of batteries 90 in the second stage are electrically connected in parallel. In addition, the end electrodes 90a of the plurality of first-stage batteries 90 and the end electrodes 90b of the plurality of second-stage batteries 90 are electrically connected in series. Lead plate 110 is welded to, for example, end electrode 90a and end electrode 90b. Similarly, six lead plates 110 are connected to a plurality of batteries 90 in the third to the 14th stages. Specifically, one lead plate 110 is connected for each of the plurality of batteries 90 in two stages. The rear end portion of each lead plate 110 is bent leftward. A through hole 110 a is formed at the center in the front-rear direction of each lead plate 110, and a through hole 110 b is formed at the rear end of each lead plate 110.

  Also in the second battery unit 26, as in the first battery unit 24, the plurality of batteries 90 in the first stage to the 14th stage are connected as described above, whereby the plurality of batteries 90 in each stage are electrically connected. Are connected in parallel, and a plurality of batteries 90 from the first stage to the fourteenth stage are electrically connected in series.

  Referring to FIGS. 2 and 6, a substantially L-shaped lead plate 112 is provided in plan view so as to connect the front end portion of lead plate 102 c and the front end portion of lead plate 108 c. The left end portion of the lead plate 112 is welded to, for example, the front end portion of the lead plate 102c. Referring to FIG. 5, the lead plate 112 passes from the first housing space 86 of the first housing portion X1 to the second housing space 88 of the second housing portion X2 while passing through the through hole 46a and the through hole 54a of the connecting portion X3. It extends. 2 and 6, the right end portion of lead plate 112 is fixed to boss 104d of battery holder 104 by screw 114 together with the front end portion of lead plate 108c. As a result, as shown in FIG. 10, the end electrodes 90a (see FIG. 7) of the plurality of batteries 90 at the 14th stage (lowermost stage) of the first battery unit 24 and the 14th stage (uppermost stage) of the second battery unit 26 are shown. The end electrodes 90a (see FIG. 9) of the plurality of batteries 90 in the lower stage are connected by the lead plate 112.

  2 and 6, the right end portion of lead plate 108c is attached to attachment portion 104l (see FIG. 6) of battery holder 104 by screw 118 together with one terminal 116a of fuse 116. The other terminal 116 b of the fuse 116 is attached to the attachment portion 104 k (see FIG. 6) of the battery holder 104 by the screw 122 together with the lower end portion of the lead plate 120. The lead plate 120 has a shape bent in a step shape when viewed from the front.

  The upper end portion of the lead plate 120 is attached to the attachment portion 104i of the battery holder 104 by a screw 126 together with the positive terminal 124 for discharging. Thus, referring to FIG. 10, the plurality of batteries 90 of first battery unit 24 and the plurality of batteries 90 of second battery unit 26 are electrically connected to positive terminal 124 via fuse 116. Referring to FIG. 5, the plus terminal 124 is provided so as to extend rightward from the attachment portion 104 i (see FIG. 6), and protrudes from the side wall portion 76 of the case 12 to the outside of the case 12. As described above, the portion of the plus terminal 124 that protrudes outward from the case 12 is protected by the protection portion 76a (see FIG. 1).

  Referring to FIGS. 2 and 6, a substantially L-shaped lead plate 128 is provided in plan view so as to connect the front end portion of lead plate 102 a and the front end portion of lead plate 108 a. The left end portion of the lead plate 128 is welded to, for example, the front end portion of the lead plate 102a. Referring to FIG. 5, the lead plate 128 passes from the first housing space 86 of the first housing portion X1 to the second housing space 88 of the second housing portion X2 while passing through the through hole 46a and the through hole 54a of the connecting portion X3. It extends. 2 and 6, the right end of the lead plate 128 is connected to the battery holder 104 by a screw 132 together with the front end of the lead plate 108 a and the rear end of the substantially L-shaped lead plate 130 (side view). It is fixed to the boss 104c (see FIG. 9). As a result, as shown in FIG. 10, the end electrodes 90b (see FIG. 7) of the plurality of batteries 90 in the first stage (uppermost stage) of the first battery unit 24 and the first stage (uppermost stage) of the second battery unit 26 are obtained. The end electrodes 90b (see FIG. 9) of the plurality of batteries 90 in the upper stage are connected by the lead plate 128. As a result, the lead plate 112 and the lead plate 128 electrically connect the plurality of batteries 90 of the first battery unit 24 and the plurality of batteries 90 of the second battery unit 26 in parallel.

  2 and 6, the front end portion of lead plate 130 is bent so as to extend downward, and is attached to attachment portion 104n of battery holder 104 with screws 136 together with plate-like terminals 134. A plate-like terminal 138 is attached to the attachment portion 104 m of the battery holder 104 with a screw 142 together with the upper end portion of the lead plate 140 so as to face the terminal 134 in the vertical direction. The lead plate 140 has a shape bent in a step shape when viewed from the front.

  The lower end portion of the lead plate 140 is attached to the attachment portion 104j of the battery holder 104 by a screw 146 together with the negative terminal 144 for charging and discharging. Similar to the plus terminal 124 (see FIG. 5), the minus terminal 144 is provided so as to extend rightward from the mounting portion 104j (see FIG. 6), and the side wall portion 76 (see FIG. 5) of the case 12 (see FIG. 5). To the outside of the case 12 (see FIG. 5). As described above, the portion of the negative terminal 144 that protrudes outward from the case 12 is protected by the protection portion 76b (see FIG. 1).

  Referring to FIG. 1, service plug 148 is attached to frame portion 70 of fourth case portion 20. The service plug 148 has a connection terminal (not shown) protruding from the frame portion 70 into the case 12, and the terminal 134 (see FIG. 6) and the terminal 138 (see FIG. 6) are connected by the connection terminal. . Thus, referring to FIG. 10, the plurality of batteries 90 of first battery unit 24 and the plurality of batteries 90 of second battery unit 26 are electrically connected to minus terminal 144 via service plug 148. As described above, the service plug 148 is detachably provided on the frame portion 70. Therefore, by removing the service plug 148 from the frame portion 70, the electrical connection between the terminal 134 (see FIG. 6) and the terminal 138 (see FIG. 6) can be cut off. Thereby, the electrical connection between the plus terminal 124 and the minus terminal 144 can be interrupted.

  Referring to FIG. 3, a connection unit 28 is provided so as to connect the rear end portion of the first battery unit 24 and the rear end portion of the second battery unit 26. Referring to FIG. 5, connecting unit 28 is arranged to pass through through hole 48a and through hole 56a of connecting part X3.

  FIG. 11 is a rear view showing the connection unit 28, and FIG. 12 is a cross-sectional view showing the connection unit 28. 12A is a cross-sectional view taken along the line BB in FIG. 11, and FIG. 12B is a cross-sectional view taken along the line CC in FIG.

  Referring to FIG. 11, the connection unit 28 includes a rectangular substrate 150, a lead plate 152 provided on the back surface of the substrate 150, and a plurality (six in this embodiment) of rectangular lead plates 154 provided on the back surface of the substrate 150. And a plurality (eight in this embodiment) of rectangular lead plates 156 provided on the front surface of the substrate 150. The substrate 150 is formed of an insulating material such as a resin. The central portion of the lead plate 152 in the left-right direction is bent so as to protrude upward.

  Referring to FIGS. 11 and 12A, the substrate 150 has a plurality (14 in this embodiment) of cylindrical protrusions 150a protruding rearward. The plurality of projecting portions 150 a are formed so as to be aligned in the vertical direction along the right end portion and the left end portion of the substrate 150. The lead plate 152 has four through holes 152a. The protrusion 150a is fitted into the two through holes 152a inside the four through holes 152a. As a result, the lead plate 152 is attached to the substrate 150. The lead plate 152 is welded to the substrate 150, for example.

  Referring to FIG. 11, each lead plate 154 has four through holes 154 a similarly to the lead plate 152. The protrusion 150a is fitted into the two through holes 154a inside the four through holes 154a. As a result, each lead plate 154 is attached to the substrate 150. The lead plate 154 is welded to the substrate 150, for example.

  In the substrate 150, a plurality (32 in this embodiment) of through holes 150b are formed inside the protrusion 150a. The plurality of through-holes 150b are arranged in four rows on the left and right and eight on the top and bottom. Referring to FIG. 12B, each lead plate 156 has four through holes 156a. The plurality of lead plates 156 are arranged side by side in the vertical direction so that the two through holes 156a inside each lead plate 156 communicate with the two rows of through holes 150b inside the substrate 150, respectively.

  2, 3 and 6, two through holes 156 a (see FIG. 12) inside lead plate 156 (see FIGS. 2 and 6) from the front of each lead plate 156 (see FIGS. 2 and 6). Screws 158 are inserted into two rows of through holes 150b (see FIGS. 11 and 12B) inside the substrate 150. As a result, the plurality of lead plates 156 are fixed to the substrate 150.

  Referring to FIG. 3, connection unit 28 is fixed to first battery unit 24 by a plurality of screws 160 and is fixed to second battery unit 26 by a plurality of screws 162. Specifically, from the rear side of the substrate 150, the leftmost through hole 150b (see FIG. 11) of the substrate 150 and the leftmost through hole 156a (see FIG. 12B) of the lead plate 156 (see FIG. 11). ) Is inserted into the screw 160.

  Referring to FIG. 8, the plurality of screws 160 further includes a through hole 102 d (see FIG. 7) in the lead plate 102 a (see FIG. 7), a through hole 102 f (see FIG. 7) in the plurality of lead plates 102 b, and a lead plate. 102c is inserted into the through hole 102g (see FIG. 7). And the front-end | tip part of each screw 160 is fixed to the boss | hub 94d of the battery holder 94. FIG. Accordingly, the connecting unit 28 is attached to the battery holder 94 of the first battery unit 24 together with the rear end portion of the lead plate 102a (see FIG. 7), the rear end portions of the plurality of lead plates 102b, and the rear end portion of the lead plate 102c. Fixed. 6 and 8, the rear end portion of lead plate 102a (see FIG. 6), the rear end portions of the plurality of lead plates 102b, and the rear end portion of lead plate 102c are connected to lead plate 156, respectively. The

  Referring to FIG. 3, from the rear of substrate 150, through hole 150b (see FIG. 11) in the rightmost row of substrate 150 and rightmost through hole 156a (see FIG. 12 (b) in lead plate 156 (see FIG. 11)). ))), The screw 162 is inserted. 2, the plurality of screws 162 (see FIG. 3) further includes a through hole 108e (see FIG. 9) in the lead plate 108, a through hole 108g (see FIG. 9) in the plurality of lead plates 108b, and a lead plate. 108c is inserted into the through hole 108j (see FIG. 9). 2 and 9, the tip of each screw 162 (see FIG. 3) is fixed to the boss 104e of the battery holder 104. Thereby, the connecting unit 28 is fixed to the battery holder 104 of the second battery unit 26 together with the rear end portion of the lead plate 108a, the rear end portions of the plurality of lead plates 108b, and the rear end portion of the lead plate 108c. Further, the rear end portion of the lead plate 108a, the rear end portions of the plurality of lead plates 108b, and the rear end portion of the lead plate 108c are connected to the lead plate 156, respectively.

  Referring to FIG. 3, the left end portion of lead plate 152 and the left end portion of lead plates 154 are fixed to boss 92 d of battery holder 92 by screws 164 together with the rear end portions of lead plates 100. Specifically, a screw 164 is inserted into the through hole 152a (see FIG. 11) at the left end of the lead plate 152 and the through hole 100b (see FIG. 7) of the lead plate 100, and the tip of the screw 164 is fixed to the boss 92d. Is done. Similarly, a screw 164 is inserted into the through hole 154a (see FIG. 11) at the left end of the lead plate 154 and the through hole 100b (see FIG. 7) of the lead plate 100, and the tip of the screw 164 is fixed to the boss 92d. . As a result, the plurality of lead plates 100 are connected to the lead plate 152 and the plurality of lead plates 154.

  Similarly, the right end portion of the lead plate 152 and the right end portion of the plurality of lead plates 154 are fixed to the boss 106 c of the battery holder 106 together with the rear end portions of the plurality of lead plates 110 by screws 166. Specifically, a screw 166 is inserted into the through hole 152a (see FIG. 11) at the right end of the lead plate 152 and the through hole 110b (see FIG. 9) of the lead plate 110, and the tip of the screw 166 is fixed to the boss 106c. Is done. Similarly, a screw 166 is inserted into the through hole 154a (see FIG. 11) at the right end of the lead plate 154 and the through hole 110b (see FIG. 9) of the lead plate 110, and the tip of the screw 166 is fixed to the boss 106c. . As a result, the plurality of lead plates 110 are connected to the lead plate 152 and the plurality of lead plates 154.

  Referring to FIG. 2, as described above, in the battery unit 22, the lead plates 102 a of the first battery unit 24, the lead plates 102 b and the lead plates 102 c are provided by the plurality of lead plates 156 of the connection unit 28. The lead plate 108a, the plurality of lead plates 108b, and the lead plate 108c of the second battery unit 26 are connected to each other. Further, referring to FIG. 3, the lead plates 152 of the first battery unit 24 and the lead plates 110 of the second battery unit 26 are respectively formed by the lead plates 152 and the plurality of lead plates 154 of the connecting unit 28. Connected.

  As a result, referring to FIG. 10, a plurality of first-stage batteries 90 of first battery unit 24 and a plurality of first-stage batteries 90 of second battery unit 26 include lead plate 156 and lead plate 152. Are electrically connected in parallel. The plurality of second-stage batteries 90 of the first battery unit 24 and the plurality of second-stage batteries 90 of the second battery unit 26 are electrically connected in parallel by the lead plate 152 and the lead plate 156. . Further, the plurality of third-stage batteries 90 of the first battery unit 24 and the plurality of third-stage batteries 90 of the second battery unit 26 are electrically connected in parallel by the lead plate 156 and the lead plate 154. . Similarly, the plurality of batteries 90 in the fourth to fourteenth stages of the first battery unit 24 and the plurality of batteries 90 in the four to fourteenth stages of the second battery unit 26 include the lead plate 154 and the lead plate. 156 are electrically connected in parallel. Thus, in the battery pack 10, the first battery unit 24 and the second battery unit 26 are electrically connected by the lead plate 112, the lead plate 128, the lead plate 152, the plurality of lead plates 154, and the plurality of lead plates 156. The connection part X4 connected to is configured.

  With reference to FIG. 2, as described above, the plurality of lead plates 100, the lead plate 102 a, the plurality of lead plates 102 b, and the lead plate 102 c are connected to the circuit board 96 a of the control unit 96. Thus, referring to FIG. 10, control unit 96 can detect the voltage of battery 90 in each stage of first battery unit 24 and battery 90 in each stage of second battery unit 26.

  Although not shown in the drawings other than FIG. 10 in order to avoid the drawing from becoming complicated, the battery unit 22 includes information on the positive terminal 168 for charging and information on the battery 90 (temperature, current, voltage and use). Frequency and the like) and a RXD terminal 172 for receiving control information of the battery 90 from a device external to the battery pack 10. The plus terminal 168, the TXD terminal 170, and the RXD terminal 172 are electrically connected to the control unit 96, respectively.

  Referring to FIGS. 2, 3 and 6, four cylindrical collars 174 are provided so as to be supported by four bosses 92f of battery holder 92 and four bosses 104g of battery holder 104, respectively. . Referring to FIG. 5, two collars 174 on the front side (only one collar 174 is shown in FIG. 5) are arranged to pass through through hole 46a and through hole 54a of connecting portion X3. Two collars 174 on the rear side (only one collar 174 is shown in FIG. 5) are disposed so as to pass through the through hole 48a and the through hole 56a of the connecting portion X3.

  Referring to FIG. 6, the distal end portions (right end portions) of the pair of bosses 36a of the support portion 30 of the first case portion 14 and the distal end portions (right end portions) of the pair of bosses 38a are respectively fitted into the four bosses 92f. . Similarly, the front end portions (left end portions) of the pair of bosses 72a of the support portion 66 of the fourth case portion 20 and the front end portions (left end portions) of the pair of bosses 74a are fitted into the four bosses 104g, respectively. The left end portions of the upper two collars 174 pass through the boss 92f and are fitted into the boss 36a, and the right end portion passes through the boss 104g and are fitted into the boss 72a. Similarly, the left end portions of the two lower collars 174 penetrate the boss 92f and are fitted into the boss 38a, and the right end portion penetrates the boss 104g and are fitted into the boss 74a. In such a configuration, bolts 176 are inserted into the collars 174 from the right side of the fourth case portion 20, and nuts 178 are attached to the tip portions of the bolts 176. Thereby, the battery unit 22 is supported by the support part 30 and the support part 66.

  4 and 7, from the left side of the first case portion 14 (see FIG. 4), the through hole 42a (see FIG. 4) and the lead plate 100 (see FIG. 4) of the first case portion 14 (see FIG. 4). 7), a screw (not shown) is inserted into the through hole 100a (see FIG. 7), and the tip of the screw is fixed to the screw hole 92g (see FIG. 7) of the battery holder 92 (see FIG. 7). . Thereby, the 1st case part 14 (refer FIG. 4) and the 1st battery unit 24 are mutually fixed.

  From the right side of the second case portion 16 (see FIG. 4), the through hole 50a (see FIG. 4) of the second case portion 16 (see FIG. 4) and the through hole 102e (see FIG. 7) of the lead plate 102b (see FIG. 7). A screw (not shown) is inserted into the reference), and the tip of the screw is fixed in a screw hole (not shown) of the battery holder 94 (see FIG. 7). Thereby, the 2nd case part 16 (refer FIG. 4) and the 1st battery unit 24 are mutually fixed.

  4 and FIG. 9, from the left side of the third case portion 18 (see FIG. 4), the through hole 58a (see FIG. 4) and the lead plate 108b (see FIG. 4) of the third case portion 18 (see FIG. 4). 9), a screw (not shown) is inserted into the through hole 108f (see FIG. 9), and the tip of the screw is fixed in the screw hole 104h (see FIG. 9) of the battery holder 104 (see FIG. 9). . Thereby, the 3rd case part 18 (refer FIG. 4) and the 2nd battery unit 26 are mutually fixed.

  Further, from the right side of the fourth case portion 20 (see FIG. 4), the through hole 80a (see FIG. 4) of the fourth case portion 20 (see FIG. 4) and the through hole 110a (see FIG. 9) of the lead plate 110 (see FIG. 9). A screw (not shown) is inserted into the reference), and the tip of the screw is fixed in a screw hole (not shown) of the battery holder 106 (see FIG. 9). Thereby, the 4th case part 20 (refer to Drawing 4) and the 2nd battery unit 26 are mutually fixed.

  As described above, in the battery pack 10, the first case portion 14 and the second case portion 16 are fixed to the connection unit 28 by a plurality of screws, and the third case portion 18 and the fourth case portion 20 are fixed by the plurality of screws. 2 fixed to the battery unit 26.

Hereinafter, the function and effect of the battery pack 10 will be described.
In the battery pack 10, the first battery unit 24 is accommodated in the first accommodation space 86 of the case 12, the second battery unit 26 is accommodated in the second accommodation space 88, and the plurality of batteries 90 of the first battery unit 24 The plurality of batteries 90 of the two-battery unit 26 are electrically connected by the connection portion X4. Thus, since the battery pack 10 has the 1st battery unit 24 and the 2nd battery unit 26 electrically connected by the connection part X4, energy amount can be enlarged. Moreover, since the 1st battery unit 24 and the 2nd battery unit 26 are arrange | positioned on both sides of the space 84 for heat radiation, it can suppress that the planar space for arrange | positioning the some battery 90 becomes large. Further, the heat generated in the first battery unit 24 is released from the heat radiating portion 32 of the first case portion 14 to the outside of the case 12 and from the plate-like portion 50 of the second case portion 16 to the heat radiating space 84. Released. The heat generated in the second battery unit 26 is released from the heat radiating portion 68 of the fourth case portion 20 to the outside of the case 12 and from the plate-like portion 58 of the third case portion 18 to the heat radiating space 84. Released. That is, in the battery pack 10, the heat dissipation space 84 can be used as a space for releasing heat generated in the battery unit 22, so that the heat dissipation of the battery pack 10 can be increased.

  In the battery pack 10, the first housing portion X <b> 1 is formed by combining the first case portion 14 and the second case portion 16, and the connecting portion is combined by combining the second case portion 16 and the third case portion 18. X3 is formed, and the second housing portion X2 is formed by combining the third case portion 18 and the fourth case portion 20. Further, by combining the second case portion 16 and the third case portion 18, a heat radiation space 84 is formed between the second case portion 16 and the third case portion 18. In this way, the case 12 can be easily obtained.

  In the battery pack 10, a connection part X <b> 4 (see FIG. 10) that electrically connects the first battery unit 24 and the second battery unit 26 is accommodated in the case 12. Here, when a part of the connection part X4 for electrically connecting the first battery unit 24 and the second battery unit 26 is provided outside the case 12, the connection part X4 is provided outside the case 12. A guide part (for example, a hole penetrating the case) for guiding must be provided in the case 12. In this case, since the sealing performance of the case 12 is lowered in the guide portion, it is necessary to take measures (such as a waterproof seal) for improving the sealing performance of the case 12 in the guide portion. However, in the battery pack 10, since the connection part X4 is accommodated in the case 12, it is not necessary to provide a guide part for guiding the connection part X4 to the outside of the case 12. Therefore, the measures for improving the sealing performance as described above are not necessary, and the sealing performance of the case 12 can be easily increased.

  Referring to FIG. 8, when the first battery unit 24 is viewed from the side (for example, when viewed from the second housing portion X2 (see FIG. 5)), the frame portions 46 and 48 (see FIG. 1). ) And a part of the frame parts 54 and 56, that is, a part of the connecting part X <b> 3 (see FIG. 5) overlaps a part of the first battery unit 24. Similarly, with reference to FIG. 5, when the second battery unit 26 is viewed from the side (for example, when viewed from the first housing part X <b> 1), a part of the connecting part X <b> 3 is It overlaps with a part of. By forming the connecting portion X3 in this way, the length of the case 12 in the front-rear direction can be shortened. Thereby, the planar size of the case 12 can be reduced, and the battery pack 10 can be configured in a small size.

  In the battery pack 10, the connecting portion X3 plays a role of connecting the first housing portion X1 and the second housing portion X2 and also connects the connecting portion X4 (see FIG. 10) from the first housing portion X1 to the second housing. It plays a role of guiding to the part X2. Therefore, in the battery pack 10, it is not necessary to provide a configuration for guiding the connection portion X4 from the first housing portion X1 to the second housing portion X2 separately from the connection portion X3. As a result, the configuration of the battery pack 10 can be simplified.

  In the battery pack 10, the plurality of batteries 90 are arranged so that one end surface (the end electrode 90 a or the end electrode 90 b) of each battery 90 faces the heat dissipation space 84. Thereby, the heat generated by each battery 90 can be efficiently released to the heat dissipation space 84. In the battery pack 10, a substantially cylindrical battery 90 is used, and the length of the battery 90 in the axial direction is longer than the diameter of the battery 90. Therefore, by arranging a plurality of batteries 90 such that one end surface (end electrode 90a or end electrode 90b) of each battery 90 faces heat dissipation space 84, the outer peripheral surface of each battery 90 becomes heat dissipation space 84. Compared with the case where the plurality of batteries 90 are arranged so as to face, the planar space for arranging the plurality of batteries 90 can be reduced. As a result, a compact battery pack 10 with improved heat dissipation can be obtained.

  Further, in the battery pack 10, since the through-hole penetrating in the vertical direction is used as the heat dissipation space 84, heat can be efficiently released in the vertical direction through the heat dissipation space 84.

  Moreover, in the battery pack 10, since the some battery 90 of the 1st battery unit 24 and the some battery 90 of the 2nd battery unit 26 are electrically connected in parallel, the energy capacity of the battery pack 10 is fully enlarged. can do.

  Moreover, in the battery pack 10, since the 1st battery unit 24 and the 2nd battery unit 26 can be controlled by one control part 96, the control system of the battery pack 10 can be constructed | assembled with a simple structure.

  In the battery pack 10, the connection unit 28 is configured by unitizing the substrate 150, the lead plate 152, the plurality of lead plates 154, and the plurality of lead plates 156. The first battery unit 24 and the second battery unit 26 are electrically connected by being attached to the battery unit 26. In this case, the assemblability of the battery pack 10 can be improved as compared with the case where the lead plate 152, the plurality of lead plates 154, and the plurality of lead plates 156 are attached to the first battery unit 24 and the second battery unit 26 one by one.

  In the above-described embodiment, the first battery unit 24 and the second battery unit 26 are electrically connected by the connection portion X4 (see FIG. 10). However, the lead plate 152 and the plurality of leads of the connection portion X4 are used. The plate 154 and the plurality of lead plates 156 may not be provided. In this case, the lead plate 112 and the lead plate 128 constitute a connection portion that electrically connects the first battery unit 24 and the second battery unit 26. In the above-described embodiment, the first battery unit 24 and the second battery unit 26 are electrically connected in parallel. However, the first battery unit and the second battery unit are electrically connected in series. May be.

  FIG. 13 is a diagram showing a battery pack 10a in which a first battery unit and a second battery unit are electrically connected in series.

  Referring to FIG. 13, battery pack 10 a includes a casing-like case 180. Case 180 includes a first case portion 182, a second case portion 184, a third case portion 186, and a fourth case portion 188. Similar to case 12 of battery pack 10 described above, case 180 is formed of an insulating material such as resin, for example.

  FIG. 14 is a front perspective view showing the battery unit 22a housed in the case 12, and FIG. 15 is a rear perspective view showing the battery unit 22a. FIG. 16 is an exploded perspective view showing the battery pack 10a.

  Referring to FIGS. 14 to 16, battery unit 22a (see FIGS. 14 and 15) includes a first battery unit 24a and a second battery unit 26a. Referring to FIG. 16, the first battery unit 24 a is disposed between the first case part 182 and the second case part 184, and the second battery unit 26 a includes the third case part 186 and the fourth case part 188. Between.

  FIG. 17 is a front view illustrating the battery pack 10a, FIG. 18 is a plan view illustrating the battery pack 10a, and FIG. 19 is a bottom view illustrating the battery pack 10a. 18 and 19 show a cut surface of the case 180 when the case 180 is cut at the center in the vertical direction. FIG. 17 shows a cut surface of the case 180 when cut along the line DD in FIG. In FIGS. 17 to 19, the battery unit 22 a is shown in a simplified manner in order to avoid complicated drawings.

  Referring to FIGS. 13, 16, and 17, first case portion 182 includes a support portion 190 and a heat dissipation portion 192 that protrudes leftward from support portion 190. Referring to FIGS. 16 and 17, support portion 190 includes a frame portion 194 and side wall portions 196 and 198, similarly to first case portion 14 (see FIG. 1) of battery pack 10. Referring to FIG. 17, side wall portion 196 includes a pair of bosses 196 a (only one boss 196 a is shown in FIG. 17) extending in the right direction, and a plus terminal 284 described later from the inside of case 180 to the outside of case 180. A through hole (not shown) for projecting to the right. As with the pair of bosses 36a (see FIG. 1) of the battery pack 10, one boss 196a of the pair of bosses 196a is provided at the front end of the side wall 196, and the other boss 196a is Provided at the rear end.

  Referring to FIGS. 16 and 17, side wall 198 has a pair of bosses 198a extending in the right direction (only one boss 198a is shown in FIG. 17). One boss 198 a of the pair of bosses 198 a is provided at the front end of the side wall 198, and the other boss 198 a is provided at the rear end of the side wall 198.

  Referring to FIGS. 13 and 16, the second case portion 184 includes a frame portion 200 having a substantially rectangular shape in side view, a frame portion 202 having a substantially rectangular shape in side view extending rightward from the front end portion of the frame portion 200, and the frame portion 200. A frame portion 204 having a substantially rectangular shape in a side view extending in the right direction from the rear end portion of the frame. In FIG. 13, the boundary between the frame part 200 and the frame part 202 and the boundary between the frame part 200 and the frame part 204 are indicated by alternate long and short dash lines.

  Referring to FIG. 16, second case portion 184 further includes a rectangular plate-like portion 206 provided at the right end portion of frame portion 200 so as to connect frame portion 202 and frame portion 204. An upper end portion and a lower end portion of the plate-like portion 206 are connected to the frame portion 200. The frame part 202 and the frame part 204 protrude to the right side of the plate-like part 206.

  Referring to FIGS. 16, 18, and 19, in the second case portion 184, a substantially rectangular parallelepiped opening 200 a is formed by the frame portion 200 and penetrates in the left-right direction by the frame portion 202. 202a is formed, and a substantially rectangular parallelepiped through-hole 204a penetrating in the left-right direction is formed by the frame portion 204. The through hole 202a and the through hole 204a communicate with the opening 200a, respectively.

  With reference to FIGS. 17 to 19, a groove portion 200 b is formed along the left edge of the frame portion 200. In FIG. 16, the groove portion 200b is not shown in order to avoid the drawing from being complicated. With reference to FIGS. 16 to 19, the frame portion 194 of the first case portion 182 has the groove portion 200 b (FIGS. 17 to 19) in a state where the annular waterproof seal 208 is fitted in the groove portion 200 b (see FIGS. 17 to 19). 19). Thereby, the 1st case part 182 and the 2nd case part 184 are connected. The first case portion 182 and the second case portion 184 are further fixed to each other by a plurality of fasteners (not shown) such as screws.

  Referring to FIGS. 13 and 16, third case portion 186 connects frame portions 210 and 212 that are provided in the front-rear direction and substantially parallel to each other, and to connect frame portion 210 and frame portion 212. Including a plate-like portion 214 provided on the plate. Each of the frame part 210, the frame part 212, and the plate-like part 214 has a substantially rectangular shape in a side view. The frame part 210 and the frame part 212 protrude to the left of the plate-like part 214.

  Referring to FIGS. 16, 18, and 19, third case portion 186 is further provided along the outer peripheral edge and protrudes rightward from frame portion 210, frame portion 212, and plate-like portion 214. 216.

  In the third case portion 18, a substantially rectangular parallelepiped through-hole 210 a penetrating in the left-right direction is formed by the frame portion 210, and a substantially rectangular parallelepiped through-hole 212 a penetrating in the left-right direction is formed by the frame portion 212.

  Referring to FIGS. 18 and 19, groove portion 210 b is formed along the left edge of frame portion 210, and groove portion 212 b is formed along the left edge of frame portion 212. The groove part 210b and the groove part 212b are opened toward the left direction. In FIG. 16, the groove part 210 b and the groove part 212 b are not shown in order to avoid the drawing from becoming complicated.

  Referring to FIGS. 16, 18, and 19, frame portion 202 of second case portion 184 is formed in groove portion 210 b (see FIG. 18) in a state where annular waterproof seal 218 is fitted in groove portion 210 b (see FIGS. 18 and 19). 18 and FIG. 19). Similarly, the frame portion 204 of the second case portion 184 is inserted into the groove 212b (see FIGS. 18 and 19) in a state where the annular waterproof seal 220 is fitted in the groove 212b (see FIGS. 18 and 19). Thereby, the frame part 202 and the frame part 210 are connected, and the frame part 204 and the frame part 212 are connected. That is, the second case portion 184 and the third case portion 186 are connected. The second case portion 184 and the third case portion 186 are further fixed to each other by a plurality of fasteners (not shown) such as screws.

  Referring to FIGS. 13, 16, and 17, fourth case portion 188 includes a support portion 222 and a heat dissipation portion 224 that protrudes rightward from support portion 222. The support part 222 includes a frame part 226 and side wall parts 228 and 230, similarly to the support part 190.

  Referring to FIG. 13, side wall portion 228 has a pair of bosses 228 a extending in the left direction, and a through hole 228 b for projecting a minus terminal 270 described later from the inside of case 180 to the outside of case 180. One boss 228a is provided at the front end of the side wall 228 (see FIG. 17) so as to face the boss 196a (see FIG. 17) provided at the front end of the side wall 196 (see FIG. 17) in the left-right direction. It is done. The other boss 228a is provided at the rear end portion of the side wall portion 228 so as to face the boss 196a provided at the rear end portion of the side wall portion 196 (see FIG. 17) in the left-right direction.

  Referring to FIG. 17, like the side wall part 198 of the first case part 182, the side wall part 230 has a pair of bosses 230 a (only one boss 230 a is shown in FIG. 17) extending in the left direction. One boss 230 a is provided at the front end of the side wall 230 so as to face the boss 198 a provided at the front end of the side wall 198 in the left-right direction. The other boss 230a is provided at the rear end of the side wall 230 so as to face the boss 198a provided at the rear end of the side wall 198 in the left-right direction.

  Referring to FIGS. 17 to 19, a groove portion 226 a is formed along the left edge of the frame portion 226. The groove 226a is open toward the left. In FIG. 16, the groove portion 226a is not shown in order to avoid the drawing from being complicated. With reference to FIGS. 16 to 19, the protruding portion 216 of the third case portion 186 has the groove portion 226 a (FIGS. 17 to 19) in a state where the annular waterproof seal 232 is fitted in the groove portion 226 a (see FIGS. 17 to 19). 19). Thereby, the 3rd case part 186 and the 4th case part 188 are connected. The third case portion 186 and the fourth case portion 188 are further fixed to each other by a plurality of fasteners (not shown) such as screws.

  Referring to FIGS. 13 and 18, in case 180 combined as described above, the second case portion 184 and the third case portion 186 allow heat dissipation to pass through substantially the center portion of case 180 in the vertical direction. A space 234 is formed. In this embodiment, the heat radiation space 234 is formed as a through hole. 18 and 19, in this embodiment, the first housing portion Y1 is constituted by the first case portion 182, the frame portion 200 of the second case portion 184, and the plate-like portion 206 of the second case portion 184. The second housing portion Y2 is configured by the plate-like portion 214 of the third case portion 186, the protruding portion 216 of the third case portion 186, and the fourth case portion 188, and the frame portion 202 of the second case portion 184, The frame portion 204 of the second case portion 184, the frame portion 210 of the third case portion 186, and the frame portion 212 of the third case portion 186 constitute a connecting portion Y3. Referring to FIG. 18, the first housing portion Y1 has a first housing space 236 for housing the first battery unit 24a, and the second housing portion Y2 is for housing the second battery unit 26a. A second accommodating space 238 is provided. The 1st accommodation space 236 and the 2nd accommodation space 238 are connected via penetration hole 202a, 204a, 210a, 212a of connecting part Y3.

Next, the battery unit 22a will be described in detail. First, the second battery unit 26a will be described.
FIG. 20 is an exploded perspective view showing the second battery unit 26a. FIG. 21 is a side view illustrating the inside of the battery pack 10a as viewed from the right side. In FIG. 21, the fourth case portion 188 (see FIG. 16) and the waterproof seal 232 (see FIG. 16) are not shown in order to facilitate understanding of the internal structure of the battery pack 10a.

  Referring to FIGS. 14, 20 and 21, the second battery unit 26a includes a plurality of rechargeable batteries 90 (see FIGS. 20 and 21), a battery holder 240, and a battery holder 242 (see FIG. 7), and a control unit 244. As the battery 90, the same battery as the battery 90 of the battery pack 10 can be used. Referring to FIGS. 20 and 21, in this embodiment, batteries 90 are arranged in front and rear 12 rows and upper and lower 7 stages. The batteries 90 in the upper and lower adjacent stages are arranged so that the batteries 90 adjacent to each other are positioned in the middle by being shifted back and forth. Also, the batteries 90 in the upper and lower adjacent stages are arranged in the opposite direction to the adjacent batteries 90, and the batteries 90 in the adjacent rows in the front and rear are arranged in the same direction as the adjacent batteries 90. Specifically, the batteries 90 in the first, third, fifth and seventh stages from the top are arranged so that the end electrodes 90a (positive electrodes) face the left side, and the second stage from the top, The batteries 90 in the fourth and sixth stages are arranged so that the end electrode 90b (minus pole) faces the left side.

  14 and 20, the battery holder 240 includes a substantially rectangular plate-like portion 240a, a holder portion 240b protruding leftward from the plate-like portion 240a, and a plurality of (in this embodiment) extending forward from the holder portion 240b. Two bosses 240c (see FIG. 20) and a substantially rectangular plate-like part 240d extending upward from the holder part 240b. The plate-like portion 240d is provided on the left side of the plate-like portion 240a.

  Referring to FIG. 20, battery holder 240 has a plurality of through holes 240e that penetrate plate-like portion 240a and holder portion 240b in the left-right direction. The plurality of through holes 240e are formed corresponding to the plurality of batteries 90. At the four corners of the plate-like portion 240a, substantially cylindrical bosses 240f are provided so as to extend in the left-right direction.

  The battery holder 242 includes a holder part 242a and a boss 242b extending forward from the holder part 242a. The holder part 242a has a plurality of through holes 242c penetrating in the left-right direction. The plurality of through holes 242 c are formed corresponding to the plurality of batteries 90.

  The battery holder 240 and the battery holder 242 are combined so that the battery 90 is accommodated in the through hole 240e and the through hole 242c. The battery holder 240 and the battery holder 242 are fixed by, for example, a plurality of fasteners (for example, screws) not shown.

  The control unit 244 includes a rectangular circuit board 244a, a CPU (not shown) and a memory (not shown) mounted on the circuit board 244a. The control unit 244 monitors the state of the battery 90 by detecting the temperature, current, voltage, usage frequency, and the like of the battery 90 and controls the battery 90. As the control unit 244, for example, a BMC (Battery Management Controller) can be used.

  14, 20, and 21, circuit board 244 a includes battery holder 240 (see FIGS. 14 and 20) by a plurality (three in this embodiment) of screws 246 (see FIGS. 14 and 21). The boss 240c (see FIGS. 20 and 21) and the battery holder 242 (see FIGS. 14 and 20) are attached to the boss 242b (see FIGS. 20 and 21). As a result, the control unit 244 is fixed to the battery holder 240 and the battery holder 242.

  Referring to FIG. 20, a plurality (three in this embodiment) of lead plate 248a and lead plate 248b are connected to the left end of a plurality of batteries 90. Specifically, one lead plate 248a is connected to the end electrodes 90a (plus poles) of the plurality of batteries 90 in the first stage from the top and the end electrodes 90b (minus poles) of the plurality of batteries 90 in the second stage. Is done. Thereby, the end electrodes 90a of the plurality of batteries 90 in the first stage are electrically connected in parallel, and the end electrodes 90b of the plurality of batteries 90 in the second stage are electrically connected in parallel. In addition, the end electrodes 90a of the plurality of first-stage batteries 90 and the end electrodes 90b of the plurality of second-stage batteries 90 are electrically connected in series. Lead plate 248b is welded to, for example, end electrode 90a and end electrode 90b. Similarly, two lead plates 248a are connected to the plurality of batteries 90 in the third to sixth stages.

  The lead plate 248b has a main body portion 248c extending in the front-rear direction and a hook-shaped portion 248d protruding downward from the main body portion 248c. The tip of the hook-shaped portion 248d extends in the right direction. The main body 248c of the lead plate 248b is connected to the end electrodes 90a of the plurality of batteries 90 in the seventh row from the top. As a result, the end electrodes 90a of the seventh-stage batteries 90 are electrically connected in parallel. The main body 248c of the lead plate 248b is welded to, for example, the end electrode 90a. Referring to FIG. 19, hook-shaped portion 248 d of lead plate 248 b is fixed to holder portion 240 b of battery holder 240 by screws 250.

  Referring to FIG. 20, a lead plate 252a and a plurality (three in this embodiment) of lead plates 252b are connected to the right end portions of the plurality of batteries 90. The lead plate 252a has a main body part 252c extending in the front-rear direction and a hook-like part 252d protruding upward from the main body part 252c. The tip of the hook-shaped portion 252d extends in the left direction. The main body 252c of the lead plate 252a is connected to the end electrodes 90b of the plurality of batteries 90 in the first stage from the top. Thereby, the end electrodes 90b of the plurality of batteries 90 in the first stage are electrically connected in parallel. The main body 252c of the lead plate 252a is welded to, for example, the end electrode 90b. Referring to FIGS. 14 and 18, hook-shaped portion 252 d of lead plate 252 a is fixed to holder portion 242 a of battery holder 242 by screws 254.

  Referring to FIG. 20, one lead plate 252b is connected to end electrodes 90a of a plurality of batteries 90 in the second stage from the top and end electrodes 90b of a plurality of batteries 90 in the third stage from the top. Thereby, the end electrodes 90a of the plurality of batteries 90 in the second stage are electrically connected in parallel, and the end electrodes 90b of the plurality of batteries 90 in the third stage are electrically connected in parallel. In addition, the end electrodes 90a of the plurality of second-stage batteries 90 and the end electrodes 90b of the plurality of third-stage batteries 90 are electrically connected in series. Lead plate 252b is welded to, for example, end electrode 90a and end electrode 90b. Similarly, two lead plates 252b are connected to a plurality of batteries 90 in the fourth to seventh stages.

  In the second battery unit 26a, the plurality of batteries 90 in the first to seventh stages are connected as described above, whereby the plurality of batteries 90 in each stage are electrically connected in parallel and 1 A plurality of batteries 90 in the seventh to seventh stages are electrically connected in series.

  Referring to FIG. 14, the leading end of each lead plate 248a, the leading end of lead plate 248b, the leading end of lead plate 252a, and the leading end of each lead plate 252b are connected to control unit 244 via lead wires (not shown). Connected to the circuit board 244a. Thereby, the control part 244 can detect the voltage of the battery 90 of each stage of the 2nd battery unit 26a.

  14, 18, and 21, terminals 256 and 258 similar to terminals 134 and 138 (see FIG. 2) of battery pack 10 are provided on plate-like portion 240 d of battery holder 240. Referring to FIG. 21, terminal 256 is fixed to plate-shaped portion 240 d by screws 262 together with one end portion of lead plate 260 that is substantially L-shaped in side view. Referring to FIG. 14, FIG. 18 and FIG. 21, the other end of lead plate 260 is fixed to holder portion 242a by screw 264 together with flanged portion 252d of lead plate 252a. Thereby, the some battery 90 and the terminal 256 of the 2nd battery unit 26a are electrically connected.

  Referring to FIGS. 14 and 18, terminal 258 is fixed to plate-shaped portion 240 d by screw 268 together with one end portion of lead plate 266 that is bent in a step shape in plan view. At the upper end of the plate-like portion 240a, a charge / discharge minus terminal 270 is provided in front of the plate-like portion 240d so as to extend in the right direction. The minus terminal 270 is fixed to the plate-like portion 240 a together with the other end portion of the lead plate 266. Thereby, the terminal 258 and the minus terminal 270 are electrically connected.

Next, the first battery unit 24a will be described.
Referring to FIGS. 14 and 15, first battery unit 24 a includes a battery holder 272, a battery holder 274, and a plurality of batteries 90 (see FIG. 15) accommodated in battery holders 272 and 274.

  The battery holder 272 has the same configuration as the holder part 242a of the battery holder 242 of the second battery unit 26a, and has a plurality of through holes (not shown) for accommodating a plurality of batteries 90.

  The battery holder 274 has the same configuration as the battery holder 240 of the second battery unit 26a, and includes a substantially rectangular plate-like portion 274a and a holder portion 274b that protrudes rightward from the plate-like portion 274a. Similarly to the battery holder 240, the battery holder 274 has a plurality of through holes (not shown) for accommodating a plurality of batteries 90. At the four corners of the plate-like portion 274a, substantially cylindrical bosses 274c are provided so as to extend left and right.

  The battery holder 272 and the battery holder 274 are combined so that the plurality of batteries 90 are accommodated in the plurality of through holes of the battery holder 272 and the plurality of through holes of the battery holder 274. The battery holder 272 and the battery holder 274 are fixed by, for example, a plurality of fasteners (for example, screws) not shown.

  In this embodiment, the first battery unit 24a includes the same number of batteries 90 as the batteries 90 of the second battery unit 26a. Further, the plurality of batteries 90 of the first battery unit 24a are accommodated in the battery holders 272 and 274 in the same direction and the same arrangement as the plurality of batteries 90 of the second battery unit 26a shown in FIG. Therefore, in the battery unit 22a, the end electrode 90a of the battery 90 of the first battery unit 24a and the end electrode 90b of the battery 90 of the second battery unit 26a face each other, and the end of the battery 90 of the first battery unit 24a. The plurality of batteries 90 are arranged so that the partial electrode 90b and the end electrode 90b of the battery 90 of the second battery unit 26a face each other.

  Referring to FIG. 15, lead plate 276a and a plurality (three in this embodiment) of lead plates 276b are connected to the left end portions of a plurality of batteries 90 accommodated in battery holders 272 and 274. The lead plate 276a has a main body portion 276c extending in the front-rear direction and a hook-shaped portion 276d protruding upward from the main body portion 276c. The tip of the hook-shaped portion 276d extends in the right direction. The main body 276c of the lead plate 276a is connected to the end electrodes 90a of the plurality of batteries 90 in the first stage from the top. Thereby, the end electrodes 90a of the plurality of batteries 90 in the first stage are electrically connected in parallel. The main body 276c of the lead plate 276a is welded to, for example, the end electrode 90a. Referring to FIGS. 15 and 18, hook-shaped portion 276 d of lead plate 276 a is fixed to holder portion 242 a of battery holder 242 with screws 278.

  Referring to FIG. 15, one lead plate 276b is connected to end electrodes 90b of a plurality of batteries 90 in the second stage from the top and end electrodes 90a of a plurality of batteries 90 in the third stage from the top. Thereby, the end electrodes 90b of the plurality of batteries 90 in the second stage are electrically connected in parallel, and the end electrodes 90a of the plurality of batteries 90 in the third stage are electrically connected in parallel. In addition, the end electrodes 90b of the plurality of second-stage batteries 90 and the end electrodes 90a of the plurality of third-stage batteries 90 are electrically connected in series. Lead plate 276b is welded to end electrode 90b and end electrode 90a, for example. Similarly, two lead plates 276b are connected to a plurality of batteries 90 in the fourth to seventh stages.

  Referring to FIG. 14, a lead plate 278a and a plurality (three in this embodiment) of lead plates 278b are connected to the right end of a plurality of batteries 90 (see FIG. 15) housed in battery holders 272 and 274. The Specifically, the end electrodes 90b (see FIG. 15) of the plurality of batteries 90 (see FIG. 15) at the first stage from the top and the end electrodes 90a (see FIG. 15) of the plurality of batteries 90 at the second stage (see FIG. 15). One lead plate 278a is connected to (see FIG. 15). Thereby, the end electrodes 90b of the plurality of batteries 90 in the first stage are electrically connected in parallel, and the end electrodes 90a of the plurality of batteries 90 in the second stage are electrically connected in parallel. Further, the end electrodes 90b of the plurality of batteries 90 in the first stage and the end electrodes 90a of the plurality of batteries 90 in the second stage are electrically connected in series. Lead plate 278b is welded to, for example, end electrode 90b and end electrode 90a. Similarly, two lead plates 278a are connected to a plurality of batteries 90 in the third to sixth stages.

  Referring to FIG. 16, lead plate 278b has a main body portion 278c extending in the front-rear direction, and a hook-shaped portion 278d protruding downward from main body portion 278c. The tip of the hook-shaped portion 278d extends in the left direction. The main body 278c of the lead plate 278b is connected to the end electrodes 90b (see FIG. 15) of the plurality of batteries 90 (see FIG. 15) in the seventh row from the top. Thereby, the end electrodes 90b of the plurality of batteries 90 in the seventh stage are electrically connected in parallel. The main body 278c of the lead plate 278b is welded to, for example, the end electrode 90b. Referring to FIG. 19, hook-shaped portion 278 d of lead plate 278 b is fixed to holder portion 274 b of battery holder 274 with screws 280.

  In the first battery unit 24a, the plurality of batteries 90 in the first to seventh stages are connected as described above, whereby the plurality of batteries 90 in each stage are electrically connected in parallel and 1 A plurality of batteries 90 in the seventh to seventh stages are electrically connected in series.

  14 and 17, the lead plate 276a, the plurality of lead plates 276b, the plurality of lead plates 278a, and the lead plate 278b are electrically connected to the circuit board 244a of the control unit 244 by the plurality of lead wires 281. The Thereby, the control part 244 can detect the voltage of the battery 90 of each stage of the 1st battery unit 24a.

  Referring to FIGS. 15 and 18, a fuse 282 is provided in front of the flange-shaped portion 276 d at the upper end portion of the plate-shaped portion 274 a, and a positive terminal 284 for discharging extends in the left direction in front of the fuse 282. Is provided. One terminal 282a of the fuse 282 is fixed to the plate-shaped portion 274a by a screw 288 together with the upper end portion of the substantially L-shaped lead plate 286. The lower end portion of the lead plate 286 is fixed to the battery holder 272 by a screw 290 together with the flange portion 276d of the lead plate 276a. Referring to FIG. 18, the other terminal 282 b of the fuse 282 is fixed to the plate-like portion 274 a by a screw 294 together with the rear end portion of the lead plate 292 extending in the front-rear direction. The front end portion of the lead plate 292 is fixed to the plate-like portion 274 a together with the plus terminal 284. Thereby, as shown in FIG. 22, the plurality of batteries 90 of the first battery unit 24 a are electrically connected to the plus terminal 284 via the fuse 282.

  Referring to FIG. 19, a connecting portion 296 is provided so as to extend in the left-right direction through the through holes 202a and 210a of the connecting portion Y3. One end of the connecting portion 296 is fixed to the holder portion 274b by a screw 297 together with the flange portion 278d of the lead plate 278b, and the other end is fixed to the holder portion 240b by a screw 297 together with the flange portion 248d of the lead plate 248b. Thereby, as shown in FIG. 22, the plurality of batteries 90 of the first battery unit 24 a and the plurality of batteries 90 of the second battery unit 26 b are electrically connected in series by the connection portion 296. As the connection portion 296, for example, a lead plate or a lead wire can be used.

  Referring to FIG. 13, service plug 298 is attached to frame portion 226 of fourth case portion 188. The service plug 298 has a connection terminal (not shown) protruding from the frame portion 226 into the case 180, and the terminal 256 (see FIG. 14) and the terminal 258 (see FIG. 14) are connected by the connection terminal. . Thereby, referring to FIG. 22, a plurality of batteries 90 of first battery unit 24a and a plurality of batteries 90 of second battery unit 26a electrically connected in series are connected to minus terminal 270 via service plug 298. Is electrically connected. Similar to the service plug 148 of the battery pack 10, the service plug 298 is detachably provided on the frame portion 226.

  Although not shown in each drawing other than FIG. 22 in order to avoid the complexity of the drawing, the battery unit 22a has information about the positive terminal 300 for charging and the battery 90 (temperature, current, voltage and use). Frequency and the like) and a RXD terminal 304 for receiving control information of the battery 90 from a device external to the battery pack 10a. The plus terminal 300, the TXD terminal 302, and the RXD terminal 304 are electrically connected to the control unit 244, respectively.

  Referring to FIGS. 14 to 19, four cylindrical collars 306 are provided so as to be supported by four bosses 274 c of battery holder 274 and four bosses 240 f of battery holder 240, respectively. 18 and 19, the two collars 306 on the front side are disposed so as to pass through the through holes 202a and 210a of the connecting portion Y3. The two rear collars 306 are disposed so as to pass through the through holes 204a and 212a of the connecting portion Y3. Although not shown in FIGS. 18 and 19, the plurality of lead wires 281 (see FIG. 17) are provided so as to pass through the through holes 202a and 210a of the connecting portion X3.

  Referring to FIG. 17, the tip (right end) of a pair of bosses 196a (only one boss 196a is shown in FIG. 17) and a pair of bosses 198a (one in FIG. 17) The tip ends of only the boss 198a are fitted into the four bosses 274c, respectively. Similarly, the tip end portion (left end portion) of the pair of bosses 228a (only one boss 228a is shown in FIG. 17) and the pair of bosses 230a (only one boss 230a is shown in FIG. 17) of the fourth case portion 188. ) Are fitted into the four bosses 240f, respectively. Then, bolts 308 are inserted into the collars 306 from the right side of the fourth case portion 188, and nuts 310 are attached to the tip portions of the bolts 308. Thereby, the battery unit 22a is supported by the support portion 190 and the support portion 222.

Hereinafter, the function and effect of the battery pack 10a will be described.
Similarly to the battery pack 10, the battery pack 10 a includes the first battery unit 24 a and the second battery unit 26 a that are electrically connected by the connection portion 296, so that the amount of energy can be increased. Moreover, since the 1st battery unit 24a and the 2nd battery unit 26a are arrange | positioned on both sides of the space 234 for thermal radiation, it can suppress that the planar space for arrange | positioning the some battery 90 becomes large. The heat generated in the first battery unit 24a is released from the heat radiating portion 192 of the first case portion 182 to the outside of the case 180, and from the plate-like portion 206 of the second case portion 184 to the heat radiating space 234. Released. Further, the heat generated in the second battery unit 26 a is released from the heat radiating portion 224 of the fourth case portion 188 to the outside of the case 180 and from the plate-like portion 214 of the third case portion 186 to the heat radiating space 234. Released. As a result, the heat dissipation of the battery pack 10a can be increased.

  In the battery pack 10a, the first housing portion Y1 is formed by combining the first case portion 182 and the second case portion 184, and the connecting portion is formed by combining the second case portion 184 and the third case portion 186. Y3 is formed, and the second housing portion Y2 is formed by combining the third case portion 186 and the fourth case portion 188. Further, by combining the second case portion 184 and the third case portion 186, a heat radiation space 234 is formed between the second case portion 184 and the third case portion 186. In this way, the case 180 can be easily obtained.

  Further, in the battery pack 10a, a connection portion 296 that electrically connects the first battery unit 24a and the second battery unit 26a is accommodated in the case 180. Here, when a part of the connection portion 296 for electrically connecting the first battery unit 24 a and the second battery unit 26 a is provided outside the case 180, the connection portion 296 is placed outside the case 180. A guide part (for example, a hole penetrating the case) for guiding must be provided in the case 180. In this case, since the sealing performance of the case 180 is reduced in the guide portion, it is necessary to take measures (such as a waterproof seal) for improving the sealing performance of the case 180 on the guide portion. However, in the battery pack 10a, since the connection portion 296 is accommodated in the case 180, it is not necessary to provide a guide portion for guiding the connection portion 296 to the outside of the case 180. Therefore, there is no need for measures for improving the sealing performance as described above, and the sealing performance of the case 180 can be easily increased.

  Referring to FIG. 18, when first battery unit 24 a is viewed from the side (for example, when viewed from second housing portion Y <b> 2), part of frame portions 202 and 204 and frame portions 210 and 212. , That is, a part of the connecting portion Y3 overlaps a part of the first battery unit 24a. Similarly, referring to FIG. 21, when the second battery unit 26a is viewed from the side (for example, when viewed from the first housing portion Y1 (see FIG. 18)), the connecting portion Y3 (see FIG. 18). Is partially overlapped with a part of the second battery unit 26a. By thus forming the connecting portion Y3, the length of the case 180 in the front-rear direction can be shortened. Thereby, the planar size of the case 180 can be reduced, and the battery pack 10a can be configured in a small size.

  In the battery pack 10a, the connecting portion Y3 plays a role of connecting the first housing portion Y1 and the second housing portion Y2 and also connects the connecting portion 296 (see FIG. 19) from the first housing portion Y1 to the second housing. It plays a role of guiding to the part Y2. Therefore, in the battery pack 10a, it is not necessary to provide a configuration for guiding the connecting portion 296 from the first housing portion Y1 to the second housing portion Y2 separately from the connecting portion Y3. As a result, the configuration of the battery pack 10a can be simplified.

  Further, in the battery pack 10a, a plurality of batteries 90 are arranged such that one end surface (end electrode 90a or end electrode 90b) of each battery 90 faces the heat radiation space 234. Thereby, like the battery pack 10, the compact battery pack 10a with improved heat dissipation can be obtained.

  Moreover, in the battery pack 10a, since the through-hole penetrating in the vertical direction is used as the heat dissipation space 234, heat can be efficiently released in the vertical direction through the heat dissipation space 234.

  In the battery pack 10a, the plurality of batteries 90 of the first battery unit 24a and the plurality of batteries 90 of the second battery unit 26a are electrically connected in series, so that the output voltage of the battery pack 10a is sufficiently high. it can.

  Moreover, in the battery pack 10a, since the 1st battery unit 24a and the 2nd battery unit 26a can be controlled by one control part 244, the control system of the battery pack 10a can be constructed | assembled with a simple structure.

  The battery pack 10 and the battery pack 10a described above can be suitably used for a saddle-ride type vehicle. Hereinafter, the case where the above-described battery pack 10 is used for an electric motorcycle 312 which is an example of a saddle-ride type vehicle will be described.

FIG. 23 is a side view showing the electric motorcycle 312.
Referring to FIG. 23, the electric motorcycle 312 has a body frame 314. The body frame 314 includes a head pipe 316, a pair of front frames 318 extending obliquely downward from the head pipe 316, and a pair of rear frames connected to the rear portions of the pair of front frames 318 and rising obliquely upward. 320. The pair of front frames 318 are arranged so as to be arranged side by side, and the pair of rear frames 320 are arranged so as to be arranged side by side. In FIG. 23, only one front frame 318 of the pair of front frames 318 is illustrated, and only one rear frame 320 of the pair of rear frames 320 is illustrated.

  A steering shaft 322 is rotatably inserted into the head pipe 316. A handle support portion 324 is attached to the upper end of the steering shaft 322, and the handle 326 is fixed to the handle support portion 324. A front fork 328 is attached to the lower end of the steering shaft 322, and a front wheel 330 is rotatably attached to the lower end of the front fork 328.

  A front end portion of the rear arm 334 is attached to a rear end portion of the pair of front frames 318 via a pivot shaft 332, and the rear arm 334 is swingably provided. For example, an axial gap type electric motor 336 is incorporated in the rear end 334a of the rear arm 334. The electric motor 336 is connected to the rear wheel 338 and rotationally drives the rear wheel 338. A driving unit 340 is built in the rear arm 334. The battery pack 10 is provided between the pair of rear frames 320, and the seat 342 is provided above the battery pack 10. Battery pack 10 is electrically connected to electric motor 336 and drive unit 340.

  In the electric motorcycle 312, electric power is supplied from the battery pack 10 to the electric motor 336 and the drive unit 340, and the electric motor 336 and the drive unit 340 are driven. The drive unit 340 controls the rotational drive of the electric motor 336. Thereby, traveling of the electric motorcycle 312 is controlled.

  As described above, according to the battery pack 10 of the present invention, although the amount of energy can be increased, the heat dissipation is high and the planar space for arranging a plurality of batteries can be reduced. Therefore, even in the electric motorcycle 312 having a limited space for mounting the battery pack, the battery pack 10 having high heat dissipation and a sufficient energy amount can be easily mounted. Thereby, the running performance of the electric motorcycle 312 can be improved.

  In addition, although the electric motorcycle 312 mounted with the battery pack 10 has been described, the battery pack 10a can be similarly mounted on the electric motorcycle.

  The straddle-type vehicle to which the present invention is applied is not limited to the electric motorcycle 312 described above. Specifically, the present invention can be applied to various straddle-type vehicles including scooters, rough terrain vehicles (ALL-TERRAIN VEHICLE), snowmobiles, and the like.

  Moreover, the battery pack according to the present invention can be suitably used not only for a saddle-type electric vehicle but also for various electric vehicles.

10, 10a Battery pack 12, 180 Case 14, 182 First case portion 16, 184 Second case portion 18, 186 Third case portion 20, 188 Fourth case portion 22, 22a Battery unit 24, 24a First battery unit 26 , 26a Second battery unit 28 Connection unit 84, 234 Radiation space 90 Battery 90a, 90b End electrode 96, 244 Control unit 312 Electric motorcycle X1, Y1 First storage unit X2, Y2 Second storage unit X3, Y3 Connection unit X4,296 connection

Claims (10)

One case having a first housing portion and a second housing portion formed across a heat dissipation space, and a connecting portion for connecting the first housing portion and the second housing portion;
A first battery unit that includes a plurality of rechargeable batteries arranged in parallel to each other and a lead plate that connects one end of each battery and is housed in the first housing part;
A second battery unit including a plurality of rechargeable batteries arranged in parallel to each other and a lead plate connecting one end of each battery and housed in the second housing part;
A battery pack for a saddle-ride type vehicle, comprising: a connection portion that electrically connects the plurality of batteries of the first battery unit and the plurality of batteries of the second battery unit. The case is
A first case portion located outside the first battery unit;
A second case part located between the first battery unit and the heat radiation space and combined with the first case part;
A third case part located between the heat dissipation space and the second battery unit and combined with the second case part;
A fourth case part located outside the second battery unit and combined with the third case part;
The first housing part is formed by the first case part and the second case part,
The connecting part is formed by the second case part and the third case part,
The second housing part is formed by the third case part and the fourth case part,
The battery pack for a saddle-ride type vehicle according to claim 1, wherein the heat dissipation space is formed between the second case portion and the third case portion.   The battery pack of the saddle riding type vehicle according to claim 1, wherein the connection portion is housed in the case. The connecting portion is provided to pass through the connecting portion;
When the first battery unit is viewed from the second housing portion, the connecting portion overlaps at least a part of the connection portion with the first battery unit, and the second battery unit is viewed from the first housing portion. The battery pack for a saddle-ride type vehicle according to claim 3, wherein at least a part of the connecting portion overlaps with the second battery unit when the battery pack is connected.   The battery has a substantially cylindrical shape, the length of the battery in the axial direction is longer than the diameter of the battery, and the battery is disposed so that one end surface of the battery faces the heat dissipation space. The battery pack of the saddle riding type vehicle according to 1.   The battery pack of the saddle riding type vehicle according to claim 1, wherein the heat radiation space is a through hole.   The battery pack of the saddle-ride type vehicle according to claim 1, wherein the first battery unit and the second battery unit are electrically connected in parallel.   The battery pack for a saddle-ride type vehicle according to claim 1, wherein the first battery unit and the second battery unit are electrically connected in series.   The straddle-type vehicle according to claim 1, comprising one control unit that controls the first battery unit and the second battery unit.   A straddle-type vehicle comprising the battery pack according to any one of 1 to 9 above.

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