JP7376140B2 - Secondary battery unit, jump starter, and secondary battery device - Google Patents

Description

The present invention relates to a secondary battery unit that includes a secondary battery that covers a power generation section with a film, and a jump starter that includes the secondary battery unit.

This type of secondary battery unit is made up of a frame holding a flat secondary battery such as a lithium ion battery. As such a secondary battery, there is a pouch-type secondary battery in which a thick power generation part is wrapped in a laminate film, as described in Patent Document 1, for example. As shown in FIG. 2 of Patent Document 1, a pouch-type secondary battery is constructed by sandwiching the entire peripheral edge of the battery, which is joined by a laminate film, around the power generation part of the battery, between two frames. The peripheral edge is held so that it does not protrude from the frame.

JP2018-139199 Publication

However, in Patent Document 1, since the peripheral edge of the secondary battery is sandwiched between the flat surfaces of the two frames, the secondary battery tends to shift with respect to the frames. Particularly in the case of stacking and assembling a large number of secondary batteries, if each secondary battery is misaligned, positioning of the secondary batteries takes time and effort. Moreover, since secondary batteries thermally expand during charging and discharging, they may become dislodged during use, and may also become dislodged due to vibration or impact. If the secondary battery is misaligned with respect to the frame, depending on the amount of misalignment, the power generation part of the secondary battery housed inside the frame may rub against the frame, damaging the laminate film and causing fluid leakage. There is also.

By the way, secondary batteries such as lithium ion batteries may generate heat and gas during charging and discharging, resulting in an increase in internal pressure and thermal expansion. An increase in pressure within a secondary battery can cause damage to the battery, so in pouch-type secondary batteries covered with a film, the pressure can be released from the periphery of the film. However, if the entire periphery of the battery is covered with two frames to prevent the periphery of the battery from protruding from the frame, there is no place for gas or pressure to escape, and the battery may be damaged. Taking these circumstances into consideration, the present invention effectively suppresses misalignment of the secondary battery with respect to the frame by increasing the holding power of the secondary battery by the frame, and further prevents damage to the battery due to thermal expansion. An object of the present invention is to provide a secondary battery unit, a jump starter, and a secondary battery device that can prevent this.

In order to solve the above problems, a secondary battery unit of the present invention is a secondary battery unit that holds a chargeable/dischargeable battery whose power generation part is covered with a film, and includes at least a first frame body and a second frame body. a battery holder that holds the battery by sandwiching the peripheral edge of the battery film between the first frame body and the second frame body; and a first frame body that abuts the battery film of the first frame body. A battery holder, comprising: a convex portion protruding toward the film side on a surface thereof; and a concave portion into which the convex portion is inserted through the film on a second surface that abuts the film of the battery of the second frame. By sandwiching the peripheral edge of the battery film protruding from the first frame and the second frame between the convex part and the concave part, the peripheral edge bent toward the first frame is exposed outside the first frame. hold it.

According to an aspect of the present invention, the peripheral edge of the film of the battery is held between the convex part of the first frame body and the concave part of the second frame body, and the battery is held between the first frame body and the second frame body. is firmly fixed. This increases the holding power of the battery, and can effectively suppress misalignment of the battery with respect to the first frame and the second frame. Therefore, the effort of positioning the battery can be reduced, and damage to the battery film can also be suppressed. In addition, by sandwiching the peripheral edge of the battery film protruding from the first frame and the second frame between the convex portion and the recess, the peripheral edge of the battery film that is bent toward the first frame can be removed from the first frame. It can be kept exposed outside. As described above, according to this aspect, the peripheral edge of the battery film is not exposed to the outside of the frame and is covered by the frame, but rather is actively exposed outside the frame, so that the battery can be protected. Even in the event of thermal expansion, the peripheral edge of the battery is exposed to the outside, creating a place for gas and pressure to escape, thereby effectively suppressing damage to the battery due to thermal expansion and improving safety.

In a preferred embodiment of the secondary battery unit of the present invention, the outer edge of the first frame is provided with a groove in which the tip of the peripheral edge bent toward the first frame is accommodated while being exposed outside the first frame. According to this aspect, by providing the groove on the outer edge of the first frame, the leading end of the peripheral edge of the battery film bent toward the first frame is easily guided to the groove and easily bent. In addition, since the tip of the peripheral edge of the battery film is accommodated in the groove of the first frame, it is possible to prevent wiring or the like from getting caught in the tip.

In a preferred embodiment of the secondary battery unit of the present invention, the battery includes a pair of electrode tabs extending from the peripheral edge of the film, and a pair of electrode tabs protruding from the first frame is provided on the outer surface of the first frame. An electrode arrangement part is provided, one or the other of which is bent and arranged, and the convex part of the first frame and the concave part of the second frame are located at positions sandwiching the peripheral part where the electrode tab does not exist on the film of the battery. According to this aspect, the convex portion of the first frame body and the concave portion of the second frame body are located at positions sandwiching the peripheral portion of the battery film where the electrode tabs are not present, so that the electrode tabs are not displaced or deformed. , the holding power of the battery can be increased.

In a preferred embodiment of the secondary battery unit of the present invention, a battery other than the battery and a third frame are stacked on the first frame on the opposite side of the second frame, and the first frame and the third frame are stacked on the opposite side of the second frame. If the battery sandwiched between the two frames is a first battery, and the other battery sandwiched between the first frame and the third frame is a second battery, then the first battery and the second battery are: The first battery has a pair of electrode tabs extending from the peripheral edge of the film, and one or the other of the electrode tabs of the first battery that protrudes from the first frame is bent and placed in the electrode arrangement part, and the first battery that protrudes from the first frame One or the other of the electrode tabs of the two batteries is bent and arranged in the electrode arrangement part so as to overlap the electrode tab of the first battery, and the overlapping part of the electrode tab of the first battery and the electrode tab of the second battery is conductive. The plate is pressed against the conductive plate and joined to the electrode placement portion using a fastening member. According to this aspect, the electrode tabs are arranged in the electrode placement part so as to overlap, the conductive plate is pressed against the overlapping part of the electrode tabs, and the conductive plate and the conductive plate are joined to the electrode placement part with the fastening member. Compared to the case of tightening with a fastening member without intervening, the contact area of the electrode tab can be increased, so voltage drop can be prevented.

In order to solve the above problems, a jump starter of the present invention includes a secondary battery unit according to any one of claims 1 to 4 provided inside a main body, and a secondary battery unit that is routed from the inside of the main body to the outside. A positive electrode cable and a negative electrode cable that output power from the secondary battery unit, the positive electrode cable is fixed at the first cable outlet extending from the inside of the main body to the outside, and the negative electrode cable is fixed from the inside of the main body to the outside. It is fixed at a second cable exit portion extending to the outside. According to an aspect of the present invention, the positive electrode cable and the negative electrode cable are fixed at the first cable outlet portion and the second cable outlet portion extending from the inside of the main body to the outside, respectively, so that the positive electrode cable and the negative electrode cable are fixed from the outside. Even if it is pulled, it can be made difficult to be pulled out.

In a preferred embodiment of the jump starter of the present invention, the secondary battery unit includes a circuit board provided with a positive terminal connected to the positive terminal of the battery and a negative terminal connected to the negative terminal of the battery, and the first cable outlet portion and The second cable outlet portions are provided on both sides of the main body with the secondary battery unit in between, and the positive electrode cable has its base end electrically connected to the positive terminal and is pulled around the outside of the secondary battery unit. The negative electrode cable is rotated and extends from the first cable outlet to the outside of the main body, and the tip is connected to the positive electrode clip, and the base end is electrically connected to the negative electrode terminal, and the negative electrode cable is connected to the secondary electrode in the opposite direction from the positive electrode cable. The cable is routed around the outside of the battery unit, extends from the second cable outlet to the outside of the main body, and has its tip connected to the negative electrode clip. According to this aspect, the first cable outlet part and the second cable outlet part are respectively provided on both sides of the main body with the secondary battery unit in between, and inside the main body, the positive electrode cable extends outside the secondary battery unit. Since the negative electrode cable is routed in the opposite direction to the positive electrode cable, it is possible to prevent the positive electrode cable and the negative electrode cable from coming off from the secondary battery unit even if the positive electrode cable and the negative electrode cable are pulled from the outside.

In a preferred embodiment of the jump starter of the present invention, the first cable outlet section is provided with a first waterproof mechanism, and the first waterproof mechanism includes a plurality of first ribs forming a plurality of first chambers and a plurality of first ribs forming a plurality of first chambers. a rubber member provided between the first rib and the positive electrode cable to close the plurality of first chambers and fix the positive electrode cable, and a second waterproof mechanism is provided at the second cable exit portion; A rubber member is provided between the plurality of second ribs and the negative electrode cable to close the plurality of second chambers and fix the negative electrode cable. . According to this aspect, the waterproof effect of the first cable outlet portion and the second cable outlet portion is enhanced, and liquid such as moisture is difficult to enter the main body. Even if liquid such as moisture enters the first cable outlet section or the second cable outlet section, it will first enter the plurality of first chambers or second chambers, so that it can be prevented from entering the secondary battery unit. Thereby, short-circuiting of the battery of the secondary battery unit due to moisture or the like can be suppressed. Further, the positive electrode cable is firmly fixed by the first rubber member, and the negative electrode cable is firmly fixed by the second rubber member. This makes it difficult for the positive electrode cable and the negative electrode cable to be easily pulled out even if they are pulled from the outside. Therefore, it is possible to prevent the positive electrode cable and the negative electrode cable from coming off from the secondary battery unit. Thereby, the safety of the secondary battery unit built into the jump starter can be improved.

In order to solve the above problems, the secondary battery device of the present invention includes a main body case accommodating a plurality of secondary battery units according to any one of claims 1 to 4, and a secondary battery unit provided in each of the secondary battery units. and a handle provided on each of the secondary battery units, the main case includes a side plate, a bottom plate that closes an opening on the bottom of the side plate, and a lid that closes an opening on the top of the side plate, The buffer member includes a top buffer member provided on the top surface of the handle. According to an aspect of the present invention, by separately providing a buffer member for each secondary battery unit, each of the secondary battery units can be securely connected, compared to a case where a common buffer member is provided for each secondary battery unit. Can be fixed. Furthermore, by providing the top buffer member on the top surface of the handle located at the top of each secondary battery unit, the size (especially height) of the top buffer member can be suppressed.

In a preferred embodiment of the secondary battery device of the present invention, the height of the top buffer member is higher than the top surface of the side plate, and when the lid portion is attached to the side plate, the top buffer member collapses, so that the secondary battery unit It is fixed to the main case. According to this aspect, since the top cushioning member is collapsed by attaching the lid, each secondary battery unit can be fixed almost equally between the bottom plate and the lid. Moreover, since each secondary battery unit is fixed under a certain pressure by collapsing the top cushioning member, each secondary battery unit will not move within the main body case even if there is vibration or impact. It can be firmly fixed.

In a preferred embodiment of the secondary battery device of the present invention, the main body case includes a partition wall that separates a battery housing space that accommodates a plurality of secondary battery units from a weight housing space on both sides of the battery housing space, and the weight housing space A weight member having a height lower than that of the plurality of secondary battery units is housed in each of the battery units, and the bottom plate is made of the same material as the weight member. According to this aspect, since the internal space of the main body case can be divided into the battery housing space and the weight housing space by the partition wall, the waterproof effect on the battery housing space can be enhanced. Furthermore, weight members having a lower height than the secondary battery unit 1 are provided on both sides of the pond storage space, and the bottom plate and the bottom plate 312 are made of the same material as the weight members, so that they can function as weights. Thereby, the center of gravity of the entire secondary battery device can be lowered and the weight balance can also be improved, so that it can be more stably fixed to the vehicle.

According to the present invention, displacement of the secondary battery can be effectively suppressed by increasing the holding power of the secondary battery by the frame, so that the effort of positioning the secondary battery can be reduced, and the battery film can be Damage can also be suppressed. Moreover, according to the invention, since the peripheral edge of the battery can be held while being exposed to the outside, damage to the battery due to thermal expansion can be prevented and safety can be improved.

1 is an external perspective view of a secondary battery unit according to a first embodiment. FIG. FIG. 2 is an exploded perspective view of the secondary battery unit of FIG. 1. FIG. 2 is a sectional view taken along line AA in FIG. 1. FIG. FIG. 4 is an enlarged cross-sectional view of one of the frames shown in FIG. 3; 2 is a sectional view taken along line BB in FIG. 1. FIG. FIG. 6 is a cross-sectional view when the frame body and batteries are increased in FIG. 5; FIG. 2 is an external perspective view showing an example of the configuration of a battery. FIG. 2 is a plan view showing an example of the configuration of a battery. It is a figure which looked at a frame from Z2 direction. It is a figure which looked at a frame from Z1 direction. It is an explanatory diagram showing a process before stacking and fixing the battery and the frame. It is an explanatory diagram showing a process after the battery and the frame are laminated and fixed. FIG. 7 is an external front view of a jump starter including a secondary battery unit according to a second embodiment. FIG. 14 is an external front view with the cables of FIG. 13 omitted. FIG. 15 is an exploded perspective view of the jump starter of FIG. 14. 16 is a diagram for explaining the arrangement of cables in FIG. 15. FIG. FIG. 7 is an external perspective view of a secondary battery device including a secondary battery unit according to a third embodiment. FIG. 18 is an exploded perspective view of the secondary battery device of FIG. 17, with the lid opened. FIG. 7 is a perspective view showing a secondary battery unit according to a third embodiment. 19 is a sectional view taken along the line CC in FIG. 18, showing a state before the lid is attached. FIG. 19 is a sectional view taken along the line CC in FIG. 18, showing the state after the lid is attached. FIG.

<First embodiment>
Hereinafter, a secondary battery unit 1 according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an external perspective view showing the configuration of a secondary battery unit 1 according to the first embodiment. FIG. 2 is an exploded perspective view of the secondary battery unit 1 of FIG. 1. 3 is a sectional view taken along the line AA in FIG. 1, and FIG. 4 is an enlarged sectional view of one frame 20 shown in FIG. FIG. 5 is a cross-sectional view taken along line BB in FIG. 1, and FIG. 6 is a cross-sectional view when the battery 10 and frame body 20 are added in FIG. Each of the X1-X2 direction, Y1-Y2 direction, and Z1-Z2 direction in each figure is orthogonal to the remaining two directions. In the following description, the X1-X2 direction is also referred to as the horizontal direction, the Y1-Y2 direction is also referred to as the vertical direction, and the Z1-Z2 direction is also referred to as the lamination direction.

As shown in FIGS. 1 and 2, the secondary battery unit 1 includes a battery holder 2 that holds a plurality of flat batteries 10 stacked in one direction (Z1-Z2 direction). The battery holder 2 includes a plurality of frames 20 that are arranged between the batteries 10 and hold the batteries 10 therebetween. As shown in FIGS. 3 and 5, each battery 10 is a chargeable and dischargeable lithium ion battery in which a power generation section 11 is covered with a film 12. As shown in FIG. 2, a pair of electrode tabs (a positive electrode tab 16a and a negative electrode tab 16b) are provided in the lateral direction of the battery 10. Note that the detailed configuration of the battery 10 will be described later.

As shown in FIGS. 1 to 3, the plurality of batteries 10 and the plurality of frames 20 are alternately stacked in the Z1-Z2 direction, which is the stacking direction of the batteries 10. FIG. 1 shows an example in which two batteries 10 (10A, 10B) with the same configuration and three frames 20 (frame 20A, frame 20B, frame 20C) with the same configuration are stacked. In the secondary battery unit 1 of FIG. 1, the positive electrode tab 16a of the battery 10B serves as a positive electrode, and the negative electrode tab 16b of the battery 10A serves as a negative electrode, so that electric power can be extracted from each of the batteries 10A and 10B. The number of batteries 10 and frames 20 is not limited to this. For example, as shown in FIG. 6, the number of batteries 10 and frames 20 can be increased in the stacking direction.

In FIG. 6, five frames 20 (20A, 20B, 20C, 20D, 20E) and four batteries 10 (10A, 10B, 10C, 10D) are alternately stacked. The four batteries 10 are each connected in series. In the secondary battery unit 1 of FIG. 6, the positive electrode tab 16a of the battery 10D serves as the positive electrode, and the negative electrode tab 16b of the battery 10A serves as the negative electrode, allowing power to be extracted from each of the batteries 10A to 10D.

As shown in FIGS. 1 and 2, a plurality of connecting portions 22a to 22f are provided on the outer surface of each frame 20 at intervals. By passing the bolts 4 through the through holes 222 of the connecting parts 22a to 22f and screwing them into the nuts 5, as shown in FIG. Can be joined with the two in between.

Each of the horizontal side surfaces of each frame 20 is provided with electrode arrangement parts 23a and 23b in which the electrode tabs (positive electrode tab 16a or negative electrode tab 16b) of the battery 10 are bent and arranged. As shown in FIGS. 2 and 5, the positive electrode tab 16a of the battery 10B and the negative electrode tab 16b of the battery 10A are stacked on the electrode placement portion 23a or the electrode placement portion 23b of the frame 20B, so that the batteries 10A and 10B can be separated. connected in series. A conductive plate 40 made of conductive metal is pressed against the overlapping portion of the positive electrode tab 16a and the negative electrode tab 16b and joined with bolts 42. A nut 43 that is screwed onto the bolt 42 can be attached to the frame 20 (see FIGS. 9 and 10, which will be described later). The bolt 42 and the nut 43 constitute a fastening member that joins the electrode tabs (positive electrode tab 16a, negative electrode tab 16b). The fastening member is not limited to this, and may be a screw or the like.

Note that the batteries 10A are stacked upside down so that the positions of the positive electrode tabs 16a and the negative electrode tabs 16b are reversed, and the positive electrode tabs 16a of the batteries 10A are stacked on the positive electrode tabs 16a of the batteries 10B in the electrode placement portion 23a of the frame 20B. If so, it will be connected in parallel. By changing the orientation of the batteries 10 in this way, they can be connected in series or in parallel.

The first surface 212 of each frame 20 in the stacking direction and the second surface 214 on the opposite side thereof become surfaces that come into contact with the peripheral edge portions 122 of the films 12 of adjacent batteries 10. As shown in FIGS. 2 and 4, convex portions 24a and 24b protruding from the first surface 212 in the Z2 direction are formed on the Y1 side and the Y2 side of the first surface 212, respectively. Recesses 25a and 25b, which are recessed from the second surface 214 in the Z2 direction, are formed on the Y1 and Y2 sides of the second surface 214, respectively, on opposite sides of the projections 24a and 24b. According to this, for example, as shown in FIG. 2, by sandwiching and stacking the film 12 of the battery 10A between the two frames 20A and 20B, the peripheral edge 122 of the film 12 of the battery 10A is placed on one side. It is held between the convex portions 24a, 24b of the frame body 20B and the concave portions 25a, 25b of the other frame body 20A. Thereby, the holding force of the battery can be increased, and displacement of the battery 10 with respect to the frame 20 can be suppressed.

Moreover, since the convex parts 24a and 24b of one frame body 20B push the peripheral edge part 122 of the film 12 of the battery 10A into the concave parts 25a and 25b of the other frame body 20A, as shown in FIGS. 1 and 2, the frame body The tip portions 123 of the peripheral portions 122 of the film 12 of the battery 10A that protrude from the battery 20A and the frame 20B in the vertical direction Y1 and Y2 can be bent in the Z1 direction (along the side surface of the frame 20B). According to this, even if the frame 20B is made so small that the tip 123 of the film 12 protrudes from the frame 20B, since the tip 123 is bent (fallen down), it will not get caught on wiring or the like and damage the wiring. can be suppressed.

Moreover, the stronger the tightening of the frame bodies 20A and 20B by the bolts 4 and nuts 5, the stronger the force that pinches the film 12 of the battery 10A. In this way, the bolt 4 and nut 5 of this embodiment constitute an adjustment member that adjusts the force that pinches the film 12. As the force for sandwiching the film 12 between the adjustment members is increased, the amount by which the convex portions 24a and 24b of one frame body 20B pushes the peripheral edge portion 122 of the film 12 into the concave portions 25a and 25b of the other frame body 20A increases, so that the battery 10 The holding force of the film 12 can be further strengthened, and the tip portion 123 of the film 12 can be bent more.

Furthermore, grooves 26a and 26b are formed in each of the frames 20A, 20B, and 20C, into which the tip portion 123 of the peripheral portion 122 of the film 12 of the battery 10 bent in the Z1 direction on the Y1 side and the Y2 side enters, as described above. ing. The bent tip portions 123 enter and are accommodated in the grooves 26a and 26b, respectively. This makes it difficult for the bent tip portion 123 to get caught on other wiring or the like.

Specifically, if we focus on the frame 20A, the battery 10A, and the frame 20B as shown in FIGS. 1 and 2, the frame 20A corresponds to the second frame, and the frame 20B corresponds to the first frame. Equivalent to. Then, the battery holder 2 holds the battery 10A with the peripheral edge 122 of the film 12 sandwiched between the frame 20A (second frame) and the frame 20B (first frame). Convex portions 24a and 24b are provided on the first surface 212 of the frame 20B (first frame) that comes into contact with the film 12 of the battery 10A so as to protrude toward the film 12 side. In the second surface 214 of the frame 20A (second frame) that contacts the film 12 of the battery 10A, there are recesses into which the convex parts 24a and 24b of the frame 20B (first frame) are inserted through the film 12, respectively. 25a and 25b are provided.

As shown in FIG. 11, which will be described later, the battery holder 2 has a Y1 edge portion 122 of the film 12 of the battery 10A that protrudes from the frame body 20A (second frame body) and the frame body 20B (first frame body) toward the Y1 side. By sandwiching the side edges between the convex portion 24a and the concave portion 25a, as shown in FIG. Can be kept exposed outside. In addition, the battery holder 2 has a peripheral edge 122 of the film 12 of the battery 10A that protrudes from the frame 20A (second frame) and the frame 20B (first frame) toward the Y2 side, as shown in FIG. 11, which will be described later. By sandwiching the side on the Y2 side between the convex portion 24b and the concave portion 25b, the bent peripheral portion 122 is bent into the frame body 20B (first frame body) as shown in FIG. 12, which will be described later. It can be held while being exposed outside.

Moreover, if attention is paid to the frame 20B, the battery 10B, and the frame 20C, the frame 20B corresponds to the second frame, and the frame 20C corresponds to the first frame. Then, the battery holder 2 holds the battery 10B with the peripheral edge 122 of the film 12 sandwiched between the frame 20B (second frame) and the frame 20C (first frame). Convex portions 24a and 24b are provided on the first surface 212 of the frame 20C (first frame) that comes into contact with the film 12 of the battery 10B so as to protrude toward the film 12 side. A recess into which the convex portions 24a and 24b of the frame 20C (first frame) are inserted through the film 12 is provided on the second surface 214 of the frame 20B (second frame) that contacts the film 12 of the battery 10B. 25a and 25b are provided.

As shown in FIG. 11, which will be described later, the battery holder 2 has a Y1 edge portion 122 of the film 12 of the battery 10B protruding from the frame body 20B (second frame body) and the frame body 20C (first frame body) toward the Y1 side. By sandwiching the side edges between the convex portion 24a and the concave portion 25a, as shown in FIG. Can be kept exposed outside. In addition, the battery holder 2 has a peripheral edge 122 of the film 12 of the battery 10B that protrudes from the frame 20B (second frame) and the frame 20C (first frame) toward the Y2 side, as shown in FIG. 11, which will be described later. By sandwiching the side on the Y2 side between the convex portion 24b and the concave portion 25b, the bent peripheral portion 122 becomes the frame body 20C (first frame body) as shown in FIG. 12, which will be described later. It can be held while being exposed outside. In this way, any adjacent frame body 20 among the many stacked frame bodies 20 corresponds to the first frame body and the second frame body, and is sandwiched between the first frame body and the second frame body. Battery 10 corresponds to a first battery.

Next, the battery 10 will be described in detail with reference to FIGS. 7 and 8. Note that since the battery 10A and the battery 10B have the same configuration, the battery 10 will be explained as a representative. FIGS. 7 and 8 are diagrams showing examples of battery configurations. FIG. 7 is an external perspective view of the battery 10, and FIG. 8 is a plan view of the battery 10 viewed from the stacking direction (Z1 direction). In FIG. 8, the frame body 20 is overlapped with dotted lines to make it easier to understand the state in which the frame body 20 is overlapped with the frame body 20. Note that the battery 10 in FIGS. 7 and 8 is the battery 10 before being held by the frame 20.

As shown in FIG. 7, the battery 10 includes a flexible film 12 (for example, a laminate film) that seals a power generation section 11 (see FIG. 3) and an electrolyte, and a pair of electrode tabs (a positive electrode tab 16a and a negative electrode tab). 16b). The power generation unit 11 is a laminated electrode in which positive electrode plates and negative electrode plates are alternately laminated with separators in between. This laminated electrode includes a positive current collector and a negative current collector, with the positive tab 16a being joined to the positive current collector, and the negative tab 16b being joined to the negative current collector. Note that the power generation section 11 does not need to be a laminated electrode, and may be a single layer electrode.

The film 12 seals the power generation part 11 and the electrolyte by arranging the power generation part 11 between a pair of rectangular laminate films, for example, and joining the peripheral edge part 122 of the film 12 by thermal welding. The film 12 includes a thin peripheral portion 122 joined by thermal welding, and a thick accommodating portion 124 surrounded by the peripheral portion 122 and containing the power generation section 11 and the electrolyte in a sealed state.

A positive electrode tab 16a and a negative electrode tab 16b extend from both sides of the peripheral portion 122 in the lateral direction (X1-X2 direction), respectively. In FIG. 7, the positive electrode tab 16a extends in the X1 direction from the X1 side of the peripheral edge 122, and the negative electrode tab 16b extends in the X2 direction from the X2 side of the peripheral edge 122. As shown in FIG. 7, the positive electrode tab 16a may be formed to be longer in the vertical direction (Y1-Y2 direction) than the negative electrode tab 16b. This makes it easier to distinguish between the positive electrode tab 16a and the negative electrode tab 16b. The positive electrode tab 16a and the negative electrode tab 16b are formed of metal foil such as Al, Cu, Ni, and Fe. The film 12 has a laminated structure including, for example, a resin layer and a metal layer.

Since the battery 10 in FIGS. 7 and 8 is the battery 10 before being held by the frame 20, the peripheral edge 122 of the film 12 is not bent, nor are the positive electrode tab 16a and the negative electrode tab 16b. When the batteries 10 are stacked on the frame 20 in this state, the thick accommodating portions 124 of the batteries 10 overlap so as to fit inside the openings 203 of the frame 20, as shown in FIG. On the other hand, the thin peripheral portion 122 of the battery 10 overlaps the first surface 212 or the second surface 214 of the frame body 20 except for a portion.

As shown in FIG. 8, the length of the frame 20 in the lateral direction (X1-X2 direction) is approximately the same as the length of the peripheral portion 122. According to this, only the positive electrode tab 16a and the negative electrode tab 16b protrude from the frame 20 without protruding from the frame 20 in the X1 direction and the X2 direction. By doing so, the positive electrode tab 16a or the negative electrode tab 16b can be bent and placed in the electrode placement portion 23a or the electrode placement portion 23b.

On the other hand, since the length of the frame 20 in the vertical direction (Y1-Y2 direction) is shorter than the peripheral edge 122 of the film 12, the peripheral edge 122 of the film 12 protrudes from the frame 20 in the Y1 direction and the Y2 direction. According to this, the frame body 20 can be made smaller in the vertical direction compared to a case where the length of the frame body 20 in the vertical direction is made long enough to include the peripheral edge part 122.

However, if the peripheral edge 122 of the film 12 protrudes from the frame 20, other wiring or cables are likely to be damaged by the tip 123 of the peripheral edge 122. In particular, since the peripheral edge 122 of the film 12 is a thin laminate film that is heat-sealed, its tip 123 is sharper and harder than the other parts, and wires and cables are easily damaged.

Furthermore, if the contact surface (first surface 212 or second surface 214) of the film 12 of the frame body 20 has no convex portions 24a and 24b and is, for example, a flat plane, the battery 10 is held against the frame body 20. It becomes easy to slip off. Since the surface of the laminate film is slippery, it tends to slip even if it is held in place by the frame 20 during work. Particularly when assembling a large number of batteries 10 by stacking them, if each battery 10 is misaligned, it takes time and effort to position the batteries 10 and join the electrode tabs (positive electrode tab 16a, negative electrode tab 16b). Moreover, since batteries thermally expand during charging and discharging, there is a possibility that they may become misaligned during use. If the battery 10 is misaligned with respect to the frame 20, depending on the amount of misalignment, the thick accommodating portion 124 (power generation section 11) of the battery 10 accommodated in the opening 203 of the frame 20 may be displaced from the frame 20. There is also a possibility that the film 12 may be damaged by rubbing against the edge of the inner surface 204, causing liquid leakage.

By the way, secondary batteries such as lithium ion batteries may generate heat and gas during charging and discharging, resulting in an increase in internal pressure and thermal expansion. An increase in pressure within a secondary battery can cause damage to the battery, so in pouch-type secondary batteries covered with a film, the pressure can be released from the periphery of the film. However, if the entire periphery of the battery is covered with two frames to prevent the periphery of the battery from protruding from the frame, there is no place for gas or pressure to escape, and the battery may be damaged.

Therefore, in this embodiment, as described above, each frame body 20 is provided with convex portions 24a, 24b and concave portions 25a, 25b, respectively, and two adjacent frame bodies 20 cover the peripheral edge portion 122 of the film 12 of the battery 10. By sandwiching and holding the battery 10 between the protrusions 24a, 24b and the recesses 25a, 25b, the holding power of the battery 10 by the frame 20 can be increased. Thereby, displacement of the battery 10 with respect to the frame 20 can be effectively suppressed.

Furthermore, since the protrusions 24a, 24b are inserted into the recesses 25a, 25b via the peripheral edge 122 of the battery 10, the peripheral edge 122 of the film 12 of the battery 10 is pushed into the recesses 25a, 25b. Thereby, the tip portion 123 of the peripheral edge portion 122 of the film 12 of the battery 10 protruding from the frame 20 can be bent while being exposed to the outside of the frame 20. According to this, the tip portion 123 of the peripheral portion 122 of the film 12 of the battery 10 protruding from the frame 20 can be prevented from damaging other wiring or the like.

Furthermore, according to such a configuration, rather than covering the peripheral edge part 122 of the film 12 of the battery 10 with the frame body 20 without exposing it to the outside of the frame body 20, it is rather actively exposed outside the frame body 20. By doing so, even if the battery 10 expands thermally, the peripheral edge 122 of the battery 10 is exposed to the outside, creating a place for gas and pressure to escape, so damage to the battery 10 due to thermal expansion can be effectively suppressed, making it safer. You can improve your sexuality.

Hereinafter, the structure of such a frame body 20 will be explained in detail with reference to FIGS. 9 and 10. Since the frames 20A, 20B, and 20C shown in FIG. 1 have the same configuration, the frame 20 will be explained as a representative. FIG. 9 is a diagram of the frame 20 viewed from the Z2 direction. FIG. 10 is a diagram of the frame 20 viewed from the Z1 direction on the opposite side from FIG.

The frame 20 shown in FIGS. 9 and 10 has a rectangular ring shape. In this embodiment, since a rectangular battery 10 is held, the shape of the frame 20 is also a rectangular ring shape, but is not limited to this. The frame 20 may be shaped to match the shape of the battery 10; for example, if the battery 10 has a circular or oval shape, the frame 20 may also be configured to have a circular or oval annular shape.

The opening 203 of the frame body 20 is configured such that the housing portion 124 of the battery 10 is housed inside the opening 203 . Six connecting portions 22a to 22f are provided on the outer surface 202 of the frame 20. The connecting portions 22a, 22b, and 22c are provided on the X1 side of the outer surface 202 so as to protrude in the X1 direction, and the connecting portions 22d, 22e, and 22f are provided on the X2 side of the outer surface 202 so as to protrude in the X2 direction. It is being

As shown in FIGS. 9 and 10, each of the connecting portions 22a to 22f has a through hole 222 through which the bolt 4 is inserted. A protruding portion 223 that protrudes in the Z2 direction is formed on the Z2 side, and an engaging portion 224 that is recessed in the Z1 direction is formed on the opposite Z1 side. The engaging portion 224 of the frame body 20 is adapted to engage with the protruding portion 223 of the adjacent frame body 20. When stacking a plurality of frames 20, the respective protrusions 223 facing each other are engaged with the respective engaging portions 224, thereby facilitating positioning of the frames 20 with respect to each other.

The through hole 222 is provided so as to penetrate from the engaging portion 224 to the protruding portion 223. Therefore, by passing the bolts 4 through the through holes 222 in the positioned state and screwing them into the nuts 5, the plurality of frames 20 can be fixed in the accurately positioned state. Thereby, the assembly work efficiency can be significantly improved compared to the case where the engaging portion 224 and the protruding portion 223 are not provided.

An electrode placement portion 23a is provided on the X1 side of the outer surface 202 of the frame 20 between the connecting portion 22a and the connecting portion 22b. On the X2 side of the outer surface 202 of the frame 20, an electrode placement portion 23b is provided between the connecting portion 22d and the connecting portion 22e. The electrode tabs (positive electrode tab 16a or negative electrode tab 16b) of the battery 10 are bent and placed in the electrode placement parts 23a and 23b. Thereby, the electrode tabs of adjacent batteries 10 can be arranged one on top of the other, so that the electrode tabs can be joined more compactly than when the electrode tabs are joined without bending.

Furthermore, if the direction of the battery 10 in the X1-X2 direction is reversed, both the positive electrode tab 16a and the negative electrode tab 16b can be overlapped, so that both series and parallel connections are possible. Specifically, if adjacent batteries 10 are oriented in the same direction in the X1-X2 direction and their positive electrode tabs 16a are overlapped, they can be connected in series (see FIGS. 5 and 6). On the other hand, if the X1-X2 directions of adjacent batteries 10 are reversed and the positive electrode tabs 16a and negative electrode tabs 16b are overlapped, they can be connected in parallel.

Specifically, for example, the frame 20B shown in FIG. 2 is a first frame, the frame 20A is a second frame, and the frame 20C is a third frame. The battery 10A sandwiched between the frame 20B (first frame) and the frame 20A (second frame) is the first battery, and the frame 20B (first frame) and the frame 20C (third Another battery 10B sandwiched between the battery and the frame (frame body) is referred to as a second battery.

At this time, the frame 20B (first frame) has a battery 10B (second battery) different from the battery 10A (first battery) and a frame 20C on the opposite side of the frame 20A (second frame). (third frame) are stacked. The electrode tab (positive electrode tab 16a) extended from the battery 10A (first battery) is bent toward the frame 20B (first frame) and attached to the electrode arrangement portion 23a of the frame 20B (first frame). Placed. The electrode tab (negative electrode tab 16b) extending from the battery 10B (second battery) is bent toward the frame 20B (first frame) side, and is connected to the electrode tab (positive electrode tab 16a) of the battery 10A (first battery). The electrodes are arranged in the electrode arrangement section 23a so as to overlap with each other. The overlapping portion of the electrode tab (positive electrode tab 16a) of the battery 10A (first battery) and the electrode tab (negative electrode tab 16b) of the battery 10B (second battery) is pressed against the electrode arrangement portion 23a by the conductive plate 40 and the bolt 42 They are joined using fastening members such as Similarly, an electrode tab (the positive electrode tab 16a or the negative electrode tab 16b) can be joined to the electrode arrangement portion 23b.

As shown in FIGS. 9 and 10, the electrode placement portions 23a and 23b of the frame 20 are provided with mounting holes 44 for mounting nuts 43 that are screwed onto the bolts 42 shown in FIG. 1 and the like. FIG. 9 illustrates a state in which the nut 43 is not attached, and FIG. 10 illustrates a state in which the nut 43 is attached. As shown in FIG. 10, the mounting hole 44 is formed in the second surface 214 on the Z1 side of the frame 20, and the nut 43 is mounted from the Z1 side of the frame 20. A through hole 41 penetrating from the side surface of the frame body 20 to the nut 43 is formed in the electrode placement portions 23a and 23b. The electrode tab (positive electrode tab 16a or negative electrode tab 16b) is joined by passing the bolt 42 through the through hole 41 and screwing it into the nut 43 (see FIG. 12). Note that, as shown in FIG. 9, a confirmation hole 45 may be formed in the first surface 212 on the Z2 side of the frame 20 to confirm whether the nut 43 is attached.

As shown in FIG. 9, convex portions 24a and 24b are formed on the first surface 212 of the frame 20 on the Z2 side. On the other hand, as shown in FIG. 10, recesses 25 (25a, 25b) are formed on the second surface 214 of the frame 20 on the Z1 side. The protrusions 24a, 24b and the recesses 25a, 25b are each formed to extend in the X1-X2 direction. 9 and 10, the convex portions 24a and 24b extend continuously from the end on the X1 side of the first surface 212 to the X2 side, and the concave portions 25a and 25b extend continuously from the end on the X1 side of the second surface 214 to the X2 side. Although the case where the convex portions 24a and 24b extend continuously to the X2 side is illustrated, the present invention is not limited to this, and a plurality of convex portions 24a and 24b may be provided from the end on the X1 side to the X2 side. In that case, a plurality of recesses 25a, 25b are provided in the same number as the protrusions 24a, 24b at positions facing the plurality of protrusions 24a, 24b.

According to such a configuration of the frame body 20, the peripheral edge portion 122 of the film 12 of the battery 10 can be sandwiched between the convex portions 24a, 24b and the concave portions 25a, 25b of the adjacent frame bodies 20. Thereby, the holding force of the battery 10 can be increased, so that displacement of the battery 10 with respect to the frame 20 can be suppressed. Furthermore, since the tip 123 of the peripheral edge 122 of the film 12 of the battery 10 can be deformed so as to be bent, damage to other wiring etc. can be suppressed.

Furthermore, as shown in FIG. 9, a groove 26a is formed at the outer edge of the frame 20 on the Y1 side, into which the tip 123 of the peripheral edge 122 of the film 12 of the battery 10 bent toward the frame 20 is inserted. Furthermore, a groove 26b is formed in the outer edge of the frame 20 on the Y2 side, into which the tip 123 of the peripheral edge 122 of the film 12 of the battery 10 bent toward the frame 20 is inserted.

Specifically, the groove portion 26a is formed at the outer edge (outer surface) of the frame 20 on the Y1 side, and the groove portion 26b is formed at the outer edge (outer surface) of the frame 20 on the Y2 side. The groove 26a is formed by cutting out the Y1 side of the outer edge (outer surface) of the frame 20 (including the Y1 side outer surface of the convex portion 24a) at a constant depth in the Z1 direction, and the groove 26b is It is formed by cutting out the Y2-side side (including the Y2-side outer surface of the convex portion 24b) of the outer edge (outer surface) of the convex portion 24b at a constant depth in the Z1 direction.

The depths of the grooves 26a and 26b are long enough to allow the tip 123 of the peripheral edge 122 of the film 12 of the battery 10 bent toward the frame 20 to fit therein. The groove portion 26a and the groove portion 26b are each formed continuously in the X1-X2 direction. According to this, the tip portion 123 of the peripheral edge portion 122 of the film 12 of the battery 10 bent toward the frame 20 side is housed entirely in the width direction (X1-X2 direction) in the groove portion 26a or the groove portion 26b. This makes it difficult for the bent tip portion 123 to get caught on other wiring or the like.

Note that the convex portions 24a, 24b and the recessed portions 25a, 25b are respectively arranged on the Y1 side and the Y2 side where the electrode placement portions 23a, 23b are not provided. That is, the convex portions 24a, 24b and the concave portions 25a, 25b are located at positions sandwiching the peripheral portion 122 of the battery 10 where the electrode tab (the positive electrode tab 16a or the negative electrode tab 16b) is absent. If the convex portions 24a, 24b and the concave portions 25a, 25b are provided at positions sandwiching the peripheral edge 122 where the electrode tab (positive electrode tab 16a or negative electrode tab 16b) is located, there is a possibility that even the electrode tab may be deformed or displaced. be. In this embodiment, by providing the convex portions 24a, 24b and the concave portions 25a, 25b at positions sandwiching the peripheral edge portion 122 where there is no electrode tab (positive electrode tab 16a or negative electrode tab 16b), it is possible to prevent the electrode tab from being displaced or deformed. Therefore, the holding power of the battery 10 can be increased.

Next, the assembly process of the secondary battery unit 1 of this embodiment will be explained with reference to FIGS. 11 and 12. FIG. 11 is an explanatory diagram showing a process before stacking and fixing the battery 10 and the frame 20. FIG. 3 is an explanatory diagram showing a process after the battery 10 and the frame body 20 are stacked and fixed. First, as shown in FIG. 11, a plurality of frames 20 (20A, 20B, 20C) and a plurality of batteries 10 (10A, 10B) are alternately stacked. At this time, the battery 10 is still in a state in which the peripheral edge 122 and the electrode tabs are not bent (see FIG. 7).

As shown in FIG. 12, in a state where the battery 10 and the frame body 20 are stacked, bolts 4 and nuts 5 are tightened to fix the frame bodies 20 to each other. Then, as shown in the enlarged view of section P in FIG. It is firmly fixed against the This increases the holding power of the battery 10 and effectively suppresses displacement of the battery 10 with respect to the frame 20. Therefore, the effort of positioning the battery 10 can be reduced, and damage to the film 12 of the battery 10 can also be suppressed.

Furthermore, by tightening the bolts 4 and nuts 5 as shown in FIG. can be bent. According to this, since the tip portion 123 protruding from the frame body 20 is bent (fallen down), it is possible to suppress damage to other wiring and the like. The further bent tip portion 123 enters and is accommodated in the groove portion 26a. This makes it difficult for the bent tip portion 123 to get caught on other wiring or the like.

In addition, as shown in FIG. 12, with the battery 10 and the frame body 20 stacked and fixed, the positive electrode tab 16a or the negative electrode tab 16b can be bent and placed in the electrode placement part 23a or the electrode placement part 23b, so that the overlapping positive electrode The conductive plate 40 is pressed against the tab 16a or the negative electrode tab 16b and joined with bolts 42. This allows the contact area of the positive electrode tab 16a or the negative electrode tab 16b to be increased compared to the case where the bolts 42 are tightened without using the conductive plate 40, thereby preventing a voltage drop.

The effects of the secondary battery unit 1 of the first embodiment will be explained by focusing on the frame 20B (first frame), the frame 20A (second frame), and the battery 10A held therein. do. According to the secondary battery unit 1 of the first embodiment, as shown in FIG. The peripheral edge 122 of the film 12 of the battery 10A is held, and the battery 10A is firmly fixed between the frame 20B (first frame) and the frame 20A (second frame). This increases the holding power of the battery 10A, and can effectively suppress misalignment of the battery 10A with respect to the frame 20B (first frame) and the frame 20A (second frame). Therefore, the effort of positioning the battery 10A can be reduced, and damage to the film 12 of the battery 10A can also be suppressed.

Moreover, as shown in FIG. 11, the peripheral edge 122 of the film 12 of the battery 10A protruding from the frame 20A (second frame) and the frame 20B (first frame) is removed from the frame 20B (first frame). By sandwiching the convex portion 24a of the frame 20A (second frame) and the recess 25a of the frame 20A (second frame), the peripheral edge 122 of the film 12 of the battery 10 bent into the frame 20B (first frame) as shown in FIG. can be held while being exposed outside the frame 20B (first frame). In this way, rather than covering the peripheral edge 122 of the film 12 of the battery 10 with the frame 20 without exposing it to the outside of the frame 20, the battery 10 is actively exposed outside the frame 20. Even when the battery expands thermally, the peripheral edge 122 of the battery 10 is exposed to the outside, creating a place for gas and pressure to escape, so damage to the battery due to thermal expansion can be effectively prevented and safety can be improved.

Further, according to the secondary battery unit 1 of the first embodiment, as shown in FIG. The outer edge of the frame 20B (first frame) is provided with a groove 26a that is accommodated while being exposed outside of the frame 20B (first frame). In this way, by providing the groove 26a on the outer edge of the frame 20B (first frame), the tip 123 of the peripheral edge 122 of the film 12 of the battery 10A bent toward the first frame is easily guided to the groove 26a. , making it easier to bend. Furthermore, since the tip 123 of the peripheral edge 122 of the film 12 of the battery 10A is accommodated in the groove 26a of the frame 20B (first frame), it is possible to prevent wires from getting caught in the tip 123. .

The effects of the secondary battery unit 1 of the first embodiment described above are based on the frame 20A (second frame), the frame 20B (first frame), and the battery 10A held therein. Although described above, the same effects as described above can be obtained with other stacked frames 20 and batteries 10. For example, among a large number of laminated frames 20, any adjacent frame 20 corresponds to the first frame and the second frame, and the battery 10 sandwiched between the first frame and the second frame This corresponds to the first battery. Further, the frame 20 adjacent to the second frame on the opposite side to the first frame corresponds to the third frame, and the battery 10 sandwiched between the second frame and the third frame corresponds to the third frame. Equivalent to 2 batteries. Furthermore, although the effects of the protrusions 24a, recesses 25a, and grooves 26a on the Y1 side of the frame 20 have been described above, the same effects also apply to the protrusions 24b, recesses 25b, and grooves 26b on the Y2 side of the frame 20. You can get

<Second embodiment>
A second embodiment of the present invention will be described. Components having substantially the same functional configuration in each of the embodiments illustrated below are designated by the same reference numerals and redundant explanation will be omitted. In the second embodiment, a jump starter including a secondary battery unit 1 according to the present invention is illustrated.

FIG. 13 is an external front view of a jump starter 100 including a secondary battery unit 1 according to the second embodiment. FIG. 14 is an external front view from which the cables (positive electrode cable 105a, negative electrode cable 105b) of FIG. 13 are omitted. FIG. 15 is an exploded perspective view of the jump starter 100 of FIG. 14. FIG. 16 is a diagram for explaining the arrangement of the cables (positive cable 105a, negative cable 105b) in FIG. 15. Q1 in FIG. 16 indicates the first cable outlet section 136a, and Q2 indicates the second cable outlet section 136b. Each of the X1-X2 direction, Y1-Y2 direction, and Z1-Z2 direction in each figure is orthogonal to the remaining two directions.

As shown in FIGS. 13 to 15, the jump starter 100 includes a main body 110 containing a secondary battery unit 1 including a plurality of chargeable and dischargeable batteries 10, and a pair of batteries led from inside the main body 110 to the outside. Power from the secondary battery unit 1 including the plurality of batteries 10 is output through the cables (positive cable 105a, negative cable 105b).

As shown in FIG. 15, the main body 110 is constructed by joining a front part 140A and a back part 140B with bolts or screws (not shown). The secondary battery unit 1 is arranged in an internal space formed by the front part 140A and the back part 140B. In the internal space of the main body 110, a part of the positive electrode cable 105a and the negative electrode cable 105b are fixed between the secondary battery unit 1 and the back surface part 140B.

As shown in FIG. 15, the secondary battery unit 1 of the second embodiment is similar to that shown in FIG. 10B, 10C, 10D) are alternately stacked. The four batteries 10 are each connected in series. In the secondary battery unit 1 of FIG. 15, a heat sink 50 and a circuit board 60 are stacked in this order on the Z1 side and fixed with bolts, screws, or the like. Note that the circuit board 60 is provided with electronic circuits, terminals, and the like, although not shown.

As shown in FIG. 16, the circuit board 60 is provided with a positive terminal Ta and a negative terminal Tb. The positive electrode terminal Ta is electrically connected to the positive electrode tab 16a of the battery 10D shown in FIG. The positive electrode terminal Ta is electrically connected to the negative electrode tab 16b of the battery 10A shown in FIG. The positive terminal Ta is electrically connected to a connecting terminal 106a provided at the base end of the positive cable 105a, and the negative terminal Tb is electrically connected to a connecting terminal 106b provided at the base end of the negative cable 105b.

As shown in FIG. 13, a positive electrode clip 104a is connected to the tip of the positive electrode cable 105a, and a negative electrode clip 104b is connected to the tip of the negative electrode cable 105b. In this way, the positive electrode of the secondary battery unit 1 is electrically connected to the positive electrode cable 105a, and the negative electrode of the secondary battery unit 1 is electrically connected to the negative electrode cable 105b. Therefore, power from the secondary battery unit 1 can be taken out from the positive clip 104a of the positive cable 105a and the negative clip 104b of the negative cable 105b.

As shown in FIG. 13, the positive electrode cable 105a and the positive electrode clip 104a are wound and stored in the positive electrode cable accommodating part 130a on the right side (X1 side) of the main body 110, and the negative electrode cable 105b is the negative electrode on the left side (X2 side) of the main body 110. It is attached to the cable accommodating part 130b. The positive cable accommodating part 130a and the negative cable accommodating part 130b have the same structure.

As shown in FIG. 14, the positive electrode cable accommodating portion 130a includes a pair of upper hook portions 132a and lower hook portions 133a provided on the upper and lower sides (Y1 side and Y2 side) of one side surface (X1 side) of the main body 110, respectively. A first protrusion 134a is provided below the upper hook 132a and protrudes from the side surface. The negative electrode cable accommodating portion 130b includes a pair of upper hook portions 132b and a lower hook portion 133b provided on the upper and lower sides (Y1 side and Y2 side) of the other side (X2 side) of the main body 110, and below the upper hook portion 132b. A second protrusion 134b is provided which is connected to and protrudes from the side surface.

As shown in FIG. 13, a handle 116 is provided on the top (Y1 side) of the main body 110, and an operation surface 114 covered with a lid 112 is provided on the front. The operation surface 114 is provided with operation buttons, lamps, etc. (not shown). The lid part 112 is attached to the front of the main body 110 so that the operation surface 114 can be opened and closed. The lid portion 112 is pivotally supported by a shaft 113 extending in the X1-X2 direction, and can open and close the operation surface 114 by rotating around the shaft 113. When in use, opening the lid 112 allows the buttons on the operation surface to be operated, and closing the lid 112 protects the operation surface 114. Note that the lid portion 112 may be made of, for example, transparent synthetic resin. As a result, the buttons, lamps, etc. on the operation surface can be seen through even when the lid part 112 is closed.

A lamp 115 may be provided on the front side of the main body 110. By providing the lamp 115 on the front, compared to the case where the lamp 115 is provided on the side of the main body 110, when the lamp 115 is illuminated, the operation surface 114 also becomes brighter, making it easier to operate the operation surface 114 even in the dark, increasing convenience. can.

One side surface (X1 side) of the main body 110 is provided with a first cable outlet section 136a between an upper hook section 132a and a lower hook section 133a, and the other side surface (X2 side) of the main body 110 is provided with an upper hook section. A second cable outlet portion 136b is provided between 132b and the lower hook portion 133b. The first cable outlet portion 136a and the second cable outlet portion 136b are provided on both sides (both side portions) of the main body 110 with the secondary battery unit 1 in between. A positive cable 105a and a negative cable 105b are pulled out from the first cable outlet part 136a and the second cable outlet part 136b, respectively. The positive cable 105a is fixed at the first cable outlet 136a, and the negative cable 105b is fixed at the second cable outlet 136b. In this way, the positive cable 105a and the negative cable 105b are each fixed at the cable outlet portions (the first cable outlet portion 136a and the second cable outlet portion 136b) extending from the inside of the main body 110 to the outside, so that the positive cable 105a And even if the negative electrode cable 105b is pulled from the outside, it can be made difficult to be pulled out.

Further, as described above, as shown in FIG. 16, the positive electrode cable 105a has its base end electrically connected to the positive electrode terminal Ta, and is routed around the outside of the secondary battery unit 1 to the first cable outlet. The negative electrode cable 105b extends from the main body 110 from 136a to the outside, and has a tip connected to the positive electrode clip 104a, a base end electrically connected to the negative electrode terminal Tb, and a tip connected to the secondary electrode in the opposite direction to the positive electrode cable 105a. The cable is routed around the outside of the battery unit 1 and extends to the outside of the main body 110 from the second cable outlet portion 136b, and is connected to the negative electrode clip 104b. According to this, inside the main body 110, the positive electrode cable 105a is routed around the outside of the secondary battery unit 1, and the negative electrode cable 105b is routed in the opposite direction to the positive electrode cable 105a. 105a and the negative electrode cable 105b can be made difficult to come off from the secondary battery unit 1 even if pulled from the outside.

Here, the waterproofing mechanism of the cable outlet section will be explained with reference to FIG. 16. A first waterproof mechanism 140a is provided at the first cable outlet section 136a, and a second waterproof mechanism 140b is provided at the second cable outlet section 136b. In FIG. 16, section Q1 indicates the first waterproof mechanism 140a, and section Q2 indicates the second waterproof mechanism 140b. Although FIG. 16 illustrates the configuration of the first waterproof mechanism 140a and the second waterproof mechanism 140b of the back section 140B, the first waterproof mechanism 140a and the second waterproof mechanism 140b having the same configuration are also provided facing each other in the front section 140A. It is being The first waterproof mechanism 140a and the second waterproof mechanism 140b have similar configurations. In FIG. 16, the first rubber member 144a and the second rubber member 144b are shown by dotted lines so that the inner structure of the first rubber member 144a and the second rubber member 144b can be easily seen.

As shown in part Q1 of FIG. 16, the first waterproofing mechanism 140a has a plurality of first chambers 142a that are partitioned by a plurality of first ribs 141a and open toward the front side 140A, and closes the openings of these first chambers 142a. The first rubber member 144a is arranged so as to As shown in part Q2 of FIG. 16, the second waterproofing mechanism 140b has a plurality of second chambers 142b that are partitioned by a plurality of second ribs 141b and open toward the front side 140A, and blocks the openings of these second chambers 142b. and a second rubber member 144b arranged so as to. A first waterproofing mechanism 140a and a second waterproofing mechanism 140b having a similar configuration are also provided in the front part 140A, and the positive electrode cable 105a connects the first rubber member 144a of the front part 140A and the first rubber member 144a of the back part 140B. The negative electrode cable 105b is sandwiched between the second rubber member 144b of the front part 140A and the second rubber member 144b of the back part 140B.

According to such a configuration, when the front part 140A and the back part 140B are joined, the positive electrode cable 105a is sandwiched and pressed between the first rubber member 144a of the front part 140A and the first rubber member 144a of the back part 140B. The negative electrode cable 105b is fixed to the first cable outlet part 136a in a state where it is held in place and is pressed between the second rubber member 144b of the front part 140A and the second rubber member 144b of the back part 140B. 136b. This increases the waterproof effect of the first cable outlet portion 136a and the second cable outlet portion 136b, and makes it difficult for liquids such as moisture to enter the main body 110. Even if liquid such as moisture enters the first cable outlet section 136a or the second cable outlet section 136b, it will first enter the plurality of first chambers 142a or second chambers 142b, so it is suppressed from entering the secondary battery unit 1. can. Thereby, short-circuiting of the battery 10 of the secondary battery unit 1 due to moisture or the like can be suppressed.

Further, the positive electrode cable 105a is firmly fixed by being sandwiched between the first rubber member 144a of the front part 140A and the back part 140B, and the negative electrode cable 105b is firmly fixed by being sandwiched between the second rubber member 144b of the front part 140A and the back part 140B. is fixed. This makes it difficult for the positive cable 105a and the negative cable 105b to be easily pulled out even if they are pulled from the outside. Therefore, it is possible to suppress the positive electrode cable 105a and the negative electrode cable 105b from coming off from the secondary battery unit 1. Thereby, the safety of the secondary battery unit 1 built into the jump starter 100 can be improved. Note that the method for fixing the positive electrode cable 105a and the negative electrode cable 105b is not limited to the above-mentioned method, but may be fixed more firmly by attaching ribs or wires inside the main body 110.

According to the jump starter 100 of the second embodiment, since the secondary battery unit 1 similar to that of the first embodiment is built-in, the same effects as those of the first embodiment can be obtained. For example, even if the jump starter 100 is subjected to vibration or shock, the film 12 of the battery 10 of the battery 10 of the secondary battery unit 1 is firmly fixed by the convex portions 24a, 24b and the concave portions 25a, 25b of the frame 20. Therefore, the battery 10 is prevented from being misaligned with respect to the frame 20, and damage to the film 12 and liquid leakage can be suppressed.

When starting the engine by connecting the jump starter 100 to a dead car battery, etc., pull out the positive electrode clip 104a and the negative electrode clip 104b from the main body 110, and connect them to the positive and negative terminals of the battery (not shown), respectively. Connecting. The user opens the lid 112 and operates the power button (not shown) on the operation surface 114 to supply power from the secondary battery unit 1 to the battery.

After use, the first protrusion 134a on the X1 side of the main body 110 is sandwiched between the positive electrode clip 104a, and the positive electrode cable 105a is wound around the upper hook portion 132a and the lower hook portion 133a to connect the positive electrode clip 104a and the positive electrode cable 105a. It can be stored compactly on the right side (X1 side) of the main body 110. In addition, by sandwiching the second projection 134b on the X2 side of the main body 110 between the negative electrode clips 104b and winding the negative electrode cable 105b around the upper hook portion 132b and the lower hook portion 133b, the negative electrode clip 104b and the negative electrode cable 105b are connected to the main body 110. It can be stored compactly on the left side (X2 side).

<Third embodiment>
A third embodiment of the present invention will be described. In the second embodiment, a case is illustrated in which one secondary battery unit 1 is provided, but in the third embodiment, a secondary battery device including a plurality of secondary battery units 1 is illustrated. FIG. 17 is an external perspective view of a secondary battery device 300 according to the third embodiment. In FIG. 17, a schematic internal configuration of the secondary battery device 300 is shown by dotted lines. In the secondary battery unit 1 of the third embodiment, the battery 10 and the frame 20 are arranged vertically, so in FIGS. 17 to 21 below, the Z1-Z2 direction (stacking direction) is the vertical direction, and the Y1- The explanation will be made with the Y2 direction (vertical direction) as the depth direction.

As shown in FIG. 17, the secondary battery device 300 includes a main body case 310 that accommodates a plurality of secondary battery units 1 (six units are illustrated in FIG. 17) and a plurality of weight members 330 (two units in FIG. 17). . The main body case 310 has a substantially rectangular box shape and includes a bottom plate 312, side plates 314, and a lid portion 320. The side plate 314 is constructed by integrating a front plate, a rear plate, a right side plate, and a left side plate. The opening on the lower surface of the side plate 314 is closed by the bottom plate 312, and the opening on the upper surface is closed by the lid part 320. The side plate 314 is attached to the side surface of the bottom plate 312 so as to surround the bottom plate 312. Note that the configurations of the bottom plate 312 and the side plates 314 are not limited to this. For example, the side plate 314 may be configured by separately attaching a front plate, a rear plate, a right side plate, and a left side plate.

The weight member 330 is made of metal such as iron. By adjusting the heights of the left and right weight members 330, the left and right weight balance can be adjusted. The bottom plate 312 may also be made of the same material as the weight member 330 to function as a weight. In this case, by changing the thickness of the bottom plate 312, the weight can be adjusted without changing the overall gravity balance.

Six secondary battery units 1 are arranged side by side on the bottom plate 312. FIG. 17 exemplifies a case where three secondary battery units 1 are arranged in two rows in the vertical direction (Y1-Y2 direction), three each in the horizontal direction (X1-X2 direction). Each secondary battery unit 1 is electrically connected by wiring (not shown). Depending on how the secondary battery units 1 are connected, it is possible to connect them not only in series or in parallel, but also in a combination of series and parallel. The number and arrangement of secondary battery units 1 are not limited to those shown in the drawings. On the bottom plate 312, one weight member 330 is disposed on each side of the six secondary battery units 1 in the lateral direction (X1 direction and X2 direction).

The lid portion 320 includes an upper plate 322 and a hakama portion 324 that hangs down from the outer peripheral edge of the upper plate 322. The lid part 320 is attached to the side plate 314 so that the upper plate 322 and the hakama part 324 cover the upper part of the side plate 314. Since the outer peripheral side surface of the upper part of the side plate 314 overlaps with the hakama part 324, the strength of the main body case 310 can be increased. Note that the configuration of the lid portion 320 is not limited to this, and may be configured only with the upper plate 322 without providing the hakama portion 324, for example.

In addition, as shown in FIG. 1, the lid part 320 may be provided with a hook hole 328 for inserting a hook for transportation into the hakama part 324. The lid portion 320 of this embodiment is provided with a total of four hook holes 328, two on the Y1 side and two on the Y2 side. As shown in FIG. 21, the side plate 314 is also provided with four hook holes 318. When the lid part 320 is attached as shown in FIG. 21, the four hook holes 328 of the lid part 320 and the four hook holes 318 of the side plate 314 are provided facing each other so as to overlap with each other. Thereby, when the lid part 320 is attached, the hook hole 318 of the side plate 314 and the hook hole 328 of the lid part 320 communicate with each other, making it easier to insert the hook.

Next, the internal configuration of the secondary battery device 300 will be described in more detail with reference to FIG. 18. FIG. 18 is an exploded perspective view of the secondary battery device 300 of FIG. 17, with the lid 320 opened. In FIG. 18, the main body case 310 is made transparent to make it easier to see the inside. As shown in FIG. 18, partition walls 315 are provided between the six secondary battery units 1 and the two weight members 330, respectively. These two partition walls 315 divide the internal space of the main body case 310 into a battery housing space 310A and weight housing spaces 310B on both sides thereof. A sealing frame 325 is attached to the lid portion 320 below the top plate 322 to seal the battery housing space 310A. The sealing frame 325 is made of a rubber member or the like.

An L-shaped locking portion 316 is attached to the upper part of the partition wall 315, and the locking portion 316 is provided with a screw hole P into which a screw 326 for fixing the lid portion 320 is screwed. Thereby, the upper surface opening of the side plate 314 can be closed with the lid part 320 and fixed with the screws 326. By fixing the lid part 320 to the locking part 316 of the partition wall 315 with the screw 326, the sealing frame body 325 is pressed against the upper surfaces of the two partition walls 315 and a part of the side plate 314 that form the battery housing space 310A. The battery housing space 310A is sealed. This enhances the waterproofing effect and prevents liquid such as moisture from entering the battery housing space 310A. In this case, a safety valve 317 may be provided in the partition wall 315 to prevent the pressure from increasing in the battery housing space 310A. Note that the partition wall 315 is provided with a wiring through hole 319 for leading the wiring to the outside of the battery housing space 310A. The wiring through hole 319 may also have a waterproof function.

Six secondary battery units 1 are housed in the battery housing space 310A of the main body case 310. Side buffer members 341 are attached to the side surfaces of each secondary battery unit 1 in all directions, one above and one below. A bottom cushioning member 342 is provided on the bottom of each secondary battery unit 1. A top buffer member 343 is provided on the top surface of each secondary battery unit 1 . As a result, the side part of each secondary battery unit 1 is fixed by the side buffer member 341, the bottom part of each secondary battery unit 1 is fixed to the bottom plate 312 by the bottom buffer member 342, and each secondary battery unit 1 is fixed by the top buffer member 343. The upper part of the unit 1 is fixed to the lid part 320.

A circuit board 344 and a handle 345 (handle) are provided on the top of each secondary battery unit 1. The circuit board 344 is fixed with screws (not shown) via a heat sink (not shown). Although not shown, a plurality of electronic components, terminals, etc. are mounted on the circuit board 344. Although not shown in the drawings, each secondary battery unit 1 is provided with a plurality of connection wirings, connection terminals, and the like. In FIG. 18, each secondary battery unit 1 is provided with two handles 345, and an upper surface buffer member 343 is provided on one of the handles 345. Although not shown, the other handle 345 may be provided with a connection terminal (connector) or the like.

Here, such a secondary battery unit 1 will be specifically explained with reference to FIG. 19. FIG. 19 is a perspective view showing the configuration of one secondary battery unit 1 shown in FIG. 18. Although the six secondary battery units 1 in FIG. 18 are arranged in different directions, they have substantially the same configuration, so one secondary battery unit 1 will be described here as a representative. Note that in FIG. 19, the circuit board 344 and the like are omitted.

As shown in FIG. 19, the secondary battery unit 1 of the third embodiment exemplifies a case where a larger number of batteries 10 are stacked than in the second embodiment, with the vertical direction in FIG. 19 as the stacking direction (Z1-Z2 direction). do. A case where 30 batteries 10 and 31 frames 20 are alternately stacked is illustrated. However, the number of stacked batteries 10 and frames 20 is not limited to this. In the third embodiment, a high-capacity secondary battery device 300 is configured by electrically connecting six units having the same configuration as the secondary battery unit 1.

The individual batteries 10 of the secondary battery unit 1 in FIG. 19 may be connected in series, in parallel, or in a combination of series and parallel. In the case of series and parallel combinations, as shown in FIG. 19, the conductive plates 40 of the electrode tabs (positive electrode tab 16a, negative electrode tab 16b) may be of a size that is attached to one frame 20; A size that covers a plurality of frames 20 may also be used. For example, in FIG. 19, the conductive plate 40A is sized to be attached to one frame 20, and the conductive plate 40B is sized to cover three frames 20. According to the conductive plate 40B, the electrode tabs of alternately stacked batteries 10 can be connected to each other, and the electrode tabs of adjacent batteries 10 can also be connected to each other. By combining such a conductive plate 40A and a conductive plate 40B, variations in the connection method of electrode tabs can be expanded.

Specifically, for example, according to the conductive plate 40A, one frame 20 may be connected in series with the positive electrode tabs 16a and negative electrode tabs 16b of the batteries 10 arranged above and below, or the positive electrode tabs 16a may be connected to each other or the negative electrode tabs may be connected in series. 16b can also be connected in parallel. Further, according to the conductive plate 40B, when paying attention to the three stacked frames 20, the positive electrode tabs 16a of the batteries 10 adjacent to each other above and below the first frame 20 are connected in parallel. , to the third frame 20, the negative electrode tabs 16b of the batteries 10 arranged above and below are connected in parallel, and the positive electrode tabs 16a and the negative electrode tabs 16b are connected in series by a conductive plate 40B. You can also do that. According to this, wiring in which two series systems are connected in parallel in one secondary battery unit 1 is also possible.

As shown in FIG. 19, a plurality of handles 345 (handles) are provided at the top of the secondary battery unit 1. In the third embodiment, a case is illustrated in which two handles 345 are provided in each secondary battery unit 1 side by side in the vertical direction (Y1-Y2 direction). Note that the number of handles 345 is not limited to what is illustrated. In FIG. 19, the bolt 4 for joining the frame 20 of the secondary battery unit 1 is extended and the handle 345 is attached. According to this, it becomes easier to lift the secondary battery unit 1 more stably than when a handle is attached to the top surface of the secondary battery unit 1.

The above-mentioned upper surface buffer member 343 is provided on the upper surface of the handle 345. In FIG. 19, a case is illustrated in which a top buffer member 343 is provided on the top surface of one handle 345 (Y1 side). Note that the upper surface buffer member 343 may be provided on each of the plurality of handles 345. In this way, by separately providing the buffer members (side buffer member 341, bottom buffer member 342, and top buffer member 343) in each secondary battery unit 1, a common buffer member is provided in each secondary battery unit 1. Compared to the above, each of the secondary battery units 1 can be firmly fixed. Moreover, by providing the top buffer member 343 on the top surface of the handle 345 located at the top of each secondary battery unit, the size of the top buffer member 343 (especially the size in the height direction) can be suppressed.

FIG. 18 exemplifies a case where the secondary battery units 1 of FIG. 19 are arranged in two rows of three each in the horizontal direction (X1-X2 direction). The three secondary battery units 1 on the Y1 side are arranged so that the top buffer member 343 is arranged on the Y1 side, and the three secondary battery units 1 on the Y2 side are arranged so that the top buffer member 343 is arranged on the Y2 side. Arrange them as shown. That is, the three secondary battery units 1 on the Y1 side and the three secondary battery units 1 on the Y2 side are aligned with respect to a plane including the horizontal direction (X1-X2 direction) and the stacking direction (Z1-Z2 direction). Arranged symmetrically. As a result, the six upper surface buffer members 343 are arranged in three rows along the X1-X2 direction on both sides of the Y1 side and the Y2 side of the side plate 314, so that they are arranged almost equally in the battery storage space 310A. By attaching the lid part 320, the six top buffer members 343 are collapsed in the height direction (Z1-Z2 direction), and each secondary battery unit 1 is almost evenly spaced between the bottom plate 312 and the lid part 320. It can be fixed to

Here, the effects when fixing each secondary battery unit 1 to the main body case 310 will be described with reference to FIGS. 20 and 21. FIG. 20 is a cross-sectional view taken along the line CC in FIG. 18, showing the state before the lid part 320 is attached. FIG. 21 is a sectional view taken along the line CC in FIG. 18, showing the state after the lid part 320 is attached. As shown in FIG. 20, when six secondary battery units 1 are accommodated in the battery housing space 310A of the main body case 310, the side surface of each secondary battery unit 1 is fixed by the side buffer member 341.

As shown in FIG. 20, the height (dimension in the Z1-Z2 direction) of the six top buffer members 343 before the lid part 320 is attached is preferably higher than the top surface of the side plate 314. In FIG. 20, the top buffer member 343 protrudes above the top surface of the side plate 314 by a height h. With this configuration, when the lid portion 320 is attached and fixed with the screws 326 as shown in FIG. 21, the height h portions of the six top buffer members 343 are collapsed. Therefore, each of the six secondary battery units 1 is fixed in the Z1-Z2 direction while a constant pressure is applied by each upper surface buffer member 343. Thereby, each secondary battery unit 1 can be securely fixed so that it does not move within the main body case 310 even if there is vibration or impact.

According to the secondary battery device 300 according to the third embodiment, by arranging and electrically connecting a plurality of secondary battery units 1 in which a large number of batteries 10 and frames 20 are stacked, large current and A high-capacity secondary battery can be constructed. Thereby, the secondary battery device 300 can be used as a power source for a travel motor of an electric vehicle or a hybrid vehicle.

Furthermore, by providing buffer members (side buffer member 341, bottom buffer member 342, and top buffer member 343) in the plurality of secondary battery units 1, a secondary battery that is resistant to vibration and impact can be configured. In particular, by attaching the lid portion 320 with the top buffer member 343 of the secondary battery unit 1 in a collapsed state, each secondary battery unit 1 can be fixed separately with a constant pressure. Moreover, the effect of the laminated structure of the frame 20 similar to that of the secondary battery unit 1 of the first embodiment makes it possible to suppress misalignment of each of the many individual batteries 10, so that a secondary battery that is extremely resistant to vibrations can be constructed. Therefore, it can also be used as a power source for drive motors of industrial vehicles such as forklifts and shovel loaders, which vibrate more strongly than passenger cars, and can effectively suppress battery damage caused by vibration.

Further, a weight member 330 having a lower height than the secondary battery unit 1 is provided on both sides of the battery housing space 310A, and the bottom plate 312 is also made of the same material as the weight member 330, so that it can function as a weight. Thereby, the center of gravity of the entire secondary battery device can be lowered and the weight balance can also be improved, so that it can be more stably fixed to the vehicle.

<Modified example>
The present invention is not limited to the embodiments described above, and various applications and modifications, such as those described below, are possible. Moreover, it is also possible to suitably combine one or more arbitrarily selected aspects of these modifications and each of the embodiments described above. Furthermore, it is obvious that those skilled in the art can come up with various changes and modifications within the scope of the claims, and these naturally fall within the technical scope of the present invention. It is understood that

For example, in the above embodiment, a case is illustrated in which the plurality of frames 20 are fixed with bolts 4 and nuts 5, but the invention is not limited to this, and they may be fixed with other fastening members such as screws, or fixed with adhesive. You may also do so. Further, in the above embodiment, the case where the electrode tabs (positive electrode tab 16a, negative electrode tab 16b) are joined by bolts 42 and nuts 43 is illustrated, but the invention is not limited to this, and they may be joined by welding or the like. Various welding methods such as ultrasonic welding and laser welding are possible.

DESCRIPTION OF SYMBOLS 1... Secondary battery unit, 2... Battery holder, 4... Bolt, 5... Nut, 10 (10A to 10D)... Battery, 11... Power generation part, 12... Film, 122... Peripheral part, 123... Tip part, 124 ...accommodating part, 16a...positive electrode tab, 16b...negative electrode tab, 20 (20A to 20C)...frame body, 202...outer surface, 203...opening, 204...inner surface, 212...first surface, 214...second surface , 22a to 22f...Connection part, 222...Through hole, 223...Protrusion part, 224...Engaging part, 23a, 23b...Electrode placement part, 24a, 24b...Convex part, 25a, 25b...Recessed part, 26a, 26b...Groove part , 40 (40A, 40B)... Conductive plate, 41... Through hole, 42... Bolt, 43... Nut, 44... Mounting hole, 45... Confirmation hole, 50... Heat sink, 60... Circuit board, 100... Jump starter, 104a ...Positive electrode clip, 104b...Negative electrode clip, 105a...Positive electrode cable, 105b...Negative electrode cable, 106a...Connection terminal, 106b...Connection terminal, 110...Main body, 112...Lid part, 113...Shaft, 114...Operation surface, 115...Lamp , 116...Handle, 130a...Positive cable housing part, 130b...Negative cable housing part, 132a...Upper hook part, 133a...Lower hook part, 132b...Upper hook part, 132b...Lower hook part, 134a...First protrusion 134b...Second projection part, 136a...First cable outlet part, 136b...Second cable outlet part, 140A...Front part, 140B...Back part, 140a...First waterproof mechanism, 140b...Second waterproof mechanism, 141a ...First rib, 141b...Second rib, 142a...First chamber, 142b...Second chamber, 144a...First rubber member, 144b...Second rubber member, 300...Secondary battery device, 310...Main case, 310A ...Battery accommodation space, 310B...Accommodation space, 312...Bottom plate, 314...Side plate, 315...Partition wall, 316...Locking part, 317...Safety valve, 318...Hook hole, 319...Wiring through hole, 320...Lid part, 322... Upper plate, 324... Hakama portion, 325... Sealing frame, 326... Screw, 328... Hook hole, 330... Weight member, 341... Side buffer member, 342... Bottom buffer member, 343... Top buffer member, 344... Circuit Board, 345... Handle, A... Second frame, P... Screw hole, Ta... Positive electrode terminal, Tb... Negative electrode terminal.

Claims (10)

A secondary battery unit that holds a chargeable and dischargeable battery whose power generation part is covered with a film,
a battery holder having at least a first frame body and a second frame body, and holding the battery with a peripheral edge of a film of the battery sandwiched between the first frame body and the second frame body;
a convex portion provided on a first surface of the first frame that comes into contact with the film of the battery so as to protrude toward the film;
a recess into which the convex portion is inserted through the film on a second surface of the second frame that comes into contact with the film of the battery;
an adjusting member that adjusts the force that pinches the film ,
The battery holder is arranged so that the peripheral edge of the battery film protruding from the first frame and the second frame is sandwiched between the convex part and the concave part, so that the battery holder is bent toward the first frame. A secondary battery unit that is held with its peripheral portion exposed outside the first frame. 2. The secondary battery unit according to claim 1, wherein the outer edge of the first frame is provided with a groove for accommodating the tip of the peripheral edge bent toward the first frame while leaving it exposed outside the first frame. The battery includes a pair of electrode tabs extending from a peripheral edge of the film,
An electrode arrangement portion is provided on the outer surface of the first frame, in which one or the other of the electrode tabs protruding from the first frame is bent and arranged;
3. The secondary battery unit according to claim 1, wherein the convex portion of the first frame and the concave portion of the second frame are positioned to sandwich the peripheral portion where the film of the battery does not have an electrode tab. A battery different from the battery and a third frame are stacked on the first frame on the opposite side of the second frame,
The battery sandwiched between the first frame body and the second frame body is referred to as a first battery, and the another battery sandwiched between the first frame body and the third frame body is referred to as a second battery. Then,
The first battery and the second battery include a pair of electrode tabs extending from the peripheral edge of the film,
One or the other of the electrode tabs of the first battery protruding from the first frame is bent and placed in the electrode placement part,
One or the other of the electrode tabs of the second battery protruding from the first frame is bent and arranged in the electrode placement part so as to overlap the electrode tabs of the first battery,
A conductive plate is pressed against the overlapping portion of the electrode tab of the first battery and the electrode tab of the second battery, and the conductive plate and the electrode tab are joined to the electrode arrangement portion by a fastening member.
The secondary battery unit according to claim 3 . The secondary battery unit according to any one of claims 1 to 4, which is provided inside the main body;
comprising a positive electrode cable and a negative electrode cable that are routed from the inside of the main body to the outside and output power from the secondary battery unit,
The positive electrode cable is fixed at a first cable outlet extending from the inside of the main body to the outside,
In the jump starter, the negative electrode cable is fixed at a second cable outlet extending from the inside of the main body to the outside. The secondary battery unit includes a circuit board provided with a positive terminal connected to the positive electrode of the battery and a negative terminal connected to the negative electrode of the battery,
The first cable outlet part and the second cable outlet part are respectively provided on both sides of the main body with the secondary battery unit in between,
The positive electrode cable has a base end electrically connected to the positive electrode terminal, is routed around the outside of the secondary battery unit, extends outside the main body from the first cable outlet, and has a distal end. is connected to the positive clip,
The negative electrode cable has a base end electrically connected to the negative electrode terminal, and is routed around the outside of the secondary battery unit in a direction opposite to that of the positive electrode cable, and is connected to the main body from the second cable exit portion. The jump starter according to claim 5, wherein the jump starter extends outside and has a tip connected to the negative electrode clip. A first waterproofing mechanism is provided at the first cable outlet,
The first waterproof mechanism is
a plurality of first ribs forming a plurality of first chambers;
a rubber member provided between the plurality of first ribs and the positive electrode cable to close the plurality of first chambers and fix the positive electrode cable;
A second waterproofing mechanism is provided at the second cable outlet,
a plurality of second ribs forming a plurality of second chambers;
7. The jump according to claim 5, further comprising a rubber member provided between the plurality of second ribs and the negative electrode cable to close the plurality of second chambers and fix the negative electrode cable. starter. A main body case accommodating a plurality of secondary battery units according to any one of claims 1 to 4;
a buffer member provided in each of the secondary battery units;
A handle provided on each of the secondary battery units,
The main case includes a side plate, a bottom plate that closes an opening on the bottom of the side plate, and a lid that closes an opening on the top of the side plate,
In the secondary battery device, the buffer member includes a top buffer member provided on the top surface of the handle. The height of the top buffer member is higher than the top surface of the side plate,
The secondary battery device according to claim 8, wherein the secondary battery unit is fixed to the main body case by collapsing the top buffer member when the lid portion is attached to the side plate. The main body case includes a partition wall that separates a battery storage space that accommodates the plurality of secondary battery units and a weight storage space on both sides of the battery storage space,
A weight member having a lower height than the plurality of secondary battery units is accommodated in each of the weight accommodation spaces,
The secondary battery device according to claim 8 or 9, wherein the bottom plate is made of the same material as the weight member.

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