JP7055578B2 - Battery fixture for battery power supply - Google Patents

Description

The present invention relates to a battery fixture of a battery power supply used in a work place without a power source, particularly in an indoor work place where an engine generator cannot be used due to insufficient ventilation.

When an engine generator is used in an indoor work place where ventilation is insufficient, the exhaust gas of the engine fills the surroundings and the workers are injured. When a power source is required in such a workplace, a battery power supply device in which a plurality of batteries and an inverter are housed in a housing is used instead of the engine generator. Further, such a battery power supply device is required to be smaller and lighter in order to improve convenience, such as being able to be carried by one person at a work site.

Further, it is necessary to make it possible to easily perform wiring work for electrically connecting a plurality of batteries housed in a housing while reducing the size and weight. Therefore, we have previously proposed a technique related to "battery unit of a battery power supply device" as Japanese Patent Application No. 2019-79171.

The battery unit is assembled as shown in FIG. First, as shown in FIG. 14 (A), a plurality of batteries 1 (for example, three) having a rectangular parallelepiped outer shape and having two positive and negative terminals at the longitudinal end of one surface thereof, and an upper surface having terminals 1a and 1b. Aligning the terminals 1a and 1b on the same side and arranging them in parallel to form the battery group BG-1. Then, the terminals 1a and 1b of each battery 1 are connected in series, and the positive and negative connection lines 4a and 4b are drawn out on one side.

As shown in FIG. 14B, the first battery group BG-1 is arranged with the side with the terminals 1a and 1b facing up, and the side opposite to the end on the side with the terminals 1a and 1b. Similar to the above, another battery group BG-2 in which terminals 1a and 1b of each battery 1 are connected in series and positive and negative connection lines 4a and 4b are drawn out on one side has terminals 1a and 1b on the upper surface. Place the battery group BG-1 with the side end facing down and the side with the terminals 1a and 1b facing the terminals 1a and 1b of the first battery group BG-1. When the second battery group BG-2 is placed on the first battery group BG-1, the second battery group BG-2 is the terminals 1a, 1b of the first battery group BG-1. It is necessary to determine the relationship between the length and the height of the battery 1 so that the terminals 1a and 1b are exposed without covering the top.

Next, as shown in FIG. 14C, the terminals 1a and 1b of the first battery group BG-1 arranged first are located on the end faces of the terminals 1a and 1b of the first battery group BG-1 on the side where the terminals 1a and 1b are located. The surface of the other battery group BG-3 from which the positive and negative connection lines 4a and 4b are drawn out in series with the terminals 1a and 1b on one side, and the end on the side with the terminals 1a and 1b above. And make contact. A recess 1c is provided on the back surface of each of the batteries 1, 1, 1 of the third battery group BG-3, and the recess 1c is provided in all the batteries 1 due to the necessity in the manufacturing process of the battery 1. It is provided.

Then, as shown in FIG. 14D, the surface where the terminals 1a and 1b of the second battery group BG-2 are located and the end surface where the terminals 1a and 1b of the third battery group BG-3 are located are In the meantime, similarly to the above, another set of battery group BG-4 in which the terminals 1a and 1b of each battery 1 are connected in series and the positive and negative connection lines 4a and 4b are pulled out on one side is connected to the terminals 1a and 1b. The side with terminals 1a and 1b is arranged so that the side with terminals 1a and 1b is on the side with the second battery group BG-2.

In this way, the first to fourth battery groups are combined to form one battery assembly BA, and the terminals of the respective battery groups are exposed in the central portion surrounded by each battery group, and these are exposed. The space portion 3 is formed so as to include the connecting lines 4a and 4b to be connected. The connection lines 4a and 4b are individually insulated, and are further bundled separately for positive and negative, and two wiring bundles 4 are drawn out from one opening of the space portion 3. The combination order of the first to fourth battery groups does not necessarily have to be as described above, and may be finally as shown in FIG. 14 (D).

Finally, the rectangular frame-shaped fixing band F is fitted from the upper side of the battery assembly BA, and the upper batteries 1, 1, 1 ... Are fixed together. At that time, the fixed band F is fitted by using the draft of the battery 1 described later. By fixing the second battery group BG-2 and the fourth battery group BG-4 located at the upper stage of the battery assembly BA in this way, the second battery group BG-2 and the fourth battery group BG can be fixed. -4 is integrated and can prevent falling.

The fixed band F is formed in a rectangular frame shape, and an elongated metal plate is bent to form a rectangular frame shape, and the ends thereof are connected by welding. At that time, for example, an iron plate having a thickness of 1 mm and a width of 10 mm is used as the metal plate, and the inner peripheral dimension is set so that the metal plate stops at the intermediate portion between the second battery group BG-2 and the fourth battery group BG-4.

Further, the wiring bundle 4 pulled out from the space portion 3 has a terminal crimped to the end portion, and the terminal is inserted into one connector of the connector 5 to be connected. Then, by connecting the output cable 6 to the other connector of the connector 5 and connecting both connectors of the connector 5, the wiring from the battery assembly BA and the output cable 6 are connected. It is connected to an inverter unit provided outside the battery unit via the output cable 6.

In this battery unit, a rectangular frame-shaped fixed band F is fitted from the upper side of the battery assembly BA so that the upper batteries 1, 1, 1 ... Are fixed together, but in this fixed band F, the upper stage The batteries 1, 1, 1 ... Can be fixed, but the lower batteries 1, 1, 1 ... Are not fixed, so the upper batteries 1, 1, 1 ... are unstable. The upper batteries 1, 1, 1 ...・ ・ There is a risk of touching and dropping the battery.

On the other hand, as a fixture of a battery group formed by arranging a plurality of batteries in parallel, a technique as shown in Patent Document 1 has been proposed. The holder of the fixative consists of a first case that fits into the upper end of the battery group and a second case that fits into the lower end of the battery group, and the first case and the second case are coupled to each other by an engaging member. It can be integrated. Further, the first case and the second case are interposed between the adjacent batteries to maintain a space between the batteries for improving heat dissipation.

If such a fixture is used to fix the batteries 1, 1, ... In the first to fourth battery groups BG-1 to BG-4 of the battery unit of the battery power supply device, the upper battery 1 is used. , 1,1 ... Not only the lower batteries 1,1,1 ... Can be firmly fixed, and workability when pulling out the connection lines 4a, 4b is improved. In addition, the heat dissipation of each battery 1, 1, 1 ... Can be maintained, and the temperature rise can be prevented.

Japanese Unexamined Patent Publication No. 2016-81761

However, in the fixture shown in the above publication, the holder is composed of two parts, the first case and the second case, the structure is complicated, the weight is heavy, and it takes time and effort to assemble the battery group. There was a problem.

In view of such problems, it is an object of the present invention that the battery fixture is composed of a single component, the structure is simple and lightweight, and the assembly of the battery group is not troublesome. be.

In order to solve the above problem, the invention according to claim 1 of the present application has a plurality of batteries having a rectangular outer shape and having two positive and negative terminals at one end in the longitudinal direction of one surface thereof, and the end on the side where the terminals are located. Four sets of battery groups are formed by arranging the parts in parallel with the same side, the first battery group is arranged with the side with the terminal facing up, and the second battery group is arranged with the first battery group. Place the terminal on the upper surface opposite to the end on the side with the terminal, with the end on the side with the terminal facing down, and the surface with the terminal facing the terminal side of the first battery group. The third battery group is placed so that the surface with the terminal is facing up with the end on the side with the terminal facing up, and the third battery group is brought into contact with the end surface on the side with the terminal of the first battery group. The surface of the second battery group with the terminal and the third battery are arranged so that the side with the terminal is on the side with the terminal and the side with the terminal is on the side with the second battery group. A battery fixture of each battery group in a battery assembly formed between the end face of the group and the end surface of the terminal on the side opposite to the side of the battery group on which the terminal is located. It is characterized in that one surface is made into a box shape with an open surface so that the end portion of the battery can be housed and the batteries constituting the battery group can be integrally fixed.

Further, the invention according to claim 2 of the present application is described in the invention according to claim 1 so as to project from the surface facing the open surface toward the other battery group in contact with the battery fixture. It is characterized in that a locking piece that engages with a part of the battery group of the above is provided.

Further, in the invention according to claim 3 of the present application, in the invention according to claim 1 or 2, a part of each battery is exposed to the outside at the lower end portion of the back plate on the surface facing the open surface. It is characterized in that an opening is provided in the.

Further, the invention according to claim 4 of the present application is the invention according to claim 1, 2 or 3, wherein the terminal of the battery group is located on the inner surface of the surface side where the terminal is located, from the open surface toward the facing surface. The partition ridges are provided in parallel at intervals through which the battery can pass, and stepped portions are provided at both ends of the inner surface in parallel with the partition ridges at intervals through which the battery can pass. It is characterized by.

The present invention has the following effects.
That is, in the invention according to claim 1, one surface is accommodated so that the end portion of each battery group opposite to the side on which the terminal is located can be accommodated so that the batteries constituting the battery group can be integrally fixed. Since it is box-shaped as an open surface, it consists of a single part, the structure is simple and lightweight, and it does not take time to assemble the battery group.

Further, in the invention according to claim 2, in the battery fixture of the battery power supply device according to claim 1, the battery fixture projects from the surface facing the open surface toward the other battery group that abuts on the battery fixture. As described above, since the locking piece that engages with a part of the other battery group is provided, by engaging the locking piece, the adjacent battery groups are coupled and integrated, and are stabilized.

Further, in the invention according to claim 3, in the battery fixture of the battery power supply device according to claim 1 or 2, a part of each battery is attached to the lower end portion of the back plate on the surface facing the open surface. Since the opening is provided so as to be exposed to the outside, a part of each battery is exposed to the outside to obtain a cooling effect, the heat generation of the battery is suppressed, and the weight of the fixture can be reduced.

Further, in the invention according to claim 4, in the battery fixture of the battery power supply device according to claim 1, 2, or 3, the inner surface of the battery group on the surface side where the terminal is located is facing from the open surface. The partition ridges are provided in parallel at intervals through which the battery can pass, and steps are provided at both ends of the inner surface in parallel with the partition ridges at intervals between the battery and the partition ridges. Since the portion is provided, each battery is stably held in the battery fixture without rattling.

It is a figure which shows the inside of the battery unit which concerns on one Example of this invention. It is an external view of the battery unit which concerns on one Embodiment of this invention. It is a figure which shows the battery. It is a perspective view of the battery fixture which concerns on one Embodiment of this invention. It is a projection drawing of the battery fixture of FIG. It is a figure which shows the state in the process of attaching a battery to the battery fixture of FIG. It is a figure which shows the state which attached the battery to the battery fixture of FIG. It is a figure which shows the state which combined the two sets of batteries. It is a figure which shows the state which the locking part is engaged with the concave part of a battery. It is a figure which shows the battery assembly which combined four sets of batteries. It is a figure which shows the 2nd Example. It is a figure which shows the locking part in 2nd Example. It is a figure which shows the battery fixture of the 3rd Embodiment. It is a figure which shows the assembly method of the battery assembly in the prior invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a diagram showing the inside of a battery unit according to an embodiment of the present invention, and FIG. 2 is an external view of the battery unit. In FIGS. 1 and 2, reference numeral 1 is a battery, 2 is a battery fixture, 3 is a space, 4 is a wiring bundle, 5 is a connector, 6 is an output cable, 7 is a base, 8 is a roof panel, and 9 is a louver. 10 is a display board, 11 is a charging connector, and 12 is a handle.

The battery assembly BA composed of a plurality of batteries 1 is housed inside a housing composed of a base 7 and a roof panel 8, and the roof panel 8 is used to ventilate the inside so that heat is not trapped inside. A louver 9 is provided, and an openable / closable handle 12 for carrying the battery unit is provided. Further, on the operation surface portion, a display board 10 provided with a power switch 10a, an output indicator lamp 10b, a charging indicator lamp 10c, an abnormality indicator lamp 10d, a battery remaining amount indicator LED 10e, and a battery assembly BA are charged when the battery assembly BA is charged. A charging connector 11 for connecting a charging cable from the charger unit outside the tterri unit is provided. The charging connector 11 is provided with an openable / closable transparent cover.

For the battery assembly BA in this battery unit, a compact battery assembly BA is formed by devising a method of combining a plurality of batteries 1, and wiring work at the time of manufacturing is also facilitated.

The battery 1 is a lithium-ion battery having a rectangular parallelepiped outer shape, and its outer box is made of resin. As shown in FIG. 3A, the battery 1 has two positive and negative terminals 1a and 1b at the longitudinal end of the upper sealing plate 1d. have. As shown by the solid line in the figure, the side surface of the battery 1 is slightly inclined inward with respect to the vertical surface shown by the dotted line due to the necessity of die cutting at the time of manufacturing, and the upper surface having the terminals 1a and 1b. It has a draft with a narrowing width from the bottom to the bottom. Further, as shown in FIG. 3B, a recess 1c is provided on the back surface of the battery 1 at a position facing the terminals 1a and 1b due to the necessity in the manufacturing process of the battery 1.

The batteries 1 are connected in parallel with a plurality of batteries 1 in this embodiment so that the surfaces having terminals 1a and 1b face in the same direction and the ends on the sides with terminals 1a and 1b are on the same side. A group is formed, and at that time, the batteries 1, 1 and 1 are integrally fixed by the battery fixing tool 2 as shown in FIG.

As shown in the perspective view in FIG. 4 and the projection drawing in FIG. 5, the battery fixture 2 is a box having one open surface 2a so that the batteries 1, 1 and 1 constituting the battery group can be integrated. I have a mold. As the material, for example, FR-PET C9030 (glass fiber reinforced PET resin) having high heat resistance and high mechanical strength can be used. Further, if a resin is used as the material of the battery fixture 2 as such, the weight can be reduced as compared with the case of molding with a metal plate, and molding is also available. Then, on the inner surface on the surface side where the terminal is located, the partition ridges 2b and 2b are parallel to each other from the open surface 2a toward the facing surface where the back plate 2e is located so that the battery 1 can pass through in the longitudinal direction without rattling. Step portions 2c and 2c are provided at both ends of the inner surface thereof in parallel with the partition ridges 2b at intervals that allow the battery 1 to pass between the partition ridges 2b and the partition ridges 2b without rattling in the longitudinal direction.

Further, an opening 2d is provided at the lower end corner of the back plate 2e on the surface facing the open surface 2a so that a part of the battery 1 is exposed to the outside when the battery 1 is housed in the battery fixture 2. There is. The opening 2d contributes to suppressing heat generation of the battery 1 and reducing the weight of the battery fixture 2. Further, the edge of the back plate 2e on the side opposite to the side where the opening 2d is provided is extended, and a locking that engages with the recess 1c of the battery 1 of another battery group to be combined with the battery group. A piece 2f is provided.

As shown in FIG. 6, the battery 1 is inserted into the battery fixture 2 by pushing the end portion on the side opposite to the side where the terminals 1a and 1b are located. At that time, in the battery 1, both side surfaces of the sealing plate 1d protruding from the upper surface of the battery 1 are held by the two partition ridges 2b, 2b or one partition ridge 2b and the step portion 2c, and the battery fixing tool. It is held stably without rattling in 2. In the case shown in FIG. 6, there is a step between the outer box of the battery 1 and the side surface of the sealing plate 1d, and the partition ridge 2b fits in the step, but the outer box and the sealing of the battery 1 are provided. If there is no step between the side surface of the plate 1d and the side surface of the plate 1d, a gap is created between the outer boxes of the adjacent batteries 1 and 1 due to the interposition of the partition ridges 2b, but the air flow is increased by that amount. It improves and the cooling effect of the battery 1 is improved.

Further, the bottom portion of the battery 1 on the side opposite to the side where the terminals 1a and 1b are located is exposed from the opening 2d of the battery fixture 2. At that time, since the draft of the battery 1 is narrowed toward the bottom surface, a gap is formed between the adjacent batteries 1 and 1 and between the battery 1 and the edge of the opening 2d, and air is formed from the gap. Can be taken in and out, and the cooling effect can be obtained more efficiently, so that the heat generation of the battery 1 can be suppressed.

FIG. 7 shows a state in which three batteries 1 are attached to the battery fixative 2. By doing so, each of the batteries 1, 1 and 1 constituting the battery group is fixed by the battery fixture 2 and stabilized, so that the work of connecting the terminals 1a and 1b in series with the connection lines 4a and 4b can be performed. It will be easier.

The battery groups BG-1 to BG-4 are sequentially connected as shown in FIG. 8, for example, in a state of being fixed by the battery fixture 2. The connection procedure of the battery groups BG-1 to BG-4 does not have to be in a fixed order as shown in FIG. Then, when connecting, as shown in FIG. 9, by engaging the locking piece 2f of the battery fixture 2 of the other battery group with the recess 1c on the back surface of each battery 1 of one battery group. Connect each battery group.

In this way, when the four battery groups BG-1 to BG-4 are combined, the battery assembly as shown in FIG. 10 is integrally formed.

FIG. 11 is a diagram showing a second embodiment. In this embodiment, as a locking piece 2g that engages with a portion of the adjacent battery group, its length is extended to reach the battery fixture 2 of the adjacent battery group and at the tip as shown in FIG. An engaging protrusion 2h is provided. An engaging hole 2i to which the engaging projection 2h can engage is provided at a position facing the battery fixture 2 of the adjacent battery group.

By doing so, as shown in FIG. 12, when the other battery group is pressed against one battery group, the engaging projection 2h enters the engaging hole 2i and engages with the battery. The groups are combined and integrated. Then, when the four sets of batteries are combined and combined, a battery assembly as shown in FIG. 11 is formed. In this embodiment, the engagement hole 2i to which the engagement protrusion 2h can engage is provided at the opposite position of the battery fixture 2 of the adjacent battery group, but instead of the engagement hole 2i, the engagement protrusion 2i is provided. A protrusion with which 2h can be engaged may be provided.

In the above embodiment, as the battery fixture 2, partition protrusions 2b and 2b and stepped portions 2c and 2c are provided on the inner surface on the surface side where the terminals are located as shown in FIGS. 4 and 5, and the lower end of the back plate 2e is provided. An opening 2d was provided at the corner and a locking piece 2f was provided at the edge of the back plate 2e, but the present invention is not necessarily limited to this, and for example, one surface as shown in FIG. 13 is provided. A simple box-shaped battery fixture 20 having an open surface 20a can also be applied.

1 Battery 1a, 1b Terminal 1c Recess 1d Seal plate 2,20 Battery fixture 2a, 20a Open surface 2b Partition ridge 2c Step 2d Opening 2e Back plate 2f, 2g Locking piece 2h Engagement protrusion 2i Engagement hole 3 Space 4 Wiring bundle 5 Connector 6 Output cable 7 Base 8 Roof panel 9 Louver 10 Display board 11 Charging connector 12 Handle

Claims (4)

The outer shape is a rectangular body, and a plurality of batteries having two positive and negative terminals at one end in the longitudinal direction of one surface are arranged in parallel with the end on the side where the terminals are located on the same side to form four sets of battery groups. , The first battery group is arranged with the side with the terminal facing up, and the second battery group is placed on the upper surface end portion of the first battery group opposite to the end on the side with the terminal. With the end of the terminal on the side facing down, the surface with the terminal is placed facing the terminal side of the first battery group, and the third battery group is placed on the surface with the terminal. The terminal is located, with the end on the side with the terminal facing up and the end surface of the first battery group on the side with the terminal, and the fourth battery group with the surface with the terminal facing down. Formed by arranging and forming between the surface of the second battery group with the terminal and the end surface of the third battery group with the terminal so that the side is on the side of the second battery group. It is a battery fixture of each of the above battery groups in the battery assembly.
The end of each battery group on the side opposite to the side where the terminal is located is housed, and one side is made into a box shape with an open surface so that the batteries constituting the battery group can be integrally fixed. The battery fixture of the battery power supply is characterized by that. It is characterized in that a locking piece that engages with a part of the other battery group is provided so as to project from the surface facing the open surface toward the other battery group that abuts on the battery fixture. The battery fixture of the battery power supply according to claim 1. The battery power supply device according to claim 1 or 2, wherein an opening is provided at the lower end of a back plate on a surface facing the open surface so that a part of each battery is exposed to the outside. Battery fixture. Partition protrusions are provided in parallel on the inner surface of the battery group on the surface side where the terminal is located from the open surface toward the facing surface at intervals through which the battery can pass, and the partition protrusions are provided at both ends of the inner surface. The battery fixture of the battery power supply device according to claim 1, 2, or 3, wherein a step portion is provided between the strip and the partition protrusion at intervals through which the battery can pass.

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