Battery pack

Abstract

The invention provides a battery pack which can suppress entry of foreign matters during transportation and has high versatility. A battery pack (10) is provided with: a unit cell stack (30) in which a plurality of unit cells (40) are stacked; and a case (20) that houses the single cell stack (30). The case (20) is provided with: a cell housing space (25) that houses the cell stack (30) and closes the cell stack (30) from the outside; an output terminal housing space (27) in which an output conductive member (61) extending from the single cell housing space (25) and an extraction conductive member (70) entering from the first opening (91) are connected; and a cover member (15) that detachably closes the first opening (91).

Description

Technical Field

[0001] The present invention relates to a battery pack. Background Art

[0002] In recent years, in order to ensure that more people can obtain affordable, reliable, and sustainable modern energy, research and development related to secondary batteries that contribute to improving energy efficiency have been underway.

[0003] In conventional electric vehicles and hybrid vehicles, a battery pack is mounted in which a plurality of battery modules are housed in a battery case (for example, Patent Document 1). However, in this case, it is necessary to design a battery pack for each vehicle, so there is a problem that the battery pack has no versatility.

[0004] In addition, in Patent Document 2, a reloadable battery is proposed. Patent Document 2 describes the following: In order to facilitate the disassembly and assembly of the battery and the cable terminal during reloading, a slit is provided on the terminal block, and in a state where a Y-shaped (U-shaped) terminal into which a cable is inserted from the slit is exposed to the outside, the exposed cam lever is rotated to fasten the terminals to each other.

[0005] Prior Art Documents

[0006] Patent Documents

[0007] Patent Document 1: Japanese Patent Application Laid-Open No. 2000-62472

[0008] Patent Document 2: Japanese Patent No. 5945785 Summary of the Invention

[0009] Problems to be Solved by the Invention

[0010] In Patent Document 2, since the terminal of the cable is inserted through the slit of the terminal block, the terminal of the cable cannot use a terminal other than the U-shaped terminal, and there is a problem in terms of versatility. On the other hand, when the connection terminal of the terminal block is exposed during transportation or the like, foreign matter may enter the inside of the battery pack, which is not preferable.

[0011] The present invention provides a battery pack that can suppress the entry of foreign matter during transportation and has high versatility. It further contributes to improving energy efficiency.

[0012] Means for Solving the Problems

[0013] The present invention relates to a battery pack including:

[0014] a single battery laminate in which a plurality of single batteries are laminated; and

[0015] a case that houses the single battery laminate,

[0016] Among them, the housing includes:

[0017] A single battery storage space that stores the single battery stack and encloses the single battery stack from the outside;

[0018] An output terminal storage space where a conductive component extending from the single battery storage space and an external conductive component entering from the opening are connected; and

[0019] A cover member that detachably closes the opening.

[0020] Advantages of the Invention

[0021] According to the present invention, it is possible to mount the battery pack on various devices while suppressing foreign matter from entering the housing. Description of the Drawings

[0022] Figure 1 is an external perspective view of the battery pack 10.

[0023] Figure 2 is an exploded perspective view of the battery pack 10.

[0024] Figure 3 is an exploded perspective view of the single battery stack 30.

[0025] Figure 4 is a top view of the battery pack 10.

[0026] Figure 5 is a view showing the output terminal storage space 27 of the modified example.

[0027] Figure 6 is an external perspective view of the battery assembly 100.

[0028] Figure 7 is an external perspective view of the battery assembly 100 viewed from the bottom side with the bottom cover 126 disassembled.

[0029] Figure 8 is an external perspective view of the central frame 120.

[0030] Figure 9 is an external perspective view of the central frame 120 viewed from the bottom side with the bottom cover 126 disassembled.

[0031] Figure 10 is a side view of the four-wheeled vehicle 301 with the battery assembly 100 arranged under the floor.

[0032] Figure 11 is a side view of the two-wheeled vehicle 302 equipped with the battery assembly 100A.

[0033] Figure 12 It is a side view of the lawn mower 303 equipped with the battery assembly 100A.

[0034] Figure 13 It is a side view of the carrier 304 equipped with the battery assembly 100A.

[0035] Figure 14 It is a side view of the electric power unit 305 equipped with the battery assembly 100B.

[0036] Explanation of reference numerals

[0037] 10 Battery pack

[0038] 12 Second seal (sealing member)

[0039] 15 Cover member

[0040] 20 Housing

[0041] 25 Single battery storage space

[0042] 27 Output terminal storage space

[0043] 30 Single battery stack

[0044] 40 Single battery

[0045] 60 Terminal block

[0046] 61 Output conductive member (conductive member)

[0047] 70 Extraction conductive member (external conductive member)

[0048] 91 First opening (opening)

[0049] 301 Four-wheeled vehicle

[0050] 302 Two-wheeled vehicle

[0051] 303 Lawn mower

[0052] 304 Carrier

[0053] 305 Electric power unit

[0054] L Center line of the battery pack. Detailed implementation mode

[0055] Hereinafter, an embodiment of the battery pack of the present invention will be described based on the drawings. In the following description, for convenience, a coordinate system composed of mutually orthogonal front-back direction, left-right direction, and up-down direction will be used for the description. In the drawings, the front is represented as Fr, the rear is represented as Rr, the left side is represented as L, the right side is represented as R, the upper side is represented as U, and the lower side is represented as D. However, these directions are independent of the direction when the battery pack is mounted on the device. For example, when the battery pack is mounted on a vehicle, the up-down direction of the battery pack may face the traveling direction of the vehicle or the vehicle width direction when mounted on the vehicle.

[0056] [Battery Pack]

[0057] As Figure 1 and Figure 2 shown, two single-cell stacks 30 are arranged in the front-back direction inside the box-shaped housing 20 of the battery pack 10. As Figure 3 shown, the single-cell stack 30 has a plurality of rectangular single cells 40 stacked in the left-right direction, and an end plate 31 disposed on one side in the left-right direction (the left side in this embodiment), and they are temporarily fixed with a prescribed pressure by using a plate clamp 50. In addition, a partition (not shown) may be disposed between adjacent single cells 40. The plate clamp 50 includes a rectangular lower restraint portion 51 that surrounds the bottom surface of the single-cell stack 30, a rectangular upper restraint portion 52 that surrounds the upper surface of the single-cell stack 30, and a pair of side restraint portions 53 that are clamped in from the front-back direction of the single-cell stack 30, and the lower restraint portion 51 and the pair of side restraint portions 53 are integrally formed. In addition, it may be configured to dispose another end plate, partition, etc. on the other side in the left-right direction of the single-cell stack 30 (the right side in this embodiment) so that the single cells 40 do not directly contact the housing 20 on the other side. In addition, the single-cell stack 30 may not be a structure in which a plurality of single cells 40 are restrained by the plate clamp 50, that is, it may be a structure in which a plurality of single cells 40 are directly stacked and arranged inside the housing 20.

[0058] The single cell 40 is, for example, a secondary battery such as a lithium-ion battery. A pair of terminal portions 42 and a safety valve 44 disposed between the pair of terminal portions 42 are provided on the upper surface of the single cell 40. The pair of terminal portions 42 includes a positive terminal and a negative terminal. For example, the positive terminal is connected to the negative terminal of an adjacent single cell 40 via a bus bar (not shown), and the negative terminal is connected to the positive terminal of an adjacent single cell 40 via a bus bar (not shown), whereby a plurality of single cells 40 are electrically connected in series. For example, in order to shorten the length of the bus bar, a plurality of single cells 40 may be stacked in a manner of alternately flipping in the front-back direction.

[0059] The safety valve 44 is a rupture-type valve for preventing the outer can from rupturing when the internal pressure of the single cell 40 rises abnormally. When the internal pressure of the single cell 40 rises abnormally, the safety valve 44 ruptures and the gas in the single cell 40 is released to the outside. By arranging the safety valve 44 at the center of the front-to-back direction of the single cell 40, even if a plurality of single cells 40 are stacked in a manner that the orientation in the front-to-back direction is alternately reversed, they can be gathered at the same position in the front-to-back direction.

[0060] return Figure 2 The housing 20 includes a housing body 21 with an upper opening and a housing cover 23 covering the opening of the housing body 21. The housing body 21 includes a front wall 82 and a rear wall 84 extending in the left-right direction, a left wall 86 connecting the left ends of the front wall 82 and the rear wall 84, a right wall 87 connecting the right ends of the front wall 82 and the rear wall 84, and a bottom wall 88. The space surrounded by the front wall 82, the rear wall 84, the left wall 86, and the right wall 87 constitutes a single cell storage space 25 for storing the single cell stack 30.

[0061] The left wall portion 86 is provided with an opening portion 86a for communicating the cell storage space 25 with the outside, and a pressure plate 28 is mounted via a seal 16 (e.g., a rubber seal). By fixing the pressure plate 28 to the left wall portion 86, the pressure plate 28 contacts the end plates 31 of each cell stack 30 from the opening portion 86a. The pressure plate 28 presses the end plates 31 inward, thereby further pressurizing the cell stack 30 temporarily fixed by the plate clamp 50 at a predetermined pressure in the stacking direction and retaining it in the housing 20. The fixing of the pressure plate 28 to the left wall portion 86 may be fixing by welding such as friction stir welding, or fixing by bolts.

[0062] In addition, if Figure 1 As shown, two pressure release valves 13 communicating with the cell storage space 25 are provided on the pressurizing plate 28. When the internal pressure of the cell storage space 25 increases abnormally due to the gas generated from the safety valve 44 of the cell 40, the pressure release valve 13 opens to release the gas in the housing 20 to the outside.

[0063] In addition, a bulging portion 22 is formed in front of and to the left of the front wall portion 82 so as to protrude further forward from the front wall portion 82. A space is formed inside the bulging portion 22, a first opening 91 is provided on the front surface, and a second opening 92 is also provided on the upper surface. A terminal block 60 for connecting the extraction conductive member 70 is provided in the internal space of the bulging portion 22, constituting an output terminal accommodation space 27. On the terminal block 60, the terminal portion (output terminal) of the output conductive member 61 extending from the single cell accommodation space 25 to the output terminal accommodation space 27 is electrically connected to the terminal portion of the extraction conductive member 70 entering the output terminal accommodation space 27 from the first opening 91. The output conductive member 61 includes a positive side bus bar 62 and a negative side bus bar 63, and the positive side bus bar 62 and the negative side bus bar 63 extend from the positive side output terminal and the negative side output terminal of two single cell stacked bodies 30 electrically connected in series, respectively. The extraction conductive member 70 includes a positive side bus bar 72 and a negative side bus bar 73, and the positive side bus bar 72 and the negative side bus bar 73 are connected to external positive and negative terminals, respectively.

[0064] As Figure 4 shown, the first opening 91 is provided to be displaced in the left-right direction with respect to the center line L in the left-right direction of the battery pack 10. That is, the center line L1 of the first opening 91 is provided to be displaced in the left-right direction with respect to the center line L in the left-right direction of the battery pack 10.

[0065] In addition, the terminal block 60 is also provided to be displaced in the left-right direction with respect to the center line L in the left-right direction of the battery pack 10. That is, the center line L2 of the terminal block 60 is provided to be displaced in the left-right direction with respect to the center line L in the left-right direction of the battery pack 10.

[0066] The fastening of the terminal portion of the output conductive member 61 and the terminal portion of the extraction conductive member 70 is preferably bolt fastening. By bolt fastening, the terminal portions of the output conductive member 61 and the extraction conductive member 70 can be circular (R-shaped) or front-opening (Y-shaped). Thus, by connecting the extraction conductive member 70 from the first opening 91 of the output terminal accommodation space 27, the battery pack 10 can be mounted on various devices.

[0067] Thus, inside the housing 20, there are provided: a single cell accommodation space 25 that accommodates two single cell stacked bodies 30; and an output terminal accommodation space 27 that is disposed in front of and to the left of the single cell accommodation space 25 and is connected to the extraction conductive member 70. In addition, the number of single cell stacked bodies 30 accommodated in the single cell accommodation space 25 can be one or three or more.

[0068] In the front wall portion 82, the height of the region (hereinafter referred to as the partition portion 85) that separates the single-cell accommodation space 25 from the output terminal accommodation space 27 is lower than that of other regions. The positive-side bus bar 62 and the negative-side bus bar 63 extend from above the partition portion 85 to the output terminal accommodation space 27 and are fixed to the terminal block 60 provided in the output terminal accommodation space 27.

[0069] In addition, as Figure 1 shown, a signal line connector 67 is provided in the output terminal accommodation space 27. The signal line connector 67 is connected to the signal line through a through-hole provided in the partition portion 85 that communicates the single-cell accommodation space 25 with the output terminal accommodation space 27.

[0070] As Figure 2 shown, the upper surface of the housing 20 other than the partition portion 85 is provided with a housing cover 23 with a first seal 11 (such as a rubber seal) interposed therebetween. The housing cover 23 is fixed to the upper surface of the housing 20 by welding such as friction stir welding. A second seal 12 (such as a foam seal) is provided in the gap between the partition portion 85 and the housing cover 23, and the single-cell accommodation space 25 is sealed from the outside by the first seal 11 and the second seal 12. By sealing the single-cell accommodation space 25 from the outside, it is possible to prevent foreign matter from entering the single-cell accommodation space 25 and suppress the deterioration of the single cell 40. In addition, it is preferable to provide a seal such as a foam seal in the gap between the through-hole provided in the partition portion 85 and the signal line.

[0071] As Figure 1 shown, the lid member 15 detachably closes the first opening 91. The lid member 15 can be firmly fixed to the front surface of the bulging portion 22 by bolts or the like, or can be fixed by elastically fitting with resin, rubber, etc. During transportation, by closing the first opening 91 with the lid member 15, the output terminal accommodation space 27 is closed, and foreign matter can be prevented from entering the housing 20. When using the battery pack 10, the lid member 15 is removed.

[0072] The lid member 15 is preferably fixed to the front surface of the bulging portion 22 with a seal member interposed therebetween. By sandwiching the seal member, the sealing function can be further improved, and the output terminal accommodation space 27 can be more reliably sealed. The seal member is, for example, a rubber seal.

[0073] The battery pack 10 configured in this way does not include auxiliary devices such as a junction box for accommodating contactors, fuses, etc., and an ECU. Therefore, when the battery pack 10 is used alone, the junction box and / or the ECU can also be connected to the battery pack 10 via the distribution box 200 or by means of a cable or the like. In addition, when multiple battery packs 10 are used, the battery packs 10 can also be electrically connected to each other through the distribution box 200, and the junction box and / or the ECU can be connected to the distribution box 200. In addition, the junction box and / or the ECU can also be built into the distribution box 200, and the multiple battery packs 10 can be connected to the junction box and / or the ECU inside the distribution box. In addition, the distribution box 200 will be described later.

[0074] The upper surface of the housing cover 23 preferably has a flat surface or a fitting shape that fits with the bottom wall portion 88 of the housing main body 21. Thus, when the device to be mounted requires two or more battery packs 10, the housing 20 can be stacked in the vertical direction. For example, assume that the battery packs 10 are stacked in about five layers and used as a fixed installation type.

[0075] In addition, in the above-described embodiment, only the positive bus bar 62 and the negative bus bar 63 of the conductive member 61 extend from the single battery accommodation space 25 to the terminal block 60 in the output terminal accommodation space 27. However, as Figure 5 shown, the midpoint bus bars 64 and 65 can also extend from the single battery accommodation space 25 to the terminal block 60 in the output terminal accommodation space 27. The midpoint bus bars 64 and 65 are located in the middle part between a plurality of serially connected single batteries 40 and are fastened to the terminal block 60 by bolts, thereby making the series circuit conductive. Therefore, when performing the fastening operation of the output conductive member 61 (positive bus bar 62, negative bus bar 63) and the removal conductive member 70 (positive bus bar 72, negative bus bar 73), by previously removing the bolts from the midpoint bus bars 64 and 65, the occurrence of accidental short circuits can be suppressed.

[0076] Next, with reference to Figures 6 to 9 , a mounting structure of the battery pack in which four battery packs 10 are mounted under the floor of the vehicle will be described. In the following description, the front-rear direction, left-right direction (vehicle width direction), and up-down direction are defined based on the vehicle.

[0077] In this mounting structure, as Figure 6 shown, a central frame 120 extending in the vehicle width direction is fixed between the left frame 110L and the right frame 110R extending in the front-rear direction of the vehicle. In addition, in the space in front of the central frame 120, the above two battery packs 10 are arranged side by side in the left and right directions, and in the space behind the central frame 120, the above two battery packs 10 are arranged side by side in the left and right directions. Hereinafter, this structure will be referred to as the battery pack assembly 100.

[0078] [Battery Pack Assembly]

[0079] In the battery assembly 100, the two front battery packs 10 are arranged such that the bulging portions 22 are located at the rear and to the right, and the two rear battery packs 10 are arranged such that the bulging portions 22 are located at the front and to the left. That is, the two front battery packs 10 and the two rear battery packs 10 are arranged in a state of being rotated 180° so that the bulging portions 22 face each other in the front-rear direction with the central frame 120 therebetween.

[0080] As Figure 8 and Figure 9 shown, the central frame 120 of the battery assembly 100 is a hollow body having a rectangular cross-section, and is fastened to the left frame 110L and the right frame 110R by flange portions 127 formed at the left and right ends and extending in the front-rear direction.

[0081] Two front communication holes 121a are formed on the front surface 121 of the central frame 120, and are respectively communicated with the first opening portions 91 of the bulging portions 22 of the front battery packs 10. Similarly, two rear communication holes 122a are formed on the rear surface 122 of the central frame 120, and the two rear communication holes 122a are respectively communicated with the first opening portions 91 of the bulging portions 22 of the rear battery packs 10.

[0082] Fastening portions 123 for liquid-tightly fastening the corresponding battery packs 10 are respectively provided around the front communication holes 121a and the rear communication holes 122a. For example, each battery pack 10 is fixed to the central frame 120 by bolt fastening. As Figure 8 shown, the central frame 120 has fastening portions 123 on the front surface 121 and the rear surface 122 respectively, and the front surface 121 and the rear surface 122 protrude upward and downward, so that it has a high-rigidity cross-sectional shape in the form of an H-beam in a cross-section cut along the front-rear direction.

[0083] The extraction conductive member 70 enters the hollow region 125 of the central frame 120 from the output terminal accommodation space 27 formed in the bulging portion 22 of each battery pack 10 through the first opening portion 91. As described above, since the terminal blocks 60 of the battery packs are displaced in the left-right direction with respect to the center line L, the terminal blocks 60 of the front battery packs 10 and the terminal blocks 60 of the rear battery packs 10 are displaced in the left-right direction. Thus, the extraction conductive member 70 connected to the bus bar unit 140 through the front communication hole 121a from the terminal block 60 of the front battery pack 10 and the extraction conductive member 70 connected to the bus bar unit 140 through the rear communication hole 122a from the terminal block 60 of the rear battery pack 10 are displaced in the vehicle width direction. Therefore, the extraction conductive member 70 extending from the front battery pack 10 and the extraction conductive member 70 extending from the rear battery pack 10 do not interfere with each other in the hollow region 125 of the central frame 120.

[0084] As Figure 7 shown, a bus bar unit 140 is disposed in a hollow region 125 of a central frame 120. The bus bar unit 140 includes, for example, a plurality of connecting bus bars, and as shown by the arrow in Figure 9 , four battery packs 10 are electrically connected in series. The central frame 120 is an example of the above-mentioned distribution box 200.

[0085] A bottom surface opening 124 is provided on the back surface of the central frame 120, and the bottom surface opening 124 is hermetically closed by a bottom surface cover 126 with a sealing member 14 interposed therebetween (refer to Figure 9 ). The bottom surface opening 124 of the central frame 120 is hermetically closed by the bottom surface cover 126, and the communication holes 121a and 122a of the central frame 120 are hermetically fastened to the first openings 91 of the respective battery packs 10. Therefore, moisture is restricted from entering the output terminal accommodation space 27 of the battery pack 10 and the internal space of the central frame 120 from the outside. In a state where the bottom surface cover 126 is removed, the extraction conductive members 70 extending from the respective battery packs 10 to the hollow region 125 of the central frame 120 are fastened to the bus bar unit 140 from the bottom surface opening 124.

[0086] The battery assembly 100 configured as described above is fixed to a frame member of a vehicle by a pair of central support portions 128 provided on the central frame 120 as shown in Figure 8 and side support portions 111 provided on the left frame 110L and the right frame 110R as shown in Figure 6 , and is disposed under the floor of the vehicle.

[0087] Figure 10 FIG. is a side view of a four-wheeled vehicle 301 in which the battery assembly 100 is disposed under the floor. The four-wheeled vehicle 301 is configured to be able to operate by driving a motor (not shown) with the power of the battery pack 10. The four-wheeled vehicle may be a hybrid vehicle, an electric vehicle, or a fuel cell vehicle. In addition, the battery pack 10 is not limited to being mounted on a four-wheeled vehicle, and can also be mounted on vehicles such as two-wheeled vehicles and three-wheeled vehicles, working machines such as lawn mowers and ramming machines, and various devices such as electric battery units.

[0088] Figure 11 FIG. is a side view of a two-wheeled vehicle 302 equipped with a battery assembly 100A.

[0089] The battery assembly 100A includes: battery packs 10 stacked in upper and lower layers; and a distribution box 200 disposed in front of the two battery packs 10 and electrically connecting the two battery packs 10 to each other. The two-wheeled vehicle 302 is configured to be able to operate by driving a motor (not shown) with the power of the battery pack 10.

[0090] Figure 12It is a side view of a lawn mower 303 equipped with a battery assembly 100A.

[0091] The lawn mower 303 drives a motor (not shown) by the power of the battery pack 10 to rotate a blade. In addition to rotating the blade, the power of the battery pack 10 can also drive the wheels.

[0092] Figure 13 It is a side view of a carrier 304 equipped with a battery assembly 100A.

[0093] The carrier 304 is configured to be able to drive a motor (not shown) by the power of the battery pack 10 to perform automatic operation.

[0094] Figure 14 It is a side view of an electric power unit 305 equipped with a battery assembly 100B.

[0095] The battery assembly 100B includes one battery pack 10 and a distribution box 200 disposed in front of the battery pack 10. The electric power unit 305 drives a motor 306 by the power of the battery pack 10. In addition, the electric power unit 305 can be a separable type electric power unit in which the battery pack 10 and the motor 306 are separated, or an integrated type electric power unit in which the battery pack 10 and the motor 306 are housed in one housing and integrated.

[0096] The battery assemblies 100, 100A, and 100B only need to include one or more battery packs 10, and the number thereof is not limited. In addition, in addition to the above examples, the battery pack 10 can also be used as a fixed type battery in which a plurality of battery packs are stacked. The battery assemblies 100, 100A, 100B and / or the fixed type battery can also include a battery pack 10 that has been recycled or reused after being used in other applications. By using the battery pack 10 that has been used in other applications, the discarded battery pack 10 can be reduced, and resources can be effectively utilized.

[0097] As described above, various embodiments have been described with reference to the drawings, but the present invention is of course not limited to this example. Obviously, those skilled in the art can think of various modification examples or correction examples within the scope described in the technical solution, and it should be understood that these modification examples and correction examples also of course belong to the technical scope of the present invention. In addition, within the scope not departing from the gist of the invention, the constituent elements in the above embodiments can be arbitrarily combined.

[0098] For example, in the battery pack 10, a water jacket can be integrally or separately provided on the bottom wall portion 88.

[0099] At least the following matters are described in this specification. In addition, although the corresponding constituent elements and the like in the above embodiments are shown in parentheses, the present invention is not limited thereto.

[0100] (1) A battery pack (battery pack 10) includes:

[0101] A single battery laminate (single battery laminate 30) in which a plurality of single batteries (single batteries 40) are laminated; and

[0102] A housing (housing 20) that houses the single battery laminate,

[0103] wherein the housing includes:

[0104] A single battery accommodation space (single battery accommodation space 25) that houses the single battery laminate and encloses the single battery laminate from the outside;

[0105] An output terminal accommodation space (output terminal accommodation space 27) where a conductive member (output conductive member 61) extending from the single battery accommodation space is connected to an external conductive member (extraction conductive member 70) entering from an opening (first opening 91) in the output terminal accommodation space; and

[0106] A lid member (lid member 15) that detachably closes the opening.

[0107] According to (1), by connecting the external conductive member entering the output terminal accommodation space from the opening to the conductive member, the battery pack can be mounted on various devices. In addition, by closing the output terminal accommodation space with the lid member when transporting the battery pack, foreign matter entering the housing can be suppressed.

[0108] (2) The battery pack according to (1), wherein

[0109] A sealing member (second seal 12) is provided at a communication portion between the single battery accommodation space and the output terminal accommodation space,

[0110] and the single battery accommodation space is sealed.

[0111] According to (2), by sealing the single battery accommodation space, deterioration of the single battery can be suppressed even in a state where the lid member is not installed.

[0112] (3) The battery pack according to (1) or (2), wherein

[0113] The conductive member and the external conductive member are configured to be electrically connected by bolts.

[0114] According to (3), the battery pack has high versatility and can be mounted on various devices.

[0115] (4) The battery pack according to any one of (1) to (3), wherein

[0116] The terminal block (terminal block 60) connecting the conductive component and the external conductive component is misaligned in the width direction with respect to the center line (center line L) in the width direction of the battery pack.

[0117] According to (4), by arranging the battery pack in a state where it is rotated 180° in the front-rear direction relative to each other, the position of the terminal block can be misaligned. Thereby, interference of the external conductive component extending from the terminal block of the battery pack and connected to the conductive component can be suppressed.

[0118] (5) The battery pack according to any one of (1) to (4), wherein

[0119] The upper surface of the housing has a flat surface or a fitting shape that fits with the bottom surface of the housing.

[0120] The housing is configured to be stackable in the vertical direction.

[0121] According to (5), a plurality of battery packs can be mounted in a stacked state according to the device.

[0122] (6) The battery pack according to any one of (1) to (5), wherein

[0123] The battery pack is mounted on an electric power unit (electric power unit 305), and the electric power unit drives a motor by the power of the battery pack.

[0124] According to (6), the battery pack can be used as a battery of an electric power unit, and the electric power unit can be used as a power source for a work machine.

[0125] (7) The battery pack according to any one of (1) to (5), wherein

[0126] The battery pack is mounted on a transport cart (transport cart 304), and the transport cart can drive a motor by the power of the battery pack to move.

[0127] According to (7), the battery pack can be used as a battery of a transport cart for transporting goods.

[0128] (8) The battery pack according to any one of (1) to (5), wherein

[0129] The battery pack is mounted on a lawn mower (lawn mower 303), and the lawn mower drives a motor by the power of the battery pack to rotate a blade.

[0130] According to (8), the battery pack can be used as a battery of a lawn mower.

[0131] (9) The battery pack according to any one of (1) to (5), wherein

[0132] The battery pack is mounted on a two-wheeled vehicle (two-wheeled vehicle 302), and the two-wheeled vehicle can be operated by driving a motor with the power of the battery pack.

[0133] According to (9), the battery pack can be used as a battery for an electric two-wheeled vehicle.

[0134] (10) The battery pack according to any one of (1) to (5), wherein

[0135] The battery pack is mounted on a four-wheeled vehicle (four-wheeled vehicle 301), and the four-wheeled vehicle can be operated by driving a motor with the power of the battery pack.

[0136] According to (10), the battery pack can be used as a battery for an electric vehicle.

[0137] (11) The battery pack according to any one of (1) to (5), wherein

[0138] The battery pack is mounted on a fixedly installed battery, and a plurality of the battery packs are stacked in the fixedly installed battery.

[0139] According to (11), the battery pack can be used as a fixedly installed battery.

[0140] (12) The battery pack according to (11), wherein

[0141] The fixedly installed battery includes a battery pack that has been used up in other applications.

[0142] According to (12), it is possible to use a battery pack that has been used up in other applications, reduce the discarded battery packs, and effectively utilize resources.

Claims

1. A battery pack comprising: a single cell stack in which a plurality of single cells are stacked; and a casing that accommodates the single cell stack; in, The housing comprises: a single cell storage space that stores the single cell stack and seals the single cell stack relative to the outside; an output terminal storage space in which a conductive member extending from the battery storage space and an external conductive member entering from the opening are connected; as well as A cover member is provided for detachably closing the opening.

2. The battery pack according to claim 1, wherein: A sealing member is provided at a communication portion between the battery storage space and the output terminal storage space. The battery storage space is sealed.

3. The battery pack according to claim 1, wherein: The conductive member and the external conductive member are configured to be electrically connectable by a bolt.

4. The battery pack according to claim 1, wherein: The terminal block to which the conductive member and the external conductive member are connected is offset in the width direction with respect to a center line in the width direction of the battery pack.

5. The battery pack according to claim 1, wherein: The upper surface of the housing has a flat surface or a fitting shape fitting with the bottom surface of the housing. The housings are configured to be stackable in an up-and-down direction.

6. The battery pack according to any one of claims 1 to 5, wherein: The battery pack is mounted on an electric power unit, and the electric power unit drives a motor using the electric power of the battery pack.

7. The battery pack according to any one of claims 1 to 5, wherein: The battery pack is mounted on a transport cart, and the transport cart can be moved by driving a motor using the power of the battery pack.

8. The battery pack according to any one of claims 1 to 5, wherein: The battery pack is mounted on a lawn mower, and the lawn mower drives a motor using the power of the battery pack to rotate a blade.

9. The battery pack according to any one of claims 1 to 5, wherein: The battery pack is mounted on a two-wheeled vehicle, and the two-wheeled vehicle can be operated by driving a motor using the power from the battery pack.

10. The battery pack according to any one of claims 1 to 5, wherein: The battery pack is mounted on a four-wheeled vehicle, and the four-wheeled vehicle can be operated by driving a motor using the power from the battery pack.

11. The battery pack according to any one of claims 1 to 5, wherein: The battery pack is mounted on a fixed-type battery, and the fixed-type battery is a stack of a plurality of the battery packs.

12. The battery pack according to claim 11, wherein: The fixed installation type battery includes a battery pack that has been used for other purposes.

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