Storage battery pack

Abstract

The invention provides a storage battery pack capable of ensuring safety of electric connection work with an external device through a simple structure. A storage battery pack (10) is provided with: a plurality of stacked unit cells (40); a case (20) in which the plurality of unit cells are housed; a terminal block (60) to which a positive electrode-side bus bar (62) and a negative electrode-side bus bar (63) extending from a terminal section (42) of the single cell are connected; and a protection member (65) that protects the terminal block (60). The terminal block has a positive-electrode-side connection part (60a) and a negative-electrode-side connection part (60b) that connect the positive-electrode-side bus bar (62) and the negative-electrode-side bus bar (63) to a positive-electrode-side bus bar (72) and a negative-electrode-side bus bar (73) that are electrically connected to an external device, and the positive-electrode-side connection part and the negative-electrode-side connection part are disposed adjacent to each other. The protective member has a sliding cover (653), and the sliding cover selectively covers one of the connecting portions by sliding movement.

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 energy efficiency have been underway.

[0003] For example, Patent Document 1 describes a vehicle power storage device as a driving power source for an electric vehicle. In Patent Document 1, the power storage device can be retrofitted, and when retrofitting, in order to facilitate the installation and removal of the connection terminals on the load side with respect to the power storage device, a slit is provided on the terminal block of the power storage device, and the connection terminals on the load side are inserted through the slit. In this state, by rotating the cam rod exposed to the outside, the connection terminals on the load side are fastened to the terminal block.

[0004] Prior Art Documents

[0005] Patent Documents

[0006] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2015-30290 Summary of the Invention

[0007] Problems to be Solved by the Invention

[0008] When performing an operation of electrically connecting a storage battery to an external device, it is necessary to ensure safety to prevent a short circuit. In Patent Document 1, safety is ensured by using a terminal block cover to cover the output terminals provided on the terminal block, but a slit through which the connection terminals on the load side can be inserted is provided on the terminal block, and a cam rod is provided to reliably connect the connection terminals on the load side to the output terminals of the terminal block, resulting in a complex structure.

[0009] The present invention provides a battery pack that can ensure the safety of the electrical connection operation with an external device with a simple structure. Moreover, it contributes to energy efficiency.

[0010] Means for Solving the Problems

[0011] The present invention is a battery pack, comprising:

[0012] a plurality of single cells stacked;

[0013] a housing that houses the plurality of single cells;

[0014] a terminal block to which at least two first conductive members extending from the terminal portions of the single cells are connected; and

[0015] a protection member that protects the terminal block,

[0016] Among them,

[0017] The terminal block has at least two connection parts for connecting the at least two first conductive parts and at least two second conductive parts, and the second conductive parts are electrically connected to an external device.

[0018] The at least two connection parts are arranged adjacent to each other.

[0019] The protection part has a sliding cover, and the sliding cover selectively covers any one of the at least two connection parts by sliding.

[0020] Advantages of the Invention

[0021] According to the present invention, the safety of the electrical connection operation with an external device can be ensured with a simple structure. Description of the Drawings

[0022] Figure 1 is a perspective view of the exterior 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-cell laminate 30.

[0025] Figure 4 is a perspective view of the protection part 65 in a state where the sliding cover 653 covers the positive-side connection part 60a.

[0026] Figure 5 is a perspective view of the protection part 65 in a state where the sliding cover 653 covers the negative-side connection part 60b.

[0027] Figure 6 is a perspective view of the exterior of the battery pack assembly 100.

[0028] Figure 7 is a perspective view of the exterior of the battery pack assembly 100 viewed from the bottom side when the bottom cover 126 is disassembled.

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

[0030] Figure 9 is a perspective view of the protection part 65 provided on the positive-side bus bar 72 and the negative-side bus bar 73.

[0031] Description of Reference Numerals

[0032] 10 Battery pack

[0033] 20 Housing

[0034] 40 single battery

[0035] 42 terminal part

[0036] 60 terminal block

[0037] 60a positive electrode side connection part (connection part)

[0038] 60b negative electrode side connection part (connection part)

[0039] 62 positive electrode side bus bar (first conductive component)

[0040] 63 negative electrode side bus bar (first conductive component)

[0041] 65 protection component

[0042] 652a, 652b opening part

[0043] 653 sliding cover

[0044] 654 partition board

[0045] 72 positive electrode side bus bar (second conductive component)

[0046] 73 negative electrode side bus bar (second conductive component)

[0047] 82 front wall part (side wall part)

[0048] 91 first opening part (housing opening part). Detailed implementation mode

[0049] Hereinafter, an embodiment of the battery pack of the present invention will be described based on the drawings. In addition, in the following description, for convenience, a coordinate system composed of the front - rear direction, left - right direction, and up - down direction that are orthogonal to each other will be used for 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 have nothing to do with 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 can be in the traveling direction of the vehicle when mounted, or can be in the vehicle width direction.

[0050] [Battery pack]

[0051] As Figure 1 and Figure 2 shown, in the battery pack 10, two single - battery stacks 30 are arranged side by side in the front - rear direction inside the box - shaped housing 20. As Figure 3As shown, the single cell stack 30 has a plurality of square 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). They are temporarily fixed with a prescribed pressure by using a plate clamp 50. Additionally, 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 sandwich the single cell stack 30 in the front - rear direction. The lower restraint portion 51 and the pair of side restraint portions 53 are integrally formed. Additionally, it may be configured such that another end plate, partition, etc. are disposed 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 cell 40 does not directly contact the housing 20 on the other side. Furthermore, the single cell stack 30 may not constrain the plurality of single cells 40 by the plate clamp 50, that is, the plurality of single cells 40 may be directly stacked and disposed inside the housing 20.

[0052] The single cell 40 is, for example, a secondary battery such as a lithium - ion battery. On the upper surface of the single cell 40, there are provided: a pair of terminal portions 42 disposed at both ends in the front - rear direction, which is a direction orthogonal to the stacking direction of the single cells 40; and a safety valve 44 disposed at the central portion in the front - rear direction and arranged between the pair of terminal portions 42. 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 such a manner that the front - rear direction orientations are alternately reversed.

[0053] The safety valve 44 is a rupture - type valve for preventing the rupture of the outer can when the internal pressure of the single cell 40 abnormally rises. When the internal pressure of the single cell 40 abnormally rises, the safety valve 44 ruptures, and the gas inside the single cell 40 is released to the outside. By disposing the safety valve 44 at the central portion in the front - rear direction of the single cell 40, even when a plurality of single cells 40 are stacked in such a manner that the front - rear direction orientations are alternately reversed, the safety valves 44 can be gathered at the same position in the front - rear direction.

[0054] Return Figure 2The 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.

[0055] An opening 86a is provided on the left wall portion 86 to connect the single cell housing space 25 with the outside, and a pressure plate 28 is installed 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 plate 31 of each single cell stack 30 from the opening 86a. The pressure plate 28 presses the end plate 31 inward, whereby the single cell stack 30 temporarily fixed by the plate clamp 50 at a predetermined pressure is further pressurized in the stacking direction and retained in the shell 20. The fixing of the pressure plate 28 to the left wall portion 86 may be based on welding such as friction stir welding, or may be bolted. In this way, in the battery pack 10, a plurality of single cells 40 can be retained in the shell 20 without modularization, thereby improving energy density and space efficiency.

[0056] In addition, if Figure 1 As shown, two pressure release valves 13 are provided on the pressurizing plate 28, each of which is connected to the cell housing space 25. When the internal pressure of the cell housing space 25 abnormally rises 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.

[0057] In addition, a bulge 22 is formed in front of and to the left of the front wall 82 so as to protrude further forward from the front wall 82. The bulge 22 has a space formed inside, 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 connected to the extraction conductive member 70 is provided in the internal space of the bulge 22, forming an output terminal accommodating space 27. The terminal block 60 is arranged on the inner side of the housing 20, so that the terminal block 60 can be prevented from colliding with other objects on the outer side of the housing 20.

[0058] In 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 that enters 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 laminates 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 the positive terminal and the negative terminal of an external device, for example. The battery pack 10 can deliver the power stored in the single cell 40 to the external device by connecting the extraction conductive member 70 to the external device (load).

[0059] Thus, inside the housing 20, there are provided: a single cell accommodation space 25 that accommodates two single cell laminates 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 laminates 30 accommodated in the single cell accommodation space 25 may be one or three or more.

[0060] The height of the region in the front wall portion 82 that separates the single cell accommodation space 25 from the output terminal accommodation space 27 (hereinafter, this portion is referred to as the partition portion 85) 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.

[0061] A signal line connector 67 is provided in the output terminal accommodation space 27. The signal line connector 67 is connected to a signal line via a through hole that communicates the single cell accommodation space 25 with the output terminal accommodation space 27.

[0062] Here, with reference to Figure 4 and Figure 5 the structure near the terminal block 60 will be described in detail. As Figure 4 shown, the terminal block 60 has: a positive side connection portion 60a that electrically connects the terminal portion of the positive side bus bar 62 to the terminal portion of the positive side bus bar 72; and a negative side connection portion 60b that electrically connects the terminal portion of the negative side bus bar 63 to the terminal portion of the negative side bus bar 73. The positive side connection portion 60a and the negative side connection portion 60b are arranged adjacent to each other.

[0063] In the positive electrode side connection portion 60a, the terminal portion of the positive electrode side bus bar 62 and the terminal portion of the positive electrode side bus bar 72 are fastened by, for example, a bolt B. Similarly, in the negative electrode side connection portion 60b, the terminal portion of the negative electrode side bus bar 63 and the terminal portion of the negative electrode side bus bar 73 are fastened by, for example, a bolt B. Here, the terminal portions of the respective bus bars may be circular (R-shaped) or front-opening (Y-shaped). In addition, the connection between the terminal portions is not limited to bolt fastening, and any connection method can be adopted.

[0064] A protection member 65 is provided in the output terminal accommodation space 27 and is formed of an insulating material to protect the terminal block 60. In the present embodiment, the protection member 65 has a semi-cylindrical shape.

[0065] The protection member 65 includes: a main body portion 651 having a semi-cylindrical shape; two opening portions 652a, 652b provided in the main body portion 651; a sliding cover 653 that selectively covers either one of the two opening portions 652a, 652b by sliding movement; and a partition plate 654 provided between the positive electrode side connection portion 60a and the negative electrode side connection portion 60b.

[0066] The main body portion 651 is fixed to, for example, the partition portion 85 and is provided so as to surround the terminal block 60. Inside the main body portion 651, the positive electrode side connection portion 60a and the negative electrode side connection portion 60b of the terminal block 60, the terminal portion of the output conductive member 61, and the terminal portion of the extraction conductive member 70 are arranged.

[0067] On the curved surface portion of the main body portion 651, the two opening portions 652a, 652b are respectively provided at positions facing the positive electrode side connection portion 60a and the negative electrode side connection portion 60b. Each opening portion 652a, 652b has a shape with a notch formed at the lower end and has a size that allows the terminal portions of the positive electrode side bus bar 72 and the negative electrode side bus bar 73 to pass through.

[0068] The sliding cover 653 is a curved plate member provided along the curved surface of the main body portion 651 and is provided so as to be able to slide along the curved surface of the main body portion 651. The sliding cover 653 is larger than each of the opening portions 652a, 652b in the sliding direction.

[0069] The sliding cover 653 selectively covers either the positive electrode side connection portion 60a or the negative electrode side connection portion 60b by sliding movement. Figure 4 shows a state where the sliding cover 653 covers the positive electrode side connection portion 60a, Figure 5 shows a state where the sliding cover 653 covers the negative electrode side connection portion 60b.

[0070] Guide rail portions 655 having arc-shaped grooves are provided at the upper and lower portions of the main body portion 651, and the sliding cover 653 is engaged with the guide rail portions 655 in a slidable manner. Specifically, protrusions that engage with the grooves of the guide rail portions 655 are provided at the upper and lower end portions of the sliding cover 653, and the protrusions of the sliding cover 653 are inserted into the guide rail portions 655 in a slidable manner. However, the engagement between the guide rail portions 655 and the sliding cover 653 is not limited to this. For example, it may also be that the guide rail portions 655 have arc-shaped protrusions, and grooves that engage with the protrusions of the guide rail portions 655 are provided at the upper and lower end portions of the sliding cover 653.

[0071] Since the protection member 65 has the sliding cover 653, when an operator uses a tool to electrically connect the extraction conductive member 70 to the output conductive member 61, a short circuit at the terminal block 60 can be prevented. More specifically, when the operator connects the negative bus bar 73 to the negative side connection portion 60b and bolts the negative bus bar 63 to the negative bus bar 73, as Figure 4 shown, the negative side connection portion 60b is exposed from the opening portion 652b. On the other hand, the positive side connection portion 60a is covered by the sliding cover 653. Thus, during the bolting of the negative side connection portion 60b, it is possible to prevent the tool and the negative bus bar 73 from also coming into contact with the positive side connection portion 60a and causing a short circuit. Similarly, when the operator connects the positive bus bar 72 to the positive side connection portion 60a and bolts the positive bus bar 62 to the positive bus bar 72, as Figure 5 shown, the positive side connection portion 60a is exposed from the opening portion 652a. On the other hand, the negative side connection portion 60b is covered by the sliding cover 653. Thus, during the bolting of the positive side connection portion 60a, it is possible to prevent the tool and the positive bus bar 72 from coming into contact with the negative side connection portion 60b and causing a short circuit.

[0072] In this way, the protection member 65 can prevent a short circuit at the terminal block 60 and protect the terminal block 60 during the connection operation of the output conductive member 61 and the extraction conductive member 70 by using a simple structure having the sliding cover 653 that selectively covers the positive side connection portion 60a or the negative side connection portion 60b.

[0073] In addition, in the present embodiment, since the protection member 65 has a semi-cylindrical shape, a compact structure can be formed compared to protection members of other shapes (such as a rectangular parallelepiped shape). Further, the shape of the protection member 65 is not limited to the semi-cylindrical shape. For example, it may also be the above-mentioned rectangular parallelepiped shape. In this case, the sliding cover 653 is formed of, for example, a flat plate member and slides along the plane of the rectangular parallelepiped-shaped protection member 65.

[0074] In addition, the sliding cover 653 is configured to be larger than each of the opening portions 652a and 652b in the sliding direction. Therefore, even when the sliding cover 653 is offset in the sliding direction during the connection operation between the bus bars, the sliding cover 653 can maintain the state of covering the positive-side connection portion 60a or the negative-side connection portion 60b.

[0075] In addition, the terminal portion of the positive-side bus bar 62 and the terminal portion of the positive-side bus bar 72 are fastened by bolts, and the terminal portion of the negative-side bus bar 63 and the terminal portion of the negative-side bus bar 73 are fastened by bolts. Therefore, the bus bars can be firmly connected to each other by the bolt fastening pressure.

[0076] The partition plate 654 is provided integrally with the main body portion 651 and separates the positive-side connection portion 60a and the negative-side connection portion 60b. Since the protective member 65 has the partition plate 654, it is possible to more reliably prevent a short circuit from occurring during the connection operation between the output conductive member 61 and the extraction conductive member 70 at the positive-side connection portion 60a or the negative-side connection portion 60b.

[0077] The entire protective member 65 is disposed inside the housing 20. Specifically, it is disposed in the output terminal accommodation space 27 and does not protrude from the first opening portion 91 to the outside of the housing 20. Thereby, the compactification of the battery pack 10 can be achieved.

[0078] Return Figure 2 , in addition to the partition portion 85, a housing cover 23 is mounted on the upper surface of the housing 20 with a first seal 11 (e.g., 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 (e.g., 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 suppress 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 also in the gap between the through hole provided in the partition portion 85 and the signal line.

[0079] The battery pack 10 configured as described above does not include auxiliary devices such as a junction box for accommodating contactors, fuses, and an ECU. Therefore, when the battery pack 10 is used alone, the junction box and / or the ECU can be connected to the battery pack 10. In addition, when a plurality of battery packs 10 are used, the battery packs 10 can also be electrically connected to each other through a connection box, and the junction box and / or the ECU can be connected to the connection box. In addition, the junction box and / or the ECU can also be incorporated in the connection box, and a plurality of battery packs 10 can be connected to the junction box and / or the ECU in the connection box.

[0080] Next, referring to Figures 6 to 9, the mounting structure of four battery packs 10 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.

[0081] In this mounting structure, as Figure 6 and Figure 7 shown, between the left frame 110L and the right frame 110R extending in the front-rear direction of the vehicle, a central frame 120 extending in the vehicle width direction is fixed. In addition, the above two battery packs 10 are arranged side by side in the space in front of the central frame 120, and the above two battery packs 10 are arranged side by side in the space behind the central frame 120. The four battery packs 10 are fixed and supported by the left frame 110L, the right frame 110R, and the central frame 120. Hereinafter, this structure will be referred to as the battery pack assembly 100.

[0082] [Battery Pack Assembly]

[0083] In the battery pack assembly 100, the two front battery packs 10 are arranged such that the bulging portion 22 is located at the rear and to the right, and the two rear battery packs 10 are arranged such that the bulging portion 22 is 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 rotated 180° so that the bulging portions 22 face each other in the front-rear direction with the central frame 120 therebetween.

[0084] As Figure 8 shown, the central frame 120 of the battery pack 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.

[0085] 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 are respectively communicated with the first opening portions 91 of the bulging portions 22 of the rear battery packs 10. The front communication holes 121a and the rear communication holes 122a are offset in the vehicle width direction. That is, the center positions of the front communication holes 121a in the vehicle width direction and the center positions of the rear communication holes 122a in the vehicle width direction are offset in the vehicle width direction.

[0086] Around the front communication hole 121a and the rear communication hole 122a, fastening parts 123 for liquid-tightly fastening the corresponding battery packs 10 are respectively provided. For example, by bolt fastening, each battery pack 10 is fixed to the central frame 120. The central frame 120 has fastening parts 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 in the cross-section cut along the front-rear direction, it has a high-rigidity cross-sectional shape like an H-beam.

[0087] The extraction conductive member 70 is taken out and enters the hollow area 125 of the central frame 120 through the first opening 91 from the output terminal accommodation space 27 formed in the bulging part 22 of each battery pack 10. As Figure 7 shown, a bus bar unit 140 is arranged in the hollow area 125 of the central frame 120. The bus bar unit 140 includes, for example, a plurality of connecting bus bars, and electrically connects four battery packs 10 in series, for example. The bus bar unit 140 is electrically connected to an external device such as a motor, and delivers the electric power stored in each battery pack 10 to the external device. This situation is omitted from the illustration. Here, the central frame 120 is an example of the above-mentioned connection box.

[0088] A bottom surface opening 124 is provided on the back surface of the central frame 120, and the bottom surface opening 124 is liquid-tightly closed by a bottom surface cover 126 with a sealing member (not shown) interposed therebetween. Since the bottom surface opening 124 of the central frame 120 is liquid-tightly closed by the bottom surface cover 126, and the communication holes 121a and 122a of the central frame 120 are liquid-tightly fastened to the first openings 91 of each battery pack 10, moisture is restricted from entering the output terminal accommodation space 27 of the battery pack 10 and the hollow area 125 of the central frame 120 from the outside.

[0089] In a state where the bottom surface cover 126 is removed, the extraction conductive member 70 extending from each battery pack 10 to the hollow area 125 of the central frame 120 is fastened to the bus bar unit 140 from the bottom surface opening 124. When electrically connecting the extraction conductive member 70 and the bus bar unit 140 by bolt fastening, for example, the above-mentioned protection member 65 can also be installed at the connection part between the terminal part of the extraction conductive member 70 and the terminal part of the bus bar unit 140.

[0090] Specifically, as Figure 9 shown, the protection member 65 can also be installed at the terminal part on the side of the bus bar unit 140 of the positive bus bar 72 and the negative bus bar 73. The sliding cover 653 can also slide and move so as to cover either one of the terminal parts of the positive bus bar 72 and the negative bus bar 73 connected to the bus bar unit 140. With such a structure, during the operation of electrically connecting the extraction conductive member 70 and the bus bar unit 140 by bolt fastening by an operator, a short circuit can be prevented from occurring.

[0091] The battery assembly 100 configured in this way is fixed to the frame member of the vehicle by a pair of central support portions 128 provided on the central frame 120 and side support portions 111 provided on the left frame 110L and the right frame 110R, and is disposed under the floor of the vehicle.

[0092] As described above, an embodiment of the present invention has been described with reference to the drawings. However, the present invention is of course not limited to this embodiment. Those skilled in the art should understand that various modification examples or correction examples can obviously be conceived within the scope described in the technical solution, and these modification examples or 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-described embodiment can be arbitrarily combined.

[0093] For example, in the above-described embodiment, the terminal block 60 has two connection portions, i.e., a positive-side connection portion 60a that connects the positive-side bus bar 62 and the positive-side bus bar 72, and a negative-side connection portion 60b that connects the negative-side bus bar 63 and the negative-side bus bar 73. However, it may have two or more connection portions. For example, in addition to the positive-side connection portion 60a and the negative-side connection portion 60b to which the above-described positive-side bus bar 72 and negative-side bus bar 73 are connected, the terminal block 60 may also have other positive-side connection portions and negative-side connection portions, and the other positive-side connection portions and negative-side connection portions are connected to a positive-side bus bar and a negative-side bus bar capable of supplying power to an external device.

[0094] In addition, when the terminal block 60 has two or more connection portions, the above-described protection member 65 can also be provided. In this case, the sliding cover 653 of the protection member 65 may selectively cover any one of the two or more connection portions by sliding movement.

[0095] At least the following matters are described in this specification. In parentheses, corresponding constituent elements, etc. in the above-described embodiment are shown as an example, but the present invention is not limited thereto.

[0096] (1) A battery pack (battery pack 10), comprising:

[0097] A plurality of stacked single cells (single cell 40);

[0098] A housing (housing 20) that houses the plurality of single cells;

[0099] A terminal block (terminal block 60) that is connected to at least two first conductive members (positive-side bus bar 62, negative-side bus bar 63) extending from the terminal portions (terminal portions 42) of the single cells; and

[0100] A protective component (protective component 65) that protects the terminal block,

[0101] wherein,

[0102] the terminal block has at least two connection parts (positive-side connection part 60a, negative-side connection part 60b) that connect the at least two first conductive components to at least two second conductive components (positive-side bus bar 72, negative-side bus bar 73), and the second conductive components are electrically connected to an external device,

[0103] the at least two connection parts are arranged adjacent to each other,

[0104] the protective component has a sliding cover (sliding cover 653) that selectively covers any one of the at least two connection parts by sliding movement.

[0105] According to (1), by covering any one of the connection parts of the terminal block arranged adjacent to each other with the sliding cover, when an operator connects a first conductive component and a second conductive component at a connection part not covered by the sliding cover, it is possible to prevent a short circuit between adjacent connection parts. Therefore, it is possible to ensure the safety of the operation of electrically connecting the battery pack to an external device with a simple structure.

[0106] (2) The battery pack according to (1), wherein,

[0107] the protective component has a semi-cylindrical shape,

[0108] the sliding cover slides along the curved surface of the protective component.

[0109] According to (2), it is possible to make the protective component have a compact structure.

[0110] (3) The battery pack according to (1) or (2), wherein,

[0111] the protective component has at least two opening parts (opening parts 652a, 652b) that expose the at least two connection parts respectively,

[0112] the sliding cover selectively covers the at least two opening parts,

[0113] the sliding cover is larger than each opening part in the sliding direction.

[0114] According to (3), even when the sliding cover is offset in the sliding direction when connecting the first conductive component and the second conductive component, it is possible to maintain the state where the sliding cover covers any one of the connection parts.

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

[0116] The first conductive component and the second conductive component are connected by being fastened with bolts at the connection part.

[0117] According to (4), the first conductive component and the second conductive component can be firmly connected by the bolt fastening pressure.

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

[0119] The protection component further has a partition plate (partition plate 654) provided between adjacent connection parts of the terminal block.

[0120] According to (5), when an operator performs an operation of connecting the first conductive component and the second conductive component at the connection part of the terminal block, a short circuit between adjacent connection parts can be more reliably prevented.

[0121] (6) The battery pack according to any one of (1) to (5), wherein

[0122] The terminal block is arranged inside the housing,

[0123] A housing opening (first opening 91) for exposing the terminal block is provided in a side wall portion (front wall portion 82) of the housing.

[0124] According to (6), since the terminal block is arranged inside the housing, collision of the terminal block with other objects can be avoided.

Claims

1. A battery pack, comprising: A plurality of stacked single cells; A housing that houses the plurality of single cells; A terminal block to which at least two first conductive members extending from the terminal portions of the single cells are connected; and A protection member that protects the terminal block, wherein The terminal block has at least two connection portions that connect the at least two first conductive members to at least two second conductive members, and the second conductive members are electrically connected to an external device, The at least two connection portions are arranged adjacent to each other, The protection member has a sliding cover that selectively covers any one of the at least two connection portions by sliding movement.

2. The battery pack according to claim 1, wherein The protection member has a semi-cylindrical shape, The sliding cover slides along the curved surface of the protection member.

3. The battery pack according to claim 1 or 2, wherein The protection member has at least two opening portions that expose the at least two connection portions respectively, The sliding cover selectively covers the at least two opening portions, The sliding cover is larger than each opening portion in the sliding direction.

4. The battery pack according to claim 1 or 2, wherein The first conductive member and the second conductive member are connected by bolt fastening at the connection portion.

5. The battery pack according to claim 1 or 2, wherein The protection member further has a partition plate provided between adjacent connection portions of the terminal block.

6. The battery pack according to claim 1 or 2, wherein The terminal block is disposed inside the housing, A housing opening portion for exposing the terminal block is provided in the side wall portion of the housing.

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