JP7107034B2 - Battery terminal connection structure - Google Patents

Description

The present invention relates to a terminal connection structure for a battery.

In Patent Document 1, a first terminal on the power source side and a second terminal on the rotating electrical machine side are connected in a terminal block interposed in a power supply path that transmits power from the power source to the rotating electrical machine. An electric vehicle is disclosed in which a power supply path between a power source and a rotating electric machine is electrically connected.

Patent No. 4548129

The terminal block configured as described in Patent Document 1 is configured to connect one rotating electrical machine to a power source, such as a front-wheel drive vehicle. Here, in a vehicle further equipped with a rotating electrical machine for driving the rear wheels, it is necessary to configure a new power supply path from the power source to the rotating electrical machine for driving the rear wheels. There is a problem that the cost increases due to the change or the like.

SUMMARY OF THE INVENTION The present invention has been made to address such a problem, and a plurality of power control devices are provided at a connection terminal serving as a power supply path between a battery and a power control device for controlling a rotating electric machine without increasing the cost. It is an object of the present invention to provide a battery terminal connection structure capable of supplying power to a device.

The terminal connection structure provided outside the battery according to one embodiment of the present invention includes a power terminal protruding outside the battery for inputting and outputting power of the battery, and electrically connecting the power terminal and the first power control device. A terminal block to which a first power wiring to be connected and a second power wiring to be electrically connected to the power terminal and the second power control device are respectively connected is provided. The terminal block includes a connection member, which is a conductive member and connects one end of the first power wiring and the power terminal, and connects one end of the second power wiring and the power terminal . The connection member is a shaft-shaped member extending in the projecting direction of the power terminal, and has a first connection portion at its lower portion for electrically connecting the first power wiring to the power terminal, and a second power wiring at its upper portion. to the power terminal.

According to the present invention, the battery suitable for the first power control device is provided with a connection member that connects one end of the first power wiring and the power terminal and connects one end of the second power wiring and the power terminal. Power wiring can be added to the second power controller in addition to the first power controller without changing the structure of .

FIG. 1 is an explanatory diagram showing the configuration of an electric vehicle according to an embodiment of the invention. FIG. 2 is a perspective view for explaining the battery terminal block according to the embodiment of the present invention. FIG. 3 is a top view for explaining the battery terminal block according to the embodiment of the present invention. FIG. 4A is an explanatory diagram of a hexagonal bolt according to an embodiment of the present invention. FIG. 4B is an explanatory diagram of the hexagonal bolt according to the embodiment of the present invention. FIG. 5 is an explanatory diagram of a power wiring connection structure using a hexagonal bolt according to the embodiment of the present invention. FIG. 6 is a perspective view for explaining the fuse box according to the embodiment of the invention. FIG. 7 is a perspective view for explaining the busbar according to the embodiment of the present invention. FIG. 8A is an explanatory perspective view of a cover according to an embodiment of the present invention; FIG. 8B is an illustrative perspective view of a cover according to an embodiment of the present invention; FIG. 8C is an illustrative perspective view of a cover according to an embodiment of the present invention; FIG. 9 is a perspective view showing an attached state of the cover according to the embodiment of the invention. FIG. 10 is an explanatory diagram showing the safety area according to the embodiment of the invention. FIG. 11A shows a cross-sectional view of a terminal block in a modification of the embodiment of the invention. FIG. 11B shows a cross-sectional view of a terminal block in a modification of the embodiment of the invention. FIG. 11C shows a cross-sectional view of a terminal block in a modification of the embodiment of the invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.

This embodiment is applied to an electric vehicle that runs by driving an electric motor with electric power charged in a battery, for example. The electric vehicle is not limited to an electric vehicle (EV), and may be a hybrid vehicle (HEV) also equipped with an engine.

FIG. 1 is an explanatory diagram showing the configuration of an electric vehicle according to this embodiment.

An electric vehicle 1 of the present embodiment includes a battery module 2 , a front wheel control device 3 and a rear wheel control device 4 .

The battery module 2 supplies electric power to rotating electric machines (electric motors) connected to the front wheel control device 3 and the rear wheel control device 4, or receives regenerated power from the electric motors and is charged. The battery module 2 is configured by housing a battery body 2a configured by stacking a plurality of batteries in a case 2b. The battery module 2 is mounted near the floor of the front seat of the electric vehicle 1 .

The front wheel control device 3 includes an inverter, a DC-DC converter, and the like, and is configured as a first power control device that controls power of an electric motor that drives the front wheels of the electric vehicle. The front wheel control device 3 controls the electric power supplied from the battery module 2 to control the driving force of the electric motor, thereby causing the electric vehicle 1 to run. The front wheel control device 3 is housed in the bonnet on the front side of the electric vehicle 1 .

Like the front wheel control device 3, the rear wheel control device 4 includes an inverter, a DC-DC converter, and the like, and is configured as a second power control device that controls the electric power of the electric motor that drives the rear wheels of the electric vehicle 1. be. The rear-wheel control device 4 controls the electric power supplied from the battery module 2 to control the driving force of the electric motor, thereby assisting the running of the electric vehicle 1 by the front-wheel control device 3 . The rear wheel control device 4 is installed near the lower portion of the trunk on the rear side of the electric vehicle 1 .

The battery module 2 has power terminals for inputting and outputting power. The power terminals include a set of positive and negative high voltage terminals for supplying high voltage (for example, 400 V) power to the front wheel control device 3 and the rear wheel control device 4, a set of high voltage positive terminals and a high voltage negative terminal for supplying power to the front wheel control device 3 and the rear wheel control device 4; a low voltage positive terminal comprising two positive electrodes for supplying low voltage (eg 12V) power to the battery. The negative terminal of the low voltage terminal is used as body ground.

For safety reasons, the battery module 2 does not have a portion through which electric power flows other than the high-voltage positive terminal, the high-voltage negative terminal, and the low-voltage positive terminal. The high-voltage positive terminal, the high-voltage negative terminal, and the low-voltage positive terminal are housed in a terminal block 5 arranged on the upper part of the battery module 2 and outside the battery module 2 .

FIG. 2 is a perspective view for explaining the terminal block 5 having the terminal connection structure of this embodiment, and FIG. 3 is a top view for explaining the terminal block 5 of this embodiment.

The terminal block 5 includes a housing 11 that accommodates a high voltage positive terminal 51 , a high voltage negative terminal 52 and two low voltage positive terminals 53 , 53 . The housing 11 is made of an insulating resin or the like, and holds these terminals at appropriate insulating intervals.

The high-voltage positive terminal 51, the high-voltage negative terminal 52, and the two low-voltage positive terminals 53, 53 are configured as bolt-shaped members each having a male screw. This male screw portion is exposed to the outside of the battery module 2 and protrudes upward from the terminal block 5 .

A low-voltage harness 55 that is a low-voltage power wiring is connected to each of the two low-voltage positive terminals 53 , 53 . An eyelet 55a is fixed to the tip of the low-voltage harness 55, and the low-voltage positive terminal 53 is inserted through the hole of the eyelet 55a and the nut 53a is fastened to connect the low-voltage positive terminal 53 to the low-voltage positive terminal 53. 53.

A positive bus bar 31 and a negative bus bar 32, which are ends of a first high voltage power wiring for supplying power to the front wheel controller 3, are attached to the high voltage positive terminal 51 and the high voltage negative terminal 52, respectively. These are fixed by hexagon bolts 70, respectively, as will be described later.

The positive electrode bus bar 31 is formed in a shape suitable for the positive electrode side groove 12 formed in the housing 11 . The positive electrode bus bar 31 has a fastening hole 31a, and is fixed by a hexagon bolt 70 in a state in which the fastening hole 31a is inserted into the positive electrode terminal 51 for high voltage (see FIG. 5). One end of a harness (not shown) is fixed to the other end of the positive bus bar 31 by screwing or welding. The other end of the harness is connected to the positive electrode of the inverter of the front wheel control device 3, for example.

Like the positive bus bar 31, the negative bus bar 32 is also formed in a shape along the negative groove 13 formed in the housing 11, and has fastening holes 32a like the positive bus bar. The negative bus bar 32 is fixed by a hexagon bolt 70 in a state in which the high voltage negative terminal 52 is inserted into the fastening hole 32a. One end of a harness (not shown) is fixed to the other end of the negative bus bar 32 by screwing or welding. The other end of the harness is connected to the negative pole of the inverter of the front wheel controller 3, for example.

A second rear-wheel power wiring that supplies electric power to the rear-wheel control device 4 is fixed to a rear-wheel wiring connection portion 72 (see FIG. 4 ) formed above the hexagonal bolt 70 . A fuse box 6 having a fuse 66 is interposed in the second power wiring. The details will be described below.

If the electric vehicle 1 is a front-wheel drive vehicle, power needs to be supplied only to the front wheel control device 3. Therefore, as described above, the front wheel control device 3 is connected to the high voltage positive terminal 51 and the high voltage negative terminal 52. A power wiring (first power wiring) for supplying power to the . In this case, by fixing the positive electrode bus bar 31 and the negative electrode bus bar 32 to the high voltage positive terminal 51 and the high voltage negative terminal 52 with nuts or the like, the first electric power is transferred between the terminal block 5 and the front wheel controller 3 . Wiring is connected.

Here, consider a case where the electric vehicle 1 is configured to include the rear wheel control device 4 so as to drive the rear wheels. The terminal block 5 is provided with only one set of high-voltage positive terminal 51 and high-voltage negative terminal 52 as high-voltage terminals. Therefore, in addition to the power wiring for the front wheel control device 3, it is necessary to connect the second power wiring for the rear wheel control device 4 to this set of terminals. Further, the second power wiring is provided with a safety wire so as not to hinder the supply of electric power to the front wheel control device 3 in the event of a failure in the rear wheel control device 4 (to ensure the running performance of the electric vehicle 1). It is necessary to add a device (fuse). Therefore, it is necessary to devise a wiring configuration.

Therefore, for example, it is possible to add a new terminal for supplying electric power to the rear wheel controller 4 and a safety device inside the battery module 2 . However, in this case, the structure of the battery module 2 is significantly changed, so there is a problem of an increase in cost.

In this embodiment, the connection structure of the terminal block 5 is changed without changing the configuration of the battery module 2 from that used in the front-wheel drive vehicle, thereby making it compatible with the front-rear wheel-drive electric vehicle 1 .

4A and 4B are explanatory diagrams of the hexagonal bolt 70 of this embodiment, and FIG. 5 is an explanatory diagram of a connection structure to the high-voltage positive electrode terminal 51 by the hexagonal bolt 70 of this embodiment.

The hexagon bolt 70 is made of a conductive material such as iron or carbon steel. The hexagon bolt 70 may have its surface subjected to antirust treatment such as zinc plating or nickel plating.

The hexagon bolt 70 has a first connecting portion for fixing the high-voltage positive electrode terminal 51 to its lower portion. The first connection portion comprises a front wheel wire connection portion 71 into which the high voltage positive electrode terminal 51 is inserted from below, and the front wheel wire connection portion 71 includes a nut portion 71a into which the high voltage positive electrode terminal 51 is inserted. ing. A female screw is formed on the inner peripheral surface of the nut portion 71a, and the front wheel wiring connection portion 71 is configured as a nut-shaped member.

A second connection portion is provided at the upper end of the first connection portion of the hexagon bolt 70 . The second connecting portion is formed so as to abut vertically from the upper end of the front wheel wiring connecting portion 71, and has a rear wheel wiring connecting portion 72 having a bolt-shaped member 72a into which the rear wheel positive bus bar 41 is inserted. is configured as

Since the hexagon bolt 70 is configured in this way, the female thread shape of the front wheel wiring connection portion 71 of the hexagon bolt 70 corresponds to the male thread of the positive electrode terminal 51 for high voltage with respect to the positive electrode terminal 51 for high voltage of the terminal block 5 . The positive electrode bus bar 31 is fixed by screwing into the . Further, the rear wheel positive bus bar 41 is fixed by screwing the male screw of the rear wheel wiring connection portion 72 of the hexagon bolt 70 with a nut 73 .

The hexagonal bolt 70 is also used for the high-voltage negative electrode terminal 52 of the terminal block 5 . The negative electrode bus bar 32 is fixed to the high voltage negative terminal 52 of the terminal block 5 by screwing the female screw shape of the front wheel wiring connection portion 71 of the hexagon bolt 70 into the male screw of the high voltage negative terminal 52 . Furthermore, the male screw of the rear wheel wiring connection portion 72 of the hexagon bolt 70 is screwed with a nut 73 to fix the rear wheel negative electrode harness 42 (see FIG. 3).

In this manner, the terminal block 5 of the present embodiment is configured by fixing the hexagon bolt 70 to each of the high-voltage positive terminal 51 and the high-voltage negative terminal 52, so that the front wheel wiring connection portion 71 on the lower surface side of the hexagon bolt 70 is fixed. , the positive bus bar 31 and the negative bus bar 32, which are the power wiring to the front wheel control device 3, are fixed. The rear wheel wiring connection portion 72 on the upper end side of the hexagon bolt 70 is configured to fix the rear wheel positive bus bar 41 and the rear wheel negative harness 42 which are power wiring to the rear wheel control device 4 .

With such a configuration, power wiring can be added to the rear wheel control device 4 by using the battery module 2 suitable for a front-wheel drive vehicle without changing the structure of the battery module 2 .

In the terminal block 5, the high-voltage positive terminal 51 and the high-voltage negative terminal 52 have an M8 male screw shape, and the front wheel wiring connection portion 71 of the hexagon bolt 70 corresponds to an M8 female screw. It has a screw shape. On the other hand, the rear wheel wiring connection portion 72 of the hexagon bolt 70 has an M6 male thread shape.

By forming the screw diameter of the rear wheel wiring connection portion 72 to be smaller than the screw diameter of the front wheel wiring connection portion 71 in this way, the hexagonal bolt 70 can be connected to the high voltage positive terminal 51 and the high voltage negative The tightening torque on the lower side fixed to the terminal 52 is set to be greater than the tightening torque on the rear wheel wiring connection portion 72 on the upper side. As a result, for example, when the upper nut is removed, the lower screw is prevented from coming off first, improving workability.

FIG. 6 is a perspective view for explaining the fuse box 6 of this embodiment.

The fuse box 6 is a safety device for the rear wheel control device 4 that is interposed in the power wiring on the positive electrode side of the rear wheel control device 4 connected to the terminal block 5 .

The fuse box 6 includes a housing 61 , input terminals 62 , output terminals 63 , fuse covers 64 , brackets 65 and fuses 66 .

The fastening hole 41b of the rear wheel positive bus bar 41 is fixed to the input terminal 62 (see FIG. 5). The output terminal 63 is connected to the rear wheel positive harness 43 that is connected to the rear wheel controller 4 (see FIG. 3). The fuse 66 is provided between the input terminal 62 and the output terminal 63, and functions as a safety device that cuts off the power wiring when overcurrent occurs in the power wiring of the rear wheel control device 4. FIG.

A fuse cover 64 is provided above the fuse 66 to prevent water and dust from entering the fuse 66 from above.

Slanted portions 64a are formed at both longitudinal ends of the fuse cover 64 so as to allow water falling from above to flow downward.

A housing 61 holds these input terminal 62 , output terminal 63 , fuse cover 64 and fuse 66 . The bracket 65 supports the housing 61 and fixes the fuse box 6 to a console box mounted in the passenger compartment of the electric vehicle 1 .

FIG. 7 is a perspective view for explaining the rear wheel positive bus bar 41 according to the embodiment of the present invention.

The rear wheel positive bus bar 41 includes a fastening hole 41 a fixed to the high voltage positive terminal 51 of the terminal block 5 and a fastening hole 41 b fixed to the input terminal 62 of the fuse box 6 .

Further, the rear wheel positive bus bar 41 is provided with an upper cover 411 and a lower cover 412 . The upper cover 411 and the lower cover 412 are made of a non-conductive resin or the like, and prevent portions other than the fastening holes 41a and 41b of the rear wheel positive bus bar 41 from being exposed to the outside. Fixing portions 411 a and 411 b for fixing the rear wheel negative electrode harness 42 are formed on the upper surface of the upper cover 411 .

The rear wheel positive bus bar 41 has a crank shape between the high voltage positive terminal 51 and the input terminal 62 of the fuse box 6 .

More specifically, when the terminal block 5 is viewed horizontally (see FIG. 5), the rear-wheel positive bus bar 41 is crank-shaped with respect to a line segment connecting the center of the high-voltage positive terminal 51 and the center of the input terminal 62 . It is configured by bending to In addition, when viewed from the top of the terminal block 5 (see FIG. 3), it is bent in a crank shape with respect to a line connecting the center of the high-voltage positive electrode terminal 51 and the center of the input terminal 62 .

By configuring the rear wheel positive bus bar 41 in the crank shape in this manner, vibrations or the like may occur between the terminal block 5 fixed to the battery module 2 and the fuse box 6 fixed to the resin part of the console box. Displacement and twisting of the positional relationship can be buffered, and breakage of the terminal block 5 and the rear wheel positive bus bar 41 can be prevented.

8A is a top perspective view for explaining the terminal block cover 8 of this embodiment, and FIG. 8B is a perspective view of the back side of the terminal block cover 8. FIG. 8C is a perspective view for explaining the engagement between the terminal block cover 8 and the fuse box 6. FIG.

The terminal block cover 8 covers the terminals of the terminal block 5 from above to prevent the terminals of the terminal block 5 from being exposed, thereby preventing the entry of foreign substances such as water and dust, and facilitating maintenance of the terminal block. 5 can be easily opened.

The terminal block cover 8 includes a hinge portion 81 , a bulging portion 82 , a bolt fixing hole 83 , a harness fixing portion 84 and a canopy portion 85 .

The terminal block cover 8 is rotatably fixed to the housing 11 of the terminal block 5 by the hinge portion 81 , and fixed to the terminal block 5 by inserting a bolt through the bolt fixing hole 83 .

The terminal block cover 8 has a bulging portion 82 that bulges upward. The bulging portion 82 accommodates the hexagonal bolt 70 projecting upward from the terminal block 5 , the rear wheel positive bus bar 41 , and the rear wheel negative harness 42 . The harness fixing portion 84 fixes a fastener for a harness passing above the terminal block cover 8 .

The eaves portion 85 has a shape projecting downward from the terminal block cover 8 and is configured to be positioned directly above the fuse cover 64 of the fuse box 6 .

As shown in FIG. 8C , the terminal block cover 8 covers the terminal block 5 and engages with the fuse cover 64 of the fuse box 6 to prevent water and dust from entering the fuse 66 .

The positional relationship between the terminal block cover 8 fixed to the terminal block 5 and the fuse box 6 fixed to the console box may shift due to vibration or the like. Therefore, the positional relationship between the eaves portion 85 and the fuse cover 64 is configured with some play.

The bulging portion 82 of the terminal block cover 8 is provided so as to be arranged in the safety area of the electric vehicle 1 as will be described later with reference to FIG. 10 .

9 is a perspective view showing a state where a cover is attached to the terminal block according to the embodiment of the present invention, and FIG. 10 is a cross-sectional view taken along line XX in FIG. 9 (as viewed from the front of the vehicle).

The terminal block 5 provided outside the battery module 2 is the only place where the power of the battery module 2 is output. Therefore, even if the electric vehicle 1 is damaged due to an accident or the like, it is desirable that the terminal block 5 is not easily exposed.

In the present embodiment, the terminal block 5 is located in the vicinity of the intersection of the longitudinal member in the left-right direction and the longitudinal member in the front-rear direction of the electric vehicle 1, and other parts outside the terminal block 5 are prevented from entering even in the event of a collision. It is provided within the safety area, which is an area. More specifically, the terminal block 5 is provided within the safety area below the center console of the electric vehicle 1 .

Furthermore, the terminal block cover 8 that covers the terminal block 5 is formed in a bulging shape along the shape of the safety area and the shape that does not interfere with the center console.

With such a configuration, even if the electric vehicle 1 is deformed due to an accident or the like, the terminal block 5 can be prevented from being damaged by other parts entering, and safety can be ensured.

The terminal connection structure provided outside the battery module 2 in the embodiment of the present invention configured as described above includes a high-voltage positive terminal 51 and a high-voltage negative terminal 51, which are power terminals for inputting and outputting electric power of the battery module 2. 52, a first power wiring electrically connecting the high voltage positive terminal 51 and the high voltage negative terminal 52 to the front wheel control device 3 which is the first power control device, the high voltage positive terminal 51 and the high voltage negative terminal 52; and a second power wiring electrically connected to the rear wheel control device 4 which is the second power control device. The terminal block 5 is a conductive member, and connects the positive electrode bus bar 31 and the negative electrode bus bar 32, which are one end of the first power wiring, to the high voltage positive terminal 51 and the high voltage negative terminal 52, and connects the second power wiring. A hexagonal bolt 70 is provided as a connection member for connecting the rear wheel positive bus bar 41 and the rear wheel negative harness 42 to the high voltage positive terminal 51 and the high voltage negative terminal 52, which are one ends of the rear wheel positive bus bar 41 and the high voltage negative terminal 52, respectively.

With this configuration, in the terminal block 5 , the hexagonal bolt 70 connects one end of the first power wiring of the front wheel control device 3 to the power terminal, and connects one end of the second power wiring of the rear wheel control device 4 to the power terminal. and power terminals, it is possible to use a battery module 2 suitable for a front-wheel drive vehicle and add power wiring to the rear wheel control device 4 without changing the structure of the battery module 2 .

In addition, the hexagonal bolt 70 is a front wheel wiring connection portion 71 that is a first connection portion that electrically connects the first power wiring to the power terminal, and a second connection portion that connects the second power wiring to the power terminal. and a rear wheel wiring connection portion 72 .

In this way, by connecting the hexagonal bolt 70, which is one connection member, to one power terminal, the front wheel wiring connection portion 71 and the rear wheel wiring connection portion 72 are configured, thereby providing a battery. Power wiring can be added to the rear wheel controller 4 using a battery module 2 suitable for front wheel drive vehicles without changing the structure of the module 2 .

The power terminals (high-voltage positive terminal 51 and high-voltage negative terminal 52) are formed as bolt-shaped members, and the front wheel wiring connection section 71, which is the first connection section, is formed as a nut-shaped member screwed to the power terminals. The rear wheel wiring connection portion 72, which is the second connection portion, is formed as a bolt-shaped member extending axially from the tip of the first connection portion, and the first power wiring is formed between the power terminal and the first power wire. 1 connecting portion, and the second power wiring is interposed between the second connecting portion and a nut member screwed to the second connecting portion.

With such a configuration, the front wheel wiring connection portion 71, which is a nut-shaped member, fixes the positive electrode bus bar 31 and the negative electrode bus bar 32, and the rear wheel wiring connection portion 72, which is a bolt-shaped member, fixes the rear wheel positive bus bar 41 and the rear wheel positive bus bar. The wheel negative electrode harness 42 is fixed. As a result, it is possible to connect the power wiring for the front wheels and the power wiring for the rear wheels to one power terminal, respectively. Power wiring can be added to the control device 4 for use.

Further, the front wheel wire connection portion 71, which is the first connection portion, is fixed to the power terminal with a tightening torque larger than that of the rear wheel wire connection portion 72, which is the second connection portion.

With this configuration, the tightening torque on the lower side of the hexagon bolt 70, which is a connecting member, is set to be greater than the tightening torque on the upper side, so when the upper nut is removed, the lower side is screwed first. It is prevented from coming off, and workability is improved.

The second power wiring includes a rear wheel positive bus bar 41 and a fuse 66. The rear wheel positive bus bar connects one end of the hexagon bolt 70 to the fuse 66, and the other end of the fuse 66 connects to the rear wheel positive bus bar. It is connected to the rear wheel control device 4 by a positive electrode harness 43 .

With such a configuration, a safety device can be added to the power wiring of the rear wheel controller 4 without changing the structure of the battery module 2 .

Rear wheel positive bus bar 41 has a crank shape between hexagon bolt 70 and fuse 66 .

With such a configuration, it is possible to buffer displacement and twisting of the positional relationship due to vibration between the terminal block 5 fixed to the battery module 2 and the fuse box 6 fixed to the resin part of the console box. Damage to the terminal block 5, the fuse box 6, and the rear wheel positive bus bar 41 can be prevented.

The battery module 2 is mounted on the electric vehicle 1, and the terminal block 5 exists in a safety area where other components outside the terminal block 5 do not enter even when the electric vehicle 1 crashes.

By configuring in this manner, the terminal block 5 having the only input/output terminal for electric power of the battery module 2 is prevented from being damaged, and safety can be ensured.

In addition, the terminal block 5 is provided with a terminal block cover 8 that covers the upper part of the terminal block 5, and the terminal block cover 8 is formed in a bulging shape along the shape of the safety area.

With this configuration, the terminal block cover 8 that covers the terminal block 5 can exist within the safety area, and the terminal block cover 8 interferes with other components of the electric vehicle 1 such as a console box. never

Moreover, the battery module 2 includes a battery body 2a and a case 2b that houses the battery body 2a, and the terminal block 5 is arranged outside the case 2b.

With this configuration, the battery module 2 suitable for a front-wheel drive vehicle is used, and power wiring is added to the rear wheel control device 4 without changing the structure of the battery body 2a of the battery module 2 and its wiring. can do.

It should be noted that the terminal connection structure using the hexagonal bolt 70 in the terminal block 5 of the present embodiment can take other forms as described later.

11A to 11C show cross-sectional views of the terminal block 5 in modifications of the present embodiment, and correspond to FIG.

In the modification shown in FIG. 11A, the structures of the high-voltage positive electrode terminal 151 and the hexagonal bolt 170 are different from those of the above embodiment.

The high-voltage positive electrode terminal 151 is configured as a nut-shaped member having a female screw formed in the housing 11 of the terminal block 5 , and this nut-shaped portion is exposed above the terminal block 5 to the outside of the battery module 2 . protruding toward.

The hexagon bolt 170 has a fixing portion 171 (first connection portion), which is a bolt-shaped member having a male thread for fixing the high-voltage positive electrode terminal 151 on its lower side. A fixing hole 172 (second connection portion), which is a nut-like member formed into a female thread, is formed in the upper end portion of the hexagon bolt 170 .

The positive bus bar 31 is connected to the high voltage positive terminal 151 by a hexagonal bolt 170 . The rear wheel positive bus bar 41 is connected to a fixing hole 172 of a hexagonal bolt 170 by a bolt 173 .

In the modification shown in FIG. 11B, the structure in which the high-voltage bus bar 270 is fixed to the high-voltage positive electrode terminal 51 is different from the above-described embodiment.

The high-voltage positive electrode terminal 51 is configured as a bolt-shaped member having a male screw formed in the housing 11 of the terminal block 5 as in the above-described embodiment. and projecting upward from the exposed terminal block 5 .

The high-voltage bus bar 270 includes a fixing portion 271 which is a nut-shaped member having a female screw for fixing the high-voltage positive electrode terminal 51 on its lower side. Fixed portions 272 and 273, which are bolt-like members formed in the shape of male threads, are formed on both end front sides of the high-pressure bus bar 270. As shown in FIG.

The positive bus bar 31 is connected to the fixed portion 272 (first connecting portion) by a nut. The rear wheel positive bus bar 41 is connected to the fixing portion 273 (second connecting portion) by a nut.

In the modification shown in FIG. 11C, the battery main body of the battery module 2 is electrically connected directly to the bus bar 370 by welding or the like. A harness 131, which is a power wiring for the front wheel control device 3, is electrically connected directly to the bus bar 370 by welding or the like (first connection portion). A harness 141, which is a power wiring for the rear wheel controller 4, is electrically connected directly to the bus bar 370 by welding or the like (second connection portion).

According to these modified examples, the rear wheel control device 4 can be electrically connected in addition to the front wheel control device 3 without making any major changes to the internal structure of the battery module 2 in the terminal block 5. .

1 electric vehicle 2 battery module (battery)
3 Front wheel control device (first power control device)
4 Rear wheel control device (second power control device)
5 terminal block 6 fuse box 8 terminal block cover 31 positive electrode bus bar (first power wiring)
32 negative bus bar (first power wiring)
41 rear wheel positive bus bar (second power wiring)
42 Rear wheel negative harness (second power wiring)
51 High voltage positive terminal (power terminal)
52 Negative terminal for high voltage (power terminal)
66 Fuse 70 Hex bolt (connecting member)
71 Wiring connection for front wheel (first connection)
72 rear wheel wiring connection (second connection)

Claims (8)

A terminal connection structure provided outside a battery,
a power terminal projecting from the outside of the battery for inputting and outputting power of the battery;
a terminal block to which a first power wiring electrically connected to the power terminal and the first power control device and a second power wiring electrically connected to the power terminal and the second power control device are respectively connected; , and
The terminal block includes a connection member, which is a conductive member and connects one end of the first power wiring and the power terminal, and connects one end of the second power wiring and the power terminal ,
The connecting member is a shaft-shaped member extending in the projecting direction of the power terminal, and has a first connecting portion at its lower portion for electrically connecting the first power wiring to the power terminal. comprising a second connection portion that connects the second power wiring to the power terminal;
Battery terminal connection structure. The battery terminal connection structure according to claim 1,
the power terminal is formed as a bolt-shaped member,
The first connecting portion is formed as a nut-shaped member that is screwed to the power terminal,
The second connecting portion is formed as a bolt-shaped member extending axially from the tip of the first connecting portion,
The first power wiring is interposed between the power terminal and the first connection portion,
A said 2nd electric power wiring is interposed between a said 2nd connection part and the nut member screwed to the said 2nd connection part.
Battery terminal connection structure. The battery terminal connection structure according to claim 2,
The first connection portion is fixed to the power terminal with a tightening torque greater than that of the second connection portion.
Battery terminal connection structure. The battery terminal connection structure according to any one of claims 1 to 3 ,
the second power wiring includes a busbar and a fuse;
The bus bar connects the connection member and one end of the fuse,
the other end of the fuse is connected to the second power control device
Battery terminal connection structure. The battery terminal connection structure according to claim 4 ,
The busbar has a crank shape between the connecting member and the fuse.
Battery terminal connection structure. The battery terminal connection structure according to any one of claims 1 to 5 ,
The battery is mounted on a vehicle,
The terminal block exists in a safety area where other parts do not enter when the vehicle collides.
Battery terminal connection structure. The battery terminal connection structure according to claim 6 ,
The terminal block has a cover that covers the upper part of the terminal block,
The cover is formed in a bulging shape along the shape of the safety area.
Battery terminal connection structure. The battery terminal connection structure according to any one of claims 1 to 7 ,
The battery includes a battery body and a case that houses the battery body,
The terminal block is arranged outside the case
Battery terminal connection structure.

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