JPH11164485A - Battery control apparatus for electric vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide with a simple structure a battery control apparatus for electric vehicle at the time of inspection, which offers superior safety. SOLUTION: A circuit substrate 3 is fixed on one side of a housing part 21 and a covering part 22. At a sidewall part on the other side of the housing part 21 and the covering part 22, a connector exposure window 210 is open, and a connector 4 or 6 is inserted. The connector 4 or 6 is connected to the circuit substrate 3 through a conductive member. The connector 4 or 6 connected to the circuit substrate 3, fixed to the housing part 21 through the conductive member, is inserted into the covering part 22, so that the removal of the covering part from the housing part will be hindered by the connector. Since the connector 4 or 6 connected to the circuit substrate 3 fixed to the covering part 22 through the conductive member is inserted into the covering part 21, the removal of the housing part 21 from the covering part 22 will be hindered by the connector 4 or 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a battery management device for an electric vehicle.

[0002]

2. Description of the Related Art A main battery for storing electric power for traveling of an electric vehicle tends to have a higher voltage due to reduction of power loss due to wiring resistance and switching element resistance and downsizing of wiring and circuit elements. In this case, it has reached about 300V.

[0003]

However, when the main battery voltage becomes such a high voltage, the battery management device of the electric vehicle which monitors the main battery or controls the charge and discharge of the main battery,
It is necessary to directly monitor the voltage (module voltage) of many parts of the main battery, and since many high-voltage wires are connected and routed, there is a possibility that an electric shock accident may occur at the time of inspection or the like. was there.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a battery management device for an electric vehicle having a simple configuration and excellent safety during inspection. I have.

[0005]

According to the first aspect of the present invention, there is provided a battery management apparatus for an electric vehicle, wherein a high voltage circuit for monitoring a high voltage main battery or controlling charging and discharging is mounted. The substrate is accommodated in a box-shaped case. The case comprises a box with an opening and a lid closing the opening, the circuit board is fixed to one of the box and the lid, and a connector exposure window is opened on the other side wall of the box and the lid. You. The connector portion is fitted into the connector exposure window, and the connector portion is connected to the circuit board through a conductive member.

[0006] According to this structure, since the connector portion connected to the circuit board fixed to the box portion through the conductive member is fitted into the lid portion, if the lid portion is to be removed from the box portion, the connector portion will be attached. On the contrary, the connector part which is connected to the circuit board fixed to the lid part through the conductive member is fitted into the box part, so if the box part is to be removed from the lid part, the connector part becomes an obstacle. Consequently, unless the connector is separated, the case cannot be opened, and as a result, the circuit board to which the high voltage is supplied is not erroneously shocked.

According to a second aspect of the present invention, a circuit board on which a high voltage circuit for monitoring a high voltage main battery or controlling charging and discharging is mounted is a box-shaped case. To be housed. The case includes a box having an opening and a lid closing the opening. The circuit board is fixed to the box, and a connector exposure window is opened in a side wall of the box. The connector portion is fitted into the connector exposure window, and the connector portion is connected to the circuit board through a conductive member.

Further, in this configuration, of the circuit boards, the high-voltage board to which a high voltage is applied is arranged on the bottom side of the box, and the low-voltage board to which a low voltage is applied is arranged on the opening side of the box. . In this way, even if the lid is removed from the box and the circuit board inside the box is to be removed, the circuit board is connected to the external cable through the connector, unless the external cable is removed. It becomes difficult to take out from the box portion, and it is possible to avoid the danger of the worker touching the high-voltage board being supplied with power. Furthermore, at the stage immediately after the lid is removed from the box, the high-voltage board is covered with the low-voltage board, so that it is possible to avoid the danger of the worker touching the high-voltage board during power supply. .

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the following examples.

[0010]

Embodiment 1 An embodiment 1 of a battery management device for an electric vehicle according to the present invention will be described with reference to FIGS. FIG. 1 is a sectional view of the battery management device of the electric vehicle, and FIG.
FIG. 3 is a schematic plan view of the circuit board of FIG. This battery management device for an electric vehicle is a device that detects each module voltage, total voltage and current of a main battery 1 for powering a traveling motor and monitors the detected voltages. A circuit board, 4 is a high-voltage connector (connector portion in the present invention), 5 is an external cable, 6 is a cable-side connector connected to the tip of the external cable and connected to the high-voltage connector 4 (connector portion in the present invention). ) And 7 are auxiliary equipment batteries for auxiliary equipment power supply.

The case 2 has a box portion 21 having an opening on the lower side.
And a bottom plate (lid in the present invention) 22 for closing the opening of the box 21. The box portion 21 is a deep-drawn aluminum shallow box, and a connector exposure window 210 is provided on a side wall portion thereof. The circuit board 3 includes a high-voltage board 31 and a low-voltage board 3
2. It consists of a flexible board 33 connecting both boards,
It is fixed to the bottom plate portion 22 by a bar 34. The high-voltage board 31 has a high-voltage system controller 31 for detecting terminal voltages and currents of the 20 battery modules constituting the main battery 1.
1. An input / output separated type for supplying power to the high-voltage system controller 311
DC-DC converter 312, photocoupler 3 for signal transmission
13 is mounted, and a microcomputer 321 for signal processing is mounted on the low-voltage board 32. The photocoupler 313 electrically insulates the microcomputer 321 from the high-voltage control unit 311 and transmits a signal.

The high-voltage connector 4 is fixed to a high-voltage board 31.
10, and the high-voltage connector 4 is connected to the connector 6,
Power is supplied from the main battery 1 through the external cable 5. Hereinafter, a case where the circuit board 3 is inspected will be described below. The bottom plate 22 is fitted to the open end of the box 21. Then, the connector 6 is pulled out from the high-voltage connector 4, and the box portion 21 is pulled up while holding the bottom plate portion 22.
At this time, the high-voltage connector 4 is
10, the high-voltage connector 4 is pulled out from the connector exposure window 210 by pushing the side wall of the box 21 outward with the opening end of the box 21.

Thus, the box 21 can be removed from the bottom plate 22. On the other hand, if the high-voltage connector 4
If the connector 6 is not removed from the bottom plate portion 22
Since the box 21 and the bottom plate 22 cannot be separated from each other while the circuit board 3 is supplied with high voltage from the main battery 3, safety against electric shock is ensured.

[0014]

Embodiment 2 Embodiment 2 of the battery management apparatus for an electric vehicle according to the present invention will be described with reference to the sectional view shown in FIG. However,
Components having the same main functions as those of the first embodiment are denoted by the same reference numerals. The device of this embodiment is characterized in that the structure of the case 2 is different from that of the first embodiment.

The case 2 of this embodiment includes a box 24 having openings on both sides, a lower plate (a lid in the present invention) 25 for closing the lower opening of the box 24, and an upper part of the box 24. And an upper plate portion 26 for closing the opening. The circuit board 3 has the same structure as that of the first embodiment, and is fixed inside a frame-shaped box portion 24 including only the side wall portion. The box portion 24 is provided with a connector exposure window 210 as in the first embodiment. Further, similarly to the first embodiment, the high-voltage connector 4 is fixed to the high-voltage board 31, the high-voltage board 31 is fitted into the connector exposure window 210, and the high-voltage connector 4 is connected to the main battery 1 through the connector 6 and the external cable 5. Powered by

In particular, in this embodiment, the lower plate portion 25 on the high voltage substrate 31 side has a locking plate portion 251 projecting along one outer surface of the box portion 24, and the locking plate portion 251 is Has a connector exposure window 252 in the same manner as in FIG. After passing through the connector exposure window 210 of the box 24, the high-voltage connector 4 is further fitted to the connector exposure window 252 of the locking plate 251.

A case where the circuit board 3 is inspected will be described below. First, to inspect the low-voltage board 32, the screw 8 is loosened to remove the upper plate 26 from the box 24. On the other hand, to inspect the high-voltage board 31, the screw 9 is loosened, the connector 6 is detached from the high-voltage connector 4, the lower plate portion 25 is slightly shifted laterally, the connector exposure window 252 is removed from the high-voltage connector 4, and finally the lower plate is removed. The part 25 may be removed from the box part 24. In this way, when the lower plate portion (lid portion in the present invention) 25 is removed from the box portion 24, the connector 6 must be removed from the high-voltage connector 4 without fail.
As in the first embodiment, excellent electric shock safety can be ensured.

[0018]

Third Embodiment A third embodiment of the battery management apparatus for an electric vehicle according to the present invention will be described with reference to the sectional view shown in FIG. However,
Components having the same main functions as those of the first embodiment are denoted by the same reference numerals. The device of this embodiment is characterized in that the circuit board 3 is fixed to the bottom of the box 21 in the device of the first embodiment.

Therefore, in this embodiment, the connector 6
Can be removed from the box 21 without removing the bottom plate 22 from the high-voltage connector 4. However, in this example,
Even if the bottom plate portion 22 is removed, the low-voltage board 3 of the two-story circuit board
Since only 2 is exposed, there is no fear of electric shock. In addition, to remove the circuit board 3 from the box portion 21 by further loosening the screw 10,
Otherwise, it is difficult to do so, and safety against electric shock can be ensured.

Hereinafter, a case where the circuit board 3 is inspected will be described. The bottom plate 22 is fitted to the open end of the box 21. Then, the connector 6 is pulled out from the high-voltage connector 4, the screw 11 is removed, and the bottom plate 22 and the box 21 are separated. To take out the circuit board 3 from the box portion 21, the screw 1
The high-voltage connector 4 may be removed from the connector exposure window 210 by loosening 0 and displacing the circuit board 3 a little sideways.

(Modification) FIG. 5 shows a modification of the third embodiment. In this modified embodiment, the connector 6 is fitted to the connector exposure window 210 of the box 21 instead of the high-voltage connector 4, and the effect is the same. However, in this modified embodiment, it is not necessary to remove the high-voltage connector 4 from the connector exposure window 210 when taking out the circuit board 3.
Work becomes easier.

In the first and second embodiments, the connector 6 can be fitted to the connector exposure window 210 of the box 21 or the connector exposure window 252 of the locking plate 251 instead of the high-voltage connector 4. Action and effect can be obtained.

[Brief description of the drawings]

FIG. 1 is a first embodiment of a battery management device for an electric vehicle according to the present invention.
FIG.

FIG. 2 is a schematic plan development view showing a circuit board 3 of the device of FIG.

FIG. 3 is a sectional view showing an apparatus according to a second embodiment.

FIG. 4 is a sectional view showing an apparatus according to a third embodiment.

FIG. 5 is a sectional view showing a modification of the third embodiment.

[Explanation of symbols]

1 is a main battery, 2 is a case, 3 is a circuit board, 4 is a high voltage connector, 21 is a box, 22 is a lid, 31 is a high voltage board,
32 is a low-voltage board, 210 is a connector exposure window of the box part 21.

Continued on the front page (51) Int.Cl. ⁶ Identification code FI H01M 10/44 H01M 10/44 Q

Claims (2)

[Claims] 1. A circuit board on which a high-voltage circuit for monitoring or controlling charging and discharging of a main battery for storing traveling power for generating a high voltage is mounted, a box having an opening, and a lid for closing the opening. A case in which the circuit board is fixed to one of the box portion and the lid portion and is housed therein; and a connector exposure window opened in the other side wall portion of the box portion and the lid portion. A battery management device for an electric vehicle, comprising: a high-voltage circuit power supply connector unit coupled to the circuit board through a conductive member. 2. A circuit board on which a high voltage circuit for monitoring or controlling charging and discharging of a main battery for storing traveling power for generating a high voltage is mounted, a box having an opening, and a lid for closing the opening. A case in which the circuit board is fixed to the box portion and accommodated therein, and is fitted into a connector exposure window opened in a side wall portion of the box portion and is coupled to the circuit board through a conductive member. A high-voltage circuit power supply connector section, wherein the circuit board has a high-voltage board disposed on the bottom side of the box section and a low-voltage board disposed on the opening side of the box section. Battery management device for electric vehicles.