JP2009202668A - Battery state detection sensor device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a battery state detection sensor device which can be fixed to a location at the battery where thermal influence is hardly attained in an engine room of a vehicle. <P>SOLUTION: The battery state detection sensor device 1 has a battery state detection sensor 5 for use in detecting a state of a battery 50 installed in an engine room of a vehicle, wherein the battery state detection sensor is placed in the midway part of a wire harness 10 with its one end connected to a connector terminal of the battery to detect the state of the battery, so that the battery state detection sensor can hardly be influenced by the heat of an engine within the engine room of the vehicle and the battery state detection can be carried out precisely for a long period of time. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a battery state detection sensor device particularly suitable for detecting the state of a battery in an engine room of a vehicle.

  In general, a battery sensor that is attached to a battery post provided on the upper surface of an in-vehicle battery and monitors the remaining capacity of the in-vehicle battery is known (for example, see Patent Document 1).

The battery sensor described in Patent Document 1 is a type that can be directly attached to a battery post of a battery (hereinafter referred to as “electrode” or “terminal” as appropriate), and one end of a wire harness is attached to this battery sensor. The other end is attached to an electric junction box or a vehicle body panel of the vehicle.
Japanese translation of PCT publication No. 2003-517613 (page 5-6, FIG. 1a, FIG. 3)

  In the engine room of the vehicle, the hot air heated by the engine convects and accumulates in the upper part of the engine room. The battery sensor is easy to receive.

  Many electronic components are built into the battery sensor. For example, when the vehicle is used in a cold region, the temperature difference in the engine room increases when the vehicle is used and when it is not used. Heat cycle, which adversely affects the electronic components in the sensor. Therefore, it is preferable that the battery sensor be attached to a site that is not easily affected by the environmental temperature or usage conditions.

  In addition, in the case where a correction temperature sensor used in connection with the battery state determination is built in the battery sensor, the type in which the battery sensor is attached to the battery terminal as in the above-described conventional example, the heat conduction is performed from the terminal. Thus, the temperature of the battery is indirectly measured, and the measured temperature may deviate from the accurate temperature inside the battery to be measured, which may hinder correction associated with the battery state detection.

  In addition, when attaching a battery sensor to the terminal on the upper surface of the battery, it is necessary to attach the battery sensor to the terminal via a specially shaped bracket in consideration of the orientation of the battery terminal and the mounting location of the battery in the engine room. Invite high.

  In addition, it is preferable that the wire harness whose one end is connected to the battery terminal is changed in a predetermined direction depending on the location of the battery or the position of the battery post in the battery. In the attached wire harness, the harness pull-out direction is limited to one direction.

  The objective of this invention is providing the battery state detection sensor apparatus which can attach a battery state detection sensor to the site | part of the battery which is not influenced by the heat in the engine room of a vehicle.

In order to solve the above-described problem, a battery state detection sensor device according to claim 1 of the present invention provides:
A battery state detection sensor device comprising a battery state detection sensor for detecting a state of a battery mounted in an engine room of a vehicle,
The battery state detection sensor is interposed in the middle of a wire harness whose one end is connected to the connection terminal of the battery.

  Since the battery state detection sensor device has such a configuration, it is not necessary to attach the battery state detection sensor to the electrode post on the upper surface of the battery or the engine room side of the battery side as in the conventional case. In other words, the battery state detection sensor can be disposed at an appropriate location on the side of the battery, and the electronic circuit inside the battery state detection sensor is affected by the heat that has risen around the engine and accumulated in the upper part of the engine room. It becomes difficult to receive.

A battery state detection sensor device according to claim 2 of the present invention is the battery state detection sensor device according to claim 1,
A temperature sensor for detecting the temperature of the battery is provided in the battery state detection sensor.

  If the battery status detection sensor is equipped with a temperature sensor, it is not possible to accurately measure the temperature of the battery itself under the influence of heat generated by the engine, especially when the battery status detection sensor is placed on the top surface of the battery. Although not possible, according to the structure of the present invention, such inconvenience can be eliminated.

A battery state detection sensor device according to claim 3 of the present invention is the battery state detection sensor device according to claim 1 or 2,
The battery state detection sensor itself is covered with a heat insulating member.

  By further covering the battery state detection sensor itself with a heat insulating member, it is possible to make it less susceptible to the influence of heat from the engine, and more accurate battery state detection can be performed.

A battery state detection sensor device according to a fourth aspect of the present invention is the battery state detection sensor device according to any one of the first to third aspects,
The battery state detection sensor can be attached to the battery in a state of being in contact with the battery via a bracket for fixing the battery to a vehicle.

  Since the battery state detection sensor can be attached in contact with the battery using a bracket for fixing the battery to the vehicle, the number of parts of the battery state detection sensor device can be reduced, which contributes to cost reduction.

  According to the battery state detection sensor device of the present invention, since the battery state detection sensor can be attached to a part of the battery that is not affected by the heat in the engine room of the vehicle, it is influenced by the heat of the engine in the engine room of the vehicle. Is less likely to be received by the battery state detection sensor, and the battery state detection can be accurately performed over a long period of time.

  Hereinafter, a battery state detection sensor device according to an embodiment of the present invention will be described with reference to the drawings. This battery state detection sensor device includes a battery state detection sensor and has a configuration in which a battery state detection sensor is interposed in the middle of a wire harness whose one end is connected to a connection terminal of the battery.

  FIG. 1 is a perspective view showing a state in which a battery state detection sensor device 1 according to an embodiment of the present invention is attached to a battery 50 in an engine room (not shown) of a vehicle. In the figure, a battery state detection sensor 5 of the battery state detection sensor device 1 is attached to a side surface 50a that is not easily affected by heat from an engine of a battery 50 mounted in an engine room of a vehicle. FIG. 2 is a front view of the battery state detection sensor device 1 shown in FIG. FIG. 3 is a plan view of the battery state detection sensor device 1 shown in FIG. 2 and 3 are partially transparent for clarity of illustration of each component.

  The battery state detection sensor device 1 according to the present embodiment includes a battery state detection sensor 5 that detects a charged state or a deteriorated state of a battery 50 mounted in an engine room of a vehicle, and is connected to a negative terminal 51 of the battery 50 at one end. The state of the battery 50 is detected by interposing the battery state detection sensor 1 in the middle of the wire harness 10 to which is connected.

  In the present embodiment, the battery state detection sensor device 1 includes the side surface 50a of the battery 50 on the side where the battery state detection sensor 5 is not easily affected by heat from the engine via the bracket 20 that fixes the battery 50 to the vehicle. It is installed in contact with

  Further, the first wire harness 11 having one end connected to the battery state detection sensor 5 has the other end connected to the negative terminal 51 of the battery. The first wire harness 11 has such a length that the battery state detection sensor 5 can be attached to an appropriate position on the side surface 50 a of the battery 50.

  On the other hand, the second wire harness 12 having one end connected to the battery state detection sensor 5 is grounded at the other end of the vehicle body panel itself or a ground line of the electrical junction box (not shown).

  The bracket 20 is for firmly fixing the battery 50 to the vehicle body panel of the vehicle. The bracket 20 is L-shaped in an end view to prevent the battery 50 from being displaced by contacting the upper plate 21 having a certain thickness and the edge of the upper part of the battery. Two mounting rods whose upper end is connected to each end of the upper edge plate 22 of the mold and the upper plate 21 with bolts or the like not shown, and whose lower end is hooked to the vehicle body panel of the vehicle, for example. 23.

  One of the two mounting rods 23 (the front side in FIG. 1) sandwiches the battery state detection sensor 5. The battery state detection sensor 5 is firmly attached by a screw or the like (not shown) and a plate-like fastener 24 so as not to be displaced between the attachment rod 23 and the battery side surface.

  Unlike a normal current sensor that detects only the current value of the battery 50, the battery state detection sensor 5 measures the current flowing through the battery 50 and the values of the voltage, temperature, and impedance (internal resistance) of the battery 50, and uses a unique algorithm. This is a high-performance sensor that detects the state of the battery (charge rate, degree of deterioration, discharge capacity, etc.) by performing the above calculation.

  As shown in FIGS. 2 and 3, the battery state detection sensor 5 is a printed circuit board on which a shunt resistor 110 and a shunt resistor 110 including a resistor 111 and bus bars 112 and 113, a microcomputer and a current sensing circuit (not shown) are mounted. 120, and bus bars 112 and 113, and connection portions 130 (131 and 132) for connecting the printed circuit board 120. The printed circuit board 120 communicates battery power and measurement information to an in-vehicle electronic unit (not shown). The signal line connector 121 is provided. A temperature sensor 122 is mounted on the printed circuit board 120.

  Further, these electronic components and electrical components are covered with a resinous case 140. The temperature sensor 122 is disposed at the center of the case 140 and attached so as to contact the case 140.

  The temperature sensor 122 plays an important role in performing a correction calculation by measuring the temperature of the battery itself when detecting the state of charge of the battery 50 or the state of health of the battery 50.

  The shunt resistor 110 is insert-molded in a case 140 made of resin and accommodated in the case. The printed circuit board 120 is fixed to the case 140 with a fastener such as a screw on the side of the shunt resistor 110 so as not to overlap the shunt resistor 110, and is electrically connected to the shunt resistor 110 through the connection portion 130. ing.

  The connecting portion 130 is formed of a thin lead wire, and one end of each is preliminarily welded to the shunt resistor 110. After fixing the printed circuit board 120 to the case 140, the other end is soldered to the printed circuit board 120. Connected. In addition, instead of using a lead wire for the connection part 130, you may use wire bonding and a flexible printed wiring board. Furthermore, the connection method of the connection part 130 and the printed circuit board 120 may be not only soldering but also connection by welding or a conductive adhesive.

  A part of the printed circuit board 120, the connector 121, the resistor 111, and the bus bars 112 and 113 are surrounded by a resin mold 141 made of a highly waterproof resin and are accommodated in the case 140.

  Further, one bus bar 112 is fixed to the other end 11b of the harness 11 provided with the battery terminal 11a at one end via a bolt 161 and a nut 162. In addition, the other bus bar 113 is fixed to the one end 12b of the harness 12 provided with the body earth attaching terminal 12a at the other end via the bolt 171 and the nut 172, and the harness 11 and the body earth attaching terminal. Yes. In addition, although the fixing method with a volt | bolt is described in the present Example, the connection by welding etc. may be sufficient.

  Further, the case 140 is covered with a cover 150. The cover 150 is made of a heat insulating member such as a resin material having excellent heat insulating properties, and also has a simple waterproof property.

  Since the battery state detection sensor device 1 according to the present embodiment has such a configuration, it is not necessary to attach the battery state detection sensor to the electrode post on the upper surface of the battery as in the related art. That is, the battery state detection sensor 5 can be arranged at an appropriate location on the side of the battery, and the electronic circuit inside the battery state detection sensor is influenced by the heat that has been heated around the engine and accumulated in the upper part of the engine room. It becomes difficult to receive.

  In particular, in the battery state detection sensor 5 according to the present embodiment, a temperature sensor 122 is provided therein, but unlike a conventional battery sensor that needs to be attached to a post on the upper surface of the battery, Since the battery state detection sensor 5 can be attached to the battery side surface 50a that is hardly affected by the heat from the engine, the inconvenience seen in such a conventional battery sensor can be eliminated.

  Further, since the battery state detection sensor 5 according to the present embodiment is further covered with a cover 150 made of a heat insulating member, the battery state detection sensor 5 is further less affected by the heat generated from the engine, and more accurate battery state. Detection can be performed.

  In addition, since the battery state detection sensor 5 according to the present embodiment is attached to the battery 50 via the bracket 20 that fixes the battery 50 to the vehicle, the battery state detection sensor 5 is attached to the battery 50 of the battery state detection sensor device 1. The number of parts can be reduced, contributing to cost reduction.

  Next, a description will be given of different attachment modes of the battery state detection sensor device 1 to the battery 50. In addition, about the structure equivalent to the above-mentioned embodiment, a corresponding code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  4 is a perspective view showing a state in which the battery state detection sensor device 1 according to one embodiment of the present invention is attached to a position different from the bracket attachment position of the battery in FIG. 1.

  In another manner of mounting the battery state detection sensor device 1 to the battery 50, the battery state detection sensor 5 is fixed to the side surface end 22a of the upper edge plate 22 of the battery mounting bracket 20, and is affected by heat from the engine. It is in contact with the battery side surface 50a that is difficult to receive. The battery terminal 11 a that is one end of the first wire harness 11 is connected to the negative terminal 51 of the battery 50. Thus, even if it attaches to the upper edge plate 22 of the battery attachment bracket 20, the effect | action of this invention can be exhibited.

  FIG. 5 is a perspective view showing a state in which the battery state detection sensor device 1 according to one embodiment of the present invention is attached to a position different from the bracket attachment position of FIGS. 1 and 4.

  The battery state detection sensor 5 is fixed to the upper surface end 22 b of the upper edge plate 22 of the bracket 20. Further, the battery terminal 11 a that is one end of the first wire harness 11 is connected to the negative terminal 51 of the battery 50.

  In this case, the battery state detection sensor 5 is attached to the upper surface of the battery 50. However, if the battery state detection sensor is covered with a heat insulating member, the upper surface of the battery 50 is not affected by the heat of the upper part of the engine room. And when the wiring direction and the wiring space of the wire harness 10 are restrict | limited, it can be said that the aspect of such attachment is also meaningful at the point which improves the wiring workability | operativity of the wire harness 10 in an engine room.

  That is, according to the battery state detection sensor device 1 according to the present embodiment, since the sensor itself can be attached to various places of the battery as long as it is a part that is not easily affected by heat from the engine room of the battery 50, the wire harness The degree of freedom of routing from the ten batteries 50 can be increased.

  As described above, the battery state detection sensor device according to the present invention does not require the battery state detection sensor to be attached to the electrode post on the upper surface of the battery as in the prior art. In other words, the battery state detection sensor can be arranged at an appropriate location on the side of the battery, and the electronic circuit inside the battery state detection sensor is affected by the heat that has risen around the engine and accumulated in the upper part of the engine room. It becomes difficult to receive.

  In addition, if a temperature sensor is provided inside the battery state detection sensor, the temperature of the battery itself is affected by the heat generated by the engine, particularly when the battery state detection sensor is disposed on the battery upper surface or the engine side of the battery side. However, according to the structure of the present invention, such inconvenience can be eliminated.

  Moreover, by further covering the battery state detection sensor itself with a heat insulating member, it is possible to make it less susceptible to the influence of heat from the engine, and to detect the battery state more accurately.

  Further, if the battery state detection sensor is attached in contact with the battery via a bracket for fixing the battery to the vehicle, the number of parts of the battery state detection sensor can be reduced, which can contribute to cost reduction.

It is a perspective view which shows the state which attached the battery state detection sensor apparatus which concerns on one Embodiment of this invention to the side surface which is hard to receive the influence of the heat from an engine of the battery mounted in the engine room of the vehicle. It is a front view of the battery state detection sensor apparatus shown in FIG. It is a top view of the battery state detection sensor apparatus shown in FIG. It is a perspective view which shows another attachment form different from FIG. 1 to the battery of the battery state detection sensor apparatus which concerns on one Embodiment of this invention. It is a perspective view which shows another attachment form different from FIG.1 and FIG.4 to the battery of the battery state detection sensor apparatus which concerns on one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Battery state detection sensor apparatus 5 Battery state detection sensor 10 Wire harness 11 1st wire harness 11a Battery terminal 11b Other end part 12 Second wire harness 12a Body earth attachment terminal 12b One end part 20 (Battery attachment ) Bracket 21 Upper plate 22 Upper edge plate 22a Side end 22b Top end 23 Mounting rod 24 Fastener 50 Battery 50a Battery side 51 Negative terminal 110 Shunt resistor 111 Resistor 112, 113 Bus bar 120 Printed circuit board 121 Signal line connection Connector 122 temperature sensor 130 (131, 132) connecting part 140 case 141 resin mold 150 cover 161 bolt 162 nut 171 bolt 172 nut

Claims (4)

A battery state detection sensor device comprising a battery state detection sensor for detecting a state of a battery mounted in an engine room of a vehicle,
The battery state detection sensor device characterized by interposing the battery state detection sensor in the middle of a wire harness whose one end is connected to the connection terminal of the battery.   The battery state detection sensor device according to claim 1, wherein a temperature sensor for detecting the temperature of the battery is provided in the battery state detection sensor.   The battery state detection sensor device according to claim 1 or 2, wherein the battery state detection sensor itself is covered with a heat insulating member. 4. The battery state detection sensor can be attached to the battery in a state of being in contact with the battery via a bracket that fixes the battery to a vehicle. The battery state detection sensor device according to the description.

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