JP6011460B2 - Electronic equipment - Google Patents

Description

  The present invention relates to an electronic device comprising a housing and a circuit board housed in the housing and having a low voltage portion and a high voltage portion.

  Conventionally, as seen in Patent Document 1 below, a first battery chamber that houses a plurality of unit cells, a second battery chamber that houses a plurality of unit cells, a control chamber that houses a control unit, There is known a battery module including an outer case that houses a first battery chamber and a second battery chamber. Specifically, in this battery module, the control chamber and the first and second battery chambers are separated by a partition or a partition wall. Thereby, in the exterior case, intrusion of foreign matter from the first and second battery chambers to the control chamber can be prevented, and a safety circuit can be improved by avoiding a short circuit in a circuit in the control chamber. .

JP 2003-243049 A

  By the way, the present inventor has a housing, a circuit board housed in the housing and having a low-voltage part and a high-voltage part, and attached to the low-voltage part of the circuit board through an opening formed in the housing. The safety of an electronic device provided with a connector formed so as to protrude outside the body was examined. Specifically, studies were made to make this electronic device conform to the safety regulations. This regulation stipulates that an object (for example, an elongated object) inserted from the outside of the housing directly contacts the high voltage portion through a gap formed between the edge of the housing opening and the connector. It is a regulation (for example, IEC60204) to prevent.

  As measures for adapting the electronic device to such laws and regulations, for example, a structure that covers the electronic device with a protective cover that can be removed with a tool or seals a gap formed between the edge of the opening and the connector is provided. Measures such as adopting electronic devices can be considered.

  However, there are cases where such measures cannot be adopted. Specifically, there are cases in which measures to cover with the protective cover cannot be adopted in order to avoid restrictions on the mounting target of the electronic device or the addition of parts including the protective cover and the assembly process of the protective cover. . The reason for avoiding the addition of the parts including the protective cover and the process of assembling the protective cover is to avoid an increase in the cost of the electronic device.

  In addition, in order to avoid an increase in the cost of the electronic device, there are cases in which a measure for making the electronic device a sealed structure cannot be adopted. In addition, the cost increases due to the sealed structure, because a special process must be applied to the outer surface of the housing in order to achieve the sealed structure. This is because manufacturing technology is required.

  The present invention has been made to solve the above-described problems, and the object thereof is restricted by the spatial restrictions of the mounting target when taking measures to prevent contact with the high voltage portion in the housing. It is another object of the present invention to provide an electronic device that can avoid an increase in cost of the electronic device.

In order to solve the above problems, the present invention provides a housing (14), a circuit board (12) housed in the housing and having a low voltage part (40L) and a high voltage part (40H), and the circuit board. A connector (22) that is attached to the low-voltage portion and is formed so as to protrude from the opening (18b) formed in the housing to the outside of the housing; and a portion of the connector in the housing (22a) or a cutoff part (30) formed of an insulator so as to cut off between the opening and the high voltage part in the casing, provided on either the circuit board. Features.

  In the said invention, the interruption | blocking part is provided. For this reason, even if an object is inserted from the outside of the housing toward the high voltage part through the gap between the edge of the opening and the connector, the blocking part prevents the object from reaching the high voltage part. be able to. Thereby, it can prevent that an object contacts the high voltage part inside a housing | casing from the housing | casing outside.

  Moreover, in the said invention, the interruption | blocking part exists in a housing | casing. For this reason, even when there is a spatial restriction on the mounting target of the electronic device, it is possible to prevent an object outside the housing from coming into contact with the high voltage portion.

  Furthermore, in the said invention, the structure by which the interruption | blocking part is provided in either the part in the housing | casing of a connector or a circuit board is employ | adopted. For this reason, in order to make an electronic device into a sealed structure, the process of the outer surface of a housing | casing becomes unnecessary, for example. For this reason, it is possible to avoid an increase in the cost of the electronic device in order to take measures to prevent an object outside the housing from coming into contact with the high voltage portion.

The perspective view which shows the whole structure of a battery monitoring apparatus. The disassembled perspective view which decomposes | disassembles and shows the main structures of a battery monitoring apparatus. The top view of a circuit board. The perspective view which shows the interruption | blocking member. FIG. 1 is a sectional view taken along line 1-1 of FIG. FIG. 1 is a sectional view taken along line 1-1 of FIG. Sectional drawing of the battery monitoring apparatus concerning related technology. Sectional drawing of the battery monitoring apparatus concerning related technology. The figure which shows the attachment method of the connector cover concerning other embodiment. The figure which shows the attachment method of the connector cover concerning other embodiment.

  Hereinafter, an embodiment in which an electronic device according to the present invention is embodied as a battery monitoring device for monitoring an assembled battery including a series connection body of a plurality of battery cells will be described with reference to the drawings. Here, in the present embodiment, the assembled battery serves as a power supply source of a motor generator as an in-vehicle main machine.

  First, the overall configuration of the battery monitoring device will be described with reference to FIGS. 1 and 2.

  The battery monitoring apparatus 10 includes a circuit board 12 (for example, a printed board) and a housing case 14 that houses the circuit board 12 as main components.

  The outer shape of the storage case 14 has a flat rectangular parallelepiped shape. The housing case 14 is a vertically separated case including a first case member (hereinafter referred to as a lower cover 16) and a second case member (hereinafter referred to as an upper cover 18) attached to the lower cover 16. .

  The lower cover 16 is formed (more specifically, press-molded) from a metal material such as aluminum. In the present embodiment, the lower cover 16 is formed as a rectangular plate member. A lower fixing portion 16 a that is assembled and fixed to the upper cover 18 is provided on the peripheral portion of the lower cover 16. The lower fixing portion 16 a is provided at each position near the four corners in the surface of the lower cover 16. In the present embodiment, a screw insertion hole is assumed as each lower fixing portion 16a.

  Similar to the lower cover 16, the upper cover 18 is formed of a metal material such as aluminum (more specifically, press-molded). In the present embodiment, the upper cover 18 has a flat rectangular parallelepiped shape, and has substantially the same size as the lower cover 16 in plan view. An upper fixing portion 18 a that is assembled and fixed to the lower cover 16 is provided at the peripheral portion of the upper cover 18. The upper fixing portion 18 a is provided at each position near the four corners in the surface of the upper cover 18. In the present embodiment, a screw insertion hole is assumed as each upper fixing portion 18a. The upper cover 18 is fixed by inserting a fixing screw N into the fixing portions 16a and 18a in a state where one surface thereof is in contact with one surface of the lower fixing portion 16a. As a result, the circuit board 12 is housed and fixed in the housing case 14 including the lower cover 16 and the upper cover 18. In addition, the shape of the storage case 14 is not limited to what was illustrated in FIG.1 and FIG.2.

  The circuit board 12 has a rectangular plate shape, and is electrically connected to a high voltage connector 20 electrically connected to an assembled battery outside the battery monitoring device 10 and a host ECU that controls vehicle control. A first low-voltage connector 22 and a second low-voltage connector 24 to which temperature information of battery cells constituting the assembled battery is input. These connectors 20 to 24 are provided in a state of being exposed on one side outside the battery monitoring device 10.

  Specifically, the high-voltage connector 20 is provided at any one of the four corners of the plate surface of the circuit board 12. The high voltage connector 20 is provided in a state of being exposed on the side surface of the housing case 14.

  The second low-voltage connector 24 is provided at a position on a diagonal line of the plate surface of the circuit board 12 with respect to the position where the high-voltage connector 20 is provided, among the four corners of the plate surface of the circuit board 12. The second low-voltage connector 24 is provided on the side surface of the housing case 14 so as to be exposed on the side opposite to the side where the first low-voltage connector 22 is exposed.

  The first low-voltage connector 22 is formed so as to protrude in the normal direction of the plate surface of the circuit board 12. In a state where the circuit board 12 is housed in the housing case 14, the first low-voltage connector 22 protrudes from the opening 18 b formed in the upper cover 18 to the outside of the housing case 14. One end of a wire harness is connected to the first low-voltage connector 22, and a host ECU or the like is connected to the other end of the wire harness.

  A connector cover 30 as a “blocking member” is attached to the first low-voltage connector 22. Even if an elongated object is inserted into the connector cover 30 from the outside to the inside of the housing case 14 through the gap between the edge of the opening 18b and the first low-voltage connector 22, the object remains on the circuit board 12. It is a member for preventing reaching the high voltage part. The connector cover 30 will be described in detail later.

  Next, the configuration of each part of the battery monitoring device 10 will be described in detail.

  First, the circuit board 12 will be described with reference to FIG. Here, FIG. 3 is a plan view of the circuit board 12.

  As illustrated, the circuit board 12 includes a low voltage portion 40L and a high voltage portion 40H. In FIG. 3, the low voltage portion 40L and the high voltage portion 40H are indicated by hatching.

  The low voltage unit 40L is a region in which the housing case 14 is grounded (hereinafter referred to as a low voltage GND). On the other hand, the high voltage portion 40H is a region having a ground potential higher than the ground potential of the low voltage portion 40L. In the present embodiment, the ground potential of the high voltage unit 40H is set to the median value of the potential of the positive terminal and the negative terminal of the assembled battery. This is because the positive electrode terminal and the negative electrode terminal of the assembled battery are connected by a series connection body of a pair of resistors (more specifically, a pair of resistors having the same resistance value), and the connection point of these resistors is connected to the low voltage section. This can be realized by connecting to a 40 L ground (specifically, a low voltage GND).

  In the circuit board 12, the low voltage part 40L and the high voltage part 40H are electrically insulated by the insulating part 40I.

  The first low-voltage connector 22 is provided at one of the four corners of the circuit board 12 in a front view of the plate surface of the circuit board 12. More specifically, the first low-voltage connector 22 is provided at a position opposite to the position where the second low-voltage connector 24 is provided in the four corners of the plate surface of the circuit board 12.

  A monitoring circuit 42 for monitoring the state of the battery cell is mounted on the high voltage unit 40H. Specifically, the monitoring circuit 42 has a function of detecting a voltage between terminals of the battery cell and monitoring whether the battery cell is in an overcharge state or an overdischarge state based on the detected terminal voltage. In the present embodiment, the monitoring circuit 42 is configured as an integrated circuit.

  The monitoring result of the monitoring circuit 42 is transmitted to the low voltage side circuit 46 mounted on the low voltage unit 40L via the insulating element 44. The insulating element 44 is an element (for example, a photocoupler) for transmitting information between the voltage units 40H and 40L while electrically insulating the high voltage unit 40H and the low voltage unit 40L.

  The low voltage side circuit 46 is an integrated circuit to which the monitoring result of the monitoring circuit 42, the temperature information of the battery cell transmitted through the second low voltage connector 24, and the like are input. The low voltage side circuit 46 transmits the monitoring result, temperature information, and the like to the host ECU via the first low voltage connector 22.

  In the drawing, only one monitoring circuit 42 and insulating element 44 are shown as electronic components mounted on the circuit board 12, but actually, a plurality of these electronic components are mounted and other electronic components are also mounted. Parts are also mounted.

  Next, the connector cover 30 which is a characteristic configuration according to the present embodiment will be described with reference to FIGS. Here, FIG. 4 is a perspective view showing the connector cover 30, and FIG. 5 is a cross-sectional view taken along line 1-1 of FIG. In FIG. 5, a cross-sectional view taken along line 1-1 of FIG. 1 is partially simplified.

  As shown in the figure, the connector cover 30 is a member in which a support portion 30a, a first wall portion 30b, a second wall portion 30c, and a claw portion 30d are integrally molded without a seam. More specifically, these members 30a to 30d are integrally formed of an insulating resin. That is, the connector cover 30 is formed of an insulator.

  The support portion 30 a is formed in a cylindrical shape so as to extend in the protruding direction of the first low-voltage connector 22 and so as to surround the first low-voltage connector 22. In other words, the support portion 30 a is formed to extend in the normal direction of the plate surface of the circuit board 12 in a state where the connector cover 30 is attached to the first low-voltage connector 22.

  The first wall portion 30b is a planar direction orthogonal to the direction in which the support portion 30a extends, and is directed in a direction facing the high voltage portion 40H from the first low-voltage connector 22 in a front view of the plate surface of the circuit board 12. The two ends of the support portion 30a are formed so as to extend from the opposite side of the circuit board 12 side. In other words, the first wall portion 30b has the connector cover 30 attached to the first low-voltage connector 22 and extends in a direction parallel to the plate surface of the circuit board 12 out of both ends of the support portion 30a. It is formed to extend from the upper cover 18 side.

  The second wall portion 30c is formed to extend from the outer edge of the first wall portion 30b from the outer edge in the direction facing the high voltage portion 40H from the first low-voltage connector 22 in a front view of the plate surface of the circuit board 12. Has been. The second wall 30c is formed so as to extend from the outer edge of the first wall 30b in the direction in which the support 30a extends from the circuit board 12 side to the opening 18b. Specifically, the second wall 30c is formed so as to form approximately 90 degrees with respect to the first wall 30b. In other words, the second wall 30c extends toward the opening 18b in the normal direction of the plate surface of the circuit board 12 with the connector cover 30 attached to the first low-voltage connector 22. Is formed.

  The connector cover 30 includes the claw portion 30d as described above. On the other hand, the first low-voltage connector 22 includes a notch-shaped engagement portion 22a formed on the outer surface thereof. The engaging part 22 a is a part in the housing case 14 of the first low-voltage connector 22.

  When the connector cover 30 is inserted into the first low-voltage connector 22 from the support portion 30a side, the claw portion 30d of the connector cover 30 is hooked on the engaging portion 22a of the first low-voltage connector 22 with elastic deformation. Engage. Thereby, the connector cover 30 is attached and fixed to the first low-voltage connector 22. That is, the fixing structure of the connector cover 30 and the first low-voltage connector 22 is a so-called snap-fit fixing structure.

  Then, the effect by providing the connector cover 30 is demonstrated using FIG. Here, FIG. 6 shows the proximity test probe 50 from the outside of the housing case 14 to the inside of the battery monitoring device 10 through the gap between the edge of the opening 18b and the first low-voltage connector 22 in FIG. It is the inserted figure. In the present embodiment, the probe 50 is assumed to have a diameter of 1 mm.

  As shown in the figure, by providing the connector cover 30, the proximity inspection probe 50 can be prevented from reaching the high voltage portion 40H. More specifically, the first wall portion 30b and the second wall portion 30c can prevent the proximity inspection probe 50 from reaching the high voltage portion 40H.

  Here, in FIG.7 and FIG.8, sectional drawing of the battery monitoring apparatus 10 concerning a related technique was shown. Specifically, FIGS. 7 and 8 are views corresponding to FIG. 7 and 8, the same members as those shown in FIG. 5 are given the same reference numerals for the sake of convenience.

  First, the first related technique will be described with reference to FIG.

  This technique is a contact prevention measure that covers the battery monitoring device 10 with a protective cover 52. In FIG. 7, an example in which the protective cover 52 is fixed to the place where the battery monitoring device 10 is mounted by the bolt 54 is shown. Here, there is a case where a measure covered with the protective cover 52 cannot be adopted. Specifically, in order to avoid spatial restrictions on the vehicle on which the battery monitoring device 10 is mounted or to avoid the addition of parts including the protective cover 52 and the process of assembling the protective cover 52, measures to cover the protective cover 52 are taken. There are cases where it cannot be adopted.

  Next, the second related technique will be described with reference to FIG. In addition, in FIG. 8, the code | symbol of a 1st low voltage | pressure connector is described with "23".

  This technique is a contact prevention measure in which the battery monitoring device 10 has a sealed structure. Specifically, the first low-pressure connector 23 for providing a sealed structure includes a seal portion 23a extending in a direction orthogonal to the direction in which the first low-pressure connector 23 extends. Here, there is a case where the measures for the sealed structure cannot be adopted. This is because, for example, it is required to increase the processing accuracy of the portion of the upper case 14b where the seal portion 23a and the upper case 14b are in contact with each other, thereby avoiding an increase in the cost of the battery monitoring device 10. Can occur.

  On the other hand, in the present embodiment, it is possible to prevent contact with the high voltage unit 40H without causing the inconvenience described in the first and second related technologies.

  According to the embodiment described in detail above, the following effects can be obtained.

  (1) The connector cover 30 formed of an insulator is attached to the first low-voltage connector 22 so as to block between the opening 18b and the high voltage portion 40H in the housing case 14. For this reason, even if the proximity test probe 50 is inserted from the outside of the housing case 14 toward the high voltage portion 40H through the gap between the edge of the opening 18b and the first low-voltage connector 22, the probe 50 Can be prevented by the connector cover 30 from reaching the high voltage portion 40H. Thereby, the battery monitoring apparatus 10 can be adapted to laws and regulations that prevent an object from coming into contact with the high voltage part 40H inside the housing case 14 from the outside of the housing case 14.

  In the present embodiment, the connector cover 30 exists in the housing case 14. For this reason, even when the vehicle mounting battery monitoring device 10 has a spatial restriction on the mounting location of the battery monitoring device 10, an object outside the housing case 14 is prevented from coming into contact with the high voltage unit 40H. You can also

  Further, in the present embodiment, a configuration in which the connector cover 30 is attached to the first low-voltage connector 22 is adopted. For this reason, in order to make the battery monitoring apparatus 10 into a sealing structure, the process of the outer surface of the upper cover 18 becomes unnecessary, for example. Thereby, in order to take the measure which prevents that the object outside the storage case 14 contacts the high voltage part 40H, it can avoid that the cost of the battery monitoring apparatus 10 increases.

  (2) A connector cover 30 formed as a separate member from the first low-voltage connector 22 is attached to the first low-voltage connector 22. For example, there may be a situation where there is a spatial restriction for mounting the battery monitoring device 10 or the shape of the first low-voltage connector 22 cannot be changed greatly. Even if such circumstances exist, according to the configuration as a separate member, it is possible to take contact prevention measures without significantly changing the physique of the battery monitoring device 10, or to greatly change the shape of the first low-voltage connector 22. It is possible to take measures to prevent contact without doing so.

  (3) The connector cover 30 includes the first wall portion 30b and the second wall portion 30c. According to such a configuration, the following effects can be achieved.

  In a state where the connector cover 30 is attached to the first low-voltage connector 22 and the circuit board 12 is accommodated in the accommodating case 14, the inside of the upper cover 18 and the portion of the connector cover 30 facing the upper cover 18 are in contact with each other. There is. In this case, there is a concern that a force acts on the circuit board 12 via the connector cover 30 and the first low-voltage connector 22 to which the connector cover 30 is attached, and the reliability of the battery monitoring device 10 is lowered. In order to avoid such a problem, it is required to configure the battery monitoring device 10 so that a gap is formed between the portion of the connector cover 30 facing the upper cover 18 and the inner surface of the upper cover 18. However, if the gap and the opening 18b are close to each other in a direction parallel to the plate surface of the circuit board 12, an object is likely to come into contact with the high voltage portion 40H from outside the housing case 14 via the gap.

  Here, in the present embodiment, since the connector cover 30 includes the first and second wall portions 30b and 30c, the second wall portion 30c is arranged in a direction parallel to the plate surface of the circuit board 12. A gap between the portion facing the upper cover 18 and the inside of the upper cover 18 can be separated from the opening 18b. For this reason, while ensuring the said clearance gap, it can avoid suitably that an object contacts the high voltage part 40H from the storage case 14 exterior via this clearance gap.

  Further, in the present embodiment, a space (an area immediately below the first wall portion 30b in the circuit board 12) sandwiched between the first wall portion 30b and the circuit board 12 exists in the housing case 14. For this reason, in the front view of the plate surface of the circuit board 12, the electronic component can be mounted on the area of the circuit board 12 overlapping the first wall portion 30b. Thereby, by providing the connector cover 30 in the accommodation case 14, it can also suppress that the mounting area of an electronic component reduces.

  (4) The engaging portion 22a is formed in the first low-voltage connector 22, and the connector cover 30 is provided with a claw portion 30d that engages with the engaging portion 22a. Thereby, the connector cover 30 can be attached to the first low-voltage connector 22 without using another component such as a screw. Therefore, in the manufacturing process of the battery monitoring device 10, a screw tightening process for attaching the connector cover 30 and the like can be eliminated.

(Other embodiments)
The above embodiment may be modified as follows.

  The method for attaching the connector cover 30 to the first low-voltage connector 22 is not limited to the one exemplified in the above embodiment. For example, as shown in FIG. 9, a protrusion 30e is provided on the inner surface of the support portion 30a of the connector cover 30, and the connector cover 30 is press-fitted into the first low-pressure connector 22 so that the protrusion 30e causes the first low-pressure. The connector cover 30 may be attached to the first low-voltage connector 22 so as to tighten the connector 22. Here, the protrusion 30e may be integrally formed with resin together with the support 30a and the like. FIG. 9 is a diagram corresponding to FIG.

  Further, for example, the attachment method using the protrusion 30e and the attachment method using the claw portion 30d shown in FIG. 5 may be used in combination.

  The attachment destination of the connector cover 30 is not limited to the first low-voltage connector 22 and may be the circuit board 12. Here, FIG. 10 shows a state in which the connector cover 30 (more specifically, the support portion 30 a of the connector cover 30) is attached to the circuit board 12 with the screws 56. FIG. 10 is a diagram corresponding to FIG.

  The “opening” is not limited to one formed at any of the four corners of the upper surface of the upper cover 18. For example, when the first low-voltage connector 22 is attached to the center of the plate surface of the circuit board 12, an opening may be formed in the center of the upper surface of the upper cover 18. At this time, if the low voltage portion 40L is disposed at the center of the circuit board 12 and the high voltage portion 40H is disposed so as to surround the low voltage portion 40L, the second wall portion 30c is replaced with the first wall portion 30b. It will be formed to extend from the entire outer edge.

  -As the engaging part 22a formed in the 1st low voltage | pressure connector 22, not only a notch-shaped thing but a protrusion-like thing may be sufficient.

  In the above embodiment, a configuration in which the connector cover 30, which is a separate component from the first low-voltage connector 22, is attached to the first low-voltage connector 22 is employed. Instead of this configuration, a configuration in which a blocking portion corresponding to the connector cover 30 is integrally formed with the first low-voltage connector 22 (more specifically, integrally molded without a seam) may be employed.

  The “blocking member” is not limited to one that is seamlessly molded integrally with resin, and may be formed by a combination of a plurality of members (resin members), for example.

  Further, the “blocking member” is not limited to the shape shown in FIG. For example, the connector cover 30 may be formed so that the circuit board 12 side of the second wall portion 30 c extends to the plate surface of the circuit board 12. Even in this case, it is possible to prevent an object inserted from the outside of the housing case 14 from contacting the high voltage unit 40H.

  Furthermore, the “blocking member” is not limited to one formed of resin. As long as it is an insulator, it may be formed of other materials.

  The first wall portion 30b is not limited to the one extending in the plane direction orthogonal to the extending direction of the support portion 30a, and may extend in the plane direction substantially orthogonal to the extending direction of the support portion 30a. Even in this case, the first wall portion 30b and the second wall portion 30c can prevent the object from contacting the high voltage portion 40H.

  The second wall portion 30c is not limited to the one extending from the outer edge of the first wall portion 30b. For example, the second wall portion 30c extends from a portion closer to the first low-voltage connector 22 side than the outer edge of the first wall portion 30b. It may be. Further, the second wall portion 30c is not limited to the one that forms approximately 90 degrees with the first wall portion 30b as long as contact between an object outside the housing case 14 and the high voltage portion 40H can be prevented.

  -The "connector" is not limited to one formed so as to protrude in the normal direction of the plate surface of the circuit board. For example, like the high-voltage connector 20 and the second low-voltage connector 24 shown in FIGS. 1 and 2, an opening is formed on the side surface of the housing case 14 and is formed so as to protrude from the opening. It may be a connector.

  -"Electronic device" is not restricted to what is embodied as a battery monitoring device.

  DESCRIPTION OF SYMBOLS 12 ... Circuit board, 14 ... Housing case, 18b ... Opening part, 22 ... 1st low voltage connector, 30 ... Connector cover, 40L ... Low voltage part, 40H ... High voltage part.

Claims (4)

A housing (14);
A circuit board (12) housed in the housing and having a low voltage part (40L) and a high voltage part (40H);
A connector (22) attached to the low voltage portion of the circuit board and formed so as to protrude from the opening (18b) formed in the housing to the outside of the housing;
A blocking section (22) formed in an insulator so as to block between the opening and the high voltage section in the casing. 30),
Equipped with a,
The connector is formed so as to protrude from the opening in the normal direction of the plate surface of the circuit board,
The blocking part is a blocking member formed as a separate member from the connector,
The blocking member is
A support part (30a) attached to the connector or the circuit board and formed so as to extend in the protruding direction of the connector from the circuit board side toward the opening side;
It is a planar direction substantially orthogonal to the extending direction of the support part, and the circuit board side of both ends of the support part in a direction facing the high voltage part from the connector in a front view of the plate surface of the circuit board A first wall (30b) formed so as to extend from the opposite side;
A second wall portion (30c) formed so as to extend from an outer end portion of the first wall portion in a direction in which the support portion extends from the circuit board side to the opening portion side;
Though electronic device according to claim Rukoto have. The connector includes an engaging portion (22a) on an outer surface thereof,
The blocking member is an electronic device according to claim 1, characterized in that it comprises a pawl portion (30d) for engaging the engaging portion. The circuit board has a rectangular plate shape,
It said connector, said in a front view of the plate surface of the circuit board, according to claim 1 or 2 electronic device according to, characterized in that provided on one of the four corners of the circuit board. The electronic device is a battery monitoring device applied to an assembled battery composed of a series connection of a plurality of battery cells,
A monitoring circuit (42) provided in the high voltage section for monitoring the state of the battery cell;
A low voltage side circuit (46) provided in the low voltage section, to which a monitoring result of the monitoring circuit is transmitted;
Further comprising
Said connector, said electronic device according to any one of claims 1 to 3, wherein the information including the monitoring result transmitted to the low-voltage side circuit is a member for transmitting to the outside.

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