JP2018098056A - Battery device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery device having a small number of parts. A battery device includes a plurality of battery cells in a case. The battery device 10 includes a resin module member provided at one end of the plurality of battery cells 21 and a monitor module 23 having a plurality of monitor connection members connected to the plurality of battery cells. The battery device 10 is supported by the monitor module 23, and includes a water sensor 60 having a water detection electrode located at a water detection position located away from the plurality of battery cells. The water sensor 60 has a water detection electrode supported by the resin member 24 of the monitor module 23. The monitor connection member and the water detection electrode are connected to the electric circuit 50 in the connection region 53 on the substrate 51. [Selection diagram] Figure 1

Description

  The disclosure in this specification relates to a battery device.

  Patent Document 1 discloses a battery device having a submergence detection device. The submergence detection device is provided beside the battery case. The electric circuit arranged together with the battery case is electrically connected to the submergence detection device on the submergence detection device. The electric circuit is also connected to a plurality of batteries in order to monitor the voltages and the like of the plurality of batteries. The contents of the prior art documents listed as the prior art are incorporated by reference as an explanation of the technical elements in this specification.

Japanese Patent Laying-Open No. 2015-81896

  In the configuration of the prior art, a submergence detection device is added to the battery device. In this case, the association between the battery device component and the submergence detection device component is insufficient. For this reason, the number of parts is large. In addition, there is a lack of association between the electrical connection between the electrical circuit and the plurality of batteries and the electrical connection between the electrical circuit and the submergence detection device. For this reason, the several electrical connection part is not arrange | positioned advantageously. The submergence detection device is also called a water sensor. In view of the above or other aspects not mentioned, there is a need for further improvements in battery devices.

  One disclosed object is to provide a battery device with a small number of parts.

  Another object disclosed is to provide a battery device in which an electrical connection between an electrical circuit and a plurality of batteries and an electrical connection between the electrical circuit and a water sensor are advantageously associated. .

  The battery device disclosed herein includes a plurality of battery cells (21), a resin resin member (24) provided at one end of the plurality of battery cells, and a plurality of monitor connections connected to the plurality of battery cells. Water having a monitor module (23) having members (25, 29) and a water detection electrode (61, 62, 63) supported by the monitor module and located at a water detection position positioned away from the plurality of battery cells A sensor (60).

  According to the disclosed battery device, the water sensor is supported by the monitor module. In addition, the water detection position is separated from the plurality of battery cells. For this reason, the influence of the temperature change of a some battery cell can be suppressed.

  The battery device disclosed herein includes a plurality of battery cells (21), a resin resin member (24) provided at one end of the plurality of battery cells, and a plurality of monitor connections connected to the plurality of battery cells. A monitor module (23) having members (25, 29) and a water sensor (60) having water detection electrodes (61, 62, 63) supported by the resin member (24) of the monitor module and positioned at the water detection position With.

  According to the disclosed battery device, the water detection electrode for the water sensor is supported by the resin member of the monitor module. Thereby, a water sensor can be arrange | positioned, arrange | positioning the monitor electrode required in a battery apparatus. As a result, the number of parts is reduced.

  The battery device disclosed herein includes a plurality of battery cells (21), a resin resin member (24) provided at one end of the plurality of battery cells, and a plurality of monitor connections connected to the plurality of battery cells. An electric circuit (50) having a monitor module (23) having members (25, 29) and a substrate (51) and being connected to a plurality of monitor connection members in connection regions (53a, 53b) of a part of the substrate. And a water sensor (60) having a water detection electrode (61, 62, 63) connected to an electric circuit in the connection region and positioned at the water detection position.

  According to the disclosed battery device, a connection for the monitor connection member and a connection for the water sensor are performed in a common connection area on the substrate. As a result, both the connection between the monitor module and the electric circuit and the connection between the water sensor and the electric circuit, which are required in the battery device, reduce the size of the substrate and / or the manufacturing stage. Therefore, it is provided in an advantageous form for efficient connection work.

  The disclosed embodiments of the present specification employ different technical means to achieve each purpose. The reference numerals in parentheses described in the claims and this section exemplify the correspondence with the embodiments described later, and are not intended to limit the technical scope. The objects, features, and advantages disclosed in this specification will become more apparent with reference to the following detailed description and accompanying drawings.

It is a perspective view of the battery device of a 1st embodiment. It is a perspective view which shows the battery unit and electric circuit of 1st Embodiment. It is a perspective sectional view of the battery device of a 1st embodiment. It is a perspective exploded view of the battery unit of a 1st embodiment. It is a perspective view showing a plurality of battery cells of a 1st embodiment. It is a perspective view which shows the monitor module of 1st Embodiment. It is a typical perspective view which shows the monitor module of 1st Embodiment. It is a flowchart which shows the action | operation of 1st Embodiment. It is a typical perspective view which shows the monitor module of 2nd Embodiment. It is a typical perspective view which shows the monitor module of 3rd Embodiment.

  A plurality of embodiments will be described with reference to the drawings. In embodiments, functionally and / or structurally corresponding parts and / or associated parts may be assigned the same reference signs or reference signs that differ by more than a hundred. For the corresponding parts and / or associated parts, the description of other embodiments can be referred to.

1st Embodiment FIG. 1: shows the battery apparatus 10 of the state which removed the cover. In the figure, a perspective view in a regular installation state is shown. Hereinafter, unless otherwise specified, the upper and lower sides in the normal installation state are the upper and lower sides in the figure.

  In FIG. 1, the battery device 10 is mounted on a vehicle. The battery device 10 is mounted inside a vehicle. An example of a vehicle is a vehicle. The battery device 10 is mounted, for example, under a vehicle seat. The battery device 10 cooperates with a generator motor (MG) 15 of the vehicle. The battery device 10 provides a vehicle electric system. The generator motor 15 is connected to an internal combustion engine (EG) 16. The battery device 10 is connected to electric loads (LD1, LD2) 17 and 18 of the vehicle. The electric load 17 is an electric load through which a large current flows, such as a battery and a starter. The electric load 18 is a part or all of a plurality of electric loads of the vehicle excluding the battery and the starter.

  The generator motor 15 functions as a generator when driven by the internal combustion engine 16. At least a part of the electric power generated by the generator motor 15 is supplied to the battery device 10. In this case, the battery device 10 is charged. The generator motor 15 is supplied with electric power from the battery device 10. In this case, the generator motor 15 functions as an electric motor. The generator motor 15 functions as a power source together with the internal combustion engine 16. For example, the generator motor 15 supplies power that exceeds the power supplied by the internal combustion engine 16 or power that assists the power supplied by the internal combustion engine 16.

  The battery device 10 including the cover has a height suitable for mounting under a vehicle seat. The battery device 10 includes a battery unit 20, a base 30, a bus bar unit 40, an electric circuit 50, and a water sensor 60.

  The battery unit 20 includes a case 22 that houses a plurality of battery cells 21. The case 22 is made of an electrically insulating resin. The case 22 is a part of a container that houses a plurality of battery cells 21. The case 22 fixes a plurality of battery cells 21 to each other. Further, the case 22 is also a fixing member that fixes the plurality of battery cells 21 to the base 30.

  The battery unit 20 has a monitor module 23. The monitor module 23 has an electrically insulating resin portion and a monitor connection member connected to the plurality of battery cells 21. Furthermore, the monitor module 23 has a water sensor 60. The water sensor 60 has a plurality of water detection electrodes. The monitor module 23 is arranged along one surface of the case 22 that is a hexahedron. The monitor module 23 is also a lid of the case 22. The detailed shape of the monitor module 23 will be described later.

  The base 30 is made of a conductive metal. The base 30 is made of aluminum die casting. The base 30 has a shape that can be called a shallow dish shape or a shallow cup shape. The battery unit 20, the bus bar unit 40, and the electric circuit 50 are mounted on the base 30. The base 30 provides an outer shape of the battery device 10 together with a cover that is omitted. The base 30 provides a lower shell of the battery device 10. The base 30 has a container portion 31 that is convex downward and concave from above. The container portion 31 has a concave portion in which water can be accumulated inside. The base 30 has a plurality of stays 32. The stay 32 is a fixing part for fixing the battery device 10 to the vehicle. The stay 32 has various shapes.

  The bus bar unit 40 provides a power path extending from the power terminal of the battery unit 20. The bus bar unit 40 has an electrically insulating resin portion and a power connection member connected to the battery unit 20. The bus bar unit 40 is fixed on the base 30. The bus bar unit 40 has a plurality of power terminals 41, 42, 43. The bus bar unit 40 has at least two power connection members. One power connection member is provided between one power terminal of the battery unit 20 and one of the plurality of power terminals 41, 42, 43 to provide an electrical connection. The outer power terminal 41 is connected to the generator motor 15. The inner power terminal 42 is connected to the electric load 17. The power terminal 43 is connected to the electric load 18.

  The electric circuit 50 is fixed on the base 30. The electric circuit 50 extends to the side of the battery unit 20. The electric circuit 50 extends over the side of one side of the battery unit 20 and the side of the other side of the battery unit 20. The electric circuit 50 can be called L-shaped or key-shaped. The battery unit 20 is disposed at one corner of the substantially quadrangular base 30. The electric circuit 50 occupies a key-shaped range that spreads beside the battery unit 20 on the base 30. The electric circuit 50 is disposed along the monitor module 23. One part of the electric circuit 50 is disposed so as to spread laterally on the monitor module 23 side of the battery unit 20. Another part of the electric circuit 50 is arranged beside the battery unit 20 and beside the peripheral surface of the monitor module 23. Such an arrangement contributes to the associated advantageous arrangement of the battery unit 20 and the electric circuit 50.

  The electric circuit 50 includes a substrate 51 and a plurality of electric components 52. The substrate 51 is a so-called printed circuit board. The substrate 51 can be called an L-shape or a key shape. The board | substrate 51 is spread over the horizontal range which the above-mentioned electric circuit 50 occupies. The substrate 51 is a single substrate. On the board | substrate 51, the some electrical component 52 is arrange | positioned along the arrangement | positioning direction axis | shaft 50a which is a predetermined direction. The arrangement direction axis 50 a is an axis extending along the monitor module 23. The substrate 51 has a plurality of connection portions along the arrangement direction axis 50a. In other words, the plurality of connecting portions are arranged in a row along the arrangement direction axis 50a. Part or all of the plurality of connection portions provide connection between the power connection member of the bus bar unit 40 and the electric circuit 50.

  The plurality of electrical components 52 provide a control device. The control device monitors each voltage of the plurality of battery cells 21 included in the battery unit 20. The control device monitors the charge state and the discharge state of each of the plurality of battery cells 21. The control device appropriately controls the state of charge of each of the plurality of battery cells 21.

  When water is spilled on the seat, water may enter the battery device 10 when an occupant who is wet with water uses the seat, or when the vehicle is immersed in water. In this case, the battery device 10 may discharge using water as a discharge path. In this embodiment, a water sensor 60 that detects water in the battery device 10 and a control device that executes countermeasure processing when water is detected are provided. The control device monitors water intrusion into the battery device 10. The control device performs countermeasures when water intrusion is detected. The countermeasure process is, for example, to turn off a breaker element that is one of the plurality of electrical components 52.

  The control system provided by the electric circuit 50 provides a control unit (ECU). The control device is an electronic control unit. The control device has at least one arithmetic processing unit (CPU) and at least one memory device (MMR) as a storage medium for storing programs and data. The control device is provided by a microcomputer including a computer-readable storage medium. The storage medium is a non-transitional tangible storage medium that stores a computer-readable program in a non-temporary manner. The storage medium can be provided by a semiconductor memory or a magnetic disk. The controller can be provided by a computer or a set of computer resources linked by a data communication device. The program is executed by the control device to cause the control device to function as the device described in this specification and to cause the control device to perform the method described in this specification.

  The control system includes a plurality of signal sources that supply signals indicating information input to the control device as input devices. The control system acquires information by the control device storing the information in the memory device. The control system has a plurality of control objects whose behavior is controlled by the control device as output devices. The control system controls the behavior of the control object by converting information stored in the memory device into a signal and supplying the signal to the control object.

  The control device, the signal source, and the control object included in the control system provide various elements. At least some of these elements can be referred to as blocks for performing functions. In another aspect, at least some of these elements can be referred to as modules or sections that are interpreted as configurations. Furthermore, the elements included in the control system can also be referred to as means for realizing the functions only when intentional.

  The means and / or functions provided by the control system can be provided by software recorded in a substantial memory device and a computer that executes the software, software only, hardware only, or a combination thereof. For example, if the controller is provided by an electronic circuit that is hardware, it can be provided by a digital circuit including a number of logic circuits, or an analog circuit. The electric circuit 50 may include a circuit as an inverter and / or a converter, and a monitor circuit that observes the voltages of the plurality of battery cells 21. In this case, the control device is accommodated in a separate electric circuit container.

  The electric circuit 50 has a connection region 53 and a mounting region 54. The substrate 51 has a connection area 53 and a mounting area 54. In the connection area 53, a monitor connection area 53a where a plurality of connection terminals for a plurality of monitor connection members are located and a water sensor connection area 53b where a plurality of connection terminals for the water sensor 60 are located are arranged. Yes. A plurality of lands in which these connection terminals are positioned and soldered are arranged on the substrate 51. The mounting area 54 is provided outside the connection area 53. The mounting area 54 is located beside the connection area 53. The mounting area 54 extends in front of the monitor module 23. In other words, the mounting area 54 extends on the large main surface of the plate-like monitor module 23 so as to intersect the main surface. In the mounting area 54, a plurality of electrical components 52 are mounted.

  The connection area 53 is located beside the case 22 and beside the monitor module 23. The connection region 53 is located beside the case 22 and beside the peripheral surface of the monitor module 23. The connection area 53 extends over an elongated area. The connection area 53 extends to the side of the peripheral surface of the monitor module 23. The connection area 53 extends in the thickness of the monitor module 23.

  The monitor connection area 53 a and the water sensor connection area 53 b are arranged side by side on the substrate 51. The monitor connection region 53a and the water sensor connection region 53b are arranged in a straight line on the substrate 51. The monitor connection area 53a and the water sensor connection area 53b are arranged such that a plurality of connection terminals in them are arranged along one or a plurality of straight lines. The monitor connection region 53a and the water sensor connection region 53b are disposed on the substrate 51 in contact with each other. The monitor connection region 53a and the water sensor connection region 53b are arranged on the substrate 51 without positioning the electrical component 52 therebetween. The monitor connection area 53 a and the water sensor connection area 53 b are located beside the mounting area 54. The distance between the monitor connection area 53a and the mounting area 54 is equal to the distance between the water sensor connection area 53b and the mounting area 54.

  FIG. 2 shows the battery unit 20 and the electric circuit 50. The connection area 53 is located beside the peripheral surface of the monitor module 23. Six connection terminals are positioned in the monitor connection region 53a. Three connection terminals are positioned in the water sensor connection region 53b.

  FIG. 3 is a cross-sectional view of the battery device 10 excluding the cover. In this cross-sectional view, a cross section of the front surface of the monitor module 23 is shown. In the drawing, a cross section of the base 30 is shown. In the drawing, a cross section of the bus bar unit 40 is shown. In the drawing, a cross section of the substrate 51 is shown.

  The monitor module 23 has a resin member 24 made of resin provided at one end of a case 22 that houses a plurality of battery cells 21. The monitor module 23 has a plurality of monitor connection members connected to the plurality of battery cells 21. The monitor connection member has a connection terminal 25 and a connection terminal 29.

  The water sensor 60 has a plurality of water detection electrodes 61, 62, 63. The water sensor 60 is also called a submergence detector. The plurality of water detection electrodes 61-63 are supported apart from each other by an electrically insulating resin member 64. The plurality of water detection electrodes 61, 62, 63 are supported by being assembled to the resin member 64 or by insert molding. The plurality of water detection electrodes 61-63 have connection terminals 61 a, 62 a, 63 a connected to the substrate 51. The connection terminals 61a, 62a, 63a are disposed through the substrate 51. The plurality of water detection electrodes 61-63 have exposed portions 61b, 62b, 63b positioned at the water detection position 65. The water detection position 65 is a cavity in the base 30. The water detection position 65 is a part of the container part 31. The water detection position 65 is the lowest position in the container part 31. The water detection position 65 is below the substrate 51. The water detection position 65 is located directly below the water sensor connection region 53b. Therefore, the water detection position 65 is away from the case 22. The water detection position 65 does not face the case 22.

  The water sensor 60 is supported by the monitor module. The water detection position 65 is positioned away from the plurality of battery cells 21. The water detection electrodes 61, 62, 63 are exposed at the water detection position 65 by a plurality of exposed portions 61b, 62b, 63b. The plurality of exposed portions 61 b, 62 b, 63 b are exposed along the direction away from the plurality of battery cells 21 in the water detection position 65. The plurality of exposed portions 61 b, 62 b and 63 b are arranged in order along a line extending away from the case 22. The water detection electrodes 61, 62 and 63 are supported by the resin member 24 of the monitor module 23.

  The resin member 64 is integral with the resin member 24 of the monitor module 23. The resin member 64 and the resin member 24 are a continuous body of the same resin material. The resin member 64 and the resin member 24 are integrally formed. A part of the water detection electrodes 61, 62, 63 is covered with the resin member 64. The exposed portions 61b, 62b, 63b of the water detection electrodes 61, 62, 63 are exposed from the resin member 64.

  The resin member 24 of the monitor module 23 holds a plurality of connection terminals 25a, 25b, 25c, 25d, and 25f. These connection terminals 25a-25f are part of the monitor connection member. The resin member 24 supports a plurality of monitor connection members. All or some of the plurality of monitor connection members are assembled to the resin member 24 or supported by insert molding. The six connection terminals 25a-25f are connected to the substrate 51. The connection terminals 25a-25f are disposed through the substrate 51.

  In a part of the connection region 53 of the substrate 51, the connection terminals 25 of the plurality of monitor connection members and the electric circuit 50 are connected. In the same connection region 53, the water detection electrodes 61, 62, 63 and the electric circuit 50 are connected. The water sensor 60 is connected to the electric circuit 50 in the connection region 53 and has water detection electrodes 61, 62, 63 exposed at the water detection position 65. A monitor connection region 53 a that connects the plurality of monitor connection members and the electric circuit 50 and a water sensor connection region 53 b that connects the water detection electrodes 61, 62, 63 and the electric circuit 50 are adjacent to each other on the substrate 51. Yes. The monitor module 23 has a plate shape. The monitor module 23 is provided so as to intersect with the substrate 51. The monitor connection area 53 a and the water sensor connection area 53 b are arranged along the monitor module 23. The plurality of monitor connection members have a plurality of connection terminals 25 arranged in rows along a predetermined direction. The water detection electrodes 61, 62, and 63 are arranged in a row along the direction of the row of the plurality of connection terminals 25.

  FIG. 4 is an exploded perspective view of the battery unit 20. The battery unit 20 accommodates a plurality of battery cells in a case 22 having an opening on the side. The plurality of battery cells are arranged sideways so that the terminals are exposed on one side facing the side. Therefore, the battery unit 20 has components such as the monitor module 23 on one side. The assembly direction of these components is transverse to the case 22 in the regular installation state of the product.

  The battery unit 20 includes a plurality of conductors 26 that connect a plurality of battery cells. The plurality of conductors 26 connect a plurality of battery cells in series. The battery unit 20 has a plurality of monitor terminals 27. The monitor terminal 27 is used for detecting at least the voltage of the battery cell. The battery unit 20 has a gasket member 28. The gasket member 28 is disposed between the plurality of battery cells and the monitor module 23. The monitor module 23 has a connection terminal 29. The connection terminal 29 receives the monitor terminal 27. The connection terminal 29 and the monitor terminal 27 are electrically connected.

  FIG. 5 shows a plurality of battery cells 21. In the illustrated example, the battery unit 20 includes five battery cells 21. In the drawing, a plurality of conductors 26a, 26b, 26c, 26d, 26e, and 26f are shown. In the illustrated example, six monitor terminals 27 are provided. One monitor terminal 27 is provided on one conductor 26. Each of the five battery cells 21 is monitored by the six monitor terminals 27. In the figure, a plurality of monitor terminals 27a, 27b, 27c, 27d, 27e, and 27f are shown.

  FIG. 6 shows the monitor module 23. Since the resin member 24 and the resin member 64 are continuous, the monitor module 23 and the water sensor 60 are integrated. The monitor module 23 and the water sensor 60 can be handled as one component. The water sensor 60 has three water detection electrodes 61-63. The monitor module 23 has a plurality of connection terminals 25a-25f.

  The plurality of connection terminals 25a-25f and the plurality of connection terminals 61a-63a have the same shape. The plurality of connection terminals 25 a-25 f and the plurality of connection terminals 61 a-63 a extend from one plane of the monitor module 23. This plane is located on the peripheral surface of the monitor module 23. The plurality of connection terminals 25a-25f and the plurality of connection terminals 61a-63a extend from the monitor module 23 in the same direction.

  In the drawing, a plurality of connection terminals 29a, 29b, 29c, 29d, 29e, and 29f are shown. One of the plurality of connection terminals 29a, 29b, 29c, 29d, 29e, and 29f is associated with one of the plurality of monitor terminals 27a, 27b, 27c, 27d, 27e, and 27f. One of the plurality of connection terminals 29a, 29b, 29c, 29d, 29e, and 29f receives one of the plurality of monitor terminals 27a, 27b, 27c, 27d, 27e, and 27f and is electrically connected. The connection terminal 29 and the monitor terminal 27 can be connected by various connection methods such as screw tightening, soldering, and caulking. One monitor connection member connects one of the plurality of connection terminals 25a-25f and one of the plurality of connection terminals 29a-29f.

  FIG. 7 schematically shows the monitor module 23. The monitor module 23 is modeled in a plate shape having a predetermined thickness that can hold the monitor connection member. The monitor module 23 has the widest main surface 23a corresponding to both sides. The monitor module 23 has a peripheral surface 23b surrounding the periphery. The peripheral surface 23b can be provided by a plurality of surfaces or continuous surfaces. The monitor module 23 is L-shaped. The monitor module 23 has a protruding portion 23c that protrudes laterally. The protruding portion 23c extends along the main surface 23a. The protruding portion 23c is smaller than the main surface 23a. The protruding portion 23 c is located below the monitor module 23. The protruding portion 23 c is located above the lowermost portion of the monitor module 23 so as to partition the water detection position 65 on the lower side.

  The protruding portion 23c is also a holding portion where the plurality of connection terminals 25a-25f and the plurality of connection terminals 61a-63a are held. The protruding portion 23 c extends in order to connect the plurality of connection terminals 25 a to 25 f and the plurality of connection terminals 61 a to 63 a to the substrate 51. The protruding portion 23c is along a straight line 20a extending along the main surface 23a.

  The protruding portion 23 c is also a protruding portion in the battery unit 20. The battery unit 20 has a shape that can be called a rectangular parallelepiped. This is because the case 22 has positioning protrusions and stays with bolt holes. The protruding portion 23c extends from the rectangular parallelepiped. The case 22 has an opening on the side where the monitor module 23 is installed. The case 22 receives the plurality of battery cells 21 from the opening.

  The plurality of battery cells 21 are housed in the case 22 along a housing direction (a direction opposite to the projection direction PD) extending in the lateral direction. The water detection position 65 is disposed outside the projection range PR of the plurality of battery cells 21 whose projection direction PD is the direction opposite to the accommodation direction. In other words, when the opposite projection direction PD is set along the mounting direction of the plurality of battery cells 21 to the battery unit 20 and the projection range PR of the case 22 is defined, the protruding portion 23c is more than the projection range PR. Projects laterally. This horizontal direction is a horizontal direction orthogonal to the projection direction PD.

  The protruding portion 23c has a monitor holding portion 23d in which a plurality of connection terminals 25a-25f are held. The protruding portion 23c has a water sensor holding portion 23e in which the connection terminals 61a-63a are held. The monitor holding portion 23d and the water sensor holding portion 23e extend along the main surface 23a but are aligned along the straight line 20a. The water sensor holding part 23e is located outside the monitor holding part 23d.

  The monitor holding portion 23d has a terminal surface 23g on which a plurality of connection terminals 25 (25a-25f) are arranged. The water sensor holding part 23e has a terminal surface 23h on which a plurality of connection terminals 61a, 62a, 63a are arranged. The terminal surface 23g and the terminal surface 23h are part of the peripheral surface 23b of the monitor module 23. The terminal surface 23g and the terminal surface 23h are immediately adjacent to each other.

  FIG. 8 shows a control process 170 associated with the water sensor 60. When water is detected by the water sensor 60, the control device provided by the electric circuit 50 executes countermeasure processing for controlling the electric component 52 so as to provide a breaker function. The control device executes a control process 170.

  In step 171, water detection processing is executed by the water sensor 60. The control device detects an electrical variable between the plurality of water detection electrodes 61-63, for example, a resistance value or a capacitance. The presence or absence of water at the water detection position 65 is detected by this electrical variable.

  The battery device 10 may generate condensed water inside due to temperature changes in the battery unit 20 and the electric circuit 50. Condensed water may accumulate in the base 30 that is a container of the battery device 10. In this case, the water sensor 60 may malfunction by detecting condensed water.

  In this embodiment, the water sensor 60 is positioned away from the battery unit 20. The water sensor 60 is positioned outside the projection range PR. The water sensor 60 is positioned farther from the battery unit 20 than the monitor holding portion 23d. Thereby, the influence by the temperature change of the battery unit 20 is suppressed. That is, the malfunction of the water sensor 60 by detecting condensed water is suppressed.

  In step 172, it is determined whether or not there is water at the water detection position 65. If there is no water, the process returns to step 171. If there is water, go to step 173. In step 173, countermeasure processing is executed. For example, the connection between the battery unit 20 and the power terminals 41, 42, 43 is blocked by the plurality of electrical components 52.

  According to this embodiment, the water sensor 60 is positioned away from the battery unit 20. Thereby, the influence by the temperature change of the battery unit 20 is suppressed. According to this embodiment, the water sensor 60 and the monitor module 23 are integrated. Water detection electrodes 61-63 of the water sensor 60 are held by the resin member 24 of the monitor module 23. Therefore, the number of parts can be reduced. According to this embodiment, the connection terminals 61a, 62a, 63a for the water sensor 60 and the connection terminals 25a, 25b, 25c, 25d, 25e, 25f for the monitor module 23 are arranged side by side. For this reason, the connection of the plurality of connection terminals and the electric circuit 50 can be concentrated. The monitor connection member held by the monitor module 23 can have a shape that can be laid in the thickness of the resin member 24 between the connection terminal 25 and the connection terminal 29, that is, the thickness of the monitor module 23.

Second Embodiment This embodiment is a modified example based on the preceding embodiment. In the said embodiment, the monitor module 23 and the water sensor 60 are integrated by making the resin member 24 and the resin member 64 into continuous resin. Instead, in this embodiment, the monitor module 23 and the water sensor 60 are integrated by connecting the water sensor 60 formed separately.

  In FIG. 9, the water sensor holding portion 23 e has a resin member 264 that is separate from the resin member 24. The water sensor holding portion 23e is connected to a region indicated by hatching in the monitor module 23. For the connection between the monitor module 23 and the water sensor 60, various connection mechanisms such as adhesion and fastening with a fastening member such as a bolt or a screw can be used.

Third Embodiment This embodiment is a modification in which the preceding embodiment is a basic form. In the above embodiment, the monitor holding portion 23d and the water sensor holding portion 23e are arranged along the straight line 20a parallel to the main surface 23a. Instead, in this embodiment, the monitor holding portion 23d and the water sensor holding portion 23e are arranged side by side along a straight line 320a perpendicular to the main surface 23a.

  In FIG. 10, the water sensor holding portion 23 e is formed by the resin member 24. By using the resin member 24 and the resin member 64 as a continuous resin, the monitor module 23 and the water sensor 60 are integrated. The monitor holding part 23d and the water sensor holding part 23e are arranged side by side along a straight line 320a perpendicular to the main surface 23a.

  Also in this embodiment, the water sensor 60 is positioned away from the battery unit 20. Also in this embodiment, the water sensor 60 and the monitor module 23 are integrated. Water detection electrodes 61-63 of the water sensor 60 are held by the resin member 24 of the monitor module 23. Also in this embodiment, the connection terminals 61a, 62a, and 63a for the water sensor 60 and the connection terminals 25a, 25b, 25c, 25d, 25e, and 25f for the monitor module 23 are arranged side by side.

Other Embodiments The disclosure herein is not limited to the illustrated embodiments. The disclosure encompasses the illustrated embodiments and variations by those skilled in the art based thereon. For example, the disclosure is not limited to the combinations of parts and / or elements shown in the embodiments. The disclosure can be implemented in various combinations. The disclosure may have additional parts that can be added to the embodiments. The disclosure includes those in which parts and / or elements of the embodiments are omitted. The disclosure encompasses the replacement or combination of parts and / or elements between one embodiment and another. The technical scope disclosed is not limited to the description of the embodiments. Some technical scope disclosed is shown by the description of the scope of claims, and should be understood to include all modifications within the meaning and scope equivalent to the description of the scope of claims.

  In the above embodiment, the single substrate 51 is employed. Instead of this, the substrate 51 may be provided as an aggregate of a plurality of unit substrates. In the above embodiment, the plurality of conductors 26 connect a plurality of battery cells in series. Instead of this, the plurality of battery cells may be connected in parallel. A plurality of parallel connection portions may be connected in series.

10 Battery device,
20 battery units, 21 battery cells, 22 cases,
23 monitor module, 24 resin member, 25 connection terminal, 29 connection terminal,
30 bases, 31 container parts, 32 stays,
40 busbar units, 41, 42, 43 terminals,
50 electrical circuit, 51 substrate, 52 electrical component, 53 connection area,
60 Water sensor 61, 62, 63 Water detection electrode,
61a, 62a, 63a connection terminal,
61b, 62b, 63b exposed portion, 64 resin member, 65 water detection position.

Claims (10)

A plurality of battery cells (21);
A resin module (24) made of resin provided at one end of the plurality of battery cells, and a monitor module (23) having a plurality of monitor connection members (25, 29) connected to the plurality of battery cells;
A battery device comprising a water sensor (60) supported by the monitor module and having water detection electrodes (61, 62, 63) positioned at water detection positions positioned away from the plurality of battery cells.   The plurality of battery cells are accommodated in a case along a laterally extending accommodation direction, and the water detection position is outside a projection range of the plurality of battery cells with the accommodation direction as a projection direction. The battery device according to claim 1 arranged.   The said water detection electrode has the some exposed part (61b, 62b, 63b) exposed along the direction which leaves | separates from the said some battery cell in the said water detection position. The battery device described.   The battery device according to claim 1, wherein the water detection electrode is supported by the resin member of the monitor module. A plurality of battery cells (21);
A resin module (24) made of resin provided at one end of the plurality of battery cells, and a monitor module (23) having a plurality of monitor connection members (25, 29) connected to the plurality of battery cells;
A battery device comprising a water sensor (60) having water detection electrodes (61, 62, 63) supported by the resin member (24) of the monitor module and positioned at a water detection position. And an electrical circuit (50) having a substrate,
A plurality of the monitor connection members and the electric circuit are connected in a partial connection region (53a, 53b) of the substrate, and the water detection electrode and the electric circuit are connected in the connection region. The battery device according to any one of claims 1 to 5. A plurality of battery cells (21);
A resin module (24) made of resin provided at one end of the plurality of battery cells, and a monitor module (23) having a plurality of monitor connection members (25, 29) connected to the plurality of battery cells;
An electric circuit (50) having a substrate (51) and connected to a plurality of the monitor connection members in a partial connection region (53a, 53b) of the substrate;
A battery device comprising: a water sensor (60) having a water detection electrode (61, 62, 63) connected to the electric circuit in the connection region and located at a water detection position.   A monitor connection region (53a) for connecting the plurality of monitor connection members and the electric circuit, and a water sensor connection region (53b) for connecting the water detection electrode and the electric circuit are adjacent to each other on the substrate. The battery device according to claim 6 or 7.   The monitor module is plate-shaped and is provided so as to intersect with the substrate, and the monitor connection region and the water sensor connection region are disposed along the monitor module. Battery device. The plurality of monitor connection members have a plurality of connection terminals (25) arranged in rows along a predetermined direction,
10. The battery device according to claim 6, wherein the water detection electrode has a plurality of connection terminals (61 a to 63 a) arranged in a row along the predetermined direction. 11.

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