Device module

Abstract

To provide a device module that prevents unintentional simultaneous activation of a series relay and a parallel relay.SOLUTION: The device module switches between series connection and parallel connection of a first battery and a second battery. The device module includes a series relay 26 and parallel relays 53, 54. The series relay has a series fixed terminal 160S, a series movable terminal 170S that comes into contact with and separates from the series fixed terminal, and a series rod 129S that is passed through the series movable terminal so as to guide the movement of the series movable terminal. The parallel relay has parallel fixed terminals 160N, 160P, parallel movable terminals 170N, 170P that come into contact with and separate from the parallel fixed terminals, and parallel rods 129N, 129P that are passed through the parallel movable terminals to guide the movement of the parallel movable terminals. The extension direction of the series rod is different from the extension direction of the parallel rod.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The disclosure described in this specification relates to a device module.

Background Art

[0002] Patent Document 1 describes a vehicle equipped with a power storage device. The power storage device includes two battery modules and three relays. One relay is provided on the electric wire connecting the positive electrodes of the two battery modules. Another relay is provided on the electric wire connecting the positive electrode of one battery module and the negative electrode of another battery module. Still another relay is provided on the electric wire connecting the negative electrodes of the two battery modules. The three relays are arranged in a manner that can switch between a series state and a parallel state in a circuit including two battery modules.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When an electromagnetic mechanical relay is adopted as a switch, if large vibrations or the like occur, there is a risk that the three relays may simultaneously turn on unintentionally.

[0005] An object of the present disclosure is to provide a device module in which the simultaneous turning on of a series relay and a parallel relay is suppressed unintentionally.

Means for Solving the Problems

[0006] A device module according to an aspect of the present disclosure is a device module (10) that switches between series connection and parallel connection of a first battery (2A) and a second battery (2B), A series relay (26) for connecting the first battery and the second battery in series, and parallel relays (53, 54) for connecting the first battery and the second battery in parallel, wherein the series relay and the parallel relays have connection fixed terminals (160S, 160N, 160P) electrically connected to different current paths; the series relay includes a series fixed terminal (160S) which is a connection fixed terminal of the series relay, a series movable terminal (170S) that contacts and separates from the series fixed terminal, and a series rod (129S) passed through the series movable terminal to guide the movement of the series movable terminal; the parallel relays include parallel fixed terminals (160N, 160P) which are connection fixed terminals of the parallel relays, parallel movable terminals (170N, 170P) that contact and separate from the parallel fixed terminals, and parallel rods (129N, 129P) passed through the parallel movable terminals to guide the movement of the parallel movable terminals; the extending direction of the series rod is different from the extending direction of the parallel rods.

[0007] According to this, it is possible to prevent the series relay (26) and the parallel relays (53, 54) from simultaneously turning on due to large vibrations or the like unintentionally.

[0008] Note that the reference numerals in the parentheses above only indicate the correspondence with the configurations described in the embodiments below, and do not limit the technical scope in any way.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Modes for Carrying Out the Invention

[0010] Hereinafter, a plurality of modes for carrying out the present disclosure will be described with reference to the drawings. In each mode, the same reference numerals may be given to the parts corresponding to the matters described in the preceding mode, and redundant descriptions may be omitted. When only a part of the configuration is described in each mode, the other modes described previously can be applied to the other parts of the configuration.

[0011] In addition, not only the combinations of the parts clearly indicating that combinations are possible in each embodiment, but also the embodiments, the embodiments and the modified examples, and the modified examples can be partially combined with each other without particular hindrance to the combination.

[0012] (First Embodiment) The high-voltage junction box (hereinafter, high-voltage J / B) 10 according to the first embodiment of FIG. 1 is used in an electric vehicle such as a BEV (Battery Electric Vehicle). The high-voltage J / B 10 is mounted on an electric vehicle together with a battery device 2, a power conversion device 3, a charging inlet 4, and the like. The high-voltage J / B 10 is electrically connected to the battery device 2, the power conversion device 3, the charging inlet 4, and the like. The high-voltage J / B 10 may be referred to as a device module. The battery device 2 may be referred to as a power supply device.

[0013] The battery device 2 has a first battery 2A and a second battery 2B. The first battery 2A and the second battery 2B include a plurality of battery cells. This battery cell is a secondary battery such as a lithium battery, for example. The first battery 2A and the second battery 2B are configured by electrically connecting a plurality of battery cells in series. Note that the first battery 2A may be referred to as the first battery. The second battery 2B may be referred to as the second battery.

[0014] In the present embodiment, the number of battery cells included in the first battery 2A and the second battery 2B is equal. The first battery 2A and the second battery 2B output power supply power of approximately 400V. The power supply power may be referred to as output power. Power supply power of approximately 400V is individually output from the first battery 2A or the second battery 2B. Alternatively, integrated power supply power of approximately 800V is output from the first battery 2A and the second battery 2B. In a state where the first battery 2A and the second battery 2B are connected in series, the rated voltage of the battery device 2 is 800V. In a state where the first battery 2A and the second battery 2B are connected in parallel, the rated voltage of the battery device 2 is 400V. Note that the voltages of the first battery 2A and the second battery 2B do not have to be the same.

[0015] The switching of the output of the related power supply power is executed by the high-voltage J / B10. The high-voltage J / B10 may be referred to as a power distribution device. By switching the output of the power supply power by the high-voltage J / B10, power supply power of approximately 400V or approximately 800V is supplied to the power conversion device 3.

[0016] The power conversion device 3 mainly has an inverter. The inverter is connected to the motor generator of the electric vehicle. The inverter converts the supplied DC power supply into AC power. This AC power is supplied to the motor generator. The motor generator is powered by this AC power. By the power, the driving wheels of the electric vehicle rotate autonomously. Also, the motor generator converts the kinetic energy of the driving wheels into electrical energy. The motor generator performs regenerative power generation. The AC power generated by the regenerative power generation is converted into DC power by the power conversion device 3. This DC power is supplied to the battery device 2 via the high voltage J / B10.

[0017] A charging cable of a charging stand 6 provided outside the vehicle is connected to the charging inlet 4. DC power for charging the battery device 2 is applied to the charging inlet 4. The charging inlet 4 supplies the DC power input from the charging stand 6 to the high voltage J / B10. The charging stand 6 is provided in a charging facility or the like. Charging from the charging stand 6 to the battery device 2 is performed via the charging inlet 4. The charging stand 6 may be referred to as an external charger. There are a normal charger and a rapid charger in the charging stand 6.

[0018] As an example of a normal charger, it includes a single-phase AC power supply of voltage 200V or 100V and is configured to supply AC power with an output of about 3kW (voltage 200V, maximum current 15A). As an example of a rapid charger, it is configured to supply DC power with a maximum output of 160kW (maximum voltage 400V, maximum current 400A). This rapid charger may be referred to as a low-voltage rapid charger. As another example of a rapid charger, it is configured to supply DC power with a maximum output of 160kW (maximum voltage 800V, maximum current 200A). This rapid charger may be referred to as a high-voltage rapid charger.

[0019] Quick charging is a charging method aimed at charging the battery device 2 in a short time, which is performed by passing a large current through the battery device 2. Quick charging is carried out with a direct current. The charging in this embodiment can also be said to be DC (Direct Current) charging. Note that a large current is a current larger than that in normal charging. A short time is a time shorter than that in normal charging. In this embodiment, an example is adopted in which charging from the charging stand 6 to the battery device 2 is performed by a quick charger.

[0020] The high-voltage J / B 10 includes a power control circuit 70 and a fixing base 80 for fixing the power control circuit 70. The power control circuit 70 includes a plurality of current paths. The power control circuit 70 performs switching of the plurality of current paths. The power control circuit 70 includes a first wiring 20, a second wiring 30, and a third wiring 50. The first wiring 20, the second wiring 30, and the third wiring 50 are formed of a copper plate member such as a bus bar.

[0021] The first wiring 20 is a power line that serially connects the first battery 2A and the second battery 2B and is connected to the power conversion device 3. The first wiring 20 has a first connection piece 21, a second connection piece 22, and a third connection piece 23. The first connection piece 21 connects the power conversion device 3 and the first battery 2A. The second connection piece 22 connects the power conversion device 3 and the second battery 2B. The third connection piece 23 connects the first battery 2A and the second battery 2B. The first connection piece 21 connects the positive electrode 3A of the power conversion device 3 and the positive electrode of the first battery 2A. The second connection piece 22 connects the negative electrode 3B of the power conversion device 3 and the negative electrode of the second battery 2B. The third connection piece 23 connects the negative electrode of the first battery 2A and the positive electrode of the second battery 2B.

[0022] The second wiring 30 is a power line connected to the first wiring 20 and the charging inlet 4. The second wiring 30 has a positive electrode side second wiring 31 and a negative electrode side second wiring 32. The positive electrode side second wiring 31 connects the first connection piece 21 and the positive electrode side of the charging inlet 4. The negative electrode side second wiring 32 connects the second connection piece 22 and the negative electrode side of the charging inlet 4. The charging inlet 4 has a positive electrode side charging inlet 4A connected to the positive electrode 6A of the charging stand 6 and a negative electrode side charging inlet 4B connected to the negative electrode 6B of the charging stand 6. The first connection piece 21 and the positive electrode side second wiring 31 are electrically connected at the first connection portion 41. The third connection piece 23 and the negative electrode side second wiring 32 are electrically connected at the second connection portion 42.

[0023] The third wiring 50 is a power line connected to the second connection piece 22 and the connection portions 41, 42. The third wiring 50 has a positive electrode side third wiring 51 and a negative electrode side third wiring 52. The positive electrode side third wiring 51 connects the third connection piece 23 and the first connection portion 41. The negative electrode side third wiring 52 connects the third connection piece 23 and the second connection portion 42.

[0024] In addition to the wirings 20, 30, 50, the power control circuit 70 has seven relays 24, 25, 26, 33, 34, 53, 54. The seven relays 24, 25, 26, 33, 34, 53, 54 are a system main relay 24, 25, switching relays 26, 53, 54, and charging relays 33, 34. The system main relays 24, 25 have a positive electrode side system main relay 24 and a negative electrode side system main relay 25. The switching relays 26, 53, 54 have a series relay 26 and parallel relays 53, 54. The parallel relays 53, 54 have a positive electrode side parallel relay 54 and a negative electrode side parallel relay 53. The charging relays 33, 34 have a positive electrode side charging relay 33 and a negative electrode side charging relay 34. Note that the positive electrode side parallel relay 54 may be referred to as the first parallel relay. The negative electrode side parallel relay 53 may be referred to as the second parallel relay.

[0025] The positive - side system main relay 24 is provided on the first connection piece 21. The positive - side system main relay 24 is provided between the connection part of the power conversion device 3 and the first connection part 41 on the first connection piece 21. The negative - side system main relay 25 is provided on the second connection piece 22. The negative - side system main relay 25 is provided between the connection part of the power conversion device 3 and the second connection part 42 on the second connection piece 22. The series relay 26 is provided on the third connection piece 23.

[0026] The positive - side charging relay 33 is provided on the positive - side second wiring 31. The negative - side charging relay 34 is provided on the negative - side second wiring 32. The positive - side parallel relay 54 is provided on the positive - side third wiring 51. One end of the positive - side third wiring 51 is connected to the first connection part 41. The other end of the positive - side third wiring 51 is connected between the connection part with the series relay 26 and the connection part with the second battery 2B on the third connection piece 23. The connection part between the other end of the positive - side third wiring 51 and the third connection piece 23 may be referred to as the third connection part 61. A closed loop is formed by the positive - side third wiring 51, the third connection piece 23, the series relay 26, the first battery 2A, and a part of the first connection piece 21.

[0027] The negative - side parallel relay 53 is provided on the negative - side third wiring 52. One end of the negative - side third wiring 52 is connected to the second connection part 42. The other end of the negative - side third wiring 52 is connected between the connection part with the series relay 26 and the connection part with the first battery 2A on the third connection piece 23. The connection part between the other end of the negative - side third wiring 52 and the third connection piece 23 may be referred to as the fourth connection part 62. A closed loop is formed by the negative - side third wiring 52, the third connection piece 23, the series relay 26, the second battery 2B, and a part of the second connection piece 22.

[0028] As will be described in detail later, the system main relays 24, 25, and the series relay 26 are relays used during running at 800V. The charging relays 33, 34, and the series relay 26 are relays used during charging at 800V. The parallel relays 53, 54, and the charging relays 33, 34 are relays used during 400V charging.

[0029] System main relays 24, 25, switching relays 26, 53, 54, and charging relays 33, 34 open and close according to control signals from the ECU. The ECU includes an arithmetic processing unit such as a CPU, a memory device including a RAM and a ROM, and an input / output device. The input / output device is electrically connected to each switching element of the power conversion device 3 and the charging stand 6 in addition to the seven relays 24, 25, 26, 33, 34, 53, 54.

[0030] The arithmetic processing unit executes a program stored in the memory device. The arithmetic processing unit executes arithmetic processing according to the program. Also, the arithmetic processing unit executes arithmetic processing while using data stored in the memory device and the like. Then, the arithmetic processing unit controls each switching element and the seven relays 24, 25, 26, 33, 34, 53, 54 via the input / output device. In the present embodiment, the processing operations performed by the arithmetic processing unit are described as the processing operations of the ECU. The ECU can also be said to be an electronic control unit.

[0031] <800V Travel> The arithmetic processing unit is configured to be electrically connectable to the charging stand 6 via the input / output device. When the arithmetic processing unit does not perform charging from the charging stand 6 to the battery device 2, it outputs on signals for the system main relays 24, 25, and the series relay 26. At the same time, the arithmetic processing unit outputs off signals for the charging relays 33, 34, and the parallel relays 53, 54. According to this, a current path through which the current indicated by the broken line flows in FIG. 2 is formed. The current path is a path including the energized relays 24, 25, 26, the first battery 2A, the second battery 2B, and the first wiring 20.

[0032] Due to the above-described electrical connection configuration, when charging from the charging stand 6 to the battery device 2 is not performed, the first battery 2A and the second battery 2B are electrically connected in series. The potential difference between the first connection piece 21 and the second connection piece 22 is about 800V. The battery device 2 is connected to the power conversion device 3 via the first connection piece 21 and the second connection piece 22. Power supply power of about 800V is supplied to the power conversion device 3.

[0033] The power conversion device 3 converts the supplied power supply power from DC to AC. The converted 800V power supply power is supplied to the motor generator. The motor generator performs power running based on the converted AC power. As a result, the electric vehicle runs.

[0034] <800V Charging> When the charging from the charging stand 6 to the battery device 2 is performed, the arithmetic processing unit outputs off signals for the system main relays 24 and 25. When the charging stand 6 is connected to a high-voltage rapid charger, the arithmetic processing unit outputs on signals for the charging relays 33 and 34 and the series relay 26. In addition, the arithmetic processing unit outputs off signals for the parallel relays 53 and 54 and the system main relays 24 and 25. According to this, a current path through which the current indicated by the broken line flows in FIG. 3 is formed. The current path is a path including the relays 26, 33, and 34 in the energized state, the first battery 2A, the second battery 2B, the positive electrode side second wiring 31, the negative electrode side second wiring 32, and the part connecting the first connection portion 41 and the second connection portion 42 in the first wiring 20.

[0035] Due to the above-described electrical connection configuration, when connected to a high-voltage rapid charger, the first battery 2A and the second battery 2B are electrically connected in series. The potential difference between the positive electrode side second wiring 31 and the negative electrode side second wiring 32 is about 800V. External power of about 800V is supplied to the battery device 2 via a part of the first wiring 20 and the second wiring 30. The battery device 2 is charged by the external power of about 800V.

[0036] <400V Charging> When connected to a low-voltage rapid charger as the charging stand 6, the arithmetic processing unit outputs on-signals for the charging relays 33, 34, and the parallel relays 53, 54. In addition, the arithmetic processing unit outputs off-signals for the series relay 26 and the system main relays 24, 25. According to this, two current-carrying paths indicated by broken lines in Fig. 4 are formed.

[0037] One current path is a path including the relays 33, 34, 53 in the energized state, the battery 2A, the positive electrode side second wiring 31, the negative electrode side second wiring 32, the negative electrode side third wiring 52, and the part connecting the first connection part 41 and the fourth connection part 62 in the first wiring 20. External power of about 400V is supplied to the first battery 2A through this path. The first battery 2A is charged by external power of about 400V.

[0038] Another current path is a path including the relays 33, 34, 54 in the energized state, the second battery 2B, the positive electrode side second wiring 31, the negative electrode side second wiring 32, the positive electrode side third wiring 51, and the part connecting the second connection part 42 and the third connection part 61 in the first wiring 20. External power of about 400V is supplied to the second battery 2B through this path. The second battery 2B is charged by external power of about 400V.

[0039] Note that the output of the on-signals for each of the relays 24, 25, 26, 33, 34, 53, 54 may provide a similar function by stopping the output of the off-signals. The output of the off-signals for each of the relays 24, 25, 26, 33, 34, 53, 54 may provide a similar function by stopping the output of the on-signals.

[0040] <Configuration of Equipment Module> Next, the configuration of the high-voltage J / B10 will be described based on FIG. 5. Note that the components of the high-voltage J / B10 are schematically shown in each drawing. In the following, three directions that are orthogonal to each other are indicated as the X direction, the Y direction, and the Z direction. In the drawings, the description of "direction" is omitted, and only X, Y, and Z are described. The high-voltage J / B10 is provided on the vehicle body. As an example, the high-voltage J / B10 is arranged under the floor of the passenger compartment.

[0041] The high-voltage J / B10 has a power control circuit 70 and a fixed base 80. The fixed base 80 has a substantially rectangular parallelepiped shape. The fixed base 80 has a mounting surface 81 on which the power control circuit 70 is mounted and a placement surface on the back side thereof. Seven relays 24, 25, 26, 33, 34, 53, and 54 are mounted on the mounting surface 81. The direction in which the seven relays 24, 25, 26, 33, 34, 53, and 54 and the fixed base 80 are arranged corresponds to the Z direction. The seven relays 24, 25, 26, 33, 34, 53, and 54 are fixed to the fixed base 80 in the Z direction. The mounting surface 81 and the placement surface are arranged apart from each other in the Z direction. The placement surface is a surface facing the floor of the passenger compartment. By fixing the placement surface to the floor of the passenger compartment, the high-voltage J / B10 is fixed to the vehicle. The fixed base 80 is mainly composed of an insulating resin.

[0042] The mounting surface 81 extends in a planar direction along the X direction and the Y direction. The mounting surface 81 has a first end portion 82 and a third end portion 84 that are separated from each other in the X direction. The mounting surface 81 has a second end portion 83 and a fourth end portion 85 that are separated from each other in the Y direction. The first end portion 82 to the fourth end portion 85 are integrally connected in this order in a clockwise direction.

[0043] The series relay 26 is mounted at the center in the X direction on the mounting surface 81. The parallel relays 53 and 54 are mounted so as to sandwich the series relay 26 from both sides in the X direction. The system main relays 24 and 25 are mounted so as to sandwich the parallel relays 53 and 54 from both sides in the X direction. The charging relays 33 and 34 are mounted so as to sandwich the parallel relays 53 and 54 from both sides in the X direction. Note that the series relay 26 does not necessarily have to be mounted at the center in the X direction on the mounting surface 81. As long as the arrangement order is the above-described mode, the position where the series relay 26 is arranged on the mounting surface 81 is not limited to the center.

[0044] The arrangements of the following seven relays 24, 25, 26, 33, 34, 53, and 54 will be described more specifically below. Taking the series relay 26 as a reference. The positive electrode side parallel relay 54, the positive electrode side system main relay 24, and the positive electrode side charging relay 33 are arranged on the side of the third end portion 84 with respect to the series relay 26. The negative electrode side parallel relay 53, the negative electrode side system main relay 25, and the negative electrode side charging relay 34 are arranged on the side of the first end portion 82 with respect to the series relay 26.

[0045] Also, the battery device 2 is arranged adjacent in the Y direction to the fourth end portion 85 of the fixed base 80. The power conversion device 3 and the charging inlet 4 are arranged adjacent in the Y direction to the second end portion 83 of the fixed base 80. As described above, the battery device 2 and the seven relays 24, 25, 26, 33, 34, 53, and 54 are electrically connected by respective wirings. The connection of each wiring has been described above, so the description is omitted.

[0046] <Configuration of Relay> FIG. 6 is a schematic diagram of relays 24, 25, 26, 33, 34, 53, and 54. Relays 24, 25, 26, 33, 34, 53, and 54 are composed of an electromagnetic actuator 120, a relay body 140, a relay housing 190, etc. The reciprocating operation direction of the electromagnetic actuator 120 in relays 24, 25, 26, 33, 34, 53, and 54 corresponds to the axial direction of a rod 129 described later. The direction orthogonal to the axial direction may be referred to as the orthogonal direction. Note that the axial direction of the rod 129 can be equivalently expressed as the extending direction of the rod 129. The extending direction of the rod 129 may also be referred to as the longitudinal direction of the rod.

[0047] The electromagnetic actuator 120 is arranged side by side with the relay body 140 in the axial direction. For convenience, the side of the relay body 140 with respect to the electromagnetic actuator 120 is defined as the upward direction, and the side of the electromagnetic actuator 120 with respect to the relay body 140 is defined as the downward direction. The electromagnetic actuator 120 is mechanically connected to the relay body 140. The electromagnetic actuator 120 supplies a driving force for switching operation to the relay body 140.

[0048] The electromagnetic actuator 120 is composed of a fixed core 121, a movable core 126, a rod 129, an exciting coil 130, a coil housing 132, a return spring 133, a damper seat 135, a housing cylinder 136, etc.

[0049] The fixed core 121 is formed of a magnetic material such as iron. The fixed core 121 has a base portion 122 and a cylinder portion 123. The base portion 122 is formed in a thin plate shape with a small thickness in the axial direction. The fixed core 121 is arranged at a position facing the relay body 140 with the main surface of the base portion 122 along a plane along the orthogonal direction. A through hole communicating with a spring accommodation hole 123A described later is formed in the base portion 122.

[0050] The cylinder portion 123 is formed in a cylindrical shape. The cylinder portion 123 is integrally connected to the main surface of the base portion 122 on the side of the electromagnetic actuator 120. The cylinder portion 123 is provided with a spring accommodation hole 123A and a first opposing surface 124. The spring accommodation hole 123A is a hole in which the return spring 133 is accommodated. The spring accommodation hole 123A is formed by the inner peripheral wall surface of the cylinder portion 123. The spring accommodation hole 123A communicates with a through hole formed in the base portion 122. The diameter of the through hole is smaller than the diameter of the spring accommodation hole 123A. The first opposing surface 124 is formed by the lower end surface of the cylinder portion 123 facing downward.

[0051] The movable core 126 is formed in a cylindrical shape by a magnetic material such as iron. The outer diameter of the movable core 126 is substantially the same as or slightly smaller than the outer diameter of the cylinder portion 123. The movable core 126 is disposed coaxially with the cylinder portion 123 downward of the cylinder portion 123. The movable core 126 is provided with a rod holding hole 127 and a second opposing surface 128. The rod holding hole 127 is a hole for holding the rod 129. The rod holding hole 127 is formed by the inner peripheral wall surface of the movable core 126. The second opposing surface 128 is formed by the upper end surface of the movable core 126 facing upward. A gap is interposed between the second opposing surface 12 and the first opposing surface 124. The fixed core 121 and the movable core 126 face each other with the gap therebetween.

[0052] The rod 129 is formed in an elongated cylindrical shape by a non-magnetic metal material or the like. The rod 129 is inserted into the through hole of the fixed core 121 including the spring accommodation hole 123A. The lower portion of the rod 129 is fitted into the rod holding hole 127. The rod 129 reciprocates in the axial direction integrally with the movable core 126. The upper portion of the rod 129 passes through the spring accommodation hole 123A and protrudes upward from the base portion 122. The upper portion of the rod 129 is accommodated in the relay body 140.

[0053] The exciting coil 130 is formed by winding a thin wire material such as copper around a coil bobbin 131. The coil bobbin 131 is formed in a cylindrical or rectangular tube shape by a resin material. The exciting coil 130 is arranged so as to surround the outer peripheral sides of the cylinder part 123 and the movable core 126. The exciting coil 130 is energized according to a control signal output from a control device. When the exciting coil 130 is excited by energization, it generates a magnetic flux along the axial direction toward the inner peripheral side.

[0054] The coil housing 132 is formed in a bottomed container shape from a magnetic material such as ferromagnetic stainless steel. The coil housing 132 is arranged downward of the base part 122. The upper edge of the coil housing 132 is in contact with the outer edge of the base part 122. The exciting coil 130 is housed inside the coil housing 132.

[0055] The return spring 133 is formed by spirally winding a metal wire. The return spring 133 is arranged on the outer periphery of the rod 129. The return spring 133 is housed in the spring housing hole 123A in a state of being axially compressed between the cylinder part 123 and the movable core 126. The return spring 133 biases the movable core 126 axially in a direction away from the cylinder part 123 by a restoring force.

[0056] The damper seat 135 is formed in a thin disk shape from a rubber material, a resin material, or the like. The damper seat 135 is arranged downward of the movable core 126. The damper seat 135 contacts the lower end surface of the movable core 126 facing downward and restricts the movement of the movable core 126 in a direction away from the cylinder part 123.

[0057] The housing cylinder 136 is described as a bottomed cylinder made of a metal material. The housing cylinder 136 houses the movable core 126 and the damper seat 135. The upper edge of the peripheral wall of the housing cylinder 136 is externally fitted to the outer peripheral wall surface of the cylinder portion 123. The inner peripheral wall surface of the housing cylinder 36 slidably supports the outer peripheral wall surface of the movable core 126. The movable core 126 is reciprocally displaceable along the axial direction within the housing cylinder 136.

[0058] In the above electromagnetic actuator 120, a magnetic circuit is formed. The magnetic circuit is formed by the fixed core 121, the movable core 126, the coil housing 132, and the housing cylinder 136 so as to surround the excitation coil 130. When the excitation coil 130 is energized and magnetic flux is generated in the magnetic circuit, the movable core 126 is attracted to the fixed core 121 by the magnetic force and moves upward so as to reduce the gap between the fixed core 121 and the movable core 126. When the energization of the excitation coil 130 is stopped and the magnetic flux generated in the magnetic circuit disappears, the movable core 126 moves downward by the biasing force of the return spring 133.

[0059] The relay body 140 is composed of a pressing spring 145, a pressing plate 146, a spring holder 147, an armature stopper 148, a sealed case 150, a fixed terminal 160, a movable terminal 170, etc. The pressing spring 145, the pressing plate 146, the spring holder 147, the movable terminal 170, and the armature stopper 148 are attached to the upper portion of the rod 129 protruding from the electromagnetic actuator 120.

[0060] The pressing spring 145 is formed by spirally winding a metal wire. The pressing spring 145 is disposed on the outer peripheral side of the rod 129. The pressing spring 145 is disposed between the pressing plate 146 and the spring holder 147. The pressing spring 145 is compressed between the pressing plate 146 and the spring holder 147 by the upward displacement of the rod 129. The restoring force of the pressing spring 145 becomes a biasing force for pressing the movable terminal 170 against the fixed terminal 160.

[0061] The pressing plate 146 is formed in a plate shape from a metal material or the like. The pressing plate 146 is disposed between the pressing spring 145 and the movable terminal 170. The pressing plate 146 is displaceable in the vertical direction with respect to the rod 129. The pressing plate 146 transmits the upward driving force of the electromagnetic actuator 120 and the upward biasing force of the pressing spring 145 to the movable terminal 170.

[0062] The spring holder 147 is formed in a flat-bottomed cylindrical shape from a metal material or the like. The spring holder 147 is externally fitted onto the rod 129 and held by the rod 129. The spring holder 147 reciprocates in the axial direction integrally with the rod 129. The spring holder 147 houses the downward end portion of the pressing spring 145. The spring holder 147 compresses the pressing spring 145 in the axial direction due to the upward displacement of the rod 129.

[0063] The mover stopper 148 is formed in a cylindrical shape with a flange from a metal material or a hard resin material. The flange portion of the mover stopper 148 is located above the movable terminal 170. The mover stopper 148 reciprocates in the axial direction integrally with the rod 129. The mover stopper 148 contacts the movable terminal 170 due to the downward (return direction) displacement of the rod 129 and pushes the movable terminal 170 downward.

[0064] The sealed case 150 is formed from a ceramic material. The sealed case 150 has a bottomed container shape. The sealed case 150 is disposed above the electromagnetic actuator 120 with its opening facing downward. The sealed case 150 has an upper wall 151, four side walls 152, and a rod stopper 157.

[0065] The upper wall 151 is formed in a plate shape having a thickness in the axial direction. Two terminal accommodation holes 154 and 155 are formed in the upper wall 151. The terminal accommodation holes 154 and 155 are through holes that penetrate the upper wall 151 in the plate thickness direction. The terminal accommodation holes 154 and 55 are formed at intervals in the orthogonal direction. The terminal accommodation holes 154 and 155 are circular openings.

[0066] The rod stopper 157 is formed in a plate shape from a metal material or a hard resin material. The rod stopper 157 is held by the relay housing 190 or the like. The rod stopper 157 is located above the upper end 129A of the rod 129 and faces the upper end 129A in the axial direction. The rod stopper 157 restricts the upward movement of the rod 129 by contacting the upper end 129A. The relay housing 190 is a case body that houses the electromagnetic actuator 120 and the relay main body 140. The relay housing 190 is formed in a box shape as a whole from a resin material or the like.

[0067] The fixed terminal 160 is formed from a metal material having excellent conductivity such as copper. The fixed terminal 160 is electrically connected to the current path formed in the power control circuit 70. The fixed terminal 160 is provided with a connection hole 165 and a fixed contact 167. The connection hole 165 is formed in a cylindrical hole shape. The connection hole 165 is used to fix a conductive member such as a bus bar that forms a current path to the fixed terminal 160. The fixed contact 167 is formed on the bottom wall surface of the fixed terminal 160 facing downward. The fixed contact 167 faces the movable terminal 170 in the axial direction. The fixed contact 167 contacts the movable terminal 170 displaced upward.

[0068] The fixed terminal 160 includes a first fixed terminal 161 and a second fixed terminal 162. The two fixed terminals 161 and 162 are respectively accommodated in the terminal accommodation holes 154 and 155 and are arranged side by side at intervals in the orthogonal direction. As described above, a bus bar or the like that forms a current path is fixed to the fixed terminal 160. The bus bar or the like is held by each of the fixed terminals 161 and 162 by a fastening member such as a screw that screws into the connection hole 165.

[0069] The movable terminal 170 is formed in a plate shape having a thickness in the axial direction from a metal material excellent in conductivity such as copper. The movable terminal 170 is provided with a rod insertion hole 174. The rod insertion hole 174 is a through hole penetrating the movable terminal 170 in the plate thickness direction. A rod 129 is inserted into the rod insertion hole 174. The movable terminal 170 is attached to the rod 129 with its main surface along a plane along the orthogonal direction. Note that the movable terminal 170 is allowed to displace in the vertical direction between the pressing plate 146 and the mover stopper 148.

[0070] The movable terminal 170 is pressed against both the first fixed terminal 161 and the second fixed terminal 162 substantially evenly by the biasing force of the pressing spring 145. The movable terminal 170 has a first movable contact 171 and a second movable contact 172.

[0071] The first movable contact 171 is formed in a region of the upper surface of the movable terminal 170 facing upward and facing the bottom wall surface of the first fixed terminal 161. The first movable contact 171 contacts the fixed contact 167 of the first fixed terminal 161 due to the upward displacement of the first movable contact 171. The first movable contact 171 becomes a closed state, that is, an on state, with respect to the first fixed terminal 161. The first movable contact 171 separates from the fixed contact 167 of the first fixed terminal 161 due to the downward displacement of the movable terminal 170. The first movable contact 171 becomes an open state, that is, an off state, with respect to the first fixed terminal 161.

[0072] Similarly, the second movable contact 172 is formed in a region of the upper surface of the movable terminal 170 facing upward and facing the bottom wall surface of the second fixed terminal 162. The second movable contact 172 contacts the fixed contact 167 of the second fixed terminal 162 due to the upward displacement of the movable terminal 170. The second movable contact 172 becomes a closed state, that is, an on state, with respect to the second fixed terminal 162. The second movable contact 172 separates from the fixed contact 167 of the second fixed terminal 162 due to the downward displacement of the second movable contact 172. The second movable contact 172 becomes an open state, that is, an off state, with respect to the second fixed terminal 162.

[0073] <DC Relay and Parallel Relays> Fig. 7 shows a schematic diagram in which the series relay 26, parallel relays 53 and 54, and a part of the fixed base 80 are extracted from the high voltage J / B10. In Fig. 7, the rod 129, compression spring 145, fixed terminal 160, and movable terminal 170 are further extracted from the series relay 26 and the parallel relays 53 and 54 for illustration. Note that these components are schematically shown in Fig. 7. In the series relay 26 and the parallel relays 53 and 54, the illustration of other components is omitted. The outer shapes of the series relay 26 and the parallel relays 53 and 54 are shown by a two-dot chain line.

[0074] The series relay 26 has a rod 129S, a compression spring 145S, a fixed terminal 160S, and a movable terminal 170S. The negative-side parallel relay 53 has a rod 129N, a compression spring 145N, a fixed terminal 160N, and a movable terminal 170N. The positive-side parallel relay 54 has a rod 129P, a compression spring 145P, a fixed terminal 160P, and a movable terminal 170P. The components with the symbol "S" attached are the components of the series relay 26. The components with the symbol "N" attached are the components of the negative-side parallel relay 53. The components with the symbol "P" attached are the components of the positive-side parallel relay 54.

[0075] The fixed terminals 160S, 160N, and 160P may be referred to as connection fixed terminals. The rod 129P may be referred to as the first parallel rod. The rod 129N may be referred to as the second parallel rod. The rod 129S may be referred to as the series rod. The movable terminal 170S may be referred to as the series movable terminal. The fixed terminal 160S may be referred to as the series fixed terminal. The rods 129N and 129P may be referred to as parallel rods. The movable terminals 170N and 170P may be referred to as parallel movable terminals. The fixed terminals 160N and 160P may be referred to as parallel fixed terminals.

[0076] The fixed terminal 160S is electrically and mechanically connected to a bus bar or the like forming the third connection piece 23. The third connection piece 23 has a connection piece 23A connected to the first battery 2A and a connection piece 23B connected to the second battery 2B. The first fixed terminal 161S of the fixed terminal 160S is connected to the first battery 2A via the connection piece 23A. The second fixed terminal 162S of the fixed terminal 160S is connected to the second battery 2B via the connection piece 23B.

[0077] The fixed terminal 160N is electrically and mechanically connected to a bus bar or the like forming the negative electrode side third wiring 52. The negative electrode side third wiring 52 has a connection piece 52A connected to the first battery 2A and a connection piece 52B connected to the second battery 2B. The first fixed terminal 161N of the fixed terminal 160N is connected to the first battery 2A via the connection piece 52A. The second fixed terminal 162N of the fixed terminal 160N is connected to the second battery 2B via the connection piece 52B.

[0078] The fixed terminal 160P is electrically and mechanically connected to a bus bar or the like forming the positive electrode side third wiring 51. The positive electrode side third wiring 51 has a connection piece 51A connected to the first battery 2A and a connection piece 51B connected to the second battery 2B. The first fixed terminal 161P of the fixed terminal 160P is connected to the first battery 2A via the connection piece 51A. The second fixed terminal 162P of the fixed terminal 160P is connected to the second battery 2B via the connection piece 51B.

[0079] In the first embodiment, the axial direction of the rod 129S of the series relay 26 is different from the axial directions of the parallel relays 53 and 54. As an example, the axial directions of the rods 129N and 129P are the same. As an example, the axial directions of the rods 129N and 129P coincide in the Y direction. The axial direction of the rod 129S does not coincide in the Y direction. FIG. 7 shows a configuration in which an oblique direction having an X-direction component and a Y-direction component in the axial direction of the rod 129S is adopted as an example.

[0080] <Advantages and effects> The movable terminal 170 moves axially along the rod 129. When the movable terminal 170 moves upward, it contacts the fixed terminal 160. When the movable terminal 170 contacts the fixed terminal 160, the movable contacts 171, 172 and the fixed contact 167 are in a closed state, that is, an on state. When the movable terminal 170 moves downward, it separates from the fixed terminal 160. When the movable terminal 170 separates from the fixed terminal 160, the movable contacts 171, 172 and the fixed contact 167 are in an open state, that is, an off state. In the first embodiment, as described above, the axial direction of the rod 129S of the series relay 26 is different from the axial directions of the rods 129N, 129P of the parallel relays 53, 54.

[0081] As an example, when vibration occurs along the axial direction of the rod 129S, the movable terminal 170S may be displaced up and down. The movable terminal 170S may unintentionally contact the fixed terminal 160N due to vibration. In contrast, the movable terminals 170N, 170P are passed through the rods 129N, 129P having axial directions different from that of the rod 129S. Even if the movable terminals 170N, 170P attempt to be displaced up and down along the axial direction of the rod 129S, the displacement is suppressed by the rods 129N, 129P. According to this, it is suppressed that the movable terminals 170N, 170P contact the fixed terminals 160N, 160P.

[0082] Similarly, when vibration occurs along the axial directions of the rods 129N, 129P, the movable terminals 170N, 170P may unintentionally contact the fixed terminals 160N, 160P due to vibration. In contrast, the movable terminal 170S is passed through the rod 129S having an axial direction different from that of the rods 129N, 129P. Even if the movable terminal 170S attempts to be displaced up and down along the axial directions of the rods 129N, 129P, the displacement is suppressed by the rod 129S. According to this, it is suppressed that the movable terminal 170S contacts the fixed terminal 160S.

[0083] That is, the simultaneous turning-on of the series relay 26 and the parallel relays 53 and 54 is suppressed. In any state during 800V driving, 800V charging, and 400V charging, the simultaneous turning-on of the series relay 26 and the parallel relays 53 and 54 is suppressed. It is possible to suppress the unintended change of the current path of each mode due to large vibrations. The short-circuiting of the current path including the series relay 26 and the negative-side parallel relay 53 is suppressed. The short-circuiting of the current path including the series relay 26 and the positive-side parallel relay 54 is suppressed.

[0084] (Second Embodiment) FIG. 8 shows a schematic diagram of extracting a part of the high-voltage J / B 10, the series relay 26, the parallel relays 53 and 54, and the fixed base 80 in the second embodiment. In the second embodiment, the axial direction of the rod 129S, the axial direction of the rod 129N, and the axial direction of the rod 129P are different. As an example, the axial direction of the rod 129N coincides with the Y direction. The axial directions of the rod 129S and the rod 129P do not coincide with the Y direction. Further, the axial directions of the rod 129S and the rod 129P are different from each other. The axial direction of the rod 129S may be along any direction as long as it does not coincide with the Y direction. As an example, the axial directions of the rod 129S and the rod 129P are oblique directions having X-direction components and Y-direction components. For example, the oblique directions may be individually defined so that the axial directions of the rod 129S and the rod 129P are symmetric.

[0085] According to this, in addition to the effects of the first embodiment, it is suppressed that the negative-side parallel relay 53 and the positive-side parallel relay 54 are simultaneously turned on. When the negative-side parallel relay 53 and the positive-side parallel relay 54 are simultaneously turned on, a closed loop is formed in the current path including the negative-side parallel relay 53 and the positive-side parallel relay 54. When the voltage of the negative-side parallel relay 53 and the voltage of the positive-side parallel relay 54 are different, there is a possibility that a weak current may flow in the current path including the negative-side parallel relay 53 and the positive-side parallel relay 54. In the second embodiment, it is suppressed that the negative-side parallel relay 53 and the positive-side parallel relay 54 are simultaneously turned on. Therefore, when the voltage of the negative-side parallel relay 53 and the voltage of the positive-side parallel relay 54 are different, it is suppressed that a weak current flows in the electrical wiring including the negative-side parallel relay 53 and the positive-side parallel relay 54.

[0086] (Third Embodiment) FIG. 9 shows a schematic diagram in which a part of the high voltage J / B10, the series relay 26, the parallel relays 53 and 54, and the fixed base 80 is extracted in the third embodiment. In the third embodiment, the axial directions of two of the three rods 129S, 129N, and 129P are the same. The direction in which one movable terminal 170 in the rod 129 with the same axial direction approaches the fixed terminal 160 is different from the direction in which the other movable terminal 170 in the rod 129 with the same axial direction approaches the fixed terminal 160. The direction in which one movable terminal 170 approaches the fixed terminal 160 is opposite to the direction in which the other movable terminal 170 approaches the fixed terminal 160.

[0087] As an example of the third embodiment, the axial direction of the rod 129S and the axial direction of the rod 129P are the same. In the same axial direction, the direction in which the movable terminal 170S approaches the fixed terminal 160S is different from the direction in which the movable terminal 170P approaches the fixed terminal 160P. The direction in which the movable terminal 170S approaches the fixed terminal 160S is opposite to the direction in which the movable terminal 170P approaches the fixed terminal 160P. Also, the axial directions of the rods 129S and 129P are different from the axial direction of the rod 129N.

[0088] Specifically regarding an example of the third embodiment shown in FIG. 9, the axial direction of the rod 129S and the axial direction of the rod 129P coincide in the X direction. The axial direction of the rod 129N is different from the axial direction of the rod 129S and the axial direction of the rod 129P. The axial direction of the rod 129N coincides in the Y direction. According to this, when vibration occurs in the direction in which the movable terminal 170S approaches the fixed terminal 160S in the X direction, the following is likely to occur. The movable terminal 170S is likely to come into contact with the fixed terminal 160S, and the movable terminal 170P is likely to move away from the fixed terminal 160S. Even if vibration is applied to the high voltage J / B10 in a specific direction in the X direction, it is suppressed that the relays 26 and 54 with different orientations become simultaneously on state.

[0089] Generally in a vehicle, there is a possibility that an impact from one direction such as a rear-end collision or a frontal collision, an impact from one direction such as a side collision, or a large impact from one direction such as getting on may be applied. By applying the high voltage J / B10 of the third embodiment to the vehicle, it is possible to preferably suppress that the two relays 26, 54, and 55 arranged in the same axial direction and different directions become simultaneously on state against an impact from one direction.

[0090] As a preferred example, in the third embodiment, the axial direction of the rod 129S coincides with any one of the front-rear direction, the left-right direction, and the up-down direction of the vehicle. In that case, the movable terminal 170S is displaceable only with respect to an impact along this direction. The axial directions of the rods 129N and 129P coincide with one different from the axial direction of the rod 129S among any one of the front-rear direction, the left-right direction, and the up-down direction of the vehicle. Each of the movable terminals 170N and 170P is displaceable only with respect to an impact along this direction. According to this, the displacement of the movable terminals 170S, 170N, and 170P can be effectively suppressed.

[0091] Thus, in the third embodiment, when an impact is applied from one direction in the axial direction, it is expected that the two coaxial relays will not turn on simultaneously. However, the pressing spring 145 has spring properties. Therefore, the movable terminal 170 of the relay that is expected to be in the off state among the two relays may unintentionally turn on due to the biasing force of the pressing spring 145. In that case, there is a risk that the two relays will turn on simultaneously unintentionally.

[0092] As another example, the axial directions of the rod 129S and the rod 129N may be the same. In that case, in the coaxial direction, the direction in which the movable terminal 170S approaches the fixed terminal 160S is different from the direction in which the movable terminal 170N approaches the fixed terminal 160N. The direction in which the movable terminal 170S approaches the fixed terminal 160S is opposite to the direction in which the movable terminal 170N approaches the fixed terminal 160N.

[0093] As yet another example, the axial directions of the rod 129N and the rod 129P may be the same. In that case, in the coaxial direction, the direction in which the movable terminal 170N approaches the fixed terminal 160N is different from the direction in which the movable terminal 170P approaches the fixed terminal 160P. The direction in which the movable terminal 170N approaches the fixed terminal 160N is opposite to the direction in which the movable terminal 170P approaches the fixed terminal 160P. In these cases as well, the same effects as described above are achieved.

[0094] (Fourth Embodiment) FIG. 10 shows a schematic diagram in which a part of the high voltage J / B10, the series relay 26, the parallel relays 53 and 54, and the fixed base 80 are extracted in the fourth embodiment. In the fourth embodiment, the axial direction of the rod 129S, the axial direction of the rod 129N, and the axial direction of the rod 129P are orthogonal to each other. As an example of the fourth embodiment, the axial direction of the rod 129S coincides with the Y direction. The axial direction of the rod 129S coincides with the X direction. The axial direction of the rod 129P coincides with the Z direction.

[0095] When the high-voltage J / B 10 of the fourth embodiment is applied to a vehicle, the axial directions of the rods 129S, 129N, and 129P respectively correspond to the front-rear direction, the left-right direction, and the up-down direction. According to this, even if vibration occurs in any direction, it is suppressed that the series relay 26, the negative-side parallel relay 53, and the positive-side parallel relay 54 are simultaneously turned on. Also, even if an impact is applied along any axial direction, it is suppressed that two relays are simultaneously turned on.

[0096] Although this disclosure has been described in accordance with the embodiments, it is understood that this disclosure is not limited to the embodiments and structures. This disclosure also includes various modifications and variations within the equivalent scope. In addition, although various combinations and forms are shown in this disclosure, other combinations and forms including only one element, more than one element, or less than one element thereof are also within the scope and spirit of this disclosure.

[0097] (Disclosure of Technical Ideas) This specification discloses a plurality of technical ideas described in a plurality of items listed below. Some items may be described in a multiple dependent form in which a preceding item is alternatively cited in subsequent items. Some items may be described in a multiple dependent form that refers to other multiple dependent form items. The items described in these multiple dependent forms define a plurality of technical ideas. (Technical Idea 1) A device module (10) that switches between series connection and parallel connection of a first battery (2A) and a second battery (2B), A series relay (26) that serially connects the first battery and the second battery, Parallel relays (53, 54) that connect the first battery and the second battery in parallel, and The series relay and the parallel relays have connection fixed terminals (160S, 160N, 160P) that are electrically connected to different current paths. The series relay includes a series fixed terminal (160S) which is the connection fixed terminal of the series relay, a series movable terminal (170S) that contacts and separates from the series fixed terminal, and a series rod (129S) passed through the series movable terminal to guide the movement of the series movable terminal. The parallel relay includes parallel fixed terminals (160N, 160P) which are the connection fixed terminals of the parallel relay, parallel movable terminals (170N, 170P) that contact and separate from the parallel fixed terminals, and parallel rods (129N, 129P) passed through the parallel movable terminals to guide the movement of the parallel movable terminals. A device module in which the extending direction of the series rod is different from the extending direction of the parallel rod.

[0098] (Technical idea 2) The parallel relay includes a first parallel relay (54) provided on the wiring connecting the positive electrodes of the first battery and the second battery, and a second parallel relay (53) provided on the wiring connecting the negative electrodes of the first battery and the second battery. The first parallel relay includes a first parallel rod (129P) which is the parallel rod. The device module according to Technical idea 1, wherein the second parallel relay includes a second parallel rod (129N) which is the parallel rod.

[0099] (Technical idea 3) The device module according to Technical idea 2, wherein the extending direction of the series rod, the extending direction of the first parallel rod, and the extending direction of the second parallel rod are different from each other.

[0100] (Technical idea 4) The device module according to Technical idea 2 or 3, wherein the direction in which the series movable terminal approaches the series fixed terminal, the direction in which the parallel movable terminal of the first parallel relay approaches the parallel fixed terminal of the first parallel relay, and the direction in which the parallel movable terminal of the second parallel relay approaches the parallel fixed terminal of the second parallel relay are different from each other.

[0101] (Technical idea 5) The device module according to Technical Idea 2 or 3, wherein the extending direction of the serial rod, the extending direction of the first parallel rod, and the extending direction of the second parallel rod are orthogonal to each other in three different directions.

[0102] (Technical idea 6) Mounted on a vehicle The device module according to Technical Idea 5, wherein the three directions correspond to the longitudinal direction of the vehicle, the lateral direction of the vehicle, and the vertical direction of the vehicle.

[0103] (Technical idea 7) The device module according to any one of Technical Ideas 1 to 6, wherein the parallel fixed terminals are electrically connected to wirings (53, 54) to which electric power for charging the first battery or the second battery is supplied.

Explanation of reference numerals

[0104] 10 High-voltage J / B, 129N, 129P, 129S rods, 160N, 160P, 160S fixed terminals, 170N, 170P, 170S movable terminals, 26 Serial relay, 2A First battery, 2B Second battery, 51 Positive-side third wiring, 52 Negative-side third wiring, 53 First parallel relay, 53 Negative-side parallel relay, 54 Positive-side parallel relay

Claims

1. A device module (10) that switches between series connection and parallel connection of a first battery (2A) and a second battery (2B), a series relay (26) that serially connects the first battery and the second battery, and parallel relays (53, 54) that parallel-connect the first battery and the second battery, and the series relay and the parallel relays have connection fixed terminals (160S, 160N, 160P) that are electrically connected to different current paths, the series relay has a series fixed terminal (160S) that is the connection fixed terminal of the series relay, a series movable terminal (170S) that contacts and separates from the series fixed terminal, and a series rod (129S) that is passed through the series movable terminal to guide the movement of the series movable terminal, the parallel relays have parallel fixed terminals (160N, 160P) that are the connection fixed terminals of the parallel relays, parallel movable terminals (170N, 170P) that contact and separate from the parallel fixed terminals, and parallel rods (129N, 129P) that are passed through the parallel movable terminals to guide the movement of the parallel movable terminals, and a device module in which the extending direction of the series rod is different from the extending direction of the parallel rods.

2. The parallel relays include a first parallel relay (54) provided in a wiring that connects the positive electrodes of the first battery and the second battery, and a second parallel relay (53) provided in a wiring that connects the negative electrodes of the first battery and the second battery, the first parallel relay has a first parallel rod (129P) that is the parallel rod, and the device module according to claim 1, wherein the second parallel relay has a second parallel rod (129N) that is the parallel rod.

3. The device module according to claim 2, wherein the extending direction of the series rod, the extending direction of the first parallel rod, and the extending direction of the second parallel rod are different.

4. The device module according to claim 2 or 3, wherein the direction in which the series movable terminal approaches the series fixed terminal, the direction in which the parallel movable terminal of the first parallel relay approaches the parallel fixed terminal of the first parallel relay, and the direction in which the parallel movable terminal of the second parallel relay approaches the parallel fixed terminal of the second parallel relay are different.

5. The device module according to claim 2 or 3, wherein the extending direction of the serial rod, the extending direction of the first parallel rod, and the extending direction of the second parallel rod are orthogonal to each other in three different directions.

6. Mounted on a vehicle The device module according to claim 5, wherein the three directions correspond to the front-rear direction of the vehicle, the left-right direction of the vehicle, and the up-down direction of the vehicle.

7. The device module according to any one of claims 1 to 3, wherein the parallel fixed terminals are electrically connected to wirings (51, 52) to which power for charging the first battery or the second battery is supplied.

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