Device module and power storage device

Abstract

A high voltage J / B (10) electrically connects a power supply device (2) including a first battery (2A) and a second battery (2B) to an external charger (6). A device module comprises first switches (33, 34) and electrical devices (24, 25, 53, 54, 90). The first switches include a positive electrode-side first switch (33) connected to the power supply device and the positive electrode of the external charger, and a negative electrode-side first switch (34) connected to the power supply device and the negative electrode of the external charger. The electrical devices are in a non-energized state when the positive electrode-side first switch and the negative electrode-side first switch are in an energized state. The electrical devices are arranged between the first positive electrode-side first switch and the negative electrode-side first switch in an alignment direction (X) in which the positive electrode-side first switch and the negative electrode-side first switch are aligned.

Description

Equipment module and power storage device CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application is based on Patent Application No. 2023-196230 filed in Japan on November 17, 2023, Patent Application No. 2024-172790 filed in Japan on October 1, 2024, and Patent Application No. 2024-191065 filed in Japan on October 30, 2024, and the contents of the basic applications are incorporated by reference in their entirety.

[0002] The disclosure provided herein relates to an equipment module and a power storage device.

[0003] Patent Document 1 describes a vehicle including a power storage device, a main relay device, a charging relay device, and an inlet. The vehicle is configured to be able to charge the power storage device with power from an external power source via the inlet. The main relay device includes two system main relays. The charging relay device includes two charging relays. When the two charging relays and the two system main relays are on, a current path connecting the power storage device and the inlet is connected, allowing power to be supplied from the inlet to the power storage device.

[0004] Patent No. 6992540

[0005] When power is supplied from the inlet to the power storage device, both charging relays are energized. In the energized state, the two charging relays generate heat, which may cause thermal and magnetic interference between the two.

[0006] An object of the present disclosure is to provide an equipment module in which thermal and magnetic interference between a positive-side first switch and a negative-side first switch is suppressed.An object of the present disclosure is to provide an electric storage device in which the configuration of the equipment module is simplified.

[0007] An equipment module according to one aspect of the present disclosure is an equipment module that electrically connects a power supply device including a first battery and a second battery to an external charger, and includes a first switch that controls the flow of electricity between the power supply device and the external charger, the first switch including a positive side switch connected to the positive pole of the power supply device and the external charger, and a negative side switch connected to the negative pole of the power supply device and the external charger, and an electrical device that is in a non-conductive state when the positive side first switch and the negative side first switch are in a conductive state, and the electrical device is arranged between the positive side first switch and the negative side first switch in the arrangement direction of the positive side first switch and the negative side first switch.

[0008] This suppresses thermal and magnetic interference between the positive side first switch and the negative side first switch.

[0009] An energy storage device according to one aspect of the present disclosure is an energy storage device including a power supply device including a first battery and a second battery, and an equipment module electrically connected to the power supply device and a load, wherein the equipment module has at least a pair of system main relays electrically connecting the power supply device and the load, a first semiconductor parallel relay electrically connected to an electric wire connecting the positive electrodes of the first battery and the second battery, a second semiconductor parallel relay electrically connected to an electric wire connecting the negative electrodes of the first battery and the second battery, and a series relay electrically connected to one positive electrode of the first battery and the other negative electrode of the second battery, wherein the output voltage can be changed by connecting the first battery and the second battery in series or parallel, and the first battery and the second battery are arranged so that the positive electrode side of one of the first battery and the negative electrode side of the other of the first battery and the second battery are adjacent to each other.

[0010] This simplifies the configuration of the device module.

[0011] The reference numbers in parentheses above merely indicate the corresponding relationship with the configurations described in the embodiments below, and do not in any way limit the technical scope.

[0012] 19 is a circuit diagram for explaining a power supply system. 20 is a schematic diagram for explaining a power supply system. 21 is a circuit diagram for explaining a current path during driving. 22 is a circuit diagram for explaining a current path during charging. 23 is a circuit diagram for explaining a current path during charging. 24 is a top view of an instrument module. 25 is a top view of an instrument module in a second embodiment. 26 is a top view of another instrument module in the second embodiment. 27 is a top view of an instrument module in a third embodiment. 28 is a top view of an instrument module in a fourth embodiment. 29 is a top view of an instrument module in a fifth embodiment. 20 is a top view of an instrument module in a sixth embodiment. 21 is a top view of an instrument module in a seventh embodiment. 22 is a perspective view of an instrument module in an eighth embodiment. 23 is a plan view of an instrument module. 24 is a partial plan view of an instrument module. 25 is a partial plan view of an instrument module. 26 is a plan view of an instrument module. 27 is a cross-sectional view taken along line XX-XX in FIG. 19. 28 is a cross-sectional view taken along line XXI-XX in FIG. 19. 29 is a layout diagram of an instrument module, a power conversion device, and a battery device. 29 is a circuit diagram of an instrument module, a power conversion device, and a battery device. 29 is a plan view of an instrument module of Comparative Example 1. 31 is a layout diagram of an equipment module, a power conversion device, and a battery device according to Modification 1. FIG. 32 is a cross-sectional view of an equipment module according to Modification 2. FIG. 33 is a plan view of an equipment module according to Modification 3. FIG. 34 is a perspective view of an equipment module according to Modification 4. FIG. 35 is a cross-sectional view taken along line XXX-XXX in FIG. 29. FIG. 36 is a plan view of an equipment module according to Comparative Example 2. FIG. 37 is a cross-sectional view taken along line XXXII-XXXII in FIG. 31.

[0013] Hereinafter, several embodiments for carrying out the present disclosure will be described with reference to the drawings. In each embodiment, parts corresponding to matters described in the preceding embodiment will be assigned the same reference numerals, and duplicated explanations may be omitted. In each embodiment, when only a part of the configuration is described, the other previously described embodiments may be applied to the other parts of the configuration.

[0014] In addition, it is not only possible to combine parts that are explicitly stated as being possible in each embodiment, but it is also possible to partially combine embodiments, embodiments and variants, and variants even if not explicitly stated, as long as there are no particular problems with the combination.

[0015] (First embodiment) A high-voltage junction box (hereinafter referred to as high-voltage J / B) 10 according to the first embodiment shown in Figures 1 and 2 is used in an electric vehicle such as a BEV (Battery Electric Vehicle). The high-voltage J / B 10 is mounted on the electric vehicle together with a battery device 2, a power conversion device 3, a charging inlet 4, etc. The high-voltage J / B 10 is electrically connected to the battery device 2, the power conversion device 3, the charging inlet 4, etc. The high-voltage J / B 10 is sometimes referred to as an equipment module. The battery device 2 is sometimes referred to as a power supply device.

[0016] The battery device 2 has a first battery 2A and a second battery 2B. The first battery 2A and the second battery 2B each include a plurality of battery cells. These battery cells are, for example, secondary batteries such as lithium batteries. The first battery 2A and the second battery 2B are configured by electrically connecting a plurality of battery cells in series. The first battery 2A may be referred to as the first battery. The second battery 2B may be referred to as the second battery.

[0017] In this embodiment, the first battery 2A and the second battery 2B include the same number of battery cells. The first battery 2A and the second battery 2B output a power supply of approximately 400 V. The power supply power is sometimes referred to as output power. The first battery 2A or the second battery 2B individually outputs a power supply of approximately 400 V. Alternatively, the first battery 2A and the second battery 2B output a combined power supply of approximately 800 V. When the first battery 2A and the second battery 2B are connected in series, the rated voltage of the battery device 2 is 800 V. When the first battery 2A and the second battery 2B are connected in parallel, the rated voltage of the battery device 2 is 400 V.

[0018] Such switching of the power supply output is performed by the high voltage J / B 10. The high voltage J / B 10 may be referred to as a power distribution device. By switching the power supply output by the high voltage J / B 10, power supply of approximately 400 V or approximately 800 V is supplied to the power conversion device 3.

[0019] 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 into AC power. This AC power is supplied to the motor generator. The motor generator runs using this AC power. The running wheels of the electric vehicle rotate autonomously through power running. The motor generator also converts the kinetic energy of the running wheels into electrical energy. The motor generator regenerates electricity. The AC power generated by regeneration 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 / B 10.

[0020] A charging cable from a charging stand 6 provided outside the vehicle is connected to the charging inlet 4. DC power for charging the battery 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 / B 10. The charging stand 6 is provided in a charging facility or the like. Charging from the charging stand 6 to the battery 2 is performed via the charging inlet 4. The charging stand 6 corresponds to an external charger. The charging stand 6 includes a normal charger and a rapid charger.

[0021] An example of a normal charger includes a single-phase AC power supply with a voltage of 200V or 100V, and is configured to supply AC power with an output of approximately 3kW (voltage 200V, maximum current 15A). An example of a quick charger is configured to supply DC power with a maximum output of 160kW (maximum voltage 400V, maximum current 400A). This quick charger is sometimes referred to as a low-voltage quick charger. Another example of a quick charger is configured to supply DC power with a maximum output of 160kW (maximum voltage 800V, maximum current 200A). This quick charger is sometimes referred to as a high-voltage quick charger.

[0022] Rapid charging is a charging method that aims to charge the battery 2 in a short time by passing a large current through the battery 2. Rapid charging uses a direct current to charge the battery 2. Charging in this embodiment can also be called DC (Direct Current) charging. Note that the 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 of the battery 2 from the charging stand 6 is performed using a rapid charger.

[0023] The high-voltage J / B 10 includes a power control circuit 70 and a fixing base 80 to which the power control circuit 70 is fixed. The power control circuit 70 includes a plurality of current paths. The power control circuit 70 switches between 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 copper plate members such as bus bars.

[0024] The first wiring 20 is a power line that connects the first battery 2A and the second battery 2B in series 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 side of the power conversion device 3 to the positive electrode of the first battery 2A. The second connection piece 22 connects the negative electrode side of the power conversion device 3 to the negative electrode of the second battery 2B. The third connection piece 23 connects the negative electrode of the first battery 2A to the positive electrode of the second battery 2B.

[0025] 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-side second wiring 31 and a negative-side second wiring 32. The positive-side second wiring 31 connects the first connection piece 21 to the positive side of the charging inlet 4. The negative-side second wiring 32 connects the second connection piece 22 to the negative side of the charging inlet 4. The charging inlet 4 has a positive-side charging inlet 4A that connects to the positive electrode of the charging stand 6 and a negative-side charging inlet 4B that connects to the negative electrode of the charging stand 6. The first connection piece 21 and the positive-side second wiring 31 are electrically connected at a first connection portion 41. The third connection piece 23 and the negative-side second wiring 32 are electrically connected at a second connection portion 42.

[0026] 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-side third wiring 51 and a negative-side third wiring 52. The positive-side third wiring 51 connects the third connection piece 23 and the first connection portion 41. The negative-side third wiring 52 connects the third connection piece 23 and the second connection portion 42.

[0027] In addition to the wiring 20, 30, and 50, the power control circuit 70 also has seven relays 24, 25, 26, 33, 34, 53, and 54. The seven relays 24, 25, 26, 33, 34, 53, and 54 are system main relays 24 and 25, switching relays 26, 53, and 54, and charging relays 33 and 34. The system main relays 24 and 25 have a positive-side system main relay 24 and a negative-side system main relay 25. The switching relays 26, 53, and 54 have a first switching relay 26 and a second switching relay 53 and 54. The second switching relays 53 and 54 have a positive-side second switching relay 54 and a negative-side second switching relay 53. The charging relays 33 and 34 have a positive-side charging relay 33 and a negative-side charging relay 34.

[0028] The positive side system main relay 24 may be referred to as the positive side third switch. The negative side system main relay 25 may be referred to as the negative side third switch. The positive side system main relay 24 and the negative side system main relay 25 may be collectively referred to as the third switch. The first changeover relay 26 may be referred to as the second switch. The positive side charging relay 33 may be referred to as the positive side first switch. The negative side charging relay 34 may be referred to as the negative side first switch. The positive side charging relay 33 and the negative side charging relay 34 may be collectively referred to as the first switch. The negative side second changeover relay 53 may be referred to as the negative side fourth switch. The positive side second changeover relay 54 may be referred to as the positive side fourth switch.

[0029] A positive system main relay 24 is provided in the first connection piece 21. The positive system main relay 24 is provided in the first connection piece 21, between the connection portion of the power conversion device 3 and the first connection portion 41. A negative system main relay 25 is provided in the second connection piece 22. The negative system main relay 25 is provided in the second connection piece 22, between the connection portion of the power conversion device 3 and the second connection portion 42. A first switching relay 26 is provided in the third connection piece 23.

[0030] A positive-side charging relay 33 is provided on the positive-side second wiring 31. A negative-side charging relay 34 is provided on the negative-side second wiring 32. A positive-side second switching 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 portion 41. The other end of the positive-side third wiring 51 is connected between the connection portion of the third connection piece 23 with the first switching relay 26 and the connection portion with the second battery 2B. The connection portion 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 portion 61. A closed loop is formed by the positive-side third wiring 51, the third connection piece 23, the first switching relay 26, the first battery 2A, and a portion of the first connection piece 21.

[0031] A negative-side second switching 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 portion 42. The other end of the negative-side third wiring 52 is connected between the connection portion of the third connection piece 23 with the first switching relay 26 and the connection portion with the first battery 2A. The connection portion between the other end of the negative-side third wiring 52 and the third connection piece 23 may be referred to as a fourth connection portion 62. A closed loop is formed by the negative-side third wiring 52, the third connection piece 23, the first switching relay 26, the second battery 2B, and a portion of the second connection piece 22.

[0032] As will be explained in detail later, the system main relays 24, 25 and the first switching relay 26 are relays used when running at 800 V. The charging relays 33, 34 and the first switching relay 26 are relays used when charging at 800 V. The second switching relays 53, 54 and the charging relays 33, 34 are relays used when charging at 400 V. The first switching relay 26, the system main relays 24, 25, and the charging relays 33, 34 are approximately the same in size. The second switching relays 53, 54 are smaller in size than the relays 24, 25, 26, 33, 34. The amount of heat and electromagnetic noise generated by the second switching relays 53, 54 is smaller than the amount of heat and electromagnetic noise generated by the relays 24, 25, 26, 33, 34.

[0033] Hereinafter, the positive side system main relay 24 and the negative side system main relay 25 may be collectively referred to as the system main relays 24, 25. The first switching relay 26, the negative side second switching relay 53, and the positive side second switching relay 54 may be referred to as the switching relays 26, 53, 54. The positive side charging relay 33 and the negative side charging relay 34 may be referred to as the charging relays 33, 34.

[0034] The system main relays 24, 25, the switching relays 26, 53, 54, and the charging relays 33, 34 open and close in response to control signals from the ECU. The ECU includes a processing unit such as a CPU, memory devices including RAM and ROM, input / output devices, etc. The input / output devices are electrically connected to the seven relays 24, 25, 26, 33, 34, 53, 54, as well as to each switching element of the power conversion device 3 and the charging stand 6.

[0035] The arithmetic processing device executes a program stored in the memory device. The arithmetic processing device performs arithmetic processing in accordance with the program. The arithmetic processing device also performs arithmetic processing using data stored in the memory device. The arithmetic processing device controls each switching element and seven relays 24, 25, 26, 33, 34, 53, and 54 via the input / output device. In this embodiment, the processing operations performed by the arithmetic processing device are described as processing operations of the ECU. The ECU can also be called an electronic control device.

[0036] <800V Travel> The arithmetic processing device is configured to be electrically connectable to the charging stand 6 via the input / output device. When the battery 2 is not being charged from the charging stand 6, the arithmetic processing device outputs ON signals to the system main relays 24, 25 and the first switching relay 26. At the same time, the arithmetic processing device outputs OFF signals to the charging relays 33, 34 and the second switching relays 53, 54. As a result, a current path is formed through which a current flows, as shown by the dashed line in Fig. 3. The current path includes the energized relays 24, 25, 26, the battery 2A, the second battery 2B, and the first wiring 20.

[0037] Due to the above-described electrical connection configuration, when the battery device 2 is not being charged from the charging stand 6, 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 approximately 800 V. The battery device 2 is connected to the power conversion device 3 via the first connection piece 21 and the second connection piece 22. A source of power of approximately 800 V is supplied to the power conversion device 3.

[0038] The power converter 3 converts the supplied power from DC to AC. The converted 800V power is supplied to the motor generator. The motor generator runs on the converted AC power, and the electric vehicle runs in this way.

[0039] <800V Charging> When charging the battery 2 from the charging stand 6, the arithmetic processing device outputs an OFF signal to the system main relays 24, 25. When connected to a high-voltage quick charger as the charging stand 6, the arithmetic processing device outputs an ON signal to the charging relays 33, 34 and the first switching relay 26. In addition, the arithmetic processing device outputs an OFF signal to the second switching relays 53, 54 and the system main relays 24, 25. As a result, a current path is formed through which a current flows, as shown by the dashed lines in FIG. 4 . The current path includes the energized relays 26, 33, 34, the first battery 2A, the second battery 2B, the positive-side second wiring 31, the negative-side second wiring 32, and a portion of the first wiring 20 that connects the first connection 41 and the second connection 42.

[0040] Due to the electrical connection configuration described above, when connected to a high-voltage quick 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 approximately 800 V. External power of approximately 800 V 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 with external power of approximately 800 V.

[0041] <400V Charging> When connected to a low-voltage quick charger as the charging stand 6, the arithmetic processing device outputs ON signals to the charging relays 33, 34 and the second switching relays 53, 54. In addition, the arithmetic processing device outputs OFF signals to the first switching relay 26 and the system main relays 24, 25. This forms two current paths through which current flows, as shown by the dashed lines in Fig. 5 .

[0042] One current path includes the energized relays 33, 34, 53, the battery 2A, the positive-side second wiring 31, the negative-side second wiring 32, the negative-side third wiring 52, and a portion of the first wiring 20 that connects the first connection portion 41 and the fourth connection portion 62. External power of approximately 400 V is supplied to the first battery 2A via this path. The first battery 2A is charged by the external power of approximately 400 V.

[0043] Another current path includes the energized relays 33, 34, 54, the second battery 2B, the positive-side second wiring 31, the negative-side second wiring 32, the positive-side third wiring 51, and a portion of the first wiring 20 that connects the second connection part 42 and the third connection part 61. External power of approximately 400 V is supplied to the second battery 2B via this path. The second battery 2B is charged by the external power of approximately 400 V.

[0044] Note that the same function as that of outputting an ON signal from each of the relays 24, 25, 26, 33, 34, 53, and 54 may be provided by stopping the output of an OFF signal. The same function as that of outputting an OFF signal from each of the relays 24, 25, 26, 33, 34, 53, and 54 may be provided by stopping the output of an ON signal.

[0045] <Configuration of Equipment Module> Next, the configuration of the high-voltage J / B 10 will be described with reference to Figure 6. Note that each drawing schematically shows the components of the high-voltage J / B 10. Below, the three mutually orthogonal directions are referred to as the X direction, Y direction, and Z direction. In the drawings, the notation of "direction" is omitted, and only X, Y, and Z are used. The X direction corresponds to the arrangement direction. The direction orthogonal to the X direction corresponds to the orthogonal direction. The Y direction of the orthogonal directions corresponds to the second direction. The Z direction of the orthogonal directions corresponds to the first direction. The high-voltage J / B 10 is provided in the body of the vehicle. As an example, the high-voltage J / B 10 is arranged under the floor of the passenger compartment.

[0046] The high voltage J / B 10 has a power control circuit 70 and a fixed base 80. The fixed base 80 has a roughly rectangular parallelepiped shape. The fixed base 80 has a mounting surface 81 on which the power control circuit 70 is mounted, and a mounting surface on the back side thereof. Seven relays 24, 25, 26, 33, 34, 53, and 54 are mounted on the mounting surface 81. The mounting surface 81 and the mounting surface are spaced apart in the Z direction. The mounting surface is the surface that faces the floor of the passenger compartment. The high voltage J / B 10 is fixed to the vehicle by fixing the mounting surface to the floor of the passenger compartment. The fixed base 80 is made primarily of insulating resin. The mounting surface corresponds to the back side.

[0047] The mounting surface 81 extends in a plane along the X and Y directions. The mounting surface 81 has a first end 82 and a third end 84 that are spaced apart in the X direction. The mounting surface 81 has a second end 83 and a fourth end 85 that are spaced apart in the Y direction. The first end 82 to the fourth end 85 are integrally connected in this order clockwise.

[0048] The first switching relay 26 is mounted at the center in the X direction on the mounting surface 81. The second switching relays 53, 54 are mounted so as to sandwich the first switching relay 26 from both sides in the X direction. The system main relays 24, 25 are mounted so as to sandwich the second switching relays 53, 54 from both sides in the X direction. The charging relays 33, 34 are mounted so as to sandwich the second switching relays 53, 54 from both sides in the X direction. Note that the first switching relay 26 does not have to be mounted at the center in the X direction on the mounting surface 81. As long as the arrangement order is as described above, the position where the first switching relay 26 is arranged on the mounting surface 81 is not limited to the center.

[0049] The arrangement of the seven relays 24, 25, 26, 33, 34, 53, and 54 will be described in more detail below. The first switching relay 26 is used as a reference. The positive second switching relay 54, the positive system main relay 24, and the positive charging relay 33 are arranged closer to the third end 84 than the first switching relay 26. The negative second switching relay 53, the negative system main relay 25, and the negative charging relay 34 are arranged closer to the first end 82 than the first switching relay 26.

[0050] The seven relays 24, 25, 26, 33, 34, 53, and 54 are aligned so as to overlap in the X direction and mounted on the mounting surface 81. More specifically, the seven relays 24, 25, 26, 33, 34, 53, and 54 are aligned so as to overlap in the X direction and mounted on the mounting surface 81. Note that all of the seven relays 24, 25, 26, 33, 34, 53, and 54 do not have to be aligned so as to overlap in the X direction.

[0051] The battery device 2 is disposed adjacent to the fourth end 85 of the fixed base 80 in the Y direction. The power conversion device 3 and the charging inlet 4 are disposed adjacent to the second end 83 of the fixed base 80 in the Y direction. As described above, the battery device 2 and the seven relays 24, 25, 26, 33, 34, 53, and 54 are electrically connected by the respective wiring. The connection of each wiring has been described above, so a description thereof will be omitted.

[0052] The arrangement of the seven relays 24, 25, 26, 33, 34, 53, and 54 is not limited to the above. As another example, the positive-side system main relay 24 and the positive-side second switching relay 54 may be provided between the first switching relay 26 and the negative-side charging relay 34. The negative-side system main relay 25 and the negative-side second switching relay 53 may be provided between the first switching relay 26 and the positive-side charging relay 33. It is sufficient that one of the system main relays 24, 25 and one of the second switching relays 53, 54 are provided between the first switching relay 26 and the negative-side charging relay 34. It is sufficient that the remaining one of the system main relays 24, 25 and the remaining one of the second switching relays 53, 54 are provided between the first switching relay 26 and the positive-side charging relay 33.

[0053] <Heat and Electromagnetic Noise> As described above, when the vehicle is running at 800 V, the first switching relay 26 and the system main relays 24, 25 are in a conducting state. When the vehicle is running at 800 V, the first switching relay 26 and the system main relays 24, 25 serve as part of the current path. The current path is a path through which power of about 800 V flows between the battery device 2 and the power conversion device 3. For this reason, the first switching relay 26 and the system main relays 24, 25 are prone to generating heat and electromagnetic noise.

[0054] During 800V charging, the first switching relay 26 and the charging relays 33 and 34 are in a conducting state. During 800V charging, the first switching relay 26 and the charging relays 33 and 34 serve as part of the current path. The current path is the path through which power of about 800V flows between the battery device 2 and the charging stand 6. For this reason, the first switching relay 26 and the charging relays 33 and 34 are prone to generating heat and electromagnetic noise.

[0055] During 400V charging, the second switching relays 53, 54 and the charging relays 33, 34 are energized. During 400V charging, the second switching relays 53, 54 and the charging relays 33, 34 serve as part of the energization path. The energization path refers to the path through which power of approximately 400V flows between the batteries 2A, 2B and the charging stand 6. For this reason, the second switching relays 53, 54 and the charging relays 33, 34 are prone to generating heat and electromagnetic noise. Note that the amounts of heat and electromagnetic noise generated by the second switching relays 53, 54 and the charging relays 33, 34 during 400V charging are less than those during 800V driving and 800V charging.

[0056] <Operation and Effect> During 800V charging, the system main relays 24, 25 and the second switching relays 53, 54 are in a non-conductive state. The system main relays 24, 25 and the second switching relays 53, 54 are arranged between the first switching relay 26 and the charging relays 33, 34. In the X direction, the system main relays 24, 25 and the second switching relays 53, 54 are arranged within the projection area of ​​the first switching relay 26. The system main relays 24, 25 and the second switching relays 53, 54 are arranged within the projection area of ​​the charging relays 33, 34. The first switching relay 26 and the charging relays 33, 34 do not face each other in the X direction.

[0057] As a result, the heat and electromagnetic noise generated from the first switching relay 26 and the charging relays 33 and 34 are shielded by the system main relays 24 and 25. The heat and electromagnetic noise generated from the first switching relay 26 and the charging relays 33 and 34 are shielded by the second switching relays 53 and 54. Thermal and magnetic interference between the first switching relay 26 and the charging relays 33 and 34 is suppressed. Furthermore, the system main relays 24 and 25 are approximately the same size as the first switching relay 26 and the charging relays 33 and 34. Therefore, thermal and magnetic interference between the first switching relay 26 and the charging relays 33 and 34 can be effectively suppressed.

[0058] During 800V charging, unused relays 24, 25, 53, and 54 do not generate heat or electromagnetic noise. Therefore, even if unused relays 24, 25, 53, and 54 are placed between used relays 26, 33, and 34, their performance is not degraded. The unused relays 24, 25, 53, and 54 can be used to suppress interference of heat and electromagnetic noise between used relays 26, 33, and 34. There is no need to provide a mechanism for suppressing interference of heat and electromagnetic noise to suppress interference of heat and electromagnetic noise between used relays 26, 33, and 34. This prevents the high-voltage J / B 10 from becoming larger in size, increasing the number of parts, and complicating the design.

[0059] The first switching relay 26 is sandwiched between the second switching relays 53, 54 in the X direction. The positive side second switching relay 54 is provided between the positive side charging relay 33 and the first switching relay 26. The negative side second switching relay 53 is provided between the negative side charging relay 34 and the first switching relay 26. This allows the positive side second switching relay 54 to block heat and electromagnetic noise generated from the positive side charging relay 33. The negative side second switching relay 53 blocks heat and electromagnetic noise generated from the negative side charging relay 34. The second switching relays 53, 54 prevent heat and electromagnetic noise from being transmitted from the charging relays 33, 34 on both sides in the X direction to the first switching relay 26.

[0060] Furthermore, when the vehicle is running at 800V, the second changeover relays 53, 54 are in a non-conductive state. The second changeover relays 53, 54 are disposed between the first changeover relay 26 and the system main relays 24, 25. In the X direction, the second changeover relays 53, 54 are disposed within the projection areas of the first changeover relay 26 and the system main relays 24, 25. The first changeover relay 26 and the system main relays 24, 25 do not face each other in the X direction. This allows the second changeover relays 53, 54 to block heat and electromagnetic noise generated from the first changeover relay 26 and the system main relays 24, 25. Thermal and magnetic interference between the first changeover relay 26 and the system main relays 24, 25 is suppressed.

[0061] During 400V charging, the system main relays 24, 25 and the first switching relay 26 are de-energized. The system main relays 24, 25 are arranged between the charging relays 33, 34 and the second switching relays 53, 54. In the X direction, the system main relays 24, 25 are arranged within the projected areas of the charging relays 33, 34 and the second switching relays 53, 54. The charging relays 33, 34 and the second switching relays 53, 54 do not face each other in the X direction. This allows the system main relays 24, 25 to shield the heat and electromagnetic noise generated by the charging relays 33, 34 and the second switching relays 53, 54. Thermal and magnetic interference between the charging relays 33, 34 and the second switching relay 53 is suppressed.

[0062] Furthermore, during 400V charging, the first switching relay 26 is disposed between the second switching relays 53, 54. In the X direction, the first switching relay 26 is disposed within the projection area of ​​the second switching relays 53, 54. The negative-side second switching relay 53 and the positive-side second switching relay 54 do not face each other in the X direction. This allows the first switching relay 26 to block heat and electromagnetic noise generated from the second switching relays 53, 54. Thermal and magnetic interference between the second switching relay 53 and the second switching relay 54 is suppressed.

[0063] Second Embodiment In the first embodiment, the high-voltage J / B 10 includes seven relays 24, 25, 26, 33, 34, 53, and 54 and the wirings 20, 30, and 50 connected thereto. However, the high-voltage J / B 10 does not necessarily include all seven relays 24, 25, 26, 33, 34, 53, and 54 and the wirings 20, 30, and 50. FIG. 7 is a top view of the high-voltage J / B 10 in a second embodiment. The high-voltage J / B 10 in the second embodiment includes charging relays 33 and 34, system main relays 24 and 25, and wirings 20 and 30. The high-voltage J / B 10 does not include the switching relays 26, 53, and 54 and the third wiring 50. The switching relays 26, 53, and 54 and the third wiring 50 may be provided in the vehicle separately from the high-voltage J / B 10. The system main relays 24 and 25 may be referred to as electrical equipment.

[0064] Charging relays 33, 34 are provided at both ends of the mounting surface 81 in the X direction. System main relays 24, 25 are provided between the charging relays 33, 34. The positive-side charging relay 33 and the negative-side charging relay 34 do not face each other in the X direction. This allows the system main relays 24, 25 to shield heat and electromagnetic noise generated from the charging relays 33, 34 during 800 V charging. Thermal and magnetic interference between the charging relays 33, 34 is suppressed. Note that both system main relays 24, 25 do not have to be provided between the charging relays 33, 34. At least one of the system main relays 24, 25 may be provided so that the positive-side charging relay 33 and the negative-side charging relay 34 do not face each other in the X direction.

[0065] Furthermore, the high-voltage J / B 10 in the second embodiment may include charging relays 33, 34, second switching relays 53, 54, and wiring 20, 30. Fig. 8 is a top view of another high-voltage J / B 10 in the second embodiment. The high-voltage J / B 10 does not include system main relays 24, 25, first switching relay 26, and third wiring 50. The system main relays 24, 25, first switching relay 26, and third wiring 50 may be provided in the vehicle separately from the high-voltage J / B 10. The second switching relays 53, 54 may also be referred to as electrical equipment.

[0066] Second switching relays 53, 54 are provided between the charging relays 33, 34. The positive-side charging relay 33 and the negative-side charging relay 34 do not face each other in the X direction. This allows the second switching relays 53, 54 to block heat and electromagnetic noise generated from the charging relays 33, 34 during 800 V charging. Thermal and magnetic interference between the charging relays 33, 34 is suppressed. Note that both second switching relays 53, 54 do not have to be provided between the charging relays 33, 34. At least one of the second switching relays 53, 54 may be provided so that the positive-side charging relay 33 and the negative-side charging relay 34 do not face each other in the X direction.

[0067] (Third Embodiment) The high-voltage J / B 10 does not necessarily have the system main relays 24, 25 or the switching relays 53, 54 of the second embodiment. FIG. 9 is a top view of the high-voltage J / B 10 of the third embodiment. The high-voltage J / B 10 of the third embodiment includes an electrical component 90, charging relays 33, 34, and wiring 20, 30 that are de-energized when the charging relays 33, 34 are energized. The energized state of the charging relays 33, 34 can also be referred to as charging. In the third embodiment, the electrical component 90 is disposed between the charging relays 33, 34 instead of the system main relays 24, 25 and the switching relays 53, 54. The electrical component 90 prevents the positive-side charging relay 33 and the negative-side charging relay 34 from facing each other in the X direction. This also achieves the same effect. The electrical component 90 may also be referred to as an electrical device.

[0068] (Fourth embodiment) In addition to the components included in the second embodiment, the high-voltage J / B 10 of the fourth embodiment includes a first switching relay 26. Fig. 10 is a top view of the high-voltage J / B 10 of the fourth embodiment. The high-voltage J / B 10 of the fourth embodiment includes charging relays 33, 34, system main relays 24, 25, a first switching relay 26, and wiring 20, 30. The high-voltage J / B 10 does not include second switching relays 53, 54 or a third wiring 50.

[0069] A first switching relay 26 is provided between the charging relays 33, 34. A system main relay 24 is provided between the positive side charging relay 33 and the first switching relay 26. The positive side charging relay 33 and the first switching relay 26 do not face each other in the X direction. A system main relay 25 is provided between the negative side charging relay 34 and the first switching relay 26. The negative side charging relay 34 and the first switching relay 26 do not face each other in the X direction. Heat and electromagnetic noise generated from the charging relays 33, 34 and the first switching relay 26 during 800 V charging are shielded by the system main relays 24, 25. Thermal and magnetic interference between the charging relays 33, 34 and the first switching relay 26 is suppressed.

[0070] It is not necessary to provide both the system main relays 24 and 25 between the charging relays 33 and 34. At least one of the system main relays 24 and 25 may be provided between the charging relays 33 and 34. This also provides the same effect.

[0071] Fifth Embodiment FIG. 11 is a top view of a high-voltage J / B 10 according to a fifth embodiment. The high-voltage J / B 10 of the fifth embodiment includes charging relays 33, 34, switching relays 26, 53, 54, and wiring 20, 30, 50. The high-voltage J / B 10 does not include system main relays 24, 25. A positive-side second switching relay 54 is provided between the positive-side charging relay 33 and the first switching relay 26. The positive-side charging relay 33 and the first switching relay 26 do not face each other in the X direction. A negative-side second switching relay 53 is provided between the negative-side charging relay 34 and the first switching relay 26. The negative-side charging relay 34 and the first switching relay 26 do not face each other in the X direction. Heat and electromagnetic noise generated from the charging relays 33, 34 and the first switching relay 26 during 800 V charging are shielded by the second switching relays 53, 54. Thermal and magnetic interference between the charging relays 33 and 34 and the first switching relay 26 is suppressed.

[0072] It is not necessary to provide both of the second switching relays 53 and 54 between the charging relays 33 and 34. At least one of the second switching relays 53 and 54 may be provided between the charging relays 33 and 34. This also provides the same effect.

[0073] 12 is a top view of the high-voltage J / B 10 according to the sixth embodiment. The high-voltage J / B 10 according to the sixth embodiment includes charging relays 33 and 34, a first switching relay 26, an electrical component 90, and wiring 20 and 30. The electrical component 90 is in a non-conductive state when the charging relays 33 and 34 and the first switching relay 26 are in a conductive state. The state when the charging relays 33 and 34 and the first switching relay 26 are in a conductive state can be rephrased as the state during 800 V charging.

[0074] In the sixth embodiment, an electrical component 90 is disposed between the positive electrode side charging relay 33 and the first switching relay 26. The positive electrode side charging relay 33 and the first switching relay 26 do not face each other in the X direction. The electrical component 90 is disposed between the negative electrode side charging relay 34 and the first switching relay 26. The negative electrode side charging relay 34 and the first switching relay 26 do not face each other in the X direction. This also achieves the same effects as the fourth and fifth embodiments.

[0075] Seventh Embodiment Figure 13 is a top view of a high-voltage J / B 10 according to a seventh embodiment. The components of the high-voltage J / B 10 according to the seventh embodiment are similar to those of the first embodiment. In the seventh embodiment, switching relays 26, 53, and 54 have legs fixed to a fixed base 80. The first switching relay 26 has a fixed leg 26A on one end side and a fixed leg 26B on the other end side fixed to the fixed base 80.

[0076] The negative-side second switching relay 53 has one end fixed leg 53A and the other end fixed leg 53B fixed to the fixing base 80. The positive-side second switching relay 54 has one end fixed leg 54A and the other end fixed leg 54B fixed to the fixing base 80. The one end fixed legs 26A, 53A, 54A are provided on the first end 82 side of each relay 26, 53, 54. The other end fixed legs 26B, 53B, 54B are provided on the third end 84 side of each relay 26, 53, 54.

[0077] The negative-side second switching relay 53 is disposed offset in the Y direction from the first switching relay 26 toward the second end 83. A portion of the negative-side second switching relay 53 does not face the first switching relay 26 in the X direction. The other-end fixed leg 53B does not face the first switching relay 26 in the X direction. The one-end fixed leg 26A does not face the negative-side second switching relay 53 in the X direction. The other-end fixed leg 53B and the one-end fixed leg 26A overlap in the Y direction.

[0078] The positive-side second switching relay 54 is disposed offset in the Y direction from the first switching relay 26 toward the fourth end 85. A portion of the positive-side second switching relay 54 does not face the first switching relay 26 in the X direction. The one-end fixed leg 54A does not face the first switching relay 26 in the X direction. The other-end fixed leg 26B does not face the second switching relay 54 in the X direction. The one-end fixed leg 54A and the other-end fixed leg 26B overlap in the Y direction.

[0079] The overlap between fixed legs 26A, 26B and fixed legs 53B, 54A in the Y direction reduces the size of high-voltage J / B 10 in the X direction. Parts of second switching relays 53, 54 are positioned so as not to face first switching relay 26 in the X direction. This allows heat generated during 800V charging and 800V running to be easily dissipated into the air. This improves the heat dissipation performance of first switching relay 26.

[0080] Eighth Embodiment A high voltage J / B 1000 according to an eighth embodiment will be described with reference to Figures 14 to 23. The high voltage J / B 1000 corresponds to the high voltage J / B 10. The power conversion device 2000 in Figure 22 corresponds to the power conversion device 3. However, further improvements are required for the high voltage J / B 1000 in terms of the thermal and magnetic interference described above, and in other aspects not mentioned.

[0081] 22, the high-voltage J / B 1000 is configured to be electrically connectable to the power conversion device 2000 via external bus bars 987 and 988. The high-voltage J / B 1000 is configured to be electrically connectable to a load such as a motor generator via the power conversion device 2000. The high-voltage J / B 1000 is also configured to be electrically connectable to the battery device 2 via external bus bars 981 to 984. The power conversion device 2000 can also be considered as a load.

[0082] As shown in FIG. 23 , the high-voltage J / B 1000 is electrically connected to the power conversion device 2000 and the battery device 2. The high-voltage J / B 1000 can connect the first battery 2A and the second battery 2B in series or parallel. Therefore, the high-voltage J / B 1000 can change its output voltage. A device including the battery device 2 and the high-voltage J / B 1000 corresponds to a power storage device. The power storage device can also be said to include the battery device 2 and the high-voltage J / B 1000 having at least the system main relays 100, 500, the first semiconductor parallel relay 400, the second semiconductor parallel relay 200, and the series relay 300. Each of the relays 100, 200, 300, 400, and 500 will be described later.

[0083] 22 , the first battery 2A includes battery units 2A1 and 2A2 connected in series. The second battery 2B includes battery units 2B1 and 2B2 connected in series. Each of the battery units 2A1, 2A2, 2B1, and 2B2 includes a plurality of battery cells. Each of the battery units 2A1, 2A2, 2B1, and 2B2 can be considered a battery module or a battery block.

[0084] The battery units 2A1 and 2A2 are electrically connected via an external bus bar 985. The battery units 2B1 and 2B2 are electrically connected via an external bus bar 986.

[0085] 22, the battery units 2A1, 2A2, 2B1, and 2B2 are arranged along the X direction. The battery device 2 is arranged in the following order: battery unit 2B2, battery unit 2A1, battery unit 2B1, and battery unit 2A2. Battery unit 2A1 and battery unit 2B1 are arranged adjacent to each other. The negative electrode side of battery unit 2A1 and the positive electrode side of battery unit 2B1 are arranged adjacent to each other.

[0086] The battery unit 2A1 can be considered as a first battery connected to the first switching relay 300. The battery unit 2B1 can be considered as a second battery connected to the first switching relay 300. The battery unit 2A1 and the battery unit 2B1 only need to be arranged such that the positive electrode side of one of the battery units 2A1 and 2B1 and the negative electrode side of the other of the battery units 2A1 and 2B1 are adjacent to each other.

[0087] The battery unit 2A1 has an opposing surface FS1 facing the battery unit 2B1 and an opposite surface OS1. The battery unit 2B1 has an opposing surface FS2 facing the battery unit 2A1 and an opposite surface OS2. The symbol VS1 denotes a first imaginary straight line VS1 that extends along the opposite surface OS1. The symbol VS2 denotes a second imaginary straight line VS2 that extends along the opposite surface OS2.

[0088] As shown in Figures 14 and 15, the high-voltage J / B 1000 includes a negative-side system main relay 100, a negative-side second switching relay 200, a first switching relay 300, a positive-side second switching relay 400, and a positive-side system main relay 500. The high-voltage J / B 1000 also includes a current sensor 600. The current sensor 600 is mounted on the mounting surface 81 of the fixed base 800 together with the relays 100, 200, 300, 400, and 500. Note that Figure 15 shows the mounting surface 81 side, while Figure 19 shows the placement surface side.

[0089] The negative side system main relay 100 corresponds to the negative side system main relay 25 (third switch, system main relay). The negative side second changeover relay 200 corresponds to the negative side second changeover relay 53 (fourth switch, second changeover relay). The first changeover relay 300 corresponds to the first changeover relay 26 (second switch). The positive side second changeover relay 400 corresponds to the positive side second changeover relay 54 (fourth switch, second changeover relay). The positive side system main relay 500 corresponds to the positive side system main relay 24 (third switch, system main relay). The fixing base 800 corresponds to the fixing base 80.

[0090] The negative system main relay 100 includes a relay body 101 including conductive terminals 102 and 103, and a fixed portion 100F. In addition to the terminals 102 and 103, the relay body 101 includes a movable terminal and a drive portion 100S that operates the movable terminal. The terminals 102 and 103 can also be considered fixed terminals. The fixed portion 100F is a portion for fixing the negative system main relay 100 to the fixed base 800. The negative system main relay 100 can be considered to have a mechanical relay portion. In addition, the negative system main relay 100 can be considered to be a mechanical relay.

[0091] The negative-side second switching relay 200 includes a relay body 201, conductive terminals 202 and 203, and a fixed part 200F. The relay body 201 includes a relay part (relay part) 200S made of a semiconductor. The fixed part 200F is a part for fixing the negative-side second switching relay 200 to a fixing base 800. The negative-side second switching relay 200 can be said to be a semiconductor relay.

[0092] The negative-side second switching relay 200 is electrically connected to an electric wire connecting the negative electrodes of the first battery 2A and the second battery 2B. The negative-side second switching relay 200 corresponds to a second semiconductor parallel relay. The electric wire here includes external bus bars 982, 984, etc.

[0093] The first changeover relay 300 includes a relay body 301 including conductive terminals 302 and 303, and a fixed portion 300F. In addition to the terminals 302 and 303, the relay body 301 includes a movable terminal and a drive portion 300S that operates the movable terminal. The terminals 302 and 303 can also be considered fixed terminals. The fixed portion 300F is a portion for fixing the first changeover relay 300 to the fixed base 800. The first changeover relay 300 can be considered to have a mechanical relay portion. Furthermore, the first changeover relay 300 can be considered a mechanical relay.

[0094] The first switching relay 300 is electrically connected to the positive electrode of one of the first battery 2A and the negative electrode of the other of the second battery 2B. More specifically, the first switching relay 300 is electrically connected to the positive electrode of one of the battery units 2A1, 2B1 arranged adjacent to each other and the negative electrode of the other of the battery units 2A1, 2B1. The electric wires here include external bus bars 981, 982, etc.

[0095] The first switching relay 300 is directly connected to the battery unit 2A1 of the first battery 2A and the battery unit 2B1 of the second battery 2B. "Direct" means electrically connected without passing through other battery units. In the high-voltage J / B 1000, depending on the positional relationship between the first switching relay 300 and the batteries 2A and 2B, it is conceivable that at least some of the routing of the bus bars 910, 920, 930, 940, 950, 960, and 970 (described later) may become complicated. For example, in the high-voltage J / B 1100 of Comparative Example 1 shown in FIG. 24 , the first switching relay 300 is disposed at one end in the arrangement direction X. In the high-voltage J / B 1100, the first switching relay 300 is not disposed in the area between the first virtual straight line VS1 and the second virtual straight line VS2.

[0096] Therefore, the fourth bus bar 940 and the fifth bus bar 950 are longer in the arrangement direction X than those of the present embodiment. As a result, the first bus bar 910 overlaps with the fifth bus bar 950 at the overlapping portion 910X. The third bus bar 930 overlaps with the fourth bus bar 940 at the overlapping portion 930X. As such, the high-voltage J / B 1100 of Comparative Example 1 has complex routing for at least some of the bus bars 910, 920, 930, 940, 950, 960, and 970. Furthermore, the high-voltage J / B 1100 of Comparative Example 1 is larger in size in the arrangement direction X.

[0097] Therefore, as shown in FIG. 22 , the first switching relay 300 is disposed in the area between the first virtual line VS1 and the second virtual line VS2. This allows the high-voltage J / B 1000 to simplify the routing of the bus bars 910, 920, 930, 940, 950, 960, and 970 (described later). This allows the high-voltage J / B 1000 to be compact. Furthermore, the high-voltage J / B 1000 allows the battery capacities of the first battery 2A and the second battery 2B to be increased. This improves the cruising range of an electric vehicle equipped with the high-voltage J / B 1000.

[0098] The positive electrode side second switching relay 400 includes a relay main body 401, conductive terminals 402 and 403, and a fixed portion 400F. The relay main body 401 includes a relay portion 400S made of a semiconductor. The fixed portion 400F is a portion for fixing the positive electrode side second switching relay 400 to a fixing base 800. The positive electrode side second switching relay 400 can be said to be a semiconductor relay.

[0099] The positive-side second switching relay 400 is electrically connected to an electric wire connecting the positive electrodes of the first battery 2A and the second battery 2B. The positive-side second switching relay 400 corresponds to a first semiconductor parallel relay. The electric wire here includes external bus bars 981, 983, etc.

[0100] The positive system main relay 500 includes a relay body 501, conductive terminals 502 and 503, and a fixed portion 500F. The relay body 501 includes a relay portion 500S made of a semiconductor. The fixed portion 500F is a portion for fixing the positive system main relay 500 to a fixing base 800. The positive system main relay 500 can be said to be a semiconductor relay.

[0101] The positive side system main relay 500 is provided in pair with the negative side system main relay 100. The negative side system main relay 100 and the positive side system main relay 500 electrically connect the battery device 2 and the power conversion device 2000.

[0102] It is sufficient if only one of the system main relays 100, 500 is a semiconductor relay. This allows the size of the fixed base 800 to be smaller than in a configuration in which mechanical relays are used as both system main relays 100, 500. Also, the weight of the high-voltage J / B 1000 can be reduced.

[0103] Furthermore, even if the main relay in the semiconductor relay system fails to turn on, the main relay in the mechanical relay system can be used to cut off the power. Functions such as fuses can be integrated, and space can be saved.

[0104] The charging relays 33, 34 include a mechanical relay unit. The charging relays 33, 34 can also be considered mechanical relays. However, only one of the charging relays 33, 34 may be a semiconductor relay. Either one of the charging relays 33, 34 has a relay unit made of a semiconductor. This allows the size of the fixed base 800 to be smaller than a configuration in which both charging relays 33, 34 are mechanical relays. The high-voltage J / B 1000 can also be made lighter. Furthermore, even if the semiconductor relay charging relay fails to turn on, it can be cut off by the mechanical relay charging relay. Functions such as fuses can be integrated. Space savings are possible.

[0105] The current sensor 600 includes a sensor body 601 and terminals 602 and 603 .

[0106] The first switching relay 300 is a relay for connecting the first battery 2A and the second battery 2B in series. The first switching relay 300 can also be called a series relay.

[0107] The negative side second switching relay 200 and the positive side second switching relay 400 are relays for connecting the first battery 2A and the second battery 2B in parallel. The negative side second switching relay 200 and the positive side second switching relay 400 can also be called parallel relays. Note that it is sufficient that the parallel relays 200, 400 each include a relay unit in which at least one is made of a semiconductor. In other words, one of the parallel relays 200, 400 may be a semiconductor relay and the other a mechanical relay.

[0108] Generally, semiconductor relays generate more heat than mechanical relays under the same current flow. However, the parallel relays 200 and 400 generate less heat (are less likely to generate heat) because they have a smaller current flow than the series relay 300 and the like. Therefore, the parallel relays 200 and 400 are ideal components for use with semiconductor relays. Furthermore, by using semiconductor relays as the parallel relays 200 and 400, the size of the fixed base 800 can be made smaller than in a configuration using mechanical relays. Furthermore, the weight of the high-voltage J / B 1000 can be reduced.

[0109] As shown in Figures 14, 15, etc., the fixed base 800 can be said to have a fixed base 801 having a mounting surface 81 and a placement surface. The fixed base 801 is made primarily of resin. The fixed base 800 can also be said to be a J / b case or a case. The fixed base 801 can also be said to be a case base. The symbol LS in Figures 14, 15, etc. indicates the side surface on the power conversion device 3 side. The side surface LS corresponds to the second end 83. The symbol PS indicates the side surface on the battery device 2 side. The side surface PS corresponds to the fourth end 85.

[0110] The fixed base 801 is provided with terminal receiving portions 802, 803, 804, 805, 806, and 807 in which external terminal portions, which will be described later, are arranged. The terminal receiving portions 802, 803, 804, 805, 806, and 807 are provided so as to protrude from the surrounding area. The external terminal portion 934 is arranged in the terminal receiving portion 802. The external terminal portion 944 is arranged in the terminal receiving portion 803. The external terminal portion 954 is arranged in the terminal receiving portion 804. The external terminal portion 963 is arranged in the terminal receiving portion 805. The external terminal portion 913 is arranged in the terminal receiving portion 806. The external terminal portion 973 is arranged in the terminal receiving portion 807.

[0111] 14 and 15 , a plurality of bus bars 910, 920, 930, 940, 950, 960, and 970, which are part of the wiring 20 and 50, are mounted on the fixing base 800. The plurality of bus bars 910, 920, 930, 940, 950, 960, and 970 are formed by bending a metal plate whose main component is a metal such as copper. Reference numeral 10F denotes a fixing member such as a screw.

[0112] As shown in FIG. 16 , the first bus bar 910 includes a contact portion 911 , an extension portion 912 , and an external terminal portion 913 .

[0113] The contact portion 911 is disposed opposite the terminal 102. The contact portion 911 is a portion that comes into contact with the terminal 102. When the movable terminal is moved by the driving unit 100S, the terminal 102 switches between a state in which it is electrically connected to the contact portion 911 and a state in which it is not electrically connected to the contact portion 911.

[0114] The extension portion 912 is a portion that is continuous with the contact portion 911. The extension portion 912 is provided between the contact portion 911 and the external terminal portion 913.

[0115] The external terminal portion 913 is fixed to the fixing base 800 by a fixing member 10F. The external terminal portion 913 is a portion to which an external bus bar 988 is connected. The external terminal portion 913 is connected to a low-potential side terminal of the power conversion device 2000 via the external bus bar 988 ( FIG. 22 ). The external terminal portion 913 can also be referred to as a load-side connection portion.

[0116] As shown in FIG. 16 , the second bus bar 920 includes a contact portion 921 , an extension portion 922 , and a connection portion 923 .

[0117] The contact portion 921 is disposed opposite the terminal 103. The contact portion 921 is a portion that comes into contact with the terminal 103. The terminal 103 switches between a state in which it is electrically connected to the contact portion 921 and a state in which it is not electrically connected to the contact portion 921 as the movable terminal is moved by the drive unit 100S.

[0118] The extension portion 922 is a portion that is continuous with the contact portion 921. The extension portion 922 is provided between the contact portion 921 and the connection portion 923.

[0119] The connection portion 923 is connected to the terminal 602. The connection portion 923 is fixed to the fixing base 800 together with the terminal 602 by a fixing member 10F.

[0120] As shown in FIG. 16 , the third bus bar 930 includes a first connecting portion 931 , an extension portion 932 , a second connecting portion 933 , and an external terminal portion 934 .

[0121] The first connecting portion 931 is connected to the terminal 603. The first connecting portion 931 is fixed to the fixing base 800 together with the terminal 603 by a fixing member 10F.

[0122] The extension portion 932 is a portion that is continuous with the first connection portion 931. The extension portion 932 is provided between the first connection portion 931 and the second connection portion 933.

[0123] The second connection portion 933 is connected to the terminal 202. The second connection portion 933 is fixed to the fixed base 800 together with the terminal 202 by a fixing member 10F. The second connection portion 933 has an extension portion 932 on one side and an external terminal portion 934 on the other side.

[0124] The external terminal portion 934 is a portion connected to the second connection portion 933. The external terminal portion 934 is fixed to the fixing base 800 by a fixing member 10F. The external terminal portion 934 is a portion to which an external bus bar 984 is connected. The external terminal portion 934 is connected to the negative electrode of the battery portion 2B2 via the external bus bar 984 ( FIG. 22 ).

[0125] As shown in FIG. 17 , the fourth bus bar 940 includes a connection portion 941 , an extension portion 942 , a contact portion 943 , and an external terminal portion 944 .

[0126] The connection portion 941 is connected to the terminal 203. The connection portion 941 is fixed to the fixing base 800 together with the terminal 203 by a fixing member 10F.

[0127] The extension portion 942 is a portion that is continuous with the connection portion 941. The extension portion 942 is provided between the connection portion 941 and the contact portion 943 and between the connection portion 941 and the external terminal portion 944.

[0128] The contact portion 943 is disposed opposite the terminal 302. The contact portion 943 is a portion that comes into contact with the terminal 302. When the movable terminal is moved by the drive unit 300S, the terminal 302 switches between a state in which it is electrically connected to the contact portion 943 and a state in which it is not electrically connected to the contact portion 943.

[0129] The external terminal 944 is fixed to the fixed base 800 by a fixing member 10F. The external terminal 944 is a portion to which an external bus bar 982 is connected. The external terminal 944 is connected to the negative electrode of the battery unit 2A1 via the external bus bar 982 (FIG. 22).

[0130] As shown in FIG. 17 , the fifth bus bar 950 includes a connection portion 951 , an extension portion 952 , a contact portion 953 , and an external terminal portion 954 .

[0131] The connection portion 951 is connected to the terminal 402. The connection portion 951 is fixed to the fixing base 800 together with the terminal 402 by a fixing member 10F.

[0132] The extension portion 952 is a portion that is continuous with the connection portion 951. The extension portion 952 is provided between the connection portion 951 and the contact portion 953 and between the connection portion 951 and the external terminal portion 954.

[0133] The contact portion 953 is disposed opposite the terminal 303. The contact portion 953 is a portion that comes into contact with the terminal 303. The terminal 303 switches between a state in which it is electrically connected to the contact portion 953 and a state in which it is not electrically connected to the contact portion 953 as the movable terminal is moved by the drive unit 300S.

[0134] The external terminal portion 954 is fixed to the fixed base 800 by a fixing member 10F. The external terminal portion 954 is a portion to which an external bus bar 981 is connected. The external terminal portion 954 is connected to the positive electrode of the battery portion 2B1 via the external bus bar 981 (FIG. 22).

[0135] As shown in FIG. 18 , the sixth bus bar 960 includes a connection portion 961 , an extension portion 962 , and an external terminal portion 963 .

[0136] The connection portion 961 is connected to the terminal 403. The connection portion 961 is fixed to the fixing base 800 together with the terminal 403 by a fixing member 10F. The connection portion 961 is also connected to the terminal 502.

[0137] The extension portion 962 is a portion that is continuous with the connection portion 961. The extension portion 962 is provided between the connection portion 961 and the external terminal portion 963.

[0138] The external terminal portion 963 is fixed to the fixed base 800 by a fixing member 10F. The external terminal portion 963 is a portion to which an external bus bar 983 is connected. The external terminal portion 963 is connected to the positive electrode of the battery portion 2A2 via the external bus bar 983 (FIG. 22).

[0139] As shown in FIG. 18 , the seventh bus bar 970 includes a connection portion 971 , an extension portion 972 , and an external terminal portion 973 .

[0140] The connection portion 971 is connected to the terminal 503. The connection portion 971 is fixed to the fixing base 800 together with the terminal 503 by a fixing member 10F.

[0141] The extension portion 972 is a portion that is continuous with the connection portion 971. The extension portion 972 is provided between the connection portion 971 and the external terminal portion 973.

[0142] The external terminal 973 is fixed to the fixed base 800 by a fixing member 10F. The external terminal 973 is a portion to which an external bus bar 987 is connected. The external terminal 973 is connected to the high-potential side terminal of the power conversion device 2000 via the external bus bar 987 ( FIG. 22 ). The external terminal 973 can also be referred to as a load-side connection portion.

[0143] 14 , 15 , 16 , and 17 , the terminal 202 extending directly from the semiconductor relay 200 is located on the near side with respect to the second connection portion 933 when viewed from the direction in which the semiconductor relay 200 is housed in the fixing base 800. The terminal 203 extending directly from the semiconductor relay 200 is located on the near side with respect to the connection portion 941 when viewed from the direction in which the semiconductor relay 200 is housed in the fixing base 800.

[0144] That is, the fixed base 800, the second connecting portion 933, and the terminal 202 are arranged in this order. Similarly, the fixed base 800, the connecting portion 941, and the terminal 203 are arranged in this order.

[0145] This allows the semiconductor relay 200 to be removed independently when the semiconductor relay 200 breaks down. The same applies to the other semiconductor relays 400 and 500.

[0146] The connection portions 933 and 941 correspond to connection portions with other current-carrying members. The storage direction can also be said to be the direction in which the semiconductor relay 200 and the like are fixed to the fixing base 800. The fixing direction and storage direction are the Z direction. The Z direction is also perpendicular to the mounting surface 81.

[0147] 19, 20, and 21, the high-voltage J / B 1000 is provided with a cooling section. The fixed base 801 has a recess 808 formed on the mounting surface of the fixed stand 800. A lid member 830 is attached to the recess 808. The cooling section of the high-voltage J / B 1000 is mainly composed of the fixed base 801 and the lid member 830. It can also be said that the fixed stand 800 has a cooling section that includes a flow path member that forms a path for the cooling water and at least two connection parts for introducing and discharging the cooling water.

[0148] The cooling unit forms flow paths 830A, 830B, and 830C through which cooling water flows. The cooling unit forms flow paths that cool the cooling object in parallel. Flow paths that cool the cooling object in parallel can also be called parallel flow paths. The two-dot chain line in FIG. 19 indicates the flow direction of the cooling water. The dashed line in FIG. 19 indicates the relays 100, 200, 300, 400, and 500 and the current sensor 600 on the mounting surface 81 side. The flow paths 830A, 830B, and 830C correspond to paths.

[0149] As shown in Figures 20 and 21, the cover member 830 includes flow path forming portions 831 and 832 that form a main flow path 830A, and a contact portion 833 that contacts the fixed base. The flow path forming portion 831 is a portion that forms the main flow path 830A, which is mainly on the side where the cooling water flows in. The flow path forming portion 832 is a portion that forms the main flow path 830A, which is mainly on the side where the cooling water is discharged. The flow path includes the main flow path 830A and branch flow paths 830B and 830C that branch off from the main flow path 830A. Note that Figures 20 and 21 illustrate a portion of the cross section indicated in Figure 19. The cover member 830 corresponds to a flow path member.

[0150] 14 and 15 , the fixing base 800 is provided with ports 810 and 820 that open to the mounting surface 81 and reach the main flow path 830A. The ports 810 and 820 have a cooling water inlet 820 for the flow path and an outlet 810 for discharging the cooling water from the flow path. The ports 810 and 820 are connection parts to a cooling device provided outside the high-voltage J / B 1000.

[0151] That is, the connection portion with the cooling device includes a cooling water inlet 820 for flow paths 830A, 830B, and 830C, and a cooling water outlet 810 for flow paths 830A, 830B, and 830C. It can be said that the inlets and outlets 810 and 820 and the cover member 830 constitute the cooling portion. It can also be said that the cooling portion includes the cover member 830 and the inlets and outlets 810 and 820.

[0152] For example, the inlets and outlets 810 and 820 are part of the fixed base 801 and are cylindrical portions that protrude relative to the mounting surface 81. The inlets and outlets 810 and 820 protrude in a direction perpendicular to the mounting surface 81. The inlets and outlets 810 and 820 are contained within an area facing the mounting surface 81 in the Z direction. It can also be said that the inlets and outlets 810 and 820 are provided within an area facing the mounting surface 81 in the Z direction. The inlets and outlets 810 and 820 have through holes that extend from the external space of the fixed base 800 to the flow path. Note that the fixed base 800 may have one of the inlets and outlets 810 and 820 provided on the mounting surface 81 and the other on the placement surface. In other words, the outlet 810 and the inlet 820 may be provided on different surfaces, i.e., the mounting surface 81 and the placement surface.

[0153] This allows the high-voltage J / B 1000 to easily connect and disconnect the external connection members of the cooling device to and from the ports 810 and 820. In other words, it is easy to insert and disconnect the external connection members from the ports 810 and 820. Furthermore, it is not necessary to expand the projection area of ​​the fixed base 800 in the Z direction. In other words, it is possible to prevent the high-voltage J / B 1000 from becoming too large in size in the direction along the XY plane.

[0154] That is, as shown in Comparative Example 2 in Figures 31 and 32, the high-voltage J / B may also be configured to include a fixed base 800X. The fixed base 800X has ports 810X and 820X provided in a fixed base 801X. The ports 810X and 820X protrude in a direction perpendicular to the mounting surface 81 and extend in a direction along the mounting surface 81. The ports 810X and 820X are also provided so as to reach outside the area facing the mounting surface 81 in the Z direction. Therefore, the high-voltage J / B of Comparative Example 2 is larger in size in the direction along the XY plane than the high-voltage J / B 1000.

[0155] Cooling water is introduced from the cooling device into the flow path through the inlet 820, circulates through the flow path, and is discharged to the cooling device through the outlet 810. At least one of the inlets 810 and 820 is provided on one side of one of the semiconductor relays that generates the largest amount of heat. In other words, the high-voltage J / B 1000 has the inlet 820, or both the inlet 820 and the outlet 810, located on one side of one of the semiconductor relays that generates the largest amount of heat.

[0156] The amount of heat generated by a semiconductor relay is greater than that generated by a mechanical relay under the same energized state. Also, one of the system main relays 100, 500, which is a semiconductor relay, or one of the charging relays 33, 34, which is a semiconductor relay, generates more heat than the parallel relay, which is a semiconductor relay.

[0157] Therefore, it is preferable that at least one of the ports 810 and 820 be provided on one side of a semiconductor relay rather than a mechanical relay. Also, it is preferable that at least one of the ports 810 and 820 be provided on one side of one of the system main relays 100 and 500, which are semiconductor relays, or one of the charging relays 33 and 34, which are semiconductor relays, rather than a parallel relay.

[0158] As the cooling water flows downstream, it receives heat not only from heat-generating elements such as semiconductor relays but also from the surrounding area, causing the water temperature to rise. In particular, when the cooling water flows in series to cool heat-generating elements, the rise in water temperature downstream becomes significant, resulting in a decrease in cooling efficiency. Cooling heat-generating elements with a large heat generation capacity immediately upstream after the cooling water flows into the flow path can improve cooling efficiency. For this reason, it is preferable to provide the inlet 820 on one side of the semiconductor relay that generates a large amount of heat.

[0159] For example, by providing the inlet 820 on one side of one of the system main relays 100, 500, which are semiconductor relays, or on one side of one of the charging relays 33, 34, which are semiconductor relays, cooling can be performed immediately upstream of the flow path, thereby improving cooling efficiency. Also, by providing the inlet 820 on one side of the parallel relay, which is a semiconductor relay, cooling efficiency can be improved compared to a configuration in which the inlet 820 is provided on one side of the mechanical relay.

[0160] As shown in Figures 19 and 20, branch flow paths 830B and 830C are provided in areas facing the cooling targets. Therefore, parallel flow paths are formed in the high-voltage J / B 1000. It can be said that the cooling unit forms cooling paths that distribute cooling water in parallel to each cooling target. It can be said that the fixing base 800 has paths that distribute cooling water in parallel to the cooling target devices.

[0161] The objects to be cooled here are the negative side second switching relay 200, the positive side second switching relay 400, and the positive side system main relay 500. In this embodiment, a semiconductor relay is used as an example of the object to be cooled. The negative side second switching relay 200, the positive side second switching relay 400, and the positive side system main relay 500 correspond to the devices to be cooled.

[0162] By using the high-voltage J / B 1000 as a cooling path that distributes cooling water in parallel, the temperature of the cooling water distributed to each cooling object and flowing in can be made equivalent to the temperature of the water at the time of introduction. In other words, the high-voltage J / B 1000 can make the temperature of the cooling water flowing from the main flow path 830A into the branch flow path 830B equivalent to the temperature of the cooling water introduced into the inlet 820. This ensures a large temperature difference between the object temperature and the cooling water temperature, improving cooling efficiency.

[0163] 20 , the device to be cooled is preferably mounted on a fixed base 800 so as to be in contact with the cooling water. For example, the positive electrode side second switching relay 400 is fixed to the fixed base 800 (fixed base 801) via a fixed part 400F mainly composed of metal. The fixed part 400F is fixed to the fixed base 800 in a state in contact with the cooling water. The fixed part 400F is also fixed via an annular gasket 840 to prevent cooling water from leaking from a gap between the fixed part 400F and the fixed base 801.

[0164] This allows the high voltage J / B 1000 to efficiently cool the positive electrode side second switching relay 400. The fixing portion 400F corresponds to a semiconductor relay fixing portion.

[0165] Here, the positive-side second switching relay 400, which is a semiconductor relay, is used as an example of the device to be cooled. However, other devices to be cooled may also be mounted on the fixing base 800 in the same manner.

[0166] On the other hand, the mechanical relay 300 and the like have lower current resistance than semiconductor relays under the same current-carrying conditions. Therefore, mechanical relays generate less heat than semiconductor relays. As shown in FIG. 21 , a space is formed between the underside of the mechanical relay 300 and the fixing base 800. In other words, the mechanical relay 300 is fixed to the fixing base 800 with a space formed between them. In other words, the high-voltage J / B 1000 is configured not to cool the mechanical relay 300. This allows the high-voltage J / B 1000 to prioritize cooling the semiconductor relay with cooling water over the mechanical relay.

[0167] The high-voltage J / B 1000 preferably increases the flow rate of the distributed cooling water for cooling the device to be cooled as the heat generation of the device increases. In other words, the fixed base 800 has a path that increases the flow rate of the cooling water as the heat generation of the device to be cooled increases. By increasing the cross-sectional area of ​​the branch flow paths, the high-voltage J / B 1000 can reduce water pressure loss due to water flow and increase the flow rate.

[0168] This allows the high-voltage J / B 1000 to efficiently cool the equipment being cooled without unnecessarily increasing the circulation flow rate of the cooling water. Increasing the circulation flow rate increases the pump capacity of the cooling device, which can lead to concerns about the weight, size, and cost of the cooling device. The high-voltage J / B 1000 can alleviate these concerns.

[0169] The power storage device includes the battery device 2 configured as described above and the high-voltage J / B 1000. As shown in Figures 22 and 23, the battery device 2 and the high-voltage J / B 1000 are disposed adjacent to each other and are electrically connected to each other.

[0170] The high-voltage J / B 1000 connects the first battery 2A and the second battery 2B in series by turning on the first switching relay 300 and turning off the negative side second switching relay 200 and the positive side second switching relay 400. The high-voltage J / B 1000 also connects the first battery 2A and the second battery 2B in parallel by turning off the first switching relay 300 and turning on the negative side second switching relay 200 and the positive side second switching relay 400. The high-voltage J / B 1000 is configured to be able to change the output voltage from the battery device 2 to the power conversion device 2000 by switching between the series connection and the parallel connection.

[0171] <Modification 1> As shown in Fig. 25, the high-voltage J / B 1001 of Modification 1 can also be applied to a battery device 2 having a different arrangement from that of the eighth embodiment. The battery units 2A1, 2A2, 2B1, and 2B2 are arranged along the X direction. The battery device 2 is arranged in the following order: battery unit 2B2, battery unit 2B1, battery unit 2A1, and battery unit 2A2. The battery units 2A1 and 2B1 are arranged such that the positive pole side of one of the battery units 2A1 and 2B1 is adjacent to the negative pole side of the other. The high-voltage J / B 1001 can achieve the same effects as the high-voltage J / B 1000.

[0172] 26 , a fixing base 800 may have a heat transfer body 850 that forms part of a flow path disposed on the underside of the mechanical relay 300. The heat transfer body 850 may be thermally connected to the mechanical relay or a bus bar connected to the mechanical relay.

[0173] The mechanical relay thermally connected to the heat transfer body 850 can also be considered as a cooling target device. It is preferable that at least one of the multiple mechanical relays is thermally connected to the heat transfer body 850 as a cooling target device.

[0174] The flow path member includes a heat transfer body 850 that is mainly made of metal and is in contact with the cooling water. The heat transfer body 850 is a metal plate or the like that is mainly made of metal. The heat transfer body 850 is insert-molded into the fixed base 801, for example.

[0175] The mechanical relay generates heat, although not as much as the semiconductor relay. The mechanical relay can be cooled by thermally connecting the mechanical relay to the heat conductor 850. Heat may be transferred to the heat conductor via a bus bar connected to the mechanical relay. The semiconductor relay may also be thermally connected to the heat conductor 850.

[0176] <Modification 3> As shown in Fig. 27, the high voltage J / B 1002 of modification 3 includes a cover member 830. The cover member 830 includes flow path forming portions 831, 8321, 8322, and 8323. That is, the flow path forming portions 8321, 8322, and 8323 are provided as portions that form a main flow path 830A that mainly discharges the cooling water. Fig. 27 is a plan view corresponding to Fig. 19.

[0177] As a result, a flow path for serially cooling the devices to be cooled is formed in the fixing base 800. The flow path for serially cooling the devices to be cooled can also be referred to as a serial flow path. It can be said that the fixing base 800 has a path for distributing cooling water to the devices to be cooled in series.

[0178] The high-voltage J / B 1002 allows the flow rate of cooling water flowing to each cooling object to be the same as the flow rate at the time of introduction. Therefore, the high-voltage J / B 1002 improves the heat transfer coefficient and cooling efficiency. The high-voltage J / B 1002 can achieve the same effects as the high-voltage J / B 1000.

[0179] <Modification 4> As shown in Figures 28, 29, and 30, the high-voltage J / B 1003 of Modification 3 may have ports 810A and 820A that open to the mounting surface side. As shown in Figures 28 and 30, the cover member 830 has a flow path forming portion 831A with an outlet 810A and a flow path forming portion 832A with an inlet 820A. As shown in Figure 29, the fixing base 800 does not have a port on the mounting surface 81. The high-voltage J / B 1003 can achieve the same effects as the high-voltage J / B 1000.

[0180] Although the present disclosure has been described with reference to the embodiments, it is understood that the present disclosure is not limited to the embodiments or structures. The present disclosure also encompasses various modifications and modifications within the scope of equivalents. In addition, although various combinations and forms are shown in the present disclosure, other combinations and forms including only one element, more, or less than one element are also within the scope and spirit of the present disclosure.

[0181] (Disclosure of Technical Ideas) This specification discloses multiple technical ideas described in the following multiple clauses. Some clauses may be described in a multiple dependent form, where the subsequent clause alternatively refers to the preceding clause. Some clauses may be described in a multiple dependent form, where the subsequent clause refers to another multiple dependent clause. These multiple dependent clauses define multiple technical ideas.

[0182] (Technical Idea 1) An equipment module (10) electrically connecting a power supply device (2) including a first battery (2A) and a second battery (2B) to an external charger (6), the equipment module comprising: a positive-side first switch (33) connected to a positive electrode of the power supply device and the external charger, and a negative-side first switch (34) connected to a negative electrode of the power supply device and the external charger, the first switches (33, 34) controlling the conduction of electricity between the power supply device and the external charger; and an electric device (24, 25, 53, 54, 90) that is in a non-conductive state when the positive-side first switch and the negative-side first switch are in a conductive state, with respect to an arrangement direction (X) in which the positive-side first switch and the negative-side first switch are arranged.

[0183] (Technical Idea 2) The equipment module according to Technical Idea 1 further comprises a second switch (26) that controls the flow of electricity between the first battery and the second battery, and the electrical equipment that is in a non-energized state when the first switch and the second switch are in an energized state is arranged between the first switch and the second switch in the arrangement direction.

[0184] (Technical Idea 3) An equipment module according to Technical Idea 2, further comprising: a first wiring (20) connecting the first battery and the second battery in series via the second switch; a second wiring (30) connected to the first wiring between the first battery or the second battery and the power conversion device (3) and connected to the external charger via the first switch; and a third wiring (50) connected to the first wiring between the first battery or the second battery and the second switch, and connected to a connection portion (41, 42) between the first wiring and the second wiring, wherein the electrical equipment comprises: a third switch (24, 25) connected to the first wiring; and a fourth switch (53, 54) connected to the third wiring, wherein at least one of the third switch and the fourth switch is arranged between the second switch and the first switch in the arrangement direction.

[0185] (Technical Idea 4) An equipment module according to Technical Idea 3, in which the third wiring and a portion of the first wiring form a closed loop via the first battery or the second battery, the second switch, and the fourth switch.

[0186] (Technical Idea 5) The equipment module according to Technical Idea 3 or 4, wherein the fourth switch has a positive side fourth switch (54) connected to the positive pole of the external charger and a negative side fourth switch (53) connected to the negative pole of the external charger, wherein the positive side first switch and the negative side first switch are provided on opposite sides via the second switch, wherein one of the positive side fourth switch and the negative side fourth switch is provided between the positive side first switch and the second switch, and wherein the remaining one of the positive side fourth switch and the negative side fourth switch is arranged between the negative side first switch and the second switch.

[0187] (Technical Idea 6) The equipment module according to any one of Technical Ideas 3 to 5, wherein the third switch has a positive side third switch (24) connected to the positive electrode of the power conversion device and a negative side third switch (25) connected to the positive electrode of the power conversion device, the positive side third switch and the negative side third switch are provided on opposite sides via the second switch, one of the positive side third switch and the negative side third switch is provided between the positive side first switch and the second switch, and the remaining one of the negative side third switch is arranged between the negative side first switch and the second switch.

[0188] (Technical Idea 7) An equipment module according to any one of Technical Ideas 3 to 6, in which the fourth switch is arranged next to the second switch in the arrangement direction, the third switch is arranged next to the fourth switch in the arrangement direction, and the first switch is arranged next to the third switch in the arrangement direction.

[0189] (Technical Idea 8) An equipment module according to any one of Technical Ideas 3 to 7, further comprising a fixed base (80) to which the first switch, the second switch, the third switch, and the fourth switch are fixed in a first direction (Z) of orthogonal directions perpendicular to the alignment direction, the second switch and the fourth switch are arranged so that a portion of each switch does not face each other in the alignment direction, the second switch and the fourth switch have legs (26A, 26B, 53A, 53B, 54A, 54B) fixed to the fixed base, and the legs of the second switch and the fourth switch are arranged so as to overlap in a second direction (Y) of the orthogonal directions that is different from the first direction.

[0190] (Technical Idea 9) An equipment module according to Technical Idea 1, comprising a first switching relay (300) connected to the first battery and the second battery, wherein the first battery and the second battery connected to the first switching relay are arranged such that one positive electrode side and the other negative electrode side of the first battery and the second battery are adjacent to each other, and the first switching relay is arranged between imaginary straight lines (VS1, VS2) along the opposite surfaces (OS1, OS2) of the opposing surfaces (FS1, FS2) of the first battery and the second battery.

[0191] (Technical Idea 10) An equipment module according to Technical Idea 9, comprising second switching relays (200, 400), at least one of which is a semiconductor relay having a relay unit (200S, 400S) made of a semiconductor.

[0192] (Technical Idea 11) An equipment module according to Technical Idea 10, comprising two system main relays (100, 500), one of which is a semiconductor relay having a relay section (100S, 500S) made of a semiconductor.

[0193] (Technical Concept 12) The device module according to Technical Concept 11, wherein either the positive side first switch or the negative side first switch is a semiconductor relay having a relay unit made of a semiconductor.

[0194] (Technical Idea 13) An equipment module according to Technical Idea 12, wherein the terminals directly extending from the relay unit made of the semiconductor are located on the near side relative to the connection parts with other current-carrying members when viewed from the direction in which the relay unit is stored in the fixed base.

[0195] (Technical Idea 14) An equipment module according to Technical Idea 12, wherein a fixing base to which the semiconductor relay is fixed has a cooling section including a flow path member that forms a path for cooling water and at least two connection parts for introducing and discharging the cooling water, the connection parts including an inlet for the cooling water to the path and an outlet for the cooling water to the path, and the inlet or both the inlet and the outlet are arranged on one side of one of the semiconductor relays that generates the greatest amount of heat.

[0196] (Technical Concept 15) The equipment module according to Technical Concept 14, wherein the inlet and the outlet are located within an opposing area of ​​a mounting surface of the fixing base.

[0197] (Technical Idea 16) The semiconductor relay is a device to be cooled, and is fixed to the fixing base via a fixing part (400F) for the semiconductor relay that is mainly composed of metal, and the fixing part for the semiconductor relay is fixed to the fixing base while being in contact with the cooling water. This is an equipment module described in Technical Idea 14 or 15.

[0198] (Technical Idea 17) An equipment module according to any one of Technical Ideas 14 to 16, wherein the flow path member includes a heat transfer body (850) that is primarily composed of metal and is in contact with the cooling water, the first switching relay, one of the two system main relays, and one of the positive side first switch and the negative side first switch are mechanical relays having a mechanical relay unit, and at least one of the mechanical relays is thermally connected to the heat transfer body as a device to be cooled.

[0199] (Technical Idea 18) An equipment module described in any one of Technical Ideas 14 to 17, wherein the first switching relay, one of the two system main relays, one of the positive side first switch and the negative side first switch are mechanical relays having a mechanical relay unit, and the mechanical relay is fixed to the fixed base with a space formed between it and the fixed base.

[0200] (Technical Concept 19) The equipment module according to Technical Concept 16 or 17, wherein the fixing base has the paths that distribute the cooling water in parallel to the devices to be cooled.

[0201] (Technical Concept 20) The equipment module according to Technical Concept 19, wherein the fixing base has the path such that the flow rate of the cooling water increases as the heat generation amount of the device to be cooled increases.

[0202] (Technical Concept 21) The equipment module according to Technical Concept 16 or 17, wherein the fixing base has the paths that distribute the cooling water in series to the devices to be cooled.

[0203] (Technical Idea 22) A power storage device comprising a power supply device (2) including a first battery (2A) and a second battery (2B), and an equipment module (1000-1003) electrically connected to the power supply device and a load, wherein the equipment module has at least: a pair of system main relays (100, 500) electrically connecting the power supply device and the load; a first semiconductor parallel relay (400) electrically connected to an electric wire connecting the positive electrodes of the first battery and the second battery; a second semiconductor parallel relay (200) electrically connected to an electric wire connecting the negative electrodes of the first battery and the second battery; and a series relay (300) electrically connected to one positive electrode and the other negative electrode of the first battery and the second battery, wherein the output voltage can be changed by connecting the first battery and the second battery in series or parallel, and the power storage device is such that the positive electrode side of one of the first battery and the negative electrode side of the other of the first battery and the second battery are adjacent to each other.

Claims

1. An equipment module (10) electrically connecting a power supply device (2) including a first battery (2A) and a second battery (2B) to an external charger (6), comprising: a first switch (33, 34) connected to the positive pole of the power supply device and the external charger, and a first switch (34) connected to the negative pole of the power supply device and the external charger, the first switch controlling the flow of electricity between the power supply device and the external charger; and an electrical device (24, 25, 53, 54, 90) that is in a non-conductive state when the positive side first switch and the negative side first switch are in a conductive state, wherein the electrical device is disposed between the positive side first switch and the negative side first switch in an arrangement direction (X) in which the positive side first switch and the negative side first switch are arranged.

2. The equipment module according to claim 1, further comprising a second switch (26) for controlling the flow of electricity between the first battery and the second battery, and the electrical equipment that is in a non-conductive state when the first switch and the second switch are in a conductive state is disposed between the first switch and the second switch in the arrangement direction.

3. The equipment module of claim 2, further comprising: a first wiring (20) connecting the first battery and the second battery in series via the second switch; a second wiring (30) connected to the first wiring between the first battery or the second battery and a power conversion device (3) and connected to the external charger via the first switch; and a third wiring (50) connected to the first wiring between the first battery or the second battery and the second switch, and connected to a connection portion (41, 42) between the first wiring and the second wiring, wherein the electrical equipment comprises: a third switch (24, 25) connected to the first wiring; and a fourth switch (53, 54) connected to the third wiring, and at least one of the third switch and the fourth switch is arranged between the second switch and the first switch in the arrangement direction.

4. The device module of claim 3, wherein the third wiring and a portion of the first wiring form a closed loop via the first battery or the second battery, the second switch, and the fourth switch.

5. The equipment module according to claim 3 or 4, wherein the fourth switch has a positive side fourth switch (54) connected to the positive pole of the external charger and a negative side fourth switch (53) connected to the negative pole of the external charger, the positive side first switch and the negative side first switch are provided on opposite sides via the second switch, one of the positive side fourth switch and the negative side fourth switch is provided between the positive side first switch and the second switch, and the remaining one of the positive side fourth switch and the negative side fourth switch is disposed between the negative side first switch and the second switch.

6. The equipment module according to claim 5, wherein the third switch has a positive side third switch (24) connected to the positive electrode of the power conversion device and a negative side third switch (25) connected to the positive electrode of the power conversion device, the positive side third switch and the negative side third switch are provided on opposite sides via the second switch, one of the positive side third switch and the negative side third switch is provided between the positive side first switch and the second switch, and the remaining one of the negative side third switches is disposed between the negative side first switch and the second switch.

7. The equipment module of claim 6, wherein the fourth switch is arranged adjacent to the second switch in the arrangement direction, the third switch is arranged adjacent to the fourth switch in the arrangement direction, and the first switch is arranged adjacent to the third switch in the arrangement direction.

8. The equipment module according to claim 7, further comprising a fixed base (80) to which the first switch, the second switch, the third switch, and the fourth switch are fixed in a first direction (Z) among orthogonal directions perpendicular to the arrangement direction, the second switch and the fourth switch are arranged so that a portion of each switch does not face each other in the arrangement direction, the second switch and the fourth switch have legs (26A, 26B, 53A, 53B, 54A, 54B) fixed to the fixed base, and the equipment module is arranged so that the legs of the second switch and the legs of the fourth switch overlap in a second direction (Y) among the orthogonal directions that is different from the first direction.

9. The equipment module of claim 1, further comprising a first switching relay (300) connected to the first battery and the second battery, the first battery and the second battery connected to the first switching relay being arranged such that one positive electrode side and the other negative electrode side of the first battery and the second battery are adjacent to each other, and the first switching relay is arranged between imaginary straight lines (VS1, VS2) along the opposite surfaces (OS1, OS2) of the opposing surfaces (FS1, FS2) of the first battery and the second battery.

10. The equipment module according to claim 9, further comprising second changeover relays (200, 400), at least one of which is a semiconductor relay having a relay section (200S, 400S) made of a semiconductor.

11. The equipment module according to claim 10, comprising two system main relays (100, 500), one of which is a semiconductor relay having a relay section (100S, 500S) made of a semiconductor.

12. The device module according to claim 11, wherein either the positive side first switch or the negative side first switch is a semiconductor relay having a relay section made of a semiconductor.

13. An equipment module as described in claim 12, wherein the terminal extending directly from the relay unit made of semiconductor is located on the near side relative to the connection portion with other conductive members when viewed from the direction in which the relay unit is stored in the fixed base.

14. The equipment module described in claim 12, wherein a fixing base to which the semiconductor relay is fixed has a cooling section including a flow path member that forms a path for cooling water and at least two connection parts for introducing and discharging the cooling water, the connection parts including an inlet for the cooling water to the path and an outlet for the cooling water to the path, and the inlet or both the inlet and the outlet are arranged on one side of one of the semiconductor relays that generates the greatest amount of heat.

15. The equipment module according to claim 14, wherein the inlet and the outlet are located within opposing areas of the mounting surface of the fixed base.

16. The equipment module described in claim 14, wherein the semiconductor relay is fixed to the fixing base as a device to be cooled via a fixing part for a semiconductor relay (400F) mainly composed of metal, and the fixing part for a semiconductor relay is fixed to the fixing base in a state in contact with the cooling water.

17. The equipment module described in claim 14, wherein the flow path member includes a heat transfer body (850) whose main component is metal and in contact with the cooling water, the first switching relay, one of the two system main relays, the positive side first switch, and one of the negative side first switch are mechanical relays having a mechanical relay unit, and at least one of the mechanical relays is thermally connected to the heat transfer body as a device to be cooled.

18. The equipment module described in claim 14, wherein the first switching relay, one of the two system main relays, the positive side first switch and the negative side first switch are mechanical relays having a mechanical relay unit, and the mechanical relay is fixed to the fixed base with a space formed between the mechanical relay and the fixed base.

19. The equipment module according to claim 16, wherein the fixed base has the paths for distributing the cooling water in parallel to the devices to be cooled.

20. The equipment module according to claim 19, wherein the fixing base has a path in which the flow rate of the cooling water increases as the amount of heat generated by the device to be cooled increases.

21. The equipment module according to claim 16, wherein the fixed base has the paths that distribute the cooling water in series to the devices to be cooled.

22. A power storage device comprising a power supply device (2) including a first battery (2A) and a second battery (2B), and an equipment module (1000-1003) electrically connected to the power supply device and a load, wherein the equipment module has at least: a pair of system main relays (100, 500) electrically connecting the power supply device and the load; a first semiconductor parallel relay (400) electrically connected to an electric wire connecting the positive electrodes of the first battery and the second battery; a second semiconductor parallel relay (200) electrically connected to an electric wire connecting the negative electrodes of the first battery and the second battery; and a series relay (300) electrically connected to one positive electrode and the other negative electrode of the first battery and the second battery, wherein the output voltage can be changed by connecting the first battery and the second battery in series or parallel, and wherein the first battery and the second battery are arranged such that one positive electrode side and the other negative electrode side of the first battery and the second battery are adjacent to each other.

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