Battery pack system

Abstract

To make it possible to effectively utilize a space in a pack case.SOLUTION: A battery pack system 20 comprises: a pack case 32; a plurality of battery modules 36 housed in the pack case; a plurality of radio slave apparatuses 38 wired-connected with the plurality of battery modules; a module control device 40 wired-connected with the plurality of battery modules; a master side antenna 46 for receiving radio waves from the plurality of radio slave apparatuses; and antenna wiring 48 wired-connecting the master side antenna with the module control device. The plurality of battery modules, the plurality of radio slave apparatuses, and the module control device are housed in the pack case. The master side antenna is arranged outside the pack case. At least part of the antenna wiring passes outside the pack case.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a battery pack system. [Background technology]

[0002] Patent Document 1 discloses a battery pack including a pack case, a plurality of battery modules, a plurality of slave modules, a master module, and a waveguide. Patent Document 1 also discloses that the battery modules, the master module, a battery cutoff unit, etc. are mounted on the lower plate of the pack case. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2023-504158 Summary of the Invention [Problem to be solved by the invention]

[0004] When the master module is arranged inside the pack case, the space inside the pack case is constrained, and it is desired to make effective use of the space inside the pack case.

[0005] Therefore, an object of the present disclosure is to make effective use of the space inside the pack case. [Means for solving the problem]

[0006] The battery pack system of the present disclosure includes a pack case, a plurality of battery modules housed in the pack case, a plurality of wireless slave devices connected by wire to the plurality of battery modules, a module control device connected by wire to the plurality of battery modules, a master antenna that receives radio waves from the plurality of wireless slave devices, and antenna wiring that wire-connects the master antenna and the module control device, wherein the plurality of battery modules, the plurality of wireless slave devices, and the module control device are housed in the pack case, the master antenna is positioned outside the pack case, and at least a portion of the antenna wiring passes outside the pack case. [Effects of the Invention]

[0007] According to the present disclosure, the space inside the pack case can be used effectively. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic diagram showing a battery pack system assembled in a vehicle according to an embodiment. [Figure 2] FIG. 2 is a perspective view showing the battery pack system. [Figure 3] FIG. 3 is a schematic plan view showing the battery pack system. [Figure 4] FIG. 4 is a schematic side view showing the battery pack system. [Figure 5] FIG. 5 is an explanatory diagram showing an example of the removal and installation of the battery pack. DETAILED DESCRIPTION OF THE INVENTION

[0009] [Description of the embodiments of the present disclosure] First, embodiments of the present disclosure will be listed and described.

[0010] The battery pack system of the present disclosure is as follows.

[0011] (1) A battery pack system comprising: a pack case; a plurality of battery modules housed in the pack case; a plurality of wireless slave devices connected by wire to the plurality of battery modules; a module control device connected by wire to the plurality of battery modules; a master antenna that receives radio waves from the plurality of wireless slave devices; and antenna wiring that wire-connects the master antenna and the module control device, wherein the plurality of battery modules, the plurality of wireless slave devices, and the module control device are housed in the pack case, the master antenna is positioned outside the pack case, and at least a portion of the antenna wiring passes outside the pack case.

[0012] In this battery pack system, the master antenna is located outside the pack case. This makes it easy to position the master antenna in a location suitable for wireless communication with multiple wireless slave devices without taking up space inside the pack case. Furthermore, at least a portion of the antenna wiring is routed outside the pack case. This makes it difficult for the antenna wiring to take up space inside the pack case, regardless of the position of the master antenna. This allows for effective use of the space inside the pack case.

[0013] (2) In the battery pack system of (1), the module control device includes a wireless communication processing unit for performing wireless communication processing between the plurality of wireless slave devices via the parent antenna, and the antenna wiring may be an antenna wire connecting the module control device and the parent antenna.

[0014] In this case, the module control device and the parent antenna can be connected with a simple antenna wire.

[0015] (3) The battery pack system of (1) or (2) may further include an antenna connector to which the antenna wiring is connected from the outside of the pack case.

[0016] This makes it easy to handle the pack case housing the battery modules, wireless slave units, and module control device separately from the master antenna, improving the ease of attachment / detachment, maintenance, and replacement of the pack case housing the battery modules, wireless slave units, and module control device.

[0017] (4) The battery pack system of (3) may further include an external connector to which external control wiring is connected from the outside of the pack case, and the pack case may support the antenna connector and the external connector in adjacent positions.

[0018] This allows, for example, the antenna wiring and the external control wiring along the same route to be connected to adjacent antenna connectors and external connectors, further improving the ease of attachment / detachment, maintenance, and replacement of the pack case.

[0019] (5) A battery pack system according to any one of (1) to (4), further including a vehicle support part that is held on the vehicle when the pack case is removed from the vehicle, and the parent antenna may be held on the vehicle support part.

[0020] In this case, the pack case containing the battery modules, wireless slave units, and module control device can be detached from the vehicle while the master antenna remains attached to the vehicle. This allows the master antenna to continue to be used even when the battery module is replaced, reducing the maintenance costs of the battery pack system.

[0021] (6) In the battery pack system of (5), the vehicle holding component may be a protector that protects wiring passing through the outside of the pack case.

[0022] This allows the parent antenna to be held by the protector.

[0023] (7) In the battery pack system of (6), at least a portion of the antenna wiring may be arranged along the wiring.

[0024] This makes it easy to install the antenna wiring in the vehicle in the same way as the wiring protected by the protector.

[0025] [Details of the embodiments of the present disclosure] Specific examples of the battery pack system of the present disclosure will be described below with reference to the drawings. Note that the present disclosure is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope of the claims.

[0026] [Embodiment] A battery pack system according to an embodiment will be described below.

[0027] <Overall structure> FIG. 1 is a schematic diagram showing a battery pack system 20 assembled in a vehicle 10.

[0028] The vehicle 10 is an automobile powered by an electric motor, and may be a hybrid electric vehicle (HV) or a battery electric vehicle (BEV).

[0029] The vehicle 10 is equipped with electrical components 16. The electrical components 16 include, for example, an electric motor for driving the vehicle, a drive circuit such as an inverter circuit, and an electrical control unit.

[0030] A battery pack system 20 is assembled to a vehicle 10. The battery pack system 20 is a system including a battery pack 30. The battery pack 30 is an energy source that supplies electric energy to an electric motor. The battery pack 30 is supported, for example, on the underside of the floor 12. For example, the battery pack 30 is supported on the underside of the floor 12 between the front wheels 13 and the rear wheels 14.

[0031] Underfloor wiring 22 is arranged under the floor 12. The underfloor wiring 22 includes a plurality of linear transmission members. The linear transmission members are, for example, covered electric wires, coaxial cables, or flat cables. The linear transmission members are power lines, signal lines, or earth wires. In each of the figures from FIG. 1 onward, wiring shown as a single line may actually include a plurality of linear transmission members.

[0032] The underfloor wiring 22 is routed, for example, between the floor 12 and the battery pack 30 along the front-to-rear direction. The underfloor wiring 22 connects, for example, an electrical component 16 disposed in the front portion of the vehicle 10 with an electrical component 16 disposed in the rear portion of the vehicle 10.

[0033] In addition, a portion of the underfloor wiring 22 branches off from the other underfloor wiring 22 in the middle of the vehicle 10 in the longitudinal direction. The branched underfloor wiring 22 is connected to the battery pack 30 and to a main antenna 46, which will be described later.

[0034] <About the battery pack system> Fig. 2 is a perspective view showing the battery pack system 20. In Fig. 2, the floor 12 is indicated by a two-dot chain line. Fig. 3 is a schematic plan view showing the battery pack system 20. Fig. 4 is a schematic side view showing the battery pack system 20.

[0035] The battery pack system 20 includes a pack case 32, a plurality of battery modules 36, a plurality of slave devices 38 serving as wireless terminals, a module control device 40, a master antenna 46, and antenna wiring 48.

[0036] The pack case 32 is a case that houses the battery modules 36. The pack case 32 may be formed in the shape of a rectangular parallelepiped that is flat in the vertical direction.

[0037] For example, the pack case 32 includes a case body 33 and a cover 34. The case body 33 is formed in the shape of a flat rectangular parallelepiped that is open at the top. The case body 33 may be made of metal.

[0038] The cover 34 is formed in a plate shape that can close the upper opening of the case body 33. For example, the cover 34 is formed in a rectangular plate shape. The cover 34 is preferably made of resin. A positioning protrusion 34p may be formed on the cover 34. For example, the positioning protrusion 34p is formed in the center of the cover 34 in the width direction.

[0039] With the cover 34 closing the upper opening of the case body 33, the cover 34 is fixed to the case body 33 by screws or the like. The pack case 32 is fixed to the floor 12 by screws or the like.

[0040] The battery module 36 includes a case and a plurality of battery cells housed within the case. The plurality of battery cells are connected in series or parallelepiped within the case. The case is formed, for example, in the shape of a rectangular parallelepiped box. The plurality of battery modules 36 are housed within the pack case 32 in a state where they are arranged vertically and horizontally.

[0041] The battery module 36 includes monitoring sensors that monitor the states of the battery cells, such as a temperature sensor that detects the temperature of the battery cells and a voltage sensor that monitors the voltage of the battery cells.

[0042] The slave device 38, which serves as a wireless child device, is connected by wire to the battery module 36. More specifically, the slave device 38 is a wireless terminal device that is connected by wire to a monitoring sensor in the battery module 36. The slave device 38 wirelessly outputs the detection results of the monitoring sensor in the battery module 36.

[0043] The slave devices 38 may be associated with the battery modules 36 in a one-to-one relationship, or in a one-to-multiple or multiple-to-one relationship. The slave devices 38 may be housed inside the case of the battery module 36 or may be attached to the outside of the case.

[0044] The module control device 40 is connected to the plurality of battery modules 36 by wire. For example, the module control device 40 is connected to the plurality of battery modules 36 by wire via a power line 36a and a ground line 36b. The module control device 40 may have a disconnection / switching function for disconnecting the plurality of battery modules 36 from the electrical components 16 of the vehicle 10 and for switching the power supply path. The module control device 40 may also have a function for monitoring the status of the plurality of battery modules 36 by wirelessly communicating with a slave device 38. The status of the plurality of battery modules 36 may be used for determination processing for disconnection / switching, or may be used by an electric control unit that performs overall control of the battery modules 36.

[0045] The master antenna 46 is an antenna that receives wireless signals from the multiple slave devices 38. The antenna wiring 48 is a wiring that connects the master antenna 46 and the module control device 40 by wire.

[0046] In other words, the power supply path including the power line 36a and the ground line 36b is connected by wire between the module control device 40 and the multiple battery modules 36. A signal circuit that turns the power supply path on and off may also be connected by wire between the module control device 40 and the multiple battery modules 36. To easily connect the module control device 40 to the multiple battery modules 36 and to incorporate the module control device 40 into the pack case 32, it is preferable to house the module control device 40 inside the pack case 32 rather than outside the pack case 32.

[0047] Furthermore, the signal path for receiving the results of the monitoring sensors that monitor the battery modules 36 between the module control device 40 and the multiple battery modules 36 is partially wireless. By partially wirelessly configuring the signal path for receiving the results of the monitoring sensors, the individual signal paths connecting the module control device 40 and the multiple battery modules 36 are simplified, and the configuration of the battery pack 30 is simplified.

[0048] As described above, when the battery modules 36 are arranged in rows and columns within the pack case 32, it is assumed that the slave devices 38 are also arranged in rows and columns and dispersed within the pack case 32. In this manner, a configuration in which the plurality of battery modules 36, the plurality of slave devices 38, and the module control device 40 are housed within the pack case 32 may be referred to as a battery pack 30.

[0049] The master antenna 46 is disposed in a position suitable for communication with the multiple slave devices 38. For example, the master antenna 46 is assumed to be disposed in the center of the pack case 32 in a plan view.

[0050] Here, it is assumed that the module control device 40 is also connected by wire to the electric control unit 18 that performs overall control of the battery modules 36. The electric control unit 18 that performs overall control of the battery modules 36 is, for example, a PCM (Power-Train Control Module). To facilitate external wiring from the module control device 40, the module control device 40 is considered to be positioned within the pack case 32 in a location that allows it to contact as wide an area as possible with one of the side surfaces. In FIG. 3 , the module control device 40 is positioned near one corner within the pack case 32. If the master antenna were integrated with the module control device 40, the master antenna would be positioned near one corner within the pack case 32. In this case, the communication distance with the battery module 36 located near the opposite corner would be long.

[0051] Also, let us consider the case where the master antenna is separated from the module control device 40 and placed inside the pack case 32. In this case, the master antenna and module control device 40 are connected by antenna wiring, and the master antenna is placed in a position suitable for communication. In this case, a space suitable for installing the master antenna and the antenna wiring must be secured inside the pack case 32, and the antenna wiring must be installed inside the pack case 32.

[0052] In Patent Document 1, a waveguide is used to form a wireless communication path between a plurality of slave modules and the master module. In Patent Document 1, the waveguide increases the size of the battery pack and makes the configuration more complex.

[0053] Therefore, the master antenna 46 is disposed outside the pack case 32. This eliminates the need to reserve space inside the pack case 32 for disposing the master antenna 46.

[0054] At least a portion of the antenna wiring 48 connecting the parent antenna 46 and the module control device 40 can be laid so as to pass outside the pack case 32. This makes it less likely that the antenna wiring 48 will take up space within the pack case 32. Furthermore, compared to when the antenna wiring is incorporated within the limited space within the pack case 32, laying the antenna wiring 48 is easier.

[0055] <About the module control device> A specific example of the module control device 40 will be described. The module control device 40 may have a router 42 as a wireless communication processing unit for performing wireless communication processing with the multiple slave devices 38 via the master antenna 46. The router 42 is a wireless router and includes a wireless communication circuit and a router processing unit. The wireless communication circuit is a circuit that performs wireless communication with the slave devices 38. The router 42 is a master wireless device that performs wireless communication with the multiple slave devices 38. The router processing unit has a function of relaying data between a network between the multiple slave devices 38 and the wireless communication circuit and a network for controlling the battery module 36 based on detection results from the multiple slave devices 38. The function for controlling the battery module 36 based on detection results from the multiple slave devices 38 is possessed by both or either of the module control device 40 and the electric control unit 18. Therefore, it is conceivable that the network for controlling the battery module 36 based on detection results from the multiple slave devices 38 includes a wired path connecting the wireless communication circuit to both or either of the module control device 40 and the electric control unit 18.

[0056] When the module control device 40 includes a router 42, an antenna wire connecting the module control device 40 and the parent antenna 46 can be used as the antenna wiring 48. For example, a coaxial cable can be used as the antenna wire. A coaxial cable is a communication cable in which, for example, an inner conductor is surrounded by an insulating layer, and the insulating layer is further covered with a cylindrical shield.

[0057] The router may be located outside the battery pack 30. For example, the master antenna 46 and the router may be integrated and located outside the battery pack 30. In this case, the router outside the battery pack 30 and the module control device may be connected via a wired communication path.

[0058] The module control device 40 may include a BDU (Battery Disconnect Unit) 44. The BDU 44 is a unit that includes a relay, a semiconductor switch, or the like, and that interrupts or switches the power path. An electric motor, a power supply circuit for charging, and the like, outside the battery pack 30, are connected to the battery module 36 via the BDU 44.

[0059] <About the connector> As described above, the module control device 40 and the parent antenna 46 are connected by the antenna wiring 48. Therefore, the battery pack 30 is provided with an antenna connector 41a to which the antenna wiring 48 is connected from the outside of the pack case 32.

[0060] The antenna connector 41a may be supported by the pack case 32 and connected to the router 42 in the module control device 40 via a conductive wire. The antenna connector 41a may be supported by the case of the module control device 40, and the module control device 40 may be able to be incorporated into the pack case 32 with the antenna connector 41a exposed to the outside. In this case, it can be said that the antenna connector 41a is supported by the pack case 32 via the case of the module control device 40.

[0061] The antenna connector 41a may be, for example, a coaxial connector. In this case, a mating coaxial connector 48a attached to the end of the antenna wiring 48, which is a coaxial cable, may be connected to the antenna connector 41a.

[0062] It is also conceivable that the module control device 40 is connected to an electric control unit 18 outside the battery pack 30. Therefore, the battery pack 30 may be provided with an external connector 41b to which the connector 19a at the end of the external control wiring 19 is connected from the outside of the pack case 32. The external connector 41b may be supported directly on the pack case 32, similar to the antenna connector 41a, or may be supported on the pack case 32 via the case of the module control device 40.

[0063] It is preferable that the pack case 32 supports the antenna connector 41a and the external connector 41b in adjacent positions.

[0064] <Wiring routes outside the battery pack> Outside the battery pack 30, the antenna wiring 48 and the external control wiring 19 may follow any route. In addition, the master antenna 46 may be supported by the battery pack 30, or may be supported by a member other than the battery pack 30.

[0065] For example, the parent antenna 46 may be supported by a vehicle support component other than the battery pack 30 .

[0066] That is, the battery pack system 20 further includes a vehicle retention component that is retained on the vehicle 10 when the pack case 32 is removed from the vehicle 10. In other words, the vehicle retention component is a component that can remain attached to the vehicle 10 even when the pack case 32 is removed from the vehicle 10.

[0067] By holding the master antenna 46 on the vehicle holding component, the master antenna 46 can remain attached to the vehicle 10 even if the battery pack 30 is removed from the vehicle.

[0068] The vehicle holding member may be, for example, a protector 50 that protects the wiring passing outside the battery pack 30.

[0069] That is, the underfloor wiring 22 is routed along the front-rear direction between the floor 12 and the battery pack 30. The underfloor wiring 22 is an example of wiring that passes outside the battery pack 30.

[0070] A protector 50 is disposed between the underfloor wiring 22 and the battery pack 30. The protector 50 is made of resin. The protector 50 is formed, for example, in a rectangular shape that is long in the front-to-rear direction. The underfloor wiring 22 is disposed on the protector 50 along the extension direction of the protector 50. The protector 50 may have an enclosing portion that surrounds the underfloor wiring 22 from the sides or from above. The protector 50 and the underfloor wiring 22 may be bound and held together by a binding member such as a cable tie.

[0071] By arranging the underfloor wiring 22 on the protector 50, the underfloor wiring 22 is protected.

[0072] The underfloor wiring 22 includes the outer control wiring 19. One end of the outer control wiring 19 extends toward the end of the protector 50 and is connected to the electric control unit 18. The other end of the outer control wiring 19 is drawn out from the protector 50 at a middle portion in the extending direction of the protector 50 and is connected to the external connector 41b.

[0073] The master antenna 46 is held by the protector 50. For example, an antenna holding portion 52 is formed in a portion of the protector 50 that is located in the center of the battery pack 30. The antenna holding portion 52 may be configured to hook around the periphery of the master antenna 46 to hold the master antenna 46. The antenna holding portion 52 may be a portion that holds the master antenna 46 to the protector 50 by adhesive, screwing, or the like.

[0074] At least a portion of the antenna wiring 48 may be arranged along the underfloor wiring 22. For example, the antenna wiring 48 extends from the master antenna 46 held by the protector 50. The portion of the antenna wiring 48 on the master antenna 46 side is arranged on the protector 50 along the underfloor wiring 22. At least a portion of the master antenna 46 may be held by the protector 50 in a similar configuration to the underfloor wiring 22.

[0075] The other end of the antenna wiring 48 is drawn out from the protector 50 at a middle portion in the extending direction of the protector 50 and connected to the antenna connector 41a.

[0076] If the antenna connector 41a and the external connector 41b are adjacent to each other in the battery pack 30, the antenna wiring 48 and the electrical control unit 18 can be routed at the same or nearby locations on the protector 50, and the connector connection work for the battery pack 30 can be easily performed on the same side.

[0077] The protector 50 may be attached to the vehicle 10 by the following configuration. Specifically, a temporary positioning hole 50h1 and a fixing hole 50h2 are formed in the protector 50. The temporary positioning hole 50h1 is a hole into which the positioning protrusion 34p of the pack case 32 is inserted. The fixing hole 50h2 is a hole into which the fixing protrusion 12p protruding from the underside of the floor 12 is inserted and fixed. The fixing protrusion 12p is, for example, a stud bolt. The fixing hole 50h2 is preferably configured to be able to fix the fixing protrusion 12p without fastening work. For example, the fixing hole 50h2 may be configured to have a locking claw that can elastically lock into a groove around the stud bolt. Alternatively, the fixing protrusion 12p may be configured to have an elastic locking claw that can be locked to the periphery of the fixing protrusion 12p while protruding from the fixing hole 50h2.

[0078] A protector 50 that holds the under-floor wiring 22 is then placed on the battery pack 30. The protector 50 also holds the outer control wiring 19 and the antenna wiring 48. The outer control wiring 19 and the antenna wiring 48 are connected to the external connector 41b and the antenna connector 41a. The positioning protrusion 34p of the battery pack 30 is inserted into the temporary positioning hole 50h1, thereby positioning the protector 50 with respect to the battery pack 30.

[0079] In this state, the battery pack 30 is lifted from below the floor 12 toward the floor 12. Then, the fixing protrusions 12p engage with the fixing holes 50h2, and the protector 50 is supported by the floor 12. The battery pack 30 is separately fixed to the floor 12 by screws or the like.

[0080] When the battery pack 30 is removed for maintenance or replacement, the external control wiring 19 and the antenna wiring 48 are disconnected from the external connector 41b and the antenna connector 41a, as shown in FIG.

[0081] Then, the battery pack 30 is removed from the floor 12 and moved below the floor 12. The protector 50 is kept fixed to the floor 12 by the fixing structure of the fixing protrusions 12p. Therefore, the battery pack 30 can be separated from the floor 12 while the outer control wiring 19, the master antenna 46, and the antenna wiring 48 remain in the protector 50 below the floor 12.

[0082] The battery pack 30 after maintenance or the replaced battery pack 30 is prepared with the outer control wiring 19, the parent antenna 46, and the antenna wiring 48 not connected.

[0083] The battery pack 30 is placed under the protector 50 and fixed to the floor 12 with screws or the like. The protector 50 holds the outer control wiring 19, the master antenna 46, and the antenna wiring 48 under the floor 12. When the outer control wiring 19 and the master antenna 46 are connected to the external connector 41b and the antenna connector 41a, respectively, the maintenance or replacement work for the battery pack 30 is completed.

[0084] <Effects, etc.> In the battery pack system 20 configured as described above, the master antenna 46 is disposed outside the pack case 32. This makes it easy to dispose the master antenna 46 in a position suitable for wireless communication with the slave device 38 without occupying space within the pack case 32. For example, it is easy to dispose the master antenna 46 in the center of the pack case 32 in a plan view. Furthermore, at least a portion of the antenna wiring 48 passes outside the pack case 32. This makes it difficult for the antenna wiring 48 to occupy space within the pack case 32, regardless of the position of the master antenna 46. This allows for effective use of the space within the pack case 32. This also makes it possible to improve the assembly work of the battery pack 30.

[0085] Furthermore, because the router 42 and the parent antenna 46 are separated, the router 42 can be placed anywhere, and for example, the module control device 40 can have the router 42. This allows the module control device 40 and the parent antenna 46 to be connected by a simple antenna wire, simplifying the configuration.

[0086] Furthermore, since the battery pack 30 includes the antenna connector 41a, it is easy to handle the battery pack 30 separately from the parent antenna 46. This improves the ease of attachment / detachment, maintenance, and replacement of the battery pack 30.

[0087] Furthermore, the battery pack 30 includes an external connector 41b, and the antenna connector 41a and the external connector 41b are adjacent to each other. Therefore, for example, the antenna wiring 48 and the external control wiring 19, which are along the same path, can be connected to the adjacent antenna connector 41a and external connector 41b, further improving the ease of attachment / detachment, maintenance, and replacement of the battery pack 30.

[0088] Furthermore, the master antenna 46 is held by a protector 50, which serves as a vehicle holding component. Therefore, the battery pack 30 can be attached and detached from the vehicle 10 while the master antenna 46 remains attached to the vehicle 10. This allows the master antenna 46 to continue to be used even if the battery pack 30 is replaced, thereby reducing the maintenance costs of the battery pack system 20.

[0089] Furthermore, since the vehicle holding component is a protector that protects the underfloor wiring 22, the master antenna 46 can be protected by the protector 50.

[0090] Furthermore, at least a portion of the antenna wiring 48 runs along the underfloor wiring 22. Therefore, the antenna wiring 48 can be easily installed in the vehicle 10 in the same manner as the underfloor wiring 22 that is protected by a protector.

[0091] [Variations] The configurations described in the above embodiment and modifications can be combined as appropriate as long as they are not mutually inconsistent. [Explanation of symbols]

[0092] 10 vehicles 12 floors 12p fixed protrusion 13, 14 wheels 16 Electrical Components 18 Electrical Control Unit 19 External control wiring 19a connector 20 Battery Pack System 22 Underfloor wiring 30 Battery Pack 32 pack case 33 Case body 34 Cover 34p Positioning protrusion 36 Battery Module 36a power line 36b Ground wire 38 Slave Devices 40 Module Control Device 41a Antenna Connector 41b External Connector 42 Router 44 BDU 46 Parent antenna 48 Antenna wiring 48a mating coaxial connector 50 Protector 50h1 temporary positioning hole 50h2 fixing hole 52 Antenna holder

Claims

1. Pack case and a plurality of battery modules housed in the pack case; a plurality of wireless slave devices connected by wire to the plurality of battery modules; a module control device connected by wire to the plurality of battery modules; a master antenna for receiving radio waves from the plurality of wireless slave devices; an antenna wiring for connecting the parent antenna and the module control device by wire; Equipped with the plurality of battery modules, the plurality of wireless slave devices, and the module control device are housed in the pack case, the parent antenna is disposed outside the pack case, A battery pack system, wherein at least a portion of the antenna wiring is routed outside the pack case.

2. 10. The battery pack system of claim 1, the module control device includes a wireless communication processing unit for performing wireless communication processing with the plurality of wireless slave devices via the master antenna, A battery pack system, wherein the antenna wiring is an antenna line that connects the module control device and the parent antenna.

3. 3. The battery pack system according to claim 1, The battery pack system further includes an antenna connector to which the antenna wiring is connected from outside the pack case.

4. 4. The battery pack system according to claim 3, an external connector to which an external control wiring is connected from the outside of the pack case; The battery pack system, wherein the pack case supports the antenna connector and the external connector in adjacent positions.

5. 3. The battery pack system according to claim 1, a vehicle support component that is supported on the vehicle when the pack case is removed from the vehicle; A battery pack system, wherein the parent antenna is held by the vehicle holding component.

6. 6. The battery pack system according to claim 5, The vehicle holding component is a protector that protects wiring passing outside the pack case.

7. 7. The battery pack system of claim 6, At least a portion of the antenna wiring is along the wiring.

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