Battery module

Abstract

To provide a battery module that prevents wireless communication from being disturbed and wireless communication from being leaked.SOLUTION: A battery stack 10 includes: a plurality of battery cells 11; a plurality of sensors 14 that individually detects physical quantities of the respective battery cells; and a plurality of individual communication units 16 that wirelessly outputs detection results of the respective sensors. Each of the individual communication units wirelessly communicates with an integrated monitoring unit 30. A plurality of battery stacks and the integrated monitoring unit are housed in a housing space of a case 50 that has electromagnetic shield performance. The housing space also houses a shield unit 70. The shield unit 70 is arranged to face a hole 51c formed in the case.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The disclosures described herein is the battery It is about modules. [Background technology]

[0002] A power supply system including a battery and a battery monitoring system is known, as shown in Patent Document 1. The battery monitoring system includes a plurality of battery monitoring devices and a battery ECU. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-61303 Summary of the Invention [Problem to be solved by the invention]

[0004] Power supply system described in Patent Document 1 Now, the battery The monitoring device and the battery ECU communicate wirelessly. Therefore, it is necessary to prevent this wireless communication from being disrupted by electromagnetic noise. It is also necessary to prevent this wireless communication from leaking and becoming electromagnetic noise for other electrical devices.

[0005] Therefore, an object of the disclosure described in this specification is to provide a battery module in which interference with wireless communication and leakage of wireless communication are suppressed. [Means for solving the problem]

[0006] One disclosure includes a battery cell (11); an individual communication unit (16) that wirelessly outputs the detection result of the battery cell; a monitoring unit (30) that wirelessly communicates with the individual communication unit; an electromagnetic shielding enclosure (50) that houses the battery cell, the individual communication unit, and the monitoring unit in a storage space; and a shield (70) disposed opposite to the non-electromagnetically shielded portions (51c, 57) of the partition walls (53-56) that partition the storage space. death, The shield has a facing portion (71) facing the non-electromagnetic shielding portion, and a leg portion (72) extending from the facing portion toward the partition wall and having its tip connected to the partition wall. . Another disclosed embodiment includes a battery cell (11); an individual communication unit (16) that wirelessly outputs the detection result of the battery cell; a monitoring unit (30) that wirelessly communicates with the individual communication unit; an electromagnetic shielding enclosure (50) that houses the battery cell, the individual communication unit, and the monitoring unit in a storage space; a shield (70) disposed opposite to the non-electromagnetically shielded portions (51c, 57) of the partition walls (53-56) that partition the storage space, At least a portion of the shield is made of conductive wire mesh . Another disclosed embodiment includes a battery cell (11); an individual communication unit (16) that wirelessly outputs the detection result of the battery cell; a monitoring unit (30) that wirelessly communicates with the individual communication unit; an electromagnetic shielding enclosure (50) that houses the battery cell, the individual communication unit, and the monitoring unit in a storage space; a flat shield (70) disposed opposite to the non-electromagnetically shielded portions (51c, 57) of the partition walls (53-56) that divide the storage space; Has, At least a portion of the shield is made of conductive wire mesh . Another disclosed embodiment includes a battery cell (11); an individual communication unit (16) that wirelessly outputs the detection result of the battery cell; a monitoring unit (30) that wirelessly communicates with the individual communication unit; an electromagnetic shielding enclosure (50) that houses the battery cell, the individual communication unit, and the monitoring unit in a storage space; a shield (70) disposed opposite to the non-electromagnetically shielded portions (51c, 57) of the partition walls (53-56) that partition the storage space, The non-electromagnetically shielded portion has a hole (51c) that connects the storage space with the outside, The non-conductive member (57) and the shield overlap in the thickness direction of the shield so as to cover the hole. . Another disclosed embodiment includes a battery cell (11); an individual communication unit (16) that wirelessly outputs the detection result of the battery cell; a monitoring unit (30) that wirelessly communicates with the individual communication unit; an electromagnetic shielding enclosure (50) that houses the battery cell, the individual communication unit, and the monitoring unit in a storage space; a flat shield (70) disposed opposite to the non-electromagnetically shielded portions (51c, 57) of the partition walls (53-56) that partition the storage space, The non-electromagnetically shielded portion has a hole (51c) that connects the storage space with the outside, The non-conductive member (57) and the shield overlap in the thickness direction of the shield so as to cover the hole. .

[0007] This prevents electromagnetic noise from entering the storage space of the electromagnetic shielding housing 50. It also prevents electromagnetic noise from interfering with wireless communication between the individual communication unit 16 and the monitoring unit 30. It also prevents wireless communication between the individual communication unit 16 and the monitoring unit 30 from leaking outside the storage space of the electromagnetic shielding housing 50.

[0008] 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. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 2 is a schematic diagram for explaining a battery module and a battery ECU. [Figure 2] 10 is a diagram illustrating one embodiment of a shielding portion. [Figure 3] 10 is a diagram illustrating one embodiment of a shielding portion. [Figure 4] 10 is a diagram illustrating one embodiment of a shielding portion. [Figure 5] 10 is a diagram illustrating one embodiment of a shielding portion. [Figure 6] 10 is a diagram illustrating one embodiment of a shielding portion. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments and modifications of the present disclosure will be described with reference to the accompanying drawings. These embodiments and modifications each include common elements. When a common element is described in one embodiment, the description of that common element will be omitted in other embodiments and modifications. The common element will be assigned the same reference numeral in each of the multiple embodiments and modifications.

[0011] (First embodiment) A battery module according to this embodiment will be described with reference to Fig. 1. The battery module according to this embodiment is applied to vehicles such as electric vehicles and plug-in hybrid vehicles.

[0012] <Car battery> FIG. 1 shows a battery module 100. The battery module 100 constitutes an on-board power supply. The battery module 100 serves to supply power to the electrical loads of the vehicle. Of course, the on-board power supply may be constituted by electrically connecting a plurality of battery modules 100 in series or in parallel.

[0013] The temperature of the battery module 100 is regulated by wind supplied by a fan mounted on the vehicle, or by a cooling liquid circulating inside the vehicle. This prevents excessive temperature changes in the battery module 100.

[0014] The battery module 100 can be arranged, for example, in the space under the front seats of the vehicle, the space under the rear seats, or the space between the rear seats and the trunk.

[0015] <Battery module> 1, the battery module 100 includes a plurality of battery stacks 10, an integrated monitoring unit 30, a case 50, and a shielding unit 70. The plurality of battery stacks 10, the integrated monitoring unit 30, and the shielding unit 70 are each housed in a storage space of the case 50.

[0016] <Battery stack> Each of the multiple battery stacks 10 has multiple battery cells 11, a battery case 12, and an information acquisition unit 13. The battery case 12 houses the multiple battery cells 11. The information acquisition unit 13 has the function of acquiring physical quantities of the multiple battery cells 11 and outputting them to the integrated monitoring unit 30. The information acquisition unit 13 also has the function of performing equalization processing, which will be described later.

[0017] The battery cells 11 are secondary batteries that generate an electromotive force through a chemical reaction. For example, a lithium-ion secondary battery can be used as this secondary battery. The battery cells 11 are stacked and arranged in the x direction or the z direction. The battery cells 11 are electrically connected in series. The arrangement of the battery cells 11 is maintained by a battery case 12. The battery cells 11 housed in one battery case 12 constitute one assembled battery. The assembled batteries included in each battery stack 10 are electrically connected in series. Power lines are connected to the battery stack 10 with the highest potential and the battery stack 10 with the lowest potential.

[0018] The information acquisition unit 13 has a plurality of sensors 14 that detect the physical quantities of each of the plurality of battery cells 11, an individual monitoring unit 15 that receives the detection results of these sensors 14, and an individual communication unit 16 that inputs and outputs radio signals. The sensors 14 correspond to the individual detection units.

[0019] The multiple sensors 14 include a voltage sensor, a temperature sensor, and a current sensor. The voltage sensor detects the output voltage of each of the multiple battery cells 11. The temperature sensor detects the temperature of at least one of the multiple battery cells 11. The current sensor detects the current that flows commonly through each of the multiple battery cells 11 that are electrically connected in series.

[0020] The individual monitoring unit 15 receives the detection results of the sensors 14. The individual monitoring unit 15 generates a monitoring signal that includes an identification code for identifying which of the multiple battery stacks 10 the signal was output from, along with the detection results of the sensors 14. The monitoring signal is input to the individual communication unit 16.

[0021] The individual communication unit 16 converts the input monitoring signal into a radio wave signal. This radio wave signal is output from the individual communication unit 16 to the storage space of the case 50. This radio wave signal is received by the integrated monitoring unit 30.

[0022] <Integrated Monitoring Department> The integrated monitoring unit 30 receives radio signals output from each of the multiple battery stacks 10. The integrated monitoring unit 30 converts these radio signals into digital signals. The integrated monitoring unit 30 then outputs the digital signals to the battery ECU 200. The integrated monitoring unit 30 corresponds to a monitoring unit.

[0023] The battery ECU 200 calculates the SOC of the battery module 100 based on the input digital signal. SOC stands for state of charge. The battery ECU 200 then determines whether the battery module 100 is being charged or discharged based on the detected SOC and on-board information input from other on-board ECUs, on-board sensors, etc.

[0024] The battery ECU 200 also calculates the SOC of each of the plurality of battery cells 11 included in each of the plurality of battery stacks 10. The battery ECU 200 then determines whether to perform equalization processing for the SOC of each of the plurality of battery cells 11. The battery ECU 200 outputs an instruction signal to the integrated monitoring unit 30 based on the determination of the equalization processing.

[0025] The integrated monitoring unit 30 outputs the input instruction signal as a radio signal to the storage space of the case 50. This instruction signal contains the above-mentioned identification code, so that only the individual monitoring unit 15 among the multiple individual monitoring units 15 that corresponds to the identification code contained in the radio signal receives this radio signal.

[0026] The individual monitoring unit 15 includes a switch element for individually charging and discharging each of the plurality of battery cells 11. The individual monitoring unit 15 controls the opening and closing of the switch element based on an input instruction signal, thereby electrically connecting specific battery cells 11 among the plurality of battery cells 11.

[0027] Of the plurality of electrically connected battery cells 11, a current flows from a battery cell 11 with a relatively high SOC to a battery cell 11 with a relatively low SOC. As a result, the SOCs of the plurality of battery cells 11 are equalized.

[0028] The SOC of each of the plurality of battery cells 11 included in one battery stack 10 may be calculated by an individual monitoring unit 15 included in the battery stack 10. The individual monitoring unit 15 may then determine whether to perform equalization processing of the SOC of each of the plurality of battery cells 11.

[0029] <Case> The case 50 has a housing 51 with an opening and a lid 52 fixed to the housing 51 in a manner that closes the opening. The housing 51 has a bottom wall 53 and a side wall 54 that stands upright in an annular shape from the bottom wall 53. The lid 52 has a top wall 55 that faces the bottom wall 53 but is spaced apart from it, and an edge wall 56 that stands upright in an annular shape from the top wall 55 and extends to the tip end of the side wall 54. The tip end of the side wall 54 and the tip end of the edge wall 56 are connected to each other. This defines the storage space of the case 50. The bottom wall 53, side wall 54, top wall 55, and edge wall 56 each serve as partition walls.

[0030] A hole 51c is formed in the housing 51 to connect the storage space defined by the housing 51 and the lid 52 with the space outside (external space). The hole 51c opens to the inner wall surface 51a and the outer wall surface 51b of the housing 51.

[0031] The hole 51c can be used for ventilation of the case 50, for extracting power lines, for extracting signal lines, etc. In Figure 1, the hole 51c for extracting the signal line 201 that connects the integrated monitoring unit 30 and the battery ECU 200 is shown as a representative example.

[0032] As described above, wireless communication is performed between the information acquisition unit 13 of each of the multiple battery stacks 10 and the integrated monitoring unit 30 in the storage space of the case 50. To prevent the battery module 100 from becoming a source of electromagnetic noise, it is necessary to prevent this wireless communication from leaking outside the storage space of the case 50. Conversely, to prevent this wireless communication from being obstructed, it is necessary to prevent electromagnetic noise from entering the storage space of the case 50.

[0033] To solve this problem, each of the housing 51 and the cover 52 has the ability to shield electromagnetic waves. The case 50 including the housing 51 and the cover 52 corresponds to an electromagnetically shielding housing. In order to have such electromagnetic shielding ability, the housing 51 and the cover 52 are made of the materials shown below as examples.

[0034] For example, the housing 51 and the lid 52 include a conductive material such as metal. The housing 51 and the lid 52 include a resin material and a conductive material covering the surface. The housing 51 and the lid 52 include a resin material and a conductive material embedded therein. The housing 51 and the lid 52 include carbon fiber.

[0035] However, even if the housing 51 and the cover 52 have the above-mentioned electromagnetic shielding performance, as described above, holes 51c are formed in the housing 51 for various purposes. These holes 51c correspond to non-electromagnetically shielded portions of the housing 51. There is a risk that wireless communication between the information acquisition unit 13 and the integrated monitoring unit 30 will leak out of the storage space through these holes 51c. There is also a risk that electromagnetic noise will enter the storage space of the case 50 through these holes 51c.

[0036] <Shielding parts and their effects> To solve this problem, the shielding portion 70 is housed in the housing space of the case 50. In the following, the three directions that are orthogonal to one another will be referred to as the x direction, the y direction, and the z direction.

[0037] The shielding portion 70 has an electromagnetic shielding function. To provide this function, the shielding portion 70 is made of a conductive material. The shielding portion 70 can be made of a thin metal plate, wire mesh, metal tape, a non-conductive material with a conductive material applied to its surface, a plate made of conductive fiber, or the like. The shielding portion 70 corresponds to a shield.

[0038] 1, the shielding portion 70 is disposed opposite the hole 51c in the storage space of the case 50. The shielding portion 70 has a flat shape with a small thickness in the y direction. The distance between the shielding portion 70 and the hole 51c in the y direction is shorter than, for example, the length of the shielding portion 70 in a direction perpendicular to the y direction.

[0039] All of the holes 51c are included within a projection area of ​​the shielding portion 70 on the side of the side wall 54 along the y direction where the holes 51c are not formed. A part of the shielding portion 70 faces the holes 51c, and the remainder faces the part of the side wall 54 where the holes 51c are not formed.

[0040] Due to this arrangement, the shielding portion 70 prevents wireless communication from leaking out of the storage space through the hole 51c. Even if electromagnetic noise enters the storage space through the hole 51c, part of the electromagnetic noise can be reflected out of the storage space by the shielding portion 70. Furthermore, part of the electromagnetic noise can be attenuated by being repeatedly reflected between the shielding portion 70 and a portion of the side wall 54 where the hole 51c is not formed.

[0041] The shielding portion 70 may be manufactured integrally with the housing 51, or may be manufactured separately. If the two are manufactured separately, the shielding portion 70 is connected to the housing 51 by welding, bolting, or the like. As a conductive material having the ability to reflect electromagnetic waves as an electromagnetic shielding function, for example, iron or aluminum can be used.

[0042] <Shape of shielding part> In the following, suitable shapes that can be adopted as the shape of the shielding portion 70 will be described with reference to FIGS.

[0043] When a metal plate is used as the shielding portion 70, as shown in Fig. 2, for example, the shielding portion 70 has a facing portion 71 disposed opposite the hole 51c, and a leg portion 72 extending from the facing portion 71 to a portion of the side wall 54 where the hole 51c is not formed. In Fig. 2(b), a dashed line is drawn at the boundary between the facing portion 71 and the leg portion 72 to distinguish them from each other.

[0044] The facing portion 71 has a flat plate shape with a thin thickness in the y direction. The facing portion 71 has two ends aligned in the z direction and two ends aligned in the x direction. Leg portions 72 stand up in the y direction from each of three of these four ends, except for one end located on the integrated monitoring unit 30 side in the z direction. This allows the leg portions 72 to form an annular shape with a gap in the circumferential direction around the y direction. The tip sides of the leg portions 72 are connected to the side wall 54. The tip sides of the leg portions 72 partially surround the hole 51c in the circumferential direction around the y direction.

[0045] To explain the shape of the leg portion 72 more specifically, as shown in column (a) of Figure 2, the leg portion 72 is curved in such a manner that it gradually moves away from the space between the opposing portion 71 and the side wall 54 as it moves from the end of the opposing portion 71 toward the side wall 54.

[0046] With this configuration, the leg portions 72 prevent electromagnetic noise that has entered the space between the facing portion 71 and the side wall 54 through the holes 51c from propagating toward the inside of the storage space in a direction perpendicular to the y direction. In addition, the leg portions 72 prevent wireless communications from entering the space between the facing portion 71 and the side wall 54 in a direction perpendicular to the y direction.

[0047] In addition, when the signal line 201, the power line, etc. are not passed through the hole 51c, the leg portions 72 may extend from all four ends of the facing portion 71 toward the side wall 54, as shown in FIG.

[0048] As shown in column (a) of FIG. 4, the shielding portion 70 may be configured to include a plurality of opposing portions 71 that are spaced apart in the y direction and some of which face each other in the y direction. In such a configuration, a portion of the electromagnetic noise incident on one of the opposing portions 71 is repeatedly reflected between the opposing portions 71. This attenuates the electromagnetic noise. In FIG. 4, a blocking member 57 made of a non-conductive resin material is provided in the hole 51c. The blocking member 57 corresponds to the non-conductive blocking portion.

[0049] As shown in section (b) of FIG. 4, in addition to the multiple opposing portions 71, the shielding portion 70 may also include leg portions 72 extending from each of the multiple opposing portions 71 to the side wall 54. These multiple leg portions 72 are spaced apart in the z direction, with some of them opposing each other in the z direction. The space defined by the multiple opposing portions 71 and the multiple leg portions 72 forms a labyrinth shape. Therefore, electromagnetic noise that enters the shielding portion 70 having these multiple opposing portions 71 and multiple leg portions 72 is likely to be repeatedly reflected in the labyrinth-shaped space. As a result, the electromagnetic noise is likely to be attenuated.

[0050] As shown in section (a) of FIG. 5, a metal tape that is thinner than a metal plate can be used as the shielding portion 70. The surface of the shielding portion 70 facing the side wall 54 is an adhesive surface. With this configuration, as shown in section (a) of FIG. 5, the shielding portion 70 can close the hole 51c and, for example, fix the signal line 201 to the case 50. Furthermore, the shielding portion 70 prevents a reduction in the storage capacity of the storage space of the case 50. It is also possible to prevent foreign matter from entering the storage space.

[0051] As shown in FIG. 5(b), a wire mesh that is thinner than a metal plate can be used as the shielding portion 70. The shielding portion 70 is provided at the opening of the hole 51c in the side wall 54. This prevents the shielding portion 70 from reducing the storage capacity of the storage space of the case 50. It prevents foreign matter from entering the storage space and allows communication between the storage space and the outside. The maximum diameter of the opening in the wire mesh depends on the frequency band of the radio waves used, but can be, for example, on the order of a few centimeters or less.

[0052] The shielding portion 70 may have a function of absorbing electromagnetic waves by converting input electromagnetic waves into thermal energy. For example, carbon particles can be used as a material having such a function. As shown in (a) of FIG. 6, a configuration can be adopted in which paint 73 containing such carbon particles is applied to the surface of the shielding portion 70 on the hole 51c side.

[0053] Alternatively, as shown in FIG. 6(b), for example, a configuration can be adopted in which irregularities 74 for absorbing electromagnetic waves are formed on the surface of the shielding portion 70 on the hole 51c side.

[0054] The above describes preferred embodiments of the present disclosure, but the present disclosure is not limited to the above-described embodiments and can be implemented in various modifications within the scope of the gist of the present disclosure. [Explanation of symbols]

[0055] 10...battery stack, 11...battery cell, 12...battery case, 13...information acquisition unit, 14...sensor, 15...individual monitoring unit, 16...individual communication unit, 30...integrated monitoring unit, 50...case, 51...housing, 51c...hole, 52...lid body, 53...bottom wall, 54...side wall, 55...top wall, 56...edge wall, 57...blocking member, 70...shielding portion, 71...opposing portion, 72...leg portion, 100...battery module

Claims

1. A battery cell (11); an individual communication unit (16) that wirelessly outputs the detection result of the battery cell; a monitoring unit (30) that wirelessly communicates with the individual communication unit; an electromagnetic shielding enclosure (50) that houses the battery cell, the individual communication unit, and the monitoring unit in a storage space; a shield (70) disposed opposite to the non-electromagnetically shielded portions (51c, 57) of the partition walls (53 to 56) that partition the storage space, The shielding shield has an opposing portion (71) that faces the non-electromagnetic shielding portion, and a leg portion (72) that extends from the opposing portion toward the partition wall and whose tip side is connected to the partition wall.

2. 2. The battery module according to claim 1, wherein the leg portion extends from the opposing portion toward the partition wall in a circular shape, and at least a portion of the tip end is connected to the partition wall in a manner surrounding the non-electromagnetically shielded portion.

3. A battery cell (11); an individual communication unit (16) that wirelessly outputs the detection result of the battery cell; a monitoring unit (30) that wirelessly communicates with the individual communication unit; an electromagnetic shielding enclosure (50) that houses the battery cell, the individual communication unit, and the monitoring unit in a storage space; a shield (70) disposed opposite to the non-electromagnetically shielded portions (51c, 57) of the partition walls (53 to 56) that partition the storage space, A battery module in which at least a portion of the shielding shield is a conductive wire mesh.

4. 4. The battery module according to claim 3, wherein the shielding shield has a facing portion (71) facing the non-electromagnetically shielded portion, and a leg portion (72) extending from the facing portion toward the partition wall and having its tip connected to the partition wall.

5. 5. The battery module according to claim 4, wherein the leg portion extends from the opposing portion toward the partition wall in a circular shape, and at least a portion of the tip end is connected to the partition wall in a manner surrounding the non-electromagnetically shielded portion.

6. A battery cell (11); an individual communication unit (16) that wirelessly outputs the detection result of the battery cell; a monitoring unit (30) that wirelessly communicates with the individual communication unit; an electromagnetic shielding enclosure (50) that houses the battery cell, the individual communication unit, and the monitoring unit in a storage space; a flat shield (70) disposed opposite to the non-electromagnetically shielded portions (51c, 57) of the partition walls (53 to 56) that partition the storage space, A battery module in which at least a portion of the shielding shield is a conductive wire mesh.

7. 7. The battery module according to claim 3, wherein the openings of the wire mesh have a maximum diameter of several centimeters or less.

8. 8. The battery module according to claim 3, wherein the wire mesh is thinner than the partition wall on which the wire mesh is provided.

9. The battery module according to any one of claims 1 to 8, wherein the non-electromagnetically shielded portion has a hole (51c) that connects the storage space with the outside.

10. The battery module according to any one of claims 1 to 9, further comprising a signal line (201) that passes through the non-electromagnetically shielded portion and is connected to the monitoring unit.

11. The battery module according to claim 10 , wherein the signal line is in contact with the shield.

12. 12. The battery module according to claim 1, wherein the shield is thinner than the partition wall that includes the non-electromagnetically shielded portion.

13. The battery module according to any one of claims 1 to 12, further comprising a battery case (12) for accommodating the battery cells.

14. The battery module according to any one of claims 1 to 13, comprising a plurality of assembled batteries each comprising a plurality of the battery cells.

15. the monitoring unit is an integrated monitoring unit, a plurality of individual detection units (14) that individually detect the physical quantities of the plurality of battery packs; a plurality of individual communication units that wirelessly output the detection results of the battery cells from the plurality of individual detection units; a plurality of individual monitoring units (15) that acquire detection results from the respective individual detection units, monitor the plurality of battery packs, and generate signals to be output by the corresponding individual communication units; The battery module according to claim 14 , wherein the individual monitoring unit is provided on a side surface of the assembled battery.

16. 16. The battery module according to claim 14, wherein the monitoring unit is disposed at a position facing a side surface of the battery pack.

17. 10. The battery module according to claim 9, wherein the non-conductive member (57) and the shielding shield overlap in a thickness direction of the shielding shield so as to cover the hole.

18. A battery cell (11); an individual communication unit (16) that wirelessly outputs the detection result of the battery cell; a monitoring unit (30) that wirelessly communicates with the individual communication unit; an electromagnetic shielding enclosure (50) that houses the battery cell, the individual communication unit, and the monitoring unit in a storage space; a shield (70) disposed opposite to the non-electromagnetically shielded portions (51c, 57) of the partition walls (53 to 56) that partition the storage space, The non-electromagnetically shielded portion has a hole (51c) that communicates the storage space with the outside, The non-conductive member (57) and the shielding shield overlap in the thickness direction of the shielding shield so as to cover the hole.

19. 19. The battery module according to claim 18, wherein the shielding shield has a facing portion (71) facing the non-electromagnetically shielded portion, and a leg portion (72) extending from the facing portion toward the partition wall and having a tip end connected to the partition wall.

20. 20. The battery module according to claim 19, wherein the leg portion extends from the opposing portion toward the partition wall in a circular shape, and at least a portion of the tip end is connected to the partition wall in a manner surrounding the non-electromagnetically shielded portion.

21. A battery cell (11); an individual communication unit (16) that wirelessly outputs the detection result of the battery cell; a monitoring unit (30) that wirelessly communicates with the individual communication unit; an electromagnetic shielding enclosure (50) that houses the battery cell, the individual communication unit, and the monitoring unit in a storage space; a flat shield (70) disposed opposite to the non-electromagnetically shielded portions (51c, 57) of the partition walls (53 to 56) that partition the storage space, The non-electromagnetically shielded portion has a hole (51c) that communicates the storage space with the outside, The non-conductive member (57) and the shielding shield overlap in the thickness direction of the shielding shield so as to cover the hole.

22. 22. The battery module according to claim 18, wherein at least a part of the shield is a conductive wire mesh.

23. The battery module according to claim 22, wherein the openings of the wire mesh have a maximum diameter of several centimeters or less.

24. 24. The battery module according to claim 22, wherein the wire mesh is thinner than the thickness of the partition wall on which the wire mesh is provided.

25. The battery module according to any one of claims 1 to 24, wherein the temperature of the battery cells is regulated by a fan mounted on the vehicle or a cooling liquid circulating inside the vehicle.

26. a plurality of the battery cells; 26. The battery module according to claim 1, wherein the plurality of battery cells are arranged in a horizontal direction that is perpendicular to the height direction of the electromagnetic shielding enclosure.

27. The battery module according to any one of claims 1 to 26, wherein the battery cells are applied to a vehicle.

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