Flexible printed wiring board module and battery cell

Abstract

Provided are a flexible printed wiring board module and a battery cell. The flexible printed wiring board module is configured to be mounted to a battery including a plurality of cells, and includes a flexible printed wiring board including a wiring, a plurality of bus bars electrically connected to the wiring, and a housing in which the flexible printed wiring board and the plurality of bus bars are mounted, the flexible printed wiring board being configured to be disposed between the battery and the housing.

Description

[0001] Cross-reference of related applications This application claims priority to Japanese Patent Application No. 2025-011638, filed with the Japan Patent Office on January 27, 2025, the entire contents of which are hereby incorporated by reference. Technical Field

[0002] This disclosure relates to flexible printed wiring board modules and battery cells. Background Technology

[0003] For monitoring the voltage or measuring the temperature of individual cells in a battery unit composed of multiple cells, a technique for incorporating a flexible printed wiring board (FPC) module into the battery unit is known. Hereinafter, the flexible printed wiring board will be referred to as an FPC. Furthermore, the flexible printed wiring board module will be referred to as an FPC module. See below for reference. Figure 13A And 13B describes the battery cell used in the reference example. Figure 13A This is a top view of the battery cell used in the reference example. Figure 13B This is a bottom view of the FPC module used in the reference example.

[0004] The battery cell used in the reference example includes: a battery 10 comprising a plurality of individual cells 11; and an FPC module 500 mounted on the upper surface of the battery 10. The FPC module 500 includes an FPC 510. A connector 520 for connection to an external device is mounted at one end of the FPC 510. Furthermore, the FPC 510 has a plurality of wirings. Additionally, the FPC 510 has a plurality of connection terminals 530. Each connection terminal 530 is connected to one of the corresponding plurality of wirings. The FPC module 500 also includes: a plurality of busbars 540 engaging with the individual cells 11; and a housing 550 mounting the plurality of busbars 540 and the FPC 510. Mounting holes 551 are provided in the housing 550 for mounting the plurality of busbars 540 to the housing 550. Moreover, each busbar 540 is fixed to one of the corresponding plurality of connection terminals 530.

[0005] The aforementioned busbar 540 is joined to the unit 11 by welding. During welding, the busbar 540 is welded to the unit 11 from the side opposite to the unit 11, for example, by laser welding. Spatter is generated during the welding process to fix the busbar 540 to the unit 11. Therefore, the FPC 510 may be damaged due to the flying spatter. Therefore, the FPC module 500 used in the reference example is provided with a cover 560 made of resin or the like. Figure 13AIn the diagram, cover 560 is shown in thick lines. Parts of FPC 510 that are hidden in the top view are shown in perspective and indicated by dashed lines. As can be seen from this diagram, FPC 510 is covered by cover 560. Therefore, even if splashes occur as described above, collisions between splashes and FPC 510 can be suppressed. By adopting the above configuration, damage to FPC 510 caused by splashes can be suppressed.

[0006] However, with the configuration described above, a cover 560 is required. Therefore, the number of components increases. Consequently, the thickness of the FPC module 500 increases. Furthermore, the weight of the FPC module 500 also increases.

[0007] Furthermore, the FPC module 500 sometimes includes a function to measure the temperature of the individual cell 11 (with a structure including a thermistor element). In this case, for example, a foldable part is provided in the housing. Moreover, this part is folded. Thus, a structure is adopted that presses the thermistor element toward the individual cell. However, adopting such a structure results in a further increase in the size of the housing. Summary of the Invention

[0008] The purpose of this embodiment is to provide a flexible printed wiring board module and a battery unit that can reduce the number of components and miniaturize the device, and can suppress damage to the flexible printed wiring board. The flexible printed wiring board module of the embodiment is configured to be installed in a battery comprising multiple cells. The flexible printed wiring board module includes a flexible printed wiring board, multiple busbars, and a housing. The flexible printed wiring board includes wiring, and the multiple busbars are electrically connected to the wiring. The flexible printed wiring board and the multiple busbars are installed in the housing. The flexible printed wiring board is configured to be disposed between the battery and the housing.

[0009] In this embodiment, the following technical solution is adopted to solve the above problems.

[0010] That is, the flexible printed wiring board module of this embodiment is configured to be installed in a battery comprising multiple individual cells. The flexible printed wiring board module includes a flexible printed wiring board, multiple busbars, and a housing. The flexible printed wiring board includes wiring, and the multiple busbars are electrically connected to the wiring. The flexible printed wiring board and the multiple busbars are installed in the housing. The flexible printed wiring board is configured to be disposed between the battery and the housing.

[0011] According to this embodiment, a flexible printed wiring board can be disposed between the battery and the housing. The flexible printed wiring board is covered by the housing. Therefore, even if spatter is generated when the busbar is soldered to the cell, the housing can suppress the collision between the spatter and the flexible printed wiring board.

[0012] Alternatively, the housing may have multiple mounting holes, with the multiple busbars fixed to one of the corresponding mounting holes, and the flexible printed wiring board fixed to the housing at multiple locations by thermal riveting.

[0013] Therefore, when the flexible printed wiring board module is installed in the battery, even if the flexible printed wiring board is positioned on the underside of the housing, the flexible printed wiring board will not detach from the housing or sag.

[0014] Alternatively, it may also include a reinforcing plate and a connector, with an opening formed in the housing, the flexible printed wiring board including a closing portion that closes the opening, the reinforcing plate covering the closing portion and fixed to the housing through the flexible printed wiring board, and having a higher strength than the flexible printed wiring board, and the connector disposed in the opening and installed in the closing portion.

[0015] In this way, by setting up a reinforcing plate, the connector can be properly fixed to the flexible printed wiring board.

[0016] Alternatively, a thermistor element may be disposed between the housing and the flexible printed wiring board, the thermistor element being configured to measure the temperature of the individual unit.

[0017] Therefore, the thermistor element can be set up with a simple structure. As a result, the housing can be miniaturized.

[0018] The battery unit of this embodiment includes: a battery comprising multiple individual cells; and a flexible printed wiring board module mounted on the battery. The flexible printed wiring board module includes a flexible printed wiring board, multiple busbars, and a housing. The flexible printed wiring board includes wiring, and the multiple busbars are electrically connected to the wiring. The flexible printed wiring board and the multiple busbars are mounted on the housing, and the flexible printed wiring board is disposed between the battery and the housing.

[0019] According to this embodiment, a flexible printed wiring board is disposed between the battery and the housing. Therefore, the flexible printed wiring board is covered by the housing. Thus, even when spatter is generated during the welding of the busbar to the individual unit, the housing can suppress the collision between the spatter and the flexible printed wiring board.

[0020] Furthermore, the above components can be combined in various ways as much as possible.

[0021] As explained above, according to this embodiment, it is possible to reduce the number of components and miniaturize the device, and to suppress damage to the flexible printed wiring board. Attached Figure Description

[0022] Figure 1Aas well as Figure 1B This is a schematic diagram of the battery according to this embodiment. Figure 2A And 2B is a schematic diagram of the battery cell of the first embodiment. Figure 3 This is a bottom view of the flexible printed wiring board module according to the first embodiment. Figure 4A as well as Figure 4B This is a schematic diagram of the flexible printed wiring board used in the first embodiment. Figure 5A as well as Figure 5B This is a schematic diagram of the housing used in the first embodiment. Figure 6A as well as Figure 6B This is a diagram comparing the first embodiment with the reference example. Figure 7A as well as Figure 7B This is a schematic diagram of the battery cell according to the second embodiment. Figure 8 This is a bottom view of the flexible printed wiring board module according to the second embodiment. Figure 9A as well as Figure 9B This is a schematic diagram of the flexible printed wiring board used in the second embodiment. Figure 10A as well as Figure 10B This is a schematic diagram of the housing used in the second embodiment. Figure 11 This is an explanatory diagram of the reinforcing plate used in the second embodiment. Figure 12A as well as Figure 12B This is a schematic diagram of the flexible printed wiring board module according to the third embodiment. Figure 13A This is a top view of the battery cell used in the reference example. Figure 13B This is a bottom view of the FPC module used in the reference example. Detailed Implementation In the following detailed description, numerous specific details are presented for illustrative purposes and to provide a thorough understanding of the disclosed embodiments. However, it will be apparent that one or more embodiments can be implemented without these specific details. In other instances, well-known structures and apparatuses are shown schematically for the purpose of simplifying the drawings.

[0023] Hereinafter, this embodiment will be illustratively described in detail with reference to the accompanying drawings. However, unless otherwise specifically stated, the dimensions, materials, shapes, relative configurations, etc. of the components described in this embodiment of the description are not intended to limit the technical scope of this embodiment only to these described embodiments.

[0024] (First Embodiment) Refer to Figures 1A to 5B The flexible printed circuit board module and the battery unit of the first embodiment will be described. Hereinafter, the flexible printed circuit board will be referred to as FPC. The flexible printed circuit board module will be referred to as FPC module. Figure 1A And Figure 1B is a schematic diagram of the battery used in the first embodiment. Figure 1A is a top view of the battery. Figure 1B is a side view of the battery. Figure 2A And Figure 2B is a schematic diagram of the battery unit of the first embodiment. Figure 2A is a top view of the battery unit. Figure 2B is a side view of the battery unit. Figure 3 is a bottom view of the FPC module of the first embodiment. Figure 4A And Figure 4B is a schematic diagram of the FPC used in the first embodiment. Figure 4A is a top view of the FPC. Figure 4B is a bottom view of the FPC. Figure 5A And 5B is a schematic diagram of the housing used in the first embodiment. <s Figure 5A is a top view of the housing. [[ID=XX]] Figure 5B is a bottom view of the housing.

[0025] <Summary of Battery Unit> As Figure 2B shown, the battery unit includes: a battery 10 including a plurality of cells 11; and an FPC module 100 mounted on the battery 10. The FPC module 100 is used to monitor the voltage of the cells 11.

[0026] <Battery> Electrodes (positive electrode 11a and negative electrode 11b) are provided respectively on the cells 11 constituting the battery 10. Moreover, these plurality of cells 11 are arranged such that the positive electrode 11a and the negative electrode 11b are adjacent to each other (refer to Figure 1A And Figure 1B ). In addition, among these plurality of cells, the adjacent positive electrode 11a and negative electrode 11b are electrically connected by a bus bar 140 provided in the FPC module 100. By doing so, the battery 10 is formed by connecting the cells 11 in series.

[0027] <FPC Module> FPC module 100 includes FPC 110. FPC 110 includes a plurality of wirings 111, and resin films (base film 112 and cover film 113) disposed on the upper and lower surfaces of the plurality of wirings 111. Figure 4A as well as Figure 4B In the diagram, wiring 111 is shown through and outlined with dashed lines. FPC 110 itself is a known technology; therefore, its detailed description is omitted. First, a metal foil (copper foil, etc.) on the base film 112 is etched. This forms the circuit (wiring 111). Then, a cover film 113 is applied to cover the wiring 111. A connector 120 is mounted at one end of the FPC 110 configured as described above. Furthermore, corresponding connection terminals 130 are mounted on each of the multiple wirings 111 (see reference). Figure 4A as well as Figure 4B Additionally, an opening is provided in a portion of the cover film 113. In this way, the connector 120 and each connection terminal 130 are joined to the wiring 111, for example, by soldering. Furthermore, the connector 120 is connected to an external device (ECU, etc.) for monitoring the voltage of the unit 11.

[0028] Furthermore, the FPC module 100 includes multiple busbars 140 and a resin housing 150. The busbars 140 are indirectly electrically connected to the wiring 111 of the FPC 110 via connection terminals 130. The FPC 110 and the multiple busbars 140 are mounted in the housing 150. The connection terminals 130 are joined to the busbars 140, for example, by solder. As described above, the busbars 140 connect the positive electrode 11a and the negative electrode 11b of adjacent cells 11. The busbars 140 are joined to the cells 11 (positive electrode 11a and negative electrode 11b) by welding. In welding, the busbars 140 are welded to the cells 11 from the side opposite to the cells 11, for example, by laser welding. Figure 2B The "S" in the figure indicates a welded section. Additionally, in the first embodiment, a through hole 141 is provided in the busbar 140 to facilitate identification of the welded position. However, it is not mandatory to provide a through hole 141.

[0029] The housing 150 has multiple mounting holes 151. Busbars 140 are fixed to each of these mounting holes 151. The method of fixing the mounting holes 151 and the busbars 140 is not particularly limited. For example, since it involves the engagement of a protrusion and a hole, various known techniques can be used. Furthermore, the FPC 110 is fixed to the housing 150 at multiple locations by thermal riveting. In the first embodiment, the housing 150 has multiple protrusions 152 for thermal riveting. Additionally, the FPC 110 has multiple through holes 115. The protrusions 152 are inserted into the through holes 115. Therefore, thermal riveting can be performed with the protrusions 152 inserted into the through holes 115. By doing so, the FPC 110 can be fixed to the housing 150. Furthermore, a reinforcing plate with higher rigidity than the FPC 110 can be adhered to the locations where thermal riveting is performed in the FPC 110. This makes it easier to fix the FPC 110 to the housing 150. Alternatively, the reinforcing plate can be a resin film. Or, the reinforcing plate can also be, for example, a resin sheet that is difficult to bend. Furthermore, the method of fixing the housing 150 to the FPC 110 is not limited to thermal riveting. Various known techniques such as fixing using adhesives, bonding agents, or double-sided tape can also be employed.

[0030] In the FPC module 100 configured as described above, with the FPC 110 fixed to the housing 150 and positioned facing the battery 10, a plurality of busbars 140 are joined to the battery 10 (cell 11) by welding. As described above, during welding, the busbars 140 are joined to the battery 10 from the side opposite to the cell 11, separated by the busbars 140. That is, the FPC 110 is positioned opposite the housing 150 in the welding direction from the busbars 140 to the cell 11. As described above, the FPC 110 is positioned between the battery 10 and the housing 150.

[0031] <Advantages of the FPC module and battery unit in the first embodiment> According to the first embodiment, the FPC 110 is disposed between the battery 10 and the housing 150. Therefore, the FPC 110 is covered by the housing 150 (see FIG2). Thus, even when spatter is generated during the welding of the busbar 140 to the cell 11, the housing 150 can suppress the impact of the spatter on the FPC 110. In this way, unlike conventional technology, damage to the FPC 110 can be suppressed even without a cover. Therefore, compared to conventional technology, the number of components can be reduced. Therefore, the thickness of the FPC module 100 can be reduced. Furthermore, weight can be reduced. Thus, the number of components can be reduced, the device can be miniaturized, and damage to the FPC 110 can be suppressed. Additionally, in the first embodiment, when the FPC module 100 is mounted to the battery 10, the FPC 110 faces downward from the housing 150. However, the FPC 110 is fixed relative to the housing 150. Therefore, the FPC 110 will not sag.

[0032] Furthermore, in the first embodiment, it is possible to prevent contaminants such as dust or dirt from adhering to the electronic components disposed on the FPC. This will be explained with reference to FIG6, etc. Figure 6A This is a top view of the FPC module used in the reference example. Figure 6A In the middle, the cover was removed. Figure 6B This is a top view of the FPC module in the first embodiment. Figure 6A as well as Figure 6B The diagrams show the states in which electronic component E is installed on the FPC module. For example... Figure 6A As shown, in conventional technology, the electronic component E disposed on the FPC 510 is exposed. Therefore, even when a cover 560 is installed over the FPC 510, contaminants can still enter through the gap between the FPC 510 and the cover 560. As a result, contaminants adhere to the electronic component E. In contrast, in the first embodiment, the FPC 110 and the housing 150 are thermally riveted together. Therefore, the electronic component E disposed on the FPC 110 is sealed by the FPC 110 and the housing 150. Thus, the adhesion of contaminants can be suppressed. Furthermore, Figure 4A The electronic component E mounted on the FPC110 is shown. Additionally, it is preferable that the housing 150 has a hole 153 for forming a sealed space for configuring the electronic component E (see reference). Figure 5A , Figure 5B as well as Figure 6B In this way, the FPC110 is thermally riveted to the housing 150, thereby positioning the electronic component E within the sealed space formed by the hole 153. Therefore, it is possible to more reliably suppress the adhesion of contaminants to the electronic component E.

[0033] (Second Implementation) Reference Figures 7A to 11The FPC module and the battery unit of the second embodiment of the present disclosure will be described. In the description of the above first embodiment, the configuration in which the connector is provided at the end of the FPC is shown. In contrast, in the description of the second embodiment, the configuration in which the connector is provided at the center of the FPC is shown. Figure 7A and Figure 7B is a schematic diagram of the battery unit of the second embodiment, Figure 7A is a top view of the battery unit. Figure 7B is a side view of the battery unit. Figure 8 is a bottom view of the FPC module of the second embodiment. Figure 9A and Figure 9B is a schematic diagram of the FPC and the like used in the second embodiment. Figure 9A is a top view of the FPC and the like. Figure 9B is a bottom view of the FPC and the like. Figure 10A and Figure 10B is a schematic diagram of the housing used in the second embodiment. Figure 10A is a top view of the housing. Figure 10B is a bottom view of the housing. Figure 11 is a top view of the reinforcing plate used in the second embodiment.

[0034] <Overview of the battery unit> As Figure 7B shown, the battery unit includes: a battery 10 including a plurality of cells 11; and an FPC module 200 mounted on the battery 10. The FPC module 200 is used to monitor the voltage of the cells 11. The configuration of the battery 10 is the same as that described in the first embodiment. Therefore, the description of its configuration is omitted here.

[0035] <FPC module> The FPC module 200 includes an FPC 210. The FPC 210 includes: a plurality of wirings 211; and resin films (a base film 212 and a cover film 213) provided on the upper and lower surfaces of the plurality of wirings 211. In Figure 9A and Figure 9B the wirings 211 are shown in perspective and in dashed lines. The outer shape of the FPC 210 used in the second embodiment is a rectangular ring shape. In addition, a closing portion 210X for closing an opening 253 formed in a housing 250 described later is provided in the FPC 210. Further, a connector 220 is disposed within the opening 253 and mounted on the closing portion 210X. The portion where the connector 220 is mounted is shown by a thick dashed line in Figure 9A . In addition, corresponding connection terminals 230 are respectively mounted on the plurality of wirings 211 of the FPC 210 (refer to Figure 9AAdditionally, by providing an opening in a portion of the cover film 213, the connector 220 and each connection terminal 230 are joined to the wiring 211, for example, by soldering. Furthermore, the connector 220 is connected to an external device (ECU, etc.) for monitoring the voltage of the unit 11.

[0036] Furthermore, the FPC module 200 includes multiple busbars 240 and a resin housing 250. The busbars 240 are indirectly electrically connected to the wiring 211 of the FPC 210 via connection terminals 230. The FPC 210 and the multiple busbars 240 are mounted in the housing 250. The connection terminals 230 are joined to the busbars 240, for example, by solder. As described in the first embodiment, the busbars 240 are joined to the individual cells 11 (positive electrode 11a and negative electrode 11b) by soldering. The soldering method and direction are as described in the "Method and Direction" section of the first embodiment. Figure 7B The "S" in the figure indicates a welded section. Furthermore, even in the second embodiment, a through hole 241 is provided in the busbar 240 to facilitate identification of the welded position. However, it is not mandatory to provide a through hole 241.

[0037] Multiple mounting holes 251 are provided in the housing 250. Busbars 240 are fixed to each of these mounting holes 251. Similar to the first embodiment, the method of fixing the mounting holes 251 and the busbars 240 is not particularly limited. Various known techniques can be used. In addition, the FPC 210 is fixed to the housing 250 at multiple locations by heat riveting. In the second embodiment, multiple heat riveting protrusions 252 are provided in the housing 250. Furthermore, multiple insertion holes 215 are provided in the FPC 210. The protrusions 252 are inserted into the insertion holes 215. Thus, heat riveting can be performed with the protrusions 252 inserted into the insertion holes 215. By doing so, the FPC 210 can be fixed to the housing 250. As explained in the first embodiment, a reinforcing plate with higher rigidity than the FPC 210 can be attached. By doing so, the FPC 210 can be fixed to the housing 250 more easily. The reinforcing plate can be a resin film. Alternatively, the reinforcing plate may be, for example, a resin sheet that is difficult to bend. In the second embodiment, a reinforcing plate 260 is provided at the location where the connector 220 is mounted, so as to allow for proper mounting of the connector 220. Figure 9B The location of the fixing reinforcing plate 260 is shown in bold dashed lines. This will be explained in more detail below. Alternatively, the reinforcing plate can also be installed at locations other than where the connector 220 is mounted.

[0038] In the second embodiment, the housing 250 has a rectangular annular shape. An opening 253 is provided in the center of the housing 250 (see reference). Figure 10A as well as Figure 10BFurthermore, as described above, the FPC210 has a closed portion 210X that closes the opening 253 (see reference). Figure 7A , Figure 9A as well as Figure 9B Additionally, the FPC module 200 of the second embodiment includes a reinforcing plate 260 having a higher strength than the FPC 210. The reinforcing plate 260 covers the closure portion 210X of the FPC 210 and is fixed to the housing 250 across the FPC 210 (see reference). Figure 8 A through hole 261 is provided in the reinforcing plate 260. A protrusion 252 for hot riveting provided in the housing 250 is inserted into the through hole 261 (see reference). Figure 11 Furthermore, the reinforcing plate 260 can be made of a resin sheet that is difficult to deform. Thus, the connector 220 used in the second embodiment is connected to the closure 210X. The reinforcing plate 260 is provided on the side opposite to the connector 220, separated from the FPC 210. Therefore, the FPC 210 (closure 210X) will not loosen, and the connector 220 can be mounted on the FPC 210.

[0039] Furthermore, as also described in the first embodiment, the method of fixing the housing 250 to the FPC 210 is not limited to thermal riveting. Various known techniques such as fixing with adhesives, bonding agents, or double-sided tape can also be used.

[0040] In the FPC module 200 configured as described above, with the FPC 210 fixed to the housing 250 positioned facing the battery 10, multiple busbars 240 are joined to the battery 10 (cell 11) by welding. The welding direction, etc., is the direction described in the first embodiment. Even in the second embodiment, the FPC 210 is positioned between the battery 10 and the housing 250.

[0041] <Advantages of the FPC module and battery unit in the second embodiment> Even in the second embodiment, as in the first embodiment, the FPC210 is disposed between the battery 10 and the housing 250. Therefore, the FPC210 is covered by the housing 250 (see FIG7). Thus, even if spatter is generated when the busbar 240 is soldered to the unit 11, the housing 250 can suppress the spatter from colliding with the FPC210. ​​That is, the same effect as in the first embodiment can be obtained. Furthermore, even in the second embodiment, when the FPC module 200 is mounted to the battery 10, the FPC210 faces downwards from the housing 250. However, the FPC210 is fixed relative to the housing 250. Therefore, the FPC210 will not sag. Moreover, even in the second embodiment, as in the first embodiment, it is possible to suppress contaminants such as dust or dirt from adhering to the electronic components disposed on the FPC. Additionally, although not specifically illustrated, as explained in the first embodiment, it is preferable to provide holes in the housing 250 for forming a sealed space for the electronic components.

[0042] Furthermore, in the configuration adopted in the second method, a reinforcing plate 260 is provided to cover the closure portion 210X of the FPC 210. Moreover, a connector 220 is mounted on the closure portion 210X. Therefore, when installing the connector 220, the closure portion 210X will not loosen or be damaged, allowing the connector 220 to be installed.

[0043] (Third implementation method) Reference Figure 12A as well as Figure 12B The FPC module and battery cell of the third embodiment will be described. In the description of the third embodiment, the configuration of the FPC module and battery cell of the first and second embodiments, which also have temperature measurement functions, will be explained. Figure 12A as well as Figure 12B This is a schematic diagram of the FPC module in the third embodiment. Figure 12A This is a schematic cross-sectional view of the FPC module. Figure 12B This is a top view of an elastomer. Additionally, Figure 12A The cross-sectional view of the elastic body is equivalent to along Figure 12B A cross-sectional view along the BB line. Additionally, in Figure 12A as well as Figure 12B In this drawing, the same reference numerals are used for components that are the same as those shown in the first or second embodiment.

[0044] The FPC module of the third embodiment includes a thermistor element 21 and an elastomer 22. The thermistor element 21 is electrically connected to the wiring of FPC 110 or FPC 210. The thermistor element 21 is sandwiched between housing 150 and FPC 110 or housing 250 and FPC 210. In addition, in FPC 110 and FPC 210, a contact plate 23 is provided on the side opposite to the portion where the thermistor element 21 is provided, which contacts the monomer 11. The contact plate 23 is made of, for example, a plate of a material with high thermal conductivity, including aluminum. The contact plate 23 is attached to FPC 110 or FPC 210, for example, by adhesive or double-sided tape.

[0045] Thus, in the configuration adopted in the third embodiment, a thermistor element 21 is provided. Therefore, it is possible to monitor not only the voltage of the individual cells 11, but also the temperature of the individual cells 11. In addition, generally speaking, in a battery, the voltage of all individual cells is monitored. In contrast, it is not necessary to monitor the temperature of all individual cells. Therefore, an appropriate number of thermistor elements 21 are provided depending on the number of individual cells 11 in the battery 10 or the usage environment.

[0046] The elastomer 22 is made of a foam material such as foamed rubber or foamed polyurethane. In the third embodiment, the elastomer 22 is formed into a cylindrical shape. Furthermore, a thermistor element 21 is disposed inside the cylinder. Figure 12B The position of the thermistor element 21 disposed inside the cylinder is shown by a dashed line. Additionally, the elastomer 22 can be bonded to the FPC 110, and the elastomer 22 to the housing 150, using adhesive or double-sided tape. Similarly, the elastomer 22 can be bonded to the FPC 210, and the elastomer 22 to the housing 250, using adhesive or double-sided tape.

[0047] As described above, in the third embodiment, a thermistor element 21 for measuring the temperature of the cell 11 and an elastomer 22 are disposed between the housing 150 and the FPC 110 or between the housing 250 and the FPC 210. Furthermore, in the third embodiment, the FPC module 100 or FPC module 200 is disposed on the battery 10 such that the FPC 110 or FPC 210, which is fixed to the housing 150 or housing 250, faces the battery 10. Therefore, as described above, the thermistor element 21 and the elastomer 22 can be disposed between the housing 150 or housing 250 and the FPC 110 or FPC 210. That is, by simply disposing of the thermistor element 21 and the elastomer 22 between the housing 150 or housing 250 and the FPC 110 or FPC 210, when the FPC module 100 or FPC 200 is installed on the battery 10, the elastic force of the elastomer 22 can be used to press the FPC 110 or FPC 210 toward the cell 11. By doing so, the contact plate 23 can be brought into close contact with the monomer 11. Therefore, unlike conventional techniques, a structure for measuring the temperature of the monomer 11 can be achieved without a complex structure. Consequently, the housings 150 and 250 can be miniaturized. The detailed description has been given for illustrative and explanatory purposes. Many variations and modifications are possible in accordance with the teachings above. The detailed description is not without omissions or intended to limit the subject matter described herein. Although the subject matter has been described in words with particular structural features and / or methodological processes, it should be understood that the subject matter defined in the claims is not necessarily limited to the specific features or processes described. Rather, the specific features and processes described are illustrated as examples of implementing the claims.

Claims

1. A flexible printed wiring board module configured to be installed in a battery comprising multiple individual cells, wherein, The flexible printed wiring board module includes a flexible printed wiring board, multiple busbars, and a housing. The flexible printed wiring board includes wiring. The plurality of busbars are electrically connected to the wiring. The flexible printed wiring board and the plurality of busbars are mounted on the housing. The flexible printed wiring board is configured to be disposed between the battery and the housing.

2. The flexible printed wiring board module according to claim 1, wherein, The housing is provided with multiple mounting holes. The plurality of busbars are respectively fixed to one of the corresponding plurality of mounting holes. The flexible printed wiring board is fixed to the housing at multiple locations by thermal riveting.

3. The flexible printed wiring board module according to claim 1, wherein, The flexible printed wiring board module also includes a reinforcing plate and connectors. An opening is formed in the housing. The flexible printed wiring board includes a closing portion that seals the opening. The reinforcing plate covers the enclosure and is fixed to the housing via the flexible printed wiring board, and has higher strength than the flexible printed wiring board. The connector is disposed within the opening and installed in the closure.

4. The flexible printed wiring board module according to any one of claims 1 to 3, wherein, A thermistor element is disposed between the housing and the flexible printed wiring board, the thermistor element being configured to measure the temperature of the individual unit.

5. A battery cell, wherein, The battery unit includes: a battery comprising multiple individual cells; and a flexible printed wiring board module mounted on the battery. The flexible printed wiring board module includes a flexible printed wiring board, multiple busbars, and a housing. The flexible printed wiring board includes wiring. The plurality of busbars are electrically connected to the wiring. The flexible printed wiring board and the plurality of busbars are mounted on the housing. The flexible printed wiring board is disposed between the battery and the housing.

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