JP2012182082A - Battery unit, heat exchanger plate, and method for manufacturing heat exchanger plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling or heating structure of a battery that is easy to be assembled.SOLUTION: A battery unit 100 includes a plurality of batteries 10, and heat exchanger plates 20 arranged between the batteries 10. The heat exchanger plates 20 have: respective battery-facing portions 22 that face the batteries 10; and respective extension portions 24 that extend outward from the respective battery-facing portions 22 and beyond outer edges of the batteries 10. The extension portions 24 transfer external heat to the batteries 10 through the respective battery-facing portions 22, or dissipate heat received from the batteries 10 through the respective battery-facing portions 22, to the outside.

Description

  The present invention relates to a battery unit, a heat transfer plate used for the battery unit, and a method for manufacturing the heat transfer plate.

  When a battery such as a lithium ion secondary battery is charged or discharged at a high temperature or a low temperature, the characteristics of the battery are adversely affected. Therefore, it is preferable that the battery is appropriately cooled or heated. Patent Document 1 discloses a power supply device in which a heat exchange pipe is disposed between unit cells, and a heat exchange liquid is circulated through the heat exchange pipe to cool or heat the unit cells.

  Japanese Patent Application Laid-Open No. 2009-9888

  The structure for cooling or heating the battery in the conventional power supply apparatus is complicated and requires a lot of labor to assemble. Accordingly, the present invention provides a structure for cooling or heating a battery that is easy to assemble.

  The battery unit according to the present invention is arranged between a plurality of batteries, a battery facing portion facing the plurality of batteries, and an extension extending from the battery facing portion to the outside of the outer edges of the plurality of batteries. A heat transfer plate having a portion, and the extending portion transmits heat received from the outside to the plurality of batteries via the battery facing portion, or heat received from the plurality of batteries via the battery facing portion to the outside. To dissipate heat.

  In one aspect of the battery unit, the battery unit may further include a blocking portion that blocks the first space including the plurality of batteries and the battery facing portion and the second space including the extending portion.

  In one aspect of the battery unit, the blocking portion may have a waterproof structure that prevents liquid from entering the first space from the second space.

  In one aspect of the battery unit, the extending portion includes a small plate portion formed by cutting an end portion, and the small plate portion has a direction substantially parallel to the surface direction of the heat transfer plate as a central axis. It may be twisted.

  In one aspect of the battery unit, the small plate portion may be twisted about a direction substantially parallel to the cutting direction of the end portion as a central axis.

  In one aspect of the battery unit, the battery unit includes a plurality of heat transfer plates disposed between each of the plurality of batteries, the small plate portion of the first heat transfer plate among the plurality of heat transfer plates, The small plate portion of the second heat transfer plate among the heat transfer plates may be provided at a different position in a direction substantially perpendicular to the surface direction of the plurality of heat transfer plates.

  In one aspect of the battery unit, the battery unit may further include a plurality of insulating portions disposed between the plurality of batteries.

  In one aspect of the battery unit, each of the plurality of batteries includes three or more heat transfer plates arranged substantially parallel to each other, and is arranged inside the three or more heat transfer plates. The heat transfer plate which is present may be thicker than the heat transfer plate disposed on the outside among the three or more heat transfer plates.

  In one aspect of the battery unit, each of the plurality of batteries includes three or more heat transfer plates arranged substantially parallel to each other, and is arranged inside the three or more heat transfer plates. The heat resistance of the heat transfer plate that is present may be smaller than the heat resistance of the heat transfer plate that is disposed outside of the three or more heat transfer plates.

  In one aspect of the battery unit, the battery unit may further include a temperature sensor that detects the temperature of at least one of the plurality of batteries, and the battery facing portion may have a sensor groove in which the temperature sensor is disposed.

  In one aspect of the battery unit, the battery unit further includes a substrate mounted on a terminal side of the plurality of batteries, on which a circuit for controlling the plurality of batteries is mounted, and the extending portion extends to the opposite side to the terminals of the plurality of batteries. You may do it.

  In one aspect of the battery unit, each of the plurality of batteries may be a laminated battery cell.

  The heat transfer plate according to the present invention is a heat transfer plate that transfers heat to and from the battery, and includes a battery facing portion that faces the battery, and a stretching portion that extends from the battery facing portion. A small plate portion formed by cutting the end portion may be included, and the small plate portion may be twisted about a direction substantially parallel to the surface direction of the heat transfer plate as a central axis.

  A method of manufacturing a heat transfer plate according to the present invention is a method of manufacturing a heat transfer plate that transfers heat to and from a battery, and includes a battery facing portion that faces the battery, and an extending portion that extends from the battery facing portion. A step of forming a small plate portion by cutting an end portion of the extending portion of the heat transfer plate, and a step of twisting the small plate portion about a direction substantially parallel to the surface direction of the heat transfer plate as a central axis.

  It should be noted that the above summary of the invention does not enumerate all the necessary features of the present invention. In addition, a sub-combination of these feature groups can also be an invention.

It is a perspective view of the battery unit which concerns on this embodiment. It is the one part perspective view seen from the back side of a battery unit. It is a side view of a part of a battery unit. It is a perspective view of a base. It is a perspective view of a battery. It is a front view of a heat exchanger plate. It is a perspective view of a spring terminal. It is a perspective view of a spring terminal. It is a perspective view of a 1st holding plate. It is a perspective view of the 1st holding plate in which the spring terminal is arrange | positioned. It is a perspective view of a holding part. It is an enlarged view of a part of a holding part. It is an enlarged view of a part of a holding part. It is typical sectional drawing of the part containing a holding | maintenance part and a board | substrate. It is a figure for demonstrating the assembly process of a battery unit. It is a figure for demonstrating the assembly process of a battery unit. It is a figure for demonstrating the assembly process of a battery unit. It is a figure for demonstrating the assembly process of a battery unit. It is a figure for demonstrating the assembly process of a battery unit. It is a perspective view of the battery unit which concerns on a modification. It is an enlarged view of the extending | stretching part of the heat exchanger plate which concerns on a modification. It is an enlarged view of the extending | stretching part of the heat exchanger plate which concerns on another modification. It is an enlarged view of the extending | stretching part of the heat exchanger plate which concerns on another modification.

  Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the invention according to the claims. In addition, not all the combinations of features described in the embodiments are essential for the solving means of the invention. The “battery unit” and “battery” in the claims or the embodiments are used as terms indicating a cell battery, a battery block having a plurality of cell batteries, or a battery pack having a plurality of battery blocks. In addition to the battery itself, the “battery unit” includes a substrate provided with a member for fixing or holding a plurality of batteries to each other, or a circuit for controlling the battery or a circuit for detecting the state of the battery. Also used as the name of the structure.

  FIG. 1A is a perspective view of the battery unit 100 according to the present embodiment. FIG. 1B is a perspective view of a part of the battery unit 100 as seen from the direction indicated by the arrow 200 in FIG. 1A. FIG. 1B is a side view of a part of the battery unit 100 as viewed from the direction indicated by the arrow 202 in FIG. 1A.

  The battery unit 100 includes a plurality of batteries 10, a plurality of heat transfer plates 20, a base 30, a holding unit 50, and a substrate 60. For example, the battery unit 100 is mounted on a vehicle and functions as a power supply device that supplies electric power to an electric motor that runs the vehicle. A heat exchange medium that is a liquid such as silicon oil or a gas such as air whose temperature is adjusted by the temperature control device flows from the opening 31 of the base 30, thereby allowing a plurality of batteries to pass through the plurality of heat transfer plates 20. The temperature of 10 is adjusted.

  The battery 10 is a flat battery, for example, a laminated lithium ion secondary battery cell. The plurality of batteries 10 are arranged in a line in a predetermined arrangement direction (X direction) on the surface of the base 30. The plurality of batteries 10 may be arranged in two or more rows along the arrangement direction.

  The plurality of heat transfer plates 20 are made of a metal or resin having a relatively low thermal resistance, and are made of, for example, an aluminum plate, an aluminum alloy plate, a nickel alloy plate, a copper plate, or the like. The plurality of heat transfer plates 20 are supported by the base 30 and are arranged between the plurality of batteries 10 along the arrangement direction of the plurality of batteries 10. The heat transfer plate 20 includes a battery facing portion 22 that faces the adjacent battery 10 and an extending portion 24 that extends from the battery facing portion 22 to the outside of the outer edge of the battery 10.

  As illustrated in FIG. 1B, the extending portion 24 protrudes from the back surface through a plate insertion hole formed in the base 30. A filler such as silicon resin is filled between the extending portion 24 and the plate insertion hole. Thereby, the base 30 and the filler function as a blocking portion, and the first space 210 including the respective battery facing portions 22 of the plurality of batteries 10 and the plurality of heat transfer plates 20, and the plurality of heat transfer illustrated in FIG. 1C. The 2nd space 212 containing each extending part 24 of board 20 is intercepted. Further, the base 30 and the filler function as a waterproof structure when liquid is used as a heat exchange medium, and prevents liquid from entering the first space 210 from the second space 212.

  The extending unit 24 transmits the heat received from the heat exchange medium to the adjacent battery 10 via the battery facing unit 22. Or the extending | stretching part 24 radiates the heat | fever received via the battery opposing part 22 from the adjacent battery 10 to the exterior via a heat exchange medium. Thereby, the battery 10 is cooled or heated, and the temperature of the battery 10 is controlled to a predetermined temperature range.

  The pair of end plates 32 are fastened by a coupling tool 32A including a coupling bolt and a coupling nut, so that the plurality of batteries 10 and the plurality of heat transfer plates 20 disposed between the pair of end plates 32 are sandwiched and fixed. .

  The holding unit 50 includes a first holding plate 50A and a pair of second holding plates 50B. As shown in FIG. 1C, the holding unit 50 is disposed above the battery 10 and the heat transfer plate 20 and holds the spring terminal 40. The spring terminal 40 functions as a terminal connection portion, and fixes the terminal 14 protruding from the main body portion 12 of the battery 10. The spring terminal 40 is electrically connected to the terminal 14.

  The substrate 60 is disposed above the holding unit 50. The substrate 60 has a wiring pattern 64 and a substrate through hole 62. A conductive fixing portion 63 is inserted into the substrate through hole 62. The conductive fixing portion 63 has a male screw and is screwed into the female screw 43 of the spring terminal 40 via the substrate through hole 62 and the second holding plate through hole 53B formed in the second holding plate 50B. The conductive fixing portion 63 electrically connects the wiring pattern 64 and the spring terminal 40. Further, the conductive fixing portion 63 mechanically fixes the spring terminal 40 and the substrate 60.

  Thus, since the terminal of the battery 10 and the wiring pattern 64 of the substrate 60 are electrically connected by the screw-like conductive fixing portion 63, the terminal of the battery 10 and the wiring pattern 64 of the substrate 60 are electrically connected. No wire harness is required for connection to the cable. Therefore, electrical connection and mechanical fixing can be realized only by screwing the substrate 60, and wiring work of the wire harness can be reduced.

  FIG. 2 is a perspective view of the base 30. The base 30 has a plurality of plate insertion holes 30 </ b> A, a connector insertion hole 30 </ b> B, and an opening 31. The plurality of plate insertion holes 30 </ b> A are provided along the arrangement direction of the end plates 32 and the plurality of heat transfer plates 20. The end portions of the end plate 32 are inserted into the plate insertion holes 30A provided at both ends, and the extending portions 24 of the heat transfer plate 20 are inserted into the plate insertion holes 30A provided at other than both ends. The connector insertion hole 30B is a through hole for inserting the connector 32A. The opening 31 is an entrance for supplying a heat exchange medium to the back side of the base 30.

  FIG. 3 is a perspective view of the battery 10. The battery 10 includes a main body 12 and a pair of terminals 14. The main body 12 includes an exterior body that includes a metal layer such as aluminum and a heat-weldable resin layer that are superposed via an adhesive layer. In the exterior body, an electrode group in which a positive electrode and a negative electrode are sandwiched between separators and an electrolyte solution are sealed. The terminal 14 is a conductive member such as a plate-like copper plate that protrudes from the main body 12 and is connected to the positive electrode or the negative electrode. The battery 10 may be a flat battery, a square battery, a cylindrical battery, or the like. Further, as the battery 10, a secondary battery such as a nickel metal hydride battery or a nickel cadmium battery may be used.

  FIG. 4 is a perspective view of the heat transfer plate 20. The heat transfer plate 20 includes a battery facing portion 22 facing the battery 10 and an extending portion 24 extending from the battery facing portion 22. The battery facing part 22 and the battery 10 may be in direct contact. Further, an insulating material such as an insulating sheet or an insulating plate may be disposed between the battery facing portion 22 and the battery 10. Further, the battery facing portion 22 has a sensor groove 26 in which a temperature sensor that detects the temperature of the battery 10 is disposed. The sensor groove 26 is formed from the approximate center of the end opposite to the extending portion 24 of the battery facing portion 22 toward the extending portion 24. Moreover, the extending | stretching part 24 has the heat-transfer plate hole 28 for inserting the coupling tool 32A.

  Here, when the plurality of batteries 10 are arranged adjacent to each other, the battery 10 disposed inside the plurality of batteries 10 has a lower heat dissipation efficiency than the battery disposed outside. Therefore, in order to suppress variations in the temperature of the battery 10, the amount of heat that can be transferred per unit time of the heat transfer plate 20 that is arranged inside the outside of the plurality of heat transfer plates 20 may be increased. Specifically, the heat transfer plate 20 arranged inside the plurality of heat transfer plates 20 may be thicker than the heat transfer plate 20 arranged outside. Or the heat exchanger plate 20 arrange | positioned inside the some heat exchanger plate 20 may be comprised with the raw material whose heat resistance is smaller than the heat exchanger plate 20 arrange | positioned outside. Thereby, the dispersion | variation in the temperature of the some battery 10 can be suppressed.

  FIG. 5A is a perspective view of the spring terminal 40A. FIG. 5B is a perspective view of the spring terminal 40B. The spring terminal 40 </ b> A and the spring terminal 40 </ b> B are an example of a terminal connection portion, and are fixed with the terminal 14 of the battery 10 interposed therebetween and electrically connected to the terminal 14.

  The spring terminal 40A is made of a conductive material such as copper and has a support portion 42A and a plurality of spring portions 44A. The support portion 42A is supported on the surface of the first holding plate 50A on the substrate 60 side. The support portion 42A has a female screw 43A to which the conductive fixing portion 63 is screwed. The support portion 42A and the conductive fixing portion 63 may be fixed by a method other than screwing. For example, you may fix by fitting the front-end | tip part of the electroconductive fixing | fixed part 63 in the hole formed in 42 A of support parts. The spring portion 44A is fixed with the terminal 14 interposed therebetween. The spring portion 44A includes a pair of terminal fixing portions 45A and a connecting portion 46A that connects the pair of terminal fixing portions 45A. The connecting portion 46A has an insertion port 47A into which the terminal 14 is inserted. The terminal 14 is inserted from the insertion port 47A and is fixed by being sandwiched between the pair of terminal fixing portions 45A by the spring force of the connecting portion 46A. Thereby, the terminal 14 is electrically and mechanically connected to the spring terminal 40A.

  The spring terminal 40B has a support portion 42B and a plurality of spring portions 44B. The spring portion 44B is the same as the spring portion 44A. The support portion 42B is different from the support portion 42A in that it has a hole 48 for fixing the output terminal of the battery unit 100.

  In the present embodiment, three adjacent batteries 10 are connected in parallel via the spring terminal 40A or the spring terminal 40B to constitute one battery block. Furthermore, the spring terminal 40A and the spring terminal 40B are electrically connected to the spring terminal 40A or the spring terminal 40B of the adjacent battery block via a bus bar or the like. Thereby, a plurality of battery blocks are connected in series.

  FIG. 6A is a perspective view of the first holding plate 50A. FIG. 6B is a perspective view of the first holding plate 50A on which the spring terminal 40A and the spring terminal 40B are arranged. FIG. 6C is a perspective view of the holding unit 50.

  The first holding plate 50A and the pair of second holding plates 50B are formed of an insulating resin such as an epoxy resin. The first holding plate 50 has a plurality of groove portions 52A, recesses 56A, and holes 57A into which end portions of the end plate 32 are inserted. The plurality of groove portions 52A are provided along each of two opposing side surfaces. The groove 52A has a shape along the outer edge shape of the support portion 42A of the spring terminal 40A or the support portion 42B of the spring terminal 40B. A plurality of first holding plate through holes 54A are formed on the bottom surface of the groove 52A. The spring portion 44A and the spring portion 44B are inserted into the first holding plate through hole 54A from the surface on the substrate 60 side, and are exposed from the surface on the battery 10 side of the first holding plate 50A.

  As shown in FIG. 6B, the spring terminal 40A and the spring terminal 40B are supported on the substrate-side surface of the first holding plate 50A by fitting the support portion 42A and the support portion 42B into the respective groove portions 52A. As shown in FIG. 6C, the pair of second holding plates 50B are spaced apart so as to cover the spring terminals 40A and the plurality of groove portions 52A of the first holding plate 50A holding the spring terminals 40B. With this arrangement, the holding unit 50 is configured. The holding part 50 has a recess 50. The recess 50 is defined by the recess 50A of the first holding plate 50A and the opposing side surfaces of the pair of second holding plates 50B. The spring terminal 40A and the spring terminal 40B are sandwiched and fixed between the insulating first holding plate 50A and the second holding plate 50B. By being fixed in this way, the work becomes easier as compared with the case where the spring terminal 40A and the spring terminal 40B are directly soldered to the substrate 60 and fixed.

  FIG. 7A is an enlarged view of a portion indicated by reference numeral 300 in FIG. 6C. FIG. 7B is an enlarged view of a portion indicated by reference numeral 302 in FIG. 6C.

  The first holding plate 50A has a first holding plate groove 51A on the surface facing the second holding plate 50B on the second holding plate 50B side. A fastening portion 59 is inserted into the first holding plate groove 51 from one side surface of the first holding plate 50A. The second holding plate 50B has a second holding plate groove 51B at a position facing the first holding plate groove 51A on the surface on the second holding plate 50B side. A fastening portion 59 is inserted into the second holding plate groove 51B from the side surface side of the second holding plate 50B.

  The first holding plate groove 51A has a portion having a width wider than the width on the surface of the first holding plate 50A in the depth direction. Similarly, the second holding plate groove 51B has a portion having a width wider than the width on the surface of the second holding plate 50B in the depth direction. The cross section of the first holding plate groove 51A is formed in a tapered shape that becomes wider from the contact surface with the second holding plate 50B toward the bottom surface. Similarly, the cross section of the second holding plate groove 51B is formed in a tapered shape that becomes wider from the contact surface with the first holding plate 50A toward the bottom surface.

  The cross section of the fastening portion 59 has a ribbon shape that narrows toward the center. The fastening portion 59 having such a shape is inserted into the first holding plate groove 51A and the second holding plate groove 51B from one side surface, thereby fixing the first holding plate 50A and the second holding plate 50B. . Thereby, an assembly man-hour can be reduced compared with the case where it fixes by screwing.

  The second holding plate 50B may be fixed to the first holding plate 50A by a screw in addition to the fastening portion 59. Further, the first holding plate 50A and the second holding plate 50B may be fixed with an adhesive.

  FIG. 8 is a schematic cross-sectional view including a part of the holding plate 50 and the substrate 60.

  The substrate 60 is disposed on the holding unit 50. The substrate 60 has wiring patterns 64a and 64b on both sides. The wiring pattern 64 a and the wiring pattern 64 b are electrically connected through the through hole 65. In addition, the substrate 60 includes a switch circuit 66 and a voltage detection circuit 68 as electronic components at positions facing the recesses 56 on the surface facing the holding unit 50. Thereby, even if the board | substrate 60 is arrange | positioned directly on the holding | maintenance board 50, an electronic component can be arrange | positioned on the surface facing the holding | maintenance part 50 of the board | substrate 60. FIG. Note that the switch circuit 66 and the voltage detection circuit 68 may be configured by one circuit. Further, the voltage detection circuit 68 may be provided for each battery 10 to be measured.

  Each switch circuit 66 is selectively electrically connected to the terminal 14 of the battery 10 through the spring terminal 40, the conductive fixing portion 63, the wiring pattern 64a, the through hole 65, and the wiring pattern 64b. The voltage detection circuit 68 detects the voltage between the terminals of the battery 10 to be detected via the conductive fixing unit 63 selected by the switch circuit 66. The terminal 14 of the battery 10 is electrically connected to the wiring pattern 64 a of the substrate 60 through the spring terminal 40 and the conductive fixing portion 63. Therefore, for example, in order to measure the voltage between terminals for every battery 10, it is not necessary to connect the terminals and wiring patterns of all the batteries 10 with the wire harnesses. Therefore, the wiring work of the wire harness can be reduced and the wiring space can be reduced.

  9 to 13 are diagrams for explaining an assembly process of the battery unit 100. FIG.

  First, the end plate 32 and the heat transfer plate 20 are inserted into each of the plurality of plate insertion holes 30A of the base 30, and the end plate 32 and the heat transfer plate 20 are raised with respect to the base 30 (FIG. 9). Further, the gap between the end plate 32 and the heat transfer plate 20 and the plate insertion hole 30A is sealed with a filler such as silicon resin. Next, the battery 10 is inserted into the gap between each of the end plate 32 and the heat transfer plate 20 (FIG. 10).

  Next, the battery 10 and the heat transfer plate 20 disposed between the pair of end plates 32 are sandwiched and fixed by the plurality of connectors 32A via the pair of end plates 32 (FIG. 11). Furthermore, after the holding portion 50 is disposed above the battery 10 and the pair of end plates 32 are inserted into the respective holes 57A to determine the position of the holding portion 50, the respective terminals 14 of the battery 10 are connected to the spring terminals 40A and 40A. It is fixed by being sandwiched between spring terminals 40B (FIG. 12). As described above, the spring terminals 40A and the spring terminals 40B corresponding to the terminals of the respective batteries 10 are fixed to the holding unit 50 in advance. Therefore, the spring terminal 40 </ b> A and the spring terminal 40 </ b> B can be connected to all the terminals 14 of the plurality of batteries 10 simply by pressing the holding unit 50 from the upper surface of the battery 10.

  Next, the substrate 60 is disposed on the holding unit 50. After the substrate 60 is disposed, the holding unit 50 and the substrate 60 are screwed together. Further, the conductive fixing portion 63 is inserted into the substrate through hole 62 and screwed into the substrate 60, the spring terminal 40A, and the spring terminal 40B. Further, the battery case 70 covers the plurality of batteries 10 and the battery facing portions 22 of the plurality of heat transfer plates 20, so that the first space including the plurality of batteries 10 and the battery facing portions 22 of the plurality of heat transfer plates 20 is formed. Seal (FIG. 13).

  By constructing the battery unit 100 by the assembly process as described above, complicated operations such as soldering and connection of a wire harness can be reduced, so that a battery cooling or heating structure that is easy to assemble can be provided.

  FIG. 14 is a perspective view of a battery unit 100 according to a modification of the present embodiment. In this modification, the base 30 has openings 31 on both side surfaces in the arrangement direction of the plurality of heat transfer plates 20, and the other structure is the same as that of FIG. 1A, unlike the battery unit 100 shown in FIG. 1A.

  Since the battery unit 100 is mounted on a vehicle, the arrangement is limited by the structure of the vehicle. Therefore, depending on the structure of the vehicle, it may be preferable to construct the heat exchange medium flow path so that the heat exchange medium flows in the arrangement direction of the plurality of heat transfer plates 20. Therefore, in the present modification, the base 31 has openings 31 on both side surfaces in the arrangement direction of the plurality of heat transfer plates 20.

  FIG. 15 is an enlarged view of a part of the extending portion 24 of the heat transfer plate 20 according to the modification. The extending portion 24 according to this modification includes a small plate portion 24A formed by cutting an end portion. The small plate portion 24A is twisted about a direction substantially parallel to the cutting direction of the end portion as a central axis. By twisting the small plate portion 24A in this way, it is possible to prevent the extending portion 24 on the upstream side of the flow path from obstructing the flow of the heat exchange medium. The small plate portion 24 </ b> A may be twisted with the width direction substantially parallel to the surface direction of the heat transfer plate 20 as the central axis.

  16A and 16B are enlarged views of a part of the extending portion 24 of the heat transfer plate 20 according to another modification. In another modification, the plurality of small plate portions 24A-1 of the first heat transfer plate 20-1 among the plurality of heat transfer plates 20 and the second adjacent to the first heat transfer plate 20-1. Among the plurality of small plate portions 24A-2 of the heat transfer plate 20-2, the small plate portions at different positions in the arrangement direction of the plurality of heat transfer plates 20 are respectively twisted.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

  The execution order of each process such as operation, procedure, step, and stage in the apparatus and method shown in the claims, the description, and the drawings is clearly indicated as “before”, “prior”, etc. It should be noted that, unless the output of the previous process is used in the subsequent process, it can be realized in any order. Regarding procedures in the claims, the description, and the drawings, even if “first”, “next”, etc. are used for convenience, this means that it is essential to carry out in this order. is not.

DESCRIPTION OF SYMBOLS 10 Battery 14 Terminal 20 Heat-transfer plate 22 Battery facing part 24 Extension part 30 Base 32 End plate 40A, 40B Spring terminal 50 Holding part 50A 1st holding plate 50B 2nd holding plate 51A 1st holding plate groove 51B 2nd holding plate Groove 59 Fastening portion 60 Substrate 63 Conductive fixing portion 70 Battery case 100 Battery unit

Claims (14)

Multiple batteries,
A heat transfer plate disposed between the plurality of batteries and having a battery facing portion facing the plurality of batteries and an extending portion extending from the battery facing portion to an outer side of an outer edge of the plurality of batteries. ,
The extending section transmits heat received from the outside to the plurality of batteries via the battery facing section, or dissipates heat received from the plurality of batteries via the battery facing section to the outside. .   2. The battery unit according to claim 1, further comprising a blocking portion that blocks a first space including the plurality of batteries and the battery facing portion and a second space including the extending portion.   The battery unit according to claim 2, wherein the blocking unit has a waterproof structure that prevents liquid from entering the first space from the second space. The extending portion includes a small plate portion formed by cutting an end portion,
The battery unit according to any one of claims 1 to 3, wherein the small plate portion is twisted about a direction substantially parallel to a surface direction of the heat transfer plate as a central axis.   The battery unit according to claim 4, wherein the small plate portion is twisted about a direction substantially parallel to a cutting direction of the end portion as a central axis. A plurality of the heat transfer plates disposed between each of the plurality of batteries;
Of the plurality of heat transfer plates, the small plate portion of the first heat transfer plate and the small plate portion of the second heat transfer plate of the plurality of heat transfer plates are the plurality of heat transfer plates. 6. The battery unit according to claim 4, wherein the battery unit is provided at a different position in a direction substantially perpendicular to the surface direction of the plate.   The battery unit according to any one of claims 1 to 6, further comprising a plurality of insulating portions arranged between each of the plurality of batteries. Between each of the plurality of batteries, comprising three or more heat transfer plates disposed substantially parallel to each other,
The heat transfer plate arranged inside among the three or more heat transfer plates is thicker than the heat transfer plate arranged outside among the three or more heat transfer plates. The battery unit according to any one of the above. Between each of the plurality of batteries, comprising three or more heat transfer plates disposed substantially parallel to each other,
Among the three or more heat transfer plates, the heat resistance of the heat transfer plate arranged on the inner side is smaller than the heat resistance of the heat transfer plate arranged on the outer side among the three or more heat transfer plates. The battery unit according to any one of claims 1 to 8. A temperature sensor for detecting a temperature of at least one of the plurality of batteries;
The battery unit according to any one of claims 1 to 9, wherein the battery facing portion includes a sensor groove in which the temperature sensor is disposed. A board on which a circuit for controlling the plurality of batteries is mounted, which is disposed on the terminal side of the plurality of batteries;
The battery unit according to any one of claims 1 to 10, wherein the extending portion extends to the opposite side of the terminals of the plurality of batteries.   The battery unit according to any one of claims 1 to 11, wherein each of the plurality of batteries is a laminated battery cell. A heat transfer plate for transferring heat to and from the battery,
A battery facing portion facing the battery;
An extending portion extending from the battery facing portion,
The extending portion includes a small plate portion formed by cutting an end portion,
The small plate portion is a heat transfer plate twisted about a direction substantially parallel to the surface direction of the heat transfer plate as a central axis. A method of manufacturing a heat transfer plate that transfers heat to and from a battery,
Forming a small plate portion by cutting an end portion of the heat transfer plate having a battery facing portion facing the battery and an extending portion extending from the battery facing portion; and
And a step of twisting the small plate portion about a direction substantially parallel to the surface direction of the heat transfer plate as a central axis.

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