JP2017076490A - Method for manufacturing power storage module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a power storage module capable of highly accurately controlling an application quantity of a heat transfer material coated on a heat transfer surface of a heat transfer member.SOLUTION: A method for manufacturing a power storage module comprising a plurality of power storage cells 11 arranged in a first direction and a heat transfer plate 50 connected to each of the plurality of power storage cells 11 and having a heat transfer surface 50A includes: a step S1 of measuring distances G11, G12, G13, G11A, and G11B from a reference surface R arranged facing the heat transfer surface 50A to the heat transfer surface 50A; a step S2 of calculating an application quantity of the liquid heat transfer material corresponding to the distances G11, G12, G13, G11A, and G11B; and a step S3 of individually applying a heat transfer material having the calculated amount of coating onto the heat transfer surface 50A.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a method for manufacturing a power storage module.

  A battery module including a plurality of battery cells and a heat transfer plate connected to each of the plurality of battery cells is known (see Patent Document 1). This battery module is fixed to the housing such that the heat transfer plate faces the housing. Here, the heat transfer material is applied so that the amount of heat transfer material applied to the recessed portion is increased so that the unevenness formed by the opposing surfaces on the housing side of the plurality of heat transfer plates is absorbed. .

JP, 2014-116193, A

  In the method described in Patent Document 1, there is room for improvement in the control of the amount of heat transfer material applied on the opposite surface of the heat transfer plate on the housing side.

  An object of one aspect of the present invention is to provide a method for manufacturing a power storage module that can control the application amount of a heat transfer material applied on a heat transfer surface of a heat transfer member with high accuracy.

  A method for manufacturing a power storage module according to one aspect of the present invention includes a plurality of power storage cells arranged in a first direction, and a heat transfer member connected to each of the plurality of power storage cells and having a heat transfer surface. A method for manufacturing an energy storage module, the step of measuring a distance from a reference surface disposed opposite to the heat transfer surface to the heat transfer surface, and calculating a coating amount of a liquid heat transfer material corresponding to the distance And a step of individually applying the calculated amount of the heat transfer material to the heat transfer surface.

  According to this manufacturing method, even when the distance from the reference surface to each heat transfer surface is different, the amount of heat transfer material applied on each heat transfer surface can be controlled with high accuracy. it can.

  In the step of applying the heat transfer material, the heat transfer material may be applied intermittently using a nozzle that moves relative to the heat transfer surface along the first direction.

  In this case, even if the number of storage cells changes, the heat transfer material can be applied to each heat transfer surface only by changing the moving distance of the nozzle and the number of times of applying the heat transfer material. Therefore, it is not necessary to change the number of nozzles according to the number of storage cells.

  In the step of applying the heat transfer material, the heat transfer material may be applied using a plurality of nozzles respectively corresponding to the plurality of power storage cells.

  In this case, since the heat transfer material can be applied simultaneously on each heat transfer surface, the heat transfer material can be applied in a short time. Further, as compared with the case where the heat transfer material is intermittently applied, the positioning of the nozzle is easy, and it is not necessary to control the timing of applying the heat transfer material from the nozzle with high accuracy.

  In the step of measuring the distance, the distance may be measured at a plurality of locations for each heat transfer member.

  In this case, even if the distance from the reference surface to the heat transfer surface varies depending on the location of one heat transfer member, the amount of heat transfer material applied on the heat transfer surface is controlled with high accuracy. can do.

  According to one aspect of the present invention, it is possible to provide a method for manufacturing a power storage module that can control the application amount of the heat transfer material applied on the heat transfer surface of the heat transfer member with high accuracy.

It is a perspective view which shows the whole structure of an electrical storage module. It is a perspective view which shows the cell holder and the cell holder which hold | maintained the electrical storage cell of the electrical storage module of FIG. It is a top view which shows the clearance gap which arises when attaching the electrical storage module of FIG. 1 to a housing | casing. It is a flowchart which shows each process of the manufacturing method of the electrical storage module which concerns on embodiment. It is a perspective view which shows the process of measuring the distance from a reference surface to a heat-transfer surface using a distance measuring device. It is a top view which shows the process of measuring the distance from a reference surface to a heat-transfer surface using a distance measuring device. It is a top view which shows the process of measuring the distance from a reference surface to a heat-transfer surface using a distance measuring device. It is a figure which shows the process of apply | coating a heat-transfer material intermittently. It is a figure which shows the process of apply | coating a heat-transfer material using the some nozzle each corresponding to a some electrical storage cell.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same reference numerals are used for the same or equivalent elements, and redundant descriptions are omitted.

(Power storage module)
FIG. 1 is a perspective view showing the overall configuration of the power storage module. FIG. 2 is a perspective view showing a cell holder and a cell holder holding the storage cell of the storage module of FIG. The power storage module 1 shown in FIG. 1 includes a plurality (13 in this example) of storage cells 11 (see FIG. 2A) arranged in the X-axis direction (first direction), and a plurality of storage cells 11. And a heat transfer plate 50 having a heat transfer surface 50A. The heat transfer plate 50 is an example of a heat transfer member. The heat transfer plate 50 is made of metal, for example. The heat transfer plate 50 may be in direct contact with the power storage cell 11 or may be connected to the power storage cell 11 via another heat transfer member.

  The power storage cell 11 is held by a cell holder 31 as shown in FIG. The storage cell 11 may be a battery including an electrode assembly (not shown) housed in a rectangular box-shaped case 11A. The storage cell 11 is a nonaqueous electrolyte secondary battery such as a lithium ion secondary battery. The electricity storage cell 11 may be an electric double layer capacitor. As shown in FIG. 1, in the present embodiment, the array body 14 is configured by arranging the storage cells 11 and the heat transfer plates 50 held in the cell holder 31 in the X-axis direction. The configuration of the cell holder 31 will be described in detail later.

  The power storage module 1 can include an elastic member 12, a restraining portion 15, and a plurality of bus bars (not shown) in addition to the array body 14. The elastic member 12 is formed in a flat plate shape by rubber, for example, and is arranged on one side in the arrangement direction (X-axis direction) of the array body 14.

  The restraint unit 15 restrains the power storage cell 11 and the elastic member 12 by pressing in the arrangement direction. The restraining portion 15 includes a pair of end plates 16, 16, bolts 17, and nuts 18. The pair of end plates 16 and 16 are formed of a material having high rigidity such as iron, for example. The pair of end plates 16 and 16 are fixed by a plurality of bolts 17 extending in the arrangement direction. Each bolt 17 is sequentially inserted into one end plate 16, each cell holder 31, and the other end plate 16, and is fastened by a nut 18 on the other end plate 16 side. A binding force is applied to the array body 14 by this fastening.

  The electrode terminals 13 of the adjacent storage cells 11 (see FIG. 2A) are electrically connected by a bus bar, which is a rectangular plate member formed of a metal such as copper, for example. More specifically, each power storage cell 11 has a positive electrode terminal and a negative electrode terminal as electrode terminals 13, and the plurality of power storage cells 11 are arranged so that electrode terminals 13 having different polarities are adjacent to each other. The bus bar electrically connects the plurality of power storage cells 11 in series by connecting these adjacent electrode terminals 13 to each other.

  Next, the configuration of the cell holder 31 will be described mainly using FIG. Hereinafter, as shown in FIG. 2A, the thickness direction of the storage cell 11 when the cell holder 31 holds the storage cell 11, the width direction of the storage cell 11 (the arrangement direction of the electrode terminals 13 and 13), the storage cell 11, the height direction perpendicular to the thickness direction and the width direction are respectively “X-axis direction (first direction)”, “Y-axis direction (second direction intersecting the first direction)”, “Z-axis direction ( 3rd direction intersecting the first direction and the second direction) ”.

  As shown in FIG. 2, the cell holder 31 includes a rectangular flat plate-like lower surface portion 35, a pair of side surface portions 37 and 37, a base portion 41, a terminal accommodating portion 43, and a column member 47. In addition, a control device E or the like can be disposed on the upper portion of the cell holder 31 via a cover.

  The lower surface part 35 is a plate-like member extending in the Y-axis direction. The lower surface portion 35 covers the bottom surface of the storage cell 11 when holding the storage cell 11. Leg portions 35 </ b> A and 35 </ b> A are provided at lower portions of both end portions of the lower surface portion 35. The leg portion 35A is provided with an insertion hole 35B penetrating along the X-axis direction. The above-described bolt 17 is inserted through the insertion hole 35B.

  The side surface portion 37 is a plate-like member extending in the Z-axis direction. The pair of side surface portions 37 and 37 are disposed at both ends of the lower surface portion 35 in the Y-axis direction. A pair of side surface parts 37 and 37 are arrange | positioned so that it may mutually oppose. The base portion 41 is a plate-like member having a thickness in the X-axis direction, and is provided so as to connect the pair of side surface portions 37 and 37.

  The terminal accommodating portion 43 is provided at both ends of the upper end of the base portion 41 in the Y-axis direction. The terminal accommodating portions 43 and 43 are provided so as to be connected to the side surface portions 37 and 37, respectively. The terminal accommodating portion 43 opens in a U shape in the X-axis direction. The terminal accommodating portions 43 and 43 are portions that respectively surround the electrode terminals 13 and 13 of the energy storage cell 11 when holding the energy storage cell 11.

  The column members 47 and 47 are provided adjacent to the terminal accommodating portions 43 and 43 at the upper end of the base portion 41. The column member 47 is a quadrangular columnar column member extending in the X-axis direction, and its length matches the X-axis direction length of the lower surface portion 35. Each of the column members 47, 47 is provided with an insertion hole 47A penetrating along the X-axis direction. The bolt 17 described above is inserted through the insertion hole 47A.

  In the cell holder 31, the housing portion S in which the storage cell 11 is housed by the space surrounded by the lower surface portion 35, the pair of side surface portions 37 and 37, the base portion 41, the terminal housing portions 43 and 43, and the column members 47 and 47. Is formed.

  FIG. 3 is a plan view showing a gap generated when the power storage module of FIG. 1 is attached to the housing. As shown in FIG. 3, when the power storage module 1 is attached to the metal housing 3 of the power storage pack (not shown), a gap G is formed between the heat transfer surface 50 </ b> A of the heat transfer plate 50 and the housing 3. (In other words, the amount of protrusion of the heat transfer plate 50 from the array 14) is formed. In the gap G, a heat transfer layer 20 formed by curing a liquid heat transfer material (TIM: Thermal Interface Material) is disposed. The heat transfer layer 20 has elasticity. The heat transfer layer 20 is in contact with the heat transfer surface 50 </ b> A and the housing 3. The heat transfer layer 20 is provided on the heat transfer surface 50 </ b> A, and is not shown in FIG. 1, but is a part of the power storage module 1.

  The heat transfer plate 50 may include a first portion 51 connected to the storage cell 11 and a second portion 52 connected to the first portion 51 and having a heat transfer surface 50A having a rectangular shape, for example. The heat transfer plate 50 has an L shape. The first portion 51 is disposed between adjacent storage cells 11 or between the storage cells 11 and the end plate 16 and extends along a plane (YZ plane) orthogonal to the X-axis direction. The first portion 51 is in contact with a side surface parallel to the YZ plane of the storage cell 11. The second portion 52 and the heat transfer surface 50A extend along the XZ plane (X-axis direction and Z-axis direction). The side surface portion 37 of the cell holder 31 is disposed between the second portion 52 and the storage cell 11.

(Method for manufacturing power storage module)
FIG. 4 is a flowchart showing each step of the method for manufacturing the power storage module according to the embodiment. The power storage module 1 of FIG. 1 can be manufactured by the following manufacturing method.

(Distance measurement process)
First, as shown in FIGS. 5 to 7, the distances G11, G12, G13, G11A, and G11B from the reference surface R disposed opposite to the heat transfer surface 50A of the heat transfer plate 50 to the heat transfer surface 50A are measured. (Step S1 in FIG. 4). In the Y-axis direction, the heat transfer surface 50A is located between the storage cell 11 and the reference surface R. The heat transfer surface 50A is parallel to the reference surface R. For the measurement of the distances G11, G12, G13, G11A, and G11B, a distance measuring device 60 shown in FIGS. 5 and 6A is used. The distance measuring device 60 includes a main body 61 and a depth meter 70. The depth meter 70 may be fixed to the main body 61 or may be detachably attached.

  The main body 61 is a plate-like member (jig) that extends in the X-axis direction (first direction) and the Z-axis direction (third direction). The first surface 61B on the heat transfer surface 50A side of the plate-shaped main body 61 is a reference surface R. The first surface 61B and the reference surface R are planes parallel to the XZ plane. The main body 61 is formed with a plurality of insertion holes 61A penetrating in the Y-axis direction (second direction). By arranging the plurality of insertion holes 61A in the X-axis direction, insertion hole groups 62A, 62B, and 62C extending in the X-axis direction are formed as shown in FIG. In the present embodiment, three sets of insertion hole groups 62A, 62B, and 62C are arranged along the Z-axis direction (third direction).

  A pair of attachment portions 63 and 63 are formed in the main body portion 61 to facilitate attachment to the pair of end plates 16 and 16. The attachment portion 63 is formed at a position corresponding to the pair of end plates 16 and 16. A magnet is disposed on the attachment portion 63. In addition, holding portions 65 are formed at both ends of the main body portion 61 in the X-axis direction. The holding part 65 is an opening that penetrates in the Y-axis direction (thickness direction), and facilitates holding of the distance measuring device 60.

  As shown in FIG. 6, the depth gauge 70 includes a rod-shaped member 73 that can penetrate the insertion hole 61 </ b> A, a contact portion 71 having a contact surface 71 </ b> A that contacts the second surface 61 </ b> C of the main body portion 61, And a display unit 75 that calculates and displays the depth from the contraction amount of the member 73. The display unit 75 may be a digital display unit or an analog display unit. The second surface 61C and the contact surface 71A are planes parallel to the XZ plane. The cross section of the rod-shaped member 73 is circular, for example. The rod-like member 73 is provided so as to be movable in the Y-axis direction in a state of being penetrated through the plurality of insertion holes 61A, that is, in a state where the end of the rod-like member 73 protrudes from the first surface 61B of the main body portion 61. . A contact surface 73 </ b> A that contacts the heat transfer surface 50 </ b> A of the heat transfer plate 50 when the distance measuring device 60 is attached to the power storage module 1 is provided at the end of the rod-shaped member 73 in the Y-axis direction. The contact surface 73A is a plane parallel to the XZ plane.

  The distance measuring device 60 having such a configuration is attached to the power storage module 1 such that the contact surfaces 73A of the plurality of rod-shaped members 73 are in contact with the heat transfer surfaces 50A of the plurality of heat transfer plates 50, respectively. Specifically, the distance measuring device 60 is attached to the pair of end plates 16 and 16 such that the extending direction of the main body 61 is parallel to the arrangement direction of the storage cells 11. The distance measuring device 60 is attached to the pair of end plates 16, 16 using the magnetic force of the pair of attachment portions 63, 63. At this time, as shown in FIGS. 6A and 7, the protruding amount of the rod-shaped member 73 from the reference surface R in the distance measuring device 60 is the difference between the heat transfer surface 50 </ b> A of the heat transfer plate 50 and the reference surface R. This corresponds to the distances G11, G12, G13, G11A, and G11B.

  Since the separate heat transfer plates 50 are connected to the individual power storage cells 11, for example, when the power storage cells 11 are restrained by the restraining portion 15, the distances G11, G12, G13, G11A, and G11B vary. Variations in distances G11, G12, and G13 between different heat transfer plates 50 shown in FIG. 6A are larger than variations in distances G11, G11A, and G11B in one heat transfer plate 50 shown in FIG. Therefore, the distance G11, the distance G11A, or the distance G11B may be measured at one location for one heat transfer plate 50. For example, the measurement of the distances G11 and G11B in the insertion hole groups 62A and 62C may be omitted, and only the distance G11A in the insertion hole group 62B may be measured. In this case, the structure of the distance measuring device 60 can be simplified.

  In the present embodiment, when the depth displayed on the display unit 75 of the depth meter 70 is X and the thickness of the main body 61 in the Y-axis direction is t, the distances G11, G12, G13, G11A, and G11B are: Calculated as Xt. A computer may be connected to the depth meter 70, and Xt data may be stored in the storage unit of the computer. In the present embodiment, the distances G11, G12, G13, G11A, and G11B can be measured simultaneously using a plurality of depth gauges 70. Alternatively, the distances G11, G12, G13, G11A, and G11B may be measured in order using one depth meter 70.

(Application amount calculation process)
Next, the application amount of the liquid heat transfer material corresponding to the distances G11, G12, G13, G11A, G11B is calculated (step S2 in FIG. 4). A computer may be connected to the depth gauge 70, and the application amount may be calculated by a computer that has received data from the depth gauge 70. For example, the coating amount VT for one heat transfer surface 50A may be calculated from the distances G11, G12, and G13. The coating amount VT for one heat transfer surface 50A may be the same as the volume calculated by multiplying the area of the heat transfer surface 50A by the distances G11, G12, and G13, or the volume may be multiplied by a predetermined coefficient. It may be a value. For example, regarding the coating amount VT corresponding to the distance G11, the width of the heat transfer surface 50A in the X-axis direction is W (see FIG. 6), and the length of the heat transfer surface 50A in the Z-axis direction is L (see FIG. 7). Sometimes calculated as W × L × G11. Similarly, the coating amount VT corresponding to the distance G12 is calculated as W × L × G12. The coating amount VT corresponding to the distance G13 is calculated as W × L × G13.

  As described above, variations in the distances G11, G11A, and G11B measured at a plurality of locations for one heat transfer plate 50 are relatively small. Therefore, the coating amount VT for one heat transfer surface 50A may be calculated using the distance G11A or the distance G11B instead of the distance G11. For example, a distance G11A (a distance measured in the insertion hole group 62B) that is the center in the Z-axis direction may be used. In this case, the volume calculated by multiplying the area W × L of the heat transfer surface 50A by the distance G11A is the coating amount VT for one heat transfer surface 50A. Further, an average value of the distances G11, G11A, and G11B may be used instead of the distance G11. In this case, the volume calculated by multiplying the area W × L of the heat transfer surface 50A by the average value (G11 + G11A + G11B) / 3 of the distances G11, G11A, G11B is the coating amount VT for one heat transfer surface 50A.

  Alternatively, the heat transfer surface 50A in the Z-axis direction may be divided into regions for each measurement location (for example, three locations), and the coating amount corresponding to the distances G11, G11A, and G11B may be calculated for each of the divided regions. For example, the coating amount corresponding to the distance G11 is calculated as W × (L × 1/3) × G11 = V1. Similarly, the coating amount corresponding to the distance G11A is calculated as W × (L × 1/3) × G11A = V2. Similarly, the coating amount corresponding to the distance G11B is calculated as W × (L × 1/3) × G11B = V3. Therefore, the coating amount VT for one heat transfer surface 50A is V1 + V2 + V3.

  Also, the coating amount VT on the heat transfer surface 40A located at the center of all the heat transfer surfaces 50A arranged in the X-axis direction is made larger than the coating amount VT on the heat transfer surface 50A located at the periphery. Also good. In this case, the thickness of the heat transfer layer 20 positioned in the central region of the power storage module 1 in the X-axis direction is larger than the thickness of the heat transfer layer 20 positioned in the peripheral region of the power storage module 1 in the X-axis direction. . Thereby, in the central region of the power storage module 1 in the X-axis direction, even if the power storage module 11 is bent by receiving the force in the Y-axis direction from the heat transfer layer 20, the power storage module 1 and the housing 3 It becomes difficult to form a gap between them.

(Application process of heat transfer material)
Next, as shown in FIG. 8 or FIG. 9, the calculated amount of heat transfer material is individually applied onto the heat transfer surface 50A (step S3 in FIG. 4). The heat transfer materials applied on the adjacent heat transfer surfaces 50A may be integrated after application, or may be separated.

  As shown in FIG. 8, the heat transfer material may be intermittently applied using a nozzle 80 that moves relative to the heat transfer surface 50 </ b> A along the X-axis direction. The heat transfer surface 50A may be fixed and the nozzle 80 may be moved along the X-axis direction, or the nozzle 80 may be fixed and the heat transfer surface 50A may be moved along the X-axis direction. The timing and amount of application of the heat transfer material are controlled by a computer connected to the nozzle 80. For example, the application timing is controlled so that the heat transfer material is applied to the centers P1, P2, P3... P12, P13 of each heat transfer surface 50A in the X-axis direction. Thereby, each heat transfer surface 50A can be reliably covered with the heat transfer material over the X-axis direction.

  In the present embodiment, since the plurality of nozzles 80 arranged in the Z-axis direction are used, the heat transfer material is applied at a plurality of locations on one heat transfer surface 50A. Since the distance measurement locations (three locations in this example) for one heat transfer surface 50A coincide with the application locations (three locations in this example), they correspond to the distances G11, G11A, G11B measured at each measurement location. The heat transfer materials of application amounts V1, V2, and V3 to be applied are applied at the respective application locations. In the Z-axis direction, the distance measurement points and the application points are equally arranged. Therefore, at the location where the distance G11 is measured, the heat transfer material of the application amount V1 = W × (L × 1/3) × G11 calculated in step S2 of FIG. 4 is applied from the first nozzle 80. Similarly, at the location where the distance G11A is measured, the heat transfer material of application amount V2 = W × (L × 1/3) × G11A calculated in step S2 of FIG. 4 is applied from the second nozzle 80. . Similarly, at the location where the distance G11B is measured, the heat transfer material of the application amount V3 = W × (L × 1/3) × G11B calculated in step S2 of FIG. 4 is applied from the third nozzle 80. . The coating amount VT for one heat transfer surface 50A is V1 + V2 + V3.

  When the coating amount VT for one heat transfer surface 50A is calculated instead of the coating amounts V1, V2, and V3 in the above-described coating amount calculation step (step S2 in FIG. 4), from one nozzle 80. The application amount of the heat transfer material to be discharged is a value (VT / 3 in this example) obtained by dividing the calculated application amount VT by the number of application portions.

  By using one nozzle 80 instead of the plurality of nozzles 80 and scanning the nozzle 80 a plurality of times (three times in this example) relative to the heat transfer surface 50A along the X-axis direction, May be applied. In this case, the number of nozzles 80 is minimized. The application amount at each application location may be the application amounts V1, V2, V3 corresponding to the distances G11, G11A, G11B measured at each measurement location, as in the case of using a plurality of nozzles 80, A value obtained by dividing the coating amount VT for one heat transfer surface 50A by the number of coating locations (VT / 3 in this example) may be used.

  Alternatively, as shown in FIG. 9, the heat transfer material may be applied using a plurality of nozzles 80 respectively corresponding to the plurality of power storage cells 11. For example, the heat transfer material is applied by moving the nozzle 80 relative to the heat transfer surface 50A along the Z-axis direction. The heat transfer surface 50A may be fixed and the nozzle 80 may be moved along the Z-axis direction, or the nozzle 80 may be fixed and the heat transfer surface 50A may be moved along the Z-axis direction. Further, when the length L of the heat transfer surface 50A in the Z-axis direction is short, the heat transfer surface 50A and the nozzle 80 need not be moved. The application amount of the heat transfer material discharged from each nozzle 80 is the application amount VT for one heat transfer surface 50A calculated in the above-described application amount calculation step (step S2 in FIG. 4).

  According to the method for manufacturing the power storage module of the present embodiment described above, each heat transfer is performed even when the distances G11, G12, G13, G11A, and G11B from the reference surface R to each heat transfer surface 50A are different. The application amount of the heat transfer material applied on the surface 50A can be controlled with high accuracy.

  As a result, for example, when the power storage module 1 is fixed to another member (for example, the housing 3 housing the power storage module 1 shown in FIG. 3), a gap is formed between the applied heat transfer material and the other member. Is less likely to occur. Therefore, the heat generated in each power storage cell 11 can be appropriately released from the heat transfer surface 50 </ b> A to another member via the heat transfer layer 20. Therefore, the power storage module 1 having high heat dissipation can be manufactured.

  In the present embodiment, the distances G11, G11A, and G11B are measured at a plurality of locations (for example, 3 locations) for each heat transfer plate 50 in step S1 of FIG. 4 (see FIG. 7). In this case, in one heat transfer plate 50, even when the distances G11, G11A, and G11B from the reference surface R to the heat transfer surface 50A are different depending on the location, the heat transfer applied on the heat transfer surface 50A. The amount of material applied can be controlled with high accuracy. For example, at the location where the distance G11 is measured, the heat transfer material of the application amount V1 = W × (L × 1/3) × G11 calculated in step S2 of FIG. 4 is applied. Similarly, at the location where the distance G11A is measured, the heat transfer material of application amount V2 = W × (L × 1/3) × G11A calculated in step S2 of FIG. 4 is applied. Similarly, in the place where the distance G11B is measured, the heat transfer material of the application amount V3 = W × (L × 1/3) × G11B calculated in step S2 of FIG. 4 is applied.

  In the step S3 of FIG. 4, when the heat transfer material is intermittently applied using the nozzle 80 that moves relative to the heat transfer surface 50A along the X-axis direction (see FIG. 8), the storage cell 11 The heat transfer material can be applied to each heat transfer surface 50A only by changing the moving distance of the nozzle 80 and the number of discharges of the heat transfer material. Therefore, it is not necessary to change the number of nozzles 80 according to the number of storage cells 11. Moreover, it can suppress that a heat-transfer material enters into the clearance gap between each heat-transfer surface 50A by apply | coating intermittently.

  In the step S3 of FIG. 4, when a heat transfer material is applied using a plurality of nozzles 80 respectively corresponding to the plurality of storage cells 11 (see FIG. 9), the heat transfer material is simultaneously applied on each heat transfer surface 50A. Therefore, the heat transfer material can be applied in a short time. Further, as compared with the case where the heat transfer material is applied intermittently, the positioning of the nozzle 80 is easier, and it is not necessary to control the timing of applying the heat transfer material from the nozzle 80 with high accuracy.

  Prior to step S1 in FIG. 4, a step of sandwiching the plurality of power storage cells 11 by the pair of end plates 16 and 16 may be further included. The coating amount can be controlled with high accuracy even for variations in the distances G11, G12, G13, G11A, and G11B caused by this process.

  After step S3 in FIG. 4, the heat transfer layer 20 may be formed by curing the heat transfer material in a state where the applied heat transfer material is connected to the housing 3 (see FIG. 3). Thereby, the electrical storage pack provided with the electrical storage module 1 and the housing | casing 3 is manufactured. The surface of the housing 3 coincides with the reference plane R.

  As mentioned above, although preferred embodiment of this invention was described in detail, this invention is not limited to the said embodiment.

  DESCRIPTION OF SYMBOLS 1 ... Power storage module, 11 ... Power storage cell, 50 ... Heat transfer plate (heat transfer member), 50A ... Heat transfer surface, 80 ... Nozzle, G11, G12, G13, G11A, G11B ... Distance, R ... Reference plane.

Claims (4)

A power storage module manufacturing method comprising: a plurality of power storage cells arranged in a first direction; and a heat transfer member connected to each of the plurality of power storage cells and having a heat transfer surface,
Measuring a distance from a reference surface disposed opposite to the heat transfer surface to the heat transfer surface;
Calculating a coating amount of the liquid heat transfer material corresponding to the distance;
Individually applying the calculated amount of the heat transfer material on the heat transfer surface;
A method for manufacturing a power storage module, comprising:   2. The heat transfer material is intermittently applied in the step of applying the heat transfer material using a nozzle that moves relative to the heat transfer surface along the first direction. Manufacturing method of the electrical storage module.   The method for manufacturing a power storage module according to claim 1, wherein in the step of applying the heat transfer material, the heat transfer material is applied using a plurality of nozzles respectively corresponding to the plurality of power storage cells.   The manufacturing method of the electrical storage module as described in any one of Claims 1-3 which measures the said distance in multiple places with respect to each heat-transfer member in the process of measuring the said distance.

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