Conductive module and power storage device

Abstract

A conductive module includes: a conductive plate; a voltage detection terminal having a first portion configured to be conductively connected to the conductive plate; the temperature measuring device comprises a temperature measuring element and a shell for holding the temperature measuring element; a plate-shaped housing assembled to the conductive plate, the housing having a terminal accommodating recess that accommodates the voltage detection terminal and a thermometer accommodating recess that accommodates the thermometer; the heat conduction filler is arranged in a groove of the thermoscope accommodating concave part; a cover configured to be locked to the housing at a temporary locking position where a first portion of the voltage detection terminal accommodated in the terminal accommodating recess is not covered and a final locking position where the first portion is covered; and an electric wire conductively connected to the second portion of the voltage detection terminal and led out to the outside of the housing.

Description

Technical Field

[0001] The present disclosure relates to a conductive module and a power storage device using the conductive module. The conductive module includes: a conductive plate as a detection target; and a plate-shaped housing that accommodates a voltage detection terminal and a temperature detector. Background Art

[0002] A stacked power storage device is proposed in the prior art, in which a plurality of thin power storage modules capable of charge and discharge are connected in series by means of conductive plates by alternately arranging and repeatedly stacking plate-shaped power storage modules and conductive plates. The power storage module used in this type of power storage device generally has a structure in which a plurality of battery cells are built in, and functions as one battery capable of charge and discharge.

[0003] In a power storage device in the prior art, in order to monitor the output state of each power storage module (i.e., the potential of the output surface of each power storage module relative to the zero potential serving as a reference, hereinafter referred to as "the voltage of the power storage module"), a detection terminal such as a bus bar is connected to a conductive plate in contact with the output surface of the power storage module, and the voltage of the power storage module is measured through the detection terminal (for example, see JP2020-161340A).

[0004] However, when actually connecting the busbar and the like to the conductive plate in the power storage device having the above-mentioned structure, since the power storage module and the conductive plate are in the shape of thin plates, it is difficult to ensure space for installing other components for connection (for example, bolts for bolt fastening, etc.). Therefore, the power storage device of the above-mentioned prior art is provided with an insertion hole for inserting the detection terminal in the side edge portion of each conductive plate. The detection terminal is inserted into the insertion hole of the conductive plate from the side of the stacked body in which the power storage module and the conductive plate are stacked, thereby connecting the conductive plate to the detection terminal. However, according to this connection method of the prior art, when inserting the detection terminal, the positioning between the insertion hole of the conductive plate and the detection terminal is complicated, making it difficult to improve the operability of the connection operation. Summary of the invention

[0005] An object of the present disclosure is to provide a conductive module having excellent operability in conductive connection with a detection target, and a power storage device using the conductive module.

[0006] In order to achieve the above-mentioned object, the conductive module and the power storage device according to the present disclosure are characterized as follows.

[0007] According to one aspect of the present disclosure, there is provided a conductive module, comprising: a conductive plate; a voltage detection terminal having a first portion configured to be conductively connected to the conductive plate; a thermometer including a thermometer element and a housing for holding the thermometer element; a plate-shaped housing assembled to the conductive plate, the housing having a terminal accommodating recess for accommodating the voltage detection terminal and a thermometer accommodating recess for accommodating the thermometer; a thermally conductive filler arranged in a groove of the thermometer accommodating recess; a cover configured to be locked to the housing at a temporary locking position in which the first portion of the voltage detection terminal accommodated in the terminal accommodating recess is not covered and a final locking position in which the first portion is covered; and an electric wire conductively connected to a second portion of the voltage detection terminal and led out to the outside of the housing, wherein: the housing is configured so that a portion of the conductive plate is exposed in the groove of the thermometer accommodating recess, and the filler contacts both the thermometer element and the portion of the conductive plate.

[0008] According to another aspect of the present disclosure, there is provided a power storage device including: a conductive module; and a power storage module configured to be capable of charge and discharge, the conductive module being stacked on the power storage module.

[0009] According to the conductive module and the power storage device disclosed in the present invention, the cover can be locked to the housing while the voltage detection terminal connected to the electric wire at its second part is accommodated in the terminal accommodating recess of the housing and the first part of the voltage detection terminal is exposed. Therefore, when the voltage detection unit is electrically connected to the detection target (for example, a conductive plate used in a stacked power storage device, etc.), for example, after the voltage detection unit is assembled to the detection target, the exposed first part of the voltage detection terminal can be fixed to the detection target using a method such as ultrasonic bonding or welding. Compared with typical bolt fastening, etc., this does not require other components for connection, and compared with the above-mentioned prior art connection method, it is possible to easily align the two components and reduce the contact resistance at the contact point. By arranging the cover in the final locking position after the detection target is connected to the voltage detection terminal, the first part of the voltage detection terminal (that is, the contact point between the detection target and the voltage detection terminal) can be covered and protected by the cover.

[0010] In addition, the thermometer is accommodated in the thermometer accommodating recess of the housing, so that the temperature measuring element of the thermometer and a portion of the conductive plate exposed in the groove of the thermometer accommodating recess are both arranged in the groove. At the same time, a thermally conductive filler (for example, a sealing material that is flexible when filled and hardens over time) is arranged in the groove to contact both the temperature measuring element and a portion of the conductive plate. As a result, compared with the case where the temperature measuring element and the conductive plate are simply arranged adjacent to each other, it is less likely that there will be an air layer that hinders heat conduction between them. As a result, the thermometer can accurately measure the temperature of the conductive plate (in other words, for example, the temperature of the storage module conducted through the conductive plate in the stacked storage device).

[0011] Therefore, the conductive module and the power storage device according to the present disclosure are excellent in operability of conductive connection to the detection target. In addition, the conductive module and the power storage device according to the present disclosure can improve the accuracy of the temperature measured by the temperature detector.

[0012] The present disclosure has been briefly described above. In addition, the details of the present disclosure can be clarified by reading the following mode for implementing the present disclosure (hereinafter referred to as "embodiment") described with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present disclosure can be more fully understood from the accompanying drawings and the detailed description given below, which are given by way of illustration only and therefore are not intended to limit the present disclosure, and in which:

[0014] Figure 1 is a partially exploded perspective view showing a stacked power storage device including a conductive module according to an embodiment of the present disclosure;

[0015] Figure 2 is along Figure 1 A cross-sectional view taken along line AA;

[0016] Figure 3 yes Figure 2 Enlarged view of the middle part B;

[0017] Figure 4 It is composed Figure 1 An exploded perspective view of a voltage detection unit of the conductive module shown;

[0018] Figure 5 is a top view showing a state in which the cover is locked to the first housing at a final locking position;

[0019] Figure 6 is along Figure 5 A cross-sectional view taken along line CC;

[0020] Figure 7 It shows the composition Figure 1A three-dimensional view of the conductive plate, the second housing and the thermistor of the conductive module shown;

[0021] Figure 8 yes Figure 7 A perspective view of the thermistor shown;

[0022] Fig. 9 yes Figure 7 Front view of the thermistor shown;

[0023] Fig.10 is a top view showing a state where the thermistor is accommodated in the second housing;

[0024] Fig.11 The sealing material is applied to the Fig.10 The upper surface of the second shell shown and filled with Fig.10 A perspective view of a state where the thermistor is accommodated in a recessed portion;

[0025] Fig.12 The sealing material is applied to the Fig.10 The upper surface of the second shell shown and filled with Fig.10 A top view of the state in which the thermistor is accommodated in the groove of the recessed portion;

[0026] Fig.13 is along Fig.12 A cross-sectional view taken along line DD in FIG. 1 ; and

[0027] Fig.14 is along Fig.12 A cross-sectional view taken along line AA in FIG. DETAILED DESCRIPTION

[0028] <Example>

[0029] Hereinafter, the conductive module 103 and the power storage device 101 using the conductive module 103 according to the embodiment of the present disclosure will be described with reference to the accompanying drawings. Hereinafter, for the convenience of description, “front”, “rear”, “up”, “down”, “left”, “right”, “front-rear direction”, “left-right direction” and “up-down direction” are referred to as “front-rear direction”. Figure 1 The "front-rear direction", "left-right direction" and "up-down direction" are orthogonal to each other.

[0030] like Figure 1As shown, the power storage device 101 is formed by stacking rectangular thin plate-shaped power storage modules 102 capable of charge and discharge alternately in the up-down direction and rectangular thin plate-shaped conductive modules 103 capable of electrically connecting adjacent power storage modules 102. In the power storage device 101, a plurality of power storage modules 102 are electrically connected in series via the conductive modules 103. Each power storage module 102 has a structure in which a plurality of battery cells (not shown) are built in, and the power storage module 102 as a whole functions as one battery capable of charge and discharge.

[0031] like Figure 1 As shown, each conductive module 103 is formed into a rectangular thin plate shape by a rectangular thin plate-shaped conductive plate 104 (the conductive plate 104 also serves as a heat sink as described below), a rectangular thin plate-shaped voltage detection unit 105 connected to the right side of the conductive plate 104, and a rectangular thin plate-shaped temperature detection unit 106 connected to the left side of the conductive plate 104. Figures 1 to 3 As shown (specifically, see Figure 2 ), the conductive plate 104 and the voltage detection unit 105 are connected to each other by fitting the flange 104a into the recess 105a. The flange 104a is provided on the right end surface of the conductive plate 104 and extends in the front-to-back direction. The recess 105a is provided on the left end surface of the voltage detection unit 105 and extends in the front-to-back direction. The conductive plate 104 and the temperature detection unit 106 are connected to each other by fitting the flange 104b into the recess 106a. The flange 104b is provided on the left end surface of the conductive plate 104 and extends in the front-to-back direction. The recess 106a is provided on the right end surface of the temperature detection unit 106 and extends in the front-to-back direction.

[0032] In each conductive module 103 located between the power storage modules 102 adjacent to each other in the vertical direction, the conductive plate 104 is in direct contact with the upper and lower power storage modules 102, such as Figure 2 Therefore, the conductive plate 104 is used to conduct electricity between the lower surface of the upper power storage module 102 and the upper surface of the lower power storage module 102, and serves as a heat sink for releasing heat generated from the upper and lower power storage modules 102 to the outside.

[0033] In each conductive module 103 located between the power storage modules 102 adjacent in the up-down direction, the voltage detection unit 105 includes a voltage detection terminal 110 (see FIG. 1 ) to be described below that contacts the conductive plate 104. Figure 2 The voltage detection unit 105 has a wire 120 connected to the voltage detection terminal 110 (see Figure 1 The function of outputting a signal indicating the voltage between the upper and lower power storage modules 102 (specifically, the potential of the upper surface (output surface) of the lower power storage module 102 relative to the zero potential serving as a reference) is provided.

[0034] In each conductive module 103 located between the power storage modules 102 adjacent to each other in the up-down direction, the temperature detection unit 106 includes a thermistor 170 (see FIG. 1 ) to be described later adjacent to a portion of the conductive plate 104 (more specifically, the flange 104 b). Figure 1 , Fig.10 The function of the temperature detection unit 106 is to connect the thermistor 170 to the wire 190 (see Figure 1 The controller 100 outputs a signal indicating the temperature of the conductive plate 104 (and thus the power storage module 102 in contact with the upper and lower surfaces of the conductive plate 104).

[0035] Next, refer to Figures 4 to 6 The specific configuration of the voltage detection unit 105 is described below. Figure 4 As shown, the voltage detection unit 105 includes a first housing 140 , a voltage detection terminal 110 accommodated in the first housing 140 , an electric wire 120 connected to the voltage detection terminal 110 and accommodated in the first housing 140 , and a cover 130 mounted to the first housing 140 .

[0036] The voltage detection terminal 110 is accommodated in a terminal accommodation recess 142 (see FIG. 140 ) formed in the first housing 140 and described below. Figure 4 The electric wire 120 is accommodated in an electric wire accommodation recess 146 (see Figure 4 The cover 130 is mounted in a cover mounting recess 141 (see FIG. 14A ) formed in the first housing 140 and described below. Figure 4 ). Hereinafter, components constituting the voltage detection unit 105 will be described in sequence.

[0037] First, the voltage detection terminal 110 will be described. The voltage detection terminal 110 made of metal is formed by processing a metal plate by punching or the like. The voltage detection terminal 110 is accommodated in the terminal accommodation recess 142 of the first housing 140 from above. Figure 4 As shown in the figure, the voltage detection terminal 110 includes a rectangular flat plate-shaped first portion 111 extending in the front-to-back direction and a rectangular flat plate-shaped second portion 112 extending leftward from the front end of the first portion 111, and is generally L-shaped when viewed in the top-bottom direction.

[0038] One end of the wire 120 is fixed and electrically connected to the lower surface of the terminal portion 111a (i.e., the end closer to the rear end) of the first portion 111. The other end of the wire 120 is to be connected to a voltage measuring device (not shown) outside the power storage device 101. A portion of the flange 104a of the conductive plate 104 is fixed to the lower surface of the terminal portion 112a (i.e., the end closer to the left end) of the second portion 112 by a method such as ultrasonic bonding or welding (see FIG. 1 ). Figure 3 ).

[0039] The front edge of the second portion 112 is formed with a protrusion 113 protruding forward. When the voltage detection terminal 110 is accommodated in the first housing 140, the protrusion 113 will be locked in the locking groove 145 (see FIG. 145 ) formed in the first housing 140. Figure 4 )middle.

[0040] Next, the cover 130 will be described. The cover 130 is a resin molded part and is mounted to the cover mounting recess 141 of the first housing 140 from the right side. The cover 130 includes a facing portion 131 and an extending portion 132 extending rearward from the facing portion 131. The facing portion 131 is mainly used to cover and protect the voltage detection terminal 110, and the extending portion 132 is mainly used to cover and protect the electric wire 120.

[0041] The facing portion 131 includes a pair of flat plates 133 and a connecting portion 134, the pair of flat plates 133 have the same shape and face each other at a certain interval in the up-down direction, and the connecting portion 134 connects the right end edges of the pair of flat plates 133 extending in the up-down direction in the entire area in the front-back direction. The facing portion 131 has a leftward opening that is approximately U-shaped when viewed in the front-back direction. Each flat plate 133 includes a base 133a in the shape of a substantially square flat plate continuous with the connecting portion 134 and an extension 133b in the shape of a rectangular flat plate extending to the left from the front end of the base 133a, and is generally L-shaped as a whole when viewed in the up-down direction. The extension 132 extends forward from the rear end edge of the upper side flat plate 133 (more specifically, the upper side base 133a) of the pair of flat plates 133 constituting the facing portion 131 in a flush and continuous manner, and is in the shape of a substantially rectangular flat plate.

[0042] The extension portion 132 is integrally formed with two wire holding pieces 135 extending in the left-right direction, and the two wire holding pieces 135 are arranged at intervals in the front-rear direction. Each wire holding piece 135 protrudes downward from the lower surface of the extension portion 132 and extends in the left-right direction to further protrude leftward from the left end edge of the extension portion 132. When the cover 130 is mounted on the first housing 140, the wire holding piece 135 holds the wires 120 accommodated in the first housing 140.

[0043] The lower side plate 133 (more specifically, the lower side base 133a) of the pair of plates 133 constituting the facing portion 131 is formed with a locking portion 136 that protrudes upward toward the upper side plate 133 at a predetermined position (see Figure 6 The locking portion 136 is used to cooperate with a temporary locked portion 154 and a final locked portion 155 provided in the first housing 140 to be described below, and lock the cover 130 to a temporary locked position (not shown) and a final locked position (see FIG. Figure 5 and 6 ).

[0044] Next, the first housing 140 will be described. The first housing 140 is a resin molded part and is as shown in FIG. Figure 1 and 4 The first housing 140 is shown as a generally rectangular thin plate extending in the front-to-back direction. The left end surface of the first housing 140 is formed with a recess 105a that is recessed to the right and extends in the front-to-back direction. The flange 104a of the conductive plate 104 will fit into the recess 105a (see Figure 2 ,wait).

[0045] The positions where the cover 130 is installed on the upper and lower surfaces of the first housing 140 are respectively formed with cover installation recesses 141, and the cover installation recesses 141 are recessed into a shape corresponding to the overall shape of the cover 130 (see FIG. Figure 4 ). The recessed depth (depth in the up-down direction) of the cover mounting recess 141 is equal to the plate thickness of the resin material constituting the cover 130 (opposing portion 131 + extending portion 132). Therefore, when the cover 130 is mounted on the first housing 140, the surface of the first housing 140 is flush with the surface of the cover 130 (see FIG. Figure 1 and 5 ).

[0046] A terminal receiving recess 142 is formed at a position on the upper surface of the first housing 140 where the voltage detection terminal 110 is received on the bottom surface 141a of the cover mounting recess 141. The terminal receiving recess 142 is further recessed into a shape corresponding to the overall shape of the voltage detection terminal 110 (see FIG. Figure 4 ). The recessed depth (depth in the up-down direction) of the terminal accommodating recess 142 is equal to the plate thickness of the voltage detection terminal 110. Therefore, when the voltage detection terminal 110 is mounted on the first housing 140, the upper surface of the voltage detection terminal 110 is flush with the bottom surface 141a of the cover mounting recess 141.

[0047] A notch 143 is formed at the position where the terminal portion 112a of the voltage detection terminal 110 is arranged in the front-to-back direction of the left end edge of the first housing 140, and when viewed from the top-to-bottom direction, the notch 143 is recessed to the right in a substantially rectangular shape. The recess 105a extending in the front-to-back direction on the left end surface of the first housing 140 is separated by the notch 143. When the voltage detection terminal 110 is accommodated in the first housing 140, the upper surface and the lower surface of the terminal portion 112a of the voltage detection terminal 110 will be exposed through the notch 143.

[0048] A through hole 144 extending in the front-to-rear direction and penetrating in the up-down direction is formed at a position where the terminal end portion 111a of the voltage detection terminal 110 is arranged in the terminal accommodating recess 142. When the voltage detection terminal 110 is accommodated in the first housing 140, one end (contact point) of the electric wire 120 connected to the voltage detection terminal 110 enters the through hole 144. In other words, the through hole 144 serves as a gap to avoid interference between the bottom surface 142a of the terminal accommodating recess 142 and one end of the electric wire 120.

[0049] The protrusion 113 of the voltage detection terminal 110 is arranged in the terminal receiving recess 142 (see Figure 4 ) is formed on the inner wall surface of the position of the locking groove 145 which is concave forward and communicates with the recess 105a to correspond to the protrusion 113 (see Figure 4 ).

[0050] A wire receiving recess 146 is formed on the upper surface of the first housing 140 at a position where the wire 120 is received. The shape of the wire receiving recess 146 corresponds to the wiring form of the wire 120 when the wire 120 is received (see FIG. Figure 4 ). The wire accommodating recess 146 is a continuous groove including: a pair of straight portions 147 extending straightly in the front-back direction and arranged at intervals in the front-back direction; and a curved portion 148 connecting the pair of straight portions 147 and extending while being curved protrudingly to the right. The front ends of the front-side straight portions 147 of the pair of straight portions 147 are communicated with the terminal accommodating recess 142, and the rear ends of the rear-side straight portions 147 of the pair of straight portions 147 constitute a wire outlet 149 through which the wire 120 extends from the rear end edge of the first housing 140. In this way, since the wire accommodating recess 146 has the curved portion 148, even if an unexpected external force is applied to the wire 120 drawn out from the first housing 140, the wire 120 can resist the external force by friction between the curved portion 148 and the wire 120, compared with the case where the wire accommodating recess 146 is formed only by the straight portion 147. Therefore, it is difficult for a large external force to be applied to the contact point between the voltage detection terminal 110 and the wire 120.

[0051] A narrow recess 151 is provided at a position adjacent to the boundary of each of the pair of straight portions 147 and the curved portion 148, and the narrow recess 151 is a recess having a width (interval in the left-right direction) narrower than the width of the straight portion 147. The width of the narrow recess 151 is slightly smaller than the outer diameter of the electric wire 120. Therefore, the electric wire 120 is clamped while being pressed in the left-right direction. By clamping the electric wire 120 between the pair of narrow recesses 151, even if an unexpected external force is applied to the electric wire 120 drawn out from the first housing 140, the external force can be resisted by the friction between the narrow recess 151 and the electric wire 120. Therefore, it is difficult for a large external force to be applied to the contact point between the voltage detection terminal 110 and the electric wire 120. In addition, it is possible to effectively prevent the electric wire 120 from being routed in a manner of escaping from the curved portion 148 and crossing the curved portion 148 (i.e., cutting through the curved portion 148).

[0052] like Figure 4 As shown, a pair of wire holding piece recesses 152 are formed at positions where the pair of wire holding pieces 135 of the cover 130 are arranged on the bottom surface 141a of the cover mounting recess 141 on the upper surface of the first housing 140, and extend in the left-right direction in a manner spaced apart in the front-to-back direction to correspond to the pair of wire holding pieces 135. The pair of wire holding piece recesses 152 sandwich the curved apex 148a of the curved portion 148 of the wire accommodating recess 146 in the front-to-back direction (see Figure 4 The bottom surfaces of the pair of wire holding piece recesses 152 are located above the bottom surface of the wire accommodating recess 146 .

[0053] The wire holding piece recess 152 extends in the left-right direction from the right end edge of the upper surface of the first housing 140 across the wire accommodating recess 146 to the left inner wall 141b of the cover mounting recess 141 (see FIG. Figure 4 A storage hole 153 is formed at each position where a pair of wire holding piece recesses 152 are connected on the left inner wall 141b of the cover mounting recess 141 and is recessed to the left (see FIG. Figure 4 When the cover 130 is mounted on the first housing 140 , the extended ends (ie, the left ends) of the pair of wire holding pieces 135 of the cover 130 will be inserted into and stored in the pair of storage holes 153 .

[0054] like Figure 6 As shown, at the same position in the front-rear direction as the position where the locking portion 136 of the cover 130 is arranged on the bottom surface 141a of the cover mounting recess 141 in the lower surface of the first housing 140, a temporary locked portion 154 and a final locked portion 155 are formed in sequence at intervals from right to left, and the temporary locked portion 154 and the final locked portion 155 are recessed portions that are recessed upward. The components constituting the voltage detection unit 105 have been described above.

[0055] Next, refer to Figures 7 to 14The specific configuration of the temperature detection unit 106 is described below. Figure 7 As shown, the temperature detection unit 106 includes a second housing 160, a thermistor 170 accommodated in the second housing 160, and an electric wire 190 connected to the thermistor 170. The thermistor 170 is accommodated in a thermistor accommodation recess 161 (see FIG. 1 ) formed in the second housing 160 and described below. Figure 7 , etc.). Hereinafter, the components constituting the temperature detection unit 106 will be described in sequence. The thermistor 170 corresponds to the "temperature detector" in the present disclosure, and the thermistor element 171 corresponds to the "temperature measuring element" in the present disclosure.

[0056] First, the second housing 160 will be described. The second housing 160 is a resin molded part, and Figure 1 , Figure 7 The second housing 160 has a substantially rectangular thin plate shape extending in the front-to-rear direction. The right end surface of the second housing 160 is formed with a recess 106a (see Figure 2 , Fig.13 and Fig.14 ). The flange 104b of the conductive plate 104 will fit into the recess 106a (see Figure 2 , Fig.13 and Fig.14 ).

[0057] A thermistor accommodating recess 161 is formed on the upper surface near the rear end of the second housing 160 extending in the front-rear direction. The thermistor accommodating recess 161 has a shape corresponding to the overall shape of the thermistor 170 (see FIG. Figure 7 ). The recessed depth (depth in the vertical direction) of the thermistor accommodating recess 161 corresponds to the thickness (length in the vertical direction) of the thermistor 170. Thus, when the thermistor 170 is mounted on the second housing 160, the surface of the second housing 160 is flush with the surface of the thermistor 170 (see Figure 1 , Fig.10 wait).

[0058] like Figure 7 As shown in the figures, the thermistor accommodating recess 161 includes a first recess 162 extending in the left-right direction and a second recess 163 extending from the left end of the first recess 162 to the left and rearward (hereinafter referred to as the "length direction"). The right end of the first recess 162 is connected to a portion of the recess 106a in the front-to-back direction extending in the front-to-back direction of the second housing 160. Therefore, by fitting the flange 104b of the conductive plate 104 into the recess 106a, a portion of the flange 104b of the conductive plate 104 in the front-to-back direction (hereinafter also referred to as "a portion 104b of the conductive plate 104") is exposed in the groove at the right end of the first recess 162 (see Figure 7 and 10).

[0059] like Figure 7 As shown in FIG. 1 , one end of the second recess 163 extending in the length direction is connected to the left end of the first recess 162, and the other end of the second recess 163 in the length direction is connected to the outside of the second housing 160 via the connecting recess 164. The recess depth (depth in the up-down direction) of the first recess 162 is smaller than the recess depth (depth in the up-down direction) of the second recess 163 (see FIG. 1 ). Fig.13 The bottom surface of the first recess 162 is continuous with the lower inner wall surface of the recess 106a without any step (see Fig.13 A through hole 165 is formed in the center of the bottom surface of the second recess 163 in the longitudinal direction. The through hole 165 penetrates in the up-down direction and has a shape similar to a pair of retaining portions 174 (more specifically, a pair of lateral walls 176; see FIG. 1 ) provided in a housing 172 of the thermistor 170 described below. Figure 8 etc.) (see Figure 7 In the inner surface of both sides of the second recess 163, locking holes 166 are formed at four positions adjacent to the front and rear sides of the through hole 165. The locking holes 166 are recessed outward in the width direction (orthogonal to the length direction) of the second recess 163, corresponding to the four locking protrusions 179 (see FIG. 179 ) provided on the housing 172 of the thermistor 170. Figure 7 wait).

[0060] Next, the thermistor 170 will be described. Fig.10 As shown, the thermistor 170 is accommodated in the second recess 163 of the thermistor accommodating recess 161. Therefore, the thermistor 170 has a shape whose length direction corresponds to the length direction of the second recess 163, and the thermistor 170 includes a thermistor element 171 constituting a temperature measuring element and a housing 172 (see FIG. 1 ) for holding the thermistor element 171. Figure 7 , Figure 8 In this example, the thermistor element 171 has a substantially rectangular parallelepiped shape extending in the length direction (see Figure 8 The electric wire 190 extends from the other end of the thermistor element 171 in the longitudinal direction.

[0061] The housing 172 is made of resin and Figure 8 As shown in FIG. 1 , the top plate 173 includes a rectangular flat plate-shaped top plate 173 extending in the length direction and a pair of retaining portions 174 extending downward from the center of the length direction of two edges in the width direction of the top plate 173. When the thermistor 170 is accommodated in the second recess 163, the top plate 173 is used to close the opening of the second recess 163 of the thermistor accommodation recess 161 (see FIG. Fig.10The pair of holding portions 174 has a function of holding the thermistor element 171 .

[0062] More specifically, if Figure 8 and Fig. 9 As shown, the pair of retaining portions 174 includes: a pair of flat plate-like vertical walls 175, which extend downward from two edges in the width direction of the top plate 173; and a pair of flat plate-like lateral walls 176, which extend inward in the width direction from the extended ends (lower ends) of the pair of vertical walls 175. There is a gap in the width direction between the extended ends (inner ends in the width direction) of the pair of lateral walls 176. The pair of retaining portions 174 are provided with a pair of flat plate-like inner walls 177 extending in the up-down direction and the width direction to connect the rear end edges of the pair of lateral walls 176 and the top plate 173 in the up-down direction, and to the rear end edges of the pair of vertical walls 175 (see Fig. 9 There is also a gap in the width direction between the inner ends of the pair of inner walls 177 in the width direction. In addition, the pair of retaining portions 174 are provided with a pair of locking protrusions 178 for locking the thermistor element 171 in a manner extending inwardly in the width direction from the inner side surfaces of the pair of vertical walls 175 in the width direction (see Fig. 9 ).

[0063] Four locking protrusions 179 are formed at four positions adjacent to the front and rear sides of a pair of retaining portions 174 arranged at two side edges in the width direction of the top plate 173, and protrude downward. A pair of flat plate-shaped rear walls 181 are formed at both ends in the width direction of the rear end edge of the top plate 173 and protrude downward. In addition, a flat plate-shaped extension plate 182 is formed at the central portion in the width direction of the rear end edge of the top plate 173 and extends further backward. When the thermistor 170 is accommodated in the second recess 163 of the thermistor accommodating recess 161, the extension plate 182 is used to close the opening of the communicating recess 164 (see FIG. 1 ). Fig.10 wait).

[0064] In order to assemble the thermistor element 171 to the housing 172 (to hold the thermistor element 171 in a pair of holding portions 174 of the housing 172), first, in a state where the entire thermistor element 171 is arranged on one side in the length direction relative to the pair of holding portions 174, the wire 190 extending backward from the thermistor element 171 is inserted into the gap between the pair of lateral walls 176 and the pair of inner walls 177 and the gap between the pair of rear walls 181. Next, the thermistor element 171 is inserted from one side to the other side in the length direction into the space defined by the pair of holding portions 174 (=vertical wall 175+lateral wall 176). During this insertion process, while a pair of locking protrusions 178 slide on the outer surfaces of both sides of the thermistor element 171, the thermistor element 171 moves in the space relative to the other side in the length direction. When the end of the thermistor element 171 on the other side in the length direction comes into contact with the pair of inner walls 177, the thermistor element 172 is completely assembled to the housing 172, and the thermistor element 171 is locked and held while being clamped between the pair of locking protrusions 178 in the width direction (see FIG. Figure 8 and Fig. 9 ). When the thermistor element 171 is completely assembled to the housing 172, as shown in FIG. Figure 7 , Figure 8 As shown in FIG. 1 , one end of the thermistor element 171 in the longitudinal direction protrudes from one end of the housing 172 (more specifically, the top plate 173) in the longitudinal direction to one side in the longitudinal direction and is exposed to the outside. The components constituting the temperature detection unit 106 have been described above.

[0065] Next, a process for assembling the conductive module 103 will be described. First, a process for assembling the voltage detection unit 105 to the conductive plate 104 will be described. In order to assemble the voltage detection unit 105 to the conductive plate 104, first, the voltage detection terminal 110 and the cover 130 are assembled to the first housing 140 to complete the voltage detection unit 105. Thereafter, the completed voltage detection unit 105 is connected to the conductive plate 104.

[0066] In order to assemble the voltage detection terminal 110 and the cover 130 to the first housing 140, first, the voltage detection terminal 110 connected to the electric wire 120 in advance by a method such as ultrasonic bonding or welding is accommodated in the terminal accommodation recess 142 of the first housing 140. Thus, the voltage detection terminal 110 is fitted into the terminal accommodation recess 142 of the first housing 140 from above so that the protrusion 113 enters the locking groove 145 and one end (contact point) of the electric wire 120 enters the through hole 144. In a state where the voltage detection terminal 110 is completely accommodated in the first housing 140, the upper surface and the lower surface of the terminal portion 112a of the voltage detection terminal 110 are exposed through the notch 143.

[0067] Next, the electric wire 120 extending from the voltage detection terminal 110 accommodated in the first housing 140 is accommodated in the electric wire accommodation recess 146 of the first housing 140. Therefore, the electric wire 120 is fitted from above along the electric wire accommodation recess 146 constituted by a pair of straight portions 147 and a curved portion 148. At this time, a pair of portions of the electric wire 120 located at the upper portion of the pair of narrow recesses 151 are pushed downward so that the pair of portions of the electric wire 120 are accommodated in the pair of narrow recesses 151. In a state where the electric wire 120 is completely accommodated in the first housing 140, the electric wire 120 extends rearward from the electric wire outlet 149 to the outside of the first housing 140.

[0068] Next, the cover 130 is mounted on the first housing 140. Thus, the cover 130 is mounted on the cover mounting recess 141 of the first housing 140 from the right side so that the facing portion 131 of the cover 130 clamps the cover mounting recess 141 in the upper and lower surfaces of the first housing 140 in the up-down direction, the extending portion 132 of the cover 130 covers the cover mounting recess 141 in the upper surface of the first housing 140, and the pair of wire holding pieces 135 of the cover 130 are accommodated in the pair of wire holding piece recesses 152 of the first housing 140.

[0069] In the process of installing the cover 130 to the first shell 140, the locking portion 136 of the cover 130 first slides on the bottom surface 141a of the cover installation recess 141 in the lower surface of the first shell 140, and then enters the temporary locked portion 154 and engages with the temporary locked portion 154. Therefore, the cover 130 is locked to the first shell 140 at the temporary locked position, and the cover 130 is completely installed in the first shell 140 to obtain the voltage detection unit 105. As described later, the voltage detection unit 105 obtained after the cover 130 is completely installed in the first shell 140 (in a state where the cover 130 is locked at the temporary locked position) is used to assemble the conductive module 103 (see Figure 1 ).

[0070] When the cover 130 is locked at the temporary locking position, the facing portion 131 of the cover 130 (more specifically, a pair of upper and lower extensions 133b) does not cover the terminal portion 112a of the voltage detection terminal 110. Therefore, the upper and lower surfaces of the terminal portion 112a of the voltage detection terminal 110 are also exposed through the notch 143.

[0071] In addition, a pair of wire holding pieces 135 of the cover 130 are arranged above the opening of a portion of the straight portion 147 and the curved portion 148 of the wire accommodating recess 146. This prevents the wire 120 from coming out of the wire accommodating recess 146. Further, the extended ends of the pair of wire holding pieces 135 are accommodated in the pair of storage holes 153. Therefore, it is possible to prevent accidental deformation, such as misalignment of the pair of wire holding pieces 135 or separation of the pair of wire holding pieces 135 from the wire accommodating recess 146. In addition, the extension portion 132 of the cover 130 is arranged above the opening of the bending vertex of the curved portion 148 of the wire accommodating recess 146. Thus, it is possible to effectively prevent the wire 120 from being routed in a manner of coming out of the wire accommodating recess 146 and crossing the curved portion 148 (i.e., cutting through the curved portion 148). In this way, it is possible to reduce the possibility of a specific fault occurring due to the wire 120 coming out of the curved portion 148 of the wire accommodating recess 146.

[0072] When the cover 130 is further pushed to the left relative to the first housing 140 in a state where the cover 130 is locked in the temporary locking position, the extended ends of the pair of wire holding pieces 135 of the cover 130 further enter and are stored in the pair of storage holes 153. At the same time, the locking portion 136 of the cover 130 passes over the temporary locked portion 154 and then enters the interior of the final locked portion 155 and engages with the final locked portion 155 (see FIG. Figure 6 ). Thus, the cover 130 is locked to the first housing 140 at the final locking position.

[0073] In a state where the cover 130 is locked at the final locking position, as shown in FIG. Figure 5 and Figure 6 As shown, the entire cover mounting recess 141 is covered by the cover 130, and thus the entire wire accommodating recess 146 is covered by the extension 132 of the cover 130. This prevents the wire 120 from coming out of the wire accommodating recess 146. Figure 6 As shown, the facing portion 131 of the cover 130 (more specifically, a pair of upper and lower extension portions 133b) covers the upper and lower surfaces of the terminal portion 112a of the voltage detection terminal 110. Therefore, the entire voltage detection terminal 110 is covered by the facing portion 131 of the cover 130, so that the voltage detection terminal 110 can be reliably protected.

[0074] As described above, the voltage detection unit 105 obtained after the cover 130 is completely installed in the first housing 140 (in a state where the cover 130 is locked at the temporary locking position) is used to assemble the conductive module 103 (see Figure 1 ). Specifically, first, Figure 2 and Figure 3 As shown, the flange 104 a of the conductive plate 104 is fitted into the recess 105 a of the voltage detection unit 105 , so that the voltage detection unit 105 is coupled to the right side of the conductive plate 104 .

[0075] In this state, from Figure 3 It can be understood that due to the presence of the recess 143 of the first shell 140, a portion of the flange 104a of the conductive plate 104 overlaps with the lower side of the end portion 112a of the voltage detection terminal 110, and the upper surface of the end portion 112a of the voltage detection terminal 110 is exposed upward, and the lower surface of a portion of the flange 104a of the conductive plate 104 is exposed downward.

[0076] Next, the upper surface of the terminal portion 112a of the voltage detection terminal 110 exposed upward and the lower surface of a portion of the flange 104a of the conductive plate 104 exposed downward are used to fix the terminal portion 112a of the voltage detection terminal 110 and a portion of the flange 104a of the conductive plate 104 by a method such as ultrasonic bonding or welding. Thereafter, the cover 130 is moved from the temporary locking position to the final locking position, and the voltage detection unit 105 is completely assembled to the conductive plate 104.

[0077] Next, a process for assembling the temperature detection unit 106 to the conductive plate 104 will be described. To assemble the temperature detection unit 106 to the conductive plate 104, first, the second housing 160 is coupled to the conductive plate 104. Thereafter, the thermistor 170 is assembled to the second housing 160.

[0078] In order to connect the second housing 160 to the conductive plate 104, as shown in FIG. Figure 7 As shown, the flange 104b of the conductive plate 104 is fitted into the groove 106a of the second housing 160. Thus, the second housing 160 is connected to the left side of the conductive plate 104. When the conductive plate 104 and the second housing 160 are connected to each other, the right end of the first recess 162 of the thermistor accommodating recess 161 is connected to a portion of the recess 106a in the front-rear direction, so that a portion 104b of the conductive plate 104 is exposed in the groove at the right end of the first recess 161 (see Figure 7 and Fig.10 ).

[0079] Next, the thermistor 170 is assembled to the second housing 160. Therefore, the housing 172 holding the thermistor element 171 is fitted into the second recess 163 from above, so that the pair of holding portions 174 (more specifically, the pair of lateral walls 176) of the housing 172 enter the through hole 165, the top plate 173 closes the opening of the second recess 163 of the thermistor accommodating recess 161, the extension plate 182 closes the opening of the communication recess 164, the wire 190 extending from the thermistor element 171 extends to the outside of the second housing 160 via the communication recess 164, and the four locking protrusions 179 of the housing 172 are locked to the four locking holes 166 of the second recess 163, respectively.

[0080] When the thermistor 170 is completely contained in the second housing 160, Fig.10 As shown, the thermistor element 171 is arranged at a position closer to a portion 104b of the conductive plate 104 exposed in the groove of the first recess 162 than the housing 172. The end of one side in the length direction of the thermistor element 171 is adjacent to the portion 104b of the conductive plate 104, and is exposed in the groove at the boundary between the first recess 162 and the second recess 163. That is, the thermistor 170 is accommodated in the second housing 160 in a posture inclined relative to the front-rear direction, so that the thermistor element 171 is close to the conductive plate 104. In other words, the portion 104b of the conductive plate 104 and the end of one side in the length direction of the thermistor element 171 are exposed while being adjacent to each other in the groove of the thermistor accommodation recess 161.

[0081] Next, if Figures 11 to 14 As shown, a thermally conductive sealing material 183 having an appropriate viscosity is applied to the upper and lower surfaces of the second shell 160 and filled in the groove of the thermistor accommodating recess 161 (more specifically, the gap area in the groove that does not include the area occupied by the thermistor 170 and a portion 104b of the conductive plate 104). The thermal conductivity of the material constituting the sealing material 183 is better than the thermal conductivity of the material constituting the second shell 160. The sealing material 183 has sufficient flexibility when filled and solidifies over time. In this example, the sealing material 183 is applied to the upper and lower surfaces of the second shell 160 in the form of a pair of strips extending in the front-to-back direction with intervals in the left-to-right direction (see Fig.11 ). Here, if Fig.14 As shown, the sealing material 183 filled in the groove of the thermistor accommodating recess 161 faces the rear side (the other side in the length direction of the thermistor 170; Fig.14 The movement of the thermistor accommodating recess 161 (left side in FIG) is blocked by a pair of inner walls 177 provided in the housing 172. Therefore, the sealing material 183 filled in the groove of the thermistor accommodating recess 161 is prevented from leaking to the outside of the second housing 160 via the communicating recess 164.

[0082] As described above, by filling the sealing material 183 in the groove of the thermistor accommodating recess 161, as shown in FIG. Fig.13As shown, the sealing material 183 contacts the thermistor element 171 and a portion 104b of the conductive plate 104 exposed in the groove in the thermistor accommodating recess 161. As a result, compared with the case where the thermistor element 171 and a portion 104b of the conductive plate 104 are simply arranged adjacent to each other, it is less likely that there is an air layer that hinders the heat conduction between them. As a result, the thermistor 170 can accurately measure the temperature 104 of the conductive plate (in other words, for example, the temperature of the storage module 102 conducted by the conductive plate 104 in the stacked power storage device 101). In addition, the thermistor element 171 is arranged at a position closer to a portion 104b of the conductive plate 104 than the housing 172. Therefore, the housing 172, which may impair thermal conductivity, is not arranged between the thermistor element 171 and a portion 104b of the conductive plate 104. This can further improve the accuracy of the temperature measured by the thermistor 170. The sealing material 183 has the effect of preventing the thermistor 170 from accidentally coming out of the thermistor accommodating recess 161. Thus, the temperature detection unit 106 is completely assembled to the conductive plate 104 .

[0083] Either the process of assembling the voltage detection unit 105 to the conductive plate 104 or the process of assembling the temperature detection unit 106 to the conductive substrate 104 may be performed first. When both the process of assembling the voltage detection unit 105 to the conductive plate 104 and the process of assembling the temperature detection unit 106 to the conductive substrate 104 are performed, the conductive module 103 is completely assembled.

[0084] The conductive module 103 thus obtained is used for assembling Figure 1 Specifically, the power storage device 101 is obtained by alternately stacking the power storage modules 102 and the conductive modules 103 in the vertical direction, and fixing the stacked body by a predetermined fit or the like.

[0085] like Fig.13As shown, when the storage modules 102 and the conductive modules 103 are alternately stacked in the up-down direction, the sealing material 183 coated on the upper and lower surfaces of the second housing 160 in a stripe shape is pressed on the storage modules 102 adjacent to each other in the up-down direction, thereby continuously pushing the sealing material 183 on substantially the entire upper and lower surfaces of the second housing 160. This improves the sealing (waterproofness) between the storage modules 102 and the conductive modules 103 adjacent to each other in the up-down direction. Similarly, the sealing material 183 filled in the thermistor accommodating recess 161 is also pressed on the storage module 102 adjacent to the upper side, so that the gap area in the thermistor accommodating recess 161 is further filled with a higher density. Therefore, it is less likely that there is an air layer that hinders heat conduction between the thermistor element 171 and a portion 104b of the conductive plate 104. As a result, the thermistor 170 can more accurately measure the temperature 104 of the conductive plate (in other words, for example, the temperature of the electricity storage module 102 conducted through the conductive plate 104 in the stacked electricity storage device 101 ).

[0086] <Operations and Effects>

[0087] As described above, with the conductive module 103 and the power storage device 101 according to the present embodiment, the cover 130 can be locked to the first housing 140 while the voltage detection terminal 110 whose terminal portion 111a is connected to the electric wire 120 is accommodated in the terminal accommodation recess 142 of the first housing 140 and the terminal portion 112a of the voltage detection terminal 110 is exposed. Therefore, when the voltage detection unit 105 is electrically connected to the conductive plate 104 as a detection target (for example, the conductive plate 104 used in the stacked power storage device 101, etc.), for example, after the voltage detection unit 105 is assembled to the conductive plate 104, the exposed terminal portion 112a of the voltage detection terminal 110 can be fixed to the conductive plate 104 using a method such as ultrasonic bonding or welding. Compared with typical bolt fastening, etc., this does not require additional components for connection, and compared with the above-mentioned prior art connection method, it is possible to easily align the two components and reduce the contact resistance at the contact point. In addition, by arranging the cover 130 in the final locking position after the connection between the conductive plate 104 and the voltage detection terminal 110, the end portion 112a of the voltage detection terminal 110 (i.e., the contact point between the conductive plate 104 and the voltage detection terminal 110) can be covered and protected by the cover 130.

[0088] Furthermore, by accommodating the thermistor 170 in the thermistor accommodating recess 161 of the second housing 160, the thermistor element 171 and a portion 104b of the conductive plate 104 are arranged in the groove of the thermistor accommodating recess 161, and the heat conductive sealing material 183 is arranged in the groove in a manner of contacting both the thermistor element 171 and a portion 104b of the conductive plate 104. Thus, compared with a case where the thermistor element 171 and the conductive plate 104 are simply arranged adjacent to each other, it is less likely that there is an air layer that hinders heat conduction between the thermistor element 171 and the conductive plate 104. Thus, the thermistor 170 can accurately measure the temperature 104 of the conductive plate (in other words, for example, the temperature of the storage module 102 conducted through the conductive plate 104 in the stacked storage device 101).

[0089] Therefore, the conductive module 103 and the power storage device 101 according to the present embodiment are excellent in operability of conductively connecting to the conductive plate 104 as a detection target. In addition, the conductive module 103 and the power storage device 101 according to the present embodiment can improve the accuracy of the temperature measured by the thermistor 170.

[0090] In addition, the thermistor 170 is accommodated in the thermistor accommodation recess 161 of the second housing 160 in a posture that the thermistor element 171 is closer to the conductive plate 104 than the housing 172. Therefore, the housing 172 that may impair thermal conductivity is not arranged between the thermistor element 171 and the conductive plate 104. This can further improve the accuracy of the temperature measured by the thermistor 170.

[0091] <Other embodiments>

[0092] The present disclosure is not limited to the above-described embodiments, and various modifications can be adopted within the scope of the present disclosure. For example, the present disclosure is not limited to the above-described embodiments, and modifications, improvements, etc. can be appropriately made. In addition, as long as the present invention can be implemented, the materials, shapes, sizes, quantities, arrangement positions, etc. of the components in the above-described embodiments are freely selected and are not limited.

[0093] Here, the features of the embodiments of the conductive module 103 and the power storage device 101 according to the present disclosure described above are briefly summarized and listed in the following [1] to [3], respectively.

[0094] [1] A conductive module (103), comprising:

[0095] A conductive plate (104);

[0096] a voltage detection terminal (110) having a first portion (112a) configured to be conductively connected to the conductive plate (104);

[0097] A temperature measuring device (170), comprising a temperature measuring element (171) and a housing (172) for holding the temperature measuring element (171);

[0098] A plate-shaped housing (140, 160) assembled to the conductive plate (104), the housing having a terminal accommodating recess (142) for accommodating a voltage detection terminal (110) and a temperature detector accommodating recess (161) for accommodating a temperature detector (170);

[0099] A heat-conductive filler (183) arranged in a groove of the temperature detector accommodating recess (161);

[0100] A cover (130) configured to be locked to a housing (140) at a temporary locking position where a first portion (112a) of a voltage detection terminal (110) accommodated in a terminal accommodation recess (142) is not covered and at a final locking position where the first portion (112a) is covered; and

[0101] An electric wire (120) is conductively connected to the second portion (111a) of the voltage detection terminal (110) and led out to the outside of the housing (140), wherein:

[0102] The housing (160) is constructed so that a portion of the conductive plate (104) is exposed in the groove of the temperature detector accommodating recess (161), and

[0103] The filler (183) is in contact with both the temperature measuring element (171) and a portion of the conductive plate (104).

[0104] According to the conductive module having the structure of [1] above, the cover can be locked to the housing while the voltage detection terminal connected to the electric wire at its second part is accommodated in the terminal accommodating recess of the housing and the first part of the voltage detection terminal is exposed. Therefore, when the voltage detection unit is electrically connected to the conductive plate as the detection target (for example, the conductive plate used in the stacked power storage device, etc.), for example, after the voltage detection unit is assembled to the conductive plate, the exposed first part of the voltage detection terminal can be fixed to the conductive plate using a method such as ultrasonic bonding or welding. Compared with typical bolt fastening, etc., this does not require other components for connection, and compared with the above-mentioned prior art connection method, it is easy to align the two components and reduce the contact resistance at the contact point. Further, by setting the cover at the final locking position after the conductive plate is connected to the voltage detection terminal, the first part of the voltage detection terminal (that is, the contact point between the conductive plate and the voltage detection terminal) can be covered and protected by the cover.

[0105] In addition, the thermometer is accommodated in the thermometer accommodating recess of the housing, so that the temperature measuring element of the thermometer and a portion of the conductive plate exposed in the groove of the thermometer accommodating recess are both arranged in the groove. At the same time, a thermally conductive filler (for example, a sealing material that is flexible when filled and hardens over time) is arranged in the groove to contact both the temperature measuring element and a portion of the conductive plate. As a result, compared with the case where the temperature measuring element and the conductive plate are simply arranged adjacent to each other, it is less likely that there will be an air layer that hinders heat conduction between them. As a result, the thermometer can accurately measure the temperature of the conductive plate (in other words, for example, the temperature of the storage module conducted through the conductive plate in the stacked storage device).

[0106] Therefore, the conductive module of the present configuration is excellent in operability of conductively connecting to a detection target. In addition, the conductive module of the present configuration can improve the accuracy of the temperature measured by the temperature detector.

[0107] [2] The conductive module (103) according to the above [1], wherein:

[0108] The temperature detector (170) is accommodated in a temperature detector accommodation recess (161) of a housing (160) in a posture where a temperature measuring element (171) is closer to the conductive plate (104) than a housing (172).

[0109] According to the conductive module having the structure of [2] above, the housing that impairs thermal conductivity is not arranged between the temperature measuring element and the conductive plate. This can further improve the accuracy of the temperature measured by the temperature measuring device.

[0110] [3] An electric storage device (101), comprising:

[0111] The conductive module (103) according to [1] or [2] above; and

[0112] A power storage module (102) is configured to be capable of charging and discharging, and a conductive module (103) is stacked on the power storage module (102).

[0113] According to the storage device having the structure of [3] above, the cover can be locked to the housing while the voltage detection terminal connected to the electric wire at its second part is accommodated in the terminal accommodating recess of the housing and the first part of the voltage detection terminal is exposed. Therefore, when the voltage detection unit is electrically connected to the conductive plate as the detection target (for example, the conductive plate used in the stacked storage device, etc.), for example, after the voltage detection unit is assembled to the conductive plate, the exposed first part of the voltage detection terminal can be fixed to the conductive plate using a method such as ultrasonic bonding or welding. Compared with typical bolt fastening, etc., this does not require other parts for connection, and compared with the above-mentioned prior art connection method, it is easy to align the two parts and reduce the contact resistance at the contact point. Further, by setting the cover at the final locking position after the conductive plate is connected to the voltage detection terminal, the first part of the voltage detection terminal (that is, the contact point between the conductive plate and the voltage detection terminal) can be covered and protected by the cover.

[0114] In addition, the thermometer is accommodated in the thermometer accommodating recess of the housing, so that the temperature measuring element of the thermometer and a portion of the conductive plate exposed in the groove of the thermometer accommodating recess are both arranged in the groove. At the same time, a thermally conductive filler (for example, a sealing material that is flexible when filled and hardens over time) is arranged in the groove to contact both the temperature measuring element and a portion of the conductive plate. As a result, compared with the case where the temperature measuring element and the conductive plate are simply arranged adjacent to each other, it is less likely that there will be an air layer that hinders heat conduction between them. As a result, the thermometer can accurately measure the temperature of the conductive plate (in other words, for example, the temperature of the storage module conducted through the conductive plate in the stacked storage device).

[0115] Therefore, the power storage device of the present configuration is excellent in operability of conductively connecting to a detection target. In addition, the power storage device of the present configuration can improve the accuracy of the temperature measured by the temperature detector.

Claims

1. A conductive module, comprising: Conductive plate; a voltage detection terminal having a first portion configured to be conductively connected to the conductive plate; A temperature detector, comprising a temperature measuring element and a housing for holding the temperature measuring element; a plate-shaped housing, the housing being assembled to the conductive plate, the housing having a terminal accommodating recess for accommodating the voltage detection terminal and a temperature detector accommodating recess for accommodating the temperature detector; A heat-conductive filler, which is arranged in a groove of the temperature measuring device accommodating recess; a cover configured to be locked to the housing at a temporary locking position in which the first portion of the voltage detection terminal accommodated in the terminal accommodating recess is not covered and at a final locking position in which the first portion is covered; as well as an electric wire conductively connected to the second portion of the voltage detection terminal and led out to the outside of the housing, wherein: The housing is configured so that a portion of the conductive plate is exposed in the groove of the temperature detector accommodating recess, and The filler is in contact with both the temperature measuring element and the portion of the conductive plate.

2. The conductive module according to claim 1, wherein: The temperature detector is accommodated in the temperature detector accommodation recess of the housing in a posture in which the temperature measuring element is closer to the conductive plate than the housing.

3. An electric storage device comprising: The conductive module according to claim 1 or 2; as well as A power storage module is configured to be chargeable and dischargeable, and the conductive module is stacked on the power storage module.

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