WO2021235174A1 - Connection terminal and terminal module containing same - Google Patents

Abstract

In the present invention, a first detection terminal (351) and a second detection terminal (354) are provided to a wiring case. Said detection terminals each have a terminal connection part (360) to which a lead terminal (353b) is connected by solder (353c), and a spring part (361) which is integrally linked to the terminal connection part and generates elastic force for fixing the terminal connection part to the wiring case.

Description

Connection terminal and terminal module including it Cross-reference of related applications

This application is based on Patent Application No. 2020-089082 filed in Japan on May 21, 2020, and the contents of the basic application are incorporated by reference as a whole.

The disclosure described in this specification relates to a connection terminal connected to an electronic device and a terminal module including the connection terminal.

Patent Document 1 shows a battery connection plate. The battery connection plate includes a plate body mounted on a plurality of batteries, a terminal mounted on the plate body, and a terminal for connecting the battery and an electronic component.

Japanese Patent No. 3990960

In the terminal of the battery connection plate shown in Patent Document 1, an insertion hole through which a male screw-shaped electrode provided in the battery is passed and a lead terminal projecting from an electronic component are inserted and soldered. A hole is formed.

In such a configuration, if the terminal vibrates due to, for example, application of an external force, stress may act on the solder connecting the terminal and the lead terminal of the electronic component. The action of such stress may cause an electrical connection failure between the terminal and the lead terminal.

An object of the present disclosure is to provide a connection terminal in which a defect is suppressed in electrical connection with a lead terminal, and a terminal module including the connection terminal.

The connection terminal according to one aspect of the present disclosure is a connection terminal provided in the resin case and to which the lead terminal of the electronic element is connected by a conductive adhesive.
The terminal connection part to which the lead terminal is connected and
It has a spring portion that is integrally connected to the terminal connection portion and generates an elastic force for fixing the terminal connection portion to the resin case.

The terminal module according to one aspect of the present disclosure includes a resin case and
The connection terminal fixed to the resin case and
A terminal module having an electronic element to which a lead terminal is connected to a connection terminal by a conductive adhesive.
The connection terminal is
The terminal connection part to which the lead terminal is connected and
It has a spring portion that is integrally connected to the terminal connection portion and generates an elastic force for fixing the terminal connection portion to the resin case.

According to this, even if the resin case vibrates due to the application of an external force or the like, the vibration of the terminal connection portion is suppressed. The vibration of the terminal connection portion suppresses the action of stress on the conductive adhesive that connects the terminal connection portion and the lead terminal. As a result, it is possible to prevent an electrical connection failure between the terminal connection portion and the lead terminal.

Note that the reference numbers in parentheses above merely indicate the correspondence with the configurations described in the embodiments described later, and do not limit the technical scope at all.

It is a perspective view of a battery pack. It is an exploded perspective view of a battery pack. FIG. 2 is an enlarged perspective view of a region A surrounded by a solid line in FIG. 2. It is a top view of a series bus bar. It is a side view of a series bus bar. It is a top view of the 1st frame part. It is a side view of the 1st frame part. It is a top view of the 2nd frame part. It is a side view of the 2nd frame part. It is a top view of the first detection terminal. It is a side view of the 1st detection terminal. It is a top view of the 2nd detection terminal. It is a side view of the 2nd detection terminal. It is a top view of a fuse. It is a side view of a fuse. It is a partial top view of a wiring passage. 16 is a cross-sectional view taken along the line XVII-XVII shown in FIG. It is a top view which shows the modification of the 1st frame part. It is sectional drawing for demonstrating the fixed state of a detection terminal.

Hereinafter, a plurality of forms for carrying out the present disclosure will be described with reference to the drawings. In each form, the same reference numerals may be given to the parts corresponding to the matters described in the preceding forms, and duplicate explanations may be omitted. When only a part of the configuration is described in each form, other forms described above can be applied to the other parts of the configuration.

It is possible to combine parts that clearly indicate that they can be specifically combined in each embodiment. Further, if there is no particular problem in the combination, it is possible to partially combine the embodiments, the embodiments and the modified examples, and the modified examples with each other, even if it is not clearly stated that the combinations are possible. be.

(First Embodiment)
A battery pack including each of the connection terminal and the terminal module will be described with reference to FIGS. 1 to 17. Note that FIGS. 4 to 17 schematically show various components of the battery pack. The battery pack 100 of the present embodiment is applied to an electric vehicle such as an electric vehicle or a plug-in hybrid vehicle.

In the following, the three directions that are orthogonal to each other are referred to as the x direction, the y direction, and the z direction. In the drawings, the description of "direction" is omitted, and the description is simply x, y, z.

<In-vehicle battery>
FIG. 1 shows the battery pack 100. A plurality of battery packs 100 are mounted on the vehicle. A plurality of battery packs 100 are connected in series or in parallel by a wire harness or the like. This constitutes an in-vehicle power supply. The in-vehicle power supply functions to supply electric power to the electric load of the vehicle. An in-vehicle power supply may be configured by one battery pack 100.

The vehicle duct is connected to the battery pack 100. A fluid for adjusting the temperature of a plurality of battery cells 210 included in the battery pack 100 is supplied to the battery pack 100 from this duct. As a result, an excessive temperature change of the battery cell 210 is suppressed. The temperature of the battery pack 100 may be adjusted by the cooling water circulating in the vehicle.

As the location of the in-vehicle power supply, for example, the space under the front seat of the vehicle, the space under the rear seat, and the space between the rear seat and the trunk room can be appropriately adopted.

As shown in FIG. 2, the battery pack 100 has a battery module 200, a bus module 300, and a cover 400. The battery module 200 has a plurality of battery cells 210 and a battery case 220. The bus bar module 300 has a bus bar case 310, a bus bar 330, a sensor 350, a wiring case 370, and a monitoring board 390.

The plurality of battery cells 210 are housed in the battery case 220. The opening side of the battery case 220 of the plurality of battery cells 210 is covered by the bus module 300. The bus module 300 is covered by the cover 400. The bus module 300 includes a terminal module.

<Battery cell>
Each of the plurality of battery cells 210 is a secondary battery. Examples of the secondary battery that can be adopted in the battery cell 210 include a lithium ion secondary battery, a nickel hydrogen secondary battery, and an organic radical battery. These secondary batteries generate an electromotive voltage by a chemical reaction.

The battery cell 210 has a power generation element and a metal case for accommodating the power generation element. The metal case has a flat plate shape with a thin thickness in the y direction. The metal case has a first end face 210a and a second end face 210b arranged in the z direction. Further, the metal case has a first main surface and a second main surface arranged in the y direction, and a first side surface and a second side surface arranged in the x direction. Of the six surfaces provided by these metal cases, the first main surface and the second main surface have a larger area than the other four surfaces.

A negative electrode terminal 211 and a positive electrode terminal 212 are formed on the first end surface 210a of the metal case. The negative electrode terminal 211 and the positive electrode terminal 212 are arranged so as to be separated from each other in the x direction. The negative electrode terminal 211 is located on the first side surface side. The positive electrode terminal 212 is located on the second side surface side.

<Battery case>
The battery case 220 has a bottom wall 221 and a side wall 222. The bottom wall 221 and the side wall 222 are integrally connected. The bottom wall 221 and the side wall 222 are each made of an insulating resin material.

The bottom wall 221 has a flat shape with a thin thickness in the z direction. The bottom wall 221 has an inner bottom surface 221a arranged apart from each other in the z direction and an outer bottom surface on the back side thereof.

The side wall 222 stands up from the inner bottom surface 221a in the z direction. The side wall 222 extends along the edge of the inner bottom surface 221a and forms an annular shape in the circumferential direction around the z direction.

To explain in detail, the side wall 222 has a left side wall 223 and a right side wall 224 arranged apart from each other in the y direction, and a front side wall 225 and a rear side wall 226 arranged apart from each other in the x direction. The left side wall 223, the front side wall 225, the right side wall 224, and the rear side wall 226 are connected in this order in the circumferential direction around the z direction. As a result, the side wall 222 forms an annular shape in the circumferential direction around the z direction. The side wall 222 and the bottom wall 221 form a storage space for the battery case 220.

<Septum>
The battery case 220 has a plurality of partition walls 227 for dividing the storage space into a plurality of individual storage spaces. A plurality of partition walls 227 are arranged side by side in the y direction on the bottom wall 221 side of the storage space. As a result, the bottom wall 221 side of the storage space is divided into a plurality of individual storage spaces arranged in the y direction.

On each wall of the battery case 220 constituting the individual storage space, a plurality of minute protrusions protruding toward the center side of the individual storage space are formed. The second end surface 210b side of the battery cell 210 is press-fitted into each of the plurality of individual storage spaces so that the minute protrusions are deformed. As a result, the second end surface 210b side of each of the plurality of battery cells 210 is fixed to the battery case 220. A plurality of battery cells 210 are provided between the left side wall 223 and the right side wall 224. A slit may be formed in the partition wall 227 to communicate the two individual storage spaces arranged adjacent to each other.

Arbitrary two battery cells 210 arranged adjacent to each other in the y direction are arranged so as to face each other on the first main surface or the second main surface. Due to this facing arrangement, one of the negative electrode terminals 211 and the other positive electrode terminal 212 of the two battery cells 210 adjacent to each other in the y direction are arranged in the y direction.

The negative electrode terminals 211 and the positive electrode terminals 212 arranged in the y direction are connected in series by a series bus bar 331 described later. As a result, the plurality of battery cells 210 are electrically connected in series. A plurality of battery cells 210 are arranged in the order of potential in the y direction. The battery cell 210 having the lowest potential is located on one side of both ends of the plurality of battery cells 210 arranged in the y direction. The highest potential battery cell 210 is located on the other side of both ends. The lowest potential battery cell 210 is located on the left side wall 223 side. The highest potential battery cell 210 is located on the right side wall 224 side.

<Output terminal>
A negative electrode output terminal 232 for electrically connecting the battery cell 210 having the lowest potential and the wire harness is integrally connected to the left side wall 223. A positive electrode output terminal 233 for electrically connecting the battery cell 210 having the highest potential and the wire harness is integrally connected to the right side wall 224. The negative electrode output terminal 232 and the positive electrode output terminal 233 have a terminal block 234 extending from the side wall 222 so as to be separated from the storage space of the battery case 220, and an external connection terminal 235 fixed to the terminal block 234.

The terminal block 234 is made of the same insulating material as the side wall 222. The external connection terminal 235 is a bolt made of a conductive material such as metal. The head of the external connection terminal 235 is embedded in the terminal block 234. The shaft portion of the external connection terminal 235 is exposed from the upper surface of the terminal block 234. This shaft portion extends in the z direction so as to be separated from the bottom wall 221. As will be described later, the terminal of the wire harness and the negative electrode bus bar 333 are fixed to the shaft portion of the external connection terminal 235 provided in the negative electrode output terminal 232. The terminal of the wire harness and the positive electrode bus bar 334 are fixed to the shaft portion of the external connection terminal 235 provided in the positive electrode output terminal 233.

<Busba case>
The bus bar case 310 is made of an insulating resin material. The bus bar case 310 is provided on the tip surface of the side wall 222 that divides the opening of the storage space. The bus bar case 310 is bolted to the battery case 220.

The bus bath case 310 is formed with a plurality of opening windows for projecting the tip ends of the negative electrode terminal 211 and the positive electrode terminal 212 of each battery cell 210. The plurality of open windows are arranged so as to be separated from each other in the y direction and the x direction.

<Busba>
As shown in FIGS. 2 and 3, the bus bar 330 has a series bus bar 331, a negative electrode bus bar 333, and a positive electrode bus bar 334. Each of these three types of bass is made of conductive copper, aluminum, or the like.

As shown in FIGS. 4 and 5, the series bus bar 331 has two terminal conductive portions 335 and one connecting conductive portion 336. The two terminal conductive portions 335 are arranged so as to be separated from each other in the y direction. These two terminal conductive portions 335 are connected via the connecting conductive portion 336.

The terminal conductive portion 335 has a thin flat plate shape in the z direction. The thickness of the terminal conductive portion 335 is determined so that during laser welding of the terminal conductive portion 335 and the electrode terminal of the battery cell 210, it is possible to avoid raising the temperature to such an extent that the performance of the battery cell 210 is changed by the laser. There is.

The connecting conductive part 336 integrally connects the two terminal conductive parts 335. The connecting conductive portion 336 extends from one of the two terminal conductive portions 335 in a z-direction manner, then folds back and extends in the z-direction toward the other of the two terminal conductive portions 335. Due to such a configuration, the connecting conductive portion 336 has a property of being easily deformed in the y direction in which the two terminal conductive portions 335 are lined up.

The two terminal conductive portions 335 are laser welded to the negative electrode terminal 211 and the positive electrode terminal 212 having different positions in the y direction. By this laser welding, two battery cells 210 arranged next to each other in the y direction are electrically connected in series.

A conductive extension portion 337 is connected to one of the two terminal conductive portions 335. The conductive extension portion 337 extends in the x direction from the terminal conductive portion 335. A voltage detection hole 337a for electrically connecting to the voltage sensor 350b, which will be described later, is formed in the conductive extension portion 337. The voltage detection hole 337a penetrates the conductive extension portion 337 in the z direction.

<Negative electrode bus bar and positive electrode bus bar>
As shown in FIG. 2, the negative electrode bus bar 333 has one terminal conductive portion 335 and an output conductive portion 338. Although not specified in the drawings, the positive electrode bus bar 334 also has one terminal conductive section 335 and an output conductive section 338 in the same manner as the negative electrode bus bar 333. The terminal conductive portion 335 and the output conductive portion 338 are integrally connected. Further, the above-mentioned conductive extension portion 337 is integrally connected to the terminal conductive portion 335 of these two types of bus bars.

The terminal conductive portion 335 of the negative electrode bus bar 333 is laser welded to the negative electrode terminal 211 of the battery cell 210 having the lowest potential. The output conductive portion 338 is arranged to face the terminal block 234 of the negative electrode output terminal 232 in the z direction.

The positive electrode terminal 212 of the battery cell 210 having the maximum potential of the terminal conductive portion 335 of the positive electrode bus bar 334 is laser welded. The output conductive portion 338 is arranged to face the terminal block 234 of the positive electrode output terminal 233 in the z direction.

An output hole 338a penetrating in the z direction is formed in each of the output conductive portions 338 of the negative electrode bus bar 333 and the positive electrode bus bar 334. The shaft portion of the external connection terminal 235 is passed through the output hole 338a.

Further, the terminal of the wire harness is passed through the shaft portion of this external connection terminal 235. Then, a nut is fastened to the shaft portion of the external connection terminal 235. As a result, the output conductive portion 338 and the terminal of the wire harness are sandwiched between the terminal block 234 and the nut. The output conductive portion 338 and the terminal of the wire harness come into contact with each other, and both are electrically connected.

<Power converter>
The wire harness that is electrically connected to the output conductive portion 338 is electrically connected to the power conversion device. The DC power of the battery pack 100 is supplied to this power conversion device.

The power conversion device converts the supplied DC power into AC power. This AC power is supplied to the motor as a power source for traveling the electric vehicle. This causes the motor to run. On the contrary, the AC power generated by the power generation by the motor is converted into DC power by the power conversion device. This DC power is supplied to the battery pack 100. As a result, the battery pack 100 is charged. The power conversion device may have a converter function for converting the voltage level of the input power.

<Sensor>
The sensor 350 detects the physical quantity of the battery cell 210. As shown in FIGS. 2 and 3, the sensor 350 includes a temperature sensor 350a and a voltage sensor 350b. The temperature sensor 350a detects the temperature of a representative battery cell 210 to be detected among the plurality of battery cells 210. The voltage sensor 350b detects the output voltage of each of the plurality of battery cells 210 connected in series.

<Temperature sensor>
The temperature sensor 350a has a thermistor and a temperature detection wiring that electrically connects the thermistor and the monitoring board 390. The thermistor is contact-arranged on the first end surface 210a of the representative battery cell 210. A temperature detection wiring extends from this thermistor toward the wiring connector 372 described later.

<Voltage sensor>
The voltage sensor 350b has a first detection terminal 351 and a detection screw 352, a fuse 353, a second detection terminal 354, and a voltage detection wiring 355. The first detection terminal 351 is connected to the conductive extension portion 337 by the detection screw 352. Further, the first detection terminal 351 is connected to the second detection terminal 354 via a fuse 353. A voltage detection wiring 355 is connected to the second detection terminal 354. The voltage detection wiring 355 extends from the second detection terminal 354 toward the wiring connector 372. The voltage sensor 350b will be described in detail later. The fuse 353 corresponds to an electronic element.

<Wiring case>
The wiring case 370 is made of an insulating resin material. The wiring case 370 has a frame shape that opens in the z direction. The wiring case 370 is fixed to the bus bar case 310 by a snap fit or the like. The wiring case 370 corresponds to the resin case.

As shown in FIGS. 1 and 2, the wiring case 370 has two wiring storage portions 371 extending in the y direction and a wiring connector 372 provided with wiring for the sensor 350. Further, the wiring case 370 has two support portions extending in the x direction and an auxiliary storage portion.

Two wiring storage portions 371 extending in the y direction are connected via two support portions extending in the x direction. As a result, the wiring case 370 has a frame shape. The wiring connector 372 is provided on one of the two support portions. The auxiliary compartment extends from the other of the two supports towards the wiring connector 372.

The voltage detection wiring 355 is stored inside the wiring storage unit 371. The temperature detection wiring is stored inside the auxiliary storage unit. The tips of the voltage detection wiring 355 and the temperature detection wiring that have passed through the inside (wiring passage) of these storage portions are provided in the wiring connector 372.

<Wiring storage>
The wiring storage portion 371 has a base portion 373 extending in the y direction and a lid portion 374. By combining these, a wiring passage is formed between the two. A part of the wiring passage is enlarged and shown in FIG.

As shown in FIG. 3, with the wiring case 370 fixed to the bus bar case 310, the base portion 373 is formed with a first frame portion 375 aligned with the series bus bar 331 in the x direction. The first frame portion 375 extends in an annular shape around the z direction and opens in the z direction.

The conductive extension portion 337 and the first detection terminal 351 are connected by a detection screw 352 on the base portion 373 on both sides of the first frame portion 375 on both sides in the y direction. The first detection terminal 351 and the second detection terminal 354 are connected to each other via a fuse 353 in the hollow of the first frame portion 375. The second detection terminal 354 and the voltage detection wiring 355 are connected on the base portion 373 on the other side of the first frame portion 375 on both sides in the y direction.

The wiring case 370 has a second frame portion 376 that is nested in the hollow of the first frame portion 375. The second frame portion 376 is inserted into the hollow of the first frame portion 375 with the first detection terminal 351 and the second detection terminal 354 and the fuse 353 provided in the hollow. The second frame portion 376 is fixed to the first frame portion 375.

A fuse 353 is provided in the hollow of the second frame portion 376 in a state where the second frame portion 376 is fixed to the first frame portion 375. The first detection terminal 351 and the second detection terminal 354 each come into contact with the second frame portion 376 while facing each other in the z direction. By this contact, the positions of the first detection terminal 351 and the second detection terminal 354 in the z direction are defined.

<Monitoring board>
As shown in FIG. 2, the monitoring board 390 has a circuit board 391, a first connector 392, and a second connector 393. The circuit board 391 has a printed circuit board, a high voltage circuit section, a low voltage circuit section, and an isolated circuit section. The first connector 392, the second connector 393, the high voltage circuit section, the low voltage circuit section, and the insulation circuit section are each mounted on the printed circuit board.

The wiring connector 372 is electrically connected to the first connector 392 via a wire harness. An external battery ECU is electrically connected to the second connector 393 via a wire harness.

The high voltage circuit unit is electrically connected to the first connector 392. The low voltage circuit section is electrically connected to the second connector 393. The isolated circuit section functions to transmit and receive signals to and from each other while electrically insulating the high voltage circuit section and the low voltage circuit section.

The high voltage circuit section has a monitoring IC chip. The monitoring IC chip converts the analog signal as a detection result input from the sensor 350 into a digital signal. The isolated circuit section outputs the digital signal input from the high voltage circuit section to the low voltage circuit section. The low voltage circuit section has a microcomputer for communication. By communicating with the battery ECU, the microcomputer outputs a digital signal as a detection result input from the insulation circuit unit to the battery ECU.

The battery ECU determines the equalization of the SOCs of each of the plurality of battery cells 210 based on the input voltage and temperature detection results. Then, the battery ECU outputs an instruction for equalization processing based on the judgment to the monitoring board 390. This instruction signal is input to the monitoring IC chip of the high voltage circuit section via the low voltage circuit section and the insulation circuit section.

The monitoring IC chip includes a switch for selectively charging and discharging the battery cell 210 by connecting at least two negative electrode terminals 211 of the plurality of battery cells 210 and the positive electrode terminals 212 to each other. .. The monitoring IC chip controls the opening and closing of the switch according to the instruction input from the battery ECU. As a result, the plurality of battery cells 210 are electrically connected. Of the plurality of electrically connected battery cells 210, the battery cell 210 having a relatively high SOC is discharged, and the battery cell 210 having a relatively low SOC is charged. As a result, the SOCs of the plurality of battery cells 210 are equalized. SOC is an abbreviation for state of charge.

<Cover>
As shown in FIGS. 1 and 2, the cover 400 has a top plate 410 and an edge wall 420. The top plate 410 and the edge wall 420 are integrally connected. The top plate 410 and the edge wall 420 are each manufactured of an insulating resin material.

The top plate 410 has a flat shape with a thin thickness in the z direction. The top plate 410 has an inner top surface 410b which is arranged apart from each other in the z direction and an outer top surface 410b on the back side thereof.

The edge wall 420 stands up in the z direction from the inner surface. The edge wall 420 extends along the edge of the inner top surface and forms an annular shape in the circumferential direction around the z direction. With the cover 400 assembled and fixed to the bus bar case 310, the bus bar 330 is provided in the upper space between the cover 400 and the bus bar case 310.

The cover 400 has a shorter length in the x direction than the battery case 220. Therefore, as shown in FIG. 1, with the cover 400 assembled to the bus bar case 310, the two wiring storage portions 371 provided in the wiring case 370 are located outside the cover 400. The cover 400 is located between the two wiring compartments 371 in the x direction.

<Wiring passage and voltage sensor>
Next, the wiring passage of the wiring case 370 and the voltage sensor 350b provided therein will be described in detail.

<1st frame part>
As described above, the first frame portion 375 is integrally connected to the base portion 373 of the wiring case 370 that constitutes a part of the wiring passage. As shown in FIGS. 6 and 7, the first frame portion 375 has the first wall portion 377 and the second wall portion 378 arranged apart from each other in the y direction, and the third wall portion 379 and the third wall portion 379 arranged apart from each other in the x direction. It has 4 wall portions 380.

The first wall portion 377, the third wall portion 379, the second wall portion 378, and the fourth wall portion 380 are connected in this order in the circumferential direction around the z direction. The hollow of the first frame portion 375 is partitioned by the first inner surface 375a of these four wall portions. These four wall portions have a first upper surface 375c and a first lower surface 375d arranged apart from each other in the z direction. An opening formed on the first upper surface 375c side of these four wall portions communicates with the external space. The opening formed on the first lower surface 375d side of these four wall portions is closed by the base portion 373. In FIGS. 6 and 7, in addition to the first frame portion 375, a portion of the base portion 373 that closes the opening on the first lower surface 375d side of the first frame portion 375 is shown.

As shown in FIG. 6, a plurality of through holes 373c opened in the mounting surface 373a and its back surface 373b are formed in a portion of the base portion 373 that closes the opening on the first lower surface 375d side of the first frame portion 375. ing. The tip side of each of the lead terminal 353b and the specified portion 376h, which will be described later, is passed through these plurality of through holes 373c.

Each of the first wall portion 377 and the second wall portion 378 is formed with a first slit 375e notched from the first upper surface portion 375c toward the first lower surface portion 375d. The first slit 375e of the present embodiment cuts out a part of each of the first wall portion 377 and the second wall portion 378 so as to divide each of the first wall portion 377 and the second wall portion 378 into two. There is.

As mentioned above, the base portion 373 extends in the y direction. Therefore, the first wall portion 377 extending in the x direction of the first frame portion 375 and the second wall portion 378 intersect with each other in the extension direction of the base portion 373.

The first slit 375e formed in the first wall portion 377 has a hollow of the first frame portion 375 and a space on one side of the base portion 373 on both sides of the first frame portion 375 in the y direction in the y direction. Communicate. The first slit 375e formed in the second wall portion 378 communicates the hollow of the first frame portion 375 with the space on the base portion 373 on the other side of the first frame portion 375 on both sides in the y direction in the y direction. doing.

As shown in FIGS. 16 and 17, each of the hollow first wall portion 377 side of the first frame portion 375, the first slit 375e of the first wall portion 377, and the space on the base portion 373 communicating with the first slit portion 375e. A first detection terminal 351 is provided. A second detection terminal 354 is provided in each of the hollow second wall portion 378 side of the first frame portion 375, the first slit 375e of the second wall portion 378, and the space on the base portion 373 communicating with the first slit 375e.

Each of the third wall portion 379 and the fourth wall portion 380 is formed with a fitting hole 375f that opens into the first inner surface 375a and the first outer surface 375b on the back side thereof. In the present embodiment, one fitting hole 375f is formed in each of the third wall portion 379 and the fourth wall portion 380. The fitting holes 375f formed in each wall portion are arranged so as to be separated in the x direction. A protrusion 376f, which will be described later, is inserted into the fitting hole 375f.

<Second frame>
As shown in FIGS. 8 and 9, the second frame portion 376 has the fifth wall portion 381 and the sixth wall portion 382 arranged apart from each other in the y direction, and the seventh wall portion 383 and the seventh wall portion 383 arranged apart from each other in the x direction. It has 8 wall portions 384. The fifth wall portion 381, the seventh wall portion 383, the sixth wall portion 382, and the eighth wall portion 384 are connected in this order in the circumferential direction around the z direction. The hollow of the second frame portion 376 is partitioned by the second inner surface 376a of these four wall portions. These four wall portions have a second upper surface 376c and a second lower surface 376d arranged apart from each other in the z direction. An opening formed by each of the second upper surface 376c side and the second lower surface 376d side of these four wall portions communicates with the external space.

As shown in FIGS. 16 and 17, the second frame portion 376 is housed in the hollow of the first frame portion 375. Therefore, the length of the second frame portion 376 in the y direction is shorter than the length of the hollow first frame portion 375 in the y direction. The length of the second frame portion 376 in the x direction is shorter than the length of the hollow of the first frame portion 375 in the x direction.

The length of the second frame portion 376 in the y direction is the length between the second outer surface 376b on the back side of the second inner surface 376a of each of the fifth wall portion 381 and the sixth wall portion 382. The hollow length of the first frame portion 375 in the y direction is the length between the first inner surface 375a of each of the first wall portion 377 and the second wall portion 378.

The length of the second frame portion 376 in the x direction is the length between the second outer surface 376b of each of the seventh wall portion 383 and the eighth wall portion 384. The hollow x-direction length of the first frame portion 375 is the length between the first inner surface 375a of each of the third wall portion 379 and the fourth wall portion 380.

A protrusion 376f protruding in the x direction is formed on the second outer surface 376b of each of the 7th wall portion 383 and the 8th wall portion 384. In the present embodiment, one protrusion 376f is formed on each of the seventh wall portion 383 and the eighth wall portion 384. The extension directions of the protrusions 376f formed on each wall are opposite to each other in the x direction. The sum of the lengths of the protrusions 376f and the second frame portion 376 in the x-direction is longer than the hollow length of the first frame portion 375 in the x-direction.

The length between the second upper surface 376c and the second lower surface 376d of the four wall portions provided by the second frame portion 376 is the first upper surface 375c and the first lower surface 375d of the four wall portions provided by the first frame portion 375. It is shorter than the length between.

Two second slits 376e notched from the second upper surface 376c toward the second lower surface 376d are formed on each of the seventh wall portion 383 and the eighth wall portion 384. A protrusion 376f is formed between the formation regions of the two second slits 376e in each wall portion. With this configuration, the formed portion of the protrusion 376f of each wall portion tends to bend in the x direction.

In the process of inserting the second frame portion 376 into the hollow of the first frame portion 375, the tip end side of the protrusion 376f comes into contact with the first inner surface 375a of each of the third wall portion 379 and the fourth wall portion 380. By this contact, the forming portions of the protrusions 376f of the seventh wall portion 383 and the eighth wall portion 384 are elastically deformed in such a manner that the separation distance in the x direction from each other is shortened. When the protrusion 376f reaches the fitting hole 375f of each of the third wall portion 379 and the fourth wall portion 380, the seventh wall portion 383 and the eighth wall portion 384 are each restored to their original shapes, and the protrusion 376f is fitted with the fitting hole. It is fitted in 375f. As a result, the second frame portion 376 is fixed to the first frame portion 375.

As shown in FIG. 17, in a state where the second frame portion 376 is fixed to the first frame portion 375, the second upper surface portion 376c of the second frame portion 376 and the first upper surface portion 375c of the first frame portion 375 are respectively in the z direction. The height position of is the same. The length of the second frame portion 376 is shorter in the z direction than that of the first frame portion 375. Therefore, the second lower surface 376d of the second frame portion 376 is located in the hollow of the first frame portion 375. A gap is formed between the second lower surface 376d of the second frame portion 376 and the first lower surface 375d of the first frame portion 375. A gap is formed between the second lower surface 376d of the second frame portion 376 and the mounting surface 373a of the base portion 373. A part of each of the first detection terminal 351 and the second detection terminal 354 is provided in this gap.

A support base 376 g is connected to the second inner surface 376a of the sixth wall portion 382. A pillar-shaped defining portion 376h extending in the z direction is connected to the support base 376g. The regulation portion 376h extends from the support base 376g toward the second lower surface 376d side in the z direction. The tip of the support base 376 g projects out of the hollow of the second frame portion 376. With the second frame portion 376 fixed to the first frame portion 375, the tip of the support base 376g projects out of the hollow of the first frame portion 375 through the through hole 373c.

The extension frame portion 376i is connected to the second outer surface 376b of the sixth wall portion 382. The extension frame portion 376i has a frame shape that opens in the z direction together with the second frame portion 376. The extension frame portion 376i has an upper surface and a lower surface arranged apart from each other in the z direction. The lower surface extends in a plane orthogonal to the z direction. On the other hand, the upper surface is curved so as to be convex toward the lower surface in the z direction.

The thickness in the z direction between the upper surface and the lower surface of the extension frame portion 376i becomes thinner as it is separated from the sixth wall portion 382 in the y direction. As a result, the portion of the extension frame portion 376i separated from the sixth wall portion 382 is likely to bend in the z direction.

As shown in FIG. 17, the portion of the extension frame portion 376i that easily bends in the z direction comes into contact with the portion of the voltage detection wiring 355 connected to the second detection terminal 354. By this contact, the second detection terminal 354 side of the voltage detection wiring 355 is pressed against the base portion 373. The second detection terminal 354 side of the voltage detection wiring 355 is sandwiched between the extension frame portion 376i and the base portion 373.

<Detection terminal>
As shown in FIGS. 10 to 13, the first detection terminal 351 and the second detection terminal 354 have a thin shape. These detection terminals are made by pressing a thin metal plate. These detection terminals have a terminal connection portion 360 and a spring portion 361 as common components.

<Terminal connection>
The terminal connection portion 360 has a thin flat plate shape in the z direction. The terminal connection portion 360 has an upper surface 360a and a lower surface 360b arranged apart from each other in the z direction. The terminal connection portion 360 is formed with a connection hole 360c that opens in the upper surface 360a and the lower surface 360b.

As shown in FIGS. 16 and 17, terminal connection portions 360 for each of the first detection terminal 351 and the second detection terminal 354 are provided in the hollow of the first frame portion 375. Then, the lead terminal 353b of the fuse 353 is inserted into the connection hole 360c of the terminal connection portion 360 of each of these two detection terminals. The tip of the lead terminal 353b projects out of the hollow of the first frame portion 375 through the through hole 373c. The terminal connection portion 360 in which the connection hole 360c is formed and the lead terminal 353b are connected by the solder 353c. As a result, the terminal connection portions 360 of the two detection terminals are electrically and mechanically connected to each other via the fuse 353 and the solder 353c. The solder 353c corresponds to the conductive adhesive.

<Spring part>
The spring portion 361 is cantilevered by the terminal connection portion 360 and has a shape that easily bends in the z direction. One end of the spring portion 361 is integrally connected to the terminal connection portion 360. The spring portion 361 extends in the z direction from the lower surface 360b of the terminal connecting portion 360 toward the upper surface 360a and also extends in the y direction. The other end of the spring portion 361 is not opposed to and separated from the upper surface 360a of the terminal connecting portion 360 in the z direction. When a force along the z direction acts on the other end of the spring portion 361, the spring portion 361 tends to bend in the z direction with one end connected to the terminal connecting portion 360 as a fulcrum.

The spring portion 361 is provided in the hollow of the first frame portion 375 together with the terminal connection portion 360. A second frame portion 376 is also provided in the hollow of the first frame portion 375. When the second frame portion 376 is inserted into the hollow of the first frame portion 375, the other ends of the spring portions 361 of the first detection terminal 351 and the second detection terminal 354 are attached to the second lower surface 376d of the second frame portion 376. Contact. The second frame portion 376 corresponds to the pressing portion.

Due to this contact, the spring portion 361 elastically deforms from the upper surface 360a to the lower surface 360b in the z direction. As a result, an elastic force acting on the second frame portion 376 from the spring portion 361 is generated in the spring portion 361. The reaction force of this elastic force acts from the second frame portion 376 to the spring portion 361. By this reaction force, one end side connected to the terminal connection portion 360 of the spring portion 361 is pressed against the base portion 373.

When the second frame portion 376 is fixed to the first frame portion 375 by fitting the protrusion portion 376f into the fitting hole 375f, the magnitude of the elastic force generated in the spring portion 361 is determined. The spring portion 361 is provided in the hollow of the first frame portion 375 in a state of being contracted in the z direction.

The elastic force generated by the spring portion 361 is applied to the second frame portion 376, and the terminal connection portion 360 is pressed against the base portion 373 by the reaction force of the elastic force. As a result, the terminal connection portions 360 of the first detection terminal 351 and the second detection terminal 354 are fixed to the wiring case 370.

In this embodiment, two spring portions 361 are integrally connected to the terminal connection portion 360. One end side of these two spring portions 361 is arranged so as to be separated from each other in the x direction. Therefore, the contact points of the other ends of these two spring portions 361 with the second frame portion 376 are also arranged apart from each other in the x direction.

<1st relay part and bolt connection part>
As shown in FIGS. 10 and 11, the first detection terminal 351 has a first relay portion 362 and a bolt connection portion 363 in addition to the terminal connection portion 360 and the spring portion 361.

The first relay portion 362 has a longitudinal portion 362a and a short portion 362b that are integrally connected to each other. The longitudinal portion 362a is connected to the terminal connecting portion 360. The short end portion 362b is connected to the bolt connection portion 363. The length of the longitudinal portion 362a is longer in the x direction than that of the terminal connection portion 360. The short portion 362b has a shorter length in the x direction than the terminal connection portion 360.

The bolt connection portion 363 has a longer length in each of the x direction and the y direction than the terminal connection portion 360. The bolt connection portion 363 has a rectangular shape in a plane orthogonal to the z direction.

A bolt hole 363c penetrating in the z direction is formed in the bolt connection portion 363. As shown in FIGS. 16 and 17, the bolt connection portion 363 is laminated with the conductive extension portion 337 in the z direction. As a result, the bolt hole 363c and the voltage detection hole 337a communicate with each other in the z direction. The bolt connection portion 363 corresponds to the fixing portion. The bolt hole 363c corresponds to the fixing hole.

In the present embodiment, an arrangement hole 373d that opens in the z direction is formed in the base portion 373. A conductive extension portion 337 is provided in the arrangement hole 373d.

The detection screw 352 has a shaft portion in which a thread groove is formed and a head portion connected to an end portion of the shaft portion. The tip end side of the shaft portion of the detection screw 352 is inserted into the voltage detection hole 337a from the bolt hole 363c. A nut 352a is fastened to the tip end side of the shaft portion of the detection screw 352. A bolt connection portion 363 and a conductive extension portion 337 are sandwiched between the head of the detection screw 352 and the nut 352a. As a result, the bolt connection portion 363 and the conductive extension portion 337 come into contact with each other, and both are electrically connected. At the same time, the bolt connection portion 363 is pressed against the base portion 373 by this fastening. As a result, the bolt connection portion 363 and the conductive extension portion 337 are fixed to the base portion 373, respectively. The terminal connection portion 360 connected to the bolt connection portion 363 via the first relay portion 362 is fixed to the base portion 373.

In this embodiment, an example is shown in which the conductive extension portion 337 is provided in the arrangement hole 373d formed in the base portion 373. However, instead of the conductive extension portion 337 being provided in the arrangement hole 373d, a configuration in which the nut 352a is provided in the arrangement hole 373d can also be adopted. Further, of course, a washer may be passed through the shaft portion of the detection screw 352 in order to stabilize the fixed state of each of the bolt connection portion 363 and the conductive extension portion 337 with respect to the base portion 373.

As described above, the short portion 362b having a short length in the x direction is connected to the bolt connection portion 363. Therefore, even if the bolt connection portion 363 is twisted by fastening the nut 352a to the shaft portion of the detection screw 352 described above, the twist is suppressed from being transmitted to the longitudinal portion 362a.

Further, the length of the longitudinal portion 362a is long in the x direction. Therefore, even if the longitudinal portion 362a is twisted by fastening the nut 352a to the shaft portion of the detection screw 352, the arrangement position of the first detection terminal 351 with respect to the base portion 373 due to the contact of the longitudinal portion 362a with the base portion 373. Is suppressed from fluctuating. The action of stress on the solder 353c connecting the first detection terminal 351 and the fuse 353 is suppressed. It is possible to suppress the occurrence of electrical connection failure between the first detection terminal 351 and the lead terminal 353b.

The connection point of the terminal connection portion 360 at one end of the two spring portions 361 described above is indicated by a cross in FIG. These two connecting points are pressed against the base portion 373 by the elastic force of the spring portion 361. In FIG. 17, a line passing through these connecting points and along the z direction is shown as a alternate long and short dash line.

In the first detection terminal 351, the bolt hole 363c of the bolt connection portion 363 is a fixing point with the base portion 373. The connection hole 360c of the terminal connection portion 360 is located in the triangle connecting the bolt hole 363c and one end of the two spring portions 361.

<Second relay section and caulking section>
As shown in FIGS. 12 and 13, the second detection terminal 354 has a second relay portion 364 and a caulking portion 365 in addition to the terminal connection portion 360 and the spring portion 361.

The second relay unit 364 integrally connects the terminal connection unit 360 and the caulking unit 365. A defined hole 364a penetrating in the z direction is formed in the second relay portion 364. The regulation portion 376h of the second frame portion 376 is inserted into the regulation hole 364a. This defines the position of the second relay unit 364 in the direction orthogonal to the z direction.

The terminal connection portion is in a triangle connecting the fixing hole 364a of the regulation portion 376h of the second relay portion 364 and the connection point of the terminal connection portion 360 at one end of the two spring portions 361 indicated by x in FIG. The connection hole 360c of 360 is located.

The caulking portion 365 has a tubular shape extending in the y direction. The second relay portion 364 is integrally connected to one end of the caulking portion 365. The voltage detection wiring 355 is inserted into the opening of the caulking portion 365 on the other end side.

The voltage detection wiring 355 is an insulated wire in which the conducting wire 366 is covered with an insulating coating 367. On the end side of the voltage detection wiring 355, the end of the lead wire 366 is exposed from the insulating coating 367. Each of the exposed portion of the conducting wire 366 from the insulating coating 367 and the end side of the insulating coating 367 located near the exposed portion are provided in the hollow of the caulked portion 365.

By heat caulking, the caulked portion 365 forming a tubular shape is deformed so that its own hollow is shrunk. Due to this deformation, the end sides of the conducting wire 366 and the insulating coating 367 are fixed to the caulked portion 365. The caulked portion 365 is in direct contact with the conducting wire 366. As a result, the voltage detection wiring 355 and the second detection terminal 354 are electrically and mechanically connected.

As described above, the extension frame portion 376i is connected to the second outer surface 376b of the sixth wall portion 382. The portion of the extension frame portion 376i that easily bends in the z direction is in contact with the fixed end side of the caulking portion 365 of the voltage detection wiring 355. By this contact, the voltage detection wiring 355 is pressed against the base portion 373. The terminal connection portion 360 is fixed to the base portion 373 together with the second relay portion 364 to which the voltage detection wiring 355 is connected.

The connection hole 360c of the terminal connection portion 360 is in the triangle connecting the pressing point pressed against the base portion 373 of the voltage detection wiring 355 and the connection point of the terminal connection portion 360 at one end of the two spring portions 361 indicated by x. Is located.

<Fuse>
As shown in FIGS. 14 and 15, the fuse 353 connecting the two terminal connecting portions 360 to each other has one main body portion 353a and two lead terminals 353b. The main body portion 353a has a pillar shape extending in the y direction. The two lead terminals 353b extend from each of the two end faces of the main body portion 353a.

The lead terminal 353b extends in the y direction from the end surface of the main body portion 353a and then extends in the z direction. As shown in FIG. 17, the tip of the lead terminal 353b is inserted from the opening on the upper surface 360a side of the connection hole 360c toward the inside thereof. The tip of the lead terminal 353b protrudes out of the connection hole 360c and the through hole 373c. The tip of the lead terminal 353b and the lower surface 360b side of the terminal connection portion 360 are electrically and mechanically connected via the solder 353c.

As shown in FIG. 15, a part of the lead terminal 353b is curved so as to be convex in the y direction away from the main body portion 353a. Therefore, as shown in FIG. 17, when the tip end side of the lead terminal 353b is inserted into the connection hole 360c, the curved portion of the lead terminal 353b comes into contact with the edge portion of the connection hole 360c on the upper surface 360a side and the upper surface 360a around the lead terminal 353b. Such contact defines the position of the fuse 353 in the z direction with respect to the terminal connection 360. Further, the bending portion of the lead terminal 353b suppresses the vibration of the main body portion 353a.

<Action effect>
As described above, each of the first detection terminal 351 and the second detection terminal 354 has a terminal connection portion 360 and a spring portion 361 as common components. The lead terminal 353b of the fuse 353 is inserted into the connection hole 360c formed in the terminal connection portion 360. The terminal connection portion 360 and the lead terminal 353b are connected by a solder 353c.

One end of the spring portion 361 is connected to the terminal connection portion 360. The spring portion 361 extends in the z direction from the lower surface 360b of the terminal connecting portion 360 toward the upper surface 360a and also extends in the y direction. The second frame portion 376 comes into contact with the other end of the spring portion 361.

By this contact, the spring portion 361 contracts from the upper surface 360a to the lower surface 360b in the z direction, and elastic force is applied from the spring portion 361 to the second frame portion 376. By fixing the second frame portion 376 to the first frame portion 375, the spring portion 361 is provided in the hollow of the first frame portion 375 in a state of being contracted in the z direction. The first detection terminal 351 and the second detection terminal 354 are fixed to the base portion 373 by the elastic force of the spring portion 361 and the reaction force acting on the elastic force from the second frame portion 376 toward the spring portion 361. NS.

Because of the fixed form shown above, when the base portion 373 vibrates due to an external force, the spring portion 361 elastically deforms in the z direction in response to the vibration. As a result, the vibration of the connected terminal connection portion 360 of the spring portion 361 is suppressed. The action of stress on the solder 353c connecting the terminal connection portion 360 and the lead terminal 353b is suppressed. It is possible to suppress the occurrence of electrical connection failure between the terminal connection portion 360 and the lead terminal 353b.

Note that, unlike the configuration described in this embodiment, a configuration in which the terminal connection portion 360 is sandwiched between the second frame portion 376 fixed to the first frame portion 375 and the base portion 373 can be considered. However, as described above, the protrusion 376f of the second frame portion 376 is fitted into the fitting hole 375f of the first frame portion 375, so that the second frame portion 376 is fixed to the first frame portion 375. The fixed position of the second frame portion 376 with respect to the first frame portion 375 has an error due to the manufacturing error of each of the first frame portion 375 and the second frame portion 376. If such a deviation of the fixed position occurs, there is a possibility that a gap may occur between the terminal connection portion 360 and the second frame portion 376, or between the terminal connection portion 360 and the base portion 373. As a result, the fixed state of the terminal connection portion 360 with respect to the base portion 373 may become unstable.

On the other hand, in the present embodiment, the spring portion 361 integrally connected to the terminal connecting portion 360 as described above is elastically deformed by being pressed by the second frame portion 376. Due to this configuration, even if the fixed position of the second frame portion 376 with respect to the first frame portion 375 fluctuates, between the spring portion 361 and the second frame portion 376, and between the terminal connection portion 360 and the base portion 373. The formation of gaps between them is suppressed. Therefore, it is suppressed that the fixed state of the terminal connection portion 360 with respect to the base portion 373 becomes extremely unstable. As a result, the action of stress on the solder 353c connecting the terminal connection portion 360 and the lead terminal 353b is suppressed.

In this embodiment, one end of two spring portions 361 is connected to the terminal connection portion 360. The connection point of the terminal connection portion 360 at one end of these two spring portions 361 is the fixing point of the base portion 373.

Then, in the first detection terminal 351, the bolt hole 363c of the bolt connection portion 363 is a fixing point with the base portion 373. The connection hole 360c of the terminal connection portion 360 is located in a triangle connecting the bolt hole 363c and the connection point of the terminal connection portion 360 at one end of the two spring portions 361.

In the second detection terminal 354, the defined hole 364a of the second relay portion 364 and the portion pressed against the base portion 373 by the extension frame portion 376i in the voltage detection wiring 355 are fixed points with the base portion 373. .. The connection hole 360c of the terminal connection portion 360 is located in a triangle connecting one of these two fixing points and the connection point of the terminal connection portion 360 at one end of the two spring portions 361.

As shown above, in each of the first detection terminal 351 and the second detection terminal 354, the connection hole 360c corresponding to the connection portion with the lead terminal 353b in the terminal connection portion 360 in the triangle connecting the three fixed points. Is located. Therefore, the position of the connection hole 360c is less likely to change relative to the base portion 373 as compared with the configuration in which the connection hole 360c is located outside the triangle.

Therefore, the relative positional change between the connection hole 360c and the base portion 373 suppresses the action of stress on the solder 353c that connects the terminal connection portion 360 in which the connection hole 360c is formed and the lead terminal 353b. This suppresses the occurrence of electrical connection failure between the terminal connection portion 360 and the lead terminal 353b.

(First modification)
In the present embodiment, an example is shown in which the first frame portion 375 opens on the first upper surface 375c side and the first lower surface 375d side is closed by the base portion 373. On the other hand, in this modification, as shown in FIGS. 18 and 19, the first frame portion 375 is opened on the first upper surface 375c side and the first lower surface 375d side, respectively.

As shown in FIG. 19, when the second frame portion 376 is inserted and fixed to the first frame portion 375, the two spring portions 361 to the second frame portion 376 provided for each of the first detection terminal 351 and the second detection terminal 354 are provided. An elastic force is generated toward. The reaction force against the elastic force acts from the second frame portion 376 to the spring portion 361.

By this elastic force and reaction force, the first detection terminal 351 and the second detection terminal 354 are fixed to the connected base portion 373 of the first frame portion 375 via the second frame portion 376, respectively.

As described above, the first frame portion 375 is connected to the base portion 373. Therefore, even if the first wall portion 377 and the second wall portion 378 are each divided into two by the first slit 375e, these two divided wall portions are connected via the base portion 373. Although only the first frame portion 375 is shown in FIG. 18, the boundary between the first frame portion 375 and the base portion 373 is shown by a alternate long and short dash line.

(Other variants)
In this embodiment, an example in which the fuse 353 is connected to the first detection terminal 351 and the second detection terminal 354 is shown. However, the electronic element connected to the first detection terminal 351 and the second detection terminal 354 is not limited to the above example. It is also possible to adopt a configuration in which passive elements such as resistors and capacitors and active elements such as semiconductor switches and mechanical relays are connected to these two detection terminals.

In this embodiment, an example is shown in which the lead terminal 353b is connected to each of the first detection terminal 351 and the second detection terminal 354 by the solder 353c. However, the conductive adhesive for connecting each of the first detection terminal 351 and the second detection terminal 354 and the lead terminal 353b is not limited to the above example. As the conductive adhesive, for example, silver paste or the like can be adopted.

In this embodiment, an example is shown in which each of the first detection terminal 351 and the second detection terminal 354 has two spring portions 361. However, the number of spring portions 361 possessed by each of the first detection terminal 351 and the second detection terminal 354 is not limited to two, and a single number or three or more can be adopted.

When the first detection terminal 351 has three or more spring portions 361, a polygon having four or more points is formed by connecting the connection point of the terminal connection portion 360 at one end of the three or more spring portions 361 and the bolt hole 363c. Will be done. When the second detection terminal 354 has three or more spring portions 361, the connection point of the terminal connection portion 360 at one end of the three or more spring portions 361 and the fixing point of the base portion 373 of the voltage detection wiring 355 are connected. A polygon with four or more points is formed. It is also possible to adopt a configuration in which the connection hole 360c of the terminal connection portion 360 is located in this polygon.

In this embodiment, an example is shown in which the battery pack 100 has one battery stack in which a plurality of battery cells 210 are arranged in the y direction. However, the battery pack 100 may have two or more battery stacks. The number of battery cells 210 included in each of the two or more battery stacks may be the same or different.

Although the present disclosure has been described in accordance with the examples, it is understood that the present disclosure is not limited to the examples and structures. The present disclosure also includes various variations and variations within a uniform range. In addition, although various combinations and forms are shown in this disclosure, other combinations and forms that include only one element, more, or less are also within the scope of this disclosure. It is a thing.

Claims (11)

1. A connection terminal provided in the resin case (370) and to which the lead terminal (353b) of the electronic element (353) is connected by a conductive adhesive (353c).
   The terminal connection portion (360) to which the lead terminal is connected and
   A connection terminal having a spring portion (361) that is integrally connected to the terminal connection portion and generates an elastic force for fixing the terminal connection portion to the resin case.
2. One end of the spring portion is connected to the terminal connection portion, and the spring portion extends so as to be separated from the terminal connection portion, whereby the spring portion is cantilevered and supported by the terminal connection portion.
   The claim that the elastic force is generated in the spring portion by contacting the pressing portion (376) of the resin case with the other end of the spring portion and contracting the spring portion so as to approach the terminal connection portion. The connection terminal according to 1.
3. The connection terminal according to claim 2, wherein the terminal connection portion is fixed to the base portion (373) of the resin case to which the pressing portion is fixed by the elastic force.
4. A plurality of the spring portions are integrally connected to the terminal connection portion, and the spring portions are integrally connected to the terminal connection portions.
   The connection terminal according to claim 3, wherein a fixing portion (363) having a fixing hole (363c) for bolting to the base portion is connected to the terminal connection portion.
5. In the terminal connection portion, a region surrounded by a polygon connecting a plurality of fixing points fixed to the base portion of the terminal connection portion by the elastic force generated in each of the plurality of spring portions and the fixing holes. The connection terminal according to claim 4, wherein the connection portion (360c) with the lead terminal is located.
6. A plurality of the spring portions are integrally connected to the terminal connection portion, and the spring portions are integrally connected to the terminal connection portions.
   An insulated wire (355) provided in the base portion is connected to the terminal connection portion.
   The connection terminal according to claim 3, wherein the insulated wire is sandwiched between the pressing portion and the base portion.
7. Many connecting a plurality of fixed points fixed to the base portion of the terminal connection portion by the elastic force generated in each of the plurality of spring portions and a pressing point pressed against the base portion by the pressing portion of the insulated wire. The connection terminal according to claim 6, wherein a connection portion (360c) with the lead terminal in the terminal connection portion is located in a region surrounded by a polygon.
8. The connection terminal according to any one of claims 1 to 7, wherein the electronic element is a fuse.
9. The connection terminal according to any one of claims 1 to 8, wherein a conductive portion (335) connected to an electrode terminal (211,212) of a battery cell (210) is electrically connected to the terminal connection portion.
10. With the resin case (370)
    The connection terminals (351,354) fixed to the resin case and
    A terminal module having an electronic element (353) to which a lead terminal (353b) is connected to the connection terminal by a conductive adhesive (353c).
    The connection terminal is
    The terminal connection portion (360) to which the lead terminal is connected and
    A terminal module having a spring portion (361) that is integrally connected to the terminal connection portion and generates an elastic force for fixing the terminal connection portion to the resin case.
11. The resin case includes a base portion (373) and a pressing portion (376) fixed to the base portion.
    The spring portion contracts due to contact with the pressing portion to generate the elastic force.
    The terminal module according to claim 10, wherein the connection terminal is fixed to the base portion by the elastic force.

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