# US 2019/0174647 A1 · Electrical device and manufacturing method of the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0174647 A1 - Document ID: US20190174647A1 - Status: Published application - Kind: A1 - Application number: 16/204,430 - Filed: 2018-11-29 - Published: 2019-06-06 - Earliest claimed: 2017-12-06 - Assignees: Toyota Jidosha Kabushiki Kaisha; Denso Corporation - Applicants: Toyota Jidosha Kabushiki Kaisha; Denso Corporation - Inventors: Hiroki UMEDA; Kenshi YAMANAKA; Shinichi MIURA; Hiromi YAMASAKI; Hitoshi IMURA; Yutaka MORIMOTO; Kazuki HAYASHI; Hideaki TACHIBANA; Yoshiki KAWAGUCHI - Web page: https://patentgrep.com/patent/US20190174647A1 ## CPC - H05K 7/14329: {specially adapted for the configuration of power bus bars} - B60L 50/51: characterised by AC-motors - H02B 1/32: Mounting of devices therein - H02M 3/1584: {with a plurality of power processing stages connected in parallel} - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES - H02B: BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER - H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract An electrical device is provided. The electrical device includes a case, a first electrical part, a second electrical part, and a connecting portion. The case includes a first case and a second case coupled to the first case. The first electrical part is fixed to the first case. The second electrical part is fixed to the second case. The connecting portion is configured to connect a first conductor extending from the first electrical part and a second conductor extending from the second electrical part each other. Either one of the first case and the second case includes a through hole. The connecting portion is disposed so as to be entirely visible from the through hole as viewed from an outside of the case. ## Claims ### Claim 1 An electrical device comprising: a case including a first case and a second case coupled to the first case; a first electrical part fixed to the first case; a second electrical part fixed to the second case; and a connecting portion configured to connect a first conductor extending from the first electrical part and a second conductor extending from the second electrical part each other, wherein either one of the first case and the second case includes a through hole, and the connecting portion is disposed so as to be entirely visible from the through hole as viewed from an outside of the case. ### Claim 2 (depends on 1) The electrical device according to claim 1, wherein the through hole is configured to allow attachment of a connector of a cable connecting the electrical device and another electrical device. ### Claim 3 (depends on 2) The electrical device according to claim 2, wherein the first electrical part and the second electrical part are configured to be connected to a motor via the cable. ### Claim 4 (depends on 2) The electrical device according to claim 2, further comprising a terminal block supporting a terminal to which the connector is connected, wherein: the terminal block is disposed so as to be visible from the through hole as viewed from the outside of the case; and the connecting portion is disposed on the terminal block. ### Claim 5 (depends on 1) The electrical device according to claim 1, wherein the connecting portion is configured to connect the first conductor and the second conductor via a bolt. ### Claim 6 (depends on 5) The electrical device according to claim 5, wherein either one of the first case and the second case, which includes the through hole, includes a protrusion that narrows a clearance width around the connecting portion on an inner side of the through hole down to a width that does not allow a bolt-head of the bolt to pass through the clearance. ### Claim 7 (depends on 1) The electrical device according to claim 1, wherein: the first electrical part and the second electrical part are included in a power converter that converts power of a power source to power to drive a motor for traveling; the first electrical part includes a power module housing a switching element included in a voltage boost converter circuit that boosts the voltage of the power source; and the second electrical part includes a reactor included in the voltage boost converter circuit. ### Claim 8 (depends on 7) The electrical device according to claim 7, wherein: the second case is disposed below the first case; and the second electrical part includes a voltage converter circuit that converts the voltage of the power source. ### Claim 9 (depends on 7) The electrical device according to claim 7, wherein: the first case includes a second opening that is different from a first opening provided on a side of the first case, on which the first case is coupled to the second case; a control board configured to control the power module is fixed to the first case such that the control board is disposed so as to be visible from the second opening; and the second opening is covered with a cover. ### Claim 10 (depends on 1) The electrical device according to claim 1, wherein: the second electrical part is a reactor; the connecting portion is placed on the reactor; and the reactor includes a female thread that threadedly engages with a bolt connecting the first conductor and the second conductor. ### Claim 11 (depends on 1) The electrical device according to claim 1, wherein: the second electrical part is a reactor, and the reactor is placed in the case below a layered body of a cooling unit and a power module. ### Claim 12 (depends on 1) The electrical device according to claim 1, wherein: the second electrical part is a reactor; the connecting portion is placed on the reactor; and at least a part of the reactor is disposed so as to be visible from the through hole as viewed from an outside of the case. ### Claim 13 (depends on 1) The electrical device according to claim 1, wherein: the second electrical part is a reactor; and the second case is provided with a cooling unit that cools the reactor. ### Claim 14 (depends on 1) The electrical device according to claim 1, wherein: the first electrical part is a power module housing a power semiconductor element for converting power; the second electrical part is a reactor; and the power module is placed between a control board configured to control the power module and the reactor. ### Claim 15 (depends on 1) The electrical device according to claim 1, wherein: the second electrical part is a reactor; and a center of gravity of the reactor is shifted from a center of a bottom surface of the second case. ### Claim 16 (depends on 4) The electrical device according to claim 4, wherein: the second electrical part is a reactor; the reactor is placed between the terminal block and a capacitor in a horizontal direction; and the reactor is disposed closer to the terminal block than to the capacitor. ### Claim 17 A manufacturing method of an electrical device, the electrical device including a case including a first case and a second case coupled to the first case, a first electrical part fixed to the first case, a second electrical part fixed to the second case, and a connecting portion configured to connect a first conductor extending from the first electrical part and a second conductor extending from the second electrical part each other, either one of the first case and the second case including a through hole, and the connecting portion being disposed so as to be entirely visible from the through hole as viewed from an outside of the case, the manufacturing method comprising: fixing the first electrical part to the first case; fixing the second electrical part to the second case; coupling the first case to the second case; and connecting the first conductor to the second conductor with a connecting tool via the through hole.