Prática de Shadowing: Step-by-step Demonstration: High-Voltage Battery Repair - Aprenda a falar inglês com vídeo
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We're here at Precision Auto Service in Langley, BC, where a customer has brought in a 2016 Fiat 500E for repair.
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The car was towed all the way from Vernon, BC, over 400 kilometers away from the shop.
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The customer reported that the car would not go into ready mode.
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The dealership had told the customer
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that the entire battery pack would have to be replaced at a cost of around $20 ,000, and that was if a replacement could be found.
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Precision Auto's diagnosis revealed a fault within the battery pack control module.
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Replacement BPCMs are not readily available either, but Precision Auto is well connected and was able to source one from a company in Europe.
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After the replacement module arrived, it was time to perform the repair.
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The first step is to disconnect the 12 volt battery.
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Yes, most EVs have a 12 volt battery to run accessories like lights, wipers and infotainment systems.
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Next, the high voltage service plug is removed.
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On this model it is located under the rear seat.
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The service plug is like a giant fuse, this one is 350 amps.
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Once removed, the high voltage is isolated to the inside of the battery pack, making it safe to work on the vehicle.
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The battery pack is removed from under the car, so the car is lifted with a hoist.
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On the Fiat, the battery pack extends from just rear of the front wheels almost to the back of the car.
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The rearward part is where the fuel tank would be on a gas -powered car.
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Several metal protective covers are removed.
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This exposes the main high voltage cables, which are colored orange, and the cooling system hoses.
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This battery is liquid cooled.
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Even though the high voltage battery has been isolated, the technician puts on rubber electrical safety gloves before proceeding with the next steps.
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To ensure there are no pinholes, the gloves are tested before each use.
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This is done by rolling up the open ends of the gloves, pressurizing the air inside.
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Then the gloves are held to the cheek to check for air leaks.
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Once the gloves have passed the test, a pair of work over gloves are worn over them.
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Now the technician is ready to disconnect the electrical cables from the battery pack, starting with the main line and then the secondary line.
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He places a catchment vessel on a scissor lift table directly beneath the coolant hoses,
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clamps the hoses, and then loosens the clamps where the hoses connect to the fittings on the battery pack housing.
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The coolant drains into the catchment vessel.
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to prevent further spillage while the battery pack is being removed he places caps on the coolant fittings
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because the battery pack goes over the top of the rear axle the complete rear axle and suspension is removed.
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When the battery pack is removed, it is going to drastically change the weight distribution of the vehicle,
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so the technician secures the front and rear of the vehicle with supports beforehand.
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The technician places the scissor lift table beneath the battery and raises it until it contacts the bottom of the battery case.
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Now the main bolts can be removed
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With all the bolts removed, the table and battery pack are lowered together.
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This vehicle had a considerable amount of mud caked on its underside, so the battery pack cover must be cleaned before it can be opened.
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No debris should be allowed to contaminate the interior of the battery case.
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The technician uses a shop vac and compressed air to remove loose mud and dust.
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Several dozen bolts hold the top and bottom halves of the battery pack case together.
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These are removed.
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The top half of the case can now be lifted off, exposing the components of the battery
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The technician conducts some tests, verifying voltage readings to ensure there are no other problems.
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Satisfied with the results, he disconnects the cables from the connectors on the BPC -M and removes the module.
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He then installs the replacement module.
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The battery pack is now ready to be reinstalled in the vehicle.
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When an electric vehicle's high voltage battery malfunctions, it does not always mean that the entire battery pack must be replaced.
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The most common reason a complete replacement will be recommended is
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because currently there are very few businesses that possess the resources necessary to perform battery pack diagnosis and repair.
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It is much easier to simply swap out the entire battery pack
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that said the price of a replacement battery pack is usually prohibitive
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and in many cases availability is scarce this will change over
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time as with any new consumer product prices will come down as demand
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and production increase this will be true not only for complete battery packs
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but also for the internal components precision auto service is presently one of very few repair facilities
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that have invested in the tools, equipment and training necessary to diagnose and repair high voltage batteries and other EV components.
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This too will change as shops start to see a larger portion of their customer base driving electric vehicles.
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Vocabulário e dicas de fala para esta lição
Este vídeo tem 57 frases e 852 palavras para praticar shadowing. A fala dura 8:46. O falante fala devagar, cerca de 97 palavras por minuto, o que dá tempo para imitar cada som. Apenas 77% das palavras estão entre as 3.000 mais comuns do inglês, por isso o vocabulário é exigente.
Vocabulário principal deste vídeo
15 palavras do vídeo que vale a pena aprender, com pronúncia e significado:
| Palavra | Pronúncia | Significado |
|---|---|---|
| voltage substantivo | /ˈvəʊltɪd͡ʒ/ | tensão, voltagem |
| replacement substantivo | /ɹɪˈpleɪsmənt/ | substituto |
| glove substantivo | /ɡlʌv/ | luva |
| technician substantivo | /tɛkˈnɪʃən/ | técnico |
| repair verbo | /ˈɹiːpɛɚ/ | reparar |
| precision substantivo | /pɹɪˈsɪʒ.ən/ | precisão |
| module substantivo | /ˈmɑd͡ʒul/ | módulo |
| hose substantivo | /hoʊz/ | mangueira, borracha |
| component substantivo | /kəmˈpoʊ.nənt/ | componente |
| bolt substantivo | /boʊlt/ | parafuso |
| automobile substantivo | /ˈɔː.tə.məˌbil/ | automóvel, carro |
| connect verbo | /kəˈnɛkt/ | conectar |
| vessel substantivo | /ˈvɛsəl/ | barco, navio |
| beneath | /bɪˈniːθ/ | embaixo de |
| diagnosis substantivo | /daɪəɡˈnəʊsɪs/ | diagnóstico |
Phrasal verbs que você vai ouvir
| Palavra | Significado |
|---|---|
| roll up verbo | enrolar |
Gramática neste vídeo
As estruturas que o falante mais usa, com as palavras exatas do vídeo:
| Estrutura | No vídeo |
|---|---|
| Voz passiva be + particípio passado — o foco está no que acontece, não em quem faz | was towed · be replaced · is removed |
| Present perfect have/has + particípio passado — uma ação passada que ainda importa agora | has brought · has been isolated · have passed |
Pronúncia para ficar de olho
- Os sons de “sh” e “zh”: technician /tɛkˈnɪʃən/, precision /pɹɪˈsɪʒ.ən/, suspension /səˈspɛnʃən/, dealership /ˈdiːləʃɪp/, malfunction /ˌmælˈfʌŋk.ʃən/
- Palavras longas — acerte a sílaba tônica: automobile /ˈɔː.tə.məˌbil/, electrical /ɪˈlɛktɹɪkəl/, considerable /kənˈsɪdəɹəbl̩/, availability /əˌveɪ.ləˈbɪl.ɪ.ti/, accessory /əkˈsɛs.(ə.)ɹi/
Como praticar com este vídeo
- Ouça o vídeo inteiro uma vez sem falar e anote as palavras que você não conhece.
- Faça shadowing frase por frase na velocidade normal, repetindo cada uma até o seu ritmo ficar igual ao do falante.
- Grave a sua voz e compare com o original, prestando atenção a palavras como voltage, replacement, glove.
O que é a Técnica de Shadowing?
Shadowing é uma técnica de aprendizado de idiomas com base científica, originalmente desenvolvida para o treinamento de intérpretes profissionais. O método é simples, mas poderoso: você ouve áudio em inglês nativo e repete imediatamente em voz alta — como uma sombra seguindo o falante com 1-2 segundos de atraso. Pesquisas mostram melhora significativa na precisão da pronúncia, entonação, ritmo, sons conectados, compreensão auditiva e fluência na fala.