JP2015035841A - 建設機械の蓄電装置充放電制御装置 - Google Patents
建設機械の蓄電装置充放電制御装置 Download PDFInfo
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- JP2015035841A JP2015035841A JP2013164263A JP2013164263A JP2015035841A JP 2015035841 A JP2015035841 A JP 2015035841A JP 2013164263 A JP2013164263 A JP 2013164263A JP 2013164263 A JP2013164263 A JP 2013164263A JP 2015035841 A JP2015035841 A JP 2015035841A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
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- B60K6/485—Motor-assist type
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
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- E02F9/2058—Electric or electro-mechanical or mechanical control devices of vehicle sub-units
- E02F9/2091—Control of energy storage means for electrical energy, e.g. battery or capacitors
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Abstract
【解決手段】温度状態判定手段(61)は、温度状態検出手段(37)により検出された温度(Tz)に基づいて、温度状態判定手段(61)に予め設定された「低温状態」に蓄電装置(31)の温度状態が該当するか否かを判定する。充放電電力上限値設定手段65は、温度状態判定手段(61)により蓄電装置(31)が「低温状態」に該当すると判定された場合、使用モジュール温度設定手段(63)に選択された最低モジュール温度Tminに基づいて、蓄電装置(31)の充放電電力の上限値を設定する。
【選択図】図3
Description
(低温状態(Tz<T1))図2に示すように、温度Tzが状態判定閾値T1(図中「閾値T1」)よりも小さい場合(S1でYES)、図1に示す温度状態判定手段61は、蓄電装置31の温度状態が「低温状態」であると判定する。
(常温状態(T1≦Tz≦T2))図2に示すように、温度Tzが状態判定閾値T1以上(S1でNO)、かつ、温度Tzが状態判定閾値T2(図中「閾値T2」)以下の場合(S2でYES)、図1に示す温度状態判定手段61は、蓄電装置31の温度状態が「常温状態」であると判定する。
(高温状態(Tz>T2))図2に示すように、温度Tzが状態判定閾値T2を超える場合(S2でNO)、図1に示す温度状態判定手段61は、蓄電装置31の温度状態が「高温状態」であると判定する。
蓄電装置パワー設定手段60の動作を説明する。
温度状態判定手段61により、蓄電装置31の温度状態が「低温状態」に該当すると判定された場合の動作は、次の[動作A−1]及び[動作A−2]の通りである(判定の詳細については上述した通りである)。
[動作A−1]使用モジュール温度設定手段63は、モジュール温度検出手段33により検出された複数のモジュール温度Ta,Tb,Tc,・・・のうち最低温度である最低モジュール温度Tminを選択する。
[動作A−2]図3の「(a)低温状態の場合」に示すように、充放電電力上限値設定手段65は、最低モジュール温度Tmin及び充電率SOCに基づいて、蓄電装置31(図1参照)の充放電電力上限値を設定する(図2のS3)。蓄電装置31の充電率SOCが一定値であるとすると、蓄電装置31の温度状態が「低温状態」のときの充電電力上限値は、「常温状態」のときの充電電力上限値よりも小さく設定される(放電電力上限値についても同様)。その結果、蓄電装置31の充放電時の過電圧が抑制される。
図1に示す温度状態判定手段61により、蓄電装置31の温度状態が「常温状態」に該当すると判定された場合の動作は、次の[動作B−1]及び[動作B−2]の通りである。
[動作B−1]使用モジュール温度設定手段63は、モジュール温度検出手段33により検出された複数のモジュール温度Ta,Tb,Tc,・・・の平均温度である平均モジュール温度Taveを算出する。
[動作B−2]図3の「(b)常温状態の場合」に示すように、充放電電力上限値設定手段65は、平均モジュール温度Tave及び充電率SOCに基づいて、蓄電装置31(図1参照)の充放電電力上限値を設定する(図2のS4)。
図1に示す温度状態判定手段61により、蓄電装置31の温度状態が「高温状態」に該当すると判定された場合の動作は、次の[動作C−1]及び[動作C−2]の通りである。
次に、図1に示す蓄電装置充放電制御装置1による効果を説明する。蓄電装置充放電制御装置1は、電動機(発電電動機13及び旋回電動機21のうち少なくとも一方)と、電動機との間で電力の授受を行い複数の蓄電モジュール31mを備える蓄電装置31と、蓄電装置31に関する温度Tzを検出する温度状態検出手段37と、温度状態判定手段61と、蓄電モジュール31mの温度であるモジュール温度を複数の蓄電モジュール31mそれぞれについて検出するモジュール温度検出手段33と、モジュール温度検出手段33により検出された複数のモジュール温度Ta,Tb,Tc,・・・のうち最低温度である最低モジュール温度Tminを選択する使用モジュール温度設定手段63と、充放電電力上限値設定手段65と、を備える。
温度状態判定手段61は、温度状態検出手段37により検出された温度Tzに基づいて、蓄電装置31の温度状態が、温度状態判定手段61に予め設定された「低温状態」に該当するか否かを判定する。
[構成1]充放電電力上限値設定手段65は、温度状態判定手段61により蓄電装置31が「低温状態」に該当すると判定された場合、使用モジュール温度設定手段63に選択された最低モジュール温度Tminに基づいて、蓄電装置31の充放電電力上限値(充放電電力の上限値)を設定する(図3の「(a)低温状態の場合」参照)。
また、上記[構成1]では、温度状態判定手段61により蓄電装置31が「低温状態」に該当すると判定された場合に、最低モジュール温度Tminに基づいて充放電電力上限値が設定される。この「低温状態」の条件(温度Tzの範囲)を、上記の過電圧の問題が生じやすい条件に設定した場合は、上記の過電圧抑制効果の必要性に応じて過電圧抑制効果を得ることができる。
温度状態判定手段61は、温度状態検出手段37により検出された温度Tzに基づいて、蓄電装置31の温度状態が、温度状態判定手段61に予め設定された「高温状態」に該当するか否かを判定する。使用モジュール温度設定手段63は、モジュール温度検出手段33により検出された複数のモジュール温度Ta,Tb,Tc,・・・のうち最高温度である最高モジュール温度Tmaxを選択する。
[構成2]充放電電力上限値設定手段65は、温度状態判定手段61により蓄電装置31が「高温状態」に該当すると判定された場合、使用モジュール温度設定手段63に選択された最高モジュール温度Tmaxに基づいて、蓄電装置31の充放電電力上限値を設定する(図3の「(c)高温状態の場合」参照)。
また、上記[構成2]では、温度状態判定手段61により蓄電装置31が「高温状態」に該当すると判定された場合に、最高モジュール温度Tmaxに基づいて充放電電力上限値が設定される。この「高温状態」の条件(温度Tzの範囲)を、上記のオーバーヒートの問題が生じやすい条件に設定した場合は、上記のオーバーヒート抑制効果の必要性に応じてオーバーヒート抑制効果を得ることができる。
温度状態判定手段61は、温度状態検出手段37により検出された温度Tzに基づいて、蓄電装置31の温度状態が、温度状態判定手段61に予め設定された「常温状態」に該当するか否かを判定する。使用モジュール温度設定手段63は、モジュール温度検出手段33により検出された複数のモジュール温度Ta,Tb,Tc,・・・の平均温度である平均モジュール温度Taveを算出する。
[構成3]充放電電力上限値設定手段65は、温度状態判定手段61により蓄電装置31が「常温状態」に該当すると判定された場合、使用モジュール温度設定手段63に算出された平均モジュール温度Taveに基づいて、蓄電装置31の充放電電力上限値を設定する(図3の「(b)常温状態の場合」参照)。
一方、上記[構成3]では、温度状態判定手段61により蓄電装置31が「常温状態」に該当すると判定された場合に、平均モジュール温度Taveに基づいて充放電電力上限値が設定される。この「常温状態」の条件(温度Tzの範囲)を、上記の過電圧やオーバーヒートの問題が生じにくい条件に設定した場合は、上記問題が生じにくいにもかかわらず蓄電装置31の能力を制限しすぎるという問題を抑制できる。その結果、蓄電装置31の能力を活かしやすい。
蓄電装置充放電制御装置1は、蓄電装置31に設けられるとともに冷却流体(例えば冷却水35f)により蓄電装置31を冷却する流体冷却手段35を備える。温度状態検出手段37が検出する温度Tzは、蓄電装置31冷却中または蓄電装置31冷却後の冷却水35fの温度Tzである。温度状態判定手段61には、蓄電装置31の温度状態を判定するための状態判定閾値T1,T2が予め設定される。温度状態判定手段61は、温度状態検出手段37により検出された冷却水35fの温度Tzと状態判定閾値T1,T2とを対比することにより、蓄電装置31の温度状態を判定する。
流体冷却手段35は、冷却水35fにより蓄電装置31を冷却する水冷冷却手段である。温度状態検出手段37が検出する温度Tzは、蓄電装置31冷却中または蓄電装置31冷却後の冷却水35fの温度である。
上記実施形態の流体冷却手段35および温度状態検出手段37の変形例について、上記実施形態との相違点を説明する。上記実施形態では、流体冷却手段35は、冷却水35fにより蓄電装置31を冷却する水冷冷却手段であった。また、温度状態検出手段37が検出する温度Tzは、蓄電装置31冷却中または蓄電装置31冷却後の冷却水35fの温度Tzであった。
一方、変形例1では、流体冷却手段35は、蓄電装置31の内部を流れる冷却空気135fにより蓄電装置31を冷却する空気冷却手段である。温度状態検出手段37が検出する温度Tzは、蓄電装置31の内部雰囲気温度(蓄電装置31冷却中の冷却空気135fの温度)、または、蓄電装置31の外に排気された(蓄電装置31冷却後の)冷却空気135fの温度である。
上記実施形態の温度状態検出手段37の変形例について、上記実施形態との相違点を説明する。上記実施形態では、温度状態検出手段37が検出する温度Tzは、蓄電装置31冷却中等の冷却水35fの温度であった。
一方、変形例2では、温度状態検出手段37が検出する温度Tzは、モジュール温度検出手段33により検出された複数のモジュール温度Ta,Tb,Tc,・・・の平均温度である平均モジュール温度Taveである。温度状態判定手段61は、温度状態検出手段37により検出された平均モジュール温度Tave(=温度Tz)と状態判定閾値T1,T2とを対比することにより、蓄電装置31の温度状態を判定する。
上記実施形態はさらに様々に変形できる。例えば、上記実施形態では、温度状態判定手段61には、「低温状態」、「常温状態」、及び「高温状態」の3段階の温度状態が予め設定された。しかし、温度状態判定手段61に設定される温度状態の数は、例えば2段階でもよく、また例えば4段階以上でもよい。
例えば、温度状態判定手段61には、「低温状態」及び「常温状態」の2段階のみ設定されてもよく、また、「高温状態」及び「常温状態」の2段階のみ設定されてもよい。
また例えば、温度状態判定手段61には、「低温状態」と「常温状態」との間の温度状態や、「常温状態」と「高温の温度」との間の温度状態が設定されてもよい。例えば、「低温状態」と「常温状態」との間の温度状態のときは、充放電電力上限値設定手段65は、最低モジュール温度Tminと平均モジュール温度Taveと間の温度に基づいて充放電電力上限値を設定してもよい。また、「常温状態」と「高温状態」との間の温度状態のときは、充放電電力上限値設定手段65は、平均モジュール温度Taveと最高モジュール温度Tmaxとの間の温度に基づいて充放電電力上限値を設定してもよい。
13 発電電動機(電動機)
21 旋回電動機(電動機)
31 蓄電装置
31m 蓄電モジュール
33 モジュール温度検出手段
35 流体冷却手段
35f 冷却水(冷却流体)
37 温度状態検出手段
61 温度状態判定手段
63 使用モジュール温度設定手段
65 充放電電力上限値設定手段
135f 冷却空気(冷却流体)
T1、T2 状態判定閾値
Ta,Tb,Tc,・・・ モジュール温度
Tave 平均モジュール温度
Tmax 最高モジュール温度
Tmin 最低モジュール温度
Claims (7)
- 電動機と、
前記電動機との間で電力の授受を行い、複数の蓄電モジュールを備える蓄電装置と、
前記蓄電装置に関する温度を検出する温度状態検出手段と、
前記温度状態検出手段により検出された温度に基づいて、前記蓄電装置の温度状態が、予め設定された低温状態に該当するか否かを判定する温度状態判定手段と、
前記蓄電モジュールの温度であるモジュール温度を複数の前記蓄電モジュールそれぞれについて検出するモジュール温度検出手段と、
前記モジュール温度検出手段により検出された複数の前記モジュール温度のうち最低温度である最低モジュール温度を選択する使用モジュール温度設定手段と、
前記温度状態判定手段により前記蓄電装置が前記低温状態に該当すると判定された場合、前記使用モジュール温度設定手段に選択された前記最低モジュール温度に基づいて、前記蓄電装置の充放電電力の上限値を設定する充放電電力上限値設定手段と、
を備える建設機械の蓄電装置充放電制御装置。 - 電動機と、
前記電動機との間で電力の授受を行い、複数の蓄電モジュールを備える蓄電装置と、
前記蓄電装置に関する温度を検出する温度状態検出手段と、
前記温度状態検出手段により検出された温度に基づいて、前記蓄電装置の温度状態が、予め設定された高温状態に該当するか否かを判定する温度状態判定手段と、
前記蓄電モジュールの温度であるモジュール温度を複数の前記蓄電モジュールそれぞれについて検出するモジュール温度検出手段と、
前記モジュール温度検出手段により検出された複数の前記モジュール温度のうち最高温度である最高モジュール温度を選択する使用モジュール温度設定手段と、
前記温度状態判定手段により前記蓄電装置が前記高温状態に該当すると判定された場合、前記使用モジュール温度設定手段に選択された前記最高モジュール温度に基づいて、前記蓄電装置の充放電電力の上限値を設定する充放電電力上限値設定手段と、
を備える建設機械の蓄電装置充放電制御装置。 - 前記温度状態判定手段は、前記温度状態検出手段により検出された温度に基づいて、前記蓄電装置の温度状態が、前記温度状態判定手段に予め設定された常温状態に該当するか否かを判定し、
前記使用モジュール温度設定手段は、前記モジュール温度検出手段により検出された複数の前記モジュール温度の平均温度である平均モジュール温度を算出し、
前記充放電電力上限値設定手段は、前記温度状態判定手段により前記蓄電装置が前記常温状態に該当すると判定された場合、前記使用モジュール温度設定手段に算出された前記平均モジュール温度に基づいて、前記蓄電装置の充放電電力の上限値を設定する、
請求項1または2に記載の建設機械の蓄電装置充放電制御装置。 - 前記温度状態検出手段が検出する温度は、前記モジュール温度検出手段により検出された複数の前記モジュール温度の平均温度である平均モジュール温度であり、
前記温度状態判定手段には、前記蓄電装置の温度状態を判定するための状態判定閾値が予め設定され、
前記温度状態判定手段は、前記温度状態検出手段により検出された前記平均モジュール温度と前記状態判定閾値とを対比することにより、前記蓄電装置の温度状態を判定する、
請求項1〜3のいずれかに記載の建設機械の蓄電装置充放電制御装置。 - 前記蓄電装置に設けられるとともに冷却流体により前記蓄電装置を冷却する流体冷却手段を備え、
前記温度状態検出手段が検出する温度は、前記蓄電装置冷却中または前記蓄電装置冷却後の前記冷却流体の温度であり、
前記温度状態判定手段には、前記蓄電装置の温度状態を判定するための状態判定閾値が予め設定され、
前記温度状態判定手段は、前記温度状態検出手段により検出された前記冷却流体の温度と前記状態判定閾値とを対比することにより、前記蓄電装置の温度状態を判定する、
請求項1〜3のいずれかに記載の建設機械の蓄電装置充放電制御装置。 - 前記流体冷却手段は、前記蓄電装置の内部を流れる冷却空気により前記蓄電装置を冷却する空気冷却手段であり、
前記温度状態検出手段が検出する温度は、前記蓄電装置の内部雰囲気温度または前記蓄電装置の外に排気された前記冷却空気の温度である、
請求項5に記載の建設機械の蓄電装置充放電制御装置。 - 前記流体冷却手段は、冷却水により前記蓄電装置を冷却する水冷冷却手段であり、
前記温度状態検出手段が検出する温度は、前記蓄電装置冷却中または前記蓄電装置冷却後の前記冷却水の温度である、
請求項5に記載の建設機械の蓄電装置充放電制御装置。
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