CN105216632A - For Vehicular battery group management system and method - Google Patents
For Vehicular battery group management system and method Download PDFInfo
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- CN105216632A CN105216632A CN201410307920.8A CN201410307920A CN105216632A CN 105216632 A CN105216632 A CN 105216632A CN 201410307920 A CN201410307920 A CN 201410307920A CN 105216632 A CN105216632 A CN 105216632A
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- 238000000034 method Methods 0.000 title claims abstract description 63
- 238000007726 management method Methods 0.000 claims description 99
- 238000001816 cooling Methods 0.000 claims description 30
- 239000007788 liquid Substances 0.000 claims description 11
- 230000004044 response Effects 0.000 claims description 11
- 239000008188 pellet Substances 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 description 19
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 9
- 238000010586 diagram Methods 0.000 description 9
- 229910052744 lithium Inorganic materials 0.000 description 9
- 230000005855 radiation Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses a kind of Vehicular battery group management system and method.Described system comprises: positive switch, is arranged between the positive pole of described battery pack and described vehicle load, and described positive switch is in series electrically connected with described battery and described vehicle load; Negative switch, is arranged between the negative pole of described battery pack and described vehicle load, and described negative switch is in series electrically connected with described battery pack and described vehicle load; Described system also comprises: the first resistance and the first switch, and described first resistance and described first switch are in series electrically connected, and described first resistance of series connection and described first switch are electrically connected in parallel with described vehicle load; Battery management unit, for closed described positive switch and described negative switch, and closes or disconnects described first switch to control the temperature of described battery; And disconnect described positive switch and described negative switch when vehicle has an accident, and closed described first switch is to discharge described vehicle load.
Description
Technical field
The present invention relates generally to vehicle electric field, relates more specifically to a kind of Vehicular battery group management system and method.
Background technology
In vehicle, high pressure (HV) system, comprises battery, inverter, motor etc., has strict security requirement.Particularly in case of emergency, during as having an accident, fast also reliably by high tension supply, such as battery pack, from other parts of high-pressure system, such as vehicle load disconnects, and is vital.In addition the important point is as quickly as possible by other partial discharges of high-pressure system, dissipates out of control to prevent electric charge.Such as, prevent system component, as cable, time damaged, produce arc event.In addition, in vehicle load, as electro-motor or power supply other parts from inverter unit to high-pressure system continue power supply when, as due to after accident or when causing wheel to rotate freely after the control losing conv, although high voltage bus, high-tension battery disconnect completely, but the delivery system of dump energy will lose efficacy, and other parts of high-pressure system are caused to be unsafe at concerned power in long-time.In this case, when a vehicle collision occurs, need to provide sooner, more failure-free solution to be to disconnect battery pack and vehicle load or to make vehicle load discharge.
On the other hand, the battery used in vehicle, in certain range of temperatures, such as lithium cell, the marked change along with the change of temperature of its internal resistance.Lithium battery interior resistance reduces when the temperature increases, and the efficiency of lithium cell improves thereupon, and battery can in higher power level work.And when temperature is very low, lithium cell can not work at all.Therefore, when the temperature of lithium cell is too low, needs lithium cell to heat, could use in cold environment.Usually, utilize the air cooling system of vehicle, by the air in use operator's compartment as the source of heating or cool, come to heat lithium cell.But when temperature is very low, damp and hot cabin air can cause aqueous vapor to condense on cold battery component.If need to remove condensation, still need to heat battery pack from inside, need to provide extra heater block and provide the power supply of electric energy for heater block, make the structure of battery circuit more complicated, add cost.
Summary of the invention
In view of the above problems, propose the present invention, to provide a kind of Vehicular battery group management system and method, to overcome the problems referred to above or to solve the problem at least in part.
According to a first aspect of the present invention, provide a kind of Vehicular battery group management system, described system comprises: positive switch, is arranged between the positive pole of described battery pack and described vehicle load, and described positive switch is in series electrically connected with described battery and described vehicle load; Negative switch, is arranged between the negative pole of described battery pack and described vehicle load, and described negative switch is in series electrically connected with described battery pack and described vehicle load; Described system also comprises: the first resistance and the first switch, and described first resistance and described first switch are in series electrically connected, and described first resistance of series connection and described first switch are electrically connected in parallel with described vehicle load; Battery management unit, for closed described positive switch and described negative switch, and closes or disconnects described first switch to control the temperature of described battery; And disconnect described positive switch and described negative switch when vehicle has an accident, and closed described first switch is to discharge described vehicle load.
According to an embodiment of the present invention, wherein said battery management unit and control unit for vehicle or safety air bag control unit communicate to connect; And described battery management unit also for: when vehicle has an accident, receive control unit for vehicle (ECU) or the accident signal that sends of safety air bag control unit (ACU); And in response to described accident signal, disconnect described positive switch and described negative switch, and closed described first switch is to discharge described vehicle load.
According to an embodiment of the present invention, wherein said battery management unit is also for closed described positive switch and described negative switch; Measure the temperature of described battery pack; By measured temperature compared with predetermined temperature threshold; When measured temperature is less than described temperature threshold, closed described first switch; When measured temperature is equal to or greater than described temperature threshold, disconnect closed described first switch.
According to an embodiment of the present invention, wherein said battery pack comprises multiple battery unit be in series electrically connected, and distance between each described battery unit with described first resistance is equal.
According to an embodiment of the present invention, wherein said battery pack is dispelled the heat by the air cooling system of described vehicle, and described first resistance is arranged on the air intake place of described air cooling system.
According to an embodiment of the present invention, wherein said first resistance is the first resistance that several are in series electrically connected, and several first resistance described are evenly distributed in described battery pack.
According to an embodiment of the present invention, wherein said battery pack is dispelled the heat by the liquid cooling system of described vehicle, and several first resistance described are near described battery pack.
According to an embodiment of the present invention, wherein said battery pack comprises multiple battery unit be in series electrically connected, described system also comprises: several second switches, and each of several second switches described is electrically connected in parallel with each in several first resistance described respectively; And described battery management unit is also for closed described positive switch and described negative switch, and closed described first switch; Respectively closed or disconnect in second switch described in several each, to control the temperature of each in described multiple battery unit respectively.
According to an embodiment of the present invention, wherein said battery management unit also for: when described positive switch and described negative switch cannot disconnect, closed described first switch, by the energy of battery pack described in described first resistance consumption.
According to an embodiment of the present invention, described system also comprises the betal can be arranged on outside described first resistance.
According to an embodiment of the present invention, wherein said first resistance is set to prism-shaped, cylindric or sheet.
According to an embodiment of the present invention, wherein said first resistance is set to multiple pellet resistances in parallel.
According to an embodiment of the present invention, described system also comprises pre-charge resistance and precharge switch, described pre-charge resistance is in series electrically connected with described precharge switch, and the pre-charge resistance of described series connection and described precharge switch are set to be electrically connected in parallel with described positive switch; And before closed described positive switch and described negative switch, described battery management unit also for: disconnect described first switch and described positive switch; Closed described precharge switch and described negative switch, being described vehicle load precharge by described battery pack; And after precharge completes, disconnect described precharge switch.
According to a second aspect of the invention, provide a kind of Vehicular battery group management system, comprising: positive switch, be arranged between the positive pole of described battery pack and described vehicle load, described positive switch is in series electrically connected with described battery and described vehicle load; Negative switch, is arranged between the negative pole of described battery pack and described vehicle load, and described negative switch is in series electrically connected with described battery pack and described vehicle load; First resistance and the first switch, described first resistance and described first switch are in series electrically connected, and described first resistance of series connection and described first switch are electrically connected in parallel with described vehicle load; Battery management unit, for closed described positive switch and described negative switch, and closes or disconnects described first switch to control the temperature of described battery pack; Described positive switch is detected and whether described negative switch cannot disconnect when vehicle has an accident; And when described positive switch being detected and described negative switch cannot disconnect, closed described first switch, by the energy of battery pack described in described first resistance consumption.
According to an embodiment of the present invention, wherein said battery management unit also for: when vehicle has an accident, receive the accident signal of control unit for vehicle or safety air bag control unit; In response to described accident signal, detect described positive switch and whether described negative switch cannot disconnect.
According to an embodiment of the present invention, wherein said battery management unit is also for closed described positive switch and described negative switch; Measure the temperature of described battery pack; By measured temperature compared with predetermined temperature threshold; When measured temperature is less than described temperature threshold, closed described first switch; When measured temperature is equal to or greater than described temperature threshold, disconnect closed described first switch.
According to a third aspect of the invention we, provide a kind of Vehicular battery group management method, described method comprises: between the positive pole and vehicle load of described battery pack, in series arrange positive switch; Between the negative pole and described vehicle load of described battery pack, in series negative switch is set; First resistance and first switch of one series connection are set, and by the first resistance of described series connection and the first switch-linear hybrid for be electrically connected in parallel with described vehicle load; Closed described positive switch and described negative switch, and close or disconnect described first switch to control the temperature of described battery pack; And when vehicle has an accident, disconnect described positive switch and described negative switch, and closed described first switch is to discharge described vehicle load.
According to an embodiment of the present invention, wherein when to have an accident, disconnect described positive switch and described negative switch, and closed described first switch is to comprise described vehicle load electric discharge: when vehicle has an accident, receive the accident signal of control unit for vehicle or safety air bag control unit; And in response to described accident signal, disconnect described positive switch and described negative switch, and closed described first switch is to discharge described vehicle load.
According to an embodiment of the present invention, wherein closed described positive switch and described negative switch, and closed or disconnect described first switch and comprise with the temperature controlling described battery: closed described positive switch and described negative switch; Measure the temperature of described battery pack; By measured temperature compared with predetermined temperature threshold; When measured temperature is less than described temperature threshold, closed described first switch; When measured temperature is equal to or greater than described temperature threshold, disconnect closed described first switch.
According to an embodiment of the present invention, wherein said battery pack comprises multiple battery unit be in series electrically connected, and described method also comprises: the distance be set between each described battery unit by described first resistance is equal.
According to an embodiment of the present invention, wherein said battery pack is dispelled the heat by the air cooling system of described vehicle; And described method also comprises: the air intake place described first resistance being arranged on described air cooling system.
According to an embodiment of the present invention, wherein said first resistance is the first resistance that several are in series electrically connected, and described method also comprises: several first resistance described are evenly distributed in described battery pack.
According to an embodiment of the present invention, wherein said battery pack is dispelled the heat by the liquid cooling system of described vehicle; And described method also comprises: by several first resistance described near described battery pack.
According to an embodiment of the present invention, wherein said battery pack comprises multiple battery unit be in series electrically connected, and described method also comprises: each in several first resistance described be electrically connected in parallel with a second switch respectively; And wherein closed described positive switch and described negative switch also close or disconnect described first switch, and the temperature controlling described battery pack comprises: closed described positive switch and described negative switch, and closed described first switch; Respectively closed or disconnect in second switch described in several each, to control the temperature of each in described multiple battery unit respectively.
According to an embodiment of the present invention, described method also comprises: when described positive switch and described negative switch cannot disconnect, and closed described first switch, by the energy of battery pack described in described first resistance consumption.
According to an embodiment of the present invention, described method also comprises: outside described first resistance, arrange betal can.
According to an embodiment of the present invention, described method also comprises: described first resistance is set to prism-shaped, cylindric or sheet.
According to an embodiment of the present invention, described method also comprises: described first resistance is set to multiple pellet resistances in parallel.
According to an embodiment of the present invention, described method also comprises: be in series electrically connected with precharge switch by pre-charge resistance, and the pre-charge resistance of described series connection and described precharge switch is set to be electrically connected in parallel with described positive switch; And before closing described positive switch and described negative switch, described method also comprises: disconnect described first switch and described positive switch; Closed described precharge switch and described negative switch, being described vehicle load precharge by described battery pack; And after precharge completes, disconnect described precharge switch.
According to a forth aspect of the invention, provide a kind of Vehicular battery group management method, comprising: between the positive pole and vehicle load of described battery pack, in series positive switch is set; Between the negative pole and described vehicle load of described battery pack, in series negative switch is set; First resistance and first switch of one series connection are set, and by the first resistance of described series connection and the first switch-linear hybrid for be electrically connected in parallel with described vehicle load; Closed described positive switch and described negative switch, and close or disconnect described first switch to control the temperature of described battery pack; And detect described positive switch when vehicle has an accident and whether described negative switch cannot disconnect; When described positive switch being detected and described negative switch cannot disconnect, closed described first switch, by the energy of battery pack described in described first resistance consumption.
According to an embodiment of the present invention, wherein detect described positive switch and described negative switch whether cannot disconnect comprising when vehicle has an accident: when vehicle has an accident, receive the accident signal of control unit for vehicle or safety air bag control unit; In response to described accident signal, detect described positive switch and whether described negative switch cannot disconnect.
According to an embodiment of the present invention, wherein closed described positive switch and described negative switch, and closed or disconnect described first switch and comprise with the temperature controlling described battery pack: closed described positive switch and described negative switch; Measure the temperature of described battery pack; By measured temperature compared with predetermined temperature threshold; When measured temperature is less than described temperature threshold, closed described first switch; When measured temperature is equal to or greater than described temperature threshold, disconnect closed described first switch.
In a word, the Vehicular battery group management system that embodiments of the present invention provide and method, provide a kind of quick, reliable and safe scheme, can not only control the temperature of vehicle battery packs, battery can also be disconnected from vehicle load, and effectively by the electric residue electric discharge in vehicle load; Even if battery pack and vehicle load cannot disconnect, also vehicle load discharged by resistance, this scheme is effective and reliable; The heat around each region of battery pack can be controlled respectively, respectively temperature is adjusted to each battery unit, the speed that battery pack heats up can be controlled simultaneously as required, heat is evenly distributed, to make all battery unit heating, there is identical temperature; The a large amount of amount of localized heat produced when can work to battery circuit manage; Self can produce the resistance of heat as heater element after using energising, not need to be set to the extra power supply that heater element is powered, simplify the structure of battery circuit, reduce cost; Effectively can avoid the immediate current spike in battery circuit, extend the service life of each parts; In addition, the Vehicular battery group management system that embodiments of the present invention provide and method be both applicable to the vehicle using air cooling system, were also applicable to the vehicle using liquid cooling system.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to technological means of the present invention can be better understood, and can be implemented according to the content of specification sheets, and can become apparent, below especially exemplified by the specific embodiment of the present invention to allow above and other objects of the present invention, feature and advantage.
Accompanying drawing explanation
By reading hereafter detailed description of the preferred embodiment, various other advantage and benefit will become cheer and bright for those of ordinary skill in the art.Accompanying drawing only for illustrating the object of preferred implementation, and does not think limitation of the present invention.And in whole accompanying drawing, represent identical parts by identical reference symbol.In the accompanying drawings:
Fig. 1 be according to an embodiment of the present invention in for controlling the schematic diagram of the device of the temperature of battery pack;
Fig. 2 is the schematic diagram of multiple battery unit and several the first resistance in middle according to an embodiment of the present invention battery pack;
Fig. 3 is the diagram of curves of the voltage of vehicle load and the temperature traverse of battery pack when each switch closes or disconnects in system 100 according to an embodiment of the present invention;
Fig. 4 is the diagram of circuit of Vehicular battery group management method 200 according to an embodiment of the present invention; And
Fig. 5 is the diagram of circuit of Vehicular battery group management method 300 according to an embodiment of the present invention.
Detailed description of the invention
Below with reference to accompanying drawings illustrative embodiments of the present disclosure is described in more detail.Although show illustrative embodiments of the present disclosure in accompanying drawing, however should be appreciated that can realize the disclosure in a variety of manners and not should limit by the embodiment of setting forth here.On the contrary, provide these embodiments to be in order to more thoroughly the disclosure can be understood, and complete for the scope of the present disclosure can be conveyed to those skilled in the art.But achieve the present invention although should be appreciated that those skilled in the art can dream up clearly not describe in this manual or record and be included in the various structures in spirit of the present invention, principle and scope.The all examples quoted from this specification sheets and conditional language are all for the object illustrated and instruct, principle prior art contributed to help reader understanding contriver and concept, and should be understood to be not limited to these the specifically example of citation and conditions.In addition, in order to be illustrated more clearly in, the detailed description for known devices, circuit and method is eliminated, not obscure description of the invention.Should be understood that unless stated otherwise, the feature in each embodiment described herein can combine mutually.
The quantity of each parts cited by it will be understood by those skilled in the art that in exemplary embodiment of the present invention is only for illustrative purposes, and not should be understood to limitation of the present invention.In the present invention, each parts can have other quantity, and do not depart from scope of the present invention.
In this manual, the function of each unit can realize by using specialized hardware or the hardware performing process that can combine with suitable software.Such hardware or specialized hardware can comprise special IC (ASIC), various other circuit, various treaters etc.When being realized by treater, this function can be provided by single application specific processor, single share processor or multiple independently treater (wherein some may be shared).In addition, treater should not be understood to specially to refer to can the hardware of executive software, but impliedly can comprise and be not limited to digital signal processor (DSP) hardware, be used for the read-only memory (ROM) (ROM) of storing software, random access memory (RAM) and non-volatile memory apparatus.
Embodiment one
According to a first aspect of the invention, provide a kind of Vehicular battery group management system, described system comprises: positive switch, is arranged between the positive pole of described battery pack and described vehicle load, and described positive switch is in series electrically connected with described battery pack and described vehicle load; Negative switch, is arranged between the negative pole of described battery pack and described vehicle load, and described negative switch is in series electrically connected with described battery pack and described vehicle load; Described system also comprises: the first resistance and the first switch, and described first resistance and described first switch are in series electrically connected, and described first resistance of series connection and described first switch are electrically connected in parallel with described vehicle load; Battery management unit, for closed described positive switch and described negative switch, and closes or disconnects described first switch to control the temperature of described battery pack; And disconnect described positive switch and described negative switch when vehicle has an accident, and closed described first switch is to discharge described vehicle load.
According to the embodiment of the present invention, battery pack, as lithium cell group, is other parts of the high-pressure system to vehicle, as inverter or motor, and the power supply of power supply.
Fig. 1 shows a non-limiting and exemplary embodiment of the present invention.To should be appreciated that in Fig. 1 that the annexation of represented each unit is only example, those skilled in the art can adopt other annexation completely, as long as each unit also can realize function of the present invention under such annexation.
As shown in Figure 1, Vehicular battery group management system 100 according to an illustrative embodiment of the invention comprises positive switch 120 and negative switch 130.Between the positive pole that positive switch 120 is arranged on described battery pack 110 and described vehicle load 101, described positive switch 120 is in series electrically connected with described battery pack 110 and described vehicle load 101.Between the negative pole that negative switch 130 is arranged on described battery pack 110 and described vehicle load 101, described negative switch 130 is in series electrically connected with described battery pack 110 and described vehicle load 101.System 100 also comprises the first resistance 140 and the first switch 150, and described first resistance 140 and described first switch 150 are in series electrically connected, and described first resistance 140 of series connection and described first switch 150 are electrically connected in parallel with described vehicle load 101.System 100 also comprises battery management unit 160, for closed described positive switch 120 and described negative switch 130, powers to make battery pack 110 pairs of vehicle load 101; Battery management unit 160 makes the first resistance 140 be energized or power-off for closing or disconnecting described first switch 150.When closed first switch 150, the first resistance 140 is energized and produces heat thus heating battery group 110; When disconnection the first switch 150, there is no electric current in the first resistance 140, no longer produce heat, thus maintain the temperature of battery pack or the temperature of battery pack is reduced gradually through heat radiation.When vehicle has an accident, battery management unit 160 is for disconnecting described positive switch 120 and described negative switch 130, to make power-off between battery pack 110 and vehicle load 101, and closed described first switch 150, now the first resistance 140 is connected in series with vehicle load 101, described vehicle load 101 is discharged by the first resistance 140.
According to an illustrative embodiment of the invention, described battery management unit 160 is also for closed described positive switch and described negative switch; Measure the temperature of described battery pack; By measured temperature compared with predetermined temperature threshold; When measured temperature is less than described temperature threshold, closed described first switch; When measured temperature is equal to or greater than described temperature threshold, disconnect closed described first switch.As shown in Figure 1, battery management unit 160 closes positive switch 120 and negative switch 130 is in power supply state to make battery pack 110; Measure the temperature T of battery pack 110; By the temperature T of described battery pack and predetermined temperature threshold T
0compare, alternatively, predetermined temperature threshold T
0can be battery pack work efficiency the highest time temperature.Alternatively, described in the temperature T of battery pack that detects can be the temperature directly recorded by a temperature sensor, also can be the aviation value of the temperature that one group of temperature sensor detects or the battery pack temperature that draws according to other algorithms.When measured temperature T is less than temperature threshold T
0, closed first switch 150 of battery management unit 160, then the first resistance 140 is electrically connected with battery pack 110 by the first switch 150 in parallel, produces heat after the first resistance 140 is energized, thus heating battery group 110.When measured temperature T is equal to or greater than temperature threshold T
0, battery management unit 160 disconnects the first closed switch 150, then do not have electric current in the first resistance 140, no longer produce heat, thus the temperature T of battery pack 110 is maintained temperature threshold T
0or make the temperature T of battery pack be reduced to temperature threshold T gradually through heat radiation
0.This mode self can produce the resistance of heat as heater element after using energising, does not need to be set to the extra power supply that heater element is powered, simplifies the structure of battery circuit, reduce cost.
According to an illustrative embodiment of the invention, described battery pack comprises multiple battery unit be in series electrically connected, and distance between each described battery unit with described first resistance is equal.Alternatively, battery pack can comprise multiple battery unit, and these battery units with various combined serial and/or can be connected in parallel, to provide required voltage and energy.Such as, battery pack can comprise multiple battery unit be connected in series, the battery that each battery unit also can comprise multiple series connection and/or be connected in parallel.In order to pack, install, the object such as safety management and control, these battery units can be set to independently module.Such as, one is had to the battery pack of the battery that 96 are connected in series, battery pack can be set to 12 battery modules be connected in series, each module comprises 8 battery units be connected in series.The quantity of each parts cited by it will be understood by those skilled in the art that in exemplary embodiment of the present invention is only for illustrative purposes, and not should be understood to limitation of the present invention.
In the present invention, each parts can have other quantity, and do not depart from scope of the present invention.Alternatively, multiple battery unit can be evenly distributed on the first resistance 140 for the center of circle circumferentially.Alternatively, multiple battery unit can be evenly distributed on on the first resistance 140 sphere that is the centre of sphere.This mode makes the first resistance heat equably each battery unit in battery pack.
According to an illustrative embodiment of the invention, described battery pack 110 is dispelled the heat by the air cooling system of described vehicle, and described first resistance 140 is arranged on the air intake place of described air cooling system.Air in the air cooling system use operator's compartment of vehicle, as the source of heating or cool, heats battery pack 110 or dispels the heat.By the first resistance 140 being arranged on the air intake place of described air cooling system, make air in operator's compartment through air intake place, the first resistance 140 being arranged on the air intake of described air cooling system heats, air after heating arrives fast and surrounds battery pack 110, heats battery pack 110.This mode, can be delivered to battery pack sooner, more uniformly by heat, and adds the area of contact that battery pack participates in heat trnasfer, thus battery pack is heated up quickly.
According to an illustrative embodiment of the invention, described first resistance is the first resistance that several are in series electrically connected, and several first resistance described are evenly distributed in described battery pack more uniformly can control the temperature of battery pack.In a preferred embodiment, described battery pack comprises multiple battery unit be in series electrically connected, and described first resistance is the first resistance that several are in series electrically connected, and several first resistance described are evenly distributed in around multiple described battery unit.Alternatively, the quantity of battery unit can equal the quantity of the first resistance, also can be not equal to the quantity of the first resistance.Alternatively, as shown in Figure 2, battery pack 110 can comprise multiple, as 9 battery unit 111-119 be in series electrically connected, first resistance 140 is several, as four the first resistance 141-144 be in series electrically connected, these four the first resistance 141-144 can be configured to be evenly distributed in battery pack, namely around battery unit 111-119.Alternatively, this battery pack can have the battery unit of other quantity.Alternatively, the first resistance also can be the first resistance of other quantity.Fig. 2 shows the schematic diagram according to battery unit multiple in battery pack in exemplary embodiment of the present invention and several the first resistance.As shown in Figure 2, when the battery unit 111-119 in battery pack along a straight line successively equidistantly time, first resistance 141 can be arranged on battery unit 112 place, first resistance 142 is arranged on battery unit 114 place, first resistance 143 is arranged on battery unit 116 place, first resistance 144 is arranged on battery unit 118 place, to make each several part homogeneous heating of battery pack.Alternatively, four the first resistance 141-144 can be set to a module, 9 battery unit 111-119 are evenly distributed on this module for the center of circle circumferentially.Alternatively, four the first resistance 141-144 can be set to a module, 9 battery unit 111-119 be evenly distributed on on this module sphere that is the centre of sphere.Alternatively, 9 battery unit 111-119 can be set to a module, four the first resistance 141-144 are evenly distributed on this module for the center of circle circumferentially.Alternatively, the first resistance can be arranged near battery pack, also can be set to distance battery pack one segment distance.
According to an illustrative embodiment of the invention, described battery pack is dispelled the heat by the liquid cooling system of described vehicle, and several first resistance described are near described battery pack.In a preferred embodiment, described battery pack comprises multiple battery unit be in series electrically connected, described multiple battery unit is dispelled the heat by the liquid cooling system of described vehicle, and several first resistance described are near described multiple battery unit, to make heat can be directly delivered to battery pack from the first resistance, thus by each several part homogeneous heating of battery pack.As shown in Figure 2, the battery pack of system 100 comprises 9 battery unit 111-119, and 4 the first resistance 141-144 are evenly distributed in around battery unit 111-119.When battery pack is dispelled the heat by the liquid cooling system of described vehicle, first resistance 141 is set near battery unit 112, first resistance 142 is arranged on battery unit 114, first resistance 143 is set near battery unit 116, first resistance 144 is set near battery unit 118, to make heat can be directly delivered to battery pack from the first resistance, thus by each several part homogeneous heating of battery pack.Alternatively, four the first resistance 141-144 can be set to a module, 9 battery unit 111-119 are uniformly distributed near this module.Alternatively, 9 battery unit 111-119 can be set to a module, four the first resistance 141-144 are uniformly distributed near this module.
According to an illustrative embodiment of the invention, described battery pack comprises multiple battery unit be in series electrically connected, system 100 also comprises: several second switches, and each of several second switches described is electrically connected in parallel with each in several first resistance described respectively; And described battery management unit is also for closed described positive switch and described negative switch, and closed described first switch; Respectively closed or disconnect in second switch described in several each, to control the temperature of each in described multiple battery unit respectively.
As shown in Figure 2, described battery pack 110 comprises a Battery pack unit of series connection, such as, comprise a Battery pack unit of 9 battery unit 111-119 of series connection, and several first resistance of series connection, such as 4 the first resistance 141-144.System 100 also comprises several second switches, such as 4 second switch 161-164, each second switch respectively with first resistor coupled in parallel be electrically connected, such as second switch 161 is electrically connected in parallel with the first resistance 141, second switch 162 is electrically connected in parallel with the first resistance 142, second switch 163 is electrically connected in parallel with the first resistance 143, and second switch 164 is electrically connected in parallel with the first resistance 144.Battery management unit 160, also for closed positive switch 120 and negative switch 130, to make battery pack power to vehicle load, and closed first switch 150, is energized to make the first resistance 141-144 of series connection with it; Respectively closed or disconnect in second switch 161-164 described in several each, make the first resistance 141-144 short circuit in parallel with it respectively or normally work, to control the temperature of each in described multiple battery unit respectively.Such as, closed positive switch 120 and negative switch 130, and after closed first switch 150, battery management unit 160 can closed second switch 162, makes first resistance 142 short circuit in parallel with it and does not produce heat; Disconnect second switch 161,163 and 164 simultaneously, make first resistance 141,143 and 144 in parallel with it normally work and produce heat, thus heat the multiple battery units be arranged near the first resistance 141,143 and 144.Alternatively, battery management unit 160 can close multiple second switch simultaneously, disconnects other second switches.Alternatively, battery management unit 160 can close multiple second switch successively in multiple time gap, only closes a second switch, disconnect other second switches in each time gap.
According to an illustrative embodiment of the invention, described battery management unit 160 communicates to connect with control unit for vehicle or safety air bag control unit; And described battery management unit 160 also for: when vehicle has an accident, receive the accident signal that control unit for vehicle or safety air bag control unit send; And in response to described accident signal, disconnect described positive switch 120 and described negative switch 130, to make power-off between battery pack 110 and vehicle load 101, and closed described first switch 150, now the first resistance 140 is connected in series with vehicle load 101, described vehicle load 101 is discharged by the first resistance 140.
According to an illustrative embodiment of the invention, wherein said battery management unit 160 also for: when described positive switch 120 and described negative switch 130 cannot disconnect, closed described first switch 150, is consumed the energy of described battery pack by described first resistance 140.When positive switch 120 and negative switch 130 lost efficacy, cannot disconnect time, battery management unit 160 closes described first switch 150, and the first resistance 140 is electrically connected with battery pack 110 and vehicle load 101, by the energy of the first resistance 140 consuming cells group 110.Whether detection positive switch 120 and negative switch 130 cannot disconnect and can use any mode of the prior art, such as, realize by detecting battery pack temperature or testing circuit electric current etc.
According to an illustrative embodiment of the invention, system 100 also comprises the betal can be arranged on outside described first resistance 140, with heat release more quickly and efficiently.
According to an illustrative embodiment of the invention, described first resistance 140 is set to prism-shaped, cylindric or sheet.
According to an illustrative embodiment of the invention, described first resistance 140 is set to multiple pellet resistances in parallel, to produce exothermal effect better.In a preferred embodiment, multiple pellet resistances of described parallel connection are connected with a switch respectively, thus control the electrical connection of each pellet resistance respectively, thus realize exothermal effect in various degree.
According to an illustrative embodiment of the invention, system 100 also comprises: pre-charge resistance and precharge switch, described pre-charge resistance is in series electrically connected with described precharge switch, and the pre-charge resistance of described series connection and described precharge switch are set to be electrically connected in parallel with described positive switch; And before closed described positive switch and described negative switch, described battery management unit also for: disconnect described first switch and described positive switch; Closed described precharge switch and described negative switch, being described vehicle load precharge by described battery pack; And after precharge completes, disconnect described precharge switch.As shown in Figure 1, system 100 also comprises pre-charge resistance 170 and precharge switch 180, described pre-charge resistance 170 is in series electrically connected with described precharge switch 180, and the pre-charge resistance 170 of described series connection and described precharge switch 180 are set to be electrically connected in parallel with described positive switch 120.If positive switch 120, negative switch 130 and the first switch 150 all disconnect, in whole battery circuit, there is no electric current.If for battery pack being returned to the supply regular power state to vehicle load, if closing positive switch 120 and negative switch 130 simultaneously, an immediate current spike can be produced in circuit, having a strong impact on the service life of each element in battery circuit.Therefore, before closed positive switch 120 and negative switch 130, battery management unit 160 first disconnects described first switch 150 and described positive switch 120, and now circuit is in off-position; Then, battery management unit 160 closes precharge switch 180 and negative switch 130, now, pre-charge resistance 170 is connected in series with battery pack 110 and load 101, a part of load is served as by pre-charge resistance 170, thus avoid immediate current spike, extend the service life of each element in battery circuit.
The diagram of curves of the voltage of vehicle load and the temperature traverse of battery pack when Fig. 3 shows that in system 100 according to the embodiment of the present invention, each switch closes or disconnects.
As shown in Figure 3, at time gap t
1in, battery management unit 160 disconnects positive switch 120, negative switch 130, first switch 150 and precharge switch 180.Now, battery pack 110 is not powered to vehicle load, does not have electric current, not heating battery group in the first resistance 140, and the voltage of vehicle load is 0, and the temperature T of battery pack equals ambient temperature and lower than temperature threshold T
0.
At time gap t
2in, cause producing immediate current spike in circuit in order to avoid closed positive switch 120 simultaneously and negative switch 130, battery management unit 160 makes the first switch 150 and positive switch 120 still remain open, and now circuit is in off-position; Then, battery management unit 160 closes precharge switch 180 and negative switch 130, now, pre-charge resistance 170 is connected in series with battery pack 110 and vehicle load 101, pre-charge resistance 170 serves as a part of load, powered to vehicle load 101 by battery pack 110, the voltage V of vehicle load slowly rises, thus avoids immediate current spike.When the voltage V of vehicle load reaches normal working voltage V
0time, closed positive switch 120, disconnect precharge switch 180, now no current in pre-charge resistance 170 subsequently, battery pack 110 is in the supply regular power state to vehicle load 101.At time gap t
2in, the first switch 150 remains open always, does not have electric current, not heating battery group in the first resistance 140, and the temperature T of battery pack still equals ambient temperature and lower than temperature threshold T
0.
At time gap t
3in, battery management unit 160 makes positive switch 120 and negative switch 130 remain closed, and battery pack 110 is in the supply regular power state to vehicle load 101; Precharge switch 180 remains open, now no current in pre-charge resistance 170; The voltage V of vehicle load remains on normal working voltage V
0.At time gap t
3in, the first switch 150 remains open always, does not have electric current, not heating battery group in the first resistance 140, and the temperature T of battery pack still equals ambient temperature and lower than temperature threshold T
0.
At time gap t
4in, battery management unit 160 makes positive switch 120 and negative switch 130 remain closed, and battery pack 110 is in the supply regular power state to vehicle load 101; Precharge switch 180 remains open, now no current in pre-charge resistance 170; The voltage V of vehicle load remains on normal working voltage V
0.When battery management unit 160 detects that the temperature T of battery pack is less than temperature threshold T
0, there is electric current in closed first switch 150, first resistance 140 and produce heat, and heating battery group 110, the temperature T of battery pack is increased to temperature threshold T
0.
At time gap t
5in, battery management unit 160 makes positive switch 120 and negative switch 130 remain closed, and battery pack 110 is in the supply regular power state to vehicle load 101; Precharge switch 180 remains open, now no current in pre-charge resistance 170; The voltage V of vehicle load remains on normal working voltage V
0.When battery management unit 160 detects that the temperature T of battery pack is equal to or greater than temperature threshold T
0, disconnect in the first switch 150, first resistance 140 and do not have electric current and no longer produce heat, the temperature T of battery pack remains on temperature threshold T
0or be reduced to temperature threshold T gradually through heat radiation
0.
At time gap t
6in, such as, when vehicle has an accident, battery management unit 160 disconnects described positive switch 120 and described negative switch 130, to make power-off between battery pack 110 and vehicle load 101, and closed described first switch 150, now the first resistance 140 is connected in series with vehicle load 101, described vehicle load 101 is discharged, make the voltage of vehicle load 101 be reduced to 0 fast by the first resistance 140.Now, the first resistance 140 has electric current and produces heat, and of short duration heating battery group 110, and because discharge time is very short, therefore the temperature T of battery pack rises and not obvious.
After electric discharge completely, at time gap t
7in, battery management unit 160 disconnects positive switch 120, negative switch 130, first switch 150 and precharge switch 180.Now, battery pack 110 is not powered to vehicle load, and do not have electric current, not heating battery group in the first resistance 140, the voltage of vehicle load is 0, and the temperature T of battery pack drops to ambient temperature gradually.
In a word, the Vehicular battery group management system that embodiments of the present invention provide, provides a kind of quick, reliable and safe scheme, can not only control the temperature of vehicle battery packs, battery can also be disconnected from vehicle load, and effectively by the electric residue electric discharge in vehicle load; Even if battery pack and vehicle load cannot disconnect, also vehicle load discharged by resistance, this scheme is effective and reliable; The heat around each region of battery pack can be controlled respectively, respectively temperature is adjusted to each battery unit, the speed that battery pack heats up can be controlled simultaneously as required, heat is evenly distributed, to make all battery unit heating, there is identical temperature; The a large amount of amount of localized heat produced when can work to battery circuit manage; Self can produce the resistance of heat as heater element after using energising, not need to be set to the extra power supply that heater element is powered, simplify the structure of battery circuit, reduce cost; Effectively can avoid the immediate current spike in battery circuit, extend the service life of each parts; In addition, the Vehicular battery group management system that embodiments of the present invention provide and method be both applicable to the vehicle using air cooling system, were also applicable to the vehicle using liquid cooling system.
Embodiment two
According to a second aspect of the invention, provide a kind of Vehicular battery group management system, comprising: positive switch, be arranged between the positive pole of described battery pack and described vehicle load, described positive switch is in series electrically connected with described battery and described vehicle load; Negative switch, is arranged between the negative pole of described battery pack and described vehicle load, and described negative switch is in series electrically connected with described battery pack and described vehicle load; Described system also comprises: the first resistance and the first switch, and described first resistance and described first switch are in series electrically connected, and described first resistance of series connection and described first switch are electrically connected in parallel with described vehicle load; Battery management unit, for closed described positive switch and described negative switch, and closes or disconnects described first switch to control the temperature of described battery pack; Described positive switch is detected and whether described negative switch cannot disconnect when vehicle has an accident; And when described positive switch being detected and described negative switch cannot disconnect, closed described first switch, by the energy of battery pack described in described first resistance consumption.
According to the embodiment of the present invention, battery pack, as lithium cell group, is other parts of the high-pressure system to vehicle, as inverter or motor, and the power supply of power supply.
As shown in Figure 1, Vehicular battery group management system 100 according to an illustrative embodiment of the invention comprises positive switch 120 and negative switch 130.Between the positive pole that positive switch 120 is arranged on described battery pack 110 and described vehicle load 101, described positive switch 120 is in series electrically connected with described battery pack 110 and described vehicle load 101.Between the negative pole that negative switch 130 is arranged on described battery pack 110 and described vehicle load 101, described negative switch 130 is in series electrically connected with described battery pack 110 and described vehicle load 101.System 100 also comprises the first resistance 140 and the first switch 150, and described first resistance 140 and described first switch 150 are in series electrically connected, and described first resistance 140 of series connection and described first switch 150 are electrically connected in parallel with described vehicle load 101.System 100 also comprises battery management unit 160, for closed described positive switch 120 and described negative switch 130, powers to make battery pack 110 pairs of vehicle load 101; Battery management unit 160 makes the first resistance 140 be energized or power-off for closing or disconnecting described first switch 150.When closed first switch 150, the first resistance 140 is energized and produces heat thus heating battery group 110; When disconnection the first switch 150, there is no electric current in the first resistance 140, no longer produce heat, thus maintain the temperature of battery pack or the temperature of battery pack is reduced gradually through heat radiation.When vehicle has an accident, described battery management unit 160 also for: detect described positive switch 120 when vehicle has an accident and whether described negative switch 130 disconnects; When detecting that positive switch 120 and negative switch 130 lost efficacy, when cannot disconnect, battery management unit 160 closes described first switch 150, first resistance 140 is electrically connected, by the energy of the first resistance 140 consuming cells group 110 with battery pack 110 and vehicle load 101.
According to the embodiment of the present invention, described battery management unit 160 also for: when vehicle has an accident, receive the accident signal of control unit for vehicle or safety air bag control unit; In response to described accident signal, detect described positive switch 120 and whether described negative switch 130 cannot disconnect.Alternatively, battery management unit 160 communicates to connect with control unit for vehicle or safety air bag control unit.
According to the embodiment of the present invention, described battery management unit is also for closed described positive switch and described negative switch; Measure the temperature of described battery pack; By measured temperature compared with predetermined temperature threshold; When measured temperature is less than described temperature threshold, closed described first switch; When measured temperature is equal to or greater than described temperature threshold, disconnect closed described first switch.As shown in Figure 1, battery management unit 160 closes positive switch 120 and negative switch 130 is in power supply state to make battery pack 110; Measure the temperature T of battery pack 110; By the temperature T of described battery pack and predetermined temperature threshold T
0compare, alternatively, predetermined temperature threshold T
0can be battery pack work efficiency the highest time temperature.When measured temperature T is less than temperature threshold T
0, closed first switch 150 of battery management unit 160, then the first resistance 140 is electrically connected with battery pack 110 by the first switch 150 in parallel, produces heat after the first resistance 140 is energized, thus heating battery group 110.When measured temperature T is equal to or greater than temperature threshold T
0, battery management unit 160 disconnects the first closed switch 150, then do not have electric current in the first resistance 140, no longer produce heat, thus the temperature T of battery pack 110 is maintained temperature threshold T
0or make the temperature T of battery pack be reduced to temperature threshold T gradually through heat radiation
0.This mode self can produce the resistance of heat as heater element after using energising, does not need to be set to the extra power supply that heater element is powered, simplifies the structure of battery circuit, reduce cost.
Also can be applicable to, according to the Vehicular battery group management system in embodiments of the invention two, in order to concise and to the point object, not repeat them here to the foregoing description of the Vehicular battery group management system in embodiment one.
In a word, the Vehicular battery group management system that embodiments of the present invention provide, provides a kind of quick, reliable and safe scheme, can not only control the temperature of vehicle battery packs, battery can also be disconnected from vehicle load, and effectively by the electric residue electric discharge in vehicle load; Even if battery pack and vehicle load cannot disconnect, also vehicle load discharged by resistance, this scheme is effective and reliable; Self can produce the resistance of heat as heater element after using energising, not need to be set to the extra power supply that heater element is powered, simplify the structure of battery circuit, reduce cost.
Embodiment three
According to a third aspect of the invention we, corresponding to the vehicle according to the invention batteries management system as described in embodiment one, provide a kind of Vehicular battery group management method 200.
Fig. 4 shows the diagram of circuit of the Vehicular battery group management method 200 according to exemplary embodiment of the invention.
As shown in Figure 4, method 200 comprises: step S210: between the positive pole and vehicle load of described battery pack, in series arrange positive switch; Step S220: between the negative pole and described vehicle load of described battery pack, in series negative switch is set; Step S230: the first resistance and the first switch that a series connection is set, and by the first resistance of described series connection and the first switch-linear hybrid for be electrically connected in parallel with described vehicle load; Step S240: closed described positive switch and described negative switch, and close or disconnect described first switch to control the temperature of described battery pack; And when vehicle has an accident, disconnect described positive switch and described negative switch, and closed described first switch is to discharge described vehicle load.
According to an illustrative embodiment of the invention, wherein in step S240 when to have an accident, disconnect described positive switch and described negative switch, and closed described first switch is can comprise described vehicle load electric discharge: when vehicle has an accident, receive the accident signal of control unit for vehicle or safety air bag control unit; And in response to described accident signal, disconnect described positive switch and described negative switch, and closed described first switch is to discharge described vehicle load.
According to an illustrative embodiment of the invention, wherein closed described positive switch and described negative switch in step S240, and closed or disconnect described first switch and can comprise with the temperature controlling described battery: closed described positive switch and described negative switch; Measure the temperature of described battery pack; By measured temperature compared with predetermined temperature threshold; When measured temperature is less than described temperature threshold, closed described first switch; When measured temperature is equal to or greater than described temperature threshold, disconnect closed described first switch.
According to an illustrative embodiment of the invention, wherein said battery pack comprises multiple battery unit be in series electrically connected, and described method 200 also comprises: the distance be set between each described battery unit by described first resistance is equal.
According to an illustrative embodiment of the invention, wherein said battery pack is dispelled the heat by the air cooling system of described vehicle; And described method 200 also comprises: the air intake place described first resistance being arranged on described air cooling system.
According to an illustrative embodiment of the invention, wherein said first resistance is the first resistance that several are in series electrically connected, and described method 200 also comprises: several first resistance described are evenly distributed in described battery pack.
According to an illustrative embodiment of the invention, wherein said battery pack is dispelled the heat by the liquid cooling system of described vehicle; And described method 200 also comprises: by several first resistance described near described battery pack.
According to an illustrative embodiment of the invention, wherein, described battery pack comprises the battery unit of multiple series connection, and described method 200 also comprises: each in several first resistance described be electrically connected in parallel with a second switch respectively; And wherein closed described positive switch and described negative switch also close or disconnect described first switch, and the step S240 controlling the temperature of described battery pack comprises: closed described positive switch and described negative switch, and closed described first switch; Respectively closed or disconnect in second switch described in several each, to control the temperature of each in described multiple battery unit respectively.
According to an illustrative embodiment of the invention, described method 200 also comprises: when described positive switch and described negative switch cannot disconnect, and closed described first switch, by the energy of battery pack described in described first resistance consumption.
According to an illustrative embodiment of the invention, described method 200 also comprises: outside described first resistance, arrange betal can.
According to an illustrative embodiment of the invention, described method 200 also comprises: described first resistance is set to prism-shaped, cylindric or sheet.
According to an illustrative embodiment of the invention, described method 200 also comprises: described first resistance is set to multiple pellet resistances in parallel.
According to an illustrative embodiment of the invention, described method 200 also comprises: be in series electrically connected with precharge switch by pre-charge resistance, and the pre-charge resistance of described series connection and described precharge switch is set to be electrically connected in parallel with described positive switch; And before closing described positive switch and described negative switch in step 240, described method 200 also comprises: disconnect described first switch and described positive switch; Closed described precharge switch and described negative switch, being described vehicle load precharge by described battery pack; And after precharge completes, disconnect described precharge switch.
The method 200 of vehicle according to the invention battery set management also be can be applicable to the foregoing description of Vehicular battery group management system 100 in embodiment one, in order to concise and to the point object, do not repeat them here.
In a word, the Vehicular battery group management method that embodiments of the present invention provide, provides a kind of quick, reliable and safe scheme, can not only control the temperature of vehicle battery packs, battery can also be disconnected from vehicle load, and effectively by the electric residue electric discharge in vehicle load; Even if battery pack and vehicle load cannot disconnect, also vehicle load discharged by resistance, this scheme is effective and reliable; The heat around each region of battery pack can be controlled respectively, respectively temperature is adjusted to each battery unit, the speed that battery pack heats up can be controlled simultaneously as required, heat is evenly distributed, to make all battery unit heating, there is identical temperature; The a large amount of amount of localized heat produced when can work to battery circuit manage; Self can produce the resistance of heat as heater element after using energising, not need to be set to the extra power supply that heater element is powered, simplify the structure of battery circuit, reduce cost; Effectively can avoid the immediate current spike in battery circuit, extend the service life of each parts; In addition, the Vehicular battery group management system that embodiments of the present invention provide and method be both applicable to the vehicle using air cooling system, were also applicable to the vehicle using liquid cooling system.
Embodiment four
According to a forth aspect of the invention, corresponding to the vehicle according to the invention batteries management system as described in embodiment two, provide a kind of Vehicular battery group management method 300.
Fig. 5 shows the diagram of circuit of the Vehicular battery group management method 300 according to exemplary embodiment of the invention.
As shown in Figure 5, method 300 comprises: step S310: between the positive pole and vehicle load of described battery pack, in series arrange positive switch; Step S320: between the negative pole and described vehicle load of described battery pack, in series negative switch is set; Step S330: the first resistance and the first switch that a series connection is set, and by the first resistance of described series connection and the first switch-linear hybrid for be electrically connected in parallel with described vehicle load; Step S340: closed described positive switch and described negative switch, and close or disconnect described first switch to control the temperature of described battery pack; And detect described positive switch when vehicle has an accident and whether described negative switch cannot disconnect; When described positive switch being detected and described negative switch cannot disconnect, closed described first switch, by the energy of battery pack described in described first resistance consumption.
According to an illustrative embodiment of the invention, wherein detect described positive switch and described negative switch in step S340 whether cannot disconnect comprising when vehicle has an accident: when vehicle has an accident, receive the accident signal of control unit for vehicle or safety air bag control unit; According to described accident signal, detect described positive switch and whether described negative switch cannot disconnect.
According to an illustrative embodiment of the invention, wherein closed described positive switch and described negative switch in step S340, and closed or disconnect described first switch and comprise with the temperature controlling described battery pack: closed described positive switch and described negative switch; Measure the temperature of described battery pack; By measured temperature compared with predetermined temperature threshold; When measured temperature is less than described temperature threshold, closed described first switch; When measured temperature is equal to or greater than described temperature threshold, disconnect closed described first switch.
The method 300 of vehicle according to the invention battery set management also be can be applicable to the foregoing description of Vehicular battery group management system 100 in embodiment two, in order to concise and to the point object, do not repeat them here.
In a word, the Vehicular battery group management system 300 that embodiments of the present invention provide, provides a kind of quick, reliable and safe scheme, can not only control the temperature of vehicle battery packs, battery can also be disconnected from vehicle load, and effectively by the electric residue electric discharge in vehicle load; Even if battery pack and vehicle load cannot disconnect, also vehicle load discharged by resistance, this scheme is effective and reliable; Self can produce the resistance of heat as heater element after using energising, not need to be set to the extra power supply that heater element is powered, simplify the structure of battery circuit, reduce cost.
In this manual, a large amount of details is described.But, should be appreciated that embodiments of the present invention can be implemented when not having these details.In some embodiments, be not shown specifically known method, structure and technology, not make reader obscure the understanding of the principle to this specification sheets.
It will be understood by those skilled in the art that and can the module in the device in each embodiment adaptively be changed, and they are arranged in one or more devices different from this embodiment.Except the situation that feature or process are mutually repelled, any combination can be adopted, to method any disclosed in this specification sheets in steps or all modules of any device combine.Unless expressly stated otherwise, each feature disclosed in this specification sheets can by providing identical, equivalent or similar object alternative features replaces.
The present invention will be described instead of limit the invention to it should be noted that above-mentioned embodiment, and those skilled in the art are not when departing from the scope of claims, can design various alternate embodiments.In detail in the claims, the sequence of feature does not also mean that any particular order of feature, and especially, in claim to a method each step order and do not mean that these steps must perform according to this order.On the contrary, these steps can perform with any order suitably.In detail in the claims, any reference marker being positioned at bracket should be understood as limitations on claims.Term " comprises " or " comprising " is not got rid of existence and do not arrange module in the claims or step.The term "a" or "an" be positioned at before module or step is not got rid of and be there is multiple such module or step.The use of term " first ", " second " and " the 3rd " etc. does not represent any order, can be title by these terminological interpretations.
Claims (32)
1. a Vehicular battery group management system, is characterized in that, described system comprises:
Positive switch, is arranged between the positive pole of described battery pack and described vehicle load, and described positive switch is in series electrically connected with described battery pack and described vehicle load;
Negative switch, is arranged between the negative pole of described battery pack and described vehicle load, and described negative switch is in series electrically connected with described battery pack and described vehicle load;
First resistance and the first switch, described first resistance and described first switch are in series electrically connected, and described first resistance of series connection and described first switch are electrically connected in parallel with described vehicle load;
Battery management unit, for closed described positive switch and described negative switch, and closes or disconnects described first switch to control the temperature of described battery pack; And disconnect described positive switch and described negative switch when vehicle has an accident, and closed described first switch is to discharge described vehicle load.
2. the system as claimed in claim 1, wherein said battery management unit and control unit for vehicle or safety air bag control unit communicate to connect; And described battery management unit also for:
When vehicle has an accident, the accident signal that reception control unit for vehicle or safety air bag control unit send; And
In response to described accident signal, disconnect described positive switch and described negative switch, and closed described first switch is to discharge described vehicle load.
3. the system as claimed in claim 1, wherein said battery management unit also for:
Closed described positive switch and described negative switch;
Measure the temperature of described battery pack;
By measured temperature compared with predetermined temperature threshold;
When measured temperature is less than described temperature threshold, closed described first switch; When measured temperature is equal to or greater than described temperature threshold, disconnect closed described first switch.
4. the system as claimed in claim 1, wherein said battery pack comprises multiple battery unit be in series electrically connected, and distance between each described battery unit with described first resistance is equal.
5. the system as claimed in claim 1, wherein said battery pack is dispelled the heat by the air cooling system of described vehicle, and described first resistance is arranged on the air intake place of described air cooling system.
6. the system as claimed in claim 1, wherein said first resistance is the first resistance that several are in series electrically connected, and several first resistance described are evenly distributed in described battery pack.
7. system as claimed in claim 6, wherein said battery pack is dispelled the heat by the liquid cooling system of described vehicle, and several first resistance described are near described battery pack.
8. system as claimed in claims 6 or 7, wherein, described battery pack comprises multiple battery unit be in series electrically connected, and described system also comprises:
Several second switches, each of several second switches described is electrically connected in parallel with each in several first resistance described respectively; And
Described battery management unit also for:
Closed described positive switch and described negative switch, and closed described first switch;
Respectively closed or disconnect in second switch described in several each, to control the temperature of each in described multiple battery unit respectively.
9. the system as claimed in claim 1, wherein said battery management unit also for:
When described positive switch and described negative switch cannot disconnect, closed described first switch, by the energy of battery pack described in described first resistance consumption.
10. the system as claimed in claim 1, also comprises the betal can be arranged on outside described first resistance.
11. the system as claimed in claim 1, wherein said first resistance is set to prism-shaped, cylindric or sheet.
12. the system as claimed in claim 1, wherein said first resistance is set to multiple pellet resistances in parallel.
13. the system as claimed in claim 1, also comprise:
Pre-charge resistance and precharge switch, described pre-charge resistance is in series electrically connected with described precharge switch, and the pre-charge resistance of described series connection and described precharge switch are set to be electrically connected in parallel with described positive switch; And
Before closed described positive switch and described negative switch, described battery management unit also for:
Disconnect described first switch and described positive switch;
Closed described precharge switch and described negative switch, being described vehicle load precharge by described battery pack; And
Described precharge switch is disconnected after precharge completes.
14. 1 kinds of Vehicular battery group management systems, comprising:
Positive switch, is arranged between the positive pole of described battery pack and described vehicle load, and described positive switch is in series electrically connected with described battery and described vehicle load;
Negative switch, is arranged between the negative pole of described battery pack and described vehicle load, and described negative switch is in series electrically connected with described battery pack and described vehicle load;
It is characterized in that, described system also comprises:
First resistance and the first switch, described first resistance and described first switch are in series electrically connected, and described first resistance of series connection and described first switch are electrically connected in parallel with described vehicle load;
Battery management unit, for closed described positive switch and described negative switch, and closes or disconnects described first switch to control the temperature of described battery pack; Described positive switch is detected and whether described negative switch cannot disconnect when vehicle has an accident; And when described positive switch being detected and described negative switch cannot disconnect, closed described first switch, by the energy of battery pack described in described first resistance consumption.
15. systems as claimed in claim 14, wherein said battery management unit also for:
When vehicle has an accident, receive the accident signal of control unit for vehicle or safety air bag control unit;
In response to described accident signal, detect described positive switch and whether described negative switch cannot disconnect.
16. systems as claimed in claim 14, wherein said battery management unit also for:
Closed described positive switch and described negative switch;
Measure the temperature of described battery pack;
By measured temperature compared with predetermined temperature threshold;
When measured temperature is less than described temperature threshold, closed described first switch;
When measured temperature is equal to or greater than described temperature threshold, disconnect closed described first switch.
17. 1 kinds of Vehicular battery group management methods, is characterized in that, described method comprises:
Between the positive pole and vehicle load of described battery pack, in series positive switch is set;
Between the negative pole and described vehicle load of described battery pack, in series negative switch is set;
First resistance and first switch of one series connection are set, and by the first resistance of described series connection and the first switch-linear hybrid for be electrically connected in parallel with described vehicle load;
Closed described positive switch and described negative switch, and close or disconnect described first switch to control the temperature of described battery pack; And
When vehicle has an accident, disconnect described positive switch and described negative switch, and closed described first switch is to discharge described vehicle load.
18. methods as claimed in claim 17, wherein when to have an accident, disconnect described positive switch and described negative switch, and closed described first switch is to comprise described vehicle load electric discharge:
When vehicle has an accident, receive the accident signal of control unit for vehicle or safety air bag control unit; And
In response to described accident signal, disconnect described positive switch and described negative switch, and closed described first switch is to discharge described vehicle load.
19. methods as claimed in claim 17, wherein closed described positive switch and described negative switch, and closed or disconnect described first switch and comprise with the temperature controlling described battery:
Closed described positive switch and described negative switch;
Measure the temperature of described battery pack;
By measured temperature compared with predetermined temperature threshold;
When measured temperature is less than described temperature threshold, closed described first switch;
When measured temperature is equal to or greater than described temperature threshold, disconnect closed described first switch.
20. methods as claimed in claim 17, wherein said battery pack comprises multiple battery unit be in series electrically connected, and described method also comprises:
The distance be set between each described battery unit by described first resistance is equal.
21. methods as claimed in claim 17, wherein said battery pack is dispelled the heat by the air cooling system of described vehicle; And described method also comprises:
Described first resistance is arranged on the air intake place of described air cooling system.
22. methods as claimed in claim 17, wherein said first resistance is the first resistance that several are in series electrically connected, and described method also comprises:
Several first resistance described are evenly distributed in described battery pack.
23. methods as claimed in claim 22, wherein said battery pack is dispelled the heat by the liquid cooling system of described vehicle; And described method also comprises:
By several first resistance described near described battery pack.
24. methods as described in claim 22 or 23, wherein, described battery pack comprises the battery unit of multiple series connection, and described method also comprises:
Each in several first resistance described is electrically connected in parallel with a second switch respectively; And
Wherein closed described positive switch and described negative switch also close or disconnect described first switch, and the temperature controlling described battery pack comprises:
Closed described positive switch and described negative switch, and closed described first switch;
Respectively closed or disconnect in second switch described in several each, to control the temperature of each in described multiple battery unit respectively.
25. methods as claimed in claim 17, also comprise:
When described positive switch and described negative switch cannot disconnect, closed described first switch, by the energy of battery pack described in described first resistance consumption.
26. methods as claimed in claim 17, also comprise:
Outside described first resistance, betal can is set.
27. methods as claimed in claim 17, also comprise:
Described first resistance is set to prism-shaped, cylindric or sheet.
28. methods as claimed in claim 17, also comprise:
Described first resistance is set to multiple pellet resistances in parallel.
29. methods as claimed in claim 17, also comprise:
Pre-charge resistance is in series electrically connected with precharge switch, and the pre-charge resistance of described series connection and described precharge switch are set to be electrically connected in parallel with described positive switch; And
Before closing described positive switch and described negative switch, described method also comprises:
Disconnect described first switch and described positive switch;
Closed described precharge switch and described negative switch, being described vehicle load precharge by described battery pack; And
Described precharge switch is disconnected after precharge completes.
30. 1 kinds of Vehicular battery group management methods, comprising:
Between the positive pole and vehicle load of described battery pack, in series positive switch is set;
Between the negative pole and described vehicle load of described battery pack, in series negative switch is set;
First resistance and first switch of one series connection are set, and by the first resistance of described series connection and the first switch-linear hybrid for be electrically connected in parallel with described vehicle load;
Closed described positive switch and described negative switch, and close or disconnect described first switch to control the temperature of described battery pack; And
Described positive switch is detected and whether described negative switch cannot disconnect when vehicle has an accident;
When described positive switch being detected and described negative switch cannot disconnect, closed described first switch, by the energy of battery pack described in described first resistance consumption.
Whether 31. methods as claimed in claim 30, wherein detect described positive switch and described negative switch and cannot disconnect and comprising when vehicle has an accident:
When vehicle has an accident, receive the accident signal of control unit for vehicle or safety air bag control unit;
In response to described accident signal, detect described positive switch and whether described negative switch cannot disconnect.
32. methods as claimed in claim 30, wherein closed described positive switch and described negative switch, and closed or disconnect described first switch and comprise with the temperature controlling described battery pack:
Closed described positive switch and described negative switch;
Measure the temperature of described battery pack;
By measured temperature compared with predetermined temperature threshold;
When measured temperature is less than described temperature threshold, closed described first switch;
When measured temperature is equal to or greater than described temperature threshold, disconnect closed described first switch.
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| CN201410307920.8A CN105216632A (en) | 2014-06-30 | 2014-06-30 | For Vehicular battery group management system and method |
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| CN107284247A (en) * | 2017-06-19 | 2017-10-24 | 北京长安汽车工程技术研究有限责任公司 | A kind of electric automobile and high voltage distribution box |
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