CN108028446A

CN108028446A - Battery system and the electric vehicle with battery system

Info

Publication number: CN108028446A
Application number: CN201680049822.6A
Authority: CN
Inventors: 西川诚人; 小牧豪
Original assignee: Sanyo Electric Co Ltd
Current assignee: Sanyo Electric Co Ltd
Priority date: 2015-08-27
Filing date: 2016-08-04
Publication date: 2018-05-11
Anticipated expiration: 2036-08-04
Also published as: JPWO2017033412A1; CN108028446B; WO2017033412A1

Abstract

Equably cooled down to reduce the temperature difference of the battery cooled down by multiple heat exchangers, battery system has：Battery unit (2), it has the multiple monocells for being capable of discharge and recharge；Multiple heat exchangers (3), it cools down the monocell of battery unit (2) by the coolant of circulation；And cooling body (35), it links by for making the circulation path (8) of coolant circulation with heat exchanger (3).Circulation path (8) has the multiple branches (8B) for making coolant branch and being shunted, the branch (8B) links with heat exchanger (3), and the coolant come from cooling body (35) supply is diverted to each heat exchanger (3) from branch (8B) and is fed into each heat exchanger (3).Moreover, the flow adjustment portion for the flow for being used to control coolant is equipped with branch (8B), using the flow of flow adjustment portion control coolant, so that the temperature difference of the monocell linked using each heat exchanger (3) is homogenized.

Description

Battery system and the electric vehicle with battery system

Technical field

The present invention relates to one kind mainly for driving hybrid electric vehicle, plug-in hybrid electric vehicle and electric automobile etc. The power supply of the motor of automobile with etc. in the battery system that uses and electric vehicle with the battery system, more particularly to using changing Hot device to the battery unit being made of force the battery system of cooling and the electric car with battery system multiple monocells .

Background technology

The battery system of the big electric power of the vehicles such as hybrid electric vehicle, electric automobile is equipped on since the electric current of discharge and recharge is big, In addition used under various external conditions, so the temperature that there is a situation where battery rises.The temperature of battery, which rises, not only makes electricity The electrical characteristics in pond reduce, and shorten the service life of battery, and then the reason for as security is influenced, therefore, in the temperature of battery Need to be cooled down when becoming higher.For the battery that cooling temperature rises, develop and cooled down using the heat exchanger being made of coldplate The battery system of battery.(with reference to patent document 1)

Battery system described in patent document 1 make refrigerant circulated in coldplate and using refrigerant heat of vaporization into Row forces cooling.Therefore, which has the shortcomings that complicated and cost of parts is high.Specifically, this is because, the cooling The refrigerant for the liquid that high pressure is pressurized to using compressor is supplied to coldplate by system, it is therefore desirable to such as the following component：Pressure Contracting machine, it is used to pressurize to refrigerant；The condenser of heat exchanger, it is used to cool down the refrigerant to pressurize and make refrigerant Liquefaction；Expansion valve, it is used to make the refrigerant adiabatic expansion to have been liquefied by condenser.In addition, the cooling system is because by height The refrigerant of pressure is supplied to coldplate, so the refrigerant for needing to be set to make high pressure is not in the company of coldplate, the pipe arrangement of coldplate Knot leakage structure, in terms of assembling there is also it is time-consuming and laborious the shortcomings that.Therefore, there are cold for the battery system of patent document 1 But system complex and cost of parts, the shortcomings that manufacture is of high cost.

In view of the above-mentioned problems, present inventors have developed one kind without using refrigerant but to use cooling water in conduct Circulated in the heat exchanger of coldplate and cool down the battery system of battery unit.The battery system is because of the vaporization not against refrigerant Heat but cooled down with cooling water heat exchanging device, so heat exchanger will not be cooled to abnormal low temperature.Therefore, it is possible to notable Reduce the condensation on the surface of heat exchanger.In addition, because without supplying the refrigerant to have pressurizeed to heat exchanger, institute is so as to make heat exchange The connection of the structure of device, pipe arrangement simplifies, and can reduce cost of parts and assembly cost this two costs.

Prior art literature

Patent document

Patent document 1：Japanese Unexamined Patent Publication 2012-94376 publications

The content of the invention

Problems to be solved by the invention

But in the battery system with multiple batteries, changed to efficiently cool down these batteries it is necessary to have multiple Hot device.Particularly, it is necessary to which the multiple batteries cooled down using multiple heat exchangers are uniformly cooled down.For example, in order to make multiple heat exchangers Uniformly cooling is, it is necessary to which the flow for the coolant for making self-loopa forehearth limb and being supplied to each heat exchanger is identical.In addition, according to use Environment is different, and the temperature that battery occurs sometimes for battery system rises inequality.For example, in the purposes for being equipped on electric vehicle etc., Because of the environment of surrounding, easily heated region is locally being produced sometimes, the battery configured sometimes close to such region Temperature is heated must be higher in the temperature of the battery in other regions than configuration.In such use environment, reduce and changed using multiple The temperature difference for the battery that hot device is cooled down and the way that is uniformly cooled down are more difficult from.

Developed for the purpose of the shortcomings that present invention is further to solve the above.An object of the present invention is to provide A kind of temperature difference that can reduce the battery cooled down using multiple heat exchangers and the battery system that is uniformly cooled down and have The electric vehicle of the battery system.

The solution used to solve the problem

The battery system of the present invention has：Battery unit 2, it has the multiple monocells 1 for being capable of discharge and recharge；Multiple heat exchange Device 3, it cools down the monocell 1 of battery unit 2 by the coolant of circulation；And cooling body 35, its by for Make the circulation path 8 that coolant circulates and link with heat exchanger 3.Circulation path 8 has what is made coolant branch and shunted Multiple branch 8B, branch 8B link with heat exchanger 3, and the coolant come from the supply of cooling body 35 is shunted from branch 8B Each heat exchanger 3 is supplied to each heat exchanger 3.Moreover, it is equipped with the stream for the flow for being used to control coolant in branch 8B Adjustment part 20 is measured, the flow of coolant is controlled using flow adjustment portion 20, so as to make the list linked using each heat exchanger 3 The temperature difference homogenization of battery 1.

Utilize said structure, it is characterised in that：The temperature difference of the monocell cooled down using multiple heat exchangers can be reduced And uniformly cooled down.Specifically, this is because, the battery system using the flow adjustment portion for being arranged at branch control to The flow of the coolant of multiple heat exchanger supplies, so as to control the thermal energy that heat exchanger is drawn from monocell.Particularly, the electricity Cell system because in the branch linked with each heat exchanger being equipped with flow adjustment portion, so as to utilization is arranged on the flow of branch Adjustment part simply adjusts the flow of coolant.In addition, because being equipped with flow adjustment portion in the branch being connected with heat exchanger, So it also can easily implement the maintenance of flow control.

In the battery system of the present invention, flow adjustment portion 20 utilizes the resistance part to become larger by resistance the limit for making coolant The flow of the branch 8B of resistance part is set up, so as to control the flow of the coolant circulated in heat exchanger 3.

In the present specification, the application of " resistance part " includes extensive implication：Not only include being used to adjust being used as coolant Flow path circulation path internal diameter size implication, also comprising make the interior shape of circulation path, state change and limit cold But the state of the flow of liquid.

Using said structure, by partly adjusting the flow path resistance arranged on the resistance part of branch, it is limited in specific The flow of the coolant flowed in heat exchanger, so as to equably link monocell by multiple heat exchangers.For example, conduct The resistance part that flow adjustment portion is arranged on branch becomes the internal diameter of the circulation path for the branch being connected with specific heat exchanger It is small, the flow of the coolant circulated in the heat exchanger being connected with branch is limited in, utilizes heat exchanger to connect so as to control The battery temperature of knot.

The present invention battery system can using arranged on the flow rate regulating valve 24 of branch 8B as flow adjustment portion 20.

Using said structure, the aperture area arranged on the flow rate regulating valve of branch as flow adjustment portion is adjusted, so that It can simply and fine adjust the flow path resistance for the branch being connected with specific heat exchanger.Thereby, it is possible to by multiple Heat exchanger equably adjusts the temperature of multiple monocells.

In the battery system of the present invention, circulation path 8 is cold with multiple heat exchangers 3 and cooling body 35 are connected The coolant pipe 21, is connected by but liquid pipe 21 by connector portions 22 with heat exchanger 3, further, it is possible to by the different cooling of internal diameter Liquid pipe 21 or connector portions 22 are used as flow adjustment portion 20.

Using said structure, the different coolant pipe of internal diameter or connector portions are linked with each branch, for controlling Each heat exchanger circulation coolant flow, so as to equably cool down monocell using each heat exchanger.

In the battery system of the present invention, circulation path 8 has：Major cycle path 8A, it is connected with cooling body 35； And multiple branch 8B, the plurality of branch 8B are connected from the major cycle path 8A branches and with major cycle path 8A, from The coolant that the circulation of cooling body 35 comes can be shunted from major cycle path 35A to branch 35B, and be circulated in each heat exchanger 3.

In the battery system of the present invention, additionally it is possible to have and be used to store the outer of multiple battery units 2 and multiple heat exchangers 3 Fill housing 9.Heat exchanger 3 has：Cooling tube 31, it is used to circulate coolant；And coldplate 30, it is built-in with cooling tube 31, heat exchanger 3 makes the both ends of cooling tube 31 be protruded from coldplate 30 and as making coolant to the inside of cooling tube 31 The link end 32 of flowing, coldplate 30 can be configured and be accommodated in the state of 1 thermal of monocell with battery unit 2 In external shell 9, also, link end 32 is run through external shell 9, be connected in the outside of external shell 9 and branch 8B.

Using said structure, because multiple battery units and multiple heat exchangers are accommodated in external shell, and will circulation Path configuration is in the outside of external shell, and institute using the flow adjustment portion for being arranged on branch so as to simply adjust coolant Flow path system.It is further possible to easily implement the maintenance of circulation path.

In the battery system of the present invention, heat exchanger 3 makes link end 32 be protruded from the lower section of coldplate 30, also, makes Link the bottom surface 9A that external shell 9 is run through in end 32, so as to configure circulation path 8 in the bottom surface 9A sides of external shell 9.

In the battery system of the present invention, also there is the babinet 40 along the bottom surface 9A configurations of external shell 9, the babinet 40 Can have the recess 41 circulation path 8 configured in fixed position.

Using said structure, by being arranged at the circulation path configuration configured in the bottom surface side of external shell along outer The recess of the babinet of the bottom surface configuration of housing is filled, circulation path can be configured in fixed position and protection circulation path.

In the battery system of the present invention, heat exchanger 3 makes link end 32 be protruded from the top of coldplate 30, also, makes Link the top surface 9B that external shell 9 is run through in end 32, so as to configure circulation path 8 in the top surface 9B sides of external shell 9.

In the battery system of the present invention, external shell 9 has rhone 14 in upper surface, and makes rhone 14 with court To the outside of external shell 9, inclined mode tilts downwards, so as to make to leak from link end 32 or circulation path 8 Coolant discharged by rhone 14.

Using said structure, the circulation path from the top surface side for being configured at external shell can be made, link end leakage Coolant is discharged rapidly by the rhone for the upper surface for being formed in external shell.

The battery system of the present invention can have cap 19, which is used to cover to match somebody with somebody along the surface of external shell 9 The circulation path 8 put.

Using said structure, it can be covered using cap and protect the circulation path along the surface configuration of external shell.

In the battery system of the present invention, circulation path 8 can have coolant pipe 21, and it will be more which, which is used for, A heat exchanger 3 and cooling body 35 are connected, also, circulation path 8 has connector portions 22, which is used for coolant Pipe 21 is linked to from the link end 32 of the surface of external shell 9 protrusion.Connector portions 22 have：Canister portion 22A, it is for linking end 32 insertions；And fixinig plate 26, it is protruded from the outer circumferential surface of canister portion 22A, and external shell 9 has fixed part 16, the fixed part 16 From surface of shell protrusion and for fixinig plate 26 to be fixed, by the way that fixinig plate 26 is fixed on fixed part 16, will can connect The fixed position of external shell 9 is fixed on head 22.

Using said structure, connector portions can be firmly fixed at external shell, which is used for coolant pipe It is linked to and links end.Therefore, it is possible to which reliably the linking part for linking end and coolant pipe is linked using connector portions, so that It can effectively prevent the leakage of the coolant of the part.

In the battery system of the present invention, circulation path 8 has coolant pipe 21, which is used to change multiple Hot device 3 and cooling body 35 are connected, and coolant pipe 21 has the fixinig plate 27 protruded from outer circumferential surface, and external shell 9 has There is fixed part 17, the fixed part 17 is prominent from surface of shell and for fixinig plate 27 to be fixed, by the way that fixinig plate 27 is consolidated Due to fixed part 17, coolant pipe 21 can be fixed on to the fixed position of surface of shell.

Using said structure, coolant pipe can be firmly fixed to the fixed position on the surface of external shell.Therefore, It can suppress the drawbacks such as the dislocation of coolant pipe, effectively prevent the leakage of coolant.

In the battery system of the present invention, link end 32 be inserted into through hole 9a arranged on external shell 9 and to exterior The exterior of housing 9 protrudes, and between the inner surface of coldplate 30 and external shell 9, sealing is configured with around through hole 9a Part 13, so as to which heat exchanger 3 and external shell 9 are connected to waterproof construction.

Using said structure, the link end of heat exchanger can be made protruding to the outside through external shell, and reliably Heat exchanger and external shell are formed waterproof construction by ground.

The electric vehicle of the present invention has any of the above battery system 90, from the battery system 90 to for making vehicle row 93 supply electric power of motor sailed travels for vehicle.

Using said structure, the battery system for being equipped on vehicle is characterized in that, can be reduced and be utilized multiple heat exchanger institutes The temperature difference of the monocell of cooling and uniformly cooled down.Specifically, this is because, it is equipped on the battery system of the electric vehicle System controls the flow of the coolant supplied to multiple heat exchangers using the flow adjustment portion for being arranged at branch, so as to control The thermal energy that heat exchanger is drawn from monocell.For the electric vehicle for being equipped with battery system, there are the battery system in vehicle The situation that the setting position of system is restricted, the setting position there are battery system can cause temperature environment to have greatly changed Situation.For the electric vehicle of the present invention, because flow adjustment portion can be utilized according to the position of battery-mounted system Control to each heat exchanger supply coolant flow, institute so as to make using heat exchanger cool down monocell temperature it is equal It is even.Particularly, the loading position of battery system, the temperature environment of battery system are different because of vehicle, for the present invention, because Flow adjustment portion is equipped with the branch of circulation path, so each heat exchanger being connected with each branch can be into trip temperature Adjustment, so as to preferably be adjusted to the equalized temperature of multiple monocells.

Brief description of the drawings

Fig. 1 is the outline horizontal cross of the battery system of one embodiment of the present invention.

Fig. 2 is the II-II line sectional views of the battery system shown in Fig. 1.

Fig. 3 is the III-III line sectional views of the battery system shown in Fig. 1.

Fig. 4 is the bottom view of the battery system shown in Fig. 1.

Fig. 5 is the outline exploded perspective of the stepped construction of the battery unit and heat exchanger that represent the battery system shown in Fig. 1 Figure.

Fig. 6 is the stereogram for an example for representing battery unit.

Fig. 7 is the exploded perspective view of the battery unit shown in Fig. 6.

Fig. 8 is the stereogram for an example for representing heat exchanger.

Fig. 9 is the vertical transverse sectional view of the heat exchanger shown in Fig. 8.

Figure 10 is the amplification view for linking end and running through the structure of external shell for representing heat exchanger.

Figure 11 is the amplification summary construction diagram for an example for representing flow adjustment portion.

Figure 12 is the partial enlargement summary construction diagram of another for representing flow adjustment portion.

Figure 13 is the outline bottom view of the battery system of the embodiment of the present invention 2.

Figure 14 is the diagrammatic vertical sectional view of the battery system of the embodiment of the present invention 3.

Figure 15 is the sectional view of the fixed structure for the connector portions and external shell for representing the battery system shown in Figure 14.

Figure 16 is the XVI-XVI line sectional views for the fixed structure for representing connector portions and external shell shown in Figure 15.

Figure 17 is the vertical cross section of the fixed structure of the coolant pipe and external shell that represent the battery system shown in Figure 14 Figure.

Figure 18 is the bottom view for the fixed structure for representing coolant pipe and external shell shown in Figure 17.

Figure 19 is the diagrammatic vertical sectional view of the battery system of the embodiment of the present invention 4.

Figure 20 is the top view of the battery system shown in Figure 19.

Figure 21 is the XXI-XXI line sectional views of the battery system shown in Figure 20.

Figure 22 is the diagrammatic vertical sectional view of the battery system of the embodiment of the present invention 5.

Figure 23 is the bottom view of the battery system shown in Figure 22.

Figure 24 is the frame for representing to be equipped with the example of battery system using the hybrid vehicle of engine and motor traveling Figure.

Figure 25 is the block diagram for representing to be equipped with the example of battery system merely with the electric automobile of motor traveling.

Embodiment

Hereinafter, an embodiment of the present invention will be described based on the drawings.But embodiment as shown below is exemplified for making The battery system that the technological thought of the present invention embodies and the electric vehicle with the battery system, the present invention is not by battery system System and electric vehicle are defined to situations below.Moreover, the specification is in no way intended to limit the component shown in claims For the component of embodiment.

(embodiment 1)

The battery system 100 of Fig. 1 to Fig. 5 has：Battery unit 2, it has the multiple monocells 1 for being capable of discharge and recharge；It is more A heat exchanger 3, it cools down the monocell 1 of the battery unit 2 by the coolant of circulation；Cooling body 35, its by Link for making the circulation path 8 of coolant circulation with these heat exchangers 3.Moreover, battery system 100 shown in the drawings has For storing the external shell 9 of multiple battery units 2 and multiple heat exchangers 3, there is circulation to lead in the exterior arrangement of the external shell 9 Road 8.

(battery unit 2)

As shown in Figure 6 and Figure 7, battery unit 2 is being laminated two end faces of the stacked battery 7 that multiple monocells 1 form End plate 4 is configured with, and a pair of end plate 4 is connected using connecting piece 5.End plate 4 is fixed at the both ends of connecting piece 5, so that will The monocell 1 of stacking is fixed on pressed state.The monocell 1 of attached drawing is rectangular cell.Stacked battery 7 is in rectangular cell The membrane 6 of isolation material is accompanied between monocell 1 and is formed along the monocell 1 of thickness direction stacking rectangular cell.

(monocell 1)

Monocell 1 is lithium rechargeable battery.Can be ni-mh but monocell is not limited to lithium rechargeable battery All batteries that monocell etc. can charge.Monocell 1 is the electrode body for forming stacking positive-negative electrode plate storage (not shown) It is thickly closed in the promoting the circulation of qi of going forward side by side of outer tinning and filling electrolyte.Outer tinning is airtightly closed opening portion using hush panel.Exterior Tank carries out deep drawing to metallic plates such as aluminium, aluminium alloys and is process, and hush panel is used to make positive and negative electrode terminals 11 insulate simultaneously It is fixed.Metal outer tinning heat transfer is good, using the bottom surface 2A of battery unit 2 or side 2B as thermal face, Battery unit 2 is fixed on to the surface of heat exchanger 3 in the state of being combined with the surface heat of heat exchanger 3.

(membrane 6)

Membrane 6 is formed by insulating materials such as plastics, and the monocell 1 for making to be stacked on one another carries out layer in state of insulation each other It is folded.The membrane 6 is sandwiched between each monocell 1, for making adjacent monocell 1 insulate.Single electricity of the battery unit 2 in stacking The electrode terminal 11 in pond 1 is fixed with busbar 12, and monocell 1 is connected in series or is connected in parallel multiple monocells 1 Devices use busbar 12 be connected in series.Battery unit 2 can be serially connected monocell 1 and improve output electricity It is pressed into and improves output, adjacent monocell 1 can be connected in parallel and improve the electric current of discharge and recharge.

(battery block 10)

Battery system is configured with heat exchanger 3 in the bottom surface 2A or side 2B of battery unit 2, and electricity is cooled down using heat exchanger 3 The monocell 1 of pool unit 2.For the battery system 100 shown in Fig. 1, Fig. 2, Fig. 4 and Fig. 5, make battery unit 2 from Under the posture that posture shown in Fig. 6 is laid across, heat exchanger 3 is configured at bottom surface 2A.For shown in Fig. 1, Fig. 2, Fig. 4 and Fig. 5 For battery system 100, the heat exchanger of perpendicular attitude is configured between the opposite bottom surface 2A for being configured to the battery unit 2 of two row 3, battery unit 2 is configured in two faces of heat exchanger 3, so as to form battery block 10.

But although not shown, for battery system, battery unit 2 is under the posture shown in Fig. 6, also can Enough side 2B configured heat exchanger in battery unit 2.For the structure, in the side for the battery unit for being configured to two row Between configure perpendicular attitude heat exchanger, heat exchanger two faces configure battery unit, so as to can also form battery block.And And although not shown, but for battery system, battery unit is under the posture shown in Fig. 6, heat exchanger configuration is existed The bottom surface of battery unit, i.e., by battery unit configure in the upper surface of heat exchanger, can also form battery block.

(heat exchanger 3)

Heat exchanger 3 is with the state of the thermal face thermal with each monocell 1 is linked to monocell 1 and is used to cool down each Monocell 1.Heat exchanger 3 has：Cooling tube 31, it forms the circulation path for being used for circulating coolant；And coldplate 30, its The cooling tube 31 is built-in with, heat exchanger 3 is cooled down using the coolant circulated in the inside of cooling tube 31.Fig. 8's and Fig. 9 changes Hot device 3 is that the coldplate 30 that the cooling tube 31 of stainless steel is embedded in aluminum forms.Cooling tube 31 makes both ends from coldplate 30 protrude, and are formed and are used to make coolant in the link end 32 of internal flow.Heat exchanger 3 shown in Fig. 8 makes a pair of of link end 32 is prominent to the lower section of coldplate 30.As shown in Figure 10, which makes downward projection of link end 32 run through external shell 9 bottom surface 9A and it is protruding to the outside.

Heat exchanger 3 is configured in external shell 9 in the state of 1 thermal of monocell of the coldplate 30 with battery unit 2 is made It is interior, as shown in Figure 10, the through hole 9a arranged on external shell 9 is inserted into link end 32, and dash forward to the outside of external shell 9 Go out.Link end 32 using the prominent protuberance in outside as exterior linking part through external shell 9, and make to connect outside this Knot is connected in the outside of external shell 9 and circulation path 8.In order to which the through hole 9a of external shell 9 is sealed into watertight knot Structure, between 9 inner surface of coldplate 30 and external shell of heat exchanger 3, as shown in Figure 10, configures close around through hole 9a Sealing 13.Seal 13 is sandwiched between coldplate 30 and external shell 9, is sealed through hole 9a in the inner side of external shell 9 For watertight structure.The battery system configures the linking part for linking end 32 and circulation path 8 of heat exchanger 3 in external shell 9 Outside, through hole 9a is sealed into watertight structure using seal 13 of the configuration in the inner side of external shell 9.The structure make from The coolant for linking the linking part leakage of end 32 and circulation path 8 leaks into the outside of external shell 9, moreover, utilizing sealing Through hole 9a is sealed into watertight structure by part 13, therefore reliably prevents the coolant of leakage from entering the inside of external shell 9, no Harm can be brought to battery unit 2.

Heat exchanger 3 above cools down coldplate 30 using the coolant circulated in cooling tube 31.Coldplate 30 with Battery unit 2 is configured at the state of 2 thermal of battery unit and cools down monocell 1.So, it is built-in with for making cooling The heat exchanger 3 of the cooling tube 31 of liquid circulation can reliably prevent that liquid leakage occurs in inside.In addition, for by cooling tube 31 It is embedded in for the heat exchanger 3 of coldplate 30, the heat transfer of cooling tube 31 and coldplate 30 is excellent, can utilize in cooling tube 31 The coolant of circulation efficiently cools down coldplate 30, so as to efficiently be cooled down to monocell 1.In addition, will The thermal capacity that metal is formed as the coldplate 30 that tabular forms is big, can efficiently absorb the fever of monocell 1 and limit single electricity The temperature in pond 1 rises.In addition, after the circulation stopping of coolant is made, monocell 1 can also be cooled down.But this hair The structure of bright heat exchanger is not limited to the structure of the above.Heat exchanger can for example be set to cooling tube being fixed on the table of metallic plate Structure that face forms or the structure that forms cooling tube configuration between two panels metallic plate etc. can be by circulating coolant And all structures of cooling surface.As shown in Figures 1 to 4, multiple heat exchangers 3 are by circulation path 8 and 35 phase of cooling body Link.

(cooling body 35)

Cooling body 35 makes coolant be circulated in multiple heat exchangers 3 and cools down each heat exchanger 3 by circulation path 8. As shown in Figure 1, cooling body 35 has：Heat exchanger 36, it is used to cool down coolant；Circulating pump 37, it is used to make profit The coolant cooled with the heat exchanger 36 circulates；And control circuit 38, its battery temperature for being used to detect battery unit 2 and The operating of control loop pump 37.For the cooling body 35, control circuit 38 detects battery temperature using temperature sensor 39 The operating of degree and control loop pump 37, so as to control the state of cooling of heat exchanger 3.When battery temperature is higher than design temperature, control Circuit 38 processed operates circulating pump 37.When circulating pump 37 operates, coolant circulates in heat exchanger 3 and heat exchanging device 3 carries out Cooling.When battery temperature is lower than design temperature, control circuit 38 makes circulating pump 37 shut down.In this condition, coolant Do not circulated in heat exchanger 3, heat exchanger 3 is in the state without forcing cooling.The storage of control circuit 38 transports circulating pump 37 The design temperature turned, using the operating of design temperature control loop pump 37, so as to controlling battery temperature in setting range.

(circulation path 8)

Circulation path 8 has：Major cycle path 8A, it is connected with cooling body 35；And multiple branch 8B, this is more A branch 8B links from the major cycle path 8A branches with major cycle path 8A.Circulation path 8 makes branch 8B and heat exchange Device 3 is connected.Circulation path 8 makes from the coolant that the supply of cooling body 35 comes to multiple branches from major cycle path 8A branches Portion 8B is shunted, so as to be circulated in each heat exchanger 3.

Circulation path 8 is configured in the outside of external shell 9 and is bottom surface 9A by the battery system 100 shown in Fig. 1 to Fig. 4 Side.The battery system 100 of attached drawing is that four battery blocks 10 are lined up two rows two to be accommodated in external shell 9 with arranging, along with configuration The central portion configuration circulation path 8 of the opposite position in region, i.e. bottom surface 9A between the battery block 10 arranged for left and right two.For figure For circulation path 8 shown in 1 and Fig. 4, make the top of major cycle path 8A that is connected with cooling body 35 to three directions Branch, in the lateral direction the branch 8B of branch and the heat exchanger 3 of left and right battery block 10 positioned at leading portion be connected, and make to The further branch in the lateral direction in the top of the branch 8B of straight direction branch, the branch 8B of this part with positioned at back segment The heat exchanger 3 of left and right battery block 10 is connected.

Circulation path 8 shown in the drawings has the circulation path 8X of inflow side and the circulation path 8Y of reflux side, inflow side Circulation path 8X branch 8B with from heat exchanger 3 protrude one link end 32 be connected, meanwhile, the circulation of reflux side is led to The branch 8B of road 8Y from another link end 32 that heat exchanger 3 protrudes with being connected.I.e., the circulation path 8 is used to make from cold But the coolant that the supply of mechanism 35 comes is shunted to four direction in the branch 8B of the circulation path 8X of inflow side and flowed into each Heat exchanger 3, meanwhile, make to be back to cooling at the circulation path 8Y interflow of reflux side from the coolant of each heat exchanger 3 discharge Mechanism 35.Thus, the heat exchanger 3 of four Battery pack blocks 10 is connected in parallel by circulation path 8.

Circulation path 8 has the coolant pipe 21 for being used for linking multiple heat exchangers 3 and cooling body 35.It is shown in the drawings Heat exchanger 3 and multiple coolant pipes 21 are connected by circulation path 8 using connector portions 22,23, and by connected to each other cold But liquid pipe 21 makes coolant be circulated in heat exchanger 3.Coolant pipe 21 is the pipe of resin-made.But coolant pipe is not necessarily It is the pipe of resin-made, all pipes that hose of metal tube, rubber-like elastic body etc. can be used to circulate coolant.Cause This, " pipe " in the specification comprising the broad sense including hose to be used.

Circulation path 8 shown in Fig. 1 to Fig. 4 is by connector portions 22 by the link end 32 protruded from external shell 9 and cold But liquid pipe 21 is connected, and also coolant pipe 21 is connected with each other knot by connector portions 23.Connector portions 22,23 are resin-made or gold Belong to system, or the local resin-made with metal portion, be set to that end 32 can will be linked and coolant pipe 21 connects to watertight Structure.As shown in Figure 10, connector portions 22,23 have the cylinder that can be inserted into for the top ends of link end 32, coolant pipe 21 Portion 22A, will link end 32, the top ends of coolant pipe 21 are inserted into and are engaged in the inner side of canister portion 22A, or pass through screw thread With reference to the inner side for being linked to canister portion 22A.Moreover, linking portion can also form watertight structure using seal, sealing material.

Herein, as shown in Figure 1 and Figure 4, for multiple heat exchangers 3 are divided into leading portion and back segment, and utilize each For the structure that branch 8B makes the coolant shunting from major cycle path 8A supplies and circulates, usually there is following tendency：With The flow-rate ratio of the coolant of the heat exchanger 3 for the back segment that branch 8Bs of the spontaneous circulation path 8A away from configuration is connected and close master The flow of the coolant of the heat exchanger 3 for the leading portion that the branch 8B of circulation path 8A configurations is connected is small.In this case, with it is preceding The heat exchanger 3 of section is compared, and the heat exchanger 3 of back segment is difficult to cooled and causes temperature to become higher, and can not make the temperature of all heat exchangers Degree becomes uniform.

In addition, for battery system, because its use environment is different, specific battery block is than other battery blocks sometimes Heated temperature is high.For example, being equipped in the power supply as electric vehicle etc. in the battery system of vehicle, it carries position sometimes Put and be subject to a variety of limitations, not will all battery blocks all configure in identical temperature environment.In this case, because configuration exists Easily the battery block of heated region (such as, close to region, the region of dissipating-heat environment difference of generating component) is more electric than other Pond deblocking temperature rises greatly, so multiple batteries using the cooling of multiple heat exchangers can not be made uniformly to cool down.

It is such in order to solve the problems, such as, in the battery system of the present invention, it is equipped with and is used in the branch 8B of circulation path 8 The flow adjustment portion of the flow of coolant is controlled, using the flow of flow adjustment portion control coolant, so as to make utilization The temperature difference homogenization for the monocell 1 that each heat exchanger 3 links.Flow adjustment portion is using making becoming larger by resistance for coolant Resistance part limits the flow of the branch 8B equipped with resistance part, so as to control the flow of the coolant circulated in heat exchanger 3. Flow adjustment portion 20 for example adjusts the flow path bore of branch 8B, so as to adjust the flow of the coolant circulated in heat exchanger 3. The flow adjustment portion 20 makes the coolant circulated in heat exchanger 3 by carrying out local directed complete set to the flow path bore of branch 8B Changes in flow rate so that reduce using multiple heat exchangers 3 cooling monocell 1 temperature difference and uniformly cooled down.It is specific and Speech, be located at the flow adjustment portion for the branch 8B being connected with wanting the heat exchanger 3 that efficiently cools down make flow path bore become larger and Increase the flow of coolant, being located at the flow adjustment portion for the branch 8B being connected with the heat exchanger 3 for wanting to suppress to cool down makes stream Crossing footpath diminishes and reduces the flow of coolant.

An example of such flow adjustment portion 20 is shown in Figure 11.The adjustment of flow adjustment portion 20 shown in Figure 11 forms branch The coolant pipe 21 of portion 8B or the internal diameter of connector portions 22, so as to adjust resistance part.The flow adjustment portion 20 make composition with it is specific The coolant pipe 21 of branch 8Ba, 8Bb that is connected of heat exchanger 3A, 3B and connector portions 22 internal diameter be different from forming and its The coolant pipe 21 of branch 8Bc, 8Bd that his heat exchanger 3C, 3D is connected and the internal diameter of connector portions 22.Specifically, lead to Cross the internal diameter for being used in coolant pipe 21 that coolant circulates in heat exchanger 3A, the 3B for being configured at leading portion or connector portions 22 Than for making the internal diameter of coolant pipe 21 that coolant circulates in heat exchanger 3C, the D for being configured at back segment or connector portions 22 small, So that the flow of the coolant circulated in four heat exchangers 3A, 3B, 3C, 3D is equal.Thus, reduce and utilize multiple heat exchangers 3 cooling multiple monocells 1 temperature difference and uniformly cooled down.

Furthermore, battery system by will with want coolant pipe that the heat exchanger that efficiently cools down be connected or The internal diameter of connector portions becomes larger, becomes the internal diameter of the coolant pipe being connected with the desired heat exchanger for suppressing cooling or connector portions It is small, uniformly cooled down so as to reduce the temperature difference of the multiple monocells cooled down using multiple heat exchangers.It is for example, right For battery system, in fig. 11, wanting to make heat exchanger 3D that cooling be effectively performed than other heat exchanger 3A, 3B, 3C In the case of, composition is compared structure with the heat exchanger 3D coolant pipes 21 of branch 8Bd being connected or the internal diameter of connector portions 22 Into in the coolant pipe 21 for branch 8Ba, 8Bb, the 8Bc being connected with other heat exchanger 3A, 3B, 3C or connector portions 22 Footpath is big, either makes composition and the coolant pipe 21 or connector of heat exchanger 3A, 3B, 3C branch 8Ba, 8Bb, 8Bc being connected The internal diameter in portion 22 is smaller with the coolant pipe 21 of the heat exchanger 3D branch 8Bd being connected or the internal diameter of connector portions 22 than forming.

Flow adjustment portion 20 shown in Figure 11 makes coolant pipe 21 and the internal diameter both connector portions 22 diminish, but also can It is enough the internal diameter of any one of coolant pipe 21 and connector portions 22 is diminished.

Furthermore, flow adjustment portion 20 can also form the structure shown in Figure 12.Flow adjustment portion shown in Figure 12 20 are equipped with the flow rate regulating valve 24 for the sectional area for being used to adjust flow path in circulation path 8.For the circulation path 8 shown in Figure 12 Speech, for making the connector portions 22 of all branch 8B that coolant is diverted to four heat exchangers 3 be equipped with flow rate regulating valve 24. Flow rate regulating valve 24 shown in Figure 12 is made of the adjusting screw 25 arranged on connector portions 22.The flow rate regulating valve 24, which has to run through, to be connect The adjusting screw 25 of the outer circumferential surface on head 22, by rotating the adjusting screw 25, adjusts the adjusting spiral shell of the inside of connector portions 22 The overhang of nail 25, so as to adjust the sectional area of the flow path of the coolant of the inside of connector portions 22.The flow rate regulating valve 24 Such as make adjusting screw 25 internally protrude it is larger in the state of, make coolant flow path sectional area reduce, can reduce By the flow of the coolant of the part, in the state of adjusting screw 25 is retreated, become the sectional area of the flow path of coolant Greatly, by increasing capacitance it is possible to increase by the flow of the coolant of the part.Therefore, there are following feature for the flow adjustment portion 20：By adjusting The overhang of adjusting screw 25, so as to be finely adjusted to the flow of the coolant by each branch 8B.But arranged on following The flow rate regulating valve of ring path is not necessarily defined to the adjusting screw prominent into flow path.Valve, which can use, can change flow path Sectional area other all mechanisms.

Circulation path 8 shown in Figure 12 makes to be arranged on the stream with specific heat exchanger 3A, 3B branch 8Ba, 8Bb being connected The flow path area of amount adjustment valve 24 becomes larger, and makes the flow tune for being arranged on branch 8Bc, 8Bd for being connected with heat exchanger 3C, 3D The flow path area of whole valve 24 diminishes.Specifically, the tune in heat exchanger 3A, 3B of leading portion connector portions 22 being connected with configuration is made Section screw 25 protrudes inwardly and reduces the sectional area of flow path, does not make to connect what heat exchanger 3C, 3D of back segment were connected with configuring The adjusting screw 25 on head 22 protrudes inwardly and increases the sectional area of flow path.Thus, make in four heat exchangers 3A, 3B, 3C, 3D The flow of the coolant of middle circulation is equal, so as to reduce the temperature difference of the monocell 1 cooled down using multiple heat exchangers 3 and carry out Equably cool down.

Furthermore, the branch that battery system is connected by the heat exchanger for making to be arranged on want more efficiently to cool down The flow path area of flow rate regulating valve become larger, make the flow tune for being arranged on the branch being connected with the desired heat exchanger for suppressing cooling The flow path area of whole valve diminishes, and is carried out uniformly so as to reduce the temperature difference of the monocell cooled down using multiple heat exchangers Ground cools down.For example, for battery system, in fig. 12, wanting to make heat exchanger 3D than other heat exchanger 3A, 3B, 3C In the case of more efficiently cooling down, make the flowpath face for being arranged on the flow rate regulating valve 24 for the branch 8Bd being connected with heat exchanger 3D Product becomes larger, and makes to be arranged on the stream with the flow rate regulating valve 24 of other heat exchangers 3A, 3B, 3C branch 8Ba, 8Bb, 8Bc being connected Road surface product diminishes.

The circulation path 8 of Figure 12 is equipped with flow rate regulating valve 24 in all branch 8B being connected with heat exchanger 3.Should Structure is arranged on the flow rate regulating valve 24 for the branch 8B being connected with each heat exchanger 3 by adjusting respectively, all by being flowed into The flow of the coolant of heat exchanger 3 is adjusted to most suitable, so as to make the temperature of battery uniform.But flow rate regulating valve The branch being connected with the heat exchanger of desired adjustment flow can be only arranged on.

In addition, in Figure 11 and Figure 12, wanting to suppress inflow positioned at the coolant of left and right heat exchanger 3C, 3D of back segment In the case of flow, also flow adjustment portion 20 can be set in branch 8Bc, the 8Bd being connected with left and right heat exchanger 3C, 3D, But also can be in the component of leading portion, into the branch 8e of straight direction branch set flow adjustment portion 20.

More than flow adjustment portion 20 by varying coolant pipe 21, the internal diameter size of connector portions 22,23, or in connector Portion 22,23 sets flow rate regulating valve 24, so as to adjust the flow path bore of circulation path 8.But for flow adjustment portion, The structure of flow path bore for adjusting circulation path 8 is not limited to the structure of the above.Flow adjustment portion can also lead to circulation Interior shape, the state change on road 8 and adjust the sectional area of the actual flow path of coolant.For example, for being made of metal tube Coolant pipe for, make that shape of cross section becomes ellipse or oval reduces sectional area by carrying out extruding, also can Enough flow path bores for reducing essence.In addition, for the coolant pipe being made of flexible hose, by using clamping device Sectional area is set to diminish etc. being extruded, so as to can also reduce substantive flow path bore.

In addition, the flow adjustment portion 20 of above tune in a manner of making the temperature of all monocells 1 in predetermined scope The degree of the whole flow path bore for reducing circulation path 8.Herein, coolant is made to be circulated in multiple heat exchangers 3 and cool down battery The tendency that the temperature of each monocell 1 during unit 2 reduces can be obtained rule of thumb or according to experiment.Therefore, flow adjusts Portion 20 with reference to the temperature rising of monocell 1 in the state of not making coolant circulate in heat exchanger 3 tendency and make it is cold Tendency that the temperature of monocell 1 during the cooling that but liquid circulates in each heat exchanger 3 reduces etc., so that each heat exchanger 3 can subtract The temperature difference of the monocell 1 of baby battery unit 2 and the mode that is equably cooled down adjust the flow path bore of circulation path 8.

(external shell 9)

External shell 9 is formed as the closed structure for not making extraneous gas enter internal ventilation.The external shell 9 will not occur Extraneous gas enters and the situation of surface sweating in heat exchanger 3.Therefore, it is possible to make the dew condensation water on 3 surface of heat exchanger seldom, or Person is almost without dew condensation water.Moreover, external shell 9, which closes into the coolant circulated in heat exchanger 3, leaks into outside, It will not make watertight structure of the coolant inside.Because water will not be externally entering the battery system, the battery system It can configure in the outside of vehicle.

(embodiment 2)

Moreover, for battery system, as shown in figure 13, limited be subject to setting position etc., sometimes the institute of battery block 10 The number for the monocell 1 having is different.For the battery system 200 shown in Figure 13, the battery of the left and right of back segment is configured at The quantity of monocell 1 possessed by block 10 ' is fewer than the quantity for being configured at monocell 1 possessed by the left and right battery block 10 of leading portion. For the battery system 200 shown in Figure 13, there is battery unit 2 in two faces of heat exchanger 3 with the battery block 10 of leading portion Situation it is opposite, the battery block 10 ' of back segment is only configured with battery unit 2 in the single side face of heat exchanger 3.For the battery of the structure For system 200, the monocell 1 for being configured at back segment easier than the monocell 1 for being configured at leading portion is cooled.Therefore, for the knot For the battery system 200 of structure, the flow-rate ratio of the coolant circulated in the heat exchanger 3 for being configured at the battery block 10 of leading portion with It is more to be placed in the heat exchanger 3 of the battery block 10 ' of back segment the flow of the coolant circulated, multiple institutes of heat exchanger 3 are utilized so as to reduce The temperature difference of the monocell 1 of cooling and equably cooled down.Therefore, for the battery system 200, with configuring preceding The flow path area of branch 8B that the heat exchanger 3 of the battery block 10 of section is connected is changed than the battery block 10 ' with configuring in back segment The mode that the flow path area for the branch 8B that hot device 3 is connected is big sets flow adjustment portion 20 and adjusts the stream of each branch 8B Amount.

(embodiment 3)

Moreover, for the battery system 300 shown in Figure 14, the circulation path 8 in the bottom surface side of external shell 9 is configured Fixed position is fixed on by the fixed part 16,17 arranged on surface of shell.Figure 15 and Figure 16 shows connector portions 22 being fixed on outer The state of housing 9 is filled, which is used to coolant pipe 21 being linked to as the heat exchange protruding outside to external shell 9 The exterior linking part 33 of the link end 32 of device 3.

Connector portions 22 shown in Figure 15 and Figure 16 have fixinig plate 26, which links the cylinder being inserted into end 32 from confession Portion 22A is prominent to peripheral direction.Fixinig plate 26 is plane, is formed as the radial direction to canister portion 22A and axially extending square Shape shape.External shell 9 has the fixed part 16 for anchor tip portion 22, which is formed as protruding from bottom surface 9A Ribbed.The fixed part 16 of the fixinig plate 26 of connector portions 22 and external shell 9 is stacked on one another, also, by through they Fixing piece 18 is fixed.Fixing piece 18 shown in the drawings has bolt 18A and nut 18B, makes bolt 18A consolidating through stacking Stator 26 and fixed part 16, also, by the way that nut 18B to be screwed into the top of bolt 18A, clipping fixinig plate 26 and fixed part 16 In the state of both are fixed.But bolt can be also fixed by being screwed into fixed part or fixinig plate.For the connector For portion 22, exterior linking part 33 is inserted into canister portion 22A, also, the fixinig plate 26 protruded from canister portion 22A is fixed on and is arranged on The fixed part 16 of external shell 9 and be fixed on fixed position.Thus, by for linking exterior linking part 33 and coolant pipe 21 Connector portions 22 are firmly fixed at external shell 9, can effectively prevent coolant from being leaked from the linking part.

In addition, Figure 17 and Figure 18 show for coolant pipe 21 to be fixed on the state of external shell 9.Shown in Figure 17 and Figure 18 Coolant pipe 21 has the fixinig plate 27 protruded from periphery towards tangential direction.Fixinig plate 27 is plane, is formed as from cooling The shape that the outer circumferential surface of liquid pipe 21 is protruded towards external shell 9.External shell 9 has the fixed part for being used for fixing coolant pipe 21 17, the ribbed which is formed as protruding from bottom surface 9A.By the fixinig plate 27 of coolant pipe 21 and consolidating for external shell 9 Determine portion 17 to be stacked on one another, also, be fixed by the fixing piece 18 through them.Fixing piece 18 shown in the drawings is stop spiral shell Nail, by 17 fixation engaged through the thread of the fixinig plate 27 of stacking and fixed part.But fixing piece also can be screw bolt and nut. The coolant pipe 21 is fixed in fixed position in a manner of the fixation of fixed part 17 that fixinig plate 27 is located at external shell 9.By This, external shell 9 is firmly fixed at by coolant pipe 21, by suppressing the dislocation of coolant pipe 21, can effectively be prevented Coolant is leaked from coolant pipe 21 and the linking part of connector portions 22,23.

Moreover, the battery system 300 shown in Figure 14 has cap 19, which is used to cover along external shell 9 The circulation path 8 of surface (the bottom surface 2A in attached drawing) configuration.Cap 19 shown in the drawings is covered along the bottom surface of external shell 9 The plate of the flute profile of the whole circulation path 8 of the central portion configuration of 9A.The cap 19 can be covered and protected and be configured along bottom surface 9A Whole circulation path 8.The structure can utilize cap 19 to prevent circulation path 8 directly and external contact, therefore can cover And the whole circulation path 8 of protection.Moreover, cap 19 shown in the drawings is formed as flute profile, leaked in coolant from circulation path 8 In the case of, which can be used as rhone to carry out efficiently draining.Therefore, in the state of coolant leakage, The coolant of leakage can be made to be flowed down along the cap 19, so that coolant be discharged to the outside from specific part.

(embodiment 4)

Moreover, for the battery system 400 shown in Figure 19 to Figure 21, multiple heat exchangers 3 make link end 32 to cold But the top of plate 30 protrudes, also, link end 32 is run through the top surface 9B of external shell 9, and circulation path 8 is configured The top surface side of external shell 9.As shown in figure 20, which also configures two row battery blocks in the inside of external shell 9 10, multiple heat exchangers 3, are connected by the central portion in the top surface 9B sides of external shell 9 using circulation path 8.For attached drawing For battery system 400, link end 32 and the circulation path 8 of heat exchanger 3 are configured with the central portion of external shell 9.

Moreover, for the external shell 9 shown in Figure 19 to Figure 21, in order to be leaked from the linking part of circulation path 8 Peripheral direction from coolant to external shell 9 discharge, in upper surface formed with rhone 14.External shell 9 shown in the drawings In the extending direction (left and right directions in attached drawing) from the both sides for multiple link ends 32 that heat exchanger 3 protrudes along heat exchanger 3 Rhone 14 is set with extending to two ora terminalis of external shell 9.The rhone 14 for being formed in the both sides for linking end 32 is put down each other OK, formed in a manner of being tilted down from the centrally directed left and right sides of the left and right of external shell 9.Moreover, in a pair of of connecting end The left and right sides in portion 32 is equipped with the connecting slot 15 for linking a pair of of rhone 14.In addition, the coolant circulated in circulation path 8 It is high from the possibility for the linking part leakage for linking end 32 and branch 8B.Therefore, the structure is by being easiest to that liquid occurs Rhone 14 and connecting slot 15 are set around the linking part for linking end 32 and circulation path 8 of leakage, made from circulation path 8 The coolant of leakage reliably flows into rhone 14 and connecting slot 15, so as to implement swimmingly draining.

(embodiment 5)

Moreover, the battery system 500 shown in Figure 22 and Figure 23, as above-mentioned battery system 100, multiple heat exchangers 3 make Link end 32 is prominent to the lower section of coldplate 30, also, makes link end 32 through the bottom surface 9A of external shell 9, so that will Circulation path 8 is configured in the bottom surface 9A sides of external shell 9.Furthermore, battery system 500 has along external shell 9 The babinet 40 of bottom surface 9A configurations.Babinet 40 shown in the drawings forms the shape along the bottom surface 9A of external shell 9, and has energy The depth of circulation path 8 of enough storage configurations in the bottom surface 9A sides of external shell 9.Furthermore, babinet 40 shown in the drawings Formed with the recess 41 configured circulation path 8 in fixed position.As shown in figure 23, the recess 41 of babinet 40 is under babinet 40 Face side, so as to the mode of storage circulation path 8 is formed along around circulation path 8, and is configured to be accommodated in recessed The circulation path 8 in portion 41 configures in fixed position and can protect the structure of circulation path 8.

As such babinet 40, for example, for the structure for making whole housing be formed as light, it can use and mould hard Material is formed as the component that hollow form forms.The generally hollow form of the babinet 40 and become light, be internally provided with erect appearance Multiple ribs intersected with each other etc. under state, so as to strengthen whole housing.

In embodiment more than, show the bottom surface side or top surface side circulation path 8 configured in external shell 9 Example, still, battery system can also configure circulation path in the side of external shell.In this case, heat exchanger is formed To make the link end shape prominent to horizontal direction, the state of multiple battery units and link plate is configured with external shell Under, make to link end through the side of external shell and protruding to the outside from what heat exchanger protruded.By circulation path be linked to from The link end of the side protrusion of external shell is simultaneously linked to cooling body.I.e., side of the battery system along external shell It is configured with circulation path.

More than battery system can apply for the row for being equipped on the electric vehicles such as hybrid electric vehicle, electric automobile Sail the power supply of motor supply electric power, for carrying out electric power storage to the generation power of the natural energies such as solar power generation, wind-power electricity generation In power supply or the various uses such as power supply for carrying out electric power storage to late into the night electric power, it can particularly be used as and be adapted to big electric power, big The power supply of the purposes of electric current uses.For the vehicle of battery system is equipped with, can act as using engine and motor this Hybrid vehicle, plug-in hybrid-power automobile or the electric automobile merely with motor traveling of both travelings etc. are electronic Vehicle, and battery system can be used as the power supply of these vehicles.

(Hybrid Vehicle battery system)

Figure 24 shows for battery system to be equipped on the example of the hybrid vehicle travelled using both engine and motor Son.The vehicle HV for being equipped with the battery system 100 shown in the drawings has：Engine 96 and the motor of traveling 93, they are used Travelled in making vehicle HV；Battery system 100, it is used for 93 supply electric power of motor；Generator 94, it is used for battery system 100 battery charges；Vehicle body 91, it is equipped with engine 96, motor 93, battery system 100 and generator 94； And wheel 97, it is driven by engine 96 or motor 93, for travelling vehicle body 91.Battery system 100 is by DC/ AC inverters 95 are connected with motor 93 and generator 94.Vehicle HV to the battery of battery system 100 while carry out discharge and recharge on one side Travelled using both motor 93 and engine 96.Motor 93 in the region of engine efficiency difference, such as when accelerating, run at a low speed When driven and make vehicle HV travel.Motor 93 obtains power supply to be driven from battery system 100.Generator 94 is sent out Motivation 96 drives, or is driven by the regenerative braking when implementing to brake to vehicle, and the battery of battery system 100 is filled Electricity.

(battery for electric automobile system)

In addition, Figure 25 represents the example in the battery-mounted system of electric automobile travelled merely with motor.It is attached to be equipped with this The vehicle EV of battery system 100 shown in figure has：Traveling uses motor 93, it is used to travel vehicle EV；Battery system 100, It is used for 93 supply electric power of the motor；Generator 94, it is used to charge to the battery of the battery system 100；Vehicle master Body 91, it is equipped with motor 93, battery system 100 and generator 94；Wheel 97, it is driven by motor 93, for making vehicle Main body 91 travels.Battery system 100 is connected by DC/AC inverters 95 with motor 93 and generator 94.Motor 93 is come from The power supply of battery system 100 is to be driven.Generator 94 is driven by the energy when implementing regenerative braking to vehicle EV It is dynamic, charge to the battery of battery system 100.

For the battery system of electric vehicle is equipped on, although being subject to the setting position in vehicle Limitation, but various change is carried out in the shape of the circulation path of the outside of external shell, configuration to configuring according to the vehicle of carrying Become, it becomes possible to optimal pipe arrangement is realized in vehicle.In addition, in the present invention, there is flow adjustment portion in circulation path, therefore can Adjusted according to the temperature environment of the loading position for the vehicle for being equipped with battery system into trip temperature.For example, the temperature of battery system Environment is different because of car type, setting position, surrounding environment etc., there is also easily heated region, but by according to configuration In the tendency that the temperature of the monocell in each region rises, the flow of the coolant circulated in heat exchanger is controlled, can be to temperature Balance is preferably adjusted.

Industrial applicability

The battery system of the present invention can be used as the vapour such as driving hybrid electric vehicle, plug-in hybrid electric vehicle, electric automobile The power supply of the motor of car suitably with.

Description of reference numerals

100th, 200,300,400,500 ... battery systems, 1 ... monocell, 2 ... battery units, 2A ... bottom surfaces, 2B ... sides Face, 3 ... heat exchangers, 3A, 3B, 3C, 3D ... heat exchanger, 4 ... end plates, 5 ... connecting pieces, 6 ... membranes, 7 ... stacked batteries, 8 ... Circulation path, 8X ... inflow sides circulation path, 8Y ... reflux sides circulation path, 8A ... major cycles path, 8B ... branches, 8Ba, 8Bb, 8Bc, 8Bd, 8Be ... branch, 9 ... external shells, 9A ... bottom surfaces, 9B ... top surfaces, 9a ... through holes, 10 ... battery blocks, 10 ' ... battery blocks, 11 ... electrode terminals, 12 ... busbars, 13 ... seals, 14 ... rhones, 15 ... connecting slots, 16 ... are fixed Portion, 17 ... fixed parts, 18 ... fixing pieces, 18A ... bolts, 18B ... nuts, 19 ... caps, 20 ... flow adjustment portions, 21 ... coolings Liquid pipe, 22 ... connector portions, 22A ... canister portions, 23 ... connector portions, 24 ... flow rate regulating valves, 25 ... adjusting screws, 26 ... fixinig plates, 27 ... fixinig plates, 30 ... coldplates, 31 ... cooling tubes, 32 ... link ends, 35 ... cooling bodies, 36 ... heat exchangers, 37 ... are followed Ring pump, 38 ... control circuits, 39 ... temperature sensors, 40 ... babinets, 41 ... recesses, 91 ... vehicle bodies, 93 ... motors, 94 ... Generator, 95 ... DC/AC inverters, 96 ... engines, 97 ... wheels, HV ... vehicles, EV ... vehicles.

Claims

1. a kind of battery system, wherein, which has：

Battery unit, it has the multiple monocells for being capable of discharge and recharge；

Multiple heat exchangers, it cools down the monocell of the battery unit by the coolant of circulation；And

Cooling body, it links by for making the circulation path of coolant circulation with the heat exchanger,

The circulation path has the multiple branches for making coolant branch and being shunted, which connects with the heat exchanger Knot, the coolant come from cooling body supply flow to each heat exchanger from the component and are fed into each heat exchange Device,

Moreover, being equipped with the flow adjustment portion for the flow for being used to control coolant in the branch, the flow adjustment portion is utilized The flow of coolant is controlled, so that the temperature difference of the monocell linked using each heat exchanger is homogenized.

2. battery system according to claim 1, wherein,

The flow adjustment portion utilizes the resistance part to become larger by resistance the limitation for making the coolant to be equipped with the resistance part The flow of the branch, so as to control the flow of the coolant circulated in the heat exchanger.

3. battery system according to claim 2, wherein,

The flow adjustment portion is provided at the flow rate regulating valve of the branch.

4. battery system according to claim 2, wherein,

The circulation path has the coolant pipe that the multiple heat exchanger and the cooling body are connected, by connector portions The coolant pipe and the heat exchanger are connected,

The flow adjustment portion is the different coolant pipe of internal diameter or connector portions.

5. battery system according to any one of claim 1 to 4, wherein,

The circulation path has：Major cycle path, it is connected with the cooling body；And multiple branches, it is the plurality of Branch is connected from the major cycle forehearth limb and with the major cycle path,

The coolant come from cooling body circulation is shunted from the major cycle path to the branch, and in each heat exchanger Circulation.

6. battery system according to any one of claim 1 to 5, wherein,

The battery system also has the external shell for being used for storing multiple battery units and the multiple heat exchanger,

The heat exchanger has：Cooling tube, it is used to circulate the coolant；And coldplate, it is built-in with the cooling Pipe, the heat exchanger make the both ends of the cooling tube prominent from the coldplate and as making the coolant to the cooling The link end of the internal flow of pipe,

The coldplate is configured with the state of the monocell thermal with the battery unit and is accommodated in the external shell It is interior, also, the link end is run through the external shell, it is connected in the outside of the external shell and the branch.

7. battery system according to claim 6, wherein,

The heat exchanger makes the link end be protruded from the lower section of the coldplate, also, makes the link end through described The bottom surface of external shell, so that the bottom surface side in the external shell configures the circulation path.

8. battery system according to claim 7, wherein,

The battery system also has the babinet configured along the bottom surface of the external shell, and the babinet has the circulation is logical Road configures the recess in fixed position.

9. battery system according to claim 6, wherein,

The heat exchanger makes the link end be protruded from the top of the coldplate, also, makes the link end through described The top surface of external shell, so that the top surface side in the external shell configures the circulation path.

10. battery system according to claim 9, wherein,

The external shell has rhone in upper surface, and makes the rhone with downward towards the outside of the external shell Inclined mode tilts, so that from the coolant of the link end or circulation path leakage by the row Sink is discharged.

11. the battery system according to any one of claim 6 to 10, wherein,

The battery system has cap, which is used to cover to lead to along the circulation of the surface configuration of the external shell Road.

12. the battery system according to any one of claim 6 to 11, wherein,

The circulation path has coolant pipe, which is used to the multiple heat exchanger with the cooling body being connected Knot, also, the circulation path has connector portions, and which is used to the coolant pipe being linked to from the external shell Surface protrude the link end,

The connector portions have：Canister portion, it is for link end insertion；And fixinig plate, its outer circumferential surface from cartridge It is prominent,

The external shell has fixed part, and the fixed part is prominent from surface of shell and for the fixinig plate to be fixed,

By the way that the fixinig plate is fixed on the fixed part, so that the connector portions to be fixed on to the fixation of the external shell Position.

13. the battery system according to any one of claim 6 to 12, wherein,

The circulation path has coolant pipe, which is used to the multiple heat exchanger with the cooling body being connected Knot, and the coolant pipe has the fixinig plate protruded from outer circumferential surface,

By the way that the fixinig plate is fixed on the fixed part, so that the coolant pipe to be fixed on to the fixed bit of surface of shell Put.

14. the battery system according to any one of claim 6 to 13, wherein,

It is described link end be inserted into through hole arranged on the external shell and to the exterior prominent of the external shell,

Between the inner surface of the coldplate and the external shell, seal is configured with around the through hole, from And the heat exchanger and the external shell are connected into waterproof construction.

15. a kind of electric vehicle, its with the battery system any one of claim 1 to 14, wherein,

The battery system to for make vehicle travel motor supply electric power.