JP2012009388A - Battery pack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery pack which exhibits sufficient heat dissipation performance despite of its simple and compact structure.SOLUTION: In a battery pack 1, a supporting/cooling frame 3 is arranged between a pair of supporting frames 2 and 4, and rows 8R of multiple cylindrical battery cells 8 are sandwiched between the supporting/cooling frame 3 and the supporting frames 2 and 4 on both sides. Side plates are attached on both side faces in the width direction of the supporting frames 2 and 4 and the supporting/cooling frame 3, and both ends in the axial direction of the battery cells 8 are supported by the side plates. Heat transferred from the battery cells 8 to the supporting frames by the mutual contact with contact faces 2a to 2c, 3a to 3c and 4a to 4c is quickly transferred to the supporting/cooling frame 3. In the supporting/cooling frame 3, a coolant passage is formed by a cooling pipe 5 which penetrates through the frame in the longitudinal direction (battery row direction) at the center position in the width direction as well as in the thickness direction. The supporting/cooling frame 3 is cooled by the cooling pipe 5, and the supporting frames 2 and 4 are cooled via the supporting/cooling frame 3.

Description

  The present invention relates to an assembled battery, and more particularly, to an assembled battery including a frame body that holds a plurality of single cells.

  An assembled battery (assembled battery) obtains high voltage and high capacity by electrically connecting a plurality of secondary batteries (single cells) in series or in parallel. The cells in the assembled battery are connected in series and in parallel, for example, by welding the terminals to the terminal bus bar, or by fastening the terminal bus bar to a screw portion formed on the terminal. The single battery in the assembled battery is fixed without floating by being held by the insulating frame.

  When such an assembled battery is used in a product that requires high power, such as a power source for automobiles, the total number of cells is several tens, and the material inside the battery deteriorates due to self-heating during charging and discharging, Life may be reduced.

  The assembled battery of Patent Document 1 employs a configuration in which heat is taken directly from the battery surface by allowing cooling air to pass through the space of the unit cell defined by the holding member.

JP2007-73205A

  The assembled battery of Patent Document 1 is configured to take heat from the battery surface by passing cooling air through the space of the unit cell defined by the holding member of the assembled battery, in order to ensure gas fluidity. In addition, it is necessary to increase the spatial distance between these single cells, and the entire assembled battery becomes large.

(1) The assembled battery according to the invention of claim 1 is a first unit cell array in which a plurality of unit cells are arranged in a line, and the first unit cell array is contact-supported on one surface thereof and is internally provided therein. And a first support member having a cooling medium passage formed therein.
(2) The assembled battery according to the invention of claim 4 is hierarchically arranged with a first unit cell array in which a plurality of unit cells are arranged in a row, and a plurality of unit cells arranged in a row. A second cell array disposed on the surface, a double-sided support member that supports the first cell array and the second cell array on both sides, and has a refrigerant passage formed therein, and the double-sided support A first single-sided support member that sandwiches the first cell array with a member; and a second single-sided support member that sandwiches the second cell array with the double-sided support member. It is characterized by.
(3) The assembled battery according to the invention of claim 5 is hierarchically arranged with a first unit cell row in which a plurality of unit cells are arranged in a row, and the first unit cell row in which a plurality of unit cells are arranged in a row. 2nd and 3rd single cell row | line | column arrange | positioned by this, and the said 1st single cell row | line | column and the 2nd single cell row | line | column are supported on both surfaces, and the 1st double-sided support by which the refrigerant path was formed in the inside The first unit cell array between the member, a second double-sided support member that supports the second unit cell array and the third unit cell array on both sides, and the first double-sided support member A third single cell row is sandwiched between the first single-sided support member to be sandwiched and the second double-sided support member, and provided with a second single-sided support member member in which a refrigerant passage is formed. It is characterized by.
(4) The battery pack according to the invention of claim 6 is hierarchically arranged with a first unit cell row in which a plurality of unit cells are arranged in a row, and the first unit cell row in which a plurality of unit cells are arranged in a row. 1st double-sided support which supported the 2nd-4th single cell row arranged in the above, the 1st single cell row, and the 2nd single cell row on both sides, and formed a refrigerant passage inside A member, a second double-sided support member for supporting the second cell array and the third cell array on both sides, and a support for the third cell array and the fourth cell array on both sides A third single-sided support member having a coolant passage formed therein, a first single-sided support member that sandwiches the first cell array between the first double-sided support member, and the third And a second single-sided support member that sandwiches the fourth cell array with the double-sided support member.

  ADVANTAGE OF THE INVENTION According to this invention, the assembled battery which has sufficient heat dissipation performance can be provided, although it is simple and small.

The block diagram which shows an example of the electric vehicle to which the assembled battery by this invention is applied. The perspective view which shows the external appearance of 1st Embodiment of the assembled battery by this invention. The exploded perspective view of the assembled battery of FIG. The longitudinal cross-sectional view of the assembled battery of FIG. The longitudinal cross-sectional view which shows 2nd Embodiment of the assembled battery by this invention. The longitudinal cross-sectional view which shows 3rd Embodiment of the assembled battery by this invention. The longitudinal cross-sectional view which shows 4th Embodiment of the assembled battery by this invention. The longitudinal cross-sectional view which shows 5th Embodiment of the assembled battery by this invention. The top view which shows 6th Embodiment of the assembled battery by this invention. The longitudinal cross-sectional view which follows the AA arrow line of FIG. The top view which shows 7th Embodiment of the assembled battery by this invention. The top view which shows 8th Embodiment of the assembled battery by this invention. The disassembled perspective view which shows 9th Embodiment of the assembled battery by this invention. The longitudinal cross-sectional view of the assembled battery of FIG. The front view which shows the assembled battery assembly which assembled the assembled battery of the Example of this invention.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In the embodiments described below, a case where the battery control device and the power storage device according to the present invention are applied to a drive system for a hybrid vehicle will be described. The configuration of the embodiment described below can also be applied to a railway vehicle such as a hybrid train. The battery control device and the power storage device according to the present invention can also be applied to an electric vehicle.

<Schematic configuration of hybrid vehicle drive system>
First, a hybrid vehicle drive system will be described with reference to FIG. In the drive system of the hybrid vehicle 201 shown in FIG. 1, an axle 203 mechanically connected to drive wheels 202 is connected to a differential gear 204, and an input shaft of the differential gear 204 is connected to a transmission 205. And it is input to the transmission 205 via a driving force switching device 208 that switches the driving force of the engine 206 that is an internal combustion engine and the motor generator 207 as a driving source.

  In FIG. 1, a so-called parallel hybrid system in which an engine 206 and a motor generator 207 are arranged in parallel as a drive source of the drive wheels 202 is employed. In the hybrid vehicle drive system, the energy of the motor generator 207 is used as the drive source of the drive wheels 202, and the energy of the engine 206 charges the drive source of the motor generator 207, that is, the capacitor. There is a hybrid system, and the present invention can employ both of these systems or a combined system.

  A power storage device 211 that is a power supply device is electrically connected to the motor generator 207 via a power conversion device 209. The power conversion device 209 is controlled by the control device 10.

  When the motor generator 207 is operated as a motor, the power conversion device 209 functions as a DC-AC conversion circuit that converts DC power output from the power storage device 211 into three-phase AC power. Further, when the motor generator 207 is operated as a generator during regenerative braking, the power converter 209 functions as an AC-DC converter circuit that converts the three-phase AC power output from the motor generator 207 into DC power. To do. The positive and negative terminals of the module battery of the power storage device 211 are electrically connected to the DC side of the power conversion device 209. On the AC side of the power converter 209, there is a three series circuit composed of two switching semiconductor elements, and three phase windings of the armature winding of the motor generator 207 are in the middle of the two switching semiconductor elements of the series circuit. Are electrically connected.

  The motor generator 207 functions as a prime mover for driving the drive wheels 205, and includes an armature (stator) and a field (rotor) disposed opposite to the armature and rotatably held. This is a permanent magnet field type three-phase AC synchronous rotating electric machine using the magnetic flux of the permanent magnet as a field. The motor generator 207 drives the drive wheels 205 based on the magnetic action of a rotating magnetic field formed by three-phase AC power supplied to the armature winding and rotating at a synchronous speed, and the magnetic flux of the permanent magnet. Generates the rotational power required for

  When the motor generator 207 is driven as a motor, the armature receives a supply of three-phase AC power controlled by the power converter 209 and generates a rotating magnetic field. On the other hand, when the motor generator 9 is driven as a generator, the armature becomes a part that generates three-phase AC power by interlinking of magnetic flux, and an armature core (stator core) that is a magnetic body and an armature core. And a three-phase armature winding (stator winding). The field is a part that generates a field magnetic flux when the motor generator 207 is driven as an electric motor or a generator. A field core (rotor core) that is a magnetic body and a permanent that is attached to the field core. And a magnet.

  The motor generator 207 is based on the magnetic action of a rotating magnetic field formed by three-phase AC power supplied to the armature winding and rotating at a synchronous speed, and a magnetic flux generated by exciting the winding. A winding field type three-phase AC synchronous rotating electric machine or a three-phase AC induction rotating electric machine that generates In the case of a wound field type three-phase AC synchronous rotating electric machine, the configuration of the armature is basically the same as that of a permanent magnet field type three-phase AC synchronous rotating electric machine. On the other hand, the configuration of the field is different, and a field winding (rotor winding) is wound around a field iron core that is a magnetic material. In a wound field type three-phase AC synchronous rotating electric machine, a permanent magnet may be attached to a field core around which a field winding is wound to suppress leakage of magnetic flux due to the winding. The field winding generates a magnetic flux when excited by receiving a field current from an external power source.

  An axle 203 of the drive wheel 202 is mechanically connected to the motor generator 207 via a drive force switching device 208, a transmission 205, and a differential gear 204. The transmission 205 changes the rotational power output from the motor generator 207 and transmits it to the differential gear 204. The differential gear 204 transmits the rotational power output from the transmission 205 to the left and right axles 203. The driving force switching device 208 is switched by a host control device (not shown) such as engine control and travel control, and is accelerated by engine control, engine start by the motor generator 207 from idle stop, and regenerative brake coordination in brake control. It is made to operate as an electric motor or a generator by switching.

  The power storage device 211 charges the electric power generated when the motor generator 207 is regenerated as its own driving power, and when driving the motor generator 207 as a generator, the driving on-vehicle that discharges the electric power necessary for this driving. It is a power supply. For example, it is an assembled battery composed of several tens of lithium ion batteries so as to have a rated voltage of 100 V or more. The detailed configuration of the power storage device 211 will be described later.

  The power storage device 211 includes, in addition to the motor generator 207, an electric actuator that supplies power to a vehicle-mounted auxiliary device (for example, a power steering device, an air brake), a rated voltage lower than that of the power storage device 211, , Audio, on-vehicle electronic control device) is electrically connected via a DC / DC converter. The DC / DC converter is a step-up / step-down device that steps down the output voltage of the power storage device 211 and supplies it to an electric actuator or a low-voltage battery, or boosts the output voltage of the low-voltage battery and supplies it to the power storage device 211 or the like. . A lead battery with a rated voltage of 12V is used as the low voltage battery. As the low voltage battery, a lithium ion battery or a nickel metal hydride battery having the same rated voltage may be used.

  When the hybrid vehicle 201 is powered (starting, accelerating, normal traveling, etc.), when a positive torque command is given to the control device 10 and the operation of the power conversion device 209 is controlled, the DC power stored in the power storage device 211 is It is converted into three-phase AC power by the power converter 209 and supplied to the motor generator 207. As a result, the motor generator 207 is driven to generate rotational power. The generated rotational power is transmitted to the axle 203 through the driving force switching device 208, the transmission 205, and the differential gear 204, and drives the driving wheels 202.

  When the hybrid vehicle 201 is regenerated (deceleration, braking, etc.), when a negative torque command is given to the control device 10 to control the operation of the power conversion device 209, the motor generator driven by the rotational power of the drive wheels 202 Three-phase AC power generated from 207 is converted into DC power and supplied to the power storage device 211. Thereby, the converted DC power is charged in the power storage device 211.

  The control device 10 calculates a current command value from a torque command value output from a host control device (not shown), and determines a voltage based on a difference between the current command value and an actual current flowing between the power conversion devices 209. The command value is calculated, a PWM (pulse width modulation) signal is generated based on the calculated voltage command value, and the PWM signal is output to the power converter 209.

  Next, an embodiment of an assembled battery according to the present invention will be described with reference to the drawings.

[First Embodiment]
As shown in FIGS. 2 to 4, the assembled battery 1 includes a plurality of cylindrical unit cells 8, and each of the plurality of unit cells 8 includes a pair of single-side support frames 2 and 4 and a support / cooling frame 3. Is retained. A plurality of (for example, six) unit cells 8 are arranged on both sides of the support / cooling frame 3 so that the centers thereof are arranged in a straight line, and the single-side support frames 2, 4 have a semicylindrical surface of the unit cell 8. Are formed, and on both sides of the support / cooling frame 3, similar semi-cylindrical storage grooves 3d are formed.

  The single-sided support frames 2 and 4 and the support / cooling frame 3 have a rectangular planar shape whose longitudinal direction is the direction along the row of unit cells 8 (referred to as the unit cell row 8R). Bolts 9 are inserted into the end portions in the width direction at both longitudinal ends and the center portion of the upper single-side support frame 2 and the support / cooling frame 3, and the bolts 9 are screwed into the lower single-side support frame 4. Yes. Thus, the single-sided support frames 2 and 4 are connected to the support / cooling frame 3, and each unit cell 8 is stored in the storage space 20 formed by the storage grooves 2 d and 3 d and in the storage formed by the storage grooves 4 d and 3 d. It is accommodated in the space 20, and the outer peripheral surface is supported and held by the accommodating grooves 2d, 3d, and 4d of the frames 2, 3, and 4. In other words, the first and second unit cell rows 8R arranged hierarchically are sandwiched between the pair of support members 3 and 3 and 4.

  Side plates 6a and 7a are mounted on both side surfaces in the width direction of the single-sided support frames 2 and 4 and the support / cooling frame 3 by bolts 6c, and both end portions in the axial direction of the unit cell 8 are supported by the side plates 6a and 7a. ing.

  Before the assembly to the single-sided support frames 2, 4 and the support / cooling frame 3, a terminal bus bar 6 b connected to the positive and negative electrodes of the unit cell 8 is mounted on the side plate 6 a in advance. Composed. Before the assembly to the single-sided support frames 2, 4 and the support / cooling frame 3, a terminal bus bar 7 b connected to the positive and negative electrodes of the unit cell 8 is mounted on the side plate 7 a in advance. Composed. The side plates 6a and 7a are formed with recesses 6d and 7d into which both ends of the unit cell 8 in the axial direction are fitted, and the positive and negative electrode connection positions of the unit cell 8 are set with respect to the terminal bus bars 6b and 7b.

  The single-sided support frames 2 and 4 and the support / cooling frame 3 are made of a material having good heat conductivity, such as aluminum or a resin having high heat conductivity, and are formed by die casting or molding. The side plates 6a and 7a are made of an insulating material such as resin and are molded.

  The cylindrical outer peripheral surface of the unit cell 8 is in close contact with the storage grooves 2d, 3d, and 4d while being covered with the resin sheet 8a. The resin sheet 8a is formed of a resin having good thermal conductivity and insulation, the unit cell 8 is insulated from the single-sided support frames 2, 4 and the support / cooling frame 3, and the heat of the unit cell 8 is single-sided. It is transmitted to the support frames 2, 4 and the support / cooling frame 3. Therefore, it is preferable to employ a material having high thermal conductivity for the resin sheet 8a.

  The upper single-sided support frame 2 is formed with contact surfaces 2a, 2b, and 2c that contact the support / cooling frame 3 at both ends and the center in the longitudinal direction, and the lower-side single-sided support frame 4 has both ends and the center in the longitudinal direction. Contact surfaces 4a, 4b, and 4c that contact the support / cooling frame 3 are formed in the part. The support / cooling frame 3 is formed with contact surfaces 3a, 3b, and 3c that contact the contact surfaces 2a and 4a, the contact surfaces 2b and 4b, and the contact surfaces 2c and 4c, respectively. The heat transferred from the unit cell 8 to the single-sided support frames 2 and 4 by the mutual contact of the contact surfaces 2a to 2c and 3a to 3c and the mutual contact of the contact surfaces 2a to 2c and 4a to 4c is quickly supported and cooled. 3 is transmitted.

  As shown in FIGS. 2 to 4, the support / cooling frame 3 has a cooling pipe 5 penetrating in the longitudinal direction (unit cell arrangement direction) at the center in the width direction and in the center in the thickness direction. A refrigerant passage is provided. Cooling water flows in the cooling pipe 5 as a refrigerant in one direction or in both directions. As a result, the support / cooling frame 3 is cooled, and the single-sided support frames 2, 4 are cooled via the support / cooling frame 3.

  The cooling pipe 5 is manufactured separately from the support / cooling frame 3 by a corrosion-resistant material such as stainless steel, and is inserted when the support / cooling frame 3 is cast, or is pressed and fixed after casting. The cooling pipe 5 is in close contact with the support / cooling frame 3 to cool the support / cooling frame 3 with good cooling efficiency.

  The cooling pipe 5 is formed with an enlarged diameter portion 51E and both end portions 52E at portions contacting the both longitudinal end surfaces of the support / cooling frame 3. The enlarged diameter portion 51E serves to prevent the cooling pipe 5 from coming off the support / cooling frame 3, and the enlarged diameter portion 52E serves to prevent the resin hoses 11 and 110 shown in FIG. The enlarged diameter portions 51E and 52E are formed by shrinking a stainless steel pipe.

  When the assembled battery 1 shown in FIGS. 2 to 4 is used as an in-vehicle power storage device for an electric vehicle or a hybrid electric vehicle, the assembled battery 1 is used as an assembled battery assembly.

  The assembled battery assembly stores a plurality of assembled batteries 1 in a housing 10 arranged in, for example, three vertical rows and two horizontal rows, and each assembled battery 1 is fixed to the housing 10 with a bolt or the like. . Two assembled batteries 1 are connected in series in the longitudinal direction, and the cooling pipes 5 and 5 of the assembled batteries 1 and 1 connected in series are connected to each other by a resin hose 11. One end opposite to the end to which the resin hose 11 is connected is the introduction side, and the other end is the discharge side. On the introduction side, the introduction side resin hose 110A is connected to the cooling pipe 5 and discharged. On the side, a discharge side resin hose 110 </ b> B is connected to the cooling pipe 5.

  The cooling water is introduced into one cooling pipe 5 from the introduction side resin hose 12 </ b> A, and is led from the cooling pipe 5 through the resin hose 11 to the serial cooling pipe 5. Thereafter, the cooling pipe 5 is discharged to the discharge side resin hose 110B. Thereby, all the single cells 8 in the assembled battery assembly can be cooled with good cooling efficiency.

  Note that a battery controller 13 that controls the assembled battery 1 and a relay unit 14 that is a safety device are housed in the housing 10 and connected to the assembled battery 1.

According to the assembled battery described above, the following operational effects can be achieved.
(1) Each unit cell 8R of the unit cell array 8R is supported by the cooling / supporting frame 3 that itself is cooled by the refrigerant having the refrigerant passage, so that a useless space for circulating the cooling air is formed. The single battery 8 can be efficiently cooled, and the assembled battery 1 can be downsized.

(2) One cell array 8R is sandwiched between a pair of support frames 2 and 3, and the other cell array 8R is sandwiched between a pair of support frames 3 and 4. Since the pair of support frames 2 and 3 and the pair of support frames 3 and 4 have contact surfaces 2a to 2c, 3a to 3c, and 4a to 4c that are in contact with each other, they are cooled and supported from the support frames 2 and 4 through the contact surfaces. Since heat transfer is performed to the frame 3, the single cell 8 is effectively cooled.

(3) Since the cooling pipe 5 is formed of a corrosion-resistant material that is separate from the support / cooling frame 3, sufficient corrosion resistance can be ensured, and the support / cooling frame 3 can be lightened. Can do. If a cooling pipe is formed in the support / cooling frame 3 by drilling, it is necessary to consider casting defects such as voids in the support / cooling frame 3, but it is easy to stabilize the quality by making it separate. It is.

(4) Since the cooling pipe 5 is disposed along the unit cell row 8R, all the unit cells 8 can be cooled evenly and efficiently. Further, the cooling pipe 5 is embedded in the thickness of the support / cooling frame 3, and it is not necessary to provide a separate refrigerant passage, so that the assembled battery 1 is configured simply and in a small size. That is, by bringing the unit cell 1 into close contact with the support / cooling frame 3 along the unit cell row 8R, the assembled cell 1 has sufficient heat dissipation performance while being simple and small.

[Second Embodiment]
Next, 2nd Embodiment of the assembled battery by this invention is described with reference to FIG. In the figure, the same or corresponding parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  In the second embodiment, one lower single-sided support frame 4 in the first example is omitted, and the storage groove 3d that forms the storage space 20 between the support / cooling frame 3 and the lower single-sided support frame 4 is provided. The support / cooling frame 30 in which is omitted is adopted.

  As shown in FIG. 5, the support / cooling frame 30 has half the thickness of the first embodiment, and the storage groove 3 d is formed only on the surface facing the upper single-side support frame 2. The unit cell row 8R is stored and held in a storage space 20 formed by the storage groove 2d of the upper single-side support frame 2 and the storage groove 3d of the support / cooling frame 30. A cooling pipe 50 similar to the cooling pipe 5 of the first embodiment is embedded in the support / cooling frame 30.

  The assembled battery according to the second embodiment has the same effects as those of the first embodiment in the assembled battery 1 including a smaller number of unit cells 8.

[Third Embodiment]
Next, a third embodiment of the assembled battery according to the present invention will be described with reference to FIG. In the figure, the same or corresponding parts as those in the first and second embodiments are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 6, the assembled battery of the third embodiment has first to third unit cell rows 8R. The assembled battery 1 employs a lower double-side support frame 40 in which housing grooves 4d are formed on both sides in the thickness direction, instead of the lower single-side support frame 4 of the first embodiment. Further, the support / cooling frame 30 employed in the assembled battery of the second embodiment is disposed further below the lower double-sided support frame 40. That is, the assembled battery 1 is configured by sequentially arranging the upper single-sided support frame 2, the first support / cooling frame 3, the double-sided support frame 40, and the second support / cooling frame 30.

  The first to third cell rows 8R, in other words, the upper, middle, and lower three-tier cell cells 8R are formed by the storage grooves 2d of the upper single-side support frame 2 and the storage grooves 3d of the first support / cooling frame 3. Storage space 20 formed by the storage space 20 formed, the storage groove 4d inside the double-sided support frame 40 and the storage groove 3d of the second support / cooling frame 3, and the storage groove 4d outside the double-sided support frame 40 It is stored and held in the storage space 20 formed by the storage groove 3d of the second support / cooling frame 30, respectively.

  In the third embodiment, the single cells 8 of the cell array 8R on both surfaces thereof are cooled by the first support / cooling frame 3, and the single cells along the second support / cooling frame 30 are cooled by the second support / cooling frame 30. The single cells 8 in the row 8R are cooled.

  The double-sided support frame 40 is formed with contact surfaces 40A, 40b, 40c that contact the first support / cooling frame 3 at both ends and the center in the longitudinal direction, and the second support / cooling frame 30 has both ends in the longitudinal direction. Contact surfaces 30A, 30b, and 30c that contact the cooling frame 40 are formed at the center and the center. Thus, the support frame 2 is removed from the unit cell 800 by mutual contact of the contact surfaces 2a-2c, 3a-3c, mutual contact of the contact surfaces 3a-3c, 40a-40c, and mutual contact of the contact surfaces 40aA-40c, 30a-30c. , 40 is immediately transferred to the first and second support / cooling frames 3, 30.

  3rd Embodiment has the same effect as 1st Embodiment in the assembled battery 1 provided with many single cells 8 from 1st Embodiment.

[Fourth Embodiment]
Next, a fourth embodiment of the assembled battery according to the present invention will be described with reference to FIG. In the figure, the same or corresponding parts as those in the first to third embodiments are denoted by the same reference numerals, and description thereof is omitted.

  The fourth embodiment employs the support / cooling frame 3 of the first embodiment in place of the second support / cooling frame 30 of the third embodiment, and further a cell array below the support / cooling frame 3. 8R is arranged, and further, a single-sided support frame 4 similar to that of the first embodiment is arranged below the unit cell row 8R.

As shown in FIG. 7, the assembled battery 1 of the fourth embodiment includes first to fourth unit cell rows 8R. The assembled battery 1 includes the same combination of the single-sided support frame 2 and the support / cooling frame 3 as in the first embodiment, and the combination of the support / cooling frame 3 and the single-sided support frame 4 according to the third embodiment. It is the thing which piled up on both sides.
In the fourth embodiment, the cells 8 of the cell array 8R on both sides are cooled by the pair of support / cooling frames 3.

  4th Embodiment has the same effect as 1st Embodiment in the assembled battery 1 provided with many single cells 8 from 3rd Embodiment.

[Fifth Embodiment]
Next, a fifth embodiment of the assembled battery according to the present invention will be described with reference to FIG. In addition, in the figure, the same code | symbol is attached | subjected to the same or equivalent part as 1st-4th embodiment, and description is abbreviate | omitted.

  In the first to fourth embodiments, the inner diameters of the cooling pipes 5 and 50 are constant. However, as shown in FIG. 8, the fifth embodiment gradually reduces the inner diameter toward the downstream side (discharge side). The cooling pipe 500 is applied to the support / cooling frame 3. In the figure, the direction of the refrigerant flow is indicated by an arrow F. Since the cooling water has the lowest temperature upstream (introduction side) and increases in temperature toward the downstream, the cooling effect is reduced toward the downstream when the flow rate is constant. On the other hand, when the inner diameter is decreased toward the downstream, the flow velocity increases toward the downstream and the Reynolds number is increased, so that the heat transfer rate is increased. Thereby, a uniform cooling effect is obtained over the entire length of the cooling pipe 500.

  Needless to say, the cooling pipe 500 having a gradually reduced inner diameter can be applied not only to the support / cooling frame 3 but also to the support / cooling frame 30.

[Sixth Embodiment]
Next, a sixth embodiment of the assembled battery according to the present invention will be described with reference to FIGS. In the figure, the same or corresponding parts as those in the first to fifth embodiments are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIGS. 9 and 10, the sixth embodiment employs a cooling pipe 51 that meanders in the width direction of the support / cooling frame 3. Thereby, compared with 1st-5th embodiment, the contact area of the cooling pipe 51 and the support and the cooling frame 3 increases, and it can improve a cooling effect.

[Seventh Embodiment]
Next, a seventh embodiment of the assembled battery according to the present invention will be described with reference to FIG. In the figure, the same or corresponding parts as those in the first to fifth embodiments are denoted by the same reference numerals and description thereof is omitted.

As shown in FIG. 11, the seventh embodiment employs a cooling pipe 52 of a reciprocating path from the start end in the longitudinal direction of the support / cooling frame 3 to the end, and then returns to the start end.
Thereby, compared with 1st-5th embodiment, the contact area of the cooling pipe 52 and the support and the cooling frame 3 increases, and it can improve a cooling effect.

[Eighth Embodiment]
Next, an assembled battery according to an eighth embodiment of the present invention will be described with reference to FIG. In the figure, the same or corresponding parts as those in the first to fifth embodiments are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 12, the eighth embodiment employs a cooling pipe 53 that is bifurcated between the introduction side and the discharge side of the support / cooling frame 3. By such branching and merging, the contact area between the cooling pipe 53 and the support / cooling frame 3 is increased as compared with the first to fifth embodiments, and the cooling effect can be enhanced.

[Ninth Embodiment]
Next, a ninth embodiment of an assembled battery according to the present invention will be described with reference to FIGS. In the figure, the same or corresponding parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  The unit cell 8 of the first to eighth embodiments is cylindrical, but the ninth embodiment relates to a flat-cell unit cell 800.

  As shown in FIGS. 13 and 14, the assembled battery 100 is configured by sequentially arranging an upper single-sided support frame 200, a first support / cooling frame 300, a double-sided support frame 400, and a second support / cooling frame 301. The first and second support / cooling frames 300 and 301 are provided with cooling pipes 501. The cell array 800R includes a storage space 220 formed by the storage groove 200d of the upper single-side support frame 200 and the storage groove 300d of the first support / cooling frame 300, and an upper storage groove 400d and a second support of the double-side support frame 400. A storage space 220 formed by the storage groove 300d of the cooling frame 300, a storage space 220d formed by the storage groove 400d below the double-sided support frame 400 and the storage groove 301d of the second support / cooling frame 301, Each is stored and held.

  In the cell array 800R, the cells 800 are arranged so that the thickness direction centers thereof are arranged in a straight line, and the thickness of the assembled battery 100 is minimized. The support frames 200 and 400 are formed with rectangular storage grooves 200d and 400d that are ½ the thickness of the unit cell 800, and the first and second support / cooling frames 300 and 301 have the same rectangular shape. The shape storage grooves 300d and 301d are formed.

  The support frames 200 and 400 and the support / cooling frames 300 and 301 have a rectangular planar shape whose longitudinal direction is the direction along the cell array 800R. Bolts 900 are inserted into the end portions in the width direction at both ends in the longitudinal direction of the support frames 200 and 400 and the support / cooling frames 300 and 301, and the bolts 900 are fastened and fixed by nuts 901. Accordingly, the support frames 200 and 400 and the support / cooling frames 300 and 301 are connected to each other, and each unit cell 800 is formed in the storage space 220 formed by the storage grooves 200d and 300d and by the storage grooves 400d and 301d. Is stored in the storage space 220 to be supported and supported in the thickness direction.

  Side plates 600 and 700 are mounted by bolts (not shown) on both sides in the width direction of the support frames 200 and 400 and the support / cooling frames 300 and 301, and both end portions in the axial direction of the unit cell 800 are side plate assemblies. It is supported by side plates 600A and 700A in 600 and 700.

  Before the assembly to the support frames 200, 400 and the support / cooling frames 300, 301, terminal bus bars (not shown) connected to the positive and negative electrodes of the unit cell 800 are mounted on the side plate 600A in advance. It is configured as an assembly 600. Before the assembly to the support frames 200, 400 and the support / cooling frames 300, 301, terminal bus bars (not shown) connected to the positive and negative electrodes of the unit cell 800 are mounted on the side plate 700A in advance. It is configured as an assembly 700.

  The support frames 200 and 400, the support / cooling frames 300 and 301, and the side plates 600A and 700A are formed by the same material and manufacturing method as the support frames 2 and 4, the support / cooling frame 3, and the side plates 6a and 7a. The outer peripheral surface of the unit cell 800 is covered with a resin sheet 800A similar to the resin sheet 8a, and is in close contact with the housing grooves 200d, 300d, 301d, and 400d, thereby ensuring thermal conductivity and insulation.

  The support frame 200 is formed with contact surfaces 200A, 200b, and 200c that are in contact with the support / cooling frame 300 at two longitudinal ends and a central portion. The double-sided support frame 400 has both longitudinal ends and a central portion. Contact surfaces 400A, 400b, and 400c that contact the support / cooling frames 300 and 301 are formed at two locations. Contact surfaces 300A, 300b, 300d, 301A, 301b, and 301c are formed on the support / cooling frames 300 and 301, respectively, to contact the contact surfaces 200A and 400A, the contact surfaces 200b and 400b, and the contact surfaces 200c and 400c. The contact cells 200a to 200c, 300a to 300c, mutual contact of the contact surfaces 300a to 300c, 400a to 400c, and mutual contact of the contact surfaces 400a to 400c and 301a to 301c, the unit cell 800 to the support frames 200 and 400. The transmitted heat is immediately transmitted to the support / cooling frames 300 and 301.

  In the ninth embodiment, the flat rectangular unit cell 800 has sufficient heat dissipation performance while being simple and small.

  The assembled battery 100 of the present embodiment accommodates the three cell arrays 800R, but the support frame and cooling / support frame of the present embodiment are the same as the support frame, cooling / support frame, and second of the first embodiment. By applying the support frame, the cooling / support frame of the embodiment, the support frame of the fourth embodiment, and the cooling / support frame, respectively, an assembled battery of two rows, one row, and four rows of flat rectangular cell arrays is formed. Thus, the same effects as those of the first, second, and fourth embodiments can be obtained. Furthermore, it is naturally possible to adopt the configuration of the cooling pipes of the fifth to eighth embodiments in the present embodiment and such assembled batteries having different numbers of unit cells.

[Modification]
In the first to fourth embodiments, six unit cells 8 are included in the unit cell array 8R, but the present invention can be applied to a unit cell array including a smaller number or a larger number of unit cells.

  In the ninth embodiment, three unit cells 800 are included in the unit cell array 800R. However, the present invention can be applied to a unit cell array including a smaller number or a larger number of unit cells.

  In the above embodiment, the assembled battery for the cylindrical and flat rectangular unit cells has been described, but the present invention can be applied to a unit cell of a laminate or other shape.

  The fifth to eighth embodiments show examples of the configuration for improving the heat transfer of the cooling pipe in the cooling / supporting frame, but any known configuration for improving the heat transfer coefficient and the contact area is used. Can be adopted.

  In the above embodiment, a cooling pipe separate from the cooling / supporting frame is adopted, but it is naturally possible to cool the cooling / supporting frame by forming a coolant passage in the cooling / supporting frame by drilling. .

  In the above embodiment, the cells in the cell array are arranged in a straight line, but the present invention can be applied to cell arrays in various arrangement forms such as an arc shape, an L shape, and a U shape.

  In the eighth embodiment, the cooling pipe 53 is bifurcated and merged, but it is of course possible to have three or more branches.

1: assembled battery 2, 4, 200: support frame 2A-2c, 3a-3c, 4a-4c, 30a-30c, 40a-40c, 200A-200c, 300A-300c, 301A-301c, 400A-400c: contact surface 2d, 200d: storage groove 3, 30, 300, 301: support / cooling frame 3d, 300d, 301d: storage groove 40, 400: double-sided support frame 4d, 400d: storage 5, 50, 51, 52, 53, 501: Cooling pipes 6, 7, 600, 700: Side plate assemblies 6a, 7a, 600a, 700a: Side plates 6b, 7b: Terminal bus bars 6d, 7d: Recesses 8, 800: Single cells 8A, 800A: Resin sheets 8R, 800R : Cell array 9: Bolt 10: Housing 11, 110: Resin hose 12: External pipe 13: Battery controller 14: Relay Unit 20, 220: housing space 51E, 52E: enlarged diameter portion 901: Nut

Claims (14)

A first cell array in which a plurality of cells are arranged in a line;
A battery assembly comprising: a first support member member that supports the first cell array in contact with one surface thereof and has a cooling medium passage formed therein. The assembled battery according to claim 1,
An assembled battery comprising: a second support member that sandwiches the first cell array with the first support member member while being in contact with the other surface of the cell. The assembled battery according to claim 2,
The assembled battery according to claim 1, wherein the first support member and the second support member have contact surfaces that contact each other and transfer heat to each other. A first cell array in which a plurality of cells are arranged in a line;
A plurality of unit cells arranged in a row, a second unit cell column arranged hierarchically with the first unit cell column;
A double-sided support member that supports the first cell row and the second cell row on both sides, and has a refrigerant passage formed therein;
A first single-sided support member that sandwiches the first cell array with the double-sided support member;
An assembled battery comprising a second single-sided support member that sandwiches the second cell array with the double-sided support member. A first cell array in which a plurality of cells are arranged in a line;
A plurality of unit cells arranged in a row, the second and third unit cell rows arranged hierarchically with the first unit cell row;
A first double-sided support member that supports the first cell row and the second cell row on both sides, and in which a refrigerant passage is formed;
A second double-side support member that supports the second cell array and the third cell array on both sides;
A first single-sided support member that sandwiches the first cell array with the first double-sided support member;
An assembled battery comprising a second single-sided support member member that sandwiches the third cell array with the second double-sided support member and has a refrigerant passage formed therein. A first cell array in which a plurality of cells are arranged in a line;
A plurality of unit cells arranged in a row, the second to fourth unit cell rows arranged hierarchically with the first unit cell row;
A first double-sided support member that supports the first cell row and the second cell row on both sides, and in which a refrigerant passage is formed;
A second double-side support member that supports the second cell array and the third cell array on both sides;
A third double-sided support member that supports the third cell row and the fourth cell row on both sides, and has a refrigerant passage formed therein;
A first single-sided support member that sandwiches the first cell array with the first double-sided support member;
An assembled battery, comprising: a second single-sided support member that sandwiches the fourth cell array with the third double-sided support member. The assembled battery according to any one of claims 1 to 6,
The assembled battery, wherein the refrigerant passage extends linearly in the direction in which the single cells are arranged inside the support member. The assembled battery according to claim 7,
The assembled battery, wherein the refrigerant passage has a smaller cross-sectional area toward the downstream. The assembled battery according to any one of claims 1 to 6,
The assembled battery, wherein the refrigerant passage meanders inside the support member. The assembled battery according to any one of claims 1 to 6,
The assembled battery is characterized in that the refrigerant passage has an outward path extending linearly in the direction in which the cells are arranged inside the support member, and a return path that makes a U-turn in the outward path. The assembled battery according to any one of claims 1 to 10,
The unit cell is a cylindrical type, and the unit cells are arranged so that their central axes are arranged in a straight line. The assembled battery according to any one of claims 1 to 10,
The unit cell has a flat rectangular shape, and the unit cell is arranged in a straight line so that the side surfaces thereof face each other. The assembled battery according to any one of claims 1 to 12,
The assembled battery, wherein the refrigerant passage is formed by a cooling pipe separate from the support member, and the cooling pipe is embedded in the support member. The assembled battery according to any one of claims 1 to 13,
The unit cell is covered with a resin sheet having insulating properties and thermal conductivity.

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