JP3891860B2 - Collective battery and battery system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an assembled battery and a battery system, and more particularly to an assembled battery and a battery system mounted on a vehicle using an electric motor such as an electric vehicle as a drive source.
[0002]
[Prior art]
In recent years, an electric vehicle using an electric motor as a drive source and a so-called hybrid car having a plurality of types of drive sources such as an electric motor and a gasoline engine have been put into practical use. Such an electric vehicle or the like is equipped with a battery for supplying electricity as energy to an electric motor or the like. As this battery, a secondary battery such as a nickel-cadmium battery (Ni-Cd battery) or a nickel-hydrogen battery that can be repeatedly charged and discharged is used. An example of a battery system including such a battery will be described with reference to FIGS. FIG. 7 is a schematic perspective view showing a conventional battery system mounted on an automobile. FIG. 8 is a developed schematic view of a battery pack portion constituting the battery system shown in FIG. 9 is a schematic cross-sectional view of the battery pack portion taken along line IX-IX in FIG. 10 is a schematic cross-sectional view of the battery pack portion taken along line XX in FIG.
[0003]
As shown in FIGS. 7 to 10, a conventional battery system used as an energy source for driving a car is arranged between rear tires of a car and includes a module assembly in which a plurality of battery modules are stacked. A pack portion 105, a blower fan 131 for sending cooling air for cooling the battery to the battery pack portion 105, an exhaust duct 130 for discharging cooling air exhausted from the battery pack portion 105 to the outside of the vehicle, and for controlling the battery system Battery computer (not shown).
[0004]
As shown in FIG. 8, the battery pack portion 105 of the battery system shown in FIG. 7 has a structure in which a module assembly 111 is accommodated inside an exterior member composed of a battery cover 106 and a lower case 112. The module assembly 111 is formed by stacking a plurality of battery modules 122. A gap as a cooling air flow path is formed between the stacked battery modules 122 so that the cooling air can be circulated. Spacer convex portions 121 a to 121 e (see FIG. 9) that act as spacers for forming the gap are formed on the side wall of the battery module 122 that faces another adjacent battery module 122. Restraint plates 110 a and 110 b are disposed at both ends of the module assembly 111. The restraint plates 110a and 110b are connected and fixed to each other by restraint pipes 108a and 108b. The restraining plates 110a and 110b are fixed to the lower case 112. Each battery module 122 is also fixed to the lower case 112.
[0005]
Terminals 116 for charging / discharging current in the battery modules are formed on the respective side surfaces of the battery modules constituting the module assembly 111. In order to connect the terminals 116 of the battery module to each other, bus bar modules 109 a and 109 b are arranged on the side surface of the module assembly 111. The bus bar modules 109 a and 109 b are connected to the respective terminals 116 of the battery module 122, whereby the battery modules 122 are electrically connected in series in the module assembly 111.
[0006]
On the upper surface of the module assembly 111, an exhaust hose 107 for exhausting hydrogen gas or the like exhausted from the battery module 122 to the outside of the battery pack portion 105 is installed. The exhaust hose 107 is connected to the exhaust terminal 115 of the battery module 122. A temperature sensor 113 for measuring the temperature of the module assembly 111 is disposed on the upper surface of the module assembly 111. In accordance with the output of the temperature sensor 113, cooling air is supplied to the battery pack portion 105 using the blower fan 131 (see FIG. 7) in order to keep the temperature of the module assembly 111 within a predetermined range. This is because the module assembly 111 generates heat as the battery system is charged and discharged, so that the module assembly 111 is cooled for the purpose of maintaining the performance of the battery system and ensuring safety. As a cooling air supply method, as shown in FIG. 10, the cooling air is allowed to flow from the lower surface side to the upper surface side of the module assembly 111.
[0007]
As shown in FIG. 10, in the module assembly 111, a gap 134 as a cooling air flow path is formed between the battery modules as described above. Therefore, the cooling air supplied from the direction of the arrow 135 on the lower side of the battery pack portion 105 passes through the gap 134 between the battery modules 122 in the module assembly 111, as indicated by the arrow 136. It circulates from the lower surface side to the upper surface side. Thereafter, the cooling air is discharged in the direction indicated by the arrow 135 on the upper surface of the module assembly 111.
[0008]
[Problems to be solved by the invention]
The conventional battery system described above has the following problems.
[0009]
In the conventional battery system, as can be seen from FIG. 9, the restraining pipes 108 a and 108 are arranged on the upper surface and the lower surface of the module assembly 111, respectively. The space on the upper surface side and the space on the lower surface side of the module assembly 111 are flow paths through which cooling air flows. That is, the restraining pipes 108a and 108b are disposed inside the cooling air flow path.
[0010]
The restraint pipes 108a and 108b are used to maintain the shape of the module assembly 111 by fixing the battery module 122 and to give the module assembly 111 a predetermined strength. Therefore, the arrangement of the restraining pipes 108a and 108b is determined based on the strength calculation so that the module assembly 111 can have a predetermined strength.
[0011]
As described above, since the restraining pipes 108a and 108b are disposed in the flow path of the cooling air, the restraining pipes 108a and 108b have a resistance that hinders the flow of the cooling air. However, the arrangement and shape of the restraining pipes 108a and 108b are determined based on the strength standard of the module assembly 111, and the flow of the cooling air is not particularly taken into consideration. For this reason, the cooling efficiency when the module assembly 111 is cooled by the cooling air may be lowered due to the presence of the restraining pipes 108a and 108b. If the module assembly 111 is not sufficiently cooled, there may be a problem that the performance of the battery system deteriorates or the module assembly 111 of the battery system is damaged.
[0012]
This invention was made in order to solve the above problems, and the objective of this invention is to provide the assembled battery and battery system which can suppress the fall of cooling efficiency.
[0013]
[Means for Solving the Problems]
An assembled battery according to the present invention includes a battery assembly comprising a plurality of battery cells or battery modules, a plurality of restraining members that restrain the plurality of battery cells or battery modules, and a coolant that cools the battery assembly. A coolant supply means for supplying to the body, and on the surface of the battery cell or battery module, a convex portion is formed on the surface through which the coolant flows, and the plurality of restraining members are It is arranged so as to sandwich the battery assembly in the direction in which the coolant flows, It arrange | positions so that it may overlap with a convex part in the flow direction of the coolant in the vicinity of a convex part.
[0014]
In this way, when the coolant flows around the restraint member, the restraint member is formed in a region where the convex portion and the restraint member do not overlap each other in the direction in which the coolant flows. Can be prevented from obstructing the flow of coolant. For this reason, it can suppress that the cooling efficiency of a battery assembly falls resulting from presence of a restraint member.
[0015]
In the above assembled battery, a plurality of convex portions may be formed on the surface through which the coolant of the battery cell or battery module circulates, and each of the plurality of restraining members is in the direction in which the coolant flows in the vicinity of the plurality of convex portions. In, it may be arrange | positioned so that any one of several convex parts may overlap.
[0016]
In this case, since the restraining member is disposed so as to overlap any one of the plurality of convex portions, the degree of freedom in arranging the plurality of restraining members can be increased.
[0017]
In the above assembled battery, the battery assembly may be configured by stacking a plurality of battery cells or battery modules with a gap therebetween, and the convex portion may be arranged in the gap. In the above assembled battery, the coolant may circulate through the gap, and the restraining member is disposed in an area on the outer peripheral surface of the battery assembly that overlaps the convex portion in the direction in which the coolant flows in the gap. May be.
[0018]
In this case, since the restraining member is disposed on the outer peripheral surface of the battery assembly, the structure of the battery assembly can be simplified as compared with the case where the restraining member is disposed so as to penetrate the inside of the battery assembly. With the above configuration, when the coolant flowing through the gap between the battery cells or the battery modules flows out to the region on the outer peripheral surface of the battery assembly where the restraint member is disposed, When the coolant flows from the region on the outer peripheral surface of the battery assembly disposed into the gap between the battery cells or the battery modules, the restraining member and the convex portion simultaneously become a resistance that hinders the flow of the coolant. Can be prevented. That is, when the restraining member and the convex portion are arranged so as not to overlap in the direction in which the coolant flows, the area of the restraining member and the convex portion (coolant) when viewed from the upstream side in the coolant flowing direction. However, when the restraining member and the convex portion are arranged so as to overlap in the coolant flow direction as in the present invention, the area of the portion that blocks the coolant flow path is increased. The area is relatively small. As a result, it is possible to suppress a decrease in cooling efficiency of the battery assembly.
[0019]
In the battery assembly, the plurality of restraining members may be disposed so as to sandwich the battery assembly in the direction in which the coolant flows in the gap, and may be disposed at asymmetric positions when viewed from the battery assembly. .
[0020]
The assembled battery according to the present invention comprises a plurality of battery cells or battery modules, and has an upper surface. And the lower surface located opposite to the upper surface A battery assembly having Located on the lower surface, A restraining member for restraining a plurality of battery cells or battery modules; Another restraining member located on the upper surface and restraining a plurality of battery cells or battery modules; And a coolant supply means for supplying a coolant for cooling the battery assembly from the upper surface side to the battery assembly, and on the surface of the battery cell or battery module, a convex portion is formed in a region where the coolant contacts, In the direction of coolant flow in the vicinity of the protrusion, it overlaps with the protrusion. Like Restraint member And other restraints Is arranged.
[0021]
In this way, when the coolant flows around the restraint member, the restraint member is formed in the region where the convex portion and the restraint member do not overlap each other in the direction in which the coolant flows. It is possible to prevent obstruction of the coolant flow. For this reason, it can suppress that the cooling efficiency of a battery assembly falls resulting from presence of a restraint member.
[0022]
In the above assembled battery , The bundle member and the other restraining members may be arranged at positions that are asymmetric when viewed from the battery assembly.
[0023]
In the above assembled battery, the convex portion may be a part of a partition wall that separates a plurality of battery cells constituting the battery module.
[0024]
In this case, since a component necessary for the operation of the battery module, such as a part of the partition wall constituting the battery module, is used as the convex portion, it is necessary to add a new member to the assembled battery as the convex portion in the present invention. No. For this reason, it can prevent that the structure of the assembled battery by this invention becomes complicated. As a result, the assembled battery according to the present invention can be realized without increasing the manufacturing cost.
[0025]
In the above assembled battery, the convex portion may be a spacer for defining a distance between battery cells or battery modules in the battery assembly.
[0026]
In this case, since the spacer necessary for forming the gap between the battery cells or the battery modules is used as the convex portion, it is not necessary to add a new member to the assembled battery as the convex portion in the present invention. For this reason, it can prevent that the structure of the assembled battery by this invention becomes complicated. As a result, the assembled battery according to the present invention can be realized without increasing the manufacturing cost.
[0027]
In many cases, the spacer is previously formed in the flow path of the coolant, but in this case, it is not necessary to add a new member as a convex portion to the flow path. Therefore, it is possible to prevent an increase in the number of members that obstruct the flow of the coolant in the coolant flow path included in the coolant supply means.
[0028]
Furthermore, the battery system according to the present invention includes the above assembled battery.
In this case, a battery system capable of preventing performance deterioration and breakage can be realized.
[0029]
The battery system may be mounted on an automobile.
Here, battery systems installed in automobiles are more severe than usual, such as vibration conditions and temperature conditions are more severe than ordinary installation type battery systems, and there may be a temporary high load. Used in. Also, in so-called hybrid cars and the like, charging / discharging of the battery system is frequently repeated, so it is necessary to reliably remove the heat generated from the battery system along with this charging / discharging. Under such severe usage conditions, the temperature control of the battery assembly constituting the battery system is extremely important in order to ensure the safety and soundness of the battery system, and it is required to keep the cooling efficiency of the battery system high. It is done. For this reason, it is particularly effective to apply the present invention to a battery system mounted on an automobile.
[0030]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following drawings, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated.
[0031]
FIG. 1 is a schematic perspective view showing a battery pack portion constituting an embodiment of a battery system according to the present invention. FIG. 2 is a block diagram showing a configuration of an automobile using a battery system including the battery pack portion shown in FIG. FIG. 3 is a developed schematic view for explaining the configuration of the battery pack portion shown in FIG. 4 is a schematic cross-sectional view taken along line IV-IV in FIG. 5 is a partially enlarged perspective schematic view of the battery pack portion shown in FIG. With reference to FIGS. 1-5, embodiment of the battery system by this invention is described.
[0032]
The battery system according to the present invention is a battery system mounted on a vehicle of an automobile, and includes a battery pack portion 5 as shown in FIG. 1 and a fan and cooling air for supplying cooling air to the battery pack portion 5. It includes an exhaust duct that discharges to the outside of the automobile, a safety device used for maintenance of the battery system, and a battery computer for controlling the battery system.
[0033]
As shown in FIG. 2, the automobile 1 to which the battery system according to the present invention is applied includes a control unit 2, a battery unit 3 including the battery system according to the present invention, and a drive unit 4. The control unit 2 controls the battery unit 3 and the drive unit 4. The drive unit 4 includes an electric motor such as a motor that is driven by a current supplied from the battery unit 3. The drive unit 4 may include an internal combustion engine such as a gasoline engine or a diesel engine in addition to the electric motor. That is, the vehicle 1 is not only an electric vehicle that uses only an electric motor such as a motor driven by the current supplied from the battery unit 3 as a driving source, but also a so-called hybrid car that includes driving means other than the electric motor such as a gasoline engine as a driving source. Is also included.
[0034]
The battery pack portion 5 shown in FIG. 1 is composed of a plurality of members as shown in FIG. Referring to FIG. 3, the battery pack portion 5 includes a module assembly 11 configured by stacking a plurality of box-shaped battery modules 22 inside an exterior member including a battery cover 6 and a lower case 12. Yes. As the battery module 22 as the battery assembly, for example, a nickel-hydrogen battery can be used. As the battery module 22, other types of batteries may be used as long as they are chargeable / dischargeable secondary batteries. The battery module 22 has a so-called square plate-like outer shape.
[0035]
Restraint plates 10a and 10b for fixing the stacked battery modules are disposed at both ends of the module assembly 11. The restraint plates 10a and 10b are connected and fixed to each other by restraint pipes 8a and 8b as restraint members. The restraining plates 10a and 10b are fixed to the lower case 12. Each battery module 22 is also fixed to the lower case 12. The restraint pipes 8a and 8b are disposed on the upper surface and the lower surface of the module assembly 11, respectively. Thus, since the restraint pipes 8a and 8b are disposed on the surface of the module assembly 11, the structure of the module assembly 11 is simplified compared to the case where the restraint pipe is disposed so as to penetrate the inside of the module assembly 11. Can be
[0036]
On the upper surface of the module assembly 11, exhaust terminals 15 for discharging a gas such as hydrogen gas released from the inside of the battery module 22 are formed in each battery module 22. On the exhaust terminals 15, exhaust hoses 7 connected to the respective exhaust terminals 15 and exhausting the gas discharged from the exhaust terminals 15 to the outside of the battery pack portion 5 are installed. In addition, a temperature sensor 13 for detecting the temperature of the module assembly 11 is disposed on the upper surface of the module assembly 11.
[0037]
On the side surface side of the module assembly 11, terminals 16 for charging and discharging the battery module 22 are arranged on the side surface of the battery module 22. Bus bar modules 9a and 9b are arranged to connect the respective terminals 16 of the battery module 22. By connecting each terminal 16 of the battery module 22 by the bus bar modules 9a and 9b, the plurality of battery modules 22 constituting the module assembly 11 are electrically connected in series.
[0038]
The module assembly 11 as the battery pack unit is configured by stacking a plurality of battery modules 22 as described above. A gap is formed between the battery modules 22 for circulating the cooling air. On the side surface of the battery module 22 facing the gap (the surface extending in a direction substantially perpendicular to the stacking direction in which the battery modules 22 are stacked in the module assembly 11), as shown in FIG. 21e is formed. The spacer convex portions 21 a to 21 e are in a state protruding from the side wall surface of the battery module 22 by a predetermined height. The battery module 22 is a combination of a plurality of battery cells, and a partition is formed between adjacent battery cells. The spacer convex portions 21a to 21e constitute a part of the partition wall.
[0039]
When a plurality of battery modules 22 are stacked, the presence of the spacer protrusions 21a to 21e of the battery module 22 creates a gap between the battery modules 22 arranged adjacent to each other. . Through this gap, as indicated by an arrow 14 shown in FIG. 1, the module assembly 11 is constituted by a flow path 25 (see FIG. 4) in which cooling air as a coolant is located on the upper surface side of the module assembly 11. Flows through the gap between the battery modules 22 to the lower flow path 24 (see FIG. 4) of the module assembly 11. At this time, the heat of the module assembly 11 is removed by the cooling air. The coolant supply means includes a fan for sending cooling air to the flow path 25, the flow paths 24 and 25, an exhaust duct connected to the flow path 24 for discharging the cooling air to the outside, and the like.
[0040]
As shown in FIG. 4, the flow path 25 is an area surrounded by the battery cover 6 and the upper surface of the module assembly 11. The flow path 24 is a space formed between the lower surface of the module assembly 11 and the cover case 12. The convex portions 26 a and 26 b formed on the lower case 12 are in contact with both end portions of the lower surface of the module assembly 11. The convex portions 26a and 26b are formed so as to extend in the direction perpendicular to the plane of FIG. 4 (the stacking direction in which the battery modules 22 are stacked in the module assembly 11). Further, the bottom wall surfaces of the recesses 27 a and 27 b formed in the battery cover 6 are arranged so as to be in contact with both end portions of the upper surface of the module assembly 11. The recesses 27a and 27b are also formed so as to extend along the direction in which the battery modules 22 of the module assembly 11 are stacked. That is, the flow paths 24 and 25 are formed so as to extend along the module assembly 11 in the stacking direction in which the battery modules 22 are stacked in the module assembly 11. Further, since the concave portions 27a and 27b and the convex portions 26a and 26b are in contact with the surface of the module assembly 11, the gap between the flow path 25 and the battery module 22 (in the direction indicated by the arrow 14 in FIG. 4). The cooling air flowing into the flow path 24 hardly flows into the gaps 23 a and 23 b formed on the side wall surface of the module assembly 11.
[0041]
As shown in FIG. 4, in order to restrain the module assembly 11, the restraint pipe 8 a as another restraining member disposed on the upper surface of the module assembly 11 includes spacer projections 21 b and 21 d and cooling air. In the direction of flow (direction indicated by arrow 14 in FIG. 4). Further, in the direction in which the cooling air flows indicated by the arrow 14, the restraining pipe 8b as the restraining member is arranged at a position overlapping the spacer convex portions 21a and 21e and on the downstream side. The restraint pipes 8a and 8b are disposed so as to sandwich the module assembly 11 in the direction in which the cooling air flows, and are disposed at asymmetric positions when viewed from the module assembly 11. Here, the direction in which the cooling air flows means the direction in which the cooling air flows in the gap between the battery modules 22.
[0042]
As a result, as shown in FIG. 5, when the cooling air flows in the direction indicated by the arrow 14, the constraining pipe 8b is disposed so as to overlap the downstream side of the spacer convex portion 21a. Can be prevented from being hindered by the restraining pipe 8b. As a result, it is possible to prevent the problem that the cooling efficiency is lowered due to the presence of the restraining pipe 8b.
[0043]
Further, the restraint pipe 8a is also arranged at a position that overlaps with the spacer projections 21b and 21d, so that the restraint pipe 8a is arranged at a position that does not overlap with the spacer projections 21b and 21d in the direction in which the cooling air flows. Therefore, the resistance in the cooling channel through which the cooling air flows can be reduced. As a result, it is possible to suppress a decrease in cooling efficiency due to the presence of the restraining pipe 8a. In addition, it is preferable to arrange | position the restraint pipe 8a in the position which divides the flow path 25 equally in the width direction of the flow path 25 (direction substantially perpendicular | vertical with respect to the lamination direction of the battery module 22). For example, in the battery system shown in FIGS. 1 to 5, the restraining pipe 8 a is disposed at a position that divides the flow path 25 into three equal parts in the width direction. In this case, the cooling air can be supplied uniformly in the width direction of the flow path 25 on the upper surface of the module assembly 11.
[0044]
Further, as shown in FIG. 4, by intensively arranging the exhaust terminals 15 and the exhaust hoses 7 of the battery module in the vicinity of the restraining pipe 8a, the resistance due to these structures against the cooling air can be further reduced. it can.
[0045]
The battery module 22 is formed with a plurality of spacer convex portions 21a to 21e. Therefore, each of the restraining pipes 8a and 8b can be arranged so as to overlap with any one of the plurality of spacer convex portions 21a to 21e in the direction in which the cooling air flows. In this case, the freedom degree of arrangement | positioning of restraint pipe 8a, 8b can be enlarged.
[0046]
In addition, since the restraint pipe 8b is disposed on the downstream side of the constituent members (for example, the spacer convex portions 21a to 21e) installed from the beginning in the battery module 22, it is necessary to add a new member as compared with the conventional battery system. There is no. For this reason, it can prevent that the manufacturing cost of the battery system by this invention increases. Further, since the spacer convex portions 21a to 21e that are present in the cooling air flow path from the beginning are used, there is no increase in the number of members that obstruct the flow of the cooling air.
[0047]
In addition, for battery systems mounted on electric vehicles and the like, temperature control is extremely important for ensuring safety and soundness. Therefore, it is required to keep the cooling efficiency of the battery system high. Therefore, it is particularly effective to apply the battery system according to the present invention to an automobile.
[0048]
FIG. 6 is a schematic cross-sectional view showing a modification of the battery system according to the present invention shown in FIGS. FIG. 6 corresponds to FIG. A modification of the embodiment of the battery system according to the present invention will be described with reference to FIG.
[0049]
Referring to FIG. 6, battery pack portion 5 constituting the battery system basically has the same structure as battery pack portion 5 of the battery system shown in FIGS. Different. That is, the constraining pipe 8b is disposed on the downstream side in a direction overlapping the spacer convex portions 21b and 21d of the battery module 22 in the direction in which the cooling air flows (direction indicated by the arrow 14).
[0050]
If it does in this way, restraint pipe 8a, spacer convex parts 21b and 21d, and restraint pipe 8b can all be arranged in the position which overlaps seeing from the direction through which cooling air flows. For this reason, the resistance which a cooling wind receives with these structures can be reduced more. As a result, similarly to the battery system shown in FIGS. 1 to 5, it is possible to suppress the occurrence of the problem that the cooling efficiency is lowered due to the deterioration of the flow of the cooling air due to the presence of the restraining pipes 8a and 8b.
[0051]
In addition, although the case where gas was used as a coolant was described in the embodiment of the present invention, a substance other than gas, such as a liquid coolant, may be used as the coolant. In this case, the same effect can be obtained.
[0052]
Further, the positions of the restraining pipes 8a and 8b may be other than the positions shown in FIGS. 1 to 6 as long as they overlap with the spacer protrusions 21a to 21e in the direction in which the cooling air flows.
[0053]
In the embodiment of the present invention described above, the module assembly 11 (see FIG. 3), which is a stacked body of the battery modules 22 (see FIG. 4), has been described. The present invention can also be applied to a battery system using a stacked laminate.
[0054]
The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above-described embodiment but by the scope of claims for patent, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims for patent.
[0055]
【The invention's effect】
According to the present invention, the convex portion positioned in the coolant flow path and the battery assembly restraining member constituting the battery module are arranged so as to overlap in the direction in which the coolant flows. Can be reduced. As a result, it can suppress that the cooling efficiency of an assembled battery and a battery system falls.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view showing a battery pack portion constituting an embodiment of a battery system according to the present invention.
FIG. 2 is a block diagram showing a configuration of an automobile using a battery system including the battery pack portion shown in FIG.
3 is a developed schematic view for explaining the configuration of the battery pack portion shown in FIG. 1. FIG.
4 is a schematic cross-sectional view taken along line IV-IV in FIG. 1. FIG.
5 is a partially enlarged perspective schematic view of the battery pack portion shown in FIG. 4. FIG.
FIG. 6 is a schematic cross-sectional view showing a modification of the battery system according to the present invention shown in FIGS.
FIG. 7 is a schematic perspective view showing a conventional battery system mounted on an automobile.
8 is a developed schematic view of a battery pack portion constituting the battery system shown in FIG.
9 is a schematic cross-sectional view of a battery pack portion taken along line IX-IX in FIG.
10 is a schematic cross-sectional view of a battery pack portion taken along line XX in FIG. 9. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Automobile, 2 Control part, 3 Battery part, 4 Drive part, 5 Battery pack part, 6 Battery cover, 7 Exhaust hose, 8a, 8b Restraint pipe, 9a, 9b Bus bar module, 10a, 10b Restraint plate, 11 Module assembly , 12 Lower case, 13 Temperature sensor, 14 Arrow, 15 Exhaust terminal, 16 Terminal, 21a-21e Spacer convex part, 22 Battery module, 23a, 23b Gap, 24, 25 Flow path, 26a, 26b Convex part, 27a, 27b recess.

Claims (10)

A battery assembly comprising a plurality of battery cells or battery modules;
A plurality of restraining members for restraining the plurality of battery cells or battery modules;
A coolant supply means for supplying a coolant for cooling the battery assembly to the battery assembly;
On the surface of the battery cell or battery module, a convex portion is formed on the surface through which the coolant flows.
The plurality of restraining members are disposed so as to sandwich the battery assembly in a direction in which the coolant flows, and are disposed so as to overlap the convex portions in the direction in which the coolant flows in the vicinity of the convex portions. The assembled battery. A plurality of the protrusions are formed on the surface of the battery cell or battery module through which the coolant flows.
Each of the plurality of restraining members is arranged to overlap with any one of the plurality of convex portions in a direction in which the coolant flows in the vicinity of the plurality of convex portions. Collective battery. The battery assembly is configured by stacking a plurality of the battery cells or battery modules with a gap therebetween,
The convex portion is disposed in the gap;
The coolant flows through the gap;
3. The assembly according to claim 1, wherein the restraining member is disposed in a region on an outer peripheral surface of the battery assembly, the region being overlapped with the convex portion in a direction in which the coolant flows in the gap. battery.   The plurality of restraining members are disposed so as to sandwich the battery assembly in a direction in which the coolant flows in the gap, and are disposed at asymmetric positions as viewed from the battery assembly. 3. The assembled battery according to 3. A battery assembly comprising a plurality of battery cells or battery modules, and having an upper surface and a lower surface located opposite to the upper surface ;
A restraining member located on the lower surface and restraining the plurality of battery cells or battery modules;
Another restraining member located on the upper surface and restraining the plurality of battery cells or battery modules;
A coolant supply means for supplying a coolant for cooling the battery assembly from the upper surface side to the battery assembly;
On the surface of the battery cell or battery module, a convex portion is formed on the surface through which the coolant flows.
The assembled battery, wherein the restraining member and the other restraining member are arranged so as to overlap the convex portion in a direction in which the coolant flows in the vicinity of the convex portion. The previous SL restraining member and the other of the restraining member, said viewed from battery assembly are arranged on asymmetric position, assembled battery according to claim 5.   The assembled battery according to claim 1, wherein the convex portion is a part of a partition wall that separates a plurality of battery cells constituting the battery module.   The assembled battery according to claim 1, wherein the convex portion is a spacer for defining a distance between the battery cell or the battery module in the battery assembly.   The battery system containing the assembled battery of any one of Claims 1-8.   The battery system according to claim 9, wherein the battery system is mounted on an automobile.

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