Battery housing device, method for manufacturing battery housing device, and electric moving body including battery housing device

Abstract

To provide a battery housing device which is excellent in housing space efficiency and cooling efficiency and is advantageous in terms of component cost, and to provide a manufacturing method of the battery housing device and an electric moving body equipped with the battery housing device.SOLUTION: The battery housing device 1 includes an aluminum battery case 2, and a resin module case 4 housed in the battery case 2 and capable of housing a lithium ion battery 3. The resin module case 4 is housed inside the battery case 2 in such a manner that the outer surface of the resin module case 4 is fitted to the inner surface of the battery case 2, and the cooling water passage 5 is formed in the resin module case 4 itself, so that the height of the battery housing device 1 can be reduced, that is, the space efficiency can be improved.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a battery storage device used in an electric vehicle, a manufacturing method for a battery storage device, and an electric vehicle equipped with this battery storage device, and in particular to a battery storage device that can be stored in a narrow space by reducing the overall height, a manufacturing method for a battery storage device, and an electric vehicle equipped with this battery storage device. [Background technology]

[0002] Generally, cooling methods are classified as air cooling, water cooling, or refrigerant cooling. Of these, natural air cooling has a simple structure but has limitations on battery performance and a relatively short battery life. Open-type forced air cooling has a simple structure but has the problem of being unable to control temperature. Furthermore, closed-type forced air cooling does not have the problem of water leakage like water cooling, but has the problem of being more difficult to cool than water cooling and requires fan / duct space.

[0003] Direct cooling using a liquid other than water as a refrigerant has the advantage of being highly effective in cooling and easy to control, but requires measures to prevent refrigerant leakage.

[0004] Furthermore, the cooling system that uses water, i.e., the radiator system, which is a water-cooled system, has a simple structure but the problem is that it cannot be cooled below the outside temperature.The chiller system, which is also a water-cooled system, has the advantage of being simple in structure and can cool reliably, but it also has the problem of being able to warm the battery. Although the hybrid system of a radiator and chiller makes it easy to control the cooling, it has a complex structure and there is a possibility of water leakage problems.

[0005] Among the various cooling methods mentioned above, water-cooled battery cooling devices have traditionally employed a system in which a battery case, a module case that is housed in the battery case, and multiple batteries are housed in the module case. By adopting this battery module system, it is possible to simplify the battery assembly process. Specifically, this solves the problem of the enormous number of steps required for the battery assembly process when batteries are placed one by one into a battery case, and then each battery is fixed and wired. This dramatically improves productivity. Furthermore, by adopting such a battery module, the battery assembly process can be made into a sub-line or performed in a separate location, increasing the flexibility of process design.

[0006] In the battery cooling device shown in Patent Document 1, which is a conventional system, the battery module 100 includes a plurality of battery cells 101 stacked in the front-to-rear direction, and a module case 105 that houses the plurality of battery cells 101, as shown in FIG.

[0007] Furthermore, as shown in FIG. 24, the battery case 200 includes a lower case 201 in the shape of a substantially horizontal plate, and a cover 206 attached to the lower case 201 so as to cover it from above.

[0008] 25, after multiple battery modules 100 are fixed to the lower case 201, a cover 206 is placed over the battery modules 100 so as to conceal them from above, and the placed cover 206 is fixed to the lower case 201 with bolts or the like. In this way, the battery case 200 is constructed, and multiple battery modules 100 are housed in the battery case 200 in a fixed state. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Japanese Patent Application Publication No. 2018-163741 Summary of the Invention [Problem to be solved by the invention]

[0010] In the battery storage device disclosed in Patent Document 1, as shown in Fig. 26, a cooler 300 is disposed between the underside of the battery module 100 and the upper surface of the bottom plate portion 202 of the lower case 201. As a result, a storage space is required that is the ground clearance calculated by adding together the heights of the bottom plate portion 202 of the lower case 201, the battery module 100, and the cooler 300. Furthermore, the battery module 100 and the cooler 300 are disposed adjacent to each other above and below, so the battery module 100 is simply cooled from below, which limits the cooling efficiency. Another problem is that such a component configuration increases the number of components, resulting in increased component costs.

[0011] In view of the problems associated with the above-mentioned conventional technology, the present invention aims to provide a battery storage device that is space-efficient, has good cooling efficiency, and is advantageous in terms of component costs, a method for manufacturing a battery storage device, and an electric vehicle equipped with this battery storage device. [Means for solving the problem]

[0012] In other words, the battery storage device of the present invention is a battery storage device that includes a battery case and a module case that is housed in the battery case and is capable of housing a battery, and is characterized in that the module case itself has a temperature regulating liquid path.

[0013] The battery storage device of the present invention is characterized in that it includes a battery case and a module case that is housed in the battery case and is capable of housing a battery, and has a temperature regulating liquid path that is integral with the module case.

[0014] Furthermore, the battery storage device of the present invention is a battery storage device comprising a battery case and a module case that is housed in the battery case and is capable of housing a battery, and is characterized in that a temperature regulating liquid path is formed in the module case.

[0015] Furthermore, the manufacturing method of the battery storage device of the present invention is characterized in that it comprises the steps of integrally forming the bottom and side of the module case by resin injection molding to obtain a main body portion in which a temperature control liquid path is formed, and welding a bottom panel to the opening portion of the temperature control liquid path to obtain the module case.

[0016] Furthermore, the manufacturing method of the battery storage device of the present invention is characterized in that it comprises a step of injection molding a module case main body and a module case piping cut model in advance, and a step of vibration welding the module case piping cut model to the module case main body. It is characterized by:

[0017] In addition, the electric vehicle of the present invention is an electric vehicle equipped with the battery storage device of the present invention, characterized in that the battery storage device supplies power to a motor that generates the driving force of the vehicle. [Effects of the Invention]

[0018] The battery storage device and manufacturing method for the battery storage device of the present invention, as well as an electric vehicle equipped with this battery storage device, have excellent effects such as good storage space efficiency and cooling efficiency, and are also advantageous in terms of component costs. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a schematic cross-sectional view of a battery storage device according to an embodiment of the present invention. [Figure 2] FIG. 2 is an exploded perspective view of the battery storage device of FIG. 1. [Figure 3] FIG. 10 is a schematic cross-sectional view of a battery storage device according to another embodiment of the present invention. [Figure 4]1A and 1B are perspective views showing examples of battery storage states using the battery storage device of the present invention, in which (a) the battery arrangement when the bottom surface of the battery is cooled, and (b) the battery arrangement when the side surface of the battery is cooled. [Figure 5] 3 is a schematic diagram showing one pattern of a temperature adjusting liquid path in a battery storage device according to one embodiment of the present invention. FIG. [Figure 6] 10A and 10B are schematic diagrams showing other patterns of temperature adjusting liquid paths in the battery storage device according to the embodiment of the present invention. [Figure 7] 10A and 10B are schematic diagrams showing other patterns of temperature adjusting liquid paths in the battery storage device according to the embodiment of the present invention. [Figure 8] 10 is a schematic diagram showing still another pattern of the temperature adjusting liquid path in the battery storage device according to the embodiment of the present invention. FIG. [Figure 9] FIG. 10 is a partial perspective view of a battery storage device according to another embodiment of the present invention. [Figure 10] FIG. 10 is a partial schematic view of a battery storage device according to another embodiment of the present invention. [Figure 11] FIG. 10 is a partial schematic view of a battery storage device according to still another embodiment of the present invention. [Figure 12] 10A and 10B are partial perspective views of a battery storage device according to still another embodiment of the present invention, in which FIG. 10A shows an assembly process and FIG. [Figure 13] FIG. 12(b) is a partially enlarged perspective view of FIG. [Figure 14] 10A and 10B are partial exploded perspective views showing an assembly process of a battery storage device according to still another embodiment of the present invention. [Figure 15] 15 is a partial perspective view showing the battery storage device of the embodiment shown in FIG. 14 after assembly. FIG. [Figure 16] FIG. 16 is a cross-sectional view of the battery storage device of the embodiment shown in FIG. 15. [Figure 17] 1A to 1C are explanatory diagrams illustrating an embodiment of a manufacturing method for a battery storage device of the present invention. [Figure 18]10A and 10B are explanatory views of another embodiment of the manufacturing method of the battery storage device of the present invention. [Figure 19] 10 is a diagram illustrating yet another embodiment of the manufacturing method of the battery storage device of the present invention. FIG. [Figure 20] FIG. 10 is an explanatory perspective view of another embodiment of the manufacturing method of the battery storage device of the present invention. [Figure 21] FIG. 21 is another explanatory perspective view of the embodiment shown in FIG. 20. [Figure 22] 1 is a schematic side perspective view of an embodiment of an electric vehicle of the present invention; [Figure 23] FIG. 10 is an exploded perspective view of a battery module in a conventional battery cooling device. [Figure 24] FIG. 10 is a perspective view of a battery case in a conventional battery cooling device. [Figure 25] FIG. 10 is a partial perspective view showing a state in which battery modules are housed in a battery case of a conventional battery cooling device. [Figure 26] FIG. 10 is a partial cross-sectional schematic view of a battery case in a conventional battery cooling device. DETAILED DESCRIPTION OF THE INVENTION

[0020] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 and 2, a battery storage device 1 according to one embodiment of the present invention includes an aluminum battery case 2 and a resin module case 4 that is housed in the battery case 2 and is capable of housing a lithium-ion battery 3. The resin module case 4 is housed inside the battery case 2 such that the outer surface of the resin module case 4 fits into the inner surface of the battery case 2. In the battery storage device 1 according to one embodiment of the present invention, the resin module case 4 itself has a cooling water path 5, which is a temperature adjustment liquid path. That is, the cooling water path 5 is formed in the resin module case 4 itself, and the resin module case 4 has an integral cooling water path 5. The temperature adjustment liquid path may also be a heated or heated water path.

[0021] More specifically, a recess 5a is formed in the bottom surface of the resin module case 4, and an opening 5b of the recess 5a is closed by the bottom panel 6 to form the cooling water path 5. An O-ring 7 is disposed between the bottom surface of the resin module case 4 and the top surface of the bottom panel 6 to provide a waterproof seal, and in this state the resin module case 4 and the bottom panel 6 are fastened together by bolts 8. Note that the resin module case 4 and the bottom panel 6 can also be fastened together by welding or adhesive means in addition to or in addition to the mechanical fastening with the bolts 8. The resin module case 4 also has an integrally formed separator 9, allowing a plurality of lithium ion batteries 3 to be housed with the separator 9 interposed therebetween.

[0022] As a result of the battery storage device 1 of this embodiment being configured as described above, the height of the battery storage device 1 can be reduced compared to conventional battery storage devices with a three-layer structure of a metal case, a cooling device, and a battery module. In other words, space efficiency can be improved. Moreover, the resin module case 4 itself has the cooling water path 5 formed therein, and the resin module case 4 has an integral cooling water path 5, which also improves cooling efficiency.

[0023] FIG. 3 shows a battery storage device 1 according to another embodiment of the present invention. In this embodiment, a resin module case 4 has a bottom 4a and a side 4b integrally formed therewith, and the side 4b itself has a cooling water passage 5. That is, the cooling water passage 5 is formed in the side 4b. More specifically, a recess 5c is formed in the side surface of the side 4b of the resin module case 4, and an opening 5d of the recess 5c is closed by a side panel 10 to form the cooling water passage 5. An O-ring 11 is disposed between the side surface of the resin module case 4 and the side surface of the side panel 10, and in this state, the resin module case 4 and the side panel 10 are fastened together with bolts (not shown). One end portion 10a of the side panel 10 is disposed so as to fit into the inner end of the battery case 2.

[0024] In the above embodiment, the resin module case 4 may be configured such that the bottom 4a and the side portions 4b are integrally formed, and the bottom 4a itself may also have the cooling water passage 5. In other words, the cooling water passage 5 may also be formed in the bottom 4a.

[0025] Figure 4(a) shows an arrangement of lithium ion batteries 3 in bottom cooling where the bottom 4a itself has the cooling water passage 5, and Figure 4(b) shows an arrangement of lithium ion batteries 3 in side cooling where the side 4b itself has the cooling water passage 5. In other words, it shows an arrangement of lithium ion batteries 3 in side cooling where the cooling water passage 5 is formed on the side 4b. In this case, by appropriately considering the size of the resin module case 4, it is possible to configure the resin module case 4 of the same size to store the same number of lithium ion batteries 3 in either bottom cooling or side cooling.

[0026] In each of the above embodiments, the resin module case 4 may be made of a material that improves thermal conductivity, such as a composite material in which aluminum nitride is dispersed to increase thermal conductivity. Furthermore, heat resistance can be enhanced by using a composite resin with CNF (cellulose nanofiber). Furthermore, the aluminum battery case 2 and side panels 10 can be made of carbon fiber composite resin to reduce their weight. In each of the above-described embodiments, as shown in FIG. 2, an inlet connection port 12 and an outlet connection port 13 connected to the cooling water path 5 are formed integrally with the resin module case 4 by resin molding on the bottom 4a and / or side 4b of the resin module case 4.

[0027] 5 to 8 show various patterns of the cooling water passages 5 formed in the bottom portion 4a. 5, multiple partition plates 14 of the same length are arranged parallel to one another at equal intervals on the bottom 4a, extending in the longitudinal direction of the bottom 4a. Both ends 14a, 14b of each partition plate 14 are long enough not to reach the inner surfaces on either short side of the bottom 4a, and the partition plates 14 are arranged with both ends 14a, 14b uniformly aligned. 5, the cooling water flowing in from the inlet connection port 12 travels in the same direction through the branch channels 5a, b along the inner surfaces on both long and short sides of the bottom 4a and through the branch channels 5c formed between the partition plates 14, and reaches the outlet connection port 13 and is then discharged. In this configuration, the cooling water flows in from the inlet connection port 12, reaches the outlet connection port 13, and is then discharged. In this pattern, the time it takes for the cooling water to flow in from the inlet connection port 12, reach the outlet connection port 13, and be discharged is relatively short, which is effective in improving the cooling efficiency when the temperature of the cooling water is relatively high.

[0028] In the pattern shown in Fig. 6, multiple partition plates 14 of the same length extending in the longitudinal direction of the bottom 4a are arranged parallel to one another at equal intervals on the bottom 4a, similar to the pattern in Fig. 5. However, the multiple partition plates 14 of the same length are arranged alternately so that one end 14a or 14b of each partition plate 14 reaches and abuts one of the inner surfaces on the short sides of the bottom 4a, and the other end does not reach or abut the other inner surface on the short sides. As a result, in the pattern shown in Fig. 6, branch channels 5a are formed along the inner surfaces on both long sides of the bottom 4a for the cooling water flowing in from the inlet connection port 12, but branch channels extending along the inner surfaces on both short sides are not formed. 5, if the flow of cooling water that flows in from inlet connection port 12 and flows through branch channels 5a along both inner surfaces on the long sides of bottom 4a is considered to be a forward flow, the cooling water that flows in from connection port 12 and flows in the forward direction through branch channels 5a along both inner surfaces on the long sides of bottom 4a flows in the reverse direction between partition plates 14 when it reaches both inner surfaces on the short sides, and then flows in the forward direction again between partition plates 14 when it reaches both inner surfaces on the opposite short sides, alternately repeating this forward and reverse flow, meandering to reach outlet connection port 13 and be discharged. In this pattern, the time it takes for the cooling water to flow from inlet connection port 12 to outlet connection port 13 and be discharged is relatively long, which is effective in improving cooling efficiency when the temperature of the cooling water is relatively low.

[0029] 7, multiple partition plates 14 of the same length extending in the short direction of the bottom 4a are arranged parallel to one another at equal intervals on the bottom 4a. Both ends 14a, 14b of each partition plate 14 are long enough not to reach the inside surfaces on either longitudinal side of the bottom 4a, and the partition plates 14 are arranged with both ends 14a, 14b uniformly aligned. 5, the cooling water flowing in from the inlet connection port 12 flows in the same direction through the branch passages 5a and 5b along the inner surfaces on both long and short sides of the bottom 4a and through the branch passage 5c formed between the partition plates 14, before reaching and being discharged from the outlet connection port 13. This pattern is effective in improving the cooling efficiency when the temperature of the cooling water is relatively high, because the time it takes for the cooling water to flow in from the inlet connection port 12, reach the outlet connection port 13 and be discharged is relatively short.

[0030] In the pattern shown in Fig. 8, similar to the pattern shown in Fig. 7, multiple partition plates 14 of the same length extending in the short direction of the bottom 4a are arranged parallel to one another at equal intervals on the bottom 4a. However, the multiple partition plates 14 of the same length are arranged alternately so that one end 14a or 14b of each partition plate 14 reaches and abuts one of the inner longitudinal surfaces of the bottom 4a, and the other end does not reach or abut the other of the inner longitudinal surfaces. As a result, in the pattern shown in Fig. 8, branch channels 5a are formed along the inner longitudinal surfaces of the bottom 4a for the cooling water flowing in from the inlet connection port 12, but branch channels extending along the inner longitudinal surfaces are not formed. 7, if the flow of cooling water that flows in from inlet connection port 12 and flows through branch channels 5a along both inner surfaces on the short sides of bottom 4a is considered to be a forward flow, the cooling water that flows in from connection port 12 and flows in the forward direction through branch channels 5a along both inner surfaces on the short sides of bottom 4a flows in the reverse direction between partition plates 14 when it reaches both inner surfaces on the long sides, and then flows in the forward direction again between partition plates 14 when it reaches both inner surfaces on the opposite long sides, alternately repeating this forward and reverse flow, meandering to reach outlet connection port 13 and be discharged. In this pattern, the time it takes for the cooling water to flow from inlet connection port 12 to outlet connection port 13 and be discharged is relatively long, which is effective in improving cooling efficiency when the temperature of the cooling water is relatively low.

[0031] Figure 9 shows a resin module case 4 according to yet another embodiment of the present invention. In this embodiment, cooling piping 15 is further provided around the outer periphery of the resin module case 4 to enhance the cooling effect. Cooling piping 15 is formed by pre-setting a thick portion of the resin module case 4 during the molding process, and creating a cavity by injecting gas into that portion. This cavity serves as a flow path for the cooling medium, i.e., cooling piping 15. This further improves the cooling performance of the resin module case 4.

[0032] 10 and 11 show other forms of the resin module case 4 of the battery storage device 1 of the present invention. The resin module case 4 shown in Fig. 10 is obtained using a slide mold during gas injection molding, with most of the cooling water path 5 formed from a resin layer, and the resin module case 4 can be obtained by welding bottom panels 6 to openings 5b formed on both short side surfaces of the resin module case 4 using a slide mold after molding. In this case, two identical bottom panels 6 on both sides are sufficient. The cooling water path 5 has its longitudinal direction aligned with the longitudinal direction of the resin module case 4, forming a serpentine cooling water path 5 with forward and reverse directions formed alternately.

[0033] The resin module case 4 shown in Fig. 11 is also obtained using a slide mold during gas injection molding, and the cooling water path 5 has its longitudinal direction aligned with the widthwise direction of the resin module case 4, resulting in a cooling water path 5 that snakes along the longitudinal direction of the resin module case 4. The openings 5b are formed on both longitudinal side surfaces of the resin module case 4, and the resin module case 4 can be obtained by welding the bottom panel 6 after molding. In this case, two identical bottom panels 6 on both sides are sufficient.

[0034] 12(a) and 12(b) show another embodiment of the resin module case 4 of the battery storage device 1 of the present invention. In this embodiment, a metal part 16 obtained by sheet metal pressing or the like is insert-molded into the wall of the resin module case 4 to enhance the cooling effect. In this case, if a metal plate were to be in direct contact with the lithium-ion battery 3, a short circuit could occur, potentially damaging the lithium-ion battery 3. This would prevent heat dissipation from the metal plate, resulting in reduced cooling performance. Therefore, when the resin module case 4 is injection-molded, a plate-shaped metal part 16 made of a material with high thermal conductivity, such as copper or aluminum, is insert-molded to improve temperature control within the resin module case 4, eliminate the possibility of short circuits, and prevent a decrease in cooling performance. To achieve this, the main body of the resin module case 4 is formed with locking holes 17 on both longitudinal sides to engage with the locking portions 16a of the plate-shaped metal part 16. Furthermore, the outer surface of the resin module case 4 is provided with eaves 17a, b, c, and d that surround the locking holes 17 and extend outward from the outer surface of the resin module case 4. The eaves 17a, b, c, and d are shown enlarged in Figure 12, enclosed by oval dashed lines. The end of the locking portion 16a of the plate-shaped metal part 16 extends to the outside of the resin module case 4 through the locking hole portion 17 and engages with the eaves portions 17a, 17b, 17c, and 17d. 13, the opening area of ​​the locking hole 17 of the resin module case 4 is larger than the cross-sectional area of ​​the locking portion 16 of 16, and as a result, a gap 18 can be provided in advance between the eaves portions 17a, b, c, d and the locking portion 16a of the metal part 16. This absorbs the difference in linear expansion between the resin portion and the metal portion due to temperature changes, improving the dimensional stability of the product.

[0035] Figure 14 shows another embodiment of the resin module case 4 of the battery storage device 1 of the present invention. In manufacturing the resin module case 4, a plate-shaped metal part 16 made of copper, aluminum, or other material with high thermal conductivity and formed by a press method is prepared in advance. This plate-shaped metal part 16 is placed, and a resin module case piping cutaway model 4e is fastened to the resin module case main body 4d by vibration welding, thereby obtaining the resin module case 4 shown in Figures 15 and 16. This makes it possible to efficiently cool the battery via the plate-shaped metal part 16 and the cooling medium in the cooling water path 5. Specifically, as shown in Figure 16, the end of the plate-shaped metal part 16 abuts against the cooling water path 5 and is cooled by the cooling water path 5, and the end of the engaging part 16a of the metal part 16 protrudes outside the resin module case 4, thereby dissipating heat.

[0036] A method for manufacturing the battery storage device 1 of the present invention will be described below. As shown in Figures 17, 18, and 19, first, a main body 4c is obtained by integrally forming the bottom 4a and side 4b of the resin module case 4 by resin injection molding. A predetermined injection mold (not shown) is used to form the cooling water passage 5 in the main body 4c. A bottom panel 6 is welded to the openings 5b of the cooling water passage 5 to obtain the resin module case 4. In this case, by welding a single bottom panel 6a to multiple openings 5b, the number of parts can be reduced and the number of steps required to weld the bottom panel 6 can be reduced. Furthermore, by forming the openings 5b at the longitudinal ends of the cooling water passage 5, the welding process can be simplified.

[0037] FIG. 20 shows another embodiment of the manufacturing method for the battery storage device 1 of the present invention. As shown in FIG. 20, a resin module case main body 4d and a resin module case piping cut model 4e are injection molded in advance. The resin module case piping cut model 4e is then vibration welded to the resin module case main body 4d to obtain the resin module case 4 shown in FIG. 21. This embodiment optimizes the cooling effect of the bottom cooling section of the resin module case 4. That is, the resin module case main body 4d is a component of the same embodiment, while the resin module case piping cut model 4e allows various coolant flow paths to be formed. This facilitates optimization of the coolant flow paths obtained by the resin module case piping cut model 4e. The optimized resin module case piping cut model 4e is then fastened by vibration welding, and the resulting resin module case 4 can be controlled to obtain an appropriate cooling effect.

[0038] 22 shows an automobile 19 as an electric vehicle equipped with a battery storage device 1 according to the present invention. In this automobile 19, the battery storage device 1 is arranged to supply electric power to a motor that generates driving force for the automobile 19. In this case, the battery storage device 1 is arranged below half the height of the overall height of the automobile 19. The automobile 19 is an electric automobile, a hybrid automobile, a PHEV, or an FHEV. The battery storage device 1 according to the present invention has a reduced height compared to conventional storage devices, and therefore the overall height of the vehicle 19 is reduced. As a result, the frontal projection area of ​​automobile 19 can be reduced, lowering the air resistance calculated by the air resistance coefficient (Cd = Contance drag) x frontal projection area, thereby improving power consumption. Furthermore, the overall height is low and battery storage device 1 is located below half the overall height of automobile 19, which reduces the center of gravity and improves steering performance. Electric and hybrid vehicles, in particular, have high torque, so reducing air resistance, even more so than reducing vehicle weight, contributes to reducing power consumption, making it extremely important to improve aerodynamic performance.

[0039] The electric vehicle equipped with the battery storage device 1 according to the present invention may be an aircraft, which is an aerial flying object, or a ship that moves on or underwater. Furthermore, an electric vehicle equipped with the battery storage device 1 according to the present invention may be a train that travels on a track installed on the ground. [Explanation of symbols]

[0040] 1 Battery storage device, 3 Lithium-ion battery, 2 Battery case, 4 Resin module case, 5 Cooling water path, 6 Bottom panel, 9 Separator.

Claims

1. A battery storage device comprising a battery case and a module case that is housed in the battery case and is capable of housing a battery, wherein a temperature regulating liquid path is formed in the module case.

2. A battery storage device comprising a battery case and a module case that is housed in the battery case and is capable of housing a battery, the battery storage device having a temperature regulating liquid path that is integral with the module case.

3. A battery storage device comprising a battery case and a module case that is housed in the battery case and is capable of housing a battery, wherein the module case itself has a temperature regulating liquid path.

4. 4. The battery storage device according to claim 1, wherein a separator is provided integrally with the module case, and a plurality of the batteries can be stored with the separator interposed therebetween.

5. 5. The battery storage device according to claim 1, wherein the module case has a bottom and a side formed integrally, and the temperature regulating liquid path is formed in the bottom.

6. 5. The battery storage device according to claim 1, wherein the module case has a bottom and a side formed integrally therewith, and the temperature regulating liquid path is formed in the side.

7. 7. The battery storage device according to claim 5, wherein an inlet connection port and an outlet connection port connected to the temperature regulating liquid path are formed integrally with the module case on the bottom and / or side.

8. 9. The battery storage device according to claim 1, wherein the module case is made of resin.

9. 9. The battery storage device according to claim 1, wherein the module case is made of a composite material in which a material that improves thermal conductivity is dispersed.

10. The battery storage device according to any one of claims 1 to 9, wherein the module case is made of a composite resin containing CNF (cellulose nanofiber).

11. The battery storage device according to any one of claims 1 to 10, wherein the battery case is made of a carbon fiber composite resin.

12. 12. The battery storage device according to claim 1, wherein the temperature regulating liquid path is branched into a plurality of paths, and the temperature regulating liquid in at least one pair of the branch paths flows in the same direction.

13. 13. The battery storage device according to claim 1, wherein the temperature regulating liquid path is branched into a plurality of paths, and the flow directions of the temperature regulating liquid in at least a pair of the branch paths are opposite to each other.

14. 14. The battery storage device according to claim 1, further comprising a cooling pipe provided on the outer periphery of the module case.

15. 15. The battery storage device according to claim 1, wherein the module case is formed using a slide mold, and a bottom panel is welded to an opening formed by the slide mold.

16. 16. The battery storage device according to claim 1, wherein bottom panels are welded to two opposing side surfaces of the module case.

17. The battery storage device according to any one of claims 1 to 16, wherein a metal part is insert-molded into the module case.

18. 18. The battery storage device of claim 17, wherein the module case main body has a locking hole portion for locking a locking portion provided on the plate-shaped metal part, and the metal part is insert-molded by engaging the metal part with the locking hole portion formed in the module case main body.

19. 19. The battery storage device according to claim 18, wherein an opening area of ​​the locking hole of the module case is larger than a cross-sectional area of ​​the locking portion of the metal part.

20. 20. The battery storage device according to claim 18, wherein an end of the metal part abuts against the temperature regulating liquid path, and an end of the engaging part protrudes outside the module case.

21. 21. A manufacturing method for a battery storage device according to any one of claims 1 to 20, comprising: a step of integrally forming the bottom and side of a module case by resin injection molding to obtain a main body portion in which a temperature control liquid path is formed; and a step of welding a bottom panel to an opening portion of the temperature control liquid path to obtain the module case.

22. 22. The method of claim 21, further comprising welding a single bottom panel to a plurality of the openings.

23. A manufacturing method for a battery storage device according to any one of claims 1 to 19, comprising: a step of injection molding a module case main body and a module case piping cut model in advance; and a step of vibration welding the module case piping cut model to the module case main body.

24. 24. The manufacturing method for a battery storage device according to claim 23, wherein flow paths for two or more types of cooling medium can be formed in the module case piping cut model for the same module case main body.

25. 20. An electric vehicle comprising the battery storage device according to any one of claims 1 to 19, wherein the battery storage device supplies electric power to a motor that generates driving force for the vehicle.

26. 26. The electric vehicle according to claim 25, wherein the battery storage device is disposed below half the height of the vehicle body.

27. 27. The electric vehicle according to claim 25 or 26, wherein the electric vehicle is an electric vehicle, a hybrid vehicle, a PHEV, or an FHEV that travels on land.

28. 27. The electric vehicle according to claim 25 or 26, wherein the electric vehicle is an aerial flying object.

29. 27. The electric vehicle according to claim 25 or 26, wherein the electric vehicle is a vessel that moves on or underwater.

30. 27. The electric vehicle according to claim 25 or 26, wherein the electric vehicle is a train that moves on a track.

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