Car battery

Abstract

To improve a protection function for an on-vehicle battery and occupants.SOLUTION: An on-vehicle battery disposed below a rear seat includes: a storage case having an opening; a battery module stored in the storage case; a first cover which has an arrangement part and is attached to the storage case in a state that the first cover covers the opening; a battery control unit arranged at the arrangement part at the upper side of the first cover; and a second cover which covers the battery control unit. The storage case and the first cover form a sealed space and the battery module is disposed in the sealed space.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to the technical field of on-board batteries that are installed in vehicles such as automobiles. [Background technology]

[0002] 2. Description of the Related Art Various vehicles such as automobiles are equipped with on-board batteries for supplying power to motors and various electrical components.

[0003] In recent years, vehicles such as electric vehicles and hybrid electric vehicles have become more widespread, and these electrically powered vehicles are equipped with on-board batteries that have a high power storage function (see Patent Document 1).

[0004] An in-vehicle battery is provided with a storage case and a battery module stored in the storage case. The battery module is configured by arranging a plurality of battery cells (secondary batteries), such as nickel-metal hydride batteries or lithium-ion batteries.

[0005] The vehicle battery described in Patent Document 1 is attached to the vehicle body below the floor panel, and a storage case houses multiple battery modules and a battery control unit that controls the battery modules. The battery modules and battery control unit are arranged in a space formed by a bottom plate and a battery case (cover), and the battery control unit is arranged above the battery modules via a support base. The battery modules are high-voltage parts since they are driven by a high voltage, and the battery control unit is a low-voltage part since it is driven by a lower voltage than the battery modules, and has the function of monitoring and controlling the battery modules. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2019-147423 A Summary of the Invention [Problem to be solved by the invention]

[0007] However, if a vehicle should collide and the impact of the collision is applied to the vehicle battery, gas may be generated from the battery module, which is a high-voltage part. If gas is generated, the gas may affect the battery control unit, which is a low-voltage part, due to its high temperature, and may interfere with the battery control unit's monitoring and control functions for the battery module, causing the battery module to remain in a high-voltage state, which may result in a short circuit or the like.

[0008] Furthermore, if gas generated from the battery module is released outside the vehicle battery case and flows into the vehicle cabin, it may also affect vehicle occupants.

[0009] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to improve the protection function of an on-board battery and passengers. [Means for solving the problem]

[0010] The vehicle battery according to the present invention is an in-vehicle battery disposed under a rear seat, electric A pond module; a storage case having an opening at an upper portion and storing the battery module through the opening; The opening is provided in the storage case. From above The battery module is provided with a first cover attached in a covering state, a battery control unit arranged in the arrangement section above the first cover, and a second cover covering the battery control unit, wherein an enclosed space is formed by the storage case and the first cover, and the battery module is arranged in the enclosed space. Effect of the Invention

[0011] According to the present invention, the battery module is disposed in a sealed space inside the storage case, and the battery control unit is disposed in the space outside the sealed space. Therefore, even if gas is generated in the battery module in the event of a collision or the like, the generated gas is not released to the outside from the sealed space, and the gas does not affect the battery control unit or occupants, thereby enhancing the protection function for the vehicle battery and occupants. [Brief description of the drawings]

[0012] [Figure 1] 2 to 7 show an embodiment of an on-vehicle battery according to the present invention, and this figure shows the configuration of a vehicle. [Diagram 2] FIG. [Diagram 3] 1 is a cross-sectional view conceptually showing the configuration of an in-vehicle battery, etc., as viewed from the front. [Figure 4] FIG. 2 is an exploded perspective view of an in-vehicle battery. [Diagram 5] 1 is a cross-sectional view conceptually showing a configuration of an in-vehicle battery, etc., as viewed from the side. [Figure 6] 4 is a cross-sectional view conceptually showing a state in which a battery module is deformed when a vehicle is hit from the left or right, as viewed from the front. FIG. [Figure 7] FIG. 2 is a perspective view showing a state in which the vehicle battery is attached to a vehicle body. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] <Vehicle Overview> First, a schematic configuration of a vehicle on which an on-board battery according to the present invention is mounted will be described (see FIG. 1).

[0014] The vehicle 100 is, for example, a hybrid vehicle that runs on at least one of fuel (gasoline) power and electrical power, but the vehicle 100 may also be an electric vehicle that runs only on electrical power.

[0015] The vehicle 100 is equipped with a power source 110, an accelerator opening sensor 120, a speed sensor 130, a control unit 140, and an on-board battery 1.

[0016] The power source 110 includes an engine 111 (internal combustion engine) and a drive motor 112 (electric motor). Therefore, the vehicle 100 can have two drive modes: a hybrid drive mode using both the engine 111 and the drive motor 112 as power sources, and a motor drive mode using only the drive motor 112 as power sources, and the two drive modes can be switched depending on the driving conditions, etc. However, the vehicle 100 may also be able to have an engine drive mode using only the engine 111 as power sources.

[0017] The accelerator opening sensor 120 detects the accelerator opening corresponding to the driving force of the vehicle 100 required by the driver, that is, the amount of depression of the accelerator pedal by the driver. The accelerator opening detected by the accelerator opening sensor 120 is output to the control unit 140 as a detection signal.

[0018] The speed sensor 130 detects the speed of the vehicle 100. The speed of the vehicle 100 detected by the speed sensor 130 is output to the control unit 140 as a detection signal.

[0019] The control unit 140 has the function of comprehensively controlling the operation of each unit in the vehicle 100 and performing various arithmetic processing. The control unit 140 has a microprocessor that performs calculations, a ROM (Read Only Memory) that stores programs and the like for causing the microprocessor to execute each process, a RAM (Random Access Memory) that stores various data such as the results of calculations, and an interface for inputting or outputting data.

[0020] The control unit 140 includes an engine control unit 141 that controls the engine 111 , a motor control unit 142 that controls the drive motor 112 , and a mode switching unit 143 that switches the driving mode of the vehicle 100 .

[0021] The engine control unit 141 is a part that operates as an ECU (Engine Control Unit). The motor control unit 142 has a function of controlling, for example, the driving operation of the wheels of the vehicle 100 by the drive motor 112 and the regenerative operation of the drive motor 112. The mode switching unit 143 switches between two types of driving modes, a hybrid driving mode in which both the engine 111 and the drive motor 112 are powered, and a motor driving mode in which only the drive motor 112 is powered, based on the speed, acceleration, etc. of the vehicle 100.

[0022] The in-vehicle battery 1 has a battery module that stores power used in the vehicle 100, for example, power used in the drive motor 112, as well as power used in the control unit 140, various parts of the vehicle 100 that are operated by power, and various lights provided in the vehicle 100. For example, secondary batteries such as nickel-metal hydride batteries and lithium-ion batteries are used as the batteries in the battery module. In addition to power obtained by charging from outside the vehicle 100 (charging power), the in-vehicle battery 1 stores regenerative power supplied from the drive motor 112, for example.

[0023] <Body outline> Next, a schematic configuration of the lower rear portion of the vehicle body 50 will be described (see Figs. 2 and 3).

[0024] The vehicle body 50 has a floor pan 51, a front floor panel 52, a rear floor panel 53, and side frames 54, 54.

[0025] The floor pan 51 is a portion located below the rear seat, which will be described later. The floor pan 51 is provided with a mounting portion 55 formed in a horizontally long rectangular shape, and the inner portion of the mounting portion 55 is formed as an insertion hole 55a that penetrates vertically. The upper surface portion of the mounting portion 55 is provided as a fastening frame portion 55b formed in a rectangular shape.

[0026] The front floor panel 52 is provided continuous with the front side of the floor pan 51, and its central portion in the left-right direction is provided as a protruding portion 52a that protrudes upward. The protruding portion 52a is formed in a tunnel shape having spaces that are open downward and to the front and rear, and its rear end is continuous with the front portion of the mounting portion 55.

[0027] The rear floor panel 53 is provided contiguous with the rear side of the floor pan 51.

[0028] The side frames 54, 54 are positioned on the left and right of the portion spanning the front floor panel 52, the floor pan 51 and the rear floor panel 53, respectively, and are inclined so that the intermediate portion in the fore-and-aft direction is displaced upward toward the rear.

[0029] The vehicle 100 is provided with a power transmission mechanism (not shown) including a propeller shaft 56 for transmitting power from the engine 111 to the wheels. At least a portion of the propeller shaft 56 is disposed inside the protruding portion 52a on the underside of the vehicle body 50. At least a portion of an exhaust pipe 57 for discharging gases emitted when the vehicle 100 is running is also disposed inside the protruding portion 52a.

[0030] <Automotive batteries, etc.> Next, the vehicle battery 1 will be described (see Figs. 3 to 7).

[0031] The vehicle battery 1 has a storage case 2 formed into a horizontally elongated box shape with an opening at the top, a first cover 3 that covers the opening of the storage case 2 from above, a second cover 4 attached to the first cover 3, and various required parts arranged inside (see Figures 3 to 5).

[0032] A fastening flange 2a is provided that protrudes outward from the upper end of the storage case 2. The storage case 2 has battery storage sections 5, 5 positioned separately on the left and right and an intermediate section 6 positioned between the battery storage sections 5, 5, with the intermediate section 6 continuing to the upper ends of the battery storage sections 5, 5. Therefore, a recessed section 2b that is open forward, backward, and downward is formed below the intermediate section 6 in the storage case 2.

[0033] The battery storage section 5 is composed of a front section 7, a rear section 8, side sections 9 and 10, and a bottom section 11, and is open upward. The upper end of the outer side section 9 is positioned higher than the upper end of the inner side section 10, and the height of the side section 9 is higher than the height of the side section 10. A first insertion hole 7a penetrating from front to rear is formed in the lower end of the front section 7.

[0034] The middle section 6 is composed of a front section 12, a rear section 13, and a bottom section 14, with the front section 12 and the front section 7 of the battery housing section 5 being positioned on the same plane, and the rear section 13 and the rear section 8 of the battery housing section 5 being positioned on the same plane. The left and right side edges of the bottom section 14 are continuous with the upper edges of the side sections 10, 10 of the battery housing sections 5, 5, respectively. The bottom section 14 is formed with an exhaust hole 14a that penetrates vertically.

[0035] A pressure valve 15 is attached to the underside of the bottom portion 14 (see FIG. 3). The pressure valve 15 is attached to the bottom portion 14 in a state where it covers the exhaust hole 14a, and has the function of opening when the internal pressure of the vehicle battery 1 rises above a certain level, thereby reducing the internal pressure.

[0036] The first cover 3 is formed in a horizontally long rectangular shape, and its outer shape is the same as or slightly smaller than the fastening flange portion 2a of the storage case 2 (see Figs. 3 to 5). A concave arrangement portion 3a that opens upward is formed in the center of the first cover 3 in the left-right direction, and the arrangement portion 3a is formed in a position closer to the front side of the first cover 3. A second insertion hole 3b that penetrates vertically is formed in the first cover 3, and the second insertion hole 3b is located in the arrangement portion 3a or in the vicinity of the arrangement portion 3a.

[0037] The first cover 3 is provided with upwardly expanding bulging portions 3c, 3c, 3c on both the left and right sides and behind the mounting portion 3a.

[0038] The second cover 4 has an outer shape smaller than that of the first cover 3, and is attached from above to the first cover 3. The second cover 4 is formed in a box shape that is open downward, and is formed in a size sufficient to cover the arrangement portion 3a and the second insertion hole 3b.

[0039] Each of the battery storage sections 5, 5 of the storage case 2 stores, for example, three battery modules 16, 16, .... The battery module 16 stores a plurality of secondary batteries such as nickel-metal hydride batteries or lithium-ion batteries inside the case. The number of battery modules 16 stored in the storage case 2 is arbitrary, and it is sufficient that at least one battery module 16 is stored in each of the battery storage sections 5, 5 of the storage case 2, spaced apart from each other on the left and right.

[0040] Reinforcing members 17, 17 are fixed to the battery storage sections 5, 5 of the storage case 2, respectively (see Figs. 3 and 4). The reinforcing members 17 are made of a high-strength metal material and are formed in a shape extending in the left and right directions, and both left and right ends are fixed to the side surface sections 9 and 10 above the battery modules 16, 16, 16 by bolts, welding, or the like.

[0041] Therefore, since the reinforcing member 17 reinforces the battery storage section 5 in the left-right direction, deformation of the battery storage section 5 is suppressed in the unlikely event that the vehicle 100 collides from the left-right direction, and the battery module 16 can be protected.

[0042] It should be noted that a plurality of reinforcing members 17 may be fixed to the battery storage section 5, for example, at intervals in the front and rear directions.

[0043] Furthermore, in the unlikely event that the vehicle 100 collides from the left or right, if the impact of the collision is large, the battery storage section 5 may be significantly deformed (see FIG. 6). However, since the storage case 2 has a recessed section 2b formed in the center in the left-right direction and the battery storage sections 5, 5 are located on the left and right of the recessed section 2b, the battery storage section 5 is displaced toward the recessed section 2b and deformed.

[0044] Therefore, although the width of the concave portion 2b in the left-right direction becomes smaller due to the deformation of the battery storage section 5, the deformed battery storage section 5 is less likely to collide with another battery storage section 5, so that the battery module 16 arranged inside the battery storage section 5 is less likely to be damaged, and the battery module 16 can be protected even when the impact of the collision is large.

[0045] A junction box 18 is disposed in the intermediate portion 6 of the storage case 2. The junction box 18 functions as a control device that controls the battery modules 16, 16, .... The junction box 18 is disposed in the intermediate portion 6 at a portion on the rear end side of the bottom portion 14.

[0046] A battery control unit 19 is disposed in the arrangement portion 3a of the first cover 3. The battery control unit 19 is a control device that controls each portion of the vehicle-mounted battery 1, and is a low-voltage portion that is driven at a lower voltage than the battery module 16. Therefore, the battery module 16 is a high-voltage portion that is driven at a higher voltage than the battery control unit 19, and the junction box 18 is also a high-voltage portion that is driven at a higher voltage than the battery control unit 19.

[0047] The first cover 3 is attached to the storage case 2 by fastening, for example, with bolts (not shown), and the outer periphery of the first cover 3 is joined to the fastening flange 2a of the storage case 2 from above (see Figs. 3 to 7). At this time, a seal member 20 such as a rubber seal or weather strip is disposed between the outer periphery of the first cover 3 and the fastening flange 2a of the storage case 2, and the outer periphery of the first cover 3 and the fastening flange 2a are tightly attached via the seal member 20. Therefore, the internal space formed by the storage case 2 and the first cover 3 is formed as an enclosed space 21.

[0048] In this way, a sealed space 21 is formed by the storage case 2 and the first cover 3, and the battery modules 16, 16, ... and the junction box 18, which are all high-voltage parts, are disposed in the sealed space 21. In addition, the battery control unit 19, which is a low-voltage part, is located above the first cover 3, and is therefore disposed outside the sealed space 21.

[0049] When the first cover 3 is attached to the storage case 2, the arrangement portion 3a is located in front of the junction box 18, and the battery control unit 19 arranged in the arrangement portion 3a is located in front of the junction box 18 (see FIG. 5). At this time, since the arrangement portion 3a is formed in a concave shape that opens upward, a part of the battery control unit 19 is placed in a state where it overlaps with the junction box 18 in the horizontal direction, and the lower surface of the battery control unit 19 is located between the upper and lower surfaces of the junction box 18 (see FIGS. 3 and 5).

[0050] When the first cover 3 is attached to the storage case 2, a space is formed in the upper part of the sealed space 21. This space is formed above the reinforcing members 17, 17, and in particular, protected spaces 22, 22 having a certain distance or more in the vertical direction are formed below the left and right bulging parts 3c, 3c of the first cover 3.

[0051] As described above, the junction box 18 is a high-voltage section driven by a high voltage, and the first voltage line 23 for supplying a high voltage is connected to the junction box 18. The first voltage line 23 is, for example, inserted through the first insertion hole 7a formed in one of the battery storage sections 5 of the storage case 2 and connected to the junction box 18. The first voltage line 23 may be divided into an outer part positioned outside the storage case 2 and an inner part positioned inside the storage case 2, in which case a connector (not shown) is attached to the first insertion hole 7a, and one end of the outer part and one end of the inner part are connected to the connector and connected to the junction box 18.

[0052] The battery modules 16, 16, . . . are also high voltage parts that are driven by a high voltage, and the junction box 18 and the battery modules 16, 16, .

[0053] On the other hand, the battery control unit 19 is a low-voltage part that is driven by a voltage lower than that of the junction box 18 and the battery module 16, and a second voltage line 24 for supplying a low voltage is connected to the battery control unit 19. The second voltage line 24 is connected to the battery control unit 19, for example, by being inserted through a first insertion hole 7a formed in the other battery storage part 5 of the storage case 2 and a second insertion hole 3b formed in the first cover 3. Note that, like the first voltage line 23, the second voltage line 24 may also be divided into an outer part positioned outside the storage case 2 and an inner part positioned inside the storage case 2. In this case, a connector (not shown) is attached to the first insertion hole 7a, and one end of the outer part and one end of the inner part are connected to the connector, and are connected to the battery control unit 19.

[0054] As described above, in a state in which the first voltage wire 23 is inserted into the first insertion hole 7a and the second voltage wire 24 is inserted into the first insertion hole 7a and the second insertion hole 3b, gaps may be generated between the first voltage wire 23 and the first insertion hole 7a or between the second voltage wire 24 and the first insertion hole 7a or the second insertion hole 3b. However, these gaps are blocked by a sealing material or the like (not shown).

[0055] With the first cover 3 attached to the storage case 2, the second cover 4 is attached to the first cover 3 by fastening, for example, with bolts (not shown), so that the second cover 4 covers the battery control unit 19 and a part of the second voltage line 24. At this time, a sealing member (not shown), such as a rubber seal or weather strip, may be disposed between the outer periphery of the second cover 4 and the upper surface of the first cover 3, so that the outer periphery of the second cover 4 and the upper surface of the first cover 3 are closely attached to each other via the sealing member.

[0056] <Installation status of the vehicle battery to the vehicle body, etc.> The vehicle battery 1 configured as described above is attached to the vehicle body 50 with bolts or the like (see FIG. 7). The vehicle battery 1 is attached to the vehicle body 50 by inserting the portion of the storage case 2 below the fastening flange portion 2a from above into an insertion hole 55a formed in the mounting portion 55 of the floor pan 51, and fastening the fastening flange portion 2a to the fastening frame portion 55b with bolts or the like.

[0057] When the vehicle battery 1 is attached to the floor pan 51 of the vehicle body 50 as described above, at least a portion of the storage case 2 protrudes downward from the vehicle body 50, and at least a portion of the propeller shaft 56 and the exhaust pipe 57 are inserted and positioned in the recessed portion 2b of the storage case 2.

[0058] With the vehicle battery 1 attached to the floor pan 51, a rear seat 40 is attached to the vehicle body 50 (see FIGS. 3 and 5). The rear seat 40 has a seat cushion 41 on which a passenger sits and a backrest 42 that functions as a backrest.

[0059] The rear seat 40 is attached to the vehicle body 50 at a position directly above the vehicle battery 1. For example, if the rear seat 40 is a three-seater, the battery modules 16, 16, ... are positioned directly below the areas where the left and right passengers sit, and the junction box 18 and battery control unit 19 are positioned directly below the area where the center passenger sits (see Figure 3).

[0060] <Condition of vehicle batteries during vehicle collisions, etc.> In the event of a collision occurring in the vehicle 100, the impact of the collision may be applied to the vehicle battery 1, causing high-temperature gas to be generated from the battery module 16, which is a high-voltage part. When gas is generated, the generated gas fills the inside of the storage case 2, but since the battery module 16, which is the source of the gas, is disposed in the sealed space 21, the gas is not released from the sealed space 21 to the outside except when the pressure valve 15 is operated, which will be described later. Therefore, the gas does not enter the space formed by the first cover 3 and the second cover 4 in which the battery control unit 19 is disposed, and the gas does not affect the battery control unit 19, which is a low-voltage part, and the normal operating state of the battery control unit 19 is ensured.

[0061] Since the normal operating state of the battery control unit 19 is ensured, the monitoring and control functions of the battery control unit 19 for the battery module 16 are maintained, and the function of stopping or suppressing the operating state of the battery module 16 is executed through control by the battery control unit 19.

[0062] If the gas generated in the battery module 16 fills the sealed space 21, there is a possibility that the internal pressure of the sealed space 21 will rise significantly, but in this case, the pressure valve 15 will open and the gas will be exhausted to the outside of the vehicle 100 from the exhaust hole 14a formed in the bottom surface portion 14 of the middle portion 6. Therefore, the internal pressure of the sealed space 21 is restricted from rising above a certain level, and deformation or damage to the storage case 2, the first cover 3, etc. is prevented.

[0063] Furthermore, since the gas generated in the battery module 16 is not released from the sealed space 21 into the vehicle interior, the gas does not flow into the vehicle interior and the gas does not affect the passengers, thereby protecting the passengers.

[0064] During a frontal collision of the vehicle 100, a downward force is applied to the occupant, and there is a possibility that an external force from above may be applied from the occupant to the vehicle-mounted battery 1 due to a so-called submarine state, but a protective space 22 is formed under the first cover 3. Therefore, the external force applied from the occupant to the vehicle-mounted battery 1 is absorbed by the protective space 22, and the external force is unlikely to be applied to the battery module 16, which is a high-voltage part, and leakage, short circuit, electric shock, etc. can be prevented.

[0065] In addition, when an external force is applied from above to the vehicle battery 1 by an occupant due to the submarine state during a frontal collision of the vehicle 100, there is a possibility that the external force will reach the battery control unit 19 through the second cover 4; however, since the battery control unit 19 is a low-voltage part, the impact on the occupant is small.

[0066] <Summary> As described above, the vehicle battery 1 comprises a storage case 2 that is open upward, a battery module 16 stored in the storage case 2, a first cover 3 that has a placement section 3a and is attached to the storage case 2, a battery control unit 19 that is arranged in the placement section 3a above the first cover 3, and a second cover 4 that covers the battery control unit 19, with an enclosed space 21 formed by the storage case 2 and the first cover 3, and the battery module 16 being arranged in the enclosed space 21.

[0067] Therefore, because the battery module 16 is disposed in the sealed space 21 inside the storage case 2 and the battery control unit 19 is disposed in the space outside the sealed space 21, even if gas is generated in the battery module 16 in the unlikely event of a collision of the vehicle 100, the generated gas will not be released to the outside from the sealed space 21. This prevents the gas from affecting the battery control unit 19 or passengers, thereby improving the protection function for the in-vehicle battery 1 and passengers.

[0068] The placement portion 3a is located in the center in the left-right direction and is formed in a recessed shape that opens upward.

[0069] Therefore, since the battery control unit 19 is positioned in the center in the left-right direction and close to the bottom portion 14 of the storage case 2, when a load is applied to the battery control unit 19 from above, it is difficult for a load to be generated in the battery module 16, which is a high-voltage part, so that the battery module 16 can be protected and the vehicle battery 1 can be made smaller in the up-down direction.

[0070] Furthermore, the storage case 2 is attached to the vehicle body 50, an insertion hole 55a is formed in the vehicle body 50, and the storage case 2 is inserted into the insertion hole 55a so that at least a portion of the storage case 2 protrudes downward from the vehicle body 50.

[0071] Therefore, it is possible to arrange the vehicle-mounted battery 1 under the rear seat 40 without raising the position of the rear seat 40, making it unnecessary to change the design regarding the position of the rear seat 40 and allowing the vehicle-mounted battery 1 to be arranged in a desired position without narrowing the vehicle interior.

[0072] Furthermore, the storage case 2 is provided with two battery storage sections 5, 5 positioned at a distance from each other on the left and right, and an intermediate section 6 positioned between the two battery storage sections 5, 5, the bottom section 11 of the battery storage section 5 is positioned lower than the bottom section 14 of the intermediate section 6, and of the first voltage wire 23 and the second voltage wire 24 which supply different magnitudes of voltage, the first voltage wire 23 is positioned in one of the battery storage sections 5 and the second voltage wire 24 is positioned in the other battery storage section 5.

[0073] Therefore, since the first voltage line 23 and the second voltage line 24, which supply voltages of different magnitudes, are arranged at positions spaced apart from each other on the left and right inside the storage case 2, the effects of noise between the first voltage line 23 and the second voltage line 24 can be suppressed. [Explanation of symbols]

[0074] 50 Body 55a Insertion hole 1. Car battery 2 Storage Case 3 First Cover 3a Placement part 4. Second Cover 5 Battery Compartment 6. Middle Section 9 Side part 10 Side part 11 Bottom part 14 Bottom part 16 Battery Module 17 Reinforcement members 19 Battery control unit 21 Closed space 23 First voltage line 24 Second voltage line 40 Rear seat

Claims

1. An in-vehicle battery disposed under a rear seat, A battery module; a storage case having an opening at an upper portion and storing the battery module through the opening; a first cover having an arrangement portion and attached to the storage case in a state of covering the opening from above; a battery control unit disposed in the arrangement portion above the first cover; a second cover that covers the battery control unit; a sealed space is formed by the storage case and the first cover, The battery module is disposed in the sealed space. Car battery.

2. The first cover covers approximately the outer shape of the storage case, The arrangement portion is integrally formed on the upper side of the first cover.

2. The vehicle battery according to claim 1.

3. The battery control unit is formed as a low-voltage part that is driven at a voltage lower than that of the battery module.

3. The vehicle battery according to claim 1 or 2.

4. The storage case is provided with two battery storage sections spaced apart from each other on the left and right sides and a middle section located between the two battery storage sections, a bottom surface of the battery storage section is located below a bottom surface of the intermediate section; Of a first voltage line and a second voltage line which supply different voltages, the first voltage line is disposed in one of the battery storage sections and the second voltage line is disposed in the other battery storage section.

4. The vehicle battery according to claim 1, 2 or 3.

5. Two reinforcing members extending in the left-right direction are disposed inside the storage case, The left and right ends of the reinforcing member are fixed to the left and right side portions that form the battery storage portion on the upper side of the battery module.

5. The vehicle battery according to claim 4.

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