JP2015011850A - On-vehicle power supply device, and vehicle provided with the power supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide such a power supply device that the centroid thereof is located at an electrolyte vessel of a lead battery or a housing case of the auxiliary battery, the vessel and the case being located at the center of the power supply device, in the power supply device in which the auxiliary battery is coupled to the lead battery to form an integral configuration.SOLUTION: A power supply device comprises: a lead battery 10 in which lead battery cells 11 are housed in a plurality of electrolyte vessels 36, respectively; an auxiliary battery 20 housed in a housing space 35 for the auxiliary battery in a state that a plurality of power storage elements 21 connected in series are housed in an inner case; a pair of output terminals 12 for outputting a power of the lead battery 10; and lead parts 14 connected to the auxiliary battery 20 and the pair of output terminals 12, and parallel-connecting the lead battery 10 to the auxiliary battery 20. The centroid is located at the electrolyte vessel 36 or the housing space 35 for the auxiliary battery located at a central part of the housing case 30 in which the plurality of electrolyte vessels 36 and the housing space 35 for the auxiliary battery are coupled.

Description

  The present invention relates to an in-vehicle power supply device and a vehicle including the same, and more particularly to a vehicle power supply device in which an auxiliary battery is connected in parallel with a lead battery and a vehicle including the same.

  In a vehicle that performs regenerative braking, the alternator is driven by kinetic energy when the vehicle decelerates, and the electric power generated by the alternator is stored in a battery. When waiting for a signal or the like, the engine idling is stopped to improve fuel efficiency, and when the engine is restarted, the electric power stored in the battery is supplied to the starter motor. As such a battery, a lead battery having a rated voltage of 12V is known. The lead battery supplies electric power to various electrical devices, and is rapidly charged every time regenerative braking is performed, and is rapidly discharged when the engine is restarted, so that its life is short.

  In order to solve such a problem, a power supply device in which a lithium ion battery is connected in parallel with a lead battery as an auxiliary battery is known (see Patent Document 1). In this power supply device, since both the lead battery and the lithium ion battery are charged during regenerative power generation, the current flowing in the lead battery can be reduced, and when the engine is restarted, both the lead battery and the lithium ion battery are used. Since the electric power is supplied from the lead battery to the starter motor, the current flowing from the lead battery to the starter motor can be reduced.

  In order to prevent an increase in electrical resistance when the lead battery and lithium ion battery are electrically connected, and to reduce the size of the power supply device, the lead battery and the auxiliary battery are integrated into the engine room. May be installed.

JP 2011-208599 A

  Since the auxiliary battery is lighter than the lead battery, the center of gravity of the power supply apparatus that is integrally formed by connecting the auxiliary battery to the lead battery may deviate from the center of the power supply apparatus. For example, when carrying a power supply device having a biased center of gravity with both arms, it is difficult to carry because the load is not evenly applied to both arms. Further, when a power supply device with a biased center of gravity position is attached to the engine room by screwing, the stress that the screwing portion receives from the vehicle during traveling of the vehicle varies depending on the attachment position, and the attachment screw tends to loosen. When the mounting screw is loosened, the power supply device may vibrate, and for example, the storage element of the auxiliary battery may be damaged.

  The present invention has been made in view of such conventional problems. A main object of the present invention is to provide an integrated power supply device in which an auxiliary battery is connected to a lead battery, and the lead battery electrolyte solution tank or auxiliary battery storage case located in the center of the power supply device. A power supply apparatus having a center of gravity is provided.

Means for Solving the Problems and Effects of the Invention

In order to achieve the above object, according to one on-vehicle power supply device of the present invention, in series with a lead battery in which a lead battery cell is housed in each electrolytic solution tank formed in the first housing portion. An auxiliary battery stored in the second storage unit in a state where the plurality of connected storage elements are held by the holding unit;
A pair of output terminals for outputting the power of the lead battery; and a lead portion connected to the auxiliary battery and the pair of output terminals for connecting the lead battery and the auxiliary battery in parallel. The center of gravity is located in the lead electrolyte bath or the second storage part located in the central part of the storage case where the first storage part and the second storage part are connected.

  With the above configuration, when carrying the power supply device, the load of the power supply device is equally applied to both arms, so that the power supply device can be carried in a well-balanced manner without feeling uncomfortable. Furthermore, the screwed portion where the power supply device is screwed to the engine room receives stress from the vehicle while the vehicle is running. Become. Accordingly, it is possible to effectively prevent the mounting screw from loosening and the power supply device from vibrating, for example, from damaging the storage element of the auxiliary battery.

  Further, according to another on-vehicle power supply device, the storage case is integrally molded.

  With the above configuration, the power supply device can be formed compactly, and can be easily carried and attached to the engine room.

  Furthermore, the holding means may be an inner case formed in a box shape.

  With the above configuration, the weight of the auxiliary battery can be easily adjusted, and the heat dissipation effect of the auxiliary battery can be further enhanced.

  Furthermore, six electrolyte baths are formed in the first storage part, the second storage part is connected to one end face of the first storage part, and the first storage part It is also possible to configure the center of gravity to be located in the space of the fourth electrolyte bath as counted from the other end face of the first.

  With the above-described configuration, the weight balance can be appropriately maintained by adjusting the center of gravity to be positioned in the middle electrolyte tank, which is the fourth even when counted from any end face.

  Furthermore, each electrolyte tank formed in the first storage portion and the second storage portion can be approximately equal in size.

  With the above-described configuration, the weight of the auxiliary battery can be easily adjusted so that the center of gravity is located inside the electrolytic solution tank or the second storage portion, which is located in the central portion of the power supply device.

  Furthermore, the auxiliary battery is a lithium ion secondary battery or a nickel metal hydride battery.

  With the above configuration, an efficient auxiliary battery can be obtained.

  Furthermore, it is a vehicle provided with the engine which runs a vehicle, the vehicle main body which mounts the said engine and power supply device, and the power supply device as described in any one of Claims 1-5, Comprising: It drives with the said engine. The vehicle body includes a wheel for running the vehicle body, and the power supply device is disposed in an engine room of the vehicle.

  With the above configuration, the power supply device can be carried while supporting the load of the power supply device evenly with both arms. Furthermore, although the screwing portion in which the power supply device is screwed to the engine room receives stress from the vehicle during traveling of the vehicle, the difference in stress depending on the mounting position is reduced. Accordingly, it is possible to provide a vehicle including the power supply device that can effectively prevent the mounting screw from loosening and the power supply device to vibrate, for example, to damage the power storage element of the auxiliary battery.

BRIEF DESCRIPTION OF THE DRAWINGS It is an external appearance perspective view which shows the power supply device which concerns on Example 1 of this invention. It is a disassembled perspective view of a power supply device. It is a see-through | perspective perspective view of a power supply device. It is the longitudinal cross-sectional view which cut | disconnected the power supply device in the transversal direction. It is the longitudinal cross-sectional view which cut | disconnected the power supply device in the longitudinal direction. It is a model horizontal sectional view which shows the state which has arrange | positioned the power supply device in the engine room of a vehicle. It is an external appearance perspective view which shows the power supply device hold | maintained the electrical storage element assembly of the auxiliary battery with the bracket. It is a figure which shows the example of a system which mounted the power supply device 100 in the vehicle. It is an external appearance perspective view which shows the power supply device which concerns on Example 2 of this invention. It is the longitudinal cross-sectional view which cut | disconnected the power supply device in the longitudinal direction. It is a see-through | perspective perspective view of a power supply device.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiment described below exemplifies a vehicle-mounted power supply device and a vehicle equipped with the power supply device for embodying the technical idea of the present invention, and the present invention is a vehicle-mounted power supply device and power supply. The vehicle provided with the device is not specified as follows. Further, the dimensions, materials, shapes, relative arrangements, and the like of the constituent members described in the embodiments are not intended to limit the scope of the present invention only to the description unless otherwise specified. It is just an example. Note that the size, positional relationship, and the like of the members shown in each drawing may be exaggerated for clarity of explanation. Furthermore, in the following description, the same name and symbol indicate the same or the same members, and detailed description thereof will be omitted as appropriate. Furthermore, each element constituting the present invention may be configured such that a plurality of elements are constituted by the same member and the plurality of elements are shared by one member, and conversely, the function of one member is constituted by a plurality of members. It can also be realized by sharing. In addition, the contents described in some examples and embodiments may be used in other examples and embodiments.
Example 1

  1 is a perspective view of a power supply device 100 for a vehicle according to a first embodiment of the present invention, and FIG. 2 is an exploded perspective view of the power supply device 100. FIG. 3 shows the internal structure of the power supply device 100. FIG. 4 is a longitudinal sectional view of the power supply device 100 cut in the short direction. FIG. 5 is a longitudinal sectional view of the power supply device cut in the longitudinal direction. FIG. 6 is a schematic horizontal sectional view showing a state in which the power supply device 100 is disposed in the engine room 95 of the vehicle 1000. The power supply device 100 includes a lead battery 10, an auxiliary battery 20, and a storage case 30 that stores them. In FIG. 3, the case 30 and the output terminal 12 are indicated by broken lines to show the internal structure, and the cover part 42 (the cover part 42 will be described later) is omitted.

The storage case 30 is formed in a box shape by using a resin having excellent insulating properties and a resin having excellent chemical resistance in order to fill the inside with an electrolyte such as dilute sulfuric acid. It should be noted that the outer shape and size of the storage case 30 can be easily replaced with the power supply device 100 by making the outer shape and size substantially the same as those of an existing in-vehicle 12V lead battery.
The storage case 30 includes a bottomed box-like case main body 32 having an open upper surface, and a lid portion 31 that closes the upper surface of the case main body 32. The lead battery 10 and the auxiliary battery 20 are stored in the storage case 30. The lead battery 10 is composed of a lead battery stack in which a plurality of lead battery cells 11 are stacked. The auxiliary battery 20 is configured by electrically connecting a plurality of power storage elements 21 in series.
The lead battery 10 is connected to the positive / negative output terminal 12 via a conductive member (not shown), and the auxiliary battery 20 is connected to the positive / negative output terminal 12 via a lead portion 14 described later.

  The lead portion 14 is made of a member such as metal having excellent conductivity, and the lead battery 10 and the auxiliary battery 20 are electrically connected in parallel via the lead portion 14. When the auxiliary battery terminal is provided in the auxiliary battery 20, the lead portion 14 is configured to electrically connect the auxiliary battery terminal and the positive / negative output terminal 12.

  A circuit unit 40 is interposed between the lead battery 10 and the auxiliary battery 20. The circuit unit 40 is disposed on the upper surface of the lid unit 31 and includes a protection circuit that monitors the voltage, current, temperature, and the like of the auxiliary battery 20 and shuts off the circuit when an abnormality occurs.

  As shown in FIG. 2, the storage case 30 in which the auxiliary battery 20 is stored is provided in a part of the storage case 30 in which the lead battery 10 is stored. It includes a plurality of electrolyte baths 36 that are parts and a storage space 35 that is a second storage part. By storing the lead battery 10 and the auxiliary battery 20 in one storage case 30, the power supply device can be made compact, and can be easily carried and attached to the engine room.

In addition, the electrolytic solution tank 36 in which the lead battery cell 11 of the lead battery 10 is stored and the storage space 35 in which the auxiliary battery 20 is stored are not limited to those integrated and integrally formed. The electrolytic solution tank 36 in which the lead battery cell 11 is stored and the storage space 35 in which the auxiliary battery 20 is stored may be formed separately and connected by screws or the like.
(Partition wall 34)

In the storage case 30, a partition is formed in order to partition the electrolyte tanks 36 into which the electrolyte solution of the lead battery 10 is injected, or to partition the storage space 35 for storing the auxiliary battery and the electrolyte tank 36. A wall 34 is provided. The partition wall 34 is preferably composed of an insulating member, and is integrally formed with the storage case main body 32, for example.
(Lead battery 10)

The electrode body of the lead battery cell 11 has a rectangular outer shape, a thin thickness that is thinner than the dimension in the width direction, and indicates a battery as a unit of a power generation element composed of an electrolytic solution, an electrode plate, and the like. The lead battery 10 basically uses the configuration of an existing in-vehicle 12V lead battery. That is, a structure in which six lead battery cells 11 having a rated voltage of 2 V are stacked and connected in series is used.
Even if the auxiliary battery 20 is stacked on the lead battery 10, the thickness of the lead battery cell 11 is slightly reduced so as to be approximately the same size as an existing in-vehicle 12V lead battery. Thereby, the size of the power supply apparatus 100 which integrated the auxiliary | assistant battery 20 in the lead battery 10 can be made into the substantially same grade as the existing vehicle-mounted 12V lead battery. For example, by setting the thickness of the lead battery cell 11 to 6/7 as compared with the conventional one, the power supply device 100 having substantially the same size as that of an existing in-vehicle 12V lead battery can be obtained, and the storage space for the auxiliary battery 20 can be obtained. 25 can be secured.
(Auxiliary battery 20)

  The auxiliary battery 20 has a plurality of power storage elements 21 arranged on substantially the same plane. As shown in FIG. 4, the power storage element 21 is a member that can store power, and a secondary battery cell is used. As the secondary battery cell, a nickel metal hydride battery can be suitably used. Since the power supply voltage of the nickel metal hydride battery is 1.2V, it becomes 12V when 10 nickel metal hydride batteries are connected in series, and is suitable for parallel connection with the lead battery 10 having a power supply voltage of 12V. The nickel metal hydride battery connects two battery cells in the longitudinal direction to form a storage element set 21a. A storage element assembly is configured by arranging five storage element groups 21a in parallel on the same plane. That is, the power storage element assembly is composed of a total of ten nickel metal hydride batteries. With this configuration, the auxiliary battery 20 that is thin in the vertical direction is formed.

    In addition, although the structure which used the electrical storage element 21 as a nickel metal hydride battery was demonstrated, secondary batteries, such as a lithium ion battery, can also be used. Alternatively, a storage element such as an electrolytic double capacitor can be used.

  By adjusting the number of power storage elements 21 connected in series, the voltage of the auxiliary battery 20 can be adjusted to coincide with the voltage of the lead battery 10 to be connected. For example, a lead battery having a rated voltage of 24 V, such as a large vehicle such as a truck, can be handled by connecting 20 secondary batteries of nickel-metal hydride batteries in series. In this way, the output voltage can be adjusted by multiples of 12V by connecting 10N (n is a natural number) in series, such as 36V, 48V, etc. It can be adapted to the standardized power supply voltage.

  Moreover, when using a cylindrical secondary battery cell for the electrical storage element 21, it is preferable to arrange | position each secondary battery cell in a horizontal attitude | position. Thereby, the safety valve provided in each secondary battery cell can be operated reliably. A secondary battery cell using a cylindrical outer can generally has a safety valve on one end surface of the cylindrical shape that opens in response to an increase in internal pressure of the outer can. In the case of this structure, when the cylindrical secondary battery cell is placed vertically with the posture where the safety valve faces the bottom surface, the electrolyte filled in the outer can accumulates in the vicinity of the safety valve, and the safety valve opens. When doing so, the electrolyte may block some of the opening area of the safety valve. In particular, when connecting the secondary battery cells in series, the direction of the longitudinal direction is switched in order to shorten the bus bar 24 (the bus bar 24 will be described later) for connecting the secondary battery cells. For this reason, when a secondary battery cell is placed vertically, a situation may occur in which the safety valve of any secondary battery cell faces the bottom surface. Therefore, as described above, the secondary battery cell is held by the inner case 21 and the bracket 37 (the bracket 37 will be described later) so that the secondary battery cell is in a horizontal posture, thereby avoiding such a situation and opening the safety valve. In this case, the reliability of the operation of the safety valve can be improved by ensuring the opening.

Hereinafter, a case where a cylindrical nickel-metal hydride battery is used as the storage element 21 will be described. However, the present invention is not limited to the nickel-metal hydride battery. For example, a secondary battery such as a lithium ion battery or a nickel cadmium battery, or an electric double layer capacitor is used. Etc. can also be used. The external shape of the electricity storage element 21 is not limited to a cylindrical shape, and rectangular battery cells, capacitors, and the like can be used. A non-aqueous electrolyte secondary battery such as a lithium ion battery or a lithium polymer battery has a smaller charging resistance than the lead battery 10, is lightweight, and can have a large charge / discharge capacity. Nickel metal hydride batteries have extremely low charging resistance and have excellent large current charging characteristics.
(Bus bar 24)

  The plurality of power storage elements 21 are housed in the inner case 22. Furthermore, in the state accommodated in the inner case 22, the electricity storage elements 21 are electrically connected by the bus bar 24. The bus bar 24 is made of a material having excellent conductivity such as a metal plate. Further, the auxiliary battery 20 in which the plurality of power storage elements 21 are connected in series is monitored by detecting an intermediate potential by a monitoring circuit mounted on the circuit unit 40. For example, when a lithium ion battery is used for the storage element 21, the voltage of each storage element 21 is preferably monitored. Therefore, each bus bar 24 is individually wired with the circuit unit 40.

  The circuit unit 40 includes a circuit board 41. The circuit board 41 is provided with a terminal connector 46 on one side of the side surface in the longitudinal direction as a shape extending in one direction. The terminal connector 46 is connected to the shunt resistor 28 and the fuse 29 provided on the bus bar 25 or the signal line of the thermistor 27 provided on the bus bar 24. When the circuit unit 40 is arranged so as to be unevenly distributed from the center of the storage case 30 to one side surface side, the terminal connector 46 is preferably provided on the side surface near the edge of the front surface of the storage case 30.

Note that the lead battery 10 has a large amount of electrolyte and has a larger heat capacity than the auxiliary battery 20, and therefore the temperature of the lead battery 10 is relatively lower than that of the auxiliary battery 20.
(Inner case 22)

  The inner case 22 is formed of a material having excellent insulating properties, such as a resin. The inner case 22 has an outer shape formed in a box shape and includes a space in which the power storage element assembly can be stored. The main surface of the inner case 22 is formed to have a size substantially equal to or smaller than the main surface of the electrode body of the rectangular lead battery cell 11. Thereby, when the auxiliary battery 20 is laminated with the lead battery 10, the outer shape can be made into a compact block shape.

By storing the storage element 21 of the auxiliary battery 20 in the inner case 22, the weight of the entire auxiliary battery 20 including the inner case 22 can be increased. For example, the auxiliary battery 20 can have substantially the same weight as the lead battery cell 11 by increasing the thickness of the wall portion constituting the inner case 22.

  In this way, for example, when six lead battery cells 11 are installed in the lead battery 20, the center of gravity of the power supply apparatus 100 can be positioned inside the lead battery cell 11 located in the center of the power supply apparatus 100. it can. When such a power supply device 100 is held with both hands, the load of the power supply device 100 is equally applied to both arms, so that there is no sense of incongruity. When the power supply apparatus 100 is carried, it is easy to carry because both arms are equally loaded.

  When the power supply device 100 is attached to the engine room 95 by screwing, the stress received from the vehicle 1000 while the screwing portion of the power supply device 100 is traveling is less varied depending on the screwing position. Accordingly, for example, it is possible to prevent some of the mounting screws from being overstressed and loosened, and the power supply apparatus 1000 can be prevented from being damaged by the vibration generated in the power supply apparatus 1000 or falling off the engine room 95.

  The inner case 22 may be provided with opening windows 26 at a plurality of locations as shown in FIG. By providing the opening window 26, the weight of the auxiliary battery 20 can be finely adjusted, and by allowing the electricity storage element 21 to be partially exposed from the opening window 26, the heat dissipation of the electricity storage element 21 can also be improved. .

  As shown in the schematic plan view of FIG. 6, when the power supply apparatus 100 is disposed in the engine room 95, the auxiliary battery 20 is preferably located on the side away from the engine 96. Thereby, it is possible to prevent the auxiliary battery 20 from being directly exposed to the heat of the engine 96.

As shown in FIG. 7, a bracket 37 that mechanically connects the power storage elements 21 to each other via a bus bar 24 and the like and further holds the power storage element assembly without providing the inner case 22 on the inner wall of the storage case 30. It can also be provided. With such a configuration, for example, the weight of the auxiliary battery 20 can be easily adjusted by adjusting the thickness of the bracket 37. Further, in this case, since the electricity storage element 21 is not housed in the inner case 22, the heat dissipation of the auxiliary battery 20 can be further enhanced.
(circuit diagram)

  FIG. 8 shows an example of a system in which the power supply device 100 is mounted on a vehicle 1000. The engine 96 drives wheels 97. The lead battery 10 and the auxiliary battery 20 are electrically connected in parallel, and a blocking mechanism 60 that temporarily disconnects the circuit is provided between the lead battery 10 and the auxiliary battery 20. The lead battery 10 and the auxiliary battery 20 are connected in parallel at the lead part 14 via the lead battery cutoff switch 61 and the auxiliary battery cutoff switch 62, respectively. The voltage of the battery 20 becomes equal. As such a cut-off switch, a switching element such as a relay or a semiconductor switching element is used. Further, the ON / OFF switching control of the cutoff switch is performed by a control circuit 48 provided in the circuit unit 40.

  The power supply apparatus 100 is preferably mounted on a vehicle 1000 that performs regenerative braking and idling stop. The power supply device 100 includes a lead battery 10 and an auxiliary battery 20. Electric power generated by the regenerative braking by the alternator 52 is stored in both the lead battery 10 and the auxiliary battery 20. Electric power from the lead battery 10 and the auxiliary battery 20 is supplied to the starter motor 54 and the electrical equipment 50 that start the engine 96 of the vehicle.

The vehicle that is idling stopped improves the fuel efficiency by stopping the engine 96 while waiting for a signal or the like while the ignition switch as the main switch is on. Electric power is supplied to the starter motor 54 to restart the engine 96. Note that the vehicle that performs regenerative braking and idling stops includes a large alternator 52, and the alternator 52 is also used as a motor that restarts the engine 96.
(Example 2)

  FIG. 9 is an external perspective view showing a power supply apparatus 200 according to Embodiment 2 of the present invention. FIG. 10 is a longitudinal sectional view of the power supply device 200 cut in the longitudinal direction. FIG. 11 is a perspective view of the power supply device 200. The lead battery stack may be divided into two so that the number of lead battery cells 11 is the same, and the auxiliary battery 20 may be disposed between the two lead battery stacks. The in-vehicle 12V lead battery uses six lead battery cells 11 with a rated voltage of 2V per cell to obtain an output of a total voltage of 12V, but is divided into seven compartments by the partition wall 34. A partition space located fourth from the end of the storage case 30 is used as a storage space 35 for the auxiliary battery, and the auxiliary battery 20 is stored therein.

By installing the auxiliary battery 20 in the center of the power supply device 200 in this way, the center of gravity can be reliably positioned inside the storage space 35 in which the auxiliary battery 20 is stored. At this time, the auxiliary battery 20 is a battery in which the power storage element assembly is housed in the inner case 22, a battery storage element assembly that is held by the bracket 37, or a battery in which the power storage element assembly is installed by another configuration. But it ’s okay. Further, the auxiliary battery 20 may be lighter than the lead battery cell 11 of the lead battery 10.

  The electrolytic solution tank 36 is filled with an electrolytic solution such as dilute sulfuric acid and has a high heat absorption effect. By sandwiching the auxiliary battery 20 between the lead battery cells 11, the heat generated by the auxiliary battery 20 is supplied to the electrolytic solution. Can be absorbed. Furthermore, it is possible to effectively prevent the auxiliary battery 20 from overheating due to heat generated by the engine 96 and other devices installed in the engine room 95. Further, there is an advantage that it is not necessary to be aware of the direction of the power supply device 200 when the power supply device 200 is arranged in the engine room 95 of the vehicle.

  The vehicle power supply device and the vehicle including the power supply device according to the present invention can be suitably used as an electric equipment battery or an auxiliary battery of the vehicle. In particular, when applied to a vehicle having an idling stop function for charging a lead battery by regenerative braking, the load of the lead battery can be reduced.

DESCRIPTION OF SYMBOLS 100,200 ... Power supply device 10 ... Lead battery 11 ... Lead battery cell 20 ... Auxiliary battery 12 ... Output terminal; 12 + ... Positive electrode side output terminal; 12 -... Negative electrode side output terminal 14 ... Lead part 21 ... Power storage element; Element set 22 ... Inner case 24, 25 ... Bus bar 26 ... Opening window 27 ... Thermistor 28 ... Shunt resistor 29 ... Fuse 30 ... Storage case 31 ... Lid 32 ... Case body 33 ... Outer wall 34 ... Partition wall 35 ... Storage space 36 ... Electrolyte tank 37 ... Bracket 40 ... Circuit part 41 ... Circuit board 42 ... Cover part 44 ... Terminal part; 44 + ... Positive electrode side terminal part; 44 -... Negative electrode side terminal part 46 ... Terminal connector 48 ... Control circuit 50 ... Electrical equipment 52 ... alternator 54 ... starter motor 60 ... shut-off mechanism 61 ... lead battery shut-off switch 62 ... auxiliary battery shut-off switch 95 ... engine room 96 Engine 97 ... wheel 1000 ... vehicle

Claims (7)

A lead battery in which a lead battery cell is housed in each electrolyte bath formed in the first housing portion;
An auxiliary battery housed in the second housing portion in a state where a plurality of power storage elements connected in series are held by the holding means;
A pair of output terminals for outputting the power of the lead battery;
A lead portion connected to the auxiliary battery and the pair of output terminals, and connecting the lead battery and the auxiliary battery in parallel;
A power supply apparatus in which a center of gravity is located in a lead electrolyte tank or a second storage part located in a central part of a storage case in which the first storage part and the second storage part are connected.   The power supply device according to claim 1, wherein the storage case is integrally molded.   The power supply apparatus according to claim 1, wherein the holding unit is an inner case formed in a box shape. Six electrolyte baths are formed in the first storage portion,
The second storage portion is connected to one end face of the first storage portion;
4. The structure according to claim 1, wherein the center of gravity is positioned in the space of the fourth electrolyte bath as counted from the other end face of the first storage portion. 5. Power supply.   5. The power supply device according to claim 1, wherein the electrolyte tank formed in the first storage portion and the second storage portion are substantially equal in size.   The power supply device according to any one of claims 1 to 5, wherein the auxiliary battery is a lithium ion secondary battery or a nickel metal hydride battery. An engine for running the vehicle;
A vehicle body on which the engine and the power supply device are mounted;
Wheels driven by the engine to run the vehicle body;
A vehicle comprising the power supply device according to any one of claims 1 to 6,
The power supply device is arranged in an engine room of the vehicle.

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