Battery control device

Abstract

To provide a battery control device capable of inhibiting deterioration of a battery by properly determining a deteriorated condition of the battery.SOLUTION: A battery control device according to the present invention controls a charging / discharging operation of a battery formed of a nickel hydrogen battery. The battery control device includes control means for, in a case where a temperature of the battery is less than a prescribed temperature and the total voltage of the battery is less than a prescribed voltage, charging the battery until the total voltage of the battery reaches the prescribed voltage, and, in a case where the temperature of the battery is less than the prescribed temperature, the total voltage of the battery is equal to or greater than the prescribed value, and a positive electrode potential of the battery is less than a prescribed potential, charging the battery until the positive electrode potential of the battery reaches the prescribed potential.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a battery control device. [Background technology]

[0002] Patent Document 1 describes a battery control device that charges a battery until the battery voltage reaches a predetermined voltage when the battery temperature is lower than a predetermined temperature and the battery voltage is lower than a predetermined voltage. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 10-210676 Summary of the Invention [Problem to be solved by the invention]

[0004] The battery control device described in Patent Document 1 determines the deterioration state of the battery only based on the battery voltage, and therefore is unable to appropriately determine the deterioration state of the battery.

[0005] The present invention has been made in view of the above-mentioned problems, and has an object to provide a battery control device that can appropriately determine the deterioration state of a battery and suppress battery deterioration. [Means for solving the problem]

[0006] The battery control device of the present invention is a battery control device that controls the charging and discharging operation of a battery composed of nickel-metal hydride batteries, and is characterized by having a control means that, when the battery temperature is below a predetermined temperature and the total battery voltage is below a predetermined voltage, charges the battery until the total battery voltage reaches the predetermined voltage, and, when the battery temperature is below the predetermined temperature, the total battery voltage is equal to or greater than a predetermined value, and the positive electrode potential of the battery is below a predetermined potential, charges the battery until the positive electrode potential of the battery reaches the predetermined potential. [Effects of the Invention]

[0007] According to the battery control device of the present invention, it is possible to appropriately determine the deterioration state of the battery and suppress the deterioration of the battery. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a block diagram showing the configuration of a battery control device according to one embodiment of the present invention. [Figure 2] FIG. 2 is a flowchart showing the flow of a battery control process according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A battery control device according to an embodiment of the present invention will now be described with reference to the accompanying drawings.

[0010] 〔composition〕 First, with reference to FIG. 1, the configuration of a battery control device according to one embodiment of the present invention will be described.

[0011] FIG. 1 is a block diagram showing the configuration of a battery control device according to one embodiment of the present invention. As shown in FIG. 1, the battery control device 1 according to one embodiment of the present invention is a device that controls the charging and discharging operation of a battery 2 composed of nickel-metal hydride batteries. The battery 2 is mounted on, for example, an electric vehicle. In this embodiment, the battery control device 1 is configured with an information processing device such as a microcomputer, and controls the charging and discharging operation of the battery 2 by executing a control program, which is a computer program. In this embodiment, a temperature sensor 11, a voltage sensor 12, and a potential sensor 13 are connected to the battery control device 1. The temperature sensor 11 detects the temperature of the battery 2 and outputs an electrical signal indicating the detected temperature. The voltage sensor 12 detects the total voltage of the battery 2 and outputs an electrical signal indicating the detected total voltage. The potential sensor 13 detects the positive electrode potential of the battery 2 and outputs an electrical signal indicating the detected positive electrode potential.

[0012] The battery control device 1 having such a configuration executes the battery control process described below to appropriately determine the degradation state of the battery 2 and suppress degradation of the battery 2. Hereinafter, with reference to Fig. 2, the operation of the battery control device 1 when executing the battery control process according to one embodiment of the present invention will be described.

[0013] [Battery control processing] 2 is a flowchart showing the flow of a battery control process according to one embodiment of the present invention. The flowchart shown in FIG. 2 starts when the battery control device 1 is started, and the battery control process proceeds to step S1.

[0014] In the process of step S1, the battery control device 1 determines whether or not the temperature of the battery 2 is below a predetermined temperature according to the electrical signal output from the temperature sensor 11. If the result of the determination is that the temperature of the battery 2 is below the predetermined temperature (step S1: Yes), the battery control device 1 advances the battery control process to the process of step S2. On the other hand, if the temperature of the battery 2 is not below the predetermined temperature (step S1: No), the battery control device 1 executes the process of step S1 again after a predetermined time has elapsed.

[0015] In the process of step S2, the battery control device 1 determines whether or not the total voltage of the battery 2 is less than a predetermined voltage according to the electrical signal output from the voltage sensor 12. If the result of the determination is that the total voltage of the battery 2 is less than the predetermined voltage (step S2: Yes), the battery control device 1 advances the battery control process to the process of step S3. On the other hand, if the total voltage of the battery 2 is not less than the predetermined voltage (step S2: No), the battery control device 1 advances the battery control process to the process of step S4.

[0016] In the process of step S3, the battery control device 1 charges the battery 2 until the total voltage of the battery 2 reaches a predetermined voltage based on the electrical signal output from the voltage sensor 12. This completes the process of step S3, and the battery control process ends.

[0017] In the process of step S4, the battery control device 1 determines whether or not the positive electrode potential of the battery 2 is less than a predetermined potential according to the electrical signal output from the potential sensor 13. If the result of the determination is that the positive electrode potential of the battery 2 is less than the predetermined potential (step S4: Yes), the battery control device 1 advances the battery control process to the process of step S5. On the other hand, if the positive electrode potential of the battery 2 is not less than the predetermined potential (step S4: No), the battery control device 1 returns the battery control process to the process of step S1.

[0018] In the process of step S5, the battery control device 1 charges the battery 2 until the positive electrode potential of the battery 2 reaches a predetermined potential based on the electrical signal output from the potential sensor 13. This completes the process of step S5, and the series of battery control processes ends.

[0019] As is clear from the above description, in the battery control process according to one embodiment of the present invention, the battery control device 1 charges the battery 2 until the total voltage of the battery 2 reaches the predetermined voltage when the temperature of the battery 2 is below a predetermined temperature and the total voltage of the battery 2 is below a predetermined voltage, and charges the battery 2 until the positive electrode potential of the battery 2 reaches the predetermined potential when the temperature of the battery 2 is below the predetermined temperature and the total voltage of the battery 2 is equal to or greater than a predetermined value and the positive electrode potential of the battery 2 is below a predetermined potential. This makes it possible to appropriately determine the degradation state of the battery 2 and suppress degradation of the battery 2.

[0020] Although the present invention has been described above as an embodiment, the present invention is not limited to the description and drawings that form part of the disclosure of the present invention. In other words, other embodiments, examples, and operational techniques that can be made by those skilled in the art based on the present invention are all included in the scope of the present invention. [Explanation of symbols]

[0021] 1 Battery control device 2 Battery 11 Temperature Sensor 12 Voltage Sensor 13 Potential sensor

Claims

[Claim 1] A battery control device that controls charging and discharging operations of a battery configured by nickel-metal hydride batteries, The battery is charged until the total battery voltage reaches the predetermined voltage when the battery temperature is below a predetermined temperature and the total battery voltage is below a predetermined voltage, and is charged until the positive electrode potential of the battery reaches the predetermined potential when the battery temperature is below the predetermined temperature, the total battery voltage is equal to or greater than a predetermined value, and the positive electrode potential of the battery is below a predetermined potential. A battery control device characterized by:

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