Battery deterioration prevention device

Abstract

The present invention provides a battery deterioration prevention device capable of preventing deterioration of a battery and suppressing a reduction in commodity related to service provision during parking of a vehicle. This battery degradation prevention device is mounted on a vehicle, and is provided with: a storage unit that stores information relating to the priority of a service during a vehicle parking period that operates when the vehicle is parked; an acquisition unit that acquires information about a battery mounted on the vehicle; a calculation unit that calculates, on the basis of the information of the battery, an amount of battery damage to the battery caused by power consumption due to the service during the parking of the vehicle; and a restriction unit that restricts the operation of the service during the parking of the vehicle on the basis of the priority-related information and the amount of battery damage.

Description

Technical Field

[0001] This invention relates to a device for preventing the degradation of batteries mounted on vehicles. Background Technology

[0002] Patent document 1 discloses a vehicle control device that, with the aim of preventing battery deterioration, limits the service during vehicle parking based on the state of the battery.

[0003] Patent Document 1: Japanese Patent Application No. 2024-019631 Summary of the Invention Patent Document 1 does not disclose a method for determining the service during the restricted vehicle parking period. Therefore, the technology described in Patent Document 1 has the following problem: at the cost of preventing battery degradation, the service desired by the vehicle user during the vehicle parking period is restricted, resulting in a decrease in marketability.

[0004] The present invention was made in view of the above-mentioned problems, and its object is to provide a battery degradation prevention device that can prevent battery degradation while suppressing the decline in the commodity quality related to service provision during vehicle parking.

[0005] To address the aforementioned issues, one aspect of the present invention is a battery degradation prevention device mounted on a vehicle, comprising: a storage unit that stores information related to the priority of services operated during vehicle parking; an acquisition unit that acquires information about the battery mounted on the vehicle; a calculation unit that calculates, based on the battery information, the amount of battery damage caused by power consumption resulting from services during vehicle parking; and a limiting unit that limits the operation of services during vehicle parking based on the priority-related information and the amount of battery damage.

[0006] Invention Effects According to the battery degradation prevention device of the present invention, in the case of a large amount of battery damage, the operation of services during vehicle parking is restricted based on priority, thereby preventing battery degradation and suppressing the decline in the quality of services provided during vehicle parking. Attached Figure Description

[0007] Figure 1 This is a functional block diagram of a battery degradation prevention device and its peripheral parts according to an embodiment of the present invention.

[0008] Figure 2 This is a flowchart of the service action control process executed by the battery degradation prevention device during vehicle parking.

[0009] Figure 3This is an example of setting service priorities during the period a vehicle is parked.

[0010] Figure 4 This is an example of a damage threshold set based on the frequency of service during vehicle parking. Detailed Implementation

[0011] The battery degradation prevention device of the present invention sets the priority of services during vehicle parking based on the frequency of use by vehicle users, and determines the restricted services during vehicle parking based on the amount of battery damage and priority order. Thus, it is possible to both prevent battery degradation caused by services during vehicle parking and ensure the commercial viability related to the provision of services during vehicle parking.

[0012] Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[0013] <Implementation Method> [constitute] Figure 1 This is a functional block diagram of a battery degradation prevention device 150 and its peripheral parts according to an embodiment of the present invention. Figure 1 The functional blocks illustrated include battery 110, battery sensor 120, external tool 130, vehicle parking service 140, and battery degradation prevention device 150.

[0014] The battery 110, battery sensor 120, vehicle parking service 140, and battery degradation prevention device 150 are, for example, mounted on vehicles such as hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (PHEVs), and electric vehicles (BEVs).

[0015] The battery 110 is configured as a rechargeable secondary battery, such as a lithium-ion battery. This battery 110 is a so-called auxiliary battery, which is used to supply power to the service 140 during vehicle parking when the vehicle is parked.

[0016] Battery sensor 120 is a detection device (voltage sensor, current sensor, temperature sensor, etc.) used to detect physical quantities (voltage, current, temperature, etc.) of battery 110 as a state of battery 110. The state information of battery 110 detected by battery sensor 120 is output to battery degradation prevention device 150.

[0017] External tool 130 is an external device (e.g., C-BEST) that can connect to the vehicle. By connecting to the vehicle, external tool 130 can provide the battery degradation prevention device 150 with information other than the state of the battery 110. Examples of information other than the state of the battery 110 include battery size information related to the capacity of the battery 110, battery replacement detection information indicating whether the battery 110 has been replaced with a new one, and lifespan target information indicating the target lifespan of the battery 110.

[0018] The service 140 during vehicle parking refers to a device or apparatus that consumes power from the battery 110 to provide a specified service while the vehicle is parked. This service 140 during vehicle parking includes various services (A, B, C, etc.) such as those related to vehicle safety and peace of mind or those related to improving the vehicle's usability. As an example of such a service, a dashcam or similar device can be shown that begins recording images of the vehicle's surroundings when an event is detected while the vehicle is parked, thereby consuming power from the battery 110.

[0019] The battery degradation prevention device 150 is configured to perform a process for preventing the degradation of the battery 110. The battery degradation prevention device 150 includes an acquisition unit 151, a storage unit 152, a calculation unit 153, and a restriction unit 154.

[0020] The acquisition unit 151 can acquire battery information (the state of battery 110) from the battery sensor 120. Furthermore, the acquisition unit 151 can acquire battery information (information other than the state of battery 110) from the external tool 130. Additionally, the acquisition unit 151 can acquire vehicle information from a designated ECU (not shown) installed in the vehicle. This vehicle information includes the state of the ignition switch (IG on / IG off), the supply status of the +B power supply (IGB on / IGB off), and the communication status of the Local Interconnect Network (LIN), which serves as the in-vehicle network (LIN on / LIN off), etc.

[0021] Storage unit 152 stores information related to service 140 during vehicle parking. More specifically, storage unit 152 stores information related to the priority of each service included in service 140 during vehicle parking. An example of the information stored in storage unit 152 is shown below. Figure 3 and Figure 4 .like Figure 3As shown, each service is assigned a priority, with the priority depending on the service category. For example, services related to vehicle safety and security (e.g., in-vehicle monitoring services) should not be restricted and therefore have a high priority. Conversely, services related to the product features of a vehicle (e.g., vehicle fragrance services) can be restricted and therefore have a lower priority compared to safety and security-related services. Furthermore, for multiple product-related services for the same vehicle, the priority is further dynamically determined based on the frequency with which the vehicle's users utilize (operate) the service. Figure 4 The example shown illustrates how service priority is determined based on operating frequency. Figure 4 In this context, for each service, a damage threshold is further set based on the operating frequency to determine whether it should be considered as a restricted item.

[0022] The calculation unit 153 calculates the amount of damage to the battery 110 caused by the power consumption resulting from the service 140 during vehicle parking (hereinafter referred to as "battery damage amount"). The calculation of the battery damage amount performed by the calculation unit 153 will be described later.

[0023] The restriction unit 154, based on priority-related information stored in the storage unit 152 and battery damage calculated by the calculation unit 153, imposes necessary restrictions on the operation of each service included in the service 140 during vehicle parking. Regarding whether a service is a restricted service, for example, it considers whether the battery damage amount corresponds to a damage amount threshold (…). Figure 4 The conditions are determined by ( ).

[0024] Furthermore, some or all of the functions of the battery degradation prevention device 150 are typically configured as an electronic control unit (ECU) including a processor, a memory, and an input / output interface. The ECU reads and executes the program stored in the memory by the processor to realize some or all of the functions of the acquisition unit 151, storage unit 152, calculation unit 153, and restriction unit 154.

[0025] [control] Next, refer to Figure 2 The control performed by the battery degradation prevention device 150 according to one embodiment of the present invention will be described. Figure 2 This is a flowchart illustrating the processing sequence of service operation control during vehicle parking, performed by each component of the battery degradation prevention device 150. Figure 2 The example shown is the control of service actions during vehicle parking, for instance, starting when the vehicle becomes parked.

[0026] (Step S201) The acquisition unit 151 of the battery degradation prevention device 150 acquires battery information (information other than the state of the battery 110) from the external tool 130. The information acquired by the acquisition unit 151, other than the state of the battery 110, includes "battery size information", "battery replacement detection information", and "lifespan target information". If the acquisition unit 151 acquires information other than the state of the battery 110, the process proceeds to step S202.

[0027] (Step S202) The acquisition unit 151 of the battery degradation prevention device 150 acquires information related to the discharge of the battery 110 based on battery information (the state of the battery 110) acquired from the battery sensor 120 and vehicle state acquired from a specified ECU. The information related to the discharge of the battery 110 acquired by the acquisition unit 151 includes "discharge amount when the current IG is off and the LIN is on" and "cumulative discharge value when the IG is off and the IGB is on". The "discharge amount when the current IG is off and the LIN is on" and "cumulative discharge value when the IG is off and the IGB is on" can be calculated using known methods. If the acquisition unit 151 acquires information related to the discharge of the battery 110, the process proceeds to step S203.

[0028] (Step S203) The calculation unit 153 of the battery degradation prevention device 150 calculates the service discharge amount during the current vehicle parking period. This service discharge amount during vehicle parking is obtained by subtracting the "discharge amount when IG is off and LIN is on" from the "discharge amount when IG is off and IGB is on" obtained by the acquisition unit 151 in step S202 above. If the service discharge amount during vehicle parking is calculated by the calculation unit 153, the process proceeds to step S204.

[0029] (Step S204) The calculation unit 153 of the battery degradation prevention device 150 determines whether the battery 110 has been replaced based on the "battery replacement detection information" acquired by the acquisition unit 151 in step S201. If the calculation unit 153 determines that the battery 110 has been replaced (step S204, "Yes"), the process proceeds to step S205. On the other hand, if the calculation unit 153 determines that the battery 110 has not been replaced (step S204, "No"), the process proceeds to step S206.

[0030] (Step S205) The calculation unit 153 of the battery degradation prevention device 150 clears the amount of battery damage to the battery 110. That is, the calculation unit 153 resets the amount of battery damage accumulated in the previous process to zero. If the amount of battery damage is cleared by the calculation unit 153, the process proceeds to step S206.

[0031] (Step S206) The calculation unit 153 of the battery degradation prevention device 150 calculates the amount of battery damage to the battery 110. That is, the calculation unit 153 calculates the amount of damage to the battery 110 caused by the service discharge during the vehicle's parking period, based on the service discharge during the vehicle's parking period calculated in step S203 above. The amount of battery damage BD is calculated using the service discharge during the vehicle's parking period PDC, coefficients a, b, and c, and is obtained by the following formula.

[0032] BD = a × PDC² - b × PDC + c Coefficients a and b are preset values ​​based on the type of vehicle (e.g., the amount of power consumption due to differences in the installed equipment). Therefore, in general-class vehicles and high-class vehicles with more equipment, coefficients a (e.g., 0.0005 and 0.0004) and / or coefficients b (e.g., 1×10⁻⁴ and 9×10⁻⁵) may sometimes differ. Coefficient c is a preset value based on battery size information or lifespan target information. Furthermore, the calculated battery damage amount accumulates until it is cleared in step S205. If the calculation unit 153 calculates the current battery damage amount, the process proceeds to step S207.

[0033] (Step S207) The calculation unit 153 of the battery degradation prevention device 150 sorts the information of the services 140 stored in the storage unit 152 during vehicle parking according to the service's operating frequency from high to low. That is, the calculation unit 153 updates (reorders) the priority order of each service based on the newly accumulated operating frequency from the last processing to the current processing. Figure 4 Additionally, the damage threshold conditions can be changed based on the priority update. If the calculation unit 153 sorts the information of the service 140 during vehicle parking according to the service's operating frequency from high to low, the process proceeds to step S208.

[0034] (Step S208) The calculation unit 153 of the battery degradation prevention device 150 determines whether the cumulative amount of battery damage to the battery 110 calculated in step S206 above is above a predetermined value. This determination is used to determine whether to restrict the operation of the service 140 during vehicle parking. Therefore, this predetermined value is, in principle, the minimum damage threshold in the information of the service 140 during vehicle parking. If the calculation unit 153 determines that the amount of battery damage is above the predetermined value (step S208, "Yes"), the process proceeds to step S210. On the other hand, if the calculation unit 153 determines that the amount of battery damage is below the predetermined value (step S208, "No"), the process proceeds to step S209.

[0035] (Step S209) The restriction unit 154 of the battery degradation prevention device 150 determines whether the operation of the service 140 during vehicle parking is restricted. Based on this determination, the functional restriction level of the service 140 during vehicle parking is set to "no operation restriction". If the restriction unit 154 determines that the service 140 during vehicle parking is "no operation restriction", then the service operation control during vehicle parking ends.

[0036] (Step S210) The limiting unit 154 of the battery degradation prevention device 150 determines whether the operation of the service 140 during vehicle parking should be restricted. Based on this determination, the functional restriction level of the service 140 during vehicle parking is set to "restricted operation". When the functional restriction level is restricted operation, the operation is restricted for services with a damage threshold that satisfies the battery damage amount determined by the calculation unit 153 in step S208 above. If the limiting unit 154 determines that the service 140 during vehicle parking is a "restricted operation", then the service operation control during vehicle parking ends.

[0037] <Function / Effect> As described above, the battery degradation prevention device 150 according to an embodiment of the present invention calculates the amount of battery damage to the battery 110 caused by power consumption caused by the service 140 during vehicle parking based on information of the battery 110, and restricts the operation of the service 140 during vehicle parking based on information related to the priority of the service 140 during vehicle parking that operates when the vehicle is parked and the amount of battery damage.

[0038] This control allows for the prioritization of services with low demand (low priority) from the vehicle's users in the event of significant damage to the battery 110. This prevents battery 110 degradation while suppressing the decline in the commodity value of services provided during vehicle parking.

[0039] The above describes one embodiment of the present invention. However, the present invention can be understood not only as a battery degradation prevention device, but also as a method executed by the battery degradation prevention device, a program of the method, a computer-readable non-transitory storage medium storing the program, and a vehicle equipped with a battery degradation prevention device.

[0040] The battery degradation prevention device of the present invention can be used in vehicles that can prevent the degradation of vehicle batteries while suppressing the decline in the quality of goods related to service provision during vehicle parking.

[0041] Symbol Explanation 110-Battery, 120-Battery sensor, 130-External tool, 140-Service during vehicle parking, 150-Battery degradation prevention device, 151-Acquisition unit, 152-Storage unit, 153-Computing unit, 154-Limiting unit.

Claims

1. A battery degradation prevention device, which is a battery degradation prevention device mounted on a vehicle, characterized in that, have: The storage unit stores information related to the priority of services performed during vehicle parking, which is activated when the vehicle is parked. The acquisition unit acquires information about the battery mounted on the vehicle; The computing unit calculates, based on information about the battery, the amount of battery damage caused by power consumption resulting from services during vehicle parking; and The restriction unit, based on information related to the priority and the amount of battery damage, restricts the operation of services while the vehicle is parked.

2. The battery degradation prevention device according to claim 1, characterized in that, The priority is set based on the frequency of service provided by the vehicle's users during the vehicle's parking period.

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