Electronic energy storage manager for controlling the energy input and output of an energy storage device.

Abstract

Electronic energy storage manager for controlling the energy input and output of an energy storage device in a motor vehicle that is at least partially powered by the energy of the energy storage device, wherein the energy input and output are carried out depending on a predetermined control operating strategy with a predetermined maximum permissible charging stroke and / or a predetermined maximum permissible energy storage load, wherein the energy storage manager provides a power mode with a power operating strategy that deviates from the control operating strategy and can be activated on demand, and wherein, when the power mode is activated, a larger charging stroke is permitted during energy input and output compared to the maximum permissible charging stroke in the control operating strategy, characterized in thatthat the maximum permissible charging stroke and / or the maximum permissible energy storage load in performance mode are specified depending on a range desired by the driver, which should be achievable with the energy provided by the energy storage system.

Description

[0001] The invention relates to an electronic energy storage manager for controlling the energy input and output of an energy storage device according to the preamble of claim 1.

[0002] Currently, electric vehicles powered by energy from a storage system are offered with a fixed range. This fixed range is determined by the design (size) of the storage system and the charging / discharging strategy, which is fundamentally designed to maximize the storage system's lifespan while considering the power required for propulsion. Therefore, a change in the range or the available energy for propulsion can only be achieved by providing a larger storage capacity. Due to the need to maintain the longest possible lifespan of the storage system, the charging / discharging strategy remains unaffected.

[0003] From DE 196 17 558 B4, an energy manager for an energy storage device in a motor vehicle is known, whereby the available energy of the energy storage device can be distributed according to predefined priorities. For this purpose, the driver can assign a priority to the various predefined modes (e.g., maximum range, minimum fuel consumption, or maximum comfort). The energy distribution then takes place according to these predefined priorities. However, the charging and discharging strategy of the energy storage device remains the same; that is, the total available energy cannot be increased.

[0004] Energy managers for an energy storage system in a motor vehicle are also known from DE 601 30 484 T2 and DE 10 2008 040 400 A1.

[0005] The object of the invention is to provide an improved energy storage manager with regard to the provision of total energy.

[0006] This problem is solved by an electronic energy storage device according to claim 1. Advantageous further developments result from the dependent claims.

[0007] The system is based on a known energy storage manager for controlling the energy input and output of an energy storage device in a motor vehicle that is at least partially powered by the energy from the storage device. The charging and discharging strategy for energy input and output is determined according to a predefined operating strategy with a predefined maximum permissible charging range and / or a predefined maximum permissible energy storage load. The operating strategy is designed to maximize the lifespan of the energy storage device.

[0008] The basic idea of ​​the invention is to modify the energy storage manager in such a way that the operating strategy can be changed with regard to a modification or an increase in the total amount of energy provided, and thus to achieve a greater range. Accordingly, the invention is characterized by the fact that the energy storage manager provides a power mode with a power operating strategy that deviates from the standard operating strategy and can be activated on demand.

[0009] This performance mode is designed such that, when activated, a larger charging range is permitted for both energy input and output compared to the maximum permissible charging range under the standard operating strategy. The charging range is defined by a lower discharge limit and an upper charge limit. This means that when the energy storage system reaches the lower discharge limit, no further discharge by releasing energy is possible, and when the upper charge limit is reached, no further charging, e.g., through recuperation, is possible or permitted. If the system switches to performance mode upon request, the charging range can be increased by either lowering the lower discharge limit and / or raising the upper charge limit.

[0010] Alternatively or additionally, this power mode can also be designed in such a way that, when the power mode is activated, a higher energy storage load is permitted during energy input and output compared to the maximum permissible energy storage load within the framework of the regular operating strategy.

[0011] Since operating the energy storage system in performance mode may shorten its lifespan, it is advantageous to activate performance mode only using a suitable device, for example, via a diagnostic port in workshops or other service centers. This allows the driver or owner to be reminded that activating performance mode may result in a shorter lifespan for the energy storage system, necessitating its replacement sooner. Furthermore, this prevents the system from constantly switching between standard and performance modes.

[0012] The maximum permissible charging stroke and / or the maximum permissible energy storage load in performance mode can be preset depending on the range desired by the driver or vehicle owner, which is to be achievable with the energy supplied by the energy storage system, and / or the power output drawn from the energy storage system by the driver. The greater the desired range, the greater the maximum possible or permissible charging stroke can be set.

[0013] The invention thus offers the driver or owner of the vehicle the possibility of influencing the range or power consumption themselves. If they desire an increased range, however, they must also accept a potentially shorter lifespan of the energy carrier.

Claims

[1] Electronic energy storage manager for controlling the energy input and output of an energy storage device in a motor vehicle that is at least partially powered by the energy of the energy storage device, wherein the energy input and output are carried out depending on a predetermined control operating strategy with a predetermined maximum permissible charging stroke and / or a predetermined maximum permissible energy storage load, wherein the energy storage manager includes a power mode with a power operating strategy that differs from the control operating strategy and can be activated on demand, and wherein, when the power mode is activated, a larger charging stroke is permitted during energy input and output compared to the maximum permissible charging stroke in the control operating strategy. characterized by, that the maximum permissible charging stroke and / or the maximum permissible energy storage load in performance mode are specified depending on a range desired by the driver, which should be achievable by the energy provided by the energy storage system. [2] Electronic energy storage manager according to claim 1, characterized by , that when the power mode is activated, a higher energy storage load is permitted during energy input and output compared to the maximum permissible energy storage load in the normal operating strategy. [3] Electromixer energy storage manager according to claim 2, characterized by , that the maximum permissible charging stroke and / or the maximum permissible energy storage load in performance mode are specified depending on the power extraction from the energy storage desired by the driver.