Mobile discharge device and method for discharging battery

Abstract

The invention relates to a mobile discharge device (200) for the targeted, regulated discharge of a battery (130) of a unit (100) comprising a battery, in particular of an electric vehicle, a secondary life application or a mobile or stationary energy storage device, such as a PV device, comprising the following components: a connection; -transmission means (230) for transmitting and receiving signals; an evaluation device (220) comprising intelligent evaluation electronics and at least one integrated storage medium, the intelligent evaluation electronics being configured to decrypt and interpret the signal; -an energy supply device (240); an internal energy consumer (250); and-a regulating device (260) for the extracted energy, in particular as an overload protection device.

Description

Technical Field

[0001] The invention relates to a mobile discharging device, a method for targeted discharging of a battery and a battery discharging system according to the preambles of the independent claims. Background Art

[0002] Electric vehicles must be charged regularly. In the event of an accident, transport, repair or scrapping, partially or fully charged traction batteries or drive batteries represent a danger point. In particular, if they have undetected defects, they can cause considerable damage due to heat release, up to a fire. Before the vehicle is rescued after an accident and transported away or repaired, the batteries should be discharged for safety reasons. Likewise, partially or fully charged batteries represent an increased risk for certain transport situations, such as air or sea transport. Here, too, the transportation of discharged batteries significantly minimizes the risk. It is therefore worthwhile to be able to discharge the batteries in a targeted and mobile manner at the necessary site in order to take these situations into account.

[0003] Electric vehicles require an internal power source for the operation of their electric motors, which is implemented as batteries. The batteries can be charged by connection to an external power grid or can be used bidirectionally to feed current into the grid.

[0004] Methods are known from the prior art, for example, to use traction batteries bidirectionally as energy storage for photovoltaic (PV) systems and to feed them back into the household electrical system. In this case, the current previously fed via a charging cable from the household's own stationary PV system is fed back from the traction battery into the household electrical system when required (e.g. at night).

[0005] DE 102016214484 A1 discloses a method for preparing a battery of a motor vehicle comprising a plurality of lithium-ion battery cells for transport, in which a predetermined charge state of the battery is set in which the installed battery delivers electrical energy to at least one electrically connected energy sink of the motor vehicle (e.g. a load of the onboard electrical system), without any external devices being connected to the battery.

[0006] DE 10 20 20 00 4 733 A1 describes a method for operating a vehicle-based energy storage system coupled at least temporarily to an external grid, the energy storage system comprising at least one vehicle having a battery and a charging station for charging and / or discharging the battery of the vehicle via the external grid.

[0007] DE 102018114239 A1 discloses a vehicle having a battery and a coil device bidirectionally connected to the battery for charging the battery in a first operating state and discharging the battery in a second operating state. A corresponding vehicle-station-device can be integrated in a suitable section of a road or parking lot. Summary of the invention

[0008] In contrast, the invention provides a mobile discharging device, a method for targeted discharging of a battery using the mobile discharging device, and a battery discharging system having the characterizing features of the independent claims.

[0009] According to the invention, a mobile discharge device is provided for the targeted and controlled discharge of a battery of a unit comprising a battery. This unit is, for example, an electric vehicle, a secondary life application, a battery compartment comprising a plurality of batteries or battery cells, or a mobile or fixed energy storage device, such as a PV system. The mobile discharge device comprises the following components: a connector; a transmission device for sending and receiving signals; an evaluation device comprising intelligent evaluation electronics and at least one integrated storage medium, wherein the integrated evaluation electronics is configured for decrypting and interpreting the signals; an energy supply device; an internal energy consumer; and a control device for the extracted energy, in particular as an overload protection device.

[0010] In the context of the present invention, all types of motor vehicles that are operated electrically or at least partially electrically, so-called hybrid vehicles, are referred to as electric vehicles. Thus, in particular, cars, trucks, buses, water vehicles or special vehicles, such as forklifts, that are operated electrically or semi-electrically are referred to as electric vehicles. As an alternative, electric or semi-electrically operated aviation applications are also conceivable.

[0011] The evaluation device comprises the intelligent evaluation electronics having at least one integrated storage medium and is able to access specific software or data when predetermined conditions occur, such as the exchange of specific protocols, the reception and transmission of specific signals or specific data, in particular digital keys or digital signatures.

[0012] In at least one storage medium, for example, setpoint values ​​and / or standard values ​​of various parameters, such as the state of charge, the state of discharge, voltage values ​​and / or temperature values ​​of the battery to be discharged, are stored. In addition, for example, optimal discharge curves for different application cases, such as for rapid discharge, can be stored. Routines can also be stored that instruct a control device of a cell including a battery to provide current bidirectionally.

[0013] The signal to be detected is, for example, a voltage value, in particular of a high-voltage line, a change in a voltage value of a voltage-carrying component or a data set of a control unit, for example a cell including a battery.

[0014] The energy supply of the discharge device is realized, for example, as an internal battery of the discharge device, which is supplied with energy, for example, by a battery comprising cells of the battery to be discharged. Alternatively, the energy supply of the discharge device is realized in the form of a grid connection to an external grid.

[0015] The internal energy consumer of the discharge device acts as a power eliminator. In particular, the internal energy consumer conducts the current transmitted from the battery to be discharged to the internal energy consumer, for example, further to other energy consumers, in particular to an external heating element or in the form of feedback to an external power grid. If no other energy consumers are present, in particular at the accident site, for example, the heated cooling water of the cooling device of the discharge device can be discharged on site to the road or diverted in some way.

[0016] In the context of the present invention, a discharge device is a movable device. As an alternative, the discharge device can also be made fixed, for example, detachably mounted on a wall of a repair shop.

[0017] The discharge device comprises, for example, a connection cable for connecting the connections of the mobile discharge device to the connections of the unit comprising the battery to be discharged.

[0018] In this case, the connecting cable can be fixedly connected to the discharge device or can be made in such a way that it can be inserted into the discharge device. As a pluggable embodiment, it is, for example, a standard charging cable for electric vehicles. In addition, the connecting cable is designed, for example, in a form that allows connection to other voltage-carrying components, such as, for example, high-voltage components of mobile and fixed energy storage devices of electric vehicles or PV systems. The connecting cable is used, for example, when the charging socket is no longer usable due to damage or when the unit including the battery, in particular the electric vehicle, is not designed for bidirectional current or when it is a single battery to be discharged, for example in a battery compartment with multiple batteries.

[0019] In order to move the electric vehicle or operate a stationary secondary life application, for example, the discharge device must first be removed. In order not to forget the discharge device and not to damage the electric vehicle or the stationary secondary life application, the mobile discharge device and, for example, the connecting cables, for example, it is not possible to drive or operate with the discharge device plugged in.

[0020] In the case of the mobile discharge device according to the invention, it is advantageous that the battery of a unit comprising a battery can be discharged on site in a targeted and controlled manner by means of the mobile discharge device, regardless of the location of this location. If the unit comprising a battery is, for example, an electric vehicle, the battery can be discharged or partially discharged directly on site when the vehicle is damaged, for example due to an accident, must be rescued and is to be transported away. It is also possible to discharge or partially discharge the traction battery in a repair shop by means of the discharge device during a stop at a repair shop, for example when the traction battery is about to be replaced. In another aspect for transporting the battery, the battery is prepared on site by means of the discharge device for a transport situation, for example air transport or ship transport, in which safe transport is only possible when the battery is already discharged or partially discharged. In this way, for example, the risk of thermal discharge of the battery and the risk of fire that may ensue can be minimized or eliminated, especially in the case of undetected defects, so that safe battery operation for people and the environment can be achieved.

[0021] Further advantageous embodiments of the invention are the subject matter of the dependent claims.

[0022] It is therefore advantageous if the mobile discharge device comprises an internal cooling device for cooling by means of air and / or a liquid cooling medium, in particular water. A cooling device is preferred because heat is generated when the current is transmitted from the battery to the discharge device. As a result, the battery can be discharged significantly faster.

[0023] In one embodiment, the coolant circulates, for example, in a closed circuit inside the discharge device. Here, the coolant can be supplied from the outside to a coolant connection of the circuit or stored in the discharge device.

[0024] In an alternative embodiment, the cooling circuit is at least partially external, i.e., outside the discharge device and can be realized in an open or closed manner. The cooling medium can be connected to the outside, for example, via a cooling device connection. The cooling device connection is realized, for example, as a Storz coupling, as is common in fire brigades, so that, for example, water from a fire truck or water from a water hydrant is used as the cooling medium. As an alternative, the cooling device connection is realized as a common household water connection, so that, for example, a tap or a garden hose can be connected.

[0025] If the discharge device is used, for example, in a maintenance point or other building, the cooling device can be connected, for example, to the circuit of the workshop air conditioning system or to the heating circuit. Here, the heat generated can also be used to heat hot water and / or supply the heating circuit.

[0026] As an alternative or supplementary solution, the cooling medium is, for example, air, which is moved in particular by means of a fan in the cooling device. Here, for example, energy is fed to the fan by a battery to be discharged. In addition, as an alternative, the cooling medium is oil.

[0027] Furthermore, it is advantageous if the cooling device has a temperature-controlled flow control mechanism. By means of the flow control mechanism, for example, the inflow of the cooling medium and / or the speed of the cooling medium circulation can be controlled and / or regulated. The temperature-controlled flow control mechanism and the evaluation device of the discharge device communicate with each other, for example, in particular when the discharge speed of the battery needs to be adjusted, for example due to excessive heating of the mobile discharge device.

[0028] According to a further advantageous embodiment, the mobile discharging device has a display device, by means of which the discharge state and / or charge state and / or the battery voltage and / or the temperature and / or the cooling water temperature and / or a signal lamp of the battery to be discharged can be displayed.

[0029] If the display device comprises a signal lamp, the signal lamp, for example, displays green light when the battery of the unit comprising the battery is completely discharged or discharged to a predetermined and / or set discharge state, charge state and / or voltage value. As long as such a state or value has not been reached, the signal lamp, for example, lights up red. As an alternative or in addition, the display device is implemented in the form of a display that displays corresponding values ​​and information.

[0030] With the aid of such a display device, it is possible to display to the user of the discharge device, for example, whether the discharge process of the battery has started, is still continuing, is paused, or has ended. In addition, for example, the remaining duration of the discharge of the battery and / or the current discharge state, charge state, voltage value, and / or temperature value of the battery and / or the discharge device are displayed. Therefore, the user can estimate and plan the duration of the battery discharge and manually intervene if necessary to stop the discharge in advance or to make the discharge continue or pause for a longer time. In addition, for example, when the discharge of the battery does not proceed as planned or a value does not meet the regulations, the user sees it, so that he can stop, pause, adjust, and / or restart the discharge of the battery.

[0031] Furthermore, it is advantageous if the evaluation device of the mobile discharge device has means for transmitting information about the battery and / or the unit comprising the battery. Such information is, for example, the discharge state, such as, for example, the voltage value, the discharge duration or the remaining discharge time until, for example, a set nominal value is reached. Furthermore, such information can be the position, in particular the GPS (Global Positioning System) position and / or the chassis number in the case where the unit comprising the battery is an electric vehicle.

[0032] The device for enabling the transmission of information about a unit comprising a battery can, for example, include a program code which controls a controller in such a way that the controller sends a signal to a transmitting unit, in particular an antenna and its control unit, whereupon the controller transmits information about a unit comprising a battery, in particular an electric vehicle, such as vehicle information.

[0033] It is advantageous here that in the event of an accident with an electric vehicle, when discharging the battery with the aid of a mobile discharging device, the discharge state and the remaining time until the target value is reached, the temperature and other information about the battery can be displayed to the on-duty personnel, for example on a mobile terminal such as a mobile phone. The on-duty personnel can thus, for example, quickly check and, if necessary, adjust the target value specification.

[0034] The invention also relates to a method for the targeted, controlled on-site discharge of a battery of a unit comprising a battery using a mobile discharge device. The unit comprising a battery is, for example, an electric vehicle, a secondary life application or a mobile or stationary energy storage device such as, for example, a photovoltaic system. The method comprises the following steps:

[0035] a) Connecting a connection of the mobile discharge device to a connection point of the unit comprising the battery to be discharged, in particular via a connecting cable.

[0036] b) Recognizing the connection between the unit comprising the battery and the mobile discharging device by detecting the signal at least with the aid of intelligent evaluation electronics of the evaluation device of the mobile discharging device.

[0037] c) Discharging the battery of the unit, wherein energy is drawn from the battery and supplied to a mobile discharging device.

[0038] Such a method is distinguished by the fact that the battery of a cell comprising a battery can be discharged or partially discharged on site in a targeted and controlled manner by means of the method according to the invention with the aid of a mobile discharge device, regardless of where the location is. The advantages already described above with respect to the discharge device also apply.

[0039] In an advantageous embodiment of the method according to the invention, before, during or after step b) or step c), data is exchanged with the unit comprising the battery in order to stimulate a bidirectional current output from the battery or to simulate an output to the domestic power grid by means of stored standard routines.

[0040] In a preferred advantageous embodiment of the method according to the invention, before, during or after step a) or step b), a coolant for a cooling device of the discharge device is additionally connected via a cooling device connection.

[0041] The advantages already described above with regard to the mobile discharge device with cooling device apply here.

[0042] According to a first advantageous embodiment, the connection point of the unit including the battery is a charging socket into which a connecting cable with a plug can be plugged in order to connect the unit to the discharge device according to the invention. Such a connection can be realized, for example, by a standardized type 2 plug-and-socket pair. The method according to the invention is started, for example, by manual plugging.

[0043] Advantageously, if the unit comprising the battery is an electric vehicle, for example the charging cable of the electric vehicle can be used to connect the electric vehicle and the discharge device which is already in the electric vehicle. Alternatively, other connecting cables are used.

[0044] In a further advantageous embodiment of the method according to the invention, in step b) of the method, the connection between the unit comprising a battery and the mobile discharging device is likewise detected by the control device of the unit comprising a battery.

[0045] It is advantageous here if the unit comprising the battery pack and the electric vehicle can communicate with one another in this way.

[0046] According to an advantageous development, step b) is followed by step b'), in which communication with a control device of the unit comprising the battery is stimulated via the identified connection and the discharge device, in particular an evaluation device of the discharge device with intelligent evaluation electronics, specifies relative to the control device of the unit comprising the battery that energy is to be drawn from the battery, in particular by simulation or by stimulation of a routine within the vehicle, that current is to be fed back into the power grid, for example into a household power grid.

[0047] The evaluation device of the discharge device evaluates the signal of the control device or the onboard computer of the unit including the battery and specifies that energy should be drawn from the battery. The evaluation device of the discharge device then starts the discharge of the battery, for example.

[0048] Furthermore, it is advantageous if step b' is followed by a step b") in which the communication between the control device of the unit comprising the battery and the evaluation device of the discharge device is terminated.

[0049] In a second advantageous embodiment, the connection point of the unit including the battery is a voltage-carrying component. This can be, for example, a high-voltage component of an electric vehicle. In the case of an electric vehicle, the connection to the voltage-carrying component is carried out, for example, via suitable contact options or other contact points present on the vehicle side.

[0050] In this case, it is advantageous if the battery can also be discharged if, for example, the charging socket of the electric vehicle is no longer usable due to damage or if the unit comprising the battery, in particular the electric vehicle, is not designed for a bidirectional current flow.

[0051] According to another advantageous embodiment, the signal in step b) is a change in the voltage value of the high-voltage line or the voltage value of the battery or a voltage-carrying component of the unit including the battery. Advantageously, the intelligent evaluation electronics of the evaluation device of the discharge device detects the connection to the unit including the battery or other electrically conductive components in this way without requiring communication with the unit including the battery.

[0052] In another advantageous embodiment, it is provided that the intelligent evaluation electronics of the evaluation unit of the discharge device automatically start the discharge of the battery after detecting a connection to the unit comprising the battery. Alternatively, the discharge of the battery starts after release by an operator.

[0053] The advantage of these options is that the battery can be discharged without the battery having a functional communication connection with the battery-containing unit 100. This makes it possible, for example, to discharge an unmounted battery, for example in a warehouse or during transport.

[0054] Thus, it is also possible to discharge the batteries of special vehicles, regardless of whether they are installed in the special vehicle or are located in a charging station or battery warehouse.

[0055] A further advantage is that mobile and stationary energy storage devices can be discharged in the same manner.

[0056] It is also advantageous if status information of the battery and / or of its individual cells, such as, for example, the battery's discharge state and / or charge state and / or voltage value and / or discharge capacity and / or energy output and / or thermal state, in particular the battery's temperature, is transmitted from an evaluation device of the discharge device to a unit comprising the battery and / or to another receiver, for example, to a mobile terminal device of a user, such as a maintenance technician or personnel on duty at the accident site.

[0057] The thermal state of a battery, including a cell of the battery, can be determined in particular directly, for example by means of at least one temperature sensor, or indirectly, for example by means of a voltage value. If the battery becomes overheated due to the discharge process, it can damage itself or the cell including the battery due to the heat generated. In some cases, it is entirely possible for smoldering or open flames to occur. The determination of the thermal state and in particular the temperature of the battery and the transmission of the corresponding state information of the battery can be advantageously used to detect heat release at an early stage and reduce the risk of damage caused by fire by limiting, suspending or stopping the discharge. Therefore, it is of great importance to know the thermal state of the battery, especially for electric vehicles.

[0058] Furthermore, it is advantageous if the state information of the battery and / or the battery cells is transmitted at arbitrarily adjustable intervals during the discharging process.

[0059] This also makes it possible to detect defects that only occur during the discharge process, in particular defects of the battery or its components, in advance. In this way, the battery can be monitored regularly. In this way, the battery can be discharged optimally without having to expect damage.

[0060] In one embodiment, it is advantageous to send information about the unit containing the battery, in particular its GPS position and / or, if the unit containing the battery is an electric vehicle, its chassis number, to a receiver, for example a mobile terminal of a user. The user can be, for example, a service employee or a janitor.

[0061] By transmitting the position and / or the chassis number, the customer or owner or user of the electric vehicle can monitor important vehicle data and, if necessary, change setpoints or make other adjustments to parameters.

[0062] Furthermore, it is advantageous to transmit information about the cells including the battery and information about the state of the battery, such as, for example, the charge state and / or the voltage value and / or the discharge capacity and / or the energy output and / or the thermal state of the battery, in particular the temperature of the battery, via a radio network, in particular a wide area network (WAN) or a GSM mobile radio standard network (GSM). In this way, information about the battery or the cells including the battery can be transmitted in an advantageous manner at any arbitrary location using a connection to a corresponding radio network. As a result, the method can also be coordinated remotely. Not only WAN technology but also GSM technology and GPS positioning technology are standardized and can be easily used by the discharge device.

[0063] Furthermore, the network can extend over a region, such as a city, a specific area, in particular a factory area, a single building, such as a sales office or a measuring field, or over a large region, in particular the world, and over all transport routes by land, water and air. Furthermore, the network can be limited locally and restricted to a local area network (English: Local Area Network, LAN), in particular a wireless local area network (English: Wireless Local Area Network, WLAN).

[0064] In another particularly advantageous embodiment, provision is made for the discharge to be suspended or ended in step c) when a predefined threshold value of a discharge state and / or a charge state and / or a voltage value and / or a temperature value of the discharged battery is reached.

[0065] The corresponding parameters of the battery to be discharged, in particular the discharge state and / or the charge state and / or the voltage value and / or the temperature value, for example, have a rated value, which, for example, forms a threshold value. The intelligent evaluation electronics of the evaluation unit monitor whether the measured value is within a specific measurement range or whether the value is above or below the threshold value and, if necessary, introduce corresponding measures, such as, for example, ending or pausing the discharge process of the battery. The threshold value for the charge state of the battery is, for example, 10%. The discharge process is then stopped in this charge state. In this way, for example, the optimal charge or discharge state of the battery can be achieved, in particular for the subsequent transportation of the battery and / or the unit comprising the battery.

[0066] A third subject of the invention is a battery discharge system comprising a battery in a battery-containing unit and a mobile discharge device. In this case, the battery-containing unit and the mobile discharge device can be connected to one another, in particular via a connecting cable, so that electrical energy can be transmitted in a targeted and controlled manner, in particular on site, from the battery of the battery-containing unit to the discharge device by means of the method according to the invention. The battery-containing unit is in particular an electric vehicle or a secondary life application or a mobile or stationary energy storage device, such as, for example, a PV system.

[0067] A unit comprising a battery, in particular an electric vehicle, advantageously comprises an evaluation electronics or a control unit or an onboard computer which is designed to determine at least one state information of the battery, such as, for example, the battery charge state or, for example, a signal that the battery and the electric vehicle are ready for current feedback. The evaluation electronics of the electric vehicle can be implemented, for example, as part of the onboard software of the onboard computer or onboard control unit of the electric vehicle or as an additional module in the electric vehicle and / or in its battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] Advantageous embodiments of the invention are shown in the drawings and are explained in detail in the following description.

[0069] Figure 1a A schematic diagram of a battery discharge system according to a first embodiment of the present invention is shown, and

[0070] Figure 1b A schematic diagram of a battery discharge system according to a second embodiment of the present invention is shown. DETAILED DESCRIPTION

[0071] exist Figure 1a , a battery discharge system 500 according to the invention is shown according to a first specific embodiment of the invention. The battery discharge system 500 comprises the battery 130, in particular a drive battery or a traction battery, in a unit comprising the battery 130, which is designed here by way of example as an electric vehicle 100. The battery discharge system 500 also comprises a mobile discharge device 200 for discharging the battery 130 in a targeted and controlled manner, which is connected to the electric vehicle 100 via a connecting cable 210, in particular a charging cable.

[0072] For this purpose, the mobile discharge device 200 comprises a connector (not explicitly shown) via which the connecting cable 210 can be connected, for example plugged in. As an alternative, the connecting cable 210 is fixedly connected to the discharge device 200. In addition, the mobile discharge device 200 comprises a transmission device 230 for sending and receiving signals and an evaluation device 220 with intelligent evaluation electronics and at least one integrated storage medium, wherein the intelligent evaluation electronics is set up for decrypting and interpreting the signals. The evaluation device 220 also has, for example, means for transmitting information about the unit 100 including the battery 130. Such information is, for example, a position, in particular a GPS position and / or a chassis number.

[0073] Furthermore, the discharge device 200 comprises an energy supply 240 , an internal energy consumer 250 and a control device 260 for the withdrawn energy, in particular as an overload protection device.

[0074] The discharge device 200 also has an internal cooling device 270. The cooling device 270 can be connected to an external unit 300 containing a cooling medium via a cooling device connection 280. The cooling medium is, for example, water. The unit 300 containing a cooling medium is, for example, a rescue vehicle, a water hydrant or, in particular, a common household water pipe. The cooling device 270 also has a temperature-controlled flow control device 290.

[0075] Furthermore, the mobile discharge device 200 comprises a display device 295, by which the discharge state and / or charge state and / or battery voltage and / or temperature and / or cooling water temperature of the battery to be discharged are displayed. Alternatively or additionally, the display device 295 comprises a signal lamp.

[0076] In addition to the battery 130, the electric vehicle 100 also includes further voltage-carrying components 150, a control unit 120, an onboard computer 140, and a charging socket 110 as a connection point. For example, a connecting cable 210, in particular a charging cable of the electric vehicle 100, can be plugged into the charging socket 110, so that energy from the battery 130 can be transmitted to the mobile discharge device 200 via the connecting cable 210.

[0077] After the connection of the mobile discharge device 200 to the charging socket 110 of the electric vehicle 100 is connected via the connecting cable 210, the connection between the electric vehicle and the discharge device is detected by detecting signals by means of the control device 120 of the electric vehicle 100 and by means of the intelligent evaluation electronics of the evaluation device 220 of the mobile discharge device 200. The detected signal is, for example, a data set of a device, in particular of the control device 120 of the electric vehicle 100.

[0078] The identified connection initiates communication with the control device 120 of the electric vehicle 100 and the intelligent electronics of the evaluation device 220 of the discharge device 200 predetermines with respect to the control device 120 of the electric vehicle 100 that energy should be drawn from the battery 130. To this end, the intelligent evaluation electronics of the evaluation device 220 simulates, for example, for the control device 120 of the electric vehicle 100 that current should be fed back into the grid.

[0079] The communication between control device 120 of electric vehicle 100 and evaluation device 220 of discharge device 200 is then terminated and discharge of battery 130 of electric vehicle 100 is started. Energy is thereby drawn from battery 130 of electric vehicle 100 and supplied to energy consumer 250 of mobile discharge device 200.

[0080] During the discharge process of the battery 130, the discharge device 200 is cooled by the cooling device 270, for example, by means of a cooling medium, for example, water, which is supplied externally via a cooling device connection 280. For example, the inflow of the cooling medium and / or the speed of the cooling medium circulation are controlled and / or regulated by the temperature-controlled flow control device 290. In addition, the temperature-controlled flow control device 290 and the evaluation device 220 of the discharge device communicate with each other, for example, so that the discharge speed of the battery 130 can be adjusted if necessary.

[0081] When a predetermined threshold value of the discharge state and / or charge state of battery 130 to be discharged, for example 10% and / or a predetermined threshold value of a voltage value and / or a temperature value, is reached, the discharge of battery 130 is terminated or suspended.

[0082] Before, during and / or after the discharge process, for example, state information of the battery 130 and / or of the individual battery cells of the battery, such as, for example, the discharge state and / or the charge state and / or the voltage value and / or the discharge capacity and / or the energy output power and / or the thermal state, in particular the temperature of the battery 130, is transmitted from the evaluation device 220 of the discharge device 200 to the electric vehicle 100 and / or to another receiver. This transmission takes place, for example, at arbitrarily adjustable intervals during the discharge process.

[0083] Furthermore, for example, information about the electric vehicle 100 , such as in particular its position and / or its chassis number, is transmitted in particular via a radio network to a receiver such as, for example, a terminal of a service technician at a repair shop or to personnel at the scene of an accident.

[0084] exist Figure 1b FIG. 5 shows a battery discharge system 500 according to the present invention according to a second embodiment of the present invention. Figure 1a The embodiment described differs in that the connection point of the electric vehicle 100 is a voltage-carrying component 150, for example a high-voltage component of the electric vehicle 100. The connecting cable 215 has suitable connection options to the voltage-carrying component of the electric vehicle 100. This is used, for example, when the charging socket 110 of the electric vehicle 100 is no longer usable due to damage or the electric vehicle 100 is not designed for a bidirectional current flow or when it comes to individual batteries in a battery compartment, for example.

[0085] Voltage-carrying components 150 , in particular high-voltage components, are connected to discharge device 200 via suitable connection options of connecting cables 215 , so that energy from battery 130 of electric vehicle 100 can be transferred to mobile discharge device 200 via connecting cables 215 .

[0086] The intelligent evaluation electronics of the evaluation device 220 of the mobile discharge device 200 detects the connection between the electric vehicle 100 and the mobile discharge device 200 by detecting a signal. This signal is, for example, a change in a voltage value, in particular a voltage value of a high-voltage line or a voltage value of a voltage-carrying component. Subsequently, the intelligent evaluation electronics of the evaluation unit 220 of the discharge device 200 automatically or after being triggered by the operator starts the discharge of the battery 130 of the electric vehicle 100. When discharging the battery 130, energy is extracted from the battery and supplied to the energy consumer 250 of the mobile discharge device 200.

[0087] In addition to the distinguishing features described here, Figure 1a The described features also apply to this embodiment.

Claims

1. A mobile discharge device (200) for the targeted, controlled discharge of a battery (130) of a battery-containing unit (100), in particular an electric vehicle or a secondary life application, comprising the following components: - connectors; - a transmitting device (230) for sending and receiving signals; - an evaluation device (220), comprising intelligent evaluation electronics and at least one integrated storage medium, wherein the intelligent evaluation electronics is configured to decrypt and interpret the signal; - Energy supply device (240); - Internal energy dissipators (250), and - A regulating device (260) for the extracted energy, in particular as an overload protection device.

2. The mobile discharge device (200) according to claim 1, wherein the discharge device further comprises an internal cooling device (270) for cooling by means of air and / or a liquid cooling medium, in particular water, and wherein the cooling medium can circulate within the circuit and / or can be connected to the outside via a cooling device connection (280).

3. The mobile discharge device (200) according to claim 2, wherein the cooling device (270) has a temperature-controlled flow regulating mechanism (290).

4. The mobile discharging device (200) according to any one of the preceding claims, wherein the mobile discharging device (200) has a display device (295), by which the discharge state and / or the charge state and / or the battery voltage and / or the temperature and / or the cooling water temperature and / or a signal light of the battery to be discharged can be displayed.

5. The mobile discharge device (200) according to any one of the preceding claims, wherein the evaluation apparatus (220) has means for releasing the transmission of information about the battery and / or a unit (100) comprising the battery.

6. A method for targeted, controlled on-site discharging of a battery (130) of a battery-containing unit (100), in particular an electric vehicle or a secondary life application, using a mobile discharging device (200) according to any one of claims 1 to 5, comprising the following steps: a) Connecting a connection of the mobile discharge device (200) to a connection point (110, 150) of a unit (100) comprising a battery (130) to be discharged, in particular via a connecting cable (210, 215). b) identifying a connection between the unit (100) comprising a battery (130) and the mobile discharging device (200) by detecting a signal, at least with the aid of intelligent evaluation electronics of an evaluation device (220) of the mobile discharging device (200). c) discharging the battery (130) of the unit (100), wherein energy is drawn from the battery (130) and supplied to the mobile discharging device (200).

7. The method according to claim 6, wherein a cooling medium for a cooling device (270) of the discharge device (200) is additionally connected via a cooling device connection (280) before, during or after step a) or step b).

8. The method according to any one of claims 6 or 7, wherein the connection point of the unit (100) comprising the battery (130) is a charging socket (110).

9. The method according to any one of claims 6 to 8, wherein in step b) the connection between the unit (100) comprising a battery (130) and the mobile discharge device (200) is also identified by the control device (120) of the unit (100) comprising a battery (130).

10. The method according to claim 9, wherein the next step b') is performed immediately after step b). b') activating communication with a control device (120) of a unit (100) comprising a battery (130) via the identified connection and The intelligent electronics of the evaluation device (220) of the discharge device (200) predetermines, relative to a control device (120) of a unit (100) comprising a battery (130), that energy is to be drawn from the battery (130) and, in particular, predetermines, by simulating or stimulating routines within the vehicle, that current is to be fed back into the power grid.

11. The method according to claim 10, wherein step b') is performed immediately after step b'). b”) terminating the communication between the control device (120) of the unit (100) comprising the battery and the evaluation device (220) of the discharge device (200).

12. The method according to claim 6, wherein the connection point of the cell (100) comprising the battery (130) is a voltage-conducting component (150).

13. The method according to any one of claims 6, 7 or 12, wherein the signal in step b) is a change in the voltage value of the high-voltage line or of a voltage-conducting component.

14. A method according to any one of claims 6, 7, 12 or 13, wherein in step c) the intelligent evaluation electronics of the evaluation unit (220) of the discharge device (200) starts discharging the battery (130) automatically or after being released by an operator after recognizing a connection to a unit (100) comprising the battery (130).

15. A method according to any one of the preceding claims 6 to 14, wherein status information of the battery (130) and / or individual battery cells of the battery (130), such as, for example, the discharge state and / or charge state and / or voltage value and / or discharge capacity and / or energy output power and / or thermal state of the battery (130), in particular the temperature of the battery (130), is transmitted from the evaluation device (220) of the discharge device (200) to the unit (100) including the battery (130) and / or to other receivers.

16. The method as claimed in claim 15, wherein the state information of the battery (130) and / or the battery cells is transmitted at arbitrarily adjustable intervals during the discharge process.

17. A method according to any one of the preceding claims 6 to 16, wherein information of the unit (100) comprising the battery (130), such as its position, in particular its GPS position and / or its chassis number when the unit (100) comprising the battery (130) is an electric vehicle, is sent to a receiver, in particular to a mobile terminal device.

18. A method according to any one of claims 15 to 17, wherein information about a unit (100) comprising a battery or status information about a battery (130) and / or individual battery cells of a battery (130) is transmitted via a radio network, in particular a wide area network (WAN) or a global mobile radio standard network (GSM).

19. A method according to any one of the preceding claims 6 to 18, wherein the discharge in step c) is terminated or paused when a predetermined threshold value of the discharge state and / or charge state and / or voltage value and / or temperature value of the battery (130) to be discharged is reached.

20. A battery discharge system comprising: A unit (100) comprising a battery (130), in particular a battery (130) in an electric vehicle or a secondary life application, and further comprising a mobile discharge device (200) according to any one of claims 1 to 5, wherein the unit (100) comprising the battery (130) and the discharge device (200) can be connected to each other, in particular via a connecting cable (210, 215), so that electrical energy can be transmitted from the battery (130) to the discharge device (200), in particular by means of a method according to any one of claims 6 to 19.

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