Device and method for charging a battery of an electric boat, electric boat comprising the device

Abstract

Device and method for charging a battery of an electric boat, wherein, before and / or during charging of the battery, dry running of a seawater pump for supplying a cooling circuit of the electric boat is detected (200), and charging is interrupted (202) when dry running is detected. Electric boat comprising the device.

Description

The invention is based on a device and a method for charging a battery of an electric boat, and an electric boat comprising the device.DE 10 2023 101 984 A1 discloses a watercraft battery cooling system. A coolant channel is provided through which coolant circulates for cooling a battery. Cooling water flows through a cooling water passage. A heat exchanger is provided for heat exchange between the coolant and the cooling water. The cooling water passage includes a tank. The cooling system is configured such that the water can be stored in the tank when the watercraft is on the water. When the watercraft is land while the battery is being charged, the water stored in the tank may be used to circulate as cooling water through the cooling water channel.DE 10 2015 220 095 B3 discloses a cooling system for a high-voltage (HV) battery of a vehicle. The cooling system comprises a storage container for a coolant, a line system for the coolant with a line arranged in the high-voltage (HV) battery, and a pump arranged in the line system for pumping the coolant through the line. It further comprises a sensor, by means of which a loss of coolant from the line system can be detected and sensor signals can be generated. A control signal can be generated by a control unit coupled to the pump and the sensor on the basis of the sensor signals.A seawater pump which moves seawater through a cooling circuit for cooling, in particular for cooling, is only capable of dry running to a limited extent (component protection).Direct current (DC) fast charging may only be permitted if the heat is dissipated into the sea water via the coolant.As soon as the dry-running detection of the sea water pump triggers, the DC rapid charging process must be interrupted or must not be enabled.The method for charging a battery of an electric boat provides that before and / or during the charging of the battery a running dry of a seawater pump for supplying a cooling circuit of the electric boat is detected, and the charging is interrupted if the running dry is detected during the charging. In the example, the battery and / or power electronics for charging the battery with the cooling circuit are cooled.The running dry is detected when a float, which is arranged in a seawater filter through which the seawater pump moves water for supplying the cooling circuit, reaches a lower stop.The charging of the battery is continued, for example, when the float leaves the lower stop or reaches an upper stop.The device comprises a computing device which is designed to detect a running dry of a seawater pump for supplying a cooling circuit of the electric boat before and / or during the charging of the battery, and to interrupt the charging if the running dry is detected.It is provided that the device is configured to detect the running dry when a float, which is arranged in a seawater filter through which the seawater pump moves water for supplying the cooling circuit, reaches a lower stop.It may be provided that the device is configured to continue charging the battery when the float leaves the lower stop or reaches an upper stop.An electric boat comprising the device may be provided.Further advantageous embodiments can be seen from the following description and the drawing. The drawing shows: FIG. 1 shows a schematic illustration of an apparatus 100 for charging a battery of an electric boat, FIG. 2 shows a flow chart with steps of a method for charging the electric boat.FIG. 1 schematically illustrates an apparatus 100 for charging a battery of an electric boat.The apparatus 100 comprises a computing device 101 and a float 102. The float 102 is arranged, for example, in a seawater filter 103, through which the seawater pump moves water for supplying the cooling circuit.The computing device 101 is configured to detect a running dry of a seawater pump for supplying a cooling circuit of the electric boat before and / or during the charging of the battery, and to interrupt the charging if the running dry is detected.The device 100 is configured, for example, to detect the running dry when the float 102 reaches a lower stop 104.For example, the device 100 is configured to continue charging the battery when the float 102 leaves the lower stop 104 or reaches an upper stop 105.It is provided that an electric boat comprises the device.FIG. 2 shows a flow chart of a method for charging the battery of the electric boat.In the example, the battery is charged in a rapid charging process. The battery is charged with, for example, direct current.The method comprises a step 200. Step 200 is carried out before and / or during charging of the battery.In step 200, a check is made as to whether or not a running dry of the sea water pump for supplying a cooling circuit of the electric boat is detected.The dry run is detected when the float 102 reaches the lower stopper 104.When the dry running is detected, a step 202 is executed.Otherwise, a step 201 is carried out.In step 201, charging is started. Step 200 is then executed.In step 202, the charging is interrupted.In a step 203, it is checked whether or not the charging of the battery can be continued.It will be appreciated that charging of the battery may continue when the float 102 leaves the lower stop 104 or reaches the upper stop 105.If charging can be continued, a step 204 is executed. Otherwise, step 202 is carried out.In step 204, charging is continued.Step 200 is then executed.List of reference characters100 Device 101 Computing device 102 Float 103 Seawater filter 104 Stop 105 Stop 200 Step 201 Step 202 Step 203 Step 204 Step

Claims

Method for charging a battery of an electric boat, wherein before and / or during the charging of the battery a run-dry of a sea water pump for supplying a cooling circuit of the electric boat is detected (200), and the charging is interrupted (202) if the run-dry is detected, wherein the run-dry is detected (200) if a float (102), which is arranged in a sea water filter (103) through which the sea water pump moves water for supplying the cooling circuit, reaches a lower stop (104).The method of claim 1, characterized in that the charging of the battery continues (204) when the float (102) leaves the bottom stop (104) or reaches (203) a top stop (105).Device (100) for charging a battery of an electric boat, wherein the device (100) comprises a computing device (101) which is designed to detect a run-dry of a seawater pump for supplying a cooling circuit of the electric boat before and / or during the charging of the battery, and to interrupt the charging if the run-dry is detected, wherein the device (100) is designed to detect the run-dry if a float (102) which is arranged in a seawater filter (103) through which the seawater pump moves water for supplying the cooling circuit reaches a lower stop (104).The device (100) according to claim 3, characterized in that the device (100) is configured to continue charging the battery when the float (102) leaves the lower stop (104) or reaches an upper stop (105).An electric boat, characterized in that the electric boat comprises the device according to any one of claims 3 or 4.

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