Device for tempering an electrical energy storage device of a vehicle

Abstract

The invention relates to a device (100) for controlling the temperature of an electrical energy storage device (300) of a vehicle, wherein the energy storage device (300) has an energy storage module (301 to 304) with a plurality of individual cells arranged in a housing (306 to 308), and a temperature control circuit (200) fluidically connected to a housing interior of the housing (305 to 308) via an inlet (313 to 316) and an outlet (317 to 320), designed to guide a temperature control medium into the housing (305 to 308) and to remove the temperature control medium from the housing (305 to 308), wherein the temperature control medium can be guided in the housing interior with direct contact with the energy storage module (301 to 304), and at least one control device (102 to 105) designed to detect an electrical and / or thermal In case of failure (F) of the energy storage module (301 to 304),wherein the inlet (313 to 316) and the outlet (317 to 320) each have a valve (106 to 113) which is data-technically coupled to the at least one control device (102 to 105) and is designed to regulate the flow of the temperature control medium, and the at least one control device (102 to 105) is designed to transfer the valves (106 to 113) from an open state to a closed state in the event of an electrical and / or thermal fault (F).

Description

[0001] The invention relates to a device for controlling the temperature of an electrical energy storage device of a vehicle according to the preamble of claim 1.

[0002] EP 2 517 298 B1 discloses a device for controlling the temperature of a vehicle battery, comprising a first fluid path of an air conditioning unit with a first fan for controlling the temperature and guiding air, which opens into an interior of the vehicle, a second fluid path thermally associated with the battery for guiding a cooling medium of a radiator and the air conditioning unit, and a third fluid path associated with the air conditioning unit and leading through it for guiding a coolant of a refrigeration machine to generate cold. The first fluid path has a coolant-to-air heat exchanger of the third fluid path and, downstream of the third fluid path, a coolant-to-air heat exchanger of the second fluid path of the air conditioning unit.

[0003] The invention is based on the object of providing an improved device for tempering an electrical energy storage device.

[0004] The object is achieved according to the invention by a device which has the features specified in claim 1.

[0005] Advantageous embodiments of the invention are the subject of the subclaims.

[0006] The device according to the invention for temperature control of an electrical energy storage device of a vehicle, wherein the energy storage device has an energy storage module with a plurality of individual cells arranged in a housing, is characterized by a temperature control circuit fluidly connected to the interior of the housing via an inlet and an outlet, designed to guide a temperature control medium into the housing and to discharge the temperature control medium from the housing, wherein the temperature control medium can be guided in the interior of the housing with direct contact with the energy storage module, and at least one control device designed to detect an electrical and / or thermal fault of the energy storage module, wherein the inlet and the outlet each have a valve which is data-linked to the at least one control device and is designed to regulate the flow of the temperature control medium, and the at least one control device is designedTo move the valves from an open state to a closed state in the event of an electrical and / or thermal fault, for example, electrically, using a motor and a spring, or magnetically. Using this mechanism, a control device can be incorporated in each valve, which automatically closes in the event of a fault, for example, when the voltage drops below the set value.

[0007] The device uses valves in both the inlet and outlet directions to decouple the energy storage module from the temperature control circuit. In the event of a leak, for example, due to one or more mechanical damages to the energy storage module's housing, the amount of escaping temperature control medium can be reduced. If a flammable liquid, such as oil, or a flammable gas is used as the temperature control medium, the risk of fire can also be reduced. Furthermore, the decoupling achieved by the valves can prevent further temperature control medium from being fed into the housing in the event of a fault, for example, a thermal event in the energy storage module.Furthermore, this prevents components released in the event of a fault in the energy storage module, for example from bursting membranes of individual cells or escaping particles, from being transported into the temperature control circuit. This prevents or at least minimizes contamination of the temperature control medium in the disconnected temperature control circuit with foreign substances. If several energy storage modules are fluidically coupled to the temperature control circuit, contamination of these with foreign substances that arise in one energy storage module during the fault can be avoided or at least minimized. The valves can be integrated into the inlet and outlet in a particularly space-saving manner, so that the installation space requirements for implementing the device are particularly low. In addition, the valves offer the option of regulating the flow of the temperature control medium through the housing and thus the temperature control of the energy storage module.

[0008] Embodiments of the invention are explained in more detail below with reference to drawings.

[0009] Showing: Fig. 1 schematically shows a section of a device for controlling the temperature of an electrical energy storage device in a first state and the energy storage device and Fig. 2 schematically shows the section according to Fig. 1 in a second state of the device.

[0010] Corresponding parts are provided with the same reference numerals in all figures.

[0011] Fig. 1 shows a section of a possible embodiment of a device 100 for tempering an electrical energy storage device 300 in a first state and the energy storage device 300 itself.

[0012] The energy storage device 300 has a plurality of energy storage modules 301 to 304, wherein a number of the energy storage modules 301 to 304 may differ in embodiments not shown in detail.

[0013] Each energy storage module 301 to 304 has a housing 305 to 308, in which a cell block 309 to 312 comprising a plurality of electrically interconnected individual cells is arranged. An inlet 313 to 316 and an outlet 317 to 320 are arranged on each housing 305 to 308, wherein the respective inlet 313 to 316 and the respective outlet 317 to 320 are fluidically coupled to a housing interior of the respective housing 305 to 308.

[0014] The device 100 has a temperature control circuit 200, several control devices 102 to 105 and several valves 106 to 113.

[0015] The temperature control circuit 101 is flowed through by a liquid or gaseous temperature control medium and is or can be fluidically coupled to the inlets 313 to 316 and the outlets 317 to 320 via the valves 106 to 113, which are each part of an inlet 313 to 316 or an outlet 317 to 320.

[0016] The valves 106 to 113 each have a drive 114 to 121, by means of which the valves 106 to 113 can be converted from an open state to a closed state and vice versa. The drives 114 to 121 can be supplied with electrical energy, in particular, from at least one of the energy storage modules 301 to 304 or separately via another energy storage device.

[0017] The control devices 102 to 105 are each configured to monitor an operating state of the associated energy storage module 301 to 304 and, in doing so, to detect electrical and / or thermal faults of the respective energy storage module 301 to 304. For this purpose, the control devices 102 to 105 have a corresponding sensor system or are data-linked to such a system. The control devices 102 to 105 are supplied, in particular, with electrical energy from at least one of the energy storage modules 301 to 304.

[0018] The control devices 102 to 105 are each data-linked to the drives 114 to 121 of the valves 106 to 113 of the inlets 313 to 316 and outlets 317 to 320 of the associated energy storage module 301 to 304.

[0019] During normal operation of the energy storage device 300, the valves 106 to 113 are opened—as shown in the illustrated embodiment—to control the temperature of the energy storage modules 301 to 304, so that the temperature control medium flows through the respective housing interior of the energy storage modules 301 to 304 and controls the temperature of the cell blocks 309 to 312 located therein. The flow of the temperature control medium through the respective housing interior can be controlled by means of the control devices 102 to 105 by appropriately controlling the drives 114 to 121 of the valves 106 to 113.

[0020] Fig. 2 shows the section of the possible embodiment of the device 100 and the energy storage 300 according to Fig. 1 in a second state.

[0021] For example, if a fault F occurs in the energy storage module 302, a voltage drop is determined by means of the sensor system of the control device 103 and the fault F is detected. The fault F can, for example, be a voltage drop due to a thermal event or mechanical damage within the energy storage module 302.

[0022] If the control device 103 detects such a fault F, it transmits a control signal to the actuators 115, 119 of the valves 107, 111 to close them. The actuators 115, 119 then close the valves 107, 111 in such a way that no temperature control medium can flow into the interior of the housing 306 via the inlet 314. Furthermore, no temperature control medium can flow out of the interior of the housing 306 and into the temperature control circuit 200 via the outlet 318, thus preventing contamination of the temperature control circuit 200 and thus the other energy storage modules 301, 303, 304 with foreign substances resulting from the fault F.

[0023] The temperature control circuit 200 can thus continue to be operated in such a way that the additional energy storage modules 301, 303, 304 can be used and temperature controlled.

[0024] In a further embodiment of the device 100, the valves 106 to 113 can be designed as solenoid valves, which are open when a voltage is applied and close automatically as soon as the voltage falls below a threshold value. In this embodiment, the control devices 102 to 105 and the drives 114 to 121 are formed or integrated in the respective valves 106 to 113 themselves. The respective energy storage module 301 to 304 can ensure the voltage supply for the associated valves 106 to 113, so that no further sensors are necessary, since a voltage drop below a threshold value occurring in the event of a fault F ensures that the valves 106 to 113 close automatically and further flow of the temperature control medium through the respective interior of the housings 305 to 308 is prevented. List of reference symbols 100 device 102 Control device 103 Control device 104 Control device 105 Control device 106 Valve 107 Valve 108 Valve 109 Valve 110 Valve 111 Valve 112 Valve 113 Valve 114 Drive 115 drive 116 Drive 117 Drive 118 Drive 119 Drive 120 drive 121 drive 200 temperature control circuit 300 electrical energy storage units 301 Energy storage module 302 Energy storage module 303 Energy storage module 304 Energy storage module 305 housing 306 housing 307 housing 308 housing 309 Cellblock 310 Cellblock 311 Cellblock 312 Cellblock 313 inlet 314 inlet 315 inlet 316 inlet 317 Expiration 318 Expiration 319 Expiration 320 Expiration F Error case QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] EP 2 517 298 B1

[0002]

Claims

[1] Device (100) for controlling the temperature of an electrical energy storage device (300) of a vehicle, wherein the energy storage device (300) has an energy storage module (301 to 304) with a plurality of individual cells arranged in a housing (305 to 308), characterized by , - a temperature control circuit (200) fluidically connected to a housing interior of the housing (305 to 308) via an inlet (313 to 316) and an outlet (317 to 320), designed to guide a temperature control medium into the housing (305 to 308) and to remove the temperature control medium from the housing (305 to 308), wherein the temperature control medium can be guided in the housing interior with direct contact with the energy storage module (301 to 304), and - at least one control device (102 to 105) designed to detect an electrical and / or thermal fault (F) of the energy storage module (301 to 304), wherein - the inlet (313 to 316) and the outlet (317 to 320) each have a valve (106 to 113) which is data-technically coupled to the at least one control device (102 to 105) and is designed to regulate the flow of the tempering medium, and - the at least one control device (102 to 105) is designed to transfer the valves (106 to 113) from an open state to a closed state in the event of an electrical and / or thermal fault (F). [2] Device (100) according to claim 1, characterized by that the control device (102 to 105) is designed to determine an electrical voltage of the energy storage module (301 to 304) and to detect an electrical fault (F) if a predetermined voltage value is undershot. [3] Device (100) according to claim 1 or 2, characterized by , that - the valves (106 to 113) are operated by means of electrical energy from the energy storage module (301 to 304), - the open state of the valves (106 to 113) is present when an electrical voltage is applied to the energy storage module (301 to 304) and - if the electrical voltage of the energy storage module (301 to 304) falls below a predetermined voltage value, the valves (106 to 113) automatically change to the closed state.

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