Electric energy storage device, system for storing an electric energy storage device, and method for storing an electric energy storage device

Abstract

The present invention relates to an electrical energy storage device, a system for storing an electrical energy storage device, and a method for storing an electrical energy storage device. An electrical energy storage device (1), a system for storing the electrical energy storage device (1), and a method for storing the electrical energy storage device (1), wherein the electrical energy storage device (1) has at least a first electrical energy storage unit, a control unit, a first electrical connection terminal (2), and a switching element, and wherein the control unit is configured to control the switching element.

Description

Field of the Invention

[0001] The present invention relates to an electrical energy storage device, a system for storing an electrical energy storage device, and a method for storing an electrical energy storage device according to the preamble of the independent patent claim. Background Art

[0002] DE 20 2017 103 438 U1 shows a storage system for storing a lithium battery pack.

[0003] DE 10 2013 217 457 A1 shows a battery pack having a plurality of battery cells, a connection terminal, and an interruption element for connecting the battery pack.

[0004] DE 40 36 373 C2 shows a charging device for a storage battery and a rechargeable battery pack.

[0005] DE 38 53 864 T2 shows a battery pack charging device. Summary of the Invention

[0006] The core of the present invention in terms of the electrical energy storage device is that the electrical energy storage device has at least an electrical energy storage unit, a control unit, a first electrical connection terminal, and a switching element, wherein the control unit is configured to control the switching element.

[0007] The background of the present invention is that the control unit and the switching element that can be controlled by the control unit can be integrated into the electrical energy storage device. Thus, the electrical energy storage unit can be connected to a charging device and / or a consumer by means of the first electrical connection terminal according to its state parameters, in particular the charge state and / or voltage. Here, an external switching unit can be omitted.

[0008] Other advantageous embodiments of the present invention are the subject matter of the dependent claims.

[0009] According to an advantageous design, the electrical energy storage device has a signal interface that is signal-connected to the control unit. Advantageously, the control unit of the electrical energy storage device can be connected to a superior control device, in particular a charging control device, by means of the signal interface.

[0010] Advantageously, the electrical energy storage device has sensors, in particular a temperature sensor and / or a pressure sensor and / or a voltage sensor and / or a current sensor and / or a charge state sensor, wherein the sensors are signal-connected to the control unit. The state parameters of the electrical energy storage device can be monitored by means of the sensors. The sensors can be analyzed by means of the control unit. The control unit is configured to switch the switching element according to the state parameters.

[0011] Advantageously, the electrical energy storage device has a second electrical connection terminal which is conductively connected to the control unit. As a result, the control unit can be supplied with power by means of an external voltage source. Thus, the control unit can operate independently of the electrical energy storage unit.

[0012] Advantageously, the switching element is arranged between the electrical energy storage unit and the first electrical connection terminal. As a result, the electrical energy storage unit can be connected to the first electrical connection terminal and can be separated from the first electrical connection terminal.

[0013] It is advantageous here that the switching element is de-energized in a standard-compliant manner and / or is reversible. Thus, in particular in the event of a malfunction of the control unit, unwanted charging or discharging of the electrical energy storage device can be avoided.

[0014] The core of the invention in terms of a system for storing an electrical energy storage device, in particular an electrical energy storage device as described above or according to one of the claims regarding the electrical energy storage device, lies in the fact that the system has a charging device, a charging control device, a charging rail, a switching device and a charging connection terminal, wherein the charging rail, the switching device and the charging connection terminal are conductively connected to one another, wherein the switching device is arranged between the charging device and the charging rail, and wherein the charging control device is configured to control the switching device in order to conductively connect the charging device to the charging rail or to separate the charging device from the charging rail.

[0015] The background of the invention is that in the case of storing an electrical energy storage device, the electrical energy storage device can be charged when needed. For this purpose, the electrical energy storage device is monitored, and if the state parameter of the electrical energy storage device is below or above a critical value, the switching device is closed and the electrical energy storage device is charged. As a result, the electrical energy storage device can be stored in a low state of charge, and deep discharge of the electrical energy storage device due to self-discharge can be prevented.

[0016] Advantageously, the charging device is connected to the charging rail in a separable manner.

[0017] According to an advantageous design, the system has a low-voltage voltage source, in particular wherein the low-voltage voltage source is configured to supply power to the control unit of the electrical energy storage device. It is advantageous here that the control unit can operate independently of the electrical energy storage unit.

[0018] Advantageously, the charging rail is implemented as a conductor loop. Thus, a plurality of electrical energy storage devices can be arranged in parallel and can be connected to the charging device. Thus, one charging device can be used for a plurality of electrical energy storage devices, which can be charged successively in time.

[0019] Advantageously, the system has at least one further charging connection terminal which is arranged in parallel with the charging connection terminal. Thus, one charging device can be used for a plurality of electrical energy storage devices, which can be charged successively in time.

[0020] Advantageously, the charging control device is integrated into the charging device. Thus, the system can be implemented compactly.

[0021] The core of the present invention in the method for storing an electrical energy storage device, in particular an electrical energy storage device as described above or as described in one of the claims regarding the electrical energy storage device, lies in that the method has the following method steps that are continuous in time: wherein in the first method step, the electrical energy storage device is connected to the system; wherein in the second method step, the first connection end of the electrical energy storage device is connected to the charging rail of the system; wherein in the third method step, the switching element of the electrical energy storage device is closed; and wherein in the fourth method step, the electrical energy storage device is charged.

[0022] The background of the present invention is that the electrical energy storage device is connected to the system for storage. During storage, at least one state parameter of the electrical energy storage device is monitored. If the state parameter exceeds or is lower than a limit value, the electrical energy storage device is automatically charged.

[0023] Advantageously, in the second method step, the second connection end of the electrical energy storage device is connected to a low-voltage voltage source. Thereby, the control unit can operate independently of the electrical energy storage unit.

[0024] Advantageously, in the second method step, the signal interface of the electrical energy storage device is connected to the charging control device of the system. Thus, the charging control device can be signal-connected to the sensor and / or control unit of the electrical energy storage device via the signal interface.

[0025] Advantageously, in the third method step, if the state parameter of the electrical energy storage device, in particular the charge state and / or voltage and / or temperature and / or pressure, exceeds or is lower than a limit value, the switching element is closed. During storage, the electrical energy storage device is separated from the charging device and is connected to the charging device via the switching element only when the state parameter exceeds or is lower than the limit value.

[0026] According to an advantageous design, in the fourth method step, the switching device of the system is closed and the charging rail is energized by the charging device. Advantageously, only one electrical energy storage device is always connected to the charging device. Thereby, a low-power charging device can be used for multiple electrical energy storage devices.

[0027] According to an alternative advantageous design, in the fourth method step, the other switching elements of other electrical energy storage devices that are also connected to the charging rail are closed, so that the charging rail is energized by the other electrical energy storage devices. Advantageously, when the charging device fails, the electrical energy storage device can be charged by the other electrical energy storage devices. Thereby, for example, deep discharge of the electrical energy storage device can be avoided even when the charging device fails.

[0028] Advantageously, the other electrical energy storage device has a higher state of charge than the electrical energy storage device.

[0029] As long as it is reasonable, the above design solutions and expansion solutions can be arbitrarily combined with each other. Other possible design solutions, expansion solutions, and implementation solutions of the present invention also include combinations of features not explicitly mentioned in the present invention described above or hereinafter with respect to the embodiments. Herein, those skilled in the art will in particular also add individual aspects as improvement solutions or supplementary solutions to the corresponding basic forms of the present invention. Description of the Drawings

[0030] In the following paragraphs, the present invention is illustrated based on embodiments from which other inventive features can be obtained, but the present invention is not limited to these inventive features within its scope. These embodiments are shown in the drawings.

[0031] Wherein:

[0032] Figure 1 shows a schematic diagram of a system 10 for storing an electrical energy storage device 1 according to the present invention; and

[0033] Figure 2 shows a flowchart of a method for storing the electrical energy storage device 1 according to the present invention. Detailed Description of the Invention

[0034] In Figure 1 the electrical energy storage device 1 according to the present invention shown has at least an electrical energy storage unit, a control unit, a first electrical connection terminal 2, a second electrical connection terminal 4, a switching element, a sensor, and a signal interface 3.

[0035] The switching element is arranged between the first electrical connection terminal 2 and the electrical energy storage unit. Herein, the switching element is integrated into the electrical energy storage device. The switching element is implemented reversibly. The switching element is disconnected in a standard manner.

[0036] The second electrical connection terminal 4 is conductively connected to the control unit.

[0037] The signal interface 3 is connected to the control unit in a signal-conducting manner. The signal interface 3 can be implemented as a wireless interface, for example, can be implemented as a Bluetooth interface or a WLAN interface, or can be implemented as a wired interface.

[0038] The sensor is connected to the control unit in a signal-conducting manner. The sensor is suitable for detecting at least one state parameter of the electrical energy storage device. For example, the sensor can be implemented as a temperature sensor, a pressure sensor, a voltage sensor, a current sensor, or a state of charge sensor.

[0039] The system 10 for storing the electrical energy storage device 1 according to the invention has a charging device 5, a charging control device, a charging rail 7, a switching device 6, a charging connection 8 and a low-voltage voltage source 9.

[0040] The charging device 5 can be conductively connected to the charging rail 7 by means of the switching device 6. The charging rail 7 is connected to each electrical energy storage device 1 by means of a respective charging connection 8. According to the embodiment shown in Figure 1 , the system 10 is designed to store a plurality of electrical energy storage devices 1, in particular three electrical energy storage devices 1, and has a number of charging connections 8 corresponding to the number of electrical energy storage devices 1 that can be stored.

[0041] The charging rail 7 is implemented as a conductor loop. Each charging connection 8 has two electrical conductors by means of which the respective electrical energy storage device 1 is connected to the charging rail 7 by means of its first electrical connection 2.

[0042] The electrical energy storage device 1 is connected in parallel with the charging device 5.

[0043] A switching element of the electrical energy storage device 1 and a switching device 6 of the charging device 5 are electrically connected between the electrical energy storage unit of the electrical energy storage device 1 and the charging device 5.

[0044] The low-voltage voltage source 9 is connected to the respective second electrical connection 4 of the respective electrical energy storage device 1. The respective control unit of the respective electrical energy storage device 1 can be fed by the low-voltage voltage source 9.

[0045] The charging control device is conductively connected to the control unit of the respective electrical energy storage device 1 by means of a respective signal interface 3. Preferably, the charging control device is integrated into the charging device 5.

[0046] In Figure 2 , the method 100 according to the invention for storing the electrical energy storage device 1 has the following method steps that are continuous in time:

[0047] In the first method step 101, the electrical energy storage device 1 is connected to the system 10 for storing the electrical energy storage device 1.

[0048] In the second method step 102, the first connection 2 of the electrical energy storage device 1 is connected to the charging rail 7 of the system 10. The second connection 4 of the electrical energy storage device 1 is connected to the low-voltage voltage source 9. The signal interface 3 of the electrical energy storage device 1 is connected to the charging control device of the system 10.

[0049] In the third method step 103, if the state parameters of the electrical energy storage device 1, in particular the charge state and / or voltage and / or temperature and / or pressure, exceed or fall below a limit value, the switching element of the electrical energy storage device 1 is closed.

[0050] In the fourth method step 104, the electrical energy storage device 1 is charged.

[0051] For this purpose, the switching device of the system 10 is closed and the charging rail 7 is energized by the charging device 5.

[0052] Alternatively, in order to charge the electrical energy storage device 1, other switching elements of other electrical energy storage devices, which are also connected to the charging rail 7, are closed, so that the charging rail 7 is energized by the other electrical energy storage devices. Here, the other electrical energy storage devices have a higher state of charge than the electrical energy storage device 1.

[0053] In this case, an electrical energy storage device is understood to be: a rechargeable energy storage device, which particularly has an electrochemical energy storage unit; and / or an energy storage module, which has at least one electrochemical energy storage unit; and / or an energy storage device pack, which has at least one energy storage module. The energy storage unit can be implemented as a lithium-based battery cell, in particular a lithium-ion battery cell. Alternatively, the energy storage unit is implemented as a lithium-polymer battery cell or a nickel-metal hydride battery cell or a lead-acid battery cell or a lithium-air battery cell or a lithium-sulfur battery cell.

Claims

1. System (10) for storing an electrical energy storage device (1), The system (10) has an electrical energy storage device (1), a charging device (5), a charging control device, a charging rail (7), a switching device (6) and a charging connection (8), wherein the electrical energy storage device (1) has at least an electrical energy storage unit, a control unit, a first electrical connection (2), a switching element and sensors, the sensors including a temperature sensor and / or a pressure sensor and / or a voltage sensor and / or a current sensor and / or a charge state sensor, and the sensors are in signal connection with the control unit, wherein the control unit is configured to close the switching element to charge the electrical energy storage device (1) when the charge state and / or voltage and / or temperature and / or pressure of the electrical energy storage device (1) exceeds or falls below a limit value, so that the electrical energy storage device is stored in a low charge state, wherein the switching element is normally open and reversible, wherein the charging rail (7), the switching device (6) and the charging connection (8) are conductively connected to each other, wherein the switching device (6) is arranged between the charging device (5) and the charging rail (7), wherein the charging control device is configured to control the switching device (6) to conductively connect the charging device (5) and the charging rail (7) to each other or to separate the charging device (5) from the charging rail (7).

2. The system (10) for storing an electrical energy storage device (1) according to claim 1, characterized in that the system (10) has a low-voltage voltage source (9), wherein the low-voltage voltage source (9) is configured to supply power to the control unit of the electrical energy storage device (1).

3. The system (10) for storing an electrical energy storage device (1) according to claim 1, characterized in that the charging rail (7) is implemented as a conductor loop.

4. The system (10) for storing an electrical energy storage device (1) according to any one of claims 1 to 3, characterized in that the system (10) has at least one other charging connection, and the at least one other charging connection is arranged in parallel with the charging connection (8).

5. The system (10) for storing an electrical energy storage device (1) according to any one of claims 1 to 3, characterized in that the charging control device is integrated into the charging device (5).

6. The system (10) for storing an electrical energy storage device (1) according to any one of claims 1 to 3, characterized in that the electrical energy storage device (1) has a signal interface (3), and the signal interface is in signal connection with the control unit.

7. The system (10) for storing an electrical energy storage device (1) according to any one of claims 1 to 3, characterized in that the electrical energy storage device (1) has a second electrical connection (4), and the second electrical connection is conductively connected to the control unit.

8. The system (10) for storing an electrical energy storage device (1) according to any one of claims 1 to 3 above, characterized in that the switching element is arranged between the electrical energy storage unit and the first electrical connection.

9. A method (100) for storing an electrical energy storage device (1) by means of a system (10) for storing an electrical energy storage device (1) according to one of claims 1 to 8, the method having the following temporally consecutive method steps: wherein in a first method step (101), the electrical energy storage device (1) is connected to the system (10); wherein in a second method step (102), a first connection end (2) of the electrical energy storage device (1) is connected to a charging rail (7) of the system (10); wherein in a third method step (103), if the charge state and / or voltage and / or temperature and / or pressure of the electrical energy storage device (1) exceeds or falls below a limit value, a switching element of the electrical energy storage device (1) is closed; wherein in a fourth method step (104), the electrical energy storage device (1) is charged.

10. The method (100) according to claim 9, characterized in that in the second method step (102), a second connection end (4) of the electrical energy storage device (1) is connected to a low-voltage voltage source (9), and / or a signal interface (3) of the electrical energy storage device (1) is connected to a charging control device of the system (10).

11. The method (100) according to one of claims 9 to 10, characterized in that in the fourth method step (104), a switching device of the system (10) is closed and the charging rail (7) is energized by a charging device (5).

12. The method (100) according to one of claims 9 to 10, characterized in that in the fourth method step (104), other switching elements of other electrical energy storage devices that are also connected to the charging rail (7) are closed, such that the charging rail (7) is energized by the other electrical energy storage devices, wherein the other electrical energy storage devices have a higher charge state than the electrical energy storage device (1).

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