TWM629470U - Autonomously activated electric energy storage device - Google Patents

Abstract

The present invention discloses an autonomously activated electric energy storage device, which includes a first battery cell, a second battery cell, a temperature detection circuit, a first bidirectional charger, a second bidirectional charger, and a control circuit. When the control circuit determines that the temperature of the battery cell is equal to or lower than the lower limit of the operating temperature through the temperature detection circuit, the control circuit makes the first bidirectional charger and the first battery cell conduct, and the second bidirectional charger and the second battery cell conduct, and The power transfer between the first battery cell and the second battery cell is controlled through the first bidirectional charger and the two bidirectional chargers until the temperature of the first battery cell and the temperature of the second battery cell are both higher than the lower limit of the working temperature.

Description

Autonomously activated electrical energy storage device

The present invention relates to a battery energy storage device, in particular to a battery energy storage device that selectively transfers electricity.

In recent years, many industrialized countries have paid more and more attention to the problem of air pollution, and one of the main causes of air pollution is the increase in carbon emissions year by year. Exhaust gas emitted by automobiles is one of the reasons for the increase in carbon emissions year by year. Therefore, many countries have begun to attach importance to the research and development of electric vehicles in order to achieve the purpose of reducing carbon emissions.

The power source of an electric vehicle is the battery module. The battery module contains multiple battery cells. In addition to the charging efficiency of the battery cells, which needs to meet the needs of consumers, the cycle life and safety of the battery cells are also very important. The types of battery modules currently used in electric vehicles include, for example, lead-acid battery modules, nickel-metal hydride battery modules, and lithium iron phosphate battery modules, and the battery cells of each battery module correspond to different low-temperature operating temperatures. When the ambient temperature drops, so that the temperature of the battery cell is lower than the low temperature operating temperature. At this time, the activity of the electrolyte of the battery cell drops rapidly, which in turn leads to a rapid loss of battery power, which greatly reduces the usable time of the battery.

In order to prevent the temperature of the battery from being lower than the low-temperature operating temperature, the current solution is to heat the battery through an electric heating rod disposed on the battery when the temperature of the battery is lower than the low-temperature operating temperature, so that the temperature of the battery is higher than the low-temperature operating temperature. However, the electric heating rod occupies space in the battery module, and the activation of the battery rod must consume the power stored in the battery module.

The technical problem to be solved by this creation is to provide an autonomously activated electric energy storage device in view of the deficiencies of the prior art.

In order to solve the above-mentioned technical problems, one of the technical solutions adopted in this creation is to provide an autonomously activated electric energy storage device, which includes a first battery cell, a second battery cell, a temperature detection circuit, a first bidirectional The charger, a second bidirectional charger and a control circuit. The control circuit is connected to the first bidirectional charger, the second bidirectional charger, the first battery cell and the second battery cell. The control circuit makes the first bidirectional charger and the first battery cell conduct, and the second bidirectional charger and the second battery cell conduct, and controls the first battery cell and the second battery through the first bidirectional charger and the second bidirectional charger The power transfer is performed between the cells until the temperature of the first battery core and the temperature of the second battery core are both higher than the lower limit of the operating temperature.

One of the beneficial effects of the present invention is that, through the autonomously activated electrical energy storage device provided by the present invention, the power transfer between the first battery cell and the second battery cell can be performed continuously. When power is transferred between two battery cells, an energy level change will occur inside each battery cell, and the energy level change will generate kinetic energy. When kinetic energy is generated in each battery cell, the battery cell is switched from a resting state to an activated state. The temperature of the battery cell in the activated state is not easily dropped below the lower limit of the operating temperature due to environmental factors. In this way, even in a low temperature environment, the power of the battery cell will not be quickly lost and the life of the battery cell will not be damaged. In addition, each battery cell is in an active state completely through the continuous transfer of power between the plurality of battery cells, without any external power supply. Based on the law of immortality of energy, no matter how the power is transferred, the total power of all battery cells remains unchanged, and the effect of saving power is also achieved.

In order to further understand the features and technical content of this creation, please refer to the following detailed descriptions and drawings about this creation, however, the provided drawings are only for reference and description, and are not intended to limit this creation.

The following are specific specific examples to illustrate the implementation of the "autonomous activated electrical energy storage device" disclosed in the present creation, and those skilled in the art can understand the advantages and effects of the present creation from the content disclosed in this specification. This creation can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this creation. In addition, the drawings in this creation are only for simple schematic illustration, and are not drawn according to the actual size, and are stated in advance. The following embodiments will further describe the related technical contents of the present creation in detail, but the disclosed contents are not intended to limit the protection scope of the present creation.

It should be understood that although terms such as "first", "second" and "third" may be used herein to describe various elements or signals, these elements or signals should not be limited by these terms. These terms are primarily used to distinguish one element from another element, or a signal from another signal. In addition, the term "or", as used herein, should include any one or a combination of more of the associated listed items, as the case may be.

FIG. 1 is a functional block diagram of a first embodiment of an autonomously activated electrical energy storage device of the present invention. As shown in FIG. 1 , the autonomously activated electrical energy storage device 100 includes a first battery cell B1 , a second battery cell B2 , a third battery cell B3 , a temperature detection circuit TD and a control circuit 1 . The first battery cell B1 , the second battery cell B2 and the third battery cell B3 are electrically connected to each other, and the temperature detection circuit TD is electrically connected to the second battery cell B2 and detects the cell temperature of the second battery cell B2 . Since the first battery cell B1 , the second battery cell B2 and the third battery cell B3 are all packaged in the casing of the autonomously activated electrical energy storage device 100 , the battery cell temperature of the second battery cell B2 is approximately the same as that of the first battery cell B1 and the battery cell temperature of the third battery cell B3.

The control circuit 1 is, for example, one or any combination of an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), and a system-on-chip (SOC), and can be combined with other related circuit components and firmware to Implement the following functional operations.

The control circuit 1 is electrically connected to the temperature detection circuit TD to obtain the temperature of the battery cell. The autonomously activated electrical energy storage device 100 further includes a first voltage detector VD1, a second voltage detector VD2 and a third voltage detector VD3, and the first voltage detector VD1 and the second voltage detector VD1 The voltage detector VD2 and the third voltage detector VD3 are respectively electrically connected to the first battery cell B1, the second battery cell B2 and the third battery cell B3 to detect the first voltage of the first battery cell B1 and the voltage of the second battery cell B2. The second voltage and the third voltage of the third battery cell B3. The control circuit 1 is electrically connected to the first voltage detector VD1 , the second voltage detector VD2 and the third voltage detector VD3 to obtain the first voltage, the second voltage and the third voltage.

The autonomously activated electrical energy storage device 100 further includes a first bidirectional charger BEC1 , a second bidirectional charger BEC2 , a third bidirectional charger BEC3 and a memory 2 . A first end of the first bidirectional charger BEC1 is connected to the first battery cell B1, a first end of the second bidirectional charger BEC2 is connected to the second battery cell B2, and a first end of the third bidirectional charger BEC3 is connected to in the third battery cell B3. A second end of the first bidirectional charger BEC1, a second end of the second bidirectional charger BEC2, and a second end of the third bidirectional charger BEC3 are connected together.

The control circuit 1 is electrically connected to the first bidirectional charger BEC1 , the second bidirectional charger BEC2 , the third bidirectional charger BEC3 and the memory 2 , the memory 2 stores a power transfer program, and the control circuit 1 is used to execute the memory 2 The power transfer program within the power transfer program, wherein the power transfer program includes a plurality of adjustable parameters, and these adjustable parameters include the lower limit of the operating temperature, the first voltage setting value of the first battery cell B1, and the second battery cell B2. Voltage setting value, third voltage setting value of the third battery cell B3, maximum continuous charging current, maximum continuous discharging current, discharge peak current, discharge peak time, charging upper limit voltage and discharge cutoff voltage. In addition, the temperature of the battery cell obtained by the control circuit 1 from the temperature detection circuit TD is stored in the memory 2 every time.

When the control circuit 1 executes the power transfer program, the control circuit 1 determines whether the temperature of the battery cell is equal to or lower than the lower limit of the operating temperature (for example, minus 10 degrees Celsius). When the control circuit 1 determines that the temperature of the battery cell is equal to or lower than the lower limit of the operating temperature, the control circuit 1 adjusts the first voltage setting value, the second voltage setting value and the third voltage setting value, and controls the first bidirectional charger BEC1, the second voltage setting value and the second voltage setting value. The bidirectional charger BEC2 and the third bidirectional charger BEC3 and the first battery cell B1 , the second battery cell B2 and the third battery cell B3 are respectively switched from the off state to the on state.

Specifically, the first bidirectional charger BEC1 includes a first charging circuit BC1 and a first switch SW1, the first switch SW1 is connected between a first end of the first charging circuit BC1 and the first battery cell B1, and The first switch SW1 is normally turned off. The second bidirectional charger BEC2 includes a second charging circuit BC2 and a second switch SW2, the second switch SW2 is connected between a first end of the second charging circuit BC2 and the second battery cell B2, and the second switch SW2 The normal state is disconnected. The third bidirectional charger BEC3 includes a third charging circuit BC3 and a third switch SW3, the third switch SW3 is connected between a first end of the third charging circuit BC3 and the third battery cell B3, and the third switch SW3 The normal state is disconnected. A second end of the first charging circuit BC1, a second end of the second charging circuit BC2, and a second end of the third charging circuit BC3 are connected to each other.

The control circuit 1 is connected to the first switch SW1, the second switch SW2 and the third switch SW3 and controls the first switch SW1, the second switch SW2 and the third switch SW3 to switch from the off state to the on state or from the on state to the off state. open state.

For example, the first switch SW1, the second switch SW2 and the third switch SW3 are MOS transistors, and the voltage values of the three signals provided by the control circuit 1 to the first switch SW1, the second switch SW2 and the third switch SW3 are all The first switch SW1 , the second switch SW2 and the third switch SW3 can be switched from the off state to the on state when the threshold voltage is equal to or higher than the threshold voltage of the MOS transistor.

When the control circuit 1 adjusts the first voltage setting value, the second voltage setting value and the third voltage setting value and controls the first switch SW1 , the second switch SW2 and the third switch SW3 to be in an on state, the first battery cell B1 , the third switch In order to achieve the adjusted first voltage setting value, second voltage setting value and third voltage setting value of the second battery cell B2 and the third battery cell B3, the first battery cell B1, the second battery cell B2 and the third battery cell B3 Power transfer between them. There are various forms of power transfer. For example, the power transfer between the first battery cell B1 and the second battery cell B2 is performed through the first bidirectional charger BEC1 and the second bidirectional charger BEC2, or the first bidirectional charger BEC2 is used to transfer power between the first battery cell B1 and the second battery cell B2. The charger BEC1 and the second bidirectional charger BEC3 transfer the power between the first battery cell B1 and the third battery cell B3, or through the second bidirectional charger BEC2 and the third bidirectional charger BEC3, the second battery cell B2 and the Power transfer is performed between the third battery cells B3. When power is transferred between the first battery cell B1, the second battery cell B2 and the third battery cell B3, the energy level changes are generated inside the first battery cell B1, the second battery cell B2 and the third battery cell B3, and A change in energy level generates kinetic energy. Since kinetic energy is generated inside the first battery cell B1 , the second battery cell B2 and the third battery cell B3 , the first battery cell B1 , the second battery cell B2 and the third battery cell B3 are in an activated state.

When the first battery cell B1 , the second battery cell B2 and the third battery cell B3 are in an activated state, the temperature of the battery cells will gradually increase. When the temperature of the battery cell is higher than the lower limit of the operating temperature, the control circuit 1 controls the first switch SW1, the second switch SW2 and the third switch SW3 to switch from the on state to the off state, so as to stop the first battery cell B1 and the second battery cell B2 And the power transfer between the third battery cells B3.

FIG. 2A is a schematic diagram of a plurality of battery cells in a balanced state. As shown in FIG. 2A , the first battery core B1 , the second battery core B2 and the third battery core B3 are connected in series with each other, and the negative electrode of the first battery core B1 and the positive electrode of the third battery core B3 are respectively connected to the first output terminal O1 and the The second output terminal O2. The initial first voltage setting value VS1 of the first battery cell B1, the second voltage setting value VS2 of the second battery cell B2, and the third voltage setting value VS3 of the third battery cell B3 are all equal (for example, 3.2 volts). When the voltage of a battery cell B1, the voltage of the second battery cell B2 and the voltage of the third battery cell B3 reach the first voltage setting value VS1, the second voltage setting value VS2 and the third voltage setting value VS respectively, the first battery cell The voltages of B1 , the second battery cell B2 and the third battery cell B3 are in a balanced state.

FIG. 2B is a schematic diagram of a plurality of battery cells in an unbalanced state. As shown in FIG. 2B , when the temperature of the surrounding environment drops rapidly, the temperature of the battery cell is lower than the lower limit of the working temperature. The control circuit 1 adjusts the first voltage setting value VS1, the second voltage setting value VS2 and the third voltage setting value VS3, and the adjusted first voltage setting value VS1', the adjusted second voltage setting value VS2' and the adjusted The third voltage setting values VS3' are respectively 4 volts, 2.5 volts and 3.1 volts. The first battery cell B1, the second battery cell B2 and the third battery cell reach the adjusted first voltage setting value VS1', the adjusted second voltage setting value VS2' and the adjusted third voltage setting value VS3' , power transfer is performed between the first battery cell B1 , the second battery cell B2 and the third battery cell B3 . Regarding the aspect of power transfer, for example, part of the power of the first battery cell B1 can be transferred to the second battery cell B2 and the third battery cell B3, or part of the power of the second battery cell B2 can be transferred to the first battery cell B1 and the third battery cell B3, or part of the power of the third battery cell B3 can be transferred to the first battery cell B1 and the second battery cell B2. When the voltage of the first battery cell B1, the voltage of the second battery cell B2, and the voltage of the third battery cell B3 reach the adjusted first voltage setting value VS1', the adjusted second voltage setting value VS2', and the adjusted When the voltage of the first battery cell B1 , the second battery cell B2 and the third battery cell B3 is in an unbalanced state, when the third voltage setting value VS3 ′ is reached.

Regarding the power transfer between the first battery cell B1, the second battery cell B2, and the third battery cell B3, in addition to the aspects of FIG. 2A and FIG. 2B , other aspects are also possible.

For example, initially the voltages of the first battery cell B1 , the second battery cell B2 and the third battery cell B3 are not completely the same and are in an unbalanced state. The control circuit 1 adjusts the first voltage setting value, the second voltage setting value and the third voltage setting value and controls the first bidirectional charger BEC1 , the second bidirectional charger BEC2 and the third bidirectional charger BEC3 . When the first battery cell B1, the second battery cell B2 and the third battery cell B3 reach the adjusted first voltage setting value, the adjusted second voltage setting value and the adjusted third voltage setting value respectively, the first The battery cell B1, the second battery cell B2, and the third battery cell B3 transition from an unbalanced state to a balanced state.

For example, initially the voltages of the first battery cell B1 , the second battery cell B2 and the third battery cell B3 are not completely the same and are in the first unbalanced state. The control circuit 1 adjusts the first voltage setting value, the second voltage setting value and the third voltage setting value and controls the first bidirectional charger BEC1 , the second bidirectional charger BEC2 and the third bidirectional charger BEC3 . When the first battery cell B1, the second battery cell B2 and the third battery cell B3 reach the adjusted first voltage setting value, the adjusted second voltage setting value and the adjusted third voltage setting value respectively, the first The battery cell B1, the second battery cell B2 and the third battery cell B3 are transformed from the first unbalanced state to the second unbalanced state, wherein the first voltage setting value and the second voltage setting in the second unbalanced state The value and the third voltage setting value are respectively different from the first voltage setting value, the second voltage setting value and the third voltage setting value in the first unbalanced state.

It can be seen from this that the state of the power transfer between the first battery cell B1, the second battery cell B2 and the third battery cell B3 includes transitioning from a balanced state to an unbalanced state, from an unbalanced state to a balanced state, or From the first non-equilibrium state to the second non-equilibrium state. However, no matter which state is mentioned above, the total power of the first battery cell B1 , the second battery cell B and the third battery cell B3 remains unchanged.

FIG. 3 is a functional block diagram of the second embodiment of the autonomously activated electrical energy storage device of the present invention, and the differences between the second embodiment of FIG. 3 and the first embodiment of FIG. 1 will be described later. The temperature detection circuit TD of the autonomously activated electric energy storage device 200 includes a first temperature detector TD1, a second temperature detector TD2 and a third temperature detector TD3, and the first temperature detector TD1, The second temperature detector TD2 and the third temperature detector TD3 are respectively electrically connected to the first battery cell B1, the second battery cell B2 and the third battery cell B3 to detect the first battery cell of the first battery cell B1 respectively temperature, the second cell temperature of the second cell B2, and the third cell temperature of the third cell B3.

The control circuit 1 of the autonomously activated electrical energy storage device 200 includes a first central processing circuit 11 and a second central processing circuit 13. The first central processing circuit 11 is electrically connected to the first temperature detector TD1 and the second temperature detector TD1. The detector TD2 , the third temperature detector TD3 , the first bidirectional charger BEC1 , the second bidirectional charger BEC2 , the third bidirectional charger BEC3 , and the memory 2 . The first central processing circuit 11 obtains the temperature of the first battery cell, the temperature of the second battery cell and the temperature of the third battery cell from the first temperature detector TD1, the second temperature detector TD2 and the third temperature detector TD3, respectively, The temperature of the first battery cell, the temperature of the second battery cell and the temperature of the third battery cell obtained each time are stored in the memory 2 .

The first central processing circuit 11 is connected to the first switch SW1 of the first bidirectional charger BEC1, the second switch SW2 of the second bidirectional charger BEC2, and the third switch SW3 of the third bidirectional charger BEC3, and controls the first switches SW1, The second switch SW2 and the third switch SW3 are switched from the OFF state to the ON state, or are switched from the ON state to the OFF state.

The second central processing circuit 13 is electrically connected to the first central processing circuit 11 and the memory 2 , and the first central processing circuit 11 and the second central processing circuit 13 execute the power transfer program stored in the memory 2 .

The second central processing circuit 13 is also electrically connected to the first voltage detector VD1, the second voltage detector VD2 and the third voltage detector VD3 to obtain the first voltage of the first battery cell B1 and the second battery cell The second voltage of B2 and the third voltage of the third battery cell B3.

When the first central processing circuit 11 obtains the temperature of the first battery cell, the temperature of the second battery cell and the temperature of the third battery cell from the first temperature detector TD1, the second temperature detector TD2 and the third temperature detector TD3 , the first central processing circuit 11 determines whether at least one of the temperature of the first battery core, the temperature of the second battery core and the temperature of the third battery core is equal to or lower than the lower limit of the operating temperature preset by the power transfer program. When the first central processing circuit 11 determines that at least one of the temperature of the first battery core, the temperature of the second battery core and the temperature of the third battery core is equal to or lower than the lower limit of the operating temperature, the first central processing circuit 11 controls the first switches SW1, The second switch SW2 and the third switch SW3 are switched from the off state to the on state and send a command to the second central processing circuit 13 .

When the second central processing circuit 13 reads the instruction from the first central processing circuit 11, the second central processing circuit 13 updates the first voltage setting value of the first battery cell B1 and the voltage of the second battery cell B2 in the power transfer program. The second voltage setting value and the third voltage setting value of the third battery cell B3 are used to control the power transfer between the first battery cell B1 , the second battery cell B2 and the third battery cell B3 .

The second central processing circuit 13 confirms whether the first battery cell B1 , the second battery cell B2 and the third battery cell B3 are respectively through the first voltage detector VD1 , the second voltage detector VD2 and the third voltage detector VD3 The first voltage setting value after the first update, the second voltage setting value after the first update, and the third voltage setting value after the first update are reached. When the second central processing circuit 13 confirms that the first battery cell B1, the second battery cell B2 and the third battery cell B3 reach the first voltage setting value after the first update and the second voltage setting value after the first update, respectively and the third voltage setting value after the first update, the first central processing circuit 11 again determines whether at least one of the temperature of the first battery cell, the temperature of the second battery core and the temperature of the third battery core is equal to or lower than the operating temperature lower limit. When the first central processing circuit 11 determines that at least one of the temperature of the first battery core, the temperature of the second battery core and the temperature of the third battery core is equal to or lower than the lower limit of the operating temperature, the second central processing circuit 13 is instructed to update the first A voltage setting value, a second voltage setting value, and a third voltage setting value.

For example, when the initial voltages of the first battery cell B1, the second battery cell B2 and the third battery cell B3 are in a balanced state, the first central processing circuit 11 determines the temperature of the first battery cell, the temperature of the second battery cell and the Whether at least one of the temperatures of the third battery cells is equal to or lower than the lower operating temperature limit. When the first central processing circuit 11 determines that at least one of the temperature of the first battery core, the temperature of the second battery core and the temperature of the third battery core is equal to or lower than the lower limit of the operating temperature, the first central processing circuit 11 instructs the second central processing circuit 13. The first voltage setting value, the second voltage setting value and the third voltage setting value are updated for the first time, wherein the first voltage setting value, the second voltage setting value and the third voltage setting value updated for the first time are not completely same. When the first battery cell B1, the second battery cell B2 and the third battery cell B3 reach the first updated first voltage setting value, the first updated second voltage setting value and the first updated third voltage respectively When the value is set, the first battery cell B1 , the second battery cell B2 and the third battery cell B3 transition from a balanced state to an unbalanced state.

When the first battery cell B1 , the second battery cell B2 and the third battery cell B3 change from a balanced state to an unbalanced state, the first central processing circuit 11 judges the temperature of the first battery cell, the temperature of the second battery cell and the temperature of the third battery cell again. Whether at least one of the battery cell temperatures is equal to or lower than the lower operating temperature limit. When the first central processing circuit 11 determines that at least one of the temperature of the first battery cell, the temperature of the second battery cell and the temperature of the third battery cell is equal to or lower than the lower limit of the operating temperature, the first central processing circuit 11 again instructs the second central processing The circuit 13 updates the first voltage setting value, the second voltage setting value and the third voltage setting value, wherein the first voltage setting value, the second voltage setting value and the third voltage setting value updated for the second time are completely the same. When the first battery cell B1, the second battery cell B2, and the third battery cell B3 reach the first voltage setting value updated for the second time, the second voltage setting value updated the second time, and the third voltage setting value updated the second time, respectively When the value is set, the first battery cell B1 , the second battery cell B2 and the third battery cell B3 transition from the unbalanced state to the balanced state again.

The above-mentioned number of battery cells and the connection relationship of the bidirectional charger are only examples, and the present invention is not limited thereto. For example, the autonomously activated electrical energy storage device 200 may further include a fourth battery cell, a fifth battery cell, and a sixth battery cell, and the fourth battery cell, the fifth battery cell, and the sixth battery cell are respectively connected with the first battery cell B1, the second battery cell B2 and the third battery cell B3 are connected in parallel. The first temperature detector TD1 is used to detect the temperature of the first battery cell of the first battery cell B1 and the temperature of the fourth battery cell of the fourth battery cell. The second temperature detector TD2 is used to detect the temperature of the second cell of the second cell B2 and the temperature of the fifth cell of the fifth cell. The third temperature detector TD3 is used to detect the temperature of the third cell of the third cell B3 and the temperature of the sixth cell of the sixth cell. The first bidirectional charger BEC1 is coupled to the first battery cell B1 and the fourth battery cell, the second bidirectional charger BEC2 is coupled to the second battery cell B2 and the fifth battery cell, and the third bidirectional charger BEC3 is coupled to The third battery cell and the sixth battery cell.

FIG. 4 is a functional block of a third embodiment of the autonomously activated electrical energy storage device of the present invention. Comparing the third embodiment of FIG. 4 and the second embodiment of FIG. 3 , the difference is that the autonomously activated electric energy storage device 300 of FIG. 4 further includes a wireless communication processing circuit 3 and a hydrogen sensor 4 . The wireless communication processing circuit 3 is electrically connected to the first central processing circuit 11, and the wireless communication processing circuit 3 is used for connecting a remote device R, and the remote device R is, for example, a mobile communication device or a cloud host. In addition to operating automatically according to the power transfer program stored in the memory 2, when the wireless communication processing circuit 3 receives a program update command from the remote device R, the first central processing circuit 11 operates according to the autonomously activated electric energy storage device 300. The program update command is used to update the power transfer program in the memory 2 . For example, update the lower operating temperature limit of the power transfer program and the maximum continuous charging current. In short, the control circuit 1 can be used to update the lower operating temperature limit and/or the maximum continuous charging current according to the instructions of the remote device R.

In addition, the first central processing circuit 11 obtains the temperature of the first battery cell, the temperature of the second battery cell and the temperature of the third battery from the first temperature detector TD1, the second temperature detector TD2 and the third temperature detector TD3 each time After the cell temperature is determined, in addition to storing the temperature of the first cell, the temperature of the second cell and the temperature of the third cell in the memory 2, the temperature of the first cell, the temperature of the second cell are also stored in the wireless communication processing circuit 3. The temperature and the temperature of the third battery cell are transmitted to the remote device R.

The hydrogen detector 4 is electrically connected to the first central processing circuit 11, and the hydrogen detector 4 detects the first hydrogen concentration from the first battery cell B1, the second hydrogen concentration from the second battery core B2, and the third hydrogen concentration from the third battery cell B2. The third hydrogen concentration of battery cell B3. Each time the first central processing circuit 11 obtains the first hydrogen concentration, the second hydrogen concentration and the third hydrogen concentration from the hydrogen detector 19, it stores the first hydrogen concentration, the second hydrogen concentration and the third hydrogen concentration in the memory. In addition to the body 2 , the first hydrogen concentration, the second hydrogen concentration and the third hydrogen concentration are also transmitted to the remote device R through the wireless communication processing circuit 3 .

Since the autonomously activated electric energy storage device 300 is continuously connected with the remote device R, the engineer can monitor the temperature change and hydrogen concentration change of each battery cell at any time, and update the battery cell according to the temperature change and hydrogen concentration change of the battery cell. The power transfer program stored in memory 2.

FIG. 5 is a flow chart of a first embodiment of a control method for an autonomously activated electrical energy storage device of the present invention. As shown in FIG. 5 , in step S501 , the first temperature detector TD1 , the second temperature detector TD2 and the third temperature detector TD3 respectively detect the temperature of the first battery cell and the temperature of the second battery cell B1 . The second battery core temperature of the battery core B2 and the third battery core temperature of the third battery core B3, and then step S503. In detail, the first voltage setting value of the first battery cell B1, the second voltage setting value of the second battery cell B2, and the third voltage setting value of the third battery cell B3 are all the same. When the second battery cell B2 and the third battery cell B3 reach the same voltage setting value respectively, the first battery cell B1 , the second battery cell B2 and the third battery cell B3 are in a balanced state. For example, in a balanced state, the first voltage setting value, the second voltage setting value and the third voltage setting value are 5 volts, 5 volts and 5 volts, respectively.

In step S503, it is determined whether at least one of the temperature of the first battery core, the temperature of the second battery core and the temperature of the third battery core is equal to or lower than the lower limit of the operating temperature. When at least one of the temperature of the first battery core, the temperature of the second battery core, and the temperature of the third battery core is equal to or lower than the lower limit of the operating temperature, step S505 is followed. When the temperature of the first battery core, the temperature of the second battery core, and the temperature of the third battery core are all higher than the lower limit of the working temperature, step S507 is followed.

In step S505, the first voltage setting value of the first battery cell B1, the second voltage setting value of the second battery cell B2, and the third voltage setting value of the third battery cell B3 are updated, so that the updated first voltage setting value is , the second voltage setting value and the third voltage setting value are all different, and then step S509 is followed. In detail, the updated first voltage setting value, second voltage setting value and third voltage setting value are all different, when the first battery cell B1, the second battery cell B2 and the third battery cell B3 reach three At different voltage setting values, the first battery cell B1 , the second battery cell B2 and the third battery cell B3 are in an unbalanced state. For example, in an unbalanced state, the first voltage setting value, the second voltage setting value and the third voltage setting value are 4.5 volts, 4.7 volts and 5.8 volts, respectively.

In step S507, the first bidirectional charger BEC1, the second bidirectional charger BEC2 and the third bidirectional charger BEC3 are respectively in an electrically off state with the first battery cell B1, the second battery cell B2 and the third battery cell B3, Next step S501.

In detail, when the first bidirectional charger BEC1 , the second bidirectional charger BEC2 and the third bidirectional charger BEC3 and the first battery cell B1 , the second battery cell B2 and the third battery cell B3 have been in an electrically off state, respectively When the first bidirectional charger BEC1, the second bidirectional charger BEC2 and the third bidirectional charger BEC3 are maintained in the electrically off state of the first battery cell B1, the second battery cell B2 and the third battery cell B3, respectively. When the first bidirectional charger BEC1 , the second bidirectional charger BEC2 and the third bidirectional charger BEC3 are in electrical conduction with the first battery cell B1 , the second battery cell B2 and the third battery cell B3 respectively, the electrical The on state is switched to the electrical off state.

In step S509, the first bidirectional charger BEC1, the second bidirectional charger BEC2 and the third bidirectional charger BEC3 are respectively in an electrical conduction state with the first battery cell B1, the second battery cell B2 and the third battery cell B3, Next step S511.

Specifically, when the first bidirectional charger BEC1 , the second bidirectional charger BEC2 and the third bidirectional charger BEC3 are in an electrical conduction state with the first battery cell B1 , the second battery cell B2 and the third battery cell B3 respectively When the electrical conduction state of the first bidirectional charger BEC1, the second bidirectional charger BEC2 and the third bidirectional charger BEC3 is maintained with the first battery cell B1, the second battery cell B2 and the third battery cell B3 respectively. When the first bidirectional charger BEC1 , the second bidirectional charger BEC2 and the third bidirectional charger BEC3 are in the electrically off state with the first battery cell B1 , the second battery cell B2 and the third battery cell B3 respectively, the electrical The off state is switched to the electrically on state.

When the first bidirectional charger BEC1 , the second bidirectional charger BEC2 and the third bidirectional charger BEC3 are in electrical conduction state with the first battery cell B1 , the second battery cell B2 and the third battery cell B3 The charge of a battery cell B1 can be transferred to the second battery cell B2 and/or the third battery cell B3, and the charge stored in the second battery cell B2 can be transferred to the first battery cell B1 and/or the third battery cell B3 and stored The charge in the third battery cell B3 can be transferred to the first battery cell B1 and/or the second battery cell B2.

In step S511, the first temperature detector TD1, the second temperature detector TD2 and the third temperature detector TD3 respectively detect the temperature of the first battery cell of the first battery cell B1 and the temperature of the second battery cell of the second battery cell B2. The temperature of the battery core and the temperature of the third battery core of the third battery core B3, and then step S513.

In step S513, it is determined whether at least one of the temperature of the first battery cell, the temperature of the second battery cell, and the temperature of the third battery cell is equal to or lower than the lower limit of the operating temperature. When at least one of the temperature of the first battery core, the temperature of the second battery core and the temperature of the third battery core is equal to or lower than the lower limit of the working temperature, then step S515 is followed. When the temperature of the first battery core, the temperature of the second battery core, and the temperature of the third battery core are all higher than the lower limit of the operating temperature, step S517 is followed.

In step S515, update the first voltage setting value, the second voltage setting value and the third voltage setting value so that the updated first voltage setting value, the second voltage setting value and the third voltage setting value are the same, and then return to the step S501.

In detail, the updated first voltage setting value, the second voltage setting value and the third voltage setting value are all the same, when the first battery cell B1, the second battery cell B2 and the third battery cell B3 reach the updated When the voltage is set, the first battery cell B1 , the second battery cell B2 and the third battery cell B3 are switched from an unbalanced state to a balanced state.

In step S517, the first bidirectional charger BEC1, the second bidirectional charger BEC2 and the third bidirectional charger BEC3 are respectively in an electrically off state with the first battery cell B1, the second battery cell B2 and the third battery cell B3, Next step S511.

FIG. 6 is a flow chart of a second embodiment of the control method for an autonomously activated electrical energy storage device of the present invention. As shown in FIG. 6 , in step S601 , the first temperature detector TD1 , the second temperature detector TD2 and the third temperature detector TD3 detect the temperature of the first battery cell and the temperature of the second battery cell B1 respectively. The second battery core temperature of the battery core B2 and the third battery core temperature of the third battery core B3, and then step S603. In detail, the first voltage setting value of the first battery cell B1, the second voltage setting value of the second battery cell B2, and the third voltage setting value of the third battery cell B3 are all the same. When the second battery cell B2 and the third battery cell B3 reach the same voltage setting value respectively, the first battery cell B1 , the second battery cell B2 and the third battery cell B3 are in a balanced state. For example, in a balanced state, the first voltage setting value, the second voltage setting value and the third voltage setting value are 3.2 volts, 3.2 volts and 3.2 volts, respectively.

In step S603, it is determined whether at least one of the temperature of the first battery core, the temperature of the second battery core and the temperature of the third battery core is equal to or lower than the lower limit of the operating temperature. When at least one of the temperature of the first battery core, the temperature of the second battery core, and the temperature of the third battery core is equal to or lower than the lower limit of the operating temperature, step S605 is followed. When the temperature of the first battery core, the temperature of the second battery core and the temperature of the third battery core are all higher than the lower limit of the working temperature, step S607 is followed.

In step S605, the first voltage setting value of the first battery cell B1, the second voltage setting value of the second battery cell B2, and the third voltage setting value of the third battery cell B3 are updated, so that the updated first voltage setting value , the second voltage setting value and the third voltage setting value are all different, and then step S609 is followed.

In step S607, the first bidirectional charger BEC1, the second bidirectional charger BEC2 and the third bidirectional charger BEC3 are respectively in an electrically off state with the first battery cell B1, the second battery cell B2 and the third battery cell B3, Next step S601.

In step S609, the first bidirectional charger BEC1, the second bidirectional charger BEC2 and the third bidirectional charger BEC3 are respectively in an electrical conduction state with the first battery cell B1, the second battery cell B2 and the third battery cell B3, Next step S611.

In step S611, the first temperature detector TD1, the second temperature detector TD2 and the third temperature detector TD3 respectively detect the temperature of the first battery cell of the first battery cell B1 and the temperature of the second battery cell of the second battery cell B2. The temperature of the battery core and the temperature of the third battery core of the third battery core B3, and then step S613. In detail, when the first battery cell B1, the second battery cell B2 and the third battery cell B3 reach the first voltage setting value, the second voltage setting value and the third voltage setting value updated in step S605, respectively, the first The battery cell B1, the second battery cell B2 and the third battery cell B3 are converted from the balanced state to the first unbalanced state.

In step S613, it is determined whether at least one of the temperature of the first battery core, the temperature of the second battery core, and the temperature of the third battery core is equal to or lower than the lower limit of the operating temperature. When at least one of the temperature of the first battery core, the temperature of the second battery core and the temperature of the third battery core is equal to or lower than the lower limit of the working temperature, then step S615 is followed. When the temperature of the first battery core, the temperature of the second battery core and the temperature of the third battery core are all higher than the lower limit of the working temperature, step S617 is followed.

In step S615, update the first voltage setting value, the second voltage setting value and the third voltage setting value, so that the updated first voltage setting value, the second voltage setting value and the third voltage setting value are all different, and then step S619. In detail, when the first battery cell B1, the second battery cell B2 and the third battery cell B3 reach the first voltage setting value, the second voltage setting value and the third voltage setting value updated in step S615, respectively, the first The battery cell B1, the second battery cell B2 and the third battery cell B3 are converted from the first unbalanced state to the second unbalanced state.

For example, in the first unbalanced state, the first voltage setting value of the first battery cell B1, the second voltage setting value of the second battery cell B2, and the third voltage setting value of the third battery cell B3 are respectively 2.5 volts, 3.5 volts and 3.6 volts. In the second unbalanced state, the first voltage setting value of the first battery cell B1, the second voltage setting value of the second battery cell B2, and the third voltage setting value of the third battery cell B3 are 3.5 volts, 2 volts and 4.1 volts.

In step S617, the first bidirectional charger BEC1, the second bidirectional charger BEC2 and the third bidirectional charger BEC3 are respectively in an electrically off state with the first battery cell B1, the second battery cell B2 and the third battery cell B3, Next step S611.

In step S619, the first bidirectional charger BEC1, the second bidirectional charger BEC2 and the third bidirectional charger BEC3 are respectively in an electrical conduction state with the first battery cell B1, the second battery cell B2 and the third battery cell B3, Next step S611.

In addition, the number of battery cells described in the above embodiments of the autonomously activated electrical energy storage device is only an example, and the present invention is not limited thereto. The number of battery cells included in the autonomously activated electrical energy storage device of the present invention is N, and N is a positive integer greater than 1, and the connection method between the plurality of battery cells is not limited. For example, the number of battery cells is 32, and the connection method is that 16 battery cells are connected in series and are respectively connected in parallel with another 16 battery cells.

In addition, in the aforementioned embodiments of the autonomously activated electrical energy storage device, as long as the temperature of one battery cell is lower than or equal to the lower limit of the operating temperature, the power transfer mechanism will be activated. However, in other embodiments, the average battery cell temperature of all the battery cells can also be used as the mechanism for initiating the power transfer. In other words, when the average cell temperature of the first cell temperature, the second cell temperature and the third cell temperature is lower than or equal to the lower limit of the operating temperature, the power transfer mechanism is activated.

[Advantageous effects of the embodiment]

One of the beneficial effects of the present invention is that, through the autonomously activated electrical energy storage device provided by the present invention, the power transfer between the plurality of battery cells is continuously performed. When power is transferred between multiple battery cells, an energy level change will occur inside each battery cell, and the energy level change will generate kinetic energy. When kinetic energy is generated in each battery cell, the battery cell is switched from a resting state to an activated state. The temperature of the battery cell in the activated state is not easily dropped below the lower limit of the operating temperature due to environmental factors. In this way, even in a low temperature environment, the power of the battery cell will not be quickly lost and the life of the battery cell will not be damaged. In addition, each battery cell is in an active state completely through the continuous transfer of power between the plurality of battery cells, without any external power supply. Based on the law of immortality of energy, no matter how the power is transferred, the total power of all battery cells remains unchanged, and the effect of saving power is also achieved.

The contents disclosed above are only the preferred and feasible embodiments of this creation, and are not intended to limit the scope of the patent application of this creation. Therefore, any equivalent technical changes made by using the descriptions and drawings of this creation are included in the application for this creation. within the scope of the patent.

100: Autonomous activation of electrical energy storage devices 200: Autonomous activation of electrical energy storage devices 300: Autonomous activation of electrical energy storage devices B1: The first battery cell B2: Second battery cell B3: The third battery cell TD: temperature detection circuit TD1: The first temperature detector TD2: Second temperature detector TD3: The third temperature detector BEC1: The first bidirectional charger BC1: The first charging circuit SW1: The first switch BEC2: Second bidirectional charger BC2: Second charging circuit SW2: Second switch BEC3: Third Bidirectional Charger BC3: The third charging circuit SW3: The third switch 1: Control circuit 11: The first central processing circuit 13: The second central processing circuit 2: Memory 3: Wireless communication processing circuit 4: Hydrogen sensor VD1: The first voltage detector VD2: The second voltage detector VD3: The third voltage detector O1: The first output terminal O2: The second output terminal R: remote device VS1: The first voltage setting value VS2: The second voltage setting value VS3: The third voltage setting value VS1’: Adjusted first voltage setting value VS2’: Adjusted second voltage setting value VS3’: Adjusted third voltage setting value S501~S517: Steps S601~S619: Steps

FIG. 1 is a functional block diagram of a first embodiment of an autonomously activated electrical energy storage device of the present invention.

FIG. 2A is a schematic diagram illustrating that the voltages of a plurality of battery cells are in a balanced state.

FIG. 2B is a schematic diagram illustrating that the voltages of a plurality of battery cells are in an unbalanced state.

FIG. 3 is a functional block of the second embodiment of the autonomously activated electrical energy storage device of the present invention.

FIG. 4 is a functional block of a third embodiment of the autonomously activated electrical energy storage device of the present invention.

FIG. 5 is a flow chart of a first embodiment of a control method for an autonomously activated electrical energy storage device of the present invention.

FIG. 6 is a flow chart of a second embodiment of the control method for an autonomously activated electrical energy storage device of the present invention.

100: Autonomous activation of electrical energy storage devices

B1: The first battery cell

B2: Second battery cell

B3: The third battery cell

TD: temperature detection circuit

BEC1: The first bidirectional charger

BC1: The first charging circuit

SW1: The first switch

BEC2: Second bidirectional charger

BC2: Second charging circuit

SW2: Second switch

BEC3: Third Bidirectional Charger

BC3: The third charging circuit

SW3: The third switch

1: Control circuit

2: Memory

VD1: The first voltage detector

VD2: The second voltage detector

VD3: The third voltage detector

Claims (10)

An autonomously activated electrical energy storage device comprising: a first battery cell; a second battery cell; a temperature detection circuit; a first bidirectional charger; a second bidirectional charger; and a control circuit connected to the temperature detection circuit, the first bidirectional charger, the second bidirectional charger, the first battery cell and the second battery cell; Wherein, when the control circuit determines through the temperature detection circuit that at least one of a temperature of a first battery cell of the first battery cell and a temperature of a second battery cell of the second battery cell is equal to or lower than a lower operating temperature limit When the control circuit turns on the first bidirectional charger and the first battery cell and turns on the second bidirectional charger and the second battery cell, through the first bidirectional charger and the second bidirectional charger Controlling the power transfer between the first battery core and the second battery core until the temperature of the first battery core and the temperature of the second battery core are both higher than the lower limit of the working temperature. The autonomously activated electrical energy storage device of claim 1, wherein when a first voltage setting value of the first battery cell is greater than a second voltage setting value of the second battery cell, part of the second battery cell The power is transferred to the first battery cell; when the first voltage setting value is smaller than the second voltage setting value, part of the power of the first battery cell is transferred to the second battery cell. The autonomously activated electrical energy storage device as claimed in claim 1, wherein the first bidirectional charger comprises a first charging circuit and a first switch, the first switch is connected to a first end of the first charging circuit and Between the first battery cells, the second bidirectional charger includes a second charging circuit and a second switch, the second switch is connected between a first end of the second charging circuit and the second battery cell , a second end of the first charging circuit is connected to a second end of the second charging circuit, and the control circuit is connected to the first switch and the second switch to control an off state of the first switch and an on state and an off state and an on state of the second switch. The autonomously activated electrical energy storage device as claimed in claim 1, wherein the temperature detection circuit is electrically connected to the first battery cell or the second battery cell and detects the temperature of the first battery cell and the second battery cell temperature. The autonomously activated electrical energy storage device according to claim 1, wherein the first battery cell and the second battery cell include a first voltage setting value and a second voltage setting value, respectively, and the control circuit includes a first central processing circuit and a second central processing circuit, the first central processing circuit is electrically connected to the first bidirectional charger and the second bidirectional charger, the second central processing circuit is electrically connected to the first battery cell, The second battery cell and the first central processing circuit, when the first central processing circuit determines that at least one of the temperature of the first battery cell and the temperature of the second battery cell is equal to or lower than a lower operating temperature limit, the first A central processing circuit turns on the first bidirectional charger and the first battery cell and turns on the second bidirectional charger and the second battery cell and instructs the second central processing circuit to update the first voltage setting value and the The second voltage setting value is used to control the power transfer between the first battery cell and the second battery cell. The autonomously activated electrical energy storage device as claimed in claim 1, further comprising a first voltage detector and a second voltage detector, the first voltage detector being electrically connected to the control circuit and the first voltage detector a battery cell, and the second voltage detector is electrically connected to the control circuit and the second battery cell. The autonomously activated electrical energy storage device as claimed in claim 6, wherein the control circuit comprises a first central processing circuit and a second central processing circuit, the first central processing circuit is electrically connected to the second central processing circuit, The second central processing circuit is electrically connected to the first battery cell, the first voltage detector, the second battery cell and the second voltage detector. The autonomously activated electrical energy storage device as claimed in claim 1, further comprising a wireless communication processing circuit, the wireless communication processing circuit being electrically connected to the control circuit and used for connecting to a remote device. The autonomously activated electrical energy storage device as claimed in claim 8, wherein the control circuit is configured to update the lower operating temperature limit according to an instruction from the remote device. The autonomously activated electrical energy storage device as claimed in claim 1, further comprising a wireless communication processing circuit and a hydrogen gas detector, the wireless communication processing circuit being electrically connected to the control circuit and used for connecting to a remote device , the hydrogen detector is electrically connected to the control circuit, the hydrogen detector is used to detect a first hydrogen concentration from the first battery cell and a second hydrogen concentration from the second battery cell, the wireless The communication processing circuit is used for transmitting the first hydrogen concentration and the second hydrogen concentration to the remote device.

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