Rapid charging device for charging plurality of battery packs and rapid charging method using same

Abstract

The present invention relates to a rapid charging device for charging a plurality of battery packs and a rapid charging method using same and, more specifically, to a rapid charging device for charging a plurality of battery packs and a rapid charging method using same, the rapid charging device comprising: a plurality of first variable resistance modules respectively connected to correspond to the plurality of battery packs and capable of adjusting resistance; a plurality of second variable resistance modules respectively connected to correspond to the plurality of battery packs and capable of adjusting resistance; a positive high-voltage terminal branched and connected to each of the first variable resistance modules; a negative high-voltage terminal branched and connected to each of the second variable resistance modules; and a control unit connected to each of the first variable resistance modules and the second variable resistance modules and capable of adjusting resistance values of the first variable resistance modules and the second variable resistance modules.

Description

Rapid charging device for charging multiple battery packs and rapid charging method using the same

[0001] This application claims the benefit of priority to Korean Patent Application No. 2024-0109485, filed August 15, 2024, the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to a rapid charging device for charging a plurality of battery packs and a rapid charging method using the same, and more particularly, to a rapid charging device for charging a plurality of battery packs, which can easily perform rapid charging in response to the respective states of the plurality of battery packs, and a rapid charging method using the same.

[0003] Recently, due to the development of alternative energy sources to address air pollution and energy depletion caused by the use of fossil fuels, demand for secondary batteries that can store generated electric energy is increasing.

[0004] Secondary batteries, the energy source for various electronic devices indispensable in modern society, are seeing increased capacity requirements due to the increasing use and complexity of mobile devices and the development of electric vehicles. To meet user demand, small devices are equipped with multiple battery cells. However, automobiles and other devices utilize battery modules, which electrically connect multiple battery cells, or battery packs comprising multiple such modules.

[0005] In the case of electric vehicles, high-capacity battery packs are installed and used, and when these high-capacity battery packs are discharged after use, they are typically recharged using a rapid charger and used again.

[0006] Because these high-capacity battery packs have large capacities, they require a long time to fully charge at the charging speeds used in typical smartphones, and thus, to reduce the charging time, they are charged using a rapid charger.

[0007] When performing rapid charging using such rapid chargers, high temperatures are generated in the battery pack, which may cause problems such as reduced performance of the battery pack and reduced charging efficiency.

[0008] Fig. 1 is a block diagram illustrating a charging device of a charging system according to the prior art. As illustrated in Fig. 1, the battery pack charging system according to the prior art includes a variable charging voltage and a variable charging current, and is a system in which a battery pack (10) is electrically connected to the variable charging voltage and the variable charging current to charge.

[0009] The battery pack charging system according to this prior art controls the temperature of the battery pack (10) by adjusting the supplied current and voltage to prevent heat from being generated in the battery pack (10) when rapidly charging the battery pack (10) and to prevent the heat from being generated above a standard level to the extent that it affects the charging efficiency.

[0010] However, since these conventional technologies reduce the heat generated during charging by controlling the current and voltage and wait for the temperature to drop, it is not easy to immediately control the temperature of the battery pack to reach an appropriate temperature or within an appropriate temperature range.

[0011] In addition, this temperature control also has the problem that the temperature gradually decreases after rising above the appropriate temperature, and in such cases, the performance of the battery pack deteriorates and the battery pack charging efficiency decreases due to the high temperature.

[0012] (Prior art literature)

[0013] (Patent Document 1) Korean Patent Publication No. 2023-0166599

[0014] In order to solve the above problems, the present invention provides a rapid charging device for charging a plurality of battery packs, which can control the heat generated in the battery pack during rapid charging to perform rapid charging at an appropriate temperature and prevent degradation of battery pack performance and battery pack charging efficiency between charges, and a rapid charging method using the same.

[0015] In order to achieve the above object, the rapid charging device according to the present invention is characterized by including a plurality of first variable resistance modules (100) which are connected to correspond to each of the plurality of battery packs (P1, P2, P3) and are capable of adjusting resistance, a plurality of second variable resistance modules (200) which are connected to correspond to each of the plurality of battery packs (P1, P2, P3) and are capable of adjusting resistance, a positive (+) high voltage terminal (300) which is branched and connected to each of the first variable resistance modules (100), a negative (-) high voltage terminal (400) which is branched and connected to each of the second variable resistance modules (200), and a control unit (500) which is connected to each of the first variable resistance modules (100) and the second variable resistance modules (200) and is capable of adjusting the resistance values ​​of the first variable resistance module (100) and the second variable resistance module (200).

[0016] In addition, in the rapid charging device according to the present invention, the control unit (500) is characterized in that it is equipped with a plurality of temperature measurement sensors (510) capable of measuring the temperature of each of the plurality of battery packs (P1, P2, P3).

[0017] In addition, in the rapid charging device according to the present invention, the control unit (500) is characterized in that it is provided with a plurality of temperature control units (520) capable of controlling the temperature of each of the plurality of battery packs (P1, P2, P3).

[0018] In addition, in the rapid charging device according to the present invention, the temperature control unit (520) is characterized by being equipped with a heating and cooling function.

[0019] In addition, in the rapid charging device according to the present invention, the plurality of battery packs (P1, P2, P3) are characterized in that they are charged through a charging transient state and a charging normal state up to a target temperature.

[0020] In addition, in the rapid charging device according to the present invention, the temperature control in the charging transient state is characterized by fixing the resistance value of the first variable resistance module (100) and / or the second variable resistance module (200) and controlling the temperature of the battery pack with the temperature control unit (520).

[0021] In addition, in the rapid charging device according to the present invention, the temperature control in the normal charging state is characterized by controlling the temperature of the battery pack by the resistance values ​​of the first variable resistance module (100) and the second variable resistance module (200) and / or the temperature control unit (520).

[0022] In addition, in the rapid charging device according to the present invention, the temperature control unit (520) in the charging transient state is characterized in that the heating and cooling functions are individually operated and stopped according to the temperature change rate (dT / dt) over time of the plurality of battery packs (P1, P2, P3).

[0023] In addition, in the rapid charging device according to the present invention, the temperature control of the battery pack in the normal charging state is characterized by controlling the temperature of the battery pack based on the resistance values ​​of the first variable resistance module (100) and the second variable resistance module (200) and / or the predicted temperature value generated from a recursive filter using the past temperature value and the current temperature value of the battery pack over time by the temperature control unit (520) and the allowable temperature range of the target temperature.

[0024] In addition, in the rapid charging device according to the present invention, if the current temperature value is within the allowable temperature range, the temperature of the battery pack is controlled by adjusting the resistance values ​​of the first variable resistance module (100) and the second variable resistance module (200) based on the predicted temperature value, and if the current temperature value is outside the allowable temperature range, the temperature of the battery pack is controlled by adjusting the resistance value and / or the temperature control unit.

[0025] In addition, in the rapid charging device according to the present invention, the temperature control unit (520) is characterized in that the heating and cooling functions are operated and stopped by predicting the temperature change of the battery pack (P1, P2, P3) over time based on at least one of the external temperature, C-rate, and SOC status.

[0026] In addition, a rapid charging method of a battery pack according to the present invention is characterized by including a first step of measuring at least one sensing information among temperature, ambient temperature, C-rate, and SOC status of each of a plurality of battery packs, a second step of charging the battery pack by controlling at least one of a first variable resistance module, a second variable resistance module, and a temperature control unit according to the sensing information, a third step of maintaining the temperature of the plurality of battery packs within an allowable temperature range, and a fourth step of terminating charging when charging of the plurality of battery packs is completed.

[0027] In addition, in the rapid charging method of a battery pack according to the present invention, the plurality of battery packs (P1, P2, P3) are characterized in that they are charged through a charging transient state and a charging steady state up to the target temperature.

[0028] In addition, in the rapid charging method of a battery pack according to the present invention, the temperature control in the charging transient state is characterized by fixing the resistance value of the first variable resistance module (100) and / or the second variable resistance module (200) and controlling the temperature of the battery pack with the temperature control unit (520).

[0029] In addition, in the rapid charging method of a battery pack according to the present invention, the temperature control in the normal charging state is characterized by controlling the temperature of the battery pack by the resistance values ​​of the first variable resistance module (100) and the second variable resistance module (200) and / or the temperature control unit (520).

[0030] In addition, in the rapid charging method of the battery pack according to the present invention, the temperature control of the battery pack in the normal charging state is characterized by controlling the temperature of the battery pack based on the resistance values ​​of the first variable resistance module (100) and the second variable resistance module (200) and / or the predicted temperature value generated from a recursive filter using the past temperature value and the current temperature value of the battery pack over time by the temperature control unit (520) and the allowable temperature range of the target temperature.

[0031] As described above, the rapid charging device for charging a plurality of battery packs according to the present invention and the rapid charging method using the same have the advantage of maintaining battery pack charging efficiency by charging the battery pack within the allowable temperature range of the target temperature when charging the battery pack using a variable resistance module and a temperature control unit.

[0032] In addition, the rapid charging device for charging a plurality of battery packs according to the present invention and the rapid charging method using the same have the advantage of being able to prevent performance degradation of the battery pack due to high temperature by cooling it by a variable resistance module and a temperature control unit when the temperature of the battery pack rises and goes beyond the allowable temperature range.

[0033] Fig. 1 is a block diagram showing a charging device of a charging system according to the prior art.

[0034] Figure 2 is a schematic diagram showing a rapid charging device according to an embodiment of the present invention.

[0035] Figure 3 is a graph showing the temperature change of a battery pack over time when using a rapid charging device according to an embodiment of the present invention.

[0036] Figure 4 is a flowchart showing a rapid charging method for charging a battery pack according to an embodiment of the present invention.

[0037] Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail, so that those skilled in the art can easily implement the present invention. However, when describing the operating principles of preferred embodiments of the present invention in detail, if it is determined that a detailed description of related known functions or configurations may unnecessarily obscure the gist of the present invention, such detailed descriptions will be omitted.

[0038] Additionally, the same drawing reference numerals are used for parts with similar functions and actions throughout the drawings. Throughout the specification, when a part is said to be connected to another part, this includes not only direct connections but also indirect connections with other elements intervening. Furthermore, inclusion of a component does not exclude other components unless specifically stated otherwise, but rather implies the inclusion of additional components.

[0039] Hereinafter, a rapid charging device for charging a plurality of battery packs according to the present invention and a rapid charging method using the same will be described with reference to the attached drawings.

[0040] FIG. 2 is a schematic diagram showing a rapid charging device according to an embodiment of the present invention, and FIG. 3 is a graph showing temperature changes in a battery pack over time when using a rapid charging device according to an embodiment of the present invention.

[0041] Referring to FIGS. 2 and 3, a rapid charging device according to a preferred embodiment of the present invention is configured to include a first variable resistance module (100), a second variable resistance module (200), a positive (+) high voltage terminal (300), a negative (-) high voltage terminal (400), and a control unit (500).

[0042] The first variable resistance module (100) has a battery pack (P1, P2, P3) connected to one side and a positive (+) high voltage terminal (300) connected to the other side, and is provided in the same number as the plurality of battery packs (P1, P2, P3) to correspond to each of the plurality of battery packs (P1, P2, P3) to be charged.

[0043] The battery pack (P1, P2, P3) includes a plurality of battery cells connected in series, parallel, or series-parallel. The battery cell (11) may be, for example, a lithium ion battery cell, and the type of battery cell is not particularly limited as long as it is capable of repeated charging and discharging.

[0044] The first variable resistance module (100) controls the resistance of the current formed by the voltage supplied from the positive (+) high voltage terminal (300) connected to the other side so that a desired current value flows.

[0045] In addition, a first variable resistance module (100) is provided to correspond to each battery pack (P1, P2, P3), so that the current value flowing to the battery pack (P1, P2, P3) can be individually set by setting the resistance value.

[0046] The second variable resistance module (200) has a battery pack (P1, P2, P3) connected to one side and a negative (-) high voltage terminal (400) connected to the other side, and is provided in the same number as the plurality of battery packs (P1, P2, P3) to correspond to each of the plurality of battery packs (P1, P2, P3) to be charged.

[0047] The second variable resistance module (200) controls the resistance of the current formed by the voltage supplied from the negative (-) high voltage terminal (400) connected to the other side so that a desired current value flows.

[0048] In addition, a second variable resistance module (200) is provided to correspond to each battery pack (P1, P2, P3), so that the current value flowing to the battery pack (P1, P2, P3) can be individually set by setting the resistance value similarly to the first variable resistance module (100).

[0049] Here, the first variable resistance module (100) and the second variable resistance module (200) adjust the resistance value by changing the cross-sectional area of ​​the conductor through which current flows and changing the material of the conductor, and there is no particular limitation as long as the resistance value can be adjusted.

[0050] The positive (+) pole high voltage terminal (300) is connected to the battery pack (P1, P2, P3) through the first variable resistance module (100) to supply voltage, thereby rapidly charging the battery pack (P1, P2, P3).

[0051] The positive (+) pole high voltage terminal (300) is structured so that wires are branched and connected to each of a plurality of first variable resistance modules (100) to supply a constant voltage and rapidly charge the battery packs (P1, P2, P3).

[0052] The negative (-) high voltage terminal (400) is connected to the battery pack (P1, P2, P3) through the second variable resistance module (200) to supply voltage, thereby rapidly charging the battery pack (P1, P2, P3).

[0053] The negative (-) high voltage terminal (400) is structured so that wires are branched and connected to each of a plurality of second variable resistance modules (200), thereby supplying a constant voltage to rapidly charge the battery packs (P1, P2, P3).

[0054] At this time, the means for charging the battery pack (P1, P2, P3) is composed of a positive (+) high voltage terminal (300) and a negative (-) high voltage terminal (400), so that parallel control is easy during charging, and when a high voltage terminal on one side breaks down, there is an advantage in that damage caused by a breakdown can be reduced because a high voltage terminal is provided on the other side.

[0055] Next, the control unit (500) is configured to control the charging status of the rapid charging device, temperature control of the battery pack (P1, P2, P3), and charging speed control, and includes a temperature measurement sensor (510) and a temperature control unit (520).

[0056] The control unit (500) is connected to a plurality of first variable resistance modules (100) and a plurality of second variable resistance modules (200), respectively, and can adjust the resistance values ​​of the first variable resistance modules (100) and the second variable resistance modules (200), and can set the resistance values ​​of each variable resistance module differently.

[0057] The control unit (500) can measure the real-time temperature of the battery packs (P1, P2, P3) through the temperature measurement sensor (510), and a temperature measurement sensor (510) is provided corresponding to each battery pack (P1, P2, P3) to measure the temperature of each battery pack (P1, P2, P3).

[0058] Here, the temperature measurement sensor (510) may be an attached sensor that is closely attached to and attached to each battery pack (P1, P2, P3) as illustrated in FIG. 2, and may be a measurement sensor using an infrared camera, and is not particularly limited as long as it can measure the temperature of each battery pack (P1, P2, P3).

[0059] The temperature control unit (520) of the control unit (500) has heating and cooling functions and is positioned to be attached to each of a plurality of battery packs (P1, P2, P3) to control the temperature of the battery packs (P1, P2, P3).

[0060] The temperature control unit (520) may be, for example, pad-shaped as shown in FIG. 2, and may be provided with heating and cooling functions so as to control the temperature of the battery pack (P1, P2, P3), and may have a wrapping pocket shape, etc., without any particular limitations.

[0061] When controlling the temperature of the battery pack (P1, P2, P3) by the heating and cooling function of the temperature control unit (520), the temperature control unit (520) can be operated and stopped by predicting the temperature change of the battery pack (P1, P2, P3) over time through a recursive filter based on at least one of the external temperature, C-rate, and SOC status.

[0062] This temperature control unit (520) is equipped with heating and cooling functions, so that even when a problem occurs in the first variable resistance module (100) and the second variable resistance module (200) and the resistance value cannot be adjusted, making it difficult to control the temperature of the battery pack (P1, P2, P3), there is an advantage in that the temperature of the battery pack (P1, P2, P3) can be controlled through the heating and cooling functions.

[0063] The control unit (500) controls the charging process so that the battery packs (P1, P2, P3) can reach the target temperature based on the current temperature values ​​of the battery packs (P1, P2, P3) sensed through the temperature measurement sensor (510).

[0064] At this time, the target temperature is 60℃ at which the charging efficiency of the battery pack (P1, P2, P3) is high, and the allowable temperature range is ±3℃ of the target temperature. This is because if the temperature of the battery pack (P1, P2, P3) is lower than the allowable temperature range, the rapid charging efficiency may decrease, and if the temperature of the battery pack (P1, P2, P3) is higher than the allowable temperature range, the rapid charging efficiency may decrease and the performance of the battery pack (P1, P2, P3) may deteriorate.

[0065] By means of the control unit (500), a plurality of battery packs (P1, P2, P3) are charged through a charging transient state and a charging normal state to a target temperature. The charging transient state means a charging state in which the temperature of the battery packs (P1, P2, P3) is outside the allowable temperature range, and the charging normal state means a charging state in which the temperature of the battery packs (P1, P2, P3) is within the allowable temperature range.

[0066] The control unit (500) controls the temperature of the battery pack (P1, P2, P3) by fixing the resistance value of the first variable resistance module (100) and / or the second variable resistance module (200) in a charging transient state and controlling the temperature of the battery pack (P1, P2, P3) with the temperature control unit (520).

[0067] More specifically, when the temperature of the battery pack (P1, P2, P3) is lower than the allowable temperature range in a state of overcharge, the control unit (500) fixes the resistance value of the first variable resistance module (100) and / or the second variable resistance module (200) and heats the battery pack (P1, P2, P3) using the heating function of the temperature control unit (520) to control the temperature of the battery pack (P1, P2, P3) to be within the allowable temperature range.

[0068] In addition, when the temperature of the battery pack (P1, P2, P3) is higher than the allowable temperature range in a state of overcharge, the control unit (500) fixes the resistance value of the first variable resistance module (100) and / or the second variable resistance module (200) and cools the battery pack (P1, P2, P3) using the cooling function of the temperature control unit (520) to control the temperature of the battery pack (P1, P2, P3) to be within the allowable temperature range.

[0069] In addition, in a charging transient state, the temperature control unit (520) can individually operate and stop the heating and cooling functions for the plurality of battery packs (P1, P2, P3) according to the temperature change rate (dT / dt) over time of the plurality of battery packs (P1, P2, P3), so that there is an advantage in that it can respond according to each battery pack (P1, P2, P3).

[0070] Temperature control in the normal charging state adjusts the resistance values ​​of the first variable resistance module (100) and the second variable resistance module (200), and controls the temperature of the battery pack (P1, P2, P3) through the heating and cooling functions of the temperature control unit (520).

[0071] At this time, in the normal charging state, the resistance values ​​of the first variable resistance module (100) and the second variable resistance module (200) and / or the temperature control unit (520) can be used to control the temperature of the battery pack (P1, P2, P3), and / or the temperature can be controlled through changes in the temperature value sensed by the temperature measurement sensor (510).

[0072] In more detail, the temperature of the battery pack (P1, P2, P3) can be controlled by adjusting the resistance values ​​of the first variable resistance module (100) and the second variable resistance module (200) so that the temperature can be controlled based on the allowable temperature range of 60±3℃ of the target temperature using the predicted temperature values ​​generated from the recursive filter using the past temperature values ​​and the current temperature values ​​of the battery pack (P1, P2, P3) measured by the temperature measurement sensor (510), and by operating and stopping the heating and cooling functions of the temperature control unit (520).

[0073] If the current temperature value measured by the temperature measurement sensor (510) is within the allowable temperature range, the resistance values ​​of the first variable resistance module (100) and the second variable resistance module (200) are adjusted based on the predicted temperature value, and the current value is adjusted accordingly to control the temperature of the battery pack (P1, P2, P3).

[0074] In addition, if the current temperature value measured by the temperature measurement sensor (510) is outside the allowable temperature range, temperature control can be performed using resistance value adjustment and / or heating and cooling functions of the temperature control unit (520).

[0075] Referring to FIG. 3, an embodiment of the present invention will be described. When the current temperature value of the battery pack (P1, P2, P3) measured by the temperature measurement sensor (510) is within the allowable temperature range, the resistance values ​​of the first variable resistance module (100) and the second variable resistance module (200) are adjusted so that the current temperature value converges to the target temperature of 60°C.

[0076] In more detail, when the current temperature value is greater than 60℃ and less than 63℃, the resistance value of the first variable resistance module (100) and / or the second variable resistance module (200) is increased to lower the current value, thereby inducing a temperature drop accordingly, so that the temperature converges to the target temperature of 60℃.

[0077] In addition, when the current temperature value is 57℃ or higher and less than 60℃, the resistance value of the first variable resistance module (100) and / or the second variable resistance module (200) is reduced to increase the current value and induce a temperature increase accordingly, thereby converging to the target temperature of 60℃.

[0078] Meanwhile, when the current temperature value of the battery pack (P1, P2, P3) exceeds 63℃ and is out of the allowable temperature range, the resistance value of the first variable resistance module (100) and / or the second variable resistance module (200) is increased to lower the current value, and the cooling function of the temperature control unit (520) is operated so that the current temperature value is within the allowable temperature range.

[0079] At this time, the resistance value of the first variable resistance module (100) and / or the second variable resistance module (200) and the cooling function operation setting value of the temperature control unit (520) are set based on the predicted temperature value applied to the recursive filter based on the past temperature value and the current temperature value.

[0080] Figure 4 is a flowchart showing a rapid charging method for charging a battery pack according to an embodiment of the present invention.

[0081] Referring to FIG. 4, a method for rapidly charging a plurality of battery packs using a rapid charging device according to a preferred embodiment of the present invention comprises a first step of measuring at least one sensing information among temperature, ambient temperature, C-rate, and SOC status of each of the plurality of battery packs, a second step of charging the battery pack by controlling at least one of a first variable resistance module, a second variable resistance module, and a temperature control unit according to the sensing information, a third step of maintaining the temperature of the plurality of battery packs within an allowable temperature range, and a fourth step of terminating charging when charging of the plurality of battery packs is completed.

[0082] First, the first step of measuring at least one sensing information among the temperature, the outside temperature, the C-rate, and the SOC status of each of the plurality of battery packs is a step of measuring at least one sensing information among the temperature, the outside temperature, the C-rate, and the SOC status of each of the plurality of battery packs using a control unit.

[0083] The control unit determines whether temperature control of the battery pack is necessary based on the above sensing information.

[0084] The second step of charging the battery pack by controlling at least one of the first variable resistance module, the second variable resistance module, and the temperature control unit based on sensing information is a step of controlling at least one of the first variable resistance module, the second variable resistance module, and the temperature control unit based on whether temperature control is necessary as determined in the first step, thereby allowing charging of the battery pack to be performed at a target temperature.

[0085] At this time, the battery pack of the cover is charged through a charging transient state and a charging normal state up to the target temperature. As described above, the charging transient state means a charging state in which the temperature of the battery pack (P1, P2, P3) is outside the allowable temperature range, and the charging normal state means a charging state in which the temperature of the battery pack (P1, P2, P3) is within the allowable temperature range.

[0086] Based on the sensing information, in the case of a charging transient state, the temperature control fixes the resistance value of the first variable resistance module and / or the second variable resistance module and controls the temperature of the battery pack with the heating and cooling functions of the temperature control unit.

[0087] Of course, it is also possible to control the temperature of the battery pack using a temperature control unit while adjusting the resistance values ​​of the first variable resistance module and the second variable resistance module as needed.

[0088] For example, when the battery pack is in an overcharge state and the temperature of the battery pack is lower than the allowable temperature range, the resistance values ​​of the first variable resistance module and the second variable resistance module can be fixed and the heating function of the temperature control unit can be operated to control the temperature of the battery pack so that it is within the allowable temperature range.

[0089] At this time, it is also possible to increase the current value supplied to the battery pack by lowering the resistance values ​​of the first variable resistance module and the second variable resistance module, thereby increasing the heat generated by charging in the battery pack so that the temperature of the battery pack is within the allowable temperature range.

[0090] Here, the target temperature at which the charging efficiency of the battery pack can be maintained at its best is 60℃, and the allowable temperature range is 60±3℃, which can suppress the deterioration of the battery pack performance while maintaining relatively stable battery pack charging efficiency.

[0091] The third step of maintaining the temperature of multiple battery packs within the allowable temperature range is a step of continuously performing rapid charging of the battery packs in a normal charging state, and controlling the temperature of the battery packs by the resistance values ​​of the first variable resistance module and the second variable resistance module and / or the temperature control unit so that the temperature of the battery packs can be maintained within the allowable temperature range.

[0092] In order to maintain the temperature of the battery pack within the allowable temperature range in a normal charging state, the predicted temperature value generated from a recursive filter using the past temperature values ​​and current temperature values ​​of the battery pack over time is controlled by the resistance values ​​of the first variable resistance module and the second variable resistance module and / or the heating and cooling functions of the temperature control unit so that the predicted temperature value can be maintained within the allowable temperature range of the target temperature.

[0093] Anyone with ordinary skill in the art to which the present invention pertains will be able to perform various applications and modifications within the scope of the present invention based on the above contents.

[0094] (Explanation of symbols)

[0095] 100: 1st variable resistance module

[0096] 200: Second variable resistance module

[0097] 300: Positive (+) high voltage terminal

[0098] 400: Negative (-) high voltage terminal

[0099] 500: Control Unit

[0100] 510: Temperature measurement sensor

[0101] 520: Temperature control unit

[0102] P1, P2, P3: Battery packs

Claims

1. A rapid charging device for charging multiple battery packs, A plurality of first variable resistance modules connected to correspond to each of the plurality of battery packs and capable of adjusting resistance; A plurality of second variable resistance modules connected to correspond to each of the plurality of battery packs and capable of adjusting resistance; A positive high voltage terminal branched and connected to each of the above first variable resistance modules; A negative high voltage terminal branched and connected to each of the second variable resistance modules; A rapid charging device comprising a control unit connected to each of the first variable resistance module and the second variable resistance module and capable of adjusting the resistance values ​​of the first variable resistance module and the second variable resistance module.

2. In paragraph 1, The above control unit is a rapid charging device equipped with a plurality of temperature measurement sensors capable of measuring the temperature of each of the plurality of battery packs.

3. In paragraph 2, The above control unit is a rapid charging device equipped with a plurality of temperature control units capable of controlling the temperature of each of the plurality of battery packs.

4. In paragraph 3, The above temperature control unit is a rapid charging device equipped with heating and cooling functions.

5. In paragraph 4 The above-mentioned multiple battery packs are a rapid charging device that charges through a charging transient state and a charging normal state up to a target temperature.

6. In paragraph 5, A rapid charging device in which the temperature control in the above charging transient state is performed by fixing the resistance value of the first variable resistance module and / or the second variable resistance module and controlling the temperature of the battery pack with the temperature control unit.

7. In paragraph 5, A rapid charging device that controls the temperature of the battery pack by the resistance values ​​of the first variable resistance module and the second variable resistance module and / or the temperature control unit in the above charging normal state.

8. In paragraph 6, The temperature control unit in the above charging transient state is a rapid charging device in which the heating and cooling functions are individually operated and stopped according to the temperature change rate (dT / dt) over time of the plurality of battery packs.

9. In paragraph 7, A rapid charging device that controls the temperature of the battery pack in the above charging normal state based on the resistance values ​​of the first variable resistance module and the second variable resistance module and / or the predicted temperature value generated from a recursive filter using the past temperature value and the current temperature value of the battery pack over time by the temperature control unit and the allowable temperature range of the target temperature.

10. In paragraph 9, If the current temperature value is within the allowable temperature range, the temperature of the battery pack is controlled by adjusting the resistance values ​​of the first variable resistance module and the second variable resistance module based on the predicted temperature value. A rapid charging device that controls the temperature of the battery pack by adjusting the resistance value and / or the temperature control unit when the current temperature value is outside the allowable temperature range.

11. In paragraph 7, The above temperature control unit is a rapid charging device that operates and stops the heating and cooling functions by predicting the temperature change of the battery pack over time based on at least one of the external temperature, C-rate, and SOC status.

12. A rapid charging method for charging multiple battery packs using a rapid charging device. A first step of measuring at least one sensing information among temperature, ambient temperature, C-rate, and SOC status of each of a plurality of battery packs; A second step of charging the battery pack by controlling at least one of the first variable resistance module, the second variable resistance module, and the temperature control unit according to the sensing information; A third step of maintaining the temperature of the plurality of battery packs within an allowable temperature range; and A rapid charging method for a battery pack, comprising a fourth step of terminating charging when the charging of the plurality of battery packs is completed.

13. In paragraph 12, A rapid charging method for a battery pack in which the above plurality of battery packs are charged through a charging transient state and a charging normal state up to the target temperature.

14. In paragraph 13, A rapid charging method for a battery pack in which the temperature control in the above charging transient state is performed by fixing the resistance value of the first variable resistance module and / or the second variable resistance module and controlling the temperature of the battery pack with the temperature control unit.

15. In paragraph 13, A rapid charging method for a battery pack in which temperature control in the above charging normal state is performed by controlling the temperature of the battery pack by the resistance values ​​of the first variable resistance module and the second variable resistance module and / or the temperature control unit.

16. In paragraph 15, A rapid charging method for a battery pack, wherein the temperature control of the battery pack in the above charging normal state is performed based on the resistance values ​​of the first variable resistance module and the second variable resistance module and / or the predicted temperature value generated from a recursive filter using the past temperature value and the current temperature value of the battery pack over time by the temperature control unit and the allowable temperature range of the target temperature.

Images