Battery management system device and control method thereof

Abstract

The present invention discloses a battery management system device and a control method thereof, wherein the battery management system device includes: a measuring unit, which measures the temperature, remaining power and voltage of a battery; a first calculating unit, which uses the temperature, remaining power and voltage of the battery measured by the measuring unit during a predetermined time period to calculate the temperature change of each charging amount of the battery temperature for the remaining power or voltage of the battery; a second calculating unit, which calculates the predicted temperature of the battery cell when the remaining power of the battery is charged to a first reference value based on the temperature, remaining power and trend of the battery; and a control unit, which controls a first charging current based on the battery temperature calculated by the second calculating unit and a preset first reference temperature, and charges the battery using the first charging current, so that the present invention can provide a battery management device for suppressing battery cell degradation when the battery is quickly charged.

Description

Technical Field

[0001] The present invention relates to a battery management system (BMS) device and a control method thereof. Background Art

[0002] As demand for electric vehicles rapidly increases, so does consumer demand for improved convenience. In particular, rapid charging technologies are being actively developed to shorten the charging time of secondary batteries in electric vehicles. However, in electric vehicles requiring high energy density, the high currents applied during rapid charging can significantly impact the degradation of battery cells due to the heat generated during this process.

[0003] To prevent cell degradation caused by the heat generated during rapid charging of these secondary batteries, existing rapid charging technologies simply measure the battery's temperature and control the battery's charging current by comparing the measured temperature with a reference value. However, changes in secondary battery temperature are subject to a time delay. Therefore, when the battery's temperature exceeds the reference value, even if the charging current is reduced, the battery's temperature will reach a level that affects the battery cells, thus affecting cell degradation. Furthermore, lowering the reference temperature to control the battery's charging current to prevent this problem does not necessarily reduce the battery's charging speed.

[0004] On the other hand, Korean Patent Gazette No. 10-1249347, “Secondary battery with temperature measuring pad attached and protection device thereof” (Patent Document 1), discloses a secondary battery protection device that takes into account the linear change of the secondary battery temperature. Patent Document 1 discloses a secondary battery and a protection device thereof that cuts off the flow of current when the rate of change of the temperature measurement value based on the previous moment and the current moment is above a critical value. Patent Document 1 cuts off the flow of current based on the rate of change of the temperature measurement value when an abnormality such as overcurrent occurs in the secondary battery, thereby preventing the occurrence of safety accidents such as fire or explosion caused by the secondary battery. However, since Patent Document 1 only cuts off the current by controlling the switch when the rate of change of the temperature measurement value is above the critical value, it is not possible to perform fast charging that shortens the charging speed of the secondary battery.

[0005] Prior art literature

[0006] (Patent Document 1) Korean Patent Publication No. 10-1249347 (“Secondary battery with attached temperature measuring pad and protective device thereof”, published on April 1, 2013) Summary of the Invention

[0007] (1) Technical issues to be resolved

[0008] The present invention is proposed to solve the above-mentioned problems. According to the BMS device and the control method thereof of the present invention, the battery cell degradation during rapid charging of a secondary battery requiring a high charging current can be suppressed by operating within the optimal charging temperature range.

[0009] In addition, according to the BMS device and the control method thereof of the present invention, degradation of battery cells caused by high temperature exposure is minimized, thereby improving the life stability of battery cells and modules.

[0010] (2) Technical solution

[0011] The BMS device of the present invention for solving the above-mentioned problems includes: a measuring unit for measuring or estimating the temperature, remaining power, voltage and charging current of a battery; a first calculating unit for calculating the temperature change of each charging amount of the battery with respect to the remaining power or voltage of the battery based on the temperature, remaining power and voltage of the battery measured by the measuring unit at different times; a second calculating unit for calculating the predicted temperature of the battery when the remaining power of the battery is charged to a first reference value based on the temperature, remaining power and temperature change of each charging amount of the battery; and a control unit for controlling a first charging current based on information comparing the predicted temperature calculated by the second calculating unit with a preset first reference temperature, and charging the battery using the first charging current.

[0012] Furthermore, the present invention is characterized in that the control unit increases the first charging current when the predicted temperature is lower than the first reference temperature, and decreases the first charging current when the predicted temperature is higher than the first reference temperature.

[0013] In addition, the present invention is characterized in that the first calculation unit calculates the temperature change of each charging amount based on the first remaining power, the second remaining power, the first temperature and the second temperature, the first remaining power is the remaining power of the battery measured at a first moment, the second remaining power is the remaining power of the battery measured at a second moment different from the first moment, the first temperature is the temperature of the battery measured at the first moment, and the second temperature is the temperature of the battery measured at the second moment.

[0014] Furthermore, the present invention is characterized in that when the temperature of the battery measured by the measuring unit exceeds the first reference temperature, the control unit charges the battery using a second charging current that is less than the first charging current as the charging current of the battery.

[0015] Furthermore, the present invention is characterized in that when the remaining charge of the battery measured by the measuring unit exceeds the first reference value, the control unit charges the battery using a third charging current different from the first charging current as the charging current of the battery.

[0016] On the other hand, the control method of the BMS device of the present invention includes: a measuring step of measuring or estimating the temperature, remaining power, voltage and charging current of a battery; a first calculation step of calculating the temperature change of each charging amount of the battery with respect to the remaining power or voltage of the battery based on the temperature, remaining power and voltage of the battery measured at different times in the measuring step; a second calculation step of calculating the predicted temperature of the battery when the remaining power of the battery is charged to a first reference value based on the temperature, remaining power and temperature change of each charging amount of the battery; and a control step of controlling a first charging current based on information comparing the predicted temperature calculated in the second calculation step with a preset first reference temperature, and charging the battery using the first charging current.

[0017] Furthermore, the present invention is characterized in that, in the control step, the first charging current is increased when the predicted temperature is lower than the first reference temperature, and the first charging current is decreased when the predicted temperature is higher than the first reference temperature.

[0018] In addition, the present invention is characterized in that, in the first calculation step, the temperature change of each charging amount is calculated based on the first remaining power, the second remaining power, the first temperature and the second temperature, the first remaining power is the remaining power of the battery measured at a first moment, the second remaining power is the remaining power of the battery measured at a second moment different from the first moment, the first temperature is the temperature of the battery measured at the first moment, and the second temperature is the temperature of the battery measured at the second moment.

[0019] Furthermore, the present invention is characterized in that in the controlling step, when the temperature of the battery measured in the measuring step exceeds the first reference temperature, the battery is charged using a second charging current less than the first charging current as the charging current of the battery.

[0020] In addition, the present invention is characterized in that, in the control step, when the remaining power of the battery measured in the measurement step exceeds the first reference value, a third charging current different from the first charging current is used as the charging current of the battery to charge the battery.

[0021] (3) Beneficial effects

[0022] According to the BMS device and control method thereof of various embodiments of the present invention as described above, a relationship between the battery temperature and the remaining battery capacity (SOC) is approximated, and a charging current for the battery that meets the remaining battery capacity and battery temperature required by the user is calculated based on the relationship, so that the battery is charged with the charging current, thereby suppressing the degradation of the battery cell while performing rapid charging of the secondary battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a block diagram of a BMS device according to the present invention.

[0024] Figure 2 and Figure 3 FIG. 4 is an embodiment of a battery temperature graph based on the battery remaining capacity of a BMS device according to the present invention.

[0025] Figure 4 FIG. 4 is another embodiment of a battery temperature graph based on the battery remaining capacity of a BMS device according to the present invention.

[0026] Figures 5 to 7 is a flowchart of a BMS device control method according to the present invention.

[0027] Description of Reference Numerals

[0028] 1000: BMS device 100: Measurement unit

[0029] 200: Calculation unit 210: First calculation unit

[0030] 220: Second calculation unit 300: Control unit

[0031] C_th: reference value T_exp: predicted temperature

[0032] T_th: Reference temperature S100: Measurement steps

[0033] S200: Calculation step S210: First calculation step

[0034] S220: Second calculation step S300: Control step

[0035] S400: In the storage step DETAILED DESCRIPTION

[0036] Hereinafter, the BMS device and the control method thereof of the present invention will be described in detail with reference to the accompanying drawings.

[0037] like Figure 1As shown, the BMS device 1000 of the present invention may include a measuring unit 100 , a calculating unit 200 , and a controlling unit 300 . In addition, the calculating unit 200 may include a first calculating unit 210 and a second calculating unit 220 .

[0038] The above components are described in detail below. The measuring unit 100 can measure or estimate the temperature T, remaining capacity C, voltage V and charging current I of the battery B.

[0039] Battery B's temperature T, voltage V, and charging current I can be measured using known measurement tools or methods. Since the remaining charge C of battery B cannot generally be measured directly, it can be estimated indirectly. For example, to estimate the remaining charge C of battery B, the measured temperature T, voltage V, and / or charging current I of battery B can be utilized, but this is not limiting. The remaining charge C of battery B can be estimated using various currently known methods.

[0040] The first calculation unit 210 can calculate the remaining power C of the battery or the temperature change (ΔT / ΔC) of each charge amount of the battery B with respect to the temperature T of the voltage V based on the temperature T, remaining power C and voltage V information of the multiple batteries measured by the measurement unit 100 at different times t.

[0041] The second calculation unit 220 may calculate a predicted temperature T_exp of the battery B when the remaining charge C of the battery is charged to the first reference value C_th1 based on the temperature T of the battery B, the remaining charge C, and the temperature change (ΔT / ΔC) of each charge level.

[0042] The calculation unit 200 is further described in detail as follows. The first calculation unit 210 can calculate the temperature change (ΔT / ΔC) of each charge level based on the information of the first remaining charge level C1, the second remaining charge level C2, the first temperature T1, and the second temperature T2 shown in Table 1 below. Table 1 below shows the remaining charge level C and the temperature T of the battery measured at different times t.

[0043] [Table 1]

[0044] Time t Remaining power C Temperature T t1 C1 T1 t2 C2 T2 t3 C3 T3 ... ... ... t(k-2) C(k-2) T(k-2) t(k-1) C(k-1) T(k-1) t(k) C(k) T(k) ... ... ...

[0045] The temperature T of the battery B changes in association with the remaining charge C of the battery, and thus can be expressed by the following [Mathematical Formula 1].

[0046] [Mathematical formula 1]

[0047] T=f(C)=r i C i +r i-1 C i-1 ++r1C+r0

[0048] In addition, the above [Formula 1] can be approximated as the following [Formula 2].

[0049] [Mathematical formula 2]

[0050] T=f(C)≈r1C+r0

[0051] The above [Mathematical formula 2] is Figure 2 As a function of the trend line L, r1 in [Equation 2] represents the temperature change (ΔT / ΔC) for each charge level. Therefore, when the first remaining charge level C1, the second remaining charge level C2, the first temperature T1, and the second temperature T2 are substituted into [Equation 2], r1, i.e., the temperature change (ΔT / ΔC) for each charge level, can be calculated using (T2-T1) / (C2-C1). r0 can be calculated similarly. Therefore, the second calculation unit 220 can substitute the first reference value C_th1 into C in [Equation 2] for calculating r0 and r1 to calculate the predicted temperature T_exp.

[0052] In addition, the above-mentioned [Formula 1] can be approximated as the following [Formula 3].

[0053] [Mathematical formula 3]

[0054] T=f(C)≈r2C 2 +r1C+r0

[0055] As shown in [Table 1] and Figure 3 As shown, when the current moment is t3, the first calculation unit 210 can use the temperature T and remaining power C information of the battery B at the previous moments t1 and t2 to calculate r0, r1, and r2 of [Mathematical Formula 3], and the second calculation unit 220 can substitute the first reference value C_th1 into C of [Mathematical Formula 3] for calculating r0, r1, and r2 to calculate the predicted temperature T_exp.

[0056] Similarly, when the current time is t(k), the first calculation unit 210 can use the temperature T and remaining power C information of battery B at the previous times t(k-2) and t(k-1) to calculate r0, r1, and r2 in [Mathematical Formula 3]. The second calculation unit 220 can substitute the first reference value C_th1 into C in [Mathematical Formula 3] for calculating r0, r1, and r2 to calculate the predicted temperature T_exp.

[0057] At this time, when the trend equation of the battery temperature T based on the remaining power C of battery B is approximated as shown in [Formula 3], a more accurate predicted temperature T_exp can be calculated than when it is approximated as shown in [Formula 2]. In addition, the control unit 300 can also calculate a more accurate charging current I, thereby enabling fast charging.

[0058] As shown in [Formula 2] and [Formula 3] above, the BMS device 1000 according to the present invention can use the battery temperature T based on the remaining power C of battery B at the current moment and one or two previous moments to approximate [Formula 1], and can also use the remaining power C and temperature T of battery B at more than two previous moments to approximate [Formula 1].

[0059] On the other hand, the control part 300 may control the first charging current I_c1 based on information comparing the predicted temperature T_exp calculated by the second calculation part 220 with the first reference temperature T_th1 set by the user, and may charge the battery with the first charging current I_c1.

[0060] Specifically, if Figure 2 (a) or Figure 3 As shown, when the predicted temperature T_exp of the trend line L is lower than the first reference temperature T_th1, the first charging current I_c1 can be controlled and increased, as shown in FIG. Figure 2 (b) or Figure 3 As shown, when the predicted temperature T_exp of the trend line L is greater than the first reference temperature T_th1 , the first charging current I_c1 can be controlled and reduced.

[0061] On the other hand, Figure 1 As shown, the BMS device 1000 of the present invention may further include a storage unit 400. The storage unit 400 may obtain a history of stored past charging data.

[0062] Describing the storage unit 400 in more detail, when the second calculation unit 220 controls the first charging current I_c1 by comparing the predicted temperature T_exp with the first reference temperature T_th1, the storage unit 400 can store and obtain the optimal charging current I_opt data for the case where the predicted temperature T_exp and the first reference temperature T_th1 are equal, based on the remaining charge C of battery B, the temperature T, and the temperature change (ΔT / ΔC) of each charge level, as shown in Table 2 below. Therefore, when there is a difference between the predicted temperature T_exp and the first reference temperature T_th1, the optimal charging current I_opt for the case where the predicted temperature T_exp and the first reference temperature T_th1 are equal can be directly calculated, without the need to gradually increase or decrease the first charging current I_c1.

[0063] [Table 2]

[0064] Remaining power C Temperature T ΔT / ΔC Predicted temperature T_exp I_opt ... ... ... ... ... C(k) T(k) ΔT / ΔC(k) T_exp(k) I_opt(k) C(k+1) T(k+1) ΔT / ΔC(k+1) T_exp(k+1) I_opt(k+1) C(k+2) T(k+2) ΔT / ΔC(k+2) T_exp(k+2) I_opt(k+2) ... ... ... ... ...

[0065] Furthermore, when the optimal charging current I_opt data corresponding to the predicted temperature T_exp and the first reference temperature T_th1, which are based on the remaining charge C of battery B, the temperature T, and the temperature change (ΔT / ΔC) of each charge level, as shown in Table 2 below, is stored and obtained in the storage unit 400, the storage unit 400 can calculate the optimal charging current I_opt using the current remaining charge C of battery B, the temperature T, the preset first reference temperature T_th1, and the first reference value C_th1. The preset first reference temperature T_th1 and the first reference value C_th1 can be set by the user.

[0066] More specifically, the remaining charge C of the battery B measured at the current moment, the temperature T, the preset first reference temperature T_th1, and the first reference value C_th1 are used to calculate the temperature change (ΔT / ΔC) of each charge amount using the following [Mathematical Formula 4]:

[0067] [Formula 4]

[0068]

[0069] Furthermore, as shown in the following [Equation 5], the optimal charging current I_opt can be calculated using the remaining charge C of battery B, the temperature T, and the temperature change (ΔT / ΔC) of each charge amount as shown in [Table 2].

[0070] [Formula 5]

[0071]

[0072] Therefore, even if the characteristics of the optimal charging current I_opt based on the remaining capacity C, temperature T, and temperature change (ΔT / ΔC) of each battery B unit are unknown, the BMS device 1000 according to the present invention can calculate the optimal charging current I_opt by grasping the characteristics of the battery B unit, thereby suppressing degradation of the battery unit while quickly charging the secondary battery.

[0073] Furthermore, when the temperature T of battery B measured by the measurement unit 100 exceeds the first reference temperature T_th1, the control unit 300 may charge battery B using a second charging current I_c2 that is less than the first charging current I_c1 as the battery charging current I. In other words, the second charging current I_c2 may be less than the first charging current I_c1. In this case, the second charging current I_c2 may be 50% to 99% of the first charging current I_c1.

[0074] Furthermore, when the remaining charge C of battery B measured by the measurement unit 100 exceeds the first reference value C_th1, the control unit 300 may charge battery B using a third charging current different from the first charging current I_c1 as the charging current I for battery B. Specifically, the third charging current I_c3 may be smaller than the first charging current I_c1. In this case, the third charging current I_c3 may be 50% to 99% of the first charging current I_c1.

[0075] As described above, the first calculation unit 210 calculates the temperature change (ΔT / ΔC) for each charge level of battery B and approximates a mathematical formula for the temperature T of battery B based on the remaining charge C of battery B. When the remaining charge C of battery B is charged to the first reference value C_th1, the second calculation unit 220 uses the approximate mathematical formula to calculate the predicted temperature T_exp of battery B. The control unit 300 calculates the first charging current I_c1. When the first reference temperature T_th1 or the first reference value C_th1 is exceeded, the charging current I of battery B is reduced or changed to continue charging.

[0076] On the other hand, the BMS device 1000 of the present invention can set a plurality of reference temperatures of the batteries B and reference values ​​of the remaining capacities C of the batteries B to calculate the charging current I of the batteries B and charge them.

[0077] For example, Figure 4 As shown, when the temperature T of battery B exceeds the first reference temperature T_th1, or the remaining charge C of battery B exceeds the first reference value C_th1, the control unit 300 does not change the charging current I of battery B to the second charging current I_c2 or the third charging current I_c3. Instead, the first calculation unit 210 recalculates the temperature change (ΔT / ΔC) of each charge amount of battery B to obtain the trend equations of the temperature T trend lines L1', L2', and L3' of battery B based on the remaining charge C of battery B, as shown in [Equation 2] or [Equation 3]. Furthermore, when the remaining power C of the battery B is charged to the second reference value C_th2, the second calculation unit 220 calculates the predicted temperature T_exp of the battery B using the trend formula, so that when the predicted temperature T_exp is below the second reference temperature T_th2 as shown by the extension line of L3, the control unit 300 can increase the charging current I and charge as shown by L3'; when the predicted temperature T_exp is above the second reference temperature T_th2 as shown by the extension line of L1, the control unit 300 can reduce the charging current I and charge as shown by L1'.

[0078] As described above, multiple reference temperatures can be set to more accurately prevent the temperature of the battery B unit from reaching a temperature that causes unit degradation, and multiple reference values ​​of the remaining power C of the battery B can be set to enable the remaining power C of the battery B to reach a specific reference value more quickly, thereby enabling fast charging.

[0079] Next, the control method of the BMS device 1000 of the present invention will be described in detail.

[0080] like Figure 5 As shown, the control method of the BMS device 1000 of the present invention may include a measurement step S100, a calculation step S200, and a control step S300. Furthermore, the calculation step S200 may include a first calculation step S210 and a second calculation step S220. Each step is described in detail below. In the measurement step S100, the temperature T, remaining charge C, voltage V, and charging current I of battery B may be measured or estimated. Furthermore, in the first calculation step S210, based on the temperature T, remaining charge C, and voltage V information of the multiple batteries measured at different times t in the measurement step S100, the temperature change (ΔT / ΔC) for each charge level that increases when the remaining charge level ΔC is increased may be calculated. Furthermore, a mathematical formula for the temperature T of battery B based on the remaining charge C of battery B may be approximated. This has been described in detail in the description of the BMS device 1000, and therefore will be omitted here.

[0081] Furthermore, in the second calculation step S220, a predicted temperature T_exp of battery B may be calculated when the remaining charge C of battery B is charged to a first reference value C_th1 based on information about the temperature T of battery B, the remaining charge C, the temperature change (ΔT / ΔC) at each charge level, and an approximation of the temperature T of battery B based on the remaining charge C of battery B. In this case, in the control step S300, when the predicted temperature T_exp calculated in the second calculation step S220 is below the preset first reference temperature T_th1, the first charging current I_c1 is increased, and when the predicted temperature T_exp is above the first reference temperature T_th1, the first charging current I_c1 is decreased, thereby calculating the first charging current I_c1.

[0082] On the other hand, Figure 5 As shown, the control method of the BMS device 1000 of the present invention may further include a storage step S400. In the storage step S400, a history of stored previous charging data may be obtained.

[0083] The storage step S400 is further described in detail as follows. In the second calculation step S220, when the predicted temperature T_exp is compared with the first reference temperature T_th1 to control the first charging current I_c1, Figure 5As shown, in the storage step S400, the increase and decrease of the first charging current I_c1 are obtained, so that the optimal charging current I_opt for the battery B with the remaining capacity C, the temperature T, and the predicted temperature T_exp being the same as the first reference temperature T_th1 can be stored and obtained. Therefore, when there is a difference between the predicted temperature T_exp and the first reference temperature T_th1, the optimal charging current I_opt for the predicted temperature T_exp and the first reference temperature T_th1 can be directly calculated without the step of gradually increasing or decreasing the first charging current I_c1.

[0084] like Figure 6 As shown, when the temperature T of battery B measured in the measuring step S100 exceeds the first reference temperature T_th1, or the remaining capacity C of battery B exceeds the first reference value C_th1, in the controlling step S300, a second charging current I_c2 lower than the first charging current I_c1 or a third charging current I_c3 different from the first charging current I_c1 can be used as the charging current I of battery B to charge battery B.

[0085] The present invention is not limited to the above embodiments, but has various applicable scopes, and various modifications can be implemented without departing from the gist of the present invention as claimed in the claims.

Claims

1. A battery management system device, comprising: A measuring unit that measures or estimates the battery's temperature, remaining capacity, voltage, and charging current; a first calculating unit for calculating a temperature change amount of each charge amount of the temperature of the battery with respect to the remaining charge or voltage of the battery based on the temperature, remaining charge, and voltage of the battery measured at different times by the measuring unit; a second calculating unit, calculating a predicted temperature of the battery when the remaining power of the battery is charged to a first reference value based on the temperature, the remaining power of the battery, and the temperature change of each charging power; as well as a control unit that controls a first charging current based on information comparing the predicted temperature calculated by the second calculation unit with a preset first reference temperature, and charges the battery using the first charging current; When the predicted temperature is lower than the first reference temperature, the control unit increases the first charging current, and when the predicted temperature is higher than the first reference temperature, the control unit decreases the first charging current. The first calculation unit calculates the temperature change amount of each charge amount based on the first remaining charge amount, the second remaining charge amount, the first temperature, and the second temperature. The first remaining power is the remaining power of the battery measured at a first moment, and the second remaining power is the remaining power of the battery measured at a second moment different from the first moment. The first temperature is the temperature of the battery measured at the first moment, and the second temperature is the temperature of the battery measured at the second moment.

2. A battery management system device, comprising: A measuring unit that measures or estimates the battery's temperature, remaining capacity, voltage, and charging current; a first calculating unit for calculating a temperature change amount of each charge amount of the temperature of the battery with respect to the remaining charge or voltage of the battery based on the temperature, remaining charge, and voltage of the battery measured at different times by the measuring unit; a second calculating unit, calculating a predicted temperature of the battery when the remaining power of the battery is charged to a first reference value based on the temperature, the remaining power of the battery, and the temperature change of each charging power; as well as a control unit that controls a first charging current based on information comparing the predicted temperature calculated by the second calculation unit with a preset first reference temperature, and charges the battery using the first charging current; When the predicted temperature is lower than the first reference temperature, the control unit increases the first charging current, and when the predicted temperature is higher than the first reference temperature, the control unit decreases the first charging current. When the temperature of the battery measured by the measuring unit exceeds the first reference temperature, the control unit charges the battery using a second charging current that is less than the first charging current as the charging current of the battery.

3. A battery management system device, comprising: A measuring unit that measures or estimates the battery's temperature, remaining capacity, voltage, and charging current; a first calculating unit for calculating a temperature change amount of each charge amount of the temperature of the battery with respect to the remaining charge or voltage of the battery based on the temperature, remaining charge, and voltage of the battery measured at different times by the measuring unit; a second calculating unit, calculating a predicted temperature of the battery when the remaining power of the battery is charged to a first reference value based on the temperature, the remaining power of the battery, and the temperature change of each charging power; as well as a control unit that controls a first charging current based on information comparing the predicted temperature calculated by the second calculation unit with a preset first reference temperature, and charges the battery using the first charging current; When the predicted temperature is lower than the first reference temperature, the control unit increases the first charging current, and when the predicted temperature is higher than the first reference temperature, the control unit decreases the first charging current. When the remaining power of the battery measured by the measuring unit exceeds the first reference value, the control unit charges the battery using a third charging current different from the first charging current as the charging current of the battery.

4. A control method for a battery management system device, comprising: Measuring step, measuring or estimating the battery temperature, remaining capacity, voltage and charging current; a first calculating step of calculating a temperature change amount of each charge amount of the temperature of the battery with respect to the remaining charge or voltage of the battery based on the temperature, remaining charge, and voltage of the battery measured at different times in the measuring step; a second calculation step of calculating a predicted temperature of the battery when the remaining power of the battery is charged to a first reference value based on the temperature, the remaining power of the battery, and the temperature change of each charging power; as well as a control step of controlling a first charging current based on information obtained by comparing the predicted temperature calculated in the second calculation step with a preset first reference temperature, and charging the battery with the first charging current; In the control step, when the predicted temperature is lower than the first reference temperature, the first charging current is increased, and when the predicted temperature is higher than the first reference temperature, the first charging current is decreased. In the first calculation step, the temperature change of each charge amount is calculated based on the first remaining charge, the second remaining charge, the first temperature, and the second temperature. The first remaining power is the remaining power of the battery measured at a first moment, and the second remaining power is the remaining power of the battery measured at a second moment different from the first moment. The first temperature is the temperature of the battery measured at the first moment, and the second temperature is the temperature of the battery measured at the second moment.

5. A control method for a battery management system device, comprising: Measuring step, measuring or estimating the battery temperature, remaining capacity, voltage and charging current; a first calculating step of calculating a temperature change amount of each charge amount of the temperature of the battery with respect to the remaining charge or voltage of the battery based on the temperature, remaining charge, and voltage of the battery measured at different times in the measuring step; a second calculation step of calculating a predicted temperature of the battery when the remaining power of the battery is charged to a first reference value based on the temperature, the remaining power of the battery, and the temperature change of each charging power; as well as a control step of controlling a first charging current based on information obtained by comparing the predicted temperature calculated in the second calculation step with a preset first reference temperature, and charging the battery with the first charging current; In the control step, when the predicted temperature is lower than the first reference temperature, the first charging current is increased, and when the predicted temperature is higher than the first reference temperature, the first charging current is decreased. In the control step, when the temperature of the battery measured in the measurement step exceeds the first reference temperature, the battery is charged using a second charging current that is less than the first charging current as the charging current of the battery.

6. A control method for a battery management system device, comprising: Measuring step, measuring or estimating the battery temperature, remaining capacity, voltage and charging current; a first calculating step of calculating a temperature change amount of each charge amount of the temperature of the battery with respect to the remaining charge or voltage of the battery based on the temperature, remaining charge, and voltage of the battery measured at different times in the measuring step; a second calculation step of calculating a predicted temperature of the battery when the remaining power of the battery is charged to a first reference value based on the temperature, the remaining power of the battery, and the temperature change of each charging power; as well as a control step of controlling a first charging current based on information obtained by comparing the predicted temperature calculated in the second calculation step with a preset first reference temperature, and charging the battery with the first charging current; In the control step, when the predicted temperature is lower than the first reference temperature, the first charging current is increased, and when the predicted temperature is higher than the first reference temperature, the first charging current is decreased. In the controlling step, when the remaining capacity of the battery measured in the measuring step exceeds the first reference value, the battery is charged using a third charging current different from the first charging current as the charging current of the battery.

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