JP2013031303A - Battery pack non-contact charge method and battery pack - Google Patents

Battery pack non-contact charge method and battery pack Download PDF

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Publication number
JP2013031303A
JP2013031303A JP2011166097A JP2011166097A JP2013031303A JP 2013031303 A JP2013031303 A JP 2013031303A JP 2011166097 A JP2011166097 A JP 2011166097A JP 2011166097 A JP2011166097 A JP 2011166097A JP 2013031303 A JP2013031303 A JP 2013031303A
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charging
temperature
battery pack
secondary battery
battery cell
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JP2011166097A
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Japanese (ja)
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Hiroyoshi Yamamoto
洋由 山本
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Sanyo Electric Co Ltd
三洋電機株式会社
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage
    • Y02E60/12Battery technologies with an indirect contribution to GHG emissions mitigation

Abstract

PROBLEM TO BE SOLVED: To shorten a charge time while also protecting a battery pack from heat generation.SOLUTION: When the temperature of a secondary battery cell 2 is lower than a prescribed first threshold temperature TP1, no charge of electricity is given; when higher than the first threshold temperature TP1, a charge of electricity to the secondary battery cell 2 starts with a prescribed first charge current value which is the maximum value of a charge current. When the temperature of the secondary battery cell 2 remains at a prescribed second threshold temperature TP2 which is higher than prescribed first threshold temperature TP1, a charge of electricity is continued, and a charge current at the second threshold temperature TP2 is made a prescribed second charge current value which is lower than the first charge current value. When the temperature of the secondary battery cell 2 remains at a prescribed third threshold temperature TP3 which is higher than prescribed second threshold temperature TP2, a charge of electricity is continued, and a charge current at the third threshold temperature TP3 is made a prescribed third charge current value which is lower than the second charge current value. When the temperature of the secondary battery cell 2 is higher than the third threshold temperature TP3, a charge current is stopped.

Description

  The present invention electromagnetically couples a power receiving coil of a battery pack mounted on a charging base and a power transmitting coil of the charging base, and carries power from the power transmitting coil to the power receiving coil by a magnetic induction action to charge a built-in battery of the battery pack. The present invention relates to a contactless charging method and a battery pack.

  Many battery-driven devices typified by mobile devices such as mobile phones and portable music players are driven by a rechargeable battery for convenience of carrying. Such a battery-driven device stores a battery in a unit cell state or a battery pack state. The battery-driven device is charged by connecting a contact to a charger in a state where the battery is accommodated. On the other hand, a charging stand that charges the battery by transporting power to the receiving coil from the power transmission coil built in the charging stand using the action of electromagnetic induction without connecting the contacts in this way has been developed. (See Patent Document 1).

  In Patent Document 1 shown in FIG. 12, a charging stand 910 includes a power transmission coil 911 that is excited by an AC power supply, and a power reception coil 921 that is electromagnetically coupled to the power transmission coil 911 is provided in the battery pack 930. The battery 931 of the battery pack 930 is charged with the electric power induced by. The battery pack 930 accommodated in the battery drive device 920 has a built-in charging circuit that rectifies the alternating current induced by the power receiving coil 921 and supplies the rectified current to the battery 931 for charging. According to this structure, the battery pack 930 accommodated in the battery drive device 920 is placed on the charging base 910, and the battery 931 can be charged in a non-contact state without connecting the contacts.

  When charging the battery pack, electronic components such as a secondary battery cell and a charging circuit incorporated in the battery pack generate heat. In order to prevent the secondary battery cells and circuits from being deteriorated by heat, it is necessary to reduce the charging current. However, when the charging current is small, there is a problem that the charging time required to fully charge the battery pack becomes long. There is a strong demand for users to reduce the waiting time for charging as much as possible, and it has been difficult to satisfy such conflicting demands from the viewpoint of protecting the battery pack.

JP 2008-141940 A

  The present invention has been made to solve such conventional problems. A main object of the present invention is to provide a battery pack non-contact charging method and a battery pack capable of reducing a charging time while protecting the battery pack from heat generation.

Means for Solving the Problems and Effects of the Invention

  In order to achieve the above object, a contactless charging method for a battery pack according to the first aspect of the present invention places a battery pack 90 on a charging stand 110 and sends electric power from the charging stand 110 to the battery pack 90. The contactless charging method of charging the secondary battery cell 2 of the battery pack 90 incorporated by electromagnetically coupling the power receiving coil 1 built in the battery pack 90 with the power transmission coil 113 of the charging stand 110. When the detected temperature of the secondary battery cell 2 is lower than a predetermined first threshold temperature TP1, charging is not performed, and when the temperature is equal to or higher than the first threshold temperature TP1, the maximum value of the charging current The charging of the secondary battery cell 2 is started at a predetermined first charge flow value, and the temperature of the secondary battery cell 2 reaches a predetermined second threshold temperature TP2 higher than the first threshold temperature TP1. While charging, The charging current at the second threshold temperature TP2 is a predetermined second charging current value lower than the first charging current value, and the temperature of the secondary battery cell 2 is a predetermined third higher than the second threshold temperature TP2. While charging continues until the threshold temperature TP3, the charging current at the third threshold temperature TP3 is set to a predetermined third charging current value lower than the second charging current value, and the temperature of the secondary battery cell 2 is reached. However, when the temperature is higher than the third threshold temperature TP3, the charging current is stopped. As a result, when the temperature of the secondary battery cell is low, it can be energized with a larger current than usual to increase the amount of charge, shorten the charging time, and when the temperature of the secondary battery cell further rises It becomes possible to aim at protection of a secondary battery cell by switching charge amount small. Furthermore, by setting the second charging current to be approximately equal to the first charging current, it is possible to suppress the temperature rise of the secondary battery cell of the battery pack. It can be stopped to ensure safety.

  Further, according to the contactless charging method of the battery pack according to the second aspect, the first charging current value can be made substantially equal to the current value for charging when the battery pack 90 is connected to the AC adapter. . As a result, when charging a battery pack that can be contactlessly charged and charged with an AC adapter, the initial value of the charging current at the time of contactless charging is made almost equal to that when charging with an AC adapter, thereby extending the charging time. The charging circuit can be shared by making the charging current coincide with the charging current at the time of charging by the AC adapter while suppressing charging and increasing the charging current of contactless charging.

  Furthermore, according to the contactless charging method of the battery pack according to the third aspect, the correlation between the temperature and the charging current of the secondary battery cell 2 is used as a charging profile, and the charging current is set to the secondary battery cell 2. The charging profile that is lowered according to the temperature is configured in a staircase pattern. Thereby, since the battery pack is provided with a plurality of threshold setting temperatures between the first threshold temperature and the third threshold temperature, the charging current can be changed stepwise with respect to the rising and falling temperatures at each threshold temperature, The temperature control of the stable secondary battery cell can be performed, and the secondary battery cell can be protected.

  Furthermore, according to the contactless charging method of the battery pack according to the fourth aspect, the charging profile for reducing the charging current according to the temperature of the secondary battery cell 2 is continuously reduced. As a result, the temperature of the secondary battery cell can be continuously fed back to obtain a charge profile that is inversely proportional to the temperature, or a charge profile that reduces the current in a quadratic curve. The fed-back battery information can be rapidly charged by maintaining the response speed and continuously controlling the temperature of the secondary battery cells.

  Furthermore, according to the contactless charging method of the battery pack according to the fifth aspect, the battery pack 90 is connected to the battery driving device 100 that is driven and connected, or the battery pack 90 alone is recognized. It includes a process. Thereby, since the temperature of a battery pack single-piece | unit is compared with the temperature of the secondary battery cell in a battery drive apparatus, since a heat | fever is hard to accumulate, quick charge can be made still more possible.

  Furthermore, the battery pack contactless charging method according to the sixth aspect includes a step of changing the first threshold temperature TP1 during charging of the secondary battery cell 2 based on the recognition result. Thereby, since the temperature rise in a battery pack differs by the case where it uses by a battery drive apparatus, and the case where it uses as a battery pack, the charge start from 1st threshold temperature can be changed.

  Furthermore, according to the contactless charging method of the battery pack according to the seventh aspect, the method includes a step of changing the charging profile based on the recognition result. As a result, the battery pack can change the charge profile method based on the recognition of whether the battery pack is built into the battery-powered device during contactless charging or is a single battery pack. Can be selected.

  Further, according to the battery pack of the eighth aspect, the secondary battery cell 2, the voltage detection unit that detects the voltage of the secondary battery cell 2, and the current associated with charging / discharging of the secondary battery cell 2 A current detection unit for detecting, a temperature detection unit for detecting the temperature of the secondary battery cell 2, a power receiving coil 1, and a charging current that can charge the secondary battery cell 2 with power received by the power receiving coil 1. A charging circuit for converting the battery pack into a state where the battery pack is placed on a charging base for charging the battery pack, and a power transmission coil built in the charging base and the power receiving coil 1 are electromagnetically coupled to each other from the charging base. A battery pack 90 for sending power to the pack 90 to charge the secondary battery cell 2, wherein the battery pack 90 is further mounted on a charging stand, Connected to the battery-driven device to be driven Connection determination means for recognizing whether the battery pack 90 is a single unit, and in the charging circuit, the temperature of the secondary battery cell 2 detected by the temperature detection unit is a predetermined first threshold temperature. When the temperature is lower than TP1, charging is not performed. When the temperature is equal to or higher than the first threshold temperature TP1, charging of the secondary battery cell 2 is started at a predetermined first charging current value that is the maximum value of the charging current, The charging current at the second threshold temperature TP2 is changed to the first charging current while continuing charging until the temperature of the secondary battery cell 2 reaches a predetermined second threshold temperature TP2 higher than the first threshold temperature TP1. A predetermined second charging current value lower than the value, and while the secondary battery cell 2 continues to be charged until the temperature of the secondary battery cell 2 reaches a predetermined third threshold temperature TP3 higher than the second threshold temperature TP2, The charging current at the three threshold temperatures TP3 A third charging current value lower predetermined than two charging current value, temperature of the secondary battery cell 2 is higher than the third threshold temperature TP3 is configured to stop the charging current. As a result, when the temperature of the secondary battery cell is low, the charging amount can be increased by energizing with a larger current than usual to shorten the charging time, and when the battery temperature rises, the charging amount is decreased. By switching, it becomes possible to protect the secondary battery cell.

It is a perspective view which shows the state which sets the battery drive apparatus incorporating a battery pack to a non-contact charging stand. FIG. 2 is a vertical sectional view showing a state in which a battery driving device is set on the charging stand shown in FIG. 1 and a battery pack is charged. FIG. 3 is a vertical sectional view showing a state in which a battery pack is set on the charging stand shown in FIG. 2 and is charged. It is a graph which shows the charging current and charging voltage of a lithium ion secondary battery. It is a graph which shows contrast with the temperature of the secondary battery cell in the non-contact charge of Example 1 by this invention, and the charging current to a secondary battery cell. It is a graph which shows contrast with the temperature of the secondary battery cell in the non-contact charge of Example 2 by this invention, and the charging current to a secondary battery cell. It is a graph which shows the contrast of the temperature of the secondary battery cell and the charging current to a secondary battery cell in non-contact charge in the modification 1 of FIG. It is a graph which shows the contrast of the temperature of the secondary battery cell and the charging current to a secondary battery cell in non-contact charge in the modification 2 of FIG. It is a graph which shows contrast with the temperature of the secondary battery cell in non-contact charge in the modification 3 of FIG. 6, and the charging current to a secondary battery cell. It is a block diagram of the electric circuit in FIG. 1 and FIG. It is a block diagram of the electric circuit in FIG. It is vertical sectional drawing which shows the state which set the battery drive apparatus to the charging stand by the conventional non-contact charge.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiment described below exemplifies a battery pack contactless charging method and a battery pack for embodying the technical idea of the present invention, and the present invention is a battery pack contactless charging method and The battery pack is not specified as follows. Further, in the present specification, in order to facilitate understanding of the scope of claims, numbers corresponding to the members shown in the embodiments are indicated in the “claims” and “means for solving problems” sections. It is appended to the members shown. However, the members shown in the claims are not limited to the members in the embodiments. In particular, the dimensions, materials, shapes, relative arrangements, and the like of the constituent members described in the embodiments are not intended to limit the scope of the present invention only to the description unless otherwise specified. It is just an example. Note that the size, positional relationship, and the like of the members shown in each drawing may be exaggerated for clarity of explanation. Furthermore, in the following description, the same name and symbol indicate the same or the same members, and detailed description thereof will be omitted as appropriate. Furthermore, each element constituting the present invention may be configured such that a plurality of elements are constituted by the same member and the plurality of elements are shared by one member, and conversely, the function of one member is constituted by a plurality of members. It can also be realized by sharing. In addition, the contents described in some examples and embodiments may be used in other examples and embodiments.

  Hereinafter, an embodiment of a battery pack in contactless charging will be described with reference to FIGS. 1 to 3 as an example. FIG. 1 is a perspective view showing a state in which a battery driving device incorporating a battery pack is set on a contactless charging stand, and FIG. 2 is a vertical sectional view showing a state in which the battery driving device is set on the charging stand and the battery pack is charged. FIG. 3 is a vertical sectional view showing a state where the battery pack is set on the charging stand and charged.

  First, the charging stand 110 shown in FIGS. 1 to 3 includes a power transmission coil 113 that is electromagnetically coupled to the power receiving coil 1 of the battery pack 90, and a high frequency power supply control circuit 114 that supplies high frequency power to the power transmission coil 113. Further, the high frequency power supply control circuit 114 is supplied with DC power from any one of the connection plug 141 from the AC / DC adapter (not shown), the USB cable 142, or the secondary battery 112 for charging stand. The contactless charging stand 110 is provided with a DC input terminal 117 including a DC connection terminal 117 </ b> A for connecting a connection plug 141 from an AC / DC adapter and a USB terminal 117 </ b> B for connecting a USB cable 142, in the exterior case 111. The DC input terminal 117 is charged to the charging stand secondary battery 112 and directly supplied to the high frequency power supply control circuit 114. When no power is supplied to the DC input terminal 117, DC power can be supplied from the charging stand secondary battery 112 to the high frequency power supply control circuit 114. As a result, the charging stand 110 can be carried, and even if there is no power supply to the DC input terminal 117, the high frequency power supply control circuit 114 supplies high frequency power by supplying the DC power of the secondary battery 112 for charging stand. Can be generated.

Furthermore, the power transmission coil 113 of the charging stand 110 uses the power reception coil 1 as a non-contact charge transmitter for feedback information on the voltage, current and temperature information, connection determination, etc. of the secondary battery cell 2 in the battery pack 90 along with power transmission. Can receive. This feedback information is processed by the power transmission control board 115 inside the charging stand 110 and transmitted to the high frequency power supply control circuit 114, and the changed high frequency power can be supplied to the power transmission coil 113. Thereby, the charging stand 110 can monitor the voltage, current and temperature information of the battery pack 90, connection determination, etc., and can change the high frequency power to the power transmission coil 113 based on the information source.
(Secondary battery cell 2)

  Here, the secondary battery cell 2 built in the battery pack 90 can be formed as a metal case by forming an outer can integrally molded on each surface. For example, the metal case can be made of aluminum or the like, can be protected from exogenous impacts, and can have an excellent effect of heat dissipation.

The secondary battery cell in this embodiment uses a lithium ion secondary battery or a lithium polymer battery with a large volumetric energy density, so that the whole is light, thin, and small and can be used for portable drive devices with good convenience. There are features. However, the present invention is not limited to this, and the secondary battery cell can be any rechargeable secondary battery such as a nickel metal hydride battery or a nickel cadmium battery.
(Charge profile)

  FIG. 4 shows an example of the relationship between the temperature of the lithium ion secondary battery, the charging current, and the charging voltage. In this figure, regarding the temperature range of the unit cell temperature, the temperature thresholds T1 to T2 are the low temperature range, the temperature thresholds T2 to T3 are the standard temperature range, the temperature thresholds T3 to T4 are the high temperature range, and the temperature thresholds T5 to T6 are recommended. It is a temperature range. Further, the charging voltage has a safety region (voltage) between the temperature threshold T5 and the temperature threshold T6 that is between the temperature threshold T2 and the temperature threshold T3. In charging, it is important not to exceed the upper limit charging voltage. For this reason, in the battery pack 90 of the present invention, the voltage of the secondary battery cell 2 is constantly monitored in the battery pack 90. The battery pack 90 includes a circuit for stopping the charging current to the secondary battery cell 2 when the upper limit charging voltage is exceeded, and safety is improved by stopping the electromagnetic supply from the charging stand 110. It is increasing. Moreover, in the low temperature range of the temperature thresholds T1 to T2 and the high temperature range of the temperature thresholds T3 to T4, it is desirable to satisfy one or both of the charging current and the charging voltage.

  Further, in the cell temperature and the charging current, the temperature threshold T1 indicates the lower limit charging temperature, and the temperature threshold T4 indicates the upper limit charging temperature. Further, the region between the temperature threshold T2 and the temperature threshold T3 is a safe region (current). Here, FIGS. 5 to 9 show graphs showing the contrast between the temperature of the secondary battery cell and the charging current to the secondary battery cell in non-contact charging. On the other hand, the battery pack 90 sends a control signal to the charging stand 110 based on the battery temperature information of the built-in secondary battery cell 2 and receives appropriate power reception from the power transmission coil 113. At this time, when the temperature of the secondary battery cell 2 is lower than the predetermined first threshold temperature TP1, charging is not performed, and when the temperature is equal to or higher than the first threshold temperature TP1, the predetermined first charging that is the maximum value of the charging current. Charging of the secondary battery cell 2 is started with the current value. Further, the charging current at the second threshold temperature TP2 is changed to the first charging current value while continuing the charging until the temperature of the secondary battery cell 2 reaches the predetermined second threshold temperature TP2 higher than the first threshold temperature TP1. Lower than the predetermined second charging current value. Furthermore, the charging current at the third threshold temperature TP3 is changed to the second charging current while continuing charging until the temperature of the secondary battery cell 2 reaches a predetermined third threshold temperature TP3 higher than the second threshold temperature TP2. The predetermined third charging current value is lower than the value. When the temperature of the secondary battery cell 2 is higher than the third threshold temperature TP3, the charging current is stopped. Note that “while continuing charging until...” Indicates that charging can be continued not only when the charging current is constant, but also while changing.

  In view of this, first, FIG. 5 shows a graph of the temperature of the secondary battery cell and the charging current to the secondary battery cell in the contactless charging of Example 1. Controlled high-frequency power is supplied to the power transmission coil 113 of the charging stand 110 based on the fed back temperature information. The high frequency power is received by the power receiving coil 1 electromagnetically coupled to the power transmitting coil 113. Furthermore, the induced electromotive force received by the power receiving coil 1 is converted into a direct current that has been rectified and smoothed by a rectification charge control unit 96 described later. The converted direct current is charged to the secondary battery cell 2 as shown in a graph in which the first threshold temperature TP1 is 0 degrees, the second threshold temperature TP2 is 40 degrees, and the third threshold temperature TP3 is 45 degrees. Shows the profile. Here, the first threshold temperature TP1 corresponds to a temperature threshold T2 proposed by the Battery Manufacturers Association (BAJ). Further, the second threshold temperature TP2 corresponds to the temperature threshold T3. Furthermore, the third threshold temperature TP3 corresponds to the temperature threshold T4 of the upper limit charging temperature.

  In the first embodiment shown in FIG. 5, the charging is started from the time of 0 degree of the first threshold temperature TP1, and the constant current is set to about 400 mA from 0 degree of the first threshold temperature TP1 to 40 degrees of the second threshold temperature TP2. Yes. This current value corresponds to the rated charging current at BAJ. Furthermore, the temperature is decreased in inverse proportion to the temperature from 40 degrees of the second threshold temperature TP2 to about 150 mA at 45 degrees of the third threshold temperature TP3. Furthermore, when the third threshold temperature TP3 exceeds 45 degrees, the transmission current is stopped so as to stop the charging current. In the charging profile of the first embodiment, the charging current change from the first threshold temperature TP1 to the third threshold temperature TP3 is the charging profile 1.

  When the temperature exceeds the upper limit charging temperature, the battery pack 90 charged by this charging profile 1 automatically charges the charging current at the third threshold temperature TP3 that is the upper limit charging temperature in order to avoid the possibility of thermal runaway. Has been stopped. Thereby, the thermal runaway by the heat to the secondary battery cell 2 can be avoided, and the possibility of damage can be reduced. Here, since the first threshold temperature TP1, the second threshold temperature TP2, the third threshold temperature TP3, and the upper limit charging temperature vary depending on the specifications of the secondary battery cell, the threshold setting of each temperature can be changed. Similarly, the value of the charging current itself at each threshold temperature can be changed to a different setting.

  In the charging profile 1 according to the first embodiment, contactless charging with emphasis on safety of the battery pack 90 is possible, but charging time is required. In order to shorten this, in the second embodiment, as shown in FIG. 6, an intermediate threshold is provided at an intermediate temperature between 0 degrees of the first threshold temperature TP1 and 40 degrees of the second threshold temperature TP2, and the first threshold temperature TP1 At the time of 0 degree, it is set to about 700 mA that is equivalent to the charging by the AC adapter and is close to the upper limit charging current, and the charging current is reduced to about 500 mA in inverse proportion to the temperature up to the intermediate threshold temperature. Thereby, when it becomes stable temperature between 1st threshold temperature TP1 and an intermediate | middle threshold value, the electric power supplied to the secondary battery cell 2 can be increased, and the charge amount of the secondary battery cell 2 is increased. Can be made. Further, the charging current at the temperature exceeding the intermediate temperature is decreased to about 400 mA in inverse proportion to the temperature between the temperature of the intermediate threshold value and 40 degrees which is the second threshold temperature TP2. Furthermore, as in the first embodiment, the second threshold temperature TP2 to the third threshold temperature TP3 are decreased to about 150 mA in inverse proportion to the temperature, and the charging current is stopped when the third threshold temperature TP3 is exceeded. . In the charging profile in the second embodiment, a charging current change from the first threshold temperature TP1 to the third threshold temperature TP3 is the charging profile 2. As a result, the battery pack 90 charged by the charging profile 2 can be charged with a charging current close to the maximum charging current at a low temperature, can be rapidly charged during this time, and the charging time can be shortened. The safety of the battery pack 90 is improved by decreasing the charging current each time the battery voltage increases. Furthermore, by stopping the charging current at 45 degrees of the third threshold temperature TP3 that is the upper limit charging temperature, adverse effects such as thermal runaway due to the heat of the secondary battery cell can be avoided.

  The temperature rise of these battery packs 90 is greatly influenced by the usage environment. For example, in the battery pack 90 built in the battery drive device 100 of FIGS. 1 and 2, heat tends to be trapped in the battery drive device and the temperature tends to rise as compared with the case of a single battery pack. According to such a situation, the charging profile 1 or the charging profile 2 is appropriately selected. For example, during a hot season such as summer, the battery-powered device 100 is also affected by the outside air temperature and becomes high temperature. At this time, by selecting the charging profile 1, the internal battery pack 90 can be protected. On the contrary, since the outside air temperature is lowered in winter, the battery-powered device 100 is also low in temperature, and by changing the charging method to the charging profile 2, rapid charging is possible and the charging time can be shortened. Here, the charging profile 2 is selected in order to shorten the charging time.

  The battery pack 90 can also monitor the voltage, current, and battery temperature of the internal secondary battery cell 2 and change the high-frequency power to the power transmission coil 113 based on the information. As a result, it is possible to automatically select the charging profile 2 when the battery temperature at the start of contactless charging is lower than the intermediate threshold temperature and to the charging profile 1 when the battery temperature is higher than the intermediate threshold temperature.

  In addition, since the battery pack 90 alone shown in FIG. 3 is in contact with the outside air, the temperature rise is suppressed, so that the charging current can be rapidly charged by the charging profile 2 method. .

  Furthermore, since the battery pack has a path changeover switch 93 to be described later as a connection determination unit as to whether the battery pack 90 is built in the battery-driven device 100 or a single battery pack 90, the first threshold temperature TP1 is set. Can be changed. For example, since the battery pack 90 is built in the battery-driven device 100, heat can be easily trapped, and safety can be improved by setting the first threshold temperature TP1 to 0 degree. On the other hand, the battery pack 90 charged by itself can change the 1st threshold temperature TP1 of the charge profile 2 to 0 degree | times or more, for example, can also be set to about 10 degree | times. This is because the battery pack 90 has a high cooling effect because it is in direct contact with the outside air. When the first threshold temperature is set to about 10 degrees, the battery pack 90 can be charged with the charging current close to the maximum charging current. It can be carried out efficiently.

  These charging profile 1 and charging profile 2 maintain the current value at the time when the battery cell 1 reaches a stable temperature within the third threshold temperature TP3 after a certain time has elapsed from the start of charging. The current can be continuously supplied to the cell 2 until it is fully charged. Thereby, the battery pack 90 can be fully charged safely and reliably. Furthermore, in the charging profile 2, the lower the temperature that is a constant temperature is, the higher the charging current is set, and quick charging becomes possible and the charging time can be shortened.

  Further, FIGS. 7 to 9 show graphs of the temperature of the secondary battery cell 2 and the charging current to the secondary battery cell 2 in non-contact charging as modified examples of the charging profile 2. First, in the charging profile 2 of the second embodiment, the charging current is decreased in inverse proportion to the temperature from the first threshold temperature TP1 to the intermediate threshold temperature. However, in the first modification shown in FIG. It is decreasing. The charging current is set to about 700 mA at the time of 0 degree of the first threshold temperature TP1, and is decreased by 10% for every 5 degrees rise. From the time when the temperature of the secondary battery cell 2 reaches about 25 degrees, the second threshold value is reached. The current is constant up to the temperature TP2. Furthermore, the charging current is decreased to about 150 mA in inverse proportion to the temperature from the second threshold temperature TP2 to the third threshold temperature TP3, and is stopped when the temperature exceeds the third threshold temperature TP3. As a result, when the temperature of the secondary battery cell 2 is stable in a low temperature range of about 25 degrees or less, rapid charging is possible, and when the stable temperature exceeds about 25 degrees, it is constant at about 400 mA. Charging is performed with electric current, and temperature rise due to charging can be suppressed.

  Furthermore, in the modified example 1, when the temperature of the secondary battery cell 2 is increased by 5 degrees, the charging current is reduced by 10%. However, the present invention is not limited to this, and depending on environmental conditions such as a subtropical region and a cold region, It is possible to change. For example, when used in subtropical areas, etc., every time the temperature of the secondary battery cell 2 rises, the charging current is sharply decreased by decreasing the charging current by 10%, and the secondary battery cell 2 is stabilized early. It is also possible to operate at temperature.

  Furthermore, in the case of use in a cold region or the like, the secondary battery cell 2 is affected by a low outside air temperature, so a charging profile as shown in FIG. It can also be. In this charging profile, the first threshold temperature TP1 to the second threshold temperature TP2 are decreased in inverse proportion to the temperature increase. Thereby, the secondary battery cell 2 can maintain the charging current in a state higher than the rated charging current value when the temperature is stable at the second threshold temperature TP2 or lower, and enables quick charging with a short charging time. Yes.

  Next, the modification 3 of the charging profile 2 of Example 2 shown in FIG. 9 is a charging profile that reduces the charging current in a quadratic curve from the first threshold temperature TP1 to the second threshold temperature TP2. As a result, the charging profile of Modification 3 sets the charging current at 0 ° C. of the first threshold temperature TP1 to about 700 mA, and the charging current decreases in a parabolic manner as the temperature rises. It reaches 400mA. Further, from the second threshold temperature TP2 to the third threshold temperature TP3, it is decreased to about 150 mA in inverse proportion to the temperature as in the first embodiment, and the charging current is stopped when the temperature exceeds the third threshold temperature TP3. Thereby, when the temperature rise of the secondary battery cell 2 due to the charging current is abrupt, the charging current can be immediately reduced, and the secondary battery cell 2 can be avoided from being damaged due to thermal runaway. Furthermore, the charge curve quadratic curve can be changed according to the specification requirements.

Here, the decrease in the charging current from the second threshold temperature TP2 to the third threshold temperature TP3 in Examples 1 and 2 and Modifications 1 to 3 is inversely proportional to the temperature. However, the present invention is not limited to this. The charging current value can also be lowered sharply in a quadratic curve. Further, the charging current at the third threshold temperature TP3 is about 150 mA, but is not limited to this, and can be a current value of about 150 mA or less, or about 0 mA.
(Charging stand 110)

  Here, FIG. 10 and FIG. 11 show schematic configurations of circuits for performing the charging profile. Here, in FIG. 10, the block diagram which charges the battery drive apparatus 100 with the charging stand 110 shown in FIG.1 and FIG.2 is shown. Here, the charging stand 110 and the battery pack 90 inside the battery drive device 100 are electromagnetically coupled. The charging stand 110 has a power transmission coil 113. Further, the battery pack 90 has a power receiving coil 1. In the electromagnetic coupling, a magnetic flux is generated by passing a high-frequency current through the power transmission coil 113 of the charging stand 110, and an induced electromotive force can be generated in the power receiving coil 1 by the magnetic flux. As a result, the secondary battery cell 2 of the battery pack 90 transmits the DC power that is rectified and smoothed by the rectification charge control unit 96 in the contactless charging circuit 95 from the induced electromotive force from the power receiving coil 1. Can be charged.

  Furthermore, the high frequency power supply control circuit 114 in the charging stand 110 can be supplied with DC power from a DC input terminal 117 having a DC connection terminal 117A and a USB terminal 117B from the AC / DC adapter. This DC power can be supplied to the high frequency power supply control circuit 114 along with charging of the charging stand secondary battery 112 of the charging stand 110, converted to high frequency power, and supplied to the power transmission coil 113. . Here, the high frequency power supply control circuit 114 includes a device detection circuit 119 that determines the presence or absence of a device that can receive power, and a high frequency control circuit 120 that controls transmission output power. Further, when DC power is not supplied to the DC input terminal 117, DC power can be supplied from the charging stand secondary battery 112 of the charging stand 110 to the high frequency power supply control circuit 114. Thereby, the transmission coil 113 that performs contactless charging can be electromagnetically coupled with the power receiving coil 1 on the power receiving device side by the magnetic flux, and can supply the induced electromotive force to the power receiving coil 1.

  Furthermore, the power supply to the high frequency power supply control circuit 114 is controlled by the DC power control circuit 121, and the switching of the DC input terminal 117 and the charging base secondary battery 112 is switched ON / OFF of the switches SW1, SW2, SW3 and SW4. It is done in. Here, when charging the secondary battery 112 for charging stand, the DC power control circuit 121 recognizes that DC power has been input from the DC input terminal 117, and the switch SW1 or SW2 and SW3 are turned on and energized. The The DC power supplied here is detected by the internal charging circuit 118 as to whether or not the secondary battery 112 for charging stand is fully charged. If charging is possible, charging is started, and power is not supplied when fully charged. Like that. Thereby, the charging stand 110 can be carried and power can be supplied to the high frequency power supply control circuit 114 by the internal battery 112 even in a place where there is no AC power supply or where a USB power supply cannot be obtained.

  The device detection circuit 119 determines whether or not the power receiving coil 1 that is electromagnetically coupled to the power transmitting coil 113 is within a recognizable range, and supplies power if within the power receiving range, and supplies power if outside the power receiving range. Stop. Thereby, the charging stand 110 can obtain an energy saving effect by transmitting power only when necessary without supplying wasteful power transmission energy.

  The high frequency control circuit 120 controls high frequency power supplied to the power transmission coil 113. Furthermore, the charging stand 110 has a power transmission control board 115 that receives information such as voltage, current and temperature information inside the battery pack 90 that receives power, and connection determination. The power transmission control board 115 has an in-phase signal removal circuit 116 for removing the high frequency generated by the high frequency power supply control circuit 114 in order to receive information of the battery pack 90. The power transmission control board 115 receiving the information of the battery pack 90 transmits the control signal to the high frequency control circuit 120 and adjusts the high frequency power to the power transmission coil 113 according to the information. Thereby, the information of the battery pack 90 can be accurately transmitted to the power transmission control board 115, and the induced electromotive force due to electromagnetic coupling to the battery pack 90 can be controlled.

Here, in the charging stand 110, the maximum current value and the maximum value for the secondary battery cell 2 are received by the power transmission control board 115 that receives information such as the voltage, current and temperature information in the battery pack 90 to receive power, and connection determination. The output of the charging stand 110 is controlled so that constant current / constant voltage charging with a regulated voltage value can be performed. Thereby, the charging stand 110 whose output is controlled can surely realize the charging of the secondary battery cell 2 of the battery pack 90 with a constant current or a constant voltage. Specifically, according to battery information such as voltage and current, for example, when charging a secondary battery cell to a maximum of 4.2V, when the voltage is 4.2V or less, the charging base is set so that the maximum predetermined constant current charging is achieved. 110 output adjustment is performed. Furthermore, when the voltage of the secondary battery cell reaches 4.2V, the output of the charging stand 110 is adjusted so that 4.2V can be maintained with the maximum constant voltage charging. Furthermore, the charging profile in the present embodiment is stored in the pack control unit 91 in the battery pack 90, and the output adjustment of the charging stand 110 is controlled so that a predetermined constant current is obtained based on the battery temperature information. can do.
(Battery pack 90)

  Next, the power receiving circuit of the battery pack 90 includes a power receiving coil 1, a secondary battery cell 2, a contactless charging circuit 95, a charging switch 98 as a switch such as an FET, a contactless current detecting resistor 99, a protection circuit 92, and a path switching. A switch 93, a temperature detection unit 94, a pack control unit 91, and the like are included. Further, the contactless charging circuit 95 has a rectification charge control unit 96 for rectifying and smoothing the induced electromotive force from the power receiving coil 1. Furthermore, the contactless charging circuit 95 transmits the feedback information to the charging stand 110 by using the receiving coil 1 as the contactless charging transmitter for the voltage, current and temperature information of the secondary battery cell 2 and information such as connection determination. An information modulation control unit 97 is also included.

  The receiving coil 1 receives the magnetic flux from the transmitting coil 113 of the charging stand 110 and is converted into an induced electromotive force. The rectifying and charging control unit 96 rectifies and smoothes the AC power to obtain DC power, and the secondary battery cell 2 Charging is possible. Thereby, the battery pack 90 of the battery-driven device 100 can be contactlessly charged, and troubles such as poor contact that occur during contact charging can be avoided.

  Here, the pack control unit 91 collects battery information such as voltage, current and temperature information of the secondary battery cell 2 and connection determination, and transmits the battery information to the information modulation control unit 97 in the contactless charging circuit 95. The information modulation control unit 97 repeats the transmission timing for transmitting the transmitted information and the non-transmission timing for not transmitting at a predetermined cycle, and transmits the battery information to the charging stand 110 via the power receiving coil 1. This period is set to, for example, 0.1 sec to 5 sec, preferably 0.1 sec to 1 sec. Since the remaining capacity, voltage, current, temperature, and the like of the secondary battery cell 2 that is contactlessly charged change, such battery information is repeatedly transmitted in the above-described cycle. Further, the battery information of the fully charged battery is transmitted at the timing when the charged battery is fully charged.

  As an information transmission method from the information modulation control unit 97 to the power receiving coil 1, a switching element (not shown) configured in the information modulation control unit 97 is switched ON / OFF by a digital signal indicating battery information, that is, Battery information is transmitted by frequency modulation. For example, the information modulation control unit 97 transmits battery information by performing ON / OFF control of the switching element at a speed of 1000 bps. However, the information modulation control unit 97 can also transmit battery information at 500 bps to 5000 bps. After the battery information is transmitted at 1000 bps at the transmission timing, the transmission of the battery information is stopped and the secondary battery cell is charged in a normal state at the non-transmission timing. At the transmission timing, the switching element is switched ON / OFF. Thus, the battery information is transmitted as a modulation frequency to the power transmission control board 115 on the charging stand 110 side, and is controlled by the high frequency control circuit 120, so that the output power of the high frequency power supply control circuit 114 can be controlled.

  Further, the secondary battery cell 2 is charged in a chargeable state by monitoring the voltage of the rectified DC power by the charge switch 98. Information monitored by the battery drop changing element 98 is transmitted to the information modulation control unit 97 via the pack control unit 91. Although the charge switch 98 in this embodiment is an FET in the drawing, it can be realized by a semiconductor element such as a transistor capable of current passage control. Preferably, energy saving can be realized by selecting a semiconductor element with low power loss when passing current.

  The voltage information of the secondary battery cell 2 detected here is controlled to stop by the pack control unit 91 when the upper limit charging voltage is reached, and the battery drop changing element 98 is opened, and the high frequency power source of the charging stand 110 is The output current of the control circuit 114 can be stopped. Thereby, the power transmission energy of the charging stand 110 can be reduced, and also the safety of the secondary battery cell 2 can be improved.

  Further, regarding the contactless charging current control, a voltage drop generated between the contactless current detection resistors 99 is detected by the pack control unit 91 and controlled by the battery drop changing element 98 and is transmitted to the information modulation control unit 97. It is also possible to control the output of the charging stand 110. Furthermore, the protection circuit 92 protects the secondary battery cell 2 with a charging current and a discharging current. Thereby, the battery pack 90 becomes a fail safe design regarding a charging current, and can improve safety | security more.

  Furthermore, the temperature of the secondary battery cell 2 is monitored by the temperature detection unit 94, and the information is sent to the pack control unit 91, and the information modulation control unit 97 in the contactless charging circuit 95 performs the charging table 110. The supply power is controlled. The temperature detection unit used here may be an NTC thermistor, a PTC thermistor, a thermal fuse, or the like.

  The temperature information of the secondary battery cell 2 detected here is transmitted to the high frequency control circuit 120 according to the charging profile programmed in the pack control unit 91 in the battery pack 90, and the output of the high frequency power supply control circuit 114 is output. It can be controlled by controlling the current. A plurality of charging profiles can be programmed, and can be selected according to the usage environment and usage status. Thereby, in the cold district, the above-described Example 2, Modification 1, Modification 2 and Modification 3 can be selected. If the battery temperature is the first threshold temperature TP1, the current is about 700 mA close to the maximum charging current. And the output current of the high frequency power supply control circuit 114 can be lowered under the conditions of each charging profile as the temperature rises, and charging can be performed in a short time. Furthermore, when the temperature of the secondary battery cell 2 is lower than the first threshold temperature TP1 and higher than the third threshold temperature TP3, the output current of the high frequency power supply control circuit 114 can be stopped, and the safety of the battery pack 90 Can increase the sex.

  Furthermore, the battery-driven device 100 used in the subtropical region or the like is always rated when the secondary battery cell 2 is equal to or lower than the second threshold temperature TP2 by selecting the charging profile 1 programmed in this embodiment. The charging current is about 400 mA. Thereby, heat_generation | fever of the receiving coil 1 and the secondary battery cell 2 in charge can be suppressed, and the thermal runaway of the secondary battery cell 2 can be avoided.

  Thus, the battery information of the voltage, current and temperature of the secondary battery cell 2 can operate so as to stop the charging current when the abnormality of the secondary battery cell 2 is detected by any parameter, The pack 90 is protected.

Further, at the time of contactless charging, the battery pack 90 is monitored by the pack controller 91 to which the output voltage of the contactless charging circuit 95 is applied to determine whether or not the battery pack 90 is connected to the drive device main body 101. . In this embodiment, the path switch 93 is normally open. For this reason, the voltage of the secondary battery cell 2 is applied to the pack control unit 91 when the battery pack 90 is connected to the drive device main body 101. On the other hand, the rectified voltage of the contactless charging circuit 95 is applied to the pack control unit 91 in the case of the battery pack 90 alone. For example, a voltage of about 4.2 V or less, which is the voltage of the secondary battery cell 2, is applied to the pack control unit 91 when the battery pack 90 is connected to the drive device main body 101. On the other hand, about 5 V that is a voltage after rectification of the contactless charging circuit 95 is applied to the pack control unit 91 in the case of the battery pack 90 alone. Thereby, this voltage difference is detected by the pack control unit 91, and the connection determination between the battery pack 90 and the drive device main body 101 is performed. However, this path changeover switch 93 becomes a closed state when the battery pack 90 alone is mounted on the non-contact charger 110 under the control of the pack control unit 91 after the above connection determination, and the secondary battery. Charging the cell 2 can be started. As a result, when the battery pack 90 alone is not placed on the charging stand 110, the path changeover switch 93 is in an open state, so that natural discharge due to storage or the like can be reduced.
(Drive device main body 101)

  Here, as an example of the circuit configuration of the drive device main body 101, in this embodiment, a DC input connector 152, an adapter determination circuit 151, an adapter charging circuit 153, a system power supply 154, a remaining capacity calculation unit 155 (FG-IC), and device control. Part 150 and the like. Here, the drive device main body 101 is detected by the adapter determination circuit 151 and the adapter charging circuit 153 when a DC power supply is connected to the DC input connector 152. When the DC power from the DC input connector 152 is detected, the adapter charging circuit 153 opens the battery drop changing element 98 of the battery pack 90 so that contactless charging cannot be performed. Further, adapter charging circuit 153 operates to supply power to system power supply 154 and battery pack 90. Thereby, the secondary battery cell 2 of the battery pack 90 is charged by the DC power from the DC input connector 152 of the drive device main body 101. At this point, the battery pack 90 transmits a power supply stop command to the charging stand 110 based on information from the pack control unit 91.

  As the operation at the time of non-contact charging, the charging switch 98 of the battery pack 90 is closed by the non-connection information of the DC input connector 152 from the driving device main body 101, and the induced electromotive force from the power receiving coil 1 is rectified and charged. The DC power rectified and smoothed at 96 charges the secondary battery cell 2.

  Next, the block diagram of FIG. 11 shows a single battery pack 90 that is contactlessly charged by the charging stand 110. The charging stand 110 operates as described above. Furthermore, the contactless charging circuit 95 detects that the battery pack 90 is placed on the charging stand 110, and the path control switch 93 is closed by the pack control unit 91 based on the information, and the secondary battery cell 2 Charge the battery. Since the secondary battery cell 2 has a high cooling effect due to the outside air, the charging profile 2 capable of rapid charging can be selected and the charging current can be increased and rapidly charged at low temperatures. Whether the battery pack 90 is a single unit or connected to the battery driving device 100 that is connected to and driven by the battery pack 90, the charging profile 2 can be used for rapid charging.

  Furthermore, the battery pack 90 that is contactlessly charged as a single unit can raise the first threshold temperature TP1, for example, the charging current can be further increased by setting the first threshold temperature TP1 to about 10 degrees. The charging time of the battery pack 90 can be shortened. This is because the secondary battery cell 2 in the battery pack 90 is affected by the outside air temperature, and the temperature of the secondary battery cell 2 becomes a stable temperature at a low temperature. It can be performed.

  The battery pack contactless charging method and battery pack according to the present invention can be suitably used as battery packs for mobile phones, portable music players, and PDAs.

DESCRIPTION OF SYMBOLS 1 ... Power receiving coil 2 ... Secondary battery cell 90 ... Battery pack 91 ... Pack control part 92 ... Protection circuit 93 ... Path switch 94 ... Temperature detection part 95 ... Non-contact charge circuit 96 ... Rectification charge control part 97 ... Information modulation control Unit 98 ... Charge switch 99 ... Contactless current detection resistor 100 ... Battery drive device 101 ... Drive device body 110 ... Charging stand 111 ... Exterior case 112 ... Charging stand secondary battery 113 ... Power transmission coil 114 ... High frequency power supply control circuit 115 ... Power transmission control board 116 ... In-phase signal removal circuit 117 ... DC input terminal 117A ... DC connection terminal 117B ... USB terminal 118 ... Internal charging circuit 119 ... Device detection circuit 120 ... High frequency control circuit 121 ... DC power control circuit 141 ... Connection plug 142 ... USB cable 150 ... Device control unit 151 ... Adapter determination circuit 152 ... DC input connector 153 ... A Putter charging circuit 154 ... system power supply 155 ... remaining capacity calculation unit 910 ... charging stand 911 ... power transmission coil 920 ... battery drive device 921 ... power receiving coil 930 ... battery pack 931 ... batteries SW1, SW2, SW3, SW4 ... switches T1, T2, T3, T4, T5, T6 ... temperature threshold TP1 ... first threshold temperature TP2 ... second threshold temperature TP3 ... third threshold temperature

Claims (8)

  1. A battery pack (90) is placed on the charging stand (110), power is sent from the charging stand (110) to the battery pack (90), and a power receiving coil (1) built in the battery pack (90) Is a non-contact charging method of charging the secondary battery cell (2) of the battery pack (90) by electromagnetically coupling with the power transmission coil (113) of the charging stand (110),
    Detect the temperature of the secondary battery cell (2),
    When the detected temperature of the secondary battery cell (2) is lower than a predetermined first threshold temperature (TP1), charging is not performed, and when the temperature is equal to or higher than the first threshold temperature (TP1), Start charging the secondary battery cell (2) at a predetermined first charge flow value that is the maximum value,
    While the temperature of the secondary battery cell (2) is continuously charged until the predetermined second threshold temperature (TP2) higher than the first threshold temperature (TP1), at the second threshold temperature (TP2) The charging current is a predetermined second charging current value lower than the first charging current value,
    While the secondary battery cell (2) is continuously charged until the temperature reaches a predetermined third threshold temperature (TP3) higher than the second threshold temperature (TP2), at the third threshold temperature (TP3) The charging current is a predetermined third charging current value lower than the second charging current value,
    A contactless charging method of a battery pack, wherein the charging current is stopped when the temperature of the secondary battery cell (2) is higher than the third threshold temperature (TP3).
  2. It is a non-contact charge method of the battery pack according to claim 1,
    The contactless charging method for a battery pack, wherein the first charging current value is substantially equal to a current value for charging when the battery pack (90) is connected to an AC adapter.
  3. A contactless charging method for a battery pack according to claim 1 or 2,
    The correlation between the temperature of the secondary battery cell (2) and the charging current is a charging profile,
    A contactless charging method for a battery pack, wherein a charging profile for reducing the charging current according to the temperature of the secondary battery cell (2) is formed in a stepped shape.
  4. A contactless charging method for a battery pack according to claim 1 or 2,
    A contactless charging method for a battery pack, wherein a charging profile for reducing the charging current according to the temperature of the secondary battery cell (2) is continuously reduced.
  5. A contactless charging method for a battery pack according to any one of claims 1 to 4, further comprising:
    A contactless state of the battery pack, comprising the step of recognizing either the state connected to the battery driving device (100) connected to the battery pack (90) or the battery pack (90) alone Charging method.
  6. A contactless charging method for a battery pack according to claim 5, further comprising:
    A contactless charging method of a battery pack, comprising a step of changing a first threshold temperature (TP1) during charging of the secondary battery cell (2) based on the recognition result.
  7. A contactless charging method for a battery pack according to claim 5 or 6, further comprising:
    A non-contact charging method for a battery pack, comprising a step of changing a charging profile based on the recognition result.
  8. A secondary battery cell (2),
    A voltage detector for detecting the voltage of the secondary battery cell (2);
    A current detector for detecting a current associated with charging / discharging of the secondary battery cell (2);
    A temperature detector for detecting the temperature of the secondary battery cell (2);
    A receiving coil (1),
    A charging circuit that converts the power received by the power receiving coil (1) into a charging current capable of charging the secondary battery cell (2);
    With
    While mounted on the charging base for charging the battery pack, the power transmission coil built in the charging base and the power receiving coil (1) are electromagnetically coupled to transmit power from the charging base to the battery pack (90). A battery pack (90) for charging the secondary battery cell (2),
    The battery pack (90) further includes
    Connection determination means for recognizing whether the battery pack (90) is connected to a battery-driven device to be driven or the battery pack (90) alone with the battery pack placed on the charging stand With
    The charging circuit is
    When the temperature of the secondary battery cell (2) detected by the temperature detector is lower than a predetermined first threshold temperature (TP1), charging is not performed, and when the temperature is equal to or higher than the first threshold temperature (TP1), Start charging the secondary battery cell (2) with a predetermined first charging current value that is the maximum value of the charging current,
    While the temperature of the secondary battery cell (2) is continuously charged until the predetermined second threshold temperature (TP2) higher than the first threshold temperature (TP1), at the second threshold temperature (TP2) The charging current is a predetermined second charging current value lower than the first charging current value,
    While the secondary battery cell (2) is continuously charged until the temperature reaches a predetermined third threshold temperature (TP3) higher than the second threshold temperature (TP2), at the third threshold temperature (TP3) The charging current is a predetermined third charging current value lower than the second charging current value,
    A battery pack, wherein the charging current is stopped when the temperature of the secondary battery cell (2) is higher than the third threshold temperature (TP3).
JP2011166097A 2011-07-28 2011-07-28 Battery pack non-contact charge method and battery pack Withdrawn JP2013031303A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014132486A1 (en) * 2013-02-27 2014-09-04 日立マクセル株式会社 Small electric device provided with non-contact charger and non-contact charging system
JP2015106981A (en) * 2013-11-29 2015-06-08 株式会社マキタ Charge control device
JP2015171159A (en) * 2014-03-04 2015-09-28 パナソニックIpマネジメント株式会社 non-contact charging system
WO2016170949A1 (en) * 2015-04-24 2016-10-27 京セラ株式会社 Electronic device and charging method
US9887593B2 (en) 2014-11-03 2018-02-06 Samsung Electro-Mechanics Co., Ltd. Non-contact type power transmitting apparatus, non-contact type power receiving apparatus, and non-contact type power transceiving apparatus
JP2018517387A (en) * 2016-02-05 2018-06-28 グァンドン オッポ モバイル テレコミュニケーションズ コーポレーション リミテッド Charging system for terminal, charging method and power adapter

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014132486A1 (en) * 2013-02-27 2014-09-04 日立マクセル株式会社 Small electric device provided with non-contact charger and non-contact charging system
JP2015106981A (en) * 2013-11-29 2015-06-08 株式会社マキタ Charge control device
JP2015171159A (en) * 2014-03-04 2015-09-28 パナソニックIpマネジメント株式会社 non-contact charging system
US9887593B2 (en) 2014-11-03 2018-02-06 Samsung Electro-Mechanics Co., Ltd. Non-contact type power transmitting apparatus, non-contact type power receiving apparatus, and non-contact type power transceiving apparatus
WO2016170949A1 (en) * 2015-04-24 2016-10-27 京セラ株式会社 Electronic device and charging method
JPWO2016170949A1 (en) * 2015-04-24 2017-11-16 京セラ株式会社 Electronic device and charging method
JP2018517387A (en) * 2016-02-05 2018-06-28 グァンドン オッポ モバイル テレコミュニケーションズ コーポレーション リミテッド Charging system for terminal, charging method and power adapter
US10461568B2 (en) 2016-02-05 2019-10-29 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Charging system, charging method, and power adapter

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