JP2010130717A - Control device of secondary battery pack and charging/discharging device of secondary battery pack - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a control device of a secondary battery pack which simultaneously charges a plurality of the secondary battery packs having ID identification information and communication information by one charger without causing imbalance, and a charging/discharging device of the secondary battery pack. <P>SOLUTION: In order to simultaneously charge and discharge the plurality of secondary battery packs having the ID identification information and the communication information by one charger, the control device of the secondary battery pack and the charging/discharging device 1 of the secondary battery pack are constituted in such a manner that a CPU 13 controls the charging/discharging of the plurality of connected secondary battery packs by using the ID identification information which is set between the plurality of secondary battery packs A2, a secondary charging pack B3 and a secondary charging pack C4, and the charger 5, and transmits identification information from the secondary battery pack side, and the communication information which transmits a state including a voltage of the secondary battery pack. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a secondary battery pack control device and a secondary battery pack charging / discharging device for charging / discharging a plurality of connected secondary battery packs with respect to a secondary battery pack.

  FIG. 3 is a schematic diagram of a conventional secondary battery pack and charger. Usually, the secondary battery pack has a function of identifying whether the secondary battery pack and the charger are in a correct combination called ID identification information, and the secondary battery pack between the secondary battery pack and the charger called communication information. It has a function to transmit state information. For example, ID identification identifies a combination with the charger 42 by applying a prescribed voltage to an ID terminal 46 that is an external terminal of the secondary battery pack 41, and communication information is a communication that is an external terminal of the secondary battery pack 41. The state of the secondary battery pack is transmitted to the charger according to the time series of ON / OFF of the 5V voltage at the terminal 47.

  A secondary battery pack such as a lithium ion battery is provided with a protection circuit 44 for preventing deterioration of the battery performance and ensuring safety. Usually, the protection circuit 44 detects at least one abnormality among the overcharge, overdischarge, overcurrent, and overheat of the secondary battery 43, and the charge and discharge circuit of the secondary battery pack is detected based on the detection result. It has a protection function that controls blocking and connection.

  Patent Documents 1, 2, and 3 are examples in which control functions such as the protection circuit are controlled in the secondary battery pack. With this control function, if the charging circuit is interrupted due to prohibition of charging other than the corresponding charger, battery pack precharge output request, normal charge output request, full charge, overcharge, overcurrent, etc., the charger will The control relating to the charging of the normal secondary battery pack is performed by requesting on / off of the output to the charger such as stopping the output of the battery.

JP 2005-032664 A JP 2008-148369 A JP 2005-094934 A

  The charger side that receives the ID identification information and communication information of the secondary battery pack and the secondary battery pack says that one predetermined charger corresponds to one secondary battery pack with a predetermined charging operation. Since the secondary battery pack controls charging in a one-to-one relationship, it is difficult to charge a plurality of secondary battery packs simultaneously with one charger. Therefore, when using a plurality of secondary battery packs connected to a load, each secondary battery pack must be individually charged with one charger and then connected to the load. It was difficult to charge and discharge in a state where a plurality of secondary battery packs were connected to a load with a charger.

  Furthermore, when using batteries in parallel, if there is a difference in the voltage of each secondary battery pack, the secondary battery packs are charged and discharged, and the connected secondary battery pack detects an abnormality. Then, since the protection function may be activated to stop charging / discharging, it is necessary to prevent a voltage difference from occurring between the secondary battery packs. Therefore, as a condition required when using secondary battery packs connected in parallel, the voltage states of the respective secondary battery packs in parallel must be used in the same manner. In other words, if the discharge curve is not uniform, the above conditions always occur, which is dangerous. Therefore, when individually charging with one charger, the voltage is constantly monitored and the secondary battery pack used is charged with the same voltage state, and the secondary battery pack has the same function and equivalent deterioration. It was necessary to use a secondary battery pack of the same type.

  A technical problem of the present invention is a secondary battery capable of simultaneously charging a plurality of secondary battery packs having ID identification information and communication information with one charger without causing imbalance. The object is to provide a pack control device and a secondary battery pack charge / discharge device.

  The secondary battery pack control device and the secondary battery pack charging / discharging device of the present invention include a plurality of secondary battery packs having a plurality of ID identification information and communication information in one charger. It is set between the secondary battery pack and the charger, and the CPU uses a plurality of ID identification information that conveys identification information from the secondary battery pack side and communication information that conveys the state including the voltage of the secondary battery pack. The charging / discharging control of the connected secondary battery pack is performed.

  According to the present invention, a charger capable of supporting a predetermined secondary battery pack and a plurality of the secondary battery packs are connected to the charger. A secondary battery control device installed in between, ID identification information for confirming a proper combination of chargers corresponding to the secondary battery pack from the secondary battery pack, and the secondary battery pack from the secondary battery pack A plurality of the secondary battery packs and a CPU for controlling ON / OFF operation of the charging connection of the charger are installed by judging whether or not the charging operation is possible based on communication information for transmitting a charging state of the battery pack. A secondary battery pack controller characterized by the above can be obtained.

  According to the present invention, there is obtained a secondary battery pack control device characterized in that the voltages of the plurality of connected secondary battery packs are leveled.

  According to the present invention, the secondary battery pack control has an external communication function for determining the state of the secondary battery pack by the CPU and communicating with the external device such as the charger or the PC regarding the state. A device is obtained.

  According to the present invention, it is possible to obtain a secondary battery pack control device that performs charging and discharging of the plurality of connected secondary battery packs in a state where a load is connected.

  According to the present invention, it is possible to obtain a secondary battery pack control device in which a plurality of the connected secondary battery packs are connected in parallel.

  According to the present invention, in order to charge and discharge a plurality of secondary battery packs, a secondary battery charge / discharge device in which the charger capable of handling the secondary battery pack and the secondary battery pack control device are integrated. The ID identification information for confirming a proper combination of the chargers corresponding to the secondary battery pack from the secondary battery pack, and the charging state of the secondary battery pack are transmitted from the secondary battery pack. A secondary battery pack comprising a plurality of the secondary battery packs and a CPU for controlling the ON / OFF operation of the charging connection of the charger by judging whether the charging operation is good or not based on communication information A charge / discharge device is obtained.

  According to the present invention, it is possible to obtain a secondary battery pack charging / discharging device characterized by leveling the voltages of the plurality of connected secondary battery packs.

  According to the present invention, the secondary battery pack charge is characterized by having an external communication function for determining the state of the secondary battery pack by the CPU and communicating with the external device such as the charger or PC for the state. A discharge device is obtained.

  According to the present invention, there is obtained a secondary battery pack charging / discharging device that performs charging / discharging of a plurality of connected secondary battery packs in a state where a load is connected.

  According to the present invention, it is possible to obtain a secondary battery pack charging / discharging device in which a plurality of connected secondary battery packs are connected in parallel.

  According to the present invention, a plurality of secondary battery packs having ID identification information and communication information can be charged / discharged by a single charger without causing an unbalance in the plurality of secondary battery packs. is there.

  In addition, the secondary battery pack control device and the secondary battery pack charge / discharge device of the present invention can perform backup discharge without delay by using an ideal diode of FET. Therefore, the charge / discharge integrated type in the state which connected the some secondary battery pack to load becomes possible.

A secondary battery pack control device according to the present invention includes a charger capable of supporting a predetermined secondary battery pack and a plurality of predetermined secondary battery packs connected to the charger. And between the charger. The CPU mounted on the secondary battery pack control device includes ID identification information for confirming whether or not the combination of the charger corresponding to the secondary battery pack from the secondary battery pack is correct, and the secondary battery pack. The communication information for transmitting the charging state of the secondary battery pack determines the quality of the charging operation and controls the ON / OFF operation of the connection for charging a plurality of secondary battery packs and chargers. . In addition, the CPU also performs operation mode control for the charger and control of an external communication function for communicating with an external device such as a PC.
Moreover, the secondary battery pack charging / discharging apparatus of this invention comprises a secondary battery pack control apparatus and a charger as an integrated apparatus.

  Hereinafter, embodiments of the present invention will be described.

  FIG. 1 is a configuration diagram of a plurality of secondary battery pack parallel charging systems according to the present invention. FIG. 2 is a system configuration diagram of a plurality of secondary battery pack parallel charge / discharge integrated systems according to the present invention. 1 and FIG. 2 are configuration diagrams illustrating the case where three secondary battery packs A to C having an ID identification function and a communication function are connected in parallel, and three secondary battery packs are provided. The case of parallel connection will be described in detail.

  In the secondary battery pack charging / discharging device 1 of the present invention, the CPU 13 requests the charger 5 to always output in the normal charging mode via the charger ID terminal 12. There are CPU13, FET-A14, FET-B15, and FET-C16 as main components in the device, and the secondary battery pack A2 and secondary battery are turned on and off by the CPU 13 turning on and off FET-A14, FET-B15, and FET-C16. The charging output for the battery pack B3 and the secondary battery pack C4 is controlled. Further, a current limiting resistor A17, a current limiting resistor B18, and a current limiting resistor C19 are mounted. When the FET-A14, FET-B15, and FET-C16 are OFF, the current limiting resistor A17 and the current limiting resistor B18 are provided. A small current flows through the secondary battery pack A2, the secondary battery pack B3, and the secondary battery pack C4 via the current limiting resistor C19. The current limiting resistor A17, the current limiting resistor B18, and the current limiting resistor C19 are soft-start charging before starting charging with the FET-A14, FET-B15, and FET-C16 turned on, and between the secondary battery packs. Used for adjustment charging for voltage leveling when voltage balance is lost.

  Moreover, as a function which transmits the operation state of the secondary battery pack charging / discharging apparatus 1 outside, there are an LED function and an external communication function. In the LED function, when the battery pack is charged, LED-A20, LED-B21, and LED-C22 are turned on, and when the secondary battery pack A2, secondary battery pack B3, and secondary battery pack C4 are abnormal, LED-A20, LED -B21 and LED-C22 blink to inform the outside. Further, in the external communication function, the voltage of the secondary battery pack A2, the secondary battery pack B3, and the secondary battery pack C4, the operation state of the charge cutoff circuit, and the discharge cutoff circuit are connected by connecting an external PC 24 to the external communication terminal 23. It becomes possible to manage information.

  According to the present invention, the charging control is performed by the CPU 13 reading ID identification information and communication information from the secondary battery pack A2, the secondary battery pack B3, and the secondary battery pack C4. Of these, ID identification information has the highest priority in the basic operation of the present invention. As a result of the CPU 13 reading the ID identification information from the ID terminal A6, ID terminal B7, and ID terminal C8 of each secondary battery pack, the secondary battery pack A2, the secondary battery pack B3, and the secondary battery pack C4 are the secondary batteries. If it can be determined that the secondary battery pack is not compatible with the pack charging / discharging device 1, charging / discharging is not started. Next, as a result of the CPU 13 reading communication information from the ID terminal A6, ID terminal B7, and ID terminal C8 of each secondary battery pack, the secondary battery pack A2, the secondary battery pack B3, and the secondary battery pack C4 request charging. If it can be determined that the charging is performed, the CPU 13 turns on the FET-A14, FET-B15, and FET-C16 of the secondary battery pack A2, the secondary battery pack B3, and the secondary battery pack C4 that are requesting charging. Start. When charging is started, LED-A20, LED-B21, and LED-C22 are lit. At this time, charging is not started if there is at least one secondary battery pack that does not detect the charging request. On the contrary, if it becomes clear from the communication information that the secondary battery pack A2, the secondary battery pack B3, and the secondary battery pack C4 refuse to charge, the CPU 13 turns off the FET-A14, FET-B15, and FET-C16. To.

  Regarding the start of charging according to the present invention, the communication information from the ID terminal A6, ID terminal B7, and ID terminal C8 indicates that the CPU 13 has requested charging from the secondary battery pack A2, the secondary battery pack B3, and the secondary battery pack C4. After confirming, the secondary battery pack A2, the secondary battery pack B3, and the secondary battery pack C4 FET-A14, FET-B15, and FET-C16 of the secondary battery pack C4 are turned on to be charged. The same applies to the end of charging. If any one of the secondary battery pack A2, the secondary battery pack B3, and the secondary battery pack C4 rejects charging, the FET-A14, the FET-B15, The FET-C16 is turned off and charging is not performed. By performing this control in principle, imbalance between battery packs connected in parallel is prevented.

  In addition, using the communication function of each battery pack, charging is performed after confirming that no imbalance has occurred between the secondary battery packs using the communication terminal A9, the communication terminal B10, and the communication terminal C11. The CPU 13 periodically communicates at a constant cycle. As a result, if the voltage difference between the battery packs is equal to or greater than the voltage difference at which the protection function is activated due to overcurrent between the battery packs, the current described above is used. Adjustment charging is performed through the limiting resistor A17, the current limiting resistor B18, and the current limiting resistor C19, and the voltage is leveled. After that, when it is confirmed by communication that the voltage difference is less than half of the voltage difference that does not affect the protection operation by communication again, the FET-A14, FET-B15, and FET-C16 are turned on for charging.

  A communication function performed at a constant cycle includes a secondary battery pack abnormality detection function in addition to voltage management. When it is determined that charging abnormality such as overcharge or overcurrent has occurred in the battery pack as a result of communication with the secondary battery pack A2, secondary battery pack B3, or secondary battery pack C4, the connected secondary battery pack A2 The secondary battery pack B3 and the secondary battery pack C4 can be operated so as not to be charged at all. Further, when an abnormality is detected by this function, when the abnormality display SW 25 is pressed, the LED of the battery pack in which the abnormality has occurred blinks, and the abnormal secondary battery pack can be identified. If an abnormality occurs in the secondary battery pack A2, LED-A20 blinks, and FET-A14, FET-B15, and FET-C16 are turned off to limit charging.

  The charger is always in a normal output state, but until the CPU 13 detects a charge request from the ID terminal A6, ID terminal B7, ID terminal C8 of the secondary battery pack A2, secondary battery pack B3, secondary battery pack C4. In the meantime, FET-A14, FET-B15, and FET-C16 are OFF, and the secondary battery pack A2, the secondary battery pack B3, and the secondary battery pack C4 have a current limiting resistor A17, a current limiting resistor B18, and a current limiting resistor. In this state, the battery is charged with a small current via C19. At this time, LED-A20, LED-B21, and LED-C22 are off.

  If the voltage difference between the secondary battery packs is greater than or equal to the specified value from the communication result, FET-A14, FET-B15, FET-C16 are turned off, and the current limiting resistor A17, the current limiting resistor B18, The voltage between the battery packs is leveled through the current limiting resistor C19, and charging is not performed in a state where there is a voltage difference between the packs. After that, when it is confirmed by communication that the voltage difference is less than half of the voltage difference that does not affect the protection operation, the FET-A14, FET-B15, and FET-C16 are turned on and charged again.

  When the CPU 13 detects that any one of the ID terminal A6, the ID terminal B7, and the ID terminal C8 is in a charge rejection state, the CPU 13 turns on the FET-A14, FET-B15, and FET-C16. There is no. In addition, when charging rejection information is detected at any of the ID terminal A6, ID terminal B7, and ID terminal C8 during charging, the FET-A14, FET-B15, and FET-C16 of all the secondary battery packs are turned off. By terminating the charging, a voltage difference is generated between the battery pack that refuses charging and the battery pack that does not, and the connection pack is prevented from becoming unbalanced. Moreover, LED-A20, LED-B21, and LED-C22 will turn off when charging is completed.

  However, if the reason for the completion of charging is not only the detection of charging refusal of the ID terminal A6, ID terminal B7, ID terminal C8 but also the detection of the abnormality of the battery pack, by pressing the abnormality display SW 25 The location of the secondary battery pack in which an abnormality has occurred can be found.

  The secondary battery pack charging / discharging device of the present invention can be used as a charge / discharge integrated type while being connected to a load 26 as shown in FIG.

  In the present embodiment, the case where three secondary battery packs are connected in parallel has been described. However, the secondary battery pack control according to the present invention can perform the same response even when the number of parallel connections increases or when connected in series. It is clear that the device and the secondary battery pack charging / discharging device. Moreover, although it demonstrated as a structure which provided the charger in the secondary battery pack charging / discharging apparatus of this invention, you may make it the structure of a charger + secondary battery pack control apparatus as another structure, it is obvious.

  As mentioned above, although embodiment of this invention was described, this invention is not restricted to these embodiment, Even if there is a design change of the range which does not deviate from the summary of this invention, it is included in this invention. That is, various changes and modifications that can be naturally made by those skilled in the art are also included in the present invention.

  By using the secondary battery pack control device and the secondary battery pack charge / discharge device of the present invention, a plurality of secondary battery packs can be connected and charged / discharged at a time. In addition to being able to be connected and used, it is possible to increase the capacity, and charge and discharge as shown in FIG. 2 can be performed integrally, which requires a large capacity battery such as UPS. I think it can be used in the system.

Configuration diagram of a plurality of secondary battery pack parallel charging system of the present invention System configuration diagram of a plurality of secondary battery packs in parallel charging and discharging according to the present invention Schematic diagram of conventional secondary battery pack and charger

Explanation of symbols

1 Secondary battery pack charging / discharging device 2 Secondary battery pack A
3 Secondary battery pack B
4 Secondary battery pack C
5 Charger 6 ID terminal A
7 ID terminal B
8 ID terminal C
9 Communication terminal A
10 Communication terminal B
11 Communication terminal C
12 Charger ID terminal 13 CPU
14 FET-A
15 FET-B
16 FET-C
17 Current limiting resistor A
18 Current limiting resistor B
19 Current limiting resistor C
20 LED-A
21 LED-B
22 LED-C
23 External communication terminal 24 PC
25 SW for error display
26 Load 41 Secondary battery pack 42 Charger 43 Secondary battery 44 Protection circuit 45 CPU
46 ID terminal 47 Communication terminal

Claims (10)

  A secondary battery installed between the secondary battery pack and the charger in order to connect a plurality of secondary battery packs to the charger capable of supporting a predetermined secondary battery pack and the charger. ID control information for confirming a proper combination of chargers corresponding to the secondary battery pack from the secondary battery pack, and a charging state of the secondary battery pack from the secondary battery pack. A plurality of the secondary battery packs and a CPU for controlling the ON / OFF operation of the charging connection of the charger are mounted by judging whether or not the charging operation is possible based on the communication information transmitted. Next battery pack control device.   The secondary battery pack control device according to claim 1, wherein the voltage of each of the plurality of secondary battery packs connected is leveled.   3. The battery according to claim 1, further comprising an external communication function for determining a state of the secondary battery pack by a CPU and communicating the state with an external device such as the charger or a PC. Next battery pack control device.   4. The secondary battery pack control device according to claim 1, wherein charging and discharging of the plurality of connected secondary battery packs are performed in a state in which a load is connected. 5.   5. The secondary battery pack control device according to claim 1, wherein a plurality of the connected secondary battery packs are connected in parallel. 6.   In order to charge and discharge a plurality of secondary battery packs, a secondary battery charging / discharging device in which a charger capable of handling the secondary battery pack and the secondary battery pack control device are integrated, Charging operation based on ID identification information for confirming a proper combination of chargers corresponding to the secondary battery pack from the secondary battery pack and communication information for transmitting a charging state of the secondary battery pack from the secondary battery pack A secondary battery pack charging / discharging device comprising a plurality of the secondary battery packs and a CPU for controlling the ON / OFF operation of the charging connection of the charger.   The secondary battery pack charging / discharging device according to claim 6, wherein the voltages of the plurality of secondary battery packs connected to each other are leveled.   8. The second battery pack according to claim 6, further comprising an external communication function for determining a state of the secondary battery pack by a CPU and communicating with the external device such as the charger or the PC regarding the state. Secondary battery pack charge / discharge device.   9. The secondary battery pack charging / discharging device according to claim 6, wherein charging / discharging of the plurality of connected secondary battery packs is performed in a state where a load is connected. .   The secondary battery pack charge / discharge device according to any one of claims 6 to 9, wherein a plurality of the connected secondary battery packs are connected in parallel.

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