CN111951719A

CN111951719A - Apparatus and method for LED display control in charge-discharge system

Info

Publication number: CN111951719A
Application number: CN202010793599.4A
Authority: CN
Inventors: 李淼; 郑光文; 王发刚; 付朋飞
Original assignee: On Bright Electronics Shanghai Co Ltd
Current assignee: On Bright Electronics Shanghai Co Ltd
Priority date: 2020-08-10
Filing date: 2020-08-10
Publication date: 2020-11-17
Anticipated expiration: 2040-08-10
Also published as: CN111951719B; TWI748659B; TW202207756A

Abstract

An apparatus and method for LED display control in a charge-discharge system are disclosed. The apparatus includes a display code generator configured to generate a charge display code or a discharge display code based on a voltage signal and a charge state signal of a battery in a charge and discharge system, an LED display enable signal, and a plurality of preset voltage threshold signals; and a decoding driver configured to decode the charging display code or the discharging display code according to the charging state signal to generate a driving signal for driving the LED to display.

Description

Apparatus and method for LED display control in charge-discharge system

Technical Field

The present disclosure relates generally to the field of charging and discharging technology, and more particularly, to an apparatus and method for Light Emitting Diode (LED) display control in a charging and discharging system.

Background

In most charge and discharge systems, LED lamps are often used to visually display the operating state and the battery level of the charge and discharge system.

Currently, there are two mainstream LED display control schemes: one is that the battery voltage, the battery current and the battery internal resistance information are used for carrying out accurate operation to generate an electric quantity curve to control the LED display, but the scheme is complex and consumes a large amount of resources; the other is to only roughly display according to the battery voltage, although the scheme consumes less resources, in practical application, because the detected battery voltage is different under different states and different currents, a plurality of display problems are caused. Common problems include: the display power is decreased and changed gradually in the charging state and increased and changed gradually in the discharging state, and the lamp jumping occurs when the charging and discharging states are switched, namely, the number of the lamps and/or the flashing lamps is changed, wherein the lamp lighting means that the LED lamp is kept on, and the flashing lamp means that the LED lamp is turned on and off.

Disclosure of Invention

In view of one or more of the problems described above, the present disclosure provides novel apparatus and methods for LED display control in a charge and discharge system.

According to an aspect of the disclosed embodiments, an apparatus for LED display control in a charge and discharge system is disclosed, the apparatus including a display code generator configured to generate a charge display code or a discharge display code based on a voltage signal and a charge state signal of a battery in the charge and discharge system, an LED display enable signal, and a plurality of preset voltage threshold signals; and a decoding driver configured to decode the charging display code or the discharging display code according to the charging state signal to generate a driving signal for driving the LED to display.

According to another aspect of the disclosed embodiments, a method for LED display control in a charge-discharge system is disclosed, the method comprising: generating a charging display code or a discharging display code based on a voltage signal and a charging state signal of a battery in the charging and discharging system, an LED display enabling signal, and a plurality of preset voltage threshold signals; and decoding the charging display code or the discharging display code according to the charging state signal to generate a driving signal for driving the LED to display.

Drawings

The present disclosure may be better understood from the following description of specific embodiments thereof taken in conjunction with the accompanying drawings. For simplicity and clarity of illustration, elements illustrated in the figures have not necessarily been drawn to scale. For example, the dimensions of some of the elements may be exaggerated relative to other elements for clarity. Further, where considered appropriate, reference numerals have been repeated among the figures to indicate corresponding or analogous elements. In the drawings:

fig. 1A shows a schematic block diagram of a charge-discharge system in a charging state;

fig. 1B shows a schematic block diagram of the charge-discharge system in a discharge state;

fig. 2 shows a schematic diagram of an apparatus for LED display control in a charge-discharge system according to an embodiment of the present disclosure.

FIG. 3 shows a schematic diagram of an example display code generator, according to an embodiment of the present disclosure.

Fig. 4A illustrates a block diagram of an internal structure of an example charging display code generation module, according to an embodiment of the disclosure.

Fig. 4B illustrates a block diagram of an internal structure of an example discharge display code generation module, according to an embodiment of the present disclosure.

Fig. 5A illustrates a schematic diagram of an example charge display state to discharge display state transition, according to an embodiment of the disclosure.

Fig. 5B illustrates a schematic diagram of an example discharge display state to charge display state transition, according to an embodiment of the disclosure.

Fig. 6 shows a simplified flow diagram of a method for LED display control in a charge-discharge system according to an embodiment of the present disclosure.

Detailed Description

Features and exemplary embodiments of various aspects of the present disclosure will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure. It will be apparent, however, to one skilled in the art, that the present disclosure may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present disclosure by illustrating examples of the present disclosure. The present disclosure is in no way limited to any specific configuration and algorithm set forth below, but rather covers any modifications, substitutions, and alterations of elements, components, and algorithms without departing from the spirit of the present disclosure. In the drawings and the following description, well-known structures and techniques are not shown in order to avoid unnecessarily obscuring the present disclosure.

It is to be noted that, in the following description, reference may be made to "an apparatus", "a module", "a unit", "a component", and the like, which refer to a circuit or a part of a circuit.

Fig. 1A and 1B show schematic block diagrams of the charge and discharge system 100 in a charged state and a discharged state, respectively. When the charge and discharge system 100 is connected to a power source for charging, a charging current I is generated in the battery part 120_charge(ii) a And when the charge and discharge system 100 is connected to a load to supply power to the load, a discharge current I is generated in the battery part 120_discharge. Assuming a battery voltage V at the instant when the charge-discharge system 100 switches between the charged state and the discharged state_batIs maintained unchanged due to the charging current I_chargeAnd discharge current I_dischargeThe transition between the charging control circuit 110 and the battery voltage V_{bat_det}A change occurs. Such variations may cause problems such as lamp jump when the display of the LEDs is controlled solely according to the battery voltage. Taking the case of using four LED lamps as an example, the general definition of four LED lamps in the industry at present is as follows: 1 flash → 1 flash of light → 2 flash of light 1 → 3 flash of light 1 in the charging mode; in the discharge mode, 4 lights → 3 lights → 2 lights → 1 flashes → extinguishes. For example, the problem of lamp jump may be embodied as: a jump from 2 bright 1 flashes of the charged state to 1 bright of the discharged state upon switching from the charging mode to the discharging mode, or a jump from 2 bright of the discharged state to 3 bright 1 flashes of the charged state upon switching from the discharging mode to the charging mode, and so on.

The novel device and method for LED display control in a charge-discharge system provided by the present disclosure can meet the actual charge-discharge system power display requirement by defining the timing sequence of lighting up the charge/discharge modes only according to the battery voltage information, while avoiding the common problems encountered in the above-mentioned LED display control.

It should be noted that, for clarity and brevity, the following description is given by way of example with respect to the four LED lamps mentioned above, but it will be clear to those skilled in the art that the principles of the present disclosure may be applied to any suitable number of LED lamps, and are not limited to the four LED lamps described. Accordingly, this description is intended to be illustrative only and not limiting.

Fig. 2 shows a schematic diagram of an apparatus 200 for LED display control in a charge-discharge system according to an embodiment of the present disclosure. For example, the LED display control apparatus 200 may be disposed in the charge control circuit 110 of fig. 1 to control the display of the LED lamp of the charge and discharge system 100.

As shown, the apparatus 200 for LED display control may include a display code generator 210 and a decoding driver 220. The display code generator 210 receives the detected voltage signal V of the battery in the charge and discharge system (for example, the battery 120 in the charge and discharge system 100 of fig. 1)_{bat_det}201, a Charge state signal Charge _ ena 202, an LED display enable signal LED _ ena 203, and a plurality of preset voltage threshold signals V _th*204, and generates a Charge display code Charge _ code 211 or a Discharge display code Discharge _ code 212 based on the above signals.

The Charge _ ena 202 indicates whether the battery is charging or discharging, e.g., when the Charge _ ena 212 is high, indicating that the battery is charging, and the Charge _ ena 202 is low, indicating that it is discharging; or vice versa. Of course, other indication manners are also possible as long as the corresponding functions can be achieved, and are not described one by one here. Display code generator 210 generates a Charge code 211 when Charge _ ena 202 indicates that the battery is charging, and display code generator 210 generates a Discharge code 212 when Charge _ ena 202 indicates that the battery is discharging.

The LED _ ena 203 indicates whether the charge and discharge system enables the LED display to indicate its operating state or battery level. For example, when Charge _ ena 202 is high, it indicates that the LED display is enabled; conversely, when the Charge _ ena 202 is set to low, it indicates that the LED display is enabled. Of course, other indication manners are also possible as long as the corresponding functions can be achieved, and are not described one by one here.

V

_th*204 indicates a preset set of voltage thresholds, the number of which is related to the number of LED lamps used, in particular, the number may be related to the sum of predefined display states of the LED lamps during charging and display states during discharging. For example, in the above case of using four LED lamps, there are four display states in common in the charge mode, i.e., flash 1 → 1 flash → 2 flash 1 flash → 3 flash 1 flash, and six display states in common in the discharge mode, i.e., 4 flash → 3 flash → 2 light → 1 flash → all off, so that V is_th*The number of 204 may be 8 (4-1) + (6-1).

The decoding driver 220 receives the Charge _ ena 202 to decode the Charge _ code 211 or the Discharge _ code 212 received from the display code generator 210 with reference to the signal to generate a driving signal LED _ drive 221 for driving the LED lamp to display.

The structure and function of the display code generator 210 will be described in detail below with reference to fig. 3 and 4. It should be noted that, for clarity and brevity, the four LED lamps mentioned above are illustrated in fig. 3 and 4 and the related description, but it should be clear to one of ordinary skill in the art that the principles of the present disclosure can be applied to any suitable number of LED lamps, and are not limited to the four LED lamps described.

Fig. 3 shows a schematic diagram of an example display code generator 300, in accordance with an embodiment of the present disclosure. The example display code generator 300 may be, for example, the display code generator 210 described above in connection with FIG. 2.

The display code generator 300 may include, for example, a base clock signal generation module 310, a charging display code generation module 320, and a discharging display code generation module 330.

As shown, base clock signal generation module 310 receives LED display enable signal LED _ ena 303 to generate base clock signal DCLK311 when LED _ ena 303 indicates that LED display is enabled. The base clock signal generation module 310 outputs a base clock signal DCLK311 at a high frequency whenever the charging and discharging system is turned on, the base clock signal DCLK311 being supplied to a delay component DBS, which will be described later, for digital delay, so that the initial LED display can quickly detect the battery voltage for display. Subsequently, the base clock signal generation module 310 switches to output the base clock signal DCLK311 at a lower frequency so that the update of the LED display is not affected by the short-time battery voltage fluctuation that can be detected.

The charging display code generation module 320 and the discharging display code generation module 330 respectively receive the charging state signal Charge _ ena 302. The Charge display code generation module 320 is enabled when the Charge _ ena 302 indicates that the battery of the Charge-discharge system is being charged, and the discharge display code generation module 330 is enabled when the Charge _ ena 302 indicates that the battery is being discharged.

When enabled, the charging display code generation module 320 receives the detected battery voltage signal V _{bat_det}301. DCLK311 generated by base clock signal generation module 310, and preset voltage threshold signal V_{th1_chg} 304-1、V_{th2_chg}304-2 and V_{th3_chg}304-3 and generates a Charge display code Charge _ code 321 based on these signals. It should be noted that, in the above case of using four LED lamps, there are four display states in the charging mode, namely, 1 flash → 1 light 1 flash → 2 light 1 flash → 3 light 1 flash, and therefore, V is set for the charging mode in this embodiment_{th1_chg}、V_{th2_chg}And V_{th3_chg}There are three voltage thresholds, but in other embodiments, when a different number of LED lamps are used and/or when a different number of display states are defined, other numbers of voltage thresholds may be set as desired, and are not specifically limited herein.

When enabled, the discharging display code generation module 330 receives the detected battery voltage signal Vbat _ det 301, DCLK311 generated by the base clock signal generation module 310, and the preset voltage threshold signal V_{th5_dischg} 304-4、V_{th4_dischg} 304-4、V_{th3_dischg} 304-6、V_{th2_dischg}304-4 and V_{th1_dischg}304-8 and generates a Discharge display code Discharge _ code 322 based on these signals. It should be noted that, in the above case of using four LED lamps, there are six display states in the discharge mode, namely, 4 bright → 3 bright → 2 bright → 1 flash → all off, and therefore, V is set for the discharge mode in this embodiment_{th5_dischg}、V_{th4_dischg}、V_{th3_dischg}、V_{th2_dischg}And V_{th1_dischg}There are five voltage thresholds, but in other embodiments, when a different number of LED lights are used and/or when a different number of display states are defined, other numbers of voltage thresholds may be set as desired, and are not specifically limited herein.

The charging display code generation module 320 also receives Discharge _ code 322 from the discharging display code generation module 330, and likewise, the discharging display code generation module 330 also receives Charge _ code 321 from the charging display code generation module 320, so that the charging display code generation module 320 and the discharging display code generation module 330 can switch to generate a specified display code according to a predefined rule when a Charge/Discharge state switch occurs. This will be described in detail below.

The internal structures of the example charging display code generation module 400A and the example discharging display code generation module 400B are illustrated in detail in fig. 4A and 4B. The example charge display code generation module 400A may be the charge display code generation module 320 described above in connection with fig. 3, and the example discharge display code generation module 400B may be the discharge display code generation module 330 described above in connection with fig. 3.

As shown in fig. 4A, the example charging display code generation module 400A includes a plurality of juxtaposed display code bit generation units, e.g., first through third display code

bit generation units

410, 420, and 430. The number of display code bit generation units may be related to the number of predefined display states of the LED lamp during charging. For example, in the above case of using four LED lamps, there are four display states in common in the charge mode, i.e., flash 1 → flash 1 light → flash 2 light 1 flash → flash 1 light 3 light 1 flash, and therefore, 3 parallel display code

bit generation units

410, 420 and 430 are employed in this embodiment. Each display code bit generation unit generates a high level or a low level, and the high/low level is converted into, for example, a digital code (0,1) to represent one bit of a binary digit. The bits generated by the three ordered display code

bit generation units

410, 420, and 430 are arranged in order from the most significant bit to the least significant bit to form a binary code, i.e., a charging display code, which will be discussed below.

Each of the first to third display code

bit generation units

410, 420 and 430 includes a voltage detection comparator COMP, a delay component DBS, and a LATCH component LATCH, respectively.

Each COMP respectively receives the detected battery voltage signal V _{bat_det}301 and a corresponding preset voltage threshold signal V_{th1_chg} 304-1、V_{th2_chg}304-2 and V_{th3_chg}304-3. In this embodiment, the preset voltage threshold signals V are set in increasing order_{th1_chg} 304-1、V_{th2_chg}304-2 and V_{th3_chg}304-3; other arrangements may be provided in other ways to meet the requirements in other embodiments.

COMP of the first display code bit generation unit 410 will be V _{bat_det}301 and V_{th1_chg}304-1 are compared to generate a comparison signal 411, e.g., high or low. For convenience of description, the high level is represented by a binary digit 1, and the low level is represented by a binary digit 0; the reverse may also be true in practice and the principles of the present disclosure are equally applicable. The DBS of the first display code bit generation unit 410 receives the base clock signal DCLK311 (e.g., DCLK311 generated by the base clock signal generation module 310 described above in connection with fig. 3) and delays the comparison signal 411 based on the DCLK311 to generate the delayed signal 412. The LATCH of the first display code bit generation unit 410 locks the delayed signal 412 to ensure monotonicity of the charging display. The first display code bit generation unit 410 finally outputs a binary digit of 0 or 1, which represents the most significant bit of the charging display code.

COMP of the second display code bit generation unit 420 will be V _{bat_det}301 and V_{th2_chg}304-2 are compared to generate a comparison signal 421, e.g., high or low. The DBS of the second display code bit generation unit 420 receives the base clock signal DCLK311 (e.g., DCLK311 generated by the base clock signal generation module 310 described above in connection with fig. 3) and delays the comparison signal 421 based on the DCLK311 to generate a delayed signal 422. The LATCH of the second display code bit generation unit 420 locks the delayed signal 422 to ensure monotonicity of the charging display. The second display code bit generation unit 420 finally outputs a binary digit of 0 or 1, which represents the second most significant bit of the charging display code.

COMP of third display code bit generation unit 430 will be V _{bat_det}301 and V_{th3_chg}304-3 are compared to generate a comparison signal 431, e.g., high or low. The DBS of the third display code bit generation unit 430 receives the base clock signal DCLK311 (e.g., DCLK311 generated by the base clock signal generation module 310 described above in connection with fig. 3) and delays the comparison signal 431 based on the DCLK311 to generate the delayed signal 422. The LATCH of the third display code bit generation unit 430 locks the delayed signal 432 to ensure monotonicity of the charging display. The third display code bit generation unit 430 finally outputs a binary digit of 0 or 1, which represents the least significant bit of the charging display code.

Alternatively, the signal output by the preceding display code bit generation unit in the above order may be used for enabling the subsequent display code bit generation units, for example, when the output of the first display code bit generation unit 410 is 1, the functions of all the subsequent display code bit generation units are enabled (i.e., the comparing, delaying and locking operations are performed as described above), otherwise, all the subsequent display code bit generation units output 0; and so on.

The binary digits output by all the display code bit generation units are combined into a binary code, i.e., the charging display code Charge _ code 321, according to the above-mentioned order, so as to be output by the charging display code generation module 400A.

In the first to third display code

bit generation units

410, 420 and 430, COMP will detect the battery voltage (i.e., V)_{bat_det}301) The design ensures that when the detected battery voltage is disturbed for a short time (usually less than 4 seconds), the result is filtered out and is not updated to the final output signal, and the comparison signal generated by the real signal is reserved and updated to the final output signal; meanwhile, a one-way incremental change of the charging display code Charge _ code finally output by the charging display code generation module 400A, i.e., 000 → 100 → 110 → 111, is realized by LATCH, which corresponds to the display state of the LED lamp of 1 flash → 1 flash of light → 2 flash of light → 1 flash of light → 3 flash of light 1.

As shown in fig. 4B, the example discharge display code generation module 400B includes a plurality of juxtaposed display code bit generation units, e.g., first through fifth display code

bit generation units

440, 450, 460, 470, and 480. The number of display code bit generation units may be related to the number of predefined display states of the LED lamp during discharge. For example, in the above case of using four LED lamps, there are six display states in common in the discharge mode, i.e., 4 light → 3 light → 2 light → 1 flash → all off, and therefore, 5 display code

bit generation units

440, 450, 460, 470 and 480 in parallel are employed in this embodiment. Each display code bit generation unit generates a high level or a low level, and the high/low level is converted into, for example, a digital code (0,1) to represent one bit of a binary digit. The bits generated by the five ordered display code

bit generation units

440, 450, 460, 470 and 480 are arranged in order from the least significant bit to the most significant bit to form a binary code, i.e., a discharge display code, which will be discussed below.

Each of the first to fifth display code

bit generation units

440, 450, 460, 470 and 480 includes a voltage detection comparator COMP, a delay component DBS, and a LATCH component LATCH, respectively.

Each COMP respectively receives the detected battery voltage signal V _{bat_det}301 and a corresponding preset voltage threshold signal V_{th5_dischg} 304-4、V_{th4_dischg} 304-5、V_{th3_dischg} 304-6、V_{th2_dischg}304-7 and V_{th1_dischg}304-8. In this embodiment, the preset voltage threshold signals V are set in descending order_{th5_dischg} 304-4、V_{th4_dischg} 304-5、V_{th3_dischg} 304-6、V_{th2_dischg}304-7 and V_{th1_dischg}304-8; other arrangements may be provided in other ways to meet the requirements in other embodiments.

COMP of the first display code bit generation unit 440 will be V _{bat_det}301 and V_{th5_dischg}304-4 to generate a comparison signal 441, e.g., high or low. The DBS of the first display code bit generation unit 440 receives the base clock signal DCLK311 (e.g., DCLK311 generated by the base clock signal generation module 310 described above in connection with fig. 3) and delays the comparison signal 441 based on the DCLK311 to generate the delayed signal 442. The LATCH of the first display code bit generation unit 440 locks the delayed signal 442 to ensure monotonicity of the discharge display. The first display code bit generation unit 440 finally outputs a binary digit of 0 or 1, which represents the least significant bit of the discharge display code.

COMP of the second display code bit generation unit 450 will be V _{bat_det}301 and V_{th4_dischg}304-5 are compared to generate a comparison signal 451, e.g., high or low. The DBS of the second display code bit generation unit 450 receives the base clock signal DCLK311 (e.g., DCLK311 generated by the base clock signal generation module 310 described above in connection with fig. 3) and delays the comparison signal 451 based on the DCLK311 to generate a delayed signal 452. The LATCH of the second display code bit generation unit 450 locks the delayed signal 452 to ensure monotonicity of the discharge display. The second display code bit generation unit 450 finally outputs a binary digit of 0 or 1, which represents the second least significant bit of the discharge display code.

Third stepCOMP of display code bit generation unit 460 will be V _{bat_det}301 and V_{th3_dischg}304-6 are compared to generate a comparison signal 461, e.g., high or low. The DBS of the third display code bit generation unit 460 receives the base clock signal DCLK311 (e.g., DCLK311 generated by the base clock signal generation module 310 described above in connection with fig. 3) and delays the comparison signal 461 based on the DCLK311 to generate a delayed signal 462. The LATCH of the third display code bit generation unit 460 locks the delayed signal 462 to ensure monotonicity of the discharge display. The third display code bit generation unit 460 finally outputs a binary digit of 0 or 1, which represents the next valid bit of the discharge display code.

COMP of the fourth display code bit generation unit 470 divides V _{bat_det}301 and V_{th2_dischg}304-7 are compared to generate a comparison signal 471, e.g., high or low. The DBS of the fourth display code bit generation unit 470 receives the base clock signal DCLK311 (e.g., DCLK311 generated by the base clock signal generation module 310 described above in connection with fig. 3) and delays the comparison signal 471 based on the DCLK311 to generate a delayed signal 472. The LATCH of the fourth display code bit generation unit 470 locks the delayed signal 472 to ensure monotonicity of the discharge display. The fourth display code bit generation unit 470 finally outputs a binary digit of 0 or 1, which represents the second most significant bit of the discharge display code.

COMP of the fifth display code bit generation unit 480 will be V _{bat_det}301 and V_{th1_dischg}304-8 are compared to generate a comparison signal 481, e.g., high or low. The DBS of the fourth display code bit generation unit 480 receives the base clock signal DCLK311 (e.g., DCLK311 generated by the base clock signal generation module 310 described above in connection with fig. 3) and delays the comparison signal 481 based on the DCLK311 to generate the delayed signal 482. The LATCH of the fifth display code bit generation unit 480 locks the delayed signal 482 to ensure monotonicity of the discharge display. The fifth display code bit generation unit 480 finally outputs a binary digit of 0 or 1, which represents discharging displayThe most significant bit of the code.

Alternatively, the signals output by the preceding display code bit generation units in the above order may be used for enabling the subsequent display code bit generation units, for example, when the output of the first display code bit generation unit 440 is 0, the functions of all the subsequent display code bit generation units (i.e., the second to fifth display code bit generation units) are enabled (i.e., the comparison, delay and lock operations are performed as described above), otherwise, all the subsequent display code bit generation units output 1; when the output of the second display code bit generation unit 450 is also 0, the functions of all subsequent display code bit generation units (i.e., the third to fifth display code bit generation units) are enabled, otherwise, all subsequent display code bit generation units output 1; and so on.

The binary digits output by all the display code bit generation units are combined into a binary code, i.e., the Discharge display code Discharge _ code 322, according to the above-mentioned order, so as to be output by the Discharge display code generation module 400B.

In the first to fifth display code

bit generation units

440, 450, 460, 470 and 480, COMP will detect the battery voltage (i.e., V;) as a result of the detection_{bat_det}301) The design ensures that when the detected battery voltage is disturbed for a short time (usually less than 4 seconds), the result is filtered out and is not updated to the final output signal, and the comparison signal generated by the real signal is reserved and updated to the final output signal; meanwhile, a unidirectional decreasing change of the Discharge display code Discharge _ code, which is finally output by the Discharge display code generation module 400B, is realized by LATCH, i.e., 11111 → 11110 → 11100 → 11000 → 10000 → 00000, which corresponds to the display state of the LED lamp 4 bright → 3 bright → 2 bright → 1 flash → all off.

Returning to the above mentioned in connection with fig. 3, the charging display code generation module 320 also receives the Discharge _ code 322 from the discharging display code generation module 330, and likewise, the discharging display code generation module 330 also receives the Charge _ code 321 from the charging display code generation module 320, so that the charging display code generation module 320 and the discharging display code generation module 330 can switch to generate a specified display code according to a predefined rule when a Charge/Discharge state switch occurs, which is embodied in fig. 4A and 4B as:

(1) the LATCH of each of the first to third display code

bit generation units

410, 420, and 430 of the charge display code generation module 400A also receives the Discharge _ code 322 generated by the Discharge display code generation module 400B to output a specified signal, for example, a specified level or binary digit, according to the Discharge _ code 322 according to a predefined rule when the battery of the charge and Discharge system is switched from a Discharge state to a charge state;

(2) the LATCH of each of the display code

bit generation units

440, 450, 460, 470, and 480 in the discharge display code generation module 400B also receives the Charge _ code 321 generated by the Charge display code generation module 400A to output a specified signal, for example, a specified level or binary digit, according to the Charge _ code 321 according to a predefined rule when the battery of the Charge and discharge system is switched from the Charge state to the discharge state.

The mentioned "predefined rules" will be described in detail below.

Table 1 describes examples of the Charge display code Charge _ code and the Discharge display code Discharge _ code in the case where four LED lamps are used.

TABLE 1

Charging and discharging mode	LED display status	Charge_code	Discharge_code
				Charging of electricity	One flash	000	-----
Charging of electricity	One light and one flash	100	-----
				Charging of electricity	Two lights and one flash	110	-----
Charging of electricity	Three lights and one flash	111	-----
				Discharge of electricity	Four bright	---	11111
Discharge of electricity	Three bright	---	11110
				Discharge of electricity	Second bright	---	11100
Discharge of electricity	Light once	---	11000
				Discharge of electricity	One flash	---	10000
Discharge of electricity	All-round extinguishing	---	00000

Referring to fig. 4A, in the charging mode, when the detected battery voltage is less than V_{th1_chg}304-1, the first to third display code bit generation units 410, 420 and 430 all output 0, i.e. the Charge _ code is 000, and one of the 4 LED lamps flickers; when the detected battery voltage is greater than V along with the increase of the battery capacity_{th1_chg}304-1 but less than V_{th2_chg}304-2, the first display code bit generation unit 410 outputs 1, and the second and third display code bit generation units 420 and 430 output 0, the Charge _ code is 100, one LED lamp of the 4 LED lamps is on and the other LED lamp flickers; when the detected battery voltage is greater than V, the battery capacity is increased continuously_{th2_chg}304-2 but less than V_{th3_chg}304-3, the first display code bit generation unit 410 outputs 1, the second display code bit generation unit 420 also outputs 1, the third display code bit generation unit 430 outputs 0, the Charge _ code is 110, two of the 4 LED lamps are on, and the other LED lamp flickers; when the detected battery voltage is greater than V, the battery capacity is increased continuously_{th3_chg}304-3, the first display code bit generation unit 410 outputs a 1, the second display code bit generation unit 420 also outputs a 1, the third display code bit generation unit 430 also outputs a 1,the Charge _ code is 111, and three LED lamps among 4 LED lamps are lighted, and another LED lamp flickers.

Referring to FIG. 4B, in the discharging mode, when the detected battery voltage is greater than V_{th5_dischg}304-4, the first to fifth display code

bit generation units

440, 450, 460, 470 and 480 all output 1, i.e. Discharge _ code is 11111, and 4 LED lamps are all lit; when the detected battery voltage is greater than V as the battery discharges such that the detected voltage decreases_{th4_dischg}304-5 but less than V_{th5_dischg}304-4, the first display code bit generation unit 440 outputs 0, and the second to fifth display code

bit generation units

450, 460, 470 and 480 all output 1, i.e. Discharge _ code is 11110, three LED lamps among 4 LED lamps are on, and one LED lamp is off; further reduction of the detected voltage as the battery discharges when the detected battery voltage is greater than V_{th3_dischg}304-6 but less than V_{th4_dischg}304-5, the first and second display code

bit generation units

440 and 450 output 0, and the third to fifth display code

bit generation units

460, 470 and 480 all output 1, i.e. Discharge _ code is 11100, two LED lamps of 4 LED lamps are on and two LED lamps are off; further reduction of the detected voltage as the battery discharges when the detected battery voltage is greater than V_{th2_dischg}304-7 but less than V_{th3_dischg}304-6, the first to third display code

bit generation units

440, 450 and 460 output 0, and the fourth and fifth display code

bit generation units

470 and 480 output 1, i.e. Discharge _ code is 11000, one LED lamp of 4 LED lamps is on, and three LED lamps are off; further reduction of the detected voltage as the battery discharges when the detected battery voltage is greater than V_{th1_dischg}304-8 but less than V_{th2_dischg}304-7, the first to fourth display code

bit generation units

440, 450, 460 and 470 output 0, and the fifth display code bit generation unit 480 outputs 1, i.e., Discharge _ code is 10000, one of the 4 LED lamps flashes, and the rest goes out; further reduction of the detected voltage as the battery discharges when the detected battery voltage is less than V_{th1_dischg}304-8, the first through fifth display code bits are

generatedThe forming units

440, 450, 460, 470 and 480 all output 0, i.e. Discharge _ code is 00000, and 4 LED lamps are all turned off.

It should be noted that the number of the LED lamps, the display states during charging and discharging, and the corresponding display codes mentioned above are only examples, and in other embodiments, different numbers of the LED lamps, different display states during discharging, and different display codes may be set according to actual needs, and are not limited specifically herein.

Fig. 5A illustrates a schematic diagram of an example charge display state to discharge display state transition, according to an embodiment of the disclosure. Also, taking the case of using four LED lamps as an example mentioned above, when charging, the LED lamps may display the following states: flash 1 → flash 1 light 3 light, corresponding to the charging display code 000 → 100 → 110 → 111; when discharged, the possible display states of the LED lamp are as follows: 4 light → 3 light → 2 light → 1 flashing → total extinction, corresponding to the discharge display code 11111 → 11110 → 11100 → 11000 → 10000 → 00000. Referring to fig. 5A, when the charge and discharge system is switched from the charge mode to the discharge mode: when the LED lamp is in a charging display state 1 flash (000), correspondingly converting to a discharging display state 1 flash (10000); when the LED lamp is in a charging display state 1 and is lighted by 1 flash (100), correspondingly converting to a discharging display state 1 and lighting (11000); when the LED lamp is in a charging display state 2 and lightening 1 (110), correspondingly switching to a discharging display state 2 and lightening (11100); when the LED lamp is in the charging display state 3 and 1 flashes (111), the corresponding transition is made to the discharging display state 3 and lights (11110). The transcoding relationship for the charging display state to the discharging display state transition is shown below in table 2.

TABLE 2

Charging display state to discharging display state	Charging displayCode	Discharge display code
			Flash → flash 1	000	10000
1 light 1 flash → 1 light	100	11000
			2 light 1 flash → 2 light	110	11100
3 light 1 flash → 3 light	111	11110

As described above in connection with fig. 4A and 4B, when the battery of the Charge and discharge system is switched from the Charge state to the discharge state, the LATCH of each of the display code

bit generation units

440, 450, 460, 470, and 480 in the discharge display code generation module 400B also receives the Charge _ code 321 generated by the Charge display code generation module 400A to output a specified signal, for example, a specified level or binary digit, according to the Charge _ code 321 according to a predefined rule. When the battery of the Charge and discharge system is converted from the Charge state to the discharge state, for example, the Charge _ code 321 generated by the Charge display code generation module 400A is "000", the LATCH of each of the display code

bit generation units

440, 450, 460, 470, and 480 in the discharge display code generation module 400B receives the code "000" and locks to the corresponding binary digit, for example, "0", "1", according to the predefined rule shown in table 2, so that the discharge display code generation module 400B outputs the discharge display code "10000"; for example, the Charge _ code 321 generated by the Charge display code generation module 400A is "111", the LATCH of each of the display code

bit generation units

440, 450, 460, 470 and 480 in the discharge display code generation module 400B receives the code "111" and locks to the corresponding binary digits, for example, "0", "1", according to the predefined rules shown in table 2, so that the discharge display code generation module 400B outputs the discharge display code "11110"; other cases are similar and will not be described one by one here.

After the battery of the charge and discharge system completes the transition from the charge display state to the discharge display state, each of the display code

bit generation units

440, 450, 460, 470, and 480 of the discharge display code generation module 400B normally operates in its own mode to update the discharge display code. Thus, after the display state conversion is completed, the light skipping situation can not occur.

Fig. 5B illustrates a schematic diagram of an example discharge display state to charge display state transition, according to an embodiment of the disclosure. Also, in the case of using four LED lamps as an example mentioned above, when discharging, the possible display states of the LED lamps are as follows: 4 light → 3 light → 2 light → 1 flashing → total extinction; when charging, the possible display states of the LED lamp are as follows: flash 1 → flash 1 of 2 → flash 1 of 3, corresponding to the charging display code 000 → 100 → 110 → 111. Referring to fig. 5B, when the charge-discharge system is shifted from the discharge mode to the charge mode: when the LED lamp is in a discharge display state of complete extinction (00000) or 1 flash (10000), correspondingly converting to a charge display state of 1 flash (000); when the LED lamp is in a discharge display state 1 and is lighted (11000), correspondingly converting to a charge display state 1 and lightening 1 (100); when the LED lamp is in a discharge display state 2 and is lighted (11100), correspondingly converting to a charge display state 2 and is lighted 1 and flashed (110); when the LED lamp is in the discharge display state 3 and is lighted (11110) or 4 and is lighted (11111), the corresponding state is switched to the charge display state 3 and is lighted 1 and flashed (111). The transcoding relationship for the discharge display state to charge display state transition is shown below in table 3.

TABLE 3

Discharge display state to charge display state	Discharge display code	Charging display code
			All go out or 1 flash → 1 flash	00000 or 10000	000
1 light → 1 light 1 flash	11000	100
			2 light → 2 light 1 flash	11100	110
3 light or 4 light → 3 light 1 flash	11110 or 11111	111

As described above in connection with fig. 4A and 4B, when the battery of the charge and Discharge system is switched from the Discharge state to the charge state, the LATCH of each of the first to third display code

bit generation units

410, 420, and 430 of the charge display code generation module 400A also receives the Discharge _ code 322 generated by the Discharge display code generation module 400B to output a specified signal, for example, a specified level or binary digit, according to the Discharge _ code 322 in accordance with a predefined rule. When the battery of the charge and Discharge system is converted from a Discharge state to a charge state, for example, the Discharge _ code 322 "00000" or "10000" generated by the Discharge display code generation module 400B, the LATCH of each of the first to third display code

bit generation units

410, 420, and 430 of the charge display code generation module 400A receives the code "00000" or "10000" and locks to a corresponding binary digit, for example, "0", according to a predefined rule shown in table 3, so that the charge display code generation module 400A outputs the charge display code "000"; for example, Discharge _ code 322 "11110" or "11111" generated by the Discharge display code generation module 400B, the LATCH of each of the first to third display code

bit generation units

410, 420, and 430 of the charge display code generation module 400A receives the code "11110" or "11111" and locks to the corresponding binary digit, for example, "1", according to the predefined rule shown in table 3, so that the charge display code generation module 400A outputs the charge display code "111"; other cases are similar and will not be described one by one here.

After the battery of the charge and discharge system completes the conversion from the discharge display state to the charge display state, each of the display code

bit generation units

410, 420, and 430 of the charge display code generation module 400A normally operates in its own mode to update the charge display code. Thus, after the display state conversion is completed, the light skipping situation can not occur.

It should be noted that the predefined rule of the mutual conversion of the charging/discharging LED display states is shown above only for the purpose of figuratively illustrating the basic principle of the present disclosure and is not intended to limit the scope of the present disclosure, and in other embodiments, different conversion rules may be defined according to actual needs and are not specifically limited herein.

An example method 600 for LED display control in a charge and discharge system according to an embodiment of the disclosure is described below with reference to fig. 6.

The method 600 includes, at 610, basing a voltage signal (V) of a battery in a charge-discharge system_{bat_det}) And a Charge state signal (Charge _ ena), an LED display enable signal (Charge _ ena), and a plurality of preset voltagesThreshold signal (V)_th*) And generates a Charge display code (Charge _ code) or a Discharge display code (Discharge _ code). This step may be implemented by, for example, display code generator 210 shown in FIG. 2.

The method 600 further includes, at 620, decoding the Charge display code (Charge _ code) or the Discharge display code (Discharge _ code) according to the Charge state signal (Charge _ ena) to generate a driving signal (LED _ drive) for driving an LED lamp of the Charge and Discharge system to display. This step may be implemented by, for example, decode driver 220 shown in fig. 2.

The device and the method for LED display control in the charge and discharge system can achieve that the charge and discharge system is singly turned on in the charge mode and is singly turned off in the discharge mode, and lamp jumping does not occur when the charge mode and the discharge mode are mutually converted. In addition, the device and the method for controlling the LED display in the charge and discharge system provided by the embodiment of the disclosure can also enable the charge and discharge system to quickly capture the battery voltage for LED display when the charge and discharge system is started up, and are not influenced by the detectable short-time battery voltage fluctuation when the display is updated.

The present disclosure may be embodied in other specific forms without departing from its spirit or essential characteristics. For example, the algorithms described in the specific embodiments may be modified without departing from the basic spirit of the disclosure. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the disclosure being defined by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims

1. An apparatus for LED display control in a charge-discharge system, comprising:

a display code generator configured to generate a charge display code or a discharge display code based on a voltage signal and a charge state signal of a battery in the charge and discharge system, an LED display enable signal, and a plurality of preset voltage threshold signals; and

a decoding driver configured to decode the charging display code or the discharging display code according to the charging state signal to generate a driving signal for driving the LED to display.

2. The apparatus of claim 1, wherein the display code generator comprises:

a basic clock signal generating module for generating a basic clock signal based on the LED display enable signal;

a charging display code generation module for generating the charging display code based on the basic clock signal, the voltage signal, and the preset voltage threshold signal; and

a discharge display code generation module for generating the discharge display code based on the basic clock signal, the voltage signal, and the preset voltage threshold signal;

wherein whether the charging display code generation module or the discharging display code generation module is enabled depends on the charging status signal.

3. The apparatus of claim 1 or 2, wherein the charging display code is a binary code composed of a first number of bits and the discharging display code is a binary code composed of a second number of bits.

4. The apparatus of claim 3, wherein the first number and the second number are each related to a number of the LEDs.

5. The apparatus of claim 3, wherein the first number relates to a total number of states the LEDs are to display during charging and the second number relates to a total number of states the LEDs are to display during discharging.

6. The apparatus of claim 3, wherein the charging display code generation module comprises a first number of display code bit generation units, each for generating one bit of the charging display code; and the discharge display code generation module includes a second number of display code bit generation units, each for generating one bit of the discharge display code.

7. The apparatus of claim 6, wherein each of the display code bit generation cells comprises a voltage detection comparator, a delay component, and a latch component:

the voltage detection comparator is used for comparing the voltage signal with a corresponding preset voltage threshold signal to generate a comparison signal;

the delay component is to delay the comparison signal based on the base clock signal to generate a delayed signal; and is

The latch assembly is used for locking the delayed signal.

8. The apparatus of claim 7, wherein the latch assembly in each of the display code bit generation units in the charging display code generation module further receives the discharging display code from the discharging display code generation module when the charging and discharging system switches from a discharging mode to a charging mode to output a specified signal according to the discharging display code according to a predefined rule.

9. The apparatus of claim 7, wherein the latch assembly in each of the display code bit generation units in the discharging display code generation module further receives the charging display code from the charging display code generation module when the charging and discharging system switches from a charging mode to a discharging mode to output a specified signal according to the charging display code according to a predefined rule.

10. The apparatus of claim 7, wherein the preset voltage threshold corresponding to each of the first number of display code bit generation units is incremented in an order in which bits to be generated will be the most significant bit to the least significant bit of the charging display code, and the preset voltage threshold corresponding to each of the second number of display code bit generation units is decremented in an order in which bits to be generated will be the least significant bit to the most significant bit of the discharging display code.

11. The apparatus of claim 10, wherein in the charging display code generation module, when an output of the display code bit generation unit preceding in an order in which bits to be generated will be most significant bits to least significant bits of the charging display code is 1, functions of all subsequent display code bit generation units are enabled; otherwise, all subsequent display code bit generation units output 0.

12. The apparatus of claim 10, wherein in the discharge display code generation module, when a bit to be generated is to be 0 as an output of the display code bit generation unit preceding in order of a least significant bit to a most significant bit of the discharge display code, functions of all subsequent display code bit generation units are enabled; otherwise, all subsequent display code bit generation units output 1.

13. A method for LED display control in a charge-discharge system, comprising:

generating a charging display code or a discharging display code based on a voltage signal and a charging state signal of a battery in the charging and discharging system, an LED display enabling signal and a plurality of preset voltage threshold signals; and is

Decoding the charging display code or the discharging display code according to the charging state signal to generate a driving signal, wherein the driving signal is used for driving the LED to display.

14. The method of claim 13, wherein generating the charging display code or the discharging display code comprises:

when the charging state signal indicates that the charging and discharging system is in a charging mode, generating the charging display code based on a basic clock signal, the voltage signal and the preset voltage threshold signal; or

When the charging state signal indicates that the charging and discharging system is in a discharging mode, generating a discharging display code based on the basic clock signal, the voltage signal and the preset voltage threshold signal;

wherein the base clock signal is generated based on the LED display enable signal.

15. The method of claim 13 or 14, wherein the charging display code is a binary code consisting of a first number of bits and the discharging display code is a binary code consisting of a second number of bits.

16. The method of claim 15, wherein the first number relates to a total number of states the LED is to display during charging and the second number relates to a total number of states the LED is to display during discharging.

17. The method of claim 15, wherein generating the charge display code based on the base clock signal, the voltage signal, and the preset voltage threshold signal when the charge status signal indicates that the charge and discharge system is in the charge mode comprises:

sequentially generating each bit of the charging display code in an order from a most significant bit to a least significant bit by:

comparing the voltage signal with a corresponding preset voltage threshold signal to generate a comparison signal;

delay processing the comparison signal based on the base clock signal to generate a delayed signal; and is

Locking the delayed signal as the bit;

wherein the corresponding preset voltage threshold is increased progressively according to the sequence from the most significant bit to the least significant bit.

18. The method of claim 15, wherein generating the discharge display code based on the base clock signal, the voltage signal, and the preset voltage threshold signal when the charge status signal indicates that the charge and discharge system is in the discharge mode comprises:

sequentially generating each bit of the discharge display code in an order from a least significant bit to a most significant bit by:

Locking the delayed signal as the bit;

and the corresponding preset voltage threshold values are decreased in the sequence from the least significant bit to the most significant bit.

19. The method of claim 15, wherein when the charge status signal indicates that the charge and discharge system switches from a discharge mode to a charge mode, outputting a specified charge display code according to the discharge display code according to a predefined rule.

20. The method of claim 15, wherein when the charge status signal indicates that the charge and discharge system switches from a charge mode to a discharge mode, outputting a specified discharge display code according to the charge display code according to a predefined rule.