Electronic price tag

Abstract

The utility model discloses an electronic price tag which comprises a wired charging power supply interface, a wireless charging power supply interface, a lithium titanate battery and an electronic price tag main body circuit, the input end of the lithium titanate battery is connected with the wired charging power supply interface, and the output end of the lithium titanate battery is connected with the electronic price tag main body circuit; the wired charging power supply interface introduces an external power supply through a lead and transmits the electric energy of the external power supply to the lithium titanate battery; the wireless charging power supply interface is used for converting external energy into electric energy in a non-contact manner and transmitting the electric energy to the lithium titanate battery; the lithium titanate battery is used for storing electric energy and supplying power to the electronic price tag main body circuit; and the electronic price tag main body circuit is used for data processing, signaling communication and control of a display screen of the electronic price tag. According to the electronic price tag, the lithium titanate battery is adopted, deep over-discharge of the rechargeable battery of the electronic price tag is avoided under the condition that the electronic price tag is not provided with an over-discharge protection circuit, and the safety of the electronic price tag is improved.

Description

Technical Field

[0001] The utility model relates to the field of electronic technology, in particular to an electronic price tag. Background Art

[0002] This section is intended to provide a background or context to the embodiments of the utility model recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.

[0003] For rechargeable electronic price tags, the energy source for screen price change, wireless communication and other services is usually secondary batteries, usually of the type of ternary lithium, lithium manganese oxide, lithium cobalt oxide, lithium iron phosphate and other systems of secondary lithium batteries. Such batteries are sensitive to overcharge and over-discharge conditions, and overcharge and over-discharge will cause irreversible degradation of key performance of such batteries such as capacity, internal resistance, and self-discharge. In the ESL circuit of the electronic price tag, battery overcharge can be avoided by limiting the battery charging voltage, but deep over-discharge is unavoidable. Even if the price tag or battery has an over-discharge protection circuit, there are cases where the price tag is frequently used when it is not charged for a long time, causing the battery to be over-discharged and the battery voltage to drop to 0V or even below 0V. Deep over-discharge causes permanent damage and degradation of the internal materials and battery performance of the battery. At this time, the battery needs to be manually activated or replaced. While the battery performance is degraded, it also accumulates safety hazards. Utility Model Content

[0004] The embodiment of the utility model provides an electronic price tag, which is used to improve the safety of the electronic price tag and prevent the battery from being over-discharged, including: a wired charging power interface, a wireless charging power interface, a lithium titanate battery, and an electronic price tag main circuit;

[0005] The input end of the lithium titanate battery is connected to the wired charging power interface, and the output end of the lithium titanate battery is connected to the main circuit of the electronic price tag;

[0006] A wired charging power interface, used to introduce an external power source through a wire and transmit the power of the external power source to the lithium titanate battery;

[0007] A wireless charging power interface is connected to the main circuit of the electronic price tag and is used to convert external energy into electrical energy in a contactless manner and transmit it to the lithium titanate battery;

[0008] Lithium titanate battery, used to store electrical energy and power the main circuit of the electronic price tag;

[0009] The main circuit of the electronic price tag is used for data processing, signaling communication, and controlling the display screen of the electronic price tag.

[0010] In the embodiment of the utility model, the positive electrode of the lithium titanate battery adopts a lithium compound and an aluminum foil current collector, and the negative electrode of the lithium titanate battery adopts a lithium titanate compound and an aluminum foil current collector.

[0011] In the embodiment of the utility model, it also includes: an electrical isolation circuit;

[0012] The electrical isolation circuit is connected between the output end of the wired charging power interface and the main circuit of the electronic price tag, and is used to keep the circuit charged by the wireless charging power interface independent from the circuit charged by the wired charging power interface.

[0013] In the embodiment of the utility model, the wireless charging power interface adopts a near field communication NFC module.

[0014] In the embodiment of the utility model, it also includes:

[0015] The constant voltage current limiting circuit is connected between the input end of the lithium titanate battery and the wired charging power interface, and is used to control charging to be cut off when the voltage of the wired charging power is equal to the voltage of the lithium titanate battery.

[0016] In the embodiment of the utility model, it also includes: a voltage comparator and a power switch;

[0017] The output end of the lithium titanate battery is connected to the input end of the voltage comparator, and the output end of the voltage comparator is connected to the input end of the power switch;

[0018] Voltage comparator, used to control the power output or return of lithium titanate battery;

[0019] The power switch, the output end is connected to the main circuit of the electronic price tag, and is used to control the output of the lithium titanate battery.

[0020] In the embodiment of the utility model, the power switch adopts a MOS tube switch.

[0021] In an embodiment of the utility model, the main circuit of the electronic price tag includes: a controller, a display screen, and an RF radio frequency module; the controller is connected to the display screen and the RF radio frequency module respectively, the display screen is used to display the information of the electronic price tag, the RF radio frequency module is used for radio frequency communication, and the controller is used to send control instructions to the display screen and the RF radio frequency module.

[0022] In the embodiment of the utility model, the main circuit of the electronic price tag further includes: a multi-color LED, and the multi-color LED is connected to the display screen and the controller respectively.

[0023] In the embodiment of the utility model, the electronic price tag includes: a wired charging power interface, a wireless charging power interface, a lithium titanate battery, and an electronic price tag main circuit; the input end of the lithium titanate battery is connected to the wired charging power interface, and the output end of the lithium titanate battery is connected to the electronic price tag main circuit; the wired charging power interface introduces an external power source through a wire and transmits the electric energy of the external power source to the lithium titanate battery; the wireless charging power interface is used to convert external energy into electric energy in a non-contact manner and transmit it to the lithium titanate battery; the lithium titanate battery is used to store electric energy and power the electronic price tag main circuit; the electronic price tag main circuit is used for data processing, signaling communication, and controlling the display screen of the electronic price tag. Compared with the prior art, the use of lithium titanate batteries can achieve long-term use or storage of rechargeable electronic price tags even without an over-discharge protection circuit, thereby improving the safety of the electronic price tags and avoiding battery over-discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0025] Figure 1 A schematic diagram of an electronic price tag provided by the utility model;

[0026] Figure 2 A schematic diagram of an electronic price tag provided by the utility model;

[0027] Figure 3 A schematic diagram of an electronic price tag provided by the utility model;

[0028] Figure 4 A schematic diagram of the main circuit of the electronic price tag provided by the utility model;

[0029] Figure 5 This is a schematic diagram of the main circuit of the electronic price tag provided by the utility model. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiment of the utility model more clear, the embodiment of the utility model is further described in detail below in conjunction with the accompanying drawings. Here, the illustrative embodiment of the utility model and its description are used to explain the utility model, but are not used as a limitation of the utility model.

[0031] The acquisition, storage, use, and processing of data in the technical solution of this application comply with the relevant provisions of national laws and regulations.

[0032] The term "and / or" herein only describes an association relationship, indicating that three relationships may exist. For example, A and / or B may represent the following three situations: A exists alone, A and B exist at the same time, and B exists alone. In addition, the term "at least one" herein represents any combination of at least two of any one or more of a plurality of. For example, including at least one of A, B, and C may represent including any one or more elements selected from the set consisting of A, B, and C.

[0033] In the description of this specification, the terms "include", "including", "have", "contain", etc. are all open terms, which mean including but not limited to. The descriptions with reference to the terms "one embodiment", "a specific embodiment", "some embodiments", "for example", etc. mean that the specific features, structures or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. The order of steps involved in each embodiment is used to schematically illustrate the implementation of the present application, and the order of steps is not limited and can be appropriately adjusted as needed.

[0034] Figure 1 A schematic diagram of an electronic price tag provided by an embodiment of the utility model, comprising: a charging power supply interface 1, a lithium titanate battery 2, and an electronic price tag main circuit 3;

[0035] The input end of the lithium titanate battery is connected to the charging power interface, and the output end of the lithium titanate battery is connected to the main circuit of the electronic price tag;

[0036] In a possible implementation, the charging power interface is a wired charging power interface.

[0037] The wired charging power interface is used to introduce an external power source through a wire and transmit the electrical energy of the external power source to the lithium titanate battery.

[0038] In a possible implementation, the charging power interface is a wireless charging power interface.

[0039] A wireless charging power interface is connected to the main circuit of the electronic price tag and is used to convert external energy into electrical energy in a contactless manner and transmit it to the lithium titanate battery;

[0040] Lithium titanate battery, used to store electrical energy and power the main circuit of the electronic price tag;

[0041] The main circuit of the electronic price tag is used for data processing, signaling communication, and controlling the display screen of the electronic price tag.

[0042] It is necessary to explain that the lithium titanate battery is the energy storage device and power supply of the electronic price tag, storing electricity from various charging power sources to support the power consumption of electronic price tag screen updates, communications, flashing lights and other services.

[0043] In the embodiment of the utility model, the battery appearance of the lithium titanate battery includes but is not limited to a soft-pack lithium titanate battery, a cylindrical lithium titanate battery, a button-type lithium titanate battery, and the like.

[0044] In the embodiment of the utility model, the positive electrode of the lithium titanate battery adopts a lithium compound and an aluminum foil current collector, and the negative electrode of the lithium titanate battery adopts a lithium titanate compound and an aluminum foil current collector.

[0045] Lithium titanate batteries use a specific combination of positive and negative electrode materials: lithium iron phosphate compounds or lithium manganese oxide compounds as the positive electrode, lithium titanate compounds as the negative electrode, and the negative electrode uses a surface coating and internal doping formula process.

[0046] Lithium titanate batteries use a specific anti-flatulence formula electrolyte and a miniaturized packaging structure;

[0047] The structure of lithium titanate battery cells includes but is not limited to single-layer lamination, multi-layer rectangular winding, multi-layer cylindrical winding, spherical winding, etc.

[0048] In a possible implementation, the wireless charging power interface is a near field coupling interface, such as an NFC near field wireless energy coupling antenna. The wireless charging power interface uses a near field communication NFC module.

[0049] In the embodiment of the utility model, the charging power interface may be a physical power interface, or may be a radio antenna, an NFC near-field wireless energy coupling antenna, etc.

[0050] In a possible implementation, the positive electrode of the lithium titanate battery uses a lithium iron phosphate compound and an aluminum foil current collector, and the negative electrode of the lithium titanate battery uses a lithium titanate compound and an aluminum foil current collector.

[0051] In the embodiment of the utility model, the lithium titanate battery adopts the electrode surface coating and internal doping formulation process for the negative electrode.

[0052] like Figure 2 As shown, in the embodiment of the utility model, it also includes: a wireless charging power interface 4, an electrical isolation circuit 5;

[0053] A wireless charging interface is connected to the main circuit of the electronic price tag and is used to convert the electric energy of the external power source into electric energy in a contactless manner and transmit it to the lithium titanate battery;

[0054] The electrical isolation circuit is connected between the output end of the wired charging power interface and the main circuit of the electronic price tag, and is used to keep the circuit charged by the wireless charging power interface independent from the circuit charged by the wired charging power interface.

[0055] In the embodiment of the utility model, the wireless charging power interface adopts a near field communication NFC module A.

[0056] In a possible implementation, it further includes:

[0057] The constant voltage current limiting circuit 6 is connected between the input end of the lithium titanate battery and the wired charging power interface, and is used to control charging to be cut off when the voltage of the wired charging power is equal to the voltage of the lithium titanate battery.

[0058] In the embodiment of the utility model, a constant voltage current limiting device or circuit such as DCDC / LDO is used to charge the lithium titanate battery through this circuit. When the charging power supply voltage is substantially equal to the voltage of the energy storage device, the charging is naturally terminated.

[0059] In the embodiment of the utility model, there is no special battery protection circuit, and only the load output or reflux control of the battery is retained. That is, the output end of the constant voltage current limiting circuit is directly connected to the lithium titanate battery, the output end of the lithium titanate battery is connected to the voltage comparator, and the output end of the voltage comparator is connected to the power switch to control the power output or reflux of the lithium titanate battery.

[0060] When the battery voltage is lower than the preset over-discharge voltage, the voltage comparator outputs a switch enable shutdown signal, and the battery has no output or no reflux, that is, the battery does not discharge, but the external power supply can charge the battery normally.

[0061] When the battery voltage is higher than the preset over-discharge voltage, the voltage comparator outputs a switch enable conduction signal, and the battery can output or reflux normally, that is, the battery can discharge normally, and the external power supply can charge the battery normally;

[0062] The embodiment of the utility model further includes: a voltage comparator 7 .

[0063] The output end of the lithium titanate battery is connected to the input end of the voltage comparator, and the output end of the voltage comparator is connected to the input end of the power switch;

[0064] Voltage comparator, used to control the power output or return of lithium titanate battery.

[0065] like Figure 3 As shown, in the embodiment of the utility model, it also includes: a power switch 8;

[0066] The power switch, the output end is connected to the main circuit of the electronic price tag, and is used to control the output of the lithium titanate battery.

[0067] In a possible implementation manner, the power switch is a MOS tube switch.

[0068] like Figure 4 As shown, in the embodiment of the utility model, the main circuit of the electronic price tag includes: a single chip microcomputer B, a display screen C, and an RF radio frequency module D; the single chip microcomputer B is connected to the display screen C and the RF radio frequency module D respectively.

[0069] In an embodiment of the utility model, the main circuit of the electronic price tag includes: a controller, a display screen, and an RF radio frequency module; the controller is connected to the display screen and the RF radio frequency module respectively, the display screen is used to display the information of the electronic price tag, the RF radio frequency module is used for radio frequency communication, and the controller is used to send control instructions to the display screen and the RF radio frequency module.

[0070] The main circuit of the electronic price tag also includes: a multi-color LED, which is connected to the display screen and the controller respectively.

[0071] In a possible implementation, Figure 5 As shown, the main circuit of the electronic price tag includes: NFC module, controller, LED, and RF module.

[0072] The above solution, by using lithium titanate batteries and electronic price tag application circuits adapted to the voltage range of lithium titanate batteries, enables products such as rechargeable electronic price tags to be used or stored for a long time even when the over-discharge protection circuit is simplified or not. It solves the safety risks of over-discharge / deep over-discharge of energy storage devices in electronic price tag products, as well as the serious attenuation of performance such as capacity and self-discharge rate, and the inability to recover by themselves.

[0073] The main circuit of the electronic price tag includes a single-chip microcomputer controller, a display screen, a multi-color LED, NFC, an RF radio frequency module, etc.

[0074] It should be noted that in the process of using lithium titanate batteries, the main circuit of the electronic price tag collects, monitors, and reports the voltage, typical state voltage drop, open circuit voltage, power and other parameters of the lithium titanate battery for monitoring by the electronic price tag ESL itself or the ESL background system. The parameters for monitoring or reporting the battery status are as follows:

[0075] The load voltage parameter of lithium titanate battery represents the remaining power. It refers to the load voltage of lithium titanate battery measured by ESL under typical working conditions, that is, under typical load current, including the following parameters:

[0076] When the ESL is in the RF receiving or transmitting state, the output load voltage sampled by the ESL circuit;

[0077] When the ESL is in the state of updating the screen display content, the output load voltage sampled by the ESL circuit;

[0078] When the ESL is in the LED flashing state, the output load voltage sampled by the ESL circuit;

[0079] The open circuit voltage parameter of lithium titanate battery represents the remaining power. When ESL is in sleep standby state, the no-load voltage sampled by ESL circuit is reported to the background system; the background system obtains the remaining power of energy storage device according to the corresponding relationship between the preset open circuit voltage of lithium titanate battery and its power; the open circuit and load voltage difference parameter of lithium titanate battery represents the remaining power. ESL collects the voltage difference between the load voltage and no-load voltage in RF burst state and reports it to the background system; the background system obtains the remaining power of energy storage device according to the corresponding relationship between the voltage difference and the power of energy storage device under the preset RF burst characteristic current; the integral power parameter of energy storage device current over time represents the remaining power. ESL monitors internal instruction operations, and obtains the accumulated power consumption of ESL as of the current moment by integrating the current consumption generated by each instruction operation; the background system of electronic price tag or electronic price tag deducts the power consumption from the known capacity of lithium titanate battery to obtain the remaining power of ESL energy storage device.

[0080] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific embodiment of the utility model and is not intended to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. An electronic price tag, characterized in that: include: Wired charging power interface, wireless charging power interface, lithium titanate battery, electronic price tag main circuit; The input end of the lithium titanate battery is connected to the wired charging power interface, and the output end of the lithium titanate battery is connected to the main circuit of the electronic price tag; A wired charging power interface, used to introduce an external power source through a wire and transmit the power of the external power source to the lithium titanate battery; A wireless charging power interface is connected to the main circuit of the electronic price tag and is used to convert external energy into electrical energy in a contactless manner and transmit it to the lithium titanate battery; Lithium titanate battery, used to store electrical energy and power the main circuit of the electronic price tag; The main circuit of the electronic price tag is used for data processing, signaling communication, and controlling the display screen of the electronic price tag.

2. The electronic price tag according to claim 1, characterized in that: The positive electrode of the lithium titanate battery uses a lithium compound and an aluminum foil current collector, and the negative electrode of the lithium titanate battery uses a lithium titanate compound and an aluminum foil current collector.

3. The electronic price tag according to claim 1, characterized in that: Also included: an electrical isolation circuit; The electrical isolation circuit is connected between the output end of the wired charging power interface and the main circuit of the electronic price tag, and is used to keep the circuit charged by the wireless charging power interface independent from the circuit charged by the wired charging power interface.

4. The electronic price tag according to claim 1, characterized in that: The wireless charging power interface uses a near-field communication NFC module.

5. The electronic price tag according to claim 1, characterized in that: Also includes: The constant voltage current limiting circuit is connected between the input end of the lithium titanate battery and the wired charging power interface, and is used to control charging to be cut off when the voltage of the wired charging power is equal to the voltage of the lithium titanate battery.

6. The electronic price tag according to claim 1, characterized in that: Also includes: Voltage comparator and power switch; The output end of the lithium titanate battery is connected to the input end of the voltage comparator, and the output end of the voltage comparator is connected to the input end of the power switch; Voltage comparator, used to control the power output or return of lithium titanate battery; The power switch, the output end is connected to the main circuit of the electronic price tag, and is used to control the output of the lithium titanate battery.

7. The electronic price tag according to claim 6, characterized in that: The power switch uses a MOS tube switch.

8. The electronic price tag according to claim 1, characterized in that: The main circuit of the electronic price tag includes: a controller, a display screen, and an RF radio frequency module; the controller is connected to the display screen and the RF radio frequency module respectively, the display screen is used to display the information of the electronic price tag, the RF radio frequency module is used for radio frequency communication, and the controller is used to send control instructions to the display screen and the RF radio frequency module.

9. The electronic price tag according to claim 8, characterized in that: The main circuit of the electronic price tag also includes: a multi-color LED, which is connected to the display screen and the controller respectively.

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