# US 12,222,086 B2 · Emergency lighting device having charging mode switching function

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- Number: US 12,222,086 B2
- Document ID: US12222086B2
- Status: Granted
- Kind: B2
- Application number: 18/199,983
- Filed: 2023-05-22
- Published: 2024-07-18
- Granted: 2025-02-11
- Earliest claimed: 2023-01-16
- Assignees: Xiamen PVTECH Co., Ltd.
- Applicants: Xiamen PVTECH Co., Ltd.
- Inventors: Fuxing Lu; Dasheng Li
- Web page: https://patentgrep.com/patent/US12222086B2

## CPC

- F21S 9/022: {Emergency lighting devices}
- F21V 23/023: {Power supplies in a casing (F21V23/003 takes precedence)}
- F21V 23/04: the elements being switches (safety devices F21V25/00)
- H02J 7/855: {with circuits adapted for supplying loads from the battery}
- H02J 7/865: {Battery or charger load switching, e.g. concurrent charging and load supply (H02J7/50 takes precedence)}
- H02J 7/947: {in response to integrated charge or discharge current}
- F21Y 2115/10: Light-emitting diodes [LED]
- F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED

## Abstract

An emergency lighting device having charging mode switching function includes a rechargeable battery module, a light source, a driving module, a charging mode switching module and a control module. The driving module is connected to the light source and the rechargeable battery module, and connected to an external power source via an external switch. The charging mode switching module has a main input end, a first input end, a second input end and an output end. The main input end is connected to the driving module to receive the driving signal of the driving module, and the output end is connected to the rechargeable battery module. The control module is connected to the driving module, and has a first output end and a second output end. The first output end is connected to the first input end and the second output end is connected to the second input end.

## Claims

### Claim 1

An emergency lighting device having charging mode switching function, comprising:
a rechargeable battery module;
a light source;
a driving module connected to the light source and the rechargeable battery module, and connected to an external power source via an external switch;
a charging mode switching module having a main input end, a first input end, a second input end and an output end, wherein the main input end is connected to the driving module to receive a driving signal of the driving module, and the output end is connected to the rechargeable battery module; and
a control module connected to the driving module, and having a first output end and a second output end, wherein the first output end is connected to the first input end and the second output end is connected to the second input end;
wherein when the control module detects that the external switch is in an on state, the first output end is configured to output a first charging signal to the first input end, whereby the control module executes a first charging mode in order to charge the rechargeable battery module.

### Claim 2 (depends on 1)

The emergency lighting device having charging mode switching function as claimed in claim 1, wherein the light source is a light-emitting diode or a light-emitting diode array.

### Claim 3 (depends on 1)

The emergency lighting device having charging mode switching function as claimed in claim 1, wherein the external switch is a wall switch and the external power source is a utility power.

### Claim 4 (depends on 1)

The emergency lighting device having charging mode switching function as claimed in claim 1, wherein when the control module detects that the external switch is in an off state, the first output end is configured to output the first charging signal to the first input end and the second output end is configured to output a second charging signal to the second input end, whereby the control module performs a second charging module to charge the rechargeable battery module.

### Claim 5 (depends on 4)

The emergency lighting device having charging mode switching function as claimed in claim 4, wherein the first charging mode is a slow-charging mode and the second charging mode is a fast-charging mode.

### Claim 6 (depends on 4)

The emergency lighting device having charging mode switching function as claimed in claim 4, wherein the charging module switching module comprises a first charging circuit, and the first charging circuit comprises a first resistor, a second resistor, a third resistor, a first switch and a second switch, wherein a first end of the first switch is connected to the first input end via the first resistor and a second end of the first switch is grounded, wherein one end of the second resistor is connected to a third end of the first switch, another end of the second resistor is connected to a first node, and the first node is connected to the driving module, wherein a first end of the second switch is connected to a third end of the first switch, a second end of the second switch is connected to the first node and a third end of the second switch is connected to a second node, wherein one end of the third resistor is connected to the second node, another end of the third resistor is connected to a third node and the third node is connected to the rechargeable battery module.

### Claim 7 (depends on 6)

The emergency lighting device having charging mode switching function as claimed in claim 6, wherein the charging mode switching module comprises a second charging circuit, and the second charging circuit comprises a fourth resistor, a fifth resistor, a sixth resistor, a third switch and a fourth switch, wherein a first end of the third switch is connected to the second input end via the fourth resistor, a second end of the third switch is grounded and one end of the fifth resistor is connected to a third end of the third switch, wherein another end of the fifth resistor is connected to the second node, a first end of the fourth switch is connected to a third end of the third switch, a second end of the fourth switch is connected to the second node and a third end of the fourth switch is connected to one end of the sixth resistor, wherein another end of the sixth resistor is connected to the third node.

### Claim 8 (depends on 7)

The emergency lighting device having charging mode switching function as claimed in claim 7, wherein the charging mode switching module further comprises a seventh resistor, wherein one end of the seventh resistor is connected to the third node and another end of the seventh resistor is grounded.

### Claim 9 (depends on 7)

The emergency lighting device having charging mode switching function as claimed in claim 7, wherein the first switch and the third switch are bipolar junction transistors.

### Claim 10 (depends on 9)

The emergency lighting device having charging mode switching function as claimed in claim 9, wherein the second switch and the fourth switch are metal-oxide-semiconductor field-effect transistors.