Circulating lithium battery with temperature detection function

Abstract

The utility model relates to a kind of temperature detection function's circulating lithium battery, comprising: battery cell;TYPE-C interface;Main control circuit board, with battery cell electricity is connected, TYPE-C interface is welded on main control circuit board, main control circuit board is connected with NTC thermistor, main control circuit board is integrated with charge management IC chip and battery protection chip, charge management IC chip and battery protection chip are electrically connected by power conversion and adjustment module, power conversion and adjustment module include double N channel enhancement mode MOS tube Q1 and diode D3, the anode of Q1's drain electrode connects battery cell, the cathode of source electrode connects battery cell, gate is controlled by charge management IC chip, D3 is connected in parallel with Q1 after being connected with resistance R8 in series;Charge management IC chip has NTC foot, NTC thermistor is electrically connected with charge management IC chip by NTC foot and resistance R1, resistance R5 that is grounded is also provided between resistance R1 and NTC thermistor;Shell, battery cell, TYPE-C interface and main control circuit board are arranged in accommodating groove and are riveted with shell riveting as an organic whole.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, and in particular to a cyclic lithium battery with temperature detection function. Background Technology

[0002] Traditional household batteries are mostly disposable, causing significant pollution and environmental damage. With technological advancements, rechargeable lithium batteries have emerged, enabling repeated use, extending battery life, and becoming more environmentally friendly. However, lithium batteries generate substantial heat during charging and use; without proper monitoring and management, this can easily lead to safety hazards, while excessively low temperatures may affect charging efficiency and performance. Utility Model Content

[0003] In view of the above situation, it is necessary to propose a cyclic lithium battery with temperature detection function.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A cyclic lithium battery with temperature detection function includes:

[0006] Battery cell;

[0007] TYPE-C interface;

[0008] The main control circuit board is electrically connected to the battery cell. The TYPE-C interface is soldered onto the main control circuit board. The main control circuit board is connected to an NTC thermistor, which is integrated on the main control circuit board or attached to the battery cell. The main control circuit board integrates a charging management IC chip and a battery protection chip. The charging management IC chip and the battery protection chip are electrically connected through a power conversion and regulation module. The power conversion and regulation module includes a dual N-channel enhancement-mode MOSFET Q1 and a diode D3. The drain of Q1 is connected to the positive terminal of the battery cell, the source is connected to the negative terminal of the battery cell, and the gate is controlled by the charging management IC chip. D3 is connected in series with a resistor R8 and then in parallel with Q1. The charging management IC chip has an NTC pin. The NTC thermistor is electrically connected to the charging management IC chip through the NTC pin and the resistor R1. A grounded resistor R5 is also provided between the resistor R1 and the NTC thermistor.

[0009] The housing has a receiving groove that opens to one end. A rivet ring is provided at the open end of the housing. The battery cell, the TYPE-C interface, and the main control circuit board are disposed in the receiving groove and riveted together with the housing by the rivet ring. The housing has a socket corresponding to the TYPE-C interface.

[0010] Furthermore, the VIN, VG, NCHRG, and NSTDBY pins of the charging management IC chip are electrically connected to the TYPE-C interface.

[0011] Furthermore, the VG pin is connected to the TYPE-C interface after being connected in series with capacitor C7. After being grounded, capacitor C1 is connected between the VIN pin and capacitor C7 and the TYPE-C interface. The NCHRG pin is connected in series with LED D1 and then connected to resistor R7. The NSTDBY pin is connected in series with LED D2 and then connected to resistor R7. R7 is connected to the TYPE-C interface.

[0012] Furthermore, the VS pin of the charging management IC chip is connected to a resistor R3, the LX pin of the charging management IC chip is connected in series with an inductor L1 and then connected to R3, and the resistor R3 and the BAT pin of the charging management IC chip are connected to the power conversion and regulation module.

[0013] Furthermore, between R3 and the power conversion and regulation module, a grounded capacitor C3, a grounded capacitor C4, and a grounded transient suppression diode D4 are sequentially provided.

[0014] Furthermore, the CS pin of the battery protection chip is connected to the negative terminals of Q1 and D3, the BAT pin of the charging management IC chip, and the resistor R3 via resistor R9. The VCC pin of the battery protection chip is connected to the BST pin via capacitor C5. The VCC pin of the battery protection chip is grounded via capacitors C9 and C6. The VCC pin of the battery protection chip is connected to the positive terminals of the battery cell, Q1, and D3 via resistor R10.

[0015] Furthermore, within the housing, the bottom of the battery cell is provided with a bottom pad, and the top of the battery cell is provided with a top pad.

[0016] Furthermore, a top seat is provided inside the housing, the bottom of the top seat is open, the top of the top seat is provided with a top ring, the TYPE-C interface and the main control circuit board are disposed inside the top seat, and the side wall of the top seat is provided with a clearance hole for the TYPE-C interface to be exposed.

[0017] Furthermore, it also includes a bracket, on which the TYPE-C interface and the main control circuit board are disposed, and the bracket is assembled inside the top mount.

[0018] Furthermore, a protruding cap is soldered onto the main control circuit board, the protruding cap protruding out of the outer shell, and a face pad is provided between the rivet ring and the main control circuit board, the face pad having a through hole for the protruding cap to extend out.

[0019] The beneficial effects of this invention are as follows: This patent achieves real-time monitoring of battery temperature by adding an NTC thermistor to the rechargeable battery. The NTC thermistor has the characteristic that its resistance decreases as temperature increases, thus accurately reflecting battery temperature changes. Based on the temperature information, the charging and discharging processes of the battery are controlled. When the battery temperature exceeds the safe range, the system reduces the charging current and stops charging, or reduces the discharging current and stops discharging, to ensure safe battery use. Reasonable temperature control can reduce the rate of chemical reactions inside the battery, reduce battery wear, and thus extend battery life. Within a suitable temperature range, the battery can maintain optimal charging and discharging efficiency, thereby improving the overall performance of the battery. The main control circuit board integrates a charging management IC chip and a battery protection chip, which are connected through a power conversion and regulation module. The power conversion and regulation module is equipped with a dual N-channel enhancement-mode MOSFET Q1, which enables precise control of the charging path and power conversion. Diode D3, through its freewheeling and voltage clamping functions, ensures the safety and stability of the power conversion circuit. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the external structure of a cyclic lithium battery with temperature detection function according to an embodiment of the present invention.

[0021] Figure 2 This is an exploded structural diagram of a cyclic lithium battery with temperature detection function according to an embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram of the main control circuit board of a cyclic lithium battery with temperature detection function according to an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the circuit structure of a cyclic lithium battery with temperature detection function according to an embodiment of the present invention.

[0024] Label Explanation:

[0025] 100. Battery cell; 200. Type-C interface; 300. Main control circuit board; 310. NTC thermistor;

[0026] 320. Charging management IC chip; 330. Battery protection chip; 340. Power conversion and regulation module;

[0027] 350, convex cap; 400, outer shell; 410, receiving groove; 420, rivet ring; 430, socket;

[0028] 510, bottom pad; 520, top pad; 600, top seat; 610, top ring; 620, clearance hole;

[0029] 700, support; 800, face pad. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description of a cyclic lithium battery with temperature detection function, in conjunction with the accompanying drawings and embodiments, provides a further detailed explanation. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the scope of the utility model.

[0031] Please refer to Figures 1-4 A cyclic lithium battery with temperature detection function, comprising:

[0032] 100 cells;

[0033] TYPE-C interface 200;

[0034] The main control circuit board 300 is electrically connected to the battery cell 100. A TYPE-C interface 200 is soldered onto the main control circuit board 300. An NTC thermistor 310 is connected to the main control circuit board 300; the NTC thermistor 310 is integrated onto the main control circuit board 300 or attached to the battery cell 100. The main control circuit board 300 integrates a charging management IC chip 320 and a battery protection chip 330. The charging management IC chip 320 and the battery protection chip 330 are electrically connected through a power conversion and regulation module 340. The adjustment module 340 includes a dual N-channel enhancement-mode MOSFET Q1 and a diode D3. The drain of Q1 is connected to the positive terminal of the battery cell 100, the source is connected to the negative terminal of the battery cell 100, and the gate is controlled by the charging management IC chip 320. D3 is connected in series with resistor R8 and then in parallel with Q1. The charging management IC chip 320 has an NTC pin. The NTC thermistor 310 is electrically connected to the charging management IC chip 320 through the NTC pin and resistor R1. A grounded resistor R5 is also provided between resistor R1 and NTC thermistor 310.

[0035] The housing 400 has a receiving groove 410 that opens to one end. A rivet ring 420 is provided at the open end of the housing 400. The battery cell 100, the TYPE-C interface 200 and the main control circuit board 300 are disposed in the receiving groove 410 and are riveted to the housing 400 together by the rivet ring 420. The housing 400 is provided with a socket 430 corresponding to the TYPE-C interface 200.

[0036] This patent achieves real-time monitoring of battery temperature by adding an NTC thermistor 310 to the rechargeable battery. The NTC thermistor 310 has the characteristic that its resistance decreases as temperature increases, thus accurately reflecting battery temperature changes. Based on the temperature information, the charging and discharging processes of the battery are controlled. When the battery temperature exceeds the safe range, the system reduces the charging current and stops charging, or reduces the discharging current and stops discharging, to ensure safe battery use. Reasonable temperature control can reduce the rate of chemical reactions inside the battery, reduce battery wear, and thus extend battery life. Within a suitable temperature range, the battery can maintain optimal charging and discharging efficiency, thereby improving the overall performance of the battery. The main control circuit board 300 integrates a charging management IC chip 320 and a battery protection chip 330, which are connected through a power conversion and regulation module 340. The power conversion and regulation module 340 is equipped with a dual N-channel enhancement-mode MOSFET Q1, which enables precise control of the charging path and power conversion. Diode D3, through its freewheeling and voltage clamping functions, ensures the safety and stability of the power conversion circuit.

[0037] Furthermore, the VIN, VG, NCHRG, and NSTDBY pins of the charging management IC chip 320 are electrically connected to the TYPE-C interface 200. The VIN pin is the input power terminal, the VG pin is the internal drive clamping terminal, the NCHRG pin is the battery charging indicator terminal, and the NSTDBY pin is the battery charging completion indicator terminal.

[0038] Furthermore, the VG pin is connected in series with capacitor C7 and then to the TYPE-C interface 200. Capacitor C1 is grounded and then connected between the VIN pin and capacitor C7 and the TYPE-C interface 200. The NCHRG pin is connected in series with LED D1 and then to resistor R7. The NSTDBY pin is connected in series with LED D2 and then to resistor R7. R7 is connected to the TYPE-C interface 200. C1 is used for low-frequency filtering and ripple suppression, and C7 is used for high-frequency filtering. Together, they form a high-low frequency composite filter circuit. Typically, D1 is red and D2 is green.

[0039] Furthermore, the VS pin of the charging management IC chip 320 is connected to resistor R3, and the LX pin of the charging management IC chip 320 is connected in series with inductor L1 and then to R3. Resistor R3 and the BAT pin of the charging management IC chip 320 are connected to the power conversion and regulation module 340. L1 performs energy storage and filtering, while R3 provides current limiting protection and suppresses LC resonance.

[0040] Furthermore, between R3 and the power conversion and regulation module 340, there are grounded capacitor C3, grounded capacitor C4, and grounded transient suppression diode D4 in sequence. D4 is a fast-response "voltage guard": when the voltage across it exceeds its clamping voltage (such as "5V0" in the model corresponding to ~5V), it will instantly enter a low-resistance conduction state to clamp the voltage at a safe value and absorb surge energy.

[0041] Furthermore, the CS pin of the battery protection chip 330 is connected to the negative terminals of Q1 and D3, the BAT pin of the charging management IC chip 320, and the resistor R3 via resistor R9. The VCC pin of the battery protection chip 330 is connected to the BST pin via capacitor C5. The VCC pin of the battery protection chip 330 is grounded via capacitors C9 and C6. The VCC pin of the battery protection chip 330 is connected to the positive terminals of cell 100, Q1, and D3 via resistor R10.

[0042] Furthermore, within the housing 400, the bottom of the battery cell 100 is provided with a bottom pad 510, and the top of the battery cell 100 is provided with a top pad 520.

[0043] Furthermore, a top seat 600 is provided inside the housing 400. The bottom of the top seat 600 is open, and a top ring 610 is provided on the top of the top seat 600. The TYPE-C interface 200 and the main control circuit board 300 are disposed inside the top seat 600. The side wall of the top seat 600 is provided with a clearance hole 620 for the TYPE-C interface 200 to be exposed.

[0044] Furthermore, a bracket 700 is included, on which the TYPE-C interface 200 and the main control circuit board 300 are configured, and the bracket 700 is assembled within the top mount 600. The bracket 700 is used to protect the components of the main control circuit board 300.

[0045] Furthermore, a convex cap 350 is soldered onto the main control circuit board 300. The convex cap 350 protrudes from the outer shell 400. A face pad 800 is also provided between the rivet ring 420 and the main control circuit board 300. The face pad 800 has a through hole for the convex cap 350 to extend out.

[0046] The bracket (700) and top plate (600) are generally made of heat-resistant plastic or heat-resistant rubber. The outer shell (400) is generally made of steel, aluminum, or aluminum alloy.

[0047] Preferably, the charging management IC chip 320 uses SLM6300 (Songlang Microelectronics), with VIN as the power input terminal, VG / VGC as the internal drive clamping terminal, NCHRG as the battery charging indicator terminal, NSTDBY as the battery charging complete indicator terminal, NCE as the enable control terminal, NTC as the battery temperature detection input terminal, BAT as the battery voltage detection terminal, battery current detection terminal, GND as the ground terminal, and LX as the switch terminal.

[0048] Preferably, the battery protection chip 330 uses MXJL1001 (JL1001 series from Jisi Semiconductor). The pin 1 of the dual N-channel enhancement-mode MOSFET Q1 is G1, pin 2 is D1, pin 3 is S1, pin 4 is G2, pin 5 is D2, pin 6 is S2, pin 7 is S, pin 8 is S, and pin 9 is EP.

[0049] Pin 1 of the TYPE-C interface 200 is GND, pin 2 is TX1+, pin 3 is TX1-, pin 4 is VBUS, pin 5 is CC1, and pin 6 is D+.

[0050] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0051] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0052] In summary, this utility model provides a rechargeable lithium battery with temperature detection function. This patent achieves real-time monitoring of battery temperature by adding an NTC thermistor to the rechargeable battery. The NTC thermistor's resistance decreases as temperature increases, thus accurately reflecting battery temperature changes. Based on temperature information, the charging and discharging processes of the battery are controlled. When the battery temperature exceeds the safe range, the system reduces the charging current and stops charging, or reduces the discharging current and stops discharging, ensuring safe battery use. Reasonable temperature control can reduce the rate of internal chemical reactions in the battery, reduce battery wear, and thus extend battery life. Within a suitable temperature range, the battery can maintain optimal charging and discharging efficiency, thereby improving overall battery performance. The main control circuit board integrates a charging management IC chip and a battery protection chip, which are connected through a power conversion and regulation module. The power conversion and regulation module is equipped with a dual N-channel enhancement-mode MOSFET Q1, enabling precise control of the charging path and power conversion. Diode D3, through its freewheeling and voltage clamping functions, ensures the safety and stability of the power conversion circuit.

[0053] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A cyclic lithium battery with temperature detection function, characterized in that, include: Battery cell; TYPE-C interface; The main control circuit board is electrically connected to the battery cell. The TYPE-C interface is soldered onto the main control circuit board. The main control circuit board is connected to an NTC thermistor, which is integrated on the main control circuit board or attached to the battery cell. The main control circuit board integrates a charging management IC chip and a battery protection chip. The charging management IC chip and the battery protection chip are electrically connected through a power conversion and regulation module. The power conversion and regulation module includes a dual N-channel enhancement-mode MOSFET Q1 and a diode D3. The drain of Q1 is connected to the positive terminal of the battery cell, the source is connected to the negative terminal of the battery cell, and the gate is controlled by the charging management IC chip. D3 is connected in series with a resistor R8 and then in parallel with Q1. The charging management IC chip has an NTC pin. The NTC thermistor is electrically connected to the charging management IC chip through the NTC pin and the resistor R1. A grounded resistor R5 is also provided between the resistor R1 and the NTC thermistor. The housing has a receiving groove that opens to one end. A rivet ring is provided at the open end of the housing. The battery cell, the TYPE-C interface, and the main control circuit board are disposed in the receiving groove and riveted together with the housing by the rivet ring. The housing has a socket corresponding to the TYPE-C interface.

2. A cyclic lithium battery with temperature detection function according to claim 1, characterized in that, The VIN, VG, NCHRG, and NSTDBY pins of the charging management IC chip are electrically connected to the TYPE-C interface.

3. A cyclic lithium battery with temperature detection function according to claim 1, characterized in that, The VG pin is connected to the TYPE-C interface after being connected in series with capacitor C7. After being grounded, capacitor C1 is connected between the VIN pin and capacitor C7 and the TYPE-C interface. The NCHRG pin is connected in series with LED D1 and then connected to resistor R7. The NSTDBY pin is connected in series with LED D2 and then connected to resistor R7. R7 is connected to the TYPE-C interface.

4. A cyclic lithium battery with temperature detection function according to claim 1, characterized in that, The VS pin of the charging management IC chip is connected to resistor R3, and the LX pin of the charging management IC chip is connected to R3 after being connected in series with inductor L1. The resistor R3 and the BAT pin of the charging management IC chip are connected to the power conversion and regulation module.

5. A cyclic lithium battery with temperature detection function according to claim 1, characterized in that, Between R3 and the power conversion and regulation module, there are, in sequence, a grounded capacitor C3, a grounded capacitor C4, and a grounded transient suppression diode D4.

6. A cyclic lithium battery with temperature detection function according to claim 1, characterized in that, The CS pin of the battery protection chip is connected to the negative terminals of Q1 and D3, the BAT pin of the charging management IC chip, and resistor R3 via resistor R9. The VCC pin of the battery protection chip is connected to the BST pin via capacitor C5. The VCC pin of the battery protection chip is grounded via capacitors C9 and C6. The VCC pin of the battery protection chip is connected to the positive terminals of the battery cell, Q1, and D3 via resistor R10.

7. A cyclic lithium battery with temperature detection function according to claim 1, characterized in that, Inside the housing, the bottom of the battery cell is provided with a bottom pad, and the top of the battery cell is provided with a top pad.

8. A cyclic lithium battery with temperature detection function according to claim 7, characterized in that, A top seat is provided inside the housing. The bottom of the top seat is open and the top of the top seat is provided with a top ring. The TYPE-C interface and the main control circuit board are disposed inside the top seat. The side wall of the top seat is provided with a clearance hole for the TYPE-C interface to be exposed.

9. A cyclic lithium battery with temperature detection function according to claim 8, characterized in that, It also includes a bracket, on which the TYPE-C interface and the main control circuit board are mounted, and the bracket is assembled inside the top mount.

10. A cyclic lithium battery with temperature detection function according to claim 9, characterized in that, A protruding cap is also soldered onto the main control circuit board. The protruding cap protrudes out of the outer shell. A face pad is also provided between the rivet ring and the main control circuit board. The face pad has a through hole for the protruding cap to extend out.

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