battery

Abstract

Disclosed is a battery. The battery comprises a rechargeable core, a circuit board, and a metal sleeve housing. The rechargeable core is mounted in the metal sleeve housing by means of an opening in an upper end of the metal sleeve housing, the circuit board is disposed above the rechargeable core, and the circuit board is electrically connected to the metal sleeve housing. The circuit board comprises a substrate and a charging connection end, and the rechargeable core is electrically connected to the substrate. The metal sleeve housing is provided with a notch portion, and a USB charging seat is installed in the notch part, the USB charging base being electrically connected to the charging connection end. The substrate is provided with a charging and discharging circuit, and a temperature control element, the temperature control element being able to actively stop charging and discharging when thermal runaway occurs in a charging and discharging process. The substrate of the present utility model is provided with the temperature control element, and the temperature control element can actively stop charging and discharging when thermal runaway occurs in a charging and discharging process, thereby ensuring the safety of the battery.

Description

Battery Technical Field

[0001] The utility model relates to the field of batteries, in particular to a battery with temperature control protection. Background Art

[0002] As global awareness of environmental protection continues to increase, traditional batteries have high energy consumption and low utilization rates, and are gradually no longer suitable for modern use. New rechargeable battery products have emerged. Rechargeable batteries have the advantages of high energy, high-power discharge, and environmental protection. In recent years, they have been widely used in various portable electrical and electronic devices, such as toys, handheld devices, etc., which puts higher and higher requirements on the energy storage capacity of rechargeable batteries.

[0003] The external dimensions of rechargeable batteries in the prior art are basically the same as those of traditional battery models (AA, AA, etc.). The vast majority of these batteries are built with lithium-ion cells. For example, Chinese patent document 201310436714.2 discloses a universal rechargeable battery composed of lithium-ion cells, and Chinese patent document 201620330850.2 discloses a rechargeable battery with a smart chip for voltage identification.

[0004] However, rechargeable batteries such as those in the above-mentioned prior art are prone to heating during the charging and discharging process, and this heating phenomenon is not easily discovered by the user during use; when the battery heats up to a certain extent, thermal runaway may occur, leading to dangerous phenomena such as fire or even explosion.

[0005] Utility Model Content

[0006] In order to at least partially address the deficiencies in the prior art, the main purpose of the present invention is to provide a battery with temperature control protection.

[0007] In order to achieve the above-mentioned main purpose, the utility model provides a battery, which includes a rechargeable cell, a circuit board and a metal casing; the rechargeable cell is installed in the interior of the metal casing through the upper end opening of the metal casing, and the circuit board is arranged above the rechargeable cell, and the circuit board and the metal casing are electrically connected;

[0008] The circuit board includes a substrate and a charging connection terminal, and the rechargeable core is electrically connected to the substrate; the metal casing has a notch and a USB charging seat provided in the notch, and the USB charging seat is electrically connected to the charging connection terminal;

[0009] The substrate has a charge and discharge circuit and a temperature control element. The temperature control element can actively stop charging and discharging when thermal runaway occurs during the charging and discharging process.

[0010] According to a specific embodiment of the present invention, there is a gap between the substrate and the rechargeable core to allow the USB charging seat and the temperature control element to be installed on the lower side of the substrate.

[0011] According to a specific embodiment of the present invention, a positive electrode access terminal and a negative electrode access terminal are provided on the lower surface of the substrate, and the rechargeable cell is connected to the positive electrode access terminal through a positive electrode connection line, and the rechargeable cell is connected to the negative electrode access terminal through a negative electrode connection line.

[0012] According to a specific embodiment of the present invention, a voltage conversion protection element is provided on the lower surface of the substrate, and the voltage conversion protection element is used to convert the charge and discharge voltage of the rechargeable cell.

[0013] According to a specific embodiment of the present invention, the metal casing includes a casing body and a battery cover removably disposed on the casing body, and the battery cover is pressed onto the upper outer side of the substrate.

[0014] Furthermore, the battery cover is an insulating rubber cover.

[0015] According to a specific embodiment of the present invention, a positive output terminal and a negative output terminal are provided on the upper surface of the substrate, a positive terminal is provided on the positive output terminal, the positive terminal passes through the battery cover and protrudes to the top of the battery cover, and the negative output terminal contacts the casing body to form an electrical connection.

[0016] According to a specific embodiment of the present invention, a voltage stabilizing protection element is further provided on the upper surface of the substrate, and the voltage stabilizing protection element is used to maintain the stability of the external output voltage.

[0017] According to a specific embodiment of the present invention, a negative electrode ring is provided on the substrate, and the substrate is embedded in the negative electrode ring; wherein the negative electrode output terminal is electrically connected to the casing body through the negative electrode ring.

[0018] According to a specific embodiment of the present invention, the negative electrode collar and the casing body are tightly fitted to fix the negative electrode collar and the substrate in the casing body.

[0019] The utility model has the following beneficial effects:

[0020] The circuit board in this utility model is equipped with a charging connector and a USB charging dock. The USB charging dock is electrically connected to the charging connector and, through the baseboard, electrically connected to the rechargeable cell for charging, enabling battery reuse. Furthermore, a temperature control element is provided on the baseboard. This element actively stops charging and discharging if thermal runaway occurs during the charging and discharging process, thereby protecting the battery.

[0021] The utility model can realize thermal management of the battery, which is beneficial to improving production efficiency and reducing costs.

[0022] In order to more clearly illustrate the purpose, technical solutions and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG1 is a structural diagram of an embodiment of a battery of the present utility model;

[0024] FIG2 is a cross-sectional view of an embodiment of a battery of the present invention. DETAILED DESCRIPTION

[0025] Many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0026] As shown in Figures 1-2, the battery of the embodiment includes a rechargeable cell 10, a circuit board 20, and a metal casing 30. The rechargeable cell 10 is installed in the interior of the metal casing 30 through the upper opening of the metal casing 30. The circuit board 20 is arranged above the rechargeable cell 10 and is electrically connected to the metal casing 30.

[0027] Among them, the rechargeable core 10 is preferably a lithium-ion battery cell with a higher energy density; in other embodiments, the rechargeable core 10 can also be a sodium-ion battery cell, a nickel-metal hydride battery cell, a nickel-cadmium battery cell, a solid-state battery cell, a semi-solid-state battery cell, a water-soluble secondary battery cell, a supercapacitor battery cell, and the like; the rechargeable core 10 of the embodiment can be a soft-pack battery cell, or a steel shell battery cell, or an aluminum shell battery cell, preferably a soft-pack battery cell with an external steel shell to achieve double protection.

[0028] Continuing with Figure 2 , the circuit board 20 includes a substrate 21 and a charging connection terminal 22 . The rechargeable cell 10 is electrically connected to the substrate 21 . Specifically, the lower surface of the substrate 21 is provided with a positive electrode access terminal 211 and a negative electrode access terminal 212 . The rechargeable cell 10 is connected to the positive electrode access terminal 211 via a positive electrode connection wire 11 , and to the negative electrode access terminal 212 via a negative electrode connection wire 12 . For example, both the positive electrode connection wire 11 and the negative electrode connection wire 12 can be made of a flexible circuit board, silicone flexible wire, enameled wire, or nickel sheet, with an outer layer of insulation.

[0029] The metal casing 30 has a notch 31, where a USB charging cradle 40 is located. The USB charging cradle 40 is electrically connected to the charging connector 22, for example, by welding. Without affecting the charging effect or usage, the USB charging cradle 40 can be located anywhere on the battery, such as on the positive or negative electrode plane, or on the sidewall of the battery. Exemplarily, a gap is provided between the substrate 21 and the rechargeable cell 10 to allow the USB charging cradle 40 to be mounted on the lower side of the substrate 21. The USB charging cradle 40 can support international standard charging cradles such as Type-A, Type-B, Type-C, miniUSB, and MicroUSB.

[0030] The metal casing 30 in the embodiment includes a casing body 31 and a battery cover 32. The battery cover 32 is removably disposed on the casing body 31 and pressed onto the upper outer side of the substrate 21. The battery cover 32 is an insulating rubber cover to protect the substrate 21 and the electronic components on the substrate 21.

[0031] A positive output terminal 213 and a negative output terminal 214 are provided on the upper surface of the substrate 21. A positive terminal 215 is provided on the positive output terminal 213. The positive terminal 215 is welded to the positive output terminal 213, for example. The positive terminal 215 passes through the battery cover 32 and protrudes to the top of the battery cover 32 to form the positive electrode of the battery. The negative output terminal 214 contacts the casing body 31 to form an electrical connection, thereby forming the bottom of the casing body 31 away from the positive terminal 215 to form the negative electrode of the battery.

[0032] Furthermore, a negative electrode collar 23 is provided on the substrate 21, and the substrate 21 is embedded in the negative electrode collar 23. The negative electrode output terminal 214 is electrically connected to the casing body 31 through the negative electrode collar 23. Exemplarily, the negative electrode output terminal 214 and the negative electrode collar 23 are welded. Exemplarily, the upper end of the negative electrode collar 23 may also have a bent portion, which contacts the negative electrode output terminal 214 to establish an electrical connection, such as welding. Preferably, the negative electrode collar 23 and the casing body 31 are tightly fitted to secure the negative electrode collar 23 and the substrate 21 within the casing body 31.

[0033] The positive output terminal 213 , the negative output terminal 214 and the charging connection terminal 22 are preferably subjected to surface copper treatment or gold immersion treatment to facilitate stable connection and coordination.

[0034] In the embodiment, the substrate 21 is equipped with a charging and discharging circuit, a temperature control element 24, a voltage conversion protection element 25, and a voltage stabilization protection element 26. The temperature control element 24, for example, is a temperature-controlled NTC probe, which is located on the lower surface of the substrate 21 and can actively stop charging and discharging if thermal runaway occurs during the charging and discharging process. For example, the temperature control element 24 is set to start operating and shut down the circuit at 45°C. Because charging heat is induced by energy conversion, the battery temperature will temporarily drop after the circuit is shut down. Therefore, the temperature control element 24 is designed to charge intermittently between 45°C and 60°C, and completely stop charging when the temperature is above 60°C. Obviously, the activation temperature of the temperature control element 24 is adjustable, and can be set to start below 45°C. The complete charging stop temperature can also be set below or above 60°C. During the battery's discharge process, the temperature control element 24 can also shut down the circuit in case of thermal runaway, preventing further operation and protecting against safety hazards.

[0035] The voltage conversion protection element 25 is, for example, arranged on the lower surface of the substrate 21 to convert the charging and discharging voltage of the rechargeable cell 10; for example, taking a No. 5 battery as an example, the rechargeable cell 10 is PL13430, and the battery voltage is 3.0~4.2V. When the input voltage of the USB charging stand 40 is 5V, the voltage conversion protection element 25 is used to convert the voltage to 4.2V to charge the rechargeable cell 10. When it is charged to 4.2V or the charging current is lower than 50mA, charging is automatically stopped; during the discharge process, the voltage conversion protection element 25 is used to convert the voltage to 1.5V for discharge, which is the same as an ordinary No. 5 carbon or alkaline battery; the voltage stabilizing protection element 26 is, for example, arranged on the upper surface of the substrate 21 to maintain the stability of the external output voltage.

[0036] Although the present invention has been described above through embodiments, it should be understood that the above embodiments are only used to exemplarily describe the feasible implementation plans of the present invention and should not be interpreted as limiting the scope of protection of the present invention. That is, any replacement or change made by those skilled in the art in accordance with the present invention should also be covered by the scope of protection of the claims of the present invention.

Claims

1. A battery, characterized in that, It includes a rechargeable core, a circuit board, and a metal casing; the rechargeable core is installed into the interior of the metal casing through the upper opening of the metal casing, the circuit board is disposed above the rechargeable core, and the circuit board is electrically connected to the metal casing; The circuit board includes a substrate and a charging connection terminal, and the rechargeable core is electrically connected to the substrate; the metal casing has a notch portion and a USB charging socket disposed at the notch portion, and the USB charging socket is electrically connected to the charging connection terminal; The substrate has a charge-discharge circuit and a temperature control element, and the temperature control element can actively stop charge-discharge when thermal runaway occurs during charge-discharge.

2. The rechargeable battery according to claim 1, wherein: There is a gap between the substrate and the rechargeable core to allow the USB charging socket and the temperature control element to be installed on the lower side surface of the substrate.

3. The rechargeable battery according to claim 2, characterized in that: The lower surface of the substrate is provided with a positive electrode access terminal and a negative electrode access terminal, the rechargeable core is connected to the positive electrode access terminal through a positive electrode connecting wire, and the rechargeable core is connected to the negative electrode access terminal through a negative electrode connecting wire.

4. The rechargeable battery according to claim 2, wherein: The lower surface of the substrate is provided with a voltage conversion protection element, and the voltage conversion protection element is used to convert the charge-discharge voltage of the rechargeable core.

5. The rechargeable battery according to claim 1, characterized in that: The metal casing includes a casing body and a battery cover removably disposed on the casing body, and the battery cover is press-fitted outside above the substrate.

6. The rechargeable battery according to claim 5, wherein: The battery cover is an insulating glue cover.

7. The rechargeable battery according to claim 5, characterized in that: The upper surface of the substrate is provided with a positive electrode output terminal and a negative electrode output terminal, a positive electrode terminal is provided on the positive electrode output terminal, the positive electrode terminal penetrates through the battery cover and protrudes above the battery cover, and the negative electrode output terminal is in contact with the casing body to form an electrical connection.

8. The rechargeable battery according to claim 7, characterized in that: The upper surface of the substrate is further provided with a voltage stabilization protection element, and the voltage stabilization protection element is used to maintain the stability of the voltage output outward.

9. The rechargeable battery according to claim 7, characterized in that: A negative electrode collar is provided on the substrate, and the substrate is embedded on the negative electrode collar; wherein, the negative electrode output terminal forms an electrical connection with the casing body through the negative electrode collar.

10. The rechargeable battery according to claim 9, characterized in that: A tight fit is provided between the negative electrode collar and the casing body to fix the negative electrode collar and the substrate in the casing body.

Images