CN218182302U

CN218182302U - Lithium battery pack charged by PD charger and cordless lithium battery tool

Info

Publication number: CN218182302U
Application number: CN202220038996.5U
Authority: CN
Inventors: 毛军; 任素云; 戴清明; 尹志明
Original assignee: Huizhou Blueway Electronic Co Ltd
Current assignee: Huizhou Blueway Electronic Co Ltd
Priority date: 2022-01-06
Filing date: 2022-01-06
Publication date: 2022-12-30
Anticipated expiration: 2032-01-06

Abstract

The utility model relates to the technical field of PD charging, in particular to a lithium battery pack charged by a PD charger and a cordless lithium battery tool, which comprises a Type-C socket, a boosting module, an MCU control module and a battery module; the Type-C socket is connected with the boosting module and the MCU control module, and the MCU control module is connected with the boosting module and the battery module; the utility model provides a pair of utilize lithium cell package and wireless lithium electric tool that PD charger charges, can effectively utilize the current PD charger to realize charging in the consumer's hand, need not additionally to purchase the charger again, realize the maximize utilization of charger, utilize the current MCU control module of lithium cell package to carry out the PD agreement simultaneously and compile, need not additionally to purchase the PD agreement chip, and charge according to the PD in the controllable characteristic of voltage and electric current and adopt one-way boost promptly the boost module scheme to charge to the product, the cost has both been saved, the cover face and the application breadth of scheme have been compromise again.

Description

Lithium battery pack charged by PD charger and cordless lithium battery tool

Technical Field

The utility model relates to a PD charges technical field, especially relates to an utilize lithium cell package and wireless lithium electric instrument that PD charger charges.

Background

At present, most cordless lithium electric tools on the market use non-standard chargers, namely, one machine has one customized charger.

A common charging method is to charge as shown in fig. 1, that is, a charging MOS transistor is disposed in a lithium battery pack, and a charger is connected to the battery pack through a DC plug to directly charge the battery pack.

In the market, especially in the mobile phone industry, a scheme of charging by using a PD is available, but a bidirectional Buck-Boost power circuit is usually used, and in addition, a professional PD fast charging protocol chip sold in the market is required to be used for handshaking and information transmission with a PD charger, referring to fig. 2, such a design implementation technology is relatively simple, but a large number of devices are required on one hand, and the price is relatively expensive on the other hand.

SUMMERY OF THE UTILITY MODEL

The charger quantity to the aforesaid existence is numerous, the device is many in the design of PD charging scheme, problem with high costs, the utility model provides an utilize the lithium cell package and the cordless lithium electric tool that the PD charger charges, can effectively utilize current PD charger to realize charging in the consumer's hand, need not additionally to purchase the charger again, realize the maximize utilization of charger, utilize the MCU control module that the lithium cell package is current to carry out PD agreement and compile simultaneously, need not additionally to purchase the PD agreement chip, and charge according to PD in the controllable characteristic of voltage and electric current and adopt one-way boost promptly the module scheme that steps up to charge the product, both saved the cost, taken into account the cover face and the application breadth of scheme again.

In order to solve the technical problem, the utility model provides a concrete scheme as follows:

a lithium battery pack charged by a PD charger comprises a Type-C socket, a boosting module, an MCU control module and a battery module;

the Type-C socket is connected with the boosting module and the MCU control module, and the MCU control module is connected with the boosting module and the battery module.

Optionally, the Type-C socket includes a VBUS pin, a CC1 pin, a CC2 pin, and a GND pin;

the VBUS pin is connected with the boosting module, the CC1 pin and the CC2 pin are respectively connected with the MCU control module, the GND pin is connected with the negative electrode of the battery module, the PD charger is connected into the battery module through a Type-C socket, the CC1 pin and the CC2 pin of the PD protocol communication line are directly connected into the MCU control module, the communication of the PD protocol is realized through the MCU control module, a professional PD communication chip is not needed, the cost is saved, and the coverage and the application range of the scheme are considered.

Optionally, the boost module includes a boost driver IC, a first switch, a second switch, and an inductor;

the boost drive IC is connected with a first switch and a second switch, the first switch is connected with the MCU control module and the inductor, the second switch is connected with the inductor, the inductor is connected with the Type-C socket, and the first switch and the second switch are conducted and cut off to be regulated and controlled through the MCU control module and the boost drive IC, so that the inductor plays a role in voltage conversion.

Optionally, the MCU control module includes an MCU controller and a charging protection device MOS transistor connected with the MCU controller, the charging protection device MOS transistor is connected with the voltage boosting module, and the charging protection device MOS transistor detects an overcurrent during charging, thereby protecting the circuit.

Optionally, the MCU control module further includes an anti-reverse diode D1, two ends of the anti-reverse diode D1 are respectively connected to the charging protection device MOS transistor Q1 and the battery module, so as to prevent the branch current from being sent backwards, and protect the circuit.

Optionally, the MCU controller is connected with a sampling resistor, the two ends of the sampling resistor are respectively connected with a Type-C socket and a battery module, the sampling resistor is used for acquiring voltage and current parameters in a circuit, the Type-C socket is used for communicating with the charger, the sampling resistor is required to output a corresponding gear, and the boosting module is required to perform boosting action.

Optionally, the MCU control module further includes an MOS transistor Q4, and the MOS transistor Q4 is connected to the charging protection device MOS transistor Q1, the voltage boosting module, and the MCU controller.

Optionally, the battery module includes group battery and the discharge unit of being connected with the group battery, the discharge unit includes discharge port and discharge protection device MOS pipe, discharge protection device MOS pipe connection discharge port, MCU control module in and the negative pole of group battery, MCU control module controls the discharge unit, can export according to the product demand, discharge protection device MOS pipe and detect overcurrent when discharging, play the guard action to the circuit.

Optionally, the battery module further comprises a fuse, one end of the fuse is connected with the positive electrode of the battery pack and the MCU control module, the other end of the fuse is connected with the discharge unit, and when the current rises to a certain height and a certain heat degree abnormally, the fuse fuses to cut off the current, so that the safe operation of the circuit is protected.

The utility model also provides a cordless lithium electric tool, above-mentioned arbitrary the lithium cell package that utilizes the PD charger to charge for cordless lithium electric tool need not the charger of collocation customization, reduces the wasting of resources of charger, realizes the maximize utilization of charger.

Compared with the prior art, the beneficial effects of the utility model reside in that: the utility model provides a pair of utilize lithium cell package and wireless lithium electric tool that PD charger charged, can effectively utilize current PD charger in the consumer's hand to realize charging, need not additionally to purchase the charger again, realize the maximize utilization of charger, utilize current MCU control module of lithium cell package to carry out the PD agreement simultaneously and compile, need not additionally to purchase the PD agreement chip, and charge according to the PD and adopt one-way boost promptly that the boost module scheme charges to the product with the controllable characteristic of electric current, the cost has both been saved, the cover face and the application breadth of scheme have been compromise again.

Drawings

Fig. 1 and 2 show a charging circuit according to the prior art.

Fig. 3 is a lithium battery pack charged by a PD charger according to an embodiment of the present invention.

Fig. 4 is a schematic diagram related to PD charging in a lithium battery pack charged by a PD charger according to an embodiment of the present invention.

Fig. 5 is a lithium battery pack charged by a PD charger according to another embodiment of the present invention.

Fig. 6 is a schematic block diagram of a cordless lithium electric tool according to an embodiment of the present invention.

Wherein, 1 is a cordless lithium electric tool; and 2 is a lithium battery pack.

Detailed Description

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention will be combined below to clearly and completely describe the technical solutions in the embodiments of the present invention. The described embodiments are illustrative of some, but not all embodiments of the invention.

Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

For example, a lithium battery pack charged by a PD charger includes a Type-C socket, a boost module, an MCU control module, and a battery module; the Type-C socket is connected with the boosting module and the MCU control module, and the MCU control module is connected with the boosting module and the battery module.

The lithium battery package and the wireless lithium electric tool that utilize the PD charger to charge that this embodiment provided, can effectively utilize current PD charger in the consumer's hand to realize charging, need not additionally to purchase the charger again, realize the maximize utilization of charger, utilize current MCU control module of lithium battery package to carry out the PD agreement simultaneously and compile, need not additionally to purchase the PD agreement chip, and charge according to the PD in voltage and the controllable characteristic of electric current and adopt one-way the boost module scheme promptly to charge the product, the cost has both been saved, the cover surface and the application breadth of scheme have been compromise again.

As shown in fig. 3 and 4, a lithium battery pack charged by a PD charger includes a Type-C socket, a boosting module, an MCU control module, and a battery module.

The Type-C socket is used for being connected with a PD charger; the boosting module is used for outputting charging current to charge the battery module; the MCU control module is used for realizing communication of a PD protocol, communicating with the PD charger, requiring the PD charger to output corresponding voltage and current parameters, requiring the boosting module to perform boosting action and adjusting charging current.

Boost module and MCU control module are connected to Type-C socket, and MCU control module connects boost module and battery module.

After the PD charger is connected into the lithium battery pack through the Type-C socket, the output of the boosting module is connected into the positive electrode of the battery module after being controlled by the MCU control module and the boosting module, and then the positive electrode of the battery module flows back to the PD charger through the negative electrode of the battery module.

After the PD charger inserts the lithium battery package through the Type-C socket, MCU control module detects battery module's voltage earlier, then know the detailed output ability of PD charger through the PDO message that the PD charges, select suitable charger voltage current parameter according to the internal logic that has set up in advance, then carry out the communication with the PD charger and require its corresponding gear of output, and require the boost module to carry out the action of stepping up, MCU control module and boost module can adjust the electric current of charging in real time at this in-process and prevent that the electric core or PD charger is damaged to the charging current is too big.

The total voltage of the battery module can continuously rise in the charging process, the MCU control module can request new higher output voltage from the PD charger again according to preset internal logic, so that the charging power is improved, and meanwhile, the voltage difference between the input and the output of the boosting module can be reduced, so that the temperature rise of a boosting power device is reduced.

When the battery module is close to full charge, the MCU control module and the boosting module can realize CV charging by continuously and actively reducing the output current of the boosting module, so that the full charge capacity of the battery module is improved.

According to the lithium battery pack charged by the PD charger, various lithium battery packs do not need to be customized, and the lithium battery pack can be charged by using the PD charger in the world standard; the communication of the PD protocol is realized by adopting a common MCU control module of the lithium battery pack, a professional PD communication chip is not needed, and the cost is effectively saved; according to the software logic of independent design, the lithium battery pack is charged by adopting a single voltage boosting scheme, the input voltage and current of the PD charger and the charging current of the lithium battery pack can be flexibly and dynamically adjusted in the charging process, high-efficiency charging is realized, and the traditional voltage boosting and reducing integrated Buck-Boost high-cost scheme in the mobile phone industry is not required.

In some embodiments, the Type-C socket includes a VBUS pin, a CC1 pin, a CC2 pin, and a GND pin.

Wherein, the boost module is connected to the VBUS pin, MCU control module is connected respectively to CC1 pin and CC2 pin, the negative pole of battery module is connected to the GND pin, the PD charger passes through Type-C socket access battery module, wherein the CC1 pin and the CC2 pin direct access MCU control module of PD agreement communication line, realize the communication of PD agreement through MCU control module, need not use professional PD communication chip, the cost has both been saved, the coverage and the application scope of scheme have been compromise again.

In some embodiments, the boost module includes a boost driver IC, a first switch, a second switch, and an inductor.

The boost drive IC is connected with the first switch and the second switch, the MCU control module and the inductor are connected with the first switch, the inductor is connected with the second switch, the Type-C socket is connected with the inductor, and the MCU control module and the boost drive IC are used for controlling the conduction and the cut-off of the first switch and the second switch, so that the inductor has the function of voltage conversion.

In this example, the first switch and the second switch both use field effect transistors, which have the characteristics of high input impedance, low noise, large dynamic range, low power consumption, easy integration, etc., wherein the first switch is a MOS transistor Q2, the second switch is a MOS transistor Q3, and the inductor is L1.

In some embodiments, the MCU control module comprises an MCU controller and a charging protection device MOS transistor connected with the MCU controller, the charging protection device MOS transistor is Q1, the charging protection device MOS transistor Q1 is connected with the voltage boosting module, and the charging protection device MOS transistor Q1 detects an overcurrent during charging, thereby protecting the circuit.

The MCU control module further comprises an anti-reverse diode D1, and two ends of the anti-reverse diode D1 are respectively connected with the charging protection device MOS tube Q1 and the battery module, so that the branch current is prevented from being sent backwards, and the circuit is protected.

In some embodiments, the anti-reverse diode D1 may be adjusted to be a MOS transistor Q4 according to the magnitude of the charging current, and the MOS transistor Q4 is connected to the charging protection device MOS transistor Q1, the boost module, and the MCU controller, as shown in fig. 5.

The MCU controller is connected with a sampling resistor, the sampling resistor is RS1, the Type-C socket and the battery module are respectively connected to the two ends of the sampling resistor RS1, the voltage and current parameters in the circuit are acquired through the sampling resistor RS1, the Type-C socket is communicated with the charger, the output of the sampling resistor RS1 is required to be corresponding, the boosting module is required to perform boosting action, and in the process, the MCU controller and the boosting module can adjust the charging current in real time to prevent the charging current from excessively damaging the electric core or the charger.

In some embodiments, the battery module comprises a battery pack and a discharge unit connected with the battery pack, and the MCU control module controls the discharge unit and can output the control signal according to the product requirement.

The discharging unit comprises a discharging port and a discharging protection device MOS tube, the discharging protection device MOS tube is Q4, the discharging protection device MOS tube Q4 is connected with the discharging port, the MCU control module and the negative electrode of the battery pack, and the discharging protection device MOS tube Q4 detects overcurrent during discharging to protect the circuit.

The battery module further comprises a fuse, one end of the fuse is connected with the positive electrode of the battery pack and the MCU control module, the other end of the fuse is connected with the discharge unit, and when the current rises to a certain height and heat abnormally, the fuse fuses to cut off the current, so that the safe operation of a circuit is protected.

The utility model also provides a cordless lithium electric tool, as shown in fig. 6, this cordless lithium electric tool 1 includes foretell lithium cell package 2 that utilizes the PD charger to charge, and this lithium cell package includes Type-C socket, boost module, MCU control module and battery module.

The Type-C socket is used for being connected with a PD charger; the boosting module is used for outputting charging current to charge the battery module; the MCU control module is used for realizing the communication of a PD protocol, communicating with the PD charger, requiring the PD charger to output corresponding voltage and current parameters, requiring the boosting module to perform boosting action and adjusting charging current.

According to the technical scheme of above-mentioned embodiment, the utility model provides a pair of utilize lithium cell package and cordless lithium electric tool that the PD charger charges, can effectively utilize current PD charger to realize charging in the consumer's hand, need not additionally to purchase the charger again, realize the maximize utilization of charger, utilize the current MCU control module of lithium cell package to carry out PD agreement simultaneously and compile, need not additionally to purchase the PD agreement chip, and charge according to the PD in the controllable characteristic of voltage and electric current and adopt one-way boost to charge to the product that the module scheme steps up promptly, the cost has both been saved, the cover face and the application breadth of scheme have been compromise again.

In the description of the present invention, it is to be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are usually placed when used, and are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element indicated must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "suspended" and the like do not imply that the components are absolutely horizontal or suspended, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the present disclosure, unless expressly stated or limited otherwise, a first feature may comprise a first and a second feature in direct contact, or the first and second features may be in contact by means of another feature not in direct contact but in between. Also, the first feature may be over, above or on the second feature including the first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.

While the invention has been described in conjunction with the specific embodiments set forth above, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the spirit and broad scope of the appended claims.

Claims

1. A lithium battery pack charged by a PD charger is characterized by comprising a Type-C socket, a boosting module, an MCU control module and a battery module;

the Type-C socket is connected with the boosting module and the MCU control module, and the MCU control module is connected with the boosting module and the battery module; the Type-C socket comprises a VBUS pin, a CC1 pin, a CC2 pin and a GND pin;

the VBUS pin is connected with the boosting module, the CC1 pin and the CC2 pin are respectively connected with the MCU control module, and the GND pin is connected with the negative electrode of the battery module.

2. The lithium battery pack charged by the PD charger according to claim 1, wherein the boost module includes a boost driver IC, a first switch, a second switch and an inductor;

the boost drive IC is connected with a first switch and a second switch, the first switch is connected with the MCU control module and the inductor, the second switch is connected with the inductor, and the inductor is connected with the Type-C socket.

3. The lithium battery pack charged by the PD charger according to claim 1, wherein the MCU control module includes an MCU controller and a charging protection device MOS tube connected with the MCU controller, and the charging protection device MOS tube is connected with the boosting module.

4. The lithium battery pack charged by the PD charger according to claim 3, wherein the MCU control module further comprises an anti-reverse diode D1, and both ends of the anti-reverse diode D1 are respectively connected with a charging protection device MOS tube Q1 and the battery module.

5. The lithium battery pack charged by the PD charger according to claim 3, wherein the MCU controller is connected with a sampling resistor, and both ends of the sampling resistor are respectively connected with a Type-C socket and the battery module.

6. The lithium battery pack charged by the PD charger according to claim 3, wherein the MCU control module further comprises an MOS transistor Q4, and the MOS transistor Q4 is connected with a charge protection device MOS transistor Q1, the boost module and the MCU controller.

7. The lithium battery pack charged by the PD charger according to claim 1, wherein the battery module includes a battery pack and a discharge unit connected to the battery pack;

the discharging unit comprises a discharging port and a discharging protection device MOS tube, and the discharging protection device MOS tube is connected with the discharging port, the MCU control module and the cathode of the battery pack.

8. The lithium battery pack charged by the PD charger as recited in claim 7, characterized in that the battery module further includes a fuse, one end of the fuse is connected with the positive electrode of the battery pack and the MCU control module, and the other end of the fuse is connected with the discharge unit.

9. A cordless lithium electric tool comprising a lithium battery pack according to any one of claims 1 to 8 charged by a PD charger.