CN215395058U

CN215395058U - Battery pack and electric tool

Info

Publication number: CN215395058U
Application number: CN202120806191.6U
Authority: CN
Inventors: 柳佳男; 王宏伟
Original assignee: Nanjing Chervon Industry Co Ltd
Current assignee: Nanjing Chervon Industry Co Ltd
Priority date: 2021-04-19
Filing date: 2021-04-19
Publication date: 2022-01-04
Anticipated expiration: 2031-04-19

Abstract

The utility model discloses a battery pack and an electric tool, comprising: at least one cell unit electrically connected to each other; the interface module is electrically connected with the battery cell unit; the power supply circuit is electrically connected with the battery cell unit; a battery management system in a SIP-based package, the battery management system comprising: an AFE module electrically connected to the battery pack; an MCU module electrically connected to the AFE module; the wireless communication module is point-connected to the MCU module; a memory electrically connected to the MCU module; and the power supply module is electrically connected to the power supply circuit and is used for providing power for the battery management system. The battery pack and the electric tool disclosed by the utility model have the advantages that the configuration of the battery pack is intelligentized, the miniaturization of the battery pack is realized, and the design cost is reduced.

Description

Battery pack and electric tool

Technical Field

The present disclosure relates to battery packs, and particularly to a battery pack for an electric tool.

Background

In recent years, cordless handheld electric tools are becoming more and more popular, and with the continuous development of technologies, user demands are increasing, and a battery pack adapted to the cordless handheld electric tools is also gradually configured with an intelligent function, for example, with other types of communication functions such as bluetooth and WIFI, but the complicated circuit design not only increases the power consumption and the vulnerability of the circuit, but also increases the design cost and the design difficulty.

In recent years, in order to solve the above problems, a battery management system has been disclosed in which modules such as an analog front end, a controller, and an interface module are packaged in a system module form, and an SOC package form is mainly adopted. The prior art can overcome and improve some problems, but still has a bottleneck in circuit design and cost, for example, one chip corresponds to one system, and during assembly, because the material of each packaged chip and the process of the integrated circuit thereof are different, the requirement on the assembly process is higher, and as the functions of the battery pack are more and more, the size of the system module packaged in the SOC packaging form is increased, and the development cost and the development difficulty become higher.

Therefore, how to reasonably design the battery pack so as to reduce the design cost and the design difficulty is a problem which needs to be solved urgently at present.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the utility model provides the battery pack and the electric tool, so that the battery pack configuration is intelligentized, the miniaturization of the battery pack is realized, and the design cost is reduced.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a battery pack, comprising:

at least one cell unit electrically connected to each other;

the interface module is electrically connected with the battery cell unit;

the power supply circuit is electrically connected with the battery cell unit;

a battery management system in a SIP-based package, the battery management system comprising: an AFE module electrically connected to the battery pack; an MCU module electrically connected to the AFE module; the wireless communication module is point-connected to the MCU module; a memory electrically connected to the MCU module; and the power supply module is electrically connected to the power supply circuit and is used for providing power for the battery management system.

Preferably, the AFE module includes at least one interface for acquiring performance parameters of the battery pack.

Preferably, the battery pack performance parameters include, but are not limited to, an operating voltage and an operating current of the battery pack and a temperature of the battery pack.

Preferably, the MCU module includes at least one interface for reading the performance parameters of the battery pack acquired by the AFE module.

Preferably, the MCU module comprises at least one I/O port adapted to electrically connect to an external device.

Preferably, the I/O port is electrically connected with the interface module.

Preferably, the wireless communication module comprises a bluetooth module for transmitting signals.

Preferably, the wireless communication module comprises a WIFI module for transmitting signals.

A power tool, comprising:

a tool body;

a battery pack detachably connected to the tool body;

the battery pack includes:

a housing;

at least one cell unit electrically connected to each other;

the interface module is electrically connected with the battery cell unit;

the power supply circuit is electrically connected with the battery cell unit;

Preferably, the MCU module comprises at least one I/O port adapted to be connected to an external device.

Preferably, the wireless communication module comprises a bluetooth module and a WIFI module for transmitting signals.

In a specific embodiment, the battery pack and the electric tool provided by the utility model adopt a battery management system based on SIP packaging, integrate functions of an AFE module, an MCU module, a wireless communication module, a power supply module, a peripheral circuit and the like, monitor signals of voltage, current, temperature and the like of the battery pack together, and communicate with other equipment through I/O ports of a Bluetooth module, a WIFI module or an MCU module, so that the high integration of the battery management system is realized.

Drawings

FIG. 1 is a perspective view of a power tool;

fig. 2 is a schematic diagram of one embodiment of a battery management system.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The utility model provides a battery pack and an electric tool.A battery management system based on SIP packaging is adopted to highly integrate an AFE module, an MCU module, a wireless communication module, a power supply module and required peripheral circuits into a system-level module for realizing the normal operation of the battery management system.

Fig. 1 shows an electric power tool 200 including a tool main body 2 and a battery pack 1, the battery pack 1 being detachably attachable to the tool main body 2. The battery pack 1 includes at least one battery cell unit electrically connected to each other, an interface module electrically connected to the battery cell unit, and a power supply circuit. While the present embodiments relate to power drills, it should be understood that the present application is not limited to the disclosed embodiments, but may be applied to other types of power tools, including, but not limited to, electric hammers, sanders, angle grinders, power drills, electric wrenches, electric saws.

As shown in fig. 2, the battery pack 1 further includes a battery management system 100 based on SIP package, and as one of the specific embodiments, the battery management system 100 includes a power supply module 10, an AFE module 20, an MCU module 30, a memory 40, and a wireless communication module 50.

The power supply module 10 is used to supply power to other modules and peripheral circuits in the battery management system 100. The power supply module 10 includes a power input interface 11 connected to the power circuit, and it should be noted here that the power input interface 11 is both an interface of the power supply module 10 and an external interface of the battery management system 100. The power supply module 10 has a power output interface 12 for supplying an operating voltage to the AFE module 20, the MCU module 30, the memory 40, the wireless communication module 50 and peripheral circuits (not shown).

The AFE module 20 includes a plurality of interfaces, optionally connected to a cell unit or a plurality of cell units of the battery pack 1, for sampling a plurality of parameters during the operation of the battery pack 1. As one of the specific embodiments, the interface 211 is used for sampling the voltage of the battery pack 1, the interface 212 is used for sampling the current of the battery pack 1, and the interface 213 is used for sampling the temperature of the battery pack 1. Here, the interface 211, the interface 212, and the interface 213 are not only interfaces of the AFE module 20, but also external interfaces of the battery management system 100, and the AFE module 30 is not limited to acquiring voltage, current, and operating temperature of the battery pack 1, and may be configured to acquire other performance parameters of the battery pack 1. The other interface 214 of the AFE module 20 is connected to the MCU module 30, and is used to transmit the voltage, current and temperature parameters of the battery pack 1 sampled by the

interfaces

211, 212 and 213 to the MCU module 30. The still another interface 215 of the AFE module 20 is connected to the power output interface 12 of the power supply module 10, and the power supply module 10 supplies power to the AFE module 20 to provide an operating voltage.

The MCU module 30 is used to control the operating states of the other modules within the battery management system 100. The MCU module 30 comprises an interface 301 connected to the power output interface 12 of the power supply module 10 for obtaining the operating voltage of the MCU module 30. The MCU module 30 is connected to the interface 214 of the AFE module 20 through the internal communication interface 302, and is configured to obtain the voltage, the current, and the temperature of the battery pack 1 sampled by the AFE module 30. The MCU module 30 further includes a plurality of I/O ports 31 for connecting external devices to input parameters of the battery pack 1, where it should be noted that the I/O ports 31 belong to both an interface of the MCU module 30 and an external interface of the battery management system 100, and meanwhile, the MCU module 30 is further connected to the wireless communication module 50 through the internal communication interface 303 to transmit parameters of the battery pack 1 and control an operating state of the wireless communication module 50. The MCU module 30 is also connected to the interface 401 of the memory 40 via the interface 304 for storing data. The interface 402 of the memory 40 is connected to the power output interface 12 of the power supply module 10.

The wireless communication module 50 comprises a power supply interface 501, the power supply interface 501 is connected to the power output interface 12 of the power supply module 10, and the wireless communication module 50 further comprises an interface 502 connected to the internal communication interface 303 of the MCU module 30. The wireless communication module 50 includes a bluetooth module 51 and a WIFI module 52, and the battery management system 100 implements a wireless communication function through the bluetooth module 51 and/or the WIFI module 52.

Claims

1. A battery pack, comprising:

at least one cell unit electrically connected to each other;

the interface module is electrically connected with the battery cell unit;

the power supply circuit is electrically connected with the battery cell unit;

it is characterized by also comprising:

a battery management system in a SIP-based package, the battery management system comprising:

an AFE module electrically connected to the battery pack;

an MCU module electrically connected to the AFE module;

the wireless communication module is point-connected to the MCU module;

a memory electrically connected to the MCU module;

and the power supply module is electrically connected to the power supply circuit and is used for providing power for the battery management system.

2. The battery pack according to claim 1,

the AFE module includes at least one interface for obtaining performance parameters of the battery pack.

3. The battery pack according to claim 2,

the battery pack performance parameters include, but are not limited to, the operating voltage and operating current of the battery pack and the temperature of the battery pack.

4. The battery management system of claim 1,

the MCU module comprises at least one interface for reading the performance parameters of the battery pack acquired by the AFE module.

5. The battery management system of claim 1,

the MCU module includes at least one I/O port adapted to electrically connect to an external device.

6. The battery management system of claim 1,

the I/O port is electrically connected to the interface module.

7. The battery management system of claim 1,

the wireless communication module comprises a Bluetooth module used for transmitting signals.

8. The battery management system of claim 1,

the wireless communication module comprises a WIFI module used for transmitting signals.

9. A power tool, comprising:

a tool body;

a battery pack detachably connected to the tool body;

it is characterized in that the preparation method is characterized in that,

the battery pack includes:

a housing;

at least one cell unit electrically connected to each other;

the interface module is electrically connected with the battery cell unit;

the power supply circuit is electrically connected with the battery cell unit;

an AFE module electrically connected to the battery pack;

an MCU module electrically connected to the AFE module;

the wireless communication module is point-connected to the MCU module;

a memory electrically connected to the MCU module;

10. The power tool of claim 9,

the MCU module includes at least one I/O port adapted to connect to an external device.

11. The battery management system of claim 9,

the wireless communication module comprises a Bluetooth module and a WIFI module which are used for transmitting signals.