CN218648099U

CN218648099U - Battery pack

Info

Publication number: CN218648099U
Application number: CN202222834580.7U
Authority: CN
Inventors: 仲克穷; 林晓红; 李靖; 石平波; 张英东
Original assignee: Nanjing Chervon Industry Co Ltd
Current assignee: Nanjing Chervon Industry Co Ltd
Priority date: 2022-10-26
Filing date: 2022-10-26
Publication date: 2023-03-17
Anticipated expiration: 2032-10-26

Abstract

The application discloses battery package includes: a battery pack body comprising: a housing assembly; the battery cores are arranged in the shell assembly; the circuit board is positioned in the shell assembly and connected to the battery cell; an electrical terminal connected to the circuit board, the electrical terminal configured to engage a device terminal on a respective device when the battery pack is connected to the respective device; the electric terminals at least comprise a USB Type-C terminal and a metal terminal connected with the electric tool; the battery pack further includes: at least one functional accessory detachably connected to the USB Type-C terminal or the housing assembly.

Description

Battery pack

Technical Field

The application relates to an energy storage device, in particular to a battery pack.

Background

The portable electric tool can be applied to various scenes in production and life, and the rechargeable battery pack is configured to supply power to the electric tool, so that the electric tool is free from the constraint of wires, and the use of a user is more convenient.

The conventional battery pack is generally designed to match with a power interface of the power tool to supply power to the power tool, but in actual life, a user may need the battery pack to supply power to an electronic device such as a smartphone carried by the user, and in view of diversification of user requirements, the diversity of functions of the battery pack also needs to be increased on the basis of basically not changing the structure of the battery pack.

Disclosure of Invention

For solving prior art's not enough, the utility model aims to provide a good and diversified battery package of function of suitability.

In order to achieve the above object, the following technical solutions are adopted in the present application:

a battery pack, comprising: a battery pack body comprising: a housing assembly; a plurality of cells disposed within the housing assembly; a circuit board located within the housing assembly and connected to the cell; an electrical terminal connected to the circuit board, the electrical terminal configured to engage a device terminal on a respective device when the battery pack is connected to the respective device; wherein the electrical terminals include at least a USB Type-C terminal and a metal terminal connected to the power tool; the battery pack further includes: at least one functional accessory detachably connected to the USB Type-C terminal or the housing assembly.

In one embodiment, the functional accessory includes provisions to support the transfer of electrical energy through the USB Type-C terminal.

In one embodiment, the functional accessory includes: with the physical connection portion of casing subassembly physical connection and/or with the power transmission portion that USB Type-C terminal is connected.

In one embodiment, the physical connection comprises a snap-fit structure.

In one embodiment, the functional accessory includes a lighting device.

In one embodiment, the lighting device is formed with a mounting surface surrounding at least one face of the battery pack body.

In one embodiment, the power transmission part connected with the USB Type-C terminal is disposed on the inner side of the mounting surface.

In one embodiment, a light emitting assembly is disposed outside the mounting surface.

In one embodiment, the light emitting assembly comprises an LED lamp.

In one embodiment, the output power of the USB Type-C terminal is greater than 65W.

Has the advantages that: by arranging the functional accessories matched with the battery pack, the diversity of functions of the battery pack is increased.

Drawings

Fig. 1 is a perspective view of a battery pack of an embodiment;

FIG. 2 is a perspective view of another angle of a battery pack of an embodiment;

FIG. 3 is a block diagram of one embodiment of a battery pack with the upper housing removed;

FIG. 4 is a front view of one embodiment of a battery pack with a housing assembly removed;

FIG. 5 is a top view of one embodiment of a battery pack with a housing assembly removed;

fig. 6 is an exploded view of a partial structure of a battery pack of an embodiment;

FIG. 7 is a partial block diagram of a battery pack of an embodiment;

fig. 8 is a partial block diagram of a battery pack in one embodiment;

fig. 9 is a structural diagram of a functional attachment of the battery pack in one embodiment;

FIG. 10 is a block diagram of a functional attachment of the battery pack in one embodiment;

FIG. 11 is a schematic diagram of a battery management system for a battery pack in one embodiment;

fig. 12 is a schematic diagram of a battery management system of a battery pack in one embodiment.

Detailed Description

The present application will now be described more fully hereinafter with reference to the accompanying drawings, in which specific embodiments of the invention are shown.

It will be understood by those skilled in the art that in the present disclosure, the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate orientations or positional relationships based on those shown in the drawings, which are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus the above terms should not be construed as limiting the present application. It will be further understood by those within the art that relative terms (e.g., "about," "substantially," etc.) used in connection with a quantity or condition are intended to include the stated value and have the meaning dictated by the context (e.g., the terms include at least the degree of error associated with measurement of the particular value, the tolerance (e.g., manufacturing, assembly, use) associated with the particular value, etc.). Such terms should also be considered as disclosing the range defined by the absolute values of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%,5%,10%, or more) of the indicated value. Of course, numerical values that do not adopt relative terms should also be disclosed as having particular values with tolerances.

In the embodiments of the present application, the terms "include", "include" or any other variations are intended to cover non-exclusive inclusions, so that a process, a method, an article, or an apparatus including a series of elements includes not only those elements but also other elements not explicitly listed, or further includes elements inherent to such a process, a method, an article, or an apparatus. Without further limitation, an element defined by the phrases "comprising a component of' 8230; \8230;" does not exclude the presence of another like element in a process, method, article, or apparatus that comprises the element.

The invention is described in detail below with reference to the figures and the embodiments.

In the embodiment of the application, the battery pack is used as an energy storage device which can store electric energy to supply power for the electric tool and also supply power for other household electronic equipment. In this embodiment, the electronic tool may comprise a hand-held power tool, such as a drill, an angle grinder, a sander, a chainsaw, a blower, or the like. The household electronic equipment can be, for example, lamps, mosquito killing equipment, fans, mobile phones, computers and other household electric equipment.

As shown in fig. 1 to 4, the battery pack 100 may include a battery pack body 10 and a functional accessory 22. Wherein the battery pack body 10 has a housing assembly 11 capable of accommodating a plurality of battery cells 12. In the present embodiment, the housing assembly 11 may include an upper housing 111 and a lower housing 112 as shown in fig. 4. The plurality of battery cells 12 in the casing assembly 11 may have various connection manners, for example, when the plurality of battery cells 12 in the battery pack main body 10 form a serial battery pack, the battery pack 100 is a 1P pack; when the plurality of battery cells 12 are connected in parallel two by two to form a string of battery cell groups, the battery pack 100 is a 2P pack; when a plurality of electric cores 12 are connected in parallel to form a series of electric core groups, the battery pack 100 is a 3P pack. A circuit board 13 is further accommodated in the housing assembly 11, the circuit board 13 is electrically connected to the electric core 12, and a parameter acquisition device (not shown) for acquiring parameters of the electric core 12, a control unit for controlling charging and discharging of the electric core 12, and the like may be further disposed on the circuit board 13.

The battery pack body 10 also includes at least two electrical terminals 14. Electrical terminals 14 are electrically connected to circuit board 13 and electrical terminals 14 are capable of engaging device terminals on a corresponding device when battery pack 10 is connected to the corresponding device. Corresponding devices may include power tools and other household appliances. In the present embodiment, the electrical terminal 14 can output electrical energy to an external electrical device, and also can input electrical energy to charge the battery cell 12.

In the present embodiment, the electrical terminals 14 may include a metal terminal 141 and a USB Type-C terminal 142. The metal terminals 141 may also be referred to as metal pins of the battery pack 100. Generally, the metal terminals 141 may include at least a positive connection tab 141a and a negative connection tab 141b that are adapted to be coupled to corresponding tool terminals on the power tool for outputting power to the tool. In one embodiment, the metal terminals 141 can further include communication connection tabs 141c that can mate with communication terminals on a corresponding power tool to transmit communication data between the battery pack 100 and the power tool. As shown in fig. 3, a terminal base 1411 is provided on the circuit board 13 to fix the metal terminal 141. The terminal base 1411 is provided with an electrically isolated barrier 1412, which can ensure a certain creepage distance between the metal terminals 141. In some embodiments, the housing assembly 11 is provided with a first opening 110 as shown in FIG. 1. The corresponding electrical terminal of the device or electronic equipment or power tool powered by the battery pack 100 can be engaged with the metal terminal 141 through the first opening 110. In the present embodiment, the first opening 110 may be provided at the upper end of the battery pack body 10. In other embodiments, the first opening 110 may also be provided at the lower end, front end, rear end, left end or right end of the battery pack body 10. In the present embodiment, the corresponding electrical terminals of the device or electronic equipment or power tool that is powered by the battery pack 100 may be referred to as tool terminals or device terminals or equipment terminals.

The USB Type-C terminal 142 may be a standard Type-C interface coupled to the electrical core 12 via a USB communication protocol controller (not shown). In this embodiment, the USB Type-C terminal 142 may support a USB power transmission specification implemented on the USB Type-C interface, for example, the following USB protocol can be supported: USB2.0, USB3.1, USB3.2, USB4. In some embodiments, the USB power transfer specification implemented on the USB Type-C interface may also support the USB PD protocol. In the embodiment, the output power of the USB Type-C terminal 142 is greater than 65W, and may be 70w,75w,80w, 100w, and the like. In one embodiment, the output power of the USB Type-C terminal 142 is substantially 100W.

In the present embodiment, the USB Type-C terminal 142 is provided at the front end of the battery pack body 10. As shown in fig. 1 to 4, at least a portion of the USB Type-C terminal 142 is exposed at the front side of the upper case 111. In one embodiment, the USB Type-C terminals 142 are disposed on the back side of the circuit board 13.

In some embodiments, to prevent the USB Type-C terminal 142 from being exposed outside the housing assembly 11, the USB Type-C terminal dust cover 1421 may be further disposed. Type-C terminal shield 1421 can swing joint on housing assembly 11, can expose or not expose USB Type-C terminal 142 as required by the user.

As shown in fig. 7 and 8, the battery pack body 10 further includes a battery switch member 15 configured to be activated by a user to turn on the charge/discharge function of the USB Type-C terminal 142, or the charge/discharge function of the metal terminal 141, or both. In this embodiment, a power indicator 17 is further disposed on the circuit board 13, and can indicate the power of the battery pack 100. In order to guide the light of the charge level indicator lamp 17 out of the battery pack 100 to be viewed by the user, the battery pack body 10 further includes a light guide bar 16. The light guide bar 16 is at least partially exposed outside the housing assembly 11 and at least partially adjacent to the power indicator light 17. In this embodiment, the battery switch 15 and the light guide bar 16 are integrally formed and are provided at the front end of the battery pack main body 10. For example, the battery switch 15 and the light guide bar 16 are exposed at the lower side of the USB Type-C terminal 142. In one embodiment, the battery switch member 15 can also serve as a power display member, which can display the power of the battery pack 100 when the battery switch member 15 is triggered. In this embodiment, by integrating the functions of the battery switch 15 and the light guide bar 16 into one part, the USB Type-C terminal 142 can be activated to discharge by operating the battery switch 15, the power information of the battery pack 100 can also be checked, and the number of components in the battery pack 100 is reduced.

In this embodiment, the outer end of the battery switch member 15 is further provided with a key 151 for the user to identify the battery switch member 15. Generally, the keys 151 are made of soft silicone, so that the user can feel comfortable and can also play a role in dust prevention.

In one embodiment, the battery switch member 15 and the light guide bar 16 have certain light transmittance, and in order to prevent the battery switch member 15 from being mistaken for the light guide bar 16, a light shielding soft pad is provided at the front end of the battery switch member 15, so that the user can distinguish the power display bar from the switch member.

As shown in fig. 1 to 6, the battery pack body 10 is further provided with a lock mechanism 18. The locking mechanism 18 is provided to fix the battery pack body 10 to a corresponding device. In the embodiment, at least part of the locking mechanism 18 is located on the circuit board 13, and most part of the locking mechanism 18 is located on the circuit board 13, so that the compactness of the whole structure can be ensured. In the present embodiment, the locking mechanism 18 may include the pressing portion 181 and the locking portion 182. Wherein, the pressing part 181 and the locking part 182 are exposed outside the upper housing 111, the pressing part 181 can be pressed by the hand of the user, and the locking part 182 is substantially wedge-shaped. When the battery pack 100 is mounted to the power tool, the locking portion 182 can be fixed to a holding portion in the tool to thereby fix the battery pack 100 to the power tool, and when the user operates the pressing portion 181, the locking portion 182 can be unlocked from the holding portion in the tool so that the battery pack 100 can be detached from the power tool.

In this embodiment, the circuit board 13 is provided with a power component 19 for providing power to the USB Type-C terminal 142. Because the output power of USB Type-C terminal 142 is great, generally is greater than 65W, and power components and parts 19's volume is also great. In order not to increase the volume of the battery pack main body 10, the embodiment of the present application has strict requirements on the position of the power component 19 on the circuit board 13.

In one embodiment, the power component 19 is disposed on the circuit board 13 between the terminal block 1411 and the locking mechanism 18, and the remaining space on the circuit board 13 can be fully utilized without increasing the volume of the battery pack main body 10. The power component 19, the terminal block 1411, and the locking mechanism 18 are located on the same surface of the circuit board 13, and are generally disposed on the front surface or the upper surface of the circuit board 13, that is, the surface facing away from the battery cell 12. In this embodiment, the power component 19 may be a capacitor or an inductor.

In one embodiment, the distance from the inner surface of the upper casing 111 facing the power component 19 to the circuit board 13 is greater than or equal to 12mm and less than or equal to 15mm, and may be, for example, 12mm,13mm,14mm,15mm, or the like.

In one embodiment, the power component 19 is disposed on the circuit board 13 in a space where the terminal base 1411 and the locking mechanism 18 face each other. It is understood that, as shown in fig. 5, the projection of the terminal block 1411 on the plane of the circuit board 13 is L1 in extension of the first direction a, and the projection of the locking mechanism 18 on the plane of the circuit board 13 is L2 in extension of the first direction a. The width of the projection of the power component 19 on the plane of the circuit board 13 does not exceed L1 or L2. In the present embodiment, the height of the power component 19 does not exceed the height of the terminal base 1411 and the lock mechanism 18.

In the present embodiment, when the battery pack 100 is 1P, the overall height of the battery pack body 10 is less than 48mm, and may be, for example, 47mm,46mm, or 45 mm.

In one embodiment, when the battery pack 100 is 2P, the overall height of the battery pack body 10 is less than or equal to 67mm, which may be 67mm,66mm, or 65mm, for example.

In one embodiment, when the battery pack 100 is 3P, the overall height of the battery pack body 10 is less than or equal to 85mm, for example, 85mm,84mm, 83mm, or the like.

When the battery pack 100 is not provided with the functional accessories 22, the battery pack main body 10 is the battery pack 100, and the height of the battery pack main body 10 is the height of the battery pack 100.

In the present embodiment, a spacer 20 capable of supporting the lock mechanism 18 is provided between the lock mechanism 18 and the circuit board 13. That is to say, the locking mechanism 18 and the circuit board 13 may not be in direct contact with each other, which can prevent the frequent operation of the locking mechanism 18 by the user from affecting the connection stability of the electronic components on the circuit board 13, and ensure the service life of the circuit board 13. In one embodiment, the cushion member 20 is fixed to the upper case 111, and an elastic member (not shown) is provided between the cushion member 20 and the locking mechanism 18, and the elastic member can be deformed when the pressing portion 181 is operated, ensuring that the locking mechanism 18 locks or releases the battery pack 100 to or from the power tool.

In the present embodiment, the width of the cushion member 20 in extension of the first direction a is larger than the width of the circuit board 13 in the first direction. At least one end of the cushion member 20 is at least partially exposed outside the case assembly 11, and the user can directly observe the presence of the cushion member 20 from outside the battery pack main body 10. In the present embodiment, both ends of the cushion member 20 are symmetrically exposed to both sides of the battery pack 10.

In the present embodiment, the circuit board 13 is further provided with a terminal indicator light 21 capable of indicating a connection state of at least one electrical terminal, for example, whether the USB Type-C terminal 142 is connected to an electronic device or whether only the metal terminal 141 is connected to an electric tool or the like. In one embodiment, the terminal indicator light 21 may be an LED light electrically connected to the circuit board 13, or other light emitting elements capable of emitting light. In one embodiment, the portion of the USB Type-C terminal 142 exposed outside the housing assembly 11 is located on the front side of the terminal indicator light 21.

Since the terminal indicator lamp 21 is disposed on the circuit board 13 within the housing assembly 11, light emitted from the terminal indicator lamp 21 is not easily transmitted to the outside. In the present embodiment, the terminal indicator lamp 21 may be provided on the circuit board 13 below the cushion member 20, and the cushion member 20 may be provided as a light-transmitting member, so that light of the terminal indicator lamp 21 can be led out to the outside. In one embodiment, the padding member 20 may be a transparent plastic member or a light-transmissive member of another material. In one embodiment, the padding member 20 is at least partially light transmissive, such as at least the portion exposed outside the housing assembly 11.

As shown in fig. 9, the battery pack 100 may further include at least one functional accessory 22. The functional accessories 22 can be detachably attached to the battery pack main body 10. It is possible to provide some convenient auxiliary functions to the battery pack main body 10 when needed and to remove the battery pack main body 10 when not needed, thereby reducing the weight of the battery pack 100. In one embodiment, the functional accessory 22 may include provisions to support the transfer of power through the USB Type-C terminal 142, which may be a power transfer portion (not shown) capable of transferring power. In one embodiment, the functional accessory 22 may further include a physical connection portion (not shown) capable of physically connecting with the housing assembly 11, and correspondingly, the housing assembly 11 is provided with a matching portion 1111 connecting with the physical connection portion. In one embodiment, the physical connection may include a snap-fit structure capable of snap-fitting with the mating portion 1111. In other embodiments, the physical connection may be a screw connection, a plug connection, or other structural connection.

In one embodiment, as shown in fig. 9, the functional accessory 22 may be a device holder 221 having a support portion capable of supporting other electronic devices powered by the battery pack 100. For example, like a mobile phone holder, the mobile phone can be detachably mounted on the battery pack body 10, and the mobile phone can be placed on the holder while being charged by the battery pack 100 through the Type-C port, so as to be used by a user. In one embodiment, the functional accessory 22 may also be a hanger or the like that hangs the battery pack body 10. In the present embodiment, the equipment stand 221 does not include a power transmission portion. In one embodiment, the device holder 221 may be provided with a slide rail 2211 that mates with a slide slot (not shown) on the upper housing 111 of the battery pack 100 to slide into place on the battery pack 100. In this embodiment, the support 2212 on the device holder 221 can be used to hold an electric device such as a mobile phone, and can also be used as a hook to hang the battery pack 100. In this embodiment, the device holder 221 further has a second opening 2213, which can be fixed to the battery pack 100 or removed from the battery pack 100 in cooperation with the locking mechanism 18.

In one embodiment, the functional accessory 22 can include a power transmission portion that can be electrically connected to the USB Type-C terminal 142 in addition to a physical connection portion that can be physically connected to the housing assembly 11. That is, the functional accessories 22 are fixed to the battery pack body 10 by the physical connection structure while being operated by being supplied with power from the USB Type-C terminal 142. As in fig. 10 the functional accessory 22 may be a lighting device 222. In one embodiment, the lighting device 222 may be formed with a mounting surface surrounding at least one face of the battery pack body 10. The inboard of this installation face can be equipped with the electric energy transmission portion that can be connected with USB Type-C terminal 142 electricity, and this electric energy transmission portion can just be connected with USB Type-C terminal 142, and be equipped with intermediate junction line between this electric energy transmission portion and the USB Type-C terminal 142 promptly for lighting apparatus 222 is connected the back with battery package main part 10 electricity, and the gap between the two is less or seamless, realizes the battery package 100 of an outward appearance basic integral Type. In this embodiment, the light emitting assembly 2221 may be disposed on the outer side of the mounting surface, and the light emitting assembly 2221 may be one or more lamp arrays formed by LED lamps.

In some embodiments, the functional accessory 22 may also be a fan accessory or the like.

In one embodiment, as shown in fig. 11, the charge/discharge management system in the battery pack 100 includes a single control unit 30, and the control unit 30 can perform power control on the USB Type-C terminal 142 side and can also perform charge/discharge control on the metal terminal 141 side. That is, the control unit 30 integrates at least a control module for controlling charging and discharging of the Type-C terminal, and a control module for controlling charging and discharging of the metal terminal 141. In this embodiment, the control unit 30 is connected to a voltage sampling unit 31, and the voltage sampling unit 31 can collect the voltage of a single battery cell 12. The control unit 30 may control the USB Type-C terminal 142 to charge or discharge or stop working according to the voltage of the single battery cell 12, and may also control the metal terminal 141 to charge or discharge or stop transmitting electric energy. In one embodiment, the voltage sampling unit 31 may be integrated in the control unit 30, that is, the control unit 30 itself may collect the voltage of a single battery cell 12. In one embodiment, the voltages of the battery cells 12 are different, the control strategies are different, and when the minimum single-node voltage of the battery cell 12 is smaller than the first threshold voltage, the control unit 30 prohibits the USB Type-C terminal 142 or the metal terminal 141 from charging or discharging the battery cell 12. When the minimum single-section voltage of the battery cell 12 is greater than or equal to the first threshold voltage and less than the second threshold voltage, the control unit 30 allows the USB Type-C terminal 142 or the metal terminal 141 to charge the battery cell 12 but prohibits the USB Type-C terminal 142 or the metal terminal 141 from discharging the battery cell 12. When the minimum single-section voltage of the battery cell 12 is greater than or equal to the second threshold voltage and less than the third threshold voltage, the control unit 30 allows the USB Type-C terminal 142 or the metal terminal 141 to charge or discharge the battery cell 12. When the minimum single-section voltage of the battery cell 12 is greater than or equal to the third threshold voltage, the control unit 30 allows the USB Type-C terminal 142 or the metal terminal 141 to discharge the battery cell 12 but prohibits the USB Type-C terminal 142 or the metal terminal 141 from charging the battery cell 12. Typically, the first, second and third threshold voltages are related such that the first threshold voltage is less than the second threshold voltage and less than the third threshold voltage. In one embodiment, the temperature of the cells 12 is different and the charge control strategy is different. When the temperature of the battery cell 12 is less than the first threshold temperature, the control unit 30 prohibits the USB Type-C terminal 142 or the metal terminal 141 from charging the battery cell 12. When the cell temperature is greater than or equal to the first threshold temperature and less than the second threshold temperature, the control unit 30 allows the USB Type-C terminal 142 or the metal terminal 141 to charge the battery cell 12 with a small current. When the cell temperature is greater than or equal to the second threshold temperature and less than the third threshold temperature, the control unit 30 allows the USB Type-C terminal 142 or the metal terminal 141 to charge the battery cell 12 with a large current. When the cell temperature is greater than or equal to the third threshold temperature, the control unit 30 prohibits the USB Type-C terminal 142 or the metal terminal 141 from charging the battery cell 12. Typically the first, second and third threshold temperatures are related such that the first threshold temperature is less than the second threshold temperature and less than the third threshold temperature.

In one embodiment, the control unit 30 may collect voltages of all single cells 12 and determine whether to change an operating state or an operating mode of the currently operating electrical terminal 14 according to a difference value or a mean value of all the cell voltages, where the operating state may include charging/discharging or stopping charging/discharging, and the operating mode may include a charging mode or a discharging mode, etc. In one embodiment, the control unit 30 may also control the charge/discharge rate of the respective electrical terminals 14 according to the voltage of the single-cell 12.

In this embodiment, the control unit 30 may be connected to a Type-C control element 32. In one embodiment, the Type-C control element 32 may be a power switch having a plurality of switch states, with different switch states corresponding to the states in which the USB Type-C terminal 142 transfers power. For example, when the Type-C control element 32 is turned on, the USB Type-C terminal 142 can input or output electric energy; when the Type-C control element 32 is disconnected, the USB Type-C terminal 142 cannot transmit power. That is, the control unit 30 may control the USB Type-C terminal 142 to be charged and discharged or not to be operated by controlling the on-state of the Type-C control element 32.

In this embodiment, a Type-C protocol handshake unit may be further integrated in the control unit 30, and may perform protocol matching with an external power device accessed by the USB Type-C terminal 142, so as to determine whether the external power device and the USB Type-C terminal can perform power transmission. In this embodiment, the Type-C protocol handshake unit may control the on state of the Type-C control element 32, so as to control the charging and discharging or non-operation of the USB Type-C terminal 142.

In this embodiment, the Type-C protocol handshaking unit may further determine whether to turn on the Type-C control element 32 by combining the protocol handshaking result and the control instruction of the control unit 30. That is, even if the Type-C protocol of the external consumer can adapt to the protocol of the USB Type-C terminal 142 in this application, the USB Type-C terminal 142 cannot necessarily transmit electric power.

In one embodiment, during the discharging process of the USB Type-C terminal 142, the control unit 30 may monitor the power information of the battery pack 10, and when the power of the battery pack 10 is less than or equal to the power threshold, control the Type-C protocol handshaking unit to change the operating mode of the USB Type-C terminal 142 to the charging mode, so as to prevent the USB Type-C terminal 142 from continuously outputting the electric power to cause the over-discharging of the battery pack 100.

In one embodiment, a voltage conversion module 34 may also be provided between the Type-C control element 32 and the control unit 30. Voltage conversion module 34 can step up or step down the electric energy of inputing to USBType-C terminal 142, perhaps carries out step down or step up the electric energy and transmit to USBType-C terminal 142 after handling and export. In other words, the voltage output by the USB Type-C terminal 142 is variable, and can be adaptively adapted to different nominal voltages of the electric devices. For example, the USB Type-C terminal 142 may supply power to a mobile phone with a nominal voltage of 3.6V or 3.7V, or may supply power to a notebook computer with a nominal voltage of about 14V.

In one embodiment, a cable identification unit 35 may be further provided on the circuit board 13, and may be disposed between the USB Type-C terminal 142 and the control unit 30, and may be capable of identifying the Type of power line connected to the USB Type-C terminal 142. So that the control unit 30 can control whether the USB Type-C terminal 142 transmits power according to the Type of the power line recognized by the cable recognition unit 35.

In the present embodiment, the charge and discharge management system further includes a communication module 36 capable of being connected to the communication connection pad of the metal terminal 141 to transmit communication data of the battery pack 100 or the external electric device to the control unit 30, for example, capable of transmitting parameters such as temperature or properties of the battery pack 100 or transmitting functional characteristic parameters of the external electric device. The temperature detection unit 37 is capable of detecting the temperature of the circuit board 13, the temperature of the battery cell 12, the temperature of other components, the ambient temperature inside the battery pack 10, and the like. The reference parameter setting unit 38 may set some reference voltage, current, temperature, etc. so that the control unit 30 avoids the battery pack 100 itself or an external power device from being overheated, overdischarged, overcharged, etc. when performing charge/discharge control. In one embodiment, a control switch may be included to control the power on of the control unit 30, which may be triggered by a user to power up or power down the control unit 30, thereby enabling the battery pack 10 to function properly or not.

In this embodiment, the charging and discharging management system may further include a power module 39, which can convert the electric energy of the electric core set into low-voltage electric energy to supply power to each component on the circuit board 13. It should be noted that, in fig. 11, all components that need to be supplied with power by the power module 39 are not wired without affecting the understanding of the charging and discharging management system of the battery pack 10.

In an embodiment, the charging and discharging management system inside the battery pack 100 is shown in fig. 12, and some functional modules are the same as those in the previous embodiment, which is not described herein again. In the present embodiment, the charge and discharge management system may include a first control unit 312 capable of controlling charge and discharge of the metal terminal 141; the second control unit 311 can control charging and discharging of the USB Type-C terminal 142. That is, the battery pack management system controls charging and discharging of each of the two electric terminals 14. In this embodiment, the voltage sampling unit 31 may be integrated in the first control unit 311, may also be integrated in the second control unit 311, or both the two control units are provided with the voltage sampling unit 31, and may collect the voltage of a single electric core 12.

In the present embodiment, the second control unit 311 may include a Type-C protocol handshake unit 33 and a control module 313. Wherein, type-C agreement unit 33 of shaking hands, can carry out the agreement with the external power consumption device that USB Type-C terminal 142 inserts and match to confirm whether the two can carry out power transmission. In this embodiment, the Type-C protocol handshaking unit 33 may control the conduction state of the Type-C control element 32, thereby controlling the USB Type-C terminal 142 to charge and discharge or not to operate. The control module 313 can control the voltage conversion module 34 to boost or buck the electric energy input or output to or from the battery pack 100.

In the present embodiment, the first control unit 311 can output control information to the Type-C protocol handshake unit 33 to cause the Type-C protocol handshake unit 33 to operate normally or stop operating. If the Type-C protocol handshaking unit 33 stops working, the USB Type-C terminal 142 will also stop transmitting power. That is, the first control unit 311 can also control the charging and discharging of the USB Type-C terminal 142.

In the present embodiment, the USB Type-C terminal 142 and the metal terminal 141 have different discharge cutoff voltages. Generally, the discharge cutoff voltage of the USB Type-C terminal 142 is greater than the discharge cutoff voltage of the metal terminal 141, so that the temperature rise of the USB Type-C terminal 142 during discharging can be reduced, and the battery pack 100 can be prevented from being deeply placed. In one embodiment, the ratio of the discharge cutoff voltage of the USB Type-C terminal 142 to the discharge cutoff voltage of the metal terminal 141 is greater than 1.1, and may be, for example, 1.2 or 1.3, etc.

In the present embodiment, the two control units may control the charging and discharging sequence of the USB Type-C terminal 142 and the metal terminal 141. In one embodiment, the USB Type-C terminal 142 and the metal terminal 141 can discharge to different electric devices at the same time, for example, the battery pack 100 charges a mobile phone through the USB Type-C terminal 142, and the electric power tool can also obtain power from the battery pack 100 through the metal terminal 141.

In one embodiment, when the USB Type-C terminal 142 is connected to the electric device to supply power to the electric device, the metal terminal 141 can also be connected to a charger to be charged. In this embodiment, when the two terminals are respectively connected to the external device, the two terminals may alternately operate, for example, after the metal terminal 141 preferentially charges the battery pack 100 for a period of time, the USB Type-C terminal 142 discharges to the electric device, and the two terminals alternately operate in sequence until one terminal finishes discharging or charging. In this embodiment, even when the two terminals are respectively connected to the external device, the metal terminal 141 can be used to charge the battery pack 100, and the USB Type-C terminal 142 cannot output electric energy to supply power to the external device until the battery pack 100 is charged.

In one embodiment, when the USB Type-C terminal 142 is connected to a charger to charge the battery pack 100, the metal terminal 141 may also be connected to an electric device such as a power tool to supply power to the electric device. In this embodiment, when the two terminals are respectively connected to the external device, the two terminals may alternately operate, for example, after the metal terminal 141 preferentially discharges to the electric device for a period of time, the USB Type-C terminal 142 charges the battery pack 100, and the two terminals alternately operate in sequence until one terminal finishes discharging or charging. In this embodiment, even when the two terminals are respectively connected to the external device, the metal terminal 141 may be used for discharging, and the USB Type-C terminal 142 cannot input electric energy to charge the battery pack 100 until the metal terminal 141 is discharged.

In one embodiment, the USB Type-C terminal 142 and the metal terminal 141 can be simultaneously connected to different types of chargers to charge the battery pack 100. In this embodiment, when both terminals are connected to the charger, the metal terminal 141 charges the battery pack 100 preferentially, and if the metal terminal 141 can be charged until the battery pack 100 is fully charged, the USB Type-C terminal 142 does not charge the battery pack 100 any more; if the metal terminal 141 has a problem during the charging process, the USB Type-C terminal 142 is used to charge the battery pack 100.

That is, when both the USB Type-C terminal 142 and the metal terminal 141 are connected to the device, the metal terminal 141 operates preferentially regardless of whether both terminals perform the charging function or the discharging function.

In one embodiment, in the process of operating the USB Type-C terminal 142, if the metal terminal 141 is connected to the electric device or the charging device, the control unit may control the USB Type-C terminal 142 to stop operating, and simultaneously control the metal terminal 141 to start operating. For example, the first control unit 311 outputs control information to the Type-C protocol handshake unit 33, so that the Type-C protocol handshake unit 33 operates normally or stops operating, and the USB Type-C terminal 142 also stops transmitting power.

The foregoing shows and describes the basic principles, essential features and advantages of the application. It should be understood by those skilled in the art that the above-described embodiments are not intended to limit the present application in any way, and all technical solutions obtained by means of equivalents or equivalent changes fall within the protection scope of the present application.

Claims

1. A battery pack, comprising:

a battery pack body comprising:

a housing assembly;

a plurality of cells disposed within the housing assembly;

a circuit board positioned within the housing assembly and connected to the cell;

an electrical terminal connected to the circuit board, the electrical terminal configured to engage a device terminal on a respective device when the battery pack is connected to the respective device;

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

the electric terminals at least comprise a USB Type-C terminal and a metal terminal connected with the electric tool;

the battery pack further includes:

at least one functional accessory detachably connected to the USB Type-C terminal or the housing assembly.

2. The battery pack according to claim 1, wherein: the functional attachment is including supporting the setting through USB Type-C terminal transmission electric energy.

3. The battery pack according to claim 1, wherein: the functional accessory includes: with the physical connection portion of casing subassembly physical connection and/or with the power transmission portion that USB Type-C terminal is connected.

4. The battery pack according to claim 3, wherein: the physical connection comprises a snap-fit structure.

5. The battery pack according to claim 3, wherein: the functional accessory includes a lighting device.

6. The battery pack according to claim 5, wherein: the lighting device is formed with a mounting surface surrounding at least one surface of the battery pack body.

7. The battery pack according to claim 6, wherein: the inboard of installation face be equipped with USB Type-C terminal connection the electric energy transmission portion.

8. The battery pack according to claim 6, wherein: and a light-emitting component is arranged on the outer side of the mounting surface.

9. The battery pack according to claim 8, wherein: the light emitting assembly includes an LED lamp.

10. The battery pack according to claim 1, wherein: the output power of the USB Type-C terminal is larger than 65W.