CN221282872U - Lithium ion battery pack - Google Patents

Abstract

The utility model relates to the field of lithium ion batteries, and discloses a lithium ion battery pack, which comprises: the lithium ion battery pack comprises at least one lithium ion battery pack body, wherein the tail end of a discharge wire of each lithium ion battery pack body is provided with a power plug matched with a discharge input interface of the protection device, and the tail end of a charging wire set of each lithium ion battery pack body is provided with a charging plug matched with a charging output interface of the protection device; the wireless connection circuit in the box body of the protection device is electrically connected with the control circuit of the charge-discharge protection circuit, a discharge input interface, a charge input interface, a discharge output interface and a charge output interface are arranged on the box body, the driving circuit is electrically connected with the discharge input interface and the control circuit and used for providing working current for the charge-discharge protection circuit, the control circuit is used for controlling the charge-discharge protection circuit, and the discharge input interface and the charge input interface are respectively electrically connected with the discharge output interface and the charge output interface through the charge-discharge protection circuit.

Description

Lithium ion battery pack

Technical Field

The utility model relates to the field of lithium ion batteries, in particular to a lithium ion battery pack.

Background

As the application of batteries, particularly lithium ion batteries, is becoming more and more widespread, the devices that use lithium ion batteries are also becoming more and more popular, and the requirements on the safety, convenience and flexibility of use of lithium ion batteries are also becoming more and more demanding.

The inventor finds that a plurality of battery packs are not provided with protection boards in the current market in the research process of the utility model, and potential safety hazards exist when the battery level cannot be subjected to charge and discharge protection in the use process.

Disclosure of Invention

One of the purposes of the embodiments of the present utility model is to provide a protection device suitable for lithium ion charging and discharging, which provides protection for charging and discharging of lithium ion batteries and improves the application safety of battery packs.

In a first aspect, an embodiment of the present utility model provides a lithium ion battery pack, which is characterized by comprising:

The lithium ion battery pack comprises at least one lithium ion battery pack body, wherein each lithium ion battery pack body comprises a plurality of battery cells, a discharge wire is respectively led out or connected with the lithium ion battery pack body through a socket, a power plug matched with a discharge input interface of the protection device is arranged at the tail end of the discharge wire, a charging wire group is respectively led out or connected with the lithium ion battery pack body through the socket, each charging wire is respectively and electrically connected with each battery cell, and a charging plug matched with a charging output interface of the protection device is arranged at the tail end of the charging wire group;

A protective device, comprising:

The box body is internally provided with a charge and discharge protection circuit, a driving circuit and a wireless connection circuit, the wireless connection circuit is electrically connected with a control circuit of the charge and discharge protection circuit,

A discharging input interface, a charging input interface, a discharging output interface and a charging output interface are arranged on the box body,

The driving circuit is electrically connected with the discharge input interface and the control circuit and is used for providing working current for the charge-discharge protection circuit, the control circuit is used for controlling the charge-discharge protection circuit,

The discharging input interface and the charging input interface are respectively and electrically connected with the discharging output interface and the charging output interface through the charging and discharging protection circuit.

Optionally, the charge-discharge protection circuit further includes:

The current detection circuit is electrically connected with the control circuit and is used for detecting the current discharging current and charging current and inputting a detection result to the control circuit;

The voltage detection circuit is electrically connected with the control circuit and is used for detecting the current charging voltage and the output voltage of the battery pack and inputting a detection result into the control circuit;

And the control circuit is used for controlling the switching circuit connected between the discharging input interface and the discharging output interface and the switching circuit connected between the charging input interface and the charging output interface to be turned off when any one of the current and the voltage exceeds a preset range.

And the control end of each switching circuit is electrically connected with the control circuit respectively, and is respectively connected in series between the discharge input interface and the discharge output interface and between the charge input interface and the charge output interface.

Optionally, the wireless connection circuit includes:

And the Bluetooth receiving circuit is electrically connected with the driving circuit and the control circuit and is used for being connected with external equipment Bluetooth.

Optionally, the wireless connection circuit includes:

and the WiFI connection circuit is electrically connected with the driving circuit and the control circuit and is used for connecting WIFI and connecting external equipment through the WIFI.

Optionally, a plurality of adjustment keys are further disposed on the top surface of the box body, and each adjustment key is electrically connected with the driving circuit and the control circuit and is used for inputting parameter adjustment instructions of a user.

Optionally, a display screen is further arranged on the top surface of the box body and is electrically connected with the driving circuit and the control circuit.

Optionally, the device further comprises a buzzer, the buzzer is electrically connected with the driving circuit through a switch circuit, the control end of the switch circuit is electrically connected with the control circuit, when any one of the current and the voltage exceeds a preset range, the switch circuit is conducted, the buzzer is connected with the driving circuit, and the buzzer is in a working state.

Optionally, the discharge input interface and the discharge output interface are respectively positioned on two opposite side surfaces of the box body;

the charging input interface and the charging output interface are respectively positioned on the other two opposite side surfaces of the box body.

Optionally, the box body is a rubber shell

From the above, when the lithium ion battery pack is used for providing power for external discharge, the protection box is connected, and when the lithium ion battery pack is required to be charged by adopting an external power supply, the protection box is connected, so that even if a charge and discharge protection circuit is not arranged in the lithium ion battery pack, the protection box can be used for realizing charge and discharge protection of the lithium ion battery pack, avoiding overcharge and overdischarge, providing discharge heavy current protection, short circuit protection and the like. The protection box of the embodiment is also suitable for a lithium ion battery pack with a charge and discharge protection circuit inside, and further protection is provided for charge and discharge.

Moreover, the protection box of this embodiment is small, compact structure, convenient to carry to, can use this box that charges repeatedly, for example, after first group battery is fully charged, charge the box with being applied to the charging of other lithium ion battery group, reach a multi-purpose, and then reduce cost.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this specification.

Fig. 1 is a schematic perspective view of a protection device for charging and discharging a lithium ion battery according to embodiment 1 of the present utility model;

FIG. 2 is a schematic diagram of a front view of the protection device shown in FIG. 1;

FIG. 3 is a schematic rear view of the protective device of FIG. 1;

FIG. 4 is a schematic left-hand view of the protective device of FIG. 1;

FIG. 5 is a right-side view of the protective device shown in FIG. 1;

FIG. 6 is a schematic top view of the protection device shown in FIG. 1;

FIG. 7 is a schematic bottom view of the protective device of FIG. 1;

Fig. 8 is a schematic diagram of a connection structure between a lithium ion battery pack body and a protection device according to embodiment 1 of the present utility model;

Fig. 9 is a schematic perspective view of a lithium ion battery pack body according to embodiment 1 of the present utility model;

Fig. 10 is a schematic diagram of the circuit operation principle of the protection device provided in embodiment 1 of the present utility model.

Reference numerals:

1: a case body;

2: a charge-discharge protection circuit; 21: a control circuit; 22: a current detection circuit;

23: a voltage detection circuit; 24: a switching circuit;

3: a driving circuit;

4: a wireless connection circuit; 41: a Bluetooth receiving circuit; 42: wiFI (wireless fidelity) connection circuit

51: A discharge input interface; 52: a discharge output interface;

61: a charging output interface; 62: a charging input interface;

7: adjusting the keys; 8: a display screen;

9: a lithium ion battery pack body;

91: discharging wire; 911: a power plug; 92: a charging wire group; 921: and a charging plug.

Description of the embodiments

The present utility model will now be described in detail with reference to the drawings and the specific embodiments thereof, wherein the exemplary embodiments and descriptions of the present utility model are provided for illustration of the utility model and are not intended to be limiting.

Examples of embodiments of the invention are illustrated in the accompanying drawings, in which like or similar reference numerals refer to like or similar elements or elements having like or similar functionality throughout.

The embodiments described below by referring to the drawings in the present specification are illustrative for the purpose of explaining the present invention and are not to be construed as limiting the invention. In the description of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Examples

See fig. 1-10.

The embodiment provides a protection device suitable for charging and discharging of a lithium ion battery pack, the protection device is a box body 1 with a smaller volume, and a charging and discharging protection circuit 2, a driving circuit 3 and a wireless connection circuit 4 are arranged in the box body 1.

The case 1 is provided with a discharge input interface 51, a charge input interface 62, a discharge output interface 52, and a charge output interface 61 for external connection.

The discharging input interface 51 is used for connecting a discharging wiring of the lithium ion battery pack serving as a power supply, and the discharging output interface 52 is used for plugging a power line of external electric equipment, namely the lithium ion battery pack discharges outwards through the protection box to provide a power supply. The charging input interface 62 is used for being connected with an external charging power supply, the charging output interface 61 is used for being electrically connected with a charging wire of the lithium ion battery pack, and the lithium ion battery pack is charged by the external power supply through the protection box.

The driving circuit 3 is electrically connected to the discharging input interface 51, so that when the lithium ion battery pack is applied, the voltage of the lithium ion battery pack connected to the discharging input interface 51 passes through the driving circuit 3 to be used as a power supply voltage VCC of an electronic circuit (including the charging and discharging protection circuit 2, the wireless connection circuit 4 and the like) in the protection device.

The discharging input interface 51 is electrically connected with the discharging output interface 52 through the charging and discharging protection circuit 2, the charging input interface 62 is electrically connected with the charging output interface 61 through the charging and discharging protection circuit 2 respectively, the control circuit 21 in the charging and discharging protection circuit 2 is used for controlling the on or off of a circuit between the discharging input interface 51 and the discharging output interface 52 according to any one or part of discharging voltage, discharging current, charging voltage and charging current, and controlling the on or off of a circuit between the charging input interface 62 and the charging output interface 61, so as to provide protection for charging and discharging of the lithium ion battery pack, and the safety performance of the product in the use process is improved. When any one or part of the discharge voltage, the discharge current, the charge voltage and the charge current exceeds the corresponding preset safety parameters, the control circuit 21 cuts off the connection between the discharge input interface 51 and the discharge output interface 52, cuts off the connection between the charge input interface 62 and the charge output interface 61, and realizes active circuit cutting off under abnormal conditions.

As an illustration of the present embodiment, the discharging input interface 51, the charging input interface 62, the discharging output interface 52, and the charging output interface 61 provided on the case 1 may be, respectively, prior art interfaces, such as but not limited to, sockets corresponding to plugs such as XT60, XT90, EC3, T-plug, small palace, XHR, EH, PH, and the like.

The inside of the box body 1 is also provided with a wireless connection circuit 4, and the wireless connection circuit 4 is electrically connected with the control circuit 21, so that a user can realize wireless connection between the control circuit 21 and an external terminal through a mobile phone or other terminals and the control circuit 21 of the protection box. So that the user can check the parameters of the charge and discharge protection circuit 2 of the protection box (such as, but not limited to, allowable charge current range, charge voltage range, discharge current range, discharge voltage range, etc.) on the application program (commonly called App) of the external terminal; the user can also set the parameters of the charge and discharge protection circuit 2 on the App of the terminal according to the current serial-parallel parameters of the lithium ion battery pack, and the parameters are wirelessly transmitted to the control circuit 21, and the control circuit 21 controls the charge and discharge protection circuit 2 according to the parameters set by the user. Thus, the protection box of the embodiment can be flexibly applied to different lithium ion battery packs.

From the above, when the lithium ion battery pack is used for providing power for external discharge, the protection box is connected, and when the lithium ion battery pack is required to be charged by adopting an external power supply, the protection box is connected, so that even if the charge and discharge protection circuit 2 is not arranged in the lithium ion battery pack, the protection box can be used for realizing charge and discharge protection of the lithium ion battery pack, avoiding overcharge and overdischarge, providing discharge heavy current protection, short circuit protection and the like. The protection box of the embodiment is also suitable for a lithium ion battery pack with a charge and discharge protection circuit 2 arranged inside, and further protection is provided for charge and discharge.

In addition, the protection box body 1 of this embodiment is small, compact structure, convenient to carry to, can use this box that charges repeatedly, for example, after first group battery is fully charged, charge the box with being applied to the charging of other lithium ion battery group, reach the purpose of a tractor serves several purposes, and then reduce cost.

The protection box matched with the embodiment in the lithium ion battery pack is used as an application accessory, so that the use of a user can be further facilitated, the safety performance of the product in the use process is improved, and the market competitiveness of the product is enhanced.

As an illustration of this embodiment, this embodiment also provides an implementation of the charge-discharge protection circuit 2.

The charge/discharge protection circuit 2 includes a current detection circuit 22, a voltage detection circuit 23, and a switching circuit 24. Wherein the switching circuit 24 may be implemented as a transistor, or a switching tube.

The current detection circuit 22 is electrically connected to the charge input interface 62 and the discharge input interface 51, and is used for detecting the present discharge current, the current detection circuit 22 is also electrically connected to the control circuit 21, and the present detection result is input to the control circuit 21. Similarly, the voltage detection circuit 23 is electrically connected to the charge input interface 62 and the discharge input interface 51, respectively, and detects the current voltage of the battery pack and the charging voltage of the charging power supply, and the voltage detection circuit 23 is also electrically connected to the control circuit 21, and inputs the current detection result to the control circuit 21. The control circuit 21 controls the switching circuit 24 connected in series between the discharge input interface 51 and the discharge output interface 52 and/or the switching circuit 24 connected in series between the charge input interface 62 and the charge output interface 61 according to the detection results of the current detection circuit 22, the voltage detection circuit 23 and the current preset control parameters, and cuts off the switching circuit 24 in the current abnormal circuit to cut off the discharge current (or the charge circuit) when either one of the current or the voltage exceeds the preset control parameter range.

As an illustration of the present embodiment, the wireless connection circuit 4 of the present embodiment includes: the Bluetooth receiving circuit 41, the Bluetooth receiving circuit 41 and the driving circuit 3, wherein the driving circuit 3 provides the working voltage VCC for the Bluetooth receiving circuit, the Bluetooth receiving circuit is further electrically connected with the control circuit 21, and the control circuit 21 is connected with an external terminal through Bluetooth, so that the external terminal sets the charge and discharge control parameters of the control circuit 21 through Bluetooth.

As an illustration of the present embodiment, the wireless connection circuit 4 of the present embodiment further includes: the WiFI connection circuit 42, the WiFI connection circuit 42 is electrically connected with the driving circuit 3, the driving circuit 3 provides the operating voltage VCC for the WiFI connection circuit 42, and the WiFI connection circuit 42 is further electrically connected with the control circuit 21 for connecting WiFI and connecting with an external terminal through WiFI.

As an illustration of the present embodiment, the case 1 of the present embodiment may be, but not limited to, a case 1 having a bottom in a cube or rectangle, which may be, but not limited to, a glue case.

As an illustration of the present embodiment, the discharge input interface 51 and the discharge output interface 52 are provided on opposite side surfaces of the case 1, and the charge input interface 62 and the charge output interface 61 are provided on opposite other side surfaces of the case 1. The interface setting structure is beneficial to the convenience of the interface connection and insertion when a user uses the interface.

As an illustration of the present embodiment, a plurality of adjustment keys 7 are further disposed on the top surface of the case 1 in the present embodiment, and each adjustment key 7 is electrically connected to the driving circuit 3 and the control circuit 21, and is used for inputting a parameter adjustment instruction of a user, and inputting the parameter adjustment instruction to the control circuit 21, so that the user can set charge and discharge control parameters through the adjustment keys 7.

As an illustration of this embodiment, the top surface of the box body 1 in this embodiment is further provided with a display screen 8, where the display screen 8 is electrically connected with the driving circuit 3 and the control circuit 21, respectively, and works under the control of the control circuit 21, for example, when the user sets or adjusts parameters by adjusting the key 7, the current parameters are displayed on the display screen 8, so that the user can adjust the parameters conveniently. The display 8 may also be illuminated to alert the user to timely charging when the current lithium ion battery voltage is too low.

As an illustration of this embodiment, a buzzer may be further disposed in the case 1, where the buzzer is electrically connected to the driving circuit 3 and the control circuit 21, and when any one of the current and the voltage exceeds a preset range, the control circuit 21 controls the buzzer to emit an audible alarm, where the driving circuit 3 provides the working voltage Vcc for the buzzer.

The present embodiment provides a battery pack with a protection box of the present embodiment, including at least one lithium ion battery pack body 9 composed of a plurality of lithium ion battery cells, a discharge wire 91 is led out of the battery pack body 9 or is connected through a socket, a power plug 911 matched with the discharge input interface 51 of the protection box is provided at the end of the discharge wire 91, and the battery pack body 9 provides power to the outside through the discharge wire 91 and outputs current.

A charging cord set 92 is also led out of each battery pack body 9 or plugged in through a socket, and a charging plug 921 matched with the charging output interface 61 of the protection box is arranged at the tail end of the charging cord set 92 so as to charge each battery cell in the battery pack body 9.

By adopting the battery pack kit of the embodiment, the charge and discharge protection circuit 2 of the battery pack body 9 can be externally packaged in the protection box of the embodiment, so that the battery pack kit is convenient for users to apply wiring connection and is also convenient for users to flexibly adjust charge and discharge control parameters of the battery pack according to application needs. The protection box can be applied to one battery pack body 9 or a plurality of battery pack bodies 9, and battery pack charging and discharging are convenient for users to the greatest extent

The above-described embodiments do not limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the above embodiments should be included in the scope of the present invention.

Claims (9)

1. A lithium ion battery pack kit, comprising:

The lithium ion battery pack comprises at least one lithium ion battery pack body, wherein each lithium ion battery pack body comprises a plurality of battery cells, a discharge wire is respectively led out or connected with the lithium ion battery pack body through a socket, a power plug matched with a discharge input interface of the protection device is arranged at the tail end of the discharge wire, a charging wire group is respectively led out or connected with the lithium ion battery pack body through the socket, each charging wire is respectively and electrically connected with each battery cell, and a charging plug matched with a charging output interface of the protection device is arranged at the tail end of the charging wire group;

A protective device, comprising:

The box body is internally provided with a charge and discharge protection circuit, a driving circuit and a wireless connection circuit, the wireless connection circuit is electrically connected with a control circuit of the charge and discharge protection circuit,

A discharging input interface, a charging input interface, a discharging output interface and a charging output interface are arranged on the box body,

The driving circuit is electrically connected with the discharge input interface and the control circuit and is used for providing working current for the charge-discharge protection circuit, the control circuit is used for controlling the charge-discharge protection circuit,

The discharging input interface and the charging input interface are respectively and electrically connected with the discharging output interface and the charging output interface through the charging and discharging protection circuit.

2. The lithium ion battery pack of claim 1, wherein,

The charge-discharge protection circuit further includes:

The current detection circuit is electrically connected with the control circuit and is used for detecting the current discharging current and charging current and inputting a detection result to the control circuit;

The voltage detection circuit is electrically connected with the control circuit and is used for detecting the current charging voltage and the output voltage of the battery pack and inputting a detection result into the control circuit;

the control circuit is used for controlling the switching circuit connected between the discharging input interface and the discharging output interface and the switching circuit connected between the charging input interface and the charging output interface to be turned off when any one of the current and the voltage exceeds a preset range;

And the control end of each switching circuit is electrically connected with the control circuit respectively, and is respectively connected in series between the discharge input interface and the discharge output interface and between the charge input interface and the charge output interface.

3. The lithium ion battery pack of claim 2, wherein,

The wireless connection circuit includes:

And the Bluetooth receiving circuit is electrically connected with the driving circuit and the control circuit and is used for being connected with external equipment Bluetooth.

4. The lithium ion battery pack of claim 2, wherein,

The wireless connection circuit includes:

and the WiFI connection circuit is electrically connected with the driving circuit and the control circuit and is used for connecting WIFI and connecting external equipment through the WIFI.

5. The lithium ion battery pack of claim 2, wherein,

The top surface of the box body is also provided with a plurality of adjusting keys, and each adjusting key is electrically connected with the driving circuit and the control circuit and is used for inputting parameter adjusting instructions of a user.

6. The lithium ion battery pack of claim 1, wherein,

The top surface of the box body is also provided with a display screen which is electrically connected with the driving circuit and the control circuit.

7. The lithium ion battery pack of claim 2, wherein,

The automatic power supply device is characterized by further comprising a buzzer, wherein the buzzer is electrically connected with the driving circuit through a switch circuit, the control end of the switch circuit is electrically connected with the control circuit, when any one of current and voltage exceeds a preset range, the switch circuit is conducted, the buzzer is connected with the driving circuit and is in a working state.

8. The lithium ion battery pack of claim 1, wherein,

The discharging input interface and the discharging output interface are respectively positioned on two opposite side surfaces of the box body;

the charging input interface and the charging output interface are respectively positioned on the other two opposite side surfaces of the box body.

9. The lithium ion battery pack of claim 1, wherein,

The box body is a rubber shell.