CN115483508A

CN115483508A - Battery protection plate, battery pack, and electronic apparatus

Info

Publication number: CN115483508A
Application number: CN202110597328.6A
Authority: CN
Inventors: 莫家庆; 鄢邦松; 曾令辉; 何志成
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2022-12-16

Abstract

The application provides a battery protection shield, battery pack, electronic equipment. A plurality of circuits are arranged on the conductive layer of the battery protection board, and two adjacent circuits are arranged at intervals to form a circuit gap; the battery protection plate further comprises an insulation extension layer, and when the insulation extension layer is processed, the viscosity of the insulation extension layer is relatively low, so that the line gap is easily filled. In addition, the battery protection board can comprise more than 3 conducting layers, wherein one conducting layer is provided with a positive electrode circuit, the other conducting layer is provided with a negative electrode circuit, and one or more other conducting layers are provided with control circuits; the thickness of the conductive layer in which the control lines are provided is relatively small so that the line gaps are filled. Under the condition of the impedance that does not influence the battery protection shield basically, the scheme that provides at this application is favorable to reducing the required consumptive material of filling the circuit gap, reduces the thickness of battery protection shield, reduces the occupation space of battery protection shield, promotes the flexibility of battery protection shield.

Description

Battery protection plate, battery pack, and electronic apparatus

Technical Field

The present application relates to the field of batteries and electronic devices, and more particularly, to a battery protection plate, a battery pack, and an electronic device.

Background

The battery protection board can protect the charging and discharging of the battery core. The battery protection plate may be provided with a battery connector. The battery connector may be a flexible circuit board to flexibly achieve electrical connection between the cell and devices located around the cell. At present, the market has a trend of rapidly charging a large-capacity battery cell. To achieve fast charging, it is generally necessary to charge the cells with a relatively large current. Increasing the charging current may expose the battery to temperature rise problems. In order to reduce the impedance loss of the battery connector and avoid unnecessary temperature rise, the battery protection board can be provided with a relatively thick circuit. However, this may reduce the flexibility of the flexible circuit board, which is not favorable for flexibly achieving electrical connection between the battery cell and devices located around the battery cell.

Disclosure of Invention

The application provides a battery protection board, battery pack and electronic equipment, and the purpose is under the circumstances that does not basically influence the impedance of battery protection board, reduces the thickness of battery protection board to reduce the occupation space of battery protection board, promote the flexibility of battery protection board.

In a first aspect, a battery protection board is provided, where the battery protection board can be divided into a hard protection board and a flexible extension board, the battery protection board includes a first conductive layer, the first conductive layer is distributed on the hard protection board and the flexible extension board, the first conductive layer is provided with a plurality of lines, two adjacent lines are arranged at intervals to form a line gap, and the battery protection board further includes:

the first insulation extending layer covers one side of the first conducting layer and is filled in a line gap of the first conducting layer, and the first insulation extending layer is made of a first material;

a first flexible cover layer on a surface of the flexible extension sheet;

a first adhesive layer adhered between the first flexible cover layer and the first insulation extension layer, the first adhesive layer being made of a second material,

the viscosity of the first material is less than the viscosity of the second material when the first and second materials are heated.

The adhesive layer may have a viscosity greater than the viscosity of the insulating spreader layer during processing. The difficulty of filling the line gap by using the glue layer is relatively increased. In order to ensure that the glue layer can fill the line gap, a glue layer with a relatively large thickness is required. This results in a relatively large overall thickness of the flexible extension sheet. The difficulty of filling the line gap by adopting the insulating extension layer is relatively small. The total amount of insulating spreading layer required to fill the slot lines is relatively small. The thickness of the insulating spreader layer may be relatively small, which in turn may allow the overall thickness of the flexible extension sheet to be relatively small. This is advantageous for reducing the space occupied by the battery protection board in the electronic device, and further, can provide a space occupied by other devices, such as a battery. Increasing the footprint of the battery may be beneficial to increasing the capacity of the battery. In addition, the thickness of the battery protection plate is reduced, so that the flexibility of the battery protection plate is improved, and the flexibility, the bending fatigue life, the assembling flexibility and the like of the flexible extension plate are improved.

With reference to the first aspect, in certain implementations of the first aspect, the first material includes one or more of: polyimide PI and ink.

With reference to the first aspect, in certain implementations of the first aspect, the second material includes one or more of: thermosetting adhesive, photosensitive adhesive and epoxy resin.

With reference to the first aspect, in certain implementations of the first aspect, the first conductive layer includes a first positive electrode line, a first negative electrode line, and the battery protection board further includes:

the second conducting layer comprises a second positive electrode circuit and a second negative electrode circuit;

a first flexible insulating layer between the first conductive layer and the second conductive layer;

a first electrical connection via passing through the first flexible insulating layer for electrically connecting the first positive wiring with the second positive wiring;

a second electrical connection via passing through the first flexible insulating layer for electrically connecting the first negative electrode line and the second negative electrode line.

The first conductive layer and the second conductive layer can be respectively and electrically connected with the positive pole piece and the negative pole piece of the battery. The second conducting layer also adopts insulating extending material to fill the gap, is favorable to further reducing the thickness on insulating extending layer, promotes the flexibility of battery protection shield.

With reference to the first aspect, in certain implementations of the first aspect, a control pin is disposed on the first conductive layer, the second conductive layer further includes a control line, and the battery protection board further includes:

and the third electric connection path penetrates through the first flexible insulating layer and is used for electrically connecting the control circuit with the control pin.

The first conductive layer and the second conductive layer can be conducted through a through hole and the like.

In a second aspect, there is provided a battery protection plate which is dividable into a hard protection plate and a flexible extension plate, the battery protection plate comprising:

the flexible protection plate comprises a hard protection plate and a flexible extension plate, wherein the hard protection plate and the flexible extension plate are arranged in a stacked mode, the flexible extension plate is arranged on the hard protection plate, the flexible extension plate is arranged on the flexible extension plate, the first conductive layer is arranged between the first conductive layer and the second conductive layer, the flexible insulation layer is arranged between the first conductive layer and the second conductive layer, the second flexible insulation layer is arranged between the second conductive layer and the third conductive layer, a first circuit is arranged on the first conductive layer, a plurality of control circuits are arranged on the second conductive layer, a second circuit is arranged on the third conductive layer, one of the first circuit and the second circuit is an anode circuit, and the other is a cathode circuit.

The first conducting layer and the third conducting layer are respectively used for arranging a positive circuit and a negative circuit so as to be respectively conducted with a positive pole piece and a negative pole piece of the battery. The control wiring may be mainly disposed on the second conductive layer. Therefore, the value of the current that can be conducted to the first conductive layer and the third conductive layer can be relatively large. The charging performance of the battery is improved. In addition, the number of the line gaps on the first conducting layer and the third conducting layer is small, and the total amount of the insulating materials required by the first conducting layer and the third conducting layer is relatively small, so that the total thickness of the battery is favorably reduced.

The second conducting layer is arranged between the first conducting layer and the third conducting layer, and therefore the short-circuit gap between the first conducting layer and the third conducting layer is reduced.

With reference to the second aspect, in certain implementations of the second aspect, the thickness of the first conductive layer is greater than the thickness of the second conductive layer, and the thickness of the third conductive layer is greater than the thickness of the second conductive layer.

The current value of the second conductive layer may be relatively small, and thus the thickness of the second conductive layer itself may be reduced. The overall thickness of the battery is reduced, so that the occupied space of the battery protection board in the electronic equipment is reduced, and the occupied space of other devices such as the battery can be provided. Increasing the footprint of the battery may be beneficial to increasing the capacity of the battery. In addition, the thickness of the battery protection plate is reduced, so that the flexibility of the battery protection plate is improved, and the flexibility, the bending fatigue life, the assembling flexibility and the like of the flexible extension plate are improved.

With reference to the second aspect, in certain implementations of the second aspect, no positive line and no negative line are disposed on the second conductive layer.

The scene that the second conducting layer circulates large current can be relatively less, and the thickness of the second conducting layer can be further reduced. This is advantageous in reducing the overall thickness of the battery.

With reference to the second aspect, in certain implementations of the second aspect, no control line is disposed on the first conductive layer and the third conductive layer.

The line gaps existing on the first conductive layer and the third conductive layer can be as small as possible, and the total amount of insulating materials used for filling the gaps can be further reduced. This is advantageous in reducing the overall thickness of the battery.

With reference to the second aspect, in certain implementations of the second aspect, two adjacent control lines of the second conductive layer are spaced apart to form a line gap, and the battery protection board further includes:

and the third flexible insulating layer is filled in the line gap and is adhered between the second conductive layer and the first flexible insulating layer.

The third flexible insulating layer can not only enable adjacent lines on the second conducting layer to be mutually disconnected, but also enable the second conducting layer and the first flexible insulating layer to be mutually pasted, so that the mechanical stability of the battery protection plate, particularly the flexible extension plate, is improved.

With reference to the second aspect, in certain implementations of the second aspect, the third flexible insulating layer includes:

a first part filled in the line gap, the material of the first part being a first material;

a second portion adhered between the first portion and the first flexible insulating layer, the second portion being of a second material, wherein,

The third flexible insulating layer is divided into two parts, which can be used for different functions, respectively. The first portion may be used primarily for the insulating function. The second portion may be used primarily for the paste function. The viscosity of the glue material may be greater than the viscosity of the insulating spreader material during processing. The third flexible insulating layer is made of an insulating extension material, so that the thickness of the third flexible insulating layer is reduced, and the total thickness of the flexible extension plate can be relatively small.

With reference to the second aspect, in certain implementations of the second aspect, the first material includes one or more of: polyimide PI and ink.

With reference to the second aspect, in certain implementations of the second aspect, the second material includes one or more of: thermosetting adhesive, photosensitive adhesive and epoxy resin.

With reference to the second aspect, in certain implementations of the second aspect, a pin is disposed on the first conductive layer, and the battery protection board further includes:

a fourth electrical connection via passing through the first flexible insulating layer and the second flexible insulating layer for electrically connecting the pin with the second line;

a first insulating member disposed within the first conductive layer between the fourth electrical connection via and the first line for spacing the fourth electrical connection via from the first line.

The battery protection board can be electrically connected with other components through the positive electrode pin and the negative electrode pin on the first conductive layer. A direct short circuit between the positive pin and the negative pin is not possible. The insulating part is arranged around the pin, so that the first line and the second line can be prevented from being short-circuited.

In a third aspect, there is provided a battery protection plate dividable into a rigid protection plate and a flexible extension plate, the battery protection plate including:

the flexible protection plate comprises a hard protection plate and a flexible extension plate, wherein the hard protection plate and the flexible extension plate are arranged in a stacked mode, the first conducting layer, the second conducting layer, the third conducting layer, the first flexible insulation layer and the second flexible insulation layer are all distributed on the hard protection plate and the flexible extension plate, the first conducting layer is located between the second conducting layer and the third conducting layer, the first flexible insulation layer is located between the first conducting layer and the second conducting layer, the second flexible insulation layer is located between the first conducting layer and the third conducting layer, a first circuit is arranged on the first conducting layer, a plurality of control circuits are arranged on the second conducting layer, a second circuit is arranged on the third conducting layer, one of the first circuit and the second circuit is an anode circuit, and the other is a cathode circuit.

The first conducting layer and the third conducting layer are respectively used for arranging a positive electrode circuit and a negative electrode circuit so as to be respectively conducted with a positive electrode piece and a negative electrode piece of the battery. The control wiring may be mainly disposed on the second conductive layer. Therefore, the value of the current that can be conducted to the first conductive layer and the third conductive layer can be relatively large. The charging performance of the battery is improved. In addition, because the number of the line gaps on the first conducting layer and the third conducting layer is small, the total amount of the insulating materials required by the first conducting layer and the third conducting layer is relatively small, and the total thickness of the battery is favorably reduced.

With first conducting layer setting at second conducting layer, third conducting layer, be favorable to making control circuit be close to the outside relatively, and then be convenient for expose the control pin of battery protection shield, be even if be convenient for arrange the line. In addition, the resistances of the positive electrode circuit and the negative electrode circuit are close.

With reference to the third aspect, in certain implementations of the third aspect, a thickness of the first conductive layer is greater than a thickness of the second conductive layer, and a thickness of the third conductive layer is greater than a thickness of the second conductive layer.

The current value of the second conductive layer may be relatively small, and thus the thickness of the second conductive layer itself may be reduced. The overall thickness of the battery is reduced, the occupied space of the battery protection board in the electronic equipment is reduced, and the occupied space can be provided for other devices, such as the battery. Increasing the footprint of the battery may be beneficial to increasing the capacity of the battery. In addition, the thickness of the battery protection plate is reduced, so that the flexibility of the battery protection plate is improved, and the flexibility, the bending fatigue life, the assembling flexibility and the like of the flexible extension plate are improved.

With reference to the third aspect, in certain implementations of the third aspect, no positive electrode line and no negative electrode line are disposed on the second conductive layer.

With reference to the third aspect, in certain implementations of the third aspect, no control line is disposed on the first conductive layer and the third conductive layer.

The line gaps existing on the first conductive layer and the third conductive layer can be as few as possible, which is beneficial to further reducing the total amount of insulating materials used for filling the gaps. This is advantageous in reducing the overall thickness of the battery.

With reference to the third aspect, in certain implementations of the third aspect, two adjacent control lines of the second conductive layer are spaced apart to form a line gap, and the battery protection board further includes:

the first insulation extension layer is filled in the line gap, and the material of the first insulation extension layer is a first material;

a first flexible cover layer on a surface of the flexible extension sheet;

The adhesive layer may have a viscosity greater than the viscosity of the insulating extensible layer during processing. The difficulty of filling the line gap by using the glue layer is relatively increased. To ensure that the glue layer can fill the line gap, a relatively thick glue layer needs to be used. This results in a relatively large overall thickness of the flexible extension sheet. The difficulty of filling the line gap by adopting the insulating extension layer is relatively small. The total amount of insulating spreading layer required to fill the slot lines is relatively small. The thickness of the insulating spreader layer may be relatively small, which in turn may allow the overall thickness of the flexible extension sheet to be relatively small.

With reference to the third aspect, in certain implementations of the third aspect, the first material includes one or more of: polyimide PI and ink.

With reference to the third aspect, in certain implementations of the third aspect, the second material includes one or more of: thermosetting adhesive, photosensitive adhesive, and epoxy resin.

With reference to the third aspect, in certain implementations of the third aspect, a pin is disposed on the first conductive layer, and the battery protection board further includes:

a fifth electrical connection via passing through the first flexible insulating layer and the second flexible insulating layer for electrically connecting the pin and the second line;

a second insulating member disposed within the first conductive layer between the fifth electrical connection via and the first line for spacing the fourth electrical connection via from the first line.

The battery protection board can be electrically connected with other components through the positive electrode pin and the negative electrode pin on the second conductive layer. A direct short circuit between the positive pin and the negative pin is not possible. The insulating part is arranged in the area, corresponding to the pins, of the first conducting layer, so that short circuit between the first circuit and the second circuit can be avoided.

With reference to the third aspect, in certain implementations of the third aspect, the fifth electrical connection path includes:

an electrical connection region disposed on the first conductive layer and spaced apart from the first line, the second insulating member being located between the first line and the electrical connection region;

a first electrical connector passing through the first flexible insulating layer and electrically connected between the pin and the electrical connection region;

a second electrical connection passing through the second flexible insulating layer and electrically connected between the electrical connection region and the second line.

And the first flexible insulating layer and the second flexible insulating layer are respectively provided with an electric connector which can conduct the fifth electric connection path.

a third electrical connection passing through the first flexible insulating layer, the second flexible insulating layer, and electrically connected between the pin and the second line,

the second insulating member is positioned between the first and second flexible insulating layers and between the first and third electrical connections for spacing the third electrical connections from the first circuitry.

The fifth electrical connection path may include, for example, a cylindrical conductive member, which may directly penetrate the first and second flexible insulating layers.

a fifth electrical connection via passing through the first flexible insulating layer, the second flexible insulating layer, for electrically connecting the pin with the second line;

wherein the first or second flexible insulating layer is filled between the fifth electrical connection via and the first line for spacing the fifth electrical connection via from the first line.

The flexible insulating layer is directly adopted to avoid short circuit between the anode pin and the cathode pin, and the processing technology of the battery protection board can be simplified.

In a fourth aspect, a battery assembly is provided, comprising a battery and the battery protection plate as described in any one of the implementations of the first to third aspects above, the battery protection plate being electrically connected to a positive electrode and a negative electrode of the battery.

In a fifth aspect, an electronic device is provided, comprising a battery and the battery protection board as described in any one of the implementations of the first to third aspects above, the battery protection board being electrically connected to a positive electrode and a negative electrode of the battery.

A sixth aspect provides an electronic device comprising a battery pack as described in any one of the implementations of the fourth aspect.

Drawings

Fig. 1 is a schematic configuration diagram of an electronic apparatus.

Fig. 2 is a schematic structural view of a battery pack.

Fig. 3 is a schematic structural view of another battery module.

Fig. 4 is a schematic structural view of still another battery assembly.

Fig. 5 is a schematic structural diagram of a battery protection plate provided in an embodiment of the present application.

Fig. 6 is a schematic structural diagram of a circuit of a battery protection plate according to an embodiment of the present application.

Fig. 7 is a schematic structural view of a flexible extension board provided in an embodiment of the present application.

Fig. 8 is a schematic structural view of another battery protection plate provided in an embodiment of the present application.

Fig. 9 is a schematic structural diagram of a circuit of another battery protection board provided in an embodiment of the present application.

Fig. 10 is a schematic structural view of another flexible extension sheet provided in an embodiment of the present application.

Fig. 11 is a schematic structural view of another flexible extension sheet provided in an embodiment of the present application.

Fig. 12 is a schematic structural view of still another battery protection plate provided in an embodiment of the present application.

Fig. 13 is a schematic structural diagram of a circuit of still another battery protection plate provided in an embodiment of the present application.

Fig. 14 is a schematic structural view of still another flexible extension sheet provided in an embodiment of the present application.

Fig. 15 is a schematic structural view of another flexible extension sheet provided in an embodiment of the present application.

Fig. 16 is a schematic structural view of still another flexible extension sheet provided in an embodiment of the present application.

Fig. 17 is a schematic structural view of another flexible extension sheet provided in an embodiment of the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of an electronic device 100 provided in an embodiment of the present application. The electronic device 100 may be, for example, a terminal consumer product or a 3C electronic product (computer, communication, consumer), such as a mobile phone, a mobile power supply, a portable device, a tablet computer, an e-reader, a notebook computer, a digital camera, a wearable device, a vehicle-mounted terminal, an earphone, and so on. The electronic device 100 may, for example, be a mobile device. The moving device may be, for example, a vehicle, a motorized skateboard, a motorized bicycle, or the like. The embodiment shown in fig. 1 is described by taking the electronic device 100 as a mobile phone.

The electronic device 100 may include a housing 10, a display screen 20, and a battery assembly 30. Specifically, the housing 10 may include a bezel 12 and a rear cover 11. The bezel 12 may be located between the display screen 20 and the rear cover 11. The bezel 12 may surround the periphery of the display screen 20 and surround the periphery of the rear cover 11. The cavity formed between the display screen 20, the bezel 12, and the rear cover 11 may be used to house the battery assembly 30. The cavity of the electronic device 100 in which the battery assembly 30 is placed may be referred to as a battery compartment. The battery assembly 30 may be used to power electronics within the electronic device 100.

Fig. 2 to 4 are schematic structural views of various battery modules 30. These battery assemblies 30 may correspond to the battery assemblies 30 shown in fig. 1.

The battery assembly 30 may include a battery 310 and a battery protection plate 320. The battery 310 may be electrically connected with the battery protection plate 320.

The battery 310 may be a lithium ion secondary battery, a sodium ion secondary battery, a potassium ion secondary battery, a magnesium ion secondary battery, a zinc ion secondary battery, an aluminum ion secondary battery, or the like. The battery 310 may include a positive electrode material, a negative electrode material, an electrolyte, and a separator. The anode material and the cathode material can be used for extracting metal ions (such as lithium ions) to realize the storage and release of energy. The positive electrode material and the negative electrode material are main energy storage parts of the battery 310, and can embody the energy density, the cycle performance and the safety performance of the battery 310. The electrolyte can be a transmission carrier of metal ions between the anode material and the cathode material. The separator is permeable to metal ions, but is not conductive by itself, so that the separator can separate the positive electrode material and the negative electrode material to prevent short circuit between the positive electrode material and the negative electrode material.

The battery protection plate 320 may serve to protect the battery 310 so that the charged state or the discharged state of the battery 310 may be relatively normal. The battery protection plate 320 may perform overcharge protection, overdischarge protection, overcurrent protection, overheat protection, and the like for the battery 310, for example.

In one example, the state of charge of battery 310 may be different at different stages of charging. When the charge of the battery 310 is relatively low, the state of charge of the battery 310 may be approximated as a constant current charge. As the charge of the battery 310 gradually increases, the voltage of the battery 310 may gradually increase, and the current of the battery 310 may gradually decrease. The state of charge of the battery 310 may be shifted to approximately constant voltage charging when the charge of the battery 310 is nearly fully charged. If the battery 310 is in the constant current charging mode and the voltage of the battery 310 is too high or the battery 310 is in the constant voltage charging mode and the charging current of the battery 310 is too high during the charging process of the battery 310, the charging load of the battery 310 is large, and the battery 310 is easily damaged. When the charging current of the battery 310 is too large or the charging voltage of the battery 310 is too large, the protection switch on the battery protection board 320 may be turned off to start the overshoot protection function of the battery protection board 320, so as to protect the charging safety of the battery 310.

In another example, when the electronic device runs a process with high power consumption, the discharge current of the battery 310 may be relatively high, which may easily cause overheating of the battery 310 during discharging. When the discharge current of the battery 310 is too large or the battery 310 generates heat seriously, the protection switch on the battery protection board 320 can be switched off to start the over-discharge protection function of the battery protection board 320, so that the discharge safety of the battery 310 can be protected.

The battery protection plate 320 may include a hard protection plate 321 and a flexible extension plate.

The hard protective plate 321 may be electrically connected to the positive electrode material and the negative electrode material of the battery 310. For example, the hard protective plate 321 may be electrically connected to a positive electrode tab and a negative electrode tab of the battery 310.

The hard protective plate 321 may be used to carry electronics that may be used, for example, to implement charging and discharging protection of the battery 310. The electronic devices carried on the hard protection plate 321 may include, for example, metal oxide semiconductor field effect transistors (MOSFET (metal oxide semiconductor field effect transistor) tubes, MOS (metal oxide semiconductor) tubes for short, and Integrated Circuits (ICs) for charge and discharge protection. The MOS transistor may be the protection switch described above. The MOS tube can be connected in series in a charging loop or a discharging loop. The charge and discharge protection integrated circuit may include a comparator. The comparator may be used, for example, to monitor the voltage difference across the battery 310, etc. When the comparator detects an abnormal condition (e.g., the voltage difference between the two ends of the battery 310 is too high), the charging/discharging protection integrated circuit may cut off the MOS transistor to cut off the charging circuit or the discharging circuit, so as to perform charging protection or discharging protection on the battery 310.

Optionally, the electronic devices carried on the hard protection plate 321 may further include, for example, a resistor, a capacitor, an auxiliary current fuse (fuse), a Positive Temperature Coefficient (PTC) device (which may perform over-temperature protection or over-current protection), a memory, and the like.

The first end of the flexible extension plate may be connected to the hard protection plate 321 and electrically connected to the hard protection plate 321. The second end of the flexible extension board may be provided with a connector (e.g., a Board To Board (BTB) connector), for example. The flexible extension board may be electrically connected to other devices within the electronic device through the connector, such as a motherboard of the electronic device, so that the battery 310 may power the other circuit board components.

In the example shown in fig. 2, the battery protection plate 320 may include a hard protection plate 321, a first flexible extension plate 322. A hard protective plate 321 is located on a first side of the battery 310. The first end of the first flexible extension plate 322 may be connected to the first end of the hard protection plate 321, be turned over on the hard protection plate 321, and extend toward the first side of the battery 310. A first connector 331 may be provided on the second end of the first flexible extension plate 322. The battery protection plate 320 may be electrically connected with other devices within the electronic apparatus through the first connector 331.

Similar to the example shown in fig. 2, in the example shown in fig. 3, the battery protection plate 320 may include a hard protection plate 321, a first flexible extension plate 322. In the example shown in fig. 3, the battery protection plate 320 may further include a second flexible circuit board. The first end of the second flexible extension plate 323 may be connected to the second end of the hard protection plate 321, be turned over on the hard protection plate 321, and extend toward the first side of the battery 310. A second connector 332 may be provided on the second end of the first flexible extension sheet 322. The battery protection board 320 may be electrically connected to other devices in the electronic apparatus through the first connector 331 and the second connector 332. The device at the first end of the hard protection plate 321 may be electrically connected to the battery protection plate 320 through the first connector 331. The device at the second end of the hard protection plate 321 may be electrically connected to the battery protection plate 320 through the second connector 332.

Similar to the example shown in fig. 2, in the example shown in fig. 4, the battery protection plate 320 may include a hard protection plate 321, a first flexible extension plate 322. In the example shown in fig. 4, the battery protection plate 320 may further include a second flexible circuit board. The first end of the second flexible extension plate 323 may be connected to the second end of the hard protection plate 321, be turned over on the hard protection plate 321, and extend toward the second side of the battery 310. A second connector 332 may be provided on the second end of the first flexible extension sheet 322. The device located at the first side of the battery 310 may be electrically connected to the battery protection plate 320 through the first connector 331. The device located at the second side of the battery 310 may be electrically connected to the battery protection plate 320 through the second connector 332.

High-capacity batteries, quick battery charging and the like are gradually developing trends of batteries.

In order to increase the capacity of the battery in a limited space, one way to achieve this is to reduce the size of the conductive material in the battery protection plate to reduce the overall footprint of the battery protection plate. However, this may increase the impedance of the battery protection board. In the case where the charging current or the discharging current is relatively large, the battery protection plate may be overheated, and the like, and thus the charging speed of the battery may be limited.

In order to increase the charging speed of the battery in a limited space, one implementation is to increase the size of the conductive material in the battery protection plate to reduce the impedance of the battery protection plate. However, this may protect the overall footprint of the board and may reduce the capacity of the battery.

Fig. 5 to 7 illustrate a battery protection plate 320 provided in an embodiment of the present application. The battery protection plate 320 may be applied to any one of the battery modules 30 of fig. 2 to 4. The battery protection plate 320 may be divided into a hard protection plate 321 and a flexible extension plate 322.

The battery protection panel 320 may include a first conductive layer 410, a second conductive layer 420, and a first flexible insulating layer 430, which are stacked. A first flexible insulating layer 430 may be positioned between the first conductive layer 410 and the second conductive layer 420 to insulate the first conductive layer 410 from the second conductive layer 420. The conductive layer is made of a conductive material such as copper. The flexible insulating layer may have bendability. The flexible insulating layer may also be referred to as a flexible insulating material. The flexible insulating layer may be made of Polyimide (PI), polyethylene terephthalate (PET), or the like.

The first conductive layer 410, the second conductive layer 420, and the first flexible insulating layer 430 may be distributed on the hard protection plate 321 and the flexible extension plate 322. The conductive layer of the flexible extension plate 322 may be connected to the corresponding conductive layer of the hard protection plate 321. The conductive layer of the flexible extension plate 322 may be integrally molded with the corresponding conductive layer of the hard protection plate 321. The insulating layer of the flexible extension plate 322 may be connected to the corresponding insulating layer of the hard protection plate 321. The insulating layer of the flexible extension plate 322 may be integrally formed with the corresponding insulating layer of the hard protection plate 321.

As shown in fig. 6, the first conductive layer 410 and the second conductive layer 420 may have wires arranged thereon.

The first conductive layer 410 may include a first positive electrode wiring 411, a first negative electrode wiring 412, at least one first control wiring 413; the second conductive layer 420 may include a second positive line 421, a second negative line 422, and at least one second control line 423.

The positive electrode line may be used to output an electric signal from the positive electrode of the battery or to input an electric signal to the positive electrode of the battery. The negative electrode line may be used to output an electrical signal from the negative electrode of the battery or to input an electrical signal to the negative electrode of the battery. The control lines may be used to transmit control signals. The control signal may include, for example, a signal to adjust a battery charge-discharge mode. In order to reduce the impedance of the battery pack, the thickness, the transverse dimension, and the like of the positive electrode line and the negative electrode line may be relatively large. That is, the positive electrode line and the negative electrode line can be relatively thick and relatively wide.

The first and second

positive electrode lines

411 and 421 may be positioned at a first side of the battery protection plate 320. The first positive electrode wiring 411 and the second positive electrode wiring 421 may be electrically connected through a first electrical connection via 431 passing through the first flexible insulating layer 430.

The first negative electrode wire 412 and the second negative electrode wire 422 may be positioned at a second side of the battery protection plate 320. The first negative electrode wiring 412 and the second negative electrode wiring 422 may be electrically connected through a second electrical connection path 432 passing through the first flexible insulating layer 430.

The first control line 413 may be located between the first positive electrode line 411 and the first negative electrode line 412. The second control line 423 may be located between the second positive line 421 and the second negative line 422.

The battery protection plate 320 may further include a plurality of pins. The leads may be, for example, conductive members such as pads. A plurality of pins may be disposed on the first conductive layer 410, for example. The plurality of pins may include, for example, a positive pin 441, a negative pin 442, and a plurality of control pins. The positive electrode pin 441 may be electrically connected to a positive electrode line. The negative pin 442 may be electrically connected to a negative trace. The control pin may be electrically connected to the control line.

For example, the positive electrode pin 441 may be disposed on the first positive electrode line 411. The positive electrode pin 441 may be electrically connected to the first positive electrode wire 411, and the positive electrode pin 441 may be electrically connected to the second positive electrode wire 421 through the first electrical connection path 431. The negative pin 442 may be disposed on the first negative line 412. The negative pin 442 may be electrically connected to the first negative wiring 412, and the negative pin 442 may be electrically connected to the second negative wiring 422 through the second electrical connection path 432. The plurality of control pins may include a first control pin 443. The first control pin 443 may be electrically connected with the first control wiring 413 of the first conductive layer 410. The plurality of control pins may also include a second control pin 444. The second control pin 444 may be electrically connected with the second control line 423 through a third electrical connection path 433 passing through the first flexible insulating layer 430.

The battery protection plate 320 may further include a first insulation extension layer 611, a second insulation extension layer 612. The first insulating extension layer 611 may be located on a side of the first flexible insulating layer 430 away from the second conductive layer 420. A second insulating extension layer 612 may be located on a side of the first flexible insulating layer 430 remote from the first conductive layer 410. The material of the insulating extensible layer may be an insulating material having high extensibility at high temperature, such as ink having high extensibility at high temperature, liquid PI, or the like. The insulating spreading layer can be applied to the conductive layer, for example, by screen printing, dispensing, spraying, or the like. The material of the insulating spreader layer may be a first material, which in a heated (or processed) state may be relatively less viscous.

Fig. 7 isbase:Sub>A sectional viewbase:Sub>A-base:Sub>A shown in fig. 5.

Since a plurality of lines (such as the first positive line 411, the first negative line 412, and the first control line 413) may be arranged on the first conductive layer 410, and a line gap may exist between two adjacent lines, a plurality of first line gaps 414 may be formed in the first conductive layer 410. The first insulation extension layer 611 may cover a side of the first conductive layer 410 away from the first flexible insulation layer 430 and may fill in the first line slit 414 of the first conductive layer 410. The first insulating extension layer 611 may be in contact with the first flexible insulating layer 430.

Since a plurality of lines (such as the second positive line 421, the second negative line 422, and the second control line 423) may be arranged on the second conductive layer 420, and a line gap may exist between two adjacent lines, a plurality of second line gaps 424 may be formed in the second conductive layer 420. A second insulation extension layer 612 may cover a side of the second conductive layer 420 remote from the first flexible insulation layer 430 and may fill in the second line gaps 424 of the second conductive layer 420. The second insulation extension layer 612 may be in contact with the first flexible insulation layer 430.

The flexible extension board 322 may further include a first flexible cover layer 631, a second flexible cover layer 632, a first adhesive layer 621, and a second adhesive layer 622. The first flexible cover layer 631 may be adhered to the first insulating extension layer 611 by the first adhesive layer 621. The second flexible cover layer 632 may be attached to the second insulating extension layer 612 by a second adhesive layer 622. The flexible cover layer may be a material having bendability, such as PI. The material of the flexible cover layer may facilitate the bendability of the flexible extension sheet 322. A flexible cover layer may be used to cover the topmost conductive layer. The flexible cover layer can be beneficial to avoiding the outermost conductive layer from being exposed, and further reducing the possibility of pollution of the conductive layer. The flexible cover layer may be advantageous to avoid scratching the surface of the flexible extension sheet 322.

The glue layer may have an adhesive property. The material of the glue layer may be the second material. The viscosity of the second material may be relatively high in the heated (or processed) state. For example, when the first material (i.e., the insulating spreader layer) and the second material (i.e., the glue layer) are heated (or processed), the viscosity of the first material is less than the viscosity of the second material.

A first hard insulating layer 531 and a second hard insulating layer 532 may be provided over the hard protective plate 321. A first hard insulating layer 531 may be disposed on a side of the first conductive layer 410 away from the first flexible insulating layer 430. A second hard insulating layer 532 may be disposed on a side of the second conductive layer 420 remote from the first flexible insulating layer 430. The hard insulating layer may be, for example, a prepreg. The hard insulating layer may be used to provide the hard circuit board with relatively large rigidity, so that the hard protection plate 321 may not be easily bent and deformed.

In addition to the first conductive layer 410, the second conductive layer 420, and the first flexible insulating layer 430, a plurality of other conductive layers and a plurality of insulating layers may be provided over the hard protective plate 321. In the example shown in fig. 5, a conductive layer 5101, an insulating layer 5201, and a conductive layer 5102 which are stacked in this order, and a conductive layer 5103, an insulating layer 5202, and a conductive layer 5104 which are stacked in this order may be provided over the hard protection plate 321. In addition to the first conductive layer 410 and the second conductive layer 420, the lines on the plurality of conductive layers 510 of the hard protection plate 321 may be used to electrically connect to devices carried by the hard protection plate 321.

The hard protective plate 321 may further have a first hard cover layer 541 and a second hard cover layer 542. The hard coating may be, for example, a hard ink. A hard cover layer may be used to cover the top conductive layer in order to prevent the top conductive layer from being exposed, thereby reducing the likelihood of contamination of the conductive layer.

In one example, the thickness of the first flexible overlay 631 may be about 12.5 μm. The thickness of the second flexible cover layer 632 may be about 12.5 μm. The thickness of the first glue layer 621 may be about 12.5 μm. The thickness of the second glue layer 622 may be about 12.5 μm. The thickness of the first insulation extension layer 611 may be about 30 μm. The thickness of the second insulating extension layer 612 may be about 30 μm. The thickness of the second glue layer 622 may be about 12.5 μm. The thickness of the first conductive layer 410 may be about 90 μm. The thickness of the second conductive layer 420 may be about 90 μm. The thickness of the first flexible insulating layer 430 may be about 25 μm. The thickness of the flexible extension plate 322 of the battery protection plate 320 may be about 315 μm.

In some scenarios, the insulating spreader layer may be replaced with a glue layer. The glue layer can be filled into the line gap by heating and pressurizing. In order to reduce the impedance of the battery assembly, the thickness of the conductive layer may be relatively thick, and thus the depth of the line gap formed by the conductive layer is relatively deep. The extensibility of the bondline is relatively poor, however. The difficulty of filling the line gap by using the glue layer is relatively increased. To ensure that the glue layer fills the line gap, a relatively large thickness of glue layer (e.g. the thickness of the glue layer may be about 70 μm) needs to be used. This allows the overall thickness of the flexible extension sheet 322 to be relatively large (e.g., the overall thickness may be up to 370 μm).

If the line gap is filled with the insulation extension layer, the insulation extension layer may have high extensibility in the filling process, so that the insulation extension layer may relatively easily fill the line gap, the thickness of the insulation extension layer may be relatively small, and thus the total thickness of the flexible extension plate 322 may be relatively small.

Since the thickness of the flexible extension plate 322 can be relatively small, it is beneficial to improve the flexibility, bending fatigue life, and assembling flexibility of the flexible extension plate 322.

Fig. 8 to 11 illustrate another battery protection plate 1320 provided in an embodiment of the present application. The battery protection plate 1320 may be applied to any one of the battery modules 30 of fig. 2 to 4. Similar to the battery protection plate 320 shown in fig. 5 to 7, the battery protection plate 1320 shown in fig. 8 to 11 may be divided into a hard protection plate 1321 and a flexible extension plate 1322. A plurality of conductive layers (e.g., the conductive layer 15101, the conductive layer 15102, the conductive layer 15103, and the conductive layer 15104 shown in fig. 8), a plurality of insulating layers (e.g., the insulating layer 15201 and the insulating layer 15202 shown in fig. 8), a first hard insulating layer 1531, a second hard insulating layer 1532, a first hard cover layer 1541, and a second hard cover layer 1542 may be provided over the hard protective plate 1321. A first flexible covering layer 1631, a second flexible covering layer 1632, a first adhesive layer 1621, and a second adhesive layer 1622 may be disposed on the flexible extending plate 1322.

Unlike the battery protection sheet 320 shown in fig. 5 to 7, the battery protection sheet 1320 shown in fig. 8 to 11 may include a first conductive layer 1410, a second conductive layer 1420, a third conductive layer 1450, a first flexible insulating layer 1430, and a second flexible insulating layer 1460, which are stacked. Second conductive layer 1420 may be located between first conductive layer 1410 and third conductive layer 1450. A first flexible insulating layer 1430 may be located between the first conductive layer 1410 and the second conductive layer 1420 to insulate the first conductive layer 1410 from the second conductive layer 1420. A second flexible insulating layer 1460 may be located between the second conductive layer 1420 and the third conductive layer 1450 to insulate the second conductive layer 1420 from the third conductive layer 1450. The first conductive layer 1410, the second conductive layer 1420, the third conductive layer 1450, the first flexible insulating layer 1430, the second flexible insulating layer 1460 may be distributed on the hard protection plate 1321 and the flexible extension plate 1322.

As shown in fig. 9, a first conductive layer 1410, a second conductive layer 1420, and a third conductive layer 1450 may have a wiring disposed thereon.

The first conductive layer 1410 may include a first line 1411. The second conductive layer 1420 may include a plurality of control lines 1413. The third conductive layer 1450 may include a second line 1412. In one example, the first line 1411 may be a positive line and the second line 1412 may be a negative line. In another example, the first line 1411 may be a negative line and the second line 1412 may be a positive line.

In order to reduce the impedance of the battery assembly, the thicknesses, the transverse dimensions and the like of the first line 1411 and the second line 1412 can be relatively large, so that the flowing currents of the first line 1411 and the second line 1412 can be increased. That is, the first and

second lines

1411, 1412 may be relatively thick and wide. In one example, most (i.e., more than half) or all of the area of the first conductive layer 1410 may be used to form the first line 1411. In one example, most or all of the area of the third conductive layer 1450 may be used to form the second line 1412. Alternatively, the second conductive layer 1420 may not have the positive electrode line and the negative electrode line.

The impedance requirements of the control line 1413 may be relatively low. To reduce the overall thickness of the flexible extension plate 1322, the thickness of the control wire 1413 may be relatively small. That is, the thickness of the second conductive layer 1420 may be relatively small. For example, the thickness of the second conductive layer 1420 may be smaller than the thickness of the first conductive layer 1410 or the third conductive layer 1450. Alternatively, most of the control lines 1413 of the flexible extension plates 1322 may be disposed on the second conductive layer 1420.

The battery protection plate 1320 may also include a plurality of pins. The plurality of pins may include, for example, a first pin 1445, a second pin 1446, and a plurality of control pins 1447. A plurality of pins may be disposed on the first conductive layer 1410, for example.

The first lead 1445 may be electrically connected to the first conductive layer 1410, so that the first lead 1445 may be electrically connected to the first line 1411. In the case where the first line 1411 is a positive line, the first pin 1445 may be a positive pin. In the case where the first line 1411 is a negative line, the first pin 1445 may be a negative pin.

The second lead 1446 may be electrically connected to the third conductive layer 1450 through the fourth electrical connection path 1434 passing through the first and second flexible insulating

layers

1430 and 1460, so that the second lead 1446 may be electrically connected to the second line 1412. The fourth electrical connection pathway 1434 may be formed by one or more electrical connections. In the case where the second line 1412 is a negative line, the second pin 1446 may be a negative pin. In the case where the second line 1412 is a positive line, the second pin 1446 may be a positive pin.

Since the second lead 1446 is disposed on the first conductive layer 1410, the second lead 1446 may not be electrically connected to the first line 1411 on the first conductive layer 1410. Accordingly, the first conductive layer 1410 may include a first electrical connection region 1415 (e.g., a via pad). A second lead 1446 may be disposed on the first electrical connection region 1415. The first electrical connection region 1415 may be insulated from the first wire 1411. A cross-section of the flexible extension plate 1322 taken along the X-direction shown in fig. 9 can be seen as shown in fig. 10. As shown in fig. 10, the first conductive layer 1410 may have the second lead 1446 disposed on the first electrical connection region 1415, and the first insulating member 4161 may be disposed between the first electrical connection region 1415 and the first wire 1411. Thereby, it is possible to advantageously prevent the second wiring 1412 from being short-circuited with the first wiring 1411.

A plurality of control pins 1447 may be electrically connected to a corresponding plurality of control lines 1413. The control pin 1447 may be electrically connected to one control line 1413 on the second conductive layer 1420 through an electrical connection path 1435 passing through the first flexible insulating layer 1430.

Fig. 11 is a B-B sectional view shown in fig. 8.

Since the second conductive layer 1420 may have a plurality of control lines 1413 arranged thereon, and a line gap 1425 may exist between two adjacent control lines 1413, the second conductive layer 1420 may have a plurality of line gaps 1425. Optionally, a third flexible insulating layer 1470 may also be disposed on the flexible extension plate 1322. A third flexible insulating layer 1470 may be located between the first flexible insulating layer 1430 and the second conductive layer 1420. A third flexible insulating layer 1470 may cover a side of the second conductive layer 1420 adjacent to the first flexible insulating layer 1430, and may be filled in the line slit 1425 of the second conductive layer 1420. The third flexible insulating layer 1470 may be in contact with the second flexible insulating layer 1460.

In the example shown in fig. 11, the third flexible insulating layer 1470 may use a gel such as a photosensitive gel, a thermosetting gel, and an epoxy resin. The third flexible insulating layer 1470 may be filled in the wiring slits 1425 of the second conductive layer 1420 by heat, pressure, or the like, and the first flexible insulating layer 1430 and the second conductive layer 1420 may be adhered together.

In other examples, the third flexible insulating layer 1470 may include a first portion, a second portion. The materials of the first and second portions may be different. The first portion may be an insulation extension material having high ductility at high temperature, such as ink having high ductility, etc. (the first portion may refer to the first insulation extension layer 611 as shown in fig. 5 to 7). The first portion may be non-tacky. The first portion may be filled in the line gap 1425 of the second conductive layer 1420. The first portion may be in contact with the second flexible insulating layer 1460. The second portion may have a tacky nature. The second portion may be used to affix the first portion to the first flexible insulating layer 1430. The material of the first portion may be a first material and the material of the second portion may be a second material, the first material having a lower viscosity than the second material when the first and second materials are heated or processed.

In one example, the thickness of the first flexible cover layer 1631 may be about 12.5 μm. The thickness of the second flexible cover layer 1632 may be about 12.5 μm. The thickness of the first glue layer 1621 may be about 12.5 μm. The thickness of second glue layer 1622 may be about 12.5 μm. The thickness of the first conductive layer 1410 may be about 90 μm. The thickness of the second conductive layer 1420 may be about 20 μm. Third conductive layer 1450 may be approximately 90 μm thick. The thickness of the first flexible insulating layer 1430 may be about 12.5 μm. The thickness of the second flexible insulating layer 1460 can be about 25 μm. The thickness of the third flexible insulating layer 1470 may be about 25m. The total thickness of the flexible extension plates 1322 may be approximately 307.5 μm.

Since the control signal is provided on one conductive layer alone, the thickness of the conductive layer on which the control signal is provided can be relatively small. Then, the depth of the line gap 1425 formed by the conductive layer may be relatively small. The insulating material can more easily fill the line gap 1425. Accordingly, the thickness of the insulating material may be slightly reduced, which may result in a relatively small overall thickness of the flexible extension plate 1322. Because the thickness of the flexible extension plate 1322 can be relatively small, it is advantageous to enhance the flexibility, bending fatigue life, and assembling flexibility of the flexible extension plate 1322.

Fig. 12 to 17 are another battery protection plate 2320 provided in an embodiment of the present application. The battery protection plate 2320 may be applied to any of the battery modules 30 in fig. 2 to 4. Similar to the battery protection plate 1320 shown in fig. 8 to 11, the battery protection plate 2320 shown in fig. 12 to 17 may be divided into a hard protection plate 2321 and a flexible extension plate 2322. The hard protection plate 2321 may be provided with a plurality of conductive layers (e.g., the conductive layer 25101, the conductive layer 25102, the conductive layer 25103, and the conductive layer 25104 shown in fig. 12), a plurality of insulating layers (e.g., the insulating layer 25201 and the insulating layer 25202 shown in fig. 12), a first hard insulating layer 2531, a second hard insulating layer 2532, a first hard coating layer 2541, and a second hard coating layer 2542. The flexible extending plate 2322 may be provided with a first flexible covering layer 2631, a second flexible covering layer 2632, a first adhesive layer 2621 and a second adhesive layer 2622. The battery protection board 2320 may further include a first conductive layer 2410, a second conductive layer 2420, a third conductive layer 2450, a first flexible insulating layer 2430, a second flexible insulating layer 2460, a third flexible insulating layer 2470. The first conductive layer 2410, the second conductive layer 2420, the third conductive layer 2450, the first flexible insulating layer 2430 and the second flexible insulating layer 2460 may be distributed on the hard protection plate 2321 and the flexible extension plate 2322. The first conductive layer 2410 may include a first line 2411. The second conductive layer 2420 may include a plurality of control lines 2413. The third conductive layer 2450 may include a second line 2412. Here, the relative positions of the first conductive layer 2410, the second conductive layer 2420, the third conductive layer 2450, the first flexible insulating layer 2430, the second flexible insulating layer 2460, and the third flexible insulating layer 2470 shown in fig. 12 to 17 are different from the relative positions of the first conductive layer 1410, the second conductive layer 1420, the third conductive layer 1450, the first flexible insulating layer 1430, the second flexible insulating layer 1460, and the third flexible insulating layer 1470 shown in fig. 8 to 11.

In the example shown in fig. 12-17, the first conductive layer 2410 may be located between the second conductive layer 2420 and the third conductive layer 2450. That is, the conductive layer where the first line 2411 is located may be located between the conductive layer where the second line 2412 is located and the conductive layer where the control line 2413 is located. Control lines 2413 may be located on the skin of flexible extension plate 2332. The first flexible insulating layer 2430 may be located between the first conductive layer 2410 and the second conductive layer 2420 to insulate the first conductive layer 2410 and the second conductive layer 2420. A second flexible insulating layer 2460 may be located between the first conductive layer 2410 and the third conductive layer 2450 to insulate the first conductive layer 2410 and the third conductive layer 2450. A third flexible insulating layer 2470 can be adhered between the first flexible insulating layer 2430 and the first conductive layer 2410.

As shown in fig. 13, the battery protection plate 2320 may further include a plurality of pins. The plurality of pins may include, for example, a first pin 2445, a second pin 2446, and a plurality of control pins 2447. A plurality of pins may be disposed on the second conductive layer 2420, for example.

The first pin 2445 may be electrically connected with the first conductive layer 2410 through an electrical connection path 2436 passing through the first flexible insulating layer 2430, so that the first pin 2445 may be electrically connected with the first line 2411.

The second pin 2446 can be electrically connected to the third conductive layer 2450 through a fifth electrical connection path 2437 passing through the first and second flexible insulating

layers

2430 and 2460, so that the second pin 2446 can be electrically connected to the second line 2412.

The plurality of control pins 2447 can be electrically connected to a corresponding plurality of control lines 2413.

Since the fifth electrical connection path 2437 between the second pin 2446 and the second conductive layer 2420 can pass through the first conductive layer 2410, the second pin 2446 cannot be electrically connected with the first line 2411 on the first conductive layer 2410. Therefore, the fifth electrical connection path 2437 between the second pin 2446 and the second conductive layer 2420 can be insulated from the first line 2411 on the first conductive layer 2410 to prevent the second line 2412 from being shorted with the first line 2411. A cross section of the flexible extension plate 2322 viewed in the X direction shown in fig. 13 can be obtained as sectional views shown in fig. 14 to 16.

As shown in fig. 14, the first conductive layer 2410 may include a second electrical connection region 2417. The fifth electrical connection path 2437 through the first and second flexible insulating

layers

2430, 2460 can include a first electrical connection 24371 and a second electrical connection 24372. The first electrical connection 24371 may extend through the first flexible insulating layer 2430, the third flexible insulating layer 2470, and electrically connect between the second pin 2446 and the second electrical connection region 2417. A second electrical connection 24372 may extend through second flexible insulating layer 2460 and electrically connect between second line 2412 and second electrical connection area 2417. A second insulating member 4162 may be disposed in a spaced space between the first line 2411 of the first conductive layer 2410 and the second electrical connection region 2417. That is, the second insulating member 4162 may be filled in the space between the first line 2411 and the second electrical connection region 2417. The second insulating member 4162 may be connected between the first line 2411 and the second electrical connection region 2417. The second insulating member 4162 may be located between the first flexible insulating layer 2430 (or the third flexible insulating layer 2470) and the second flexible insulating layer 2460. Thereby, it may be advantageous to prevent the second line 2412 from being short-circuited with the first line 2411. In one example, the second electrical connection region 2417 may be circular. The second insulating member 4162 may have a circular ring shape and be disposed around the outer circumference of the second electrical connection region 2417. The outer side surface of the second insulating member 4162 may be in contact with the first line 2411. The inner side of the second insulating member 4162 may be in contact with the second electrical connection region 2417. An end surface of the second insulating member 4162 may be in contact with the first flexible insulating layer 2430 or the second flexible insulating layer 2460 or the third flexible insulating layer 2470. Wherein the end face may be arranged perpendicularly with respect to the side face.

As shown in fig. 15, the battery protection board 2320 may include a third electrical connector 24373. The third electrical connection 24373 can pass through the first, second, and third flexible insulating

layers

2430, 2460, 2470 to form the fifth electrical connection path 2437 described above. A third insulating member 4163 may be disposed in a space between the first line 2411 of the first conductive layer 2410 and the third electric connection member 24373. That is, the third insulating member 4163 may be filled in a space between the first wiring 2411 and the third electric connection member 24373. The third insulating member 4163 may be connected between the first line 2411 and the third electric connection 24373. The third insulating member 4163 may be located between the first flexible insulating layer 2430 (or the third flexible insulating layer 2470) and the second flexible insulating layer 2460. Thereby, it may be advantageous to prevent the second line 2412 from being short-circuited with the first line 2411. In one example, third electrical connection 24373 may be cylindrical. The third insulating member 4163 may have a circular ring shape and be disposed around the outer circumference of the third electrical connector 24373. An outer side surface of the third insulating member 4163 may contact the first line 2411. The inner side surface of the third insulating member 4163 may contact the third electrical connector 24373. An end surface of the third insulating member 4163 may be in contact with the first flexible insulating layer 2430 or the second flexible insulating layer 2460 or the third flexible insulating layer 2470.

As shown in fig. 16, the first conductive layer 2410 may include a second electrical connection region 2417. The fifth electrical connection path 2437 through the first and second flexible insulating

layers

2430, 2460 can include a fourth electrical connection 24374 and a fifth electrical connection 24375. Fourth electrical connection 24374 may extend through first flexible insulating layer 2430, third flexible insulating layer 2470, and be electrically connected between second pin 2446 and second electrical connection area 2417. A fifth electrical connection 24375 can extend through second flexible insulating layer 2460 and electrically connect between second line 2412 and second electrical connection area 2417. Here, the first flexible insulating layer 2430 or the second flexible insulating layer 2460 or the third flexible insulating layer 2470 may be filled in a space between the first line 2411 and the second electrical connection region 2417 of the first conductive layer 2410. As shown in fig. 16, a first portion of the second flexible insulating layer 2460 may be filled in a space between the first line 2411 and the second electrical connection region 2417 of the first conductive layer 2410. A second portion of the second flexible insulating layer 2460 may cover the second electrical connection region 2417 and the first line 2411. A first portion of the second flexible insulating layer 2460 can be connected between the first line 2411 and the second electrical connection region 2417. The first portion of the second flexible insulating layer 2460 can be connected between the second portion of the first flexible insulating layer 2430 and the third flexible insulating layer 2470. Thereby, it is possible to advantageously prevent the second line 2412 from being short-circuited with the first line 2411. In one example, the second electrical connection region 2417 may be circular. The first portion of the second flexible insulating layer 2460 may have a circular ring shape and be disposed around the outer periphery of the second electrical connection region 2417. An outer side of the first portion of the second flexible insulating layer 2460 may be in contact with the first line 2411. An inner side of the first portion of the second flexible insulating layer 2460 may be in contact with the second electrical connection region 2417.

Fig. 17 is a cross-sectional view C-C of fig. 12.

A plurality of control lines 2413 may be arranged on the second conductive layer 2420. A line gap 2425 may exist between two adjacent control lines 2413, and thus the second conductive layer 2420 may form a plurality of line gaps 2425. The first glue layer 2621 of the flexible extending plate 2322 may cover a side of the second conductive layer 2420 away from the first flexible insulating layer 2430, and may fill in the circuit gap 2425 of the second conductive layer 2420. The first glue layer 2621 may be in contact with the first flexible insulating layer 2430.

In the example shown in fig. 17, the first paste layer 2621 may be filled in the wire slits 2425 of the second conductive layer 2420 by heat, pressure, or the like, and the first flexible coverlay 2631 and the second conductive layer 2420 may be pasted together.

In other examples, the battery protection plate 2320 may further include a first insulation extension layer (the first insulation extension layer may refer to the first insulation extension layer 611 as shown in fig. 5 to 7). The first insulating ductile layer may have high ductility at high temperature. The first insulation extension layer may cover a side of the second conductive layer 2420 away from the first flexible insulation layer 2430, and may fill in the wire gap 2425 of the second conductive layer 2420. The first insulating spreader layer may be in contact with the first flexible insulating layer 2430. A first glue layer 2621 may be attached between the first flexible cover layer 2631 and the first insulation displacement layer.

In one example, the thickness of the first flexible overlay 2631 may be about 12.5 μm. The thickness of the second flexible overlay 2632 may be about 12.5 μm. The thickness of the first glue layer 2621 may be about 20 μm. The thickness of the second glue layer 622 may be about 12.5 μm. The thickness of the first conductive layer 2410 may be about 90 μm. The thickness of the second conductive layer 2420 may be about 20 μm. The thickness of the third conductive layer 2450 can be about 90 μm. The thickness of the first flexible insulating layer 2430 may be about 25 μm. The thickness of the second flexible insulating layer 2460 may be about 12.5 μm. The thickness of the third flexible insulating layer 2470 may be about 12.5 μm. The total thickness of the flexible extension plate 2322 may be approximately 307.5 μm.

Since the control signal is provided separately on one of the conductive layers, the thickness of the conductive layer on which the control signal is provided can be relatively small. Then, the depth of the line slit 2425 formed by the conductive layer may be relatively small. The insulating material can more easily fill the wire gap 2425. Accordingly, the thickness of the insulating material may be slightly reduced, and thus the total thickness of the flexible extension plate 2322 may be made relatively small. Since the thickness of the flexible extension plate 2322 may be relatively small, it is beneficial to improve the bendability, the bending fatigue life, the assembly flexibility, and the like of the flexible extension plate 2322.

Alternatively, in other examples, the number of the conductive layers distributed on the flexible extension plate 2322 and the hard protection plate 2321 may be more, for example, there may be 4 conductive layers, or a plurality of conductive layers with more than 4 layers.

The lines shown in fig. 6, 9, and 13 may be signal-functional lines. In some examples, the conductive layer may include a line having no signal function (none of fig. 6, 9, and 13) in addition to the control line, the first line, and the second line. If these circuits without signal function are removed, it is advantageous to further reduce the total thickness of the flexible extension board, and further, the flexibility, bending fatigue life, and assembling flexibility of the flexible extension board can be improved.

The battery protection plate provided by the embodiment of the present application may have a relatively thin thickness without substantially affecting the impedance performance. This is advantageous for reducing the space occupied by the battery protection board in the electronic device, and further, can provide a space occupied by other devices, such as a battery. Increasing the footprint of the battery may be beneficial to increasing the capacity of the battery. In addition, the thickness of the battery protection plate is reduced, so that the flexibility of the battery protection plate is improved, and the flexibility, the bending fatigue life, the assembling flexibility and the like of the flexible extension plate are improved.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A battery protection plate (320), the battery protection plate (320) can be divided into a hard protection plate (321) and a flexible extension plate (322), the battery protection plate (320) includes a first conductive layer (410), the first conductive layer (410) is distributed on the hard protection plate (321) and the flexible extension plate (322), a plurality of lines are disposed on the first conductive layer (410), and two adjacent lines are disposed at intervals to form a line gap, wherein the battery protection plate (320) further includes:

the first insulation extension layer (611), the first insulation extension layer (611) covers one side of the first conductive layer (410), and the first insulation extension layer (611) is filled in a line gap of the first conductive layer (410), and the material of the first insulation extension layer (611) is a first material;

a first flexible cover layer (631), the first flexible cover layer (631) being located on a surface of the flexible extension sheet (322);

a first adhesive layer (621), the first adhesive layer (621) being adhered between the first flexible cover layer (631) and the first insulation extension layer (611), the first adhesive layer (621) being made of a second material, wherein,

2. The battery protection plate (320) according to claim 1, wherein the first material comprises one or more of: polyimide PI and ink.

3. The battery protection plate (320) according to claim 1 or 2, wherein the second material comprises one or more of: thermosetting adhesive, photosensitive adhesive, and epoxy resin.

4. The battery protection plate (320) according to any one of claims 1 to 3, wherein the first conductive layer (410) comprises a first positive electrode line (411), a first negative electrode line (412), the battery protection plate (320) further comprising:

a second conductive layer (420), the second conductive layer (420) comprising a second positive line (421), a second negative line (422);

a first flexible insulating layer (430), the first flexible insulating layer (430) located between the first conductive layer (410) and the second conductive layer (420);

a first electrical connection via (431), the first electrical connection via (431) passing through the first flexible insulating layer (430) for electrically connecting the first positive wiring (411) with the second positive wiring (421);

a second electrical connection via (432), the second electrical connection via (432) passing through the first flexible insulating layer (430) for electrically connecting the first negative wiring (412) with the second negative wiring (422).

5. The battery protection plate (320) according to claim 4, wherein a control pin (444) is provided on the first conductive layer (410), the second conductive layer (420) further comprises a control line (423), the battery protection plate (320) further comprises:

a third electrical connection via (433), the third electrical connection via (433) passing through the first flexible insulating layer (430) for electrically connecting the control line (423) with the control pin (444).

6. A battery protection plate (1320), the battery protection plate (1320) being dividable into a rigid protection plate (1321) and a flexible extension plate (1322), characterized in that the battery protection plate (1320) comprises:

the flexible hard protection plate comprises a first conducting layer (1410), a second conducting layer (1420), a third conducting layer (1450), a first flexible insulating layer (1430) and a second flexible insulating layer (1460), wherein the first conducting layer (1410), the second conducting layer (1420), the third conducting layer (1450), the first flexible insulating layer (1430) and the second flexible insulating layer (1460) are arranged in a stacked mode, the first conducting layer (1410), the second conducting layer (1420), the first flexible insulating layer (1430) and the third conducting layer (1450) are distributed on the hard protection plate (1321) and the flexible extension plate (1322), the first flexible insulating layer (1430) is located between the first conducting layer (1410) and the second conducting layer (1420), the second flexible insulating layer (1460) is located between the second conducting layer (1420) and the third conducting layer (1450), a first line (1411) is arranged on the first conducting layer (1410), a plurality of control lines (1413) are arranged on the second conducting layer (1420), a second line (1412) is arranged on the third conducting layer (1450), and the first and the second conducting layer (1412) is a positive line, and the other positive line (1412).

7. The battery protection plate (1320) according to claim 6, wherein the thickness of the first conductive layer (1410) is greater than the thickness of the second conductive layer (1420), and the thickness of the third conductive layer (1450) is greater than the thickness of the second conductive layer (1420).

8. The battery protection plate (1320) according to claim 6 or 7, wherein two adjacent control lines (1413) of the second conductive layer (1420) are spaced apart to form a line gap, the battery protection plate (1320) further comprising:

a third flexible insulation layer (1470), wherein the third flexible insulation layer (1470) is filled in the circuit gap and adhered between the second conductive layer (1420) and the first flexible insulation layer (1430).

9. The battery protection plate (1320) according to claim 8, wherein the third flexible insulating layer (1470) includes:

a second portion adhered between the first portion and the first flexible insulating layer (1430), the second portion being of a second material, wherein,

10. The battery protective plate (1320) according to claim 9, wherein the first material comprises one or more of the following: polyimide PI and ink.

11. The battery protection plate (1320) according to claim 9 or 10, wherein the second material comprises one or more of the following: thermosetting adhesive, photosensitive adhesive, and epoxy resin.

12. The battery protection plate (1320) according to any one of claims 6 to 11, wherein a pin is provided on the first conductive layer (1410), the battery protection plate (1320) further comprising:

a fourth electrical connection via (1434), the fourth electrical connection via (1434) passing through the first flexible insulating layer (1430), the second flexible insulating layer (1460) for electrically connecting the pin with the second wire (1412);

a first insulating member (4161), the first insulating member (4161) disposed within the first conductive layer (1410) between the fourth electrical connection via (1434) and the first wire (1411) for spacing the fourth electrical connection via (1434) from the first wire (1411).

13. A battery protection plate (2320), the battery protection plate (2320) being dividable into a rigid protection plate (2321) and a flexible extension plate (2322), the battery protection plate (2320) comprising:

the flexible printed circuit board comprises a first conductive layer (2410), a second conductive layer (2420), a third conductive layer (2450), a first flexible insulating layer (2430) and a second flexible insulating layer (2460) which are arranged in a stacked mode, wherein the first conductive layer (2410), the second conductive layer (2420), the third conductive layer (2450), the first flexible insulating layer (2430) and the second flexible insulating layer (2460) are distributed on the hard protection plate (2321) and the flexible extension plate (2322), the first conductive layer (2410) is located between the second conductive layer (2420) and the third conductive layer (2450), the first flexible insulating layer (2430) is located between the first conductive layer (2410) and the second conductive layer (2420), the second flexible insulating layer (2460) is located between the first conductive layer (2410) and the third conductive layer (2450), a first circuit (2411) is arranged on the first conductive layer (2410), a plurality of control circuits (3) are arranged on the second conductive layer (2420), and the second circuit (2412) is arranged on the first conductive layer (2412), and the second wiring (2412).

14. The battery protection plate (2320) according to claim 13, wherein the thickness of the first conductive layer (2410) is greater than the thickness of the second conductive layer (2420), and the thickness of the third conductive layer (2450) is greater than the thickness of the second conductive layer (2420).

15. The battery protection plate (2320) according to claim 13 or 14, wherein two adjacent control wires (2413) of the second conductive layer (2420) are arranged at intervals to form a wire gap, and the battery protection plate (2320) further comprises:

a first flexible cover layer (2631), the first flexible cover layer (2631) being located on a surface of the flexible extension plate (2322);

a first layer of glue (2621), said first layer of glue (2621) being glued between said first flexible covering layer (2631) and said first layer of insulation stretch, the material of said first layer of glue (2621) being a second material, wherein,

16. The battery protection plate (2320) according to claim 15, wherein the first material comprises one or more of: polyimide PI and ink.

17. The battery protection plate (2320) according to claim 15 or 16, wherein the second material comprises one or more of: thermosetting adhesive, photosensitive adhesive and epoxy resin.

18. The battery protection plate (2320) according to any one of claims 13 to 17, wherein a pin (446) is provided on the first conductive layer (2410), the battery protection plate (2320) further comprising:

a fifth electrical connection path (2437), the fifth electrical connection path (2437) passing through the first flexible insulating layer (2430), the second flexible insulating layer (2460) for electrically connecting the pin (446) with the second line (2412);

a second insulating member disposed within the first conductive layer (12410) between the fifth electrical connection path (2437) and the first line (2411) for spacing the fifth electrical connection path (2437) from the first line (2411).

19. The battery protection plate (2320) according to claim 18, wherein the fifth electrical connection path (2437) includes:

an electrical connection region (2417), the electrical connection region (2417) being disposed within the first conductive layer (2410) and spaced apart from the first line (2411), the second insulating member (4162) being located between the first line (2411) and the electrical connection region (2417);

a first electrical connection (24371) through the first flexible insulating layer (2430) and electrically connected between the pin (2446) and the electrical connection region (2417);

a second electrical connection (24372) passing through the second flexible insulating layer (2460) and electrically connected between the electrical connection region (2417) and the second line (2412).

20. The battery protection plate (2320) according to claim 18, wherein the fifth electrical connection path (2437) includes:

a third electrical connection (24373) passing through the first flexible insulating layer (2430), the second flexible insulating layer (2460), and electrically connected between the pin (2446) and the second wire (2412), wherein,

the second insulating member (4163) is located between the first and second flexible insulating layers (2430, 2460) and between the first and third electrical connections (2411, 24373) for spacing the third electrical connection (24373) from the first line (2411).

21. The battery protection plate (2320) according to any one of claims 13 to 17, wherein a pin (2446) is provided on the first conductive layer (2410), the battery protection plate (2320) further comprising:

a fifth electrical connection via (2437), the fifth electrical connection via (2437) passing through the first flexible insulating layer (2430), the second flexible insulating layer (2460) for electrically connecting the pin (2446) with the second line (2412);

wherein the first flexible insulating layer (2430) or the second flexible insulating layer (2460) is filled between the fifth electrical connection via (2437) and the first line (2411) for spacing the fifth electrical connection via (2437) from the first line (2411).

22. A battery pack (30) characterized by comprising a battery (310) and a battery protection plate electrically connected to a positive electrode and a negative electrode of the battery (310), the battery protection plate being the battery protection plate (320) of any one of claims 1 to 5, or the battery protection plate (1320) of any one of claims 6 to 12, or the battery protection plate (2320) of any one of claims 13 to 21.

23. An electronic device (100) characterized by comprising a battery (310) and a battery protection plate electrically connected to a positive electrode and a negative electrode of the battery (310), the battery protection plate being the battery protection plate (320) of any one of claims 1 to 5, or the battery protection plate (1320) of any one of claims 6 to 12, or the battery protection plate (2320) of any one of claims 13 to 21.