Plate body for battery pack shell, battery pack and electric device

Abstract

The utility model provides a plate body for a battery pack shell, a battery pack and an electric device, and relates to the technical field of power batteries, the plate body is internally provided with a mounting cavity, the plate body is provided with a vent hole communicated with the mounting cavity, and the mounting cavity is internally and rotatably provided with a plurality of heat preservation sheets arranged at intervals and an adjusting mechanism; the multiple heat preservation pieces are located between the vent holes in the two sides and have the heat preservation state that the multiple heat preservation pieces are sequentially connected together in a lap joint mode and the heat dissipation state that a heat dissipation channel is formed between every two adjacent heat preservation pieces. The adjusting mechanism comprises a pull wire, and the pull wire drives the heat preservation piece to be switched between a heat preservation state and a heat dissipation state. According to the plate body for the battery pack shell disclosed by the utility model, the plurality of heat preservation sheets are lapped together in a heat preservation state to form a heat preservation plate, so that the heat preservation performance of a battery pack is improved, and when the plurality of heat preservation sheets are in a heat dissipation state, a heat dissipation channel is formed between every two adjacent heat preservation sheets, so that the heat dissipation of the battery pack is facilitated; and the use performance of the battery pack is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery pack technical field, especially a kind of plate body for battery pack shell, battery pack and electric device. BACKGROUND

[0002] At present, battery pack will be heated by heating film or liquid heating system, but both of these two ways need certain time and consume a large part of electric energy. Moreover, battery pack can only take relatively limited heat preservation measures according to specific working conditions due to the contradiction between heat preservation performance and heat dissipation performance. The heat preservation performance and heat dissipation performance of battery pack are often mutually restrictive, and the heat dissipation performance of battery pack with good heat preservation performance must be poor. When battery pack temperature is too high and needs to be cooled, heat can only be dissipated through water cooling system, causing low battery pack heat dissipation rate, high battery pack temperature, reduced charge-discharge rate, and reduced service life and safety. SUMMARY

[0003] Therefore, the utility model aims at providing a kind of plate body for battery pack shell to facilitate the heat dissipation and heat preservation of battery pack, and improve the use performance of battery pack.

[0004] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0005] A kind of plate body for battery pack shell, installation cavity is equipped in the plate body, air hole is respectively equipped in the two side walls of the thickness direction of the plate body and is communicated with the installation cavity, multiple heat preservation sheets are rotatably arranged in the installation cavity, and adjusting mechanism for adjusting the rotation angle of multiple heat preservation sheets is arranged in the installation cavity.

[0006] Multiple heat preservation sheets are located between the air holes on both sides, and multiple heat preservation sheets have heat preservation state of being overlapped in sequence and heat dissipation state of forming heat dissipation channel between adjacent two heat preservation sheets.

[0007] The adjusting mechanism includes pull wire connected with multiple heat preservation sheets respectively, the pull wire can be triggered to move and drive multiple heat preservation sheets to rotate synchronously, so that the heat preservation sheet is switched between the heat preservation state and the heat dissipation state.

[0008] Further, the adjusting mechanism includes two wire winding parts corresponding to the two ends of the pull wire and rotatably arranged in the installation cavity.

[0009] One of the wire winding parts can be driven by external force to unwind the pull wire, and the other wire winding part can be driven by external force to wind the pull wire, so as to adjust the rotation angle of the adjusting plate.

[0010] Further, two ends of the installation cavity are respectively provided with partitions, and the installation cavity is divided into a middle cavity body located in the middle part and end cavity bodies respectively arranged at two opposite sides of the middle cavity body.

[0011] The ventilation holes are communicated with the middle cavity body, a plurality of the heat preservation sheets are rotationally arranged in the middle part, the winding lines are respectively arranged in the end cavity bodies, and the pull lines pass through the corresponding partitions.

[0012] Further, the adjusting mechanism further comprises a driving part corresponding to each winding line part, a power output end of the driving part is connected with the corresponding winding line part, and the winding line part is driven to rotate.

[0013] Further, the driving part is an electric motor, and / or the winding line part comprises a winding box.

[0014] Further, the pull lines are connected with rotation sides of the heat preservation sheets respectively and / or,

[0015] The adjusting mechanism is two adjusting mechanisms arranged at intervals along the length direction of the heat preservation sheets.

[0016] Further, the heat preservation sheet comprises a sheet body and a heat preservation layer arranged outside the sheet body.

[0017] Further, the heat preservation layer is made of any one of heat preservation cotton, heat preservation glue or heat preservation felt.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] The plate body for the battery pack shell is rotationally arranged with a plurality of heat preservation sheets in the installation cavity, the plurality of heat preservation sheets are overlapped together to form a heat preservation plate in a heat preservation state through the movement of the pull lines, thereby improving the heat preservation performance of the battery pack, the heat preservation sheets form a heat dissipation channel between adjacent two heat preservation sheets through the movement of the pull lines, thereby facilitating the heat dissipation of the battery pack, the battery pack is in a suitable working temperature, and the use performance of the battery pack is further ensured.

[0020] In addition, the two winding parts are matched, so that the adjusting effect and stability of the pull wire are improved. The middle cavity and the end cavity are separated by the partition, so that the heat preservation and heat dissipation effect of the heat preservation sheet are further improved. The driving part is arranged, so that the winding part is driven to rotate, the heat preservation sheet is rotated by the pull wire, and the convenience of the heat preservation sheet in the heat preservation state and the heat dissipation state is improved. The mature motor is beneficial to output the rotary driving force; the winding box is beneficial to winding and unwinding of the pull wire, so that the use effect is good. The pull wire is connected to the rotating side of the heat preservation sheet, and has the advantages of convenient installation and good adjusting effect; the two adjusting mechanisms are matched, so that the stability of the heat preservation sheet in the rotating adjustment is improved. The sheet body and the heat preservation layer are matched, so that the heat preservation performance of the heat preservation sheet in the heat preservation state is ensured. The heat preservation cotton, the heat preservation glue and the heat preservation felt all have good heat preservation performance and are easy to arrange and implement.

[0021] In addition, another purpose of the utility model is to provide a battery pack, the shell of the battery pack is provided with the plate body for battery pack shell as described above, the battery pack is provided with a first temperature detection part for detecting the internal temperature of the battery pack, and a second temperature detection part for detecting the external environment temperature of the battery pack;

[0022] When the internal temperature of the battery pack and / or the external temperature of the battery pack exceeds the corresponding temperature threshold, the pull wire is triggered to rotate the heat preservation sheet between the heat preservation state and the heat dissipation state.

[0023] The battery pack has the plate body for battery pack shell, the first temperature detection part and the second detection part, which are beneficial to triggering the pull wire according to the internal and external temperature of the battery pack, adjusting the state of the heat preservation sheet, keeping the battery pack in a reasonable temperature range, and improving the use performance of the battery pack.

[0024] In addition, the utility model also provides a kind of electric device, and the electric device is provided with the battery pack as described above.

[0025] The electric device has the same beneficial effects as the battery pack described above, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application, and are incorporated herein for illustration only. The application will be described and explained with additional specificity and detail by the accompanying drawings in which:

[0027] Figure 1 The structure diagram of the plate body for battery pack shell described in the embodiments of the utility model;

[0028] Figure 2 The structure diagram of the plate body for battery pack shell described in the embodiments of the utility model;Figure 1 a structure schematic view of the heat preservation sheet in the A-A direction in Fig.

[0029] Figure 3 a structure schematic view of the heat preservation sheet in the A-A direction in Fig. Figure 1 a structure schematic view of the heat preservation sheet in the A-A direction in Fig.

[0030] Figure 4 an internal structure schematic view of the plate body for the battery pack shell.

[0031] Explanation of reference signs:

[0032] 1, plate body; 2, heat preservation sheet; 3, pull wire; 4, wire winding box; 5, motor;

[0033] 100, intermediate cavity; 200, end cavity; 300, heat dissipation channel;

[0034] 101, air hole; 102, partition plate. DETAILED DESCRIPTION

[0035] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0036] In the description of the present application, it should be noted that if the terms indicating the orientation or position relationship such as "upper", "lower", "inner", "back" appear, they are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the device or element to have a specific orientation, to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, if the terms "first", "second" appear, they are also only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0037] The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0038] Embodiment one

[0039] The present embodiment relates to a plate body for a battery pack shell, to solve the problem that the plate body 1 in the prior art can only dissipate heat or keep warm, thereby being not conducive to the use performance of the battery pack.

[0040] In terms of overall structure, the plate body 1 is internally provided with a mounting cavity, and the two side walls in the thickness direction of the plate body 1 are respectively provided with air holes 101 communicating with the mounting cavity. The mounting cavity is rotatably provided with a plurality of heat preservation plates 2 arranged at intervals, and an adjusting mechanism for adjusting the rotation angle of the plurality of heat preservation plates 2. Among them, the plurality of heat preservation plates 2 are located between the air holes 101 on the two sides, and the plurality of heat preservation plates 2 have a heat preservation state of being overlapped in sequence and a heat dissipation state of forming a heat dissipation channel 300 between adjacent two heat preservation plates 2. The adjusting mechanism includes a pull wire 3 connected to each of the plurality of heat preservation plates 2. The pull wire 3 can be triggered to move and drive the plurality of heat preservation plates 2 to rotate synchronously, so as to switch the heat preservation plates 2 between the heat preservation state and the heat dissipation state.

[0041] The plate body for battery pack shell described in the embodiment is rotatably provided with a plurality of heat preservation plates 2 in the mounting cavity. By moving the pull wire 3, the plurality of heat preservation plates 2 are overlapped together to form a heat preservation plate in the heat preservation state, thereby improving the heat preservation performance of the battery pack. By moving the pull wire 3, the heat preservation plates 2 have a heat dissipation channel 300 formed between adjacent two heat preservation plates 2, which is beneficial to the heat dissipation of the battery pack, so that the battery pack is at a suitable working temperature, thereby ensuring the use performance of the battery pack.

[0042] Based on the overall introduction as above, an exemplary structure of the plate body for battery pack shell described in the embodiment is shown in Figures 1 to 4 . In the embodiment, the plate body 1 can be a bottom guard plate, a top cover, a side plate, an end plate, etc. of the battery pack shell. Preferably, the plate body 1 is a bottom guard plate or a top cover to improve the heat dissipation and heat preservation performance of the battery pack. The plurality of heat preservation plates 2 are arranged in the width direction of the plate body 1 and are arranged at intervals in the length direction of the plate body 1. Among them, the plurality of heat preservation plates 2 are arranged in parallel with each other, which is beneficial to the synchronous rotation of the heat preservation plates 2. In the embodiment, the pull wire 3 is connected to the rotation side of each heat preservation plate 2, which is beneficial to driving the heat preservation plates 2 to rotate and is convenient to arrange and implement.

[0043] In some embodiments, referring to Figure 3 , the rotation shaft of the heat preservation plate 2 is located at the middle part of the two ends of the heat preservation plate 2. At this time, the rotation side of the heat preservation plate 2 is the two sides in the width direction of the heat preservation plate 2. Taking the viewing angle in the figure as the reference, the rotation side is the top side or the bottom side of the heat preservation plate 2. If the rotation shaft of the heat preservation plate 2 is located at the side part of the heat preservation plate 2, the rotation side is arranged opposite to the side with the rotation shaft.

[0044] In specific implementation, a connecting hole or a hook and other structures beneficial to the connection with the pull wire 3 can be arranged on the rotation side of the heat preservation plate 2. It is necessary to ensure that the heat preservation plate 2 cannot slide relative to the pull wire 3 in the connected state, so that the length of the wire body between adjacent two heat preservation plates 2 remains consistent, thereby facilitating the adjustment of the rotation angle of the heat preservation plate 2. In Figure 2 and Figure 3With the middle angle as the reference, the angle between the heat preservation sheet 2 and the plate body 1 increases when the pull wire 3 moves to the left, and the angle between the heat preservation sheet 2 and the plate body 1 decreases when the pull wire 3 moves to the right.

[0045] To improve the convenience of the pull wire 3 in use, the adjusting mechanism includes two winding parts arranged in the installation cavity corresponding to the two ends of the pull wire 3. One winding part can be driven by external force to unwind the pull wire 3, and the other winding part can be driven by external force to wind the pull wire 3, so that the pull wire 3 can be moved left and right, and the rotating angle of the heat preservation plate 2 can be adjusted. The cooperation of the two winding parts can improve the adjusting effect and stability of the pull wire 3.

[0046] As shown in Figures 2 to 4 , the winding part includes a winding box 4, and a winding shaft is arranged to rotate in the winding box 4. The winding shaft can be rotated to wind or unwind the pull wire 3. In specific operation, when it is needed to switch the heat preservation sheet 2 from the heat preservation state to the heat dissipation state, the winding shaft of the left-end winding box 4 is used to wind the pull wire 3, and the winding shaft of the right-end winding box 4 is used to unwind the pull wire 3, so that the pull wire 3 moves to the left, and the plurality of heat preservation sheets 2 rotate under the driving of the pull wire 3, the angle between each heat preservation sheet 2 and the plate body 1 increases, and the heat dissipation channel 300 between the adjacent two heat preservation sheets 2 is opened.

[0047] When it is needed to switch the heat preservation sheet 2 from the heat dissipation state to the heat preservation state, the winding shaft of the left-end winding box 4 is used to unwind the pull wire 3, and the winding shaft of the right-end winding box 4 is used to wind the pull wire 3 to move to the right. The pull wire 3 drives the plurality of heat preservation sheets 2 to rotate under the driving of the pull wire 3, the angle between each heat preservation sheet 2 and the plate body 1 decreases, and the plurality of heat preservation sheets 2 are sequentially overlapped to close the heat dissipation channel 300.

[0048] As a preferred embodiment, as shown in Figure 2 and Figure 3 , the two ends of the installation cavity are respectively provided with partitions 102, and the two partitions 102 divide the installation cavity into a middle cavity 100 located in the middle part and end cavity 200 located on the opposite sides of the middle cavity 100. The air vent hole 101 communicates with the middle cavity 100, the plurality of heat preservation sheets 2 are arranged to rotate in the middle part, the winding parts are arranged in the end cavity 200, and the pull wire 3 passes through the corresponding partitions 102.

[0049] In specific structure, the air vent holes 101 on both sides of the plate body 1 in the thickness direction communicate with the middle cavity 100, so that the gas on both sides of the plate body 1 in the thickness direction can communicate through the air vent holes 101 and the middle cavity 100. In specific implementation, the air vent hole 101 can be in the strip shape as shown in Figure 1 , or other geometric shapes can be set according to the use requirements, as long as the use requirements of the air vent are met.

[0050] When the plurality of heat preservation sheets 2 are in the heat preservation state, as shown inFigure 2 As shown, multiple insulation sheets 2 are overlapped and connected to form an insulation plate, which divides the intermediate cavity 100 into two upper and lower parts, thereby connecting the vent holes 101 on both sides of the plate 1. This helps to reduce the transfer of heat from the inside of the battery pack to the outside, thus helping to ensure the insulation effect of the battery pack.

[0051] Specifically, the insulation sheets 2 located at both ends abut against the partition 102 on the same side, thereby allowing multiple insulation sheets 2 to work together to separate the middle cavity 100 vertically. Of course, even if there is a ventilation gap between the insulation sheets 2 located at both ends and the corresponding partition 102, or even in the case where the partition 102 is not set inside the plate body 1, the flow area can be reduced by the cooperation of multiple insulation sheets 2, thereby facilitating the insulation of the battery pack.

[0052] When multiple insulation sheets 2 are in heat dissipation state, such as Figure 3 As shown, the ventilation holes 101 on the upper and lower sides of the plate 1 can be connected through the heat dissipation channel 300 formed between two adjacent heat insulation sheets 2, which facilitates the dissipation of heat inside the battery pack, thereby achieving the effect of reducing the temperature of the battery pack.

[0053] Furthermore, the adjustment mechanism in this embodiment also includes a drive unit corresponding to each winding section. The power output end of the drive unit is connected to the corresponding winding section to drive the winding section to rotate. By providing a drive unit, it is convenient to drive the winding section to rotate, thereby facilitating the movement of the pull wire 3 to the left or right. By driving the insulation sheet 2 to rotate, the convenience of adjusting the insulation sheet 2 in the heat preservation and heat dissipation states is improved. In specific implementation, the drive unit adopts a motor 5. The power output end of the motor 5 is connected to the winding shaft in the corresponding winding box 4 to output rotational driving force to drive the winding shaft to rotate, thereby realizing the winding or unwinding of the pull wire 3.

[0054] In this embodiment, two adjustment mechanisms are spaced apart along the length of the insulation sheet 2, which helps to improve the stability and reliability of the insulation sheet 2 during rotation. Figure 4 As shown, two pull wires 3 are respectively connected to the rotating side of the top of the insulation sheet 2, and two motors 5 and two winding boxes 4 are provided in each end cavity 200.

[0055] In some embodiments, each end cavity 200 may also contain a motor 5 and two winding boxes 4. The motor 5 may be a dual-axis motor as in the prior art, located between the two winding boxes 4. In addition to directly connecting the power output end of the motor 5 to the winding shaft, a gear unit may be installed between the power output end of the motor 5 and the winding shaft, with the two connected by a gear unit transmission, if space permits. Of course, in specific implementations, only one adjustment mechanism may be provided, in which case the middle of the insulation sheet 2 along its length is connected to the pull wire 3 to ensure the effectiveness of the insulation sheet 2.

[0056] As a preferred embodiment, the heat preservation sheet 2 comprises a sheet body, and a heat preservation layer arranged outside the sheet body, which is conducive to improving the heat preservation performance of the heat preservation sheet 2 in the heat preservation state. Specifically, the heat preservation layer is made of any one of heat preservation cotton, heat preservation glue or heat preservation felt. The heat preservation cotton, heat preservation glue and heat preservation felt all have good heat preservation performance and are easy to arrange on the heat preservation sheet 2.

[0057] The plate body for the battery pack shell in the embodiment is provided with a plurality of heat preservation sheets 2 and pull wires 3, winding parts and driving parts in the mounting cavity of the plate body 1, which is conducive to adjusting the angle of the adjusting plate according to the use requirements of the battery pack, so that the adjusting plate is switched between the heat preservation state and the heat dissipation state, thereby facilitating the use performance of the battery pack according to the heat dissipation and heat preservation requirements of the battery pack.

[0058] Embodiment two

[0059] The embodiment relates to a battery pack, and the shell of the battery pack is provided with the plate body for the battery pack shell described in the embodiment one. The battery pack is provided with a first temperature detection part for detecting the temperature inside the battery pack and a second temperature detection part for detecting the ambient temperature outside the battery pack. When the temperature inside the battery pack and / or the temperature outside the battery pack exceeds the corresponding temperature threshold value, the pull wire 3 is triggered to rotate the heat preservation sheet 2 between the heat preservation state and the heat dissipation state.

[0060] Specifically, the first temperature detection part and the second temperature detection part can both adopt temperature sensors, and both are electrically connected with the BMS in the battery pack, so as to send the temperature inside the battery pack and the temperature outside the battery pack to the BMS. The temperature threshold value comprises a first temperature threshold value inside the battery pack and a second temperature threshold value outside the battery pack. In specific implementation, the first temperature threshold value and the second temperature threshold value can be determined according to the use requirements and stored in the BMS. The BMS can judge the heat preservation and heat dissipation requirements of the battery pack according to the internal and external temperatures of the battery pack, and send signals to the motor 5, so as to drive the pull wire 3 to act, so that the heat preservation sheet 2 is switched between the heat preservation state and the heat dissipation state.

[0061] Taking the case that the battery pack is carried on a vehicle as an example, when the second temperature detection part detects that the ambient temperature outside the battery pack is lower than 25 DEG C and the vehicle is in a stationary state, the BMS judges that the battery pack needs to be heat preserved. The BMS controls the motor 5 to rotate in different directions, so that the pull wire 3 moves to the right, and the adjacent heat preservation sheets 2 are connected to form a closed heat preservation plate, which has good heat preservation effect.

[0062] When the first temperature detection part detects that the battery pack external environment temperature is lower than 25 DEG C, the vehicle is in running or charging state, the BMS will judge the heat preservation and heat dissipation demand of the battery pack according to the battery pack internal temperature, and control the rotation angle of the heat preservation sheet 2 to adjust the heat dissipation or heat preservation area.When the second temperature detection part detects that the battery pack external environment temperature is higher than 40 DEG C, the vehicle is in stationary, running or charging state, the BMS will control the heat dissipation or heat preservation area of the plate body 1 according to the battery pack internal temperature.

[0063] The battery pack of the embodiment is provided with the plate body 1 on the shell of the battery pack, which is beneficial to solve the problem that the battery pack can only heat preservation or only heat dissipation, thereby being beneficial to increase the heat preservation performance of the battery pack in a low temperature environment, and further being beneficial to improve the low temperature endurance mileage and charge-discharge performance of the battery pack.

[0064] In addition, the embodiment also relates to a power utilization device, which is provided with the battery pack as described above.

[0065] The above only describes the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A plate body for a battery pack housing, characterized in that: an installation cavity is arranged in the plate body, and two side walls in the thickness direction of the plate body are respectively provided with air holes communicating with the installation cavity; a plurality of heat preservation plates are arranged in the installation cavity in a spaced manner; and an adjusting mechanism is arranged in the installation cavity for adjusting the rotation angle of the plurality of heat preservation plates. The plurality of heat preservation plates are located between the air holes on the two sides, and the plurality of heat preservation plates have a heat preservation state of being overlapped in sequence and a heat dissipation state of forming a heat dissipation channel between adjacent two heat preservation plates. The adjusting mechanism comprises a pull wire connected to each of the plurality of heat preservation plates, and the pull wire can be triggered to move and drive the plurality of heat preservation plates to rotate synchronously, so that the heat preservation plates are switched between the heat preservation state and the heat dissipation state. 2.A plate body for a battery pack housing according to claim 1, characterized in that: the adjusting mechanism comprises two winding parts arranged in the installation cavity corresponding to the two ends of the pull wire; One of the winding parts can be driven by external force to unwind the pull wire, and the other winding part can be driven by external force to wind the pull wire, so as to adjust the rotation angle of the adjusting plate. 3.A plate body for a battery pack housing according to claim 2, characterized in that: two partitions are arranged at the two ends of the installation cavity, and the two partitions divide the installation cavity into a middle cavity located in the middle part and end part cavities respectively arranged on the opposite sides of the middle cavity; The air holes communicate with the middle cavity, the plurality of heat preservation plates are arranged in the middle part, the winding parts are arranged in the end part cavities respectively, and the pull wire passes through the corresponding partitions. 4.A plate body for a battery pack housing according to claim 2, characterized in that: the adjusting mechanism further comprises a driving part corresponding to each winding part, and the power output end of the driving part is connected to the corresponding winding part to drive the winding part to rotate. 5.A plate body for a battery pack housing according to claim 4, characterized in that: the driving part is an electric motor; and / or the winding part comprises a winding box. 6.A plate body for a battery pack housing according to claim 1, characterized in that: the pull wire is connected to the rotation side of each heat preservation plate; and / or the adjusting mechanism is two driving parts arranged in the length direction of the heat preservation plate. 7.A plate body for a battery pack housing according to any one of claims 1 to 6, characterized in that: the heat preservation plate comprises a plate body and a heat preservation layer arranged outside the plate body. 8.A plate body for a battery pack housing according to claim 7, characterized in that: the heat preservation layer is made of any one of heat preservation cotton, heat preservation glue or heat preservation felt. 9.A battery pack, characterized in that: the battery pack is provided with a plate body for a battery pack housing according to any one of claims 1 to 8 on the housing of the battery pack, and the battery pack is provided with a first temperature detection part for detecting the internal temperature of the battery pack and a second temperature detection part for detecting the external environment temperature of the battery pack. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The pull wire is triggered to rotate the thermal insulation sheet between the thermal insulation state and the heat dissipation state when the battery pack internal temperature and / or the battery pack external temperature exceeds a corresponding temperature threshold.

10. An electric device, characterized in that: The electric device is provided with the battery pack according to claim 9.

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