Protective plate, battery pack and electric equipment

Abstract

The utility model relates to a protection plate, a battery pack and electric equipment, the protection plate is used for being arranged on one side, provided with an anti-explosion valve, of a battery cell, the protection plate comprises a plate body and a pressure relief part, the pressure relief part is opposite to the anti-explosion valve, the pressure relief part comprises a main body part and a separation part, and at least part of the main body part and the plate body are arranged at an interval; the separation part is connected with the main body part and the plate body, and the separation part can be broken, so that at least part of the main body part is separated from the plate body. By adopting the protective plate of the integrated plate body and the pressure relief part, a combined structure of a supporting plate and mica paper is replaced, the number of parts and assembling steps are reduced, the manufacturing process is simplified, the purchasing cost and the production cost of raw materials are reduced, and meanwhile, the risk of sealing failure caused by falling of the mica paper is avoided, so that the cost is reduced, and the production efficiency is improved. And the structural safety and reliability are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a protection plate, a battery pack and an electric equipment. BACKGROUND

[0002] In related technologies, in energy storage batteries, especially large cylindrical PHEV batteries, the number of battery cells is large and the spacing is extremely small (the minimum gap is 1-2 mm), and the bottom of the battery cell has a pressure relief valve. The protection of the bottom of the battery cell is crucial. In order to prevent short circuit and heat spread during thermal runaway, and to ensure the safety of vehicles and personnel, a battery support plate is usually provided, the support plate is provided with a pressure relief hole corresponding to the pressure relief valve, and mica paper is stacked. In a normal working state of the battery, the mica paper remains sealed; when thermal runaway occurs in a certain battery cell, the pressure relief valve is opened, high-temperature and high-pressure gas flows out through the pressure relief hole, breaking the mica paper at this position, thereby achieving pressure relief. However, the cost of this support plate plus mica paper structure is high, and in extreme working conditions, there is a risk of mica paper falling off, affecting the reliability and safety of the structure. CONTENT OF THE UTILITY MODEL

[0003] The embodiments of the present application provide a protection plate, a battery pack and an electric equipment, which reduce the cost and improve the structural safety and reliability, to at least partially solve the above technical problems.

[0004] In order to achieve the above-mentioned purpose, according to the first aspect of the present application, a protection plate is provided, which is arranged on one side of a battery cell provided with a pressure relief valve, the protection plate comprises a plate body and a pressure relief part, the pressure relief part is opposite to the pressure relief valve, and the pressure relief part comprises:

[0005] a main part, which is at least partially arranged in a spaced manner with the plate body; and

[0006] a separation part, which connects the main part and the plate body, and the separation part can be broken to separate at least part of the main part from the plate body.

[0007] Optionally, the main part is arranged in a spaced manner with the plate body, and the separation part is arranged around the main part.

[0008] Optionally, in a direction perpendicular to the protection plate, the thickness of at least part of the separation part is less than the thickness of the main part, and / or the thickness of at least part of the separation part is less than the thickness of the plate body.

[0009] Optionally, the separation part is provided with a groove, and the groove is provided with a plurality of grooves arranged around the main part; or

[0010] the separation part is provided with a groove, and the groove is annular and arranged around the main part.

[0011] Optionally, the protection plate further comprises a support structure protruding from one side of the plate body, one end of the support structure being configured to abut against a box of the battery pack, so that a pressure relief channel is defined between the plate body and the box.

[0012] Optionally, the support structure is integrally formed with the protection plate.

[0013] Optionally, a plurality of pressure relief portions are provided, and one support structure is provided between two adjacent pressure relief portions.

[0014] Optionally, the support structure has two opposite sides, the two sides of the support structure respectively face two adjacent pressure relief portions, and at least one of the two sides of the support structure is recessed towards the other side.

[0015] According to a second aspect of the present application, a battery pack is provided, comprising:

[0016] a box comprising a bottom wall and a side wall connected to an outer periphery of the bottom wall, the bottom wall and the side wall defining a mounting groove;

[0017] a cell arranged in the mounting groove; and

[0018] the protection plate as claimed in any one of the preceding items, the protection plate being arranged between the cell and the bottom wall.

[0019] Optionally, the battery pack further comprises a structural adhesive arranged between the support structure of the protection plate and the bottom wall.

[0020] Optionally, the side wall protrudes a bearing portion, and the plate body is arranged on a side of the bearing portion away from the bottom wall.

[0021] According to a third aspect of the present application, a power consuming device is provided, comprising the battery pack as claimed in any one of the preceding items.

[0022] In the protective plate, the protective plate includes a plate body and a pressure relief part, wherein the pressure relief part is specially designed to work in correspondence with the explosion-proof valve of the battery cell, the pressure relief part includes a main body part and a separation part, at least part of the main body part is arranged in a spaced manner with the plate body, and the separation part is connected between the main body part and the plate body. When the battery is normally working, the protective plate as a whole maintains good sealing performance, so as to ensure that the internal environment of the battery cell is in a stable state. When abnormal conditions such as thermal runaway occur, as the explosion-proof valve starts to release high-pressure gas, the separation part can be broken, and then the main body part is at least partially separated from the plate body, so that an effective pressure relief channel is formed, which can timely release the high-temperature and high-pressure gas, prevent short circuit and heat spread between battery cells, and provide protection for the safety of vehicles and personnel. By using the integrated protective plate to replace the original combination structure of the support plate and the mica paper, the number of parts can be reduced and the assembly steps can be simplified, and the raw material procurement cost and the production cost can be effectively reduced. Moreover, the protective plate as a whole structure avoids the potential risks of loosening or falling off of the mica paper, greatly improving the safety and reliability of the whole system. That is, in the protective plate, the integrated plate body and pressure relief part are used to replace the combination structure of the support plate and the mica paper, the number of parts and the assembly steps are reduced, the manufacturing process is simplified, the raw material procurement cost and the production cost are reduced, and the sealing failure risk caused by the falling off of the mica paper is avoided, thereby reducing the cost, improving the structural safety and reliability.

[0023] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creating laborious work.

[0025] In order to more completely understand the present application and its beneficial effects, the following will be described in conjunction with the drawings, wherein the same reference numerals in the following description represent the same parts.

[0026] Figure 1 is a structural perspective view of the protective plate provided in the exemplary embodiment of the present disclosure;

[0027] Figure 2 is Figure 1 is a partial A enlarged view in

[0028] Figure 3is a structural perspective view of a battery pack provided in an exemplary embodiment of the present disclosure;

[0029] Figure 4 is Figure 3 is a structural explosion view of a battery pack in

[0030] Figure 5 is Figure 3 is a structural top view of a battery pack in

[0031] Figure 6 is Figure 5 is a sectional view at B-B in

[0032] Figure 7 is Figure 6 is a partial C enlarged view in

[0033] Figure 8 is a partial D enlarged view in Figure 6

[0034] BRIEF DESCRIPTION OF DRAWINGS

[0035] 1000, battery pack; 100, protective plate; 1, plate body; 2, pressure relief part; 21, main body part; 22, separation part; 221, groove; 3, support structure; 200, battery cell; 300, bottom wall; 400, side wall; 410, bearing part; 500, structural adhesive; 600, sealing ring; 700, pressure relief channel. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person skilled in the art without creative labor are within the protection scope of the present application.

[0037] The present application provides a protective plate, a battery pack and an electric device, Figure 1 and Figure 2 is a structural schematic view of a protective plate provided in the embodiments of the present application.

[0038] See Figure 1 and Figure 2 The protective plate 100 is used to be arranged at one side of the battery cell 200 provided with an explosion-proof valve, the protective plate 100 includes a plate body 1 and a pressure relief part 2, the pressure relief part 2 is opposite to the explosion-proof valve, the pressure relief part 2 includes a main body part 21 and a separation part 22, the main body part 21 is at least partially arranged in a spaced manner with the plate body 1; the separation part 22 connects the main body part 21 and the plate body 1, the separation part 22 can be broken to separate at least part of the main body part 21 from the plate body 1. ​

[0039] In the protective plate 100 of the embodiment, the protective plate 100 includes two parts of a plate body 1 and a pressure relief part 2, wherein the pressure relief part 2 is specially designed to work in correspondence with the explosion-proof valve of the battery cell 200, the pressure relief part 2 includes a main body part 21 and a separation part 22, at least part of the main body part 21 is arranged in a spaced manner with the plate body 1, and the separation part 22 is connected between the main body part 21 and the plate body 1. When the battery works normally, the protective plate 100 as a whole maintains good sealing performance, thereby ensuring that the internal environment of the battery cell 200 is in a stable state. When abnormal conditions such as thermal runaway occur, as the explosion-proof valve is started to release high-pressure gas, the separation part 22 can be broken, thereby making the main body part 21 at least partially separated from the plate body 1, so that an effective pressure relief flow channel is formed, which can timely release the high-temperature and high-pressure gas, prevent short circuit and heat spread phenomenon between the battery cells 200, and provide protection for the safety of vehicles and personnel. By using the integrated protective plate 100 to replace the original combination structure of the supporting plate and the mica paper, the number of components can be reduced and the assembly steps can be simplified, thereby effectively reducing the raw material procurement cost and the production cost. Moreover, as a whole structure, the protective plate 100 avoids potential risks such as loosening or falling off of the mica paper, greatly improving the safety and reliability of the whole system. That is, in the protective plate 100 of the embodiment, the integrated plate body 1 and the pressure relief part 2 are used to replace the combination structure of the supporting plate and the mica paper, the number of components and the assembly steps are reduced, the manufacturing process is simplified, the raw material procurement cost and the production cost are reduced, and the risk of sealing failure caused by falling off of the mica paper is avoided, thereby reducing the cost, improving the structural safety and reliability.

[0040] In some embodiments, as shown in Figure 2 , the main body part 21 is arranged in a spaced manner with the plate body 1, and the separation part 22 is arranged around the main body part 21. In these embodiments, the separation part 22 is arranged around the main body part 21 like a complete "ring", connecting the main body part 21 and the plate body 1 from various directions. When the battery cell 200 internally occurs thermal runaway, the explosion-proof valve is opened, and needs to be relieved through the protective plate 100, the separation part 22 arranged around the main body part 21 can ensure that the main body part 21 is uniformly separated from the plate body 1 from various directions, and the main body part 21 can be completely separated from the plate body 1, which helps the high-temperature and high-pressure gas to be uniformly discharged from the channel formed by the separation of the main body part 21 and the plate body 1, avoids the accumulation of gas in the battery cell 200 due to poor local pressure relief, thereby more effectively preventing short circuit and heat spread phenomenon, and improving the structural safety and reliability. In addition, it can be understood that since the separation part 22 is arranged around the main body part 21, even if the separation part 22 in a certain area cannot be completely disconnected, the separation part 22 in other areas can still play a role, ensuring the reliability of the structure and improving the performance of the protective plate 100 in extreme conditions.

[0041] The present application does not limit the specific design and manufacture of the separation part 22, such as using a material with a lower melting point to make the separation part 22, which is easy to melt at high temperature, thereby forming a pressure relief flow channel, and also such as using a lower strength material to make the separation part 22, which is easy to break at thermal runaway, thereby forming a pressure relief flow channel.

[0042] In some embodiments, the thickness of at least part of the separation part 22 is less than the thickness of the main body part 21 and / or the thickness of at least part of the separation part 22 is less than the thickness of the plate body 1 in the direction of the vertical protection plate 100. In these embodiments, the thickness of the separation part 22 is less than the thickness of the main body part 21 or the plate body 1, and the thinner separation part 22 means that it is more concentrated in stress when subjected to the same pressure, and is more likely to reach its structural failure limit, thereby being able to quickly trigger the separation action of the main body part 21 and the plate body 1, which helps to open the pressure relief flow channel in time to ensure that the high-temperature and high-pressure gas in the battery cell 200 can be quickly discharged, preventing the battery cell 200 from causing more serious problems due to excessive internal pressure.

[0043] In some embodiments, the separation part 22 is provided with a groove 221, and the groove 221 is provided with a plurality of grooves 221 arranged around the main body part 21. In these embodiments, when the battery cell 200 has abnormal conditions such as thermal runaway, the plurality of grooves 221 arranged around the main body part 21 provide a predetermined weak area for the deformation and fracture of the separation part 22. After the explosion-proof valve is opened, the pressure inside the battery cell 200 acts on the protection plate 100, and stress concentration is more likely to occur at these grooves 221, thereby prompting the separation part 22 to preferentially separate at the grooves 221 according to the design, so that the main body part 21 can be smoothly separated from the plate body 1 to form an effective pressure relief flow channel. This helps to improve the controllability and efficiency of the pressure relief process, ensuring that the high-temperature and high-pressure gas is quickly discharged to prevent short circuits and heat spread between battery cells 200. When the battery is working normally, the arrangement of these grooves 221 around the main body part 21 makes the structure of the separation part 22 more regular, and can better disperse stress when subjected to normal vibration, slight pressure changes, etc., to ensure the reliability of the overall structure of the protection plate 100, prevent accidental separation or structural damage due to excessive local stress, and improve structural reliability.

[0044] In some embodiments, see Figure 2, the separation part 22 is provided with a groove 221, the groove 221 is annular and surrounds the main body part 21. In these embodiments, the annular groove 221 surrounds the main body part 21, when pressure relief is needed, the main body part 21 can be separated from the plate body 1 along the track of the annular groove 221. This annular separation mode can ensure that the main body part 21 is uniformly separated from the plate body 1 from all around, so that the high-temperature and high-pressure gas can be uniformly discharged from the gap between the main body part 21 and the plate body 1, avoiding the local pressure in the battery cell 200 being too high due to uneven pressure relief, further improving the protection effect on the battery cell 200, effectively preventing heat spread and short circuit phenomenon. One annular groove 221 is easier to process and form than multiple discrete grooves 221, which can reduce the process complexity and cost in the manufacturing process. From the structure, the annular groove 221 makes the structure of the separation part 22 more simple, reduces the structural complexity that multiple discrete grooves 221 may bring, improves the stability and reliability of the overall structure of the protection plate 100, while meeting the functional requirements of pressure relief, simplifies the design and manufacturing of the protection plate 100.

[0045] In some embodiments, see Figure 2 and Figure 3 , the protection plate 100 further comprises a support structure 3, the support structure 3 is protruded on one side of the plate body 1, and the end of the support structure 3 away from the plate body 1 is used to abut against the box of the battery pack 1000, so as to define a pressure relief channel 700 (in combination with Figure 7 ) between the plate body 1 and the box. In these embodiments, when the battery cell 200 appears abnormal conditions such as thermal runaway, a large amount of high-temperature and high-pressure gas will be discharged, and the support structure 3 forms a pressure relief channel 700 between the plate body 1 and the box, which provides a special discharge path for the gas, and the gas discharged from the explosion-proof valve of the battery cell 200 can be smoothly discharged out of the battery pack 1000 along this pressure relief channel 700, preventing excessive accumulation of internal pressure of the battery pack 1000, thereby reducing the risk of serious accidents such as explosion and fire, avoiding disorderly diffusion of gas in the battery pack 1000, and reducing the impact on other battery cells 200 or battery components. During normal operation of the battery, the support structure 3 abuts against the box of the battery pack 1000, which helps to fix the position of the protection plate 100, preventing the protection plate 100 from being displaced due to external factors such as vibration and impact, ensuring that the protection plate 100 can continuously and stably protect the battery cell 200. For the structure of the protection plate 100 itself, the existence of the support structure 3 increases the stability of the structure, which supports the plate body 1 from one side, similar to a reinforcing structure, so that the protection plate 100 is not easy to deform or be damaged when facing various possible interference factors. Therefore, the thickness of the plate body 1 can be reduced, and the plate body 1 can be designed to be relatively thin, reducing the cost and weight of the protection plate 100, thereby reducing the overall weight of the battery pack 1000 and improving the energy density.

[0046] In some embodiments, the support structure 3 is integrally formed with the protective plate 100. In these embodiments, the support structure 3 being integrally formed with the protective plate 100 has multiple technical effects. In terms of structural strength, such an integrally formed design can enhance the overall strength, as the connecting gaps or weak links are eliminated, making the stress transmission in the structure more uniform, and effectively reducing the stress concentration phenomenon. From the perspective of production and manufacturing, integrally forming simplifies the production process, only one process is required compared to the separately manufacturing and connecting method, which greatly improves the production efficiency, while reducing the errors or defects that may occur in the production process, thereby improving the overall quality of the product. In terms of the pressure relief channel 700, the support structure 3 being integrally formed with the protective plate 100 can ensure the stability of the shape and size of the pressure relief channel 700, avoiding deformation or blockage due to the relative displacement between the support structure 3 and the protective plate 100 during the use of the battery pack 1000, thereby ensuring that the pressure relief channel 700 can normally function under various working conditions.

[0047] In some embodiments, as shown in Figure 1 , the pressure relief part 2 is provided with multiple support structures 3, and one support structure 3 is provided between adjacent two pressure relief parts 2. In these embodiments, as the support structure 3 is provided between adjacent two pressure relief parts 2 to form isolation, the hot gas flow is limited around the respective corresponding pressure relief part 2. This effectively avoids the hot gas flow generated by the thermal runaway of a certain cell 200 from impacting the pressure relief part 2 corresponding to the adjacent normal cell 200, thereby preventing the pressure relief part 2 of the normal cell 200 from being mistakenly opened. Such an isolation mechanism greatly improves the safety of the battery pack 1000, reducing a series of safety risks that may be caused by misoperation, such as performance degradation caused by premature pressure relief of the cell 200, abnormal internal pressure of the battery pack 1000, etc. In the case of thermal runaway of the cell 200, the isolation effect of the support structure 3 can limit the influence range of the thermal runaway as much as possible to the local area. The hot gas flow is not easy to spread to the adjacent normal cell 200 area, reducing the possibility of thermal runaway spreading, which helps to protect other normal cells 200 from being affected, thereby maintaining the overall safety and stability of the battery pack 1000.

[0048] In some embodiments, as shown in Figure 2The support structure 3 has two opposite sides, and the two sides of the support structure 3 are respectively located towards the two adjacent pressure relief parts 2. At least one of the two sides of the support structure 3 is recessed towards the other side. In these embodiments, at least one of the two sides of the support structure 3 is recessed to form a concave surface. This unique shape can more effectively block the airflow. When the battery cell 200 is in thermal runaway and generates hot airflow, the concave surface can act as a barrier to change the flow direction of the airflow, making it difficult to spread to the opposite uncontrolled battery cell 200 beyond the support structure 3. Compared with a flat surface, the concave surface can increase the blocking area of the airflow, thereby enhancing the blocking ability of the airflow diffusion and better protecting the uncontrolled battery cell 200 from the hot airflow. The presence of the concave surface allows the energy of the hot airflow to be better dispersed when it hits the support structure 3. After the hot airflow hits the concave surface, it will change the flow path along the shape of the concave surface. In this process, the energy of the airflow will be dispersed due to the change of the path and the friction with the concave surface, which helps to reduce the speed and temperature of the airflow and reduce the impact on other components of the battery pack 1000, thereby improving the overall safety and stability of the battery pack 1000. Specifically, both sides of the support structure 3 are recessed, as shown in FIG. 6B, both sides of the support structure 3 are arc-shaped. Figure 2

[0049] According to a second aspect of the present application, as shown in Figure 3 、 Figure 4 and Figure 5 , a battery pack 1000 is provided, which includes a box body, a battery cell 200, and a protective plate 100. The box body includes a bottom wall 300 and a side wall 400 connected to the outer periphery of the bottom wall 300, and the bottom wall 300 and the side wall 400 define a mounting groove; the battery cell 200 is arranged in the mounting groove; and the protective plate 100 is arranged between the battery cell 200 and the bottom wall 300. The structure of the protective plate 100 is as described above. Since the battery pack 1000 adopts all the technical solutions of the above-mentioned embodiments, it at least has the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here. Specifically, the bottom wall 300 is connected to the side wall 400 by bolts, and the battery pack 1000 further includes a sealing ring 600 (in combination with Figure 8 ), which is arranged between the side wall 400 and the bottom wall 300 to achieve better sealing effect.

[0050] In some embodiments, as shown in Figure 4 、 Figure 6 and Figure 7 ​The battery pack 1000 further comprises a structural adhesive 500 arranged between the support structure 3 and the bottom wall 300 of the protection plate 100. In these embodiments, the structural adhesive 500 is arranged between the support structure 3 and the bottom wall 300 of the protection plate 100, and plays a role of adhesion and fixation. It can effectively prevent the support structure 3 from being displaced relative to the bottom wall 300, thereby improving the stability of the entire protection plate 100 in the battery pack 1000. When the battery pack 1000 is subjected to vibration, impact or thermal expansion and contraction during normal use, the structural adhesive 500 can maintain the position of the support structure 3, and ensure that the protection plate 100 continuously plays its due function.

[0051] In some embodiments, see Figure 8 The side wall 400 is provided with a bearing portion 410, and the plate body 1 is arranged on the side of the bearing portion 410 away from the bottom wall 300. In these embodiments, the bearing portion 410 provides stable support and positioning for the plate body 1, preventing it from being displaced under the impact of high-temperature and high-pressure gas, and further ensuring the reliable performance of the protection plate 100 under extreme conditions.

[0052] According to a third aspect of the present application, a power-using device is provided, which comprises a battery pack 1000, the structure of which is as described above. Since the power-using device adopts all the technical solutions of the above-mentioned embodiments, it at least has the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described here. The type of the power-using device is not specifically limited in the present application, and the power-using device includes but is not limited to automobiles, ships, household appliances and industrial equipment.

[0053] In the description of the present application, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0054] In the above embodiments, the description of each embodiment is focused on, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0055] The embodiments, implementation manners and related technical features of the present application can be combined or replaced with each other without conflict.

[0056] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, without departing from the technical solution of the present application, still falls within the scope of the technical solution of the present application.

Claims

1. A protection plate for being disposed on a side of an electric core where an explosion-proof valve is provided, characterized in that, The protection plate comprises a plate body and a pressure relief portion opposite to the explosion-proof valve, the pressure relief portion comprises: a main portion at least partially spaced apart from the plate body; and a separation portion connecting the main portion and the plate body, the separation portion being capable of being broken to separate at least part of the main portion from the plate body.

2. The shield of claim 1, wherein The main portion is spaced apart from the plate body, and the separation portion is arranged around the main portion.

3. The shield of claim 1, wherein In a direction perpendicular to the protection plate, the thickness of at least part of the separation portion is less than the thickness of the main portion, and / or the thickness of at least part of the separation portion is less than the thickness of the plate body.

4. The protection plate according to claim 3, wherein the separation portion is provided with a plurality of grooves arranged around the main portion; or the separation portion is provided with a groove in the form of a ring arranged around the main portion.

5. The shield of any one of claims 1 to 4, wherein, The protection plate further comprises a support structure protruding from one side of the plate body, one end of the support structure away from the plate body being used to abut against a box of the battery pack, so that a pressure relief channel is defined between the plate body and the box.

6. The shield of claim 5, wherein, The support structure is integrally formed with the protection plate.

7. The shield of claim 5 wherein, A plurality of pressure relief portions are provided, and one support structure is provided between two adjacent pressure relief portions.

8. The shield of claim 7, wherein The support structure has two opposite sides, the two sides of the support structure respectively facing two adjacent pressure relief portions, and at least one of the two sides of the support structure is recessed towards the other side.

9. A battery pack, characterized by, Comprising: a box comprising a bottom wall and a side wall connected to the outer periphery of the bottom wall, the bottom wall and the side wall defining a mounting groove; a cell provided in the mounting groove; and The protection plate according to any one of claims 1-8 is provided between the cell and the bottom wall. The battery pack further comprises a structural adhesive provided between the support structure of the protection plate and the bottom wall.

10. The battery pack of claim 9, wherein, The side wall is provided with a bearing portion, and the plate body is arranged on the side of the bearing portion away from the bottom wall.

11. The battery pack of claim 9, wherein, Comprising the battery pack according to any one of claims 9-11.

12. An electrical device, characterized by ​

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