Battery pack guard plate and preparation process thereof

Abstract

This application discloses a battery pack protective plate and its manufacturing method. The battery pack protective plate includes a reinforcing structural layer and a venting structural layer. The reinforcing structural layer is at least partially made of a continuous fiber-reinforced flame-retardant thermoplastic composite material. The venting structural layer is disposed on the upper side of the reinforcing structural layer and includes a cover plate and a support member. The cover plate is made of a continuous fiber-reinforced flame-retardant thermoplastic composite material and is disposed on the upper side of the reinforcing structural layer. A venting cavity is provided between the cover plate and the reinforcing structural layer. The cover plate is used to connect to the battery pack and has vent holes for communicating with the venting cavity. The support member connects the cover plate and the reinforcing structural layer. According to the battery pack protective plate of this application, the flame-retardant composite material is used, which is lightweight and high-strength. In addition to its protective function, it can also assist the battery pack in venting during thermal runaway, further improving safety.

Description

Technical Field

[0001] This application relates to the field of composite materials technology, and more specifically to a battery pack protective plate and its preparation process. Background Technology

[0002] The battery pack is a core component of new energy vehicles. To ensure the safety of the battery pack components, high-strength casing materials are generally used to protect the batteries. Furthermore, to prevent impacts from foreign objects during high-speed vehicle operation, battery packs are often equipped with a battery bottom protection plate.

[0003] However, existing bottom protection plates are mainly made of a single metal material or a single composite material. Among them, metal bottom protection plates are heavy, have poor protection levels, and are expensive. Composite material bottom protection plates, in addition to the problem of protection level, also have the problems of limited functionality and poor compatibility with battery packs.

[0004] Therefore, a battery pack protector and its manufacturing process are needed to at least partially solve the above problems. Summary of the Invention

[0005] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This summary section is not intended to limit the key and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] To at least partially solve the above problems, a first aspect of this application provides a battery pack protector, the battery pack protector comprising:

[0007] A reinforcing structural layer, at least partially made of a continuous fiber-reinforced flame-retardant thermoplastic composite material;

[0008] An exhaust structure layer is disposed above the reinforcing structure layer, and the exhaust structure layer includes:

[0009] The cover plate is made of continuous fiber-reinforced flame-retardant thermoplastic composite material. It is positioned above the reinforcing structural layer, and an exhaust chamber is provided between the cover plate and the reinforcing structural layer. The cover plate is used to connect to the battery pack and has vent holes for communicating with the exhaust chamber.

[0010] The support component is made of long fiber reinforced flame-retardant thermoplastic composite material and is connected between the cover plate and the reinforcing structural layer.

[0011] The battery pack protection plate according to this application is made of flame-retardant composite material, which is lightweight and high-strength. In addition to its protective function, it can also assist the battery pack in venting during thermal runaway, further improving safety.

[0012] Optionally, the reinforcing structural layer includes:

[0013] A first composite layer is connected to the exhaust structure layer;

[0014] A metal reinforcement layer is attached to the lower side of the first composite layer;

[0015] A second composite layer is attached to the underside of the metal reinforcement layer;

[0016] The first composite layer and the second composite layer are made of continuous fiber-reinforced flame-retardant thermoplastic composite material.

[0017] Optionally, the periphery of the reinforcing structural layer is continuously provided with folded portions, which are connected to the cover plate to form the exhaust cavity between the cover plate and the reinforcing structural layer.

[0018] Optionally, the reinforcing structural layer further includes a support plate made of continuous fiber reinforced flame-retardant thermoplastic composite material. The support plate is disposed circumferentially around the periphery of the first composite layer and is connected between the second composite layer and the cover plate. The outer periphery of the first composite layer abuts against the support plate, and the exhaust cavity is formed between the cover plate, the support plate, and the first composite layer. The folded portion is formed by the periphery of the second composite layer and the support plate.

[0019] Optionally, the area of ​​the second composite layer is equal to the area of ​​the support plate plus the area of ​​the metal reinforcement layer, and the area of ​​the second composite layer is equal to the area of ​​the support plate plus the area of ​​the first composite layer.

[0020] Optionally, the reinforcing structural layer further includes a support plate made of continuous fiber-reinforced flame-retardant thermoplastic composite material. The support plate is continuously disposed between the periphery of the second composite layer and the periphery of the first composite layer, wherein the folded portion is formed by the periphery of the first composite layer, the periphery of the second composite layer, and the support plate.

[0021] Optionally, the area of ​​the first composite layer is equal to the area of ​​the support plate plus the area of ​​the metal reinforcement layer, and the area of ​​the second composite layer is equal to the area of ​​the support plate plus the area of ​​the metal reinforcement layer.

[0022] Optionally, the metal reinforcement layer is coated between the first composite layer and the second composite layer by a hot-melt composite process, and the folded portion is formed by the periphery of the first composite layer and the periphery of the second composite layer.

[0023] Optionally, the vent includes an air inlet and an air outlet, wherein the cross-sectional area of ​​the air outlet is larger than that of the air inlet, and the plurality of air inlets are disposed in the middle of the cover plate, and the plurality of air outlets are disposed around the plurality of air inlets or on both sides of the plurality of air inlets.

[0024] Optionally, the upper surface of the cover plate is provided with an adhesive layer.

[0025] Optionally, the cover plate, the first composite layer, the second composite layer, and the support plate are laminated and molded from continuous fiber-reinforced flame-retardant thermoplastic prepreg tape.

[0026] Optionally, the continuous fiber reinforced flame-retardant thermoplastic prepreg tape includes a matrix resin, reinforcing fibers, and additives;

[0027] The matrix resin includes at least one of PP, PA6, PA66, PET and PBT;

[0028] The reinforcing fiber includes at least one of continuous glass fiber, continuous basalt fiber and continuous carbon fiber;

[0029] The additives include flame retardants, and at least one of lubricants, compatibilizers, antioxidants, UV stabilizers, and color masterbatches.

[0030] A second aspect of this application provides a manufacturing process for a battery pack protective plate, comprising:

[0031] S1: Mix the matrix resin with additives to form a prepreg, and then process the prepreg and continuous fibers to form a continuous fiber reinforced flame-retardant thermoplastic prepreg tape.

[0032] S2: The continuous fiber reinforced flame-retardant thermoplastic prepreg tape is laminated and molded to form a continuous fiber reinforced flame-retardant thermoplastic sheet;

[0033] S3: The continuous fiber reinforced flame-retardant thermoplastic sheet is used to form a reinforced structural layer through a hot melt composite process;

[0034] S4: Long fiber reinforced flame-retardant thermoplastic material is used to form a support component through a hot melt composite process;

[0035] S5: The continuous fiber reinforced flame-retardant thermoplastic sheet is formed into a cover plate through a hot melt composite process, and ventilation holes are opened on the cover plate;

[0036] S6: Arrange the support members on the surface of the reinforcing structure layer and heat them together to make the support members and the reinforcing structure layer form a plastic state;

[0037] S7: The support member and the reinforcing structural layer in the plastic state are transferred to a mold and formed into a preform by a high-pressure molding machine;

[0038] S8: The support member, the folded portion of the reinforcing structural layer, and the cover plate on the preform are bonded together by adhesive or ultrasonic bonding to form a battery pack protective plate.

[0039] Optionally, S3 includes: placing a metal reinforcement layer between two layers of continuous fiber-reinforced flame-retardant thermoplastic sheets, and forming the reinforcement structure layer via a hot-melt composite process.

[0040] The battery pack protector fabrication process described in this application is highly efficient and yields a high-quality product. The resulting battery pack protector is lightweight, high-strength, puncture-resistant, and flame-retardant. Attached Figure Description

[0041] The following drawings, which are incorporated herein by reference and are used to understand this application, illustrate embodiments of the invention and their descriptions to explain the principles of the invention.

[0042] In the attached image:

[0043] Figure 1 This is a cross-sectional schematic diagram of a battery pack guard plate according to the first embodiment of this application;

[0044] Figure 2 This is an exploded view of the battery pack guard plate according to the first embodiment of this application;

[0045] Figure 3 This is a cross-sectional schematic diagram of the battery pack guard plate according to the second embodiment of this application;

[0046] Figure 4 This is an exploded view of the battery pack guard plate according to the second embodiment of this application;

[0047] Figure 5 This is a cross-sectional schematic diagram of the battery pack guard plate according to the third embodiment of this application;

[0048] Figure 6 This is an exploded view of the battery pack guard plate according to the third embodiment of this application.

[0049] Explanation of reference numerals in the attached figures:

[0050] 100: Battery pack protection plate

[0051] 110: Reinforcing structural layer

[0052] 111: First composite layer

[0053] 112: Metal reinforcement layer

[0054] 113: Second composite layer

[0055] 114: Support plate

[0056] 120: Exhaust structure layer

[0057] 121: Cover plate

[0058] 122: Fold-over section

[0059] 123: Support component

[0060] 124: Air intake

[0061] 125: Exhaust port

[0062] 126: Exhaust chamber Detailed Implementation

[0063] The following description provides numerous specific details to offer a more thorough understanding of this application. However, it will be apparent to those skilled in the art that this application can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described to avoid confusion with this application.

[0064] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0065] The ordinal numbers such as “first” and “second” used in this application are merely identifiers and have no other meaning, such as a specific order. Furthermore, for example, the term “first component” does not imply the existence of a “second component,” and the term “second component” does not imply the existence of a “first component.” It should be noted that the terms “upper,” “lower,” “front,” “back,” “left,” “right,” “inner,” “outer,” and similar expressions used herein are for illustrative purposes only and are not intended to be limiting.

[0066] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings.

[0067] First Implementation Method

[0068] Figure 1 and Figure 2A battery pack cover 100 according to a first embodiment of this application is shown. The battery pack cover 100 includes a reinforcing structural layer 110 and a venting structural layer 120. The reinforcing structural layer 110 is at least partially made of a continuous fiber-reinforced flame-retardant thermoplastic composite material. The venting structural layer 120 is disposed above the reinforcing structural layer 110 and includes a cover plate 121 and a support member 123. The cover plate 121 is made of a continuous fiber-reinforced flame-retardant thermoplastic composite material, and the support member 123 is made of a long fiber-reinforced flame-retardant thermoplastic composite material. The cover plate 121 is disposed above the reinforcing structural layer 110, and a venting cavity 126 is provided between the cover plate 121 and the reinforcing structural layer 110. The cover plate 121 is used for connection to the battery pack, and the cover plate 121 has a vent hole for communicating with the venting cavity 126. The support member 123 connects the cover plate 121 and the reinforcing structural layer 110. As an alternative implementation, the cover plate 121 and the support member 123 are formed into one piece by adhesive bonding or by ultrasonic composite thermal fusion.

[0069] The battery pack protection plate 100 according to this application is made of flame-retardant composite material, which is lightweight and high-strength. In addition to its protective function, it can also assist the battery pack in venting during thermal runaway, further improving safety.

[0070] The reinforcing structural layer 110 specifically includes a first composite layer 111, a second composite layer 113, and a metal reinforcing layer 112. The metal reinforcing layer 112 is disposed above the second composite layer 113, and the first composite layer 111 is disposed above the metal reinforcing layer 112. The first composite layer 111 is used to connect with the exhaust structural layer 120. The first composite layer 111 and the second composite layer 113 are made of continuous fiber-reinforced flame-retardant thermoplastic composite material. The aforementioned metal reinforcing layer 112 can be a steel plate. The design of two composite layers sandwiching the metal reinforcing layer 112 significantly improves structural strength and puncture resistance with a lighter weight, and the multi-layer structure greatly improves impact resistance, thereby significantly enhancing the product's protective capability for the battery pack. Combined with the flame-retardant capability of the continuous fiber-reinforced flame-retardant thermoplastic composite material, the safety of the battery pack is further improved.

[0071] A folded portion 122 is provided around the periphery of the reinforcing structural layer 110, and the folded portion 122 is continuously provided along the circumference of the reinforcing structural layer 110. Alternatively, the folded portion 122 is constructed in a ring shape. Furthermore, the folded portion 122 folds towards the cover plate 121, so that when the venting structural layer 120 is connected to the reinforcing structural layer 110, the top end of the folded portion 122 abuts against the cover plate 121, thereby forming the aforementioned venting cavity 126 between the cover plate 121 and the reinforcing structural layer 110. As a preferred embodiment, an adhesive layer is provided on the upper surface of the cover plate 121 to facilitate the integration of the battery pack cover 100 with the battery pack when the battery pack cover 100 is installed.

[0072] Continue to refer to Figure 1 The vent includes an air inlet 124 and an exhaust 125. The exhaust 125 has a larger cross-sectional area than the air inlet 124. Multiple air inlets 124 are located in the center of the cover plate 121, and multiple exhaust 125 are arranged around or on both sides of the air inlets 124. As shown in the figure, the circular air inlet 124 is located in the middle, and the elongated exhaust 125 are located on both sides. This arrangement ensures that after the battery pack cover plate 100 is installed on the battery pack or vehicle, the air inlets 124 are located below the battery pack, and the exhaust 125 are located on the outside of the battery pack. This allows gas generated during thermal runaway of the battery pack to be discharged from the air inlets 124 through the exhaust chamber 126 and then from the exhaust 125.

[0073] refer to Figure 1 and Figure 2 In this embodiment, the area of ​​the metal reinforcement layer 112 is smaller than the area of ​​the first composite layer 111 and the second composite layer 113, so that the metal reinforcement layer 112 is completely covered by the first composite layer 111 and the second composite layer 113. Preferably, the areas of the first composite layer 111 and the second composite layer 113 are equal, and the metal reinforcement layer 112 is coated between the first composite layer 111 and the second composite layer 113 by a hot-melt composite process. The folded portion 122 is formed by the periphery of the first composite layer 111 and the periphery of the second composite layer 113.

[0074] Preferably, the cover plate 121, the first composite layer 111, and the second composite layer 113 are laminated and molded from continuous fiber reinforced flame-retardant thermoplastic prepreg tape. The continuous fiber reinforced flame-retardant thermoplastic prepreg tape includes a matrix resin, reinforcing fibers, and additives. The support member 123 is made of long fiber reinforced flame-retardant thermoplastic material, which can be obtained by reinforcing long fibers, matrix resin, and additives, or by crushing continuous fiber reinforced flame-retardant thermoplastic material such as continuous fiber reinforced flame-retardant thermoplastic prepreg tape, for example, by crushing continuous fiber reinforced flame-retardant thermoplastic prepreg tape scraps generated during the production process.

[0075] The matrix resin includes at least one of PP, PA6, PA66, PET, and PBT. The reinforcing fiber includes at least one of continuous glass fiber, continuous basalt fiber, and continuous carbon fiber. The additives include flame retardants, and at least one of lubricants, compatibilizers, antioxidants, UV stabilizers, and color masterbatches.

[0076] The matrix resin and additives are mixed to form a prepreg, which is then mixed with continuous fibers through a prepreg process to form a continuous fiber reinforced flame-retardant thermoplastic prepreg tape. The mass ratio of continuous fibers to prepreg in the continuous fiber reinforced flame-retardant thermoplastic prepreg tape is 40-60:20-30.

[0077] The preferred content of additives in the prepreg is 20-40%. As an optional embodiment, the flame retardant is 15-85 parts by weight, the compatibilizer is 5-35 parts by weight, the antioxidant is 2-10 parts by weight, the lubricant is 2-10 parts by weight, the color masterbatch is 5-20 parts by weight, and the UV stabilizer is 1-10 parts by weight.

[0078] The following describes the manufacturing process of the battery pack guard plate 100, an optional embodiment of this application, which includes the following steps:

[0079] S1: The matrix resin and additives are mixed to form a prepreg, and the prepreg and continuous fibers are processed through a prepreg process to form a continuous fiber reinforced flame retardant thermoplastic prepreg tape.

[0080] S2: Continuous fiber reinforced flame-retardant thermoplastic prepreg tape is laminated and molded to form continuous fiber reinforced flame-retardant thermoplastic sheet;

[0081] S3: The continuous fiber reinforced flame-retardant thermoplastic sheet is used to form a reinforced structural layer 110 through a hot melt composite process.

[0082] S4: The long fiber reinforced flame-retardant thermoplastic sheet is used to form the support component 123 through a hot melt composite process.

[0083] S5: A cover plate 121 is formed by hot-melt composite process of continuous fiber reinforced flame retardant thermoplastic sheet, and ventilation holes are opened on the cover plate 121.

[0084] S6: Arrange the support member 123 on the surface of the reinforcing structure layer 110 and heat it as a whole so that the support member 123 and the reinforcing structure layer 110 form a plastic state.

[0085] S7: The support member 123 and the reinforcing structural layer 110 in a plastic state are transferred to the mold and formed into a preform by a high-pressure molding machine.

[0086] S8: The support member 123, the folded part 122 of the reinforcing structural layer 110 and the cover plate 121 on the prefabricated part are bonded together by adhesive or ultrasonic bonding to form the battery pack protective plate 100.

[0087] Further, S3 includes: placing a metal reinforcement layer 112 between two layers of continuous fiber-reinforced flame-retardant thermoplastic sheets, and forming a reinforced structural layer 110 via a hot-melt composite process. The two layers of continuous fiber-reinforced flame-retardant thermoplastic sheets form the aforementioned first composite layer 111 and second composite layer 113.

[0088] Second Implementation Method

[0089] The second preferred embodiment of this application is a variation of the first preferred embodiment. In this embodiment, reference is made to... Figure 3 and Figure 4In addition to the first composite layer 111, the second composite layer 113, and the metal reinforcement layer 112, the reinforcing structural layer 110 also includes a support plate 114. The support plate 114 is made of continuous fiber reinforced flame-retardant thermoplastic composite material.

[0090] Specifically, the area of ​​the second composite layer 113 is larger than the areas of the metal reinforcement layer 112 and the first composite layer 111. A support plate 114 is disposed circumferentially around the periphery of the first composite layer 111, and the support plate 114 connects the second composite layer 113 and the cover plate 121. The outer periphery of the first composite layer 111 abuts against the support plate 114. Preferably, the outer periphery of the metal reinforcement layer 112 abuts against the support plate 114. In other words, the area of ​​the first composite layer 111 can be equal to the area of ​​the metal reinforcement layer 112, the area of ​​the second composite layer 113 is equal to the area of ​​the support plate 114 plus the area of ​​the metal reinforcement layer 112, and the area of ​​the second composite layer 113 is equal to the area of ​​the support plate 114 plus the area of ​​the first composite layer 111. Thus, the folded portion 122 is formed by the periphery of the second composite layer 113 and the support plate 114, and an exhaust cavity 126 is formed between the cover plate 121, the support plate 114, and the first composite layer 111.

[0091] Third Implementation Method

[0092] The second preferred embodiment of this application is a variation of the first preferred embodiment. In this embodiment, reference is made to... Figure 5 and Figure 6 In addition to the first composite layer 111, the second composite layer 113, and the metal reinforcement layer 112, the reinforcing structural layer 110 also includes a support plate 114. The support plate 114 is made of continuous fiber reinforced flame-retardant thermoplastic composite material.

[0093] Specifically, the area of ​​the metal reinforcement layer 112 is smaller than the area of ​​the first composite layer 111 and the second composite layer 113, and the support plate 114 is continuously disposed between the periphery of the second composite layer 113 and the periphery of the first composite layer 111. Preferably, the outer periphery of the metal reinforcement layer 112 abuts against the support plate 114. In other words, in this embodiment, the area of ​​the first composite layer 111 can be equal to the area of ​​the second composite layer 113. That is, the area of ​​the first composite layer 111 is equal to the area of ​​the support plate 114 plus the area of ​​the metal reinforcement layer 112, and the area of ​​the second composite layer 113 is equal to the area of ​​the support plate 114 plus the area of ​​the metal reinforcement layer 112.

[0094] In this embodiment, the folding portion 122 is formed by the periphery of the first composite layer 111, the periphery of the second composite layer 113, and the support plate 114, thereby reinforcing the folding portion 122 of the structural layer 110 to abut against the cover plate 121 to form an exhaust cavity 126 between the cover plate 121 and the first composite layer 111.

[0095] The processes and steps in all the preferred embodiments described above are merely examples. Unless adverse effects occur, various processing operations can be performed in a different order than that described above. The order of steps in the above process can also be added, combined, or deleted according to actual needs.

[0096] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of this application. Features described in one embodiment may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0097] This application has been described through the above embodiments. However, it should be understood that the above embodiments are only for illustrative purposes. This application is not limited to the above embodiments. Many variations and modifications can be made based on the teachings of this application, and all such variations and modifications fall within the scope of protection claimed in this application.

Claims

1. A battery pack protective plate, characterized in that, The battery pack protection plate includes: A reinforcing structural layer, at least partially made of a continuous fiber-reinforced flame-retardant thermoplastic composite material, comprising: First composite layer, A metal reinforcement layer is attached to the underside of the first composite layer. A second composite layer is attached to the underside of the metal reinforcement layer. The first composite layer and the second composite layer are made of continuous fiber reinforced flame-retardant thermoplastic composite material; An exhaust structure layer, wherein the exhaust structure layer is disposed on the upper side of the reinforcing structure layer and connected to the first composite layer, the exhaust structure layer comprising: A cover plate, made of continuous fiber-reinforced flame-retardant thermoplastic composite material, is disposed on the upper side of the reinforcing structural layer. An exhaust chamber is provided between the cover plate and the reinforcing structural layer. The cover plate is used to connect to the battery pack, and vent holes are provided on the cover plate to communicate with the exhaust chamber. The support component is made of long fiber reinforced flame-retardant thermoplastic composite material. The support component is connected between the cover plate and the reinforcing structural layer. The cover plate and the support component are integrally formed by adhesive bonding or ultrasonic composite thermal fusion.

2. The battery pack protective plate according to claim 1, characterized in that, The periphery of the reinforcing structural layer is continuously provided with folded portions, which are connected to the cover plate to form the exhaust cavity between the cover plate and the reinforcing structural layer.

3. The battery pack protective plate according to claim 2, characterized in that, The reinforcing structural layer further includes a support plate made of continuous fiber reinforced flame-retardant thermoplastic composite material. The support plate is disposed circumferentially around the periphery of the first composite layer and is connected between the second composite layer and the cover plate. The outer periphery of the first composite layer abuts against the support plate, and the exhaust cavity is formed between the cover plate, the support plate, and the first composite layer. The folded portion is formed by the periphery of the second composite layer and the support plate.

4. The battery pack protective plate according to claim 3, characterized in that, The area of ​​the second composite layer is equal to the area of ​​the support plate plus the area of ​​the metal reinforcement layer, and the area of ​​the second composite layer is equal to the area of ​​the support plate plus the area of ​​the first composite layer.

5. The battery pack protective plate according to claim 2, characterized in that, The reinforcing structural layer also includes a support plate made of continuous fiber-reinforced flame-retardant thermoplastic composite material. The support plate is continuously disposed between the periphery of the second composite layer and the periphery of the first composite layer, wherein the folded portion is formed by the periphery of the first composite layer, the periphery of the second composite layer and the support plate.

6. The battery pack protective plate according to claim 5, characterized in that, The area of ​​the first composite layer is equal to the area of ​​the support plate plus the area of ​​the metal reinforcement layer, and the area of ​​the second composite layer is equal to the area of ​​the support plate plus the area of ​​the metal reinforcement layer.

7. The battery pack protective plate according to claim 2, characterized in that, The metal reinforcement layer is coated between the first composite layer and the second composite layer by a hot melt composite process, and the folded portion is formed by the periphery of the first composite layer and the periphery of the second composite layer.

8. The battery pack protective plate according to any one of claims 1-7, characterized in that, The vent includes an air inlet and an air outlet, wherein the cross-sectional area of ​​the air outlet is larger than that of the air inlet. A plurality of air inlets are disposed in the middle of the cover plate, and a plurality of air outlets are disposed around the plurality of air inlets or on both sides of the plurality of air inlets.

9. The battery pack protective plate according to any one of claims 1-7, characterized in that, An adhesive layer is provided on the upper surface of the cover plate.

10. The battery pack protective plate according to any one of claims 3-6, characterized in that, The cover plate, the first composite layer, the second composite layer, and the support plate are made of continuous fiber-reinforced flame-retardant thermoplastic prepreg laminated and molded.

11. The battery pack protective plate according to claim 10, characterized in that, The continuous fiber reinforced flame-retardant thermoplastic prepreg tape includes a matrix resin, reinforcing fibers, and additives; The matrix resin includes at least one of PP, PA6, PA66, PET and PBT; The reinforcing fiber includes at least one of continuous glass fiber, continuous basalt fiber and continuous carbon fiber; The additives include flame retardants, and at least one of lubricants, compatibilizers, antioxidants, UV stabilizers, and color masterbatches.

12. A manufacturing process for a battery pack protective plate, characterized in that, include: S1: Mix the matrix resin with additives to form a prepreg, and then process the prepreg and continuous fibers to form a continuous fiber reinforced flame-retardant thermoplastic prepreg tape. S2: The continuous fiber reinforced flame-retardant thermoplastic prepreg tape is laminated and molded to form a continuous fiber reinforced flame-retardant thermoplastic sheet; S3: A metal reinforcement layer is placed between two layers of continuous fiber-reinforced flame-retardant thermoplastic sheets, and a reinforced structural layer is formed through a hot-melt composite process; S4: Long fiber reinforced flame-retardant thermoplastic material is used to form a support component through a hot melt composite process; S5: The continuous fiber reinforced flame-retardant thermoplastic sheet is formed into a cover plate through a hot melt composite process, and ventilation holes are opened on the cover plate; S6: Arrange the support members on the surface of the reinforcing structure layer and heat them together to make the support members and the reinforcing structure layer form a plastic state; S7: The support member and the reinforcing structural layer in the plastic state are transferred to a mold and formed into a preform by a high-pressure molding machine; S8: The support member, the folded portion of the reinforcing structural layer, and the cover plate on the preform are bonded together by adhesive or ultrasonic bonding to form a battery pack protective plate.

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