A battery pack anti-condensation structure and manufacturing method thereof

Abstract

The present application relates to the technical field of battery packs, and in particular to a battery pack anti-condensation structure and a manufacturing method thereof. It comprises: a shell, the shell comprises a first plane, a second plane and a first cavity; a ejector pin, which is arranged in the first cavity, the ejector pin is connected to the second plane, and a hygroscopic part is arranged on the first plane, and the hygroscopic part is used to absorb water vapor. The breathable membrane can prevent water vapor outside the battery pack from entering the battery pack by coating the surface with PU waterproof coating fabric. At the same time, the surface of the inner fire filter net is adhered with hygroscopic material, which can absorb water vapor inside the battery pack. When thermal runaway is triggered, the adhesive layer on the surface of the hygroscopic foam fails due to the high temperature, and the hygroscopic material is separated from the inner fire filter net, which does not affect the air permeability and fire filtering performance after the explosion, improves the corrosion resistance and insulation resistance of the battery pack, and improves the safety performance of the battery pack.

Description

Technical Field

[0001] The present application relates to the technical field of battery packs, and in particular to a battery pack anti-condensation structure and a manufacturing method thereof. Background Art

[0002] With the rise of new energy vehicles, there are many types of battery pack designs. Factors such as energy density and electric vehicle platform determine different battery pack designs. With the acceleration of industrialization of the power battery industry, the safety design of battery packs has become a hot topic of research. For example, how to improve the electrical safety and thermal runaway safety of battery packs, how to reduce condensation problems in battery packs, etc.

[0003] However, the existing battery pack explosion-proof valves mostly adopt the ejector-type blasting method, and the air permeability of the explosion-proof valve breathable membrane is relatively large. The battery pack cannot prevent wet water vapor from entering the battery pack in a high temperature and high humidity environment, and cannot prevent condensation from forming in the battery pack, thereby affecting the insulation and short circuit risk of the battery pack and affecting the safety performance of the battery pack. Summary of the invention

[0004] The purpose of this application is: to solve the above-mentioned technical problems, this application provides a battery pack anti-condensation structure, aiming to solve the condensation problem inside the battery pack.

[0005] In some embodiments of the present application, the breathable membrane is made of E-PTFE material. After thermal runaway is triggered, the surface of the membrane is deformed and punctured by a pin. A PU waterproof coating fabric is coated on the surface to mask the microporous structure on the surface of the breathable membrane. The thickness of the coating material is between 0.05-0.1 mm and the mechanical properties of the coating material are the same as those of the breathable membrane.

[0006] In some embodiments of the present application, two rectangular non-coated areas with a width of 3-7 mm can be reserved on the breathable membrane. The two rectangles are cross-intersected, and the intersection must be on the same straight line as the circle of the ejector pin. At the same time, they can also be crossed in three straight lines, four straight lines, etc., and the center point passes through the ejector pin to ensure that the middle of the breathable membrane can be punctured and tear along the non-coated area at the same time, thereby improving the explosion response time and the safety and insulation properties of the battery pack.

[0007] In some embodiments of the present application, the breathable membrane is coated with PU waterproof coating fabric on the surface to prevent water vapor from outside the battery pack from entering the battery pack. At the same time, the surface of the inner fire filter net is adhered with hygroscopic material to absorb water vapor inside the battery pack. When thermal runaway is triggered, the rubber layer on the surface of the hygroscopic foam fails due to the high temperature, and the hygroscopic material is separated from the inner fire filter net, which does not affect the air permeability and fire filtering performance after explosion, improves the corrosion resistance and insulation resistance of the battery pack, and improves the safety performance of the battery pack.

[0008] In some embodiments of the present application, an external mounting point structure is used, the mounting hole is designed with a through hole structure, and is externally installed. The shell is designed with a rivet nut to facilitate assembly and disassembly, save internal space of the battery pack, and facilitate after-sales maintenance. It can be directly replaced without disassembling the shell.

[0009] In some embodiments of the present application, a double-layer fire filtering structure is adopted, and the mesh holes are staggered in design, which improves the safety performance of the battery pack. A convex mesh structure is adopted on the inner side and a flat mesh structure is adopted on the outer layer, which saves internal space. At the same time, the convex mesh structure increases the fire filtering distance between the convex mesh and the flat mesh, thereby improving the safety performance of the device and the fire filtering performance of the battery pack.

[0010] In some embodiments of the present application, a battery pack anti-condensation structure is provided, including:

[0011] A shell, the shell comprising a first plane, a second plane and a first cavity;

[0012] An ejector pin is disposed in the first cavity, and the ejector pin is connected to the second plane;

[0013] A moisture absorbing portion is disposed on the first plane, and the moisture absorbing portion is used for absorbing water vapor.

[0014] In some embodiments of the present application, the moisture absorbing part includes:

[0015] A breathable membrane, the inner surface of which is coated with a hygroscopic material, the hygroscopic material being used to absorb moisture inside the shell;

[0016] The breathable membrane includes a coated area and a non-coated area;

[0017] The center point of the non-coated area is arranged on the projection of the ejector pin on the breathable film, and when the ejector pin pierces the breathable film, the breathable film is torn according to the non-coated area.

[0018] In some embodiments of the present application, the moisture absorbing part further includes:

[0019] A fire filtering structure, the fire filtering structure comprising a first fire filtering net and a second fire filtering net, the first fire filtering net is a convex net structure, and the second fire filtering net is a flat net structure;

[0020] The first fire filter and the second fire filter are connected to the housing by rivets

[0021] The first fire filter net and the second fire filter net are provided with a through hole structure.

[0022] The first fire filter is coated with a hygroscopic material for absorbing moisture inside the battery pack.

[0023] In some embodiments of the present application, the through hole structure of the first filter screen and the second filter screen is staggered.

[0024] In some embodiments of the present application, further comprising:

[0025] A connecting portion, disposed on the housing and used for connecting to a battery pack;

[0026] The connecting portion comprises:

[0027] A first connecting hole, a second connecting hole, a third connecting hole and a fourth connecting hole.

[0028] In some embodiments of the present application, a method for manufacturing a battery pack anti-condensation structure is provided, comprising:

[0029] Obtaining the ventilation requirement of the battery pack, and setting the non-coating area of ​​the breathable membrane according to the ventilation requirement of the battery pack;

[0030] The manufacturing parameters of the non-coating region of the breathable membrane are set according to the area of ​​the non-coating region of the breathable membrane.

[0031] In some embodiments of the present application, when the area of ​​the non-coated region of the breathable membrane is set according to the ventilation requirement of the battery pack, it includes:

[0032] Preset the battery pack ventilation demand matrix and the ventilation membrane non-coating area matrix;

[0033] Obtaining the ventilation requirement of the battery pack, and setting the non-coating area of ​​the breathable membrane according to the ventilation requirement of the battery pack;

[0034] The ventilation requirement of the battery pack increases in the same direction as the area of ​​the non-coated region of the breathable membrane.

[0035] In some embodiments of the present application, when the manufacturing parameters of the non-coated area of ​​the breathable membrane are set according to the area of ​​the non-coated area of ​​the breathable membrane, the method includes:

[0036] A plurality of non-coating sub-regions are set, the plurality of non-coating sub-regions are crossed, and the crossing region is arranged on the projection of the ejector pin on the breathable membrane. When the ejector pin pierces the breathable membrane, the breathable membrane is torn according to the non-coating region.

[0037] In some embodiments of the present application, the setting of multiple non-coating sub-areas includes:

[0038] The non-coating sub-area is two rectangles with a width of 3-7 mm, and the two rectangles are cross-shaped;

[0039] The length of each rectangle is less than the width of the breathable membrane;

[0040] The sum of the areas of the two rectangles is less than 1 / 4 of the area of ​​the breathable membrane.

[0041] In some embodiments of the present application, when the plurality of non-coating sub-areas are set, the method further includes:

[0042] Preset ejector pin bursting pressure threshold M1;

[0043] Obtain the ejector pin bursting pressure design value M2 of the battery pack anti-condensation structure;

[0044] If M1>M2, the non-coated sub-area is set to be a rectangle;

[0045] If M1<M2, the non-coating sub-region is set to a polygonal structure.

[0046] Compared with the prior art, the battery pack anti-condensation structure and the manufacturing method thereof in the embodiment of the present application have the following beneficial effects:

[0047] Two rectangular non-coated areas with a width of 3-7mm are reserved on the breathable membrane. The two rectangles are cross-intersected. The intersection point must be on the same straight line as the circle of the ejector pin. It can also be crossed in three straight lines, four straight lines, etc. The center point passes through the ejector pin to ensure that the middle of the breathable membrane can be punctured. At the same time, it is torn along the non-coated area, which improves the explosion response time and improves the safety and insulation performance of the battery pack.

[0048] The breathable membrane is coated with PU waterproof coating fabric to prevent water vapor from outside the battery pack from entering the battery pack. At the same time, the surface of the inner fire filter net is adhered with hygroscopic material to absorb water vapor inside the battery pack. When thermal runaway is triggered, the rubber layer on the surface of the hygroscopic foam fails due to the high temperature, and the hygroscopic material is separated from the inner fire filter net, which does not affect the air permeability and fire filtering performance after explosion, improves the corrosion resistance and insulation resistance of the battery pack, and improves the safety performance of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 is a schematic diagram of a battery pack anti-condensation structure in a preferred embodiment of the present application;

[0050] Figure 2 is a cross-sectional schematic diagram of a battery pack anti-condensation structure in a preferred embodiment of the present application;

[0051] Figure 3 is another cross-sectional schematic diagram of a battery pack anti-condensation structure in a preferred embodiment of the present application;

[0052] Figure 4 is a schematic diagram of a non-coated sub-region of a breathable membrane in a preferred embodiment of the present application;

[0053] Figure 5It is a flow chart of a method for manufacturing an anti-condensation structure of a battery pack in a preferred embodiment of the present application.

[0054] In the figure, the shell body 100; the first cavity 110; the ejector pin 200; the breathable membrane 300; the coated area 310; the non-coated area 320; the first fire filter 410; the second fire filter 420; the rivet 430; the first connecting hole 510, the second connecting hole 520, the third connecting hole 530; and the fourth connecting hole 540. DETAILED DESCRIPTION

[0055] The specific implementation methods of the present application are further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application but are not intended to limit the scope of the present application.

[0056] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0057] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0058] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0059] like Figure 1 - Figure 4 As shown, a battery pack anti-condensation structure according to a preferred embodiment of the present application is characterized by comprising:

[0060] The housing 100 includes a first plane, a second plane and a first cavity 110;

[0061] The ejector pin 200 is disposed in the first cavity 110, and the ejector pin 200 is connected to the second plane;

[0062] A moisture absorbing portion is arranged on the first plane, and the moisture absorbing portion is used for absorbing water vapor.

[0063] Specifically, the moisture absorption part includes:

[0064] The breathable membrane 300 has a hygroscopic material coated on its inner surface, and the hygroscopic material is used to absorb moisture inside the housing 100;

[0065] The breathable membrane 300 includes a coated area 310 and a non-coated area 320;

[0066] The center point of the non-coated area 320 is set on the projection of the ejector pin 200 on the breathable membrane 300 . When the ejector pin 200 pierces the breathable membrane 300 , the breathable membrane 300 is torn along the non-coated area 320 .

[0067] Specifically, the breathable membrane 300 is made of E-PTFE material. After thermal runaway is triggered, the membrane is punctured by the ejector pin 200 due to surface deformation. A PU waterproof coating material is coated on the surface to mask the microporous structure on the surface of the breathable membrane 300. The thickness of the coating material is between 0.05 and 0.1 mm, and the mechanical properties of the coating material are the same as those of the breathable membrane 300.

[0068] Specifically, the PU waterproof coating fabric is applied to the inner surface of the breathable membrane 300, and the welding surface with the main body is not coated to avoid affecting the welding strength between the breathable membrane 300 and the main body.

[0069] Specifically, the non-coated area 320 can be two rectangles intersecting in a cross, and the intersection point must be on the same straight line as the circle of the ejector pin 200. It can also be three straight lines, four straight lines, etc. The center point passes through the ejector pin 200 to ensure that the middle of the breathable membrane 300 can be punctured and tear along the non-coated area 320, thereby improving the explosion response time and the safety and insulation performance of the battery pack.

[0070] In a preferred embodiment of the present application, the moisture absorbing part further includes:

[0071] The fire filtering structure includes a first fire filtering net 410 and a second fire filtering net 420. The first fire filtering net 410 is a convex net structure, and the second fire filtering net 420 is a flat net structure;

[0072] The first fire filter 410 and the second fire filter 420 are connected to the housing 100 through rivets 430

[0073] The first fire filter net and the second fire filter net are provided with a through hole structure.

[0074] The first fire filter is coated with a hygroscopic material to absorb moisture inside the battery pack.

[0075] Specifically, the through hole structures of the first filter screen and the second filter screen are staggered.

[0076] Specifically, the mesh adopts a staggered design to improve the safety performance of the battery pack. The first fire filter adopts a convex mesh structure, and the second fire filter adopts a flat mesh structure, which saves the internal space of the explosion-proof valve. At the same time, the convex mesh structure increases the fire filtering distance between the convex mesh and the flat mesh.

[0077] Specifically, a hygroscopic material is pasted on the surface of the first fire filter 410, which can absorb water vapor inside the battery pack. When thermal runaway is triggered, the glue layer on the surface of the hygroscopic foam fails due to the high temperature, and the hygroscopic material is separated from the inner fire filter, which will not affect the air permeability and fire filtering performance after the explosion.

[0078] In a preferred embodiment of the present application, it also includes:

[0079] A connecting portion, disposed on the housing 100 and used for connecting the battery pack;

[0080] The connection part includes:

[0081] The first connection hole 510 , the second connection hole 520 , the third connection hole 530 and the fourth connection hole 540 .

[0082] Specifically, the first connecting hole 510, the second connecting hole 520, the third connecting hole 530 and the fourth connecting hole 540 are all rivet nuts, through which the anti-condensation structure of the battery pack can be connected to the battery pack, which is convenient for assembly and disassembly, saves internal space of the battery pack, and is convenient for after-sales maintenance, and can be directly replaced without disassembling the shell 100.

[0083] like Figure 5 As shown, in another embodiment based on the above preferred embodiment, this preferred embodiment provides a method for manufacturing a battery pack anti-condensation structure, comprising:

[0084] S101: Obtaining the ventilation requirement of the battery pack, and setting the non-coating area of ​​the breathable membrane according to the ventilation requirement of the battery pack;

[0085] S102: Setting the manufacturing parameters of the non-coating region of the breathable membrane according to the area of ​​the non-coating region of the breathable membrane.

[0086] Specifically, when setting the non-coated area of ​​the breathable membrane according to the ventilation requirements of the battery pack, it includes:

[0087] A preset battery pack ventilation requirement matrix A is set as A(A1, A2, A3, A4), wherein A1 is the preset ventilation requirement of the first battery pack, A2 is the preset ventilation requirement of the second battery pack, A3 is the preset ventilation requirement of the third battery pack, A4 is the preset ventilation requirement of the fourth battery pack, and A1<A2<A3<A4;

[0088] Preset the non-coating area matrix B of the breathable membrane, set B(B1, B2, B3, B4), where B1 is the preset first breathable membrane non-coating area, B2 is the preset second breathable membrane non-coating area, B3 is the preset third breathable membrane non-coating area, B4 is the preset fourth breathable membrane non-coating area, and B1<B2<B3<B4;

[0089] Obtain the battery pack ventilation requirement a, and set the non-coated area b of the breathable membrane according to the battery pack ventilation requirement a;

[0090] When A1<a<A2, the area b of the non-coated region of the breathable membrane is set to be smaller than the area B1 of the non-coated region of the first breathable membrane, that is, b<B1;

[0091] When A2<a<A3, the area b of the non-coated region of the breathable membrane is set to be between the first non-coated region of the breathable membrane area B1 and the second non-coated region of the breathable membrane area B2, that is, B1<b<B2;

[0092] When A3<a<A4, the area b of the non-coated region of the breathable membrane is set to be between the area B2 of the second non-coated region of the breathable membrane and the area B3 of the third non-coated region of the breathable membrane, that is, B2<b<B3;

[0093] When a>A4, the air permeable membrane non-coating area b is set between the third air permeable membrane non-coating area B3 and the fourth air permeable membrane non-coating area B4, that is, B3<b<B4.

[0094] Specifically, the ventilation demand of the battery pack increases in the same direction as the non-coated area of ​​the breathable membrane.

[0095] Specifically, the greater the air permeability requirement before bursting of the air permeable valve, the larger the area of ​​the non-coated region of the air permeable membrane thereof.

[0096] In a preferred embodiment of the present application, when the manufacturing parameters of the non-coated area of ​​the breathable membrane are set according to the area of ​​the non-coated area of ​​the breathable membrane, the following steps are included:

[0097] A plurality of non-coating sub-regions are set, and the plurality of non-coating sub-regions are crossed, and the crossing region is set on the projection of the ejector pin 200 on the breathable membrane. When the ejector pin 200 pierces the breathable membrane, the breathable membrane is torn according to the non-coating region.

[0098] Specifically, the center point of the non-coated area passes through the ejector pin 200, ensuring that the ejector pin 200 can pierce the middle of the breathable membrane. At the same time, the breathable membrane is torn along the non-coated area, thereby improving the explosion response time and improving the safety and insulation performance of the battery pack.

[0099] Specifically, when multiple non-coating sub-areas are set, they include:

[0100] The non-coating sub-area is two rectangles with a width of 3-7 mm, and the two rectangles are cross-shaped;

[0101] The length of each rectangle is less than the width of the breathable membrane;

[0102] The sum of the areas of the two rectangles is less than 1 / 4 of the area of ​​the breathable membrane.

[0103] When the sum of the areas of the two rectangles is less than 1 / 4 of the area of ​​the breathable membrane, the bursting pressure of the explosion-proof valve before and after coating can be guaranteed to remain unchanged. If the sum of the areas of the two rectangles is greater than 1 / 4 of the area of ​​the breathable membrane, the bursting pressure of the explosion-proof valve after coating is 1.5 to 2 times the bursting pressure of the explosion-proof valve in the uncoated area.

[0104] In a preferred embodiment of the present application, when multiple non-coating sub-areas are set, it also includes:

[0105] Preset ejector pin bursting pressure threshold M1;

[0106] Obtain the ejector pin bursting pressure design value M2 of the battery pack anti-condensation structure;

[0107] If M1>M2, the non-coated sub-area is set to be a rectangle;

[0108] If M1<M2, the non-coating sub-region is set to a polygonal structure.

[0109] Specifically, if the bursting pressure design value of the ejector-type explosion-proof valve is above 20 KPa, the non-coated area of ​​the breathable membrane may be a polygonal structure such as a circle or an ellipse.

[0110] According to the first concept of the present application, the breathable membrane is made of E-PTFE material. After thermal runaway is triggered, the membrane is punctured by a pin due to surface deformation. PU waterproof coating fabric is coated on its surface to mask the microporous structure on the surface of the breathable membrane. The thickness of the coating material is between 0.05-0.1mm and the mechanical properties of the coating material are the same as those of the breathable membrane.

[0111] According to the second concept of the present application, two rectangular non-coated areas with a width of 3-7 mm can be reserved on the breathable membrane. The two rectangles are cross-intersected, and the intersection point must be on the same straight line as the circle of the ejector pin. At the same time, they can also be crossed in three straight lines, four straight lines, etc., with the center point passing through the ejector pin, to ensure that the middle of the breathable membrane can be punctured, and at the same time, tearing is performed along the non-coated area, thereby improving the explosion response time and improving the safety and insulation properties of the battery pack.

[0112] According to the third concept of the present application, the breathable membrane can prevent water vapor from outside the battery pack from entering the battery pack by coating the surface with PU waterproof coating fabric. At the same time, the surface of the inner fire filter net is adhered with hygroscopic material, which can absorb water vapor inside the battery pack. When thermal runaway is triggered, the glue layer on the surface of the hygroscopic foam fails due to the high temperature, and the hygroscopic material is separated from the inner fire filter net, which does not affect the air permeability and fire filtering performance after explosion, improves the corrosion resistance and insulation resistance of the battery pack, and improves the safety performance of the battery pack.

[0113] According to the fourth concept of the present application, an external mounting point structure is used, the mounting hole adopts a through-hole structure design, and is externally installed. The shell is designed with a rivet nut to facilitate assembly and disassembly, save internal space of the battery pack, and facilitate after-sales maintenance. It can be directly replaced without disassembling the shell.

[0114] According to the fifth concept of the present application, a double-layer fire filtering structure is adopted, and the mesh holes are staggered in design, which improves the safety performance of the battery pack. A convex mesh structure is adopted on the inner side and a flat mesh structure is adopted on the outer layer, which saves internal space. At the same time, the convex mesh structure increases the fire filtering distance between the convex mesh and the flat mesh, thereby improving the safety performance of the device and the fire filtering performance of the battery pack.

[0115] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present application. These improvements and substitutions should also be regarded as the scope of protection of the present application.

Claims

1. A battery pack anti-condensation structure, characterized in that: include: A shell, the shell comprising a first plane, a second plane and a first cavity; An ejector pin is disposed in the first cavity, and the ejector pin is connected to the second plane; A moisture absorbing portion is provided on the first plane, and the moisture absorbing portion is used to absorb water vapor; The moisture absorption part comprises: A breathable membrane, the inner surface of which is coated with a hygroscopic material, the hygroscopic material being used to absorb moisture inside the shell; The breathable membrane includes a coated area and a non-coated area; The center point of the non-coated area is arranged on the projection of the ejector pin on the breathable film, and when the ejector pin pierces the breathable film, the breathable film is torn along the non-coated area.

2. The battery pack anti-condensation structure according to claim 1, characterized in that: The moisture absorption part also includes: A fire filtering structure, the fire filtering structure comprising a first fire filtering net and a second fire filtering net, the first fire filtering net is a convex net structure, and the second fire filtering net is a flat net structure; The first fire filter net and the second fire filter net are connected to the housing through rivets; the first fire filter net and the second fire filter net are provided with a through hole structure; The first fire filter is coated with a hygroscopic material for absorbing moisture inside the battery pack.

3. The battery pack anti-condensation structure according to claim 2, characterized in that: The through hole structures of the first fire filter net and the second fire filter net are staggered.

4. The battery pack anti-condensation structure according to claim 1, characterized in that: Also includes: A connecting portion, disposed on the housing and used for connecting to a battery pack; The connecting portion comprises: A first connecting hole, a second connecting hole, a third connecting hole and a fourth connecting hole.

5. A method for manufacturing a battery pack anti-condensation structure, characterized in that: include: Obtaining a ventilation requirement of the battery pack, and setting an area of ​​a non-coated region of the breathable membrane according to the ventilation requirement of the battery pack, wherein the ventilation requirement of the battery pack increases in the same direction as the area of ​​the non-coated region of the breathable membrane; Setting the manufacturing parameters of the non-coating area of ​​the breathable membrane according to the area of ​​the non-coating area of ​​the breathable membrane; When setting the manufacturing parameters of the non-coating area of ​​the breathable membrane according to the area of ​​the non-coating area of ​​the breathable membrane, it includes: A plurality of non-coating sub-regions are set, and the plurality of non-coating sub-regions are crossed, and the crossing region is set on the projection of the ejector pin on the breathable membrane. When the ejector pin pierces the breathable membrane, the breathable membrane is torn according to the non-coating region.

6. The method for manufacturing the anti-condensation structure of a battery pack according to claim 5, characterized in that: When the area of ​​the non-coated region of the breathable membrane is set according to the ventilation requirement of the battery pack, it includes: Preset the battery pack ventilation demand matrix and the ventilation membrane non-coating area matrix; The ventilation requirement of the battery pack is obtained, and the non-coating area of ​​the breathable membrane is set according to the ventilation requirement of the battery pack.

7. The method for manufacturing the anti-condensation structure of a battery pack according to claim 6, characterized in that: The setting of the plurality of non-coating sub-areas comprises: The non-coating sub-area is two rectangles with a width of 3-7 mm, and the two rectangles are cross-shaped; The length of each rectangle is less than the width of the breathable membrane; The sum of the areas of the two rectangles is less than 1 / 4 of the area of ​​the breathable membrane.

8. The method for manufacturing the anti-condensation structure of a battery pack according to claim 7, characterized in that: When the plurality of non-coating sub-areas are set, the method further includes: Preset ejector pin bursting pressure threshold M1; Obtain the ejector pin bursting pressure design value M2 of the battery pack anti-condensation structure; If M1>M2, the non-coated sub-area is set to be a rectangle; If M1<M2, the non-coating sub-region is set to a polygonal structure.

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