FPC sealing device and battery pack

Abstract

The application discloses a kind of FPC sealing device and battery pack, comprising: baffle part;FPC support part, with FPC via for FPC main part passes;First seal, set in the first side of baffle part, and it is around FPC support part setting;Second seal, set in FPC via, to seal the gap between FPC main part and FPC via.FPC sealing device when using, FPC main part can be passed by FPC via in FPC support part, and the sealing of FPC main part FPC via is realized by second seal.FPC support part is inserted into the baffle via between battery compartment and electrical compartment, and it is sealed between baffle part and baffle by using first seal on baffle part.FPC sealing device can seal FPC main part, prevent heat runaway gas from entering electrical compartment by FPC main part at the span of battery compartment and electrical compartment, affect the safety of electronic device in electrical compartment.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to an FPC sealing device and a battery pack. Background Technology

[0002] A battery pack typically consists of a battery housing and a battery module. The battery housing usually includes a battery compartment and an electrical compartment, with the battery module housed within the battery compartment. The battery module comprises multiple individual cells, which can be connected in series or parallel.

[0003] Battery packs typically use FPC (Flexible Printed Circuit) components to detect voltage and temperature information. The main body of the FPC component is equipped with voltage and temperature acquisition units. The main body of the FPC needs to be connected to the battery management system inside the electrical compartment. Therefore, the main body of the FPC needs to cross from the battery compartment to the electrical compartment.

[0004] To prevent damage to electronic components within the electrical compartment in the event of battery thermal runaway, the battery compartment and the electrical compartment need to be isolated and sealed. When the FPC body crosses from the battery compartment to the electrical compartment, a hole needs to be made in the partition between them to allow the FPC body to pass through. This opening would affect the seal between the battery compartment and the electrical compartment.

[0005] Therefore, how to seal the main body of the FPC is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] In view of this, the purpose of this application is to provide an FPC sealing device for sealing the body of an FPC.

[0007] Another objective of this application is to provide a battery pack having the aforementioned FPC sealing device.

[0008] To achieve the above objectives, this application provides the following technical solution:

[0009] A first aspect of this application provides an FPC sealing device for a battery pack, the battery pack including a battery compartment, an electrical compartment, and an FPC assembly, the FPC assembly including an FPC body portion, the battery compartment and the electrical compartment being separated by a partition, the FPC sealing device being used to seal and fix the FPC body portion to the partition, the FPC sealing device comprising:

[0010] baffle section;

[0011] An FPC support portion is provided for inserting the partition through a partition hole. The FPC support portion is at least provided on the first side of the baffle portion and has an FPC through hole through which the FPC body portion passes.

[0012] A first sealing element is disposed on the first side of the baffle portion and surrounds the FPC support portion;

[0013] A second seal is disposed within the FPC through hole to seal the gap between the FPC body and the FPC through hole.

[0014] The FPC sealing device provided in this application allows the FPC main body to pass through the FPC through-hole of the FPC support, and the FPC through-hole of the FPC main body is sealed by a second sealing element. The FPC support is inserted into the through-hole of the partition between the battery compartment and the electrical compartment, and the first sealing element on the baffle part seals the space between the baffle part and the partition. With this configuration, when a single cell in the battery compartment experiences thermal runaway, the first sealing element surrounding the FPC support prevents the ejected thermal runaway gas from entering the through-hole of the partition, thus preventing it from entering the electrical compartment. Furthermore, because the FPC through-hole of the FPC support is sealed by the second sealing element, thermal runaway gas also cannot enter the electrical compartment through the FPC through-hole. The FPC sealing device provided in this application can seal the FPC main body, preventing thermal runaway gas from entering the electrical compartment through the FPC main body at the junction of the battery compartment and the electrical compartment, thus protecting the safety of the electronic components within the electrical compartment.

[0015] A second aspect of this application provides a battery pack, comprising:

[0016] The battery housing and battery pack are provided. The battery housing includes a battery compartment and an electrical compartment, which are separated by a partition. The partition has a partition through hole, and the battery pack is disposed in the battery compartment.

[0017] The FPC assembly includes an FPC body and a data acquisition unit disposed on the FPC body. The data acquisition unit is used to acquire temperature and / or voltage information of the battery pack. The FPC body extends into the electrical compartment through a partition through-hole.

[0018] The FPC sealing device is an FPC sealing device as described in any of the above claims, wherein the FPC support portion of the FPC sealing device is inserted into the partition through hole, the FPC body portion passes through the FPC through hole, and the gap between the FPC body portion and the FPC through hole is sealed by the second sealing member, the baffle portion is fixed to the partition, and the first sealing member is located between the baffle portion and the partition.

[0019] The battery pack provided in this application has all the technical effects of the aforementioned FPC sealing device, and will not be described in detail here. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a partial structural diagram of the battery pack disclosed in an embodiment of this application. Figure 1 ;

[0022] Figure 2 This is a partial structural diagram of the battery pack disclosed in an embodiment of this application. Figure 2 ;

[0023] Figure 3 This is a top view of the battery pack disclosed in the embodiments of this application;

[0024] Figure 4 for Figure 3 Sectional view along AA;

[0025] Figure 5 This is a schematic diagram of the structure of the FPC component disclosed in the embodiments of this application;

[0026] Figure 6 This is a partial structural diagram of the FPC component disclosed in an embodiment of this application from one angle.

[0027] Figure 7 This is a partial structural diagram of the FPC component disclosed in an embodiment of this application from another angle;

[0028] Figure 8 This is a schematic diagram of the FPC sealing device disclosed in an embodiment of this application at a certain angle.

[0029] Figure 9 This is a schematic diagram of the FPC sealing device disclosed in an embodiment of this application from another angle.

[0030] Figure 10 This is a top view of the FPC sealing device disclosed in the embodiments of this application;

[0031] Figure 11 for Figure 10 A cross-sectional view along BB.

[0032] The meanings of the various reference numerals in the figure are as follows:

[0033] 100 - FPC sealing device; 110 - Baffle part; 111 - Fixing hole; 112 - Reinforcing sleeve; 120 - FPC support part; 121 - FPC through hole; 130 - First seal; 140 - Second seal;

[0034] 200-FPC assembly; 210-FPC main body;

[0035] 300 - Battery housing; 310 - Battery compartment; 320 - Electrical compartment; 330 - Separator; 331 - Separator through hole. Detailed Implementation

[0036] This application discloses an FPC sealing device for sealing the main body of an FPC.

[0037] This application also discloses a battery pack having the above-described FPC sealing device.

[0038] Hereinafter, embodiments will be described with reference to the accompanying drawings. Furthermore, the embodiments shown below do not limit the scope of the application as described in the claims. Additionally, the complete composition represented in the embodiments below is not limited to what is necessary as the solution to the application described in the claims. It should be noted that, for ease of description, only the parts relevant to the application are shown in the drawings. Unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0039] Those skilled in the art will understand that a battery pack generally includes a battery housing, which is usually a closed or semi-closed structure made of materials such as metal or plastic. It is the physical carrier of the battery pack, and its design and manufacturing must meet the safety, reliability and functionality requirements of the battery pack in different usage scenarios.

[0040] The battery enclosure provides installation space for the battery pack, BMS (Battery Management System), cooling system, electrical connection components, etc., and through reasonable structural design, it fixes these components in the battery enclosure to ensure that they maintain a relatively stable position during battery pack operation and avoid damage to components or loosening of connections due to vibration, impact and other factors.

[0041] A battery box generally includes a box body and a battery box cover. The box body includes a bottom plate and side plates that are connected to and surround the bottom plate. The battery box cover is connected to the side plates and has a cover plate that is opposite to the bottom plate. The battery box cover and the box body together enclose a receiving chamber.

[0042] The battery casing can be cast from materials such as steel plates and aluminum alloys, or lightweight materials such as glass fiber reinforced composite materials and carbon fiber reinforced composite materials. The shape of the battery casing can be cylindrical, cuboid, cube, etc.

[0043] like Figures 1-4As shown, the battery housing 300 includes a battery compartment 310 and an electrical compartment 320. The core function of the battery compartment 310 is to provide installation space for the battery packs. The electrical compartment 320 is the place where the various battery packs in the battery compartment 310 are connected in series and parallel. Through the connection arrangement of the busbars in the electrical compartment 320, different battery packs can be connected according to design requirements to form a circuit system that meets the vehicle's power needs, while controlling and managing the charging and discharging process of the batteries.

[0044] The battery compartment 310 and the electrical compartment 320 are separated by a partition 330, the material of which can be the same as that of the main body of the battery box. The battery compartment 310 can be divided into multiple independent and sealed sub-battery compartments 310 by a partition beam; alternatively, only one battery compartment 310 may be provided. The partition 330 and the partition beam can be designed to be perpendicular, or arranged at other angles. The partition 330 and the partition beam can be glued to the inside of the main body of the battery box, or welded to the inside of the main body of the battery box. The electrical compartment 320 is a compartment in the battery box 300 used to house electrical components, such as a BMS (Battery Management System) and a BDU (Battery Disconnect Unit).

[0045] The partition 330 and the partition beam can be the horizontal and vertical beams inside the box body, which can separate and enhance the strength of the box body. The material can be high temperature resistant materials such as aluminum alloy, stainless steel, and iron.

[0046] A battery pack consists of multiple individual cells, which can be connected in series or parallel. Currently, battery packs typically utilize Fiber-Cured Processing (FPC) modules to monitor cell voltage and / or temperature. In a battery pack, the FPC module is not merely a simple wire, but a highly integrated sensor and signal transmission system. Its main function is to monitor the voltage and / or temperature of individual cells in real time and accurately, and to transmit this crucial data to the battery management system.

[0047] FPC components generally include an FPC body and a data acquisition unit (voltage acquisition unit / temperature acquisition unit, etc.). The FPC body is used to transmit the relevant information collected by the data acquisition unit to the battery management system, so that the battery management system can analyze and judge the battery status.

[0048] Since the battery management system is located in the electrical compartment 320 and the battery is located in the battery compartment 310, the acquisition unit needs to collect relevant battery data in the battery compartment 310 and transmit it to the battery management system in the electrical compartment 320 through the FPC main unit. This requires the FPC main unit to extend from the battery compartment 310 into the electrical compartment 320.

[0049] To allow the FPC main body to cross between the battery compartment 310 and the electrical compartment 320, a partition through-hole 331 needs to be made in the partition 330 (i.e., the partition 330 separating the battery compartment 310 and the electrical compartment 320). The FPC main body extends into the electrical compartment 320 through the partition through-hole 331. However, there will inevitably be a gap between the FPC main body and the inner wall of the partition through-hole 331. This gap will affect the sealing between the battery compartment 310 and the electrical compartment 320. Thermal runaway gas in the battery compartment 310 can enter the electrical compartment 320 through this gap, damaging the electronic components in the electrical compartment 320.

[0050] Based on this, this application discloses an FPC sealing device 100 for a battery pack. As described above, the battery pack generally includes a battery compartment 310, an electrical compartment 320, and an FPC assembly 200. The FPC assembly 200 includes an FPC body 210. The battery compartment 310 and the electrical compartment 320 are separated by a partition 330. The FPC body 210 passes through the partition 330. The FPC sealing device 100 is used to seal and fix the FPC body 210 to the partition 330 to prevent thermal runaway gas in the battery compartment 310 from entering the electrical compartment 320.

[0051] like Figures 4-9 As shown, the FPC sealing device 100 includes a baffle portion 110, an FPC support portion 120, a first seal 130, and a second seal 140.

[0052] The FPC support portion 120 is provided at least on the first side of the baffle portion 110. When the FPC sealing device 100 is installed on the partition 330 between the battery compartment 310 and the electrical compartment 320, the first side of the baffle portion 110 is positioned towards the partition 330, so that the FPC support portion 120 can be inserted into the partition through hole 331 on the partition 330.

[0053] like Figure 8 and Figure 9 As shown, the FPC support 120 has an FPC through-hole 121 through which the FPC main body 210 passes, and the FPC support 120 can support the FPC main body 210. During installation, the FPC support 120 is inserted into the partition through-hole 331 on the partition 330, and the FPC main body 210 passes through the FPC through-hole 121 of the FPC support 120 from the battery compartment 310 into the electrical compartment 320. Based on this structure, it is necessary to seal the gap between the FPC through-hole 121 and the FPC main body 210, and also to seal the gap between the FPC support 120 and the partition through-hole 331.

[0054] like Figure 10 and Figure 11As shown, a first seal 130 is disposed on the first side of the baffle portion 110 and surrounds the FPC support portion 120. This allows the first seal 130 to seal the first side of the baffle portion 110 and the partition 330 when the FPC sealing device 100 is fixed to the partition 330. A second seal 140 is disposed within the FPC through hole 121 to seal the gap between the FPC body portion 210 and the FPC through hole 121.

[0055] The FPC sealing device 100 disclosed in this application allows the FPC main body 210 to pass through the FPC through-hole 121 of the FPC support 120 during use, and the FPC main body 210 to be sealed through the FPC through-hole 121 by the second sealing member 140. The FPC support 120 is inserted into the partition through-hole 331 between the battery compartment 310 and the electrical compartment 320, and the first sealing member 130 on the baffle 110 seals the baffle 110 with the partition 330. With this configuration, when a single battery cell in the battery compartment 310 experiences thermal runaway, the first sealing member 130 surrounds the FPC support 120, preventing the ejected thermal runaway gas from entering the partition through-hole 331, i.e., preventing it from entering the electrical compartment 320 through the partition through-hole 331. Furthermore, since the FPC through-hole 121 of the FPC support portion 120 is sealed by the second seal 140, thermal runaway gas cannot enter the electrical compartment 320 through the FPC through-hole 121. The FPC sealing device 100 provided in this application can seal the FPC body portion 210 to prevent thermal runaway gas from entering the electrical compartment 320 through the FPC body portion 210 at the junction of the battery compartment 310 and the electrical compartment 320, thereby affecting the safety of the electronic components inside the electrical compartment 320.

[0056] In one specific embodiment of this application, a fixing hole 111 is provided on the baffle portion 110, and the fixing hole 111 is used to pass through the fixing member. In this embodiment, by providing the fixing hole 111 on the baffle portion 110, the baffle portion 110 can be fixed to the partition 330 by fixing members such as bolts. For example, a threaded hole is provided on the partition 330. When the FPC sealing device 100 is installed, the fixing member passes through the fixing hole 111 on the baffle portion 110 and locks the fixing member on the threaded hole on the partition 330. As the fixing member is locked, the baffle portion 110 gradually presses the partition 330, so that the first sealing member 130 located between the baffle portion 110 and the partition 330 is squeezed and deformed, thereby achieving the effect of sealing the partition through hole 331 within its surrounding range.

[0057] Of course, the partition 330 may not have threaded holes, but instead have smooth holes similar to the fixing holes 111 on the baffle 110, and bolts and nuts may be used as fasteners. When the FPC sealing device 100 is installed, bolts are passed through the fixing holes on the baffle 110 and the partition 330 in sequence, and the bolts and nuts are tightened, so that the baffle 110 presses against the partition 330, and the first sealing element 130 located between the baffle 110 and the partition 330 is squeezed and deformed, thereby sealing the partition through hole 331 within its surrounding area.

[0058] It should be noted that, given the sealing requirements of the battery pack, those skilled in the art can choose to seal the location of the fastener with sealant to prevent leakage of thermal runaway gas from the gap between the fastener and the corresponding opening (fixed hole / threaded hole).

[0059] In addition, the baffle portion 110 can also be glued to the partition 330, that is, without setting a fastener, the baffle portion 110 is fixed to the partition 330 by adhesive. This embodiment does not limit the way the baffle portion 110 is fixed to the partition 330.

[0060] In this embodiment, the fixing hole 111 is located on the side of the first seal 130 away from the FPC support portion 120. That is, the fixing hole 111 is located on the outer side of the area surrounded by the first seal 130, preventing damage to the sealing function of the first seal 130 by placing the fixing hole 111 within the sealing area of ​​the first seal 130. With this arrangement, even if the fixing hole 111 is located on the baffle portion 110, thermal runaway gas will not enter the electrical compartment 320 through the opening in the partition 330.

[0061] Since a fastener needs to pass through the fixing hole 111, and the fastener is usually a metal part with high hardness, while the baffle part 110 is usually an injection molded part with low hardness, the fastener will damage the inner wall of the fixing hole 111, resulting in a decrease in sealing. Based on this, in this embodiment, a reinforcing sleeve 112 is embedded in the fixing hole 111, and the hardness of the reinforcing sleeve 112 is greater than that of the baffle part 110.

[0062] In this embodiment, by embedding a reinforcing sleeve 112 with higher hardness inside the fixing hole 111, the wear resistance is better, and it is not easily damaged by the fixing component, thus reducing the sealing performance. The reinforcing sleeve 112 can be a metal part, such as choosing the same material as the fixing component, or choosing a material with a hardness greater than that of the fixing component.

[0063] In one specific embodiment of this application, an FPC support portion 120 is provided on both the first and second sides of the baffle portion 110, and the first and second sides of the baffle portion 110 are opposite sides. This arrangement allows the FPC support portion 120 used to support the FPC body portion 210 to have a greater length, thereby providing more stable support for the FPC body portion 210. It should be noted that the FPC support portion 120 may also be provided only on the first side of the baffle portion 110.

[0064] The FPC support portions 120 located on both sides of the baffle portion 110 can be an integral structure. The baffle portion 110 has support fixing holes that penetrate the wall thickness, and the FPC support portions 120 pass through and are sealed and fixed in the support fixing holes. That is, in this embodiment, the baffle portion 110 and the FPC support portions 120 can be two parts and are manufactured separately. The baffle portion 110 has support fixing holes, and the FPC support portions 120 are inserted into the support fixing holes, and the baffle portion 110 has FPC support portions 120 of corresponding length on both sides, so that the battery compartment 310 and the electrical compartment 320 have a supporting effect on the FPC main body 210.

[0065] Furthermore, the FPC support portion 120 and the baffle portion 110 need to be sealed and fixed. For example, sealant can be applied between the FPC support portion 120 and the inner wall of the support portion fixing hole to achieve sealing and fixing of the FPC support portion 120 and the baffle portion 110. Of course, other sealing methods can also be used, and this application is not limited to sealant as the only sealing method.

[0066] The FPC support portions 120 located on both sides of the baffle portion 110 can also be fixed to both sides of the baffle portion 110 respectively. That is, the FPC support portions 120 located on both sides of the baffle portion 110 are not directly connected, but are connected to the baffle portion 110.

[0067] To achieve communication between the FPC support portions 120 on both sides of the baffle portion 110, ensuring that the FPC main body portion 210 can be inserted from one FPC support portion 120 into the FPC through hole 121 of the other FPC support portion 120, in this embodiment, the baffle portion 110 has a baffle through hole that penetrates the wall thickness, and the FPC through holes 121 of both FPC support portions 120 are sealed and connected to the baffle through hole. That is, the FPC main body portion 210 can pass through the FPC through hole 121 of one FPC support portion 120, enter the baffle through hole of the baffle portion 110, and then pass through the FPC through hole 121 of the other FPC support portion 120 and exit. In this way, the FPC main body portion 210 can pass through the FPC sealing device 100, realizing the crossing from the battery compartment 310 to the electrical compartment 320.

[0068] In one specific embodiment of this application, the FPC support portions 120 located on both sides of the baffle portion 110 have equal lengths, that is, the FPC support portions 120 located on both sides of the baffle portion 110 are symmetrically arranged along the baffle portion 110. This arrangement ensures that the FPC support portions 120 on both sides of the baffle portion 110 have the same supporting effect on the FPC main body portion 210.

[0069] It should be noted that the length of the FPC support portion 120 is the dimension along the direction perpendicular to the first side of the baffle portion 110 (i.e., the surface where the first side of the baffle portion 110 is located), that is, the dimension by which the FPC support portion 120 extends out of the baffle portion 110.

[0070] The lengths of the FPC support portions 120 located on both sides of the baffle portion 110 may also be unequal. For ease of understanding, the FPC support portion 120 located on the first side of the baffle portion 110 is defined as the first FPC support portion, and the FPC support portion 120 located on the second side of the baffle portion 110 is defined as the second FPC support portion.

[0071] The length of the first FPC support is greater than the length of the second FPC support. That is, in this embodiment, the length of the first FPC support on the side of the baffle portion 110 where the first seal 130 is provided is designed to be longer. Since the space inside the electrical compartment 320 is larger than that inside the battery compartment 310, most of the FPC sealing device 100 can remain inside the electrical compartment 320 during installation. In other words, during actual installation, the first FPC support can be inserted into the partition through hole 331 in the electrical compartment 320, so that the baffle portion 110 and the second FPC support remain inside the electrical compartment 320.

[0072] Specifically, the long end of the FPC support (i.e., the first FPC support) can be inserted into the partition through-hole 331 on the partition 330 within the electrical compartment 320. Then, the fastener is tightened from the electrical compartment 320 side, pressing the baffle 110 against the partition 330 and compressing the first seal 130 between the baffle 110 and the partition 330. Finally, the connector of the FPC assembly 200 is inserted into the BMS located in the electrical compartment 320. The entire process eliminates the need for complex fastening and sealing operations within the narrow and hazardous battery compartment 310, improving assembly safety and efficiency.

[0073] In this embodiment, the length of the first FPC support portion inserted into the partition through hole 331 is designed to be longer. For example, the length difference between the first FPC support portion and the second FPC support portion can be designed to be the thickness of the partition 330, so that the length of the first FPC support portion extending into the battery compartment 310 is the same as the length of the second FPC support portion, ensuring that the support effect of the FPC sealing device 100 in the battery compartment 310 and the electrical compartment 320 is basically the same.

[0074] It should be noted that the length difference between the first FPC support and the second FPC support can also be designed according to requirements and is not limited to the thickness of the separator 330. For example, the length difference between the first FPC support and the second FPC support can be designed to be less than the thickness of the separator 330, so that the length of the first FPC support extending into the battery compartment 310 is smaller, reducing the occupancy of the battery compartment 310.

[0075] Furthermore, in this embodiment, the lengths of the first FPC support and the second FPC support are designed to be different, making it easier for the operator to distinguish the FPC support inserted into the partition through hole 331 when installing the FPC sealing device 100. This ensures that the side of the baffle portion 110 with the first sealing element 130 can face the partition 330, avoiding the situation where the baffle portion 110 and the partition 330 cannot be sealed due to incorrect installation direction.

[0076] In one specific embodiment of this application, the FPC support portion 120 and the baffle portion 110 are an integral structure. The FPC support portion 120 and the baffle portion 110 can be injection molded, allowing them to be directly made into a complete part without subsequent assembly, thus eliminating errors caused by assembling multiple parts. In this embodiment, a sealing ring mounting groove (the mounting groove of the first seal 130) with precise dimensions and clear contours can be directly injection molded onto the baffle portion 110 using a mold, ensuring that the first seal 130 is installed in the correct position and compressed evenly, thereby achieving a reliable seal.

[0077] like Figure 11 As shown in a specific embodiment of this application, the second seal 140 is distributed throughout the FPC through-hole 121 along the length of the FPC support portion 120, which provides a better sealing effect. Since the cross-sectional area of ​​the FPC through-hole 121 is small, the installation of the second seal 140 is difficult. To facilitate the installation of the second seal 140, it can also be arranged at least at one end of the FPC through-hole 121, that is, the second seal 140 does not completely cover the FPC through-hole 121, but is only provided at the end of the FPC through-hole 121, to facilitate installation.

[0078] It should be noted that, in order to facilitate the passage of the FPC main body 210 through the FPC through hole 121, the FPC sealing device 100 can also be designed as two symmetrically arranged and detachable parts. These two parts can be arranged vertically or horizontally. After the FPC main body is inserted into the FPC through hole 121, the two parts are assembled to reduce the installation difficulty when it can only be inserted and passed through one end of the FPC through hole 121.

[0079] The height of the first seal 130 protruding from the first side of the baffle portion 110 can be designed according to requirements. The goal is to ensure the sealing effect of the first seal 130 while avoiding increased costs due to excessive thickness of the first seal 130.

[0080] In one specific embodiment of this application, the material of the first sealing member 130 can be fluororubber, silicone rubber, ethylene propylene rubber, or hydrogenated nitrile rubber; the material of the second sealing member 140 can be fluororubber, silicone rubber, ethylene propylene rubber, or hydrogenated nitrile rubber. The materials of the baffle portion 110 and the FPC support portion 120 can be engineering plastics or metal.

[0081] Engineering plastics can include PBT (polybutylene terephthalate), PA66+GF, PPS (polyphenylene sulfide), PPA (polyphthalamide), LCP (Liquid Crystal Polymer), etc.

[0082] PA66+GF is a mixture of PA66 (Polyadiohexylenediamine, commonly known as Nylon-66) and GF (Glass fiber), forming glass fiber reinforced nylon. The metal materials used to prepare the baffle portion 110 and the FPC support portion 120 include aluminum alloys and titanium alloys. The insulating layer on the surface of the baffle portion 110 and the FPC support portion 120 can be a sprayed insulating coating or a covered insulating film.

[0083] like Figures 1-4 As shown in the figure, this application embodiment also discloses a battery pack, which includes a battery housing 300, a battery pack, an FPC assembly 200, and an FPC sealing device 100.

[0084] The battery housing 300 includes a battery compartment 310 and an electrical compartment 320, which are separated by a partition 330. The partition 330 has a partition through-hole 331, and the battery pack is disposed inside the battery compartment 310. The structure of the battery housing 300 can be referred to the previous text, and will not be repeated here.

[0085] The FPC assembly 200 includes an FPC main body 210 and a data acquisition unit 220 disposed on the FPC main body 210. The data acquisition unit 220 is used to acquire temperature and / or voltage information of the battery pack. Specifically, the position and number of data acquisition units, such as voltage acquisition units and temperature acquisition units, can be selected according to the detection requirements. The FPC main body 210 extends into the electrical compartment 320 through a partition through-hole 331.

[0086] The FPC sealing device 100 is the FPC sealing device 100 disclosed in the above embodiments. The battery pack disclosed in this application embodiment has the above-mentioned FPC sealing device 100, and therefore has all the technical effects of the above-mentioned FPC sealing device 100. It will not be repeated here.

[0087] The FPC support portion 120 of the FPC sealing device 100 is inserted into the partition through hole 331, the FPC body portion 210 passes through the FPC through hole 121, and the gap between the FPC body portion 210 and the FPC through hole 121 is sealed by the second seal 140. The baffle portion 110 is fixed on the partition 330, and the first seal 130 is located between the baffle portion 110 and the partition 330.

[0088] The battery compartment 310 and the electrical compartment 320 need to be sealed and isolated by the partition 330. When the battery compartment 310 is thermally runaway, it will generate high-temperature and high-pressure gas, which will damage the first seal 130 between the FPC sealing device 100 and the partition 330.

[0089] To overcome the aforementioned problems, in this embodiment, the FPC sealing device 100 is mounted on the partition 330 from the electrical compartment 320, such that the first sealing element 130 is located on the side wall of the partition 330 facing the electrical compartment 320. This arrangement ensures that the first sealing element 130, used to seal the FPC sealing device 100 with the partition 330, is located within the electrical compartment 320, i.e., away from the battery compartment 310. This reduces the impact of high-temperature gases generated by thermal runaway on the first sealing element 130, thereby lowering the risk of seal failure.

[0090] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0091] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0092] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0093] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. An FPC sealing device, characterized in that, For a battery pack, the battery pack includes a battery compartment (310), an electrical compartment (320), and an FPC assembly (200), the FPC assembly (200) including an FPC body (210), the battery compartment (310) and the electrical compartment (320) being separated by a partition (330), the FPC sealing device being used to seal and fix the FPC body (210) to the partition (330), the FPC sealing device including: Baffle (110); FPC support (120) for inserting through the partition (330) through hole of the partition (330), the FPC support (120) is provided at least on the first side of the baffle (110) and has an FPC through hole (121) through which the FPC body (210) passes. A first sealing element (130) is disposed on the first side of the baffle portion (110) and is disposed around the FPC support portion (120); A second seal (140) is disposed within the FPC through hole (121) to seal the gap between the FPC body (210) and the FPC through hole (121).

2. The FPC sealing device as described in claim 1, characterized in that, The baffle portion (110) is provided with a fixing hole (111), which is used to pass through the fixing member, and the fixing hole (111) is located on the side of the first sealing member (130) away from the FPC support portion (120).

3. The FPC sealing device as described in claim 2, characterized in that, A reinforcing sleeve (112) is embedded in the fixing hole (111), and the hardness of the reinforcing sleeve (112) is greater than that of the baffle part (110).

4. The FPC sealing device as described in claim 3, characterized in that, The reinforcing sleeve (112) is a metal part.

5. The FPC sealing device as described in claim 1, characterized in that, The first and second sides of the baffle portion (110) are provided with the FPC support portion (120), and the first and second sides of the baffle portion (110) are opposite sides.

6. The FPC sealing device as described in claim 5, characterized in that, The FPC support portion (120) located on both sides of the baffle portion (110) is an integral structure. The baffle portion (110) has a support portion fixing hole that penetrates the wall thickness. The FPC support portion (120) passes through and is sealed and fixed in the support portion fixing hole.

7. The FPC sealing device as described in claim 5, characterized in that, The FPC support portions (120) located on both sides of the baffle portion (110) are respectively fixed to both sides of the baffle portion (110); The baffle portion (110) has a baffle through hole that penetrates the wall thickness, and the FPC through holes (121) of the two FPC support portions (120) are sealed and connected to the baffle through hole.

8. The FPC sealing device as described in claim 5, characterized in that, The FPC support portions (120) located on both sides of the baffle portion (110) have equal lengths, and the length of the FPC support portion (120) is the dimension along the direction perpendicular to the first side of the baffle portion (110).

9. The FPC sealing device as described in claim 5, characterized in that, The FPC support portion (120) located on the first side of the baffle portion (110) is the first FPC support portion, and the FPC support portion (120) located on the second side of the baffle portion (110) is the second FPC support portion; The length of the first FPC support is greater than the length of the second FPC support, and the length of the FPC support (120) is the dimension along the direction perpendicular to the first side of the baffle (110).

10. The FPC sealing device according to any one of claims 1-9, characterized in that, The FPC support (120) and the baffle (110) are an integral structure.

11. The FPC sealing device according to any one of claims 1-9, characterized in that, Along the length of the FPC support (120), the second seal (140) is distributed throughout the FPC through-holes (121).

12. The FPC sealing device according to any one of claims 1-9, characterized in that, Along the length of the FPC support (120), the second seal (140) is disposed at least at one end of the FPC through hole (121).

13. The FPC sealing device according to any one of claims 1-9, characterized in that, The material of the first sealing element (130) is fluororubber, silicone rubber, ethylene propylene rubber or hydrogenated nitrile rubber; And / or, The material of the second seal (140) is fluororubber, silicone rubber, ethylene propylene rubber or hydrogenated nitrile rubber.

14. The FPC sealing device according to any one of claims 1-9, characterized in that, The baffle portion (110) and the FPC support portion (120) are made of engineering plastics or metal; When the baffle portion (110) and the FPC support portion (120) are made of metal, an insulating layer is provided on the surface of the baffle portion (110) and the FPC support portion (120).

15. A battery pack, characterized in that, include: The battery housing (300) and battery pack are provided. The battery housing (300) includes a battery compartment (310) and an electrical compartment (320). The battery compartment (310) and the electrical compartment (320) are separated by a partition (330). The partition (330) has a partition through hole (331). The battery pack is disposed in the battery compartment (310). The FPC assembly (200) includes an FPC body (210) and a data acquisition unit (220) disposed on the FPC body (210). The data acquisition unit (220) is used to acquire temperature and / or voltage information of the battery pack. The FPC body (210) extends into the electrical compartment (320) through a partition through-hole (331). The FPC sealing device (100) is an FPC sealing device as described in any one of claims 1-14, wherein the FPC support portion (120) of the FPC sealing device (100) is inserted into the partition through hole (331), the FPC body portion (210) passes through the FPC through hole (121) and the gap between the FPC body portion (210) and the FPC through hole (121) is sealed by the second sealing member (140), the baffle portion (110) is fixed on the partition (330), and the first sealing member (130) is located between the baffle portion (110) and the partition (330).

16. The battery pack as claimed in claim 15, characterized in that, The FPC sealing device (100) is mounted on the partition (330) by the electrical compartment (320) such that the first seal (130) is located on the side wall of the partition (330) facing the electrical compartment (320).

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