Battery pack protection cover, battery pack and battery pack auxiliary installation tool

Abstract

This application belongs to the field of battery technology and discloses a battery pack protective cover, a battery pack, and a battery pack auxiliary installation fixture. The battery pack protective cover includes: a cover plate body and a top plate structure. The side wall of the cover plate body is provided with multiple wire grooves, which penetrate the side wall of the cover plate body and extend from the top end to the bottom end of the cover plate body. The wire grooves are used to lead out the wiring harness of the battery pack. The top end of the cover plate body is provided with an opening. The top plate structure includes a support plate, which covers the opening of the cover plate body. The bottom edge of the support plate extends towards the cover plate body and is provided with a limiting guide plate. The limiting guide plate is inserted into the side wall of the cover plate body and is staggered from the wire grooves.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, specifically relating to a battery pack protective cover, a battery pack, and a battery pack auxiliary installation fixture. Background Technology

[0002] In the process of assembling existing thermal runaway test battery packs, the cover, which is modified according to the design digital model, is difficult to be compatible with the large and complex wiring harness network. During on-site installation, secondary processing and hole enlargement are required according to the wiring harness routing and quantity, which is complicated and can easily damage the cover. In addition, the complex internal wiring harness makes it difficult to close and seal the cover, resulting in poor battery pack sealing. Utility Model Content

[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a battery pack protective cover, a battery pack, and a battery pack auxiliary installation fixture.

[0004] A first aspect of this utility model provides a battery pack protective cover, comprising:

[0005] The cover plate body has multiple wire grooves on its side wall, which penetrate the side wall of the cover plate body and extend from the top to the bottom of the cover plate body. The wire grooves are used to lead out the wiring harness of the battery pack. The top of the cover plate body has an opening.

[0006] The top plate structure includes a support plate that covers the top opening of the cover plate body. The bottom edge of the support plate extends toward the cover plate body and is provided with a limiting guide plate. The limiting guide plate is inserted into the side wall of the cover plate body and is offset from the wire groove.

[0007] The battery pack protective cover provided by this utility model can accurately route wires according to the requirements of the battery pack thermal spread test scheme through multiple wire grooves set on the cover body, ensuring the stable routing of the wire harness within the cover body without compression or bending of the tip. It can also ensure that the cover body and the top plate structure can be easily closed. In addition to ensuring the structural strength and sealing performance of the battery pack thermal spread test, it can also achieve multi-wire harness compatibility and improve installation convenience.

[0008] In addition, the battery pack protective cover of this utility model may also have the following additional technical features:

[0009] Preferably, the cover plate body is a square frame structure, and the wire groove is formed on at least two side walls of the cover plate body.

[0010] Preferably, the wire groove is formed on at least two adjacent side walls of the cover plate body, or the wire groove is formed on two opposite side walls of the cover plate body, and the wire grooves on the opposite side walls are arranged opposite to each other or staggered.

[0011] Preferably, the wire channel is a U-shaped wire channel, and the wire channel is connected to the top opening of the cover plate body.

[0012] Preferably, a sealing element is provided in the wire groove, the shape of which is adapted to the wire groove for sealing the wire groove after the wiring harness of the battery pack is assembled into the wire groove.

[0013] Preferably, the sealing element includes a rubber sealing ring, and a first U-shaped groove is provided on the outer side of the rubber sealing ring, the first U-shaped groove engaging with the side wall of the cover plate body at the wire groove;

[0014] or / and,

[0015] The inner side of the rubber sealing ring is provided with a second U-shaped groove, which is used to constrain the wiring harness of the battery pack.

[0016] Preferably, the wire channel is provided with an insert plate, which is used to insert and cooperate with the wire channel when the wire harness of the battery pack is not installed in the wire channel, so as to seal the wire channel.

[0017] Preferably, the support plate has a first mounting hole, which is used to assemble an explosion-proof valve cover plate.

[0018] A second aspect of this utility model provides a battery pack, comprising: a housing and a battery pack protective cover as described in any embodiment of this application, wherein a first flange is provided at the bottom end of the cover body and a second flange is provided at the top end of the housing, and the cover body and the housing are fixedly connected and fitted together through the first flange and the second flange.

[0019] A third aspect of this utility model provides a battery pack auxiliary installation fixture, which is used to assist in the installation of the battery pack described in any embodiment of this application, so as to press the housing and the battery pack protective cover together tightly.

[0020] The battery pack auxiliary installation fixture includes: a support frame, wherein the support frame has a second mounting hole at least on its two adjacent sides, and an adjusting rod is slidably fitted in the second mounting hole. One end of the adjusting rod is provided with a limit baffle, and the other end is provided with a locking member that can be rotatably constrained on the adjusting rod and moves along the axial direction of the adjusting rod under its own rotation.

[0021] A clamping space is formed between the support frame and the limiting baffle to constrain the second flange of the housing and the battery pack protective cover. Under the rotational adjustment of the locking member, the support frame abuts against the top of the battery pack protective cover, and the limiting baffle abuts against the side wall of the second flange away from the first flange.

[0022] Preferably, a sealing gasket is provided on the side of the support frame near the limiting baffle, and the sealing gasket is conformally matched to the support frame.

[0023] Preferably, multiple adjusting rods are spaced apart on the same side of the support frame, and the multiple adjusting rods on the same side of the support frame share the same limiting baffle.

[0024] Preferably, a clamping plate is provided inside the support frame, which is used to clamp and cooperate with the explosion-proof valve cover of the battery pack.

[0025] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0027] Figure 1 A perspective view of the battery pack protective cover provided in an embodiment of this application;

[0028] Figure 2 A perspective structural diagram of the cover plate body provided in the embodiments of this application;

[0029] Figure 3 A three-dimensional structural diagram of the top plate structure provided in the embodiments of this application;

[0030] Figure 4 A three-dimensional structural diagram of the cover plate body assembly wiring harness and insert plate provided in the embodiments of this application;

[0031] Figure 5 A perspective view of the sealing element provided in the embodiments of this application;

[0032] Figure 6 This is a structural diagram of the insert plate and sealant provided in an embodiment of this application;

[0033] Figure 7 This is a perspective view of the battery pack provided in an embodiment of this application;

[0034] Figure 8 A perspective view of the battery pack auxiliary installation fixture provided in the embodiments of this application being installed on the battery pack;

[0035] Figure 9 This is a structural diagram of the battery pack auxiliary installation fixture provided in the embodiments of this application;

[0036] Figure 10 A perspective view of the combination of the battery pack auxiliary installation fixture and the battery pack protective cover provided in the embodiments of this application;

[0037] Figure 11 This is a structural diagram of the support frame and sealing gasket provided in an embodiment of this application.

[0038] In the above diagram: 100 Protective cover; 110 Cover plate body; 111 Wire channel; 112 First flange; 120 Top plate structure; 121 Support plate; 1210 First mounting hole; 122 Limiting guide plate;

[0039] 130 Seal; 131 Rubber sealing ring; 132 First U-shaped groove; 133 Second U-shaped groove;

[0040] 140 Insert plate; 150 Sealant; 160 Explosion-proof valve cover; 161 Explosion-proof valve;

[0041] 200 Battery pack; 210 Housing; 211 Second flange; 220 Wiring harness;

[0042] 300 Battery pack auxiliary installation fixture; 310 Support frame; 320 Adjusting rod; 330 Limiting baffle; 340 Locking component; 350 Sealing gasket; 360 Pressure plate. Detailed Implementation

[0043] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0044] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0045] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” as used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0046] Unless the context otherwise requires, throughout the specification and claims, the term "comprising" is interpreted as open and encompassing, that is, "including, but not limited to".

[0047] In the description of this specification, the terms "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples.

[0048] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0049] The first aspect of this utility model, with reference to... Figures 1 to 4 A battery pack protective cover 100 is provided, comprising:

[0050] The cover plate body 110 has multiple wire grooves 111 on its side wall. The wire grooves 111 penetrate the side wall of the cover plate body 110 and extend from the top end to the bottom end of the cover plate body 110. The wire grooves 111 are used to lead out the wiring harness 220 of the battery pack 200. The top end of the cover plate body 110 has an opening.

[0051] The top plate structure 120 includes a support plate 121, which covers the top opening of the cover plate body 110. The bottom edge of the support plate 121 extends toward the cover plate body 110 and is provided with a limiting guide plate 122. The limiting guide plate 122 is inserted into the side wall of the cover plate body 110 and is offset from the wire groove 111.

[0052] Specifically, multiple wire grooves 111 are formed on the side wall of the cover body 110. Each wire groove 111 is a recess with an open end at the top. The wire grooves 111 can penetrate the corresponding side wall of the cover body 110. The number, position distribution, size, and shape of the wire grooves 111 can be set according to actual needs, and this application does not impose any special limitations. For example, the number of wire grooves 111 can be 2 to 14, such as 4, 6, 7, 10, 12, etc. The wire grooves 111 can be evenly or unevenly distributed on the cover body 110. The dimensions of the multiple wire grooves 111 can be the same or different, and the shape of the wire grooves 111 can be U-shaped, arc-shaped, square, etc. The width and depth of the wire grooves 111 are determined based on the maximum single diameter of the wire harness 220 of the battery pack 200 and the height of the cover body 110, ensuring that the difference between the width of the wire groove 111 and the maximum single diameter of the wire harness 220 is not less than 4 mm, and that the depth of the wire groove 111 meets the mechanical structural requirements.

[0053] The top plate structure 120 includes a support plate 121 and limiting guide plates 122 extending from the bottom periphery of the support plate 121 toward the cover plate body 110. The support plate 121 and the multiple limiting guide plates 122 enclose and form a top plate structure 120 with an internal cavity, allowing the top plate structure 120 to be fitted onto the outside of the cover plate body 110. The support plate 121 and the limiting guide plates 122 can be integrally molded from the same material, simplifying the processing technology and saving manufacturing costs. For example, it can be made of the same material. The limiting guide plate 122 can be formed by stamping and bending using sheet metal stamping parts, carbon steel plates (SPCC), etc. The height of the limiting guide plate 122 is adjusted according to the height of the cover plate body 110. The height of the limiting guide plate 122 does not exceed the height of the cover plate body 110. The cross-sectional area of ​​multiple limiting guide plates 122 located on the same side wall of the cover plate body 110 does not exceed 50% of the cross-sectional area of ​​the corresponding side wall of the cover plate body 110, ensuring the ease of installation of the top plate structure 120 and the cover plate body 110.

[0054] The cover body 110 and the top plate structure 120 have a first state of mutual insertion and a second state of mutual separation. In the first state, the support plate 121 covers the top opening of the cover body 110 and seals the wire groove 111, thereby constraining the wire harness 220 of the battery pack 200 within the wire groove 111 and preventing the wire harness 220 from being led out from the top of the wire groove 111, ensuring the smooth closing of the battery pack protective cover 100; and during the process of the support plate 121 covering the cover body 110, the limiting and guiding effect of the limiting guide plate 122 makes the installation and disassembly between the top plate structure 120 and the cover body 110 convenient.

[0055] The limiting guide plate 122 is staggered from the wire groove 111 to avoid interference with the wire harness 220 leading out of the wire groove 111. The number of limiting guide plates 122 can be set according to actual needs. For example, the number of limiting guide plates 122 can be 2 to 10. The limiting guide plates 122 are provided on at least two adjacent sides of the bottom edge of the support plate 121; or, the limiting guide plates 122 are provided on opposite sides. Preferably, the limiting guide plates 122 are provided on all four sides of the bottom edge of the support plate 121 (e.g., two limiting guide plates 122 are provided on each side of the support plate 121). This ensures smooth insertion and cooperation between the top plate structure 120 and the cover plate body 110, and can improve the overall connection strength and sealing of the battery pack protective cover 100, meeting the requirements of the whole pack thermal runaway or thermal propagation test of the battery pack 200. The whole pack thermal propagation test is to evaluate the combustion performance and heat release performance by simulating the combustion behavior of the battery under thermal runaway conditions.

[0056] The battery pack protective cover 100 provided by this utility model has a simple structure. Through multiple wire grooves 111 provided on the cover body 110, precise wiring can be carried out according to the requirements of the whole pack thermal spread test scheme of the battery pack 200, ensuring the stable routing of the wire harness 220 within the cover body 110 without compression or tip bending. It can also ensure that the cover body 110 and the top plate structure 120 can be easily closed. In addition to ensuring the structural strength and sealing performance of the whole pack thermal spread test of the battery pack 200, it can also achieve compatibility of multiple wire harnesses 220 and improve the ease of installation.

[0057] In some implementations, reference Figures 1 to 4 The cover plate body 110 has a square frame structure, and the wire groove 111 is formed on at least two side walls of the cover plate body 110. Further, the wire groove 111 is formed on at least two adjacent side walls of the cover plate body 110, or the wire groove 111 is formed on two opposite side walls of the cover plate body 110, and the wire grooves 111 on the opposite side walls are arranged opposite to each other or staggered.

[0058] Specifically, the battery pack 200 includes different types and sizes of wiring harnesses 220, such as high-voltage wiring harnesses 220 and low-voltage wiring harnesses 220, and the positions and layouts of each wiring harness 220 are also different. The wire channel 111 can be formed on two or three adjacent side walls of the cover body 110 (e.g., Figure 1 and Figure 2As shown, the wire grooves 111 can also be formed on the four side walls of the cover body 110, or on two opposite side walls of the cover body 110. The wire grooves 111 penetrate the corresponding side walls of the cover body 110 along the thickness direction of the side walls, and the wire grooves 111 are connected to the inside and outside of the cover body 110, so that the wire harnesses 220 of the battery pack 200 are led out from inside the cover body 110 through the wire grooves 111. The number, shape, and size of the wire grooves 111 formed on each side wall can be the same or different. The shape and size of the wire grooves 111 formed on the same side wall can be the same or different. Multiple wire grooves 111 on the same side wall can be distributed at equal or non-equal intervals to meet different wire harness 220 position and size requirements. For example, the number of wire grooves 111 on the same side wall of the cover body 110 is 2 to 6, such as 2, 3, 5, etc. on the same side wall.

[0059] In this example, the wire grooves 111 opened on adjacent or opposite sidewalls can allow the wire harness 220 inside the battery pack 200 to bend and lead out in different directions, and also allow the wire harness 220 to be led out nearby.

[0060] It should be noted that multiple wire harnesses 220 of the same diameter or multiple wire harnesses 220 of different diameters can be installed in the same wire groove 111. Those skilled in the art can set it according to actual needs.

[0061] In some implementations, such as Figure 2 As shown, the wire groove 111 is a U-shaped wire groove, and the wire groove 111 is connected to the top opening of the cover plate body 110.

[0062] Specifically, the smooth opening of the U-shaped wire groove ensures that the wire harness 220 of the battery pack 200 is subjected to uniform force on the U-shaped wire groove, preventing damage caused by uneven force on the wire harness 220 and improving its service life; it also facilitates the installation and sealing of the wire harness 220.

[0063] In some implementations, such as Figure 4 and Figure 5 As shown, a sealing element 130 is provided in the wire groove 111. The shape of the sealing element 130 is adapted to the wire groove 111 to seal the wire groove 111 after the wire harness 220 of the battery pack 200 is assembled into the wire groove 111.

[0064] Specifically, the shape of the seal 130 is adapted to the wire groove 111. For example, the seal 130 is a U-shaped sealing gasket that matches the shape of the U-shaped wire groove. The seal 130 itself has elasticity and sealing properties. When the wire harness 220 is assembled in the wire groove 111, the seal 130 plays a certain sealing role. Then, the sealing of the wire groove 111 is ensured by injecting sealant 150, so that the battery pack protection cover 100 remains sealed after the wire harness 220 is led out from the wire groove 111.

[0065] In some implementations, such as Figure 4 and Figure 5 As shown, the sealing element 130 includes a rubber sealing ring 131, and a first U-shaped groove 132 is provided on the outer side of the rubber sealing ring 131. The first U-shaped groove 132 engages with the side wall of the cover plate body 110 at the wire groove 111.

[0066] or / and,

[0067] The inner side of the rubber sealing ring 131 is provided with a second U-shaped groove 133, which is used to constrain the wiring harness 220 of the battery pack 200.

[0068] Specifically, a first U-shaped groove 132 is provided on the outer side of the rubber sealing ring 131. The first U-shaped groove 132 engages with the side wall of the cover plate body 110 at the wire groove 111, so that the rubber sealing ring 131 can be fixed in the wire groove 111. A second U-shaped groove 133 is provided on the inner side of the rubber sealing ring 131. The second U-shaped groove 133 can increase the internal space of the rubber sealing ring 131, increase the capacity of the wire harness 220 in the second U-shaped groove 133, and also facilitate the subsequent application of sealant 150, reduce the difficulty of applying sealant 150, and further improve the sealing performance of the wire groove 111 after the wire harness 220 is assembled.

[0069] In some implementations, such as Figure 4 and Figure 6 As shown, a plug plate 140 is provided in the wire groove 111. The plug plate 140 is used to plug into the wire groove 111 when the wire harness 220 of the battery pack 200 is not installed in the wire groove 111, so as to seal the wire groove 111.

[0070] Specifically, if the wire trough 111 is not used, that is, when the wire harness 220 is not passing through the wire trough 111, the insert plate 140 is inserted into the wire trough 111 to achieve a preliminary seal of the wire trough 111, and then the sealant 150 is injected to achieve a complete seal of the wire trough 111.

[0071] In some implementations, such as Figure 1 and Figure 7As shown, the support plate 121 has a first mounting hole 1210, which is used to assemble the explosion-proof valve cover plate 160.

[0072] Specifically, the top of the support plate 121 is stamped with a recessed surface, and a first mounting hole 1210 is provided on the recessed surface. The shape of the first mounting hole 1210 is adapted to the shape of the explosion-proof valve cover 160. For example, the first mounting hole 1210 can be a square first mounting hole 1210 to meet the assembly requirements of the square explosion-proof valve cover 160. The explosion-proof valve cover 160 is fixedly connected to the support plate 121, such as by welding or bonding with sealant 150. Different explosion-proof valve covers 160 have the same outer contour dimensions (compatible with M60 and below explosion-proof valves 161), and can be replaced according to experimental requirements. An explosion-proof valve 161 is fixed on the explosion-proof valve cover 160, which is an existing structure and will not be described in detail in this application.

[0073] The second aspect of this utility model is as follows: Figure 7 As shown, a battery pack 200 is provided, including: a housing 210 and a battery pack protective cover 100 as described in any embodiment of this application. A first flange 112 is provided at the bottom end of the cover body 110, and a second flange 211 is provided at the top end of the housing 210. The cover body 110 and the housing 210 are fixedly connected and cooperated through the first flange 112 and the second flange 211.

[0074] Specifically, the housing 210 houses the battery module. The housing 210 and the cover body 110 are detachably connected via matching first flange 112 and second flange 211, as well as bolts. The first flange 112 and second flange 211 are of the same size. A gasket or sealant can be placed between the first flange 112 and second flange 211 to further enhance the sealing between the housing 210 and the battery pack protective cover 100. The battery pack 200 can be a pouch battery pack 200, such as a lithium-ion pouch battery pack 200.

[0075] In this example, the battery pack 200 can achieve orderly placement of the wiring harness 220, ensuring the stable orientation of the wiring harness 220 within the cover body 110, without any squeezing or tip bending. The battery pack 200 has high overall structural strength and good sealing performance, making it particularly suitable for thermal propagation tests of soft-pack battery packs 200.

[0076] The third aspect of this utility model is as follows: Figures 8 to 10 As shown, a battery pack auxiliary installation fixture 300 is provided. The battery pack auxiliary installation fixture 300 is used to assist in the installation of the battery pack 200 described in any embodiment of this application, so that the housing 210 and the battery pack protective cover 100 are pressed together.

[0077] The battery pack auxiliary installation fixture 300 includes: a support frame 310, wherein the support frame 310 has a second mounting hole at least on its two adjacent side edges, and an adjusting rod 320 is slidably fitted in the second mounting hole. One end of the adjusting rod 320 is provided with a limit baffle 330, and the other end is provided with a locking member 340 that can be rotatably constrained on the adjusting rod 320 and moves along the axial direction of the adjusting rod 320 under its own rotation.

[0078] A clamping space is formed between the support frame 310 and the limiting baffle 330 to constrain the second flange 211 of the housing 210 and the battery pack protective cover 100. Under the rotational adjustment of the locking member 340, the support frame 310 abuts against the top of the battery pack protective cover 100, and the limiting baffle 330 abuts against the side wall of the second flange 211 away from the first flange 112.

[0079] Specifically, the shape of the support frame 310 matches the shape of the support plate 121. For example, the support frame 310 is square and can cover the top of the support plate 121. The support frame 310 has multiple second mounting holes on at least two adjacent side walls or opposite side walls. For example, the support frame 310 has second mounting holes on all four side walls. One or more second mounting holes are provided on the same side wall of the support frame 310. Each second mounting hole is fitted with an adjusting rod 320. The lower end of the adjusting rod 320 is fixedly connected to a limit baffle 330 by welding or other means. The upper end of the adjusting rod 320 passes through the second mounting hole and is fitted with a locking member 340. The locking member 340 can rotate around the adjusting rod 320 and drive the adjusting rod 320 to move along its axial direction to adjust the clamping space between the support frame 310 and the limit baffle 330.

[0080] For example, the adjusting rod 320 can be a screw, the locking element 340 can be a nut, the support frame 310 covers the top of the support plate 121, and the limiting baffle 330 is located on the side of the second flange 211 of the housing 210 away from the first flange 112. The clamping space is adjusted by rotating the nut, so that the limiting baffle 330 and the second flange 211 are in a top-stop fit, and the support plate 121 is pressed together, thereby pressing the housing 210 and the battery pack protective cover 100 together. In this example, the housing 210 and the protective cover 100 are closed by the battery pack auxiliary installation fixture 300. The close fit is firm, avoiding the problems of difficulty in closing caused by multiple wiring harnesses 220 inside the protective cover 100 and interference of wiring harnesses 220, and the protective cover 100 has good sealing performance.

[0081] In some implementations, such as Figure 10 and Figure 11As shown, a sealing gasket 350 is also provided on the side of the support frame 310 near the limiting baffle 330, and the sealing gasket 350 is conformally matched to the support frame 310.

[0082] Specifically, a sealing gasket 350 is fixedly installed at the bottom of the support frame 310. If a rubber sealing gasket 350 is used, the shape of the sealing gasket 350 is the same as that of the support frame 310. The installation of the sealing gasket 350 can reduce damage to the support plate 121 and ensure its stability, and play a role in anti-slip buffering.

[0083] In some implementations, such as Figure 9 and Figure 10 As shown, multiple adjusting rods 320 located on the same side of the support frame 310 are spaced apart, and the multiple adjusting rods 320 located on the same side of the support frame 310 share the same limiting baffle 330.

[0084] Specifically, the common limit baffle 330 can reduce the number of limit baffles 330 and facilitate the adjustment of the locking member 340, so that the limit baffles 330 on the same side of the support frame 310 are at the same horizontal height, thereby making the adjusted support frame 310 at the same horizontal height.

[0085] In some implementations, such as Figures 8 to 10 As shown, a clamping plate 360 ​​is provided inside the support frame 310, which is used to clamp and cooperate with the explosion-proof valve cover plate 160 of the battery pack 200.

[0086] Specifically, a clamping plate 360 ​​is provided inside the support frame 310. The clamping plate 360 ​​is integrally formed with the support frame 310. There are one or more clamping plates 360. For example, there are two clamping plates 360. The two clamping plates 360 are symmetrically pressed on the top of the explosion-proof valve cover 160, which further improves the clamping strength between the battery pack auxiliary installation tool 300 and the box 210 and the protective cover 100, and also improves the sealing and safety of the explosion-proof valve cover 160.

[0087] Understandably, the sealing gasket 350 at the bottom of the support frame 310 also covers the clamping plate 360 ​​to reduce damage to the explosion-proof valve cover 160.

[0088] The assembly method of the battery pack 200 provided in this application includes:

[0089] First, fix the wiring harness 220 of the battery module inside the housing 210 and clean up the wiring. Select the wire channel 111 according to the direction and position of the wiring harness 220, following the principle of proximity but without sharp corners, to prevent the wiring harness 220 from bending, which would increase resistance and heat generation, and affect the accuracy of experimental data.

[0090] The housing 210 and the cover plate body 110 are fixedly connected by a first flange 112 and a second flange 211. A sealing gasket or sealant can be installed between the first flange 112 and the second flange 211 to further improve the sealing performance between the housing 210 and the cover plate body 110.

[0091] The wire harness 220 extends through a portion of the wire groove 111 of the cover plate body 110, and electrical components are installed inside the cover plate body 110. After installation, sealant 150 is injected into the wire groove 111 where the wire harness 220 is installed to seal the corresponding wire groove 111. For the wire groove 111 where the wire harness 220 is not installed, insert the insert plate 140 first and then inject sealant 150 to seal the corresponding wire groove 111.

[0092] The explosion-proof valve 161 is fixed to the explosion-proof valve cover plate 160, and the explosion-proof valve cover plate 160 is fixed in the first mounting hole 1210 corresponding to the support plate 121 of the top plate structure 120. The top plate structure 120 is inserted into the outside of the cover plate body 110, so that the support plate 121 of the top plate structure 120 covers the top of the cover plate body 110, and the limiting guide plate 122 of the top plate structure 120 is inserted into the outside of the side wall of the cover plate body 110.

[0093] Press the support frame 310 of the battery pack auxiliary installation fixture 300 onto the top of the support plate 121, and press the limiting baffle 330 of the battery pack auxiliary installation fixture 300 against the lower end of the second flange 211 of the housing 210. Rotate the locking member 340 to move the adjusting rod 320 around its own axis, so that the limiting baffle 330 abuts against the second flange 211 and the support frame 310 abuts against the support plate 121, thereby achieving a fixed connection between the housing 210 and the protective cover 100, and completing the assembly of the battery pack 200.

[0094] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A battery pack protective cover (100), characterized in that, include: The cover body (110) has multiple wire grooves (111) on its side wall. The wire grooves (111) penetrate the side wall of the cover body (110) and extend from the top end to the bottom end of the cover body (110). The wire grooves (111) are used to lead out the wire harness (220) of the battery pack (200). The top end of the cover body (110) has an opening. The top plate structure (120) includes a support plate (121), which covers the top opening of the cover plate body (110). The bottom edge of the support plate (121) extends toward the cover plate body (110) and is provided with a limiting guide plate (122). The limiting guide plate (122) is inserted into the side wall of the cover plate body (110) and is offset from the wire groove (111).

2. The battery pack protective cover (100) according to claim 1, characterized in that, The cover plate body (110) is a square frame structure, and the wire groove (111) is opened on at least two side walls of the cover plate body (110).

3. The battery pack protective cover (100) according to claim 2, characterized in that, The wire groove (111) is formed on at least two adjacent side walls of the cover plate body (110), or the wire groove (111) is formed on two opposite side walls of the cover plate body (110), and the wire grooves (111) on the opposite side walls are arranged opposite to each other or staggered.

4. The battery pack protective cover (100) according to claim 1, characterized in that, The wire groove (111) is a U-shaped wire groove, and the wire groove (111) is connected to the top opening of the cover plate body (110).

5. The battery pack protective cover (100) according to claim 4, characterized in that, A sealing element (130) is provided in the wire groove (111), the shape of which is adapted to the wire groove (111) for sealing the wire groove (111) after the wire harness (220) of the battery pack (200) is assembled into the wire groove (111).

6. The battery pack protective cover (100) according to claim 5, characterized in that, The sealing element (130) includes a rubber sealing ring (131), and a first U-shaped groove (132) is provided on the outer side of the rubber sealing ring (131). The first U-shaped groove (132) is engaged with the cover plate body (110) at the side wall of the wire groove (111). or / and, The inner side of the rubber sealing ring (131) is provided with a second U-shaped groove (133), which is used to constrain the wiring harness (220) of the battery pack (200).

7. The battery pack protective cover (100) according to claim 1, characterized in that, The wire groove (111) is provided with a plug plate (140), which is used to plug into the wire groove (111) when the wire harness (220) of the battery pack (200) is not installed in the wire groove (111) to seal the wire groove (111).

8. The battery pack protective cover (100) according to claim 1, characterized in that, The support plate (121) has a first mounting hole (1210) for mounting an explosion-proof valve cover plate (160).

9. A battery pack (200), characterized in that, include: The housing (210) and the battery pack protective cover (100) according to any one of claims 1-8, wherein the bottom end of the cover body (110) is provided with a first flange (112) and the top end of the housing (210) is provided with a second flange (211), and the cover body (110) and the housing (210) are fixedly connected and cooperated through the first flange (112) and the second flange (211).

10. A battery pack auxiliary installation fixture (300), characterized in that, The battery pack auxiliary installation fixture (300) is used to assist in the installation of the battery pack (200) as described in claim 9, so that the housing (210) and the battery pack protective cover (100) are pressed together; The battery pack auxiliary installation fixture (300) includes: a support frame (310), the support frame (310) having a second mounting hole at least on its two adjacent side edges, an adjusting rod (320) being slidably fitted in the second mounting hole, a limit baffle (330) being provided at one end of the adjusting rod (320), and a locking member (340) being provided at the other end, which can be rotatably constrained on the adjusting rod (320) and moves along the axial direction of the adjusting rod (320) under its own rotation. A clamping space is formed between the support frame (310) and the limiting baffle (330) to constrain the second flange (211) of the housing (210) and the battery pack protective cover (100). Under the rotational adjustment of the locking member (340), the support frame (310) abuts against the top of the battery pack protective cover (100), and the limiting baffle (330) abuts against the side wall of the second flange (211) away from the first flange (112).

11. The battery pack auxiliary installation fixture (300) according to claim 10, characterized in that, A sealing gasket (350) is also provided on the side of the support frame (310) near the limiting baffle (330), and the sealing gasket (350) matches the shape of the support frame (310).

12. The battery pack auxiliary installation fixture (300) according to claim 10, characterized in that, Multiple adjusting rods (320) located on the same side of the support frame (310) are spaced apart, and the multiple adjusting rods (320) located on the same side of the support frame (310) share the same limiting baffle (330).

13. The battery pack auxiliary installation fixture (300) according to claim 10, characterized in that, The support frame (310) is provided with a pressing plate (360) inside, which is used to press and cooperate with the explosion-proof valve cover (160) of the battery pack (200).

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