Battery pack installation structure and battery pack

Abstract

The present invention relates to the field of electrochemical energy storage technology, and discloses a battery pack installation structure, including a box cover, a liquid cooling plate, and multiple battery modules located on the liquid cooling plate, the box cover is connected to the liquid cooling plate, the battery module includes an end plate, the upper surface of the battery module is provided with a wire harness protection component, the wire harness protection component and the box cover enclose a passage for smoke flow through both ends along the length direction of the battery module, and also includes a support frame for supporting the internal components of the battery pack, the support frame is located between the end plate and the front end face of the box cover, the support frame is connected to the liquid cooling plate, and the support frame is provided with a smoke sensor facing the front end face of the battery module located in the middle. The present invention can improve the early warning capability, can promptly and quickly feedback abnormal conditions in the battery pack, and then can enable maintenance personnel to quickly discover abnormal conditions in the battery pack, reduce the probability of battery components melting, deformation or rupture, as well as fire and explosion in the battery pack, and reduce the occurrence of dangerous situations.

Description

Technical Field

[0001] The present invention relates to the technical field of electrochemical energy storage, and in particular to a battery pack installation structure and a battery pack. Background Art

[0002] The battery pack is used to store and provide electrical energy. The battery pack is divided into air-cooled battery pack and liquid-cooled battery pack according to the heat dissipation method. The liquid-cooled battery pack includes a liquid cooling plate, a box cover, and multiple battery modules and smoke sensors located on the liquid cooling plate. The battery module includes multiple battery cells. The battery module is connected to a protective plate with multiple pairs of limit posts. The wiring harness is installed between a pair of limit posts. The multiple pairs of limit posts limit the wiring harness. Because the battery cells in the central area of ​​the battery pack are subject to greater heat dissipation restrictions, heat is easy to accumulate, and the battery cell poles generate a large amount of heat during discharge. The temperature near the battery cell poles is high, and the battery cells in the central area of ​​the battery pack are prone to thermal runaway and smoke is easy to come out of the upper surface of the battery cells.

[0003] When the battery cell experiences thermal runaway and smoke, the smoke will spontaneously flow around and then reach the smoke sensor. When the smoke entering the smoke sensor reaches a specified concentration, the smoke sensor will sound an alarm. However, according to the above operation, the smoke sensor may not sound an alarm until a period of time has passed since the battery cell experienced thermal runaway and smoke. This will result in the abnormal situation not being quickly fed back and discovered, increasing the probability of melting, deformation or rupture of battery components, as well as larger abnormal situations such as fire and explosion that affect the normal operation of the battery system. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, one of the objects of the present invention is to provide a battery pack installation structure that can improve the early warning capability and can promptly and quickly feedback abnormal conditions in the battery pack, thereby enabling maintenance personnel to quickly discover abnormal conditions in the battery pack, reduce the probability of battery components melting, deformation or rupture, as well as fire and explosion in the battery pack, and reduce the occurrence of dangerous situations.

[0005] The technical solution adopted in the present invention is as follows: a battery pack installation structure, comprising a box cover, a liquid cooling plate, and multiple groups of battery modules located on the liquid cooling plate, the box cover is connected to the liquid cooling plate, the battery module includes an end plate, the upper surface of the battery module is provided with a wiring harness protection component, the wiring harness protection component and the box cover enclose a passage for smoke flow through both ends along the length direction of the battery module, and also includes a support frame for supporting internal components of the battery pack, the support frame is located between the end plate and the front end face of the box cover, the support frame is connected to the liquid cooling plate, and the support frame is provided with a smoke sensor facing the front end face of the battery module located in the middle.

[0006] Principle of the technical solution:

[0007] When there is smoke between the upper surface of the battery module and the box cover, the smoke is located in the passage enclosed by the wiring harness protection component and the box cover and flows along the passage. Since the passage is connected at both ends along the length of the battery module and the smoke sensor is located at one end of the passage, the smoke flows along the passage directly and quickly into the smoke sensor in large quantities. The smoke sensor quickly receives a large amount of smoke in a short time and generates an alarm, issuing an early warning to the maintenance personnel.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] 1. Since smoke flows upward, the smoke sensor is located on the support frame. Compared with the ordinary smoke sensor connected to the end face of the battery module or the smoke sensor connected to the liquid cooling plate, the position of the smoke sensor of the present invention can meet the characteristics of smoke flowing upward, which is convenient for smoke to enter more quickly. The battery module in the middle position of the battery pack is affected by its position. There are other battery modules on the adjacent sides, and the heat dissipation is relatively limited. The probability of abnormal conditions occurring is greater than that of abnormal conditions occurring in the battery module close to the box cover. The smoke sensor is located in front of the middle battery module. Installing the smoke sensor at a position with a higher probability of dangerous conditions can reduce the risk of smoke entering the battery module. The distance that smoke takes to enter the smoke sensor is shortened, which can improve the early warning capability of the smoke sensor. The harness protection components on each battery module cooperate with the box cover to form a passage that runs through both ends along the length direction of the battery module. The smoke on the upper surface of the battery module can flow in a directional manner through the passage, shortening the path of smoke flowing to the smoke sensor, and quickly and massively entering the smoke sensor, thereby improving the early warning capability of the smoke sensor, and being able to promptly and quickly feedback abnormal conditions in the battery pack, thereby enabling maintenance personnel to quickly discover abnormal conditions in the battery pack, reducing the probability of battery pack components melting, deformation or rupture, as well as fire and explosion, and reducing the occurrence of dangerous situations;

[0010] 2. The support frame of the present invention can provide support for the smoke sensor, so that the smoke sensor can be raised in the height direction, so that the smoke sensor is located at the position where the smoke flows, and the smoke quickly flows into the smoke sensor, thereby improving the early warning capability of the smoke sensor; it can avoid the smoke sensor from being connected to the battery module or the liquid cooling plate. When the smoke sensor is connected to the battery module, the position is limited and it is generally installed near the box cover. The position of the smoke sensor in the present invention can be adaptively adjusted. When connected to the liquid cooling plate, multiple connecting columns need to be welded on the liquid cooling plate, and then the smoke sensor is connected to the connecting columns, so that the liquid cooling plate needs to be connected to the battery module. The liquid cooling plate is connected by multiple connecting columns, and has to undergo multiple welding, which can easily penetrate the liquid cooling plate. With the support frame, it only needs to be connected to the liquid cooling plate. At the same time, the support frame can also support other internal components of the battery pack, such as the fuse box and the aerosol fire extinguisher. When the fuse box is connected to the liquid cooling plate, it is also necessary to first weld multiple connecting columns on the liquid cooling plate, and then connect the fuse box to the connecting columns. This can further simplify the welding steps and the number of welding times, and can also prevent the smoke sensor, fuse box, and aerosol fire extinguisher from directly contacting the liquid cooling plate and transferring heat to the liquid cooling plate, thereby improving the efficiency of the liquid cooling plate in providing heat dissipation for the battery module.

[0011] As a preferred embodiment of the present invention, a fuse box and an aerosol fire extinguisher are provided on the support frame, the smoke sensor is connected to the upper surface of the fuse box, the smoke sensor is opposite to a passage located in the middle, a battery management system and an explosion-proof pressure relief valve are provided on the box cover, and the smoke sensor is close to the battery management system and opposite to the explosion-proof pressure relief valve.

[0012] Beneficial effects: The smoke sensor is connected to the fuse box, which can further raise the position of the smoke sensor so that the smoke sensor is directly opposite to the smoke flowing out of the passage, further shortening the distance for the smoke to reach the smoke sensor and improving the early warning capability of the smoke sensor. The battery management system is connected to the wiring harness, and all wiring harnesses are finally gathered at the battery management system. Due to the large number of wiring harnesses, excessive heat is generated when the current passes through the wiring harnesses, resulting in overheating, which can easily cause a fire or thermal runaway of the battery. The smoke sensor is close to the battery management system, that is, close to the place where all wiring harnesses converge, that is, close to places where abnormal situations are prone to occur, thereby improving the early warning capability of the smoke sensor. Since the smoke gathers at the smoke sensor, the pressure at the smoke sensor will increase. At this time, the explosion-proof pressure relief valve is directly opposite to the smoke sensor, and the explosion-proof pressure relief valve can release the pressure in time, and can quickly release the gas inside the battery pack to prevent the occurrence of dangerous situations such as battery pack deformation and explosion.

[0013] As a preferred embodiment of the present invention, the support frame includes a first connecting plate and second connecting plates located at both ends and on the same side of the first connecting plate, the first connecting plate is connected to the internal components of the battery pack, and the second connecting plates are connected to the liquid cooling plate.

[0014] Beneficial effect: The first connecting plate, the two second connecting plates and the liquid cooling plate enclose a space that runs through the width of the battery pack, so that there is a distance between the first connecting plate and the liquid cooling plate, the internal components of the battery pack can be lifted away from the liquid cooling plate, and the space can also accommodate welding points.

[0015] As a preferred embodiment of the present invention, the wiring harness protection component includes a protection plate located on the upper surface of the battery module, a baffle connected to the side of the protection plate, a plurality of first through holes for exposing the lower surface of the connecting piece are arranged at intervals on both sides of the protection plate, the protection plate is provided with a plurality of first limit assemblies for limiting the left and right, front and back, and up and down positions of the connecting piece, the protection plate is provided with a plurality of second through holes for exposing the explosion-proof valve of the battery cell, the first limit assembly includes a second limit assembly located between the first through hole and the second through hole, and a second limit plate is circumferentially provided on the upper surface of the second through hole;

[0016] The second limiting assembly includes a plurality of first limiting plates and a plurality of first limiting members, wherein the first limiting members are located between adjacent first limiting plates, a gap for the wire harness to pass through is provided between the first limiting members and the first limiting plates, and the first limiting members are opposite to the second limiting plates;

[0017] The upper end of the baffle plate, the upper end of the first limit plate, the upper end of the first limit piece, and the upper end of the second limit plate are all close to the upper surface of the box cover; the protective plate, the first limit plate, the first limit piece, and the second limit plate are enclosed to limit the wiring harness to the left and right; a plurality of connecting plates and a plurality of wiring harnesses are modularly assembled through the protective plate, the first limit assembly, and the second limit plate, and are integrally installed on the battery module; the baffle plate, the box cover, the second limit assembly, and the protective plate are enclosed to form a first channel for smoke flow along both ends of the battery module; the two second limit assemblies, the box cover, and the protective plate located in the width direction of the protective plate are enclosed to form a second channel for smoke flow along both ends of the battery module.

[0018] Beneficial effect: The first limit plate, the first limit member and the second limit plate cooperate to limit the two sides of the wiring harness. At the same time, the first limit plate, the second limit member, the baffle and the box cover cooperate to form a first channel and a second channel that pass through the two ends of the battery module, so that the smoke can flow in a directional and zoned manner, ensuring that the smoke flows to the smoke sensor in a directional and rapid manner, preventing the smoke from running around and affecting the temperature increase of other components.

[0019] As a preferred embodiment of the present invention, a third limiting plate is provided on the upper end of the surface of the first limiting plate close to the second limiting plate, the protective plate and the third limiting plate are used to limit the upper and lower positions of the wiring harness, the second limiting plate is provided with a first flow channel for smoke flow along the length direction of the protective plate, the second limiting plate and the wiring harness respectively located on both sides of the second limiting plate are enclosed to form a second flow channel for smoke flow, the first flow channel, the second flow channel, the protective plate and the box cover are enclosed to form a third channel for smoke flow that runs through both ends of the battery module.

[0020] Beneficial effect: the third limiting plate limits the upper part of the wiring harness, and then the protective plate, the first limiting plate, the first limiting member, the second limiting plate and the third limiting plate cooperate to limit the upper, lower, left and right parts of the wiring harness. The first limiting plate is provided with a third limiting plate, that is, only one side between the first limiting plate and the second limiting plate is provided with the third limiting plate, and the third limiting plate and the second limiting plate are staggered, so that the length of the third limiting plate can be designed to be as long as possible to provide stable limitation for the wiring harness. At the same time, the wiring harness only needs to be wrapped around the bottom of the third limiting plate in the same direction, and the wiring harness can be quickly installed and removed, which is easy to operate; and compared with only limiting the two sides of the wiring harness, this solution can provide stable limitation for the wiring harness; the third channel can ensure the directional flow of smoke in the space enclosed by the two second limiting plates, the wiring harness, the protective plate and the box cover, and quickly enter the smoke sensor.

[0021] As a preferred embodiment of the present invention, the liquid cooling plate includes a support plate and a support frame located at both ends of the support plate and symmetrically arranged, the support frame includes a first support part and a second support part located at both ends of the support part and on the same side, the second support part is connected to the support plate, and a plurality of support blocks with three sides penetrating therein are arranged at intervals in the support frame along the length direction of the support frame, and the support blocks cooperate with hooks to lift the battery pack.

[0022] Beneficial effect: The current battery pack cover is very thin. In order to lift the battery pack and prevent the battery pack cover from deforming and the internal battery modules from contacting when lifting the battery pack, reinforcement parts are often provided on both sides of the cover. The reinforcement parts and the side surfaces of the cover enclose a rectangular space, and then lifting holes are opened on the reinforcement parts. However, this will increase the overall width of the battery pack, increase the material consumption, and increase the production process and cost. In order to lift the battery pack, the present invention does not need to provide reinforcement parts and open lifting holes on both sides of the cover. The designed support frame and support block can not only provide support for the cover, but also lift the battery pack by grabbing the support block. When the battery pack is installed on the battery rack, the gap between the left and right adjacent battery packs can be increased to reduce heat transfer and improve the heat dissipation efficiency of the battery pack.

[0023] As a preferred embodiment of the present invention, the second support portion is provided with a plurality of connecting cylinders, the box cover is provided with a plurality of clamping columns that can be inserted into the connecting cylinders, the connecting cylinders are partially located in the support block, and two adjacent connecting cylinders cooperate to limit the support block.

[0024] Beneficial effect: The connecting tube can not only cooperate with the clamping column to connect the liquid cooling plate and the box cover together, but also limit the support block, eliminating the need to weld the support block and saving installation time.

[0025] As a preferred embodiment of the present invention, a connection block is provided at one end of the support frame located at the front end of the battery pack, a bolt is provided between the connection block and the battery cluster frame, and the bolt is located below the connection tube and abuts against the connection tube.

[0026] Beneficial effect: The connecting tube can limit the bolts and strengthen the connection between the connecting block and the battery cluster frame.

[0027] A second object of the present invention is to provide a battery pack, comprising the battery pack installation structure described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the battery pack of the present invention;

[0029] Figure 2 It is a structural schematic diagram of a part of the battery pack installation structure of the present invention;

[0030] Figure 3 It is a schematic diagram of a partial structure of the battery pack installation structure of the present invention from another angle;

[0031] Figure 4 This is a schematic diagram of a partial structure of the battery pack installation structure of the present invention from another angle;

[0032] Figure 5 It is a schematic diagram of the structure of the liquid cooling plate and the support block of the present invention;

[0033] Figure 6 It is an exploded view of the liquid cooling plate and the support block of the present invention;

[0034] Figure 7 It is a schematic diagram of the structure at position G of the present invention;

[0035] Figure 8 It is a structural schematic diagram of the multifunctional wire harness protection component of the present invention;

[0036] Fig. 9 It is a schematic diagram of the structure at position A of the present invention;

[0037] Fig.10 It is a schematic diagram of the structure of the multifunctional wire harness protection component and the connecting piece of the present invention;

[0038] Fig.11 It is a schematic diagram of the structure at position B of the present invention;

[0039] Fig.12 It is a structural schematic diagram of the multifunctional wire harness protection component and the connecting piece of the present invention from another angle;

[0040] Fig.13 It is a schematic diagram of the structure at position C of the present invention;

[0041] Fig.14 It is a structural schematic diagram of the multifunctional wire harness protection component and the connecting piece of the present invention from another angle;

[0042] Fig.15 It is a schematic diagram of the structure at position D of the present invention;

[0043] Fig.16 It is an exploded view of the multifunctional wire harness protection component, the connecting piece, the wire harness and the collecting piece of the present invention;

[0044] Fig.17 It is a schematic diagram of the structure at position E of the present invention;

[0045] Fig.18 It is a schematic diagram of the structure at position F of the present invention;

[0046] Fig.19 It is an exploded view of the battery module, the multifunctional wiring harness protection component, the connecting piece, the wiring harness and the collection piece of the present invention;

[0047] Fig. 20 It is a schematic diagram of the structure of a part of the battery pack of the present invention. DETAILED DESCRIPTION

[0048] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially used for illustration purposes rather than for limiting the present invention.

[0049] In the description of the present application, the terms "first", "second", "one side", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the structure referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present application.

[0050] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0051] Reference numerals include:

[0052] Protective plate 1-1, first through hole 1-2, second limiting assembly 1-3, first limiting plate 1-301, first limiting member 1-302, limiting sheet 1-3021, first connecting portion 1-30211, second connecting portion 1-30212, fourth limiting plate 1-3022, second through hole 1-4, second limiting plate 1-5, third limiting plate 1-6, second limiting member 1-7, third connecting portion 1-701, fourth connecting portion 1-702, supporting column 1-8, baffle 1-9, groove 1-10, connecting sheet 1-11, first notch 1-1101, second notch 1-1102, third through hole 1-1103, collecting sheet 1-12, main body 1-1201, clamping member 1-1202, fifth connecting portion 1-12021, sixth connecting portion 1-12022, seventh connecting portion 1-12023;

[0053] Box cover 2-1, liquid cooling plate 2-2, support plate 2-201, support frame 2-202, first support part 2-2021, second support part 2-2022, support block 2-203, battery module 2-3, end plate 2-4, wiring harness protection component 2-5, support frame 2-6, first connecting plate 2-601, second connecting plate 2-602, smoke sensor 2-7, fuse box 2-8, aerosol fire extinguisher 2-9, battery management system 2-10, explosion-proof pressure relief valve 2-11.

[0054] Explanation: The smoke mentioned in the present invention may also be some combustible or combustion-supporting gas, such as hydrogen or oxygen.

[0055] Example 1

[0056] like Figure 1-20 As shown, the battery pack installation structure, such as Figure 1 , Figure 2 and Fig.19 As shown, it includes a box cover 2-1, a liquid cooling plate 2-2, a plurality of battery modules 2-3 located on the liquid cooling plate 2-2, and a support frame 2-6 for supporting the internal components of the battery pack. The box cover 2-1 is connected to the liquid cooling plate 2-2. The box cover 2-1 includes a rectangular first connection cover, and a second connection cover connected to the side of the first connection cover and on the same side. Each second connection cover is connected to a strip edge. In this embodiment, as shown in FIG. Figure 1 and Figure 3 As shown, a battery management system 2-10 and an explosion-proof pressure relief valve 2-11 are provided on the second connection cover located on the front side.

[0057] like Figure 5 As shown, the liquid cooling plate 2-2 includes a support plate 2-201 and support frames 2-202 symmetrically arranged at both ends of the support plate 2-201. Figure 6 and Figure 7As shown, the support frame 2-202 includes a first support part 2-2021, a second support part 2-2022 located at both ends and on the same side of the first support part 2-2021, the second support part 2-2022 located at the bottom is connected to the support plate 2-201, and a plurality of support blocks 2-203 with three sides penetrated are arranged at intervals along the length direction of the support frame 2-202 inside the support frame 2-202. The support block 2-203 cooperates with the hook to lift the battery pack. In this embodiment, the outer side surface, front side surface and rear side surface of the support block 2-203 are all penetrated, and the strip edge is threadedly connected to the second support part 2-2022.

[0058] In this embodiment, the support frame 2-202 can be a channel steel, and a plurality of connecting tubes are provided on the lower surface of the second support portion 2-2022 located at the top, and a plurality of clamping columns that can be inserted into the connecting tubes are provided on the box cover 2-1. The connecting tube part is located in the support block 2-203, and two adjacent connecting tubes cooperate to limit the support block 2-203. A connecting block is provided at one end of the support frame 2-202 located at the front end of the battery pack, and a bolt is provided between the connecting block and the battery cluster frame (for placing the battery pack), and the bolt is located below the connecting tube and abuts against the connecting tube.

[0059] like Fig.19 As shown, the battery module 2-3 includes a cell assembly and end plates 2-4 located at both ends of the cell assembly. The cell assembly includes a plurality of cells, such as Figure 8 As shown, the upper surface of the battery module 2-3 is provided with a harness protection component 2-5, and the harness protection component 2-5 and the box cover 2-1 are enclosed to form a passage for smoke flow through both ends along the length direction of the battery module 2-3. In this embodiment, as shown in FIG. Figure 8-11 As shown, the wiring harness protection component 2-5 includes a protection plate 1-1 located on the upper surface of the battery module 2-3, the lower surface of the protection plate 1-1 is in contact with the upper surface of the battery module, the connecting piece 1-11 is located on the protection plate 1-1, and baffles 1-9 are provided on both sides of the left and right sides of the protection plate 1-1. A plurality of first through holes 1-2 for exposing the lower surface of the connecting piece 1-11 are provided at intervals along the length direction of the protection plate 1-1 on both sides of the protection plate 1-1, and the protection plate 1-1 is provided with a plurality of second through holes 1-4 for exposing the explosion-proof valve of the battery cell, and the second through holes 1-4 are located The two first through holes 1-2 are spaced apart and along the length direction of the protective plate 1-1, and a second limiting plate 1-5 is circumferentially provided on the upper surface of the second through hole 1-4. A plurality of pairs of support columns 1-8 are spaced apart and distributed along the length direction of the protective plate 1-1 and abut against the side of the connecting piece 1-11 between the side edge of the protective plate 1-1 and the first through hole 1-2. The height of the baffle 1-9 is equal to the height of the support column 1-8. The protective plate 1-1 is provided with a plurality of first limiting components located on both sides of the first through hole 1-2 for limiting the connecting piece 1-11 leftwards and rightwards, frontwards and backwards, and up and down.

[0060] In this embodiment, Fig. 9As shown, the second limiting plate 1-5 is symmetrically provided with a third notch, and the second limiting plate 1-5 and the third notch cooperate to enclose a first flow channel for smoke flow along the length direction of the protective plate 1-1, and the first limiting assembly and the second limiting plate 1-5 cooperate to limit the wiring harness left and right and up and down, and the second limiting plate 1-5 and the wiring harnesses respectively located on both sides of the second limiting plate 1-5 enclose a second flow channel for smoke flow, and the protective plate 1-1 is connected to the battery module through a connecting plate 1-11, and a plurality of connecting plates and a plurality of wiring harnesses are modularly assembled through the protective plate 1-1, the first limiting assembly, and the second limiting plate 1-5, and are installed as a whole on the battery module, and the first flow channel, the second flow channel and the battery pack cover enclose a channel directly opposite to the smoke sensor.

[0061] In this embodiment, when the battery cell explosion-proof valve is opened, high-temperature gas and electrolyte will be released. The wiring harness will contact with the battery cell explosion-proof valve or be located above the battery cell explosion-proof valve, which may easily cause damage to the outer skin of the wiring harness, degradation of insulation performance, deformation of the wiring harness or cause a short circuit. The two second limiting plates 1-5 of the present invention cooperate with each other, which can not only limit the wiring harness to prevent the wiring harness from contacting the battery cell explosion-proof valve, but also cooperate with the battery pack body to form a channel for high-temperature gas to pass through, guide the gas, and prevent the high-temperature gas from running around and causing other components to be in a high-temperature environment.

[0062] In this embodiment, the support column 1-8 is provided with a threaded hole, and the support column 1-8 is threadedly connected with a cover plate which is parallel to and equal in size to the protective plate 1-1. The cover plate can provide protection for the connecting plate 1-11 and the wiring harness. The cover plate, the protective plate 1-1, and the baffle 1-9 can also be enclosed to form a passage for smoke flow that passes through both ends along the length direction of the protective plate 1-1.

[0063] like Fig. 9As shown, the first limiting component includes a second limiting component 1-3 located between the first through hole 1-2 and the second through hole 1-4, and a plurality of second limiting members 1-7 located on one side of the first through hole 1-2. The second limiting component 1-3 includes a plurality of first limiting plates 1-301 and a plurality of first limiting members 1-302 spaced apart along the length direction of the protective plate 1-1. In this embodiment, one connecting piece 1-11 corresponds to two first limiting plates 1-301 and two first limiting members 1-302. The first limiting member 1-302 is located between adjacent first limiting plates 1-301. The first limiting member 1-302 and the first limiting plate A gap is provided between 1-301 for the wiring harness to pass through, the first limit piece 1-302 is opposite to the second limit plate 1-5, the upper end of the first limit plate 1-301 is located above the limit plate 1-3021, the second limit piece 1-7 and the connecting plate 1-11, the first limit plate 1-301 abuts against the side of the connecting plate 1-11, and the third limit plate 1-6 is provided on the upper end of the surface of the first limit plate 1-301 close to the second limit plate 1-5. The protective plate 1-1, the first limit plate 1-301, the first limit piece 1-302, the second limit plate 1-5 and the third limit plate 1-6 are enclosed to limit the wiring harness left and right and up and down.

[0064] like Fig. 9 and Fig.11 As shown, in this embodiment, the protective plate 1-1 is located below the wiring harness, the first limiting plate 1-301, the first limiting member 1-302 and the second limiting plate 1-5 are respectively located on both sides of the wiring harness, and the third limiting plate 1-6 is located above the wiring harness. The protective plate 1-1, the first limiting plate 1-301, the first limiting member 1-302 and the second limiting plate 1-5 limit the wiring harness to the left and right, and the protective plate 1-1 and the third limiting plate 1-6 limit the wiring harness to the upper and lower positions.

[0065] like Fig. 9As shown, the first limiting member 1-302 includes an elastic limiting piece 1-3021, two fourth limiting plates 1-3022 respectively located on both sides of the limiting piece 1-3021, the limiting piece 1-3021 includes a first connecting portion 1-30211 and a second connecting portion 1-30212, the first connecting portion 1-30211 is connected to the protective plate 1-1 and has elasticity, the second connecting portion 1-30212 is connected to the upper end of the first connecting portion 1-30211, there is a gap between the fourth limiting plate 1-3022 and the limiting piece 1-3021, the fourth limiting plate 1-3022 is abutted against the side of the connecting piece 1-11, in this embodiment, one connecting piece 1-11 corresponds to two second limiting members 1 -7, the second limiting member 1-7 is opposite to the limiting plate 1-3021, the second limiting member 1-7 includes a third connecting part 1-701 and a fourth connecting part 1-702, the third connecting part 1-701 is connected to the protective plate 1-1, the fourth connecting part 1-702 is connected to the upper end of the third connecting part 1-701, when the third connecting part 1-701 abuts against the side of the connecting plate 1-11, the first connecting part 1-30211 abuts against the side of the connecting plate 1-11, the second connecting part 1-30212 and the fourth connecting part 1-702 both abut against the upper surface of the connecting plate 1-11, the limiting plate 1-3021 and the second limiting member 1-7 cooperate to limit the connecting plate 1-11 left and right, front and back, up and down.

[0066] In this embodiment, the upper surface of the support column 1-8 can abut against the inner surface of the box cover, a pair of support columns 1-8 are located between two adjacent second limiting members 1-7, the height of the support column 1-8 is greater than or equal to the height of the first limiting plate 1-301, the height of the first limiting plate 1-301 is greater than or equal to the height of the first limiting member 1-302, the inner side surface of the baffle 1-9 abuts against the third connecting part 1-701 on the second limiting member 1-7, the outer edge of the support column 1-8, and the connecting plate 1-11, and the baffle 1-9 and the first limiting plate 1-301 cooperate to limit the connecting plate 1-11 left and right.

[0067] In this embodiment, the protective plate 1-1 provides support for the second limiting member 1-7. The protective plate 1-1, the first through hole 1-2, the limiting plate 1-3021 and the second limiting member 1-7 cooperate to provide support and limit the connecting piece 1-11, and expose the portion where the connecting piece 1-11 is connected to the battery cell pole. At the same time, all the connecting pieces 1-11 on a battery module 2-3 are limited so that all the connecting pieces 1-11 on a battery module 2-3 can be connected to the corresponding battery cell poles at the same time, reducing the number of connecting pieces 1-11 connected one by one. The operating steps of connecting the battery cell poles. At the same time, since the connecting piece 1-11 is located on the protective plate 1-1, the lower surface of the connecting piece 1-11 is connected to the battery cell pole. When the connecting piece 1-11 is connected to the battery cell pole, the protective plate 1-1 is limited between the connecting piece 1-11 and the upper surface of the battery cell. The position of the protective plate 1-1 is fixed, that is, the protective plate 1-1 is stably installed on the battery module 2-3, which can save the operating steps of separately installing the protective plate 1-1, improve the installation efficiency, and enhance the mutual connection of the battery cells on the battery module 2-3.

[0068] In this embodiment, the first limiting plate 1-301 is a plate with a rectangular longitudinal section, the second through hole 1-4 is an elliptical cross section, and the major axis is arranged along the length direction of the protective plate 1-1, the second limiting plate 1-5 is an arc-shaped plate, and the third limiting plate 1-6 is a long strip plate.

[0069] The upper end of the baffle 1-9, the upper end of the first limiting plate 1-301, the upper end of the first limiting member 1-302, and the upper end of the second limiting plate 1-5 are all close to the upper surface of the box cover 2-1. The baffle 1-9, the box cover 2-1, the second limiting assembly 1-3 and the protective plate 1-1 are enclosed as a first channel for smoke flow along the two ends of the battery module 2-3. The two second limiting assemblies 1-3, the box cover 2-1 and the protective plate 1-1 are enclosed as a second channel for smoke flow along the two ends of the battery module 2-3. The two second limiting plates 1-5, the protective plate 1-1, the wiring harness and the box cover 2-1 are enclosed as a third channel for smoke flow along the two ends of the battery module 2-3.

[0070] In this embodiment, due to the provision of the wiring harness protection component 2-5, the space enclosed by the upper surface of each battery module 2-3 and the box cover 2-1 is independent of the space enclosed by the upper surface of the adjacent battery module 2-3 and the box cover 2-1, which can prevent smoke from running around and prevent the smoke from the abnormal battery module 2-3 from flowing to other battery modules 2-3, thereby affecting the operation of other battery modules 2-3.

[0071] like Fig.12 and Fig.13As shown, the portion of the lower surface of the protective plate 1-1 located between the two first limit plates 1-301 in the width direction of the protective plate 1-1 is symmetrically provided with a plurality of grooves 1-10 spaced apart along the length direction of the protective plate 1-1, and the grooves 1-10 are located directly below the wiring harness.

[0072] like Figure 2-3 As shown, the support frame 2-6 is located between the end plate 2-4 and the front end surface of the box cover 2-1. Figure 3 and Figure 4 As shown, the support frame 2-6 includes a first connecting plate 2-601 and a second connecting plate 2-602 located at both ends and on the same side of the first connecting plate 2-601. The first connecting plate 2-601 is connected to the internal components of the battery pack, and the second connecting plates 2-602 are connected to the liquid cooling plate 2-2.

[0073] like Figure 4 As shown, the support frame 2-6 is provided with a smoke sensor 2-7, a fuse box 2-8, and an aerosol fire extinguisher 2-9 which are directly opposite to the front end surface of the battery module 2-3 located in the middle. The smoke sensor 2-7 is connected to the upper surface of the fuse box 2-8, and the smoke sensor 2-7 is directly opposite to a passage located in the middle. Figure 3 As shown, the smoke sensor 2-7 is close to the battery management system 2-10 and is facing the explosion-proof pressure relief valve 2-11.

[0074] In this embodiment, Figure 4 As shown, the smoke sensor 2-7 is connected to a mounting plate, which includes a first mounting portion, and second mounting portions located at both ends and on the same side of the first mounting portion, wherein one of the second mounting portions is connected to the upper surface of the fuse box.

[0075] like Figure 1-20 As shown, the battery pack includes the above battery pack installation structure, a connecting piece 1-11 for connecting the battery cells in series, and a collecting piece 1-12 for collecting the temperature and voltage of the battery cells, as shown in FIG. Fig.11 As shown, the two sides of the connecting piece 1-11 are respectively in contact with the baffle 1-9 and the second limiting component 1-3. Fig.17 As shown, the two side surfaces of the connecting piece 1-11 are respectively abutted against the baffle 1-9, the first limiting member 1-302, the first limiting plate 1-301, and the second limiting member 1-7, and the connecting piece 1-11 is provided with a first notch 1-1101 for accommodating the second limiting member 1-7 and a second notch 1-1102 for accommodating a pair of support columns 1-8. In this embodiment, when the third connecting portion 1-701 is located in the first notch 1-1101 and abuts against the side of the connecting piece 1-11, the first connecting portion 1-30211 abuts against the side of the connecting piece 1-11, and the second connecting portion 1-30212 and the fourth connecting portion 1-702 both abut against the upper surface of the connecting piece 1-11.

[0076] like Figure 14-15As shown, the connecting plate 1-11 is symmetrically provided with a third through hole 1-1103, and the third through hole 1-1103 is directly opposite to the gap between the first limiting plate 1-301 and the fourth limiting plate 1-3022, as shown in FIG. Figure 16-18 As shown, the collection piece 1-12 includes a main body 1-1201 and a snap-in component 1-1202. The snap-in component 1-1202 can be snap-connected with the third through hole 1-1103. The snap-in component 1-1202 includes a fifth connecting portion 1-12021, a sixth connecting portion 1-12022 and a seventh connecting portion 1-12023 located at both ends of the fifth connecting portion 1-12021 and on the same side. The fifth connecting portion 1-12021 is parallel to the main body 1-1201, the sixth connecting portion 1-12022 is connected to the main body 1-1201, and the sixth connecting portion 1-12022 and the seventh connecting portion 1-12023 are both in contact with the side wall of the third through hole 1-1103.

[0077] In this embodiment, there are two groups of battery modules arranged in parallel in the battery pack, each group includes multiple battery modules, and the design of only having the third limiting plate 1-6 on one side can make the space between the first limiting plate 1-301 and the second limiting plate 1-5 large enough to accommodate multiple wiring harnesses and effectively limit the multiple wiring harnesses.

[0078] Specific installation steps of the harness protection component 2-5 onto the battery module 2-3, and the path planning of the smoke flow:

[0079] One side of the connecting piece 1-11 abuts against the baffle 1-9, the third connecting part 1-701 on the second limiting piece 1-7 is located in the first notch 1-1101 on the connecting piece 1-11, and abuts against the side wall of the first notch 1-1101, and a pair of support columns 1-8 are located in the second notch 1-1102. Hold the second connecting part 1-30212 on the limiting piece 1-3021, and rotate vertically with the connection between the first connecting part 1-30211 and the protective plate 1-1 as the fulcrum to expose the upper surface of the protective plate 1-1, press the connecting piece 1-11 downward, and allow the connecting piece 1-11 to fall onto the protective plate 1-1, and make The lower surface of the connecting piece 1-11 is fitted with the upper surface of the protective plate 1-1, and the side of the connecting piece 1-11 is abutted against the first limiting plate 1-301 and the fourth limiting plate 1-3022. The fourth connecting part 1-702 on the second limiting member 1-7 is abutted against the upper surface of the connecting piece 1-11, releasing the second connecting part 1-30212. The first connecting part 1-30211 is elastic, and under the action of elastic force, it drives the second connecting part 1-30212 back to the initial position and abuts against the upper surface of the connecting piece 1-11. According to the above steps, all the connecting pieces 1-11 on a battery module are connected to the protective plate 1-1;

[0080] Then install the wiring harness on a battery module in the space enclosed by the protective plate 1-1, the second limiting assembly 1-3, the second limiting plate 1-5 and the third limiting plate 1-6. Specifically, due to the setting of the third limiting plate 1-6, the space for placing the wiring harness is large enough, and the wiring harness corresponding to the connecting piece 1-11 at the rear end is close to the second limiting plate 1-5. The wiring harness is placed from right to left and from bottom to top to ensure that the wiring harness is stably limited and opposite to the outer surface of the bottom of the groove 1-10. One end of the wiring harness connected to the collection piece 1-12 passes through the first limiting plate 1-301 The gap between the fourth limiting plate 1-3022 and the collecting piece 1-12 connected to the wiring harness is then installed on the corresponding connecting piece 1-11, and each connecting piece 1-11 is snap-fitted with the corresponding collecting piece 1-12. Specifically, the snap-in piece 1-1202 on the collecting piece 1-12 extends into the third through hole 1-1103, and the sixth connecting part 1-12022 and the seventh connecting part 1-12023 on the snap-in piece 1-1202 abut against the side wall of the third through hole 1-1103, thereby realizing the modular assembly of the connecting piece 1-11 and the wiring harness on a battery module.

[0081] The cell poles are opposite to the first via holes 1-2, and all the connecting pieces 1-11 are aligned with the corresponding cell poles through the first via holes 1-2 at the same time. The connecting pieces 1-11 are welded to the cell poles on the corresponding battery modules. Since the protective plate 1-1 is located between the connecting pieces 1-11 and the upper surface of the battery module at this time, the protective plate 1-1 is automatically connected to the battery module indirectly, eliminating the step of installing the protective plate 1-1 on the battery module and the setting of related components;

[0082] When smoke or gas flows on the upper surface of the battery module 2-3, the smoke or gas flows directionally along the first channel enclosed by the baffle 1-9, the box cover 2-1, the second limit assembly 1-3 and the protective plate 1-1, the second channel enclosed by the two second limit assemblies 1-3, the box cover 2-1 and the protective plate 1-1, and the third channel enclosed by the two second limit plates 1-5, the protective plate 1-1, the wiring harness and the box cover 2-1, and enters the smoke sensor 2-7 quickly and in large quantities, triggering the early warning function of the smoke sensor 2-7 and quickly feeding back abnormal conditions in the battery pack.

[0083] Example 2

[0084] This embodiment is basically the same as the embodiment 1, except that the second limiting assembly 1-3 includes a plurality of first limiting plates 1-301 and a first limiting member 1-302, the first limiting member 1-302 includes a limiting plate 1-3021 and two fourth limiting plates 1-3022, the first limiting plate 1-301 and the first limiting member 1-302 are both elastic, and the specific operation when the connecting plate 1-11 and the wiring harness are installed on the protective plate 1-1 is to place the wiring harness on a battery module 2-3 on the protective plate 1-1, the second limiting assembly 1-3, and the second limiting plate 1- 5 and the third limiting plate 1-6, one side of the connecting piece 1-11 abuts against the baffle 1-9, the third connecting portion 1-701 on the second limiting member 1-7 is located in the first notch 1-1101 on the connecting piece 1-11, and abuts against the side wall of the first notch 1-1101, a pair of support columns 1-8 are located in the second notch 1-1102, the second limiting component 1-3 is moved, the second limiting component 1-3 is rotated vertically, exposing the upper surface of the protective plate 1-1, at this time, the connecting piece 1-11 is inclined with the upper surface of the protective plate 1-1, and the left side of the connecting piece 1-11 is abutted against the support column 1-8 contacts with the third connecting part 1-701, and the right side of the connecting piece 1-11 abuts against the second limiting component 1-3, so that the second limiting component 1-3 bends and is located above the wiring harness, limiting the upper part of the wiring harness, and then the collection piece 1-12 connected to the wiring harness is connected to the connecting piece 1-11, and when the collection piece 1-12 is clamped with the third through hole 1-1103 on the connecting piece 1-11, the force of pressing the collection piece 1-12 drives the corresponding connecting piece 1-11 to move downward and fit with the upper surface of the protective plate 1-1, and the second limiting component 1-3 returns to the initial position under the action of elastic force, When all the collecting pieces 1-12 are sequentially engaged with the connecting pieces 1-11, all the connecting pieces 1-11 are also moved downward accordingly, so that when the collecting pieces 1-12 are connected to the connecting pieces 1-11, the connecting pieces 1-11 fall to the corresponding positions, thereby reducing the number of operation steps. In this process, the upper part of the wiring harness is limited by the second limiting component 1-3 to prevent the collecting pieces 1-12 on the rear wiring harness from being pulled by the front wiring harness after being connected to the connecting piece 1-11, thereby causing the position of the wiring harness to change during assembly, thereby ensuring that the wiring harness is always limited during assembly.

[0085] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A battery pack installation structure, comprising a box cover, a liquid cooling plate, and a plurality of battery modules located on the liquid cooling plate, wherein the box cover is connected to the liquid cooling plate, and the battery module comprises an end plate, characterized in that: The upper surface of the battery module is provided with a harness protection component, and the harness protection component and the box cover enclose a passage for smoke flow through both ends along the length direction of the battery module, and also includes a support frame for supporting internal components of the battery pack, the support frame is located between the end plate and the front end surface of the box cover, the support frame is connected to the liquid cooling plate, and the support frame is provided with a smoke sensor facing the front end surface of the battery module located in the middle; The harness protection component includes a protection plate located on the upper surface of the battery module, a baffle connected to the side of the protection plate, a plurality of first through holes for exposing the lower surface of the connecting piece are arranged at intervals on both sides of the protection plate, the protection plate is provided with a plurality of first limit assemblies for limiting the left and right, front and back, and up and down positions of the connecting piece, the protection plate is provided with a plurality of second through holes for exposing the explosion-proof valve of the battery cell, the first limit assembly includes a second limit assembly located between the first through hole and the second through hole, and a second limit plate is circumferentially arranged on the upper surface of the second through hole; The second limiting assembly includes a plurality of first limiting plates and a plurality of first limiting members, wherein the first limiting members are located between adjacent first limiting plates, a gap for the wire harness to pass through is provided between the first limiting members and the first limiting plates, and the first limiting members are opposite to the second limiting plates; The upper end of the baffle plate, the upper end of the first limit plate, the upper end of the first limit piece, and the upper end of the second limit plate are all close to the upper surface of the box cover; the protective plate, the first limit plate, the first limit piece, and the second limit plate are enclosed to limit the wiring harness to the left and right; a plurality of connecting plates and a plurality of wiring harnesses are modularly assembled through the protective plate, the first limit assembly, and the second limit plate, and are integrally installed on the battery module; the baffle plate, the box cover, the second limit assembly, and the protective plate are enclosed to form a first channel for smoke flow along both ends of the battery module; the two second limit assemblies, the box cover, and the protective plate located in the width direction of the protective plate are enclosed to form a second channel for smoke flow along both ends of the battery module.

2. The battery pack installation structure according to claim 1, characterized in that: The support frame is provided with a fuse box and an aerosol fire extinguisher, the smoke sensor is connected to the upper surface of the fuse box, the smoke sensor is directly opposite to a passage located in the middle, the box cover is provided with a battery management system and an explosion-proof pressure relief valve, the smoke sensor is close to the battery management system and directly opposite to the explosion-proof pressure relief valve.

3. The battery pack installation structure according to claim 1, characterized in that: The support frame includes a first connecting plate and second connecting plates located at both ends and on the same side of the first connecting plate, the first connecting plate is connected to internal components of the battery pack, and the second connecting plates are connected to the liquid cooling plate.

4. The battery pack installation structure according to claim 1, characterized in that: A third limiting plate is provided on the upper end of the surface of the first limiting plate close to the second limiting plate, and the protective plate and the third limiting plate are used to limit the upper and lower positions of the wiring harness, and the second limiting plate is provided with a first flow channel for smoke flow along the length direction of the protective plate, and the second limiting plate and the wiring harness respectively located on both sides of the second limiting plate are enclosed to form a second flow channel for smoke flow, and the first flow channel, the second flow channel, the protective plate and the box cover are enclosed to form a third channel for smoke flow that runs through both ends of the battery module.

5. The battery pack installation structure according to claim 1, characterized in that: The liquid cooling plate includes a support plate and a support frame symmetrically arranged at both ends of the support plate, the support frame includes a first support portion and a second support portion located at both ends and on the same side of the support portion, the second support portion is connected to the support plate, and a plurality of support blocks with three sides penetrated are arranged at intervals in the support frame along the length direction of the support frame, and the support blocks cooperate with hooks to lift the battery pack.

6. The battery pack installation structure according to claim 5, characterized in that: The second support portion is provided with a plurality of connecting tubes, the box cover is provided with a plurality of clamping columns which can be clamped into the connecting tubes, the connecting tube part is located in the support block, and two adjacent connecting tubes cooperate to limit the support block.

7. The battery pack installation structure according to claim 6, characterized in that: A connecting block is provided at one end of the support frame located at the front end of the battery pack, a bolt is provided between the connecting block and the battery cluster frame, and the bolt is located below the connecting cylinder and abuts against the connecting cylinder.

8. A battery pack, characterized in that: It includes the battery pack installation structure described in any one of claims 1-7.

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