Novel battery pack module and energy storage all-in-one machine

Abstract

The utility model relates to the technical field of energy storage, and discloses a novel battery pack module and an energy storage all-in-one machine, the battery pack module is installed on an energy storage box, the energy storage box is provided with a clamping part and a first fixing hole, the battery pack module comprises a module body, two sides of the module body are provided with fixing parts, and the module body is provided with a second fixing hole; the number of the installation assemblies is two, each installation assembly comprises an installation plate detachably connected with the fixing part, the installation plate is provided with an installation part extending in the direction away from the module body, and the installation part is provided with a limiting groove matched with the clamping part in a clamped mode and a second fixing hole matched with the first fixing hole in a connected mode. When the clamping part is clamped into the limiting groove, the second fixing hole and the first fixing hole are coaxial, and movement of the module body can be limited. The novel battery pack module and the energy storage all-in-one machine provided by the utility model are simple in structure, easy to install, good in heat dissipation effect and high in safety.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy storage, and specifically relates to a novel battery pack module and an integrated energy storage machine. Background Art

[0002] In existing energy storage systems, battery pack modules are usually fixed inside the energy storage box by long bolts. This installation method has many shortcomings: First, in order to adapt to the long bolts, the battery pack module will be provided with a longer mounting hole for the long bolts to pass through, which makes it difficult to align the long bolts with the fixing holes in the energy storage box when fixing, which undoubtedly increases the time cost of installation. Secondly, during the installation process, the operator needs to hold the battery pack module with one hand and continue to tighten with the other hand, which not only causes inconvenience in operation, but also fails to achieve an efficient and fast installation process. In addition, most battery pack modules in the prior art are arranged vertically, which takes up more longitudinal space. When the horizontal installation space is limited, it is difficult to arrange an effective heat dissipation structure inside the energy storage box, resulting in the heat dissipation device often having to be installed outside the energy storage box. This not only increases the complexity and cost of the system, but may also reduce the heat dissipation efficiency due to the influence of the external environment, thereby affecting the performance and service life of the entire energy storage system. Utility Model Content

[0003] The purpose of the present invention is to address the above-mentioned problems in the prior art, on the one hand, to provide a battery pack module with a simple structure and easy installation; on the other hand, to provide an energy storage integrated machine that is easy to install, has good heat dissipation effect and high safety.

[0004] The purpose of the utility model can be achieved by the following technical solutions: a new battery pack module is installed on an energy storage box, and the energy storage box has a clamping portion and a first fixing hole, and the battery pack module includes:

[0005] A module body, wherein fixing parts are provided on both sides of the module body;

[0006] The mounting assembly is provided with two groups, each group of the mounting assembly includes a mounting plate detachably connected to the fixing portion, the mounting plate is provided with a mounting portion extending in a direction away from the module body, and the mounting portion has a limiting groove that forms a snap fit with the snap-fit portion, and a second fixing hole that forms a connection with the first fixing hole. When the snap-fit portion is snapped into the limiting groove, the second fixing hole is coaxial with the first fixing hole and can limit the movement of the module body.

[0007] In the above-mentioned new battery pack module, the diameter of the limiting groove is adapted to the diameter of the clamping portion, the limiting groove is provided with an opening away from the mounting plate, and the direction of the opening is perpendicular to the direction of the module body facing the energy storage box.

[0008] In the above-mentioned new battery pack module, the mounting plate is provided with a first connecting edge extending toward the fixed portion on the side facing away from the mounting portion. The first connecting edge has two groups, which are detachably connected to the two sides of the fixed portion respectively, and the two groups of the first connecting edges and the mounting plate cooperate to form a mounting groove adapted to the size of the fixed portion.

[0009] In the above-mentioned new battery pack module, the mounting assembly also includes a supporting plate arranged perpendicular to the mounting plate, and the mounting plate is provided with a second connecting edge parallel to the first connecting edge, and the second connecting edge is detachably connected to the supporting plate.

[0010] In the above-mentioned novel battery pack module, the length of the supporting plate is adapted to the length of the module body, two groups of mounting plates are provided, and the second connecting edges of the two groups of mounting plates are detachably connected to both ends of the supporting plate.

[0011] In the above-mentioned new type of battery pack module, in the above-mentioned new type of battery pack module, two groups of electrode output terminals are provided on the module body, wherein both groups of the electrode output terminals are detachably connected with conductive connectors, and the conductive connectors extend in a direction away from the electrode output terminals, and the extension length is greater than the straight-line distance between the mounting plate and the electrode output terminals.

[0012] In the above-mentioned novel battery pack module, an insulating plate is provided on the side of the mounting plate close to the conductive joint, and the insulating plate is located between the conductive joint and the mounting plate, and isolates the conductive joint and the mounting plate.

[0013] In the above-mentioned novel battery pack module, the module body further comprises a protective member detachably provided above the electrode output terminal, the protective member is U-shaped and forms a covering on the connection between the electrode output terminal and the conductive connector.

[0014] An integrated energy storage device, comprising:

[0015] An energy storage box, comprising a shell having a receiving groove, and inner walls on both sides of the receiving groove are provided with a clamping portion and a first fixing hole;

[0016] A module body, the module body being detachably disposed horizontally in the receiving groove, having fixing portions on both sides thereof, and mounting assemblies respectively disposed on the fixing portions on both sides;

[0017] The mounting assembly includes a mounting plate detachably connected to the fixing portion, the mounting plate being provided with a mounting portion extending away from the module body, and the mounting portion having a limiting groove that forms a snap fit with the snap-fit portion, and a second fixing hole that forms a connection fit with the first fixing hole. When the snap-fit portion is snapped into the limiting groove, the second fixing hole is coaxial with the first fixing hole and can limit the movement of the module body.

[0018] In the above-mentioned integrated energy storage device, the clamping parts and the first fixing holes are respectively provided in several groups and arranged longitudinally along the accommodating groove, and the module bodies are also provided in several groups, wherein a heat insulation plate is further provided between two adjacent groups of the module bodies.

[0019] Compared with the prior art, the present invention has the following beneficial effects: by providing a fixing portion on both sides of the module body and a mounting plate detachably connected to the fixing portion, the mounting portion of the mounting plate has a limiting groove that forms a snap fit with the clamping portion, and a second fixing hole that forms a snap fit with the first fixing hole, and when the clamping portion is engaged in the limiting groove, the second fixing hole is coaxial with the first fixing hole and can limit the movement of the module body. On the one hand, the clamping fit between the limiting groove and the clamping portion enables positioning and pre-fixation of the module body during installation, not only achieving rapid positioning of the module body installation position, but also eliminating the need for operators to support the module body with their hands, freeing up the operator's hands and effectively improving the efficiency and convenience of module body installation; on the other hand, by additionally providing a detachably connected mounting plate on both sides of the module body, the bolts used to fasten the module body do not need to pass through the module body, thereby reducing the total length of the second fixing hole and the first fixing hole, allowing the operator to intuitively check the alignment of the second fixing hole with the first fixing hole, effectively improving the fastening efficiency and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural schematic diagram of a new battery pack module according to an embodiment of the present utility model.

[0021] Figure 2 This is an exploded view of a new battery pack module according to an embodiment of the present utility model.

[0022] Figure 3 This is a structural diagram of an energy storage integrated machine according to an embodiment of the present utility model.

[0023] Figure 4 This is an exploded view of an energy storage integrated machine according to an embodiment of the present utility model.

[0024] In all the drawings, the same figure marks represent the same technical features, specifically: 100, module body; 110, fixing part; 111, first mounting hole; 120, electrode output end; 200, mounting plate; 210, mounting part; 211, limiting groove; 212, second fixing hole; 220, first connecting edge; 221, second mounting hole; 230, second connecting edge; 300, supporting plate; 400, conductive connector; 410, connector; 500, insulating plate; 600, protective part; 700, shell; 710, accommodating groove; 720, mounting seat; 721, clamping part; 722, first fixing hole; 800, thermal insulation board; 900, heat dissipation device. DETAILED DESCRIPTION

[0025] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0026] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] like Figures 1 to 4 As shown, a new type of battery pack module and energy storage integrated machine includes a module body 100, a mounting plate 200, a supporting plate 300, a conductive connector 400, an insulating plate 500, a protective member 600, a shell 700, a heat insulation plate 800 and a heat dissipation device 900.

[0028] like Figures 1 to 2 As shown, a new battery pack module is installed on an energy storage box (not shown in the figure), and the energy storage box has a clamping portion 721 and a first fixing hole 722. The battery pack module includes:

[0029] The module body 100 has fixing parts 110 on both sides;

[0030] The mounting assembly is provided with two groups, each group of mounting assemblies includes a mounting plate 200 detachably connected to the fixing portion 110, the mounting plate 200 is provided with a mounting portion 210 extending in a direction away from the module body 100, and the mounting portion 210 has a limiting groove 211 that forms a snap fit with the snap-fit portion 721, and a second fixing hole 212 that forms a connection fit with the first fixing hole 722. When the snap-fit portion 721 is snapped into the limiting groove 211, the second fixing hole 212 is coaxial with the first fixing hole 722 and can limit the movement of the module body 100. On the one hand, the positioning and pre-fixation of the module body 100 during installation are achieved through the clamping cooperation between the limiting groove 211 and the clamping part 721, which not only realizes the rapid positioning of the installation position of the module body 100, but also makes the operator no longer need to support the module body 100 with his hands, freeing the operator's hands and effectively improving the efficiency and convenience of the installation of the module body 100; on the other hand, by additionally providing a detachably connected mounting plate 200 on both sides of the module body 100, the bolts used to fasten the module body 100 do not need to pass through the module body 100, thereby reducing the total length of the second fixing hole 212 and the first fixing hole 722, so that the operator can intuitively check the alignment of the second fixing hole 212 and the first fixing hole 722, effectively improving the fastening efficiency and accuracy.

[0031] Specifically, if Figure 1 、 Figure 2 As shown, in this embodiment, the module body 100 is formed by stacking a number of battery packs arranged in a line, wherein the positive and negative poles of each battery pack are on the same horizontal plane, and two sets of electrode output terminals 120 are formed at both ends of the module body 100 so that multiple battery pack modules can be connected in series for power supply.

[0032] In this embodiment, the module body 100 is provided with fixing portions 110 extending along the height direction of the module body 100 on both sides. On the one hand, the fixing portions 110 can prevent the pressing tool from directly damaging the surface of the battery pack when stacking multiple battery packs. On the other hand, they can serve as a connecting structure for installing the module body 100, thereby improving the convenience of installing the module body 100.

[0033] To improve the installation efficiency of the battery pack module, this embodiment includes two mounting assemblies. Each assembly includes a mounting plate 200 removably mounted on the fixing portion 110. The mounting plate 200 is sized to match the fixing portion 110, and one side of the mounting plate 200 is in contact with the fixing portion 110. On the other side, a mounting portion 210 is provided, extending away from the module body 100 and perpendicular to the mounting plate 200. The mounting portion 210 is further provided with a retaining groove 211 along its length, which engages with the engaging portion 721, and a second securing hole 212, which engages with the first securing hole 722. The retaining groove 211 and the engaging portion 721 engage with each other, enabling the module body 100 to be initially positioned and secured during installation. This not only allows the operator to quickly locate the installation location, but also eliminates the need for the operator to manually lift or press the module body 100 into the designated installation location, significantly improving the installation efficiency and convenience of the module body 100. In addition, by arranging the mounting plate 200 on both sides of the module body 100, when the module body 100 is installed, the operator can intuitively see the engagement between the limiting groove 211 and the engaging portion 721, as well as the alignment between the second fixing hole 212 and the first fixing hole 722, thereby effectively improving the fastening efficiency and accuracy.

[0034] Preferably, in this embodiment, two second fixing holes 212 are provided, and the limiting grooves 211 are disposed between the two second fixing holes 212 and are evenly spaced. This not only increases the number of connection points when securing the module body 100, effectively ensuring a secure connection, but also ensures balanced force on the mounting portion 210 through the evenly spaced distribution, thereby increasing the service life of the mounting portion 210.

[0035] In this embodiment, the limiting groove 211 is U-shaped, and its diameter is adapted to the diameter of the clamping portion 721. The limiting groove 211 is provided with an opening in the direction away from the mounting plate 200, and the direction of the opening is perpendicular to the direction of the module body 100 facing the energy storage box, so that the operator can intuitively see the clamping status of the limiting groove 211 and the clamping portion 721, effectively improving the convenience of installation and disassembly.

[0036] In this embodiment, the mounting plate 200 is provided with a first connecting edge 220 extending toward the fixing portion 110 on the side facing away from the mounting portion 210. Two sets of first connecting edges 220 are detachably connected to either side of the fixing portion 110. The two sets of first connecting edges 220 cooperate with the mounting plate 200 to form a mounting groove that is sized appropriately for the fixing portion 110. This not only increases the number of connection points between the mounting plate 200 and the module body 100 but also expands the contact surface between the mounting plate 200 and the module body 100, effectively ensuring the stability of the connection between the mounting plate 200 and the module body 100 while also providing protection for the module body 100.

[0037] Preferably, in this embodiment, the fixing portion 110 is provided with a first mounting hole 111 for the stud to pass through, and the first mounting hole 111 extends along the length direction of the fixing portion 110 and passes through the fixing portion 110 to communicate with the outside, and a second mounting hole 221 is provided on the first connecting edge 220. When the mounting plate 200 is affixed to the fixing portion 110, the second mounting hole 221 is coaxial with the first mounting hole 111, so that the stud passes through the second mounting hole 221 and the second mounting hole 221 in sequence, and the detachable connection between the mounting plate 200 and the fixing portion 110 is realized by cooperating with the nut.

[0038] In this embodiment, the mounting assembly further includes a support plate 300 arranged perpendicular to the mounting plate 200. A second connecting edge 230, parallel to the first connecting edge 220, is provided on the side of the mounting plate 200 near the bottom of the module body 100. The second connecting edge 230 is detachably connected to the support plate 300. This further expands the contact area between the mounting assembly and the module body 100, allowing the weight of the module body 100 to be transferred to the mounting plate 200 from multiple directions. This effectively alleviates the pressure on the connection between the first and second connecting edges 220, 230 and the fixing portion 110, ensuring the stability of the module body 100 installation and increasing the service life of the overall mounting assembly structure.

[0039] In this embodiment, the support plate 300 extends along the length direction of the module body 100, and the length of the support plate 300 after extension is adapted to the length of the module body 100, so as to support the overall structure of the module body 100, thereby preventing a single battery pack from falling off under the action of gravity during the placement of the module body 100, and further ensuring the stability of the module body 100 after installation.

[0040] In this embodiment, the mounting plates 200 are provided in two groups, which are detachably connected to the fixing portions 110 on both sides of the module body 100, and the second connecting edges 230 of the two groups of mounting plates 200 are detachably connected to the two ends of the supporting plates 300 through studs, so that the gravity after the module body 100 is installed can be evenly transmitted to the energy storage box from both sides, effectively ensuring the stability of the placement of the module body 100 and further improving the service life of the mounting components.

[0041] In order to improve the convenience of wire connection after the installation of multiple module bodies 100, in this embodiment, both sets of electrode output ends 120 are provided with detachable conductive connectors 400, and the conductive connectors 400 extend in a direction away from the electrode output end 120, and the extension length is greater than the straight-line distance between the mounting plate 200 and the electrode output end 120. Even if the extension end of the conductive connector 400 is on the side of the mounting plate 200 away from the fixed portion 110, the two adjacent module bodies 100 arranged above and below can be more conveniently connected to the wires.

[0042] Preferably, in this embodiment, one end of the conductive connector 400 is detachably connected to the electrode output end 120 via a stud, and the other end extends in a direction perpendicular to the mounting plate 200 , and the extended end has a connector 410 that is bent vertically downward.

[0043] In this embodiment, the mounting plate 200 is a metal plate. To prevent short circuits between the two conductive connectors 400 and the mounting plate 200 during connection, an insulating plate 500 is provided on the side of the mounting plate 200 near the conductive connectors 400. The insulating plate 500 is located between the conductive structure and the mounting plate 200, isolating the conductive structure from the mounting plate 200. This avoids the risk of short circuits between the conductive connectors 400 and the mounting plate 200, effectively improving the safety of the battery pack module.

[0044] In this embodiment, the module body 100 also includes a protective member 600 that is detachably arranged above the electrode output terminal 120. The protective member 600 is U-shaped and forms a covering on the connection between the electrode output terminal 120 and the conductive connector 400 to avoid short circuits caused by accidental touching of the connection, thereby further improving the safety of the battery pack module.

[0045] Preferably, in this embodiment, the protective member 600 forms a snap connection with the fixing portion 110 , and the protective member 600 is a plastic member that can achieve snap connection with the fixing portion 110 by utilizing its own elastic deformation capability.

[0046] like Figures 1 to 4As shown, an embodiment of the present invention further provides an energy storage integrated machine, which includes an energy storage box, which includes a shell 700, the shell 700 has a receiving groove 710, and the inner walls on both sides of the receiving groove 710 are provided with a longitudinally arranged clamping portion 721 and a first fixing hole 722; a module body 100, which is detachably arranged horizontally in the receiving groove 710, and has a fixing portion 110 on both sides, and an installation component is respectively provided on the fixing portions 110 on both sides. The mounting assembly includes a mounting plate 200 that is detachably connected to a fixing portion. The mounting plate 200 is provided with a mounting portion 210 extending away from the module body 100. The mounting portion 210 has a limiting groove 211 that forms a snap fit with the clamping portion 721, and a second fixing hole 212 that forms a connection with the first fixing hole 722. When the clamping portion 721 is snapped into the limiting groove 211, the second fixing hole 212 is coaxial with the first fixing hole 722 and can limit the movement of the module body 100. By horizontally arranging the module body 100 in the accommodating groove 710, the upper space within the accommodating groove 710 is effectively saved, allowing the space to be used for electrical equipment such as the heat dissipation device 900, thereby improving the safety of the energy storage device. In addition, the coordination between the limiting groove 211 and the clamping portion 721 greatly improves the assembly efficiency of the energy storage device.

[0047] Preferably, in this embodiment, the accommodating groove 710 extends along the height direction of the shell 700, and the module body 100 is arranged at the end of the shell 700 close to the ground, so that the center of gravity of the energy storage integrated machine is at the bottom, thereby ensuring the stability of the energy storage integrated machine.

[0048] In this embodiment, the inner wall of the accommodating groove 710 is provided with a mounting seat 720 vertically connected thereto, and the clamping portion 721 is cylindrical, and is arranged vertically with the first fixing hole 722 on one side of the vertical mounting plate 200 of the mounting seat 720. Preferably, a single mounting seat 720 is provided with two first fixing holes 722 corresponding one-to-one to the second fixing holes 212, which effectively ensures the reliability of the installation of the module body 100.

[0049] To facilitate the installation of multiple module bodies 100, in this embodiment, a plurality of mounting seats 720, engaging portions 721, and first fixing holes 722 are provided, arranged longitudinally along the accommodating slot 710. Furthermore, the module bodies 100 are provided in multiple groups, with a heat shield 800 positioned between two adjacent groups of module bodies 100. The provision of the heat shield 800 prevents a thermal failure in one module body 100 from affecting another, effectively improving the safety of the energy storage system.

[0050] Preferably, in this embodiment, the insulation board 800 is adapted in size to the supporting board 300 and is attached to the side of the supporting board 300 facing away from the module body 100 , and the insulation board 800 forms a detachable connection or a fixed connection with the supporting board 300 .

[0051] It is worth noting that in this embodiment, the module body 100 and the mounting assembly installed in the accommodating groove 710 are identical to the module body 100 and the mounting assembly structure of the aforementioned battery pack module, so the module body 100 and the mounting assembly and other related structures are no longer described in detail.

[0052] It should be noted that, in the present utility model, descriptions such as "first", "second", "one", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly defined. The terms "connected", "fixed", etc. should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0053] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0054] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A new type of battery pack module is installed on an energy storage box, and the energy storage box has a clamping portion and a first fixing hole, characterized in that: The battery pack module includes: A module body, wherein fixing parts are provided on both sides of the module body; The mounting assembly is provided with two groups, each group of the mounting assembly includes a mounting plate detachably connected to the fixing portion, the mounting plate is provided with a mounting portion extending in a direction away from the module body, and the mounting portion has a limiting groove that forms a snap fit with the snap-fit portion, and a second fixing hole that forms a connection with the first fixing hole. When the snap-fit portion is snapped into the limiting groove, the second fixing hole is coaxial with the first fixing hole and can limit the movement of the module body.

2. A new battery pack module according to claim 1, characterized in that: The diameter of the limiting groove is adapted to the diameter of the clamping portion. The limiting groove is provided with an opening in a direction away from the mounting plate, and the direction of the opening is perpendicular to the direction in which the module body faces the energy storage box.

3. A new battery pack module according to claim 1, characterized in that: The mounting plate is provided with a first connecting edge extending toward the fixing portion on the side facing away from the mounting portion. The first connecting edge has two groups, which are detachably connected to the two sides of the fixing portion respectively, and the two groups of the first connecting edges and the mounting plate cooperate to form a mounting groove adapted to the size of the fixing portion.

4. A new battery pack module according to claim 3, characterized in that: The mounting assembly further comprises a supporting plate arranged perpendicular to the mounting plate, a second connecting edge parallel to the first connecting edge is provided on the mounting plate, and the second connecting edge is detachably connected to the supporting plate.

5. A new battery pack module according to claim 4, characterized in that: The length of the supporting plate is adapted to the length of the module body. Two groups of mounting plates are provided, and the second connecting edges of the two groups of mounting plates are detachably connected to both ends of the supporting plate.

6. A new battery pack module according to claim 1, characterized in that: The module body is provided with two groups of electrode output terminals, wherein both groups of electrode output terminals are detachably connected to conductive connectors, which extend away from the electrode output terminals and have an extension length greater than the straight-line distance between the mounting plate and the electrode output terminals.

7. A new battery pack module according to claim 6, characterized in that: An insulating plate is provided on one side of the mounting plate close to the conductive joint, and the insulating plate is located between the conductive joint and the mounting plate, and isolates the conductive joint and the mounting plate.

8. The novel battery pack module according to claim 6, characterized in that: The module body further includes a protective member detachably arranged above the electrode output end. The protective member is U-shaped and covers the connection between the electrode output end and the conductive connector.

9. An integrated energy storage device, characterized in that: include: An energy storage box, comprising a shell having a receiving groove, and inner walls on both sides of the receiving groove are provided with a clamping portion and a first fixing hole; A module body, the module body being detachably disposed horizontally in the receiving groove, having fixing portions on both sides thereof, and mounting assemblies respectively disposed on the fixing portions on both sides; The mounting assembly includes a mounting plate detachably connected to the fixing portion, the mounting plate being provided with a mounting portion extending away from the module body, and the mounting portion having a limiting groove that forms a snap fit with the snap-fit portion, and a second fixing hole that forms a connection fit with the first fixing hole. When the snap-fit portion is snapped into the limiting groove, the second fixing hole is coaxial with the first fixing hole and can limit the movement of the module body.

10. The energy storage integrated machine according to claim 9, characterized in that: The clamping parts and the first fixing holes are respectively provided in several groups and arranged longitudinally along the accommodating groove, and the module bodies are also provided in several groups, wherein a heat insulation plate is further provided between two adjacent groups of the module bodies.

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