WO2021184759A1

WO2021184759A1 - Battery housing having multilayered heat-dissipating structure

Info

Publication number: WO2021184759A1
Application number: PCT/CN2020/123674
Authority: WO
Inventors: 申望屏; 王克田
Original assignee: 深圳市雄韬锂电有限公司
Priority date: 2020-03-20
Filing date: 2020-10-26
Publication date: 2021-09-23
Also published as: CN111370614A

Abstract

The present invention relates to a battery housing having a multilayered structure and relates to the technical field of batteries. The battery housing comprises a housing body and a housing cover. The housing body and the housing cover are sealedly connected to form an accommodating cavity. Stepped fixing plates are provided symmetrically on both the front and rear sides of the accommodating cavity. At least two layers or multiple layers of module support frames are provided within the accommodating cavity. The module support frames comprise a bottom plate and partitions. Battery module units are provided between the partitions. Gaps are provided between both the left and right sides of the bottom plate and the housing body. Running downwards, starting from the second layer, one side of each layer of the module support frames is provided as a step, a first heat-dissipating component is provided at the stepped side of the module support frame provided at the bottommost layer; and, a second heat-dissipating component is provided at the stepped side of one layer or multiple layers of the module support frames provided at the middle. The battery housing of the present invention has high space utilization rate, excellent heat-dissipation effect, and broad application prospects.

Description

Battery box with multilayer heat dissipation structure

Technical field

The invention belongs to the technical field of batteries, and in particular relates to a battery box with a multilayer heat dissipation structure. The battery box has a multi-layer heat dissipation structure, high space utilization, and good heat dissipation effect.

Background technique

In the face of increasingly stringent exhaust emission standards in China and the world today and the future energy crisis, pure electric vehicles have become one of the areas where major auto manufacturers are actively researching and developing. For different types of electric vehicles, the space for placing batteries inside is different. In order to make full use of the internal space of electric vehicles, the battery box has been developed towards modularization. At present, all battery boxes with a waterproof rating of IP67 or higher adopt an internal circulation heat dissipation structure.

Since the battery box is fully sealed assembly, the fan in the box mainly relies on the internal air circulation to use the heat transfer of the box, dissipating the heat to the surrounding air, and the batteries near the four walls of the box can use sheet metal parts to transfer heat to the box The wall is scattered into the surrounding air, but the battery in the center of the box is difficult to fully dissipate due to space and other factors. Therefore, most of the battery boxes on the market that reach the IP67 waterproof level or higher have certain problems in heat dissipation.

Summary of the invention

The object of the present invention is to provide a battery box with a multilayer heat dissipation structure. The battery box has a multi-layer heat dissipation structure, high space utilization, and good heat dissipation effect.

In order to achieve the above objectives, the present invention is achieved through the following technical solutions:

A battery box with a multi-layer heat dissipation structure, comprising a box body and a box cover that is arranged at the top of the box body and can be used for heat dissipation; the box body and the box cover are sealed and connected to form an accommodating cavity; the accommodating cavity Stepped fixing plates are symmetrically arranged on the front and rear sides; a plurality of support platforms are arranged on one side of the stepped fixing plate close to the accommodating cavity;

At least two layers of module brackets are also arranged in the containing cavity; wherein, the module bracket includes a bottom plate arranged horizontally and a plurality of partition plates arranged vertically on the bottom plate; the partition plate is provided with A plurality of first ventilation openings for air flow; battery module units are arranged between the partition plates; gaps are arranged between the left and right sides of the bottom plate and the box body, and the front and back sides of the bottom plate The sides are respectively connected to the front and rear support platforms located on the same horizontal plane; in this way, the module bracket provided with the battery module unit can be received and fixed;

From top to bottom, starting from the second layer, one side of the module brackets of each layer is arranged in a stepped shape; from top to bottom, the module brackets arranged at the bottom layer are arranged on one side of the stepped shape There is a first heat dissipating component; the module bracket arranged in the middle layer is provided with a second heat dissipating component on the stepped side.

Further, the first heat dissipation assembly includes a first mounting seat and a first turbofan arranged on the first mounting seat; the second heat dissipation assembly includes a second mounting seat and a first turbofan arranged on the second mounting seat On the second turbofan.

The first turbo fan and the second turbo fan blow the hot air at the battery module unit of the layer up to the cover for cooling. The hot air of the uppermost battery module unit flows to the cover for cooling based on the principle of upward flow of hot air. , Due to the principle of pressure and air flow, cold air flows from top to bottom, and the cold air at the cover flows from the gap between the bottom plate and the box wall to the battery module units on each layer to dissipate the battery modules. Then, it becomes hot air and is blown out by the first turbo fan and the second turbo fan to the cover of the box for cooling, so as to realize the circulating heat dissipation inside the battery box.

Further, the first mounting base includes a first positioning plate arranged horizontally, a second positioning plate extending vertically downward from one end of the first positioning plate, and a screw fixed to the first positioning plate One end of the first fixing plate is fixed to the first positioning plate, and the other end extends horizontally away from the first positioning plate; the second positioning plate and the The bottom surface of the box body is connected; the second positioning plate is provided with a clamping position for fixing the air cavity of the first turbofan, and the other end of the first fixing plate is provided with a fixing position for fixing the first turbofan A first square notch of the first air outlet passage, the first square notch is in interference fit with the first air outlet passage. Through the interference fit of the first square notch and the first air outlet channel, the first turbo fan is further fixed, which can prevent the first turbo fan from shaking during the working process, and avoid generating abnormal noise or noise.

Further, the second mounting seat includes a second fixing plate vertically arranged on the bottom plate, and a third positioning plate extending horizontally from one end of the second fixing plate in a direction close to the battery module unit. Plate; the second fixing plate is provided with a plurality of studs on a side close to the battery module unit, and a plurality of the studs are arranged in a triangle shape; the third positioning plate is provided with a method for fixing the second A second square notch of the second air outlet passage of the turbofan, the second square notch is in interference fit with the second air outlet passage.

Further, a plurality of first through holes matching the studs are provided on the outside of the air cavity of the second turbofan, and the air cavity and the plurality of first through holes are integrally formed.

Further, a bead is provided between the battery module units; the bead includes a concave bead and a plate-shaped bead connected to both sides of the concave bead, and the concave bead and the plate-shaped bead are integrally formed The concave bead is fixed on the upper side of the partition plate by screws; the plate bead is arranged on the battery module unit on both sides of the partition plate. After tightening the screws, the plate-shaped bead provides downward pressure to the battery module unit to fix the battery module unit on the module bracket. The concave bead is arranged so that the head of the screw is not higher than the battery module unit , Will not affect the stability of the multilayer structure.

Further, the battery module unit includes a plurality of battery cells arranged in parallel, an upper sheath arranged on the upper side of the battery core, a lower sheath arranged on the lower side of the battery core, and a battery for holding and fixing A plurality of fixed-frame boxes of the battery cores; the fixed-frame boxes are set without a top cover, and are provided with a plurality of second ventilation openings for air flow on both sides.

Further, the upper sheath includes a cover provided on the upper side of the battery core, a first trapezoidal groove provided on one end of one side of the cover, and another one provided on one side of the cover. A first trapezoidal protrusion at one end, a second trapezoidal protrusion provided at one end of the other opposite side of the cover, and a second trapezoidal groove provided at the other end of the other opposite side of the cover, the The first trapezoidal groove and the second trapezoidal protrusion are oppositely arranged and adapted, and the first trapezoidal protrusion and the second trapezoidal groove are oppositely arranged and adapted. By adapting the first trapezoidal groove to the second trapezoidal protrusion and the first trapezoidal protrusion and the second trapezoidal groove, a plurality of electric cores are connected side by side.

Further, the lower sheath includes a box body for receiving and fixing the battery core, a third trapezoidal bump arranged on one end of one side of the box body, and a box body arranged on one side of the box body. The third trapezoidal groove at the other end, the fourth trapezoidal groove provided at one end of the other opposite side of the box body, and the fourth trapezoidal protrusion provided at the other end of the other opposite side of the box body, the The third trapezoidal groove is adapted to the fourth trapezoidal protrusion, and the third trapezoidal protrusion is adapted to the fourth trapezoidal groove. Through the third trapezoidal groove, the fourth trapezoidal bump is adapted, and the third trapezoidal bump is adapted to the fourth trapezoidal groove, a plurality of electric cores are connected side by side; both sides of the box body A plurality of rectangular bumps are also symmetrically arranged, and when the adjacent box bodies are connected side by side, the rectangular bumps are connected to each other to enhance structural stability.

A plurality of lower sheaths are connected side by side and placed on the bottom of the fixed frame box. The battery core is placed on the lower sheath, and the upper sheath is covered on the upper side of the battery core to form a battery module unit. The connection between the upper and lower sheaths allows a certain gap between the cells, which is conducive to the flow of air and provides space for the battery to expand due to heat.

Further, the box cover is an aluminum alloy box cover, which has a good heat dissipation effect.

Further, an inspection port is provided on one side of the box body close to the stepped shape, which facilitates the maintenance of the battery module unit and the first and second turbofans.

The technical solution proposed by the present invention has the following beneficial effects:

The present application adopts a multi-layer stacked arrangement structure, so that the battery module units are arranged in the battery box in a layered manner, which can make full use of the effective space in the battery box, and the space utilization rate is high. In addition, this application adopts a multi-layer heat dissipation structure to promote the heat dissipation inside the box: from top to bottom, starting from the second layer, one side of the module bracket of each layer is arranged in a stepped manner; from top to bottom, it is arranged at the bottom. The module support at the bottom layer is provided with a first heat dissipation component on the stepped side; the module support provided on the middle layer is provided with a second heat dissipation component on the stepped side, so that the battery The internal circulation method can be used to dissipate the heat inside the box, which can quickly reduce the temperature inside the battery box, thereby effectively improving the overall performance and service life of the battery, thereby ensuring the consistency of battery capacity and improving the safety of battery use.

Description of the drawings

FIG. 1 is an exploded view of the structure of a battery box with a multi-layer heat dissipation structure according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a first heat dissipation component and a second heat dissipation component of the battery box of FIG. 1;

FIG. 3 is a schematic diagram of the structure of the module bracket and the bead of the battery box of FIG. 1; FIG.

4 is an exploded view of the structure of the battery module unit of the battery box of FIG. 1;

Figure 5 is an enlarged view of Figure 4 at A;

Fig. 6 is an enlarged view of Fig. 4 at B.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

It should be noted that if there are directional indications (such as up, down, left, right, front, back, top, bottom...) involved in the embodiment of the present invention, the directional indication is only used to explain that it is in a specific posture ( As shown in the figure), the relative positional relationship and movement conditions of the components under the following, if the specific posture changes, the directional indication will also change accordingly.

In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , Or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, it can be the internal connection of two components or the interaction relationship between two components, unless otherwise specified The limit. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in this application can be understood according to specific circumstances.

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or a central element may also be present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or an intermediate element may be present at the same time.

In addition, if there are descriptions related to "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and cannot be understood as instructions or implications. Its relative importance or implicitly indicates the number of technical features indicated. Therefore, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on what can be achieved by a person of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that such a combination of technical solutions does not exist. , Is not within the protection scope of the present invention.

In the present application, at least two layers of module supports are arranged in the containing cavity, and a plurality of battery module units are arranged on the module supports. The arrangement of the multi-layer battery module units makes the box body in a certain space. It has a higher battery capacity, which improves the use of space and the performance of the battery.

In addition, the battery module unit of the present application is provided with a bead, and the bead includes a concave bead and a plate-shaped bead. The module unit is fixed on the module support, and the concave bead makes the head of the screw not higher than the battery module unit, which will not affect the stability of the multilayer structure.

The battery module unit of the present application fixes a plurality of electric cores connected side by side by upper and lower sheaths through a fixed frame box. The arrangement of the upper and lower sheaths of the electric cores allows a certain gap between the electric cores, which is beneficial to The air flows and provides space for the battery to expand due to heat.

As shown in FIG. 1, an embodiment of the present invention provides a battery box with a multi-layer heat dissipation structure, including a box body 10 and a box cover 20 arranged on the top of the box body and used for heat dissipation; the box body 10 and The box cover 20 is hermetically connected to form an accommodating cavity 30;

Stepped fixing plates 31 are symmetrically provided on both sides of the accommodating cavity; a plurality of support platforms 311 are provided on one side of the stepped fixing plate close to the accommodating cavity;

In this embodiment, a three-layer module bracket 40 is provided in the containing cavity 30, wherein the module bracket 40 includes a bottom plate 41 arranged horizontally and a plurality of partition plates 42 arranged vertically on the bottom plate 41. The partition plate 42 is provided with a plurality of first ventilation openings 421 for air flow; the partition plate 42 is provided with battery module units 50; the left and right sides of the bottom plate 41 and the A gap is provided between the boxes, and the front and rear sides of the bottom plate 41 are respectively connected to the front and rear support platforms 311 located on the same horizontal plane to receive and fix the module bracket 40 provided with the battery module unit 50 From top to bottom, starting from the second layer, one side of each layer of the module bracket 40 is arranged in a stepped shape; from top to bottom, the module bracket 40 is arranged at the bottom of the stepped shape One side is provided with a first heat dissipation component 60; the module bracket 40 provided on the middle layer is provided with a second heat dissipation component 70 on the stepped side.

It can be understood that in other embodiments, according to actual needs, two layers, or four layers, or five or more layers of the module support 40 may also be provided in the containing cavity 30.

As shown in FIG. 2, the first heat dissipation assembly 60 includes a first mounting seat 61 and a first turbofan 62 disposed on the first mounting seat 61; the second heat dissipation assembly 70 includes a second mounting seat 71 And a second turbofan 72 arranged on the second mounting seat 71.

One or more first heat dissipation components 60 and second heat dissipation components 70 can be provided according to actual needs; specifically, in this embodiment, there are two first heat dissipation components 60 and two second heat dissipation components 70. .

The present invention uses the first turbo fan 62 and the second turbo fan 72 to blow the hot air at the battery module unit 50 of the layer upward to the cover 20 for cooling, and the hot air in the uppermost battery module unit 50 flows upward based on the hot air. The principle of self-flow to the box cover 20 for cooling, due to the principle of pressure and air flow, the cold air flows from top to bottom, the cold air at the box cover 20 flows from the gap between the bottom plate 41 and the box wall to each layer At the battery module unit 50, the battery module is dissipated and then turned into hot air, which is then blown out by the first turbo fan 62 and the second turbo fan 72 to the cover 20 for cooling, thereby realizing circulating heat dissipation inside the battery box .

Further, the first mounting seat 61 includes a first positioning plate 611 arranged horizontally, a second positioning plate 612 extending vertically downward from one end of the first positioning plate, and a second positioning plate 612 arranged at the first positioning plate. The first fixing plate 613 on the plate 611; one end of the first fixing plate 613 is fixed to the first positioning plate 611, and the other end extends horizontally in a direction away from the first positioning plate 611; The second positioning plate 612 is connected to the bottom surface of the box body 10; the second positioning plate 612 is provided with a locking position 6121 for fixing the first turbofan 62, and the other end of the first fixing plate 613 is provided with a useful For fixing the first square notch (not marked in the figure) of the first air outlet passage 621 of the first turbofan 62, the first square notch is in interference fit with the first air outlet passage 621. Through the interference fit between the first square notch and the first air outlet channel 621, the first turbo fan 62 is further fixed, which can prevent the first turbo fan 62 from shaking during operation and avoid abnormal noise or noise.

Further, the second mounting seat 71 includes a second fixing plate 711 vertically arranged on the bottom plate 41, and horizontally extending from one end of the second fixing plate 711 in a direction close to the battery module unit 50 A third positioning plate 712 is provided; the second fixing plate 711 is provided with a plurality of studs (not marked in the figure) on a side close to the battery module unit 50, and the plurality of studs are arranged in a triangle shape; The third positioning plate 712 is provided with a second square notch (not marked in the figure) for fixing the second air outlet channel 721 of the second turbofan 72, and the second square notch is connected to the second air outlet. Channel 721 interference fit.

Further, a plurality of through holes 722 matching the studs are provided on the outside of the air cavity of the second turbofan 72, and the plurality of through holes are integrally formed with the second turbofan 72.

Further, as shown in FIG. 3, a bead 80 is provided between the battery module units 50; the bead 80 includes a concave bead 81 and a plate-shaped bead 82 connected to both sides of the concave bead 81, the concave The shaped bead 81 is integrally formed with the plate-shaped bead 82; the concave bead 81 is arranged on the upper side of the partition plate 42 and is fixedly connected to the partition plate 42 by screws 90; the plate-shaped bead 82 The battery module unit 50 is arranged on both sides of the partition plate 42. After tightening the screw 90, the plate-shaped bead 82 provides downward pressure to the battery module unit 50 to fix the battery module unit 50 on the module bracket 40. The concave bead 81 is arranged so that the head of the screw 90 Not higher than the battery module unit 50, and will not affect the stability of the multilayer structure.

As shown in Figs. 4-6, the battery module unit 50 includes a plurality of battery cells 51 arranged in parallel, an upper sheath 52 arranged on the upper side of the battery core 51, and a lower side of the battery cell 51. A lower sheath 53 and a fixed frame box 54 for holding and fixing a plurality of the batteries 51;

Further, the upper sheath 52 includes a cover body 521 arranged on the upper side of the battery core 51, a first trapezoidal groove 522 arranged on one end of one side of the cover body 521, and a first trapezoidal groove 522 arranged on the cover body. The first trapezoidal bump 523 at the other end of one side of the 521, the second trapezoidal bump 524 provided at one end of the other opposite side of the cover 521, and the second trapezoidal bump 524 provided at the other opposite side of the cover 521 The second trapezoidal groove 525 at the other end, the first trapezoidal groove 522 and the second trapezoidal protrusion 524 are oppositely arranged and adapted, the first trapezoidal protrusion 523 and the second trapezoidal groove 525 are oppositely arranged and adaptation. By adapting the first trapezoidal groove 522 and the second trapezoidal protrusion 524, and the first trapezoidal protrusion 523 and the second trapezoidal groove 525, the multiple cells 51 are connected side by side.

Further, the lower sheath 53 includes a box body 531 for receiving and fixing the battery core 51, a third trapezoidal protrusion 532 arranged at one end of one side of the box body 531, and a third trapezoidal protrusion 532 arranged on the box body 531. The third trapezoidal groove 533 at the other end of one side of the body 531, the fourth trapezoidal groove 534 provided at one end of the other opposite side of the box body 531, and another trapezoidal groove 534 provided on the other opposite side of the box body 531 A fourth trapezoidal protrusion 535 at one end, the third trapezoidal groove 533 is adapted to the fourth trapezoidal protrusion 535, and the third trapezoidal protrusion 532 is adapted to the fourth trapezoidal groove 534. The third trapezoidal groove 533 is adapted to the fourth trapezoidal protrusion 535, and the third trapezoidal protrusion 532 is adapted to the fourth trapezoidal groove 534 to connect a plurality of electric cores 51 side by side; A plurality of rectangular bumps 536 are symmetrically provided on both sides of the box body 531. When the adjacent box bodies 531 are connected side by side, the rectangular bumps 536 are connected to each other to enhance structural stability.

Further, the fixed frame box 54 is provided without a top cover, and a plurality of second ventilation openings 541 for air flow are provided on both sides.

A plurality of lower sheaths 53 are connected side by side and placed at the bottom of the fixed frame box 54. The battery cell 51 is placed on the lower sheath 53, and a sheath 52 is covered on the upper side of the battery cell 51 to form a battery module unit 50. . The connection between the upper sheath 52 and the lower sheath 53 allows a certain gap between the battery cores 51 to facilitate the flow of air and provide a space for the battery to expand due to heat.

Further, the box cover 20 is an aluminum alloy box cover, which has a good heat dissipation effect.

Furthermore, the box body 10 is provided with an inspection port 11 on a side surface close to the stepped shape, which facilitates the maintenance of the battery module unit 50 and the first turbo fan 62 and the second turbo fan 72.

The battery box of the present application can adopt an internal circulation method for heat dissipation, which can quickly reduce the temperature inside the battery box, thereby effectively improving the overall performance and service life of the battery, thereby ensuring battery capacity consistency and improving battery safety. The preparation cost of this application is low, the processability is good, economical and practical, the structure is simple, and the installation is convenient.

The above descriptions are only the preferred embodiments of the present invention, and do not limit the scope of the present invention. Under the inventive concept of the present invention, equivalent structural transformations made by using the contents of the description and drawings of the present invention, or direct/indirect use Other related technical fields are included in the scope of patent protection of the present invention.

Claims

A battery box with a multi-layer heat dissipation structure, which is characterized in that it comprises a box body and a box cover arranged at the top of the box body and used for heat dissipation; the box body and the box cover are hermetically connected to form an accommodating cavity; Stepped fixing plates are symmetrically provided on the front and rear sides of the accommodating cavity; a plurality of support platforms are provided on one side of the stepped fixing plate close to the accommodating cavity;

At least two layers of module brackets are also arranged in the containing cavity; wherein, the module bracket includes a bottom plate arranged horizontally and a plurality of partition plates arranged vertically on the bottom plate; the partition plate is provided with A plurality of first ventilation openings for air flow; battery module units are arranged between the partition plates; gaps are arranged between the left and right sides of the bottom plate and the box body, and the front and back sides of the bottom plate The sides are respectively connected to the support platforms arranged in the front and rear and located on the same horizontal plane;

From top to bottom, starting from the second layer, one side of the module brackets of each layer is arranged in a stepped shape; from top to bottom, the module brackets arranged at the bottom layer are arranged on one side of the stepped shape There is a first heat dissipating component; the module bracket arranged in the middle layer is provided with a second heat dissipating component on the stepped side.
The battery box with a multi-layer heat dissipation structure according to claim 1, wherein the first heat dissipation assembly includes a first mounting seat and a first turbofan disposed on the first mounting seat; The two heat dissipation components include a second mounting seat and a second turbo fan arranged on the second mounting seat.
The battery box with a multi-layer heat dissipation structure according to claim 2, wherein the first mounting seat comprises a first positioning plate arranged horizontally and vertically extending downward from one end of the first positioning plate The second positioning plate and the first fixing plate fixed to the first positioning plate by screws; one end of the first fixing plate is fixed to the first positioning plate, and the other end is away from the first positioning plate The direction of the positioning plate extends horizontally; the second positioning plate is connected to the bottom surface of the box; the second positioning plate is provided with a clamping position, and the other end of the first fixing plate is provided with a first square A gap, the first square gap and the first air outlet channel are interference fit.
The battery box with a multi-layer heat dissipation structure according to claim 2, wherein the second mounting seat comprises a second fixing plate vertically arranged on the bottom plate, and a second fixing plate from one end of the second fixing plate. A third positioning plate extending horizontally in a direction close to the battery module unit; a plurality of studs are provided on a side of the second fixing plate close to the battery module unit, and the plurality of studs are triangular The third positioning plate is provided with a second square notch, and the second square notch is in an interference fit with the second air outlet channel; the second turbofan is provided with a plurality of The first through hole matched with the stud, the air cavity and the plurality of first through holes are integrally formed.
The battery box with a multi-layer heat dissipation structure according to claim 1, wherein a bead is arranged between the battery module units; the bead includes a concave bead and a bead connected to both sides of the concave bead The plate-shaped bead, the concave bead and the plate-shaped bead are integrally formed; the concave bead is fixed on the upper side of the partition plate by screws; the plate-shaped bead is arranged on both sides of the partition plate The battery module unit.
The battery box with a multilayer heat dissipation structure according to claim 1, wherein the battery module unit comprises a plurality of battery cells arranged in parallel, an upper sheath arranged on the upper side of the battery core, and The lower sheath and the fixed frame box on the lower side of the battery cell; the fixed frame box is set without a top cover, and two sides are provided with a plurality of second ventilation openings for air flow.
The battery box with a multi-layer heat dissipation structure according to claim 6, wherein the upper sheath comprises a cover provided on the upper side of the battery core, and an end provided on one side of the cover The first trapezoidal groove, the first trapezoidal protrusion provided on the other end of one side of the cover, the second trapezoidal protrusion provided on the end of the other opposite side of the cover, and the second trapezoidal protrusion provided on the cover The second trapezoidal groove at the other end of the other opposite side of the body, the first trapezoidal groove and the second trapezoidal protrusion are disposed oppositely and adapted to each other, and the first trapezoidal protrusion is opposite to the second trapezoidal groove Set up and adapt.
The battery box with a multi-layer heat dissipation structure according to claim 6, wherein the lower sheath comprises a box body for receiving and fixing the battery core, and an end arranged on one side of the box body The third trapezoidal protrusion, the third trapezoidal groove provided at the other end of one side of the box body, the fourth trapezoidal groove provided at one end of the other opposite side of the box body, and the box body The fourth trapezoidal protrusion at the other end of the other opposite side, the third trapezoidal groove is adapted to the fourth trapezoidal protrusion, and the third trapezoidal protrusion is adapted to the fourth trapezoidal groove .
The battery box with a multi-layer heat dissipation structure according to claim 1, wherein the box cover is an aluminum alloy box cover.
The battery box with a multi-layer heat dissipation structure according to claim 1, wherein a maintenance port is provided on one side of the box body close to the stepped shape.