Integrally cast battery module shell assembly

Abstract

The invention discloses an integrally cast battery module shell assembly, which relates to the technical field of power batteries, and comprises a shell main body, a chassis protection plate, a cross beam, a liquid cooling plate and a heat conduction liquid circulation cavity. According to the battery module disclosed by the invention, the shell main body, the chassis protection plate and the liquid cooling plate are arranged, the shell main body, the chassis protection plate and the liquid cooling plate form the shell assembly of the battery module, and the shell main body, the chassis protection plate and the liquid cooling plate are all processed in an integral casting forming manner and are assembled after being respectively processed; compared with a profile welding manufacturing mode in the traditional technology, the shell main body, the chassis protection plate and the liquid cooling plate which are integrally cast are higher in structural strength after being assembled, the anti-impact performance of the shell main body can be guaranteed through the integral casting mode, the heat dissipation effect on the battery after the chassis protection plate and the liquid cooling plate are assembled cannot be affected, and the service life of the battery is prolonged. Therefore, the stability of the battery in the use process can be effectively ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of power batteries, and in particular to an integrally cast battery module housing assembly. Background Art

[0002] With the rapid development of new energy vehicles and renewable energy storage, the requirements for battery safety, stability and energy density are getting higher and higher. As an important protective component of the battery pack, the battery box is responsible for fixing the battery module, protecting against external impact, heat dissipation, waterproofing and dustproofing. Traditional battery boxes are generally manufactured by welding and splicing profiles. This method has insufficient structural strength, low heat dissipation efficiency, poor sealing performance, and heavy weight. These problems have limited the improvement of the overall performance of the battery system and its wide application to a certain extent. For example, a power battery pack module shell structure with announcement number CN116706394A includes a protective mechanism, a shell sealing mechanism movably installed in the protective mechanism, and a tightening mechanism movably installed on the shell sealing mechanism. The buckle plate is plugged into the outer side of the main pad and the auxiliary pad in the overlapped state. At this time, the first push rod and the second push rod movably installed on the buckle plate will cooperate with the main clamping column and the auxiliary clamping column and the two gaskets to initially clamp the first clamp frame, the second clamp frame and the main pad and the auxiliary pad in the overlapped state. When the gasket is hit with a hammer, the first push rod and the second push rod will drive the main clamping column and the auxiliary clamping column to extend outward until the two gaskets movably installed on the outside of the main clamping column and the auxiliary clamping column tighten and fix the first clamp frame and the second clamp frame, thereby improving the device to quickly package and fix the assembled battery pack, and facilitating the subsequent operator to open the cover for maintenance of the internal battery.

[0003] The above technical solution has the problems of insufficient structural strength and limited heat dissipation efficiency in practical applications.

[0004] Therefore, it is necessary to invent an integrally cast battery module housing assembly to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide an integrally cast battery module housing assembly to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: an integrally cast battery module housing assembly, comprising: A housing body, which is arranged in a square structure and has an inner cavity for accommodating a battery; A chassis guard plate is disposed below the shell body and seals the inner cavity of the shell body; A crossbeam is arranged inside the shell body and flush with the bottom end of the shell body, and the crossbeam is arranged as a partially hollowed-out structure; The liquid cooling plate installation groove is provided on the upper surface of the chassis guard plate and has an area smaller than that of the housing main body; The liquid cooling plate is located inside the liquid cooling plate installation groove and fits against the bottom end of the housing main body; The heat-conducting liquid circulation cavity is provided at the bottom of the liquid cooling plate installation groove. The liquid cooling plate installation groove and the liquid cooling plate limit the circulation path of the heat-conducting liquid inside the heat-conducting liquid circulation cavity, and the heat-conducting liquid circulation cavity is arranged in an "E" shape.

[0007] Preferably, the first groove is provided in the middle of the lower surface of the chassis guard plate; The second grooves are multiple and are all provided at the bottom of the first groove; The third groove is located at the bottom of the second groove and is arranged in a "匚" shape; The heat dissipation fins are multiple and are all located at the bottom of the third groove, and the top ends of the heat dissipation fins extend into the inside of the heat-conducting liquid circulation cavity; The first groove, the second groove and the third groove form a stepped structure to protect the heat dissipation fins.

[0008] Preferably, the heat-conducting plates and the heat-conducting fins. The heat-conducting plates are multiple and are all located on the lower surface of the liquid cooling plate. The multiple heat-conducting plates are respectively arranged in a staggered manner with the multiple third grooves. The heat-conducting fins are multiple and are all located on the lower surface of the heat-conducting plates. The heat-conducting fins and the heat dissipation fins are both arranged in a horizontal structure, and the heat-conducting fins and the heat dissipation fins are arranged in a staggered manner. The heat-conducting liquid in the heat-conducting liquid circulation cavity can flow through the heat-conducting fins and the heat dissipation fins in sequence to achieve heat exchange.

[0009] Preferably, the accommodating grooves are multiple and are all located at the bottom of the heat-conducting liquid circulation cavity. The multiple accommodating grooves respectively correspond to the positions of multiple groups of heat-conducting plates, and both the accommodating grooves and the heat-conducting plates are arranged in a "中" shape. The accommodating grooves and the heat-conducting plates can temporarily store the heat-conducting liquid to provide a heat exchange medium between the heat-conducting fins and the heat dissipation fins.

[0010] Preferably, the diversion groove is located at the end of the heat-conducting liquid circulation cavity; The liquid cooling pipe joint is located in the middle of the outside of the housing main body and is communicated with the inside of the diversion groove. The liquid cooling pipe joint is used to connect the heat-conducting liquid in the heat-conducting liquid circulation cavity to the cooling pipeline.

[0011] Preferably, the installation bolts are located in the middle of the cross beam. The middle of the bottom end of the chassis guard plate is provided with an installation groove corresponding to the installation bolts. The middle of the liquid cooling plate is provided with a sealing sleeve corresponding to the installation bolts. The installation bolts, the installation groove and the sealing sleeve limit the positions among the housing main body, the chassis guard plate and the liquid cooling plate.

[0012] Preferably, the positioning holes and the positioning pins are arranged at the four corners of the bottom of the liquid cooling plate installation groove, and the positioning pins are arranged at the four corners of the lower surface of the liquid cooling plate, and the positioning holes and the positioning pins limit the position of the liquid cooling plate in the liquid cooling plate installation groove.

[0013] Preferably, a frame-shaped reinforcement rib is located at the bottom end of the inner side wall of the shell body and is flush with the lower surface of the shell body, and the frame-shaped reinforcement rib is used to improve the structural strength and horizontal compression resistance of the shell body; There are multiple longitudinal reinforcing ribs, all of which are located between the frame-shaped reinforcing ribs and the inner wall of the shell body. The longitudinal reinforcing ribs are used to improve the connection strength between the frame-shaped reinforcing ribs and the shell body.

[0014] Preferably, the energy absorbing block is located at the inner bottom end of the shell body and is flush with the lower surface of the shell body. A plurality of strip-shaped deformation grooves are provided in the middle of the energy absorbing block. The energy absorbing block can collapse and deform along the deformation grooves to absorb the impact force on the shell body. There are multiple tension reinforcement ribs, all of which are located on the outer side wall of the shell body. The tension reinforcement ribs are used to improve the connection strength between the chassis guard plate and the shell body, so as to improve the load-bearing performance of the chassis guard plate on the batteries inside the shell body, and the tension reinforcement ribs can form a protective barrier on the outside of the shell body.

[0015] Preferably, the shell body, chassis guard plate and liquid cooling plate are all produced and processed by integral casting.

[0016] Technical effects and advantages of the present invention: 1. The present invention provides a shell body, a chassis guard plate and a liquid cooling plate, which form a shell assembly of a battery module. The shell body, the chassis guard plate and the liquid cooling plate are all processed by an integrated casting method and assembled after being processed separately. Compared with the method of manufacturing by profile welding in the traditional technology, the integrally cast shell body, the chassis guard plate and the liquid cooling plate have higher structural strength after assembly. The integral casting method can ensure the anti-impact performance of the shell body, and will not affect the heat dissipation effect of the chassis guard plate and the liquid cooling plate on the battery after assembly, thereby effectively ensuring the stability of the battery during use; 2. The present invention provides a first groove, a second groove and a third groove of a stepped structure on the lower surface of the chassis guard plate, and a heat dissipation fin is provided inside the third groove. The stepped structure design can maximize the protection of the heat dissipation fins. A heat transfer liquid circulation chamber is provided between the chassis guard plate and the liquid cooling plate, and the heat transfer liquid circulation chamber is used to limit the circulation path of the heat transfer liquid. Heat transfer fins are provided on the lower surface of the liquid cooling plate. The heat transfer fins cooperate with the heat transfer fins to directly remove the heat in the heat transfer liquid, so as to achieve the effect of assisting the heat dissipation of the battery. A plurality of receiving grooves are provided inside the heat transfer liquid circulation chamber. The heat transfer liquid can be temporarily stored in the receiving grooves to ensure the heat exchange effect between the heat transfer fins and the heat dissipation fins. Compared with the method of leading the heat transfer liquid to the heat dissipation mechanism in the traditional technical solution, the present technical solution can effectively improve the heat dissipation effect of the power battery. 3. The present invention sets a crossbeam inside the shell body, and the crossbeam is set as a hollow structure. The crossbeam can divide the inside of the shell body into two spaces to improve the deformation resistance of the shell body when it is impacted by the outside. Frame-shaped reinforcement ribs are set at the bottom end of the shell body, and the frame-shaped reinforcement ribs can strengthen the internal structure of the shell body. Energy-absorbing blocks are set inside the shell body, and the energy-absorbing blocks can reduce the deformation of the shell body on the side close to the battery by means of collapse deformation, so as to protect the battery during collision deformation. The energy-absorbing blocks are formed synchronously with the shell body, which reduces the cost of production and processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic axonometric diagram of the overall structure of the present invention.

[0018] Figure 2 It is a bottom view schematic diagram of the overall structure of the present invention.

[0019] Figure 3 It is an exploded view of the overall structure of the present invention.

[0020] Figure 4 It is a schematic diagram of the chassis guard plate structure of the present invention.

[0021] Figure 5 It is a schematic diagram of the structure of the liquid cooling plate of the present invention.

[0022] Figure 6 It is a bottom view schematic diagram of the chassis guard plate structure of the present invention.

[0023] Figure 7 It is a side sectional schematic diagram of the overall structure of the present invention.

[0024] Figure 8 It is a side schematic diagram of the overall structure of the present invention.

[0025] Fig. 9 For the present invention Figure 8A schematic diagram of the enlarged structure in the middle.

[0026] In the figure: 1. Shell body; 2. Chassis guard plate; 3. Crossbeam; 4. Liquid cooling plate mounting groove; 5. Liquid cooling plate; 6. Heat transfer liquid circulation chamber; 7. Mounting bolts; 8. Tensile reinforcement ribs; 11. Frame reinforcement ribs; 12. Longitudinal reinforcement ribs; 13. Energy absorption block; 14. Deformation groove; 21. First groove; 22. Second groove; 23. Third groove; 24. Heat dissipation fins; 3. Crossbeam; 4. Liquid cooling plate mounting groove; 41. Positioning hole; 42. Positioning pin; 5. Liquid cooling plate; 51. Heat transfer plate; 52. Heat transfer fins; 61. Receiving groove; 62. Guide groove; 63. Liquid cooling pipe joint; 71. Mounting groove; 72. Sealing sleeve. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] like Figures 1 to 9 As shown, the one-piece cast battery module shell assembly provided according to the present invention is essentially a power battery shell composed of a shell body 1, a chassis guard plate 2 and a liquid cooling plate 5, and the shell body 1, the chassis guard plate 2 and the liquid cooling plate 5 are all formed by one-piece casting. The shell body 1 serves as the main side protection structure of the battery, and the one-piece molding method can effectively ensure the structural strength of the shell body 1. The chassis guard plate 2 serves as the main protection structure at the bottom of the battery, and the one-piece molding method can also ensure its structural strength. The liquid cooling plate 5 serves as the main thermal conductivity and heat dissipation structure of the battery, and the one-piece molding method can simultaneously produce the thermal fins 52 used for heat transfer and the liquid cooling plate 5, thereby reducing the production cost while ensuring its thermal conductivity effect. Compared with the battery shell processed by profile welding in the traditional technology, the present technical solution can effectively improve the structural strength and heat dissipation performance of the battery shell, and effectively reduce the cost.

[0029] In terms of specific structural installation, the structural body can be constructed according to the inventive concept of this embodiment, and no special limitation is made in this embodiment.

[0030] In this embodiment, the integrally cast battery module housing assembly includes: The housing body 1 is configured as a square structure and has an inner cavity for accommodating a battery; A frame-shaped reinforcing rib 11, which is located at the bottom end of the inner side wall of the housing main body 1 and is flush with the lower surface of the housing main body 1, and the frame-shaped reinforcing rib 11 is used to improve the structural strength and horizontal compressive performance of the housing main body 1; Longitudinal reinforcing ribs 12, there are multiple of them and they are all located between the frame-shaped reinforcing rib 11 and the inner wall of the housing main body 1, and the longitudinal reinforcing ribs 12 are used to improve the connection strength between the frame-shaped reinforcing rib 11 and the housing main body 1; An energy-absorbing block 13, which is located at the inner bottom end of the housing main body 1 and is flush with the lower surface of the housing main body 1. A plurality of strip-shaped deformation grooves 14 are provided in the middle of the energy-absorbing block 13, and the energy-absorbing block 13 can collapse and deform along the deformation grooves 14 to absorb the impact force received by the housing main body 1; A chassis guard plate 2, which is provided below the housing main body 1 and seals the inner cavity of the housing main body 1; A first groove 21, which is provided in the middle of the lower surface of the chassis guard plate 2; Second grooves 22, there are multiple of them and they are all provided at the bottom of the first groove 21; A third groove 23, which is located at the bottom of the second groove 22 and is designed in a "C" shape; Heat dissipation fins 24, there are multiple of them and they are all located at the bottom of the third groove 23, and the top ends of the heat dissipation fins 24 extend into the internal part of the heat-conducting liquid circulation cavity 6. Restricted by the "C" shape structure of the third groove 23, multiple heat dissipation fins 24 form a "C" shape structure, and the "C" shape structures formed by adjacent two groups of heat dissipation fins 24 are symmetrically arranged. The "C" shape structure design enables there to be a space in the shape of a "middle" character between the two groups of heat dissipation fins 24 for air flow, so that the air has a larger entry surface and discharge surface; The first groove 21, the second groove 22 and the third groove 23 form a stepped structure to protect the heat dissipation fins 24. It should be specifically noted that although the stepped structure can reduce the probability of the heat dissipation fins 24 being damaged by external collisions, it cannot completely avoid it. Therefore, the heat dissipation fins 24 can only play an auxiliary role in dissipating heat from the battery, and the active heat dissipation of the battery still needs to be completed by the cooling system of the vehicle. The significance of the design of the heat dissipation fins 24 is to reduce the heat dissipation pressure of the cooling system; A cross beam 3, which is provided inside the housing main body 1 and is flush with the bottom end of the housing main body 1, and the cross beam 3 is set in a structure with a partially hollowed-out; A liquid-cooled plate installation groove 4, which is provided on the upper surface of the chassis guard plate 2 and its area is smaller than that of the housing main body 1; Positioning holes 41 and positioning pins 42. The positioning holes 41 are provided at the four corners of the bottom of the liquid-cooled plate installation groove 4, and the positioning pins 42 are provided at the four corners of the lower surface of the liquid-cooled plate 5. The positioning holes 41 and the positioning pins 42 limit the position of the liquid-cooled plate 5 in the liquid-cooled plate installation groove 4; The liquid cooling plate 5 is located inside the liquid cooling plate installation groove 4 and fits against the bottom end of the housing main body 1; The heat conducting plate 51 and the heat conducting fins 52. There are multiple heat conducting plates 51, all of which are located on the lower surface of the liquid cooling plate 5. The multiple heat conducting plates 51 are respectively arranged in an alternating manner with multiple third grooves 23. There are multiple heat conducting fins 52, all of which are located on the lower surface of the heat conducting plate 51. The heat conducting fins 52 and the heat dissipating fins 24 are both set as horizontal structures, and the heat conducting fins 52 and the heat dissipating fins 24 are arranged in an alternating manner. The heat conducting liquid in the heat conducting liquid circulation cavity 6 can flow through the heat conducting fins 52 and the heat dissipating fins 24 in sequence to achieve heat exchange; The heat conducting liquid circulation cavity 6 is arranged at the bottom of the liquid cooling plate installation groove 4. The liquid cooling plate installation groove 4 and the liquid cooling plate 5 limit the circulation path of the heat conducting liquid inside the heat conducting liquid circulation cavity 6. The heat conducting liquid circulation cavity 6 is set as an "E"-shaped structure; There are multiple accommodating grooves 61, all of which are located at the bottom of the heat conducting liquid circulation cavity 6. The multiple accommodating grooves 61 correspond to the positions of multiple groups of heat conducting plates 51 respectively, and both the accommodating grooves 61 and the heat conducting plates 51 are set as "middle"-shaped structures. The design of the "middle"-shaped structure can be adapted to the "匚"-shaped structure composed of multiple heat dissipating fins 24. The accommodating grooves 61 and the heat conducting plates 51 can temporarily store the heat conducting liquid to provide a heat exchange medium between the heat conducting fins 52 and the heat dissipating fins 24; The diversion groove 62 is located at the end of the heat conducting liquid circulation cavity 6. The diversion groove 62 and the heat conducting liquid circulation cavity 6 form a "日"-shaped circulation path to facilitate the circulation of the heat conducting liquid; The liquid cooling pipe joint 63 is located in the middle of the outer side of the housing main body 1 and is communicated with the inside of the diversion groove 62. The liquid cooling pipe joint 63 is used to connect the heat conducting liquid in the heat conducting liquid circulation cavity 6 to the cooling pipeline; The mounting bolt 7 is located in the middle of the cross beam 3. There is a mounting groove 71 corresponding to the mounting bolt 7 at the middle bottom end of the chassis guard plate 2. There is a sealing sleeve 72 corresponding to the mounting bolt 7 in the middle of the liquid cooling plate 5. The mounting bolt 7, the mounting groove 71 and the sealing sleeve 72 limit the positions among the housing main body 1, the chassis guard plate 2 and the liquid cooling plate 5; There are multiple tensioning and strengthening ribs 8, all of which are located on the outer side wall of the housing main body 1. The tensioning and strengthening ribs 8 are used to improve the connection strength between the chassis guard plate 2 and the housing main body 1, so as to improve the bearing performance of the chassis guard plate 2 for the battery inside the housing main body 1. And the tensioning and strengthening ribs 8 can form a protective barrier on the outer side of the housing main body 1. The protective barrier can reduce the probability of the housing main body 1 being damaged due to collision during transportation and assembly; The housing main body 1, the chassis guard plate 2 and the liquid cooling plate 5 are all produced and processed by an integral casting method. The housing main body 1, the chassis guard plate 2 and the liquid cooling plate 5 can be assembled after casting.

[0031] When the integrally cast battery module housing assembly of this embodiment is used, the housing body 1, the chassis guard plate 2 and the liquid cooling plate 5 are assembled by installing bolts 7, the battery can be installed in the inner cavity of the housing body 1, and the chassis guard plate 2 can support and protect the battery; The shell body 1 can protect the battery in the horizontal direction. When the battery is used in a car, when the battery is hit in the direction of the car's travel, the shell body 1 is deformed due to the collision. At this time, the energy-absorbing block 13 inside the shell body 1 can collapse and deform along the deformation groove 14 to absorb the kinetic energy of the collision, thereby reducing the deformation of the shell body 1 near the battery side, thereby achieving the effect of protecting the battery. In addition, the crossbeam 3 and the frame-shaped reinforcement rib 11 inside the shell body 1 can improve its structural strength, thereby reducing the deformation of the shell body 1 when it is hit; During use of the battery, the liquid cooling pipe joint 63 can be connected to the cooling system of the automobile, and the thermal conductive liquid in the thermal conductive liquid circulation chamber 6 can enter the cooling system through the liquid cooling pipe joint 63 for cooling. During this process, the heat generated by the battery operation is transferred to the thermal conductive fins 52 through the heat conductive plate 51, and the thermal conductive fins 52 transfer the heat to the heat dissipation fins 24 through the thermal conductive liquid in the receiving groove 61. The heat dissipation fins 24 transfer the heat to the air under the chassis guard plate 2. Since the heat dissipation fins 24 are arranged under the chassis guard plate 2, the air flow rate under the heat dissipation fins 24 is faster during the process of following the movement of the automobile, which can ensure the heat transfer effect between the heat dissipation fins 24 and the air, thereby achieving the effect of auxiliary heat dissipation. In addition, the heat dissipation fins 24 are arranged at the top of the stepped structure composed of the first groove 21, the second groove 22 and the third groove 23, so their height is higher than the lower surface of the chassis guard plate 2, which can reduce the probability of it being damaged by collision.

[0032] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An integrally cast battery module housing assembly, characterized in that: Comprising: A housing main body (1), which is configured as a square structure and has an inner cavity for accommodating a battery; A chassis guard plate (2), which is disposed below the housing main body (1) and seals the inner cavity inside the housing main body (1); A cross beam (3), which is disposed inside the housing main body (1) and is flush with the bottom end of the housing main body (1), and the cross beam (3) is configured as a structure with a partially hollowed-out part; A liquid cooling plate mounting groove (4), which is disposed on the upper surface of the chassis guard plate (2) and has an area smaller than that of the housing main body (1); A liquid cooling plate (5), which is located inside the liquid cooling plate mounting groove (4) and fits against the bottom end of the housing main body (1); A heat-conducting liquid circulation cavity (6), which is disposed at the bottom of the liquid cooling plate mounting groove (4), the liquid cooling plate mounting groove (4) and the liquid cooling plate (5) limit the circulation path of the heat-conducting liquid inside the heat-conducting liquid circulation cavity (6), and the heat-conducting liquid circulation cavity (6) is configured as an "E" - shaped structure.

2. The integrally cast battery module housing assembly according to claim 1, characterized in that: Further comprising: A first groove (21), which is disposed in the middle of the lower surface of the chassis guard plate (2); A plurality of second grooves (22), all of which are disposed at the bottom of the first groove (21); A third groove (23), which is located at the bottom of the second groove (22) and is configured as a "匚" - shaped structure; A plurality of heat dissipation fins (24), all of which are located at the bottom of the third groove (23), and the top ends of the heat dissipation fins (24) extend into the interior of the heat-conducting liquid circulation cavity (6); The first groove (21), the second groove (22) and the third groove (23) form a stepped structure to protect the heat dissipation fins (24).

3. The integrally cast battery module housing assembly according to claim 2, characterized in that: Further comprising: Heat-conducting plates (51) and heat-conducting fins (52), a plurality of the heat-conducting plates (51) are all disposed on the lower surface of the liquid cooling plate (5), the plurality of heat-conducting plates (51) are respectively arranged staggered with a plurality of the third grooves (23), a plurality of the heat-conducting fins (52) are all disposed on the lower surface of the heat-conducting plates (51), the heat-conducting fins (52) and the heat dissipation fins (24) are both configured as horizontal structures, and the heat-conducting fins (52) and the heat dissipation fins (24) are arranged staggered, and the heat-conducting liquid in the heat-conducting liquid circulation cavity (6) can flow through the heat-conducting fins (52) and the heat dissipation fins (24) in sequence to achieve heat exchange.

4. The integrally cast battery module housing assembly according to claim 3, characterized in that: Further comprising: A plurality of accommodating grooves (61), all of which are located at the bottom of the heat-conducting liquid circulation cavity (6), the plurality of accommodating grooves (61) correspond to the positions of multiple groups of heat-conducting plates (51) respectively, and both the accommodating grooves (61) and the heat-conducting plates (51) are configured as "中" - shaped structures, and the accommodating grooves (61) and the heat-conducting plates (51) can temporarily store heat-conducting liquid to provide a heat exchange medium between the heat-conducting fins (52) and the heat dissipation fins (24).

5. The integrally cast battery module housing assembly according to claim 4, characterized in that: Further comprising: A diversion groove (62), which is located at the end of the heat-conducting liquid circulation cavity (6); A liquid cooling pipe joint (63), which is located in the middle of the outside of the housing main body (1) and is communicated with the inside of the diversion groove (62), and the liquid cooling pipe joint (63) is used to connect the heat-conducting liquid in the heat-conducting liquid circulation cavity (6) to a cooling pipeline.

6. The integrally cast battery module housing assembly according to claim 1, characterized in that: Further comprising: A mounting bolt (7) is located in the middle of the crossbeam (3); a mounting groove (71) corresponding to the mounting bolt (7) is provided in the middle of the bottom end of the chassis guard plate (2); a sealing sleeve (72) corresponding to the mounting bolt (7) is provided in the middle of the liquid cooling plate (5); the mounting bolt (7), the mounting groove (71) and the sealing sleeve (72) limit the position between the housing body (1), the chassis guard plate (2) and the liquid cooling plate (5).

7. The integrally cast battery module housing assembly according to claim 1, characterized in that: Also includes: Positioning holes (41) and positioning pins (42), wherein the positioning holes (41) are arranged at the four corners of the bottom of the liquid cooling plate installation groove (4), and the positioning pins (42) are arranged at the four corners of the lower surface of the liquid cooling plate (5), and the positioning holes (41) and the positioning pins (42) limit the position of the liquid cooling plate (5) in the liquid cooling plate installation groove (4).

8. The integrally cast battery module housing assembly according to claim 1, characterized in that: Also includes: A frame-shaped reinforcing rib (11), which is located at the bottom end of the inner side wall of the shell body (1) and is flush with the lower surface of the shell body (1), and the frame-shaped reinforcing rib (11) is used to improve the structural strength and horizontal compressive resistance of the shell body (1); A plurality of longitudinal reinforcing ribs (12) are provided and are all located between the frame-shaped reinforcing ribs (11) and the inner wall of the outer shell body (1), wherein the longitudinal reinforcing ribs (12) are used to increase the connection strength between the frame-shaped reinforcing ribs (11) and the outer shell body (1).

9. The integrally cast battery module housing assembly according to claim 1, characterized in that: Also includes: An energy absorbing block (13) is located at the inner bottom end of the shell body (1) and is flush with the lower surface of the shell body (1); a plurality of strip-shaped deformation grooves (14) are provided in the middle of the energy absorbing block (13); the energy absorbing block (13) can collapse and deform along the deformation grooves (14) to absorb the impact force exerted on the shell body (1); A plurality of tension reinforcement ribs (8) are provided and are all located on the outer side wall of the outer shell body (1). The tension reinforcement ribs (8) are used to improve the connection strength between the chassis guard plate (2) and the outer shell body (1), so as to improve the load-bearing performance of the chassis guard plate (2) on the batteries inside the outer shell body (1), and the tension reinforcement ribs (8) can form a protective barrier on the outer side of the outer shell body (1).

10. The integrally cast battery module housing assembly according to claim 1, characterized in that: Also includes: The housing body (1), the chassis guard plate (2) and the liquid cooling plate (5) are all produced and processed by an integral casting method.

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