Box body structure for battery pack and battery pack

Abstract

The utility model relates to the technical field of battery packs, and discloses a box body structure for a battery pack and the battery pack, the box body structure comprises an outer frame and a reinforcing convex beam convexly arranged on the inner wall of the outer frame, the outer frame is provided with a first mounting hole, a second mounting hole and a third mounting hole, a first avoiding notch is formed in the position, corresponding to the first mounting hole, of the reinforcing convex beam, a second avoiding notch is formed in the position, corresponding to the second mounting hole, of the reinforcing convex beam, and a third avoiding notch is formed in the position, corresponding to the third mounting hole, of the reinforcing convex beam; the first avoiding notch is used for avoiding two conductive parts connected to an output interface, the second avoiding notch is used for accommodating a liquid inlet pipeline connected with the liquid inlet interface, and the third avoiding notch is used for accommodating a liquid outlet pipeline connected with the liquid outlet interface; the utility model mainly solves the problem of how to ensure that the box body structure has enough rigid strength and improve the energy density of the battery pack at the same time.

Description

A housing structure for a battery pack and a battery pack Technical Field

[0001] This utility model relates to the technical field of battery packs, and in particular to a housing structure and battery pack for use in battery packs. Background Technology

[0002] In recent years, the emergence of new energy vehicles has played a significant role in promoting social development and environmental protection. Power battery packs, as rechargeable batteries, are the power source for new energy vehicles and are widely used in this field. Specifically, current power battery packs typically have an output interface installed on the outer wall of the housing structure. This output interface is electrically connected to the battery control system inside the housing structure via two conductive components (mostly copper busbars, one with a positive terminal and the other with a negative terminal). This allows the battery control system to output electrical energy from the battery pack through the output interface. Furthermore, the battery pack also incorporates a pipe structure for liquid cooling of the internal battery modules. Existing battery pack housings typically have a large electrical space adjacent to the battery modules, within which the battery control system is placed. The width of this electrical space is much larger than the electrical... The width of the battery control system is designed to accommodate the battery control system while also providing electrical space to house the piping structure for liquid cooling and the two conductive components connecting the battery control system and the output interface. Due to the large volume of this electrical space, the space utilization rate of the battery pack is low. While ensuring sufficient rigidity of the housing structure, there is a problem of low battery energy density. On the other hand, while ensuring sufficient battery energy density, there is a problem of insufficient rigidity of the housing structure. Therefore, how to ensure sufficient rigidity of the housing structure while also improving the energy density of the battery pack is a technical challenge that urgently needs to be overcome in this field.

[0003] Therefore, improvements to existing technologies are necessary. Summary of the Invention

[0004] This utility model provides a housing structure and battery pack for a battery pack, mainly solving the technical problem of how to ensure that the housing structure has sufficient rigidity and strength while also improving the energy density of the battery pack.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A battery pack housing structure includes an outer frame and a reinforcing beam protruding from the inner wall of the outer frame. The outer frame has a first mounting hole for mounting an output interface, a second mounting hole for mounting a liquid inlet interface, and a third mounting hole for mounting a liquid outlet interface. The reinforcing beam has a first clearance notch at the position corresponding to the first mounting hole, a second clearance notch at the position corresponding to the second mounting hole, and a third clearance notch at the position corresponding to the third mounting hole. The first clearance notch is used to avoid two conductive parts connected to the output interface, the second clearance notch is used to accommodate a liquid inlet pipe connected to the liquid inlet interface, and the third clearance notch is used to accommodate a liquid outlet pipe connected to the liquid outlet interface.

[0007] In one of the technical solutions, the outer frame includes a first side frame and a second side frame arranged opposite to each other. The box structure has an electrical space for accommodating the high-voltage power distribution module of the battery on the adjacent position of the first side frame. Both the first side frame and the second side frame are provided with a first mounting hole for installing the output interface. The second side frame is provided with a second mounting hole and a third mounting hole. The reinforcing beam is at least provided on the second side frame, and a second clearance notch, a first clearance notch, and a third clearance notch are sequentially provided along the extension direction of the second side frame.

[0008] In one of the technical solutions, the box structure also includes reinforcing longitudinal beams connected inside the outer frame;

[0009] The reinforcing longitudinal beam extends from the electrical space toward the second frame. The side of the reinforcing longitudinal beam is used to limit the position of the battery module, and a receiving space is provided above the reinforcing longitudinal beam for accommodating the passage of the two conductive components.

[0010] In one of the technical solutions, a fourth mounting hole for installing an explosion-proof valve is also provided on the second frame. The fourth mounting hole is located at a position corresponding to the second clearance notch or the third clearance notch.

[0011] In one of the technical solutions, the box structure further includes a liquid-cooled base plate connected to the bottom of the outer frame. The liquid-cooled base plate is located below the reinforcing beam. A first through hole is provided at the bottom of the second clearance notch, which is used for the liquid inlet pipe to connect downward to the liquid-cooled base plate. A second through hole is provided at the bottom of the third clearance notch, which is used for the liquid outlet pipe to connect downward to the liquid-cooled base plate.

[0012] In one of the technical solutions, the bottom surface of the reinforcing beam is provided with an upwardly recessed groove, and a sealing gasket is provided in the groove. The liquid-cooled base plate is fixedly connected to the bottom of the outer frame and together with the reinforcing beam clamps the sealing gasket.

[0013] In one of the technical solutions, the housing structure further includes a bottom protective plate, which is connected to the bottom of the outer frame and located below the liquid-cooled bottom plate to cover the liquid-cooled bottom plate;

[0014] The box structure also includes mounting feet connected to the outer wall of the outer frame. The bottom of the mounting feet has a downward protrusion, and the bottom surface of the protrusion is lower than the bottom surface of the bottom guard plate.

[0015] In one of the technical solutions, the housing structure further includes a plurality of first fasteners and a plurality of second fasteners, wherein the first fasteners pass through the liquid-cooled base plate and fix the liquid-cooled base plate to the bottom of the outer frame;

[0016] The second fastener passes through the bottom protective plate and the liquid-cooled base plate in sequence and then fixes the bottom protective plate to the bottom of the outer frame. The outer edge of the bottom protective plate is provided with downward protruding avoidance parts at the positions corresponding to each of the first fasteners.

[0017] In one of the technical solutions, the outer frame is a hollow profile structure. The inner wall of the outer frame is provided with a first clearance opening, a second clearance opening and a third clearance opening. The first clearance opening corresponds to the first mounting hole and is connected to the first clearance notch. The second clearance opening corresponds to the second mounting hole and is connected to the second clearance notch. The third clearance opening corresponds to the third mounting hole and is connected to the third clearance notch.

[0018] This application also provides a battery pack, including a battery module, a battery control system, an output interface, a liquid inlet interface, a liquid outlet interface, a liquid inlet pipe, a liquid outlet pipe, and a housing structure as described in any of the above technical solutions;

[0019] The battery module and the battery control system are both arranged inside the housing structure. The battery control system is electrically connected to the battery module. Two conductive components are connected between the battery control system and the output interface.

[0020] The output interface is installed at the first mounting hole, the liquid inlet interface is installed at the second mounting hole, and the liquid outlet interface is installed at the third mounting hole. The ends of the two conductive components away from the battery control system are both housed in the first clearance notch. The liquid inlet pipe is connected to the liquid inlet interface and housed in the second clearance notch, and the liquid outlet pipe is connected to the liquid outlet interface and housed in the third clearance notch.

[0021] Compared with the prior art, the battery pack housing structure provided by this utility model has at least the following beneficial effects:

[0022] This solution significantly improves the overall rigidity of the battery pack structure by installing reinforcing beams on the inner wall of the existing outer frame, reducing the risk of structural deformation and enhancing battery pack safety. Based on these reinforcing beams, the solution also incorporates a first, second, and third clearance notch. The first clearance notch is designed to correspond to the output interface for fixing to the outer frame, allowing the two conductive components (mostly copper busbars with good conductivity) of the battery control system inside the battery pack to pass through the first clearance notch and connect to the output interface. This ensures the reinforcing beam does not obstruct the connection of the two conductive components to the output interface. Simultaneously, the second clearance notch is designed to correspond to the liquid inlet interface fixed to the outer frame, allowing the liquid inlet pipe inside the battery pack to be accommodated within the second clearance notch when connected to the liquid inlet interface. Similarly, the third clearance notch is designed to correspond to the liquid outlet interface fixed to the outer frame, allowing the liquid outlet pipe inside the battery pack to be accommodated within the third clearance notch when connected to the liquid outlet interface.

[0023] In summary, this solution improves the rigidity of the battery pack structure by adding reinforcing beams, thereby enhancing battery pack safety. Furthermore, the reinforcing beams are designed with various notches to avoid the liquid inlet pipe, liquid outlet pipe, and two conductive components connected to the output interface. This fully utilizes the space within the battery pack, allowing for a smaller electrical space to house the battery control system. This frees up more space to accommodate more battery cells, thus improving the battery pack's energy density. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 is a schematic diagram of a battery pack provided in an embodiment of this application;

[0026] Figure 2 is a schematic diagram of the battery pack shown in Figure 1 with the battery module hidden and viewed from another angle;

[0027] Figure 3 is a magnified view of part A in Figure 2;

[0028] Figure 4 is a magnified view of part B in Figure 2;

[0029] Figure 5 is a magnified view of part C in Figure 2;

[0030] Figure 6 is a structural schematic diagram of the box structure provided in the embodiment of this application;

[0031] Figure 7 is a top view of the battery pack shown in Figure 2;

[0032] Figure 8 is a cross-sectional view at point AA in Figure 7;

[0033] Figure 9 is a magnified view of part D in Figure 8.

[0034] Figure label:

[0035] 1. Enclosure structure; 10. Electrical space; 11. Outer frame; 111. First mounting hole; 112. Second mounting hole; 113. Third mounting hole; 114. First clearance opening; 115. Second clearance opening; 116. Third clearance opening; 117. First side frame; 118. Second side frame; 119. Fourth mounting hole; 12. Reinforcing beam; 121. First clearance notch; 122. Second clearance notch; 123. Third clearance notch; 124. First through hole; 125. Second through hole; 126. Groove; 13. Reinforcing longitudinal beam; 14. Reception space; 15. Reinforcing crossbeam; 16. Liquid-cooled base plate; 17. Sealing gasket; 18. Bottom protective plate; 181. Clearance section; 19. Mounting foot; 191. Protruding foot;

[0036] 2. Battery module; 3. Battery control system; 31. Control module; 32. High-voltage power distribution module; 4. Output interface; 5. Liquid inlet interface; 6. Liquid outlet interface; 7. Liquid inlet pipe; 8. Liquid outlet pipe; 9. Conductive component; 20. Data acquisition interface; 30. Explosion-proof valve; 40. First fastener; 50. Second fastener. Detailed Implementation

[0037] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0038] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0039] It should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0041] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0042] Please refer to Figures 1 to 6. This embodiment of the present invention provides a battery pack, mainly including a housing structure 1, a battery module 2, a battery control system 3, an output interface 4, a liquid inlet interface 5, a liquid outlet interface 6, a liquid inlet pipe 7, and a liquid outlet pipe 8. The battery module 2, battery control system 3, liquid inlet pipe 7, and liquid outlet pipe 8 are all arranged within the housing structure 1. An electrical space 10 is provided within the housing structure 1, and the battery control system 3 is specifically housed within the electrical space 10. The battery control system 3 includes a control module 31 (also known as a BMS in the art) and a high-voltage power distribution module 32 (also known as a BDU in the art). The control module 31 is electrically connected to each cell within the battery module 2 to collect data information (such as temperature data, voltage data, or current data) from each cell within the battery module 2. The high-voltage power distribution module 32 is electrically connected to the total positive and total negative terminals of the battery module 2, respectively. The high-voltage power distribution module 32 controls the battery module based on the data information collected by the control module 31. The on / off state of group 2 is controlled by the control module 31, which controls the process of external power supply charging the battery module 2. The output interface 4, the liquid inlet interface 5, and the liquid outlet interface 6 are all fixed on the outer wall of the housing structure 1. The output interface 4 is electrically connected to the high-voltage power distribution module 32 through two conductive parts 9 (most of the two conductive parts 9 are preferably copper busbars with good conductivity). External electrical appliances can obtain power from the battery module 2 by connecting to the output interface 4. The liquid inlet interface 5 is connected to the liquid inlet pipe 7 and is used to allow external coolant to enter the liquid inlet pipe 7. The liquid outlet interface 6 is connected to the liquid outlet pipe 8 and is used to allow the coolant inside the battery pack to flow out along the liquid outlet pipe 8 to achieve the purpose of cooling the battery module 2.

[0043] Please refer again to Figures 1 to 6. The housing structure 1 mainly includes an outer frame 11 and reinforcing beams 12 protruding from the inner wall of the outer frame 11. The outer frame 11 can enclose a rectangular space and may include four sequentially connected inner walls. The reinforcing beams 12 can be set on all the inner walls of the outer frame 11, or they can be set on only one or more inner walls of the outer frame 11. The reinforcing beams 12 can be a structure that is separately connected to the outer frame 11, or they can be a structure integrally formed with the outer frame 11. The reinforcing beams 12 can improve the overall rigidity of the housing structure 1, reduce the risk of deformation of the housing structure 1 under stress, and improve the safety of the battery pack. In this solution, the reinforcing beams 12 also serve to restrict the battery module 2, so that the battery module 2 can be stably placed inside the housing structure 1. Specifically, the outer frame 11 is provided with a first mounting hole 111, a second mounting hole 112, and a third mounting hole 113. The aforementioned output interface 4 is installed at the first mounting hole 111, the aforementioned liquid inlet interface 5 is installed at the second mounting hole 112, and the aforementioned liquid outlet interface 6 is installed at the third mounting hole 113. More specifically, the reinforcing beam 12 is provided with a first clearance notch 121 at the position corresponding to the first mounting hole 111, a second clearance notch 122 at the position corresponding to the second mounting hole 112, and a third clearance notch 123 at the position corresponding to the third mounting hole 113. The first clearance notch 121 is used to accommodate the ends of the two conductive parts 9 that are away from the battery control system 3, the second clearance notch 122 is used to accommodate the aforementioned liquid inlet pipe 7, and the third clearance notch 123 is used to accommodate the aforementioned liquid outlet pipe 8. In other words, by providing a first clearance notch 121, a second clearance notch 122, and a third clearance notch 123 on the reinforcing beam 12, the two conductive components 9 connected to the battery control system 3 can pass through the first clearance notch 121 and connect to the output interface 4. That is, the reinforcing beam 12 will not obstruct the connection of the two conductive components 9 to the output interface 4. At the same time, this solution also allows the liquid inlet pipe 7 inside the battery pack to be accommodated in the second clearance notch 122 when connected to the liquid inlet interface 5, and the liquid outlet pipe 8 inside the battery pack to be accommodated in the third clearance notch 123 when connected to the liquid outlet interface 6. The reinforcing beam 12 of this solution provides clearance for the liquid inlet pipe 7, the liquid outlet pipe 8, and the two conductive components 9 connected to the output interface 4, thereby making full use of the space inside the battery pack. As a result, the existing electrical space 10 used to accommodate the battery control system 3 can be made smaller, which is conducive to freeing up more space to arrange more battery cells, that is, it is conducive to improving the energy density of the battery pack.

[0044] Please refer to Figures 2 and 3 together. The outer frame 11 is preferably a hollow profile structure. This structure ensures high rigidity and strength while reducing the overall weight of the housing structure 1 to meet the battery pack's requirement that it should not be too heavy. The inner wall of the outer frame 11 is provided with a first clearance opening 114, a second clearance opening 115, and a third clearance opening 116. The first clearance opening 114 corresponds to the first mounting hole 111 and is connected to the first clearance notch 121, allowing the two conductive parts 9 to pass through the first clearance opening 114 and connect to the output interface 4. The second clearance opening 115 corresponds to the second mounting hole 112 and is connected to the second clearance notch 122, allowing the liquid inlet pipe 7 to pass through the second clearance opening 115 and connect to the liquid inlet interface 5. The third clearance opening 116 corresponds to the third mounting hole 113 and is connected to the third clearance notch 123, allowing the liquid outlet pipe 8 to pass through the third clearance opening 116 and connect to the liquid outlet interface 6. To facilitate the connection between the conductive component 9 and the output interface 4, the size of the first clearance opening 114 is designed to be larger than the size of the first mounting hole 111. To facilitate the connection between the liquid inlet pipe 7 and the liquid inlet interface 5, the size of the second clearance opening 115 is designed to be larger than the size of the second mounting hole 112. To facilitate the connection between the liquid outlet pipe 8 and the liquid outlet interface 6, the size of the third clearance opening 116 is designed to be larger than the size of the third mounting hole 113.

[0045] Please refer again to Figures 1 to 6. The outer frame 11 specifically includes a first frame 117 and a second frame 118 arranged opposite to each other. The electrical space 10 is arranged in an adjacent position to the first frame 117, that is, the battery control system 3 is arranged in an adjacent position to the first frame 117. The first mounting hole 111 is designed on both the first frame 117 and the second frame 118, that is, an output interface 4 is installed on both the first frame 117 and the second frame 118, so that the battery pack can discharge to the outside at both the front and rear ends, meeting the design requirements of front-wheel drive or four-wheel drive new energy vehicles. The second frame 118 is provided with the aforementioned second mounting hole 112 and third mounting hole 113. In fact, the reinforcing beam 12 is provided at least on the second frame 118, and the second clearance notch 122, the first clearance notch 121, and the third clearance notch 123 are provided sequentially along the extension direction of the second frame 118, so that the output interface 4 can be set at the liquid outlet interface 6 and the liquid inlet interface 5, thereby improving the space utilization rate and avoiding interference between the liquid outlet interface 6 and the liquid outlet pipe 8, and between the liquid inlet interface 5 and the liquid inlet pipe 7 during installation.

[0046] Furthermore, the acquisition interface 20 is installed on the first frame 117 adjacent to the battery control system 3. More specifically, the acquisition interface 20 is positioned on the first frame 117 near the control module 31 to facilitate electrical connection between the acquisition interface 20 and the control module 31, thus shortening the wiring length. Preferably, to further improve the safety of the battery pack, an explosion-proof valve 30 is installed on both the first frame 117 and the second frame 118. Specifically, a fourth mounting hole 119 for installing the explosion-proof valve 30 is also provided on the second frame 118. The fourth mounting hole 119 is positioned at the location corresponding to the second clearance notch 122 or the third clearance notch 123. That is, the second clearance notch 122 or the third clearance notch 123 in this solution can serve as an exhaust space for gas to be discharged outwards from the explosion-proof valve 30, thereby further improving the space utilization rate within the battery pack and thus contributing to increasing the energy density of the battery pack.

[0047] Please refer to Figures 2 and 4 together. The housing structure 1 also includes a reinforcing longitudinal beam 13 connected inside the outer frame 11. The reinforcing longitudinal beam 13 extends from the electrical space 10 to the second frame 118. The reinforcing longitudinal beam 13 can further improve the rigidity of the housing structure 1. The side of the reinforcing longitudinal beam 13 is used to restrict the position of the battery module 2, so that the battery module 2 is stable inside the housing structure 1. In addition, a receiving space 14 is provided above the reinforcing longitudinal beam 13 for accommodating the passage of the two conductive components 9. By designing the two conductive components 9 in the receiving space 14, the housing structure 1 can have more space to install the battery module 2, thereby further improving the energy density of the battery. Optionally, the receiving space 14 can be the top surface of the reinforcing longitudinal beam 13, forming the receiving space 14 through the space above the top surface. Optionally, a recess can also be formed on the top surface of the reinforcing longitudinal beam 13, forming the receiving space 14 through the recess, to further save space. Preferably, the housing structure 1 further includes multiple reinforcing crossbeams 15 connected inside the outer frame 11. The length direction of the reinforcing crossbeams 15 is perpendicular to the length direction of the reinforcing longitudinal beams 13. The reinforcing crossbeams 15 can further improve the rigidity of the housing structure 1. The reinforcing longitudinal beams 13 are also fixedly connected to each reinforcing crossbeam 15. The sides of each reinforcing crossbeam 15 are also used to limit the position of the battery module 2, ensuring that the battery module 2 is more securely fixed inside the housing structure 1.

[0048] Please refer to Figures 2 to 6. The housing structure 1 also includes a liquid-cooled base plate 16, which is connected to the bottom of the outer frame 11. The liquid-cooled base plate 16 is located below the reinforcing beam 12 and also below the battery module 2. The liquid-cooled base plate 16 is used to cool the bottom surface of the battery module 2 to ensure that the battery module 2 operates within a suitable temperature range. Specifically, the bottom of the aforementioned second clearance notch 122 has a downward-through first through hole 124, which is used to supply the liquid inlet pipe 7 to connect downward to the liquid-cooled base plate 16. The bottom of the aforementioned third clearance notch 123 has a downward-through second through hole 125, which is used to supply the liquid outlet pipe 8 to connect downward to the liquid-cooled base plate 16. By further opening holes on the reinforcing beam 12, the space utilization rate inside the battery pack can be improved while meeting the need for cooling the bottom surface of the battery module 2, thereby helping to improve the energy density of the battery pack.

[0049] Please refer to Figures 7 to 9. The bottom surface of the reinforcing beam 12 is provided with an upwardly recessed groove 126. A sealing gasket 17 is provided in the groove 126. The liquid-cooled base plate 16 is fixedly connected to the bottom of the outer frame 11 and together with the reinforcing beam 12, clamps the sealing gasket 17 to seal the gap between the liquid-cooled base plate 16 and the reinforcing beam 12, reducing the risk of liquid leakage from the bottom of the battery pack and improving the safety of the battery pack. In addition, the housing structure 1 of this embodiment also includes a bottom protective plate 18. The bottom protective plate 18 is a stamped part with good rigidity. The bottom protective plate 18 is connected to the bottom of the outer frame 11 and is located below the liquid-cooled base plate 16 to cover the liquid-cooled base plate 16. The bottom protective plate 18 plays a role in protecting the liquid-cooled base plate 16. In order to improve the protective performance of the bottom protective plate 18 on the liquid-cooled base plate 16 under vibration conditions, a buffer pad (such as sponge) can be provided between the bottom protective plate 18 and the liquid-cooled base plate 16. The housing structure 1 also includes mounting feet 19 connected to the outer wall of the outer frame 11. The mounting feet 19 are used to fix the entire battery pack in a preset position. The bottom of the mounting feet 19 has a protruding foot 191. The bottom surface of the protruding foot 191 is lower than the bottom surface of the bottom guard plate 18, which prevents the bottom guard plate 18 from being directly subjected to a large impact force during the installation, transportation or vehicle driving of the battery pack, thereby reducing the risk of the liquid cooling bottom plate 16 being damaged and leaking coolant, and thus improving the safety of the battery pack.

[0050] Please refer to Figure 9 again. Preferably, the housing structure 1 further includes a plurality of first fasteners 40 and a plurality of second fasteners 50. The first fasteners 40 pass through the liquid-cooled base plate 16 and fix the liquid-cooled base plate 16 to the bottom of the outer frame 11. The second fasteners 50 pass through the bottom guard plate 18 and the liquid-cooled base plate 16 in sequence and fix the bottom guard plate 18 to the bottom of the outer frame 11. Correspondingly, the outer edge of the bottom guard plate 18 is provided with a downwardly protruding relief portion 181 at the position corresponding to each of the first fasteners 40, so that the bottom guard plate 18 will not interfere with the first fasteners 40 when it is fixed to the outer frame 11.

[0051] The above are merely preferred embodiments of the present utility model, and only specifically describe the technical principles of the present utility model. These descriptions are only for explaining the principles of the present utility model and should not be construed as limiting the scope of protection of the present utility model in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model, as well as other specific embodiments of the present utility model that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of the present utility model.

Claims

1. A housing structure for a battery pack, characterized in that, The device includes an outer frame (11) and a reinforcing beam (12) protruding from the inner wall of the outer frame (11). The outer frame (11) is provided with a first mounting hole (111) for installing an output interface, a second mounting hole (112) for installing an inlet interface, and a third mounting hole (113) for installing an outlet interface. The reinforcing beam (12) has a first clearance notch (121) at the position corresponding to the first mounting hole (111), a second clearance notch (122) at the position corresponding to the second mounting hole (112), and a third clearance notch (123) at the position corresponding to the third mounting hole (113). The first clearance notch (121) is used to avoid two conductive parts connected to the output interface, the second clearance notch (122) is used to accommodate an inlet pipe connected to the inlet interface, and the third clearance notch (123) is used to accommodate an outlet pipe connected to the outlet interface.

2. The housing structure for a battery pack as described in claim 1, characterized in that, The outer frame (11) includes a first side frame (117) and a second side frame (118) arranged opposite to each other. The box structure has an electrical space (10) for accommodating the high voltage power distribution module of the battery at an adjacent position of the first side frame (117). The first side frame (117) and the second side frame (118) are each provided with a first mounting hole (111) for installing the output interface. The second side frame (118) is provided with a second mounting hole (112) and a third mounting hole (113). The reinforcing beam (12) is provided at least on the second side frame (118), and a second clearance notch (122), a first clearance notch (121), and a third clearance notch (123) are arranged sequentially along the extension direction of the second side frame (118).

3. The housing structure for a battery pack as described in claim 2, characterized in that, The box structure also includes a reinforcing longitudinal beam (13) connected inside the outer frame (11); the reinforcing longitudinal beam (13) extends from the electrical space (10) to the second frame (118), and a receiving space (14) for accommodating the passage of the two conductive components is provided above the reinforcing longitudinal beam (13).

4. The housing structure for a battery pack as described in claim 2, characterized in that, The second frame (118) also has a fourth mounting hole (119) for installing an explosion-proof valve. The fourth mounting hole (119) is located at a position corresponding to the second clearance notch (122) or the third clearance notch (123).

5. The housing structure for a battery pack as described in claim 1, characterized in that, The box structure also includes a liquid-cooled base plate (16) connected to the bottom of the outer frame (11). The liquid-cooled base plate (16) is located below the reinforcing beam (12). The bottom of the second clearance notch (122) is provided with a first through hole (124) that penetrates downwards. The first through hole (124) is used for the liquid inlet pipe to connect downwards to the liquid-cooled base plate (16). The bottom of the third clearance notch (123) is provided with a second through hole (125) that penetrates downwards. The second through hole (125) is used for the liquid outlet pipe to connect downwards to the liquid-cooled base plate (16).

6. The housing structure for a battery pack as described in claim 5, characterized in that, The bottom surface of the reinforcing beam (12) is provided with an upwardly recessed groove (126), and a sealing gasket (17) is provided in the groove (126). The liquid-cooled base plate (16) is fixedly connected to the bottom of the outer frame (11) and together with the reinforcing beam (12) clamps the sealing gasket (17).

7. The housing structure for a battery pack as described in claim 5, characterized in that, The enclosure structure also includes a bottom protective plate (18), which is connected to the bottom of the outer frame (11) and located below the liquid-cooled bottom plate (16) to cover the liquid-cooled bottom plate (16); the enclosure structure also includes mounting feet (19) connected to the outer wall of the outer frame (11), with a protruding foot (191) protruding downward at the bottom of the mounting foot (19), and the bottom surface of the protruding foot (191) being lower than the bottom surface of the bottom protective plate (18).

8. The housing structure for a battery pack as described in claim 7, characterized in that, The enclosure structure also includes a plurality of first fasteners (40) and a plurality of second fasteners (50). The first fasteners (40) pass through the liquid-cooled base plate (16) and fix the liquid-cooled base plate (16) to the bottom of the outer frame (11). The second fasteners (50) pass through the bottom guard plate (18) and the liquid-cooled base plate (16) in sequence and fix the bottom guard plate (18) to the bottom of the outer frame (11). The outer edge of the bottom guard plate (18) is provided with a downwardly protruding relief portion (181) at the position corresponding to each of the first fasteners (40).

9. The housing structure for a battery pack as described in any one of claims 1 to 8, characterized in that, The outer frame (11) is a hollow profile structure. The inner wall of the outer frame (11) is provided with a first clearance opening (114), a second clearance opening (115) and a third clearance opening (116). The first clearance opening (114) corresponds to the first mounting hole (111) and is connected to the first clearance notch (121). The second clearance opening (115) corresponds to the second mounting hole (112) and is connected to the second clearance notch (122). The third clearance opening (116) corresponds to the third mounting hole (113) and is connected to the third clearance notch (123).

10. A battery pack, characterized in that, The enclosure includes a battery module (2), a battery control system (3), an output interface (4), a liquid inlet interface (5), a liquid outlet interface (6), a liquid inlet pipe (7), a liquid outlet pipe (8), and a housing structure (1) as described in any one of claims 1 to 9; the battery module (2) and the battery control system (3) are both arranged inside the housing structure (1), the battery control system (3) is electrically connected to the battery module (2), and two conductive components (9) are connected between the battery control system (3) and the output interface (4); the output interface (4) is installed on... At the first mounting hole (111), the liquid inlet (5) is installed at the second mounting hole (112), the liquid outlet (6) is installed at the third mounting hole (113), the ends of the two conductive parts (9) away from the battery control system (3) are both housed in the first clearance notch (121), the liquid inlet pipe (7) is connected to the liquid inlet (5) and housed in the second clearance notch (122), and the liquid outlet pipe (8) is connected to the liquid outlet (6) and housed in the third clearance notch (123).

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