Battery pack and electric automobile comprising same

Abstract

The utility model discloses a battery pack and electromobile including the battery pack, the battery pack includes the battery box body, the battery box body includes front beam, back beam and two side wall, the front beam and back beam are connected to the front and back ends of two side wall respectively, the battery box body includes the battery box body, the battery box body includes the battery box body. The two side walls are arranged on the front beam, so that the front beam, the rear beam and the two side walls are encircled to form a frame structure, a first cavity is formed in the front beam and / or the rear beam, and the front beam is used for mounting functional parts. The electric automobile comprises the battery pack. The frame structure is defined by the front beam, the rear beam and the two side walls, and the first cavity is formed in the front beam and / or the rear beam, so that the overall weight of the battery box body is reduced and materials are reduced under the condition that the overall structural strength of the battery pack meets the requirement, and the effect of reducing the weight of the battery pack is achieved; and the processing technology is simple and the cost is low. And meanwhile, the functional parts are arranged on the front beam, so that the mounting and the arrangement are very convenient.

Description

Technical Field

[0001] The utility model relates to a battery pack and an electric vehicle comprising the battery pack. Background Art

[0002] Electric vehicles have the advantages of zero emissions, low noise, and economical operation and maintenance, and are becoming more and more popular among users. The energy used by electric vehicles is the electricity provided by the battery packs on board. Electric vehicles need to be charged after the electricity is used up. The battery packs of electric vehicles are generally divided into fixed and replaceable types. Among them, fixed battery packs are generally fixed on the vehicle, and the vehicle is directly used as the charging object when charging. The replaceable battery packs are generally fixed on the bracket of the vehicle through a movable installation method. The battery pack can be removed for replacement or charging operations separately. After the replaced battery pack is charged, it is installed on the vehicle.

[0003] The existing battery pack includes a battery body and a battery box. The four side walls of the battery box are made of sheet metal and welded to each other. The battery body is installed in the battery box, and the lock connection structure, electrical connector and other components are installed on the battery box. Since the battery box is made of sheet metal, the overall weight of the battery pack is heavier, resulting in higher strength requirements for the installation of the battery pack, which greatly increases the cost. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the defect in the prior art that the overall weight of the battery pack is heavy, resulting in higher strength requirements for the installation of the battery pack and greatly increased costs, and to provide a battery pack and an electric vehicle containing the same.

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] A battery pack comprises a battery box, wherein the battery box comprises a front beam, a rear beam and two side walls, wherein the front beam and the rear beam are respectively connected to the front and rear ends of the two side walls so that the front beam, the rear beam and the two side walls together form a frame structure, wherein a first cavity is provided inside the front beam and / or the rear beam, and the front beam is used for mounting functional components.

[0007] In this solution, the above-mentioned structural form is adopted, and the weight of the front beam and / or the rear beam can be reduced through the first cavity, so that the overall weight of the battery box can be reduced while ensuring that the overall structural strength of the battery pack meets the requirements, and the material used can be reduced, thereby achieving the effect of reducing the weight of the battery pack; and the processing technology is simple and the cost is low. At the same time, the frame structure is formed by the front beam, the rear beam and the two side walls, so as to strengthen the battery box and achieve higher stability. The functional components are installed on the front beam, and the installation is very convenient.

[0008] Preferably, the battery box also includes a mounting seat, a mounting opening is opened on the front beam and / or the rear beam, the mounting seat is embedded in the mounting opening and connected to the frame structure, and the functional component is connected to the mounting seat.

[0009] In the present solution, the above-mentioned structural form is adopted, by embedding the mounting seat into the mounting opening and connecting it to the frame structure, and installing the functional components through the mounting seat, so that the functional components can be firmly installed on the frame structure, thereby ensuring the installation strength requirements of the functional components, thereby effectively improving the connection stability of the overall structure of the battery pack and the seismic performance of the battery pack.

[0010] Preferably, the mounting seat includes a supporting portion and a connecting portion, one end of the supporting portion is connected to the outer edge of the connecting portion, the other end of the supporting portion extends outward along the plate surface direction of the mounting seat, and the supporting portion is against the side of the front beam and / or the rear beam facing away from the battery body, and the connecting portion is embedded in the first cavity and connected to the outer wall of the first cavity close to the battery body.

[0011] In this solution, the above-mentioned structural form is adopted, and the abutting part abuts against the side of the front beam and / or the rear beam facing away from the battery body, so that the mounting seat and the frame structure abut against each other, and the mounting seat can no longer slide into the battery pack, indicating that the mounting seat is installed in place, thereby achieving accurate positioning of the mounting seat. At the same time, after the connecting part is embedded in the first cavity and connected to the outer wall of the first cavity close to the battery body, the mounting seat is firmly connected to the frame structure, the installation connection is very convenient, and the installation stability of the mounting seat can be guaranteed.

[0012] Preferably, the middle area of ​​the mounting seat has a through hole for communicating with the interior of the frame structure, and the mounting seat is provided with a plurality of connecting holes, which are distributed on the outer edge of the through hole. The functional component is detachably connected to the plurality of connecting holes on the mounting seat, and is connected to the front beam and / or the rear beam after passing through the through holes.

[0013] In this solution, the above-mentioned structural form is adopted, and the functional component is conveniently connected to the battery body through the through hole. The functional component passes through the through hole and is connected to multiple connection holes, and the multiple connection holes are distributed on the outer edge of the through hole, so that the functional component can be fixed all around, and the installation connection is stable and reliable. At the same time, it is very convenient to install and disassemble through multiple connection holes, and the structure is simple and the processing and manufacturing are very convenient.

[0014] Preferably, the functional component includes an electrical connector, a thermostatic connector and at least one pressure relief valve, the electrical connector and the thermostatic connector are both connected to the front beam, and at least one pressure relief valve is connected to the front beam and / or the rear beam.

[0015] In this solution, the above-mentioned structural form is adopted, and the electric connector and the thermostatic connector are both connected to the front beam. The electric connector and the thermostatic connector are respectively plugged in or disconnected with the vehicle-end electric connector and the vehicle-end thermostatic connector on the electric vehicle, thereby realizing plugging and disconnecting synchronously, making the plugging between the electric connector and the thermostatic connector and the vehicle-end electric connector and the vehicle-end thermostatic connector on the electric vehicle more stable and reliable, effectively avoiding the problem of unstable connection; and achieving a more compact overall structure of the battery pack. At the same time, by installing a pressure relief valve on the front beam and / or the rear beam, the pressure in the front end and / or the rear end of the battery pack is relieved, effectively preventing the internal pressure of the battery pack from being too high, and having higher safety and stability.

[0016] Preferably, the battery box further comprises a maintenance compartment, the rear beam is provided with a maintenance opening, and the maintenance compartment is detachably connected to the rear beam and is used to seal and cover the maintenance opening.

[0017] In this solution, the above-mentioned structural form is adopted, and the interior of the battery pack can be maintained through the maintenance port, which is convenient for maintenance and inspection; at the same time, the maintenance port is sealed and covered, which has high safety and stability, and the structure is simple and easy to process and manufacture.

[0018] Preferably, the battery box further comprises a fixing member, wherein the fixing member is located in the frame structure and is connected to the front beam, the rear beam and the two side walls.

[0019] In this solution, the above-mentioned structural form is adopted, and the fixing part has a reinforcing effect, further strengthening the structural strength of the battery box, effectively avoiding the deformation of the battery pack, and having high seismic resistance, which greatly improves the safety and stability of the battery pack. At the same time, the fixing part is located in the frame structure, making the structure more compact and not occupying additional space.

[0020] Preferably, the fixing member comprises transverse ribs and longitudinal ribs which are staggered and connected to each other;

[0021] And / or, the fixing member has a second cavity inside.

[0022] In this solution, the above-mentioned structural form is adopted, and the transverse ribs and the longitudinal ribs have an isolation effect, which has higher safety and stability and is convenient for the installation and arrangement of structural components in the battery pack.

[0023] In addition, the second cavity can effectively reduce the weight of the fixings, so that while ensuring that the overall structural strength of the battery pack meets the requirements, the overall weight of the battery box can be reduced and the material used can be reduced, thereby achieving the effect of reducing the weight of the battery pack; and the processing technology is simple and the cost is low.

[0024] Preferably, the battery pack also includes a battery body, and the battery case also includes an upper cover and a bottom plate, and the upper cover and the bottom plate are respectively connected to the top surface and the bottom surface of the frame structure, so that a accommodating cavity for accommodating the battery body is formed between the bottom plate, the frame structure and the upper cover.

[0025] In this solution, the above-mentioned structural form is adopted to place the battery body in the accommodating cavity, so that the battery box is completely sealed and covers the battery body, effectively preventing external impurities from entering the battery pack and causing damage to the battery body, and having higher safety and stability.

[0026] Preferably, the battery box further comprises a temperature regulating member, which is arranged on the upper cover and / or the bottom plate and is used to regulate the temperature in the accommodating cavity;

[0027] And / or, the battery box further comprises a reinforcing member disposed between the temperature regulating member and the bottom plate, one end of the reinforcing member is connected to the bottom plate, and the other end of the reinforcing member extends in a direction close to the battery body, for supporting the battery body;

[0028] And / or, the battery box further includes a buffer component, and the buffer component is arranged between the temperature regulating component and the bottom plate.

[0029] In this solution, the above-mentioned structural form is adopted, and the thermostat can both lower the temperature in the accommodating cavity and raise the temperature in the accommodating cavity, which is conducive to ensuring that the temperature in the accommodating cavity is at a normal temperature, so as to avoid the working state of the battery body and other components in the accommodating cavity being affected by the weather or working environment, thereby ensuring the normal operation and performance stability of the battery body and other components in the accommodating cavity, and improving the safety and service life of the battery body and other components in the accommodating cavity. Especially when facing extremely cold or extremely hot weather, the thermostat can reduce the impact of the external temperature on the battery pack, which is conducive to increasing the use scenarios of the battery pack and improving the versatility of the battery pack. When both the upper cover and the bottom plate are provided with thermostats, it is conducive to ensuring the uniformity of the temperature regulation of the battery pack, thereby ensuring the functional integrity of the battery pack and improving the service life of the battery pack. At the same time, the thermostat is arranged on the upper cover and / or the bottom plate instead of being arranged inside the battery body, so that the thermostat does not occupy the space resources of the battery body, and the battery body capacity in the accommodating cavity is further increased, the driving range of the electric vehicle is increased, and the structure is more compact and occupies less space.

[0030] By reinforcing the bottom plate with reinforcement pieces, the strength of the bottom plate is improved, thereby reducing the risk of the bottom plate being crushed by the battery body, improving the strength and stability of the bottom plate in supporting the battery body, and further improving the stability and reliability of the placement of the battery body.

[0031] The buffer component can provide buffering for the battery body to prevent the battery body from being damaged by collision during transportation, thereby further improving the safety and service life of the battery body.

[0032] Preferably, the reinforcing member is arranged at a position corresponding to the frame structure and / or the fixing member on the bottom plate, and extends in a direction away from the frame structure and / or the fixing member.

[0033] In this solution, the above-mentioned structural form is adopted, and the connection between the bottom plate and the frame structure and the corresponding position of the fixing member are strengthened by the reinforcement member, thereby improving the structural strength of the battery box body.

[0034] Preferably, a sealing groove for accommodating sealant is provided on the top surface of the frame structure, the sealing groove is arranged around the frame structure, and the upper cover is bonded to the top surface of the frame structure by the sealant.

[0035] In this solution, the above-mentioned structural form is adopted, so that the upper cover is bonded to the top surface of the frame structure by sealant, and a sealed connection between the upper cover and the frame structure is achieved by the sealant, with good sealing effect; at the same time, the sealing groove effectively avoids the overflow of the sealant, and the stability is higher.

[0036] Preferably, the battery pack further comprises a plurality of lock connection structures, and the plurality of lock connection structures are arranged at intervals along the length direction of the side wall on a side of the side wall facing away from the battery body.

[0037] In the present solution, the above-mentioned structural form is adopted, and the installation connection of the battery pack is achieved through a plurality of locking connection structures arranged at intervals, and the connection stability is higher.

[0038] An electric vehicle comprises the battery pack as described above.

[0039] In this solution, the above-mentioned structural form is adopted to reinforce the battery box and achieve higher stability. The functional components are installed on the front beam, which is very convenient to install. At the same time, while ensuring that the overall structural strength of the battery pack meets the requirements, the overall weight of the battery box is reduced, the material used is reduced, and the weight of the battery pack is reduced; and the processing technology is simple and the cost is low.

[0040] On the basis of conforming to the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present utility model.

[0041] The positive and progressive effects of the utility model are:

[0042] The battery pack of the utility model and the electric vehicle including the same form a frame structure by enclosing a front beam, a rear beam and two side walls, and the interior of the front beam and / or the rear beam has a first cavity, so that the overall weight of the battery box is reduced and the material is reduced while ensuring that the overall structural strength of the battery pack meets the requirements, thereby achieving the effect of reducing the weight of the battery pack; and the processing technology is simple and the cost is low. At the same time, the functional components are installed on the front beam, and the installation is very convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic diagram of the three-dimensional structure of a battery pack according to an embodiment of the utility model.

[0044] Figure 2 This is a schematic diagram of the three-dimensional structure of the battery pack according to an embodiment of the utility model from another perspective.

[0045] Figure 3 It is a partial enlarged schematic diagram of a battery pack according to an embodiment of the utility model.

[0046] Figure 4 It is a schematic diagram of the internal structure of the battery box of an embodiment of the utility model.

[0047] Figure 5 It is a schematic diagram of the internal structure of the battery box at the electrical connector of an embodiment of the utility model.

[0048] Figure 6 It is a schematic diagram of the cross-sectional structure of the battery box along the longitudinal direction of an embodiment of the utility model.

[0049] Figure 7 for Figure 6 Schematic diagram of the local three-dimensional structure.

[0050] Figure 8 It is a schematic structural diagram of the upper cover of an embodiment of the utility model.

[0051] Fig. 9 It is a structural schematic diagram of the bottom plate of an embodiment of the utility model.

[0052] Description of reference numerals:

[0053] Battery box 1, front beam 11, first cavity 111, installation port 112, rear beam 12, maintenance port 121, side wall 13, mounting seat 14, abutment portion 141, connection portion 142, through hole 143, connection hole 144, maintenance compartment 15, fixing member 16, longitudinal rib 161, transverse rib 162, second cavity 163, sealing groove 17, upper cover 18, bottom plate 19, temperature regulating member 20, buffer member 21, reinforcement member 22, functional component 3, electrical connector 31, temperature regulating connector 32, pressure relief valve 33, lock connection structure 4 DETAILED DESCRIPTION

[0054] The present invention will be described more clearly and completely below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the following embodiments.

[0055] The utility model discloses an electric vehicle, which includes a battery pack, which is detachably mounted on the bottom of the electric vehicle. The battery pack can be removed for charging, and after the battery pack is fully charged, the battery pack is mounted on the bottom of the electric vehicle. Figures 1 to 7 As shown, the battery pack includes a battery case 1 and a battery body, and the battery body is installed in the battery case 1.

[0056] The battery box 1 includes a front beam 11, a rear beam 12 and two side walls 13. The front beam 11 and the rear beam 12 are respectively connected to the front and rear ends of the two side walls 13, so that the front beam 11, the rear beam 12 and the two side walls 13 are surrounded to form a frame structure. The front beam 11 and / or the rear beam 12 have a first cavity 111 inside, and the front beam 11 is used to install the functional component 3. The front beam 11 and / or the rear beam 12 have a first cavity 111 inside, and the weight of the front beam 11 and / or the rear beam 12 can be reduced by the first cavity 111, so that the overall weight of the battery box 1 is reduced and the material is reduced while ensuring that the overall structural strength of the battery pack meets the requirements, thereby achieving the effect of reducing the weight of the battery pack; and the processing technology is simple and the cost is low. At the same time, the frame structure is formed by the front beam 11, the rear beam 12 and the two side walls 13, so as to strengthen the battery box 1 and achieve higher stability. The functional component 3 is installed on the front beam 11, and the installation is very convenient.

[0057] like Figure 1 and Figure 2As shown, the functional component 3 includes an electric connector 31, a thermostatic connector 32 and at least one pressure relief valve 33. The electric connector 31 and the thermostatic connector 32 are both connected to the front beam 11, and at least one pressure relief valve 33 is connected to the front beam 11 and / or the rear beam 12. The electric connector 31 and the thermostatic connector 32 are both connected to the front beam 11. When the battery pack moves along its length direction, the electric connector 31 and the thermostatic connector 32 are respectively plugged in or disconnected from the vehicle-end electric connector and the vehicle-end thermostatic connector on the electric vehicle. When plugged in, the battery pack provides power to the electric vehicle and cools the battery pack. Thus, plugging and disconnecting are realized synchronously, so that the plugging between the electric connector 31 and the thermostatic connector 32 and the vehicle-end electric connector and the vehicle-end thermostatic connector on the electric vehicle is more stable and reliable, effectively avoiding the problem of unstable connection; and realizing a more compact overall structure of the battery pack. At the same time, by installing a pressure relief valve 33 on the front beam 11 and / or the rear beam 12, the pressure in the front end and / or the rear end of the battery pack is relieved, which effectively prevents excessive pressure inside the battery pack and improves safety and stability.

[0058] In this embodiment, there are four pressure relief valves 33 , two of which are located on the front beam 11 and the rear beam 12 , respectively, and every two pressure relief valves 33 are distributed at both ends of the front beam 11 and the rear beam 12 , further improving the safety and stability of the battery pack.

[0059] like Figure 3 and Figure 5 As shown, the battery box 1 further includes a mounting seat 14, a mounting opening 112 is provided on the front beam 11 and / or the rear beam 12, the mounting seat 14 is embedded in the mounting opening 112 and connected to the frame structure, and the functional component 3 is connected to the mounting seat 14. By embedding the mounting seat 14 in the mounting opening 112 and connecting it to the frame structure, and installing the functional component 3 through the mounting seat 14, the functional component 3 is stably mounted on the frame structure, the installation strength requirement of the functional component 3 is guaranteed, thereby effectively improving the connection stability of the overall structure of the battery pack and the anti-seismic performance of the battery pack.

[0060] The mounting seat 14 includes a supporting portion 141 and a connecting portion 142. One end of the supporting portion 141 is connected to the outer edge of the connecting portion 142, and the other end of the supporting portion 141 extends outward along the plate surface direction of the mounting seat 14. The supporting portion 141 is supported by the side of the front beam 11 and / or the rear beam 12 facing away from the battery body. The connecting portion 142 is embedded in the first cavity 111 and connected to the outer wall of the first cavity 111 close to the battery body. The mounting seat 14 is embedded in the mounting opening 112 from the outside of the battery pack along the length direction of the battery pack. The supporting portion 141 is supported by the side of the front beam 11 and / or the rear beam 12 facing away from the battery body, so that the mounting seat 14 and the frame structure are in contact with each other, and the mounting seat 14 can no longer slide into the battery pack, indicating that the mounting seat 14 is installed in place, thereby achieving accurate positioning of the mounting seat 14. At the same time, after the connecting portion 142 is embedded in the first cavity 111, it is connected to the outer wall of the first cavity 111 close to the battery body, so that the mounting seat 14 is firmly connected to the frame structure, the installation connection is very convenient, and the installation stability of the mounting seat 14 can be ensured. Among them, one end of the connecting portion 142 away from the abutting portion 141 is connected to the frame structure. The abutting portion 141 can also be connected to the frame structure, effectively strengthening the structural connection strength.

[0061] The middle area of ​​the mounting seat 14 has a through hole 143 for communicating with the inside of the frame structure. The mounting seat 14 is provided with a plurality of connection holes 144, which are distributed on the outer edge of the through hole 143. The functional component 3 is detachably connected to the plurality of connection holes 144 on the mounting seat 14, and is connected to the front beam 11 and / or the rear beam 12 after passing through the through hole 143. The functional component 3 passes through the through hole 143 from the outside of the battery pack and extends into the battery pack. The through hole 143 makes it easy for the functional component 3 to pass through the battery box 1 and connect to the battery body. The functional component 3 passes through the through hole 143 and is connected to the plurality of connection holes 144, which are distributed on the outer edge of the through hole 143, so that the functional component 3 is fixed all around, and the installation connection is stable and reliable. At the same time, it is very convenient to install and disassemble through the plurality of connection holes 144, and the structure is simple and the processing and manufacturing are very convenient.

[0062] like Figure 4 As shown, the battery box 1 also includes a maintenance compartment 15, and the rear beam 12 is provided with a maintenance port 121. The maintenance compartment 15 is detachably connected to the rear beam 12 and is used to seal and cover the maintenance port 121. When the battery pack needs to be maintained, the maintenance compartment 15 can be removed from the rear beam 12, and the interior of the battery pack can be maintained through the maintenance port 121, which is convenient for maintenance and inspection. After maintenance and inspection, the maintenance compartment 15 is installed and connected to the rear beam 12, so as to seal and cover the maintenance port 121, which has high safety and stability, simple structure, and convenient processing and manufacturing.

[0063] The battery box 1 also includes a fixing member 16, which is located in the frame structure and connected to the front beam 11, the rear beam 12 and the two side walls 13. The fixing member 16 has a reinforcing function. By connecting the fixing member 16 to the front beam 11, the rear beam 12 and the two side walls 13, the structural strength of the battery box 1 is further strengthened, and the deformation of the battery pack is effectively avoided. The anti-seismic performance is high, and the safety and stability of the battery pack are greatly improved. At the same time, the fixing member 16 is located in the frame structure, which makes the structure more compact and does not occupy additional space.

[0064] The fixing member 16 includes transverse ribs 162 and longitudinal ribs 161 that are interlaced and connected to each other. The transverse ribs 162 and longitudinal ribs 161 are respectively connected to the front beam 11, the rear beam 12 and the two side walls 13, and the transverse ribs 162 and longitudinal ribs 161 are intersected and connected to each other, thereby effectively strengthening the internal structural strength of the battery pack; and the transverse ribs 162 and longitudinal ribs 161 have an isolation effect, with higher safety and stability, and are convenient for the installation and arrangement of structural components in the battery pack.

[0065] like Figure 4 , Figure 6 and Figure 7 As shown, the fixing member 16 has a second cavity 163 inside. The second cavity 163 can effectively reduce the weight of the fixing member 16, so that the overall weight of the battery box 1 can be reduced while ensuring that the overall structural strength of the battery pack meets the requirements, and the material used can be reduced, thereby achieving the effect of reducing the weight of the battery pack; and the processing technology is simple and the cost is low.

[0066] like Figure 3 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig. 9 As shown, the battery case 1 also includes an upper cover 18 and a bottom plate 19, which are respectively connected to the top and bottom surfaces of the frame structure, so that a receiving cavity for receiving the battery body is formed between the bottom plate 19, the frame structure and the upper cover 18. The battery body is placed in the receiving cavity, and the frame structure is used to surround the battery body on all sides. The upper cover 18 and the bottom plate 19 are respectively used to cover the upper and lower ends of the battery body, so that the battery case 1 is completely sealed and covers the battery body, effectively preventing external impurities from entering the battery pack and causing damage to the battery body, and having higher safety and stability. Preferably, the fixing member 16 can be connected to the upper cover 18 and the bottom plate 19 to further strengthen the overall structural strength of the battery case 1.

[0067] The top surface of the frame structure is provided with a sealing groove 17 for accommodating the sealant. The sealing groove 17 is arranged around the frame structure, and the upper cover 18 is bonded to the top surface of the frame structure through the sealant. The top surface of the frame structure is provided with a circle of sealing grooves 17, and the sealant is arranged in the sealing grooves 17, so that the upper cover 18 is bonded to the top surface of the frame structure through the sealant, and the sealing connection between the upper cover 18 and the frame structure is achieved through the sealant, and the sealing effect is good; at the same time, the sealant is effectively prevented from overflowing through the sealing grooves 17, and the stability is higher.

[0068] Optionally, the top surface of the frame structure has a plurality of sealing grooves 17 for accommodating sealant, and the plurality of sealing grooves 17 are arranged around the frame structure. Alternatively, the top surface of the frame structure has a sealing groove 17 for accommodating sealant, and the sealing groove 17 is arranged around the frame structure, for example, the sealing groove 17 is a round-shaped sealing groove, and the round-shaped sealing groove is arranged around the frame structure.

[0069] like Figure 1 , Figure 8 and Fig. 9 As shown, in this embodiment, the battery case 1 also includes a thermostat 20, which is arranged on the upper cover 18 and the bottom plate 19, and is used to adjust the temperature in the accommodating chamber. The thermostat 20 can be connected to the thermostat connector 32, so that the coolant flows into the thermostat 20 through the thermostat connector 32. The thermostat 20 can both lower the temperature in the accommodating chamber and increase the temperature in the accommodating chamber, which is conducive to ensuring that the temperature in the accommodating chamber is at a normal temperature, so as to avoid the working state of the battery body and other components in the accommodating chamber being affected by the weather or working environment, thereby ensuring the normal operation and performance stability of the battery body and other components in the accommodating chamber, and improving the safety and service life of the battery body and other components in the accommodating chamber. In particular, when facing extremely cold or extremely hot weather, the thermostat 20 can reduce the influence of the external temperature on the battery pack, which is conducive to increasing the use scenarios of the battery pack and improving the versatility of the battery pack. When both the upper cover 18 and the bottom plate 19 are provided with the thermostat 20, it is conducive to ensuring the uniformity of the temperature regulation of the battery pack, thereby ensuring the functional integrity of the battery pack and improving the service life of the battery pack. At the same time, the thermostat 20 is arranged on the upper cover 18 and / or the bottom plate 19 instead of being arranged inside the battery body, so that the thermostat 20 does not occupy the space resources of the battery body, and the battery body capacity in the accommodating cavity is further increased, the driving range of the electric vehicle is increased, and the structure is more compact and occupies less space. Of course, in other embodiments, the thermostat 20 can be only on the upper cover 18 or only on the bottom plate 19.

[0070] like Figure 7 , Figure 8 and Fig. 9As shown, the thermostat 20 includes a thermostat plate, on which a flow channel is provided, and the flow channel is used to circulate the thermostat medium, so that when the thermostat medium circulates in the flow channel, the surface temperature of the upper cover 18 and the bottom plate 19 can be reduced or increased, so as to reduce or increase the temperature in the accommodating cavity. In addition, the thermostat 20 is configured in a plate shape, which will not occupy too much space in the height direction of the battery case 1, which is conducive to ensuring that the size of the battery case 1 is within a reasonable range. The thermostat connector 32 is connected to the flow channel of the thermostat 20 through a connecting pipe, so as to control the working mode of the thermostat connector 32 to a liquid cooling mode or a heating mode according to the actual application scenario, so as to control the temperature of the thermostat medium in the flow channel through the thermostat connector 32, so as to reduce or increase the temperature in the accommodating cavity. Among them, the thermostat medium can be a liquid or a gas or other thermostatic medium.

[0071] The battery case 1 also includes a reinforcing member 22 disposed between the thermostat 20 and the bottom plate 19, one end of the reinforcing member 22 is connected to the bottom plate 19, and the other end of the reinforcing member 22 extends toward the direction close to the battery body, for supporting the battery body. The reinforcing member 22 has high structural strength. The reinforcing member 22 is disposed between the thermostat 20 and the bottom plate 19, and the bottom plate 19 can be reinforced by the reinforcing member 22, thereby improving the strength of the bottom plate 19, thereby reducing the risk of the bottom plate 19 being crushed by the battery body, improving the strength and stability of the bottom plate 19 supporting the battery body, and thus improving the stability and reliability of the placement of the battery body.

[0072] like Figure 6 as well as Figure 7 As shown, the reinforcement 22 is arranged at the corresponding position of the frame structure and / or the fixing member 16 on the bottom plate 19, and extends in the direction away from the frame structure and / or the fixing member 16. Specifically, the frame structure is located at the outer edge of the bottom plate 19, and the reinforcement 22 is arranged at the outer edge of the bottom plate 19 and at the corresponding position of the frame structure. The bottom plate 19, the reinforcement 22 and the frame structure are connected, so that the installation connection strength between the bottom plate 19 and the frame structure is effectively strengthened by the reinforcement 22, and the safety and stability are higher. At the same time, the reinforcement 22 is arranged at the corresponding position of the fixing member 16 on the bottom plate 19, and the projection of the fixing member 16 in the height direction of the battery pack, the reinforcement 22 can cover the fixing member 16, and the bottom plate 19, the reinforcement 22 and the fixing member 16 are connected, so that the installation connection strength between the bottom plate 19 and the fixing member 16 is effectively strengthened by the reinforcement 22, and the safety and stability are higher.

[0073] The setting position of the reinforcement 22 can be implemented in the following ways. In the first way, the reinforcement 22 is set at the corresponding position of the frame structure on the bottom plate 19; in the second way, the reinforcement 22 is set at the corresponding position of the fixing member 16 on the bottom plate 19, specifically, the reinforcement 22 can be set at the corresponding position of the transverse rib 162 on the bottom plate 19; in the third way, the reinforcement 22 is set at the corresponding position of the frame structure on the bottom plate 19, and the reinforcement 22 is set at the corresponding position of the fixing member 16 on the bottom plate 19. Preferably, the reinforcement 22 is set at the corresponding position of the frame structure and the fixing member 16 on the bottom plate 19, and extends in the direction away from the frame structure and the fixing member 16. With the above-mentioned structural form, a plurality of reinforcements 22 are arranged at intervals along the extension direction of the bottom plate 19, which further improves the strength of the bottom plate 19, thereby improving the strength and stability of the bottom plate 19 supporting the battery body, and further improving the stability and reliability of the battery body placed in the accommodating cavity. In addition, the connection between the bottom plate 19 and the frame structure and the corresponding position of the fixing member 16 are reinforced by the reinforcement member 22, thereby improving the structural strength of the battery box body.

[0074] like Figure 6 and Figure 7 As shown, the battery box 1 also includes a buffer 21, which is arranged between the temperature regulating member 20 and the bottom plate 19. The buffer 21 can provide a buffer for the battery body to prevent the battery body from being damaged by collision during transportation, thereby further improving the safety and service life of the battery body. The buffer 21 can be a buffer foam, and the material of the buffer 21 can be adjusted according to actual needs, and is not limited here.

[0075] In a specific embodiment, Figure 6 As shown, the lower plate structure of the battery box 1 includes: a bottom plate 19 at the lower layer, a buffer 21 and a reinforcement 22 at the middle layer, and a thermostat 20 at the upper layer, wherein the lower side of the thermostat 20 is respectively connected to the reinforcement 22 and the end of the buffer 21 away from the bottom plate 19, and the upper side of the thermostat 20 is connected to the battery body. The reinforcement 22 is laid on the bottom plate 19 at the corresponding position of the frame structure and the fixing member 16, and extends in the direction away from the frame structure and the fixing member 16. The buffer 21 is laid between adjacent reinforcements 22 on the bottom plate 19.

[0076] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the battery pack further includes a plurality of lock connection structures 4, which are arranged at intervals along the length direction of the side wall 13 on the side of the side wall 13 facing away from the battery body. The battery pack is mounted and connected to the locking mechanism at the bottom of the electric vehicle through the plurality of lock connection structures 4, so that the battery pack is installed and connected to the bottom of the electric vehicle. The plurality of lock connection structures 4 are arranged at intervals along the length direction of the side wall 13 on the side of the side wall 13 facing away from the battery body, and the battery pack is installed and connected through the plurality of lock connection structures 4 arranged at intervals, and the connection stability is higher.

[0077] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A battery pack, characterized in that: The battery pack includes a battery box, which includes a front beam, a rear beam and two side walls. The front beam and the rear beam are respectively connected to the front and rear ends of the two side walls so that the front beam, the rear beam and the two side walls together form a frame structure. The front beam and / or the rear beam have a first cavity inside, and the front beam is used to install functional components.

2. The battery pack according to claim 1, characterized in that: The battery box also includes a mounting seat, a mounting opening is opened on the front beam and / or the rear beam, the mounting seat is embedded in the mounting opening and connected to the frame structure, and the functional component is connected to the mounting seat.

3. The battery pack according to claim 2, characterized in that: The mounting seat includes a supporting portion and a connecting portion, one end of the supporting portion is connected to the outer edge of the connecting portion, the other end of the supporting portion extends outward along the plate surface direction of the mounting seat, and the supporting portion is against the side of the front beam and / or the rear beam facing away from the battery body, and the connecting portion is embedded in the first cavity and connected to the outer wall of the first cavity close to the battery body.

4. The battery pack according to claim 2, characterized in that: The middle area of ​​the mounting seat has a through hole for communicating with the interior of the frame structure. The mounting seat is provided with a plurality of connecting holes, which are distributed on the outer edge of the through hole. The functional component is detachably connected to the plurality of connecting holes on the mounting seat, and is connected to the front beam and / or the rear beam after passing through the through holes.

5. The battery pack according to claim 1, wherein: The functional component comprises an electrical connector, a thermostatic connector and at least one pressure relief valve, wherein the electrical connector and the thermostatic connector are both connected to the front beam, and at least one pressure relief valve is connected to the front beam and / or the rear beam; And / or, the battery box further comprises a maintenance compartment, the rear beam is provided with a maintenance opening, and the maintenance compartment is detachably connected to the rear beam and is used to seal and cover the maintenance opening.

6. The battery pack according to claim 1, wherein: The battery box also includes a fixing member, which is located in the frame structure and connected to the front beam, the rear beam and the two side walls.

7. The battery pack according to claim 6, characterized in that: The fixing member comprises transverse ribs and longitudinal ribs which are staggered and connected to each other; And / or, the fixing member has a second cavity inside.

8. The battery pack according to claim 1, wherein: The battery pack also includes a battery body, and the battery case also includes an upper cover and a bottom plate, wherein the upper cover and the bottom plate are respectively connected to the top surface and the bottom surface of the frame structure, so that a receiving cavity for receiving the battery body is formed between the bottom plate, the frame structure and the upper cover.

9. The battery pack according to claim 8, characterized in that: The battery box body further comprises a temperature regulating component, which is arranged on the upper cover and / or the bottom plate and is used to regulate the temperature in the accommodating cavity.

10. The battery pack according to claim 9, characterized in that: The battery box further includes a reinforcing member disposed between the temperature regulating member and the bottom plate, one end of the reinforcing member being connected to the bottom plate, and the other end of the reinforcing member extending in a direction close to the battery body, for supporting the battery body; And / or, the battery box further includes a buffer component, and the buffer component is arranged between the temperature regulating component and the bottom plate.

11. The battery pack according to claim 10, characterized in that: The reinforcing member is arranged at a position corresponding to the frame structure and / or the fixing member on the bottom plate, and extends in a direction away from the frame structure and / or the fixing member.

12. The battery pack according to claim 8, characterized in that: The top surface of the frame structure is provided with a sealing groove for accommodating a sealant, the sealing groove is arranged around the frame structure, and the upper cover is bonded to the top surface of the frame structure through the sealant.

13. The battery pack according to claim 1, wherein: The battery pack further comprises a plurality of lock connection structures, which are arranged at intervals along the length direction of the side wall on a side of the side wall facing away from the battery body.

14. An electric vehicle, characterized in that: It comprises a battery pack as described in any one of claims 1-13.

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