Battery pack and electric automobile comprising same

Abstract

The utility model discloses a battery pack and including the electromobile, the battery pack includes the battery box body, the battery box body includes the upper cover, bottom plate and is used for accommodating the accommodation cavity of functional part, the upper cover and / or bottom plate is provided with the opening, the opening is communicated with the accommodation cavity, and the battery box body is provided with the upper cover and the bottom plate. The upper cover and / or the bottom plate are / is detachably connected with a sealing cover, and the sealing cover is used for sealing or opening the opening. When functional parts in the battery box body need to be maintained or replaced, the sealing cover can be detached, and the functional parts are maintained and replaced from the opening, so that the upper cover and / or the bottom plate do not need to be detached, the workload of later maintenance is favorably reduced, and the maintenance efficiency is improved. Particularly, when the upper cover and / or the bottom plate are / is fixed in a bonding manner, the opening can solve the problem that the upper cover and / or the bottom plate cannot be detached or the fixing effect is poor after the upper cover and / or the bottom plate are / is detached, and the performance integrity of the maintained battery pack is guaranteed.

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] In the prior art, when a battery pack needs to be repaired, it is usually necessary to disassemble the battery box of the battery pack to expose the internal structure of the battery pack to the outside for easy repair or replacement of parts. However, such operation is cumbersome and is not conducive to improving the maintenance efficiency of the battery pack. In particular, when the battery box and the battery body are fixedly bonded, there is a problem of difficulty in disassembly or poor fixing effect after disassembly. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the defect of low efficiency of later maintenance of battery packs in the prior art, and to provide a battery pack and an electric vehicle comprising the same.

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

[0006] A battery pack comprises a battery case, wherein the battery case comprises an upper cover, a bottom plate and a receiving cavity for receiving functional parts, wherein the upper cover and / or the bottom plate are provided with an opening, wherein the opening is communicated with the receiving cavity, and a closing cover is detachably connected to the upper cover and / or the bottom plate, wherein the closing cover is used to close or open the opening.

[0007] In this solution, an opening connected to the accommodating cavity is provided on the upper cover and / or the bottom plate of the battery box, and the opening and closing of the opening is controlled by a detachable closing cover. When the functional parts in the battery box need to be repaired or replaced, the closing cover can be removed, and the functional parts can be repaired and replaced from the opening. In this way, the upper cover and / or the bottom plate do not need to be removed, which is conducive to reducing the workload of the later maintenance of the battery pack and improving the efficiency of the later maintenance of the battery pack. In particular, when the upper cover and / or the bottom plate are fixed by adhesive fixation, the provision of the opening can solve the problem that the upper cover and / or the bottom plate cannot be removed or the fixing effect is poor after removal, which is conducive to ensuring the performance integrity of the battery pack after repair.

[0008] Preferably, the functional part includes an electrical connector and a thermostatic connector, and the opening includes a first opening, and a position of the first opening corresponds to positions of the electrical connector and the thermostatic connector;

[0009] And / or, the functional part includes a control panel, the opening includes a second opening, and a position of the second opening corresponds to a position of the control panel.

[0010] In the present solution, different openings are set corresponding to different functional parts in a targeted manner, and the openings correspond to the positions of the functional parts. On the one hand, it can improve the convenience of repair and replacement and further improve the maintenance efficiency. On the other hand, compared with a single opening that has greater requirements on size in order to meet the maintenance of multiple functional parts, multiple openings are arranged on the battery box in a more dispersed manner, which is beneficial to ensure the structural strength of the battery box.

[0011] Preferably, the battery box further comprises a first sealing member disposed between the closing cover and the upper cover, and / or a second sealing member disposed between the closing cover and the bottom plate;

[0012] The first sealing member is used to fill the gap between the closing cover and the upper cover, and the second sealing member is used to fill the gap between the closing cover and the bottom plate.

[0013] In the present solution, the above-mentioned structural form is adopted, which is beneficial to improving the connection sealing between the closing cover and the upper cover and / or the bottom plate, preventing external dust or liquid from entering the accommodating cavity through the opening, and is beneficial to ensuring the safety of the battery pack and improving the service life of the battery pack.

[0014] Preferably, the battery box 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.

[0015] In this solution, the thermostat can both lower the temperature in the accommodating cavity and raise the temperature in the accommodating cavity, which is helpful to ensure that the temperature in the accommodating cavity is at a normal temperature, thereby avoiding affecting the normal operation and performance stability of the components in the accommodating cavity. Especially when facing extremely cold or hot weather, the thermostat can reduce the impact of the external temperature on the battery pack, which is helpful to increase the use scenarios of the battery pack and improve the versatility of the battery pack. When both the upper cover and the bottom plate are provided with thermostats, it is helpful to ensure the uniformity of the temperature regulation of the battery pack, thereby ensuring the functional integrity of the battery pack and increasing the service life of the battery pack.

[0016] Preferably, the temperature regulating element comprises a temperature regulating plate, and a flow channel is provided on the temperature regulating plate, and the flow channel is used for circulating the temperature regulating medium;

[0017] The inlet and the outlet of the flow channel are respectively provided with connecting pipes, and the battery pack also includes a temperature regulating connector, and the temperature regulating connector is connected to the flow channel through the connecting pipe.

[0018] In this solution, when the temperature regulating medium flows in the flow channel, the surface temperature of the upper cover and the bottom plate can be lowered or raised to achieve lowering or raising the temperature in the receiving cavity. In addition, the temperature regulating element is set in a plate shape, which will not occupy too much space in the height direction of the battery box, which is conducive to ensuring that the size of the battery box is within a reasonable range; the temperature regulating connector is connected to the flow channel of the temperature regulating element through a connecting pipe, so as to control the working mode of the temperature regulating connector to liquid cooling mode or heating mode according to the actual application scenario, so as to control the temperature of the temperature regulating medium in the flow channel through the temperature regulating connector, thereby achieving lowering or raising the temperature in the receiving cavity.

[0019] In addition, the inlet and outlet of the flow channel are respectively provided with connecting pipes, and the two connecting pipes can respectively realize the inflow and discharge of the temperature control medium, that is, the inflow and discharge of the temperature control medium can be carried out simultaneously, so that the temperature control medium can be continuously transported to the flow channel to replace the temperature control medium originally in the flow channel, thereby realizing that the temperature control component continuously controls the temperature of the accommodating cavity.

[0020] Preferably, the temperature regulating plate comprises a plate body and a protection plate, and the plate body is laid on the upper cover and / or the bottom plate;

[0021] The flow channel is provided on a side of the plate body facing away from the upper cover or the bottom plate, and the flow channel is recessed toward the upper cover or the bottom plate;

[0022] The protection plate at least covers the recessed area on the plate body to form the closed flow channel.

[0023] In this solution, the plate body and the protective plate together form a closed flow channel, which is conducive to preventing the temperature control medium from overflowing. At the same time, the temperature control plate is formed by assembling the separate plate body and the protective plate, which is conducive to improving the convenience during manufacturing. If a closed flow channel is directly opened in the integral temperature control plate, the manufacturing difficulty is high.

[0024] Preferably, the battery pack also includes a battery body arranged in the accommodating cavity, the inlet and outlet of the flow channel are located on the same side of the temperature regulating plate, and the flow channel is arranged from the inlet around at least the top and / or bottom of the battery body to reach the outlet.

[0025] In this solution, the above-mentioned structural form can be used to adjust the temperature of the battery body through the temperature regulating medium, which is conducive to ensuring that the temperature of the battery body is normal during use, ensuring the safety of the battery pack and increasing the service life of the battery pack. Among them, the inlet and outlet of the flow channel are located on the same side of the temperature regulating plate, which is conducive to increasing the flow path of the flow channel, making the area of ​​the temperature regulating medium flow wider, and improving the heat dissipation efficiency.

[0026] Preferably, the battery pack also includes a battery body arranged in the accommodating cavity, and the battery case also includes a reinforcement member arranged between the temperature regulating member and the bottom plate, one end of the reinforcement member is connected to the bottom plate, and the other end of the reinforcement member extends in a direction close to the battery body for supporting the battery body.

[0027] In this solution, the battery body is protected by the accommodating cavity, which increases the service life of the battery body, and the above form can assemble the battery pack into an integral module, which is convenient for the subsequent installation of the battery pack in the form of a module. The bottom plate is strengthened by the reinforcement member, which increases the strength of the bottom plate, thereby reducing the risk of the bottom plate being crushed by the battery body, and increases the strength and stability of the bottom plate supporting the battery body, thereby improving the stability and reliability of the battery body placed in the accommodating cavity.

[0028] Preferably, the battery box further comprises a buffer component, and the buffer component is arranged between the temperature regulating component and the bottom plate.

[0029] In this solution, 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.

[0030] Preferably, the battery box also includes a front beam, a rear beam and two side walls, and 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 side walls together form a frame structure, and the upper cover and the bottom plate are respectively covered on the top and bottom surfaces of the frame structure.

[0031] In this solution, the frame structure enables the battery box to have good structural strength, and the upper cover, the bottom plate and the frame structure together form a receiving cavity for accommodating functional parts and the battery body.

[0032] Preferably, the front beam and / or the rear beam is provided with the opening communicated with the accommodating cavity, and the closing cover is detachably connected to the front beam and / or the rear beam for closing or opening the opening.

[0033] In this solution, when functional parts need to be repaired or replaced, the openings of the front beam and / or rear beam can play an auxiliary role, for example, increasing the viewing angle, increasing the operating space, etc., thereby improving the subsequent maintenance efficiency of the battery pack.

[0034] Preferably, the battery box further comprises a fixing member, the fixing member is located in the frame structure, and the fixing member is connected to the front beam, the rear beam and the two side walls;

[0035] Preferably, the battery box further comprises a reinforcing member, which is arranged at a corresponding position of 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.

[0036] In this solution, the fixing parts can effectively enhance the structural strength of the battery box, effectively avoid deformation of the battery pack, improve the shock resistance of the battery pack, and greatly improve the safety and stability of the battery pack.

[0037] With respect to the reinforcement member provided on the corresponding position of the frame structure on the bottom plate, the reinforcement member is connected to the frame structure, so that the connection position between the bottom plate and the frame structure can be strengthened by the reinforcement member; with respect to the reinforcement member provided on the corresponding position of the fixing member on the bottom plate, the reinforcement member can cover the fixing member in the projection in the height direction of the battery pack, so that the connection position between the fixing member and the side wall and the bottom plate can be strengthened by the reinforcement member, thereby improving the structural strength of the battery box body.

[0038] Preferably, the top surface of the frame structure has 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 by the sealant.

[0039] In this solution, the bonding method has a good sealing effect, which can effectively prevent external dust or liquid from entering the battery box, which is beneficial to improving the service life of the battery pack. At the same time, the sealing groove is used to contain the sealant, which can effectively prevent the sealant from overflowing and improve the connection stability between the upper cover and the frame structure.

[0040] Preferably, the front beam, the rear beam and the two side walls are all made of profiles, and the front beam, the rear beam and the two side walls have cavities inside.

[0041] In this solution, the above-mentioned structural form is adopted, which is beneficial to reducing the weight and use cost of the battery box.

[0042] An electric vehicle comprises the battery pack as described above.

[0043] In this solution, when the battery pack of the electric vehicle needs to be repaired or replaced, the closed cover of the battery pack can be removed and maintenance can be performed from the opening of the battery pack without removing the upper cover of the battery pack, which is beneficial to reducing the workload of later maintenance of the battery pack and improving the efficiency of later maintenance of the battery pack.

[0044] The positive and progressive effects of the utility model are:

[0045] The utility model provides an opening in communication with the accommodating cavity on the upper cover of the battery box, and uses a detachable closing cover to control the opening and closing of the opening. When the functional parts in the battery box need to be repaired or replaced, the closing cover can be removed, and the functional parts can be repaired and replaced from the opening, so that the upper cover does not need to be removed, which is conducive to reducing the workload of the later maintenance of the battery pack and improving the later maintenance efficiency of the battery pack. In particular, when the upper cover is fixed by bonding, the provision of the opening can solve the problems of the upper cover being unable to be removed or the poor fixing effect of re-fixing after removal, which is conducive to ensuring the performance integrity of the battery pack after repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a schematic structural diagram of a battery pack according to a preferred embodiment of the utility model.

[0047] Figure 2 This is a schematic structural diagram of a battery pack according to a preferred embodiment of the present utility model, in which the sealing cover is hidden.

[0048] Figure 3 This is a schematic structural diagram of the plate body at the upper cover of a preferred embodiment of the utility model.

[0049] Figure 4 The figure is a schematic cross-sectional structure diagram of a temperature regulating plate at an upper cover of a preferred embodiment of the utility model.

[0050] Figure 5 This is a schematic structural diagram of the plate body at the upper cover of a preferred embodiment of the utility model when viewed from the bottom.

[0051] Figure 6 This is a schematic structural diagram of the plate body at the bottom plate of a preferred embodiment of the utility model.

[0052] Figure 7 This is a schematic diagram of the cross-sectional structure of the temperature regulating plate at the bottom plate of a preferred embodiment of the utility model.

[0053] Figure 8 It is a schematic structural diagram of the flow channel of a preferred embodiment of the utility model.

[0054] Fig. 9 This is a schematic structural diagram of a battery box according to a preferred embodiment of the utility model, in which the upper cover is hidden.

[0055] Fig.10 This is a schematic cross-sectional structure diagram of a battery box according to a preferred embodiment of the utility model.

[0056] Fig.11 The structure of the reinforcement member of the preferred embodiment of the utility model is shown in FIG. Figure 1 .

[0057] Fig.12 The structure of the reinforcement member of the preferred embodiment of the utility model is shown in FIG. Figure 2 .

[0058] Fig.13 It is a partial three-dimensional structural schematic diagram of a reinforcement member of a preferred embodiment of the utility model.

[0059] Fig.14 The figure is a schematic cross-sectional view of a battery box according to a preferred embodiment of the present invention.

[0060] Fig.15 for Fig.14 A partial enlarged schematic diagram of point B in the middle.

[0061] Fig.16 This is a schematic structural diagram of a battery pack from another perspective of a preferred embodiment of the utility model.

[0062] Description of reference numerals:

[0063] Battery pack 100, battery box 1, frame structure 11, bottom plate 12, accommodating cavity 14, upper cover 15, opening 151, first opening 1511, second opening 1512, closing cover 152, first sealing member 153, thermostat 16, thermostat plate 161, flow channel 1611, branch 16111, plate body 1612, protection plate 1613, connecting pipe 162, buffer member 17, front beam 18, rear beam 19, side wall 20, reinforcement 2, first reinforcement part 21, first support part 22, first cavity 23, second reinforcement part 24, second support part 25, third reinforcement part 26, protrusion 27, fixing member 4, longitudinal rib 41, transverse rib 42, electrical connector 51, thermostat connector 52. DETAILED DESCRIPTION

[0064] The present invention is further described below by way of embodiments, but the present invention is not limited to the scope of the embodiments.

[0065] like Figure 1-Figure 3 As shown, this embodiment discloses a battery pack 100, which includes a battery case 1, and the battery case 1 includes an upper cover 15, a bottom plate 12 and a receiving cavity 14 for receiving functional parts. The upper cover 15 is provided with an opening 151, and the opening 151 is connected to the receiving cavity 14. A closing cover 152 is detachably connected to the upper cover 15, and the closing cover 152 is used to close or open the opening 151.

[0066] In other embodiments, both the upper cover 15 and the bottom plate 12 may be provided with an opening 151, and both the upper cover 15 and the bottom plate 12 may be detachably connected with a closing cover 152, and the closing cover 152 is used to close or open the opening 151. Of course, only the bottom plate 12 may be provided with an opening 151 and a closing cover 152 for closing or opening the opening 151.

[0067] By setting an opening 151 in communication with the accommodating cavity 14 on the upper cover 15 and / or the bottom plate 12 of the battery case 1, and using a detachable closing cover 152 to control the opening and closing of the opening 151, when the functional parts in the battery case 1 need to be repaired or replaced, the closing cover 152 can be removed, and the functional parts can be repaired and replaced from the opening 151, so that the upper cover 15 does not need to be removed, which is conducive to reducing the workload of the later maintenance of the battery pack 100 and improving the later maintenance efficiency of the battery pack 100. In particular, when the upper cover 15 or the bottom plate 12 is fixed by adhesive fixation, the setting of the opening 151 can solve the problem that the upper cover 15 or the bottom plate 12 cannot be removed or the fixing effect is poor after removal, which is conducive to ensuring the performance integrity of the battery pack 100 after repair.

[0068] like Figure 2 and Figure 3 As shown, the functional parts include an electrical connector 51, a thermostat connector 52 and a control board, and the opening 151 includes a first opening 1511 and a second opening 1512. The position of the first opening 1511 corresponds to the position of the electrical connector 51 and the thermostat connector 52, and the position of the second opening 1512 corresponds to the position of the control board. Different openings 151 are set for different functional parts in a targeted manner, and the openings 151 correspond to the positions of the functional parts. On the one hand, it can improve the convenience of maintenance and replacement, and further improve the maintenance efficiency. On the other hand, compared with a single opening 151 that has a larger size requirement to meet the maintenance of multiple functional parts, multiple openings 151 are relatively dispersedly set on the battery box 1, which is conducive to ensuring the structural strength of the battery box 1.

[0069] Preferably, the size of the opening 151 is not smaller than the size of the functional part, so as to improve the convenience during maintenance or replacement and prevent the situation in which the opening 151 is too small and the operation is restricted.

[0070] In this embodiment, if Figure 2 As shown, the battery case 1 also includes a first seal 153 arranged between the closing cover 152 and the upper cover 15. The first seal 153 is used to fill the gap between the closing cover 152 and the upper cover 15, thereby facilitating the improvement of the connection sealing between the closing cover 152 and the upper cover 15, preventing external dust or liquid from entering the accommodating cavity 14 from the opening 151, and facilitating the safety of the battery pack 100 and improving the service life of the battery pack 100.

[0071] In some embodiments where the bottom plate 12 is provided with an opening 151 and a closing cover 152, the battery box 1 further includes a second sealing member disposed between the closing cover 152 and the bottom plate 12, and the second sealing member is used to fill the gap between the closing cover 152 and the bottom plate 12, thereby facilitating the improvement of the connection sealing between the closing cover 152 and the bottom plate 12. The first sealing member 153 and the second sealing member may be rubber seals, plastic seals, metal seals or other sealing forms.

[0072] like Figure 1 As shown, the battery case 1 also includes a thermostat 16, which is arranged on the upper cover 15 and the bottom plate 12, and is used to adjust the temperature in the accommodating chamber 14. The thermostat 16 can both lower the temperature in the accommodating chamber 14 and raise the temperature in the accommodating chamber 14, which is conducive to ensuring that the temperature in the accommodating chamber 14 is at a normal temperature, thereby avoiding affecting the normal operation and performance stability of the battery body and functional parts in the accommodating chamber 14. In particular, when facing extremely cold or extremely hot weather, the thermostat 16 can reduce the impact of the external temperature on the battery pack 100, which is conducive to increasing the usable scenarios of the battery pack 100 and improving the versatility of the battery pack 100. Among them, the upper cover 15 and the bottom plate 12 are both provided with the thermostat 16, which is conducive to ensuring the uniformity of the temperature regulation of the battery pack 100, thereby ensuring the functional integrity of the battery pack 100 and improving the service life of the battery pack 100. In other embodiments, the thermostat 16 can be set only on the upper cover 15, or the thermostat 16 can be set only on the bottom plate 12.

[0073] like Figure 3 , Figure 4 , Figure 6 and Figure 7As shown, the thermostat 16 includes a thermostat plate 161, and a flow channel 1611 is provided on the thermostat plate 161. The flow channel 1611 is used to circulate the thermostat medium, so that when the thermostat medium circulates in the flow channel 1611, the surface temperature of the upper cover 15 and the bottom plate 12 can be reduced or increased to reduce or increase the temperature in the accommodating cavity 14. In addition, the thermostat 16 is set in a plate shape, which will not occupy too much space in the height direction of the battery box 1, which is conducive to ensuring that the size of the battery box 1 is within a reasonable range. The thermostat connector 52 is connected to the flow channel 1611 of the thermostat 16 through a connecting pipe 162, so as to control the working mode of the thermostat connector 52 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 1611 through the thermostat connector 52, so as to reduce or increase the temperature in the accommodating cavity 14. Among them, the thermostat medium can be a liquid or a gas or other thermostat medium.

[0074] like Figure 5 As shown, the inlet and outlet of the flow channel 1611 are respectively provided with connecting pipes 162, and the temperature regulating connector 52 is connected to the flow channel 1611 through the connecting pipes 162, so that the external temperature regulating medium is sequentially passed into the flow channel 1611 through the temperature regulating connector 52 and the connecting pipe 162 to adjust the temperature of the accommodating chamber 14. Among them, the inlet and outlet of the flow channel 1611 are respectively provided with connecting pipes 162, and the two connecting pipes 162 can respectively achieve the inflow and discharge of the temperature regulating medium, that is, the inflow and discharge of the temperature regulating medium can be carried out at the same time, which also realizes that the temperature regulating medium can be continuously transported to the flow channel 1611 to replace the temperature regulating medium originally in the flow channel 1611, so that the temperature regulating element 16 can continuously adjust the temperature of the accommodating chamber 14.

[0075] like Figure 4 As shown, the temperature regulating plate 161 includes a plate body 1612 and a protective plate 1613. The plate body 1612 is laid on the upper cover 15 and the bottom plate 12. A flow channel 1611 is provided on the side of the plate body 1612 facing away from the upper cover 15 or the bottom plate 12. The flow channel 1611 is recessed toward the upper cover 15 or the bottom plate 12. The protective plate 1613 at least covers the recessed area on the plate body 1612 to form a closed flow channel 1611. The plate body 1612 and the protective plate 1613 together form a closed flow channel 1611, which is beneficial to prevent the temperature regulating medium from overflowing. At the same time, the temperature regulating plate 161 is formed by installing the separate plate body 1612 and the protective plate 1613, which is beneficial to improve the convenience during manufacturing. If a closed flow channel 1611 is directly opened in the integral temperature regulating plate 161, the manufacturing difficulty is high.

[0076] In some embodiments where the temperature regulating element 16 is only provided on the upper cover 15 or the temperature regulating element 16 is only provided on the bottom plate 12 , the plate body 1612 is only laid on the upper cover 15 or only laid on the bottom plate 12 .

[0077] The battery pack 100 also includes a battery body arranged in the accommodating cavity 14, and the inlet and outlet of the flow channel 1611 are located on the same side of the temperature regulating plate 161, thereby increasing the flow path of the flow channel 1611, increasing the flow area of ​​the temperature regulating medium, and improving the temperature regulating efficiency of the temperature regulating medium on the battery body as a whole. There are several embodiments for the flow channel 1611: in the first embodiment, the flow channel 1611 is arranged at least around the top of the battery body from the inlet and then reaches the outlet; in the second embodiment, the flow channel 1611 is arranged at least around the bottom of the battery body from the inlet and then reaches the outlet; in the third embodiment, the flow channel 1611 is arranged at least around the top and bottom of the battery body from the inlet and then reaches the outlet. Preferably, the flow channel 1611 is arranged at least around the top and bottom of the battery body from the inlet and then reaches the outlet. Specifically, the temperature regulating medium flows into the flow channel 1611 from the inlet, flows through the flow channel 1611 and then flows out from the outlet. In addition, the above-mentioned structural form facilitates the connection between the temperature regulating connector 52 and the flow channel 1611.

[0078] like Figure 8 As shown, the flow channel 1611 includes a plurality of branches 16111 connected in sequence, and the branches 16111 are at least opened in the first area of ​​the temperature control plate 161, and the shape of the branches 16111 is in the shape of a "J". In other alternative embodiments, the shape of the branches 16111 can also be in the shape of a "bow" or other similar shapes. With the above-mentioned structural form, through a plurality of branches 16111 connected in sequence, it is ensured that the temperature control medium can flow normally in the flow channel 1611, so that the temperature of the battery body in the accommodating cavity 14 can be changed by heat exchange. The shape of the branches 16111 is in the shape of a "J", which increases the distribution area of ​​the branches 16111, so that the area for the circulation of the temperature control medium is wider, and the temperature control efficiency of the temperature control medium on the battery body as a whole is improved.

[0079] In this embodiment, the first area is at least provided on the top and bottom of the battery body. In some embodiments where the temperature regulating element 16 is provided only on the upper cover 15 or only on the bottom plate 12 , the first area is provided only on the upper cover 15 or only on the bottom plate 12 .

[0080] There are several implementations for the branches 16111: In the first implementation, multiple branches 16111 are arranged at intervals along the length direction of the temperature regulating plate 161; In the second implementation, each branch 16111 extends from one side of the temperature regulating plate 161 to the other side of the temperature regulating plate 161 along the width direction of the temperature regulating plate 161; In the third implementation, multiple branches 16111 are arranged at intervals along the length direction of the temperature regulating plate 161, and each branch 16111 extends from one side of the temperature regulating plate 161 to the other side of the temperature regulating plate 161 along the width direction of the temperature regulating plate 161. Figure 3As shown, preferably, a plurality of branches 16111 are arranged at intervals along the length direction of the temperature regulating plate 161, and each branch 16111 extends from one side of the temperature regulating plate 161 to the other side of the temperature regulating plate 161 along the width direction of the temperature regulating plate 161, thereby further increasing the distribution area of ​​the branches 16111, so that the area for the temperature regulating medium to circulate is wider, thereby improving the temperature regulating efficiency of the temperature regulating medium on the entire battery body.

[0081] In addition, in the fourth embodiment, a plurality of branches 16111 are arranged at intervals along the width direction of the temperature regulating plate 161; in the fifth embodiment, each branch 16111 extends from one side of the temperature regulating plate 161 to the other side of the temperature regulating plate 161 along the length direction of the temperature regulating plate 161; in the sixth embodiment, a plurality of branches 16111 are arranged at intervals along the width direction of the temperature regulating plate 161, and each branch 16111 extends from one side of the temperature regulating plate 161 to the other side of the temperature regulating plate 161 along the length direction of the temperature regulating plate 161. Preferably, a plurality of branches 16111 are arranged at intervals along the width direction of the temperature regulating plate 161, and each branch 16111 extends from one side of the temperature regulating plate 161 to the other side of the temperature regulating plate 161 along the length direction of the temperature regulating plate 161, thereby further increasing the distribution area of ​​the branches 16111, so that the area for the temperature regulating medium to circulate is wider, and the temperature regulating efficiency of the temperature regulating medium on the entire battery body is improved.

[0082] Further, one end of the connecting tube 162 near the thermostat connector 52 is a hose, and one end of the connecting tube 162 near the thermostat connector 52 is sleeved on the interface of the thermostat connector 52 through the hose. One end of the connecting tube 162 near the thermostat connector 52 is set as a hose, which facilitates the floating of the thermostat connector 52.

[0083] In this embodiment, the connecting pipe 162 is configured as a hose as a whole. In other embodiments, the connecting pipe 162 may also be configured as a hose only at one end close to the temperature regulating connecting pipe 162 .

[0084] Furthermore, the temperature regulating member 16 also includes a circulation pipe, which is laid in the flow channel 1611, and the temperature regulating medium circulates in the circulation pipe. The temperature regulating medium is contained in the circulation pipe, which solves the sealing problem, and reduces the sealing requirements between the protection plate 1613 and the plate body 1612. Of course, the flow channel 1611 may not be provided, and the circulation pipe may be directly fixed to the temperature regulating plate 161, and the circulation pipe may be wound in a "J" shape. In this way, the circulation pipe does not have the limit protection of the flow channel 1611, which will result in a limited service life of the circulation pipe. Therefore, in this embodiment, by providing the flow channel 1611 and laying the circulation pipe in the flow channel 1611, it is beneficial to increase the service life of the circulation pipe.

[0085] like Fig. 9As shown, the battery pack 100 also includes a battery body disposed in the accommodating cavity 14. The battery body can be protected by the accommodating cavity 14, thereby increasing the service life of the battery body. In addition, the above-mentioned form can assemble the battery pack 100 into an integral module, which is convenient for the subsequent installation of the battery pack 100 in a module form.

[0086] like Fig.10 As shown, the battery case 1 also includes a reinforcement member 2 arranged between the temperature regulating member 16 and the bottom plate 12, one end of the reinforcement member 2 is connected to the bottom plate 12, and the other end of the reinforcement member 2 extends in the direction close to the battery body for supporting the battery body. The bottom plate 12 can be reinforced by the reinforcement member 2, thereby improving the strength of the bottom plate 12, thereby reducing the risk of the bottom plate 12 being crushed by the battery body, improving the strength and stability of the bottom plate 12 supporting the battery body, and then improving the stability and reliability of the battery body placed in the accommodating cavity 14.

[0087] In this embodiment, the reinforcement member 2 is connected to the upper surface of the bottom plate 12 to facilitate the reinforcement member 2 to support the battery body. In addition, in this embodiment, the reinforcement member 2 is made of a profile, and in other embodiments, the material of the reinforcement member 2 can be adjusted according to actual needs, which is not limited here.

[0088] like Figure 11-13 As shown, the reinforcement 2 includes a first reinforcement portion 21 and a first support portion 22. The first reinforcement portion 21 is connected to the bottom plate 12. The first support portion 22 is connected to the first reinforcement portion 21 and extends from the first reinforcement portion 21 to the direction close to the battery body. The first support portion 22 is used to support the battery body. With the above-mentioned structural form, the first reinforcement portion 21 is connected to the bottom plate 12, and the first support portion 22 abuts against the battery body. The battery body can be supported by the first reinforcement portion 21 and the first support portion 22, thereby improving the strength and stability of the bottom plate 12 supporting the battery body, and further improving the stability and reliability of the battery body placed in the accommodating cavity 14. Specifically, in this embodiment, the lower surface of the first reinforcement portion 21 is connected to the upper surface of the bottom plate 12, and the first support portion 22 is connected to the upper surface of the first reinforcement portion 21, so that the reinforcement 2 can support the battery body through the first support portion 22.

[0089] In order to improve the structural strength of the reinforcement 2, the first reinforcement part 21 and the first support part 22 are preferably integrally formed. In other embodiments, the first reinforcement part 21 and the first support part 22 may also be separately provided, so that if one of the first reinforcement part 21 and the first support part 22 is damaged, only the damaged first reinforcement part 21 and the first support part 22 need to be replaced for normal use, thereby reducing the use cost.

[0090] In order to reduce the weight and use cost of the reinforcement 2, a first cavity 23 is preferably opened on the reinforcement 2, and there are multiple first support portions 22, which are spaced apart along the extension direction of the first reinforcement portion 21 to form a first cavity 23 between two adjacent first support portions 22.

[0091] In this embodiment, the number of the first support parts 22 is greater than four, so that a plurality of first cavities 23 can be formed, thereby reducing the weight and use cost of the reinforcement 2 while ensuring the overall structural strength. In other embodiments, the specific number of the first support parts 22 can be adjusted according to actual needs and is not limited here.

[0092] The reinforcement member 2 further includes a second reinforcement portion 24 and a second support portion 25, wherein the second reinforcement portion 24 is connected to the first support portion 22, one end of the second support portion 25 is connected to the second reinforcement portion 24, and the other end of the second support portion 25 extends toward the direction close to the bottom plate 12 for connection with the bottom plate 12. With the above-mentioned structural form, the second reinforcement portion 24 and the second support portion 25 further improve the strength of the bottom plate 12, and also improve the strength of the first reinforcement portion 21 and the first support portion 22, thereby further improving the strength and stability of the bottom plate 12 supporting the battery body, and further improving the stability and reliability of the battery body placed in the accommodating cavity 14.

[0093] In this embodiment, if Fig.12 and Fig.13 As shown, for the first support portion 22 and the first reinforcement portion 21 close to the frame structure 11, the second reinforcement portion 24 is connected to a first support portion 22 farthest from the frame structure 11 among the plurality of first support portions 22. Fig.12 and Fig.13 As shown, for the first support part 22 and the first reinforcement part 21 close to the frame structure 11, the second reinforcement part 24 is connected to the middle position of the first support part 22, thereby reducing the height of the second support part 25, thereby improving the stability and reliability of the second support part 25 supporting the bottom plate 12. In addition, with the above-mentioned structural form, the second reinforcement part 24 is connected to the middle position of the first support part 22, which can make way for the buffer 17, so that the second reinforcement part 24 and the second support part 25 can support part of the buffer 17. Fig.11 and Fig.15 As shown, for the first support portion 22 and the first reinforcement portion 21 far away from the frame structure 11, the second reinforcement portion 24 is connected to a first support portion 22 farthest from the transverse rib 42 among the plurality of first support portions 22. Fig.11 and Fig.15As shown, the second reinforcing portion 24 is connected to the side wall 20 of the first supporting portion 22 near the top wall, so that the battery body can be supported by the second reinforcing portion 24 .

[0094] There are multiple second support parts 25, which are spaced apart along the extension direction of the second reinforcement part 24 to form a first cavity 23 between two adjacent second support parts 25. The above structure reduces the weight and use cost of the reinforcement 2 while ensuring the overall structural strength.

[0095] In this embodiment, the number of the second support parts 25 is greater than four, so that a plurality of first cavities 23 can be formed, thereby reducing the weight and use cost of the reinforcement 2 while ensuring the overall structural strength. In other embodiments, the specific number of the second support parts 25 can be adjusted according to actual needs and is not limited here.

[0096] In addition, in this embodiment, the second reinforcing portion 24 and the second supporting portion 25 are integrally formed. In other embodiments, the second reinforcing portion 24 and the second supporting portion 25 may also be separately provided, so that if one of the second reinforcing portion 24 and the second supporting portion 25 is damaged, only the damaged second reinforcing portion 24 and the second supporting portion 25 need to be replaced for normal use, thereby reducing the use cost.

[0097] The reinforcement member 2 also includes a third reinforcement portion 26, which is connected to the first support portion 22 near the frame structure 11, and one end of the first support portion 22 near the battery body is connected to the third reinforcement portion 26, and the other end is connected to the first reinforcement portion 21. With the above-mentioned structural form, the overall strength of the reinforcement member 2 near the frame structure 11 is improved by the third reinforcement portion 26, thereby further improving the strength and stability of the bottom plate 12 supporting the battery body, thereby improving the stability and reliability of the battery body placed in the accommodating cavity 14, and at the same time, the connection between the frame structure and the bottom plate can be strengthened, thereby further improving the stability of the battery box.

[0098] During specific use, two adjacent first supporting portions 22 are respectively connected to the first reinforcing portion 21 and the third reinforcing portion 26 to form a closed first cavity 23 between the two adjacent first supporting portions 22 , thereby further improving the structural strength of the reinforcing member 2 .

[0099] In order to improve the structural strength of the reinforcement member 2 , the first reinforcement portion 21 , the first support portion 22 and the third reinforcement portion 26 are preferably formed in one piece.

[0100] like Fig.13As shown, the reinforcement member 2 also includes a protrusion 27, which is connected to the side of the third reinforcement portion 26 away from the first support portion 22 and extends from the third reinforcement portion 26 toward the battery body, and the protrusion 27 is used to support the battery body. With the above structure, the reinforcement member 2 supports the battery body through the protrusion 27.

[0101] In actual use, there are multiple protrusions 27, and the multiple protrusions 27 are arranged at intervals along the extension direction of the third reinforcing portion 26, thereby improving the stability and reliability of the protrusions 27 supporting the battery body.

[0102] The setting position of the reinforcement 2 can have the following embodiments. In the first embodiment, the reinforcement 2 is set at the corresponding position of the frame structure 11 on the bottom plate 12; in the second embodiment, the reinforcement 2 is set at the corresponding position of the fixing member 4 on the bottom plate 12, specifically, the reinforcement 2 can be set at the corresponding position of the transverse rib 42 on the bottom plate 12; in the third embodiment, the reinforcement 2 is set at the corresponding position of the frame structure 11 on the bottom plate 12, and the reinforcement 2 is set at the corresponding position of the fixing member 4 on the bottom plate 12. Preferably, the reinforcement 2 is set at the corresponding position of the frame structure 11 and the fixing member 4 on the bottom plate 12, and extends in the direction away from the frame structure 11 and the fixing member 4. With the above-mentioned structural form, a plurality of reinforcements 2 are arranged at intervals along the extension direction of the bottom plate 12, which further improves the strength of the bottom plate 12, thereby improving the strength and stability of the bottom plate 12 supporting the battery body, and further improving the stability and reliability of the battery body placed in the accommodating cavity 14. In addition, the connection between the bottom plate 12 and the frame structure 11 and the corresponding position of the fixing member 4 are reinforced by the reinforcement member 2, thereby improving the structural strength of the battery box body.

[0103] like Fig.10 and Fig.12 As shown, the battery box 1 also includes a buffer 17, which is arranged between the temperature regulating component 16 and the bottom plate 12, so as to provide a buffer for the battery body and prevent the battery body from being damaged by collision during transportation, thereby further improving the safety and service life of the battery body.

[0104] In this embodiment, the buffer member 17 is a buffer foam. In other embodiments, the type of the buffer member 17 can be adjusted according to actual needs and is not limited here.

[0105] One side of the thermostat 16 is connected to the reinforcement 2 and the end of the buffer 17 away from the bottom plate 12, and the other side is connected to the battery body. With the above structure, the thermostat 16 is arranged on the side of the buffer 17 and the reinforcement 2 close to the battery body, which improves the efficiency of the thermostat 16 in changing the temperature of the battery body. In this embodiment, the thermostat 16 is in direct contact with the battery body, thereby further improving the efficiency of the thermostat 16 in changing the temperature of the battery body.

[0106] In a specific embodiment, Fig.12 and Fig.14 As shown, the lower plate structure of the battery box 1 includes: a bottom plate 12 at the lower layer, a buffer 17 and a reinforcement 2 at the middle layer, and a thermostat 16 at the upper layer, wherein the lower side of the thermostat 16 is respectively connected to the reinforcement 2 and the end of the buffer 17 away from the bottom plate 12, and the upper side of the thermostat 16 is connected to the battery body. The reinforcement 2 is laid on the bottom plate 12 at the corresponding position of the frame structure 11 and the fixing member 4, and extends in the direction away from the frame structure 11 and the fixing member 4. The buffer 17 is laid between adjacent reinforcements 2 on the bottom plate 12.

[0107] The battery box 1 also includes a front beam 18, a rear beam 19 and two side walls 20, and the front beam 18 and the rear beam 19 are respectively connected to the front and rear ends of the two side walls 20, so that the front beam 18, the rear beam 19 and the side walls 20 are surrounded to form a frame structure 11, and the upper cover 15 and the bottom plate 12 are respectively covered on the top surface and the bottom surface of the frame structure 11. The frame structure 11 makes the battery box 1 have good structural strength, and the upper cover 15, the bottom plate 12 and the frame structure 11 together form a receiving cavity 14 for receiving functional parts and the battery body.

[0108] like Fig.16 As shown, the front beam 18 and the rear beam 19 are provided with an opening 151 communicating with the accommodating cavity 14, and the closing cover 152 is detachably connected to the front beam 18 and the rear beam 19, and is used to close or open the opening 151. When the functional parts need to be repaired or replaced, the opening 151 of the front beam 18 and the rear beam 19 can play an auxiliary role, for example, it can increase the viewing angle, increase the operating space, etc., so as to improve the later maintenance efficiency of the battery pack 100. In other embodiments, the opening 151 can be set only on the front beam 18, or only on the rear beam 19.

[0109] like Fig. 9 As shown, the battery box 1 also includes a fixing member 4, which is located in the frame structure 11 and is connected to the front beam 18, the rear beam 19 and the two side walls 20. The fixing member 4 can effectively strengthen the structural strength of the battery box 1, effectively avoid deformation of the battery pack 100, improve the anti-seismic performance of the battery pack 100, and greatly improve the safety and stability of the battery pack 100.

[0110] The fixing member 4 includes transverse ribs 42 and longitudinal ribs 41 that are staggered and connected to each other, and has the characteristics of simple structure, convenient processing and manufacturing, and reduced use cost. In this embodiment, the number of longitudinal ribs 41 is one, and the number of transverse ribs 42 is two. The longitudinal rib 41 is connected to one of the transverse ribs 42 in a cross shape, and the other transverse rib 42 is connected to one end of the longitudinal rib 41, thereby further improving the structural strength and stability of the fixing member 4.

[0111] like Fig.10 and Fig.14 As shown, the reinforcement 2 is arranged at the corresponding positions of the frame structure 11 and the fixing member 4 on the bottom plate 12, and extends in the direction away from the frame structure 11 and the fixing member 4. Specifically, the reinforcement 2 is arranged at the corresponding positions of the front beam 18, the rear beam 19 and the transverse rib 42 in the fixing member 4 on the bottom plate 12. For the reinforcement 2 arranged at the corresponding positions of the front beam 18 and the rear beam 19 on the bottom plate 12, the reinforcement 2 is connected to the front beam 18 and the rear beam 19, so that the connection position between the bottom plate 12 and the front beam 18 and the rear beam 19 can be strengthened by the reinforcement 2; for the reinforcement 2 arranged at the corresponding position of the transverse rib 42 in the fixing member 4 on the bottom plate 12, the reinforcement 2 can cover the transverse rib 42 in the projection in the height direction of the battery pack 100, so that the connection position between the transverse rib 42 and the side wall 20 and the bottom plate 12 can be strengthened by the reinforcement 2, thereby improving the structural strength of the battery box body.

[0112] In order to reduce the weight and use cost of the fixing member 4 , the fixing member 4 preferably has a third cavity inside.

[0113] The top surface of the frame structure 11 has a sealing groove for accommodating a sealant, and the sealing groove is arranged around the frame structure 11, and the upper cover 15 is bonded to the top surface of the frame structure 11 by the sealant. The bonding form has a good sealing effect, which can effectively prevent external dust or liquid from entering the battery box 1, which is beneficial to improving the service life of the battery pack 100. At the same time, the use of the sealing groove to accommodate the sealant can effectively prevent the sealant from overflowing, and improve the connection stability between the upper cover 15 and the frame structure 11.

[0114] Optionally, the top surface of the frame structure 11 has a plurality of sealing grooves for accommodating sealant, and the plurality of sealing grooves are arranged around the frame structure 11. Alternatively, the top surface of the frame structure 11 has a sealing groove for accommodating sealant, and the sealing groove is arranged around the frame structure 11, for example, the sealing groove is a round-shaped sealing groove, and the round-shaped sealing groove is arranged around the frame structure 11.

[0115] The front beam 18 , the rear beam 19 and the two side walls 20 are all made of profiles, and the front beam 18 , the rear beam 19 and the two side walls 20 have cavities inside, which helps to reduce the weight and use cost of the battery box 1 .

[0116] This embodiment also discloses an electric vehicle, which includes the battery pack 100 as described above. When the battery pack 100 of the electric vehicle needs to be repaired or replaced, the closed cover 152 of the battery pack 100 can be removed and maintenance can be performed from the opening 151 of the battery pack 100 without removing the upper cover 15 of the battery pack 100, which is conducive to reducing the workload of the later maintenance of the battery pack 100 and improving the later maintenance efficiency of the battery pack 100.

[0117] 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 case, which includes an upper cover, a bottom plate and a receiving cavity for receiving functional parts. The upper cover and / or the bottom plate are provided with an opening, which is communicated with the receiving cavity. A closing cover is detachably connected to the upper cover and / or the bottom plate, and the closing cover is used to close or open the opening.

2. The battery pack according to claim 1, characterized in that: The functional part includes an electrical connector and a thermostatic connector, the opening includes a first opening, and the position of the first opening corresponds to the positions of the electrical connector and the thermostatic connector; And / or, the functional part includes a control panel, the opening includes a second opening, and a position of the second opening corresponds to a position of the control panel.

3. The battery pack according to claim 1, wherein: The battery box further comprises a first sealing member disposed between the closing cover and the upper cover, and / or a second sealing member disposed between the closing cover and the bottom plate; The first sealing member is used to fill the gap between the closing cover and the upper cover, and the second sealing member is used to fill the gap between the closing cover and the bottom plate.

4. The battery pack according to claim 1, wherein: 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.

5. The battery pack according to claim 4, characterized in that: The temperature regulating element comprises a temperature regulating plate, on which a flow channel is provided, and the flow channel is used for circulating a temperature regulating medium; The inlet and the outlet of the flow channel are respectively provided with connecting pipes, and the battery pack also includes a temperature regulating connector, and the temperature regulating connector is connected to the flow channel through the connecting pipe.

6. The battery pack according to claim 5, characterized in that: The temperature regulating plate comprises a plate body and a protection plate, wherein the plate body is laid on the upper cover and / or the bottom plate; The flow channel is provided on a side of the plate body facing away from the upper cover or the bottom plate, and the flow channel is recessed toward the upper cover or the bottom plate; The protection plate at least covers the recessed area on the plate body to form the closed flow channel.

7. The battery pack according to claim 5, characterized in that: The battery pack also includes a battery body arranged in the accommodating cavity, the inlet and outlet of the flow channel are located on the same side of the temperature regulating plate, and the flow channel is arranged from the inlet around at least the top and / or bottom of the battery body and then reaches the outlet.

8. The battery pack according to claim 4, characterized in that: The battery pack further includes a battery body disposed in the accommodating cavity, and the battery box further includes 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, so as to support 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.

9. The battery pack according to claim 1, characterized in that: The battery box also includes 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 side walls together form a frame structure, and the upper cover and the bottom plate are respectively covered on the top and bottom surfaces of the frame structure.

10. The battery pack according to claim 9, characterized in that: The front beam and / or the rear beam are provided with the opening communicated with the accommodating cavity, and the closing cover is detachably connected to the front beam and / or the rear beam for closing or opening the opening.

11. The battery pack according to claim 9, characterized in that: 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.

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

13. The battery pack according to claim 9, characterized in that: The top surface of the frame structure has 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; And / or, the front beam, the rear beam and the two side walls are all made of profiles, and the front beam, the rear beam and the two side walls have cavities inside.

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

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