Power battery and vehicle

Abstract

The utility model provides a power battery and a vehicle, the power battery comprises a loading unit, an electrical module and a connecting unit, the loading unit comprises an electrical cabin and an access cover, the electrical module is arranged in the electrical cabin, the access cover detachably covers the electrical cabin, and the connecting unit comprises a pre-connecting piece and a detachable fastening piece. The pre-connecting piece comprises a fixing part and a pre-mounting part, the fixing part is fixedly mounted in the electrical bin, and the pre-mounting part and the electrical module are detachably connected through a detachable fastener. According to the power battery, on one hand, the assembling efficiency of the electrical module and the loading unit is guaranteed, and on the other hand, the maintenance convenience of the electrical module is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy vehicles, and in particular to a power battery and a vehicle. Background Art

[0002] The power battery of a new energy vehicle includes a battery compartment where the battery cell module is placed and an electrical compartment where the electrical module is placed. To facilitate the maintenance of the electrical module, the electrical compartment usually adopts an openable design, allowing the electrical module to be removed from the electrical compartment.

[0003] Existing power batteries also include a supporting bracket for supporting the electrical module. The electrical module is pre-installed on the supporting bracket and forms an electrical assembly with the supporting bracket. Then the electrical assembly is placed as an assembly into the electrical compartment as a whole, and finally the supporting bracket and the electrical compartment are connected.

[0004] The above assembly scheme is suitable for efficient assembly of electrical modules, but is not convenient for maintenance of electrical modules. It is necessary to first disassemble the supporting bracket and the electrical compartment in order to remove the electrical assembly from the electrical compartment as a whole, and then disassemble the electrical module and the supporting bracket. The maintenance cost of the electrical module is high and the working hours are long. Utility Model Content

[0005] In view of this, the present invention provides a power battery and a vehicle, aiming to improve the maintenance convenience of the electrical module of the power battery so as to reduce the maintenance cost and working hours.

[0006] The power battery of the present invention includes a loading unit, an electrical module and a connecting unit. The loading unit includes an electrical compartment and an inspection cover. The electrical module is arranged in the electrical compartment, and the inspection cover is detachably covered on the electrical compartment. The connecting unit includes a pre-connecting part and a detachable fastener. The pre-connecting part includes a fixing part and a pre-installation part. The fixing part is fixedly installed on the electrical compartment, and the pre-installation part and the electrical module are detachably connected through a detachable fastener.

[0007] In some embodiments, the electrical compartment includes a top side and a bottom side arranged opposite to each other, an inspection cover is detachably covered on the bottom side, a support platform is fixed in the electrical compartment, and the fixing part is fixedly connected to a side of the support platform close to the top side.

[0008] In some embodiments, the pre-installation portion extends into the electrical compartment and protrudes from the base, and the electrical module includes a fixing foot that is detachably connected to a side of the pre-installation portion near the inspection cover via a detachable fastener.

[0009] In some embodiments, the electrical module further includes a main body, the main body includes an adapting side facing the pre-installation portion, the fixing foot protrusion is provided on the adapting side, and an avoidance gap is provided between the adapting side and the pre-installation portion.

[0010] In some embodiments, the electrical compartment is provided with an electrical cavity to accommodate the electrical module, the electrical cavity passes through the top side and the bottom side, and the support is fixed to the inner wall of the electrical cavity and extends into the electrical cavity.

[0011] In some embodiments, the loading unit further includes a cooling chamber disposed in the electrical chamber, at least a portion of the electrical modules are accommodated in the cooling chamber, and a heat-conducting structure surrounding the electrical modules is disposed in the cooling chamber.

[0012] In some embodiments, the power battery further includes a cold plate covering the loading unit, the cooling chamber is thermally connected to the cold plate, and the thermal conductive structure fills the gap between the cooling chamber and the electrical module.

[0013] In some embodiments, the electrical compartment includes a top side and a bottom side arranged in back to back, an inspection cover is detachably covered on the bottom side, the cold plate includes a top cold plate covered on the top side, the cooling compartment is thermally connected to the top cold plate, and the cooling compartment has a receiving cavity open to the bottom side and used to accommodate the electrical module.

[0014] In some embodiments, the loading unit is a casting and further includes a battery compartment integrally connected to the electrical compartment.

[0015] The vehicle of the present invention has the power battery described above.

[0016] Compared with the prior art, the power battery of the present invention has the following advantages:

[0017] On the one hand, the assembly efficiency of the electrical module and the loading unit is guaranteed: the electrical module and pre-connected parts can be pre-assembled into an electrical assembly through detachable fasteners, and then the electrical assembly is placed into the electrical compartment as an assembly. Finally, the electrical assembly is fixed to the electrical compartment through the fixing part;

[0018] On the other hand, it improves the convenience of maintenance of the electrical module: when performing maintenance on the electrical module, first remove the inspection cover and open the electrical compartment, then remove the detachable fasteners. After the detachable fasteners are detached from the pre-installation part and the electrical module, the electrical module can be removed from the pre-connector and taken out separately from the electrical compartment. The pre-connector remains in the electrical compartment and remains connected to the electrical compartment. Then, maintenance operations can be performed directly with fewer disassembly operations. After the maintenance operations are completed, the electrical module and the pre-installation part can be reconnected through the detachable fasteners to reinstall the electrical module into the electrical compartment. The maintenance cost and operating hours of the electrical module are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an exploded view of the structure of a power battery according to one embodiment of the present invention;

[0020] Figure 2This is a cross-sectional view of a power battery according to one embodiment of the present invention;

[0021] Figure 3 This is a top view of a power battery according to one embodiment of the present invention.

[0022] Description of reference numerals:

[0023] 10. Loading unit; 11. Electrical compartment; 111. Support platform; 112. Electrical compartment; 113. Top side; 114. Bottom side; 12. Battery compartment; 13. Inspection cover; 14. Sealing cover; 15. Bottom guard plate; 16. Smoke exhaust compartment; 171. First cavity partition beam; 172. Second cavity partition beam;

[0024] 20. Electrical module; 21. Main body; 211. Adapter side; 22. Fixing foot;

[0025] 30. Connecting unit; 31. Pre-connecting member; 311. Fixing portion; 312. Pre-installing portion; 32. Removable fastener; 33. Assembly fastener;

[0026] 41. Top cold plate; 42. Bottom cold plate; 43. Cooling chamber; 44. Heat conduction structure. DETAILED DESCRIPTION

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

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended only to describe specific embodiments and are not intended to limit this invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] The utility model provides a power battery and, based on this, provides a vehicle including the power battery. Figure 1 and Figure 3The power battery of the present invention includes a loading unit 10, a cell module, an electrical module 20, a connection unit 30, and a refrigeration unit. The loading unit 10 includes a battery compartment 12 and an electrical compartment 11. The battery compartment 12 and the electrical compartment 11 are respectively configured with a battery cavity and an electrical cavity 112. The cell module is placed in the battery cavity, and the electrical module 20 is placed in the electrical cavity 112 and connected to the battery compartment 12 through the connection unit 30. The cell module serves as the energy supply part of the power battery. The electrical module 20 is used to control and manage the cell module, including a BMS (battery management system) module and a BDU (battery disconnect unit) module. The refrigeration unit is used to cool the cell module and the electrical module 20 to prevent the cell module and the electrical module 20 from overheating and causing safety hazards.

[0030] Specifically, see Figures 1 and 2 The loading unit 10 also includes a sealing cover 14, an inspection cover 13 and a bottom guard plate 15. The electrical compartment 11 includes a top side 113 and a bottom side 114 arranged opposite to each other. The battery compartment 12 includes an upper side and a lower side arranged opposite to each other. The sealing cover 14 is covered on the top side 113 and the upper side. The inspection cover 13 is detachably covered on the bottom side 114. The bottom guard plate 15 is covered on the lower side. The inner wall of the electrical cavity 112, the sealing cover 14 and the inspection cover 13 form a closed space for accommodating the electrical module 20. The inner wall of the battery cavity, the sealing cover 14 and the bottom guard plate 15 form a closed space for accommodating the battery cell module. After the inspection cover 13 is removed from the bottom side 114, the electrical module 20 can be taken out from the electrical cavity 112 so that the electrical module 20 can be repaired and maintained. After the repair and maintenance is completed, the electrical module 20 is placed back into the electrical cavity 112 and connected to the electrical compartment 11 through the connecting unit 30. Finally, the inspection cover 13 is re-covered on the bottom side 114 so that the inspection cover 13 closes the electrical cavity 112.

[0031] See Figure 3 Specifically, the loading unit 10 includes a first cavity dividing beam 171, with the electrical cavity 112 and the battery cavity respectively formed on either side of the first cavity dividing beam 171. The electrical cavity 112 and the battery cavity are airtightly separated by the first cavity dividing beam 171 and are therefore not connected to each other. Optionally, when the vehicle including the power battery is parked on a horizontal surface, the first cavity dividing beam 171 is a plate-like structure perpendicular to the horizontal direction, with the battery cavity and the electrical cavity 112 arranged in sequence along the horizontal direction. The top side 113 and the upper side are respectively penetrated by the electrical cavity 112 and the battery cavity, thereby forming an opening that opens upward, and the bottom side 114 and the lower side are respectively penetrated by the electrical cavity 112 and the battery cavity, thereby forming an opening facing the ground.

[0032] Further, see Figures 1 and 2The refrigeration unit includes a cold plate and a cooling chamber 43 located within the electrical compartment 11. The cold plate includes a top cold plate 41 covering the top side 113 and the upper side, and a bottom cold plate 42 covering the lower side. The top cold plate 41 specifically covers the side of the chamber cover 14 facing away from the top side 113 and the upper side, and is thermally connected to the chamber cover 14. The bottom cold plate 42 specifically covers the side of the bottom guard plate 15 relatively close to the lower side, and is thermally connected to the battery compartment 12. A heat-conducting structure 44 is provided between the cooling chamber 43 and the electrical module 20. The cooling chamber 43 is used to cool the electrical module 20, the bottom cold plate 42 is used to cool the battery cell module, and the top cold plate 41 is used to cool the electrical module 20 and the battery cell module.

[0033] Optionally, the cooling chamber 43 is thermally connected to the top cold plate 41, see Figure 2 The cooling chamber 43 is fixedly connected to one side of the chamber cover 14, and the top cold plate 41 is fixedly connected to the side of the chamber cover 14 facing away from the electrical chamber 11 and the battery chamber 12. After the cooling chamber 43 absorbs heat from the electrical module 20, this heat can be transferred to the top cold plate 41 through the chamber cover 14. The top cold plate 41 is formed with a liquid cooling flow channel to allow the cooling medium to pass through the liquid cooling flow channel. While flowing through the liquid cooling flow channel, the cooling medium can remove heat from the top cold plate 41 and the cooling chamber 43, so that the top cold plate 41 and the cooling chamber 43 maintain a low temperature, thereby effectively controlling the temperature of the electrical module 20 and the battery cell module.

[0034] In some embodiments, the loading unit 10 further includes a smoke exhaust chamber 16, which is configured with a smoke exhaust cavity connected to the battery cavity. The smoke exhaust chamber 16 is used to collect smoke from the battery cavity and exhaust the smoke. Figure 1 and Figure 3 The loading unit 10 also includes a second cavity partition beam 172. The electrical chamber 112 and the smoke exhaust chamber are formed on either side of the second cavity partition beam 172, airtightly separating the two chambers and preventing them from communicating with each other. This arrangement prevents smoke from the battery chamber from spreading into the electrical chamber 112 in the event of thermal runaway of the power battery, thus achieving airtight isolation and protection for the electrical compartment 11 and preventing arcing and short circuits in the electrical module 20. Furthermore, disassembly, repair, and maintenance of the electrical module 20 does not affect the airtightness of the battery chamber.

[0035] In some embodiments, the loading unit 10 is a casting, and the battery compartment 12 is integrally formed with the electrical compartment 11. Compared to the prior art in which the electrical compartment 11 and the battery compartment 12 are separately formed and assembled and fixed, this configuration can eliminate the need for fixtures used to clamp and position the electrical compartment 11 and the battery compartment 12. Furthermore, it can eliminate the need to design space for the electrical compartment 11 and the battery compartment 12 to accommodate and avoid the fixtures. This frees up more space for the electrical cavity 112 and the battery cavity, allowing the electrical cavity 112 to accommodate a larger electrical module 20 and the battery cavity to accommodate a larger number of battery cells, thereby improving the space utilization of the loading unit 10.

[0036] See Figure 2 In order to improve the maintenance convenience of the electrical module 20, reduce the number of times the electrical module 20 is disassembled and assembled during the maintenance process, and shorten the working hours required for disassembly and assembly of the electrical module 20, the power battery of the present invention adopts the following method to realize the connection between the electrical module 20, the connecting unit 30 and the electrical compartment 11: the connecting unit 30 includes a pre-connecting part 31 and a detachable fastener 32, wherein the pre-connecting part 31 includes a fixing part 311 and a pre-installation part 312, the fixing part 311 is fixedly installed on the electrical compartment 11, and the pre-installation part 312 and the electrical module 20 form a detachable connection through the detachable fastener 32.

[0037] When assembling the loading unit 10, the electrical module 20, and the connection unit 30 into a power battery, first use the detachable fastener 32 to connect the pre-installation part 312 and the electrical module 20, so that the electrical module 20 and the pre-connector 31 are pre-assembled into an electrical assembly, and then the electrical assembly is placed as a whole into the electrical cavity 112 as an assembly, and then the fixing part 311 is fixedly connected to the electrical compartment 11, and finally the inspection cover 13 is covered on the bottom side 114 and the sealing cover 14 is covered on the top side 113.

[0038] If you plan to repair and maintain the electrical module 20, first remove the inspection cover 13 from the bottom side 114 to open the electrical compartment 11, and then remove the detachable fastener 32 to release the lock of the detachable fastener 32 on the electrical module 20 and the pre-connector 31. After the detachable fastener 32 is detached from the pre-installation part 312 and the electrical module 20, separate the pre-installation part 312 and the electrical module 20 and take out the electrical module 20 separately from the electrical compartment 11. At this time, the pre-connector 31 is still located in the electrical cavity 112, and the fixing part 311 remains connected to the electrical compartment 11. The electrical module 20 can be taken out to directly perform maintenance operations.

[0039] It can be understood that after the maintenance operation of the electrical module 20 is completed, the electrical module 20 and the pre-installation portion 312 can be reconnected and fixed using the detachable fastener 32, and then the inspection cover 13 is replaced on the bottom side 114 to close the electrical compartment 11. The electrical module 20 can be reinstalled into its position. The operation steps of reinstalling the electrical module 20 into the electrical cavity 112 after maintenance are reduced and the operation time required is shortened.

[0040] In addition, the design of the inspection cover 13 being detachably covered on the bottom side 114 allows the electrical module 20 to be repaired and maintained without removing the entire power battery. The vehicle can be lifted from the ground to a certain height using a lift, and then personnel can remove and install the inspection cover 13 from under the vehicle and complete the disassembly and reinstallation of the electrical module 20. During the entire operation, the loading unit 10 is always attached to the bottom of the vehicle.

[0041] In some embodiments, a support 111 is fixedly provided in the electrical compartment 11, and the fixing portion 311 is fixedly connected to a side of the support 111 that is relatively close to the top side 113. Figure 2 The support platform 111 is fixedly protruded from the inner wall of the electrical cavity 112 and extends into the electrical cavity 112; in the vertical direction, the support platform 111 does not protrude from the top side 113 and does not protrude from the bottom side 114; the pre-connector 31 is mounted on the side of the support platform 111 close to the top side 113 through the fixing portion 311, and in the horizontal direction, the pre-installation portion 312 extends into the electrical cavity 112 and protrudes from the support platform 111; the electrical module 20 includes a fixing foot 22, which is detachably connected to the side of the pre-installation portion 312 relatively close to the inspection cover 13 through a detachable fastener 32, and the connecting unit 30 also includes an assembly fastener 33, and the fixing portion 311 is fixedly connected to the side of the support platform 111 relatively close to the top side 113 and the sealing cover 14 through the assembly fastener 33.

[0042] Optionally, the fixing foot 22 is mounted on the side of the pre-installation portion 312 facing away from the top side 113 and close to the inspection cover 13, and the removable fastener 32 and the assembly fastener 33 are both bolts. The screw portion of the removable fastener 32 passes through the fixing foot 22 from the side of the fixing foot 22 away from the top side 113 and then extends into the pre-installation portion 312, and the nut head of the removable fastener 32 is located on the side of the fixing foot 22 away from the top side 113; the screw portion of the assembly fastener 33 passes through the fixing portion 311 from the side of the fixing portion 311 away from the bottom side 114 and then extends into the base 111, and the nut head of the assembly fastener 33 is located on the side of the fixing portion 311 away from the bottom side 114.

[0043] Such a setting not only improves the convenience of maintenance of the electrical module 20, but also takes into account the assembly efficiency and convenience of the power battery. When the power battery is assembled on the assembly line, the electrical assembly formed by the electrical module 20 and the pre-connector 31 is placed into the electrical cavity 112 from the top side 113 of the electrical compartment 11 until the fixing portion 311 is erected on the side of the base 111 close to the top side 113, and then the fixing portion 311 and the base 111 are fixedly connected by the assembly fastener 33. At the same time, it is also convenient for the fastening tool to extend from the top side 113 of the electrical compartment 11 into the electrical cavity 112 to apply force to the assembly fastener 33, and to extend the fastening tool from the bottom side 114 of the electrical compartment 11 into the electrical cavity 112 to apply force to the detachable fastener 32.

[0044] The connection between the fixing portion 311 and the support 111 can be a detachable connection or a non-detachable connection, which is not limited in the present invention. It is understood that in other embodiments, the detachable fasteners 32 and the assembly fasteners 33 are not limited to bolts, but can also be other types of fasteners, as long as the electrical module 20 and the pre-installation portion 312 are detachably connected via the detachable fasteners 32.

[0045] Further, see Figure 2 The cooling chamber 43 is constructed with a accommodating cavity for accommodating the electrical module 20. The accommodating cavity has an opening facing the bottom side 114 and facing away from the top side 113. The electrical module 20 also includes a main body 21. The main body 21 can be a shell structure or a box structure for encapsulating a BMS module and / or a BDU module. A portion of the main body 21 is accommodated in the accommodating cavity, and also includes an adapting side 211 facing the pre-installation portion 312. The fixing foot 22 is protruding from the adapting side 211 and forms an adapting step with the adapting side 211. The pre-installation portion 312 extends to the angle of the adapting step at one end relatively away from the fixing portion 311, and an avoidance gap is provided between the adapting side 211 and the pre-installation portion 312.

[0046] In other embodiments, the main body 21 may also be certain specific electrical components, and other electrical components are fixedly connected to the electrical components serving as the main body 21 .

[0047] Optionally, see Figure 2The cooling chamber 43 is fixed to the sealing cover 14. As the sealing cover 14 is covered on the top side 113 and the upper side, the cooling chamber 43 enters the electrical cavity 112. Finally, as the sealing cover 14 is fixedly connected to the electrical chamber 11, the fixed connection between the cooling chamber 43 and the electrical chamber 11 is achieved. When the electrical assembly is placed into the electrical cavity 112 from the top side 113 until the fixing portion 311 is erected on the side of the base 111 close to the top side 113, it is only necessary to cover the sealing cover 14 on the top side 113, and the cooling chamber 43 can be installed through the accommodating cavity and accommodate the main body 21; when the inspection cover 13 is removed from the bottom side 114, it is only necessary to remove the detachable fastener 32 to remove the main body 21 from the accommodating cavity. As the main body 21 moves out of the cooling chamber 43, the electrical module 20 is taken out of the electrical cavity 112; after the maintenance operation is completed, the main body 21 is first sent back into the accommodating cavity until the fixing foot 22 is erected on the side of the pre-installation portion 312 facing away from the top side 113, and then the fixing foot 22 and the pre-installation portion 312 are connected again with the detachable fastener 32.

[0048] The beneficial effect of setting the avoidance gap is that no matter whether the electrical module 20 is placed in the electrical cavity 112 or removed from the electrical cavity 112, there will be no interference or obstruction between the main body 21 and the pre-installation part 312, which can effectively prevent the electrical module 20 from being damaged. At the same time, it can prevent the pre-connector 31 from moving relative to the electrical compartment 11, causing the pre-installation part 312 to be offset and misaligned, thereby ensuring that the fixing foot 22 can be smoothly placed on the pre-installation part 312 as the main body 21 enters the accommodating cavity, so that the detachable fastener 32 can smoothly connect the fixing foot 22 and the pre-installation part 312.

[0049] Furthermore, in some embodiments, the heat conducting structure 44 in the cooling chamber 43 surrounds the portion of the electrical module 20 located in the accommodating cavity. Figure 2 The thermally conductive structure 44 fills the gap between the main body 21 and the inner wall bracket of the accommodating cavity. The thermally conductive structure 44 is attached to the periphery of the main body 21 and the side of the main body 21 facing away from the access cover 13. This arrangement increases the contact area between the electrical module 20 and the thermally conductive structure 44, allowing the thermally conductive structure 44 to absorb more heat from the electrical module 20 more quickly and transfer the heat more quickly to the cooling chamber 43 and the top cold plate 41, ensuring that the electrical components in the electrical module 20 remain within a safe temperature range.

[0050] Optionally, the heat-conducting structure 44 includes one or more of heat-conducting gel, heat-conducting plate, and heat-conducting pipe; the cooling chamber 43 and the sealing chamber cover 14 can be separately formed and later assembled and fixed into one structure, or they can be an integrally formed structure.

[0051] In some embodiments not shown, the compartment cover 14 is located on the bottom side 114 and the lower side, the inspection cover 13 is removably located on the top side 113, and the bottom guard plate 15 is omitted. Accordingly, the loading unit 10 includes a top guard plate located on the upper side. In these embodiments, when maintenance is required on the electrical module 20, the loading unit 10 and the vehicle must first be disassembled to completely remove the power battery from the vehicle body. The inspection cover 13 is then removed to open the electrical compartment 11, and the removable fasteners 32 are then disassembled to separate the electrical module 20 from the pre-installed portion 312.

[0052] Compared with the prior art, the power battery of the present invention ensures the assembly efficiency of the electrical module 20 and the loading unit 10: the electrical module 20 and the pre-connector 31 can be pre-assembled into an electrical assembly by means of a detachable fastener 32, and then the electrical assembly is placed as an assembly into the electrical compartment 11 from the top side 113 as a whole. Finally, the electrical assembly is fixed to the electrical compartment 11 by means of the fixing portion 311. The electrical assembly is placed into the electrical compartment 11 from the top side 113 rather than from the bottom side 114, thereby reducing the difficulty and cost of assembling the electrical assembly and the electrical compartment 11. The loading unit 10 only needs to be placed on the assembly line and wait for the electrical assembly to be placed in, and then the fixing portion of the pre-connector 31 is supported by the support 111 to realize the support of the electrical assembly.

[0053] In addition, the power battery of the present invention has made significant progress in the convenience of repair and maintenance of the electrical module 20: when repairing and maintaining the electrical module 20, first remove the inspection cover 13 and open the electrical compartment 11, then remove the detachable fastener 32, and after the detachable fastener 32 is detached from the pre-installation portion 312 and the electrical module 20, the electrical module 20 can be removed from the pre-connector 31 and the electrical module 20 can be taken out separately from the electrical compartment 11, and the pre-connector 31 remains in the electrical compartment 11 and remains connected to the electrical compartment 11, and then repair and maintenance can be carried out directly. Maintenance operations are simplified, and disassembly operations are reduced. After the maintenance operations are completed, the electrical module 20 can be reinstalled into the electrical compartment 11 by simply reconnecting the electrical module 20 and the pre-installation portion 312 through the detachable fastener 32. The maintenance cost and operation hours of the electrical module 20 are reduced. When the electrical module 20 is disassembled and repaired, the first cavity partition beam 171 airtightly separates the electrical cavity 112 and the battery cavity, so that the airtightness of the battery cavity is not affected. Therefore, the airtightness of the battery cavity can be maintained for a long time before leaving the factory, and there is no need to test the airtightness of the battery cavity.

[0054] In addition, the cooling chamber 43 with the accommodating cavity can expand the contact area between the heat-conducting structure 44 and the electrical module 20, thereby more efficiently absorbing and conducting the heat of the electrical module 20 through the heat-conducting structure, so that the electrical module 20 reaches a lower and safer temperature. The cooling chamber 43 and the heat-conducting structure 44 can therefore meet the needs of power batteries with a larger charging rate, such as a power battery with a 6C fast charging rate; the opening of the accommodating cavity is arranged opposite to the top side 113. After the maintenance of the electrical module 20 is completed, it is only necessary to send the main body 21 into the accommodating cavity from the bottom side 114 to complete the return and resetting of the electrical module 20 to the electrical cavity 112.

[0055] The various technical features of the above-described embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the various technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] Those skilled in the art should recognize that the above embodiments are merely intended to illustrate the present invention and are not intended to limit the present invention. As long as they are within the spirit of the present invention, appropriate changes and modifications to the above embodiments fall within the scope of protection claimed by the present invention.

Claims

1. A power battery, characterized in that: The invention comprises a loading unit (10), an electrical module (20) and a connecting unit (30), wherein the loading unit (10) comprises an electrical compartment (11) and an inspection cover (13), wherein the electrical module (20) is arranged in the electrical compartment (11), and the inspection cover (13) is detachably covered on the electrical compartment (11), and the connecting unit (30) comprises a pre-connecting member (31) and a detachable fastener (32), wherein the pre-connecting member (31) comprises a fixing portion (311) and a pre-installing portion (312), wherein the fixing portion (311) is fixedly installed on the electrical compartment (11), and the pre-installing portion (312) and the electrical module (20) are detachably connected via the detachable fastener (32).

2. The power battery according to claim 1, characterized in that: The electrical compartment (11) includes a top side (113) and a bottom side (114) arranged in opposite directions, the inspection cover (13) is detachably covered on the bottom side (114), a support platform (111) is fixedly provided in the electrical compartment (11), and the fixing portion (311) is fixedly connected to a side of the support platform (111) close to the top side (113).

3. The power battery according to claim 2, characterized in that: The pre-installation portion (312) extends into the electrical compartment (11) and protrudes from the support platform (111), and the electrical module (20) includes a fixing foot (22), and the fixing foot (22) is detachably connected to a side of the pre-installation portion (312) close to the inspection cover (13) through the detachable fastener (32).

4. The power battery according to claim 3, characterized in that: The electrical module (20) further comprises a main body (21), the main body (21) comprising an adapting side (211) facing the pre-installation portion (312), the fixing foot (22) being protruding from the adapting side (211), and an avoidance gap being provided between the adapting side (211) and the pre-installation portion (312).

5. The power battery according to claim 2, characterized in that: The electrical compartment (11) is provided with an electrical cavity (112) for accommodating the electrical module (20); the electrical cavity (112) passes through the top side (113) and the bottom side (114); the support platform (111) is fixed to the inner wall of the electrical cavity (112) and extends into the electrical cavity (112).

6. The power battery according to claim 1, wherein: The loading unit (10) further includes a cooling chamber (43) disposed within the electrical chamber (11), wherein at least a portion of the electrical module (20) is accommodated within the cooling chamber (43), and a heat-conducting structure (44) surrounding the electrical module (20) is disposed within the cooling chamber (43).

7. The power battery according to claim 6, characterized in that: The power battery further comprises a cold plate covering the loading unit (10), the cooling chamber (43) is thermally connected to the cold plate, and the heat-conducting structure (44) fills a gap between the cooling chamber (43) and the electrical module (20).

8. The power battery according to claim 7, characterized in that: The electrical compartment (11) includes a top side (113) and a bottom side (114) arranged in opposite directions, the inspection cover (13) is detachably covered on the bottom side (114), the cold plate includes a top cold plate (41) covered on the top side (113), the cooling compartment (43) is thermally connected to the top cold plate (41), and the cooling compartment (43) has an accommodating cavity open toward the bottom side (114) and used to accommodate the electrical module (20).

9. The power battery according to any one of claims 1 to 8, characterized in that: The loading unit (10) is a casting and further comprises a battery compartment (12) integrally connected to the electrical compartment (11).

10. A vehicle, characterized in that: The invention comprises a power battery as claimed in any one of claims 1 to 9.

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