Electric vehicles, battery packs and their battery modules

Abstract

This application relates to the field of vehicle technology and discloses an electric vehicle, a battery pack, and a battery module thereof. The battery module includes a cell assembly and a hollow module frame. The cell assembly includes a busbar and several cell bodies. The module frame has an internal cavity in which the cell bodies are housed. The busbar includes a circuit board and acquisition terminals. The circuit board is located inside the module frame and electrically connected to the corresponding cell bodies. The acquisition terminals are electrically connected to the circuit board and have insertion portions. One side of the module frame has an outer wall with a mounting surface and insertion holes that connect to the cavity. The acquisition terminals are inserted into these insertion holes, with the insertion portions oriented substantially parallel to the mounting surface. A plane perpendicular to the mounting surface is defined as a projection surface, and the orthographic projection of the acquisition terminals onto this surface is located inside the orthographic projection of the module frame onto the same surface. This battery module and the battery pack using it require relatively little installation space.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more specifically, to an electric vehicle, a battery pack, and a battery module thereof. Background Technology

[0002] An electric vehicle is a vehicle powered by a battery pack that supplies electricity to a motor, which then drives the wheels. The battery pack typically includes a battery casing and several battery modules housed within it. Each battery module generally includes a module frame and several battery cells housed within the frame. The battery module is equipped with data acquisition terminals, which are exposed through holes in the module frame. These terminals are electrically connected to the electric vehicle's battery management system via cables, enabling the system to monitor the voltage or current of the battery cells during charging and discharging in real time, thereby improving the safety of the battery module during charging and discharging.

[0003] The cables of an electric vehicle's battery management system typically have mating terminals for electrical connections. These terminals mate with the connectors of the data acquisition terminals via a plug-in method and are electrically connected to the data acquisition terminals. Currently, the mating terminals are generally plugged into the data acquisition terminals along the through-hole direction on the battery module used to expose the data acquisition terminals. This results in the mating terminals being essentially perpendicular to the surface of the battery module frame. Consequently, the mating terminals and the cables connected to them protrude from the module frame and occupy part of the battery module's installation space, thus requiring a larger installation space for the battery module. Utility Model Content

[0004] In view of this, this application provides a battery module, a battery pack using the battery module, and an electric vehicle using the battery pack, wherein the battery module and the battery pack using the battery module require less installation space.

[0005] This application provides a battery module including multiple cell assemblies and a module frame. Each cell assembly includes a busbar and several cell bodies. The module frame has multiple accommodating cavities, with each cell assembly corresponding to one cavity, and several cell bodies of each cell assembly housed within their respective accommodating cavities. The busbar includes a circuit board and acquisition terminals. The circuit board is located inside the module frame and electrically connected to the corresponding several cell bodies. The acquisition terminals are electrically connected to the circuit board and have insertion portions. One side of the module frame has an outer wall with a mounting surface and insertion holes that connect to the accommodating cavities. The acquisition terminals are inserted into these insertion holes, with the insertion portions oriented substantially parallel to the mounting surface. A plane perpendicular to the mounting surface is defined as a projection surface, and the orthographic projection of the acquisition terminals onto this projection surface lies within the orthographic projection of the module frame onto the projection surface.

[0006] In some embodiments of this application, the module frame includes a frame housing, a cover plate, and several guide members. Multiple accommodating cavities are disposed inside the frame housing. The frame housing has openings for loading battery cell assemblies, and these openings communicate with the accommodating cavities. The cover plate is connected to the frame housing and seals the openings. The circuit board of the busbar is disposed between the cover plate and the corresponding battery cell body. The side of the cover plate facing away from the frame housing has a mounting surface. Several guide members are spaced apart on the mounting surface, and a wiring groove is formed between adjacent guide members. The wiring groove communicates with an insertion hole, and the insertion portion faces the wiring groove.

[0007] In some embodiments of this application, the module frame further includes several partitions disposed within the frame housing, the partitions being substantially perpendicular to the mounting surface and dividing the interior of the frame housing into several independent accommodating cavities.

[0008] In some embodiments of this application, the acquisition terminal and the partition plate at least partially overlap in their orthographic projections on the mounting surface.

[0009] In some embodiments of this application, the frame housing is provided with mounting portions, and multiple mounting portions are provided corresponding to the receiving cavities. Each mounting portion includes two mounting slots, and the busbar also includes two conductive portions, with one conductive portion corresponding to one mounting slot and each conductive portion inserted into the corresponding mounting slot.

[0010] In some embodiments of this application, the battery module further includes a conductive element having a first end and a second end. The first end is inserted into one of the mounting slots of one of the mounting portions and electrically connected to the corresponding conductive portion, and the second end is inserted into one of the mounting slots of another mounting portion and electrically connected to the corresponding conductive portion.

[0011] In some embodiments of this application, the frame housing is provided with a protective member, which covers the conductive part and is detachably connected to the frame housing.

[0012] In some embodiments of this application, the outer wall of the module frame is provided with a guide groove, at least one end of which is open, and the module frame is provided with a limiting protrusion, at least a portion of which is located within the guide groove.

[0013] Embodiments of this application also provide a battery pack, including a battery housing and a battery module provided in any of the above embodiments, wherein the battery module is disposed inside the battery housing.

[0014] Embodiments of this application also provide an electric vehicle, including a frame, a body panel, a running system, and a power system. The body panel at least partially covers the frame; the running system is at least partially disposed under the frame; the power system includes a motor and a battery pack provided in the above embodiments, the battery pack and the motor are supported by the frame, the battery pack is electrically connected to the motor to supply power to the motor, and the motor is drively connected to the running system to drive the running system.

[0015] The battery module used in this electric vehicle and battery pack has its connector portion of the acquisition terminal oriented parallel to the mounting surface. This allows the mating terminal that mates with the connector portion of the acquisition terminal to be substantially parallel to and in contact with the mounting surface. It also allows the cable connected to the mating terminal to be substantially parallel to and in contact with the mounting surface. This reduces the space occupied by the mating terminal and the cable connected to the mating terminal, thereby reducing the installation space required for the battery module and, consequently, the installation space required for the battery pack using this battery module. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a battery pack provided in one embodiment of this application; Figure 2 for Figure 1 A schematic diagram of the battery module after the cover has been removed; Figure 3 for Figure 1 A partial cross-sectional view of the battery pack along the cut plane; Figure 4 for Figure 2 A partial exploded view of the battery module in the diagram; Figure 5 for Figure 1 The diagram shows the structure of the battery module provided in the document. Figure 6 This is a schematic diagram of the structure of another battery module provided in one embodiment of this application; Figure 7 for Figure 2 Enlarged view at point B; Figure 8 This is a schematic diagram of the structure of an electric vehicle provided in an embodiment of this application. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0019] In this application, the term "several" means "at least one", and the term "multiple" means "at least two".

[0020] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0021] Reference Figure 1 One embodiment of this application provides a battery pack 100, which includes a battery housing 11 and battery modules 12. The battery modules 12 are disposed inside the battery housing 11 and connected to the battery housing 11. In some embodiments, there are multiple battery modules 12, which are connected in series or in parallel to enable the battery pack 100 to obtain the required voltage and capacity. In other embodiments, the number of battery modules 12 inside the battery housing 11 may be only one, as long as the voltage and capacity of the battery pack 100 meet the requirements.

[0022] Reference Figure 1 and Figure 2 The battery module 12 includes a module frame 121 and a cell assembly 122 disposed within the module frame 121. The module frame 121 includes a frame housing 1211 and a cover plate 1212. The frame housing 1211 is a hollow cuboid shell with an opening 1211a on one side, making it essentially an open-sided shell. The opening 1211a is used to fill the cell assembly 122 into the frame housing 1211. The cover plate 1212 covers the opening 1211a and is detachably connected to the frame housing 1211, providing protection for the cell assembly 122. In some embodiments, the cover plate 1212 can be snapped onto the frame housing 1211. In other embodiments, the cover plate 1212 can be connected to the frame housing 1211 by screws or other structures. In other embodiments, the cover plate 1212 can also be bonded to the frame housing 1211 by 3M adhesive or similar materials.

[0023] The outer wall of the frame housing 1211 is provided with a guide groove 1211b, which is arranged along the through direction Y of the opening 1211a. In some embodiments, both ends of the guide groove 1211b are open. In other embodiments, only one end of the guide groove 1211b may be open.

[0024] Reference Figure 1 , Figure 2 and Figure 3The battery housing 11 is basically rectangular. A guide strip 111 is provided on the inner wall of the battery housing 11, and the guide strip 111 can slide and engage with the guide groove 1211b. It can be understood that when installing the battery module 12 into the battery housing 11, the guide groove 1211b and the guide strip 111 can be aligned along the through direction Y of the opening 1211a, and then the frame housing 1211 can be moved into the battery housing 11, allowing the guide strip 111 to be inserted into the guide groove 1211b. The engagement of the guide groove 1211b and the guide strip 111 can constrain the position of the frame housing 1211 relative to the battery housing 11 in the width direction of the guide groove 1211b. In some embodiments, the guide groove 1211b can be provided along the length or width direction of the opening 1211a. The guide strip 111 is provided with a threaded hole 1111 for mounting screws along the through direction Y. Figure 1 The cutting surface 101 is parallel to the bottom wall of the guide groove 1211b and passes through the axis of the threaded hole 1111 on the guide bar 111; Figure 3 The cross-sectional lines of the frame shell 1211 are not shown.

[0025] Reference Figure 2 and Figure 3 The frame housing 1211 is provided with a limiting protrusion 1211c, at least a portion of which is disposed within the guide groove 1211b. Exemplarily, the limiting protrusion 1211c is located at one end of the guide groove 1211b near the opening 1211a, and is fixedly connected to the bottom wall of the guide groove 1211b. After the guide bar 111 is inserted into the guide groove 1211b, the limiting protrusion 1211c abuts against the guide bar 111 to constrain the position of the frame housing 1211 relative to the battery housing 11 along the length of the guide groove 1211b.

[0026] The outer side wall of the frame housing 1211 is provided with a receiving groove 1211d, which penetrates the end wall of one end of the frame housing 1211 opposite to the opening 1211a; the inner side wall of the battery housing 11 is provided with a receiving protrusion 112. After the guide bar 111 abuts against the limiting protrusion 1211c, the receiving protrusion 112 is inserted into the receiving groove 1211d and abuts against the bottom wall of the receiving groove 1211d. The receiving protrusion 112 can support the frame housing 1211 and can further constrain the position of the frame housing 1211 relative to the battery housing 11 in the length direction of the guide groove 1211b.

[0027] In some embodiments, the limiting protrusion 1211c is fixedly connected to the guide strip 111 by screws, and the receiving protrusion 112 is fixedly connected to the frame housing 1211 by screws, so that the frame housing 1211 and the battery housing 11 are stably connected. In other embodiments, the battery housing 11 can be fixed to the frame housing 1211 by bolts or pressure plates, as long as the frame housing 1211 and the battery housing 11 are stably connected. For example, the battery housing 11 can be a hollow shell with only the top open. After the battery module 12 is placed inside the battery housing 11, a pressure plate can be installed so that the pressure plate presses the frame housing 1211 against the bottom wall of the battery housing 11 to achieve the effect of fixing the frame housing 1211.

[0028] Reference Figure 4 The module frame 121 also includes several partitions 1213, which are disposed inside the frame housing 1211. The partitions 1213 are parallel to the through direction Y of the opening 1211a. The partitions 1213 divide the interior of the frame housing 1211 into several independent accommodating cavities 1211e. It can be understood that the depth direction of the accommodating cavity 1211e is parallel to the through direction Y of the opening 1211a, and the accommodating cavity 1211e communicates with the opening 1211a.

[0029] Exemplarily, the frame housing 1211 includes a middle housing 1211f and two end plates 1211g. The middle housing 1211f is generally U-shaped, and the two end plates 1211g are respectively disposed at both ends of the middle housing 1211f and welded to the middle housing 1211f. There is one partition plate 1213, which is disposed inside the middle housing 1211f and parallel to the inner wall of the middle housing 1211f. The partition plate 1213 is welded to the bottom wall of the middle housing 1211f and the two end plates 1211g, thereby dividing the interior of the frame housing 1211 into two independent accommodating cavities 1211e. Optionally, guide grooves 1211b and limiting protrusions 1211c may be provided on the end plates 1211g, and cover plate 1212 (see...) Figure 1 It can be detachably connected to the middle housing 1211f.

[0030] Multiple battery cell assemblies 122 are provided in a one-to-one correspondence with the receiving cavities 1211e. Each battery cell assembly 122 includes a busbar 1221 and a plurality of battery cell bodies 1222. The plurality of battery cell bodies 1222 are arranged sequentially in the corresponding receiving cavities 1211e along the length direction of the receiving cavity 1211e, and an insulating partition 1223 is inserted between two adjacent battery cell bodies 1222. In some embodiments, the cell body 1222 is a pouch cell, with one end of the cell body 1222 away from itself (positive electrode tab 1222a and negative electrode tab 1222b) inserted into the receiving cavity 1211e. It is understood that the thickness direction of the cell body 1222 is parallel to the length direction of the receiving cavity 1211e, and both the positive electrode tab 1222a and negative electrode tab 1222b of the cell body 1222 are located close to the opening 1211a, and are spaced apart along the width direction of the receiving cavity 1211e. In other embodiments, the cell body 1222 can be a rigid-cased cell.

[0031] In some embodiments, the cell assembly 122 further includes a shock absorber 1224. The shock absorber 1224 includes a cushioning cotton 1224a and insulating sheets 1224b. The cushioning cotton 1224a is disposed at the bottom of the receiving cavity 1211e to provide a shock-absorbing effect on the bottom of the cell body 1222. There are four insulating sheets 1224b, which are respectively attached to the four inner sidewalls of the receiving cavity 1211e. The insulating sheets 1224b can keep the cell body 1222 separated from the inner sidewalls of the receiving cavity 1211e, reducing the risk of short circuits. Optionally, the frame housing 1211 and the partition plate 1213a can be made of aluminum alloy.

[0032] It is understandable that several battery cell bodies 1222, insulating sheets 1224b and shock absorbers 1224 can be assembled into a whole using tape, and then the assembled whole can be installed into the accommodating cavity 1211e.

[0033] In some embodiments, the damping element 1224 may include insulating adhesive (not shown). After the cell body 1222 is inserted into the receiving cavity 1211e, insulating adhesive can be injected into the receiving cavity 1211e by means of potting, so that the insulating adhesive fills the gap between the cell body 1222 and the inner wall of the receiving cavity 1211e. The insulating adhesive is elastic and can play a certain role in damping shock.

[0034] Busbar 1221 includes circuit board 1221a and acquisition terminal 1221b. Circuit board 1221a is disposed between cover plate 1212 and corresponding cell body 1222; exemplarily, circuit board 1221a covers a plurality of cell bodies 1222. Circuit board 1221a is soldered to the positive electrode tab 1222a and negative electrode tab 1222b of each corresponding cell body 1222, so that the corresponding plurality of cell bodies 1222 are connected in series.

[0035] The acquisition terminal 1221b is soldered to the circuit board 1221a. The acquisition terminal 1221b is used to acquire parameters such as voltage and current for each corresponding battery cell body 1222. The acquisition terminal 1221b can be selected as a female connector; that is, the acquisition terminal 1221b has a plug portion 1221c that mates with the male connector, and the orientation of the plug portion 1221c is parallel to the direction in which the male and female connectors of the connector are plugged in. In other embodiments, the acquisition terminal 1221b can be selected as a male connector.

[0036] For ease of description, the orientation of the insertion portion 1221c of a data acquisition terminal 1221b is defined as the insertion direction X of the data acquisition terminal 1221b. For example, the insertion directions X of all data acquisition terminals 1221b are parallel to each other.

[0037] Reference Figure 4 and Figure 5 The cover plate 1212 has a mounting surface 1212a on the side facing away from the frame housing 1211. Exemplarily, the mounting surface 1212a is the surface of the cover plate 1212 facing away from the frame housing 1211. It is understood that the mounting surface 1212a is substantially perpendicular to the partition plate 1213, that is, the mounting surface 1212a is substantially perpendicular to the through direction Y of the opening 1211a. In some embodiments, the insertion direction X of the acquisition terminal 1221b may be set along the width direction of the receiving cavity 1211e. In other embodiments, the insertion direction X of the acquisition terminal 1221b may be set along the length direction of the receiving cavity 1211e.

[0038] Mounting surface 1212a is provided with insertion holes 1212b. The number of insertion holes 1212b is the same as the number of acquisition terminals 1221b, and one insertion hole 1212b corresponds to one acquisition terminal 1221b. Each acquisition terminal 1221b is inserted into the corresponding insertion hole 1212b, and the insertion part 1221c of the acquisition terminal 1221b is located on the side of mounting surface 1212a away from frame housing 1211. That is, the insertion part 1221c is exposed through the insertion hole 1212b, and the insertion direction X of the acquisition terminal 1221b is basically parallel to the mounting surface 1212a, so as to facilitate the insertion of the mating terminal (not shown in the figure) that mates with the acquisition terminal 1221b into the insertion part 1221c. In other embodiments, the number of insertion holes 1212b may be less than the number of acquisition terminals 1221b, and multiple acquisition terminals 1221b may be inserted into and accommodated in one insertion hole 1212b; for example, the number of insertion holes 1212b may be one.

[0039] When installing the battery module 12, space needs to be reserved to accommodate the mating terminals that plug into the acquisition terminal 1221b and the cables connected to the mating terminals. Compared to the conventional setting where the insertion direction X of the acquisition terminal 1221b is perpendicular to the mounting surface 1212a, by making the insertion direction X of the acquisition terminal 1221b substantially parallel to the mounting surface 1212a, the mating terminals that plug into the acquisition terminal 1221b can be substantially parallel and as close as possible to the mounting surface 1212a, and the cables connected to the mating terminals can be substantially close to the mounting surface 1212a. This reduces the space required for the mating terminals and the cables connected to them, thereby reducing the installation space required for this battery module 12.

[0040] Reference Figure 5 The module frame 121 also includes a plurality of guide members 1214, which are disposed on the mounting surface 1212a. Each insertion hole 1212b corresponds to at least two guide members 1214. The guide members 1214 are prismatic, and the two guide members 1214 are respectively disposed on both sides of the corresponding insertion hole 1212b and on both sides of the corresponding insertion part 1221c. A wiring groove 1214a is formed between the two guide members 1214, so that the insertion part 1221c is oriented towards the wiring groove 1214a. The wiring groove 1214a can constrain and guide the cables connected to the mating terminals, thereby achieving the effect of organizing the cables.

[0041] Reference Figure 6In some embodiments, the module frame 121 further includes a cover 1215, which covers the insertion hole 1212b and connects to the mounting surface 1212a. The cover 1215 has a clearance opening 1215a that connects to the wiring groove 1214a and the insertion hole 1212b. The cover 1215 provides protection for the acquisition terminal 1221b and the mating terminal. In some embodiments, the cover 1215, the guide 1214, and the cover plate 1212 can be integrally injection molded. The dotted lines in the figure are used to separate the cover 1215, the guide 1214, and the cover plate 1212.

[0042] Reference Figure 5 A plane perpendicular to the mounting surface 1212a can be defined as the projection surface 102. Optionally, the projection surface 102 is parallel to the insertion direction X of the acquisition terminal 1221b. The orthographic projection of the acquisition terminal 1221b onto the projection surface 102 is located inside the orthographic projection of the module frame 121 onto the projection surface 102. With this arrangement, the acquisition terminal 1221b is located inside the outline of the module frame 121, which reduces the space occupied by the acquisition terminal 1221b, thereby further reducing the installation space required for this battery module 12.

[0043] Reference Figure 4 and Figure 5 In some embodiments, at least a portion of the acquisition terminal 1221b is disposed on the side of the partition 1213 opposite to the bottom wall of the accommodating cavity 1211e along the through direction Y of the opening 1211a; the orthographic projections of the acquisition terminal 1221b and the partition 1213 on the mounting surface 1212a at least partially overlap.

[0044] By overlapping the projections of the acquisition terminal 1221b and the partition 1213 onto the mounting surface 1212a, the acquisition terminal 1221b penetrates into the mounting space of the partition 1213 in the through direction Y of the opening 1211a, thereby reducing the space occupied by each battery cell assembly 122 in the corresponding receiving cavity 1211e. Alternatively, the acquisition terminals 1221b of two connected battery cell assemblies 122 can be located on the side of the same partition 1213 facing away from the bottom wall of the receiving cavity 1211e along the through direction Y of the opening 1211a, so that the two corresponding acquisition terminals 1221b are staggered, thereby reducing the space occupied by each battery cell assembly 122 in the corresponding receiving cavity 1211e and improving the utilization rate of the space in the adjacent receiving cavity 1211e.

[0045] This configuration increases the space utilization of the cell assembly 122 in each battery module 12, thereby reducing the volume of the battery module 12 and allowing for a greater number of battery modules 12 to be configured in the battery casing 11, which in turn increases the energy density of the battery pack 100.

[0046] Reference Figure 4 and Figure 7 The bus 1221 also includes two conductive portions 1221d, one of which is a positive electrode and the other is a negative electrode. Exemplarily, the two conductive portions 1221d are respectively disposed at both ends of the circuit board 1221a along the length of the accommodating cavity 1211e and soldered to the circuit board 1221a. The conductive portions 1221d are used to supply power to the outside.

[0047] The frame housing 1211 is provided with a mounting portion 1211h, which corresponds to a receiving cavity 1211e. The mounting portion 1211h includes two mounting grooves 1211j, which are respectively located at both ends of the receiving cavity 1211e along its length. In some embodiments, the frame housing 1211 is provided with fixing seats 1211k at both ends of the receiving cavity 1211e, and each fixing seat 1211k is engaged with the frame housing 1211; the mounting grooves 1211j are located on the fixing seats 1211k. In other embodiments, the mounting grooves 1211j may be located on the frame housing 1211. Optionally, the fixing seat 1211k may be made of an insulating material, for example, plastic.

[0048] One conductive part 1221d corresponds to one mounting slot 1211j, and each conductive part 1221d is inserted into its corresponding mounting slot 1211j. The mounting slot 1211j has a constraining effect on the position of the conductive part 1221d, thereby constraining the position of the circuit board 1221a.

[0049] The battery module 12 also includes a conductive element 123, which has a first end 1231 and a second end 1232. The first end 1231 is inserted into one of the mounting slots 1211j of one of the mounting portions 1211h, and the second end 1232 is inserted into one of the mounting slots 1211j of the other mounting portion 1211h. The first end 1231 and the second end 1232 are respectively electrically connected to the corresponding conductive portions 1221d, so that the corresponding two cell assemblies 122 are connected in series or in parallel. It is understood that the number of conductive elements 123 can be set as needed. For example, when all the cell assemblies 122 of the battery pack 100 or battery module 12 are connected in series, the number of conductive elements 123 is one less than the number of cell assemblies 122; when all the cell assemblies 122 of the battery pack 100 or battery module 12 are connected in parallel, the number of conductive elements 123 is two less than twice the number of cell assemblies 122.

[0050] In some embodiments, the frame housing 1211 is provided with protective members 1211m. Optionally, multiple protective members 1211m are provided in a one-to-one correspondence with the mounting grooves 1211j. The protective members 1211m are sheet-shaped and are inserted into the corresponding mounting grooves 1211j and engaged with the corresponding fixing seats 1211k. The protective members 1211m can block the opening of the mounting grooves 1211j and cover the conductive part 1221d and the corresponding first end 1231 or second end 1232 inside. The protective members 1211m can protect the conductive part 1221d or the conductive part 123, reducing the risk of short circuits or contact failures.

[0051] Reference Figure 8 Embodiments of this application also provide an electric vehicle 200. In some embodiments, the electric vehicle 200 is an electric motorcycle, and the electric vehicle 200 includes a frame 21, a body cover 22, a running system 23, and a power system 24. In other embodiments, the electric vehicle 200 may also be a vehicle such as an electric bicycle or an all-terrain vehicle.

[0052] The body panel 22 at least partially covers the frame 21. The running system 23 includes a front wheel 231 and a rear wheel 232, which are rotatably connected to the frame 21, and at least a portion of the front wheel 231 and the rear wheel 232 are disposed under the frame 21 to support the frame 21.

[0053] The power system 24 includes a motor 241 and a battery pack (not shown), the battery pack being the same as that provided in any of the above embodiments. Both the motor 241 and the battery pack are supported by the frame 21 and connected to the rear wheel 232 via a transmission connection. Exemplarily, the motor 241 is a hub motor, and the motor 241 and the rear wheel 232 are integrated into a single unit. The battery pack is electrically connected to the motor 241 to supply power to the motor 241, causing the motor 241 to drive the rear wheel 232 to rotate, thereby moving the electric vehicle 200.

[0054] Furthermore, those skilled in the art should recognize that the above embodiments are merely illustrative of this application and are not intended to limit this application. Any appropriate changes and variations made to the above embodiments within the essential spirit and scope of this application fall within the scope of this application's disclosure.

Claims

1. A battery module, comprising multiple cell assemblies and a module frame; the cell assemblies comprising: Several battery cell bodies; and The busbar includes a circuit board and acquisition terminals. The circuit board is electrically connected to a plurality of corresponding battery cell bodies, and the acquisition terminals are electrically connected to the circuit board. The acquisition terminals are provided with plug-in portions. The module frame is characterized in that it has multiple accommodating cavities inside, each battery cell assembly corresponds to one accommodating cavity, and several battery cell bodies of each battery cell assembly are disposed in the corresponding accommodating cavity. One side of the outer wall of the module frame is provided with a mounting surface, the mounting surface is provided with an insertion hole, the insertion hole communicates with the accommodating cavity, the circuit board is disposed inside the module frame, the acquisition terminal is inserted into the insertion hole, and the orientation of the insertion part is substantially parallel to the mounting surface. A plane perpendicular to the mounting surface is defined as the projection surface, and the orthographic projection of the acquisition terminal on the projection surface is located inside the orthographic projection of the module frame on the projection surface.

2. The battery module according to claim 1, characterized in that, The module frame includes a frame housing, a cover plate, and several guide members. The plurality of accommodating cavities are disposed inside the frame housing. The frame housing has an opening for filling the battery cell assembly, and the opening communicates with the accommodating cavity. The cover plate is connected to the frame housing and seals the opening. The circuit board of each bus is disposed between the cover plate and the corresponding battery cell body. The cover plate has a mounting surface on the side facing away from the frame housing. The several guide members are spaced apart on the mounting surface. A wiring groove is formed between two adjacent guide members. The wiring groove communicates with the insertion hole, and the insertion part is disposed facing the wiring groove.

3. The battery module according to claim 2, characterized in that, The module frame also includes several partitions disposed within the frame housing, the partitions being substantially perpendicular to the mounting surface and dividing the interior of the frame housing into several independent accommodating cavities.

4. The battery module according to claim 3, characterized in that, The acquisition terminal and the partition plate at least partially overlap on the mounting surface.

5. The battery module according to claim 2, characterized in that, The frame housing is provided with a mounting part, and multiple mounting parts are provided in a one-to-one correspondence with the receiving cavity; the mounting part includes two mounting slots, and the busbar also includes two conductive parts, one conductive part corresponds to one mounting slot, and each conductive part is inserted into the corresponding mounting slot.

6. The battery module according to claim 5, characterized in that, The battery module further includes a conductive component, which has a first end and a second end. The first end is inserted into one of the mounting slots of one of the mounting portions and is electrically connected to the corresponding conductive portion. The second end is inserted into one of the mounting slots of the other mounting portion and is electrically connected to the corresponding conductive portion.

7. The battery module according to claim 5, characterized in that, The frame housing is provided with a protective component, which covers the conductive part and is detachably connected to the frame housing.

8. The battery module according to claim 1, characterized in that, The outer wall of the module frame is provided with a guide groove, at least one end of which is open; the module frame is provided with a limiting protrusion, at least a portion of which is located within the guide groove.

9. A battery pack, comprising a battery casing, characterized in that, The battery pack further includes a battery module as described in any one of claims 1 to 8, the battery module being disposed inside the battery housing.

10. An electric vehicle, comprising: Frame; A body panel that at least partially covers the vehicle frame; A walking system, at least partially disposed under the vehicle frame; The power system includes a battery pack and a power motor, which are supported by the vehicle frame. The battery pack is connected to the power motor to supply power to the power motor, and the power motor is connected to the walking system to drive the walking system. The battery pack is characterized in that it is the battery pack as described in claim 9.

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