Battery pack and vehicle

Abstract

The invention discloses a battery pack and a vehicle. The battery pack comprises a shell, a battery cell module and a cover plate assembly, a containing cavity is formed in the shell, the battery cell module is arranged in the containing cavity, an opening communicated with the containing cavity is formed in the side face of the shell, the cover plate assembly covers the opening in a sealing mode, and the cover plate assembly is detachably connected with the shell. The battery pack can be mounted on the side of the frame, so that the battery pack can be conveniently mounted on and dismounted from the frame; meanwhile, an opening is formed in the side face of the shell in the battery pack, and the cover plate assembly is used for sealing the opening, so that when the battery cell assembly in the shell needs to be replaced or maintained, the battery cell module in the accommodating cavity can be operated only by opening the cover plate assembly from the side face, the operation is simple and convenient, and rapid battery replacement operation can be realized.

Description

Technical Field

[0001] This application belongs to the technical field of batteries, and particularly relates to a battery pack and a vehicle. Background Art

[0002] Lithium-ion batteries are often used as power batteries for new energy vehicles because of their small size and low environmental pollution. A battery pack usually consists of several battery modules, a box tray, and a box cover. The general assembly method is as follows: Place several battery modules on the box tray and fix them, then fix the box cover to the box tray with screws, and then install and fix the battery pack to the bottom of the vehicle frame. However, with this structure, when the battery pack needs to be repaired or replaced, the entire battery pack needs to be disassembled from the bottom of the vehicle frame before the repair and replacement of the battery pack can be carried out, which is complex in operation and high in cost. Summary of the Invention

[0003] This application aims to provide a battery pack and a vehicle, which can solve the problems of complex operation and high cost when repairing and replacing the battery pack in the prior art.

[0004] To solve the above technical problems, this application is implemented as follows:

[0005] In a first aspect, an embodiment of this application provides a battery pack, including: a housing, a battery cell module, and a cover plate assembly; a receiving cavity is provided in the housing, the battery cell module is arranged in the receiving cavity, an opening communicating with the receiving cavity is provided on the side of the housing, the cover plate assembly covers the opening, and the cover plate assembly is detachably connected to the housing.

[0006] Optionally, a partition plate is provided in the receiving cavity to divide the receiving cavity into a plurality of spaced chambers, and the battery cell module is arranged in each chamber, and the battery cell module is detachably connected to the housing.

[0007] Optionally, the cover plate assembly includes a cover plate, a bus bar, and a plurality of elastic conductive members. The cover plate covers the opening, the cover plate is detachably connected to the housing, the bus bar is arranged in the cover plate, one end of the elastic conductive member is connected to the bus bar, and the other end of the elastic conductive member is electrically connected to the battery cell module, and each elastic conductive member corresponds to one battery cell module.

[0008] Optionally, the elastic conductive member includes a conductive column and an elastic member. One end of the elastic member is connected to the bus bar, the other end of the elastic member is connected to the conductive column, and the conductive column is electrically connected to the battery cell module.

[0009] Optionally, the cover plate assembly includes a cover plate, the cover plate is sealed at the opening, a collecting cavity is further provided in the cover plate, a heat exchange channel is provided in the battery cell module, and the collecting cavity is connected to the heat exchange channel.

[0010] Optionally, the battery cell module includes a battery cell group and a heat exchange plate, the battery cell group is arranged on the heat exchange plate, the heat exchange plate is provided with the heat exchange channel, a first connecting part is provided on the heat exchange plate, the first connecting part is plugged into the cover plate, a first flow channel is provided in the first connecting part, and the first flow channel connects the heat exchange channel and the collecting chamber; and / or, a second connecting part is provided on the cover plate, the second connecting part is plugged into the heat exchange plate, a second flow channel is provided in the second connecting part, and the second flow channel connects the heat exchange channel and the collecting chamber.

[0011] Optionally, the battery pack further includes a guide member, and the accommodating cavity has relative upper cavity wall and lower cavity wall along the height direction of the battery pack, the guide member is arranged on the lower cavity wall, the guide member is fixedly connected to the shell, the heat exchange plate is slidably connected to the guide member, and an isolation gap is formed between the heat exchange plate and the lower cavity wall.

[0012] Optionally, a first clamping portion is provided at one end of the heat exchange plate close to the opening, the accommodating cavity has a bottom wall arranged opposite to the opening, a second clamping portion is provided on the bottom wall, and the first clamping portion is clamped with the second clamping portion.

[0013] Optionally, the battery pack further includes a limiting member, the accommodating cavity has a bottom wall arranged opposite to the opening, the limiting member is arranged on the bottom wall, the limiting member abuts against the battery cell module, and the limiting member cooperates with the cover plate assembly to limit and fix the battery cell module.

[0014] In a second aspect, an embodiment of the present application proposes a vehicle, comprising: a frame and a battery pack as described in any one of the above items, wherein the battery pack is mounted on a side of the frame, and a side of the shell facing away from the opening is connected to the frame.

[0015] In the present application, a housing cavity is provided in the shell to accommodate the battery cell module, one side of the shell can be used as a mounting surface for mounting to the side of the frame, an opening is provided on the other side of the shell, so that the battery cell module can be placed in or removed from the housing cavity from the opening, and the opening of the housing cavity is sealed by a cover assembly, and the cover assembly is detachably connected to the shell. In this way, when the battery pack is installed on the frame, the battery pack is located on the side of the frame, and the shell adopts a side-opening cover structure, which is convenient for the installation and removal of the battery pack as a whole. At the same time, when the battery cell module needs to be replaced or maintained, the battery cell module in the housing cavity can be operated by simply opening the cover assembly from the side, which is simple and convenient to operate.

[0016] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. Description of the Drawings

[0017] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 is a schematic diagram of the installation structure of the battery pack and the vehicle frame according to an embodiment of the present application;

[0019] Figure 2 is an exploded view of the battery pack according to an embodiment of the present application;

[0020] Figure 3 is a schematic diagram of the installation structure of the battery cell module in the housing according to an embodiment of the present application;

[0021] Figure 4 is a cross-sectional view of the battery pack according to an embodiment of the present application;

[0022] Figure 5 is a partial cross-sectional view of the battery pack according to an embodiment of the present application;

[0023] Figure 6 is a schematic diagram of the housing according to an embodiment of the present application;

[0024] Figure 7 is a schematic diagram of the battery cell module according to an embodiment of the present application;

[0025] Figure 8 is a schematic diagram of the heat exchange plate according to an embodiment of the present application;

[0026] Figure 9 is a schematic diagram of the cover assembly according to an embodiment of the present application;

[0027] Figure 10 is a cross-sectional view of the cover assembly according to an embodiment of the present application;

[0028] Figure 11 is a schematic diagram of the elastic conductive member according to an embodiment of the present application.

[0029] Reference Signs:

[0030] 10: Battery pack; 11: Housing; 11a: First side; 11b: Second side; 110: Accommodation cavity; 1101: Chamber; 111: Opening; 112: Partition board; 113: Second clamping part; 114: Bottom wall; 115: Upper cavity wall; 116: Lower cavity wall; 12: Battery cell module; 121: Battery cell group; 1211: Battery cell; 122: Heat exchange plate; 1221: First connection part; 1222: First clamping part; 123: End plate; 1231: Avoidance opening; 124: Output row; 13: Cover plate assembly; 131: Cover plate; 1311: Current collecting cavity; 1312: Connection hole; 132: Bus bar; 133: Elastic conductive part; 1331: Conductive column; 1332: Elastic part; 14: Guide part; 141: Isolation gap; 15: Limiting part; 20: Frame; X: First direction; Y: Second direction. Detailed implementation manners

[0031] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary only for explaining the present application and should not be construed as limiting the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0032] The terms "first" and "second" in the description and claims of the present application may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more. In addition, "and / or" in the description and claims indicates at least one of the connected objects, and the character " / " generally represents an "or" relationship between the associated objects before and after.

[0033] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present application.

[0034] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0035] The following will specifically describe the battery pack and vehicle provided by the embodiments of the present application with reference to the drawings and through specific embodiments and their application scenarios.

[0036] As Figure 1 and Figure 2 shown, according to some embodiments of the present application, the battery pack 10 includes: a housing 11, a battery cell module 12, and a cover plate assembly 13; an accommodation cavity 110 is provided in the housing 11, the battery cell module 12 is disposed in the accommodation cavity 110, an opening 111 communicating with the accommodation cavity 110 is provided on the side surface of the housing 11, the cover plate assembly 13 is sealed at the opening 111, and the cover plate assembly 13 is detachably connected to the housing 11.

[0037] In the embodiment of the present application, by providing the accommodation cavity 110 in the housing 11 to accommodate the battery cell module 12, one side surface of the housing 11 can be used as an installation surface for installing to the side surface of the vehicle frame 20, and an opening 111 is provided on the other side surface of the housing 11 so that the battery cell module 12 can be loaded into or removed from the accommodation cavity 110 through the opening 111. The cover plate assembly 13 is used to seal the opening 111 of the accommodation cavity 110, and the cover plate assembly 13 is detachably connected to the housing 11. In this way, when the battery pack 10 is installed on the vehicle frame 20, the battery pack 10 is located on the side of the vehicle frame 20, and the housing 11 adopts a side-opening structure, which not only facilitates the overall installation and disassembly of the battery pack 10, but also, when it is necessary to replace or maintain the battery cell module 12, only the cover plate assembly 13 needs to be opened from the side to operate on the battery cell module 12 in the accommodation cavity 110, and the operation is simple and convenient.

[0038] It can be understood that, as Figure 1 shown, the battery pack 10 in the embodiment of the present application can be applied to a vehicle for supplying power to the vehicle. Among them, the first direction X is parallel to the width direction of the vehicle, and the battery pack 10 can be installed on one side of the vehicle frame 20 along the first direction X, which is convenient for the overall installation and disassembly of the battery pack 10 on the vehicle frame 20.

[0039] Specifically, as Figure 2As shown in the figure, the battery pack 10 includes a housing 11 and a battery cell module 12. The housing 11 can be prepared by extrusion molding using an insulating material. An accommodation cavity 110 is formed in the housing 11, and the battery cell module 12 is installed in the accommodation cavity 110. The housing 11 can play the role of carrying, installing, and fixing the battery cell module 12. The housing 11 has a first side 11a and a second side 11b disposed away from each other along the first direction X. When the battery pack 10 is installed on the vehicle frame 20, the first side 11a of the housing 11 serves as the installation surface and is fixedly installed with the side surface of the vehicle frame 20. An opening 111 is provided on the second side 11b of the housing 11 for loading the battery cell module 12 into the accommodation cavity 110 from the opening 111.

[0040] Optionally, as Figure 2 and Figure 6 shown in the figure, a partition plate 112 is provided in the accommodation cavity 110. The partition plate 112 divides the accommodation cavity 110 into a plurality of chambers 1101 arranged at intervals. A battery cell module 12 is provided in each chamber 1101, and the battery cell module 12 is detachably connected to the housing 11.

[0041] In the embodiment of the present application, by providing a partition plate 112 in the accommodation cavity 110 of the housing 11, the accommodation cavity 110 is divided into a plurality of chambers 1101 arranged at intervals by the partition plate 112. A battery cell module 12 is detachably installed in each chamber 1101, which facilitates the replacement and maintenance of the battery cell module 12. At the same time, the partition plate separates the battery cell modules 12 from each other, avoiding the influence of a single battery cell module 12 when it undergoes thermal runaway on other battery cell modules 12.

[0042] Specifically, as Figure 6 shown in the figure, a plurality of partition plates 112 can be provided in the accommodation cavity 110. The plurality of partition plates 112 are arranged at intervals along the second direction Y, and the second direction Y is perpendicular to the first direction X. The accommodation cavity 110 can be divided into a plurality of independent chambers 1101 by the plurality of partition plates 112, so that a plurality of battery cell modules 12 can be installed in the housing 11 at the same time. It can be understood that after the battery pack 10 is installed on the vehicle frame 20, the second direction Y is parallel to the length direction of the vehicle frame.

[0043] In some embodiments, the partition plate 112 can be made of a fireproof material. By providing a partition plate 112 between two adjacent battery cell modules 12, it can play an isolation role between the two adjacent battery cell modules 12, so that when a local battery cell module 12 undergoes thermal runaway, it can play an effective isolation role and avoid the spread of thermal runaway.

[0044] It should be noted that the partition plate 112 can be fixedly connected to the housing 11 by welding or other means, or can be detachably connected to the housing 11 by snap connection or other means. Of course, the specific connection method between the partition plate 112 and the housing 11 can be flexibly set according to the actual situation and will not be limited here.

[0045] Optionally, as Figure 4 , Figure 9 , Figure 10 shown, the cover plate assembly 13 includes a cover plate 131, a bus bar 132 and a plurality of elastic conductive members 133. The cover plate 131 covers the opening 111. The cover plate 131 is detachably connected to the housing 11. The bus bar 132 is arranged in the cover plate 131. One end of the elastic conductive member 133 is connected to the bus bar 132, and the other end of the elastic conductive member 133 is electrically connected to the battery cell module 12. Each elastic conductive member 133 corresponds to one battery cell module 12.

[0046] In the embodiment of the present application, by making the cover plate 131 detachably connected to the housing 11, it is convenient to open the accommodation cavity 110 from the side of the housing 11 to replace and maintain the battery cell module 12 in the accommodation cavity 110. At the same time, a bus bar 132 is arranged in the housing 11. The bus bar 132 is electrically connected to a plurality of battery cell modules 12 in the housing 11 through a plurality of elastic conductive members 133 respectively, so as to use the bus bar 132 to play a role in collecting the current of the plurality of battery cell modules 12.

[0047] Specifically, a cover plate 131 is arranged at the opening 111. The cover plate 131 and the housing 11 can be connected by detachable connection methods such as screw connection, bolt connection, snap connection, etc. A bus bar 132 is arranged in the cover plate 131. The bus bar 132 can be selected as a conductive structural member, and a plurality of elastic conductive members 133 arranged at intervals are arranged on the side of the cover plate 131 facing the battery cell module 12. Each battery cell module 12 is electrically connected to the bus bar 132 through the corresponding elastic conductive member 133. Furthermore, the bus bar 132 can be used to collect the current of the plurality of battery cell modules 12 to export the current of the battery cell module 12 and then supply power to the vehicle.

[0048] In a specific embodiment, the bus bar 132 can be strip-shaped. The extending direction of the strip-shaped bus bar 132 in the cover plate 131 is consistent with the arrangement direction of the plurality of battery cell modules 12 in the battery cell module 12. Furthermore, an elastic conductive member 133 is arranged between the bus bar 132 and each battery cell module 12 to facilitate connecting the corresponding battery cell module 12 and the bus bar 132 by using the elastic conductive member 133.

[0049] Among them, the battery cell module 12 may include a heat exchange plate 122, a plurality of battery cells 1211, two end plates 123, and an output row 124. The plurality of battery cells 1211 are arranged on the heat exchange plate 122 to form a battery cell group 121. The battery cells 1211 are adhesively fixed to the heat exchange plate 122, and heat exchange can be performed between the battery cells 1211 through the heat exchange plate 122. The two end plates 123 are arranged on both sides of the battery cell group 121 along the first direction X to clamp and fix the battery cell group 121. The output row 124 is arranged on the side of the battery cell group 121 facing away from the heat exchange plate 122, and the output row 124 is electrically connected to the plurality of battery cells 1211 respectively to realize the series-parallel connection of the plurality of battery cells 1211.

[0050] Furthermore, an avoidance opening 1231 is provided in the end plate 123 on the side of the battery cell module 12 facing the cover plate 131. The output row 124 is exposed at the avoidance opening 1231. When the cover plate 131 covers the opening 111 of the housing 11, one end of the elastic conductive member 133 away from the bus bar 132 extends into the avoidance opening 1231 to contact the output row 124 in the battery cell module 12, and the output row 124 is electrically connected to the bus bar 132 through the elastic conductive member 133.

[0051] Among them, two elastic conductive members 133 can be provided at the corresponding positions of each battery cell module 12, one of which is electrically connected to the output row 124 at the positive end of the battery cell module 12, and the other is electrically connected to the output row 124 at the negative end of the battery cell module 12.

[0052] Optionally, as Figure 11 shown, the elastic conductive member 133 includes a conductive column 1331 and an elastic member 1332. One end of the elastic member 1332 is connected to the bus bar 132, the other end of the elastic member 1332 is connected to the conductive column 1331, and the conductive column 1331 is electrically connected to the battery cell module 12.

[0053] In the embodiment of the present application, one end of the conductive column 1331 is elastically connected to the bus bar 132 through the elastic member 1332, and the other end of the conductive column 1331 is electrically connected to the battery cell module 12. By providing the elastic member 1332 between the conductive column 1331 and the bus bar 132, not only can the electrical connection between the conductive column 1331 and the bus bar 132 be realized, but also the buffering effect between the conductive column 1331 and the bus bar 132 can be achieved.

[0054] Specifically, the elastic member 1332 has the ability of elastic deformation. When the cover plate 131 covers the opening 111 of the housing 11, the conductive post 1331 abuts against the output row in the battery cell module 12. At this time, through the elastic deformation of the elastic member 1332, the elastic restoring force of the elastic member 1332 can provide a pre-tightening force to the conductive post 1331, so that the conductive post 1331 is in full contact with the output row in the battery cell module 12. At the same time, since the elastic member 1332 has deformability, when installing the cover plate 131, the rigid abutment between the conductive post 1331 and the battery cell module 12 can be avoided, which plays a role in protecting the battery cell module 12.

[0055] Both the elastic member 1332 and the conductive post 1331 are made of conductive materials. For example, the elastic member 1332 can be a metal spring, and the conductive post 1331 can be a metal post. Of course, the specific materials and structures of the elastic member 1332 and the conductive post 1331 can be flexibly set according to actual needs and are not limited herein.

[0056] Optionally, as Figure 4 shown, the cover plate assembly 13 includes a cover plate 131 which covers the opening 111. A current collecting cavity 1311 is further provided in the cover plate 131. A heat exchange channel is provided in the battery cell module 12, and the current collecting cavity 1311 is communicated with the heat exchange channel to supply a heat exchange medium to the heat exchange channel through the current collecting cavity 1311.

[0057] In the embodiment of the present application, by providing the current collecting cavity 1311 in the cover plate 131 and communicating the current collecting cavity 1311 with the heat exchange channel in the battery cell module 12, and then connecting the current collecting cavity 1311 in the cover plate 131 with an external heat exchange medium system, a heat exchange medium can be supplied into the heat exchange channel of the battery cell module 12 through the current collecting cavity 1311 to achieve cooling of the battery cell module 12.

[0058] It can be understood that a plurality of battery cell modules 12 can be provided in the housing 11. A heat exchange channel is provided in each battery cell module 12. The cover plate 131 covers the opening 111 of the housing 11, and the heat exchange channel of each battery cell module 12 is communicated with the current collecting cavity 1311 in the cover plate 131, so as to supply a heat exchange medium to a plurality of battery cell modules 12 simultaneously by using the current collecting cavity 1311.

[0059] Optionally, as Figure 4 、 Figure 7 、 Figure 9As shown in the figure, the battery cell module 12 includes a battery cell group 121 and a heat exchange plate 122. The battery cell group 121 is disposed on the heat exchange plate 122. A heat exchange channel is provided in the heat exchange plate 122. A first connection portion 1221 is provided on the heat exchange plate 122. The first connection portion 1221 is inserted into the cover plate 131. A first flow channel is provided in the first connection portion 1221, and the first flow channel communicates with the heat exchange channel and the current collecting cavity 1311; and / or, a second connection portion is provided on the cover plate 131, the second connection portion is inserted into the heat exchange plate 122, and a second flow channel is provided in the second connection portion, and the second flow channel communicates with the heat exchange channel and the current collecting cavity 1311.

[0060] Specifically, as Figure 7 shown, the first connection portion 1221 may be a connector. A first flow channel is provided in the connector. As Figure 9 shown, a connection hole 1312 communicating with the current collecting cavity 1311 is provided in the cover plate 131. The connector is inserted into the connection hole 1312, and the current collecting cavity 1311 communicates with the heat exchange channel through the flow channel in the connector.

[0061] Of course, a connector may also be provided in the cover plate 131, that is, the second connection portion is a connector. Then, a connection hole is provided in the heat exchange plate 122. The connector in the cover plate 131 is inserted into the connection hole in the heat exchange plate 122 to communicate the heat exchange channel and the current collecting cavity 1311 through the connector. Other insertion structures may also be adopted between the heat exchange plate 122 and the cover plate 131 to facilitate the quick loading and unloading of the cover plate 131 and the heat exchange plate 122. The specific insertion structure may be flexibly set according to actual needs and is not limited herein.

[0062] In the embodiment of the present application, the battery cell group 121 is fixedly installed on the heat exchange plate 122. A heat exchange channel is provided in the heat exchange plate 122. By using the first connection portion 1221 on the heat exchange plate 122 to be inserted and matched with the cover plate 131, or by using the second connection portion on the cover plate 131 to be inserted into the heat exchange plate 122, the heat exchange plate 122 and the cover plate 131 can be quickly connected, so that a heat exchange medium is supplied from the current collecting cavity 1311 to the heat exchange channel, and the heat exchange medium flows through the heat exchange channel to exchange heat with the battery cell group 121, facilitating the quick installation and disassembly of the cover plate 131 and the heat exchange plate 122.

[0063] It can be understood that, as Figure 4 shown, in the present application, by integrating the bus bar 132 and the current collecting cavity 1311 in the cover plate 131 at the same time, the bus bar 132 is electrically connected to the battery cell module 12 through the elastic conductive member 133. The current collecting cavity 1311 in the cover plate 131 communicates with the heat exchange plate 122 through the connector (that is, the first connection portion 1221). Then, when replacing or maintaining the battery cell module 12, by opening the cover plate 131 from the side of the housing 11, the high voltage and the heat exchange medium can be cut off at the same time, ensuring the operation safety and at the same time helping to improve the replacement efficiency.

[0064] It should be noted that the current collecting cavity 1311 in the cover plate 131 can be a cavity structure directly formed within the cover plate 131 or a pipe structure embedded in the housing. The specific structure of the current collecting cavity 1311 can be flexibly set according to actual needs and will not be limited here.

[0065] Taking the example that the connector is provided in the heat exchange plate 122 and the connection hole is provided in the cover plate 131, the connection structure between the cover plate 131 and the heat exchange plate 122 will be described below. Of course, it is also possible to provide the connector in the cover plate 131 and the connection hole in the heat exchange plate 122, and the principle is the same as or similar to that of providing the connector in the heat exchange plate 122, which will not be elaborated here.

[0066] In a specific application, a plurality of chambers 1101 are provided in the housing 11, and a battery cell module 12 is provided in each chamber 1101. The battery cell module 12 includes a heat exchange plate 122. A plurality of battery cells 1211 are arranged on the heat exchange plate 122 to form a battery cell group 121. A heat exchange channel is provided in the heat exchange plate 122. One end of the heat exchange plate 122 facing the cover plate 131 is provided with two connectors. One connector is connected to the input end of the heat exchange channel, and the other connector is connected to the output end of the heat exchange channel.

[0067] Correspondingly, two mutually isolated current collecting cavities 1311 are provided in the cover plate 131. One is an inlet cavity and the other is an outlet cavity. The input end of the heat exchange channel is communicated with the inlet cavity through the corresponding connector, and the output end of the heat exchange channel is communicated with the outlet cavity through the corresponding connector. Both the inlet cavity and the outlet cavity are communicated with an external heat exchange medium supply system. Thus, the heat exchange medium is supplied to the heat exchange plates 122 of a plurality of battery cell modules 12 simultaneously from the inlet cavity. After the heat exchange medium flows through the heat exchange channel in the heat exchange plate 122 and exchanges heat with the battery cell group 121, it then flows out from the outlet cavity, thereby forming a heat exchange loop.

[0068] It can be understood that with the structure of the battery pack 10 in the present application, when it is necessary to replace or maintain the battery cell module 12 in the housing 11, only the cover plate 131 needs to be disassembled to disconnect the supply of the heat exchange medium to the heat exchange plate 122 in the battery cell module 12. The operation is simple and convenient, and the safety is relatively high.

[0069] In some embodiments, the two connectors on the heat exchange plate 122 include a first connector and a second connector. The end of the first connector away from the heat exchange plate 122 and the end of the second connector away from the heat exchange plate 122 are designed with a structure where they are staggered in height. That is, along the third direction, the distance from the end of the first connector away from the heat exchange plate 122 to the heat exchange plate 122 is not equal to the distance from the end of the second connector away from the heat exchange plate 122 to the heat exchange plate 122. The third direction is perpendicular to the first direction X and the second direction Y respectively. By setting the first connector and the second connector to be staggered in height, it is convenient for the connection of the first connector and the second connector to the introduction cavity and the export cavity in the cover plate 131.

[0070] In some other embodiments, the connection holes in the cover plate 131 include a first connection hole and a second connection hole. The cover plate 131 is provided with a plurality of first connection holes and a plurality of second connection holes. The plurality of first connection holes are respectively communicated with the introduction cavity in the housing 11, and the plurality of second connection holes are respectively communicated with the export cavity in the housing 11. The first connector on the heat exchange plate 122 is inserted into the first connection hole, and the second connector on the heat exchange plate 122 is inserted into the second connection hole.

[0071] Furthermore, the centers of the plurality of first connection holes can be set to be collinear, and the centers of the plurality of second connection holes can be set to be collinear. In this way, it is not only convenient for the processing of the connection holes in the cover plate 131, but also can improve the space utilization rate in the cover plate 131, making the structural layout in the cover plate 131 more compact. In addition, when the cover plate 131 is connected to the housing 11, it is convenient for the connectors on the heat exchange plate 122 to be accurately aligned with the connection holes in the cover plate 131.

[0072] Optionally, as Figure 3 shown, the battery pack 10 further includes a guide member 14. Along the height direction of the battery pack, the accommodation cavity (11) has opposite upper cavity walls 115 and lower cavity walls 116. The guide member 14 is provided on the lower cavity wall 116. The guide member 14 is fixedly connected to the housing 11. The heat exchange plate 122 is slidably connected to the guide member 14, and an isolation gap 141 is formed between the heat exchange plate 122 and the lower cavity wall 116. Among them, the height direction of the battery pack is consistent with the height direction of the vehicle frame 20.

[0073] In the embodiments of the present application, by providing the guide member 14 at the bottom of the accommodation cavity 110 in the housing 11, at least a part of the heat exchange plate 122 contacts the guide member 14, and the heat exchange plate 122 can slide relative to the guide member 14, thereby facilitating the overall pushing or removing of the battery cell module 12 from the accommodation cavity 110. At the same time, by providing the guide member 14, an isolation gap 141 can be formed between the heat exchange plate 122 and the lower cavity wall 116 of the housing 11 to prevent the heat exchange plate 122 from directly contacting the housing 11, reducing the heat exchange between the heat exchange plate 122 and the housing 11, and thus improving the heat exchange effect between the heat exchange plate 122 and the battery cell group 121.

[0074] In some embodiments, the guide member 14 can be made of a wear-resistant material with a low thermal conductivity. For example, it can be made of materials such as polytetrafluoroethylene, polyether ether ketone, and vinylidene fluoride. Among them, the conductivity of the guide member 14 is not greater than 0.12 W / (m·K). By arranging the guide member 14 between the battery cell module 12 and the housing 11, it is convenient for the installation and disassembly of the battery cell module 12, and can also play an insulating and heat-insulating role between the battery cell module 12 and the housing 11.

[0075] Optionally, as Figure 4 and Figure 8 shown, one end of the heat exchange plate 122 far away from the opening 111 is provided with a first clamping portion 1222. The accommodating cavity 11 has a bottom wall 114 disposed opposite to the opening 111, and a second clamping portion 113 is provided on the bottom wall 114. The first clamping portion 1222 is clamped with the second clamping portion 113 to detachably connect the battery cell module 12 and the housing 11.

[0076] In the embodiments of the present application, by providing the first clamping portion 1222 at one end of the heat exchange plate 122 far away from the opening 111 and providing the second clamping portion 113 on the bottom wall 114 of the housing 11, the first clamping portion 1222 is clamped with the second clamping portion 113 to realize the limit fixation of the battery cell module 12 and the housing 11, which is convenient for the installation and disassembly of the battery cell module 12.

[0077] In some embodiments, the first clamping portion 1222 can be a clamping groove provided on the heat exchange plate 122, and the second clamping portion 113 can be a clamping platform provided on the bottom wall 114 of the housing 11. When the battery cell module 12 is installed in the housing 11, the connection and fixation between the heat exchange plate 122 and the housing 11 are realized through the clamping groove on the heat exchange plate 122 and the clamping platform on the housing 11.

[0078] In other embodiments, the first clamping portion 1222 can be a clamping platform provided on the heat exchange plate 122, and the second clamping portion 113 can be a clamping groove provided on the bottom wall 114 of the housing 11. When the battery cell module 12 is installed in the housing 11, the connection and fixation between the heat exchange plate 122 and the housing 11 are realized through the clamping platform on the heat exchange plate 122 and the clamping groove on the housing 11.

[0079] Of course, the first clamping portion 1222 and the second clamping portion 113 can also adopt other clamping structures, and the embodiments of the present application do not limit this here.

[0080] In some embodiments, fixing holes can be provided at one end of the heat exchange plate 122 facing the opening 111. After the battery cell module 12 is installed in the housing 11, fasteners such as screws or bolts can be used to pass through the fixing holes and connect and fix with the housing 11 to install and fix the battery cell module 12 and the housing 11, thereby improving the connection firmness between the battery cell module 12 and the housing 11.

[0081] Optionally, as Figure 4 and Figure 5 shown, the battery pack 10 further includes a limiting member 15. The accommodating cavity 110 has a bottom wall 114 disposed opposite to the opening 111. The limiting member 15 is disposed on the bottom wall 114. The limiting member 15 abuts against the battery cell module 12, and the limiting member 15 cooperates with the cover plate assembly 13 to form a limit fixation for the battery cell module 12 along the first direction X.

[0082] In the embodiment of the present application, by providing the limiting member 15 on the bottom wall 114 of the accommodating cavity 110, after the battery cell module 12 is loaded into the accommodating cavity 110 and the cover plate assembly 13 is installed, the cover plate assembly 13 and the limiting member 15 can form a clamping fixation for the battery cell module 12 from both sides along the first direction X, preventing the battery cell module 12 from having a large displacement during the use of the battery pack 10, which helps to improve the safety of the battery pack 10.

[0083] Specifically, a partition plate 112 is provided in the accommodating cavity 110 of the housing 11 to divide the accommodating cavity 110 into a plurality of chambers 1101 arranged at intervals. A limiting member 15 is provided at the bottom of each chamber 1101. When the cover plate 131 covers the opening 111, at this time, the battery cell module 12 is located in the chamber 1101. The elastic conductive member 133 in the cover plate 131 abuts against one side of the battery cell module 12 along the first direction X, and the limiting member 15 abuts against the other side of the battery cell module 12 along the first direction X. In this way, through the cooperation of the limiting member 15 and the cover plate 131, the battery cell module 12 can be clamped and fixed from both sides along the first direction X, realizing the limiting and fixing effect on the battery cell module 12 along the first direction X.

[0084] Among them, the limiting member 15 can be a boss structure protruding from the bottom wall 114 of the accommodating cavity 110 into the accommodating cavity 110, and the boss structure and the housing 11 are an integrally formed structure; alternatively, the limiting member 15 and the housing 11 are a split structure, and the limiting member 15 is obtained by separate processing and then installed and fixed on the inner wall of the housing 11. The specific structure and installation position of the limiting member 15 can be flexibly set according to actual situations and are not limited herein.

[0085] Optionally, as Figure 1 shown, the embodiment of the present application provides a vehicle, including: a vehicle frame 20 and the battery pack 10 in the above embodiment. The battery pack 10 is installed on the side of the vehicle frame 20. The side of the housing 11 departing from the opening 111 is connected to the vehicle frame 20, and the vehicle can be powered by the battery pack 10.

[0086] In the embodiment of the present application, a receiving cavity 110 is provided in the housing 11 to receive the battery cell module 12. One side surface of the housing 11 can be used as a mounting surface for mounting to the side surface of the vehicle frame 20. An opening 111 is provided on another side surface of the housing 11 so that the battery cell module 12 can be loaded into or removed from the receiving cavity 110 through the opening 111. The cover plate assembly 13 is used to cover the opening 111 of the receiving cavity 110, and the cover plate assembly 13 is detachably connected to the housing 11. In this way, when the battery pack 10 is mounted on the vehicle frame 20, the battery pack 10 is located on the side of the vehicle frame 20, and the housing 11 adopts a side-opening structure, which is convenient for the overall installation and disassembly of the battery pack 10. At the same time, when it is necessary to replace or maintain the battery cell module 12, the cover plate assembly 13 can be simply opened from the side to operate on the battery cell module 12 in the receiving cavity 110, and the operation is simple and convenient.

[0087] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0088] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that, Comprising: A housing (11), a battery cell module (12), and a cover assembly (13); An accommodation cavity (111) is provided inside the housing (11), the battery cell module (12) is disposed inside the accommodation cavity (111), an opening (111) communicating with the accommodation cavity (111) is provided on the side surface of the housing (11), the cover assembly (13) seals the opening (111), and the cover assembly (13) is detachably connected to the housing (11).

2. The battery pack according to claim 1, wherein A partition plate (112) is provided inside the accommodation cavity (111) to divide the accommodation cavity (111) into a plurality of spaced chambers, and the battery cell module (12) is provided in each chamber, and the battery cell module (12) is detachably connected to the housing (11).

3. The battery pack according to claim 2, wherein The cover assembly (13) includes a cover plate (131), a bus bar (132), and a plurality of elastic conductive members (133). The cover plate (131) seals the opening (111), the cover plate (131) is detachably connected to the housing (11), the bus bar (132) is disposed in the cover plate (131), one end of the elastic conductive member (133) is connected to the bus bar (132), and the other end of the elastic conductive member (133) is electrically connected to the battery cell module (12), and each elastic conductive member (133) corresponds to one battery cell module (12).

4. The battery pack according to claim 3, wherein The elastic conductive member (133) includes a conductive post (1331) and an elastic member (1332). One end of the elastic member (1332) is connected to the bus bar (132), the other end of the elastic member (1332) is connected to the conductive post (1331), and the conductive post (1331) is electrically connected to the battery cell module (12).

5. The battery pack according to any one of claims 1-4, characterized in that, The cover assembly (13) includes a cover plate (131). The cover plate (131) seals the opening (111), and a current collecting cavity (1311) is further provided in the cover plate (131). A heat exchange channel is provided in the battery cell module (12), and the current collecting cavity (1311) communicates with the heat exchange channel.

6. The battery pack according to claim 5, wherein The battery cell module (12) includes a battery cell group (121) and a heat exchange plate (122). The battery cell group (121) is disposed on the heat exchange plate (122). The heat exchange channel is provided in the heat exchange plate (122). A first connecting portion (1221) is provided on the heat exchange plate (122), and the first connecting portion (1221) is inserted into the cover plate (131). A first flow channel is provided in the first connecting portion (1221), and the first flow channel communicates the heat exchange channel and the current collecting cavity (1311); and / or, a second connecting portion is provided on the cover plate (131), the second connecting portion is inserted into the heat exchange plate (122), and a second flow channel is provided in the second connecting portion, and the second flow channel communicates the heat exchange channel and the current collecting cavity (1311).

7. The battery pack according to claim 6, wherein The battery pack further comprises a guide member (14); the accommodating cavity (11) has an upper cavity wall (115) and a lower cavity wall (116) opposite to each other along the height direction of the battery pack; the guide member (14) is arranged on the lower cavity wall (116); the guide member (14) is fixedly connected to the shell (11); the heat exchange plate (122) is slidably connected to the guide member (14); and an isolation gap is formed between the heat exchange plate (122) and the lower cavity wall (116).

8. The battery pack according to claim 6, characterized in that, A first clamping portion (1222) is provided at one end of the heat exchange plate (122) away from the opening (111); the accommodating cavity (111) has a bottom wall (114) arranged opposite to the opening (111); a second clamping portion (113) is provided on the bottom wall (114); and the first clamping portion (1222) is clamped with the second clamping portion (113).

9. The battery pack according to claim 1, characterized in that, The battery pack further comprises a limiting member (15); the accommodating cavity (11) comprises a bottom wall (114) arranged opposite to the opening (111); the limiting member (15) is arranged on the bottom wall (114); the limiting member (15) abuts against the battery cell module (12); and the limiting member (15) cooperates with the cover plate assembly (13) to limit and fix the battery cell module (12).

10. A vehicle, characterized in that, include: A vehicle frame (20) and a battery pack as claimed in any one of claims 1 to 9, wherein the battery pack is mounted on a side of the vehicle frame (20), and a side of the housing (11) facing away from the opening (111) is connected to the vehicle frame (20).

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