CN218005095U - Battery pack - Google Patents

Abstract

The utility model provides a battery pack, include: a battery module; the first shell is arranged at the bottom of the battery module, and one end of the battery module is connected with the first shell; the second shell is arranged at the top of the battery module, the other end of the battery module is connected with the second shell, the second shell is connected with the first shell to form a mounting cavity in a surrounding mode, and the battery module is arranged in the mounting cavity; wherein a side of the second housing remote from the first housing is connected with at least part of a frame of the vehicle such that the second housing forms a floor of a body of the vehicle. Through the technical scheme provided by the utility model, can solve the higher technical problem of the focus height of whole car among the prior art.

Description

Battery pack

Technical Field

The utility model relates to a battery package technical field particularly, relates to a battery package.

Background

At present, a battery pack structure is generally installed on a new energy vehicle to provide power energy for the vehicle through the battery pack. The prior art battery pack is generally mounted to the bottom of the vehicle body and is located under the floor of the vehicle body. By adopting the installation mode, sufficient installation space is often required to be arranged below the floor of the vehicle body, so that the battery pack structure is conveniently installed in the installation space.

However, the structural arrangement often makes the floor height of the vehicle body higher, and also makes the gravity center height of the whole vehicle higher.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a battery pack to solve the technical problem of high gravity center of the entire car in the prior art.

In order to achieve the above object, the present invention provides a battery pack, including: a battery module; the first shell is arranged at the bottom of the battery module, and one end of the battery module is connected with the first shell; the second shell is arranged at the top of the battery module, the other end of the battery module is connected with the second shell, the second shell is connected with the first shell to form a mounting cavity in a surrounding mode, and the battery module is arranged in the mounting cavity; wherein a side of the second housing remote from the first housing is connected with at least part of a frame of the vehicle such that the second housing forms a floor of a body of the vehicle.

Further, be provided with the installing port on the second casing, the battery package still includes: the electrical system is connected with the battery module and is arranged at the mounting opening; and the third shell is detachably arranged at the mounting opening so as to cover or open the mounting opening.

Furthermore, the electric system protrudes from the installation opening, the third shell comprises a first connecting shell and a second connecting shell which are connected with each other, the first connecting shell is connected with the periphery of the installation opening, and the second connecting shell protrudes from the third shell.

Further, the battery module is at least two, and the electric core connected mode of two at least battery modules is different, and two at least battery modules all are connected with electrical system, and electrical system is used for adjusting the output voltage size of battery package.

Further, the battery pack further includes: the battery management system is arranged opposite to at least part of the mounting opening, the battery management system is arranged at the end part of the battery module, and the positive pole of the battery pack and the negative pole of the battery pack are respectively arranged at two sides of the battery management system.

Further, the battery management system includes: the voltage acquisition board and the temperature acquisition board are both arranged at the end part of the battery module; the main board body is arranged on the voltage acquisition board and the temperature acquisition board and is positioned above the voltage acquisition board and the temperature acquisition board.

Further, the battery module includes: the battery comprises a plurality of battery cells, a plurality of battery cells and a plurality of battery cells, wherein the battery cells are arranged in an array; the battery cell fixing device comprises a support frame, wherein a plurality of battery cells are supported on the support frame, the support frame is provided with a plurality of mounting holes, the plurality of mounting holes are arranged in one-to-one correspondence with the plurality of battery cells, and each battery cell of the plurality of battery cells is arranged in the corresponding mounting hole of the corresponding plurality of mounting holes.

Further, the support frame includes: the mounting hole group comprises a plurality of mounting holes which are arranged at intervals along a second preset direction; the partition plate is arranged on the supporting plate body and protrudes out of the supporting plate body, the partition plate is arranged between every two adjacent mounting hole groups, and the shape of the partition plate is matched with that of the mounting holes.

Further, the battery module includes a plurality of electric cores, and a plurality of electric cores have along the first a plurality of electric core groups of presetting the direction interval and arranging, and the electric core group includes a plurality of electric cores that preset the direction interval along the second and set up, and the battery module still includes:

the water cooling plate is inserted between two adjacent electric core groups, the water cooling plate is U-shaped or S-shaped, the inlet end of the water cooling plate, the outlet end of the water cooling plate and the thermal management system are both positioned at one end of the battery module, which is far away from the electric system, and the water cooling plate is connected with the thermal management system; and/or the presence of a gas in the gas,

the fireproof part is arranged between every two adjacent electric core groups; and/or the presence of a gas in the gas,

the bus bar and the copper bar are arranged above the battery module, and the copper bar is connected with the bus bar; and/or the presence of a gas in the gas,

the side plates are arranged on the side portions of the plurality of electric cores and extend along the second preset direction, and the shape of each side plate is matched with that of the electric core group.

Further, the battery pack further includes: the connecting bracket is welded on one side of the second shell, which is far away from the first shell, and the second shell is connected with the frame through the connecting bracket; and/or the presence of a gas in the gas,

the mica plate is arranged between the battery module and the first shell, and the bottom of the battery module is connected with the first shell through the mica plate; and/or the presence of a gas in the gas,

and the insulating plate is arranged between the battery module and the second shell, and the top of the battery module is connected with the second shell through the insulating plate.

Use the technical scheme of the utility model, can make the second casing of battery package form the floor of automobile body, need not install the battery package in the floor below to the floor that can the wall automobile body sets up the condition of high-altitude, and then also can effectively reduce the height of center of gravity of whole car.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic diagram illustrating an external structure of a battery pack provided according to an embodiment of the present invention;

fig. 2 shows an exploded view of a battery pack provided according to an embodiment of the present invention;

fig. 3 is a schematic diagram illustrating an internal structure of a battery pack provided according to an embodiment of the present invention;

fig. 4 is a schematic structural view illustrating a battery module according to an embodiment of the present invention;

fig. 5 illustrates an exploded view of a battery module provided according to an embodiment of the present invention;

fig. 6 shows a schematic structural diagram of a support frame provided according to an embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. a battery module; 11. an electric core; 12. a support frame; 121. a support plate body; 1211. mounting holes; 122. a partition plate; 13. a water-cooling plate; 14. a thermal management system; 15. a fire-resistant member; 16. a bus bar; 17. copper bars are arranged; 18. a side plate; 19. an FPC acquisition board;

21. a first housing; 22. a second housing; 23. a third housing; 231. a first connecting shell; 232. a second connection housing;

30. an electrical system;

40. a battery management system; 41. a voltage acquisition board; 42. a temperature acquisition plate; 43. a main board body;

50. connecting a bracket;

60. mica plates;

70. an insulating plate;

81. a main positive electrode; 82. a main negative electrode.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1 to 6, an embodiment of the present invention provides a battery pack including a battery module 10, a first case 21, and a second case 22. The first housing 21 is mounted at the bottom of the battery module 10, and one end of the battery module 10 is connected with the first housing 21; the second casing 22 is installed on the top of the battery module 10, the other end of the battery module 10 is connected with the second casing 22, the second casing 22 is connected with the first casing 21 to form a mounting cavity, and the battery module 10 is installed in the mounting cavity. Wherein the side of the second housing 22 remote from the first housing 21 is connected with at least part of the frame of the vehicle such that the second housing 22 forms the floor of the body of the vehicle.

By adopting the structure, the second shell 22 of the battery pack can form the floor of the vehicle body, and the battery pack does not need to be arranged below the floor, so that the situation that the height of the floor of the vehicle body on the wall surface is too high can be realized, and the gravity center height of the whole vehicle can be effectively reduced. Meanwhile, the installation structure can be simplified by adopting the structure.

In this embodiment, the second housing 22 is provided with a mounting opening, the battery pack further includes an electrical system 30 and a third housing 23, the electrical system is connected with the battery module 10, and the electrical system 30 is mounted at the mounting opening. The third housing 23 is detachably mounted at the mounting port to cover or uncover the mounting port. With such a structure, the third housing 23 is detachably mounted at the mounting opening, so that when the electrical system 30 needs to be repaired or maintained, the third housing 23 only needs to be dismounted from the mounting opening, thereby facilitating subsequent maintenance and repair.

Specifically, the electrical system 30 is disposed to protrude from the mounting opening, the third housing 23 includes a first connection shell 231 and a second connection shell 232 that are connected to each other, the first connection shell 231 is connected to a periphery of the mounting opening, and the second connection shell 232 protrudes from the third housing 23. By adopting the structure, the electrical system 30 protrudes out of the mounting opening, so that the mounting height of the electrical system 30 can be conveniently increased, and the electrical system 30 can be conveniently maintained.

In this embodiment, the battery module 10 is at least two, and the electric core 11 connected mode of two at least battery modules 10 is different, and two at least battery modules 10 all are connected with electrical system 30, and electrical system 30 is used for adjusting the output voltage size of battery package to be convenient for satisfy different voltage demands. Here, the difference in the connection manner of the cells 11 means that the series-parallel connection manner of the cells 11 is different. Specifically, the number of the battery modules 10 may be two; a battery module 10 is composed of 6 rows of 30 lines of battery cells and is composed into a module structure of 4 parallel 45 strings through a bus bar 16; another battery module 10 is composed of 8 rows and 30 columns of cells, and is composed of a module structure of 4-60 strings by a bus bar 16.

Specifically, the battery pack in this embodiment further includes a battery management system 40, the battery management system 40 is disposed opposite to at least a portion of the mounting opening, the battery management system 40 is disposed at an end portion of the battery module 10, and a positive electrode of the battery pack and a negative electrode of the battery pack are respectively mounted on both sides of the battery management system 40. With such a structural arrangement, it is possible to facilitate optimization of the structural layout of the battery management system 40, the positive electrode, and the negative electrode, and to facilitate centralized operation and management. Specifically, the battery management system 40 may also be subjected to operations such as maintenance and repair by the battery management system 40. Specifically, the positive electrode herein refers to the main positive electrode 81, and the negative electrode refers to the main negative electrode 82.

In this embodiment, the battery management system 40 includes a voltage collecting board 41, a temperature collecting board 42 and a main board body 43, the voltage collecting board 41 and the temperature collecting board 42 are both installed at the end of the battery module 10, the main board body 43 is installed on the voltage collecting board 41 and the temperature collecting board 42, and the main board body 43 is located above the voltage collecting board 41 and the temperature collecting board 42. With such a structural layout, it is possible to improve the compactness of the layout of the battery management system 40 and optimize the internal structural layout of the battery pack. The number of the battery modules 10 in this embodiment is at least two, the number of the battery management systems 40 is at least two, the at least two battery management systems 40 are arranged in one-to-one correspondence with the at least two battery modules 10, and each battery management system 40 is connected with the corresponding battery module 10 so as to perform data acquisition and management on the corresponding battery module 10 through each battery management system 40.

Specifically, the battery module 10 in this embodiment includes a plurality of battery cells 11 and a support frame 12, and the plurality of battery cells 11 are arranged in an array. The plurality of battery cells 11 are supported by the support frame 12, the support frame 12 has a plurality of mounting holes 1211, the plurality of mounting holes 1211 are provided in one-to-one correspondence with the plurality of battery cells 11, and each of the plurality of battery cells 11 is mounted in a corresponding mounting hole 1211 of the corresponding plurality of mounting holes 1211. By adopting the structure, the installation stability of the plurality of battery cells 11 can be improved conveniently, the layout compactness of the plurality of battery cells 11 is improved, and the arrangement of connecting beams and other structures between the battery cells 11 is not needed. Simultaneously, the supporting frame 12 can also effectively support and absorb shock of the battery cell 11, so that impact on the first shell 21 is prevented from being directly transmitted to the battery cell 11, a buffering effect is achieved, and protection of the battery cell 11 is improved.

In this embodiment, the supporting frame 12 includes a supporting plate body 121 and a partition plate 122, a plurality of mounting holes 1211 are disposed on the supporting plate body 121, the plurality of mounting holes 1211 are arranged into a plurality of mounting hole groups spaced along a first predetermined direction, and each mounting hole group includes a plurality of mounting holes 1211 spaced along a second predetermined direction. Partition 122 is provided on support plate 121, partition 122 is provided so as to protrude from support plate 121, partition 122 is provided between two adjacent mounting hole groups, and the shape of partition 122 is adapted to the shape of mounting hole 1211. By adopting the structure, the battery cell 11 can be conveniently separated by the partition plate 122, and the condition of mutual contact and collision between the battery cells 11 is avoided, so that the battery cells 11 can be better protected. In addition, the partition plate 122 can also effectively increase the overall structural strength of the support frame 12, so as to further effectively protect the battery cell 11. The battery cell 11 in this embodiment is a cylindrical structure, the mounting hole 1211 corresponds to a circular hole, and the corresponding partition plate is a wave plate structure having a plurality of circular arcs.

Specifically, the battery module 10 in this embodiment includes a plurality of battery cells 11, and the plurality of battery cells 11 have a plurality of electric core groups arranged at intervals along a first preset direction, and the electric core group includes a plurality of electric cores 11 arranged at intervals along a second preset direction.

Specifically, the battery module 10 further includes a water-cooling plate 13 and a thermal management system 14, the water-cooling plate 13 is inserted between two adjacent electric core groups, the water-cooling plate 13 is U-shaped or S-shaped, the inlet end of the water-cooling plate 13, the outlet end of the water-cooling plate 13 and the thermal management system 14 are both located at one end of the battery module 10 away from the electric system 30, and the water-cooling plate 13 is connected to the thermal management system 14; and/or, the battery module 10 further comprises a fireproof component 15, and the fireproof component 15 is arranged between two adjacent electric core groups; and/or the battery module 10 further comprises a bus bar 16 and a copper bar 17, wherein the bus bar 16 is arranged above the battery module 10, and the copper bar 17 is connected with the bus bar 16; and/or the battery module 10 further comprises an edge plate 18, the side portions of the plurality of battery cells 11 are provided with the edge plate 18, the edge plate 18 extends along the second preset direction, and the shape of the edge plate 18 is matched with that of the battery cell group.

Preferably, the battery module 10 in this embodiment further includes a water-cooling plate 13, a thermal management system 14, a fire-proof component 15, a bus bar 16, a copper bar 17 and a side plate 18, the water-cooling plate 13 is inserted between two adjacent electric core groups, the water-cooling plate 13 is U-shaped or S-shaped, the inlet end of the water-cooling plate 13, the outlet end of the water-cooling plate 13 and the thermal management system 14 are both located at one end of the battery module 10 away from the electrical system 30, and the water-cooling plate 13 is connected with the thermal management system 14, by adopting such a layout manner, the layout of the battery module 10 can be optimized conveniently, the structural compactness of the battery module 10 is improved, and sufficient cooling of the plurality of electric cores 11 in the plurality of electric core groups can be facilitated through a water-cooling plate; meanwhile, the water cooling plate 13 is set to be U-shaped or S-shaped, so that the plurality of electric core groups can be cooled sufficiently through the water cooling plate 13. Be provided with fire prevention piece 15 between two adjacent electric core groups to effectively play the fire prevention effect, fire prevention piece 15 in this embodiment can be for the fire prevention bubble is cotton. Battery module 10 still includes busbar 16 and copper bar 17, and busbar 16 sets up in battery module 10's top, and copper bar 17 is connected with busbar 16 to be connected a plurality of electric cores 11 through busbar 16, so that be connected with other parts through copper bar 17. The battery module 10 further comprises side plates 18, the side portions of the plurality of battery cells 11 are provided with the side plates 18, the side plates 18 extend along a second preset direction, and the shape of the side plates 18 is matched with that of the battery cell groups, so that the battery cell groups are effectively protected, and the structural strength is improved; specifically, the battery cell 11 has a cylindrical structure, and the sideboard 18 may have a wavy plate structure with a plurality of circular arcs.

Specifically, the battery pack further comprises a connecting bracket 50, the connecting bracket 50 is welded on one side of the second shell 22 away from the first shell 21, and the second shell 22 is connected with the frame through the connecting bracket 50; and/or the battery pack further comprises a mica plate 60, wherein the mica plate 60 is arranged between the battery module 10 and the first shell 21, and the bottom of the battery module 10 is connected with the first shell 21 through the mica plate 60; and/or, the battery pack further includes an insulation plate 70, the insulation plate 70 being disposed between the battery module 10 and the second case 22, and the top of the battery module 10 being connected to the second case 22 through the insulation plate 70.

Preferably, the battery pack in this embodiment further includes a connecting bracket 50, a mica plate 60 and an insulating plate 70, the connecting bracket 50 is welded on one side of the second housing 22 away from the first housing 21, and the second housing 22 is connected to the vehicle frame through the connecting bracket 50, so that the connection is convenient, and the connection reliability and the structural strength are improved. The mica plate 60 is disposed between the battery module 10 and the first housing 21, and the bottom of the battery module 10 is connected to the first housing 21 through the mica plate 60, so as to effectively insulate heat. The insulating plate 70 is disposed between the battery module 10 and the second case 22, and the top of the battery module 10 is connected to the second case 22 through the insulating plate 70 to effectively perform an insulating function.

In this embodiment, the battery pack is designed by using a high energy density chemical system and a large cylindrical battery cell 11, so that the energy density of the battery pack is improved; the upper shell (the upper shell is the second shell 22) of the battery pack is integrated with the floor of the whole vehicle and is connected with a cross beam of the vehicle body, so that the gravity center height of the whole vehicle is effectively reduced. The upper shell and the lower shell (the upper shell and the lower shell refer to the first shell 21 and the second shell 22) are both formed by thin-wall metal plates, and the transverse and longitudinal beams are not required to be added for reinforcement, so that the space interest rate in the battery pack reaches over 90 percent, the electric quantity of the whole pack is improved, and the cruising ability of the whole car is further improved. Adopt the structure to glue the bonding with the upper and lower casing of battery package about 10 battery modules, form "sandwich" structure, upper and lower casing supports battery module 10 simultaneously, effectively promotes the rigidity of battery package. The scheme of the highly integrated CTC cylindrical battery pack has the advantages of reducing the height of the mass center of the whole vehicle, improving the electric quantity and the cruising ability of the whole vehicle, improving the rigidity of the battery pack and meeting the requirements of high reliability and safety of the battery pack.

The battery pack in the embodiment can be of a CTC large cylindrical battery pack structure, the upper shell and the lower shell are formed by thin-wall metal plates, and transverse and longitudinal beams are not required to be added for reinforcement. The upper surface and the lower surface of the battery module 10 are bonded with the upper shell and the lower shell of the battery pack by adopting structural adhesive to form a sandwich structure. The flange surface of the battery pack and the whole vehicle connecting bracket 50 of the upper shell are connected with the vehicle body through bolts, and the upper shell replaces the floor of the vehicle body, so that the gravity center height of the whole vehicle is effectively reduced. 2 4P45S and 2 4P60S large cylindrical battery modules 10 form a 28-row and 30-column module of 4P210S in the battery pack, so that the spatial interest rate of the battery pack reaches over 90%. The thermal management system 14 adopts 7 snakelike water cooling plates 13, each snakelike pipe cools and heats 4 rows of electric cores 11, and inlets and outlets of all the water pipes are arranged at the front part of the battery pack. The electric system 30 is arranged on the two layers behind the battery, the total anode and the total cathode are arranged on the left side and the right side of the rear side, the battery pack is bilaterally symmetrically provided with two battery modules 10 of 4P60S and 4P45S, and the middle of the battery pack is connected with the BDU behind through the long copper bar 17, so that the switching between 400V and 800V is realized. BMS board comprises 2 mainboards and 4 slave boards, and 4 slave boards (4 slave boards are two voltage acquisition boards and two temperature acquisition boards 42) are arranged at the rear portion one deck of battery package, mainly are responsible for voltage and temperature acquisition, and 2 mainboards (2 mainboard are the mainboard body 43 that two intervals set up) are arranged on two layers, and casing and last casing adoption bolted connection on two layers of rear portion can be dismantled to maintain and maintain electrical system 30. The upper case surface of the battery module 10 and the bus bars 16 are bonded to the insulating plate 70 by a structural adhesive to perform an insulating function. The insulating plate 70 is then bonded to the upper shell by structural adhesive and transfers the load to the body rails by the connecting brackets 50. The bottom of the cylindrical battery cell 11 is bonded with a plastic support (the plastic support is a support frame 12), the plastic support plays a role in supporting and fixing the battery cell 11, the bottom of the plastic support is bonded with a mica plate 60, the mica plate 60 is bonded with the lower shell, and the load is transmitted to the vehicle body through the flange surface of the lower shell. The explosion-proof valve of the cylindrical battery cell 11 is arranged at the bottom of the battery cell 11, and when the single battery cell 11 is out of control due to heat, the shell is prevented from losing efficacy under the heat insulation effect of the mica plate 60.

Through the integrated whole car floor of last casing, effectively reduced whole car focus height, no horizontal longeron structure in the battery package, package space utilization can reach more than 90%, improves the electricity of battery package by a wide margin, adopts sandwich structure, and effectual load transmission is all realized to upper and lower casing, improves the rigidity of whole package. This patent can furthest utilize the envelope space of battery package to improve the electric quantity, reaches the effect that promotes whole car continuation of the journey ability.

The specific functions and functions of the components of this patent are as follows: the connecting bracket 50 is formed by connecting a sheet metal part and an upper shell in a spot welding manner, and plays a role in transferring the load of the battery pack to a vehicle body beam; the upper shell is connected with the lower shell through bolts and is bonded with the upper part of the module, so that the battery pack is sealed and protected, and the module is supported; the insulating plate 70 is respectively bonded with the upper shell, the battery cell 11 and the busbar 16, so that the effect of preventing the busbar 16 from being insulated from the upper shell is achieved, and the effect of transferring the load of the battery module 10 to the upper shell is achieved; the thermal management system 14 cools and heats all the cylindrical battery cells 11 through the snake-shaped water cooling plate 13, so that the battery cells 11 are in an optimal working temperature range; the module 4P45S 5 enables 6 rows and 30 rows of electric cores 11 to form a module structure of 4 parallel 45 strings through the bus bar 16, and provides energy for the battery pack; the module 4P60S 6 is used for forming a module structure with 4 rows and 60 strings by 8 rows and 30 rows of electric cores 11 through a bus bar 16 and providing energy for a battery pack; the mica plate 60 is positioned between the lower shell and the battery module 10, and plays a role in inhibiting the thermal runaway of the battery cell 11 and protecting the lower shell; the lower shell is connected with the upper shell and the vehicle body through bolts, and the inner surface of the lower shell is bonded with the mica plate 60, so that the battery pack is sealed and protected, and the function of supporting the module is achieved; the electrical system 30 comprises a BDU, a copper bar 17, a wire harness and the like, and has the functions of connecting modules, providing power supply, realizing the switching between 400V and 800V and the like; the BMS (battery management system 40) collects the temperature and the voltage of the battery cell 11, and controls and manages the whole packaging system; the second-layer upper shell (the second-layer upper shell corresponds to the third shell 23) is connected with the upper shell through a bolt, and can be detached, so that the maintenance of the electrical system 30 is facilitated. The copper bar 17 is electrically connected with each battery module 10 to transmit current; the busbar 16 is respectively connected with the positive and negative stages of the battery cell 11 to form a 4-parallel structure; the busbar 16 is respectively connected with the positive and negative stages of the battery cell 11 to form a 4-parallel structure; the water cooling plate 13 is a snake-shaped water cooling plate 13 and is used for cooling and heating the battery cell 11; the fireproof foam plays a role in preventing the single battery cell 11 from being out of control due to heat, and is transferred to the adjacent battery cells 11; the total number of the cylindrical batteries is 840 electric cores 11, and 4P210 strings are formed to provide energy; an energy-absorbing bracket of the battery cell 11 (the energy-absorbing bracket of the battery cell 11 is a support bracket 12) is used for supporting the battery cell 11, and an S-shaped energy-absorbing reinforcing rib (the S-shaped energy-absorbing reinforcing rib is a partition plate 122) is adopted at the bottom to protect the battery; the PC insulating sheet (the PC insulating sheet is the side plate 18) plays a role in supporting the battery cell 11, and the bottom of the PC insulating sheet adopts an S-shaped energy-absorbing reinforcing rib to protect the battery. The FPC collection board 19 collects voltage and temperature of the electric core 11.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: the battery pack adopts a sandwich structure, and the upper shell is integrated with the floor of the whole vehicle, so that the battery pack is highly integrated with the whole vehicle. The gravity center of the whole vehicle can be effectively reduced, the space interest rate in the battery pack can be limited, and the cruising ability of the whole vehicle is improved. The scheme of the highly integrated CTC cylindrical battery pack solves the problems that the space utilization rate of the traditional module battery pack is low, the rigidity of the scheme without the module battery pack is poor, the integration level of the battery pack and the whole battery pack is low and the like. The floor of the whole vehicle is integrated through the upper shell of the battery pack and is connected with the cross beam of the vehicle body, so that the gravity center height of the whole vehicle is effectively reduced; the energy density of the battery pack is improved by adopting a high-energy-density chemical system and a large cylindrical battery cell design; the upper shell and the lower shell are formed by thin-wall metal plates without adding transverse and longitudinal beam reinforcements, so that the space utilization rate in the battery pack reaches over 90 percent, the electric quantity of the whole pack is improved, and the cruising ability of the whole vehicle is improved; all adopt the structure to glue the bonding with the battery package upper and lower casing about the module, constitute "sandwich", upper and lower casing supports the module simultaneously, effectively promotes the rigidity of battery package.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

For ease of description, spatially relative terms such as "over 8230," "upper surface," "above," and the like may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; above" may include both orientations "at 8230; \8230; above" and "at 8230; \8230; below". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A battery pack, comprising:

a battery module (10);

a first case (21) mounted at the bottom of the battery module (10), one end of the battery module (10) being connected to the first case (21);

the second shell (22) is installed at the top of the battery module (10), the other end of the battery module (10) is connected with the second shell (22), the second shell (22) is connected with the first shell (21) to form a mounting cavity in a surrounding mode, and the battery module (10) is installed in the mounting cavity;

wherein a side of the second housing (22) remote from the first housing (21) is connected with at least part of a frame of a vehicle such that the second housing (22) forms a floor of a body of the vehicle.

2. The battery pack according to claim 1, wherein the second case (22) is provided with a mounting port, the battery pack further comprising:

an electrical system (30) connected to the battery module (10), the electrical system (30) being mounted at the mounting opening;

and a third housing (23) detachably mounted at the mounting port to cover or uncover the mounting port.

3. The battery pack according to claim 2, wherein the electrical system (30) is provided to protrude from the mounting opening, and the third housing (23) includes a first connection case (231) and a second connection case (232) connected to each other, the first connection case (231) being connected to a periphery of the mounting opening, and the second connection case (232) being provided to protrude from the third housing (23).

4. The battery pack according to claim 2, wherein the number of the battery modules (10) is at least two, the connection manner of the battery cells (11) of at least two of the battery modules (10) is different, at least two of the battery modules (10) are both connected with the electrical system (30), and the electrical system (30) is used for adjusting the output voltage of the battery pack.

5. The battery pack according to claim 2, further comprising:

the battery management system (40) is arranged opposite to at least part of the mounting opening, the battery management system (40) is arranged at the end part of the battery module (10), and the positive pole of the battery pack and the negative pole of the battery pack are respectively arranged at two sides of the battery management system (40).

6. Battery pack according to claim 5, characterized in that the battery management system (40) comprises:

the voltage acquisition plate (41) and the temperature acquisition plate (42) are arranged at the end part of the battery module (10);

the mainboard body (43) is installed voltage acquisition board (41) with on temperature acquisition board (42), mainboard body (43) is located voltage acquisition board (41) with the top of temperature acquisition board (42).

7. The battery pack according to claim 1, wherein the battery module (10) comprises:

a plurality of cells (11), wherein the plurality of cells (11) are arranged in an array;

the battery cell support comprises a support frame (12), wherein the battery cells (11) are supported on the support frame (12), the support frame (12) is provided with a plurality of mounting holes (1211), the mounting holes (1211) are arranged in one-to-one correspondence with the battery cells (11), and each battery cell (11) of the battery cells (11) is installed in the corresponding mounting hole (1211) of the corresponding mounting holes (1211).

8. The battery pack according to claim 7, wherein the support frame (12) comprises:

the supporting plate body (121), the plurality of mounting holes (1211) are arranged on the supporting plate body (121), the plurality of mounting holes (1211) are arranged into a plurality of mounting hole groups arranged at intervals along a first preset direction, and each mounting hole group comprises a plurality of mounting holes (1211) arranged at intervals along a second preset direction;

the partition plate (122) is arranged on the supporting plate body (121), the partition plate (122) protrudes out of the supporting plate body (121), the partition plate (122) is arranged between every two adjacent mounting hole groups, and the shape of the partition plate (122) is matched with that of the mounting holes (1211).

9. The battery pack according to claim 2, wherein the battery module (10) comprises a plurality of battery cells (11), the plurality of battery cells (11) has a plurality of battery core groups arranged at intervals along a first preset direction, the battery core groups comprise a plurality of battery cells (11) arranged at intervals along a second preset direction, and the battery module (10) further comprises:

the water cooling plate (13) is inserted between two adjacent electric core groups, the water cooling plate (13) is U-shaped or S-shaped, the inlet end of the water cooling plate (13), the outlet end of the water cooling plate (13) and the thermal management system (14) are both positioned at one end, away from the electrical system (30), of the battery module (10), and the water cooling plate (13) is connected with the thermal management system (14); and/or the presence of a gas in the atmosphere,

the fireproof piece (15) is arranged between every two adjacent electric core groups; and/or the presence of a gas in the gas,

the bus bar (16) and the copper bar (17) are arranged above the battery module (10), and the copper bar (17) is connected with the bus bar (16); and/or the presence of a gas in the atmosphere,

the side plates (18) are arranged on the side portions of the plurality of battery cores (11), the side plates (18) extend along the second preset direction, and the shape of the side plates (18) is matched with that of the battery core group.

10. The battery pack of claim 1, further comprising:

the connecting bracket (50) is welded on one side, away from the first shell (21), of the second shell (22), and the second shell (22) is connected with the frame through the connecting bracket (50); and/or the presence of a gas in the gas,

a mica plate (60) disposed between the battery module (10) and the first housing (21), wherein the bottom of the battery module (10) is connected with the first housing (21) through the mica plate (60); and/or the presence of a gas in the gas,

and an insulating plate (70) disposed between the battery module (10) and the second case (22), wherein the top of the battery module (10) is connected to the second case (22) through the insulating plate (70).

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