Battery pack and new energy automobile

Abstract

The embodiment of the utility model provides a battery pack and a new energy automobile, and relates to the technical field of power batteries. The battery pack comprises a lower tray, an upper shell, a plurality of battery packs and a plurality of fixing frames, the plurality of battery packs are stacked on the lower tray, and the battery pack close to one side of the lower tray is adhered to the lower tray; a fixing frame is arranged between two adjacent battery packs, and two opposite sides of the fixing frame are respectively adhered to the two battery packs; the upper shell is provided with a containing cavity, the multiple battery packs are all arranged in the containing cavity, and the upper shell is connected with the lower tray. The battery pack is simple in structure, the assembly efficiency can be improved, and the cost can be reduced.

Description

Technical Field

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

[0002] With the rapid development of new energy vehicles, the development of battery packs as a power source is also getting faster and faster. In the prior art, for the assembly of battery packs, the battery cells are usually assembled into battery modules, and then the battery modules are assembled into battery packs.

[0003] However, this type of battery pack assembled through battery molds requires the use of a large number of structural parts such as cross beams, longitudinal beams, end plates, long screws, etc. for fixation, resulting in a large number of battery pack parts, a complex overall structure, cumbersome assembly and high cost. Utility Model Content

[0004] The purpose of the utility model is to provide a battery pack and a new energy vehicle, which have a simple structure, can improve assembly efficiency and reduce costs.

[0005] The embodiment of the utility model is achieved as follows:

[0006] In a first aspect, the utility model provides a battery pack, comprising:

[0007] Lower tray;

[0008] A plurality of battery packs, wherein the plurality of battery packs are stacked on the lower tray, and the battery packs close to one side of the lower tray are bonded to the lower tray;

[0009] A plurality of fixing frames, each of which is provided between two adjacent battery packs, and opposite sides of the fixing frames are respectively bonded to the two battery packs; and

[0010] The upper shell is provided with a receiving cavity, the plurality of battery packs are all arranged in the receiving cavity, and the upper shell is connected to the lower tray.

[0011] In an optional embodiment, the plurality of battery packs are stacked along a first direction, and each of the battery packs includes a plurality of battery cells arranged along a second direction; the lower tray is provided with a plurality of first mounting portions, the plurality of first mounting portions are arranged along the second direction, and are respectively bonded to the plurality of battery cells close to one side of the lower tray;

[0012] The fixing frame is provided with a plurality of second mounting parts and a plurality of third mounting parts on two opposite sides along the first direction, respectively. The plurality of second mounting parts are arranged along the second direction and are respectively bonded to the plurality of battery cells of one of the battery packs; the plurality of third mounting parts are arranged along the second direction and are respectively bonded to the plurality of battery cells of another adjacent battery pack;

[0013] The first direction and the second direction form an angle.

[0014] In an optional embodiment, the battery pack further includes a first bus bar and a second bus bar both disposed in the accommodating cavity, the first bus bar and the second bus bar are spaced apart along a third direction and are respectively located on opposite sides of the plurality of battery packs, and the first bus bar and the second bus bar are simultaneously connected to the plurality of battery packs;

[0015] The first direction, the second direction and the third direction are perpendicular to each other.

[0016] In an optional embodiment, the battery pack further includes a first protective shell and a second protective shell both disposed in the accommodating cavity, the first protective shell being disposed on a side of the first bus away from the multiple battery packs, and the second protective shell being disposed on a side of the second bus away from the multiple battery packs.

[0017] In an optional embodiment, the lower tray is further provided with a plurality of limit plates, which are spaced apart along the second direction; a plurality of first card slots are formed at one end of the first protective shell close to the lower tray, the plurality of first card slots are spaced apart along the second direction, and are respectively snap-fitted with one end of the plurality of limit plates; a plurality of second card slots are formed at one end of the second protective shell close to the lower tray, the plurality of second card slots are spaced apart along the second direction, and are respectively snap-fitted with the other end of the plurality of limit plates.

[0018] In an optional embodiment, the battery pack further includes a battery management system, which is disposed in the accommodating cavity, and the battery management system is located on a side of the first bus away from the multiple battery packs, or the battery management system is located on a side of the second bus away from the multiple battery packs.

[0019] In an optional embodiment, a plurality of support seats are disposed on the lower tray, the plurality of support seats are arranged at intervals, and the battery management system is simultaneously disposed on the plurality of support seats.

[0020] In an optional embodiment, the battery pack further includes a wiring harness, which is disposed in the accommodating cavity and is connected to the first bus bar and the second bus bar at the same time;

[0021] At least one of the fixing frames has wire harness fixing holes at both ends, and the buckles of the wire harness are arranged in the wire harness fixing holes.

[0022] In an optional embodiment, the plurality of second mounting portions and the plurality of third mounting portions are arranged alternately in sequence along the second direction.

[0023] In an optional embodiment, the battery pack further includes a battery pack explosion-proof valve, and the battery pack explosion-proof valve is disposed on the upper shell.

[0024] In an optional embodiment, the battery pack further includes a buffer pad, which is disposed in the accommodating cavity and is located between the upper shell and the battery pack on a side close to the upper shell.

[0025] In a second aspect, the utility model provides a new energy vehicle, comprising a battery pack as described in any one of the aforementioned embodiments.

[0026] The beneficial effects of the embodiments of the utility model include:

[0027] The battery pack includes a lower tray, an upper shell, a plurality of battery packs and a plurality of fixing frames. The plurality of battery packs are stacked on the lower tray, and the battery pack close to one side of the lower tray is bonded to the lower tray; a fixing frame is provided between two adjacent battery packs, and the two opposite sides of the fixing frame are respectively bonded to the two battery packs; the upper shell is provided with a accommodating cavity, and the plurality of battery packs are arranged in the accommodating cavity, and the upper shell is connected to the lower tray. In other words, the fixing frame plays the role of separating and fixing the battery packs, and the battery packs are bonded to the fixing frame by gluing, without the need for bolts, fixing beams, screws and other structural parts, thereby reducing the number of parts used in the battery pack; at the same time, the battery pack at the bottom of the stacking arrangement is also glued and fixed to the tray, which can also reduce the number of parts, thereby forming a simple battery pack structure without a module, and the battery pack can also save the internal space of the accommodating cavity by stacking, which is convenient for assembly. Therefore, the battery pack has a simple structure, which can improve assembly efficiency and reduce costs.

[0028] The new energy vehicle includes a battery pack, which has all the beneficial effects of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of the structure of a new energy vehicle provided by an embodiment of the utility model;

[0031] Figure 2 A schematic diagram of the structure of a battery pack provided by an embodiment of the utility model;

[0032] Figure 3 An exploded view of a battery pack provided in an embodiment of the utility model;

[0033] Figure 4 An exploded view of a battery pack and a fixing frame provided in an embodiment of the utility model;

[0034] Figure 5 A schematic diagram of the structure of the lower tray provided in an embodiment of the utility model;

[0035] Figure 6 A schematic diagram of the structure of a fixing frame provided in an embodiment of the utility model;

[0036] Figure 7 A schematic diagram of the structure of a first protective shell and a second protective shell provided in an embodiment of the utility model;

[0037] Figure 8 A schematic diagram of a portion of the structure of a battery pack provided in an embodiment of the utility model.

[0038] Icon: 1000-new energy vehicle; 100-battery pack; 10-lower tray; 11-first mounting part; 12-limiting plate; 13-support seat; 20-battery pack; 21-battery cell; 30-fixing frame; 31-second mounting part; 32-third mounting part; 33-wiring harness fixing hole; 40-upper shell; 41-accommodating chamber; 51-first bus; 52-second bus; 53-first protective shell; 531-first card slot; 54-second protective shell; 541-second card slot; 60-battery management system; 70-wiring harness; 71-buckle; 81-battery pack explosion-proof valve; 82-buffer pad; 83-sealing pad; 200-body. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0042] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0043] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0044] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] As described in the background technology, in the prior art, for the assembly of battery packs, the battery cells are usually assembled into battery modules, and then the battery modules are assembled into battery packs. However, this battery pack assembled by battery modules requires the use of a large number of structural parts such as beams, longitudinal beams, end plates, and long screws for fixing, resulting in a large number of parts in the battery pack, a complex overall structure, cumbersome assembly and high cost.

[0046] Based on this, please refer to Figure 1-Figure 8The embodiments of the present utility model provide a battery pack 100 and a new energy vehicle 1000, which can effectively improve the above-mentioned technical problems, that is, the structure is simple, which can improve assembly efficiency and reduce costs.

[0047] It should be noted that the first direction mentioned in the following content is Figure 2-Figure 8 The Z direction is shown in Figure 2-Figure 8 The Y direction is shown in the figure, and the third direction is Figure 2-Figure 8 The battery pack 100 and the new energy vehicle 1000 will be described in detail below.

[0048] Please refer to Figure 1 , Figure 1 The schematic diagram of the structure of the new energy vehicle 1000 provided in this embodiment is combined with Figure 1 The new energy vehicle 1000 includes a battery pack 100 and a vehicle body 200 . The battery pack 100 is installed on the vehicle body 200 , thereby providing electric energy to the vehicle body 200 to realize various functions of the vehicle body 200 .

[0049] Specifically, please refer to Figure 2 and Figure 3 , Figure 2 A schematic diagram of the structure of the battery pack 100 provided in this embodiment, Figure 3 The exploded view of the battery pack 100 provided in this embodiment is combined with Figure 2 and Figure 3 The battery pack 100 includes a lower tray 10, an upper shell 40, a plurality of battery packs 20 and a plurality of fixing frames 30. The plurality of battery packs 20 are stacked on the lower tray 10, and the battery pack 20 close to the side of the lower tray 10 is bonded to the lower tray 10; a fixing frame 30 is provided between each adjacent battery pack 20, and the two opposite sides of the fixing frame 30 are respectively bonded to the two battery packs 20; the upper shell 40 is provided with a accommodating cavity 41, and the plurality of battery packs 20 are arranged in the accommodating cavity 41, and the upper shell 40 is connected to the lower tray 10.

[0050] That is to say, the fixing frame 30 serves to separate and fix the battery packs 20, and the battery packs 20 are bonded to the fixing frame 30 by gluing, without the need for bolts, fixing beams, screws and other structural parts, thereby reducing the number of parts used in the battery pack 100; at the same time, the battery pack 20 at the bottom of the stacked arrangement is also glued and fixed to the tray, which can also reduce the number of parts, thereby forming a simple battery pack 100 structure without a module, and the battery pack 20 can also save the internal space of the accommodating cavity 41 by stacking, which is convenient for assembly. Therefore, the battery pack 100 has a simple structure, which can improve assembly efficiency and reduce costs.

[0051] For further information, please refer to Figure 4-Figure 6 , Figure 4 The exploded view of the battery pack 20 and the fixing frame 30 provided in this embodiment is as follows: Figure 5 This is a schematic diagram of the structure of the lower tray 10 provided in this embodiment. Figure 6 The structural diagram of the fixing frame 30 provided in this embodiment is shown in FIG. Figure 3-Figure 6 , multiple battery packs 20 are stacked along the first direction, and each battery pack 20 includes multiple battery cells 21 arranged along the second direction; the lower tray 10 is provided with multiple first mounting portions 11, and the multiple first mounting portions 11 are arranged along the second direction and are respectively bonded to the multiple battery cells 21 close to the side of the lower tray 10; the fixing frame 30 is provided with multiple second mounting portions 31 and multiple third mounting portions 32 on two opposite sides along the first direction, and the multiple second mounting portions 31 are arranged along the second direction and are respectively bonded to the multiple battery cells 21 of one of the battery packs 20; the multiple third mounting portions 32 are arranged along the second direction and are respectively bonded to the multiple battery cells 21 of another adjacent battery pack 20; wherein the first direction forms an angle with the second direction.

[0052] By providing a plurality of first mounting portions 11, the plurality of battery cells 21 of the battery pack 20 at the bottom can be installed one by one, thereby improving the installation stability of the battery pack 20 and the tray, and facilitating the bonding and fixing of the battery cells 21. Similarly, by providing a second mounting portion 31 and a third mounting portion 32 on both sides of a fixing frame 30, two adjacent battery packs 20 can also be adapted and installed, thereby also improving the installation stability and installation efficiency.

[0053] It should be noted that, in the present embodiment, the battery cell 21 is specifically a cylindrical battery cell, and correspondingly, the first mounting portion 11, the second mounting portion 31 and the third mounting portion 32 are all arc-shaped mounting portions, that is, they have an arc-shaped groove that matches and fits the side surface of the cylindrical battery cell, thereby further facilitating the bonding and fixation of the battery cell 21.

[0054] Of course, in other embodiments, if the battery cell 21 is a square battery cell, correspondingly, the first mounting portion 11, the second mounting portion 31 and the third mounting portion 32 may also be square mounting portions, that is, they have square grooves that match and fit the side surfaces of the square battery cell.

[0055] Please combine Figure 6 In this embodiment, the plurality of second mounting portions 31 and the plurality of third mounting portions 32 are arranged alternately in sequence along the second direction. Figure 6 As shown, the planes of the arc-shaped groove of the second mounting portion 31 and the arc-shaped groove of the third mounting portion 32 in the first direction do not overlap, but are arranged alternately in sequence. Through this arrangement, the installation space of the battery pack 20 can be further saved, making the overall structure of the battery pack 100 more compact, thereby further reducing the cost.

[0056] Please continue to combine Figure 3 In order to connect the battery cells 21 of the battery pack 20 in series and in parallel, in the present embodiment, the battery pack 100 further includes a first bus bar 51 and a second bus bar 52 both disposed in the accommodating cavity 41. The first bus bar 51 and the second bus bar 52 are spaced apart along the third direction and are respectively located on opposite sides of the plurality of battery packs 20. The first bus bar 51 and the second bus bar 52 are connected to the plurality of battery packs 20 at the same time; wherein the first direction, the second direction and the third direction are perpendicular to each other.

[0057] It should be noted that the positive electrodes of multiple battery cells 21 can be located on the same side, and similarly, the negative electrodes of multiple battery cells 21 can also be located on the same side. In other words, the positive electrodes of some battery cells 21 in the battery pack 20 are located on the same side as the negative electrodes of another part of the battery cells 21. The specific way of connecting them in series and parallel with the bus needs to be determined according to the design requirements of the actual battery pack 100.

[0058] In order to protect the first bus 51 and the second bus 52 and ensure the stability of their connection with the battery cell 21, the battery pack 100 also includes a first protective shell 53 and a second protective shell 54 both arranged in the accommodating cavity 41. The first protective shell 53 is arranged on the side of the first bus 51 away from the multiple battery packs 20, and the second protective shell 54 is arranged on the side of the second bus 52 away from the multiple battery packs 20.

[0059] For further information, please refer to Figure 7 , Figure 7 The schematic diagram of the structure of the first protective shell 53 and the second protective shell 54 provided in this embodiment, combined with Figure 5 and Figure 7 The lower tray 10 is also provided with a plurality of limit plates 12, which are arranged at intervals along the second direction; the first protective shell 53 is provided with a plurality of first card slots 531 at one end close to the lower tray 10, which are arranged at intervals along the second direction and are respectively engaged with one end of the plurality of limit plates 12; the second protective shell 54 is provided with a plurality of second card slots 541 at one end close to the lower tray 10, which are arranged at intervals along the second direction and are respectively engaged with the other end of the plurality of limit plates 12. By providing the limit plates 12 and engaging with the card slots, the first protective shell 53 and the second protective shell 54 can be further fixed to prevent them from shaking during the operation of the new energy vehicle 1000.

[0060] Please continue to combine Figure 3In order to intelligently manage and maintain each battery pack 20, monitor the status of the battery, prevent the battery from overcharging and over-discharging, and extend the service life of the battery, in this embodiment, the battery pack 100 also includes a battery management system 60, which is arranged in the accommodating cavity 41, and the battery management system 60 is located on the side of the first bus 51 away from the multiple battery packs 20. Specifically, it is arranged on the side of the first protective shell 53 away from the first bus 51, so that the operations of various components do not affect each other.

[0061] Of course, in other embodiments, the battery management system 60 may also be disposed on a side of the second bus 52 away from the plurality of battery packs 20 .

[0062] Please combine Figure 3 and Figure 5 Furthermore, in order to better fix the battery management system 60 , a plurality of support seats 13 are provided on the lower tray 10 , and the plurality of support seats 13 are arranged at intervals, and the battery management system 60 is arranged on the plurality of support seats 13 at the same time.

[0063] Please refer to Figure 8 , Figure 8 A partial structural diagram of the battery pack 100 provided in this embodiment, combined with Figure 3 and Figure 8 In order to realize signal collection of each battery cell 21, the battery pack 100 also includes a wiring harness 70. The wiring harness 70 is arranged in the accommodating cavity 41 and is connected to the first bus 51 and the second bus 52 at the same time; it is easy to understand that the wiring harness 70 can also be connected to the battery management system 60, so as to realize the transmission after signal collection, and facilitate the battery management system 60 to monitor and control the battery cell 21.

[0064] Further, in order to facilitate the fixing of the wiring harness 70, please combine Figure 6 and Figure 8 At least one of the two ends of the fixing frame 30 is provided with a wire harness fixing hole 33 , and the buckle 71 of the wire harness 70 is arranged in the wire harness fixing hole 33 .

[0065] Please combine Figure 2 and Figure 3 The battery pack 100 also includes a battery pack explosion-proof valve 81, which is disposed on the upper shell 40 to achieve exhaust control of the entire battery pack 100.

[0066] In order to further improve the structural compactness of the battery pack 100, the battery pack 100 further includes a buffer pad 82, which is disposed in the accommodating cavity 41 and is located between the upper shell 40 and the battery pack 20 near the side of the upper shell 40. By providing the buffer pad 82, the gap between the upper shell 40 and the battery pack 20 can be filled and compensated, thereby preventing the battery pack 20 from shaking, and improving the overall structural strength of the battery pack 100.

[0067] Please continue to combine Figure 2 In order to improve the sealing performance of the battery pack 100, the battery pack 100 also includes a sealing gasket 83, which is disposed between the upper shell 40 and the lower tray 10. In some embodiments, the upper shell 40 and the lower tray 10 can be fixed by bolts, so that the two sides of the sealing gasket 83 are respectively fixed to the upper shell 40 and the lower tray 10.

[0068] In summary, an embodiment of the utility model provides a battery pack 100 and a new energy vehicle 1000, the battery pack 100 includes a lower tray 10, an upper shell 40, a plurality of battery groups 20 and a plurality of fixing frames 30, the plurality of battery groups 20 are stacked on the lower tray 10, and the battery group 20 close to the side of the lower tray 10 is bonded to the lower tray 10; a fixing frame 30 is provided between two adjacent battery groups 20, and the opposite sides of the fixing frame 30 are respectively bonded to the two battery groups 20; the upper shell 40 is provided with a accommodating cavity 41, the plurality of battery groups 20 are arranged in the accommodating cavity 41, and the upper shell 40 is connected to the lower tray 10. That is to say, the fixing frame 30 serves to separate and fix the battery packs 20, and the battery pack 20 is bonded to the fixing frame 30 by gluing, without the need for other structural parts such as bolts, fixing beams and screws, thereby reducing the number of components used in the battery pack 100; at the same time, the battery pack 20 located at the bottom of the stacked arrangement is also glued and fixed to the tray, which can also reduce the number of components, thereby forming a simple battery pack 100 structure without a module, and the battery pack 20 can also save the internal space of the accommodating cavity 41 by being stacked, thereby facilitating assembly.

[0069] Therefore, the battery pack 100 has a simple structure, which can improve assembly efficiency and reduce costs.

[0070] The new energy vehicle 1000 includes a battery pack 100 , which has all the functions and beneficial effects of the battery pack 100 .

[0071] The above description is only a specific embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A battery pack, characterized in that: include: Lower tray (10); A plurality of battery packs (20), wherein the plurality of battery packs (20) are stacked on the lower tray (10), and the battery packs (20) on one side close to the lower tray (10) are bonded to the lower tray (10); A plurality of fixing frames (30), each of which is provided between two adjacent battery packs (20), and opposite sides of the fixing frames (30) are respectively bonded to the two battery packs (20); and An upper shell (40), wherein the upper shell (40) is provided with a receiving cavity (41), the plurality of battery packs (20) are all arranged in the receiving cavity (41), and the upper shell (40) is connected to the lower tray (10).

2. The battery pack according to claim 1, characterized in that: The plurality of battery packs (20) are stacked along a first direction, and each of the battery packs (20) comprises a plurality of battery cells (21) arranged along a second direction; the lower tray (10) is provided with a plurality of first mounting portions (11), the plurality of first mounting portions (11) are arranged along the second direction, and are respectively bonded to the plurality of battery cells (21) on one side close to the lower tray (10); The fixing frame (30) is provided with a plurality of second mounting portions (31) and a plurality of third mounting portions (32) on two opposite sides along the first direction, the plurality of second mounting portions (31) being arranged in an array along the second direction and respectively bonded to the plurality of battery cells (21) of one of the battery packs (20); the plurality of third mounting portions (32) being arranged in an array along the second direction and respectively bonded to the plurality of battery cells (21) of another adjacent battery pack (20); The first direction and the second direction form an angle.

3. The battery pack according to claim 2, characterized in that: The battery pack (100) further comprises a first bus bar (51) and a second bus bar (52) both disposed in the accommodating cavity (41); the first bus bar (51) and the second bus bar (52) are disposed at intervals along a third direction and are respectively located on two opposite sides of the plurality of battery packs (20); the first bus bar (51) and the second bus bar (52) are simultaneously connected to the plurality of battery packs (20); The first direction, the second direction and the third direction are perpendicular to each other.

4. The battery pack according to claim 3, characterized in that: The battery pack (100) further comprises a first protective shell (53) and a second protective shell (54) both disposed in the accommodating cavity (41), wherein the first protective shell (53) is disposed on a side of the first busbar (51) away from the plurality of battery packs (20), and the second protective shell (54) is disposed on a side of the second busbar (52) away from the plurality of battery packs (20).

5. The battery pack according to claim 4, characterized in that: The lower tray (10) is further provided with a plurality of limit plates (12), and the plurality of limit plates (12) are arranged at intervals along the second direction; the first protective shell (53) is provided with a plurality of first card slots (531) at one end close to the lower tray (10), and the plurality of first card slots (531) are arranged at intervals along the second direction, and are respectively snap-fitted with one end of the plurality of limit plates (12); the second protective shell (54) is provided with a plurality of second card slots (541) at one end close to the lower tray (10), and the plurality of second card slots (541) are arranged at intervals along the second direction, and are respectively snap-fitted with the other end of the plurality of limit plates (12).

6. The battery pack according to claim 3, characterized in that: The battery pack (100) further comprises a battery management system (60), wherein the battery management system (60) is arranged in the accommodating cavity (41), and the battery management system (60) is located on a side of the first bus (51) away from the plurality of battery packs (20), or the battery management system (60) is located on a side of the second bus (52) away from the plurality of battery packs (20).

7. The battery pack according to claim 6, characterized in that: A plurality of support seats (13) are provided on the lower tray (10), the plurality of support seats (13) are arranged at intervals, and the battery management system (60) is simultaneously arranged on the plurality of support seats (13).

8. The battery pack according to claim 3, characterized in that: The battery pack (100) further comprises a wiring harness (70), wherein the wiring harness (70) is arranged in the accommodating cavity (41) and is simultaneously connected to the first bus bar (51) and the second bus bar (52); At least one of the fixing frames (30) has a wire harness fixing hole (33) at both ends, and the buckle (71) of the wire harness (70) is arranged in the wire harness fixing hole (33).

9. The battery pack according to claim 2, characterized in that: The plurality of second mounting portions (31) and the plurality of third mounting portions (32) are arranged in a staggered manner in sequence along the second direction.

10. A new energy vehicle, characterized in that: A battery pack (100) comprising any one of claims 1 to 9.

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