Battery pack lower box, battery pack and vehicle

Abstract

The utility model belongs to the technical field of power batteries, and specifically relates to a battery pack lower box, a battery pack and a vehicle, wherein the battery pack lower box comprises a frame, a cooling plate, a bottom guard plate and a connecting assembly, wherein the cooling plate and the bottom guard plate are respectively connected to the frame, and the bottom guard plate is located on the side of the cooling plate away from the frame, and the connecting assembly is passed through the cooling plate, the bottom guard plate and the frame to connect the cooling plate, the bottom guard plate and the frame. The battery pack lower box of the utility model can improve the structural stability of the battery pack box and the support stability of the battery cell.

Description

Technical Field

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

[0002] As the requirements for driving range become higher and higher, the capacity of the battery pack also increases, resulting in an increase in the number or weight of the battery cell modules in the battery pack case. In order to provide sufficient strength to support the battery modules, the battery pack lower case in the related art is equipped with a liquid cooling plate and a bottom guard plate at its bottom, and the liquid cooling plate and the bottom guard plate are used to support the battery cells. However, the liquid cooling plate and the bottom guard plate in the related art are independently connected to the case, and their structural strength and support stability still need to be improved. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the embodiment of the utility model provides a battery pack lower box, which can improve the structural stability of the battery pack box and the support stability of the battery cell.

[0004] The embodiment of the utility model also provides a battery pack.

[0005] The embodiment of the utility model also provides a vehicle.

[0006] The lower box of the battery pack of the embodiment of the utility model includes: a frame; a cooling plate and a bottom guard plate, wherein the cooling plate and the bottom guard plate are respectively connected to the frame, and the bottom guard plate is located on the side of the cooling plate away from the frame; a connecting component, wherein the connecting component is passed through the cooling plate, the bottom guard plate and the frame to connect the cooling plate, the bottom guard plate and the frame.

[0007] The battery pack lower box of the embodiment of the utility model connects the cooling plate, the bottom guard plate and the frame together through a connecting assembly, which improves the connection strength between the frame and the bottom guard plate and the cooling plate, thereby improving the structural strength of the battery pack lower box and further improving the supporting stability of the battery cell.

[0008] In some embodiments, a first connector and a second connector, the first connector passes through the cooling plate and the frame in sequence to connect the cooling plate and the frame, and one end of the second connector extends into the first connector to connect the bottom guard plate, the cooling plate and the frame.

[0009] In some embodiments, there are multiple first connecting members, and the multiple first connecting members are arranged at intervals on the frame; there are multiple second connecting members, and the multiple second connecting members are arranged at intervals on the frame, and the second connecting members at least partially extend into the first connecting members.

[0010] In some embodiments, a groove is provided on the bottom guard plate, the groove extends in a direction close to the cooling plate, and the second connecting member is placed in the groove.

[0011] In some embodiments, the frame includes a frame, a first side beam, a second side beam, a first cross beam, a second cross beam and a third cross beam, the frame, the first side beam and the second side beam form a accommodating cavity, the frame has a first end and a second end in its length direction, the first side beam and the second side beam are respectively connected to the frame, the first side beam is arranged adjacent to the first end, the second side beam is arranged adjacent to the second end, a plurality of cross beams are located in the accommodating cavity, the first cross beam is arranged adjacent to the first side beam, the third cross beam is arranged adjacent to the second side beam, and the second cross beam is located between the first cross beam and the second cross beam.

[0012] In some embodiments, the frame further includes a first reinforcing beam and a second reinforcing beam, wherein the first reinforcing beam and the second reinforcing beam are located in the accommodating cavity, and the first reinforcing beam is located between the first cross beam and the first side beam, and the second reinforcing beam is located between the second side beam and the third cross beam.

[0013] In some embodiments, the first reinforcing beam extends along the length direction of the frame, there are multiple first reinforcing beams, and the multiple first reinforcing beams are arranged at intervals in the width direction of the frame; the second reinforcing beam extends along the length direction of the frame, there are multiple second reinforcing beams, and the multiple second reinforcing beams are arranged at intervals in the width direction of the frame.

[0014] The battery pack of the embodiment of the present invention is characterized by comprising:

[0015] A battery pack lower box, wherein the battery pack lower box is the battery pack lower box described in any one of the above embodiments;

[0016] A battery cell module, wherein the battery cell module is arranged in the lower box of the battery pack;

[0017] An upper cover is connected to the lower box of the battery pack to seal the battery cell module in the lower box of the battery pack.

[0018] The vehicle according to the embodiment of the present invention comprises the battery pack described in the above embodiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a battery cell module according to an embodiment of the present utility model.

[0020] Figure 2 It is a top view of the lower box frame of the embodiment of the utility model.

[0021] Figure 3It is a schematic diagram of a frame of an embodiment of the utility model.

[0022] Figure 4 It is an exploded schematic diagram of the lower box frame of the embodiment of the utility model.

[0023] Figure 5 It is a top view of the first side beam of an embodiment of the utility model.

[0024] Figure 6 It is a top view of the cooling plate of the embodiment of the utility model.

[0025] Figure 7 It is a top view of the bottom guard plate of an embodiment of the utility model.

[0026] Figure 8 It is a schematic diagram of the first connecting member of an embodiment of the utility model.

[0027] Fig. 9 It is a schematic diagram of the first connecting member of an embodiment of the utility model.

[0028] Fig.10 It is a schematic diagram of the second connecting member of an embodiment of the utility model.

[0029] Reference numerals:

[0030] Battery pack lower box 100, battery cell module 200,

[0031] Frame 1, accommodating cavity 11,

[0032] The first side beam 2, the second side beam 3, the first reinforcing beam 4, the second reinforcing beam 5,

[0033] Beam 6, first beam 61, second beam 62, third beam 63, mounting portion 7,

[0034] First connecting member 8 , second connecting member 9 , cooling plate 10 , bottom guard plate 20 , groove 201 . DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0036] The battery pack lower box 100 of the utility model embodiment includes a frame, a cooling plate 10, a bottom guard plate 20 and a connecting assembly. The cooling plate 10 and the bottom guard plate 20 are respectively connected to the frame, and the bottom guard plate 20 is located on the side of the cooling plate 10 away from the frame. The connecting assembly is penetrated through the cooling plate 10, the bottom guard plate 20 and the frame to connect the cooling plate 10, the bottom guard plate 20 and the frame.

[0037] Optionally, the connecting assembly includes a first connecting member 8 and a second connecting member 9, the first connecting member 8 passes through the cooling plate 10 and the frame in sequence to connect the cooling plate 10 and the frame, the second connecting member 9 is arranged between the bottom guard plate 20, the cooling plate 10 and the frame, and one end of the second connecting member 9 extends into the first connecting member 8 to connect the bottom guard plate 20, the cooling plate 10 and the frame.

[0038] Specifically, Figures 1 to 10 As shown, the cooling plate 10 is connected to the lower end of the frame, the cooling plate 10 is suitable for cooling the battery module 200, the bottom protective plate 20 is connected to the lower end of the frame, and the first connecting member 8 passes through the cooling plate 10 and the frame from bottom to top in sequence to connect the cooling plate 10 to the frame. In other words, the first connecting member 8 passes through the cooling plate 10 and the frame from bottom to top in sequence to fix the cooling plate 10 to the lower end of the frame. It should be noted that the first connecting member 8 can be a rivet nut, or the first connecting member 8 can be other existing connecting members, for example, the first connecting member 8 is a coupling nut.

[0039] The upper end of the second connecting member 9 extends into the first connecting member 8 to connect the bottom guard plate 20, the cooling plate 10 and the frame. In other words, the upper end of the second connecting member 9 extends into the first connecting member 8 and is connected to the first connecting member 8 to fix the bottom guard plate 20 to the lower end of the cooling plate 10 and the frame. It should be noted that the second connecting member 9 can be a bolt, or the second connecting member 9 can be other existing connecting devices, for example, the second connecting member 9 is an expansion bolt.

[0040] Furthermore, a preset gap may be provided between the cooling plate 10 and the bottom guard plate 20 in the up and down directions, thereby preventing the bottom guard plate 20 from being directly impacted by the cooling plate 10 after being knocked and punctured, thereby improving the stability and safety of the use of the lower box 100 of the battery pack.

[0041] The battery pack lower box 100 of the embodiment of the utility model fixes the cooling plate 10 on the battery pack frame through the first connecting member 8, and the upper end of the second connecting member 9 extends into the first connecting member 8 to fix the bottom guard plate 20 to the lower end of the cooling plate 10 and the frame. The first connecting member 8 and the second connecting member 9 are installed at the same installation point, which improves the connection strength between the frame and the bottom guard plate 20 and the cooling plate 10, thereby improving the structural strength of the battery pack lower box, and further improving the support stability of the battery cell.

[0042] In some embodiments, there are multiple first connecting members 8, which are arranged at intervals on the frame; there are multiple second connecting members 9, which are arranged at intervals on the frame, and at least part of the second connecting members 9 extends into the first connecting members 8.

[0043] Specifically, Figures 7 to 10As shown, a plurality of first connecting members 8 are arranged at intervals along the left-right direction on the frame, and a plurality of first connecting members 8 can also be arranged at intervals in the front-back direction, so as to improve the structural strength of the connection between the cooling plate 10 and the first connecting members 8.

[0044] A plurality of second connecting members 9 are arranged at intervals along the left-right direction on the frame, and a plurality of second connecting members 9 can also be arranged at intervals in the front-back direction. The second connecting members 9 are connected to the first connecting members 8 one by one to fix the bottom guard plate 20 on the frame. For example, a threaded hole is provided on the frame, and an external thread is provided on the second connecting member 9, and then the second connecting member 9 fixes the bottom guard plate 20 on the frame through the threaded hole on the frame.

[0045] The battery pack lower box 100 of the embodiment of the utility model is provided with multiple second connecting members 9 and first connecting members 8. The multiple first connecting members 8 can be arranged at intervals along the left-right direction on the frame, and the multiple second connecting members 9 can be arranged at intervals along the left-right direction on the frame. The multiple first connecting members 8 and the multiple second connecting members 9 are connected one by one, thereby improving the structural strength of the connection between the bottom guard plate 20 and the cooling plate 10 and the frame, and improving the stability and safety of the battery pack lower box 100.

[0046] In some embodiments, a groove 201 is provided on the bottom guard plate 20 , the groove 201 extends in a direction close to the cooling plate 10 , and the second connecting member 9 is placed in the groove 201 .

[0047] Specifically, the second connecting member 9 is placed in the groove 201 to prevent the lower end of the second connecting member 9 from protruding from the bottom guard plate 20 and to prevent the second connecting member 9 from shaking, thereby improving the installation accuracy and installation stability of the second connecting member 9.

[0048] In some embodiments, the frame includes a frame 1, a first side beam 2, a second side beam 3 and a plurality of cross beams 6, the frame 1 has a first end and a second end in its length direction, the first side beam 2 and the second side beam 3 are respectively connected to the frame 1, the first side beam 2 is arranged adjacent to the first end, the second side beam 3 is arranged adjacent to the second end, the first side beam 2, the frame 1 and the second side beam 3 form a accommodating cavity 11, the plurality of cross beams 6 are located in the accommodating cavity 11, and the plurality of cross beams 6 are arranged at intervals along the length direction of the frame 1.

[0049] Specifically, Figures 1 to 5 As shown, the crossbeam 6 extends in the left-right direction, and the left and right ends of the crossbeam 6 are respectively connected to the left and right ends of the frame 1, thereby supporting the frame 1 in the left-right direction, increasing the structural strength of the frame 1 in the left-right direction, and cooperating with the first side beam 2, the second side beam 3, the first reinforcing beam 4 and the second reinforcing beam 5, the structural strength of the lower box frame is improved, thereby improving the stability and safety of the lower box frame.

[0050] Furthermore, there may be multiple cross beams 6 , and the multiple cross beams 6 are arranged at intervals along the front-to-back direction in the accommodating cavity 11 .

[0051] Optionally, there are three cross beams 6 , which are divided into a first cross beam 61 , a second cross beam 62 and a third cross beam 63 . The first cross beam 61 is arranged adjacent to the first side beam 2 , the third cross beam 63 is arranged adjacent to the second side beam 3 , and the second cross beam 62 is located between the first cross beam 61 and the third cross beam 63 .

[0052] The left and right ends of the first cross beam 61 are respectively connected to the left and right ends of the frame 1, the rear end of the first reinforcing beam 4 is connected to the front end of the first cross beam 61, the front end of the first reinforcing beam 4 is connected to the first side beam 2, the rear end of the second reinforcing beam 5 is connected to the second side beam 3, and the front end of the second reinforcing beam 5 is connected to the rear end of the third cross beam 63.

[0053] The second crossbeam 62 is disposed between the first crossbeam 61 and the third crossbeam 63. For example, the second crossbeam 62 is disposed on the midline of the first crossbeam 61 and the third crossbeam 63 in the front-to-back direction. Further, a plurality of crossbeams 6 are arranged in parallel in the front-to-back direction, thereby facilitating force support of the frame 1 in the left-right direction. The battery cell module 200 is connected to the second crossbeam 62 by structural adhesive, thereby facilitating installation and fixation of the battery cell module 200.

[0054] The lower box frame of the embodiment of the utility model is provided with a crossbeam 6, and the crossbeam 6 is connected to the frame 1 to improve the structural strength of the lower box frame. The number of the crossbeams 6 can be multiple, and the multiple crossbeams 6 are arranged in parallel at intervals in the front-to-back direction to increase the installation space of the accommodating cavity 11, which is convenient for installing a larger volume of the battery cell module 200.

[0055] The length direction of the frame 1 is the front-to-back direction (such as Figure 1 In the front-to-back direction shown in FIG, the first side beam 2 is arranged at the front end, the second side beam 3 is arranged at the rear end, the first side beam 2 is connected to the first end of the frame 1, and the second side beam 3 is connected to the second end of the frame 1.

[0056] In some embodiments, the frame also includes a first reinforcing beam 4 and a second reinforcing beam 5, the first reinforcing beam 4 and the second reinforcing beam 5 are located in the accommodating cavity 11, and the first reinforcing beam 4 is located between the first side beam 2 and the first cross beam 61, and the second reinforcing beam 5 is located between the second side beam 3 and the third cross beam 63.

[0057] The first reinforcing beam 4 extends in the front-to-back direction, and the second reinforcing beam 5 extends in the front-to-back direction.

[0058] The front end of the first reinforcing beam 4 is connected to the rear end of the first side beam 2, and the first reinforcing beam 4 is connected to the frame 1.

[0059] The rear end of the second reinforcing beam 5 is connected to the front end of the second side beam 3, and the second reinforcing beam 5 is connected to the frame 1.

[0060] The lower box frame of the embodiment of the utility model is provided with a first reinforcing beam 4 and a second reinforcing beam 5. The first reinforcing beam 4 and the second reinforcing beam 5 extend in the forward direction, and thus there is no need to provide a longitudinal beam in the related art, thereby reducing the weight. A force-bearing structure is formed by the frame 1, the first reinforcing beam 4, the second reinforcing beam 5, the first side beam 2 and the second side beam 3 to improve the structural strength of the lower box frame. The first reinforcing beam 4 is arranged between the first side beam 2 and the frame 1, and the second reinforcing beam 5 is arranged between the second reinforcing beam 5 and the frame 1. This can increase the available space for the battery cell module 200 and facilitate the arrangement of a larger battery cell module 200.

[0061] In some embodiments, the first side beam 2 and the second side beam 3 extend along the width direction of the frame 1 , and the first side beam 2 and the second side beam 3 are arranged in parallel.

[0062] Specifically, Figures 1 to 5 As shown, the first side beam 2 and the second side beam 3 extend in the left-right direction, and the first side beam 2 and the second side beam 3 are arranged in parallel in the front-to-back direction, so as to provide force support for the frame 1 when the frame 1 is subjected to force while avoiding occupying too much space in the accommodating cavity 11, and avoiding damage to the battery cell module 200 due to uneven force inside the frame 1. The first reinforcing beam 4 and the second reinforcing beam 5 provide support for the frame 1 in the front-to-back direction. The first reinforcing beam 4 is respectively connected to the frame 1 and the first side beam 2, and the second reinforcing beam 5 is respectively connected to the frame 1 and the second side beam 3. The first reinforcing beam 4 and the second reinforcing beam 5 are arranged in parallel in the left-to-right direction, so as to facilitate the transmission of force when the frame 1, the first side beam 2 and the second side beam 3 are subjected to force, thereby improving the structural strength of the lower box frame.

[0063] The lower box frame of the utility model embodiment arranges the first side beam 2 and the second side beam 3 in parallel in the front-to-back direction, thereby avoiding occupying the installation space of the battery module 200. The parallel arrangement facilitates the design and installation of the battery module 200, thereby reducing the use cost of the lower box frame.

[0064] In some embodiments, the first reinforcing beam 4 extends along the length direction of the frame 1 , and there are multiple first reinforcing beams 4 , which are arranged at intervals in the width direction of the frame 1 .

[0065] And / or, the second reinforcement beam 5 extends along the length direction of the frame 1 , there are multiple second reinforcement beams 5 , and the multiple second reinforcement beams 5 are arranged at intervals in the width direction of the frame 1 .

[0066] Specifically, Figures 1 to 7As shown, the first reinforcing beam 4 extends in the front-rear direction, and there are a plurality of first reinforcing beams 4 , which are arranged at intervals in the left-right direction.

[0067] The number of the second reinforcing beams 5 is plural, the second reinforcing beams 5 extend in the front-rear direction, and the plural second reinforcing beams 5 are arranged at intervals in the left-right direction.

[0068] For example, there are multiple first reinforcing beams 4, and the multiple first reinforcing beams 4 are arranged at intervals in the left and right directions. At this time, the number of the second reinforcing beam 5 can be one, thereby increasing the structural strength of the lower box frame and improving the stability and safety of the lower box frame.

[0069] Alternatively, there may be multiple first reinforcing beams 4, which are arranged at intervals in the left-right direction. In this case, there may be multiple second reinforcing beams 5, which are arranged at intervals in the left-right direction, thereby increasing the structural strength of the lower box frame and improving the stability and safety of the use of the lower box frame.

[0070] Alternatively, the number of the first reinforcing beam 4 can be one, and the number of the second reinforcing beams 5 can be multiple, and the multiple second reinforcing beams 5 are arranged at intervals in the left and right directions, thereby increasing the structural strength of the lower box body and improving the stability and safety of the lower box body frame.

[0071] In some embodiments, in the length direction of the frame 1 , the first reinforcement beam 4 and the second reinforcement beam 5 are located on the same straight line.

[0072] Specifically, Figures 1 to 5 As shown, the first reinforcing beam 4 and the second reinforcing beam 5 are located in the same straight line in the front-rear direction.

[0073] For example, the number of the first reinforcing beams 4 and the second reinforcing beams 5 is plural, the plural first reinforcing beams 4 extend in the left-right direction, and the plural first reinforcing beams 4 and the plural second reinforcing beams 5 are in the same straight line in the front-back direction.

[0074] For example, when the number of the first reinforcing beam 4 and the second reinforcing beam 5 is one, the first reinforcing beam 4 and the second reinforcing beam 5 are located in the same straight line in the front-rear direction.

[0075] Alternatively, there are multiple first reinforcing beams 4, and there is one second reinforcing beam 5, and the second reinforcing beam 5 is in the same straight line as any one of the multiple first reinforcing beams 4.

[0076] Alternatively, there are multiple second reinforcing beams 5, there are multiple first reinforcing beams 4, and the first reinforcing beam 4 and any one of the multiple second reinforcing beams 5 are in the same straight line.

[0077] The lower box frame of the utility model embodiment arranges the first reinforcing beam 4 and the second reinforcing beam 5 in parallel in the front-to-back direction, thereby better supporting and transmitting the force of the frame 1 in the front-to-back direction, thereby improving the structural strength of the lower box frame, and can also offset the forward force and backward force simultaneously occurring in the front-to-back direction of the frame 1 or the first side beam 2 and the second side beam 3, thereby improving the stability of the lower box frame.

[0078] In some embodiments, the lower box frame further includes a cross beam 6 , which is located in the accommodating cavity 11 , and between the first side beam 2 and the second side beam 3 .

[0079] In some embodiments, a mounting portion 7 is provided on the frame 1 and the crossbeam 6 , and the mounting portion 7 is suitable for being connected to the vehicle body.

[0080] Specifically, Figures 1 to 5 As shown, the mounting portion 7 is connected to the vehicle body to fix the frame 1 to the vehicle body, thereby fixing the lower box frame on the vehicle.

[0081] Furthermore, there are multiple mounting parts 7, and the multiple mounting parts 7 are arranged at intervals in the left-right direction. For example, the multiple mounting parts 7 are arranged at intervals in the left-right direction at the first end of the frame 1, or the multiple mounting parts 7 are arranged at intervals in the left-right direction at the second end of the frame 1, thereby improving the connection strength between the frame 1 and the vehicle body, and improving the stability of the connection between the lower box frame and the vehicle body.

[0082] The lower box frame of the embodiment of the utility model is provided with a mounting portion 7, so that the lower box frame can transmit the force to the vehicle body, avoid stress concentration on the lower box frame causing wear, and improve the stability and safety of the lower box frame.

[0083] The battery pack of the utility model embodiment includes a battery cell module 200, a battery pack lower box 100 and an upper cover. The battery pack lower box 100 is the above-mentioned battery pack lower box 100. The battery cell module 200 is arranged in the battery pack lower box 100. The upper cover is connected to the battery pack lower box 100 to seal the battery cell module 200 in the battery pack lower box 100.

[0084] Specifically, Figures 7 to 10 As shown, the battery cell module 200 is arranged in the accommodating cavity 11 , and the battery cell module 200 is connected to the second crossbeam 62 to fix the battery cell module 200 .

[0085] The battery pack of the embodiment of the utility model adopts the above-mentioned battery pack lower box 100, and there is no need to separately set up the longitudinal material in the related art, thereby reducing the weight of the battery pack and increasing the available space of the battery cell module 200.

[0086] The vehicle of the embodiment of the utility model includes the battery pack as described above.

[0087] The vehicle of the embodiment of the utility model adopts the above-mentioned battery pack, which does not need to separately set the longitudinal material in the related art, reduces the weight of the battery pack, can increase the available space of the battery module 200, and further improves the vehicle's cruising range.

[0088] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0089] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0090] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0091] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0092] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0093] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A battery pack lower box, characterized in that: include: frame; A cooling plate and a bottom guard plate, wherein the cooling plate and the bottom guard plate are respectively connected to the frame, and the bottom guard plate is located at a side of the cooling plate away from the frame; A connecting component is provided through the cooling plate, the bottom guard plate and the frame to connect the cooling plate, the bottom guard plate and the frame.

2. The battery pack lower box according to claim 1, characterized in that: The connecting assembly includes a first connecting member and a second connecting member, the first connecting member passes through the cooling plate and the frame in sequence to connect the cooling plate and the frame, and one end of the second connecting member extends into the first connecting member to connect the bottom guard plate with the cooling plate and the frame.

3. The battery pack lower box according to claim 2, characterized in that: There are multiple first connecting members, which are arranged at intervals on the frame. There are multiple second connecting members, which are arranged at intervals on the frame. At least part of the second connecting members extends into the first connecting member.

4. The battery pack lower box according to claim 3, characterized in that: The bottom guard plate is provided with a groove, the groove extends in a direction close to the cooling plate, and the second connecting member is placed in the groove.

5. The battery pack lower box according to claim 1, characterized in that: The frame includes a frame, a first side beam, a second side beam, a first cross beam, a second cross beam and a third cross beam. The frame, the first side beam and the second side beam form a accommodating cavity. The frame has a first end and a second end in its length direction. The first side beam and the second side beam are respectively connected to the frame. The first side beam is arranged adjacent to the first end, the second side beam is arranged adjacent to the second end, the first cross beam is arranged adjacent to the first side beam, the third cross beam is arranged adjacent to the second side beam, and the second cross beam is located between the first cross beam and the second cross beam.

6. The battery pack lower box according to claim 5, characterized in that: The frame further includes a first reinforcement beam and a second reinforcement beam, wherein the first reinforcement beam and the second reinforcement beam are located in the accommodating cavity, and the first reinforcement beam is located between the first cross beam and the first side beam, and the second reinforcement beam is located between the second side beam and the third cross beam.

7. The battery pack lower box according to claim 6, characterized in that: The first reinforcing beam extends along the length direction of the frame, there are multiple first reinforcing beams, and the multiple first reinforcing beams are arranged at intervals in the width direction of the frame. The second reinforcing beam extends along the length direction of the frame, there are multiple second reinforcing beams, and the multiple second reinforcing beams are arranged at intervals in the width direction of the frame.

8. A battery pack, characterized in that: include: A battery pack lower box, wherein the battery pack lower box is the battery pack lower box according to any one of claims 1 to 7; A battery cell module, wherein the battery cell module is arranged in the lower box of the battery pack; An upper cover is connected to the lower box of the battery pack to seal the battery cell module in the lower box of the battery pack.

9. A vehicle, characterized in that: Comprising the battery pack as claimed in claim 8.

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