Battery pack and electric device

Abstract

The utility model relates to a battery pack and a power utilization device. The battery pack comprises a shell body, a bottom plate and a connecting piece, the bottom plate comprises a bottom plate frame and a bottom plate body which are connected with each other, the bottom plate frame is arranged in the circumferential area of the bottom plate body, and the bottom plate frame is connected with the shell body, so that a shell cavity is defined by the shell body and the bottom plate; the connecting piece is at least partially arranged in the shell cavity, and the connecting piece is at least connected with the bottom plate body and the shell body. The connecting piece is arranged in the shell cavity, the connecting piece is at least connected with the bottom plate body and the shell body, the connecting piece plays a role of a middle connecting piece, the bottom plate body is effectively connected to the shell body, the problem that the bottom plate body collapses is solved, and it is guaranteed that the gap between the bottom plate and the ground is within the safety gap range; and the bottom scraping problem is reduced.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of battery pack, in particular, to a battery pack and a power consumption device. BACKGROUND

[0002] In the related art, the battery pack includes a bottom plate and a shell body, the outer periphery of the bottom plate is connected with the shell body to form a battery pack shell, but the bottom plate, especially the middle region of the bottom plate, is prone to collapse, which leads to a small gap between the bottom plate and the ground and increases the risk of scratching the bottom; in addition, the rigidity of the entire battery pack cannot be improved by the bottom plate. CONTENT OF THE UTILITY MODEL

[0003] To overcome the problems in the related art, the present disclosure provides a battery pack and a power consumption device to solve the technical problems in the related art.

[0004] According to the embodiments of the present disclosure, a battery pack is provided, which includes a shell body, a bottom plate and a connecting piece.

[0005] The bottom plate includes a bottom plate frame and a bottom plate body connected with each other, the bottom plate frame is arranged at the circumferential region of the bottom plate body, and the bottom plate frame is connected with the shell body to form a shell cavity surrounded by the shell body and the bottom plate.

[0006] The connecting piece is at least partially arranged in the shell cavity, and the connecting piece connects at least the bottom plate body and the shell body.

[0007] In some embodiments, the connecting piece includes a first connecting component and a second connecting component.

[0008] The first connecting component is connected between the bottom plate frame and the shell body, the second connecting component is connected with the first connecting component, and the second connecting component is arranged in the shell cavity and connected with the bottom plate body.

[0009] In some embodiments, the second connecting component includes at least one intermediate cross beam extending in a first direction and connected with the bottom plate body; and / or, the second connecting component includes at least one intermediate longitudinal beam extending in a second direction and connected with the bottom plate body; wherein the first direction and the second direction are arranged intersectingly.

[0010] In some embodiments, the second connecting component includes at least one intermediate cross beam extending in a first direction and connected with the bottom plate body.

[0011] The second connecting component comprises at least one intermediate longitudinal beam extending along the second direction and connected with the bottom plate body; wherein the first direction and the second direction are arranged in intersection;

[0012] The intermediate longitudinal beam and the intermediate transverse beam are staggered.

[0013] In some embodiments, the first connecting component comprises a peripheral frame, and the intermediate transverse beam and the intermediate longitudinal beam are located within the peripheral frame.

[0014] At least one end of the intermediate transverse beam along the first direction is connected with the peripheral frame, and at least one end of the intermediate longitudinal beam along the second direction is connected with the peripheral frame.

[0015] In some embodiments, the intermediate transverse beam is provided with a plurality of first connecting parts arranged in interval along the first direction and used for connecting with the bottom plate body; and / or,

[0016] The intermediate longitudinal beam is provided with a plurality of second connecting parts arranged in interval along the second direction and used for connecting with the bottom plate body.

[0017] In some embodiments, the bottom plate body is recessed with mounting grooves extending along the second direction, the mounting grooves are arranged opposite to the intermediate longitudinal beam and connected with each other; wherein the length of the mounting grooves extending along the second direction is not less than the length of the intermediate longitudinal beam extending along the second direction.

[0018] In some embodiments, the battery pack further comprises a thermal management component arranged in the shell cavity and connected with the shell body, and at least part of the connecting pieces are arranged between the thermal management component and the bottom plate.

[0019] In some embodiments, at least part of the connecting pieces are connected with the thermal management component.

[0020] In some embodiments, the connecting pieces comprise first connecting components and second connecting components.

[0021] The first connecting components are connected between the bottom plate frame and the shell body, the second connecting components are arranged in the shell cavity and connected with the first connecting components, and the second connecting components connect the bottom plate and the thermal management component.

[0022] In some embodiments, the thermal management component comprises at least two heat exchange regions, and a spacing region is arranged between two adjacent heat exchange regions.

[0023] The connecting piece comprises a first part and a second part, the first part is arranged opposite to the heat exchange region, and the second part is arranged opposite to the interval region;

[0024] The first part is connected to the bottom plate body, and the second part is connected to the bottom plate body and the interval region.

[0025] In some embodiments, the battery pack further comprises a battery module and at least one partition plate, the battery module and the partition plate are arranged in the shell cavity, the battery module comprises at least two battery modules, and the adjacent two battery modules are arranged by the partition plate.

[0026] The heat exchange region is arranged opposite to the battery module, and the interval region is arranged opposite to the partition plate and is connected to each other.

[0027] In some embodiments, at least part of the connecting piece and the heat management component define a filling gap;

[0028] The battery pack further comprises an adhesive, and the adhesive is filled in the filling gap.

[0029] In some embodiments, the heat management component comprises a first plate and a second plate, the first plate comprises a connected base plate part and at least one protruding part;

[0030] The base plate part is arranged in close contact with the second plate, and the protruding part protrudes towards the bottom plate relative to the second plate and defines a heat management flow channel for accommodating heat management medium between the second plate;

[0031] The connecting piece is arranged on the side of the first plate away from the second plate and defines the filling gap with the protruding part and / or the base plate part.

[0032] In some embodiments, the protruding part comprises a flat plate and two bent plates;

[0033] One end of one of the bent plates is connected to the base plate part, and the other end is connected to one side of the flat plate, and one end of the other bent plate is connected to the base plate part, and the other end is connected to the other side of the flat plate;

[0034] In the direction away from the base plate part, the bent plate is arranged to extend towards the bottom plate, and at least one of the bent plates is used to define the filling gap.

[0035] In some embodiments, the plurality of protrusions are arranged as at least two, and two adjacent protrusions are connected by the base plate, and the connecting member is arranged between the two flat plates of the two adjacent protrusions to define the filling gap between the two adjacent protrusions.

[0036] The connecting member comprises a first connecting segment, a second connecting segment and a third connecting segment connected in sequence.

[0037] The first connecting segment is arranged on the base plate, the second connecting segment extends in the same direction as one of the bent plates of the protrusions and is arranged in a spaced manner, and the third connecting segment is arranged on the flat plate of the protrusion to define the filling gap.

[0038] In some embodiments, at least part of the third connecting segment is arranged in a spaced manner with the flat plate to form a filling gap for the adhesive to fill; and the filling gap and the filling gap are in communication with each other.

[0039] In some embodiments, the thermal management component is welded to the shell body and forms a welding area, and the adhesive is also bonded between the shell body and the connecting member to cover the welding area.

[0040] According to the embodiments of the present disclosure, a power-using device is also provided, which comprises the battery; and the power-using device comprises a vehicle.

[0041] The technical solutions provided by the embodiments of the present disclosure can have the following beneficial effects: the bottom plate frame of the bottom plate is connected to the shell body, so that the shell body and the bottom plate are connected to each other and surround the shell cavity, and by arranging the connecting member in the shell cavity and connecting at least the bottom plate body and the shell body, the connecting member functions as an intermediate connecting member, effectively connecting the bottom plate body to the shell body, reducing the problem of the bottom plate body collapsing, ensuring that the gap between the bottom plate and the ground is within a safe gap range, and reducing the problem of the bottom plate being scratched. In addition, by arranging the connecting member and connecting the bottom plate body and the shell body, the strength of the connection between the bottom plate and the shell body can be improved, and the stiffness of the entire battery pack can be improved.

[0042] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0043] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present disclosure and, together with the specification, serve to explain the principles of the present disclosure.

[0044] Figure 1 is an explosion structure schematic diagram of a battery pack according to an embodiment of the present disclosure.

[0045] Figure 2 is a bottom view of a battery pack according to an embodiment of the present disclosure.

[0046] Figure 3 is a structural schematic view of a connecting piece of a battery pack according to an embodiment of the present disclosure.

[0047] Figure 4 is a partial sectional view of a partial structure of a battery pack in a first direction according to an embodiment of the present disclosure.

[0048] Figure 5 is a sectional view of a partial structure of a battery pack according to an embodiment of the present disclosure. Figure 4 is a partial enlarged view at C in FIG. 10.

[0049] Figure 6 is a partial enlarged view at D in FIG. 10. Figure 4

[0050] Figure 7 is a sectional view of a partial structure of a battery pack according to an embodiment of the present disclosure.

[0051] Figure 8 is a partial enlarged view at E in FIG. 11. Figure 7

[0052] is a partial enlarged view at F in FIG. 11. Figure 9 Figure 7

[0053] Explanation of Reference Signs

[0054] 1, housing body;

[0055] 2, bottom plate; 21, bottom plate frame; 22, bottom plate body; 220, mounting groove; 221, second mounting hole 221; 222, fourth mounting hole;

[0056] 3, connecting piece; 31, first connecting component; 311, first edge beam; 312, second edge beam; 313, third edge beam; 314, fourth edge beam; 32, second connecting component; 321, intermediate cross beam; 3211, first connecting part; 322, intermediate longitudinal beam; 3221, second connecting part; 30, gap filling; 301, first connecting section; 302, second connecting section; 303, third connecting section; 3030, gap filling;

[0057] 4, thermal management component; 401, heat exchange region; 402, spacing region; 41, first plate piece; 411, base plate part; 412, protruding part; 4121, flat plate; 4122, bent plate; 413, thermal management flow channel; 42, second plate piece;

[0058] 5, first fastener; 6, second fastener; 7, third fastener; 8, partition plate;​​​

[0059] A, first direction; B, second direction. DETAILED DESCRIPTION

[0060] The exemplary embodiments will be described in detail herein with reference to the attached drawings. In the following description, the same numbers are used to indicate the same or similar elements, unless otherwise represented. The embodiments described in the following exemplary embodiments do not represent all the embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0061] In the present disclosure, the directional words "first direction, second direction" are used to indicate two intersecting directions, and specifically, the first direction and the second direction can be perpendicular to each other, and specific reference can be made to Figure 1 and Figure 2 .

[0062] The directional words such as "inner, outer" are used to indicate the inner and outer of the specific structure profile, and the terms such as "first, second" are only used to distinguish one element from another element, and do not have sequentiality and importance, and in addition, the plural in the present application refers to two or more and includes two.

[0063] In the description of the present disclosure, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set", "connected" should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0064] Referring to Figures 1 to 9 , the present disclosure provides a battery pack, which comprises a shell body 1, a bottom plate 2 and a connecting piece 3. The bottom plate 2 comprises a bottom plate frame 21 and a bottom plate body 22 connected to each other, the bottom plate frame 21 is arranged at the circumferential area of the bottom plate body 22, and the bottom plate frame 21 is connected with the shell body 1, so that the shell body 1 and the bottom plate 2 enclose a shell cavity 10. The connecting piece 3 is at least partially arranged in the shell cavity 10, and the connecting piece 3 at least connects the bottom plate body 22 and the shell body 1.

[0065] In the above technical solution, the bottom plate frame 21 of the bottom plate 2 is connected to the shell body 1, so that the shell body 1 and the bottom plate 2 are connected to each other and surround the shell cavity 10. By arranging the connecting piece 3 in the shell cavity 10, and the connecting piece 3 connecting at least the bottom plate body 22 and the shell body 1, the connecting piece 3 serves as an intermediate connecting piece, effectively connecting the bottom plate body 22 to the shell body 1, reducing the problem of the bottom plate body 22 collapsing, ensuring that the gap between the bottom plate 2 and the ground is within a safe gap range, and reducing the problem of scratching the bottom. In addition, by arranging the connecting piece 3 and connecting the bottom plate body 22 and the shell body 1, the strength of the connection of the bottom plate 1 to the shell body 1 is improved, thereby improving the rigidity of the entire battery pack.

[0066] In one embodiment, referring to Figure 1 and Figure 3 , the connecting piece 3 includes a first connecting component 31 and a second connecting component 32. The first connecting component 31 is connected between the bottom plate frame 21 and the shell body 1, and the second connecting component 32 is connected to the first connecting component 31 and arranged in the shell cavity 10 and connected to the bottom plate body 22.

[0067] In this embodiment, the connecting piece 3 is arranged in two parts, the first connecting component 31 and the second connecting component 32. The first connecting component 31 and the second connecting component 32 are both connected to the shell body 1, but the first connecting component 31 is connected to the bottom plate frame 21 of the bottom plate 2, and the second connecting component 32 is connected to the bottom plate body 22 of the bottom plate 2. That is, by arranging the first connecting component 31 and the second connecting component 32, the bottom plate frame 21 and the bottom plate body 22 of the bottom plate 2 are both connected to the shell body 1, further improving the strength of the connection of the bottom plate 2 to the shell body 1.

[0068] The first connecting component 31 and the second connecting component 32 can be configured in any appropriate shape and structure, and the present disclosure does not limit this. In addition, the first connecting component 31 and the second connecting component 32 can be two parts that are independent of each other and are connected, or the first connecting component 31 and the second connecting component 32 can be configured as an integrally formed structure, and the present disclosure does not limit this.

[0069] Optionally, referring to Figure 1 and Figure 3 , the second connecting component 32 includes at least one intermediate cross beam 321 extending along the first direction A and connected to the bottom plate body 22. And / or, the second connecting component 32 includes at least one intermediate longitudinal beam 322 extending along the second direction B and connected to the bottom plate body 22; wherein the first direction A and the second direction B are arranged intersecting each other.

[0070] That is, by arranging the intermediate cross beams 321 and / or the intermediate longitudinal beams 322, the bottom plate body 22 is facilitated to be connected in the first direction A and / or the second direction B, and the convenience of connection is improved.

[0071] For example, the second connecting component 32 can include one intermediate cross beam 321 connected with the bottom plate body 22, or the second connecting component 32 can include a plurality of intermediate cross beams 321 connected with the bottom plate body 22.

[0072] Alternatively, the second connecting component 32 can include one intermediate longitudinal beam 322 connected with the bottom plate body 22. The second connecting component 32 can include a plurality of intermediate longitudinal beams 322 connected with the bottom plate body 22.

[0073] Alternatively, the second connecting component 32 can include one intermediate cross beam 321 and one intermediate longitudinal beam 322. Alternatively, the second connecting component 32 can include one intermediate cross beam 321 and a plurality of intermediate longitudinal beams 322. Alternatively, the second connecting component 32 can include a plurality of intermediate cross beams 321 and one intermediate longitudinal beam 322. Alternatively, the second connecting component 32 can include a plurality of intermediate cross beams 321 and a plurality of intermediate longitudinal beams 322. The present disclosure does not limit the specific design of the intermediate cross beams 321 and the intermediate longitudinal beams 322.

[0074] Optionally, as shown in Figure 1 and Figure 3 The intermediate cross beams 321 and the intermediate longitudinal beams 322 are staggered, and the uniformity of the second connecting component 32 connected to the bottom plate body 22 is effectively improved by staggering the intermediate cross beams 321 and the intermediate longitudinal beams 322. However, the present disclosure does not limit this, and in other embodiments, the intermediate cross beams 321 and the intermediate longitudinal beams 322 can not intersect, the intermediate cross beams 321 are connected to the first region of the bottom plate body 22, and the intermediate longitudinal beams 322 are connected to the second region of the bottom plate body.

[0075] Optionally, as shown in Figure 3 The first connecting component 31 includes a first side beam 311 and a second side beam 312, the first side beam 311 and the second side beam 312 are arranged in the second direction B and are oppositely and spacedly arranged in the first direction A; the intermediate cross beams 321 are arranged in a plurality, the plurality of intermediate cross beams 321 are spacedly arranged in the second direction B, and the intermediate cross beams 321 are connected between the first side beam 311 and the second side beam 312.

[0076] In this embodiment, by arranging the first side beam 311 and the second side beam 312 extending in the second direction B, the plurality of intermediate cross beams 321 are facilitated to be installed, the stability of the intermediate cross beams 321 is ensured, and the stability of the bottom plate body 22 connected to the shell body 1 is improved.

[0077] Optionally, referring to Figure 3 As shown, the first connecting component 31 comprises a third edge beam 313 and a fourth edge beam 314, the third edge beam 313 and the fourth edge beam 314 are arranged in the first direction A and are opposite and spaced apart in the second direction B, and the intermediate longitudinal beam 322 is connected to the third edge beam 313 and / or the fourth edge beam 314.

[0078] By connecting the intermediate longitudinal beam 322 to the third edge beam 313 and / or the fourth edge beam 314, the stability of the connection of the intermediate longitudinal beam 322 is improved.

[0079] For example, in an embodiment, the first connecting component 31 comprises a first edge beam 311, a third edge beam 313, a second edge beam 312 and a fourth edge beam 314 connected in sequence, wherein the first edge beam 311 and the second edge beam 312 extend in the second direction B and are opposite and spaced apart in the first direction A, and the third edge beam 313 and the fourth edge beam 314 extend in the first direction A and are opposite and spaced apart in the second direction B. The intermediate transverse beam 321 is provided in three, the three intermediate transverse beams 321 are uniformly spaced apart two by two in the second direction B, the intermediate longitudinal beam 322 is provided in one, the intermediate longitudinal beam 322 is staggered with the three intermediate transverse beams 321 and is located at the middle position of the intermediate transverse beams 321 in the first direction A, and the intermediate longitudinal beam 322 is connected to the third edge beam 313.

[0080] Among them, for the staggered arrangement of the intermediate longitudinal beam 322 and the intermediate transverse beam 321, the intermediate longitudinal beam 322 can be overlapped on the intermediate transverse beam 321, or an installation opening (not shown) can be formed at the middle position of each intermediate transverse beam 321 in the first direction A, and the intermediate longitudinal beam 322 is inserted into the installation opening and connected with the intermediate transverse beam 321, and the present disclosure does not limit the staggered arrangement of the intermediate longitudinal beam 322 and the intermediate transverse beam 321.

[0081] Optionally, referring to Figure 3 As shown, the intermediate transverse beam 321 is provided with a plurality of first connecting portions 3211 arranged in the first direction A, and the intermediate transverse beam 321 is connected to the bottom plate body 22 through the plurality of first connecting portions 3211, so as to improve the uniformity and stability of the connection of the intermediate transverse beam 321 and the bottom plate body 22 in the first direction A.

[0082] For example, the first connecting part 3211 can be configured as a first mounting hole, and the bottom plate body 22 is correspondingly provided with a second mounting hole 221. By arranging a first fastener 5 and penetrating the first mounting hole and the second mounting hole 221, the connection between the intermediate cross beam 321 and the bottom plate body 22 is achieved. The first fastener 5 can be configured as a bolt-nut assembly, but the specific structure of the first connecting part 3211 is not limited in the present disclosure. In other forms, the first connecting part 3211 can also be configured as a first clamping protrusion (not shown), and the inner wall of the bottom plate body 22 is provided with a first clamping groove (not shown). The first clamping protrusion and the first clamping groove can be clamped and matched with each other.

[0083] Optionally, referring to Figure 3 It is shown that the intermediate longitudinal beam 322 is provided with a plurality of second connecting parts 3221 arranged at intervals along the second direction B. The intermediate longitudinal beam 322 is connected with the bottom plate body 22 through the plurality of second connecting parts 3221, so as to improve the uniformity and stability of the connection between the intermediate longitudinal beam 322 and the bottom plate body 22 in the second direction B.

[0084] For example, the second connecting part 3221 can be configured as a third mounting hole, and the bottom plate body 22 is correspondingly provided with a fourth mounting hole 222. By arranging a second fastener 6 and penetrating the third mounting hole and the fourth mounting hole 222, the connection between the intermediate longitudinal beam 322 and the bottom plate body 22 is achieved. The second fastener 6 can be configured as a bolt-nut assembly, but the specific structure of the second connecting part 3221 is not limited in the present disclosure. In other forms, the second connecting part 3221 can also be configured as a second clamping protrusion (not shown), and the inner wall of the bottom plate body 22 is provided with a second clamping groove (not shown). The second clamping protrusion and the second clamping groove can be clamped and matched with each other.

[0085] In addition, referring to Figure 1 and Figure 2 It is shown that the bottom plate body 22 is recessed to be provided with a mounting groove 220 extending along the second direction B. The mounting groove 220 is arranged opposite to the intermediate longitudinal beam 322 and connected with each other. The length of the mounting groove 220 extending along the second direction B is not less than the length of the intermediate longitudinal beam 322 extending along the second direction B.

[0086] In this embodiment, by arranging the mounting groove 220 extending along the second direction B on the bottom plate body 22, the mounting groove 220 can improve the stability of the whole bottom plate 2 by increasing the rigidity of the local area. Especially when subjected to lateral force or torsional force, this design helps to disperse stress and reduce the possibility of deformation of the bottom plate 2. In addition, the length of the mounting groove 220 extending along the second direction B is not less than the length of the intermediate longitudinal beam 322 extending along the second direction B, which facilitates the connection of the intermediate longitudinal beam 322 to the bottom plate 2 through the mounting groove 220.

[0087] For example, the fourth mounting hole 222 is provided in plurality, and the plurality of fourth mounting holes 222 are arranged in the mounting groove 220 in pairs and spaced apart in the second direction B. By arranging the second fastener 6 and penetrating the fourth mounting hole 222 and the second connecting portion 3221 configured as the third mounting hole, the intermediate longitudinal beam 322 and the bottom plate body 22 are fastened and connected.

[0088] In an embodiment, referring to Figure 1 , the battery pack further comprises a thermal management component 4 arranged in the cavity 10 and connected with the housing body 1, and at least part of the connecting member 3 is arranged between the thermal management component 4 and the bottom plate 2.

[0089] In this embodiment, the thermal management component 4 can be used to regulate the temperature of the battery module (not shown) arranged in the cavity 10, so that the battery module is in an ideal temperature range. By arranging at least part of the connecting member 3 between the thermal management component 4 and the bottom plate 2, the space between the thermal management component 4 and the bottom plate 2 is effectively utilized, and the compactness of the structural design is improved. In addition, the thermal management component 4 described above can be configured as a liquid cooling plate, but the specific structure and type of the thermal management component 4 is not limited in the present disclosure.

[0090] Optionally, at least part of the connecting member 3 is connected with the thermal management component 4, that is, one side of the connecting member 3 is connected with the bottom plate 2, and the other side of the connecting member 3 is connected with the thermal management component 4 and the housing body 1, further improving the stability of the connection of the connecting member 3.

[0091] In other embodiments, the connecting member 3 can not have a connection relationship with the thermal management component 4, which is not limited in the present disclosure.

[0092] In an embodiment, referring to Figure 1 and Figure 3 , the connecting member 3 comprises a first connecting component 31 and a second connecting component 32; the first connecting component 31 is connected between the bottom plate frame 21 and the housing body 1, the second connecting component 32 is arranged in the cavity 10 and connected with the first connecting component 31, the second connecting component 32 is arranged between the bottom plate 2 and the thermal management component 4, and the second connecting component 32 is connected with the bottom plate 2 and the thermal management component 4.

[0093] In this embodiment, firstly, the first connecting component 31 connects the bottom plate frame 21 and the shell body 1, which enhances the structural rigidity of the whole battery pack and improves the resistance to external impact or vibration. Secondly, the second connecting component 32 is arranged between the bottom plate 2 and the thermal management component 4, which further strengthens the binding force between the internal components and ensures good mechanical integrity even in extreme cases, prevents the bottom plate body 22 from collapsing, ensures that the gap between the bottom plate 2 and the ground is within a safe gap range, and reduces the problem of scraping the bottom. In addition, the second connecting component 32 can also be used as a “thermal bridge” to promote the uniform distribution of heat transferred by the thermal management component 4 on the whole bottom plate 2, reduce the temperature difference, and thus improve the performance of the battery pack and prolong the service life of the battery pack. In other embodiments, as shown in

[0094] In other embodiments, as shown in Figure 1 and Figure 5 The battery pack further comprises a first fastener 5 and a second fastener 6. Part of the second connecting component 32 is detachably connected to the bottom plate body 22 through the first fastener 5, and part of the second connecting component 32 is detachably connected to the bottom plate body 22 and the thermal management component 4 through the second fastener 6. That is, part of the second connecting component 32 is used to connect the bottom plate body 22 through the first fastener 5, and part of the second connecting component 32 is used to connect the bottom plate body 22 and the thermal management component 4 through the second fastener 6, so as to meet the needs of different installation strengths at different positions. In addition, the present disclosure does not limit the specific installation method, and the connection between different structures can also be achieved by clamping or other methods, which are not limited by the present disclosure.

[0095] In other embodiments, as shown in Figure 1 The thermal management component 4 comprises at least two heat exchange regions 401, and a spacing region 402 is arranged between adjacent two heat exchange regions 401. Part of the second connecting component 32 is detachably connected to the bottom plate body 22 through the first fastener 5 and is arranged opposite to the heat exchange region 401. Part of the second connecting component 32 is detachably connected to the bottom plate body 22 and the spacing region 402 through the second fastener 6.

[0096] In this embodiment, considering the design of arranging heat exchange flow channels and other structures in the heat exchange region 401 of the thermal management component 4, in order to reduce the damage to the structural strength or heat exchange function of the heat exchange region 401 of the thermal management component 4, part of the second connecting component 32 opposite to the heat exchange region 401 is not connected to the heat exchange region 401 through the first fastener 5, so as to ensure the structural integrity of the heat exchange region 401. The spacing region 402 between adjacent two heat exchange regions 401 does not arrange the flow channels and other structures required for heat exchange, and part of the second connecting component 32 opposite to the spacing region 402 can be connected to the spacing region 402 and the bottom plate body 22 through the second fastener 6.

[0097] For example, the second connecting component 32 described above comprises at least one intermediate cross beam 321 and at least one intermediate longitudinal beam 322, the intermediate cross beam 321 extends along the first direction A and is arranged opposite to the heat exchange area 401, and the intermediate longitudinal beam 322 extends along the second direction B and is arranged opposite to the interval area 402. Wherein, the intermediate cross beam 321 is connected with the bottom plate body 22 through the first fastener 5, and the intermediate longitudinal beam 322 is connected with the interval area 402 and the bottom plate body 22 through the second fastener 6.

[0098] In addition, referring to Figure 1 and Figure 6 , the battery pack can further comprise a third fastener 7, the first connecting component 31 is arranged between the bottom plate frame 21 and the shell body 1, and the third fastener 7 is arranged in plurality and sequentially penetrates the bottom plate frame 21, the first connecting component 31 and the shell body 1.

[0099] Optionally, referring to Figure 7 , the battery pack further comprises a battery module (not shown) and at least one partition plate 8, the battery module and the partition plate 8 are arranged in the shell cavity 10, the battery module comprises at least two battery modules (not shown), and the adjacent two battery modules are arranged in a separated manner by the partition plate 8; wherein, the heat exchange area 401 is arranged opposite to the battery module, and the interval area 402 is arranged opposite to the partition plate 8, and the second fastener 6 detachably connects the partition plate 8, the interval area 402, the second connecting component 32 and the bottom plate body 22.

[0100] In this embodiment, the battery modules can work independently or simultaneously, and the present disclosure does not limit this. By arranging the heat exchange area 401 opposite to the battery module, for example, the heat exchange area 401 is arranged one-to-one corresponding to the battery module, the heat exchange of each battery module can be performed individually, so that even if part of the battery modules or part of the heat exchange areas 401 cannot work normally due to failure, the other battery modules and heat exchange areas 401 can work normally, thereby improving the reliability of the battery pack. In addition, by arranging the partition plate 8 to separate the battery modules in different areas, the partition plate 8 plays a role of insulation and thermal insulation. By arranging the interval area 402 opposite to the partition plate 8, the partition plate 8 arranged in the shell cavity 10 provides a mounting basis for the installation of the second fastener 6, thereby detachably connecting the partition plate 8, the interval area 402, the second connecting component 32 and the bottom plate body 22 through the second fastener 6, realizing the stable connection of the partition plate 8, the interval area 402, the second connecting component 32 and the bottom plate body 22, and improving the strength of the connection.

[0101] For example, the battery module as described above can include two battery modules, and the partition plate 8 can be provided as one, and the two battery modules and the partition plate 8 are all arranged in the cavity 10 of the shell, and the partition plate 8 divides the cavity 10 of the shell into two areas, and the two battery modules are arranged in the two areas respectively.

[0102] Optionally, at least part of the connecting piece 3 and the heat management component 4 define a filling gap 30; the battery pack further includes an adhesive, and the adhesive is filled in the filling gap 30.

[0103] That is, in addition to the above-mentioned connection of the connecting piece 3 by the fastener, the connecting piece 3 can also be bonded by the adhesive, further improving the strength of the connection.

[0104] Referring to Figures 7 to 9 The heat management component 4 includes a first plate 41 and a second plate 42, the first plate 41 includes a base plate part 411 and at least one protruding part 412 connected; the base plate part 411 is arranged in close contact with the second plate 42; the protruding part 412 protrudes towards the bottom plate 2 relative to the second plate 42, and defines a heat management flow channel 413 with the second plate 42 for accommodating the heat management medium; the connecting piece 3 is arranged on the side of the first plate 41 away from the second plate 42, and defines a filling gap 30 with the protruding part 412 and / or the base plate part 411.

[0105] In this embodiment, the heat management flow channel 413 defined by the protruding part 412 and the second plate 42 is used for the heat management medium to flow, for example, it can play a role of heat exchange. The connecting piece 3 is arranged on the side of the first plate 41 away from the second plate 42, and defines a filling gap 30 with the protruding part 412 and / or the base plate part 411, facilitating the filling of the adhesive.

[0106] In one embodiment, referring to Figure 8 and Figure 9 The protruding part 412 includes a flat plate 4121 and two bent plates 4122; one end of one of the bent plates 4122 is connected to the base plate part 411, and the other end is connected to one side of the flat plate 4121; the other end of the other bent plate 4122 is connected to the other side of the flat plate 4121; in the direction away from the base plate part 411, the bent plate 4122 extends towards the bottom plate 2, and at least one bent plate 4122 is used to define the filling gap 30. However, the specific shape of the protruding part 412 is not limited in the present disclosure.

[0107] For example, referring to Figure 8As shown, the protruding portions 412 can be provided as at least two, and the two adjacent protruding portions 412 are connected by the base plate portion 411, and the connecting member 3 is provided between the two flat plates 4121 of the two adjacent protruding portions 412 to define the filling gap 30 between the two adjacent protruding portions 412 for filling of the adhesive, thereby improving the stability of the bonding.

[0108] In other embodiments, referring to Figure 9 As shown, the connecting member 3 includes a first connecting segment 301, a second connecting segment 302 and a third connecting segment 303 connected in sequence; the first connecting segment 301 is provided on the base plate portion 411, the second connecting segment 302 extends in the same direction as one of the bent plates 4122 of the protruding portions 412 and is provided in a spaced manner, and the third connecting segment 303 is provided on the flat plate 4121 of the protruding portion 412 to define the filling gap 30, that is, the connecting member 3 is designed to be bent and cooperates with the first plate member 41 to define the filling gap 30 for filling of the adhesive, thereby improving the stability of the bonding.

[0109] Optionally, referring to Figure 9 As shown, at least part of the third connecting segment 303 is provided in a spaced manner with the flat plate 4121 to form a filling gap 3030 for filling of the adhesive; the filling gap 3030 and the filling gap 30 are in communication with each other, thereby further improving the stability of the bonding.

[0110] Optionally, the thermal management component 4 can be welded with the housing body 1 and a welding seam area is formed, and the adhesive is also bonded between the housing body 1 and the first connecting component 31 to cover the welding seam area, thereby strengthening the structural strength at the welding seam area, that is, improving the connection strength among the thermal management component 4, the housing body 1 and the first connecting component 31.

[0111] In addition, the above-mentioned battery pack can be configured as a cuboid battery pack, the first direction A can be the width direction of the cuboid battery pack, and the second direction B can be the length direction of the cuboid battery pack. Alternatively, the first direction A can be the length direction of the cuboid battery pack, and the second direction can be the width direction of the cuboid battery pack, and the present disclosure does not limit the specific type of the use device.

[0112] The present disclosure also provides a use device, which includes the above-mentioned battery pack, wherein the use device includes a vehicle, but the present disclosure does not limit the specific type of the use device, for example, the use device can also be a spacecraft or a ship, etc.

[0113] Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

[0114] It will be understood that the present disclosure is not limited to the precise structures hereinbefore described and illustrated in the drawings, and that various modifications and changes can be made without departing from its scope. The scope of the present disclosure is limited only by the claims that follow.

Claims

1. A battery pack, characterized by, The battery pack comprises a shell body, a bottom plate and a connecting member; The bottom plate comprises a bottom plate frame and a bottom plate body connected with each other, the bottom plate frame is arranged at a circumferential area of the bottom plate body, and the bottom plate frame is connected with the shell body so as to enclose a shell cavity with the shell body and the bottom plate; The connecting member is at least partially arranged in the shell cavity, and the connecting member at least connects the bottom plate body and the shell body.

2. The battery pack of claim 1, wherein, The connecting member comprises a first connecting component and a second connecting component; The first connecting component is connected between the bottom plate frame and the shell body, the second connecting component is connected with the first connecting component, and the second connecting component is arranged in the shell cavity and connected with the bottom plate body.

3. The battery pack of claim 2, wherein, The second connecting component comprises at least one intermediate cross beam extending along a first direction and connected with the bottom plate body; and / or, the second connecting component comprises at least one intermediate longitudinal beam extending along a second direction and connected with the bottom plate body; wherein the first direction and the second direction are arranged intersectingly.

4. The battery pack of claim 3, wherein, The second connecting component comprises at least one intermediate cross beam extending along a first direction and connected with the bottom plate body; The second connecting component comprises at least one intermediate longitudinal beam extending along a second direction and connected with the bottom plate body; wherein the first direction and the second direction are arranged intersectingly. The intermediate cross beams and the intermediate longitudinal beams are arranged alternately.

5. The battery pack of claim 3, wherein, The first connecting component comprises a peripheral frame, and the intermediate cross beams and the intermediate longitudinal beams are located in the peripheral frame; At least one end of the intermediate cross beam along the first direction is connected to the peripheral frame, and at least one end of the intermediate longitudinal beam along the second direction is connected to the peripheral frame.

6. The battery pack of any one of claims 3-5, wherein, The intermediate cross beam is provided with a plurality of first connecting portions arranged at intervals along the first direction and used for connecting with the bottom plate body; and / or, The intermediate longitudinal beam is provided with a plurality of second connecting portions arranged at intervals along the second direction and used for connecting with the bottom plate body.

7. The battery pack of any one of claims 3-5, wherein, The bottom plate body is recessed to be provided with mounting grooves extending along the second direction, the mounting grooves are arranged opposite to the intermediate longitudinal beams and connected with each other; wherein the length of the mounting grooves extending along the second direction is not less than the length of the intermediate longitudinal beams extending along the second direction.

8. The battery pack of claim 1, wherein, The battery pack further comprises a heat management component arranged in the shell cavity and connected with the shell body, and at least part of the connecting member is arranged between the heat management component and the bottom plate.

9. The battery pack of claim 8, wherein, At least part of the connecting member is connected with the heat management component.

10. The battery pack of claim 9, wherein, The connecting member comprises a first connecting component and a second connecting component; The first connecting component is connected between the bottom plate frame and the shell body, the second connecting component is arranged in the shell cavity and connected with the first connecting component, and the second connecting component connects the bottom plate and the heat management component.

11. The battery pack of claim 9, wherein, The heat management component comprises at least two heat exchange areas, and a spacing area is arranged between adjacent two heat exchange areas. The connecting piece comprises a first part and a second part, the first part is arranged opposite to the heat exchange region, and the second part is arranged opposite to the spacing region; The first part is connected to the bottom plate body, and the second part connects the bottom plate body and the spacing region.

12. The battery pack of claim 11, wherein, The battery pack further comprises a battery module and at least one partition plate, both of which are arranged in the shell cavity, the battery module comprises at least two battery modules, and the adjacent two battery modules are arranged by the partition plate; The heat exchange region is arranged opposite to the battery module, and the spacing region is arranged opposite to the partition plate and connected to each other.

13. The battery pack of claim 9, wherein, At least part of the connecting piece and the thermal management component define a filling gap; The battery pack further comprises an adhesive, which is filled in the filling gap.

14. The battery pack of claim 13, wherein, The thermal management component comprises a first plate and a second plate, the first plate comprises a connected base plate part and at least one protruding part; The base plate part is arranged in close contact with the second plate, and the protruding part protrudes towards the bottom plate relative to the second plate and defines a thermal management flow channel for containing thermal management medium between the second plate; The connecting piece is arranged on the side of the first plate away from the second plate and defines the filling gap with the protruding part and / or the base plate part.

15. The battery pack of claim 14, wherein, The protruding part comprises a flat plate and two bent plates; One end of one of the bent plates is connected to the base plate part, and the other end is connected to one side of the flat plate, and one end of the other bent plate is connected to the base plate part, and the other end is connected to the other side of the flat plate; In the direction away from the base plate part, the bent plate extends towards the bottom plate, and at least one of the bent plates is used to define the filling gap.

16. The battery pack of claim 15, wherein, The protruding part is provided as at least two, and the adjacent two protruding parts are connected by the base plate part, and the connecting piece is arranged between the two flat plates of the adjacent two protruding parts to define the filling gap between the adjacent two protruding parts.

17. The battery pack of claim 15, wherein, The connecting piece comprises a first connecting segment, a second connecting segment and a third connecting segment connected in sequence; The first connecting segment is arranged on the base plate part, the second connecting segment extends in the same direction as one of the bent plates of the protruding part and is arranged in a spaced manner, and the third connecting segment is arranged on the flat plate of the protruding part to define the filling gap.

18. The battery pack of claim 17, wherein, At least part of the third connecting segment is arranged in a spaced manner with the flat plate to form a filling gap for the adhesive; wherein the filling gap and the filling gap are in communication with each other.

19. The battery pack of claim 13, wherein, The thermal management component is welded to the shell body and forms a weld region, and the adhesive is further bonded between the shell body and the connecting piece to cover the weld region.

20. An electrical device, comprising: The electric device comprises the battery pack of any one of claims 1-19; wherein the electric device comprises a vehicle.

Images