Battery pack and electric equipment

Abstract

The utility model relates to the technical field of batteries, and discloses a battery pack and electric equipment. A plurality of battery cells; the multiple cooling assemblies are arranged at intervals in the first direction; the cooling assembly comprises a plurality of heat exchange sections which are sequentially connected, and an included angle is formed between every two adjacent heat exchange sections. The supporting assembly is arranged in the space between the heat exchange section and the first side edge beam, and when the first side edge beam of the battery pack is impacted and even deformed, the supporting assembly is impacted before the battery cells and the cooling assemblies, so that the battery cells and the cooling assemblies are cooled, and the battery cells and the cooling assemblies are cooled, so that the battery cells and the cooling assemblies are cooled, and the battery cells and the cooling assemblies are cooled. In the process that the supporting structure is preferentially crushed, part of stress can be buffered, part of deformation can be absorbed, the impact borne by the subsequent battery cell can be effectively reduced, and the supporting assembly has the functions of supporting, clamping and positioning the heat exchange part, and meanwhile, the side collision resistance of the battery pack can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery pack and electrical equipment. Background Art

[0002] The battery pack is a core component of electric vehicles, storing electrical energy and powering the electric motor. It is a key component that distinguishes electric vehicles from traditional internal combustion engine vehicles, and its performance directly impacts the vehicle's range and performance. Battery packs can be damaged in a collision, leading to internal short circuits, thermal runaway, and even fire and explosion. Good crash resistance can mitigate these risks and protect the safety of vehicle occupants.

[0003] At present, since the battery pack is usually installed at the bottom of the vehicle and is far away from the front and rear sides of the vehicle but close to the sides, the risk of damage to the battery pack is greater when the side of the vehicle is hit. When the side of the battery pack is impacted, the deformation and force transmission of the box and internal components can easily act on the battery cells. Once the battery cells are damaged, there is a risk of thermal runaway or even explosion. Utility Model Content

[0004] In view of this, the present invention provides a battery pack and an electrical device to solve the problem of poor safety after the side of the existing battery pack is hit.

[0005] In a first aspect, the present invention provides a battery pack, comprising: a box, comprising a frame and a cover, the frame and the cover enclosing a storage space; a plurality of battery cells disposed in the storage space; a plurality of cooling assemblies disposed in the storage space, the plurality of cooling assemblies being spaced apart along a first direction; the cooling assemblies comprising a plurality of heat exchange segments, the plurality of heat exchange segments being sequentially connected and arranged along a second direction, an angle being formed between two adjacent heat exchange segments, and the angle being an obtuse angle; in two adjacent cooling assemblies, the heat exchange segment of one cooling assembly is disposed opposite to the heat exchange segment of the other cooling assembly, the two heat exchange segments defining a mounting position, and at least one battery cell being disposed in the mounting position; A support assembly is arranged in the accommodating space; the frame has a first side beam along one side of the first direction, and the multiple cooling assemblies include a first cooling assembly located at the edge along the first direction. The first side beam and the first cooling assembly are both located on the same side of the battery pack along the first direction, and there is a gap between the first cooling assembly and the first side beam, and the support assembly is arranged in the gap; wherein, the support assembly includes a main body and a support structure arranged on the main body; the main body extends along the second direction, and the support structure extends along the first direction; one side of the main body along the first direction abuts the heat exchange section of the first cooling assembly, and the other side of the main body along the first direction abuts the first side beam through the support structure.

[0006] Beneficial effects: The heat exchange section of the heat exchange part is arranged in a broken line shape, and the support assembly is arranged in the space between the heat exchange section and the first side beam. When the first side beam of the battery pack is impacted or even deformed, the support assembly will be impacted before the battery cell and the cooling assembly. During the process of the support structure being crushed first, part of the stress can be buffered and part of the deformation can be absorbed, which can effectively reduce the impact on the subsequent battery cell. The support assembly supports and clamps the heat exchange part, and also improves the side collision resistance of the battery pack, effectively solving the problem of poor safety of the existing battery pack after being impacted on the side.

[0007] In an optional embodiment, the support structure includes a plurality of first support ribs; the plurality of first support ribs are arranged on the main body in the second direction, and one side of the plurality of first support ribs in the first direction is connected to the main body, and the other side abuts against the first side beam.

[0008] Beneficial effects: The support structure of this form has better support effect, stronger bending resistance and is convenient for processing and manufacturing.

[0009] In an optional embodiment, the battery pack also has a third direction intersecting the first direction and the second direction, and the support structure further includes a plurality of second support ribs, the second support ribs all extend along the second direction and are arranged on the same side of the main body as the first support ribs, the plurality of second support ribs are arranged in the third direction, and the plurality of first support ribs and the plurality of second support ribs are staggered.

[0010] Beneficial effects: The support structure of this form can further enhance the bending resistance of itself, and in addition, the support effect of the staggered support ribs is better, and the force transmission is more uniform.

[0011] In an optional embodiment, in the first direction, the length of one of the second support rib and the first support rib is less than the length of the other.

[0012] Beneficial effects: When the support structure is not subjected to external impact, the second support rib and the first support rib can support each other, preventing the first support rib or the second support rib from toppling over, so that the support rib has sufficient support capacity. When the support structure is subjected to external impact, the support rib of this form is more likely to form a collapsed deformation compared to a complete full solid member. In addition, the combination position of the first support rib and the second support rib can form a recessed space, and the first support rib or the second support rib can enter the recessed space after collapsing to form a relatively flat structure.

[0013] In an optional embodiment, at least one end of the first support rib in the third direction is provided with a chamfer, and the chamfer is located on the side of the first support rib away from the main body.

[0014] Beneficial effect: the support assembly can be more conveniently loaded into the box through the end where the chamfer is located, which can effectively improve the assembly speed and avoid damage to the support assembly due to collision during assembly.

[0015] In an alternative embodiment, the main body has a first surface and a second surface connected to the side of the main body facing the first cooling assembly, and the first surface and the second surface are respectively parallel to the two adjacent heat exchange sections of the first cooling assembly in the first direction.

[0016] Beneficial effect: this form of main body can more reliably cooperate with the outer wall of the heat exchange section, and can avoid the support assembly from moving randomly along the first direction.

[0017] In an alternative embodiment, the support structure has a length in the first direction, and the length of the support structure at the edge of the main body is greater than the length of the support structure at the middle of the main body in the second direction.

[0018] Beneficial effect: this form of support structure has higher structural strength and can more reliably support at the edge of the main body.

[0019] In an alternative embodiment, a plurality of support assemblies are arranged between the first cooling assembly and the first side beam, and the plurality of support assemblies are arranged in the second direction.

[0020] Beneficial effect: the multi-section support assembly is more convenient to manufacture and assemble than the integral support assembly.

[0021] In an alternative embodiment, the battery cell has two first side walls, two second side walls and two third side walls arranged opposite to each other, the two first side walls, the two second side walls and the two third side walls form a hollow cubic structure, the two first side walls are the surfaces with the largest surface area; and the two first side walls are respectively in abutment with the heat exchange sections of the two adjacent cooling assemblies.

[0022] Beneficial effect: this arrangement of the battery cell can make the larger wall surface of the battery cell in contact with the heat exchange section, thereby improving the heat exchange efficiency.

[0023] In a second aspect, the utility model also provides a kind of electric equipment, it includes the battery pack as described above. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0025] Figure 1 A top view of a battery pack according to an embodiment of the present application;

[0026] Figure 2 A three-dimensional schematic view of the battery pack shown in Figure 1

[0027] Figure 3 A three-dimensional schematic view of the battery pack shown in Figure 2

[0028] Figure 4 A three-dimensional schematic view of the battery pack shown in Figure 2

[0029] Figure 5 A three-dimensional schematic view of the battery pack shown in Figure 2

[0030] Explanation of reference signs:

[0031] 1, box; 101, containing space; 102, first side beam; 2, cell; 3, cooling assembly; 301, heat exchange section; 302, first cooling assembly; 4, support assembly; 401, main body; 402, support structure; 4021, first support rib; 4022, second support rib;

[0032] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0034] The embodiments of the present application will be described below in conjunction with Figures 1 to 5

[0035] ​​​​​According to the embodiment of the utility model, on the one hand, a battery pack is provided, comprising: a box body 1, a plurality of battery cells 2, a plurality of cooling assemblies 3 and a support assembly 4, the box body 1 comprises a frame body and a cover body, and the frame body and the cover body enclose a containing space 101;The plurality of battery cells 2 are arranged in the containing space 101;The plurality of cooling assemblies 3 are arranged in the containing space 101, and the plurality of cooling assemblies 3 are arranged at intervals along a first direction X;The cooling assembly 3 comprises a plurality of heat exchange segments 301, the plurality of heat exchange segments 301 are sequentially connected and arranged along a second direction Y, there is an included angle between the two adjacent heat exchange segments 301, and the included angle is obtuse;In the two adjacent cooling assemblies 3, the heat exchange segment 301 of one cooling assembly 3 is arranged opposite to the heat exchange segment 301 of the other cooling assembly 3, and the two heat exchange segments 301 define a mounting position, and at least one battery cell 2 is arranged in the mounting position;The support assembly 4 is arranged in the containing space 101;The frame body has a first side beam 102 on one side along the first direction X, and the first cooling assembly 302 located at the edge along the first direction X is included in the plurality of cooling assemblies 3, the first side beam 102 and the first cooling assembly 302 are located on the same side of the battery pack along the first direction X, and there is a gap between the first cooling assembly 302 and the first side beam 102, and the support assembly 4 is arranged in the gap;Wherein, the support assembly 4 comprises a main body 401 and a support structure 402 arranged on the main body 401;The main body 401 extends along the second direction Y, and the support structure 402 extends along the first direction;One side of the main body 401 along the first direction X abuts against the heat exchange segment 301 of the first cooling assembly 302, and the other side of the main body 401 along the first direction X abuts against the first side beam 102 through the support structure 402.

[0036] In addition, the support assembly 4 has a support state of keeping original shape and a buffer state of absorbing energy and collapsing after being impacted.

[0037] The battery pack of the embodiment is applied, the heat exchange segment 301 of the heat exchange part is arranged in a broken line shape, the support assembly 4 is arranged in the space between the heat exchange segment 301 and the first side beam 102, when the first side beam 102 of the battery pack is impacted and even deformed, the support assembly 4 will be impacted before the battery cell 2 and the cooling assembly 3, and in the process of the support structure 402 being crushed first, part of the stress can be buffered and part of the deformation can be absorbed, so that the impact on the subsequent battery cell 2 can be effectively reduced, the support assembly 4 not only supports and clamps the heat exchange part, but also improves the side anti-collision ability of the battery pack, and effectively solves the problem of poor safety of the existing battery pack after being impacted on the side.

[0038] In addition, since the heat exchange segment 301 is arranged in a broken line shape, after the cooling assembly 3 and the battery cell 2 are assembled, the heat exchange segments corresponding to the adjacent cooling assemblies 3 can directly fix the position of the battery cell 2, without using additional positioning components, so that the number of components required for positioning the battery cell 2 can be effectively reduced.

[0039] It should be noted that the angle between the adjacent heat exchange sections in one cooling assembly is not limited, and can be an obtuse angle, a right angle, an acute angle, etc., as long as it is arranged in a polyline.

[0040] Preferably, the adjacent heat exchange sections in one cooling assembly are arranged at an obtuse angle.

[0041] In an alternative embodiment, the main body 401 is in a plate structure. This form of main body 401 can avoid the support structure 402 directly transmitting force to the cooling assembly 3 and the battery cell 2. After being impacted by the support structure 402, the main body 401 can more evenly transmit the impact to the cooling assembly 3 and the battery cell 2, and can avoid the local protrusions caused by the collapse of the support structure 402 from causing stress concentration and damaging the cooling assembly 3 and the battery cell 2.

[0042] In a possible embodiment, the support structure 402 includes a plurality of first support ribs 4021. The plurality of first support ribs 4021 are arranged on the main body 401 in the second direction and are connected to the main body 401 on one side in the first direction X and abut the first side beam 102 on the other side. This form of support structure 402 has better support effect, stronger bending resistance, and is easy to process and manufacture.

[0043] It can be understood that, as an alternative embodiment, the support structure 402 can also be a point-shaped support block or support column, as long as it can play a supporting role and achieve the function of energy absorption and collapse.

[0044] The extension direction of the first support rib 4021 is not strictly limited and can be arranged in the first direction X.

[0045] In a possible embodiment, the battery pack further has a third direction Z intersecting the first direction X and the second direction Y. The support structure 402 further includes a plurality of second support ribs 4022. The second support ribs 4022 extend along the second direction Y and are arranged on the same side of the main body 401 as the first support ribs 4021. The plurality of second support ribs 4022 are arranged in the third direction Z and the plurality of first support ribs 4021 and the plurality of second support ribs 4022 are staggered. This form of support structure 402 can further enhance the bending resistance of the support structure 402. In addition, the support effect of the staggered support ribs is better and the force transmission is more uniform.

[0046] Specifically, the support structure 402 is in a grid shape.

[0047] The angle between the first support rib 4021 and the second support rib 4022 is not limited and can be an acute angle, a right angle, an obtuse angle, etc., as long as the extension direction of the first support rib 4021 intersects the extension direction of the second support rib 4022.

[0048] In one possible embodiment, along the first direction X, the length of one of the second support rib 4022 and the first support rib 4021 is less than the length of the other. When the support structure 402 is not subjected to an external impact, the second support rib 4022 and the first support rib 4021 can support each other, preventing the first support rib 4021 or the second support rib 4022 from falling over, thereby ensuring that the support ribs have sufficient supporting capacity. When the support structure 402 is subjected to an external impact, this type of support rib arrangement is more likely to cause surface deformation than a complete, fully solid component. In addition, the junction of the first support rib 4021 and the second support rib 4022 can form a recessed space. After the first support rib 4021 or the second support rib 4022 collapses, it can enter the recessed space to form a relatively flat structure.

[0049] As an alternative embodiment, along the first direction X, the lengths of the second support rib 4022 and the first support rib 4021 can also be equal. This arrangement of the support ribs can make the support structure 402 more evenly stressed when resisting external forces, and has a better effect in distributing external forces.

[0050] Specifically, there is no limitation on the specific lengths of the first support rib 4021 and the second support rib 4022 along the first direction X. The lengths of the local first support rib 4021 and the second support rib 4022 can be equal, or the lengths of the local first support rib 4021 and the second support rib 4022 can be unequal. The actual situation can be flexibly selected according to needs and is not strictly limited here.

[0051] Furthermore, there is no limitation on the spacing distance between adjacent first support ribs 4021 and the spacing distance between adjacent second support ribs 4022. They can be arranged with equal spacing distances, or they can be arranged with spacing distances that gradually increase or decrease according to needs, which can be flexibly selected.

[0052] In one possible embodiment, the first support rib 4021 is provided with a chamfer at at least one end along the third direction Z, and the chamfer is located on the side of the first support rib 4021 away from the main body 401. The support component 4 can be more conveniently installed in the box body 1 through the end where the chamfer is located, which can effectively improve the assembly speed and avoid collisions during assembly and premature damage to the support component 4.

[0053] Specifically, there is no strict limitation on the chamfer setting position of the first support rib 4021. The chamfer can be set at only one end along the third direction Z, or at both ends. When chamfers are set at both ends, the support assembly 4 can be rotated 180 degrees and still be conveniently assembled, which can improve the assembly flexibility of the support assembly 4.

[0054] In one possible embodiment, the shape of the main body 401 corresponds to the shape of the heat exchange part and is arranged in a broken line shape. This form of the main body 401 can more reliably cooperate with the outer wall of the heat exchange part. In addition, compared with the main body 401 having only one side of the wall shape in a broken line shape, this form of the main body 401 is also lighter.

[0055] In one possible embodiment, the main body 401 has a first surface and a second surface connected on one side facing the first cooling component 302. Along the first direction X, the first surface and the second surface are respectively opposite to the two adjacent heat exchange sections 301 in the first cooling component 302, and the first surface and the second surface are respectively parallel to the two opposite heat exchange sections 301. This form of main body can more reliably cooperate with the outer wall of the heat exchange part, and can prevent the support component 4 from moving arbitrarily along the first direction X.

[0056] In one possible embodiment, the support structure 402 has a length along the first direction X, and along the second direction Y, the length of the support structure 402 located at the edge of the main body 401 is greater than the length of the support structure 402 located in the middle of the main body. This form of support structure 402 has higher structural strength and can more reliably support the edge of the main body 401.

[0057] In one possible embodiment, there are multiple support assemblies 4 , which are disposed between the first cooling assembly 302 and the first side beam 102 , and are arranged along the second direction Y. Multi-segment support assemblies 4 are easier to manufacture and assemble than integral support assemblies 4 .

[0058] There is no limitation on the number of support components 4 formed by the support components 4 and the number can be flexibly selected according to actual needs.

[0059] Specifically, if Figure 2 As shown, the support assembly 4 formed by the support assembly 4 is provided with four sections, wherein the support distances of three sections along the first direction X first decrease and then increase along the second direction Y, and the support distance of the last section along the first direction X gradually decreases along the second direction Y, wherein the three sections of the support assembly 4 can be positioned and matched with the corresponding heat exchange section 301 through its own structure, and the last section of the support assembly 4 can limit its own displacement along the first direction X through the adjacent support assembly 4 and the inner wall of the box body 1.

[0060] Furthermore, if Figure 3 and Figure 4As shown, in the three-section support assembly 4, the width of the support assembly 4 along the third direction Z decreases first and then increases along the first direction X, and the thickness of the support assembly 4 along the first direction X is smallest at the position where the gap between the heat exchange part and the first side beam 102 of the box body 1 is narrowest, and the width of the support assembly 4 changes in this form, which can effectively adapt to the thickness of the support assembly 4 and effectively improve the bending resistance of the weak position of the support assembly 4.

[0061] In a possible implementation, the battery cell 2 has two first side walls arranged oppositely, two second side walls arranged oppositely, and two third side walls arranged oppositely, the two first side walls, the two second side walls, and the two third side walls enclose a hollow cubic structure, and the two first side walls are the faces with the largest surface area; the two first side walls are respectively in abutment with the heat exchange sections 301 in the two adjacent cooling assemblies, and the battery cell 2 arranged in this form can make the larger wall surface of the battery cell 2 in contact with the heat exchange part, thereby improving the heat exchange efficiency.

[0062] Specifically, each column of battery cells 2 is arranged along the length direction thereof.

[0063] In this embodiment, the number of battery cells 2 between the corresponding two heat exchange sections is not limited to one, and can be multiple.

[0064] Preferably, one side of one heat exchange section is in corresponding cooperation with only one battery cell 2.

[0065] According to the embodiments of the present application, on the other hand, a power consumption device is provided, which comprises the battery pack as described above.

[0066] In a possible implementation, the power consumption device further comprises a control management assembly, which is arranged in the box body 1 of the battery pack and connected with the battery cells 2 of the battery pack.

[0067] The control management assembly comprises a battery management system BMS-BATTERY MANAGEMENT SYSTEM and related components, and the form of the specific battery management system is not limited, and the arrangement and connection form of the existing battery management system can be referred to.

[0068] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.

Claims

1. A battery pack having a first direction (X) and a second direction (Y) intersecting each other, characterized in that: include: The box body (1) comprises a frame body and a cover body, wherein the frame body and the cover body enclose and form a receiving space (101); A plurality of battery cells (2) are arranged in the accommodation space (101); A plurality of cooling assemblies (3) are arranged in the accommodating space (101), and the plurality of cooling assemblies (3) are arranged at intervals along the first direction (X); the cooling assemblies (3) include a plurality of heat exchange sections (301), the plurality of heat exchange sections (301) are connected in sequence and arranged along the second direction (Y), and an angle is formed between two adjacent heat exchange sections (301), and the angle is an obtuse angle; in two adjacent cooling assemblies (3), the heat exchange section (301) of one cooling assembly (3) is arranged opposite to the heat exchange section (301) of the other cooling assembly (3), and the two heat exchange sections (301) define an installation position, and at least one battery cell (2) is arranged in the installation position; A support assembly (4) is arranged in the accommodating space (101); the frame has a first side beam (102) on one side along the first direction (X); the plurality of cooling assemblies (3) include a first cooling assembly (302) located at the edge along the first direction (X); the first side beam (102) and the first cooling assembly (302) are both located on the same side of the battery pack along the first direction (X), and there is a gap between the first cooling assembly (302) and the first side beam (102), and the support assembly (4) is arranged in the gap; wherein, The support assembly (4) comprises a main body (401) and a support structure (402) arranged on the main body (401); the main body (401) extends along the second direction (Y), and the support structure (402) extends along the first direction; the main body (401) abuts against the heat exchange section (301) of the first cooling assembly (302) on one side along the first direction (X), and the main body (401) abuts against the first side beam (102) through the support structure (402) on the other side along the first direction (X).

2. The battery pack according to claim 1, wherein: The support structure (402) includes a plurality of first support ribs (4021); the plurality of first support ribs (4021) are arranged on the main body (401) at intervals along the second direction; the plurality of first support ribs (4021) are connected to the main body (401) on one side along the first direction (X) and abut against the first side beam (102) on the other side.

3. The battery pack according to claim 2, wherein: The battery pack also has a third direction (Z) intersecting with the first direction (X) and the second direction (Y); the support structure (402) further includes a plurality of second support ribs (4022); the second support ribs (4022) all extend along the second direction (Y) and are arranged on the same side of the main body (401) as the first support ribs (4021); the plurality of second support ribs (4022) are arranged at intervals along the third direction (Z), and the plurality of first support ribs (4021) and the plurality of second support ribs (4022) are staggered with each other.

4. The battery pack according to claim 3, wherein: Along the first direction (X), the length of one of the second supporting rib (4022) and the first supporting rib (4021) is smaller than the length of the other.

5. The battery pack according to claim 4, characterized in that: At least one end of the first supporting rib (4021) along the third direction (Z) is provided with a chamfer, and the chamfer is located on a side of the first supporting rib (4021) away from the main body (401).

6. The battery pack according to any one of claims 1 to 5, characterized in that: The main body (401) has a first surface and a second surface connected to one another on a side facing the first cooling component (302); along the first direction (X), the first surface and the second surface are respectively opposite to two adjacent heat exchange sections (301) in the first cooling component (302), and the first surface and the second surface are respectively parallel to the two opposite heat exchange sections (301).

7. The battery pack according to claim 6, characterized in that: The support structure (402) has a length along the first direction (X), and along the second direction (Y), the length of the support structure (402) located at the edge of the main body (401) is greater than that of the support structure (402) located in the middle of the main body.

8. The battery pack according to claim 6, wherein: There are multiple support assemblies (4), and the multiple support assemblies (4) are arranged between the first cooling assembly (302) and the first side beam (102), and the multiple support assemblies (4) are arranged along the second direction (Y).

9. The battery pack according to any one of claims 1 to 5, characterized in that: The battery core (2) has two first side walls arranged opposite to each other, two second side walls arranged opposite to each other, and two third side walls arranged opposite to each other, the two first side walls, the two second side walls, and the two third side walls enclose a hollow cubic structure, and the two first side walls are the surfaces with the largest surface areas; The two first side walls are respectively in contact with the heat exchange sections (301) in two adjacent cooling assemblies.

10. An electrical device, characterized in that: A battery pack comprising the battery pack according to any one of claims 1 to 9.

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