Battery pack and electric device with same

Abstract

This utility model provides a battery pack and an electrical device having the same. The battery pack includes: a battery array comprising multiple battery rows arranged along a first direction, each battery row comprising multiple batteries arranged along a second direction, wherein the first and second directions intersect, and corresponding batteries in two adjacent battery rows are staggered in the second direction. Each battery includes a battery body and a terminal post disposed on a first sidewall of the battery body; a busbar, conductively connected between the terminals of two adjacent batteries; and a first heat exchange plate extending along the first or second direction and correspondingly disposed on the first sidewall, with the busbar and the first heat exchange plate thermally connected. The technical solution of this application can effectively solve the problem of overheating of the terminals and busbars in battery packs in related technologies, which easily leads to thermal runaway.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a battery pack and an electrical device having the same. Background Technology

[0002] In related technologies, busbars are important electrical connection components in battery packs, which can collect and distribute current, allowing multiple batteries in the battery pack to be connected in parallel or series as needed.

[0003] During the operation of the battery pack, the battery terminals and the busbars connected to the terminals generate a certain amount of heat. Especially under high current or poor heat dissipation conditions, the battery pack is prone to thermal runaway. Utility Model Content

[0004] The main objective of this invention is to provide a battery pack and an electrical device having the same, in order to solve the problem of overheating of the terminals and busbars in the battery pack in the related technology, which easily leads to thermal runaway.

[0005] To achieve the above objectives, according to one aspect of the present invention, a battery pack is provided, comprising: a battery array including a plurality of battery rows arranged along a first direction, each battery row including a plurality of batteries arranged along a second direction, wherein the first direction and the second direction intersect, and corresponding batteries in two adjacent battery rows are staggered in the second direction, each battery including a battery body and an electrode post disposed on a first sidewall of the battery body; a busbar, conductively connected between the electrodes of two adjacent batteries; and a first heat exchange plate extending along the first direction or the second direction and disposed corresponding to the first sidewall, wherein the busbar and the first heat exchange plate are thermally connected.

[0006] According to another aspect of the present invention, an electrical device is provided, including a battery pack, wherein the battery pack is the aforementioned battery pack.

[0007] The present invention provides a battery pack comprising a first heat exchange plate corresponding to the first sidewall of the battery. The first heat exchange plate thermally engages with a busbar for connecting adjacent battery terminals, allowing heat from the terminals and busbars to be transferred to the first heat exchange plate, preventing heat accumulation at the terminals and busbars and thus avoiding thermal runaway. Furthermore, two adjacent battery packs are staggered in a second direction towards corresponding batteries, causing the heat exchange surfaces between multiple busbars and the first heat exchange plate to be staggered or increasing the heat exchange surface of a single busbar. This further enhances the utilization of the heat exchange surface of the first heat exchange plate and improves heat dissipation efficiency. Therefore, the present invention effectively solves the problem of overheating of the terminals and busbars in battery packs, which can easily lead to thermal runaway, in related technologies. Attached Figure Description

[0008] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0009] Figure 1 A perspective structural schematic diagram of one embodiment of the battery pack according to the present invention is shown;

[0010] Figure 2 It shows Figure 1 A top view of the battery pack;

[0011] Figure 3 It shows Figure 2 A magnified view of point A on the battery pack;

[0012] Figure 4 It shows Figure 2 A magnified view of point B on the battery pack;

[0013] Figure 5 It shows Figure 1 A schematic diagram of the three-dimensional structure of the battery pack without the busbars;

[0014] Figure 6 It shows Figure 5 A magnified view of point C on the battery pack;

[0015] Figure 7 It shows Figure 5 A top view of part of the battery pack structure;

[0016] Figure 8 It shows Figure 1 A top view of a portion of the battery array structure of a battery pack;

[0017] Figure 9 It shows Figure 1 A three-dimensional structural diagram of the battery pack.

[0018] Figure 10 It shows Figure 1 A three-dimensional structural diagram of the first heat exchange plate, the second heat exchange plate, and the third heat exchange plate of the battery pack;

[0019] Figure 11 A top view schematic diagram of another embodiment of the battery pack according to the present invention is shown;

[0020] Figure 12 It shows Figure 11 A magnified view of the battery pack at point D.

[0021] The above figures include the following reference numerals:

[0022] 10. Battery array; 100. Battery pack; 11. Battery bank; 12. Battery; 121. Battery body; 1211. First sidewall; 122. Terminal post;

[0023] 20. Busbar; 21. First conductive element; 22. Second conductive element; 23. Third conductive element; 24. Fourth conductive element; 25. Fifth conductive element; 26. Sixth conductive element;

[0024] 30. First heat exchange plate; 31. Clearance notch;

[0025] 40. Second heat exchange plate; 41. First flow channel;

[0026] 50. Third heat exchange plate; 51. Second flow channel;

[0027] 61. Inlet pipe; 62. Outlet pipe;

[0028] a) First direction; b) Second direction. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0030] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0031] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0032] like Figures 1 to 4 As shown, this application provides a battery pack. An embodiment of the battery pack includes a battery array 10, a busbar 20, and a first heat exchange plate 30. The battery array 10 includes multiple battery rows 11 arranged along a first direction a, and each battery row 11 includes multiple batteries 12 arranged along a second direction b. The first direction a and the second direction b intersect, and corresponding batteries 12 in adjacent battery rows 11 are staggered in the second direction b. Each battery 12 includes a battery body 121 and a terminal post 122 disposed on a first sidewall 1211 of the battery body 121. The busbar 20 is conductively connected between the terminal posts 122 of two adjacent batteries 12. The first heat exchange plate 30 extends along either the first direction a or the second direction b and is correspondingly disposed to the first sidewall 1211. The busbar 20 and the first heat exchange plate 30 are thermally connected.

[0033] Applying the technical solution of this embodiment, the battery pack includes a first heat exchange plate 30 corresponding to the first sidewall 1211 of the battery 12. The first heat exchange plate 30 is thermally connected to the busbar 20 for connecting the terminals 122 of adjacent batteries 12, so that the heat on the terminals 122 and the busbar 20 can be transferred to the first heat exchange plate 30, preventing heat from accumulating at the terminals 122 and the busbar 20 and causing thermal runaway. In addition, the two adjacent battery packs 11 are staggered in the second direction b towards the corresponding two batteries, so that the heat exchange surfaces between the multiple busbars 20 and the first heat exchange plate 30 are also staggered or the heat exchange surface of a single busbar 20 is increased, thereby making fuller use of the heat exchange surface of the first heat exchange plate 30 and improving heat dissipation efficiency. Therefore, the technical solution of this embodiment can effectively solve the problem of overheating of the terminals and busbars of the battery pack in the related art, which easily leads to thermal runaway.

[0034] It should be noted that in this embodiment, the first heat exchange plate 30 is used to dissipate heat from the busbar 20 and the electrode post 122. Of course, in embodiments not shown in the figure, the first heat exchange plate can also be used to heat the busbar and the electrode post.

[0035] It should be noted that the above-mentioned "the first heat exchange plate 30 extends along the first direction a or the second direction b and is correspondingly arranged with the first side wall 1211" means that the projection of the first heat exchange plate 30 on the plane where the first side wall 1211 is located overlaps with the first side wall 1211.

[0036] like Figures 1 to 4 As shown, the first heat exchange plate 30 is located between the first sidewall 1211 and the busbar 20, and is thermally conductively connected to both the first sidewall 1211 and the busbar 20. One surface of the first heat exchange plate 30 is used to dissipate heat for the battery body 121, and the other surface of the first heat exchange plate 30 is used to dissipate heat for the busbar 20, which can make full use of the heat exchange surface of the first heat exchange plate 30 and improve the heat dissipation efficiency.

[0037] like Figure 5 and Figure 8 As shown, two corresponding batteries 12 in two battery packs 11 located on either side of any one battery pack 11 are arranged facing each other in the second direction b. Two corresponding batteries 12 in two adjacent battery packs 11 have a misalignment distance d1 in the second direction b, where d1 satisfies: 0.5mm ≤ d1 ≤ 20mm. This misalignment of corresponding batteries 12 in adjacent battery packs 11 creates empty areas at the ends of the battery pack corresponding to the battery pack 11, thus affecting the internal space utilization of the battery pack. This can be mitigated by having two battery packs 11 spaced apart by one battery pack 11 (e.g., ...) Figure 8 The batteries 12 in the first battery pack 11 from the left and the third battery pack 11 from the left are arranged facing each other, so that the width of the empty area at the end of each battery pack 11 is only one offset distance d1, thereby reducing the impact of the aforementioned offset arrangement on space utilization. Furthermore, controlling the offset distance d1 within the aforementioned range can balance the heat dissipation effect on the busbar 20 and the terminal post 122 with improving the space utilization within the battery pack. Preferably, the offset distance d1 can be 0.5mm, 2.3mm, 4mm, 5mm, 6mm, 7.7mm, 9.5mm, 11.3mm, 13.1mm, 14.9mm, 16.7mm, 18.5mm, or 20mm.

[0038] like Figure 9As shown, two adjacent battery packs 11 arranged along the first direction a form a battery pack 100. A first heat exchange plate 30 extends along the second direction b and is correspondingly arranged with both battery packs 11 in the battery pack 100. By exchanging heat between the first heat exchange plate 30 and the multiple busbars 20 and terminals 122 of the two battery packs 11 in the battery pack 100, the heat dissipation capacity of the busbars 20 and terminals 122 is improved, while the cost of adding the first heat exchange plate 30 is reduced.

[0039] like Figures 5 to 7 as well as Figure 10 As shown, the first heat exchange plate 30 is provided with a clearance notch 31 for avoiding the electrode post 122. By providing the clearance notch 31 on the first heat exchange plate 30, the width of the first heat exchange plate 30 can be set to be larger, which increases the surface area of ​​the first heat exchange plate 30 that can be used for heat dissipation, while avoiding the electrode post 122 and the connection operation between the electrode post 122 and the busbar 20, so as to realize the placement of the first heat exchange plate 30 between the battery body 121 and the busbar 20.

[0040] Specifically, when assembling the battery 12, the first heat exchange plate 30 and the busbar 20, the first heat exchange plate 30 is first aligned with the battery 12 so that the first heat exchange plate 30 is located above the first side wall 1211, and then the busbar 20 and the terminal post 122 of the battery 12 are connected.

[0041] like Figure 6 and Figure 7 As shown, the sidewall of the clearance notch 31 is spaced apart from the sidewall of the electrode post 122. This arrangement avoids interference between the electrode post 122 and the first heat exchange plate 30, and also reduces the difficulty of aligning the battery 12 and the first heat exchange plate 30 during assembly.

[0042] like Figure 6 and Figure 7 As shown, there is a gap distance d2 between the sidewall of the clearance notch 31 and the sidewall of the pole post 122, and the gap distance d2 satisfies: 0.5mm ≤ d2 ≤ 15mm. By controlling the gap distance d2 within the above range, interference between the pole post 122 and the first heat exchange plate 30 can be avoided, and some of the heat from the pole post 122 can be transferred to the first heat exchange plate 30 through this gap to improve the heat dissipation effect of the pole post 122. Preferably, the gap distance d2 can be 0.5mm, 2mm, 3mm, 5mm, 6.5mm, 8mm, 9.5mm, 11mm, 12.5mm, 14mm, or 15mm.

[0043] Specifically, such as Figure 7As shown, in this embodiment, the pole post 122 is a cylindrical structure with a circular cross-section. The aforementioned "interval distance d2" refers to the distance between the side wall of the clearance notch 31 and the side wall of the pole post 122 in the radial direction of the circle.

[0044] In an embodiment not shown in the figure, the clearance notch may not be provided on the first heat exchange plate. Specifically, the width of the first heat exchange plate remains unchanged in the extending direction of the first heat exchange plate, and the first heat exchange plate is spaced apart from all the terminals in the battery pack.

[0045] like Figure 9 and Figure 10 As shown, the battery pack also includes a second heat exchange plate 40 connected to the first heat exchange plate 30. The second heat exchange plate 40 is located between the two battery rows 11 in the battery pack 100 and is thermally conductively connected to both battery rows 11. The location of the second heat exchange plate 40 between the two battery rows 11 in the battery pack 100 and its thermally conductive connection to both battery rows 11 allows for full utilization of the two heat exchange surfaces of the second heat exchange plate 40, thereby improving heat exchange efficiency.

[0046] like Figure 9 and Figure 10 As shown, the battery pack also includes a third heat exchange plate 50 connected to the second heat exchange plate 40. The third heat exchange plate 50 is correspondingly disposed and thermally connected to the second sidewall of the battery 12. The second sidewall and the first sidewall 1211 are two sidewalls disposed opposite to each other on the battery 12. Through the cooperation of the first heat exchange plate 30, the second heat exchange plate 40 and the third heat exchange plate 50, heat exchange can be achieved on three sides of a single battery pack 11, improving heat exchange efficiency and ensuring the heat exchange effect of the battery pack 11.

[0047] Specifically, a first heat exchange plate 30, a second heat exchange plate 40 and a third heat exchange plate 50 form a heat exchange structure with a vertical cross section of "I". A battery pack 100 cooperates with a heat exchange structure, thereby enabling heat exchange to be carried out on three sides of both battery rows 11 of a battery pack.

[0048] like Figure 10 As shown, the second heat exchange plate 40 is provided with a first flow channel 41 extending along the second direction b, and the first heat exchange plate 30 and / or the third heat exchange plate 50 is provided with a second flow channel 51 extending along the second direction b. By introducing a heat exchange medium into the first flow channel 41 and the second flow channel 51, the heat exchange structure can exchange heat with the battery pack 11 and the busbar 20. In specific implementations, the second flow channel 51 can be provided on both the first heat exchange plate 30 and the third heat exchange plate 50, or the second flow channel 51 can be provided on only one of the first heat exchange plate 30 and the third heat exchange plate 50.

[0049] like Figure 1As shown, the battery pack also includes an inlet pipe 61 and an outlet pipe 62 disposed at one end of the battery array 10. The inlet pipe 61 is used to introduce heat exchange medium into the first flow channel 41 and the second flow channel 51, and the outlet pipe 62 is used to discharge the heat exchange medium that has completed heat exchange in the first flow channel 41 and the second flow channel 51.

[0050] Figures 2 to 4 The diagram shows a schematic representation of an embodiment of connecting a busbar 20 to terminals 122 according to this application. Specifically, the busbar 20 includes a first conductive piece 21, a second conductive piece 22, and a third conductive piece 23. The first conductive piece 21 is conductively connected between the terminals 122 of two adjacent batteries 12 arranged along the second direction b. The second conductive piece 22 is conductively connected between the terminals 122 of two batteries 12 located at the ends of the battery pack 100. The third conductive piece 23 is conductively connected between the terminals 122 of two adjacent batteries 12 in two battery packs 100. This arrangement allows multiple batteries 12 in the battery array 10 to be connected in series. The two first conductive pieces 21 arranged adjacently in the first direction a are staggered in the second direction b, thereby making fuller use of the heat exchange surface of the first heat exchange plate 30 and improving heat dissipation efficiency.

[0051] Figures 11 to 12 The diagram shows a schematic representation of an embodiment of connecting a busbar 20 to a terminal post 122 according to this application. Specifically, the busbar 20 includes a fourth conductive piece 24, a fifth conductive piece 25, and a sixth conductive piece 26. The fourth conductive piece 24 is conductively connected between the terminals 122 of two batteries 12 adjacently arranged in the first direction a in the battery pack 100. The fifth conductive piece 25 is conductively connected between the terminals 122 of two batteries 12 adjacently arranged in the first direction a in the two adjacent battery packs 100. The sixth conductive piece 26 is conductively connected between the terminals 122 of two batteries 12 adjacently arranged in the second direction b. The above configuration allows multiple batteries 12 in the battery array 10 to be connected in series. Since the corresponding two batteries 12 in each of two adjacent battery rows 11 are staggered in the second direction b, the terminals 122 on these two batteries 12 are also staggered. Therefore, the dimensions of the fourth conductive piece 24 and the fifth conductive piece 25 in the second direction b will be larger, thereby increasing the heat exchange area between the fourth conductive piece 24 and the fifth conductive piece 25 and the first heat exchange plate 30, and improving the heat dissipation efficiency.

[0052] This application also provides an electrical device, an embodiment of which includes a battery pack, the battery pack being the one described above. The battery pack described above effectively solves the problem of overheating of the terminals and busbars in related technologies, which easily leads to thermal runaway. The electrical device having the battery pack described above also has the aforementioned advantages.

[0053] In the description of this utility model, it should be understood that "multiple" means two or more. Directional terms such as "front, back, up, down, left, right," "horizontal, vertical, perpendicular, horizontal," and "top, bottom" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are used solely for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the outline of each component itself.

[0054] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0055] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0056] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery pack, characterized by, include: A battery array (10) includes a plurality of battery rows (11) arranged along a first direction (a), each battery row (11) including a plurality of batteries (12) arranged along a second direction (b), wherein the first direction (a) and the second direction (b) are intersecting, and two corresponding batteries (12) in two adjacent battery rows (11) are staggered in the second direction (b), and each battery (12) includes a battery body (121) and an electrode post (122) disposed on a first sidewall (1211) of the battery body (121); Busbar (20) is connected between the terminals (122) of two adjacent batteries (12); The first heat exchange plate (30) extends along the first direction (a) or the second direction (b) and is correspondingly disposed with the first sidewall (1211), and the busbar (20) is thermally connected with the first heat exchange plate (30).

2. The battery pack of claim 1, wherein, The first heat exchange plate (30) is located between the first sidewall (1211) and the busbar (20), and is thermally connected to both the first sidewall (1211) and the busbar (20).

3. The battery pack of claim 1, wherein, Two corresponding batteries (12) in two battery packs (11) located on both sides of any one of the battery packs (11) are arranged facing each other in the second direction (b). Two corresponding batteries (12) in two adjacent battery packs (11) have a misalignment distance d1 in the second direction (b). The misalignment distance d1 satisfies: 0.5mm≤d1≤20mm.

4. The battery pack of any one of claims 1-3, wherein, Two battery packs (11) arranged adjacent to each other along the first direction (a) form a battery pack (100), and the first heat exchange plate (30) extends along the second direction (b) and is arranged corresponding to both battery packs (11) in a battery pack (100).

5. The battery pack of claim 4, wherein, The first heat exchange plate (30) is provided with a clearance notch (31) for avoiding the pole (122).

6. The battery pack according to claim 5, characterized in that, The sidewall of the clearance notch (31) is spaced apart from the sidewall of the pole post (122); or, The sidewall of the clearance notch (31) and the sidewall of the pole post (122) have a gap distance d2, which satisfies: 0.5mm≤d2≤15mm.

7. The battery pack of claim 4, wherein, In the extending direction of the first heat exchange plate (30), the width of the first heat exchange plate (30) remains unchanged, and the first heat exchange plate (30) is spaced apart from all the terminals (122) in the battery pack (100).

8. The battery pack of claim 4, wherein, The battery pack also includes a second heat exchange plate (40) connected to the first heat exchange plate (30). The second heat exchange plate (40) is located between the two battery bars (11) in the battery pack (100) and is thermally connected to both battery bars (11).

9. The battery pack of claim 8, wherein, The battery pack also includes a third heat exchange plate (50) connected to the second heat exchange plate (40). The third heat exchange plate (50) is correspondingly disposed and thermally connected to the second sidewall of the battery (12). The second sidewall and the first sidewall (1211) are two sidewalls of the battery (12) disposed opposite to each other.

10. The battery pack of claim 9, wherein, The second heat exchange plate (40) is provided with a first flow channel (41) extending along the second direction (b), and the first heat exchange plate (30) and / or the third heat exchange plate (50) are provided with a second flow channel (51) extending along the second direction (b).

11. The battery pack of claim 4, wherein, The busbar (20) includes a first conductive piece (21), a second conductive piece (22), and a third conductive piece (23). The first conductive piece (21) is conductively connected between the terminals (122) of two adjacent batteries (12) arranged along the second direction (b). The second conductive piece (22) is conductively connected between the terminals (122) of two batteries (12) located at the ends of the battery pack (100). The third conductive piece (23) is conductively connected between the terminals (122) of two batteries (12) in two adjacent battery packs (100).

12. The battery pack of claim 4, wherein, The busbar (20) includes a fourth conductive piece (24), a fifth conductive piece (25), and a sixth conductive piece (26). The fourth conductive piece (24) is conductively connected between the terminals (122) of two batteries (12) arranged adjacent to each other in the first direction (a) in the battery pack (100). The fifth conductive piece (25) is conductively connected between the terminals (122) of two batteries (12) arranged adjacent to each other in the first direction (a) in the two adjacent battery packs (100). The sixth conductive piece (26) is conductively connected between the terminals (122) of two batteries (12) arranged adjacent to each other in the second direction (b).

13. An electrical device comprising a battery pack, characterized by The battery pack is the battery pack according to any one of claims 1 to 12.

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