Battery pack and electric equipment

Abstract

The utility model discloses a battery pack and electric equipment, and belongs to the technical field of batteries, the battery pack comprises a plurality of batteries, each battery comprises a body and a pole, and at least part of adjacent bodies are connected; each bus piece comprises a first connecting part, a second connecting part and a third connecting part, the first connecting part is connected with the pole of one battery, and the third connecting part is connected with the pole of the other battery; the confluence piece is provided with a notch, the notch is located between the first connecting part and the third connecting part, and at least part of the notch is located between the two poles; the fourth connecting part is connected with the first connecting part and is in heat-conducting connection with the body; and / or the confluence piece further comprises a fifth connecting part which is connected with the third connecting part and is connected with the body in a heat conduction manner. The deformation capacity of the whole bus piece is improved, so that the bus piece adapts to expansion displacement of the body, the counter-acting force on the pole is reduced, the heat dissipation effect of the body is further improved, and protection on the battery is improved.

Description

Technical Field

[0001] This application belongs to the field of battery technology, specifically relating to a battery pack and electrical equipment. Background Technology

[0002] Battery expansion is inevitable during charging and discharging. In a battery pack with multiple batteries closely arranged, adjacent batteries are prone to displacement due to mutual expansion. At this time, the busbar connecting the terminals of adjacent batteries will be subjected to tensile force and will react on the battery terminals, thus causing damage to the battery structure.

[0003] In addition, the battery terminals and the sides where the terminals are located will generate a lot of heat during the charging and discharging process. The busbar, as a conductive component that connects the terminals, can also conduct heat from the terminals. Due to the limitations of the internal space of the battery pack, it is difficult to set up other heat dissipation structures to provide heat dissipation for the sides where the battery terminals are located. Utility Model Content

[0004] The purpose of this utility model is to provide a battery pack to solve the above-mentioned technical problems; another purpose of this application is to provide an electrical device that uses the above-mentioned battery pack.

[0005] Technical solution: A battery pack according to an embodiment of this application, the battery pack having intersecting first and second directions, the battery pack comprising:

[0006] Multiple batteries are arranged along the first direction. Each battery includes a body and an electrode post disposed on the body. In the first direction, the bodies of at least some adjacent batteries are interconnected.

[0007] A plurality of busbars, each busbar including a first connecting portion, a second connecting portion, and a third connecting portion connected together, the first connecting portion, the second connecting portion, and the third connecting portion being arranged along a first direction, the first connecting portion being connected to a terminal of one battery, and the third connecting portion being connected to a terminal of another battery, thereby electrically connecting the connected batteries; the busbar has a notch located between the first connecting portion and the third connecting portion, the notch and the second connecting portion being arranged along a second direction, and in the first direction, at least a portion of the notch being located between two terminals;

[0008] The busbar further includes a fourth connecting portion, which connects to the first connecting portion. The fourth connecting portion is positioned on the side of the first connecting portion facing the body in the third direction. The fourth connecting portion and the electrode connecting the first connecting portion are arranged in the second direction, and the fourth connecting portion is thermally connected to the body; and / or,

[0009] The manifold further includes a fifth connecting part, which connects to the third connecting part. The fifth connecting part is located on the side of the third connecting part facing the body in the third direction. The fifth connecting part and the pole connecting the third connecting part are arranged in the second direction, and the fifth connecting part is thermally connected to the body.

[0010] In some embodiments, the first connecting portion includes a first sub-portion and a second sub-portion connected to each other, the first sub-portion and the second sub-portion being arranged along the second direction, and the second sub-portion being connected to the pole post in the third direction.

[0011] The third connecting part includes a third sub-part and a fourth sub-part connected to each other. The third sub-part and the fourth sub-part are arranged along the second direction, and the fourth sub-part is connected to the pole post in the third direction.

[0012] The second connecting portion connects the first sub-part and the third sub-part, and the notch is formed between the second sub-part and the fourth sub-part.

[0013] In some embodiments, in a plane perpendicular to the third direction, the orthographic projection of the pole coincides with the orthographic projection of the connected second sub-part;

[0014] And / or, in a plane perpendicular to the third direction, the orthographic projection of the pole coincides with the orthographic projection of the connected fourth sub-part.

[0015] In some embodiments, the second connecting portion has a groove between the first connecting portion and the third connecting portion.

[0016] In some embodiments, the second connecting portion includes a main body sub-part, a first transition sub-part, and a second transition sub-part. The first transition sub-part is connected to the main body sub-part and the first connecting portion, and the second transition sub-part is connected to the main body sub-part and the second connecting portion. The main body sub-part, the first transition sub-part, and the second transition sub-part form the groove.

[0017] In a plane perpendicular to the first direction, the orthographic projection of the main body sub-part is at least partially spaced from the orthographic projection of the first connecting part in the third direction.

[0018] In some embodiments, the groove is located on the side of the second connecting portion opposite to the body;

[0019] The battery pack also includes a collection component, which includes a collection body extending along a first direction and a plurality of wiring portions connected to the collection body. Each wiring portion corresponds to a second connection portion, and at least a portion of the wiring portion is embedded in the groove and connected to the second connection portion.

[0020] In some embodiments, the battery pack further includes an isolator, a portion of which is spaced between the body and the busbar, the busbar having a positioning hole, and the isolator having a positioning post that passes through the positioning hole.

[0021] In some embodiments, the manifold is further provided with a recessed groove on the side opposite to the main body, the recessed groove surrounding and communicating with the positioning hole.

[0022] In some embodiments, the battery pack further includes a liquid cooler, the liquid cooler and the busbar are disposed in the third-party direction, and the busbar is thermally connected to the liquid cooler.

[0023] Accordingly, the electrical device described in this application includes the aforementioned battery pack.

[0024] Beneficial effects: A battery pack according to an embodiment of this application includes multiple batteries and multiple busbars. The multiple batteries are arranged along a first direction. Each battery includes a body and a terminal post disposed on the body. In the first direction, at least some of the bodies of adjacent batteries are interconnected. The busbar includes a first connecting portion, a second connecting portion, and a third connecting portion connected together. The first connecting portion, the second connecting portion, and the third connecting portion are arranged along a first direction. The first connecting portion is connected to a terminal of one battery, and the third connecting portion is connected to a terminal of another battery to electrically connect the connected batteries. The busbar has a notch located between the first connecting portion and the third connecting portion. The notch and the second connecting portion are arranged along a second direction, and at least a portion of the notch is located between the two terminals in the first direction. The busbar also includes a fourth connecting portion connected to the first connecting portion. The fourth connecting portion is disposed on the side of the first connecting portion facing the body in a third direction. The fourth connecting portion and the terminal connected to the first connecting portion are arranged in the second direction. The fourth connecting portion is thermally connected to the body. And / or, the busbar also includes a fifth connecting portion connected to the third connecting portion. The fifth connecting portion is disposed on the side of the third connecting portion facing the body in a third direction. The fifth connecting portion and the terminal connected to the third connecting portion are arranged in the second direction. The fifth connecting portion is thermally connected to the body. When the bodies of multiple batteries expand during charging and discharging, the two terminals connected to the same busbar simultaneously pull on the corresponding first and third connecting parts. The first and third connecting parts are connected through the second connecting part. At least a portion of the notch faces the pulling force of the two terminals, improving the overall deformation capacity of the busbar. That is, the portions of the first and third connecting parts corresponding to the notches are more likely to move and deform in opposite directions to adapt to the expansion displacement of the body, thereby reducing the reaction force on the terminals and improving the protection of the batteries. At the same time, since the terminals themselves have a height that protrudes from the body in a third direction, a fourth connecting part can be additionally provided between the first connecting part and the body, and a fifth connecting part can be additionally provided between the third connecting part and the body. The body is thermally connected through the fourth and / or fifth connecting parts, which helps to further improve the heat dissipation effect of the body without reducing the deformation capacity of the second connecting part. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the battery pack structure according to an embodiment of this application;

[0027] Figure 2 This is a schematic diagram of the structure of the battery, busbar, and data acquisition device in an embodiment of this application;

[0028] Figure 3 This is an exploded structural diagram of the battery, busbar, and data acquisition device according to an embodiment of this application;

[0029] Figure 4 This is a partial cross-sectional structural schematic diagram of the battery, busbar, and data acquisition device according to an embodiment of this application;

[0030] Figure 5 This is a schematic diagram of the structure of the bus component according to an embodiment of this application;

[0031] Figure 6 This is a schematic diagram of the bus configuration from another perspective in an embodiment of this application;

[0032] Figure 7 This is a schematic diagram of the structure of a bus component according to another embodiment of this application;

[0033] Reference numerals: 1. Battery; 10. Body; 11. Terminal; 2. Busbar; 20. First connecting part; 200. First sub-part; 201. Second sub-part; 21. Second connecting part; 210. Main body sub-part; 211. First transition sub-part; 212. Second transition sub-part; 22. Third connecting part; 220. Third sub-part; 221. Fourth sub-part; 23. Notch; 24. Groove; 25. Fourth connecting part; 26. Fifth connecting part; 27. Positioning hole; 270. Slot; 28. Welding hole; 29. ​​Anti-fooling opening; 3. Acquisition component; 30. Acquisition body; 31. Wiring part; 4. Isolation component; 40. Positioning post; 5. Liquid cooling component; 6. Housing; 60. Receiving cavity; 61. Housing cover; X, First direction; Y, Second direction; Z, Third direction. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0035] In the description of this application, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and 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 a limitation on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, and "at least one" can mean one, two, or more, unless otherwise explicitly specified.

[0036] Currently, batteries inevitably experience irreversible expansion after multiple cycles, and this same "breathing" expansion also occurs during charging. Within a battery pack with multiple closely packed cells, the mutual expansion of adjacent cells can easily cause displacement. This tension in the busbar connecting the adjacent battery terminals can then act on the battery terminals, leading to structural damage. Furthermore, the battery terminals and their surrounding surfaces generate significant heat during charging and discharging. The busbar, as a conductive component connecting the terminals, also conducts this heat. However, due to the limited space within the battery pack, it is difficult to incorporate other heat dissipation structures for the sides of the battery terminals.

[0037] In view of this, refer to Figures 1 to 7 This application provides a battery pack designed to overcome at least one of the aforementioned technical problems.

[0038] It should be noted that the following embodiments introduce a first direction X, a second direction Y, and a third direction Z that intersect each other. Specifically, the first direction X is approximately parallel to the length direction of the battery pack as a whole, the second direction Y is approximately parallel to the width direction of the battery pack as a whole, and the third direction Z is approximately parallel to the height direction of the battery pack as a whole.

[0039] Reference Figures 1 to 7 A battery pack includes a housing 6, a housing cover 61, multiple batteries 1, and multiple busbars 2.

[0040] The housing 6 has a receiving cavity 60, in which multiple batteries 1 are arranged along a first direction X, and a cover 61 is used to seal the receiving cavity 60. Each battery 1 includes a body 10 and terminals 11 disposed on the body 10. In this embodiment, the first direction X is also approximately parallel to the thickness direction of the body 10, the second direction Y is approximately parallel to the width direction of the body 10, and the third direction Z is approximately parallel to the height direction of the body 10. At least some adjacent battery bodies 10 are interconnected along the first direction X. The busbar 2 includes a first connecting portion 20, a second connecting portion 21, and a third connecting portion 22 connected together. The first connecting portion 20, the second connecting portion 21, and the third connecting portion 22 are arranged along the first direction X. The first connecting portion 20 connects to the terminal 11 of one battery 1, and the third connecting portion 22 connects to the terminal 11 of another battery 1, thus electrically connecting the connected batteries 1. The busbar 2 has a notch 23 located between the first connecting part 20 and the third connecting part 22. The notch 23 and the second connecting part 21 are arranged along the second direction Y, and at least a portion of the notch 23 is located between the two pole posts 11 in the first direction X.

[0041] The busbar 2 further includes a fourth connecting portion 25, which is connected to the first connecting portion 20. The fourth connecting portion 25 is disposed on the side of the first connecting portion 20 facing the body 10 in the third direction Z. The fourth connecting portion 25 and the pole post 11 connected to the first connecting portion 20 are arranged in the second direction Y. The fourth connecting portion 25 is thermally connected to the body 10. And / or, the busbar 2 further includes a fifth connecting portion 26, which is connected to the third connecting portion 22. The fifth connecting portion 26 is disposed on the side of the third connecting portion 22 facing the body 10 in the third direction Z. The fifth connecting portion 26 and the pole post 11 connected to the third connecting portion 22 are arranged in the second direction Y. The fifth connecting portion 26 is thermally connected to the body 10.

[0042] It should be noted that electrical connections include parallel and series connections, where reference... Figure 2 In this embodiment, the multiple batteries 1 are connected in series along the first direction X via multiple busbars 2. That is, the first connecting part 20 and the third connecting part 22 of each busbar 2 correspond one-to-one with the terminal posts 11 of different polarities of adjacent batteries 1. It is understood that in other embodiments, multiple batteries 1 can also be connected in parallel via busbars 2 according to design needs, which will not be elaborated here.

[0043] When the body 10 of multiple batteries 1 expands during charging and discharging, the two pole posts 11 connected to the same busbar 2 simultaneously pull on the corresponding first connecting part 20 and third connecting part 22. The first connecting part 20 and the third connecting part 22 are connected through the second connecting part 21. At least a portion of the notch 23 is directly opposite to the pulling force of the two pole posts 11, which improves the overall deformation capability of the busbar 2. That is, the portions of the first connecting part 20 and the third connecting part 22 corresponding to the notch 23 are more likely to move and deform in opposite directions to adapt to the expansion displacement of the body 10, thereby reducing the reaction force on the pole posts 11 and improving the protection of the battery 1.

[0044] Meanwhile, since the pole post 11 itself has a height that protrudes from the body 10 along the third direction Z, a fourth connecting part 25 can be additionally provided between the first connecting part 20 and the body 10, and a fifth connecting part 26 can be additionally provided between the third connecting part 22 and the body 10. The body 10 is thermally connected through the fourth connecting part 25 and / or the fifth connecting part 26, which helps to further improve the heat dissipation effect of the body 10 without reducing the deformation capability of the second connecting part 21.

[0045] It is understood that this embodiment refers to Figures 3 to 7 A fourth connecting portion 25 is provided between the first connecting portion 20 and the body 10, and a fifth connecting portion 26 is provided between the third connecting portion 22 and the body 10. In other embodiments, only the fourth connecting portion 25 or only the fifth connecting portion 26 may be provided, which will not be described in detail here.

[0046] In some embodiments, refer to Figures 3 to 6 The first connecting portion 20 includes a first sub-portion 200 and a second sub-portion 201 connected together, the first sub-portion 200 and the second sub-portion 201 arranged along the second direction Y. A fourth connecting portion 25 connects to the first sub-portion 200, and the second sub-portion 201 is connected to the pole post 11 in the third direction Z. The third connecting portion 22 includes a third sub-portion 220 and a fourth sub-portion 221 connected together, the third sub-portion 220 and the fourth sub-portion 221 arranged along the second direction Y. A fifth connecting portion 26 connects to the third sub-portion 220, and the fourth sub-portion 221 is connected to the pole post 11 in the third direction Z. The second connecting portion 21 connects the first sub-portion 200 and the third sub-portion 220, and a notch 23 is formed between the second sub-portion 201 and the fourth sub-portion 221.

[0047] The busbar 2 and the two adjacent bodies 10 are arranged along the third direction Z. The first sub-part 200, the second connecting part 21, and the third sub-part 220 are arranged in the first direction X. Correspondingly, the second sub-part 201, the notch 23, and the fourth sub-part 221 are arranged in the first direction X. At this time, the pole post 11 connecting the second sub-part 201 and the fourth sub-part 221 are all misaligned with the second connecting part 21 in the second direction Y. This helps to reduce the pulling force of the pole post 11 directly acting on the second connecting part 21 in the second direction Y when the body 10 expands. This allows the two pole posts 11 to concentrate their force on pulling the second sub-part 201 and the fourth sub-part 221 in opposite directions, thereby making full use of the deformation capacity of the second sub-part 201 and the fourth sub-part 221 and reducing damage to the battery 1.

[0048] In some embodiments, refer to Figures 2 to 6 In a plane perpendicular to the third direction Z, the orthographic projection of the pole post 11 coincides with the orthographic projection of the connected second sub-part 201.

[0049] In some embodiments, refer to Figures 2 to 6 In a plane perpendicular to the third direction Z, the orthographic projection of the pole post 11 coincides with the orthographic projection of the connected fourth sub-part 221.

[0050] Specifically, in this embodiment, in a plane perpendicular to the third direction Z, the orthographic projection of the pole post 11 is completely within the orthographic projection of the second sub-part 201, thereby ensuring a full connection between the pole post 11 and the second sub-part 201 and improving the stability of the electrical connection structure between the pole post 11 and the busbar 2. It should be noted that the second sub-part 201 is provided with a welding hole 28 extending along the third direction Z to facilitate welding the second sub-part 201 and the corresponding pole post 11.

[0051] In other embodiments, the shape and size of the orthographic projection of the pole post 11 in a plane perpendicular to the third direction Z can also be the same as the shape and size of the orthographic projection of the connected second sub-part 201, which will not be described in detail here.

[0052] Meanwhile, in this embodiment, in the plane perpendicular to the third direction Z, the orthographic projection of the pole post 11 lies entirely within the orthographic projection of the connected fourth sub-part 221, thereby ensuring a full connection between the pole post 11 and the fourth sub-part 221 and improving the stability of the electrical connection structure between the pole post 11 and the busbar 2. It should be noted that the fourth sub-part 221 may also have a through-hole 28 along the third direction Z to facilitate welding the fourth sub-part 221 and the corresponding pole post 11.

[0053] In other embodiments, the shape and size of the orthographic projection of the pole post 11 in a plane perpendicular to the third direction Z can also be the same as the shape and size of the orthographic projection of the connected fourth sub-part 221, which will not be described in detail here.

[0054] In other embodiments, it may also be sufficient that the orthographic projection of the pole post 11 coincides with the orthographic projection of the connected second sub-part 201 or the orthographic projection of the pole post 11 coincides with the orthographic projection of the connected fourth sub-part 221 in a plane perpendicular to the third direction Z, which will not be elaborated here.

[0055] In some embodiments, refer to Figures 3 to 6 The second connecting part 21 has a groove 24 between the first connecting part 20 and the third connecting part 22. It can be understood that during the expansion of the body 10, the tensile force of the pole post 11 on the first connecting part 20 and the third connecting part 22 is directly applied to the second connecting part 21. The groove 24 provided at the second connecting part 21, such as by surface cutting or stamping, helps to change the stress distribution of the second connecting part 21, improve the overall flexibility, thereby improving the deformation capacity of the second connecting part 21 and reducing the risk of damage caused by the pole post 11 being pulled back under the tensile force of the pole post 11.

[0056] In some embodiments, refer to Figures 3 to 6 The second connecting portion 21 includes a main body sub-portion 210, a first transition sub-portion 211, and a second transition sub-portion 212. The first transition sub-portion 211 connects the main body sub-portion 210 and the first connecting portion 20, respectively. The second transition sub-portion 212 connects the main body sub-portion 210 and the second connecting portion 21, respectively. The main body sub-portion 210, the first transition sub-portion 211, and the second transition sub-portion 212 form a groove 24. In a plane perpendicular to the first direction X, the orthographic projection of the main body sub-portion 210 is at least partially spaced from the orthographic projection of the first connecting portion 20 in the third direction Z.

[0057] It is understood that in this embodiment, the second connecting part 21, the first connecting part 20, and the third connecting part 22 can be integrally formed, such as by stamping to form the main body sub-part 210, the first transition sub-part 211, and the second transition sub-part 212. In this case, after the groove 24 is formed by stamping, at least a portion of the main body sub-part 210 is misaligned with the first connecting part 20 in the third direction Z. When the body 10 expands, the amount of misalignment deformation between the main body sub-part 210 and the first connecting part 20 and the second connecting part 21 can absorb the expansion force, thereby improving the deformation capacity of the overall busbar 2.

[0058] In some embodiments, refer to Figure 2 and Figure 3 The groove 24 is located on the side of the second connecting part 21 opposite to the main body 10. The battery pack also includes a data acquisition element 3, which can be a flexible circuit board structure. The data acquisition element 3 can be configured to collect information such as voltage and temperature of each battery 1. Its data acquisition principle is existing technology and will not be described in detail here.

[0059] The acquisition component 3 includes an acquisition body 30 extending along a first direction X and a plurality of wiring portions 31 connecting the acquisition body 30. Each wiring portion 31 corresponds to a second connection portion 21. At least a portion of the wiring portion 31 is embedded in a groove 24 and connected to the second connection portion 21.

[0060] Specifically, in this embodiment, each wiring portion 31 is completely housed within its corresponding groove 24 to improve the electrical connection stability between the acquisition element 3 and the bus 2. The acquisition element 3 and each body 10 are also distributed in the third direction Z. When the groove 24 is positioned on the side of the second connection portion 21 away from the body 10, the wiring portion 31 can be supported by the corresponding second connection portion 21, thereby improving the connection stability between the second connection portion 21 and the wiring portion 31.

[0061] Meanwhile, the second connecting part 21 is recessed towards the body 10 to form a groove 24, thereby providing accommodating space for the wiring part 31 in the third direction Z. Compared with the structure without the groove 24, the space occupied by the wiring part 31 in the third direction Z is reduced, which is conducive to optimizing the space utilization in the battery pack.

[0062] In some embodiments, refer to Figures 2 to 4 The width of the second connecting portion 21 in the first direction X can gradually decrease from the side near the wiring portion 31 to the side away from the wiring portion 31. Correspondingly, the width of the formed groove 24 in the first direction X gradually decreases from the side near the wiring portion 31 to the side away from the wiring portion 31.

[0063] In this embodiment, as Figure 4 As shown, the width of the second connecting portion 21 in the first direction X can be divided into three segments that decrease sequentially in the second direction Y. On the one hand, the width of the side of the groove 24 near the wiring portion 31 in the first direction X is sufficient to completely and stably accommodate the corresponding wiring portion 31 and provide a certain amount of error adjustment in the first direction X. On the other hand, the width of the side of the groove 24 away from the wiring portion 31 in the first direction X is smaller than that of the side near the wiring portion 31, so as to avoid the two connected pole posts 11. This helps to simplify the size of the busbar 2, reduce the weight of the busbar 2, thereby improving the space utilization of the battery pack and reducing the overall weight of the battery pack.

[0064] In addition, in other embodiments, the width of the groove 24 in the first direction X can also be set to decrease as a whole in the second direction Y without segmentation, etc., which will not be elaborated here.

[0065] It should be noted that, in some embodiments, reference is made to... Figures 4 to 6 The fourth connecting part 25 can be integrally formed with the first connecting part 20 and overlapped with the first connecting part 20 by bending. The fifth connecting part 26 can be integrally formed with the third connecting part 22 and overlapped with the third connecting part 22 by bending.

[0066] In some embodiments, refer to Figure 7 The fourth connecting part 25 can also be separately welded and stacked with the first connecting part 20. Similarly, the fifth connecting part 26 can also be separately welded and stacked with the third connecting part 22.

[0067] In some embodiments, refer to Figure 4 and Figure 5 The first connecting part 20 and the third connecting part 22 are respectively provided with anti-fooling openings 29 at opposite ends in the first direction X. The anti-fooling openings 29 can provide visual anti-fooling. During the process of assembling the battery pack or manufacturing the busbar 2, the anti-fooling openings 29 facilitate quick positioning and assembly of the busbar 2, thereby improving the efficiency of assembly and manufacturing.

[0068] In some embodiments, refer to Figures 2 to 4 The battery pack also includes a separator 4, a portion of which is spaced between the main body 10 and the busbar 2. The busbar 2 has a positioning hole 27, and the separator 4 has a positioning post 40 that passes through the positioning hole 27. The separator 4 can be filled between the main body 10 and the busbar 2 using an insulating hot-melt material, thereby improving the insulation spacing stability between the busbar 2 and the main body 10. Due to the presence of the positioning hole 27, the positioning post 40 can be formed during the molding of the separator 4, thereby positioning the busbar 2 and improving the stability of the busbar 2's placement. Due to the provision of the fourth connecting portion 25 and the fifth connecting portion 26, the thickness of the separator 4 in the third direction Z, directly opposite the first connecting portion 20 and the third connecting portion 22, is reduced, which facilitates the rapid transfer of heat from the main body 10 to the fourth connecting portion 25 and the fifth connecting portion 26, improving the heat dissipation effect of the main body 10.

[0069] In some embodiments, refer to Figure 4 The manifold 2 is also provided with a recess 270 on the side opposite to the main body 10. The recess 270 surrounds and connects to the positioning hole 27. By reserving the recess 270 structure on the manifold 2, when the positioning post 40 is formed by hot melting, the recess 270 can accommodate the hot melt material of the positioning post 40, reducing the height of the positioning post 40 protruding from the manifold 2 in the third direction Z, thereby reducing space occupation and avoiding interference with the installation of other structural components.

[0070] In some embodiments, refer to Figure 1 The battery pack also includes a liquid cooler 5, which and a busbar 2 are disposed on a third direction Z, and the busbar 2 is thermally connected to the liquid cooler 5.

[0071] In this embodiment, two rows of busbars 2 are arranged in the second direction Y, and each row of busbars 2 is arranged along the first direction X. Correspondingly, two liquid cooling components 5 are also provided and extend along the first direction X respectively. The two liquid cooling components 5 correspond one-to-one with the two rows of busbars 2. The liquid cooling components 5 are stacked and thermally connected to the corresponding row of busbars 2 in the third direction Z, which is beneficial for conducting the heat generated by the charging and discharging of the terminal post 11 through the busbars 2, thereby improving the heat dissipation and cooling effect of the battery pack.

[0072] Accordingly, this application provides an electrical device that includes the aforementioned battery pack. This electrical device can be an electronic device, a storage device, or a vehicle, etc. It is understood that this electrical device can possess all the technical features and corresponding beneficial effects of the aforementioned battery pack, which will not be elaborated further here.

[0073] The battery pack and electrical device provided in the embodiments of this application have been described in detail above, and specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery pack, characterized in that, The battery pack has a first direction, a second direction, and a third direction that intersect each other in pairs, and the battery pack includes: Multiple batteries are arranged along the first direction. Each battery includes a body and an electrode post disposed on the body. In the first direction, the bodies of at least some adjacent batteries are interconnected. A plurality of busbars, each busbar including a first connecting portion, a second connecting portion, and a third connecting portion, the first connecting portion, the second connecting portion, and the third connecting portion are arranged along a first direction, and the second connecting portion is respectively connected to the first connecting portion and the third connecting portion. The first connecting portion is connected to a terminal of one battery, and the third connecting portion is connected to a terminal of another battery, thereby electrically connecting the connected batteries. The first connecting portion, the second connecting portion, and the third connecting portion form a notch, the notch being located between the first connecting portion and the third connecting portion. The notch and the second connecting portion are arranged along a second direction, and in the first direction, at least a portion of the notch is located between two terminals. The busbar further includes a fourth connecting portion, which connects to the first connecting portion. The fourth connecting portion is positioned on the side of the first connecting portion facing the body in the third direction. The fourth connecting portion and the electrode connecting the first connecting portion are arranged in the second direction, and the fourth connecting portion is thermally connected to the body; and / or, The manifold further includes a fifth connecting part, which connects to the third connecting part. The fifth connecting part is located on the side of the third connecting part facing the body in the third direction. The fifth connecting part and the pole connecting the third connecting part are arranged in the second direction, and the fifth connecting part is thermally connected to the body.

2. The battery pack according to claim 1, characterized in that, The first connecting portion includes a first sub-portion and a second sub-portion connected to each other, the first sub-portion and the second sub-portion are arranged along the second direction, and the second sub-portion is connected to the pole post in the third direction; The third connecting part includes a third sub-part and a fourth sub-part connected to each other. The third sub-part and the fourth sub-part are arranged along the second direction, and the fourth sub-part is connected to the pole post in the third direction. The second connecting portion connects the first sub-part and the third sub-part, and the notch is formed between the second sub-part and the fourth sub-part.

3. The battery pack according to claim 2, characterized in that, In a plane perpendicular to the third direction, the orthographic projection of the pole coincides with the orthographic projection of the connected second sub-part; And / or, in a plane perpendicular to the third direction, the orthographic projection of the pole coincides with the orthographic projection of the connected fourth sub-part.

4. The battery pack according to claim 1, characterized in that, The second connecting part has a groove between the first connecting part and the third connecting part.

5. The battery pack according to claim 4, characterized in that, The second connecting portion includes a main body sub-part, a first transition sub-part, and a second transition sub-part. The first transition sub-part connects the main body sub-part and the first connecting portion, and the second transition sub-part connects the main body sub-part and the second connecting portion. The main body sub-part, the first transition sub-part, and the second transition sub-part form the groove. In a plane perpendicular to the first direction, the orthographic projection of the main body sub-part is at least partially spaced from the orthographic projection of the first connecting part in the third direction.

6. The battery pack according to claim 4 or 5, characterized in that, The groove is located on the side of the second connecting portion away from the main body; The battery pack also includes a collection component, which includes a collection body extending along a first direction and a plurality of wiring portions connected to the collection body. Each wiring portion corresponds to a second connection portion, and at least a portion of the wiring portion is embedded in the groove and connected to the second connection portion.

7. The battery pack according to claim 1, characterized in that, The battery pack also includes an isolator, a portion of which is spaced between the main body and the busbar. The busbar has a positioning hole, and the isolator has a positioning post that passes through the positioning hole.

8. The battery pack according to claim 7, characterized in that, The manifold is also provided with a recessed groove on the side opposite to the main body, and the recessed groove surrounds and connects to the positioning hole.

9. The battery pack according to claim 1, characterized in that, The battery pack also includes a liquid cooling component, which and the busbar are disposed in the third direction, and the busbar is thermally connected to the liquid cooling component.

10. An electrical appliance, characterized in that, Includes the battery pack as described in any one of claims 1 to 9.

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