Battery pack and electric equipment comprising same

Abstract

The utility model relates to the technical field of batteries, and particularly provides a battery pack and electric equipment comprising the same. The battery pack comprises a box body and a battery cell group, and the battery cell group is positioned in the box body; the battery cell group comprises a plurality of battery cell columns and a plurality of side plates which are alternately arranged in the first direction, each side plate comprises a plate body and adhesive limiting strips, the adhesive limiting strips are arranged on the two opposite sides of the side face of the plate body in the third direction, and an adhesive area is formed between the adhesive limiting strips on the two sides; the battery cell column comprises a plurality of battery cells, each battery cell is provided with an insulating layer, each insulating layer is provided with a hollow area, and the adhesive areas correspond to the hollow areas. According to the battery pack, the glue limiting strips on the side plates can prevent the glue on the plate bodies from overflowing towards the two sides in the third direction to influence the assembly of other parts in the battery pack, so that the glue in the gluing areas can only flow in the second direction, and the side plates can be bonded with a plurality of battery cells; moreover, the battery cell is provided with the hollow area, so that glue can permeate conveniently, the bonding area of the battery cell and the side plate is increased, and the bonding effect is firmer.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and specifically proposes a battery pack and an electrical device including the same. Background Technology

[0002] With the popularization of new energy vehicles, the market has higher and higher requirements for battery performance, especially in terms of safety and service life. As a key component that protects the cells and provides connections between the cells and the outside, the design of the battery pack has a direct impact on the performance of the whole vehicle.

[0003] In related technologies, battery packs are formed by clamping multiple battery cells together with side plates. The process often involves applying adhesive to the central area of ​​the side plates, which then spreads outwards as the side plates are pressed against the sides of the battery cells. However, due to the uncontrollable nature of adhesive diffusion, some areas are often left uncovered, resulting in areas where the side plates and battery cell sides are not filled with adhesive, while other areas of the battery cell, such as the top and bottom ends, are covered by the adhesive layer. This affects subsequent production operations of the battery pack. Utility Model Content

[0004] The purpose of this application is to solve at least some of the technical problems mentioned above, and this purpose is achieved through the following technical solutions:

[0005] In a first aspect, this application proposes a battery pack having a first direction, a second direction, and a third direction intersecting each other. It includes a housing and a cell assembly. The housing includes a cover and a frame. The cover is connected to the end of the frame along the third direction, and the cover and frame enclose a cavity, within which the cell assembly is located. The cell assembly includes multiple cell rows and multiple side plates. Both the cell rows and side plates extend along the second direction. The multiple cell rows and side plates are alternately arranged along the first direction, and the cell rows and adjacent side plates are interconnected. Each side plate includes a plate body, a first sealing strip, and a second sealing strip. The plate body has a first surface facing an adjacent cell row. One side has a first limiting strip and a second limiting strip at opposite ends along a third direction. Both the first and second limiting strips extend along a second direction and protrude relative to the first side facing the cell array. The first side has an adhesive area located between the first and second limiting strips. The cell array includes multiple cells arranged along the second direction. Each cell has a first side facing the adjacent first side. The first side is covered with an insulating layer with a hollow area. The first side of the side plate is bonded to the first side of the cell. Both the first and second limiting strips abut against the first side, and the adhesive area and the hollow area correspond to each other along the first direction.

[0006] In some embodiments, along a third direction, the size H1 of the plate is less than or equal to the size H2 of the first side of the cell.

[0007] In some embodiments, the plate body further has a second side facing away from the first side along a first direction, and the second side is also provided with a first adhesive strip and a second adhesive strip; the first adhesive strips of the first side and the second side are arranged opposite to each other along the first direction, and the second adhesive strips of the first side and the second side are arranged opposite to each other along the first direction.

[0008] In some embodiments, the first surface and / or the second surface have a first edge and a second edge on both sides along a third direction, and / or the first limiting strip is flush with the first edge and the second limiting strip is flush with the second edge.

[0009] In some embodiments, the battery cell array further includes a separator, one end of the battery cell having a second side surface along a second direction, the separator being attached to the second side surface of the battery cell, and the separator being spaced apart from two adjacent side plates along a first direction.

[0010] In some embodiments, the partition is a nano-insulating pad or an MMP foam pad.

[0011] In some embodiments, the frame includes two side beams disposed opposite each other along a second direction, and in the second direction, there is a gap between the cell array and the two side beams.

[0012] In some embodiments, in the second direction, the side plate has protrusions at both ends of the cell array, and the protrusions are located within the gaps.

[0013] In some embodiments, the gap is filled with colloid, one end of the protruding portion along the second direction abuts against the corresponding side beam, and the end of the protruding portion facing the side beam is provided with a first notch and / or through hole, the first notch and / or through hole penetrating the side plate along the first direction, and the first notch and / or through hole is used for the colloid to pass through.

[0014] Secondly, this application proposes an electrical device that includes the battery pack of the first aspect.

[0015] The technical solution proposed in this application has at least the following technical effects:

[0016] In this application, the adhesive-limiting strip on the side plate can restrict the overflow of adhesive from the middle area of ​​the plate to the two sides in a third direction, thus preventing it from affecting the assembly of other components within the battery pack. This ensures that the adhesive in the bonding area can only flow in the second direction, achieving bonding between the side plate and the first side of multiple battery cells. Furthermore, the first side of the battery cell has a hollowed-out area to facilitate the penetration of adhesive in the bonding area, thereby increasing the bonding area between the battery cell and the side plate and making the bonding effect more robust. In addition, the thickness of the adhesive-limiting strip can also limit the coating thickness of the adhesive in the bonding area. Attached Figure Description

[0017] To better integrate the content illustrated in the accompanying drawings with the description of the specific embodiments, a brief introduction to the drawings is provided below. It is understood that the accompanying drawings mentioned below are merely schematic illustrations of some embodiments of the relevant technical solutions and the technical solutions of this application. Without creative effort, those skilled in the art can create drawings illustrating other embodiments.

[0018] Specifically, the annotations for the accompanying drawings are as follows:

[0019] Figure 1 This is a schematic diagram of the overall structure of the battery pack described in some embodiments of this application;

[0020] Figure 2 This is a schematic diagram of the overall structure of the battery pack described in some embodiments of this application;

[0021] Figure 3 This is a partial cross-sectional schematic diagram of the box body described in some embodiments of this application;

[0022] Figure 4 This is a partial structural schematic diagram of the battery cell array described in some embodiments of this application;

[0023] Figure 5 This is a partial structural schematic diagram of the first type of side plate described in some embodiments of this application;

[0024] Figure 6 This is a schematic diagram of the frame structure described in some embodiments of this application;

[0025] Figure 7 This is a partial structural diagram of the second type of side plate described in some embodiments of this application.

[0026] Specifically, the annotations for the figure marks in the instruction manual are as follows:

[0027] 100. Battery pack; 110. Housing; 120. Cell assembly; 130. Cover; 121. Cell array; 1211. Cell; 111. Frame; 1111. Side beam; 1112. Assembly part; 1113. Positioning part; 112. First cover; 113. Second cover; 114. Support plate; 1212. Side plate; 1213. Partition; X, First direction; Y, Second direction; Z, Third direction; K, Block Adhesive block; J1, first gap; J2, second gap; L, adhesive strip; B, board body; Q, adhesive area; M1, first surface; A1, first side surface; A2, second side surface; M2, second surface; L1, first adhesive strip; L2, second adhesive strip; P, hollow area; T, protruding part; H, first opening; C1, first notch; C2, second notch; R, through hole; C, U-shaped groove; b1, first edge; b2, second edge. Detailed Implementation

[0028] To make the embodiments of this application clearer, they will be described below in conjunction with the accompanying drawings. It is to be understood that the content mentioned below is only a partial embodiment of this application, while the complete list of all embodiments is provided. Therefore, other embodiments obtained based on the following embodiments without any inventive effort all fall within the protection scope of this application.

[0029] It should be understood that the terminology used herein is for the purpose of describing specific embodiments only and is not intended to impose strict limitations on the technical solutions unless the context clearly indicates otherwise. For example, the use of "a," "an," and "the" to modify a feature does not preclude the possibility that the feature may be plural in other embodiments.

[0030] It should be understood that the terms "comprising," "including," and "having" are open-ended, indicating the presence of the stated features but not excluding the possibility of other features in the embodiment. Similarly, the use of terms such as "first," "second," etc., to describe multiple features only indicates the distinction between one feature and another, and such terms do not imply order or sequence unless explicitly stated in the context.

[0031] It should be understood that, unless the context clearly indicates otherwise, the terms "setup," "connection," and "installation" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integrated connection; they can refer to a direct connection or an indirect connection via a medium. Those skilled in the art will understand the specific meaning of these terms in this document based on the specific circumstances.

[0032] In addition, for ease of description, the text will use terms of spatial relative relationship to describe the position of one feature relative to another feature, such as "inner", "outer", "end", "side", "upper", "middle", "lower", "high", "low", "axial", "circumferential", "radial", "horizontal", "vertical", "first direction", "second direction", etc. It can be understood that the spatial relative relationship between two features should include other specific situations besides those shown in the accompanying drawings of the specification.

[0033] The embodiments of this application will now be described with reference to the accompanying drawings.

[0034] Firstly, referring to Figures 1 to 5 Key reference Figure 5This application proposes a battery pack 100 having a first direction X, a second direction Y and a third direction Z that intersect each other, and optionally, the first direction X, the second direction Y and the third direction Z are perpendicular to each other. Specifically, the battery pack 100 includes a housing 110 and a cell assembly 120. The housing 110 includes a cover 130 and a frame 111, with the cover 130 and the frame 111 forming a cavity, and the cell assembly 120 located within the cavity. The cell assembly 120 includes multiple cell rows 121 and multiple side plates 1212, both extending along a second direction Y. The multiple cell rows 121 and multiple side plates 1212 are alternately arranged along a first direction X, and adjacent cell rows 121 and side plates 1212 are interconnected. The side plate 1212 includes a plate body B and a sealing strip L. The sealing strip L includes a first sealing strip L1 and a second sealing strip L2. The plate body B has a first surface M1 facing an adjacent cell row 121, and the first sealing strip L1... Both the first and second limiting adhesive strips L1 and L2 extend along the second direction Y and are disposed on opposite sides of the first surface M1 along the third direction Z. Both the first and second limiting adhesive strips L1 and L2 protrude relative to the first surface M1 toward the direction of the cell array 121, and there is an adhesive area Q between the first limiting adhesive strips L1 and L2 on the first surface M1. The cell array 121 includes a plurality of cells 1211 arranged along the second direction Y. The cell 1211 has a first side surface A1 facing the adjacent first surface M1. The first side surface A1 is covered with an insulating layer, and the insulating layer has a hollow area P. The first surface M1 of the board body B is bonded to the first side surface A1 of the cell 1211. Both the first and second limiting adhesive strips L1 and L2 abut against the first side surface A1, and the adhesive area Q corresponds to the hollow area P.

[0035] Understandably, the cover 130 includes a first cover 112 and a second cover 113, which are respectively connected to the two ends of the frame 111 along the third direction Z.

[0036] In this application, the two adhesive-limiting strips on the side plate 1212 can restrict the overflow of adhesive in the middle area of ​​the plate B to the two sides in the third direction Z, affecting the assembly of other components within the battery pack 100. This ensures that the adhesive in the adhesive area Q can only flow in the second direction Y, achieving bonding between the side plate 1212 and the first side surface A1 of multiple battery cells 1211. Furthermore, the first side surface A1 of the battery cell 1211 is provided with a hollow area P, which facilitates the penetration of adhesive in the adhesive area Q, thereby increasing the bonding area between the battery cell 1211 and the side plate 1212 and making the adhesive bond stronger. In addition, the thickness of the two adhesive-limiting strips L can also limit the coating thickness of the adhesive in the adhesive area Q.

[0037] In some embodiments, the dimension of the plate body B along the third direction Z is H1, and the dimension of the first side surface A1 of the battery cell 1211 along the third direction Z is H2, satisfying H1≤H2. Optionally, in the first direction X, the dimension of the protrusion of the adhesive strip L relative to the first surface M1 is d1, then 0.5mm≤d1≤5mm. Optionally, the plate body B also has a second surface M2 facing away from the first surface M1, and the second surface M2 is also provided with the first adhesive strip L1 and the second adhesive strip L2; the plate body B has a central axis surface perpendicular to the first direction X, and the adhesive strips L of the first surface M1 and the second surface M2 are arranged in a mirror symmetrical manner based on the central axis surface; refer to Figure 5 The above can be considered the structure of the first type of side plate.

[0038] In the above embodiment, the height of the plate B is less than or equal to the height of the first side A1 of the battery cell 1211, which can prevent the adhesive between the side plate 1212 and the battery cell 1211 from overflowing from the third side of the battery cell 1211 towards both sides Z. Furthermore, limiting adhesive strips L are provided on both sides of the plate B to restrict the adhesive in the adhesive areas Q on both sides. In addition, the thickness d1 of the limiting adhesive strip L should not be too large, otherwise it will occupy too much space within the battery pack 100. At the same time, the thickness d1 of the limiting adhesive strip L should not be too small, otherwise it will be difficult to effectively limit the adhesive in the adhesive areas Q. Therefore, d1 should be moderate; for example, d1 can be any value or a range between any two of the following: 0.5mm, 0.8mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm.

[0039] In some embodiments, refer to Figure 5 The first surface M1 and / or the second surface M2 have a first edge b1 and a second edge b2 on both sides along the third direction Z, respectively. The first limiting strip L1 is flush with the first edge b1, and / or the second limiting strip L2 is flush with the second edge b2.

[0040] In some embodiments, the adhesive-limiting strip L includes a first adhesive-limiting strip L1 and a second adhesive-limiting strip L2. The first adhesive-limiting strip L1 has a U-shaped groove C on one side along the third direction Z. The U-shaped groove C extends along the second direction Y. The end of the plate body B along the third direction Z is embedded in the U-shaped groove C, and the opening of the U-shaped groove C abuts against one side of the first surface M1 of the plate body B along the third direction Z. The second adhesive-limiting strip L is disposed on the other side of the first surface M1 along the third direction Z. The adhesive area Q is between the first adhesive-limiting strip L and the second adhesive-limiting strip L. (Refer to...) Figure 7 The above can be the structure of the second type of side panel. Optionally, if the dimension of the first limiting strip L along the first direction X is d2, then 1.5mm≤d2≤15mm.

[0041] In the above embodiments, the adhesive-limiting strip L can also be in the shape of a cap, which is upside down and attached to the end of the side plate 1212 in the third direction Z. It can be understood that the thickness d2 of the adhesive-limiting strip L in this embodiment includes the thickness of the side plate 1212, which can be regarded as three times the thickness d1 of the single-sided adhesive-limiting strip L of the side plate 1212 in the above embodiments. Specifically, d2 can be any value of 1.5mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm or a range between any two of these values.

[0042] In some embodiments, the adhesive strip L includes a main body segment and a branch segment, both of which are disposed on a first surface M1. The main body segment extends along a second direction Y, and the branch segment extends along a third direction Z and is connected to the main body segment at least at one end. The first surface M1 where the main body segment is located has a plurality of opposing battery cells 1211. The main body segment abuts against the first side surface A1 of the plurality of battery cells 1211, and along the first direction X, the orthographic projection of the branch segment on the side plate 1212 is located between the orthographic projections of two adjacent battery cells 1211 on the side plate 1212.

[0043] In some embodiments, refer to Figure 4 A gap is provided between multiple battery cell arrays 121 and at least one side beam 1111, and at least one side plate 1212 extends into the gap and abuts against the side beam 1111. The side plate 1212 covers the battery cell arrays 121, providing protection. Moreover, in the event of a lateral collision with the battery pack 100, the side plate 1212 contacts the side beam 1111 before the battery cells 1211 and transmits force, further protecting the battery cells 1211.

[0044] More specifically, in some embodiments, the frame 111 and the cell assembly 120 have a first gap J1 and a second gap J2. The first gap J1 is located on at least one side of the cell assembly 120 along the first direction X and extends along the second direction Y. The second gap J2 is located on at least one side of the cell assembly 120 along the second direction Y and extends along the first direction X. The first gap J1 and the second gap J2 are in communication, and the first gap J1 and the second gap J2 are filled with adhesive.

[0045] In some embodiments, refer to Figure 2The frame 111 includes two side beams 1111 disposed opposite each other along the second direction Y. A second gap J2 is disposed between at least one side beam 1111 and the cell array 121. Along the second direction Y, at least one end of the side plate 1212 protrudes relative to the cell array 121 to form a protruding portion T, and the protruding portion T extends into the second gap J2. In some embodiments, the side beam 1111 corresponding to the second gap J2 and the protruding portion T are spaced apart along the second direction Y by a distance a, and satisfy 1mm≤a≤20mm;

[0046] In some embodiments, an adhesive injection channel is provided between the side beam 1111 corresponding to the second gap J2 and the protrusion T, and the adhesive injection channel is configured to allow adhesive located on both sides of the side plate 1212 along the first direction X to pass through.

[0047] Optionally, the protruding portion T abuts against the side beam 1111 corresponding to the second gap J2, as shown in the reference. Figure 3 The protruding part T is recessed at one end toward the side beam 1111 in a direction away from the side beam 1111 to form a first notch C1. The first notch C1 passes through the protruding part T along the first direction X and forms an injection channel. Optionally, the first notch C1 is an arc-shaped groove.

[0048] Specifically, the first notch C1 can also be a rectangular notch, a triangular notch, etc. The shape of the first notch C1 is not limited here, as long as it can meet the flow of glue. Among them, the arc-shaped notch has less obstruction to the flow of glue. In addition, the first notch C1 can be located at any end of the third direction Z of the side plate 1212, or it can be located in the middle of the third direction Z of the side plate 1212, or there can be multiple first notches C1 and they are spaced apart along the third direction Z. All of the above solutions are within the protection scope of this application.

[0049] Optionally, refer to Figure 7 The protruding portion T abuts against the side beam 1111 corresponding to the second gap J2. The protruding portion T has a through hole R extending along the first direction X, forming an adhesive injection channel. Optionally, the height of the protruding portion T along the third direction Z is less than that of the cell assembly 120; along the third direction Z, the height of the side plate 1212 is lower than that of the side beam 1111. Understandably, the lower height of the side plate 1212 facilitates the flow of adhesive over it, thus forming an adhesive injection channel, and also prevents adhesive on the adhesive area Q of the side plate 1212 from overflowing from both sides of the cell 1211 in the third direction Z. If the height of the side plate 1212 is higher than that of the cell 1211, the adhesive limiting function of the adhesive limiting strip L will be ineffective.

[0050] It should be noted that, according to the above embodiment, the side plate 1212 can be spaced apart from the side beam 1111 or directly abut against it. However, when the two are directly abutted, an injection channel needs to be provided on the side plate 1212 to facilitate the flow of glue in the second gap J2, and to avoid the second gap J2 being divided into multiple non-connected areas by multiple side plates 1212, which would cause additional cumbersome workload to the glue injection operation.

[0051] Furthermore, when the side plate 1212 and the side beam 1111 are spaced apart, the distance 'a' between them should not be too large, otherwise it will be difficult to protect the battery cell 1211. Conversely, the distance 'a' should not be too small, otherwise it will block the flow of adhesive. Therefore, the value of 'a' should be appropriate. For example, 'a' can be any value of 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, or 20mm, or a range between any two of these values.

[0052] In some embodiments, refer to Figure 3 and Figure 4 The side plate 1212 also has a second notch C2 on its edge. The side beam 1111 protrudes towards the cavity at one end along the third direction Z, forming a positioning part 1113. The positioning part 1113 is used to fix with the second cover 113, and the second notch C2 matches the positioning part 1113. In some embodiments, the cell array 121 includes a plurality of cells 1211. Each cell 121 has two second side surfaces A2 opposite each other along the second direction Y, and two first side surfaces A1 opposite each other along the first direction X. The area of ​​the second side surface A2 is larger than the area of ​​the first side surface A1. Optionally, the cell array 121 also includes a partition 1213. The partition 1213 is attached to the second side surface A2 of the cell 1211, and there is a gap between the two ends of the partition 1213 along the first direction X and the corresponding side plate 1212. Optionally, the partition 1213 is a nano-insulating pad or an MMP foam pad.

[0053] It should be noted that, in some embodiments, the two outermost cells 1211 along the second direction Y in the cell array 121 have MPP foam pads on their outermost second side surface A2, which separate the side beam 1111 from the cell 1211 and serve to buffer and dampen the cell 1211. Two adjacent cells 1211 in the cell array 121 can share a single partition 1213, which can be a nano-insulating pad to block heat transfer between the cells 1211.

[0054] Specifically, MPP foam is a type of foam made from polypropylene using a supercritical foaming process. It is lightweight, high-strength, clean, and environmentally friendly, making it ideal for battery cushioning and shock absorption. Nano-insulating pads are thermal insulation materials prepared using nanotechnology. They possess extremely high thermal insulation performance and good high-temperature resistance, effectively preventing thermal runaway from transferring between battery cells.

[0055] Furthermore, there are gaps between the two ends of the partition 1213 and the side plate 1212 to facilitate assembly and avoid mutual interference. In addition, the side plate 1212 abuts against the positioning part 1113 of the side beam 1111 through the second notch, thereby strengthening the overall structural strength.

[0056] Optionally, refer to Figure 3 The assembly part 1112 and the positioning part 1113 form a weight-reducing cavity. The support plate 114 is assembled to the assembly part 1112 via a locking accessory, and part of the locking accessory structure is housed within the weight-reducing cavity. It should be noted that the weight-reducing cavity not only reduces weight but also accommodates the locking accessory, increasing space utilization. The locking accessory enhances the structural connection's robustness and improves the sealing effect.

[0057] In the above embodiments, the cross-sectional shape of the weight-reducing cavity can be rectangular, square, trapezoidal, circular, etc. Optionally, the inward protrusion dimension of the assembly part 1112 is d, where d satisfies 10mm≤d≤60mm. Specifically, on the one hand, the inward protrusion dimension of the assembly part 1112 cannot be too small, otherwise it will cause difficulties in assembling it with the support plate 114, and the cavity on it will not be able to achieve the weight-reducing effect, and the cavity cannot accommodate the lock accessories. On the other hand, the inward protrusion dimension of the assembly part 1112 cannot be too large, otherwise it will occupy too much space in the battery pack 100, and may even interfere with other components. Therefore, the inward protrusion dimension of the assembly part 1112 should be moderate. For example, the inward protrusion dimension d of the assembly part 1112 can be any one of 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, or a range between any two of these values.

[0058] In some embodiments, a baffle block K is provided at the connection between the first gap J1 and the second gap J2, and the baffle block K is used to prevent the glue in the first gap J1 and the second gap J2 from flowing to each other.

[0059] In this application, there is a first gap J1 and a second gap J2 between the frame 111 and the battery cell assembly 120, which are connected at a corner. The gaps are filled with glue to reinforce the connection and provide shock absorption. A glue-blocking block K is provided at the connection between the first gap J1 and the second gap J2 to prevent the glue in the first gap J1 and the second gap J2 from flowing to each other, thereby dividing the large-area glue filling, that is, filling the glue in small areas, solving the problem of insufficient glue flow, improving the control of glue filling effect, and avoiding glue leakage or missing glue.

[0060] In some embodiments, refer to Figure 4 The retaining blocks K abut against the battery cell assembly 120 and the frame 111 respectively, and along the third direction Z, the height of the retaining blocks K is greater than or equal to the height of the battery cell assembly 120. Optionally, the retaining blocks K are square structures; or, the retaining blocks K are L-shaped structures, including a first part and a second part that are connected to each other and set at an angle, the first part being located in the first gap J1 and the second part being located in the second gap J2.

[0061] Understandably, when the rubber-blocking block K has a square structure, it can be located at the corner between the first gap J1 and the second gap J2, or it can be completely located within the first gap J1 and at one end closer to the second gap J2. Alternatively, the rubber-blocking block K can also be completely located within the second gap J2 and at one end closer to the first gap J1, for example... Figure 4 The example shown is an embodiment of this type. All of the above solutions fall within the protection scope of this application.

[0062] In summary, the adhesive block K separates the connected first gap J1 and second gap J2, facilitating individual control of the amount of adhesive injected into each gap. This prevents some areas from being left unfilled due to insufficient adhesive flow, thus affecting the stability of the battery pack 100. Furthermore, along the second direction Y, the side plate 1212 protrudes from the cell array 121 or directly abuts against the side beam 1111. In the event of a lateral collision with the battery pack 100, the side plate 1212 contacts the side beam 1111 before the cell 1211 and transmits force, thus protecting the cell 1211. Moreover, the protruding portion T on the side plate 1212 is provided with an adhesive injection channel, which will not affect the adhesive injection operation.

[0063] More specifically, in some embodiments, the housing 110 includes a frame 111, a first cover 112, a second cover 113, and a support plate 114. The frame 111 has a first opening H and a second opening on both sides along the third direction Z. The first cover 112 is connected to the frame 111 and covers the first opening H. The second cover 113 is connected to the frame 111 and covers the second opening. The first cover 112, the second cover 113, and the frame 111 enclose a cavity, and the battery cell assembly 120 is disposed in the cavity.

[0064] Optionally, the frame 111 includes four side beams 1111, which are connected end to end to form a square frame. In some embodiments, the battery cell assembly 120 is neatly arranged to form a square structure that matches the frame 111, making full use of the volume within the cavity and increasing the volumetric energy density of the battery pack 100.

[0065] In some embodiments, refer to Figure 6 The four side beams 1111 include two opposing first side beams and two opposing second side beams, with the length of the first side beams being greater than the length of the second side beams. Correspondingly, the cell assembly 120 may include multiple rows of cell columns 121 arranged along the first direction X. Each row of cell columns 121 includes multiple cells 1211 arranged side by side along the second direction Y. Each cell 1211 has an adjacent first side A1 and a second side A2, wherein the area of ​​the first side A1 is smaller than the area of ​​the second side A2. In particular, the second side A2 of all cells 1211 faces the first side beam of the frame 111, and the first side A1 of all cells 1211 faces the second side beam of the frame 111. This can be understood as arranging the narrow side of the frame 111 opposite the narrow side of the cell 1211, which is a reasonable design and minimizes space waste.

[0066] In some embodiments, refer to Figure 3 The support plate 114 is a liquid-cooled plate; the frame 111 also includes an assembly part 1112, which is disposed on the inner sidewall of the frame 111 facing the cavity, and the assembly part 1112 protrudes inward relative to the inner sidewall; on the third direction Z of the frame 111, the assembly part 1112 encloses to form a third opening, the axes of the first opening H, the second opening and the third opening are parallel to each other, and the area of ​​the third opening is smaller than the area of ​​the first opening H or the second opening; the support plate 114 connects the assembly part 1112 and covers the third opening, and the support plate 114 is located between the first cover 112 and the second cover 113, and divides the cavity into a first sub-cavity and a second sub-cavity stacked on top of each other; the battery cell assembly 120 is disposed in one of the first sub-cavity and the second sub-cavity, and the support plate 114 abuts against the battery cell assembly 120.

[0067] Understandably, in some embodiments, the support plate 114 may only serve to support the battery cell 1211 in the third direction Z, without providing cooling or heat dissipation. In contrast, the support plate 114 is a liquid-cooled plate, which may have internal channels for fluid medium flow to absorb and transfer the heat emitted by the battery cell 1211, keeping the temperature of the battery pack 100 within a reasonable range. This integrates the support and heat dissipation structures, further improving the space utilization within the battery pack 100. It should be noted that both of the above embodiments fall within the protection scope of this application.

[0068] In some embodiments, the volume of the first sub-cavity is much larger than the volume of the second sub-cavity. The cell assembly 120 is installed inside the first sub-cavity. Optionally, the second sub-cavity can be used to provide heat dissipation for the liquid cooling plate or to house and isolate electrical components and battery pack reinforcement structures.

[0069] Specifically, the first cover 112, the second cover 113, and the support plate 114 are respectively sealed to the frame 111 to form a multi-seal structure, which improves the sealing effect of the battery and the electrical equipment. Moreover, this application concentrates multiple sealing functions on the side beam 1111 of the frame 111, which can improve the overall integration and increase the space utilization rate while meeting the relevant sealing requirements.

[0070] Secondly, this application proposes an electrical device that includes the battery pack 100 of the first aspect.

[0071] In the above embodiments, the power-consuming device of the second aspect includes the battery pack 100 of the first aspect. Therefore, the power-consuming device of the second aspect has at least all the technical effects of the battery pack 100 of the first aspect, and its specific technical effects will not be described in detail here.

[0072] The embodiments of this application only illustrate the structure of the electrical equipment related to the improvement points of this application in the second aspect, but it does not mean that it does not have other structures. For example, the electrical equipment also includes a battery charging and discharging protection system, a battery auxiliary heat dissipation system, etc. Other structures will not be described one by one here.

[0073] In particular, the term "and / or" in this application should be understood as follows:

[0074] In the first case, the term “and / or” located between the first subject and the second subject includes any of the following meanings: (1) only the first subject; (2) only the second subject; and (3) both the first subject and the second subject.

[0075] In the second case, the term "and / or" between the last two of three or more subjects means including at least any one of the subjects. For example, "first subject, second subject and / or third subject" has the same meaning as "first subject and / or second subject and / or third subject", specifically including the following combinations: (1) only the first subject; (2) only the second subject; (3) only the third subject; (4) the first subject and the second subject and no third subject; (5) the first subject and the third subject and no second subject; (6) the second subject and the third subject and no first subject; and (7) the first subject, the second subject and the third subject.

[0076] In addition, the character " / " in this application generally indicates that the objects before and after it are in an "or" relationship.

[0077] Finally, although the embodiments of this application have been described above in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the concept of this application, and such modifications and variations all fall within the scope of protection of this application.

Claims

1. A battery pack having a first direction (X), a second direction (Y), and a third direction (Z) that intersect two by two, characterized in that, The battery pack comprises a box body (110) and a cell group (120), the box body (110) comprises a cover body (130) and a frame (111), the cover body (130) is connected to the end of the frame (111) along the third direction (Z), and the cover body (130) and the frame (111) form a cavity; the cell group (120) is located in the cavity; The cell group (120) comprises a plurality of cell columns (121) and a plurality of side plates (1212), the plurality of cell columns (121) and the plurality of side plates (1212) are arranged alternately along the first direction (X), and the cell column (121) and the adjacent side plate (1212) are connected to each other; The side plate (1212) comprises a plate body (B), a first glue limiting strip (L1) and a second glue limiting strip, the plate body (B) has a first surface (M1) facing an adjacent cell column (121), the first surface (M1) has a first glue limiting strip (L1) and a second glue limiting strip (L2) at opposite ends along the third direction (Z), the first glue limiting strip (L1) and the second glue limiting strip (L2) extend along the second direction (Y) and protrude from the first surface (M1) to the side of the cell column (121); the first surface (M1) has a glue area (Q), and the glue area (Q) is located between the first glue limiting strip (L1) and the second glue limiting strip (L2); The cell column (121) comprises a plurality of cells (1211) arranged along the second direction (Y), the cell (1211) has a first side surface (A1) facing an adjacent first surface (M1), the first side surface (A1) is covered with an insulating layer, the insulating layer has a hollow area (P), the first surface (M1) of the plate body (B) is bonded to the first side surface (A1) of the cell (1211), the first glue limiting strip (L1) and the second glue limiting strip (L2) abut against the first side surface (A1), and the glue area (Q) corresponds to the hollow area (P) along the first direction (X).

2. The battery pack of claim 1, wherein, Along the third direction (Z), the size H1 of the plate body (B) is less than or equal to the size H2 of the first side surface (A1) of the cell (1211).

3. The battery pack of claim 1, wherein, The plate body (B) also has a second surface (M2) facing away from the first surface (M1) along the first direction (X), the second surface (M2) is also provided with the first glue limiting strip (L1) and the second glue limiting strip (L2); the first glue limiting strips (L1) of the first surface (M1) and the second surface (M2) are oppositely arranged along the first direction (X); the second glue limiting strips (L2) of the first surface (M1) and the second surface (M2) are oppositely arranged along the first direction (X).

4. The battery pack of claim 2, wherein, The first surface (M1) and / or the second surface (M2) have a first edge (b1) and a second edge (b2) on both sides along the third direction (Z); The first glue limiting strip (L1) is flush with the first edge (b1), and / or the second glue limiting strip (L2) is flush with the second edge (b2).

5. The battery pack of claim 1, wherein, The cell column (121) further comprises a separator (1213), one end of the cell (1211) along the second direction (Y) has a second side (A2), and the separator (1213) is attached to the second side (A2) of the cell (1211), and along the first direction (X), the separator (1213) is spaced apart from the two adjacent side plates (1212).

6. The battery pack of claim 5, wherein, The separator (1213) is a nano thermal insulation pad or MPP foam pad.

7. The battery pack of any one of claims 1 to 6, wherein, The frame (111) comprises two side beams (1111) oppositely arranged along the second direction (Y), and in the second direction (Y), the cell column (121) has a gap between the two side beams (1111).

8. The battery pack of claim 7, wherein, In the second direction (Y), the side plate (1212) has a protruding portion (T) relative to both ends of the cell column (121), and the protruding portion (T) is located in the gap.

9. The battery pack of claim 8, wherein, The gap is filled with a colloid, one end of the protruding portion (T) along the second direction (Y) abuts against the side beam (1111), and the end of the protruding portion (T) towards the side beam (1111) is provided with a first missing slot (C1) and / or a through hole (R), the first missing slot (C1) and / or the through hole (R) penetrate the side plate (1212) along the first direction (X), and the first missing slot (C1) and / or the through hole (R) are used for the colloid to pass through.

10. An electric device, characterized by The battery pack (100) of any one of claims 1 to 9. The battery pack (100) of any one of claims 1 to 9.

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