Battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses a battery pack. The battery pack comprises a box body and a battery pack arranged in the box body, and the battery pack comprises a plurality of battery monomers arranged along a first direction; the battery pack comprises a busbar and an acquisition piece, the busbar is connected between poles of adjacent battery monomers, the busbar is provided with a body part and a convex part, and the body part is provided with a welding area; the collecting part is arranged on the upper surface of the body part, the upper surface of the protruding part is higher than the upper surface of the collecting part, the collecting part at least shields the welding area, and at least part of the busbar is higher than the top surface of the collecting part. The collecting piece of the battery pack at least shields the welding area, the upper surface of the protruding part is higher than the upper surface of the collecting piece, damage to the collecting piece can be effectively reduced, and meanwhile connection of the welding positions of the busbar and the pole is more reliable.

Description

Battery pack Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery pack. Background Technology

[0002] CTB (Cell to Body) battery-vehicle integration technology refers to the technology of integrating the battery pack with the vehicle body frame as a whole. In this technology, the sensor is located on top of the busbar, making it susceptible to damage when the top cover of the battery module is stepped on. At the same time, since the busbar is welded to the battery cell terminals, the welded area is also easily damaged when the top cover of the battery module is stepped on.

[0003] Therefore, there is an urgent need for a battery pack to solve the above problems. Summary of the Invention

[0004] Based on the above, the purpose of this utility model is to provide a battery pack that can reduce damage to the sampling components, while making the connection between the busbar and the terminal welding position more reliable.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A battery pack includes a housing and a battery array disposed within the housing, the battery array comprising a plurality of battery cells arranged along a first direction, and further comprising:

[0007] A busbar is provided between the terminals of adjacent battery cells. The busbar has a body and a protrusion. The body has a welding area.

[0008] A collection element is disposed on the upper surface of the main body, and the upper surface of the protrusion is higher than the upper surface of the collection element, and the collection element at least partially obscures the welding area.

[0009] The beneficial effects of this utility model are as follows:

[0010] This invention features a welding area on the busbar for laser welding between the busbar and the terminal posts of individual battery cells, with adjacent battery cells electrically connected by busbars. Simultaneously, a data acquisition unit located on the side of the busbar furthest from the battery cells collects temperature and humidity data of the battery pack. This unit at least partially shields the welding area, protecting it from foreign objects and effectively reducing corrosion and short circuits caused by such contaminants. Furthermore, the upper surface of the protrusion is higher than the upper surface of the data acquisition unit, allowing the protrusion to withstand the force exerted on the battery pack, reducing the force on the data acquisition unit and thus preventing damage and improving the reliability of the battery pack. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0012] Figure 1 is a schematic diagram of the battery pack provided in a specific embodiment of this utility model;

[0013] Figure 2 is a schematic diagram of one of the battery packs provided in a specific embodiment of the present invention;

[0014] Figure 3 is a magnified view of part A in Figure 2;

[0015] Figure 4 is a schematic diagram of a busbar of a battery pack provided in a specific embodiment of this utility model;

[0016] Figure 5 is a schematic diagram of another busbar of the battery pack provided in a specific embodiment of this utility model;

[0017] Figure 6 is a schematic diagram of a cross-section of the first type of battery pack along the second direction provided in a specific embodiment of the present invention;

[0018] Figure 7 is a schematic diagram of a cross-section of the second type of battery pack along the second direction provided in a specific embodiment of the present invention;

[0019] Figure 8 is a schematic diagram of a cross-section of the third type of battery pack along the second direction provided in a specific embodiment of this utility model;

[0020] Figure 9 is a schematic diagram of the cross-section of the fourth type of battery pack along the second direction provided in a specific embodiment of this utility model;

[0021] Figure 10 is a schematic diagram of the cross-section of the fifth type of battery pack along the second direction provided in a specific embodiment of this utility model.

[0022] In the picture:

[0023] 1. Housing; 10. Battery pack; 11. Individual battery cell; 12. Terminal post;

[0024] 100. Busbar; 110. Protrusion; 111. Protrusion area; 112. Protrusion; 120. Protective groove; 130. Reinforcement; 140. Through hole; 150. Foolproof notch; 160. Body section;

[0025] 200. Collected items;

[0026] 300. Data acquisition branch; 310. Connecting part;

[0027] 400. Support component; 410. Stop bar;

[0028] 500. Protective layer. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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 of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0031] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and connections within two components or interactions between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0034] As shown in Figure 1, this embodiment provides a battery pack, which includes a housing 1 and battery packs 10 disposed within the housing 1. Multiple battery packs 10 are arranged along a second direction, and each battery pack 10 includes multiple battery cells 11 arranged along a first direction. It is worth noting that a portion of the battery packs 10 is hidden in Figure 1.

[0035] As shown in Figures 2-10, the battery pack also includes a busbar 100 and a collector 200. The busbar 100 is connected between the terminals 12 of adjacent battery cells 11. The busbar 100 is provided with a body portion 160 and a protrusion portion 110. The body portion 160 is provided with a welding area. The collector 200 is provided on the upper surface of the body portion 160, and the upper surface of the protrusion portion 110 is higher than the upper surface of the collector 200. The collector 200 at least partially blocks the welding area.

[0036] A welding area is provided on the busbar 100 for laser welding between the busbar 100 and the terminal post 12 of the battery cell 11, and busbars 100 are electrically connected between adjacent battery cells 11. Simultaneously, a data acquisition element 200 is provided on the side of the busbar 100 away from the battery cell 11. The data acquisition element 200 is used to collect the temperature and voltage of the battery pack 10. The data acquisition element 200 at least partially shields the welding area, providing protection to the shielded portion and preventing foreign objects from entering the welding area, effectively reducing corrosion and short circuit problems caused by foreign objects entering the welding area. Furthermore, the upper surface of the protrusion 110 is higher than the upper surface of the data acquisition element 200, allowing the protrusion 110 to withstand the stepping force acting on the battery pack, reducing the stepping force on the data acquisition element 200, thereby preventing damage to the data acquisition element 200 under stress and improving the reliability of the battery pack.

[0037] In this embodiment, the battery pack includes a housing 1, within which multiple battery groups 10 are disposed. Each battery group 10 includes individual battery cells 11 arranged along a first direction, with a terminal post 12 positioned above each battery cell 11. A busbar 100 connects the terminals 12 of adjacent battery cells 11. By providing the busbar 100, it is used to connect with the terminals 12 of two adjacent battery cells 11 along the first direction, thereby achieving electrical connection between adjacent battery cells 11. The busbar 100 is welded to the terminal post 12, making the connection more reliable. The collecting element 200 extends along the first direction to connect with the multiple busbars 100 arranged along the first direction.

[0038] Preferably, the collecting element 200 completely covers the welding area, that is, in the horizontal direction, the welding area is completely covered by the collecting element 200, which can further improve the protective effect of the collecting element 200 on the welding area and prevent foreign objects from entering the welding area.

[0039] Specifically, the protrusion 110 is arranged parallel to the collection component 200, that is, the protrusion 110, the main body 160, and the collection component 200 are all arranged in parallel, which makes better use of space, and at the same time makes the protrusion 110 better at bearing the force of stepping on the battery pack, the force is more even, and it can reduce damage to the battery pack.

[0040] Furthermore, as shown in Figure 6, the battery pack also includes a support member 400, which is disposed between the acquisition member 200 and the main body 160. The support member 400 is used to support and fix the acquisition member. For example, the support member 400 is generally made of foam or PC sheet. To install the support member 400, its upper surface can be bonded to the acquisition member 200, and its lower surface can be bonded to the main body 160.

[0041] In this embodiment, a through hole 140 is provided in the welding area. The through hole 140 serves as a positioning element for movement during welding of the busbar 100 and the pole post 12. Exemplarily, two support members 400 are provided, positioned on either side of the through hole 140, improving the support effect on the busbar 100. In other embodiments, the support member 400 is provided with a clearance hole communicating with the through hole 140, and the support member 400 does not obstruct the through hole 140; that is, the support member 400 avoids interference with the through hole 140 by providing the clearance hole. Exemplarily, the clearance hole of the support member 400 is coaxially arranged with the through hole 140, and its diameter is larger than that of the through hole 140.

[0042] Optionally, as shown in Figure 7, the battery pack is also provided with a protective layer 500, which shields the through-hole 140. When the acquisition component 200 is welded to the terminal post 12, welding residue may remain in the welding area, easily puncturing the acquisition component 200 and damaging the internal wiring, affecting its normal operation. The protective layer 500 separates the welding area from the acquisition component 200, effectively preventing welding residue from puncturing the acquisition component 200, thus avoiding the risk of short circuits or failure, and ensuring the safety and reliability of the acquisition component 200.

[0043] Specifically, a protective groove 120 is provided on the side of the busbar 100 near the collector 200. The protective groove 120 is used to install the protective layer 500. The protective groove 120 surrounds the circumference of the through hole 140, which is located at the bottom of the groove 120 and is coaxial with it. The protective layer 500, which is adapted to the shape of the protective groove 120, is disposed within the groove 120. The depth of the protective groove 120 is adapted to the thickness of the protective layer 500, ensuring stable assembly of the protective layer 500 within the groove 120 while avoiding interference or adverse effects on the collector 200. For example, the protective layer 500 is made of PC or PE material. Furthermore, the projection of the welding area onto the busbar 100 is circular; correspondingly, the through hole 140, the protective groove 120, and the protective layer 500 are all circular.

[0044] In other embodiments, as shown in FIG8, the protective layer 500 may not be provided, and the support member 400 can completely block the through hole 140, thereby separating the welding area and the collection member 200, and ensuring the safety and reliability of the collection member 200.

[0045] Preferably, as shown in FIG9, one end of the support member 400 extends out of the body portion 160 and is provided with a baffle 410 that bends toward the battery cell and abuts against the top of the battery cell. By providing the baffle 410, foreign objects and dust can be effectively blocked. It is worth noting that two collection members 200 are spaced apart along a second direction perpendicular to the first direction in the battery pack. When the support member 400 is provided with the baffle 410, the baffle 410 is located on the outer side of the battery pack along the second direction, that is, on the side where the two collection members 200 are far apart from each other.

[0046] In this embodiment, the height difference between the protrusion 110 and the main body 160 is set to 0.2mm-0.5mm. If the height difference between the protrusion 110 and the main body 160 is too large, the installation height of the collecting element 200 will also be greater, requiring a thicker support element 400. This will increase the weight of the battery pack, increase material usage, and consequently increase costs. If the height difference between the protrusion 110 and the main body 160 is too small, the collecting element 200 will be easily subjected to trampling forces, which is detrimental to its protective function.

[0047] As an optional solution for the battery pack, a data acquisition branch 300 is also provided on one side of the data acquisition component 200. The data acquisition branch 300 is connected to the protrusion 110, which provides effective and reliable support for the data acquisition branch 300. It is understood that the data acquisition branch 300 is also electrically connected to the data acquisition component 200. For example, the data acquisition branch 300 is a temperature acquisition component used to acquire the temperature of the battery pack in real time.

[0048] Preferably, the protrusion 110 is provided with a groove, and the collection branch 300 is at least partially fixedly connected to the groove. By fixing at least part of the collection branch 300 to the groove, not only can the installation of the collection branch 300 be realized, but also the collection branch 300 is prevented from protruding too much from the protrusion 110, which helps to reduce the excessive trampling force on the collection branch 300.

[0049] Specifically, in order to achieve the connection between the acquisition branch 300 and the acquisition component 200, the acquisition branch 300 extends at least partially to form a protrusion 110, and the part extending to form the protrusion 110 is a connecting part 310, that is, the acquisition branch 300 is electrically connected to the acquisition component 200 through the connecting part 310.

[0050] In this embodiment, the protrusion 110 includes two protrusion areas 111 spaced apart along a first direction. By providing two protrusion areas 111, the number of protrusions 112 is increased, and the total area of ​​the upper surface of the protrusions 112 is larger. Therefore, under the same stepping force, the larger the force-bearing area, the smaller the stress.

[0051] Furthermore, a reinforcing portion 130 is provided between the two raised areas 111, and the reinforcing portion 130 is recessed towards the side away from the data acquisition element 200. The reinforcing portion 130 not only accommodates the assembly gap between two adjacent battery cells 11, but also improves the structural strength of the busbar 100. It is worth noting that the width of the reinforcing portion 130 can be set according to the distance between adjacent battery cells 11 to achieve electrical connection between adjacent battery cells 11.

[0052] Preferably, as shown in Figures 5 and 10, the raised area 111 includes two protrusions 112 spaced apart along a second direction. The two protrusions 112 are located on both sides of the collecting element 200, and the second direction is perpendicular to the first direction. That is, the collecting element 200 is completely located within the recess formed between the four protrusions 112. When the battery pack is stepped on, it can be ensured that the collecting element 200 is not subjected to force, and at the same time, the stepping force can be transmitted to multiple protrusions 112 simultaneously, avoiding the problem of excessive concentration of load.

[0053] Furthermore, one end of the raised area 111 extends to the edge of the manifold 100, and the other side is connected to the main body 160 via a connecting surface. The connecting surface is inclined to facilitate a smooth transition between the raised area 112 and the main body 160, which helps to smoothly transmit the pedaling force on the raised area 112 to the main body 160. Optionally, the angle between the connecting surface and the main body 160 is set to 120°-160°.

[0054] Preferably, as shown in Figure 4, the busbar 100 is also provided with a foolproof notch 150 to remind installers of the correct installation direction and improve assembly efficiency.

[0055] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A battery pack, characterized in that, The device includes a housing (1) and a battery pack (10) placed inside the housing (1). The battery pack (10) includes a plurality of battery cells (11) arranged along a first direction. It also includes a busbar (100) connected between the terminals (12) of adjacent battery cells (11). The busbar (100) is provided with a body portion (160) and a protrusion portion (110). The body portion (160) is provided with a welding area. A collection element (200) is provided on the upper surface of the body portion (160), and the upper surface of the protrusion portion (110) is higher than the upper surface of the collection element (200). The collection element (200) at least partially covers the welding area.

2. The battery pack according to claim 1, characterized in that, The collecting element (200) completely covers the welding area.

3. The battery pack according to claim 1 or 2, characterized in that, The battery pack also includes a support member (400) disposed between the collecting member (200) and the main body (160).

4. The battery pack according to claim 3, characterized in that, The welding area is provided with a through hole (140), and two support members (400) are provided, with the two support members (400) located on both sides of the through hole (140).

5. The battery pack according to claim 4, characterized in that, The battery pack is also provided with a protective layer (500) that shields the through-hole (140).

6. The battery pack according to claim 3, characterized in that, The welding area is provided with a through hole (140), and the support member (400) covers the through hole (140).

7. The battery pack according to claim 3, characterized in that, One end of the support member (400) extends out of the body portion (160) and is provided with a baffle (410) that bends toward the battery cell (11) and abuts against the top of the battery cell (11).

8. The battery pack according to claim 1, characterized in that, A collection branch (300) is also provided on one side of the collection component (200), and the collection branch (300) is connected to the protrusion (110).

9. The battery pack according to claim 8, characterized in that, The protrusion (110) is provided with a groove, and the acquisition branch (300) is at least partially fixedly connected to the groove.

10. The battery pack according to claim 1, characterized in that, The battery pack includes a plurality of battery cells (11) arranged along a first direction, and a busbar (100) is connected between the terminals (12) of two adjacent battery cells (11), and the collection element (200) extends along the first direction.

11. The battery pack according to claim 10, characterized in that, The protrusion (110) includes two protrusion regions (111) spaced apart along the first direction.

12. The battery pack according to claim 11, characterized in that, One end of the protruding area (111) extends to the edge of the busbar (100), and the other side is connected to the body part (160) through a connecting surface.

13. The battery pack according to claim 11, characterized in that, The raised area (111) includes two raised areas (112) spaced apart along a second direction. The two raised areas (112) are located on both sides of the collecting element (200), and the second direction is perpendicular to the first direction.

14. The battery pack according to claim 1, characterized in that, The height difference between the protrusion (110) and the body (160) is set to 0.2mm-0.5mm.

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