Battery pack

Abstract

The utility model relates to the technical field of batteries, and particularly provides a battery pack which comprises a shell, a battery pack, an acquisition wire harness, a first flexible part and a second flexible part, a battery compartment is arranged in the shell; the battery pack is arranged in the battery compartment and is provided with a busbar; the acquisition wire harness is arranged in the battery compartment and is electrically connected with the busbar; the first flexible part is supported between the acquisition wire harness and the battery pack; the second flexible part is supported between the collection wire harness and the inner wall of the shell, and at least partial projections of the first flexible part, the collection wire harness and the second flexible part coincide. According to the battery pack, the first flexible part and the second flexible part are supported on the two faces of the collection wire harness, after the battery pack is assembled, deformation force of the first flexible part and the second flexible part is transmitted to the collection wire harness, and certain pressing force is applied to the collection wire harness, so that the position stability of the collection wire harness is improved, and the collection wire harness is prevented from shaking; in addition, the first flexible part and the second flexible part can also play a role in buffering and damping, and the collection wire harness is further prevented from being torn.

Description

Technical Field

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

[0002] Some power battery packs are equipped with a data acquisition harness for collecting battery temperature and voltage. The data acquisition harness is electrically connected to each individual battery cell through multiple branches led out from the main circuit. When the battery pack vibrates, the data acquisition harness is prone to shaking, which can cause tearing at the connection between the main circuit and the branches in the data acquisition harness. Utility Model Content

[0003] 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:

[0004] This application proposes a battery pack comprising a housing, a battery pack, a data acquisition harness, a first flexible member, and a second flexible member. The housing contains a battery compartment; the battery pack is disposed within the battery compartment and has a busbar; the data acquisition harness is disposed within the battery compartment and electrically connected to the busbar; the first flexible member is supported between the data acquisition harness and the battery pack; the second flexible member is supported between the data acquisition harness and the inner wall of the housing, and the first flexible member, the data acquisition harness, and the second flexible member at least partially overlap in projection.

[0005] The technical solution proposed in this application has at least the following technical effects:

[0006] In this application, the first flexible member and the second flexible member support the two sides of the data acquisition harness. After the battery pack is assembled, the deformation force of the first flexible member and the second flexible member is transmitted to the data acquisition harness, which provides a certain clamping force to it, thereby improving the positional stability of the data acquisition harness and preventing it from shaking. Moreover, the first flexible member and the second flexible member can also play a role in buffering and shock absorption, further preventing the data acquisition harness from tearing. Attached Figure Description

[0007] 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.

[0008] Specifically, the annotations for the accompanying drawings are as follows:

[0009] Figure 1 This is a partial structural side cross-sectional view of the battery pack described in some embodiments of this application;

[0010] Figure 2This is a partially enlarged structural schematic diagram of the battery pack described in some embodiments of this application (insulating plate and individual battery cells are not shown);

[0011] Figure 3 This is a schematic diagram of the overall structure of the battery pack described in some embodiments of this application.

[0012] Specifically, the annotations for the figure marks in the instruction manual are as follows:

[0013] 1. Housing; 10. Battery pack; 101. Terminal post; 102. Busbar; 20. Data acquisition harness; 201. Main circuit; 202. Branch circuit; 30. First flexible component; 40. Second flexible component; 50. Insulating plate; 60. Third flexible component; 70. Cover; 80. Frame; X, First direction; Y, Second direction; Z, Third direction. Detailed Implementation

[0014] To make the embodiments of this application clearer, they will be described below in conjunction with the accompanying drawings. It should be understood that the content mentioned below represents only some embodiments of this application, and not all embodiments are listed exhaustively. Therefore, other embodiments that can be obtained based on the following embodiments without any inventive effort fall within the protection scope of this application.

[0015] 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.

[0016] 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.

[0017] 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.

[0018] 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.

[0019] The embodiments of this application are described below with reference to the accompanying drawings. It can be understood that the technical features involved in the different embodiments described below can be combined with each other as long as they do not conflict with each other.

[0020] Reference Figures 1 to 3 This application provides an embodiment of a battery pack, which includes a housing 1, a battery pack 10, a data acquisition harness 20, a first flexible member 30, and a second flexible member 40. The housing 1 has a battery compartment inside; the battery pack 10 is disposed within the battery compartment and has a busbar 102; the data acquisition harness 20 is disposed within the battery compartment and electrically connected to the busbar 102; the first flexible member 30 is supported between the data acquisition harness 20 and the battery pack 10; the second flexible member 40 is supported between the data acquisition harness 20 and the inner wall of the housing 1, and the first flexible member 30, the data acquisition harness 20, and the second flexible member 40 at least partially overlap in projection.

[0021] In this embodiment, the first flexible member 30 and the second flexible member 40 are supported on both sides of the data acquisition harness 20. After the battery pack is assembled, the deformation force of the first flexible member 30 and the second flexible member 40 is transmitted to the data acquisition harness 20, which has a certain clamping force on it, thereby improving the positional stability of the data acquisition harness 20 and preventing it from shaking. Moreover, the first flexible member 30 and the second flexible member 40 can also play a buffering and shock-absorbing role, further preventing the data acquisition harness 20 from tearing.

[0022] Optionally, the busbar 102 is an aluminum busbar that is electrically connected to the terminal post 101 of the battery pack 10.

[0023] For ease of explanation, a spatial rectangular coordinate system is established with the length direction of the battery pack as the first direction X, the width direction of the battery pack as the second direction Y, and the height direction of the battery pack as the third direction Z. It can be seen that the first direction X, the second direction Y, and the third direction Z are all perpendicular to each other.

[0024] It should be noted that the first flexible component 30, the acquisition harness 20, and the second flexible component 40 are stacked in a Z-direction. The phrase "the first flexible component 30, the acquisition harness 20, and the second flexible component 40 at least partially overlap in projection" refers to the first flexible component 30, the acquisition harness 20, and the second flexible component 40 along their arrangement direction (i.e.,...). Figure 1The orthographic projections of the third direction (Z) in the image at least partially overlap. The same applies below; all projections in this application refer to the orthographic projections along the third direction (Z), and will not be elaborated further.

[0025] In some embodiments, refer to Figure 1 The battery pack also includes an insulating plate 50, which is disposed inside the battery compartment and covers at least the busbar 102 and the data collection harness 20; a second flexible member 40 is disposed between the insulating plate 50 and the inner wall of the housing 1.

[0026] In this embodiment, the insulating plate 50 provides insulation, preventing the busbar 102 from contacting the inner wall of the housing 1, which could lead to a short circuit in the battery pack and cause safety issues. Furthermore, the second flexible member 40 is positioned between the insulating plate 50 and the inner wall of the housing 1. The insulating plate 50 then transmits the deformation force of the second flexible member 40 to the data acquisition harness 20, increasing the contact area, improving support, and preventing the data acquisition harness 20 from swaying.

[0027] In some embodiments, refer to Figure 1 The thickness of the insulating board 50 is d, and it satisfies 0.3mm≤d≤0.8mm.

[0028] In this embodiment, if the insulating plate 50 is too thin, its strength is insufficient and it is easily crushed; if the insulating plate 50 is too thick, its stiffness is too high and it is not easy to deform, thus making it difficult to transmit the deformation force of the second flexible member 40 to the acquisition wire harness 20. Therefore, the thickness d of the insulating plate 50 should be moderate. For example, d can be any one of 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm and 0.8mm or within the range of any two of these values.

[0029] In some embodiments, refer to Figure 2 ( Figure 2 (The insulating plate 50 is not shown in the figure). The battery pack also includes a third flexible member 60, which is disposed between the insulating plate 50 and the inner wall of the housing 1, and the third flexible member 60 at least partially overlaps with the busbar 102 in projection.

[0030] In this embodiment, the third flexible member 60 supports the busbar 102 by transmitting deformation force through the insulating plate 50. Understandably, the other side of the busbar 102 is supported by the terminal post 101 of the battery pack 10, thereby ensuring the stability of the busbar 102 and preventing the busbar 102 from shaking and causing tearing at its connection with the acquisition harness 20.

[0031] It should be understood that "the third flexible member 60 and the busbar 102 at least partially coincide in projection" means that their orthogonal projections along the direction perpendicular to the busbar 102 (i.e., the third direction Z) at least partially coincide.

[0032] It should be noted that the third flexible component 60 may or may not have a projection overlap with the acquisition harness 20; both are acceptable implementation methods.

[0033] In some embodiments, the acquisition harness 20 includes a main path 201 and a branch path 202 connected to the main path 201, the branch path 202 being electrically connected to the busbar 102; the first flexible member 30 at least partially overlaps with the main path 201 in projection.

[0034] In this embodiment, the main path 201 and the branch path 202 of the acquisition harness 20 are set at an angle. When the main path 201 shakes, the connection between the main path 201 and the branch path 202 is prone to tearing. The first flexible member 30 can be supported between the battery pack 10 and the main path 201 of the acquisition harness 20, so as to cooperate with the second flexible member 40 to provide stable support for the position of the main path 201.

[0035] In some embodiments, the second flexible member 40 has a projection overlap with the main path 201 of the acquisition harness 20, and the second flexible member 40 does not have a projection overlap with the branch path 202 of the acquisition harness 20.

[0036] In this embodiment, one implementation of the second flexible member 40 is proposed, that is, the second flexible member 40 only supports the main road 201 and does not support the branch road 202, thereby ensuring the stability of the position of the main road 201 and preventing the main road 201 from shaking and tearing with the branch road 202.

[0037] In some embodiments, refer to Figure 1 The second flexible element 40 has a projection overlap with both the main path 201 and the branch path 202 of the acquisition harness 20; along the extension direction of the branch path 202, the dimension of the projection overlap between the branch path 202 and the second flexible element 40 is h, the length of the branch path is H, and it satisfies 0.3≤h / H≤0.7.

[0038] In this embodiment, another implementation of the second flexible member 40 is proposed, namely, the second flexible member 40 supports both the main road 201 and part of the branch road 202, which is also a desirable implementation. Specifically, along the extending direction of the branch road 202 (i.e.... Figure 1In the second direction Y), the ratio of the dimension h of the branch 202 that coincides with the projection of the second flexible member 40 to the length H of the branch 202 should satisfy 0.3≤h / H≤0.7. Specifically, if the h / H ratio is too small, the clamping force provided by the second flexible member 40 to the branch 202 will be small, the branch 202 will shake a lot, and the branch 202 of the acquisition harness 20 will be prone to tearing. In addition, the branch 202 is connected to the acquisition unit, which is electrically connected to the busbar 102. When the battery pack 10 expands, it is easy to drive the busbar 102 to shift, which in turn causes the branch 202 to shift. If the h / H ratio is too large, the part of the branch 202 that does not coincide with the projection of the second flexible member 40 will be too short, and the offset margin of the branch 202 will be small, which will easily cause the acquisition unit to separate from the busbar 102.

[0039] In some embodiments, the first flexible element 30 and / or the second flexible element 40 are foam blocks.

[0040] In this embodiment, an optional configuration of the first flexible member 30 and the second flexible member 40 is proposed. Specifically, the foam block can both provide support and effectively achieve shock absorption.

[0041] Understandably, the third flexible component 60 mentioned above can also be a foam block.

[0042] In some embodiments, the acquisition harness 20 is flush with the height of the busbar 102.

[0043] In this embodiment, the data acquisition harness 20 is supported by the first flexible member 30, and the busbar 102 is supported by the terminal post 101 of the battery pack 10. The branches 202 of the data acquisition harness 20 are welded to the busbar 102, and the data acquisition harness 20 and the busbar 102 are kept as close as possible in height. This means that the branches 202 and the busbar 102 are kept as close as possible to the same horizontal plane perpendicular to the X direction, which facilitates the welding operation and helps to avoid the branches 202 being tilted and easily torn.

[0044] In some embodiments, references to 1 to Figure 3 The housing 1 includes a frame 80 and a cover 70. The frame 80 has an opening, and the cover 70 seals the opening. The cover 70 and the frame 80 enclose a battery compartment. The second flexible member 40 is supported between the acquisition harness 20 and the cover 70. And / or the battery pack 10 includes multiple individual cells. The multiple individual cells are arranged along a first direction X. Adjacent individual cells are electrically connected through a busbar 102. The acquisition harness 20 extends along the arrangement direction of the individual cells (i.e., the first direction X).

[0045] In this embodiment, a housing 1 is proposed, with the second flexible member 40 supported between the data acquisition harness 20 and the cover 70. Specifically, the second flexible member 40 is disposed between the insulating plate 50 and the cover 70, facilitating the assembly of the battery pack. That is, when the cover 70 seals the opening of the frame 80, the second flexible member 40 is simultaneously squeezed, allowing the insulating plate 50 to transfer the deformation force of the second flexible member 40 to the data acquisition harness 20, thus providing stable support for the data acquisition harness 20. In addition, the battery pack 10 includes multiple individual cells arranged along the first direction X. Adjacent individual cells are electrically connected through a busbar 102. The main path 201 of the data acquisition harness 20 also extends along the first direction and is electrically connected to each busbar 102 through multiple branch paths 202 extending from the main path 201. The structure is reasonably designed, compactly arranged, and has high space utilization.

[0046] Specifically, in some embodiments not shown in the figures, the battery pack is equipped with a battery management device, and the main circuit 201 of the acquisition harness 20 can be electrically connected to the battery management device. The acquisition harness 20 is used to transmit the temperature and voltage signals acquired from each individual battery cell to the battery management device.

[0047] It should be noted that the battery pack in this embodiment may also include other components, such as a battery charge and discharge protection board, a heat dissipation structure, etc. Other components will not be described here.

[0048] In particular, the term "and / or" in this application should be understood as follows:

[0049] In the first case, the term “and / or” 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.

[0050] 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) first subject and second subject and no third subject; (5) first subject and third subject and no second subject; (6) second subject and third subject and no first subject; and (7) first subject, second subject and third subject;

[0051] Furthermore, the character " / " in this application indicates that the objects before and after it are in an "or" relationship.

[0052] 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, characterized in that, include: The casing (1) has a battery compartment inside; A battery pack (10) is located in the battery compartment and is provided with a busbar (102); A data acquisition harness (20) is located inside the battery compartment and electrically connected to the busbar (102); The first flexible element (30) is supported between the acquisition harness (20) and the battery pack (10); The second flexible member (40) is supported between the acquisition wire harness (20) and the inner wall of the housing (1), and the first flexible member (30), the acquisition wire harness (20) and the second flexible member (40) at least partially overlap in projection.

2. The battery pack according to claim 1, characterized in that, The battery pack also includes an insulating plate (50), which is disposed in the battery compartment and covers at least the busbar (102) and the data acquisition harness (20); The second flexible member (40) is disposed between the insulating plate (50) and the inner wall of the housing (1).

3. The battery pack according to claim 2, characterized in that, The thickness of the insulating plate (50) is d, and satisfies 0.3mm≤d≤0.8mm.

4. The battery pack according to claim 2, characterized in that, The battery pack also includes a third flexible element (60), which is disposed between the insulating plate (50) and the inner wall of the housing (1), and the third flexible element (60) at least partially overlaps with the busbar (102) in projection.

5. The battery pack according to claim 1, characterized in that, The data acquisition harness (20) includes a main path (201) and a branch path (202) connected to the main path (201), and the branch path (202) is electrically connected to the busbar (102); The first flexible element (30) at least partially overlaps with the main road (201) in projection.

6. The battery pack according to claim 5, characterized in that, The second flexible member (40) has a projection overlap with the main path (201) of the acquisition harness (20), and the second flexible member (40) does not have a projection overlap with the branch path (202) of the acquisition harness (20).

7. The battery pack according to claim 5, characterized in that, The second flexible member (40) has a projection overlap with both the main path (201) and the branch path (202) of the acquisition harness (20); Along the extension direction of the branch (202), the dimension of the branch (202) that coincides with the projection of the second flexible member (40) is h, the length of the branch (202) is H, and satisfies 0.3≤h / H≤0.

7.

8. The battery pack according to any one of claims 1 to 7, characterized in that, The first flexible element (30) and / or the second flexible element (40) are foam blocks.

9. The battery pack according to any one of claims 1 to 7, characterized in that, The acquisition harness (20) is at the same height as the busbar (102).

10. The battery pack according to any one of claims 1 to 7, characterized in that, The housing (1) includes a frame (80) and a cover (70). The frame (80) has an opening, and the cover (70) covers the opening. The cover (70) and the frame (80) enclose the battery compartment. The second flexible member (40) is supported between the acquisition harness (20) and the cover (70). And / or, the battery pack (10) includes a plurality of individual cells arranged along a first direction (X), adjacent individual cells are electrically connected through the busbar (102), and the acquisition harness (20) extends along the arrangement direction of the individual cells.

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