Battery pack and vehicle

Abstract

This application relates to the technical field of battery packs, and specifically proposes a battery pack and carrier. The battery pack includes a frame, a cell group, and a beam. The cell group is disposed within the frame and includes multiple cell rows arranged side by side along a second direction. Each cell row includes multiple cells arranged along a first direction. The number of cell rows is odd, and at least two adjacent cell rows constitute a cell row set. Two adjacent cells in the cell row set along the second direction are electrically connected. The cell row includes a first cell row, which is adjacent to the cell row set. The beam is disposed within the frame and separates the cell row set from the first cell row. In this application, the beam separates the first cell row and the cell row set. When a cell leaks electrolyte, the beam can block the electrolyte flow, preventing two adjacent cells with a large voltage difference in the first cell row and the cell row set from breaking down due to electrolyte conduction, thereby ensuring the safety of the battery pack.

Description

Technical Field

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

[0002] In some battery packs, multiple cells are connected in series and lead out the total positive and negative terminals. When the number of cell columns is odd, and while ensuring that the total positive and negative terminals are led out on the same side of the battery pack, it is necessary to connect the adjacent cells between at least two adjacent cell columns.

[0003] However, the above arrangement will result in a large voltage difference between the two integrated cell rows and some adjacent cells in the adjacent cell rows. When a cell leaks, the two cells with a large voltage difference are prone to breakdown when the electrolyte is conducting, which may cause danger. 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, which includes a frame, a cell assembly, and a beam. The cell assembly is disposed within the frame and has a positive terminal and a negative terminal extending from the same side along a first direction, and includes multiple cell columns arranged side by side along a second direction. Each cell column includes multiple cells arranged along the first direction. The number of cell columns is odd, and at least two adjacent cell columns constitute a cell column set. Two adjacent cells in the cell column set along the second direction are electrically connected. The cell column includes a first cell column, which is arranged adjacent to the cell column set. The beam is disposed within the frame and separates the cell column set from the first cell column. The first direction and the second direction are perpendicular to each other.

[0006] Secondly, this application proposes a vehicle that includes the battery pack of the first aspect.

[0007] The technical solution proposed in this application has at least the following technical effects:

[0008] In the above scheme, the beam separates the first cell row and the cell row assembly. When a cell leaks electrolyte, the beam can block the flow of electrolyte, preventing two adjacent cells with large voltage differences in the first cell row and the cell row assembly from breaking down due to electrolyte conduction, thereby ensuring the safety of the battery pack. In addition, the beam can also increase the strength of the frame and ensure the structural stability of the battery pack. Attached Figure Description

[0009] 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.

[0010] Specifically, the annotations for the accompanying drawings are as follows:

[0011] Figure 1 This is a schematic diagram of the structure of the battery pack described in some embodiments of this application;

[0012] Figure 2 This is a schematic diagram of the frame structure described in some embodiments of this application.

[0013] Specifically, the annotations for the figure marks in the instruction manual are as follows:

[0014] 10. Frame; 20. Cell array; 201. Cell array set; 202. First cell array; 203. Positive terminal; 204. Negative terminal; 205. First cell; 206. Second cell; 207. Third cell; 30. Beam; X, First direction; Y, Second direction; Z, Third direction. Detailed Implementation

[0015] 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.

[0016] 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.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] 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.

[0021] Firstly, referring to Figure 1 This application proposes a battery pack comprising a frame 10, a cell assembly, and a beam 30. The cell assembly is disposed within the frame 10 and has a positive terminal 203 and a negative terminal 204 extending from the same side along a first direction X. It also includes multiple cell columns 20 arranged in parallel along a second direction Y. Each cell column 20 includes multiple cells arranged along the first direction X. The number of cell columns 20 is odd, and at least two adjacent cell columns 20 constitute a cell column set 201. Two adjacent cells in the cell column set 201 along the second direction Y are electrically connected. Each cell column 20 includes a first cell column 202, which is arranged adjacent to the cell column set 201. The beam 30 is disposed within the frame 10 and separated between the cell column set 201 and the first cell column 202. The first direction X and the second direction Y are perpendicular to each other.

[0022] In this embodiment, the beam 30 separates the first cell row 202 and the cell row set 201. When a cell leaks electrolyte, the beam 30 can block the flow of electrolyte, preventing two adjacent cells with a large voltage difference in the first cell row 202 and the cell row set 201 from breaking down due to electrolyte conduction, thereby ensuring the safety of the battery pack. In addition, the beam 30 can also increase the strength of the frame 10, ensuring the structural stability of the battery pack.

[0023] It should be noted that the positive terminal 203 and negative terminal 204 of the battery pack are led out from the same side to the electrical compartment. Compared with leading out the positive terminal 203 and negative terminal 204 from two different sides, there is no need to set up an additional wiring harness to connect to the same side, which improves space utilization.

[0024] In some embodiments, refer to Figure 1 Cell array 201 consists of two adjacent cell arrays 20 connected in an S-shape, and then connected in series with other cell arrays 20. The other cell arrays 20 besides cell array 20 consist of individual cells connected in series in a single cell array 20.

[0025] In some embodiments, the beam 30 is an insulating element and / or the beam 30 has an insulating layer at least on the side facing the battery cell.

[0026] In this embodiment, the beam 30 is insulated, which not only blocks the electrolyte but also increases the creepage distance between the first cell array 202 and the cell array assembly 201, ensuring that the two are not electrically connected through the beam 30 and guaranteeing the safety of the battery pack.

[0027] In some embodiments, refer to Figure 1 Along the second direction Y, the gap between the first cell array 202 and the cell array set 201 is d1, in mm, and satisfies 28≤d1≤38.

[0028] In this embodiment, the gap between the first cell array 202 and the cell array set 201 cannot be too small; otherwise, an excessively large voltage difference between them may cause a breakdown, posing a safety risk. Simultaneously, the gap cannot be too large either, otherwise it will occupy too much internal space, affecting the volumetric energy density of the battery pack. Therefore, d1 should be moderate; for example, d1 can take any one of 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, and 38, or a range between any two of these values.

[0029] In some embodiments, refer to Figure 2 Along the second direction Y, the thickness of beam 30 is d2 in mm, and satisfies 18≤d2≤23.

[0030] In this embodiment, the thickness d2 of the beam 30 cannot be too large, otherwise it will squeeze the battery cells on both sides; at the same time, d2 cannot be too small, otherwise its insulation effect will be affected, and the supporting strength of the frame 10 will also be reduced. Therefore, d2 should be moderate. For example, d2 can take any one of 18, 19, 20, 21, 22 and 23 or be in the range between any two of these values.

[0031] In some embodiments, along the second direction Y, the relationship between the gap d1 between the first cell array 202 and the cell array set 201 and the thickness d2 of the beam 30 satisfies 10≤d2-d1≤30, in mm.

[0032] In this embodiment, the values ​​of d2-d1 cannot be too small, otherwise the battery pack will be difficult to assemble and it will be difficult to guarantee the electrical clearance between the first cell column 202 and the cell column assembly 201; at the same time, the values ​​of d2-d1 cannot be too large, otherwise the space utilization rate will be low, affecting the volumetric energy density of the battery pack; therefore, d2-d1 should be moderate, for example, d2-d1 can take any one of 10, 15, 20, 25 and 30 or be in the range between any two of these values.

[0033] In some embodiments, refer to Figure 2 Along the third direction Z, the height of beam 30 is h in mm, and it satisfies 80≤h≤110; wherein, the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0034] In this embodiment, the height of the beam 30 cannot be too small; otherwise, if there is too much electrolyte, it will flow over the top of the beam 30, which may cause electrical conduction between the first cell array 202 and the cell array assembly 201, posing a safety risk. At the same time, the height of the beam 30 cannot be too large; otherwise, it may affect the assembly of other structures above the beam 30, such as interfering with the wiring harness above the beam 30. Therefore, h should be moderate. For example, h can take any one of 80, 90, 100, and 110 or be within the range of any two of these values.

[0035] In some embodiments, the number of cells in cell column 20 is n, and satisfies 2≤n≤60, where n is an integer.

[0036] In this embodiment, the number n of cells in each cell column 20 cannot be too large, otherwise it may cause an excessive voltage difference between the first cell column 202 and the cell column set 201. At the same time, n cannot be too small, otherwise it may cause insufficient power demand. Therefore, n should be moderate. For example, n can take any value of 2, 10, 20, 30, 40, 50 and 60 or be in the range between any two of these values, and n is an integer.

[0037] In some embodiments, refer to Figure 1 The positive terminal 203 or the negative terminal 204 is drawn out from the cell array 201, and the positive terminal 203 and the negative terminal 204 are distributed on both sides of the beam 30 along the second direction Y.

[0038] In this embodiment, as Figure 1 As shown, the negative terminal 204 is led out from the first cell 205, which is located on the side of the cell array 201 closer to the beam 30. Figure 1The dotted line in the diagram can be regarded as the conductive path of the battery pack. That is, the negative terminal 204 led out from the first cell 205 is one end of the conductive path of the battery pack, and the positive terminal 203 is the other end of the conductive path. The positive terminal 203 and the negative terminal 204 are distributed on both sides of the beam 30 to meet the creepage distance requirements and avoid breakdown and short circuit.

[0039] It should be noted that, as Figure 1 As shown, the second battery cell 206, which is adjacent to the first battery cell 205, is located on the other side of the beam 30. It should be understood that the distance between the first battery cell 205 and the second battery cell 206 is relatively close, and the voltage difference between the two is relatively high. Therefore, the beam 30 is required to separate them to prevent them from being electrically connected through the electrolyte.

[0040] Reference Figure 1 In the cell array 201, the third cell 207, which is adjacent to the first cell 205, is located on the side away from the beam 30. Of course, in some embodiments not shown in the figure, the negative terminal 204 can also be led out from the third cell 207, which is also a desirable implementation.

[0041] In some embodiments, refer to Figure 1 At least one cell column 20 is provided between the positive terminal 203 and the negative terminal 204.

[0042] In this embodiment, the distance between the positive terminal 203 and the negative terminal 204 is set to be as large as possible, with at least one cell array 20 between them, to meet the creepage distance requirement and avoid breakdown and short circuit.

[0043] In some embodiments, refer to Figure 1 Along the second direction Y, the cell array 201 is composed of two adjacent cell arrays 20 located at one end of the cell group. In this embodiment, one implementation of the cell array 201's location is provided, wherein one beam 30 is provided; of course, other implementations are also possible. For example, in some embodiments not shown in the figures, along the second direction Y, the cell array 201 is composed of two adjacent cell arrays 20 located in the middle of the cell group. Optionally, the number of beams 30 is at least two, that is, beams 30 are provided at least at both ends of the cell array 201 along the second direction Y.

[0044] Secondly, this application proposes a vehicle that includes the battery pack of the first aspect. Therefore, the vehicle of the second aspect possesses all the technical effects of the battery pack of the first aspect, the specific technical effects of which will not be elaborated further.

[0045] Optionally, the vehicle may be a hybrid vehicle, a new energy vehicle, or a flying car.

[0046] It should be noted that the battery pack in this embodiment may also include other components, such as an exhaust system, a battery protection board, etc. Other components will not be described in detail here.

[0047] In particular, the term "and / or" in this application should be understood as follows:

[0048] 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.

[0049] 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;

[0050] Furthermore, the character " / " in this application indicates that the objects before and after it are in an "or" relationship.

[0051] 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 by, include: Frame (10); A battery cell assembly is disposed within the frame (10) and has a positive terminal (203) and a negative terminal (204) extending from the same side along a first direction (X), and includes a plurality of battery cell columns (20) arranged side by side along a second direction (Y). Each battery cell column (20) includes a plurality of battery cells arranged along the first direction (X). The number of battery cell columns (20) is odd, and at least two adjacent battery cell columns (20) constitute a battery cell column set (201). Two adjacent battery cells in the battery cell column set (201) along the second direction (Y) are electrically connected. Each battery cell column (20) includes a first battery cell column (202), which is arranged adjacent to the battery cell column set (201). A beam (30) is disposed within the frame (10) and separated between the battery cell array (201) and the first battery cell array (202); Wherein, the first direction (X) and the second direction (Y) are perpendicular to each other.

2. The battery pack of claim 1, wherein, The beam (30) is an insulating component and / or the beam (30) has an insulating layer on at least the side facing the battery cell.

3. The battery pack according to claim 1, characterized in that, Along the second direction (Y), the gap between the first cell array (202) and the cell array set (201) is d1 in mm, and satisfies 28≤d1≤38.

4. The battery pack according to claim 3, characterized in that, Along the second direction (Y), the thickness of the beam (30) is d2 in mm, and satisfies 18≤d2≤23.

5. The battery pack according to claim 4, characterized in that, Along the second direction (Y), the relationship between the gap d1 between the first cell array (202) and the cell array set (201) and the thickness d2 of the beam (30) satisfies 10≤d2-d1≤30, in mm.

6. The battery pack according to claim 1, characterized in that, Along the third direction (Z), the height of the beam (30) is h, in mm, and satisfies 80≤h≤110; The first direction (X), the second direction (Y), and the third direction (Z) are perpendicular to each other.

7. The battery pack according to claim 1, characterized in that, The number of battery cells in the battery cell column (20) is n, and satisfies 2≤n≤60, where n is an integer.

8. The battery pack according to any one of claims 1 to 7, characterized in that, The positive terminal (203) or the negative terminal (204) is drawn from the cell array (201), and the positive terminal (203) and the negative terminal (204) are distributed on both sides of the beam (30) along the second direction (Y).

9. The battery pack according to claim 8, characterized in that, At least one of the cell rows (20) is provided between the positive terminal (203) and the negative terminal (204).

10. The battery pack according to claim 1, characterized in that, Along the second direction (Y), the cell array (201) is composed of two adjacent cell arrays (20) located at one end of the cell group.

11. The battery pack according to claim 1, characterized in that, Along the second direction (Y), the cell array (201) is composed of two adjacent cell arrays (20) located in the middle of the cell group.

12. The battery pack according to claim 11, characterized in that, The number of beams (30) is at least two.

13. A vehicle, characterized in that, Includes the battery pack as described in any one of claims 1 to 12.

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