Battery pack and battery box

Abstract

The utility model discloses a battery pack and a battery box. The battery pack comprises a water cooling plate, two first battery cell groups and a second battery cell group, the two first battery cell groups are arranged on the water cooling plate in parallel at intervals, all battery cells of the first battery cell groups are sequentially arranged in the thickness direction of the battery cells, and a gap cavity is formed between the two first battery cell groups. The second battery cell group is arranged in the gap cavity, and the thickness direction of each battery cell of the second battery cell group is perpendicular to the thickness direction of each battery cell of the first battery cell group. According to the battery pack disclosed by the invention, the second battery cell group is arranged in the gap cavity of the two first battery cell groups, and the thickness direction of each battery cell of the second battery cell group is perpendicular to that of each battery cell of the first battery cell group, so that the arrangement modes of the battery cells are enriched, and the residual space in the gap cavity is fully utilized; and meanwhile, the second battery cell group is positioned between the two first battery cell groups, and the second battery cell group can be extruded by the first battery cell groups, so that the extrusion requirements among the battery cells are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, and in particular to a battery pack and a battery box. Background Art

[0002] A battery pack typically has multiple cells and a water-cooling plate. The cells are arranged sequentially along the thickness of the cells, and each cell is placed on a water-cooling plate, which cools each cell. In the prior art, most cells are square cells, which have a bottom wall and side walls. The bottom wall is attached to the water-cooling plate, and the side walls include two large surfaces and two thickness end surfaces connecting the two large surfaces. Because the large surfaces are large, they are prone to expansion and deformation during the charge and discharge process. Therefore, in the prior art, the cells are typically arranged so that the large surfaces fit together. That is, the large surface of one of the two adjacent cells fits the large surface of the other, and the cells are arranged sequentially along the thickness of the cells. This allows the large surfaces of the cells to squeeze each other, reducing the risk of cell deformation.

[0003] However, within a limited space, the arrangement of battery cells in this manner is single, which limits the number of battery cells that can be placed within a fixed space. For example, if three groups of battery cells arranged in this manner are placed within the required space, the space will not be sufficient; if two groups of battery cells are placed in this manner, the remaining space will be wasted, the layout of the battery cells will be restricted, and the limited space will not be fully utilized. Utility Model Content

[0004] In order to solve one of the above technical problems, the utility model provides a battery pack and a battery box.

[0005] The utility model adopts the following technical solutions:

[0006] The first object of the present application is to provide a battery pack, comprising:

[0007] Water cooling plate;

[0008] Two first battery cell groups, the two first battery cell groups are arranged in parallel and spaced apart on the water cooling plate, the battery cells of the first battery cell groups are arranged in sequence along the thickness direction of the battery cells, and a gap cavity is formed between the two first battery cell groups;

[0009] The second battery cell group is arranged in the gap cavity, and the thickness direction of each battery cell in the second battery cell group is perpendicular to the thickness direction of each battery cell in the first battery cell group.

[0010] Optionally, the battery cell has two large surfaces and a thickness end surface connecting the two large surfaces;

[0011] The thickness end surfaces of the cells of the two first cell groups all abut against the large surfaces of the cells of the second cell group.

[0012] Optionally, the second battery cell group includes at least two columns of battery cells, and the battery cells in each column are arranged in sequence along the arrangement direction of the two first battery cell groups. The battery cells in the same column of the second battery cell group are arranged in sequence along the thickness direction of the battery cells in the first battery cell group, and the thickness end faces of two adjacent battery cells in the same column of the second battery cell group are in contact with each other.

[0013] Optionally, the second battery cell group includes a first column of battery cells and a second column of battery cells, and the first column of battery cells and the first battery cell group are connected via a jumper aluminum bar;

[0014] The second column of battery cells and another second battery cell group are connected via a jumper aluminum bar;

[0015] The two first battery cell groups are respectively connected to a first terminal seat and a second terminal seat;

[0016] The first column of battery cells is connected to a third terminal seat, and the second column of battery cells is connected to a fourth terminal seat.

[0017] Optionally, the third terminal seat and the fourth terminal seat are connected via a conductor, or the third terminal seat and the fourth terminal seat are isolated from each other.

[0018] Optionally, a first end plate is provided at each end of the second battery cell group, each battery cell of the second battery cell group is provided between the two first end plates, and a thickness direction of the first end plate is perpendicular to a thickness direction of the battery cells of the second battery cell group;

[0019] The third terminal seat and the fourth terminal seat are arranged on the first end plate.

[0020] Optionally, a second end plate is provided at each end of the first battery cell group, each battery cell of the first battery cell group is arranged between the two second end plates, and the second end plate and the first end plate are located in the same plane;

[0021] The first terminal seat or the second terminal seat is provided on the second end plate.

[0022] Optionally, the second battery cell group includes two side plates, the two side plates are respectively located on both sides of the second battery cell group, and the side plates are located between the first battery cell group and the second battery cell group;

[0023] The side panel comprises a main panel and bent panels located at both ends of the main panel;

[0024] The main board is attached to the large surface of the battery cells of the second battery cell group, and the bent plate is attached to the thickness end surfaces of the battery cells at both ends of the second battery cell group.

[0025] Optionally, both the first end plate and the second end plate are provided with longitudinal connecting holes;

[0026] The water cooling plate is provided with a threaded groove;

[0027] One end of the fastener passes through the longitudinal connecting hole and is connected to the thread groove, and the other end of the fastener is limited to the first end plate or the second end plate.

[0028] The second object of the present application is a battery box, comprising:

[0029] A box shell having a cavity and a plurality of support plates arranged in the cavity;

[0030] As for the battery pack mentioned above, the battery pack is mounted on the support plate.

[0031] By adopting the above technical solution, this application has the following beneficial effects:

[0032] The second cell group of the battery pack of the present application is arranged in the gap cavity between the two first cell groups, and the thickness direction of each cell in the second cell group is perpendicular to the thickness direction of each cell in the first cell group, which enriches the arrangement of the cells and makes full use of the remaining space in the gap cavity. At the same time, the second cell group is located between the two first cell groups, and the second cell group can be squeezed by the first cell group to ensure the squeezing requirements between the cells.

[0033] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings are part of this application and are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are only some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. In the drawings:

[0035] Figure 1 A schematic diagram of the structure of the battery pack provided in an embodiment of the present application;

[0036] Figure 2 A schematic diagram of the partial structure of a battery pack provided in an embodiment of the present application;

[0037] Figure 3 A schematic structural diagram of the second cell group of the battery pack provided in an embodiment of the present application.

[0038] In the figure: water-cooling plate 1, first battery cell group 2, second end plate 21, second battery cell group 3, first column of battery cells 31, second column of battery cells 32, first end plate 33, side plate 34, main board 341, bent plate 342, jumper aluminum bar 4, longitudinal connecting hole a, first terminal seat 5, second terminal seat 6, third terminal seat 7, fourth terminal seat 8.

[0039] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0041] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0042] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "mounted" and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on their specific circumstances. Example 1

[0043] See also Figures 1 to 3 As shown, the first embodiment of the present application provides a battery pack, comprising: a water-cooled plate 1, two first battery cell groups 2 and a second battery cell group 3. The two first battery cell groups 2 are arranged on the water-cooled plate 1 at intervals and in parallel, and the battery cells of the first battery cell group 2 are arranged in sequence along the thickness direction of the battery cells, and there is a gap cavity between the two first battery cell groups 2. The second battery cell group 3 is arranged in the gap cavity, and the thickness direction of each battery cell of the second battery cell group 3 is perpendicular to the thickness direction of each battery cell of the first battery cell group 2. The second battery cell group 3 of the battery pack of the present application is arranged in the gap cavity of the two first battery cell groups 2, and the thickness direction of each battery cell of the second battery cell group 3 is perpendicular to the thickness direction of each battery cell of the first battery cell group 2, which enriches the arrangement of the battery cells and makes full use of the remaining space in the gap cavity. At the same time, the second battery cell group 3 is located between the two first battery cell groups 2, and the second battery cell group 3 can be squeezed by the first battery cell group 2 to ensure the squeezing requirements between the battery cells.

[0044] For example, if three first cell groups 2 are placed in the space to accommodate the cells, the space is limited; if two first cell groups 2 are placed, some space will remain, which is not used properly. However, using the cell arrangement in the battery pack of this application, several second cells can be placed in the gap cavity between the two first cell groups 2. The gap cavity can accommodate the second cell group 3 arranged perpendicular to the first cell group 2, thus making proper use of the limited space.

[0045] The battery cell has two large surfaces and a thickness end surface connecting the two large surfaces. The thickness end surfaces of each battery cell in the two first battery cell groups 2 abut against the large surfaces of the battery cells in the second battery cell group 3. The arrangement direction of the first battery cell group 2 is perpendicular to the arrangement direction of the second battery cell group 3. The large surfaces of the battery cells in the second battery cell group 3 can be squeezed by the thickness end surfaces of each battery cell in the first battery cell group 2 to ensure the squeezing requirements of each battery cell.

[0046] In a possible embodiment, the second battery cell group 3 includes at least two columns of battery cells, and the battery cells in each column are arranged in sequence along the arrangement direction of the two first battery cell groups 2. The battery cells in the same column of the second battery cell group 3 are arranged in sequence along the thickness direction of the battery cells of the first battery cell group 2. The thickness end faces of two adjacent battery cells in the same column of the second battery cell group 3 are fitted together. The arrangement method of the second battery cell group 3 is different from that of the first battery cell group 2, which enriches the arrangement method of the battery cells and makes full use of the space.

[0047] The second cell group 3 includes a first column of cells 31 and a second column of cells 32. The first column of cells 31 and one of the first cell groups 2 are connected via a jumper aluminum bar 4. The second column of cells 32 and another of the second cell groups 3 are connected via a jumper aluminum bar 4. The two first cell groups 2 are respectively connected to a first terminal block 5 and a second terminal block 6. The first column of cells 31 is connected to a third terminal block 7, and the second column of cells 32 is connected to a fourth terminal block 8. The battery pack of the present application has two positive poles and two negative poles, which increases the connection method of the battery pack.

[0048] The third terminal block 7 and the fourth terminal block 8 are connected by a conductor, and the battery pack of the present application has one positive electrode and one negative electrode for external connection. Alternatively, the third terminal block 7 and the fourth terminal block 8 are isolated, and the battery pack of the present application has two positive electrodes and two negative electrodes, which increases the connection method, for example, it can be connected in series with other battery packs in the battery box.

[0049] In one possible embodiment, a first end plate 33 is provided at each end of the second cell group 3. Each cell of the second cell group 3 is disposed between the two first end plates 33. The thickness of the first end plates 33 is perpendicular to the thickness of the cells of the second cell group 3. The third terminal block 7 and the fourth terminal block 8 are provided on the first end plates 33. The two first end plates 33 clamp the second cell group 3, ensuring that the cells of the second cell group 3 are tightly arranged and the structure is not loose.

[0050] A second end plate 21 is provided at each end of the first cell group 2. Each cell of the first cell group 2 is arranged between the two second end plates 21. The second end plate 21 and the first end plate 33 are located in the same plane. The first terminal seat 5 or the second terminal seat 6 is provided on the second end plate 21. The two second end plates 21 are used to clamp the cells of the first cell group 2 so that the cells of the first cell group 2 are arranged tightly and the structure is not loose. The arrangement of the cells of the battery pack of the present application is reasonable, and the arranged structure is regular, usually a rectangular structure, and the structure is compact.

[0051] The second cell group 3 includes two side panels 34, which are located on either side of the second cell group 3 and between the first cell group 2 and the second cell group 3. The side panels 34 have a main panel 341 and bent panels 342 located at both ends of the main panel 341. The main panel 341 is attached to the large surface of the cells of the second cell group 3, and the bent panels 342 are attached to the thickness end surfaces of the cells at both ends of the second cell group 3. The two side panels 34 and the two first end panels 33 clamp the second cell group 3 from four sides, forming a compact integral structure for each cell in the second cell group 3.

[0052] In one possible embodiment, both the first end plate 33 and the second end plate 21 are provided with a longitudinal connection hole a, and the water-cooling plate is provided with a threaded groove. One end of a fastener (not shown) passes through the longitudinal connection hole a and connects to the threaded groove, while the other end of the fastener is secured to the first end plate 33 or the second end plate 21. The fastener can be a screw, the shank of which passes through the longitudinal connection hole a and is threadedly connected to the threaded groove. The cap of the screw is secured to the side of the first end plate 33 or the second end plate 21 facing away from the water-cooling plate, thereby securing the first end plate 33 and the second end plate 21 to the water-cooling plate. Example 2

[0053] This application also provides a battery box, comprising: a box shell (not shown) and a battery pack as described above, the box shell having a cavity and multiple support plates (not shown) disposed within the cavity. The battery pack is mounted on the support plates. When the third terminal block 7 and the fourth terminal block 8 of the battery pack are isolated, the battery pack has two positive electrodes and two negative electrodes, and can be connected in series with other battery packs in the battery box, enriching the connection methods of the battery packs.

[0054] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments using the above-mentioned technical content without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A battery pack, characterized in that: include: Water cooling plate; Two first battery cell groups, the two first battery cell groups are arranged in parallel and spaced apart on the water cooling plate, the battery cells of the first battery cell groups are arranged in sequence along the thickness direction of the battery cells, and a gap cavity is formed between the two first battery cell groups; The second battery cell group is arranged in the gap cavity, and the thickness direction of each battery cell in the second battery cell group is perpendicular to the thickness direction of each battery cell in the first battery cell group.

2. The battery pack according to claim 1, wherein: The battery core has two large surfaces and a thickness end surface connecting the two large surfaces; The thickness end surfaces of the cells of the two first cell groups all abut against the large surfaces of the cells of the second cell group.

3. The battery pack according to claim 2, wherein: The second battery cell group includes at least two columns of battery cells, and the battery cells in each column are arranged in sequence along the arrangement direction of the two first battery cell groups. The battery cells in the same column of the second battery cell group are arranged in sequence along the thickness direction of the battery cells in the first battery cell group, and the thickness end surfaces of two adjacent battery cells in the same column of the second battery cell group are in contact with each other.

4. The battery pack according to claim 3, wherein: The second battery cell group includes a first column of battery cells and a second column of battery cells, and the first column of battery cells and the first battery cell group are connected by a jumper aluminum bar; The second column of battery cells and another second battery cell group are connected via a jumper aluminum bar; The two first battery cell groups are respectively connected to a first terminal seat and a second terminal seat; The first column of battery cells is connected to a third terminal seat, and the second column of battery cells is connected to a fourth terminal seat.

5. The battery pack according to claim 4, characterized in that: The third terminal block and the fourth terminal block are connected via a conductor, or the third terminal block and the fourth terminal block are isolated from each other.

6. The battery pack according to claim 4, characterized in that: A first end plate is provided at each end of the second battery cell group, and each battery cell of the second battery cell group is provided between the two first end plates, and the thickness direction of the first end plate is perpendicular to the thickness direction of the battery cells of the second battery cell group; The third terminal seat and the fourth terminal seat are arranged on the first end plate.

7. The battery pack according to claim 6, characterized in that: The first battery cell group is provided with a second end plate at both ends, each battery cell of the first battery cell group is arranged between the two second end plates, and the second end plate and the first end plate are located in the same plane; The first terminal seat or the second terminal seat is provided on the second end plate.

8. The battery pack according to claim 7, characterized in that: The second battery cell group includes two side plates, the two side plates are respectively located on both sides of the second battery cell group, and the side plates are located between the first battery cell group and the second battery cell group; The side panel comprises a main panel and bent panels located at both ends of the main panel; The main board is attached to the large surface of the battery cells of the second battery cell group, and the bent plate is attached to the thickness end surfaces of the battery cells at both ends of the second battery cell group.

9. The battery pack according to claim 7, characterized in that: The first end plate and the second end plate are both provided with longitudinal connection holes; The water cooling plate is provided with a thread groove; One end of the fastener passes through the longitudinal connecting hole and is connected to the thread groove, and the other end of the fastener is limited to the first end plate or the second end plate.

10. A battery box, characterized in that: include: A box shell having a cavity and a plurality of support plates arranged in the cavity; The battery pack according to any one of claims 1 to 9, wherein the battery pack is mounted on the support plate.

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