Battery pack

Abstract

The utility model relates to the technical field of energy storage batteries, and discloses a battery pack, which comprises a shell, a battery pack and a battery pack, the partition plate is arranged in the shell and divides the mounting cavity into a first cavity body and a second cavity body; the plurality of battery cells are arranged in the first cavity; the boosting module is arranged in the second cavity; and the radiator is arranged in the second cavity, and the radiator and the shell are integrally formed. The radiator and the shell are integrally formed, the boosting module and the radiator are both arranged in the second cavity, the battery cell is arranged in the first cavity, and an opening for mounting parts does not need to be formed in the cavity wall of the mounting cavity, so that electromagnetic radiation generated in the two cavities is not easy to leak; the electromagnetic compatibility and the air tightness of the battery pack are further improved; the battery cell is arranged in the first cavity, the boosting module is arranged in the second cavity, heat generated in the using process of the boosting module cannot be transmitted into the first cavity, the performance of the battery cell cannot be affected, and then the service life of the battery cell can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage batteries, in particular to a battery pack. Background Art

[0002] Most battery packs in the prior art are composed of multiple battery cells 01, a sheet metal box 02, a boost module 03 and a radiator 04, and are used to provide power for the product.

[0003] In order to prevent the battery cells 01 from bulging and expanding, the battery cells 01 are first arranged in sequence during assembly, and the battery cells 01 are extruded using an extrusion tool, and then fixed into a battery cell module using end plates 05, cable ties 06 and fasteners, and the fixed battery cell module is placed in the sheet metal box 02; a boost module 03 is also installed in the sheet metal box 02 for connecting with the battery cells 01; an opening is provided on one side of the sheet metal box 02, and the boost module 03 is located on the inner side of the opening, and the radiator 04 is installed on the outer side of the opening, with the fins of the radiator 04 facing outwards, and the boost module 03 is tightly installed on the radiator 04, and a sealing gasket 07 is used to seal the radiator 04 and the sheet metal box 02. However, this assembly method has the following disadvantages:

[0004] If the sealing gasket 07 is of poor quality or is used for a long time, it will cause the risk of failure; secondly, due to the setting of the sealing gasket 07, the radiator 04 and the sheet metal box 02 are not in direct contact, resulting in a decrease in the electromagnetic compatibility performance of the battery pack, and electromagnetic energy can leak from the connection between the radiator 04 and the sheet metal box 02; and if a special conductive sealing gasket 07 is used for sealing, the cost will increase. Utility Model Content

[0005] In view of this, the utility model provides a battery pack to solve the problem that an opening is required in a box of the battery pack, resulting in poor electromagnetic compatibility performance.

[0006] The utility model provides a battery pack, comprising:

[0007] A housing including a mounting cavity;

[0008] A partition, disposed in the housing, the partition dividing the installation cavity into a first cavity and a second cavity;

[0009] A plurality of battery cells are disposed in the first cavity;

[0010] A boost module is disposed in the second cavity;

[0011] The heat sink is disposed in the second cavity and is integrally formed with the shell.

[0012] Beneficial effects: By forming the radiator and the shell as one piece, and arranging the boost module and the radiator in the second cavity, and the battery cell in the first cavity, there is no need to open an opening on the cavity wall of the installation cavity for the installation of components, so the electromagnetic radiation generated in the two cavities is not easy to leak, thereby improving the electromagnetic compatibility and air tightness of the battery pack; by arranging the battery cell in the first cavity and the boost module in the second cavity, the heat generated by the boost module during use cannot be transferred to the first cavity, will not affect the performance of the battery cell, thereby increasing the service life of the battery cell.

[0013] In an optional embodiment, the partition is integrally formed with the shell.

[0014] Beneficial effect: By integrally molding the partition and the shell, the air tightness of the shell and the connection reliability between the partition and the shell can be improved.

[0015] In an optional embodiment, a heat insulation device is provided on a side of the partition close to the boost module.

[0016] Beneficial effect: By providing a heat insulation device, it is possible to further prevent the heat generated by the boost module from being transferred to the first cavity, thereby affecting the service life of the battery cell.

[0017] In an optional implementation, the housing is made of aluminum; and / or the boost module is arranged close to the radiator.

[0018] Beneficial effects: The shell is made of aluminum, which makes it easy to form the partition and the shell in one piece; the boost module is set close to the radiator, and there is no need to open an opening in the installation cavity to install the radiator, which does not affect the air tightness of the shell and there is no risk of electromagnetic leakage.

[0019] In an optional embodiment, the plurality of battery cells are arranged along the length direction of the first cavity, and in the width direction, the width of the first cavity is adapted to the width of the battery cells.

[0020] Beneficial effect: By placing the battery cell directly in the first cavity, the cavity wall of the first cavity can limit the battery cell, which makes assembly simple and eliminates the need for multiple end plates, cable ties and fasteners, thereby reducing production costs, saving assembly steps, and improving assembly efficiency.

[0021] In an optional embodiment, the battery pack includes:

[0022] A fixing member, fixed in the first cavity;

[0023] In the length direction, one side of the battery core close to the cavity wall of the first cavity abuts against the cavity wall of the first cavity, and the other side of the battery core away from the cavity wall of the first cavity abuts against the fixing member.

[0024] In an optional embodiment, a relief structure is provided on a cavity wall of the first cavity away from the battery core, and the relief structure is suitable for an extrusion tool to extrude the battery core through the fixing member.

[0025] Beneficial effect: By setting the fixing parts and the avoidance structure, the battery cell can be squeezed by the squeezing tool, so that the battery cell is in a squeezed state, preventing the battery cell from bulging and expanding after being used for a period of time, thereby increasing the service life of the battery cell.

[0026] In an optional embodiment, the battery pack includes:

[0027] A first cover body, fixedly connected to a side of the first cavity away from the partition;

[0028] The first cover body is provided with a docking structure, which is correspondingly matched and connected with the avoidance structure.

[0029] Beneficial effect: By providing the first cover body and the docking structure, the first cavity can be sealed to prevent electromagnetic leakage.

[0030] In an optional implementation, the avoidance structure is an avoidance groove, and the docking structure is a protrusion.

[0031] In an optional embodiment, the battery pack includes:

[0032] A collection board is disposed above the battery cell, and the collection board is electrically connected to the battery cell;

[0033] and / or, a BMS board, disposed in the second cavity, the BMS board being electrically connected to the acquisition board and the boost module;

[0034] And / or, a second cover is fixedly connected to a side of the second cavity away from the partition.

[0035] Beneficial effects: By setting up the acquisition board and the BMS board, the state of the battery cell can be monitored to prevent the battery cell from being overcharged and over-discharged, thereby extending the service life of the battery cell; the second cover body can seal the second cavity to prevent electromagnetic leakage.

[0036] In an optional embodiment, a through hole is provided on the partition, and the through hole is suitable for passing a connection line between the acquisition board and the BMS board.

[0037] Beneficial effect: By providing a through hole on the partition to connect the connection line between the acquisition board and the BMS board, it is convenient to seal the shell, improve the air tightness of the shell, and prevent electromagnetic leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 An exploded diagram of a battery pack in the prior art;

[0040] Figure 2 A three-dimensional diagram of a battery pack according to an embodiment of the present utility model;

[0041] Figure 3 An exploded view of the first cavity of an embodiment of the utility model;

[0042] Figure 4 This is an exploded view of the second cavity of an embodiment of the utility model.

[0043] Description of reference numerals:

[0044] 01. Battery cell; 02. Sheet metal box; 03. Boost module; 04. Radiator; 05. End plate; 06. Cable tie; 07. Sealing gasket;

[0045] 1. Shell; 11. First cavity; 12. Second cavity; 13. Avoidance groove; 2. Partition; 21. Through hole; 3. Battery cell; 4. Boost module; 5. Radiator; 6. Fixing piece; 7. First cover; 71. Protrusion; 8. Collection board; 9. BMS board; 10. Second cover. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0047] Combine the following Figures 2 to 4 , describing an embodiment of the utility model.

[0048] According to an embodiment of the utility model, a battery pack is provided, comprising: a shell 1, comprising an installation cavity; a partition 2, arranged in the shell 1, the partition 2 divides the installation cavity into a first cavity 11 and a second cavity 12; a plurality of battery cells 3, arranged in the first cavity 11; a boost module 4, arranged in the second cavity 12; a radiator 5, arranged in the second cavity 12, and integrally formed with the shell 1.

[0049] By forming the radiator 5 and the shell 1 as one piece, and arranging the boost module 4 and the radiator 5 in the second cavity 12, and the battery cell 3 in the first cavity 11, there is no need to open an opening on the cavity wall of the installation cavity for the installation of components, so the electromagnetic radiation generated in the two cavities is not easy to leak, thereby improving the electromagnetic compatibility and air tightness of the battery pack; by arranging the battery cell 3 in the first cavity 11 and the boost module 4 in the second cavity 12, the heat generated by the boost module 4 during use cannot be transferred to the first cavity 11, will not affect the performance of the battery cell 3, thereby can improve the service life of the battery cell 3.

[0050] Specifically, the heat sink 5 and the housing 1 are integrally formed in the second cavity 12 by injection molding. As a changeable implementation, the heat sink 5 can also be welded in the second cavity 12.

[0051] The partition 2 in this embodiment is formed integrally with the shell 1; further, the shell 1 is made of aluminum. The shell 1 is made of aluminum, which facilitates the integral forming of the partition 2 and the shell 1, thereby improving the airtightness of the shell 1 and the connection reliability of the partition 2 and the shell 1. As a convertible embodiment, the shell 1 may be made of sheet metal, and the partition 2 may be welded to the shell 1, or the partition 2 may be separately provided from the shell 1. As a convertible embodiment, the shell 1 may include two sub-shells, each of which constitutes a separate box body, each of which has a separate installation cavity, and the partition 2 may be the bottom plate or top plate of one of the boxes.

[0052] In this embodiment, a heat insulating device is provided on the side of the partition 2 close to the boost module 4. Specifically, the heat insulating device is a heat insulating pad, which is pasted and arranged on the side of the partition 2 located in the second cavity 12. By providing a heat insulating device, it is possible to further prevent the heat generated by the boost module 4 from being transferred to the first cavity 11, thereby affecting the service life of the battery cell 3. As a convertible embodiment, the thickness of the partition 2 may be relatively thick, and the heat is not easily transferred, or the partition 2 may be made of a material with poor thermal conductivity.

[0053] The partition 2 in this embodiment divides the installation cavity of the housing 1 into a first cavity 11 and a second cavity 12 arranged vertically. As a convertible embodiment, the partition 2 may also divide the installation cavity of the housing 1 into a first cavity 11 and a second cavity 12 arranged horizontally.

[0054] like Figure 4 As shown, the boost module 4 is arranged close to the radiator 5. By arranging the boost module 4 close to the radiator 5, there is no need to open an opening in the installation cavity to install the radiator 5, thereby not affecting the airtightness of the housing 1 and eliminating the risk of electromagnetic leakage. As a convertible embodiment, the boost module 4 may not be arranged close to the radiator 5, but multiple radiators 5 may be arranged around the boost module 4.

[0055] like Figure 3 As shown, the plurality of battery cells 3 are arranged along the length direction of the first cavity 11, and in the width direction, the width of the first cavity 11 matches the width of the battery cells 3. Figure 3 The width direction of the first cavity 11 is along the lower right inclined direction. Figure 3 By placing the battery cell 3 directly in the first cavity 11, the cavity wall of the first cavity 11 can limit the battery cell 3, which is simple to assemble without using multiple end plates, cable ties and fasteners, reducing production costs, saving assembly steps, and thus improving assembly efficiency.

[0056] like Figure 3 As shown, the battery pack includes: a fixing member 6 fixed in the first cavity 11; in the length direction, one side of the battery cell 3 close to the cavity wall of the first cavity 11 abuts against the cavity wall of the first cavity 11, and the other side of the battery cell 3 away from the cavity wall of the first cavity 11 abuts against the fixing member 6. Further, a avoidance structure is provided on the cavity wall of the first cavity 11 away from the battery cell 3, and the avoidance structure is suitable for the extrusion tool to squeeze the battery cell 3 through the fixing member 6. By providing the fixing member 6 and the avoidance structure, the battery cell 3 can be squeezed by the extrusion tool, so that the battery cell 3 is in a squeezed state, preventing the battery cell 3 from bulging and expanding after being used for a period of time, thereby increasing the service life of the battery cell 3. As a convertible embodiment, the avoidance structure may not be provided, and multiple fixing members 6 may be provided in the first cavity 11 or the fixing member 6 may be movable in the width direction, thereby squeezing the battery cell 3.

[0057] like Figure 3 As shown, the battery pack in this embodiment includes: a first cover body 7, fixedly connected to the side of the first cavity 11 away from the partition 2; a docking structure is provided on the first cover body 7, which is correspondingly connected with the avoidance structure. Among them, the avoidance structure is the avoidance groove 13, and the docking structure is the protrusion 71. By providing the first cover body 7 and the docking structure, the first cavity 11 can be sealed to prevent electromagnetic leakage. As a convertible embodiment, it is also possible that the docking structure is not provided on the first cover body 7, and the first cover body 7 is completely covered on the first cavity 11.

[0058] like Figure 4As shown, the battery pack in this embodiment includes: a collection board 8, which is arranged above the battery cell 3, and the collection board 8 is electrically connected to the battery cell 3; a BMS (Battery Management System) board 9, which is arranged in the second cavity 12, and the BMS board 9 is electrically connected to the collection board 8 and the boost module 4; a second cover 10, which is fixedly connected to the side of the second cavity 12 away from the partition 2. By arranging the collection board 8 and the BMS board 9, the state of the battery cell 3 can be monitored to prevent the battery cell 3 from being overcharged and over-discharged, so as to extend the service life of the battery cell 3; the second cover 10 can seal the second cavity 12 to prevent electromagnetic leakage.

[0059] like Figure 4 As shown, a through hole 21 is provided on the partition 2, and the through hole 21 is suitable for passing the connection line between the acquisition board 8 and the BMS board 9. Specifically, two through holes 21 are provided. By providing a through hole 21 on the partition 2 to connect the connection line between the acquisition board 8 and the BMS board 9, it is convenient to seal the shell 1, improve the airtightness of the shell 1, and prevent electromagnetic leakage. As a convertible embodiment, it is also possible to set one or more through holes 21, or it can be specifically set according to the number and direction of the actually arranged connection lines, and no excessive restrictions are made here.

[0060] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A battery pack, characterized in that: include: A housing (1) comprising a mounting cavity; A partition (2) is arranged in the shell (1), and the partition (2) divides the installation cavity into a first cavity (11) and a second cavity (12); A plurality of battery cells (3) are arranged in the first cavity (11); A boost module (4) is arranged in the second cavity (12); The heat sink (5) is disposed in the second cavity (12) and is integrally formed with the housing (1).

2. The battery pack according to claim 1, characterized in that: The partition plate (2) and the shell (1) are integrally formed.

3. The battery pack according to claim 1, characterized in that: A heat insulation device is provided on the side of the partition (2) close to the boost module (4).

4. The battery pack according to claim 1, characterized in that: The housing (1) is made of aluminum; and / or the boost module (4) is arranged in close proximity to the radiator (5).

5. The battery pack according to any one of claims 1 to 4, characterized in that: The plurality of battery cells (3) are arranged along the length direction of the first cavity (11), and in the width direction, the width of the first cavity (11) is adapted to the width of the battery cells (3).

6. The battery pack according to claim 5, characterized in that: The battery pack comprises: A fixing member (6) fixed in the first cavity (11); In the length direction, one side of the battery core (3) close to the cavity wall of the first cavity (11) abuts against the cavity wall of the first cavity (11), and the other side of the battery core (3) away from the cavity wall of the first cavity (11) abuts against the fixing member (6).

7. The battery pack according to claim 6, characterized in that: An avoidance structure is provided on the cavity wall of the first cavity (11) away from the battery core (3), and the avoidance structure is suitable for an extrusion tool to extrude the battery core (3) through the fixing member (6).

8. The battery pack according to claim 7, characterized in that: The battery pack comprises: A first cover (7) fixedly connected to a side of the first cavity (11) away from the partition (2); The first cover body (7) is provided with a docking structure, which is correspondingly matched and connected with the avoidance structure.

9. The battery pack according to claim 8, characterized in that: The avoidance structure is an avoidance groove (13), and the docking structure is a protrusion (71).

10. The battery pack according to any one of claims 1 to 4, characterized in that: The battery pack comprises: A collection board (8) is arranged above the battery core (3), and the collection board (8) is electrically connected to the battery core (3); and / or, a BMS board (9) is disposed in the second cavity (12), and the BMS board (9) is electrically connected to the collection board (8) and the boost module (4); And / or, the second cover (10) is fixedly connected to a side of the second cavity (12) away from the partition (2).

11. The battery pack according to claim 10, characterized in that: The partition plate (2) is provided with a through hole (21), and the through hole (21) is suitable for passing a connection line between the collection board (8) and the BMS board (9).

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