Battery pack and vehicle

Abstract

The utility model discloses a battery pack and a vehicle, and relates to the field of vehicle technology. The battery pack includes a shell, a battery module and an electrical component. The shell is provided with a storage space and a collapse space. In the front and rear direction of the battery pack, the collapse space is located beside the storage space. The battery module is arranged in the storage space. The battery module includes a plurality of battery cells and an output pole. The plurality of battery cells are connected. The output pole is led out from a side of the battery module close to the collapse space. The electrical component is arranged in the collapse space and is electrically connected to the output pole. The battery pack can increase the number of battery cells carried by the battery, extend the endurance of the electric vehicle, and improve the user experience.

Description

Technical Field

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

[0002] As the representative of green transportation, electric vehicles have the advantages of energy saving, environmental protection, and cleanliness compared with traditional fuel vehicles, reducing the environmental and economic costs of using vehicles. As the core energy storage component of electric vehicles, power batteries directly affect the endurance experience of electric vehicles.

[0003] In the prior art, the number of cells carried by a battery pack directly affects the battery life of an electric vehicle. However, a BDU (Battery Disconnect Unit) needs to be placed in front of the battery pack to ensure that the high-voltage line of the battery pack can be cut off when a cell is abnormal. Although this improves safety, it also occupies the storage space for the cells, making it difficult for the battery pack to carry more cells, resulting in insufficient battery life for the electric vehicle, affecting the user experience. Utility Model Content

[0004] The purpose of the utility model is to provide a battery pack and a vehicle, which can increase the number of cells carried by the battery, extend the endurance of the electric vehicle, and improve the user experience.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A battery pack, comprising:

[0007] A shell, wherein a housing space and a collapse space are provided in the shell, and in the front-rear direction of the battery pack, the collapse space is located beside the housing space;

[0008] A battery module is arranged in the accommodation space, the battery module comprises an output pole and a plurality of battery cells, the plurality of battery cells are electrically connected, and the output pole is electrically connected to the end battery cells;

[0009] An electrical component is disposed in the collapse space and electrically connected to the output pole.

[0010] As an optional solution for the above-mentioned battery pack, the battery pack also includes a system row, a partition beam is arranged in the shell, the partition beam is located between the accommodating space and the collapse space, a part of the system row is arranged on the partition beam and extends along the partition beam, one end of the system row is connected to the electrical component, and the other end of the system row is connected to the output pole.

[0011] As an optional solution for the above-mentioned battery pack, the output pole includes a first connection part, a transition part, and a second connection part which are connected in sequence, the first connection part is electrically connected to one of the battery cells in the battery module, and the second connection part is electrically connected to the system bus.

[0012] As an optional solution of the above battery pack, in a height direction of the battery pack, the heights of the first connecting portion and the second connecting portion are the same or different.

[0013] As an optional solution of the above-mentioned battery pack, the battery pack further includes a connecting bracket, the connecting bracket is arranged on the partition beam, and the system row and the output pole are both fixedly connected to the connecting bracket.

[0014] As an optional solution for the above-mentioned battery pack, the connecting bracket includes a base, the bottom surface of the base is provided with a clamping column, the partition beam is provided with a clamping hole, and the clamping column is inserted into the clamping hole and clamped and fixed.

[0015] As an optional solution of the above-mentioned battery pack, the base further includes an anti-foolproof structure, which ensures that the base can only allow the clamping column to be inserted into the clamping hole at a correct angle.

[0016] As an optional solution of the above-mentioned battery pack, the electrical component is spaced apart from the inner wall of the collapse space.

[0017] As an optional solution of the above-mentioned battery pack, the accommodating space includes a plurality of first sub-spaces, each of the first sub-spaces can accommodate the battery module, and each of the battery modules is electrically connected to the corresponding electrical component.

[0018] A vehicle comprises the battery pack.

[0019] Beneficial effects of the utility model:

[0020] The utility model provides a battery pack and a vehicle. In the battery pack, the housing of the battery pack is provided with a storage space for accommodating a battery module and a collapse space for collision collapse, and the collapse space is located beside the storage space. By arranging electrical components in the collapse space, space can be saved in the front and rear directions of the battery pack and used for arranging battery cells, thereby increasing the number of battery cells carried by the battery, extending the endurance of the electric vehicle, and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the battery pack provided by the utility model;

[0022] Figure 2 It is an exploded view of the connection bracket, output pole and system row provided by the utility model;

[0023] Figure 3 It is a structural schematic diagram of the connecting bracket provided by the utility model.

[0024] In the figure:

[0025] 1. Shell; 2. Battery module; 3. BDU module; 4. System row; 5. Connection bracket;

[0026] 11. Accommodation space; 12. Collapse space; 13. Separation beam; 14. Partition plate; 21. Cell; 22. Output pole; 51. Base; 52. Upper cover; 53. Snap-on column; 54. Anti-fool column;

[0027] 111, first subspace; 121, second subspace; 131, fixing groove; 141, wire groove; 221, first connecting part; 222, transition part; 223, second connecting part. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0029] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0030] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0031] Unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0032] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0033] As the representative of green transportation, electric vehicles have the advantages of energy saving, environmental protection, and cleanliness compared with traditional fuel vehicles, reducing the environmental and economic costs of using vehicles. As the core energy storage component of electric vehicles, power battery packs directly affect the endurance experience of electric vehicles.

[0034] This embodiment provides a vehicle, the vehicle includes a vehicle body and a battery pack, and the battery pack is arranged on the vehicle body. The battery pack is used to supply energy to the vehicle. Generally, the battery pack is arranged at the bottom of the vehicle and is located between the front axle and the rear axle.

[0035] like Figure 1 As shown, the battery pack includes a housing 1 and a battery module 2. The housing 1 is provided with a receiving space 11. The battery module 2 includes a plurality of battery cells 21, and the plurality of battery cells 21 are connected. The battery module 2 is provided in the receiving space 11. The housing 1 can protect the battery module 2, prevent the battery cells 21 from being damaged by external collisions and causing thermal runaway, and improve safety.

[0036] The connection between the multiple battery cells 21 includes series connection and parallel connection. In this embodiment, the battery pack includes multiple battery modules 2, the battery cells 21 in the same battery module 2 are connected in series, and different battery modules 2 are connected in parallel. In some embodiments, the battery cells 21 in the same battery module 2 can also be connected in parallel, and different battery modules 2 can also be connected in series, which needs to be determined according to the overall voltage and current parameters of the battery pack.

[0037] Since the vehicle may collide during use, in order to further improve the safety of the battery pack and prevent the battery pack from deforming due to collision and squeezing the internal battery cells 21 to cause thermal runaway, the housing 1 also includes a collapse space 12. In the front-to-back direction of the battery pack, the collapse space 12 is located beside the accommodating space 11. The front-to-back direction of the battery pack is also the front-to-back direction of the vehicle. Since the front and rear ends of the battery pack are at a large distance from the outer contour of the vehicle, the battery pack is usually not damaged by collisions in the front and rear of the vehicle. The side of the battery pack is the left or right side of the battery pack, which is at a small distance from the outer contour of the vehicle. A lateral collision can easily cause deformation of the battery pack. Therefore, the collapse space 12 provided beside the accommodating space 11 can prevent collisions from damaging the battery cells 21, thereby improving safety.

[0038] It is understandable that the number of cells 21 carried by the battery pack directly affects the battery life of the electric vehicle. However, the front side of the housing 1 needs to be filled with a variety of electrical components, which occupies the storage space 11 of the cells 21, making it difficult for the battery pack to carry more cells 21, resulting in insufficient battery life of the electric vehicle and affecting the user experience.

[0039] like Figure 1 and Figure 2 As shown, in order to solve the above problems, the battery module 2 also includes an output pole 22, which is electrically connected to the end battery cell, and the electrical component is arranged in the collapse space 12 and is electrically connected to the output pole 22.

[0040] When multiple cells 21 are connected in series, the end cell is the first cell 21 or the last cell 21, when multiple cells 21 are connected in parallel, any cell 21 is the end cell, and when multiple cells 21 are connected in series and in parallel, the end cell is the first cell 21 or the last cell 21 on the main line. In short, the output pole 22 is an electrode for electrically connecting the battery module 2 to other structures.

[0041] Since the collapse space 12 is located next to the accommodating space 11, by arranging electrical components in the collapse space 12, space can be saved in the front-to-rear direction of the battery pack and used for arranging the battery cells 21, thereby increasing the number of battery cells 21 carried by the battery, extending the battery life of the electric vehicle, and improving the user experience.

[0042] The size of the collapse space 12 needs to be related to the size of the battery module 2 in the left-right direction. Since the battery cell 21 is basically an existing mature product, the size of the battery cell 21 is fixed.

[0043] In this embodiment, the battery pack uses square battery cells. The square battery cells have three dimensions of length, width, and height. The square battery cells are arranged along the front-to-back direction of the battery pack, and the width direction of the square battery cells is consistent with the front-to-back direction of the battery pack so as to accommodate as many square battery cells as possible. At this time, only four square battery cells can be fully accommodated in the left-right direction of the battery pack, and the remaining space is used to set the collapse space 12.

[0044] In other embodiments, the battery pack may also use cylindrical cells. In this case, the arrangement of the cylindrical cells is relatively simple and can theoretically fill the space inside the shell 1. However, when designing the shell 1, it is also necessary to reserve the collapse space 12.

[0045] like Figure 1 As shown, the accommodation space 11 includes a plurality of first subspaces 111, each of which can accommodate a battery module 2, and each battery module 2 is electrically connected to a corresponding electrical component. By providing a plurality of battery modules 2, on the one hand, the energy carried by the battery pack as a whole can be increased, and the vehicle endurance can be improved, and on the other hand, the voltage and current of the battery pack can be adjusted as needed to meet the power demand of the vehicle.

[0046] In this embodiment, the electrical components include a BDU module 3 to ensure that the high-voltage circuit of the battery pack can be cut off when the battery cell 21 is abnormal, thereby ensuring the safety of the battery pack.

[0047] In some embodiments, the electrical components also include a controller, a voltage sensor, a current sensor, etc.

[0048] It is understandable that in order to prevent the electrical components from squeezing the battery core 21, the electrical components are spaced apart from the inner wall of the collapse space 12. At the same time, the electrical components generally have a low hardness. If the collapse space 12 is deformed, the electrical components will break and it will be difficult to continue squeezing inward.

[0049] like Figure 1 As shown, the collapse space 12 includes a plurality of second subspaces 121, and the plurality of second subspaces 121 are separated by partitions 14. Each second subspace 121 can accommodate electrical components, and the size of the second subspace 121 can be adjusted as required according to the size of the electrical components.

[0050] Furthermore, the partition plate 14 is provided with a wire groove 141 or a wire hole to lead out the cables of the electrical components.

[0051] like Figure 1 and Figure 2As shown, the battery pack also includes a system row 4, a partition beam 13 is arranged in the shell 1, the partition beam 13 is located between the accommodating space 11 and the collapse space 12, part of the system row 4 is arranged on the partition beam 13 and extends along the partition beam 13, one end of the system row 4 is connected to the electrical component, and the other end of the system row 4 is connected to the output pole 22. The partition beam 13 is used to divide the space with different functions in the shell 1, and to provide support for the shell 1 to improve the overall strength of the shell 1. The system row 4 is arranged and extends along the partition beam 13, and can provide support for the system row 4 through the partition beam 13, and there is no battery module 2 at the partition beam 13, so it can also effectively avoid the system row 4 and other conductive structures of the battery module 2 from abutting against each other to cause a malfunction.

[0052] The system bar 4 can be a copper bar. Since the output pole 22 is led out on the side of the battery module 2 close to the collapse space 12, the length of the system bar 4 can be reduced, thereby reducing the cost. In this embodiment, the system bar 4 can also be an aluminum bar to further reduce the cost.

[0053] Among them, the shell 1 includes multiple partition beams 13, and the accommodating space 11 and the collapse space 12 are separated by the partition beams 13. Inside the accommodating space 11, it can also be divided into multiple first sub-spaces 111 by the partition beams 13, which can not only avoid mutual interference between adjacent battery modules 2, but also further improve the overall strength of the shell 1.

[0054] In this embodiment, the output pole 22 includes a first connection portion 221, a transition portion 222, and a second connection portion 223 connected in sequence, the first connection portion 221 is electrically connected to a battery cell 21 in the battery module 2, and the second connection portion 223 is electrically connected to the system row 4. The angle and direction of the first connection portion 221 can match the top surface of an electrode of the battery cell 21 so that the two are in surface contact, thereby increasing the contact area and reducing the contact resistance; similarly, the second connection portion 223 can also be in surface contact with the system row 4.

[0055] It is understandable that since the top surface height of the electrode of the battery cell 21 is not necessarily the same as the height of the system row 4, the first connection portion 221 and the second connection portion 223 are not necessarily the same. At this time, the transition portion 222 can play the role of a transition connection, thereby offsetting the height difference between the first connection portion 221 and the second connection portion 223.

[0056] Specifically, in the height direction of the battery pack, the first connection portion 221 and the second connection portion 223 are at the same height, and the output pole 22 is a flat sheet. In this case, since the electrode of the battery cell 21 abuts against the lower surface of the output pole 22, the system row 4 can abut against the lower surface of the output pole 22 or the upper surface of the output pole 22, depending on the position of the system row 4.

[0057] In some embodiments, the first connection portion 221 and the second connection portion 223 have different heights, and the transition portion 222 achieves transition by bending or folding.

[0058] like Figure 1 to Figure 3 As shown, the battery pack further includes a connection bracket 5, which is disposed on the partition beam 13, and the system row 4 and the output pole 22 are both fixedly connected to the connection bracket 5. The connection bracket 5 can provide support and fixation for the system row 4 and the output pole 22, ensuring the stability and reliability of the connection between the system row 4 and the output pole 22.

[0059] The system row 4 and the output pole 22 are fixed to the base 51 by screws. It is worth noting that the screws pass through the system row 4 and the output pole 22 and are threadedly connected to the base 51 to ensure the stability of the system row 4 and the output pole 22.

[0060] like Figure 2 and Figure 3 As shown, the connecting bracket 5 includes a base 51, a clamping column 53 is provided on the bottom surface of the base 51, and a clamping hole is provided in the partition beam 13. The clamping column 53 is inserted into the clamping hole and clamped and fixed. The base 51 is clamped and fixed with the partition beam 13 through the clamping column 53, which simplifies the structure, improves the assembly efficiency, and reduces the cost compared with screw fixing.

[0061] In this embodiment, the partition beam 13 is provided with a fixing groove 131, and the base 51 is arranged in the fixing groove 131. The setting of the fixing groove 131 can provide initial positioning for the assembly of the base 51, and is convenient for operators to assemble the base 51. It is worth noting that the upper surface of the base 51 abuts against the output pole 22 or the system row 4, that is, the base 51 also has the function of filling the gap between the output pole 22 and the partition beam 13 or the gap between the system row 4 and the partition beam 13, thereby further improving the stability of the output pole 22 and the system row 4.

[0062] Furthermore, the base 51 also includes a foolproof structure, which ensures that the base 51 can only insert the clamping column 53 into the clamping hole at a correct angle. The foolproof structure can play a foolproof role, avoiding the inability to fix the output pole 22 and the system row 4 due to the wrong assembly angle when the base 51 is assembled on the partition beam 13, and repeated disassembly reduces efficiency.

[0063] like Figure 3 As shown, the base 51 is provided with two clamping columns 53, and the fool-proof structure includes an fool-proof column 54. At this time, as long as the fool-proof column 54 is not on the connecting line of the two clamping columns 53, one fool-proof column 54 cooperates with the two clamping columns 53 to play an fool-proof role.

[0064] In some embodiments, the base 51 is provided with a plurality of fool-proofing columns 54 , and the plurality of fool-proofing columns 54 can play a fool-proofing role. At this time, the number of the clamping columns 53 of the base 51 can be set according to demand.

[0065] In this embodiment, the connection bracket 5 further includes an upper cover 52, which is fixedly connected to the base 51, and the connection point between the system row 4 and the output pole 22 is located between the upper cover 52 and the base 51. The upper cover 52 can protect the connection point between the system row 4 and the output pole 22, and can also prevent dust from falling, thereby ensuring the reliability of the connection between the two.

[0066] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. A battery pack, characterized in that: include: A shell (1), wherein a housing space (11) and a collapse space (12) are provided in the shell (1), and in the front-rear direction of the battery pack, the collapse space (12) is located beside the housing space (11); A battery module (2) is arranged in the accommodating space (11), the battery module (2) comprising an output pole (22) and a plurality of battery cells (21), the plurality of battery cells (21) are electrically connected, and the output pole (22) is electrically connected to the end battery cells; An electrical component is disposed in the collapse space (12) and is electrically connected to the output pole (22).

2. The battery pack according to claim 1, characterized in that: The battery pack further comprises a system row (4); a partition beam (13) is arranged in the shell (1); the partition beam (13) is located between the accommodating space (11) and the collapsing space (12); a portion of the system row (4) is arranged on the partition beam (13) and extends along the partition beam (13); one end of the system row (4) is connected to the electrical element, and the other end of the system row (4) is connected to the output pole (22).

3. The battery pack according to claim 2, characterized in that: The output pole (22) comprises a first connection portion (221), a transition portion (222) and a second connection portion (223) which are connected in sequence, wherein the first connection portion (221) is electrically connected to one of the battery cells (21) in the battery module (2), and the second connection portion (223) is electrically connected to the system row (4).

4. The battery pack according to claim 3, characterized in that: In the height direction of the battery pack, the heights of the first connecting portion (221) and the second connecting portion (223) are the same or different.

5. The battery pack according to claim 2, characterized in that: The battery pack further comprises a connecting bracket (5), wherein the connecting bracket (5) is arranged on the partition beam (13), and the system row (4) and the output pole (22) are both fixedly connected to the connecting bracket (5).

6. The battery pack according to claim 5, characterized in that: The connecting bracket (5) comprises a base (51), the bottom surface of the base (51) is provided with a clamping column (53), the partition beam (13) is provided with a clamping hole, and the clamping column (53) is inserted into the clamping hole and clamped and fixed.

7. The battery pack according to claim 6, characterized in that: The base (51) further comprises an anti-foolproof structure, wherein the anti-foolproof structure ensures that the base (51) can only allow the clamping column (53) to be inserted into the clamping hole at a correct angle.

8. The battery pack according to claim 1, characterized in that: The electrical element is spaced apart from the inner wall of the collapse space (12).

9. The battery pack according to any one of claims 1 to 8, characterized in that: The accommodating space (11) comprises a plurality of first subspaces (111), each of the first subspaces (111) being capable of accommodating the battery module (2), and each of the battery modules (2) being electrically connected to the corresponding electrical element.

10. A vehicle, characterized in that: The vehicle includes the battery pack according to any one of claims 1 to 9.

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