Battery pack structure

Abstract

The utility model relates to a battery pack structure which comprises a battery pack, a CCS component and two side plates, the two side plates are respectively arranged on two sides of the battery pack, the battery pack structure further comprises an assembly frame, the assembly frame is arranged at one end of the battery pack, two sides of the assembly frame are respectively connected with the two side plates, and the CCS component is arranged on the assembly frame. According to the utility model, the assembly frame is connected with the two side plates, so that the battery pack is primarily locked, the structure is relatively compact, an end plate structure is omitted, a conventional module frame and a fixed point are canceled, and after battery cells are stacked into a group and a busbar of a CCS assembly is welded, an existing tool clamping jaw can be used for assisting the battery pack to enter a shell; the grouping efficiency is high, a large amount of space is saved, the weight of the battery pack is reduced, and the energy density of the battery pack is improved.

Description

Technical Field

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

[0002] As the demand for electricity in cars gradually increases, the traditional 12V battery system may not be able to meet the needs of high-power electronic devices and auxiliary electrical appliances. As a form of future energy efficiency improvement, the automotive 48V battery system is gradually becoming a new trend. The 48V battery system can provide greater power output capacity to meet the needs of these high-power devices, meet the increase in power demand, improve start-stop technology, achieve energy recovery and reuse, promote the development of mild electrification technology, and reduce weight and cost considerations. The development of the automotive 48V battery system helps to improve vehicle performance, save energy and reduce emissions, and enhance user experience.

[0003] However, in the existing 48V automotive battery technology, the end plates and side plates need to be welded together to form a frame to limit and fix the stacked battery packs. The battery packing efficiency is low, the overall battery integration is low, the volume is large and the structure is not compact, and the space occupied is relatively large. At present, when batteries pursue higher energy density and vehicles pursue lighter weight, a more compact structure will become the advantage of 48V batteries. Utility Model Content

[0004] Based on this, it is necessary to address the technical problems in the current automotive battery technology, such as low battery grouping efficiency, low overall battery integration, large size and non-compact structure, and large space occupied. The utility model provides a battery pack structure.

[0005] The utility model proposes a battery pack structure, comprising a battery pack, a CCS component and two side plates, wherein the two side plates are respectively arranged at two sides of the battery pack, and further comprises an assembly rack, which is arranged at one end of the battery pack and the two sides of the assembly rack are respectively connected to the two side plates, and the CCS component is installed on the assembly rack.

[0006] The utility model performs preliminary locking of the battery pack through the connection between the assembly frame and the two side plates, has a relatively compact structure, eliminates the end plate structure, cancels the conventional module frame and fixing points, and after the battery cells are stacked into groups and the busbar welding of the CCS component is completed, the existing tooling clamps can be used to assist the battery pack in entering the shell, which has high grouping efficiency, saves a lot of space, reduces the weight of the battery pack, and improves the energy density of the battery pack.

[0007] As a further improvement of the above solution of the utility model, the battery pack includes a plurality of buffer foams and a plurality of battery cells, the plurality of buffer foams are arranged side by side and at intervals, and a battery cell is provided between any two adjacent buffer foams.

[0008] As a further improvement of the above-mentioned scheme of the utility model, the battery pack structure also includes an outer shell and an upper cover; the top of the outer shell is open, and the battery pack, the assembly frame, the CCS component and the two side panels are assembled in the outer shell, and the bottom of the battery pack is bonded to the outer shell by a thermally conductive structural adhesive; the upper cover is cooperatively connected with the top of the outer shell to seal the outer shell.

[0009] As a further improvement of the above-mentioned scheme of the utility model, two groups of clips are provided on the side of the two side panels away from each other, the two groups of clips are arranged side by side on the side panels and each group of clips includes an upper clip platform and a lower clip platform, the upper clip platform is arranged at the upper part of the side panel and the lower clip platform is arranged at the lower part of the side panel; two card slots are provided on the opposite side walls of the outer shell, and the two card slots are respectively arranged one by one corresponding to the two card slots, and the upper card platform and the lower card platform of the card can be inserted into the card slot from the top opening of the card slot.

[0010] As a further improvement of the above scheme of the utility model, the battery pack also includes a PCB board, a positive copper bar and a negative copper bar, the positive copper bar and the negative copper bar are both arranged on the top of the multiple battery cells, the PCB board is arranged on the positive copper bar and the negative copper bar and an energy output port is arranged on the PCB board, and an opening for the energy output port to extend is opened on the upper cover.

[0011] As a further improvement of the above solution of the utility model, the battery pack structure is a 48V battery pack structure.

[0012] As a further improvement of the above solution of the utility model, flaps are provided on both sides of the assembly frame, and the two flaps are respectively connected to the two side panels through a plurality of press buckles.

[0013] As a further improvement of the above scheme of the utility model, a plurality of positive electrode connection holes arranged side by side and a plurality of negative electrode connection holes arranged side by side are penetrated through the assembly frame, the positive electrodes of the plurality of battery cells are respectively extended into the plurality of positive electrode connection holes, and the negative electrodes of the plurality of battery cells are respectively extended into the plurality of negative electrode connection holes; the plurality of bus bars of the CCS assembly are distributed in the plurality of positive electrode connection holes and the plurality of negative electrode connection holes and are welded and connected with the positive electrodes or negative electrodes of the battery cells.

[0014] As a further improvement of the above solution of the utility model, a weight-reducing hole is provided on the assembly frame.

[0015] As a further improvement of the above solution of the utility model, a connecting edge extending horizontally outward is integrally formed on the top of the shell, and the upper cover is connected to the connecting edge by bolts to seal the shell.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. The utility model preliminarily locks the battery pack through the connection between the assembly frame and the two side plates. The structure is relatively compact, the end plate structure is omitted, and the conventional module frame and fixing points are cancelled. After the battery cells are stacked into groups and the busbar welding of the CCS component is completed, the existing tooling clamps can be used to assist the battery pack to enter the shell. The grouping efficiency is high, and a large amount of space is saved, the weight of the battery pack is reduced, and the energy density of the battery pack is improved.

[0018] 2. The utility model realizes horizontal locking of the battery pack after it is inserted into the shell by cooperating between the clamps on the side panels and the clamping slots of the shell. The battery pack is connected to the shell by using thermally conductive structural adhesive, so that the battery pack can be limited and fastened. There is no need to weld the modules into groups and screw the modules to the box, which saves space and reduces the weight of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of a battery pack structure proposed in an embodiment of the utility model;

[0020] Figure 2 A partial structural schematic diagram of a battery pack structure proposed in an embodiment of the utility model;

[0021] Figure 3 for Figure 2 Exploded diagram of

[0022] Figure 4 for Figure 1 Schematic diagram of the structure of the middle shell;

[0023] Figure 5 for Figure 2 Schematic diagram of the structure of the middle side plate;

[0024] Figure 6 for Figure 2 The structural diagram of the middle assembly rack;

[0025] Figure 7 A schematic diagram of the assembly structure of a battery pack in a housing in a battery pack structure proposed in an embodiment of the utility model;

[0026] Figure 8 for Figure 1 Schematic diagram of the structure of the middle upper cover.

[0027] Figure numerals: 1. side panel; 2. assembly frame; 3. buffer foam; 4. battery cell; 5. shell; 6. upper cover; 7. upper card platform; 8. lower card platform; 9. card slot; 10. PCB board; 11. positive copper busbar; 12. negative copper busbar; 13. energy output port; 14. opening; 15. thermal conductive structural adhesive; 16. flap; 17. busbar. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] This embodiment aims to solve the technical problems in the current automotive battery technology, such as low battery grouping efficiency, low overall battery integration, large volume and non-compact structure, and large space occupied, and proposes a battery pack structure, especially a 48V battery pack structure. Figure 1-Figure 3 The 48V battery pack structure of this embodiment includes a battery pack, a CCS assembly, two side panels 1 and an assembly frame 2, and may also include a shell 5 and an upper cover 6.

[0030] Combination Figure 1 The top of the shell 5 is open, and two opposite side walls of the shell 5 are provided with two card slots 9. In this embodiment, the top of the shell 5 is also integrally formed with a connecting edge extending horizontally outward. The top of the outer wall of the shell 5 is integrally formed with a plurality of reinforcing ribs connected to the connecting edge. In this embodiment, the shell 5 is made of aluminum material, which has good thermal conductivity and can achieve the heat dissipation effect of natural cooling of the battery pack.

[0031] The battery pack is assembled in the housing 5 and the bottom of the battery pack is connected to the housing 5 through a heat-conducting structural adhesive 15. The battery pack includes a plurality of buffer foams 3, a plurality of battery cells 4, a PCB board 10, a positive copper bar 11 and a negative copper bar 12. The plurality of buffer foams 3 are arranged side by side and spaced apart, and a battery cell 4 is arranged between any two adjacent buffer foams 3. The positive copper bar 11 and the negative copper bar 12 are arranged on the top of the plurality of battery cells 4, the PCB board 10 is arranged on the positive copper bar 11 and the negative copper bar 12, and an energy output port 13 is arranged on the PCB board 10, and the electrical components are arranged on the upper part of the battery pack to facilitate energy output.

[0032] Two side panels 1 are arranged in the housing 5 and respectively arranged on both sides of the battery pack, and the two side panels 1 are respectively in contact with the two outermost buffer foams 3 in the battery pack. Two groups of card parts are arranged on the side away from each other of the two side panels 1, and the two groups of card parts are arranged side by side on the side panels 1 and each group of card parts includes an upper card platform 7 and a lower card platform 8. The upper card platform 7 is arranged on the upper part of the side panel 1 and the lower card platform 8 is arranged on the lower part of the side panel 1. The two card parts are respectively arranged in a one-to-one correspondence with the two card slots 9, and the upper card platform 7 and the lower card platform 8 of the card part can be inserted into the card slot 9 from the top opening 14 of the card slot 9. In this embodiment, the side panel 1 can be made of PA66+GF30 material. A plurality of assembly holes are provided on one side of the side panel 1 at intervals in the vertical direction.

[0033] The assembly rack 2 is arranged in the housing 5 and arranged at one end of the battery pack and at one end of the side panel 1 provided with the assembly hole 1. The side of the assembly rack 2 facing the battery pack is fitted with the battery pack, and a lap plate overlapped on the top of the battery pack is arranged on the top of the assembly rack 2. The assembly rack 2 is provided with a plurality of positive electrode connection holes arranged side by side and a plurality of negative electrode connection holes arranged side by side. The positive electrodes of the plurality of battery cells 4 are respectively extended into the plurality of positive electrode connection holes, and the negative electrodes of the plurality of battery cells 4 are respectively extended into the plurality of negative electrode connection holes. Both sides of the assembly rack 2 are integrally formed with a flap 16, and a plurality of assembly holes 2 are spaced apart in the vertical direction on the two flaps 16. The two flaps 16 are respectively arranged in a one-to-one correspondence with the two side panels 1, and the plurality of assembly holes 2 on the flap 16 are respectively arranged in a one-to-one correspondence with the plurality of assembly holes on the corresponding side panels 1. The corresponding assembly holes 2 and assembly holes 1 are connected by pressing buckles (not shown). In this embodiment, the assembly rack 2 can be made of PA66+GF30 material. The assembly frame 2 is provided with a plurality of weight-reducing holes.

[0034] The multiple busbars 17 of the CCS assembly are distributed in the multiple positive electrode connection holes and the multiple negative electrode connection holes and are welded to the positive electrode or the negative electrode of the battery cell 4 .

[0035] The upper cover 6 is arranged on the top of the housing 5 and connected to the connecting edge of the housing 5 by bolts to seal the housing 5 and restrict the battery pack assembled in the housing 5 in the Z direction. The upper cover 6 is provided with an opening 14 for the energy delivery port to extend out.

[0036] Through the above structural arrangement, after the battery cells 4 and the buffer foam 3 are stacked into groups, the side panels 1 and the assembly frame 2 are assembled, the stacked battery cells are squeezed by a clamping tool, and after the size is in compliance, the assembly frame 2 is connected to the two side panels 1 by a press buckle; then, the bus 17 is welded to the positive and negative electrodes of the battery cells 4 in the positive and negative electrode connection holes of the assembly frame 2; then, a thermal conductive structural adhesive 15 is applied to the bottom of the battery pack, and the battery pack and the side panel 1 are clamped by the existing tooling clamping jaws, and the clamping parts of the side panel 1 are aligned with the corresponding card slots 9. Through the guiding effect of the card slots 9, the battery pack is assembled into the shell, and the cooperation between the clamping parts and the card slots 9 realizes the horizontal locking of the battery pack; then, the positive copper bus 11, the negative copper bus 12 and the PCB board 10 are assembled, and finally, the upper cover 6 locking module is installed. The 48V battery pack structure of this embodiment omits the end plate structure, has a more compact structure, saves a lot of space, reduces the weight of the battery pack, and improves the energy density of the battery pack.

[0037] It should be noted that the above structural design of the 48V battery pack of this embodiment is also applicable to battery packs with other rated voltage values.

[0038] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0040] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0041] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A battery pack structure, comprising a battery pack, a CCS assembly and two side plates (1), wherein the two side plates (1) are respectively arranged on both sides of the battery pack, characterized in that: It also includes an assembly rack (2), which is arranged at one end of the battery pack and has two sides of which are respectively connected to two side panels (1), and a CCS component is mounted on the assembly rack (2).

2. The battery pack structure according to claim 1, characterized in that: The battery pack comprises a plurality of buffer foams (3) and a plurality of battery cells (4); the plurality of buffer foams (3) are arranged side by side and spaced apart, and a battery cell (4) is provided between any two adjacent buffer foams (3).

3. The battery pack structure according to claim 1, characterized in that: The battery pack structure further comprises an outer shell (5) and an upper cover (6); the top of the outer shell (5) is open, and the battery pack, the assembly frame (2), the CCS assembly and the two side panels (1) are assembled in the outer shell (5); the bottom of the battery pack is bonded to the outer shell (5) by a heat-conducting structural adhesive (15); the upper cover (6) is cooperatively connected to the top of the outer shell (5) to seal the outer shell (5).

4. The battery pack structure according to claim 3, characterized in that: Two groups of card members are arranged on the sides of the two side panels (1) away from each other. The two groups of card members are arranged side by side on the side panels (1) and each group of card members comprises an upper card platform (7) and a lower card platform (8). The upper card platform (7) is arranged on the upper part of the side panel (1) and the lower card platform (8) is arranged on the lower part of the side panel (1). Two opposite side walls of the housing (5) are arranged on two card slots (9). The two card members are arranged in one-to-one correspondence with the two card slots (9). The upper card platform (7) and the lower card platform (8) of the card member can be inserted into the card slot (9) from the top opening (14) of the card slot (9).

5. The battery pack structure according to claim 3, characterized in that: The battery pack further comprises a PCB board (10), a positive copper bar (11) and a negative copper bar (12); the positive copper bar (11) and the negative copper bar (12) are both arranged on the top of the plurality of battery cells (4); the PCB board (10) is arranged on the positive copper bar (11) and the negative copper bar (12); an energy output port (13) is arranged on the PCB board (10); and an opening (14) for the energy output port (13) to extend out is opened on the upper cover (6).

6. The battery pack structure according to any one of claims 1 to 5, characterized in that: The battery pack structure is a 48V battery pack structure.

7. The battery pack structure according to any one of claims 1 to 5, characterized in that: Flip plates (16) are provided on both sides of the assembly frame (2), and the two flip plates (16) are respectively connected to the two side plates (1) via a plurality of press buckles.

8. The battery pack structure according to any one of claims 1 to 5, characterized in that: The assembly frame (2) is provided with a plurality of positive electrode connection holes arranged side by side and a plurality of negative electrode connection holes arranged side by side, the positive electrodes of the plurality of battery cells (4) are respectively inserted into the plurality of positive electrode connection holes, and the negative electrodes of the plurality of battery cells (4) are respectively inserted into the plurality of negative electrode connection holes; the plurality of bus bars (17) of the CCS assembly are distributed in the plurality of positive electrode connection holes and the plurality of negative electrode connection holes and are welded to the positive electrodes or negative electrodes of the battery cells (4).

9. The battery pack structure according to any one of claims 1 to 5, characterized in that: The assembly frame (2) is provided with weight-reducing holes.

10. The battery pack structure according to any one of claims 1 to 5, characterized in that: A connecting edge extending horizontally outward is integrally formed at the top of the outer shell (5), and the upper cover (6) is connected to the connecting edge by bolts to seal the outer shell (5).

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