High-energy-density battery pack

Abstract

The utility model relates to the technical field of batteries, in particular to a high-energy-density battery pack which comprises a shell, an upper cover plate and a lower cover plate are arranged on the upper portion and the lower portion of the shell respectively, liquid flow channels are formed in the upper cover plate and the lower cover plate respectively, corresponding installation grooves are formed in the two opposite side faces of the shell respectively, and the liquid flow channels are communicated with the installation grooves. Mounting grooves are formed in the upper cover plate and the lower cover plate, cooling fins are inserted into the mounting grooves, the cooling fins can abut against the side face of a battery cell in the shell, inserting grooves are formed in the upper cover plate and the lower cover plate, the cooling fins can be inserted into the inserting grooves, a liquid inlet pipe and a liquid outlet pipe are arranged on the opposite side faces of the upper cover plate respectively, and the structure of the lower cover plate is the same as that of the upper cover plate. The side surface of the battery cell is propped against the cooling fins, and the height of the cooling fins is greater than the depth of the shell, so that the upper ends and the lower ends of the cooling fins can be inserted into the slots in the upper cover plate and the lower cover plate, and heat generated by the battery cell main body can be conveniently guided into the liquid flow channels in the upper cover plate and the lower cover plate by the cooling fins.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, concretely is a kind of high energy density battery pack. BACKGROUND

[0002] The existing battery pack generally adopts liquid cooling mode, and the liquid cooling plate is generally located at the bottom or side of the battery, to adjust the temperature of the battery pack. However, such arrangement not only occupies the internal space of the battery pack, but also is time-consuming and laborious in assembly process.

[0003] The existing application No. CN202322628748.3 discloses a battery pack shell and a battery pack. The battery pack shell includes an upper shell (1) and a lower shell (2). The lower shell (2) has a receiving cavity, and the upper shell (1) covers the lower shell (2). A cooling channel (1a) is arranged in the wall of the upper shell (1), and the upper shell (1) has a water inlet (I) and a water outlet (O). The two ends of the cooling channel (1a) are in communication with the water inlet (I) and the water outlet (O). In the installed state, the inner side wall of the upper shell (1) is attached to the battery (01). The battery pack shell integrates the upper shell with the liquid cooling system, reduces the number of components and the assembly process, reduces the required height or width inside the battery pack, improves the space utilization, reduces the weight of the battery pack, improves the energy density, improves the rigidity of the upper shell, improves the natural frequency, reduces the vibration amplitude, and reduces the risk of liquid leakage when the battery pack is subjected to side or bottom impact or extrusion.

[0004] However, the above-mentioned patent can only cool the top of the battery pack, and the heat of the entire battery cannot be effectively dissipated, resulting in low efficiency. The existing liquid flow channel between the battery cells can effectively dissipate heat, but it will occupy the effective space inside the battery pack, reduce the number of battery cells installed, and thus reduce the energy density of the battery pack. Utility model content

[0005] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art, and to provide a high energy density battery pack. By arranging liquid flow channels and slots in the upper cover plate and the lower cover plate, and cooperating with the heat sinks inside the shell, the heat generated by the battery cells can be dissipated through the upper cover plate and the lower cover plate. The heat at both ends of the battery cell is dissipated, the side of the battery cell is in abutment with the heat sink, and the height of the heat sink is greater than the depth of the shell, so that the heat sink can be inserted into the slot in the upper cover plate and the lower cover plate. The heat generated by the battery cell body is guided into the liquid flow channel inside the upper cover plate and the lower cover plate, and the entire battery cell is cooled.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A high energy density battery pack, comprising a shell, the shell upper portion and lower portion are respectively provided with upper cover plate and lower cover plate, the upper cover plate and lower cover plate inside are provided with liquid flow channel, the opposite two sides of the shell are respectively provided with corresponding mounting groove, the mounting groove is inserted with fin, the fin can be with the side surface of the shell inside electric core abuts, the upper cover plate and lower cover plate are all provided with the insertion slot, the fin can be inserted into the insertion slot, the opposite side of the upper cover plate is respectively provided with liquid inlet pipe and liquid outlet pipe, the lower cover plate and the upper cover plate are same in structure.

[0008] Preferably, the side of the upper cover plate and the lower cover plate is provided with a limiting clamp, and the C-shaped clamp is installed between the corresponding limiting clamps of the upper cover plate and the lower cover plate.

[0009] Preferably, the upper cover plate and the lower cover plate are respectively spaced by a plurality of separate liquid flow channels through a partition plate, and the two ends of the upper cover plate and the lower cover plate are respectively provided with a liquid inlet pipe and a liquid outlet pipe.

[0010] Preferably, a plurality of separate liquid flow channels are respectively provided with a plurality of corresponding insertion slots.

[0011] Preferably, the upper cover plate and the lower cover plate are made of aluminum alloy material.

[0012] Preferably, the side of the upper cover plate and the lower cover plate abutting with the shell is respectively provided with a sealing gasket.

[0013] Preferably, the fin is made of aluminum alloy material, and the height of the fin is greater than the depth of the shell.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model discloses a simple structure, and the multiple groups of battery cells are installed between the adjacent two radiating fins respectively, and the side surface of the battery cell can abut against the radiating fin, and the upper cover plate and the lower cover plate abut against the upper and lower ends of the battery cell, because the upper cover plate and the lower cover plate have liquid flow channels inside, through the liquid inlet pipe and the liquid outlet pipe, the liquid flows in the liquid flow channel in the upper cover plate and the lower cover plate, the heat generated by the battery cell is conducted away by the upper cover plate and the lower cover plate, the side surface of the battery cell abuts against the radiating fin, and the height of the radiating fin is greater than the depth of the shell, so that the upper and lower ends of the radiating fin can be inserted into the insertion slot in the upper cover plate and the lower cover plate, the heat generated by the battery cell body is conducted to the liquid flow channel inside the upper cover plate and the lower cover plate by the radiating fin, the whole battery cell is cooled, the material of the radiating fin is aluminum alloy, the heat conduction efficiency of the radiating fin is effectively ensured, the cooling effect of the battery pack is greatly improved by the device, the safety of the battery pack is improved, the battery life is prolonged, the energy utilization efficiency is improved, the energy density design is supported, the system reliability is improved, and the regulations and standards are met.

[0016] 2. The device sets up a separate liquid flow channel, sets up an insertion slot in the separate liquid flow channel, inserts the corresponding radiating fin into the insertion slot, further improves the cooling efficiency, and the separate liquid flow channels are collected by the converging bin, so that the liquid can flow through the liquid inlet pipe and the liquid outlet pipe.

[0017] 3. The upper cover plate and the lower cover plate of the device are made of aluminum alloy, the aluminum alloy has high specific strength and rigidity, can bear large pressure and load, is not easy to deform or break during use, meets the requirements of the battery pack on structural strength, and can significantly reduce the overall weight of the battery pack compared with traditional steel materials, thereby improving the endurance and energy efficiency of new energy vehicles, in addition, the upper cover plate and the lower cover plate abut against the upper and lower ends of the battery cell, the aluminum alloy has excellent heat conduction performance, the heat generated inside the battery pack can be quickly conducted to the outside, the battery working temperature is effectively reduced, and the battery life is prolonged.

[0018] 4. The device uses a C-shaped clamp to clamp and lock two corresponding limiting clamps, avoids the upper cover plate or the lower cover plate from falling off and causing the battery cells to scatter, improves the assembly speed of the device through the cooperation of the limiting clamps and the C-shaped clamps, avoids using screws to install and fix the device for a long time, reduces the labor intensity of the operator, improves the assembly speed of the device, and the sealing gasket can effectively prevent external moisture, dust and other impurities from entering the battery pack, protects the battery system from pollution and corrosion, ensures the normal operation of the battery, fills the small gap between the cover plates through the sealing gasket, enhances the overall air tightness of the battery pack, prevents gas leakage, which is very important for the air pressure balance and safety inside the battery pack. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The overall structure of the utility model is shown Figure 1 ;

[0020] Figure 2 The installation position of the heat sink is shown

[0021] Figure 3 The sectional view of the upper cover plate is shown

[0022] Figure 4 The sectional view of the utility model is shown

[0023] In the figure: 1, the shell; 2, upper cover plate; 3, lower cover plate; 4, liquid inlet pipe; 5, liquid outlet pipe; 6, liquid flow passage; 7, partition; 8, insertion slot; 9, installation slot; 10, heat sink; 11, electric core; 12, convergence warehouse; 13, limit clamp; 14, C type clamp. DETAILED DESCRIPTION

[0024] The technical scheme in the embodiments of the utility model will be described clearly and completely in conjunction with the drawings of the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor belong to the protection scope of the utility model.

[0025] Embodiment one

[0026] A high-energy-density battery pack, the structure is shown as Figures 1-4 The upper cover plate 2 and the lower cover plate 3 are provided with liquid flow passages 6 inside, the opposite two sides of the shell 1 are respectively provided with corresponding installation slots 9, the heat sink 10 is inserted in the installation slot 9, the heat sink 10 can abut with the side surface of the electric core 11 inside the shell 1, the upper cover plate 2 and the lower cover plate 3 are provided with insertion slots 8, the heat sink 10 can be inserted into the insertion slot 8, the opposite sides of the upper cover plate 2 are respectively provided with liquid inlet pipe 4 and liquid outlet pipe 5, the lower cover plate 3 is same with the structure of the upper cover plate 2. The heat sink 10 is made of aluminum alloy material, the height of the heat sink 10 is greater than the depth of the shell 1.

[0027] Due to the fact that the opposite sides inside the shell 1 are respectively provided with mounting grooves 9, it is convenient to quickly insert the heat dissipation fins 10 into the mounting grooves 9, and then install the plurality of battery cells 11 between the adjacent two heat dissipation fins 10, so as to ensure that the side surface of the battery cell 11 can be in abutment with the heat dissipation fin 10, and the upper cover plate 2 and the lower cover plate 3 are in abutment with the upper and lower ends of the battery cell 11. Since the upper cover plate 2 and the lower cover plate 3 are both provided with liquid flow channels 6 inside, the liquid flow in the liquid flow channels 6 inside the upper cover plate 2 and the lower cover plate 3 is ensured through the liquid inlet pipe 4 and the liquid outlet pipe 5, and the heat generated by the battery cell 11 can be conducted away through the upper cover plate 2 and the lower cover plate 3. The side surface of the battery cell 11 is in abutment with the heat dissipation fin 10, and the height of the heat dissipation fin 10 is greater than the depth of the shell 1, so that the upper and lower ends of the heat dissipation fin 10 can be inserted into the insertion slot 8 in the upper cover plate 2 and the lower cover plate 3, and the heat generated by the battery cell 11 can be conducted to the liquid flow channels 6 inside the upper cover plate 2 and the lower cover plate 3 through the heat dissipation fin 10, so as to facilitate heat dissipation of the whole battery cell 11. Since the material of the heat dissipation fin 10 is aluminum alloy, the heat conduction efficiency of the heat dissipation fin 10 can be effectively ensured. Through the device, the heat dissipation effect of the battery pack can be greatly improved, which not only improves the safety of the battery pack, prolongs the service life of the battery, but also improves the energy utilization efficiency, supports higher energy density design, improves system reliability, and meets the requirements of regulations and standards.

[0028] The upper cover plate 2 and the lower cover plate 3 are respectively provided with a plurality of separate liquid flow channels 6 through the partition plate 7, and the two ends of the upper cover plate 2 and the lower cover plate 3 are both provided with a plurality of separate liquid flow channels 6. The two ends of the upper cover plate 2 and the lower cover plate 3 are both provided with a plurality of separate liquid flow channels 6. The two ends of the upper cover plate 2 and the lower cover plate 3 are both provided with a plurality of separate liquid flow channels 6.

[0029] By setting the separate liquid flow channels 6, the insertion slots 8 are arranged in the separate liquid flow channels 6, so that the corresponding heat dissipation fins 10 can be inserted into the insertion slots 8, and the heat dissipation efficiency is further improved. The separate liquid flow channels 6 are collected through the converging bin 12, and the flow is facilitated through the liquid inlet pipe 4 and the liquid outlet pipe 5.

[0030] The upper cover plate 2 and the lower cover plate 3 are both made of aluminum alloy.

[0031] The aluminum alloy has high specific strength and rigidity, can bear large pressure and load, is not easy to deform or break during use, meets the requirement of the battery pack on structural strength, can significantly reduce the overall weight of the battery pack compared with traditional steel materials and the like, thereby improving the endurance and energy efficiency of the new energy vehicle, and in addition, since the upper cover plate 2 and the lower cover plate 3 abut against the upper and lower ends of the battery cell 11 respectively, the heat generated in the battery pack can be quickly conducted to the outside under the excellent heat conduction performance of the aluminum alloy, the battery working temperature is effectively reduced, and the battery life is prolonged.

[0032] Embodiment two

[0033] On the basis of embodiment one, the side surface of the upper cover plate 2 and the lower cover plate 3 is provided with a limiting clamp 13, and a C-shaped clamp 14 is installed between the corresponding limiting clamps 13 of the upper cover plate 2 and the lower cover plate 3.

[0034] The lower cover plate 3 is installed at the bottom of the shell 1, then the battery cell 11 is completely installed, and then the upper cover plate 2 is installed at the top of the shell 1, at this time, the corresponding limiting clamps 13 are oppositely arranged, the operator can use the C-shaped clamp 14 to clamp and lock the two corresponding limiting clamps 13, so as to avoid the upper cover plate 2 or the lower cover plate 3 from falling off and causing the battery cell 11 to scatter, the assembly speed of the device can be improved through the cooperation of the limiting clamps 13 and the C-shaped clamp 14, the device is not fixed by using screws for a long time, the labor intensity of the operator is reduced, the assembly speed of the device is improved, in addition, the sealing gasket can effectively prevent external moisture, dust and other impurities from entering the inside of the battery pack, protect the battery system from pollution and corrosion, ensure the normal operation of the battery, and fill the small gap between the cover plates through the sealing gasket, enhance the overall air tightness of the battery pack, and prevent gas leakage, which is crucial for the air pressure balance and safety of the inside of the battery pack.

[0035] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can easily think of changes or additions or substitutions within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A high energy density battery pack comprising a housing (1), characterized in that, The upper and lower parts of the shell (1) are respectively provided with an upper cover plate (2) and a lower cover plate (3), the inside of the upper cover plate (2) and the lower cover plate (3) is respectively provided with a liquid flow channel (6), the opposite two sides of the shell (1) are respectively provided with a corresponding mounting groove (9), the mounting groove (9) is inserted with a cooling fin (10), the cooling fin (10) can abut the side of the electric core (11) inside the shell (1), the upper cover plate (2) and the lower cover plate (3) are respectively provided with an insertion slot (8), the cooling fin (10) can be inserted into the insertion slot (8), the opposite sides of the upper cover plate (2) are respectively provided with a liquid inlet pipe (4) and a liquid outlet pipe (5), the lower cover plate (3) is the same as the structure of the upper cover plate (2).

2. The high energy density battery pack of claim 1, wherein, The side of the upper cover plate (2) and the lower cover plate (3) is respectively provided with a limiting clamp (13), the corresponding limiting clamps (13) of the upper cover plate (2) and the lower cover plate (3) are installed with a C-shaped clamp (14).

3. The high energy density battery pack of claim 1, wherein, The upper cover plate (2) and the lower cover plate (3) are respectively provided with a plurality of separate liquid flow channels (6) through the partition plate (7), the two ends of the upper cover plate (2) and the lower cover plate (3) are respectively provided with a confluence bin (12) communicated with the plurality of separate liquid flow channels (6), the two corresponding ends of the confluence bin (12) are respectively provided with a liquid inlet pipe (4) and a liquid outlet pipe (5).

4. The high energy density battery pack of claim 3, wherein, A plurality of separate liquid flow channels (6) are respectively provided with an insertion slot (8) corresponding to a plurality of cooling fins (10).

5. The high energy density battery pack of claim 1, wherein, The upper cover plate (2) and the lower cover plate (3) are made of aluminum alloy material.

6. The high energy density battery pack of claim 1, wherein, The side of the upper cover plate (2) and the lower cover plate (3) abutting with the shell (1) is respectively provided with a sealing gasket.

7. The high energy density battery pack of claim 1, wherein, The cooling fin (10) is made of aluminum alloy material, and the height of the cooling fin (10) is greater than the depth of the shell (1).

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