Battery system

Abstract

The battery system comprises a shell, a plurality of single batteries and a power connector, the shell is provided with an installation cavity, the single batteries are sequentially connected in series and installed in the installation cavity to form a battery module, and the power connector is connected with the single batteries at the head end and the tail end and can charge the single batteries by being connected with charging equipment or being connected with electric equipment. The single batteries are connected in series in sequence, so that the single batteries do not need to be connected with middle adapters such as busbars, the structure of the battery system can be effectively simplified, and when the battery module of the battery system is assembled, the single batteries only need to be assembled in the shell, so that the battery module is convenient to assemble and disassemble, and the cost is reduced. The assembly difficulty of the battery system is reduced, each single battery is of a square structure, and each single battery of the square structure can be attached through series connection, so that the structure of the battery system is more compact under the condition of lack of adapters such as busbars and the like, and the volume of the battery system is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply devices, and particularly relates to a battery system. Background Art

[0002] A lithium battery pack is a battery assembly composed of multiple lithium battery monomers, which has the advantages of being lightweight, short charging time, high energy density, and long life, and is widely used in fields such as electric vehicles, drones, and electronic devices.

[0003] For example, the safety lithium battery pack structure disclosed in the patent document with the publication number CN220984768U includes a box body, a lithium battery module, and an upper cover. The box body has a receiving cavity, the lithium battery module is arranged in the receiving cavity, the lithium battery module includes multiple lithium battery monomers arranged in sequence, and each lithium battery pack is connected to the tabs of each lithium battery monomer through a busbar arrangement to achieve power input and output.

[0004] Although the existing lithium battery pack can achieve power input and output of each single battery through the busbar arrangement, it is likely that the structure of the lithium battery system is too complex due to the presence of the busbar, resulting in a large assembly difficulty and volume of the battery system. Moreover, due to the presence of connection components such as the busbar, it is inconvenient for the thermal management of the battery system. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above technical deficiencies, and propose a battery system to solve the technical problems that the structure of the battery pack in the prior art is relatively complex, resulting in a large assembly difficulty and volume of the battery system.

[0006] To achieve the above technical purpose, the present invention adopts the following technical solutions: The present invention provides a battery system, including: A housing having an installation cavity; A plurality of single batteries, each of the single batteries is of a square structure, and the single batteries are connected in series in sequence and installed in the installation cavity, and each adjacent single battery is in contact with each other; A power connector connected to the single batteries at the head end and the tail end for charging and discharging each of the single batteries.

[0007] In some embodiments, a heat-conducting surface is formed on the surface of each of the single batteries, and the heat-conducting surface is in contact with the side wall of the installation cavity.

[0008] In some embodiments, the single batteries are stacked to form a battery module with a double-layer structure.

[0009] In some embodiments, the battery system further includes a heat dissipation module, and the heat dissipation module is arranged on the housing for dissipating heat from the housing.

[0010] In some embodiments, the heat dissipation module includes a water inlet pipe, a water outlet pipe, and a water cooling channel. The water cooling channel is disposed inside the housing, and the water inlet pipe and the water outlet pipe are respectively connected to the water inlet end and the water outlet end of the water cooling channel.

[0011] In some embodiments, the single battery at the head end is adjacent to the single battery at the tail end.

[0012] In some embodiments, the housing includes a bottom case and an upper cover. The upper cover is disposed on the bottom case and abuts against the single battery.

[0013] In some embodiments, the power connector includes a high-voltage interface, a positive conductive member, and a negative conductive member. The positive conductive member is connected to the terminal of the single battery at the head end, and the negative conductive member is connected to the terminal of the single battery at the tail end. The high-voltage interface is installed at the end of the housing and is connected to the positive conductive member and the negative conductive member.

[0014] In some embodiments, the battery system further includes a communication interface, and the communication interface is connected to the single batteries at the head end and the tail end.

[0015] In some embodiments, the battery system further includes a battery management module. The battery management module is installed on one side of the end face of the single battery at the edge and is used to collect the voltage and temperature information of each single battery.

[0016] Compared with the prior art, the battery system provided by the present invention includes a housing, a plurality of single batteries, and a power connector. The housing has an installation cavity. Each single battery is connected in series and installed in the installation cavity to form a battery module. The power connector is connected to the single batteries at the head end and the tail end. It can be connected to a charging device to charge each single battery, or connected to an electrical device to supply power to the electrical device. Since each single battery is connected in series, each single battery does not need to be connected through an intermediate adapter such as a bus bar, which can effectively simplify the structure of the battery system. When assembling the battery module of the battery system, only need to first assemble each single battery inside the housing, which reduces the assembly difficulty of the battery system. And since each single battery is a square structure, the square-structured single batteries can be formed into a fit through series connection. In the absence of intermediate adapters such as bus bars, the structure of the battery system is more compact, effectively reducing the volume of the battery system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the battery system provided by the embodiment of the present invention; Figure 2 is an exploded view of the battery system provided by the embodiment of the present invention; Figure 3 is a schematic structural diagram of the battery system with the upper cover hidden provided by the embodiment of the present invention; Figure 4 is the heat dissipation schematic diagram of the battery system provided by the embodiment of the present invention; Figure 5 is the schematic diagram of the relative structure of the positive electrode part and the negative electrode part of the single battery provided by the embodiment of the present invention; Figure 6 is the schematic diagram of the relative structure of the positive electrode part and the negative electrode part of the single battery from another angle provided by an embodiment of the present invention; Figure 7 is the explosion diagram of the relative positive electrode part and negative electrode part of the single battery provided by an embodiment of the present invention; Figure 8 is the schematic diagram of the adjacent structure of the positive electrode part and the negative electrode part of the single battery provided by another embodiment of the present invention; Figure 9 is the explosion diagram of the adjacent positive electrode part and negative electrode part of the single battery provided by another embodiment of the present invention; Figure 10 is the formation schematic diagram of the battery module provided by the embodiment of the present invention.

[0018] Each reference numeral in the figure: 10 - housing, 11 - installation cavity, 12 - bottom shell 13 - upper cover, 20 - single battery, 21 - battery module 22 - heat conduction surface, 23 - outer shell, 24 - positive electrode part 25 - negative electrode part, 26 - energy storage module, 30 - power connector 31 - positive electrode conductive part, 32 - negative electrode conductive part, 33 - high - voltage interface 40 - heat dissipation module, 41 - water inlet pipe, 42 - water outlet pipe 43 - water cooling channel, 50 - communication interface, 60 - battery management module 70 - explosion - proof valve. Detailed implementation manners

[0019] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] In order to solve the technical problem that the structure of the battery pack in the prior art is relatively complex, resulting in a large assembly difficulty and volume of the battery system, the embodiment of the present invention provides a battery system, which can reduce the assembly difficulty of the battery system and reduce the volume of the battery system.

[0021] It should be noted that the battery system described in the present invention is used for but not limited to lithium batteries, etc. The principle of applying a single battery to other types of batteries is substantially the same as that applied to lithium batteries, and will not be elaborated here one by one.

[0022] As Figure 1-3 shown, the battery system provided by the embodiment of the present invention includes a housing 10, a plurality of single cells 20, and a power connector 30. The housing 10 has an installation cavity 11; each single cell 20 has a square structure, and each single cell 20 is connected in series in sequence and installed in the installation cavity 11; the power connector 30 is connected to the single cells 20 at the head end and the tail end for charging and discharging each single cell 20.

[0023] Specifically, the battery system includes a housing 10, a plurality of single cells 20, and a power connector 30. The housing 10 has an installation cavity 11. Each single cell 20 is connected in series in sequence and installed in the installation cavity 11 to form a battery module 21. The power connector 30 is connected to the single cells 20 at the head end and the tail end. By connecting a charging device, each single cell 20 can be charged, or by connecting an electrical device, power can be supplied to the electrical device. Since each single cell 20 is connected in series in sequence, each single cell 20 does not need to be connected through an intermediate adapter such as a bus bar, which can effectively simplify the structure of the battery system. When assembling the battery module 21 of the battery system, only need to first assemble each single cell 20 inside the housing 10, which reduces the assembly difficulty of the battery system. And since each single cell 20 has a square structure, the square single cells 20 can be formed into a fit through series connection. In the case of lacking intermediate adapters such as bus bars, the structure of the battery system is more compact, effectively reducing the volume of the battery system.

[0024] In one embodiment, as Figure 1-2 shown, the housing 10 includes a bottom case 12 and an upper cover 13. The upper cover 13 is covered on the bottom case 12 and abuts against the single cell 20. Specifically, the upper cover 13 forms the installation cavity 11 structure by covering the bottom case 12. When assembling the battery system, first disassemble the upper cover 13, then sequentially splice each single cell 20 in the bottom case 12, and finally cover the upper cover 13 and press the single cell 20 to limit the battery module 21 formed by the single cell 20. Through the pressing of the upper cover 13, the structure of the housing 10 can be directly used to limit each single cell 20, without setting a special limiting structure to limit each single cell 20, thus simplifying the structure of the battery system, facilitating the assembly of the battery system, and effectively ensuring the stability of the battery module.

[0025] In this embodiment, as Figure 1-2 shown, a plurality of bolts are provided on the periphery of the upper cover 13, and the upper cover 13 is fastened to the bottom case 12 by bolts.

[0026] In one embodiment, as Figure 2-4As shown, a heat-conducting surface 22 is formed on the surface of each single cell 20, and the heat-conducting surface 22 is attached to the side wall of the installation cavity 11. Specifically, by attaching the heat-conducting surface 22 to the side wall of the installation cavity 11, the heat generated by each single cell 20 can be transferred to the housing 10 through the surface of the single cell 20. Therefore, only by dissipating the heat of the housing 10 can the heat dissipation of each single cell 20 be realized, which provides convenience for the heat dissipation of the battery system.

[0027] In this embodiment, as Figure 2-6 shown, the single cell 20 has a cube structure and includes a housing 23, a positive electrode member 24, a negative electrode member 25, and an energy storage module 26. The positive electrode member 24 and the negative electrode member 25 are disposed on adjacent or opposite surfaces of the housing 23 and connected to the energy storage module; the energy storage module 26 is disposed inside the housing 23 for storing electric energy; the positive electrode member 24 and the negative electrode member 25 of the single cell 20 are docked.

[0028] Specifically, the single cell 20 includes a housing 23, a positive electrode member 24, a negative electrode member 25, and an energy storage module 26. The positive electrode member 24 and the negative electrode member 25 are located on two different surfaces of the housing 23, forming an adjacent structure as Figure 5-7 shown or a relative structure as Figure 8-9 shown. The energy storage module 26 is located inside the housing 23 for energy storage. The positive electrode member 24 and the negative electrode member 25 can input or output electric energy by connecting the energy storage module 26. When the battery module 21 is formed by splicing the single cells 20, only by docking the positive electrode member 24 of one single cell 20 with the negative electrode member 25 of another single cell 20 can the two single cells 20 be connected in series. By connecting several single cells 20 in the above manner, the battery module 21 can be formed. The battery module 21 can input and output electric energy through the positive electrode member 24 and the negative electrode member 25 of the single cells 20 at the edge, and there is no need to separately set up transfer components such as busbars, thus effectively simplifying the structure of the battery module 21.

[0029] In one of the embodiments, as Figure 2-10 shown, the housing 23 has a cube structure. Specifically, by setting the housing 23 as a cube structure, the single cell 20 can be spliced into any structure that can be formed by splicing multiple cube structures, such as a "one"-shaped, "L"-shaped, zigzag, block-shaped, multi-dimensional shape, etc., according to actual needs, so as to meet the battery module 21 with any shape requirements.

[0030] In this embodiment, the housing 23 is made of aluminum alloy, and its functions are to support and protect the energy storage module 26 and conduct heat.

[0031] In one of the embodiments, as Figure 2-4As shown in FIGS. 9 and 10, adjacent single cells 20 are joined together. Specifically, by joining adjacent single cells 20, on the one hand, heat conduction can be achieved among the single cells 20, facilitating the transfer of the heat of each single cell 20 to the housing 10 through the heat conduction surface 22, and facilitating the heat dissipation of each single cell 20. At the same time, each single cell 20 can be limited by adjacent single cells 20, so that the limitation of each single cell 20 can be realized without other limiting components, simplifying the structure of the battery system and making the structure of the battery system more compact, thereby reducing the volume of the battery system.

[0032] In one embodiment, as Figure 7 and 9 shown, the energy storage module 26 includes a laminated core, a positive tab, and a negative tab. The laminated core is installed inside the housing 23. The positive tab is installed on one side of the laminated core and connects the positive electrode member 24 and the positive electrode material of the laminated core. The negative tab is installed on the side of the laminated core adjacent to or opposite to the positive tab and connects the negative electrode member 25 and the negative electrode material of the laminated core.

[0033] In this embodiment, when the positive electrode members 24 and the negative electrode members 25 of each single cell 20 are adjacent to each other, a battery module 21 with a continuously bent folded structure can be formed.

[0034] In this embodiment, when the positive electrode members 24 and the negative electrode members 25 of each single cell 20 in the battery module 21 are opposite surfaces, the battery module 21 can form a "one" - shaped structure.

[0035] In one embodiment, as Figure 2-4 and 10 shown, the single cell 20 at the head end is adjacent to the single cell 20 at the tail end. Specifically, by selecting appropriate single cells 20, the single cells 20 at the head end and the tail end are made adjacent. Through the adjacent arrangement of the single cells 20 at the head end and the tail end, the power connectors 30 connected to the single cells 20 at the head end and the tail end are located on the same side and adjacent, thereby facilitating the connection of external charging devices and electrical equipment, and facilitating the assembly and connection of other electrical components of the battery system, making the structure of the battery system more compact.

[0036] In this embodiment, when the positive electrode members 24 and the negative electrode members 25 of some single cells 20 in the battery module 21 are adjacent, and some positive electrode members 24 and negative electrode members 25 are opposite, the battery module 21 structure of any structural form can be spliced according to actual needs.

[0037] In this embodiment, as Figure 10As shown, first, single cells 20 with the positive electrode member 24 and the negative electrode member 25 facing each other are selected for series connection. The single cell 20 at the end of the series connection is the single cell 20 with the positive electrode member 24 and the negative electrode member 25 adjacent. Then, based on this single cell 20, single cells 20 with the positive electrode member 24 and the negative electrode member 25 adjacent are selected for series connection. Then, single cells 20 with the positive electrode member 24 and the negative electrode member 25 facing each other are assembled in the direction of the single cell 20 at the head end. Through one or more rounds of the above splicing, finally, the single cells 20 at the head end and the tail end become adjacent.

[0038] In this embodiment, the single cells 20 are stacked to form a battery module 21 with a double-layer structure. Each single cell 20 is formed into a double-layer battery module 21 structure as Figure 10 shown. The arrow direction in the figure is the series connection direction of each single cell 20. Specifically, the double-layer structure can facilitate the heat dissipation of each single cell 20. At the same time, it can be stabilized by the extrusion of the upper cover 13, thus ensuring the stability of the structure of the battery module 21.

[0039] In one of the embodiments, as Figure 1-4 shown, the power connector 30 includes a positive electrode conductive member 31, a negative electrode conductive member 32, and a high-voltage interface 33. The positive electrode conductive member 31 is connected to the pole column of the single cell 20 at the head end, the negative electrode conductive member 32 is connected to the pole column of the single cell 20 at the tail end, and the high-voltage interface 33 is installed at the end of the housing 10 and is connected to the positive electrode conductive member 31 and the negative electrode conductive member 32. Specifically, the high-voltage interface 33 can be plugged in by a charging device and an electrical device. The positive electrode conductive member 31 and the negative electrode conductive member 32 can input and output the electrical energy of each single cell 20 by connecting the single cells 20 at the head end and the tail end.

[0040] In one of the embodiments, as Figure 1-4 shown, the battery system further includes a heat dissipation module 40. The heat dissipation module 40 is arranged on the housing 10 and is used to dissipate heat from the housing 10. Specifically, since the single cell 20 can conduct heat to the housing 10 through the heat conduction surface 22, the heat dissipation module 40 can dissipate heat from the housing 10 continuously, so as to dissipate heat from each single cell 20, effectively simplifying the heat dissipation structure of the battery system.

[0041] In this embodiment, the heat dissipation module 40 is arranged on the bottom walls of the upper cover 13 and the bottom case 12.

[0042] In one of the embodiments, as Figure 1-4As shown in the figure, the heat dissipation module 40 includes a water inlet pipe 41, a water outlet pipe 42, and a water cooling channel 43. The water cooling channel 43 is disposed inside the housing 10. The water inlet pipe 41 and the water outlet pipe 42 are respectively connected to the water inlet end and the water outlet end of the water cooling channel 43. Specifically, the cooling water enters the water cooling channel 43 through the water inlet pipe 41, flows along the water cooling channel 43, and then flows out through the water outlet pipe 42, finally realizing the water cooling of the housing 10. The heat dissipation principle is as shown in the figure, where the arrow directions at the bottom case 12 and the upper cover 13 in the figure are the flowing directions of the cooling water, and the arrow direction of the single cell 20 is the heat flowing direction of the single cell 20. Through the above water cooling form, while providing efficient heat dissipation for each single cell 20, it is possible to avoid an increase in the volume of the battery system due to the setting of the heat dissipation module 40, thereby reducing the volume of the battery system.

[0043] In one embodiment, as Figure 1-4 shown, the battery system further includes a communication interface 50. The communication interface 50 is connected to the single cells 20 at the head end and the tail end. Specifically, the communication interface 50 can be used for the transmission of low-voltage signals.

[0044] In this embodiment, the communication interface 50 is a low-voltage connector, which is composed of a plurality of metal cores and a plastic housing, and is manufactured by an in-mold injection process. It mainly serves as an interface for external communication of the battery management system and is used to transmit low-voltage signals.

[0045] In one embodiment, as Figure 1-4 shown, the battery system further includes a battery management module 60. The battery management module 60 is installed on one side of the end face of the single cell 20 at the edge and is used to collect the voltage and temperature information of each single cell 20. Specifically, the battery management system is a component composed of a plastic housing, a PCB board and many other electronic components. It can collect the voltage and temperature of each lithium battery monomer in the lithium battery pack and can transmit the information to the upper-level management system to facilitate the upper-level management system to make corresponding actions.

[0046] In one embodiment, as Figure 1-4 shown, the battery system further includes an explosion-proof valve 70. The explosion-proof valve 70 is a component composed of an aluminum alloy housing and a rubber sealing ring, and can leak high-pressure gas to prevent the system housing from bursting when the internal pressure of the lithium battery system is too high.

[0047] The specific embodiments of the present invention described above do not constitute a limitation to the protection scope of the present invention. Any other corresponding changes and deformations made according to the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A battery system, characterized in that, Comprising: A housing having an installation cavity; A plurality of single cells, each of the single cells being of a square structure, the single cells being connected in series in sequence and installed in the installation cavity, and adjacent single cells being in contact with each other; and A power connector connected to the single cells at the first end and the last end for charging and discharging each of the single cells.

2. The battery system according to claim 1, wherein A heat-conducting surface is formed on the surface of each of the single cells, and the heat-conducting surface is in contact with the inner wall of the installation cavity.

3. The battery system according to claim 1, wherein The single cells are stacked to form a battery module with a double-layer structure.

4. The battery system according to claim 2, wherein The battery system further includes a heat dissipation module disposed in the housing for dissipating heat from the housing.

5. The battery system according to claim 4, characterized in that, The heat dissipation module includes a water inlet pipe, a water outlet pipe and a water cooling channel, the water cooling channel is disposed inside the housing, and the water inlet pipe and the water outlet pipe are respectively connected to the water inlet end and the water outlet end of the water cooling channel.

6. The battery system according to any one of claims 1-5, characterized in that, The single cell at the first end is adjacent to the single cell at the last end.

7. The battery system according to any one of claims 1-5, characterized in that, The housing includes a bottom case and an upper cover, and the upper cover covers the bottom case and abuts against the single cells.

8. The battery system according to any one of claims 1-5, characterized in that, The power connector includes a high-voltage interface, a positive conductive member and a negative conductive member. The positive conductive member is connected to the pole column of the single cell at the first end, the negative conductive member is connected to the pole column of the single cell at the last end, and the high-voltage interface is installed at the end of the housing and connected to the positive conductive member and the negative conductive member.

9. The battery system according to any one of claims 1-5, characterized in that, The battery system further includes a communication interface connected to the single cells at the first end and the last end.

10. The battery system according to any one of claims 1-5, characterized in that, The battery system further includes a battery management module installed on one side of the end face of the single cell at the edge for collecting voltage and temperature information of each of the single cells.

Images