Lithium Battery System and Electronic Device

Abstract

The present application discloses a lithium battery system and an electronic device. The lithium battery system includes: a first lithium battery pack, a second lithium battery pack, and a battery management module. The first lithium battery pack includes a plurality of first sub-batteries, and at least some of the first sub-batteries are electrically connected. The second lithium battery pack is insulated from the first lithium battery pack. The second lithium battery pack includes a plurality of second sub-batteries, and at least some of the second sub-batteries are electrically connected. The battery management module is electrically connected to the first lithium battery pack and the second lithium battery pack respectively. The battery management module is configured to obtain the battery power of the first lithium battery pack and the second lithium battery pack, and control the charging time of the first lithium battery pack to be prior to the charging time of the second lithium battery pack or control the discharging time of the second lithium battery pack to be prior to the discharging time of the first lithium battery pack. Wherein, the types of the first sub-batteries and the second sub-batteries are the same, and each first sub-battery is disposed adjacent to at least one second sub-battery.

Description

Technical Field

[0001] This application relates to the technical field of lithium batteries, and particularly relates to a lithium battery system and an electronic device. Background Art

[0002] With the rapid development of the new energy vehicle and battery energy storage industries, lithium-ion batteries with advantages such as high integration rate and large capacity are widely used. However, in a lithium-ion battery system, once a certain battery undergoes thermal runaway due to reasons such as electrical, mechanical, or thermal abuse, a large amount of heat will be rapidly released due to a violent chain redox reaction. This part of the energy may trigger the thermal runaway of the surrounding batteries, thereby triggering thermal spread, seriously threatening the safety of the battery system and users.

[0003] In the prior art, advanced thermal management systems and multi-level battery management technologies are used to prevent thermal runaway, but the effect is poor and the design difficulty and cost of the battery system are greatly increased.

[0004] Therefore, how to prevent thermal spread in lithium batteries is an urgent problem to be solved. Summary of the Invention

[0005] This application provides a lithium battery system and an electronic device, aiming to prevent thermal spread in lithium batteries.

[0006] On the one hand, an embodiment of this application provides a lithium battery system. The lithium battery system includes a first lithium battery pack, a second lithium battery pack, and a battery management module. The first lithium battery pack includes a plurality of first sub-batteries, and at least some of the first sub-batteries are electrically connected; the second lithium battery pack is insulated from the first lithium battery pack, the second lithium battery pack includes a plurality of second sub-batteries, and at least some of the second sub-batteries are electrically connected; the battery management module is electrically connected to the first lithium battery pack and the second lithium battery pack respectively. The battery management module is used to obtain the battery power of the first lithium battery pack and the second lithium battery pack, and control the charging time of the first lithium battery pack to be earlier than the charging time of the second lithium battery pack or control the discharging time of the second lithium battery pack to be earlier than the discharging time of the first lithium battery pack; wherein, the types of the first sub-batteries and the second sub-batteries are the same, and each first sub-battery is adjacent to at least one second sub-battery.

[0007] Optionally, in some embodiments of this application, the type of the first sub-battery includes one of a ternary lithium battery, a solid-state lithium battery, a lithium iron phosphate battery, and a sodium-ion battery.

[0008] Optionally, in some embodiments of the present application, the first lithium battery pack and the second lithium battery pack include a plurality of first battery columns and a plurality of second battery columns, and the first battery columns and the second battery columns are arranged alternately along a first direction; the first battery columns at least include a plurality of the first sub-batteries arranged adjacent to each other along a second direction, and the second battery columns at least include a plurality of the second sub-batteries arranged adjacent to each other along the second direction; at least some of the first sub-batteries and the second sub-batteries are arranged adjacent to each other along the first direction, and the first direction is perpendicular to the second direction.

[0009] Optionally, in some embodiments of the present application, the number of the first sub-batteries in the first battery columns is equal to the number of the second sub-batteries in the second battery columns, and the first sub-batteries and the second sub-batteries are arranged adjacent to each other and alternately along the first direction.

[0010] Optionally, in some embodiments of the present application, the first battery columns include a first input end and a first output end, and the plurality of the first sub-batteries in the first battery columns are electrically connected in sequence from the first input end to the first output end direction, at least two of the first input ends are electrically connected, and at least two of the first output ends are electrically connected; the second battery columns include a second input end and a second output end, and the second sub-batteries in the second battery columns are electrically connected in sequence from the second input end to the second output end direction, at least two of the second input ends are electrically connected, and at least two of the second output ends are electrically connected.

[0011] Optionally, in some embodiments of the present application, the number of the first battery columns is equal to the number of the second battery columns, and the connection manner between the plurality of the first sub-batteries is the same as the connection manner between the plurality of the second sub-batteries.

[0012] Optionally, in some embodiments of the present application, the two first input ends of any two adjacent first battery columns are electrically connected to the output end of the power management module, and the two first output ends of the two first battery columns are electrically connected to the input end of the power management module.

[0013] Optionally, in some embodiments of the present application, the first input end of the first battery column, the first input end of the second battery column, and the output end of the power management module are electrically connected. The first output end of the second battery column is electrically connected to the first input end of the third battery column. The first output end of the first battery column is electrically connected to the first input end of the fourth battery column. The first output end of the third battery column is electrically connected to the first input end of the sixth battery column. The first output end of the fourth battery column is electrically connected to the first input end of the fifth battery column. The first output end of the fifth battery column and the first output end of the sixth battery column are electrically connected to the first input end of at least one adjacent first battery column or to the input end of the power management module.

[0014] Optionally, in some embodiments of the present application, the first input end of the first battery column is electrically connected to the output end of the power management module. The first output end of the first battery column is electrically connected to the first input end of the second battery column. The first output end of the second battery column is electrically connected to the first input end of the third battery column. The first output end of the third battery column is electrically connected to the first input end of the fourth battery column. The first output end of the fourth battery column is electrically connected to the first input end of the fifth battery column or to the input end of the power management module.

[0015] Optionally, in some embodiments of the present application, the number of the first battery columns is N, where N is a positive integer greater than or equal to 4. The first input end of the first battery column, the first input end of the Nth battery column, and the output end of the power management module are electrically connected. The first output end of the first battery column, the first output end of the Nth battery column, and the input end of the power management module are electrically connected. The first input end of the second battery column, the first input end of the (N - 1)th battery column, and the output end of the power management module are electrically connected. The first output end of the second battery column, the first output end of the (N - 1)th battery column, and the input end of the power management module are electrically connected.

[0016] Optionally, in some embodiments of the present application, the number of the first battery columns is N, where N is a positive integer greater than or equal to 3; the first input ends of the N first battery columns are all electrically connected to the output end of the power management module, and the first output ends of the N first battery columns are all electrically connected to the input end of the power management module.

[0017] Optionally, in some embodiments of the present application, both the first battery column and the second battery column include a first battery unit and a second battery unit arranged adjacent to each other along the second direction. The first battery unit includes a plurality of the first sub-batteries arranged adjacent to each other along the second direction, and the second battery unit includes a plurality of the second sub-batteries arranged adjacent to each other along the second direction; the number of the first battery units in the first battery column is equal to the number of the second battery units in the first battery column and they are arranged alternately; the number of the first battery units in the second battery column is equal to the number of the second battery units in the second battery column and they are arranged alternately; the first battery unit and the second battery unit are arranged alternately along the first direction.

[0018] Optionally, in some embodiments of the present application, the first sub-batteries and the second sub-batteries are arranged alternately along the first direction and the first sub-batteries and the second sub-batteries are arranged alternately along the second direction.

[0019] Optionally, in some embodiments of the present application, the first input terminal includes a first sub-input terminal and a second sub-input terminal, and the first output terminal includes a first sub-output terminal and a second sub-output terminal; the first one of the first sub-batteries in the first battery column is electrically connected to the first sub-input terminal, the last one of the first sub-batteries arranged along the second direction in the first battery column is electrically connected to the first sub-output terminal, and the multiple first sub-batteries in the first battery column are electrically connected in sequence from the first sub-input terminal to the first sub-output terminal; the first one of the second sub-batteries in the first battery column is electrically connected to the second sub-input terminal, the last one of the second sub-batteries arranged along the second direction in the first battery column is electrically connected to the second sub-output terminal, and the multiple second sub-batteries in the first battery column are electrically connected in sequence from the second sub-input terminal to the second sub-output terminal; the second input terminal includes a third sub-input terminal and a fourth sub-input terminal, and the second output terminal includes a third sub-output terminal and a fourth sub-output terminal; the first one of the first sub-batteries in the second battery column is electrically connected to the third sub-input terminal, the last one of the first sub-batteries arranged along the second direction in the second battery column is electrically connected to the third sub-output terminal, and the multiple first sub-batteries in the second battery column are electrically connected in sequence from the third sub-input terminal to the third sub-output terminal; the first one of the second sub-batteries in the second battery column is electrically connected to the fourth sub-input terminal, the last one of the second sub-batteries arranged along the second direction in the second battery column is electrically connected to the fourth sub-output terminal, and the multiple second sub-batteries in the second battery column are electrically connected in sequence from the fourth sub-input terminal to the fourth sub-output terminal.

[0020] On the other hand, the present application provides an electronic device, and the electronic device includes the lithium battery system as described above.

[0021] In the lithium battery system and electronic device provided by the present application, the lithium battery system includes a first lithium battery pack, a second lithium battery pack, and a battery management module. The first lithium battery pack includes a plurality of first sub-batteries, and at least some of the first sub-batteries are electrically connected; the second lithium battery pack is insulated from the first lithium battery pack, and the second lithium battery pack includes a plurality of second sub-batteries, and at least some of the second sub-batteries are electrically connected; the battery management module is electrically connected to the first lithium battery pack and the second lithium battery pack respectively, and the battery management module is used to obtain the battery power of the first lithium battery pack and the second lithium battery pack, and control the charging time of the first lithium battery pack to be earlier than the charging time of the second lithium battery pack or control the discharging time of the second lithium battery pack to be earlier than the discharging time of the first lithium battery pack; wherein, the types of the first sub-batteries and the second sub-batteries are the same, and each first sub-battery is adjacent to at least one second sub-battery. That is, in the lithium battery system provided by the present application, by arranging the first lithium battery pack and the second lithium battery pack adjacent to each other and insulating them, and by controlling the charging and discharging times of the first lithium battery pack and the second lithium battery pack differently through the power management module, their battery powers are different in the same time period. Based on the principle that the thermal runaway behavior of lithium batteries varies greatly under different states of charge, by arranging the first lithium battery pack with different battery powers adjacent to the second lithium battery pack, it is possible to effectively reduce the energy transferred to the first sub-battery or the second sub-battery through the tabs after a battery thermal runaway occurs during the operation of the lithium battery system, that is, effectively inhibit the spread of thermal runaway between battery packs, and further prevent the occurrence of thermal spread of lithium batteries. Description of the Drawings

[0022] Figure 1 is a schematic diagram of the lithium battery system according to the first embodiment provided by the present application;

[0023] Figure 2 is a schematic diagram of the lithium battery system according to the second embodiment provided by the present application;

[0024] Figure 3 is a schematic diagram of the lithium battery system according to the third embodiment provided by the present application;

[0025] Figure 4 is a schematic diagram of the lithium battery system according to the fourth embodiment provided by the present application;

[0026] Figure 5 is a schematic diagram of the lithium battery system according to the fifth embodiment provided by the present application;

[0027] Figure 6 is a schematic diagram of the lithium battery system according to the sixth embodiment provided by the present application;

[0028] Figure 7 is a schematic diagram of the lithium battery system according to the seventh embodiment provided by the present application. Specific embodiments

[0029] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. The described technical solutions are only used to explain and illustrate the idea of the present application, and should not be regarded as a limitation on the protection scope of the present application.

[0030] The various embodiments provided by the present application are similar, and the features in different embodiments can be combined with each other.

[0031] As Figure 1 shown, an embodiment of the present application provides a lithium battery system 100, and the lithium battery system 100 includes a first lithium battery pack 10, a second lithium battery pack 20, and a battery management module 30.

[0032] In the embodiment of the present application, the first lithium battery pack 10 includes a plurality of first sub-batteries 11, and at least some of the first sub-batteries 11 are electrically connected. The second lithium battery pack 20 is insulated from the first lithium battery pack 10, and the second lithium battery pack 20 includes a plurality of second sub-batteries 21, and at least some of the second sub-batteries 21 are electrically connected.

[0033] In the embodiment of the present application, the battery management module 30 is electrically connected to the first lithium battery pack 10 and the second lithium battery pack 20 respectively. The battery management module 30 is used to obtain the battery power of the first lithium battery pack 10 and the second lithium battery pack 20, and control the charging time of the first lithium battery pack 10 to be prior to the charging time of the second lithium battery pack 20 or control the discharging time of the second lithium battery pack 20 to be prior to the discharging time of the first lithium battery pack 10.

[0034] In the embodiment of the present application, the battery power of the first lithium battery pack 10 is higher than that of the second lithium battery pack 20. Specifically, the battery power of at least some of the first sub-batteries 11 is higher than that of the second sub-batteries 21. Preferably, the battery power of each first sub-battery 11 is greater than that of any second sub-battery 21.

[0035] Among them, the types of the first sub-batteries 11 and the second sub-batteries 21 are the same, and each first sub-battery 11 is arranged adjacent to at least one second sub-battery 21.

[0036] The lithium battery system 100 provided by the present application arranges the first lithium battery pack 10 and the second lithium battery pack 20 adjacent to each other and insulated, and controls the charging and discharging times of the first lithium battery pack 10 and the second lithium battery pack 20 to be different, so that their battery powers are different within the same time period. Based on the principle that the thermal runaway behavior of lithium batteries varies greatly under different states of charge, by arranging the first lithium battery pack 10 with different battery powers adjacent to the second lithium battery pack 20, it is possible to effectively reduce the energy transmitted to the first sub-battery 11 or the second sub-battery 21 through the tab after a battery thermal runaway occurs during the operation of the lithium battery system, that is, effectively inhibit the spread of thermal runaway between battery packs, and further prevent the occurrence of thermal propagation of lithium batteries.

[0037] Specifically, when the traditional lithium battery system discharges 50% of its energy, each battery has a battery power of 50% (50% SOC). By controlling the discharge time of the second lithium battery pack 20 to be earlier than that of the first lithium battery pack 10, it can be ensured that a part of the batteries finishes discharging earlier than another part of the batteries. (For example, the second lithium battery pack 20 discharges first, and all of the second lithium battery pack 20 has reached 0% SOC, while the first lithium battery pack 10 has not started discharging and is still in a fully charged state). In this way, even if a certain first sub-battery 11 in the first lithium battery pack 10 with 100% SOC experiences thermal runaway, the energy is not sufficient to trigger thermal runaway of the surrounding other batteries. Because the surrounding in the physical space of this battery is full of batteries of the second lithium battery pack 20 (0% SOC). The lower the battery power, the more difficult it is to trigger the thermal runaway process, and the batteries with lower SOC are safer.

[0038] In the embodiment of the present application, the type of the first sub-battery 11 includes one of a ternary lithium battery, a solid-state lithium battery, a lithium iron phosphate battery, and a sodium-ion battery. Specifically, the type of the first sub-battery 11 is the same as that of the second sub-battery 21. For example, both the first sub-battery 11 and the second sub-battery 21 are ternary lithium batteries.

[0039] In the embodiment of the present application, the first lithium battery pack 10 and the second lithium battery pack 20 include a plurality of first battery columns L1 and a plurality of second battery columns L2, and the first battery columns L1 and the second battery columns L2 are alternately arranged along the first direction X. The first battery column L1 at least includes a plurality of first sub-batteries 11 arranged adjacent to each other along the second direction Y, and the second battery column L2 at least includes a plurality of second sub-batteries 21 arranged adjacent to each other along the second direction Y. At least some of the first sub-batteries 11 and the second sub-batteries 21 are arranged adjacent to each other along the first direction X, and the first direction X is perpendicular to the second direction Y.

[0040] In the embodiment of the present application, the number of the first sub-batteries 11 in the first battery column L1 is equal to the number of the second sub-batteries 21 in the second battery column L2, and the first sub-batteries 11 and the second sub-batteries 21 are arranged adjacent to each other and alternately along the first direction X.

[0041] In an embodiment of the present application, the first battery string L1 includes a first input end IN1 and a first output end OU1. A plurality of first sub-batteries 11 located in the first battery string L1 are electrically connected in sequence from the first input end IN1 to the first output end OU1. At least two first input ends IN1 are electrically connected, and at least two first output ends OU1 are electrically connected.

[0042] In an embodiment of the present application, the first battery string L1 is composed of a plurality of first sub-batteries 11. The input end of the first sub-battery 11 at one end of the first battery string L1 is electrically connected to the first input end IN1 of the first battery string L1, and the output end of the first sub-battery 11 at the other end of the first battery string L1 is electrically connected to the first output end OU1 of the first battery string L1.

[0043] In an embodiment of the present application, the second battery string L2 includes a second input end IN2 and a second output end OU2. Second sub-batteries 21 located in the second battery string L2 are electrically connected in sequence from the second input end IN2 to the second output end OU2. At least two second input ends IN2 are electrically connected, and at least two second output ends OU2 are electrically connected.

[0044] In an embodiment of the present application, the second battery string L2 is composed of a plurality of second sub-batteries 21. The input end of the second sub-battery 21 at one end of the second battery string L2 is electrically connected to the second input end IN2 of the second battery string L2, and the output end of the second sub-battery 21 at the other end of the second battery string L2 is electrically connected to the second output end OU2 of the second battery string L2.

[0045] In an embodiment of the present application, the number of the first battery strings L1 is equal to the number of the second battery strings L2, and the connection manner between the plurality of first sub-batteries 11 is the same as the connection manner between the plurality of second sub-batteries 21.

[0046] In an embodiment of the present application, the two first input ends IN1 of any two adjacent first battery strings L1 are electrically connected to the output end 31 of the battery management module 30, and the two first output ends OU1 of the two first battery strings L1 are electrically connected to the input end of the battery management module 30.

[0047] Figure 1 Only as an example, as another implementation manner of the present application, the N first input ends IN1 of N adjacent first battery strings L1 are electrically connected to the output end 31 of the battery management module 30, and the N first output ends OU1 of the N first battery strings L1 are electrically connected to the input end 32 of the battery management module 30. N is a positive integer greater than or equal to 3, and the values of N include 3, 4, 5, 6, 7, 8, 9, 10...

[0048] In an embodiment of the present application, two second input terminals IN2 of any two adjacent second battery columns L2 are electrically connected to an output terminal 31 of the battery management module 30, and two second output terminals OU2 of the two second battery columns L2 are electrically connected to an input terminal 32 of the battery management module 30.

[0049] Figure 1 Only as an example, as another implementation manner of the present application, N second input terminals IN2 of N adjacent second battery columns L2 are electrically connected to an output terminal 31 of the battery management module 30, and N second output terminals OU2 of the N second battery columns L2 are electrically connected to an input terminal 32 of the battery management module 30, where N is a positive integer greater than or equal to 3, and the values of N include 3, 4, 5, 6, 7, 8, 9, 10...

[0050] The lithium battery system provided by the present application arranges the first lithium battery pack 10 and the second lithium battery pack 20 adjacent to each other and insulated, and controls the charging and discharging times of the first lithium battery pack 10 and the second lithium battery pack 20 differently through the battery management module 30, so that their battery powers are different in the same time period. Based on the large difference in the thermal runaway behavior of lithium batteries in different states of charge, during the operation of the lithium battery system, since the first lithium battery pack 10 and the second lithium battery pack 20 with different battery powers are adjacent, the energy transferred to the first sub-battery 11 or the second sub-battery 21 through the tab during the thermal runaway of the battery is effectively reduced, that is, the spread of thermal runaway between battery packs is effectively inhibited, and further the phenomenon of thermal spread of lithium batteries is prevented.

[0051] As Figure 2 shown, an embodiment of the present application provides a lithium battery system 200. The difference between the lithium battery system 200 and the lithium battery system 100 is that in the lithium battery system 200: the first input terminal IN1 of the first first battery column L1 and the first input terminal IN1 of the second first battery column L1 are respectively electrically connected to the output terminal 31 of the battery management module 30, the first output terminal OU1 of the second first battery column L1 is electrically connected to the first input terminal IN1 of the third first battery column L1, the first output terminal OU1 of the first first battery column L1 is electrically connected to the first input terminal IN1 of the fourth first battery column L1, the first output terminal OU1 of the third first battery column L1 is electrically connected to the first input terminal IN1 of the sixth first battery column L1, the first output terminal OU1 of the fourth first battery column L1 is electrically connected to the first input terminal IN1 of the fifth first battery column L1, and the first output terminal OU1 of the fifth first battery column L1 and the first output terminal OU1 of the sixth first battery column L1 are electrically connected to the first input terminal IN1 of at least one adjacent first battery column L1 or to the input terminal 32 of the battery management module 30.

[0052] In an embodiment of the present application, the number of the first battery columns L1 is equal to the number of the second battery columns L2, and the connection manner between the plurality of first sub-batteries 11 is the same as the connection manner between the plurality of second sub-batteries 21.

[0053] In an embodiment of the present application, the second input terminals IN2 of the first second battery column L2 and the second input terminals IN2 of the second second battery column L2 are respectively electrically connected to the output terminal 31 of the battery management module 30. The second output terminal OU2 of the second second battery column L2 is electrically connected to the second input terminal IN2 of the third second battery column L2. The second output terminal OU2 of the first second battery column L2 is electrically connected to the second input terminal IN2 of the fourth second battery column L2. The second output terminal OU2 of the third second battery column L2 is electrically connected to the second input terminal IN2 of the sixth second battery column L2. The second output terminal OU2 of the fourth second battery column L2 is electrically connected to the second input terminal IN2 of the fifth second battery column L2. The second output terminal OU2 of the fifth second battery column L2 and the second output terminal OU2 of the sixth second battery column L2 are electrically connected to the second input terminal IN2 of at least one adjacent second battery column L2 or to the input terminal 32 of the battery management module 30.

[0054] The other structures of the lithium battery system 200 are the same as those of the lithium battery system 100, so they will not be described herein again.

[0055] As Figure 3 shown, an embodiment of the present application provides a lithium battery system 300. The difference between the lithium battery system 300 and the lithium battery system 100 is that in the lithium battery system 300: the first input terminal IN1 of the first first battery column L1 is electrically connected to the output terminal 31 of the battery management module 30. The first output terminal OU1 of the first first battery column L1 is electrically connected to the first input terminal IN1 of the second first battery column L1. The first output terminal OU1 of the second first battery column L1 is electrically connected to the first input terminal IN1 of the third first battery column L1. The first output terminal OU1 of the third first battery column L1 is electrically connected to the first input terminal IN1 of the fourth first battery column L1. The first output terminal OU1 of the fourth first battery column L1 is electrically connected to the first input terminal IN1 of the fifth first battery column L1 or to the input terminal 32 of the battery management module 30.

[0056] In an embodiment of the present application, the number of the first battery columns L1 is equal to the number of the second battery columns L2, and the connection manner between the plurality of first sub-batteries 11 is the same as the connection manner between the plurality of second sub-batteries 21.

[0057] In an embodiment of the present application, the second input terminal IN2 of the first second battery column L2 is electrically connected to the output terminal 31 of the battery management module 30. The second output terminal OU2 of the first second battery column L2 is electrically connected to the second input terminal IN2 of the second second battery column L2. The second output terminal OU2 of the second second battery column L2 is electrically connected to the second input terminal IN2 of the third second battery column L2. The second output terminal OU2 of the third second battery column L2 is electrically connected to the second input terminal IN2 of the fourth second battery column L2. The second output terminal OU2 of the fourth second battery column L2 is electrically connected to the second input terminal IN2 of the fifth second battery column L2 or to the input terminal 32 of the battery management module 30.

[0058] The other structures of the lithium battery system 300 are the same as those of the lithium battery system 100, so they will not be described herein again.

[0059] As Figure 4 shown, an embodiment of the present application provides a lithium battery system 400. The difference between the lithium battery system 400 and the lithium battery system 100 is that in the lithium battery system 400: the number of the first battery columns L1 is N, and N is a positive integer greater than or equal to 4. The values of N include 4, 5, 6, 7, 8, 9, 10...

[0060] In an embodiment of the present application, the first input terminal IN1 of the first first battery column L1, the first input terminal IN1 of the Nth first battery column L1, and the output terminal 31 of the battery management module 30 are electrically connected. The first output terminal OU1 of the first first battery column L1, the first output terminal OU1 of the Nth first battery column L1, and the input terminal 32 of the battery management module 30 are electrically connected. The first input terminal IN1 of the second first battery column L1, the first input terminal IN1 of the (N - 1)th first battery column L1, and the output terminal 31 of the battery management module 30 are electrically connected. The first output terminal OU1 of the second first battery column L1, the first output terminal OU1 of the (N - 1)th first battery column L1, and the input terminal 32 of the battery management module 30 are electrically connected.

[0061] In an embodiment of the present application, the number of the first battery columns L1 is equal to the number of the second battery columns L2, and the connection manner between the multiple first sub - batteries 11 is the same as the connection manner between the multiple second sub - batteries 21.

[0062] In an embodiment of the present application, the number of the second battery columns L2 is N, where N is a positive integer greater than or equal to 4. The second input terminal IN2 of the first second battery column L2, the second input terminal IN2 of the Nth second battery column L2, and the output terminal 31 of the battery management module 30 are electrically connected. The second output terminal OU2 of the first second battery column L2, the second output terminal OU2 of the Nth second battery column L2, and the input terminal 32 of the battery management module 30 are electrically connected. The second input terminal IN2 of the second second battery column L2, the second input terminal IN2 of the (N - 1)th second battery column L2, and the output terminal 31 of the battery management module 30 are electrically connected. The second output terminal OU2 of the second second battery column L2, the second output terminal OU2 of the (N - 1)th second battery column L2, and the input terminal 32 of the battery management module 30 are electrically connected.

[0063] Other structures of the lithium battery system 400 are the same as those of the lithium battery system 100, so they will not be described herein again.

[0064] As Figure 5 shown, an embodiment of the present application provides a lithium battery system 500. The difference between the lithium battery system 500 and the lithium battery system 100 is that in the lithium battery system 500: the number of the first battery columns L1 is N, where N is a positive integer greater than or equal to 3. The first input terminals IN1 of the N first battery columns L1 are all electrically connected to the output terminal 31 of the battery management module 30, and the first output terminals OU1 of the N first battery columns L1 are all electrically connected to the input terminal 32 of the battery management module 30. The values of N include 3, 4, 5, 6, 7, 8, 9, 10...

[0065] In an embodiment of the present application, the number of the first battery columns L1 is equal to the number of the second battery columns L2, and the connection manner between the multiple first sub - batteries 11 is the same as the connection manner between the multiple second sub - batteries 21.

[0066] In an embodiment of the present application, the number of the second battery columns L2 is N, where N is a positive integer greater than or equal to 3. The second input terminals IN2 of the N second battery columns L are all electrically connected to the output terminal 31 of the battery management module 30, and the second output terminals OU2 of the N second battery columns L2 are all electrically connected to the input terminal 32 of the battery management module 30.

[0067] Other structures of the lithium battery system 500 are the same as those of the lithium battery system 100, so they will not be described herein again.

[0068] As Figure 6As shown in the figure, an embodiment of the present application provides a lithium battery system 600. The difference between the lithium battery system 600 and the lithium battery system 100 is that in the lithium battery system 600: both the first battery column L1 and the second battery column L2 include a first battery unit U1 and a second battery unit U2 arranged adjacent to each other along the second direction Y. The first battery unit U1 includes a plurality of first sub-batteries 11 arranged adjacent to each other along the second direction Y, and the second battery unit U2 includes a plurality of second sub-batteries 21 arranged adjacent to each other along the second direction Y. The number of the first battery units U1 in the first battery column L1 is equal to the number of the second battery units U2 in the first battery column L1 and they are arranged alternately. The number of the first battery units U1 in the second battery column L2 is equal to the number of the second battery units U2 in the second battery column L2 and they are arranged alternately. The first battery unit U1 and the second battery unit U2 are arranged alternately along the first direction X.

[0069] In an embodiment of the present application, the first input terminal IN1 includes a first sub-input terminal IN11 and a second sub-input terminal IN12, and the first output terminal OU1 includes a first sub-output terminal OU11 and a second sub-output terminal OU12.

[0070] In an embodiment of the present application, the first first sub-battery 11 in the first battery column L1 is electrically connected to the first sub-input terminal IN11, the last first sub-battery 11 arranged along the second direction Y in the first battery column L1 is electrically connected to the first sub-output terminal OU11, and the plurality of first sub-batteries 11 in the first battery column L1 are electrically connected in sequence from the first sub-input terminal IN11 to the first sub-output terminal OU11.

[0071] In an embodiment of the present application, the first second sub-battery 21 in the first battery column L1 is electrically connected to the second sub-input terminal IN12, the last second sub-battery 21 arranged along the second direction Y in the first battery column L1 is electrically connected to the second sub-output terminal OU12, and the plurality of second sub-batteries 21 in the first battery column L1 are electrically connected in sequence from the second sub-input terminal IN12 to the second sub-output terminal OU12.

[0072] In an embodiment of the present application, the second input terminal IN2 includes a third sub-input terminal IN21 and a fourth sub-input terminal IN22, and the second output terminal OU2 includes a third sub-output terminal OU21 and a fourth sub-output terminal OU22. The first first sub-battery 11 in the second battery column L2 is electrically connected to the third sub-input terminal IN21, the last first sub-battery 11 arranged along the second direction Y in the second battery column L2 is electrically connected to the third sub-output terminal OU21, and the plurality of first sub-batteries 11 in the second battery column L2 are electrically connected in sequence from the third sub-input terminal IN21 to the third sub-output terminal OU21.

[0073] In an embodiment of the present application, the first second sub - battery 21 in the second battery row L2 is electrically connected to the fourth sub - input terminal IN22, the last second sub - battery 21 arranged along the second direction Y in the second battery row L2 is electrically connected to the fourth sub - output terminal OU22, and multiple second sub - batteries 21 in the second battery row L2 are electrically connected in sequence from the fourth sub - input terminal IN22 to the fourth sub - output terminal OU22.

[0074] Exemplarily, Figure 6 the electrical connection manner of multiple first sub - batteries in the first lithium - battery pack in Figure 3 is the same as that of multiple first sub - batteries in the first lithium - battery pack in Figure 6 and the electrical connection manner of multiple second sub - batteries in the second lithium - battery pack in Figure 3 is the same as that of multiple second sub - batteries in the second lithium - battery pack in Figure 6 Specifically, the electrical connection manner of multiple first sub - batteries in the first lithium - battery pack in Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 can be the same as the electrical connection manner of multiple first sub - batteries in the first lithium - battery pack in any one of Figure 6 and the electrical connection manner of multiple second sub - batteries in the second lithium - battery pack in Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 can be the same as the electrical connection manner of multiple second sub - batteries in the second lithium - battery pack in any one of.

[0075] Other structures of the lithium - battery system 600 are the same as those of the lithium - battery system 100, so they will not be elaborated here.

[0076] As Figure 7 shown, an embodiment of the present application provides a lithium - battery system 700. The difference between the lithium - battery system 700 and the lithium - battery system 100 is that in the lithium - battery system 700: the first sub - battery 11 and the second sub - battery 21 are alternately arranged along the first direction X and the first sub - battery 11 and the second sub - battery 21 are alternately arranged along the second direction Y.

[0077] In an embodiment of the present application, the first input terminal IN1 includes a first sub - input terminal IN11 and a second sub - input terminal IN12, and the first output terminal OU1 includes a first sub - output terminal OU11 and a second sub - output terminal OU12.

[0078] In an embodiment of the present application, the first first sub-battery 11 in the first battery column L1 is electrically connected to the first sub-input terminal IN11, the last first sub-battery 11 arranged along the second direction Y in the first battery column L1 is electrically connected to the first sub-output terminal OU11, and the multiple first sub-batteries 11 in the first battery column L1 are electrically connected in sequence from the first sub-input terminal IN11 to the first sub-output terminal OU11.

[0079] In an embodiment of the present application, the first second sub-battery 21 in the first battery column L1 is electrically connected to the second sub-input terminal IN12, the last second sub-battery 21 arranged along the second direction Y in the first battery column L1 is electrically connected to the second sub-output terminal OU12, and the multiple second sub-batteries 21 in the first battery column L1 are electrically connected in sequence from the second sub-input terminal IN12 to the second sub-output terminal OU12.

[0080] In an embodiment of the present application, the second input terminal IN2 includes a third sub-input terminal IN21 and a fourth sub-input terminal IN22, and the second output terminal OU2 includes a third sub-output terminal OU21 and a fourth sub-output terminal OU22. The first first sub-battery 11 in the second battery column L2 is electrically connected to the third sub-input terminal IN21, the last first sub-battery 11 arranged along the second direction Y in the second battery column L2 is electrically connected to the third sub-output terminal OU21, and the multiple first sub-batteries 11 in the second battery column L2 are electrically connected in sequence from the third sub-input terminal IN21 to the third sub-output terminal OU21.

[0081] In an embodiment of the present application, the first second sub-battery 21 in the second battery column L2 is electrically connected to the fourth sub-input terminal IN22, the last second sub-battery 21 arranged along the second direction Y in the second battery column L2 is electrically connected to the fourth sub-output terminal OU22, and the multiple second sub-batteries 21 in the second battery column L2 are electrically connected in sequence from the fourth sub-input terminal IN22 to the fourth sub-output terminal OU22.

[0082] Exemplarily, Figure 7 [[ID=I4]]the electrical connection manner of the multiple first sub-batteries in the first lithium battery pack in Figure 3 is the same as that of the multiple first sub-batteries in the first lithium battery pack in Figure 7 and the electrical connection manner of the multiple second sub-batteries in the second lithium battery pack in Figure 3 is the same as that of the multiple second sub-batteries in the second lithium battery pack in Figure 7 Specifically, the electrical connection manner of the multiple first sub-batteries in the first lithium battery pack in Figure 1 can be the same as that in the above Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 andFigure 6 The electrical connection modes of the multiple first sub - batteries in the first lithium - battery pack in any one of them are the same, and Figure 7 the electrical connection modes of the multiple second sub - batteries in the second lithium - battery pack can be the same as those of the above - mentioned Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 the electrical connection modes of the multiple second sub - batteries in the second lithium - battery pack in any one of them are the same.

[0083] The other structures of the lithium - battery system 700 are the same as those of the lithium - battery system 100, so they will not be described herein again.

[0084] On the other hand, the present application provides an electronic device, and the electronic device includes the above - mentioned lithium - battery system.

[0085] In the electronic device provided by the present application, the lithium - battery system includes a first lithium - battery pack 10, a second lithium - battery pack 20, and a battery management module 30. The first lithium - battery pack 10 includes multiple first sub - batteries 11, and at least some of the first sub - batteries 11 are electrically connected. The second lithium - battery pack 20 is insulated from the first lithium - battery pack 10. The second lithium - battery pack 20 includes multiple second sub - batteries 21, and at least some of the second sub - batteries 21 are electrically connected. The battery management module 30 is electrically connected to the first lithium - battery pack 10 and the second lithium - battery pack 20 respectively. The battery management module 30 is used to obtain the battery power of the first lithium - battery pack 10 and the second lithium - battery pack 20, and control the charging time of the first lithium - battery pack 10 to be earlier than the charging time of the second lithium - battery pack 20 or control the discharging time of the second lithium - battery pack 20 to be earlier than the discharging time of the first lithium - battery pack 10. Among them, the types of the first sub - batteries 11 and the second sub - batteries 21 are the same, and each first sub - battery 11 is arranged adjacent to at least one second sub - battery 21. That is, in the lithium - battery system provided by the present application, the first lithium - battery pack 10 and the second lithium - battery pack 20 are arranged adjacent and insulated from each other, and the battery management module 30 controls the charging and discharging times of the first lithium - battery pack 10 and the second lithium - battery pack 20 to be different, so that their battery powers are not the same in the same time period. Based on the fact that the thermal runaway behaviors of lithium - batteries are quite different under different state - of - charge conditions, during the operation of the lithium - battery system, because the first lithium - battery pack 10 and the second lithium - battery pack 20 with different battery powers are adjacent to each other, the energy transferred to the first sub - battery 11 or the second sub - battery 21 through the tab during the thermal runaway process of the battery is effectively reduced, that is, the spread of thermal runaway between battery packs is effectively inhibited, and further the phenomenon of thermal propagation of lithium - batteries is prevented.

[0086] The above has introduced in detail a lithium battery system and an electronic device input for the embodiments of the present application. The description of the above embodiments is only used to help understand the core idea of the present application, and the above description should not be construed as a limitation on the protection scope of the present application.

Claims

1. A lithium battery system, characterized in that: include: a first lithium battery pack, the first lithium battery pack comprising a plurality of first sub-batteries, at least some of which are electrically connected; a second lithium battery pack, the second lithium battery pack being insulated from the first lithium battery pack, the second lithium battery pack comprising a plurality of second sub-batteries, at least some of which are electrically connected; a battery management module, the battery management module being electrically connected to the first lithium battery group and the second lithium battery group, respectively, and configured to obtain the battery levels of the first lithium battery group and the second lithium battery group, and to control the charging time of the first lithium battery group to precede the charging time of the second lithium battery group, or to control the discharge time of the second lithium battery group to precede the discharge time of the first lithium battery group; The first sub-cell and the second sub-cell are of the same type, and each of the first sub-cells is arranged adjacent to at least one of the second sub-cells; The first lithium battery group and the second lithium battery group include a plurality of first battery columns and a plurality of second battery columns, and the first battery columns and the second battery columns are alternately arranged along a first direction; The first battery column includes at least a plurality of the first sub-batteries arranged adjacent to each other along a second direction, and the second battery column includes at least a plurality of the second sub-batteries arranged adjacent to each other along the second direction, wherein the first direction is perpendicular to the second direction; The number of the first sub-cells in the first battery column is equal to the number of the second sub-cells in the second battery column, and the first sub-cells and the second sub-cells are adjacent to and alternately arranged along the first direction; The battery power of the first lithium battery pack is higher than the battery power of the second lithium battery pack.

2. The lithium battery system according to claim 1, characterized in that: The first sub-battery is a ternary lithium battery or a lithium iron phosphate battery.

3. The lithium battery system according to claim 1, wherein: The first battery column includes a first input end and a first output end, and the plurality of first sub-batteries in the first battery column are electrically connected in sequence from the first input end to the first output end, with at least two of the first input ends being electrically connected, and at least two of the first output ends being electrically connected; The second battery column includes a second input end and a second output end. The second sub-batteries located in the second battery column are electrically connected in sequence from the second input end to the second output end. At least two of the second input ends are electrically connected, and at least two of the second output ends are electrically connected.

4. The lithium battery system according to claim 3, characterized in that: The number of the first battery columns is equal to the number of the second battery columns, and the connection method between the first sub-batteries is the same as the connection method between the second sub-batteries.

5. The lithium battery system according to claim 4, characterized in that: The two first input ends of any two adjacent first battery columns are electrically connected to the output end of the battery management module, and the two first output ends of two adjacent first battery columns are electrically connected to the input end of the battery management module.

6. The lithium battery system according to claim 4, characterized in that: The first input end of the first first battery column, the first input end of the second first battery column and the output end of the battery management module are electrically connected, the first output end of the second first battery column is electrically connected to the first input end of the third first battery column, the first output end of the first first battery column is electrically connected to the first input end of the fourth first battery column, the first output end of the third first battery column is electrically connected to the first input end of the sixth first battery column, the first output end of the fourth first battery column is electrically connected to the first input end of the fifth first battery column, the first output end of the fifth first battery column and the first output end of the sixth first battery column are electrically connected to the first input end of at least one adjacent first battery column or to the input end of the battery management module.

7. The lithium battery system according to claim 4, characterized in that: The first input end of the first first battery column is electrically connected to the output end of the battery management module, the first output end of the first first battery column is electrically connected to the first input end of the second first battery column, the first output end of the second first battery column is electrically connected to the first input end of the third first battery column, the first output end of the third first battery column is electrically connected to the first input end of the fourth first battery column, and the first output end of the fourth first battery column is electrically connected to the first input end of the fifth first battery column or to the input end of the battery management module.

8. The lithium battery system according to claim 4, characterized in that: The number of the first battery columns is N, where N is a positive integer greater than or equal to 4; The first input end of the first first battery string, the first input end of the Nth first battery string, and the output end of the battery management module are electrically connected, and the first output end of the first first battery string, the first output end of the Nth first battery string, and the input end of the battery management module are electrically connected; The first input end of the second first battery column, the first input end of the N-1th first battery column, and the output end of the battery management module are electrically connected, and the first output end of the second first battery column, the first output end of the N-1th first battery column, and the input end of the battery management module are electrically connected.

9. The lithium battery system according to claim 4, characterized in that: The number of the first battery columns is N, where N is a positive integer greater than or equal to 3; The first input ends of the N first battery columns are all electrically connected to the output end of the battery management module, and the first output ends of the N first battery columns are all electrically connected to the input end of the battery management module.

10. The lithium battery system according to claim 4, characterized in that: The first battery column and the second battery column each include a first battery unit and a second battery unit adjacently arranged along the second direction, the first battery unit includes a plurality of the first sub-batteries adjacently arranged along the second direction, and the second battery unit includes a plurality of the second sub-batteries adjacently arranged along the second direction; The number of the first battery cells in the first battery column is equal to the number of the second battery cells in the first battery column and they are arranged alternately; The number of the first battery cells in the second battery column is equal to the number of the second battery cells in the second battery column and they are arranged alternately; The first battery cells and the second battery cells are alternately arranged along the first direction.

11. The lithium battery system according to claim 4, characterized in that: The first sub-cells and the second sub-cells are alternately arranged along the first direction and the first sub-cells and the second sub-cells are alternately arranged along the second direction.

12. The lithium battery system according to claim 10 or 11, characterized in that: The first input terminal includes a first sub-input terminal and a second sub-input terminal, and the first output terminal includes a first sub-output terminal and a second sub-output terminal; The first first sub-cell in the first battery column is electrically connected to the first sub-input terminal, the last first sub-cell in the first battery column arranged along the second direction is electrically connected to the first sub-output terminal, and the plurality of first sub-cells in the first battery column are electrically connected in sequence from the first sub-input terminal to the first sub-output terminal; The first second sub-battery in the first battery column is electrically connected to the second sub-input terminal, the last second sub-battery in the first battery column arranged along the second direction is electrically connected to the second sub-output terminal, and the plurality of second sub-batteries in the first battery column are electrically connected in sequence from the second sub-input terminal to the second sub-output terminal; The second input terminal includes a third sub-input terminal and a fourth sub-input terminal, and the second output terminal includes a third sub-output terminal and a fourth sub-output terminal; The first of the first sub-cells in the second battery column is electrically connected to the third sub-input terminal, the last of the first sub-cells arranged along the second direction in the second battery column is electrically connected to the third sub-output terminal, and the plurality of first sub-cells in the second battery column are electrically connected in sequence from the third sub-input terminal to the third sub-output terminal; The first second sub-battery in the second battery column is electrically connected to the fourth sub-input terminal, the last second sub-battery in the second battery column arranged along the second direction is electrically connected to the fourth sub-output terminal, and the multiple second sub-batteries in the second battery column are electrically connected in sequence from the fourth sub-input terminal to the fourth sub-output terminal.

13. An electronic device, characterized in that: The electronic device comprises the lithium battery system according to any one of claims 1 to 12.

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